Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[sfrench/cifs-2.6.git] / drivers / net / wireless / ath / ath9k / main.c
1 /*
2  * Copyright (c) 2008-2009 Atheros Communications Inc.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16
17 #include <linux/nl80211.h>
18 #include "ath9k.h"
19 #include "btcoex.h"
20
21 static void ath_cache_conf_rate(struct ath_softc *sc,
22                                 struct ieee80211_conf *conf)
23 {
24         switch (conf->channel->band) {
25         case IEEE80211_BAND_2GHZ:
26                 if (conf_is_ht20(conf))
27                         sc->cur_rate_mode = ATH9K_MODE_11NG_HT20;
28                 else if (conf_is_ht40_minus(conf))
29                         sc->cur_rate_mode = ATH9K_MODE_11NG_HT40MINUS;
30                 else if (conf_is_ht40_plus(conf))
31                         sc->cur_rate_mode = ATH9K_MODE_11NG_HT40PLUS;
32                 else
33                         sc->cur_rate_mode = ATH9K_MODE_11G;
34                 break;
35         case IEEE80211_BAND_5GHZ:
36                 if (conf_is_ht20(conf))
37                         sc->cur_rate_mode = ATH9K_MODE_11NA_HT20;
38                 else if (conf_is_ht40_minus(conf))
39                         sc->cur_rate_mode = ATH9K_MODE_11NA_HT40MINUS;
40                 else if (conf_is_ht40_plus(conf))
41                         sc->cur_rate_mode = ATH9K_MODE_11NA_HT40PLUS;
42                 else
43                         sc->cur_rate_mode = ATH9K_MODE_11A;
44                 break;
45         default:
46                 BUG_ON(1);
47                 break;
48         }
49 }
50
51 static void ath_update_txpow(struct ath_softc *sc)
52 {
53         struct ath_hw *ah = sc->sc_ah;
54
55         if (sc->curtxpow != sc->config.txpowlimit) {
56                 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
57                 /* read back in case value is clamped */
58                 sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
59         }
60 }
61
62 static u8 parse_mpdudensity(u8 mpdudensity)
63 {
64         /*
65          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
66          *   0 for no restriction
67          *   1 for 1/4 us
68          *   2 for 1/2 us
69          *   3 for 1 us
70          *   4 for 2 us
71          *   5 for 4 us
72          *   6 for 8 us
73          *   7 for 16 us
74          */
75         switch (mpdudensity) {
76         case 0:
77                 return 0;
78         case 1:
79         case 2:
80         case 3:
81                 /* Our lower layer calculations limit our precision to
82                    1 microsecond */
83                 return 1;
84         case 4:
85                 return 2;
86         case 5:
87                 return 4;
88         case 6:
89                 return 8;
90         case 7:
91                 return 16;
92         default:
93                 return 0;
94         }
95 }
96
97 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
98                                                 struct ieee80211_hw *hw)
99 {
100         struct ieee80211_channel *curchan = hw->conf.channel;
101         struct ath9k_channel *channel;
102         u8 chan_idx;
103
104         chan_idx = curchan->hw_value;
105         channel = &sc->sc_ah->channels[chan_idx];
106         ath9k_update_ichannel(sc, hw, channel);
107         return channel;
108 }
109
110 bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
111 {
112         unsigned long flags;
113         bool ret;
114
115         spin_lock_irqsave(&sc->sc_pm_lock, flags);
116         ret = ath9k_hw_setpower(sc->sc_ah, mode);
117         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
118
119         return ret;
120 }
121
122 void ath9k_ps_wakeup(struct ath_softc *sc)
123 {
124         unsigned long flags;
125
126         spin_lock_irqsave(&sc->sc_pm_lock, flags);
127         if (++sc->ps_usecount != 1)
128                 goto unlock;
129
130         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
131
132  unlock:
133         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
134 }
135
136 void ath9k_ps_restore(struct ath_softc *sc)
137 {
138         unsigned long flags;
139
140         spin_lock_irqsave(&sc->sc_pm_lock, flags);
141         if (--sc->ps_usecount != 0)
142                 goto unlock;
143
144         if (sc->ps_idle)
145                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
146         else if (sc->ps_enabled &&
147                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
148                               PS_WAIT_FOR_CAB |
149                               PS_WAIT_FOR_PSPOLL_DATA |
150                               PS_WAIT_FOR_TX_ACK)))
151                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
152
153  unlock:
154         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
155 }
156
157 static void ath_start_ani(struct ath_common *common)
158 {
159         struct ath_hw *ah = common->ah;
160         unsigned long timestamp = jiffies_to_msecs(jiffies);
161         struct ath_softc *sc = (struct ath_softc *) common->priv;
162
163         if (!(sc->sc_flags & SC_OP_ANI_RUN))
164                 return;
165
166         if (sc->sc_flags & SC_OP_OFFCHANNEL)
167                 return;
168
169         common->ani.longcal_timer = timestamp;
170         common->ani.shortcal_timer = timestamp;
171         common->ani.checkani_timer = timestamp;
172
173         mod_timer(&common->ani.timer,
174                   jiffies +
175                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
176 }
177
178 /*
179  * Set/change channels.  If the channel is really being changed, it's done
180  * by reseting the chip.  To accomplish this we must first cleanup any pending
181  * DMA, then restart stuff.
182 */
183 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
184                     struct ath9k_channel *hchan)
185 {
186         struct ath_wiphy *aphy = hw->priv;
187         struct ath_hw *ah = sc->sc_ah;
188         struct ath_common *common = ath9k_hw_common(ah);
189         struct ieee80211_conf *conf = &common->hw->conf;
190         bool fastcc = true, stopped;
191         struct ieee80211_channel *channel = hw->conf.channel;
192         struct ath9k_hw_cal_data *caldata = NULL;
193         int r;
194
195         if (sc->sc_flags & SC_OP_INVALID)
196                 return -EIO;
197
198         del_timer_sync(&common->ani.timer);
199         cancel_work_sync(&sc->paprd_work);
200         cancel_work_sync(&sc->hw_check_work);
201         cancel_delayed_work_sync(&sc->tx_complete_work);
202
203         ath9k_ps_wakeup(sc);
204
205         /*
206          * This is only performed if the channel settings have
207          * actually changed.
208          *
209          * To switch channels clear any pending DMA operations;
210          * wait long enough for the RX fifo to drain, reset the
211          * hardware at the new frequency, and then re-enable
212          * the relevant bits of the h/w.
