Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / main.c
index dfa78e8b6470c02074025f5a94ff8be34058ad8e..52561b341d68798e55bbe8237e589da274b539b7 100644 (file)
@@ -101,6 +101,7 @@ void ath9k_ps_wakeup(struct ath_softc *sc)
                spin_lock(&common->cc_lock);
                ath_hw_cycle_counters_update(common);
                memset(&common->cc_survey, 0, sizeof(common->cc_survey));
+               memset(&common->cc_ani, 0, sizeof(common->cc_ani));
                spin_unlock(&common->cc_lock);
        }
 
@@ -143,90 +144,15 @@ void ath9k_ps_restore(struct ath_softc *sc)
        spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 }
 
-void ath_start_ani(struct ath_common *common)
-{
-       struct ath_hw *ah = common->ah;
-       unsigned long timestamp = jiffies_to_msecs(jiffies);
-       struct ath_softc *sc = (struct ath_softc *) common->priv;
-
-       if (!(sc->sc_flags & SC_OP_ANI_RUN))
-               return;
-
-       if (sc->sc_flags & SC_OP_OFFCHANNEL)
-               return;
-
-       common->ani.longcal_timer = timestamp;
-       common->ani.shortcal_timer = timestamp;
-       common->ani.checkani_timer = timestamp;
-
-       mod_timer(&common->ani.timer,
-                 jiffies +
-                       msecs_to_jiffies((u32)ah->config.ani_poll_interval));
-}
-
-static void ath_update_survey_nf(struct ath_softc *sc, int channel)
-{
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath9k_channel *chan = &ah->channels[channel];
-       struct survey_info *survey = &sc->survey[channel];
-
-       if (chan->noisefloor) {
-               survey->filled |= SURVEY_INFO_NOISE_DBM;
-               survey->noise = ath9k_hw_getchan_noise(ah, chan);
-       }
-}
-
-/*
- * Updates the survey statistics and returns the busy time since last
- * update in %, if the measurement duration was long enough for the
- * result to be useful, -1 otherwise.
- */
-static int ath_update_survey_stats(struct ath_softc *sc)
-{
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath_common *common = ath9k_hw_common(ah);
-       int pos = ah->curchan - &ah->channels[0];
-       struct survey_info *survey = &sc->survey[pos];
-       struct ath_cycle_counters *cc = &common->cc_survey;
-       unsigned int div = common->clockrate * 1000;
-       int ret = 0;
-
-       if (!ah->curchan)
-               return -1;
-
-       if (ah->power_mode == ATH9K_PM_AWAKE)
-               ath_hw_cycle_counters_update(common);
-
-       if (cc->cycles > 0) {
-               survey->filled |= SURVEY_INFO_CHANNEL_TIME |
-                       SURVEY_INFO_CHANNEL_TIME_BUSY |
-                       SURVEY_INFO_CHANNEL_TIME_RX |
-                       SURVEY_INFO_CHANNEL_TIME_TX;
-               survey->channel_time += cc->cycles / div;
-               survey->channel_time_busy += cc->rx_busy / div;
-               survey->channel_time_rx += cc->rx_frame / div;
-               survey->channel_time_tx += cc->tx_frame / div;
-       }
-
-       if (cc->cycles < div)
-               return -1;
-
-       if (cc->cycles > 0)
-               ret = cc->rx_busy * 100 / cc->cycles;
-
-       memset(cc, 0, sizeof(*cc));
-
-       ath_update_survey_nf(sc, pos);
-
-       return ret;
-}
-
 static void __ath_cancel_work(struct ath_softc *sc)
 {
        cancel_work_sync(&sc->paprd_work);
        cancel_work_sync(&sc->hw_check_work);
        cancel_delayed_work_sync(&sc->tx_complete_work);
        cancel_delayed_work_sync(&sc->hw_pll_work);
+#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
+       cancel_work_sync(&sc->mci_work);
+#endif
 }
 
 static void ath_cancel_work(struct ath_softc *sc)
@@ -235,11 +161,27 @@ static void ath_cancel_work(struct ath_softc *sc)
        cancel_work_sync(&sc->hw_reset_work);
 }
 
+static void ath_restart_work(struct ath_softc *sc)
+{
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+       ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
+
+       if (AR_SREV_9485(sc->sc_ah) || AR_SREV_9340(sc->sc_ah))
+               ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
+                                    msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
+
+       ath_start_rx_poll(sc, 3);
+
+       if (!common->disable_ani)
+               ath_start_ani(common);
+}
+
 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
 {
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
-       bool ret;
+       bool ret = true;
 
        ieee80211_stop_queues(sc->hw);
 
