This patch lays the groundwork for handling TSF Out of Range
interrupt, which will be used for power save later on.
Signed-off-by: Sujith <Sujith.Manoharan@xxxxxxxxxxx>
---
drivers/net/wireless/ath9k/beacon.c | 3 +++
drivers/net/wireless/ath9k/hw.c | 8 +++++++-
drivers/net/wireless/ath9k/hw.h | 4 ++++
drivers/net/wireless/ath9k/main.c | 15 +++++++++++----
drivers/net/wireless/ath9k/reg.h | 4 ++--
5 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c
index 2e2ef35..390d510 100644
--- a/drivers/net/wireless/ath9k/beacon.c
+++ b/drivers/net/wireless/ath9k/beacon.c
@@ -753,6 +753,9 @@ void ath_beacon_config(struct ath_softc *sc, int if_id)
if (bs.bs_sleepduration > bs.bs_dtimperiod)
bs.bs_sleepduration = bs.bs_dtimperiod;
+ /* TSF out of range threshold fixed at 1 second */
+ bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
+
DPRINTF(sc, ATH_DBG_BEACON,
"tsf %llu "
"tsf:tu %u "
diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 6939e41..4af1aac 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -2803,6 +2803,8 @@ bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked)
mask2 |= ATH9K_INT_GTT;
if (isr2 & AR_ISR_S2_CST)
mask2 |= ATH9K_INT_CST;
+ if (isr2 & AR_ISR_S2_TSFOOR)
+ mask2 |= ATH9K_INT_TSFOOR;
}
isr = REG_READ(ah, AR_ISR_RAC);
@@ -2948,7 +2950,9 @@ enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
if (ints & ATH9K_INT_DTIMSYNC)
mask2 |= AR_IMR_S2_DTIMSYNC;
if (ints & ATH9K_INT_CABEND)
- mask2 |= (AR_IMR_S2_CABEND);
+ mask2 |= AR_IMR_S2_CABEND;
+ if (ints & ATH9K_INT_TSFOOR)
+ mask2 |= AR_IMR_S2_TSFOOR;
}
if (ints & (ATH9K_INT_GTT | ATH9K_INT_CST)) {
@@ -3118,6 +3122,8 @@ void ath9k_hw_set_sta_beacon_timers(struct ath_hw *ah,
AR_TBTT_TIMER_EN | AR_TIM_TIMER_EN |
AR_DTIM_TIMER_EN);
+ /* TSF Out of Range Threshold */
+ REG_WRITE(ah, AR_TSFOOR_THRESHOLD, bs->bs_tsfoor_threshold);
}
/*******************/
diff --git a/drivers/net/wireless/ath9k/hw.h b/drivers/net/wireless/ath9k/hw.h
index 8211163..587a78d 100644
--- a/drivers/net/wireless/ath9k/hw.h
+++ b/drivers/net/wireless/ath9k/hw.h
@@ -249,6 +249,7 @@ enum ath9k_int {
ATH9K_INT_DTIMSYNC = 0x00800000,
ATH9K_INT_GPIO = 0x01000000,
ATH9K_INT_CABEND = 0x02000000,
+ ATH9K_INT_TSFOOR = 0x04000000,
ATH9K_INT_CST = 0x10000000,
ATH9K_INT_GTT = 0x20000000,
ATH9K_INT_FATAL = 0x40000000,
@@ -256,6 +257,7 @@ enum ath9k_int {
ATH9K_INT_BMISC = ATH9K_INT_TIM |
ATH9K_INT_DTIM |
ATH9K_INT_DTIMSYNC |
+ ATH9K_INT_TSFOOR |
ATH9K_INT_CABEND,
ATH9K_INT_COMMON = ATH9K_INT_RXNOFRM |
ATH9K_INT_RXDESC |
@@ -385,6 +387,7 @@ struct ath9k_beacon_state {
#define ATH9K_BEACON_PERIOD 0x0000ffff
#define ATH9K_BEACON_ENA 0x00800000
#define ATH9K_BEACON_RESET_TSF 0x01000000
+#define ATH9K_TSFOOR_THRESHOLD 0x00004240 /* 16k us */
u32 bs_dtimperiod;
u16 bs_cfpperiod;
u16 bs_cfpmaxduration;
@@ -392,6 +395,7 @@ struct ath9k_beacon_state {
u16 bs_timoffset;
u16 bs_bmissthreshold;
u32 bs_sleepduration;
+ u32 bs_tsfoor_threshold;
};
struct chan_centers {
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index fc3460f..ab4f78d 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -574,6 +574,10 @@ irqreturn_t ath_isr(int irq, void *dev)
sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
}
}
+ if (status & ATH9K_INT_TSFOOR) {
+ /* FIXME: Handle this interrupt for power save */
+ sched = true;
+ }
}
} while (0);
@@ -2155,10 +2159,13 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
* Enable MIB interrupts when there are hardware phy counters.
* Note we only do this (at the moment) for station mode.
*/
- if (ath9k_hw_phycounters(sc->sc_ah) &&
- ((conf->type == NL80211_IFTYPE_STATION) ||
- (conf->type == NL80211_IFTYPE_ADHOC)))
- sc->imask |= ATH9K_INT_MIB;
+ if ((conf->type == NL80211_IFTYPE_STATION) ||
+ (conf->type == NL80211_IFTYPE_ADHOC)) {
+ if (ath9k_hw_phycounters(sc->sc_ah))
+ sc->imask |= ATH9K_INT_MIB;
+ sc->imask |= ATH9K_INT_TSFOOR;
+ }
+
/*
* Some hardware processes the TIM IE and fires an
* interrupt when the TIM bit is set. For hardware
diff --git a/drivers/net/wireless/ath9k/reg.h b/drivers/net/wireless/ath9k/reg.h
index 17ed190..a471832 100644
--- a/drivers/net/wireless/ath9k/reg.h
+++ b/drivers/net/wireless/ath9k/reg.h
@@ -1385,8 +1385,8 @@ enum {
#define AR_PHY_COUNTMAX (3 << 22)
#define AR_MIBCNT_INTRMASK (3 << 22)
-#define AR_TSF_THRESHOLD 0x813c
-#define AR_TSF_THRESHOLD_VAL 0x0000FFFF
+#define AR_TSFOOR_THRESHOLD 0x813c
+#define AR_TSFOOR_THRESHOLD_VAL 0x0000FFFF
#define AR_PHY_ERR_EIFS_MASK 8144
--
1.6.1
--
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