/*
* (c) Copyright 2002-2010, Ralink Technology, Inc.
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
*
* 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
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/usb.h>
#include <linux/skbuff.h>
#include "mt76x0.h"
#include "dma.h"
#include "mcu.h"
#include "usb.h"
#include "trace.h"
#define MCU_FW_URB_MAX_PAYLOAD 0x38f8
#define MCU_FW_URB_SIZE (MCU_FW_URB_MAX_PAYLOAD + 12)
#define MCU_RESP_URB_SIZE 1024
static inline int firmware_running(struct mt76x0_dev *dev)
{
return mt76_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));
}
int mt76x0_mcu_function_select(struct mt76x0_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 = mt76u_mcu_msg_alloc(&msg, sizeof(msg));
if (!skb)
return -ENOMEM;
return mt76u_mcu_send_msg(&dev->mt76, skb, CMD_FUN_SET_OP,
func == 5);
}
int
mt76x0_mcu_calibrate(struct mt76x0_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 = mt76u_mcu_msg_alloc(&msg, sizeof(msg));
if (!skb)
return -ENOMEM;
return mt76u_mcu_send_msg(&dev->mt76, skb, CMD_CALIBRATION_OP,
true);
}
int mt76x0_write_reg_pairs(struct mt76x0_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 = mt76u_mcu_send_msg(&dev->mt76, skb, CMD_RANDOM_WRITE,
cnt == n);
if (ret)
return ret;
return mt76x0_write_reg_pairs(dev, base, data + cnt, n - cnt);
}
int mt76x0_read_reg_pairs(struct mt76x0_dev *dev, u32 base,
struct mt76_reg_pair *data, int n)
{
const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 8;
struct mt76_usb *usb = &dev->mt76.usb;
struct sk_buff *skb;
int cnt, i, ret;
if (!n)
return 0;
cnt = min(max_vals_per_cmd, n);
if (cnt != n)
return -EINVAL;
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);
}
mutex_lock(&usb->mcu.mutex);
usb->mcu.rp = data;
usb->mcu.rp_len = n;
usb->mcu.base = base;
usb->mcu.burst = false;
ret = __mt76u_mcu_send_msg(&dev->mt76, skb, CMD_RANDOM_READ,
true);
usb->mcu.rp = NULL;
mutex_unlock(&usb->mcu.mutex);
return ret;
}
int mt76x0_burst_write_regs(struct mt76x0_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 = mt76u_mcu_send_msg(&dev->mt76, skb, CMD_BURST_WRITE,
cnt == n);
if (ret)
return ret;
return mt76x0_burst_write_regs(dev, offset + cnt * 4,
data + cnt, n - cnt);
}
#if 0
static int mt76x0_burst_read_regs(struct mt76x0_dev *dev, u32 base,
struct mt76_reg_pair *data, int n)
{
const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 4 - 1;
struct mt76_usb *usb = &dev->mt76.usb;
struct sk_buff *skb;
int cnt, ret;
if (!n)
return 0;
cnt = min(max_vals_per_cmd, n);
if (cnt != n)
return -EINVAL;
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, base + data[0].reg);
skb_put_le32(skb, n);
mutex_lock(&usb->mcu.mutex);
usb->mcu.rp = data;
usb->mcu.rp_len = n;
usb->mcu.base = base;
usb->mcu.burst = false;
ret = __mt76u_mcu_send_msg(&dev->mt76, skb, CMD_BURST_READ, true);
usb->mcu.rp = NULL;
mutex_unlock(&usb->mcu.mutex);
consume_skb(skb);
return ret;
}
#endif
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
mt76x0_upload_firmware(struct mt76x0_dev *dev, const struct mt76_fw *fw)
{
void *ivb;
u32 ilm_len, dlm_len;
int i, ret;
ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL);
if (!ivb)
return -ENOMEM;
ilm_len = le32_to_cpu(fw->hdr.ilm_len) - sizeof(fw->ivb);
dev_dbg(dev->mt76.dev, "loading FW - ILM %u + IVB %zu\n",
ilm_len, sizeof(fw->ivb));
ret = mt76u_mcu_fw_send_data(&dev->mt76, fw->ilm, ilm_len,
MCU_FW_URB_MAX_PAYLOAD,
sizeof(fw->ivb));
if (ret)
goto error;
dlm_len = le32_to_cpu(fw->hdr.dlm_len);
dev_dbg(dev->mt76.dev, "loading FW - DLM %u\n", dlm_len);
ret = mt76u_mcu_fw_send_data(&dev->mt76, fw->ilm + ilm_len,
dlm_len, MCU_FW_URB_MAX_PAYLOAD,
MT_MCU_DLM_OFFSET);
if (ret)
goto error;
ret = mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,
USB_DIR_OUT | USB_TYPE_VENDOR,
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->mt76.dev, "Firmware running!\n");
error:
kfree(ivb);
return ret;
}
static int mt76x0_load_firmware(struct mt76x0_dev *dev)
{
const struct firmware *fw;
const struct mt76_fw_header *hdr;
int len, ret;
u32 val;
mt76_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 0;
ret = request_firmware(&fw, MT7610_FIRMWARE, dev->mt76.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_dbg(dev->mt76.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);
mt76_wr(dev, 0x1004, 0x2c);
mt76_set(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
MT_USB_DMA_CFG_TX_BULK_EN) |
FIELD_PREP(MT_USB_DMA_CFG_RX_BULK_AGG_TOUT, 0x20));
mt76u_mcu_fw_reset(&dev->mt76);
msleep(5);
/*
mt76x0_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));
*/
mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
/* FCE tx_fs_base_ptr */
mt76_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
/* FCE tx_fs_max_cnt */
mt76_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
/* FCE pdma enable */
mt76_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
/* FCE skip_fs_en */
mt76_wr(dev, MT_FCE_SKIP_FS, 3);
val = mt76_rr(dev, MT_USB_DMA_CFG);
val |= MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
mt76_wr(dev, MT_USB_DMA_CFG, val);
val &= ~MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
mt76_wr(dev, MT_USB_DMA_CFG, val);
ret = mt76x0_upload_firmware(dev, (const struct mt76_fw *)fw->data);
release_firmware(fw);
mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
return ret;
err_inv_fw:
dev_err(dev->mt76.dev, "Invalid firmware image\n");
release_firmware(fw);
return -ENOENT;
}
int mt76x0_mcu_init(struct mt76x0_dev *dev)
{
int ret;
ret = mt76x0_load_firmware(dev);
if (ret)
return ret;
set_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state);
return 0;
}
int mt76x0_mcu_cmd_init(struct mt76x0_dev *dev)
{
int ret = mt76x0_mcu_function_select(dev, Q_SELECT, 1);
if (ret)
return ret;
return mt76u_mcu_init_rx(&dev->mt76);
}
