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_update_ichannel(sc, hw, channel);
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_wiphy *aphy = hw->priv;
219 struct ath_hw *ah = sc->sc_ah;
220 struct ath_common *common = ath9k_hw_common(ah);
221 struct ieee80211_conf *conf = &common->hw->conf;
222 bool fastcc = true, stopped;
223 struct ieee80211_channel *channel = hw->conf.channel;
224 struct ath9k_hw_cal_data *caldata = NULL;
227 if (sc->sc_flags & SC_OP_INVALID)
230 del_timer_sync(&common->ani.timer);
231 cancel_work_sync(&sc->paprd_work);
232 cancel_work_sync(&sc->hw_check_work);
233 cancel_delayed_work_sync(&sc->tx_complete_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 ath_drain_all_txq(sc, false);
251 stopped = ath_stoprecv(sc);
253 /* XXX: do not flush receive queue here. We don't want
254 * to flush data frames already in queue because of
255 * changing channel. */
257 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
260 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
261 caldata = &aphy->caldata;
263 ath_print(common, ATH_DBG_CONFIG,
264 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
265 sc->sc_ah->curchan->channel,
266 channel->center_freq, conf_is_ht40(conf),
269 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
271 ath_print(common, ATH_DBG_FATAL,
272 "Unable to reset channel (%u MHz), "
274 channel->center_freq, r);
278 if (ath_startrecv(sc) != 0) {
279 ath_print(common, ATH_DBG_FATAL,
280 "Unable to restart recv logic\n");
285 ath_update_txpow(sc);
286 ath9k_hw_set_interrupts(ah, ah->imask);
288 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
289 ath_beacon_config(sc, NULL);
290 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
291 ath_start_ani(common);
295 spin_unlock_bh(&sc->sc_pcu_lock);
297 ath9k_ps_restore(sc);
301 static void ath_paprd_activate(struct ath_softc *sc)
303 struct ath_hw *ah = sc->sc_ah;
304 struct ath9k_hw_cal_data *caldata = ah->caldata;
305 struct ath_common *common = ath9k_hw_common(ah);
308 if (!caldata || !caldata->paprd_done)
312 ar9003_paprd_enable(ah, false);
313 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
314 if (!(common->tx_chainmask & BIT(chain)))
317 ar9003_paprd_populate_single_table(ah, caldata, chain);
320 ar9003_paprd_enable(ah, true);
321 ath9k_ps_restore(sc);
324 void ath_paprd_calibrate(struct work_struct *work)
326 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
327 struct ieee80211_hw *hw = sc->hw;
328 struct ath_hw *ah = sc->sc_ah;
329 struct ieee80211_hdr *hdr;
330 struct sk_buff *skb = NULL;
331 struct ieee80211_tx_info *tx_info;
332 int band = hw->conf.channel->band;
333 struct ieee80211_supported_band *sband = &sc->sbands[band];
334 struct ath_tx_control txctl;
335 struct ath9k_hw_cal_data *caldata = ah->caldata;
336 struct ath_common *common = ath9k_hw_common(ah);
347 skb = alloc_skb(len, GFP_KERNEL);
351 tx_info = IEEE80211_SKB_CB(skb);
354 memset(skb->data, 0, len);
355 hdr = (struct ieee80211_hdr *)skb->data;
356 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
357 hdr->frame_control = cpu_to_le16(ftype);
358 hdr->duration_id = cpu_to_le16(10);
359 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
360 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
361 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
363 memset(&txctl, 0, sizeof(txctl));
364 txctl.txq = sc->tx.txq_map[WME_AC_BE];
367 ar9003_paprd_init_table(ah);
368 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
369 if (!(common->tx_chainmask & BIT(chain)))
373 memset(tx_info, 0, sizeof(*tx_info));
374 tx_info->band = band;
376 for (i = 0; i < 4; i++) {
377 tx_info->control.rates[i].idx = sband->n_bitrates - 1;
378 tx_info->control.rates[i].count = 6;
381 init_completion(&sc->paprd_complete);
382 sc->paprd_pending = true;
383 ar9003_paprd_setup_gain_table(ah, chain);
384 txctl.paprd = BIT(chain);
385 if (ath_tx_start(hw, skb, &txctl) != 0)
388 time_left = wait_for_completion_timeout(&sc->paprd_complete,
389 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
390 sc->paprd_pending = false;
392 ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
393 "Timeout waiting for paprd training on "
399 if (!ar9003_paprd_is_done(ah))
402 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
410 caldata->paprd_done = true;
411 ath_paprd_activate(sc);
415 ath9k_ps_restore(sc);
419 * This routine performs the periodic noise floor calibration function
420 * that is used to adjust and optimize the chip performance. This
421 * takes environmental changes (location, temperature) into account.
422 * When the task is complete, it reschedules itself depending on the
423 * appropriate interval that was calculated.
425 void ath_ani_calibrate(unsigned long data)
427 struct ath_softc *sc = (struct ath_softc *)data;
428 struct ath_hw *ah = sc->sc_ah;
429 struct ath_common *common = ath9k_hw_common(ah);
430 bool longcal = false;
431 bool shortcal = false;
432 bool aniflag = false;
433 unsigned int timestamp = jiffies_to_msecs(jiffies);
434 u32 cal_interval, short_cal_interval, long_cal_interval;
437 if (ah->caldata && ah->caldata->nfcal_interference)
438 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
440 long_cal_interval = ATH_LONG_CALINTERVAL;
442 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
443 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
445 /* Only calibrate if awake */
446 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
451 /* Long calibration runs independently of short calibration. */
452 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
454 ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
455 common->ani.longcal_timer = timestamp;
458 /* Short calibration applies only while caldone is false */
459 if (!common->ani.caldone) {
460 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
462 ath_print(common, ATH_DBG_ANI,
463 "shortcal @%lu\n", jiffies);
464 common->ani.shortcal_timer = timestamp;
465 common->ani.resetcal_timer = timestamp;
468 if ((timestamp - common->ani.resetcal_timer) >=
469 ATH_RESTART_CALINTERVAL) {
470 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
471 if (common->ani.caldone)
472 common->ani.resetcal_timer = timestamp;
476 /* Verify whether we must check ANI */
477 if ((timestamp - common->ani.checkani_timer) >=
478 ah->config.ani_poll_interval) {
480 common->ani.checkani_timer = timestamp;
483 /* Skip all processing if there's nothing to do. */
484 if (longcal || shortcal || aniflag) {
485 /* Call ANI routine if necessary */
487 spin_lock_irqsave(&common->cc_lock, flags);
488 ath9k_hw_ani_monitor(ah, ah->curchan);
489 ath_update_survey_stats(sc);
490 spin_unlock_irqrestore(&common->cc_lock, flags);
493 /* Perform calibration if necessary */
494 if (longcal || shortcal) {
495 common->ani.caldone =
496 ath9k_hw_calibrate(ah,
498 common->rx_chainmask,
503 ath9k_ps_restore(sc);
507 * Set timer interval based on previous results.
