ath9k: add some fixes for radio reinit and frame flush

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28772 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 320 insertions, 0 deletions

diff --git a/package/mac80211/patches/560-ath9k_fix_radio_stop.patch b/package/mac80211/patches/560-ath9k_fix_radio_stop.patch
new file mode 100644
index 000000000..029f1e490
--- /dev/null
+++ b/package/mac80211/patches/560-ath9k_fix_radio_stop.patch
@@ -0,0 +1,275 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -124,14 +124,14 @@ void ath9k_ps_restore(struct ath_softc *
+ 		 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
+ 			      PS_WAIT_FOR_CAB |
+ 			      PS_WAIT_FOR_PSPOLL_DATA |
+-			      PS_WAIT_FOR_TX_ACK)))
++			      PS_WAIT_FOR_TX_ACK))) {
+ 		mode = ATH9K_PM_NETWORK_SLEEP;
+-	else
+-		goto unlock;
+ 
+-	spin_lock(&common->cc_lock);
+-	ath_hw_cycle_counters_update(common);
+-	spin_unlock(&common->cc_lock);
++		spin_lock(&common->cc_lock);
++		ath_hw_cycle_counters_update(common);
++		spin_unlock(&common->cc_lock);
++	} else
++		goto unlock;
+ 
+ 	ath9k_hw_setpower(sc->sc_ah, mode);
+ 
+@@ -880,82 +880,6 @@ chip_reset:
+ #undef SCHED_INTR
+ }
+ 
+-static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
+-{
+-	struct ath_hw *ah = sc->sc_ah;
+-	struct ath_common *common = ath9k_hw_common(ah);
+-	struct ieee80211_channel *channel = hw->conf.channel;
+-	int r;
+-
+-	ath9k_ps_wakeup(sc);
+-	spin_lock_bh(&sc->sc_pcu_lock);
+-	atomic_set(&ah->intr_ref_cnt, -1);
+-
+-	ath9k_hw_configpcipowersave(ah, false);
+-
+-	if (!ah->curchan)
+-		ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
+-
+-	r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
+-	if (r) {
+-		ath_err(common,
+-			"Unable to reset channel (%u MHz), reset status %d\n",
+-			channel->center_freq, r);
+-	}
+-
+-	ath_complete_reset(sc, true);
+-
+-	/* Enable LED */
+-	ath9k_hw_cfg_output(ah, ah->led_pin,
+-			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+-	ath9k_hw_set_gpio(ah, ah->led_pin, 0);
+-
+-	spin_unlock_bh(&sc->sc_pcu_lock);
+-
+-	ath9k_ps_restore(sc);
+-}
+-
+-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);
+-
+-	ath_cancel_work(sc);
+-
+-	spin_lock_bh(&sc->sc_pcu_lock);
+-
+-	/*
+-	 * 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);
+-	}
+-
+-	ath_prepare_reset(sc, false, true);
+-
+-	if (!ah->curchan)
+-		ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
+-
+-	r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
+-	if (r) {
+-		ath_err(ath9k_hw_common(sc->sc_ah),
+-			"Unable to reset channel (%u MHz), reset status %d\n",
+-			channel->center_freq, r);
+-	}
+-
+-	ath9k_hw_phy_disable(ah);
+-
+-	ath9k_hw_configpcipowersave(ah, true);
+-
+-	spin_unlock_bh(&sc->sc_pcu_lock);
+-	ath9k_ps_restore(sc);
+-}
+-
+ static int ath_reset(struct ath_softc *sc, bool retry_tx)
+ {
+ 	int r;
+@@ -1091,6 +1015,9 @@ static int ath9k_start(struct ieee80211_
+ 	 * 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,
+@@ -1129,6 +1056,16 @@ static int ath9k_start(struct ieee80211_
+ 		goto mutex_unlock;
+ 	}
+ 
++	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);
+ 
+ 	if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
+@@ -1260,9 +1197,6 @@ static void ath9k_stop(struct ieee80211_
+ 		sc->rx.frag = NULL;
+ 	}
+ 
+-	/* disable HAL and put h/w to sleep */
+-	ath9k_hw_disable(ah);
+-
+ 	spin_unlock_bh(&sc->sc_pcu_lock);
+ 
+ 	/* we can now sync irq and kill any running tasklets, since we already
+@@ -1271,10 +1205,27 @@ static void ath9k_stop(struct ieee80211_
+ 	tasklet_kill(&sc->intr_tq);
+ 	tasklet_kill(&sc->bcon_tasklet);
+ 
+-	ath9k_ps_restore(sc);
+-
+ 	sc->ps_idle = true;
+-	ath_radio_disable(sc, hw);
++
++	spin_lock_bh(&sc->sc_pcu_lock);
++
++	ath9k_hw_set_gpio(ah, ah->led_pin, 1);
++	ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
++
++	ath_prepare_reset(sc, false, true);
++
++	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_disable(ah);
++
++	ath9k_hw_configpcipowersave(ah, true);
++
++	spin_unlock_bh(&sc->sc_pcu_lock);
++
++	ath9k_ps_restore(sc);
+ 
+ 	sc->sc_flags |= SC_OP_INVALID;
+ 
+@@ -1598,8 +1549,8 @@ static int ath9k_config(struct ieee80211
+ 	struct ath_hw *ah = sc->sc_ah;
+ 	struct ath_common *common = ath9k_hw_common(ah);
+ 	struct ieee80211_conf *conf = &hw->conf;
+-	bool disable_radio = false;
+ 
++	ath9k_ps_wakeup(sc);
+ 	mutex_lock(&sc->mutex);
+ 
+ 	/*
+@@ -1608,16 +1559,8 @@ static int ath9k_config(struct ieee80211
+ 	 * of the changes. Likewise we must only disable the radio towards
+ 	 * the end.
