1 files changed, 292 insertions, 285 deletions

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index b04b37b1124..275205ab5f1 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008-2009 Atheros Communications Inc.
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -16,15 +16,16 @@
 
 #include "hw.h"
 #include "hw-ops.h"
+#include <linux/export.h>
 
 static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
 					struct ath9k_tx_queue_info *qi)
 {
-	ath_print(ath9k_hw_common(ah), ATH_DBG_INTERRUPT,
-		  "tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
-		  ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
-		  ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
-		  ah->txurn_interrupt_mask);
+	ath_dbg(ath9k_hw_common(ah), INTERRUPT,
+		"tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
+		ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
+		ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
+		ah->txurn_interrupt_mask);
 
 	ENABLE_REGWRITE_BUFFER(ah);
 
@@ -56,24 +57,11 @@ EXPORT_SYMBOL(ath9k_hw_puttxbuf);
 
 void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
 {
-	ath_print(ath9k_hw_common(ah), ATH_DBG_QUEUE,
-		  "Enable TXE on queue: %u\n", q);
+	ath_dbg(ath9k_hw_common(ah), QUEUE, "Enable TXE on queue: %u\n", q);
 	REG_WRITE(ah, AR_Q_TXE, 1 << q);
 }
 EXPORT_SYMBOL(ath9k_hw_txstart);
 
-void ath9k_hw_cleartxdesc(struct ath_hw *ah, void *ds)
-{
-	struct ar5416_desc *ads = AR5416DESC(ds);
-
-	ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
-	ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
-	ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
-	ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
-	ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
-}
-EXPORT_SYMBOL(ath9k_hw_cleartxdesc);
-
 u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
 {
 	u32 npend;
@@ -143,115 +131,83 @@ bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel)
 }
 EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
 
-bool ath9k_hw_stoptxdma(struct ath_hw *ah, u32 q)
+void ath9k_hw_abort_tx_dma(struct ath_hw *ah)
 {
-#define ATH9K_TX_STOP_DMA_TIMEOUT	4000    /* usec */
-#define ATH9K_TIME_QUANTUM		100     /* usec */
-	struct ath_common *common = ath9k_hw_common(ah);
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
-	struct ath9k_tx_queue_info *qi;
-	u32 tsfLow, j, wait;
-	u32 wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
+	int maxdelay = 1000;
+	int i, q;
 
-	if (q >= pCap->total_queues) {
-		ath_print(common, ATH_DBG_QUEUE, "Stopping TX DMA, "
-			  "invalid queue: %u\n", q);
-		return false;
+	if (ah->curchan) {
+		if (IS_CHAN_HALF_RATE(ah->curchan))
+			maxdelay *= 2;
+		else if (IS_CHAN_QUARTER_RATE(ah->curchan))
+			maxdelay *= 4;
 	}
 
-	qi = &ah->txq[q];
-	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_QUEUE, "Stopping TX DMA, "
-			  "inactive queue: %u\n", q);
-		return false;
-	}
+	REG_WRITE(ah, AR_Q_TXD, AR_Q_TXD_M);
 
-	REG_WRITE(ah, AR_Q_TXD, 1 << q);
+	REG_SET_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+	REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+	REG_SET_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
 
-	for (wait = wait_time; wait != 0; wait--) {
-		if (ath9k_hw_numtxpending(ah, q) == 0)
-			break;
-		udelay(ATH9K_TIME_QUANTUM);
-	}
+	for (q = 0; q < AR_NUM_QCU; q++) {
+		for (i = 0; i < maxdelay; i++) {
+			if (i)
+				udelay(5);
 
-	if (ath9k_hw_numtxpending(ah, q)) {
-		ath_print(common, ATH_DBG_QUEUE,
-			  "%s: Num of pending TX Frames %d on Q %d\n",
-			  __func__, ath9k_hw_numtxpending(ah, q), q);
-
-		for (j = 0; j < 2; j++) {
-			tsfLow = REG_READ(ah, AR_TSF_L32);
-			REG_WRITE(ah, AR_QUIET2,
-				  SM(10, AR_QUIET2_QUIET_DUR));
-			REG_WRITE(ah, AR_QUIET_PERIOD, 100);
-			REG_WRITE(ah, AR_NEXT_QUIET_TIMER, tsfLow >> 10);
-			REG_SET_BIT(ah, AR_TIMER_MODE,
-				       AR_QUIET_TIMER_EN);
-
-			if ((REG_READ(ah, AR_TSF_L32) >> 10) == (tsfLow >> 10))
+			if (!ath9k_hw_numtxpending(ah, q))
 				break;
-
-			ath_print(common, ATH_DBG_QUEUE,
-				  "TSF has moved while trying to set "
-				  "quiet time TSF: 0x%08x\n", tsfLow);
 		}
+	}
 
