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
15static 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
27static int
28mt7921u_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
57static 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
81static 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);
130out:
131	clear_bit(MT76_RESET, &dev->mphy.state);
132
133	mt76_worker_enable(&dev->mt76.tx_worker);
134
135	return err;
136}
137
138static 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
238error:
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
250static 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
268failed:
269	pm->suspended = false;
270
271	if (err < 0)
272		mt792x_reset(&dev->mt76);
273
274	return err;
275}
276
277static 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);
310failed:
311	pm->suspended = false;
312
313	if (err < 0)
314		mt792x_reset(&dev->mt76);
315
316	return err;
317}
318#endif /* CONFIG_PM */
319
320MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
321MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
322MODULE_FIRMWARE(MT7921_ROM_PATCH);
323
324static 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};
337module_usb_driver(mt7921u_driver);
338
339MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");
340MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
341MODULE_LICENSE("Dual BSD/GPL");
342