diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 2394 |
1 files changed, 2394 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c new file mode 100644 index 0000000..0f7aa35 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -0,0 +1,2394 @@ +/* + * Copyright (c) 2008-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/nl80211.h> +#include <linux/delay.h> +#include "ath9k.h" +#include "btcoex.h" + +static void ath9k_set_assoc_state(struct ath_softc *sc, + struct ieee80211_vif *vif); + +u8 ath9k_parse_mpdudensity(u8 mpdudensity) +{ + /* + * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing": + * 0 for no restriction + * 1 for 1/4 us + * 2 for 1/2 us + * 3 for 1 us + * 4 for 2 us + * 5 for 4 us + * 6 for 8 us + * 7 for 16 us + */ + switch (mpdudensity) { + case 0: + return 0; + case 1: + case 2: + case 3: + /* Our lower layer calculations limit our precision to + 1 microsecond */ + return 1; + case 4: + return 2; + case 5: + return 4; + case 6: + return 8; + case 7: + return 16; + default: + return 0; + } +} + +static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq) +{ + bool pending = false; + + spin_lock_bh(&txq->axq_lock); + + if (txq->axq_depth || !list_empty(&txq->axq_acq)) + pending = true; + + spin_unlock_bh(&txq->axq_lock); + return pending; +} + +static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode) +{ + unsigned long flags; + bool ret; + + spin_lock_irqsave(&sc->sc_pm_lock, flags); + ret = ath9k_hw_setpower(sc->sc_ah, mode); + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + + return ret; +} + +void ath9k_ps_wakeup(struct ath_softc *sc) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + unsigned long flags; + enum ath9k_power_mode power_mode; + + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if (++sc->ps_usecount != 1) + goto unlock; + + power_mode = sc->sc_ah->power_mode; + ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE); + + /* + * While the hardware is asleep, the cycle counters contain no + * useful data. Better clear them now so that they don't mess up + * survey data results. + */ + if (power_mode != ATH9K_PM_AWAKE) { + 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); + } + + unlock: + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); +} + +void ath9k_ps_restore(struct ath_softc *sc) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + enum ath9k_power_mode mode; + unsigned long flags; + bool reset; + + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if (--sc->ps_usecount != 0) + goto unlock; + + if (sc->ps_idle) { + ath9k_hw_setrxabort(sc->sc_ah, 1); + ath9k_hw_stopdmarecv(sc->sc_ah, &reset); + mode = ATH9K_PM_FULL_SLEEP; + } else if (sc->ps_enabled && + !(sc->ps_flags & (PS_WAIT_FOR_BEACON | + PS_WAIT_FOR_CAB | + PS_WAIT_FOR_PSPOLL_DATA | + PS_WAIT_FOR_TX_ACK | + PS_WAIT_FOR_ANI))) { + mode = ATH9K_PM_NETWORK_SLEEP; + if (ath9k_hw_btcoex_is_enabled(sc->sc_ah)) + ath9k_btcoex_stop_gen_timer(sc); + } else { + goto unlock; + } + + spin_lock(&common->cc_lock); + ath_hw_cycle_counters_update(common); + spin_unlock(&common->cc_lock); + + ath9k_hw_setpower(sc->sc_ah, mode); + + unlock: + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); +} + +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 CPTCFG_ATH9K_BTCOEX_SUPPORT + if (ath9k_hw_mci_is_enabled(sc->sc_ah)) + cancel_work_sync(&sc->mci_work); +#endif +} + +static void ath_cancel_work(struct ath_softc *sc) +{ + __ath_cancel_work(sc); + cancel_work_sync(&sc->hw_reset_work); +} + +static void ath_restart_work(struct ath_softc *sc) +{ + ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0); + + if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(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); + ath_start_ani(sc); +} + +static bool ath_prepare_reset(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + bool ret = true; + + ieee80211_stop_queues(sc->hw); + + sc->hw_busy_count = 0; + ath_stop_ani(sc); + del_timer_sync(&sc->rx_poll_timer); + + ath9k_debug_samp_bb_mac(sc); + ath9k_hw_disable_interrupts(ah); + + if (!ath_drain_all_txq(sc)) + ret = false; + + if (!ath_stoprecv(sc)) + ret = false; + + return ret; +} + +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; + int i; + + if (ath_startrecv(sc) != 0) { + ath_err(common, "Unable to restart recv logic\n"); + return false; + } + + 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->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) { + if (!test_bit(SC_OP_BEACONS, &sc->sc_flags)) + goto work; + + 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); + } else { + ath9k_set_beacon(sc); + } + work: + ath_restart_work(sc); + + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (!ATH_TXQ_SETUP(sc, i)) + continue; + + spin_lock_bh(&sc->tx.txq[i].axq_lock); + ath_txq_schedule(sc, &sc->tx.txq[i]); + spin_unlock_bh(&sc->tx.txq[i].axq_lock); + } + } + + 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; +} + +static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_cal_data *caldata = NULL; + bool fastcc = true; + int r; + + __ath_cancel_work(sc); + + tasklet_disable(&sc->intr_tq); + spin_lock_bh(&sc->sc_pcu_lock); + + if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) { + fastcc = false; + caldata = &sc->caldata; + } + + if (!hchan) { + fastcc = false; + hchan = ah->curchan; + } + + if (!ath_prepare_reset(sc)) + fastcc = false; + + ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n", + hchan->channel, IS_CHAN_HT40(hchan), fastcc); + + r = ath9k_hw_reset(ah, hchan, caldata, fastcc); + if (r) { + ath_err(common, + "Unable to reset channel, reset status %d\n", r); + + ath9k_hw_enable_interrupts(ah); + ath9k_queue_reset(sc, RESET_TYPE_BB_HANG); + + goto out; + } + + if (ath9k_hw_mci_is_enabled(sc->sc_ah) && + (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) + ath9k_mci_set_txpower(sc, true, false); + + if (!ath_complete_reset(sc, true)) + r = -EIO; + +out: + spin_unlock_bh(&sc->sc_pcu_lock); + tasklet_enable(&sc->intr_tq); + + return r; +} + + +/* + * Set/change channels. If the channel is really being changed, it's done + * by reseting the chip. To accomplish this we must first cleanup any pending + * DMA, then restart stuff. +*/ +static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw, + struct ath9k_channel *hchan) +{ + int r; + + if (test_bit(SC_OP_INVALID, &sc->sc_flags)) + return -EIO; + + r = ath_reset_internal(sc, hchan); + + return r; +} + +static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta, + struct ieee80211_vif *vif) +{ + struct ath_node *an; + an = (struct ath_node *)sta->drv_priv; + + an->sc = sc; + an->sta = sta; + an->vif = vif; + + ath_tx_node_init(sc, an); + + if (sta->ht_cap.ht_supported) { + an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + + sta->ht_cap.ampdu_factor); + an->mpdudensity = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density); + } +} + +static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta) +{ + struct ath_node *an = (struct ath_node *)sta->drv_priv; + 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); + enum ath_reset_type type; + unsigned long flags; + u32 status = sc->intrstatus; + u32 rxmask; + + ath9k_ps_wakeup(sc); + spin_lock(&sc->sc_pcu_lock); + + if ((status & ATH9K_INT_FATAL) || + (status & ATH9K_INT_BB_WATCHDOG)) { + + if (status & ATH9K_INT_FATAL) + type = RESET_TYPE_FATAL_INT; + else + type = RESET_TYPE_BB_WATCHDOG; + + ath9k_queue_reset(sc, type); + 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 + * the next Beacon. + */ + 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 | + ATH9K_INT_RXORN); + else + rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN); + + if (status & rxmask) { + /* Check for high priority Rx first */ + if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && + (status & ATH9K_INT_RXHP)) + ath_rx_tasklet(sc, 0, true); + + ath_rx_tasklet(sc, 0, false); + } + + if (status & ATH9K_INT_TX) { + if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) + ath_tx_edma_tasklet(sc); + else + ath_tx_tasklet(sc); + } + + ath9k_btcoex_handle_interrupt(sc, status); + +out: + /* re-enable hardware interrupt */ + ath9k_hw_enable_interrupts(ah); + + spin_unlock(&sc->sc_pcu_lock); + ath9k_ps_restore(sc); +} + +irqreturn_t ath_isr(int irq, void *dev) +{ +#define SCHED_INTR ( \ + ATH9K_INT_FATAL | \ + ATH9K_INT_BB_WATCHDOG | \ + ATH9K_INT_RXORN | \ + ATH9K_INT_RXEOL | \ + ATH9K_INT_RX | \ + ATH9K_INT_RXLP | \ + ATH9K_INT_RXHP | \ + ATH9K_INT_TX | \ + ATH9K_INT_BMISS | \ + ATH9K_INT_CST | \ + ATH9K_INT_TSFOOR | \ + ATH9K_INT_GENTIMER | \ + ATH9K_INT_MCI) + + struct ath_softc *sc = dev; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + enum ath9k_int status; + bool sched = false; + + /* + * The hardware is not ready/present, don't + * touch anything. Note this can happen early + * on if the IRQ is shared. + */ + 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)) { + ath9k_hw_kill_interrupts(ah); + return IRQ_HANDLED; + } + + /* + * Figure out the reason(s) for the interrupt. Note + * that the hal returns a pseudo-ISR that may include + * bits we haven't explicitly enabled so we mask the + * value to insure we only process bits we requested. + */ + ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */ + status &= ah->imask; /* discard unasked-for bits */ + + /* + * If there are no status bits set, then this interrupt was not + * for me (should have been caught above). + */ + if (!status) + return IRQ_NONE; + + /* Cache the status */ + sc->intrstatus = status; + + if (status & SCHED_INTR) + sched = true; + + /* + * If a FATAL or RXORN interrupt is received, we have to reset the + * chip immediately. + */ + if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) && + !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA))) + goto chip_reset; + + if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && + (status & ATH9K_INT_BB_WATCHDOG)) { + + spin_lock(&common->cc_lock); + ath_hw_cycle_counters_update(common); + ar9003_hw_bb_watchdog_dbg_info(ah); + spin_unlock(&common->cc_lock); + + goto chip_reset; + } +#ifdef CONFIG_PM_SLEEP + if (status & ATH9K_INT_BMISS) { + if (atomic_read(&sc->wow_sleep_proc_intr) == 0) { + ath_dbg(common, ANY, "during WoW we got a BMISS\n"); + atomic_inc(&sc->wow_got_bmiss_intr); + atomic_dec(&sc->wow_sleep_proc_intr); + } + } +#endif + if (status & ATH9K_INT_SWBA) + tasklet_schedule(&sc->bcon_tasklet); + + if (status & ATH9K_INT_TXURN) + ath9k_hw_updatetxtriglevel(ah, true); + + if (status & ATH9K_INT_RXEOL) { + ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); + ath9k_hw_set_interrupts(ah); + } + + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) + if (status & ATH9K_INT_TIM_TIMER) { + if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle)) + goto chip_reset; + /* 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: + + ath_debug_stat_interrupt(sc, status); + + if (sched) { + /* turn off every interrupt */ + ath9k_hw_disable_interrupts(ah); + tasklet_schedule(&sc->intr_tq); + } + + return IRQ_HANDLED; + +#undef SCHED_INTR +} + +static int ath_reset(struct ath_softc *sc) +{ + int r; + + ath9k_ps_wakeup(sc); + r = ath_reset_internal(sc, NULL); + ath9k_ps_restore(sc); + + return r; +} + +void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type) +{ +#ifdef CPTCFG_ATH9K_DEBUGFS + RESET_STAT_INC(sc, type); +#endif + set_bit(SC_OP_HW_RESET, &sc->sc_flags); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); +} + +void ath_reset_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work); + + ath_reset(sc); +} + +/**********************/ +/* mac80211 callbacks */ +/**********************/ + +static int ath9k_start(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ieee80211_channel *curchan = hw->conf.chandef.chan; + struct ath9k_channel *init_channel; + int r; + + ath_dbg(common, CONFIG, + "Starting driver with initial channel: %d MHz\n", + curchan->center_freq); + + ath9k_ps_wakeup(sc); + mutex_lock(&sc->mutex); + + init_channel = ath9k_cmn_get_curchannel(hw, ah); + + /* Reset SERDES registers */ + ath9k_hw_configpcipowersave(ah, false); + + /* + * The basic interface to setting the hardware in a good + * state is ``reset''. On return the hardware is known to + * be powered up and with interrupts disabled. This must + * be followed by initialization of the appropriate bits + * and then setup of the interrupt mask. + */ + spin_lock_bh(&sc->sc_pcu_lock); + + atomic_set(&ah->intr_ref_cnt, -1); + + r = ath9k_hw_reset(ah, init_channel, ah->caldata, false); + if (r) { + ath_err(common, + "Unable to reset hardware; reset status %d (freq %u MHz)\n", + r, curchan->center_freq); + ah->reset_power_on = false; + } + + /* Setup our intr mask. */ + ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL | + ATH9K_INT_RXORN | ATH9K_INT_FATAL | + ATH9K_INT_GLOBAL; + + if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) + ah->imask |= ATH9K_INT_RXHP | + ATH9K_INT_RXLP | + ATH9K_INT_BB_WATCHDOG; + else + ah->imask |= ATH9K_INT_RX; + + ah->imask |= ATH9K_INT_GTT; + + if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) + ah->imask |= ATH9K_INT_CST; + + ath_mci_enable(sc); + + clear_bit(SC_OP_INVALID, &sc->sc_flags); + sc->sc_ah->is_monitoring = false; + + if (!ath_complete_reset(sc, false)) + ah->reset_power_on = false; + + if (ah->led_pin >= 0) { + ath9k_hw_cfg_output(ah, ah->led_pin, + AR_GPIO_OUTPUT_MUX_AS_OUTPUT); + ath9k_hw_set_gpio(ah, ah->led_pin, 0); + } + + /* + * Reset key cache to sane defaults (all entries cleared) instead of + * semi-random values after