213          */
214         ath9k_hw_set_interrupts(ah, 0);
215         ath_drain_all_txq(sc, false);
216         stopped = ath_stoprecv(sc);
217
218         /* XXX: do not flush receive queue here. We don't want
219          * to flush data frames already in queue because of
220          * changing channel. */
221
222         if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
223                 fastcc = false;
224
225         if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
226                 caldata = &aphy->caldata;
227
228         ath_print(common, ATH_DBG_CONFIG,
229                   "(%u MHz) -> (%u MHz), conf_is_ht40: %d\n",
230                   sc->sc_ah->curchan->channel,
231                   channel->center_freq, conf_is_ht40(conf));
232
233         spin_lock_bh(&sc->sc_resetlock);
234
235         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
236         if (r) {
237                 ath_print(common, ATH_DBG_FATAL,
238                           "Unable to reset channel (%u MHz), "
239                           "reset status %d\n",
240                           channel->center_freq, r);
241                 spin_unlock_bh(&sc->sc_resetlock);
242                 goto ps_restore;
243         }
244         spin_unlock_bh(&sc->sc_resetlock);
245
246         if (ath_startrecv(sc) != 0) {
247                 ath_print(common, ATH_DBG_FATAL,
248                           "Unable to restart recv logic\n");
249                 r = -EIO;
250                 goto ps_restore;
251         }
252
253         ath_cache_conf_rate(sc, &hw->conf);
254         ath_update_txpow(sc);
255         ath9k_hw_set_interrupts(ah, ah->imask);
256
257         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL | SC_OP_SCANNING))) {
258                 ath_start_ani(common);
259                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
260                 ath_beacon_config(sc, NULL);
261         }
262
263  ps_restore:
264         ath9k_ps_restore(sc);
265         return r;
266 }
267
268 static void ath_paprd_activate(struct ath_softc *sc)
269 {
270         struct ath_hw *ah = sc->sc_ah;
271         struct ath9k_hw_cal_data *caldata = ah->caldata;
272         int chain;
273
274         if (!caldata || !caldata->paprd_done)
275                 return;
276
277         ath9k_ps_wakeup(sc);
278         ar9003_paprd_enable(ah, false);
279         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
280                 if (!(ah->caps.tx_chainmask & BIT(chain)))
281                         continue;
282
283                 ar9003_paprd_populate_single_table(ah, caldata, chain);
284         }
285
286         ar9003_paprd_enable(ah, true);
287         ath9k_ps_restore(sc);
288 }
289
290 void ath_paprd_calibrate(struct work_struct *work)
291 {
292         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
293         struct ieee80211_hw *hw = sc->hw;
294         struct ath_hw *ah = sc->sc_ah;
295         struct ieee80211_hdr *hdr;
296         struct sk_buff *skb = NULL;
297         struct ieee80211_tx_info *tx_info;
298         int band = hw->conf.channel->band;
299         struct ieee80211_supported_band *sband = &sc->sbands[band];
300         struct ath_tx_control txctl;
301         struct ath9k_hw_cal_data *caldata = ah->caldata;
302         int qnum, ftype;
303         int chain_ok = 0;
304         int chain;
305         int len = 1800;
306         int time_left;
307         int i;
308
309         if (!caldata)
310                 return;
311
312         skb = alloc_skb(len, GFP_KERNEL);
313         if (!skb)
314                 return;
315
316         tx_info = IEEE80211_SKB_CB(skb);
317
318         skb_put(skb, len);
319         memset(skb->data, 0, len);
320         hdr = (struct ieee80211_hdr *)skb->data;
321         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
322         hdr->frame_control = cpu_to_le16(ftype);
323         hdr->duration_id = cpu_to_le16(10);
324         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
325         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
326         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
327
328         memset(&txctl, 0, sizeof(txctl));
329         qnum = sc->tx.hwq_map[WME_AC_BE];
330         txctl.txq = &sc->tx.txq[qnum];
331
332         ath9k_ps_wakeup(sc);
333         ar9003_paprd_init_table(ah);
334         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
335                 if (!(ah->caps.tx_chainmask & BIT(chain)))
336                         continue;
337
338                 chain_ok = 0;
339                 memset(tx_info, 0, sizeof(*tx_info));
340                 tx_info->band = band;
341
342                 for (i = 0; i < 4; i++) {
343                         tx_info->control.rates[i].idx = sband->n_bitrates - 1;
344                         tx_info->control.rates[i].count = 6;
345                 }
346
347                 init_completion(&sc->paprd_complete);
348                 ar9003_paprd_setup_gain_table(ah, chain);
349                 txctl.paprd = BIT(chain);
350                 if (ath_tx_start(hw, skb, &txctl) != 0)
351                         break;
352
353                 time_left = wait_for_completion_timeout(&sc->paprd_complete,
354                                 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
355                 if (!time_left) {
356                         ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
357                                   "Timeout waiting for paprd training on "
358                                   "TX chain %d\n",
359                                   chain);
360                         goto fail_paprd;
361                 }
362
363                 if (!ar9003_paprd_is_done(ah))
364                         break;
365
366                 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
367                         break;
368
369                 chain_ok = 1;
370         }
371         kfree_skb(skb);
372
373         if (chain_ok) {
374                 caldata->paprd_done = true;
375                 ath_paprd_activate(sc);
376         }
377
378 fail_paprd:
379         ath9k_ps_restore(sc);
380 }
381
382 /*
383  *  This routine performs the periodic noise floor calibration function
384  *  that is used to adjust and optimize the chip performance.  This
385  *  takes environmental changes (location, temperature) into account.
386  *  When the task is complete, it reschedules itself depending on the
387  *  appropriate interval that was calculated.
388  */
389 void ath_ani_calibrate(unsigned long data)
390 {
391         struct ath_softc *sc = (struct ath_softc *)data;
392         struct ath_hw *ah = sc->sc_ah;
393         struct ath_common *common = ath9k_hw_common(ah);
394         bool longcal = false;
395         bool shortcal = false;
396         bool aniflag = false;
397         unsigned int timestamp = jiffies_to_msecs(jiffies);
398         u32 cal_interval, short_cal_interval;
399
400         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
401                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
402
403         /* Only calibrate if awake */
404         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
405                 goto set_timer;
406
407         ath9k_ps_wakeup(sc);
408
409         /* Long calibration runs independently of short calibration. */
410         if ((timestamp - common->ani.longcal_timer) >= ATH_LONG_CALINTERVAL) {
411                 longcal = true;
412                 ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
413                 common->ani.longcal_timer = timestamp;
414         }
415
416         /* Short calibration applies only while caldone is false */
417         if (!common->ani.caldone) {
418                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
419                         shortcal = true;
420                         ath_print(common, ATH_DBG_ANI,
421                                   "shortcal @%lu\n", jiffies);
422                         common->ani.shortcal_timer = timestamp;
423                         common->ani.resetcal_timer = timestamp;
424                 }
425         } else {
426                 if ((timestamp - common->ani.resetcal_timer) >=
427                     ATH_RESTART_CALINTERVAL) {
428                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
429                         if (common->ani.caldone)
430                                 common->ani.resetcal_timer = timestamp;
431                 }
432         }
433
434         /* Verify whether we must check ANI */
435         if ((timestamp - common->ani.checkani_timer) >=
436              ah->config.ani_poll_interval) {
437                 aniflag = true;
438                 common->ani.checkani_timer = timestamp;
439         }
440
441         /* Skip all processing if there's nothing to do. */
442         if (longcal || shortcal || aniflag) {
443                 /* Call ANI routine if necessary */
444                 if (aniflag)
445                         ath9k_hw_ani_monitor(ah, ah->curchan);
446
447                 /* Perform calibration if necessary */
448                 if (longcal || shortcal) {
449                         common->ani.caldone =
450                                 ath9k_hw_calibrate(ah,
451                                                    ah->curchan,
452                                                    common->rx_chainmask,
453                                                    longcal);
454
455                         if (longcal)
456                                 common->ani.noise_floor = ath9k_hw_getchan_noise(ah,
457                                                                      ah->curchan);
458
459                         ath_print(common, ATH_DBG_ANI,
460                                   " calibrate chan %u/%x nf: %d\n",
461                                   ah->curchan->channel,
462                                   ah->curchan->channelFlags,
463                                   common->ani.noise_floor);
464                 }
465         }
466
467         ath9k_ps_restore(sc);
468
469 set_timer:
470         /*
471         * Set timer interval based on previous results.
472         * The interval must be the shortest necessary to satisfy ANI,
473         * short calibration and long calibration.
474         */
475         cal_interval = ATH_LONG_CALINTERVAL;
476         if (sc->sc_ah->config.enable_ani)
477                 cal_interval = min(cal_interval,
478                                    (u32)ah->config.ani_poll_interval);
479         if (!common->ani.caldone)
480                 cal_interval = min(cal_interval, (u32)short_cal_interval);
481
482         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
483         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
484                 if (!ah->caldata->paprd_done)
485                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
486                 else
487                         ath_paprd_activate(sc);
488         }
489 }
490
491 /*
492  * Update tx/rx chainmask. For legacy association,
493  * hard code chainmask to 1x1, for 11n association, use
494  * the chainmask configuration, for bt coexistence, use
495  * the chainmask configuration even in legacy mode.
