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);
97 spin_lock_irqsave(&sc->sc_pm_lock, flags);
98 if (++sc->ps_usecount != 1)
101 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
104 * While the hardware is asleep, the cycle counters contain no
105 * useful data. Better clear them now so that they don't mess up
106 * survey data results.
108 spin_lock(&common->cc_lock);
109 ath_hw_cycle_counters_update(common);
110 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
111 spin_unlock(&common->cc_lock);
114 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
117 void ath9k_ps_restore(struct ath_softc *sc)
119 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
122 spin_lock_irqsave(&sc->sc_pm_lock, flags);
123 if (--sc->ps_usecount != 0)
126 spin_lock(&common->cc_lock);
127 ath_hw_cycle_counters_update(common);
128 spin_unlock(&common->cc_lock);
131 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
132 else if (sc->ps_enabled &&
133 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
135 PS_WAIT_FOR_PSPOLL_DATA |
136 PS_WAIT_FOR_TX_ACK)))
137 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
140 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
143 static void ath_start_ani(struct ath_common *common)
145 struct ath_hw *ah = common->ah;
146 unsigned long timestamp = jiffies_to_msecs(jiffies);
147 struct ath_softc *sc = (struct ath_softc *) common->priv;
149 if (!(sc->sc_flags & SC_OP_ANI_RUN))
152 if (sc->sc_flags & SC_OP_OFFCHANNEL)
155 common->ani.longcal_timer = timestamp;
156 common->ani.shortcal_timer = timestamp;
157 common->ani.checkani_timer = timestamp;
159 mod_timer(&common->ani.timer,
161 msecs_to_jiffies((u32)ah->config.ani_poll_interval));
164 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
166 struct ath_hw *ah = sc->sc_ah;
167 struct ath9k_channel *chan = &ah->channels[channel];
168 struct survey_info *survey = &sc->survey[channel];
170 if (chan->noisefloor) {
171 survey->filled |= SURVEY_INFO_NOISE_DBM;
172 survey->noise = chan->noisefloor;
176 static void ath_update_survey_stats(struct ath_softc *sc)
178 struct ath_hw *ah = sc->sc_ah;
179 struct ath_common *common = ath9k_hw_common(ah);
180 int pos = ah->curchan - &ah->channels[0];
181 struct survey_info *survey = &sc->survey[pos];
182 struct ath_cycle_counters *cc = &common->cc_survey;
183 unsigned int div = common->clockrate * 1000;
188 if (ah->power_mode == ATH9K_PM_AWAKE)
189 ath_hw_cycle_counters_update(common);
191 if (cc->cycles > 0) {
192 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
193 SURVEY_INFO_CHANNEL_TIME_BUSY |
194 SURVEY_INFO_CHANNEL_TIME_RX |
195 SURVEY_INFO_CHANNEL_TIME_TX;
196 survey->channel_time += cc->cycles / div;
197 survey->channel_time_busy += cc->rx_busy / div;
198 survey->channel_time_rx += cc->rx_frame / div;
199 survey->channel_time_tx += cc->tx_frame / div;
201 memset(cc, 0, sizeof(*cc));
203 ath_update_survey_nf(sc, pos);
207 * Set/change channels. If the channel is really being changed, it's done
208 * by reseting the chip. To accomplish this we must first cleanup any pending
209 * DMA, then restart stuff.
211 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
212 struct ath9k_channel *hchan)
214 struct ath_wiphy *aphy = hw->priv;
215 struct ath_hw *ah = sc->sc_ah;
216 struct ath_common *common = ath9k_hw_common(ah);
217 struct ieee80211_conf *conf = &common->hw->conf;
218 bool fastcc = true, stopped;
219 struct ieee80211_channel *channel = hw->conf.channel;
220 struct ath9k_hw_cal_data *caldata = NULL;
223 if (sc->sc_flags & SC_OP_INVALID)
226 del_timer_sync(&common->ani.timer);
227 cancel_work_sync(&sc->paprd_work);
228 cancel_work_sync(&sc->hw_check_work);
229 cancel_delayed_work_sync(&sc->tx_complete_work);
233 spin_lock_bh(&sc->sc_pcu_lock);
236 * This is only performed if the channel settings have
239 * To switch channels clear any pending DMA operations;
240 * wait long enough for the RX fifo to drain, reset the
241 * hardware at the new frequency, and then re-enable
242 * the relevant bits of the h/w.
244 ath9k_hw_disable_interrupts(ah);
245 ath_drain_all_txq(sc, false);
247 stopped = ath_stoprecv(sc);
249 /* XXX: do not flush receive queue here. We don't want
250 * to flush data frames already in queue because of
251 * changing channel. */
253 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
256 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
257 caldata = &aphy->caldata;
259 ath_print(common, ATH_DBG_CONFIG,
260 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
261 sc->sc_ah->curchan->channel,
262 channel->center_freq, conf_is_ht40(conf),
265 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
267 ath_print(common, ATH_DBG_FATAL,
268 "Unable to reset channel (%u MHz), "
270 channel->center_freq, r);
274 if (ath_startrecv(sc) != 0) {
275 ath_print(common, ATH_DBG_FATAL,
276 "Unable to restart recv logic\n");
281 ath_update_txpow(sc);
282 ath9k_hw_set_interrupts(ah, ah->imask);
284 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
285 ath_beacon_config(sc, NULL);
286 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
287 ath_start_ani(common);
291 spin_unlock_bh(&sc->sc_pcu_lock);
293 ath9k_ps_restore(sc);
297 static void ath_paprd_activate(struct ath_softc *sc)
299 struct ath_hw *ah = sc->sc_ah;
300 struct ath9k_hw_cal_data *caldata = ah->caldata;
301 struct ath_common *common = ath9k_hw_common(ah);
304 if (!caldata || !caldata->paprd_done)
308 ar9003_paprd_enable(ah, false);
309 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
310 if (!(common->tx_chainmask & BIT(chain)))
313 ar9003_paprd_populate_single_table(ah, caldata, chain);
316 ar9003_paprd_enable(ah, true);
317 ath9k_ps_restore(sc);
320 void ath_paprd_calibrate(struct work_struct *work)
322 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
323 struct ieee80211_hw *hw = sc->hw;
324 struct ath_hw *ah = sc->sc_ah;
325 struct ieee80211_hdr *hdr;
326 struct sk_buff *skb = NULL;
327 struct ieee80211_tx_info *tx_info;
328 int band = hw->conf.channel->band;
329 struct ieee80211_supported_band *sband = &sc->sbands[band];
330 struct ath_tx_control txctl;
331 struct ath9k_hw_cal_data *caldata = ah->caldata;
332 struct ath_common *common = ath9k_hw_common(ah);
343 skb = alloc_skb(len, GFP_KERNEL);
347 tx_info = IEEE80211_SKB_CB(skb);
350 memset(skb->data, 0, len);
351 hdr = (struct ieee80211_hdr *)skb->data;
352 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
353 hdr->frame_control = cpu_to_le16(ftype);
354 hdr->duration_id = cpu_to_le16(10);
355 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
356 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
357 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
359 memset(&txctl, 0, sizeof(txctl));
360 txctl.txq = sc->tx.txq_map[WME_AC_BE];
363 ar9003_paprd_init_table(ah);
364 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
365 if (!(common->tx_chainmask & BIT(chain)))
369 memset(tx_info, 0, sizeof(*tx_info));
370 tx_info->band = band;
372 for (i = 0; i < 4; i++) {
373 tx_info->control.rates[i].idx = sband->n_bitrates - 1;
374 tx_info->control.rates[i].count = 6;
377 init_completion(&sc->paprd_complete);
378 sc->paprd_pending = true;
379 ar9003_paprd_setup_gain_table(ah, chain);
380 txctl.paprd = BIT(chain);
381 if (ath_tx_start(hw, skb, &txctl) != 0)
384 time_left = wait_for_completion_timeout(&sc->paprd_complete,
385 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
386 sc->paprd_pending = false;
388 ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
389 "Timeout waiting for paprd training on "
395 if (!ar9003_paprd_is_done(ah))
398 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
406 caldata->paprd_done = true;
407 ath_paprd_activate(sc);
411 ath9k_ps_restore(sc);
415 * This routine performs the periodic noise floor calibration function
416 * that is used to adjust and optimize the chip performance. This
417 * takes environmental changes (location, temperature) into account.
