ath9k: add a few fixes and cleanups

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23198 3c298f89-4303-0410-b956-a3cf2f4a3e73

6 files changed, 1058 insertions, 0 deletions

diff --git a/package/mac80211/patches/530-ath9k_remove_calinitdata.patch b/package/mac80211/patches/530-ath9k_remove_calinitdata.patch
new file mode 100644
index 000000000..78425e1dc
--- /dev/null
+++ b/package/mac80211/patches/530-ath9k_remove_calinitdata.patch
@@ -0,0 +1,75 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+@@ -45,11 +45,6 @@ static void ar9002_hw_setup_calibration(
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+ 			  "starting ADC DC Calibration\n");
+ 		break;
+-	case ADC_DC_INIT_CAL:
+-		REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT);
+-		ath_print(common, ATH_DBG_CALIBRATE,
+-			  "starting Init ADC DC Calibration\n");
+-		break;
+ 	case TEMP_COMP_CAL:
+ 		break; /* Not supported */
+ 	}
+@@ -950,13 +945,6 @@ static const struct ath9k_percal_data ad
+ 	ar9002_hw_adc_dccal_collect,
+ 	ar9002_hw_adc_dccal_calibrate
+ };
+-static const struct ath9k_percal_data adc_init_dc_cal = {
+-	ADC_DC_INIT_CAL,
+-	MIN_CAL_SAMPLES,
+-	INIT_LOG_COUNT,
+-	ar9002_hw_adc_dccal_collect,
+-	ar9002_hw_adc_dccal_calibrate
+-};
+ 
+ static void ar9002_hw_init_cal_settings(struct ath_hw *ah)
+ {
+@@ -973,16 +961,12 @@ static void ar9002_hw_init_cal_settings(
+ 				&adc_gain_cal_single_sample;
+ 			ah->adcdc_caldata.calData =
+ 				&adc_dc_cal_single_sample;
+-			ah->adcdc_calinitdata.calData =
+-				&adc_init_dc_cal;
+ 		} else {
+ 			ah->iq_caldata.calData = &iq_cal_multi_sample;
+ 			ah->adcgain_caldata.calData =
+ 				&adc_gain_cal_multi_sample;
+ 			ah->adcdc_caldata.calData =
+ 				&adc_dc_cal_multi_sample;
+-			ah->adcdc_calinitdata.calData =
+-				&adc_init_dc_cal;
+ 		}
+ 		ah->supp_cals = ADC_GAIN_CAL | ADC_DC_CAL | IQ_MISMATCH_CAL;
+ 	}
+--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+@@ -50,7 +50,6 @@ static void ar9003_hw_setup_calibration(
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+ 			  "starting Temperature Compensation Calibration\n");
+ 		break;
+-	case ADC_DC_INIT_CAL:
+ 	case ADC_GAIN_CAL:
+ 	case ADC_DC_CAL:
+ 		/* Not yet */
+--- a/drivers/net/wireless/ath/ath9k/calib.h
++++ b/drivers/net/wireless/ath/ath9k/calib.h
+@@ -59,7 +59,6 @@ struct ar5416IniArray {
+ 	} while (0)
+ 
+ enum ath9k_cal_types {
+-	ADC_DC_INIT_CAL = 0x1,
+ 	ADC_GAIN_CAL = 0x2,
+ 	ADC_DC_CAL = 0x4,
+ 	IQ_MISMATCH_CAL = 0x8,
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -692,7 +692,6 @@ struct ath_hw {
+ 	enum ath9k_cal_types supp_cals;
+ 	struct ath9k_cal_list iq_caldata;
+ 	struct ath9k_cal_list adcgain_caldata;
+-	struct ath9k_cal_list adcdc_calinitdata;
+ 	struct ath9k_cal_list adcdc_caldata;
+ 	struct ath9k_cal_list tempCompCalData;
+ 	struct ath9k_cal_list *cal_list;
diff --git a/package/mac80211/patches/531-ath9k_cal_cleanup.patch b/package/mac80211/patches/531-ath9k_cal_cleanup.patch
new file mode 100644
index 000000000..3a14d5289
--- /dev/null
+++ b/package/mac80211/patches/531-ath9k_cal_cleanup.patch
@@ -0,0 +1,248 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -535,8 +535,6 @@ struct ath_hw_private_ops {
+ 	bool (*macversion_supported)(u32 macversion);
+ 	void (*setup_calibration)(struct ath_hw *ah,
+ 				  struct ath9k_cal_list *currCal);
+-	bool (*iscal_supported)(struct ath_hw *ah,
+-				enum ath9k_cal_types calType);
+ 
+ 	/* PHY ops */
+ 	int (*rf_set_freq)(struct ath_hw *ah,
+@@ -689,7 +687,7 @@ struct ath_hw {
+ 	u32 atim_window;
+ 
+ 	/* Calibration */
+-	enum ath9k_cal_types supp_cals;
++	u32 supp_cals;
+ 	struct ath9k_cal_list iq_caldata;
+ 	struct ath9k_cal_list adcgain_caldata;
+ 	struct ath9k_cal_list adcdc_caldata;
+--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+@@ -20,6 +20,13 @@
+ 
+ #define AR9285_CLCAL_REDO_THRESH    1
+ 
++enum ar9002_cal_types {
