ath9k: Enable dynamic power save in ath9k.
This patch implements dynamic power save feature for ath9k.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 8ad927a..b494a0d 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -237,6 +237,8 @@
if (sc->sc_flags & SC_OP_INVALID)
return -EIO;
+ ath9k_ps_wakeup(sc);
+
/*
* This is only performed if the channel settings have
* actually changed.
@@ -287,6 +289,7 @@
ath_cache_conf_rate(sc, &hw->conf);
ath_update_txpow(sc);
ath9k_hw_set_interrupts(ah, sc->sc_imask);
+ ath9k_ps_restore(sc);
return 0;
}
@@ -559,8 +562,10 @@
ATH9K_HW_CAP_AUTOSLEEP)) {
/* Clear RxAbort bit so that we can
* receive frames */
+ ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
ath9k_hw_setrxabort(ah, 0);
sched = true;
+ sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
}
}
}
@@ -1044,6 +1049,7 @@
struct ieee80211_channel *channel = sc->hw->conf.channel;
int r;
+ ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->ah_curchan, false);
@@ -1075,6 +1081,7 @@
ath9k_hw_set_gpio(ah, ATH_LED_PIN, 0);
ieee80211_wake_queues(sc->hw);
+ ath9k_ps_restore(sc);
}
static void ath_radio_disable(struct ath_softc *sc)
@@ -1083,6 +1090,7 @@
struct ieee80211_channel *channel = sc->hw->conf.channel;
int r;
+ ath9k_ps_wakeup(sc);
ieee80211_stop_queues(sc->hw);
/* Disable LED */
@@ -1108,6 +1116,7 @@
ath9k_hw_phy_disable(ah);
ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
+ ath9k_ps_restore(sc);
}
static bool ath_is_rfkill_set(struct ath_softc *sc)
@@ -1259,6 +1268,8 @@
struct ieee80211_hw *hw = sc->hw;
int i = 0;
+ ath9k_ps_wakeup(sc);
+
DPRINTF(sc, ATH_DBG_CONFIG, "Detach ATH hw\n");
#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
@@ -1283,6 +1294,7 @@
ath9k_hw_detach(sc->sc_ah);
ath9k_exit_debug(sc);
+ ath9k_ps_restore(sc);
}
static int ath_init(u16 devid, struct ath_softc *sc)
@@ -1526,7 +1538,9 @@
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
IEEE80211_HW_SIGNAL_DBM |
- IEEE80211_HW_AMPDU_AGGREGATION;
+ IEEE80211_HW_AMPDU_AGGREGATION |
+ IEEE80211_HW_SUPPORTS_PS |
+ IEEE80211_HW_PS_NULLFUNC_STACK;
if (AR_SREV_9160_10_OR_LATER(sc->sc_ah))
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
@@ -2090,6 +2104,27 @@
struct ieee80211_conf *conf = &hw->conf;
mutex_lock(&sc->mutex);
+ if (changed & IEEE80211_CONF_CHANGE_PS) {
+ if (conf->flags & IEEE80211_CONF_PS) {
+ if ((sc->sc_imask & ATH9K_INT_TIM_TIMER) == 0) {
+ sc->sc_imask |= ATH9K_INT_TIM_TIMER;
+ ath9k_hw_set_interrupts(sc->sc_ah,
+ sc->sc_imask);
+ }
+ ath9k_hw_setrxabort(sc->sc_ah, 1);
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
+ } else {
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
+ ath9k_hw_setrxabort(sc->sc_ah, 0);
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON;
+ if (sc->sc_imask & ATH9K_INT_TIM_TIMER) {
+ sc->sc_imask &= ~ATH9K_INT_TIM_TIMER;
+ ath9k_hw_set_interrupts(sc->sc_ah,
+ sc->sc_imask);
+ }
+ }
+ }
+
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos;
@@ -2310,6 +2345,7 @@
struct ath_softc *sc = hw->priv;
int ret = 0;
+ ath9k_ps_wakeup(sc);
DPRINTF(sc, ATH_DBG_KEYCACHE, "Set HW Key\n");
switch (cmd) {
@@ -2333,6 +2369,7 @@
ret = -EINVAL;
}
+ ath9k_ps_restore(sc);
return ret;
}