cw1200: add driver for the ST-E CW1100 & CW1200 WLAN chipsets

Signed-off-by: Solomon Peachy <pizza@shaftnet.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

MAINTAINERS

@@ -2299,6 +2299,11 @@ M:	Jaya Kumar <jayakumar.alsa@gmail.com>
 S:	Maintained
 F:	sound/pci/cs5535audio/
 
+CW1200 WLAN driver
+M:     Solomon Peachy <pizza@shaftnet.org>
+S:     Maintained
+F:     drivers/net/wireless/cw1200/
+
 CX18 VIDEO4LINUX DRIVER
 M:	Andy Walls <awalls@md.metrocast.net>
 L:	ivtv-devel@ivtvdriver.org (moderated for non-subscribers)

drivers/net/wireless/Kconfig

@@ -280,5 +280,6 @@ source "drivers/net/wireless/rtlwifi/Kconfig"
 source "drivers/net/wireless/ti/Kconfig"
 source "drivers/net/wireless/zd1211rw/Kconfig"
 source "drivers/net/wireless/mwifiex/Kconfig"
+source "drivers/net/wireless/cw1200/Kconfig"
 
 endif # WLAN

drivers/net/wireless/Makefile

@@ -57,3 +57,5 @@ obj-$(CONFIG_MWIFIEX)	+= mwifiex/
 
 obj-$(CONFIG_BRCMFMAC)	+= brcm80211/
 obj-$(CONFIG_BRCMSMAC)	+= brcm80211/
+
+obj-$(CONFIG_CW1200)	+= cw1200/

drivers/net/wireless/cw1200/Kconfig

+config CW1200
+	tristate "CW1200 WLAN support"
+	depends on MAC80211 && CFG80211
+	help
+	  This is a driver for the ST-E CW1100 & CW1200 WLAN chipsets.
+	  This option just enables the driver core, see below for
+	  specific bus support.
+
+if CW1200
+
+config CW1200_WLAN_SDIO
+	tristate "Support SDIO platforms"
+	depends on CW1200 && MMC
+	help
+	  Enable support for the CW1200 connected via an SDIO bus.
+
+config CW1200_WLAN_SPI
+	tristate "Support SPI platforms"
+	depends on CW1200 && SPI
+	help
+	  Enables support for the CW1200 connected via a SPI bus.
+
+config CW1200_WLAN_SAGRAD
+	tristate "Support Sagrad SG901-1091/1098 modules"
+	depends on CW1200_WLAN_SDIO
+	help
+	  This provides the platform data glue to support the
+	  Sagrad SG901-1091/1098 modules in their standard SDIO EVK.
+	  It also includes example SPI platform data.
+
+menu "Driver debug features"
+	depends on CW1200 && DEBUG_FS
+
+config CW1200_ETF
+	bool "Enable CW1200 Engineering Test Framework hooks"
+	help
+	  If you don't know what this is, just say N.
+
+config CW1200_ITP
+	bool "Enable ITP access"
+	help
+	  If you don't know what this is, just say N.
+
+endmenu
+
+endif

drivers/net/wireless/cw1200/Makefile

+cw1200_core-y := \
+		fwio.o \
+		txrx.o \
+		main.o \
+		queue.o \
+		hwio.o \
+		bh.o \
+		wsm.o \
+		sta.o \
+		scan.o \
+		pm.o \
+		debug.o
+cw1200_core-$(CONFIG_CW1200_ITP)	+= itp.o
+
+# CFLAGS_sta.o += -DDEBUG
+
+cw1200_wlan_sdio-y := cw1200_sdio.o
+cw1200_wlan_spi-y := cw1200_spi.o
+cw1200_wlan_sagrad-y := cw1200_sagrad.o
+
+obj-$(CONFIG_CW1200) += cw1200_core.o
+obj-$(CONFIG_CW1200_WLAN_SDIO) += cw1200_wlan_sdio.o
+obj-$(CONFIG_CW1200_WLAN_SPI) += cw1200_wlan_spi.o
+obj-$(CONFIG_CW1200_WLAN_SAGRAD) += cw1200_wlan_sagrad.o

drivers/net/wireless/cw1200/bh.c

+/*
+ * Device handling thread implementation for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver, which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <net/mac80211.h>
+#include <linux/kthread.h>
+#include <linux/timer.h>
+
+#include "cw1200.h"
+#include "bh.h"
+#include "hwio.h"
+#include "wsm.h"
+#include "sbus.h"
+#include "debug.h"
+#include "fwio.h"
+
+static int cw1200_bh(void *arg);
+
+#define DOWNLOAD_BLOCK_SIZE_WR	(0x1000 - 4)
+/* an SPI message cannot be bigger than (2"12-1)*2 bytes
+ * "*2" to cvt to bytes */
+#define MAX_SZ_RD_WR_BUFFERS	(DOWNLOAD_BLOCK_SIZE_WR*2)
+#define PIGGYBACK_CTRL_REG	(2)
+#define EFFECTIVE_BUF_SIZE	(MAX_SZ_RD_WR_BUFFERS - PIGGYBACK_CTRL_REG)
+
+/* Suspend state privates */
+enum cw1200_bh_pm_state {
+	CW1200_BH_RESUMED = 0,
+	CW1200_BH_SUSPEND,
+	CW1200_BH_SUSPENDED,
+	CW1200_BH_RESUME,
+};
+
+typedef int (*cw1200_wsm_handler)(struct cw1200_common *priv,
+	u8 *data, size_t size);
+
+static void cw1200_bh_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+	container_of(work, struct cw1200_common, bh_work);
+	cw1200_bh(priv);
+}
+
+int cw1200_register_bh(struct cw1200_common *priv)
+{
+	int err = 0;
+	/* Realtime workqueue */
+	priv->bh_workqueue = alloc_workqueue("cw1200_bh",
+				WQ_MEM_RECLAIM | WQ_HIGHPRI
+				| WQ_CPU_INTENSIVE, 1);
+
+	if (!priv->bh_workqueue)
+		return -ENOMEM;
+
+	INIT_WORK(&priv->bh_work, cw1200_bh_work);
+
+	pr_debug("[BH] register.\n");
+
+	atomic_set(&priv->bh_rx, 0);
+	atomic_set(&priv->bh_tx, 0);
+	atomic_set(&priv->bh_term, 0);
+	atomic_set(&priv->bh_suspend, CW1200_BH_RESUMED);
+	priv->bh_error = 0;
+	priv->hw_bufs_used = 0;
+	priv->buf_id_tx = 0;
+	priv->buf_id_rx = 0;
+	init_waitqueue_head(&priv->bh_wq);
+	init_waitqueue_head(&priv->bh_evt_wq);
+
+	err = !queue_work(priv->bh_workqueue, &priv->bh_work);
+	WARN_ON(err);
+	return err;
+}
+
+void cw1200_unregister_bh(struct cw1200_common *priv)
+{
+	atomic_add(1, &priv->bh_term);
+	wake_up(&priv->bh_wq);
+
+	flush_workqueue(priv->bh_workqueue);
+
+	destroy_workqueue(priv->bh_workqueue);
+	priv->bh_workqueue = NULL;
+
+	pr_debug("[BH] unregistered.\n");
+}
+
+void cw1200_irq_handler(struct cw1200_common *priv)
+{
+	pr_debug("[BH] irq.\n");
+
+	/* Disable Interrupts! */
+	/* NOTE:  sbus_ops->lock already held */
+	__cw1200_irq_enable(priv, 0);
+
+	if (/* WARN_ON */(priv->bh_error))
+		return;
+
+	if (atomic_add_return(1, &priv->bh_rx) == 1)
+		wake_up(&priv->bh_wq);
+}
+EXPORT_SYMBOL_GPL(cw1200_irq_handler);
+
+void cw1200_bh_wakeup(struct cw1200_common *priv)
+{
+	pr_debug("[BH] wakeup.\n");
+	if (priv->bh_error) {
+		pr_err("[BH] wakeup failed (BH error)\n");
+		return;
+	}
+
+	if (atomic_add_return(1, &priv->bh_tx) == 1)
+		wake_up(&priv->bh_wq);
+}
+
+int cw1200_bh_suspend(struct cw1200_common *priv)
+{
+	pr_debug("[BH] suspend.\n");
+	if (priv->bh_error) {
+		wiphy_warn(priv->hw->wiphy, "BH error -- can't suspend\n");
+		return -EINVAL;
+	}
+
+	atomic_set(&priv->bh_suspend, CW1200_BH_SUSPEND);
+	wake_up(&priv->bh_wq);
+	return wait_event_timeout(priv->bh_evt_wq, priv->bh_error ||
+		(CW1200_BH_SUSPENDED == atomic_read(&priv->bh_suspend)),
+		 1 * HZ) ? 0 : -ETIMEDOUT;
+}
+
+int cw1200_bh_resume(struct cw1200_common *priv)
+{
+	pr_debug("[BH] resume.\n");
+	if (priv->bh_error) {
+		wiphy_warn(priv->hw->wiphy, "BH error -- can't resume\n");
+		return -EINVAL;
+	}
+
+	atomic_set(&priv->bh_suspend, CW1200_BH_RESUME);
+	wake_up(&priv->bh_wq);
+	return wait_event_timeout(priv->bh_evt_wq, priv->bh_error ||
+		(CW1200_BH_RESUMED == atomic_read(&priv->bh_suspend)),
+		1 * HZ) ? 0 : -ETIMEDOUT;
+}
+
+static inline void wsm_alloc_tx_buffer(struct cw1200_common *priv)
+{
+	++priv->hw_bufs_used;
+}
+
+int wsm_release_tx_buffer(struct cw1200_common *priv, int count)
+{
+	int ret = 0;
+	int hw_bufs_used = priv->hw_bufs_used;
+
+	priv->hw_bufs_used -= count;
+	if (WARN_ON(priv->hw_bufs_used < 0))
+		ret = -1;
+	else if (hw_bufs_used >= priv->wsm_caps.input_buffers)
+		ret = 1;
+	if (!priv->hw_bufs_used)
+		wake_up(&priv->bh_evt_wq);
+	return ret;
+}
+
+static int cw1200_bh_read_ctrl_reg(struct cw1200_common *priv,
+					  u16 *ctrl_reg)
+{
+	int ret;
+
+	ret = cw1200_reg_read_16(priv,
+			ST90TDS_CONTROL_REG_ID, ctrl_reg);
+	if (ret) {
+		ret = cw1200_reg_read_16(priv,
+				ST90TDS_CONTROL_REG_ID, ctrl_reg);
+		if (ret)
+			pr_err("[BH] Failed to read control register.\n");
+	}
+
+	return ret;
+}
+
+static int cw1200_device_wakeup(struct cw1200_common *priv)
+{
+	u16 ctrl_reg;
+	int ret;
+
+	pr_debug("[BH] Device wakeup.\n");
+
+	/* First, set the dpll register */
+	ret = cw1200_reg_write_32(priv, ST90TDS_TSET_GEN_R_W_REG_ID,
+				  cw1200_dpll_from_clk(priv->hw_refclk));
+	if (WARN_ON(ret))
+		return ret;
+
+	/* To force the device to be always-on, the host sets WLAN_UP to 1 */
+	ret = cw1200_reg_write_16(priv, ST90TDS_CONTROL_REG_ID,
+			ST90TDS_CONT_WUP_BIT);
+	if (WARN_ON(ret))
+		return ret;
+
+	ret = cw1200_bh_read_ctrl_reg(priv, &ctrl_reg);
+	if (WARN_ON(ret))
+		return ret;
+
+	/* If the device returns WLAN_RDY as 1, the device is active and will
+	 * remain active. */
+	if (ctrl_reg & ST90TDS_CONT_RDY_BIT) {
+		pr_debug("[BH] Device awake.\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+/* Must be called from BH thraed. */
+void cw1200_enable_powersave(struct cw1200_common *priv,
+			     bool enable)
+{
+	pr_debug("[BH] Powerave is %s.\n",
+		 enable ? "enabled" : "disabled");
+	priv->powersave_enabled = enable;
+}
+
+static int cw1200_bh_rx_helper(struct cw1200_common *priv,
+			       uint16_t *ctrl_reg,
+			       int *tx)
+{
+	size_t read_len = 0;
+	struct sk_buff *skb_rx = NULL;
+	struct wsm_hdr *wsm;
+	size_t wsm_len;
+	u16 wsm_id;
+	u8 wsm_seq;
+	int rx_resync = 1;
+
+	size_t alloc_len;
+	u8 *data;
+
+	read_len = (*ctrl_reg & ST90TDS_CONT_NEXT_LEN_MASK) * 2;
+	if (!read_len)
+		return 0; /* No more work */
+
+	if (WARN_ON((read_len < sizeof(struct wsm_hdr)) ||
+		    (read_len > EFFECTIVE_BUF_SIZE))) {
+		pr_debug("Invalid read len: %zu (%04x)",
+			 read_len, *ctrl_reg);
+		goto err;
+	}
+
+	/* Add SIZE of PIGGYBACK reg (CONTROL Reg)
+	 * to the NEXT Message length + 2 Bytes for SKB */
+	read_len = read_len + 2;
+
+	alloc_len = priv->sbus_ops->align_size(
+		priv->sbus_priv, read_len);
+
+	/* Check if not exceeding CW1200 capabilities */
+	if (WARN_ON_ONCE(alloc_len > EFFECTIVE_BUF_SIZE)) {
+		pr_debug("Read aligned len: %zu\n",
+			 alloc_len);
+	}
+
+	skb_rx = dev_alloc_skb(alloc_len);
+	if (WARN_ON(!skb_rx))
+		goto err;
+
+	skb_trim(skb_rx, 0);
+	skb_put(skb_rx, read_len);
+	data = skb_rx->data;
+	if (WARN_ON(!data))
+		goto err;
+
+	if (WARN_ON(cw1200_data_read(priv, data, alloc_len))) {
+		pr_err("rx blew up, len %zu\n", alloc_len);
+		goto err;
+	}
+
+	/* Piggyback */
+	*ctrl_reg = __le16_to_cpu(
+		((__le16 *)data)[alloc_len / 2 - 1]);
+
+	wsm = (struct wsm_hdr *)data;
+	wsm_len = __le16_to_cpu(wsm->len);
+	if (WARN_ON(wsm_len > read_len))
+		goto err;
+
+	if (priv->wsm_enable_wsm_dumps)
+		print_hex_dump_bytes("<-- ",
+				     DUMP_PREFIX_NONE,
+				     data, wsm_len);
+
+	wsm_id  = __le16_to_cpu(wsm->id) & 0xFFF;
+	wsm_seq = (__le16_to_cpu(wsm->id) >> 13) & 7;
+
+	skb_trim(skb_rx, wsm_len);
+
+	if (wsm_id == 0x0800) {
+		wsm_handle_exception(priv,
+				     &data[sizeof(*wsm)],
+				     wsm_len - sizeof(*wsm));
+		goto err;
+	} else if (!rx_resync) {
+		if (WARN_ON(wsm_seq != priv->wsm_rx_seq))
+			goto err;
+	}
+	priv->wsm_rx_seq = (wsm_seq + 1) & 7;
+	rx_resync = 0;
+
+	if (wsm_id & 0x0400) {
+		int rc = wsm_release_tx_buffer(priv, 1);
+		if (WARN_ON(rc < 0))
+			return rc;
+		else if (rc > 0)
+			*tx = 1;
+	}
+
+	/* cw1200_wsm_rx takes care on SKB livetime */
+	if (WARN_ON(wsm_handle_rx(priv, wsm_id, wsm, &skb_rx)))
+		goto err;
+
+	if (skb_rx) {
+		dev_kfree_skb(skb_rx);
+		skb_rx = NULL;
+	}
+
+	return 0;
+
+err:
+	if (skb_rx) {
+		dev_kfree_skb(skb_rx);
+		skb_rx = NULL;
+	}
+	return -1;
+}
+
+static int cw1200_bh_tx_helper(struct cw1200_common *priv,
+			       int *pending_tx,
+			       int *tx_burst)
+{
+	size_t tx_len;
+	u8 *data;
+	int ret;
+	struct wsm_hdr *wsm;
+
+	if (priv->device_can_sleep) {
+		ret = cw1200_device_wakeup(priv);
+		if (WARN_ON(ret < 0)) { /* Error in wakeup */
+			*pending_tx = 1;
+			return 0;
+		} else if (ret) { /* Woke up */
+			priv->device_can_sleep = false;
+		} else { /* Did not awake */
+			*pending_tx = 1;
+			return 0;
+		}
+	}
+
+	wsm_alloc_tx_buffer(priv);
+	ret = wsm_get_tx(priv, &data, &tx_len, tx_burst);
+	if (ret <= 0) {
+		wsm_release_tx_buffer(priv, 1);
+		if (WARN_ON(ret < 0))
+			return ret; /* Error */
+		return 0; /* No work */
+	}
+
+	wsm = (struct wsm_hdr *)data;
+	BUG_ON(tx_len < sizeof(*wsm));
+	BUG_ON(__le16_to_cpu(wsm->len) != tx_len);
+
+	atomic_add(1, &priv->bh_tx);
+
+	tx_len = priv->sbus_ops->align_size(
+		priv->sbus_priv, tx_len);
+
+	/* Check if not exceeding CW1200 capabilities */
+	if (WARN_ON_ONCE(tx_len > EFFECTIVE_BUF_SIZE))
+		pr_debug("Write aligned len: %zu\n", tx_len);
+
+	wsm->id &= __cpu_to_le16(0xffff ^ WSM_TX_SEQ(WSM_TX_SEQ_MAX));
+	wsm->id |= __cpu_to_le16(WSM_TX_SEQ(priv->wsm_tx_seq));
+
+	if (WARN_ON(cw1200_data_write(priv, data, tx_len))) {
+		pr_err("tx blew up, len %zu\n", tx_len);
+		wsm_release_tx_buffer(priv, 1);
+		return -1; /* Error */
+	}
+
+	if (priv->wsm_enable_wsm_dumps)
+		print_hex_dump_bytes("--> ",
+				     DUMP_PREFIX_NONE,
+				     data,
+				     __le16_to_cpu(wsm->len));
+
+	wsm_txed(priv, data);
+	priv->wsm_tx_seq = (priv->wsm_tx_seq + 1) & WSM_TX_SEQ_MAX;
+
+	if (*tx_burst > 1) {
+		cw1200_debug_tx_burst(priv);
+		return 1; /* Work remains */
+	}
+
+	return 0;
+}
+
+static int cw1200_bh(void *arg)
+{
+	struct cw1200_common *priv = arg;
+	int rx, tx, term, suspend;
+	u16 ctrl_reg = 0;
+	int tx_allowed;
+	int pending_tx = 0;
+	int tx_burst;
+	long status;
+	u32 dummy;
+	int ret;
+
+	for (;;) {
+		if (!priv->hw_bufs_used &&
+		    priv->powersave_enabled &&
+		    !priv->device_can_sleep &&
+		    !atomic_read(&priv->recent_scan)) {
+			status = 1 * HZ;
+			pr_debug("[BH] Device wakedown. No data.\n");
+			cw1200_reg_write_16(priv, ST90TDS_CONTROL_REG_ID, 0);
+			priv->device_can_sleep = true;
+		} else if (priv->hw_bufs_used) {
+			/* Interrupt loss detection */
+			status = 1 * HZ;
+		} else {
+			status = MAX_SCHEDULE_TIMEOUT;
+		}
+
+		/* Dummy Read for SDIO retry mechanism*/
+		if ((priv->hw_type != -1) &&
+		    (atomic_read(&priv->bh_rx) == 0) &&
+		    (atomic_read(&priv->bh_tx) == 0))
+			cw1200_reg_read(priv, ST90TDS_CONFIG_REG_ID,
+					&dummy, sizeof(dummy));
+
+		pr_debug("[BH] waiting ...\n");
+		status = wait_event_interruptible_timeout(priv->bh_wq, ({
+				rx = atomic_xchg(&priv->bh_rx, 0);
+				tx = atomic_xchg(&priv->bh_tx, 0);
+				term = atomic_xchg(&priv->bh_term, 0);
+				suspend = pending_tx ?
+					0 : atomic_read(&priv->bh_suspend);
+				(rx || tx || term || suspend || priv->bh_error);
+			}), status);
+
+		pr_debug("[BH] - rx: %d, tx: %d, term: %d, suspend: %d, status: %ld\n",
+			 rx, tx, term, suspend, status);
+
+		/* Did an error occur? */
+		if ((status < 0 && status != -ERESTARTSYS) ||
+		    term || priv->bh_error) {
+			break;
+		}
+		if (!status) {  /* wait_event timed out */
+			unsigned long timestamp = jiffies;
+			long timeout;
+			int pending = 0;
+			int i;
+
+			/* Check to see if we have any outstanding frames */
+			if (priv->hw_bufs_used && (!rx || !tx)) {
+				wiphy_warn(priv->hw->wiphy,
+					   "Missed interrupt? (%d frames outstanding)\n",
+					   priv->hw_bufs_used);
+				rx = 1;
+
+				/* Get a timestamp of "oldest" frame */
+				for (i = 0; i < 4; ++i)
+					pending += cw1200_queue_get_xmit_timestamp(
+						&priv->tx_queue[i],
+						&timestamp,
+						priv->pending_frame_id);
+
+				/* Check if frame transmission is timed out.
+				 * Add an extra second with respect to possible
+				 * interrupt loss.
+				 */
+				timeout = timestamp +
+					WSM_CMD_LAST_CHANCE_TIMEOUT +
+					1 * HZ  -
+					jiffies;
+
+				/* And terminate BH thread if the frame is "stuck" */
+				if (pending && timeout < 0) {
+					wiphy_warn(priv->hw->wiphy,
+						   "Timeout waiting for TX confirm (%d/%d pending, %ld vs %lu).\n",
+						   priv->hw_bufs_used, pending,
+						   timestamp, jiffies);
+					break;
+				}
+			} else if (!priv->device_can_sleep &&
+				   !atomic_read(&priv->recent_scan)) {
+				pr_debug("[BH] Device wakedown. Timeout.\n");
+				cw1200_reg_write_16(priv,
+						    ST90TDS_CONTROL_REG_ID, 0);
+				priv->device_can_sleep = true;
+			}
+			goto done;
+		} else if (suspend) {
+			pr_debug("[BH] Device suspend.\n");
+			if (priv->powersave_enabled) {
+				pr_debug("[BH] Device wakedown. Suspend.\n");
+				cw1200_reg_write_16(priv,
+						    ST90TDS_CONTROL_REG_ID, 0);
+				priv->device_can_sleep = true;
+			}
+
+			atomic_set(&priv->bh_suspend, CW1200_BH_SUSPENDED);
+			wake_up(&priv->bh_evt_wq);
+			status = wait_event_interruptible(priv->bh_wq,
+							  CW1200_BH_RESUME == atomic_read(&priv->bh_suspend));
+			if (status < 0) {
+				wiphy_err(priv->hw->wiphy,
+					  "Failed to wait for resume: %ld.\n",
+					  status);
+				break;
+			}
+			pr_debug("[BH] Device resume.\n");
+			atomic_set(&priv->bh_suspend, CW1200_BH_RESUMED);
+			wake_up(&priv->bh_evt_wq);
+			atomic_add(1, &priv->bh_rx);
+			goto done;
+		}
+
+	rx:
+		tx += pending_tx;
+		pending_tx = 0;
+
+		if (cw1200_bh_read_ctrl_reg(priv, &ctrl_reg))
+			break;
+
+		/* Don't bother trying to rx unless we have data to read */
+		if (ctrl_reg & ST90TDS_CONT_NEXT_LEN_MASK) {
+			ret = cw1200_bh_rx_helper(priv, &ctrl_reg, &tx);
+			if (ret < 0)
+				break;
+			/* Double up here if there's more data.. */
+			if (ctrl_reg & ST90TDS_CONT_NEXT_LEN_MASK) {
+				ret = cw1200_bh_rx_helper(priv, &ctrl_reg, &tx);
+				if (ret < 0)
+					break;
+			}
+		}
+
+	tx:
+		if (tx) {
+			tx = 0;
+
+			BUG_ON(priv->hw_bufs_used > priv->wsm_caps.input_buffers);
+			tx_burst = priv->wsm_caps.input_buffers - priv->hw_bufs_used;
+			tx_allowed = tx_burst > 0;
+
+			if (!tx_allowed) {
+				/* Buffers full.  Ensure we process tx
+				 * after we handle rx..
+				 */
+				pending_tx = tx;
+				goto done_rx;
+			}
+			ret = cw1200_bh_tx_helper(priv, &pending_tx, &tx_burst);
+			if (ret < 0)
+				break;
+			if (ret > 0) /* More to transmit */
+				tx = ret;
+
+			/* Re-read ctrl reg */
+			if (cw1200_bh_read_ctrl_reg(priv, &ctrl_reg))
+				break;
+		}
+
+	done_rx:
+		if (priv->bh_error)
+			break;
+		if (ctrl_reg & ST90TDS_CONT_NEXT_LEN_MASK)
+			goto rx;
+		if (tx)
+			goto tx;
+
+	done:
+		/* Re-enable device interrupts */
+		priv->sbus_ops->lock(priv->sbus_priv);
+		__cw1200_irq_enable(priv, 1);
+		priv->sbus_ops->unlock(priv->sbus_priv);
+	}
+
+	/* Explicitly disable device interrupts */
+	priv->sbus_ops->lock(priv->sbus_priv);
+	__cw1200_irq_enable(priv, 0);
+	priv->sbus_ops->unlock(priv->sbus_priv);
+
+	if (!term) {
+		pr_err("[BH] Fatal error, exiting.\n");
+		priv->bh_error = 1;
+		/* TODO: schedule_work(recovery) */
+	}
+	return 0;
+}

drivers/net/wireless/cw1200/bh.h

+/*
+ * Device handling thread interface for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_BH_H
+#define CW1200_BH_H
+
+/* extern */ struct cw1200_common;
+
+int cw1200_register_bh(struct cw1200_common *priv);
+void cw1200_unregister_bh(struct cw1200_common *priv);
+void cw1200_irq_handler(struct cw1200_common *priv);
+void cw1200_bh_wakeup(struct cw1200_common *priv);
+int cw1200_bh_suspend(struct cw1200_common *priv);
+int cw1200_bh_resume(struct cw1200_common *priv);
+/* Must be called from BH thread. */
+void cw1200_enable_powersave(struct cw1200_common *priv,
+			     bool enable);
+int wsm_release_tx_buffer(struct cw1200_common *priv, int count);
+
+#endif /* CW1200_BH_H */

drivers/net/wireless/cw1200/cw1200.h

+/*
+ * Common private data for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on the mac80211 Prism54 code, which is
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ *
+ * Based on the islsm (softmac prism54) driver, which is:
+ * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_H
+#define CW1200_H
+
+#include <linux/wait.h>
+#include <linux/version.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <net/mac80211.h>
+
+#include "queue.h"
+#include "wsm.h"
+#include "scan.h"
+#include "txrx.h"
+#include "pm.h"
+
+/* Forward declarations */
+struct sbus_ops;
+struct task_struct;
+struct cw1200_debug_priv;
+struct firmware;
+
+#ifdef CONFIG_CW1200_ETF
+extern int etf_mode;
+extern char *etf_firmware;
+#endif
+
+#define CW1200_MAX_CTRL_FRAME_LEN	(0x1000)
+
+#define CW1200_MAX_STA_IN_AP_MODE	(5)
+#define CW1200_LINK_ID_AFTER_DTIM	(CW1200_MAX_STA_IN_AP_MODE + 1)
+#define CW1200_LINK_ID_UAPSD		(CW1200_MAX_STA_IN_AP_MODE + 2)
+#define CW1200_LINK_ID_MAX		(CW1200_MAX_STA_IN_AP_MODE + 3)
+#define CW1200_MAX_REQUEUE_ATTEMPTS	(5)
+
+#define CW1200_MAX_TID			(8)
+
+#define CW1200_BLOCK_ACK_CNT		(30)
+#define CW1200_BLOCK_ACK_THLD		(800)
+#define CW1200_BLOCK_ACK_HIST		(3)
+#define CW1200_BLOCK_ACK_INTERVAL	(1 * HZ / CW1200_BLOCK_ACK_HIST)
+
+#define CW1200_JOIN_TIMEOUT		(1 * HZ)
+#define CW1200_AUTH_TIMEOUT		(5 * HZ)
+
+struct cw1200_ht_info {
+	struct ieee80211_sta_ht_cap     ht_cap;
+	enum nl80211_channel_type       channel_type;
+	u16                             operation_mode;
+};
+
+/* Please keep order */
+enum cw1200_join_status {
+	CW1200_JOIN_STATUS_PASSIVE = 0,
+	CW1200_JOIN_STATUS_MONITOR,
+	CW1200_JOIN_STATUS_JOINING,
+	CW1200_JOIN_STATUS_PRE_STA,
+	CW1200_JOIN_STATUS_STA,
+	CW1200_JOIN_STATUS_IBSS,
+	CW1200_JOIN_STATUS_AP,
+};
+
+enum cw1200_link_status {
+	CW1200_LINK_OFF,
+	CW1200_LINK_RESERVE,
+	CW1200_LINK_SOFT,
+	CW1200_LINK_HARD,
+	CW1200_LINK_RESET,
+	CW1200_LINK_RESET_REMAP,
+};
+
+extern int cw1200_power_mode;
+extern const char * const cw1200_fw_types[];
+
+struct cw1200_link_entry {
+	unsigned long			timestamp;
+	enum cw1200_link_status		status;
+	enum cw1200_link_status		prev_status;
+	u8				mac[ETH_ALEN];
+	u8				buffered[CW1200_MAX_TID];
+	struct sk_buff_head		rx_queue;
+};
+
+struct cw1200_common {
+	/* interfaces to the rest of the stack */
+	struct ieee80211_hw		*hw;
+	struct ieee80211_vif		*vif;
+	struct device			*pdev;
+
+	/* Statistics */
+	struct ieee80211_low_level_stats stats;
+
+	/* Our macaddr */
+	u8 mac_addr[ETH_ALEN];
+
+	/* Hardware interface */
+	const struct sbus_ops		*sbus_ops;
+	struct sbus_priv		*sbus_priv;
+
+	/* Hardware information */
+	enum {
+		HIF_9000_SILICON_VERSATILE = 0,
+		HIF_8601_VERSATILE,
+		HIF_8601_SILICON,
+	} hw_type;
+	enum {
+		CW1200_HW_REV_CUT10 = 10,
+		CW1200_HW_REV_CUT11 = 11,
+		CW1200_HW_REV_CUT20 = 20,
+		CW1200_HW_REV_CUT22 = 22,
+		CW1X60_HW_REV       = 40,
+	} hw_revision;
+	int                             hw_refclk;
+	bool				hw_have_5ghz;
+	const struct firmware		*sdd;
+	char                            *sdd_path;
+
+	struct cw1200_debug_priv	*debug;
+
+	struct workqueue_struct		*workqueue;
+	struct mutex			conf_mutex;
+
+	struct cw1200_queue		tx_queue[4];
+	struct cw1200_queue_stats	tx_queue_stats;
+	int				tx_burst_idx;
+
+	/* firmware/hardware info */
+	unsigned int tx_hdr_len;
+
+	/* Radio data */
+	int output_power;
+
+	/* BBP/MAC state */
+	struct ieee80211_rate		*rates;
+	struct ieee80211_rate		*mcs_rates;
+	struct ieee80211_channel	*channel;
+	struct wsm_edca_params		edca;
+	struct wsm_tx_queue_params	tx_queue_params;
+	struct wsm_mib_association_mode	association_mode;
+	struct wsm_set_bss_params	bss_params;
+	struct cw1200_ht_info		ht_info;
+	struct wsm_set_pm		powersave_mode;
+	struct wsm_set_pm		firmware_ps_mode;
+	int				cqm_rssi_thold;
+	unsigned			cqm_rssi_hyst;
+	bool				cqm_use_rssi;
+	int				cqm_beacon_loss_count;
+	int				channel_switch_in_progress;
+	wait_queue_head_t		channel_switch_done;
+	u8				long_frame_max_tx_count;
+	u8				short_frame_max_tx_count;
+	int				mode;
+	bool				enable_beacon;
+	int				beacon_int;
+	bool				listening;
+	struct wsm_rx_filter		rx_filter;
+	struct wsm_mib_multicast_filter multicast_filter;
+	bool				has_multicast_subscription;
+	bool				disable_beacon_filter;
+	struct work_struct		update_filtering_work;
+	struct work_struct		set_beacon_wakeup_period_work;
+
+	u8				ba_rx_tid_mask;
+	u8				ba_tx_tid_mask;
+
+	struct cw1200_pm_state		pm_state;
+
+	struct wsm_p2p_ps_modeinfo	p2p_ps_modeinfo;
+	struct wsm_uapsd_info		uapsd_info;
+	bool				setbssparams_done;
+	bool				bt_present;
+	u8				conf_listen_interval;
+	u32				listen_interval;
+	u32				erp_info;
+	u32				rts_threshold;
+
+	/* BH */
+	atomic_t			bh_rx;
+	atomic_t			bh_tx;
+	atomic_t			bh_term;
+	atomic_t			bh_suspend;
+
+	struct workqueue_struct         *bh_workqueue;
+	struct work_struct              bh_work;
+
+	int				bh_error;
+	wait_queue_head_t		bh_wq;
+	wait_queue_head_t		bh_evt_wq;
+	u8				buf_id_tx;
+	u8				buf_id_rx;
+	u8				wsm_rx_seq;
+	u8				wsm_tx_seq;
+	int				hw_bufs_used;
+	bool				powersave_enabled;
+	bool				device_can_sleep;
+
+	/* Scan status */
+	struct cw1200_scan scan;
+	/* Keep cw1200 awake (WUP = 1) 1 second after each scan to avoid
+	 * FW issue with sleeping/waking up. */
+	atomic_t			recent_scan;
+	struct delayed_work		clear_recent_scan_work;
+
+	/* WSM */
+	struct wsm_startup_ind		wsm_caps;
+	struct mutex			wsm_cmd_mux;
+	struct wsm_buf			wsm_cmd_buf;
+	struct wsm_cmd			wsm_cmd;
+	wait_queue_head_t		wsm_cmd_wq;
+	wait_queue_head_t		wsm_startup_done;
+	int                             firmware_ready;
+	atomic_t			tx_lock;
+
+	/* WSM debug */
+	int				wsm_enable_wsm_dumps;
+
+	/* WSM Join */
+	enum cw1200_join_status	join_status;
+	u32			pending_frame_id;
+	bool			join_pending;
+	struct delayed_work	join_timeout;
+	struct work_struct	unjoin_work;
+	struct work_struct	join_complete_work;
+	int			join_complete_status;
+	int			join_dtim_period;
+	bool			delayed_unjoin;
+
+	/* TX/RX and security */
+	s8			wep_default_key_id;
+	struct work_struct	wep_key_work;
+	u32			key_map;
+	struct wsm_add_key	keys[WSM_KEY_MAX_INDEX + 1];
+
+	/* AP powersave */
+	u32			link_id_map;
+	struct cw1200_link_entry link_id_db[CW1200_MAX_STA_IN_AP_MODE];
+	struct work_struct	link_id_work;
+	struct delayed_work	link_id_gc_work;
+	u32			sta_asleep_mask;
+	u32			pspoll_mask;
+	bool			aid0_bit_set;
+	spinlock_t		ps_state_lock; /* Protect power save state */
+	bool			buffered_multicasts;
+	bool			tx_multicast;
+	struct work_struct	set_tim_work;
+	struct work_struct	set_cts_work;
+	struct work_struct	multicast_start_work;
+	struct work_struct	multicast_stop_work;
+	struct timer_list	mcast_timeout;
+
+	/* WSM events and CQM implementation */
+	spinlock_t		event_queue_lock; /* Protect event queue */
+	struct list_head	event_queue;
+	struct work_struct	event_handler;
+
+	struct delayed_work	bss_loss_work;
+	spinlock_t		bss_loss_lock; /* Protect BSS loss state */
+	int                     bss_loss_state;
+	int                     bss_loss_confirm_id;
+	int			delayed_link_loss;
+	struct work_struct	bss_params_work;
+
+	/* TX rate policy cache */
+	struct tx_policy_cache tx_policy_cache;
+	struct work_struct tx_policy_upload_work;
+
+	/* legacy PS mode switch in suspend */
+	int			ps_mode_switch_in_progress;
+	wait_queue_head_t	ps_mode_switch_done;
+
+	/* Workaround for WFD testcase 6.1.10*/
+	struct work_struct	linkid_reset_work;
+	u8			action_frame_sa[ETH_ALEN];
+	u8			action_linkid;
+
+#ifdef CONFIG_CW1200_ETF
+	struct sk_buff_head etf_q;
+#endif
+};
+
+struct cw1200_sta_priv {
+	int link_id;
+};
+
+/* interfaces for the drivers */
+int cw1200_core_probe(const struct sbus_ops *sbus_ops,
+		      struct sbus_priv *sbus,
+		      struct device *pdev,
+		      struct cw1200_common **pself,
+		      int ref_clk, const u8 *macaddr,
+		      const char *sdd_path, bool have_5ghz);
+void cw1200_core_release(struct cw1200_common *self);
+
+#define FWLOAD_BLOCK_SIZE (1024)
+
+static inline int cw1200_is_ht(const struct cw1200_ht_info *ht_info)
+{
+	return ht_info->channel_type != NL80211_CHAN_NO_HT;
+}
+
+static inline int cw1200_ht_greenfield(const struct cw1200_ht_info *ht_info)
+{
+	return cw1200_is_ht(ht_info) &&
+		(ht_info->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
+		!(ht_info->operation_mode &
+		  IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
+}
+
+static inline int cw1200_ht_ampdu_density(const struct cw1200_ht_info *ht_info)
+{
+	if (!cw1200_is_ht(ht_info))
+		return 0;
+	return ht_info->ht_cap.ampdu_density;
+}
+
+#endif /* CW1200_H */

drivers/net/wireless/cw1200/cw1200_sagrad.c

+/*
+ * Platform glue data for ST-Ericsson CW1200 driver
+ *
+ * Copyright (c) 2013, Sagrad, Inc
+ * Author: Solomon Peachy <speachy@sagrad.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/cw1200_platform.h>
+
+MODULE_AUTHOR("Solomon Peachy <speachy@sagrad.com>");
+MODULE_DESCRIPTION("ST-Ericsson CW1200 Platform glue driver");
+MODULE_LICENSE("GPL");
+
+/* Define just one of these.  Feel free to customize as needed */
+#define SAGRAD_1091_1098_EVK_SDIO
+/* #define SAGRAD_1091_1098_EVK_SPI */
+
+#ifdef SAGRAD_1091_1098_EVK_SDIO
+#if 0
+static struct resource cw1200_href_resources[] = {
+	{
+		.start = 215,  /* fix me as appropriate */
+		.end = 215,    /* ditto */
+		.flags = IORESOURCE_IO,
+		.name = "cw1200_wlan_reset",
+	},
+	{
+		.start = 216,  /* fix me as appropriate */
+		.end = 216,    /* ditto */
+		.flags = IORESOURCE_IO,
+		.name = "cw1200_wlan_powerup",
+	},
+	{
+		.start = NOMADIK_GPIO_TO_IRQ(216), /* fix me as appropriate */
+		.end = NOMADIK_GPIO_TO_IRQ(216),   /* ditto */
+		.flags = IORESOURCE_IRQ,
+		.name = "cw1200_wlan_irq",
+	},
+};
+#endif
+
+static int cw1200_power_ctrl(const struct cw1200_platform_data_sdio *pdata,
+			     bool enable)
+{
+	/* Control 3v3 and 1v8 to hardware as appropriate */
+	/* Note this is not needed if it's controlled elsewhere or always on */
+
+	/* May require delay for power to stabilize */
+	return 0;
+}
+
+static int cw1200_clk_ctrl(const struct cw1200_platform_data_sdio *pdata,
+			   bool enable)
+{
+	/* Turn CLK_32K off and on as appropriate. */
+	/* Note this is not needed if it's always on */
+
+	/* May require delay for clock to stabilize */
+	return 0;
+}
+
+static struct cw1200_platform_data_sdio cw1200_platform_data = {
+	.ref_clk = 38400,
+	.have_5ghz = false,
+#if 0
+	.reset = &cw1200_href_resources[0],
+	.powerup = &cw1200_href_resources[1],
+	.irq = &cw1200_href_resources[2],
+#endif
+	.power_ctrl = cw1200_power_ctrl,
+	.clk_ctrl = cw1200_clk_ctrl,
+/*	.macaddr = ??? */
+	.sdd_file = "sdd_sagrad_1091_1098.bin",
+};
+#endif
+
+#ifdef SAGRAD_1091_1098_EVK_SPI
+/* Note that this is an example of integrating into your board support file */
+static struct resource cw1200_href_resources[] = {
+	{
+		.start = GPIO_RF_RESET,
+		.end = GPIO_RF_RESET,
+		.flags = IORESOURCE_IO,
+		.name = "cw1200_wlan_reset",
+	},
+	{
+		.start = GPIO_RF_POWERUP,
+		.end = GPIO_RF_POWERUP,
+		.flags = IORESOURCE_IO,
+		.name = "cw1200_wlan_powerup",
+	},
+};
+
+static int cw1200_power_ctrl(const struct cw1200_platform_data_spi *pdata,
+			     bool enable)
+{
+	/* Control 3v3 and 1v8 to hardware as appropriate */
+	/* Note this is not needed if it's controlled elsewhere or always on */
+
+	/* May require delay for power to stabilize */
+	return 0;
+}
+static int cw1200_clk_ctrl(const struct cw1200_platform_data_spi *pdata,
+			   bool enable)
+{
+	/* Turn CLK_32K off and on as appropriate. */
+	/* Note this is not needed if it's always on */
+
+	/* May require delay for clock to stabilize */
+	return 0;
+}
+
+static struct cw1200_platform_data_spi cw1200_platform_data = {
+	.ref_clk = 38400,
+	.spi_bits_per_word = 16,
+	.reset = &cw1200_href_resources[0],
+	.powerup = &cw1200_href_resources[1],
+	.power_ctrl = cw1200_power_ctrl,
+	.clk_ctrl = cw1200_clk_ctrl,
+/*	.macaddr = ??? */
+	.sdd_file = "sdd_sagrad_1091_1098.bin",
+};
+static struct spi_board_info myboard_spi_devices[] __initdata = {
+	{
+		.modalias = "cw1200_wlan_spi",
+		.max_speed_hz = 10000000, /* 52MHz Max */
+		.bus_num = 0,
+		.irq = WIFI_IRQ,
+		.platform_data = &cw1200_platform_data,
+		.chip_select = 0,
+	},
+};
+#endif
+
+
+const void *cw1200_get_platform_data(void)
+{
+	return &cw1200_platform_data;
+}
+EXPORT_SYMBOL_GPL(cw1200_get_platform_data);

drivers/net/wireless/cw1200/cw1200_sdio.c

+/*
+ * Mac80211 SDIO driver for ST-Ericsson CW1200 device
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <net/mac80211.h>
+
+#include "cw1200.h"
+#include "sbus.h"
+#include <linux/cw1200_platform.h>
+#include "hwio.h"
+
+MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
+MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SDIO driver");
+MODULE_LICENSE("GPL");
+
+#define SDIO_BLOCK_SIZE (512)
+
+struct sbus_priv {
+	struct sdio_func	*func;
+	struct cw1200_common	*core;
+	const struct cw1200_platform_data_sdio *pdata;
+};
+
+#ifndef SDIO_VENDOR_ID_STE
+#define SDIO_VENDOR_ID_STE		0x0020
+#endif
+
+#ifndef SDIO_DEVICE_ID_STE_CW1200
+#define SDIO_DEVICE_ID_STE_CW1200	0x2280
+#endif
+
+static const struct sdio_device_id cw1200_sdio_ids[] = {
+	{ SDIO_DEVICE(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200) },
+	{ /* end: all zeroes */			},
+};
+
+/* sbus_ops implemetation */
+
+static int cw1200_sdio_memcpy_fromio(struct sbus_priv *self,
+				     unsigned int addr,
+				     void *dst, int count)
+{
+	return sdio_memcpy_fromio(self->func, dst, addr, count);
+}
+
+static int cw1200_sdio_memcpy_toio(struct sbus_priv *self,
+				   unsigned int addr,
+				   const void *src, int count)
+{
+	return sdio_memcpy_toio(self->func, addr, (void *)src, count);
+}
+
+static void cw1200_sdio_lock(struct sbus_priv *self)
+{
+	sdio_claim_host(self->func);
+}
+
+static void cw1200_sdio_unlock(struct sbus_priv *self)
+{
+	sdio_release_host(self->func);
+}
+
+static void cw1200_sdio_irq_handler(struct sdio_func *func)
+{
+	struct sbus_priv *self = sdio_get_drvdata(func);
+
+	/* note:  sdio_host already claimed here. */
+	if (self->core)
+		cw1200_irq_handler(self->core);
+}
+
+static irqreturn_t cw1200_gpio_hardirq(int irq, void *dev_id)
+{
+	return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t cw1200_gpio_irq(int irq, void *dev_id)
+{
+	struct sbus_priv *self = dev_id;
+
+	if (self->core) {
+		sdio_claim_host(self->func);
+		cw1200_irq_handler(self->core);
+		sdio_release_host(self->func);
+		return IRQ_HANDLED;
+	} else {
+		return IRQ_NONE;
+	}
+}
+
+static int cw1200_request_irq(struct sbus_priv *self)
+{
+	int ret;
+	const struct resource *irq = self->pdata->irq;
+	u8 cccr;
+
+	cccr = sdio_f0_readb(self->func, SDIO_CCCR_IENx, &ret);
+	if (WARN_ON(ret))
+		goto err;
+
+	/* Master interrupt enable ... */
+	cccr |= BIT(0);
+
+	/* ... for our function */
+	cccr |= BIT(self->func->num);
+
+	sdio_f0_writeb(self->func, cccr, SDIO_CCCR_IENx, &ret);
+	if (WARN_ON(ret))
+		goto err;
+
+	ret = enable_irq_wake(irq->start);
+	if (WARN_ON(ret))
+		goto err;
+
+	/* Request the IRQ */
+	ret =  request_threaded_irq(irq->start, cw1200_gpio_hardirq,
+				    cw1200_gpio_irq,
+				    IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+				    irq->name, self);
+	if (WARN_ON(ret))
+		goto err;
+
+	return 0;
+
+err:
+	return ret;
+}
+
+static int cw1200_sdio_irq_subscribe(struct sbus_priv *self)
+{
+	int ret = 0;
+
+	pr_debug("SW IRQ subscribe\n");
+	sdio_claim_host(self->func);
+	if (self->pdata->irq)
+		ret = cw1200_request_irq(self);
+	else
+		ret = sdio_claim_irq(self->func, cw1200_sdio_irq_handler);
+
+	sdio_release_host(self->func);
+	return ret;
+}
+
+static int cw1200_sdio_irq_unsubscribe(struct sbus_priv *self)
+{
+	int ret = 0;
+
+	pr_debug("SW IRQ unsubscribe\n");
+
+	if (self->pdata->irq) {
+		disable_irq_wake(self->pdata->irq->start);
+		free_irq(self->pdata->irq->start, self);
+	} else {
+		sdio_claim_host(self->func);
+		ret = sdio_release_irq(self->func);
+		sdio_release_host(self->func);
+	}
+	return ret;
+}
+
+static int cw1200_sdio_off(const struct cw1200_platform_data_sdio *pdata)
+{
+	const struct resource *reset = pdata->reset;
+
+	if (reset) {
+		gpio_set_value(reset->start, 0);
+		msleep(30); /* Min is 2 * CLK32K cycles */
+		gpio_free(reset->start);
+	}
+
+	if (pdata->power_ctrl)
+		pdata->power_ctrl(pdata, false);
+	if (pdata->clk_ctrl)
+		pdata->clk_ctrl(pdata, false);
+
+	return 0;
+}
+
+static int cw1200_sdio_on(const struct cw1200_platform_data_sdio *pdata)
+{
+	const struct resource *reset = pdata->reset;
+	const struct resource *powerup = pdata->reset;
+
+	/* Ensure I/Os are pulled low */
+	if (reset) {
+		gpio_request(reset->start, reset->name);
+		gpio_direction_output(reset->start, 0);
+	}
+	if (powerup) {
+		gpio_request(powerup->start, powerup->name);
+		gpio_direction_output(powerup->start, 0);
+	}
+	if (reset || powerup)
+		msleep(50); /* Settle time */
+
+	/* Enable 3v3 and 1v8 to hardware */
+	if (pdata->power_ctrl) {
+		if (pdata->power_ctrl(pdata, true)) {
+			pr_err("power_ctrl() failed!\n");
+			return -1;
+		}
+	}
+
+	/* Enable CLK32K */
+	if (pdata->clk_ctrl) {
+		if (pdata->clk_ctrl(pdata, true)) {
+			pr_err("clk_ctrl() failed!\n");
+			return -1;
+		}
+		msleep(10); /* Delay until clock is stable for 2 cycles */
+	}
+
+	/* Enable POWERUP signal */
+	if (powerup) {
+		gpio_set_value(powerup->start, 1);
+		msleep(250); /* or more..? */
+	}
+	/* Enable RSTn signal */
+	if (reset) {
+		gpio_set_value(reset->start, 1);
+		msleep(50); /* Or more..? */
+	}
+	return 0;
+}
+
+static size_t cw1200_sdio_align_size(struct sbus_priv *self, size_t size)
+{
+	if (self->pdata->no_nptb)
+		size = round_up(size, SDIO_BLOCK_SIZE);
+	else
+		size = sdio_align_size(self->func, size);
+
+	return size;
+}
+
+static int cw1200_sdio_pm(struct sbus_priv *self, bool suspend)
+{
+	int ret = 0;
+
+	if (self->pdata->irq)
+		ret = irq_set_irq_wake(self->pdata->irq->start, suspend);
+	return ret;
+}
+
+static struct sbus_ops cw1200_sdio_sbus_ops = {
+	.sbus_memcpy_fromio	= cw1200_sdio_memcpy_fromio,
+	.sbus_memcpy_toio	= cw1200_sdio_memcpy_toio,
+	.lock			= cw1200_sdio_lock,
+	.unlock			= cw1200_sdio_unlock,
+	.align_size		= cw1200_sdio_align_size,
+	.power_mgmt		= cw1200_sdio_pm,
+};
+
+/* Probe Function to be called by SDIO stack when device is discovered */
+static int cw1200_sdio_probe(struct sdio_func *func,
+				       const struct sdio_device_id *id)
+{
+	struct sbus_priv *self;
+	int status;
+
+	pr_info("cw1200_wlan_sdio: Probe called\n");
+
+       /* We are only able to handle the wlan function */
+	if (func->num != 0x01)
+		return -ENODEV;
+
+	self = kzalloc(sizeof(*self), GFP_KERNEL);
+	if (!self) {
+		pr_err("Can't allocate SDIO sbus_priv.\n");
+		return -ENOMEM;
+	}
+
+	func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+
+	self->pdata = cw1200_get_platform_data();
+	self->func = func;
+	sdio_set_drvdata(func, self);
+	sdio_claim_host(func);
+	sdio_enable_func(func);
+	sdio_release_host(func);
+
+	status = cw1200_sdio_irq_subscribe(self);
+
+	status = cw1200_core_probe(&cw1200_sdio_sbus_ops,
+				   self, &func->dev, &self->core,
+				   self->pdata->ref_clk,
+				   self->pdata->macaddr,
+				   self->pdata->sdd_file,
+				   self->pdata->have_5ghz);
+	if (status) {
+		cw1200_sdio_irq_unsubscribe(self);
+		sdio_claim_host(func);
+		sdio_disable_func(func);
+		sdio_release_host(func);
+		sdio_set_drvdata(func, NULL);
+		kfree(self);
+	}
+
+	return status;
+}
+
+/* Disconnect Function to be called by SDIO stack when
+ * device is disconnected */
+static void cw1200_sdio_disconnect(struct sdio_func *func)
+{
+	struct sbus_priv *self = sdio_get_drvdata(func);
+
+	if (self) {
+		cw1200_sdio_irq_unsubscribe(self);
+		if (self->core) {
+			cw1200_core_release(self->core);
+			self->core = NULL;
+		}
+		sdio_claim_host(func);
+		sdio_disable_func(func);
+		sdio_release_host(func);
+		sdio_set_drvdata(func, NULL);
+		kfree(self);
+	}
+}
+
+static int cw1200_sdio_suspend(struct device *dev)
+{
+	int ret;
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	struct sbus_priv *self = sdio_get_drvdata(func);
+
+	if (!cw1200_can_suspend(self->core))
+		return -EAGAIN;
+
+	/* Notify SDIO that CW1200 will remain powered during suspend */
+	ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+	if (ret)
+		pr_err("Error setting SDIO pm flags: %i\n", ret);
+
+	return ret;
+}
+
+static int cw1200_sdio_resume(struct device *dev)
+{
+	return 0;
+}
+
+static const struct dev_pm_ops cw1200_pm_ops = {
+	.suspend = cw1200_sdio_suspend,
+	.resume = cw1200_sdio_resume,
+};
+
+static struct sdio_driver sdio_driver = {
+	.name		= "cw1200_wlan_sdio",
+	.id_table	= cw1200_sdio_ids,
+	.probe		= cw1200_sdio_probe,
+	.remove		= cw1200_sdio_disconnect,
+	.drv = {
+		.pm = &cw1200_pm_ops,
+	}
+};
+
+/* Init Module function -> Called by insmod */
+static int __init cw1200_sdio_init(void)
+{
+	const struct cw1200_platform_data_sdio *pdata;
+	int ret;
+
+	pdata = cw1200_get_platform_data();
+
+	if (cw1200_sdio_on(pdata)) {
+		ret = -1;
+		goto err;
+	}
+
+	ret = sdio_register_driver(&sdio_driver);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	cw1200_sdio_off(pdata);
+	return ret;
+}
+
+/* Called at Driver Unloading */
+static void __exit cw1200_sdio_exit(void)
+{
+	const struct cw1200_platform_data_sdio *pdata;
+	pdata = cw1200_get_platform_data();
+	sdio_unregister_driver(&sdio_driver);
+	cw1200_sdio_off(pdata);
+}
+
+
+module_init(cw1200_sdio_init);
+module_exit(cw1200_sdio_exit);

drivers/net/wireless/cw1200/cw1200_spi.c

+/*
+ * Mac80211 SPI driver for ST-Ericsson CW1200 device
+ *
+ * Copyright (c) 2011, Sagrad Inc.
+ * Author:  Solomon Peachy <speachy@sagrad.com>
+ *
+ * Based on cw1200_sdio.c
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <net/mac80211.h>
+
+#include <linux/spi/spi.h>
+#include <linux/device.h>
+
+#include "cw1200.h"
+#include "sbus.h"
+#include <linux/cw1200_platform.h>
+#include "hwio.h"
+
+MODULE_AUTHOR("Solomon Peachy <speachy@sagrad.com>");
+MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SPI driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:cw1200_wlan_spi");
+
+/* #define SPI_DEBUG */
+
+struct sbus_priv {
+	struct spi_device	*func;
+	struct cw1200_common	*core;
+	const struct cw1200_platform_data_spi *pdata;
+	spinlock_t		lock; /* Serialize all bus operations */
+	int claimed;
+};
+
+#define SDIO_TO_SPI_ADDR(addr) ((addr & 0x1f)>>2)
+#define SET_WRITE 0x7FFF /* usage: and operation */
+#define SET_READ 0x8000  /* usage: or operation */
+
+/*
+   Notes on byte ordering:
+   LE:  B0 B1 B2 B3
+   BE:  B3 B2 B1 B0
+
+   Hardware expects 32-bit data to be written as 16-bit BE words:
+
+   B1 B0 B3 B2
+
+*/
+
+static int cw1200_spi_memcpy_fromio(struct sbus_priv *self,
+				     unsigned int addr,
+				     void *dst, int count)
+{
+	int ret, i;
+	uint16_t regaddr;
+	struct spi_message      m;
+
+	struct spi_transfer     t_addr = {
+		.tx_buf         = &regaddr,
+		.len            = sizeof(regaddr),
+	};
+	struct spi_transfer     t_msg = {
+		.rx_buf         = dst,
+		.len            = count,
+	};
+
+	regaddr = (SDIO_TO_SPI_ADDR(addr))<<12;
+	regaddr |= SET_READ;
+	regaddr |= (count>>1);
+	regaddr = cpu_to_le16(regaddr);
+
+#ifdef SPI_DEBUG
+	pr_info("READ : %04d from 0x%02x (%04x)\n", count, addr,
+		le16_to_cpu(regaddr));
+#endif
+
+#if defined(__LITTLE_ENDIAN)
+	/* We have to byteswap if the SPI bus is limited to 8b operation */
+	if (self->func->bits_per_word == 8)
+#endif
+		regaddr = swab16(regaddr);
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t_addr, &m);
+	spi_message_add_tail(&t_msg, &m);
+	ret = spi_sync(self->func, &m);
+
+#ifdef SPI_DEBUG
+	pr_info("READ : ");
+	for (i = 0; i < t_addr.len; i++)
+		printk("%02x ", ((u8 *)t_addr.tx_buf)[i]);
+	printk(" : ");
+	for (i = 0; i < t_msg.len; i++)
+		printk("%02x ", ((u8 *)t_msg.rx_buf)[i]);
+	printk("\n");
+#endif
+
+#if defined(__LITTLE_ENDIAN)
+	/* We have to byteswap if the SPI bus is limited to 8b operation */
+	if (self->func->bits_per_word == 8)
+#endif
+	{
+		uint16_t *buf = (uint16_t *)dst;
+		for (i = 0; i < ((count + 1) >> 1); i++)
+			buf[i] = swab16(buf[i]);
+	}
+
+	return ret;
+}
+
+static int cw1200_spi_memcpy_toio(struct sbus_priv *self,
+				   unsigned int addr,
+				   const void *src, int count)
+{
+	int rval, i;
+	uint16_t regaddr;
+	struct spi_transfer     t_addr = {
+		.tx_buf         = &regaddr,
+		.len            = sizeof(regaddr),
+	};
+	struct spi_transfer     t_msg = {
+		.tx_buf         = src,
+		.len            = count,
+	};
+	struct spi_message      m;
+
+	regaddr = (SDIO_TO_SPI_ADDR(addr))<<12;
+	regaddr &= SET_WRITE;
+	regaddr |= (count>>1);
+	regaddr = cpu_to_le16(regaddr);
+
+#ifdef SPI_DEBUG
+	pr_info("WRITE: %04d  to  0x%02x (%04x)\n", count, addr,
+		le16_to_cpu(regaddr));
+#endif
+
+#if defined(__LITTLE_ENDIAN)
+	/* We have to byteswap if the SPI bus is limited to 8b operation */
+	if (self->func->bits_per_word == 8)
+#endif
+	{
+		uint16_t *buf = (uint16_t *)src;
+		regaddr = swab16(regaddr);
+		for (i = 0; i < ((count + 1) >> 1); i++)
+			buf[i] = swab16(buf[i]);
+	}
+
+#ifdef SPI_DEBUG
+	pr_info("WRITE: ");
+	for (i = 0; i < t_addr.len; i++)
+		printk("%02x ", ((u8 *)t_addr.tx_buf)[i]);
+	printk(" : ");
+	for (i = 0; i < t_msg.len; i++)
+		printk("%02x ", ((u8 *)t_msg.tx_buf)[i]);
+	printk("\n");
+#endif
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t_addr, &m);
+	spi_message_add_tail(&t_msg, &m);
+	rval = spi_sync(self->func, &m);
+
+#ifdef SPI_DEBUG
+	pr_info("WROTE: %d\n", m.actual_length);
+#endif
+
+#if defined(__LITTLE_ENDIAN)
+	/* We have to byteswap if the SPI bus is limited to 8b operation */
+	if (self->func->bits_per_word == 8)
+#endif
+	{
+		uint16_t *buf = (uint16_t *)src;
+		for (i = 0; i < ((count + 1) >> 1); i++)
+			buf[i] = swab16(buf[i]);
+	}
+	return rval;
+}
+
+static void cw1200_spi_lock(struct sbus_priv *self)
+{
+	unsigned long flags;
+
+	might_sleep();
+
+	spin_lock_irqsave(&self->lock, flags);
+	while (1) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (!self->claimed)
+			break;
+		spin_unlock_irqrestore(&self->lock, flags);
+		schedule();
+		spin_lock_irqsave(&self->lock, flags);
+	}
+	set_current_state(TASK_RUNNING);
+	self->claimed = 1;
+	spin_unlock_irqrestore(&self->lock, flags);
+
+	return;
+}
+
+static void cw1200_spi_unlock(struct sbus_priv *self)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&self->lock, flags);
+	self->claimed = 0;
+	spin_unlock_irqrestore(&self->lock, flags);
+	return;
+}
+
+static irqreturn_t cw1200_spi_irq_handler(int irq, void *dev_id)
+{
+	struct sbus_priv *self = dev_id;
+
+	if (self->core) {
+		cw1200_irq_handler(self->core);
+		return IRQ_HANDLED;
+	} else {
+		return IRQ_NONE;
+	}
+}
+
+static int cw1200_spi_irq_subscribe(struct sbus_priv *self)
+{
+	int ret;
+
+	pr_debug("SW IRQ subscribe\n");
+
+	ret = request_any_context_irq(self->func->irq, cw1200_spi_irq_handler,
+				      IRQF_TRIGGER_HIGH,
+				      "cw1200_wlan_irq", self);
+	if (WARN_ON(ret < 0))
+		goto exit;
+
+	ret = enable_irq_wake(self->func->irq);
+	if (WARN_ON(ret))
+		goto free_irq;
+
+	return 0;
+
+free_irq:
+	free_irq(self->func->irq, self);
+exit:
+	return ret;
+}
+
+static int cw1200_spi_irq_unsubscribe(struct sbus_priv *self)
+{
+	int ret = 0;
+
+	pr_debug("SW IRQ unsubscribe\n");
+	disable_irq_wake(self->func->irq);
+	free_irq(self->func->irq, self);
+
+	return ret;
+}
+
+static int cw1200_spi_off(const struct cw1200_platform_data_spi *pdata)
+{
+	const struct resource *reset = pdata->reset;
+
+	if (reset) {
+		gpio_set_value(reset->start, 0);
+		msleep(30); /* Min is 2 * CLK32K cycles */
+		gpio_free(reset->start);
+	}
+
+	if (pdata->power_ctrl)
+		pdata->power_ctrl(pdata, false);
+	if (pdata->clk_ctrl)
+		pdata->clk_ctrl(pdata, false);
+
+	return 0;
+}
+
+static int cw1200_spi_on(const struct cw1200_platform_data_spi *pdata)
+{
+	const struct resource *reset = pdata->reset;
+	const struct resource *powerup = pdata->reset;
+
+	/* Ensure I/Os are pulled low */
+	if (reset) {
+		gpio_request(reset->start, reset->name);
+		gpio_direction_output(reset->start, 0);
+	}
+	if (powerup) {
+		gpio_request(powerup->start, powerup->name);
+		gpio_direction_output(powerup->start, 0);
+	}
+	if (reset || powerup)
+		msleep(10); /* Settle time? */
+
+	/* Enable 3v3 and 1v8 to hardware */
+	if (pdata->power_ctrl) {
+		if (pdata->power_ctrl(pdata, true)) {
+			pr_err("power_ctrl() failed!\n");
+			return -1;
+		}
+	}
+
+	/* Enable CLK32K */
+	if (pdata->clk_ctrl) {
+		if (pdata->clk_ctrl(pdata, true)) {
+			pr_err("clk_ctrl() failed!\n");
+			return -1;
+		}
+		msleep(10); /* Delay until clock is stable for 2 cycles */
+	}
+
+	/* Enable POWERUP signal */
+	if (powerup) {
+		gpio_set_value(powerup->start, 1);
+		msleep(250); /* or more..? */
+	}
+	/* Enable RSTn signal */
+	if (reset) {
+		gpio_set_value(reset->start, 1);
+		msleep(50); /* Or more..? */
+	}
+	return 0;
+}
+
+static size_t cw1200_spi_align_size(struct sbus_priv *self, size_t size)
+{
+	return size & 1 ? size + 1 : size;
+}
+
+static int cw1200_spi_pm(struct sbus_priv *self, bool suspend)
+{
+	return irq_set_irq_wake(self->func->irq, suspend);
+}
+
+static struct sbus_ops cw1200_spi_sbus_ops = {
+	.sbus_memcpy_fromio	= cw1200_spi_memcpy_fromio,
+	.sbus_memcpy_toio	= cw1200_spi_memcpy_toio,
+	.lock			= cw1200_spi_lock,
+	.unlock			= cw1200_spi_unlock,
+	.align_size		= cw1200_spi_align_size,
+	.power_mgmt		= cw1200_spi_pm,
+};
+
+/* Probe Function to be called by SPI stack when device is discovered */
+static int cw1200_spi_probe(struct spi_device *func)
+{
+	const struct cw1200_platform_data_spi *plat_data =
+		func->dev.platform_data;
+	struct sbus_priv *self;
+	int status;
+
+	/* Sanity check speed */
+	if (func->max_speed_hz > 52000000)
+		func->max_speed_hz = 52000000;
+	if (func->max_speed_hz < 1000000)
+		func->max_speed_hz = 1000000;
+
+	/* Fix up transfer size */
+	if (plat_data->spi_bits_per_word)
+		func->bits_per_word = plat_data->spi_bits_per_word;
+	if (!func->bits_per_word)
+		func->bits_per_word = 16;
+
+	/* And finally.. */
+	func->mode = SPI_MODE_0;
+
+	pr_info("cw1200_wlan_spi: Probe called (CS %d M %d BPW %d CLK %d)\n",
+		func->chip_select, func->mode, func->bits_per_word,
+		func->max_speed_hz);
+
+	if (cw1200_spi_on(plat_data)) {
+		pr_err("spi_on() failed!\n");
+		return -1;
+	}
+
+	if (spi_setup(func)) {
+		pr_err("spi_setup() failed!\n");
+		return -1;
+	}
+
+	self = kzalloc(sizeof(*self), GFP_KERNEL);
+	if (!self) {
+		pr_err("Can't allocate SPI sbus_priv.");
+		return -ENOMEM;
+	}
+
+	self->pdata = plat_data;
+	self->func = func;
+	spin_lock_init(&self->lock);
+
+	spi_set_drvdata(func, self);
+
+	status = cw1200_spi_irq_subscribe(self);
+
+	status = cw1200_core_probe(&cw1200_spi_sbus_ops,
+				   self, &func->dev, &self->core,
+				   self->pdata->ref_clk,
+				   self->pdata->macaddr,
+				   self->pdata->sdd_file,
+				   self->pdata->have_5ghz);
+
+	if (status) {
+		cw1200_spi_irq_unsubscribe(self);
+		cw1200_spi_off(plat_data);
+		kfree(self);
+	}
+
+	return status;
+}
+
+/* Disconnect Function to be called by SPI stack when device is disconnected */
+static int cw1200_spi_disconnect(struct spi_device *func)
+{
+	struct sbus_priv *self = spi_get_drvdata(func);
+
+	if (self) {
+		cw1200_spi_irq_unsubscribe(self);
+		if (self->core) {
+			cw1200_core_release(self->core);
+			self->core = NULL;
+		}
+		kfree(self);
+	}
+	cw1200_spi_off(func->dev.platform_data);
+
+	return 0;
+}
+
+static int cw1200_spi_suspend(struct device *dev, pm_message_t state)
+{
+	struct sbus_priv *self = spi_get_drvdata(to_spi_device(dev));
+
+	if (!cw1200_can_suspend(self->core))
+		return -EAGAIN;
+
+	/* XXX notify host that we have to keep CW1200 powered on? */
+	return 0;
+}
+
+static int cw1200_spi_resume(struct device *dev)
+{
+	return 0;
+}
+
+static struct spi_driver spi_driver = {
+	.probe		= cw1200_spi_probe,
+	.remove		= cw1200_spi_disconnect,
+	.driver = {
+		.name		= "cw1200_wlan_spi",
+		.bus            = &spi_bus_type,
+		.owner          = THIS_MODULE,
+		.suspend        = cw1200_spi_suspend,
+		.resume         = cw1200_spi_resume,
+	},
+};
+
+/* Init Module function -> Called by insmod */
+static int __init cw1200_spi_init(void)
+{
+	return spi_register_driver(&spi_driver);
+}
+
+/* Called at Driver Unloading */
+static void __exit cw1200_spi_exit(void)
+{
+	spi_unregister_driver(&spi_driver);
+}
+
+module_init(cw1200_spi_init);
+module_exit(cw1200_spi_exit);

