1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
4  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
5  */
6 
7 #include <linux/module.h>
8 #include "mt76x02.h"
9 
10 #define CCK_RATE(_idx, _rate) {					\
11 	.bitrate = _rate,					\
12 	.flags = IEEE80211_RATE_SHORT_PREAMBLE,			\
13 	.hw_value = (MT_PHY_TYPE_CCK << 8) | (_idx),		\
14 	.hw_value_short = (MT_PHY_TYPE_CCK << 8) | (8 + (_idx)),	\
15 }
16 
17 #define OFDM_RATE(_idx, _rate) {				\
18 	.bitrate = _rate,					\
19 	.hw_value = (MT_PHY_TYPE_OFDM << 8) | (_idx),		\
20 	.hw_value_short = (MT_PHY_TYPE_OFDM << 8) | (_idx),	\
21 }
22 
23 struct ieee80211_rate mt76x02_rates[] = {
24 	CCK_RATE(0, 10),
25 	CCK_RATE(1, 20),
26 	CCK_RATE(2, 55),
27 	CCK_RATE(3, 110),
28 	OFDM_RATE(0, 60),
29 	OFDM_RATE(1, 90),
30 	OFDM_RATE(2, 120),
31 	OFDM_RATE(3, 180),
32 	OFDM_RATE(4, 240),
33 	OFDM_RATE(5, 360),
34 	OFDM_RATE(6, 480),
35 	OFDM_RATE(7, 540),
36 };
37 EXPORT_SYMBOL_GPL(mt76x02_rates);
38 
39 static const struct ieee80211_iface_limit mt76x02_if_limits[] = {
40 	{
41 		.max = 1,
42 		.types = BIT(NL80211_IFTYPE_ADHOC)
43 	}, {
44 		.max = 8,
45 		.types = BIT(NL80211_IFTYPE_STATION) |
46 #ifdef CONFIG_MAC80211_MESH
47 			 BIT(NL80211_IFTYPE_MESH_POINT) |
48 #endif
49 			 BIT(NL80211_IFTYPE_P2P_CLIENT) |
50 			 BIT(NL80211_IFTYPE_P2P_GO) |
51 			 BIT(NL80211_IFTYPE_AP)
52 	 },
53 };
54 
55 static const struct ieee80211_iface_limit mt76x02u_if_limits[] = {
56 	{
57 		.max = 1,
58 		.types = BIT(NL80211_IFTYPE_ADHOC)
59 	}, {
60 		.max = 2,
61 		.types = BIT(NL80211_IFTYPE_STATION) |
62 #ifdef CONFIG_MAC80211_MESH
63 			 BIT(NL80211_IFTYPE_MESH_POINT) |
64 #endif
65 			 BIT(NL80211_IFTYPE_P2P_CLIENT) |
66 			 BIT(NL80211_IFTYPE_P2P_GO) |
67 			 BIT(NL80211_IFTYPE_AP)
68 	},
69 };
70 
71 static const struct ieee80211_iface_combination mt76x02_if_comb[] = {
72 	{
73 		.limits = mt76x02_if_limits,
74 		.n_limits = ARRAY_SIZE(mt76x02_if_limits),
75 		.max_interfaces = 8,
76 		.num_different_channels = 1,
77 		.beacon_int_infra_match = true,
78 		.radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
79 				       BIT(NL80211_CHAN_WIDTH_20) |
80 				       BIT(NL80211_CHAN_WIDTH_40) |
81 				       BIT(NL80211_CHAN_WIDTH_80),
82 	}
83 };
84 
85 static const struct ieee80211_iface_combination mt76x02u_if_comb[] = {
86 	{
87 		.limits = mt76x02u_if_limits,
88 		.n_limits = ARRAY_SIZE(mt76x02u_if_limits),
89 		.max_interfaces = 2,
90 		.num_different_channels = 1,
91 		.beacon_int_infra_match = true,
92 	}
93 };
94 
95 static void
96 mt76x02_led_set_config(struct mt76_dev *mdev, u8 delay_on,
97 		       u8 delay_off)
98 {
99 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev,
100 					       mt76);
101 	u32 val;
102 
103 	val = FIELD_PREP(MT_LED_STATUS_DURATION, 0xff) |
104 	      FIELD_PREP(MT_LED_STATUS_OFF, delay_off) |
105 	      FIELD_PREP(MT_LED_STATUS_ON, delay_on);
106 
107 	mt76_wr(dev, MT_LED_S0(mdev->led_pin), val);
108 	mt76_wr(dev, MT_LED_S1(mdev->led_pin), val);
109 
110 	val = MT_LED_CTRL_REPLAY(mdev->led_pin) |
111 	      MT_LED_CTRL_KICK(mdev->led_pin);
112 	if (mdev->led_al)
113 		val |= MT_LED_CTRL_POLARITY(mdev->led_pin);
114 	mt76_wr(dev, MT_LED_CTRL, val);
115 }
116 
117 static int
