xref: /linux/drivers/net/wireless/mediatek/mt76/mt7921/usb.c (revision 6d9b262afe0ec1d6e0ef99321ca9d6b921310471)
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_assoc = mt7921_mac_sta_assoc,
155 		.sta_remove = mt7921_mac_sta_remove,
156 		.update_survey = mt792x_update_channel,
157 	};
158 	static const struct mt792x_hif_ops hif_ops = {
159 		.mcu_init = mt7921u_mcu_init,
160 		.init_reset = mt792xu_init_reset,
161 		.reset = mt7921u_mac_reset,
162 	};
163 	static struct mt76_bus_ops bus_ops = {
164 		.rr = mt792xu_rr,
165 		.wr = mt792xu_wr,
166 		.rmw = mt792xu_rmw,
167 		.read_copy = mt76u_read_copy,
168 		.write_copy = mt792xu_copy,
169 		.type = MT76_BUS_USB,
170 	};
171 	struct usb_device *udev = interface_to_usbdev(usb_intf);
172 	struct ieee80211_ops *ops;
173 	struct ieee80211_hw *hw;
174 	struct mt792x_dev *dev;
175 	struct mt76_dev *mdev;
176 	u8 features;
177 	int ret;
178 
179 	ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7921_ops,
180 				      (void *)id->driver_info, &features);
181 	if (!ops)
182 		return -ENOMEM;
183 
184 	ops->stop = mt792xu_stop;
185 	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
186 	if (!mdev)
187 		return -ENOMEM;
188 
189 	dev = container_of(mdev, struct mt792x_dev, mt76);
190 	dev->fw_features = features;
191 	dev->hif_ops = &hif_ops;
192 
193 	udev = usb_get_dev(udev);
194 	usb_reset_device(udev);
195 
196 	usb_set_intfdata(usb_intf, dev);
197 
198 	ret = __mt76u_init(mdev, usb_intf, &bus_ops);
199 	if (ret < 0)
200 		goto error;
201 
202 	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
203 		    (mt76_rr(dev, MT_HW_REV) & 0xff);
204 	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
205 
206 	if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
207 		ret = mt792xu_wfsys_reset(dev);
208 		if (ret)
209 			goto error;
210 	}
211 
212 	ret = mt792xu_mcu_power_on(dev);
213 	if (ret)
214 		goto error;
215 
216 	ret = mt76u_alloc_mcu_queue(&dev->mt76);
217 	if (ret)
218 		goto error;
219 
220 	ret = mt76u_alloc_queues(&dev->mt76);
221 	if (ret)
222 		goto error;
223 
224 	ret = mt792xu_dma_init(dev, false);
225 	if (ret)
226 		goto error;
227 
228 	hw = mt76_hw(dev);
229 	/* check hw sg support in order to enable AMSDU */
230 	hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
231 
232 	ret = mt7921_register_device(dev);
233 	if (ret)
234 		goto error;
235 
236 	return 0;
237 
238 error:
239 	mt76u_queues_deinit(&dev->mt76);
240 
241 	usb_set_intfdata(usb_intf, NULL);
242 	usb_put_dev(interface_to_usbdev(usb_intf));
243 
244 	mt76_free_device(&dev->mt76);
245 
246 	return ret;
247 }
248 
249 #ifdef CONFIG_PM
250 static int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)
251 {
252 	struct mt792x_dev *dev = usb_get_intfdata(intf);
253 	struct mt76_connac_pm *pm = &dev->pm;
254 	int err;
255 
256 	pm->suspended = true;
257 	flush_work(&dev->reset_work);
258 
259 	err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true);
260 	if (err)
261 		goto failed;
262 
263 	mt76u_stop_rx(&dev->mt76);
264 	mt76u_stop_tx(&dev->mt76);
265 
266 	return 0;
267 
268 failed:
269 	pm->suspended = false;
270 
271 	if (err < 0)
272 		mt792x_reset(&dev->mt76);
273 
274 	return err;
275 }
276 
277 static int mt7921u_resume(struct usb_interface *intf)
278 {
279 	struct mt792x_dev *dev = usb_get_intfdata(intf);
280 	struct mt76_connac_pm *pm = &dev->pm;
281 	bool reinit = true;
282 	int err, i;
283 
284 	for (i = 0; i < 10; i++) {
285 		u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
286 
287 		if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
288 			reinit = false;
289 			break;
290 		}
291 		if (val & MT_WF_SW_SER_DONE_SUSPEND) {
292 			mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
293 			break;
294 		}
295 
296 		msleep(20);
297 	}
298 
299 	if (reinit || mt792x_dma_need_reinit(dev)) {
300 		err = mt792xu_dma_init(dev, true);
301 		if (err)
302 			goto failed;
303 	}
304 
305 	err = mt76u_resume_rx(&dev->mt76);
306 	if (err < 0)
307 		goto failed;
308 
309 	err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false);
310 failed:
311 	pm->suspended = false;
312 
313 	if (err < 0)
314 		mt792x_reset(&dev->mt76);
315 
316 	return err;
317 }
318 #endif /* CONFIG_PM */
319 
320 MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
321 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
322 MODULE_FIRMWARE(MT7921_ROM_PATCH);
323 
324 static struct usb_driver mt7921u_driver = {
325 	.name		= KBUILD_MODNAME,
326 	.id_table	= mt7921u_device_table,
327 	.probe		= mt7921u_probe,
328 	.disconnect	= mt792xu_disconnect,
329 #ifdef CONFIG_PM
330 	.suspend	= mt7921u_suspend,
331 	.resume		= mt7921u_resume,
332 	.reset_resume	= mt7921u_resume,
333 #endif /* CONFIG_PM */
334 	.soft_unbind	= 1,
335 	.disable_hub_initiated_lpm = 1,
336 };
337 module_usb_driver(mt7921u_driver);
338 
339 MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");
340 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
341 MODULE_LICENSE("Dual BSD/GPL");
342