Commit b40b15e1 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Kalle Valo

mt76: add usb support to mt76 layer

This will be used by drivers for MT76x2u based devices

Tested-by: <cug_yangyuancong@hotmail.com>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 03780400
config MT76_CORE
tristate
config MT76_USB
tristate
depends on MT76_CORE
config MT76x2_COMMON
tristate
depends on MT76_CORE
......
obj-$(CONFIG_MT76_CORE) += mt76.o
obj-$(CONFIG_MT76_USB) += mt76-usb.o
obj-$(CONFIG_MT76x2_COMMON) += mt76x2-common.o
obj-$(CONFIG_MT76x2E) += mt76x2e.o
mt76-y := \
mmio.o util.o trace.o dma.o mac80211.o debugfs.o eeprom.o tx.o agg-rx.o
mt76-usb-y := usb.o usb_trace.o usb_mcu.o
CFLAGS_trace.o := -I$(src)
CFLAGS_usb_trace.o := -I$(src)
mt76x2-common-y := \
mt76x2_eeprom.o mt76x2_tx_common.o mt76x2_mac_common.o \
......
......@@ -53,6 +53,11 @@
#define MT_MCU_MSG_TYPE GENMASK(31, 30)
#define MT_MCU_MSG_TYPE_CMD BIT(30)
#define MT_DMA_HDR_LEN 4
#define MT_RX_INFO_LEN 4
#define MT_FCE_INFO_LEN 4
#define MT_RX_RXWI_LEN 32
struct mt76_desc {
__le32 buf0;
__le32 ctrl;
......
......@@ -22,6 +22,7 @@
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/leds.h>
#include <linux/usb.h>
#include <net/mac80211.h>
#include "util.h"
......@@ -63,12 +64,22 @@ struct mt76_queue_buf {
int len;
};
struct mt76u_buf {
struct mt76_dev *dev;
struct urb *urb;
size_t len;
bool done;
};
struct mt76_queue_entry {
union {
void *buf;
struct sk_buff *skb;
};
union {
struct mt76_txwi_cache *txwi;
struct mt76u_buf ubuf;
};
bool schedule;
};
......@@ -89,6 +100,7 @@ struct mt76_queue {
struct list_head swq;
int swq_queued;
u16 first;
u16 head;
u16 tail;
int ndesc;
......@@ -195,6 +207,8 @@ enum {
MT76_SCANNING,
MT76_RESET,
MT76_OFFCHANNEL,
MT76_REMOVED,
MT76_READING_STATS,
};
struct mt76_hw_cap {
......@@ -215,6 +229,8 @@ struct mt76_driver_ops {
void (*tx_complete_skb)(struct mt76_dev *dev, struct mt76_queue *q,
struct mt76_queue_entry *e, bool flush);
bool (*tx_status_data)(struct mt76_dev *dev, u8 *update);
void (*rx_skb)(struct mt76_dev *dev, enum mt76_rxq_id q,
struct sk_buff *skb);
......@@ -234,6 +250,64 @@ struct mt76_sband {
struct mt76_channel_state *chan;
};
/* addr req mask */
#define MT_VEND_TYPE_EEPROM BIT(31)
#define MT_VEND_TYPE_CFG BIT(30)
#define MT_VEND_TYPE_MASK (MT_VEND_TYPE_EEPROM | MT_VEND_TYPE_CFG)
#define MT_VEND_ADDR(type, n) (MT_VEND_TYPE_##type | (n))
enum mt_vendor_req {
MT_VEND_DEV_MODE = 0x1,
MT_VEND_WRITE = 0x2,
MT_VEND_MULTI_WRITE = 0x6,
MT_VEND_MULTI_READ = 0x7,
MT_VEND_READ_EEPROM = 0x9,
MT_VEND_WRITE_FCE = 0x42,
MT_VEND_WRITE_CFG = 0x46,
MT_VEND_READ_CFG = 0x47,
};
enum mt76u_in_ep {
MT_EP_IN_PKT_RX,
MT_EP_IN_CMD_RESP,
__MT_EP_IN_MAX,
};
enum mt76u_out_ep {
MT_EP_OUT_INBAND_CMD,
MT_EP_OUT_AC_BK,
MT_EP_OUT_AC_BE,
MT_EP_OUT_AC_VI,
MT_EP_OUT_AC_VO,
MT_EP_OUT_HCCA,
__MT_EP_OUT_MAX,
};
#define MT_SG_MAX_SIZE 8
#define MT_NUM_TX_ENTRIES 256
#define MT_NUM_RX_ENTRIES 128
#define MCU_RESP_URB_SIZE 1024
struct mt76_usb {
struct mutex usb_ctrl_mtx;
u8 data[32];
struct tasklet_struct rx_tasklet;