@@ -250,11 +192,12 @@ static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
        ath9k_debug_samp_bb_mac(sc);
        ath9k_hw_disable_interrupts(ah);
 
-       ret = ath_drain_all_txq(sc, retry_tx);
-
        if (!ath_stoprecv(sc))
                ret = false;
 
+       if (!ath_drain_all_txq(sc, retry_tx))
+               ret = false;
+
        if (!flush) {
                if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
                        ath_rx_tasklet(sc, 1, true);
@@ -270,6 +213,7 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
 {
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
+       unsigned long flags;
 
        if (ath_startrecv(sc) != 0) {
                ath_err(common, "Unable to restart recv logic\n");
@@ -278,36 +222,30 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
 
        ath9k_cmn_update_txpow(ah, sc->curtxpow,
                               sc->config.txpowlimit, &sc->curtxpow);
+
+       clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
        ath9k_hw_set_interrupts(ah);
        ath9k_hw_enable_interrupts(ah);
 
-       if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
-               if (sc->sc_flags & SC_OP_BEACONS)
-                       ath_set_beacon(sc);
-
-               ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
-               ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
-               ath_start_rx_poll(sc, 3);
-               if (!common->disable_ani)
-                       ath_start_ani(common);
-       }
-
-       if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) {
-               struct ath_hw_antcomb_conf div_ant_conf;
-               u8 lna_conf;
+       if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
+               if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
+                       goto work;
 
-               ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
+               ath_set_beacon(sc);
 
-               if (sc->ant_rx == 1)
-                       lna_conf = ATH_ANT_DIV_COMB_LNA1;
-               else
-                       lna_conf = ATH_ANT_DIV_COMB_LNA2;
-               div_ant_conf.main_lna_conf = lna_conf;
-               div_ant_conf.alt_lna_conf = lna_conf;
-
-               ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
+               if (ah->opmode == NL80211_IFTYPE_STATION &&
+                   test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
+                       spin_lock_irqsave(&sc->sc_pm_lock, flags);
+                       sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
+                       spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+               }
+       work:
+               ath_restart_work(sc);
        }
 
+       if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
+               ath_ant_comb_update(sc);
+
        ieee80211_wake_queues(sc->hw);
 
        return true;
@@ -327,7 +265,7 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 
        spin_lock_bh(&sc->sc_pcu_lock);
 
-       if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
+       if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
                fastcc = false;
                caldata = &sc->caldata;
        }
@@ -370,7 +308,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 {
        int r;
 
-       if (sc->sc_flags & SC_OP_INVALID)
+       if (test_bit(SC_OP_INVALID, &sc->sc_flags))
                return -EIO;
 
        r = ath_reset_internal(sc, hchan, false);
@@ -378,258 +316,6 @@ static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
        return r;
 }
 
