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1/*
2 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15#include "mt7601u.h"
16#include "mac.h"
17#include <linux/etherdevice.h>
18
19static int mt7601u_start(struct ieee80211_hw *hw)
20{
21 struct mt7601u_dev *dev = hw->priv;
22 int ret;
23
24 mutex_lock(&dev->mutex);
25
26 ret = mt7601u_mac_start(dev);
27 if (ret)
28 goto out;
29
30 ieee80211_queue_delayed_work(dev->hw, &dev->mac_work,
31 MT_CALIBRATE_INTERVAL);
32 ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
33 MT_CALIBRATE_INTERVAL);
34out:
35 mutex_unlock(&dev->mutex);
36 return ret;
37}
38
39static void mt7601u_stop(struct ieee80211_hw *hw)
40{
41 struct mt7601u_dev *dev = hw->priv;
42
43 mutex_lock(&dev->mutex);
44
45 cancel_delayed_work_sync(&dev->cal_work);
46 cancel_delayed_work_sync(&dev->mac_work);
47 mt7601u_mac_stop(dev);
48
49 mutex_unlock(&dev->mutex);
50}
51
52static int mt7601u_add_interface(struct ieee80211_hw *hw,
53 struct ieee80211_vif *vif)
54{
55 struct mt7601u_dev *dev = hw->priv;
56 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
57 unsigned int idx = 0;
58 unsigned int wcid = GROUP_WCID(idx);
59
60 /* Note: for AP do the AP-STA things mt76 does:
61 * - beacon offsets
62 * - do mac address tricks
63 * - shift vif idx
64 */
65 mvif->idx = idx;
66
67 if (!ether_addr_equal(dev->macaddr, vif->addr))
68 mt7601u_set_macaddr(dev, vif->addr);
69
70 if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
71 return -ENOSPC;
72 dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
73 mvif->group_wcid.idx = wcid;
74 mvif->group_wcid.hw_key_idx = -1;
75
76 return 0;
77}
78
79static void mt7601u_remove_interface(struct ieee80211_hw *hw,
80 struct ieee80211_vif *vif)
81{
82 struct mt7601u_dev *dev = hw->priv;
83 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
84 unsigned int wcid = mvif->group_wcid.idx;
85
86 dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
87}
88
89static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
90{
91 struct mt7601u_dev *dev = hw->priv;
92 int ret = 0;
93
94 mutex_lock(&dev->mutex);
95
96 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
97 ieee80211_stop_queues(hw);
98 ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
99 ieee80211_wake_queues(hw);
100 }
101
102 mutex_unlock(&dev->mutex);
103
104 return ret;
105}
106
107static void
108mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
109 unsigned int *total_flags, u64 multicast)
110{
111 struct mt7601u_dev *dev = hw->priv;
112 u32 flags = 0;
113
114#define MT76_FILTER(_flag, _hw) do { \
115 flags |= *total_flags & FIF_##_flag; \
116 dev->rxfilter &= ~(_hw); \
117 dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \
118 } while (0)
119
120 mutex_lock(&dev->mutex);
121
122 dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
123
124 MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
125 MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
126 MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
127 MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
128 MT_RX_FILTR_CFG_CTS |
129 MT_RX_FILTR_CFG_CFEND |
130 MT_RX_FILTR_CFG_CFACK |
131 MT_RX_FILTR_CFG_BA |
132 MT_RX_FILTR_CFG_CTRL_RSV);
133 MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
134
135 *total_flags = flags;
136 mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
137
138 mutex_unlock(&dev->mutex);
139}
140
141static void
142mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
143 struct ieee80211_bss_conf *info, u32 changed)
144{
145 struct mt7601u_dev *dev = hw->priv;
146
147 mutex_lock(&dev->mutex);
148
149 if (changed & BSS_CHANGED_ASSOC)
150 mt7601u_phy_con_cal_onoff(dev, info);
151
152 if (changed & BSS_CHANGED_BSSID) {
153 mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
154
155 /* Note: this is a hack because beacon_int is not changed
156 * on leave nor is any more appropriate event generated.
157 * rt2x00 doesn't seem to be bothered though.
