usb.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
  4 */
  5
  6#include <linux/kernel.h>
  7#include <linux/module.h>
  8#include <linux/usb.h>
  9
 10#include "mt76x0.h"
 11#include "mcu.h"
 12#include "../mt76x02_usb.h"
 13
 14static struct usb_device_id mt76x0_device_table[] = {
 15	{ USB_DEVICE(0x148F, 0x7610) },	/* MT7610U */
 16	{ USB_DEVICE(0x13B1, 0x003E) },	/* Linksys AE6000 */
 17	{ USB_DEVICE(0x0E8D, 0x7610) },	/* Sabrent NTWLAC */
 18	{ USB_DEVICE(0x7392, 0xa711) },	/* Edimax 7711mac */
 19	{ USB_DEVICE(0x7392, 0xb711) },	/* Edimax / Elecom  */
 20	{ USB_DEVICE(0x148f, 0x761a) },	/* TP-Link TL-WDN5200 */
 21	{ USB_DEVICE(0x148f, 0x760a) },	/* TP-Link unknown */
 22	{ USB_DEVICE(0x0b05, 0x17d1) },	/* Asus USB-AC51 */
 23	{ USB_DEVICE(0x0b05, 0x17db) },	/* Asus USB-AC50 */
 24	{ USB_DEVICE(0x0df6, 0x0075) },	/* Sitecom WLA-3100 */
 25	{ USB_DEVICE(0x2019, 0xab31) },	/* Planex GW-450D */
 26	{ USB_DEVICE(0x2001, 0x3d02) },	/* D-LINK DWA-171 rev B1 */
 27	{ USB_DEVICE(0x0586, 0x3425) },	/* Zyxel NWD6505 */
 28	{ USB_DEVICE(0x07b8, 0x7610) },	/* AboCom AU7212 */
 29	{ USB_DEVICE(0x04bb, 0x0951) },	/* I-O DATA WN-AC433UK */
 30	{ USB_DEVICE(0x057c, 0x8502) },	/* AVM FRITZ!WLAN USB Stick AC 430 */
 31	{ USB_DEVICE(0x293c, 0x5702) },	/* Comcast Xfinity KXW02AAA  */
 32	{ USB_DEVICE(0x20f4, 0x806b) },	/* TRENDnet TEW-806UBH  */
 33	{ USB_DEVICE(0x7392, 0xc711) }, /* Devolo Wifi ac Stick */
 34	{ USB_DEVICE(0x0df6, 0x0079) }, /* Sitecom Europe B.V. ac  Stick */
 35	{ USB_DEVICE(0x2357, 0x0123) }, /* TP-LINK T2UHP_US_v1 */
 36	{ USB_DEVICE(0x2357, 0x010b) }, /* TP-LINK T2UHP_UN_v1 */
 37	/* TP-LINK Archer T1U */
 38	{ USB_DEVICE(0x2357, 0x0105), .driver_info = 1, },
 39	/* MT7630U */
 40	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7630, 0xff, 0x2, 0xff)},
 41	/* MT7650U */
 42	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7650, 0xff, 0x2, 0xff)},
 43	{ 0, }
 44};
 45
 46static void mt76x0_init_usb_dma(struct mt76x02_dev *dev)
 47{
 48	u32 val;
 49
 50	val = mt76_rr(dev, MT_USB_DMA_CFG);
 51
 52	val |= MT_USB_DMA_CFG_RX_BULK_EN |
 53	       MT_USB_DMA_CFG_TX_BULK_EN;
 54
 55	/* disable AGGR_BULK_RX in order to receive one
 56	 * frame in each rx urb and avoid copies
 57	 */
 58	val &= ~MT_USB_DMA_CFG_RX_BULK_AGG_EN;
 59	mt76_wr(dev, MT_USB_DMA_CFG, val);
 60
 61	val = mt76_rr(dev, MT_COM_REG0);
 62	if (val & 1)
 63		dev_dbg(dev->mt76.dev, "MCU not ready\n");
 64
 65	val = mt76_rr(dev, MT_USB_DMA_CFG);
 66
 67	val |= MT_USB_DMA_CFG_RX_DROP_OR_PAD;
 68	mt76_wr(dev, MT_USB_DMA_CFG, val);
 69	val &= ~MT_USB_DMA_CFG_RX_DROP_OR_PAD;
 70	mt76_wr(dev, MT_USB_DMA_CFG, val);
 71}
 72
 73static void mt76x0u_cleanup(struct mt76x02_dev *dev)
 74{
 75	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
 76	mt76x0_chip_onoff(dev, false, false);
 77	mt76u_queues_deinit(&dev->mt76);
 78}
 79
 80static void mt76x0u_stop(struct ieee80211_hw *hw, bool suspend)
 81{
 82	struct mt76x02_dev *dev = hw->priv;
 83
 84	clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
 85	cancel_delayed_work_sync(&dev->cal_work);
 86	cancel_delayed_work_sync(&dev->mphy.mac_work);
 87	mt76u_stop_tx(&dev->mt76);
 88	mt76x02u_exit_beacon_config(dev);
 89
 90	if (test_bit(MT76_REMOVED, &dev->mphy.state))
 91		return;
 92
 93	if (!mt76_poll(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_TX_BUSY, 0, 1000))
 94		dev_warn(dev->mt76.dev, "TX DMA did not stop\n");
 95
 96	mt76x0_mac_stop(dev);
 97
 98	if (!mt76_poll(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_RX_BUSY, 0, 1000))
 99		dev_warn(dev->mt76.dev, "RX DMA did not stop\n");
100}
101
