drivers/net/wireless/mediatek/mt76/mt76x02_mcu.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   4  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/firmware.h>
   9 #include <linux/delay.h>
  10
  11 #include "mt76x02_mcu.h"
  12
  13 int mt76x02_mcu_parse_response(struct mt76_dev *mdev, int cmd,
  14                                struct sk_buff *skb, int seq)
  15 {
  16         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
  17         u32 *rxfce;
  18
  19         if (!skb) {
  20                 dev_err(mdev->dev,
  21                         "MCU message %d (seq %d) timed out\n", cmd,
  22                         seq);
  23                 dev->mcu_timeout = 1;
  24                 return -ETIMEDOUT;
  25         }
  26
  27         rxfce = (u32 *)skb->cb;
  28         if (seq != FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, *rxfce))
  29                 return -EAGAIN;
  30
  31         return 0;
  32 }
  33 EXPORT_SYMBOL_GPL(mt76x02_mcu_parse_response);
  34
  35 int mt76x02_mcu_msg_send(struct mt76_dev *mdev, int cmd, const void *data,
  36                          int len, bool wait_resp)
  37 {
  38         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
  39         unsigned long expires = jiffies + HZ;
  40         struct sk_buff *skb;
  41         u32 tx_info;
  42         int ret;
  43         u8 seq;
  44
  45         if (dev->mcu_timeout)
  46                 return -EIO;
  47
  48         skb = mt76_mcu_msg_alloc(mdev, data, len);
  49         if (!skb)
  50                 return -ENOMEM;
  51
  52         mutex_lock(&mdev->mcu.mutex);
  53
  54         seq = ++mdev->mcu.msg_seq & 0xf;
  55         if (!seq)
  56                 seq = ++mdev->mcu.msg_seq & 0xf;
  57
  58         tx_info = MT_MCU_MSG_TYPE_CMD |
  59                   FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
  60                   FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
  61                   FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
  62                   FIELD_PREP(MT_MCU_MSG_LEN, skb->len);
  63
  64         ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[MT_MCUQ_WM], skb, tx_info);
  65         if (ret)
  66                 goto out;
  67
  68         while (wait_resp) {
  69                 skb = mt76_mcu_get_response(&dev->mt76, expires);
  70                 ret = mt76x02_mcu_parse_response(mdev, cmd, skb, seq);
  71                 dev_kfree_skb(skb);
  72                 if (ret != -EAGAIN)
  73                         break;
  74         }
  75
  76 out:
  77         mutex_unlock(&mdev->mcu.mutex);
  78
  79         return ret;
  80 }
  81 EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_send);
  82
  83 int mt76x02_mcu_function_select(struct mt76x02_dev *dev, enum mcu_function func,
  84                                 u32 val)
  85 {
  86         struct {
  87                 __le32 id;
  88                 __le32 value;
  89         } __packed __aligned(4) msg = {
  90                 .id = cpu_to_le32(func),
  91                 .value = cpu_to_le32(val),
  92         };
  93         bool wait = false;
  94
  95         if (func != Q_SELECT)
  96                 wait = true;
  97
  98         return mt76_mcu_send_msg(&dev->mt76, CMD_FUN_SET_OP, &msg,
  99                                  sizeof(msg), wait);
 100 }
 101 EXPORT_SYMBOL_GPL(mt76x02_mcu_function_select);
 102
 103 int mt76x02_mcu_set_radio_state(struct mt76x02_dev *dev, bool on)
 104 {
 105         struct {
 106                 __le32 mode;
 107                 __le32 level;
 108         } __packed __aligned(4) msg = {
 109                 .mode = cpu_to_le32(on ? RADIO_ON : RADIO_OFF),
 110                 .level = cpu_to_le32(0),
 111         };
 112
 113         return mt76_mcu_send_msg(&dev->mt76, CMD_POWER_SAVING_OP, &msg,
 114                                  sizeof(msg), false);
 115 }
 116 EXPORT_SYMBOL_GPL(mt76x02_mcu_set_radio_state);
 117
 118 int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type, u32 param)
 119 {
 120         struct {
 121                 __le32 id;
 122                 __le32 value;
 123         } __packed __aligned(4) msg = {
 124                 .id = cpu_to_le32(type),
 125                 .value = cpu_to_le32(param),
 126         };
 127         bool is_mt76x2e = mt76_is_mmio(&dev->mt76) && is_mt76x2(dev);
 128         int ret;
 129
 130         if (is_mt76x2e)
 131                 mt76_rmw(dev, MT_MCU_COM_REG0, BIT(31), 0);
 132
 133         ret = mt76_mcu_send_msg(&dev->mt76, CMD_CALIBRATION_OP, &msg,
 134                                 sizeof(msg), true);
 135         if (ret)
 136                 return ret;
 137
 138         if (is_mt76x2e &&
 139             WARN_ON(!mt76_poll_msec(dev, MT_MCU_COM_REG0,
 140                                     BIT(31), BIT(31), 100)))
 141                 return -ETIMEDOUT;
 142
 143         return 0;
 144 }
 145 EXPORT_SYMBOL_GPL(mt76x02_mcu_calibrate);
 146
 147 int mt76x02_mcu_cleanup(struct mt76x02_dev *dev)
 148 {
 149         struct sk_buff *skb;
 150
 151         mt76_wr(dev, MT_MCU_INT_LEVEL, 1);
 152         usleep_range(20000, 30000);
 153
 154         while ((skb = skb_dequeue(&dev->mt76.mcu.res_q)) != NULL)
 155                 dev_kfree_skb(skb);
 156
 157         return 0;
 158 }
 159 EXPORT_SYMBOL_GPL(mt76x02_mcu_cleanup);
 160
 161 void mt76x02_set_ethtool_fwver(struct mt76x02_dev *dev,
 162                                const struct mt76x02_fw_header *h)
 163 {
 164         u16 bld = le16_to_cpu(h->build_ver);
 165         u16 ver = le16_to_cpu(h->fw_ver);
 166
 167         snprintf(dev->mt76.hw->wiphy->fw_version,
 168                  sizeof(dev->mt76.hw->wiphy->fw_version),
 169                  "%d.%d.%02d-b%x",
 170                  (ver >> 12) & 0xf, (ver >> 8) & 0xf, ver & 0xf, bld);
 171 }
 172 EXPORT_SYMBOL_GPL(mt76x02_set_ethtool_fwver);