++	ADC_GAIN_CAL = BIT(0),
++	ADC_DC_CAL = BIT(1),
++	IQ_MISMATCH_CAL = BIT(2),
++};
++
++
+ static void ar9002_hw_setup_calibration(struct ath_hw *ah,
+ 					struct ath9k_cal_list *currCal)
+ {
+@@ -45,8 +52,6 @@ static void ar9002_hw_setup_calibration(
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+ 			  "starting ADC DC Calibration\n");
+ 		break;
+-	case TEMP_COMP_CAL:
+-		break; /* Not supported */
+ 	}
+ 
+ 	REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4(0),
+@@ -91,25 +96,6 @@ static bool ar9002_hw_per_calibration(st
+ 	return iscaldone;
+ }
+ 
+-/* Assumes you are talking about the currently configured channel */
+-static bool ar9002_hw_iscal_supported(struct ath_hw *ah,
+-				      enum ath9k_cal_types calType)
+-{
+-	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
+-
+-	switch (calType & ah->supp_cals) {
+-	case IQ_MISMATCH_CAL: /* Both 2 GHz and 5 GHz support OFDM */
+-		return true;
+-	case ADC_GAIN_CAL:
+-	case ADC_DC_CAL:
+-		if (!(conf->channel->band == IEEE80211_BAND_2GHZ &&
+-		      conf_is_ht20(conf)))
+-			return true;
+-		break;
+-	}
+-	return false;
+-}
+-
+ static void ar9002_hw_iqcal_collect(struct ath_hw *ah)
+ {
+ 	int i;
+@@ -872,24 +858,28 @@ static bool ar9002_hw_init_cal(struct at
+ 
+ 	/* Enable IQ, ADC Gain and ADC DC offset CALs */
+ 	if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah)) {
+-		if (ar9002_hw_iscal_supported(ah, ADC_GAIN_CAL)) {
++		ah->supp_cals = IQ_MISMATCH_CAL;
++
++		if (AR_SREV_9160_10_OR_LATER(ah) &&
++		    !(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan))) {
++			ah->supp_cals |= ADC_GAIN_CAL | ADC_DC_CAL;
++
++
+ 			INIT_CAL(&ah->adcgain_caldata);
+ 			INSERT_CAL(ah, &ah->adcgain_caldata);
+ 			ath_print(common, ATH_DBG_CALIBRATE,
+ 				  "enabling ADC Gain Calibration.\n");
+-		}
+-		if (ar9002_hw_iscal_supported(ah, ADC_DC_CAL)) {
++
+ 			INIT_CAL(&ah->adcdc_caldata);
+ 			INSERT_CAL(ah, &ah->adcdc_caldata);
+ 			ath_print(common, ATH_DBG_CALIBRATE,
+ 				  "enabling ADC DC Calibration.\n");
+ 		}
+-		if (ar9002_hw_iscal_supported(ah, IQ_MISMATCH_CAL)) {
+-			INIT_CAL(&ah->iq_caldata);
+-			INSERT_CAL(ah, &ah->iq_caldata);
+-			ath_print(common, ATH_DBG_CALIBRATE,
+-				  "enabling IQ Calibration.\n");
+-		}
++
++		INIT_CAL(&ah->iq_caldata);
++		INSERT_CAL(ah, &ah->iq_caldata);
++		ath_print(common, ATH_DBG_CALIBRATE,
++			  "enabling IQ Calibration.\n");
+ 
+ 		ah->cal_list_curr = ah->cal_list;
+ 
+@@ -980,7 +970,6 @@ void ar9002_hw_attach_calib_ops(struct a
+ 	priv_ops->init_cal_settings = ar9002_hw_init_cal_settings;
+ 	priv_ops->init_cal = ar9002_hw_init_cal;
+ 	priv_ops->setup_calibration = ar9002_hw_setup_calibration;
+-	priv_ops->iscal_supported = ar9002_hw_iscal_supported;
+ 
+ 	ops->calibrate = ar9002_hw_calibrate;
+ }
+--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+@@ -18,6 +18,11 @@
+ #include "hw-ops.h"
+ #include "ar9003_phy.h"
+ 
++enum ar9003_cal_types {
++	IQ_MISMATCH_CAL = BIT(0),
++	TEMP_COMP_CAL = BIT(1),
++};
++
+ static void ar9003_hw_setup_calibration(struct ath_hw *ah,
+ 					struct ath9k_cal_list *currCal)
+ {
+@@ -50,10 +55,6 @@ static void ar9003_hw_setup_calibration(
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+ 			  "starting Temperature Compensation Calibration\n");
+ 		break;
+-	case ADC_GAIN_CAL:
+-	case ADC_DC_CAL:
+-		/* Not yet */
+-		break;
+ 	}
+ }
+ 
+@@ -313,27 +314,6 @@ static const struct ath9k_percal_data iq
+ static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
+ {
+ 	ah->iq_caldata.calData = &iq_cal_single_sample;
+-	ah->supp_cals = IQ_MISMATCH_CAL;
+-}
+-
+-static bool ar9003_hw_iscal_supported(struct ath_hw *ah,
+-				      enum ath9k_cal_types calType)
+-{
+-	switch (calType & ah->supp_cals) {
+-	case IQ_MISMATCH_CAL:
+-		/*
+-		 * XXX: Run IQ Mismatch for non-CCK only
+-		 * Note that CHANNEL_B is never set though.
