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_update_txpow(struct ath_softc *sc)
23 struct ath_hw *ah = sc->sc_ah;
25 if (sc->curtxpow != sc->config.txpowlimit) {
26 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
27 /* read back in case value is clamped */
28 sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
32 static u8 parse_mpdudensity(u8 mpdudensity)
35 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
36 * 0 for no restriction
45 switch (mpdudensity) {
51 /* Our lower layer calculations limit our precision to
67 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
68 struct ieee80211_hw *hw)
70 struct ieee80211_channel *curchan = hw->conf.channel;
71 struct ath9k_channel *channel;
74 chan_idx = curchan->hw_value;
75 channel = &sc->sc_ah->channels[chan_idx];
76 ath9k_cmn_update_ichannel(channel, curchan, hw->conf.channel_type);
80 bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
85 spin_lock_irqsave(&sc->sc_pm_lock, flags);
86 ret = ath9k_hw_setpower(sc->sc_ah, mode);
87 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
92 void ath9k_ps_wakeup(struct ath_softc *sc)
94 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
96 enum ath9k_power_mode power_mode;
98 spin_lock_irqsave(&sc->sc_pm_lock, flags);
99 if (++sc->ps_usecount != 1)
102 power_mode = sc->sc_ah->power_mode;
103 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
106 * While the hardware is asleep, the cycle counters contain no
107 * useful data. Better clear them now so that they don't mess up
108 * survey data results.
110 if (power_mode != ATH9K_PM_AWAKE) {
111 spin_lock(&common->cc_lock);
112 ath_hw_cycle_counters_update(common);
113 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
114 spin_unlock(&common->cc_lock);
118 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
121 void ath9k_ps_restore(struct ath_softc *sc)
123 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
126 spin_lock_irqsave(&sc->sc_pm_lock, flags);
127 if (--sc->ps_usecount != 0)
130 spin_lock(&common->cc_lock);
131 ath_hw_cycle_counters_update(common);
132 spin_unlock(&common->cc_lock);
135 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
136 else if (sc->ps_enabled &&
137 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
139 PS_WAIT_FOR_PSPOLL_DATA |
140 PS_WAIT_FOR_TX_ACK)))
141 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
144 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
147 static void ath_start_ani(struct ath_common *common)
149 struct ath_hw *ah = common->ah;
150 unsigned long timestamp = jiffies_to_msecs(jiffies);
151 struct ath_softc *sc = (struct ath_softc *) common->priv;
153 if (!(sc->sc_flags & SC_OP_ANI_RUN))
156 if (sc->sc_flags & SC_OP_OFFCHANNEL)
159 common->ani.longcal_timer = timestamp;
160 common->ani.shortcal_timer = timestamp;
161 common->ani.checkani_timer = timestamp;
163 mod_timer(&common->ani.timer,
165 msecs_to_jiffies((u32)ah->config.ani_poll_interval));
168 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
170 struct ath_hw *ah = sc->sc_ah;
171 struct ath9k_channel *chan = &ah->channels[channel];
172 struct survey_info *survey = &sc->survey[channel];
174 if (chan->noisefloor) {
175 survey->filled |= SURVEY_INFO_NOISE_DBM;
176 survey->noise = chan->noisefloor;
180 static void ath_update_survey_stats(struct ath_softc *sc)
182 struct ath_hw *ah = sc->sc_ah;
183 struct ath_common *common = ath9k_hw_common(ah);
184 int pos = ah->curchan - &ah->channels[0];
185 struct survey_info *survey = &sc->survey[pos];
186 struct ath_cycle_counters *cc = &common->cc_survey;
187 unsigned int div = common->clockrate * 1000;
192 if (ah->power_mode == ATH9K_PM_AWAKE)
193 ath_hw_cycle_counters_update(common);
195 if (cc->cycles > 0) {
196 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
197 SURVEY_INFO_CHANNEL_TIME_BUSY |
198 SURVEY_INFO_CHANNEL_TIME_RX |
199 SURVEY_INFO_CHANNEL_TIME_TX;
200 survey->channel_time += cc->cycles / div;
201 survey->channel_time_busy += cc->rx_busy / div;
202 survey->channel_time_rx += cc->rx_frame / div;
203 survey->channel_time_tx += cc->tx_frame / div;
205 memset(cc, 0, sizeof(*cc));
207 ath_update_survey_nf(sc, pos);
211 * Set/change channels. If the channel is really being changed, it's done
212 * by reseting the chip. To accomplish this we must first cleanup any pending
213 * DMA, then restart stuff.
215 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
216 struct ath9k_channel *hchan)
218 struct ath_hw *ah = sc->sc_ah;
219 struct ath_common *common = ath9k_hw_common(ah);
220 struct ieee80211_conf *conf = &common->hw->conf;
221 bool fastcc = true, stopped;
222 struct ieee80211_channel *channel = hw->conf.channel;
223 struct ath9k_hw_cal_data *caldata = NULL;
226 if (sc->sc_flags & SC_OP_INVALID)
229 del_timer_sync(&common->ani.timer);
230 cancel_work_sync(&sc->paprd_work);
231 cancel_work_sync(&sc->hw_check_work);
232 cancel_delayed_work_sync(&sc->tx_complete_work);
233 cancel_delayed_work_sync(&sc->hw_pll_work);
237 spin_lock_bh(&sc->sc_pcu_lock);
240 * This is only performed if the channel settings have
243 * To switch channels clear any pending DMA operations;
244 * wait long enough for the RX fifo to drain, reset the
245 * hardware at the new frequency, and then re-enable
246 * the relevant bits of the h/w.