418 * When the task is complete, it reschedules itself depending on the
419 * appropriate interval that was calculated.
421 void ath_ani_calibrate(unsigned long data)
423 struct ath_softc *sc = (struct ath_softc *)data;
424 struct ath_hw *ah = sc->sc_ah;
425 struct ath_common *common = ath9k_hw_common(ah);
426 bool longcal = false;
427 bool shortcal = false;
428 bool aniflag = false;
429 unsigned int timestamp = jiffies_to_msecs(jiffies);
430 u32 cal_interval, short_cal_interval, long_cal_interval;
433 if (ah->caldata && ah->caldata->nfcal_interference)
434 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
436 long_cal_interval = ATH_LONG_CALINTERVAL;
438 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
439 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
441 /* Only calibrate if awake */
442 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
447 /* Long calibration runs independently of short calibration. */
448 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
450 ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
451 common->ani.longcal_timer = timestamp;
454 /* Short calibration applies only while caldone is false */
455 if (!common->ani.caldone) {
456 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
458 ath_print(common, ATH_DBG_ANI,
459 "shortcal @%lu\n", jiffies);
460 common->ani.shortcal_timer = timestamp;
461 common->ani.resetcal_timer = timestamp;
464 if ((timestamp - common->ani.resetcal_timer) >=
465 ATH_RESTART_CALINTERVAL) {
466 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
467 if (common->ani.caldone)
468 common->ani.resetcal_timer = timestamp;
472 /* Verify whether we must check ANI */
473 if ((timestamp - common->ani.checkani_timer) >=
474 ah->config.ani_poll_interval) {
476 common->ani.checkani_timer = timestamp;
479 /* Skip all processing if there's nothing to do. */
480 if (longcal || shortcal || aniflag) {
481 /* Call ANI routine if necessary */
483 spin_lock_irqsave(&common->cc_lock, flags);
484 ath9k_hw_ani_monitor(ah, ah->curchan);
485 ath_update_survey_stats(sc);
486 spin_unlock_irqrestore(&common->cc_lock, flags);
489 /* Perform calibration if necessary */
490 if (longcal || shortcal) {
491 common->ani.caldone =
492 ath9k_hw_calibrate(ah,
494 common->rx_chainmask,
499 ath9k_ps_restore(sc);
503 * Set timer interval based on previous results.
504 * The interval must be the shortest necessary to satisfy ANI,
505 * short calibration and long calibration.
507 cal_interval = ATH_LONG_CALINTERVAL;
508 if (sc->sc_ah->config.enable_ani)
509 cal_interval = min(cal_interval,
510 (u32)ah->config.ani_poll_interval);
511 if (!common->ani.caldone)
512 cal_interval = min(cal_interval, (u32)short_cal_interval);
514 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
515 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
516 if (!ah->caldata->paprd_done)
517 ieee80211_queue_work(sc->hw, &sc->paprd_work);
519 ath_paprd_activate(sc);
524 * Update tx/rx chainmask. For legacy association,
525 * hard code chainmask to 1x1, for 11n association, use
526 * the chainmask configuration, for bt coexistence, use
527 * the chainmask configuration even in legacy mode.
529 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
531 struct ath_hw *ah = sc->sc_ah;
532 struct ath_common *common = ath9k_hw_common(ah);
534 if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
535 (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
536 common->tx_chainmask = ah->caps.tx_chainmask;
537 common->rx_chainmask = ah->caps.rx_chainmask;
539 common->tx_chainmask = 1;
540 common->rx_chainmask = 1;
543 ath_print(common, ATH_DBG_CONFIG,
544 "tx chmask: %d, rx chmask: %d\n",
545 common->tx_chainmask,
546 common->rx_chainmask);
549 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
553 an = (struct ath_node *)sta->drv_priv;
555 if (sc->sc_flags & SC_OP_TXAGGR) {
556 ath_tx_node_init(sc, an);
557 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
558 sta->ht_cap.ampdu_factor);
559 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
563 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
565 struct ath_node *an = (struct ath_node *)sta->drv_priv;
567 if (sc->sc_flags & SC_OP_TXAGGR)
568 ath_tx_node_cleanup(sc, an);
571 void ath_hw_check(struct work_struct *work)
573 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
578 for (i = 0; i < 3; i++) {
579 if (ath9k_hw_check_alive(sc->sc_ah))
587 ath9k_ps_restore(sc);
590 void ath9k_tasklet(unsigned long data)
592 struct ath_softc *sc = (struct ath_softc *)data;
593 struct ath_hw *ah = sc->sc_ah;
594 struct ath_common *common = ath9k_hw_common(ah);
596 u32 status = sc->intrstatus;
601 if (status & ATH9K_INT_FATAL) {
603 ath9k_ps_restore(sc);
607 spin_lock_bh(&sc->sc_pcu_lock);
609 if (!ath9k_hw_check_alive(ah))
610 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
612 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
613 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
616 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
618 if (status & rxmask) {
619 /* Check for high priority Rx first */
620 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
621 (status & ATH9K_INT_RXHP))
622 ath_rx_tasklet(sc, 0, true);
624 ath_rx_tasklet(sc, 0, false);
627 if (status & ATH9K_INT_TX) {
628 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
629 ath_tx_edma_tasklet(sc);
634 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
636 * TSF sync does not look correct; remain awake to sync with
639 ath_print(common, ATH_DBG_PS,
640 "TSFOOR - Sync with next Beacon\n");
641 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
644 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
645 if (status & ATH9K_INT_GENTIMER)
646 ath_gen_timer_isr(sc->sc_ah);
648 /* re-enable hardware interrupt */
649 ath9k_hw_enable_interrupts(ah);
651 spin_unlock_bh(&sc->sc_pcu_lock);
652 ath9k_ps_restore(sc);
655 irqreturn_t ath_isr(int irq, void *dev)
657 #define SCHED_INTR ( \
670 struct ath_softc *sc = dev;
671 struct ath_hw *ah = sc->sc_ah;
672 struct ath_common *common = ath9k_hw_common(ah);
673 enum ath9k_int status;
677 * The hardware is not ready/present, don't
678 * touch anything. Note this can happen early
679 * on if the IRQ is shared.
