1 // SPDX-License-Identifier: BSD-3-Clause-Clear
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, 0x6639, 0xff, 0xff, 0xff),
14 .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
15 { USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7925, 0xff, 0xff, 0xff),
16 .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
17 /* Netgear, Inc. A8500 */
18 { USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9050, 0xff, 0xff, 0xff),
19 .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
20 /* Netgear, Inc. A9000 */
21 { USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9072, 0xff, 0xff, 0xff),
22 .driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
23 { },
24 };
25
26 static int
mt7925u_mcu_send_message(struct mt76_dev * mdev,struct sk_buff * skb,int cmd,int * seq)27 mt7925u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
28 int cmd, int *seq)
29 {
30 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
31 u32 pad, ep;
32 int ret;
33
34 ret = mt7925_mcu_fill_message(mdev, skb, cmd, seq);
35 if (ret)
36 return ret;
37
38 mdev->mcu.timeout = 3 * HZ;
39
40 if (cmd != MCU_CMD(FW_SCATTER))
41 ep = MT_EP_OUT_INBAND_CMD;
42 else
43 ep = MT_EP_OUT_AC_BE;
44
45 mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
46 pad = round_up(skb->len, 4) + 4 - skb->len;
47 __skb_put_zero(skb, pad);
48
49 ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
50 1000, ep);
51 dev_kfree_skb(skb);
52
53 return ret;
54 }
55
mt7925u_mcu_init(struct mt792x_dev * dev)56 static int mt7925u_mcu_init(struct mt792x_dev *dev)
57 {
58 static const struct mt76_mcu_ops mcu_ops = {
59 .headroom = MT_SDIO_HDR_SIZE +
60 sizeof(struct mt76_connac2_mcu_txd),
61 .tailroom = MT_USB_TAIL_SIZE,
62 .mcu_skb_send_msg = mt7925u_mcu_send_message,
63 .mcu_parse_response = mt7925_mcu_parse_response,
64 };
65 int ret;
66
67 dev->mt76.mcu_ops = &mcu_ops;
68
69 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
70 ret = mt7925_run_firmware(dev);
71 if (ret)
72 return ret;
73
74 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
75 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
76
77 return 0;
78 }
79
mt7925u_mac_reset(struct mt792x_dev * dev)80 static int mt7925u_mac_reset(struct mt792x_dev *dev)
81 {
82 int err;
83
84 if (atomic_read(&dev->mt76.bus_hung))
85 return 0;
86
87 mt792xu_reset_on_bus_error(dev);
88 if (atomic_read(&dev->mt76.bus_hung))
89 return 0;
90
91 mt76_txq_schedule_all(&dev->mphy);
92 mt76_worker_disable(&dev->mt76.tx_worker);
93
94 set_bit(MT76_RESET, &dev->mphy.state);
95 set_bit(MT76_MCU_RESET, &dev->mphy.state);
96
97 wake_up(&dev->mt76.mcu.wait);
98 skb_queue_purge(&dev->mt76.mcu.res_q);
99
100 mt76u_stop_rx(&dev->mt76);
101 mt76u_stop_tx(&dev->mt76);
102
103 mt792xu_wfsys_reset(dev);
104
105 clear_bit(MT76_MCU_RESET, &dev->mphy.state);
106 err = mt76u_resume_rx(&dev->mt76);
107 if (err)
108 goto out;
109
110 err = mt792xu_mcu_power_on(dev);
111 if (err)
112 goto out;
113
114 err = mt792xu_dma_init(dev, false);
115 if (err)
116 goto out;
117
118 mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
119 mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
120
121 err = mt7925_run_firmware(dev);
122 if (err)
123 goto out;
124