248 ath9k_hw_disable_interrupts(ah);
249 stopped = ath_drain_all_txq(sc, false);
251 if (!ath_stoprecv(sc))
254 if (!ath9k_hw_check_alive(ah))
257 /* XXX: do not flush receive queue here. We don't want
258 * to flush data frames already in queue because of
259 * changing channel. */
261 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
264 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
265 caldata = &sc->caldata;
267 ath_dbg(common, ATH_DBG_CONFIG,
268 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
269 sc->sc_ah->curchan->channel,
270 channel->center_freq, conf_is_ht40(conf),
273 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
276 "Unable to reset channel (%u MHz), reset status %d\n",
277 channel->center_freq, r);
281 if (ath_startrecv(sc) != 0) {
282 ath_err(common, "Unable to restart recv logic\n");
287 ath_update_txpow(sc);
288 ath9k_hw_set_interrupts(ah, ah->imask);
290 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
291 if (sc->sc_flags & SC_OP_BEACONS)
292 ath_beacon_config(sc, NULL);
293 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
294 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
295 ath_start_ani(common);
299 ieee80211_wake_queues(hw);
301 spin_unlock_bh(&sc->sc_pcu_lock);
303 ath9k_ps_restore(sc);
307 static void ath_paprd_activate(struct ath_softc *sc)
309 struct ath_hw *ah = sc->sc_ah;
310 struct ath9k_hw_cal_data *caldata = ah->caldata;
311 struct ath_common *common = ath9k_hw_common(ah);
314 if (!caldata || !caldata->paprd_done)
318 ar9003_paprd_enable(ah, false);
319 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
320 if (!(common->tx_chainmask & BIT(chain)))
323 ar9003_paprd_populate_single_table(ah, caldata, chain);
326 ar9003_paprd_enable(ah, true);
327 ath9k_ps_restore(sc);
330 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
332 struct ieee80211_hw *hw = sc->hw;
333 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
334 struct ath_hw *ah = sc->sc_ah;
335 struct ath_common *common = ath9k_hw_common(ah);
336 struct ath_tx_control txctl;
339 memset(&txctl, 0, sizeof(txctl));
340 txctl.txq = sc->tx.txq_map[WME_AC_BE];
342 memset(tx_info, 0, sizeof(*tx_info));
343 tx_info->band = hw->conf.channel->band;
344 tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
345 tx_info->control.rates[0].idx = 0;
346 tx_info->control.rates[0].count = 1;
347 tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
348 tx_info->control.rates[1].idx = -1;
350 init_completion(&sc->paprd_complete);
351 sc->paprd_pending = true;
352 txctl.paprd = BIT(chain);
354 if (ath_tx_start(hw, skb, &txctl) != 0) {
355 ath_dbg(common, ATH_DBG_XMIT, "PAPRD TX failed\n");
356 dev_kfree_skb_any(skb);
360 time_left = wait_for_completion_timeout(&sc->paprd_complete,
361 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
362 sc->paprd_pending = false;
365 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE,
366 "Timeout waiting for paprd training on TX chain %d\n",
372 void ath_paprd_calibrate(struct work_struct *work)
374 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
375 struct ieee80211_hw *hw = sc->hw;
376 struct ath_hw *ah = sc->sc_ah;
377 struct ieee80211_hdr *hdr;
378 struct sk_buff *skb = NULL;
379 struct ath9k_hw_cal_data *caldata = ah->caldata;
380 struct ath_common *common = ath9k_hw_common(ah);
389 if (ar9003_paprd_init_table(ah) < 0)
392 skb = alloc_skb(len, GFP_KERNEL);
397 memset(skb->data, 0, len);
398 hdr = (struct ieee80211_hdr *)skb->data;
399 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
400 hdr->frame_control = cpu_to_le16(ftype);
401 hdr->duration_id = cpu_to_le16(10);
402 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
403 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
404 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
407 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
408 if (!(common->tx_chainmask & BIT(chain)))
413 ath_dbg(common, ATH_DBG_CALIBRATE,
414 "Sending PAPRD frame for thermal measurement "
415 "on chain %d\n", chain);
416 if (!ath_paprd_send_frame(sc, skb, chain))
419 ar9003_paprd_setup_gain_table(ah, chain);
421 ath_dbg(common, ATH_DBG_CALIBRATE,
422 "Sending PAPRD training frame on chain %d\n", chain);
423 if (!ath_paprd_send_frame(sc, skb, chain))
426 if (!ar9003_paprd_is_done(ah))
429 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
437 caldata->paprd_done = true;
438 ath_paprd_activate(sc);
442 ath9k_ps_restore(sc);
446 * This routine performs the periodic noise floor calibration function
447 * that is used to adjust and optimize the chip performance. This
448 * takes environmental changes (location, temperature) into account.
449 * When the task is complete, it reschedules itself depending on the
450 * appropriate interval that was calculated.
452 void ath_ani_calibrate(unsigned long data)
454 struct ath_softc *sc = (struct ath_softc *)data;
455 struct ath_hw *ah = sc->sc_ah;
456 struct ath_common *common = ath9k_hw_common(ah);
457 bool longcal = false;
458 bool shortcal = false;
459 bool aniflag = false;
460 unsigned int timestamp = jiffies_to_msecs(jiffies);
461 u32 cal_interval, short_cal_interval, long_cal_interval;
464 if (ah->caldata && ah->caldata->nfcal_interference)
465 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
467 long_cal_interval = ATH_LONG_CALINTERVAL;
469 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
470 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
472 /* Only calibrate if awake */
473 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
478 /* Long calibration runs independently of short calibration. */
479 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
481 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
482 common->ani.longcal_timer = timestamp;
485 /* Short calibration applies only while caldone is false */
486 if (!common->ani.caldone) {
487 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
489 ath_dbg(common, ATH_DBG_ANI,
490 "shortcal @%lu\n", jiffies);
491 common->ani.shortcal_timer = timestamp;
492 common->ani.resetcal_timer = timestamp;
495 if ((timestamp - common->ani.resetcal_timer) >=
496 ATH_RESTART_CALINTERVAL) {
497 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
498 if (common->ani.caldone)
499 common->ani.resetcal_timer = timestamp;
503 /* Verify whether we must check ANI */
504 if ((timestamp - common->ani.checkani_timer) >=
505 ah->config.ani_poll_interval) {
507 common->ani.checkani_timer = timestamp;
510 /* Skip all processing if there's nothing to do. */
511 if (longcal || shortcal || aniflag) {
512 /* Call ANI routine if necessary */
514 spin_lock_irqsave(&common->cc_lock, flags);
515 ath9k_hw_ani_monitor(ah, ah->curchan);
516 ath_update_survey_stats(sc);
517 spin_unlock_irqrestore(&common->cc_lock, flags);
520 /* Perform calibration if necessary */
521 if (longcal || shortcal) {
522 common->ani.caldone =
523 ath9k_hw_calibrate(ah,
525 common->rx_chainmask,
530 ath9k_ps_restore(sc);
534 * Set timer interval based on previous results.
535 * The interval must be the shortest necessary to satisfy ANI,
536 * short calibration and long calibration.
