This patch implements dynamic power save feature for ath9k.
Signed-off-by: Vivek Natarajan <vnatarajan@xxxxxxxxxxx>
---
drivers/net/wireless/ath9k/ath9k.h | 2 +
drivers/net/wireless/ath9k/core.h | 18 ++++++++++++++++
drivers/net/wireless/ath9k/hw.c | 4 +-
drivers/net/wireless/ath9k/hw.h | 1 -
drivers/net/wireless/ath9k/main.c | 39 +++++++++++++++++++++++++++++++++++-
drivers/net/wireless/ath9k/recv.c | 6 +++++
6 files changed, 66 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index d278135..c59e916 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -790,6 +790,8 @@ struct ath_hal {
u16 ah_currentRD5G;
u16 ah_currentRD2G;
char ah_iso[4];
+ enum ath9k_power_mode ah_powerMode;
+ enum ath9k_power_mode ah_restoreMode;
struct ath9k_channel ah_channels[150];
struct ath9k_channel *ah_curchan;
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 4ca2aed..98c7406 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -692,6 +692,7 @@ enum PROT_MODE {
#define SC_OP_RFKILL_REGISTERED BIT(11)
#define SC_OP_RFKILL_SW_BLOCKED BIT(12)
#define SC_OP_RFKILL_HW_BLOCKED BIT(13)
+#define SC_OP_WAIT_FOR_BEACON BIT(14)
struct ath_softc {
struct ieee80211_hw *hw;
@@ -719,6 +720,8 @@ struct ath_softc {
DECLARE_BITMAP(sc_keymap, ATH_KEYMAX);
u8 sc_splitmic;
u8 sc_protrix;
+ atomic_t ps_usecount;
+
enum ath9k_int sc_imask;
enum PROT_MODE sc_protmode;
enum ath9k_ht_extprotspacing sc_ht_extprotspacing;
@@ -751,4 +754,19 @@ int ath_get_hal_qnum(u16 queue, struct ath_softc *sc);
int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc);
int ath_cabq_update(struct ath_softc *);
+static inline void ath9k_ps_wakeup(struct ath_softc *sc)
+{
+ if (atomic_inc_return(&sc->ps_usecount) == 1)
+ if (sc->sc_ah->ah_powerMode != ATH9K_PM_AWAKE) {
+ sc->sc_ah->ah_restoreMode = sc->sc_ah->ah_powerMode;
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
+ }
+}
+
+static inline void ath9k_ps_restore(struct ath_softc *sc)
+{
+ if (atomic_dec_and_test(&sc->ps_usecount))
+ if (sc->hw->conf.flags & IEEE80211_CONF_PS)
+ ath9k_hw_setpower(sc->sc_ah, sc->sc_ah->ah_restoreMode);
+}
#endif /* CORE_H */
diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index d2b0ecf..2da737c 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -2735,7 +2735,7 @@ bool ath9k_hw_setpower(struct ath_hal *ah,
int status = true, setChip = true;
DPRINTF(ah->ah_sc, ATH_DBG_POWER_MGMT, "%s -> %s (%s)\n",
- modes[ahp->ah_powerMode], modes[mode],
+ modes[ah->ah_powerMode], modes[mode],
setChip ? "set chip " : "");
switch (mode) {
@@ -2754,7 +2754,7 @@ bool ath9k_hw_setpower(struct ath_hal *ah,
"Unknown power mode %u\n", mode);
return false;
}
- ahp->ah_powerMode = mode;
+ ah->ah_powerMode = mode;
return status;
}
diff --git a/drivers/net/wireless/ath9k/hw.h b/drivers/net/wireless/ath9k/hw.h
index 91d8f59..17608c5 100644
--- a/drivers/net/wireless/ath9k/hw.h
+++ b/drivers/net/wireless/ath9k/hw.h
@@ -830,7 +830,6 @@ struct ath_hal_5416 {
bool ah_chipFullSleep;
u32 ah_atimWindow;
u16 ah_antennaSwitchSwap;
- enum ath9k_power_mode ah_powerMode;
enum ath9k_ant_setting ah_diversityControl;
/* Calibration */
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 70affb7..ac32f8e 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -262,6 +262,8 @@ static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
