drivers/net/wireless/mediatek/mt76/mt76x0/pci_mcu.c

   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
   8 #include "mt76x0.h"
   9 #include "mcu.h"
  10
  11 #define MT_MCU_IVB_ADDR         (MT_MCU_ILM_ADDR + 0x54000 - MT_MCU_IVB_SIZE)
  12
  13 static int mt76x0e_load_firmware(struct mt76x02_dev *dev)
  14 {
  15         bool is_combo_chip = mt76_chip(&dev->mt76) != 0x7610;
  16         u32 val, ilm_len, dlm_len, offset = 0;
  17         const struct mt76x02_fw_header *hdr;
  18         const struct firmware *fw;
  19         const char *firmware;
  20         const u8 *fw_payload;
  21         int len, err;
  22
  23         if (is_combo_chip)
  24                 firmware = MT7650E_FIRMWARE;
  25         else
  26                 firmware = MT7610E_FIRMWARE;
  27
  28         err = request_firmware(&fw, firmware, dev->mt76.dev);
  29         if (err)
  30                 return err;
  31
  32         if (!fw || !fw->data || fw->size < sizeof(*hdr)) {
  33                 err = -EIO;
  34                 goto out;
  35         }
  36
  37         hdr = (const struct mt76x02_fw_header *)fw->data;
  38
  39         len = sizeof(*hdr);
  40         len += le32_to_cpu(hdr->ilm_len);
  41         len += le32_to_cpu(hdr->dlm_len);
  42
  43         if (fw->size != len) {
  44                 err = -EIO;
  45                 goto out;
  46         }
  47
  48         fw_payload = fw->data + sizeof(*hdr);
  49
  50         val = le16_to_cpu(hdr->fw_ver);
  51         dev_info(dev->mt76.dev, "Firmware Version: %d.%d.%02d\n",
  52                  (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf);
  53
  54         val = le16_to_cpu(hdr->fw_ver);
  55         dev_dbg(dev->mt76.dev,
  56                 "Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
  57                 (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
  58                 le16_to_cpu(hdr->build_ver), hdr->build_time);
  59
  60         if (is_combo_chip && !mt76_poll(dev, MT_MCU_SEMAPHORE_00, 1, 1, 600)) {
  61                 dev_err(dev->mt76.dev,
  62                         "Could not get hardware semaphore for loading fw\n");
  63                 err = -ETIMEDOUT;
  64                 goto out;
  65         }
  66
  67         /* upload ILM. */
  68         mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
  69         ilm_len = le32_to_cpu(hdr->ilm_len);
  70         if (is_combo_chip) {
  71                 ilm_len -= MT_MCU_IVB_SIZE;
  72                 offset = MT_MCU_IVB_SIZE;
  73         }
  74         dev_dbg(dev->mt76.dev, "loading FW - ILM %u\n", ilm_len);
  75         mt76_wr_copy(dev, MT_MCU_ILM_ADDR + offset, fw_payload + offset,
  76                      ilm_len);
  77
  78         /* upload IVB. */
  79         if (is_combo_chip) {
  80                 dev_dbg(dev->mt76.dev, "loading FW - IVB %u\n",
  81                         MT_MCU_IVB_SIZE);
  82                 mt76_wr_copy(dev, MT_MCU_IVB_ADDR, fw_payload, MT_MCU_IVB_SIZE);
  83         }
  84
  85         /* upload DLM. */
  86         mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, MT_MCU_DLM_OFFSET);
  87         dlm_len = le32_to_cpu(hdr->dlm_len);
  88         dev_dbg(dev->mt76.dev, "loading FW - DLM %u\n", dlm_len);
  89         mt76_wr_copy(dev, MT_MCU_ILM_ADDR,
  90                      fw_payload + le32_to_cpu(hdr->ilm_len), dlm_len);
  91
  92         /* trigger firmware */
  93         mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
  94         if (is_combo_chip)
  95                 mt76_wr(dev, MT_MCU_INT_LEVEL, 0x3);
  96         else
  97                 mt76_wr(dev, MT_MCU_RESET_CTL, 0x300);
  98
  99         if (!mt76_poll_msec(dev, MT_MCU_COM_REG0, 1, 1, 1000)) {
 100                 dev_err(dev->mt76.dev, "Firmware failed to start\n");
 101                 err = -ETIMEDOUT;
 102                 goto out;
 103         }
 104
 105         mt76x02_set_ethtool_fwver(dev, hdr);
 106         dev_dbg(dev->mt76.dev, "Firmware running!\n");
 107
 108 out:
 109         if (is_combo_chip)
 110                 mt76_wr(dev, MT_MCU_SEMAPHORE_00, 0x1);
 111         release_firmware(fw);
 112
 113         return err;
 114 }
 115
 116 int mt76x0e_mcu_init(struct mt76x02_dev *dev)
 117 {
 118         static const struct mt76_mcu_ops mt76x0e_mcu_ops = {
 119                 .mcu_send_msg = mt76x02_mcu_msg_send,
 120         };
 121         int err;
 122
 123         dev->mt76.mcu_ops = &mt76x0e_mcu_ops;
 124
 125         err = mt76x0e_load_firmware(dev);
 126         if (err < 0)
 127                 return err;
 128
 129         set_bit(MT76_STATE_MCU_RUNNING, &dev->mt76.state);
 130
 131         return 0;
 132 }