usb.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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	/* Netgear, Inc. A9000 */
 16	{ USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9072, 0xff, 0xff, 0xff),
 17		.driver_info = (kernel_ulong_t)MT7925_FIRMWARE_WM },
 18	{ },
 19};
 20
 21static int
 22mt7925u_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
 23			 int cmd, int *seq)
 24{
 25	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
 26	u32 pad, ep;
 27	int ret;
 28
 29	ret = mt7925_mcu_fill_message(mdev, skb, cmd, seq);
 30	if (ret)
 31		return ret;
 32
 33	mdev->mcu.timeout = 3 * HZ;
 34
 35	if (cmd != MCU_CMD(FW_SCATTER))
 36		ep = MT_EP_OUT_INBAND_CMD;
 37	else
 38		ep = MT_EP_OUT_AC_BE;
 39
 40	mt792x_skb_add_usb_sdio_hdr(dev, skb, 0);
 41	pad = round_up(skb->len, 4) + 4 - skb->len;
 42	__skb_put_zero(skb, pad);
 43
 44	ret = mt76u_bulk_msg(&dev->mt76, skb->data, skb->len, NULL,
 45			     1000, ep);
 46	dev_kfree_skb(skb);
 47
 48	return ret;
 49}
 50
 51static int mt7925u_mcu_init(struct mt792x_dev *dev)
 52{
 53	static const struct mt76_mcu_ops mcu_ops = {
 54		.headroom = MT_SDIO_HDR_SIZE +
 55			    sizeof(struct mt76_connac2_mcu_txd),
 56		.tailroom = MT_USB_TAIL_SIZE,
 57		.mcu_skb_send_msg = mt7925u_mcu_send_message,
 58		.mcu_parse_response = mt7925_mcu_parse_response,
 59	};
 60	int ret;
 61
 62	dev->mt76.mcu_ops = &mcu_ops;
 63
 64	mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 65	ret = mt7925_run_firmware(dev);
 66	if (ret)
 67		return ret;
 68
 69	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
 70	mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
 71
 72	return 0;
 73}
 74
 75static int mt7925u_mac_reset(struct mt792x_dev *dev)
 76{
 77	int err;
 78
 79	mt76_txq_schedule_all(&dev->mphy);
 80	mt76_worker_disable(&dev->mt76.tx_worker);
 81
 82	set_bit(MT76_RESET, &dev->mphy.state);
 83	set_bit(MT76_MCU_RESET, &dev->mphy.state);
 84
 85	wake_up(&dev->mt76.mcu.wait);
 86	skb_queue_purge(&dev->mt76.mcu.res_q);
 87
 88	mt76u_stop_rx(&dev->mt76);
 89	mt76u_stop_tx(&dev->mt76);
 90
 91	mt792xu_wfsys_reset(dev);
 92
 93	clear_bit(MT76_MCU_RESET, &dev->mphy.state);
 94	err = mt76u_resume_rx(&dev->mt76);
 95	if (err)
 96		goto out;
 97
 98	err = mt792xu_mcu_power_on(dev);
 99	if (err)
100		goto out;
101
102	err = mt792xu_dma_init(dev, false);
103	if (err)
104		goto out;
105
106	mt76_wr(dev, MT_SWDEF_MODE, MT_SWDEF_NORMAL_MODE);
107	mt76_set(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
108
109	err = mt7925_run_firmware(dev);
110	if (err)
111		goto out;
112
113	mt76_clear(dev, MT_UDMA_TX_QSEL, MT_FW_DL_EN);
114
115	err = mt7925_mcu_set_eeprom(dev);
116	if (err)
117		goto out;
118
119	err = mt7925_mac_init(dev);
120	if (err)
121		goto out;
122
123	err = __mt7925_start(&dev->phy);
124out:
125	clear_bit(MT76_RESET, &dev->mphy.state);
126
127	mt76_worker_enable(&dev->mt76.tx_worker);
128
129	return err;
130}
131
132static int mt7925u_probe(struct usb_interface *usb_intf,
133			 const struct usb_device_id *id)
134{
135	static const struct mt76_driver_ops drv_ops = {
136		.txwi_size = MT_SDIO_TXD_SIZE,
137		.drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ |
138			     MT_DRV_AMSDU_OFFLOAD,
139		.survey_flags = SURVEY_INFO_TIME_TX |
140				SURVEY_INFO_TIME_RX |
141				SURVEY_INFO_TIME_BSS_RX,
142		.tx_prepare_skb = mt7925_usb_sdio_tx_prepare_skb,
143		.tx_complete_skb = mt7925_usb_sdio_tx_complete_skb,
144		.tx_status_data = mt7925_usb_sdio_tx_status_data,
145		.rx_skb = mt7925_queue_rx_skb,
146		.rx_check = mt7925_rx_check,
147		.sta_add = mt7925_mac_sta_add,
148		.sta_event = mt7925_mac_sta_event,
149		.sta_remove = mt7925_mac_sta_remove,
150		.update_survey = mt792x_update_channel,
151	};
152	static const struct mt792x_hif_ops hif_ops = {
153		.mcu_init = mt7925u_mcu_init,
154		.init_reset = mt792xu_init_reset,
155		.reset = mt7925u_mac_reset,
156	};
157	static struct mt76_bus_ops bus_ops = {
158		.rr = mt792xu_rr,
159		.wr = mt792xu_wr,
160		.rmw = mt792xu_rmw,
161		.read_copy = mt76u_read_copy,
162		.write_copy = mt792xu_copy,
163		.type = MT76_BUS_USB,
164	};
