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"); 343