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linuxdebug/drivers/net/wireless/mediatek/mt7601u/mcu.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* (c) Copyright 2002-2010, Ralink Technology, Inc.
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
*/
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/usb.h>
#include <linux/skbuff.h>
#include "mt7601u.h"
#include "dma.h"
#include "mcu.h"
#include "usb.h"
#include "trace.h"
#define MCU_FW_URB_MAX_PAYLOAD 0x3800
#define MCU_FW_URB_SIZE (MCU_FW_URB_MAX_PAYLOAD + 12)
#define MCU_RESP_URB_SIZE 1024
static inline int firmware_running(struct mt7601u_dev *dev)
{
return mt7601u_rr(dev, MT_MCU_COM_REG0) == 1;
}
static inline void skb_put_le32(struct sk_buff *skb, u32 val)
{
put_unaligned_le32(val, skb_put(skb, 4));
}
static inline void mt7601u_dma_skb_wrap_cmd(struct sk_buff *skb,
u8 seq, enum mcu_cmd cmd)
{
WARN_ON(mt7601u_dma_skb_wrap(skb, CPU_TX_PORT, DMA_COMMAND,
FIELD_PREP(MT_TXD_CMD_INFO_SEQ, seq) |
FIELD_PREP(MT_TXD_CMD_INFO_TYPE, cmd)));
}
static inline void trace_mt_mcu_msg_send_cs(struct mt7601u_dev *dev,
struct sk_buff *skb, bool need_resp)
{
u32 i, csum = 0;
for (i = 0; i < skb->len / 4; i++)
csum ^= get_unaligned_le32(skb->data + i * 4);
trace_mt_mcu_msg_send(dev, skb, csum, need_resp);
}
static struct sk_buff *mt7601u_mcu_msg_alloc(const void *data, int len)
{
struct sk_buff *skb;
WARN_ON(len % 4); /* if length is not divisible by 4 we need to pad */
skb = alloc_skb(len + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
if (skb) {
skb_reserve(skb, MT_DMA_HDR_LEN);
skb_put_data(skb, data, len);
}
return skb;
}
static int mt7601u_mcu_wait_resp(struct mt7601u_dev *dev, u8 seq)
{
struct urb *urb = dev->mcu.resp.urb;
u32 rxfce;
int urb_status, ret, i = 5;
while (i--) {
if (!wait_for_completion_timeout(&dev->mcu.resp_cmpl,
msecs_to_jiffies(300))) {
dev_warn(dev->dev, "Warning: %s retrying\n", __func__);
continue;
}
/* Make copies of important data before reusing the urb */
rxfce = get_unaligned_le32(dev->mcu.resp.buf);
urb_status = urb->status * mt7601u_urb_has_error(urb);
ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
&dev->mcu.resp, GFP_KERNEL,
mt7601u_complete_urb,
&dev->mcu.resp_cmpl);
if (ret)
return ret;
if (urb_status)
dev_err(dev->dev, "Error: MCU resp urb failed:%d\n",
urb_status);
if (FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce) == seq &&
FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce) == CMD_DONE)
return 0;
dev_err(dev->dev, "Error: MCU resp evt:%lx seq:%hhx-%lx!\n",
FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce),
seq, FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce));
}
dev_err(dev->dev, "Error: %s timed out\n", __func__);
return -ETIMEDOUT;
}
static int
mt7601u_mcu_msg_send(struct mt7601u_dev *dev, struct sk_buff *skb,
enum mcu_cmd cmd, bool wait_resp)
{
struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
unsigned cmd_pipe = usb_sndbulkpipe(usb_dev,
dev->out_eps[MT_EP_OUT_INBAND_CMD]);
int sent, ret;
u8 seq = 0;
if (test_bit(MT7601U_STATE_REMOVED, &dev->state)) {
