2 * Copyright (c) 2008-2009 Atheros Communications Inc.
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.
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.
17 #include <linux/nl80211.h>
21 static void ath_cache_conf_rate(struct ath_softc *sc,
22 struct ieee80211_conf *conf)
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;
33 sc->cur_rate_mode = ATH9K_MODE_11G;
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;
43 sc->cur_rate_mode = ATH9K_MODE_11A;
51 static void ath_update_txpow(struct ath_softc *sc)
53 struct ath_hw *ah = sc->sc_ah;
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;
62 static u8 parse_mpdudensity(u8 mpdudensity)
65 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
66 * 0 for no restriction
75 switch (mpdudensity) {
81 /* Our lower layer calculations limit our precision to
97 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
98 struct ieee80211_hw *hw)
100 struct ieee80211_channel *curchan = hw->conf.channel;
101 struct ath9k_channel *channel;
104 chan_idx = curchan->hw_value;
105 channel = &sc->sc_ah->channels[chan_idx];
106 ath9k_update_ichannel(sc, hw, channel);
110 bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
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);
122 void ath9k_ps_wakeup(struct ath_softc *sc)
124 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
127 spin_lock_irqsave(&sc->sc_pm_lock, flags);
128 if (++sc->ps_usecount != 1)
131 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
134 * While the hardware is asleep, the cycle counters contain no
135 * useful data. Better clear them now so that they don't mess up
136 * survey data results.
138 spin_lock(&common->cc_lock);
139 ath_hw_cycle_counters_update(common);
140 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
141 spin_unlock(&common->cc_lock);
144 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
147 void ath9k_ps_restore(struct ath_softc *sc)
149 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
152 spin_lock_irqsave(&sc->sc_pm_lock, flags);
153 if (--sc->ps_usecount != 0)
156 spin_lock(&common->cc_lock);
157 ath_hw_cycle_counters_update(common);
158 spin_unlock(&common->cc_lock);
161 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
162 else if (sc->ps_enabled &&
163 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
165 PS_WAIT_FOR_PSPOLL_DATA |
166 PS_WAIT_FOR_TX_ACK)))
167 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
170 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
173 static void ath_start_ani(struct ath_common *common)
175 struct ath_hw *ah = common->ah;
176 unsigned long timestamp = jiffies_to_msecs(jiffies);
177 struct ath_softc *sc = (struct ath_softc *) common->priv;
179 if (!(sc->sc_flags & SC_OP_ANI_RUN))
182 if (sc->sc_flags & SC_OP_OFFCHANNEL)
185 common->ani.longcal_timer = timestamp;
186 common->ani.shortcal_timer = timestamp;
187 common->ani.checkani_timer = timestamp;
189 mod_timer(&common->ani.timer,
191 msecs_to_jiffies((u32)ah->config.ani_poll_interval));
194 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
196 struct ath_hw *ah = sc->sc_ah;
197 struct ath9k_channel *chan = &ah->channels[channel];
198 struct survey_info *survey = &sc->survey[channel];
200 if (chan->noisefloor) {
201 survey->filled |= SURVEY_INFO_NOISE_DBM;
202 survey->noise = chan->noisefloor;
206 static void ath_update_survey_stats(struct ath_softc *sc)
208 struct ath_hw *ah = sc->sc_ah;
209 struct ath_common *common = ath9k_hw_common(ah);
210 int pos = ah->curchan - &ah->channels[0];
211 struct survey_info *survey = &sc->survey[pos];
212 struct ath_cycle_counters *cc = &common->cc_survey;
213 unsigned int div = common->clockrate * 1000;
215 if (ah->power_mode == ATH9K_PM_AWAKE)
216 ath_hw_cycle_counters_update(common);
218 if (cc->cycles > 0) {
219 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
220 SURVEY_INFO_CHANNEL_TIME_BUSY |
221 SURVEY_INFO_CHANNEL_TIME_RX |
222 SURVEY_INFO_CHANNEL_TIME_TX;
223 survey->channel_time += cc->cycles / div;
224 survey->channel_time_busy += cc->rx_busy / div;
225 survey->channel_time_rx += cc->rx_frame / div;
226 survey->channel_time_tx += cc->tx_frame / div;
228 memset(cc, 0, sizeof(*cc));
230 ath_update_survey_nf(sc, pos);
234 * Set/change channels. If the channel is really being changed, it's done
235 * by reseting the chip. To accomplish this we must first cleanup any pending
236 * DMA, then restart stuff.
238 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
239 struct ath9k_channel *hchan)
241 struct ath_wiphy *aphy = hw->priv;
242 struct ath_hw *ah = sc->sc_ah;
243 struct ath_common *common = ath9k_hw_common(ah);
244 struct ieee80211_conf *conf = &common->hw->conf;
245 bool fastcc = true, stopped;
246 struct ieee80211_channel *channel = hw->conf.channel;
247 struct ath9k_hw_cal_data *caldata = NULL;
250 if (sc->sc_flags & SC_OP_INVALID)
253 del_timer_sync(&common->ani.timer);
254 cancel_work_sync(&sc->paprd_work);
255 cancel_work_sync(&sc->hw_check_work);
256 cancel_delayed_work_sync(&sc->tx_complete_work);
261 * This is only performed if the channel settings have
264 * To switch channels clear any pending DMA operations;
265 * wait long enough for the RX fifo to drain, reset the
266 * hardware at the new frequency, and then re-enable
267 * the relevant bits of the h/w.
