ath9k: Add Bluetooth Coexistence 3-wire support

This patch adds 3-wire bluetooth coex support for AR9285.
This support can be enabled through btcoex_enable modparam.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 60 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index cdfa80d0eb4d..45568196c59a 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -20,20 +20,79 @@
 #define ATH_WLANACTIVE_GPIO	5
 #define ATH_BTACTIVE_GPIO	6
 
+#define ATH_BTCOEX_DEF_BT_PERIOD  45
+#define ATH_BTCOEX_DEF_DUTY_CYCLE 55
+#define ATH_BTCOEX_BMISS_THRESH   50
+
+#define ATH_BT_PRIORITY_TIME_THRESHOLD 1000 /* ms */
+#define ATH_BT_CNT_THRESHOLD	       3
+
 enum ath_btcoex_scheme {
 	ATH_BTCOEX_CFG_NONE,
 	ATH_BTCOEX_CFG_2WIRE,
 	ATH_BTCOEX_CFG_3WIRE,
 };
 
+enum ath_stomp_type {
+	ATH_BTCOEX_NO_STOMP,
+	ATH_BTCOEX_STOMP_ALL,
+	ATH_BTCOEX_STOMP_LOW,
+	ATH_BTCOEX_STOMP_NONE
+};
+
+enum ath_bt_mode {
+	ATH_BT_COEX_MODE_LEGACY,	/* legacy rx_clear mode */
+	ATH_BT_COEX_MODE_UNSLOTTED,	/* untimed/unslotted mode */
+	ATH_BT_COEX_MODE_SLOTTED,	/* slotted mode */
+	ATH_BT_COEX_MODE_DISALBED,	/* coexistence disabled */
+};
+
+struct ath_btcoex_config {
+	u8 bt_time_extend;
+	bool bt_txstate_extend;
+	bool bt_txframe_extend;
+	enum ath_bt_mode bt_mode; /* coexistence mode */
+	bool bt_quiet_collision;
+	bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
+	u8 bt_priority_time;
+	u8 bt_first_slot_time;
+	bool bt_hold_rx_clear;
+};
+
 struct ath_btcoex_info {
 	enum ath_btcoex_scheme btcoex_scheme;
 	u8 wlanactive_gpio;
 	u8 btactive_gpio;
+	u8 btpriority_gpio;
+	u8 bt_duty_cycle; 	/* BT duty cycle in percentage */
+	int bt_stomp_type; 	/* Types of BT stomping */
+	u32 bt_coex_mode; 	/* Register setting for AR_BT_COEX_MODE */
+	u32 bt_coex_weights; 	/* Register setting for AR_BT_COEX_WEIGHT */
+	u32 bt_coex_mode2; 	/* Register setting for AR_BT_COEX_MODE2 */
+	u32 btcoex_no_stomp;   /* in usec */
+	u32 btcoex_period;     	/* in usec */
+	u32 bt_priority_cnt;
+	unsigned long bt_priority_time;
+	bool hw_timer_enabled;
+	spinlock_t btcoex_lock;
+	struct timer_list period_timer;      /* Timer for BT period */
+	struct ath_gen_timer *no_stomp_timer; /*Timer for no BT stomping*/
 };
 
-void ath9k_hw_btcoex_init(struct ath_hw *ah);
+int ath9k_hw_btcoex_init(struct ath_hw *ah);
 void ath9k_hw_btcoex_enable(struct ath_hw *ah);
 void ath9k_hw_btcoex_disable(struct ath_hw *ah);
+void ath_btcoex_timer_resume(struct ath_softc *sc,
+			     struct ath_btcoex_info *btinfo);
+void ath_btcoex_timer_pause(struct ath_softc *sc,
+			    struct ath_btcoex_info *btinfo);
+
+static inline void ath_btcoex_set_weight(struct ath_btcoex_info *btcoex_info,
+					 u32 bt_weight,
+					 u32 wlan_weight)
+{
+	btcoex_info->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
+				       SM(wlan_weight, AR_BTCOEX_WL_WGHT);
+}
 
 #endif