+-		 */
+-		return true;
+-	case ADC_GAIN_CAL:
+-	case ADC_DC_CAL:
+-		return false;
+-	case TEMP_COMP_CAL:
+-		return true;
+-	}
+-
+-	return false;
+ }
+ 
+ /*
+@@ -772,15 +752,16 @@ static bool ar9003_hw_init_cal(struct at
+ 
+ 	/* Initialize list pointers */
+ 	ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
++	ah->supp_cals = IQ_MISMATCH_CAL;
+ 
+-	if (ar9003_hw_iscal_supported(ah, IQ_MISMATCH_CAL)) {
++	if (ah->supp_cals & IQ_MISMATCH_CAL) {
+ 		INIT_CAL(&ah->iq_caldata);
+ 		INSERT_CAL(ah, &ah->iq_caldata);
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+ 			  "enabling IQ Calibration.\n");
+ 	}
+ 
+-	if (ar9003_hw_iscal_supported(ah, TEMP_COMP_CAL)) {
++	if (ah->supp_cals & TEMP_COMP_CAL) {
+ 		INIT_CAL(&ah->tempCompCalData);
+ 		INSERT_CAL(ah, &ah->tempCompCalData);
+ 		ath_print(common, ATH_DBG_CALIBRATE,
+@@ -807,7 +788,6 @@ void ar9003_hw_attach_calib_ops(struct a
+ 	priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
+ 	priv_ops->init_cal = ar9003_hw_init_cal;
+ 	priv_ops->setup_calibration = ar9003_hw_setup_calibration;
+-	priv_ops->iscal_supported = ar9003_hw_iscal_supported;
+ 
+ 	ops->calibrate = ar9003_hw_calibrate;
+ }
+--- a/drivers/net/wireless/ath/ath9k/calib.h
++++ b/drivers/net/wireless/ath/ath9k/calib.h
+@@ -58,13 +58,6 @@ struct ar5416IniArray {
+ 		}							\
+ 	} while (0)
+ 
+-enum ath9k_cal_types {
+-	ADC_GAIN_CAL = 0x2,
+-	ADC_DC_CAL = 0x4,
+-	IQ_MISMATCH_CAL = 0x8,
+-	TEMP_COMP_CAL = 0x10,
+-};
+-
+ enum ath9k_cal_state {
+ 	CAL_INACTIVE,
+ 	CAL_WAITING,
+@@ -79,7 +72,7 @@ enum ath9k_cal_state {
+ #define PER_MAX_LOG_COUNT  10
+ 
+ struct ath9k_percal_data {
+-	enum ath9k_cal_types calType;
++	u32 calType;
+ 	u32 calNumSamples;
+ 	u32 calCountMax;
+ 	void (*calCollect) (struct ath_hw *);
+--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
++++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
+@@ -276,12 +276,6 @@ static inline void ath9k_hw_setup_calibr
+ 	ath9k_hw_private_ops(ah)->setup_calibration(ah, currCal);
+ }
+ 
+-static inline bool ath9k_hw_iscal_supported(struct ath_hw *ah,
+-					    enum ath9k_cal_types calType)
+-{
+-	return ath9k_hw_private_ops(ah)->iscal_supported(ah, calType);
+-}
+-
+ static inline void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning)
+ {
+ 	ath9k_hw_private_ops(ah)->ani_reset(ah, is_scanning);
+--- a/drivers/net/wireless/ath/ath9k/calib.c
++++ b/drivers/net/wireless/ath/ath9k/calib.c
+@@ -186,7 +186,7 @@ bool ath9k_hw_reset_calvalid(struct ath_
+ 		return true;
+ 	}
+ 
+-	if (!ath9k_hw_iscal_supported(ah, currCal->calData->calType))
++	if (!(ah->supp_cals & currCal->calData->calType))
+ 		return true;
+ 
+ 	ath_print(common, ATH_DBG_CALIBRATE,
diff --git a/package/mac80211/patches/540-ath9k_cycle_counters_cleanup.patch b/package/mac80211/patches/540-ath9k_cycle_counters_cleanup.patch
new file mode 100644
index 000000000..89af14691
--- /dev/null
+++ b/package/mac80211/patches/540-ath9k_cycle_counters_cleanup.patch
@@ -0,0 +1,282 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -765,6 +765,8 @@ struct ath_hw {
+ 	int coarse_low[5];
+ 	int firpwr[5];
+ 	enum ath9k_ani_cmd ani_function;
++	struct ath_cycle_counters cc, cc_delta;
++	int32_t listen_time;
+ 
+ 	/* Bluetooth coexistance */
+ 	struct ath_btcoex_hw btcoex_hw;
+--- a/drivers/net/wireless/ath/ath9k/ani.c
++++ b/drivers/net/wireless/ath/ath9k/ani.c
+@@ -549,47 +549,15 @@ static u8 ath9k_hw_chan_2_clockrate_mhz(
+ 
+ static int32_t ath9k_hw_ani_get_listen_time(struct ath_hw *ah)
+ {
+-	struct ar5416AniState *aniState;
+-	struct ath_common *common = ath9k_hw_common(ah);
+-	u32 txFrameCount, rxFrameCount, cycleCount;
+-	int32_t listenTime;
+-
+-	txFrameCount = REG_READ(ah, AR_TFCNT);
+-	rxFrameCount = REG_READ(ah, AR_RFCNT);
+-	cycleCount = REG_READ(ah, AR_CCCNT);
+-
+-	aniState = ah->curani;
+-	if (aniState->cycleCount == 0 || aniState->cycleCount > cycleCount) {
+-		listenTime = 0;
+-		ah->stats.ast_ani_lzero++;
+-		ath_print(common, ATH_DBG_ANI,