269 ath9k_hw_set_interrupts(ah, 0);
270 ath_drain_all_txq(sc, false);
271 stopped = ath_stoprecv(sc);
273 /* XXX: do not flush receive queue here. We don't want
274 * to flush data frames already in queue because of
275 * changing channel. */
277 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
280 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
281 caldata = &aphy->caldata;
283 ath_print(common, ATH_DBG_CONFIG,
284 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
285 sc->sc_ah->curchan->channel,
286 channel->center_freq, conf_is_ht40(conf),
289 spin_lock_bh(&sc->sc_resetlock);
291 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
293 ath_print(common, ATH_DBG_FATAL,
294 "Unable to reset channel (%u MHz), "
296 channel->center_freq, r);
297 spin_unlock_bh(&sc->sc_resetlock);
300 spin_unlock_bh(&sc->sc_resetlock);
302 if (ath_startrecv(sc) != 0) {
303 ath_print(common, ATH_DBG_FATAL,
304 "Unable to restart recv logic\n");
309 ath_cache_conf_rate(sc, &hw->conf);
310 ath_update_txpow(sc);
311 ath9k_hw_set_interrupts(ah, ah->imask);
313 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
314 ath_beacon_config(sc, NULL);
315 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
316 ath_start_ani(common);
320 ath9k_ps_restore(sc);
324 static void ath_paprd_activate(struct ath_softc *sc)
326 struct ath_hw *ah = sc->sc_ah;
327 struct ath9k_hw_cal_data *caldata = ah->caldata;
328 struct ath_common *common = ath9k_hw_common(ah);
331 if (!caldata || !caldata->paprd_done)
335 ar9003_paprd_enable(ah, false);
336 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
337 if (!(common->tx_chainmask & BIT(chain)))
340 ar9003_paprd_populate_single_table(ah, caldata, chain);
343 ar9003_paprd_enable(ah, true);
344 ath9k_ps_restore(sc);
347 void ath_paprd_calibrate(struct work_struct *work)
349 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
350 struct ieee80211_hw *hw = sc->hw;
351 struct ath_hw *ah = sc->sc_ah;
352 struct ieee80211_hdr *hdr;
353 struct sk_buff *skb = NULL;
354 struct ieee80211_tx_info *tx_info;
355 int band = hw->conf.channel->band;
356 struct ieee80211_supported_band *sband = &sc->sbands[band];
357 struct ath_tx_control txctl;
358 struct ath9k_hw_cal_data *caldata = ah->caldata;
359 struct ath_common *common = ath9k_hw_common(ah);
370 skb = alloc_skb(len, GFP_KERNEL);
374 tx_info = IEEE80211_SKB_CB(skb);
377 memset(skb->data, 0, len);
378 hdr = (struct ieee80211_hdr *)skb->data;
379 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
380 hdr->frame_control = cpu_to_le16(ftype);
381 hdr->duration_id = cpu_to_le16(10);
382 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
383 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
384 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
386 memset(&txctl, 0, sizeof(txctl));
387 qnum = sc->tx.hwq_map[WME_AC_BE];
388 txctl.txq = &sc->tx.txq[qnum];
391 ar9003_paprd_init_table(ah);
392 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
393 if (!(common->tx_chainmask & BIT(chain)))
397 memset(tx_info, 0, sizeof(*tx_info));
398 tx_info->band = band;
400 for (i = 0; i < 4; i++) {
401 tx_info->control.rates[i].idx = sband->n_bitrates - 1;
402 tx_info->control.rates[i].count = 6;
405 init_completion(&sc->paprd_complete);
406 ar9003_paprd_setup_gain_table(ah, chain);
407 txctl.paprd = BIT(chain);
408 if (ath_tx_start(hw, skb, &txctl) != 0)
411 time_left = wait_for_completion_timeout(&sc->paprd_complete,
412 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
414 ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
415 "Timeout waiting for paprd training on "
421 if (!ar9003_paprd_is_done(ah))
424 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
432 caldata->paprd_done = true;
433 ath_paprd_activate(sc);
437 ath9k_ps_restore(sc);
441 * This routine performs the periodic noise floor calibration function
442 * that is used to adjust and optimize the chip performance. This
443 * takes environmental changes (location, temperature) into account.
444 * When the task is complete, it reschedules itself depending on the
445 * appropriate interval that was calculated.
447 void ath_ani_calibrate(unsigned long data)
449 struct ath_softc *sc = (struct ath_softc *)data;
450 struct ath_hw *ah = sc->sc_ah;
451 struct ath_common *common = ath9k_hw_common(ah);
452 bool longcal = false;
453 bool shortcal = false;
454 bool aniflag = false;
455 unsigned int timestamp = jiffies_to_msecs(jiffies);
456 u32 cal_interval, short_cal_interval, long_cal_interval;
459 if (ah->caldata && ah->caldata->nfcal_interference)
460 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
462 long_cal_interval = ATH_LONG_CALINTERVAL;
464 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
465 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
467 /* Only calibrate if awake */
468 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
473 /* Long calibration runs independently of short calibration. */
474 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
476 ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
477 common->ani.longcal_timer = timestamp;
480 /* Short calibration applies only while caldone is false */
481 if (!common->ani.caldone) {
482 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
484 ath_print(common, ATH_DBG_ANI,
485 "shortcal @%lu\n", jiffies);
486 common->ani.shortcal_timer = timestamp;
487 common->ani.resetcal_timer = timestamp;
490 if ((timestamp - common->ani.resetcal_timer) >=
491 ATH_RESTART_CALINTERVAL) {
492 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
493 if (common->ani.caldone)
494 common->ani.resetcal_timer = timestamp;
498 /* Verify whether we must check ANI */
499 if ((timestamp - common->ani.checkani_timer) >=
500 ah->config.ani_poll_interval) {
502 common->ani.checkani_timer = timestamp;
505 /* Skip all processing if there's nothing to do. */
506 if (longcal || shortcal || aniflag) {
507 /* Call ANI routine if necessary */
509 spin_lock_irqsave(&common->cc_lock, flags);
510 ath9k_hw_ani_monitor(ah, ah->curchan);
511 ath_update_survey_stats(sc);
512 spin_unlock_irqrestore(&common->cc_lock, flags);
515 /* Perform calibration if necessary */
516 if (longcal || shortcal) {
517 common->ani.caldone =
518 ath9k_hw_calibrate(ah,
520 common->rx_chainmask,
525 ath9k_ps_restore(sc);
529 * Set timer interval based on previous results.
530 * The interval must be the shortest necessary to satisfy ANI,
531 * short calibration and long calibration.
533 cal_interval = ATH_LONG_CALINTERVAL;
534 if (sc->sc_ah->config.enable_ani)
535 cal_interval = min(cal_interval,
536 (u32)ah->config.ani_poll_interval);
537 if (!common->ani.caldone)
538 cal_interval = min(cal_interval, (u32)short_cal_interval);
540 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
541 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
542 if (!ah->caldata->paprd_done)
543 ieee80211_queue_work(sc->hw, &sc->paprd_work);
545 ath_paprd_activate(sc);
550 * Update tx/rx chainmask. For legacy association,
551 * hard code chainmask to 1x1, for 11n association, use
552 * the chainmask configuration, for bt coexistence, use
553 * the chainmask configuration even in legacy mode.