drivers/net/wireless/cw1200/debug.c

+/*
+ * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
+ * DebugFS code
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include "cw1200.h"
+#include "debug.h"
+#include "fwio.h"
+
+/* join_status */
+static const char * const cw1200_debug_join_status[] = {
+	"passive",
+	"monitor",
+	"station (joining)",
+	"station (not authenticated yet)",
+	"station",
+	"adhoc",
+	"access point",
+};
+
+/* WSM_JOIN_PREAMBLE_... */
+static const char * const cw1200_debug_preamble[] = {
+	"long",
+	"short",
+	"long on 1 and 2 Mbps",
+};
+
+
+static const char * const cw1200_debug_link_id[] = {
+	"OFF",
+	"REQ",
+	"SOFT",
+	"HARD",
+};
+
+static const char *cw1200_debug_mode(int mode)
+{
+	switch (mode) {
+	case NL80211_IFTYPE_UNSPECIFIED:
+		return "unspecified";
+	case NL80211_IFTYPE_MONITOR:
+		return "monitor";
+	case NL80211_IFTYPE_STATION:
+		return "station";
+	case NL80211_IFTYPE_ADHOC:
+		return "adhoc";
+	case NL80211_IFTYPE_MESH_POINT:
+		return "mesh point";
+	case NL80211_IFTYPE_AP:
+		return "access point";
+	case NL80211_IFTYPE_P2P_CLIENT:
+		return "p2p client";
+	case NL80211_IFTYPE_P2P_GO:
+		return "p2p go";
+	default:
+		return "unsupported";
+	}
+}
+
+static void cw1200_queue_status_show(struct seq_file *seq,
+				     struct cw1200_queue *q)
+{
+	int i;
+	seq_printf(seq, "Queue       %d:\n", q->queue_id);
+	seq_printf(seq, "  capacity: %zu\n", q->capacity);
+	seq_printf(seq, "  queued:   %zu\n", q->num_queued);
+	seq_printf(seq, "  pending:  %zu\n", q->num_pending);
+	seq_printf(seq, "  sent:     %zu\n", q->num_sent);
+	seq_printf(seq, "  locked:   %s\n", q->tx_locked_cnt ? "yes" : "no");
+	seq_printf(seq, "  overfull: %s\n", q->overfull ? "yes" : "no");
+	seq_puts(seq,   "  link map: 0-> ");
+	for (i = 0; i < q->stats->map_capacity; ++i)
+		seq_printf(seq, "%.2d ", q->link_map_cache[i]);
+	seq_printf(seq, "<-%zu\n", q->stats->map_capacity);
+}
+
+static void cw1200_debug_print_map(struct seq_file *seq,
+				   struct cw1200_common *priv,
+				   const char *label,
+				   u32 map)
+{
+	int i;
+	seq_printf(seq, "%s0-> ", label);
+	for (i = 0; i < priv->tx_queue_stats.map_capacity; ++i)
+		seq_printf(seq, "%s ", (map & BIT(i)) ? "**" : "..");
+	seq_printf(seq, "<-%zu\n", priv->tx_queue_stats.map_capacity - 1);
+}
+
+static int cw1200_status_show(struct seq_file *seq, void *v)
+{
+	int i;
+	struct list_head *item;
+	struct cw1200_common *priv = seq->private;
+	struct cw1200_debug_priv *d = priv->debug;
+
+	seq_puts(seq,   "CW1200 Wireless LAN driver status\n");
+	seq_printf(seq, "Hardware:   %d.%d\n",
+		   priv->wsm_caps.hw_id,
+		   priv->wsm_caps.hw_subid);
+	seq_printf(seq, "Firmware:   %s %d.%d\n",
+		   cw1200_fw_types[priv->wsm_caps.fw_type],
+		   priv->wsm_caps.fw_ver,
+		   priv->wsm_caps.fw_build);
+	seq_printf(seq, "FW API:     %d\n",
+		   priv->wsm_caps.fw_api);
+	seq_printf(seq, "FW caps:    0x%.4X\n",
+		   priv->wsm_caps.fw_cap);
+	seq_printf(seq, "FW label:  '%s'\n",
+		   priv->wsm_caps.fw_label);
+	seq_printf(seq, "Mode:       %s%s\n",
+		   cw1200_debug_mode(priv->mode),
+		   priv->listening ? " (listening)" : "");
+	seq_printf(seq, "Join state: %s\n",
+		   cw1200_debug_join_status[priv->join_status]);
+	if (priv->channel)
+		seq_printf(seq, "Channel:    %d%s\n",
+			   priv->channel->hw_value,
+			   priv->channel_switch_in_progress ?
+			   " (switching)" : "");
+	if (priv->rx_filter.promiscuous)
+		seq_puts(seq,   "Filter:     promisc\n");
+	else if (priv->rx_filter.fcs)
+		seq_puts(seq,   "Filter:     fcs\n");
+	if (priv->rx_filter.bssid)
+		seq_puts(seq,   "Filter:     bssid\n");
+	if (!priv->disable_beacon_filter)
+		seq_puts(seq,   "Filter:     beacons\n");
+
+	if (priv->enable_beacon ||
+	    priv->mode == NL80211_IFTYPE_AP ||
+	    priv->mode == NL80211_IFTYPE_ADHOC ||
+	    priv->mode == NL80211_IFTYPE_MESH_POINT ||
+	    priv->mode == NL80211_IFTYPE_P2P_GO)
+		seq_printf(seq, "Beaconing:  %s\n",
+			   priv->enable_beacon ?
+			   "enabled" : "disabled");
+
+	for (i = 0; i < 4; ++i)
+		seq_printf(seq, "EDCA(%d):    %d, %d, %d, %d, %d\n", i,
+			   priv->edca.params[i].cwmin,
+			   priv->edca.params[i].cwmax,
+			   priv->edca.params[i].aifns,
+			   priv->edca.params[i].txop_limit,
+			   priv->edca.params[i].max_rx_lifetime);
+
+	if (priv->join_status == CW1200_JOIN_STATUS_STA) {
+		static const char *pm_mode = "unknown";
+		switch (priv->powersave_mode.mode) {
+		case WSM_PSM_ACTIVE:
+			pm_mode = "off";
+			break;
+		case WSM_PSM_PS:
+			pm_mode = "on";
+			break;
+		case WSM_PSM_FAST_PS:
+			pm_mode = "dynamic";
+			break;
+		}
+		seq_printf(seq, "Preamble:   %s\n",
+			   cw1200_debug_preamble[priv->association_mode.preamble]);
+		seq_printf(seq, "AMPDU spcn: %d\n",
+			   priv->association_mode.mpdu_start_spacing);
+		seq_printf(seq, "Basic rate: 0x%.8X\n",
+			   le32_to_cpu(priv->association_mode.basic_rate_set));
+		seq_printf(seq, "Bss lost:   %d beacons\n",
+			   priv->bss_params.beacon_lost_count);
+		seq_printf(seq, "AID:        %d\n",
+			   priv->bss_params.aid);
+		seq_printf(seq, "Rates:      0x%.8X\n",
+			   priv->bss_params.operational_rate_set);
+		seq_printf(seq, "Powersave:  %s\n", pm_mode);
+	}
+	seq_printf(seq, "HT:         %s\n",
+		   cw1200_is_ht(&priv->ht_info) ? "on" : "off");
+	if (cw1200_is_ht(&priv->ht_info)) {
+		seq_printf(seq, "Greenfield: %s\n",
+			   cw1200_ht_greenfield(&priv->ht_info) ? "yes" : "no");
+		seq_printf(seq, "AMPDU dens: %d\n",
+			   cw1200_ht_ampdu_density(&priv->ht_info));
+	}
+	seq_printf(seq, "RSSI thold: %d\n",
+		   priv->cqm_rssi_thold);
+	seq_printf(seq, "RSSI hyst:  %d\n",
+		   priv->cqm_rssi_hyst);
+	seq_printf(seq, "Long retr:  %d\n",
+		   priv->long_frame_max_tx_count);
+	seq_printf(seq, "Short retr: %d\n",
+		   priv->short_frame_max_tx_count);
+	spin_lock_bh(&priv->tx_policy_cache.lock);
+	i = 0;
+	list_for_each(item, &priv->tx_policy_cache.used)
+		++i;
+	spin_unlock_bh(&priv->tx_policy_cache.lock);
+	seq_printf(seq, "RC in use:  %d\n", i);
+
+	seq_puts(seq, "\n");
+	for (i = 0; i < 4; ++i) {
+		cw1200_queue_status_show(seq, &priv->tx_queue[i]);
+		seq_puts(seq, "\n");
+	}
+
+	cw1200_debug_print_map(seq, priv, "Link map:   ",
+			       priv->link_id_map);
+	cw1200_debug_print_map(seq, priv, "Asleep map: ",
+			       priv->sta_asleep_mask);
+	cw1200_debug_print_map(seq, priv, "PSPOLL map: ",
+			       priv->pspoll_mask);
+
+	seq_puts(seq, "\n");
+
+	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
+		if (priv->link_id_db[i].status) {
+			seq_printf(seq, "Link %d:     %s, %pM\n",
+				   i + 1,
+				   cw1200_debug_link_id[priv->link_id_db[i].status],
+				   priv->link_id_db[i].mac);
+		}
+	}
+
+	seq_puts(seq, "\n");
+
+	seq_printf(seq, "BH status:  %s\n",
+		   atomic_read(&priv->bh_term) ? "terminated" : "alive");
+	seq_printf(seq, "Pending RX: %d\n",
+		   atomic_read(&priv->bh_rx));
+	seq_printf(seq, "Pending TX: %d\n",
+		   atomic_read(&priv->bh_tx));
+	if (priv->bh_error)
+		seq_printf(seq, "BH errcode: %d\n",
+			   priv->bh_error);
+	seq_printf(seq, "TX bufs:    %d x %d bytes\n",
+		   priv->wsm_caps.input_buffers,
+		   priv->wsm_caps.input_buffer_size);
+	seq_printf(seq, "Used bufs:  %d\n",
+		   priv->hw_bufs_used);
+	seq_printf(seq, "Powermgmt:  %s\n",
+		   priv->powersave_enabled ? "on" : "off");
+	seq_printf(seq, "Device:     %s\n",
+		   priv->device_can_sleep ? "asleep" : "awake");
+
+	spin_lock(&priv->wsm_cmd.lock);
+	seq_printf(seq, "WSM status: %s\n",
+		   priv->wsm_cmd.done ? "idle" : "active");
+	seq_printf(seq, "WSM cmd:    0x%.4X (%td bytes)\n",
+		   priv->wsm_cmd.cmd, priv->wsm_cmd.len);
+	seq_printf(seq, "WSM retval: %d\n",
+		   priv->wsm_cmd.ret);
+	spin_unlock(&priv->wsm_cmd.lock);
+
+	seq_printf(seq, "Datapath:   %s\n",
+		   atomic_read(&priv->tx_lock) ? "locked" : "unlocked");
+	if (atomic_read(&priv->tx_lock))
+		seq_printf(seq, "TXlock cnt: %d\n",
+			   atomic_read(&priv->tx_lock));
+
+	seq_printf(seq, "TXed:       %d\n",
+		   d->tx);
+	seq_printf(seq, "AGG TXed:   %d\n",
+		   d->tx_agg);
+	seq_printf(seq, "MULTI TXed: %d (%d)\n",
+		   d->tx_multi, d->tx_multi_frames);
+	seq_printf(seq, "RXed:       %d\n",
+		   d->rx);
+	seq_printf(seq, "AGG RXed:   %d\n",
+		   d->rx_agg);
+	seq_printf(seq, "TX miss:    %d\n",
+		   d->tx_cache_miss);
+	seq_printf(seq, "TX align:   %d\n",
+		   d->tx_align);
+	seq_printf(seq, "TX burst:   %d\n",
+		   d->tx_burst);
+	seq_printf(seq, "TX TTL:     %d\n",
+		   d->tx_ttl);
+	seq_printf(seq, "Scan:       %s\n",
+		   atomic_read(&priv->scan.in_progress) ? "active" : "idle");
+
+	return 0;
+}
+
+static int cw1200_status_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, &cw1200_status_show,
+		inode->i_private);
+}
+
+static const struct file_operations fops_status = {
+	.open = cw1200_status_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.owner = THIS_MODULE,
+};
+
+static int cw1200_counters_show(struct seq_file *seq, void *v)
+{
+	int ret;
+	struct cw1200_common *priv = seq->private;
+	struct wsm_mib_counters_table counters;
+
+	ret = wsm_get_counters_table(priv, &counters);
+	if (ret)
+		return ret;
+
+#define PUT_COUNTER(tab, name) \
+	seq_printf(seq, "%s:" tab "%d\n", #name, \
+		__le32_to_cpu(counters.name))
+
+	PUT_COUNTER("\t\t", plcp_errors);
+	PUT_COUNTER("\t\t", fcs_errors);
+	PUT_COUNTER("\t\t", tx_packets);
+	PUT_COUNTER("\t\t", rx_packets);
+	PUT_COUNTER("\t\t", rx_packet_errors);
+	PUT_COUNTER("\t",   rx_decryption_failures);
+	PUT_COUNTER("\t\t", rx_mic_failures);
+	PUT_COUNTER("\t",   rx_no_key_failures);
+	PUT_COUNTER("\t",   tx_multicast_frames);
+	PUT_COUNTER("\t",   tx_frames_success);
+	PUT_COUNTER("\t",   tx_frame_failures);
+	PUT_COUNTER("\t",   tx_frames_retried);
+	PUT_COUNTER("\t",   tx_frames_multi_retried);
+	PUT_COUNTER("\t",   rx_frame_duplicates);
+	PUT_COUNTER("\t\t", rts_success);
+	PUT_COUNTER("\t\t", rts_failures);
+	PUT_COUNTER("\t\t", ack_failures);
+	PUT_COUNTER("\t",   rx_multicast_frames);
+	PUT_COUNTER("\t",   rx_frames_success);
+	PUT_COUNTER("\t",   rx_cmac_icv_errors);
+	PUT_COUNTER("\t\t", rx_cmac_replays);
+	PUT_COUNTER("\t",   rx_mgmt_ccmp_replays);
+
+#undef PUT_COUNTER
+
+	return 0;
+}
+
+static int cw1200_counters_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, &cw1200_counters_show,
+		inode->i_private);
+}
+
+static const struct file_operations fops_counters = {
+	.open = cw1200_counters_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.owner = THIS_MODULE,
+};
+
+static int cw1200_generic_open(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+#ifdef CONFIG_CW1200_ETF
+static int cw1200_etf_out_show(struct seq_file *seq, void *v)
+{
+	struct cw1200_common *priv = seq->private;
+	struct sk_buff *skb;
+	u32 len = 0;
+
+	skb = skb_dequeue(&priv->etf_q);
+
+	if (skb)
+		len = skb->len;
+
+	seq_write(seq, &len, sizeof(len));
+
+	if (skb) {
+		seq_write(seq, skb->data, len);
+		kfree_skb(skb);
+	}
+
+	return 0;
+}
+
+static int cw1200_etf_out_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, &cw1200_etf_out_show,
+			   inode->i_private);
+}
+
+static const struct file_operations fops_etf_out = {
+	.open = cw1200_etf_out_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.owner = THIS_MODULE,
+};
+
+struct etf_req_msg;
+static int etf_request(struct cw1200_common *priv,
+		       struct etf_req_msg *msg, u32 len);
+
+#define MAX_RX_SZE 2600
+
+struct etf_in_state {
+	struct cw1200_common *priv;
+	u32 total_len;
+	u8 buf[MAX_RX_SZE];
+	u32 written;
+};
+
+static int cw1200_etf_in_open(struct inode *inode, struct file *file)
+{
+	struct etf_in_state *etf = kmalloc(sizeof(struct etf_in_state),
+					   GFP_KERNEL);
+
+	if (!etf)
+		return -ENOMEM;
+
+	etf->written = 0;
+	etf->total_len = 0;
+	etf->priv = inode->i_private;
+
+	file->private_data = etf;
+
+	return 0;
+}
+
+static int cw1200_etf_in_release(struct inode *inode, struct file *file)
+{
+	kfree(file->private_data);
+	return 0;
+}
+
+static ssize_t cw1200_etf_in_write(struct file *file,
+	const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct etf_in_state *etf = file->private_data;
+
+	ssize_t written = 0;
+
+	if (!etf->total_len) {
+		if (count < sizeof(etf->total_len)) {
+			pr_err("count < sizeof(total_len)\n");
+			return -EINVAL;
+		}
+
+		if (copy_from_user(&etf->total_len, user_buf,
+				   sizeof(etf->total_len))) {
+			pr_err("copy_from_user (len) failed\n");
+			return -EFAULT;
+		}
+
+		written += sizeof(etf->total_len);
+		count -= sizeof(etf->total_len);
+	}
+
+	if (!count)
+		goto done;
+
+	if (copy_from_user(etf->buf + etf->written, user_buf + written,
+			   count)) {
+		pr_err("copy_from_user (payload %zu) failed\n", count);
+		return -EFAULT;
+	}
+
+	written += count;
+	etf->written += count;
+
+	if (etf->written >= etf->total_len) {
+		if (etf_request(etf->priv, (struct etf_req_msg *)etf->buf,
+				etf->total_len)) {
+			pr_err("etf_request failed\n");
+			return -EIO;
+		}
+	}
+
+done:
+	return written;
+}
+
+static const struct file_operations fops_etf_in = {
+	.open = cw1200_etf_in_open,
+	.release = cw1200_etf_in_release,
+	.write = cw1200_etf_in_write,
+	.llseek = default_llseek,
+	.owner = THIS_MODULE,
+};
+#endif /* CONFIG_CW1200_ETF */
+
+static ssize_t cw1200_wsm_dumps(struct file *file,
+	const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct cw1200_common *priv = file->private_data;
+	char buf[1];
+
+	if (!count)
+		return -EINVAL;
+	if (copy_from_user(buf, user_buf, 1))
+		return -EFAULT;
+
+	if (buf[0] == '1')
+		priv->wsm_enable_wsm_dumps = 1;
+	else
+		priv->wsm_enable_wsm_dumps = 0;
+
+	return count;
+}
+
+static const struct file_operations fops_wsm_dumps = {
+	.open = cw1200_generic_open,
+	.write = cw1200_wsm_dumps,
+	.llseek = default_llseek,
+};
+
+int cw1200_debug_init(struct cw1200_common *priv)
+{
+	int ret = -ENOMEM;
+	struct cw1200_debug_priv *d = kzalloc(sizeof(struct cw1200_debug_priv),
+			GFP_KERNEL);
+	priv->debug = d;
+	if (!d)
+		return ret;
+
+	d->debugfs_phy = debugfs_create_dir("cw1200",
+					    priv->hw->wiphy->debugfsdir);
+	if (!d->debugfs_phy)
+		goto err;
+
+	if (!debugfs_create_file("status", S_IRUSR, d->debugfs_phy,
+				 priv, &fops_status))
+		goto err;
+
+	if (!debugfs_create_file("counters", S_IRUSR, d->debugfs_phy,
+				 priv, &fops_counters))
+		goto err;
+
+#ifdef CONFIG_CW1200_ETF
+	if (etf_mode) {
+		skb_queue_head_init(&priv->etf_q);
+
+		if (!debugfs_create_file("etf_out", S_IRUSR, d->debugfs_phy,
+					 priv, &fops_etf_out))
+			goto err;
+		if (!debugfs_create_file("etf_in", S_IWUSR, d->debugfs_phy,
+					 priv, &fops_etf_in))
+			goto err;
+	}
+#endif /* CONFIG_CW1200_ETF */
+
+	if (!debugfs_create_file("wsm_dumps", S_IWUSR, d->debugfs_phy,
+				 priv, &fops_wsm_dumps))
+		goto err;
+
+	ret = cw1200_itp_init(priv);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	priv->debug = NULL;
+	debugfs_remove_recursive(d->debugfs_phy);
+	kfree(d);
+	return ret;
+}
+
+void cw1200_debug_release(struct cw1200_common *priv)
+{
+	struct cw1200_debug_priv *d = priv->debug;
+	if (d) {
+		cw1200_itp_release(priv);
+		priv->debug = NULL;
+		kfree(d);
+	}
+}
+
+#ifdef CONFIG_CW1200_ETF
+struct cw1200_sdd {
+	u8 id;
+	u8 len;
+	u8 data[];
+};
+
+struct etf_req_msg {
+	u32 id;
+	u32 len;
+	u8 data[];
+};
+
+static int parse_sdd_file(struct cw1200_common *priv, u8 *data, u32 length)
+{
+	struct cw1200_sdd *ie;
+
+	while (length > 0) {
+		ie = (struct cw1200_sdd *)data;
+		if (ie->id == SDD_REFERENCE_FREQUENCY_ELT_ID) {
+			priv->hw_refclk = cpu_to_le16(*((u16 *)ie->data));
+			pr_info("Using Reference clock frequency %d KHz\n",
+				priv->hw_refclk);
+			break;
+		}
+
+		length -= ie->len + sizeof(*ie);
+		data += ie->len + sizeof(*ie);
+	}
+	return 0;
+}
+
+char *etf_firmware;
+
+#define ST90TDS_START_ADAPTER           0x09 /* Loads firmware too */
+#define ST90TDS_STOP_ADAPTER            0x0A
+#define ST90TDS_CONFIG_ADAPTER          0x0E /* Send configuration params */
+#define ST90TDS_SBUS_READ               0x13
+#define ST90TDS_SBUS_WRITE              0x14
+#define ST90TDS_GET_DEVICE_OPTION       0x19
+#define ST90TDS_SET_DEVICE_OPTION       0x1A
+#define ST90TDS_SEND_SDD                0x1D /* SDD File used to find DPLL */
+
+#include "fwio.h"
+
+static int etf_request(struct cw1200_common *priv,
+		       struct etf_req_msg *msg,
+		       u32 len)
+{
+	int rval = -1;
+	switch (msg->id) {
+	case ST90TDS_START_ADAPTER:
+		etf_firmware = "cw1200_etf.bin";
+		pr_info("ETF_START (len %d, '%s')\n", len, etf_firmware);
+		rval = cw1200_load_firmware(priv);
+		break;
+	case ST90TDS_STOP_ADAPTER:
+		pr_info("ETF_STOP (unhandled)\n");
+		break;
+	case ST90TDS_SEND_SDD:
+		pr_info("ETF_SDD\n");
+		rval = parse_sdd_file(priv, msg->data, msg->len);
+		break;
+	case ST90TDS_CONFIG_ADAPTER:
+		pr_info("ETF_CONFIG_ADAP (unhandled)\n");
+		break;
+	case ST90TDS_SBUS_READ:
+		pr_info("ETF_SBUS_READ (unhandled)\n");
+		break;
+	case ST90TDS_SBUS_WRITE:
+		pr_info("ETF_SBUS_WRITE (unhandled)\n");
+		break;
+	case ST90TDS_SET_DEVICE_OPTION:
+		pr_info("ETF_SET_DEV_OPT (unhandled)\n");
+		break;
+	default:
+		pr_info("ETF_PASSTHRU (0x%08x)\n", msg->id);
+		rval = wsm_raw_cmd(priv, (u8 *)msg, len);
+		break;
+	}
+
+	return rval;
+}
+#endif /* CONFIG_CW1200_ETF */

drivers/net/wireless/cw1200/debug.h

+/*
+ * DebugFS code for ST-Ericsson CW1200 mac80211 driver
+ *
+ * Copyright (c) 2011, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_DEBUG_H_INCLUDED
+#define CW1200_DEBUG_H_INCLUDED
+
+#include "itp.h"
+
+struct cw1200_debug_priv {
+	struct dentry *debugfs_phy;
+	int tx;
+	int tx_agg;
+	int rx;
+	int rx_agg;
+	int tx_multi;
+	int tx_multi_frames;
+	int tx_cache_miss;
+	int tx_align;
+	int tx_ttl;
+	int tx_burst;
+	int ba_cnt;
+	int ba_acc;
+	int ba_cnt_rx;
+	int ba_acc_rx;
+#ifdef CONFIG_CW1200_ITP
+	struct cw1200_itp itp;
+#endif /* CONFIG_CW1200_ITP */
+};
+
+int cw1200_debug_init(struct cw1200_common *priv);
+void cw1200_debug_release(struct cw1200_common *priv);
+
+static inline void cw1200_debug_txed(struct cw1200_common *priv)
+{
+	++priv->debug->tx;
+}
+
+static inline void cw1200_debug_txed_agg(struct cw1200_common *priv)
+{
+	++priv->debug->tx_agg;
+}
+
+static inline void cw1200_debug_txed_multi(struct cw1200_common *priv,
+					   int count)
+{
+	++priv->debug->tx_multi;
+	priv->debug->tx_multi_frames += count;
+}
+
+static inline void cw1200_debug_rxed(struct cw1200_common *priv)
+{
+	++priv->debug->rx;
+}
+
+static inline void cw1200_debug_rxed_agg(struct cw1200_common *priv)
+{
+	++priv->debug->rx_agg;
+}
+
+static inline void cw1200_debug_tx_cache_miss(struct cw1200_common *priv)
+{
+	++priv->debug->tx_cache_miss;
+}
+
+static inline void cw1200_debug_tx_align(struct cw1200_common *priv)
+{
+	++priv->debug->tx_align;
+}
+
+static inline void cw1200_debug_tx_ttl(struct cw1200_common *priv)
+{
+	++priv->debug->tx_ttl;
+}
+
+static inline void cw1200_debug_tx_burst(struct cw1200_common *priv)
+{
+	++priv->debug->tx_burst;
+}
+
+static inline void cw1200_debug_ba(struct cw1200_common *priv,
+				   int ba_cnt, int ba_acc,
+				   int ba_cnt_rx, int ba_acc_rx)
+{
+	priv->debug->ba_cnt = ba_cnt;
+	priv->debug->ba_acc = ba_acc;
+	priv->debug->ba_cnt_rx = ba_cnt_rx;
+	priv->debug->ba_acc_rx = ba_acc_rx;
+}
+
+#endif /* CW1200_DEBUG_H_INCLUDED */

drivers/net/wireless/cw1200/fwio.c

+/*
+ * Firmware I/O code for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/firmware.h>
+
+#include "cw1200.h"
+#include "fwio.h"
+#include "hwio.h"
+#include "sbus.h"
+#include "bh.h"
+
+static int cw1200_get_hw_type(u32 config_reg_val, int *major_revision)
+{
+	int hw_type = -1;
+	u32 silicon_type = (config_reg_val >> 24) & 0x7;
+	u32 silicon_vers = (config_reg_val >> 31) & 0x1;
+
+	switch (silicon_type) {
+	case 0x00:
+		*major_revision = 1;
+		hw_type = HIF_9000_SILICON_VERSATILE;
+		break;
+	case 0x01:
+	case 0x02: /* CW1x00 */
+	case 0x04: /* CW1x60 */
+		*major_revision = silicon_type;
+		if (silicon_vers)
+			hw_type = HIF_8601_VERSATILE;
+		else
+			hw_type = HIF_8601_SILICON;
+		break;
+	default:
+		break;
+	}
+
+	return hw_type;
+}
+
+static int cw1200_load_firmware_cw1200(struct cw1200_common *priv)
+{
+	int ret, block, num_blocks;
+	unsigned i;
+	u32 val32;
+	u32 put = 0, get = 0;
+	u8 *buf = NULL;
+	const char *fw_path;
+	const struct firmware *firmware = NULL;
+
+	/* Macroses are local. */
+#define APB_WRITE(reg, val) \
+	do { \
+		ret = cw1200_apb_write_32(priv, CW1200_APB(reg), (val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define APB_READ(reg, val) \
+	do { \
+		ret = cw1200_apb_read_32(priv, CW1200_APB(reg), &(val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define REG_WRITE(reg, val) \
+	do { \
+		ret = cw1200_reg_write_32(priv, (reg), (val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+#define REG_READ(reg, val) \
+	do { \
+		ret = cw1200_reg_read_32(priv, (reg), &(val)); \
+		if (ret < 0) \
+			goto error; \
+	} while (0)
+
+	switch (priv->hw_revision) {
+	case CW1200_HW_REV_CUT10:
+		fw_path = FIRMWARE_CUT10;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_10;
+		break;
+	case CW1200_HW_REV_CUT11:
+		fw_path = FIRMWARE_CUT11;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_11;
+		break;
+	case CW1200_HW_REV_CUT20:
+		fw_path = FIRMWARE_CUT20;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_20;
+		break;
+	case CW1200_HW_REV_CUT22:
+		fw_path = FIRMWARE_CUT22;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_22;
+		break;
+	case CW1X60_HW_REV:
+		fw_path = FIRMWARE_CW1X60;
+		if (!priv->sdd_path)
+			priv->sdd_path = SDD_FILE_CW1X60;
+		break;
+	default:
+		pr_err("Invalid silicon revision %d.\n", priv->hw_revision);
+		return -EINVAL;
+	}
+
+	/* Initialize common registers */
+	APB_WRITE(DOWNLOAD_IMAGE_SIZE_REG, DOWNLOAD_ARE_YOU_HERE);
+	APB_WRITE(DOWNLOAD_PUT_REG, 0);
+	APB_WRITE(DOWNLOAD_GET_REG, 0);
+	APB_WRITE(DOWNLOAD_STATUS_REG, DOWNLOAD_PENDING);
+	APB_WRITE(DOWNLOAD_FLAGS_REG, 0);
+
+	/* Write the NOP Instruction */
+	REG_WRITE(ST90TDS_SRAM_BASE_ADDR_REG_ID, 0xFFF20000);
+	REG_WRITE(ST90TDS_AHB_DPORT_REG_ID, 0xEAFFFFFE);
+
+	/* Release CPU from RESET */
+	REG_READ(ST90TDS_CONFIG_REG_ID, val32);
+	val32 &= ~ST90TDS_CONFIG_CPU_RESET_BIT;
+	REG_WRITE(ST90TDS_CONFIG_REG_ID, val32);
+
+	/* Enable Clock */
+	val32 &= ~ST90TDS_CONFIG_CPU_CLK_DIS_BIT;
+	REG_WRITE(ST90TDS_CONFIG_REG_ID, val32);
+
+#ifdef CONFIG_CW1200_ETF
+	if (etf_mode)
+		fw_path = etf_firmware;
+#endif
+
+	/* Load a firmware file */
+	ret = request_firmware(&firmware, fw_path, priv->pdev);
+	if (ret) {
+		pr_err("Can't load firmware file %s.\n", fw_path);
+		goto error;
+	}
+
+	buf = kmalloc(DOWNLOAD_BLOCK_SIZE, GFP_KERNEL | GFP_DMA);
+	if (!buf) {
+		pr_err("Can't allocate firmware load buffer.\n");
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	/* Check if the bootloader is ready */
+	for (i = 0; i < 100; i += 1 + i / 2) {
+		APB_READ(DOWNLOAD_IMAGE_SIZE_REG, val32);
+		if (val32 == DOWNLOAD_I_AM_HERE)
+			break;
+		mdelay(i);
+	} /* End of for loop */
+
+	if (val32 != DOWNLOAD_I_AM_HERE) {
+		pr_err("Bootloader is not ready.\n");
+		ret = -ETIMEDOUT;
+		goto error;
+	}
+
+	/* Calculcate number of download blocks */
+	num_blocks = (firmware->size - 1) / DOWNLOAD_BLOCK_SIZE + 1;
+
+	/* Updating the length in Download Ctrl Area */
+	val32 = firmware->size; /* Explicit cast from size_t to u32 */
+	APB_WRITE(DOWNLOAD_IMAGE_SIZE_REG, val32);
+
+	/* Firmware downloading loop */
+	for (block = 0; block < num_blocks; block++) {
+		size_t tx_size;
+		size_t block_size;
+
+		/* check the download status */
+		APB_READ(DOWNLOAD_STATUS_REG, val32);
+		if (val32 != DOWNLOAD_PENDING) {
+			pr_err("Bootloader reported error %d.\n", val32);
+			ret = -EIO;
+			goto error;
+		}
+
+		/* loop until put - get <= 24K */
+		for (i = 0; i < 100; i++) {
+			APB_READ(DOWNLOAD_GET_REG, get);
+			if ((put - get) <=
+			    (DOWNLOAD_FIFO_SIZE - DOWNLOAD_BLOCK_SIZE))
+				break;
+			mdelay(i);
+		}
+
+		if ((put - get) > (DOWNLOAD_FIFO_SIZE - DOWNLOAD_BLOCK_SIZE)) {
+			pr_err("Timeout waiting for FIFO.\n");
+			ret = -ETIMEDOUT;
+			goto error;
+		}
+
+		/* calculate the block size */
+		tx_size = block_size = min((size_t)(firmware->size - put),
+			(size_t)DOWNLOAD_BLOCK_SIZE);
+
+		memcpy(buf, &firmware->data[put], block_size);
+		if (block_size < DOWNLOAD_BLOCK_SIZE) {
+			memset(&buf[block_size], 0,
+			       DOWNLOAD_BLOCK_SIZE - block_size);
+			tx_size = DOWNLOAD_BLOCK_SIZE;
+		}
+
+		/* send the block to sram */
+		ret = cw1200_apb_write(priv,
+			CW1200_APB(DOWNLOAD_FIFO_OFFSET +
+				   (put & (DOWNLOAD_FIFO_SIZE - 1))),
+			buf, tx_size);
+		if (ret < 0) {
+			pr_err("Can't write firmware block @ %d!\n",
+			       put & (DOWNLOAD_FIFO_SIZE - 1));
+			goto error;
+		}
+
+		/* update the put register */
+		put += block_size;
+		APB_WRITE(DOWNLOAD_PUT_REG, put);
+	} /* End of firmware download loop */
+
+	/* Wait for the download completion */
+	for (i = 0; i < 300; i += 1 + i / 2) {
+		APB_READ(DOWNLOAD_STATUS_REG, val32);
+		if (val32 != DOWNLOAD_PENDING)
+			break;
+		mdelay(i);
+	}
+	if (val32 != DOWNLOAD_SUCCESS) {
+		pr_err("Wait for download completion failed: 0x%.8X\n", val32);
+		ret = -ETIMEDOUT;
+		goto error;
+	} else {
+		pr_info("Firmware download completed.\n");
+		ret = 0;
+	}
+
+error:
+	kfree(buf);
+	if (firmware)
+		release_firmware(firmware);
+	return ret;
+
+#undef APB_WRITE
+#undef APB_READ
+#undef REG_WRITE
+#undef REG_READ
+}
+
+
+static int config_reg_read(struct cw1200_common *priv, u32 *val)
+{
+	switch (priv->hw_type) {
+	case HIF_9000_SILICON_VERSATILE: {
+		u16 val16;
+		int ret = cw1200_reg_read_16(priv,
+					     ST90TDS_CONFIG_REG_ID,
+					     &val16);
+		if (ret < 0)
+			return ret;
+		*val = val16;
+		return 0;
+	}
+	case HIF_8601_VERSATILE:
+	case HIF_8601_SILICON:
+	default:
+		cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, val);
+		break;
+	}
+	return 0;
+}
+
+static int config_reg_write(struct cw1200_common *priv, u32 val)
+{
+	switch (priv->hw_type) {
+	case HIF_9000_SILICON_VERSATILE:
+		return cw1200_reg_write_16(priv,
+					   ST90TDS_CONFIG_REG_ID,
+					   (u16)val);
+	case HIF_8601_VERSATILE:
+	case HIF_8601_SILICON:
+	default:
+		return cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID, val);
+		break;
+	}
+	return 0;
+}
+
+int cw1200_load_firmware(struct cw1200_common *priv)
+{
+	int ret;
+	int i;
+	u32 val32;
+	u16 val16;
+	int major_revision = -1;
+
+	/* Read CONFIG Register */
+	ret = cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto out;
+	}
+
+	if (val32 == 0 || val32 == 0xffffffff) {
+		pr_err("Bad config register value (0x%08x)\n", val32);
+		ret = -EIO;
+		goto out;
+	}
+
+	priv->hw_type = cw1200_get_hw_type(val32, &major_revision);
+	if (priv->hw_type < 0) {
+		pr_err("Can't deduce hardware type.\n");
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	/* Set DPLL Reg value, and read back to confirm writes work */
+	ret = cw1200_reg_write_32(priv, ST90TDS_TSET_GEN_R_W_REG_ID,
+				  cw1200_dpll_from_clk(priv->hw_refclk));
+	if (ret < 0) {
+		pr_err("Can't write DPLL register.\n");
+		goto out;
+	}
+
+	msleep(20);
+
+	ret = cw1200_reg_read_32(priv,
+		ST90TDS_TSET_GEN_R_W_REG_ID, &val32);
+	if (ret < 0) {
+		pr_err("Can't read DPLL register.\n");
+		goto out;
+	}
+
+	if (val32 != cw1200_dpll_from_clk(priv->hw_refclk)) {
+		pr_err("Unable to initialise DPLL register. Wrote 0x%.8X, Read 0x%.8X.\n",
+		       cw1200_dpll_from_clk(priv->hw_refclk), val32);
+		ret = -EIO;
+		goto out;
+	}
+
+	/* Set wakeup bit in device */
+	ret = cw1200_reg_read_16(priv, ST90TDS_CONTROL_REG_ID, &val16);
+	if (ret < 0) {
+		pr_err("set_wakeup: can't read control register.\n");
+		goto out;
+	}
+
+	ret = cw1200_reg_write_16(priv, ST90TDS_CONTROL_REG_ID,
+		val16 | ST90TDS_CONT_WUP_BIT);
+	if (ret < 0) {
+		pr_err("set_wakeup: can't write control register.\n");
+		goto out;
+	}
+
+	/* Wait for wakeup */
+	for (i = 0; i < 300; i += (1 + i / 2)) {
+		ret = cw1200_reg_read_16(priv,
+			ST90TDS_CONTROL_REG_ID, &val16);
+		if (ret < 0) {
+			pr_err("wait_for_wakeup: can't read control register.\n");
+			goto out;
+		}
+
+		if (val16 & ST90TDS_CONT_RDY_BIT)
+			break;
+
+		msleep(i);
+	}
+
+	if ((val16 & ST90TDS_CONT_RDY_BIT) == 0) {
+		pr_err("wait_for_wakeup: device is not responding.\n");
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	switch (major_revision) {
+	case 1:
+		/* CW1200 Hardware detection logic : Check for CUT1.1 */
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT_ID_ADDR, &val32);
+		if (ret) {
+			pr_err("HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		switch (val32) {
+		case CW1200_CUT_11_ID_STR:
+			pr_info("CW1x00 Cut 1.1 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT11;
+			break;
+		default:
+			pr_info("CW1x00 Cut 1.0 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT10;
+			break;
+		}
+
+		/* According to ST-E, CUT<2.0 has busted BA TID0-3.
+		   Just disable it entirely...
+		*/
+		priv->ba_rx_tid_mask = 0;
+		priv->ba_tx_tid_mask = 0;
+		break;
+	case 2: {
+		u32 ar1, ar2, ar3;
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR, &ar1);
+		if (ret) {
+			pr_err("(1) HW detection: can't read CUT ID\n");
+			goto out;
+		}
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR + 4, &ar2);
+		if (ret) {
+			pr_err("(2) HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		ret = cw1200_ahb_read_32(priv, CW1200_CUT2_ID_ADDR + 8, &ar3);
+		if (ret) {
+			pr_err("(3) HW detection: can't read CUT ID.\n");
+			goto out;
+		}
+
+		if (ar1 == CW1200_CUT_22_ID_STR1 &&
+		    ar2 == CW1200_CUT_22_ID_STR2 &&
+		    ar3 == CW1200_CUT_22_ID_STR3) {
+			pr_info("CW1x00 Cut 2.2 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT22;
+		} else {
+			pr_info("CW1x00 Cut 2.0 silicon detected.\n");
+			priv->hw_revision = CW1200_HW_REV_CUT20;
+		}
+		break;
+	}
+	case 4:
+		pr_info("CW1x60 silicon detected.\n");
+		priv->hw_revision = CW1X60_HW_REV;
+		break;
+	default:
+		pr_err("Unsupported silicon major revision %d.\n",
+		       major_revision);
+		ret = -ENOTSUPP;
+		goto out;
+	}
+
+	/* Checking for access mode */
+	ret = config_reg_read(priv, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto out;
+	}
+
+	if (!(val32 & ST90TDS_CONFIG_ACCESS_MODE_BIT)) {
+		pr_err("Device is already in QUEUE mode!\n");
+			ret = -EINVAL;
+			goto out;
+	}
+
+	switch (priv->hw_type)  {
+	case HIF_8601_SILICON:
+		if (priv->hw_revision == CW1X60_HW_REV) {
+			pr_err("Can't handle CW1160/1260 firmware load yet.\n");
+			ret = -ENOTSUPP;
+			goto out;
+		}
+		ret = cw1200_load_firmware_cw1200(priv);
+		break;
+	default:
+		pr_err("Can't perform firmware load for hw type %d.\n",
+		       priv->hw_type);
+		ret = -ENOTSUPP;
+		goto out;
+	}
+	if (ret < 0) {
+		pr_err("Firmware load error.\n");
+		goto out;
+	}
+
+	/* Enable interrupt signalling */
+	priv->sbus_ops->lock(priv->sbus_priv);
+	ret = __cw1200_irq_enable(priv, 1);
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	if (ret < 0)
+		goto unsubscribe;
+
+	/* Configure device for MESSSAGE MODE */
+	ret = config_reg_read(priv, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto unsubscribe;
+	}
+	ret = config_reg_write(priv, val32 & ~ST90TDS_CONFIG_ACCESS_MODE_BIT);
+	if (ret < 0) {
+		pr_err("Can't write config register.\n");
+		goto unsubscribe;
+	}
+
+	/* Unless we read the CONFIG Register we are
+	 * not able to get an interrupt
+	 */
+	mdelay(10);
+	config_reg_read(priv, &val32);
+
+out:
+	return ret;
+
+unsubscribe:
+	/* Disable interrupt signalling */
+	priv->sbus_ops->lock(priv->sbus_priv);
+	ret = __cw1200_irq_enable(priv, 0);
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}

drivers/net/wireless/cw1200/fwio.h

+/*
+ * Firmware API for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef FWIO_H_INCLUDED
+#define FWIO_H_INCLUDED
+
+#define BOOTLOADER_CW1X60       "boot_cw1x60.bin"
+#define FIRMWARE_CW1X60		"wsm_cw1x60.bin"
+#define FIRMWARE_CUT22		"wsm_22.bin"
+#define FIRMWARE_CUT20		"wsm_20.bin"
+#define FIRMWARE_CUT11		"wsm_11.bin"
+#define FIRMWARE_CUT10		"wsm_10.bin"
+#define SDD_FILE_CW1X60		"sdd_cw1x60.bin"
+#define SDD_FILE_22		"sdd_22.bin"
+#define SDD_FILE_20		"sdd_20.bin"
+#define SDD_FILE_11		"sdd_11.bin"
+#define SDD_FILE_10		"sdd_10.bin"
+
+int cw1200_load_firmware(struct cw1200_common *priv);
+
+/* SDD definitions */
+#define SDD_PTA_CFG_ELT_ID 0xEB
+#define SDD_REFERENCE_FREQUENCY_ELT_ID 0xc5
+u32 cw1200_dpll_from_clk(u16 clk);
+
+#endif

drivers/net/wireless/cw1200/hwio.c

+/*
+ * Low-level device IO routines for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver, which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/types.h>
+
+#include "cw1200.h"
+#include "hwio.h"
+#include "sbus.h"
+
+ /* Sdio addr is 4*spi_addr */
+#define SPI_REG_ADDR_TO_SDIO(spi_reg_addr) ((spi_reg_addr) << 2)
+#define SDIO_ADDR17BIT(buf_id, mpf, rfu, reg_id_ofs) \
+				((((buf_id)    & 0x1F) << 7) \
+				| (((mpf)        & 1) << 6) \
+				| (((rfu)        & 1) << 5) \
+				| (((reg_id_ofs) & 0x1F) << 0))
+#define MAX_RETRY		3
+
+
+static int __cw1200_reg_read(struct cw1200_common *priv, u16 addr,
+			     void *buf, size_t buf_len, int buf_id)
+{
+	u16 addr_sdio;
+	u32 sdio_reg_addr_17bit;
+
+	/* Check if buffer is aligned to 4 byte boundary */
+	if (WARN_ON(((unsigned long)buf & 3) && (buf_len > 4))) {
+		pr_err("buffer is not aligned.\n");
+		return -EINVAL;
+	}
+
+	/* Convert to SDIO Register Address */
+	addr_sdio = SPI_REG_ADDR_TO_SDIO(addr);
+	sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio);
+
+	return priv->sbus_ops->sbus_memcpy_fromio(priv->sbus_priv,
+						  sdio_reg_addr_17bit,
+						  buf, buf_len);
+}
+
+static int __cw1200_reg_write(struct cw1200_common *priv, u16 addr,
+				const void *buf, size_t buf_len, int buf_id)
+{
+	u16 addr_sdio;
+	u32 sdio_reg_addr_17bit;
+
+	/* Convert to SDIO Register Address */
+	addr_sdio = SPI_REG_ADDR_TO_SDIO(addr);
+	sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio);
+
+	return priv->sbus_ops->sbus_memcpy_toio(priv->sbus_priv,
+						sdio_reg_addr_17bit,
+						buf, buf_len);
+}
+
+static inline int __cw1200_reg_read_32(struct cw1200_common *priv,
+					u16 addr, u32 *val)
+{
+	int i = __cw1200_reg_read(priv, addr, val, sizeof(*val), 0);
+	*val = le32_to_cpu(*val);
+	return i;
+}
+
+static inline int __cw1200_reg_write_32(struct cw1200_common *priv,
+					u16 addr, u32 val)
+{
+	val = cpu_to_le32(val);
+	return __cw1200_reg_write(priv, addr, &val, sizeof(val), 0);
+}
+
+static inline int __cw1200_reg_read_16(struct cw1200_common *priv,
+					u16 addr, u16 *val)
+{
+	int i = __cw1200_reg_read(priv, addr, val, sizeof(*val), 0);
+	*val = le16_to_cpu(*val);
+	return i;
+}
+
+static inline int __cw1200_reg_write_16(struct cw1200_common *priv,
+					u16 addr, u16 val)
+{
+	val = cpu_to_le16(val);
+	return __cw1200_reg_write(priv, addr, &val, sizeof(val), 0);
+}
+
+int cw1200_reg_read(struct cw1200_common *priv, u16 addr, void *buf,
+			size_t buf_len)
+{
+	int ret;
+	priv->sbus_ops->lock(priv->sbus_priv);
+	ret = __cw1200_reg_read(priv, addr, buf, buf_len, 0);
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int cw1200_reg_write(struct cw1200_common *priv, u16 addr, const void *buf,
+			size_t buf_len)
+{
+	int ret;
+	priv->sbus_ops->lock(priv->sbus_priv);
+	ret = __cw1200_reg_write(priv, addr, buf, buf_len, 0);
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int cw1200_data_read(struct cw1200_common *priv, void *buf, size_t buf_len)
+{
+	int ret, retry = 1;
+	int buf_id_rx = priv->buf_id_rx;
+
+	priv->sbus_ops->lock(priv->sbus_priv);
+
+	while (retry <= MAX_RETRY) {
+		ret = __cw1200_reg_read(priv,
+					ST90TDS_IN_OUT_QUEUE_REG_ID, buf,
+					buf_len, buf_id_rx + 1);
+		if (!ret) {
+			buf_id_rx = (buf_id_rx + 1) & 3;
+			priv->buf_id_rx = buf_id_rx;
+			break;
+		} else {
+			retry++;
+			mdelay(1);
+			pr_err("error :[%d]\n", ret);
+		}
+	}
+
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int cw1200_data_write(struct cw1200_common *priv, const void *buf,
+			size_t buf_len)
+{
+	int ret, retry = 1;
+	int buf_id_tx = priv->buf_id_tx;
+
+	priv->sbus_ops->lock(priv->sbus_priv);
+
+	while (retry <= MAX_RETRY) {
+		ret = __cw1200_reg_write(priv,
+					 ST90TDS_IN_OUT_QUEUE_REG_ID, buf,
+					 buf_len, buf_id_tx);
+		if (!ret) {
+			buf_id_tx = (buf_id_tx + 1) & 31;
+			priv->buf_id_tx = buf_id_tx;
+			break;
+		} else {
+			retry++;
+			mdelay(1);
+			pr_err("error :[%d]\n", ret);
+		}
+	}
+
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int cw1200_indirect_read(struct cw1200_common *priv, u32 addr, void *buf,
+			 size_t buf_len, u32 prefetch, u16 port_addr)
+{
+	u32 val32 = 0;
+	int i, ret;
+
+	if ((buf_len / 2) >= 0x1000) {
+		pr_err("Can't read more than 0xfff words.\n");
+		return -EINVAL;
+		goto out;
+	}
+
+	priv->sbus_ops->lock(priv->sbus_priv);
+	/* Write address */
+	ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr);
+	if (ret < 0) {
+		pr_err("Can't write address register.\n");
+		goto out;
+	}
+
+	/* Read CONFIG Register Value - We will read 32 bits */
+	ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
+	if (ret < 0) {
+		pr_err("Can't read config register.\n");
+		goto out;
+	}
+
+	/* Set PREFETCH bit */
+	ret = __cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID,
+					val32 | prefetch);
+	if (ret < 0) {
+		pr_err("Can't write prefetch bit.\n");
+		goto out;
+	}
+
+	/* Check for PRE-FETCH bit to be cleared */
+	for (i = 0; i < 20; i++) {
+		ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
+		if (ret < 0) {
+			pr_err("Can't check prefetch bit.\n");
+			goto out;
+		}
+		if (!(val32 & prefetch))
+			break;
+
+		mdelay(i);
+	}
+
+	if (val32 & prefetch) {
+		pr_err("Prefetch bit is not cleared.\n");
+		goto out;
+	}
+
+	/* Read data port */
+	ret = __cw1200_reg_read(priv, port_addr, buf, buf_len, 0);
+	if (ret < 0) {
+		pr_err("Can't read data port.\n");
+		goto out;
+	}
+
+out:
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int cw1200_apb_write(struct cw1200_common *priv, u32 addr, const void *buf,
+			size_t buf_len)
+{
+	int ret;
+
+	if ((buf_len / 2) >= 0x1000) {
+		pr_err("Can't write more than 0xfff words.\n");
+		return -EINVAL;
+	}
+
+	priv->sbus_ops->lock(priv->sbus_priv);
+
+	/* Write address */
+	ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr);
+	if (ret < 0) {
+		pr_err("Can't write address register.\n");
+		goto out;
+	}
+
+	/* Write data port */
+	ret = __cw1200_reg_write(priv, ST90TDS_SRAM_DPORT_REG_ID,
+					buf, buf_len, 0);
+	if (ret < 0) {
+		pr_err("Can't write data port.\n");
+		goto out;
+	}
+
+out:
+	priv->sbus_ops->unlock(priv->sbus_priv);
+	return ret;
+}
+
+int __cw1200_irq_enable(struct cw1200_common *priv, int enable)
+{
+	u32 val32;
+	u16 val16;
+	int ret;
+
+	if (HIF_8601_SILICON == priv->hw_type) {
+		ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
+		if (ret < 0) {
+			pr_err("Can't read config register.\n");
+			return ret;
+		}
+
+		if (enable)
+			val32 |= ST90TDS_CONF_IRQ_RDY_ENABLE;
+		else
+			val32 &= ~ST90TDS_CONF_IRQ_RDY_ENABLE;
+
+		ret = __cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID, val32);
+		if (ret < 0) {
+			pr_err("Can't write config register.\n");
+			return ret;
+		}
+	} else {
+		ret = __cw1200_reg_read_16(priv, ST90TDS_CONFIG_REG_ID, &val16);
+		if (ret < 0) {
+			pr_err("Can't read control register.\n");
+			return ret;
+		}
+
+		if (enable)
+			val16 |= ST90TDS_CONT_IRQ_RDY_ENABLE;
+		else
+			val16 &= ~ST90TDS_CONT_IRQ_RDY_ENABLE;
+
+		ret = __cw1200_reg_write_16(priv, ST90TDS_CONFIG_REG_ID, val16);
+		if (ret < 0) {
+			pr_err("Can't write control register.\n");
+			return ret;
+		}
+	}
+	return 0;
+}