+-			  "1st call: aniState->cycleCount=%d\n",
+-			  aniState->cycleCount);
+-	} else {
+-		int32_t ccdelta = cycleCount - aniState->cycleCount;
+-		int32_t rfdelta = rxFrameCount - aniState->rxFrameCount;
+-		int32_t tfdelta = txFrameCount - aniState->txFrameCount;
+-		int32_t clock_rate;
+-
+-		/*
+-		 * convert HW counter values to ms using mode
+-		 * specifix clock rate
+-		 */
+-		clock_rate = ath9k_hw_chan_2_clockrate_mhz(ah) * 1000;;
++	int32_t listen_time;
++	int32_t clock_rate;
+ 
+-		listenTime = (ccdelta - rfdelta - tfdelta) / clock_rate;
++	ath9k_hw_update_cycle_counters(ah);
++	clock_rate = ath9k_hw_chan_2_clockrate_mhz(ah) * 1000;
++	listen_time = ah->listen_time / clock_rate;
++	ah->listen_time = 0;
+ 
+-		ath_print(common, ATH_DBG_ANI,
+-			  "cyclecount=%d, rfcount=%d, "
+-			  "tfcount=%d, listenTime=%d CLOCK_RATE=%d\n",
+-			  ccdelta, rfdelta, tfdelta, listenTime, clock_rate);
+-	}
+-
+-	aniState->cycleCount = cycleCount;
+-	aniState->txFrameCount = txFrameCount;
+-	aniState->rxFrameCount = rxFrameCount;
+-
+-	return listenTime;
++	return listen_time;
+ }
+ 
+ static void ath9k_ani_reset_old(struct ath_hw *ah, bool is_scanning)
+@@ -1041,45 +1009,52 @@ void ath9k_hw_disable_mib_counters(struc
+ }
+ EXPORT_SYMBOL(ath9k_hw_disable_mib_counters);
+ 
+-u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah,
+-				  u32 *rxc_pcnt,
+-				  u32 *rxf_pcnt,
+-				  u32 *txf_pcnt)
++void ath9k_hw_update_cycle_counters(struct ath_hw *ah)
+ {
+-	struct ath_common *common = ath9k_hw_common(ah);
+-	static u32 cycles, rx_clear, rx_frame, tx_frame;
+-	u32 good = 1;
++	struct ath_cycle_counters cc;
++	bool clear;
+ 
+-	u32 rc = REG_READ(ah, AR_RCCNT);
+-	u32 rf = REG_READ(ah, AR_RFCNT);
+-	u32 tf = REG_READ(ah, AR_TFCNT);
+-	u32 cc = REG_READ(ah, AR_CCCNT);
++	memcpy(&cc, &ah->cc, sizeof(cc));
+ 
+-	if (cycles == 0 || cycles > cc) {
+-		ath_print(common, ATH_DBG_ANI,
+-			  "cycle counter wrap. ExtBusy = 0\n");
+-		good = 0;
+-	} else {
+-		u32 cc_d = cc - cycles;
+-		u32 rc_d = rc - rx_clear;
+-		u32 rf_d = rf - rx_frame;
+-		u32 tf_d = tf - tx_frame;
+-
+-		if (cc_d != 0) {
+-			*rxc_pcnt = rc_d * 100 / cc_d;
+-			*rxf_pcnt = rf_d * 100 / cc_d;
+-			*txf_pcnt = tf_d * 100 / cc_d;
+-		} else {
+-			good = 0;
+-		}
+-	}
++	/* freeze counters */
++	REG_WRITE(ah, AR_MIBC, AR_MIBC_FMC);
+ 
+-	cycles = cc;
+-	rx_frame = rf;
+-	rx_clear = rc;
+-	tx_frame = tf;
++	ah->cc.cycles = REG_READ(ah, AR_CCCNT);
++	if (ah->cc.cycles < cc.cycles) {
++		clear = true;
++		goto skip;
++	}
++
++	ah->cc.rx_clear = REG_READ(ah, AR_RCCNT);
++	ah->cc.rx_frame = REG_READ(ah, AR_RFCNT);
++	ah->cc.tx_frame = REG_READ(ah, AR_TFCNT);
++
++	/* prevent wraparound */
++	if (ah->cc.cycles & BIT(31))
++		clear = true;
++
++#define CC_DELTA(_field, _reg) ah->cc_delta._field += ah->cc._field - cc._field
++	CC_DELTA(cycles, AR_CCCNT);
++	CC_DELTA(rx_frame, AR_RFCNT);
++	CC_DELTA(rx_clear, AR_RCCNT);
++	CC_DELTA(tx_frame, AR_TFCNT);
++#undef CC_DELTA
++
++	ah->listen_time += (ah->cc.cycles - cc.cycles) -
++		 ((ah->cc.rx_frame - cc.rx_frame) +
++		  (ah->cc.tx_frame - cc.tx_frame));
++
++skip:
++	if (clear) {
++		REG_WRITE(ah, AR_CCCNT, 0);
++		REG_WRITE(ah, AR_RFCNT, 0);
++		REG_WRITE(ah, AR_RCCNT, 0);
++		REG_WRITE(ah, AR_TFCNT, 0);
++		memset(&ah->cc, 0, sizeof(ah->cc));
++	}
+ 
+-	return good;
++	/* unfreeze counters */
++	REG_WRITE(ah, AR_MIBC, 0);
+ }
+ 
+ /*
+--- a/drivers/net/wireless/ath/ath9k/ani.h
++++ b/drivers/net/wireless/ath/ath9k/ani.h
+@@ -93,6 +93,13 @@ struct ath9k_mib_stats {
+ 	u32 beacons;
+ };
+ 
++struct ath_cycle_counters {
++	u32 cycles;
++	u32 rx_frame;
++	u32 rx_clear;
++	u32 tx_frame;
++};
++
+ /* INI default values for ANI registers */
+ struct ath9k_ani_default {
+ 	u16 m1ThreshLow;
+@@ -130,9 +137,6 @@ struct ar5416AniState {
+ 	int32_t rssiThrLow;
+ 	int32_t rssiThrHigh;
+ 	u32 noiseFloor;
+-	u32 txFrameCount;
+-	u32 rxFrameCount;
+-	u32 cycleCount;
+ 	u32 ofdmPhyErrCount;
+ 	u32 cckPhyErrCount;
+ 	u32 ofdmPhyErrBase;
+@@ -166,8 +170,7 @@ struct ar5416Stats {
