summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
blob: 5be6704770ad0ca313208f720595ad6d79d83a43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
// SPDX-License-Identifier: ISC
/* Copyright (C) 2019 MediaTek Inc.
 *
 * Author: Felix Fietkau <nbd@nbd.name>
 *	   Lorenzo Bianconi <lorenzo@kernel.org>
 *	   Sean Wang <sean.wang@mediatek.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "mt7615.h"
#include "mac.h"
#include "mcu.h"
#include "regs.h"

static const u32 mt7663u_reg_map[] = {
	[MT_TOP_CFG_BASE]	= 0x80020000,
	[MT_HW_BASE]		= 0x80000000,
	[MT_DMA_SHDL_BASE]	= 0x5000a000,
	[MT_HIF_BASE]		= 0x50000000,
	[MT_CSR_BASE]		= 0x40000000,
	[MT_EFUSE_ADDR_BASE]	= 0x78011000,
	[MT_TOP_MISC_BASE]	= 0x81020000,
	[MT_PLE_BASE]		= 0x82060000,
	[MT_PSE_BASE]		= 0x82068000,
	[MT_PHY_BASE]		= 0x82070000,
	[MT_WTBL_BASE_ADDR]	= 0x820e0000,
	[MT_CFG_BASE]		= 0x820f0000,
	[MT_AGG_BASE]		= 0x820f2000,
	[MT_ARB_BASE]		= 0x820f3000,
	[MT_TMAC_BASE]		= 0x820f4000,
	[MT_RMAC_BASE]		= 0x820f5000,
	[MT_DMA_BASE]		= 0x820f7000,
	[MT_PF_BASE]		= 0x820f8000,
	[MT_WTBL_BASE_ON]	= 0x820f9000,
	[MT_WTBL_BASE_OFF]	= 0x820f9800,
	[MT_LPON_BASE]		= 0x820fb000,
	[MT_MIB_BASE]		= 0x820fd000,
};

static const struct usb_device_id mt7615_device_table[] = {
	{ USB_DEVICE_AND_INTERFACE_INFO(0x0e8d, 0x7663, 0xff, 0xff, 0xff) },
	{ },
};

static void mt7663u_stop(struct ieee80211_hw *hw)
{
	struct mt7615_phy *phy = mt7615_hw_phy(hw);
	struct mt7615_dev *dev = hw->priv;

	clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
	del_timer_sync(&phy->roc_timer);
	cancel_work_sync(&phy->roc_work);
	cancel_delayed_work_sync(&phy->scan_work);
	cancel_delayed_work_sync(&phy->mac_work);
	mt76u_stop_tx(&dev->mt76);
}

static void mt7663u_cleanup(struct mt7615_dev *dev)
{
	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
	mt76u_queues_deinit(&dev->mt76);
}

static void
mt7663u_mac_write_txwi(struct mt7615_dev *dev, struct mt76_wcid *wcid,
		       enum mt76_txq_id qid, struct ieee80211_sta *sta,
		       struct sk_buff *skb)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_key_conf *key = info->control.hw_key;
	__le32 *txwi;
	int pid;

	if (!wcid)
		wcid = &dev->mt76.global_wcid;

	pid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);

	txwi = (__le32 *)(skb->data - MT_USB_TXD_SIZE);
	memset(txwi, 0, MT_USB_TXD_SIZE);
	mt7615_mac_write_txwi(dev, txwi, skb, wcid, sta, pid, key, false);
	skb_push(skb, MT_USB_TXD_SIZE);
}

static int
__mt7663u_mac_set_rates(struct mt7615_dev *dev,
			struct mt7615_wtbl_desc *wd)
{
	struct mt7615_rate_desc *rate = &wd->rate;
	struct mt7615_sta *sta = wd->sta;
	u32 w5, w27, addr, val;

	lockdep_assert_held(&dev->mt76.mutex);

	if (!sta)
		return -EINVAL;

	if (!mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000))
		return -ETIMEDOUT;

	addr = mt7615_mac_wtbl_addr(dev, sta->wcid.idx);