496  */
497 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
498 {
499         struct ath_hw *ah = sc->sc_ah;
500         struct ath_common *common = ath9k_hw_common(ah);
501
502         if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
503             (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
504                 common->tx_chainmask = ah->caps.tx_chainmask;
505                 common->rx_chainmask = ah->caps.rx_chainmask;
506         } else {
507                 common->tx_chainmask = 1;
508                 common->rx_chainmask = 1;
509         }
510
511         ath_print(common, ATH_DBG_CONFIG,
512                   "tx chmask: %d, rx chmask: %d\n",
513                   common->tx_chainmask,
514                   common->rx_chainmask);
515 }
516
517 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
518 {
519         struct ath_node *an;
520
521         an = (struct ath_node *)sta->drv_priv;
522
523         if (sc->sc_flags & SC_OP_TXAGGR) {
524                 ath_tx_node_init(sc, an);
525                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
526                                      sta->ht_cap.ampdu_factor);
527                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
528                 an->last_rssi = ATH_RSSI_DUMMY_MARKER;
529         }
530 }
531
532 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
533 {
534         struct ath_node *an = (struct ath_node *)sta->drv_priv;
535
536         if (sc->sc_flags & SC_OP_TXAGGR)
537                 ath_tx_node_cleanup(sc, an);
538 }
539
540 void ath_hw_check(struct work_struct *work)
541 {
542         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
543         int i;
544
545         ath9k_ps_wakeup(sc);
546
547         for (i = 0; i < 3; i++) {
548                 if (ath9k_hw_check_alive(sc->sc_ah))
549                         goto out;
550
551                 msleep(1);
552         }
553         ath_reset(sc, false);
554
555 out:
556         ath9k_ps_restore(sc);
557 }
558
559 void ath9k_tasklet(unsigned long data)
560 {
561         struct ath_softc *sc = (struct ath_softc *)data;
562         struct ath_hw *ah = sc->sc_ah;
563         struct ath_common *common = ath9k_hw_common(ah);
564
565         u32 status = sc->intrstatus;
566         u32 rxmask;
567
568         ath9k_ps_wakeup(sc);
569
570         if (status & ATH9K_INT_FATAL) {
571                 ath_reset(sc, false);
572                 ath9k_ps_restore(sc);
573                 return;
574         }
575
576         if (!ath9k_hw_check_alive(ah))
577                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
578
579         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
580                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
581                           ATH9K_INT_RXORN);
582         else
583                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
584
585         if (status & rxmask) {
586                 spin_lock_bh(&sc->rx.rxflushlock);
587
588                 /* Check for high priority Rx first */
589                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
590                     (status & ATH9K_INT_RXHP))
591                         ath_rx_tasklet(sc, 0, true);
592
593                 ath_rx_tasklet(sc, 0, false);
594                 spin_unlock_bh(&sc->rx.rxflushlock);
595         }
596
597         if (status & ATH9K_INT_TX) {
598                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
599                         ath_tx_edma_tasklet(sc);
600                 else
601                         ath_tx_tasklet(sc);
602         }
603
604         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
605                 /*
606                  * TSF sync does not look correct; remain awake to sync with
607                  * the next Beacon.
608                  */
609                 ath_print(common, ATH_DBG_PS,
610                           "TSFOOR - Sync with next Beacon\n");
611                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
612         }
613
614         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
615                 if (status & ATH9K_INT_GENTIMER)
616                         ath_gen_timer_isr(sc->sc_ah);
617
618         /* re-enable hardware interrupt */
619         ath9k_hw_set_interrupts(ah, ah->imask);
620         ath9k_ps_restore(sc);
621 }
622
623 irqreturn_t ath_isr(int irq, void *dev)
624 {
625 #define SCHED_INTR (                            \
626                 ATH9K_INT_FATAL |               \
627                 ATH9K_INT_RXORN |               \
628                 ATH9K_INT_RXEOL |               \
629                 ATH9K_INT_RX |                  \
630                 ATH9K_INT_RXLP |                \
631                 ATH9K_INT_RXHP |                \
632                 ATH9K_INT_TX |                  \
633                 ATH9K_INT_BMISS |               \
634                 ATH9K_INT_CST |                 \
635                 ATH9K_INT_TSFOOR |              \
636                 ATH9K_INT_GENTIMER)
637
638         struct ath_softc *sc = dev;
639         struct ath_hw *ah = sc->sc_ah;
640         enum ath9k_int status;
641         bool sched = false;
642
643         /*
644          * The hardware is not ready/present, don't
645          * touch anything. Note this can happen early
646          * on if the IRQ is shared.
647          */
648         if (sc->sc_flags & SC_OP_INVALID)
649                 return IRQ_NONE;
650
651
652         /* shared irq, not for us */
653
654         if (!ath9k_hw_intrpend(ah))
655                 return IRQ_NONE;
656
657         /*
658          * Figure out the reason(s) for the interrupt.  Note
659          * that the hal returns a pseudo-ISR that may include
660          * bits we haven't explicitly enabled so we mask the
661          * value to insure we only process bits we requested.
662          */
663         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
664         status &= ah->imask;    /* discard unasked-for bits */
665
666         /*
667          * If there are no status bits set, then this interrupt was not
668          * for me (should have been caught above).
669          */
670         if (!status)
671                 return IRQ_NONE;
672
673         /* Cache the status */
674         sc->intrstatus = status;
675
676         if (status & SCHED_INTR)
677                 sched = true;
678
679         /*
680          * If a FATAL or RXORN interrupt is received, we have to reset the
681          * chip immediately.
682          */
683         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
684             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
685                 goto chip_reset;
686
687         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
688             (status & ATH9K_INT_BB_WATCHDOG)) {
689                 ar9003_hw_bb_watchdog_dbg_info(ah);
690                 goto chip_reset;
691         }
692
693         if (status & ATH9K_INT_SWBA)
694                 tasklet_schedule(&sc->bcon_tasklet);
695
696         if (status & ATH9K_INT_TXURN)
697                 ath9k_hw_updatetxtriglevel(ah, true);
698
699         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
700                 if (status & ATH9K_INT_RXEOL) {
701                         ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
702                         ath9k_hw_set_interrupts(ah, ah->imask);
703                 }
704         }
705
706         if (status & ATH9K_INT_MIB) {
707                 /*
708                  * Disable interrupts until we service the MIB
709                  * interrupt; otherwise it will continue to
710                  * fire.
711                  */
712                 ath9k_hw_set_interrupts(ah, 0);
713                 /*
714                  * Let the hal handle the event. We assume
715                  * it will clear whatever condition caused
716                  * the interrupt.
717                  */
718                 ath9k_hw_procmibevent(ah);
719                 ath9k_hw_set_interrupts(ah, ah->imask);
720         }
721
722         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
723                 if (status & ATH9K_INT_TIM_TIMER) {
724                         /* Clear RxAbort bit so that we can
725                          * receive frames */
726                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
727                         ath9k_hw_setrxabort(sc->sc_ah, 0);
728                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
729                 }
730
731 chip_reset:
732
733         ath_debug_stat_interrupt(sc, status);
734
735         if (sched) {
736                 /* turn off every interrupt except SWBA */
737                 ath9k_hw_set_interrupts(ah, (ah->imask & ATH9K_INT_SWBA));
738                 tasklet_schedule(&sc->intr_tq);
739         }
740
741         return IRQ_HANDLED;
742
743 #undef SCHED_INTR
744 }
745
746 static u32 ath_get_extchanmode(struct ath_softc *sc,
747                                struct ieee80211_channel *chan,
748                                enum nl80211_channel_type channel_type)
749 {
750         u32 chanmode = 0;
751
752         switch (chan->band) {
753         case IEEE80211_BAND_2GHZ:
754                 switch(channel_type) {
755                 case NL80211_CHAN_NO_HT:
756                 case NL80211_CHAN_HT20:
757                         chanmode = CHANNEL_G_HT20;
758                         break;
759                 case NL80211_CHAN_HT40PLUS:
760                         chanmode = CHANNEL_G_HT40PLUS;
761                         break;
762                 case NL80211_CHAN_HT40MINUS:
763                         chanmode = CHANNEL_G_HT40MINUS;
764                         break;
765                 }
766                 break;
767         case IEEE80211_BAND_5GHZ:
768                 switch(channel_type) {
769                 case NL80211_CHAN_NO_HT:
770                 case NL80211_CHAN_HT20:
771                         chanmode = CHANNEL_A_HT20;
772                         break;
773                 case NL80211_CHAN_HT40PLUS:
774                         chanmode = CHANNEL_A_HT40PLUS;
775                         break;
776                 case NL80211_CHAN_HT40MINUS:
777                         chanmode = CHANNEL_A_HT40MINUS;
778                         break;
779                 }
780                 break;
781         default:
782                 break;
783         }
784
785         return chanmode;
786 }
787
788 static void ath9k_bss_assoc_info(struct ath_softc *sc,
789                                  struct ieee80211_vif *vif,
790                                  struct ieee80211_bss_conf *bss_conf)
791 {
792         struct ath_hw *ah = sc->sc_ah;
793         struct ath_common *common = ath9k_hw_common(ah);
794
795         if (bss_conf->assoc) {
796                 ath_print(common, ATH_DBG_CONFIG,
797                           "Bss Info ASSOC %d, bssid: %pM\n",
798                            bss_conf->aid, common->curbssid);
799
800                 /* New association, store aid */
801                 common->curaid = bss_conf->aid;
802                 ath9k_hw_write_associd(ah);
803
804                 /*
805                  * Request a re-configuration of Beacon related timers
806                  * on the receipt of the first Beacon frame (i.e.,
807                  * after time sync with the AP).