struct tasklet_struct tx_tasklet;
struct delayed_work stat_work;
u8 out_ep[__MT_EP_OUT_MAX];
u16 out_max_packet;
u8 in_ep[__MT_EP_IN_MAX];
u16 in_max_packet;
struct mt76u_mcu {
struct mutex mutex;
struct completion cmpl;
struct mt76u_buf res;
u32 msg_seq;
} mcu;
};
struct mt76_dev {
struct ieee80211_hw *hw;
struct cfg80211_chan_def chandef;
......@@ -276,6 +350,8 @@ struct mt76_dev {
char led_name[32];
bool led_al;
u8 led_pin;
struct mt76_usb usb;
};
enum mt76_phy_type {
......@@ -407,6 +483,14 @@ static inline int mt76_decr(int val, int size)
return (val - 1) & (size - 1);
}
/* Hardware uses mirrored order of queues with Q3
* having the highest priority
*/
static inline u8 q2hwq(u8 q)
{
return q ^ 0x3;
}
static inline struct ieee80211_txq *
mtxq_to_txq(struct mt76_txq *mtxq)
{
......@@ -467,4 +551,61 @@ void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q,
struct napi_struct *napi);
void mt76_rx_aggr_reorder(struct sk_buff *skb, struct sk_buff_head *frames);
/* usb */
static inline bool mt76u_urb_error(struct urb *urb)
{
return urb->status &&
urb->status != -ECONNRESET &&
urb->status != -ESHUTDOWN &&
urb->status != -ENOENT;
}
/* Map hardware queues to usb endpoints */
static inline u8 q2ep(u8 qid)
{
/* TODO: take management packets to queue 5 */
return qid + 1;
}
static inline bool mt76u_check_sg(struct mt76_dev *dev)
{
struct usb_interface *intf = to_usb_interface(dev->dev);
struct usb_device *udev = interface_to_usbdev(intf);
return (udev->bus->sg_tablesize > 0 &&
(udev->bus->no_sg_constraint ||
udev->speed == USB_SPEED_WIRELESS));
}
int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
u8 req_type, u16 val, u16 offset,
void *buf, size_t len);
void mt76u_single_wr(struct mt76_dev *dev, const u8 req,
const u16 offset, const u32 val);
u32 mt76u_rr(struct mt76_dev *dev, u32 addr);
void mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val);
int mt76u_init(struct mt76_dev *dev, struct usb_interface *intf);
void mt76u_deinit(struct mt76_dev *dev);
int mt76u_buf_alloc(struct mt76_dev *dev, struct mt76u_buf *buf,
int nsgs, int len, int sglen, gfp_t gfp);
void mt76u_buf_free(struct mt76u_buf *buf);
int mt76u_submit_buf(struct mt76_dev *dev, int dir, int index,
struct mt76u_buf *buf, gfp_t gfp,
usb_complete_t complete_fn, void *context);
int mt76u_submit_rx_buffers(struct mt76_dev *dev);
int mt76u_alloc_queues(struct mt76_dev *dev);
void mt76u_stop_queues(struct mt76_dev *dev);
void mt76u_stop_stat_wk(struct mt76_dev *dev);
void mt76u_queues_deinit(struct mt76_dev *dev);
int mt76u_skb_dma_info(struct sk_buff *skb, int port, u32 flags);
int mt76u_mcu_fw_send_data(struct mt76_dev *dev, const void *data,
int data_len, u32 max_payload, u32 offset);
void mt76u_mcu_complete_urb(struct urb *urb);
struct sk_buff *mt76u_mcu_msg_alloc(const void *data, int len);
int mt76u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
int cmd, bool wait_resp);
void mt76u_mcu_fw_reset(struct mt76_dev *dev);
int mt76u_mcu_init_rx(struct mt76_dev *dev);
#endif
This diff is collapsed.
