summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/mediatek/mt7601u/main.c
blob: 3c9ea40d9584e63e43fc7e95286021bdbcdb3447 (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
/*
 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#include "mt7601u.h"
#include "mac.h"
#include <linux/etherdevice.h>

static int mt7601u_start(struct ieee80211_hw *hw)
{
	struct mt7601u_dev *dev = hw->priv;
	int ret;

	mutex_lock(&dev->mutex);

	ret = mt7601u_mac_start(dev);
	if (ret)
		goto out;

	ieee80211_queue_delayed_work(dev->hw, &dev->mac_work,
				     MT_CALIBRATE_INTERVAL);
	ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
				     MT_CALIBRATE_INTERVAL);
out:
	mutex_unlock(&dev->mutex);
	return ret;
}

static void mt7601u_stop(struct ieee80211_hw *hw)
{
	struct mt7601u_dev *dev = hw->priv;

	mutex_lock(&dev->mutex);

	cancel_delayed_work_sync(&dev->cal_work);
	cancel_delayed_work_sync(&dev->mac_work);
	mt7601u_mac_stop(dev);

	mutex_unlock(&dev->mutex);
}

static int mt7601u_add_interface(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
	unsigned int idx = 0;
	unsigned int wcid = GROUP_WCID(idx);

	/* Note: for AP do the AP-STA things mt76 does:
	 *	- beacon offsets
	 *	- do mac address tricks
	 *	- shift vif idx
	 */
	mvif->idx = idx;

	if (!ether_addr_equal(dev->macaddr, vif->addr))
		mt7601u_set_macaddr(dev, vif->addr);

	if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
		return -ENOSPC;
	dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
	mvif->group_wcid.idx = wcid;
	mvif->group_wcid.hw_key_idx = -1;

	return 0;
}

static void mt7601u_remove_interface(struct ieee80211_hw *hw,
				     struct ieee80211_vif *vif)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
	unsigned int wcid = mvif->group_wcid.idx;

	dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
}

static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
{
	struct mt7601u_dev *dev = hw->priv;
	int ret = 0;

	mutex_lock(&dev->mutex);

	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
		ieee80211_stop_queues(hw);
		ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
		ieee80211_wake_queues(hw);
	}

	mutex_unlock(&dev->mutex);

	return ret;
}

static void
mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
		      unsigned int *total_flags, u64 multicast)
{
	struct mt7601u_dev *dev = hw->priv;
	u32 flags = 0;

#define MT76_FILTER(_flag, _hw) do { \
		flags |= *total_flags & FIF_##_flag;			\
		dev->rxfilter &= ~(_hw);				\
		dev->rxfilter |= !(flags & FIF_##_flag) * (_hw);	\
	} while (0)

	mutex_lock(&dev->mutex);

	dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;

	MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
	MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
	MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
	MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
			     MT_RX_FILTR_CFG_CTS |
			     MT_RX_FILTR_CFG_CFEND |
			     MT_RX_FILTR_CFG_CFACK |
			     MT_RX_FILTR_CFG_BA |
			     MT_RX_FILTR_CFG_CTRL_RSV);
	MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);

	*total_flags = flags;
	mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);

	mutex_unlock(&dev->mutex);
}

static void
mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			 struct ieee80211_bss_conf *info, u32 changed)
{
	struct mt7601u_dev *dev = hw->priv;

	mutex_lock(&dev->mutex);

	if (changed & BSS_CHANGED_ASSOC)
		mt7601u_phy_con_cal_onoff(dev, info);

	if (changed & BSS_CHANGED_BSSID) {
		mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);

		/* Note: this is a hack because beacon_int is not changed
		 *	 on leave nor is any more appropriate event generated.
		 *	 rt2x00 doesn't seem to be bothered though.
		 */
		if (is_zero_ether_addr(info->bssid))
			mt7601u_mac_config_tsf(dev, false, 0);
	}

	if (changed & BSS_CHANGED_BASIC_RATES) {
		mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
		mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
		mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
		mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
		mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
	}

	if (changed & BSS_CHANGED_BEACON_INT)
		mt7601u_mac_config_tsf(dev, true, info->beacon_int);

	if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
		mt7601u_mac_set_protection(dev, info->use_cts_prot,
					   info->ht_operation_mode);

	if (changed & BSS_CHANGED_ERP_PREAMBLE)
		mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);

	if (changed & BSS_CHANGED_ERP_SLOT) {
		int slottime = info->use_short_slot ? 9 : 20;

		mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
			       MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
	}

	if (changed & BSS_CHANGED_ASSOC)
		mt7601u_phy_recalibrate_after_assoc(dev);

	mutex_unlock(&dev->mutex);
}

static int
mt76_wcid_alloc(struct mt7601u_dev *dev)
{
	int i, idx = 0;