-		REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+	REG_CLR_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
+	REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+	REG_CLR_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
 
-		udelay(200);
-		REG_CLR_BIT(ah, AR_TIMER_MODE, AR_QUIET_TIMER_EN);
+	REG_WRITE(ah, AR_Q_TXD, 0);
+}
+EXPORT_SYMBOL(ath9k_hw_abort_tx_dma);
 
-		wait = wait_time;
-		while (ath9k_hw_numtxpending(ah, q)) {
-			if ((--wait) == 0) {
-				ath_print(common, ATH_DBG_FATAL,
-					  "Failed to stop TX DMA in 100 "
-					  "msec after killing last frame\n");
-				break;
-			}
+bool ath9k_hw_stop_dma_queue(struct ath_hw *ah, u32 q)
+{
+#define ATH9K_TX_STOP_DMA_TIMEOUT	1000    /* usec */
+#define ATH9K_TIME_QUANTUM		100     /* usec */
+	int wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
+	int wait;
+
+	REG_WRITE(ah, AR_Q_TXD, 1 << q);
+
+	for (wait = wait_time; wait != 0; wait--) {
+		if (wait != wait_time)
 			udelay(ATH9K_TIME_QUANTUM);
-		}
 
-		REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
+		if (ath9k_hw_numtxpending(ah, q) == 0)
+			break;
 	}
 
 	REG_WRITE(ah, AR_Q_TXD, 0);
+
 	return wait != 0;
 
 #undef ATH9K_TX_STOP_DMA_TIMEOUT
 #undef ATH9K_TIME_QUANTUM
 }
-EXPORT_SYMBOL(ath9k_hw_stoptxdma);
-
-void ath9k_hw_gettxintrtxqs(struct ath_hw *ah, u32 *txqs)
-{
-	*txqs &= ah->intr_txqs;
-	ah->intr_txqs &= ~(*txqs);
-}
-EXPORT_SYMBOL(ath9k_hw_gettxintrtxqs);
+EXPORT_SYMBOL(ath9k_hw_stop_dma_queue);
 
 bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
 			    const struct ath9k_tx_queue_info *qinfo)
 {
 	u32 cw;
 	struct ath_common *common = ath9k_hw_common(ah);
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath9k_tx_queue_info *qi;
 
-	if (q >= pCap->total_queues) {
-		ath_print(common, ATH_DBG_QUEUE, "Set TXQ properties, "
-			  "invalid queue: %u\n", q);
-		return false;
-	}
-
 	qi = &ah->txq[q];
 	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_QUEUE, "Set TXQ properties, "
-			  "inactive queue: %u\n", q);
+		ath_dbg(common, QUEUE,
+			"Set TXQ properties, inactive queue: %u\n", q);
 		return false;
 	}
 
-	ath_print(common, ATH_DBG_QUEUE, "Set queue properties for: %u\n", q);
+	ath_dbg(common, QUEUE, "Set queue properties for: %u\n", q);
 
 	qi->tqi_ver = qinfo->tqi_ver;
 	qi->tqi_subtype = qinfo->tqi_subtype;
@@ -306,19 +262,12 @@ bool ath9k_hw_get_txq_props(struct ath_hw *ah, int q,
 			    struct ath9k_tx_queue_info *qinfo)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath9k_tx_queue_info *qi;
 
-	if (q >= pCap->total_queues) {
-		ath_print(common, ATH_DBG_QUEUE, "Get TXQ properties, "
-			  "invalid queue: %u\n", q);
-		return false;
-	}
-
 	qi = &ah->txq[q];
 	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_QUEUE, "Get TXQ properties, "
-			  "inactive queue: %u\n", q);
+		ath_dbg(common, QUEUE,
+			"Get TXQ properties, inactive queue: %u\n", q);
 		return false;
 	}
 
