b43: AC-PHY: prepare place for developing new PHY support

There are new (not anymore?) Broadcom 802.11ac wireless cards based on
chipsets like BCM4352 and BCM4360. They use a new PHY type (called
simply AC) that will require new specific code.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/b43/Kconfig

@@ -166,6 +166,15 @@ config B43_PHY_LCN
 
 	  Say N, this is BROKEN and crashes driver.
 
+config B43_PHY_AC
+	bool "Support for AC-PHY (802.11ac) devices (BROKEN)"
+	depends on B43 && B43_BCMA && BROKEN
+	---help---
+	  This PHY type can be found in the following chipsets:
+	  PCI: BCM4352, BCM4360
+
+	  Say N, this is BROKEN and crashes driver.
+
 # This config option automatically enables b43 LEDS support,
 # if it's possible.
 config B43_LEDS

drivers/net/wireless/b43/Makefile

@@ -13,6 +13,7 @@ b43-$(CONFIG_B43_PHY_HT)	+= phy_ht.o
 b43-$(CONFIG_B43_PHY_HT)	+= tables_phy_ht.o
 b43-$(CONFIG_B43_PHY_HT)	+= radio_2059.o
 b43-$(CONFIG_B43_PHY_LCN)	+= phy_lcn.o tables_phy_lcn.o
+b43-$(CONFIG_B43_PHY_AC)	+= phy_ac.o
 b43-y				+= sysfs.o
 b43-y				+= xmit.o
 b43-y				+= dma.o

drivers/net/wireless/b43/main.c

@@ -4543,6 +4543,12 @@ static int b43_phy_versioning(struct b43_wldev *dev)
 		if (phy_rev > 1)
 			unsupported = 1;
 		break;
+#endif
+#ifdef CONFIG_B43_PHY_AC
+	case B43_PHYTYPE_AC:
+		if (phy_rev > 1)
+			unsupported = 1;
+		break;
 #endif
 	default:
 		unsupported = 1;
@@ -4640,6 +4646,10 @@ static int b43_phy_versioning(struct b43_wldev *dev)
 		if (radio_id != 0x2064)
 			unsupported = 1;
 		break;
+	case B43_PHYTYPE_AC:
+		if (radio_id != 0x2069)
+			unsupported = 1;
+		break;
 	default:
 		B43_WARN_ON(1);
 	}

drivers/net/wireless/b43/phy_ac.c

+/*
+ * Broadcom B43 wireless driver
+ * IEEE 802.11ac AC-PHY support
+ *
+ * Copyright (c) 2015 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * This program is free software; you can redistribute	it and/or modify it
+ * under  the terms of	the GNU General	 Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include "b43.h"
+#include "phy_ac.h"
+
+/**************************************************
+ * Basic PHY ops
+ **************************************************/
+
+static int b43_phy_ac_op_allocate(struct b43_wldev *dev)
+{
+	struct b43_phy_ac *phy_ac;
+
+	phy_ac = kzalloc(sizeof(*phy_ac), GFP_KERNEL);
+	if (!phy_ac)
+		return -ENOMEM;
+	dev->phy.ac = phy_ac;
+
+	return 0;
+}
+
+static void b43_phy_ac_op_free(struct b43_wldev *dev)
+{
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_ac *phy_ac = phy->ac;
+
+	kfree(phy_ac);
+	phy->ac = NULL;
+}
+
+static void b43_phy_ac_op_maskset(struct b43_wldev *dev, u16 reg, u16 mask,
+				  u16 set)
+{
+	b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
+	b43_write16(dev, B43_MMIO_PHY_DATA,
+		    (b43_read16(dev, B43_MMIO_PHY_DATA) & mask) | set);
+}
+
+static u16 b43_phy_ac_op_radio_read(struct b43_wldev *dev, u16 reg)
+{
+	b43_write16f(dev, B43_MMIO_RADIO24_CONTROL, reg);
+	return b43_read16(dev, B43_MMIO_RADIO24_DATA);
+}
+
+static void b43_phy_ac_op_radio_write(struct b43_wldev *dev, u16 reg,
+				      u16 value)
+{
+	b43_write16f(dev, B43_MMIO_RADIO24_CONTROL, reg);
+	b43_write16(dev, B43_MMIO_RADIO24_DATA, value);
+}
+
+static unsigned int b43_phy_ac_op_get_default_chan(struct b43_wldev *dev)
+{
+	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
+		return 11;
+	return 36;
+}
+
+static enum b43_txpwr_result
+b43_phy_ac_op_recalc_txpower(struct b43_wldev *dev, bool ignore_tssi)
+{
+	return B43_TXPWR_RES_DONE;
+}
+
+static void b43_phy_ac_op_adjust_txpower(struct b43_wldev *dev)
+{
+}
+
+/**************************************************
+ * PHY ops struct
+ **************************************************/
+
+const struct b43_phy_operations b43_phyops_ac = {
+	.allocate		= b43_phy_ac_op_allocate,
+	.free			= b43_phy_ac_op_free,
+	.phy_maskset		= b43_phy_ac_op_maskset,
+	.radio_read		= b43_phy_ac_op_radio_read,
+	.radio_write		= b43_phy_ac_op_radio_write,
+	.get_default_chan	= b43_phy_ac_op_get_default_chan,
+	.recalc_txpower		= b43_phy_ac_op_recalc_txpower,
+	.adjust_txpower		= b43_phy_ac_op_adjust_txpower,
+};