	w27 = mt76_rr(dev, addr + 27 * 4);
	w27 &= ~MT_WTBL_W27_CC_BW_SEL;
	w27 |= FIELD_PREP(MT_WTBL_W27_CC_BW_SEL, rate->bw);

	w5 = mt76_rr(dev, addr + 5 * 4);
	w5 &= ~(MT_WTBL_W5_BW_CAP | MT_WTBL_W5_CHANGE_BW_RATE |
		MT_WTBL_W5_MPDU_OK_COUNT |
		MT_WTBL_W5_MPDU_FAIL_COUNT |
		MT_WTBL_W5_RATE_IDX);
	w5 |= FIELD_PREP(MT_WTBL_W5_BW_CAP, rate->bw) |
	      FIELD_PREP(MT_WTBL_W5_CHANGE_BW_RATE,
			 rate->bw_idx ? rate->bw_idx - 1 : 7);

	mt76_wr(dev, MT_WTBL_RIUCR0, w5);

	mt76_wr(dev, MT_WTBL_RIUCR1,
		FIELD_PREP(MT_WTBL_RIUCR1_RATE0, rate->probe_val) |
		FIELD_PREP(MT_WTBL_RIUCR1_RATE1, rate->val[0]) |
		FIELD_PREP(MT_WTBL_RIUCR1_RATE2_LO, rate->val[1]));

	mt76_wr(dev, MT_WTBL_RIUCR2,
		FIELD_PREP(MT_WTBL_RIUCR2_RATE2_HI, rate->val[1] >> 8) |
		FIELD_PREP(MT_WTBL_RIUCR2_RATE3, rate->val[1]) |
		FIELD_PREP(MT_WTBL_RIUCR2_RATE4, rate->val[2]) |
		FIELD_PREP(MT_WTBL_RIUCR2_RATE5_LO, rate->val[2]));

	mt76_wr(dev, MT_WTBL_RIUCR3,
		FIELD_PREP(MT_WTBL_RIUCR3_RATE5_HI, rate->val[2] >> 4) |
		FIELD_PREP(MT_WTBL_RIUCR3_RATE6, rate->val[3]) |
		FIELD_PREP(MT_WTBL_RIUCR3_RATE7, rate->val[3]));

	mt76_wr(dev, MT_WTBL_UPDATE,
		FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, sta->wcid.idx) |
		MT_WTBL_UPDATE_RATE_UPDATE |
		MT_WTBL_UPDATE_TX_COUNT_CLEAR);

	mt76_wr(dev, addr + 27 * 4, w27);

	mt76_set(dev, MT_LPON_T0CR, MT_LPON_T0CR_MODE); /* TSF read */
	val = mt76_rr(dev, MT_LPON_UTTR0);
	sta->rate_set_tsf = (val & ~BIT(0)) | rate->rateset;

	if (!(sta->wcid.tx_info & MT_WCID_TX_INFO_SET))
		mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);

	sta->rate_count = 2 * MT7615_RATE_RETRY * sta->n_rates;
	sta->wcid.tx_info |= MT_WCID_TX_INFO_SET;

	return 0;
}

static int
__mt7663u_mac_set_key(struct mt7615_dev *dev,
		      struct mt7615_wtbl_desc *wd)
{
	struct mt7615_key_desc *key = &wd->key;
	struct mt7615_sta *sta = wd->sta;
	enum mt7615_cipher_type cipher;
	struct mt76_wcid *wcid;
	int err;

	lockdep_assert_held(&dev->mt76.mutex);

	if (!sta)
		return -EINVAL;

	cipher = mt7615_mac_get_cipher(key->cipher);
	if (cipher == MT_CIPHER_NONE)
		return -EOPNOTSUPP;

	wcid = &wd->sta->wcid;

	mt7615_mac_wtbl_update_cipher(dev, wcid, cipher, key->cmd);
	err = mt7615_mac_wtbl_update_key(dev, wcid, key->key, key->keylen,
					 cipher, key->cmd);
	if (err < 0)
		return err;

	err = mt7615_mac_wtbl_update_pk(dev, wcid, cipher, key->keyidx,
					key->cmd);
	if (err < 0)
		return err;