808                  */
809                 sc->ps_flags |= PS_BEACON_SYNC;
810
811                 /* Configure the beacon */
812                 ath_beacon_config(sc, vif);
813
814                 /* Reset rssi stats */
815                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
816
817                 sc->sc_flags |= SC_OP_ANI_RUN;
818                 ath_start_ani(common);
819         } else {
820                 ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
821                 common->curaid = 0;
822                 /* Stop ANI */
823                 sc->sc_flags &= ~SC_OP_ANI_RUN;
824                 del_timer_sync(&common->ani.timer);
825         }
826 }
827
828 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
829 {
830         struct ath_hw *ah = sc->sc_ah;
831         struct ath_common *common = ath9k_hw_common(ah);
832         struct ieee80211_channel *channel = hw->conf.channel;
833         int r;
834
835         ath9k_ps_wakeup(sc);
836         ath9k_hw_configpcipowersave(ah, 0, 0);
837
838         if (!ah->curchan)
839                 ah->curchan = ath_get_curchannel(sc, sc->hw);
840
841         spin_lock_bh(&sc->sc_resetlock);
842         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
843         if (r) {
844                 ath_print(common, ATH_DBG_FATAL,
845                           "Unable to reset channel (%u MHz), "
846                           "reset status %d\n",
847                           channel->center_freq, r);
848         }
849         spin_unlock_bh(&sc->sc_resetlock);
850
851         ath_update_txpow(sc);
852         if (ath_startrecv(sc) != 0) {
853                 ath_print(common, ATH_DBG_FATAL,
854                           "Unable to restart recv logic\n");
855                 return;
856         }
857
858         if (sc->sc_flags & SC_OP_BEACONS)
859                 ath_beacon_config(sc, NULL);    /* restart beacons */
860
861         /* Re-Enable  interrupts */
862         ath9k_hw_set_interrupts(ah, ah->imask);
863
864         /* Enable LED */
865         ath9k_hw_cfg_output(ah, ah->led_pin,
866                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
867         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
868
869         ieee80211_wake_queues(hw);
870         ath9k_ps_restore(sc);
871 }
872
873 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
874 {
875         struct ath_hw *ah = sc->sc_ah;
876         struct ieee80211_channel *channel = hw->conf.channel;
877         int r;
878
879         ath9k_ps_wakeup(sc);
880         ieee80211_stop_queues(hw);
881
882         /*
883          * Keep the LED on when the radio is disabled
884          * during idle unassociated state.
885          */
886         if (!sc->ps_idle) {
887                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
888                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
889         }
890
891         /* Disable interrupts */
892         ath9k_hw_set_interrupts(ah, 0);
893
894         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
895         ath_stoprecv(sc);               /* turn off frame recv */
896         ath_flushrecv(sc);              /* flush recv queue */
897
898         if (!ah->curchan)
899                 ah->curchan = ath_get_curchannel(sc, hw);
900
901         spin_lock_bh(&sc->sc_resetlock);
902         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
903         if (r) {
904                 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
905                           "Unable to reset channel (%u MHz), "
906                           "reset status %d\n",
907                           channel->center_freq, r);
908         }
909         spin_unlock_bh(&sc->sc_resetlock);
910
911         ath9k_hw_phy_disable(ah);
912         ath9k_hw_configpcipowersave(ah, 1, 1);
913         ath9k_ps_restore(sc);
914         ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
915 }
916
917 int ath_reset(struct ath_softc *sc, bool retry_tx)
918 {
919         struct ath_hw *ah = sc->sc_ah;
920         struct ath_common *common = ath9k_hw_common(ah);
921         struct ieee80211_hw *hw = sc->hw;
922         int r;
923
924         /* Stop ANI */
925         del_timer_sync(&common->ani.timer);
926
927         ieee80211_stop_queues(hw);
928
929         ath9k_hw_set_interrupts(ah, 0);
930         ath_drain_all_txq(sc, retry_tx);
931         ath_stoprecv(sc);
932         ath_flushrecv(sc);
933
934         spin_lock_bh(&sc->sc_resetlock);
935         r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
936         if (r)
937                 ath_print(common, ATH_DBG_FATAL,
938                           "Unable to reset hardware; reset status %d\n", r);
939         spin_unlock_bh(&sc->sc_resetlock);
940
941         if (ath_startrecv(sc) != 0)
942                 ath_print(common, ATH_DBG_FATAL,
943                           "Unable to start recv logic\n");
944
945         /*
946          * We may be doing a reset in response to a request
947          * that changes the channel so update any state that
948          * might change as a result.
949          */
950         ath_cache_conf_rate(sc, &hw->conf);
951
952         ath_update_txpow(sc);
953
954         if (sc->sc_flags & SC_OP_BEACONS)
955                 ath_beacon_config(sc, NULL);    /* restart beacons */
956
957         ath9k_hw_set_interrupts(ah, ah->imask);
958
959         if (retry_tx) {
960                 int i;
961                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
962                         if (ATH_TXQ_SETUP(sc, i)) {
963                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
964                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
965                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
966                         }
967                 }
968         }
969
970         ieee80211_wake_queues(hw);
971
972         /* Start ANI */
973         ath_start_ani(common);
974
975         return r;
976 }
977
978 static int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
979 {
980         int qnum;
981
982         switch (queue) {
983         case 0:
984                 qnum = sc->tx.hwq_map[WME_AC_VO];
985                 break;
986         case 1:
987                 qnum = sc->tx.hwq_map[WME_AC_VI];
988                 break;
989         case 2:
990                 qnum = sc->tx.hwq_map[WME_AC_BE];
991                 break;
992         case 3:
993                 qnum = sc->tx.hwq_map[WME_AC_BK];
994                 break;
995         default:
996                 qnum = sc->tx.hwq_map[WME_AC_BE];
997                 break;
998         }
999
1000         return qnum;
1001 }
1002
1003 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
1004 {
1005         int qnum;
1006
1007         switch (queue) {
1008         case WME_AC_VO:
1009                 qnum = 0;
1010                 break;
1011         case WME_AC_VI:
1012                 qnum = 1;
1013                 break;
1014         case WME_AC_BE:
1015                 qnum = 2;
1016                 break;
1017         case WME_AC_BK:
1018                 qnum = 3;
1019                 break;
1020         default:
1021                 qnum = -1;
1022                 break;
1023         }
1024
1025         return qnum;
1026 }
1027
1028 /* XXX: Remove me once we don't depend on ath9k_channel for all
1029  * this redundant data */
1030 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1031                            struct ath9k_channel *ichan)
1032 {
1033         struct ieee80211_channel *chan = hw->conf.channel;
1034         struct ieee80211_conf *conf = &hw->conf;
1035
1036         ichan->channel = chan->center_freq;
1037         ichan->chan = chan;
1038
1039         if (chan->band == IEEE80211_BAND_2GHZ) {
1040                 ichan->chanmode = CHANNEL_G;
1041                 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1042         } else {
1043                 ichan->chanmode = CHANNEL_A;
1044                 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1045         }
1046
1047         if (conf_is_ht(conf))
1048                 ichan->chanmode = ath_get_extchanmode(sc, chan,
1049                                             conf->channel_type);
1050 }
1051
1052 /**********************/
1053 /* mac80211 callbacks */
1054 /**********************/
1055
1056 static int ath9k_start(struct ieee80211_hw *hw)
1057 {
1058         struct ath_wiphy *aphy = hw->priv;
1059         struct ath_softc *sc = aphy->sc;
1060         struct ath_hw *ah = sc->sc_ah;
1061         struct ath_common *common = ath9k_hw_common(ah);
1062         struct ieee80211_channel *curchan = hw->conf.channel;
1063         struct ath9k_channel *init_channel;
1064         int r;
1065
1066         ath_print(common, ATH_DBG_CONFIG,
1067                   "Starting driver with initial channel: %d MHz\n",
1068                   curchan->center_freq);
1069
1070         mutex_lock(&sc->mutex);
1071
1072         if (ath9k_wiphy_started(sc)) {
1073                 if (sc->chan_idx == curchan->hw_value) {
1074                         /*
1075                          * Already on the operational channel, the new wiphy
1076                          * can be marked active.
1077                          */
1078                         aphy->state = ATH_WIPHY_ACTIVE;
1079                         ieee80211_wake_queues(hw);
1080                 } else {
1081                         /*
1082                          * Another wiphy is on another channel, start the new
1083                          * wiphy in paused state.
1084                          */
1085                         aphy->state = ATH_WIPHY_PAUSED;
1086                         ieee80211_stop_queues(hw);
1087                 }
1088                 mutex_unlock(&sc->mutex);
1089                 return 0;
1090         }
1091         aphy->state = ATH_WIPHY_ACTIVE;
1092
1093         /* setup initial channel */
1094
1095         sc->chan_idx = curchan->hw_value;
1096
1097         init_channel = ath_get_curchannel(sc, hw);
1098
1099         /* Reset SERDES registers */
1100         ath9k_hw_configpcipowersave(ah, 0, 0);
1101
1102         /*
1103          * The basic interface to setting the hardware in a good
1104          * state is ``reset''.  On return the hardware is known to
1105          * be powered up and with interrupts disabled.  This must
1106          * be followed by initialization of the appropriate bits
1107          * and then setup of the interrupt mask.