drivers/net/wireless/b43/phy_ac.h

+#ifndef B43_PHY_AC_H_
+#define B43_PHY_AC_H_
+
+#include "phy_common.h"
+
+#define B43_PHY_AC_BBCFG			0x001
+#define  B43_PHY_AC_BBCFG_RSTCCA		0x4000	/* Reset CCA */
+#define B43_PHY_AC_BANDCTL			0x003	/* Band control */
+#define  B43_PHY_AC_BANDCTL_5GHZ		0x0001
+#define B43_PHY_AC_TABLE_ID			0x00d
+#define B43_PHY_AC_TABLE_OFFSET			0x00e
+#define B43_PHY_AC_TABLE_DATA1			0x00f
+#define B43_PHY_AC_TABLE_DATA2			0x010
+#define B43_PHY_AC_TABLE_DATA3			0x011
+#define B43_PHY_AC_CLASSCTL			0x140	/* Classifier control */
+#define  B43_PHY_AC_CLASSCTL_CCKEN		0x0001	/* CCK enable */
+#define  B43_PHY_AC_CLASSCTL_OFDMEN		0x0002	/* OFDM enable */
+#define  B43_PHY_AC_CLASSCTL_WAITEDEN		0x0004	/* Waited enable */
+#define B43_PHY_AC_BW1A				0x371
+#define B43_PHY_AC_BW2				0x372
+#define B43_PHY_AC_BW3				0x373
+#define B43_PHY_AC_BW4				0x374
+#define B43_PHY_AC_BW5				0x375
+#define B43_PHY_AC_BW6				0x376
+#define B43_PHY_AC_RFCTL_CMD			0x408
+#define B43_PHY_AC_C1_CLIP			0x6d4
+#define  B43_PHY_AC_C1_CLIP_DIS			0x4000
+#define B43_PHY_AC_C2_CLIP			0x8d4
+#define  B43_PHY_AC_C2_CLIP_DIS			0x4000
+#define B43_PHY_AC_C3_CLIP			0xad4
+#define  B43_PHY_AC_C3_CLIP_DIS			0x4000
+
+struct b43_phy_ac {
+};
+
+extern const struct b43_phy_operations b43_phyops_ac;
+
+#endif /* B43_PHY_AC_H_ */

drivers/net/wireless/b43/phy_common.c

@@ -33,6 +33,7 @@
 #include "phy_lp.h"
 #include "phy_ht.h"
 #include "phy_lcn.h"
+#include "phy_ac.h"
 #include "b43.h"
 #include "main.h"
 
@@ -68,6 +69,11 @@ int b43_phy_allocate(struct b43_wldev *dev)
 	case B43_PHYTYPE_LCN:
 #ifdef CONFIG_B43_PHY_LCN
 		phy->ops = &b43_phyops_lcn;
+#endif
+		break;
+	case B43_PHYTYPE_AC:
+#ifdef CONFIG_B43_PHY_AC
+		phy->ops = &b43_phyops_ac;
 #endif
 		break;
 	}
@@ -572,7 +578,8 @@ void b43_phy_force_clock(struct b43_wldev *dev, bool force)
 	u32 tmp;
 
 	WARN_ON(dev->phy.type != B43_PHYTYPE_N &&
-		dev->phy.type != B43_PHYTYPE_HT);
+		dev->phy.type != B43_PHYTYPE_HT &&
+		dev->phy.type != B43_PHYTYPE_AC);
 
 	switch (dev->dev->bus_type) {
 #ifdef CONFIG_B43_BCMA

drivers/net/wireless/b43/phy_common.h

@@ -222,6 +222,8 @@ struct b43_phy {
 		struct b43_phy_ht *ht;
 		/* LCN-PHY specific information */
 		struct b43_phy_lcn *lcn;
+		/* AC-PHY specific information */
+		struct b43_phy_ac *ac;
 	};
 
 	/* Band support flags. */