1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2022 MediaTek Inc.
3 *
4 * Author: Lorenzo Bianconi <[email protected]>
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 /* TP-Link TXE50UH */
25 { USB_DEVICE_AND_INTERFACE_INFO(0x35bc, 0x0107, 0xff, 0xff, 0xff),
26 .driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
27 { },
28 };
29
30 static int
mt7921u_mcu_send_message(struct mt76_dev * mdev,struct sk_buff * skb,int cmd,int * seq)31 mt7921u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
32 int cmd, int *seq)
33 {
34 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
35 u32 pad, ep;
36 int ret;
37
38 ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);
39 if (ret)
40 return ret;
41
42 mdev->mcu.timeout = 3 * HZ;
43
44 if (cmd != MCU_CMD(FW_SCATTER))
45 ep = MT_EP_OUT_INBAND_CMD;
46 else
47 ep = MT_EP_OUT_AC_BE;
48
49 mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
50 pad = round_up(skb->len, 4) + 4 - skb->len;
51 __skb_put_zero(skb, pad);
52
53 ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
54 1000, ep);
55 dev_kfree_skb(skb);
56
57 return ret;
58 }
59
mt7921u_mcu_init(struct mt792x_dev * dev)60 static int mt7921u_mcu_init(struct mt792x_dev *dev)
61 {
62 static const struct mt76_mcu_ops mcu_ops = {
63 .headroom = MT_SDIO_HDR_SIZE +
64 sizeof(struct mt76_connac2_mcu_txd),
65 .tailroom = MT_USB_TAIL_SIZE,
66 .mcu_skb_send_msg = mt7921u_mcu_send_message,
67 .mcu_parse_response = mt7921_mcu_parse_response,
68 };
69 int ret;
70
71 dev->mt76.mcu_ops = &mcu_ops;
72
73 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
74 ret = mt7921_run_firmware(dev);
75 if (ret)
76 return ret;
77
78 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
79 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
80
81 return 0;
82 }
83
mt7921u_mac_reset(struct mt792x_dev * dev)84 static int mt7921u_mac_reset(struct mt792x_dev *dev)
85 {
86 int err;
87
88 mt76_txq_schedule_all(&dev->mphy);
89 mt76_worker_disable(&dev->mt76.tx_worker);
90
91 set_bit(MT76_RESET, &dev->mphy.state);
92 set_bit(MT76_MCU_RESET, &dev->mphy.state);
93
94 wake_up(&dev->mt76.mcu.wait);
95 skb_queue_purge(&dev->mt76.mcu.res_q);
96
97 mt76u_stop_rx(&dev->mt76);
98 mt76u_stop_tx(&dev->mt76);
99
100 mt792xu_wfsys_reset(dev);
101
102 clear_bit(MT76_MCU_RESET, &dev->mphy.state);
103 err = mt76u_resume_rx(&dev->mt76);
104 if (err)
105 goto out;
106
107 err = mt792xu_mcu_power_on(dev);
108 if (err)
109 goto out;
110
111 err = mt792xu_dma_init(dev, false);
112 if (err)
113 goto out;
114
115 mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
116 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
117
118 err = mt7921_run_firmware(dev);
119 if (err)
120 goto out;
121
122 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
123
124 err = mt7921_mcu_set_eeprom(dev);
125 if (err)
126 goto out;
127
128 err = mt7921_mac_init(dev);
129 if (err)
130 goto out;
131
132 err = __mt7921_start(&dev->phy);
133 out:
134 clear_bit(MT76_RESET, &dev->mphy.state);
135
136 mt76_worker_enable(&dev->mt76.tx_worker);
137
138 return err;
139 }
140
mt7921u_probe(struct usb_interface * usb_intf,const struct usb_device_id * id)141 static int mt7921u_probe(struct usb_interface *usb_intf,
142 const struct usb_device_id *id)
143 {
144 static const struct mt76_driver_ops drv_ops = {
145 .txwi_size = MT_SDIO_TXD_SIZE,
146 .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
147 MT_DRV_AMSDU_OFFLOAD,
148 .survey_flags = SURVEY_INFO_TIME_TX |
149 SURVEY_INFO_TIME_RX |
150 SURVEY_INFO_TIME_BSS_RX,
151 .tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
152 .tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
153 .tx_status_data = mt7921_usb_sdio_tx_status_data,
154 .rx_skb = mt7921_queue_rx_skb,
155 .rx_check = mt7921_rx_check,
156 .sta_add = mt7921_mac_sta_add,
157 .sta_event = mt7921_mac_sta_event,
158 .sta_remove = mt7921_mac_sta_remove,
159 .update_survey = mt792x_update_channel,
160 .set_channel = mt7921_set_channel,
161 };
162 static const struct mt792x_hif_ops hif_ops = {
163 .mcu_init = mt7921u_mcu_init,
164 .init_reset = mt792xu_init_reset,
165 .reset = mt7921u_mac_reset,
166 };
167 static struct mt76_bus_ops bus_ops = {
168 .rr = mt792xu_rr,
169 .wr = mt792xu_wr,
170 .rmw = mt792xu_rmw,
171 .read_copy = mt76u_read_copy,