	if (key->cmd == SET_KEY)
		wcid->cipher |= BIT(cipher);
	else
		wcid->cipher &= ~BIT(cipher);

	return 0;
}

void mt7663u_wtbl_work(struct work_struct *work)
{
	struct mt7615_wtbl_desc *wd, *wd_next;
	struct mt7615_dev *dev;

	dev = (struct mt7615_dev *)container_of(work, struct mt7615_dev,
						wtbl_work);

	list_for_each_entry_safe(wd, wd_next, &dev->wd_head, node) {
		spin_lock_bh(&dev->mt76.lock);
		list_del(&wd->node);
		spin_unlock_bh(&dev->mt76.lock);

		mutex_lock(&dev->mt76.mutex);
		switch (wd->type) {
		case MT7615_WTBL_RATE_DESC:
			__mt7663u_mac_set_rates(dev, wd);
			break;
		case MT7615_WTBL_KEY_DESC:
			__mt7663u_mac_set_key(dev, wd);
			break;
		}
		mutex_unlock(&dev->mt76.mutex);

		kfree(wd);
	}
}

static void
mt7663u_tx_complete_skb(struct mt76_dev *mdev, enum mt76_txq_id qid,
			struct mt76_queue_entry *e)
{
	skb_pull(e->skb, MT_USB_HDR_SIZE + MT_USB_TXD_SIZE);
	mt76_tx_complete_skb(mdev, e->skb);
}

static int
mt7663u_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
		       enum mt76_txq_id qid, struct mt76_wcid *wcid,
		       struct ieee80211_sta *sta,
		       struct mt76_tx_info *tx_info)
{
	struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);

	if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) {
		struct mt7615_sta *msta;

		msta = container_of(wcid, struct mt7615_sta, wcid);
		spin_lock_bh(&dev->mt76.lock);
		mt7615_mac_set_rates(&dev->phy, msta, &info->control.rates[0],
				     msta->rates);
		msta->rate_probe = true;
		spin_unlock_bh(&dev->mt76.lock);
	}
	mt7663u_mac_write_txwi(dev, wcid, qid, sta, tx_info->skb);

	return mt76u_skb_dma_info(tx_info->skb, tx_info->skb->len);
}

static bool mt7663u_tx_status_data(struct mt76_dev *mdev, u8 *update)
{
	struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);

	mutex_lock(&dev->mt76.mutex);
	mt7615_mac_sta_poll(dev);
	mutex_unlock(&dev->mt76.mutex);

	return 0;
}

static int mt7663u_probe(struct usb_interface *usb_intf,
			 const struct usb_device_id *id)
{
	static const struct mt76_driver_ops drv_ops = {
		.txwi_size = MT_USB_TXD_SIZE,
		.drv_flags = MT_DRV_RX_DMA_HDR | MT_DRV_HW_MGMT_TXQ,
		.tx_prepare_skb = mt7663u_tx_prepare_skb,
		.tx_complete_skb = mt7663u_tx_complete_skb,
		.tx_status_data = mt7663u_tx_status_data,
		.rx_skb = mt7615_queue_rx_skb,
		.sta_ps = mt7615_sta_ps,
		.sta_add = mt7615_mac_sta_add,
		.sta_remove = mt7615_mac_sta_remove,
		.update_survey = mt7615_update_channel,
	};
	struct usb_device *udev = interface_to_usbdev(usb_intf);
	struct ieee80211_ops *ops;
	struct mt7615_dev *dev;
	struct mt76_dev *mdev;
	int ret;

	ops = devm_kmemdup(&usb_intf->dev, &mt7615_ops, sizeof(mt7615_ops),
			   GFP_KERNEL);
	if (!ops)
		return -ENOMEM;

	ops->stop = mt7663u_stop;

	mdev = mt76_alloc_device(&usb_intf->dev, sizeof(*dev), ops, &drv_ops);
	if (!mdev)
		return -ENOMEM;

	dev = container_of(mdev, struct mt7615_dev, mt76);
	udev = usb_get_dev(udev);
	usb_reset_device(udev);

	usb_set_intfdata(usb_intf, dev);

	dev->reg_map = mt7663u_reg_map;
	dev->ops = ops;
	ret = mt76u_init(mdev, usb_intf, true);
	if (ret < 0)
		goto error;