118 mt76x02_led_set_blink(struct led_classdev *led_cdev,
119 		      unsigned long *delay_on,
120 		      unsigned long *delay_off)
121 {
122 	struct mt76_dev *mdev = container_of(led_cdev, struct mt76_dev,
123 					     led_cdev);
124 	u8 delta_on, delta_off;
125 
126 	delta_off = max_t(u8, *delay_off / 10, 1);
127 	delta_on = max_t(u8, *delay_on / 10, 1);
128 
129 	mt76x02_led_set_config(mdev, delta_on, delta_off);
130 
131 	return 0;
132 }
133 
134 static void
135 mt76x02_led_set_brightness(struct led_classdev *led_cdev,
136 			   enum led_brightness brightness)
137 {
138 	struct mt76_dev *mdev = container_of(led_cdev, struct mt76_dev,
139 					     led_cdev);
140 
141 	if (!brightness)
142 		mt76x02_led_set_config(mdev, 0, 0xff);
143 	else
144 		mt76x02_led_set_config(mdev, 0xff, 0);
145 }
146 
147 void mt76x02_init_device(struct mt76x02_dev *dev)
148 {
149 	struct ieee80211_hw *hw = mt76_hw(dev);
150 	struct wiphy *wiphy = hw->wiphy;
151 
152 	INIT_DELAYED_WORK(&dev->mt76.mac_work, mt76x02_mac_work);
153 
154 	hw->queues = 4;
155 	hw->max_rates = 1;
156 	hw->max_report_rates = 7;
157 	hw->max_rate_tries = 1;
158 	hw->extra_tx_headroom = 2;
159 
160 	if (mt76_is_usb(&dev->mt76)) {
161 		hw->extra_tx_headroom += sizeof(struct mt76x02_txwi) +
162 					 MT_DMA_HDR_LEN;
163 		wiphy->iface_combinations = mt76x02u_if_comb;
164 		wiphy->n_iface_combinations = ARRAY_SIZE(mt76x02u_if_comb);
165 	} else {
166 		INIT_DELAYED_WORK(&dev->wdt_work, mt76x02_wdt_work);
167 
168 		mt76x02_dfs_init_detector(dev);
169 
170 		wiphy->reg_notifier = mt76x02_regd_notifier;
171 		wiphy->iface_combinations = mt76x02_if_comb;
172 		wiphy->n_iface_combinations = ARRAY_SIZE(mt76x02_if_comb);
173 
174 		/* init led callbacks */
175 		if (IS_ENABLED(CONFIG_MT76_LEDS)) {
176 			dev->mt76.led_cdev.brightness_set =
177 					mt76x02_led_set_brightness;
178 			dev->mt76.led_cdev.blink_set = mt76x02_led_set_blink;
179 		}
180 	}
181 
182 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
183 
184 	hw->sta_data_size = sizeof(struct mt76x02_sta);
185 	hw->vif_data_size = sizeof(struct mt76x02_vif);
186 
187 	ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
188 	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
189 	ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
190 
191 	dev->mt76.global_wcid.idx = 255;
192 	dev->mt76.global_wcid.hw_key_idx = -1;
193 	dev->slottime = 9;
194 
195 	if (is_mt76x2(dev)) {
196 		dev->mphy.sband_2g.sband.ht_cap.cap |=
197 				IEEE80211_HT_CAP_LDPC_CODING;
198 		dev->mphy.sband_5g.sband.ht_cap.cap |=
199 				IEEE80211_HT_CAP_LDPC_CODING;
200 		dev->chainmask = 0x202;
201 		dev->mphy.antenna_mask = 3;
202 	} else {
203 		dev->chainmask = 0x101;
204 		dev->mphy.antenna_mask = 1;
205 	}
206 }
207 EXPORT_SYMBOL_GPL(mt76x02_init_device);
208 
209 void mt76x02_configure_filter(struct ieee80211_hw *hw,
210 			      unsigned int changed_flags,
211 			      unsigned int *total_flags, u64 multicast)
212 {
213 	struct mt76x02_dev *dev = hw->priv;
214 	u32 flags = 0;
215 
216 #define MT76_FILTER(_flag, _hw) do { \
217 		flags |= *total_flags & FIF_##_flag;			\
218 		dev->mt76.rxfilter &= ~(_hw);				\
219 		dev->mt76.rxfilter |= !(flags & FIF_##_flag) * (_hw);	\
220 	} while (0)
