As all bt packets are priority traffic during bt scan, wifi
will get disconnected when bt scan lasts for few seconds. Fix
this by allocating 10% of bt period time (4.5ms) to wifi fully.
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ath9k.h | 2 ++
drivers/net/wireless/ath/ath9k/btcoex.h | 2 ++
drivers/net/wireless/ath/ath9k/gpio.c | 30 ++++++++++++++++++++++--------
drivers/net/wireless/ath/ath9k/reg.h | 6 +++---
4 files changed, 29 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index bf3d4c4..bdbcc70 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -364,6 +364,7 @@ struct ath_btcoex {
int bt_stomp_type; /* Types of BT stomping */
u32 btcoex_no_stomp; /* in usec */
u32 btcoex_period; /* in usec */
+ u32 btscan_no_stomp; /* in usec */
struct ath_gen_timer *no_stomp_timer; /* Timer for no BT stomping */
};
@@ -429,6 +430,7 @@ void ath_deinit_leds(struct ath_softc *sc);
#define SC_OP_SCANNING BIT(10)
#define SC_OP_TSF_RESET BIT(11)
#define SC_OP_BT_PRIORITY_DETECTED BIT(12)
+#define SC_OP_BT_SCAN BIT(13)
/* Powersave flags */
#define PS_WAIT_FOR_BEACON BIT(0)
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index 1ba31a7..1ee5a15 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -25,10 +25,12 @@
#define ATH_BTCOEX_DEF_BT_PERIOD 45
#define ATH_BTCOEX_DEF_DUTY_CYCLE 55
+#define ATH_BTCOEX_BTSCAN_DUTY_CYCLE 90
#define ATH_BTCOEX_BMISS_THRESH 50
#define ATH_BT_PRIORITY_TIME_THRESHOLD 1000 /* ms */
#define ATH_BT_CNT_THRESHOLD 3
+#define ATH_BT_CNT_SCAN_THRESHOLD 15
enum ath_btcoex_scheme {
ATH_BTCOEX_CFG_NONE,
diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c
index e204bd2..deab8be 100644
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -230,12 +230,17 @@ static void ath_detect_bt_priority(struct ath_softc *sc)
if (time_after(jiffies, btcoex->bt_priority_time +
msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
- if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
+ sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
+ /* Detect if colocated bt started scanning */
+ if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
+ ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
+ "BT scan detected");
+ sc->sc_flags |= (SC_OP_BT_SCAN |
+ SC_OP_BT_PRIORITY_DETECTED);
+ } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
"BT priority traffic detected");
sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
- } else {
- sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
}
btcoex->bt_priority_cnt = 0;
@@ -316,12 +321,17 @@ static void ath_btcoex_period_timer(unsigned long data)
struct ath_softc *sc = (struct ath_softc *) data;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
+ u32 timer_period;
+ bool is_btscan;
ath_detect_bt_priority(sc);
+ is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
+
spin_lock_bh(&btcoex->btcoex_lock);
- ath9k_btcoex_bt_stomp(sc, btcoex->bt_stomp_type);
+ ath9k_btcoex_bt_stomp(sc, is_btscan ? ATH_BTCOEX_STOMP_ALL :
+ btcoex->bt_stomp_type);
spin_unlock_bh(&btcoex->btcoex_lock);
@@ -329,11 +339,12 @@ static void ath_btcoex_period_timer(unsigned long data)
if (btcoex->hw_timer_enabled)
ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
+ timer_period = is_btscan ? btcoex->btscan_no_stomp :
+ btcoex->btcoex_no_stomp;
ath9k_gen_timer_start(ah,
btcoex->no_stomp_timer,
(ath9k_hw_gettsf32(ah) +
- btcoex->btcoex_no_stomp),
- btcoex->btcoex_no_stomp * 10);
+ timer_period), timer_period * 10);
btcoex->hw_timer_enabled = true;
}
@@ -350,13 +361,14 @@ static void ath_btcoex_no_stomp_timer(void *arg)
struct ath_softc *sc = (struct ath_softc *)arg;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
+ bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
"no stomp timer running \n");
spin_lock_bh(&btcoex->btcoex_lock);
- if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW)
+ if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_NONE);
else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_LOW);
@@ -371,6 +383,8 @@ int ath_init_btcoex_timer(struct ath_softc *sc)
btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
btcoex->btcoex_period / 100;
+ btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
+ btcoex->btcoex_period / 100;
setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
(unsigned long) sc);
@@ -405,7 +419,7 @@ void ath9k_btcoex_timer_resume(struct ath_softc *sc)
btcoex->bt_priority_cnt = 0;
btcoex->bt_priority_time = jiffies;
- sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
+ sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
mod_timer(&btcoex->period_timer, jiffies);
}
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 8e653fb..72cfa8e 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -1547,9 +1547,9 @@ enum {
#define AR_BT_COEX_WEIGHT 0x8174
#define AR_BT_COEX_WGHT 0xff55
-#define AR_STOMP_ALL_WLAN_WGHT 0xffcc
-#define AR_STOMP_LOW_WLAN_WGHT 0xaaa8
-#define AR_STOMP_NONE_WLAN_WGHT 0xaa00
+#define AR_STOMP_ALL_WLAN_WGHT 0xfcfc
+#define AR_STOMP_LOW_WLAN_WGHT 0xa8a8
+#define AR_STOMP_NONE_WLAN_WGHT 0x0000
#define AR_BTCOEX_BT_WGHT 0x0000ffff
#define AR_BTCOEX_BT_WGHT_S 0
#define AR_BTCOEX_WL_WGHT 0xffff0000
--
1.6.3.3
--
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