drivers/net/wireless/cw1200/hwio.h

+/*
+ * Low-level API for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * ST-Ericsson UMAC CW1200 driver which is
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Ajitpal Singh <ajitpal.singh@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_HWIO_H_INCLUDED
+#define CW1200_HWIO_H_INCLUDED
+
+/* extern */ struct cw1200_common;
+
+#define CW1200_CUT_11_ID_STR		(0x302E3830)
+#define CW1200_CUT_22_ID_STR1		(0x302e3132)
+#define CW1200_CUT_22_ID_STR2		(0x32302e30)
+#define CW1200_CUT_22_ID_STR3		(0x3335)
+#define CW1200_CUT_ID_ADDR		(0xFFF17F90)
+#define CW1200_CUT2_ID_ADDR		(0xFFF1FF90)
+
+/* Download control area */
+/* boot loader start address in SRAM */
+#define DOWNLOAD_BOOT_LOADER_OFFSET	(0x00000000)
+/* 32K, 0x4000 to 0xDFFF */
+#define DOWNLOAD_FIFO_OFFSET		(0x00004000)
+/* 32K */
+#define DOWNLOAD_FIFO_SIZE		(0x00008000)
+/* 128 bytes, 0xFF80 to 0xFFFF */
+#define DOWNLOAD_CTRL_OFFSET		(0x0000FF80)
+#define DOWNLOAD_CTRL_DATA_DWORDS	(32-6)
+
+struct download_cntl_t {
+	/* size of whole firmware file (including Cheksum), host init */
+	u32 image_size;
+	/* downloading flags */
+	u32 flags;
+	/* No. of bytes put into the download, init & updated by host */
+	u32 put;
+	/* last traced program counter, last ARM reg_pc */
+	u32 trace_pc;
+	/* No. of bytes read from the download, host init, device updates */
+	u32 get;
+	/* r0, boot losader status, host init to pending, device updates */
+	u32 status;
+	/* Extra debug info, r1 to r14 if status=r0=DOWNLOAD_EXCEPTION */
+	u32 debug_data[DOWNLOAD_CTRL_DATA_DWORDS];
+};
+
+#define	DOWNLOAD_IMAGE_SIZE_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, image_size))
+#define	DOWNLOAD_FLAGS_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, flags))
+#define DOWNLOAD_PUT_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, put))
+#define DOWNLOAD_TRACE_PC_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, trace_pc))
+#define	DOWNLOAD_GET_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, get))
+#define	DOWNLOAD_STATUS_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, status))
+#define DOWNLOAD_DEBUG_DATA_REG		\
+	(DOWNLOAD_CTRL_OFFSET + offsetof(struct download_cntl_t, debug_data))
+#define DOWNLOAD_DEBUG_DATA_LEN		(108)
+
+#define DOWNLOAD_BLOCK_SIZE		(1024)
+
+/* For boot loader detection */
+#define DOWNLOAD_ARE_YOU_HERE		(0x87654321)
+#define DOWNLOAD_I_AM_HERE		(0x12345678)
+
+/* Download error code */
+#define DOWNLOAD_PENDING		(0xFFFFFFFF)
+#define DOWNLOAD_SUCCESS		(0)
+#define DOWNLOAD_EXCEPTION		(1)
+#define DOWNLOAD_ERR_MEM_1		(2)
+#define DOWNLOAD_ERR_MEM_2		(3)
+#define DOWNLOAD_ERR_SOFTWARE		(4)
+#define DOWNLOAD_ERR_FILE_SIZE		(5)
+#define DOWNLOAD_ERR_CHECKSUM		(6)
+#define DOWNLOAD_ERR_OVERFLOW		(7)
+#define DOWNLOAD_ERR_IMAGE		(8)
+#define DOWNLOAD_ERR_HOST		(9)
+#define DOWNLOAD_ERR_ABORT		(10)
+
+
+#define SYS_BASE_ADDR_SILICON		(0)
+#define PAC_BASE_ADDRESS_SILICON	(SYS_BASE_ADDR_SILICON + 0x09000000)
+#define PAC_SHARED_MEMORY_SILICON	(PAC_BASE_ADDRESS_SILICON)
+
+#define CW1200_APB(addr)		(PAC_SHARED_MEMORY_SILICON + (addr))
+
+/* ***************************************************************
+*Device register definitions
+*************************************************************** */
+/* WBF - SPI Register Addresses */
+#define ST90TDS_ADDR_ID_BASE		(0x0000)
+/* 16/32 bits */
+#define ST90TDS_CONFIG_REG_ID		(0x0000)
+/* 16/32 bits */
+#define ST90TDS_CONTROL_REG_ID		(0x0001)
+/* 16 bits, Q mode W/R */
+#define ST90TDS_IN_OUT_QUEUE_REG_ID	(0x0002)
+/* 32 bits, AHB bus R/W */
+#define ST90TDS_AHB_DPORT_REG_ID	(0x0003)
+/* 16/32 bits */
+#define ST90TDS_SRAM_BASE_ADDR_REG_ID   (0x0004)
+/* 32 bits, APB bus R/W */
+#define ST90TDS_SRAM_DPORT_REG_ID	(0x0005)
+/* 32 bits, t_settle/general */
+#define ST90TDS_TSET_GEN_R_W_REG_ID	(0x0006)
+/* 16 bits, Q mode read, no length */
+#define ST90TDS_FRAME_OUT_REG_ID	(0x0007)
+#define ST90TDS_ADDR_ID_MAX		(ST90TDS_FRAME_OUT_REG_ID)
+
+/* WBF - Control register bit set */
+/* next o/p length, bit 11 to 0 */
+#define ST90TDS_CONT_NEXT_LEN_MASK	(0x0FFF)
+#define ST90TDS_CONT_WUP_BIT		(BIT(12))
+#define ST90TDS_CONT_RDY_BIT		(BIT(13))
+#define ST90TDS_CONT_IRQ_ENABLE		(BIT(14))
+#define ST90TDS_CONT_RDY_ENABLE		(BIT(15))
+#define ST90TDS_CONT_IRQ_RDY_ENABLE	(BIT(14)|BIT(15))
+
+/* SPI Config register bit set */
+#define ST90TDS_CONFIG_FRAME_BIT	(BIT(2))
+#define ST90TDS_CONFIG_WORD_MODE_BITS	(BIT(3)|BIT(4))
+#define ST90TDS_CONFIG_WORD_MODE_1	(BIT(3))
+#define ST90TDS_CONFIG_WORD_MODE_2	(BIT(4))
+#define ST90TDS_CONFIG_ERROR_0_BIT	(BIT(5))
+#define ST90TDS_CONFIG_ERROR_1_BIT	(BIT(6))
+#define ST90TDS_CONFIG_ERROR_2_BIT	(BIT(7))
+/* TBD: Sure??? */
+#define ST90TDS_CONFIG_CSN_FRAME_BIT	(BIT(7))
+#define ST90TDS_CONFIG_ERROR_3_BIT	(BIT(8))
+#define ST90TDS_CONFIG_ERROR_4_BIT	(BIT(9))
+/* QueueM */
+#define ST90TDS_CONFIG_ACCESS_MODE_BIT	(BIT(10))
+/* AHB bus */
+#define ST90TDS_CONFIG_AHB_PRFETCH_BIT	(BIT(11))
+#define ST90TDS_CONFIG_CPU_CLK_DIS_BIT	(BIT(12))
+/* APB bus */
+#define ST90TDS_CONFIG_PRFETCH_BIT	(BIT(13))
+/* cpu reset */
+#define ST90TDS_CONFIG_CPU_RESET_BIT	(BIT(14))
+#define ST90TDS_CONFIG_CLEAR_INT_BIT	(BIT(15))
+
+/* For CW1200 the IRQ Enable and Ready Bits are in CONFIG register */
+#define ST90TDS_CONF_IRQ_ENABLE		(BIT(16))
+#define ST90TDS_CONF_RDY_ENABLE		(BIT(17))
+#define ST90TDS_CONF_IRQ_RDY_ENABLE	(BIT(16)|BIT(17))
+
+int cw1200_data_read(struct cw1200_common *priv,
+		     void *buf, size_t buf_len);
+int cw1200_data_write(struct cw1200_common *priv,
+		      const void *buf, size_t buf_len);
+
+int cw1200_reg_read(struct cw1200_common *priv, u16 addr,
+		    void *buf, size_t buf_len);
+int cw1200_reg_write(struct cw1200_common *priv, u16 addr,
+		     const void *buf, size_t buf_len);
+
+static inline int cw1200_reg_read_16(struct cw1200_common *priv,
+				     u16 addr, u16 *val)
+{
+	u32 tmp;
+	int i;
+	i = cw1200_reg_read(priv, addr, &tmp, sizeof(tmp));
+	tmp = le32_to_cpu(tmp);
+	*val = tmp & 0xffff;
+	return i;
+}
+
+static inline int cw1200_reg_write_16(struct cw1200_common *priv,
+				      u16 addr, u16 val)
+{
+	u32 tmp = val;
+	tmp = cpu_to_le32(tmp);
+	return cw1200_reg_write(priv, addr, &tmp, sizeof(tmp));
+}
+
+static inline int cw1200_reg_read_32(struct cw1200_common *priv,
+				     u16 addr, u32 *val)
+{
+	int i = cw1200_reg_read(priv, addr, val, sizeof(*val));
+	*val = le32_to_cpu(*val);
+	return i;
+}
+
+static inline int cw1200_reg_write_32(struct cw1200_common *priv,
+				      u16 addr, u32 val)
+{
+	val = cpu_to_le32(val);
+	return cw1200_reg_write(priv, addr, &val, sizeof(val));
+}
+
+int cw1200_indirect_read(struct cw1200_common *priv, u32 addr, void *buf,
+			 size_t buf_len, u32 prefetch, u16 port_addr);
+int cw1200_apb_write(struct cw1200_common *priv, u32 addr, const void *buf,
+		     size_t buf_len);
+
+static inline int cw1200_apb_read(struct cw1200_common *priv, u32 addr,
+				  void *buf, size_t buf_len)
+{
+	return cw1200_indirect_read(priv, addr, buf, buf_len,
+				    ST90TDS_CONFIG_PRFETCH_BIT,
+				    ST90TDS_SRAM_DPORT_REG_ID);
+}
+
+static inline int cw1200_ahb_read(struct cw1200_common *priv, u32 addr,
+				  void *buf, size_t buf_len)
+{
+	return cw1200_indirect_read(priv, addr, buf, buf_len,
+				    ST90TDS_CONFIG_AHB_PRFETCH_BIT,
+				    ST90TDS_AHB_DPORT_REG_ID);
+}
+
+static inline int cw1200_apb_read_32(struct cw1200_common *priv,
+				     u32 addr, u32 *val)
+{
+	int i = cw1200_apb_read(priv, addr, val, sizeof(*val));
+	*val = le32_to_cpu(*val);
+	return i;
+}
+
+static inline int cw1200_apb_write_32(struct cw1200_common *priv,
+				      u32 addr, u32 val)
+{
+	val = cpu_to_le32(val);
+	return cw1200_apb_write(priv, addr, &val, sizeof(val));
+}
+static inline int cw1200_ahb_read_32(struct cw1200_common *priv,
+				     u32 addr, u32 *val)
+{
+	int i = cw1200_ahb_read(priv, addr, val, sizeof(*val));
+	*val = le32_to_cpu(*val);
+	return i;
+}
+
+#endif /* CW1200_HWIO_H_INCLUDED */

drivers/net/wireless/cw1200/itp.c

+/*
+ * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
+ * ITP code
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/poll.h>
+#include <linux/time.h>
+#include <linux/random.h>
+#include <linux/kallsyms.h>
+#include <net/mac80211.h>
+#include "cw1200.h"
+#include "debug.h"
+#include "itp.h"
+#include "sta.h"
+
+static int __cw1200_itp_open(struct cw1200_common *priv);
+static int __cw1200_itp_close(struct cw1200_common *priv);
+static void cw1200_itp_rx_start(struct cw1200_common *priv);
+static void cw1200_itp_rx_stop(struct cw1200_common *priv);
+static void cw1200_itp_rx_stats(struct cw1200_common *priv);
+static void cw1200_itp_rx_reset(struct cw1200_common *priv);
+static void cw1200_itp_tx_stop(struct cw1200_common *priv);
+static void cw1200_itp_handle(struct cw1200_common *priv,
+			      struct sk_buff *skb);
+static void cw1200_itp_err(struct cw1200_common *priv,
+			   int err,
+			   int arg);
+static void __cw1200_itp_tx_stop(struct cw1200_common *priv);
+
+static ssize_t cw1200_itp_read(struct file *file,
+	char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct cw1200_common *priv = file->private_data;
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct sk_buff *skb;
+	int ret;
+
+	if (skb_queue_empty(&itp->log_queue))
+		return 0;
+
+	skb = skb_dequeue(&itp->log_queue);
+	ret = copy_to_user(user_buf, skb->data, skb->len);
+	*ppos += skb->len;
+	skb->data[skb->len] = 0;
+	pr_debug("[ITP] >>> %s", skb->data);
+	consume_skb(skb);
+
+	return skb->len - ret;
+}
+
+static ssize_t cw1200_itp_write(struct file *file,
+	const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct cw1200_common *priv = file->private_data;
+	struct sk_buff *skb;
+
+	if (!count || count > 1024)
+		return -EINVAL;
+	skb = dev_alloc_skb(count + 1);
+	if (!skb)
+		return -ENOMEM;
+	skb_trim(skb, 0);
+	skb_put(skb, count + 1);
+	if (copy_from_user(skb->data, user_buf, count)) {
+		kfree_skb(skb);
+		return -EFAULT;
+	}
+	skb->data[count] = 0;
+
+	cw1200_itp_handle(priv, skb);
+	consume_skb(skb);
+	return count;
+}
+
+static unsigned int cw1200_itp_poll(struct file *file, poll_table *wait)
+{
+	struct cw1200_common *priv = file->private_data;
+	struct cw1200_itp *itp = &priv->debug->itp;
+	unsigned int mask = 0;
+
+	poll_wait(file, &itp->read_wait, wait);
+
+	if (!skb_queue_empty(&itp->log_queue))
+		mask |= POLLIN | POLLRDNORM;
+
+	mask |= POLLOUT | POLLWRNORM;
+
+	return mask;
+}
+
+static int cw1200_itp_open(struct inode *inode, struct file *file)
+{
+	struct cw1200_common *priv = inode->i_private;
+	struct cw1200_itp *itp = &priv->debug->itp;
+	int ret = 0;
+
+	file->private_data = priv;
+	if (atomic_inc_return(&itp->open_count) == 1) {
+		ret = __cw1200_itp_open(priv);
+		if (ret && !atomic_dec_return(&itp->open_count))
+			__cw1200_itp_close(priv);
+	} else {
+		atomic_dec(&itp->open_count);
+		ret = -EBUSY;
+	}
+
+	return ret;
+}
+
+static int cw1200_itp_close(struct inode *inode, struct file *file)
+{
+	struct cw1200_common *priv = file->private_data;
+	struct cw1200_itp *itp = &priv->debug->itp;
+	if (!atomic_dec_return(&itp->open_count)) {
+		__cw1200_itp_close(priv);
+		wake_up(&itp->close_wait);
+	}
+	return 0;
+}
+
+static const struct file_operations fops_itp = {
+	.open = cw1200_itp_open,
+	.read = cw1200_itp_read,
+	.write = cw1200_itp_write,
+	.poll = cw1200_itp_poll,
+	.release = cw1200_itp_close,
+	.llseek = default_llseek,
+	.owner = THIS_MODULE,
+};
+
+static void cw1200_itp_fill_pattern(u8 *data, int size,
+		enum cw1200_itp_data_modes mode)
+{
+	if (size <= 0)
+		return;
+
+	switch (mode) {
+	default:
+	case ITP_DATA_ZEROS:
+		memset(data, 0x0, size);
+		break;
+	case ITP_DATA_ONES:
+		memset(data, 0xff, size);
+		break;
+	case ITP_DATA_ZERONES:
+		memset(data, 0x55, size);
+		break;
+	case ITP_DATA_RANDOM:
+		get_random_bytes(data, size);
+		break;
+	}
+	return;
+}
+
+static void cw1200_itp_tx_work(struct work_struct *work)
+{
+	struct cw1200_itp *itp = container_of(work, struct cw1200_itp,
+		    tx_work.work);
+	struct cw1200_common *priv = itp->priv;
+	atomic_set(&priv->bh_tx, 1);
+	wake_up(&priv->bh_wq);
+}
+
+static void cw1200_itp_tx_finish(struct work_struct *work)
+{
+	struct cw1200_itp *itp = container_of(work, struct cw1200_itp,
+		    tx_finish.work);
+	__cw1200_itp_tx_stop(itp->priv);
+}
+
+int cw1200_itp_init(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+
+	itp->priv = priv;
+	atomic_set(&itp->open_count, 0);
+	atomic_set(&itp->stop_tx, 0);
+	atomic_set(&itp->awaiting_confirm, 0);
+	skb_queue_head_init(&itp->log_queue);
+	spin_lock_init(&itp->tx_lock);
+	init_waitqueue_head(&itp->read_wait);
+	init_waitqueue_head(&itp->write_wait);
+	init_waitqueue_head(&itp->close_wait);
+	INIT_DELAYED_WORK(&itp->tx_work, cw1200_itp_tx_work);
+	INIT_DELAYED_WORK(&itp->tx_finish, cw1200_itp_tx_finish);
+	itp->data = NULL;
+	itp->hdr_len = WSM_TX_EXTRA_HEADROOM +
+			sizeof(struct ieee80211_hdr_3addr);
+
+	if (!debugfs_create_file("itp", S_IRUSR | S_IWUSR,
+				 priv->debug->debugfs_phy, priv, &fops_itp))
+		return -ENOMEM;
+
+	return 0;
+}
+
+void cw1200_itp_release(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+
+	wait_event_interruptible(itp->close_wait,
+				 !atomic_read(&itp->open_count));
+
+	WARN_ON(atomic_read(&itp->open_count));
+
+	skb_queue_purge(&itp->log_queue);
+	cw1200_itp_tx_stop(priv);
+}
+
+static int __cw1200_itp_open(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+
+	if (!priv->vif)
+		return -EINVAL;
+	if (priv->join_status)
+		return -EINVAL;
+	itp->saved_channel = priv->channel;
+	if (!priv->channel)
+		priv->channel = &priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
+	wsm_set_bssid_filtering(priv, false);
+	cw1200_itp_rx_reset(priv);
+	return 0;
+}
+
+static int __cw1200_itp_close(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	if (atomic_read(&itp->test_mode) == TEST_MODE_RX_TEST)
+		cw1200_itp_rx_stop(priv);
+	cw1200_itp_tx_stop(priv);
+	cw1200_disable_listening(priv);
+	cw1200_update_filtering(priv);
+	priv->channel = itp->saved_channel;
+	return 0;
+}
+
+bool cw1200_is_itp(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	return atomic_read(&itp->open_count) != 0;
+}
+
+static void cw1200_itp_rx_reset(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	itp->rx_cnt = 0;
+	itp->rx_rssi = 0;
+	itp->rx_rssi_max = -1000;
+	itp->rx_rssi_min = 1000;
+}
+
+static void cw1200_itp_rx_start(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+
+	pr_debug("[ITP] RX start, band = %d, ch = %d\n",
+		 itp->band, itp->ch);
+	atomic_set(&itp->test_mode, TEST_MODE_RX_TEST);
+	cw1200_update_listening(priv, false);
+	priv->channel = &priv->hw->
+		wiphy->bands[itp->band]->channels[itp->ch];
+	cw1200_update_listening(priv, true);
+	wsm_set_bssid_filtering(priv, false);
+}
+
+static void cw1200_itp_rx_stop(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	pr_debug("[ITP] RX stop\n");
+	atomic_set(&itp->test_mode, TEST_MODE_NO_TEST);
+	cw1200_itp_rx_reset(priv);
+}
+
+static void cw1200_itp_rx_stats(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct sk_buff *skb;
+	char buf[128];
+	int len, ret;
+	struct wsm_mib_counters_table counters;
+
+	ret = wsm_get_counters_table(priv, &counters);
+
+	if (ret)
+		cw1200_itp_err(priv, -EBUSY, 20);
+
+	if (!itp->rx_cnt)
+		len = snprintf(buf, sizeof(buf), "1,0,0,0,0,%d\n",
+			       counters.rx_packet_errors);
+	else
+		len = snprintf(buf, sizeof(buf), "1,%d,%ld,%d,%d,%d\n",
+			       itp->rx_cnt,
+			       itp->rx_cnt ? itp->rx_rssi / itp->rx_cnt : 0,
+			       itp->rx_rssi_min, itp->rx_rssi_max,
+			       counters.rx_packet_errors);
+
+	if (len <= 0) {
+		cw1200_itp_err(priv, -EBUSY, 21);
+		return;
+	}
+
+	skb = dev_alloc_skb(len);
+	if (!skb) {
+		cw1200_itp_err(priv, -ENOMEM, 22);
+		return;
+	}
+
+	itp->rx_cnt = 0;
+	itp->rx_rssi = 0;
+	itp->rx_rssi_max = -1000;
+	itp->rx_rssi_min = 1000;
+
+	skb_trim(skb, 0);
+	skb_put(skb, len);
+
+	memcpy(skb->data, buf, len);
+	skb_queue_tail(&itp->log_queue, skb);
+	wake_up(&itp->read_wait);
+}
+
+static void cw1200_itp_tx_start(struct cw1200_common *priv)
+{
+	struct wsm_tx *tx;
+	struct ieee80211_hdr_3addr *hdr;
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct wsm_mib_association_mode assoc_mode = {
+		.flags = WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE,
+		.preamble = itp->preamble,
+	};
+	int len;
+	u8 da_addr[6] = ITP_DEFAULT_DA_ADDR;
+
+	/* Rates index 4 and 5 are not supported */
+	if (itp->rate > 3)
+		itp->rate += 2;
+
+	pr_debug("[ITP] TX start: band = %d, ch = %d, rate = %d, preamble = %d, number = %d, data_mode = %d, interval = %d, power = %d, data_len = %d\n",
+		 itp->band, itp->ch, itp->rate, itp->preamble,
+		 itp->number, itp->data_mode, itp->interval_us,
+		 itp->power, itp->data_len);
+
+	len = itp->hdr_len + itp->data_len;
+
+	itp->data = kmalloc(len, GFP_KERNEL);
+	tx = (struct wsm_tx *)itp->data;
+	tx->hdr.len = itp->data_len + itp->hdr_len;
+	tx->hdr.id = __cpu_to_le16(0x0004 | 1 << 6);
+	tx->max_tx_rate = itp->rate;
+	tx->queue_id = 3;
+	tx->more = 0;
+	tx->flags = 0xc;
+	tx->packet_id = 0x55ff55;
+	tx->reserved = 0;
+	tx->expire_time = 1;
+
+	if (itp->preamble == ITP_PREAMBLE_GREENFIELD)
+		tx->ht_tx_parameters = WSM_HT_TX_GREENFIELD;
+	else if (itp->preamble == ITP_PREAMBLE_MIXED)
+		tx->ht_tx_parameters = WSM_HT_TX_MIXED;
+
+	hdr = (struct ieee80211_hdr_3addr *)&itp->data[sizeof(struct wsm_tx)];
+	memset(hdr, 0, sizeof(*hdr));
+	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |	IEEE80211_FCTL_TODS);
+	memcpy(hdr->addr1, da_addr, ETH_ALEN);
+	memcpy(hdr->addr2, priv->vif->addr, ETH_ALEN);
+	memcpy(hdr->addr3, da_addr, ETH_ALEN);
+
+	cw1200_itp_fill_pattern(&itp->data[itp->hdr_len],
+				itp->data_len, itp->data_mode);
+
+	cw1200_update_listening(priv, false);
+	priv->channel = &priv->hw->wiphy->bands[itp->band]->channels[itp->ch];
+	WARN_ON(wsm_set_output_power(priv, itp->power));
+	if (itp->preamble == ITP_PREAMBLE_SHORT ||
+	    itp->preamble == ITP_PREAMBLE_LONG)
+		WARN_ON(wsm_set_association_mode(priv,
+						 &assoc_mode));
+	wsm_set_bssid_filtering(priv, false);
+	cw1200_update_listening(priv, true);
+
+	spin_lock_bh(&itp->tx_lock);
+	atomic_set(&itp->test_mode, TEST_MODE_TX_TEST);
+	atomic_set(&itp->awaiting_confirm, 0);
+	atomic_set(&itp->stop_tx, 0);
+	atomic_set(&priv->bh_tx, 1);
+	ktime_get_ts(&itp->last_sent);
+	wake_up(&priv->bh_wq);
+	spin_unlock_bh(&itp->tx_lock);
+}
+
+void __cw1200_itp_tx_stop(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	spin_lock_bh(&itp->tx_lock);
+	kfree(itp->data);
+	itp->data = NULL;
+	atomic_set(&itp->test_mode, TEST_MODE_NO_TEST);
+	spin_unlock_bh(&itp->tx_lock);
+}
+
+static void cw1200_itp_tx_stop(struct cw1200_common *priv)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	pr_debug("[ITP] TX stop\n");
+	atomic_set(&itp->stop_tx, 1);
+	flush_workqueue(priv->workqueue);
+
+	/* time for FW to confirm all tx requests */
+	msleep(500);
+
+	__cw1200_itp_tx_stop(priv);
+}
+
+static int cw1200_print_fw_version(struct cw1200_common *priv,
+				   u8 *buf, size_t len)
+{
+	return snprintf(buf, len, "%s %d.%d",
+			cw1200_fw_types[priv->wsm_caps.fw_type],
+			priv->wsm_caps.fw_ver,
+			priv->wsm_caps.fw_build);
+}
+
+static void cw1200_itp_get_version(struct cw1200_common *priv,
+		enum cw1200_itp_version_type type)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct sk_buff *skb;
+	char buf[ITP_BUF_SIZE];
+	size_t size = 0;
+	int len;
+	pr_debug("[ITP] print %s version\n",
+		 type == ITP_CHIP_ID ? "chip" : "firmware");
+
+	len = snprintf(buf, ITP_BUF_SIZE, "2,");
+	if (len <= 0) {
+		cw1200_itp_err(priv, -EINVAL, 40);
+		return;
+	}
+	size += len;
+
+	switch (type) {
+	case ITP_CHIP_ID:
+		len = cw1200_print_fw_version(priv, buf+size,
+				ITP_BUF_SIZE - size);
+
+		if (len <= 0) {
+			cw1200_itp_err(priv, -EINVAL, 41);
+			return;
+		}
+		size += len;
+		break;
+	case ITP_FW_VER:
+		len = snprintf(buf+size, ITP_BUF_SIZE - size,
+				"%d.%d", priv->wsm_caps.hw_id,
+				priv->wsm_caps.hw_subid);
+		if (len <= 0) {
+			cw1200_itp_err(priv, -EINVAL, 42);
+			return;
+		}
+		size += len;
+		break;
+	default:
+		cw1200_itp_err(priv, -EINVAL, 43);
+		break;
+	}
+
+	len = snprintf(buf+size, ITP_BUF_SIZE-size, "\n");
+	if (len <= 0) {
+		cw1200_itp_err(priv, -EINVAL, 44);
+		return;
+	}
+	size += len;
+
+	skb = dev_alloc_skb(size);
+	if (!skb) {
+		cw1200_itp_err(priv, -ENOMEM, 45);
+		return;
+	}
+
+	skb_trim(skb, 0);
+	skb_put(skb, size);
+
+	memcpy(skb->data, buf, size);
+	skb_queue_tail(&itp->log_queue, skb);
+	wake_up(&itp->read_wait);
+}
+
+int cw1200_itp_get_tx(struct cw1200_common *priv, u8 **data,
+		size_t *tx_len, int *burst)
+{
+	struct cw1200_itp *itp;
+	struct timespec now;
+	int time_left_us;
+
+	if (!priv->debug)
+		return 0;
+
+	itp	= &priv->debug->itp;
+
+	if (!itp)
+		return 0;
+
+	spin_lock_bh(&itp->tx_lock);
+	if (atomic_read(&itp->test_mode) != TEST_MODE_TX_TEST)
+		goto out;
+
+	if (atomic_read(&itp->stop_tx))
+		goto out;
+
+	if (itp->number == 0) {
+		atomic_set(&itp->stop_tx, 1);
+		queue_delayed_work(priv->workqueue, &itp->tx_finish, HZ/10);
+		goto out;
+	}
+
+	if (!itp->data)
+		goto out;
+
+	if (priv->hw_bufs_used >= 2) {
+		if (!atomic_read(&priv->bh_rx))
+			atomic_set(&priv->bh_rx, 1);
+		atomic_set(&priv->bh_tx, 1);
+		goto out;
+	}
+
+	ktime_get_ts(&now);
+	time_left_us = (itp->last_sent.tv_sec -	now.tv_sec)*1000000 +
+		(itp->last_sent.tv_nsec - now.tv_nsec)/1000 +
+		itp->interval_us;
+
+	if (time_left_us > ITP_TIME_THRES_US) {
+		queue_delayed_work(priv->workqueue, &itp->tx_work,
+				   ITP_US_TO_MS(time_left_us)*HZ/1000);
+		goto out;
+	}
+
+	if (time_left_us > 50)
+		udelay(time_left_us);
+
+	if (itp->number > 0)
+		itp->number--;
+
+	*data = itp->data;
+	*tx_len = itp->data_len + itp->hdr_len;
+
+	if (itp->data_mode == ITP_DATA_RANDOM)
+		cw1200_itp_fill_pattern(&itp->data[itp->hdr_len],
+					itp->data_len, itp->data_mode);
+	*burst = 2;
+	atomic_set(&priv->bh_tx, 1);
+	ktime_get_ts(&itp->last_sent);
+	atomic_add(1, &itp->awaiting_confirm);
+	spin_unlock_bh(&itp->tx_lock);
+	return 1;
+
+out:
+	spin_unlock_bh(&itp->tx_lock);
+	return 0;
+}
+
+bool cw1200_itp_rxed(struct cw1200_common *priv, struct sk_buff *skb)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct ieee80211_rx_status *rx = IEEE80211_SKB_RXCB(skb);
+	int signal;
+
+	if (atomic_read(&itp->test_mode) != TEST_MODE_RX_TEST)
+		return cw1200_is_itp(priv);
+	if (rx->freq != priv->channel->center_freq)
+		return true;
+
+	signal = rx->signal;
+	itp->rx_cnt++;
+	itp->rx_rssi += signal;
+	if (itp->rx_rssi_min > rx->signal)
+		itp->rx_rssi_min = rx->signal;
+	if (itp->rx_rssi_max < rx->signal)
+		itp->rx_rssi_max = rx->signal;
+
+	return true;
+}
+
+void cw1200_itp_wake_up_tx(struct cw1200_common *priv)
+{
+	wake_up(&priv->debug->itp.write_wait);
+}
+
+bool cw1200_itp_tx_running(struct cw1200_common *priv)
+{
+	if (atomic_read(&priv->debug->itp.awaiting_confirm) ||
+	    atomic_read(&priv->debug->itp.test_mode) ==
+	    TEST_MODE_TX_TEST) {
+		atomic_sub(1, &priv->debug->itp.awaiting_confirm);
+		return true;
+	}
+	return false;
+}
+
+static void cw1200_itp_handle(struct cw1200_common *priv,
+			      struct sk_buff *skb)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	const struct wiphy *wiphy = priv->hw->wiphy;
+	int cmd;
+	int ret;
+
+	pr_debug("[ITP] <<< %s", skb->data);
+	if (sscanf(skb->data, "%d", &cmd) != 1) {
+		cw1200_itp_err(priv, -EINVAL, 1);
+		return;
+	}
+
+	switch (cmd) {
+	case 1: /* RX test */
+		if (atomic_read(&itp->test_mode)) {
+			cw1200_itp_err(priv, -EBUSY, 0);
+			return;
+		}
+		ret = sscanf(skb->data, "%d,%d,%d",
+				&cmd, &itp->band, &itp->ch);
+		if (ret != 3) {
+			cw1200_itp_err(priv, -EINVAL, ret + 1);
+			return;
+		}
+		if (itp->band >= 2) {
+			cw1200_itp_err(priv, -EINVAL, 2);
+		} else if (!wiphy->bands[itp->band]) {
+			cw1200_itp_err(priv, -EINVAL, 2);
+		} else if (itp->ch >= wiphy->bands[itp->band]->n_channels) {
+			cw1200_itp_err(priv, -EINVAL, 3);
+		} else {
+			cw1200_itp_rx_stats(priv);
+			cw1200_itp_rx_start(priv);
+		}
+		break;
+	case 2: /* RX stat */
+		cw1200_itp_rx_stats(priv);
+		break;
+	case 3: /* RX/TX stop */
+		if (atomic_read(&itp->test_mode) == TEST_MODE_RX_TEST) {
+			cw1200_itp_rx_stats(priv);
+			cw1200_itp_rx_stop(priv);
+		} else if (atomic_read(&itp->test_mode) == TEST_MODE_TX_TEST) {
+			cw1200_itp_tx_stop(priv);
+		} else {
+			cw1200_itp_err(priv, -EBUSY, 0);
+		}
+		break;
+	case 4: /* TX start */
+		if (atomic_read(&itp->test_mode) != TEST_MODE_NO_TEST) {
+			cw1200_itp_err(priv, -EBUSY, 0);
+			return;
+		}
+		ret = sscanf(skb->data, "%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
+				&cmd, &itp->band, &itp->ch, &itp->rate,
+				&itp->preamble, &itp->number, &itp->data_mode,
+				&itp->interval_us, &itp->power, &itp->data_len);
+		if (ret != 10) {
+			cw1200_itp_err(priv, -EINVAL, ret + 1);
+			return;
+		}
+		if (itp->band >= 2) {
+			cw1200_itp_err(priv, -EINVAL, 2);
+		} else if (!wiphy->bands[itp->band]) {
+			cw1200_itp_err(priv, -EINVAL, 2);
+		} else if (itp->ch >= wiphy->bands[itp->band]->n_channels) {
+			cw1200_itp_err(priv, -EINVAL, 3);
+		} else if (itp->rate >= 20) {
+			cw1200_itp_err(priv, -EINVAL, 4);
+		} else if (itp->preamble >= ITP_PREAMBLE_MAX) {
+			cw1200_itp_err(priv, -EINVAL, 5);
+		} else if (itp->data_mode >= ITP_DATA_MAX_MODE) {
+			cw1200_itp_err(priv, -EINVAL, 7);
+		} else if (itp->data_len < ITP_MIN_DATA_SIZE ||
+			   itp->data_len > (priv->wsm_caps.input_buffer_size - itp->hdr_len)) {
+			cw1200_itp_err(priv, -EINVAL, 8);
+		} else {
+		    cw1200_itp_tx_start(priv);
+		}
+		break;
+	case 5:
+		cw1200_itp_get_version(priv, ITP_CHIP_ID);
+		break;
+	case 6:
+		cw1200_itp_get_version(priv, ITP_FW_VER);
+		break;
+	}
+}
+
+static void cw1200_itp_err(struct cw1200_common *priv,
+			   int err, int arg)
+{
+	struct cw1200_itp *itp = &priv->debug->itp;
+	struct sk_buff *skb;
+	static char buf[255];
+	int len;
+
+	len = snprintf(buf, sizeof(buf), "%d,%d\n",
+		err, arg);
+	if (len <= 0)
+		return;
+
+	skb = dev_alloc_skb(len);
+	if (!skb)
+		return;
+
+	skb_trim(skb, 0);
+	skb_put(skb, len);
+
+	memcpy(skb->data, buf, len);
+	skb_queue_tail(&itp->log_queue, skb);
+	wake_up(&itp->read_wait);
+
+	len = sprint_symbol(buf,
+			(unsigned long)__builtin_return_address(0));
+	if (len <= 0)
+		return;
+	pr_debug("[ITP] error %d,%d from %s\n",
+		 err, arg, buf);
+}

drivers/net/wireless/cw1200/itp.h

+/*
+ * ITP code for ST-Ericsson CW1200 mac80211 driver
+ *
+ * Copyright (c) 2011, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_ITP_H_INCLUDED
+#define CW1200_ITP_H_INCLUDED
+
+struct cw200_common;
+struct wsm_tx_confirm;
+struct dentry;
+
+#ifdef CONFIG_CW1200_ITP
+
+/*extern*/ struct ieee80211_channel;
+
+#define TEST_MODE_NO_TEST	(0)
+#define TEST_MODE_RX_TEST	(1)
+#define TEST_MODE_TX_TEST	(2)
+#define ITP_DEFAULT_DA_ADDR {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
+#define ITP_MIN_DATA_SIZE 6
+#define ITP_MAX_DATA_SIZE 1600
+#define ITP_TIME_THRES_US 10000
+#define ITP_US_TO_MS(x) ((x)/1000)
+#define ITP_MS_TO_US(x) ((x)*1000)
+#define ITP_BUF_SIZE 255
+
+
+enum cw1200_itp_data_modes {
+	ITP_DATA_ZEROS,
+	ITP_DATA_ONES,
+	ITP_DATA_ZERONES,
+	ITP_DATA_RANDOM,
+	ITP_DATA_MAX_MODE,
+};
+
+enum cw1200_itp_version_type {
+	ITP_CHIP_ID,
+	ITP_FW_VER,
+};
+
+enum cw1200_itp_preamble_type {
+	ITP_PREAMBLE_LONG,
+	ITP_PREAMBLE_SHORT,
+	ITP_PREAMBLE_OFDM,
+	ITP_PREAMBLE_MIXED,
+	ITP_PREAMBLE_GREENFIELD,
+	ITP_PREAMBLE_MAX,
+};
+
+
+struct cw1200_itp {
+	struct cw1200_common	*priv;
+	atomic_t		open_count;
+	atomic_t		awaiting_confirm;
+	struct sk_buff_head	log_queue;
+	wait_queue_head_t	read_wait;
+	wait_queue_head_t	write_wait;
+	wait_queue_head_t	close_wait;
+	struct ieee80211_channel *saved_channel;
+	atomic_t		stop_tx;
+	struct delayed_work	tx_work;
+	struct delayed_work	tx_finish;
+	spinlock_t		tx_lock;
+	struct timespec		last_sent;
+	atomic_t		test_mode;
+	int			rx_cnt;
+	long			rx_rssi;
+	int			rx_rssi_max;
+	int			rx_rssi_min;
+	unsigned		band;
+	unsigned		ch;
+	unsigned		rate;
+	unsigned		preamble;
+	unsigned int		number;
+	unsigned		data_mode;
+	int			interval_us;
+	int			power;
+	u8			*data;
+	int			hdr_len;
+	int			data_len;
+};
+
+int cw1200_itp_init(struct cw1200_common *priv);
+void cw1200_itp_release(struct cw1200_common *priv);
+
+bool cw1200_is_itp(struct cw1200_common *priv);
+bool cw1200_itp_rxed(struct cw1200_common *priv, struct sk_buff *skb);
+void cw1200_itp_wake_up_tx(struct cw1200_common *priv);
+int cw1200_itp_get_tx(struct cw1200_common *priv, u8 **data,
+		size_t *tx_len, int *burst);
+bool cw1200_itp_tx_running(struct cw1200_common *priv);
+
+#else /* CONFIG_CW1200_ITP */
+
+static inline int cw1200_itp_init(struct cw1200_common *priv)
+{
+	return 0;
+}
+
+static inline void cw1200_itp_release(struct cw1200_common *priv)
+{
+}
+
+static inline bool cw1200_is_itp(struct cw1200_common *priv)
+{
+	return false;
+}
+
+static inline bool cw1200_itp_rxed(struct cw1200_common *priv,
+				   struct sk_buff *skb)
+{
+	return false;
+}
+
+
+static inline void cw1200_itp_consume_txed(struct cw1200_common *priv)
+{
+}
+
+static inline void cw1200_itp_wake_up_tx(struct cw1200_common *priv)
+{
+}
+
+static inline int cw1200_itp_get_tx(struct cw1200_common *priv, u8 **data,
+				    size_t *tx_len, int *burst)
+{
+	return 0;
+}
+
+static inline bool cw1200_itp_tx_running(struct cw1200_common *priv)
+{
+	return false;
+}
+
+#endif /* CONFIG_CW1200_ITP */
+
+#endif /* CW1200_ITP_H_INCLUDED */

drivers/net/wireless/cw1200/main.c

+/*
+ * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on:
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * Based on:
+ * - the islsm (softmac prism54) driver, which is:
+ *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ * - stlc45xx driver
+ *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/random.h>
+#include <linux/sched.h>
+#include <net/mac80211.h>
+
+#include "cw1200.h"
+#include "txrx.h"
+#include "sbus.h"
+#include "fwio.h"
+#include "hwio.h"
+#include "bh.h"
+#include "sta.h"
+#include "scan.h"
+#include "debug.h"
+#include "pm.h"
+
+MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
+MODULE_DESCRIPTION("Softmac ST-Ericsson CW1200 common code");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("cw1200_core");
+
+/* Accept MAC address of the form macaddr=0x00,0x80,0xE1,0x30,0x40,0x50 */
+static u8 cw1200_mac_template[ETH_ALEN] = {0x02, 0x80, 0xe1, 0x00, 0x00, 0x00};
+module_param_array_named(macaddr, cw1200_mac_template, byte, NULL, S_IRUGO);
+MODULE_PARM_DESC(macaddr, "Override platform_data MAC address");
+
+static char *cw1200_sdd_path;
+module_param(cw1200_sdd_path, charp, 0644);
+MODULE_PARM_DESC(cw1200_sdd_path, "Override platform_data SDD file");
+static int cw1200_refclk;
+module_param(cw1200_refclk, int, 0644);
+MODULE_PARM_DESC(cw1200_refclk, "Override platform_data reference clock");
+
+int cw1200_power_mode = wsm_power_mode_quiescent;
+module_param(cw1200_power_mode, int, 0644);
+MODULE_PARM_DESC(cw1200_power_mode, "WSM power mode.  0 == active, 1 == doze, 2 == quiescent (default)");
+
+#ifdef CONFIG_CW1200_ETF
+int etf_mode;
+module_param(etf_mode, int, 0644);
+MODULE_PARM_DESC(etf_mode, "Enable EngineeringTestingFramework operation");
+#endif
+
+#define RATETAB_ENT(_rate, _rateid, _flags)		\
+	{						\
+		.bitrate	= (_rate),		\
+		.hw_value	= (_rateid),		\
+		.flags		= (_flags),		\
+	}
+
+static struct ieee80211_rate cw1200_rates[] = {
+	RATETAB_ENT(10,  0,   0),
+	RATETAB_ENT(20,  1,   0),
+	RATETAB_ENT(55,  2,   0),
+	RATETAB_ENT(110, 3,   0),
+	RATETAB_ENT(60,  6,  0),
+	RATETAB_ENT(90,  7,  0),
+	RATETAB_ENT(120, 8,  0),
+	RATETAB_ENT(180, 9,  0),
+	RATETAB_ENT(240, 10, 0),
+	RATETAB_ENT(360, 11, 0),
+	RATETAB_ENT(480, 12, 0),
+	RATETAB_ENT(540, 13, 0),
+};
+
+static struct ieee80211_rate cw1200_mcs_rates[] = {
+	RATETAB_ENT(65,  14, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(130, 15, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(195, 16, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(260, 17, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(390, 18, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(520, 19, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(585, 20, IEEE80211_TX_RC_MCS),
+	RATETAB_ENT(650, 21, IEEE80211_TX_RC_MCS),
+};
+
+#define cw1200_a_rates		(cw1200_rates + 4)
+#define cw1200_a_rates_size	(ARRAY_SIZE(cw1200_rates) - 4)
+#define cw1200_g_rates		(cw1200_rates + 0)
+#define cw1200_g_rates_size	(ARRAY_SIZE(cw1200_rates))
+#define cw1200_n_rates		(cw1200_mcs_rates)
+#define cw1200_n_rates_size	(ARRAY_SIZE(cw1200_mcs_rates))
+
+
+#define CHAN2G(_channel, _freq, _flags) {			\
+	.band			= IEEE80211_BAND_2GHZ,		\
+	.center_freq		= (_freq),			\
+	.hw_value		= (_channel),			\
+	.flags			= (_flags),			\
+	.max_antenna_gain	= 0,				\
+	.max_power		= 30,				\
+}
+
+#define CHAN5G(_channel, _flags) {				\
+	.band			= IEEE80211_BAND_5GHZ,		\
+	.center_freq	= 5000 + (5 * (_channel)),		\
+	.hw_value		= (_channel),			\
+	.flags			= (_flags),			\
+	.max_antenna_gain	= 0,				\
+	.max_power		= 30,				\
+}
+
+static struct ieee80211_channel cw1200_2ghz_chantable[] = {
+	CHAN2G(1, 2412, 0),
+	CHAN2G(2, 2417, 0),
+	CHAN2G(3, 2422, 0),
+	CHAN2G(4, 2427, 0),
+	CHAN2G(5, 2432, 0),
+	CHAN2G(6, 2437, 0),
+	CHAN2G(7, 2442, 0),
+	CHAN2G(8, 2447, 0),
+	CHAN2G(9, 2452, 0),
+	CHAN2G(10, 2457, 0),
+	CHAN2G(11, 2462, 0),
+	CHAN2G(12, 2467, 0),
+	CHAN2G(13, 2472, 0),
+	CHAN2G(14, 2484, 0),
+};
+
+static struct ieee80211_channel cw1200_5ghz_chantable[] = {
+	CHAN5G(34, 0),		CHAN5G(36, 0),
+	CHAN5G(38, 0),		CHAN5G(40, 0),
+	CHAN5G(42, 0),		CHAN5G(44, 0),
+	CHAN5G(46, 0),		CHAN5G(48, 0),
+	CHAN5G(52, 0),		CHAN5G(56, 0),
+	CHAN5G(60, 0),		CHAN5G(64, 0),
+	CHAN5G(100, 0),		CHAN5G(104, 0),
+	CHAN5G(108, 0),		CHAN5G(112, 0),
+	CHAN5G(116, 0),		CHAN5G(120, 0),
+	CHAN5G(124, 0),		CHAN5G(128, 0),
+	CHAN5G(132, 0),		CHAN5G(136, 0),
+	CHAN5G(140, 0),		CHAN5G(149, 0),
+	CHAN5G(153, 0),		CHAN5G(157, 0),
+	CHAN5G(161, 0),		CHAN5G(165, 0),
+	CHAN5G(184, 0),		CHAN5G(188, 0),
+	CHAN5G(192, 0),		CHAN5G(196, 0),
+	CHAN5G(200, 0),		CHAN5G(204, 0),
+	CHAN5G(208, 0),		CHAN5G(212, 0),
+	CHAN5G(216, 0),
+};
+
+static struct ieee80211_supported_band cw1200_band_2ghz = {
+	.channels = cw1200_2ghz_chantable,
+	.n_channels = ARRAY_SIZE(cw1200_2ghz_chantable),
+	.bitrates = cw1200_g_rates,
+	.n_bitrates = cw1200_g_rates_size,
+	.ht_cap = {
+		.cap = IEEE80211_HT_CAP_GRN_FLD |
+			(1 << IEEE80211_HT_CAP_RX_STBC_SHIFT) |
+			IEEE80211_HT_CAP_MAX_AMSDU,
+		.ht_supported = 1,
+		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K,
+		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE,
+		.mcs = {
+			.rx_mask[0] = 0xFF,
+			.rx_highest = __cpu_to_le16(0x41),
+			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
+		},
+	},
+};
+
+static struct ieee80211_supported_band cw1200_band_5ghz = {
+	.channels = cw1200_5ghz_chantable,
+	.n_channels = ARRAY_SIZE(cw1200_5ghz_chantable),
+	.bitrates = cw1200_a_rates,
+	.n_bitrates = cw1200_a_rates_size,
+	.ht_cap = {
+		.cap = IEEE80211_HT_CAP_GRN_FLD |
+			(1 << IEEE80211_HT_CAP_RX_STBC_SHIFT) |
+			IEEE80211_HT_CAP_MAX_AMSDU,
+		.ht_supported = 1,
+		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K,
+		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE,
+		.mcs = {
+			.rx_mask[0] = 0xFF,
+			.rx_highest = __cpu_to_le16(0x41),
+			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
+		},
+	},
+};
+
+static const unsigned long cw1200_ttl[] = {
+	1 * HZ,	/* VO */
+	2 * HZ,	/* VI */
+	5 * HZ, /* BE */
+	10 * HZ	/* BK */
+};
+
+static const struct ieee80211_ops cw1200_ops = {
+	.start			= cw1200_start,
+	.stop			= cw1200_stop,
+	.add_interface		= cw1200_add_interface,
+	.remove_interface	= cw1200_remove_interface,
+	.change_interface	= cw1200_change_interface,
+	.tx			= cw1200_tx,
+	.hw_scan		= cw1200_hw_scan,
+	.set_tim		= cw1200_set_tim,
+	.sta_notify		= cw1200_sta_notify,
+	.sta_add		= cw1200_sta_add,
+	.sta_remove		= cw1200_sta_remove,
+	.set_key		= cw1200_set_key,
+	.set_rts_threshold	= cw1200_set_rts_threshold,
+	.config			= cw1200_config,
+	.bss_info_changed	= cw1200_bss_info_changed,
+	.prepare_multicast	= cw1200_prepare_multicast,
+	.configure_filter	= cw1200_configure_filter,
+	.conf_tx		= cw1200_conf_tx,
+	.get_stats		= cw1200_get_stats,
+	.ampdu_action		= cw1200_ampdu_action,
+	.flush			= cw1200_flush,
+	.suspend		= cw1200_wow_suspend,
+	.resume			= cw1200_wow_resume,
+	/* Intentionally not offloaded:					*/
+	/*.channel_switch	= cw1200_channel_switch,		*/
+	/*.remain_on_channel	= cw1200_remain_on_channel,		*/
+	/*.cancel_remain_on_channel = cw1200_cancel_remain_on_channel,	*/
+};
+
+int cw1200_ba_rx_tids = -1;
+int cw1200_ba_tx_tids = -1;
+module_param(cw1200_ba_rx_tids, int, 0644);
+module_param(cw1200_ba_tx_tids, int, 0644);
+MODULE_PARM_DESC(cw1200_ba_rx_tids, "Block ACK RX TIDs");
+MODULE_PARM_DESC(cw1200_ba_tx_tids, "Block ACK TX TIDs");
+
+static struct ieee80211_hw *cw1200_init_common(const u8 *macaddr,
+						const bool have_5ghz)
+{
+	int i, band;
+	struct ieee80211_hw *hw;
+	struct cw1200_common *priv;
+
+	hw = ieee80211_alloc_hw(sizeof(struct cw1200_common), &cw1200_ops);
+	if (!hw)
+		return NULL;
+
+	priv = hw->priv;
+	priv->hw = hw;
+	priv->hw_type = -1;
+	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+	priv->rates = cw1200_rates; /* TODO: fetch from FW */
+	priv->mcs_rates = cw1200_n_rates;
+	if (cw1200_ba_rx_tids != -1)
+		priv->ba_rx_tid_mask = cw1200_ba_rx_tids;
+	else
+		priv->ba_rx_tid_mask = 0xFF; /* Enable RX BLKACK for all TIDs */
+	if (cw1200_ba_tx_tids != -1)
+		priv->ba_tx_tid_mask = cw1200_ba_tx_tids;
+	else
+		priv->ba_tx_tid_mask = 0xff; /* Enable TX BLKACK for all TIDs */
+
+	hw->flags = IEEE80211_HW_SIGNAL_DBM |
+		    IEEE80211_HW_SUPPORTS_PS |
+		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
+		    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+		    IEEE80211_HW_SUPPORTS_UAPSD |
+		    IEEE80211_HW_CONNECTION_MONITOR |
+		    IEEE80211_HW_AMPDU_AGGREGATION |
+		    IEEE80211_HW_TX_AMPDU_SETUP_IN_HW |
+		    IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC;
+
+	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+					  BIT(NL80211_IFTYPE_ADHOC) |
+					  BIT(NL80211_IFTYPE_AP) |
+					  BIT(NL80211_IFTYPE_MESH_POINT) |
+					  BIT(NL80211_IFTYPE_P2P_CLIENT) |
+					  BIT(NL80211_IFTYPE_P2P_GO);
+
+	/* Support only for limited wowlan functionalities */
+	hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY |
+		WIPHY_WOWLAN_DISCONNECT;
+	hw->wiphy->wowlan.n_patterns = 0;
+
+	hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
+
+	hw->channel_change_time = 1000;	/* TODO: find actual value */
+	hw->queues = 4;
+
+	priv->rts_threshold = -1;
+
+	hw->max_rates = 8;
+	hw->max_rate_tries = 15;
+	hw->extra_tx_headroom = WSM_TX_EXTRA_HEADROOM +
+		8;  /* TKIP IV */
+
+	hw->sta_data_size = sizeof(struct cw1200_sta_priv);
+
+	hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &cw1200_band_2ghz;
+	if (have_5ghz)
+		hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &cw1200_band_5ghz;
+
+	/* Channel params have to be cleared before registering wiphy again */
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
+		if (!sband)
+			continue;
+		for (i = 0; i < sband->n_channels; i++) {
+			sband->channels[i].flags = 0;
+			sband->channels[i].max_antenna_gain = 0;
+			sband->channels[i].max_power = 30;
+		}
+	}
+
+	hw->wiphy->max_scan_ssids = 2;
+	hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
+
+	if (macaddr)
+		SET_IEEE80211_PERM_ADDR(hw, (u8 *)macaddr);
+	else
+		SET_IEEE80211_PERM_ADDR(hw, cw1200_mac_template);
+
+	/* Fix up mac address if necessary */
+	if (hw->wiphy->perm_addr[3] == 0 &&
+	    hw->wiphy->perm_addr[4] == 0 &&
+	    hw->wiphy->perm_addr[5] == 0) {
+		get_random_bytes(&hw->wiphy->perm_addr[3], 3);
+	}
+
+	mutex_init(&priv->wsm_cmd_mux);
+	mutex_init(&priv->conf_mutex);
+	priv->workqueue = create_singlethread_workqueue("cw1200_wq");
+	sema_init(&priv->scan.lock, 1);
+	INIT_WORK(&priv->scan.work, cw1200_scan_work);
+	INIT_DELAYED_WORK(&priv->scan.probe_work, cw1200_probe_work);
+	INIT_DELAYED_WORK(&priv->scan.timeout, cw1200_scan_timeout);
+	INIT_DELAYED_WORK(&priv->clear_recent_scan_work,
+			  cw1200_clear_recent_scan_work);
+	INIT_DELAYED_WORK(&priv->join_timeout, cw1200_join_timeout);
+	INIT_WORK(&priv->unjoin_work, cw1200_unjoin_work);
+	INIT_WORK(&priv->join_complete_work, cw1200_join_complete_work);
+	INIT_WORK(&priv->wep_key_work, cw1200_wep_key_work);
+	INIT_WORK(&priv->tx_policy_upload_work, tx_policy_upload_work);
+	spin_lock_init(&priv->event_queue_lock);
+	INIT_LIST_HEAD(&priv->event_queue);
+	INIT_WORK(&priv->event_handler, cw1200_event_handler);
+	INIT_DELAYED_WORK(&priv->bss_loss_work, cw1200_bss_loss_work);
+	INIT_WORK(&priv->bss_params_work, cw1200_bss_params_work);
+	spin_lock_init(&priv->bss_loss_lock);
+	spin_lock_init(&priv->ps_state_lock);
+	INIT_WORK(&priv->set_cts_work, cw1200_set_cts_work);
+	INIT_WORK(&priv->set_tim_work, cw1200_set_tim_work);
+	INIT_WORK(&priv->multicast_start_work, cw1200_multicast_start_work);
+	INIT_WORK(&priv->multicast_stop_work, cw1200_multicast_stop_work);
+	INIT_WORK(&priv->link_id_work, cw1200_link_id_work);
+	INIT_DELAYED_WORK(&priv->link_id_gc_work, cw1200_link_id_gc_work);
+	INIT_WORK(&priv->linkid_reset_work, cw1200_link_id_reset);
+	INIT_WORK(&priv->update_filtering_work, cw1200_update_filtering_work);
+	INIT_WORK(&priv->set_beacon_wakeup_period_work,
+		  cw1200_set_beacon_wakeup_period_work);
+	init_timer(&priv->mcast_timeout);
+	priv->mcast_timeout.data = (unsigned long)priv;
+	priv->mcast_timeout.function = cw1200_mcast_timeout;
+
+	if (cw1200_queue_stats_init(&priv->tx_queue_stats,
+				    CW1200_LINK_ID_MAX,
+				    cw1200_skb_dtor,
+				    priv)) {
+		ieee80211_free_hw(hw);
+		return NULL;
+	}
+
+	for (i = 0; i < 4; ++i) {
+		if (cw1200_queue_init(&priv->tx_queue[i],
+				      &priv->tx_queue_stats, i, 16,
+				      cw1200_ttl[i])) {
+			for (; i > 0; i--)
+				cw1200_queue_deinit(&priv->tx_queue[i - 1]);
+			cw1200_queue_stats_deinit(&priv->tx_queue_stats);
+			ieee80211_free_hw(hw);
+			return NULL;
+		}
+	}
+
+	init_waitqueue_head(&priv->channel_switch_done);
+	init_waitqueue_head(&priv->wsm_cmd_wq);
+	init_waitqueue_head(&priv->wsm_startup_done);
+	init_waitqueue_head(&priv->ps_mode_switch_done);
+	wsm_buf_init(&priv->wsm_cmd_buf);
+	spin_lock_init(&priv->wsm_cmd.lock);
+	priv->wsm_cmd.done = 1;
+	tx_policy_init(priv);
+
+	return hw;
+}
+
+static int cw1200_register_common(struct ieee80211_hw *dev)
+{
+	struct cw1200_common *priv = dev->priv;
+	int err;
+
+#ifdef CONFIG_CW1200_ETF
+	if (etf_mode)
+		goto done;
+#endif
+
+	err = cw1200_pm_init(&priv->pm_state, priv);
+	if (err) {
+		pr_err("Cannot init PM. (%d).\n",
+		       err);
+		return err;
+	}
+
+	err = ieee80211_register_hw(dev);
+	if (err) {
+		pr_err("Cannot register device (%d).\n",
+		       err);
+		cw1200_pm_deinit(&priv->pm_state);
+		return err;
+	}
+
+#ifdef CONFIG_CW1200_ETF
+done:
+#endif
+	cw1200_debug_init(priv);
+
+	pr_info("Registered as '%s'\n", wiphy_name(dev->wiphy));
+	return 0;
+}
+
+static void cw1200_free_common(struct ieee80211_hw *dev)
+{
+	ieee80211_free_hw(dev);
+}
+
+static void cw1200_unregister_common(struct ieee80211_hw *dev)
+{
+	struct cw1200_common *priv = dev->priv;
+	int i;
+
+#ifdef CONFIG_CW1200_ETF
+	if (!etf_mode) {
+#endif
+		ieee80211_unregister_hw(dev);
+#ifdef CONFIG_CW1200_ETF
+	}
+#endif
+
+	del_timer_sync(&priv->mcast_timeout);
+	cw1200_unregister_bh(priv);
+
+	cw1200_debug_release(priv);
+
+	mutex_destroy(&priv->conf_mutex);
+
+	wsm_buf_deinit(&priv->wsm_cmd_buf);
+
+	destroy_workqueue(priv->workqueue);
+	priv->workqueue = NULL;
+
+	if (priv->sdd) {
+		release_firmware(priv->sdd);
+		priv->sdd = NULL;
+	}
+
+	for (i = 0; i < 4; ++i)
+		cw1200_queue_deinit(&priv->tx_queue[i]);
+
+	cw1200_queue_stats_deinit(&priv->tx_queue_stats);
+	cw1200_pm_deinit(&priv->pm_state);
+}
+
+/* Clock is in KHz */
+u32 cw1200_dpll_from_clk(u16 clk_khz)
+{
+	switch (clk_khz) {
+	case 0x32C8: /* 13000 KHz */
+		return 0x1D89D241;
+	case 0x3E80: /* 16000 KHz */
+		return 0x000001E1;
+	case 0x41A0: /* 16800 KHz */
+		return 0x124931C1;
+	case 0x4B00: /* 19200 KHz */
+		return 0x00000191;
+	case 0x5DC0: /* 24000 KHz */
+		return 0x00000141;
+	case 0x6590: /* 26000 KHz */
+		return 0x0EC4F121;
+	case 0x8340: /* 33600 KHz */
+		return 0x092490E1;
+	case 0x9600: /* 38400 KHz */
+		return 0x100010C1;
+	case 0x9C40: /* 40000 KHz */
+		return 0x000000C1;
+	case 0xBB80: /* 48000 KHz */
+		return 0x000000A1;
+	case 0xCB20: /* 52000 KHz */
+		return 0x07627091;
+	default:
+		pr_err("Unknown Refclk freq (0x%04x), using 2600KHz\n",
+		       clk_khz);
+		return 0x0EC4F121;
+	}
+}
+
+int cw1200_core_probe(const struct sbus_ops *sbus_ops,
+		      struct sbus_priv *sbus,
+		      struct device *pdev,
+		      struct cw1200_common **core,
+		      int ref_clk, const u8 *macaddr,
+		      const char *sdd_path, bool have_5ghz)
+{
+	int err = -EINVAL;
+	struct ieee80211_hw *dev;
+	struct cw1200_common *priv;
+	struct wsm_operational_mode mode = {
+		.power_mode = cw1200_power_mode,
+		.disable_more_flag_usage = true,
+	};
+
+	dev = cw1200_init_common(macaddr, have_5ghz);
+	if (!dev)
+		goto err;
+
+	priv = dev->priv;
+	priv->hw_refclk = ref_clk;
+	if (cw1200_refclk)
+		priv->hw_refclk = cw1200_refclk;
+
+	priv->sdd_path = (char *)sdd_path;
+	if (cw1200_sdd_path)
+		priv->sdd_path = cw1200_sdd_path;
+
+	priv->sbus_ops = sbus_ops;
+	priv->sbus_priv = sbus;
+	priv->pdev = pdev;
+	SET_IEEE80211_DEV(priv->hw, pdev);
+
+	/* Pass struct cw1200_common back up */
+	*core = priv;
+
+	err = cw1200_register_bh(priv);
+	if (err)
+		goto err1;
+
+#ifdef CONFIG_CW1200_ETF
+	if (etf_mode)
+		goto skip_fw;
+#endif
+
+	err = cw1200_load_firmware(priv);
+	if (err)
+		goto err2;
+
+	if (wait_event_interruptible_timeout(priv->wsm_startup_done,
+					     priv->firmware_ready,
+					     3*HZ) <= 0) {
+		/* TODO: Need to find how to reset device
+		   in QUEUE mode properly.
+		*/
+		pr_err("Timeout waiting on device startup\n");
+		err = -ETIMEDOUT;
+		goto err2;
+	}
+
+	/* Set low-power mode. */
+	wsm_set_operational_mode(priv, &mode);
+
+	/* Enable multi-TX confirmation */
+	wsm_use_multi_tx_conf(priv, true);
+
+#ifdef CONFIG_CW1200_ETF
+skip_fw:
+#endif
+	err = cw1200_register_common(dev);
+	if (err)
+		goto err2;
+
+	return err;
+
+err2:
+	cw1200_unregister_bh(priv);
+err1:
+	cw1200_free_common(dev);
+err:
+	*core = NULL;
+	return err;
+}
+EXPORT_SYMBOL_GPL(cw1200_core_probe);
+
+void cw1200_core_release(struct cw1200_common *self)
+{
+	/* Disable device interrupts */
+	self->sbus_ops->lock(self->sbus_priv);
+	__cw1200_irq_enable(self, 0);
+	self->sbus_ops->unlock(self->sbus_priv);
+
+	/* And then clean up */
+	cw1200_unregister_common(self->hw);
+	cw1200_free_common(self->hw);
+	return;
+}
+EXPORT_SYMBOL_GPL(cw1200_core_release);