1108          */
1109         spin_lock_bh(&sc->sc_resetlock);
1110         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1111         if (r) {
1112                 ath_print(common, ATH_DBG_FATAL,
1113                           "Unable to reset hardware; reset status %d "
1114                           "(freq %u MHz)\n", r,
1115                           curchan->center_freq);
1116                 spin_unlock_bh(&sc->sc_resetlock);
1117                 goto mutex_unlock;
1118         }
1119         spin_unlock_bh(&sc->sc_resetlock);
1120
1121         /*
1122          * This is needed only to setup initial state
1123          * but it's best done after a reset.
1124          */
1125         ath_update_txpow(sc);
1126
1127         /*
1128          * Setup the hardware after reset:
1129          * The receive engine is set going.
1130          * Frame transmit is handled entirely
1131          * in the frame output path; there's nothing to do
1132          * here except setup the interrupt mask.
1133          */
1134         if (ath_startrecv(sc) != 0) {
1135                 ath_print(common, ATH_DBG_FATAL,
1136                           "Unable to start recv logic\n");
1137                 r = -EIO;
1138                 goto mutex_unlock;
1139         }
1140
1141         /* Setup our intr mask. */
1142         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1143                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1144                     ATH9K_INT_GLOBAL;
1145
1146         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1147                 ah->imask |= ATH9K_INT_RXHP |
1148                              ATH9K_INT_RXLP |
1149                              ATH9K_INT_BB_WATCHDOG;
1150         else
1151                 ah->imask |= ATH9K_INT_RX;
1152
1153         if (ah->caps.hw_caps & ATH9K_HW_CAP_GTT)
1154                 ah->imask |= ATH9K_INT_GTT;
1155
1156         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1157                 ah->imask |= ATH9K_INT_CST;
1158
1159         ath_cache_conf_rate(sc, &hw->conf);
1160
1161         sc->sc_flags &= ~SC_OP_INVALID;
1162
1163         /* Disable BMISS interrupt when we're not associated */
1164         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1165         ath9k_hw_set_interrupts(ah, ah->imask);
1166
1167         ieee80211_wake_queues(hw);
1168
1169         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1170
1171         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1172             !ah->btcoex_hw.enabled) {
1173                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1174                                            AR_STOMP_LOW_WLAN_WGHT);
1175                 ath9k_hw_btcoex_enable(ah);
1176
1177                 if (common->bus_ops->bt_coex_prep)
1178                         common->bus_ops->bt_coex_prep(common);
1179                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1180                         ath9k_btcoex_timer_resume(sc);
1181         }
1182
1183 mutex_unlock:
1184         mutex_unlock(&sc->mutex);
1185
1186         return r;
1187 }
1188
1189 static int ath9k_tx(struct ieee80211_hw *hw,
1190                     struct sk_buff *skb)
1191 {
1192         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1193         struct ath_wiphy *aphy = hw->priv;
1194         struct ath_softc *sc = aphy->sc;
1195         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1196         struct ath_tx_control txctl;
1197         int padpos, padsize;
1198         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1199         int qnum;
1200
1201         if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1202                 ath_print(common, ATH_DBG_XMIT,
1203                           "ath9k: %s: TX in unexpected wiphy state "
1204                           "%d\n", wiphy_name(hw->wiphy), aphy->state);
1205                 goto exit;
1206         }
1207
1208         if (sc->ps_enabled) {
1209                 /*
1210                  * mac80211 does not set PM field for normal data frames, so we
1211                  * need to update that based on the current PS mode.
1212                  */
1213                 if (ieee80211_is_data(hdr->frame_control) &&
1214                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1215                     !ieee80211_has_pm(hdr->frame_control)) {
1216                         ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
1217                                   "while in PS mode\n");
1218                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1219                 }
1220         }
1221
1222         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1223                 /*
1224                  * We are using PS-Poll and mac80211 can request TX while in
1225                  * power save mode. Need to wake up hardware for the TX to be
1226                  * completed and if needed, also for RX of buffered frames.
1227                  */
1228                 ath9k_ps_wakeup(sc);
1229                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1230                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1231                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1232                         ath_print(common, ATH_DBG_PS,
1233                                   "Sending PS-Poll to pick a buffered frame\n");
1234                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1235                 } else {
1236                         ath_print(common, ATH_DBG_PS,
1237                                   "Wake up to complete TX\n");
1238                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1239                 }
1240                 /*
1241                  * The actual restore operation will happen only after
1242                  * the sc_flags bit is cleared. We are just dropping
1243                  * the ps_usecount here.
1244                  */
1245                 ath9k_ps_restore(sc);
1246         }
1247
1248         memset(&txctl, 0, sizeof(struct ath_tx_control));
1249
1250         /*
1251          * As a temporary workaround, assign seq# here; this will likely need
1252          * to be cleaned up to work better with Beacon transmission and virtual
1253          * BSSes.
1254          */
1255         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1256                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1257                         sc->tx.seq_no += 0x10;
1258                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1259                 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
1260         }
1261
1262         /* Add the padding after the header if this is not already done */
1263         padpos = ath9k_cmn_padpos(hdr->frame_control);
1264         padsize = padpos & 3;
1265         if (padsize && skb->len>padpos) {
1266                 if (skb_headroom(skb) < padsize)
1267                         return -1;
1268                 skb_push(skb, padsize);
1269                 memmove(skb->data, skb->data + padsize, padpos);
1270         }
1271
1272         qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
1273         txctl.txq = &sc->tx.txq[qnum];
1274
1275         ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1276
1277         if (ath_tx_start(hw, skb, &txctl) != 0) {
1278                 ath_print(common, ATH_DBG_XMIT, "TX failed\n");
1279                 goto exit;
1280         }
1281
1282         return 0;
1283 exit:
1284         dev_kfree_skb_any(skb);
1285         return 0;
1286 }
1287
1288 static void ath9k_stop(struct ieee80211_hw *hw)
1289 {
1290         struct ath_wiphy *aphy = hw->priv;
1291         struct ath_softc *sc = aphy->sc;
1292         struct ath_hw *ah = sc->sc_ah;
1293         struct ath_common *common = ath9k_hw_common(ah);
1294         int i;
1295
1296         mutex_lock(&sc->mutex);
1297
1298         aphy->state = ATH_WIPHY_INACTIVE;
1299
1300         if (led_blink)
1301                 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1302
1303         cancel_delayed_work_sync(&sc->tx_complete_work);
1304         cancel_work_sync(&sc->paprd_work);
1305         cancel_work_sync(&sc->hw_check_work);
1306
1307         for (i = 0; i < sc->num_sec_wiphy; i++) {
1308                 if (sc->sec_wiphy[i])
1309                         break;
1310         }
1311
1312         if (i == sc->num_sec_wiphy) {
1313                 cancel_delayed_work_sync(&sc->wiphy_work);
1314                 cancel_work_sync(&sc->chan_work);
1315         }
1316
1317         if (sc->sc_flags & SC_OP_INVALID) {
1318                 ath_print(common, ATH_DBG_ANY, "Device not present\n");
1319                 mutex_unlock(&sc->mutex);
1320                 return;
1321         }
1322
1323         if (ath9k_wiphy_started(sc)) {
1324                 mutex_unlock(&sc->mutex);
1325                 return; /* another wiphy still in use */
1326         }
1327
1328         /* Ensure HW is awake when we try to shut it down. */
1329         ath9k_ps_wakeup(sc);
1330
1331         if (ah->btcoex_hw.enabled) {
1332                 ath9k_hw_btcoex_disable(ah);
1333                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1334                         ath9k_btcoex_timer_pause(sc);
1335         }
1336
1337         /* make sure h/w will not generate any interrupt
1338          * before setting the invalid flag. */
1339         ath9k_hw_set_interrupts(ah, 0);
1340
1341         if (!(sc->sc_flags & SC_OP_INVALID)) {
1342                 ath_drain_all_txq(sc, false);
1343                 ath_stoprecv(sc);
1344                 ath9k_hw_phy_disable(ah);
1345         } else
1346                 sc->rx.rxlink = NULL;
1347
1348         /* disable HAL and put h/w to sleep */
1349         ath9k_hw_disable(ah);
1350         ath9k_hw_configpcipowersave(ah, 1, 1);
1351         ath9k_ps_restore(sc);
1352
1353         /* Finally, put the chip in FULL SLEEP mode */
1354         ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
1355
1356         sc->sc_flags |= SC_OP_INVALID;
1357
1358         mutex_unlock(&sc->mutex);
1359
1360         ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
1361 }
1362
1363 static int ath9k_add_interface(struct ieee80211_hw *hw,
1364                                struct ieee80211_vif *vif)
1365 {
1366         struct ath_wiphy *aphy = hw->priv;
1367         struct ath_softc *sc = aphy->sc;
1368         struct ath_hw *ah = sc->sc_ah;
