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
12static 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
18static int
19mt7925u_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
48static 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
72static 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);
121out:
122	clear_bit(MT76_RESET, &dev->mphy.state);
123
124	mt76_worker_enable(&dev->mt76.tx_worker);
125
126	return err;
127}
128
129static 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_assoc = mt7925_mac_sta_assoc,
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
230error:
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
242static 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
260failed:
261	pm->suspended = false;
262
263	if (err < 0)
264		mt792x_reset(&dev->mt76);
265
266	return err;
267}
268
269static 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);
302failed:
303	pm->suspended = false;
304
305	if (err < 0)
306		mt792x_reset(&dev->mt76);
307
308	return err;
309}
310#endif /* CONFIG_PM */
311
312MODULE_DEVICE_TABLE(usb, mt7925u_device_table);
313MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
314MODULE_FIRMWARE(MT7925_ROM_PATCH);
315
316static 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};
329module_usb_driver(mt7925u_driver);
330
331MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
332MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver");
333MODULE_LICENSE("Dual BSD/GPL");
334