suspend/resume. + */ + ath9k_cmn_init_crypto(sc->sc_ah); + + spin_unlock_bh(&sc->sc_pcu_lock); + + mutex_unlock(&sc->mutex); + + ath9k_ps_restore(sc); + + return 0; +} + +static void ath9k_tx(struct ieee80211_hw *hw, + struct ieee80211_tx_control *control, + struct sk_buff *skb) +{ + struct ath_softc *sc = hw->priv; + 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) { + /* + * mac80211 does not set PM field for normal data frames, so we + * need to update that based on the current PS mode. + */ + if (ieee80211_is_data(hdr->frame_control) && + !ieee80211_is_nullfunc(hdr->frame_control) && + !ieee80211_has_pm(hdr->frame_control)) { + ath_dbg(common, PS, + "Add PM=1 for a TX frame while in PS mode\n"); + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); + } + } + + if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) { + /* + * We are using PS-Poll and mac80211 can request TX while in + * power save mode. Need to wake up hardware for the TX to be + * 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)) { + ath_dbg(common, PS, + "Sending PS-Poll to pick a buffered frame\n"); + sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA; + } else { + ath_dbg(common, PS, "Wake up to complete TX\n"); + sc->ps_flags |= PS_WAIT_FOR_TX_ACK; + } + /* + * The actual restore operation will happen only after + * 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); + } + + /* + * Cannot tx while the hardware is in full sleep, it first needs a full + * chip reset to recover from that + */ + if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) { + ath_err(common, "TX while HW is in FULL_SLEEP mode\n"); + goto exit; + } + + memset(&txctl, 0, sizeof(struct ath_tx_control)); + txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)]; + txctl.sta = control->sta; + + ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb); + + if (ath_tx_start(hw, skb, &txctl) != 0) { + ath_dbg(common, XMIT, "TX failed\n"); + TX_STAT_INC(txctl.txq->axq_qnum, txfailed); + goto exit; + } + + return; +exit: + ieee80211_free_txskb(hw, skb); +} + +static void ath9k_stop(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + bool prev_idle; + + mutex_lock(&sc->mutex); + + ath_cancel_work(sc); + del_timer_sync(&sc->rx_poll_timer); + + if (test_bit(SC_OP_INVALID, &sc->sc_flags)) { + ath_dbg(common, ANY, "Device not present\n"); + mutex_unlock(&sc->mutex); + return; + } + + /* Ensure HW is awake when we try to shut it down. */ + ath9k_ps_wakeup(sc); + + spin_lock_bh(&sc->sc_pcu_lock); + + /* prevent tasklets to enable interrupts once we disable them */ + ah->imask &= ~ATH9K_INT_GLOBAL; + + /* make sure h/w will not generate any interrupt + * before setting the invalid flag. */ + ath9k_hw_disable_interrupts(ah); + + spin_unlock_bh(&sc->sc_pcu_lock); + + /* we can now sync irq and kill any running tasklets, since we already + * disabled interrupts and not holding a spin lock */ + synchronize_irq(sc->irq); + tasklet_kill(&sc->intr_tq); + tasklet_kill(&sc->bcon_tasklet); + + prev_idle = sc->ps_idle; + sc->ps_idle = true; + + spin_lock_bh(&sc->sc_pcu_lock); + + if (ah->led_pin >= 0) { + ath9k_hw_set_gpio(ah, ah->led_pin, 1); + ath9k_hw_cfg_gpio_input(ah, ah->led_pin); + } + + ath_prepare_reset(sc); + + if (sc->rx.frag) { + dev_kfree_skb_any(sc->rx.frag); + sc->rx.frag = NULL; + } + + if (!ah->curchan) + ah->curchan = ath9k_cmn_get_curchannel(hw, ah); + + ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); + ath9k_hw_phy_disable(ah); + + ath9k_hw_configpcipowersave(ah, true); + + spin_unlock_bh(&sc->sc_pcu_lock); + + ath9k_ps_restore(sc); + + set_bit(SC_OP_INVALID, &sc->sc_flags); + sc->ps_idle = prev_idle; + + mutex_unlock(&sc->mutex); + + ath_dbg(common, CONFIG, "Driver halt\n"); +} + +bool ath9k_uses_beacons(int type) +{ + switch (type) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_ADHOC: + case NL80211_IFTYPE_MESH_POINT: + return true; + default: + return false; + } +} + +static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct ath9k_vif_iter_data *iter_data = data; + int i; + + if (iter_data->has_hw_macaddr) { + for (i = 0; i < ETH_ALEN; i++) + iter_data->mask[i] &= + ~(iter_data->hw_macaddr[i] ^ mac[i]); + } else { + memcpy(iter_data->hw_macaddr, mac, ETH_ALEN); + iter_data->has_hw_macaddr = true; + } + + switch (vif->type) { + case NL80211_IFTYPE_AP: + iter_data->naps++; + break; + case NL80211_IFTYPE_STATION: + iter_data->nstations++; + break; + case NL80211_IFTYPE_ADHOC: + iter_data->nadhocs++; + break; + case NL80211_IFTYPE_MESH_POINT: + iter_data->nmeshes++; + break; + case NL80211_IFTYPE_WDS: + iter_data->nwds++; + break; + default: + break; + } +} + +static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct ath_softc *sc = data; + struct ath_vif *avp = (void *)vif->drv_priv; + + if (vif->type != NL80211_IFTYPE_STATION) + return; + + if (avp->primary_sta_vif) + ath9k_set_assoc_state(sc, vif); +} + +/* Called with sc->mutex held. */ +void ath9k_calculate_iter_data(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ath9k_vif_iter_data *iter_data) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + + /* + * Use the hardware MAC address as reference, the hardware uses it + * together with the BSSID mask when matching addresses. + */ + memset(iter_data, 0, sizeof(*iter_data)); + memset(&iter_data->mask, 0xff, ETH_ALEN); + + if (vif) + ath9k_vif_iter(iter_data, vif->addr, vif); + + /* Get list of all active MAC addresses */ + ieee80211_iterate_active_interfaces_atomic( + sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + ath9k_vif_iter, iter_data); + + memcpy(common->macaddr, iter_data->hw_macaddr, ETH_ALEN); +} + +/* Called with sc->mutex held. */ +static void ath9k_calculate_summary_state(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_vif_iter_data iter_data; + enum nl80211_iftype old_opmode = ah->opmode; + + ath9k_calculate_iter_data(hw, vif, &iter_data); + + memcpy(common->bssidmask, iter_data.mask, ETH_ALEN); + ath_hw_setbssidmask(common); + + if (iter_data.naps > 0) { + ath9k_hw_set_tsfadjust(ah, true); + ah->opmode = NL80211_IFTYPE_AP; + } else { + ath9k_hw_set_tsfadjust(ah, false); + + if (iter_data.nmeshes) + ah->opmode = NL80211_IFTYPE_MESH_POINT; + else if (iter_data.nwds) + ah->opmode = NL80211_IFTYPE_AP; + else if (iter_data.nadhocs) + ah->opmode = NL80211_IFTYPE_ADHOC; + else + ah->opmode = NL80211_IFTYPE_STATION; + } + + ath9k_hw_setopmode(ah); + + if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) + ah->imask |= ATH9K_INT_TSFOOR; + else + ah->imask &= ~ATH9K_INT_TSFOOR; + + ath9k_hw_set_interrupts(ah); + + /* + * If we are changing the opmode to STATION, + * a beacon sync needs to be done. + */ + if (ah->opmode == NL80211_IFTYPE_STATION && + old_opmode == NL80211_IFTYPE_AP && + test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) { + ieee80211_iterate_active_interfaces_atomic( + sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + ath9k_sta_vif_iter, sc); + } +} + +static int ath9k_add_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + + mutex_lock(&sc->mutex); + + ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type); + sc->nvifs++; + + ath9k_ps_wakeup(sc); + ath9k_calculate_summary_state(hw, vif); + ath9k_ps_restore(sc); + + if (ath9k_uses_beacons(vif->type)) + ath9k_beacon_assign_slot(sc, vif); + + mutex_unlock(&sc->mutex); + return 0; +} + +static int ath9k_change_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + enum nl80211_iftype new_type, + bool p2p) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + + ath_dbg(common, CONFIG, "Change Interface\n"); + mutex_lock(&sc->mutex); + + if (ath9k_uses_beacons(vif->type)) + ath9k_beacon_remove_slot(sc, vif); + + vif->type = new_type; + vif->p2p = p2p; + + ath9k_ps_wakeup(sc); + ath9k_calculate_summary_state(hw, vif); + ath9k_ps_restore(sc); + + if (ath9k_uses_beacons(vif->type)) + ath9k_beacon_assign_slot(sc, vif); + + mutex_unlock(&sc->mutex); + return 0; +} + +static void ath9k_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + + ath_dbg(common, CONFIG, "Detach Interface\n"); + + mutex_lock(&sc->mutex); + + sc->nvifs--; + + if (ath9k_uses_beacons(vif->type)) + ath9k_beacon_remove_slot(sc, vif); + + ath9k_ps_wakeup(sc); + ath9k_calculate_summary_state(hw, NULL); + ath9k_ps_restore(sc); + + mutex_unlock(&sc->mutex); +} + +static void ath9k_enable_ps(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + + sc->ps_enabled = true; + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { + if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) { + ah->imask |= ATH9K_INT_TIM_TIMER; + ath9k_hw_set_interrupts(ah); + } + ath9k_hw_setrxabort(ah, 1); + } + ath_dbg(common, PS, "PowerSave enabled\n"); +} + +static void ath9k_disable_ps(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + + sc->ps_enabled = false; + ath9k_hw_setpower(ah, ATH9K_PM_AWAKE); + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { + ath9k_hw_setrxabort(ah, 0); + sc->ps_flags &= ~(PS_WAIT_FOR_BEACON | + PS_WAIT_FOR_CAB | + PS_WAIT_FOR_PSPOLL_DATA | + PS_WAIT_FOR_TX_ACK); + if (ah->imask & ATH9K_INT_TIM_TIMER) { + ah->imask &= ~ATH9K_INT_TIM_TIMER; + ath9k_hw_set_interrupts(ah); + } + } + ath_dbg(common, PS, "PowerSave disabled\n"); +} + +void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + u32 rxfilter; + + if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { + ath_err(common, "spectrum analyzer not implemented on this hardware\n"); + return; + } + + ath9k_ps_wakeup(sc); + rxfilter = ath9k_hw_getrxfilter(ah); + ath9k_hw_setrxfilter(ah, rxfilter | + ATH9K_RX_FILTER_PHYRADAR | + ATH9K_RX_FILTER_PHYERR); + + /* TODO: usually this should not be neccesary, but for some reason + * (or in some mode?) the trigger must be called after the + * configuration, otherwise the register will have its values reset + * (on my ar9220 to value 0x01002310) + */ + ath9k_spectral_scan_config(hw, sc->spectral_mode); + ath9k_hw_ops(ah)->spectral_scan_trigger(ah); + ath9k_ps_restore(sc); +} + +int ath9k_spectral_scan_config(struct ieee80211_hw *hw, + enum spectral_mode spectral_mode) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + + if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { + ath_err(common, "spectrum analyzer not implemented on this hardware\n"); + return -1; + } + + switch (spectral_mode) { + case SPECTRAL_DISABLED: + sc->spec_config.enabled = 0; + break; + case SPECTRAL_BACKGROUND: + /* send endless samples. + * TODO: is this really useful for "background"? + */ + sc->spec_config.endless = 1; + sc->spec_config.enabled = 1; + break; + case SPECTRAL_CHANSCAN: + case SPECTRAL_MANUAL: + sc->spec_config.endless = 0; + sc->spec_config.enabled = 1; + break; + default: + return -1; + } + + ath9k_ps_wakeup(sc); + ath9k_hw_ops(ah)->spectral_scan_config(ah, &sc->spec_config); + ath9k_ps_restore(sc); + + sc->spectral_mode = spectral_mode; + + return 0; +} + +static int ath9k_config(struct ieee80211_hw *hw, u32 changed) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ieee80211_conf *conf = &hw->conf; + bool reset_channel = false; + + ath9k_ps_wakeup(sc); + mutex_lock(&sc->mutex); + + if (changed & IEEE80211_CONF_CHANGE_IDLE) { + sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE); + if (sc->ps_idle) { + ath_cancel_work(sc); + ath9k_stop_btcoex(sc); + } else { + ath9k_start_btcoex(sc); + /* + * The chip needs a reset to properly wake up from + * full sleep + */ + reset_channel = ah->chip_fullsleep; + } + } + + /* + * We just prepare to enable PS. We have to wait until our AP has + * ACK'd our null data frame to disable RX otherwise we'll ignore + * those ACKs and end up retransmitting the same null data frames. + * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode. + */ + if (changed & IEEE80211_CONF_CHANGE_PS) { + unsigned long flags; + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if (conf->flags & IEEE80211_CONF_PS) + ath9k_enable_ps(sc); + else + ath9k_disable_ps(sc); + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + } + + if (changed & IEEE80211_CONF_CHANGE_MONITOR) { + if (conf->flags & IEEE80211_CONF_MONITOR) { + ath_dbg(common, CONFIG, "Monitor mode is enabled\n"); + sc->sc_ah->is_monitoring = true; + } else { + ath_dbg(common, CONFIG, "Monitor mode is disabled\n"); + sc->sc_ah->is_monitoring = false; + } + } + + if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) { + struct ieee80211_channel *curchan = hw->conf.chandef.chan; + enum nl80211_channel_type channel_type = + cfg80211_get_chandef_type(&conf->chandef); + int pos = curchan->hw_value; + int old_pos = -1; + unsigned long flags; + + if (ah->curchan) + old_pos = ah->curchan - &ah->channels[0]; + + ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n", + curchan->center_freq, channel_type); + + /* update survey stats for the old channel before switching */ + spin_lock_irqsave(&common->cc_lock, flags); + ath_update_survey_stats(sc); + spin_unlock_irqrestore(&common->cc_lock, flags); + + ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos], + curchan, channel_type); + + /* + * If the operating channel changes, change the survey in-use flags + * along with it. + * Reset the survey data for the new channel, unless we're switching + * back to the operating channel from an off-channel operation. + */ + if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && + sc->cur_survey != &sc->survey[pos]) { + + if (sc->cur_survey) + sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE; + + sc->cur_survey = &sc->survey[pos]; + + memset(sc->cur_survey, 0, sizeof(struct survey_info)); + sc->cur_survey->filled |= SURVEY_INFO_IN_USE; + } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) { + memset(&sc->survey[pos], 0, sizeof(struct survey_info)); + } + + 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; + } + + /* + * The most recent snapshot of channel->noisefloor for the old + * channel is only available after the hardware reset. Copy it to + * the survey stats now. + */ + if (old_pos >= 0) + ath_update_survey_nf(sc, old_pos); + + /* + * Enable radar pulse detection if on a DFS channel. Spectral + * scanning and radar detection can not be used concurrently. + */ + if (hw->conf.radar_enabled) { + u32 rxfilter; + + /* set HW specific DFS configuration */ + ath9k_hw_set_radar_params(ah); + rxfilter = ath9k_hw_getrxfilter(ah); + rxfilter |= ATH9K_RX_FILTER_PHYRADAR | + ATH9K_RX_FILTER_PHYERR; + ath9k_hw_setrxfilter(ah, rxfilter); + ath_dbg(common, DFS, "DFS enabled at freq %d\n", + curchan->center_freq); + } else { + /* perform spectral scan if requested. */ + if (sc->scanning && + sc->spectral_mode == SPECTRAL_CHANSCAN) + ath9k_spectral_scan_trigger(hw); + } + } + + if (changed & IEEE80211_CONF_CHANGE_POWER) { + ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level); + sc->config.txpowlimit = 2 * conf->power_level; + ath9k_cmn_update_txpow(ah, sc->curtxpow, + sc->config.txpowlimit, &sc->curtxpow); + } + + mutex_unlock(&sc->mutex); + ath9k_ps_restore(sc); + + return 0; +} + +#define SUPPORTED_FILTERS \ + (FIF_PROMISC_IN_BSS | \ + FIF_ALLMULTI | \ + FIF_CONTROL | \ + FIF_PSPOLL | \ + FIF_OTHER_BSS | \ + FIF_BCN_PRBRESP_PROMISC | \ + FIF_PROBE_REQ | \ + FIF_FCSFAIL) + +/* FIXME: sc->sc_full_reset ? */ +static void ath9k_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + u64 multicast) +{ + struct ath_softc *sc = hw->priv; + u32 rfilt; + + changed_flags &= SUPPORTED_FILTERS; + *total_flags &= SUPPORTED_FILTERS; + + sc->rx.rxfilter = *total_flags; + ath9k_ps_wakeup(sc); + rfilt = ath_calcrxfilter(sc); + ath9k_hw_setrxfilter(sc->sc_ah, rfilt); + ath9k_ps_restore(sc); + + ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n", + rfilt); +} + +static int ath9k_sta_add(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_node *an = (struct ath_node *) sta->drv_priv; + struct ieee80211_key_conf ps_key = { }; + int key; + + ath_node_attach(sc, sta, vif); + + if (vif->type != NL80211_IFTYPE_AP && + vif->type != NL80211_IFTYPE_AP_VLAN) + return 0; + + key = ath_key_config(common, vif, sta, &ps_key); + if (key > 0) + an->ps_key = key; + + return 0; +} + +static void ath9k_del_ps_key(struct ath_softc *sc, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_node *an = (struct ath_node *) sta->drv_priv; + struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key }; + + if (!an->ps_key) + return; + + ath_key_delete(common, &ps_key); + an->ps_key = 0; +} + +static int ath9k_sta_remove(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct ath_softc *sc = hw->priv; + + ath9k_del_ps_key(sc, vif, sta); + ath_node_detach(sc, sta); + + return 0; +} + +static void ath9k_sta_notify(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + enum sta_notify_cmd cmd, + struct ieee80211_sta *sta) +{ + struct ath_softc *sc = hw->priv; + struct ath_node *an = (struct ath_node *) sta->drv_priv; + + if (!sta->ht_cap.ht_supported) + return; + + switch (cmd) { + case STA_NOTIFY_SLEEP: + an->sleeping = true; + ath_tx_aggr_sleep(sta, sc, an); + break; + case STA_NOTIFY_AWAKE: + an->sleeping = false; + ath_tx_aggr_wakeup(sc, an); + break; + } +} + +static int ath9k_conf_tx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u16 queue, + const struct ieee80211_tx_queue_params *params) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_txq *txq; + struct ath9k_tx_queue_info qi; + int ret = 0; + + if (queue >= IEEE80211_NUM_ACS) + return 0; + + txq = sc->tx.txq_map[queue]; + + ath9k_ps_wakeup(sc); + mutex_lock(&sc->mutex); + + memset(&qi, 0, sizeof(struct ath9k_tx_queue_info)); + + qi.tqi_aifs = params->aifs; + qi.tqi_cwmin = params->cw_min; + qi.tqi_cwmax = params->cw_max; + qi.tqi_burstTime = params->txop * 32; + + ath_dbg(common, CONFIG, + "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", + queue, txq->axq_qnum, params->aifs, params->cw_min, + params->cw_max, params->txop); + + ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime); + ret = ath_txq_update(sc, txq->axq_qnum, &qi); + if (ret) + ath_err(common, "TXQ Update failed\n"); + + mutex_unlock(&sc->mutex); + ath9k_ps_restore(sc); + + return ret; +} + +static int ath9k_set_key(struct ieee80211_hw *hw, + enum set_key_cmd cmd, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + int ret = 0; + + if (ath9k_modparam_nohwcrypt) + return -ENOSPC; + + if ((vif->type == NL80211_IFTYPE_ADHOC || + vif->type == NL80211_IFTYPE_MESH_POINT) && + (key->cipher == WLAN_CIPHER_SUITE_TKIP || + key->cipher == WLAN_CIPHER_SUITE_CCMP) && + !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { + /* + * For now, disable hw crypto for the RSN IBSS group keys. This + * could be optimized in the future to use a modified key cache + * design to support per-STA RX GTK, but until that gets + * implemented, use of software crypto for group addressed + * frames is a acceptable to allow RSN IBSS to be used. + */ + return -EOPNOTSUPP; + } + + mutex_lock(&sc->mutex); + ath9k_ps_wakeup(sc); + ath_dbg(common, CONFIG, "Set HW Key\n"); + + switch (cmd) { + case SET_KEY: + if (sta) + ath9k_del_ps_key(sc, vif, sta); + + ret = ath_key_config(common, vif, sta, key); + if (ret >= 0) { + key->hw_key_idx = ret; + /* push IV and Michael MIC generation to stack */ + key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; + if (key->cipher == WLAN_CIPHER_SUITE_TKIP) + key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; + if (sc->sc_ah->sw_mgmt_crypto && + key->cipher == WLAN_CIPHER_SUITE_CCMP) + key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; + ret = 0; + } + break; + case DISABLE_KEY: + ath_key_delete(common, key); + break; + default: + ret = -EINVAL; + } + + ath9k_ps_restore(sc); + mutex_unlock(&sc->mutex); + + return ret; +} + +static void ath9k_set_assoc_state(struct ath_softc *sc, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_vif *avp = (void *)vif->drv_priv; + struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; + unsigned long flags; + + set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags); + avp->primary_sta_vif = true; + + /* + * Set the AID, BSSID and do beacon-sync only when + * the HW opmode is STATION. + * + * But the primary bit is set above in any case. + */ + if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) + return; + + memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); + common->curaid = bss_conf->aid; + ath9k_hw_write_associd(sc->sc_ah); + + sc->last_rssi = ATH_RSSI_DUMMY_MARKER; + sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; + + 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); + + if (ath9k_hw_mci_is_enabled(sc->sc_ah)) + ath9k_mci_update_wlan_channels(sc, false); + + ath_dbg(common, CONFIG, + "Primary Station interface: %pM, BSSID: %pM\n", + vif->addr, common->curbssid); +} + +static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct ath_softc *sc = data; + struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; + + if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) + return; + + if (bss_conf->assoc) + ath9k_set_assoc_state(sc, vif); +} + +static void ath9k_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changed) +{ +#define CHECK_ANI \ + (BSS_CHANGED_ASSOC | \ + BSS_CHANGED_IBSS | \ + BSS_CHANGED_BEACON_ENABLED) + + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath_vif *avp = (void *)vif->drv_priv; + int slottime; + + ath9k_ps_wakeup(sc); + mutex_lock(&sc->mutex); + + if (changed & BSS_CHANGED_ASSOC) { + ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n", + bss_conf->bssid, bss_conf->assoc); + + if (avp->primary_sta_vif && !bss_conf->assoc) { + clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags); + avp->primary_sta_vif = false; + + if (ah->opmode == NL80211_IFTYPE_STATION) + clear_bit(SC_OP_BEACONS, &sc->sc_flags); + } + + ieee80211_iterate_active_interfaces_atomic( + sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + ath9k_bss_assoc_iter, sc); + + if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) && + ah->opmode == NL80211_IFTYPE_STATION) { + memset(common->curbssid, 0, ETH_ALEN); + common->curaid = 0; + ath9k_hw_write_associd(sc->sc_ah); + if (ath9k_hw_mci_is_enabled(sc->sc_ah)) + ath9k_mci_update_wlan_channels(sc, true); + } + } + + if (changed & BSS_CHANGED_IBSS) { + memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); + common->curaid = bss_conf->aid; + ath9k_hw_write_associd(sc->sc_ah); + } + + if ((changed & BSS_CHANGED_BEACON_ENABLED) || + (changed & BSS_CHANGED_BEACON_INT)) { + if (ah->opmode == NL80211_IFTYPE_AP && + bss_conf->enable_beacon) + ath9k_set_tsfadjust(sc, vif); + if (ath9k_allow_beacon_config(sc, vif)) + ath9k_beacon_config(sc, vif, changed); + } + + if (changed & BSS_CHANGED_ERP_SLOT) { + if (bss_conf->use_short_slot) + slottime = 9; + else + slottime = 20; + if (vif->type == NL80211_IFTYPE_AP) { + /* + * Defer update, so that connected stations can adjust + * their settings at the same time. + * See beacon.c for more details + */ + sc->beacon.slottime = slottime; + sc->beacon.updateslot = UPDATE; + } else { + ah->slottime = slottime; + ath9k_hw_init_global_settings(ah); + } + } + + if (changed & CHECK_ANI) + ath_check_ani(sc); + + mutex_unlock(&sc->mutex); + ath9k_ps_restore(sc); + +#undef CHECK_ANI +} + +static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + struct ath_softc *sc = hw->priv; + u64 tsf; + + mutex_lock(&sc->mutex); + ath9k_ps_wakeup(sc); + tsf = ath9k_hw_gettsf64(sc->sc_ah); + ath9k_ps_restore(sc); + mutex_unlock(&sc->mutex); + + return tsf; +} + +static void ath9k_set_tsf(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u64 tsf) +{ + struct ath_softc *sc = hw->priv; + + mutex_lock(&sc->mutex); + ath9k_ps_wakeup(sc); + ath9k_hw_settsf64(sc->sc_ah, tsf); + ath9k_ps_restore(sc); + mutex_unlock(&sc->mutex); +} + +static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + struct ath_softc *sc = hw->priv; + + mutex_lock(&sc->mutex); + + ath9k_ps_wakeup(sc); + ath9k_hw_reset_tsf(sc->sc_ah); + ath9k_ps_restore(sc); + + mutex_unlock(&sc->mutex); +} + +static int ath9k_ampdu_action(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + enum ieee80211_ampdu_mlme_action action, + struct ieee80211_sta *sta, + u16 tid, u16 *ssn, u8 buf_size) +{ + struct ath_softc *sc = hw->priv; + bool flush = false; + int ret = 0; + + local_bh_disable(); + + switch (action) { + case IEEE80211_AMPDU_RX_START: + break; + case IEEE80211_AMPDU_RX_STOP: + break; + case IEEE80211_AMPDU_TX_START: + ath9k_ps_wakeup(sc); + ret = ath_tx_aggr_start(sc, sta, tid, ssn); + if (!ret) + ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); + ath9k_ps_restore(sc); + break; + case IEEE80211_AMPDU_TX_STOP_FLUSH: + case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: + flush = true; + case IEEE80211_AMPDU_TX_STOP_CONT: + ath9k_ps_wakeup(sc); + ath_tx_aggr_stop(sc, sta, tid); + if (!flush) + ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); + ath9k_ps_restore(sc); + break; + case IEEE80211_AMPDU_TX_OPERATIONAL: + ath9k_ps_wakeup(sc); + ath_tx_aggr_resume(sc, sta, tid); + ath9k_ps_restore(sc); + break; + default: + ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n"); + } + + local_bh_enable(); + + return ret; +} + +static int ath9k_get_survey(struct ieee80211_hw *hw, int idx, + struct survey_info *survey) +{ + struct ath_softc *sc = hw->priv; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ieee80211_supported_band *sband; + struct ieee80211_channel *chan; + unsigned long flags; + int pos; + + spin_lock_irqsave(&common->cc_lock, flags); + if (idx == 0) + ath_update_survey_stats(sc); + + sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ]; + if (sband && idx >= sband->n_channels) { + idx -= sband->n_channels; + sband = NULL; + } + + if (!sband) + sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ]; + + if (!sband || idx >= sband->n_channels) { + spin_unlock_irqrestore(&common->cc_lock, flags); + return -ENOENT; + } + + chan = &sband->channels[idx]; + pos = chan->hw_value; + memcpy(survey, &sc->survey[pos], sizeof(*survey)); + survey->channel = chan; + spin_unlock_irqrestore(&common->cc_lock, flags); + + return 0; +} + +static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + + mutex_lock(&sc->mutex); + ah->coverage_class = coverage_class; + + ath9k_ps_wakeup(sc); + ath9k_hw_init_global_settings(ah); + ath9k_ps_restore(sc); + + mutex_unlock(&sc->mutex); +} + +static void ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + int timeout = 200; /* ms */ + int i, j; + bool drain_txq; + + mutex_lock(&sc->mutex); + cancel_delayed_work_sync(&sc->tx_complete_work); + + if (ah->ah_flags & AH_UNPLUGGED) { + ath_dbg(common, ANY, "Device has been unplugged!