681 if (sc->sc_flags & SC_OP_INVALID)
685 /* shared irq, not for us */
687 if (!ath9k_hw_intrpend(ah))
691 * Figure out the reason(s) for the interrupt. Note
692 * that the hal returns a pseudo-ISR that may include
693 * bits we haven't explicitly enabled so we mask the
694 * value to insure we only process bits we requested.
696 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
697 status &= ah->imask; /* discard unasked-for bits */
700 * If there are no status bits set, then this interrupt was not
701 * for me (should have been caught above).
706 /* Cache the status */
707 sc->intrstatus = status;
709 if (status & SCHED_INTR)
713 * If a FATAL or RXORN interrupt is received, we have to reset the
716 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
717 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
720 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
721 (status & ATH9K_INT_BB_WATCHDOG)) {
723 spin_lock(&common->cc_lock);
724 ath_hw_cycle_counters_update(common);
725 ar9003_hw_bb_watchdog_dbg_info(ah);
726 spin_unlock(&common->cc_lock);
731 if (status & ATH9K_INT_SWBA)
732 tasklet_schedule(&sc->bcon_tasklet);
734 if (status & ATH9K_INT_TXURN)
735 ath9k_hw_updatetxtriglevel(ah, true);
737 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
738 if (status & ATH9K_INT_RXEOL) {
739 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
740 ath9k_hw_set_interrupts(ah, ah->imask);
744 if (status & ATH9K_INT_MIB) {
746 * Disable interrupts until we service the MIB
747 * interrupt; otherwise it will continue to
750 ath9k_hw_disable_interrupts(ah);
752 * Let the hal handle the event. We assume
753 * it will clear whatever condition caused
756 spin_lock(&common->cc_lock);
757 ath9k_hw_proc_mib_event(ah);
758 spin_unlock(&common->cc_lock);
759 ath9k_hw_enable_interrupts(ah);
762 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
763 if (status & ATH9K_INT_TIM_TIMER) {
764 /* Clear RxAbort bit so that we can
766 ath9k_setpower(sc, ATH9K_PM_AWAKE);
767 ath9k_hw_setrxabort(sc->sc_ah, 0);
768 sc->ps_flags |= PS_WAIT_FOR_BEACON;
773 ath_debug_stat_interrupt(sc, status);
776 /* turn off every interrupt */
777 ath9k_hw_disable_interrupts(ah);
778 tasklet_schedule(&sc->intr_tq);
786 static u32 ath_get_extchanmode(struct ath_softc *sc,
787 struct ieee80211_channel *chan,
788 enum nl80211_channel_type channel_type)
792 switch (chan->band) {
793 case IEEE80211_BAND_2GHZ:
794 switch(channel_type) {
795 case NL80211_CHAN_NO_HT:
796 case NL80211_CHAN_HT20:
797 chanmode = CHANNEL_G_HT20;
799 case NL80211_CHAN_HT40PLUS:
800 chanmode = CHANNEL_G_HT40PLUS;
802 case NL80211_CHAN_HT40MINUS:
803 chanmode = CHANNEL_G_HT40MINUS;
807 case IEEE80211_BAND_5GHZ:
808 switch(channel_type) {
809 case NL80211_CHAN_NO_HT:
810 case NL80211_CHAN_HT20:
811 chanmode = CHANNEL_A_HT20;
813 case NL80211_CHAN_HT40PLUS:
814 chanmode = CHANNEL_A_HT40PLUS;
816 case NL80211_CHAN_HT40MINUS:
817 chanmode = CHANNEL_A_HT40MINUS;
828 static void ath9k_bss_assoc_info(struct ath_softc *sc,
829 struct ieee80211_hw *hw,
830 struct ieee80211_vif *vif,
831 struct ieee80211_bss_conf *bss_conf)
833 struct ath_wiphy *aphy = hw->priv;
834 struct ath_hw *ah = sc->sc_ah;
835 struct ath_common *common = ath9k_hw_common(ah);
837 if (bss_conf->assoc) {
838 ath_print(common, ATH_DBG_CONFIG,
839 "Bss Info ASSOC %d, bssid: %pM\n",
840 bss_conf->aid, common->curbssid);
842 /* New association, store aid */
843 common->curaid = bss_conf->aid;
844 ath9k_hw_write_associd(ah);
847 * Request a re-configuration of Beacon related timers
848 * on the receipt of the first Beacon frame (i.e.,
849 * after time sync with the AP).