+ 	 */
+-	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
++	if (changed & IEEE80211_CONF_CHANGE_IDLE)
+ 		sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
+-		if (!sc->ps_idle) {
+-			ath_radio_enable(sc, hw);
+-			ath_dbg(common, ATH_DBG_CONFIG,
+-				"not-idle: enabling radio\n");
+-		} else {
+-			disable_radio = true;
+-		}
+-	}
+ 
+ 	/*
+ 	 * We just prepare to enable PS. We have to wait until our AP has
+@@ -1742,19 +1685,13 @@ static int ath9k_config(struct ieee80211
+ 		ath_dbg(common, ATH_DBG_CONFIG,
+ 			"Set power: %d\n", conf->power_level);
+ 		sc->config.txpowlimit = 2 * conf->power_level;
+-		ath9k_ps_wakeup(sc);
+ 		ath9k_cmn_update_txpow(ah, sc->curtxpow,
+ 				       sc->config.txpowlimit, &sc->curtxpow);
+-		ath9k_ps_restore(sc);
+ 		conf->cur_power_level = sc->curtxpow / 2;
+ 	}
+ 
+-	if (disable_radio) {
+-		ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
+-		ath_radio_disable(sc, hw);
+-	}
+-
+ 	mutex_unlock(&sc->mutex);
++	ath9k_ps_restore(sc);
+ 
+ 	return 0;
+ }
+--- a/drivers/net/wireless/ath/ath9k/pci.c
++++ b/drivers/net/wireless/ath/ath9k/pci.c
+@@ -302,26 +302,12 @@ static void ath_pci_remove(struct pci_de
+ 
+ static int ath_pci_suspend(struct device *device)
+ {
+-	struct pci_dev *pdev = to_pci_dev(device);
+-	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+-	struct ath_softc *sc = hw->priv;
+-
+-	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
+-
+-	/* The device has to be moved to FULLSLEEP forcibly.
+-	 * Otherwise the chip never moved to full sleep,
+-	 * when no interface is up.
+-	 */
+-	ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
+-
+ 	return 0;
+ }
+ 
+ static int ath_pci_resume(struct device *device)
+ {
+ 	struct pci_dev *pdev = to_pci_dev(device);
+-	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+-	struct ath_softc *sc = hw->priv;
+ 	u32 val;
+ 
+ 	/*
+@@ -333,22 +319,6 @@ static int ath_pci_resume(struct device 
+ 	if ((val & 0x0000ff00) != 0)
+ 		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
+ 
+-	ath9k_ps_wakeup(sc);
+-	/* Enable LED */
+-	ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
+-			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+-	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_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);
+-	ath9k_ps_restore(sc);
+-
+-	sc->ps_idle = true;
+-	ath_radio_disable(sc, hw);
+-
+ 	return 0;
+ }
+ 
diff --git a/package/mac80211/patches/561-ath9k_fix_flush.patch b/package/mac80211/patches/561-ath9k_fix_flush.patch
new file mode 100644
index 000000000..58b71201a
--- /dev/null
+++ b/package/mac80211/patches/561-ath9k_fix_flush.patch
@@ -0,0 +1,45 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -2259,9 +2259,6 @@ static void ath9k_flush(struct ieee80211
+ 		return;
+ 	}
+ 
+-	if (drop)
+-		timeout = 1;
+-
+ 	for (j = 0; j < timeout; j++) {
+ 		bool npend = false;
+ 
+@@ -2279,21 +2276,22 @@ static void ath9k_flush(struct ieee80211
+ 		}
+ 
+ 		if (!npend)
+-		    goto out;
++		    break;
+ 	}
+ 
+-	ath9k_ps_wakeup(sc);
+-	spin_lock_bh(&sc->sc_pcu_lock);
+-	drain_txq = ath_drain_all_txq(sc, false);
+-	spin_unlock_bh(&sc->sc_pcu_lock);
++	if (drop) {
++		ath9k_ps_wakeup(sc);
++		spin_lock_bh(&sc->sc_pcu_lock);
++		drain_txq = ath_drain_all_txq(sc, false);
++		spin_unlock_bh(&sc->sc_pcu_lock);
+ 
+-	if (!drain_txq)
+-		ath_reset(sc, false);
++		if (!drain_txq)
++			ath_reset(sc, false);
+ 
+-	ath9k_ps_restore(sc);
+-	ieee80211_wake_queues(hw);
++		ath9k_ps_restore(sc);
++		ieee80211_wake_queues(hw);
++	}
+ 
+-out:
+ 	ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
+ 	mutex_unlock(&sc->mutex);
+ }