555 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
557 struct ath_hw *ah = sc->sc_ah;
558 struct ath_common *common = ath9k_hw_common(ah);
560 if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
561 (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
562 common->tx_chainmask = ah->caps.tx_chainmask;
563 common->rx_chainmask = ah->caps.rx_chainmask;
565 common->tx_chainmask = 1;
566 common->rx_chainmask = 1;
569 ath_print(common, ATH_DBG_CONFIG,
570 "tx chmask: %d, rx chmask: %d\n",
571 common->tx_chainmask,
572 common->rx_chainmask);
575 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
579 an = (struct ath_node *)sta->drv_priv;
581 if (sc->sc_flags & SC_OP_TXAGGR) {
582 ath_tx_node_init(sc, an);
583 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
584 sta->ht_cap.ampdu_factor);
585 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
586 an->last_rssi = ATH_RSSI_DUMMY_MARKER;
590 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
592 struct ath_node *an = (struct ath_node *)sta->drv_priv;
594 if (sc->sc_flags & SC_OP_TXAGGR)
595 ath_tx_node_cleanup(sc, an);
598 void ath_hw_check(struct work_struct *work)
600 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
605 for (i = 0; i < 3; i++) {
606 if (ath9k_hw_check_alive(sc->sc_ah))
611 ath_reset(sc, false);
614 ath9k_ps_restore(sc);
617 void ath9k_tasklet(unsigned long data)
619 struct ath_softc *sc = (struct ath_softc *)data;
620 struct ath_hw *ah = sc->sc_ah;
621 struct ath_common *common = ath9k_hw_common(ah);
623 u32 status = sc->intrstatus;
628 if (status & ATH9K_INT_FATAL) {
629 ath_reset(sc, false);
630 ath9k_ps_restore(sc);
634 if (!ath9k_hw_check_alive(ah))
635 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
637 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
638 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
641 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
643 if (status & rxmask) {
644 spin_lock_bh(&sc->rx.rxflushlock);
646 /* Check for high priority Rx first */
647 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
648 (status & ATH9K_INT_RXHP))
649 ath_rx_tasklet(sc, 0, true);
651 ath_rx_tasklet(sc, 0, false);
652 spin_unlock_bh(&sc->rx.rxflushlock);
655 if (status & ATH9K_INT_TX) {
656 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
657 ath_tx_edma_tasklet(sc);
662 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
664 * TSF sync does not look correct; remain awake to sync with
667 ath_print(common, ATH_DBG_PS,
668 "TSFOOR - Sync with next Beacon\n");
669 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
672 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
673 if (status & ATH9K_INT_GENTIMER)
674 ath_gen_timer_isr(sc->sc_ah);
676 /* re-enable hardware interrupt */
677 ath9k_hw_set_interrupts(ah, ah->imask);
678 ath9k_ps_restore(sc);
681 irqreturn_t ath_isr(int irq, void *dev)
683 #define SCHED_INTR ( \
696 struct ath_softc *sc = dev;
697 struct ath_hw *ah = sc->sc_ah;
698 struct ath_common *common = ath9k_hw_common(ah);
699 enum ath9k_int status;
703 * The hardware is not ready/present, don't
704 * touch anything. Note this can happen early
705 * on if the IRQ is shared.
707 if (sc->sc_flags & SC_OP_INVALID)
711 /* shared irq, not for us */
713 if (!ath9k_hw_intrpend(ah))
717 * Figure out the reason(s) for the interrupt. Note
718 * that the hal returns a pseudo-ISR that may include
719 * bits we haven't explicitly enabled so we mask the
720 * value to insure we only process bits we requested.
722 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
723 status &= ah->imask; /* discard unasked-for bits */
726 * If there are no status bits set, then this interrupt was not
727 * for me (should have been caught above).
732 /* Cache the status */
733 sc->intrstatus = status;
735 if (status & SCHED_INTR)
739 * If a FATAL or RXORN interrupt is received, we have to reset the
742 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
743 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
746 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
747 (status & ATH9K_INT_BB_WATCHDOG)) {
749 spin_lock(&common->cc_lock);
750 ath_hw_cycle_counters_update(common);
751 ar9003_hw_bb_watchdog_dbg_info(ah);
752 spin_unlock(&common->cc_lock);
757 if (status & ATH9K_INT_SWBA)
758 tasklet_schedule(&sc->bcon_tasklet);
760 if (status & ATH9K_INT_TXURN)
761 ath9k_hw_updatetxtriglevel(ah, true);
763 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
764 if (status & ATH9K_INT_RXEOL) {
765 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
766 ath9k_hw_set_interrupts(ah, ah->imask);
770 if (status & ATH9K_INT_MIB) {
772 * Disable interrupts until we service the MIB
773 * interrupt; otherwise it will continue to
776 ath9k_hw_set_interrupts(ah, 0);
778 * Let the hal handle the event. We assume
779 * it will clear whatever condition caused
782 spin_lock(&common->cc_lock);
783 ath9k_hw_proc_mib_event(ah);
784 spin_unlock(&common->cc_lock);
785 ath9k_hw_set_interrupts(ah, ah->imask);
788 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
789 if (status & ATH9K_INT_TIM_TIMER) {
790 /* Clear RxAbort bit so that we can
792 ath9k_setpower(sc, ATH9K_PM_AWAKE);
793 ath9k_hw_setrxabort(sc->sc_ah, 0);
794 sc->ps_flags |= PS_WAIT_FOR_BEACON;
799 ath_debug_stat_interrupt(sc, status);
802 /* turn off every interrupt except SWBA */
803 ath9k_hw_set_interrupts(ah, (ah->imask & ATH9K_INT_SWBA));
804 tasklet_schedule(&sc->intr_tq);
812 static u32 ath_get_extchanmode(struct ath_softc *sc,
813 struct ieee80211_channel *chan,
814 enum nl80211_channel_type channel_type)
818 switch (chan->band) {
819 case IEEE80211_BAND_2GHZ:
820 switch(channel_type) {
821 case NL80211_CHAN_NO_HT:
822 case NL80211_CHAN_HT20:
823 chanmode = CHANNEL_G_HT20;
825 case NL80211_CHAN_HT40PLUS:
826 chanmode = CHANNEL_G_HT40PLUS;
828 case NL80211_CHAN_HT40MINUS:
829 chanmode = CHANNEL_G_HT40MINUS;
833 case IEEE80211_BAND_5GHZ:
834 switch(channel_type) {
835 case NL80211_CHAN_NO_HT:
836 case NL80211_CHAN_HT20:
837 chanmode = CHANNEL_A_HT20;
839 case NL80211_CHAN_HT40PLUS:
840 chanmode = CHANNEL_A_HT40PLUS;
842 case NL80211_CHAN_HT40MINUS:
843 chanmode = CHANNEL_A_HT40MINUS;
854 static void ath9k_bss_assoc_info(struct ath_softc *sc,
855 struct ieee80211_vif *vif,
856 struct ieee80211_bss_conf *bss_conf)
858 struct ath_hw *ah = sc->sc_ah;
859 struct ath_common *common = ath9k_hw_common(ah);
861 if (bss_conf->assoc) {
862 ath_print(common, ATH_DBG_CONFIG,
863 "Bss Info ASSOC %d, bssid: %pM\n",
864 bss_conf->aid, common->curbssid);
866 /* New association, store aid */
867 common->curaid = bss_conf->aid;
868 ath9k_hw_write_associd(ah);
871 * Request a re-configuration of Beacon related timers
872 * on the receipt of the first Beacon frame (i.e.,
873 * after time sync with the AP).