1369         struct ath_common *common = ath9k_hw_common(ah);
1370         struct ath_vif *avp = (void *)vif->drv_priv;
1371         enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1372         int ret = 0;
1373
1374         mutex_lock(&sc->mutex);
1375
1376         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) &&
1377             sc->nvifs > 0) {
1378                 ret = -ENOBUFS;
1379                 goto out;
1380         }
1381
1382         switch (vif->type) {
1383         case NL80211_IFTYPE_STATION:
1384                 ic_opmode = NL80211_IFTYPE_STATION;
1385                 break;
1386         case NL80211_IFTYPE_ADHOC:
1387         case NL80211_IFTYPE_AP:
1388         case NL80211_IFTYPE_MESH_POINT:
1389                 if (sc->nbcnvifs >= ATH_BCBUF) {
1390                         ret = -ENOBUFS;
1391                         goto out;
1392                 }
1393                 ic_opmode = vif->type;
1394                 break;
1395         default:
1396                 ath_print(common, ATH_DBG_FATAL,
1397                         "Interface type %d not yet supported\n", vif->type);
1398                 ret = -EOPNOTSUPP;
1399                 goto out;
1400         }
1401
1402         ath_print(common, ATH_DBG_CONFIG,
1403                   "Attach a VIF of type: %d\n", ic_opmode);
1404
1405         /* Set the VIF opmode */
1406         avp->av_opmode = ic_opmode;
1407         avp->av_bslot = -1;
1408
1409         sc->nvifs++;
1410
1411         if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
1412                 ath9k_set_bssid_mask(hw);
1413
1414         if (sc->nvifs > 1)
1415                 goto out; /* skip global settings for secondary vif */
1416
1417         if (ic_opmode == NL80211_IFTYPE_AP) {
1418                 ath9k_hw_set_tsfadjust(ah, 1);
1419                 sc->sc_flags |= SC_OP_TSF_RESET;
1420         }
1421
1422         /* Set the device opmode */
1423         ah->opmode = ic_opmode;
1424
1425         /*
1426          * Enable MIB interrupts when there are hardware phy counters.
1427          * Note we only do this (at the moment) for station mode.
1428          */
1429         if ((vif->type == NL80211_IFTYPE_STATION) ||
1430             (vif->type == NL80211_IFTYPE_ADHOC) ||
1431             (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1432                 if (ah->config.enable_ani)
1433                         ah->imask |= ATH9K_INT_MIB;
1434                 ah->imask |= ATH9K_INT_TSFOOR;
1435         }
1436
1437         ath9k_hw_set_interrupts(ah, ah->imask);
1438
1439         if (vif->type == NL80211_IFTYPE_AP    ||
1440             vif->type == NL80211_IFTYPE_ADHOC ||
1441             vif->type == NL80211_IFTYPE_MONITOR) {
1442                 sc->sc_flags |= SC_OP_ANI_RUN;
1443                 ath_start_ani(common);
1444         }
1445
1446 out:
1447         mutex_unlock(&sc->mutex);
1448         return ret;
1449 }
1450
1451 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1452                                    struct ieee80211_vif *vif)
1453 {
1454         struct ath_wiphy *aphy = hw->priv;
1455         struct ath_softc *sc = aphy->sc;
1456         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1457         struct ath_vif *avp = (void *)vif->drv_priv;
1458         int i;
1459
1460         ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
1461
1462         mutex_lock(&sc->mutex);
1463
1464         /* Stop ANI */
1465         sc->sc_flags &= ~SC_OP_ANI_RUN;
1466         del_timer_sync(&common->ani.timer);
1467
1468         /* Reclaim beacon resources */
1469         if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1470             (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1471             (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
1472                 ath9k_ps_wakeup(sc);
1473                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1474                 ath9k_ps_restore(sc);
1475         }
1476
1477         ath_beacon_return(sc, avp);
1478         sc->sc_flags &= ~SC_OP_BEACONS;
1479
1480         for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
1481                 if (sc->beacon.bslot[i] == vif) {
1482                         printk(KERN_DEBUG "%s: vif had allocated beacon "
1483                                "slot\n", __func__);
1484                         sc->beacon.bslot[i] = NULL;
1485                         sc->beacon.bslot_aphy[i] = NULL;
1486                 }
1487         }
1488
1489         sc->nvifs--;
1490
1491         mutex_unlock(&sc->mutex);
1492 }
1493
1494 void ath9k_enable_ps(struct ath_softc *sc)
1495 {
1496         struct ath_hw *ah = sc->sc_ah;
1497
1498         sc->ps_enabled = true;
1499         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1500                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1501                         ah->imask |= ATH9K_INT_TIM_TIMER;
1502                         ath9k_hw_set_interrupts(ah, ah->imask);
1503                 }
1504                 ath9k_hw_setrxabort(ah, 1);
1505         }
1506 }
1507
1508 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1509 {
1510         struct ath_wiphy *aphy = hw->priv;
1511         struct ath_softc *sc = aphy->sc;
1512         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1513         struct ieee80211_conf *conf = &hw->conf;
1514         struct ath_hw *ah = sc->sc_ah;
1515         bool disable_radio;
1516
1517         mutex_lock(&sc->mutex);
1518
1519         /*
1520          * Leave this as the first check because we need to turn on the
1521          * radio if it was disabled before prior to processing the rest
1522          * of the changes. Likewise we must only disable the radio towards
1523          * the end.
1524          */
1525         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1526                 bool enable_radio;
1527                 bool all_wiphys_idle;
1528                 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1529
1530                 spin_lock_bh(&sc->wiphy_lock);
1531                 all_wiphys_idle =  ath9k_all_wiphys_idle(sc);
1532                 ath9k_set_wiphy_idle(aphy, idle);
1533
1534                 enable_radio = (!idle && all_wiphys_idle);
1535
1536                 /*
1537                  * After we unlock here its possible another wiphy
1538                  * can be re-renabled so to account for that we will
1539                  * only disable the radio toward the end of this routine
1540                  * if by then all wiphys are still idle.
1541                  */
1542                 spin_unlock_bh(&sc->wiphy_lock);
1543
1544                 if (enable_radio) {
1545                         sc->ps_idle = false;
1546                         ath_radio_enable(sc, hw);
1547                         ath_print(common, ATH_DBG_CONFIG,
1548                                   "not-idle: enabling radio\n");
1549                 }
1550         }
1551
1552         /*
1553          * We just prepare to enable PS. We have to wait until our AP has
1554          * ACK'd our null data frame to disable RX otherwise we'll ignore
1555          * those ACKs and end up retransmitting the same null data frames.
1556          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1557          */
1558         if (changed & IEEE80211_CONF_CHANGE_PS) {
1559                 if (conf->flags & IEEE80211_CONF_PS) {
1560                         sc->ps_flags |= PS_ENABLED;
1561                         /*
1562                          * At this point we know hardware has received an ACK
1563                          * of a previously sent null data frame.
1564                          */
1565                         if ((sc->ps_flags & PS_NULLFUNC_COMPLETED)) {
1566                                 sc->ps_flags &= ~PS_NULLFUNC_COMPLETED;
1567                                 ath9k_enable_ps(sc);
1568                         }
1569                 } else {
1570                         sc->ps_enabled = false;
1571                         sc->ps_flags &= ~(PS_ENABLED |
1572                                           PS_NULLFUNC_COMPLETED);
1573                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
1574                         if (!(ah->caps.hw_caps &
1575                               ATH9K_HW_CAP_AUTOSLEEP)) {
1576                                 ath9k_hw_setrxabort(sc->sc_ah, 0);
1577                                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1578                                                   PS_WAIT_FOR_CAB |
1579                                                   PS_WAIT_FOR_PSPOLL_DATA |
1580                                                   PS_WAIT_FOR_TX_ACK);
1581                                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1582                                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1583                                         ath9k_hw_set_interrupts(sc->sc_ah,
1584                                                         ah->imask);
1585                                 }
1586                         }
1587                 }
1588         }
1589
1590         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1591                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1592                         ath_print(common, ATH_DBG_CONFIG,
1593                                   "HW opmode set to Monitor mode\n");
1594                         sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
1595                 }
1596         }
1597
1598         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1599                 struct ieee80211_channel *curchan = hw->conf.channel;
1600                 int pos = curchan->hw_value;
1601
1602                 aphy->chan_idx = pos;
1603                 aphy->chan_is_ht = conf_is_ht(conf);
1604                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1605                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1606                 else
1607                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1608
1609                 if (aphy->state == ATH_WIPHY_SCAN ||
1610                     aphy->state == ATH_WIPHY_ACTIVE)
1611                         ath9k_wiphy_pause_all_forced(sc, aphy);
1612                 else {
1613                         /*
1614                          * Do not change operational channel based on a paused
1615                          * wiphy changes.
