ath9k: Add three stream rate control support for AR938X.

This patch adds 3 stream rate control support for AR938X family
chipsets which supports 3 streams.
Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -24,7 +24,7 @@
 struct ath_softc;
 
 #define ATH_RATE_MAX     30
-#define RATE_TABLE_SIZE  64
+#define RATE_TABLE_SIZE  72
 #define MAX_TX_RATE_PHY  48
 
 
@@ -36,19 +36,34 @@ struct ath_softc;
 #define RC_HT_20	0x0010
 #define RC_HT_40	0x0020
 
-#define RC_SS_OR_LEGACY(f)     ((f) & (RC_SS | RC_LEGACY))
+#define RC_STREAM_MASK	0xe
+#define RC_DS_OR_LATER(f)	((((f) & RC_STREAM_MASK) == RC_DS) || \
+				(((f) & RC_STREAM_MASK) == (RC_DS | RC_TS)))
+#define RC_TS_ONLY(f)		(((f) & RC_STREAM_MASK) == RC_TS)
+#define RC_SS_OR_LEGACY(f)	((f) & (RC_SS | RC_LEGACY))
 
 #define RC_HT_2040		(RC_HT_20 | RC_HT_40)
-#define RC_ALL_STREAM		(RC_SS | RC_DS)
+#define RC_ALL_STREAM		(RC_SS | RC_DS | RC_TS)
 #define RC_L_SD			(RC_LEGACY | RC_SS | RC_DS)
-#define RC_HT_SD_2040		(RC_HT_2040 | RC_SS | RC_DS)
+#define RC_L_SDT		(RC_LEGACY | RC_SS | RC_DS | RC_TS)
 #define RC_HT_S_20		(RC_HT_20 | RC_SS)
-#define RC_HT_SD_20		(RC_HT_20 | RC_SS | RC_DS)
-#define RC_HT_SD_40		(RC_HT_40 | RC_SS | RC_DS)
-#define RC_HT_S_20		(RC_HT_20 | RC_SS)
-#define RC_HT_S_40		(RC_HT_40 | RC_SS)
 #define RC_HT_D_20		(RC_HT_20 | RC_DS)
+#define RC_HT_T_20		(RC_HT_20 | RC_TS)
+#define RC_HT_S_40		(RC_HT_40 | RC_SS)
 #define RC_HT_D_40		(RC_HT_40 | RC_DS)
+#define RC_HT_T_40		(RC_HT_40 | RC_TS)
+
+#define RC_HT_SD_20		(RC_HT_20 | RC_SS | RC_DS)
+#define RC_HT_DT_20		(RC_HT_20 | RC_DS | RC_TS)
+#define RC_HT_SD_40		(RC_HT_40 | RC_SS | RC_DS)
+#define RC_HT_DT_40		(RC_HT_40 | RC_DS | RC_TS)
+
+#define RC_HT_SD_2040		(RC_HT_2040 | RC_SS | RC_DS)
+#define RC_HT_SDT_2040		(RC_HT_2040 | RC_SS | RC_DS | RC_TS)
+
+#define RC_HT_SDT_20		(RC_HT_20 | RC_SS | RC_DS | RC_TS)
+#define RC_HT_SDT_40		(RC_HT_40 | RC_SS | RC_DS | RC_TS)
+
 #define RC_ALL			(RC_LEGACY | RC_HT_2040 | RC_ALL_STREAM)
 
 enum {
@@ -56,12 +71,16 @@ enum {
 	WLAN_RC_PHY_CCK,
 	WLAN_RC_PHY_HT_20_SS,
 	WLAN_RC_PHY_HT_20_DS,
+	WLAN_RC_PHY_HT_20_TS,
 	WLAN_RC_PHY_HT_40_SS,
 	WLAN_RC_PHY_HT_40_DS,
+	WLAN_RC_PHY_HT_40_TS,
 	WLAN_RC_PHY_HT_20_SS_HGI,
 	WLAN_RC_PHY_HT_20_DS_HGI,
+	WLAN_RC_PHY_HT_20_TS_HGI,
 	WLAN_RC_PHY_HT_40_SS_HGI,
 	WLAN_RC_PHY_HT_40_DS_HGI,
+	WLAN_RC_PHY_HT_40_TS_HGI,
 	WLAN_RC_PHY_MAX
 };
 