165	struct usb_device *udev = interface_to_usbdev(usb_intf);
166	struct ieee80211_ops *ops;
167	struct ieee80211_hw *hw;
168	struct mt792x_dev *dev;
169	struct mt76_dev *mdev;
170	u8 features;
171	int ret;
172
173	ops = mt792x_get_mac80211_ops(&usb_intf->dev, &mt7925_ops,
174				      (void *)id->driver_info, &features);
175	if (!ops)
176		return -ENOMEM;
177
178	ops->stop = mt792xu_stop;
179
180	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
181	if (!mdev)
182		return -ENOMEM;
183
184	dev = container_of(mdev, struct mt792x_dev, mt76);
185	dev->fw_features = features;
186	dev->hif_ops = &hif_ops;
187
188	udev = usb_get_dev(udev);
189	usb_reset_device(udev);
190
191	usb_set_intfdata(usb_intf, dev);
192
193	ret = __mt76u_init(mdev, usb_intf, &bus_ops);
194	if (ret < 0)
195		goto error;
196
197	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
198		    (mt76_rr(dev, MT_HW_REV) & 0xff);
199	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
200
201	if (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {
202		ret = mt792xu_wfsys_reset(dev);
203		if (ret)
204			goto error;
205	}
206
207	ret = mt792xu_mcu_power_on(dev);
208	if (ret)
209		goto error;
210
211	ret = mt76u_alloc_mcu_queue(&dev->mt76);
212	if (ret)
213		goto error;
214
215	ret = mt76u_alloc_queues(&dev->mt76);
216	if (ret)
217		goto error;
218
219	ret = mt792xu_dma_init(dev, false);
220	if (ret)
221		goto error;
222
223	hw = mt76_hw(dev);
224	/* check hw sg support in order to enable AMSDU */
225	hw->max_tx_fragments = mdev->usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
226
227	ret = mt7925_register_device(dev);
228	if (ret)
229		goto error;
230
231	return 0;
232
233error:
234	mt76u_queues_deinit(&dev->mt76);
235
236	usb_set_intfdata(usb_intf, NULL);
237	usb_put_dev(interface_to_usbdev(usb_intf));
238
239	mt76_free_device(&dev->mt76);
240
241	return ret;
242}
243
244#ifdef CONFIG_PM
245static int mt7925u_suspend(struct usb_interface *intf, pm_message_t state)
246{
247	struct mt792x_dev *dev = usb_get_intfdata(intf);
248	struct mt76_connac_pm *pm = &dev->pm;
249	int err, ret;
250
251	pm->suspended = true;
252	dev->hif_resumed = false;
253	flush_work(&dev->reset_work);
254
255	mt76_connac_mcu_set_hif_suspend(&dev->mt76, true, false);
256	ret = wait_event_timeout(dev->wait,
257				 dev->hif_idle, 3 * HZ);
258	if (!ret) {
259		err = -ETIMEDOUT;
260		goto failed;
261	}
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 mt7925u_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, ret;
283
284	dev->hif_idle = false;
285	for (i = 0; i < 10; i++) {
286		u32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);
287
288		if (!(val & MT_WF_SW_SER_TRIGGER_SUSPEND)) {
289			reinit = false;
290			break;
291		}
292		if (val & MT_WF_SW_SER_DONE_SUSPEND) {
293			mt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);
294			break;
295		}
296
297		msleep(20);
298	}
299
300	if (reinit || mt792x_dma_need_reinit(dev)) {
301		err = mt792xu_dma_init(dev, true);
302		if (err)
303			goto failed;
304	}
305
306	err = mt76u_resume_rx(&dev->mt76);
307	if (err < 0)
308		goto failed;
309
310	mt76_connac_mcu_set_hif_suspend(&dev->mt76, false, false);
311	ret = wait_event_timeout(dev->wait,
312				 dev->hif_resumed, 3 * HZ);
313	if (!ret)
314		err = -ETIMEDOUT;
315failed:
316	pm->suspended = false;
317
318	if (err < 0)
319		mt792x_reset(&dev->mt76);
320
321	return err;
322}
323#endif /* CONFIG_PM */
324
325MODULE_DEVICE_TABLE(usb, mt7925u_device_table);
326MODULE_FIRMWARE(MT7925_FIRMWARE_WM);
327MODULE_FIRMWARE(MT7925_ROM_PATCH);
328
329static struct usb_driver mt7925u_driver = {
330	.name		= KBUILD_MODNAME,
331	.id_table	= mt7925u_device_table,
332	.probe		= mt7925u_probe,
333	.disconnect	= mt792xu_disconnect,
334#ifdef CONFIG_PM
335	.suspend	= mt7925u_suspend,
336	.resume		= mt7925u_resume,
337	.reset_resume	= mt7925u_resume,
338#endif /* CONFIG_PM */
339	.soft_unbind	= 1,
340	.disable_hub_initiated_lpm = 1,
341};
342module_usb_driver(mt7925u_driver);
343
344MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
345MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver");
346MODULE_LICENSE("Dual BSD/GPL");