508 * The interval must be the shortest necessary to satisfy ANI,
509 * short calibration and long calibration.
511 cal_interval = ATH_LONG_CALINTERVAL;
512 if (sc->sc_ah->config.enable_ani)
513 cal_interval = min(cal_interval,
514 (u32)ah->config.ani_poll_interval);
515 if (!common->ani.caldone)
516 cal_interval = min(cal_interval, (u32)short_cal_interval);
518 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
519 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
520 if (!ah->caldata->paprd_done)
521 ieee80211_queue_work(sc->hw, &sc->paprd_work);
523 ath_paprd_activate(sc);
528 * Update tx/rx chainmask. For legacy association,
529 * hard code chainmask to 1x1, for 11n association, use
530 * the chainmask configuration, for bt coexistence, use
531 * the chainmask configuration even in legacy mode.
533 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
535 struct ath_hw *ah = sc->sc_ah;
536 struct ath_common *common = ath9k_hw_common(ah);
538 if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
539 (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
540 common->tx_chainmask = ah->caps.tx_chainmask;
541 common->rx_chainmask = ah->caps.rx_chainmask;
543 common->tx_chainmask = 1;
544 common->rx_chainmask = 1;
547 ath_print(common, ATH_DBG_CONFIG,
548 "tx chmask: %d, rx chmask: %d\n",
549 common->tx_chainmask,
550 common->rx_chainmask);
553 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
556 struct ath_hw *ah = sc->sc_ah;
557 an = (struct ath_node *)sta->drv_priv;
559 if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM)
560 sc->sc_flags |= SC_OP_ENABLE_APM;
562 if (sc->sc_flags & SC_OP_TXAGGR) {
563 ath_tx_node_init(sc, an);
564 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
565 sta->ht_cap.ampdu_factor);
566 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
570 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
572 struct ath_node *an = (struct ath_node *)sta->drv_priv;
574 if (sc->sc_flags & SC_OP_TXAGGR)
575 ath_tx_node_cleanup(sc, an);
578 void ath_hw_check(struct work_struct *work)
580 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
585 for (i = 0; i < 3; i++) {
586 if (ath9k_hw_check_alive(sc->sc_ah))
594 ath9k_ps_restore(sc);
597 void ath9k_tasklet(unsigned long data)
599 struct ath_softc *sc = (struct ath_softc *)data;
600 struct ath_hw *ah = sc->sc_ah;
601 struct ath_common *common = ath9k_hw_common(ah);
603 u32 status = sc->intrstatus;
608 if (status & ATH9K_INT_FATAL) {
610 ath9k_ps_restore(sc);
614 spin_lock_bh(&sc->sc_pcu_lock);
616 if (!ath9k_hw_check_alive(ah))
617 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
619 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
620 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
623 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
625 if (status & rxmask) {
626 /* Check for high priority Rx first */
627 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
628 (status & ATH9K_INT_RXHP))
629 ath_rx_tasklet(sc, 0, true);
631 ath_rx_tasklet(sc, 0, false);
634 if (status & ATH9K_INT_TX) {
635 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
636 ath_tx_edma_tasklet(sc);
641 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
643 * TSF sync does not look correct; remain awake to sync with
646 ath_print(common, ATH_DBG_PS,
647 "TSFOOR - Sync with next Beacon\n");
648 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
651 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
652 if (status & ATH9K_INT_GENTIMER)
653 ath_gen_timer_isr(sc->sc_ah);
655 /* re-enable hardware interrupt */
656 ath9k_hw_enable_interrupts(ah);
658 spin_unlock_bh(&sc->sc_pcu_lock);
659 ath9k_ps_restore(sc);
662 irqreturn_t ath_isr(int irq, void *dev)
664 #define SCHED_INTR ( \
677 struct ath_softc *sc = dev;
678 struct ath_hw *ah = sc->sc_ah;
679 struct ath_common *common = ath9k_hw_common(ah);
680 enum ath9k_int status;
684 * The hardware is not ready/present, don't
685 * touch anything. Note this can happen early
686 * on if the IRQ is shared.
688 if (sc->sc_flags & SC_OP_INVALID)
692 /* shared irq, not for us */
694 if (!ath9k_hw_intrpend(ah))
698 * Figure out the reason(s) for the interrupt. Note
699 * that the hal returns a pseudo-ISR that may include
700 * bits we haven't explicitly enabled so we mask the
701 * value to insure we only process bits we requested.
703 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
704 status &= ah->imask; /* discard unasked-for bits */
707 * If there are no status bits set, then this interrupt was not
708 * for me (should have been caught above).