@@ -346,95 +295,76 @@ int ath9k_hw_setuptxqueue(struct ath_hw *ah, enum ath9k_tx_queue type,
 {
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath9k_tx_queue_info *qi;
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	int q;
 
 	switch (type) {
 	case ATH9K_TX_QUEUE_BEACON:
-		q = pCap->total_queues - 1;
+		q = ATH9K_NUM_TX_QUEUES - 1;
 		break;
 	case ATH9K_TX_QUEUE_CAB:
-		q = pCap->total_queues - 2;
+		q = ATH9K_NUM_TX_QUEUES - 2;
 		break;
 	case ATH9K_TX_QUEUE_PSPOLL:
 		q = 1;
 		break;
 	case ATH9K_TX_QUEUE_UAPSD:
-		q = pCap->total_queues - 3;
+		q = ATH9K_NUM_TX_QUEUES - 3;
 		break;
 	case ATH9K_TX_QUEUE_DATA:
-		for (q = 0; q < pCap->total_queues; q++)
+		for (q = 0; q < ATH9K_NUM_TX_QUEUES; q++)
 			if (ah->txq[q].tqi_type ==
 			    ATH9K_TX_QUEUE_INACTIVE)
 				break;
-		if (q == pCap->total_queues) {
-			ath_print(common, ATH_DBG_FATAL,
-				  "No available TX queue\n");
+		if (q == ATH9K_NUM_TX_QUEUES) {
+			ath_err(common, "No available TX queue\n");
 			return -1;
 		}
 		break;
 	default:
-		ath_print(common, ATH_DBG_FATAL,
-			  "Invalid TX queue type: %u\n", type);
+		ath_err(common, "Invalid TX queue type: %u\n", type);
 		return -1;
 	}
 
-	ath_print(common, ATH_DBG_QUEUE, "Setup TX queue: %u\n", q);
+	ath_dbg(common, QUEUE, "Setup TX queue: %u\n", q);
 
 	qi = &ah->txq[q];
 	if (qi->tqi_type != ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_FATAL,
-			  "TX queue: %u already active\n", q);
+		ath_err(common, "TX queue: %u already active\n", q);
 		return -1;
 	}
 	memset(qi, 0, sizeof(struct ath9k_tx_queue_info));
 	qi->tqi_type = type;
-	if (qinfo == NULL) {
-		qi->tqi_qflags =
-			TXQ_FLAG_TXOKINT_ENABLE
-			| TXQ_FLAG_TXERRINT_ENABLE
-			| TXQ_FLAG_TXDESCINT_ENABLE | TXQ_FLAG_TXURNINT_ENABLE;
-		qi->tqi_aifs = INIT_AIFS;
-		qi->tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
-		qi->tqi_cwmax = INIT_CWMAX;
-		qi->tqi_shretry = INIT_SH_RETRY;
-		qi->tqi_lgretry = INIT_LG_RETRY;
-		qi->tqi_physCompBuf = 0;
-	} else {
-		qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
-		(void) ath9k_hw_set_txq_props(ah, q, qinfo);
-	}
+	qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
+	(void) ath9k_hw_set_txq_props(ah, q, qinfo);
 
 	return q;
 }
 EXPORT_SYMBOL(ath9k_hw_setuptxqueue);
 
+static void ath9k_hw_clear_queue_interrupts(struct ath_hw *ah, u32 q)
+{
+	ah->txok_interrupt_mask &= ~(1 << q);
+	ah->txerr_interrupt_mask &= ~(1 << q);
+	ah->txdesc_interrupt_mask &= ~(1 << q);
+	ah->txeol_interrupt_mask &= ~(1 << q);
+	ah->txurn_interrupt_mask &= ~(1 << q);
+}
+
 bool ath9k_hw_releasetxqueue(struct ath_hw *ah, u32 q)
 {
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath9k_tx_queue_info *qi;
 
-	if (q >= pCap->total_queues) {
-		ath_print(common, ATH_DBG_QUEUE, "Release TXQ, "
-			  "invalid queue: %u\n", q);
-		return false;
-	}
 	qi = &ah->txq[q];
 	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_QUEUE, "Release TXQ, "
-			  "inactive queue: %u\n", q);
+		ath_dbg(common, QUEUE, "Release TXQ, inactive queue: %u\n", q);
 		return false;
 	}
 