drivers/net/wireless/cw1200/pm.c

+/*
+ * Mac80211 power management API for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2011, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/if_ether.h>
+#include "cw1200.h"
+#include "pm.h"
+#include "sta.h"
+#include "bh.h"
+#include "sbus.h"
+
+#define CW1200_BEACON_SKIPPING_MULTIPLIER 3
+
+struct cw1200_udp_port_filter {
+	struct wsm_udp_port_filter_hdr hdr;
+	/* Up to 4 filters are allowed. */
+	struct wsm_udp_port_filter filters[WSM_MAX_FILTER_ELEMENTS];
+} __packed;
+
+struct cw1200_ether_type_filter {
+	struct wsm_ether_type_filter_hdr hdr;
+	/* Up to 4 filters are allowed. */
+	struct wsm_ether_type_filter filters[WSM_MAX_FILTER_ELEMENTS];
+} __packed;
+
+static struct cw1200_udp_port_filter cw1200_udp_port_filter_on = {
+	.hdr.num = 2,
+	.filters = {
+		[0] = {
+			.action = WSM_FILTER_ACTION_FILTER_OUT,
+			.type = WSM_FILTER_PORT_TYPE_DST,
+			.port = __cpu_to_le16(67), /* DHCP Bootps */
+		},
+		[1] = {
+			.action = WSM_FILTER_ACTION_FILTER_OUT,
+			.type = WSM_FILTER_PORT_TYPE_DST,
+			.port = __cpu_to_le16(68), /* DHCP Bootpc */
+		},
+	}
+};
+
+static struct wsm_udp_port_filter_hdr cw1200_udp_port_filter_off = {
+	.num = 0,
+};
+
+#ifndef ETH_P_WAPI
+#define ETH_P_WAPI     0x88B4
+#endif
+
+static struct cw1200_ether_type_filter cw1200_ether_type_filter_on = {
+	.hdr.num = 4,
+	.filters = {
+		[0] = {
+			.action = WSM_FILTER_ACTION_FILTER_IN,
+			.type = __cpu_to_le16(ETH_P_IP),
+		},
+		[1] = {
+			.action = WSM_FILTER_ACTION_FILTER_IN,
+			.type = __cpu_to_le16(ETH_P_PAE),
+		},
+		[2] = {
+			.action = WSM_FILTER_ACTION_FILTER_IN,
+			.type = __cpu_to_le16(ETH_P_WAPI),
+		},
+		[3] = {
+			.action = WSM_FILTER_ACTION_FILTER_IN,
+			.type = __cpu_to_le16(ETH_P_ARP),
+		},
+	},
+};
+
+static struct wsm_ether_type_filter_hdr cw1200_ether_type_filter_off = {
+	.num = 0,
+};
+
+/* private */
+struct cw1200_suspend_state {
+	unsigned long bss_loss_tmo;
+	unsigned long join_tmo;
+	unsigned long direct_probe;
+	unsigned long link_id_gc;
+	bool beacon_skipping;
+	u8 prev_ps_mode;
+};
+
+static void cw1200_pm_stay_awake_tmo(unsigned long arg)
+{
+	/* XXX what's the point of this ? */
+}
+
+int cw1200_pm_init(struct cw1200_pm_state *pm,
+		   struct cw1200_common *priv)
+{
+	spin_lock_init(&pm->lock);
+
+	init_timer(&pm->stay_awake);
+	pm->stay_awake.data = (unsigned long)pm;
+	pm->stay_awake.function = cw1200_pm_stay_awake_tmo;
+
+	return 0;
+}
+
+void cw1200_pm_deinit(struct cw1200_pm_state *pm)
+{
+	del_timer_sync(&pm->stay_awake);
+}
+
+void cw1200_pm_stay_awake(struct cw1200_pm_state *pm,
+			  unsigned long tmo)
+{
+	long cur_tmo;
+	spin_lock_bh(&pm->lock);
+	cur_tmo = pm->stay_awake.expires - jiffies;
+	if (!timer_pending(&pm->stay_awake) || cur_tmo < (long)tmo)
+		mod_timer(&pm->stay_awake, jiffies + tmo);
+	spin_unlock_bh(&pm->lock);
+}
+
+static long cw1200_suspend_work(struct delayed_work *work)
+{
+	int ret = cancel_delayed_work(work);
+	long tmo;
+	if (ret > 0) {
+		/* Timer is pending */
+		tmo = work->timer.expires - jiffies;
+		if (tmo < 0)
+			tmo = 0;
+	} else {
+		tmo = -1;
+	}
+	return tmo;
+}
+
+static int cw1200_resume_work(struct cw1200_common *priv,
+			       struct delayed_work *work,
+			       unsigned long tmo)
+{
+	if ((long)tmo < 0)
+		return 1;
+
+	return queue_delayed_work(priv->workqueue, work, tmo);
+}
+
+int cw1200_can_suspend(struct cw1200_common *priv)
+{
+	if (atomic_read(&priv->bh_rx)) {
+		wiphy_dbg(priv->hw->wiphy, "Suspend interrupted.\n");
+		return 0;
+	}
+	return 1;
+}
+EXPORT_SYMBOL_GPL(cw1200_can_suspend);
+
+int cw1200_wow_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
+{
+	struct cw1200_common *priv = hw->priv;
+	struct cw1200_pm_state *pm_state = &priv->pm_state;
+	struct cw1200_suspend_state *state;
+	int ret;
+
+	spin_lock_bh(&pm_state->lock);
+	ret = timer_pending(&pm_state->stay_awake);
+	spin_unlock_bh(&pm_state->lock);
+	if (ret)
+		return -EAGAIN;
+
+	/* Do not suspend when datapath is not idle */
+	if (priv->tx_queue_stats.num_queued)
+		return -EBUSY;
+
+	/* Make sure there is no configuration requests in progress. */
+	if (!mutex_trylock(&priv->conf_mutex))
+		return -EBUSY;
+
+	/* Ensure pending operations are done.
+	 * Note also that wow_suspend must return in ~2.5sec, before
+	 * watchdog is triggered.
+	 */
+	if (priv->channel_switch_in_progress)
+		goto revert1;
+
+	/* Do not suspend when join is pending */
+	if (priv->join_pending)
+		goto revert1;
+
+	/* Do not suspend when scanning */
+	if (down_trylock(&priv->scan.lock))
+		goto revert1;
+
+	/* Lock TX. */
+	wsm_lock_tx_async(priv);
+
+	/* Wait to avoid possible race with bh code.
+	 * But do not wait too long...
+	 */
+	if (wait_event_timeout(priv->bh_evt_wq,
+			       !priv->hw_bufs_used, HZ / 10) <= 0)
+		goto revert2;
+
+	/* Set UDP filter */
+	wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_on.hdr);
+
+	/* Set ethernet frame type filter */
+	wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_on.hdr);
+
+	/* Allocate state */
+	state = kzalloc(sizeof(struct cw1200_suspend_state), GFP_KERNEL);
+	if (!state)
+		goto revert3;
+
+	/* Change to legacy PS while going to suspend */
+	if (!priv->vif->p2p &&
+	    priv->join_status == CW1200_JOIN_STATUS_STA &&
+	    priv->powersave_mode.mode != WSM_PSM_PS) {
+		state->prev_ps_mode = priv->powersave_mode.mode;
+		priv->powersave_mode.mode = WSM_PSM_PS;
+		cw1200_set_pm(priv, &priv->powersave_mode);
+		if (wait_event_interruptible_timeout(priv->ps_mode_switch_done,
+						     !priv->ps_mode_switch_in_progress, 1*HZ) <= 0) {
+			goto revert3;
+		}
+	}
+
+	/* Store delayed work states. */
+	state->bss_loss_tmo =
+		cw1200_suspend_work(&priv->bss_loss_work);
+	state->join_tmo =
+		cw1200_suspend_work(&priv->join_timeout);
+	state->direct_probe =
+		cw1200_suspend_work(&priv->scan.probe_work);
+	state->link_id_gc =
+		cw1200_suspend_work(&priv->link_id_gc_work);
+
+	cancel_delayed_work_sync(&priv->clear_recent_scan_work);
+	atomic_set(&priv->recent_scan, 0);
+
+	/* Enable beacon skipping */
+	if (priv->join_status == CW1200_JOIN_STATUS_STA &&
+	    priv->join_dtim_period &&
+	    !priv->has_multicast_subscription) {
+		state->beacon_skipping = true;
+		wsm_set_beacon_wakeup_period(priv,
+					     priv->join_dtim_period,
+					     CW1200_BEACON_SKIPPING_MULTIPLIER * priv->join_dtim_period);
+	}
+
+	/* Stop serving thread */
+	if (cw1200_bh_suspend(priv))
+		goto revert4;
+
+	ret = timer_pending(&priv->mcast_timeout);
+	if (ret)
+		goto revert5;
+
+	/* Store suspend state */
+	pm_state->suspend_state = state;
+
+	/* Enable IRQ wake */
+	ret = priv->sbus_ops->power_mgmt(priv->sbus_priv, true);
+	if (ret) {
+		wiphy_err(priv->hw->wiphy,
+			  "PM request failed: %d. WoW is disabled.\n", ret);
+		cw1200_wow_resume(hw);
+		return -EBUSY;
+	}
+
+	/* Force resume if event is coming from the device. */
+	if (atomic_read(&priv->bh_rx)) {
+		cw1200_wow_resume(hw);
+		return -EAGAIN;
+	}
+
+	return 0;
+
+revert5:
+	WARN_ON(cw1200_bh_resume(priv));
+revert4:
+	cw1200_resume_work(priv, &priv->bss_loss_work,
+			   state->bss_loss_tmo);
+	cw1200_resume_work(priv, &priv->join_timeout,
+			   state->join_tmo);
+	cw1200_resume_work(priv, &priv->scan.probe_work,
+			   state->direct_probe);
+	cw1200_resume_work(priv, &priv->link_id_gc_work,
+			   state->link_id_gc);
+	kfree(state);
+revert3:
+	wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_off);
+	wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_off);
+revert2:
+	wsm_unlock_tx(priv);
+	up(&priv->scan.lock);
+revert1:
+	mutex_unlock(&priv->conf_mutex);
+	return -EBUSY;
+}
+
+int cw1200_wow_resume(struct ieee80211_hw *hw)
+{
+	struct cw1200_common *priv = hw->priv;
+	struct cw1200_pm_state *pm_state = &priv->pm_state;
+	struct cw1200_suspend_state *state;
+
+	state = pm_state->suspend_state;
+	pm_state->suspend_state = NULL;
+
+	/* Disable IRQ wake */
+	priv->sbus_ops->power_mgmt(priv->sbus_priv, false);
+
+	/* Scan.lock must be released before BH is resumed other way
+	 * in case when BSS_LOST command arrived the processing of the
+	 * command will be delayed.
+	 */
+	up(&priv->scan.lock);
+
+	/* Resume BH thread */
+	WARN_ON(cw1200_bh_resume(priv));
+
+	/* Restores previous PS mode */
+	if (!priv->vif->p2p && priv->join_status == CW1200_JOIN_STATUS_STA) {
+		priv->powersave_mode.mode = state->prev_ps_mode;
+		cw1200_set_pm(priv, &priv->powersave_mode);
+	}
+
+	if (state->beacon_skipping) {
+		wsm_set_beacon_wakeup_period(priv, priv->beacon_int *
+					     priv->join_dtim_period >
+					     MAX_BEACON_SKIP_TIME_MS ? 1 :
+					     priv->join_dtim_period, 0);
+		state->beacon_skipping = false;
+	}
+
+	/* Resume delayed work */
+	cw1200_resume_work(priv, &priv->bss_loss_work,
+			   state->bss_loss_tmo);
+	cw1200_resume_work(priv, &priv->join_timeout,
+			   state->join_tmo);
+	cw1200_resume_work(priv, &priv->scan.probe_work,
+			   state->direct_probe);
+	cw1200_resume_work(priv, &priv->link_id_gc_work,
+			   state->link_id_gc);
+
+	/* Remove UDP port filter */
+	wsm_set_udp_port_filter(priv, &cw1200_udp_port_filter_off);
+
+	/* Remove ethernet frame type filter */
+	wsm_set_ether_type_filter(priv, &cw1200_ether_type_filter_off);
+
+	/* Unlock datapath */
+	wsm_unlock_tx(priv);
+
+	/* Unlock configuration mutex */
+	mutex_unlock(&priv->conf_mutex);
+
+	/* Free memory */
+	kfree(state);
+
+	return 0;
+}

drivers/net/wireless/cw1200/pm.h

+/*
+ * Mac80211 power management interface for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2011, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef PM_H_INCLUDED
+#define PM_H_INCLUDED
+
+/* ******************************************************************** */
+/* mac80211 API								*/
+
+/* extern */  struct cw1200_common;
+/* private */ struct cw1200_suspend_state;
+
+struct cw1200_pm_state {
+	struct cw1200_suspend_state *suspend_state;
+	struct timer_list stay_awake;
+	struct platform_device *pm_dev;
+	spinlock_t lock; /* Protect access */
+};
+
+int cw1200_pm_init(struct cw1200_pm_state *pm,
+		    struct cw1200_common *priv);
+void cw1200_pm_deinit(struct cw1200_pm_state *pm);
+void cw1200_pm_stay_awake(struct cw1200_pm_state *pm,
+			  unsigned long tmo);
+int cw1200_wow_suspend(struct ieee80211_hw *hw,
+		       struct cfg80211_wowlan *wowlan);
+int cw1200_wow_resume(struct ieee80211_hw *hw);
+int cw1200_can_suspend(struct cw1200_common *priv);
+
+#endif

drivers/net/wireless/cw1200/queue.c

+/*
+ * O(1) TX queue with built-in allocator for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include <linux/sched.h>
+#include "queue.h"
+#include "cw1200.h"
+#include "debug.h"
+
+/* private */ struct cw1200_queue_item
+{
+	struct list_head	head;
+	struct sk_buff		*skb;
+	u32			packet_id;
+	unsigned long		queue_timestamp;
+	unsigned long		xmit_timestamp;
+	struct cw1200_txpriv	txpriv;
+	u8			generation;
+};
+
+static inline void __cw1200_queue_lock(struct cw1200_queue *queue)
+{
+	struct cw1200_queue_stats *stats = queue->stats;
+	if (queue->tx_locked_cnt++ == 0) {
+		pr_debug("[TX] Queue %d is locked.\n",
+			 queue->queue_id);
+		ieee80211_stop_queue(stats->priv->hw, queue->queue_id);
+	}
+}
+
+static inline void __cw1200_queue_unlock(struct cw1200_queue *queue)
+{
+	struct cw1200_queue_stats *stats = queue->stats;
+	BUG_ON(!queue->tx_locked_cnt);
+	if (--queue->tx_locked_cnt == 0) {
+		pr_debug("[TX] Queue %d is unlocked.\n",
+			 queue->queue_id);
+		ieee80211_wake_queue(stats->priv->hw, queue->queue_id);
+	}
+}
+
+static inline void cw1200_queue_parse_id(u32 packet_id, u8 *queue_generation,
+					 u8 *queue_id, u8 *item_generation,
+					 u8 *item_id)
+{
+	*item_id		= (packet_id >>  0) & 0xFF;
+	*item_generation	= (packet_id >>  8) & 0xFF;
+	*queue_id		= (packet_id >> 16) & 0xFF;
+	*queue_generation	= (packet_id >> 24) & 0xFF;
+}
+
+static inline u32 cw1200_queue_mk_packet_id(u8 queue_generation, u8 queue_id,
+					    u8 item_generation, u8 item_id)
+{
+	return ((u32)item_id << 0) |
+		((u32)item_generation << 8) |
+		((u32)queue_id << 16) |
+		((u32)queue_generation << 24);
+}
+
+static void cw1200_queue_post_gc(struct cw1200_queue_stats *stats,
+				 struct list_head *gc_list)
+{
+	struct cw1200_queue_item *item, *tmp;
+
+	list_for_each_entry_safe(item, tmp, gc_list, head) {
+		list_del(&item->head);
+		stats->skb_dtor(stats->priv, item->skb, &item->txpriv);
+		kfree(item);
+	}
+}
+
+static void cw1200_queue_register_post_gc(struct list_head *gc_list,
+					  struct cw1200_queue_item *item)
+{
+	struct cw1200_queue_item *gc_item;
+	gc_item = kmalloc(sizeof(struct cw1200_queue_item),
+			GFP_ATOMIC);
+	BUG_ON(!gc_item);
+	memcpy(gc_item, item, sizeof(struct cw1200_queue_item));
+	list_add_tail(&gc_item->head, gc_list);
+}
+
+static void __cw1200_queue_gc(struct cw1200_queue *queue,
+			      struct list_head *head,
+			      bool unlock)
+{
+	struct cw1200_queue_stats *stats = queue->stats;
+	struct cw1200_queue_item *item = NULL, *tmp;
+	bool wakeup_stats = false;
+
+	list_for_each_entry_safe(item, tmp, &queue->queue, head) {
+		if (jiffies - item->queue_timestamp < queue->ttl)
+			break;
+		--queue->num_queued;
+		--queue->link_map_cache[item->txpriv.link_id];
+		spin_lock_bh(&stats->lock);
+		--stats->num_queued;
+		if (!--stats->link_map_cache[item->txpriv.link_id])
+			wakeup_stats = true;
+		spin_unlock_bh(&stats->lock);
+		cw1200_debug_tx_ttl(stats->priv);
+		cw1200_queue_register_post_gc(head, item);
+		item->skb = NULL;
+		list_move_tail(&item->head, &queue->free_pool);
+	}
+
+	if (wakeup_stats)
+		wake_up(&stats->wait_link_id_empty);
+
+	if (queue->overfull) {
+		if (queue->num_queued <= (queue->capacity >> 1)) {
+			queue->overfull = false;
+			if (unlock)
+				__cw1200_queue_unlock(queue);
+		} else if (item) {
+			unsigned long tmo = item->queue_timestamp + queue->ttl;
+			mod_timer(&queue->gc, tmo);
+			cw1200_pm_stay_awake(&stats->priv->pm_state,
+					     tmo - jiffies);
+		}
+	}
+}
+
+static void cw1200_queue_gc(unsigned long arg)
+{
+	LIST_HEAD(list);
+	struct cw1200_queue *queue =
+		(struct cw1200_queue *)arg;
+
+	spin_lock_bh(&queue->lock);
+	__cw1200_queue_gc(queue, &list, true);
+	spin_unlock_bh(&queue->lock);
+	cw1200_queue_post_gc(queue->stats, &list);
+}
+
+int cw1200_queue_stats_init(struct cw1200_queue_stats *stats,
+			    size_t map_capacity,
+			    cw1200_queue_skb_dtor_t skb_dtor,
+			    struct cw1200_common *priv)
+{
+	memset(stats, 0, sizeof(*stats));
+	stats->map_capacity = map_capacity;
+	stats->skb_dtor = skb_dtor;
+	stats->priv = priv;
+	spin_lock_init(&stats->lock);
+	init_waitqueue_head(&stats->wait_link_id_empty);
+
+	stats->link_map_cache = kzalloc(sizeof(int) * map_capacity,
+					GFP_KERNEL);
+	if (!stats->link_map_cache)
+		return -ENOMEM;
+
+	return 0;
+}
+
+int cw1200_queue_init(struct cw1200_queue *queue,
+		      struct cw1200_queue_stats *stats,
+		      u8 queue_id,
+		      size_t capacity,
+		      unsigned long ttl)
+{
+	size_t i;
+
+	memset(queue, 0, sizeof(*queue));
+	queue->stats = stats;
+	queue->capacity = capacity;
+	queue->queue_id = queue_id;
+	queue->ttl = ttl;
+	INIT_LIST_HEAD(&queue->queue);
+	INIT_LIST_HEAD(&queue->pending);
+	INIT_LIST_HEAD(&queue->free_pool);
+	spin_lock_init(&queue->lock);
+	init_timer(&queue->gc);
+	queue->gc.data = (unsigned long)queue;
+	queue->gc.function = cw1200_queue_gc;
+
+	queue->pool = kzalloc(sizeof(struct cw1200_queue_item) * capacity,
+			GFP_KERNEL);
+	if (!queue->pool)
+		return -ENOMEM;
+
+	queue->link_map_cache = kzalloc(sizeof(int) * stats->map_capacity,
+			GFP_KERNEL);
+	if (!queue->link_map_cache) {
+		kfree(queue->pool);
+		queue->pool = NULL;
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < capacity; ++i)
+		list_add_tail(&queue->pool[i].head, &queue->free_pool);
+
+	return 0;
+}
+
+int cw1200_queue_clear(struct cw1200_queue *queue)
+{
+	int i;
+	LIST_HEAD(gc_list);
+	struct cw1200_queue_stats *stats = queue->stats;
+	struct cw1200_queue_item *item, *tmp;
+
+	spin_lock_bh(&queue->lock);
+	queue->generation++;
+	list_splice_tail_init(&queue->queue, &queue->pending);
+	list_for_each_entry_safe(item, tmp, &queue->pending, head) {
+		WARN_ON(!item->skb);
+		cw1200_queue_register_post_gc(&gc_list, item);
+		item->skb = NULL;
+		list_move_tail(&item->head, &queue->free_pool);
+	}
+	queue->num_queued = 0;
+	queue->num_pending = 0;
+
+	spin_lock_bh(&stats->lock);
+	for (i = 0; i < stats->map_capacity; ++i) {
+		stats->num_queued -= queue->link_map_cache[i];
+		stats->link_map_cache[i] -= queue->link_map_cache[i];
+		queue->link_map_cache[i] = 0;
+	}
+	spin_unlock_bh(&stats->lock);
+	if (queue->overfull) {
+		queue->overfull = false;
+		__cw1200_queue_unlock(queue);
+	}
+	spin_unlock_bh(&queue->lock);
+	wake_up(&stats->wait_link_id_empty);
+	cw1200_queue_post_gc(stats, &gc_list);
+	return 0;
+}
+
+void cw1200_queue_stats_deinit(struct cw1200_queue_stats *stats)
+{
+	kfree(stats->link_map_cache);
+	stats->link_map_cache = NULL;
+}
+
+void cw1200_queue_deinit(struct cw1200_queue *queue)
+{
+	cw1200_queue_clear(queue);
+	del_timer_sync(&queue->gc);
+	INIT_LIST_HEAD(&queue->free_pool);
+	kfree(queue->pool);
+	kfree(queue->link_map_cache);
+	queue->pool = NULL;
+	queue->link_map_cache = NULL;
+	queue->capacity = 0;
+}
+
+size_t cw1200_queue_get_num_queued(struct cw1200_queue *queue,
+				   u32 link_id_map)
+{
+	size_t ret;
+	int i, bit;
+	size_t map_capacity = queue->stats->map_capacity;
+
+	if (!link_id_map)
+		return 0;
+
+	spin_lock_bh(&queue->lock);
+	if (link_id_map == (u32)-1) {
+		ret = queue->num_queued - queue->num_pending;
+	} else {
+		ret = 0;
+		for (i = 0, bit = 1; i < map_capacity; ++i, bit <<= 1) {
+			if (link_id_map & bit)
+				ret += queue->link_map_cache[i];
+		}
+	}
+	spin_unlock_bh(&queue->lock);
+	return ret;
+}
+
+int cw1200_queue_put(struct cw1200_queue *queue,
+		     struct sk_buff *skb,
+		     struct cw1200_txpriv *txpriv)
+{
+	int ret = 0;
+	LIST_HEAD(gc_list);
+	struct cw1200_queue_stats *stats = queue->stats;
+
+	if (txpriv->link_id >= queue->stats->map_capacity)
+		return -EINVAL;
+
+	spin_lock_bh(&queue->lock);
+	if (!WARN_ON(list_empty(&queue->free_pool))) {
+		struct cw1200_queue_item *item = list_first_entry(
+			&queue->free_pool, struct cw1200_queue_item, head);
+		BUG_ON(item->skb);
+
+		list_move_tail(&item->head, &queue->queue);
+		item->skb = skb;
+		item->txpriv = *txpriv;
+		item->generation = 0;
+		item->packet_id = cw1200_queue_mk_packet_id(queue->generation,
+							    queue->queue_id,
+							    item->generation,
+							    item - queue->pool);
+		item->queue_timestamp = jiffies;
+
+		++queue->num_queued;
+		++queue->link_map_cache[txpriv->link_id];
+
+		spin_lock_bh(&stats->lock);
+		++stats->num_queued;
+		++stats->link_map_cache[txpriv->link_id];
+		spin_unlock_bh(&stats->lock);
+
+		/* TX may happen in parallel sometimes.
+		 * Leave extra queue slots so we don't overflow.
+		 */
+		if (queue->overfull == false &&
+		    queue->num_queued >=
+		    (queue->capacity - (num_present_cpus() - 1))) {
+			queue->overfull = true;
+			__cw1200_queue_lock(queue);
+			mod_timer(&queue->gc, jiffies);
+		}
+	} else {
+		ret = -ENOENT;
+	}
+	spin_unlock_bh(&queue->lock);
+	return ret;
+}
+
+int cw1200_queue_get(struct cw1200_queue *queue,
+		     u32 link_id_map,
+		     struct wsm_tx **tx,
+		     struct ieee80211_tx_info **tx_info,
+		     const struct cw1200_txpriv **txpriv)
+{
+	int ret = -ENOENT;
+	struct cw1200_queue_item *item;
+	struct cw1200_queue_stats *stats = queue->stats;
+	bool wakeup_stats = false;
+
+	spin_lock_bh(&queue->lock);
+	list_for_each_entry(item, &queue->queue, head) {
+		if (link_id_map & BIT(item->txpriv.link_id)) {
+			ret = 0;
+			break;
+		}
+	}
+
+	if (!WARN_ON(ret)) {
+		*tx = (struct wsm_tx *)item->skb->data;
+		*tx_info = IEEE80211_SKB_CB(item->skb);
+		*txpriv = &item->txpriv;
+		(*tx)->packet_id = __cpu_to_le32(item->packet_id);
+		list_move_tail(&item->head, &queue->pending);
+		++queue->num_pending;
+		--queue->link_map_cache[item->txpriv.link_id];
+		item->xmit_timestamp = jiffies;
+
+		spin_lock_bh(&stats->lock);
+		--stats->num_queued;
+		if (!--stats->link_map_cache[item->txpriv.link_id])
+			wakeup_stats = true;
+		spin_unlock_bh(&stats->lock);
+	}
+	spin_unlock_bh(&queue->lock);
+	if (wakeup_stats)
+		wake_up(&stats->wait_link_id_empty);
+	return ret;
+}
+
+int cw1200_queue_requeue(struct cw1200_queue *queue, u32 packet_id)
+{
+	int ret = 0;
+	u8 queue_generation, queue_id, item_generation, item_id;
+	struct cw1200_queue_item *item;
+	struct cw1200_queue_stats *stats = queue->stats;
+
+	cw1200_queue_parse_id(packet_id, &queue_generation, &queue_id,
+			      &item_generation, &item_id);
+
+	item = &queue->pool[item_id];
+
+	spin_lock_bh(&queue->lock);
+	BUG_ON(queue_id != queue->queue_id);
+	if (queue_generation != queue->generation) {
+		ret = -ENOENT;
+	} else if (item_id >= (unsigned) queue->capacity) {
+		WARN_ON(1);
+		ret = -EINVAL;
+	} else if (item->generation != item_generation) {
+		WARN_ON(1);
+		ret = -ENOENT;
+	} else {
+		--queue->num_pending;
+		++queue->link_map_cache[item->txpriv.link_id];
+
+		spin_lock_bh(&stats->lock);
+		++stats->num_queued;
+		++stats->link_map_cache[item->txpriv.link_id];
+		spin_unlock_bh(&stats->lock);
+
+		item->generation = ++item_generation;
+		item->packet_id = cw1200_queue_mk_packet_id(queue_generation,
+							    queue_id,
+							    item_generation,
+							    item_id);
+		list_move(&item->head, &queue->queue);
+	}
+	spin_unlock_bh(&queue->lock);
+	return ret;
+}
+
+int cw1200_queue_requeue_all(struct cw1200_queue *queue)
+{
+	struct cw1200_queue_item *item, *tmp;
+	struct cw1200_queue_stats *stats = queue->stats;
+	spin_lock_bh(&queue->lock);
+
+	list_for_each_entry_safe_reverse(item, tmp, &queue->pending, head) {
+		--queue->num_pending;
+		++queue->link_map_cache[item->txpriv.link_id];
+
+		spin_lock_bh(&stats->lock);
+		++stats->num_queued;
+		++stats->link_map_cache[item->txpriv.link_id];
+		spin_unlock_bh(&stats->lock);
+
+		++item->generation;
+		item->packet_id = cw1200_queue_mk_packet_id(queue->generation,
+							    queue->queue_id,
+							    item->generation,
+							    item - queue->pool);
+		list_move(&item->head, &queue->queue);
+	}
+	spin_unlock_bh(&queue->lock);
+
+	return 0;
+}
+
+int cw1200_queue_remove(struct cw1200_queue *queue, u32 packet_id)
+{
+	int ret = 0;
+	u8 queue_generation, queue_id, item_generation, item_id;
+	struct cw1200_queue_item *item;
+	struct cw1200_queue_stats *stats = queue->stats;
+	struct sk_buff *gc_skb = NULL;
+	struct cw1200_txpriv gc_txpriv;
+
+	cw1200_queue_parse_id(packet_id, &queue_generation, &queue_id,
+			      &item_generation, &item_id);
+
+	item = &queue->pool[item_id];
+
+	spin_lock_bh(&queue->lock);
+	BUG_ON(queue_id != queue->queue_id);
+	if (queue_generation != queue->generation) {
+		ret = -ENOENT;
+	} else if (item_id >= (unsigned) queue->capacity) {
+		WARN_ON(1);
+		ret = -EINVAL;
+	} else if (item->generation != item_generation) {
+		WARN_ON(1);
+		ret = -ENOENT;
+	} else {
+		gc_txpriv = item->txpriv;
+		gc_skb = item->skb;
+		item->skb = NULL;
+		--queue->num_pending;
+		--queue->num_queued;
+		++queue->num_sent;
+		++item->generation;
+		/* Do not use list_move_tail here, but list_move:
+		 * try to utilize cache row.
+		 */
+		list_move(&item->head, &queue->free_pool);
+
+		if (queue->overfull &&
+		    (queue->num_queued <= (queue->capacity >> 1))) {
+			queue->overfull = false;
+			__cw1200_queue_unlock(queue);
+		}
+	}
+	spin_unlock_bh(&queue->lock);
+
+	if (gc_skb)
+		stats->skb_dtor(stats->priv, gc_skb, &gc_txpriv);
+
+	return ret;
+}
+
+int cw1200_queue_get_skb(struct cw1200_queue *queue, u32 packet_id,
+			 struct sk_buff **skb,
+			 const struct cw1200_txpriv **txpriv)
+{
+	int ret = 0;
+	u8 queue_generation, queue_id, item_generation, item_id;
+	struct cw1200_queue_item *item;
+	cw1200_queue_parse_id(packet_id, &queue_generation, &queue_id,
+			      &item_generation, &item_id);
+
+	item = &queue->pool[item_id];
+
+	spin_lock_bh(&queue->lock);
+	BUG_ON(queue_id != queue->queue_id);
+	if (queue_generation != queue->generation) {
+		ret = -ENOENT;
+	} else if (item_id >= (unsigned) queue->capacity) {
+		WARN_ON(1);
+		ret = -EINVAL;
+	} else if (item->generation != item_generation) {
+		WARN_ON(1);
+		ret = -ENOENT;
+	} else {
+		*skb = item->skb;
+		*txpriv = &item->txpriv;
+	}
+	spin_unlock_bh(&queue->lock);
+	return ret;
+}
+
+void cw1200_queue_lock(struct cw1200_queue *queue)
+{
+	spin_lock_bh(&queue->lock);
+	__cw1200_queue_lock(queue);
+	spin_unlock_bh(&queue->lock);
+}
+
+void cw1200_queue_unlock(struct cw1200_queue *queue)
+{
+	spin_lock_bh(&queue->lock);
+	__cw1200_queue_unlock(queue);
+	spin_unlock_bh(&queue->lock);
+}
+
+bool cw1200_queue_get_xmit_timestamp(struct cw1200_queue *queue,
+				     unsigned long *timestamp,
+				     u32 pending_frame_id)
+{
+	struct cw1200_queue_item *item;
+	bool ret;
+
+	spin_lock_bh(&queue->lock);
+	ret = !list_empty(&queue->pending);
+	if (ret) {
+		list_for_each_entry(item, &queue->pending, head) {
+			if (item->packet_id != pending_frame_id)
+				if (time_before(item->xmit_timestamp,
+						*timestamp))
+					*timestamp = item->xmit_timestamp;
+		}
+	}
+	spin_unlock_bh(&queue->lock);
+	return ret;
+}
+
+bool cw1200_queue_stats_is_empty(struct cw1200_queue_stats *stats,
+				 u32 link_id_map)
+{
+	bool empty = true;
+
+	spin_lock_bh(&stats->lock);
+	if (link_id_map == (u32)-1) {
+		empty = stats->num_queued == 0;
+	} else {
+		int i;
+		for (i = 0; i < stats->map_capacity; ++i) {
+			if (link_id_map & BIT(i)) {
+				if (stats->link_map_cache[i]) {
+					empty = false;
+					break;
+				}
+			}
+		}
+	}
+	spin_unlock_bh(&stats->lock);
+
+	return empty;
+}

drivers/net/wireless/cw1200/queue.h

+/*
+ * O(1) TX queue with built-in allocator for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_QUEUE_H_INCLUDED
+#define CW1200_QUEUE_H_INCLUDED
+
+/* private */ struct cw1200_queue_item;
+
+/* extern */ struct sk_buff;
+/* extern */ struct wsm_tx;
+/* extern */ struct cw1200_common;
+/* extern */ struct ieee80211_tx_queue_stats;
+/* extern */ struct cw1200_txpriv;
+
+/* forward */ struct cw1200_queue_stats;
+
+typedef void (*cw1200_queue_skb_dtor_t)(struct cw1200_common *priv,
+					struct sk_buff *skb,
+					const struct cw1200_txpriv *txpriv);
+
+struct cw1200_queue {
+	struct cw1200_queue_stats *stats;
+	size_t			capacity;
+	size_t			num_queued;
+	size_t			num_pending;
+	size_t			num_sent;
+	struct cw1200_queue_item *pool;
+	struct list_head	queue;
+	struct list_head	free_pool;
+	struct list_head	pending;
+	int			tx_locked_cnt;
+	int			*link_map_cache;
+	bool			overfull;
+	spinlock_t		lock; /* Protect queue entry */
+	u8			queue_id;
+	u8			generation;
+	struct timer_list	gc;
+	unsigned long		ttl;
+};
+
+struct cw1200_queue_stats {
+	spinlock_t		lock; /* Protect stats entry */
+	int			*link_map_cache;
+	int			num_queued;
+	size_t			map_capacity;
+	wait_queue_head_t	wait_link_id_empty;
+	cw1200_queue_skb_dtor_t	skb_dtor;
+	struct cw1200_common	*priv;
+};
+
+struct cw1200_txpriv {
+	u8 link_id;
+	u8 raw_link_id;
+	u8 tid;
+	u8 rate_id;
+	u8 offset;
+};
+
+int cw1200_queue_stats_init(struct cw1200_queue_stats *stats,
+			    size_t map_capacity,
+			    cw1200_queue_skb_dtor_t skb_dtor,
+			    struct cw1200_common *priv);
+int cw1200_queue_init(struct cw1200_queue *queue,
+		      struct cw1200_queue_stats *stats,
+		      u8 queue_id,
+		      size_t capacity,
+		      unsigned long ttl);
+int cw1200_queue_clear(struct cw1200_queue *queue);
+void cw1200_queue_stats_deinit(struct cw1200_queue_stats *stats);
+void cw1200_queue_deinit(struct cw1200_queue *queue);
+
+size_t cw1200_queue_get_num_queued(struct cw1200_queue *queue,
+				   u32 link_id_map);
+int cw1200_queue_put(struct cw1200_queue *queue,
+		     struct sk_buff *skb,
+		     struct cw1200_txpriv *txpriv);
+int cw1200_queue_get(struct cw1200_queue *queue,
+		     u32 link_id_map,
+		     struct wsm_tx **tx,
+		     struct ieee80211_tx_info **tx_info,
+		     const struct cw1200_txpriv **txpriv);
+int cw1200_queue_requeue(struct cw1200_queue *queue, u32 packet_id);
+int cw1200_queue_requeue_all(struct cw1200_queue *queue);
+int cw1200_queue_remove(struct cw1200_queue *queue,
+			u32 packet_id);
+int cw1200_queue_get_skb(struct cw1200_queue *queue, u32 packet_id,
+			 struct sk_buff **skb,
+			 const struct cw1200_txpriv **txpriv);
+void cw1200_queue_lock(struct cw1200_queue *queue);
+void cw1200_queue_unlock(struct cw1200_queue *queue);
+bool cw1200_queue_get_xmit_timestamp(struct cw1200_queue *queue,
+				     unsigned long *timestamp,
+				     u32 pending_frame_id);
+
+bool cw1200_queue_stats_is_empty(struct cw1200_queue_stats *stats,
+				 u32 link_id_map);
+
+static inline u8 cw1200_queue_get_queue_id(u32 packet_id)
+{
+	return (packet_id >> 16) & 0xFF;
+}
+
+static inline u8 cw1200_queue_get_generation(u32 packet_id)
+{
+	return (packet_id >>  8) & 0xFF;
+}
+
+#endif /* CW1200_QUEUE_H_INCLUDED */

drivers/net/wireless/cw1200/sbus.h

+/*
+ * Common sbus abstraction layer interface for cw1200 wireless driver
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_SBUS_H
+#define CW1200_SBUS_H
+
+/*
+ * sbus priv forward definition.
+ * Implemented and instantiated in particular modules.
+ */
+struct sbus_priv;
+
+void cw1200_irq_handler(struct cw1200_common *priv);
+
+/* This MUST be wrapped with sbus_ops->lock/unlock! */
+int __cw1200_irq_enable(struct cw1200_common *priv, int enable);
+
+struct sbus_ops {
+	int (*sbus_memcpy_fromio)(struct sbus_priv *self, unsigned int addr,
+					void *dst, int count);
+	int (*sbus_memcpy_toio)(struct sbus_priv *self, unsigned int addr,
+					const void *src, int count);
+	void (*lock)(struct sbus_priv *self);
+	void (*unlock)(struct sbus_priv *self);
+	size_t (*align_size)(struct sbus_priv *self, size_t size);
+	int (*power_mgmt)(struct sbus_priv *self, bool suspend);
+};
+
+#endif /* CW1200_SBUS_H */

drivers/net/wireless/cw1200/scan.c

+/*
+ * Scan implementation for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/sched.h>
+#include "cw1200.h"
+#include "scan.h"
+#include "sta.h"
+#include "pm.h"
+
+static void cw1200_scan_restart_delayed(struct cw1200_common *priv);
+
+static int cw1200_scan_start(struct cw1200_common *priv, struct wsm_scan *scan)
+{
+	int ret, i;
+	int tmo = 2000;
+
+	switch (priv->join_status) {
+	case CW1200_JOIN_STATUS_PRE_STA:
+	case CW1200_JOIN_STATUS_JOINING:
+		return -EBUSY;
+	default:
+		break;
+	}
+
+	wiphy_dbg(priv->hw->wiphy, "[SCAN] hw req, type %d, %d channels, flags: 0x%x.\n",
+		  scan->type, scan->num_channels, scan->flags);
+
+	for (i = 0; i < scan->num_channels; ++i)
+		tmo += scan->ch[i].max_chan_time + 10;
+
+	cancel_delayed_work_sync(&priv->clear_recent_scan_work);
+	atomic_set(&priv->scan.in_progress, 1);
+	atomic_set(&priv->recent_scan, 1);
+	cw1200_pm_stay_awake(&priv->pm_state, tmo * HZ / 1000);
+	queue_delayed_work(priv->workqueue, &priv->scan.timeout,
+			   tmo * HZ / 1000);
+	ret = wsm_scan(priv, scan);
+	if (ret) {
+		atomic_set(&priv->scan.in_progress, 0);
+		cancel_delayed_work_sync(&priv->scan.timeout);
+		cw1200_scan_restart_delayed(priv);
+	}
+	return ret;
+}
+
+int cw1200_hw_scan(struct ieee80211_hw *hw,
+		   struct ieee80211_vif *vif,
+		   struct cfg80211_scan_request *req)
+{
+	struct cw1200_common *priv = hw->priv;
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_PROBE_REQUEST,
+	};
+	int i, ret;
+
+	if (!priv->vif)
+		return -EINVAL;
+
+	/* Scan when P2P_GO corrupt firmware MiniAP mode */
+	if (priv->join_status == CW1200_JOIN_STATUS_AP)
+		return -EOPNOTSUPP;
+
+	if (req->n_ssids == 1 && !req->ssids[0].ssid_len)
+		req->n_ssids = 0;
+
+	wiphy_dbg(hw->wiphy, "[SCAN] Scan request for %d SSIDs.\n",
+		  req->n_ssids);
+
+	if (req->n_ssids > WSM_SCAN_MAX_NUM_OF_SSIDS)
+		return -EINVAL;
+
+	frame.skb = ieee80211_probereq_get(hw, priv->vif, NULL, 0,
+		req->ie_len);
+	if (!frame.skb)
+		return -ENOMEM;
+
+	if (req->ie_len)
+		memcpy(skb_put(frame.skb, req->ie_len), req->ie, req->ie_len);
+
+	/* will be unlocked in cw1200_scan_work() */
+	down(&priv->scan.lock);
+	mutex_lock(&priv->conf_mutex);
+
+	ret = wsm_set_template_frame(priv, &frame);
+	if (!ret) {
+		/* Host want to be the probe responder. */
+		ret = wsm_set_probe_responder(priv, true);
+	}
+	if (ret) {
+		mutex_unlock(&priv->conf_mutex);
+		up(&priv->scan.lock);
+		dev_kfree_skb(frame.skb);
+		return ret;
+	}
+
+	wsm_lock_tx(priv);
+
+	BUG_ON(priv->scan.req);
+	priv->scan.req = req;
+	priv->scan.n_ssids = 0;
+	priv->scan.status = 0;
+	priv->scan.begin = &req->channels[0];
+	priv->scan.curr = priv->scan.begin;
+	priv->scan.end = &req->channels[req->n_channels];
+	priv->scan.output_power = priv->output_power;
+
+	for (i = 0; i < req->n_ssids; ++i) {
+		struct wsm_ssid *dst = &priv->scan.ssids[priv->scan.n_ssids];
+		memcpy(&dst->ssid[0], req->ssids[i].ssid, sizeof(dst->ssid));
+		dst->length = req->ssids[i].ssid_len;
+		++priv->scan.n_ssids;
+	}
+
+	mutex_unlock(&priv->conf_mutex);
+
+	if (frame.skb)
+		dev_kfree_skb(frame.skb);
+	queue_work(priv->workqueue, &priv->scan.work);
+	return 0;
+}
+
+void cw1200_scan_work(struct work_struct *work)
+{
+	struct cw1200_common *priv = container_of(work, struct cw1200_common,
+							scan.work);
+	struct ieee80211_channel **it;
+	struct wsm_scan scan = {
+		.type = WSM_SCAN_TYPE_FOREGROUND,
+		.flags = WSM_SCAN_FLAG_SPLIT_METHOD,
+	};
+	bool first_run = (priv->scan.begin == priv->scan.curr &&
+			  priv->scan.begin != priv->scan.end);
+	int i;
+
+	if (first_run) {
+		/* Firmware gets crazy if scan request is sent
+		 * when STA is joined but not yet associated.
+		 * Force unjoin in this case.
+		 */
+		if (cancel_delayed_work_sync(&priv->join_timeout) > 0)
+			cw1200_join_timeout(&priv->join_timeout.work);
+	}
+
+	mutex_lock(&priv->conf_mutex);
+
+	if (first_run) {
+		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
+		    !(priv->powersave_mode.mode & WSM_PSM_PS)) {
+			struct wsm_set_pm pm = priv->powersave_mode;
+			pm.mode = WSM_PSM_PS;
+			cw1200_set_pm(priv, &pm);
+		} else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
+			/* FW bug: driver has to restart p2p-dev mode
+			 * after scan
+			 */
+			cw1200_disable_listening(priv);
+		}
+	}
+
+	if (!priv->scan.req || (priv->scan.curr == priv->scan.end)) {
+		if (priv->scan.output_power != priv->output_power)
+			wsm_set_output_power(priv, priv->output_power * 10);
+		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
+		    !(priv->powersave_mode.mode & WSM_PSM_PS))
+			cw1200_set_pm(priv, &priv->powersave_mode);
+
+		if (priv->scan.status < 0)
+			wiphy_dbg(priv->hw->wiphy, "[SCAN] Scan failed (%d).\n",
+				  priv->scan.status);
+		else if (priv->scan.req)
+			wiphy_dbg(priv->hw->wiphy,
+				  "[SCAN] Scan completed.\n");
+		else
+			wiphy_dbg(priv->hw->wiphy,
+				  "[SCAN] Scan canceled.\n");
+
+		priv->scan.req = NULL;
+		cw1200_scan_restart_delayed(priv);
+		wsm_unlock_tx(priv);
+		mutex_unlock(&priv->conf_mutex);
+		ieee80211_scan_completed(priv->hw, priv->scan.status ? 1 : 0);
+		up(&priv->scan.lock);
+		return;
+	} else {
+		struct ieee80211_channel *first = *priv->scan.curr;
+		for (it = priv->scan.curr + 1, i = 1;
+		     it != priv->scan.end && i < WSM_SCAN_MAX_NUM_OF_CHANNELS;
+		     ++it, ++i) {
+			if ((*it)->band != first->band)
+				break;
+			if (((*it)->flags ^ first->flags) &
+					IEEE80211_CHAN_PASSIVE_SCAN)
+				break;
+			if (!(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
+			    (*it)->max_power != first->max_power)
+				break;
+		}
+		scan.band = first->band;
+
+		if (priv->scan.req->no_cck)
+			scan.max_tx_rate = WSM_TRANSMIT_RATE_6;
+		else
+			scan.max_tx_rate = WSM_TRANSMIT_RATE_1;
+		scan.num_probes =
+			(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) ? 0 : 2;
+		scan.num_ssids = priv->scan.n_ssids;
+		scan.ssids = &priv->scan.ssids[0];
+		scan.num_channels = it - priv->scan.curr;
+		/* TODO: Is it optimal? */
+		scan.probe_delay = 100;
+		/* It is not stated in WSM specification, however
+		 * FW team says that driver may not use FG scan
+		 * when joined.
+		 */
+		if (priv->join_status == CW1200_JOIN_STATUS_STA) {
+			scan.type = WSM_SCAN_TYPE_BACKGROUND;
+			scan.flags = WSM_SCAN_FLAG_FORCE_BACKGROUND;
+		}
+		scan.ch = kzalloc(
+			sizeof(struct wsm_scan_ch) * (it - priv->scan.curr),
+			GFP_KERNEL);
+		if (!scan.ch) {
+			priv->scan.status = -ENOMEM;
+			goto fail;
+		}
+		for (i = 0; i < scan.num_channels; ++i) {
+			scan.ch[i].number = priv->scan.curr[i]->hw_value;
+			if (priv->scan.curr[i]->flags & IEEE80211_CHAN_PASSIVE_SCAN) {
+				scan.ch[i].min_chan_time = 50;
+				scan.ch[i].max_chan_time = 100;
+			} else {
+				scan.ch[i].min_chan_time = 10;
+				scan.ch[i].max_chan_time = 25;
+			}
+		}
+		if (!(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
+		    priv->scan.output_power != first->max_power) {
+			priv->scan.output_power = first->max_power;
+			wsm_set_output_power(priv,
+					     priv->scan.output_power * 10);
+		}
+		priv->scan.status = cw1200_scan_start(priv, &scan);
+		kfree(scan.ch);
+		if (priv->scan.status)
+			goto fail;
+		priv->scan.curr = it;
+	}
+	mutex_unlock(&priv->conf_mutex);
+	return;
+
+fail:
+	priv->scan.curr = priv->scan.end;
+	mutex_unlock(&priv->conf_mutex);
+	queue_work(priv->workqueue, &priv->scan.work);
+	return;
+}
+
+static void cw1200_scan_restart_delayed(struct cw1200_common *priv)
+{
+	/* FW bug: driver has to restart p2p-dev mode after scan. */
+	if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
+		cw1200_enable_listening(priv);
+		cw1200_update_filtering(priv);
+	}
+
+	if (priv->delayed_unjoin) {
+		priv->delayed_unjoin = false;
+		if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+			wsm_unlock_tx(priv);
+	} else if (priv->delayed_link_loss) {
+			wiphy_dbg(priv->hw->wiphy, "[CQM] Requeue BSS loss.\n");
+			priv->delayed_link_loss = 0;
+			cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
+	}
+}
+
+static void cw1200_scan_complete(struct cw1200_common *priv)
+{
+	queue_delayed_work(priv->workqueue, &priv->clear_recent_scan_work, HZ);
+	if (priv->scan.direct_probe) {
+		wiphy_dbg(priv->hw->wiphy, "[SCAN] Direct probe complete.\n");
+		cw1200_scan_restart_delayed(priv);
+		priv->scan.direct_probe = 0;
+		up(&priv->scan.lock);
+		wsm_unlock_tx(priv);
+	} else {
+		cw1200_scan_work(&priv->scan.work);
+	}
+}
+
+void cw1200_scan_failed_cb(struct cw1200_common *priv)
+{
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		/* STA is stopped. */
+		return;
+
+	if (cancel_delayed_work_sync(&priv->scan.timeout) > 0) {
+		priv->scan.status = -EIO;
+		queue_delayed_work(priv->workqueue, &priv->scan.timeout, 0);
+	}
+}
+
+
+void cw1200_scan_complete_cb(struct cw1200_common *priv,
+				struct wsm_scan_complete *arg)
+{
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		/* STA is stopped. */
+		return;
+
+	if (cancel_delayed_work_sync(&priv->scan.timeout) > 0) {
+		priv->scan.status = 1;
+		queue_delayed_work(priv->workqueue, &priv->scan.timeout, 0);
+	}
+}
+
+void cw1200_clear_recent_scan_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common,
+			     clear_recent_scan_work.work);
+	atomic_xchg(&priv->recent_scan, 0);
+}
+
+void cw1200_scan_timeout(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, scan.timeout.work);
+	if (atomic_xchg(&priv->scan.in_progress, 0)) {
+		if (priv->scan.status > 0) {
+			priv->scan.status = 0;
+		} else if (!priv->scan.status) {
+			wiphy_warn(priv->hw->wiphy,
+				   "Timeout waiting for scan complete notification.\n");
+			priv->scan.status = -ETIMEDOUT;
+			priv->scan.curr = priv->scan.end;
+			wsm_stop_scan(priv);
+		}
+		cw1200_scan_complete(priv);
+	}
+}
+
+void cw1200_probe_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, scan.probe_work.work);
+	u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
+	struct cw1200_queue *queue = &priv->tx_queue[queue_id];
+	const struct cw1200_txpriv *txpriv;
+	struct wsm_tx *wsm;
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_PROBE_REQUEST,
+	};
+	struct wsm_ssid ssids[1] = {{
+		.length = 0,
+	} };
+	struct wsm_scan_ch ch[1] = {{
+		.min_chan_time = 0,
+		.max_chan_time = 10,
+	} };
+	struct wsm_scan scan = {
+		.type = WSM_SCAN_TYPE_FOREGROUND,
+		.num_probes = 1,
+		.probe_delay = 0,
+		.num_channels = 1,
+		.ssids = ssids,
+		.ch = ch,
+	};
+	u8 *ies;
+	size_t ies_len;
+	int ret;
+
+	wiphy_dbg(priv->hw->wiphy, "[SCAN] Direct probe work.\n");
+
+	mutex_lock(&priv->conf_mutex);
+	if (down_trylock(&priv->scan.lock)) {
+		/* Scan is already in progress. Requeue self. */
+		schedule();
+		queue_delayed_work(priv->workqueue,
+				   &priv->scan.probe_work, HZ / 10);
+		mutex_unlock(&priv->conf_mutex);
+		return;
+	}
+
+	/* Make sure we still have a pending probe req */
+	if (cw1200_queue_get_skb(queue,	priv->pending_frame_id,
+				 &frame.skb, &txpriv)) {
+		up(&priv->scan.lock);
+		mutex_unlock(&priv->conf_mutex);
+		wsm_unlock_tx(priv);
+		return;
+	}
+	wsm = (struct wsm_tx *)frame.skb->data;
+	scan.max_tx_rate = wsm->max_tx_rate;
+	scan.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
+		WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
+	if (priv->join_status == CW1200_JOIN_STATUS_STA ||
+	    priv->join_status == CW1200_JOIN_STATUS_IBSS) {
+		scan.type = WSM_SCAN_TYPE_BACKGROUND;
+		scan.flags = WSM_SCAN_FLAG_FORCE_BACKGROUND;
+	}
+	ch[0].number = priv->channel->hw_value;
+
+	skb_pull(frame.skb, txpriv->offset);
+
+	ies = &frame.skb->data[sizeof(struct ieee80211_hdr_3addr)];
+	ies_len = frame.skb->len - sizeof(struct ieee80211_hdr_3addr);
+
+	if (ies_len) {
+		u8 *ssidie =
+			(u8 *)cfg80211_find_ie(WLAN_EID_SSID, ies, ies_len);
+		if (ssidie && ssidie[1] && ssidie[1] <= sizeof(ssids[0].ssid)) {
+			u8 *nextie = &ssidie[2 + ssidie[1]];
+			/* Remove SSID from the IE list. It has to be provided
+			 * as a separate argument in cw1200_scan_start call
+			 */
+
+			/* Store SSID localy */
+			ssids[0].length = ssidie[1];
+			memcpy(ssids[0].ssid, &ssidie[2], ssids[0].length);
+			scan.num_ssids = 1;
+
+			/* Remove SSID from IE list */
+			ssidie[1] = 0;
+			memmove(&ssidie[2], nextie, &ies[ies_len] - nextie);
+			skb_trim(frame.skb, frame.skb->len - ssids[0].length);
+		}
+	}
+
+	/* FW bug: driver has to restart p2p-dev mode after scan */
+	if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
+		cw1200_disable_listening(priv);
+	ret = wsm_set_template_frame(priv, &frame);
+	priv->scan.direct_probe = 1;
+	if (!ret) {
+		wsm_flush_tx(priv);
+		ret = cw1200_scan_start(priv, &scan);
+	}
+	mutex_unlock(&priv->conf_mutex);
+
+	skb_push(frame.skb, txpriv->offset);
+	if (!ret)
+		IEEE80211_SKB_CB(frame.skb)->flags |= IEEE80211_TX_STAT_ACK;
+	BUG_ON(cw1200_queue_remove(queue, priv->pending_frame_id));
+
+	if (ret) {
+		priv->scan.direct_probe = 0;
+		up(&priv->scan.lock);
+		wsm_unlock_tx(priv);
+	}
+
+	return;
+}

drivers/net/wireless/cw1200/scan.h

+/*
+ * Scan interface for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef SCAN_H_INCLUDED
+#define SCAN_H_INCLUDED
+
+#include <linux/semaphore.h>
+#include "wsm.h"
+
+/* external */ struct sk_buff;
+/* external */ struct cfg80211_scan_request;
+/* external */ struct ieee80211_channel;
+/* external */ struct ieee80211_hw;
+/* external */ struct work_struct;
+
+struct cw1200_scan {
+	struct semaphore lock;
+	struct work_struct work;
+	struct delayed_work timeout;
+	struct cfg80211_scan_request *req;
+	struct ieee80211_channel **begin;
+	struct ieee80211_channel **curr;
+	struct ieee80211_channel **end;
+	struct wsm_ssid ssids[WSM_SCAN_MAX_NUM_OF_SSIDS];
+	int output_power;
+	int n_ssids;
+	int status;
+	atomic_t in_progress;
+	/* Direct probe requests workaround */
+	struct delayed_work probe_work;
+	int direct_probe;
+};
+
+int cw1200_hw_scan(struct ieee80211_hw *hw,
+		   struct ieee80211_vif *vif,
+		   struct cfg80211_scan_request *req);
+void cw1200_scan_work(struct work_struct *work);
+void cw1200_scan_timeout(struct work_struct *work);
+void cw1200_clear_recent_scan_work(struct work_struct *work);
+void cw1200_scan_complete_cb(struct cw1200_common *priv,
+			     struct wsm_scan_complete *arg);
+void cw1200_scan_failed_cb(struct cw1200_common *priv);
+
+/* ******************************************************************** */
+/* Raw probe requests TX workaround					*/
+void cw1200_probe_work(struct work_struct *work);
+
+#endif

