ath9k: add some ani related stability / performance fixes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

Backport of r42443

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42444 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/mac80211/patches/300-pending_work.patch

+commit 0fecedddd4a0945873db1bd230ec6a168b3cc4fe
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Mon Sep 8 18:35:08 2014 +0200
+
+    ath9k_hw: reduce ANI spur immunity setting on HT40 extension channel
+    
+    The cycpwr_thr1 value needs to be lower on the extension channel than on
+    the control channel, similar to how the register settings are programmed
+    in the initvals.
+    
+    Also drop the unnecessary check for HT40 - this register can always be
+    written. This patch has been reported to improve HT40 stability and
+    throughput in some environments.
+    
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+commit 30d7434ccb853b96de698a040888fa4dacd0cc19
+Author: Felix Fietkau <nbd@openwrt.org>
+Date:   Mon Sep 8 18:31:26 2014 +0200
+
+    Revert "ath9k_hw: reduce ANI firstep range for older chips"
+    
+    This reverts commit 09efc56345be4146ab9fc87a55c837ed5d6ea1ab
+    
+    I've received reports that this change is decreasing throughput in some
+    rare conditions on an AR9280 based device
+    
+    Cc: stable@vger.kernel.org
+    Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
 commit 15ed54948f508ad1baad79c30050e2d29a21696d
 Author: Felix Fietkau <nbd@openwrt.org>
 Date:   Fri Jul 25 16:18:03 2014 +0200
@@ -3109,3 +3139,30 @@ Date:   Mon May 19 21:20:49 2014 +0200
  
  		if (!compat)
  			compat = &sdata->vif.bss_conf.chandef;
+--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+@@ -1004,9 +1004,11 @@ static bool ar5008_hw_ani_control_new(st
+ 	case ATH9K_ANI_FIRSTEP_LEVEL:{
+ 		u32 level = param;
+ 
+-		value = level;
++		value = level * 2;
+ 		REG_RMW_FIELD(ah, AR_PHY_FIND_SIG,
+ 			      AR_PHY_FIND_SIG_FIRSTEP, value);
++		REG_RMW_FIELD(ah, AR_PHY_FIND_SIG_LOW,
++			      AR_PHY_FIND_SIG_FIRSTEP_LOW, value);
+ 
+ 		if (level != aniState->firstepLevel) {
+ 			ath_dbg(common, ANI,
+@@ -1040,9 +1042,8 @@ static bool ar5008_hw_ani_control_new(st
+ 		REG_RMW_FIELD(ah, AR_PHY_TIMING5,
+ 			      AR_PHY_TIMING5_CYCPWR_THR1, value);
+ 
+-		if (IS_CHAN_HT40(ah->curchan))
+-			REG_RMW_FIELD(ah, AR_PHY_EXT_CCA,
+-				      AR_PHY_EXT_TIMING5_CYCPWR_THR1, value);
++		REG_RMW_FIELD(ah, AR_PHY_EXT_CCA,
++				  AR_PHY_EXT_TIMING5_CYCPWR_THR1, value - 1);
+ 
+ 		if (level != aniState->spurImmunityLevel) {
+ 			ath_dbg(common, ANI,

package/kernel/mac80211/patches/550-ath9k_entropy_from_adc.patch

@@ -110,7 +110,7 @@
  static inline void ath9k_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable)
 --- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
 +++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
-@@ -1231,9 +1231,30 @@ static void ar5008_hw_set_radar_conf(str
+@@ -1232,9 +1232,30 @@ static void ar5008_hw_set_radar_conf(str
  	conf->radar_inband = 8;
  }
  
@@ -141,7 +141,7 @@
  	static const u32 ar5416_cca_regs[6] = {
  		AR_PHY_CCA,
  		AR_PHY_CH1_CCA,
-@@ -1248,6 +1269,8 @@ int ar5008_hw_attach_phy_ops(struct ath_
+@@ -1249,6 +1270,8 @@ int ar5008_hw_attach_phy_ops(struct ath_
  	if (ret)
  	    return ret;