-	ath_print(common, ATH_DBG_QUEUE, "Release TX queue: %u\n", q);
+	ath_dbg(common, QUEUE, "Release TX queue: %u\n", q);
 
 	qi->tqi_type = ATH9K_TX_QUEUE_INACTIVE;
-	ah->txok_interrupt_mask &= ~(1 << q);
-	ah->txerr_interrupt_mask &= ~(1 << q);
-	ah->txdesc_interrupt_mask &= ~(1 << q);
-	ah->txeol_interrupt_mask &= ~(1 << q);
-	ah->txurn_interrupt_mask &= ~(1 << q);
+	ath9k_hw_clear_queue_interrupts(ah, q);
 	ath9k_hw_set_txq_interrupts(ah, qi);
 
 	return true;
@@ -443,32 +373,20 @@ EXPORT_SYMBOL(ath9k_hw_releasetxqueue);
 
 bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 {
-	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath_common *common = ath9k_hw_common(ah);
-	struct ath9k_channel *chan = ah->curchan;
 	struct ath9k_tx_queue_info *qi;
 	u32 cwMin, chanCwMin, value;
 
-	if (q >= pCap->total_queues) {
-		ath_print(common, ATH_DBG_QUEUE, "Reset TXQ, "
-			  "invalid queue: %u\n", q);
-		return false;
-	}
-
 	qi = &ah->txq[q];
 	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
-		ath_print(common, ATH_DBG_QUEUE, "Reset TXQ, "
-			  "inactive queue: %u\n", q);
+		ath_dbg(common, QUEUE, "Reset TXQ, inactive queue: %u\n", q);
 		return true;
 	}
 
-	ath_print(common, ATH_DBG_QUEUE, "Reset TX queue: %u\n", q);
+	ath_dbg(common, QUEUE, "Reset TX queue: %u\n", q);
 
 	if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
-		if (chan && IS_CHAN_B(chan))
-			chanCwMin = INIT_CWMIN_11B;
-		else
-			chanCwMin = INIT_CWMIN;
+		chanCwMin = INIT_CWMIN;
 
 		for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1);
 	} else
@@ -487,17 +405,21 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 		  SM(qi->tqi_shretry, AR_D_RETRY_LIMIT_FR_SH));
 
 	REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
-	REG_WRITE(ah, AR_DMISC(q),
-		  AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
+
+	if (AR_SREV_9340(ah) && !AR_SREV_9340_13_OR_LATER(ah))
+		REG_WRITE(ah, AR_DMISC(q),
+			  AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x1);
+	else
+		REG_WRITE(ah, AR_DMISC(q),
+			  AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
 
 	if (qi->tqi_cbrPeriod) {
 		REG_WRITE(ah, AR_QCBRCFG(q),
 			  SM(qi->tqi_cbrPeriod, AR_Q_CBRCFG_INTERVAL) |
 			  SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_OVF_THRESH));
-		REG_WRITE(ah, AR_QMISC(q),
-			  REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_FSP_CBR |
-			  (qi->tqi_cbrOverflowLimit ?
-			   AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
+		REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_FSP_CBR |
+			    (qi->tqi_cbrOverflowLimit ?
+			     AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
 	}
 	if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
 		REG_WRITE(ah, AR_QRDYTIMECFG(q),
@@ -510,40 +432,31 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 		  (qi->tqi_burstTime ? AR_D_CHNTIME_EN : 0));
 
 	if (qi->tqi_burstTime
-	    && (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)) {
-		REG_WRITE(ah, AR_QMISC(q),
-			  REG_READ(ah, AR_QMISC(q)) |
-			  AR_Q_MISC_RDYTIME_EXP_POLICY);
+	    && (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE))
+		REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_RDYTIME_EXP_POLICY);
 
-	}
-
-	if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE) {
-		REG_WRITE(ah, AR_DMISC(q),
-			  REG_READ(ah, AR_DMISC(q)) |
-			  AR_D_MISC_POST_FR_BKOFF_DIS);
-	}
+	if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE)
+		REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
 
 	REGWRITE_BUFFER_FLUSH(ah);
 
-	if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE) {
-		REG_WRITE(ah, AR_DMISC(q),
-			  REG_READ(ah, AR_DMISC(q)) |
-			  AR_D_MISC_FRAG_BKOFF_EN);
-	}
+	if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
+		REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_FRAG_BKOFF_EN);
+
 	switch (qi->tqi_type) {
 	case ATH9K_TX_QUEUE_BEACON:
 		ENABLE_REGWRITE_BUFFER(ah);
 
-		REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
-			  | AR_Q_MISC_FSP_DBA_GATED
-			  | AR_Q_MISC_BEACON_USE
-			  | AR_Q_MISC_CBR_INCR_DIS1);
+		REG_SET_BIT(ah, AR_QMISC(q),
+			    AR_Q_MISC_FSP_DBA_GATED
+			    | AR_Q_MISC_BEACON_USE
+			    | AR_Q_MISC_CBR_INCR_DIS1);
 
