drivers/net/wireless/mediatek/mt76/mt7921/usb.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2022 MediaTek Inc.
   3  *
   4  * Author: Lorenzo Bianconi <lorenzo@kernel.org>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/usb.h>
  10
  11 #include "mt7921.h"
  12 #include "mcu.h"
  13 #include "../mt76_connac2_mac.h"
  14
  15 static const struct usb_device_id mt7921u_device_table[] = {
  16         { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7961, 0xff, 0xff, 0xff),
  17                 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
  18         /* Comfast CF-952AX */
  19         { USB_DEVICE_AND_INTERFACE_INFO(0x3574, 0x6211, 0xff, 0xff, 0xff),
  20                 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
  21         /* Netgear, Inc. [A8000,AXE3000] */
  22         { USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9060, 0xff, 0xff, 0xff),
  23                 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
  24         { },
  25 };
  26
  27 static int
  28 mt7921u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
  29                          int cmd, int *seq)
  30 {
  31         struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
  32         u32 pad, ep;
  33         int ret;
  34
  35         ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);
  36         if (ret)
  37                 return ret;
  38
  39         mdev->mcu.timeout = 3 * HZ;
  40
  41         if (cmd != MCU_CMD(FW_SCATTER))
  42                 ep = MT_EP_OUT_INBAND_CMD;
  43         else
  44                 ep = MT_EP_OUT_AC_BE;
  45
  46         mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
  47         pad = round_up(skb->len, 4) + 4 - skb->len;
  48         __skb_put_zero(skb, pad);
  49
  50         ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
  51                              1000, ep);
  52         dev_kfree_skb(skb);
  53
  54         return ret;
  55 }
  56
  57 static int mt7921u_mcu_init(struct mt792x_dev *dev)
  58 {
  59         static const struct mt76_mcu_ops mcu_ops = {
  60                 .headroom = MT_SDIO_HDR_SIZE +
  61                             sizeof(struct mt76_connac2_mcu_txd),
  62                 .tailroom = MT_USB_TAIL_SIZE,
  63                 .mcu_skb_send_msg = mt7921u_mcu_send_message,
  64                 .mcu_parse_response = mt7921_mcu_parse_response,
  65         };
  66         int ret;
  67
  68         dev->mt76.mcu_ops = &mcu_ops;
  69
  70         mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
  71         ret = mt7921_run_firmware(dev);
  72         if (ret)
  73                 return ret;
  74
  75         set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
  76         mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
  77
  78         return 0;
  79 }
  80
  81 static int mt7921u_mac_reset(struct mt792x_dev *dev)
  82 {
  83         int err;
  84
  85         mt76_txq_schedule_all(&dev->mphy);
  86         mt76_worker_disable(&dev->mt76.tx_worker);
  87
  88         set_bit(MT76_RESET, &dev->mphy.state);
  89         set_bit(MT76_MCU_RESET, &dev->mphy.state);
  90
  91         wake_up(&dev->mt76.mcu.wait);
  92         skb_queue_purge(&dev->mt76.mcu.res_q);
  93
  94         mt76u_stop_rx(&dev->mt76);
  95         mt76u_stop_tx(&dev->mt76);
  96
  97         mt792xu_wfsys_reset(dev);
  98
  99         clear_bit(MT76_MCU_RESET, &dev->mphy.state);
 100         err = mt76u_resume_rx(&dev->mt76);
 101         if (err)
 102                 goto out;
 103
 104         err = mt792xu_mcu_power_on(dev);
 105         if (err)
 106                 goto out;
 107
 108         err = mt792xu_dma_init(dev, false);
 109         if (err)
 110                 goto out;
 111
 112         mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
 113         mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 114
 115         err = mt7921_run_firmware(dev);
 116         if (err)
 117                 goto out;
 118
 119         mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 120
 121         err = mt7921_mcu_set_eeprom(dev);
 122         if (err)
 123                 goto out;
 124
 125         err = mt7921_mac_init(dev);
 126         if (err)
 127                 goto out;
 128
 129         err = __mt7921_start(&dev->phy);
 130 out:
 131         clear_bit(MT76_RESET, &dev->mphy.state);
 132
 133         mt76_worker_enable(&dev->mt76.tx_worker);
 134
 135         return err;
 136 }
 137
 138 static int mt7921u_probe(struct usb_interface *usb_intf,
 139                          const struct usb_device_id *id)
 140 {
 141         static const struct mt76_driver_ops drv_ops = {
 142                 .txwi_size = MT_SDIO_TXD_SIZE,
 143                 .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
 144                              MT_DRV_AMSDU_OFFLOAD,
 145                 .survey_flags = SURVEY_INFO_TIME_TX |
 146                                 SURVEY_INFO_TIME_RX |
 147                                 SURVEY_INFO_TIME_BSS_RX,
 148                 .tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
 149                 .tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
 150                 .tx_status_data = mt7921_usb_sdio_tx_status_data,
 151                 .rx_skb = mt7921_queue_rx_skb,
 152                 .rx_check = mt7921_rx_check,
 153                 .sta_add = mt7921_mac_sta_add,
 154                 .sta_event = mt7921_mac_sta_event,
 155                 .sta_remove = mt7921_mac_sta_remove,
 156                 .update_survey = mt792x_update_channel,
 157                 .set_channel = mt7921_set_channel,
 158         };
 159         static const struct mt792x_hif_ops hif_ops = {
 160                 .mcu_init = mt7921u_mcu_init,
 161                 .init_reset = mt792xu_init_reset,
 162                 .reset = mt7921u_mac_reset,