drivers/net/wireless/cw1200/sta.c

+/*
+ * Mac80211 STA API for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+
+#include "cw1200.h"
+#include "sta.h"
+#include "fwio.h"
+#include "bh.h"
+#include "debug.h"
+
+#ifndef ERP_INFO_BYTE_OFFSET
+#define ERP_INFO_BYTE_OFFSET 2
+#endif
+
+static void cw1200_do_join(struct cw1200_common *priv);
+static void cw1200_do_unjoin(struct cw1200_common *priv);
+
+static int cw1200_upload_beacon(struct cw1200_common *priv);
+static int cw1200_upload_pspoll(struct cw1200_common *priv);
+static int cw1200_upload_null(struct cw1200_common *priv);
+static int cw1200_upload_qosnull(struct cw1200_common *priv);
+static int cw1200_start_ap(struct cw1200_common *priv);
+static int cw1200_update_beaconing(struct cw1200_common *priv);
+static int cw1200_enable_beaconing(struct cw1200_common *priv,
+				   bool enable);
+static void __cw1200_sta_notify(struct ieee80211_hw *dev,
+				struct ieee80211_vif *vif,
+				enum sta_notify_cmd notify_cmd,
+				int link_id);
+static int __cw1200_flush(struct cw1200_common *priv, bool drop);
+
+static inline void __cw1200_free_event_queue(struct list_head *list)
+{
+	struct cw1200_wsm_event *event, *tmp;
+	list_for_each_entry_safe(event, tmp, list, link) {
+		list_del(&event->link);
+		kfree(event);
+	}
+}
+
+/* ******************************************************************** */
+/* STA API								*/
+
+int cw1200_start(struct ieee80211_hw *dev)
+{
+	struct cw1200_common *priv = dev->priv;
+	int ret = 0;
+
+	cw1200_pm_stay_awake(&priv->pm_state, HZ);
+
+	mutex_lock(&priv->conf_mutex);
+
+	/* default EDCA */
+	WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
+	WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
+	WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
+	WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
+	ret = wsm_set_edca_params(priv, &priv->edca);
+	if (ret)
+		goto out;
+
+	ret = cw1200_set_uapsd_param(priv, &priv->edca);
+	if (ret)
+		goto out;
+
+	priv->setbssparams_done = false;
+
+	memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
+	priv->mode = NL80211_IFTYPE_MONITOR;
+	priv->wep_default_key_id = -1;
+
+	priv->cqm_beacon_loss_count = 10;
+
+	ret = cw1200_setup_mac(priv);
+	if (ret)
+		goto out;
+
+out:
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+void cw1200_stop(struct ieee80211_hw *dev)
+{
+	struct cw1200_common *priv = dev->priv;
+	LIST_HEAD(list);
+	int i;
+
+	wsm_lock_tx(priv);
+
+	while (down_trylock(&priv->scan.lock)) {
+		/* Scan is in progress. Force it to stop. */
+		priv->scan.req = NULL;
+		schedule();
+	}
+	up(&priv->scan.lock);
+
+	cancel_delayed_work_sync(&priv->scan.probe_work);
+	cancel_delayed_work_sync(&priv->scan.timeout);
+	cancel_delayed_work_sync(&priv->clear_recent_scan_work);
+	cancel_delayed_work_sync(&priv->join_timeout);
+	cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
+	cancel_work_sync(&priv->unjoin_work);
+	cancel_delayed_work_sync(&priv->link_id_gc_work);
+	flush_workqueue(priv->workqueue);
+	del_timer_sync(&priv->mcast_timeout);
+	mutex_lock(&priv->conf_mutex);
+	priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+	priv->listening = false;
+
+	spin_lock(&priv->event_queue_lock);
+	list_splice_init(&priv->event_queue, &list);
+	spin_unlock(&priv->event_queue_lock);
+	__cw1200_free_event_queue(&list);
+
+
+	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+	priv->join_pending = false;
+
+	for (i = 0; i < 4; i++)
+		cw1200_queue_clear(&priv->tx_queue[i]);
+	mutex_unlock(&priv->conf_mutex);
+	tx_policy_clean(priv);
+
+	/* HACK! */
+	if (atomic_xchg(&priv->tx_lock, 1) != 1)
+		pr_debug("[STA] TX is force-unlocked due to stop request.\n");
+
+	wsm_unlock_tx(priv);
+	atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
+}
+
+static int cw1200_bssloss_mitigation = 1;
+module_param(cw1200_bssloss_mitigation, int, 0644);
+MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
+
+
+void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
+			     int init, int good, int bad)
+{
+	int tx = 0;
+
+	priv->delayed_link_loss = 0;
+	cancel_work_sync(&priv->bss_params_work);
+
+	pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
+		 priv->bss_loss_state,
+		 init, good, bad,
+		 atomic_read(&priv->tx_lock),
+		 priv->delayed_unjoin);
+
+	/* If we have a pending unjoin */
+	if (priv->delayed_unjoin)
+		return;
+
+	if (init) {
+		queue_delayed_work(priv->workqueue,
+				   &priv->bss_loss_work,
+				   HZ);
+		priv->bss_loss_state = 0;
+
+		/* Skip the confimration procedure in P2P case */
+		if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
+			tx = 1;
+	} else if (good) {
+		cancel_delayed_work_sync(&priv->bss_loss_work);
+		priv->bss_loss_state = 0;
+		queue_work(priv->workqueue, &priv->bss_params_work);
+	} else if (bad) {
+		/* XXX Should we just keep going until we time out? */
+		if (priv->bss_loss_state < 3)
+			tx = 1;
+	} else {
+		cancel_delayed_work_sync(&priv->bss_loss_work);
+		priv->bss_loss_state = 0;
+	}
+
+	/* Bypass mitigation if it's disabled */
+	if (!cw1200_bssloss_mitigation)
+		tx = 0;
+
+	/* Spit out a NULL packet to our AP if necessary */
+	if (tx) {
+		struct sk_buff *skb;
+
+		priv->bss_loss_state++;
+
+		skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
+		WARN_ON(!skb);
+		if (skb)
+			cw1200_tx(priv->hw, NULL, skb);
+	}
+}
+
+int cw1200_add_interface(struct ieee80211_hw *dev,
+			 struct ieee80211_vif *vif)
+{
+	int ret;
+	struct cw1200_common *priv = dev->priv;
+	/* __le32 auto_calibration_mode = __cpu_to_le32(1); */
+
+	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
+			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
+
+	mutex_lock(&priv->conf_mutex);
+
+	if (priv->mode != NL80211_IFTYPE_MONITOR) {
+		mutex_unlock(&priv->conf_mutex);
+		return -EOPNOTSUPP;
+	}
+
+	switch (vif->type) {
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_AP:
+		priv->mode = vif->type;
+		break;
+	default:
+		mutex_unlock(&priv->conf_mutex);
+		return -EOPNOTSUPP;
+	}
+
+	priv->vif = vif;
+	memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
+	ret = cw1200_setup_mac(priv);
+	/* Enable auto-calibration */
+	/* Exception in subsequent channel switch; disabled.
+	 *  wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
+	 *      &auto_calibration_mode, sizeof(auto_calibration_mode));
+	*/
+
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+void cw1200_remove_interface(struct ieee80211_hw *dev,
+			     struct ieee80211_vif *vif)
+{
+	struct cw1200_common *priv = dev->priv;
+	struct wsm_reset reset = {
+		.reset_statistics = true,
+	};
+	int i;
+
+	mutex_lock(&priv->conf_mutex);
+	switch (priv->join_status) {
+	case CW1200_JOIN_STATUS_JOINING:
+	case CW1200_JOIN_STATUS_PRE_STA:
+	case CW1200_JOIN_STATUS_STA:
+	case CW1200_JOIN_STATUS_IBSS:
+		wsm_lock_tx(priv);
+		if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+			wsm_unlock_tx(priv);
+		break;
+	case CW1200_JOIN_STATUS_AP:
+		for (i = 0; priv->link_id_map; ++i) {
+			if (priv->link_id_map & BIT(i)) {
+				reset.link_id = i;
+				wsm_reset(priv, &reset);
+				priv->link_id_map &= ~BIT(i);
+			}
+		}
+		memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
+		priv->sta_asleep_mask = 0;
+		priv->enable_beacon = false;
+		priv->tx_multicast = false;
+		priv->aid0_bit_set = false;
+		priv->buffered_multicasts = false;
+		priv->pspoll_mask = 0;
+		reset.link_id = 0;
+		wsm_reset(priv, &reset);
+		break;
+	case CW1200_JOIN_STATUS_MONITOR:
+		cw1200_update_listening(priv, false);
+		break;
+	default:
+		break;
+	}
+	priv->vif = NULL;
+	priv->mode = NL80211_IFTYPE_MONITOR;
+	memset(priv->mac_addr, 0, ETH_ALEN);
+	memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
+	cw1200_free_keys(priv);
+	cw1200_setup_mac(priv);
+	priv->listening = false;
+	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+	if (!__cw1200_flush(priv, true))
+		wsm_unlock_tx(priv);
+
+	mutex_unlock(&priv->conf_mutex);
+}
+
+int cw1200_change_interface(struct ieee80211_hw *dev,
+			    struct ieee80211_vif *vif,
+			    enum nl80211_iftype new_type,
+			    bool p2p)
+{
+	int ret = 0;
+	pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
+		 p2p, vif->type, vif->p2p);
+
+	if (new_type != vif->type || vif->p2p != p2p) {
+		cw1200_remove_interface(dev, vif);
+		vif->type = new_type;
+		vif->p2p = p2p;
+		ret = cw1200_add_interface(dev, vif);
+	}
+
+	return ret;
+}
+
+int cw1200_config(struct ieee80211_hw *dev, u32 changed)
+{
+	int ret = 0;
+	struct cw1200_common *priv = dev->priv;
+	struct ieee80211_conf *conf = &dev->conf;
+
+	pr_debug("CONFIG CHANGED:  %08x\n", changed);
+
+	down(&priv->scan.lock);
+	mutex_lock(&priv->conf_mutex);
+	/* TODO: IEEE80211_CONF_CHANGE_QOS */
+	/* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
+
+	if (changed & IEEE80211_CONF_CHANGE_POWER) {
+		priv->output_power = conf->power_level;
+		pr_debug("[STA] TX power: %d\n", priv->output_power);
+		wsm_set_output_power(priv, priv->output_power * 10);
+	}
+
+	if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
+	    (priv->channel != conf->chandef.chan)) {
+		struct ieee80211_channel *ch = conf->chandef.chan;
+		struct wsm_switch_channel channel = {
+			.channel_number = ch->hw_value,
+		};
+		pr_debug("[STA] Freq %d (wsm ch: %d).\n",
+			 ch->center_freq, ch->hw_value);
+
+		/* __cw1200_flush() implicitly locks tx, if successful */
+		if (!__cw1200_flush(priv, false)) {
+			if (!wsm_switch_channel(priv, &channel)) {
+				ret = wait_event_timeout(priv->channel_switch_done,
+							 !priv->channel_switch_in_progress,
+							 3 * HZ);
+				if (ret) {
+					/* Already unlocks if successful */
+					priv->channel = ch;
+					ret = 0;
+				} else {
+					ret = -ETIMEDOUT;
+				}
+			} else {
+				/* Unlock if switch channel fails */
+				wsm_unlock_tx(priv);
+			}
+		}
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_PS) {
+		if (!(conf->flags & IEEE80211_CONF_PS))
+			priv->powersave_mode.mode = WSM_PSM_ACTIVE;
+		else if (conf->dynamic_ps_timeout <= 0)
+			priv->powersave_mode.mode = WSM_PSM_PS;
+		else
+			priv->powersave_mode.mode = WSM_PSM_FAST_PS;
+
+		/* Firmware requires that value for this 1-byte field must
+		 * be specified in units of 500us. Values above the 128ms
+		 * threshold are not supported.
+		 */
+		if (conf->dynamic_ps_timeout >= 0x80)
+			priv->powersave_mode.fast_psm_idle_period = 0xFF;
+		else
+			priv->powersave_mode.fast_psm_idle_period =
+					conf->dynamic_ps_timeout << 1;
+
+		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
+		    priv->bss_params.aid)
+			cw1200_set_pm(priv, &priv->powersave_mode);
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
+		/* TBD: It looks like it's transparent
+		 * there's a monitor interface present -- use this
+		 * to determine for example whether to calculate
+		 * timestamps for packets or not, do not use instead
+		 * of filter flags!
+		 */
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+		struct wsm_operational_mode mode = {
+			.power_mode = cw1200_power_mode,
+			.disable_more_flag_usage = true,
+		};
+
+		wsm_lock_tx(priv);
+		/* Disable p2p-dev mode forced by TX request */
+		if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
+		    (conf->flags & IEEE80211_CONF_IDLE) &&
+		    !priv->listening) {
+			cw1200_disable_listening(priv);
+			priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+		}
+		wsm_set_operational_mode(priv, &mode);
+		wsm_unlock_tx(priv);
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
+		pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
+			 conf->long_frame_max_tx_count,
+			 conf->short_frame_max_tx_count);
+		spin_lock_bh(&priv->tx_policy_cache.lock);
+		priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
+		priv->short_frame_max_tx_count =
+			(conf->short_frame_max_tx_count < 0x0F) ?
+			conf->short_frame_max_tx_count : 0x0F;
+		priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
+		spin_unlock_bh(&priv->tx_policy_cache.lock);
+	}
+	mutex_unlock(&priv->conf_mutex);
+	up(&priv->scan.lock);
+	return ret;
+}
+
+void cw1200_update_filtering(struct cw1200_common *priv)
+{
+	int ret;
+	bool bssid_filtering = !priv->rx_filter.bssid;
+	bool is_p2p = priv->vif && priv->vif->p2p;
+	bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
+
+	static struct wsm_beacon_filter_control bf_ctrl;
+	static struct wsm_mib_beacon_filter_table bf_tbl = {
+		.entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
+		.entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
+					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
+					WSM_BEACON_FILTER_IE_HAS_APPEARED,
+		.entry[0].oui[0] = 0x50,
+		.entry[0].oui[1] = 0x6F,
+		.entry[0].oui[2] = 0x9A,
+		.entry[1].ie_id = WLAN_EID_HT_OPERATION,
+		.entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
+					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
+					WSM_BEACON_FILTER_IE_HAS_APPEARED,
+		.entry[2].ie_id = WLAN_EID_ERP_INFO,
+		.entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
+					WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
+					WSM_BEACON_FILTER_IE_HAS_APPEARED,
+	};
+
+	if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
+		return;
+	else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
+		bssid_filtering = false;
+
+	if (priv->disable_beacon_filter) {
+		bf_ctrl.enabled = 0;
+		bf_ctrl.bcn_count = 1;
+		bf_tbl.num = __cpu_to_le32(0);
+	} else if (is_p2p || !is_sta) {
+		bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
+			WSM_BEACON_FILTER_AUTO_ERP;
+		bf_ctrl.bcn_count = 0;
+		bf_tbl.num = __cpu_to_le32(2);
+	} else {
+		bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
+		bf_ctrl.bcn_count = 0;
+		bf_tbl.num = __cpu_to_le32(3);
+	}
+
+	/*
+	* When acting as p2p client being connected to p2p GO, in order to
+	* receive frames from a different p2p device, turn off bssid filter.
+	*
+	* WARNING: FW dependency!
+	* This can only be used with FW WSM371 and its successors.
+	* In that FW version even with bssid filter turned off,
+	* device will block most of the unwanted frames.
+	*/
+	if (is_p2p)
+		bssid_filtering = false;
+
+	ret = wsm_set_rx_filter(priv, &priv->rx_filter);
+	if (!ret)
+		ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
+	if (!ret)
+		ret = wsm_beacon_filter_control(priv, &bf_ctrl);
+	if (!ret)
+		ret = wsm_set_bssid_filtering(priv, bssid_filtering);
+	if (!ret)
+		ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
+	if (ret)
+		wiphy_err(priv->hw->wiphy,
+			  "Update filtering failed: %d.\n", ret);
+	return;
+}
+
+void cw1200_update_filtering_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common,
+			     update_filtering_work);
+
+	cw1200_update_filtering(priv);
+}
+
+void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common,
+			     set_beacon_wakeup_period_work);
+
+	wsm_set_beacon_wakeup_period(priv,
+				     priv->beacon_int * priv->join_dtim_period >
+				     MAX_BEACON_SKIP_TIME_MS ? 1 :
+				     priv->join_dtim_period, 0);
+}
+
+u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
+			     struct netdev_hw_addr_list *mc_list)
+{
+	static u8 broadcast_ipv6[ETH_ALEN] = {
+		0x33, 0x33, 0x00, 0x00, 0x00, 0x01
+	};
+	static u8 broadcast_ipv4[ETH_ALEN] = {
+		0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
+	};
+	struct cw1200_common *priv = hw->priv;
+	struct netdev_hw_addr *ha;
+	int count = 0;
+
+	/* Disable multicast filtering */
+	priv->has_multicast_subscription = false;
+	memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
+
+	if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
+		return 0;
+
+	/* Enable if requested */
+	netdev_hw_addr_list_for_each(ha, mc_list) {
+		pr_debug("[STA] multicast: %pM\n", ha->addr);
+		memcpy(&priv->multicast_filter.macaddrs[count],
+		       ha->addr, ETH_ALEN);
+		if (memcmp(ha->addr, broadcast_ipv4, ETH_ALEN) &&
+		    memcmp(ha->addr, broadcast_ipv6, ETH_ALEN))
+			priv->has_multicast_subscription = true;
+		count++;
+	}
+
+	if (count) {
+		priv->multicast_filter.enable = __cpu_to_le32(1);
+		priv->multicast_filter.num_addrs = __cpu_to_le32(count);
+	}
+
+	return netdev_hw_addr_list_count(mc_list);
+}
+
+void cw1200_configure_filter(struct ieee80211_hw *dev,
+			     unsigned int changed_flags,
+			     unsigned int *total_flags,
+			     u64 multicast)
+{
+	struct cw1200_common *priv = dev->priv;
+	bool listening = !!(*total_flags &
+			    (FIF_PROMISC_IN_BSS |
+			     FIF_OTHER_BSS |
+			     FIF_BCN_PRBRESP_PROMISC |
+			     FIF_PROBE_REQ));
+
+	*total_flags &= FIF_PROMISC_IN_BSS |
+			FIF_OTHER_BSS |
+			FIF_FCSFAIL |
+			FIF_BCN_PRBRESP_PROMISC |
+			FIF_PROBE_REQ;
+
+	down(&priv->scan.lock);
+	mutex_lock(&priv->conf_mutex);
+
+	priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
+			? 1 : 0;
+	priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
+			FIF_PROBE_REQ)) ? 1 : 0;
+	priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
+	priv->disable_beacon_filter = !(*total_flags &
+					(FIF_BCN_PRBRESP_PROMISC |
+					 FIF_PROMISC_IN_BSS |
+					 FIF_PROBE_REQ));
+	if (priv->listening != listening) {
+		priv->listening = listening;
+		wsm_lock_tx(priv);
+		cw1200_update_listening(priv, listening);
+		wsm_unlock_tx(priv);
+	}
+	cw1200_update_filtering(priv);
+	mutex_unlock(&priv->conf_mutex);
+	up(&priv->scan.lock);
+}
+
+int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
+		   u16 queue, const struct ieee80211_tx_queue_params *params)
+{
+	struct cw1200_common *priv = dev->priv;
+	int ret = 0;
+	/* To prevent re-applying PM request OID again and again*/
+	bool old_uapsd_flags;
+
+	mutex_lock(&priv->conf_mutex);
+
+	if (queue < dev->queues) {
+		old_uapsd_flags = priv->uapsd_info.uapsd_flags;
+
+		WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
+		ret = wsm_set_tx_queue_params(priv,
+					      &priv->tx_queue_params.params[queue], queue);
+		if (ret) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		WSM_EDCA_SET(&priv->edca, queue, params->aifs,
+			     params->cw_min, params->cw_max,
+			     params->txop, 0xc8,
+			     params->uapsd);
+		ret = wsm_set_edca_params(priv, &priv->edca);
+		if (ret) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		if (priv->mode == NL80211_IFTYPE_STATION) {
+			ret = cw1200_set_uapsd_param(priv, &priv->edca);
+			if (!ret && priv->setbssparams_done &&
+			    (priv->join_status == CW1200_JOIN_STATUS_STA) &&
+			    (old_uapsd_flags != priv->uapsd_info.uapsd_flags))
+				ret = cw1200_set_pm(priv, &priv->powersave_mode);
+		}
+	} else {
+		ret = -EINVAL;
+	}
+
+out:
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+int cw1200_get_stats(struct ieee80211_hw *dev,
+		     struct ieee80211_low_level_stats *stats)
+{
+	struct cw1200_common *priv = dev->priv;
+
+	memcpy(stats, &priv->stats, sizeof(*stats));
+	return 0;
+}
+
+int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
+{
+	struct wsm_set_pm pm = *arg;
+
+	if (priv->uapsd_info.uapsd_flags != 0)
+		pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
+
+	if (memcmp(&pm, &priv->firmware_ps_mode,
+		   sizeof(struct wsm_set_pm))) {
+		priv->firmware_ps_mode = pm;
+		return wsm_set_pm(priv, &pm);
+	} else {
+		return 0;
+	}
+}
+
+int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
+		   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+		   struct ieee80211_key_conf *key)
+{
+	int ret = -EOPNOTSUPP;
+	struct cw1200_common *priv = dev->priv;
+	struct ieee80211_key_seq seq;
+
+	mutex_lock(&priv->conf_mutex);
+
+	if (cmd == SET_KEY) {
+		u8 *peer_addr = NULL;
+		int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
+			1 : 0;
+		int idx = cw1200_alloc_key(priv);
+		struct wsm_add_key *wsm_key = &priv->keys[idx];
+
+		if (idx < 0) {
+			ret = -EINVAL;
+			goto finally;
+		}
+
+		if (sta)
+			peer_addr = sta->addr;
+
+		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
+
+		switch (key->cipher) {
+		case WLAN_CIPHER_SUITE_WEP40:
+		case WLAN_CIPHER_SUITE_WEP104:
+			if (key->keylen > 16) {
+				cw1200_free_key(priv, idx);
+				ret = -EINVAL;
+				goto finally;
+			}
+
+			if (pairwise) {
+				wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
+				memcpy(wsm_key->wep_pairwise.peer,
+				       peer_addr, ETH_ALEN);
+				memcpy(wsm_key->wep_pairwise.keydata,
+				       &key->key[0], key->keylen);
+				wsm_key->wep_pairwise.keylen = key->keylen;
+			} else {
+				wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
+				memcpy(wsm_key->wep_group.keydata,
+				       &key->key[0], key->keylen);
+				wsm_key->wep_group.keylen = key->keylen;
+				wsm_key->wep_group.keyid = key->keyidx;
+			}
+			break;
+		case WLAN_CIPHER_SUITE_TKIP:
+			ieee80211_get_key_rx_seq(key, 0, &seq);
+			if (pairwise) {
+				wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
+				memcpy(wsm_key->tkip_pairwise.peer,
+				       peer_addr, ETH_ALEN);
+				memcpy(wsm_key->tkip_pairwise.keydata,
+				       &key->key[0], 16);
+				memcpy(wsm_key->tkip_pairwise.tx_mic_key,
+				       &key->key[16], 8);
+				memcpy(wsm_key->tkip_pairwise.rx_mic_key,
+				       &key->key[24], 8);
+			} else {
+				size_t mic_offset =
+					(priv->mode == NL80211_IFTYPE_AP) ?
+					16 : 24;
+				wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
+				memcpy(wsm_key->tkip_group.keydata,
+				       &key->key[0], 16);
+				memcpy(wsm_key->tkip_group.rx_mic_key,
+				       &key->key[mic_offset], 8);
+
+				wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
+				wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
+				wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
+				wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
+				wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
+				wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
+				wsm_key->tkip_group.rx_seqnum[6] = 0;
+				wsm_key->tkip_group.rx_seqnum[7] = 0;
+
+				wsm_key->tkip_group.keyid = key->keyidx;
+			}
+			break;
+		case WLAN_CIPHER_SUITE_CCMP:
+			ieee80211_get_key_rx_seq(key, 0, &seq);
+			if (pairwise) {
+				wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
+				memcpy(wsm_key->aes_pairwise.peer,
+				       peer_addr, ETH_ALEN);
+				memcpy(wsm_key->aes_pairwise.keydata,
+				       &key->key[0], 16);
+			} else {
+				wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
+				memcpy(wsm_key->aes_group.keydata,
+				       &key->key[0], 16);
+
+				wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
+				wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
+				wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
+				wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
+				wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
+				wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
+				wsm_key->aes_group.rx_seqnum[6] = 0;
+				wsm_key->aes_group.rx_seqnum[7] = 0;
+				wsm_key->aes_group.keyid = key->keyidx;
+			}
+			break;
+		case WLAN_CIPHER_SUITE_SMS4:
+			if (pairwise) {
+				wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
+				memcpy(wsm_key->wapi_pairwise.peer,
+				       peer_addr, ETH_ALEN);
+				memcpy(wsm_key->wapi_pairwise.keydata,
+				       &key->key[0], 16);
+				memcpy(wsm_key->wapi_pairwise.mic_key,
+				       &key->key[16], 16);
+				wsm_key->wapi_pairwise.keyid = key->keyidx;
+			} else {
+				wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
+				memcpy(wsm_key->wapi_group.keydata,
+				       &key->key[0],  16);
+				memcpy(wsm_key->wapi_group.mic_key,
+				       &key->key[16], 16);
+				wsm_key->wapi_group.keyid = key->keyidx;
+			}
+			break;
+		default:
+			pr_warn("Unhandled key type %d\n", key->cipher);
+			cw1200_free_key(priv, idx);
+			ret = -EOPNOTSUPP;
+			goto finally;
+		}
+		ret = wsm_add_key(priv, wsm_key);
+		if (!ret)
+			key->hw_key_idx = idx;
+		else
+			cw1200_free_key(priv, idx);
+	} else if (cmd == DISABLE_KEY) {
+		struct wsm_remove_key wsm_key = {
+			.index = key->hw_key_idx,
+		};
+
+		if (wsm_key.index > WSM_KEY_MAX_INDEX) {
+			ret = -EINVAL;
+			goto finally;
+		}
+
+		cw1200_free_key(priv, wsm_key.index);
+		ret = wsm_remove_key(priv, &wsm_key);
+	} else {
+		pr_warn("Unhandled key command %d\n", cmd);
+	}
+
+finally:
+	mutex_unlock(&priv->conf_mutex);
+	return ret;
+}
+
+void cw1200_wep_key_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, wep_key_work);
+	u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
+	struct cw1200_queue *queue = &priv->tx_queue[queue_id];
+	__le32 wep_default_key_id = __cpu_to_le32(
+		priv->wep_default_key_id);
+
+	pr_debug("[STA] Setting default WEP key: %d\n",
+		 priv->wep_default_key_id);
+	wsm_flush_tx(priv);
+	wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
+		      &wep_default_key_id, sizeof(wep_default_key_id));
+	cw1200_queue_requeue(queue, priv->pending_frame_id);
+	wsm_unlock_tx(priv);
+}
+
+int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	int ret = 0;
+	__le32 val32;
+	struct cw1200_common *priv = hw->priv;
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		return 0;
+
+	if (value != (u32) -1)
+		val32 = __cpu_to_le32(value);
+	else
+		val32 = 0; /* disabled */
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
+		/* device is down, can _not_ set threshold */
+		ret = -ENODEV;
+		goto out;
+	}
+
+	if (priv->rts_threshold == value)
+		goto out;
+
+	pr_debug("[STA] Setting RTS threshold: %d\n",
+		 priv->rts_threshold);
+
+	/* mutex_lock(&priv->conf_mutex); */
+	ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
+			    &val32, sizeof(val32));
+	if (!ret)
+		priv->rts_threshold = value;
+	/* mutex_unlock(&priv->conf_mutex); */
+
+out:
+	return ret;
+}
+
+/* If successful, LOCKS the TX queue! */
+static int __cw1200_flush(struct cw1200_common *priv, bool drop)
+{
+	int i, ret;
+
+	for (;;) {
+		/* TODO: correct flush handling is required when dev_stop.
+		 * Temporary workaround: 2s
+		 */
+		if (drop) {
+			for (i = 0; i < 4; ++i)
+				cw1200_queue_clear(&priv->tx_queue[i]);
+		} else {
+			ret = wait_event_timeout(
+				priv->tx_queue_stats.wait_link_id_empty,
+				cw1200_queue_stats_is_empty(
+					&priv->tx_queue_stats, -1),
+				2 * HZ);
+		}
+
+		if (!drop && ret <= 0) {
+			ret = -ETIMEDOUT;
+			break;
+		} else {
+			ret = 0;
+		}
+
+		wsm_lock_tx(priv);
+		if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
+			/* Highly unlikely: WSM requeued frames. */
+			wsm_unlock_tx(priv);
+			continue;
+		}
+		break;
+	}
+	return ret;
+}
+
+void cw1200_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
+{
+	struct cw1200_common *priv = hw->priv;
+
+	switch (priv->mode) {
+	case NL80211_IFTYPE_MONITOR:
+		drop = true;
+		break;
+	case NL80211_IFTYPE_AP:
+		if (!priv->enable_beacon)
+			drop = true;
+		break;
+	}
+
+	if (!__cw1200_flush(priv, drop))
+		wsm_unlock_tx(priv);
+
+	return;
+}
+
+/* ******************************************************************** */
+/* WSM callbacks							*/
+
+void cw1200_free_event_queue(struct cw1200_common *priv)
+{
+	LIST_HEAD(list);
+
+	spin_lock(&priv->event_queue_lock);
+	list_splice_init(&priv->event_queue, &list);
+	spin_unlock(&priv->event_queue_lock);
+
+	__cw1200_free_event_queue(&list);
+}
+
+void cw1200_event_handler(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, event_handler);
+	struct cw1200_wsm_event *event;
+	LIST_HEAD(list);
+
+	spin_lock(&priv->event_queue_lock);
+	list_splice_init(&priv->event_queue, &list);
+	spin_unlock(&priv->event_queue_lock);
+
+	list_for_each_entry(event, &list, link) {
+		switch (event->evt.id) {
+		case WSM_EVENT_ERROR:
+			pr_err("Unhandled WSM Error from LMAC\n");
+			break;
+		case WSM_EVENT_BSS_LOST:
+			pr_debug("[CQM] BSS lost.\n");
+			cancel_work_sync(&priv->unjoin_work);
+			if (!down_trylock(&priv->scan.lock)) {
+				cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
+				up(&priv->scan.lock);
+			} else {
+				/* Scan is in progress. Delay reporting.
+				 * Scan complete will trigger bss_loss_work
+				 */
+				priv->delayed_link_loss = 1;
+				/* Also start a watchdog. */
+				queue_delayed_work(priv->workqueue,
+						   &priv->bss_loss_work, 5*HZ);
+			}
+			break;
+		case WSM_EVENT_BSS_REGAINED:
+			pr_debug("[CQM] BSS regained.\n");
+			cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
+			cancel_work_sync(&priv->unjoin_work);
+			break;
+		case WSM_EVENT_RADAR_DETECTED:
+			wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
+			break;
+		case WSM_EVENT_RCPI_RSSI:
+		{
+			/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
+			 * RSSI = RCPI / 2 - 110
+			 */
+			int rcpiRssi = (int)(event->evt.data & 0xFF);
+			int cqm_evt;
+			if (priv->cqm_use_rssi)
+				rcpiRssi = (s8)rcpiRssi;
+			else
+				rcpiRssi =  rcpiRssi / 2 - 110;
+
+			cqm_evt = (rcpiRssi <= priv->cqm_rssi_thold) ?
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
+			pr_debug("[CQM] RSSI event: %d.\n", rcpiRssi);
+			ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
+						  GFP_KERNEL);
+			break;
+		}
+		case WSM_EVENT_BT_INACTIVE:
+			pr_warn("Unhandled BT INACTIVE from LMAC\n");
+			break;
+		case WSM_EVENT_BT_ACTIVE:
+			pr_warn("Unhandled BT ACTIVE from LMAC\n");
+			break;
+		}
+	}
+	__cw1200_free_event_queue(&list);
+}
+
+void cw1200_bss_loss_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, bss_loss_work.work);
+
+	pr_debug("[CQM] Reporting connection loss.\n");
+	wsm_lock_tx(priv);
+	if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+		wsm_unlock_tx(priv);
+}
+
+void cw1200_bss_params_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, bss_params_work);
+	mutex_lock(&priv->conf_mutex);
+
+	priv->bss_params.reset_beacon_loss = 1;
+	wsm_set_bss_params(priv, &priv->bss_params);
+	priv->bss_params.reset_beacon_loss = 0;
+
+	mutex_unlock(&priv->conf_mutex);
+}
+
+/* ******************************************************************** */
+/* Internal API								*/
+
+/*
+ * This function is called to Parse the SDD file
+ * to extract listen_interval and PTA related information
+ * sdd is a TLV: u8 id, u8 len, u8 data[]
+ */
+static int cw1200_parse_sdd_file(struct cw1200_common *priv)
+{
+	const u8 *p = priv->sdd->data;
+	int ret = 0;
+
+	while (p + 2 <= priv->sdd->data + priv->sdd->size) {
+		if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
+			pr_warn("Malformed sdd structure\n");
+			return -1;
+		}
+		switch (p[0]) {
+		case SDD_PTA_CFG_ELT_ID: {
+			u16 v;
+			if (p[1] < 4) {
+				pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
+				ret = -1;
+				break;
+			}
+			v = le16_to_cpu(*((u16 *)(p + 2)));
+			if (!v)  /* non-zero means this is enabled */
+				break;
+
+			v = le16_to_cpu(*((u16 *)(p + 4)));
+			priv->conf_listen_interval = (v >> 7) & 0x1F;
+			pr_debug("PTA found; Listen Interval %d\n",
+				 priv->conf_listen_interval);
+			break;
+		}
+		case SDD_REFERENCE_FREQUENCY_ELT_ID: {
+			u16 clk = le16_to_cpu(*((u16 *)(p + 2)));
+			if (clk != priv->hw_refclk)
+				pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
+					clk, priv->hw_refclk);
+			break;
+		}
+		default:
+			break;
+		}
+		p += p[1] + 2;
+	}
+
+	if (!priv->bt_present) {
+		pr_debug("PTA element NOT found.\n");
+		priv->conf_listen_interval = 0;
+	}
+	return ret;
+}
+
+int cw1200_setup_mac(struct cw1200_common *priv)
+{
+	int ret = 0;
+
+	/* NOTE: There is a bug in FW: it reports signal
+	 * as RSSI if RSSI subscription is enabled.
+	 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
+	 *
+	 * NOTE2: RSSI based reports have been switched to RCPI, since
+	 * FW has a bug and RSSI reported values are not stable,
+	 * what can leads to signal level oscilations in user-end applications
+	 */
+	struct wsm_rcpi_rssi_threshold threshold = {
+		.rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
+		WSM_RCPI_RSSI_DONT_USE_UPPER |
+		WSM_RCPI_RSSI_DONT_USE_LOWER,
+		.rollingAverageCount = 16,
+	};
+
+	struct wsm_configuration cfg = {
+		.dot11StationId = &priv->mac_addr[0],
+	};
+
+	/* Remember the decission here to make sure, we will handle
+	 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
+	 */
+	if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
+		priv->cqm_use_rssi = true;
+
+	if (!priv->sdd) {
+		ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
+		if (ret) {
+			pr_err("Can't load sdd file %s.\n", priv->sdd_path);
+			return ret;
+		}
+		cw1200_parse_sdd_file(priv);
+	}
+
+	cfg.dpdData = priv->sdd->data;
+	cfg.dpdData_size = priv->sdd->size;
+	ret = wsm_configuration(priv, &cfg);
+	if (ret)
+		return ret;
+
+	/* Configure RSSI/SCPI reporting as RSSI. */
+	wsm_set_rcpi_rssi_threshold(priv, &threshold);
+
+	return 0;
+}
+
+static void cw1200_join_complete(struct cw1200_common *priv)
+{
+	pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
+
+	priv->join_pending = false;
+	if (priv->join_complete_status) {
+		priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+		cw1200_update_listening(priv, priv->listening);
+		cw1200_do_unjoin(priv);
+		ieee80211_connection_loss(priv->vif);
+	} else {
+		if (priv->mode == NL80211_IFTYPE_ADHOC)
+			priv->join_status = CW1200_JOIN_STATUS_IBSS;
+		else
+			priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
+	}
+	wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
+}
+
+void cw1200_join_complete_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, join_complete_work);
+	mutex_lock(&priv->conf_mutex);
+	cw1200_join_complete(priv);
+	mutex_unlock(&priv->conf_mutex);
+}
+
+void cw1200_join_complete_cb(struct cw1200_common *priv,
+			     struct wsm_join_complete *arg)
+{
+	pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
+		 arg->status);
+
+	if (cancel_delayed_work(&priv->join_timeout)) {
+		priv->join_complete_status = arg->status;
+		queue_work(priv->workqueue, &priv->join_complete_work);
+	}
+}
+
+/* MUST be called with tx_lock held!  It will be unlocked for us. */
+static void cw1200_do_join(struct cw1200_common *priv)
+{
+	const u8 *bssid;
+	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
+	struct cfg80211_bss *bss = NULL;
+	struct wsm_protected_mgmt_policy mgmt_policy;
+	struct wsm_join join = {
+		.mode = conf->ibss_joined ?
+				WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
+		.preamble_type = WSM_JOIN_PREAMBLE_LONG,
+		.probe_for_join = 1,
+		.atim_window = 0,
+		.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
+							  conf->basic_rates),
+	};
+	if (delayed_work_pending(&priv->join_timeout)) {
+		pr_warn("[STA] - Join request already pending, skipping..\n");
+		wsm_unlock_tx(priv);
+		return;
+	}
+
+	if (priv->join_status)
+		cw1200_do_unjoin(priv);
+
+	bssid = priv->vif->bss_conf.bssid;
+
+	bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
+			bssid, NULL, 0, 0, 0);
+
+	if (!bss && !conf->ibss_joined) {
+		wsm_unlock_tx(priv);
+		return;
+	}
+
+	mutex_lock(&priv->conf_mutex);
+
+	/* Under the conf lock: check scan status and
+	 * bail out if it is in progress.
+	 */
+	if (atomic_read(&priv->scan.in_progress)) {
+		wsm_unlock_tx(priv);
+		goto done_put;
+	}
+
+	priv->join_pending = true;
+
+	/* Sanity check basic rates */
+	if (!join.basic_rate_set)
+		join.basic_rate_set = 7;
+
+	/* Sanity check beacon interval */
+	if (!priv->beacon_int)
+		priv->beacon_int = 1;
+
+	join.beacon_interval = priv->beacon_int;
+
+	/* BT Coex related changes */
+	if (priv->bt_present) {
+		if (((priv->conf_listen_interval * 100) %
+		     priv->beacon_int) == 0)
+			priv->listen_interval =
+				((priv->conf_listen_interval * 100) /
+				 priv->beacon_int);
+		else
+			priv->listen_interval =
+				((priv->conf_listen_interval * 100) /
+				 priv->beacon_int + 1);
+	}
+
+	if (priv->hw->conf.ps_dtim_period)
+		priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
+	join.dtim_period = priv->join_dtim_period;
+
+	join.channel_number = priv->channel->hw_value;
+	join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
+		WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
+
+	memcpy(join.bssid, bssid, sizeof(join.bssid));
+
+	pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
+		 join.bssid,
+		 join.dtim_period, priv->beacon_int);
+
+	if (!conf->ibss_joined) {
+		const u8 *ssidie;
+		rcu_read_lock();
+		ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
+		if (ssidie) {
+			join.ssid_len = ssidie[1];
+			memcpy(join.ssid, &ssidie[2], join.ssid_len);
+		}
+		rcu_read_unlock();
+	}
+
+	if (priv->vif->p2p) {
+		join.flags |= WSM_JOIN_FLAGS_P2P_GO;
+		join.basic_rate_set =
+			cw1200_rate_mask_to_wsm(priv, 0xFF0);
+	}
+
+	/* Enable asynchronous join calls */
+	if (!conf->ibss_joined) {
+		join.flags |= WSM_JOIN_FLAGS_FORCE;
+		join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
+	}
+
+	wsm_flush_tx(priv);
+
+	/* Stay Awake for Join and Auth Timeouts and a bit more */
+	cw1200_pm_stay_awake(&priv->pm_state,
+			     CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
+
+	cw1200_update_listening(priv, false);
+
+	/* Turn on Block ACKs */
+	wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
+				 priv->ba_rx_tid_mask);
+
+	/* Set up timeout */
+	if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
+		priv->join_status = CW1200_JOIN_STATUS_JOINING;
+		queue_delayed_work(priv->workqueue,
+				   &priv->join_timeout,
+				   CW1200_JOIN_TIMEOUT);
+	}
+
+	/* 802.11w protected mgmt frames */
+	mgmt_policy.protectedMgmtEnable = 0;
+	mgmt_policy.unprotectedMgmtFramesAllowed = 1;
+	mgmt_policy.encryptionForAuthFrame = 1;
+	wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
+
+	/* Perform actual join */
+	if (wsm_join(priv, &join)) {
+		pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
+		cancel_delayed_work_sync(&priv->join_timeout);
+		cw1200_update_listening(priv, priv->listening);
+		/* Tx lock still held, unjoin will clear it. */
+		if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+			wsm_unlock_tx(priv);
+	} else {
+		if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
+			cw1200_join_complete(priv); /* Will clear tx_lock */
+
+		/* Upload keys */
+		cw1200_upload_keys(priv);
+
+		/* Due to beacon filtering it is possible that the
+		 * AP's beacon is not known for the mac80211 stack.
+		 * Disable filtering temporary to make sure the stack
+		 * receives at least one
+		 */
+		priv->disable_beacon_filter = true;
+	}
+	cw1200_update_filtering(priv);
+
+done_put:
+	mutex_unlock(&priv->conf_mutex);
+	if (bss)
+		cfg80211_put_bss(priv->hw->wiphy, bss);
+}
+
+void cw1200_join_timeout(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, join_timeout.work);
+	pr_debug("[WSM] Join timed out.\n");
+	wsm_lock_tx(priv);
+	if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+		wsm_unlock_tx(priv);
+}
+
+static void cw1200_do_unjoin(struct cw1200_common *priv)
+{
+	struct wsm_reset reset = {
+		.reset_statistics = true,
+	};
+
+	cancel_delayed_work_sync(&priv->join_timeout);
+
+	mutex_lock(&priv->conf_mutex);
+	priv->join_pending = false;
+
+	if (atomic_read(&priv->scan.in_progress)) {
+		if (priv->delayed_unjoin)
+			wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
+		else
+			priv->delayed_unjoin = true;
+		goto done;
+	}
+
+	priv->delayed_link_loss = false;
+
+	if (!priv->join_status)
+		goto done;
+
+	if (priv->join_status > CW1200_JOIN_STATUS_IBSS) {
+		wiphy_err(priv->hw->wiphy, "Unexpected: join status: %d\n",
+			  priv->join_status);
+		BUG_ON(1);
+	}
+
+	cancel_work_sync(&priv->update_filtering_work);
+	cancel_work_sync(&priv->set_beacon_wakeup_period_work);
+	priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+
+	/* Unjoin is a reset. */
+	wsm_flush_tx(priv);
+	wsm_keep_alive_period(priv, 0);
+	wsm_reset(priv, &reset);
+	wsm_set_output_power(priv, priv->output_power * 10);
+	priv->join_dtim_period = 0;
+	cw1200_setup_mac(priv);
+	cw1200_free_event_queue(priv);
+	cancel_work_sync(&priv->event_handler);
+	cw1200_update_listening(priv, priv->listening);
+	cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
+
+	/* Disable Block ACKs */
+	wsm_set_block_ack_policy(priv, 0, 0);
+
+	priv->disable_beacon_filter = false;
+	cw1200_update_filtering(priv);
+	memset(&priv->association_mode, 0,
+	       sizeof(priv->association_mode));
+	memset(&priv->bss_params, 0, sizeof(priv->bss_params));
+	priv->setbssparams_done = false;
+	memset(&priv->firmware_ps_mode, 0,
+	       sizeof(priv->firmware_ps_mode));
+
+	pr_debug("[STA] Unjoin completed.\n");
+
+done:
+	mutex_unlock(&priv->conf_mutex);
+}
+
+void cw1200_unjoin_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, unjoin_work);
+
+	cw1200_do_unjoin(priv);
+
+	/* Tell the stack we're dead */
+	ieee80211_connection_loss(priv->vif);
+
+	wsm_unlock_tx(priv);
+}
+
+int cw1200_enable_listening(struct cw1200_common *priv)
+{
+	struct wsm_start start = {
+		.mode = WSM_START_MODE_P2P_DEV,
+		.band = WSM_PHY_BAND_2_4G,
+		.beacon_interval = 100,
+		.dtim_period = 1,
+		.probe_delay = 0,
+		.basic_rate_set = 0x0F,
+	};
+
+	if (priv->channel) {
+		start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
+			     WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
+		start.channel_number = priv->channel->hw_value;
+	} else {
+		start.band = WSM_PHY_BAND_2_4G;
+		start.channel_number = 1;
+	}
+
+	return wsm_start(priv, &start);
+}
+
+int cw1200_disable_listening(struct cw1200_common *priv)
+{
+	int ret;
+	struct wsm_reset reset = {
+		.reset_statistics = true,
+	};
+	ret = wsm_reset(priv, &reset);
+	return ret;
+}
+
+void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
+{
+	if (enabled) {
+		if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
+			if (!cw1200_enable_listening(priv))
+				priv->join_status = CW1200_JOIN_STATUS_MONITOR;
+			wsm_set_probe_responder(priv, true);
+		}
+	} else {
+		if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
+			if (!cw1200_disable_listening(priv))
+				priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+			wsm_set_probe_responder(priv, false);
+		}
+	}
+}
+
+int cw1200_set_uapsd_param(struct cw1200_common *priv,
+			   const struct wsm_edca_params *arg)
+{
+	int ret;
+	u16 uapsd_flags = 0;
+
+	/* Here's the mapping AC [queue, bit]
+	 *  VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
+	 */
+
+	if (arg->uapsd_enable[0])
+		uapsd_flags |= 1 << 3;
+
+	if (arg->uapsd_enable[1])
+		uapsd_flags |= 1 << 2;
+
+	if (arg->uapsd_enable[2])
+		uapsd_flags |= 1 << 1;
+
+	if (arg->uapsd_enable[3])
+		uapsd_flags |= 1;
+
+	/* Currently pseudo U-APSD operation is not supported, so setting
+	 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
+	 * AutoTriggerStep to 0
+	 */
+
+	priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
+	priv->uapsd_info.min_auto_trigger_interval = 0;
+	priv->uapsd_info.max_auto_trigger_interval = 0;
+	priv->uapsd_info.auto_trigger_step = 0;
+
+	ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
+	return ret;
+}
+
+/* ******************************************************************** */
+/* AP API								*/
+
+int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   struct ieee80211_sta *sta)
+{
+	struct cw1200_common *priv = hw->priv;
+	struct cw1200_sta_priv *sta_priv =
+			(struct cw1200_sta_priv *)&sta->drv_priv;
+	struct cw1200_link_entry *entry;
+	struct sk_buff *skb;
+
+	if (priv->mode != NL80211_IFTYPE_AP)
+		return 0;
+
+	sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
+	if (WARN_ON(!sta_priv->link_id)) {
+		wiphy_info(priv->hw->wiphy,
+			   "[AP] No more link IDs available.\n");
+		return -ENOENT;
+	}
+
+	entry = &priv->link_id_db[sta_priv->link_id - 1];
+	spin_lock_bh(&priv->ps_state_lock);
+	if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
+					IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
+		priv->sta_asleep_mask |= BIT(sta_priv->link_id);
+	entry->status = CW1200_LINK_HARD;
+	while ((skb = skb_dequeue(&entry->rx_queue)))
+		ieee80211_rx_irqsafe(priv->hw, skb);
+	spin_unlock_bh(&priv->ps_state_lock);
+	return 0;
+}
+
+int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		      struct ieee80211_sta *sta)
+{
+	struct cw1200_common *priv = hw->priv;
+	struct cw1200_sta_priv *sta_priv =
+			(struct cw1200_sta_priv *)&sta->drv_priv;
+	struct cw1200_link_entry *entry;
+
+	if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
+		return 0;
+
+	entry = &priv->link_id_db[sta_priv->link_id - 1];
+	spin_lock_bh(&priv->ps_state_lock);
+	entry->status = CW1200_LINK_RESERVE;
+	entry->timestamp = jiffies;
+	wsm_lock_tx_async(priv);
+	if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
+		wsm_unlock_tx(priv);
+	spin_unlock_bh(&priv->ps_state_lock);
+	flush_workqueue(priv->workqueue);
+	return 0;
+}
+
+static void __cw1200_sta_notify(struct ieee80211_hw *dev,
+				struct ieee80211_vif *vif,
+				enum sta_notify_cmd notify_cmd,
+				int link_id)
+{
+	struct cw1200_common *priv = dev->priv;
+	u32 bit, prev;
+
+	/* Zero link id means "for all link IDs" */
+	if (link_id)
+		bit = BIT(link_id);
+	else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
+		bit = 0;
+	else
+		bit = priv->link_id_map;
+	prev = priv->sta_asleep_mask & bit;
+
+	switch (notify_cmd) {
+	case STA_NOTIFY_SLEEP:
+		if (!prev) {
+			if (priv->buffered_multicasts &&
+			    !priv->sta_asleep_mask)
+				queue_work(priv->workqueue,
+					   &priv->multicast_start_work);
+			priv->sta_asleep_mask |= bit;
+		}
+		break;
+	case STA_NOTIFY_AWAKE:
+		if (prev) {
+			priv->sta_asleep_mask &= ~bit;
+			priv->pspoll_mask &= ~bit;
+			if (priv->tx_multicast && link_id &&
+			    !priv->sta_asleep_mask)
+				queue_work(priv->workqueue,
+					   &priv->multicast_stop_work);
+			cw1200_bh_wakeup(priv);
+		}
+		break;
+	}
+}
+
+void cw1200_sta_notify(struct ieee80211_hw *dev,
+		       struct ieee80211_vif *vif,
+		       enum sta_notify_cmd notify_cmd,
+		       struct ieee80211_sta *sta)
+{
+	struct cw1200_common *priv = dev->priv;
+	struct cw1200_sta_priv *sta_priv =
+		(struct cw1200_sta_priv *)&sta->drv_priv;
+
+	spin_lock_bh(&priv->ps_state_lock);
+	__cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
+	spin_unlock_bh(&priv->ps_state_lock);
+}
+
+static void cw1200_ps_notify(struct cw1200_common *priv,
+		      int link_id, bool ps)
+{
+	if (link_id > CW1200_MAX_STA_IN_AP_MODE)
+		return;
+
+	pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
+		 ps ? "Stop" : "Start",
+		 link_id, priv->sta_asleep_mask);
+
+	__cw1200_sta_notify(priv->hw, priv->vif,
+			    ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
+}
+
+static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
+{
+	struct sk_buff *skb;
+	struct wsm_update_ie update_ie = {
+		.what = WSM_UPDATE_IE_BEACON,
+		.count = 1,
+	};
+	u16 tim_offset, tim_length;
+
+	pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
+
+	skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
+			&tim_offset, &tim_length);
+	if (!skb) {
+		if (!__cw1200_flush(priv, true))
+			wsm_unlock_tx(priv);
+		return -ENOENT;
+	}
+
+	if (tim_offset && tim_length >= 6) {
+		/* Ignore DTIM count from mac80211:
+		 * firmware handles DTIM internally.
+		 */
+		skb->data[tim_offset + 2] = 0;
+
+		/* Set/reset aid0 bit */
+		if (aid0_bit_set)
+			skb->data[tim_offset + 4] |= 1;
+		else
+			skb->data[tim_offset + 4] &= ~1;
+	}
+
+	update_ie.ies = &skb->data[tim_offset];
+	update_ie.length = tim_length;
+	wsm_update_ie(priv, &update_ie);
+
+	dev_kfree_skb(skb);
+
+	return 0;
+}
+
+void cw1200_set_tim_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, set_tim_work);
+	(void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
+}
+
+int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
+		   bool set)
+{
+	struct cw1200_common *priv = dev->priv;
+	queue_work(priv->workqueue, &priv->set_tim_work);
+	return 0;
+}
+
+void cw1200_set_cts_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, set_cts_work);
+
+	u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
+	struct wsm_update_ie update_ie = {
+		.what = WSM_UPDATE_IE_BEACON,
+		.count = 1,
+		.ies = erp_ie,
+		.length = 3,
+	};
+	u32 erp_info;
+	__le32 use_cts_prot;
+	mutex_lock(&priv->conf_mutex);
+	erp_info = priv->erp_info;
+	mutex_unlock(&priv->conf_mutex);
+	use_cts_prot =
+		erp_info & WLAN_ERP_USE_PROTECTION ?
+		__cpu_to_le32(1) : 0;
+
+	erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
+
+	pr_debug("[STA] ERP information 0x%x\n", erp_info);
+
+	wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
+		      &use_cts_prot, sizeof(use_cts_prot));
+	wsm_update_ie(priv, &update_ie);
+
+	return;
+}
+
+static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
+{
+	struct wsm_override_internal_txrate arg;
+	int ret = 0;
+
+	if (priv->mode == NL80211_IFTYPE_STATION) {
+		/* Plumb PSPOLL and NULL template */
+		cw1200_upload_pspoll(priv);
+		cw1200_upload_null(priv);
+		cw1200_upload_qosnull(priv);
+	} else {
+		return 0;
+	}
+
+	memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
+
+	if (!priv->vif->p2p) {
+		/* STATION mode */
+		if (priv->bss_params.operational_rate_set & ~0xF) {
+			pr_debug("[STA] STA has ERP rates\n");
+			/* G or BG mode */
+			arg.internalTxRate = (__ffs(
+			priv->bss_params.operational_rate_set & ~0xF));
+		} else {
+			pr_debug("[STA] STA has non ERP rates\n");
+			/* B only mode */
+			arg.internalTxRate = (__ffs(priv->association_mode.basic_rate_set));
+		}
+		arg.nonErpInternalTxRate = (__ffs(priv->association_mode.basic_rate_set));
+	} else {
+		/* P2P mode */
+		arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
+		arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
+	}
+
+	pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
+		 priv->mode,
+		 arg.internalTxRate,
+		 arg.nonErpInternalTxRate);
+
+	ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
+			    &arg, sizeof(arg));
+
+	return ret;
+}
+
+void cw1200_bss_info_changed(struct ieee80211_hw *dev,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_bss_conf *info,
+			     u32 changed)
+{
+	struct cw1200_common *priv = dev->priv;
+	bool do_join = false;
+
+	mutex_lock(&priv->conf_mutex);
+
+	pr_debug("BSS CHANGED:  %08x\n", changed);
+
+	/* TODO: BSS_CHANGED_QOS */
+	/* TODO: BSS_CHANGED_TXPOWER */
+
+	if (changed & BSS_CHANGED_ARP_FILTER) {
+		struct wsm_mib_arp_ipv4_filter filter = {0};
+		int i;
+
+		pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
+			 info->arp_addr_cnt);
+
+		/* Currently only one IP address is supported by firmware.
+		 * In case of more IPs arp filtering will be disabled.
+		 */
+		if (info->arp_addr_cnt > 0 &&
+		    info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
+			for (i = 0; i < info->arp_addr_cnt; i++) {
+				filter.ipv4addrs[i] = info->arp_addr_list[i];
+				pr_debug("[STA] addr[%d]: 0x%X\n",
+					 i, filter.ipv4addrs[i]);
+			}
+			filter.enable = __cpu_to_le32(1);
+		}
+
+		pr_debug("[STA] arp ip filter enable: %d\n",
+			 __le32_to_cpu(filter.enable));
+
+		wsm_set_arp_ipv4_filter(priv, &filter);
+	}
+
+	if (changed &
+	    (BSS_CHANGED_BEACON |
+	     BSS_CHANGED_AP_PROBE_RESP |
+	     BSS_CHANGED_BSSID |
+	     BSS_CHANGED_SSID |
+	     BSS_CHANGED_IBSS)) {
+		pr_debug("BSS_CHANGED_BEACON\n");
+		priv->beacon_int = info->beacon_int;
+		cw1200_update_beaconing(priv);
+		cw1200_upload_beacon(priv);
+	}
+
+	if (changed & BSS_CHANGED_BEACON_ENABLED) {
+		pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
+
+		if (priv->enable_beacon != info->enable_beacon) {
+			cw1200_enable_beaconing(priv, info->enable_beacon);
+			priv->enable_beacon = info->enable_beacon;
+		}
+	}
+
+	if (changed & BSS_CHANGED_BEACON_INT) {
+		pr_debug("CHANGED_BEACON_INT\n");
+		if (info->ibss_joined)
+			do_join = true;
+		else if (priv->join_status == CW1200_JOIN_STATUS_AP)
+			cw1200_update_beaconing(priv);
+	}
+
+	/* assoc/disassoc, or maybe AID changed */
+	if (changed & BSS_CHANGED_ASSOC) {
+		wsm_lock_tx(priv);
+		priv->wep_default_key_id = -1;
+		wsm_unlock_tx(priv);
+	}
+
+	if (changed & BSS_CHANGED_BSSID) {
+		pr_debug("BSS_CHANGED_BSSID\n");
+		do_join = true;
+	}
+
+	if (changed &
+	    (BSS_CHANGED_ASSOC |
+	     BSS_CHANGED_BSSID |
+	     BSS_CHANGED_IBSS |
+	     BSS_CHANGED_BASIC_RATES |
+	     BSS_CHANGED_HT)) {
+		pr_debug("BSS_CHANGED_ASSOC\n");
+		if (info->assoc) {
+			if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
+				ieee80211_connection_loss(vif);
+				mutex_unlock(&priv->conf_mutex);
+				return;
+			} else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
+				priv->join_status = CW1200_JOIN_STATUS_STA;
+			}
+		} else {
+			do_join = true;
+		}
+
+		if (info->assoc || info->ibss_joined) {
+			struct ieee80211_sta *sta = NULL;
+			u32 val = 0;
+
+			if (info->dtim_period)
+				priv->join_dtim_period = info->dtim_period;
+			priv->beacon_int = info->beacon_int;
+
+			rcu_read_lock();
+
+			if (info->bssid && !info->ibss_joined)
+				sta = ieee80211_find_sta(vif, info->bssid);
+			if (sta) {
+				priv->ht_info.ht_cap = sta->ht_cap;
+				priv->bss_params.operational_rate_set =
+					cw1200_rate_mask_to_wsm(priv,
+								sta->supp_rates[priv->channel->band]);
+				priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
+				priv->ht_info.operation_mode = info->ht_operation_mode;
+			} else {
+				memset(&priv->ht_info, 0,
+				       sizeof(priv->ht_info));
+				priv->bss_params.operational_rate_set = -1;
+			}
+			rcu_read_unlock();
+
+			/* Non Greenfield stations present */
+			if (priv->ht_info.operation_mode &
+			    IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
+				val |= WSM_NON_GREENFIELD_STA_PRESENT;
+
+			/* Set HT protection method */
+			val |= (priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2;
+
+			/* TODO:
+			 * STBC_param.dual_cts
+			 *  STBC_param.LSIG_TXOP_FILL
+			 */
+
+			val = cpu_to_le32(val);
+			wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
+				      &val, sizeof(val));
+
+			priv->association_mode.greenfield =
+				cw1200_ht_greenfield(&priv->ht_info);
+			priv->association_mode.flags =
+				WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
+				WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
+				WSM_ASSOCIATION_MODE_USE_HT_MODE |
+				WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
+				WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
+			priv->association_mode.preamble =
+				info->use_short_preamble ?
+				WSM_JOIN_PREAMBLE_SHORT :
+				WSM_JOIN_PREAMBLE_LONG;
+			priv->association_mode.basic_rate_set = __cpu_to_le32(
+				cw1200_rate_mask_to_wsm(priv,
+							info->basic_rates));
+			priv->association_mode.mpdu_start_spacing =
+				cw1200_ht_ampdu_density(&priv->ht_info);
+
+			cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
+			cancel_work_sync(&priv->unjoin_work);
+
+			priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
+			priv->bss_params.aid = info->aid;
+
+			if (priv->join_dtim_period < 1)
+				priv->join_dtim_period = 1;
+
+			pr_debug("[STA] DTIM %d, interval: %d\n",
+				 priv->join_dtim_period, priv->beacon_int);
+			pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
+				 priv->association_mode.preamble,
+				 priv->association_mode.greenfield,
+				 priv->bss_params.aid,
+				 priv->bss_params.operational_rate_set,
+				 priv->association_mode.basic_rate_set);
+			wsm_set_association_mode(priv, &priv->association_mode);
+
+			if (!info->ibss_joined) {
+				wsm_keep_alive_period(priv, 30 /* sec */);
+				wsm_set_bss_params(priv, &priv->bss_params);
+				priv->setbssparams_done = true;
+				cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
+				cw1200_set_pm(priv, &priv->powersave_mode);
+			}
+			if (priv->vif->p2p) {
+				pr_debug("[STA] Setting p2p powersave configuration.\n");
+				wsm_set_p2p_ps_modeinfo(priv,
+							&priv->p2p_ps_modeinfo);
+			}
+			if (priv->bt_present)
+				cw1200_set_btcoexinfo(priv);
+		} else {
+			memset(&priv->association_mode, 0,
+			       sizeof(priv->association_mode));
+			memset(&priv->bss_params, 0, sizeof(priv->bss_params));
+		}
+	}
+
+	/* ERP Protection */
+	if (changed & (BSS_CHANGED_ASSOC |
+		       BSS_CHANGED_ERP_CTS_PROT |
+		       BSS_CHANGED_ERP_PREAMBLE)) {
+		u32 prev_erp_info = priv->erp_info;
+		if (info->use_cts_prot)
+			priv->erp_info |= WLAN_ERP_USE_PROTECTION;
+		else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
+			priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
+
+		if (info->use_short_preamble)
+			priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
+		else
+			priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
+
+		pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
+
+		if (prev_erp_info != priv->erp_info)
+			queue_work(priv->workqueue, &priv->set_cts_work);
+	}
+
+	/* ERP Slottime */
+	if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
+		__le32 slot_time = info->use_short_slot ?
+			__cpu_to_le32(9) : __cpu_to_le32(20);
+		pr_debug("[STA] Slot time: %d us.\n",
+			 __le32_to_cpu(slot_time));
+		wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
+			      &slot_time, sizeof(slot_time));
+	}
+
+	if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
+		struct wsm_rcpi_rssi_threshold threshold = {
+			.rollingAverageCount = 8,
+		};
+		pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
+			 info->cqm_rssi_thold, info->cqm_rssi_hyst);
+		priv->cqm_rssi_thold = info->cqm_rssi_thold;
+		priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
+
+		if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
+			/* RSSI subscription enabled */
+			/* TODO: It's not a correct way of setting threshold.
+			 * Upper and lower must be set equal here and adjusted
+			 * in callback. However current implementation is much
+			 * more relaible and stable.
+			 */
+
+			/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
+			 * RSSI = RCPI / 2 - 110
+			 */
+			if (priv->cqm_use_rssi) {
+				threshold.upperThreshold =
+					info->cqm_rssi_thold + info->cqm_rssi_hyst;
+				threshold.lowerThreshold =
+					info->cqm_rssi_thold;
+				threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
+			} else {
+				threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
+				threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
+			}
+			threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
+		} else {
+			/* There is a bug in FW, see sta.c. We have to enable
+			 * dummy subscription to get correct RSSI values.
+			 */
+			threshold.rssiRcpiMode |=
+				WSM_RCPI_RSSI_THRESHOLD_ENABLE |
+				WSM_RCPI_RSSI_DONT_USE_UPPER |
+				WSM_RCPI_RSSI_DONT_USE_LOWER;
+			if (priv->cqm_use_rssi)
+				threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
+		}
+		wsm_set_rcpi_rssi_threshold(priv, &threshold);
+	}
+	mutex_unlock(&priv->conf_mutex);
+
+	if (do_join) {
+		wsm_lock_tx(priv);
+		cw1200_do_join(priv); /* Will unlock it for us */
+	}
+}
+
+void cw1200_multicast_start_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, multicast_start_work);
+	long tmo = priv->join_dtim_period *
+			(priv->beacon_int + 20) * HZ / 1024;
+
+	cancel_work_sync(&priv->multicast_stop_work);
+
+	if (!priv->aid0_bit_set) {
+		wsm_lock_tx(priv);
+		cw1200_set_tim_impl(priv, true);
+		priv->aid0_bit_set = true;
+		mod_timer(&priv->mcast_timeout, jiffies + tmo);
+		wsm_unlock_tx(priv);
+	}
+}
+
+void cw1200_multicast_stop_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, multicast_stop_work);
+
+	if (priv->aid0_bit_set) {
+		del_timer_sync(&priv->mcast_timeout);
+		wsm_lock_tx(priv);
+		priv->aid0_bit_set = false;
+		cw1200_set_tim_impl(priv, false);
+		wsm_unlock_tx(priv);
+	}
+}
+
+void cw1200_mcast_timeout(unsigned long arg)
+{
+	struct cw1200_common *priv =
+		(struct cw1200_common *)arg;
+
+	wiphy_warn(priv->hw->wiphy,
+		   "Multicast delivery timeout.\n");
+	spin_lock_bh(&priv->ps_state_lock);
+	priv->tx_multicast = priv->aid0_bit_set &&
+			priv->buffered_multicasts;
+	if (priv->tx_multicast)
+		cw1200_bh_wakeup(priv);
+	spin_unlock_bh(&priv->ps_state_lock);
+}
+
+int cw1200_ampdu_action(struct ieee80211_hw *hw,
+			struct ieee80211_vif *vif,
+			enum ieee80211_ampdu_mlme_action action,
+			struct ieee80211_sta *sta, u16 tid, u16 *ssn,
+			u8 buf_size)
+{
+	/* Aggregation is implemented fully in firmware,
+	 * including block ack negotiation. Do not allow
+	 * mac80211 stack to do anything: it interferes with
+	 * the firmware.
+	 */
+
+	/* Note that we still need this function stubbed. */
+	return -ENOTSUPP;
+}
+
+/* ******************************************************************** */
+/* WSM callback								*/
+void cw1200_suspend_resume(struct cw1200_common *priv,
+			  struct wsm_suspend_resume *arg)
+{
+	pr_debug("[AP] %s: %s\n",
+		 arg->stop ? "stop" : "start",
+		 arg->multicast ? "broadcast" : "unicast");
+
+	if (arg->multicast) {
+		bool cancel_tmo = false;
+		spin_lock_bh(&priv->ps_state_lock);
+		if (arg->stop) {
+			priv->tx_multicast = false;
+		} else {
+			/* Firmware sends this indication every DTIM if there
+			 * is a STA in powersave connected. There is no reason
+			 * to suspend, following wakeup will consume much more
+			 * power than it could be saved.
+			 */
+			cw1200_pm_stay_awake(&priv->pm_state,
+					     priv->join_dtim_period *
+					     (priv->beacon_int + 20) * HZ / 1024);
+			priv->tx_multicast = (priv->aid0_bit_set &&
+					      priv->buffered_multicasts);
+			if (priv->tx_multicast) {
+				cancel_tmo = true;
+				cw1200_bh_wakeup(priv);
+			}
+		}
+		spin_unlock_bh(&priv->ps_state_lock);
+		if (cancel_tmo)
+			del_timer_sync(&priv->mcast_timeout);
+	} else {
+		spin_lock_bh(&priv->ps_state_lock);
+		cw1200_ps_notify(priv, arg->link_id, arg->stop);
+		spin_unlock_bh(&priv->ps_state_lock);
+		if (!arg->stop)
+			cw1200_bh_wakeup(priv);
+	}
+	return;
+}
+
+/* ******************************************************************** */
+/* AP privates								*/
+
+static int cw1200_upload_beacon(struct cw1200_common *priv)
+{
+	int ret = 0;
+	struct ieee80211_mgmt *mgmt;
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_BEACON,
+	};
+
+	u16 tim_offset;
+	u16 tim_len;
+
+	if (priv->mode == NL80211_IFTYPE_STATION ||
+	    priv->mode == NL80211_IFTYPE_MONITOR ||
+	    priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		goto done;
+
+	if (priv->vif->p2p)
+		frame.rate = WSM_TRANSMIT_RATE_6;
+
+	frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
+					     &tim_offset, &tim_len);
+	if (!frame.skb)
+		return -ENOMEM;
+
+	ret = wsm_set_template_frame(priv, &frame);
+
+	if (ret)
+		goto done;
+
+	/* TODO: Distill probe resp; remove TIM
+	 * and any other beacon-specific IEs
+	 */
+	mgmt = (void *)frame.skb->data;
+	mgmt->frame_control =
+		__cpu_to_le16(IEEE80211_FTYPE_MGMT |
+			      IEEE80211_STYPE_PROBE_RESP);
+
+	frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
+	if (priv->vif->p2p) {
+		ret = wsm_set_probe_responder(priv, true);
+	} else {
+		ret = wsm_set_template_frame(priv, &frame);
+		wsm_set_probe_responder(priv, false);
+	}
+
+done:
+	dev_kfree_skb(frame.skb);
+
+	return ret;
+}
+
+static int cw1200_upload_pspoll(struct cw1200_common *priv)
+{
+	int ret = 0;
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_PS_POLL,
+		.rate = 0xFF,
+	};
+
+
+	frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
+	if (!frame.skb)
+		return -ENOMEM;
+
+	ret = wsm_set_template_frame(priv, &frame);
+
+	dev_kfree_skb(frame.skb);
+
+	return ret;
+}
+
+static int cw1200_upload_null(struct cw1200_common *priv)
+{
+	int ret = 0;
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_NULL,
+		.rate = 0xFF,
+	};
+
+	frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
+	if (!frame.skb)
+		return -ENOMEM;
+
+	ret = wsm_set_template_frame(priv, &frame);
+
+	dev_kfree_skb(frame.skb);
+
+	return ret;
+}
+
+static int cw1200_upload_qosnull(struct cw1200_common *priv)
+{
+	int ret = 0;
+	/* TODO:  This needs to be implemented
+
+	struct wsm_template_frame frame = {
+		.frame_type = WSM_FRAME_TYPE_QOS_NULL,
+		.rate = 0xFF,
+	};
+
+	frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
+	if (!frame.skb)
+		return -ENOMEM;
+
+	ret = wsm_set_template_frame(priv, &frame);
+
+	dev_kfree_skb(frame.skb);
+
+	*/
+	return ret;
+}
+
+static int cw1200_enable_beaconing(struct cw1200_common *priv,
+				   bool enable)
+{
+	struct wsm_beacon_transmit transmit = {
+		.enable_beaconing = enable,
+	};
+
+	return wsm_beacon_transmit(priv, &transmit);
+}
+
+static int cw1200_start_ap(struct cw1200_common *priv)
+{
+	int ret;
+	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
+	struct wsm_start start = {
+		.mode = priv->vif->p2p ?
+				WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
+		.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
+				WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
+		.channel_number = priv->channel->hw_value,
+		.beacon_interval = conf->beacon_int,
+		.dtim_period = conf->dtim_period,
+		.preamble = conf->use_short_preamble ?
+				WSM_JOIN_PREAMBLE_SHORT :
+				WSM_JOIN_PREAMBLE_LONG,
+		.probe_delay = 100,
+		.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
+				conf->basic_rates),
+	};
+	struct wsm_operational_mode mode = {
+		.power_mode = cw1200_power_mode,
+		.disable_more_flag_usage = true,
+	};
+
+	memset(start.ssid, 0, sizeof(start.ssid));
+	if (!conf->hidden_ssid) {
+		start.ssid_len = conf->ssid_len;
+		memcpy(start.ssid, conf->ssid, start.ssid_len);
+	}
+
+	priv->beacon_int = conf->beacon_int;
+	priv->join_dtim_period = conf->dtim_period;
+
+	memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
+
+	pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
+		 start.channel_number, start.band,
+		 start.beacon_interval, start.dtim_period,
+		 start.basic_rate_set,
+		 start.ssid_len, start.ssid);
+	ret = wsm_start(priv, &start);
+	if (!ret)
+		ret = cw1200_upload_keys(priv);
+	if (!ret && priv->vif->p2p) {
+		pr_debug("[AP] Setting p2p powersave configuration.\n");
+		wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
+	}
+	if (!ret) {
+		wsm_set_block_ack_policy(priv, 0, 0);
+		priv->join_status = CW1200_JOIN_STATUS_AP;
+		cw1200_update_filtering(priv);
+	}
+	wsm_set_operational_mode(priv, &mode);
+	return ret;
+}
+
+static int cw1200_update_beaconing(struct cw1200_common *priv)
+{
+	struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
+	struct wsm_reset reset = {
+		.link_id = 0,
+		.reset_statistics = true,
+	};
+
+	if (priv->mode == NL80211_IFTYPE_AP) {
+		/* TODO: check if changed channel, band */
+		if (priv->join_status != CW1200_JOIN_STATUS_AP ||
+		    priv->beacon_int != conf->beacon_int) {
+			pr_debug("ap restarting\n");
+			wsm_lock_tx(priv);
+			if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
+				wsm_reset(priv, &reset);
+			priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
+			cw1200_start_ap(priv);
+			wsm_unlock_tx(priv);
+		} else
+			pr_debug("ap started join_status: %d\n",
+				 priv->join_status);
+	}
+	return 0;
+}