172 .write_copy = mt792xu_copy,
173 .type = MT76_BUS_USB,
174 };
175 struct usb_device *udev = interface_to_usbdev(usb_intf);
176 struct ieee80211_ops *ops;
177 struct ieee80211_hw *hw;
178 struct mt792x_dev *dev;
179 struct mt76_dev *mdev;
180 u8 features;
181 int ret;
182
183 ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7921_ops,
184 (void *)id->driver_info, &features);
185 if (!ops)
186 return -ENOMEM;
187
188 ops->stop = mt792xu_stop;
189 mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
190 if (!mdev)
191 return -ENOMEM;
192
193 dev = container_of(mdev, struct mt792x_dev, mt76);
194 dev->fw_features = features;
195 dev->hif_ops = &hif_ops;
196
197 udev = usb_get_dev(udev);
198 usb_reset_device(udev);
199
200 usb_set_intfdata(usb_intf, dev);
201
202 ret = __mt76u_init(mdev, usb_intf, &bus_ops);
203 if (ret < 0)
204 goto error;
205
206 mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
207 (mt76_rr(dev, MT_HW_REV) & 0xff);
208 dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
209
210 if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
211 ret = mt792xu_wfsys_reset(dev);
212 if (ret)
213 goto error;
214 }
215
216 ret = mt792xu_mcu_power_on(dev);
217 if (ret)
218 goto error;
219
220 ret = mt76u_alloc_mcu_queue(&dev->mt76);
221 if (ret)
222 goto error;
223
224 ret = mt76u_alloc_queues(&dev->mt76);
225 if (ret)
226 goto error;
227
228 ret = mt792xu_dma_init(dev, false);
229 if (ret)
230 goto error;
231
232 hw = mt76_hw(dev);
233 /* check hw sg support in order to enable AMSDU */
234 hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
235
236 ret = mt7921_register_device(dev);
237 if (ret)
238 goto error;
239
240 return 0;
241
242 error:
243 mt76u_queues_deinit(&dev->mt76);
244
245 usb_set_intfdata(usb_intf, NULL);
246 usb_put_dev(interface_to_usbdev(usb_intf));
247
248 mt76_free_device(&dev->mt76);
249
250 return ret;
251 }
252
253 #ifdef CONFIG_PM
mt7921u_suspend(struct usb_interface * intf,pm_message_t state)254 static int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)
255 {
256 struct mt792x_dev *dev = usb_get_intfdata(intf);
257 struct mt76_connac_pm *pm = &dev->pm;
258 int err;
259
260 pm->suspended = true;
261 flush_work(&dev->reset_work);
262
263 err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true, true);
264 if (err)
265 goto failed;
266
267 mt76u_stop_rx(&dev->mt76);
268 mt76u_stop_tx(&dev->mt76);
269
270 return 0;
271
272 failed:
273 pm->suspended = false;
274
275 if (err < 0)
276 mt792x_reset(&dev->mt76);
277
278 return err;
279 }
280
mt7921u_resume(struct usb_interface * intf)281 static int mt7921u_resume(struct usb_interface *intf)
282 {
283 struct mt792x_dev *dev = usb_get_intfdata(intf);
284 struct mt76_connac_pm *pm = &dev->pm;
285 bool reinit = true;
286 int err, i;
287
288 for (i = 0; i < 10; i++) {
289 u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
290
291 if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
292 reinit = false;
293 break;
294 }
295 if (val & MT_WF_SW_SER_DONE_SUSPEND) {
296 mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
297 break;
298 }
299
300 msleep(20);
301 }
302
303 if (reinit || mt792x_dma_need_reinit(dev)) {
304 err = mt792xu_dma_init(dev, true);
305 if (err)
306 goto failed;
307 }
308
309 err = mt76u_resume_rx(&dev->mt76);
310 if (err < 0)
311 goto failed;
312
313 err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false, true);
314 failed:
315 pm->suspended = false;
316
317 if (err < 0)
318 mt792x_reset(&dev->mt76);
319
320 return err;
321 }
322 #endif /* CONFIG_PM */
323
324 MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
325 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
326 MODULE_FIRMWARE(MT7921_ROM_PATCH);
327
328 static struct usb_driver mt7921u_driver = {
329 .name = KBUILD_MODNAME,
330 .id_table = mt7921u_device_table,
331 .probe = mt7921u_probe,
332 .disconnect = mt792xu_disconnect,
333 #ifdef CONFIG_PM
334 .suspend = mt7921u_suspend,
335 .resume = mt7921u_resume,
336 .reset_resume = mt7921u_resume,
337 #endif /* CONFIG_PM */
338 .soft_unbind = 1,
339 .disable_hub_initiated_lpm = 1,
340 };
341 module_usb_driver(mt7921u_driver);
342
343 MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");
344 MODULE_AUTHOR("Lorenzo Bianconi <[email protected]>");
345 MODULE_LICENSE("Dual BSD/GPL");
346