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 3817645..0b305b8 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -793,6 +793,8 @@ struct ath_hal {
u16 ah_currentRD5G;
u16 ah_currentRD2G;
char ah_iso[4];
+ enum ath9k_power_mode ah_power_mode;
+ enum ath9k_power_mode ah_restore_mode;
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 f65933d..0f50767 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -676,6 +676,7 @@ 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_bus_ops {
void (*read_cachesize)(struct ath_softc *sc, int *csz);
@@ -709,6 +710,7 @@ struct ath_softc {
u32 sc_keymax;
DECLARE_BITMAP(sc_keymap, ATH_KEYMAX);
u8 sc_splitmic;
+ atomic_t ps_usecount;
enum ath9k_int sc_imask;
enum PROT_MODE sc_protmode;
enum ath9k_ht_extprotspacing sc_ht_extprotspacing;
@@ -777,4 +779,20 @@ static inline int ath_ahb_init(void) { return 0; };
static inline void ath_ahb_exit(void) {};
#endif
+static inline void ath9k_ps_wakeup(struct ath_softc *sc)
+{
+ if (atomic_inc_return(&sc->ps_usecount) == 1)
+ if (sc->sc_ah->ah_power_mode != ATH9K_PM_AWAKE) {
+ sc->sc_ah->ah_restore_mode = sc->sc_ah->ah_power_mode;
+ 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_restore_mode);
+}
#endif /* CORE_H */
diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 88c8a62..ab15e55 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -2698,7 +2698,7 @@ 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_power_mode], modes[mode],
setChip ? "set chip " : "");
switch (mode) {
@@ -2717,7 +2717,7 @@ bool ath9k_hw_setpower(struct ath_hal *ah,
"Unknown power mode %u\n", mode);
return false;
}
- ahp->ah_powerMode = mode;
+ ah->ah_power_mode = mode;
return status;
}
diff --git a/drivers/net/wireless/ath9k/hw.h b/drivers/net/wireless/ath9k/hw.h
index d44e016..087c571 100644
--- a/drivers/net/wireless/ath9k/hw.h
+++ b/drivers/net/wireless/ath9k/hw.h
@@ -844,7 +844,6 @@ 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 8ad927a..b494a0d 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -237,6 +237,8 @@ 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);
+
/*
* This is only performed if the channel settings have
* actually changed.
@@ -287,6 +289,7 @@ static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
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 @@ 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;
}
}
}
@@ -1044,6 +1049,7 @@ static void ath_radio_enable(struct ath_softc *sc)
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 @@ 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)
@@ -1083,6 +1090,7 @@ static void ath_radio_disable(struct ath_softc *sc)
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 @@ 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)
@@ -1259,6 +1268,8 @@ 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)
@@ -1283,6 +1294,7 @@ 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)
@@ -1526,7 +1538,9 @@ int ath_attach(u16 devid, struct ath_softc *sc)
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 @@ 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) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos;
@@ -2310,6 +2345,7 @@ 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) {
@@ -2333,6 +2369,7 @@ static int ath9k_set_key(struct ieee80211_hw *hw,
ret = -EINVAL;
}
+ ath9k_ps_restore(sc);
return ret;
}
diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index 648bb49..8da08f9 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -628,6 +628,12 @@ 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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