538 cal_interval = ATH_LONG_CALINTERVAL;
539 if (sc->sc_ah->config.enable_ani)
540 cal_interval = min(cal_interval,
541 (u32)ah->config.ani_poll_interval);
542 if (!common->ani.caldone)
543 cal_interval = min(cal_interval, (u32)short_cal_interval);
545 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
546 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
547 if (!ah->caldata->paprd_done)
548 ieee80211_queue_work(sc->hw, &sc->paprd_work);
549 else if (!ah->paprd_table_write_done)
550 ath_paprd_activate(sc);
554 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
557 struct ath_hw *ah = sc->sc_ah;
558 an = (struct ath_node *)sta->drv_priv;
560 #ifdef CONFIG_ATH9K_DEBUGFS
561 spin_lock(&sc->nodes_lock);
562 list_add(&an->list, &sc->nodes);
563 spin_unlock(&sc->nodes_lock);
566 if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM)
567 sc->sc_flags |= SC_OP_ENABLE_APM;
569 if (sc->sc_flags & SC_OP_TXAGGR) {
570 ath_tx_node_init(sc, an);
571 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
572 sta->ht_cap.ampdu_factor);
573 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
577 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
579 struct ath_node *an = (struct ath_node *)sta->drv_priv;
581 #ifdef CONFIG_ATH9K_DEBUGFS
582 spin_lock(&sc->nodes_lock);
584 spin_unlock(&sc->nodes_lock);
588 if (sc->sc_flags & SC_OP_TXAGGR)
589 ath_tx_node_cleanup(sc, an);
592 void ath_hw_check(struct work_struct *work)
594 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
599 for (i = 0; i < 3; i++) {
600 if (ath9k_hw_check_alive(sc->sc_ah))
608 ath9k_ps_restore(sc);
611 void ath9k_tasklet(unsigned long data)
613 struct ath_softc *sc = (struct ath_softc *)data;
614 struct ath_hw *ah = sc->sc_ah;
615 struct ath_common *common = ath9k_hw_common(ah);
617 u32 status = sc->intrstatus;
620 if (status & ATH9K_INT_FATAL) {
626 spin_lock(&sc->sc_pcu_lock);
629 * Only run the baseband hang check if beacons stop working in AP or
630 * IBSS mode, because it has a high false positive rate. For station
631 * mode it should not be necessary, since the upper layers will detect
632 * this through a beacon miss automatically and the following channel
633 * change will trigger a hardware reset anyway
635 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
636 !ath9k_hw_check_alive(ah))
637 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
639 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
640 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
643 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
645 if (status & rxmask) {
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);
654 if (status & ATH9K_INT_TX) {
655 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
656 ath_tx_edma_tasklet(sc);
661 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
663 * TSF sync does not look correct; remain awake to sync with
666 ath_dbg(common, ATH_DBG_PS,
667 "TSFOOR - Sync with next Beacon\n");
668 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
671 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
672 if (status & ATH9K_INT_GENTIMER)
673 ath_gen_timer_isr(sc->sc_ah);
675 /* re-enable hardware interrupt */
676 ath9k_hw_enable_interrupts(ah);
678 spin_unlock(&sc->sc_pcu_lock);
679 ath9k_ps_restore(sc);
682 irqreturn_t ath_isr(int irq, void *dev)
684 #define SCHED_INTR ( \
697 struct ath_softc *sc = dev;
698 struct ath_hw *ah = sc->sc_ah;
699 struct ath_common *common = ath9k_hw_common(ah);
700 enum ath9k_int status;
704 * The hardware is not ready/present, don't
705 * touch anything. Note this can happen early
706 * on if the IRQ is shared.
708 if (sc->sc_flags & SC_OP_INVALID)
712 /* shared irq, not for us */
714 if (!ath9k_hw_intrpend(ah))
718 * Figure out the reason(s) for the interrupt. Note
719 * that the hal returns a pseudo-ISR that may include
720 * bits we haven't explicitly enabled so we mask the
721 * value to insure we only process bits we requested.
723 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
724 status &= ah->imask; /* discard unasked-for bits */
727 * If there are no status bits set, then this interrupt was not
728 * for me (should have been caught above).
733 /* Cache the status */
734 sc->intrstatus = status;
736 if (status & SCHED_INTR)
740 * If a FATAL or RXORN interrupt is received, we have to reset the
743 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
744 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
747 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
748 (status & ATH9K_INT_BB_WATCHDOG)) {
750 spin_lock(&common->cc_lock);
751 ath_hw_cycle_counters_update(common);
752 ar9003_hw_bb_watchdog_dbg_info(ah);
753 spin_unlock(&common->cc_lock);
758 if (status & ATH9K_INT_SWBA)
759 tasklet_schedule(&sc->bcon_tasklet);
761 if (status & ATH9K_INT_TXURN)
762 ath9k_hw_updatetxtriglevel(ah, true);
764 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
765 if (status & ATH9K_INT_RXEOL) {
766 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
767 ath9k_hw_set_interrupts(ah, ah->imask);
771 if (status & ATH9K_INT_MIB) {
773 * Disable interrupts until we service the MIB
774 * interrupt; otherwise it will continue to
777 ath9k_hw_disable_interrupts(ah);
779 * Let the hal handle the event. We assume
780 * it will clear whatever condition caused
783 spin_lock(&common->cc_lock);
784 ath9k_hw_proc_mib_event(ah);
785 spin_unlock(&common->cc_lock);
786 ath9k_hw_enable_interrupts(ah);
789 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
790 if (status & ATH9K_INT_TIM_TIMER) {
791 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
793 /* Clear RxAbort bit so that we can
795 ath9k_setpower(sc, ATH9K_PM_AWAKE);
796 ath9k_hw_setrxabort(sc->sc_ah, 0);
797 sc->ps_flags |= PS_WAIT_FOR_BEACON;
802 ath_debug_stat_interrupt(sc, status);
805 /* turn off every interrupt */
806 ath9k_hw_disable_interrupts(ah);
807 tasklet_schedule(&sc->intr_tq);
815 static void ath9k_bss_assoc_info(struct ath_softc *sc,
816 struct ieee80211_hw *hw,
817 struct ieee80211_vif *vif,
818 struct ieee80211_bss_conf *bss_conf)
820 struct ath_hw *ah = sc->sc_ah;
821 struct ath_common *common = ath9k_hw_common(ah);
823 if (bss_conf->assoc) {
824 ath_dbg(common, ATH_DBG_CONFIG,
825 "Bss Info ASSOC %d, bssid: %pM\n",
826 bss_conf->aid, common->curbssid);
828 /* New association, store aid */
829 common->curaid = bss_conf->aid;
830 ath9k_hw_write_associd(ah);
833 * Request a re-configuration of Beacon related timers
834 * on the receipt of the first Beacon frame (i.e.,
835 * after time sync with the AP).