-static void ath_paprd_activate(struct ath_softc *sc)
-{
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath9k_hw_cal_data *caldata = ah->caldata;
-       int chain;
-
-       if (!caldata || !caldata->paprd_done)
-               return;
-
-       ath9k_ps_wakeup(sc);
-       ar9003_paprd_enable(ah, false);
-       for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
-               if (!(ah->txchainmask & BIT(chain)))
-                       continue;
-
-               ar9003_paprd_populate_single_table(ah, caldata, chain);
-       }
-
-       ar9003_paprd_enable(ah, true);
-       ath9k_ps_restore(sc);
-}
-
-static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
-{
-       struct ieee80211_hw *hw = sc->hw;
-       struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath_common *common = ath9k_hw_common(ah);
-       struct ath_tx_control txctl;
-       int time_left;
-
-       memset(&txctl, 0, sizeof(txctl));
-       txctl.txq = sc->tx.txq_map[WME_AC_BE];
-
-       memset(tx_info, 0, sizeof(*tx_info));
-       tx_info->band = hw->conf.channel->band;
-       tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
-       tx_info->control.rates[0].idx = 0;
-       tx_info->control.rates[0].count = 1;
-       tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
-       tx_info->control.rates[1].idx = -1;
-
-       init_completion(&sc->paprd_complete);
-       txctl.paprd = BIT(chain);
-
-       if (ath_tx_start(hw, skb, &txctl) != 0) {
-               ath_dbg(common, CALIBRATE, "PAPRD TX failed\n");
-               dev_kfree_skb_any(skb);
-               return false;
-       }
-
-       time_left = wait_for_completion_timeout(&sc->paprd_complete,
-                       msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
-
-       if (!time_left)
-               ath_dbg(common, CALIBRATE,
-                       "Timeout waiting for paprd training on TX chain %d\n",
-                       chain);
-
-       return !!time_left;
-}
-
-void ath_paprd_calibrate(struct work_struct *work)
-{
-       struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
-       struct ieee80211_hw *hw = sc->hw;
-       struct ath_hw *ah = sc->sc_ah;
-       struct ieee80211_hdr *hdr;
-       struct sk_buff *skb = NULL;
-       struct ath9k_hw_cal_data *caldata = ah->caldata;
-       struct ath_common *common = ath9k_hw_common(ah);
-       int ftype;
-       int chain_ok = 0;
-       int chain;
-       int len = 1800;
-
-       if (!caldata)
-               return;
-
-       ath9k_ps_wakeup(sc);
-
-       if (ar9003_paprd_init_table(ah) < 0)
-               goto fail_paprd;
-
-       skb = alloc_skb(len, GFP_KERNEL);
-       if (!skb)
-               goto fail_paprd;
-
-       skb_put(skb, len);
-       memset(skb->data, 0, len);
-       hdr = (struct ieee80211_hdr *)skb->data;
-       ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
-       hdr->frame_control = cpu_to_le16(ftype);
-       hdr->duration_id = cpu_to_le16(10);
-       memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
-       memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
-       memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
-
-       for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
-               if (!(ah->txchainmask & BIT(chain)))
-                       continue;
-
-               chain_ok = 0;
-
-               ath_dbg(common, CALIBRATE,
-                       "Sending PAPRD frame for thermal measurement on chain %d\n",
-                       chain);
-               if (!ath_paprd_send_frame(sc, skb, chain))
-                       goto fail_paprd;
-
-               ar9003_paprd_setup_gain_table(ah, chain);
-
-               ath_dbg(common, CALIBRATE,
-                       "Sending PAPRD training frame on chain %d\n", chain);
-               if (!ath_paprd_send_frame(sc, skb, chain))
-                       goto fail_paprd;
-
-               if (!ar9003_paprd_is_done(ah)) {
-                       ath_dbg(common, CALIBRATE,
-                               "PAPRD not yet done on chain %d\n", chain);
-                       break;
-               }
-
-               if (ar9003_paprd_create_curve(ah, caldata, chain)) {
-                       ath_dbg(common, CALIBRATE,
-                               "PAPRD create curve failed on chain %d\n",
-                                                                  chain);
-                       break;
-               }
-
-               chain_ok = 1;
-       }
-       kfree_skb(skb);
-
-       if (chain_ok) {
-               caldata->paprd_done = true;
-               ath_paprd_activate(sc);
-       }
-
-fail_paprd:
-       ath9k_ps_restore(sc);
-}
-
-/*
- *  This routine performs the periodic noise floor calibration function
- *  that is used to adjust and optimize the chip performance.  This
- *  takes environmental changes (location, temperature) into account.
- *  When the task is complete, it reschedules itself depending on the
- *  appropriate interval that was calculated.
- */
-void ath_ani_calibrate(unsigned long data)
-{
-       struct ath_softc *sc = (struct ath_softc *)data;
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath_common *common = ath9k_hw_common(ah);
-       bool longcal = false;
-       bool shortcal = false;
-       bool aniflag = false;
-       unsigned int timestamp = jiffies_to_msecs(jiffies);
-       u32 cal_interval, short_cal_interval, long_cal_interval;
-       unsigned long flags;
-
-       if (ah->caldata && ah->caldata->nfcal_interference)
-               long_cal_interval = ATH_LONG_CALINTERVAL_INT;
-       else
-               long_cal_interval = ATH_LONG_CALINTERVAL;
-
-       short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
-               ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
-
-       /* Only calibrate if awake */
-       if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
-               goto set_timer;
-
-       ath9k_ps_wakeup(sc);
-
-       /* Long calibration runs independently of short calibration. */
-       if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
-               longcal = true;
-               common->ani.longcal_timer = timestamp;
-       }
-
-       /* Short calibration applies only while caldone is false */
-       if (!common->ani.caldone) {
-               if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
-                       shortcal = true;
-                       common->ani.shortcal_timer = timestamp;
-                       common->ani.resetcal_timer = timestamp;
-               }
-       } else {
-               if ((timestamp - common->ani.resetcal_timer) >=
-                   ATH_RESTART_CALINTERVAL) {
-                       common->ani.caldone = ath9k_hw_reset_calvalid(ah);
-                       if (common->ani.caldone)
-                               common->ani.resetcal_timer = timestamp;
-               }
-       }
-
-       /* Verify whether we must check ANI */
-       if (sc->sc_ah->config.enable_ani
-           && (timestamp - common->ani.checkani_timer) >=
-           ah->config.ani_poll_interval) {
-               aniflag = true;
-               common->ani.checkani_timer = timestamp;
-       }
-
-       /* Call ANI routine if necessary */
-       if (aniflag) {
-               spin_lock_irqsave(&common->cc_lock, flags);
-               ath9k_hw_ani_monitor(ah, ah->curchan);
-               ath_update_survey_stats(sc);
-               spin_unlock_irqrestore(&common->cc_lock, flags);
-       }
-
-       /* Perform calibration if necessary */
-       if (longcal || shortcal) {
-               common->ani.caldone =
-                       ath9k_hw_calibrate(ah, ah->curchan,
-                                               ah->rxchainmask, longcal);
-       }
-
-       ath_dbg(common, ANI,
-               "Calibration @%lu finished: %s %s %s, caldone: %s\n",
-               jiffies,
-               longcal ? "long" : "", shortcal ? "short" : "",
-               aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
-
-       ath9k_ps_restore(sc);
-
-set_timer:
-       /*
-       * Set timer interval based on previous results.
-       * The interval must be the shortest necessary to satisfy ANI,
-       * short calibration and long calibration.
-       */
-       ath9k_debug_samp_bb_mac(sc);
-       cal_interval = ATH_LONG_CALINTERVAL;
-       if (sc->sc_ah->config.enable_ani)
-               cal_interval = min(cal_interval,
-                                  (u32)ah->config.ani_poll_interval);
-       if (!common->ani.caldone)
-               cal_interval = min(cal_interval, (u32)short_cal_interval);
-
-       mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
-       if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
-               if (!ah->caldata->paprd_done)
-                       ieee80211_queue_work(sc->hw, &sc->paprd_work);
-               else if (!ah->paprd_table_write_done)
-                       ath_paprd_activate(sc);
-       }
-}
-
 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
                            struct ieee80211_vif *vif)
 {
@@ -667,13 +353,12 @@ static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
                ath_tx_node_cleanup(sc, an);
 }
 
