LXR linux/drivers/net/wireless/mediatek/mt76/mt76x0/usb

   1// SPDX-License-Identifier: ISC
   2/*
   3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
   4 */
   5#include <linux/kernel.h>
   6#include <linux/firmware.h>
   7#include <linux/module.h>
   8
   9#include "mt76x0.h"
  10#include "mcu.h"
  11#include "../mt76x02_usb.h"
  12
  13#define MCU_FW_URB_MAX_PAYLOAD          0x38f8
  14#define MCU_FW_URB_SIZE                 (MCU_FW_URB_MAX_PAYLOAD + 12)
  15
  16static int
  17mt76x0u_upload_firmware(struct mt76x02_dev *dev,
  18                        const struct mt76x02_fw_header *hdr)
  19{
  20        u8 *fw_payload = (u8 *)(hdr + 1);
  21        u32 ilm_len, dlm_len;
  22        void *ivb;
  23        int err;
  24
  25        ivb = kmemdup(fw_payload, MT_MCU_IVB_SIZE, GFP_KERNEL);
  26        if (!ivb)
  27                return -ENOMEM;
  28
  29        ilm_len = le32_to_cpu(hdr->ilm_len) - MT_MCU_IVB_SIZE;
  30        dev_dbg(dev->mt76.dev, "loading FW - ILM %u + IVB %u\n",
  31                ilm_len, MT_MCU_IVB_SIZE);
  32        err = mt76x02u_mcu_fw_send_data(dev, fw_payload + MT_MCU_IVB_SIZE,
  33                                        ilm_len, MCU_FW_URB_MAX_PAYLOAD,
  34                                        MT_MCU_IVB_SIZE);
  35        if (err)
  36                goto out;
  37
  38        dlm_len = le32_to_cpu(hdr->dlm_len);
  39        dev_dbg(dev->mt76.dev, "loading FW - DLM %u\n", dlm_len);
  40        err = mt76x02u_mcu_fw_send_data(dev,
  41                                        fw_payload + le32_to_cpu(hdr->ilm_len),
  42                                        dlm_len, MCU_FW_URB_MAX_PAYLOAD,
  43                                        MT_MCU_DLM_OFFSET);
  44        if (err)
  45                goto out;
  46
  47        err = mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,
  48                                   USB_DIR_OUT | USB_TYPE_VENDOR,
  49                                   0x12, 0, ivb, MT_MCU_IVB_SIZE);
  50        if (err < 0)
  51                goto out;
  52
  53        if (!mt76_poll_msec(dev, MT_MCU_COM_REG0, 1, 1, 1000)) {
  54                dev_err(dev->mt76.dev, "Firmware failed to start\n");
  55                err = -ETIMEDOUT;
  56                goto out;
  57        }
  58
  59        dev_dbg(dev->mt76.dev, "Firmware running!\n");
  60
  61out:
  62        kfree(ivb);
  63
  64        return err;
  65}
  66
  67static int mt76x0_get_firmware(struct mt76x02_dev *dev,
  68                               const struct firmware **fw)
  69{
  70        int err;
  71
  72        /* try to load mt7610e fw if available
  73         * otherwise fall back to mt7610u one
  74         */
  75        err = firmware_request_nowarn(fw, MT7610E_FIRMWARE, dev->mt76.dev);
  76        if (err) {
  77                dev_info(dev->mt76.dev, "%s not found, switching to %s",
  78                         MT7610E_FIRMWARE, MT7610U_FIRMWARE);
  79                return request_firmware(fw, MT7610U_FIRMWARE,
  80                                        dev->mt76.dev);
  81        }
  82        return 0;
  83}
  84
  85static int mt76x0u_load_firmware(struct mt76x02_dev *dev)
  86{
  87        const struct firmware *fw;
  88        const struct mt76x02_fw_header *hdr;
  89        int len, ret;
  90        u32 val;
  91
  92        mt76_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
  93                                      MT_USB_DMA_CFG_TX_BULK_EN));
  94
  95        if (mt76x0_firmware_running(dev))
  96                return 0;
  97
  98        ret = mt76x0_get_firmware(dev, &fw);
  99        if (ret)
 100                return ret;
 101
 102        if (!fw || !fw->data || fw->size < sizeof(*hdr))
 103                goto err_inv_fw;
 104
 105        hdr = (const struct mt76x02_fw_header *)fw->data;
 106
 107        if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE)
 108                goto err_inv_fw;
 109
 110        len = sizeof(*hdr);
 111        len += le32_to_cpu(hdr->ilm_len);
 112        len += le32_to_cpu(hdr->dlm_len);
 113
 114        if (fw->size != len)
 115                goto err_inv_fw;
 116
 117        val = le16_to_cpu(hdr->fw_ver);
 118        dev_dbg(dev->mt76.dev,
 119                "Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
 120                (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
 121                le16_to_cpu(hdr->build_ver), hdr->build_time);
 122
 123        len = le32_to_cpu(hdr->ilm_len);
 124
 125        mt76_wr(dev, 0x1004, 0x2c);
 126
 127        mt76_set(dev, MT_USB_DMA_CFG,
 128                 (MT_USB_DMA_CFG_RX_BULK_EN | MT_USB_DMA_CFG_TX_BULK_EN) |
 129                 FIELD_PREP(MT_USB_DMA_CFG_RX_BULK_AGG_TOUT, 0x20));
 130        mt76x02u_mcu_fw_reset(dev);
 131        usleep_range(5000, 6000);
 132
 133        mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
 134
 135        /* FCE tx_fs_base_ptr */
 136        mt76_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
 137        /* FCE tx_fs_max_cnt */
 138        mt76_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
 139        /* FCE pdma enable */
 140        mt76_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
 141        /* FCE skip_fs_en */
 142        mt76_wr(dev, MT_FCE_SKIP_FS, 3);
 143
 144        val = mt76_rr(dev, MT_USB_DMA_CFG);
 145        val |= MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
 146        mt76_wr(dev, MT_USB_DMA_CFG, val);
 147        val &= ~MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
 148        mt76_wr(dev, MT_USB_DMA_CFG, val);
 149
 150        ret = mt76x0u_upload_firmware(dev, hdr);
 151        release_firmware(fw);
 152
 153        mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
 154
 155        return ret;
 156
 157err_inv_fw:
 158        dev_err(dev->mt76.dev, "Invalid firmware image\n");
 159        release_firmware(fw);
 160        return -ENOENT;
 161}
 162
 163int mt76x0u_mcu_init(struct mt76x02_dev *dev)
 164{
 165        int ret;
 166
 167        ret = mt76x0u_load_firmware(dev);
 168        if (ret < 0)
 169                return ret;
 170
 171        set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
 172
 173        return 0;
 174}
 175