void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
{
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
ath9k_ps_wakeup(sc);
cancel_delayed_work_sync(&sc->hw_pll_work);
spin_lock_bh(&sc->sc_pcu_lock);
ieee80211_stop_queues(hw);
/*
* Keep the LED on when the radio is disabled
* during idle unassociated state.
*/
if (!sc->ps_idle) {
ath9k_hw_set_gpio(ah, ah->led_pin, 1);
ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
}
/* Disable interrupts */
ath9k_hw_disable_interrupts(ah);
ath_drain_all_txq(sc, false); /* clear pendin
static int ath9k_tx99_init(struct ath_softc *sc)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_tx_control txctl;
int r;
if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
ath_err(common,
"driver is in invalid state unable to use TX99");
return -EINVAL;
}
sc->tx99_skb = ath9k_build_tx99_skb(sc);
if (!sc->tx99_skb)
return -ENOMEM;
memset(&txctl, 0, sizeof(txctl));
txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
ath_reset(sc, NULL);
ath9k_ps_wakeup(sc);
ath9k_hw_disable_interrupts(ah);
atomic_set(&ah->intr_ref_cnt, -1);
ath_drain_all_txq(sc);
ath_stoprecv(sc);
sc->tx99_state = true;
ieee80211_stop_queues(hw);
if (sc->tx99_power == MAX_RATE_POWER + 1)
sc->tx99_power = MAX_RATE_POWER;
ath9k_hw_tx99_set_txpower(ah, sc->tx99_power);
r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl);
if (r) {
ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n");
return r;
}
ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n",
sc->tx99_power,
sc->tx99_power / 2);
/* We leave the harware awake as it will be chugging on */
return 0;
}
static void ath9k_tx99_stop(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
ath_drain_all_txq(sc);
ath_startrecv(sc);
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
ieee80211_wake_queues(sc->hw);
kfree_skb(sc->tx99_skb);
sc->tx99_skb = NULL;
sc->tx99_state = false;
ath9k_hw_tx99_stop(sc->sc_ah);
ath_dbg(common, XMIT, "TX99 stopped\n");
}
/*
* 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)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_conf *conf = &common->hw->conf;
bool fastcc = true, stopped;
struct ieee80211_channel *channel = hw->conf.channel;
struct ath9k_hw_cal_data *caldata = NULL;
int r;
if (sc->sc_flags & SC_OP_INVALID)
return -EIO;
sc->hw_busy_count = 0;
del_timer_sync(&common->ani.timer);
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);
ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_pcu_lock);
/*
* This is only performed if the channel settings have
* actually changed.
*
* To switch channels clear any pending DMA operations;
* wait long enough for the RX fifo to drain, reset the
* hardware at the new frequency, and then re-enable
* the relevant bits of the h/w.
*/
ath9k_hw_disable_interrupts(ah);
stopped = ath_drain_all_txq(sc, false);
if (!ath_stoprecv(sc))
stopped = false;
if (!ath9k_hw_check_alive(ah))
stopped = false;
/* XXX: do not flush receive queue here. We don't want
* to flush data frames already in queue because of
* changing channel. */
if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
fastcc = false;
if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
caldata = &sc->caldata;
ath_dbg(common, ATH_DBG_CONFIG,
"(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
sc->sc_ah->curchan->channel,
channel->center_freq, conf_is_ht40(conf),
fastcc);
r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
if (r) {
ath_err(common,
"Unable to reset channel (%u MHz), reset status %d\n",
channel->center_freq, r);
goto ps_restore;
}
if (ath_startrecv(sc) != 0) {
ath_err(common, "Unable to restart recv logic\n");
r = -EIO;
goto ps_restore;
}
ath9k_cmn_update_txpow(ah, sc->curtxpow,
sc->config.txpowlimit, &sc->curtxpow);
ath9k_hw_set_interrupts(ah, ah->imask);
if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
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);
if (!common->disable_ani)
ath_start_ani(common);
}
ps_restore:
ieee80211_wake_queues(hw);
spin_unlock_bh(&sc->sc_pcu_lock);
ath9k_ps_restore(sc);
return r;
}