1616                          */
1617                         goto skip_chan_change;
1618                 }
1619
1620                 ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1621                           curchan->center_freq);
1622
1623                 /* XXX: remove me eventualy */
1624                 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1625
1626                 ath_update_chainmask(sc, conf_is_ht(conf));
1627
1628                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1629                         ath_print(common, ATH_DBG_FATAL,
1630                                   "Unable to set channel\n");
1631                         mutex_unlock(&sc->mutex);
1632                         return -EINVAL;
1633                 }
1634         }
1635
1636 skip_chan_change:
1637         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1638                 sc->config.txpowlimit = 2 * conf->power_level;
1639                 ath_update_txpow(sc);
1640         }
1641
1642         spin_lock_bh(&sc->wiphy_lock);
1643         disable_radio = ath9k_all_wiphys_idle(sc);
1644         spin_unlock_bh(&sc->wiphy_lock);
1645
1646         if (disable_radio) {
1647                 ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1648                 sc->ps_idle = true;
1649                 ath_radio_disable(sc, hw);
1650         }
1651
1652         mutex_unlock(&sc->mutex);
1653
1654         return 0;
1655 }
1656
1657 #define SUPPORTED_FILTERS                       \
1658         (FIF_PROMISC_IN_BSS |                   \
1659         FIF_ALLMULTI |                          \
1660         FIF_CONTROL |                           \
1661         FIF_PSPOLL |                            \
1662         FIF_OTHER_BSS |                         \
1663         FIF_BCN_PRBRESP_PROMISC |               \
1664         FIF_FCSFAIL)
1665
1666 /* FIXME: sc->sc_full_reset ? */
1667 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1668                                    unsigned int changed_flags,
1669                                    unsigned int *total_flags,
1670                                    u64 multicast)
1671 {
1672         struct ath_wiphy *aphy = hw->priv;
1673         struct ath_softc *sc = aphy->sc;
1674         u32 rfilt;
1675
1676         changed_flags &= SUPPORTED_FILTERS;
1677         *total_flags &= SUPPORTED_FILTERS;
1678
1679         sc->rx.rxfilter = *total_flags;
1680         ath9k_ps_wakeup(sc);
1681         rfilt = ath_calcrxfilter(sc);
1682         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1683         ath9k_ps_restore(sc);
1684
1685         ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1686                   "Set HW RX filter: 0x%x\n", rfilt);
1687 }
1688
1689 static int ath9k_sta_add(struct ieee80211_hw *hw,
1690                          struct ieee80211_vif *vif,
1691                          struct ieee80211_sta *sta)
1692 {
1693         struct ath_wiphy *aphy = hw->priv;
1694         struct ath_softc *sc = aphy->sc;
1695
1696         ath_node_attach(sc, sta);
1697
1698         return 0;
1699 }
1700
1701 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1702                             struct ieee80211_vif *vif,
1703                             struct ieee80211_sta *sta)
1704 {
1705         struct ath_wiphy *aphy = hw->priv;
1706         struct ath_softc *sc = aphy->sc;
1707
1708         ath_node_detach(sc, sta);
1709
1710         return 0;
1711 }
1712
1713 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1714                          const struct ieee80211_tx_queue_params *params)
1715 {
1716         struct ath_wiphy *aphy = hw->priv;
1717         struct ath_softc *sc = aphy->sc;
1718         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1719         struct ath9k_tx_queue_info qi;
1720         int ret = 0, qnum;
1721
1722         if (queue >= WME_NUM_AC)
1723                 return 0;
1724
1725         mutex_lock(&sc->mutex);
1726
1727         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1728
1729         qi.tqi_aifs = params->aifs;
1730         qi.tqi_cwmin = params->cw_min;
1731         qi.tqi_cwmax = params->cw_max;
1732         qi.tqi_burstTime = params->txop;
1733         qnum = ath_get_hal_qnum(queue, sc);
1734
1735         ath_print(common, ATH_DBG_CONFIG,
1736                   "Configure tx [queue/halq] [%d/%d],  "
1737                   "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1738                   queue, qnum, params->aifs, params->cw_min,
1739                   params->cw_max, params->txop);
1740
1741         ret = ath_txq_update(sc, qnum, &qi);
1742         if (ret)
1743                 ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
1744
1745         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1746                 if ((qnum == sc->tx.hwq_map[WME_AC_BE]) && !ret)
1747                         ath_beaconq_config(sc);
1748
1749         mutex_unlock(&sc->mutex);
1750
1751         return ret;
1752 }
1753
1754 static int ath9k_set_key(struct ieee80211_hw *hw,
1755                          enum set_key_cmd cmd,
1756                          struct ieee80211_vif *vif,
1757                          struct ieee80211_sta *sta,
1758                          struct ieee80211_key_conf *key)
1759 {
1760         struct ath_wiphy *aphy = hw->priv;
1761         struct ath_softc *sc = aphy->sc;
1762         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1763         int ret = 0;
1764
1765         if (modparam_nohwcrypt)
1766                 return -ENOSPC;
1767
1768         mutex_lock(&sc->mutex);
1769         ath9k_ps_wakeup(sc);
1770         ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
1771
1772         switch (cmd) {
1773         case SET_KEY:
1774                 ret = ath9k_cmn_key_config(common, vif, sta, key);
1775                 if (ret >= 0) {
1776                         key->hw_key_idx = ret;
1777                         /* push IV and Michael MIC generation to stack */
1778                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1779                         if (key->alg == ALG_TKIP)
1780                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1781                         if (sc->sc_ah->sw_mgmt_crypto && key->alg == ALG_CCMP)
1782                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1783                         ret = 0;
1784                 }
1785                 break;
1786         case DISABLE_KEY:
1787                 ath9k_cmn_key_delete(common, key);
1788                 break;
1789         default:
1790                 ret = -EINVAL;
1791         }
1792
1793         ath9k_ps_restore(sc);
1794         mutex_unlock(&sc->mutex);
1795
1796         return ret;
1797 }
1798
1799 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1800                                    struct ieee80211_vif *vif,
1801                                    struct ieee80211_bss_conf *bss_conf,
1802                                    u32 changed)
1803 {
1804         struct ath_wiphy *aphy = hw->priv;
1805         struct ath_softc *sc = aphy->sc;
1806         struct ath_hw *ah = sc->sc_ah;
1807         struct ath_common *common = ath9k_hw_common(ah);
1808         struct ath_vif *avp = (void *)vif->drv_priv;
1809         int slottime;
1810         int error;
1811
1812         mutex_lock(&sc->mutex);
1813
1814         if (changed & BSS_CHANGED_BSSID) {
1815                 /* Set BSSID */
1816                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1817                 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1818                 common->curaid = 0;
1819                 ath9k_hw_write_associd(ah);
1820
1821                 /* Set aggregation protection mode parameters */
1822                 sc->config.ath_aggr_prot = 0;
1823
1824                 /* Only legacy IBSS for now */
1825                 if (vif->type == NL80211_IFTYPE_ADHOC)
1826                         ath_update_chainmask(sc, 0);
1827
1828                 ath_print(common, ATH_DBG_CONFIG,
1829                           "BSSID: %pM aid: 0x%x\n",
1830                           common->curbssid, common->curaid);
1831
1832                 /* need to reconfigure the beacon */
1833                 sc->sc_flags &= ~SC_OP_BEACONS ;
1834         }
1835
1836         /* Enable transmission of beacons (AP, IBSS, MESH) */
1837         if ((changed & BSS_CHANGED_BEACON) ||
1838             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1839                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1840                 error = ath_beacon_alloc(aphy, vif);
1841                 if (!error)
1842                         ath_beacon_config(sc, vif);
1843         }
1844
1845         if (changed & BSS_CHANGED_ERP_SLOT) {
1846                 if (bss_conf->use_short_slot)
1847                         slottime = 9;
1848                 else
1849                         slottime = 20;
1850                 if (vif->type == NL80211_IFTYPE_AP) {
1851                         /*
1852                          * Defer update, so that connected stations can adjust
1853                          * their settings at the same time.