consume_skb(skb);
return 0;
}
mutex_lock(&dev->mcu.mutex);
if (wait_resp)
while (!seq)
seq = ++dev->mcu.msg_seq & 0xf;
mt7601u_dma_skb_wrap_cmd(skb, seq, cmd);
if (dev->mcu.resp_cmpl.done)
dev_err(dev->dev, "Error: MCU response pre-completed!\n");
trace_mt_mcu_msg_send_cs(dev, skb, wait_resp);
trace_mt_submit_urb_sync(dev, cmd_pipe, skb->len);
ret = usb_bulk_msg(usb_dev, cmd_pipe, skb->data, skb->len, &sent, 500);
if (ret) {
dev_err(dev->dev, "Error: send MCU cmd failed:%d\n", ret);
goto out;
}
if (sent != skb->len)
dev_err(dev->dev, "Error: %s sent != skb->len\n", __func__);
if (wait_resp)
ret = mt7601u_mcu_wait_resp(dev, seq);
out:
mutex_unlock(&dev->mcu.mutex);
consume_skb(skb);
return ret;
}
static int mt7601u_mcu_function_select(struct mt7601u_dev *dev,
enum mcu_function func, u32 val)
{
struct sk_buff *skb;
struct {
__le32 id;
__le32 value;
} __packed __aligned(4) msg = {
.id = cpu_to_le32(func),
.value = cpu_to_le32(val),
};
skb = mt7601u_mcu_msg_alloc(&msg, sizeof(msg));
if (!skb)
return -ENOMEM;
return mt7601u_mcu_msg_send(dev, skb, CMD_FUN_SET_OP, func == 5);
}
int mt7601u_mcu_tssi_read_kick(struct mt7601u_dev *dev, int use_hvga)
{
int ret;
if (!test_bit(MT7601U_STATE_MCU_RUNNING, &dev->state))
return 0;
ret = mt7601u_mcu_function_select(dev, ATOMIC_TSSI_SETTING,
use_hvga);
if (ret) {
dev_warn(dev->dev, "Warning: MCU TSSI read kick failed\n");
return ret;
}
dev->tssi_read_trig = true;
return 0;
}
int
mt7601u_mcu_calibrate(struct mt7601u_dev *dev, enum mcu_calibrate cal, u32 val)
{
struct sk_buff *skb;
struct {
__le32 id;
__le32 value;
} __packed __aligned(4) msg = {
.id = cpu_to_le32(cal),
.value = cpu_to_le32(val),
};
skb = mt7601u_mcu_msg_alloc(&msg, sizeof(msg));
if (!skb)
return -ENOMEM;
return mt7601u_mcu_msg_send(dev, skb, CMD_CALIBRATION_OP, true);
}
int mt7601u_write_reg_pairs(struct mt7601u_dev *dev, u32 base,
const struct mt76_reg_pair *data, int n)
{
const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 8;
struct sk_buff *skb;
int cnt, i, ret;
if (!n)
return 0;
cnt = min(max_vals_per_cmd, n);
skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_reserve(skb, MT_DMA_HDR_LEN);
for (i = 0; i < cnt; i++) {
skb_put_le32(skb, base + data[i].reg);
skb_put_le32(skb, data[i].value);
}
ret = mt7601u_mcu_msg_send(dev, skb, CMD_RANDOM_WRITE, cnt == n);
if (ret)
return ret;
return mt7601u_write_reg_pairs(dev, base, data + cnt, n - cnt);
}
int mt7601u_burst_write_regs(struct mt7601u_dev *dev, u32 offset,
const u32 *data, int n)
{
const int max_regs_per_cmd = INBAND_PACKET_MAX_LEN / 4 - 1;
struct sk_buff *skb;
int cnt, i, ret;
if (!n)
return 0;
cnt = min(max_regs_per_cmd, n);
skb = alloc_skb(cnt * 4 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_reserve(skb, MT_DMA_HDR_LEN);
skb_put_le32(skb, MT_MCU_MEMMAP_WLAN + offset);
for (i = 0; i < cnt; i++)
skb_put_le32(skb, data[i]);
ret = mt7601u_mcu_msg_send(dev, skb, CMD_BURST_WRITE, cnt == n);
if (ret)
return ret;
return mt7601u_burst_write_regs(dev, offset + cnt * 4,
data + cnt, n - cnt);
}
struct mt76_fw_header {
