usb.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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	/* Netgear, Inc. A7500 */
 25	{ USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9065, 0xff, 0xff, 0xff),
 26		.driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
 27	/* TP-Link TXE50UH */
 28	{ USB_DEVICE_AND_INTERFACE_INFO(0x35bc, 0x0107, 0xff, 0xff, 0xff),
 29		.driver_info = (kernel_ulong_t)MT7921_FIRMWARE_WM },
 30	{ },
 31};
 32
 33static int
 34mt7921u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
 35			 int cmd, int *seq)
 36{
 37	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
 38	u32 pad, ep;
 39	int ret;
 40
 41	ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);
 42	if (ret)
 43		return ret;
 44
 45	mdev->mcu.timeout = 3 * HZ;
 46
 47	if (cmd != MCU_CMD(FW_SCATTER))
 48		ep = MT_EP_OUT_INBAND_CMD;
 49	else
 50		ep = MT_EP_OUT_AC_BE;
 51
 52	mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
 53	pad = round_up(skb->len, 4) + 4 - skb->len;
 54	__skb_put_zero(skb, pad);
 55
 56	ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
 57			     1000, ep);
 58	dev_kfree_skb(skb);
 59
 60	return ret;
 61}
 62
 63static int mt7921u_mcu_init(struct mt792x_dev *dev)
 64{
 65	static const struct mt76_mcu_ops mcu_ops = {
 66		.headroom = MT_SDIO_HDR_SIZE +
 67			    sizeof(struct mt76_connac2_mcu_txd),
 68		.tailroom = MT_USB_TAIL_SIZE,
 69		.mcu_skb_send_msg = mt7921u_mcu_send_message,
 70		.mcu_parse_response = mt7921_mcu_parse_response,
 71	};
 72	int ret;
 73
 74	dev->mt76.mcu_ops = &mcu_ops;
 75
 76	mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 77	ret = mt7921_run_firmware(dev);
 78	if (ret)
 79		return ret;
 80
 81	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
 82	mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 83
 84	return 0;
 85}
 86
 87static int mt7921u_mac_reset(struct mt792x_dev *dev)
 88{
 89	int err;
 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 = mt7921_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 = mt7921_mcu_set_eeprom(dev);
128	if (err)
129		goto out;
130
131	err = mt7921_mac_init(dev);
132	if (err)
133		goto out;
134
135	err = __mt7921_start(&dev->phy);
136out:
137	clear_bit(MT76_RESET, &dev->mphy.state);
138
139	mt76_worker_enable(&dev->mt76.tx_worker);
140
141	return err;
142}
143
144static int mt7921u_probe(struct usb_interface *usb_intf,
145			 const struct usb_device_id *id)
146{
147	static const struct mt76_driver_ops drv_ops = {
148		.txwi_size = MT_SDIO_TXD_SIZE,
149		.drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
150			     MT_DRV_AMSDU_OFFLOAD,
151		.survey_flags = SURVEY_INFO_TIME_TX |
152				SURVEY_INFO_TIME_RX |
153				SURVEY_INFO_TIME_BSS_RX,
154		.tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
155		.tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
156		.tx_status_data = mt7921_usb_sdio_tx_status_data,
157		.rx_skb = mt7921_queue_rx_skb,
158		.rx_check = mt7921_rx_check,
159		.sta_add = mt7921_mac_sta_add,
160		.sta_event = mt7921_mac_sta_event,
161		.sta_remove = mt7921_mac_sta_remove,
162		.update_survey = mt792x_update_channel,
163		.set_channel = mt7921_set_channel,
164	};
165	static const struct mt792x_hif_ops hif_ops = {
166		.mcu_init = mt7921u_mcu_init,
167		.init_reset = mt792xu_init_reset,
168		.reset = mt7921u_mac_reset,
169	};
170	static struct mt76_bus_ops bus_ops = {
171		.rr = mt792xu_rr,
172		.wr = mt792xu_wr,
173		.rmw = mt792xu_rmw,
174		.read_copy = mt76u_read_copy,
175		.write_copy = mt792xu_copy,
176		.type = MT76_BUS_USB,
177	};
178	struct usb_device *udev = interface_to_usbdev(usb_intf);
179	struct ieee80211_ops *ops;
180	struct ieee80211_hw *hw;
181	struct mt792x_dev *dev;
182	struct mt76_dev *mdev;
183	u8 features;
184	int ret;
185
186	ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7921_ops,