-		REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
-			  | (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
+		REG_SET_BIT(ah, AR_DMISC(q),
+			    (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
 			     AR_D_MISC_ARB_LOCKOUT_CNTRL_S)
-			  | AR_D_MISC_BEACON_USE
-			  | AR_D_MISC_POST_FR_BKOFF_DIS);
+			    | AR_D_MISC_BEACON_USE
+			    | AR_D_MISC_POST_FR_BKOFF_DIS);
 
 		REGWRITE_BUFFER_FLUSH(ah);
 
@@ -562,66 +475,53 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 	case ATH9K_TX_QUEUE_CAB:
 		ENABLE_REGWRITE_BUFFER(ah);
 
-		REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
-			  | AR_Q_MISC_FSP_DBA_GATED
-			  | AR_Q_MISC_CBR_INCR_DIS1
-			  | AR_Q_MISC_CBR_INCR_DIS0);
+		REG_SET_BIT(ah, AR_QMISC(q),
+			    AR_Q_MISC_FSP_DBA_GATED
+			    | AR_Q_MISC_CBR_INCR_DIS1
+			    | AR_Q_MISC_CBR_INCR_DIS0);
 		value = (qi->tqi_readyTime -
 			 (ah->config.sw_beacon_response_time -
-			  ah->config.dma_beacon_response_time) -
-			 ah->config.additional_swba_backoff) * 1024;
+			  ah->config.dma_beacon_response_time)) * 1024;
 		REG_WRITE(ah, AR_QRDYTIMECFG(q),
 			  value | AR_Q_RDYTIMECFG_EN);
-		REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
-			  | (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
+		REG_SET_BIT(ah, AR_DMISC(q),
+			    (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
 			     AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
 
 		REGWRITE_BUFFER_FLUSH(ah);
 
 		break;
 	case ATH9K_TX_QUEUE_PSPOLL:
-		REG_WRITE(ah, AR_QMISC(q),
-			  REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_CBR_INCR_DIS1);
+		REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_CBR_INCR_DIS1);
 		break;
 	case ATH9K_TX_QUEUE_UAPSD:
-		REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q)) |
-			  AR_D_MISC_POST_FR_BKOFF_DIS);
+		REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
 		break;
 	default:
 		break;
 	}
 
 	if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
-		REG_WRITE(ah, AR_DMISC(q),
-			  REG_READ(ah, AR_DMISC(q)) |
-			  SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
-			     AR_D_MISC_ARB_LOCKOUT_CNTRL) |
-			  AR_D_MISC_POST_FR_BKOFF_DIS);
+		REG_SET_BIT(ah, AR_DMISC(q),
+			    SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
+			       AR_D_MISC_ARB_LOCKOUT_CNTRL) |
+			    AR_D_MISC_POST_FR_BKOFF_DIS);
 	}
 
 	if (AR_SREV_9300_20_OR_LATER(ah))
 		REG_WRITE(ah, AR_Q_DESC_CRCCHK, AR_Q_DESC_CRCCHK_EN);
 
-	if (qi->tqi_qflags & TXQ_FLAG_TXOKINT_ENABLE)
+	ath9k_hw_clear_queue_interrupts(ah, q);
+	if (qi->tqi_qflags & TXQ_FLAG_TXINT_ENABLE) {
 		ah->txok_interrupt_mask |= 1 << q;
-	else
-		ah->txok_interrupt_mask &= ~(1 << q);
-	if (qi->tqi_qflags & TXQ_FLAG_TXERRINT_ENABLE)
 		ah->txerr_interrupt_mask |= 1 << q;
-	else
-		ah->txerr_interrupt_mask &= ~(1 << q);
+	}
 	if (qi->tqi_qflags & TXQ_FLAG_TXDESCINT_ENABLE)
 		ah->txdesc_interrupt_mask |= 1 << q;
-	else
-		ah->txdesc_interrupt_mask &= ~(1 << q);
 	if (qi->tqi_qflags & TXQ_FLAG_TXEOLINT_ENABLE)
 		ah->txeol_interrupt_mask |= 1 << q;
-	else
-		ah->txeol_interrupt_mask &= ~(1 << q);
 	if (qi->tqi_qflags & TXQ_FLAG_TXURNINT_ENABLE)
 		ah->txurn_interrupt_mask |= 1 << q;
-	else
-		ah->txurn_interrupt_mask &= ~(1 << q);
 	ath9k_hw_set_txq_interrupts(ah, qi);
 
