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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 (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
68 return -ENOSPC;
69 dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
70 mvif->group_wcid.idx = wcid;
71 mvif->group_wcid.hw_key_idx = -1;
72
73 return 0;
74}
75
76static void mt7601u_remove_interface(struct ieee80211_hw *hw,
77 struct ieee80211_vif *vif)
78{
79 struct mt7601u_dev *dev = hw->priv;
80 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
81 unsigned int wcid = mvif->group_wcid.idx;
82
83 dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
84}
85
86static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
87{
88 struct mt7601u_dev *dev = hw->priv;
89 int ret = 0;
90
91 mutex_lock(&dev->mutex);
92
93 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
94 ieee80211_stop_queues(hw);
95 ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
96 ieee80211_wake_queues(hw);
97 }
98
99 mutex_unlock(&dev->mutex);
100
101 return ret;
102}
103
104static void
105mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
106 unsigned int *total_flags, u64 multicast)
107{
108 struct mt7601u_dev *dev = hw->priv;
109 u32 flags = 0;
110
111#define MT76_FILTER(_flag, _hw) do { \
112 flags |= *total_flags & FIF_##_flag; \
113 dev->rxfilter &= ~(_hw); \
114 dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \
115 } while (0)
116
117 mutex_lock(&dev->mutex);
118
119 dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
120
121 MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
122 MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
123 MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
124 MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
125 MT_RX_FILTR_CFG_CTS |
126 MT_RX_FILTR_CFG_CFEND |
127 MT_RX_FILTR_CFG_CFACK |
128 MT_RX_FILTR_CFG_BA |
129 MT_RX_FILTR_CFG_CTRL_RSV);
130 MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
131
132 *total_flags = flags;
133 mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
134
135 mutex_unlock(&dev->mutex);
136}
137
138static void
139mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
140 struct ieee80211_bss_conf *info, u32 changed)
141{
142 struct mt7601u_dev *dev = hw->priv;
143
144 mutex_lock(&dev->mutex);
145
146 if (changed & BSS_CHANGED_ASSOC)
147 mt7601u_phy_con_cal_onoff(dev, info);
148
149 if (changed & BSS_CHANGED_BSSID) {
150 mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
151
152 /* Note: this is a hack because beacon_int is not changed
153 * on leave nor is any more appropriate event generated.
154 * rt2x00 doesn't seem to be bothered though.
155 */
156 if (is_zero_ether_addr(info->bssid))
157 mt7601u_mac_config_tsf(dev, false, 0);
158 }
159
160 if (changed & BSS_CHANGED_BASIC_RATES) {
161 mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
162 mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
163 mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
164 mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
165 mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
166 }
167
168 if (changed & BSS_CHANGED_BEACON_INT)
169 mt7601u_mac_config_tsf(dev, true, info->beacon_int);
170
171 if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
172 mt7601u_mac_set_protection(dev, info->use_cts_prot,
173 info->ht_operation_mode);
174
175 if (changed & BSS_CHANGED_ERP_PREAMBLE)
176 mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);
177
178 if (changed & BSS_CHANGED_ERP_SLOT) {
179 int slottime = info->use_short_slot ? 9 : 20;
180
181 mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
182 MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
183 }
184
185 if (changed & BSS_CHANGED_ASSOC)
186 mt7601u_phy_recalibrate_after_assoc(dev);
187
188 mutex_unlock(&dev->mutex);
189}
190
191static int
192mt76_wcid_alloc(struct mt7601u_dev *dev)
193{
194 int i, idx = 0;
195
196 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
197 idx = ffs(~dev->wcid_mask[i]);
198 if (!idx)
199 continue;
200
201 idx--;
202 dev->wcid_mask[i] |= BIT(idx);
203 break;
204 }
205
206 idx = i * BITS_PER_LONG + idx;
207 if (idx > 119)
208 return -1;
209
210 return idx;
211}
212
213static int
214mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
215 struct ieee80211_sta *sta)
216{
217 struct mt7601u_dev *dev = hw->priv;
218 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
219 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
220 int ret = 0;
221 int idx = 0;
222
223 mutex_lock(&dev->mutex);
224
225 idx = mt76_wcid_alloc(dev);
226 if (idx < 0) {
227 ret = -ENOSPC;
228 goto out;
229 }
230
231 msta->wcid.idx = idx;
232 msta->wcid.hw_key_idx = -1;
233 mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
234 mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
235 rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
236 mt7601u_mac_set_ampdu_factor(dev);
237
238out:
239 mutex_unlock(&dev->mutex);
240
241 return ret;
242}
243
244static int
245mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
246 struct ieee80211_sta *sta)
247{
248 struct mt7601u_dev *dev = hw->priv;
249 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
250 int idx = msta->wcid.idx;
251
252 mutex_lock(&dev->mutex);
253 rcu_assign_pointer(dev->wcid[idx], NULL);
254 mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
255 dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
256 mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
257 mt7601u_mac_set_ampdu_factor(dev);
258 mutex_unlock(&dev->mutex);
259
260 return 0;
261}
262
263static void
264mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
265 enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
266{
267}
268
269static void
270mt7601u_sw_scan(struct ieee80211_hw *hw,
271 struct ieee80211_vif *vif,
272 const u8 *mac_addr)
273{
274 struct mt7601u_dev *dev = hw->priv;
275
276 mt7601u_agc_save(dev);
277 set_bit(MT7601U_STATE_SCANNING, &dev->state);
278}
279
280static void
281mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
282 struct ieee80211_vif *vif)
283{
284 struct mt7601u_dev *dev = hw->priv;
285
286 mt7601u_agc_restore(dev);
287 clear_bit(MT7601U_STATE_SCANNING, &dev->state);
288}
289
290static int
291mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
292 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
293 struct ieee80211_key_conf *key)
294{
295 struct mt7601u_dev *dev = hw->priv;
296 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
297 struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
298 struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
299 int idx = key->keyidx;
300 int ret;
301
302 if (cmd == SET_KEY) {
303 key->hw_key_idx = wcid->idx;
304 wcid->hw_key_idx = idx;
305 } else {
306 if (idx == wcid->hw_key_idx)
307 wcid->hw_key_idx = -1;
308
309 key = NULL;
310 }
311
312 if (!msta) {
313 if (key || wcid->hw_key_idx == idx) {
314 ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
315 if (ret)
316 return ret;
317 }
318
319 return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
320 }
321
322 return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
323}
324
325static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
326{
327 struct mt7601u_dev *dev = hw->priv;
328
329 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
330
331 return 0;
332}
333
334static int
335mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
336 struct ieee80211_ampdu_params *params)
337{
338 struct mt7601u_dev *dev = hw->priv;
339 struct ieee80211_sta *sta = params->sta;
340 enum ieee80211_ampdu_mlme_action action = params->action;
341 u16 tid = params->tid;
342 u16 *ssn = ¶ms->ssn;
343 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
344
345 WARN_ON(msta->wcid.idx > GROUP_WCID(0));
346
347 switch (action) {
348 case IEEE80211_AMPDU_RX_START:
349 mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
350 break;
351 case IEEE80211_AMPDU_RX_STOP:
352 mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
353 BIT(16 + tid));
354 break;
355 case IEEE80211_AMPDU_TX_OPERATIONAL:
356 ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
357 break;
358 case IEEE80211_AMPDU_TX_STOP_FLUSH:
359 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
360 break;
361 case IEEE80211_AMPDU_TX_START:
362 msta->agg_ssn[tid] = *ssn << 4;
363 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
364 break;
365 case IEEE80211_AMPDU_TX_STOP_CONT:
366 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
367 break;
368 }
369
370 return 0;
371}
372
373static void
374mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
375 struct ieee80211_sta *sta)
376{
377 struct mt7601u_dev *dev = hw->priv;
378 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
379 struct ieee80211_sta_rates *rates;
380 struct ieee80211_tx_rate rate = {};
381
382 rcu_read_lock();
383 rates = rcu_dereference(sta->rates);
384
385 if (!rates)
386 goto out;
387
388 rate.idx = rates->rate[0].idx;
389 rate.flags = rates->rate[0].flags;
390 mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
391
392out:
393 rcu_read_unlock();
394}
395
396const struct ieee80211_ops mt7601u_ops = {
397 .tx = mt7601u_tx,
398 .start = mt7601u_start,
399 .stop = mt7601u_stop,
400 .add_interface = mt7601u_add_interface,
401 .remove_interface = mt7601u_remove_interface,
402 .config = mt7601u_config,
403 .configure_filter = mt76_configure_filter,
404 .bss_info_changed = mt7601u_bss_info_changed,
405 .sta_add = mt7601u_sta_add,
406 .sta_remove = mt7601u_sta_remove,
407 .sta_notify = mt7601u_sta_notify,
408 .set_key = mt7601u_set_key,
409 .conf_tx = mt7601u_conf_tx,
410 .sw_scan_start = mt7601u_sw_scan,
411 .sw_scan_complete = mt7601u_sw_scan_complete,
412 .ampdu_action = mt76_ampdu_action,
413 .sta_rate_tbl_update = mt76_sta_rate_tbl_update,
414 .set_rts_threshold = mt7601u_set_rts_threshold,
415};