158 */
159 if (is_zero_ether_addr(info->bssid))
160 mt7601u_mac_config_tsf(dev, false, 0);
161 }
162
163 if (changed & BSS_CHANGED_BASIC_RATES) {
164 mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
165 mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
166 mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
167 mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
168 mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
169 }
170
171 if (changed & BSS_CHANGED_BEACON_INT)
172 mt7601u_mac_config_tsf(dev, true, info->beacon_int);
173
174 if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
175 mt7601u_mac_set_protection(dev, info->use_cts_prot,
176 info->ht_operation_mode);
177
178 if (changed & BSS_CHANGED_ERP_PREAMBLE)
179 mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);
180
181 if (changed & BSS_CHANGED_ERP_SLOT) {
182 int slottime = info->use_short_slot ? 9 : 20;
183
184 mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
185 MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
186 }
187
188 if (changed & BSS_CHANGED_ASSOC)
189 mt7601u_phy_recalibrate_after_assoc(dev);
190
191 mutex_unlock(&dev->mutex);
192}
193
194static int
195mt76_wcid_alloc(struct mt7601u_dev *dev)
196{
197 int i, idx = 0;
198
199 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
200 idx = ffs(~dev->wcid_mask[i]);
201 if (!idx)
202 continue;
203
204 idx--;
205 dev->wcid_mask[i] |= BIT(idx);
206 break;
207 }
208
209 idx = i * BITS_PER_LONG + idx;
210 if (idx > 119)
211 return -1;
212
213 return idx;
214}
215
216static int
217mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
218 struct ieee80211_sta *sta)
219{
220 struct mt7601u_dev *dev = hw->priv;
221 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
222 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
223 int ret = 0;
224 int idx = 0;
225
226 mutex_lock(&dev->mutex);
227
228 idx = mt76_wcid_alloc(dev);
229 if (idx < 0) {
230 ret = -ENOSPC;
231 goto out;
232 }
233
234 msta->wcid.idx = idx;
235 msta->wcid.hw_key_idx = -1;
236 mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
237 mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
238 rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
239 mt7601u_mac_set_ampdu_factor(dev);
240
241out:
242 mutex_unlock(&dev->mutex);
243
244 return ret;
245}
246
247static int
248mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
249 struct ieee80211_sta *sta)
250{
251 struct mt7601u_dev *dev = hw->priv;
252 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
253 int idx = msta->wcid.idx;
254
255 mutex_lock(&dev->mutex);
256 rcu_assign_pointer(dev->wcid[idx], NULL);
257 mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
258 dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
259 mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
260 mt7601u_mac_set_ampdu_factor(dev);
261 mutex_unlock(&dev->mutex);
262
263 return 0;
264}
265
266static void
267mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
268 enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
269{
270}
271
272static void
273mt7601u_sw_scan(struct ieee80211_hw *hw,
274 struct ieee80211_vif *vif,
275 const u8 *mac_addr)
276{
277 struct mt7601u_dev *dev = hw->priv;
278
279 mt7601u_agc_save(dev);
280 set_bit(MT7601U_STATE_SCANNING, &dev->state);
281}
282
283static void
284mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
285 struct ieee80211_vif *vif)
286{
287 struct mt7601u_dev *dev = hw->priv;
288
289 mt7601u_agc_restore(dev);
290 clear_bit(MT7601U_STATE_SCANNING, &dev->state);
291}
292
293static int
294mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
295 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
296 struct ieee80211_key_conf *key)
297{
298 struct mt7601u_dev *dev = hw->priv;
299 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
300 struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
301 struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
302 int idx = key->keyidx;
303 int ret;
304
305 if (cmd == SET_KEY) {
306 key->hw_key_idx = wcid->idx;
307 wcid->hw_key_idx = idx;
308 } else {
309 if (idx == wcid->hw_key_idx)
310 wcid->hw_key_idx = -1;
311
312 key = NULL;
313 }
314
315 if (!msta) {
316 if (key || wcid->hw_key_idx == idx) {
317 ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
318 if (ret)
319 return ret;
320 }
321
322 return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
323 }
324
325 return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
326}
327
328static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
329{
330 struct mt7601u_dev *dev = hw->priv;
331
332 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
333
334 return 0;
335}
336
337static int
338mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
339 struct ieee80211_ampdu_params *params)
340{
341 struct mt7601u_dev *dev = hw->priv;
342 struct ieee80211_sta *sta = params->sta;
343 enum ieee80211_ampdu_mlme_action action = params->action;
344 u16 tid = params->tid;
345 u16 *ssn = ¶ms->ssn;
346 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
347
348 WARN_ON(msta->wcid.idx > GROUP_WCID(0));
349
350 switch (action) {
351 case IEEE80211_AMPDU_RX_START:
352 mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
353 break;
354 case IEEE80211_AMPDU_RX_STOP:
355 mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
356 BIT(16 + tid));
357 break;
358 case IEEE80211_AMPDU_TX_OPERATIONAL:
359 ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
360 break;
361 case IEEE80211_AMPDU_TX_STOP_FLUSH:
362 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
363 break;
364 case IEEE80211_AMPDU_TX_START:
365 msta->agg_ssn[tid] = *ssn << 4;
366 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
367 break;
368 case IEEE80211_AMPDU_TX_STOP_CONT:
369 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
370 break;
371 }
372
373 return 0;
374}
375
376static void
377mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
378 struct ieee80211_sta *sta)
379{
380 struct mt7601u_dev *dev = hw->priv;
381 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
382 struct ieee80211_sta_rates *rates;
383 struct ieee80211_tx_rate rate = {};
384
385 rcu_read_lock();
386 rates = rcu_dereference(sta->rates);
387
388 if (!rates)
389 goto out;
390
391 rate.idx = rates->rate[0].idx;
392 rate.flags = rates->rate[0].flags;
393 mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
394
395out:
396 rcu_read_unlock();
397}
398
399const struct ieee80211_ops mt7601u_ops = {
400 .tx = mt7601u_tx,
401 .start = mt7601u_start,
402 .stop = mt7601u_stop,
403 .add_interface = mt7601u_add_interface,
404 .remove_interface = mt7601u_remove_interface,
405 .config = mt7601u_config,
406 .configure_filter = mt76_configure_filter,
407 .bss_info_changed = mt7601u_bss_info_changed,
408 .sta_add = mt7601u_sta_add,
409 .sta_remove = mt7601u_sta_remove,
410 .sta_notify = mt7601u_sta_notify,
411 .set_key = mt7601u_set_key,
412 .conf_tx = mt7601u_conf_tx,
413 .sw_scan_start = mt7601u_sw_scan,
414 .sw_scan_complete = mt7601u_sw_scan_complete,
415 .ampdu_action = mt76_ampdu_action,
416 .sta_rate_tbl_update = mt76_sta_rate_tbl_update,
417 .set_rts_threshold = mt7601u_set_rts_threshold,
418};