if (sc->sc_flags & SC_OP_INVALID)
return -EIO;
+ ath9k_ps_wakeup(sc);
+
if (hchan->channel != sc->sc_ah->ah_curchan->channel ||
hchan->channelFlags != sc->sc_ah->ah_curchan->channelFlags ||
(sc->sc_flags & SC_OP_CHAINMASK_UPDATE) ||
@@ -313,6 +315,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
if (ath_startrecv(sc) != 0) {
DPRINTF(sc, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
+ ath9k_ps_restore(sc);
return -EIO;
}
@@ -320,6 +323,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
ath_update_txpow(sc);
ath9k_hw_set_interrupts(ah, sc->sc_imask);
}
+ ath9k_ps_restore(sc);
return 0;
}
@@ -591,8 +595,10 @@ static irqreturn_t ath_isr(int irq, void *dev)
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;
}
}
}
@@ -1071,6 +1077,7 @@ static void ath_radio_enable(struct ath_softc *sc)
struct ath_hal *ah = sc->sc_ah;
int status;
+ ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_resetlock);
if (!ath9k_hw_reset(ah, ah->ah_curchan,
sc->tx_chan_width,
@@ -1108,6 +1115,7 @@ static void ath_radio_enable(struct ath_softc *sc)
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)
@@ -1115,7 +1123,7 @@ static void ath_radio_disable(struct ath_softc *sc)
struct ath_hal *ah = sc->sc_ah;
int status;
-
+ ath9k_ps_wakeup(sc);
ieee80211_stop_queues(sc->hw);
/* Disable LED */
@@ -1149,6 +1157,7 @@ static void ath_radio_disable(struct ath_softc *sc)
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)
@@ -1298,6 +1307,8 @@ static void ath_detach(struct ath_softc *sc)
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)
@@ -1322,6 +1333,7 @@ static void ath_detach(struct ath_softc *sc)
ath9k_hw_detach(sc->sc_ah);
ath9k_exit_debug(sc);
+ ath9k_ps_restore(sc);
}
static int ath_init(u16 devid, struct ath_softc *sc)
@@ -2135,6 +2147,27 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
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 |
IEEE80211_CONF_CHANGE_HT)) {
struct ieee80211_channel *curchan = hw->conf.channel;
@@ -2359,6 +2392,7 @@ static int ath9k_set_key(struct ieee80211_hw *hw,
struct ath_softc *sc = hw->priv;
int ret = 0;
+ ath9k_ps_wakeup(sc);
DPRINTF(sc, ATH_DBG_KEYCACHE, "Set HW Key\n");
switch (cmd) {
@@ -2380,6 +2414,7 @@ static int ath9k_set_key(struct ieee80211_hw *hw,
ret = -EINVAL;
}
+ ath9k_ps_restore(sc);
return ret;
}
@@ -2443,6 +2478,7 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw,
struct ath_softc *sc = hw->priv;
int ret = 0;
+ ath9k_ps_wakeup(sc);
switch (action) {
case IEEE80211_AMPDU_RX_START:
if (!(sc->sc_flags & SC_OP_RXAGGR))
@@ -2472,6 +2508,7 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw,
default:
DPRINTF(sc, ATH_DBG_FATAL, "Unknown AMPDU action\n");
}
+ ath9k_ps_restore(sc);
return ret;
}
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index 462e08c..35d9209 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -622,6 +622,12 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
} else {
sc->rx.rxotherant = 0;
}
+
+ if (ieee80211_is_beacon(hdr->frame_control) &&
+ (sc->sc_flags & SC_OP_WAIT_FOR_BEACON)) {
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON;
+ ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
+ }
requeue:
list_move_tail(&bf->list, &sc->rx.rxbuf);
ath_rx_buf_link(sc, bf);
--
1.6.0.1
--
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