837 sc->ps_flags |= PS_BEACON_SYNC;
839 /* Configure the beacon */
840 ath_beacon_config(sc, vif);
842 /* Reset rssi stats */
843 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
844 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
846 sc->sc_flags |= SC_OP_ANI_RUN;
847 ath_start_ani(common);
849 ath_dbg(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
852 sc->sc_flags &= ~SC_OP_ANI_RUN;
853 del_timer_sync(&common->ani.timer);
857 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
859 struct ath_hw *ah = sc->sc_ah;
860 struct ath_common *common = ath9k_hw_common(ah);
861 struct ieee80211_channel *channel = hw->conf.channel;
865 spin_lock_bh(&sc->sc_pcu_lock);
867 ath9k_hw_configpcipowersave(ah, 0, 0);
870 ah->curchan = ath_get_curchannel(sc, sc->hw);
872 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
875 "Unable to reset channel (%u MHz), reset status %d\n",
876 channel->center_freq, r);
879 ath_update_txpow(sc);
880 if (ath_startrecv(sc) != 0) {
881 ath_err(common, "Unable to restart recv logic\n");
884 if (sc->sc_flags & SC_OP_BEACONS)
885 ath_beacon_config(sc, NULL); /* restart beacons */
887 /* Re-Enable interrupts */
888 ath9k_hw_set_interrupts(ah, ah->imask);
891 ath9k_hw_cfg_output(ah, ah->led_pin,
892 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
893 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
895 ieee80211_wake_queues(hw);
897 spin_unlock_bh(&sc->sc_pcu_lock);
899 ath9k_ps_restore(sc);
902 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
904 struct ath_hw *ah = sc->sc_ah;
905 struct ieee80211_channel *channel = hw->conf.channel;
909 spin_lock_bh(&sc->sc_pcu_lock);
911 ieee80211_stop_queues(hw);
914 * Keep the LED on when the radio is disabled
915 * during idle unassociated state.
918 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
919 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
922 /* Disable interrupts */
923 ath9k_hw_disable_interrupts(ah);
925 ath_drain_all_txq(sc, false); /* clear pending tx frames */
927 ath_stoprecv(sc); /* turn off frame recv */
928 ath_flushrecv(sc); /* flush recv queue */
931 ah->curchan = ath_get_curchannel(sc, hw);
933 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
935 ath_err(ath9k_hw_common(sc->sc_ah),
936 "Unable to reset channel (%u MHz), reset status %d\n",
937 channel->center_freq, r);
940 ath9k_hw_phy_disable(ah);
942 ath9k_hw_configpcipowersave(ah, 1, 1);
944 spin_unlock_bh(&sc->sc_pcu_lock);
945 ath9k_ps_restore(sc);
948 int ath_reset(struct ath_softc *sc, bool retry_tx)
950 struct ath_hw *ah = sc->sc_ah;
951 struct ath_common *common = ath9k_hw_common(ah);
952 struct ieee80211_hw *hw = sc->hw;
956 del_timer_sync(&common->ani.timer);
959 spin_lock_bh(&sc->sc_pcu_lock);
961 ieee80211_stop_queues(hw);
963 ath9k_hw_disable_interrupts(ah);
964 ath_drain_all_txq(sc, retry_tx);
969 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
972 "Unable to reset hardware; reset status %d\n", r);
974 if (ath_startrecv(sc) != 0)
975 ath_err(common, "Unable to start recv logic\n");
978 * We may be doing a reset in response to a request
979 * that changes the channel so update any state that
980 * might change as a result.
982 ath_update_txpow(sc);
984 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
985 ath_beacon_config(sc, NULL); /* restart beacons */
987 ath9k_hw_set_interrupts(ah, ah->imask);
991 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
992 if (ATH_TXQ_SETUP(sc, i)) {
993 spin_lock_bh(&sc->tx.txq[i].axq_lock);
994 ath_txq_schedule(sc, &sc->tx.txq[i]);
995 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1000 ieee80211_wake_queues(hw);
1001 spin_unlock_bh(&sc->sc_pcu_lock);
1004 ath_start_ani(common);
1005 ath9k_ps_restore(sc);
1010 /**********************/
1011 /* mac80211 callbacks */
1012 /**********************/
1014 static int ath9k_start(struct ieee80211_hw *hw)
1016 struct ath_softc *sc = hw->priv;
1017 struct ath_hw *ah = sc->sc_ah;
1018 struct ath_common *common = ath9k_hw_common(ah);
1019 struct ieee80211_channel *curchan = hw->conf.channel;
1020 struct ath9k_channel *init_channel;
1023 ath_dbg(common, ATH_DBG_CONFIG,
1024 "Starting driver with initial channel: %d MHz\n",
1025 curchan->center_freq);
1027 mutex_lock(&sc->mutex);
1029 /* setup initial channel */
1030 sc->chan_idx = curchan->hw_value;
1032 init_channel = ath_get_curchannel(sc, hw);
1034 /* Reset SERDES registers */
1035 ath9k_hw_configpcipowersave(ah, 0, 0);
1038 * The basic interface to setting the hardware in a good
1039 * state is ``reset''. On return the hardware is known to
1040 * be powered up and with interrupts disabled. This must
1041 * be followed by initialization of the appropriate bits
1042 * and then setup of the interrupt mask.
1044 spin_lock_bh(&sc->sc_pcu_lock);
1045 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1048 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1049 r, curchan->center_freq);
1050 spin_unlock_bh(&sc->sc_pcu_lock);
1055 * This is needed only to setup initial state
1056 * but it's best done after a reset.
1058 ath_update_txpow(sc);
1061 * Setup the hardware after reset:
1062 * The receive engine is set going.
1063 * Frame transmit is handled entirely
1064 * in the frame output path; there's nothing to do
1065 * here except setup the interrupt mask.
1067 if (ath_startrecv(sc) != 0) {
1068 ath_err(common, "Unable to start recv logic\n");
1070 spin_unlock_bh(&sc->sc_pcu_lock);
1073 spin_unlock_bh(&sc->sc_pcu_lock);
1075 /* Setup our intr mask. */
1076 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1077 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1080 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1081 ah->imask |= ATH9K_INT_RXHP |
1083 ATH9K_INT_BB_WATCHDOG;
1085 ah->imask |= ATH9K_INT_RX;
1087 ah->imask |= ATH9K_INT_GTT;
1089 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1090 ah->imask |= ATH9K_INT_CST;
1092 sc->sc_flags &= ~SC_OP_INVALID;
1093 sc->sc_ah->is_monitoring = false;
1095 /* Disable BMISS interrupt when we're not associated */
1096 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1097 ath9k_hw_set_interrupts(ah, ah->imask);
1099 ieee80211_wake_queues(hw);
1101 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1103 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1104 !ah->btcoex_hw.enabled) {
1105 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1106 AR_STOMP_LOW_WLAN_WGHT);
1107 ath9k_hw_btcoex_enable(ah);
1109 if (common->bus_ops->bt_coex_prep)
1110 common->bus_ops->bt_coex_prep(common);
1111 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1112 ath9k_btcoex_timer_resume(sc);
1115 /* User has the option to provide pm-qos value as a module
1116 * parameter rather than using the default value of
1117 * 'ATH9K_PM_QOS_DEFAULT_VALUE'.