-
 void ath9k_tasklet(unsigned long data)
 {
        struct ath_softc *sc = (struct ath_softc *)data;
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
-
+       unsigned long flags;
        u32 status = sc->intrstatus;
        u32 rxmask;
 
@@ -692,10 +377,12 @@ void ath9k_tasklet(unsigned long data)
 
                RESET_STAT_INC(sc, type);
 #endif
+               set_bit(SC_OP_HW_RESET, &sc->sc_flags);
                ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
                goto out;
        }
 
+       spin_lock_irqsave(&sc->sc_pm_lock, flags);
        if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
                /*
                 * TSF sync does not look correct; remain awake to sync with
@@ -704,6 +391,7 @@ void ath9k_tasklet(unsigned long data)
                ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
                sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
        }
+       spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 
        if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
                rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
@@ -765,15 +453,17 @@ irqreturn_t ath_isr(int irq, void *dev)
         * touch anything. Note this can happen early
         * on if the IRQ is shared.
         */
-       if (sc->sc_flags & SC_OP_INVALID)
+       if (test_bit(SC_OP_INVALID, &sc->sc_flags))
                return IRQ_NONE;
 
-
        /* shared irq, not for us */
 
        if (!ath9k_hw_intrpend(ah))
                return IRQ_NONE;
 
