ath9k_hw: Read and configure antenna diversity control for AR9485

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

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c

@@ -3034,6 +3034,8 @@ static u32 ath9k_hw_ar9300_get_eeprom(struct ath_hw *ah,
 		return !!(pBase->featureEnable & BIT(5));
 	case EEP_CHAIN_MASK_REDUCE:
 		return (pBase->miscConfiguration >> 0x3) & 0x1;
+	case EEP_ANT_DIV_CTL1:
+		return le32_to_cpu(eep->base_ext1.ant_div_control);
 	default:
 		return 0;
 	}
@@ -3513,11 +3515,25 @@ static void ar9003_hw_ant_ctrl_apply(struct ath_hw *ah, bool is2ghz)
 	value = ar9003_hw_ant_ctrl_chain_get(ah, 0, is2ghz);
 	REG_RMW_FIELD(ah, AR_PHY_SWITCH_CHAIN_0, AR_SWITCH_TABLE_ALL, value);
 
+	if (!AR_SREV_9485(ah)) {
 		value = ar9003_hw_ant_ctrl_chain_get(ah, 1, is2ghz);
-	REG_RMW_FIELD(ah, AR_PHY_SWITCH_CHAIN_1, AR_SWITCH_TABLE_ALL, value);
+		REG_RMW_FIELD(ah, AR_PHY_SWITCH_CHAIN_1, AR_SWITCH_TABLE_ALL,
+			      value);
 
 		value = ar9003_hw_ant_ctrl_chain_get(ah, 2, is2ghz);
-	REG_RMW_FIELD(ah, AR_PHY_SWITCH_CHAIN_2, AR_SWITCH_TABLE_ALL, value);
+		REG_RMW_FIELD(ah, AR_PHY_SWITCH_CHAIN_2, AR_SWITCH_TABLE_ALL,
+			      value);
+	}
+
+	if (AR_SREV_9485(ah)) {
+		value = ath9k_hw_ar9300_get_eeprom(ah, EEP_ANT_DIV_CTL1);
+		REG_RMW_FIELD(ah, AR_PHY_MC_GAIN_CTRL, AR_ANT_DIV_CTRL_ALL,
+			      value);
+		REG_RMW_FIELD(ah, AR_PHY_MC_GAIN_CTRL, AR_ANT_DIV_ENABLE,
+			      value >> 6);
+		REG_RMW_FIELD(ah, AR_PHY_CCK_DETECT, AR_FAST_DIV_ENABLE,
+			      value >> 7);
+	}
 }
 
 static void ar9003_hw_drive_strength_apply(struct ath_hw *ah)

drivers/net/wireless/ath/ath9k/ar9003_phy.h

@@ -260,7 +260,13 @@
 #define AR_PHY_CCA_0            (AR_AGC_BASE + 0x1c)
 #define AR_PHY_EXT_CCA0         (AR_AGC_BASE + 0x20)
 #define AR_PHY_RESTART          (AR_AGC_BASE + 0x24)
+
 #define AR_PHY_MC_GAIN_CTRL     (AR_AGC_BASE + 0x28)
+#define AR_ANT_DIV_CTRL_ALL	0x7e000000
+#define AR_ANT_DIV_CTRL_ALL_S	25
+#define AR_ANT_DIV_ENABLE	0x1000000
+#define AR_ANT_DIV_ENABLE_S	24
+
 #define AR_PHY_EXTCHN_PWRTHR1   (AR_AGC_BASE + 0x2c)
 #define AR_PHY_EXT_CHN_WIN      (AR_AGC_BASE + 0x30)
 #define AR_PHY_20_40_DET_THR    (AR_AGC_BASE + 0x34)
@@ -271,7 +277,11 @@
 #define AR_PHY_RX_GAIN_BOUNDS_2 (AR_AGC_BASE + 0x48)
 #define AR_PHY_RSSI_0           (AR_AGC_BASE + 0x180)
 #define AR_PHY_SPUR_CCK_REP0    (AR_AGC_BASE + 0x184)
+
 #define AR_PHY_CCK_DETECT       (AR_AGC_BASE + 0x1c0)
+#define AR_FAST_DIV_ENABLE	0x2000
+#define AR_FAST_DIV_ENABLE_S	13
+
 #define AR_PHY_DAG_CTRLCCK      (AR_AGC_BASE + 0x1c4)
 #define AR_PHY_IQCORR_CTRL_CCK  (AR_AGC_BASE + 0x1c8)