851 sc->ps_flags |= PS_BEACON_SYNC;
853 /* Configure the beacon */
854 ath_beacon_config(sc, vif);
856 /* Reset rssi stats */
857 aphy->last_rssi = ATH_RSSI_DUMMY_MARKER;
858 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
860 sc->sc_flags |= SC_OP_ANI_RUN;
861 ath_start_ani(common);
863 ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
866 sc->sc_flags &= ~SC_OP_ANI_RUN;
867 del_timer_sync(&common->ani.timer);
871 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
873 struct ath_hw *ah = sc->sc_ah;
874 struct ath_common *common = ath9k_hw_common(ah);
875 struct ieee80211_channel *channel = hw->conf.channel;
879 spin_lock_bh(&sc->sc_pcu_lock);
881 ath9k_hw_configpcipowersave(ah, 0, 0);
884 ah->curchan = ath_get_curchannel(sc, sc->hw);
886 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
888 ath_print(common, ATH_DBG_FATAL,
889 "Unable to reset channel (%u MHz), "
891 channel->center_freq, r);
894 ath_update_txpow(sc);
895 if (ath_startrecv(sc) != 0) {
896 ath_print(common, ATH_DBG_FATAL,
897 "Unable to restart recv logic\n");
898 spin_unlock_bh(&sc->sc_pcu_lock);
901 if (sc->sc_flags & SC_OP_BEACONS)
902 ath_beacon_config(sc, NULL); /* restart beacons */
904 /* Re-Enable interrupts */
905 ath9k_hw_set_interrupts(ah, ah->imask);
908 ath9k_hw_cfg_output(ah, ah->led_pin,
909 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
910 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
912 ieee80211_wake_queues(hw);
913 spin_unlock_bh(&sc->sc_pcu_lock);
915 ath9k_ps_restore(sc);
918 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
920 struct ath_hw *ah = sc->sc_ah;
921 struct ieee80211_channel *channel = hw->conf.channel;
925 spin_lock_bh(&sc->sc_pcu_lock);
927 ieee80211_stop_queues(hw);
930 * Keep the LED on when the radio is disabled
931 * during idle unassociated state.
934 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
935 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
938 /* Disable interrupts */
939 ath9k_hw_disable_interrupts(ah);
941 ath_drain_all_txq(sc, false); /* clear pending tx frames */
943 ath_stoprecv(sc); /* turn off frame recv */
944 ath_flushrecv(sc); /* flush recv queue */
947 ah->curchan = ath_get_curchannel(sc, hw);
949 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
951 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
952 "Unable to reset channel (%u MHz), "
954 channel->center_freq, r);
957 ath9k_hw_phy_disable(ah);
959 ath9k_hw_configpcipowersave(ah, 1, 1);
961 spin_unlock_bh(&sc->sc_pcu_lock);
962 ath9k_ps_restore(sc);
964 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
967 int ath_reset(struct ath_softc *sc, bool retry_tx)
969 struct ath_hw *ah = sc->sc_ah;
970 struct ath_common *common = ath9k_hw_common(ah);
971 struct ieee80211_hw *hw = sc->hw;
975 del_timer_sync(&common->ani.timer);
977 spin_lock_bh(&sc->sc_pcu_lock);
979 ieee80211_stop_queues(hw);
981 ath9k_hw_disable_interrupts(ah);
982 ath_drain_all_txq(sc, retry_tx);
987 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
989 ath_print(common, ATH_DBG_FATAL,
990 "Unable to reset hardware; reset status %d\n", r);
992 if (ath_startrecv(sc) != 0)
993 ath_print(common, ATH_DBG_FATAL,
994 "Unable to start recv logic\n");
997 * We may be doing a reset in response to a request
998 * that changes the channel so update any state that
999 * might change as a result.
1001 ath_update_txpow(sc);
1003 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
1004 ath_beacon_config(sc, NULL); /* restart beacons */
1006 ath9k_hw_set_interrupts(ah, ah->imask);
1010 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1011 if (ATH_TXQ_SETUP(sc, i)) {
1012 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1013 ath_txq_schedule(sc, &sc->tx.txq[i]);
1014 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1019 ieee80211_wake_queues(hw);
1020 spin_unlock_bh(&sc->sc_pcu_lock);
1023 ath_start_ani(common);
1028 /* XXX: Remove me once we don't depend on ath9k_channel for all
1029 * this redundant data */
1030 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1031 struct ath9k_channel *ichan)
1033 struct ieee80211_channel *chan = hw->conf.channel;
1034 struct ieee80211_conf *conf = &hw->conf;
1036 ichan->channel = chan->center_freq;
1039 if (chan->band == IEEE80211_BAND_2GHZ) {
1040 ichan->chanmode = CHANNEL_G;
1041 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1043 ichan->chanmode = CHANNEL_A;
1044 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1047 if (conf_is_ht(conf))
1048 ichan->chanmode = ath_get_extchanmode(sc, chan,
1049 conf->channel_type);
1052 /**********************/
1053 /* mac80211 callbacks */
1054 /**********************/
1056 static int ath9k_start(struct ieee80211_hw *hw)
1058 struct ath_wiphy *aphy = hw->priv;
1059 struct ath_softc *sc = aphy->sc;
1060 struct ath_hw *ah = sc->sc_ah;
1061 struct ath_common *common = ath9k_hw_common(ah);
1062 struct ieee80211_channel *curchan = hw->conf.channel;
1063 struct ath9k_channel *init_channel;
1066 ath_print(common, ATH_DBG_CONFIG,
1067 "Starting driver with initial channel: %d MHz\n",
1068 curchan->center_freq);
1070 mutex_lock(&sc->mutex);
1072 if (ath9k_wiphy_started(sc)) {
1073 if (sc->chan_idx == curchan->hw_value) {
1075 * Already on the operational channel, the new wiphy
1076 * can be marked active.
1078 aphy->state = ATH_WIPHY_ACTIVE;
1079 ieee80211_wake_queues(hw);
1082 * Another wiphy is on another channel, start the new
1083 * wiphy in paused state.
1085 aphy->state = ATH_WIPHY_PAUSED;
1086 ieee80211_stop_queues(hw);
1088 mutex_unlock(&sc->mutex);
1091 aphy->state = ATH_WIPHY_ACTIVE;
1093 /* setup initial channel */
1095 sc->chan_idx = curchan->hw_value;
1097 init_channel = ath_get_curchannel(sc, hw);
1099 /* Reset SERDES registers */
1100 ath9k_hw_configpcipowersave(ah, 0, 0);
1103 * The basic interface to setting the hardware in a good
1104 * state is ``reset''. On return the hardware is known to
1105 * be powered up and with interrupts disabled. This must
1106 * be followed by initialization of the appropriate bits
1107 * and then setup of the interrupt mask.
1109 spin_lock_bh(&sc->sc_pcu_lock);
1110 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1112 ath_print(common, ATH_DBG_FATAL,
1113 "Unable to reset hardware; reset status %d "
1114 "(freq %u MHz)\n", r,
1115 curchan->center_freq);
1116 spin_unlock_bh(&sc->sc_pcu_lock);
1121 * This is needed only to setup initial state
1122 * but it's best done after a reset.
1124 ath_update_txpow(sc);
1127 * Setup the hardware after reset:
1128 * The receive engine is set going.
1129 * Frame transmit is handled entirely
1130 * in the frame output path; there's nothing to do
1131 * here except setup the interrupt mask.
