1 files changed, 37 insertions, 27 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
index be466b0ef7a..ba502a2d199 100644
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -155,6 +155,9 @@ static void ath9k_hw_set_ofdm_nil(struct ath_hw *ah, u8 immunityLevel,
 		ATH9K_ANI_RSSI_THR_LOW,
 		ATH9K_ANI_RSSI_THR_HIGH);
 
+	if (AR_SREV_9100(ah) && immunityLevel < ATH9K_ANI_OFDM_DEF_LEVEL)
+		immunityLevel = ATH9K_ANI_OFDM_DEF_LEVEL;
+
 	if (!scan)
 		aniState->ofdmNoiseImmunityLevel = immunityLevel;
 
@@ -176,16 +179,26 @@ static void ath9k_hw_set_ofdm_nil(struct ath_hw *ah, u8 immunityLevel,
 	if (ah->opmode == NL80211_IFTYPE_STATION &&
 	    BEACON_RSSI(ah) <= ATH9K_ANI_RSSI_THR_HIGH)
 		weak_sig = true;
-
 	/*
-	 * OFDM Weak signal detection is always enabled for AP mode.
+	 * Newer chipsets are better at dealing with high PHY error counts -
+	 * keep weak signal detection enabled when no RSSI threshold is
+	 * available to determine if it is needed (mode != STA)
 	 */
-	if (ah->opmode != NL80211_IFTYPE_AP &&
-	    aniState->ofdmWeakSigDetect != weak_sig) {
-		ath9k_hw_ani_control(ah,
-				     ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
-				     entry_ofdm->ofdm_weak_signal_on);
-	}
+	else if (AR_SREV_9300_20_OR_LATER(ah) &&
+		 ah->opmode != NL80211_IFTYPE_STATION)
+		weak_sig = true;
+
+	/* Older chipsets are more sensitive to high PHY error counts */
+	else if (!AR_SREV_9300_20_OR_LATER(ah) &&
+		 aniState->ofdmNoiseImmunityLevel >= 8)
+		weak_sig = false;
+
+	if (aniState->ofdmWeakSigDetect != weak_sig)
+		ath9k_hw_ani_control(ah, ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
+				     weak_sig);
+
+	if (!AR_SREV_9300_20_OR_LATER(ah))
+		return;
 
 	if (aniState->ofdmNoiseImmunityLevel >= ATH9K_ANI_OFDM_DEF_LEVEL) {
 		ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
@@ -225,6 +238,9 @@ static void ath9k_hw_set_cck_nil(struct ath_hw *ah, u_int8_t immunityLevel,
 		BEACON_RSSI(ah), ATH9K_ANI_RSSI_THR_LOW,
 		ATH9K_ANI_RSSI_THR_HIGH);
 
+	if (AR_SREV_9100(ah) && immunityLevel < ATH9K_ANI_CCK_DEF_LEVEL)
+		immunityLevel = ATH9K_ANI_CCK_DEF_LEVEL;
+
 	if (ah->opmode == NL80211_IFTYPE_STATION &&
 	    BEACON_RSSI(ah) <= ATH9K_ANI_RSSI_THR_LOW &&
 	    immunityLevel > ATH9K_ANI_CCK_MAX_LEVEL_LOW_RSSI)
@@ -308,17 +324,6 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning)
 	BUG_ON(aniState == NULL);
 	ah->stats.ast_ani_reset++;
 
-	/* only allow a subset of functions in AP mode */
-	if (ah->opmode == NL80211_IFTYPE_AP) {
-		if (IS_CHAN_2GHZ(chan)) {
-			ah->ani_function = (ATH9K_ANI_SPUR_IMMUNITY_LEVEL |
-					    ATH9K_ANI_FIRSTEP_LEVEL);
-			if (AR_SREV_9300_20_OR_LATER(ah))
-				ah->ani_function |= ATH9K_ANI_MRC_CCK;
-		} else
-			ah->ani_function = 0;
-	}
-
 	ofdm_nil = max_t(int, ATH9K_ANI_OFDM_DEF_LEVEL,
 			 aniState->ofdmNoiseImmunityLevel);
 	cck_nil = max_t(int, ATH9K_ANI_CCK_DEF_LEVEL,
@@ -338,10 +343,9 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning)
 		    aniState->cckNoiseImmunityLevel !=
 		    ATH9K_ANI_CCK_DEF_LEVEL) {
 			ath_dbg(common, ANI,
-				"Restore defaults: opmode %u chan %d Mhz/0x%x is_scanning=%d ofdm:%d cck:%d\n",
+				"Restore defaults: opmode %u chan %d Mhz is_scanning=%d ofdm:%d cck:%d\n",
 				ah->opmode,
 				chan->channel,
-				chan->channelFlags,
 				is_scanning,
 				aniState->ofdmNoiseImmunityLevel,
 				aniState->cckNoiseImmunityLevel);
@@ -354,10 +358,9 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning)
 		 * restore historical levels for this channel
 		 */
 		ath_dbg(common, ANI,
-			"Restore history: opmode %u chan %d Mhz/0x%x is_scanning=%d ofdm:%d cck:%d\n",
+			"Restore history: opmode %u chan %d Mhz is_scanning=%d ofdm:%d cck:%d\n",
 			ah->opmode,
 			chan->channel,
-			chan->channelFlags,
 			is_scanning,
 			aniState->ofdmNoiseImmunityLevel,
 			aniState->cckNoiseImmunityLevel);
@@ -485,10 +488,17 @@ void ath9k_hw_ani_init(struct ath_hw *ah)
 
 	ath_dbg(common, ANI, "Initialize ANI\n");
 
-	ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
-	ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW;
-	ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH;
-	ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW;
+	if (AR_SREV_9300_20_OR_LATER(ah)) {
+		ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
+		ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW;
+		ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH;
+		ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW;
+	} else {
+		ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH_OLD;
+		ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW_OLD;
+		ah->config.cck_trig_high = ATH9K_ANI_CCK_TRIG_HIGH_OLD;
+		ah->config.cck_trig_low = ATH9K_ANI_CCK_TRIG_LOW_OLD;
+	}
 
 	ani->spurImmunityLevel = ATH9K_ANI_SPUR_IMMUNE_LVL;
 	ani->firstepLevel = ATH9K_ANI_FIRSTEP_LVL;