1119 pm_qos_update_request(&sc->pm_qos_req, ath9k_pm_qos_value);
1121 if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1122 common->bus_ops->extn_synch_en(common);
1125 mutex_unlock(&sc->mutex);
1130 static int ath9k_tx(struct ieee80211_hw *hw,
1131 struct sk_buff *skb)
1133 struct ath_softc *sc = hw->priv;
1134 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1135 struct ath_tx_control txctl;
1136 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1138 if (sc->ps_enabled) {
1140 * mac80211 does not set PM field for normal data frames, so we
1141 * need to update that based on the current PS mode.
1143 if (ieee80211_is_data(hdr->frame_control) &&
1144 !ieee80211_is_nullfunc(hdr->frame_control) &&
1145 !ieee80211_has_pm(hdr->frame_control)) {
1146 ath_dbg(common, ATH_DBG_PS,
1147 "Add PM=1 for a TX frame while in PS mode\n");
1148 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1152 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1154 * We are using PS-Poll and mac80211 can request TX while in
1155 * power save mode. Need to wake up hardware for the TX to be
1156 * completed and if needed, also for RX of buffered frames.
1158 ath9k_ps_wakeup(sc);
1159 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1160 ath9k_hw_setrxabort(sc->sc_ah, 0);
1161 if (ieee80211_is_pspoll(hdr->frame_control)) {
1162 ath_dbg(common, ATH_DBG_PS,
1163 "Sending PS-Poll to pick a buffered frame\n");
1164 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1166 ath_dbg(common, ATH_DBG_PS,
1167 "Wake up to complete TX\n");
1168 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1171 * The actual restore operation will happen only after
1172 * the sc_flags bit is cleared. We are just dropping
1173 * the ps_usecount here.
1175 ath9k_ps_restore(sc);
1178 memset(&txctl, 0, sizeof(struct ath_tx_control));
1179 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1181 ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1183 if (ath_tx_start(hw, skb, &txctl) != 0) {
1184 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1190 dev_kfree_skb_any(skb);
1194 static void ath9k_stop(struct ieee80211_hw *hw)
1196 struct ath_softc *sc = hw->priv;
1197 struct ath_hw *ah = sc->sc_ah;
1198 struct ath_common *common = ath9k_hw_common(ah);
1200 mutex_lock(&sc->mutex);
1203 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1205 cancel_delayed_work_sync(&sc->tx_complete_work);
1206 cancel_delayed_work_sync(&sc->hw_pll_work);
1207 cancel_work_sync(&sc->paprd_work);
1208 cancel_work_sync(&sc->hw_check_work);
1210 if (sc->sc_flags & SC_OP_INVALID) {
1211 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1212 mutex_unlock(&sc->mutex);
1216 /* Ensure HW is awake when we try to shut it down. */
1217 ath9k_ps_wakeup(sc);
1219 if (ah->btcoex_hw.enabled) {
1220 ath9k_hw_btcoex_disable(ah);
1221 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1222 ath9k_btcoex_timer_pause(sc);
1225 spin_lock_bh(&sc->sc_pcu_lock);
1227 /* prevent tasklets to enable interrupts once we disable them */
1228 ah->imask &= ~ATH9K_INT_GLOBAL;
1230 /* make sure h/w will not generate any interrupt
1231 * before setting the invalid flag. */
1232 ath9k_hw_disable_interrupts(ah);
1234 if (!(sc->sc_flags & SC_OP_INVALID)) {
1235 ath_drain_all_txq(sc, false);
1237 ath9k_hw_phy_disable(ah);
1239 sc->rx.rxlink = NULL;
1242 dev_kfree_skb_any(sc->rx.frag);
1246 /* disable HAL and put h/w to sleep */
1247 ath9k_hw_disable(ah);
1248 ath9k_hw_configpcipowersave(ah, 1, 1);
1250 spin_unlock_bh(&sc->sc_pcu_lock);
1252 /* we can now sync irq and kill any running tasklets, since we already
1253 * disabled interrupts and not holding a spin lock */
1254 synchronize_irq(sc->irq);
1255 tasklet_kill(&sc->intr_tq);
1256 tasklet_kill(&sc->bcon_tasklet);
1258 ath9k_ps_restore(sc);
1261 ath_radio_disable(sc, hw);
1263 sc->sc_flags |= SC_OP_INVALID;
1265 pm_qos_update_request(&sc->pm_qos_req, PM_QOS_DEFAULT_VALUE);
1267 mutex_unlock(&sc->mutex);
1269 ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1272 bool ath9k_uses_beacons(int type)
1275 case NL80211_IFTYPE_AP:
1276 case NL80211_IFTYPE_ADHOC:
1277 case NL80211_IFTYPE_MESH_POINT:
1284 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1285 struct ieee80211_vif *vif)
1287 struct ath_vif *avp = (void *)vif->drv_priv;
1289 /* Disable SWBA interrupt */
1290 sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
1291 ath9k_ps_wakeup(sc);
1292 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1293 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1294 tasklet_kill(&sc->bcon_tasklet);
1295 ath9k_ps_restore(sc);
1297 ath_beacon_return(sc, avp);
1298 sc->sc_flags &= ~SC_OP_BEACONS;
1300 if (sc->nbcnvifs > 0) {
1301 /* Re-enable beaconing */
1302 sc->sc_ah->imask |= ATH9K_INT_SWBA;
1303 ath9k_ps_wakeup(sc);
1304 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1305 ath9k_ps_restore(sc);
1309 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1311 struct ath9k_vif_iter_data *iter_data = data;
1314 if (iter_data->hw_macaddr)
1315 for (i = 0; i < ETH_ALEN; i++)
1316 iter_data->mask[i] &=
1317 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1319 switch (vif->type) {
1320 case NL80211_IFTYPE_AP:
1323 case NL80211_IFTYPE_STATION:
1324 iter_data->nstations++;
1326 case NL80211_IFTYPE_ADHOC:
1327 iter_data->nadhocs++;
1329 case NL80211_IFTYPE_MESH_POINT:
1330 iter_data->nmeshes++;
1332 case NL80211_IFTYPE_WDS:
1336 iter_data->nothers++;
1341 /* Called with sc->mutex held. */
1342 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1343 struct ieee80211_vif *vif,
1344 struct ath9k_vif_iter_data *iter_data)
1346 struct ath_softc *sc = hw->priv;
1347 struct ath_hw *ah = sc->sc_ah;
1348 struct ath_common *common = ath9k_hw_common(ah);
1351 * Use the hardware MAC address as reference, the hardware uses it
1352 * together with the BSSID mask when matching addresses.