102static int mt76x0u_start(struct ieee80211_hw *hw)
103{
104	struct mt76x02_dev *dev = hw->priv;
105	int ret;
106
107	ret = mt76x02u_mac_start(dev);
108	if (ret)
109		return ret;
110
111	mt76x0_phy_calibrate(dev, true);
112	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mphy.mac_work,
113				     MT_MAC_WORK_INTERVAL);
114	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
115				     MT_CALIBRATE_INTERVAL);
116	set_bit(MT76_STATE_RUNNING, &dev->mphy.state);
117	return 0;
118}
119
120static const struct ieee80211_ops mt76x0u_ops = {
121	.add_chanctx = ieee80211_emulate_add_chanctx,
122	.remove_chanctx = ieee80211_emulate_remove_chanctx,
123	.change_chanctx = ieee80211_emulate_change_chanctx,
124	.switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
125	.tx = mt76x02_tx,
126	.start = mt76x0u_start,
127	.stop = mt76x0u_stop,
128	.add_interface = mt76x02_add_interface,
129	.remove_interface = mt76x02_remove_interface,
130	.config = mt76x0_config,
131	.configure_filter = mt76x02_configure_filter,
132	.bss_info_changed = mt76x02_bss_info_changed,
133	.sta_state = mt76_sta_state,
134	.sta_pre_rcu_remove = mt76_sta_pre_rcu_remove,
135	.set_key = mt76x02_set_key,
136	.conf_tx = mt76x02_conf_tx,
137	.sw_scan_start = mt76_sw_scan,
138	.sw_scan_complete = mt76x02_sw_scan_complete,
139	.ampdu_action = mt76x02_ampdu_action,
140	.sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,
141	.set_rts_threshold = mt76x02_set_rts_threshold,
142	.wake_tx_queue = mt76_wake_tx_queue,
143	.get_txpower = mt76_get_txpower,
144	.get_survey = mt76_get_survey,
145	.set_tim = mt76_set_tim,
146	.release_buffered_frames = mt76_release_buffered_frames,
147	.get_antenna = mt76_get_antenna,
148	.set_sar_specs = mt76x0_set_sar_specs,
149};
150
151static int mt76x0u_init_hardware(struct mt76x02_dev *dev, bool reset)
152{
153	int err;
154
155	mt76x0_chip_onoff(dev, true, reset);
156
157	if (!mt76x02_wait_for_mac(&dev->mt76))
158		return -ETIMEDOUT;
159
160	err = mt76x0u_mcu_init(dev);
161	if (err < 0)
162		return err;
163
164	mt76x0_init_usb_dma(dev);
165	err = mt76x0_init_hardware(dev);
166	if (err < 0)
167		return err;
168
169	mt76x02u_init_beacon_config(dev);
170
171	mt76_rmw(dev, MT_US_CYC_CFG, MT_US_CYC_CNT, 0x1e);
172	mt76_wr(dev, MT_TXOP_CTRL_CFG,
173		FIELD_PREP(MT_TXOP_TRUN_EN, 0x3f) |
174		FIELD_PREP(MT_TXOP_EXT_CCA_DLY, 0x58));
175
176	return 0;
177}
178
179static int mt76x0u_register_device(struct mt76x02_dev *dev)
180{
181	struct ieee80211_hw *hw = dev->mt76.hw;
182	struct mt76_usb *usb = &dev->mt76.usb;
183	int err;
184
185	usb->mcu.data = devm_kmalloc(dev->mt76.dev, MCU_RESP_URB_SIZE,
186				     GFP_KERNEL);
187	if (!usb->mcu.data)
188		return -ENOMEM;
189
190	err = mt76u_alloc_queues(&dev->mt76);
191	if (err < 0)
192		goto out_err;
193
194	err = mt76x0u_init_hardware(dev, true);
195	if (err < 0)
196		goto out_err;
197
198	/* check hw sg support in order to enable AMSDU */
199	hw->max_tx_fragments = dev->mt76.usb.sg_en ? MT_TX_SG_MAX_SIZE : 1;
200	err = mt76x0_register_device(dev);
201	if (err < 0)
202		goto out_err;
203
204	set_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
205
206	return 0;
207
208out_err:
209	mt76x0u_cleanup(dev);
210	return err;
211}
212
213static int mt76x0u_probe(struct usb_interface *usb_intf,
214			 const struct usb_device_id *id)
215{
216	static const struct mt76_driver_ops drv_ops = {
217		.drv_flags = MT_DRV_SW_RX_AIRTIME |
218			     MT_DRV_IGNORE_TXS_FAILED,
219		.survey_flags = SURVEY_INFO_TIME_TX,
220		.update_survey = mt76x02_update_channel,
221		.set_channel = mt76x0_set_channel,
222		.tx_prepare_skb = mt76x02u_tx_prepare_skb,