221 
222 	mutex_lock(&dev->mt76.mutex);
223 
224 	dev->mt76.rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
225 
226 	MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
227 	MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
228 	MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
229 			     MT_RX_FILTR_CFG_CTS |
230 			     MT_RX_FILTR_CFG_CFEND |
231 			     MT_RX_FILTR_CFG_CFACK |
232 			     MT_RX_FILTR_CFG_BA |
233 			     MT_RX_FILTR_CFG_CTRL_RSV);
234 	MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
235 
236 	*total_flags = flags;
237 	mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
238 
239 	mutex_unlock(&dev->mt76.mutex);
240 }
241 EXPORT_SYMBOL_GPL(mt76x02_configure_filter);
242 
243 int mt76x02_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
244 		    struct ieee80211_sta *sta)
245 {
246 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
247 	struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
248 	struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
249 	int idx = 0;
250 
251 	memset(msta, 0, sizeof(*msta));
252 
253 	idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT76x02_N_WCIDS);
254 	if (idx < 0)
255 		return -ENOSPC;
256 
257 	msta->vif = mvif;
258 	msta->wcid.sta = 1;
259 	msta->wcid.idx = idx;
260 	msta->wcid.hw_key_idx = -1;
261 	mt76x02_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
262 	mt76x02_mac_wcid_set_drop(dev, idx, false);
263 	ewma_pktlen_init(&msta->pktlen);
264 
265 	if (vif->type == NL80211_IFTYPE_AP)
266 		set_bit(MT_WCID_FLAG_CHECK_PS, &msta->wcid.flags);
267 
268 	return 0;
269 }
270 EXPORT_SYMBOL_GPL(mt76x02_sta_add);
271 
272 void mt76x02_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
273 			struct ieee80211_sta *sta)
274 {
275 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
276 	struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
277 	int idx = wcid->idx;
278 
279 	mt76x02_mac_wcid_set_drop(dev, idx, true);
280 	mt76x02_mac_wcid_setup(dev, idx, 0, NULL);
281 }
282 EXPORT_SYMBOL_GPL(mt76x02_sta_remove);
283 
284 static void
285 mt76x02_vif_init(struct mt76x02_dev *dev, struct ieee80211_vif *vif,
286 		 unsigned int idx)
287 {
288 	struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
289 	struct mt76_txq *mtxq;
290 
291 	memset(mvif, 0, sizeof(*mvif));
292 
293 	mvif->idx = idx;
294 	mvif->group_wcid.idx = MT_VIF_WCID(idx);
295 	mvif->group_wcid.hw_key_idx = -1;
296 	mtxq = (struct mt76_txq *)vif->txq->drv_priv;
297 	mtxq->wcid = &mvif->group_wcid;
298 }
299 
300 int
301 mt76x02_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
302 {
303 	struct mt76x02_dev *dev = hw->priv;
304 	unsigned int idx = 0;
305 
306 	/* Allow to change address in HW if we create first interface. */
307 	if (!dev->mphy.vif_mask &&
308 	    (((vif->addr[0] ^ dev->mphy.macaddr[0]) & ~GENMASK(4, 1)) ||
309 	     memcmp(vif->addr + 1, dev->mphy.macaddr + 1, ETH_ALEN - 1)))
310 		mt76x02_mac_setaddr(dev, vif->addr);
311 
312 	if (vif->addr[0] & BIT(1))
313 		idx = 1 + (((dev->mphy.macaddr[0] ^ vif->addr[0]) >> 2) & 7);
314 
315 	/*
316 	 * Client mode typically only has one configurable BSSID register,
317 	 * which is used for bssidx=0. This is linked to the MAC address.