/*
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/firmware.h>
#include "mt76.h"
#include "dma.h"
#define MT_CMD_HDR_LEN 4
#define MT_FCE_DMA_ADDR 0x0230
#define MT_FCE_DMA_LEN 0x0234
#define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8
struct sk_buff *mt76u_mcu_msg_alloc(const void *data, int len)
{
struct sk_buff *skb;
skb = alloc_skb(MT_CMD_HDR_LEN + len + 8, GFP_KERNEL);
if (!skb)
return NULL;
skb_reserve(skb, MT_CMD_HDR_LEN);
skb_put_data(skb, data, len);
return skb;
}
EXPORT_SYMBOL_GPL(mt76u_mcu_msg_alloc);
void mt76u_mcu_complete_urb(struct urb *urb)
{
struct completion *cmpl = urb->context;
complete(cmpl);
}
EXPORT_SYMBOL_GPL(mt76u_mcu_complete_urb);
static int mt76u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
{
struct mt76_usb *usb = &dev->usb;
struct mt76u_buf *buf = &usb->mcu.res;
int i, ret;
u32 rxfce;
for (i = 0; i < 5; i++) {
if (!wait_for_completion_timeout(&usb->mcu.cmpl,
msecs_to_jiffies(300)))
continue;
if (buf->urb->status)
return -EIO;
rxfce = get_unaligned_le32(sg_virt(&buf->urb->sg[0]));
ret = mt76u_submit_buf(dev, USB_DIR_IN,
MT_EP_IN_CMD_RESP,
buf, GFP_KERNEL,
mt76u_mcu_complete_urb,
&usb->mcu.cmpl);
if (ret)
return ret;
if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce))
return 0;
dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",
FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),
seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));
}
dev_err(dev->dev, "error: %s timed out\n", __func__);
return -ETIMEDOUT;
}
int mt76u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
int cmd, bool wait_resp)
{
struct usb_interface *intf = to_usb_interface(dev->dev);
struct usb_device *udev = interface_to_usbdev(intf);
struct mt76_usb *usb = &dev->usb;
unsigned int pipe;
int ret, sent;
u8 seq = 0;
u32 info;
if (test_bit(MT76_REMOVED, &dev->state))
return 0;
mutex_lock(&usb->mcu.mutex);
pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
if (wait_resp) {
seq = ++usb->mcu.msg_seq & 0xf;
if (!seq)
seq = ++usb->mcu.msg_seq & 0xf;
}
info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
MT_MCU_MSG_TYPE_CMD;
ret = mt76u_skb_dma_info(skb, CPU_TX_PORT, info);
if (ret)
goto out;
ret = usb_bulk_msg(udev, pipe, skb->data, skb->len, &sent, 500);
if (ret)
goto out;
if (wait_resp)
ret = mt76u_mcu_wait_resp(dev, seq);
out:
mutex_unlock(&usb->mcu.mutex);
consume_skb(skb);
return ret;
}
EXPORT_SYMBOL_GPL(mt76u_mcu_send_msg);
void mt76u_mcu_fw_reset(struct mt76_dev *dev)
{
mt76u_vendor_request(dev, MT_VEND_DEV_MODE,
USB_DIR_OUT | USB_TYPE_VENDOR,
0x1, 0, NULL, 0);
}
EXPORT_SYMBOL_GPL(mt76u_mcu_fw_reset);
static int
__mt76u_mcu_fw_send_data(struct mt76_dev *dev, struct mt76u_buf *buf,
const void *fw_data, int len, u32 dst_addr)
{
u8 *data = sg_virt(&buf->urb->sg[0]);
DECLARE_COMPLETION_ONSTACK(cmpl);
__le32 info;
u32 val;
int err;
info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
FIELD_PREP(MT_MCU_MSG_LEN, len) |
MT_MCU_MSG_TYPE_CMD);
memcpy(data, &info, sizeof(info));
memcpy(data + sizeof(info), fw_data, len);
memset(data + sizeof(info) + len, 0, 4);
mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
MT_FCE_DMA_ADDR, dst_addr);
len = roundup(len, 4);
mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
MT_FCE_DMA_LEN, len << 16);
buf->len = MT_CMD_HDR_LEN + len + sizeof(info);
err = mt76u_submit_buf(dev, USB_DIR_OUT,
MT_EP_OUT_INBAND_CMD,
buf, GFP_KERNEL,
mt76u_mcu_complete_urb, &cmpl);
if (err < 0)
return err;
if (!wait_for_completion_timeout(&cmpl,
msecs_to_jiffies(1000))) {
dev_err(dev->dev, "firmware upload timed out\n");
usb_kill_urb(buf->urb);
return -ETIMEDOUT;
}
if (mt76u_urb_error(buf->urb)) {
dev_err(dev->dev, "firmware upload failed: %d\n",
buf->urb->status);
return buf->urb->status;
}
val = mt76u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
val++;
mt76u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
return 0;
}
int mt76u_mcu_fw_send_data(struct mt76_dev *dev, const void *data,
int data_len, u32 max_payload, u32 offset)
{
int err, len, pos = 0, max_len = max_payload - 8;
struct mt76u_buf buf;
err = mt76u_buf_alloc(dev, &buf, 1, max_payload, max_payload,
GFP_KERNEL);
if (err < 0)
return err;
while (data_len > 0) {
len = min_t(int, data_len, max_len);
err = __mt76u_mcu_fw_send_data(dev, &buf, data + pos,
len, offset + pos);
if (err < 0)
break;
data_len -= len;
pos += len;
usleep_range(5000, 10000);
}
mt76u_buf_free(&buf);
return err;
}
EXPORT_SYMBOL_GPL(mt76u_mcu_fw_send_data);
int mt76u_mcu_init_rx(struct mt76_dev *dev)
{
struct mt76_usb *usb = &dev->usb;
int err;
err = mt76u_buf_alloc(dev, &usb->mcu.res, 1,
MCU_RESP_URB_SIZE, MCU_RESP_URB_SIZE,
GFP_KERNEL);
if (err < 0)
return err;
err = mt76u_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
&usb->mcu.res, GFP_KERNEL,
mt76u_mcu_complete_urb,
&usb->mcu.cmpl);
if (err < 0)
mt76u_buf_free(&usb->mcu.res);
return err;
}
EXPORT_SYMBOL_GPL(mt76u_mcu_init_rx);
/*
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/module.h>
#ifndef __CHECKER__
#define CREATE_TRACE_POINTS
#include "usb_trace.h"
#endif
/*
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#if !defined(__MT76_USB_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define __MT76_USB_TRACE_H
#include <linux/tracepoint.h>
#include "mt76.h"
#undef TRACE_SYSTEM
#define TRACE_SYSTEM mt76_usb
#define MAXNAME 32
#define DEV_ENTRY __array(char, wiphy_name, 32)
#define DEV_ASSIGN strlcpy(__entry->wiphy_name, wiphy_name(dev->hw->wiphy), MAXNAME)
#define DEV_PR_FMT "%s"
#define DEV_PR_ARG __entry->wiphy_name
#define REG_ENTRY __field(u32, reg) __field(u32, val)
#define REG_ASSIGN __entry->reg = reg; __entry->val = val
#define REG_PR_FMT " %04x=%08x"
#define REG_PR_ARG __entry->reg, __entry->val
DECLARE_EVENT_CLASS(dev_reg_evt,
TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val),
TP_ARGS(dev, reg, val),
TP_STRUCT__entry(
DEV_ENTRY
REG_ENTRY
),
TP_fast_assign(
DEV_ASSIGN;
REG_ASSIGN;
),
TP_printk(
DEV_PR_FMT REG_PR_FMT,
DEV_PR_ARG, REG_PR_ARG
)
);
DEFINE_EVENT(dev_reg_evt, usb_reg_rr,
TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val),
TP_ARGS(dev, reg, val)
);
DEFINE_EVENT(dev_reg_evt, usb_reg_wr,
TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val),
TP_ARGS(dev, reg, val)
);
#endif
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE usb_trace
#include <trace/define_trace.h>
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