1133 if (ath_startrecv(sc) != 0) {
1134 ath_print(common, ATH_DBG_FATAL,
1135 "Unable to start recv logic\n");
1137 spin_unlock_bh(&sc->sc_pcu_lock);
1140 spin_unlock_bh(&sc->sc_pcu_lock);
1142 /* Setup our intr mask. */
1143 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1144 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1147 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1148 ah->imask |= ATH9K_INT_RXHP |
1150 ATH9K_INT_BB_WATCHDOG;
1152 ah->imask |= ATH9K_INT_RX;
1154 ah->imask |= ATH9K_INT_GTT;
1156 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1157 ah->imask |= ATH9K_INT_CST;
1159 sc->sc_flags &= ~SC_OP_INVALID;
1161 /* Disable BMISS interrupt when we're not associated */
1162 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1163 ath9k_hw_set_interrupts(ah, ah->imask);
1165 ieee80211_wake_queues(hw);
1167 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1169 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1170 !ah->btcoex_hw.enabled) {
1171 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1172 AR_STOMP_LOW_WLAN_WGHT);
1173 ath9k_hw_btcoex_enable(ah);
1175 if (common->bus_ops->bt_coex_prep)
1176 common->bus_ops->bt_coex_prep(common);
1177 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1178 ath9k_btcoex_timer_resume(sc);
1182 mutex_unlock(&sc->mutex);
1187 static int ath9k_tx(struct ieee80211_hw *hw,
1188 struct sk_buff *skb)
1190 struct ath_wiphy *aphy = hw->priv;
1191 struct ath_softc *sc = aphy->sc;
1192 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1193 struct ath_tx_control txctl;
1194 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1196 if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1197 ath_print(common, ATH_DBG_XMIT,
1198 "ath9k: %s: TX in unexpected wiphy state "
1199 "%d\n", wiphy_name(hw->wiphy), aphy->state);
1203 if (sc->ps_enabled) {
1205 * mac80211 does not set PM field for normal data frames, so we
1206 * need to update that based on the current PS mode.
1208 if (ieee80211_is_data(hdr->frame_control) &&
1209 !ieee80211_is_nullfunc(hdr->frame_control) &&
1210 !ieee80211_has_pm(hdr->frame_control)) {
1211 ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
1212 "while in PS mode\n");
1213 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1217 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1219 * We are using PS-Poll and mac80211 can request TX while in
1220 * power save mode. Need to wake up hardware for the TX to be
1221 * completed and if needed, also for RX of buffered frames.
1223 ath9k_ps_wakeup(sc);
1224 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1225 ath9k_hw_setrxabort(sc->sc_ah, 0);
1226 if (ieee80211_is_pspoll(hdr->frame_control)) {
1227 ath_print(common, ATH_DBG_PS,
1228 "Sending PS-Poll to pick a buffered frame\n");
1229 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1231 ath_print(common, ATH_DBG_PS,
1232 "Wake up to complete TX\n");
1233 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1236 * The actual restore operation will happen only after
1237 * the sc_flags bit is cleared. We are just dropping
1238 * the ps_usecount here.
1240 ath9k_ps_restore(sc);
1243 memset(&txctl, 0, sizeof(struct ath_tx_control));
1244 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1246 ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1248 if (ath_tx_start(hw, skb, &txctl) != 0) {
1249 ath_print(common, ATH_DBG_XMIT, "TX failed\n");
1255 dev_kfree_skb_any(skb);
1259 static void ath9k_stop(struct ieee80211_hw *hw)
1261 struct ath_wiphy *aphy = hw->priv;
1262 struct ath_softc *sc = aphy->sc;
1263 struct ath_hw *ah = sc->sc_ah;
1264 struct ath_common *common = ath9k_hw_common(ah);
1267 mutex_lock(&sc->mutex);
1269 aphy->state = ATH_WIPHY_INACTIVE;
1272 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1274 cancel_delayed_work_sync(&sc->tx_complete_work);
1275 cancel_work_sync(&sc->paprd_work);
1276 cancel_work_sync(&sc->hw_check_work);
1278 for (i = 0; i < sc->num_sec_wiphy; i++) {
1279 if (sc->sec_wiphy[i])
1283 if (i == sc->num_sec_wiphy) {
1284 cancel_delayed_work_sync(&sc->wiphy_work);
1285 cancel_work_sync(&sc->chan_work);
1288 if (sc->sc_flags & SC_OP_INVALID) {
1289 ath_print(common, ATH_DBG_ANY, "Device not present\n");
1290 mutex_unlock(&sc->mutex);
1294 if (ath9k_wiphy_started(sc)) {
1295 mutex_unlock(&sc->mutex);
1296 return; /* another wiphy still in use */
1299 /* Ensure HW is awake when we try to shut it down. */
1300 ath9k_ps_wakeup(sc);
1302 if (ah->btcoex_hw.enabled) {
1303 ath9k_hw_btcoex_disable(ah);
1304 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1305 ath9k_btcoex_timer_pause(sc);
1308 spin_lock_bh(&sc->sc_pcu_lock);
1310 /* make sure h/w will not generate any interrupt
1311 * before setting the invalid flag. */
1312 ath9k_hw_disable_interrupts(ah);
1314 if (!(sc->sc_flags & SC_OP_INVALID)) {
1315 ath_drain_all_txq(sc, false);
1317 ath9k_hw_phy_disable(ah);
1319 sc->rx.rxlink = NULL;
1321 /* disable HAL and put h/w to sleep */
1322 ath9k_hw_disable(ah);
1323 ath9k_hw_configpcipowersave(ah, 1, 1);
1325 spin_unlock_bh(&sc->sc_pcu_lock);
1327 ath9k_ps_restore(sc);
1329 /* Finally, put the chip in FULL SLEEP mode */
1330 ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
1332 sc->sc_flags |= SC_OP_INVALID;
1334 mutex_unlock(&sc->mutex);
1336 ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
1339 static int ath9k_add_interface(struct ieee80211_hw *hw,
1340 struct ieee80211_vif *vif)
1342 struct ath_wiphy *aphy = hw->priv;
1343 struct ath_softc *sc = aphy->sc;
1344 struct ath_hw *ah = sc->sc_ah;
1345 struct ath_common *common = ath9k_hw_common(ah);
1346 struct ath_vif *avp = (void *)vif->drv_priv;
1347 enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1350 mutex_lock(&sc->mutex);
1352 switch (vif->type) {
1353 case NL80211_IFTYPE_STATION:
1354 ic_opmode = NL80211_IFTYPE_STATION;
1356 case NL80211_IFTYPE_WDS:
1357 ic_opmode = NL80211_IFTYPE_WDS;
1359 case NL80211_IFTYPE_ADHOC:
1360 case NL80211_IFTYPE_AP:
1361 case NL80211_IFTYPE_MESH_POINT:
1362 if (sc->nbcnvifs >= ATH_BCBUF) {
1366 ic_opmode = vif->type;
1369 ath_print(common, ATH_DBG_FATAL,
1370 "Interface type %d not yet supported\n", vif->type);
1375 ath_print(common, ATH_DBG_CONFIG,
1376 "Attach a VIF of type: %d\n", ic_opmode);
1378 /* Set the VIF opmode */
1379 avp->av_opmode = ic_opmode;
1384 ath9k_set_bssid_mask(hw, vif);
1387 goto out; /* skip global settings for secondary vif */
1389 if (ic_opmode == NL80211_IFTYPE_AP) {
1390 ath9k_hw_set_tsfadjust(ah, 1);
1391 sc->sc_flags |= SC_OP_TSF_RESET;
1394 /* Set the device opmode */
1395 ah->opmode = ic_opmode;
1398 * Enable MIB interrupts when there are hardware phy counters.