713 /* Cache the status */
714 sc->intrstatus = status;
716 if (status & SCHED_INTR)
720 * If a FATAL or RXORN interrupt is received, we have to reset the
723 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
724 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
727 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
728 (status & ATH9K_INT_BB_WATCHDOG)) {
730 spin_lock(&common->cc_lock);
731 ath_hw_cycle_counters_update(common);
732 ar9003_hw_bb_watchdog_dbg_info(ah);
733 spin_unlock(&common->cc_lock);
738 if (status & ATH9K_INT_SWBA)
739 tasklet_schedule(&sc->bcon_tasklet);
741 if (status & ATH9K_INT_TXURN)
742 ath9k_hw_updatetxtriglevel(ah, true);
744 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
745 if (status & ATH9K_INT_RXEOL) {
746 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
747 ath9k_hw_set_interrupts(ah, ah->imask);
751 if (status & ATH9K_INT_MIB) {
753 * Disable interrupts until we service the MIB
754 * interrupt; otherwise it will continue to
757 ath9k_hw_disable_interrupts(ah);
759 * Let the hal handle the event. We assume
760 * it will clear whatever condition caused
763 spin_lock(&common->cc_lock);
764 ath9k_hw_proc_mib_event(ah);
765 spin_unlock(&common->cc_lock);
766 ath9k_hw_enable_interrupts(ah);
769 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
770 if (status & ATH9K_INT_TIM_TIMER) {
771 /* Clear RxAbort bit so that we can
773 ath9k_setpower(sc, ATH9K_PM_AWAKE);
774 ath9k_hw_setrxabort(sc->sc_ah, 0);
775 sc->ps_flags |= PS_WAIT_FOR_BEACON;
780 ath_debug_stat_interrupt(sc, status);
783 /* turn off every interrupt */
784 ath9k_hw_disable_interrupts(ah);
785 tasklet_schedule(&sc->intr_tq);
793 static u32 ath_get_extchanmode(struct ath_softc *sc,
794 struct ieee80211_channel *chan,
795 enum nl80211_channel_type channel_type)
799 switch (chan->band) {
800 case IEEE80211_BAND_2GHZ:
801 switch(channel_type) {
802 case NL80211_CHAN_NO_HT:
803 case NL80211_CHAN_HT20:
804 chanmode = CHANNEL_G_HT20;
806 case NL80211_CHAN_HT40PLUS:
807 chanmode = CHANNEL_G_HT40PLUS;
809 case NL80211_CHAN_HT40MINUS:
810 chanmode = CHANNEL_G_HT40MINUS;
814 case IEEE80211_BAND_5GHZ:
815 switch(channel_type) {
816 case NL80211_CHAN_NO_HT:
817 case NL80211_CHAN_HT20:
818 chanmode = CHANNEL_A_HT20;
820 case NL80211_CHAN_HT40PLUS:
821 chanmode = CHANNEL_A_HT40PLUS;
823 case NL80211_CHAN_HT40MINUS:
824 chanmode = CHANNEL_A_HT40MINUS;
835 static void ath9k_bss_assoc_info(struct ath_softc *sc,
836 struct ieee80211_hw *hw,
837 struct ieee80211_vif *vif,
838 struct ieee80211_bss_conf *bss_conf)
840 struct ath_wiphy *aphy = hw->priv;
841 struct ath_hw *ah = sc->sc_ah;
842 struct ath_common *common = ath9k_hw_common(ah);
844 if (bss_conf->assoc) {
845 ath_print(common, ATH_DBG_CONFIG,
846 "Bss Info ASSOC %d, bssid: %pM\n",
847 bss_conf->aid, common->curbssid);
849 /* New association, store aid */
850 common->curaid = bss_conf->aid;
851 ath9k_hw_write_associd(ah);
854 * Request a re-configuration of Beacon related timers
855 * on the receipt of the first Beacon frame (i.e.,
856 * after time sync with the AP).
858 sc->ps_flags |= PS_BEACON_SYNC;
860 /* Configure the beacon */
861 ath_beacon_config(sc, vif);
863 /* Reset rssi stats */
864 aphy->last_rssi = ATH_RSSI_DUMMY_MARKER;
865 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
867 sc->sc_flags |= SC_OP_ANI_RUN;
868 ath_start_ani(common);
870 ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
873 sc->sc_flags &= ~SC_OP_ANI_RUN;
874 del_timer_sync(&common->ani.timer);
878 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
880 struct ath_hw *ah = sc->sc_ah;
881 struct ath_common *common = ath9k_hw_common(ah);
882 struct ieee80211_channel *channel = hw->conf.channel;
886 spin_lock_bh(&sc->sc_pcu_lock);
888 ath9k_hw_configpcipowersave(ah, 0, 0);
891 ah->curchan = ath_get_curchannel(sc, sc->hw);
893 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
895 ath_print(common, ATH_DBG_FATAL,
896 "Unable to reset channel (%u MHz), "
898 channel->center_freq, r);
901 ath_update_txpow(sc);
902 if (ath_startrecv(sc) != 0) {
903 ath_print(common, ATH_DBG_FATAL,
904 "Unable to restart recv logic\n");
905 spin_unlock_bh(&sc->sc_pcu_lock);
908 if (sc->sc_flags & SC_OP_BEACONS)
909 ath_beacon_config(sc, NULL); /* restart beacons */
911 /* Re-Enable interrupts */
912 ath9k_hw_set_interrupts(ah, ah->imask);
915 ath9k_hw_cfg_output(ah, ah->led_pin,
916 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
917 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
919 ieee80211_wake_queues(hw);
920 spin_unlock_bh(&sc->sc_pcu_lock);
922 ath9k_ps_restore(sc);
925 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
927 struct ath_hw *ah = sc->sc_ah;
928 struct ieee80211_channel *channel = hw->conf.channel;
932 spin_lock_bh(&sc->sc_pcu_lock);
934 ieee80211_stop_queues(hw);
937 * Keep the LED on when the radio is disabled
938 * during idle unassociated state.
941 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
942 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
945 /* Disable interrupts */
946 ath9k_hw_disable_interrupts(ah);
948 ath_drain_all_txq(sc, false); /* clear pending tx frames */
950 ath_stoprecv(sc); /* turn off frame recv */
951 ath_flushrecv(sc); /* flush recv queue */
954 ah->curchan = ath_get_curchannel(sc, hw);
956 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
958 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
959 "Unable to reset channel (%u MHz), "
961 channel->center_freq, r);
964 ath9k_hw_phy_disable(ah);
966 ath9k_hw_configpcipowersave(ah, 1, 1);
968 spin_unlock_bh(&sc->sc_pcu_lock);
969 ath9k_ps_restore(sc);
971 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
974 int ath_reset(struct ath_softc *sc, bool retry_tx)
976 struct ath_hw *ah = sc->sc_ah;
977 struct ath_common *common = ath9k_hw_common(ah);
978 struct ieee80211_hw *hw = sc->hw;
982 del_timer_sync(&common->ani.timer);
984 spin_lock_bh(&sc->sc_pcu_lock);
986 ieee80211_stop_queues(hw);
988 ath9k_hw_disable_interrupts(ah);
989 ath_drain_all_txq(sc, retry_tx);
994 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
996 ath_print(common, ATH_DBG_FATAL,
997 "Unable to reset hardware; reset status %d\n", r);
999 if (ath_startrecv(sc) != 0)
1000 ath_print(common, ATH_DBG_FATAL,
1001 "Unable to start recv logic\n");
1004 * We may be doing a reset in response to a request
1005 * that changes the channel so update any state that
1006 * might change as a result.