875 sc->ps_flags |= PS_BEACON_SYNC;
877 /* Configure the beacon */
878 ath_beacon_config(sc, vif);
880 /* Reset rssi stats */
881 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
883 sc->sc_flags |= SC_OP_ANI_RUN;
884 ath_start_ani(common);
886 ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
889 sc->sc_flags &= ~SC_OP_ANI_RUN;
890 del_timer_sync(&common->ani.timer);
894 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
896 struct ath_hw *ah = sc->sc_ah;
897 struct ath_common *common = ath9k_hw_common(ah);
898 struct ieee80211_channel *channel = hw->conf.channel;
902 ath9k_hw_configpcipowersave(ah, 0, 0);
905 ah->curchan = ath_get_curchannel(sc, sc->hw);
907 spin_lock_bh(&sc->sc_resetlock);
908 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
910 ath_print(common, ATH_DBG_FATAL,
911 "Unable to reset channel (%u MHz), "
913 channel->center_freq, r);
915 spin_unlock_bh(&sc->sc_resetlock);
917 ath_update_txpow(sc);
918 if (ath_startrecv(sc) != 0) {
919 ath_print(common, ATH_DBG_FATAL,
920 "Unable to restart recv logic\n");
924 if (sc->sc_flags & SC_OP_BEACONS)
925 ath_beacon_config(sc, NULL); /* restart beacons */
927 /* Re-Enable interrupts */
928 ath9k_hw_set_interrupts(ah, ah->imask);
931 ath9k_hw_cfg_output(ah, ah->led_pin,
932 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
933 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
935 ieee80211_wake_queues(hw);
936 ath9k_ps_restore(sc);
939 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
941 struct ath_hw *ah = sc->sc_ah;
942 struct ieee80211_channel *channel = hw->conf.channel;
946 ieee80211_stop_queues(hw);
949 * Keep the LED on when the radio is disabled
950 * during idle unassociated state.
953 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
954 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
957 /* Disable interrupts */
958 ath9k_hw_set_interrupts(ah, 0);
960 ath_drain_all_txq(sc, false); /* clear pending tx frames */
961 ath_stoprecv(sc); /* turn off frame recv */
962 ath_flushrecv(sc); /* flush recv queue */
965 ah->curchan = ath_get_curchannel(sc, hw);
967 spin_lock_bh(&sc->sc_resetlock);
968 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
970 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
971 "Unable to reset channel (%u MHz), "
973 channel->center_freq, r);
975 spin_unlock_bh(&sc->sc_resetlock);
977 ath9k_hw_phy_disable(ah);
978 ath9k_hw_configpcipowersave(ah, 1, 1);
979 ath9k_ps_restore(sc);
980 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
983 int ath_reset(struct ath_softc *sc, bool retry_tx)
985 struct ath_hw *ah = sc->sc_ah;
986 struct ath_common *common = ath9k_hw_common(ah);
987 struct ieee80211_hw *hw = sc->hw;
991 del_timer_sync(&common->ani.timer);
993 ieee80211_stop_queues(hw);
995 ath9k_hw_set_interrupts(ah, 0);
996 ath_drain_all_txq(sc, retry_tx);
1000 spin_lock_bh(&sc->sc_resetlock);
1001 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
1003 ath_print(common, ATH_DBG_FATAL,
1004 "Unable to reset hardware; reset status %d\n", r);
1005 spin_unlock_bh(&sc->sc_resetlock);
1007 if (ath_startrecv(sc) != 0)
1008 ath_print(common, ATH_DBG_FATAL,
1009 "Unable to start recv logic\n");
1012 * We may be doing a reset in response to a request
1013 * that changes the channel so update any state that
1014 * might change as a result.
1016 ath_cache_conf_rate(sc, &hw->conf);
1018 ath_update_txpow(sc);
1020 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
1021 ath_beacon_config(sc, NULL); /* restart beacons */
1023 ath9k_hw_set_interrupts(ah, ah->imask);
1027 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1028 if (ATH_TXQ_SETUP(sc, i)) {
1029 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1030 ath_txq_schedule(sc, &sc->tx.txq[i]);
1031 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1036 ieee80211_wake_queues(hw);
1039 ath_start_ani(common);
1044 static int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
1050 qnum = sc->tx.hwq_map[WME_AC_VO];
1053 qnum = sc->tx.hwq_map[WME_AC_VI];
1056 qnum = sc->tx.hwq_map[WME_AC_BE];
1059 qnum = sc->tx.hwq_map[WME_AC_BK];
1062 qnum = sc->tx.hwq_map[WME_AC_BE];
1069 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
1094 /* XXX: Remove me once we don't depend on ath9k_channel for all
1095 * this redundant data */
1096 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1097 struct ath9k_channel *ichan)
1099 struct ieee80211_channel *chan = hw->conf.channel;
1100 struct ieee80211_conf *conf = &hw->conf;
1102 ichan->channel = chan->center_freq;
1105 if (chan->band == IEEE80211_BAND_2GHZ) {
1106 ichan->chanmode = CHANNEL_G;
1107 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1109 ichan->chanmode = CHANNEL_A;
1110 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1113 if (conf_is_ht(conf))
1114 ichan->chanmode = ath_get_extchanmode(sc, chan,
1115 conf->channel_type);
1118 /**********************/
1119 /* mac80211 callbacks */
1120 /**********************/
1122 static int ath9k_start(struct ieee80211_hw *hw)
1124 struct ath_wiphy *aphy = hw->priv;
1125 struct ath_softc *sc = aphy->sc;
1126 struct ath_hw *ah = sc->sc_ah;
1127 struct ath_common *common = ath9k_hw_common(ah);
1128 struct ieee80211_channel *curchan = hw->conf.channel;
1129 struct ath9k_channel *init_channel;
1132 ath_print(common, ATH_DBG_CONFIG,
1133 "Starting driver with initial channel: %d MHz\n",
1134 curchan->center_freq);
1136 mutex_lock(&sc->mutex);
1138 if (ath9k_wiphy_started(sc)) {
1139 if (sc->chan_idx == curchan->hw_value) {
1141 * Already on the operational channel, the new wiphy
1142 * can be marked active.
1144 aphy->state = ATH_WIPHY_ACTIVE;
1145 ieee80211_wake_queues(hw);
1148 * Another wiphy is on another channel, start the new
1149 * wiphy in paused state.
1151 aphy->state = ATH_WIPHY_PAUSED;
1152 ieee80211_stop_queues(hw);
1154 mutex_unlock(&sc->mutex);
1157 aphy->state = ATH_WIPHY_ACTIVE;
1159 /* setup initial channel */
1161 sc->chan_idx = curchan->hw_value;
1163 init_channel = ath_get_curchannel(sc, hw);
1165 /* Reset SERDES registers */
1166 ath9k_hw_configpcipowersave(ah, 0, 0);
1169 * The basic interface to setting the hardware in a good
1170 * state is ``reset''. On return the hardware is known to
1171 * be powered up and with interrupts disabled. This must
1172 * be followed by initialization of the appropriate bits
1173 * and then setup of the interrupt mask.
1175 spin_lock_bh(&sc->sc_resetlock);
1176 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1178 ath_print(common, ATH_DBG_FATAL,
1179 "Unable to reset hardware; reset status %d "
1180 "(freq %u MHz)\n", r,
1181 curchan->center_freq);
1182 spin_unlock_bh(&sc->sc_resetlock);
1185 spin_unlock_bh(&sc->sc_resetlock);
1188 * This is needed only to setup initial state
1189 * but it's best done after a reset.