+       if(test_bit(SC_OP_HW_RESET, &sc->sc_flags))
+               return IRQ_HANDLED;
+
        /*
         * Figure out the reason(s) for the interrupt.  Note
         * that the hal returns a pseudo-ISR that may include
@@ -851,8 +541,10 @@ irqreturn_t ath_isr(int irq, void *dev)
                        /* Clear RxAbort bit so that we can
                         * receive frames */
                        ath9k_setpower(sc, ATH9K_PM_AWAKE);
+                       spin_lock(&sc->sc_pm_lock);
                        ath9k_hw_setrxabort(sc->sc_ah, 0);
                        sc->ps_flags |= PS_WAIT_FOR_BEACON;
+                       spin_unlock(&sc->sc_pm_lock);
                }
 
 chip_reset:
@@ -901,87 +593,6 @@ void ath_reset_work(struct work_struct *work)
        ath_reset(sc, true);
 }
 
-void ath_hw_check(struct work_struct *work)
-{
-       struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
-       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-       unsigned long flags;
-       int busy;
-       u8 is_alive, nbeacon = 1;
-
-       ath9k_ps_wakeup(sc);
-       is_alive = ath9k_hw_check_alive(sc->sc_ah);
-
-       if (is_alive && !AR_SREV_9300(sc->sc_ah))
-               goto out;
-       else if (!is_alive && AR_SREV_9300(sc->sc_ah)) {
-               ath_dbg(common, RESET,
-                       "DCU stuck is detected. Schedule chip reset\n");
-               RESET_STAT_INC(sc, RESET_TYPE_MAC_HANG);
-               goto sched_reset;
-       }
-
-       spin_lock_irqsave(&common->cc_lock, flags);
-       busy = ath_update_survey_stats(sc);
-       spin_unlock_irqrestore(&common->cc_lock, flags);
-
-       ath_dbg(common, RESET, "Possible baseband hang, busy=%d (try %d)\n",
-               busy, sc->hw_busy_count + 1);
-       if (busy >= 99) {
-               if (++sc->hw_busy_count >= 3) {
-                       RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
-                       goto sched_reset;
-               }
-       } else if (busy >= 0) {
-               sc->hw_busy_count = 0;
-               nbeacon = 3;
-       }
-
-       ath_start_rx_poll(sc, nbeacon);
-       goto out;
-
-sched_reset:
-       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
-out:
-       ath9k_ps_restore(sc);
-}
-
-static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
-{
-       static int count;
-       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-
-       if (pll_sqsum >= 0x40000) {
-               count++;
-               if (count == 3) {
-                       /* Rx is hung for more than 500ms. Reset it */
-                       ath_dbg(common, RESET, "Possible RX hang, resetting\n");
-                       RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
-                       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
-                       count = 0;
-               }
-       } else
-               count = 0;
-}
-
-void ath_hw_pll_work(struct work_struct *work)
-{
-       struct ath_softc *sc = container_of(work, struct ath_softc,
-                                           hw_pll_work.work);
-       u32 pll_sqsum;
-
-       if (AR_SREV_9485(sc->sc_ah)) {
-
-               ath9k_ps_wakeup(sc);
-               pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
-               ath9k_ps_restore(sc);
-
-               ath_hw_pll_rx_hang_check(sc, pll_sqsum);
-
-               ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
-       }
-}
-
 /**********************/
 /* mac80211 callbacks */
 /**********************/
@@ -1044,10 +655,9 @@ static int ath9k_start(struct ieee80211_hw *hw)
        if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
                ah->imask |= ATH9K_INT_CST;
 
-       if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
-               ah->imask |= ATH9K_INT_MCI;
+       ath_mci_enable(sc);
 
-       sc->sc_flags &= ~SC_OP_INVALID;
+       clear_bit(SC_OP_INVALID, &sc->sc_flags);
        sc->sc_ah->is_monitoring = false;
 
        if (!ath_complete_reset(sc, false)) {
@@ -1089,6 +699,7 @@ static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_tx_control txctl;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+       unsigned long flags;
 
        if (sc->ps_enabled) {
                /*
@@ -1111,6 +722,7 @@ static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
                 * completed and if needed, also for RX of buffered frames.
                 */
                ath9k_ps_wakeup(sc);
+               spin_lock_irqsave(&sc->sc_pm_lock, flags);
                if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
                        ath9k_hw_setrxabort(sc->sc_ah, 0);
                if (ieee80211_is_pspoll(hdr->frame_control)) {
@@ -1126,6 +738,7 @@ static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
                 * the ps_flags bit is cleared. We are just dropping
                 * the ps_usecount here.
                 */
+               spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
                ath9k_ps_restore(sc);
        }
 
@@ -1166,7 +779,7 @@ static void ath9k_stop(struct ieee80211_hw *hw)
        ath_cancel_work(sc);
        del_timer_sync(&sc->rx_poll_timer);
 
