ath9k: Add definitions and structures to support WoW

*add structures, macros and variables for WoW, so that the driver
can make use of it.
*maintain a list for user enabled patterns and masks
*track pattern slots for the hardware limitation on the
maximum number of patterns that can be stored.
*track interrupts enabled before WoW suspend, so
that can be reconfigured after resume
*have macros to parse user defined wow configurations to
hardware code

Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Cc: vadivel@qca.qualcomm.com
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -510,6 +510,12 @@ static inline void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
 }
 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
 
+struct ath9k_wow_pattern {
+	u8 pattern_bytes[MAX_PATTERN_SIZE];
+	u8 mask_bytes[MAX_PATTERN_SIZE];
+	u32 pattern_len;
+};
+
 /********************/
 /*   LED Control    */
 /********************/
@@ -711,6 +717,12 @@ struct ath_softc {
 	struct ath_ant_comb ant_comb;
 	u8 ant_tx, ant_rx;
 	struct dfs_pattern_detector *dfs_detector;
+
+#ifdef CONFIG_PM_SLEEP
+	atomic_t wow_got_bmiss_intr;
+	atomic_t wow_sleep_proc_intr; /* in the middle of WoW sleep ? */
+	u32 wow_intr_before_sleep;
+#endif
 };
 
 void ath9k_tasklet(unsigned long data);

drivers/net/wireless/ath/ath9k/hw.h

@@ -180,6 +180,37 @@
 #define PAPRD_TABLE_SZ			24
 #define PAPRD_IDEAL_AGC2_PWR_RANGE	0xe0
 
+/*
+ * Wake on Wireless
+ */
+
+/* Keep Alive Frame */
+#define KAL_FRAME_LEN		28
+#define KAL_FRAME_TYPE		0x2	/* data frame */
+#define KAL_FRAME_SUB_TYPE	0x4	/* null data frame */
+#define KAL_DURATION_ID		0x3d
+#define KAL_NUM_DATA_WORDS	6
+#define KAL_NUM_DESC_WORDS	12
+#define KAL_ANTENNA_MODE	1
+#define KAL_TO_DS		1
+#define KAL_DELAY		4	/*delay of 4ms between 2 KAL frames */
+#define KAL_TIMEOUT		900
+
+#define MAX_PATTERN_SIZE		256
+#define MAX_PATTERN_MASK_SIZE		32
+#define MAX_NUM_PATTERN			8
+#define MAX_NUM_USER_PATTERN		6 /*  deducting the disassociate and
+					      deauthenticate packets */
+
+/*
+ * WoW trigger mapping to hardware code
+ */
+
+#define AH_WOW_USER_PATTERN_EN		BIT(0)
+#define AH_WOW_MAGIC_PATTERN_EN		BIT(1)
+#define AH_WOW_LINK_CHANGE		BIT(2)
+#define AH_WOW_BEACON_MISS		BIT(3)
+
 enum ath_hw_txq_subtype {
 	ATH_TXQ_AC_BE = 0,
 	ATH_TXQ_AC_BK = 1,
@@ -863,6 +894,9 @@ struct ath_hw {
 	/* Enterprise mode cap */
 	u32 ent_mode;
 
+#ifdef CONFIG_PM_SLEEP
+	u32 wow_event_mask;
+#endif
 	bool is_clk_25mhz;
 	int (*get_mac_revision)(void);
 	int (*external_reset)(void);