+ 
+ void ath9k_enable_mib_counters(struct ath_hw *ah);
+ void ath9k_hw_disable_mib_counters(struct ath_hw *ah);
+-u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah, u32 *rxc_pcnt,
+-				  u32 *rxf_pcnt, u32 *txf_pcnt);
++void ath9k_hw_update_cycle_counters(struct ath_hw *ah);
+ void ath9k_hw_ani_setup(struct ath_hw *ah);
+ void ath9k_hw_ani_init(struct ath_hw *ah);
+ int ath9k_hw_get_ani_channel_idx(struct ath_hw *ah,
+--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+@@ -1227,8 +1227,7 @@ static bool ar5008_hw_ani_control_old(st
+ 		  aniState->firstepLevel,
+ 		  aniState->listenTime);
+ 	ath_print(common, ATH_DBG_ANI,
+-		"cycleCount=%d, ofdmPhyErrCount=%d, cckPhyErrCount=%d\n\n",
+-		aniState->cycleCount,
++		"ofdmPhyErrCount=%d, cckPhyErrCount=%d\n\n",
+ 		aniState->ofdmPhyErrCount,
+ 		aniState->cckPhyErrCount);
+ 
+@@ -1480,15 +1479,13 @@ static bool ar5008_hw_ani_control_new(st
+ 
+ 	ath_print(common, ATH_DBG_ANI,
+ 		  "ANI parameters: SI=%d, ofdmWS=%s FS=%d "
+-		  "MRCcck=%s listenTime=%d CC=%d listen=%d "
++		  "MRCcck=%s listenTime=%d "
+ 		  "ofdmErrs=%d cckErrs=%d\n",
+ 		  aniState->spurImmunityLevel,
+ 		  !aniState->ofdmWeakSigDetectOff ? "on" : "off",
+ 		  aniState->firstepLevel,
+ 		  !aniState->mrcCCKOff ? "on" : "off",
+ 		  aniState->listenTime,
+-		  aniState->cycleCount,
+-		  aniState->listenTime,
+ 		  aniState->ofdmPhyErrCount,
+ 		  aniState->cckPhyErrCount);
+ 	return true;
+@@ -1581,8 +1578,6 @@ static void ar5008_hw_ani_cache_ini_regs
+ 	aniState->firstepLevel = ATH9K_ANI_FIRSTEP_LVL_NEW;
+ 	aniState->ofdmWeakSigDetectOff = !ATH9K_ANI_USE_OFDM_WEAK_SIG;
+ 	aniState->mrcCCKOff = true; /* not available on pre AR9003 */
+-
+-	aniState->cycleCount = 0;
+ }
+ 
+ static void ar5008_hw_set_nf_limits(struct ath_hw *ah)
+--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+@@ -1005,15 +1005,13 @@ static bool ar9003_hw_ani_control(struct
+ 
+ 	ath_print(common, ATH_DBG_ANI,
+ 		  "ANI parameters: SI=%d, ofdmWS=%s FS=%d "
+-		  "MRCcck=%s listenTime=%d CC=%d listen=%d "
++		  "MRCcck=%s listenTime=%d "
+ 		  "ofdmErrs=%d cckErrs=%d\n",
+ 		  aniState->spurImmunityLevel,
+ 		  !aniState->ofdmWeakSigDetectOff ? "on" : "off",
+ 		  aniState->firstepLevel,
+ 		  !aniState->mrcCCKOff ? "on" : "off",
+ 		  aniState->listenTime,
+-		  aniState->cycleCount,
+-		  aniState->listenTime,
+ 		  aniState->ofdmPhyErrCount,
+ 		  aniState->cckPhyErrCount);
+ 	return true;
+@@ -1116,8 +1114,6 @@ static void ar9003_hw_ani_cache_ini_regs
+ 	aniState->firstepLevel = ATH9K_ANI_FIRSTEP_LVL_NEW;
+ 	aniState->ofdmWeakSigDetectOff = !ATH9K_ANI_USE_OFDM_WEAK_SIG;
+ 	aniState->mrcCCKOff = !ATH9K_ANI_ENABLE_MRC_CCK;
+-
+-	aniState->cycleCount = 0;
+ }
+ 
+ void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
+@@ -1232,7 +1228,7 @@ void ar9003_hw_bb_watchdog_read(struct a
+ void ar9003_hw_bb_watchdog_dbg_info(struct ath_hw *ah)
+ {
+ 	struct ath_common *common = ath9k_hw_common(ah);
+-	u32 rxc_pcnt = 0, rxf_pcnt = 0, txf_pcnt = 0, status;
++	u32 status;
+ 
+ 	if (likely(!(common->debug_mask & ATH_DBG_RESET)))
+ 		return;
+@@ -1261,11 +1257,13 @@ void ar9003_hw_bb_watchdog_dbg_info(stru
+ 		  "** BB mode: BB_gen_controls=0x%08x **\n",
+ 		  REG_READ(ah, AR_PHY_GEN_CTRL));
+ 
+-	if (ath9k_hw_GetMibCycleCountsPct(ah, &rxc_pcnt, &rxf_pcnt, &txf_pcnt))
++	ath9k_hw_update_cycle_counters(ah);
++#define PCT(_field) (ah->cc_delta._field * 100 / ah->cc_delta.cycles)
++	if (ah->cc_delta.cycles)
+ 		ath_print(common, ATH_DBG_RESET,
+ 			  "** BB busy times: rx_clear=%d%%, "
+ 			  "rx_frame=%d%%, tx_frame=%d%% **\n",
+-			  rxc_pcnt, rxf_pcnt, txf_pcnt);
++			  PCT(rx_clear), PCT(rx_frame), PCT(tx_frame));
+ 
+ 	ath_print(common, ATH_DBG_RESET,
+ 		  "==== BB update: done ====\n\n");
diff --git a/package/mac80211/patches/550-ath9k_cleanup_regwrite_buffer.patch b/package/mac80211/patches/550-ath9k_cleanup_regwrite_buffer.patch
new file mode 100644
index 000000000..a0ef55562
--- /dev/null