 	return true;
@@ -629,7 +529,7 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 EXPORT_SYMBOL(ath9k_hw_resettxqueue);
 
 int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
-			struct ath_rx_status *rs, u64 tsf)
+			struct ath_rx_status *rs)
 {
 	struct ar5416_desc ads;
 	struct ar5416_desc *adsp = AR5416DESC(ds);
@@ -642,31 +542,32 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
 
 	rs->rs_status = 0;
 	rs->rs_flags = 0;
+	rs->flag = 0;
 
 	rs->rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
 	rs->rs_tstamp = ads.AR_RcvTimestamp;
 
 	if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
 		rs->rs_rssi = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
-		rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
+		rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
 	} else {
 		rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
-		rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt00);
-		rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt01);
-		rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
+		rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
 						AR_RxRSSIAnt02);
-		rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt10);
-		rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt11);
-		rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
+		rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
 						AR_RxRSSIAnt12);
 	}
 	if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
@@ -674,17 +575,24 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
 	else
 		rs->rs_keyix = ATH9K_RXKEYIX_INVALID;
 
-	rs->rs_rate = RXSTATUS_RATE(ah, (&ads));
+	rs->rs_rate = MS(ads.ds_rxstatus0, AR_RxRate);
 	rs->rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
 
+	rs->rs_firstaggr = (ads.ds_rxstatus8 & AR_RxFirstAggr) ? 1 : 0;
 	rs->rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
-	rs->rs_moreaggr =
-		(ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
+	rs->rs_moreaggr = (ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
 	rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
-	rs->rs_flags =
-		(ads.ds_rxstatus3 & AR_GI) ? ATH9K_RX_GI : 0;
-	rs->rs_flags |=
-		(ads.ds_rxstatus3 & AR_2040) ? ATH9K_RX_2040 : 0;
+
+	/* directly mapped flags for ieee80211_rx_status */
+	rs->flag |=
+		(ads.ds_rxstatus3 & AR_GI) ? RX_FLAG_SHORT_GI : 0;
+	rs->flag |=
+		(ads.ds_rxstatus3 & AR_2040) ? RX_FLAG_40MHZ : 0;
+	if (AR_SREV_9280_20_OR_LATER(ah))
+		rs->flag |=
+			(ads.ds_rxstatus3 & AR_STBC) ?
+				/* we can only Nss=1 STBC */
+				(1 << RX_FLAG_STBC_SHIFT) : 0;
 
 	if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
 		rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
@@ -694,21 +602,35 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
 		rs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
 
 	if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
-		if (ads.ds_rxstatus8 & AR_CRCErr)
-			rs->rs_status |= ATH9K_RXERR_CRC;
-		else if (ads.ds_rxstatus8 & AR_PHYErr) {
+		/*
+		 * Treat these errors as mutually exclusive to avoid spurious
+		 * extra error reports from the hardware. If a CRC error is
+		 * reported, then decryption and MIC errors are irrelevant,
+		 * the frame is going to be dropped either way
+		 */
+		if (ads.ds_rxstatus8 & AR_PHYErr) {
 			rs->rs_status |= ATH9K_RXERR_PHY;
 			phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
 			rs->rs_phyerr = phyerr;
-		} else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
+		} else if (ads.ds_rxstatus8 & AR_CRCErr)
+			rs->rs_status |= ATH9K_RXERR_CRC;
+		else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
 			rs->rs_status |= ATH9K_RXERR_DECRYPT;
-		else if ((ads.ds_rxstatus8 & AR_MichaelErr) &&
-		         rs->rs_keyix != ATH9K_RXKEYIX_INVALID)
+		else if (ads.ds_rxstatus8 & AR_MichaelErr)
 			rs->rs_status |= ATH9K_RXERR_MIC;
-		else if (ads.ds_rxstatus8 & AR_KeyMiss)
-			rs->rs_status |= ATH9K_RXERR_DECRYPT;
+	} else {
+		if (ads.ds_rxstatus8 &
+		    (AR_CRCErr | AR_PHYErr | AR_DecryptCRCErr | AR_MichaelErr))
+			rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
+
+		/* Only up to MCS16 supported, everything above is invalid */
+		if (rs->rs_rate >= 0x90)
+			rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
 	}
 