125 mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
126
127 err = mt7925_mcu_set_eeprom(dev);
128 if (err)
129 goto out;
130
131 err = mt7925_mac_init(dev);
132 if (err)
133 goto out;
134
135 if (is_mt7927(&dev->mt76)) {
136 err = mt7925_mcu_set_dbdc(&dev->mphy, true);
137 if (err)
138 goto out;
139 }
140
141 err = __mt7925_start(&dev->phy);
142 out:
143 clear_bit(MT76_RESET, &dev->mphy.state);
144
145 mt76_worker_enable(&dev->mt76.tx_worker);
146
147 return err;
148 }
149
mt7925u_probe(struct usb_interface * usb_intf,const struct usb_device_id * id)150 static int mt7925u_probe(struct usb_interface *usb_intf,
151 const struct usb_device_id *id)
152 {
153 static const struct mt76_driver_ops drv_ops = {
154 .txwi_size = MT_SDIO_TXD_SIZE,
155 .drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
156 MT_DRV_AMSDU_OFFLOAD,
157 .survey_flags = SURVEY_INFO_TIME_TX |
158 SURVEY_INFO_TIME_RX |
159 SURVEY_INFO_TIME_BSS_RX,
160 .tx_prepare_skb = mt7925_usb_sdio_tx_prepare_skb,
161 .tx_complete_skb = mt7925_usb_sdio_tx_complete_skb,
162 .tx_status_data = mt7925_usb_sdio_tx_status_data,
163 .rx_skb = mt7925_queue_rx_skb,
164 .rx_check = mt7925_rx_check,
165 .sta_add = mt7925_mac_sta_add,
166 .sta_event = mt7925_mac_sta_event,
167 .sta_remove = mt7925_mac_sta_remove,
168 .update_survey = mt792x_update_channel,
169 };
170 static const struct mt792x_hif_ops hif_ops = {
171 .mcu_init = mt7925u_mcu_init,
172 .init_reset = mt792xu_init_reset,
173 .reset = mt7925u_mac_reset,
174 };
175 static struct mt76_bus_ops bus_ops = {
176 .rr = mt792xu_rr,
177 .wr = mt792xu_wr,
178 .rmw = mt792xu_rmw,
179 .read_copy = mt76u_read_copy,
180 .write_copy = mt792xu_copy,
181 .type = MT76_BUS_USB,
182 };
183 struct usb_device *udev = interface_to_usbdev(usb_intf);
184 struct ieee80211_ops *ops;
185 struct ieee80211_hw *hw;
186 struct mt792x_dev *dev;
187 struct mt76_dev *mdev;
188 u8 features;
189 int ret;
190
191 ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7925_ops,
192 (void *)id->driver_info, &features);
193 if (!ops)
194 return -ENOMEM;
195
196 ops->stop = mt792xu_stop;
197
198 mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
199 if (!mdev)
200 return -ENOMEM;
201
202 dev = container_of(mdev, struct mt792x_dev, mt76);
203 dev->fw_features = features;
204 dev->hif_ops = &hif_ops;
205 mt792xu_reset_work_init(dev);
206
207 usb_reset_device(udev);
208
209 usb_set_intfdata(usb_intf, dev);
210
211 ret = __mt76u_init(mdev, usb_intf, &bus_ops);
212 if (ret < 0)
213 goto error;
214
215 mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
216 (mt76_rr(dev, MT_HW_REV) & 0xff);
217 dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
218
219 if (mt76_chip(mdev) == 0x6639) {
220 dev_dbg(mdev->dev,
221 "MT7927 raw CHIPID=0x%04x, forcing chip=0x7927\n",
222 mt76_chip(mdev));
223 mdev->rev = (0x7927 << 16) | (mdev->rev & 0xff);
224 }
225
226 if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
227 ret = mt792xu_wfsys_reset(dev);
228 if (ret)
229 goto error;
230 }
231
232 ret = mt792xu_mcu_power_on(dev);
233 if (ret)
234 goto error;
235
236 ret = mt76u_alloc_mcu_queue(&dev->mt76);
237 if (ret)
238 goto error;
239
240 ret = mt76u_alloc_queues(&dev->mt76);
241 if (ret)
242 goto error;
243