drivers/net/wireless/cw1200/sta.h

+/*
+ * Mac80211 STA interface for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef STA_H_INCLUDED
+#define STA_H_INCLUDED
+
+/* ******************************************************************** */
+/* mac80211 API								*/
+
+int cw1200_start(struct ieee80211_hw *dev);
+void cw1200_stop(struct ieee80211_hw *dev);
+int cw1200_add_interface(struct ieee80211_hw *dev,
+			 struct ieee80211_vif *vif);
+void cw1200_remove_interface(struct ieee80211_hw *dev,
+			     struct ieee80211_vif *vif);
+int cw1200_change_interface(struct ieee80211_hw *dev,
+			    struct ieee80211_vif *vif,
+			    enum nl80211_iftype new_type,
+			    bool p2p);
+int cw1200_config(struct ieee80211_hw *dev, u32 changed);
+void cw1200_configure_filter(struct ieee80211_hw *dev,
+			     unsigned int changed_flags,
+			     unsigned int *total_flags,
+			     u64 multicast);
+int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
+		   u16 queue, const struct ieee80211_tx_queue_params *params);
+int cw1200_get_stats(struct ieee80211_hw *dev,
+		     struct ieee80211_low_level_stats *stats);
+int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
+		   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+		   struct ieee80211_key_conf *key);
+
+int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value);
+
+void cw1200_flush(struct ieee80211_hw *hw, u32 queues, bool drop);
+
+u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
+			     struct netdev_hw_addr_list *mc_list);
+
+int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg);
+
+/* ******************************************************************** */
+/* WSM callbacks							*/
+
+void cw1200_join_complete_cb(struct cw1200_common *priv,
+				struct wsm_join_complete *arg);
+
+/* ******************************************************************** */
+/* WSM events								*/
+
+void cw1200_free_event_queue(struct cw1200_common *priv);
+void cw1200_event_handler(struct work_struct *work);
+void cw1200_bss_loss_work(struct work_struct *work);
+void cw1200_bss_params_work(struct work_struct *work);
+void cw1200_keep_alive_work(struct work_struct *work);
+void cw1200_tx_failure_work(struct work_struct *work);
+
+void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv, int init, int good,
+			     int bad);
+static inline void cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
+					 int init, int good, int bad)
+{
+	spin_lock(&priv->bss_loss_lock);
+	__cw1200_cqm_bssloss_sm(priv, init, good, bad);
+	spin_unlock(&priv->bss_loss_lock);
+}
+
+/* ******************************************************************** */
+/* Internal API								*/
+
+int cw1200_setup_mac(struct cw1200_common *priv);
+void cw1200_join_timeout(struct work_struct *work);
+void cw1200_unjoin_work(struct work_struct *work);
+void cw1200_join_complete_work(struct work_struct *work);
+void cw1200_wep_key_work(struct work_struct *work);
+void cw1200_update_listening(struct cw1200_common *priv, bool enabled);
+void cw1200_update_filtering(struct cw1200_common *priv);
+void cw1200_update_filtering_work(struct work_struct *work);
+void cw1200_set_beacon_wakeup_period_work(struct work_struct *work);
+int cw1200_enable_listening(struct cw1200_common *priv);
+int cw1200_disable_listening(struct cw1200_common *priv);
+int cw1200_set_uapsd_param(struct cw1200_common *priv,
+				const struct wsm_edca_params *arg);
+void cw1200_ba_work(struct work_struct *work);
+void cw1200_ba_timer(unsigned long arg);
+
+/* AP stuffs */
+int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
+		   bool set);
+int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   struct ieee80211_sta *sta);
+int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		      struct ieee80211_sta *sta);
+void cw1200_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
+		       enum sta_notify_cmd notify_cmd,
+		       struct ieee80211_sta *sta);
+void cw1200_bss_info_changed(struct ieee80211_hw *dev,
+			     struct ieee80211_vif *vif,
+			     struct ieee80211_bss_conf *info,
+			     u32 changed);
+int cw1200_ampdu_action(struct ieee80211_hw *hw,
+			struct ieee80211_vif *vif,
+			enum ieee80211_ampdu_mlme_action action,
+			struct ieee80211_sta *sta, u16 tid, u16 *ssn,
+			u8 buf_size);
+
+void cw1200_suspend_resume(struct cw1200_common *priv,
+			  struct wsm_suspend_resume *arg);
+void cw1200_set_tim_work(struct work_struct *work);
+void cw1200_set_cts_work(struct work_struct *work);
+void cw1200_multicast_start_work(struct work_struct *work);
+void cw1200_multicast_stop_work(struct work_struct *work);
+void cw1200_mcast_timeout(unsigned long arg);
+
+#endif

drivers/net/wireless/cw1200/txrx.c

+/*
+ * Datapath implementation for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/mac80211.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include "cw1200.h"
+#include "wsm.h"
+#include "bh.h"
+#include "sta.h"
+#include "debug.h"
+
+#define CW1200_INVALID_RATE_ID (0xFF)
+
+static int cw1200_handle_action_rx(struct cw1200_common *priv,
+				   struct sk_buff *skb);
+static const struct ieee80211_rate *
+cw1200_get_tx_rate(const struct cw1200_common *priv,
+		   const struct ieee80211_tx_rate *rate);
+
+/* ******************************************************************** */
+/* TX queue lock / unlock						*/
+
+static inline void cw1200_tx_queues_lock(struct cw1200_common *priv)
+{
+	int i;
+	for (i = 0; i < 4; ++i)
+		cw1200_queue_lock(&priv->tx_queue[i]);
+}
+
+static inline void cw1200_tx_queues_unlock(struct cw1200_common *priv)
+{
+	int i;
+	for (i = 0; i < 4; ++i)
+		cw1200_queue_unlock(&priv->tx_queue[i]);
+}
+
+/* ******************************************************************** */
+/* TX policy cache implementation					*/
+
+static void tx_policy_dump(struct tx_policy *policy)
+{
+	pr_debug("[TX policy] %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X: %d\n",
+		 policy->raw[0] & 0x0F,  policy->raw[0] >> 4,
+		 policy->raw[1] & 0x0F,  policy->raw[1] >> 4,
+		 policy->raw[2] & 0x0F,  policy->raw[2] >> 4,
+		 policy->raw[3] & 0x0F,  policy->raw[3] >> 4,
+		 policy->raw[4] & 0x0F,  policy->raw[4] >> 4,
+		 policy->raw[5] & 0x0F,  policy->raw[5] >> 4,
+		 policy->raw[6] & 0x0F,  policy->raw[6] >> 4,
+		 policy->raw[7] & 0x0F,  policy->raw[7] >> 4,
+		 policy->raw[8] & 0x0F,  policy->raw[8] >> 4,
+		 policy->raw[9] & 0x0F,  policy->raw[9] >> 4,
+		 policy->raw[10] & 0x0F,  policy->raw[10] >> 4,
+		 policy->raw[11] & 0x0F,  policy->raw[11] >> 4,
+		 policy->defined);
+}
+
+static void tx_policy_build(const struct cw1200_common *priv,
+	/* [out] */ struct tx_policy *policy,
+	struct ieee80211_tx_rate *rates, size_t count)
+{
+	int i, j;
+	unsigned limit = priv->short_frame_max_tx_count;
+	unsigned total = 0;
+	BUG_ON(rates[0].idx < 0);
+	memset(policy, 0, sizeof(*policy));
+
+	/* minstrel is buggy a little bit, so distille
+	 * incoming rates first. */
+
+	/* Sort rates in descending order. */
+	for (i = 1; i < count; ++i) {
+		if (rates[i].idx < 0) {
+			count = i;
+			break;
+		}
+		if (rates[i].idx > rates[i - 1].idx) {
+			struct ieee80211_tx_rate tmp = rates[i - 1];
+			rates[i - 1] = rates[i];
+			rates[i] = tmp;
+		}
+	}
+
+	/* Eliminate duplicates. */
+	total = rates[0].count;
+	for (i = 0, j = 1; j < count; ++j) {
+		if (rates[j].idx == rates[i].idx) {
+			rates[i].count += rates[j].count;
+		} else if (rates[j].idx > rates[i].idx) {
+			break;
+		} else {
+			++i;
+			if (i != j)
+				rates[i] = rates[j];
+		}
+		total += rates[j].count;
+	}
+	count = i + 1;
+
+	/* Re-fill policy trying to keep every requested rate and with
+	 * respect to the global max tx retransmission count. */
+	if (limit < count)
+		limit = count;
+	if (total > limit) {
+		for (i = 0; i < count; ++i) {
+			int left = count - i - 1;
+			if (rates[i].count > limit - left)
+				rates[i].count = limit - left;
+			limit -= rates[i].count;
+		}
+	}
+
+	/* HACK!!! Device has problems (at least) switching from
+	 * 54Mbps CTS to 1Mbps. This switch takes enormous amount
+	 * of time (100-200 ms), leading to valuable throughput drop.
+	 * As a workaround, additional g-rates are injected to the
+	 * policy.
+	 */
+	if (count == 2 && !(rates[0].flags & IEEE80211_TX_RC_MCS) &&
+	    rates[0].idx > 4 && rates[0].count > 2 &&
+	    rates[1].idx < 2) {
+		/* ">> 1" is an equivalent of "/ 2", but faster */
+		int mid_rate = (rates[0].idx + 4) >> 1;
+
+		/* Decrease number of retries for the initial rate */
+		rates[0].count -= 2;
+
+		if (mid_rate != 4) {
+			/* Keep fallback rate at 1Mbps. */
+			rates[3] = rates[1];
+
+			/* Inject 1 transmission on lowest g-rate */
+			rates[2].idx = 4;
+			rates[2].count = 1;
+			rates[2].flags = rates[1].flags;
+
+			/* Inject 1 transmission on mid-rate */
+			rates[1].idx = mid_rate;
+			rates[1].count = 1;
+
+			/* Fallback to 1 Mbps is a really bad thing,
+			 * so let's try to increase probability of
+			 * successful transmission on the lowest g rate
+			 * even more */
+			if (rates[0].count >= 3) {
+				--rates[0].count;
+				++rates[2].count;
+			}
+
+			/* Adjust amount of rates defined */
+			count += 2;
+		} else {
+			/* Keep fallback rate at 1Mbps. */
+			rates[2] = rates[1];
+
+			/* Inject 2 transmissions on lowest g-rate */
+			rates[1].idx = 4;
+			rates[1].count = 2;
+
+			/* Adjust amount of rates defined */
+			count += 1;
+		}
+	}
+
+	policy->defined = cw1200_get_tx_rate(priv, &rates[0])->hw_value + 1;
+
+	for (i = 0; i < count; ++i) {
+		register unsigned rateid, off, shift, retries;
+
+		rateid = cw1200_get_tx_rate(priv, &rates[i])->hw_value;
+		off = rateid >> 3;		/* eq. rateid / 8 */
+		shift = (rateid & 0x07) << 2;	/* eq. (rateid % 8) * 4 */
+
+		retries = rates[i].count;
+		if (retries > 0x0F) {
+			rates[i].count = 0x0f;
+			retries = 0x0F;
+		}
+		policy->tbl[off] |= __cpu_to_le32(retries << shift);
+		policy->retry_count += retries;
+	}
+
+	pr_debug("[TX policy] Policy (%zu): %d:%d, %d:%d, %d:%d, %d:%d, %d:%d\n",
+		 count,
+		 rates[0].idx, rates[0].count,
+		 rates[1].idx, rates[1].count,
+		 rates[2].idx, rates[2].count,
+		 rates[3].idx, rates[3].count,
+		 rates[4].idx, rates[4].count);
+}
+
+static inline bool tx_policy_is_equal(const struct tx_policy *wanted,
+					const struct tx_policy *cached)
+{
+	size_t count = wanted->defined >> 1;
+	if (wanted->defined > cached->defined)
+		return false;
+	if (count) {
+		if (memcmp(wanted->raw, cached->raw, count))
+			return false;
+	}
+	if (wanted->defined & 1) {
+		if ((wanted->raw[count] & 0x0F) != (cached->raw[count] & 0x0F))
+			return false;
+	}
+	return true;
+}
+
+static int tx_policy_find(struct tx_policy_cache *cache,
+				const struct tx_policy *wanted)
+{
+	/* O(n) complexity. Not so good, but there's only 8 entries in
+	 * the cache.
+	 * Also lru helps to reduce search time. */
+	struct tx_policy_cache_entry *it;
+	/* First search for policy in "used" list */
+	list_for_each_entry(it, &cache->used, link) {
+		if (tx_policy_is_equal(wanted, &it->policy))
+			return it - cache->cache;
+	}
+	/* Then - in "free list" */
+	list_for_each_entry(it, &cache->free, link) {
+		if (tx_policy_is_equal(wanted, &it->policy))
+			return it - cache->cache;
+	}
+	return -1;
+}
+
+static inline void tx_policy_use(struct tx_policy_cache *cache,
+				 struct tx_policy_cache_entry *entry)
+{
+	++entry->policy.usage_count;
+	list_move(&entry->link, &cache->used);
+}
+
+static inline int tx_policy_release(struct tx_policy_cache *cache,
+				    struct tx_policy_cache_entry *entry)
+{
+	int ret = --entry->policy.usage_count;
+	if (!ret)
+		list_move(&entry->link, &cache->free);
+	return ret;
+}
+
+void tx_policy_clean(struct cw1200_common *priv)
+{
+	int idx, locked;
+	struct tx_policy_cache *cache = &priv->tx_policy_cache;
+	struct tx_policy_cache_entry *entry;
+
+	cw1200_tx_queues_lock(priv);
+	spin_lock_bh(&cache->lock);
+	locked = list_empty(&cache->free);
+
+	for (idx = 0; idx < TX_POLICY_CACHE_SIZE; idx++) {
+		entry = &cache->cache[idx];
+		/* Policy usage count should be 0 at this time as all queues
+		   should be empty */
+		if (WARN_ON(entry->policy.usage_count)) {
+			entry->policy.usage_count = 0;
+			list_move(&entry->link, &cache->free);
+		}
+		memset(&entry->policy, 0, sizeof(entry->policy));
+	}
+	if (locked)
+		cw1200_tx_queues_unlock(priv);
+
+	cw1200_tx_queues_unlock(priv);
+	spin_unlock_bh(&cache->lock);
+}
+
+/* ******************************************************************** */
+/* External TX policy cache API						*/
+
+void tx_policy_init(struct cw1200_common *priv)
+{
+	struct tx_policy_cache *cache = &priv->tx_policy_cache;
+	int i;
+
+	memset(cache, 0, sizeof(*cache));
+
+	spin_lock_init(&cache->lock);
+	INIT_LIST_HEAD(&cache->used);
+	INIT_LIST_HEAD(&cache->free);
+
+	for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i)
+		list_add(&cache->cache[i].link, &cache->free);
+}
+
+static int tx_policy_get(struct cw1200_common *priv,
+		  struct ieee80211_tx_rate *rates,
+		  size_t count, bool *renew)
+{
+	int idx;
+	struct tx_policy_cache *cache = &priv->tx_policy_cache;
+	struct tx_policy wanted;
+
+	tx_policy_build(priv, &wanted, rates, count);
+
+	spin_lock_bh(&cache->lock);
+	if (WARN_ON_ONCE(list_empty(&cache->free))) {
+		spin_unlock_bh(&cache->lock);
+		return CW1200_INVALID_RATE_ID;
+	}
+	idx = tx_policy_find(cache, &wanted);
+	if (idx >= 0) {
+		pr_debug("[TX policy] Used TX policy: %d\n", idx);
+		*renew = false;
+	} else {
+		struct tx_policy_cache_entry *entry;
+		*renew = true;
+		/* If policy is not found create a new one
+		 * using the oldest entry in "free" list */
+		entry = list_entry(cache->free.prev,
+			struct tx_policy_cache_entry, link);
+		entry->policy = wanted;
+		idx = entry - cache->cache;
+		pr_debug("[TX policy] New TX policy: %d\n", idx);
+		tx_policy_dump(&entry->policy);
+	}
+	tx_policy_use(cache, &cache->cache[idx]);
+	if (list_empty(&cache->free)) {
+		/* Lock TX queues. */
+		cw1200_tx_queues_lock(priv);
+	}
+	spin_unlock_bh(&cache->lock);
+	return idx;
+}
+
+static void tx_policy_put(struct cw1200_common *priv, int idx)
+{
+	int usage, locked;
+	struct tx_policy_cache *cache = &priv->tx_policy_cache;
+
+	spin_lock_bh(&cache->lock);
+	locked = list_empty(&cache->free);
+	usage = tx_policy_release(cache, &cache->cache[idx]);
+	if (locked && !usage) {
+		/* Unlock TX queues. */
+		cw1200_tx_queues_unlock(priv);
+	}
+	spin_unlock_bh(&cache->lock);
+}
+
+static int tx_policy_upload(struct cw1200_common *priv)
+{
+	struct tx_policy_cache *cache = &priv->tx_policy_cache;
+	int i;
+	struct wsm_set_tx_rate_retry_policy arg = {
+		.num = 0,
+	};
+	spin_lock_bh(&cache->lock);
+
+	/* Upload only modified entries. */
+	for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i) {
+		struct tx_policy *src = &cache->cache[i].policy;
+		if (src->retry_count && !src->uploaded) {
+			struct wsm_tx_rate_retry_policy *dst =
+				&arg.tbl[arg.num];
+			dst->index = i;
+			dst->short_retries = priv->short_frame_max_tx_count;
+			dst->long_retries = priv->long_frame_max_tx_count;
+
+			dst->flags = WSM_TX_RATE_POLICY_FLAG_TERMINATE_WHEN_FINISHED |
+				WSM_TX_RATE_POLICY_FLAG_COUNT_INITIAL_TRANSMIT;
+			memcpy(dst->rate_count_indices, src->tbl,
+			       sizeof(dst->rate_count_indices));
+			src->uploaded = 1;
+			++arg.num;
+		}
+	}
+	spin_unlock_bh(&cache->lock);
+	cw1200_debug_tx_cache_miss(priv);
+	pr_debug("[TX policy] Upload %d policies\n", arg.num);
+	return wsm_set_tx_rate_retry_policy(priv, &arg);
+}
+
+void tx_policy_upload_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, tx_policy_upload_work);
+
+	pr_debug("[TX] TX policy upload.\n");
+	tx_policy_upload(priv);
+
+	wsm_unlock_tx(priv);
+	cw1200_tx_queues_unlock(priv);
+}
+
+/* ******************************************************************** */
+/* cw1200 TX implementation						*/
+
+struct cw1200_txinfo {
+	struct sk_buff *skb;
+	unsigned queue;
+	struct ieee80211_tx_info *tx_info;
+	const struct ieee80211_rate *rate;
+	struct ieee80211_hdr *hdr;
+	size_t hdrlen;
+	const u8 *da;
+	struct cw1200_sta_priv *sta_priv;
+	struct ieee80211_sta *sta;
+	struct cw1200_txpriv txpriv;
+};
+
+u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv, u32 rates)
+{
+	u32 ret = 0;
+	int i;
+	for (i = 0; i < 32; ++i) {
+		if (rates & BIT(i))
+			ret |= BIT(priv->rates[i].hw_value);
+	}
+	return ret;
+}
+
+static const struct ieee80211_rate *
+cw1200_get_tx_rate(const struct cw1200_common *priv,
+		   const struct ieee80211_tx_rate *rate)
+{
+	if (rate->idx < 0)
+		return NULL;
+	if (rate->flags & IEEE80211_TX_RC_MCS)
+		return &priv->mcs_rates[rate->idx];
+	return &priv->hw->wiphy->bands[priv->channel->band]->
+		bitrates[rate->idx];
+}
+
+static int
+cw1200_tx_h_calc_link_ids(struct cw1200_common *priv,
+			  struct cw1200_txinfo *t)
+{
+	if (t->sta && t->sta_priv->link_id)
+		t->txpriv.raw_link_id =
+				t->txpriv.link_id =
+				t->sta_priv->link_id;
+	else if (priv->mode != NL80211_IFTYPE_AP)
+		t->txpriv.raw_link_id =
+				t->txpriv.link_id = 0;
+	else if (is_multicast_ether_addr(t->da)) {
+		if (priv->enable_beacon) {
+			t->txpriv.raw_link_id = 0;
+			t->txpriv.link_id = CW1200_LINK_ID_AFTER_DTIM;
+		} else {
+			t->txpriv.raw_link_id = 0;
+			t->txpriv.link_id = 0;
+		}
+	} else {
+		t->txpriv.link_id = cw1200_find_link_id(priv, t->da);
+		if (!t->txpriv.link_id)
+			t->txpriv.link_id = cw1200_alloc_link_id(priv, t->da);
+		if (!t->txpriv.link_id) {
+			wiphy_err(priv->hw->wiphy,
+				  "No more link IDs available.\n");
+			return -ENOENT;
+		}
+		t->txpriv.raw_link_id = t->txpriv.link_id;
+	}
+	if (t->txpriv.raw_link_id)
+		priv->link_id_db[t->txpriv.raw_link_id - 1].timestamp =
+				jiffies;
+	if (t->sta && (t->sta->uapsd_queues & BIT(t->queue)))
+		t->txpriv.link_id = CW1200_LINK_ID_UAPSD;
+	return 0;
+}
+
+static void
+cw1200_tx_h_pm(struct cw1200_common *priv,
+	       struct cw1200_txinfo *t)
+{
+	if (ieee80211_is_auth(t->hdr->frame_control)) {
+		u32 mask = ~BIT(t->txpriv.raw_link_id);
+		spin_lock_bh(&priv->ps_state_lock);
+		priv->sta_asleep_mask &= mask;
+		priv->pspoll_mask &= mask;
+		spin_unlock_bh(&priv->ps_state_lock);
+	}
+}
+
+static void
+cw1200_tx_h_calc_tid(struct cw1200_common *priv,
+		     struct cw1200_txinfo *t)
+{
+	if (ieee80211_is_data_qos(t->hdr->frame_control)) {
+		u8 *qos = ieee80211_get_qos_ctl(t->hdr);
+		t->txpriv.tid = qos[0] & IEEE80211_QOS_CTL_TID_MASK;
+	} else if (ieee80211_is_data(t->hdr->frame_control)) {
+		t->txpriv.tid = 0;
+	}
+}
+
+static int
+cw1200_tx_h_crypt(struct cw1200_common *priv,
+		  struct cw1200_txinfo *t)
+{
+	if (!t->tx_info->control.hw_key ||
+	    !ieee80211_has_protected(t->hdr->frame_control))
+		return 0;
+
+	t->hdrlen += t->tx_info->control.hw_key->iv_len;
+	skb_put(t->skb, t->tx_info->control.hw_key->icv_len);
+
+	if (t->tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
+		skb_put(t->skb, 8); /* MIC space */
+
+	return 0;
+}
+
+static int
+cw1200_tx_h_align(struct cw1200_common *priv,
+		  struct cw1200_txinfo *t,
+		  u8 *flags)
+{
+	size_t offset = (size_t)t->skb->data & 3;
+
+	if (!offset)
+		return 0;
+
+	if (offset & 1) {
+		wiphy_err(priv->hw->wiphy,
+			  "Bug: attempt to transmit a frame with wrong alignment: %zu\n",
+			  offset);
+		return -EINVAL;
+	}
+
+	if (skb_headroom(t->skb) < offset) {
+		wiphy_err(priv->hw->wiphy,
+			  "Bug: no space allocated for DMA alignment. headroom: %d\n",
+			  skb_headroom(t->skb));
+		return -ENOMEM;
+	}
+	skb_push(t->skb, offset);
+	t->hdrlen += offset;
+	t->txpriv.offset += offset;
+	*flags |= WSM_TX_2BYTES_SHIFT;
+	cw1200_debug_tx_align(priv);
+	return 0;
+}
+
+static int
+cw1200_tx_h_action(struct cw1200_common *priv,
+		   struct cw1200_txinfo *t)
+{
+	struct ieee80211_mgmt *mgmt =
+		(struct ieee80211_mgmt *)t->hdr;
+	if (ieee80211_is_action(t->hdr->frame_control) &&
+	    mgmt->u.action.category == WLAN_CATEGORY_BACK)
+		return 1;
+	else
+		return 0;
+}
+
+/* Add WSM header */
+static struct wsm_tx *
+cw1200_tx_h_wsm(struct cw1200_common *priv,
+		struct cw1200_txinfo *t)
+{
+	struct wsm_tx *wsm;
+
+	if (skb_headroom(t->skb) < sizeof(struct wsm_tx)) {
+		wiphy_err(priv->hw->wiphy,
+			  "Bug: no space allocated for WSM header. headroom: %d\n",
+			  skb_headroom(t->skb));
+		return NULL;
+	}
+
+	wsm = (struct wsm_tx *)skb_push(t->skb, sizeof(struct wsm_tx));
+	t->txpriv.offset += sizeof(struct wsm_tx);
+	memset(wsm, 0, sizeof(*wsm));
+	wsm->hdr.len = __cpu_to_le16(t->skb->len);
+	wsm->hdr.id = __cpu_to_le16(0x0004);
+	wsm->queue_id = wsm_queue_id_to_wsm(t->queue);
+	return wsm;
+}
+
+/* BT Coex specific handling */
+static void
+cw1200_tx_h_bt(struct cw1200_common *priv,
+	       struct cw1200_txinfo *t,
+	       struct wsm_tx *wsm)
+{
+	u8 priority = 0;
+
+	if (!priv->bt_present)
+		return;
+
+	if (ieee80211_is_nullfunc(t->hdr->frame_control)) {
+		priority = WSM_EPTA_PRIORITY_MGT;
+	} else if (ieee80211_is_data(t->hdr->frame_control)) {
+		/* Skip LLC SNAP header (+6) */
+		u8 *payload = &t->skb->data[t->hdrlen];
+		u16 *ethertype = (u16 *)&payload[6];
+		if (*ethertype == __be16_to_cpu(ETH_P_PAE))
+			priority = WSM_EPTA_PRIORITY_EAPOL;
+	} else if (ieee80211_is_assoc_req(t->hdr->frame_control) ||
+		ieee80211_is_reassoc_req(t->hdr->frame_control)) {
+		struct ieee80211_mgmt *mgt_frame =
+				(struct ieee80211_mgmt *)t->hdr;
+
+		if (mgt_frame->u.assoc_req.listen_interval <
+						priv->listen_interval) {
+			pr_debug("Modified Listen Interval to %d from %d\n",
+				 priv->listen_interval,
+				 mgt_frame->u.assoc_req.listen_interval);
+			/* Replace listen interval derieved from
+			 * the one read from SDD */
+			mgt_frame->u.assoc_req.listen_interval =
+				priv->listen_interval;
+		}
+	}
+
+	if (!priority) {
+		if (ieee80211_is_action(t->hdr->frame_control))
+			priority = WSM_EPTA_PRIORITY_ACTION;
+		else if (ieee80211_is_mgmt(t->hdr->frame_control))
+			priority = WSM_EPTA_PRIORITY_MGT;
+		else if ((wsm->queue_id == WSM_QUEUE_VOICE))
+			priority = WSM_EPTA_PRIORITY_VOICE;
+		else if ((wsm->queue_id == WSM_QUEUE_VIDEO))
+			priority = WSM_EPTA_PRIORITY_VIDEO;
+		else
+			priority = WSM_EPTA_PRIORITY_DATA;
+	}
+
+	pr_debug("[TX] EPTA priority %d.\n", priority);
+
+	wsm->flags |= priority << 1;
+}
+
+static int
+cw1200_tx_h_rate_policy(struct cw1200_common *priv,
+			struct cw1200_txinfo *t,
+			struct wsm_tx *wsm)
+{
+	bool tx_policy_renew = false;
+
+	t->txpriv.rate_id = tx_policy_get(priv,
+		t->tx_info->control.rates, IEEE80211_TX_MAX_RATES,
+		&tx_policy_renew);
+	if (t->txpriv.rate_id == CW1200_INVALID_RATE_ID)
+		return -EFAULT;
+
+	wsm->flags |= t->txpriv.rate_id << 4;
+
+	t->rate = cw1200_get_tx_rate(priv,
+		&t->tx_info->control.rates[0]),
+	wsm->max_tx_rate = t->rate->hw_value;
+	if (t->rate->flags & IEEE80211_TX_RC_MCS) {
+		if (cw1200_ht_greenfield(&priv->ht_info))
+			wsm->ht_tx_parameters |=
+				__cpu_to_le32(WSM_HT_TX_GREENFIELD);
+		else
+			wsm->ht_tx_parameters |=
+				__cpu_to_le32(WSM_HT_TX_MIXED);
+	}
+
+	if (tx_policy_renew) {
+		pr_debug("[TX] TX policy renew.\n");
+		/* It's not so optimal to stop TX queues every now and then.
+		 * Better to reimplement task scheduling with
+		 * a counter. TODO. */
+		wsm_lock_tx_async(priv);
+		cw1200_tx_queues_lock(priv);
+		if (queue_work(priv->workqueue,
+			       &priv->tx_policy_upload_work) <= 0) {
+			cw1200_tx_queues_unlock(priv);
+			wsm_unlock_tx(priv);
+		}
+	}
+	return 0;
+}
+
+static bool
+cw1200_tx_h_pm_state(struct cw1200_common *priv,
+		     struct cw1200_txinfo *t)
+{
+	int was_buffered = 1;
+
+	if (t->txpriv.link_id == CW1200_LINK_ID_AFTER_DTIM &&
+	    !priv->buffered_multicasts) {
+		priv->buffered_multicasts = true;
+		if (priv->sta_asleep_mask)
+			queue_work(priv->workqueue,
+				   &priv->multicast_start_work);
+	}
+
+	if (t->txpriv.raw_link_id && t->txpriv.tid < CW1200_MAX_TID)
+		was_buffered = priv->link_id_db[t->txpriv.raw_link_id - 1].buffered[t->txpriv.tid]++;
+
+	return !was_buffered;
+}
+
+/* ******************************************************************** */
+
+void cw1200_tx(struct ieee80211_hw *dev,
+	       struct ieee80211_tx_control *control,
+	       struct sk_buff *skb)
+{
+	struct cw1200_common *priv = dev->priv;
+	struct cw1200_txinfo t = {
+		.skb = skb,
+		.queue = skb_get_queue_mapping(skb),
+		.tx_info = IEEE80211_SKB_CB(skb),
+		.hdr = (struct ieee80211_hdr *)skb->data,
+		.txpriv.tid = CW1200_MAX_TID,
+		.txpriv.rate_id = CW1200_INVALID_RATE_ID,
+	};
+	struct ieee80211_sta *sta;
+	struct wsm_tx *wsm;
+	bool tid_update = 0;
+	u8 flags = 0;
+	int ret;
+
+	if (priv->bh_error)
+		goto drop;
+
+	t.hdrlen = ieee80211_hdrlen(t.hdr->frame_control);
+	t.da = ieee80211_get_DA(t.hdr);
+	if (control) {
+		t.sta = control->sta;
+		t.sta_priv = (struct cw1200_sta_priv *)&t.sta->drv_priv;
+	}
+
+	if (WARN_ON(t.queue >= 4))
+		goto drop;
+
+	ret = cw1200_tx_h_calc_link_ids(priv, &t);
+	if (ret)
+		goto drop;
+
+	pr_debug("[TX] TX %d bytes (queue: %d, link_id: %d (%d)).\n",
+		 skb->len, t.queue, t.txpriv.link_id,
+		 t.txpriv.raw_link_id);
+
+	cw1200_tx_h_pm(priv, &t);
+	cw1200_tx_h_calc_tid(priv, &t);
+	ret = cw1200_tx_h_crypt(priv, &t);
+	if (ret)
+		goto drop;
+	ret = cw1200_tx_h_align(priv, &t, &flags);
+	if (ret)
+		goto drop;
+	ret = cw1200_tx_h_action(priv, &t);
+	if (ret)
+		goto drop;
+	wsm = cw1200_tx_h_wsm(priv, &t);
+	if (!wsm) {
+		ret = -ENOMEM;
+		goto drop;
+	}
+	wsm->flags |= flags;
+	cw1200_tx_h_bt(priv, &t, wsm);
+	ret = cw1200_tx_h_rate_policy(priv, &t, wsm);
+	if (ret)
+		goto drop;
+
+	rcu_read_lock();
+	sta = rcu_dereference(t.sta);
+
+	spin_lock_bh(&priv->ps_state_lock);
+	{
+		tid_update = cw1200_tx_h_pm_state(priv, &t);
+		BUG_ON(cw1200_queue_put(&priv->tx_queue[t.queue],
+					t.skb, &t.txpriv));
+	}
+	spin_unlock_bh(&priv->ps_state_lock);
+
+	if (tid_update && sta)
+		ieee80211_sta_set_buffered(sta, t.txpriv.tid, true);
+
+	rcu_read_unlock();
+
+	cw1200_bh_wakeup(priv);
+
+	return;
+
+drop:
+	cw1200_skb_dtor(priv, skb, &t.txpriv);
+	return;
+}
+
+/* ******************************************************************** */
+
+static int cw1200_handle_action_rx(struct cw1200_common *priv,
+				   struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+
+	/* Filter block ACK negotiation: fully controlled by firmware */
+	if (mgmt->u.action.category == WLAN_CATEGORY_BACK)
+		return 1;
+
+	return 0;
+}
+
+static int cw1200_handle_pspoll(struct cw1200_common *priv,
+				struct sk_buff *skb)
+{
+	struct ieee80211_sta *sta;
+	struct ieee80211_pspoll *pspoll = (struct ieee80211_pspoll *)skb->data;
+	int link_id = 0;
+	u32 pspoll_mask = 0;
+	int drop = 1;
+	int i;
+
+	if (priv->join_status != CW1200_JOIN_STATUS_AP)
+		goto done;
+	if (memcmp(priv->vif->addr, pspoll->bssid, ETH_ALEN))
+		goto done;
+
+	rcu_read_lock();
+	sta = ieee80211_find_sta(priv->vif, pspoll->ta);
+	if (sta) {
+		struct cw1200_sta_priv *sta_priv;
+		sta_priv = (struct cw1200_sta_priv *)&sta->drv_priv;
+		link_id = sta_priv->link_id;
+		pspoll_mask = BIT(sta_priv->link_id);
+	}
+	rcu_read_unlock();
+	if (!link_id)
+		goto done;
+
+	priv->pspoll_mask |= pspoll_mask;
+	drop = 0;
+
+	/* Do not report pspols if data for given link id is
+	 * queued already. */
+	for (i = 0; i < 4; ++i) {
+		if (cw1200_queue_get_num_queued(&priv->tx_queue[i],
+						pspoll_mask)) {
+			cw1200_bh_wakeup(priv);
+			drop = 1;
+			break;
+		}
+	}
+	pr_debug("[RX] PSPOLL: %s\n", drop ? "local" : "fwd");
+done:
+	return drop;
+}
+
+/* ******************************************************************** */
+
+void cw1200_tx_confirm_cb(struct cw1200_common *priv,
+			  int link_id,
+			  struct wsm_tx_confirm *arg)
+{
+	u8 queue_id = cw1200_queue_get_queue_id(arg->packet_id);
+	struct cw1200_queue *queue = &priv->tx_queue[queue_id];
+	struct sk_buff *skb;
+	const struct cw1200_txpriv *txpriv;
+
+	pr_debug("[TX] TX confirm: %d, %d.\n",
+		 arg->status, arg->ack_failures);
+
+	if (cw1200_itp_tx_running(priv))
+		return;
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
+		/* STA is stopped. */
+		return;
+	}
+
+	if (WARN_ON(queue_id >= 4))
+		return;
+
+	if (arg->status)
+		pr_debug("TX failed: %d.\n", arg->status);
+
+	if ((arg->status == WSM_REQUEUE) &&
+	    (arg->flags & WSM_TX_STATUS_REQUEUE)) {
+		/* "Requeue" means "implicit suspend" */
+		struct wsm_suspend_resume suspend = {
+			.link_id = link_id,
+			.stop = 1,
+			.multicast = !link_id,
+		};
+		cw1200_suspend_resume(priv, &suspend);
+		wiphy_warn(priv->hw->wiphy, "Requeue for link_id %d (try %d). STAs asleep: 0x%.8X\n",
+			   link_id,
+			   cw1200_queue_get_generation(arg->packet_id) + 1,
+			   priv->sta_asleep_mask);
+		cw1200_queue_requeue(queue, arg->packet_id);
+		spin_lock_bh(&priv->ps_state_lock);
+		if (!link_id) {
+			priv->buffered_multicasts = true;
+			if (priv->sta_asleep_mask) {
+				queue_work(priv->workqueue,
+					   &priv->multicast_start_work);
+			}
+		}
+		spin_unlock_bh(&priv->ps_state_lock);
+	} else if (!cw1200_queue_get_skb(queue, arg->packet_id,
+					 &skb, &txpriv)) {
+		struct ieee80211_tx_info *tx = IEEE80211_SKB_CB(skb);
+		int tx_count = arg->ack_failures;
+		u8 ht_flags = 0;
+		int i;
+
+		if (cw1200_ht_greenfield(&priv->ht_info))
+			ht_flags |= IEEE80211_TX_RC_GREEN_FIELD;
+
+		spin_lock(&priv->bss_loss_lock);
+		if (priv->bss_loss_state &&
+		    arg->packet_id == priv->bss_loss_confirm_id) {
+			if (arg->status) {
+				/* Recovery failed */
+				__cw1200_cqm_bssloss_sm(priv, 0, 0, 1);
+			} else {
+				/* Recovery succeeded */
+				__cw1200_cqm_bssloss_sm(priv, 0, 1, 0);
+			}
+		}
+		spin_unlock(&priv->bss_loss_lock);
+
+		if (!arg->status) {
+			tx->flags |= IEEE80211_TX_STAT_ACK;
+			++tx_count;
+			cw1200_debug_txed(priv);
+			if (arg->flags & WSM_TX_STATUS_AGGREGATION) {
+				/* Do not report aggregation to mac80211:
+				 * it confuses minstrel a lot. */
+				/* tx->flags |= IEEE80211_TX_STAT_AMPDU; */
+				cw1200_debug_txed_agg(priv);
+			}
+		} else {
+			if (tx_count)
+				++tx_count;
+		}
+
+		for (i = 0; i < IEEE80211_TX_MAX_RATES; ++i) {
+			if (tx->status.rates[i].count >= tx_count) {
+				tx->status.rates[i].count = tx_count;
+				break;
+			}
+			tx_count -= tx->status.rates[i].count;
+			if (tx->status.rates[i].flags & IEEE80211_TX_RC_MCS)
+				tx->status.rates[i].flags |= ht_flags;
+		}
+
+		for (++i; i < IEEE80211_TX_MAX_RATES; ++i) {
+			tx->status.rates[i].count = 0;
+			tx->status.rates[i].idx = -1;
+		}
+
+		/* Pull off any crypto trailers that we added on */
+		if (tx->control.hw_key) {
+			skb_trim(skb, skb->len - tx->control.hw_key->icv_len);
+			if (tx->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
+				skb_trim(skb, skb->len - 8); /* MIC space */
+		}
+		cw1200_queue_remove(queue, arg->packet_id);
+	}
+	/* XXX TODO:  Only wake if there are pending transmits.. */
+	cw1200_bh_wakeup(priv);
+}
+
+static void cw1200_notify_buffered_tx(struct cw1200_common *priv,
+			       struct sk_buff *skb, int link_id, int tid)
+{
+	struct ieee80211_sta *sta;
+	struct ieee80211_hdr *hdr;
+	u8 *buffered;
+	u8 still_buffered = 0;
+
+	if (link_id && tid < CW1200_MAX_TID) {
+		buffered = priv->link_id_db
+				[link_id - 1].buffered;
+
+		spin_lock_bh(&priv->ps_state_lock);
+		if (!WARN_ON(!buffered[tid]))
+			still_buffered = --buffered[tid];
+		spin_unlock_bh(&priv->ps_state_lock);
+
+		if (!still_buffered && tid < CW1200_MAX_TID) {
+			hdr = (struct ieee80211_hdr *)skb->data;
+			rcu_read_lock();
+			sta = ieee80211_find_sta(priv->vif, hdr->addr1);
+			if (sta)
+				ieee80211_sta_set_buffered(sta, tid, false);
+			rcu_read_unlock();
+		}
+	}
+}
+
+void cw1200_skb_dtor(struct cw1200_common *priv,
+		     struct sk_buff *skb,
+		     const struct cw1200_txpriv *txpriv)
+{
+	skb_pull(skb, txpriv->offset);
+	if (txpriv->rate_id != CW1200_INVALID_RATE_ID) {
+		cw1200_notify_buffered_tx(priv, skb,
+					  txpriv->raw_link_id, txpriv->tid);
+		tx_policy_put(priv, txpriv->rate_id);
+	}
+	if (!cw1200_is_itp(priv))
+		ieee80211_tx_status(priv->hw, skb);
+}
+
+void cw1200_rx_cb(struct cw1200_common *priv,
+		  struct wsm_rx *arg,
+		  int link_id,
+		  struct sk_buff **skb_p)
+{
+	struct sk_buff *skb = *skb_p;
+	struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb);
+	struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
+	struct cw1200_link_entry *entry = NULL;
+	unsigned long grace_period;
+
+	bool early_data = false;
+	bool p2p = priv->vif && priv->vif->p2p;
+	size_t hdrlen;
+	hdr->flag = 0;
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
+		/* STA is stopped. */
+		goto drop;
+	}
+
+	if (link_id && link_id <= CW1200_MAX_STA_IN_AP_MODE) {
+		entry =	&priv->link_id_db[link_id - 1];
+		if (entry->status == CW1200_LINK_SOFT &&
+		    ieee80211_is_data(frame->frame_control))
+			early_data = true;
+		entry->timestamp = jiffies;
+	} else if (p2p &&
+		   ieee80211_is_action(frame->frame_control) &&
+		   (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) {
+		pr_debug("[RX] Going to MAP&RESET link ID\n");
+		WARN_ON(work_pending(&priv->linkid_reset_work));
+		memcpy(&priv->action_frame_sa[0],
+		       ieee80211_get_SA(frame), ETH_ALEN);
+		priv->action_linkid = 0;
+		schedule_work(&priv->linkid_reset_work);
+	}
+
+	if (link_id && p2p &&
+	    ieee80211_is_action(frame->frame_control) &&
+	    (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) {
+		/* Link ID already exists for the ACTION frame.
+		 * Reset and Remap */
+		WARN_ON(work_pending(&priv->linkid_reset_work));
+		memcpy(&priv->action_frame_sa[0],
+		       ieee80211_get_SA(frame), ETH_ALEN);
+		priv->action_linkid = link_id;
+		schedule_work(&priv->linkid_reset_work);
+	}
+	if (arg->status) {
+		if (arg->status == WSM_STATUS_MICFAILURE) {
+			pr_debug("[RX] MIC failure.\n");
+			hdr->flag |= RX_FLAG_MMIC_ERROR;
+		} else if (arg->status == WSM_STATUS_NO_KEY_FOUND) {
+			pr_debug("[RX] No key found.\n");
+			goto drop;
+		} else {
+			pr_debug("[RX] Receive failure: %d.\n",
+				 arg->status);
+			goto drop;
+		}
+	}
+
+	if (skb->len < sizeof(struct ieee80211_pspoll)) {
+		wiphy_warn(priv->hw->wiphy, "Mailformed SDU rx'ed. Size is lesser than IEEE header.\n");
+		goto drop;
+	}
+
+	if (ieee80211_is_pspoll(frame->frame_control))
+		if (cw1200_handle_pspoll(priv, skb))
+			goto drop;
+
+	hdr->mactime = 0; /* Not supported by WSM */
+	hdr->band = ((arg->channel_number & 0xff00) ||
+		     (arg->channel_number > 14)) ?
+			IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
+	hdr->freq = ieee80211_channel_to_frequency(
+			arg->channel_number,
+			hdr->band);
+
+	if (arg->rx_rate >= 14) {
+		hdr->flag |= RX_FLAG_HT;
+		hdr->rate_idx = arg->rx_rate - 14;
+	} else if (arg->rx_rate >= 4) {
+		hdr->rate_idx = arg->rx_rate - 2;
+	} else {
+		hdr->rate_idx = arg->rx_rate;
+	}
+
+	hdr->signal = (s8)arg->rcpi_rssi;
+	hdr->antenna = 0;
+
+	hdrlen = ieee80211_hdrlen(frame->frame_control);
+
+	if (WSM_RX_STATUS_ENCRYPTION(arg->flags)) {
+		size_t iv_len = 0, icv_len = 0;
+
+		hdr->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED;
+
+		/* Oops... There is no fast way to ask mac80211 about
+		 * IV/ICV lengths. Even defineas are not exposed.*/
+		switch (WSM_RX_STATUS_ENCRYPTION(arg->flags)) {
+		case WSM_RX_STATUS_WEP:
+			iv_len = 4 /* WEP_IV_LEN */;
+			icv_len = 4 /* WEP_ICV_LEN */;
+			break;
+		case WSM_RX_STATUS_TKIP:
+			iv_len = 8 /* TKIP_IV_LEN */;
+			icv_len = 4 /* TKIP_ICV_LEN */
+				+ 8 /*MICHAEL_MIC_LEN*/;
+			hdr->flag |= RX_FLAG_MMIC_STRIPPED;
+			break;
+		case WSM_RX_STATUS_AES:
+			iv_len = 8 /* CCMP_HDR_LEN */;
+			icv_len = 8 /* CCMP_MIC_LEN */;
+			break;
+		case WSM_RX_STATUS_WAPI:
+			iv_len = 18 /* WAPI_HDR_LEN */;
+			icv_len = 16 /* WAPI_MIC_LEN */;
+			break;
+		default:
+			pr_warn("Unknown encryption type %d\n",
+				WSM_RX_STATUS_ENCRYPTION(arg->flags));
+			goto drop;
+		}
+
+		/* Firmware strips ICV in case of MIC failure. */
+		if (arg->status == WSM_STATUS_MICFAILURE)
+			icv_len = 0;
+
+		if (skb->len < hdrlen + iv_len + icv_len) {
+			wiphy_warn(priv->hw->wiphy, "Malformed SDU rx'ed. Size is lesser than crypto headers.\n");
+			goto drop;
+		}
+
+		/* Remove IV, ICV and MIC */
+		skb_trim(skb, skb->len - icv_len);
+		memmove(skb->data + iv_len, skb->data, hdrlen);
+		skb_pull(skb, iv_len);
+	}
+
+	/* Remove TSF from the end of frame */
+	if (arg->flags & WSM_RX_STATUS_TSF_INCLUDED) {
+		memcpy(&hdr->mactime, skb->data + skb->len - 8, 8);
+		hdr->mactime = le64_to_cpu(hdr->mactime);
+		if (skb->len >= 8)
+			skb_trim(skb, skb->len - 8);
+	}
+
+	cw1200_debug_rxed(priv);
+	if (arg->flags & WSM_RX_STATUS_AGGREGATE)
+		cw1200_debug_rxed_agg(priv);
+
+	if (ieee80211_is_action(frame->frame_control) &&
+	    (arg->flags & WSM_RX_STATUS_ADDRESS1)) {
+		if (cw1200_handle_action_rx(priv, skb))
+			return;
+	} else if (ieee80211_is_beacon(frame->frame_control) &&
+		   !arg->status &&
+		   !memcmp(ieee80211_get_SA(frame), priv->vif->bss_conf.bssid,
+			   ETH_ALEN)) {
+		const u8 *tim_ie;
+		u8 *ies = ((struct ieee80211_mgmt *)
+			  (skb->data))->u.beacon.variable;
+		size_t ies_len = skb->len - (ies - (u8 *)(skb->data));
+
+		tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len);
+		if (tim_ie) {
+			struct ieee80211_tim_ie *tim =
+				(struct ieee80211_tim_ie *)&tim_ie[2];
+
+			if (priv->join_dtim_period != tim->dtim_period) {
+				priv->join_dtim_period = tim->dtim_period;
+				queue_work(priv->workqueue,
+					   &priv->set_beacon_wakeup_period_work);
+			}
+		}
+
+		/* Disable beacon filter once we're associated... */
+		if (priv->disable_beacon_filter &&
+		    (priv->vif->bss_conf.assoc ||
+		     priv->vif->bss_conf.ibss_joined)) {
+			priv->disable_beacon_filter = false;
+			queue_work(priv->workqueue,
+				   &priv->update_filtering_work);
+		}
+	}
+
+	/* Stay awake after frame is received to give
+	 * userspace chance to react and acquire appropriate
+	 * wakelock. */
+	if (ieee80211_is_auth(frame->frame_control))
+		grace_period = 5 * HZ;
+	else if (ieee80211_is_deauth(frame->frame_control))
+		grace_period = 5 * HZ;
+	else
+		grace_period = 1 * HZ;
+	cw1200_pm_stay_awake(&priv->pm_state, grace_period);
+
+	if (cw1200_itp_rxed(priv, skb)) {
+		consume_skb(skb);
+	} else if (early_data) {
+		spin_lock_bh(&priv->ps_state_lock);
+		/* Double-check status with lock held */
+		if (entry->status == CW1200_LINK_SOFT)
+			skb_queue_tail(&entry->rx_queue, skb);
+		else
+			ieee80211_rx_irqsafe(priv->hw, skb);
+		spin_unlock_bh(&priv->ps_state_lock);
+	} else {
+		ieee80211_rx_irqsafe(priv->hw, skb);
+	}
+	*skb_p = NULL;
+
+	return;
+
+drop:
+	/* TODO: update failure counters */
+	return;
+}
+
+/* ******************************************************************** */
+/* Security								*/
+
+int cw1200_alloc_key(struct cw1200_common *priv)
+{
+	int idx;
+
+	idx = ffs(~priv->key_map) - 1;
+	if (idx < 0 || idx > WSM_KEY_MAX_INDEX)
+		return -1;
+
+	priv->key_map |= BIT(idx);
+	priv->keys[idx].index = idx;
+	return idx;
+}
+
+void cw1200_free_key(struct cw1200_common *priv, int idx)
+{
+	BUG_ON(!(priv->key_map & BIT(idx)));
+	memset(&priv->keys[idx], 0, sizeof(priv->keys[idx]));
+	priv->key_map &= ~BIT(idx);
+}
+
+void cw1200_free_keys(struct cw1200_common *priv)
+{
+	memset(&priv->keys, 0, sizeof(priv->keys));
+	priv->key_map = 0;
+}
+
+int cw1200_upload_keys(struct cw1200_common *priv)
+{
+	int idx, ret = 0;
+	for (idx = 0; idx <= WSM_KEY_MAX_INDEX; ++idx)
+		if (priv->key_map & BIT(idx)) {
+			ret = wsm_add_key(priv, &priv->keys[idx]);
+			if (ret < 0)
+				break;
+		}
+	return ret;
+}
+
+/* Workaround for WFD test case 6.1.10 */
+void cw1200_link_id_reset(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, linkid_reset_work);
+	int temp_linkid;
+
+	if (!priv->action_linkid) {
+		/* In GO mode we can receive ACTION frames without a linkID */
+		temp_linkid = cw1200_alloc_link_id(priv,
+				&priv->action_frame_sa[0]);
+		WARN_ON(!temp_linkid);
+		if (temp_linkid) {
+			/* Make sure we execute the WQ */
+			flush_workqueue(priv->workqueue);
+			/* Release the link ID */
+			spin_lock_bh(&priv->ps_state_lock);
+			priv->link_id_db[temp_linkid - 1].prev_status =
+				priv->link_id_db[temp_linkid - 1].status;
+			priv->link_id_db[temp_linkid - 1].status =
+				CW1200_LINK_RESET;
+			spin_unlock_bh(&priv->ps_state_lock);
+			wsm_lock_tx_async(priv);
+			if (queue_work(priv->workqueue,
+				       &priv->link_id_work) <= 0)
+				wsm_unlock_tx(priv);
+		}
+	} else {
+		spin_lock_bh(&priv->ps_state_lock);
+		priv->link_id_db[priv->action_linkid - 1].prev_status =
+			priv->link_id_db[priv->action_linkid - 1].status;
+		priv->link_id_db[priv->action_linkid - 1].status =
+			CW1200_LINK_RESET_REMAP;
+		spin_unlock_bh(&priv->ps_state_lock);
+		wsm_lock_tx_async(priv);
+		if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
+			wsm_unlock_tx(priv);
+		flush_workqueue(priv->workqueue);
+	}
+}
+
+int cw1200_find_link_id(struct cw1200_common *priv, const u8 *mac)
+{
+	int i, ret = 0;
+	spin_lock_bh(&priv->ps_state_lock);
+	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
+		if (!memcmp(mac, priv->link_id_db[i].mac, ETH_ALEN) &&
+		    priv->link_id_db[i].status) {
+			priv->link_id_db[i].timestamp = jiffies;
+			ret = i + 1;
+			break;
+		}
+	}
+	spin_unlock_bh(&priv->ps_state_lock);
+	return ret;
+}
+
+int cw1200_alloc_link_id(struct cw1200_common *priv, const u8 *mac)
+{
+	int i, ret = 0;
+	unsigned long max_inactivity = 0;
+	unsigned long now = jiffies;
+
+	spin_lock_bh(&priv->ps_state_lock);
+	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
+		if (!priv->link_id_db[i].status) {
+			ret = i + 1;
+			break;
+		} else if (priv->link_id_db[i].status != CW1200_LINK_HARD &&
+			   !priv->tx_queue_stats.link_map_cache[i + 1]) {
+			unsigned long inactivity =
+				now - priv->link_id_db[i].timestamp;
+			if (inactivity < max_inactivity)
+				continue;
+			max_inactivity = inactivity;
+			ret = i + 1;
+		}
+	}
+	if (ret) {
+		struct cw1200_link_entry *entry = &priv->link_id_db[ret - 1];
+		pr_debug("[AP] STA added, link_id: %d\n", ret);
+		entry->status = CW1200_LINK_RESERVE;
+		memcpy(&entry->mac, mac, ETH_ALEN);
+		memset(&entry->buffered, 0, CW1200_MAX_TID);
+		skb_queue_head_init(&entry->rx_queue);
+		wsm_lock_tx_async(priv);
+		if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
+			wsm_unlock_tx(priv);
+	} else {
+		wiphy_info(priv->hw->wiphy,
+			   "[AP] Early: no more link IDs available.\n");
+	}
+
+	spin_unlock_bh(&priv->ps_state_lock);
+	return ret;
+}
+
+void cw1200_link_id_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, link_id_work);
+	wsm_flush_tx(priv);
+	cw1200_link_id_gc_work(&priv->link_id_gc_work.work);
+	wsm_unlock_tx(priv);
+}
+
+void cw1200_link_id_gc_work(struct work_struct *work)
+{
+	struct cw1200_common *priv =
+		container_of(work, struct cw1200_common, link_id_gc_work.work);
+	struct wsm_reset reset = {
+		.reset_statistics = false,
+	};
+	struct wsm_map_link map_link = {
+		.link_id = 0,
+	};
+	unsigned long now = jiffies;
+	unsigned long next_gc = -1;
+	long ttl;
+	bool need_reset;
+	u32 mask;
+	int i;
+
+	if (priv->join_status != CW1200_JOIN_STATUS_AP)
+		return;
+
+	wsm_lock_tx(priv);
+	spin_lock_bh(&priv->ps_state_lock);
+	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
+		need_reset = false;
+		mask = BIT(i + 1);
+		if (priv->link_id_db[i].status == CW1200_LINK_RESERVE ||
+		    (priv->link_id_db[i].status == CW1200_LINK_HARD &&
+		     !(priv->link_id_map & mask))) {
+			if (priv->link_id_map & mask) {
+				priv->sta_asleep_mask &= ~mask;
+				priv->pspoll_mask &= ~mask;
+				need_reset = true;
+			}
+			priv->link_id_map |= mask;
+			if (priv->link_id_db[i].status != CW1200_LINK_HARD)
+				priv->link_id_db[i].status = CW1200_LINK_SOFT;
+			memcpy(map_link.mac_addr, priv->link_id_db[i].mac,
+			       ETH_ALEN);
+			spin_unlock_bh(&priv->ps_state_lock);
+			if (need_reset) {
+				reset.link_id = i + 1;
+				wsm_reset(priv, &reset);
+			}
+			map_link.link_id = i + 1;
+			wsm_map_link(priv, &map_link);
+			next_gc = min(next_gc, CW1200_LINK_ID_GC_TIMEOUT);
+			spin_lock_bh(&priv->ps_state_lock);
+		} else if (priv->link_id_db[i].status == CW1200_LINK_SOFT) {
+			ttl = priv->link_id_db[i].timestamp - now +
+					CW1200_LINK_ID_GC_TIMEOUT;
+			if (ttl <= 0) {
+				need_reset = true;
+				priv->link_id_db[i].status = CW1200_LINK_OFF;
+				priv->link_id_map &= ~mask;
+				priv->sta_asleep_mask &= ~mask;
+				priv->pspoll_mask &= ~mask;
+				memset(map_link.mac_addr, 0, ETH_ALEN);
+				spin_unlock_bh(&priv->ps_state_lock);
+				reset.link_id = i + 1;
+				wsm_reset(priv, &reset);
+				spin_lock_bh(&priv->ps_state_lock);
+			} else {
+				next_gc = min_t(unsigned long, next_gc, ttl);
+			}
+		} else if (priv->link_id_db[i].status == CW1200_LINK_RESET ||
+				priv->link_id_db[i].status ==
+				CW1200_LINK_RESET_REMAP) {
+			int status = priv->link_id_db[i].status;
+			priv->link_id_db[i].status =
+					priv->link_id_db[i].prev_status;
+			priv->link_id_db[i].timestamp = now;
+			reset.link_id = i + 1;
+			spin_unlock_bh(&priv->ps_state_lock);
+			wsm_reset(priv, &reset);
+			if (status == CW1200_LINK_RESET_REMAP) {
+				memcpy(map_link.mac_addr,
+				       priv->link_id_db[i].mac,
+				       ETH_ALEN);
+				map_link.link_id = i + 1;
+				wsm_map_link(priv, &map_link);
+				next_gc = min(next_gc,
+						CW1200_LINK_ID_GC_TIMEOUT);
+			}
+			spin_lock_bh(&priv->ps_state_lock);
+		}
+		if (need_reset) {
+			skb_queue_purge(&priv->link_id_db[i].rx_queue);
+			pr_debug("[AP] STA removed, link_id: %d\n",
+				 reset.link_id);
+		}
+	}
+	spin_unlock_bh(&priv->ps_state_lock);
+	if (next_gc != -1)
+		queue_delayed_work(priv->workqueue,
+				   &priv->link_id_gc_work, next_gc);
+	wsm_unlock_tx(priv);
+}

drivers/net/wireless/cw1200/txrx.h

+/*
+ * Datapath interface for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_TXRX_H
+#define CW1200_TXRX_H
+
+#include <linux/list.h>
+
+/* extern */ struct ieee80211_hw;
+/* extern */ struct sk_buff;
+/* extern */ struct wsm_tx;
+/* extern */ struct wsm_rx;
+/* extern */ struct wsm_tx_confirm;
+/* extern */ struct cw1200_txpriv;
+
+struct tx_policy {
+	union {
+		__le32 tbl[3];
+		u8 raw[12];
+	};
+	u8  defined;
+	u8  usage_count;
+	u8  retry_count;
+	u8  uploaded;
+};
+
+struct tx_policy_cache_entry {
+	struct tx_policy policy;
+	struct list_head link;
+};
+
+#define TX_POLICY_CACHE_SIZE	(8)
+struct tx_policy_cache {
+	struct tx_policy_cache_entry cache[TX_POLICY_CACHE_SIZE];
+	struct list_head used;
+	struct list_head free;
+	spinlock_t lock; /* Protect policy cache */
+};
+
+/* ******************************************************************** */
+/* TX policy cache							*/
+/* Intention of TX policy cache is an overcomplicated WSM API.
+ * Device does not accept per-PDU tx retry sequence.
+ * It uses "tx retry policy id" instead, so driver code has to sync
+ * linux tx retry sequences with a retry policy table in the device.
+ */
+void tx_policy_init(struct cw1200_common *priv);
+void tx_policy_upload_work(struct work_struct *work);
+void tx_policy_clean(struct cw1200_common *priv);
+
+/* ******************************************************************** */
+/* TX implementation							*/
+
+u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv,
+			       u32 rates);
+void cw1200_tx(struct ieee80211_hw *dev,
+	       struct ieee80211_tx_control *control,
+	       struct sk_buff *skb);
+void cw1200_skb_dtor(struct cw1200_common *priv,
+		     struct sk_buff *skb,
+		     const struct cw1200_txpriv *txpriv);
+
+/* ******************************************************************** */
+/* WSM callbacks							*/
+
+void cw1200_tx_confirm_cb(struct cw1200_common *priv,
+			  int link_id,
+			  struct wsm_tx_confirm *arg);
+void cw1200_rx_cb(struct cw1200_common *priv,
+		  struct wsm_rx *arg,
+		  int link_id,
+		  struct sk_buff **skb_p);
+
+/* ******************************************************************** */
+/* Timeout								*/
+
+void cw1200_tx_timeout(struct work_struct *work);
+
+/* ******************************************************************** */
+/* Security								*/
+int cw1200_alloc_key(struct cw1200_common *priv);
+void cw1200_free_key(struct cw1200_common *priv, int idx);
+void cw1200_free_keys(struct cw1200_common *priv);
+int cw1200_upload_keys(struct cw1200_common *priv);
+
+/* ******************************************************************** */
+/* Workaround for WFD test case 6.1.10					*/
+void cw1200_link_id_reset(struct work_struct *work);
+
+#define CW1200_LINK_ID_GC_TIMEOUT ((unsigned long)(10 * HZ))
+
+int cw1200_find_link_id(struct cw1200_common *priv, const u8 *mac);
+int cw1200_alloc_link_id(struct cw1200_common *priv, const u8 *mac);
+void cw1200_link_id_work(struct work_struct *work);
+void cw1200_link_id_gc_work(struct work_struct *work);
+
+
+#endif /* CW1200_TXRX_H */