+++ b/package/mac80211/patches/550-ath9k_cleanup_regwrite_buffer.patch
@@ -0,0 +1,410 @@
+--- a/drivers/net/wireless/ath/ath.h
++++ b/drivers/net/wireless/ath/ath.h
+@@ -102,14 +102,12 @@ enum ath_cipher {
+  * @read: Register read
+  * @write: Register write
+  * @enable_write_buffer: Enable multiple register writes
+- * @disable_write_buffer: Disable multiple register writes
+- * @write_flush: Flush buffered register writes
++ * @write_flush: flush buffered register writes and disable buffering
+  */
+ struct ath_ops {
+ 	unsigned int (*read)(void *, u32 reg_offset);
+ 	void (*write)(void *, u32 val, u32 reg_offset);
+ 	void (*enable_write_buffer)(void *);
+-	void (*disable_write_buffer)(void *);
+ 	void (*write_flush) (void *);
+ };
+ 
+--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
++++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+@@ -380,15 +380,6 @@ static void ath9k_enable_regwrite_buffer
+ 	atomic_inc(&priv->wmi->mwrite_cnt);
+ }
+ 
+-static void ath9k_disable_regwrite_buffer(void *hw_priv)
+-{
+-	struct ath_hw *ah = (struct ath_hw *) hw_priv;
+-	struct ath_common *common = ath9k_hw_common(ah);
+-	struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) common->priv;
+-
+-	atomic_dec(&priv->wmi->mwrite_cnt);
+-}
+-
+ static void ath9k_regwrite_flush(void *hw_priv)
+ {
+ 	struct ath_hw *ah = (struct ath_hw *) hw_priv;
+@@ -397,6 +388,9 @@ static void ath9k_regwrite_flush(void *h
+ 	u32 rsp_status;
+ 	int r;
+ 
++	if (!atomic_dec_and_test(&priv->wmi->mwrite_cnt))
++		return;
++
+ 	mutex_lock(&priv->wmi->multi_write_mutex);
+ 
+ 	if (priv->wmi->multi_write_idx) {
+@@ -420,7 +414,6 @@ static const struct ath_ops ath9k_common
+ 	.read = ath9k_regread,
+ 	.write = ath9k_regwrite,
+ 	.enable_write_buffer = ath9k_enable_regwrite_buffer,
+-	.disable_write_buffer = ath9k_disable_regwrite_buffer,
+ 	.write_flush = ath9k_regwrite_flush,
+ };
+ 
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -70,19 +70,13 @@
+ 
+ #define ENABLE_REGWRITE_BUFFER(_ah)					\
+ 	do {								\
+-		if (AR_SREV_9271(_ah))					\
++		if (ath9k_hw_common(_ah)->ops->enable_write_buffer)	\
+ 			ath9k_hw_common(_ah)->ops->enable_write_buffer((_ah)); \
+ 	} while (0)
+ 
+-#define DISABLE_REGWRITE_BUFFER(_ah)					\
+-	do {								\
+-		if (AR_SREV_9271(_ah))					\
+-			ath9k_hw_common(_ah)->ops->disable_write_buffer((_ah)); \
+-	} while (0)
+-
+ #define REGWRITE_BUFFER_FLUSH(_ah)					\
+ 	do {								\
+-		if (AR_SREV_9271(_ah))					\
++		if (ath9k_hw_common(_ah)->ops->write_flush)		\
+ 			ath9k_hw_common(_ah)->ops->write_flush((_ah));	\
+ 	} while (0)
+ 
+--- a/drivers/net/wireless/ath/ath9k/ani.c
++++ b/drivers/net/wireless/ath/ath9k/ani.c
+@@ -180,7 +180,6 @@ static void ath9k_ani_restart_old(struct
+ 	REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
+ 
+@@ -215,7 +214,6 @@ static void ath9k_ani_restart_new(struct
+ 	REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
+ 
+@@ -643,7 +641,6 @@ static void ath9k_ani_reset_old(struct a
+ 	REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ /*
+@@ -737,7 +734,6 @@ static void ath9k_ani_reset_new(struct a
+ 	REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ static void ath9k_hw_ani_monitor_old(struct ath_hw *ah,
+@@ -991,7 +987,6 @@ void ath9k_enable_mib_counters(struct at
+ 	REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ /* Freeze the MIB counters, get the stats and then clear them */
+@@ -1261,7 +1256,6 @@ void ath9k_hw_ani_init(struct ath_hw *ah
+ 	REG_WRITE(ah, AR_PHY_ERR_2, ah->ani[0].cckPhyErrBase);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	ath9k_enable_mib_counters(ah);
+ 
+--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+@@ -615,14 +615,11 @@ static void ar5008_hw_init_chain_masks(s
+ 	rx_chainmask = ah->rxchainmask;
+ 	tx_chainmask = ah->txchainmask;
+ 
+-	ENABLE_REGWRITE_BUFFER(ah);
+ 
+ 	switch (rx_chainmask) {
+ 	case 0x5:
+-		DISABLE_REGWRITE_BUFFER(ah);
+ 		REG_SET_BIT(ah, AR_PHY_ANALOG_SWAP,
+ 			    AR_PHY_SWAP_ALT_CHAIN);