1191 ath_update_txpow(sc);
1194 * Setup the hardware after reset:
1195 * The receive engine is set going.
1196 * Frame transmit is handled entirely
1197 * in the frame output path; there's nothing to do
1198 * here except setup the interrupt mask.
1200 if (ath_startrecv(sc) != 0) {
1201 ath_print(common, ATH_DBG_FATAL,
1202 "Unable to start recv logic\n");
1207 /* Setup our intr mask. */
1208 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1209 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1212 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1213 ah->imask |= ATH9K_INT_RXHP |
1215 ATH9K_INT_BB_WATCHDOG;
1217 ah->imask |= ATH9K_INT_RX;
1219 ah->imask |= ATH9K_INT_GTT;
1221 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1222 ah->imask |= ATH9K_INT_CST;
1224 ath_cache_conf_rate(sc, &hw->conf);
1226 sc->sc_flags &= ~SC_OP_INVALID;
1228 /* Disable BMISS interrupt when we're not associated */
1229 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1230 ath9k_hw_set_interrupts(ah, ah->imask);
1232 ieee80211_wake_queues(hw);
1234 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1236 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1237 !ah->btcoex_hw.enabled) {
1238 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1239 AR_STOMP_LOW_WLAN_WGHT);
1240 ath9k_hw_btcoex_enable(ah);
1242 if (common->bus_ops->bt_coex_prep)
1243 common->bus_ops->bt_coex_prep(common);
1244 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1245 ath9k_btcoex_timer_resume(sc);
1249 mutex_unlock(&sc->mutex);
1254 static int ath9k_tx(struct ieee80211_hw *hw,
1255 struct sk_buff *skb)
1257 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1258 struct ath_wiphy *aphy = hw->priv;
1259 struct ath_softc *sc = aphy->sc;
1260 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1261 struct ath_tx_control txctl;
1262 int padpos, padsize;
1263 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1266 if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1267 ath_print(common, ATH_DBG_XMIT,
1268 "ath9k: %s: TX in unexpected wiphy state "
1269 "%d\n", wiphy_name(hw->wiphy), aphy->state);
1273 if (sc->ps_enabled) {
1275 * mac80211 does not set PM field for normal data frames, so we
1276 * need to update that based on the current PS mode.
1278 if (ieee80211_is_data(hdr->frame_control) &&
1279 !ieee80211_is_nullfunc(hdr->frame_control) &&
1280 !ieee80211_has_pm(hdr->frame_control)) {
1281 ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
1282 "while in PS mode\n");
1283 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1287 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1289 * We are using PS-Poll and mac80211 can request TX while in
1290 * power save mode. Need to wake up hardware for the TX to be
1291 * completed and if needed, also for RX of buffered frames.
1293 ath9k_ps_wakeup(sc);
1294 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1295 ath9k_hw_setrxabort(sc->sc_ah, 0);
1296 if (ieee80211_is_pspoll(hdr->frame_control)) {
1297 ath_print(common, ATH_DBG_PS,
1298 "Sending PS-Poll to pick a buffered frame\n");
1299 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1301 ath_print(common, ATH_DBG_PS,
1302 "Wake up to complete TX\n");
1303 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1306 * The actual restore operation will happen only after
1307 * the sc_flags bit is cleared. We are just dropping
1308 * the ps_usecount here.
1310 ath9k_ps_restore(sc);
1313 memset(&txctl, 0, sizeof(struct ath_tx_control));
1316 * As a temporary workaround, assign seq# here; this will likely need
1317 * to be cleaned up to work better with Beacon transmission and virtual
1320 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1321 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1322 sc->tx.seq_no += 0x10;
1323 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1324 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
1327 /* Add the padding after the header if this is not already done */
1328 padpos = ath9k_cmn_padpos(hdr->frame_control);
1329 padsize = padpos & 3;
1330 if (padsize && skb->len>padpos) {
1331 if (skb_headroom(skb) < padsize)
1333 skb_push(skb, padsize);
1334 memmove(skb->data, skb->data + padsize, padpos);
1337 qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
1338 txctl.txq = &sc->tx.txq[qnum];
1340 ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1342 if (ath_tx_start(hw, skb, &txctl) != 0) {
1343 ath_print(common, ATH_DBG_XMIT, "TX failed\n");
1349 dev_kfree_skb_any(skb);
1353 static void ath9k_stop(struct ieee80211_hw *hw)
1355 struct ath_wiphy *aphy = hw->priv;
1356 struct ath_softc *sc = aphy->sc;
1357 struct ath_hw *ah = sc->sc_ah;
1358 struct ath_common *common = ath9k_hw_common(ah);
1361 mutex_lock(&sc->mutex);
1363 aphy->state = ATH_WIPHY_INACTIVE;
1366 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1368 cancel_delayed_work_sync(&sc->tx_complete_work);
1369 cancel_work_sync(&sc->paprd_work);
1370 cancel_work_sync(&sc->hw_check_work);
1372 for (i = 0; i < sc->num_sec_wiphy; i++) {
1373 if (sc->sec_wiphy[i])
1377 if (i == sc->num_sec_wiphy) {
1378 cancel_delayed_work_sync(&sc->wiphy_work);
1379 cancel_work_sync(&sc->chan_work);
1382 if (sc->sc_flags & SC_OP_INVALID) {
1383 ath_print(common, ATH_DBG_ANY, "Device not present\n");
1384 mutex_unlock(&sc->mutex);
1388 if (ath9k_wiphy_started(sc)) {
1389 mutex_unlock(&sc->mutex);
1390 return; /* another wiphy still in use */
1393 /* Ensure HW is awake when we try to shut it down. */
1394 ath9k_ps_wakeup(sc);
1396 if (ah->btcoex_hw.enabled) {
1397 ath9k_hw_btcoex_disable(ah);
1398 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1399 ath9k_btcoex_timer_pause(sc);
1402 /* make sure h/w will not generate any interrupt
1403 * before setting the invalid flag. */
1404 ath9k_hw_set_interrupts(ah, 0);
1406 if (!(sc->sc_flags & SC_OP_INVALID)) {
1407 ath_drain_all_txq(sc, false);
1409 ath9k_hw_phy_disable(ah);
1411 sc->rx.rxlink = NULL;
1413 /* disable HAL and put h/w to sleep */
1414 ath9k_hw_disable(ah);
1415 ath9k_hw_configpcipowersave(ah, 1, 1);
1416 ath9k_ps_restore(sc);
1418 /* Finally, put the chip in FULL SLEEP mode */
1419 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
1421 sc->sc_flags |= SC_OP_INVALID;
1423 mutex_unlock(&sc->mutex);
1425 ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
1428 static int ath9k_add_interface(struct ieee80211_hw *hw,
1429 struct ieee80211_vif *vif)
1431 struct ath_wiphy *aphy = hw->priv;
1432 struct ath_softc *sc = aphy->sc;
1433 struct ath_hw *ah = sc->sc_ah;
1434 struct ath_common *common = ath9k_hw_common(ah);
1435 struct ath_vif *avp = (void *)vif->drv_priv;
1436 enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1439 mutex_lock(&sc->mutex);
1441 switch (vif->type) {
1442 case NL80211_IFTYPE_STATION:
1443 ic_opmode = NL80211_IFTYPE_STATION;
1445 case NL80211_IFTYPE_WDS:
1446 ic_opmode = NL80211_IFTYPE_WDS;
1448 case NL80211_IFTYPE_ADHOC:
1449 case NL80211_IFTYPE_AP:
1450 case NL80211_IFTYPE_MESH_POINT:
1451 if (sc->nbcnvifs >= ATH_BCBUF) {
1455 ic_opmode = vif->type;
1458 ath_print(common, ATH_DBG_FATAL,
1459 "Interface type %d not yet supported\n", vif->type);
1464 ath_print(common, ATH_DBG_CONFIG,
1465 "Attach a VIF of type: %d\n", ic_opmode);
1467 /* Set the VIF opmode */
1468 avp->av_opmode = ic_opmode;
1473 ath9k_set_bssid_mask(hw, vif);
1476 goto out; /* skip global settings for secondary vif */
1478 if (ic_opmode == NL80211_IFTYPE_AP) {
1479 ath9k_hw_set_tsfadjust(ah, 1);
1480 sc->sc_flags |= SC_OP_TSF_RESET;
1483 /* Set the device opmode */
1484 ah->opmode = ic_opmode;
1487 * Enable MIB interrupts when there are hardware phy counters.