	for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
		idx = ffs(~dev->wcid_mask[i]);
		if (!idx)
			continue;

		idx--;
		dev->wcid_mask[i] |= BIT(idx);
		break;
	}

	idx = i * BITS_PER_LONG + idx;
	if (idx > 119)
		return -1;

	return idx;
}

static int
mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		struct ieee80211_sta *sta)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
	int ret = 0;
	int idx = 0;

	mutex_lock(&dev->mutex);

	idx = mt76_wcid_alloc(dev);
	if (idx < 0) {
		ret = -ENOSPC;
		goto out;
	}

	msta->wcid.idx = idx;
	msta->wcid.hw_key_idx = -1;
	mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
	mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
	rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
	mt7601u_mac_set_ampdu_factor(dev);

out:
	mutex_unlock(&dev->mutex);

	return ret;
}

static int
mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		   struct ieee80211_sta *sta)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
	int idx = msta->wcid.idx;

	mutex_lock(&dev->mutex);
	rcu_assign_pointer(dev->wcid[idx], NULL);
	mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
	dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
	mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
	mt7601u_mac_set_ampdu_factor(dev);
	mutex_unlock(&dev->mutex);

	return 0;
}

static void
mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		   enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
{
}

static void
mt7601u_sw_scan(struct ieee80211_hw *hw,
		struct ieee80211_vif *vif,
		const u8 *mac_addr)
{
	struct mt7601u_dev *dev = hw->priv;

	mt7601u_agc_save(dev);
	set_bit(MT7601U_STATE_SCANNING, &dev->state);
}

static void
mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
			 struct ieee80211_vif *vif)
{
	struct mt7601u_dev *dev = hw->priv;

	mt7601u_agc_restore(dev);
	clear_bit(MT7601U_STATE_SCANNING, &dev->state);
}

static int
mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
		struct ieee80211_vif *vif, struct ieee80211_sta *sta,
		struct ieee80211_key_conf *key)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
	struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
	struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
	int idx = key->keyidx;
	int ret;

	if (cmd == SET_KEY) {
		key->hw_key_idx = wcid->idx;
		wcid->hw_key_idx = idx;
	} else {
		if (idx == wcid->hw_key_idx)
			wcid->hw_key_idx = -1;

		key = NULL;
	}

	if (!msta) {
		if (key || wcid->hw_key_idx == idx) {
			ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
			if (ret)
				return ret;
		}

		return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
	}

	return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
}

static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
	struct mt7601u_dev *dev = hw->priv;

	mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);

	return 0;
}

static int
mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		  struct ieee80211_ampdu_params *params)
{
	struct mt7601u_dev *dev = hw->priv;
	struct ieee80211_sta *sta = params->sta;
	enum ieee80211_ampdu_mlme_action action = params->action;
	u16 tid = params->tid;
	u16 *ssn = &params->ssn;
	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;

	WARN_ON(msta->wcid.idx > GROUP_WCID(0));

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
		break;
	case IEEE80211_AMPDU_RX_STOP:
		mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
			   BIT(16 + tid));
		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
		break;
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
		break;
	case IEEE80211_AMPDU_TX_START:
		msta->agg_ssn[tid] = *ssn << 4;
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;
	}

	return 0;
}

static void
mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			 struct ieee80211_sta *sta)
{
	struct mt7601u_dev *dev = hw->priv;
	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
	struct ieee80211_sta_rates *rates;
	struct ieee80211_tx_rate rate = {};

	rcu_read_lock();
	rates = rcu_dereference(sta->rates);

	if (!rates)
		goto out;

	rate.idx = rates->rate[0].idx;
	rate.flags = rates->rate[0].flags;
	mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);

out:
	rcu_read_unlock();
}

const struct ieee80211_ops mt7601u_ops = {
	.tx = mt7601u_tx,
	.start = mt7601u_start,
	.stop = mt7601u_stop,
	.add_interface = mt7601u_add_interface,
	.remove_interface = mt7601u_remove_interface,
	.config = mt7601u_config,
	.configure_filter = mt76_configure_filter,
	.bss_info_changed = mt7601u_bss_info_changed,
	.sta_add = mt7601u_sta_add,
	.sta_remove = mt7601u_sta_remove,
	.sta_notify = mt7601u_sta_notify,
	.set_key = mt7601u_set_key,
	.conf_tx = mt7601u_conf_tx,
	.sw_scan_start = mt7601u_sw_scan,
	.sw_scan_complete = mt7601u_sw_scan_complete,
	.ampdu_action = mt76_ampdu_action,
	.sta_rate_tbl_update = mt76_sta_rate_tbl_update,
	.set_rts_threshold = mt7601u_set_rts_threshold,
};