+-		ENABLE_REGWRITE_BUFFER(ah);
+ 	case 0x3:
+ 		if (ah->hw_version.macVersion == AR_SREV_REVISION_5416_10) {
+ 			REG_WRITE(ah, AR_PHY_RX_CHAINMASK, 0x7);
+@@ -632,17 +629,18 @@ static void ar5008_hw_init_chain_masks(s
+ 	case 0x1:
+ 	case 0x2:
+ 	case 0x7:
++		ENABLE_REGWRITE_BUFFER(ah);
+ 		REG_WRITE(ah, AR_PHY_RX_CHAINMASK, rx_chainmask);
+ 		REG_WRITE(ah, AR_PHY_CAL_CHAINMASK, rx_chainmask);
+ 		break;
+ 	default:
++		ENABLE_REGWRITE_BUFFER(ah);
+ 		break;
+ 	}
+ 
+ 	REG_WRITE(ah, AR_SELFGEN_MASK, tx_chainmask);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (tx_chainmask == 0x5) {
+ 		REG_SET_BIT(ah, AR_PHY_ANALOG_SWAP,
+@@ -728,7 +726,6 @@ static void ar5008_hw_set_channel_regs(s
+ 	REG_WRITE(ah, AR_CST, 0xF << AR_CST_TIMEOUT_LIMIT_S);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ 
+@@ -820,7 +817,6 @@ static int ar5008_hw_process_ini(struct 
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (AR_SREV_9280(ah) || AR_SREV_9287_11_OR_LATER(ah))
+ 		REG_WRITE_ARRAY(&ah->iniModesRxGain, modesIndex, regWrites);
+@@ -851,7 +847,6 @@ static int ar5008_hw_process_ini(struct 
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (AR_SREV_9271(ah)) {
+ 		if (ah->eep_ops->get_eeprom(ah, EEP_TXGAIN_TYPE) == 1)
+--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+@@ -522,7 +522,6 @@ static void ar9271_hw_pa_cal(struct ath_
+ 		REG_WRITE(ah, regList[i][0], regList[i][1]);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ static inline void ar9285_hw_pa_cal(struct ath_hw *ah, bool is_reset)
+--- a/drivers/net/wireless/ath/ath9k/ar9002_hw.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_hw.c
+@@ -371,7 +371,6 @@ static void ar9002_hw_configpcipowersave
+ 			REG_WRITE(ah, AR_PCIE_SERDES2, 0x00000000);
+ 
+ 			REGWRITE_BUFFER_FLUSH(ah);
+-			DISABLE_REGWRITE_BUFFER(ah);
+ 		}
+ 
+ 		udelay(1000);
+@@ -468,7 +467,6 @@ static int ar9002_hw_get_radiorev(struct
+ 		REG_WRITE(ah, AR_PHY(0x20), 0x00010000);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	val = (REG_READ(ah, AR_PHY(256)) >> 24) & 0xff;
+ 	val = ((val & 0xf0) >> 4) | ((val & 0x0f) << 4);
+@@ -627,6 +625,4 @@ void ar9002_hw_load_ani_reg(struct ath_h
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+-
+ }
+--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+@@ -415,7 +415,6 @@ static void ar9002_hw_spur_mitigate(stru
+ 	REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ static void ar9002_olc_init(struct ath_hw *ah)
+--- a/drivers/net/wireless/ath/ath9k/calib.c
++++ b/drivers/net/wireless/ath/ath9k/calib.c
+@@ -300,7 +300,6 @@ void ath9k_hw_loadnf(struct ath_hw *ah, 
+ 		}
+ 	}
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ 
+--- a/drivers/net/wireless/ath/ath9k/eeprom_4k.c
++++ b/drivers/net/wireless/ath/ath9k/eeprom_4k.c
+@@ -500,7 +500,6 @@ static void ath9k_hw_set_4k_power_cal_ta
+ 			}
+ 
+ 			REGWRITE_BUFFER_FLUSH(ah);
+-			DISABLE_REGWRITE_BUFFER(ah);
+ 		}
+ 	}
+ 
+@@ -832,7 +831,6 @@ static void ath9k_hw_4k_set_txpower(stru
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ static void ath9k_hw_4k_set_addac(struct ath_hw *ah,
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -302,7 +302,6 @@ static void ath9k_hw_disablepcie(struct 
+ 	REG_WRITE(ah, AR_PCIE_SERDES2, 0x00000000);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ /* This should work for all families including legacy */
+@@ -688,7 +687,6 @@ static void ath9k_hw_init_qos(struct ath
+ 	REG_WRITE(ah, AR_TXOP_12_15, 0xFFFFFFFF);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ static void ath9k_hw_init_pll(struct ath_hw *ah,
+@@ -753,7 +751,6 @@ static void ath9k_hw_init_interrupt_mask
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (AR_SREV_9300_20_OR_LATER(ah)) {
+ 		REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, 0);
+@@ -897,7 +894,6 @@ static inline void ath9k_hw_set_dma(stru
+ 	REG_WRITE(ah, AR_TXCFG, regval | AR_TXCFG_DMASZ_128B);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	/*
+ 	 * Restore TX Trigger Level to its pre-reset value.