1488 * Note we only do this (at the moment) for station mode.
1490 if ((vif->type == NL80211_IFTYPE_STATION) ||
1491 (vif->type == NL80211_IFTYPE_ADHOC) ||
1492 (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1493 if (ah->config.enable_ani)
1494 ah->imask |= ATH9K_INT_MIB;
1495 ah->imask |= ATH9K_INT_TSFOOR;
1498 ath9k_hw_set_interrupts(ah, ah->imask);
1500 if (vif->type == NL80211_IFTYPE_AP ||
1501 vif->type == NL80211_IFTYPE_ADHOC ||
1502 vif->type == NL80211_IFTYPE_MONITOR) {
1503 sc->sc_flags |= SC_OP_ANI_RUN;
1504 ath_start_ani(common);
1508 mutex_unlock(&sc->mutex);
1512 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1513 struct ieee80211_vif *vif)
1515 struct ath_wiphy *aphy = hw->priv;
1516 struct ath_softc *sc = aphy->sc;
1517 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1518 struct ath_vif *avp = (void *)vif->drv_priv;
1521 ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
1523 mutex_lock(&sc->mutex);
1526 sc->sc_flags &= ~SC_OP_ANI_RUN;
1527 del_timer_sync(&common->ani.timer);
1529 /* Reclaim beacon resources */
1530 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1531 (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1532 (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
1533 ath9k_ps_wakeup(sc);
1534 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1535 ath9k_ps_restore(sc);
1538 ath_beacon_return(sc, avp);
1539 sc->sc_flags &= ~SC_OP_BEACONS;
1541 for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
1542 if (sc->beacon.bslot[i] == vif) {
1543 printk(KERN_DEBUG "%s: vif had allocated beacon "
1544 "slot\n", __func__);
1545 sc->beacon.bslot[i] = NULL;
1546 sc->beacon.bslot_aphy[i] = NULL;
1552 mutex_unlock(&sc->mutex);
1555 static void ath9k_enable_ps(struct ath_softc *sc)
1557 struct ath_hw *ah = sc->sc_ah;
1559 sc->ps_enabled = true;
1560 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1561 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1562 ah->imask |= ATH9K_INT_TIM_TIMER;
1563 ath9k_hw_set_interrupts(ah, ah->imask);
1565 ath9k_hw_setrxabort(ah, 1);
1569 static void ath9k_disable_ps(struct ath_softc *sc)
1571 struct ath_hw *ah = sc->sc_ah;
1573 sc->ps_enabled = false;
1574 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1575 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1576 ath9k_hw_setrxabort(ah, 0);
1577 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
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(ah, ah->imask);
1589 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1591 struct ath_wiphy *aphy = hw->priv;
1592 struct ath_softc *sc = aphy->sc;
1593 struct ath_hw *ah = sc->sc_ah;
1594 struct ath_common *common = ath9k_hw_common(ah);
1595 struct ieee80211_conf *conf = &hw->conf;
1598 mutex_lock(&sc->mutex);
1601 * Leave this as the first check because we need to turn on the
1602 * radio if it was disabled before prior to processing the rest
1603 * of the changes. Likewise we must only disable the radio towards
1606 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1608 bool all_wiphys_idle;
1609 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1611 spin_lock_bh(&sc->wiphy_lock);
1612 all_wiphys_idle = ath9k_all_wiphys_idle(sc);
1613 ath9k_set_wiphy_idle(aphy, idle);
1615 enable_radio = (!idle && all_wiphys_idle);
1618 * After we unlock here its possible another wiphy
1619 * can be re-renabled so to account for that we will
1620 * only disable the radio toward the end of this routine
1621 * if by then all wiphys are still idle.
1623 spin_unlock_bh(&sc->wiphy_lock);
1626 sc->ps_idle = false;
1627 ath_radio_enable(sc, hw);
1628 ath_print(common, ATH_DBG_CONFIG,
1629 "not-idle: enabling radio\n");
1634 * We just prepare to enable PS. We have to wait until our AP has
1635 * ACK'd our null data frame to disable RX otherwise we'll ignore
1636 * those ACKs and end up retransmitting the same null data frames.
1637 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1639 if (changed & IEEE80211_CONF_CHANGE_PS) {
1640 unsigned long flags;
1641 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1642 if (conf->flags & IEEE80211_CONF_PS)
1643 ath9k_enable_ps(sc);
1645 ath9k_disable_ps(sc);
1646 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1649 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1650 if (conf->flags & IEEE80211_CONF_MONITOR) {
1651 ath_print(common, ATH_DBG_CONFIG,
1652 "HW opmode set to Monitor mode\n");
1653 sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
1657 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1658 struct ieee80211_channel *curchan = hw->conf.channel;
1659 int pos = curchan->hw_value;
1661 unsigned long flags;
1664 old_pos = ah->curchan - &ah->channels[0];
1666 aphy->chan_idx = pos;
1667 aphy->chan_is_ht = conf_is_ht(conf);
1668 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1669 sc->sc_flags |= SC_OP_OFFCHANNEL;
1671 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1673 if (aphy->state == ATH_WIPHY_SCAN ||
1674 aphy->state == ATH_WIPHY_ACTIVE)
1675 ath9k_wiphy_pause_all_forced(sc, aphy);
1678 * Do not change operational channel based on a paused
1681 goto skip_chan_change;
1684 ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1685 curchan->center_freq);
1687 /* XXX: remove me eventualy */
1688 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1690 ath_update_chainmask(sc, conf_is_ht(conf));
1692 /* update survey stats for the old channel before switching */
1693 spin_lock_irqsave(&common->cc_lock, flags);
1694 ath_update_survey_stats(sc);
1695 spin_unlock_irqrestore(&common->cc_lock, flags);
1698 * If the operating channel changes, change the survey in-use flags
1700 * Reset the survey data for the new channel, unless we're switching
1701 * back to the operating channel from an off-channel operation.