1008 ath_update_txpow(sc);
1010 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
1011 ath_beacon_config(sc, NULL); /* restart beacons */
1013 ath9k_hw_set_interrupts(ah, ah->imask);
1017 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1018 if (ATH_TXQ_SETUP(sc, i)) {
1019 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1020 ath_txq_schedule(sc, &sc->tx.txq[i]);
1021 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1026 ieee80211_wake_queues(hw);
1027 spin_unlock_bh(&sc->sc_pcu_lock);
1030 ath_start_ani(common);
1035 /* XXX: Remove me once we don't depend on ath9k_channel for all
1036 * this redundant data */
1037 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1038 struct ath9k_channel *ichan)
1040 struct ieee80211_channel *chan = hw->conf.channel;
1041 struct ieee80211_conf *conf = &hw->conf;
1043 ichan->channel = chan->center_freq;
1046 if (chan->band == IEEE80211_BAND_2GHZ) {
1047 ichan->chanmode = CHANNEL_G;
1048 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1050 ichan->chanmode = CHANNEL_A;
1051 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1054 if (conf_is_ht(conf))
1055 ichan->chanmode = ath_get_extchanmode(sc, chan,
1056 conf->channel_type);
1059 /**********************/
1060 /* mac80211 callbacks */
1061 /**********************/
1063 static int ath9k_start(struct ieee80211_hw *hw)
1065 struct ath_wiphy *aphy = hw->priv;
1066 struct ath_softc *sc = aphy->sc;
1067 struct ath_hw *ah = sc->sc_ah;
1068 struct ath_common *common = ath9k_hw_common(ah);
1069 struct ieee80211_channel *curchan = hw->conf.channel;
1070 struct ath9k_channel *init_channel;
1073 ath_print(common, ATH_DBG_CONFIG,
1074 "Starting driver with initial channel: %d MHz\n",
1075 curchan->center_freq);
1077 mutex_lock(&sc->mutex);
1079 if (ath9k_wiphy_started(sc)) {
1080 if (sc->chan_idx == curchan->hw_value) {
1082 * Already on the operational channel, the new wiphy
1083 * can be marked active.
1085 aphy->state = ATH_WIPHY_ACTIVE;
1086 ieee80211_wake_queues(hw);
1089 * Another wiphy is on another channel, start the new
1090 * wiphy in paused state.
1092 aphy->state = ATH_WIPHY_PAUSED;
1093 ieee80211_stop_queues(hw);
1095 mutex_unlock(&sc->mutex);
1098 aphy->state = ATH_WIPHY_ACTIVE;
1100 /* setup initial channel */
1102 sc->chan_idx = curchan->hw_value;
1104 init_channel = ath_get_curchannel(sc, hw);
1106 /* Reset SERDES registers */
1107 ath9k_hw_configpcipowersave(ah, 0, 0);
1110 * The basic interface to setting the hardware in a good
1111 * state is ``reset''. On return the hardware is known to
1112 * be powered up and with interrupts disabled. This must
1113 * be followed by initialization of the appropriate bits
1114 * and then setup of the interrupt mask.
1116 spin_lock_bh(&sc->sc_pcu_lock);
1117 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1119 ath_print(common, ATH_DBG_FATAL,
1120 "Unable to reset hardware; reset status %d "
1121 "(freq %u MHz)\n", r,
1122 curchan->center_freq);
1123 spin_unlock_bh(&sc->sc_pcu_lock);
1128 * This is needed only to setup initial state
1129 * but it's best done after a reset.
1131 ath_update_txpow(sc);
1134 * Setup the hardware after reset:
1135 * The receive engine is set going.
1136 * Frame transmit is handled entirely
1137 * in the frame output path; there's nothing to do
1138 * here except setup the interrupt mask.
1140 if (ath_startrecv(sc) != 0) {
1141 ath_print(common, ATH_DBG_FATAL,
1142 "Unable to start recv logic\n");
1144 spin_unlock_bh(&sc->sc_pcu_lock);
1147 spin_unlock_bh(&sc->sc_pcu_lock);
1149 /* Setup our intr mask. */
1150 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1151 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1154 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1155 ah->imask |= ATH9K_INT_RXHP |
1157 ATH9K_INT_BB_WATCHDOG;
1159 ah->imask |= ATH9K_INT_RX;
1161 ah->imask |= ATH9K_INT_GTT;
1163 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1164 ah->imask |= ATH9K_INT_CST;
1166 sc->sc_flags &= ~SC_OP_INVALID;
1167 sc->sc_ah->is_monitoring = false;
1169 /* Disable BMISS interrupt when we're not associated */
1170 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1171 ath9k_hw_set_interrupts(ah, ah->imask);
1173 ieee80211_wake_queues(hw);
1175 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1177 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1178 !ah->btcoex_hw.enabled) {
1179 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1180 AR_STOMP_LOW_WLAN_WGHT);
1181 ath9k_hw_btcoex_enable(ah);
1183 if (common->bus_ops->bt_coex_prep)
1184 common->bus_ops->bt_coex_prep(common);
1185 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1186 ath9k_btcoex_timer_resume(sc);
1189 pm_qos_update_request(&sc->pm_qos_req, 55);
1192 mutex_unlock(&sc->mutex);
1197 static int ath9k_tx(struct ieee80211_hw *hw,
1198 struct sk_buff *skb)
1200 struct ath_wiphy *aphy = hw->priv;
1201 struct ath_softc *sc = aphy->sc;
1202 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1203 struct ath_tx_control txctl;
1204 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1206 if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1207 ath_print(common, ATH_DBG_XMIT,
1208 "ath9k: %s: TX in unexpected wiphy state "
1209 "%d\n", wiphy_name(hw->wiphy), aphy->state);
1213 if (sc->ps_enabled) {
1215 * mac80211 does not set PM field for normal data frames, so we
1216 * need to update that based on the current PS mode.