1399 * Note we only do this (at the moment) for station mode.
1401 if ((vif->type == NL80211_IFTYPE_STATION) ||
1402 (vif->type == NL80211_IFTYPE_ADHOC) ||
1403 (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1404 if (ah->config.enable_ani)
1405 ah->imask |= ATH9K_INT_MIB;
1406 ah->imask |= ATH9K_INT_TSFOOR;
1409 ath9k_hw_set_interrupts(ah, ah->imask);
1411 if (vif->type == NL80211_IFTYPE_AP ||
1412 vif->type == NL80211_IFTYPE_ADHOC ||
1413 vif->type == NL80211_IFTYPE_MONITOR) {
1414 sc->sc_flags |= SC_OP_ANI_RUN;
1415 ath_start_ani(common);
1419 mutex_unlock(&sc->mutex);
1423 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1424 struct ieee80211_vif *vif)
1426 struct ath_wiphy *aphy = hw->priv;
1427 struct ath_softc *sc = aphy->sc;
1428 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1429 struct ath_vif *avp = (void *)vif->drv_priv;
1432 ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
1434 mutex_lock(&sc->mutex);
1437 sc->sc_flags &= ~SC_OP_ANI_RUN;
1438 del_timer_sync(&common->ani.timer);
1440 /* Reclaim beacon resources */
1441 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1442 (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1443 (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
1444 ath9k_ps_wakeup(sc);
1445 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1446 ath9k_ps_restore(sc);
1449 ath_beacon_return(sc, avp);
1450 sc->sc_flags &= ~SC_OP_BEACONS;
1452 for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
1453 if (sc->beacon.bslot[i] == vif) {
1454 printk(KERN_DEBUG "%s: vif had allocated beacon "
1455 "slot\n", __func__);
1456 sc->beacon.bslot[i] = NULL;
1457 sc->beacon.bslot_aphy[i] = NULL;
1463 mutex_unlock(&sc->mutex);
1466 static void ath9k_enable_ps(struct ath_softc *sc)
1468 struct ath_hw *ah = sc->sc_ah;
1470 sc->ps_enabled = true;
1471 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1472 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1473 ah->imask |= ATH9K_INT_TIM_TIMER;
1474 ath9k_hw_set_interrupts(ah, ah->imask);
1476 ath9k_hw_setrxabort(ah, 1);
1480 static void ath9k_disable_ps(struct ath_softc *sc)
1482 struct ath_hw *ah = sc->sc_ah;
1484 sc->ps_enabled = false;
1485 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1486 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1487 ath9k_hw_setrxabort(ah, 0);
1488 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1490 PS_WAIT_FOR_PSPOLL_DATA |
1491 PS_WAIT_FOR_TX_ACK);
1492 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1493 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1494 ath9k_hw_set_interrupts(ah, ah->imask);
1500 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1502 struct ath_wiphy *aphy = hw->priv;
1503 struct ath_softc *sc = aphy->sc;
1504 struct ath_hw *ah = sc->sc_ah;
1505 struct ath_common *common = ath9k_hw_common(ah);
1506 struct ieee80211_conf *conf = &hw->conf;
1509 mutex_lock(&sc->mutex);
1512 * Leave this as the first check because we need to turn on the
1513 * radio if it was disabled before prior to processing the rest
1514 * of the changes. Likewise we must only disable the radio towards
1517 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1519 bool all_wiphys_idle;
1520 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1522 spin_lock_bh(&sc->wiphy_lock);
1523 all_wiphys_idle = ath9k_all_wiphys_idle(sc);
1524 ath9k_set_wiphy_idle(aphy, idle);
1526 enable_radio = (!idle && all_wiphys_idle);
1529 * After we unlock here its possible another wiphy
1530 * can be re-renabled so to account for that we will
1531 * only disable the radio toward the end of this routine
1532 * if by then all wiphys are still idle.
1534 spin_unlock_bh(&sc->wiphy_lock);
1537 sc->ps_idle = false;
1538 ath_radio_enable(sc, hw);
1539 ath_print(common, ATH_DBG_CONFIG,
1540 "not-idle: enabling radio\n");
1545 * We just prepare to enable PS. We have to wait until our AP has
1546 * ACK'd our null data frame to disable RX otherwise we'll ignore
1547 * those ACKs and end up retransmitting the same null data frames.
1548 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1550 if (changed & IEEE80211_CONF_CHANGE_PS) {
1551 unsigned long flags;
1552 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1553 if (conf->flags & IEEE80211_CONF_PS)
1554 ath9k_enable_ps(sc);
1556 ath9k_disable_ps(sc);
1557 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1560 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1561 if (conf->flags & IEEE80211_CONF_MONITOR) {
1562 ath_print(common, ATH_DBG_CONFIG,
1563 "HW opmode set to Monitor mode\n");
1564 sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
1568 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1569 struct ieee80211_channel *curchan = hw->conf.channel;
1570 int pos = curchan->hw_value;
1572 unsigned long flags;
1575 old_pos = ah->curchan - &ah->channels[0];
1577 aphy->chan_idx = pos;
1578 aphy->chan_is_ht = conf_is_ht(conf);
1579 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1580 sc->sc_flags |= SC_OP_OFFCHANNEL;
1582 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1584 if (aphy->state == ATH_WIPHY_SCAN ||
1585 aphy->state == ATH_WIPHY_ACTIVE)
1586 ath9k_wiphy_pause_all_forced(sc, aphy);
1589 * Do not change operational channel based on a paused
1592 goto skip_chan_change;
1595 ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1596 curchan->center_freq);
1598 /* XXX: remove me eventualy */
1599 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1601 ath_update_chainmask(sc, conf_is_ht(conf));
1603 /* update survey stats for the old channel before switching */
1604 spin_lock_irqsave(&common->cc_lock, flags);
1605 ath_update_survey_stats(sc);
1606 spin_unlock_irqrestore(&common->cc_lock, flags);
1609 * If the operating channel changes, change the survey in-use flags
1611 * Reset the survey data for the new channel, unless we're switching
1612 * back to the operating channel from an off-channel operation.