1354 memset(iter_data, 0, sizeof(*iter_data));
1355 iter_data->hw_macaddr = common->macaddr;
1356 memset(&iter_data->mask, 0xff, ETH_ALEN);
1359 ath9k_vif_iter(iter_data, vif->addr, vif);
1361 /* Get list of all active MAC addresses */
1362 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1366 /* Called with sc->mutex held. */
1367 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1368 struct ieee80211_vif *vif)
1370 struct ath_softc *sc = hw->priv;
1371 struct ath_hw *ah = sc->sc_ah;
1372 struct ath_common *common = ath9k_hw_common(ah);
1373 struct ath9k_vif_iter_data iter_data;
1375 ath9k_calculate_iter_data(hw, vif, &iter_data);
1377 /* Set BSSID mask. */
1378 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1379 ath_hw_setbssidmask(common);
1381 /* Set op-mode & TSF */
1382 if (iter_data.naps > 0) {
1383 ath9k_hw_set_tsfadjust(ah, 1);
1384 sc->sc_flags |= SC_OP_TSF_RESET;
1385 ah->opmode = NL80211_IFTYPE_AP;
1387 ath9k_hw_set_tsfadjust(ah, 0);
1388 sc->sc_flags &= ~SC_OP_TSF_RESET;
1390 if (iter_data.nwds + iter_data.nmeshes)
1391 ah->opmode = NL80211_IFTYPE_AP;
1392 else if (iter_data.nadhocs)
1393 ah->opmode = NL80211_IFTYPE_ADHOC;
1395 ah->opmode = NL80211_IFTYPE_STATION;
1399 * Enable MIB interrupts when there are hardware phy counters.
1401 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1402 if (ah->config.enable_ani)
1403 ah->imask |= ATH9K_INT_MIB;
1404 ah->imask |= ATH9K_INT_TSFOOR;
1406 ah->imask &= ~ATH9K_INT_MIB;
1407 ah->imask &= ~ATH9K_INT_TSFOOR;
1410 ath9k_hw_set_interrupts(ah, ah->imask);
1413 if ((iter_data.naps + iter_data.nadhocs) > 0) {
1414 sc->sc_flags |= SC_OP_ANI_RUN;
1415 ath_start_ani(common);
1417 sc->sc_flags &= ~SC_OP_ANI_RUN;
1418 del_timer_sync(&common->ani.timer);
1422 /* Called with sc->mutex held, vif counts set up properly. */
1423 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1424 struct ieee80211_vif *vif)
1426 struct ath_softc *sc = hw->priv;
1428 ath9k_calculate_summary_state(hw, vif);
1430 if (ath9k_uses_beacons(vif->type)) {
1432 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1433 /* This may fail because upper levels do not have beacons
1434 * properly configured yet. That's OK, we assume it
1435 * will be properly configured and then we will be notified
1436 * in the info_changed method and set up beacons properly
1439 error = ath_beacon_alloc(sc, vif);
1441 ath9k_reclaim_beacon(sc, vif);
1443 ath_beacon_config(sc, vif);
1448 static int ath9k_add_interface(struct ieee80211_hw *hw,
1449 struct ieee80211_vif *vif)
1451 struct ath_softc *sc = hw->priv;
1452 struct ath_hw *ah = sc->sc_ah;
1453 struct ath_common *common = ath9k_hw_common(ah);
1454 struct ath_vif *avp = (void *)vif->drv_priv;
1457 mutex_lock(&sc->mutex);
1459 switch (vif->type) {
1460 case NL80211_IFTYPE_STATION:
1461 case NL80211_IFTYPE_WDS:
1462 case NL80211_IFTYPE_ADHOC:
1463 case NL80211_IFTYPE_AP:
1464 case NL80211_IFTYPE_MESH_POINT:
1467 ath_err(common, "Interface type %d not yet supported\n",
1473 if (ath9k_uses_beacons(vif->type)) {
1474 if (sc->nbcnvifs >= ATH_BCBUF) {
1475 ath_err(common, "Not enough beacon buffers when adding"
1476 " new interface of type: %i\n",
1483 if ((vif->type == NL80211_IFTYPE_ADHOC) &&
1485 ath_err(common, "Cannot create ADHOC interface when other"
1486 " interfaces already exist.\n");
1491 ath_dbg(common, ATH_DBG_CONFIG,
1492 "Attach a VIF of type: %d\n", vif->type);
1494 /* Set the VIF opmode */
1495 avp->av_opmode = vif->type;
1500 ath9k_do_vif_add_setup(hw, vif);
1502 mutex_unlock(&sc->mutex);
1506 static int ath9k_change_interface(struct ieee80211_hw *hw,
1507 struct ieee80211_vif *vif,
1508 enum nl80211_iftype new_type,
1511 struct ath_softc *sc = hw->priv;
1512 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1515 ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1516 mutex_lock(&sc->mutex);
1518 /* See if new interface type is valid. */
1519 if ((new_type == NL80211_IFTYPE_ADHOC) &&
1521 ath_err(common, "When using ADHOC, it must be the only"
1527 if (ath9k_uses_beacons(new_type) &&
1528 !ath9k_uses_beacons(vif->type)) {
1529 if (sc->nbcnvifs >= ATH_BCBUF) {
1530 ath_err(common, "No beacon slot available\n");
1536 /* Clean up old vif stuff */
1537 if (ath9k_uses_beacons(vif->type))
1538 ath9k_reclaim_beacon(sc, vif);
1540 /* Add new settings */
1541 vif->type = new_type;
1544 ath9k_do_vif_add_setup(hw, vif);
1546 mutex_unlock(&sc->mutex);
1550 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1551 struct ieee80211_vif *vif)
1553 struct ath_softc *sc = hw->priv;
1554 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1556 ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1558 mutex_lock(&sc->mutex);
1562 /* Reclaim beacon resources */
1563 if (ath9k_uses_beacons(vif->type))
1564 ath9k_reclaim_beacon(sc, vif);
1566 ath9k_calculate_summary_state(hw, NULL);
1568 mutex_unlock(&sc->mutex);
1571 static void ath9k_enable_ps(struct ath_softc *sc)
1573 struct ath_hw *ah = sc->sc_ah;
1575 sc->ps_enabled = true;
1576 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1577 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1578 ah->imask |= ATH9K_INT_TIM_TIMER;
1579 ath9k_hw_set_interrupts(ah, ah->imask);
1581 ath9k_hw_setrxabort(ah, 1);
1585 static void ath9k_disable_ps(struct ath_softc *sc)
1587 struct ath_hw *ah = sc->sc_ah;
1589 sc->ps_enabled = false;
1590 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1591 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1592 ath9k_hw_setrxabort(ah, 0);
1593 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1595 PS_WAIT_FOR_PSPOLL_DATA |
1596 PS_WAIT_FOR_TX_ACK);
1597 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1598 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1599 ath9k_hw_set_interrupts(ah, ah->imask);
1605 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1607 struct ath_softc *sc = hw->priv;
1608 struct ath_hw *ah = sc->sc_ah;
1609 struct ath_common *common = ath9k_hw_common(ah);
1610 struct ieee80211_conf *conf = &hw->conf;
1611 bool disable_radio = false;
1613 mutex_lock(&sc->mutex);
1616 * Leave this as the first check because we need to turn on the
1617 * radio if it was disabled before prior to processing the rest
1618 * of the changes. Likewise we must only disable the radio towards
1621 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1622 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1624 ath_radio_enable(sc, hw);
1625 ath_dbg(common, ATH_DBG_CONFIG,
1626 "not-idle: enabling radio\n");
1628 disable_radio = true;
1633 * We just prepare to enable PS. We have to wait until our AP has
1634 * ACK'd our null data frame to disable RX otherwise we'll ignore
1635 * those ACKs and end up retransmitting the same null data frames.