-       if (sc->sc_flags & SC_OP_INVALID) {
+       if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
                ath_dbg(common, ANY, "Device not present\n");
                mutex_unlock(&sc->mutex);
                return;
@@ -1223,7 +836,7 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 
        ath9k_ps_restore(sc);
 
-       sc->sc_flags |= SC_OP_INVALID;
+       set_bit(SC_OP_INVALID, &sc->sc_flags);
        sc->ps_idle = prev_idle;
 
        mutex_unlock(&sc->mutex);
@@ -1327,11 +940,11 @@ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
        /* Set op-mode & TSF */
        if (iter_data.naps > 0) {
                ath9k_hw_set_tsfadjust(ah, 1);
-               sc->sc_flags |= SC_OP_TSF_RESET;
+               set_bit(SC_OP_TSF_RESET, &sc->sc_flags);
                ah->opmode = NL80211_IFTYPE_AP;
        } else {
                ath9k_hw_set_tsfadjust(ah, 0);
-               sc->sc_flags &= ~SC_OP_TSF_RESET;
+               clear_bit(SC_OP_TSF_RESET, &sc->sc_flags);
 
                if (iter_data.nmeshes)
                        ah->opmode = NL80211_IFTYPE_MESH_POINT;
@@ -1362,12 +975,12 @@ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
                sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 
                if (!common->disable_ani) {
-                       sc->sc_flags |= SC_OP_ANI_RUN;
+                       set_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                        ath_start_ani(common);
                }
 
        } else {
-               sc->sc_flags &= ~SC_OP_ANI_RUN;
+               clear_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                del_timer_sync(&common->ani.timer);
        }
 }
@@ -1388,25 +1001,6 @@ static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
        }
 }
 
-void ath_start_rx_poll(struct ath_softc *sc, u8 nbeacon)
-{
-       if (!AR_SREV_9300(sc->sc_ah))
-               return;
-
-       if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF))
-               return;
-
-       mod_timer(&sc->rx_poll_timer, jiffies + msecs_to_jiffies
-                       (nbeacon * sc->cur_beacon_conf.beacon_interval));
-}
-
-void ath_rx_poll(unsigned long data)
-{
-       struct ath_softc *sc = (struct ath_softc *)data;
-
-       ieee80211_queue_work(sc->hw, &sc->hw_check_work);
-}
-
 static int ath9k_add_interface(struct ieee80211_hw *hw,
                               struct ieee80211_vif *vif)
 {
@@ -1442,15 +1036,6 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
                }
        }
 
-       if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
-           ((vif->type == NL80211_IFTYPE_ADHOC) &&
-            sc->nvifs > 0)) {
-               ath_err(common, "Cannot create ADHOC interface when other"
-                       " interfaces already exist.\n");
-               ret = -EINVAL;
-               goto out;
-       }
-
        ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
 
        sc->nvifs++;
@@ -1475,15 +1060,6 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
        mutex_lock(&sc->mutex);
        ath9k_ps_wakeup(sc);
 
-       /* See if new interface type is valid. */
-       if ((new_type == NL80211_IFTYPE_ADHOC) &&
-           (sc->nvifs > 1)) {
-               ath_err(common, "When using ADHOC, it must be the only"
-                       " interface.\n");
-               ret = -EINVAL;
-               goto out;
-       }
-
        if (ath9k_uses_beacons(new_type) &&
            !ath9k_uses_beacons(vif->type)) {
                if (sc->nbcnvifs >= ATH_BCBUF) {
@@ -1626,11 +1202,6 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
                if (ah->curchan)
                        old_pos = ah->curchan - &ah->channels[0];
 
-               if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
-                       sc->sc_flags |= SC_OP_OFFCHANNEL;
-               else
-                       sc->sc_flags &= ~SC_OP_OFFCHANNEL;
-
                ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
                        curchan->center_freq, conf->channel_type);
 
@@ -1672,6 +1243,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
                if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
                        ath_err(common, "Unable to set channel\n");
                        mutex_unlock(&sc->mutex);
+                       ath9k_ps_restore(sc);
                        return -EINVAL;
                }
 