1218 if (ieee80211_is_data(hdr->frame_control) &&
1219 !ieee80211_is_nullfunc(hdr->frame_control) &&
1220 !ieee80211_has_pm(hdr->frame_control)) {
1221 ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
1222 "while in PS mode\n");
1223 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1227 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1229 * We are using PS-Poll and mac80211 can request TX while in
1230 * power save mode. Need to wake up hardware for the TX to be
1231 * completed and if needed, also for RX of buffered frames.
1233 ath9k_ps_wakeup(sc);
1234 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1235 ath9k_hw_setrxabort(sc->sc_ah, 0);
1236 if (ieee80211_is_pspoll(hdr->frame_control)) {
1237 ath_print(common, ATH_DBG_PS,
1238 "Sending PS-Poll to pick a buffered frame\n");
1239 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1241 ath_print(common, ATH_DBG_PS,
1242 "Wake up to complete TX\n");
1243 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1246 * The actual restore operation will happen only after
1247 * the sc_flags bit is cleared. We are just dropping
1248 * the ps_usecount here.
1250 ath9k_ps_restore(sc);
1253 memset(&txctl, 0, sizeof(struct ath_tx_control));
1254 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1256 ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1258 if (ath_tx_start(hw, skb, &txctl) != 0) {
1259 ath_print(common, ATH_DBG_XMIT, "TX failed\n");
1265 dev_kfree_skb_any(skb);
1269 static void ath9k_stop(struct ieee80211_hw *hw)
1271 struct ath_wiphy *aphy = hw->priv;
1272 struct ath_softc *sc = aphy->sc;
1273 struct ath_hw *ah = sc->sc_ah;
1274 struct ath_common *common = ath9k_hw_common(ah);
1277 mutex_lock(&sc->mutex);
1279 aphy->state = ATH_WIPHY_INACTIVE;
1282 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1284 cancel_delayed_work_sync(&sc->tx_complete_work);
1285 cancel_work_sync(&sc->paprd_work);
1286 cancel_work_sync(&sc->hw_check_work);
1288 for (i = 0; i < sc->num_sec_wiphy; i++) {
1289 if (sc->sec_wiphy[i])
1293 if (i == sc->num_sec_wiphy) {
1294 cancel_delayed_work_sync(&sc->wiphy_work);
1295 cancel_work_sync(&sc->chan_work);
1298 if (sc->sc_flags & SC_OP_INVALID) {
1299 ath_print(common, ATH_DBG_ANY, "Device not present\n");
1300 mutex_unlock(&sc->mutex);
1304 if (ath9k_wiphy_started(sc)) {
1305 mutex_unlock(&sc->mutex);
1306 return; /* another wiphy still in use */
1309 /* Ensure HW is awake when we try to shut it down. */
1310 ath9k_ps_wakeup(sc);
1312 if (ah->btcoex_hw.enabled) {
1313 ath9k_hw_btcoex_disable(ah);
1314 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1315 ath9k_btcoex_timer_pause(sc);
1318 spin_lock_bh(&sc->sc_pcu_lock);
1320 /* make sure h/w will not generate any interrupt
1321 * before setting the invalid flag. */
1322 ath9k_hw_disable_interrupts(ah);
1324 if (!(sc->sc_flags & SC_OP_INVALID)) {
1325 ath_drain_all_txq(sc, false);
1327 ath9k_hw_phy_disable(ah);
1329 sc->rx.rxlink = NULL;
1331 /* disable HAL and put h/w to sleep */
1332 ath9k_hw_disable(ah);
1333 ath9k_hw_configpcipowersave(ah, 1, 1);
1335 spin_unlock_bh(&sc->sc_pcu_lock);
1337 ath9k_ps_restore(sc);
1339 /* Finally, put the chip in FULL SLEEP mode */
1340 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
1342 sc->sc_flags |= SC_OP_INVALID;
1344 pm_qos_update_request(&sc->pm_qos_req, PM_QOS_DEFAULT_VALUE);
1346 mutex_unlock(&sc->mutex);
1348 ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
1351 static int ath9k_add_interface(struct ieee80211_hw *hw,
1352 struct ieee80211_vif *vif)
1354 struct ath_wiphy *aphy = hw->priv;
1355 struct ath_softc *sc = aphy->sc;
1356 struct ath_hw *ah = sc->sc_ah;
1357 struct ath_common *common = ath9k_hw_common(ah);
1358 struct ath_vif *avp = (void *)vif->drv_priv;
1359 enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1362 mutex_lock(&sc->mutex);
1364 switch (vif->type) {
1365 case NL80211_IFTYPE_STATION:
1366 ic_opmode = NL80211_IFTYPE_STATION;
1368 case NL80211_IFTYPE_WDS:
1369 ic_opmode = NL80211_IFTYPE_WDS;
1371 case NL80211_IFTYPE_ADHOC:
1372 case NL80211_IFTYPE_AP:
1373 case NL80211_IFTYPE_MESH_POINT:
1374 if (sc->nbcnvifs >= ATH_BCBUF) {
1378 ic_opmode = vif->type;
1381 ath_print(common, ATH_DBG_FATAL,
1382 "Interface type %d not yet supported\n", vif->type);
1387 ath_print(common, ATH_DBG_CONFIG,
1388 "Attach a VIF of type: %d\n", ic_opmode);
1390 /* Set the VIF opmode */
1391 avp->av_opmode = ic_opmode;
1396 ath9k_set_bssid_mask(hw, vif);
1399 goto out; /* skip global settings for secondary vif */
1401 if (ic_opmode == NL80211_IFTYPE_AP) {
1402 ath9k_hw_set_tsfadjust(ah, 1);
1403 sc->sc_flags |= SC_OP_TSF_RESET;
1406 /* Set the device opmode */
1407 ah->opmode = ic_opmode;
1410 * Enable MIB interrupts when there are hardware phy counters.
1411 * Note we only do this (at the moment) for station mode.