1636 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1638 if (changed & IEEE80211_CONF_CHANGE_PS) {
1639 unsigned long flags;
1640 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1641 if (conf->flags & IEEE80211_CONF_PS)
1642 ath9k_enable_ps(sc);
1644 ath9k_disable_ps(sc);
1645 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1648 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1649 if (conf->flags & IEEE80211_CONF_MONITOR) {
1650 ath_dbg(common, ATH_DBG_CONFIG,
1651 "Monitor mode is enabled\n");
1652 sc->sc_ah->is_monitoring = true;
1654 ath_dbg(common, ATH_DBG_CONFIG,
1655 "Monitor mode is disabled\n");
1656 sc->sc_ah->is_monitoring = false;
1660 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1661 struct ieee80211_channel *curchan = hw->conf.channel;
1662 int pos = curchan->hw_value;
1664 unsigned long flags;
1667 old_pos = ah->curchan - &ah->channels[0];
1669 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1670 sc->sc_flags |= SC_OP_OFFCHANNEL;
1672 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1674 ath_dbg(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1675 curchan->center_freq);
1677 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1678 curchan, conf->channel_type);
1680 /* update survey stats for the old channel before switching */
1681 spin_lock_irqsave(&common->cc_lock, flags);
1682 ath_update_survey_stats(sc);
1683 spin_unlock_irqrestore(&common->cc_lock, flags);
1686 * If the operating channel changes, change the survey in-use flags
1688 * Reset the survey data for the new channel, unless we're switching
1689 * back to the operating channel from an off-channel operation.
1691 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1692 sc->cur_survey != &sc->survey[pos]) {
1695 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1697 sc->cur_survey = &sc->survey[pos];
1699 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1700 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1701 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1702 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1705 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1706 ath_err(common, "Unable to set channel\n");
1707 mutex_unlock(&sc->mutex);
1712 * The most recent snapshot of channel->noisefloor for the old
1713 * channel is only available after the hardware reset. Copy it to
1714 * the survey stats now.
1717 ath_update_survey_nf(sc, old_pos);
1720 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1721 sc->config.txpowlimit = 2 * conf->power_level;
1722 ath9k_ps_wakeup(sc);
1723 ath_update_txpow(sc);
1724 ath9k_ps_restore(sc);
1727 if (disable_radio) {
1728 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1729 ath_radio_disable(sc, hw);
1732 mutex_unlock(&sc->mutex);
1737 #define SUPPORTED_FILTERS \
1738 (FIF_PROMISC_IN_BSS | \
1743 FIF_BCN_PRBRESP_PROMISC | \
1747 /* FIXME: sc->sc_full_reset ? */
1748 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1749 unsigned int changed_flags,
1750 unsigned int *total_flags,
1753 struct ath_softc *sc = hw->priv;
1756 changed_flags &= SUPPORTED_FILTERS;
1757 *total_flags &= SUPPORTED_FILTERS;
1759 sc->rx.rxfilter = *total_flags;
1760 ath9k_ps_wakeup(sc);
1761 rfilt = ath_calcrxfilter(sc);
1762 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1763 ath9k_ps_restore(sc);
1765 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1766 "Set HW RX filter: 0x%x\n", rfilt);
1769 static int ath9k_sta_add(struct ieee80211_hw *hw,
1770 struct ieee80211_vif *vif,
1771 struct ieee80211_sta *sta)
1773 struct ath_softc *sc = hw->priv;
1775 ath_node_attach(sc, sta);
1780 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1781 struct ieee80211_vif *vif,
1782 struct ieee80211_sta *sta)
1784 struct ath_softc *sc = hw->priv;
1786 ath_node_detach(sc, sta);
1791 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1792 const struct ieee80211_tx_queue_params *params)
1794 struct ath_softc *sc = hw->priv;
1795 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1796 struct ath_txq *txq;
1797 struct ath9k_tx_queue_info qi;
1800 if (queue >= WME_NUM_AC)
1803 txq = sc->tx.txq_map[queue];
1805 mutex_lock(&sc->mutex);
1807 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1809 qi.tqi_aifs = params->aifs;
1810 qi.tqi_cwmin = params->cw_min;
1811 qi.tqi_cwmax = params->cw_max;
1812 qi.tqi_burstTime = params->txop;
1814 ath_dbg(common, ATH_DBG_CONFIG,
1815 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1816 queue, txq->axq_qnum, params->aifs, params->cw_min,
1817 params->cw_max, params->txop);
1819 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1821 ath_err(common, "TXQ Update failed\n");
1823 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1824 if (queue == WME_AC_BE && !ret)
1825 ath_beaconq_config(sc);
1827 mutex_unlock(&sc->mutex);
1832 static int ath9k_set_key(struct ieee80211_hw *hw,
1833 enum set_key_cmd cmd,
1834 struct ieee80211_vif *vif,
1835 struct ieee80211_sta *sta,
1836 struct ieee80211_key_conf *key)
1838 struct ath_softc *sc = hw->priv;
1839 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1842 if (ath9k_modparam_nohwcrypt)
1845 mutex_lock(&sc->mutex);
1846 ath9k_ps_wakeup(sc);
1847 ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1851 ret = ath_key_config(common, vif, sta, key);
1853 key->hw_key_idx = ret;
1854 /* push IV and Michael MIC generation to stack */
1855 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1856 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1857 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1858 if (sc->sc_ah->sw_mgmt_crypto &&
1859 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1860 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1865 ath_key_delete(common, key);
1871 ath9k_ps_restore(sc);
1872 mutex_unlock(&sc->mutex);
1877 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1878 struct ieee80211_vif *vif,
1879 struct ieee80211_bss_conf *bss_conf,
1882 struct ath_softc *sc = hw->priv;
1883 struct ath_hw *ah = sc->sc_ah;
1884 struct ath_common *common = ath9k_hw_common(ah);
1885 struct ath_vif *avp = (void *)vif->drv_priv;
1889 mutex_lock(&sc->mutex);
1891 if (changed & BSS_CHANGED_BSSID) {
1893 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1894 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1896 ath9k_hw_write_associd(ah);
1898 /* Set aggregation protection mode parameters */
1899 sc->config.ath_aggr_prot = 0;
1901 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
1902 common->curbssid, common->curaid);
1904 /* need to reconfigure the beacon */
1905 sc->sc_flags &= ~SC_OP_BEACONS ;
1908 /* Enable transmission of beacons (AP, IBSS, MESH) */
1909 if ((changed & BSS_CHANGED_BEACON) ||
1910 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1911 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1912 error = ath_beacon_alloc(sc, vif);
1914 ath_beacon_config(sc, vif);
1917 if (changed & BSS_CHANGED_ERP_SLOT) {
1918 if (bss_conf->use_short_slot)
1922 if (vif->type == NL80211_IFTYPE_AP) {
1924 * Defer update, so that connected stations can adjust
1925 * their settings at the same time.