1614 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1615 sc->cur_survey != &sc->survey[pos]) {
1618 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1620 sc->cur_survey = &sc->survey[pos];
1622 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1623 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1624 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1625 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1628 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1629 ath_print(common, ATH_DBG_FATAL,
1630 "Unable to set channel\n");
1631 mutex_unlock(&sc->mutex);
1636 * The most recent snapshot of channel->noisefloor for the old
1637 * channel is only available after the hardware reset. Copy it to
1638 * the survey stats now.
1641 ath_update_survey_nf(sc, old_pos);
1645 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1646 sc->config.txpowlimit = 2 * conf->power_level;
1647 ath_update_txpow(sc);
1650 spin_lock_bh(&sc->wiphy_lock);
1651 disable_radio = ath9k_all_wiphys_idle(sc);
1652 spin_unlock_bh(&sc->wiphy_lock);
1654 if (disable_radio) {
1655 ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1657 ath_radio_disable(sc, hw);
1660 mutex_unlock(&sc->mutex);
1665 #define SUPPORTED_FILTERS \
1666 (FIF_PROMISC_IN_BSS | \
1671 FIF_BCN_PRBRESP_PROMISC | \
1675 /* FIXME: sc->sc_full_reset ? */
1676 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1677 unsigned int changed_flags,
1678 unsigned int *total_flags,
1681 struct ath_wiphy *aphy = hw->priv;
1682 struct ath_softc *sc = aphy->sc;
1685 changed_flags &= SUPPORTED_FILTERS;
1686 *total_flags &= SUPPORTED_FILTERS;
1688 sc->rx.rxfilter = *total_flags;
1689 ath9k_ps_wakeup(sc);
1690 rfilt = ath_calcrxfilter(sc);
1691 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1692 ath9k_ps_restore(sc);
1694 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1695 "Set HW RX filter: 0x%x\n", rfilt);
1698 static int ath9k_sta_add(struct ieee80211_hw *hw,
1699 struct ieee80211_vif *vif,
1700 struct ieee80211_sta *sta)
1702 struct ath_wiphy *aphy = hw->priv;
1703 struct ath_softc *sc = aphy->sc;
1705 ath_node_attach(sc, sta);
1710 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1711 struct ieee80211_vif *vif,
1712 struct ieee80211_sta *sta)
1714 struct ath_wiphy *aphy = hw->priv;
1715 struct ath_softc *sc = aphy->sc;
1717 ath_node_detach(sc, sta);
1722 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1723 const struct ieee80211_tx_queue_params *params)
1725 struct ath_wiphy *aphy = hw->priv;
1726 struct ath_softc *sc = aphy->sc;
1727 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1728 struct ath_txq *txq;
1729 struct ath9k_tx_queue_info qi;
1732 if (queue >= WME_NUM_AC)
1735 txq = sc->tx.txq_map[queue];
1737 mutex_lock(&sc->mutex);
1739 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1741 qi.tqi_aifs = params->aifs;
1742 qi.tqi_cwmin = params->cw_min;
1743 qi.tqi_cwmax = params->cw_max;
1744 qi.tqi_burstTime = params->txop;
1746 ath_print(common, ATH_DBG_CONFIG,
1747 "Configure tx [queue/halq] [%d/%d], "
1748 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1749 queue, txq->axq_qnum, params->aifs, params->cw_min,
1750 params->cw_max, params->txop);
1752 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1754 ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
1756 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1757 if (queue == WME_AC_BE && !ret)
1758 ath_beaconq_config(sc);
1760 mutex_unlock(&sc->mutex);
1765 static int ath9k_set_key(struct ieee80211_hw *hw,
1766 enum set_key_cmd cmd,
1767 struct ieee80211_vif *vif,
1768 struct ieee80211_sta *sta,
1769 struct ieee80211_key_conf *key)
1771 struct ath_wiphy *aphy = hw->priv;
1772 struct ath_softc *sc = aphy->sc;
1773 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1776 if (modparam_nohwcrypt)
1779 mutex_lock(&sc->mutex);
1780 ath9k_ps_wakeup(sc);
1781 ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
1785 ret = ath_key_config(common, vif, sta, key);
1787 key->hw_key_idx = ret;
1788 /* push IV and Michael MIC generation to stack */
1789 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1790 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1791 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1792 if (sc->sc_ah->sw_mgmt_crypto &&
1793 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1794 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1799 ath_key_delete(common, key);
1805 ath9k_ps_restore(sc);
1806 mutex_unlock(&sc->mutex);
1811 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1812 struct ieee80211_vif *vif,
1813 struct ieee80211_bss_conf *bss_conf,
1816 struct ath_wiphy *aphy = hw->priv;
1817 struct ath_softc *sc = aphy->sc;
1818 struct ath_hw *ah = sc->sc_ah;
1819 struct ath_common *common = ath9k_hw_common(ah);
1820 struct ath_vif *avp = (void *)vif->drv_priv;
1824 mutex_lock(&sc->mutex);
1826 if (changed & BSS_CHANGED_BSSID) {
1828 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1829 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1831 ath9k_hw_write_associd(ah);
1833 /* Set aggregation protection mode parameters */
1834 sc->config.ath_aggr_prot = 0;
1836 /* Only legacy IBSS for now */
1837 if (vif->type == NL80211_IFTYPE_ADHOC)
1838 ath_update_chainmask(sc, 0);
1840 ath_print(common, ATH_DBG_CONFIG,
1841 "BSSID: %pM aid: 0x%x\n",
1842 common->curbssid, common->curaid);
1844 /* need to reconfigure the beacon */
1845 sc->sc_flags &= ~SC_OP_BEACONS ;
1848 /* Enable transmission of beacons (AP, IBSS, MESH) */
1849 if ((changed & BSS_CHANGED_BEACON) ||
1850 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1851 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1852 error = ath_beacon_alloc(aphy, vif);
1854 ath_beacon_config(sc, vif);
1857 if (changed & BSS_CHANGED_ERP_SLOT) {
1858 if (bss_conf->use_short_slot)
1862 if (vif->type == NL80211_IFTYPE_AP) {
1864 * Defer update, so that connected stations can adjust
1865 * their settings at the same time.