1413 if ((vif->type == NL80211_IFTYPE_STATION) ||
1414 (vif->type == NL80211_IFTYPE_ADHOC) ||
1415 (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1416 if (ah->config.enable_ani)
1417 ah->imask |= ATH9K_INT_MIB;
1418 ah->imask |= ATH9K_INT_TSFOOR;
1421 ath9k_hw_set_interrupts(ah, ah->imask);
1423 if (vif->type == NL80211_IFTYPE_AP ||
1424 vif->type == NL80211_IFTYPE_ADHOC) {
1425 sc->sc_flags |= SC_OP_ANI_RUN;
1426 ath_start_ani(common);
1430 mutex_unlock(&sc->mutex);
1434 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1435 struct ieee80211_vif *vif)
1437 struct ath_wiphy *aphy = hw->priv;
1438 struct ath_softc *sc = aphy->sc;
1439 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1440 struct ath_vif *avp = (void *)vif->drv_priv;
1441 bool bs_valid = false;
1444 ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
1446 mutex_lock(&sc->mutex);
1449 sc->sc_flags &= ~SC_OP_ANI_RUN;
1450 del_timer_sync(&common->ani.timer);
1452 /* Reclaim beacon resources */
1453 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1454 (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1455 (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
1456 ath9k_ps_wakeup(sc);
1457 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1458 ath9k_ps_restore(sc);
1461 ath_beacon_return(sc, avp);
1462 sc->sc_flags &= ~SC_OP_BEACONS;
1464 for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
1465 if (sc->beacon.bslot[i] == vif) {
1466 printk(KERN_DEBUG "%s: vif had allocated beacon "
1467 "slot\n", __func__);
1468 sc->beacon.bslot[i] = NULL;
1469 sc->beacon.bslot_aphy[i] = NULL;
1470 } else if (sc->beacon.bslot[i])
1473 if (!bs_valid && (sc->sc_ah->imask & ATH9K_INT_SWBA)) {
1474 /* Disable SWBA interrupt */
1475 sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
1476 ath9k_ps_wakeup(sc);
1477 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1478 ath9k_ps_restore(sc);
1483 mutex_unlock(&sc->mutex);
1486 static void ath9k_enable_ps(struct ath_softc *sc)
1488 struct ath_hw *ah = sc->sc_ah;
1490 sc->ps_enabled = true;
1491 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1492 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1493 ah->imask |= ATH9K_INT_TIM_TIMER;
1494 ath9k_hw_set_interrupts(ah, ah->imask);
1496 ath9k_hw_setrxabort(ah, 1);
1500 static void ath9k_disable_ps(struct ath_softc *sc)
1502 struct ath_hw *ah = sc->sc_ah;
1504 sc->ps_enabled = false;
1505 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1506 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1507 ath9k_hw_setrxabort(ah, 0);
1508 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1510 PS_WAIT_FOR_PSPOLL_DATA |
1511 PS_WAIT_FOR_TX_ACK);
1512 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1513 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1514 ath9k_hw_set_interrupts(ah, ah->imask);
1520 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1522 struct ath_wiphy *aphy = hw->priv;
1523 struct ath_softc *sc = aphy->sc;
1524 struct ath_hw *ah = sc->sc_ah;
1525 struct ath_common *common = ath9k_hw_common(ah);
1526 struct ieee80211_conf *conf = &hw->conf;
1529 mutex_lock(&sc->mutex);
1532 * Leave this as the first check because we need to turn on the
1533 * radio if it was disabled before prior to processing the rest
1534 * of the changes. Likewise we must only disable the radio towards
1537 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1539 bool all_wiphys_idle;
1540 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1542 spin_lock_bh(&sc->wiphy_lock);
1543 all_wiphys_idle = ath9k_all_wiphys_idle(sc);
1544 ath9k_set_wiphy_idle(aphy, idle);
1546 enable_radio = (!idle && all_wiphys_idle);
1549 * After we unlock here its possible another wiphy
1550 * can be re-renabled so to account for that we will
1551 * only disable the radio toward the end of this routine
1552 * if by then all wiphys are still idle.
1554 spin_unlock_bh(&sc->wiphy_lock);
1557 sc->ps_idle = false;
1558 ath_radio_enable(sc, hw);
1559 ath_print(common, ATH_DBG_CONFIG,
1560 "not-idle: enabling radio\n");
1565 * We just prepare to enable PS. We have to wait until our AP has
1566 * ACK'd our null data frame to disable RX otherwise we'll ignore
1567 * those ACKs and end up retransmitting the same null data frames.
1568 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1570 if (changed & IEEE80211_CONF_CHANGE_PS) {
1571 unsigned long flags;
1572 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1573 if (conf->flags & IEEE80211_CONF_PS)
1574 ath9k_enable_ps(sc);
1576 ath9k_disable_ps(sc);
1577 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1580 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1581 if (conf->flags & IEEE80211_CONF_MONITOR) {
1582 ath_print(common, ATH_DBG_CONFIG,
1583 "Monitor mode is enabled\n");
1584 sc->sc_ah->is_monitoring = true;
1586 ath_print(common, ATH_DBG_CONFIG,
1587 "Monitor mode is disabled\n");
1588 sc->sc_ah->is_monitoring = false;
1592 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1593 struct ieee80211_channel *curchan = hw->conf.channel;
1594 int pos = curchan->hw_value;
1596 unsigned long flags;
1599 old_pos = ah->curchan - &ah->channels[0];
1601 aphy->chan_idx = pos;
1602 aphy->chan_is_ht = conf_is_ht(conf);
1603 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1604 sc->sc_flags |= SC_OP_OFFCHANNEL;
1606 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1608 if (aphy->state == ATH_WIPHY_SCAN ||
1609 aphy->state == ATH_WIPHY_ACTIVE)
1610 ath9k_wiphy_pause_all_forced(sc, aphy);
1613 * Do not change operational channel based on a paused
1616 goto skip_chan_change;
1619 ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1620 curchan->center_freq);
1622 /* XXX: remove me eventualy */
1623 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1625 ath_update_chainmask(sc, conf_is_ht(conf));
1627 /* update survey stats for the old channel before switching */
1628 spin_lock_irqsave(&common->cc_lock, flags);
1629 ath_update_survey_stats(sc);
1630 spin_unlock_irqrestore(&common->cc_lock, flags);
1633 * If the operating channel changes, change the survey in-use flags
1635 * Reset the survey data for the new channel, unless we're switching
1636 * back to the operating channel from an off-channel operation.
1638 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1639 sc->cur_survey != &sc->survey[pos]) {
1642 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1644 sc->cur_survey = &sc->survey[pos];
1646 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1647 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1648 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1649 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1652 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1653 ath_print(common, ATH_DBG_FATAL,
1654 "Unable to set channel\n");
1655 mutex_unlock(&sc->mutex);
1660 * The most recent snapshot of channel->noisefloor for the old
1661 * channel is only available after the hardware reset. Copy it to
1662 * the survey stats now.