244 ret = mt792xu_dma_init(dev, false);
245 if (ret)
246 goto error;
247
248 hw = mt76_hw(dev);
249 /* check hw sg support in order to enable AMSDU */
250 hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
251
252 ret = mt7925_register_device(dev);
253 if (ret)
254 goto error;
255
256 return 0;
257
258 error:
259 mt76u_queues_deinit(&dev->mt76);
260 mt792xu_reset_work_cleanup(dev);
261
262 usb_set_intfdata(usb_intf, NULL);
263
264 mt76_free_device(&dev->mt76);
265
266 return ret;
267 }
268
269 #ifdef CONFIG_PM
mt7925u_suspend(struct usb_interface * intf,pm_message_t state)270 static int mt7925u_suspend(struct usb_interface *intf, pm_message_t state)
271 {
272 struct mt792x_dev *dev = usb_get_intfdata(intf);
273 struct mt76_connac_pm *pm = &dev->pm;
274 int err, ret;
275
276 pm->suspended = true;
277 dev->hif_resumed = false;
278 flush_work(&dev->reset_work);
279 cancel_delayed_work_sync(&dev->mlo_pm_work);
280
281 mt76_connac_mcu_set_hif_suspend(&dev->mt76, true, false);
282 ret = wait_event_timeout(dev->wait,
283 dev->hif_idle, 3 * HZ);
284 if (!ret) {
285 err = -ETIMEDOUT;
286 goto failed;
287 }
288
289 mt76u_stop_rx(&dev->mt76);
290 mt76u_stop_tx(&dev->mt76);
291
292 return 0;
293
294 failed:
295 pm->suspended = false;
296
297 if (err < 0)
298 mt792x_reset(&dev->mt76);
299
300 return err;
301 }
302
mt7925u_resume(struct usb_interface * intf)303 static int mt7925u_resume(struct usb_interface *intf)
304 {
305 struct mt792x_dev *dev = usb_get_intfdata(intf);
306 struct mt76_connac_pm *pm = &dev->pm;
307 bool reinit = true;
308 int err, i, ret;
309
310 dev->hif_idle = false;
311 for (i = 0; i < 10; i++) {
312 u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
313
314 if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
315 reinit = false;
316 break;
317 }
318 if (val & MT_WF_SW_SER_DONE_SUSPEND) {
319 mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
320 break;
321 }
322
323 msleep(20);
324 }
325
326 if (reinit || mt792x_dma_need_reinit(dev)) {
327 err = mt792xu_dma_init(dev, true);
328 if (err)
329 goto failed;
330 }
331
332 err = mt76u_resume_rx(&dev->mt76);
333 if (err < 0)
334 goto failed;
335
336 mt76_connac_mcu_set_hif_suspend(&dev->mt76, false, false);
337 ret = wait_event_timeout(dev->wait,
338 dev->hif_resumed, 3 * HZ);
339 if (!ret)
340 err = -ETIMEDOUT;
341 failed:
342 pm->suspended = false;
343
344 if (err < 0)
345 mt792x_reset(&dev->mt76);
346
347 return err;
348 }
349 #endif /* CONFIG_PM */
350
351 MODULE_DEVICE_TABLE(usb, mt7925u_device_table);
352 MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
353 MODULE_FIRMWARE(MT7925_ROM_PATCH);
354
355 static struct usb_driver mt7925u_driver = {
356 .name = KBUILD_MODNAME,
357 .id_table = mt7925u_device_table,
358 .probe = mt7925u_probe,
359 .disconnect = mt792xu_disconnect,
360 #ifdef CONFIG_PM
361 .suspend = mt7925u_suspend,
362 .resume = mt7925u_resume,
363 .reset_resume = mt7925u_resume,
364 #endif /* CONFIG_PM */
365 .soft_unbind = 1,
366 .disable_hub_initiated_lpm = 1,
367 };
368 module_usb_driver(mt7925u_driver);
369
370 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
371 MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver");
372 MODULE_LICENSE("Dual BSD/GPL");
373