1866 * See beacon.c for more details
1868 sc->beacon.slottime = slottime;
1869 sc->beacon.updateslot = UPDATE;
1871 ah->slottime = slottime;
1872 ath9k_hw_init_global_settings(ah);
1876 /* Disable transmission of beacons */
1877 if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1878 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1880 if (changed & BSS_CHANGED_BEACON_INT) {
1881 sc->beacon_interval = bss_conf->beacon_int;
1883 * In case of AP mode, the HW TSF has to be reset
1884 * when the beacon interval changes.
1886 if (vif->type == NL80211_IFTYPE_AP) {
1887 sc->sc_flags |= SC_OP_TSF_RESET;
1888 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1889 error = ath_beacon_alloc(aphy, vif);
1891 ath_beacon_config(sc, vif);
1893 ath_beacon_config(sc, vif);
1897 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1898 ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1899 bss_conf->use_short_preamble);
1900 if (bss_conf->use_short_preamble)
1901 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1903 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1906 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1907 ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1908 bss_conf->use_cts_prot);
1909 if (bss_conf->use_cts_prot &&
1910 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1911 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1913 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1916 if (changed & BSS_CHANGED_ASSOC) {
1917 ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
1919 ath9k_bss_assoc_info(sc, hw, vif, bss_conf);
1922 mutex_unlock(&sc->mutex);
1925 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1928 struct ath_wiphy *aphy = hw->priv;
1929 struct ath_softc *sc = aphy->sc;
1931 mutex_lock(&sc->mutex);
1932 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1933 mutex_unlock(&sc->mutex);
1938 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
1940 struct ath_wiphy *aphy = hw->priv;
1941 struct ath_softc *sc = aphy->sc;
1943 mutex_lock(&sc->mutex);
1944 ath9k_hw_settsf64(sc->sc_ah, tsf);
1945 mutex_unlock(&sc->mutex);
1948 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
1950 struct ath_wiphy *aphy = hw->priv;
1951 struct ath_softc *sc = aphy->sc;
1953 mutex_lock(&sc->mutex);
1955 ath9k_ps_wakeup(sc);
1956 ath9k_hw_reset_tsf(sc->sc_ah);
1957 ath9k_ps_restore(sc);
1959 mutex_unlock(&sc->mutex);
1962 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1963 struct ieee80211_vif *vif,
1964 enum ieee80211_ampdu_mlme_action action,
1965 struct ieee80211_sta *sta,
1968 struct ath_wiphy *aphy = hw->priv;
1969 struct ath_softc *sc = aphy->sc;
1975 case IEEE80211_AMPDU_RX_START:
1976 if (!(sc->sc_flags & SC_OP_RXAGGR))
1979 case IEEE80211_AMPDU_RX_STOP:
1981 case IEEE80211_AMPDU_TX_START:
1982 if (!(sc->sc_flags & SC_OP_TXAGGR))
1985 ath9k_ps_wakeup(sc);
1986 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1988 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1989 ath9k_ps_restore(sc);
1991 case IEEE80211_AMPDU_TX_STOP:
1992 ath9k_ps_wakeup(sc);
1993 ath_tx_aggr_stop(sc, sta, tid);
1994 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1995 ath9k_ps_restore(sc);
1997 case IEEE80211_AMPDU_TX_OPERATIONAL:
1998 ath9k_ps_wakeup(sc);
1999 ath_tx_aggr_resume(sc, sta, tid);
2000 ath9k_ps_restore(sc);
2003 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
2004 "Unknown AMPDU action\n");
2012 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2013 struct survey_info *survey)
2015 struct ath_wiphy *aphy = hw->priv;
2016 struct ath_softc *sc = aphy->sc;
2017 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2018 struct ieee80211_supported_band *sband;
2019 struct ieee80211_channel *chan;
2020 unsigned long flags;
2023 spin_lock_irqsave(&common->cc_lock, flags);
2025 ath_update_survey_stats(sc);
2027 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2028 if (sband && idx >= sband->n_channels) {
2029 idx -= sband->n_channels;
2034 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2036 if (!sband || idx >= sband->n_channels) {
2037 spin_unlock_irqrestore(&common->cc_lock, flags);
2041 chan = &sband->channels[idx];
2042 pos = chan->hw_value;
2043 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2044 survey->channel = chan;
2045 spin_unlock_irqrestore(&common->cc_lock, flags);
2050 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2052 struct ath_wiphy *aphy = hw->priv;
2053 struct ath_softc *sc = aphy->sc;
2055 mutex_lock(&sc->mutex);
2056 if (ath9k_wiphy_scanning(sc)) {
2058 * There is a race here in mac80211 but fixing it requires
2059 * we revisit how we handle the scan complete callback.
2060 * After mac80211 fixes we will not have configured hardware
2061 * to the home channel nor would we have configured the RX
2064 mutex_unlock(&sc->mutex);
2068 aphy->state = ATH_WIPHY_SCAN;
2069 ath9k_wiphy_pause_all_forced(sc, aphy);
2070 mutex_unlock(&sc->mutex);
2074 * XXX: this requires a revisit after the driver
2075 * scan_complete gets moved to another place/removed in mac80211.
2077 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2079 struct ath_wiphy *aphy = hw->priv;
2080 struct ath_softc *sc = aphy->sc;
2082 mutex_lock(&sc->mutex);
2083 aphy->state = ATH_WIPHY_ACTIVE;
2084 mutex_unlock(&sc->mutex);
2087 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2089 struct ath_wiphy *aphy = hw->priv;
2090 struct ath_softc *sc = aphy->sc;
2091 struct ath_hw *ah = sc->sc_ah;
2093 mutex_lock(&sc->mutex);
2094 ah->coverage_class = coverage_class;
2095 ath9k_hw_init_global_settings(ah);
2096 mutex_unlock(&sc->mutex);
2099 struct ieee80211_ops ath9k_ops = {
2101 .start = ath9k_start,
2103 .add_interface = ath9k_add_interface,
2104 .remove_interface = ath9k_remove_interface,
2105 .config = ath9k_config,
2106 .configure_filter = ath9k_configure_filter,
2107 .sta_add = ath9k_sta_add,
2108 .sta_remove = ath9k_sta_remove,
2109 .conf_tx = ath9k_conf_tx,
2110 .bss_info_changed = ath9k_bss_info_changed,
2111 .set_key = ath9k_set_key,
2112 .get_tsf = ath9k_get_tsf,
2113 .set_tsf = ath9k_set_tsf,
2114 .reset_tsf = ath9k_reset_tsf,
2115 .ampdu_action = ath9k_ampdu_action,
2116 .get_survey = ath9k_get_survey,
2117 .sw_scan_start = ath9k_sw_scan_start,
2118 .sw_scan_complete = ath9k_sw_scan_complete,
2119 .rfkill_poll = ath9k_rfkill_poll_state,
2120 .set_coverage_class = ath9k_set_coverage_class,