__le32 ilm_len;
__le32 dlm_len;
__le16 build_ver;
__le16 fw_ver;
u8 pad[4];
char build_time[16];
};
struct mt76_fw {
struct mt76_fw_header hdr;
u8 ivb[MT_MCU_IVB_SIZE];
u8 ilm[];
};
static int __mt7601u_dma_fw(struct mt7601u_dev *dev,
const struct mt7601u_dma_buf *dma_buf,
const void *data, u32 len, u32 dst_addr)
{
DECLARE_COMPLETION_ONSTACK(cmpl);
struct mt7601u_dma_buf buf = *dma_buf; /* we need to fake length */
__le32 reg;
u32 val;
int ret;
reg = cpu_to_le32(FIELD_PREP(MT_TXD_INFO_TYPE, DMA_PACKET) |
FIELD_PREP(MT_TXD_INFO_D_PORT, CPU_TX_PORT) |
FIELD_PREP(MT_TXD_INFO_LEN, len));
memcpy(buf.buf, &reg, sizeof(reg));
memcpy(buf.buf + sizeof(reg), data, len);
memset(buf.buf + sizeof(reg) + len, 0, 8);
ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
MT_FCE_DMA_ADDR, dst_addr);
if (ret)
return ret;
len = roundup(len, 4);
ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
MT_FCE_DMA_LEN, len << 16);
if (ret)
return ret;
buf.len = MT_DMA_HDR_LEN + len + 4;
ret = mt7601u_usb_submit_buf(dev, USB_DIR_OUT, MT_EP_OUT_INBAND_CMD,
&buf, GFP_KERNEL,
mt7601u_complete_urb, &cmpl);
if (ret)
return ret;
if (!wait_for_completion_timeout(&cmpl, msecs_to_jiffies(1000))) {
dev_err(dev->dev, "Error: firmware upload timed out\n");
usb_kill_urb(buf.urb);
return -ETIMEDOUT;
}
if (mt7601u_urb_has_error(buf.urb)) {
dev_err(dev->dev, "Error: firmware upload urb failed:%d\n",
buf.urb->status);
return buf.urb->status;
}
val = mt7601u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
val++;
mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
return 0;
}
static int
mt7601u_dma_fw(struct mt7601u_dev *dev, struct mt7601u_dma_buf *dma_buf,
const void *data, int len, u32 dst_addr)
{
int n, ret;
if (len == 0)
return 0;
n = min(MCU_FW_URB_MAX_PAYLOAD, len);
ret = __mt7601u_dma_fw(dev, dma_buf, data, n, dst_addr);
if (ret)
return ret;
if (!mt76_poll_msec(dev, MT_MCU_COM_REG1, BIT(31), BIT(31), 500))
return -ETIMEDOUT;
return mt7601u_dma_fw(dev, dma_buf, data + n, len - n, dst_addr + n);
}
static int
mt7601u_upload_firmware(struct mt7601u_dev *dev, const struct mt76_fw *fw)
{
struct mt7601u_dma_buf dma_buf;
void *ivb;
u32 ilm_len, dlm_len;
int i, ret;
ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL);
if (!ivb)
return -ENOMEM;
if (mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) {
ret = -ENOMEM;
goto error;
}
ilm_len = le32_to_cpu(fw->hdr.ilm_len) - sizeof(fw->ivb);
dev_dbg(dev->dev, "loading FW - ILM %u + IVB %zu\n",
ilm_len, sizeof(fw->ivb));
ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm, ilm_len, sizeof(fw->ivb));
if (ret)
goto error;
dlm_len = le32_to_cpu(fw->hdr.dlm_len);
dev_dbg(dev->dev, "loading FW - DLM %u\n", dlm_len);
ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm + ilm_len,
dlm_len, MT_MCU_DLM_OFFSET);
if (ret)
goto error;
ret = mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
0x12, 0, ivb, sizeof(fw->ivb));
if (ret < 0)
goto error;
ret = 0;
for (i = 100; i && !firmware_running(dev); i--)
msleep(10);
if (!i) {
ret = -ETIMEDOUT;
goto error;
}
dev_dbg(dev->dev, "Firmware running!\n");