\n"); + mutex_unlock(&sc->mutex); + return; + } + + if (test_bit(SC_OP_INVALID, &sc->sc_flags)) { + ath_dbg(common, ANY, "Device not present\n"); + mutex_unlock(&sc->mutex); + return; + } + + for (j = 0; j < timeout; j++) { + bool npend = false; + + if (j) + usleep_range(1000, 2000); + + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (!ATH_TXQ_SETUP(sc, i)) + continue; + + npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]); + + if (npend) + break; + } + + if (!npend) + break; + } + + if (drop) { + ath9k_ps_wakeup(sc); + spin_lock_bh(&sc->sc_pcu_lock); + drain_txq = ath_drain_all_txq(sc); + spin_unlock_bh(&sc->sc_pcu_lock); + + if (!drain_txq) + ath_reset(sc); + + ath9k_ps_restore(sc); + ieee80211_wake_queues(hw); + } + + ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0); + mutex_unlock(&sc->mutex); +} + +static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + int i; + + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (!ATH_TXQ_SETUP(sc, i)) + continue; + + if (ath9k_has_pending_frames(sc, &sc->tx.txq[i])) + return true; + } + return false; +} + +static int ath9k_tx_last_beacon(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ieee80211_vif *vif; + struct ath_vif *avp; + struct ath_buf *bf; + struct ath_tx_status ts; + bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); + int status; + + vif = sc->beacon.bslot[0]; + if (!vif) + return 0; + + if (!vif->bss_conf.enable_beacon) + return 0; + + avp = (void *)vif->drv_priv; + + if (!sc->beacon.tx_processed && !edma) { + tasklet_disable(&sc->bcon_tasklet); + + bf = avp->av_bcbuf; + if (!bf || !bf->bf_mpdu) + goto skip; + + status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts); + if (status == -EINPROGRESS) + goto skip; + + sc->beacon.tx_processed = true; + sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); + +skip: + tasklet_enable(&sc->bcon_tasklet); + } + + return sc->beacon.tx_last; +} + +static int ath9k_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats; + + stats->dot11ACKFailureCount = mib_stats->ackrcv_bad; + stats->dot11RTSFailureCount = mib_stats->rts_bad; + stats->dot11FCSErrorCount = mib_stats->fcs_bad; + stats->dot11RTSSuccessCount = mib_stats->rts_good; + return 0; +} + +static u32 fill_chainmask(u32 cap, u32 new) +{ + u32 filled = 0; + int i; + + for (i = 0; cap && new; i++, cap >>= 1) { + if (!(cap & BIT(0))) + continue; + + if (new & BIT(0)) + filled |= BIT(i); + + new >>= 1; + } + + return filled; +} + +static bool validate_antenna_mask(struct ath_hw *ah, u32 val) +{ + if (AR_SREV_9300_20_OR_LATER(ah)) + return true; + + switch (val & 0x7) { + case 0x1: + case 0x3: + case 0x7: + return true; + case 0x2: + return (ah->caps.rx_chainmask == 1); + default: + return false; + } +} + +static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + + if (ah->caps.rx_chainmask != 1) + rx_ant |= tx_ant; + + if (!validate_antenna_mask(ah, rx_ant) || !tx_ant) + return -EINVAL; + + sc->ant_rx = rx_ant; + sc->ant_tx = tx_ant; + + if (ah->caps.rx_chainmask == 1) + return 0; + + /* AR9100 runs into calibration issues if not all rx chains are enabled */ + if (AR_SREV_9100(ah)) + ah->rxchainmask = 0x7; + else + ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant); + + ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant); + ath9k_reload_chainmask_settings(sc); + + return 0; +} + +static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) +{ + struct ath_softc *sc = hw->priv; + + *tx_ant = sc->ant_tx; + *rx_ant = sc->ant_rx; + return 0; +} + +#ifdef CONFIG_PM_SLEEP + +static void ath9k_wow_map_triggers(struct ath_softc *sc, + struct cfg80211_wowlan *wowlan, + u32 *wow_triggers) +{ + if (wowlan->disconnect) + *wow_triggers |= AH_WOW_LINK_CHANGE | + AH_WOW_BEACON_MISS; + if (wowlan->magic_pkt) + *wow_triggers |= AH_WOW_MAGIC_PATTERN_EN; + + if (wowlan->n_patterns) + *wow_triggers |= AH_WOW_USER_PATTERN_EN; + + sc->wow_enabled = *wow_triggers; + +} + +static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_capabilities *pcaps = &ah->caps; + int pattern_count = 0; + int i, byte_cnt; + u8 dis_deauth_pattern[MAX_PATTERN_SIZE]; + u8 dis_deauth_mask[MAX_PATTERN_SIZE]; + + memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE); + memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE); + + /* + * Create Dissassociate / Deauthenticate packet filter + * + * 2 bytes 2 byte 6 bytes 6 bytes 6 bytes + * +--------------+----------+---------+--------+--------+---- + * + Frame Control+ Duration + DA + SA + BSSID + + * +--------------+----------+---------+--------+--------+---- + * + * The above is the management frame format for disassociate/ + * deauthenticate pattern, from this we need to match the first byte + * of 'Frame Control' and DA, SA, and BSSID fields + * (skipping 2nd byte of FC and Duration feild. + * + * Disassociate pattern + * -------------------- + * Frame control = 00 00 1010 + * DA, SA, BSSID = x:x:x:x:x:x + * Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x + * | x:x:x:x:x:x -- 22 bytes + * + * Deauthenticate pattern + * ---------------------- + * Frame control = 00 00 1100 + * DA, SA, BSSID = x:x:x:x:x:x + * Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x + * | x:x:x:x:x:x -- 22 bytes + */ + + /* Create Disassociate Pattern first */ + + byte_cnt = 0; + + /* Fill out the mask with all FF's */ + + for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++) + dis_deauth_mask[i] = 0xff; + + /* copy the first byte of frame control field */ + dis_deauth_pattern[byte_cnt] = 0xa0; + byte_cnt++; + + /* skip 2nd byte of frame control and Duration field */ + byte_cnt += 3; + + /* + * need not match the destination mac address, it can be a broadcast + * mac address or an unicast to this station + */ + byte_cnt += 6; + + /* copy the source mac address */ + memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN); + + byte_cnt += 6; + + /* copy the bssid, its same as the source mac address */ + + memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN); + + /* Create Disassociate pattern mask */ + + if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_EXACT) { + + if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_DWORD) { + /* + * for AR9280, because of hardware limitation, the + * first 4 bytes have to be matched for all patterns. + * the mask for disassociation and de-auth pattern + * matching need to enable the first 4 bytes. + * also the duration field needs to be filled. + */ + dis_deauth_mask[0] = 0xf0; + + /* + * fill in duration field + FIXME: what is the exact value ? + */ + dis_deauth_pattern[2] = 0xff; + dis_deauth_pattern[3] = 0xff; + } else { + dis_deauth_mask[0] = 0xfe; + } + + dis_deauth_mask[1] = 0x03; + dis_deauth_mask[2] = 0xc0; + } else { + dis_deauth_mask[0] = 0xef; + dis_deauth_mask[1] = 0x3f; + dis_deauth_mask[2] = 0x00; + dis_deauth_mask[3] = 0xfc; + } + + ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n"); + + ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask, + pattern_count, byte_cnt); + + pattern_count++; + /* + * for de-authenticate pattern, only the first byte of the frame + * control field gets changed from 0xA0 to 0xC0 + */ + dis_deauth_pattern[0] = 0xC0; + + ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask, + pattern_count, byte_cnt); + +} + +static void