drivers/net/wireless/mediatek/mt76/mt7925/usb.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2023 MediaTek Inc. */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/usb.h>
   7
   8 #include "mt7925.h"
   9 #include "mcu.h"
  10 #include "mac.h"
  11
  12 static const struct usb_device_id mt7925u_device_table[] = {
  13         { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7925, 0xff, 0xff, 0xff),
  14                 .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
  15         { },
  16 };
  17
  18 static int
  19 mt7925u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
  20                          int cmd, int *seq)
  21 {
  22         struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
  23         u32 pad, ep;
  24         int ret;
  25
  26         ret = mt7925_mcu_fill_message(mdev, skb, cmd, seq);
  27         if (ret)
  28                 return ret;
  29
  30         mdev->mcu.timeout = 3 * HZ;
  31
  32         if (cmd != MCU_CMD(FW_SCATTER))
  33                 ep = MT_EP_OUT_INBAND_CMD;
  34         else
  35                 ep = MT_EP_OUT_AC_BE;
  36
  37         mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
  38         pad = round_up(skb->len, 4) + 4 - skb->len;
  39         __skb_put_zero(skb, pad);
  40
  41         ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
  42                              1000, ep);
  43         dev_kfree_skb(skb);
  44
  45         return ret;
  46 }
  47
  48 static int mt7925u_mcu_init(struct mt792x_dev *dev)
  49 {
  50         static const struct mt76_mcu_ops mcu_ops = {
  51                 .headroom = MT_SDIO_HDR_SIZE +
  52                             sizeof(struct mt76_connac2_mcu_txd),
  53                 .tailroom = MT_USB_TAIL_SIZE,
  54                 .mcu_skb_send_msg = mt7925u_mcu_send_message,
  55                 .mcu_parse_response = mt7925_mcu_parse_response,
  56         };
  57         int ret;
  58
  59         dev->mt76.mcu_ops = &mcu_ops;
  60
  61         mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
  62         ret = mt7925_run_firmware(dev);
  63         if (ret)
  64                 return ret;
  65
  66         set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
  67         mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
  68
  69         return 0;
  70 }
  71
  72 static int mt7925u_mac_reset(struct mt792x_dev *dev)
  73 {
  74         int err;
  75
  76         mt76_txq_schedule_all(&dev->mphy);
  77         mt76_worker_disable(&dev->mt76.tx_worker);
  78
  79         set_bit(MT76_RESET, &dev->mphy.state);
  80         set_bit(MT76_MCU_RESET, &dev->mphy.state);
  81
  82         wake_up(&dev->mt76.mcu.wait);
  83         skb_queue_purge(&dev->mt76.mcu.res_q);
  84
  85         mt76u_stop_rx(&dev->mt76);
  86         mt76u_stop_tx(&dev->mt76);
  87
  88         mt792xu_wfsys_reset(dev);
  89
  90         clear_bit(MT76_MCU_RESET, &dev->mphy.state);
  91         err = mt76u_resume_rx(&dev->mt76);
  92         if (err)
  93                 goto out;
  94
  95         err = mt792xu_mcu_power_on(dev);
  96         if (err)
  97                 goto out;
  98
  99         err = mt792xu_dma_init(dev, false);
 100         if (err)
 101                 goto out;
 102
 103         mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
 104         mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 105
 106         err = mt7925_run_firmware(dev);
 107         if (err)
 108                 goto out;
 109
 110         mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 111
 112         err = mt7925_mcu_set_eeprom(dev);
 113         if (err)
 114                 goto out;
 115
 116         err = mt7925_mac_init(dev);
 117         if (err)
 118                 goto out;
 119
 120         err = __mt7925_start(&dev->phy);
 121 out:
 122         clear_bit(MT76_RESET, &dev->mphy.state);
 123
 124         mt76_worker_enable(&dev->mt76.tx_worker);
 125
 126         return err;
 127 }
 128
 129 static int mt7925u_probe(struct usb_interface *usb_intf,
 130                          const struct usb_device_id *id)
 131 {
 132         static const struct mt76_driver_ops drv_ops = {
 133                 .txwi_size = MT_SDIO_TXD_SIZE,
 134                 .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
 135                              MT_DRV_AMSDU_OFFLOAD,
 136                 .survey_flags = SURVEY_INFO_TIME_TX |
 137                                 SURVEY_INFO_TIME_RX |
 138                                 SURVEY_INFO_TIME_BSS_RX,
 139                 .tx_prepare_skb = mt7925_usb_sdio_tx_prepare_skb,
 140                 .tx_complete_skb = mt7925_usb_sdio_tx_complete_skb,
 141                 .tx_status_data = mt7925_usb_sdio_tx_status_data,
 142                 .rx_skb = mt7925_queue_rx_skb,
 143                 .rx_check = mt7925_rx_check,
 144                 .sta_add = mt7925_mac_sta_add,
 145                 .sta_event = mt7925_mac_sta_event,
 146                 .sta_remove = mt7925_mac_sta_remove,
 147                 .update_survey = mt792x_update_channel,
 148         };
 149         static const struct mt792x_hif_ops hif_ops = {
 150                 .mcu_init = mt7925u_mcu_init,
 151                 .init_reset = mt792xu_init_reset,
 152                 .reset = mt7925u_mac_reset,
 153         };
 154         static struct mt76_bus_ops bus_ops = {
 155                 .rr = mt792xu_rr,
 156                 .wr = mt792xu_wr,
 157                 .rmw = mt792xu_rmw,
 158                 .read_copy = mt76u_read_copy,
 159                 .write_copy = mt792xu_copy,