error:
kfree(ivb);
mt7601u_usb_free_buf(dev, &dma_buf);
return ret;
}
static int mt7601u_load_firmware(struct mt7601u_dev *dev)
{
const struct firmware *fw;
const struct mt76_fw_header *hdr;
int len, ret;
u32 val;
mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
MT_USB_DMA_CFG_TX_BULK_EN));
if (firmware_running(dev))
return firmware_request_cache(dev->dev, MT7601U_FIRMWARE);
ret = request_firmware(&fw, MT7601U_FIRMWARE, dev->dev);
if (ret)
return ret;
if (!fw || !fw->data || fw->size < sizeof(*hdr))
goto err_inv_fw;
hdr = (const struct mt76_fw_header *) fw->data;
if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE)
goto err_inv_fw;
len = sizeof(*hdr);
len += le32_to_cpu(hdr->ilm_len);
len += le32_to_cpu(hdr->dlm_len);
if (fw->size != len)
goto err_inv_fw;
val = le16_to_cpu(hdr->fw_ver);
dev_info(dev->dev,
"Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
(val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
le16_to_cpu(hdr->build_ver), hdr->build_time);
len = le32_to_cpu(hdr->ilm_len);
mt7601u_wr(dev, 0x94c, 0);
mt7601u_wr(dev, MT_FCE_PSE_CTRL, 0);
mt7601u_vendor_reset(dev);
msleep(5);
mt7601u_wr(dev, 0xa44, 0);
mt7601u_wr(dev, 0x230, 0x84210);
mt7601u_wr(dev, 0x400, 0x80c00);
mt7601u_wr(dev, 0x800, 1);
mt7601u_rmw(dev, MT_PBF_CFG, 0, (MT_PBF_CFG_TX0Q_EN |
MT_PBF_CFG_TX1Q_EN |
MT_PBF_CFG_TX2Q_EN |
MT_PBF_CFG_TX3Q_EN));
mt7601u_wr(dev, MT_FCE_PSE_CTRL, 1);
mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
MT_USB_DMA_CFG_TX_BULK_EN));
val = mt76_set(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_TX_CLR);
val &= ~MT_USB_DMA_CFG_TX_CLR;
mt7601u_wr(dev, MT_USB_DMA_CFG, val);
/* FCE tx_fs_base_ptr */
mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
/* FCE tx_fs_max_cnt */
mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
/* FCE pdma enable */
mt7601u_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
/* FCE skip_fs_en */
mt7601u_wr(dev, MT_FCE_SKIP_FS, 3);
ret = mt7601u_upload_firmware(dev, (const struct mt76_fw *)fw->data);
release_firmware(fw);
return ret;
err_inv_fw:
dev_err(dev->dev, "Invalid firmware image\n");
release_firmware(fw);
return -ENOENT;
}
int mt7601u_mcu_init(struct mt7601u_dev *dev)
{
int ret;
mutex_init(&dev->mcu.mutex);
ret = mt7601u_load_firmware(dev);
if (ret)
return ret;
set_bit(MT7601U_STATE_MCU_RUNNING, &dev->state);
return 0;
}
int mt7601u_mcu_cmd_init(struct mt7601u_dev *dev)
{
int ret;
ret = mt7601u_mcu_function_select(dev, Q_SELECT, 1);
if (ret)
return ret;
init_completion(&dev->mcu.resp_cmpl);
if (mt7601u_usb_alloc_buf(dev, MCU_RESP_URB_SIZE, &dev->mcu.resp)) {
mt7601u_usb_free_buf(dev, &dev->mcu.resp);
return -ENOMEM;
}
ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
&dev->mcu.resp, GFP_KERNEL,
mt7601u_complete_urb, &dev->mcu.resp_cmpl);
if (ret) {
mt7601u_usb_free_buf(dev, &dev->mcu.resp);
return ret;
}
return 0;
}
void mt7601u_mcu_cmd_deinit(struct mt7601u_dev *dev)
{
usb_kill_urb(dev->mcu.resp.urb);
mt7601u_usb_free_buf(dev, &dev->mcu.resp);
}
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