+	if (ads.ds_rxstatus8 & AR_KeyMiss)
+		rs->rs_status |= ATH9K_RXERR_KEYMISS;
+
 	return 0;
 }
 EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
@@ -735,9 +657,9 @@ bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)
 				     AR_DIAG_RX_ABORT));
 
 			reg = REG_READ(ah, AR_OBS_BUS_1);
-			ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
-				  "RX failed to go idle in 10 ms RXSM=0x%x\n",
-				  reg);
+			ath_err(ath9k_hw_common(ah),
+				"RX failed to go idle in 10 ms RXSM=0x%x\n",
+				reg);
 
 			return false;
 		}
@@ -774,35 +696,51 @@ void ath9k_hw_abortpcurecv(struct ath_hw *ah)
 }
 EXPORT_SYMBOL(ath9k_hw_abortpcurecv);
 
-bool ath9k_hw_stopdmarecv(struct ath_hw *ah)
+bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
 {
 #define AH_RX_STOP_DMA_TIMEOUT 10000   /* usec */
-#define AH_RX_TIME_QUANTUM     100     /* usec */
 	struct ath_common *common = ath9k_hw_common(ah);
+	u32 mac_status, last_mac_status = 0;
 	int i;
 
+	/* Enable access to the DMA observation bus */
+	REG_WRITE(ah, AR_MACMISC,
+		  ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
+		   (AR_MACMISC_MISC_OBS_BUS_1 <<
+		    AR_MACMISC_MISC_OBS_BUS_MSB_S)));
+
 	REG_WRITE(ah, AR_CR, AR_CR_RXD);
 
 	/* Wait for rx enable bit to go low */
 	for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
 		if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
 			break;
+
+		if (!AR_SREV_9300_20_OR_LATER(ah)) {
+			mac_status = REG_READ(ah, AR_DMADBG_7) & 0x7f0;
+			if (mac_status == 0x1c0 && mac_status == last_mac_status) {
+				*reset = true;
+				break;
+			}
+
+			last_mac_status = mac_status;
+		}
+
 		udelay(AH_TIME_QUANTUM);
 	}
 
 	if (i == 0) {
-		ath_print(common, ATH_DBG_FATAL,
-			  "DMA failed to stop in %d ms "
-			  "AR_CR=0x%08x AR_DIAG_SW=0x%08x\n",
-			  AH_RX_STOP_DMA_TIMEOUT / 1000,
-			  REG_READ(ah, AR_CR),
-			  REG_READ(ah, AR_DIAG_SW));
+		ath_err(common,
+			"DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
+			AH_RX_STOP_DMA_TIMEOUT / 1000,
+			REG_READ(ah, AR_CR),
+			REG_READ(ah, AR_DIAG_SW),
+			REG_READ(ah, AR_DMADBG_7));
 		return false;
 	} else {
 		return true;
 	}
 
-#undef AH_RX_TIME_QUANTUM
 #undef AH_RX_STOP_DMA_TIMEOUT
 }
 EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
@@ -815,7 +753,10 @@ int ath9k_hw_beaconq_setup(struct ath_hw *ah)
 	qi.tqi_aifs = 1;
 	qi.tqi_cwmin = 0;
 	qi.tqi_cwmax = 0;
-	/* NB: don't enable any interrupts */
+
+	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
+		qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE;
+
 	return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
 }
 EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
@@ -828,7 +769,10 @@ bool ath9k_hw_intrpend(struct ath_hw *ah)
 		return true;
 
 	host_isr = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
-	if ((host_isr & AR_INTR_MAC_IRQ) && (host_isr != AR_INTR_SPURIOUS))
+
+	if (((host_isr & AR_INTR_MAC_IRQ) ||
+	     (host_isr & AR_INTR_ASYNC_MASK_MCI)) &&
+	    (host_isr != AR_INTR_SPURIOUS))
 		return true;
 
 	host_isr = REG_READ(ah, AR_INTR_SYNC_CAUSE);
@@ -840,11 +784,11 @@ bool ath9k_hw_intrpend(struct ath_hw *ah)
 }
 EXPORT_SYMBOL(ath9k_hw_intrpend);
 
-void ath9k_hw_disable_interrupts(struct ath_hw *ah)
+void ath9k_hw_kill_interrupts(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
 