1703 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1704 sc->cur_survey != &sc->survey[pos]) {
1707 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1709 sc->cur_survey = &sc->survey[pos];
1711 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1712 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1713 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1714 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1717 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1718 ath_print(common, ATH_DBG_FATAL,
1719 "Unable to set channel\n");
1720 mutex_unlock(&sc->mutex);
1725 * The most recent snapshot of channel->noisefloor for the old
1726 * channel is only available after the hardware reset. Copy it to
1727 * the survey stats now.
1730 ath_update_survey_nf(sc, old_pos);
1734 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1735 sc->config.txpowlimit = 2 * conf->power_level;
1736 ath_update_txpow(sc);
1739 spin_lock_bh(&sc->wiphy_lock);
1740 disable_radio = ath9k_all_wiphys_idle(sc);
1741 spin_unlock_bh(&sc->wiphy_lock);
1743 if (disable_radio) {
1744 ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1746 ath_radio_disable(sc, hw);
1749 mutex_unlock(&sc->mutex);
1754 #define SUPPORTED_FILTERS \
1755 (FIF_PROMISC_IN_BSS | \
1760 FIF_BCN_PRBRESP_PROMISC | \
1764 /* FIXME: sc->sc_full_reset ? */
1765 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1766 unsigned int changed_flags,
1767 unsigned int *total_flags,
1770 struct ath_wiphy *aphy = hw->priv;
1771 struct ath_softc *sc = aphy->sc;
1774 changed_flags &= SUPPORTED_FILTERS;
1775 *total_flags &= SUPPORTED_FILTERS;
1777 sc->rx.rxfilter = *total_flags;
1778 ath9k_ps_wakeup(sc);
1779 rfilt = ath_calcrxfilter(sc);
1780 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1781 ath9k_ps_restore(sc);
1783 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1784 "Set HW RX filter: 0x%x\n", rfilt);
1787 static int ath9k_sta_add(struct ieee80211_hw *hw,
1788 struct ieee80211_vif *vif,
1789 struct ieee80211_sta *sta)
1791 struct ath_wiphy *aphy = hw->priv;
1792 struct ath_softc *sc = aphy->sc;
1794 ath_node_attach(sc, sta);
1799 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1800 struct ieee80211_vif *vif,
1801 struct ieee80211_sta *sta)
1803 struct ath_wiphy *aphy = hw->priv;
1804 struct ath_softc *sc = aphy->sc;
1806 ath_node_detach(sc, sta);
1811 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1812 const struct ieee80211_tx_queue_params *params)
1814 struct ath_wiphy *aphy = hw->priv;
1815 struct ath_softc *sc = aphy->sc;
1816 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1817 struct ath9k_tx_queue_info qi;
1820 if (queue >= WME_NUM_AC)
1823 mutex_lock(&sc->mutex);
1825 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1827 qi.tqi_aifs = params->aifs;
1828 qi.tqi_cwmin = params->cw_min;
1829 qi.tqi_cwmax = params->cw_max;
1830 qi.tqi_burstTime = params->txop;
1831 qnum = ath_get_hal_qnum(queue, sc);
1833 ath_print(common, ATH_DBG_CONFIG,
1834 "Configure tx [queue/halq] [%d/%d], "
1835 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1836 queue, qnum, params->aifs, params->cw_min,
1837 params->cw_max, params->txop);
1839 ret = ath_txq_update(sc, qnum, &qi);
1841 ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
1843 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1844 if ((qnum == sc->tx.hwq_map[WME_AC_BE]) && !ret)
1845 ath_beaconq_config(sc);
1847 mutex_unlock(&sc->mutex);
1852 static int ath9k_set_key(struct ieee80211_hw *hw,
1853 enum set_key_cmd cmd,
1854 struct ieee80211_vif *vif,
1855 struct ieee80211_sta *sta,
1856 struct ieee80211_key_conf *key)
1858 struct ath_wiphy *aphy = hw->priv;
1859 struct ath_softc *sc = aphy->sc;
1860 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1863 if (modparam_nohwcrypt)
1866 mutex_lock(&sc->mutex);
1867 ath9k_ps_wakeup(sc);
1868 ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
1872 ret = ath_key_config(common, vif, sta, key);
1874 key->hw_key_idx = ret;
1875 /* push IV and Michael MIC generation to stack */
1876 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1877 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1878 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1879 if (sc->sc_ah->sw_mgmt_crypto &&
1880 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1881 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1886 ath_key_delete(common, key);
1892 ath9k_ps_restore(sc);
1893 mutex_unlock(&sc->mutex);
1898 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1899 struct ieee80211_vif *vif,
1900 struct ieee80211_bss_conf *bss_conf,
1903 struct ath_wiphy *aphy = hw->priv;
1904 struct ath_softc *sc = aphy->sc;
1905 struct ath_hw *ah = sc->sc_ah;
1906 struct ath_common *common = ath9k_hw_common(ah);
1907 struct ath_vif *avp = (void *)vif->drv_priv;
1911 mutex_lock(&sc->mutex);
1913 if (changed & BSS_CHANGED_BSSID) {
1915 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1916 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1918 ath9k_hw_write_associd(ah);
1920 /* Set aggregation protection mode parameters */
1921 sc->config.ath_aggr_prot = 0;
1923 /* Only legacy IBSS for now */
1924 if (vif->type == NL80211_IFTYPE_ADHOC)
1925 ath_update_chainmask(sc, 0);
1927 ath_print(common, ATH_DBG_CONFIG,
1928 "BSSID: %pM aid: 0x%x\n",
1929 common->curbssid, common->curaid);
1931 /* need to reconfigure the beacon */
1932 sc->sc_flags &= ~SC_OP_BEACONS ;
1935 /* Enable transmission of beacons (AP, IBSS, MESH) */
1936 if ((changed & BSS_CHANGED_BEACON) ||
1937 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1938 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1939 error = ath_beacon_alloc(aphy, vif);
1941 ath_beacon_config(sc, vif);
1944 if (changed & BSS_CHANGED_ERP_SLOT) {
1945 if (bss_conf->use_short_slot)
1949 if (vif->type == NL80211_IFTYPE_AP) {
1951 * Defer update, so that connected stations can adjust
1952 * their settings at the same time.