1854                          * See beacon.c for more details
1855                          */
1856                         sc->beacon.slottime = slottime;
1857                         sc->beacon.updateslot = UPDATE;
1858                 } else {
1859                         ah->slottime = slottime;
1860                         ath9k_hw_init_global_settings(ah);
1861                 }
1862         }
1863
1864         /* Disable transmission of beacons */
1865         if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1866                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1867
1868         if (changed & BSS_CHANGED_BEACON_INT) {
1869                 sc->beacon_interval = bss_conf->beacon_int;
1870                 /*
1871                  * In case of AP mode, the HW TSF has to be reset
1872                  * when the beacon interval changes.
1873                  */
1874                 if (vif->type == NL80211_IFTYPE_AP) {
1875                         sc->sc_flags |= SC_OP_TSF_RESET;
1876                         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1877                         error = ath_beacon_alloc(aphy, vif);
1878                         if (!error)
1879                                 ath_beacon_config(sc, vif);
1880                 } else {
1881                         ath_beacon_config(sc, vif);
1882                 }
1883         }
1884
1885         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1886                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1887                           bss_conf->use_short_preamble);
1888                 if (bss_conf->use_short_preamble)
1889                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1890                 else
1891                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1892         }
1893
1894         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1895                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1896                           bss_conf->use_cts_prot);
1897                 if (bss_conf->use_cts_prot &&
1898                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1899                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1900                 else
1901                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1902         }
1903
1904         if (changed & BSS_CHANGED_ASSOC) {
1905                 ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
1906                         bss_conf->assoc);
1907                 ath9k_bss_assoc_info(sc, vif, bss_conf);
1908         }
1909
1910         mutex_unlock(&sc->mutex);
1911 }
1912
1913 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1914 {
1915         u64 tsf;
1916         struct ath_wiphy *aphy = hw->priv;
1917         struct ath_softc *sc = aphy->sc;
1918
1919         mutex_lock(&sc->mutex);
1920         tsf = ath9k_hw_gettsf64(sc->sc_ah);
1921         mutex_unlock(&sc->mutex);
1922
1923         return tsf;
1924 }
1925
1926 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
1927 {
1928         struct ath_wiphy *aphy = hw->priv;
1929         struct ath_softc *sc = aphy->sc;
1930
1931         mutex_lock(&sc->mutex);
1932         ath9k_hw_settsf64(sc->sc_ah, tsf);
1933         mutex_unlock(&sc->mutex);
1934 }
1935
1936 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1937 {
1938         struct ath_wiphy *aphy = hw->priv;
1939         struct ath_softc *sc = aphy->sc;
1940
1941         mutex_lock(&sc->mutex);
1942
1943         ath9k_ps_wakeup(sc);
1944         ath9k_hw_reset_tsf(sc->sc_ah);
1945         ath9k_ps_restore(sc);
1946
1947         mutex_unlock(&sc->mutex);
1948 }
1949
1950 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1951                               struct ieee80211_vif *vif,
1952                               enum ieee80211_ampdu_mlme_action action,
1953                               struct ieee80211_sta *sta,
1954                               u16 tid, u16 *ssn)
1955 {
1956         struct ath_wiphy *aphy = hw->priv;
1957         struct ath_softc *sc = aphy->sc;
1958         int ret = 0;
1959
1960         local_bh_disable();
1961
1962         switch (action) {
1963         case IEEE80211_AMPDU_RX_START:
1964                 if (!(sc->sc_flags & SC_OP_RXAGGR))
1965                         ret = -ENOTSUPP;
1966                 break;
1967         case IEEE80211_AMPDU_RX_STOP:
1968                 break;
1969         case IEEE80211_AMPDU_TX_START:
1970                 ath9k_ps_wakeup(sc);
1971                 ath_tx_aggr_start(sc, sta, tid, ssn);
1972                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1973                 ath9k_ps_restore(sc);
1974                 break;
1975         case IEEE80211_AMPDU_TX_STOP:
1976                 ath9k_ps_wakeup(sc);
1977                 ath_tx_aggr_stop(sc, sta, tid);
1978                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1979                 ath9k_ps_restore(sc);
1980                 break;
1981         case IEEE80211_AMPDU_TX_OPERATIONAL:
1982                 ath9k_ps_wakeup(sc);
1983                 ath_tx_aggr_resume(sc, sta, tid);
1984                 ath9k_ps_restore(sc);
1985                 break;
1986         default:
1987                 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
1988                           "Unknown AMPDU action\n");
1989         }
1990
1991         local_bh_enable();
1992
1993         return ret;
1994 }
1995
1996 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1997                              struct survey_info *survey)
1998 {
1999         struct ath_wiphy *aphy = hw->priv;
2000         struct ath_softc *sc = aphy->sc;
2001         struct ath_hw *ah = sc->sc_ah;
2002         struct ath_common *common = ath9k_hw_common(ah);
2003         struct ieee80211_conf *conf = &hw->conf;
2004
2005          if (idx != 0)
2006                 return -ENOENT;
2007
2008         survey->channel = conf->channel;
2009         survey->filled = SURVEY_INFO_NOISE_DBM;
2010         survey->noise = common->ani.noise_floor;
2011
2012         return 0;
2013 }
2014
2015 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2016 {
2017         struct ath_wiphy *aphy = hw->priv;
2018         struct ath_softc *sc = aphy->sc;
2019
2020         mutex_lock(&sc->mutex);
2021         if (ath9k_wiphy_scanning(sc)) {
2022                 /*
2023                  * There is a race here in mac80211 but fixing it requires
2024                  * we revisit how we handle the scan complete callback.
2025                  * After mac80211 fixes we will not have configured hardware
2026                  * to the home channel nor would we have configured the RX
2027                  * filter yet.
2028                  */
2029                 mutex_unlock(&sc->mutex);
2030                 return;
2031         }
2032
2033         aphy->state = ATH_WIPHY_SCAN;
2034         ath9k_wiphy_pause_all_forced(sc, aphy);
2035         sc->sc_flags |= SC_OP_SCANNING;
2036         mutex_unlock(&sc->mutex);
2037 }
2038
2039 /*
2040  * XXX: this requires a revisit after the driver
2041  * scan_complete gets moved to another place/removed in mac80211.
2042  */
2043 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2044 {
2045         struct ath_wiphy *aphy = hw->priv;
2046         struct ath_softc *sc = aphy->sc;
2047
2048         mutex_lock(&sc->mutex);
2049         aphy->state = ATH_WIPHY_ACTIVE;
2050         sc->sc_flags &= ~SC_OP_SCANNING;
2051         mutex_unlock(&sc->mutex);
2052 }
2053
2054 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2055 {
2056         struct ath_wiphy *aphy = hw->priv;
2057         struct ath_softc *sc = aphy->sc;
2058         struct ath_hw *ah = sc->sc_ah;
2059
2060         mutex_lock(&sc->mutex);
2061         ah->coverage_class = coverage_class;
2062         ath9k_hw_init_global_settings(ah);
2063         mutex_unlock(&sc->mutex);
2064 }
2065
2066 struct ieee80211_ops ath9k_ops = {
2067         .tx                 = ath9k_tx,
2068         .start              = ath9k_start,
2069         .stop               = ath9k_stop,
2070         .add_interface      = ath9k_add_interface,
2071         .remove_interface   = ath9k_remove_interface,
2072         .config             = ath9k_config,
2073         .configure_filter   = ath9k_configure_filter,
2074         .sta_add            = ath9k_sta_add,
2075         .sta_remove         = ath9k_sta_remove,
2076         .conf_tx            = ath9k_conf_tx,
2077         .bss_info_changed   = ath9k_bss_info_changed,
2078         .set_key            = ath9k_set_key,
2079         .get_tsf            = ath9k_get_tsf,
2080         .set_tsf            = ath9k_set_tsf,
2081         .reset_tsf          = ath9k_reset_tsf,
2082         .ampdu_action       = ath9k_ampdu_action,
2083         .get_survey         = ath9k_get_survey,
2084         .sw_scan_start      = ath9k_sw_scan_start,
2085         .sw_scan_complete   = ath9k_sw_scan_complete,
2086         .rfkill_poll        = ath9k_rfkill_poll_state,
2087         .set_coverage_class = ath9k_set_coverage_class,
2088 };