@@ -1910,16 +1482,16 @@ static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
        struct ath_vif *avp = (void *)vif->drv_priv;
-
+       unsigned long flags;
        /*
         * Skip iteration if primary station vif's bss info
         * was not changed
         */
-       if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
+       if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags))
                return;
 
        if (bss_conf->assoc) {
-               sc->sc_flags |= SC_OP_PRIM_STA_VIF;
+               set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
                avp->primary_sta_vif = true;
                memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
                common->curaid = bss_conf->aid;
@@ -1932,7 +1504,10 @@ static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
                 * on the receipt of the first Beacon frame (i.e.,
                 * after time sync with the AP).
                 */
+               spin_lock_irqsave(&sc->sc_pm_lock, flags);
                sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
+               spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+
                /* Reset rssi stats */
                sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
                sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
@@ -1940,7 +1515,7 @@ static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
                ath_start_rx_poll(sc, 3);
 
                if (!common->disable_ani) {
-                       sc->sc_flags |= SC_OP_ANI_RUN;
+                       set_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                        ath_start_ani(common);
                }
 
@@ -1960,7 +1535,8 @@ static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
        if (avp->primary_sta_vif && !bss_conf->assoc) {
                ath_dbg(common, CONFIG, "Bss Info DISASSOC %d, bssid %pM\n",
                        common->curaid, common->curbssid);
-               sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
+               clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
+               clear_bit(SC_OP_BEACONS, &sc->sc_flags);
                avp->primary_sta_vif = false;
                memset(common->curbssid, 0, ETH_ALEN);
                common->curaid = 0;
@@ -1973,10 +1549,9 @@ static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
         * None of station vifs are associated.
         * Clear bssid & aid
         */
-       if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
+       if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
                ath9k_hw_write_associd(sc->sc_ah);
-               /* Stop ANI */
-               sc->sc_flags &= ~SC_OP_ANI_RUN;
+               clear_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                del_timer_sync(&common->ani.timer);
                del_timer_sync(&sc->rx_poll_timer);
                memset(&sc->caldata, 0, sizeof(sc->caldata));
@@ -2014,12 +1589,12 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
                        sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 
                        if (!common->disable_ani) {
-                               sc->sc_flags |= SC_OP_ANI_RUN;
+                               set_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                                ath_start_ani(common);
                        }
 
                } else {
-                       sc->sc_flags &= ~SC_OP_ANI_RUN;
+                       clear_bit(SC_OP_ANI_RUN, &sc->sc_flags);
                        del_timer_sync(&common->ani.timer);
                        del_timer_sync(&sc->rx_poll_timer);
                }
@@ -2031,7 +1606,7 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
         */
        if ((changed & BSS_CHANGED_BEACON_INT) &&
            (vif->type == NL80211_IFTYPE_AP))
-               sc->sc_flags |= SC_OP_TSF_RESET;
+               set_bit(SC_OP_TSF_RESET, &sc->sc_flags);
 
        /* Configure beaconing (AP, IBSS, MESH) */
        if (ath9k_uses_beacons(vif->type) &&
@@ -2223,7 +1798,7 @@ static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
                return;
        }
 
-       if (sc->sc_flags & SC_OP_INVALID) {
+       if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
                ath_dbg(common, ANY, "Device not present\n");
                mutex_unlock(&sc->mutex);
                return;
@@ -2388,6 +1963,134 @@ static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
        return 0;
 }
 