223		.tx_complete_skb = mt76x02u_tx_complete_skb,
224		.tx_status_data = mt76x02_tx_status_data,
225		.rx_skb = mt76x02_queue_rx_skb,
226		.sta_ps = mt76x02_sta_ps,
227		.sta_add = mt76x02_sta_add,
228		.sta_remove = mt76x02_sta_remove,
229	};
230	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
231	struct mt76x02_dev *dev;
232	struct mt76_dev *mdev;
233	u32 mac_rev;
234	int ret;
235
236	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), &mt76x0u_ops,
237				 &drv_ops);
238	if (!mdev)
239		return -ENOMEM;
240
241	dev = container_of(mdev, struct mt76x02_dev, mt76);
242	mutex_init(&dev->phy_mutex);
243
244	/* Quirk for Archer T1U */
245	if (id->driver_info)
246		dev->no_2ghz = true;
247
248	usb_dev = usb_get_dev(usb_dev);
249	usb_reset_device(usb_dev);
250
251	usb_set_intfdata(usb_intf, dev);
252
253	mt76x02u_init_mcu(mdev);
254	ret = mt76u_init(mdev, usb_intf);
255	if (ret)
256		goto err;
257
258	/* Disable the HW, otherwise MCU fail to initialize on hot reboot */
259	mt76x0_chip_onoff(dev, false, false);
260
261	if (!mt76x02_wait_for_mac(mdev)) {
262		ret = -ETIMEDOUT;
263		goto err;
264	}
265
266	mdev->rev = mt76_rr(dev, MT_ASIC_VERSION);
267	mac_rev = mt76_rr(dev, MT_MAC_CSR0);
268	dev_info(mdev->dev, "ASIC revision: %08x MAC revision: %08x\n",
269		 mdev->rev, mac_rev);
270	if (!is_mt76x0(dev)) {
271		ret = -ENODEV;
272		goto err;
273	}
274
275	/* Note: vendor driver skips this check for MT76X0U */
276	if (!(mt76_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
277		dev_warn(mdev->dev, "Warning: eFUSE not present\n");
278
279	ret = mt76x0u_register_device(dev);
280	if (ret < 0)
281		goto err;
282
283	return 0;
284
285err:
286	usb_set_intfdata(usb_intf, NULL);
287	usb_put_dev(interface_to_usbdev(usb_intf));
288	mt76u_queues_deinit(&dev->mt76);
289	mt76_free_device(&dev->mt76);
290
291	return ret;
292}
293
294static void mt76x0_disconnect(struct usb_interface *usb_intf)
295{
296	struct mt76x02_dev *dev = usb_get_intfdata(usb_intf);
297	bool initialized = test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
298
299	if (!initialized)
300		return;
301
302	ieee80211_unregister_hw(dev->mt76.hw);
303	mt76x0u_cleanup(dev);
304
305	usb_set_intfdata(usb_intf, NULL);
306	usb_put_dev(interface_to_usbdev(usb_intf));
307
308	mt76_free_device(&dev->mt76);
309}
310
311static int __maybe_unused mt76x0_suspend(struct usb_interface *usb_intf,
312					 pm_message_t state)
313{
314	struct mt76x02_dev *dev = usb_get_intfdata(usb_intf);
315
316	mt76u_stop_rx(&dev->mt76);
317	clear_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
318	mt76x0_chip_onoff(dev, false, false);
319
320	return 0;
321}
322
323static int __maybe_unused mt76x0_resume(struct usb_interface *usb_intf)
324{
325	struct mt76x02_dev *dev = usb_get_intfdata(usb_intf);
326	int ret;
327
328	ret = mt76u_resume_rx(&dev->mt76);
329	if (ret < 0)
330		goto err;
331
332	ret = mt76x0u_init_hardware(dev, false);
333	if (ret)
334		goto err;
335
336	return 0;
337err:
338	mt76x0u_cleanup(dev);
339	return ret;
340}
341
342MODULE_DEVICE_TABLE(usb, mt76x0_device_table);
343MODULE_FIRMWARE(MT7610E_FIRMWARE);
344MODULE_FIRMWARE(MT7610U_FIRMWARE);
345MODULE_DESCRIPTION("MediaTek MT76x0U (USB) wireless driver");
346MODULE_LICENSE("GPL");
347
348static struct usb_driver mt76x0_driver = {
349	.name		= KBUILD_MODNAME,
350	.id_table	= mt76x0_device_table,
351	.probe		= mt76x0u_probe,
352	.disconnect	= mt76x0_disconnect,
353	.suspend	= mt76x0_suspend,
354	.resume		= mt76x0_resume,
355	.reset_resume	= mt76x0_resume,
356	.soft_unbind	= 1,
357	.disable_hub_initiated_lpm = 1,
358};
359module_usb_driver(mt76x0_driver);