1665 ath_update_survey_nf(sc, old_pos);
1669 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1670 sc->config.txpowlimit = 2 * conf->power_level;
1671 ath_update_txpow(sc);
1674 spin_lock_bh(&sc->wiphy_lock);
1675 disable_radio = ath9k_all_wiphys_idle(sc);
1676 spin_unlock_bh(&sc->wiphy_lock);
1678 if (disable_radio) {
1679 ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1681 ath_radio_disable(sc, hw);
1684 mutex_unlock(&sc->mutex);
1689 #define SUPPORTED_FILTERS \
1690 (FIF_PROMISC_IN_BSS | \
1695 FIF_BCN_PRBRESP_PROMISC | \
1699 /* FIXME: sc->sc_full_reset ? */
1700 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1701 unsigned int changed_flags,
1702 unsigned int *total_flags,
1705 struct ath_wiphy *aphy = hw->priv;
1706 struct ath_softc *sc = aphy->sc;
1709 changed_flags &= SUPPORTED_FILTERS;
1710 *total_flags &= SUPPORTED_FILTERS;
1712 sc->rx.rxfilter = *total_flags;
1713 ath9k_ps_wakeup(sc);
1714 rfilt = ath_calcrxfilter(sc);
1715 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1716 ath9k_ps_restore(sc);
1718 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1719 "Set HW RX filter: 0x%x\n", rfilt);
1722 static int ath9k_sta_add(struct ieee80211_hw *hw,
1723 struct ieee80211_vif *vif,
1724 struct ieee80211_sta *sta)
1726 struct ath_wiphy *aphy = hw->priv;
1727 struct ath_softc *sc = aphy->sc;
1729 ath_node_attach(sc, sta);
1734 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1735 struct ieee80211_vif *vif,
1736 struct ieee80211_sta *sta)
1738 struct ath_wiphy *aphy = hw->priv;
1739 struct ath_softc *sc = aphy->sc;
1741 ath_node_detach(sc, sta);
1746 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1747 const struct ieee80211_tx_queue_params *params)
1749 struct ath_wiphy *aphy = hw->priv;
1750 struct ath_softc *sc = aphy->sc;
1751 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1752 struct ath_txq *txq;
1753 struct ath9k_tx_queue_info qi;
1756 if (queue >= WME_NUM_AC)
1759 txq = sc->tx.txq_map[queue];
1761 mutex_lock(&sc->mutex);
1763 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1765 qi.tqi_aifs = params->aifs;
1766 qi.tqi_cwmin = params->cw_min;
1767 qi.tqi_cwmax = params->cw_max;
1768 qi.tqi_burstTime = params->txop;
1770 ath_print(common, ATH_DBG_CONFIG,
1771 "Configure tx [queue/halq] [%d/%d], "
1772 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1773 queue, txq->axq_qnum, params->aifs, params->cw_min,
1774 params->cw_max, params->txop);
1776 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1778 ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
1780 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1781 if (queue == WME_AC_BE && !ret)
1782 ath_beaconq_config(sc);
1784 mutex_unlock(&sc->mutex);
1789 static int ath9k_set_key(struct ieee80211_hw *hw,
1790 enum set_key_cmd cmd,
1791 struct ieee80211_vif *vif,
1792 struct ieee80211_sta *sta,
1793 struct ieee80211_key_conf *key)
1795 struct ath_wiphy *aphy = hw->priv;
1796 struct ath_softc *sc = aphy->sc;
1797 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1800 if (modparam_nohwcrypt)
1803 mutex_lock(&sc->mutex);
1804 ath9k_ps_wakeup(sc);
1805 ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
1809 ret = ath_key_config(common, vif, sta, key);
1811 key->hw_key_idx = ret;
1812 /* push IV and Michael MIC generation to stack */
1813 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1814 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1815 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1816 if (sc->sc_ah->sw_mgmt_crypto &&
1817 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1818 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1823 ath_key_delete(common, key);
1829 ath9k_ps_restore(sc);
1830 mutex_unlock(&sc->mutex);
1835 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1836 struct ieee80211_vif *vif,
1837 struct ieee80211_bss_conf *bss_conf,
1840 struct ath_wiphy *aphy = hw->priv;
1841 struct ath_softc *sc = aphy->sc;
1842 struct ath_hw *ah = sc->sc_ah;
1843 struct ath_common *common = ath9k_hw_common(ah);
1844 struct ath_vif *avp = (void *)vif->drv_priv;
1848 mutex_lock(&sc->mutex);
1850 if (changed & BSS_CHANGED_BSSID) {
1852 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1853 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1855 ath9k_hw_write_associd(ah);
1857 /* Set aggregation protection mode parameters */
1858 sc->config.ath_aggr_prot = 0;
1860 /* Only legacy IBSS for now */
1861 if (vif->type == NL80211_IFTYPE_ADHOC)
1862 ath_update_chainmask(sc, 0);
1864 ath_print(common, ATH_DBG_CONFIG,
1865 "BSSID: %pM aid: 0x%x\n",
1866 common->curbssid, common->curaid);
1868 /* need to reconfigure the beacon */
1869 sc->sc_flags &= ~SC_OP_BEACONS ;
1872 /* Enable transmission of beacons (AP, IBSS, MESH) */
1873 if ((changed & BSS_CHANGED_BEACON) ||
1874 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1875 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1876 error = ath_beacon_alloc(aphy, vif);
1878 ath_beacon_config(sc, vif);
1881 if (changed & BSS_CHANGED_ERP_SLOT) {
1882 if (bss_conf->use_short_slot)
1886 if (vif->type == NL80211_IFTYPE_AP) {
1888 * Defer update, so that connected stations can adjust
1889 * their settings at the same time.
1890 * See beacon.c for more details
1892 sc->beacon.slottime = slottime;
1893 sc->beacon.updateslot = UPDATE;
1895 ah->slottime = slottime;
1896 ath9k_hw_init_global_settings(ah);
1900 /* Disable transmission of beacons */
1901 if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1902 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1904 if (changed & BSS_CHANGED_BEACON_INT) {
1905 sc->beacon_interval = bss_conf->beacon_int;
1907 * In case of AP mode, the HW TSF has to be reset
1908 * when the beacon interval changes.