 163         };
 164         static struct mt76_bus_ops bus_ops = {
 165                 .rr = mt792xu_rr,
 166                 .wr = mt792xu_wr,
 167                 .rmw = mt792xu_rmw,
 168                 .read_copy = mt76u_read_copy,
 169                 .write_copy = mt792xu_copy,
 170                 .type = MT76_BUS_USB,
 171         };
 172         struct usb_device *udev = interface_to_usbdev(usb_intf);
 173         struct ieee80211_ops *ops;
 174         struct ieee80211_hw *hw;
 175         struct mt792x_dev *dev;
 176         struct mt76_dev *mdev;
 177         u8 features;
 178         int ret;
 179
 180         ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7921_ops,
 181                                       (void *)id->driver_info, &features);
 182         if (!ops)
 183                 return -ENOMEM;
 184
 185         ops->stop = mt792xu_stop;
 186         mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
 187         if (!mdev)
 188                 return -ENOMEM;
 189
 190         dev = container_of(mdev, struct mt792x_dev, mt76);
 191         dev->fw_features = features;
 192         dev->hif_ops = &hif_ops;
 193
 194         udev = usb_get_dev(udev);
 195         usb_reset_device(udev);
 196
 197         usb_set_intfdata(usb_intf, dev);
 198
 199         ret = __mt76u_init(mdev, usb_intf, &bus_ops);
 200         if (ret < 0)
 201                 goto error;
 202
 203         mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
 204                     (mt76_rr(dev, MT_HW_REV) & 0xff);
 205         dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
 206
 207         if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
 208                 ret = mt792xu_wfsys_reset(dev);
 209                 if (ret)
 210                         goto error;
 211         }
 212
 213         ret = mt792xu_mcu_power_on(dev);
 214         if (ret)
 215                 goto error;
 216
 217         ret = mt76u_alloc_mcu_queue(&dev->mt76);
 218         if (ret)
 219                 goto error;
 220
 221         ret = mt76u_alloc_queues(&dev->mt76);
 222         if (ret)
 223                 goto error;
 224
 225         ret = mt792xu_dma_init(dev, false);
 226         if (ret)
 227                 goto error;
 228
 229         hw = mt76_hw(dev);
 230         /* check hw sg support in order to enable AMSDU */
 231         hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
 232
 233         ret = mt7921_register_device(dev);
 234         if (ret)
 235                 goto error;
 236
 237         return 0;
 238
 239 error:
 240         mt76u_queues_deinit(&dev->mt76);
 241
 242         usb_set_intfdata(usb_intf, NULL);
 243         usb_put_dev(interface_to_usbdev(usb_intf));
 244
 245         mt76_free_device(&dev->mt76);
 246
 247         return ret;
 248 }
 249
 250 #ifdef CONFIG_PM
 251 static int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)
 252 {
 253         struct mt792x_dev *dev = usb_get_intfdata(intf);
 254         struct mt76_connac_pm *pm = &dev->pm;
 255         int err;
 256
 257         pm->suspended = true;
 258         flush_work(&dev->reset_work);
 259
 260         err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);
 261         if (err)
 262                 goto failed;
 263
 264         mt76u_stop_rx(&dev->mt76);
 265         mt76u_stop_tx(&dev->mt76);
 266
 267         return 0;
 268
 269 failed:
 270         pm->suspended = false;
 271
 272         if (err < 0)
 273                 mt792x_reset(&dev->mt76);
 274
 275         return err;
 276 }
 277
 278 static int mt7921u_resume(struct usb_interface *intf)
 279 {
 280         struct mt792x_dev *dev = usb_get_intfdata(intf);
 281         struct mt76_connac_pm *pm = &dev->pm;
 282         bool reinit = true;
 283         int err, i;
 284
 285         for (i = 0; i < 10; i++) {
 286                 u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
 287
 288                 if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
 289                         reinit = false;
 290                         break;
 291                 }
 292                 if (val & MT_WF_SW_SER_DONE_SUSPEND) {
 293                         mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
 294                         break;
 295                 }
 296
 297                 msleep(20);
 298         }
 299
 300         if (reinit || mt792x_dma_need_reinit(dev)) {
 301                 err = mt792xu_dma_init(dev, true);
 302                 if (err)
 303                         goto failed;
 304         }
 305
 306         err = mt76u_resume_rx(&dev->mt76);
 307         if (err < 0)
 308                 goto failed;
 309
 310         err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);
 311 failed:
 312         pm->suspended = false;
 313
 314         if (err < 0)
 315                 mt792x_reset(&dev->mt76);
 316
 317         return err;
 318 }
 319 #endif /* CONFIG_PM */
 320
 321 MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
 322 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
 323 MODULE_FIRMWARE(MT7921_ROM_PATCH);
 324
 325 static struct usb_driver mt7921u_driver = {
 326         .name           = KBUILD_MODNAME,
 327         .id_table       = mt7921u_device_table,
 328         .probe          = mt7921u_probe,
 329         .disconnect     = mt792xu_disconnect,
 330 #ifdef CONFIG_PM
 331         .suspend        = mt7921u_suspend,
 332         .resume         = mt7921u_resume,
 333         .reset_resume   = mt7921u_resume,
 334 #endif /* CONFIG_PM */
 335         .soft_unbind    = 1,
 336         .disable_hub_initiated_lpm = 1,
 337 };
 338 module_usb_driver(mt7921u_driver);
 339
 340 MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");
 341 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
 342 MODULE_LICENSE("Dual BSD/GPL");