+#ifdef CONFIG_ATH9K_DEBUGFS
+
+/* Ethtool support for get-stats */
+
+#define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO"
+static const char ath9k_gstrings_stats[][ETH_GSTRING_LEN] = {
+       "tx_pkts_nic",
+       "tx_bytes_nic",
+       "rx_pkts_nic",
+       "rx_bytes_nic",
+       AMKSTR(d_tx_pkts),
+       AMKSTR(d_tx_bytes),
+       AMKSTR(d_tx_mpdus_queued),
+       AMKSTR(d_tx_mpdus_completed),
+       AMKSTR(d_tx_mpdu_xretries),
+       AMKSTR(d_tx_aggregates),
+       AMKSTR(d_tx_ampdus_queued_hw),
+       AMKSTR(d_tx_ampdus_queued_sw),
+       AMKSTR(d_tx_ampdus_completed),
+       AMKSTR(d_tx_ampdu_retries),
+       AMKSTR(d_tx_ampdu_xretries),
+       AMKSTR(d_tx_fifo_underrun),
+       AMKSTR(d_tx_op_exceeded),
+       AMKSTR(d_tx_timer_expiry),
+       AMKSTR(d_tx_desc_cfg_err),
+       AMKSTR(d_tx_data_underrun),
+       AMKSTR(d_tx_delim_underrun),
+
+       "d_rx_decrypt_crc_err",
+       "d_rx_phy_err",
+       "d_rx_mic_err",
+       "d_rx_pre_delim_crc_err",
+       "d_rx_post_delim_crc_err",
+       "d_rx_decrypt_busy_err",
+
+       "d_rx_phyerr_radar",
+       "d_rx_phyerr_ofdm_timing",
+       "d_rx_phyerr_cck_timing",
+
+};
+#define ATH9K_SSTATS_LEN ARRAY_SIZE(ath9k_gstrings_stats)
+
+static void ath9k_get_et_strings(struct ieee80211_hw *hw,
+                                struct ieee80211_vif *vif,
+                                u32 sset, u8 *data)
+{
+       if (sset == ETH_SS_STATS)
+               memcpy(data, *ath9k_gstrings_stats,
+                      sizeof(ath9k_gstrings_stats));
+}
+
+static int ath9k_get_et_sset_count(struct ieee80211_hw *hw,
+                                  struct ieee80211_vif *vif, int sset)
+{
+       if (sset == ETH_SS_STATS)
+               return ATH9K_SSTATS_LEN;
+       return 0;
+}
+
+#define PR_QNUM(_n) (sc->tx.txq_map[_n]->axq_qnum)
+#define AWDATA(elem)                                                   \
+       do {                                                            \
+               data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].elem; \
+               data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].elem; \
+               data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].elem; \
+               data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].elem; \
+       } while (0)
+
+#define AWDATA_RX(elem)                                                \
+       do {                                                    \
+               data[i++] = sc->debug.stats.rxstats.elem;       \
+       } while (0)
+
+static void ath9k_get_et_stats(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif,
+                              struct ethtool_stats *stats, u64 *data)
+{
+       struct ath_softc *sc = hw->priv;
+       int i = 0;
+
+       data[i++] = (sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].tx_pkts_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].tx_pkts_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].tx_pkts_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].tx_pkts_all);
+       data[i++] = (sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].tx_bytes_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].tx_bytes_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].tx_bytes_all +
+                    sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].tx_bytes_all);
+       AWDATA_RX(rx_pkts_all);
+       AWDATA_RX(rx_bytes_all);
+
+       AWDATA(tx_pkts_all);
+       AWDATA(tx_bytes_all);
+       AWDATA(queued);
+       AWDATA(completed);
+       AWDATA(xretries);
+       AWDATA(a_aggr);
+       AWDATA(a_queued_hw);
+       AWDATA(a_queued_sw);
+       AWDATA(a_completed);
+       AWDATA(a_retries);
+       AWDATA(a_xretries);
+       AWDATA(fifo_underrun);
+       AWDATA(xtxop);
+       AWDATA(timer_exp);
+       AWDATA(desc_cfg_err);
+       AWDATA(data_underrun);
+       AWDATA(delim_underrun);
+
+       AWDATA_RX(decrypt_crc_err);
+       AWDATA_RX(phy_err);
+       AWDATA_RX(mic_err);
+       AWDATA_RX(pre_delim_crc_err);
+       AWDATA_RX(post_delim_crc_err);
+       AWDATA_RX(decrypt_busy_err);
+
+       AWDATA_RX(phy_err_stats[ATH9K_PHYERR_RADAR]);
+       AWDATA_RX(phy_err_stats[ATH9K_PHYERR_OFDM_TIMING]);
+       AWDATA_RX(phy_err_stats[ATH9K_PHYERR_CCK_TIMING]);
+
+       WARN_ON(i != ATH9K_SSTATS_LEN);
+}
+
+/* End of ethtool get-stats functions */
+
+#endif
+
+
 struct ieee80211_ops ath9k_ops = {
        .tx                 = ath9k_tx,
        .start              = ath9k_start,
@@ -2416,4 +2119,10 @@ struct ieee80211_ops ath9k_ops = {
        .get_stats          = ath9k_get_stats,
        .set_antenna        = ath9k_set_antenna,
        .get_antenna        = ath9k_get_antenna,
+
+#ifdef CONFIG_ATH9K_DEBUGFS
+       .get_et_sset_count  = ath9k_get_et_sset_count,
+       .get_et_stats  = ath9k_get_et_stats,
+       .get_et_strings  = ath9k_get_et_strings,
+#endif
 };
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