318 	 * Since mac80211 allows changing interface types, and we cannot
319 	 * force the use of the primary MAC address for a station mode
320 	 * interface, we need some other way of configuring a per-interface
321 	 * remote BSSID.
322 	 * The hardware provides an AP-Client feature, where bssidx 0-7 are
323 	 * used for AP mode and bssidx 8-15 for client mode.
324 	 * We shift the station interface bss index by 8 to force the
325 	 * hardware to recognize the BSSID.
326 	 * The resulting bssidx mismatch for unicast frames is ignored by hw.
327 	 */
328 	if (vif->type == NL80211_IFTYPE_STATION)
329 		idx += 8;
330 
331 	/* vif is already set or idx is 8 for AP/Mesh/... */
332 	if (dev->mphy.vif_mask & BIT(idx) ||
333 	    (vif->type != NL80211_IFTYPE_STATION && idx > 7))
334 		return -EBUSY;
335 
336 	dev->mphy.vif_mask |= BIT(idx);
337 
338 	mt76x02_vif_init(dev, vif, idx);
339 	return 0;
340 }
341 EXPORT_SYMBOL_GPL(mt76x02_add_interface);
342 
343 void mt76x02_remove_interface(struct ieee80211_hw *hw,
344 			      struct ieee80211_vif *vif)
345 {
346 	struct mt76x02_dev *dev = hw->priv;
347 	struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
348 
349 	dev->mphy.vif_mask &= ~BIT(mvif->idx);
350 }
351 EXPORT_SYMBOL_GPL(mt76x02_remove_interface);
352 
353 int mt76x02_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
354 			 struct ieee80211_ampdu_params *params)
355 {
356 	enum ieee80211_ampdu_mlme_action action = params->action;
357 	struct ieee80211_sta *sta = params->sta;
358 	struct mt76x02_dev *dev = hw->priv;
359 	struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
360 	struct ieee80211_txq *txq = sta->txq[params->tid];
361 	u16 tid = params->tid;
362 	u16 ssn = params->ssn;
363 	struct mt76_txq *mtxq;
364 	int ret = 0;
365 
366 	if (!txq)
367 		return -EINVAL;
368 
369 	mtxq = (struct mt76_txq *)txq->drv_priv;
370 
371 	mutex_lock(&dev->mt76.mutex);
372 	switch (action) {
373 	case IEEE80211_AMPDU_RX_START:
374 		mt76_rx_aggr_start(&dev->mt76, &msta->wcid, tid,
375 				   ssn, params->buf_size);
376 		mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
377 		break;
378 	case IEEE80211_AMPDU_RX_STOP:
379 		mt76_rx_aggr_stop(&dev->mt76, &msta->wcid, tid);
380 		mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
381 			   BIT(16 + tid));
382 		break;
383 	case IEEE80211_AMPDU_TX_OPERATIONAL:
384 		mtxq->aggr = true;
385 		mtxq->send_bar = false;
386 		ieee80211_send_bar(vif, sta->addr, tid, mtxq->agg_ssn);
387 		break;
388 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
389 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
390 		mtxq->aggr = false;
391 		break;
392 	case IEEE80211_AMPDU_TX_START:
393 		mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(ssn);
394 		ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
395 		break;
396 	case IEEE80211_AMPDU_TX_STOP_CONT:
397 		mtxq->aggr = false;
398 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
399 		break;
400 	}
401 	mutex_unlock(&dev->mt76.mutex);
402 
403 	return ret;
404 }
405 EXPORT_SYMBOL_GPL(mt76x02_ampdu_action);
406 
407 int mt76x02_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
408 		    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
409 		    struct ieee80211_key_conf *key)
410 {
411 	struct mt76x02_dev *dev = hw->priv;
412 	struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
413 	struct mt76x02_sta *msta;
414 	struct mt76_wcid *wcid;
415 	int idx = key->keyidx;
416 	int ret;
417 
418 	/* fall back to sw encryption for unsupported ciphers */
419 	switch (key->cipher) {
420 	case WLAN_CIPHER_SUITE_WEP40:
421 	case WLAN_CIPHER_SUITE_WEP104:
422 	case WLAN_CIPHER_SUITE_TKIP:
423 	case WLAN_CIPHER_SUITE_CCMP:
424 		break;
425 	default:
426 		return -EOPNOTSUPP;
427 	}
428 
429 	/*
430 	 * The hardware does not support per-STA RX GTK, fall back
431 	 * to software mode for these.