drivers/net/wireless/cw1200/wsm.c

+/*
+ * WSM host interface (HI) implementation for
+ * ST-Ericsson CW1200 mac80211 drivers.
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
+#include "cw1200.h"
+#include "wsm.h"
+#include "bh.h"
+#include "sta.h"
+#include "debug.h"
+#include "itp.h"
+
+#define WSM_CMD_TIMEOUT		(2 * HZ) /* With respect to interrupt loss */
+#define WSM_CMD_START_TIMEOUT	(7 * HZ)
+#define WSM_CMD_RESET_TIMEOUT	(3 * HZ) /* 2 sec. timeout was observed.   */
+#define WSM_CMD_MAX_TIMEOUT	(3 * HZ)
+
+#define WSM_SKIP(buf, size)						\
+	do {								\
+		if ((buf)->data + size > (buf)->end)			\
+			goto underflow;					\
+		(buf)->data += size;					\
+	} while (0)
+
+#define WSM_GET(buf, ptr, size)						\
+	do {								\
+		if ((buf)->data + size > (buf)->end)			\
+			goto underflow;					\
+		memcpy(ptr, (buf)->data, size);				\
+		(buf)->data += size;					\
+	} while (0)
+
+#define __WSM_GET(buf, type, cvt)					\
+	({								\
+		type val;						\
+		if ((buf)->data + sizeof(type) > (buf)->end)		\
+			goto underflow;					\
+		val = cvt(*(type *)(buf)->data);			\
+		(buf)->data += sizeof(type);				\
+		val;							\
+	})
+
+#define WSM_GET8(buf)  __WSM_GET(buf, u8, (u8))
+#define WSM_GET16(buf) __WSM_GET(buf, u16, __le16_to_cpu)
+#define WSM_GET32(buf) __WSM_GET(buf, u32, __le32_to_cpu)
+
+#define WSM_PUT(buf, ptr, size)						\
+	do {								\
+		if ((buf)->data + size > (buf)->end)		\
+			if (wsm_buf_reserve((buf), size))	\
+				goto nomem;				\
+		memcpy((buf)->data, ptr, size);				\
+		(buf)->data += size;					\
+	} while (0)
+
+#define __WSM_PUT(buf, val, type, cvt)					\
+	do {								\
+		if ((buf)->data + sizeof(type) > (buf)->end)		\
+			if (wsm_buf_reserve((buf), sizeof(type))) \
+				goto nomem;				\
+		*(type *)(buf)->data = cvt(val);			\
+		(buf)->data += sizeof(type);				\
+	} while (0)
+
+#define WSM_PUT8(buf, val)  __WSM_PUT(buf, val, u8, (u8))
+#define WSM_PUT16(buf, val) __WSM_PUT(buf, val, u16, __cpu_to_le16)
+#define WSM_PUT32(buf, val) __WSM_PUT(buf, val, u32, __cpu_to_le32)
+
+static void wsm_buf_reset(struct wsm_buf *buf);
+static int wsm_buf_reserve(struct wsm_buf *buf, size_t extra_size);
+
+static int wsm_cmd_send(struct cw1200_common *priv,
+			struct wsm_buf *buf,
+			void *arg, u16 cmd, long tmo);
+
+#define wsm_cmd_lock(__priv) mutex_lock(&((__priv)->wsm_cmd_mux))
+#define wsm_cmd_unlock(__priv) mutex_unlock(&((__priv)->wsm_cmd_mux))
+
+/* ******************************************************************** */
+/* WSM API implementation						*/
+
+static int wsm_generic_confirm(struct cw1200_common *priv,
+			     void *arg,
+			     struct wsm_buf *buf)
+{
+	u32 status = WSM_GET32(buf);
+	if (status != WSM_STATUS_SUCCESS)
+		return -EINVAL;
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+int wsm_configuration(struct cw1200_common *priv, struct wsm_configuration *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT32(buf, arg->dot11MaxTransmitMsduLifeTime);
+	WSM_PUT32(buf, arg->dot11MaxReceiveLifeTime);
+	WSM_PUT32(buf, arg->dot11RtsThreshold);
+
+	/* DPD block. */
+	WSM_PUT16(buf, arg->dpdData_size + 12);
+	WSM_PUT16(buf, 1); /* DPD version */
+	WSM_PUT(buf, arg->dot11StationId, ETH_ALEN);
+	WSM_PUT16(buf, 5); /* DPD flags */
+	WSM_PUT(buf, arg->dpdData, arg->dpdData_size);
+
+	ret = wsm_cmd_send(priv, buf, arg,
+			   WSM_CONFIGURATION_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+static int wsm_configuration_confirm(struct cw1200_common *priv,
+				     struct wsm_configuration *arg,
+				     struct wsm_buf *buf)
+{
+	int i;
+	int status;
+
+	status = WSM_GET32(buf);
+	if (WARN_ON(status != WSM_STATUS_SUCCESS))
+		return -EINVAL;
+
+	WSM_GET(buf, arg->dot11StationId, ETH_ALEN);
+	arg->dot11FrequencyBandsSupported = WSM_GET8(buf);
+	WSM_SKIP(buf, 1);
+	arg->supportedRateMask = WSM_GET32(buf);
+	for (i = 0; i < 2; ++i) {
+		arg->txPowerRange[i].min_power_level = WSM_GET32(buf);
+		arg->txPowerRange[i].max_power_level = WSM_GET32(buf);
+		arg->txPowerRange[i].stepping = WSM_GET32(buf);
+	}
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+/* ******************************************************************** */
+
+int wsm_reset(struct cw1200_common *priv, const struct wsm_reset *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	u16 cmd = WSM_RESET_REQ_ID | WSM_TX_LINK_ID(arg->link_id);
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT32(buf, arg->reset_statistics ? 0 : 1);
+	ret = wsm_cmd_send(priv, buf, NULL, cmd, WSM_CMD_RESET_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+struct wsm_mib {
+	u16 mib_id;
+	void *buf;
+	size_t buf_size;
+};
+
+int wsm_read_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
+			size_t buf_size)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	struct wsm_mib mib_buf = {
+		.mib_id = mib_id,
+		.buf = _buf,
+		.buf_size = buf_size,
+	};
+	wsm_cmd_lock(priv);
+
+	WSM_PUT16(buf, mib_id);
+	WSM_PUT16(buf, 0);
+
+	ret = wsm_cmd_send(priv, buf, &mib_buf,
+			   WSM_READ_MIB_REQ_ID, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+static int wsm_read_mib_confirm(struct cw1200_common *priv,
+				struct wsm_mib *arg,
+				struct wsm_buf *buf)
+{
+	u16 size;
+	if (WARN_ON(WSM_GET32(buf) != WSM_STATUS_SUCCESS))
+		return -EINVAL;
+
+	if (WARN_ON(WSM_GET16(buf) != arg->mib_id))
+		return -EINVAL;
+
+	size = WSM_GET16(buf);
+	if (size > arg->buf_size)
+		size = arg->buf_size;
+
+	WSM_GET(buf, arg->buf, size);
+	arg->buf_size = size;
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+/* ******************************************************************** */
+
+int wsm_write_mib(struct cw1200_common *priv, u16 mib_id, void *_buf,
+			size_t buf_size)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	struct wsm_mib mib_buf = {
+		.mib_id = mib_id,
+		.buf = _buf,
+		.buf_size = buf_size,
+	};
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT16(buf, mib_id);
+	WSM_PUT16(buf, buf_size);
+	WSM_PUT(buf, _buf, buf_size);
+
+	ret = wsm_cmd_send(priv, buf, &mib_buf,
+			   WSM_WRITE_MIB_REQ_ID, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+static int wsm_write_mib_confirm(struct cw1200_common *priv,
+				struct wsm_mib *arg,
+				struct wsm_buf *buf)
+{
+	int ret;
+
+	ret = wsm_generic_confirm(priv, arg, buf);
+	if (ret)
+		return ret;
+
+	if (arg->mib_id == WSM_MIB_ID_OPERATIONAL_POWER_MODE) {
+		/* OperationalMode: update PM status. */
+		const char *p = arg->buf;
+		cw1200_enable_powersave(priv, (p[0] & 0x0F) ? true : false);
+	}
+	return 0;
+}
+
+/* ******************************************************************** */
+
+int wsm_scan(struct cw1200_common *priv, const struct wsm_scan *arg)
+{
+	int i;
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	if (arg->num_channels > 48)
+		return -EINVAL;
+
+	if (arg->num_ssids > 2)
+		return -EINVAL;
+
+	if (arg->band > 1)
+		return -EINVAL;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->band);
+	WSM_PUT8(buf, arg->type);
+	WSM_PUT8(buf, arg->flags);
+	WSM_PUT8(buf, arg->max_tx_rate);
+	WSM_PUT32(buf, arg->auto_scan_interval);
+	WSM_PUT8(buf, arg->num_probes);
+	WSM_PUT8(buf, arg->num_channels);
+	WSM_PUT8(buf, arg->num_ssids);
+	WSM_PUT8(buf, arg->probe_delay);
+
+	for (i = 0; i < arg->num_channels; ++i) {
+		WSM_PUT16(buf, arg->ch[i].number);
+		WSM_PUT16(buf, 0);
+		WSM_PUT32(buf, arg->ch[i].min_chan_time);
+		WSM_PUT32(buf, arg->ch[i].max_chan_time);
+		WSM_PUT32(buf, 0);
+	}
+
+	for (i = 0; i < arg->num_ssids; ++i) {
+		WSM_PUT32(buf, arg->ssids[i].length);
+		WSM_PUT(buf, &arg->ssids[i].ssid[0],
+			sizeof(arg->ssids[i].ssid));
+	}
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_START_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_stop_scan(struct cw1200_common *priv)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	wsm_cmd_lock(priv);
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_STOP_SCAN_REQ_ID, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+}
+
+
+static int wsm_tx_confirm(struct cw1200_common *priv,
+			  struct wsm_buf *buf,
+			  int link_id)
+{
+	struct wsm_tx_confirm tx_confirm;
+
+	tx_confirm.packet_id = WSM_GET32(buf);
+	tx_confirm.status = WSM_GET32(buf);
+	tx_confirm.tx_rate = WSM_GET8(buf);
+	tx_confirm.ack_failures = WSM_GET8(buf);
+	tx_confirm.flags = WSM_GET16(buf);
+	tx_confirm.media_delay = WSM_GET32(buf);
+	tx_confirm.tx_queue_delay = WSM_GET32(buf);
+
+	cw1200_tx_confirm_cb(priv, link_id, &tx_confirm);
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+static int wsm_multi_tx_confirm(struct cw1200_common *priv,
+				struct wsm_buf *buf, int link_id)
+{
+	int ret;
+	int count;
+	int i;
+
+	count = WSM_GET32(buf);
+	if (WARN_ON(count <= 0))
+		return -EINVAL;
+
+	if (count > 1) {
+		/* We already released one buffer, now for the rest */
+		ret = wsm_release_tx_buffer(priv, count - 1);
+		if (ret < 0)
+			return ret;
+		else if (ret > 0)
+			cw1200_bh_wakeup(priv);
+	}
+
+	cw1200_debug_txed_multi(priv, count);
+	for (i = 0; i < count; ++i) {
+		ret = wsm_tx_confirm(priv, buf, link_id);
+		if (ret)
+			return ret;
+	}
+	return ret;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+/* ******************************************************************** */
+
+static int wsm_join_confirm(struct cw1200_common *priv,
+			    struct wsm_join_cnf *arg,
+			    struct wsm_buf *buf)
+{
+	arg->status = WSM_GET32(buf);
+	if (WARN_ON(arg->status) != WSM_STATUS_SUCCESS)
+		return -EINVAL;
+
+	arg->min_power_level = WSM_GET32(buf);
+	arg->max_power_level = WSM_GET32(buf);
+
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+int wsm_join(struct cw1200_common *priv, struct wsm_join *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	struct wsm_join_cnf resp;
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->mode);
+	WSM_PUT8(buf, arg->band);
+	WSM_PUT16(buf, arg->channel_number);
+	WSM_PUT(buf, &arg->bssid[0], sizeof(arg->bssid));
+	WSM_PUT16(buf, arg->atim_window);
+	WSM_PUT8(buf, arg->preamble_type);
+	WSM_PUT8(buf, arg->probe_for_join);
+	WSM_PUT8(buf, arg->dtim_period);
+	WSM_PUT8(buf, arg->flags);
+	WSM_PUT32(buf, arg->ssid_len);
+	WSM_PUT(buf, &arg->ssid[0], sizeof(arg->ssid));
+	WSM_PUT32(buf, arg->beacon_interval);
+	WSM_PUT32(buf, arg->basic_rate_set);
+
+	priv->tx_burst_idx = -1;
+	ret = wsm_cmd_send(priv, buf, &resp,
+			   WSM_JOIN_REQ_ID, WSM_CMD_TIMEOUT);
+	/* TODO:  Update state based on resp.min|max_power_level */
+
+	priv->join_complete_status = resp.status;
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_set_bss_params(struct cw1200_common *priv,
+		       const struct wsm_set_bss_params *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, (arg->reset_beacon_loss ?  0x1 : 0));
+	WSM_PUT8(buf, arg->beacon_lost_count);
+	WSM_PUT16(buf, arg->aid);
+	WSM_PUT32(buf, arg->operational_rate_set);
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_SET_BSS_PARAMS_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_add_key(struct cw1200_common *priv, const struct wsm_add_key *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT(buf, arg, sizeof(*arg));
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_ADD_KEY_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_remove_key(struct cw1200_common *priv, const struct wsm_remove_key *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->index);
+	WSM_PUT8(buf, 0);
+	WSM_PUT16(buf, 0);
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_REMOVE_KEY_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_set_tx_queue_params(struct cw1200_common *priv,
+		const struct wsm_set_tx_queue_params *arg, u8 id)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	u8 queue_id_to_wmm_aci[] = {3, 2, 0, 1};
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, queue_id_to_wmm_aci[id]);
+	WSM_PUT8(buf, 0);
+	WSM_PUT8(buf, arg->ackPolicy);
+	WSM_PUT8(buf, 0);
+	WSM_PUT32(buf, arg->maxTransmitLifetime);
+	WSM_PUT16(buf, arg->allowedMediumTime);
+	WSM_PUT16(buf, 0);
+
+	ret = wsm_cmd_send(priv, buf, NULL, 0x0012, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_set_edca_params(struct cw1200_common *priv,
+				const struct wsm_edca_params *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	/* Implemented according to specification. */
+
+	WSM_PUT16(buf, arg->params[3].cwmin);
+	WSM_PUT16(buf, arg->params[2].cwmin);
+	WSM_PUT16(buf, arg->params[1].cwmin);
+	WSM_PUT16(buf, arg->params[0].cwmin);
+
+	WSM_PUT16(buf, arg->params[3].cwmax);
+	WSM_PUT16(buf, arg->params[2].cwmax);
+	WSM_PUT16(buf, arg->params[1].cwmax);
+	WSM_PUT16(buf, arg->params[0].cwmax);
+
+	WSM_PUT8(buf, arg->params[3].aifns);
+	WSM_PUT8(buf, arg->params[2].aifns);
+	WSM_PUT8(buf, arg->params[1].aifns);
+	WSM_PUT8(buf, arg->params[0].aifns);
+
+	WSM_PUT16(buf, arg->params[3].txop_limit);
+	WSM_PUT16(buf, arg->params[2].txop_limit);
+	WSM_PUT16(buf, arg->params[1].txop_limit);
+	WSM_PUT16(buf, arg->params[0].txop_limit);
+
+	WSM_PUT32(buf, arg->params[3].max_rx_lifetime);
+	WSM_PUT32(buf, arg->params[2].max_rx_lifetime);
+	WSM_PUT32(buf, arg->params[1].max_rx_lifetime);
+	WSM_PUT32(buf, arg->params[0].max_rx_lifetime);
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_EDCA_PARAMS_REQ_ID, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_switch_channel(struct cw1200_common *priv,
+			const struct wsm_switch_channel *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->mode);
+	WSM_PUT8(buf, arg->switch_count);
+	WSM_PUT16(buf, arg->channel_number);
+
+	priv->channel_switch_in_progress = 1;
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_SWITCH_CHANNEL_REQ_ID, WSM_CMD_TIMEOUT);
+	if (ret)
+		priv->channel_switch_in_progress = 0;
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	priv->ps_mode_switch_in_progress = 1;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->mode);
+	WSM_PUT8(buf, arg->fast_psm_idle_period);
+	WSM_PUT8(buf, arg->ap_psm_change_period);
+	WSM_PUT8(buf, arg->min_auto_pspoll_period);
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_SET_PM_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_start(struct cw1200_common *priv, const struct wsm_start *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT8(buf, arg->mode);
+	WSM_PUT8(buf, arg->band);
+	WSM_PUT16(buf, arg->channel_number);
+	WSM_PUT32(buf, arg->ct_window);
+	WSM_PUT32(buf, arg->beacon_interval);
+	WSM_PUT8(buf, arg->dtim_period);
+	WSM_PUT8(buf, arg->preamble);
+	WSM_PUT8(buf, arg->probe_delay);
+	WSM_PUT8(buf, arg->ssid_len);
+	WSM_PUT(buf, arg->ssid, sizeof(arg->ssid));
+	WSM_PUT32(buf, arg->basic_rate_set);
+
+	priv->tx_burst_idx = -1;
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_START_REQ_ID, WSM_CMD_START_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_beacon_transmit(struct cw1200_common *priv,
+			const struct wsm_beacon_transmit *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT32(buf, arg->enable_beaconing ? 1 : 0);
+
+	ret = wsm_cmd_send(priv, buf, NULL,
+			   WSM_BEACON_TRANSMIT_REQ_ID, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_start_find(struct cw1200_common *priv)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+	ret = wsm_cmd_send(priv, buf, NULL, 0x0019, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+}
+
+/* ******************************************************************** */
+
+int wsm_stop_find(struct cw1200_common *priv)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+	ret = wsm_cmd_send(priv, buf, NULL, 0x001A, WSM_CMD_TIMEOUT);
+	wsm_cmd_unlock(priv);
+	return ret;
+}
+
+/* ******************************************************************** */
+
+int wsm_map_link(struct cw1200_common *priv, const struct wsm_map_link *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	u16 cmd = 0x001C | WSM_TX_LINK_ID(arg->link_id);
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT(buf, &arg->mac_addr[0], sizeof(arg->mac_addr));
+	WSM_PUT16(buf, 0);
+
+	ret = wsm_cmd_send(priv, buf, NULL, cmd, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+
+int wsm_update_ie(struct cw1200_common *priv,
+		  const struct wsm_update_ie *arg)
+{
+	int ret;
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT16(buf, arg->what);
+	WSM_PUT16(buf, arg->count);
+	WSM_PUT(buf, arg->ies, arg->length);
+
+	ret = wsm_cmd_send(priv, buf, NULL, 0x001B, WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+
+/* ******************************************************************** */
+int wsm_set_probe_responder(struct cw1200_common *priv, bool enable)
+{
+	priv->rx_filter.probeResponder = enable;
+	return wsm_set_rx_filter(priv, &priv->rx_filter);
+}
+
+/* ******************************************************************** */
+/* WSM indication events implementation					*/
+const char * const cw1200_fw_types[] = {
+	"ETF",
+	"WFM",
+	"WSM",
+	"HI test",
+	"Platform test"
+};
+
+static int wsm_startup_indication(struct cw1200_common *priv,
+					struct wsm_buf *buf)
+{
+	priv->wsm_caps.input_buffers     = WSM_GET16(buf);
+	priv->wsm_caps.input_buffer_size = WSM_GET16(buf);
+	priv->wsm_caps.hw_id	  = WSM_GET16(buf);
+	priv->wsm_caps.hw_subid	  = WSM_GET16(buf);
+	priv->wsm_caps.status	  = WSM_GET16(buf);
+	priv->wsm_caps.fw_cap	  = WSM_GET16(buf);
+	priv->wsm_caps.fw_type	  = WSM_GET16(buf);
+	priv->wsm_caps.fw_api	  = WSM_GET16(buf);
+	priv->wsm_caps.fw_build   = WSM_GET16(buf);
+	priv->wsm_caps.fw_ver     = WSM_GET16(buf);
+	WSM_GET(buf, priv->wsm_caps.fw_label, sizeof(priv->wsm_caps.fw_label));
+	priv->wsm_caps.fw_label[sizeof(priv->wsm_caps.fw_label) - 1] = 0; /* Do not trust FW too much... */
+
+	if (WARN_ON(priv->wsm_caps.status))
+		return -EINVAL;
+
+	if (WARN_ON(priv->wsm_caps.fw_type > 4))
+		return -EINVAL;
+
+	pr_info("CW1200 WSM init done.\n"
+		"   Input buffers: %d x %d bytes\n"
+		"   Hardware: %d.%d\n"
+		"   %s firmware [%s], ver: %d, build: %d,"
+		"   api: %d, cap: 0x%.4X\n",
+		priv->wsm_caps.input_buffers,
+		priv->wsm_caps.input_buffer_size,
+		priv->wsm_caps.hw_id, priv->wsm_caps.hw_subid,
+		cw1200_fw_types[priv->wsm_caps.fw_type],
+		priv->wsm_caps.fw_label, priv->wsm_caps.fw_ver,
+		priv->wsm_caps.fw_build,
+		priv->wsm_caps.fw_api, priv->wsm_caps.fw_cap);
+
+	/* Disable unsupported frequency bands */
+	if (!(priv->wsm_caps.fw_cap & 0x1))
+		priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
+	if (!(priv->wsm_caps.fw_cap & 0x2))
+		priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
+
+	priv->firmware_ready = 1;
+	wake_up(&priv->wsm_startup_done);
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+static int wsm_receive_indication(struct cw1200_common *priv,
+				  int link_id,
+				  struct wsm_buf *buf,
+				  struct sk_buff **skb_p)
+{
+	struct wsm_rx rx;
+	struct ieee80211_hdr *hdr;
+	size_t hdr_len;
+	__le16 fctl;
+
+	rx.status = WSM_GET32(buf);
+	rx.channel_number = WSM_GET16(buf);
+	rx.rx_rate = WSM_GET8(buf);
+	rx.rcpi_rssi = WSM_GET8(buf);
+	rx.flags = WSM_GET32(buf);
+
+	/* FW Workaround: Drop probe resp or
+	   beacon when RSSI is 0
+	*/
+	hdr = (struct ieee80211_hdr *)(*skb_p)->data;
+
+	if (!rx.rcpi_rssi &&
+	    (ieee80211_is_probe_resp(hdr->frame_control) ||
+	     ieee80211_is_beacon(hdr->frame_control)))
+		return 0;
+
+	/* If no RSSI subscription has been made,
+	 * convert RCPI to RSSI here
+	 */
+	if (!priv->cqm_use_rssi)
+		rx.rcpi_rssi = rx.rcpi_rssi / 2 - 110;
+
+	fctl = *(__le16 *)buf->data;
+	hdr_len = buf->data - buf->begin;
+	skb_pull(*skb_p, hdr_len);
+	if (!rx.status && ieee80211_is_deauth(fctl)) {
+		if (priv->join_status == CW1200_JOIN_STATUS_STA) {
+			/* Shedule unjoin work */
+			pr_debug("[WSM] Issue unjoin command (RX).\n");
+			wsm_lock_tx_async(priv);
+			if (queue_work(priv->workqueue,
+				       &priv->unjoin_work) <= 0)
+				wsm_unlock_tx(priv);
+		}
+	}
+	cw1200_rx_cb(priv, &rx, link_id, skb_p);
+	if (*skb_p)
+		skb_push(*skb_p, hdr_len);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+static int wsm_event_indication(struct cw1200_common *priv, struct wsm_buf *buf)
+{
+	int first;
+	struct cw1200_wsm_event *event;
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
+		/* STA is stopped. */
+		return 0;
+	}
+
+	event = kzalloc(sizeof(struct cw1200_wsm_event), GFP_KERNEL);
+
+	event->evt.id = __le32_to_cpu(WSM_GET32(buf));
+	event->evt.data = __le32_to_cpu(WSM_GET32(buf));
+
+	pr_debug("[WSM] Event: %d(%d)\n",
+		 event->evt.id, event->evt.data);
+
+	spin_lock(&priv->event_queue_lock);
+	first = list_empty(&priv->event_queue);
+	list_add_tail(&event->link, &priv->event_queue);
+	spin_unlock(&priv->event_queue_lock);
+
+	if (first)
+		queue_work(priv->workqueue, &priv->event_handler);
+
+	return 0;
+
+underflow:
+	kfree(event);
+	return -EINVAL;
+}
+
+static int wsm_channel_switch_indication(struct cw1200_common *priv,
+					 struct wsm_buf *buf)
+{
+	WARN_ON(WSM_GET32(buf));
+
+	priv->channel_switch_in_progress = 0;
+	wake_up(&priv->channel_switch_done);
+
+	wsm_unlock_tx(priv);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+static int wsm_set_pm_indication(struct cw1200_common *priv,
+				 struct wsm_buf *buf)
+{
+	/* TODO:  Check buf (struct wsm_set_pm_complete) for validity */
+	if (priv->ps_mode_switch_in_progress) {
+		priv->ps_mode_switch_in_progress = 0;
+		wake_up(&priv->ps_mode_switch_done);
+	}
+	return 0;
+}
+
+static int wsm_scan_started(struct cw1200_common *priv, void *arg,
+			    struct wsm_buf *buf)
+{
+	u32 status = WSM_GET32(buf);
+	if (status != WSM_STATUS_SUCCESS) {
+		cw1200_scan_failed_cb(priv);
+		return -EINVAL;
+	}
+	return 0;
+
+underflow:
+	WARN_ON(1);
+	return -EINVAL;
+}
+
+static int wsm_scan_complete_indication(struct cw1200_common *priv,
+					struct wsm_buf *buf)
+{
+	struct wsm_scan_complete arg;
+	arg.status = WSM_GET32(buf);
+	arg.psm = WSM_GET8(buf);
+	arg.num_channels = WSM_GET8(buf);
+	cw1200_scan_complete_cb(priv, &arg);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+static int wsm_join_complete_indication(struct cw1200_common *priv,
+					struct wsm_buf *buf)
+{
+	struct wsm_join_complete arg;
+	arg.status = WSM_GET32(buf);
+	pr_debug("[WSM] Join complete indication, status: %d\n", arg.status);
+	cw1200_join_complete_cb(priv, &arg);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+static int wsm_find_complete_indication(struct cw1200_common *priv,
+					struct wsm_buf *buf)
+{
+	pr_warn("Implement find_complete_indication\n");
+	return 0;
+}
+
+static int wsm_ba_timeout_indication(struct cw1200_common *priv,
+				     struct wsm_buf *buf)
+{
+	u32 dummy;
+	u8 tid;
+	u8 dummy2;
+	u8 addr[ETH_ALEN];
+
+	dummy = WSM_GET32(buf);
+	tid = WSM_GET8(buf);
+	dummy2 = WSM_GET8(buf);
+	WSM_GET(buf, addr, ETH_ALEN);
+
+	pr_info("BlockACK timeout, tid %d, addr %pM\n",
+		tid, addr);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+static int wsm_suspend_resume_indication(struct cw1200_common *priv,
+					 int link_id, struct wsm_buf *buf)
+{
+	u32 flags;
+	struct wsm_suspend_resume arg;
+
+	flags = WSM_GET32(buf);
+	arg.link_id = link_id;
+	arg.stop = !(flags & 1);
+	arg.multicast = !!(flags & 8);
+	arg.queue = (flags >> 1) & 3;
+
+	cw1200_suspend_resume(priv, &arg);
+
+	return 0;
+
+underflow:
+	return -EINVAL;
+}
+
+
+/* ******************************************************************** */
+/* WSM TX								*/
+
+static int wsm_cmd_send(struct cw1200_common *priv,
+			struct wsm_buf *buf,
+			void *arg, u16 cmd, long tmo)
+{
+	size_t buf_len = buf->data - buf->begin;
+	int ret;
+
+	/* Don't bother if we're dead. */
+	if (priv->bh_error) {
+		ret = 0;
+		goto done;
+	}
+
+	/* Block until the cmd buffer is completed.  Tortuous. */
+	spin_lock(&priv->wsm_cmd.lock);
+	while (!priv->wsm_cmd.done) {
+		spin_unlock(&priv->wsm_cmd.lock);
+		spin_lock(&priv->wsm_cmd.lock);
+	}
+	priv->wsm_cmd.done = 0;
+	spin_unlock(&priv->wsm_cmd.lock);
+
+	if (cmd == WSM_WRITE_MIB_REQ_ID ||
+	    cmd == WSM_READ_MIB_REQ_ID)
+		pr_debug("[WSM] >>> 0x%.4X [MIB: 0x%.4X] (%zu)\n",
+			 cmd, __le16_to_cpu(((__le16 *)buf->begin)[2]),
+			 buf_len);
+	else
+		pr_debug("[WSM] >>> 0x%.4X (%zu)\n", cmd, buf_len);
+
+	/*
+	 * Due to buggy SPI on CW1200, we need to
+	 * pad the message by a few bytes to ensure
+	 * that it's completely received.
+	 */
+#ifdef CONFIG_CW1200_ETF
+	if (!etf_mode)
+#endif
+		buf_len += 4;
+
+	/* Fill HI message header */
+	/* BH will add sequence number */
+	((__le16 *)buf->begin)[0] = __cpu_to_le16(buf_len);
+	((__le16 *)buf->begin)[1] = __cpu_to_le16(cmd);
+
+	spin_lock(&priv->wsm_cmd.lock);
+	BUG_ON(priv->wsm_cmd.ptr);
+	priv->wsm_cmd.ptr = buf->begin;
+	priv->wsm_cmd.len = buf_len;
+	priv->wsm_cmd.arg = arg;
+	priv->wsm_cmd.cmd = cmd;
+	spin_unlock(&priv->wsm_cmd.lock);
+
+	cw1200_bh_wakeup(priv);
+
+	/* Wait for command completion */
+	ret = wait_event_timeout(priv->wsm_cmd_wq,
+				 priv->wsm_cmd.done, tmo);
+
+	if (!ret && !priv->wsm_cmd.done) {
+		spin_lock(&priv->wsm_cmd.lock);
+		priv->wsm_cmd.done = 1;
+		priv->wsm_cmd.ptr = NULL;
+		spin_unlock(&priv->wsm_cmd.lock);
+		if (priv->bh_error) {
+			/* Return ok to help system cleanup */
+			ret = 0;
+		} else {
+			pr_err("CMD req (0x%04x) stuck in firmware, killing BH\n", priv->wsm_cmd.cmd);
+			print_hex_dump_bytes("REQDUMP: ", DUMP_PREFIX_NONE,
+					     buf->begin, buf_len);
+			pr_err("Outstanding outgoing frames:  %d\n", priv->hw_bufs_used);
+
+			/* Kill BH thread to report the error to the top layer. */
+			atomic_add(1, &priv->bh_term);
+			wake_up(&priv->bh_wq);
+			ret = -ETIMEDOUT;
+		}
+	} else {
+		spin_lock(&priv->wsm_cmd.lock);
+		BUG_ON(!priv->wsm_cmd.done);
+		ret = priv->wsm_cmd.ret;
+		spin_unlock(&priv->wsm_cmd.lock);
+	}
+done:
+	wsm_buf_reset(buf);
+	return ret;
+}
+
+#ifdef CONFIG_CW1200_ETF
+int wsm_raw_cmd(struct cw1200_common *priv, u8 *data, size_t len)
+{
+	struct wsm_buf *buf = &priv->wsm_cmd_buf;
+	int ret;
+
+	u16 *cmd = (u16 *)(data + 2);
+
+	wsm_cmd_lock(priv);
+
+	WSM_PUT(buf, data + 4, len - 4);  /* Skip over header (u16+u16) */
+
+	ret = wsm_cmd_send(priv, buf, NULL, __le16_to_cpu(*cmd), WSM_CMD_TIMEOUT);
+
+	wsm_cmd_unlock(priv);
+	return ret;
+
+nomem:
+	wsm_cmd_unlock(priv);
+	return -ENOMEM;
+}
+#endif /* CONFIG_CW1200_ETF */
+
+/* ******************************************************************** */
+/* WSM TX port control							*/
+
+void wsm_lock_tx(struct cw1200_common *priv)
+{
+	wsm_cmd_lock(priv);
+	if (atomic_add_return(1, &priv->tx_lock) == 1) {
+		if (wsm_flush_tx(priv))
+			pr_debug("[WSM] TX is locked.\n");
+	}
+	wsm_cmd_unlock(priv);
+}
+
+void wsm_lock_tx_async(struct cw1200_common *priv)
+{
+	if (atomic_add_return(1, &priv->tx_lock) == 1)
+		pr_debug("[WSM] TX is locked (async).\n");
+}
+
+bool wsm_flush_tx(struct cw1200_common *priv)
+{
+	unsigned long timestamp = jiffies;
+	bool pending = false;
+	long timeout;
+	int i;
+
+	/* Flush must be called with TX lock held. */
+	BUG_ON(!atomic_read(&priv->tx_lock));
+
+	/* First check if we really need to do something.
+	 * It is safe to use unprotected access, as hw_bufs_used
+	 * can only decrements.
+	 */
+	if (!priv->hw_bufs_used)
+		return true;
+
+	if (priv->bh_error) {
+		/* In case of failure do not wait for magic. */
+		pr_err("[WSM] Fatal error occured, will not flush TX.\n");
+		return false;
+	} else {
+		/* Get a timestamp of "oldest" frame */
+		for (i = 0; i < 4; ++i)
+			pending |= cw1200_queue_get_xmit_timestamp(
+					&priv->tx_queue[i],
+					&timestamp, 0xffffffff);
+		/* If there's nothing pending, we're good */
+		if (!pending)
+			return true;
+
+		timeout = timestamp + WSM_CMD_LAST_CHANCE_TIMEOUT - jiffies;
+		if (timeout < 0 || wait_event_timeout(priv->bh_evt_wq,
+						      !priv->hw_bufs_used,
+						      timeout) <= 0) {
+			/* Hmmm... Not good. Frame had stuck in firmware. */
+			priv->bh_error = 1;
+			wiphy_err(priv->hw->wiphy, "[WSM] TX Frames (%d) stuck in firmware, killing BH\n", priv->hw_bufs_used);
+			wake_up(&priv->bh_wq);
+			return false;
+		}
+
+		/* Ok, everything is flushed. */
+		return true;
+	}
+}
+
+void wsm_unlock_tx(struct cw1200_common *priv)
+{
+	int tx_lock;
+	tx_lock = atomic_sub_return(1, &priv->tx_lock);
+	BUG_ON(tx_lock < 0);
+
+	if (tx_lock == 0) {
+		if (!priv->bh_error)
+			cw1200_bh_wakeup(priv);
+		pr_debug("[WSM] TX is unlocked.\n");
+	}
+}
+
+/* ******************************************************************** */
+/* WSM RX								*/
+
+int wsm_handle_exception(struct cw1200_common *priv, u8 *data, size_t len)
+{
+	struct wsm_buf buf;
+	u32 reason;
+	u32 reg[18];
+	char fname[48];
+	unsigned int i;
+
+	static const char * const reason_str[] = {
+		"undefined instruction",
+		"prefetch abort",
+		"data abort",
+		"unknown error",
+	};
+
+	buf.begin = buf.data = data;
+	buf.end = &buf.begin[len];
+
+	reason = WSM_GET32(&buf);
+	for (i = 0; i < ARRAY_SIZE(reg); ++i)
+		reg[i] = WSM_GET32(&buf);
+	WSM_GET(&buf, fname, sizeof(fname));
+
+	if (reason < 4)
+		wiphy_err(priv->hw->wiphy,
+			  "Firmware exception: %s.\n",
+			  reason_str[reason]);
+	else
+		wiphy_err(priv->hw->wiphy,
+			  "Firmware assert at %.*s, line %d\n",
+			  (int) sizeof(fname), fname, reg[1]);
+
+	for (i = 0; i < 12; i += 4)
+		wiphy_err(priv->hw->wiphy,
+			  "R%d: 0x%.8X, R%d: 0x%.8X, R%d: 0x%.8X, R%d: 0x%.8X,\n",
+			  i + 0, reg[i + 0], i + 1, reg[i + 1],
+			  i + 2, reg[i + 2], i + 3, reg[i + 3]);
+	wiphy_err(priv->hw->wiphy,
+		  "R12: 0x%.8X, SP: 0x%.8X, LR: 0x%.8X, PC: 0x%.8X,\n",
+		  reg[i + 0], reg[i + 1], reg[i + 2], reg[i + 3]);
+	i += 4;
+	wiphy_err(priv->hw->wiphy,
+		  "CPSR: 0x%.8X, SPSR: 0x%.8X\n",
+		  reg[i + 0], reg[i + 1]);
+
+	print_hex_dump_bytes("R1: ", DUMP_PREFIX_NONE,
+			     fname, sizeof(fname));
+	return 0;
+
+underflow:
+	wiphy_err(priv->hw->wiphy, "Firmware exception.\n");
+	print_hex_dump_bytes("Exception: ", DUMP_PREFIX_NONE,
+			     data, len);
+	return -EINVAL;
+}
+
+int wsm_handle_rx(struct cw1200_common *priv, u16 id,
+		  struct wsm_hdr *wsm, struct sk_buff **skb_p)
+{
+	int ret = 0;
+	struct wsm_buf wsm_buf;
+	int link_id = (id >> 6) & 0x0F;
+
+	/* Strip link id. */
+	id &= ~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX);
+
+	wsm_buf.begin = (u8 *)&wsm[0];
+	wsm_buf.data = (u8 *)&wsm[1];
+	wsm_buf.end = &wsm_buf.begin[__le32_to_cpu(wsm->len)];
+
+	pr_debug("[WSM] <<< 0x%.4X (%td)\n", id,
+		 wsm_buf.end - wsm_buf.begin);
+
+#ifdef CONFIG_CW1200_ETF
+	if (etf_mode) {
+		struct sk_buff *skb = alloc_skb(wsm_buf.end - wsm_buf.begin, GFP_KERNEL);
+
+		/* Strip out Sequence num before passing up */
+		wsm->id = __le16_to_cpu(wsm->id);
+		wsm->id &= 0x0FFF;
+		wsm->id = __cpu_to_le16(wsm->id);
+
+		memcpy(skb_put(skb, wsm_buf.end - wsm_buf.begin),
+		       wsm_buf.begin,
+		       wsm_buf.end - wsm_buf.begin);
+		skb_queue_tail(&priv->etf_q, skb);
+
+		/* Special case for startup */
+		if (id == WSM_STARTUP_IND_ID) {
+			wsm_startup_indication(priv, &wsm_buf);
+		} else if (id & 0x0400) {
+			spin_lock(&priv->wsm_cmd.lock);
+			priv->wsm_cmd.done = 1;
+			spin_unlock(&priv->wsm_cmd.lock);
+			wake_up(&priv->wsm_cmd_wq);
+		}
+
+		goto out;
+	}
+#endif
+
+	if (id == WSM_TX_CONFIRM_IND_ID) {
+		ret = wsm_tx_confirm(priv, &wsm_buf, link_id);
+	} else if (id == WSM_MULTI_TX_CONFIRM_ID) {
+		ret = wsm_multi_tx_confirm(priv, &wsm_buf, link_id);
+	} else if (id & 0x0400) {
+		void *wsm_arg;
+		u16 wsm_cmd;
+
+		/* Do not trust FW too much. Protection against repeated
+		 * response and race condition removal (see above).
+		 */
+		spin_lock(&priv->wsm_cmd.lock);
+		wsm_arg = priv->wsm_cmd.arg;
+		wsm_cmd = priv->wsm_cmd.cmd &
+				~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX);
+		priv->wsm_cmd.cmd = 0xFFFF;
+		spin_unlock(&priv->wsm_cmd.lock);
+
+		if (WARN_ON((id & ~0x0400) != wsm_cmd)) {
+			/* Note that any non-zero is a fatal retcode. */
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* Note that wsm_arg can be NULL in case of timeout in
+		 * wsm_cmd_send().
+		 */
+
+		switch (id) {
+		case WSM_READ_MIB_RESP_ID:
+			if (wsm_arg)
+				ret = wsm_read_mib_confirm(priv, wsm_arg,
+								&wsm_buf);
+			break;
+		case WSM_WRITE_MIB_RESP_ID:
+			if (wsm_arg)
+				ret = wsm_write_mib_confirm(priv, wsm_arg,
+							    &wsm_buf);
+			break;
+		case WSM_START_SCAN_RESP_ID:
+			if (wsm_arg)
+				ret = wsm_scan_started(priv, wsm_arg, &wsm_buf);
+			break;
+		case WSM_CONFIGURATION_RESP_ID:
+			if (wsm_arg)
+				ret = wsm_configuration_confirm(priv, wsm_arg,
+								&wsm_buf);
+			break;
+		case WSM_JOIN_RESP_ID:
+			if (wsm_arg)
+				ret = wsm_join_confirm(priv, wsm_arg, &wsm_buf);
+			break;
+		case WSM_STOP_SCAN_RESP_ID:
+		case WSM_RESET_RESP_ID:
+		case WSM_ADD_KEY_RESP_ID:
+		case WSM_REMOVE_KEY_RESP_ID:
+		case WSM_SET_PM_RESP_ID:
+		case WSM_SET_BSS_PARAMS_RESP_ID:
+		case 0x0412: /* set_tx_queue_params */
+		case WSM_EDCA_PARAMS_RESP_ID:
+		case WSM_SWITCH_CHANNEL_RESP_ID:
+		case WSM_START_RESP_ID:
+		case WSM_BEACON_TRANSMIT_RESP_ID:
+		case 0x0419: /* start_find */
+		case 0x041A: /* stop_find */
+		case 0x041B: /* update_ie */
+		case 0x041C: /* map_link */
+			WARN_ON(wsm_arg != NULL);
+			ret = wsm_generic_confirm(priv, wsm_arg, &wsm_buf);
+			if (ret) {
+				wiphy_warn(priv->hw->wiphy,
+					   "wsm_generic_confirm failed for request 0x%04x.\n",
+					   id & ~0x0400);
+
+				/* often 0x407 and 0x410 occur, this means we're dead.. */
+				if (priv->join_status >= CW1200_JOIN_STATUS_JOINING) {
+					wsm_lock_tx(priv);
+					if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
+						wsm_unlock_tx(priv);
+				}
+			}
+			break;
+		default:
+			wiphy_warn(priv->hw->wiphy,
+				   "Unrecognized confirmation 0x%04x\n",
+				   id & ~0x0400);
+		}
+
+		spin_lock(&priv->wsm_cmd.lock);
+		priv->wsm_cmd.ret = ret;
+		priv->wsm_cmd.done = 1;
+		spin_unlock(&priv->wsm_cmd.lock);
+
+		ret = 0; /* Error response from device should ne stop BH. */
+
+		wake_up(&priv->wsm_cmd_wq);
+	} else if (id & 0x0800) {
+		switch (id) {
+		case WSM_STARTUP_IND_ID:
+			ret = wsm_startup_indication(priv, &wsm_buf);
+			break;
+		case WSM_RECEIVE_IND_ID:
+			ret = wsm_receive_indication(priv, link_id,
+						     &wsm_buf, skb_p);
+			break;
+		case 0x0805:
+			ret = wsm_event_indication(priv, &wsm_buf);
+			break;
+		case WSM_SCAN_COMPLETE_IND_ID:
+			ret = wsm_scan_complete_indication(priv, &wsm_buf);
+			break;
+		case 0x0808:
+			ret = wsm_ba_timeout_indication(priv, &wsm_buf);
+			break;
+		case 0x0809:
+			ret = wsm_set_pm_indication(priv, &wsm_buf);
+			break;
+		case 0x080A:
+			ret = wsm_channel_switch_indication(priv, &wsm_buf);
+			break;
+		case 0x080B:
+			ret = wsm_find_complete_indication(priv, &wsm_buf);
+			break;
+		case 0x080C:
+			ret = wsm_suspend_resume_indication(priv,
+					link_id, &wsm_buf);
+			break;
+		case 0x080F:
+			ret = wsm_join_complete_indication(priv, &wsm_buf);
+			break;
+		default:
+			pr_warn("Unrecognised WSM ID %04x\n", id);
+		}
+	} else {
+		WARN_ON(1);
+		ret = -EINVAL;
+	}
+out:
+	return ret;
+}
+
+static bool wsm_handle_tx_data(struct cw1200_common *priv,
+			       struct wsm_tx *wsm,
+			       const struct ieee80211_tx_info *tx_info,
+			       const struct cw1200_txpriv *txpriv,
+			       struct cw1200_queue *queue)
+{
+	bool handled = false;
+	const struct ieee80211_hdr *frame =
+		(struct ieee80211_hdr *)&((u8 *)wsm)[txpriv->offset];
+	__le16 fctl = frame->frame_control;
+	enum {
+		do_probe,
+		do_drop,
+		do_wep,
+		do_tx,
+	} action = do_tx;
+
+	switch (priv->mode) {
+	case NL80211_IFTYPE_STATION:
+		if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
+			action = do_tx;
+		else if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA)
+			action = do_drop;
+		break;
+	case NL80211_IFTYPE_AP:
+		if (!priv->join_status) {
+			action = do_drop;
+		} else if (!(BIT(txpriv->raw_link_id) &
+			     (BIT(0) | priv->link_id_map))) {
+			wiphy_warn(priv->hw->wiphy,
+				   "A frame with expired link id is dropped.\n");
+			action = do_drop;
+		}
+		if (cw1200_queue_get_generation(wsm->packet_id) >
+				CW1200_MAX_REQUEUE_ATTEMPTS) {
+			/* HACK!!! WSM324 firmware has tendency to requeue
+			 * multicast frames in a loop, causing performance
+			 * drop and high power consumption of the driver.
+			 * In this situation it is better just to drop
+			 * the problematic frame.
+			 */
+			wiphy_warn(priv->hw->wiphy,
+				   "Too many attempts to requeue a frame; dropped.\n");
+			action = do_drop;
+		}
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		if (priv->join_status != CW1200_JOIN_STATUS_IBSS)
+			action = do_drop;
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		action = do_tx; /* TODO:  Test me! */
+		break;
+	case NL80211_IFTYPE_MONITOR:
+	default:
+		action = do_drop;
+		break;
+	}
+
+	if (action == do_tx) {
+		if (ieee80211_is_nullfunc(fctl)) {
+			spin_lock(&priv->bss_loss_lock);
+			if (priv->bss_loss_state) {
+				priv->bss_loss_confirm_id = wsm->packet_id;
+				wsm->queue_id = WSM_QUEUE_VOICE;
+			}
+			spin_unlock(&priv->bss_loss_lock);
+		} else if (ieee80211_is_probe_req(fctl)) {
+			action = do_probe;
+		} else if (ieee80211_is_deauth(fctl) &&
+			   priv->mode != NL80211_IFTYPE_AP) {
+			pr_debug("[WSM] Issue unjoin command due to tx deauth.\n");
+			wsm_lock_tx_async(priv);
+			if (queue_work(priv->workqueue,
+				       &priv->unjoin_work) <= 0)
+				wsm_unlock_tx(priv);
+		} else if (ieee80211_has_protected(fctl) &&
+			   tx_info->control.hw_key &&
+			   tx_info->control.hw_key->keyidx != priv->wep_default_key_id &&
+			   (tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
+			    tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_WEP104)) {
+			action = do_wep;
+		}
+	}
+
+	switch (action) {
+	case do_probe:
+		/* An interesting FW "feature". Device filters probe responses.
+		 * The easiest way to get it back is to convert
+		 * probe request into WSM start_scan command.
+		 */
+		pr_debug("[WSM] Convert probe request to scan.\n");
+		wsm_lock_tx_async(priv);
+		priv->pending_frame_id = __le32_to_cpu(wsm->packet_id);
+		if (queue_delayed_work(priv->workqueue,
+				       &priv->scan.probe_work, 0) <= 0)
+			wsm_unlock_tx(priv);
+		handled = true;
+		break;
+	case do_drop:
+		pr_debug("[WSM] Drop frame (0x%.4X).\n", fctl);
+		BUG_ON(cw1200_queue_remove(queue,
+					   __le32_to_cpu(wsm->packet_id)));
+		handled = true;
+		break;
+	case do_wep:
+		pr_debug("[WSM] Issue set_default_wep_key.\n");
+		wsm_lock_tx_async(priv);
+		priv->wep_default_key_id = tx_info->control.hw_key->keyidx;
+		priv->pending_frame_id = __le32_to_cpu(wsm->packet_id);
+		if (queue_work(priv->workqueue, &priv->wep_key_work) <= 0)
+			wsm_unlock_tx(priv);
+		handled = true;
+		break;
+	case do_tx:
+		pr_debug("[WSM] Transmit frame.\n");
+		break;
+	default:
+		/* Do nothing */
+		break;
+	}
+	return handled;
+}
+
+static int cw1200_get_prio_queue(struct cw1200_common *priv,
+				 u32 link_id_map, int *total)
+{
+	static const int urgent = BIT(CW1200_LINK_ID_AFTER_DTIM) |
+		BIT(CW1200_LINK_ID_UAPSD);
+	struct wsm_edca_queue_params *edca;
+	unsigned score, best = -1;
+	int winner = -1;
+	int queued;
+	int i;
+
+	/* search for a winner using edca params */
+	for (i = 0; i < 4; ++i) {
+		queued = cw1200_queue_get_num_queued(&priv->tx_queue[i],
+				link_id_map);
+		if (!queued)
+			continue;
+		*total += queued;
+		edca = &priv->edca.params[i];
+		score = ((edca->aifns + edca->cwmin) << 16) +
+			((edca->cwmax - edca->cwmin) *
+			 (get_random_int() & 0xFFFF));
+		if (score < best && (winner < 0 || i != 3)) {
+			best = score;
+			winner = i;
+		}
+	}
+
+	/* override winner if bursting */
+	if (winner >= 0 && priv->tx_burst_idx >= 0 &&
+	    winner != priv->tx_burst_idx &&
+	    !cw1200_queue_get_num_queued(
+		    &priv->tx_queue[winner],
+		    link_id_map & urgent) &&
+	    cw1200_queue_get_num_queued(
+		    &priv->tx_queue[priv->tx_burst_idx],
+		    link_id_map))
+		winner = priv->tx_burst_idx;
+
+	return winner;
+}
+
+static int wsm_get_tx_queue_and_mask(struct cw1200_common *priv,
+				     struct cw1200_queue **queue_p,
+				     u32 *tx_allowed_mask_p,
+				     bool *more)
+{
+	int idx;
+	u32 tx_allowed_mask;
+	int total = 0;
+
+	/* Search for a queue with multicast frames buffered */
+	if (priv->tx_multicast) {
+		tx_allowed_mask = BIT(CW1200_LINK_ID_AFTER_DTIM);
+		idx = cw1200_get_prio_queue(priv,
+				tx_allowed_mask, &total);
+		if (idx >= 0) {
+			*more = total > 1;
+			goto found;
+		}
+	}
+
+	/* Search for unicast traffic */
+	tx_allowed_mask = ~priv->sta_asleep_mask;
+	tx_allowed_mask |= BIT(CW1200_LINK_ID_UAPSD);
+	if (priv->sta_asleep_mask) {
+		tx_allowed_mask |= priv->pspoll_mask;
+		tx_allowed_mask &= ~BIT(CW1200_LINK_ID_AFTER_DTIM);
+	} else {
+		tx_allowed_mask |= BIT(CW1200_LINK_ID_AFTER_DTIM);
+	}
+	idx = cw1200_get_prio_queue(priv,
+			tx_allowed_mask, &total);
+	if (idx < 0)
+		return -ENOENT;
+
+found:
+	*queue_p = &priv->tx_queue[idx];
+	*tx_allowed_mask_p = tx_allowed_mask;
+	return 0;
+}
+
+int wsm_get_tx(struct cw1200_common *priv, u8 **data,
+	       size_t *tx_len, int *burst)
+{
+	struct wsm_tx *wsm = NULL;
+	struct ieee80211_tx_info *tx_info;
+	struct cw1200_queue *queue = NULL;
+	int queue_num;
+	u32 tx_allowed_mask = 0;
+	const struct cw1200_txpriv *txpriv = NULL;
+	int count = 0;
+
+	/* More is used only for broadcasts. */
+	bool more = false;
+
+#ifdef CONFIG_CW1200_ITP
+	count = cw1200_itp_get_tx(priv, data, tx_len, burst);
+	if (count)
+		return count;
+#endif
+
+	if (priv->wsm_cmd.ptr) { /* CMD request */
+		++count;
+		spin_lock(&priv->wsm_cmd.lock);
+		BUG_ON(!priv->wsm_cmd.ptr);
+		*data = priv->wsm_cmd.ptr;
+		*tx_len = priv->wsm_cmd.len;
+		*burst = 1;
+		spin_unlock(&priv->wsm_cmd.lock);
+	} else {
+		for (;;) {
+			int ret;
+
+			if (atomic_add_return(0, &priv->tx_lock))
+				break;
+
+			spin_lock_bh(&priv->ps_state_lock);
+
+			ret = wsm_get_tx_queue_and_mask(priv, &queue,
+							&tx_allowed_mask, &more);
+			queue_num = queue - priv->tx_queue;
+
+			if (priv->buffered_multicasts &&
+			    (ret || !more) &&
+			    (priv->tx_multicast || !priv->sta_asleep_mask)) {
+				priv->buffered_multicasts = false;
+				if (priv->tx_multicast) {
+					priv->tx_multicast = false;
+					queue_work(priv->workqueue,
+						   &priv->multicast_stop_work);
+				}
+			}
+
+			spin_unlock_bh(&priv->ps_state_lock);
+
+			if (ret)
+				break;
+
+			if (cw1200_queue_get(queue,
+					     tx_allowed_mask,
+					     &wsm, &tx_info, &txpriv))
+				continue;
+
+			if (wsm_handle_tx_data(priv, wsm,
+					       tx_info, txpriv, queue))
+				continue;  /* Handled by WSM */
+
+			wsm->hdr.id &= __cpu_to_le16(
+				~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX));
+			wsm->hdr.id |= cpu_to_le16(
+				WSM_TX_LINK_ID(txpriv->raw_link_id));
+			priv->pspoll_mask &= ~BIT(txpriv->raw_link_id);
+
+			*data = (u8 *)wsm;
+			*tx_len = __le16_to_cpu(wsm->hdr.len);
+
+			/* allow bursting if txop is set */
+			if (priv->edca.params[queue_num].txop_limit)
+				*burst = min(*burst,
+					     (int)cw1200_queue_get_num_queued(queue, tx_allowed_mask) + 1);
+			else
+				*burst = 1;
+
+			/* store index of bursting queue */
+			if (*burst > 1)
+				priv->tx_burst_idx = queue_num;
+			else
+				priv->tx_burst_idx = -1;
+
+			if (more) {
+				struct ieee80211_hdr *hdr =
+					(struct ieee80211_hdr *)
+					&((u8 *)wsm)[txpriv->offset];
+				/* more buffered multicast/broadcast frames
+				 *  ==> set MoreData flag in IEEE 802.11 header
+				 *  to inform PS STAs
+				 */
+				hdr->frame_control |=
+					cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+			}
+
+			pr_debug("[WSM] >>> 0x%.4X (%zu) %p %c\n",
+				 0x0004, *tx_len, *data,
+				 wsm->more ? 'M' : ' ');
+			++count;
+			break;
+		}
+	}
+
+	return count;
+}
+
+void wsm_txed(struct cw1200_common *priv, u8 *data)
+{
+	if (data == priv->wsm_cmd.ptr) {
+		spin_lock(&priv->wsm_cmd.lock);
+		priv->wsm_cmd.ptr = NULL;
+		spin_unlock(&priv->wsm_cmd.lock);
+	}
+}
+
+/* ******************************************************************** */
+/* WSM buffer								*/
+
+void wsm_buf_init(struct wsm_buf *buf)
+{
+	BUG_ON(buf->begin);
+	buf->begin = kmalloc(FWLOAD_BLOCK_SIZE, GFP_KERNEL | GFP_DMA);
+	buf->end = buf->begin ? &buf->begin[FWLOAD_BLOCK_SIZE] : buf->begin;
+	wsm_buf_reset(buf);
+}
+
+void wsm_buf_deinit(struct wsm_buf *buf)
+{
+	kfree(buf->begin);
+	buf->begin = buf->data = buf->end = NULL;
+}
+
+static void wsm_buf_reset(struct wsm_buf *buf)
+{
+	if (buf->begin) {
+		buf->data = &buf->begin[4];
+		*(u32 *)buf->begin = 0;
+	} else {
+		buf->data = buf->begin;
+	}
+}
+
+static int wsm_buf_reserve(struct wsm_buf *buf, size_t extra_size)
+{
+	size_t pos = buf->data - buf->begin;
+	size_t size = pos + extra_size;
+
+	size = round_up(size, FWLOAD_BLOCK_SIZE);
+
+	buf->begin = krealloc(buf->begin, size, GFP_KERNEL | GFP_DMA);
+	if (buf->begin) {
+		buf->data = &buf->begin[pos];
+		buf->end = &buf->begin[size];
+		return 0;
+	} else {
+		buf->end = buf->data = buf->begin;
+		return -ENOMEM;
+	}
+}