ath9k_wow_add_pattern(struct ath_softc *sc, + struct cfg80211_wowlan *wowlan) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath9k_wow_pattern *wow_pattern = NULL; + struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns; + int mask_len; + s8 i = 0; + + if (!wowlan->n_patterns) + return; + + /* + * Add the new user configured patterns + */ + for (i = 0; i < wowlan->n_patterns; i++) { + + wow_pattern = kzalloc(sizeof(*wow_pattern), GFP_KERNEL); + + if (!wow_pattern) + return; + + /* + * TODO: convert the generic user space pattern to + * appropriate chip specific/802.11 pattern. + */ + + mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8); + memset(wow_pattern->pattern_bytes, 0, MAX_PATTERN_SIZE); + memset(wow_pattern->mask_bytes, 0, MAX_PATTERN_SIZE); + memcpy(wow_pattern->pattern_bytes, patterns[i].pattern, + patterns[i].pattern_len); + memcpy(wow_pattern->mask_bytes, patterns[i].mask, mask_len); + wow_pattern->pattern_len = patterns[i].pattern_len; + + /* + * just need to take care of deauth and disssoc pattern, + * make sure we don't overwrite them. + */ + + ath9k_hw_wow_apply_pattern(ah, wow_pattern->pattern_bytes, + wow_pattern->mask_bytes, + i + 2, + wow_pattern->pattern_len); + kfree(wow_pattern); + + } + +} + +static int ath9k_suspend(struct ieee80211_hw *hw, + struct cfg80211_wowlan *wowlan) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + u32 wow_triggers_enabled = 0; + int ret = 0; + + mutex_lock(&sc->mutex); + + ath_cancel_work(sc); + ath_stop_ani(sc); + del_timer_sync(&sc->rx_poll_timer); + + if (test_bit(SC_OP_INVALID, &sc->sc_flags)) { + ath_dbg(common, ANY, "Device not present\n"); + ret = -EINVAL; + goto fail_wow; + } + + if (WARN_ON(!wowlan)) { + ath_dbg(common, WOW, "None of the WoW triggers enabled\n"); + ret = -EINVAL; + goto fail_wow; + } + + if (!device_can_wakeup(sc->dev)) { + ath_dbg(common, WOW, "device_can_wakeup failed, WoW is not enabled\n"); + ret = 1; + goto fail_wow; + } + + /* + * none of the sta vifs are associated + * and we are not currently handling multivif + * cases, for instance we have to seperately + * configure 'keep alive frame' for each + * STA. + */ + + if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) { + ath_dbg(common, WOW, "None of the STA vifs are associated\n"); + ret = 1; + goto fail_wow; + } + + if (sc->nvifs > 1) { + ath_dbg(common, WOW, "WoW for multivif is not yet supported\n"); + ret = 1; + goto fail_wow; + } + + ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled); + + ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n", + wow_triggers_enabled); + + ath9k_ps_wakeup(sc); + + ath9k_stop_btcoex(sc); + + /* + * Enable wake up on recieving disassoc/deauth + * frame by default. + */ + ath9k_wow_add_disassoc_deauth_pattern(sc); + + if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN) + ath9k_wow_add_pattern(sc, wowlan); + + spin_lock_bh(&sc->sc_pcu_lock); + /* + * To avoid false wake, we enable beacon miss interrupt only + * when we go to sleep. We save the current interrupt mask + * so we can restore it after the system wakes up + */ + sc->wow_intr_before_sleep = ah->imask; + ah->imask &= ~ATH9K_INT_GLOBAL; + ath9k_hw_disable_interrupts(ah); + ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL; + ath9k_hw_set_interrupts(ah); + ath9k_hw_enable_interrupts(ah); + + spin_unlock_bh(&sc->sc_pcu_lock); + + /* + * we can now sync irq and kill any running tasklets, since we already + * disabled interrupts and not holding a spin lock + */ + synchronize_irq(sc->irq); + tasklet_kill(&sc->intr_tq); + + ath9k_hw_wow_enable(ah, wow_triggers_enabled); + + ath9k_ps_restore(sc); + ath_dbg(common, ANY, "WoW enabled in ath9k\n"); + atomic_inc(&sc->wow_sleep_proc_intr); + +fail_wow: + mutex_unlock(&sc->mutex); + return ret; +} + +static int ath9k_resume(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + u32 wow_status; + + mutex_lock(&sc->mutex); + + ath9k_ps_wakeup(sc); + + spin_lock_bh(&sc->sc_pcu_lock); + + ath9k_hw_disable_interrupts(ah); + ah->imask = sc->wow_intr_before_sleep; + ath9k_hw_set_interrupts(ah); + ath9k_hw_enable_interrupts(ah); + + spin_unlock_bh(&sc->sc_pcu_lock); + + wow_status = ath9k_hw_wow_wakeup(ah); + + if (atomic_read(&sc->wow_got_bmiss_intr) == 0) { + /* + * some devices may not pick beacon miss + * as the reason they woke up so we add + * that here for that shortcoming. + */ + wow_status |= AH_WOW_BEACON_MISS; + atomic_dec(&sc->wow_got_bmiss_intr); + ath_dbg(common, ANY, "Beacon miss interrupt picked up during WoW sleep\n"); + } + + atomic_dec(&sc->wow_sleep_proc_intr); + + if (wow_status) { + ath_dbg(common, ANY, "Waking up due to WoW triggers %s with WoW status = %x\n", + ath9k_hw_wow_event_to_string(wow_status), wow_status); + } + + ath_restart_work(sc); + ath9k_start_btcoex(sc); + + ath9k_ps_restore(sc); + mutex_unlock(&sc->mutex); + + return 0; +} + +static void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled) +{ + struct ath_softc *sc = hw->priv; + + mutex_lock(&sc->mutex); + device_init_wakeup(sc->dev, 1); + device_set_wakeup_enable(sc->dev, enabled); + mutex_unlock(&sc->mutex); +} + +#endif +static void ath9k_sw_scan_start(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + + sc->scanning = 1; +} + +static void ath9k_sw_scan_complete(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + + sc->scanning = 0; +} + +struct ieee80211_ops ath9k_ops = { + .tx = ath9k_tx, + .start = ath9k_start, + .stop = ath9k_stop, + .add_interface = ath9k_add_interface, + .change_interface = ath9k_change_interface, + .remove_interface = ath9k_remove_interface, + .config = ath9k_config, + .configure_filter = ath9k_configure_filter, + .sta_add = ath9k_sta_add, + .sta_remove = ath9k_sta_remove, + .sta_notify = ath9k_sta_notify, + .conf_tx = ath9k_conf_tx, + .bss_info_changed = ath9k_bss_info_changed, + .set_key = ath9k_set_key, + .get_tsf = ath9k_get_tsf, + .set_tsf = ath9k_set_tsf, + .reset_tsf = ath9k_reset_tsf, + .ampdu_action = ath9k_ampdu_action, + .get_survey = ath9k_get_survey, + .rfkill_poll = ath9k_rfkill_poll_state, + .set_coverage_class = ath9k_set_coverage_class, + .flush = ath9k_flush, + .tx_frames_pending = ath9k_tx_frames_pending, + .tx_last_beacon = ath9k_tx_last_beacon, + .get_stats = ath9k_get_stats, + .set_antenna = ath9k_set_antenna, + .get_antenna = ath9k_get_antenna, + +#ifdef CONFIG_PM_SLEEP + .suspend = ath9k_suspend, + .resume = ath9k_resume, + .set_wakeup = ath9k_set_wakeup, +#endif + +#ifdef CPTCFG_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 + +#if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS) + .sta_add_debugfs = ath9k_sta_add_debugfs, + .sta_remove_debugfs = ath9k_sta_remove_debugfs, +#endif + .sw_scan_start = ath9k_sw_scan_start, + .sw_scan_complete = ath9k_sw_scan_complete, +}; |