	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
		    (mt76_rr(dev, MT_HW_REV) & 0xff);
	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);

	if (mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
			   FW_STATE_PWR_ON << 1, 500)) {
		dev_dbg(dev->mt76.dev, "Usb device already powered on\n");
		set_bit(MT76_STATE_POWER_OFF, &dev->mphy.state);
		goto alloc_queues;
	}

	ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
				   USB_DIR_OUT | USB_TYPE_VENDOR,
				   0x0, 0x1, NULL, 0);
	if (ret)
		goto error;

	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
			    FW_STATE_PWR_ON << 1, 500)) {
		dev_err(dev->mt76.dev, "Timeout for power on\n");
		ret = -EIO;
		goto error;
	}

alloc_queues:
	ret = mt76u_alloc_mcu_queue(&dev->mt76);
	if (ret)
		goto error_free_q;

	ret = mt76u_alloc_queues(&dev->mt76);
	if (ret)
		goto error_free_q;

	ret = mt7663u_register_device(dev);
	if (ret)
		goto error_free_q;

	return 0;

error_free_q:
	mt76u_queues_deinit(&dev->mt76);
error:
	mt76u_deinit(&dev->mt76);
	usb_set_intfdata(usb_intf, NULL);
	usb_put_dev(interface_to_usbdev(usb_intf));

	ieee80211_free_hw(mdev->hw);

	return ret;
}

static void mt7663u_disconnect(struct usb_interface *usb_intf)
{
	struct mt7615_dev *dev = usb_get_intfdata(usb_intf);

	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
		return;

	ieee80211_unregister_hw(dev->mt76.hw);
	mt7663u_cleanup(dev);

	usb_set_intfdata(usb_intf, NULL);
	usb_put_dev(interface_to_usbdev(usb_intf));

	mt76u_deinit(&dev->mt76);
	ieee80211_free_hw(dev->mt76.hw);
}

#ifdef CONFIG_PM
static int mt7663u_suspend(struct usb_interface *intf, pm_message_t state)
{
	struct mt7615_dev *dev = usb_get_intfdata(intf);

	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
	    mt7615_firmware_offload(dev)) {
		int err;

		err = mt7615_mcu_set_hif_suspend(dev, true);
		if (err < 0)
			return err;
	}

	mt76u_stop_rx(&dev->mt76);

	mt76u_stop_tx(&dev->mt76);
	tasklet_kill(&dev->mt76.tx_tasklet);

	return 0;
}

static int mt7663u_resume(struct usb_interface *intf)
{
	struct mt7615_dev *dev = usb_get_intfdata(intf);
	int err;

	err = mt76u_vendor_request(&dev->mt76, MT_VEND_FEATURE_SET,
				   USB_DIR_OUT | USB_TYPE_VENDOR,
				   0x5, 0x0, NULL, 0);
	if (err)
		return err;

	err = mt76u_resume_rx(&dev->mt76);
	if (err < 0)
		return err;

	if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
	    mt7615_firmware_offload(dev))
		err = mt7615_mcu_set_hif_suspend(dev, false);

	return err;
}
#endif /* CONFIG_PM */

MODULE_DEVICE_TABLE(usb, mt7615_device_table);
MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
MODULE_FIRMWARE(MT7663_ROM_PATCH);

static struct usb_driver mt7663u_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= mt7615_device_table,
	.probe		= mt7663u_probe,
	.disconnect	= mt7663u_disconnect,
#ifdef CONFIG_PM
	.suspend	= mt7663u_suspend,
	.resume		= mt7663u_resume,
	.reset_resume	= mt7663u_resume,
#endif /* CONFIG_PM */
	.soft_unbind	= 1,
	.disable_hub_initiated_lpm = 1,
};
module_usb_driver(mt7663u_driver);

MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
MODULE_LICENSE("Dual BSD/GPL");