@@ -69,27 +88,36 @@ enum {
 				|| (_phy == WLAN_RC_PHY_HT_40_DS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
+#define WLAN_RC_PHY_TS(_phy)   ((_phy == WLAN_RC_PHY_HT_20_TS)		\
+				|| (_phy == WLAN_RC_PHY_HT_40_TS)	\
+				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI)	\
+				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
 #define WLAN_RC_PHY_20(_phy)   ((_phy == WLAN_RC_PHY_HT_20_SS)		\
 				|| (_phy == WLAN_RC_PHY_HT_20_DS)	\
+				|| (_phy == WLAN_RC_PHY_HT_20_TS)	\
 				|| (_phy == WLAN_RC_PHY_HT_20_SS_HGI)	\
-				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI))
+				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)	\
+				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI))
 #define WLAN_RC_PHY_40(_phy)   ((_phy == WLAN_RC_PHY_HT_40_SS)		\
 				|| (_phy == WLAN_RC_PHY_HT_40_DS)	\
+				|| (_phy == WLAN_RC_PHY_HT_40_TS)	\
 				|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI)	\
-				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
+				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI)	\
+				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
 #define WLAN_RC_PHY_SGI(_phy)  ((_phy == WLAN_RC_PHY_HT_20_SS_HGI)      \
 				|| (_phy == WLAN_RC_PHY_HT_20_DS_HGI)   \
+				|| (_phy == WLAN_RC_PHY_HT_20_TS_HGI)   \
 				|| (_phy == WLAN_RC_PHY_HT_40_SS_HGI)   \
-				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI))
+				|| (_phy == WLAN_RC_PHY_HT_40_DS_HGI)   \
+				|| (_phy == WLAN_RC_PHY_HT_40_TS_HGI))
 
 #define WLAN_RC_PHY_HT(_phy)    (_phy >= WLAN_RC_PHY_HT_20_SS)
 
 #define WLAN_RC_CAP_MODE(capflag) (((capflag & WLAN_RC_HT_FLAG) ?	\
 	((capflag & WLAN_RC_40_FLAG) ? RC_HT_40 : RC_HT_20) : RC_LEGACY))
 
-#define WLAN_RC_CAP_STREAM(capflag) \
-	(((capflag) & WLAN_RC_DS_FLAG) ? RC_DS : RC_SS)
-
+#define WLAN_RC_CAP_STREAM(capflag) (((capflag & WLAN_RC_TS_FLAG) ?	\
+	(RC_TS) : ((capflag & WLAN_RC_DS_FLAG) ? RC_DS : RC_SS)))
 
 /* Return TRUE if flag supports HT20 && client supports HT20 or
  * return TRUE if flag supports HT40 && client supports HT40.
@@ -100,9 +128,10 @@ enum {
 	 ((flag & RC_HT_40) && (capflag & WLAN_RC_40_FLAG)))
 
 #define WLAN_RC_DS_FLAG         (0x01)
-#define WLAN_RC_40_FLAG         (0x02)
-#define WLAN_RC_SGI_FLAG        (0x04)
-#define WLAN_RC_HT_FLAG         (0x08)
+#define WLAN_RC_TS_FLAG         (0x02)
+#define WLAN_RC_40_FLAG         (0x04)
+#define WLAN_RC_SGI_FLAG        (0x08)
+#define WLAN_RC_HT_FLAG         (0x10)
 
 /**
  * struct ath_rate_table - Rate Control table