+@@ -945,7 +941,6 @@ static inline void ath9k_hw_set_dma(stru
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (AR_SREV_9300_20_OR_LATER(ah))
+ 		ath9k_hw_reset_txstatus_ring(ah);
+@@ -1043,7 +1038,6 @@ static bool ath9k_hw_set_reset(struct at
+ 	REG_WRITE(ah, AR_RTC_RC, rst_flags);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	udelay(50);
+ 
+@@ -1082,7 +1076,6 @@ static bool ath9k_hw_set_reset_power_on(
+ 	udelay(2);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (!AR_SREV_9300_20_OR_LATER(ah))
+ 		udelay(2);
+@@ -1386,7 +1379,6 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ 	REG_WRITE(ah, AR_RSSI_THR, INIT_RSSI_THR);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	r = ath9k_hw_rf_set_freq(ah, chan);
+ 	if (r)
+@@ -1398,7 +1390,6 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ 		REG_WRITE(ah, AR_DQCUMASK(i), 1 << i);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	ah->intr_txqs = 0;
+ 	for (i = 0; i < ah->caps.total_queues; i++)
+@@ -1446,7 +1437,6 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ 	REG_WRITE(ah, AR_CFG_LED, saveLedState | AR_CFG_SCLK_32KHZ);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	/*
+ 	 * For big endian systems turn on swapping for descriptors
+@@ -1696,7 +1686,6 @@ void ath9k_hw_beaconinit(struct ath_hw *
+ 	REG_WRITE(ah, AR_NDP_PERIOD, TU_TO_USEC(beacon_period));
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	beacon_period &= ~ATH9K_BEACON_ENA;
+ 	if (beacon_period & ATH9K_BEACON_RESET_TSF) {
+@@ -1724,7 +1713,6 @@ void ath9k_hw_set_sta_beacon_timers(stru
+ 		  TU_TO_USEC(bs->bs_intval & ATH9K_BEACON_PERIOD));
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	REG_RMW_FIELD(ah, AR_RSSI_THR,
+ 		      AR_RSSI_THR_BM_THR, bs->bs_bmissthreshold);
+@@ -1770,7 +1758,6 @@ void ath9k_hw_set_sta_beacon_timers(stru
+ 	REG_WRITE(ah, AR_DTIM_PERIOD, TU_TO_USEC(dtimperiod));
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	REG_SET_BIT(ah, AR_TIMER_MODE,
+ 		    AR_TBTT_TIMER_EN | AR_TIM_TIMER_EN |
+@@ -2188,7 +2175,6 @@ void ath9k_hw_setrxfilter(struct ath_hw 
+ 			  REG_READ(ah, AR_RXCFG) & ~AR_RXCFG_ZLFDMA);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ EXPORT_SYMBOL(ath9k_hw_setrxfilter);
+ 
+--- a/drivers/net/wireless/ath/ath9k/mac.c
++++ b/drivers/net/wireless/ath/ath9k/mac.c
+@@ -40,7 +40,6 @@ static void ath9k_hw_set_txq_interrupts(
+ 	REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ }
+ 
+ u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q)
+@@ -530,7 +529,6 @@ bool ath9k_hw_resettxqueue(struct ath_hw
+ 	}
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+-	DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 	if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE) {
+ 		REG_WRITE(ah, AR_DMISC(q),
+@@ -553,7 +551,6 @@ bool ath9k_hw_resettxqueue(struct ath_hw
+ 			  | AR_D_MISC_POST_FR_BKOFF_DIS);
+ 
+ 		REGWRITE_BUFFER_FLUSH(ah);
+-		DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 		/*
+ 		 * cwmin and cwmax should be 0 for beacon queue
+@@ -585,7 +582,6 @@ bool ath9k_hw_resettxqueue(struct ath_hw
+ 			     AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
+ 
+ 		REGWRITE_BUFFER_FLUSH(ah);
+-		DISABLE_REGWRITE_BUFFER(ah);
+ 
+ 		break;
+ 	case ATH9K_TX_QUEUE_PSPOLL:
diff --git a/package/mac80211/patches/551-ath9k_ani_helper.patch b/package/mac80211/patches/551-ath9k_ani_helper.patch
new file mode 100644
index 000000000..dfd85f237
--- /dev/null
+++ b/package/mac80211/patches/551-ath9k_ani_helper.patch
@@ -0,0 +1,32 @@
+--- a/drivers/net/wireless/ath/ath9k/ani.c
++++ b/drivers/net/wireless/ath/ath9k/ani.c
+@@ -109,6 +109,11 @@ static void ath9k_hw_ani_lower_immunity(
+ 	ath9k_hw_private_ops(ah)->ani_lower_immunity(ah);
+ }
+ 
++static bool use_new_ani(struct ath_hw *ah)
++{
++	return AR_SREV_9300_20_OR_LATER(ah) || modparam_force_new_ani;
++}
++
+ int ath9k_hw_get_ani_channel_idx(struct ath_hw *ah,
+ 				 struct ath9k_channel *chan)
+ {
+@@ -1178,7 +1183,7 @@ void ath9k_hw_ani_init(struct ath_hw *ah
+ 
+ 	memset(ah->ani, 0, sizeof(ah->ani));
+ 	for (i = 0; i < ARRAY_SIZE(ah->ani); i++) {
+-		if (AR_SREV_9300_20_OR_LATER(ah) || modparam_force_new_ani) {
++		if (use_new_ani(ah)) {
+ 			ah->ani[i].ofdmTrigHigh = ATH9K_ANI_OFDM_TRIG_HIGH_NEW;
+ 			ah->ani[i].ofdmTrigLow = ATH9K_ANI_OFDM_TRIG_LOW_NEW;
+ 
+@@ -1230,7 +1235,7 @@ void ath9k_hw_ani_init(struct ath_hw *ah
+ 	 * since we expect some ongoing maintenance on the tables, let's sanity
+ 	 * check here default level should not modify INI setting.
+ 	 */
+-	if (AR_SREV_9300_20_OR_LATER(ah) || modparam_force_new_ani) {
++	if (use_new_ani(ah)) {
+ 		const struct ani_ofdm_level_entry *entry_ofdm;
+ 		const struct ani_cck_level_entry *entry_cck;
+ 
diff --git a/package/mac80211/patches/552-ath9k_fix_ani_listen_time.patch b/package/mac80211/patches/552-ath9k_fix_ani_listen_time.patch
new file mode 100644
index 000000000..9d83a0226
--- /dev/null
+++ b/package/mac80211/patches/552-ath9k_fix_ani_listen_time.patch
@@ -0,0 +1,11 @@
+--- a/drivers/net/wireless/ath/ath9k/ani.c
++++ b/drivers/net/wireless/ath/ath9k/ani.c
+@@ -547,7 +547,7 @@ static u8 ath9k_hw_chan_2_clockrate_mhz(
+ 	if (conf_is_ht40(conf))
+ 		return clockrate * 2;
+ 
+-	return clockrate * 2;
++	return clockrate;
+ }
+ 
+ static int32_t ath9k_hw_ani_get_listen_time(struct ath_hw *ah)