1953 * See beacon.c for more details
1955 sc->beacon.slottime = slottime;
1956 sc->beacon.updateslot = UPDATE;
1958 ah->slottime = slottime;
1959 ath9k_hw_init_global_settings(ah);
1963 /* Disable transmission of beacons */
1964 if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1965 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1967 if (changed & BSS_CHANGED_BEACON_INT) {
1968 sc->beacon_interval = bss_conf->beacon_int;
1970 * In case of AP mode, the HW TSF has to be reset
1971 * when the beacon interval changes.
1973 if (vif->type == NL80211_IFTYPE_AP) {
1974 sc->sc_flags |= SC_OP_TSF_RESET;
1975 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1976 error = ath_beacon_alloc(aphy, vif);
1978 ath_beacon_config(sc, vif);
1980 ath_beacon_config(sc, vif);
1984 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1985 ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1986 bss_conf->use_short_preamble);
1987 if (bss_conf->use_short_preamble)
1988 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1990 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1993 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1994 ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1995 bss_conf->use_cts_prot);
1996 if (bss_conf->use_cts_prot &&
1997 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1998 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2000 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2003 if (changed & BSS_CHANGED_ASSOC) {
2004 ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
2006 ath9k_bss_assoc_info(sc, vif, bss_conf);
2009 mutex_unlock(&sc->mutex);
2012 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2015 struct ath_wiphy *aphy = hw->priv;
2016 struct ath_softc *sc = aphy->sc;
2018 mutex_lock(&sc->mutex);
2019 tsf = ath9k_hw_gettsf64(sc->sc_ah);
2020 mutex_unlock(&sc->mutex);
2025 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2027 struct ath_wiphy *aphy = hw->priv;
2028 struct ath_softc *sc = aphy->sc;
2030 mutex_lock(&sc->mutex);
2031 ath9k_hw_settsf64(sc->sc_ah, tsf);
2032 mutex_unlock(&sc->mutex);
2035 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2037 struct ath_wiphy *aphy = hw->priv;
2038 struct ath_softc *sc = aphy->sc;
2040 mutex_lock(&sc->mutex);
2042 ath9k_ps_wakeup(sc);
2043 ath9k_hw_reset_tsf(sc->sc_ah);
2044 ath9k_ps_restore(sc);
2046 mutex_unlock(&sc->mutex);
2049 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2050 struct ieee80211_vif *vif,
2051 enum ieee80211_ampdu_mlme_action action,
2052 struct ieee80211_sta *sta,
2055 struct ath_wiphy *aphy = hw->priv;
2056 struct ath_softc *sc = aphy->sc;
2062 case IEEE80211_AMPDU_RX_START:
2063 if (!(sc->sc_flags & SC_OP_RXAGGR))
2066 case IEEE80211_AMPDU_RX_STOP:
2068 case IEEE80211_AMPDU_TX_START:
2069 ath9k_ps_wakeup(sc);
2070 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2072 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2073 ath9k_ps_restore(sc);
2075 case IEEE80211_AMPDU_TX_STOP:
2076 ath9k_ps_wakeup(sc);
2077 ath_tx_aggr_stop(sc, sta, tid);
2078 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2079 ath9k_ps_restore(sc);
2081 case IEEE80211_AMPDU_TX_OPERATIONAL:
2082 ath9k_ps_wakeup(sc);
2083 ath_tx_aggr_resume(sc, sta, tid);
2084 ath9k_ps_restore(sc);
2087 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
2088 "Unknown AMPDU action\n");
2096 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2097 struct survey_info *survey)
2099 struct ath_wiphy *aphy = hw->priv;
2100 struct ath_softc *sc = aphy->sc;
2101 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2102 struct ieee80211_supported_band *sband;
2103 struct ieee80211_channel *chan;
2104 unsigned long flags;
2107 spin_lock_irqsave(&common->cc_lock, flags);
2109 ath_update_survey_stats(sc);
2111 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2112 if (sband && idx >= sband->n_channels) {
2113 idx -= sband->n_channels;
2118 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2120 if (!sband || idx >= sband->n_channels) {
2121 spin_unlock_irqrestore(&common->cc_lock, flags);
2125 chan = &sband->channels[idx];
2126 pos = chan->hw_value;
2127 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2128 survey->channel = chan;
2129 spin_unlock_irqrestore(&common->cc_lock, flags);
2134 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2136 struct ath_wiphy *aphy = hw->priv;
2137 struct ath_softc *sc = aphy->sc;
2139 mutex_lock(&sc->mutex);
2140 if (ath9k_wiphy_scanning(sc)) {
2142 * There is a race here in mac80211 but fixing it requires
2143 * we revisit how we handle the scan complete callback.
2144 * After mac80211 fixes we will not have configured hardware
2145 * to the home channel nor would we have configured the RX
2148 mutex_unlock(&sc->mutex);
2152 aphy->state = ATH_WIPHY_SCAN;
2153 ath9k_wiphy_pause_all_forced(sc, aphy);
2154 mutex_unlock(&sc->mutex);
2158 * XXX: this requires a revisit after the driver
2159 * scan_complete gets moved to another place/removed in mac80211.
2161 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2163 struct ath_wiphy *aphy = hw->priv;
2164 struct ath_softc *sc = aphy->sc;
2166 mutex_lock(&sc->mutex);
2167 aphy->state = ATH_WIPHY_ACTIVE;
2168 mutex_unlock(&sc->mutex);
2171 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2173 struct ath_wiphy *aphy = hw->priv;
2174 struct ath_softc *sc = aphy->sc;
2175 struct ath_hw *ah = sc->sc_ah;
2177 mutex_lock(&sc->mutex);
2178 ah->coverage_class = coverage_class;
2179 ath9k_hw_init_global_settings(ah);
2180 mutex_unlock(&sc->mutex);
2183 struct ieee80211_ops ath9k_ops = {
2185 .start = ath9k_start,
2187 .add_interface = ath9k_add_interface,
2188 .remove_interface = ath9k_remove_interface,
2189 .config = ath9k_config,
2190 .configure_filter = ath9k_configure_filter,
2191 .sta_add = ath9k_sta_add,
2192 .sta_remove = ath9k_sta_remove,
2193 .conf_tx = ath9k_conf_tx,
2194 .bss_info_changed = ath9k_bss_info_changed,
2195 .set_key = ath9k_set_key,
2196 .get_tsf = ath9k_get_tsf,
2197 .set_tsf = ath9k_set_tsf,
2198 .reset_tsf = ath9k_reset_tsf,
2199 .ampdu_action = ath9k_ampdu_action,
2200 .get_survey = ath9k_get_survey,
2201 .sw_scan_start = ath9k_sw_scan_start,
2202 .sw_scan_complete = ath9k_sw_scan_complete,
2203 .rfkill_poll = ath9k_rfkill_poll_state,
2204 .set_coverage_class = ath9k_set_coverage_class,