432 	 */
433 	if ((vif->type == NL80211_IFTYPE_ADHOC ||
434 	     vif->type == NL80211_IFTYPE_MESH_POINT) &&
435 	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
436 	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
437 	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
438 		return -EOPNOTSUPP;
439 
440 	/*
441 	 * In USB AP mode, broadcast/multicast frames are setup in beacon
442 	 * data registers and sent via HW beacons engine, they require to
443 	 * be already encrypted.
444 	 */
445 	if (mt76_is_usb(&dev->mt76) &&
446 	    vif->type == NL80211_IFTYPE_AP &&
447 	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
448 		return -EOPNOTSUPP;
449 
450 	msta = sta ? (struct mt76x02_sta *)sta->drv_priv : NULL;
451 	wcid = msta ? &msta->wcid : &mvif->group_wcid;
452 
453 	if (cmd == SET_KEY) {
454 		key->hw_key_idx = wcid->idx;
455 		wcid->hw_key_idx = idx;
456 		if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
457 			key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
458 			wcid->sw_iv = true;
459 		}
460 	} else {
461 		if (idx == wcid->hw_key_idx) {
462 			wcid->hw_key_idx = -1;
463 			wcid->sw_iv = false;
464 		}
465 
466 		key = NULL;
467 	}
468 	mt76_wcid_key_setup(&dev->mt76, wcid, key);
469 
470 	if (!msta) {
471 		if (key || wcid->hw_key_idx == idx) {
472 			ret = mt76x02_mac_wcid_set_key(dev, wcid->idx, key);
473 			if (ret)
474 				return ret;
475 		}
476 
477 		return mt76x02_mac_shared_key_setup(dev, mvif->idx, idx, key);
478 	}
479 
480 	return mt76x02_mac_wcid_set_key(dev, msta->wcid.idx, key);
481 }
482 EXPORT_SYMBOL_GPL(mt76x02_set_key);
483 
484 int mt76x02_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
485 		    u16 queue, const struct ieee80211_tx_queue_params *params)
486 {
487 	struct mt76x02_dev *dev = hw->priv;
488 	u8 cw_min = 5, cw_max = 10, qid;
489 	u32 val;
490 
491 	qid = dev->mphy.q_tx[queue]->hw_idx;
492 
493 	if (params->cw_min)
494 		cw_min = fls(params->cw_min);
495 	if (params->cw_max)
496 		cw_max = fls(params->cw_max);
497 
498 	val = FIELD_PREP(MT_EDCA_CFG_TXOP, params->txop) |
499 	      FIELD_PREP(MT_EDCA_CFG_AIFSN, params->aifs) |
500 	      FIELD_PREP(MT_EDCA_CFG_CWMIN, cw_min) |
501 	      FIELD_PREP(MT_EDCA_CFG_CWMAX, cw_max);
502 	mt76_wr(dev, MT_EDCA_CFG_AC(qid), val);
503 
504 	val = mt76_rr(dev, MT_WMM_TXOP(qid));
505 	val &= ~(MT_WMM_TXOP_MASK << MT_WMM_TXOP_SHIFT(qid));
506 	val |= params->txop << MT_WMM_TXOP_SHIFT(qid);
507 	mt76_wr(dev, MT_WMM_TXOP(qid), val);
508 
509 	val = mt76_rr(dev, MT_WMM_AIFSN);
510 	val &= ~(MT_WMM_AIFSN_MASK << MT_WMM_AIFSN_SHIFT(qid));
511 	val |= params->aifs << MT_WMM_AIFSN_SHIFT(qid);
512 	mt76_wr(dev, MT_WMM_AIFSN, val);
513 
514 	val = mt76_rr(dev, MT_WMM_CWMIN);