drivers/net/wireless/cw1200/wsm.h

+/*
+ * WSM host interface (HI) interface for ST-Ericsson CW1200 mac80211 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * Based on CW1200 UMAC WSM API, which is
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Stewart Mathers <stewart.mathers@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_WSM_H_INCLUDED
+#define CW1200_WSM_H_INCLUDED
+
+#include <linux/spinlock.h>
+
+struct cw1200_common;
+
+/* Bands */
+/* Radio band 2.412 -2.484 GHz. */
+#define WSM_PHY_BAND_2_4G		(0)
+
+/* Radio band 4.9375-5.8250 GHz. */
+#define WSM_PHY_BAND_5G			(1)
+
+/* Transmit rates */
+/* 1   Mbps            ERP-DSSS */
+#define WSM_TRANSMIT_RATE_1		(0)
+
+/* 2   Mbps            ERP-DSSS */
+#define WSM_TRANSMIT_RATE_2		(1)
+
+/* 5.5 Mbps            ERP-CCK */
+#define WSM_TRANSMIT_RATE_5		(2)
+
+/* 11  Mbps            ERP-CCK */
+#define WSM_TRANSMIT_RATE_11		(3)
+
+/* 22  Mbps            ERP-PBCC (Not supported) */
+/* #define WSM_TRANSMIT_RATE_22		(4) */
+
+/* 33  Mbps            ERP-PBCC (Not supported) */
+/* #define WSM_TRANSMIT_RATE_33		(5) */
+
+/* 6   Mbps   (3 Mbps) ERP-OFDM, BPSK coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_6		(6)
+
+/* 9   Mbps (4.5 Mbps) ERP-OFDM, BPSK coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_9		(7)
+
+/* 12  Mbps  (6 Mbps)  ERP-OFDM, QPSK coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_12		(8)
+
+/* 18  Mbps  (9 Mbps)  ERP-OFDM, QPSK coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_18		(9)
+
+/* 24  Mbps (12 Mbps)  ERP-OFDM, 16QAM coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_24		(10)
+
+/* 36  Mbps (18 Mbps)  ERP-OFDM, 16QAM coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_36		(11)
+
+/* 48  Mbps (24 Mbps)  ERP-OFDM, 64QAM coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_48		(12)
+
+/* 54  Mbps (27 Mbps)  ERP-OFDM, 64QAM coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_54		(13)
+
+/* 6.5 Mbps            HT-OFDM, BPSK coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_HT_6		(14)
+
+/* 13  Mbps            HT-OFDM, QPSK coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_HT_13		(15)
+
+/* 19.5 Mbps           HT-OFDM, QPSK coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_HT_19		(16)
+
+/* 26  Mbps            HT-OFDM, 16QAM coding rate 1/2 */
+#define WSM_TRANSMIT_RATE_HT_26		(17)
+
+/* 39  Mbps            HT-OFDM, 16QAM coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_HT_39		(18)
+
+/* 52  Mbps            HT-OFDM, 64QAM coding rate 2/3 */
+#define WSM_TRANSMIT_RATE_HT_52		(19)
+
+/* 58.5 Mbps           HT-OFDM, 64QAM coding rate 3/4 */
+#define WSM_TRANSMIT_RATE_HT_58		(20)
+
+/* 65  Mbps            HT-OFDM, 64QAM coding rate 5/6 */
+#define WSM_TRANSMIT_RATE_HT_65		(21)
+
+/* Scan types */
+/* Foreground scan */
+#define WSM_SCAN_TYPE_FOREGROUND	(0)
+
+/* Background scan */
+#define WSM_SCAN_TYPE_BACKGROUND	(1)
+
+/* Auto scan */
+#define WSM_SCAN_TYPE_AUTO		(2)
+
+/* Scan flags */
+/* Forced background scan means if the station cannot */
+/* enter the power-save mode, it shall force to perform a */
+/* background scan. Only valid when ScanType is */
+/* background scan. */
+#define WSM_SCAN_FLAG_FORCE_BACKGROUND	(BIT(0))
+
+/* The WLAN device scans one channel at a time so */
+/* that disturbance to the data traffic is minimized. */
+#define WSM_SCAN_FLAG_SPLIT_METHOD	(BIT(1))
+
+/* Preamble Type. Long if not set. */
+#define WSM_SCAN_FLAG_SHORT_PREAMBLE	(BIT(2))
+
+/* 11n Tx Mode. Mixed if not set. */
+#define WSM_SCAN_FLAG_11N_GREENFIELD	(BIT(3))
+
+/* Scan constraints */
+/* Maximum number of channels to be scanned. */
+#define WSM_SCAN_MAX_NUM_OF_CHANNELS	(48)
+
+/* The maximum number of SSIDs that the device can scan for. */
+#define WSM_SCAN_MAX_NUM_OF_SSIDS	(2)
+
+/* Power management modes */
+/* 802.11 Active mode */
+#define WSM_PSM_ACTIVE			(0)
+
+/* 802.11 PS mode */
+#define WSM_PSM_PS			BIT(0)
+
+/* Fast Power Save bit */
+#define WSM_PSM_FAST_PS_FLAG		BIT(7)
+
+/* Dynamic aka Fast power save */
+#define WSM_PSM_FAST_PS			(BIT(0) | BIT(7))
+
+/* Undetermined */
+/* Note : Undetermined status is reported when the */
+/* NULL data frame used to advertise the PM mode to */
+/* the AP at Pre or Post Background Scan is not Acknowledged */
+#define WSM_PSM_UNKNOWN			BIT(1)
+
+/* Queue IDs */
+/* best effort/legacy */
+#define WSM_QUEUE_BEST_EFFORT		(0)
+
+/* background */
+#define WSM_QUEUE_BACKGROUND		(1)
+
+/* video */
+#define WSM_QUEUE_VIDEO			(2)
+
+/* voice */
+#define WSM_QUEUE_VOICE			(3)
+
+/* HT TX parameters */
+/* Non-HT */
+#define WSM_HT_TX_NON_HT		(0)
+
+/* Mixed format */
+#define WSM_HT_TX_MIXED			(1)
+
+/* Greenfield format */
+#define WSM_HT_TX_GREENFIELD		(2)
+
+/* STBC allowed */
+#define WSM_HT_TX_STBC			(BIT(7))
+
+/* EPTA prioirty flags for BT Coex */
+/* default epta priority */
+#define WSM_EPTA_PRIORITY_DEFAULT	4
+/* use for normal data */
+#define WSM_EPTA_PRIORITY_DATA		4
+/* use for connect/disconnect/roaming*/
+#define WSM_EPTA_PRIORITY_MGT		5
+/* use for action frames */
+#define WSM_EPTA_PRIORITY_ACTION	5
+/* use for AC_VI data */
+#define WSM_EPTA_PRIORITY_VIDEO		5
+/* use for AC_VO data */
+#define WSM_EPTA_PRIORITY_VOICE		6
+/* use for EAPOL exchange */
+#define WSM_EPTA_PRIORITY_EAPOL		7
+
+/* TX status */
+/* Frame was sent aggregated */
+/* Only valid for WSM_SUCCESS status. */
+#define WSM_TX_STATUS_AGGREGATION	(BIT(0))
+
+/* Host should requeue this frame later. */
+/* Valid only when status is WSM_REQUEUE. */
+#define WSM_TX_STATUS_REQUEUE		(BIT(1))
+
+/* Normal Ack */
+#define WSM_TX_STATUS_NORMAL_ACK	(0<<2)
+
+/* No Ack */
+#define WSM_TX_STATUS_NO_ACK		(1<<2)
+
+/* No explicit acknowledgement */
+#define WSM_TX_STATUS_NO_EXPLICIT_ACK	(2<<2)
+
+/* Block Ack */
+/* Only valid for WSM_SUCCESS status. */
+#define WSM_TX_STATUS_BLOCK_ACK		(3<<2)
+
+/* RX status */
+/* Unencrypted */
+#define WSM_RX_STATUS_UNENCRYPTED	(0<<0)
+
+/* WEP */
+#define WSM_RX_STATUS_WEP		(1<<0)
+
+/* TKIP */
+#define WSM_RX_STATUS_TKIP		(2<<0)
+
+/* AES */
+#define WSM_RX_STATUS_AES		(3<<0)
+
+/* WAPI */
+#define WSM_RX_STATUS_WAPI		(4<<0)
+
+/* Macro to fetch encryption subfield. */
+#define WSM_RX_STATUS_ENCRYPTION(status) ((status) & 0x07)
+
+/* Frame was part of an aggregation */
+#define WSM_RX_STATUS_AGGREGATE		(BIT(3))
+
+/* Frame was first in the aggregation */
+#define WSM_RX_STATUS_AGGREGATE_FIRST	(BIT(4))
+
+/* Frame was last in the aggregation */
+#define WSM_RX_STATUS_AGGREGATE_LAST	(BIT(5))
+
+/* Indicates a defragmented frame */
+#define WSM_RX_STATUS_DEFRAGMENTED	(BIT(6))
+
+/* Indicates a Beacon frame */
+#define WSM_RX_STATUS_BEACON		(BIT(7))
+
+/* Indicates STA bit beacon TIM field */
+#define WSM_RX_STATUS_TIM		(BIT(8))
+
+/* Indicates Beacon frame's virtual bitmap contains multicast bit */
+#define WSM_RX_STATUS_MULTICAST		(BIT(9))
+
+/* Indicates frame contains a matching SSID */
+#define WSM_RX_STATUS_MATCHING_SSID	(BIT(10))
+
+/* Indicates frame contains a matching BSSI */
+#define WSM_RX_STATUS_MATCHING_BSSI	(BIT(11))
+
+/* Indicates More bit set in Framectl field */
+#define WSM_RX_STATUS_MORE_DATA		(BIT(12))
+
+/* Indicates frame received during a measurement process */
+#define WSM_RX_STATUS_MEASUREMENT	(BIT(13))
+
+/* Indicates frame received as an HT packet */
+#define WSM_RX_STATUS_HT		(BIT(14))
+
+/* Indicates frame received with STBC */
+#define WSM_RX_STATUS_STBC		(BIT(15))
+
+/* Indicates Address 1 field matches dot11StationId */
+#define WSM_RX_STATUS_ADDRESS1		(BIT(16))
+
+/* Indicates Group address present in the Address 1 field */
+#define WSM_RX_STATUS_GROUP		(BIT(17))
+
+/* Indicates Broadcast address present in the Address 1 field */
+#define WSM_RX_STATUS_BROADCAST		(BIT(18))
+
+/* Indicates group key used with encrypted frames */
+#define WSM_RX_STATUS_GROUP_KEY		(BIT(19))
+
+/* Macro to fetch encryption key index. */
+#define WSM_RX_STATUS_KEY_IDX(status)	(((status >> 20)) & 0x0F)
+
+/* Indicates TSF inclusion after 802.11 frame body */
+#define WSM_RX_STATUS_TSF_INCLUDED	(BIT(24))
+
+/* Frame Control field starts at Frame offset + 2 */
+#define WSM_TX_2BYTES_SHIFT		(BIT(7))
+
+/* Join mode */
+/* IBSS */
+#define WSM_JOIN_MODE_IBSS		(0)
+
+/* BSS */
+#define WSM_JOIN_MODE_BSS		(1)
+
+/* PLCP preamble type */
+/* For long preamble */
+#define WSM_JOIN_PREAMBLE_LONG		(0)
+
+/* For short preamble (Long for 1Mbps) */
+#define WSM_JOIN_PREAMBLE_SHORT		(1)
+
+/* For short preamble (Long for 1 and 2Mbps) */
+#define WSM_JOIN_PREAMBLE_SHORT_2	(2)
+
+/* Join flags */
+/* Unsynchronized */
+#define WSM_JOIN_FLAGS_UNSYNCRONIZED	BIT(0)
+/* The BSS owner is a P2P GO */
+#define WSM_JOIN_FLAGS_P2P_GO		BIT(1)
+/* Force to join BSS with the BSSID and the
+ * SSID specified without waiting for beacons. The
+ * ProbeForJoin parameter is ignored. */
+#define WSM_JOIN_FLAGS_FORCE		BIT(2)
+/* Give probe request/response higher
+ * priority over the BT traffic */
+#define WSM_JOIN_FLAGS_PRIO		BIT(3)
+/* Issue immediate join confirmation and use
+ * join complete to notify about completion */
+#define WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND BIT(5)
+
+/* Key types */
+#define WSM_KEY_TYPE_WEP_DEFAULT	(0)
+#define WSM_KEY_TYPE_WEP_PAIRWISE	(1)
+#define WSM_KEY_TYPE_TKIP_GROUP		(2)
+#define WSM_KEY_TYPE_TKIP_PAIRWISE	(3)
+#define WSM_KEY_TYPE_AES_GROUP		(4)
+#define WSM_KEY_TYPE_AES_PAIRWISE	(5)
+#define WSM_KEY_TYPE_WAPI_GROUP		(6)
+#define WSM_KEY_TYPE_WAPI_PAIRWISE	(7)
+
+/* Key indexes */
+#define WSM_KEY_MAX_INDEX		(10)
+
+/* ACK policy */
+#define WSM_ACK_POLICY_NORMAL		(0)
+#define WSM_ACK_POLICY_NO_ACK		(1)
+
+/* Start modes */
+#define WSM_START_MODE_AP		(0)	/* Mini AP */
+#define WSM_START_MODE_P2P_GO		(1)	/* P2P GO */
+#define WSM_START_MODE_P2P_DEV		(2)	/* P2P device */
+
+/* SetAssociationMode MIB flags */
+#define WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE		(BIT(0))
+#define WSM_ASSOCIATION_MODE_USE_HT_MODE		(BIT(1))
+#define WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET		(BIT(2))
+#define WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING	(BIT(3))
+#define WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES		(BIT(4))
+
+/* RcpiRssiThreshold MIB flags */
+#define WSM_RCPI_RSSI_THRESHOLD_ENABLE	(BIT(0))
+#define WSM_RCPI_RSSI_USE_RSSI		(BIT(1))
+#define WSM_RCPI_RSSI_DONT_USE_UPPER	(BIT(2))
+#define WSM_RCPI_RSSI_DONT_USE_LOWER	(BIT(3))
+
+/* Update-ie constants */
+#define WSM_UPDATE_IE_BEACON		(BIT(0))
+#define WSM_UPDATE_IE_PROBE_RESP	(BIT(1))
+#define WSM_UPDATE_IE_PROBE_REQ		(BIT(2))
+
+/* WSM events */
+/* Error */
+#define WSM_EVENT_ERROR			(0)
+
+/* BSS lost */
+#define WSM_EVENT_BSS_LOST		(1)
+
+/* BSS regained */
+#define WSM_EVENT_BSS_REGAINED		(2)
+
+/* Radar detected */
+#define WSM_EVENT_RADAR_DETECTED	(3)
+
+/* RCPI or RSSI threshold triggered */
+#define WSM_EVENT_RCPI_RSSI		(4)
+
+/* BT inactive */
+#define WSM_EVENT_BT_INACTIVE		(5)
+
+/* BT active */
+#define WSM_EVENT_BT_ACTIVE		(6)
+
+/* MIB IDs */
+/* 4.1  dot11StationId */
+#define WSM_MIB_ID_DOT11_STATION_ID		0x0000
+
+/* 4.2  dot11MaxtransmitMsduLifeTime */
+#define WSM_MIB_ID_DOT11_MAX_TRANSMIT_LIFTIME	0x0001
+
+/* 4.3  dot11MaxReceiveLifeTime */
+#define WSM_MIB_ID_DOT11_MAX_RECEIVE_LIFETIME	0x0002
+
+/* 4.4  dot11SlotTime */
+#define WSM_MIB_ID_DOT11_SLOT_TIME		0x0003
+
+/* 4.5  dot11GroupAddressesTable */
+#define WSM_MIB_ID_DOT11_GROUP_ADDRESSES_TABLE	0x0004
+#define WSM_MAX_GRP_ADDRTABLE_ENTRIES		8
+
+/* 4.6  dot11WepDefaultKeyId */
+#define WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID	0x0005
+
+/* 4.7  dot11CurrentTxPowerLevel */
+#define WSM_MIB_ID_DOT11_CURRENT_TX_POWER_LEVEL	0x0006
+
+/* 4.8  dot11RTSThreshold */
+#define WSM_MIB_ID_DOT11_RTS_THRESHOLD		0x0007
+
+/* 4.9  NonErpProtection */
+#define WSM_MIB_ID_NON_ERP_PROTECTION		0x1000
+
+/* 4.10 ArpIpAddressesTable */
+#define WSM_MIB_ID_ARP_IP_ADDRESSES_TABLE	0x1001
+#define WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES	1
+
+/* 4.11 TemplateFrame */
+#define WSM_MIB_ID_TEMPLATE_FRAME		0x1002
+
+/* 4.12 RxFilter */
+#define WSM_MIB_ID_RX_FILTER			0x1003
+
+/* 4.13 BeaconFilterTable */
+#define WSM_MIB_ID_BEACON_FILTER_TABLE		0x1004
+
+/* 4.14 BeaconFilterEnable */
+#define WSM_MIB_ID_BEACON_FILTER_ENABLE		0x1005
+
+/* 4.15 OperationalPowerMode */
+#define WSM_MIB_ID_OPERATIONAL_POWER_MODE	0x1006
+
+/* 4.16 BeaconWakeUpPeriod */
+#define WSM_MIB_ID_BEACON_WAKEUP_PERIOD		0x1007
+
+/* 4.17 RcpiRssiThreshold */
+#define WSM_MIB_ID_RCPI_RSSI_THRESHOLD		0x1009
+
+/* 4.18 StatisticsTable */
+#define WSM_MIB_ID_STATISTICS_TABLE		0x100A
+
+/* 4.19 IbssPsConfig */
+#define WSM_MIB_ID_IBSS_PS_CONFIG		0x100B
+
+/* 4.20 CountersTable */
+#define WSM_MIB_ID_COUNTERS_TABLE		0x100C
+
+/* 4.21 BlockAckPolicy */
+#define WSM_MIB_ID_BLOCK_ACK_POLICY		0x100E
+
+/* 4.22 OverrideInternalTxRate */
+#define WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE	0x100F
+
+/* 4.23 SetAssociationMode */
+#define WSM_MIB_ID_SET_ASSOCIATION_MODE		0x1010
+
+/* 4.24 UpdateEptaConfigData */
+#define WSM_MIB_ID_UPDATE_EPTA_CONFIG_DATA	0x1011
+
+/* 4.25 SelectCcaMethod */
+#define WSM_MIB_ID_SELECT_CCA_METHOD		0x1012
+
+/* 4.26 SetUpasdInformation */
+#define WSM_MIB_ID_SET_UAPSD_INFORMATION	0x1013
+
+/* 4.27 SetAutoCalibrationMode  WBF00004073 */
+#define WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE	0x1015
+
+/* 4.28 SetTxRateRetryPolicy */
+#define WSM_MIB_ID_SET_TX_RATE_RETRY_POLICY	0x1016
+
+/* 4.29 SetHostMessageTypeFilter */
+#define WSM_MIB_ID_SET_HOST_MSG_TYPE_FILTER	0x1017
+
+/* 4.30 P2PFindInfo */
+#define WSM_MIB_ID_P2P_FIND_INFO		0x1018
+
+/* 4.31 P2PPsModeInfo */
+#define WSM_MIB_ID_P2P_PS_MODE_INFO		0x1019
+
+/* 4.32 SetEtherTypeDataFrameFilter */
+#define WSM_MIB_ID_SET_ETHERTYPE_DATAFRAME_FILTER 0x101A
+
+/* 4.33 SetUDPPortDataFrameFilter */
+#define WSM_MIB_ID_SET_UDPPORT_DATAFRAME_FILTER	0x101B
+
+/* 4.34 SetMagicDataFrameFilter */
+#define WSM_MIB_ID_SET_MAGIC_DATAFRAME_FILTER	0x101C
+
+/* 4.35 P2PDeviceInfo */
+#define WSM_MIB_ID_P2P_DEVICE_INFO		0x101D
+
+/* 4.36 SetWCDMABand */
+#define WSM_MIB_ID_SET_WCDMA_BAND		0x101E
+
+/* 4.37 GroupTxSequenceCounter */
+#define WSM_MIB_ID_GRP_SEQ_COUNTER		0x101F
+
+/* 4.38 ProtectedMgmtPolicy */
+#define WSM_MIB_ID_PROTECTED_MGMT_POLICY	0x1020
+
+/* 4.39 SetHtProtection */
+#define WSM_MIB_ID_SET_HT_PROTECTION		0x1021
+
+/* 4.40 GPIO Command */
+#define WSM_MIB_ID_GPIO_COMMAND			0x1022
+
+/* 4.41 TSF Counter Value */
+#define WSM_MIB_ID_TSF_COUNTER			0x1023
+
+/* Test Purposes Only */
+#define WSM_MIB_ID_BLOCK_ACK_INFO		0x100D
+
+/* 4.42 UseMultiTxConfMessage */
+#define WSM_MIB_USE_MULTI_TX_CONF		0x1024
+
+/* 4.43 Keep-alive period */
+#define WSM_MIB_ID_KEEP_ALIVE_PERIOD		0x1025
+
+/* 4.44 Disable BSSID filter */
+#define WSM_MIB_ID_DISABLE_BSSID_FILTER		0x1026
+
+/* Frame template types */
+#define WSM_FRAME_TYPE_PROBE_REQUEST	(0)
+#define WSM_FRAME_TYPE_BEACON		(1)
+#define WSM_FRAME_TYPE_NULL		(2)
+#define WSM_FRAME_TYPE_QOS_NULL		(3)
+#define WSM_FRAME_TYPE_PS_POLL		(4)
+#define WSM_FRAME_TYPE_PROBE_RESPONSE	(5)
+
+#define WSM_FRAME_GREENFIELD		(0x80)	/* See 4.11 */
+
+/* Status */
+/* The WSM firmware has completed a request */
+/* successfully. */
+#define WSM_STATUS_SUCCESS              (0)
+
+/* This is a generic failure code if other error codes do */
+/* not apply. */
+#define WSM_STATUS_FAILURE              (1)
+
+/* A request contains one or more invalid parameters. */
+#define WSM_INVALID_PARAMETER           (2)
+
+/* The request cannot perform because the device is in */
+/* an inappropriate mode. */
+#define WSM_ACCESS_DENIED               (3)
+
+/* The frame received includes a decryption error. */
+#define WSM_STATUS_DECRYPTFAILURE       (4)
+
+/* A MIC failure is detected in the received packets. */
+#define WSM_STATUS_MICFAILURE           (5)
+
+/* The transmit request failed due to retry limit being */
+/* exceeded. */
+#define WSM_STATUS_RETRY_EXCEEDED       (6)
+
+/* The transmit request failed due to MSDU life time */
+/* being exceeded. */
+#define WSM_STATUS_TX_LIFETIME_EXCEEDED (7)
+
+/* The link to the AP is lost. */
+#define WSM_STATUS_LINK_LOST            (8)
+
+/* No key was found for the encrypted frame */
+#define WSM_STATUS_NO_KEY_FOUND         (9)
+
+/* Jammer was detected when transmitting this frame */
+#define WSM_STATUS_JAMMER_DETECTED      (10)
+
+/* The message should be requeued later. */
+/* This is applicable only to Transmit */
+#define WSM_REQUEUE                     (11)
+
+/* Advanced filtering options */
+#define WSM_MAX_FILTER_ELEMENTS		(4)
+
+#define WSM_FILTER_ACTION_IGNORE	(0)
+#define WSM_FILTER_ACTION_FILTER_IN	(1)
+#define WSM_FILTER_ACTION_FILTER_OUT	(2)
+
+#define WSM_FILTER_PORT_TYPE_DST	(0)
+#define WSM_FILTER_PORT_TYPE_SRC	(1)
+
+/* Actual header of WSM messages */
+struct wsm_hdr {
+	__le16 len;
+	__le16 id;
+};
+
+#define WSM_TX_SEQ_MAX			(7)
+#define WSM_TX_SEQ(seq)			\
+		((seq & WSM_TX_SEQ_MAX) << 13)
+#define WSM_TX_LINK_ID_MAX		(0x0F)
+#define WSM_TX_LINK_ID(link_id)		\
+		((link_id & WSM_TX_LINK_ID_MAX) << 6)
+
+#define MAX_BEACON_SKIP_TIME_MS 1000
+
+#define WSM_CMD_LAST_CHANCE_TIMEOUT (HZ * 3 / 2)
+
+/* ******************************************************************** */
+/* WSM capability							*/
+
+#define WSM_STARTUP_IND_ID 0x0801
+
+struct wsm_startup_ind {
+	u16 input_buffers;
+	u16 input_buffer_size;
+	u16 status;
+	u16 hw_id;
+	u16 hw_subid;
+	u16 fw_cap;
+	u16 fw_type;
+	u16 fw_api;
+	u16 fw_build;
+	u16 fw_ver;
+	char fw_label[128];
+	u32 config[4];
+};
+
+/* ******************************************************************** */
+/* WSM commands								*/
+
+/* 3.1 */
+#define WSM_CONFIGURATION_REQ_ID 0x0009
+#define WSM_CONFIGURATION_RESP_ID 0x0409
+
+struct wsm_tx_power_range {
+	int min_power_level;
+	int max_power_level;
+	u32 stepping;
+};
+
+struct wsm_configuration {
+	/* [in] */ u32 dot11MaxTransmitMsduLifeTime;
+	/* [in] */ u32 dot11MaxReceiveLifeTime;
+	/* [in] */ u32 dot11RtsThreshold;
+	/* [in, out] */ u8 *dot11StationId;
+	/* [in] */ const void *dpdData;
+	/* [in] */ size_t dpdData_size;
+	/* [out] */ u8 dot11FrequencyBandsSupported;
+	/* [out] */ u32 supportedRateMask;
+	/* [out] */ struct wsm_tx_power_range txPowerRange[2];
+};
+
+int wsm_configuration(struct cw1200_common *priv,
+		      struct wsm_configuration *arg);
+
+/* 3.3 */
+#define WSM_RESET_REQ_ID 0x000A
+#define WSM_RESET_RESP_ID 0x040A
+struct wsm_reset {
+	/* [in] */ int link_id;
+	/* [in] */ bool reset_statistics;
+};
+
+int wsm_reset(struct cw1200_common *priv, const struct wsm_reset *arg);
+
+/* 3.5 */
+#define WSM_READ_MIB_REQ_ID 0x0005
+#define WSM_READ_MIB_RESP_ID 0x0405
+int wsm_read_mib(struct cw1200_common *priv, u16 mib_id, void *buf,
+		 size_t buf_size);
+
+/* 3.7 */
+#define WSM_WRITE_MIB_REQ_ID 0x0006
+#define WSM_WRITE_MIB_RESP_ID 0x0406
+int wsm_write_mib(struct cw1200_common *priv, u16 mib_id, void *buf,
+		  size_t buf_size);
+
+/* 3.9 */
+#define WSM_START_SCAN_REQ_ID 0x0007
+#define WSM_START_SCAN_RESP_ID 0x0407
+
+struct wsm_ssid {
+	u8 ssid[32];
+	u32 length;
+};
+
+struct wsm_scan_ch {
+	u16 number;
+	u32 min_chan_time;
+	u32 max_chan_time;
+	u32 tx_power_level;
+};
+
+struct wsm_scan {
+	/* WSM_PHY_BAND_... */
+	u8 band;
+
+	/* WSM_SCAN_TYPE_... */
+	u8 type;
+
+	/* WSM_SCAN_FLAG_... */
+	u8 flags;
+
+	/* WSM_TRANSMIT_RATE_... */
+	u8 max_tx_rate;
+
+	/* Interval period in TUs that the device shall the re- */
+	/* execute the requested scan. Max value supported by the device */
+	/* is 256s. */
+	u32 auto_scan_interval;
+
+	/* Number of probe requests (per SSID) sent to one (1) */
+	/* channel. Zero (0) means that none is send, which */
+	/* means that a passive scan is to be done. Value */
+	/* greater than zero (0) means that an active scan is to */
+	/* be done. */
+	u32 num_probes;
+
+	/* Number of channels to be scanned. */
+	/* Maximum value is WSM_SCAN_MAX_NUM_OF_CHANNELS. */
+	u8 num_channels;
+
+	/* Number of SSID provided in the scan command (this */
+	/* is zero (0) in broadcast scan) */
+	/* The maximum number of SSIDs is WSM_SCAN_MAX_NUM_OF_SSIDS. */
+	u8 num_ssids;
+
+	/* The delay time (in microseconds) period */
+	/* before sending a probe-request. */
+	u8 probe_delay;
+
+	/* SSIDs to be scanned [numOfSSIDs]; */
+	struct wsm_ssid *ssids;
+
+	/* Channels to be scanned [numOfChannels]; */
+	struct wsm_scan_ch *ch;
+};
+
+int wsm_scan(struct cw1200_common *priv, const struct wsm_scan *arg);
+
+/* 3.11 */
+#define WSM_STOP_SCAN_REQ_ID 0x0008
+#define WSM_STOP_SCAN_RESP_ID 0x0408
+int wsm_stop_scan(struct cw1200_common *priv);
+
+/* 3.13 */
+#define WSM_SCAN_COMPLETE_IND_ID 0x0806
+struct wsm_scan_complete {
+	/* WSM_STATUS_... */
+	u32 status;
+
+	/* WSM_PSM_... */
+	u8 psm;
+
+	/* Number of channels that the scan operation completed. */
+	u8 num_channels;
+};
+
+/* 3.14 */
+#define WSM_TX_CONFIRM_IND_ID 0x0404
+#define WSM_MULTI_TX_CONFIRM_ID 0x041E
+
+struct wsm_tx_confirm {
+	/* Packet identifier used in wsm_tx. */
+	u32 packet_id;
+
+	/* WSM_STATUS_... */
+	u32 status;
+
+	/* WSM_TRANSMIT_RATE_... */
+	u8 tx_rate;
+
+	/* The number of times the frame was transmitted */
+	/* without receiving an acknowledgement. */
+	u8 ack_failures;
+
+	/* WSM_TX_STATUS_... */
+	u16 flags;
+
+	/* The total time in microseconds that the frame spent in */
+	/* the WLAN device before transmission as completed. */
+	u32 media_delay;
+
+	/* The total time in microseconds that the frame spent in */
+	/* the WLAN device before transmission was started. */
+	u32 tx_queue_delay;
+};
+
+/* 3.15 */
+typedef void (*wsm_tx_confirm_cb) (struct cw1200_common *priv,
+				   struct wsm_tx_confirm *arg);
+
+/* Note that ideology of wsm_tx struct is different against the rest of
+ * WSM API. wsm_hdr is /not/ a caller-adapted struct to be used as an input
+ * argument for WSM call, but a prepared bytestream to be sent to firmware.
+ * It is filled partly in cw1200_tx, partly in low-level WSM code.
+ * Please pay attention once again: ideology is different.
+ *
+ * Legend:
+ * - [in]: cw1200_tx must fill this field.
+ * - [wsm]: the field is filled by low-level WSM.
+ */
+struct wsm_tx {
+	/* common WSM header */
+	struct wsm_hdr hdr;
+
+	/* Packet identifier that meant to be used in completion. */
+	__le32 packet_id;
+
+	/* WSM_TRANSMIT_RATE_... */
+	u8 max_tx_rate;
+
+	/* WSM_QUEUE_... */
+	u8 queue_id;
+
+	/* True: another packet is pending on the host for transmission. */
+	u8 more;
+
+	/* Bit 0 = 0 - Start expiry time from first Tx attempt (default) */
+	/* Bit 0 = 1 - Start expiry time from receipt of Tx Request */
+	/* Bits 3:1  - PTA Priority */
+	/* Bits 6:4  - Tx Rate Retry Policy */
+	/* Bit 7 - Reserved */
+	u8 flags;
+
+	/* Should be 0. */
+	__le32 reserved;
+
+	/* The elapsed time in TUs, after the initial transmission */
+	/* of an MSDU, after which further attempts to transmit */
+	/* the MSDU shall be terminated. Overrides the global */
+	/* dot11MaxTransmitMsduLifeTime setting [optional] */
+	/* Device will set the default value if this is 0. */
+	__le32 expire_time;
+
+	/* WSM_HT_TX_... */
+	__le32 ht_tx_parameters;
+};
+
+/* = sizeof(generic hi hdr) + sizeof(wsm hdr) + sizeof(alignment) */
+#define WSM_TX_EXTRA_HEADROOM (28)
+
+/* 3.16 */
+#define WSM_RECEIVE_IND_ID 0x0804
+
+struct wsm_rx {
+	/* WSM_STATUS_... */
+	__le32 status;
+
+	/* Specifies the channel of the received packet. */
+	__le16 channel_number;
+
+	/* WSM_TRANSMIT_RATE_... */
+	u8 rx_rate;
+
+	/* This value is expressed in signed Q8.0 format for */
+	/* RSSI and unsigned Q7.1 format for RCPI. */
+	u8 rcpi_rssi;
+
+	/* WSM_RX_STATUS_... */
+	__le32 flags;
+
+	/* Payload */
+	u8 data[0];
+} __packed;
+
+/* = sizeof(generic hi hdr) + sizeof(wsm hdr) */
+#define WSM_RX_EXTRA_HEADROOM (16)
+
+typedef void (*wsm_rx_cb) (struct cw1200_common *priv, struct wsm_rx *arg,
+			   struct sk_buff **skb_p);
+
+/* 3.17 */
+struct wsm_event {
+	/* WSM_STATUS_... */
+	/* [out] */ u32 id;
+
+	/* Indication parameters. */
+	/* For error indication, this shall be a 32-bit WSM status. */
+	/* For RCPI or RSSI indication, this should be an 8-bit */
+	/* RCPI or RSSI value. */
+	/* [out] */ u32 data;
+};
+
+struct cw1200_wsm_event {
+	struct list_head link;
+	struct wsm_event evt;
+};
+
+/* 3.18 - 3.22 */
+/* Measurement. Skipped for now. Irrelevent. */
+
+typedef void (*wsm_event_cb) (struct cw1200_common *priv,
+			      struct wsm_event *arg);
+
+/* 3.23 */
+#define WSM_JOIN_REQ_ID 0x000B
+#define WSM_JOIN_RESP_ID 0x040B
+
+struct wsm_join {
+	/* WSM_JOIN_MODE_... */
+	u8 mode;
+
+	/* WSM_PHY_BAND_... */
+	u8 band;
+
+	/* Specifies the channel number to join. The channel */
+	/* number will be mapped to an actual frequency */
+	/* according to the band */
+	u16 channel_number;
+
+	/* Specifies the BSSID of the BSS or IBSS to be joined */
+	/* or the IBSS to be started. */
+	u8 bssid[6];
+
+	/* ATIM window of IBSS */
+	/* When ATIM window is zero the initiated IBSS does */
+	/* not support power saving. */
+	u16 atim_window;
+
+	/* WSM_JOIN_PREAMBLE_... */
+	u8 preamble_type;
+
+	/* Specifies if a probe request should be send with the */
+	/* specified SSID when joining to the network. */
+	u8 probe_for_join;
+
+	/* DTIM Period (In multiples of beacon interval) */
+	u8 dtim_period;
+
+	/* WSM_JOIN_FLAGS_... */
+	u8 flags;
+
+	/* Length of the SSID */
+	u32 ssid_len;
+
+	/* Specifies the SSID of the IBSS to join or start */
+	u8 ssid[32];
+
+	/* Specifies the time between TBTTs in TUs */
+	u32 beacon_interval;
+
+	/* A bit mask that defines the BSS basic rate set. */
+	u32 basic_rate_set;
+};
+
+struct wsm_join_cnf {
+	u32 status;
+
+	/* Minimum transmission power level in units of 0.1dBm */
+	u32 min_power_level;
+
+	/* Maximum transmission power level in units of 0.1dBm */
+	u32 max_power_level;
+};
+
+int wsm_join(struct cw1200_common *priv, struct wsm_join *arg);
+
+/* 3.24 */
+struct wsm_join_complete {
+	/* WSM_STATUS_... */
+	u32 status;
+};
+
+/* 3.25 */
+#define WSM_SET_PM_REQ_ID 0x0010
+#define WSM_SET_PM_RESP_ID 0x0410
+struct wsm_set_pm {
+	/* WSM_PSM_... */
+	u8 mode;
+
+	/* in unit of 500us; 0 to use default */
+	u8 fast_psm_idle_period;
+
+	/* in unit of 500us; 0 to use default */
+	u8 ap_psm_change_period;
+
+	/* in unit of 500us; 0 to disable auto-pspoll */
+	u8 min_auto_pspoll_period;
+};
+
+int wsm_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg);
+
+/* 3.27 */
+struct wsm_set_pm_complete {
+	u8 psm;			/* WSM_PSM_... */
+};
+
+/* 3.28 */
+#define WSM_SET_BSS_PARAMS_REQ_ID 0x0011
+#define WSM_SET_BSS_PARAMS_RESP_ID 0x0411
+struct wsm_set_bss_params {
+	/* This resets the beacon loss counters only */
+	u8 reset_beacon_loss;
+
+	/* The number of lost consecutive beacons after which */
+	/* the WLAN device should indicate the BSS-Lost event */
+	/* to the WLAN host driver. */
+	u8 beacon_lost_count;
+
+	/* The AID received during the association process. */
+	u16 aid;
+
+	/* The operational rate set mask */
+	u32 operational_rate_set;
+};
+
+int wsm_set_bss_params(struct cw1200_common *priv,
+		       const struct wsm_set_bss_params *arg);
+
+/* 3.30 */
+#define WSM_ADD_KEY_REQ_ID         0x000C
+#define WSM_ADD_KEY_RESP_ID        0x040C
+struct wsm_add_key {
+	u8 type;		/* WSM_KEY_TYPE_... */
+	u8 index;		/* Key entry index: 0 -- WSM_KEY_MAX_INDEX */
+	u16 reserved;
+	union {
+		struct {
+			u8 peer[6];	/* MAC address of the
+						 * peer station */
+			u8 reserved;
+			u8 keylen;		/* Key length in bytes */
+			u8 keydata[16];		/* Key data */
+		} __packed wep_pairwise;
+		struct {
+			u8 keyid;		/* Unique per key identifier
+						 * (0..3) */
+			u8 keylen;		/* Key length in bytes */
+			u16 reserved;
+			u8 keydata[16];		/* Key data */
+		} __packed wep_group;
+		struct {
+			u8 peer[6];	/* MAC address of the
+						 * peer station */
+			u16 reserved;
+			u8 keydata[16];	/* TKIP key data */
+			u8 rx_mic_key[8];		/* Rx MIC key */
+			u8 tx_mic_key[8];		/* Tx MIC key */
+		} __packed tkip_pairwise;
+		struct {
+			u8 keydata[16];	/* TKIP key data */
+			u8 rx_mic_key[8];		/* Rx MIC key */
+			u8 keyid;		/* Key ID */
+			u8 reserved[3];
+			u8 rx_seqnum[8];	/* Receive Sequence Counter */
+		} __packed tkip_group;
+		struct {
+			u8 peer[6];	/* MAC address of the
+						 * peer station */
+			u16 reserved;
+			u8 keydata[16];	/* AES key data */
+		} __packed aes_pairwise;
+		struct {
+			u8 keydata[16];	/* AES key data */
+			u8 keyid;		/* Key ID */
+			u8 reserved[3];
+			u8 rx_seqnum[8];	/* Receive Sequence Counter */
+		} __packed aes_group;
+		struct {
+			u8 peer[6];	/* MAC address of the
+						 * peer station */
+			u8 keyid;		/* Key ID */
+			u8 reserved;
+			u8 keydata[16];	/* WAPI key data */
+			u8 mic_key[16];	/* MIC key data */
+		} __packed wapi_pairwise;
+		struct {
+			u8 keydata[16];	/* WAPI key data */
+			u8 mic_key[16];	/* MIC key data */
+			u8 keyid;		/* Key ID */
+			u8 reserved[3];
+		} __packed wapi_group;
+	} __packed;
+} __packed;
+
+int wsm_add_key(struct cw1200_common *priv, const struct wsm_add_key *arg);
+
+/* 3.32 */
+#define WSM_REMOVE_KEY_REQ_ID         0x000D
+#define WSM_REMOVE_KEY_RESP_ID        0x040D
+struct wsm_remove_key {
+	u8 index; /* Key entry index : 0-10 */
+};
+
+int wsm_remove_key(struct cw1200_common *priv,
+		   const struct wsm_remove_key *arg);
+
+/* 3.34 */
+struct wsm_set_tx_queue_params {
+	/* WSM_ACK_POLICY_... */
+	u8 ackPolicy;
+
+	/* Medium Time of TSPEC (in 32us units) allowed per */
+	/* One Second Averaging Period for this queue. */
+	u16 allowedMediumTime;
+
+	/* dot11MaxTransmitMsduLifetime to be used for the */
+	/* specified queue. */
+	u32 maxTransmitLifetime;
+};
+
+struct wsm_tx_queue_params {
+	/* NOTE: index is a linux queue id. */
+	struct wsm_set_tx_queue_params params[4];
+};
+
+
+#define WSM_TX_QUEUE_SET(queue_params, queue, ack_policy, allowed_time,\
+		max_life_time)	\
+do {							\
+	struct wsm_set_tx_queue_params *p = &(queue_params)->params[queue]; \
+	p->ackPolicy = (ack_policy);				\
+	p->allowedMediumTime = (allowed_time);				\
+	p->maxTransmitLifetime = (max_life_time);			\
+} while (0)
+
+int wsm_set_tx_queue_params(struct cw1200_common *priv,
+			    const struct wsm_set_tx_queue_params *arg, u8 id);
+
+/* 3.36 */
+#define WSM_EDCA_PARAMS_REQ_ID 0x0013
+#define WSM_EDCA_PARAMS_RESP_ID 0x0413
+struct wsm_edca_queue_params {
+	/* CWmin (in slots) for the access class. */
+	__le16 cwmin;
+
+	/* CWmax (in slots) for the access class. */
+	__le16 cwmax;
+
+	/* AIFS (in slots) for the access class. */
+	__le16 aifns;
+
+	/* TX OP Limit (in microseconds) for the access class. */
+	__le16 txop_limit;
+
+	/* dot11MaxReceiveLifetime to be used for the specified */
+	/* the access class. Overrides the global */
+	/* dot11MaxReceiveLifetime value */
+	__le32 max_rx_lifetime;
+} __packed;
+
+struct wsm_edca_params {
+	/* NOTE: index is a linux queue id. */
+	struct wsm_edca_queue_params params[4];
+	bool uapsd_enable[4];
+};
+
+#define TXOP_UNIT 32
+#define WSM_EDCA_SET(__edca, __queue, __aifs, __cw_min, __cw_max, __txop, __lifetime,\
+		     __uapsd) \
+	do {							\
+		struct wsm_edca_queue_params *p = &(__edca)->params[__queue]; \
+		p->cwmin = (__cw_min);				\
+		p->cwmax = (__cw_max);				\
+		p->aifns = (__aifs);				\
+		p->txop_limit = ((__txop) * TXOP_UNIT);		\
+		p->max_rx_lifetime = (__lifetime);		\
+		(__edca)->uapsd_enable[__queue] = (__uapsd);	\
+	} while (0)
+
+int wsm_set_edca_params(struct cw1200_common *priv,
+			const struct wsm_edca_params *arg);
+
+int wsm_set_uapsd_param(struct cw1200_common *priv,
+			const struct wsm_edca_params *arg);
+
+/* 3.38 */
+/* Set-System info. Skipped for now. Irrelevent. */
+
+/* 3.40 */
+#define WSM_SWITCH_CHANNEL_REQ_ID 0x0016
+#define WSM_SWITCH_CHANNEL_RESP_ID 0x0416
+
+struct wsm_switch_channel {
+	/* 1 - means the STA shall not transmit any further */
+	/* frames until the channel switch has completed */
+	u8 mode;
+
+	/* Number of TBTTs until channel switch occurs. */
+	/* 0 - indicates switch shall occur at any time */
+	/* 1 - occurs immediately before the next TBTT */
+	u8 switch_count;
+
+	/* The new channel number to switch to. */
+	/* Note this is defined as per section 2.7. */
+	u16 channel_number;
+};
+
+int wsm_switch_channel(struct cw1200_common *priv,
+		       const struct wsm_switch_channel *arg);
+
+typedef void (*wsm_channel_switch_cb) (struct cw1200_common *priv);
+
+#define WSM_START_REQ_ID 0x0017
+#define WSM_START_RESP_ID 0x0417
+
+struct wsm_start {
+	/* WSM_START_MODE_... */
+	/* [in] */ u8 mode;
+
+	/* WSM_PHY_BAND_... */
+	/* [in] */ u8 band;
+
+	/* Channel number */
+	/* [in] */ u16 channel_number;
+
+	/* Client Traffic window in units of TU */
+	/* Valid only when mode == ..._P2P */
+	/* [in] */ u32 ct_window;
+
+	/* Interval between two consecutive */
+	/* beacon transmissions in TU. */
+	/* [in] */ u32 beacon_interval;
+
+	/* DTIM period in terms of beacon intervals */
+	/* [in] */ u8 dtim_period;
+
+	/* WSM_JOIN_PREAMBLE_... */
+	/* [in] */ u8 preamble;
+
+	/* The delay time (in microseconds) period */
+	/* before sending a probe-request. */
+	/* [in] */ u8 probe_delay;
+
+	/* Length of the SSID */
+	/* [in] */ u8 ssid_len;
+
+	/* SSID of the BSS or P2P_GO to be started now. */
+	/* [in] */ u8 ssid[32];
+
+	/* The basic supported rates for the MiniAP. */
+	/* [in] */ u32 basic_rate_set;
+};
+
+int wsm_start(struct cw1200_common *priv, const struct wsm_start *arg);
+
+#define WSM_BEACON_TRANSMIT_REQ_ID 0x0018
+#define WSM_BEACON_TRANSMIT_RESP_ID 0x0418
+
+struct wsm_beacon_transmit {
+	/* 1: enable; 0: disable */
+	/* [in] */ u8 enable_beaconing;
+};
+
+int wsm_beacon_transmit(struct cw1200_common *priv,
+			const struct wsm_beacon_transmit *arg);
+
+int wsm_start_find(struct cw1200_common *priv);
+
+int wsm_stop_find(struct cw1200_common *priv);
+
+typedef void (*wsm_find_complete_cb) (struct cw1200_common *priv, u32 status);
+
+struct wsm_suspend_resume {
+	/* See 3.52 */
+	/* Link ID */
+	/* [out] */ int link_id;
+	/* Stop sending further Tx requests down to device for this link */
+	/* [out] */ bool stop;
+	/* Transmit multicast Frames */
+	/* [out] */ bool multicast;
+	/* The AC on which Tx to be suspended /resumed. */
+	/* This is applicable only for U-APSD */
+	/* WSM_QUEUE_... */
+	/* [out] */ int queue;
+};
+
+typedef void (*wsm_suspend_resume_cb) (struct cw1200_common *priv,
+				       struct wsm_suspend_resume *arg);
+
+/* 3.54 Update-IE request. */
+struct wsm_update_ie {
+	/* WSM_UPDATE_IE_... */
+	/* [in] */ u16 what;
+	/* [in] */ u16 count;
+	/* [in] */ u8 *ies;
+	/* [in] */ size_t length;
+};
+
+int wsm_update_ie(struct cw1200_common *priv,
+		  const struct wsm_update_ie *arg);
+
+/* 3.56 */
+struct wsm_map_link {
+	/* MAC address of the remote device */
+	/* [in] */ u8 mac_addr[6];
+	/* [in] */ u8 link_id;
+};
+
+int wsm_map_link(struct cw1200_common *priv, const struct wsm_map_link *arg);
+
+/* ******************************************************************** */
+/* MIB shortcats							*/
+
+static inline int wsm_set_output_power(struct cw1200_common *priv,
+				       int power_level)
+{
+	__le32 val = __cpu_to_le32(power_level);
+	return wsm_write_mib(priv, WSM_MIB_ID_DOT11_CURRENT_TX_POWER_LEVEL,
+			     &val, sizeof(val));
+}
+
+static inline int wsm_set_beacon_wakeup_period(struct cw1200_common *priv,
+					       unsigned dtim_interval,
+					       unsigned listen_interval)
+{
+	struct {
+		u8 numBeaconPeriods;
+		u8 reserved;
+		__le16 listenInterval;
+	} val = {
+		dtim_interval, 0, __cpu_to_le16(listen_interval)
+	};
+
+	if (dtim_interval > 0xFF || listen_interval > 0xFFFF)
+		return -EINVAL;
+	else
+		return wsm_write_mib(priv, WSM_MIB_ID_BEACON_WAKEUP_PERIOD,
+				     &val, sizeof(val));
+}
+
+struct wsm_rcpi_rssi_threshold {
+	u8 rssiRcpiMode;	/* WSM_RCPI_RSSI_... */
+	u8 lowerThreshold;
+	u8 upperThreshold;
+	u8 rollingAverageCount;
+};
+
+static inline int wsm_set_rcpi_rssi_threshold(struct cw1200_common *priv,
+					struct wsm_rcpi_rssi_threshold *arg)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_RCPI_RSSI_THRESHOLD, arg,
+			     sizeof(*arg));
+}
+
+struct wsm_mib_counters_table {
+	__le32 plcp_errors;
+	__le32 fcs_errors;
+	__le32 tx_packets;
+	__le32 rx_packets;
+	__le32 rx_packet_errors;
+	__le32 rx_decryption_failures;
+	__le32 rx_mic_failures;
+	__le32 rx_no_key_failures;
+	__le32 tx_multicast_frames;
+	__le32 tx_frames_success;
+	__le32 tx_frame_failures;
+	__le32 tx_frames_retried;
+	__le32 tx_frames_multi_retried;
+	__le32 rx_frame_duplicates;
+	__le32 rts_success;
+	__le32 rts_failures;
+	__le32 ack_failures;
+	__le32 rx_multicast_frames;
+	__le32 rx_frames_success;
+	__le32 rx_cmac_icv_errors;
+	__le32 rx_cmac_replays;
+	__le32 rx_mgmt_ccmp_replays;
+} __packed;
+
+static inline int wsm_get_counters_table(struct cw1200_common *priv,
+					 struct wsm_mib_counters_table *arg)
+{
+	return wsm_read_mib(priv, WSM_MIB_ID_COUNTERS_TABLE,
+			    arg, sizeof(*arg));
+}
+
+static inline int wsm_get_station_id(struct cw1200_common *priv, u8 *mac)
+{
+	return wsm_read_mib(priv, WSM_MIB_ID_DOT11_STATION_ID, mac, ETH_ALEN);
+}
+
+struct wsm_rx_filter {
+	bool promiscuous;
+	bool bssid;
+	bool fcs;
+	bool probeResponder;
+};
+
+static inline int wsm_set_rx_filter(struct cw1200_common *priv,
+				    const struct wsm_rx_filter *arg)
+{
+	__le32 val = 0;
+	if (arg->promiscuous)
+		val |= __cpu_to_le32(BIT(0));
+	if (arg->bssid)
+		val |= __cpu_to_le32(BIT(1));
+	if (arg->fcs)
+		val |= __cpu_to_le32(BIT(2));
+	if (arg->probeResponder)
+		val |= __cpu_to_le32(BIT(3));
+	return wsm_write_mib(priv, WSM_MIB_ID_RX_FILTER, &val, sizeof(val));
+}
+
+int wsm_set_probe_responder(struct cw1200_common *priv, bool enable);
+
+#define WSM_BEACON_FILTER_IE_HAS_CHANGED	BIT(0)
+#define WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT	BIT(1)
+#define WSM_BEACON_FILTER_IE_HAS_APPEARED	BIT(2)
+
+struct wsm_beacon_filter_table_entry {
+	u8	ie_id;
+	u8	flags;
+	u8	oui[3];
+	u8	match_data[3];
+} __packed;
+
+struct wsm_mib_beacon_filter_table {
+	__le32 num;
+	struct wsm_beacon_filter_table_entry entry[10];
+} __packed;
+
+static inline int wsm_set_beacon_filter_table(struct cw1200_common *priv,
+					      struct wsm_mib_beacon_filter_table *ft)
+{
+	size_t size = __le32_to_cpu(ft->num) *
+		     sizeof(struct wsm_beacon_filter_table_entry) +
+		     sizeof(__le32);
+
+	return wsm_write_mib(priv, WSM_MIB_ID_BEACON_FILTER_TABLE, ft, size);
+}
+
+#define WSM_BEACON_FILTER_ENABLE	BIT(0) /* Enable/disable beacon filtering */
+#define WSM_BEACON_FILTER_AUTO_ERP	BIT(1) /* If 1 FW will handle ERP IE changes internally */
+
+struct wsm_beacon_filter_control {
+	int enabled;
+	int bcn_count;
+};
+
+static inline int wsm_beacon_filter_control(struct cw1200_common *priv,
+					struct wsm_beacon_filter_control *arg)
+{
+	struct {
+		__le32 enabled;
+		__le32 bcn_count;
+	} val;
+	val.enabled = __cpu_to_le32(arg->enabled);
+	val.bcn_count = __cpu_to_le32(arg->bcn_count);
+	return wsm_write_mib(priv, WSM_MIB_ID_BEACON_FILTER_ENABLE, &val,
+			     sizeof(val));
+}
+
+enum wsm_power_mode {
+	wsm_power_mode_active = 0,
+	wsm_power_mode_doze = 1,
+	wsm_power_mode_quiescent = 2,
+};
+
+struct wsm_operational_mode {
+	enum wsm_power_mode power_mode;
+	int disable_more_flag_usage;
+	int perform_ant_diversity;
+};
+
+static inline int wsm_set_operational_mode(struct cw1200_common *priv,
+					const struct wsm_operational_mode *arg)
+{
+	u8 val = arg->power_mode;
+	if (arg->disable_more_flag_usage)
+		val |= BIT(4);
+	if (arg->perform_ant_diversity)
+		val |= BIT(5);
+	return wsm_write_mib(priv, WSM_MIB_ID_OPERATIONAL_POWER_MODE, &val,
+			     sizeof(val));
+}
+
+struct wsm_template_frame {
+	u8 frame_type;
+	u8 rate;
+	struct sk_buff *skb;
+};
+
+static inline int wsm_set_template_frame(struct cw1200_common *priv,
+					 struct wsm_template_frame *arg)
+{
+	int ret;
+	u8 *p = skb_push(arg->skb, 4);
+	p[0] = arg->frame_type;
+	p[1] = arg->rate;
+	((u16 *)p)[1] = __cpu_to_le16(arg->skb->len - 4);
+	ret = wsm_write_mib(priv, WSM_MIB_ID_TEMPLATE_FRAME, p, arg->skb->len);
+	skb_pull(arg->skb, 4);
+	return ret;
+}
+
+
+struct wsm_protected_mgmt_policy {
+	bool protectedMgmtEnable;
+	bool unprotectedMgmtFramesAllowed;
+	bool encryptionForAuthFrame;
+};
+
+static inline int wsm_set_protected_mgmt_policy(struct cw1200_common *priv,
+		struct wsm_protected_mgmt_policy *arg)
+{
+	__le32 val = 0;
+	int ret;
+	if (arg->protectedMgmtEnable)
+		val |= __cpu_to_le32(BIT(0));
+	if (arg->unprotectedMgmtFramesAllowed)
+		val |= __cpu_to_le32(BIT(1));
+	if (arg->encryptionForAuthFrame)
+		val |= __cpu_to_le32(BIT(2));
+	ret = wsm_write_mib(priv, WSM_MIB_ID_PROTECTED_MGMT_POLICY,
+			&val, sizeof(val));
+	return ret;
+}
+
+struct wsm_mib_block_ack_policy {
+	u8 tx_tid;
+	u8 reserved1;
+	u8 rx_tid;
+	u8 reserved2;
+} __packed;
+
+static inline int wsm_set_block_ack_policy(struct cw1200_common *priv,
+					   u8 tx_tid_policy,
+					   u8 rx_tid_policy)
+{
+	struct wsm_mib_block_ack_policy val = {
+		.tx_tid = tx_tid_policy,
+		.rx_tid = rx_tid_policy,
+	};
+	return wsm_write_mib(priv, WSM_MIB_ID_BLOCK_ACK_POLICY, &val,
+			     sizeof(val));
+}
+
+struct wsm_mib_association_mode {
+	u8 flags;		/* WSM_ASSOCIATION_MODE_... */
+	u8 preamble;	/* WSM_JOIN_PREAMBLE_... */
+	u8 greenfield;	/* 1 for greenfield */
+	u8 mpdu_start_spacing;
+	__le32 basic_rate_set;
+} __packed;
+
+static inline int wsm_set_association_mode(struct cw1200_common *priv,
+					   struct wsm_mib_association_mode *arg)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_SET_ASSOCIATION_MODE, arg,
+			     sizeof(*arg));
+}
+
+#define WSM_TX_RATE_POLICY_FLAG_TERMINATE_WHEN_FINISHED BIT(2)
+#define WSM_TX_RATE_POLICY_FLAG_COUNT_INITIAL_TRANSMIT BIT(3)
+struct wsm_tx_rate_retry_policy {
+	u8 index;
+	u8 short_retries;
+	u8 long_retries;
+	/* BIT(2) - Terminate retries when Tx rate retry policy
+	 *          finishes.
+	 * BIT(3) - Count initial frame transmission as part of
+	 *          rate retry counting but not as a retry
+	 *          attempt */
+	u8 flags;
+	u8 rate_recoveries;
+	u8 reserved[3];
+	__le32 rate_count_indices[3];
+} __packed;
+
+struct wsm_set_tx_rate_retry_policy {
+	u8 num;
+	u8 reserved[3];
+	struct wsm_tx_rate_retry_policy tbl[8];
+} __packed;
+
+static inline int wsm_set_tx_rate_retry_policy(struct cw1200_common *priv,
+				struct wsm_set_tx_rate_retry_policy *arg)
+{
+	size_t size = 4 + arg->num * sizeof(struct wsm_tx_rate_retry_policy);
+	return wsm_write_mib(priv, WSM_MIB_ID_SET_TX_RATE_RETRY_POLICY, arg,
+			     size);
+}
+
+/* 4.32 SetEtherTypeDataFrameFilter */
+struct wsm_ether_type_filter_hdr {
+	u8 num;		/* Up to WSM_MAX_FILTER_ELEMENTS */
+	u8 reserved[3];
+} __packed;
+
+struct wsm_ether_type_filter {
+	u8 action;	/* WSM_FILTER_ACTION_XXX */
+	u8 reserved;
+	__le16 type;	/* Type of ethernet frame */
+} __packed;
+
+static inline int wsm_set_ether_type_filter(struct cw1200_common *priv,
+				struct wsm_ether_type_filter_hdr *arg)
+{
+	size_t size = sizeof(struct wsm_ether_type_filter_hdr) +
+		arg->num * sizeof(struct wsm_ether_type_filter);
+	return wsm_write_mib(priv, WSM_MIB_ID_SET_ETHERTYPE_DATAFRAME_FILTER,
+		arg, size);
+}
+
+/* 4.33 SetUDPPortDataFrameFilter */
+struct wsm_udp_port_filter_hdr {
+	u8 num;		/* Up to WSM_MAX_FILTER_ELEMENTS */
+	u8 reserved[3];
+} __packed;
+
+struct wsm_udp_port_filter {
+	u8 action;	/* WSM_FILTER_ACTION_XXX */
+	u8 type;		/* WSM_FILTER_PORT_TYPE_XXX */
+	__le16 port;		/* Port number */
+} __packed;
+
+static inline int wsm_set_udp_port_filter(struct cw1200_common *priv,
+				struct wsm_udp_port_filter_hdr *arg)
+{
+	size_t size = sizeof(struct wsm_udp_port_filter_hdr) +
+		arg->num * sizeof(struct wsm_udp_port_filter);
+	return wsm_write_mib(priv, WSM_MIB_ID_SET_UDPPORT_DATAFRAME_FILTER,
+		arg, size);
+}
+
+/* Undocumented MIBs: */
+/* 4.35 P2PDeviceInfo */
+#define D11_MAX_SSID_LEN		(32)
+
+struct wsm_p2p_device_type {
+	__le16 categoryId;
+	u8 oui[4];
+	__le16 subCategoryId;
+} __packed;
+
+struct wsm_p2p_device_info {
+	struct wsm_p2p_device_type primaryDevice;
+	u8 reserved1[3];
+	u8 devNameSize;
+	u8 localDevName[D11_MAX_SSID_LEN];
+	u8 reserved2[3];
+	u8 numSecDevSupported;
+	struct wsm_p2p_device_type secondaryDevices[0];
+} __packed;
+
+/* 4.36 SetWCDMABand - WO */
+struct wsm_cdma_band {
+	u8 WCDMA_Band;
+	u8 reserved[3];
+} __packed;
+
+/* 4.37 GroupTxSequenceCounter - RO */
+struct wsm_group_tx_seq {
+	__le32 bits_47_16;
+	__le16 bits_15_00;
+	__le16 reserved;
+} __packed;
+
+/* 4.39 SetHtProtection - WO */
+#define WSM_DUAL_CTS_PROT_ENB		(1 << 0)
+#define WSM_NON_GREENFIELD_STA_PRESENT  (1 << 1)
+#define WSM_HT_PROT_MODE__NO_PROT	(0 << 2)
+#define WSM_HT_PROT_MODE__NON_MEMBER	(1 << 2)
+#define WSM_HT_PROT_MODE__20_MHZ	(2 << 2)
+#define WSM_HT_PROT_MODE__NON_HT_MIXED	(3 << 2)
+#define WSM_LSIG_TXOP_PROT_FULL		(1 << 4)
+#define WSM_LARGE_L_LENGTH_PROT		(1 << 5)
+
+struct wsm_ht_protection {
+	__le32 flags;
+} __packed;
+
+/* 4.40 GPIO Command - R/W */
+#define WSM_GPIO_COMMAND_SETUP	0
+#define WSM_GPIO_COMMAND_READ	1
+#define WSM_GPIO_COMMAND_WRITE	2
+#define WSM_GPIO_COMMAND_RESET	3
+#define WSM_GPIO_ALL_PINS	0xFF
+
+struct wsm_gpio_command {
+	u8 GPIO_Command;
+	u8 pin;
+	__le16 config;
+} __packed;
+
+/* 4.41 TSFCounter - RO */
+struct wsm_tsf_counter {
+	__le64 TSF_Counter;
+} __packed;
+
+/* 4.43 Keep alive period */
+struct wsm_keep_alive_period {
+	__le16 keepAlivePeriod;
+	u8 reserved[2];
+} __packed;
+
+static inline int wsm_keep_alive_period(struct cw1200_common *priv,
+					int period)
+{
+	struct wsm_keep_alive_period arg = {
+		.keepAlivePeriod = __cpu_to_le16(period),
+	};
+	return wsm_write_mib(priv, WSM_MIB_ID_KEEP_ALIVE_PERIOD,
+			&arg, sizeof(arg));
+};
+
+/* BSSID filtering */
+struct wsm_set_bssid_filtering {
+	u8 filter;
+	u8 reserved[3];
+} __packed;
+
+static inline int wsm_set_bssid_filtering(struct cw1200_common *priv,
+					  bool enabled)
+{
+	struct wsm_set_bssid_filtering arg = {
+		.filter = !enabled,
+	};
+	return wsm_write_mib(priv, WSM_MIB_ID_DISABLE_BSSID_FILTER,
+			&arg, sizeof(arg));
+}
+
+/* Multicast filtering - 4.5 */
+struct wsm_mib_multicast_filter {
+	__le32 enable;
+	__le32 num_addrs;
+	u8 macaddrs[WSM_MAX_GRP_ADDRTABLE_ENTRIES][ETH_ALEN];
+} __packed;
+
+static inline int wsm_set_multicast_filter(struct cw1200_common *priv,
+					   struct wsm_mib_multicast_filter *fp)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_DOT11_GROUP_ADDRESSES_TABLE,
+			     fp, sizeof(*fp));
+}
+
+/* ARP IPv4 filtering - 4.10 */
+struct wsm_mib_arp_ipv4_filter {
+	__le32 enable;
+	__be32 ipv4addrs[WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES];
+} __packed;
+
+static inline int wsm_set_arp_ipv4_filter(struct cw1200_common *priv,
+					  struct wsm_mib_arp_ipv4_filter *fp)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_ARP_IP_ADDRESSES_TABLE,
+			    fp, sizeof(*fp));
+}
+
+/* P2P Power Save Mode Info - 4.31 */
+struct wsm_p2p_ps_modeinfo {
+	u8	oppPsCTWindow;
+	u8	count;
+	u8	reserved;
+	u8	dtimCount;
+	__le32	duration;
+	__le32	interval;
+	__le32	startTime;
+} __packed;
+
+static inline int wsm_set_p2p_ps_modeinfo(struct cw1200_common *priv,
+					  struct wsm_p2p_ps_modeinfo *mi)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_P2P_PS_MODE_INFO,
+			     mi, sizeof(*mi));
+}
+
+static inline int wsm_get_p2p_ps_modeinfo(struct cw1200_common *priv,
+					  struct wsm_p2p_ps_modeinfo *mi)
+{
+	return wsm_read_mib(priv, WSM_MIB_ID_P2P_PS_MODE_INFO,
+			    mi, sizeof(*mi));
+}
+
+/* UseMultiTxConfMessage */
+
+static inline int wsm_use_multi_tx_conf(struct cw1200_common *priv,
+					bool enabled)
+{
+	__le32 arg = enabled ? __cpu_to_le32(1) : 0;
+
+	return wsm_write_mib(priv, WSM_MIB_USE_MULTI_TX_CONF,
+			&arg, sizeof(arg));
+}
+
+
+/* 4.26 SetUpasdInformation */
+struct wsm_uapsd_info {
+	__le16 uapsd_flags;
+	__le16 min_auto_trigger_interval;
+	__le16 max_auto_trigger_interval;
+	__le16 auto_trigger_step;
+};
+
+static inline int wsm_set_uapsd_info(struct cw1200_common *priv,
+				     struct wsm_uapsd_info *arg)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_SET_UAPSD_INFORMATION,
+				arg, sizeof(*arg));
+}
+
+/* 4.22 OverrideInternalTxRate */
+struct wsm_override_internal_txrate {
+	u8 internalTxRate;
+	u8 nonErpInternalTxRate;
+	u8 reserved[2];
+} __packed;
+
+static inline int wsm_set_override_internal_txrate(struct cw1200_common *priv,
+				     struct wsm_override_internal_txrate *arg)
+{
+	return wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
+				arg, sizeof(*arg));
+}
+
+/* ******************************************************************** */
+/* WSM TX port control							*/
+
+void wsm_lock_tx(struct cw1200_common *priv);
+void wsm_lock_tx_async(struct cw1200_common *priv);
+bool wsm_flush_tx(struct cw1200_common *priv);
+void wsm_unlock_tx(struct cw1200_common *priv);
+
+/* ******************************************************************** */
+/* WSM / BH API								*/
+
+int wsm_handle_exception(struct cw1200_common *priv, u8 *data, size_t len);
+int wsm_handle_rx(struct cw1200_common *priv, u16 id, struct wsm_hdr *wsm,
+		  struct sk_buff **skb_p);
+
+/* ******************************************************************** */
+/* wsm_buf API								*/
+
+struct wsm_buf {
+	u8 *begin;
+	u8 *data;
+	u8 *end;
+};
+
+void wsm_buf_init(struct wsm_buf *buf);
+void wsm_buf_deinit(struct wsm_buf *buf);
+
+/* ******************************************************************** */
+/* wsm_cmd API								*/
+
+struct wsm_cmd {
+	spinlock_t lock; /* Protect structure from multiple access */
+	int done;
+	u8 *ptr;
+	size_t len;
+	void *arg;
+	int ret;
+	u16 cmd;
+};
+
+/* ******************************************************************** */
+/* WSM TX buffer access							*/
+
+int wsm_get_tx(struct cw1200_common *priv, u8 **data,
+	       size_t *tx_len, int *burst);
+void wsm_txed(struct cw1200_common *priv, u8 *data);
+
+/* ******************************************************************** */
+/* Queue mapping: WSM <---> linux					*/
+/* Linux: VO VI BE BK							*/
+/* WSM:   BE BK VI VO							*/
+
+static inline u8 wsm_queue_id_to_linux(u8 queue_id)
+{
+	static const u8 queue_mapping[] = {
+		2, 3, 1, 0
+	};
+	return queue_mapping[queue_id];
+}
+
+static inline u8 wsm_queue_id_to_wsm(u8 queue_id)
+{
+	static const u8 queue_mapping[] = {
+		3, 2, 0, 1
+	};
+	return queue_mapping[queue_id];
+}
+
+
+#ifdef CONFIG_CW1200_ETF
+int wsm_raw_cmd(struct cw1200_common *priv, u8 *data, size_t len);
+#endif
+
+#endif /* CW1200_HWIO_H_INCLUDED */

include/linux/cw1200_platform.h

+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CW1200_PLAT_H_INCLUDED
+#define CW1200_PLAT_H_INCLUDED
+
+struct cw1200_platform_data_spi {
+	u8 spi_bits_per_word;           /* REQUIRED */
+	u16 ref_clk;                    /* REQUIRED (in KHz) */
+
+	/* All others are optional */
+	bool have_5ghz;
+	const struct resource *reset;   /* GPIO to RSTn signal */
+	const struct resource *powerup; /* GPIO to POWERUP signal */
+	int (*power_ctrl)(const struct cw1200_platform_data_spi *pdata,
+			  bool enable); /* Control 3v3 / 1v8 supply */
+	int (*clk_ctrl)(const struct cw1200_platform_data_spi *pdata,
+			bool enable); /* Control CLK32K */
+	const u8 *macaddr;  /* if NULL, use cw1200_mac_template module parameter */
+	const char *sdd_file;  /* if NULL, will use default for detected hw type */
+};
+
+struct cw1200_platform_data_sdio {
+	u16 ref_clk;                    /* REQUIRED (in KHz) */
+
+	/* All others are optional */
+	const struct resource *irq;     /* if using GPIO for IRQ */
+	bool have_5ghz;
+	bool no_nptb;                   /* SDIO hardware does not support non-power-of-2-blocksizes */
+	const struct resource *reset;   /* GPIO to RSTn signal */
+	const struct resource *powerup; /* GPIO to POWERUP signal */
+	int (*power_ctrl)(const struct cw1200_platform_data_sdio *pdata,
+			  bool enable); /* Control 3v3 / 1v8 supply */
+	int (*clk_ctrl)(const struct cw1200_platform_data_sdio *pdata,
+			bool enable); /* Control CLK32K */
+	const u8 *macaddr;  /* if NULL, use cw1200_mac_template module parameter */
+	const char *sdd_file;  /* if NULL, will use default for detected hw type */
+};
+
+const void *cw1200_get_platform_data(void);
+
+#endif /* CW1200_PLAT_H_INCLUDED */