 160                 .type = MT76_BUS_USB,
 161         };
 162         struct usb_device *udev = interface_to_usbdev(usb_intf);
 163         struct ieee80211_ops *ops;
 164         struct ieee80211_hw *hw;
 165         struct mt792x_dev *dev;
 166         struct mt76_dev *mdev;
 167         u8 features;
 168         int ret;
 169
 170         ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7925_ops,
 171                                       (void *)id->driver_info, &features);
 172         if (!ops)
 173                 return -ENOMEM;
 174
 175         ops->stop = mt792xu_stop;
 176
 177         mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
 178         if (!mdev)
 179                 return -ENOMEM;
 180
 181         dev = container_of(mdev, struct mt792x_dev, mt76);
 182         dev->fw_features = features;
 183         dev->hif_ops = &hif_ops;
 184
 185         udev = usb_get_dev(udev);
 186         usb_reset_device(udev);
 187
 188         usb_set_intfdata(usb_intf, dev);
 189
 190         ret = __mt76u_init(mdev, usb_intf, &bus_ops);
 191         if (ret < 0)
 192                 goto error;
 193
 194         mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
 195                     (mt76_rr(dev, MT_HW_REV) & 0xff);
 196         dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
 197
 198         if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
 199                 ret = mt792xu_wfsys_reset(dev);
 200                 if (ret)
 201                         goto error;
 202         }
 203
 204         ret = mt792xu_mcu_power_on(dev);
 205         if (ret)
 206                 goto error;
 207
 208         ret = mt76u_alloc_mcu_queue(&dev->mt76);
 209         if (ret)
 210                 goto error;
 211
 212         ret = mt76u_alloc_queues(&dev->mt76);
 213         if (ret)
 214                 goto error;
 215
 216         ret = mt792xu_dma_init(dev, false);
 217         if (ret)
 218                 goto error;
 219
 220         hw = mt76_hw(dev);
 221         /* check hw sg support in order to enable AMSDU */
 222         hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
 223
 224         ret = mt7925_register_device(dev);
 225         if (ret)
 226                 goto error;
 227
 228         return 0;
 229
 230 error:
 231         mt76u_queues_deinit(&dev->mt76);
 232
 233         usb_set_intfdata(usb_intf, NULL);
 234         usb_put_dev(interface_to_usbdev(usb_intf));
 235
 236         mt76_free_device(&dev->mt76);
 237
 238         return ret;
 239 }
 240
 241 #ifdef CONFIG_PM
 242 static int mt7925u_suspend(struct usb_interface *intf, pm_message_t state)
 243 {
 244         struct mt792x_dev *dev = usb_get_intfdata(intf);
 245         struct mt76_connac_pm *pm = &dev->pm;
 246         int err;
 247
 248         pm->suspended = true;
 249         flush_work(&dev->reset_work);
 250
 251         err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);
 252         if (err)
 253                 goto failed;
 254
 255         mt76u_stop_rx(&dev->mt76);
 256         mt76u_stop_tx(&dev->mt76);
 257
 258         return 0;
 259
 260 failed:
 261         pm->suspended = false;
 262
 263         if (err < 0)
 264                 mt792x_reset(&dev->mt76);
 265
 266         return err;
 267 }
 268
 269 static int mt7925u_resume(struct usb_interface *intf)
 270 {
 271         struct mt792x_dev *dev = usb_get_intfdata(intf);
 272         struct mt76_connac_pm *pm = &dev->pm;
 273         bool reinit = true;
 274         int err, i;
 275
 276         for (i = 0; i < 10; i++) {
 277                 u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
 278
 279                 if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
 280                         reinit = false;
 281                         break;
 282                 }
 283                 if (val & MT_WF_SW_SER_DONE_SUSPEND) {
 284                         mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
 285                         break;
 286                 }
 287
 288                 msleep(20);
 289         }
 290
 291         if (reinit || mt792x_dma_need_reinit(dev)) {
 292                 err = mt792xu_dma_init(dev, true);
 293                 if (err)
 294                         goto failed;
 295         }
 296
 297         err = mt76u_resume_rx(&dev->mt76);
 298         if (err < 0)
 299                 goto failed;
 300
 301         err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);
 302 failed:
 303         pm->suspended = false;
 304
 305         if (err < 0)
 306                 mt792x_reset(&dev->mt76);
 307
 308         return err;
 309 }
 310 #endif /* CONFIG_PM */
 311
 312 MODULE_DEVICE_TABLE(usb, mt7925u_device_table);
 313 MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
 314 MODULE_FIRMWARE(MT7925_ROM_PATCH);
 315
 316 static struct usb_driver mt7925u_driver = {
 317         .name           = KBUILD_MODNAME,
 318         .id_table       = mt7925u_device_table,
 319         .probe          = mt7925u_probe,
 320         .disconnect     = mt792xu_disconnect,
 321 #ifdef CONFIG_PM
 322         .suspend        = mt7925u_suspend,
 323         .resume         = mt7925u_resume,
 324         .reset_resume   = mt7925u_resume,
 325 #endif /* CONFIG_PM */
 326         .soft_unbind    = 1,
 327         .disable_hub_initiated_lpm = 1,
 328 };
 329 module_usb_driver(mt7925u_driver);
 330
 331 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
 332 MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver");
 333 MODULE_LICENSE("Dual BSD/GPL");