515 	val &= ~(MT_WMM_CWMIN_MASK << MT_WMM_CWMIN_SHIFT(qid));
516 	val |= cw_min << MT_WMM_CWMIN_SHIFT(qid);
517 	mt76_wr(dev, MT_WMM_CWMIN, val);
518 
519 	val = mt76_rr(dev, MT_WMM_CWMAX);
520 	val &= ~(MT_WMM_CWMAX_MASK << MT_WMM_CWMAX_SHIFT(qid));
521 	val |= cw_max << MT_WMM_CWMAX_SHIFT(qid);
522 	mt76_wr(dev, MT_WMM_CWMAX, val);
523 
524 	return 0;
525 }
526 EXPORT_SYMBOL_GPL(mt76x02_conf_tx);
527 
528 void mt76x02_set_tx_ackto(struct mt76x02_dev *dev)
529 {
530 	u8 ackto, sifs, slottime = dev->slottime;
531 
532 	/* As defined by IEEE 802.11-2007 17.3.8.6 */
533 	slottime += 3 * dev->coverage_class;
534 	mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
535 		       MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
536 
537 	sifs = mt76_get_field(dev, MT_XIFS_TIME_CFG,
538 			      MT_XIFS_TIME_CFG_OFDM_SIFS);
539 
540 	ackto = slottime + sifs;
541 	mt76_rmw_field(dev, MT_TX_TIMEOUT_CFG,
542 		       MT_TX_TIMEOUT_CFG_ACKTO, ackto);
543 }
544 EXPORT_SYMBOL_GPL(mt76x02_set_tx_ackto);
545 
546 void mt76x02_set_coverage_class(struct ieee80211_hw *hw,
547 				s16 coverage_class)
548 {
549 	struct mt76x02_dev *dev = hw->priv;
550 
551 	mutex_lock(&dev->mt76.mutex);
552 	dev->coverage_class = max_t(s16, coverage_class, 0);
553 	mt76x02_set_tx_ackto(dev);
554 	mutex_unlock(&dev->mt76.mutex);
555 }
556 EXPORT_SYMBOL_GPL(mt76x02_set_coverage_class);
557 
558 int mt76x02_set_rts_threshold(struct ieee80211_hw *hw, u32 val)
559 {
560 	struct mt76x02_dev *dev = hw->priv;
561 
562 	if (val != ~0 && val > 0xffff)
563 		return -EINVAL;
564 
565 	mutex_lock(&dev->mt76.mutex);
566 	mt76x02_mac_set_rts_thresh(dev, val);
567 	mutex_unlock(&dev->mt76.mutex);
568 
569 	return 0;
570 }
571 EXPORT_SYMBOL_GPL(mt76x02_set_rts_threshold);
572 
573 void mt76x02_sta_rate_tbl_update(struct ieee80211_hw *hw,
574 				 struct ieee80211_vif *vif,
575 				 struct ieee80211_sta *sta)
576 {
577 	struct mt76x02_dev *dev = hw->priv;
578 	struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
579 	struct ieee80211_sta_rates *rates = rcu_dereference(sta->rates);
580 	struct ieee80211_tx_rate rate = {};
581 
582 	if (!rates)
583 		return;
584 
585 	rate.idx = rates->rate[0].idx;
586 	rate.flags = rates->rate[0].flags;
587 	mt76x02_mac_wcid_set_rate(dev, &msta->wcid, &rate);
588 }
589 EXPORT_SYMBOL_GPL(mt76x02_sta_rate_tbl_update);
590 
591 void mt76x02_remove_hdr_pad(struct sk_buff *skb, int len)
592 {
593 	int hdrlen;
594 
595 	if (!len)
596 		return;
597 
598 	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
599 	memmove(skb->data + len, skb->data, hdrlen);
600 	skb_pull(skb, len);
601 }
602 EXPORT_SYMBOL_GPL(mt76x02_remove_hdr_pad);
603 
604 void mt76x02_sw_scan_complete(struct ieee80211_hw *hw,
605 			      struct ieee80211_vif *vif)
606 {
