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
mt7925u_mcu_send_message(struct mt76_dev * mdev,struct sk_buff * skb,int cmd,int * seq)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
mt7925u_mcu_init(struct mt792x_dev * dev)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
mt7925u_mac_reset(struct mt792x_dev * dev)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
mt7925u_probe(struct usb_interface * usb_intf,const struct usb_device_id * id)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
mt7925u_suspend(struct usb_interface * intf,pm_message_t state)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
mt7925u_resume(struct usb_interface * intf)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");
334