1910 if (vif->type == NL80211_IFTYPE_AP) {
1911 sc->sc_flags |= SC_OP_TSF_RESET;
1912 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1913 error = ath_beacon_alloc(aphy, vif);
1915 ath_beacon_config(sc, vif);
1917 ath_beacon_config(sc, vif);
1921 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1922 ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1923 bss_conf->use_short_preamble);
1924 if (bss_conf->use_short_preamble)
1925 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1927 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1930 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1931 ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1932 bss_conf->use_cts_prot);
1933 if (bss_conf->use_cts_prot &&
1934 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1935 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1937 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1940 if (changed & BSS_CHANGED_ASSOC) {
1941 ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
1943 ath9k_bss_assoc_info(sc, hw, vif, bss_conf);
1946 mutex_unlock(&sc->mutex);
1949 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1952 struct ath_wiphy *aphy = hw->priv;
1953 struct ath_softc *sc = aphy->sc;
1955 mutex_lock(&sc->mutex);
1956 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1957 mutex_unlock(&sc->mutex);
1962 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
1964 struct ath_wiphy *aphy = hw->priv;
1965 struct ath_softc *sc = aphy->sc;
1967 mutex_lock(&sc->mutex);
1968 ath9k_hw_settsf64(sc->sc_ah, tsf);
1969 mutex_unlock(&sc->mutex);
1972 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1974 struct ath_wiphy *aphy = hw->priv;
1975 struct ath_softc *sc = aphy->sc;
1977 mutex_lock(&sc->mutex);
1979 ath9k_ps_wakeup(sc);
1980 ath9k_hw_reset_tsf(sc->sc_ah);
1981 ath9k_ps_restore(sc);
1983 mutex_unlock(&sc->mutex);
1986 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1987 struct ieee80211_vif *vif,
1988 enum ieee80211_ampdu_mlme_action action,
1989 struct ieee80211_sta *sta,
1992 struct ath_wiphy *aphy = hw->priv;
1993 struct ath_softc *sc = aphy->sc;
1999 case IEEE80211_AMPDU_RX_START:
2000 if (!(sc->sc_flags & SC_OP_RXAGGR))
2003 case IEEE80211_AMPDU_RX_STOP:
2005 case IEEE80211_AMPDU_TX_START:
2006 if (!(sc->sc_flags & SC_OP_TXAGGR))
2009 ath9k_ps_wakeup(sc);
2010 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2012 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2013 ath9k_ps_restore(sc);
2015 case IEEE80211_AMPDU_TX_STOP:
2016 ath9k_ps_wakeup(sc);
2017 ath_tx_aggr_stop(sc, sta, tid);
2018 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2019 ath9k_ps_restore(sc);
2021 case IEEE80211_AMPDU_TX_OPERATIONAL:
2022 ath9k_ps_wakeup(sc);
2023 ath_tx_aggr_resume(sc, sta, tid);
2024 ath9k_ps_restore(sc);
2027 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
2028 "Unknown AMPDU action\n");
2036 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2037 struct survey_info *survey)
2039 struct ath_wiphy *aphy = hw->priv;
2040 struct ath_softc *sc = aphy->sc;
2041 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2042 struct ieee80211_supported_band *sband;
2043 struct ieee80211_channel *chan;
2044 unsigned long flags;
2047 spin_lock_irqsave(&common->cc_lock, flags);
2049 ath_update_survey_stats(sc);
2051 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2052 if (sband && idx >= sband->n_channels) {
2053 idx -= sband->n_channels;
2058 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2060 if (!sband || idx >= sband->n_channels) {
2061 spin_unlock_irqrestore(&common->cc_lock, flags);
2065 chan = &sband->channels[idx];
2066 pos = chan->hw_value;
2067 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2068 survey->channel = chan;
2069 spin_unlock_irqrestore(&common->cc_lock, flags);
2074 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2076 struct ath_wiphy *aphy = hw->priv;
2077 struct ath_softc *sc = aphy->sc;
2079 mutex_lock(&sc->mutex);
2080 if (ath9k_wiphy_scanning(sc)) {
2082 * There is a race here in mac80211 but fixing it requires
2083 * we revisit how we handle the scan complete callback.
2084 * After mac80211 fixes we will not have configured hardware
2085 * to the home channel nor would we have configured the RX
2088 mutex_unlock(&sc->mutex);
2092 aphy->state = ATH_WIPHY_SCAN;
2093 ath9k_wiphy_pause_all_forced(sc, aphy);
2094 mutex_unlock(&sc->mutex);
2098 * XXX: this requires a revisit after the driver
2099 * scan_complete gets moved to another place/removed in mac80211.
2101 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2103 struct ath_wiphy *aphy = hw->priv;
2104 struct ath_softc *sc = aphy->sc;
2106 mutex_lock(&sc->mutex);
2107 aphy->state = ATH_WIPHY_ACTIVE;
2108 mutex_unlock(&sc->mutex);
2111 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2113 struct ath_wiphy *aphy = hw->priv;
2114 struct ath_softc *sc = aphy->sc;
2115 struct ath_hw *ah = sc->sc_ah;
2117 mutex_lock(&sc->mutex);
2118 ah->coverage_class = coverage_class;
2119 ath9k_hw_init_global_settings(ah);
2120 mutex_unlock(&sc->mutex);
2123 struct ieee80211_ops ath9k_ops = {
2125 .start = ath9k_start,
2127 .add_interface = ath9k_add_interface,
2128 .remove_interface = ath9k_remove_interface,
2129 .config = ath9k_config,
2130 .configure_filter = ath9k_configure_filter,
2131 .sta_add = ath9k_sta_add,
2132 .sta_remove = ath9k_sta_remove,
2133 .conf_tx = ath9k_conf_tx,
2134 .bss_info_changed = ath9k_bss_info_changed,
2135 .set_key = ath9k_set_key,
2136 .get_tsf = ath9k_get_tsf,
2137 .set_tsf = ath9k_set_tsf,
2138 .reset_tsf = ath9k_reset_tsf,
2139 .ampdu_action = ath9k_ampdu_action,
2140 .get_survey = ath9k_get_survey,
2141 .sw_scan_start = ath9k_sw_scan_start,
2142 .sw_scan_complete = ath9k_sw_scan_complete,
2143 .rfkill_poll = ath9k_rfkill_poll_state,
2144 .set_coverage_class = ath9k_set_coverage_class,