607 	struct mt76x02_dev *dev = hw->priv;
608 
609 	clear_bit(MT76_SCANNING, &dev->mphy.state);
610 	if (dev->cal.gain_init_done) {
611 		/* Restore AGC gain and resume calibration after scanning. */
612 		dev->cal.low_gain = -1;
613 		ieee80211_queue_delayed_work(hw, &dev->cal_work, 0);
614 	}
615 }
616 EXPORT_SYMBOL_GPL(mt76x02_sw_scan_complete);
617 
618 void mt76x02_sta_ps(struct mt76_dev *mdev, struct ieee80211_sta *sta,
619 		    bool ps)
620 {
621 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
622 	struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
623 	int idx = msta->wcid.idx;
624 
625 	mt76_stop_tx_queues(&dev->mphy, sta, true);
626 	if (mt76_is_mmio(mdev))
627 		mt76x02_mac_wcid_set_drop(dev, idx, ps);
628 }
629 EXPORT_SYMBOL_GPL(mt76x02_sta_ps);
630 
631 void mt76x02_bss_info_changed(struct ieee80211_hw *hw,
632 			      struct ieee80211_vif *vif,
633 			      struct ieee80211_bss_conf *info,
634 			      u32 changed)
635 {
636 	struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
637 	struct mt76x02_dev *dev = hw->priv;
638 
639 	mutex_lock(&dev->mt76.mutex);
640 
641 	if (changed & BSS_CHANGED_BSSID)
642 		mt76x02_mac_set_bssid(dev, mvif->idx, info->bssid);
643 
644 	if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
645 		mt76x02_mac_set_tx_protection(dev, info->use_cts_prot,
646 					      info->ht_operation_mode);
647 
648 	if (changed & BSS_CHANGED_BEACON_INT) {
649 		mt76_rmw_field(dev, MT_BEACON_TIME_CFG,
650 			       MT_BEACON_TIME_CFG_INTVAL,
651 			       info->beacon_int << 4);
652 		dev->mt76.beacon_int = info->beacon_int;
653 	}
654 
655 	if (changed & BSS_CHANGED_BEACON_ENABLED)
656 		mt76x02_mac_set_beacon_enable(dev, vif, info->enable_beacon);
657 
658 	if (changed & BSS_CHANGED_ERP_PREAMBLE)
659 		mt76x02_mac_set_short_preamble(dev, info->use_short_preamble);
660 
661 	if (changed & BSS_CHANGED_ERP_SLOT) {
662 		int slottime = info->use_short_slot ? 9 : 20;
663 
664 		dev->slottime = slottime;
665 		mt76x02_set_tx_ackto(dev);
666 	}
667 
668 	mutex_unlock(&dev->mt76.mutex);
669 }
670 EXPORT_SYMBOL_GPL(mt76x02_bss_info_changed);
671 
672 void mt76x02_config_mac_addr_list(struct mt76x02_dev *dev)
673 {
674 	struct ieee80211_hw *hw = mt76_hw(dev);
675 	struct wiphy *wiphy = hw->wiphy;
676 	int i;
677 
678 	for (i = 0; i < ARRAY_SIZE(dev->macaddr_list); i++) {
679 		u8 *addr = dev->macaddr_list[i].addr;
680 
681 		memcpy(addr, dev->mphy.macaddr, ETH_ALEN);
682 
683 		if (!i)
684 			continue;
685 
686 		addr[0] |= BIT(1);
687 		addr[0] ^= ((i - 1) << 2);
688 	}
689 	wiphy->addresses = dev->macaddr_list;
690 	wiphy->n_addresses = ARRAY_SIZE(dev->macaddr_list);
691 }
692 EXPORT_SYMBOL_GPL(mt76x02_config_mac_addr_list);
693 
694 MODULE_LICENSE("Dual BSD/GPL");
695