187				      (void *)id->driver_info, &features);
188	if (!ops)
189		return -ENOMEM;
190
191	ops->stop = mt792xu_stop;
192	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
193	if (!mdev)
194		return -ENOMEM;
195
196	dev = container_of(mdev, struct mt792x_dev, mt76);
197	dev->fw_features = features;
198	dev->hif_ops = &hif_ops;
199
200	udev = usb_get_dev(udev);
201	usb_reset_device(udev);
202
203	usb_set_intfdata(usb_intf, dev);
204
205	ret = __mt76u_init(mdev, usb_intf, &bus_ops);
206	if (ret < 0)
207		goto error;
208
209	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
210		    (mt76_rr(dev, MT_HW_REV) & 0xff);
211	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
212
213	if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
214		ret = mt792xu_wfsys_reset(dev);
215		if (ret)
216			goto error;
217	}
218
219	ret = mt792xu_mcu_power_on(dev);
220	if (ret)
221		goto error;
222
223	ret = mt76u_alloc_mcu_queue(&dev->mt76);
224	if (ret)
225		goto error;
226
227	ret = mt76u_alloc_queues(&dev->mt76);
228	if (ret)
229		goto error;
230
231	ret = mt792xu_dma_init(dev, false);
232	if (ret)
233		goto error;
234
235	hw = mt76_hw(dev);
236	/* check hw sg support in order to enable AMSDU */
237	hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
238
239	ret = mt7921_register_device(dev);
240	if (ret)
241		goto error;
242
243	return 0;
244
245error:
246	mt76u_queues_deinit(&dev->mt76);
247
248	usb_set_intfdata(usb_intf, NULL);
249	usb_put_dev(interface_to_usbdev(usb_intf));
250
251	mt76_free_device(&dev->mt76);
252
253	return ret;
254}
255
256#ifdef CONFIG_PM
257static int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)
258{
259	struct mt792x_dev *dev = usb_get_intfdata(intf);
260	struct mt76_connac_pm *pm = &dev->pm;
261	int err;
262
263	pm->suspended = true;
264	flush_work(&dev->reset_work);
265
266	err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, true, true);
267	if (err)
268		goto failed;
269
270	mt76u_stop_rx(&dev->mt76);
271	mt76u_stop_tx(&dev->mt76);
272
273	return 0;
274
275failed:
276	pm->suspended = false;
277
278	if (err < 0)
279		mt792x_reset(&dev->mt76);
280
281	return err;
282}
283
284static int mt7921u_resume(struct usb_interface *intf)
285{
286	struct mt792x_dev *dev = usb_get_intfdata(intf);
287	struct mt76_connac_pm *pm = &dev->pm;
288	bool reinit = true;
289	int err, i;
290
291	for (i = 0; i < 10; i++) {
292		u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
293
294		if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
295			reinit = false;
296			break;
297		}
298		if (val & MT_WF_SW_SER_DONE_SUSPEND) {
299			mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
300			break;
301		}
302
303		msleep(20);
304	}
305
306	if (reinit || mt792x_dma_need_reinit(dev)) {
307		err = mt792xu_dma_init(dev, true);
308		if (err)
309			goto failed;
310	}
311
312	err = mt76u_resume_rx(&dev->mt76);
313	if (err < 0)
314		goto failed;
315
316	err = mt76_connac_mcu_set_hif_suspend(&dev->mt76, false, true);
317failed:
318	pm->suspended = false;
319
320	if (err < 0)
321		mt792x_reset(&dev->mt76);
322
323	return err;
324}
325#endif /* CONFIG_PM */
326
327MODULE_DEVICE_TABLE(usb, mt7921u_device_table);
328MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
329MODULE_FIRMWARE(MT7921_ROM_PATCH);
330
331static struct usb_driver mt7921u_driver = {
332	.name		= KBUILD_MODNAME,
333	.id_table	= mt7921u_device_table,
334	.probe		= mt7921u_probe,
335	.disconnect	= mt792xu_disconnect,
336#ifdef CONFIG_PM
337	.suspend	= mt7921u_suspend,
338	.resume		= mt7921u_resume,
339	.reset_resume	= mt7921u_resume,
340#endif /* CONFIG_PM */
341	.soft_unbind	= 1,
342	.disable_hub_initiated_lpm = 1,
343};
344module_usb_driver(mt7921u_driver);
345
346MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver");
347MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
348MODULE_LICENSE("Dual BSD/GPL");