1926 * See beacon.c for more details
1928 sc->beacon.slottime = slottime;
1929 sc->beacon.updateslot = UPDATE;
1931 ah->slottime = slottime;
1932 ath9k_hw_init_global_settings(ah);
1936 /* Disable transmission of beacons */
1937 if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1938 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1940 if (changed & BSS_CHANGED_BEACON_INT) {
1941 sc->beacon_interval = bss_conf->beacon_int;
1943 * In case of AP mode, the HW TSF has to be reset
1944 * when the beacon interval changes.
1946 if (vif->type == NL80211_IFTYPE_AP) {
1947 sc->sc_flags |= SC_OP_TSF_RESET;
1948 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1949 error = ath_beacon_alloc(sc, vif);
1951 ath_beacon_config(sc, vif);
1953 ath_beacon_config(sc, vif);
1957 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1958 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1959 bss_conf->use_short_preamble);
1960 if (bss_conf->use_short_preamble)
1961 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1963 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1966 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1967 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1968 bss_conf->use_cts_prot);
1969 if (bss_conf->use_cts_prot &&
1970 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1971 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1973 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1976 if (changed & BSS_CHANGED_ASSOC) {
1977 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
1979 ath9k_bss_assoc_info(sc, hw, vif, bss_conf);
1982 mutex_unlock(&sc->mutex);
1985 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1987 struct ath_softc *sc = hw->priv;
1990 mutex_lock(&sc->mutex);
1991 ath9k_ps_wakeup(sc);
1992 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1993 ath9k_ps_restore(sc);
1994 mutex_unlock(&sc->mutex);
1999 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2001 struct ath_softc *sc = hw->priv;
2003 mutex_lock(&sc->mutex);
2004 ath9k_ps_wakeup(sc);
2005 ath9k_hw_settsf64(sc->sc_ah, tsf);
2006 ath9k_ps_restore(sc);
2007 mutex_unlock(&sc->mutex);
2010 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2012 struct ath_softc *sc = hw->priv;
2014 mutex_lock(&sc->mutex);
2016 ath9k_ps_wakeup(sc);
2017 ath9k_hw_reset_tsf(sc->sc_ah);
2018 ath9k_ps_restore(sc);
2020 mutex_unlock(&sc->mutex);
2023 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2024 struct ieee80211_vif *vif,
2025 enum ieee80211_ampdu_mlme_action action,
2026 struct ieee80211_sta *sta,
2027 u16 tid, u16 *ssn, u8 buf_size)
2029 struct ath_softc *sc = hw->priv;
2035 case IEEE80211_AMPDU_RX_START:
2036 if (!(sc->sc_flags & SC_OP_RXAGGR))
2039 case IEEE80211_AMPDU_RX_STOP:
2041 case IEEE80211_AMPDU_TX_START:
2042 if (!(sc->sc_flags & SC_OP_TXAGGR))
2045 ath9k_ps_wakeup(sc);
2046 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2048 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2049 ath9k_ps_restore(sc);
2051 case IEEE80211_AMPDU_TX_STOP:
2052 ath9k_ps_wakeup(sc);
2053 ath_tx_aggr_stop(sc, sta, tid);
2054 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2055 ath9k_ps_restore(sc);
2057 case IEEE80211_AMPDU_TX_OPERATIONAL:
2058 ath9k_ps_wakeup(sc);
2059 ath_tx_aggr_resume(sc, sta, tid);
2060 ath9k_ps_restore(sc);
2063 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2071 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2072 struct survey_info *survey)
2074 struct ath_softc *sc = hw->priv;
2075 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2076 struct ieee80211_supported_band *sband;
2077 struct ieee80211_channel *chan;
2078 unsigned long flags;
2081 spin_lock_irqsave(&common->cc_lock, flags);
2083 ath_update_survey_stats(sc);
2085 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2086 if (sband && idx >= sband->n_channels) {
2087 idx -= sband->n_channels;
2092 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2094 if (!sband || idx >= sband->n_channels) {
2095 spin_unlock_irqrestore(&common->cc_lock, flags);
2099 chan = &sband->channels[idx];
2100 pos = chan->hw_value;
2101 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2102 survey->channel = chan;
2103 spin_unlock_irqrestore(&common->cc_lock, flags);
2108 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2110 struct ath_softc *sc = hw->priv;
2111 struct ath_hw *ah = sc->sc_ah;
2113 mutex_lock(&sc->mutex);
2114 ah->coverage_class = coverage_class;
2115 ath9k_hw_init_global_settings(ah);
2116 mutex_unlock(&sc->mutex);
2119 struct ieee80211_ops ath9k_ops = {
2121 .start = ath9k_start,
2123 .add_interface = ath9k_add_interface,
2124 .change_interface = ath9k_change_interface,
2125 .remove_interface = ath9k_remove_interface,
2126 .config = ath9k_config,
2127 .configure_filter = ath9k_configure_filter,
2128 .sta_add = ath9k_sta_add,
2129 .sta_remove = ath9k_sta_remove,
2130 .conf_tx = ath9k_conf_tx,
2131 .bss_info_changed = ath9k_bss_info_changed,
2132 .set_key = ath9k_set_key,
2133 .get_tsf = ath9k_get_tsf,
2134 .set_tsf = ath9k_set_tsf,
2135 .reset_tsf = ath9k_reset_tsf,
2136 .ampdu_action = ath9k_ampdu_action,
2137 .get_survey = ath9k_get_survey,
2138 .rfkill_poll = ath9k_rfkill_poll_state,
2139 .set_coverage_class = ath9k_set_coverage_class,