-	ath_print(common, ATH_DBG_INTERRUPT, "disable IER\n");
+	ath_dbg(common, INTERRUPT, "disable IER\n");
 	REG_WRITE(ah, AR_IER, AR_IER_DISABLE);
 	(void) REG_READ(ah, AR_IER);
 	if (!AR_SREV_9100(ah)) {
@@ -855,46 +799,68 @@ void ath9k_hw_disable_interrupts(struct ath_hw *ah)
 		(void) REG_READ(ah, AR_INTR_SYNC_ENABLE);
 	}
 }
+EXPORT_SYMBOL(ath9k_hw_kill_interrupts);
+
+void ath9k_hw_disable_interrupts(struct ath_hw *ah)
+{
+	if (!(ah->imask & ATH9K_INT_GLOBAL))
+		atomic_set(&ah->intr_ref_cnt, -1);
+	else
+		atomic_dec(&ah->intr_ref_cnt);
+
+	ath9k_hw_kill_interrupts(ah);
+}
 EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
 
 void ath9k_hw_enable_interrupts(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
+	u32 sync_default = AR_INTR_SYNC_DEFAULT;
+	u32 async_mask;
 
 	if (!(ah->imask & ATH9K_INT_GLOBAL))
 		return;
 
-	ath_print(common, ATH_DBG_INTERRUPT, "enable IER\n");
+	if (!atomic_inc_and_test(&ah->intr_ref_cnt)) {
+		ath_dbg(common, INTERRUPT, "Do not enable IER ref count %d\n",
+			atomic_read(&ah->intr_ref_cnt));
+		return;
+	}
+
+	if (AR_SREV_9340(ah) || AR_SREV_9550(ah) || AR_SREV_9531(ah))
+		sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;
+
+	async_mask = AR_INTR_MAC_IRQ;
+
+	if (ah->imask & ATH9K_INT_MCI)
+		async_mask |= AR_INTR_ASYNC_MASK_MCI;
+
+	ath_dbg(common, INTERRUPT, "enable IER\n");
 	REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
 	if (!AR_SREV_9100(ah)) {
-		REG_WRITE(ah, AR_INTR_ASYNC_ENABLE,
-			  AR_INTR_MAC_IRQ);
-		REG_WRITE(ah, AR_INTR_ASYNC_MASK, AR_INTR_MAC_IRQ);
+		REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, async_mask);
+		REG_WRITE(ah, AR_INTR_ASYNC_MASK, async_mask);
 
-
-		REG_WRITE(ah, AR_INTR_SYNC_ENABLE,
-			  AR_INTR_SYNC_DEFAULT);
-		REG_WRITE(ah, AR_INTR_SYNC_MASK,
-			  AR_INTR_SYNC_DEFAULT);
+		REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
+		REG_WRITE(ah, AR_INTR_SYNC_MASK, sync_default);
 	}
-	ath_print(common, ATH_DBG_INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
-		  REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
+	ath_dbg(common, INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
+		REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
 }
 EXPORT_SYMBOL(ath9k_hw_enable_interrupts);
 
-void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
+void ath9k_hw_set_interrupts(struct ath_hw *ah)
 {
-	enum ath9k_int omask = ah->imask;
+	enum ath9k_int ints = ah->imask;
 	u32 mask, mask2;
 	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath_common *common = ath9k_hw_common(ah);
 
 	if (!(ints & ATH9K_INT_GLOBAL))
-		ath9k_hw_enable_interrupts(ah);
+		ath9k_hw_disable_interrupts(ah);
 
-	ath_print(common, ATH_DBG_INTERRUPT, "0x%x => 0x%x\n", omask, ints);
+	ath_dbg(common, INTERRUPT, "New interrupt mask 0x%x\n", ints);
 
-	/* TODO: global int Ref count */
 	mask = ints & ATH9K_INT_COMMON;
 	mask2 = 0;
 
@@ -931,6 +897,9 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
 			mask |= AR_IMR_GENTMR;
 	}
 
+	if (ints & ATH9K_INT_GENTIMER)
+		mask |= AR_IMR_GENTMR;
+
 	if (ints & (ATH9K_INT_BMISC)) {
 		mask |= AR_IMR_BCNMISC;
 		if (ints & ATH9K_INT_TIM)
@@ -953,11 +922,29 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
 			mask2 |= AR_IMR_S2_CST;
 	}
 
-	ath_print(common, ATH_DBG_INTERRUPT, "new IMR 0x%x\n", mask);
+	if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+		if (ints & ATH9K_INT_BB_WATCHDOG) {
+			mask |= AR_IMR_BCNMISC;
+			mask2 |= AR_IMR_S2_BB_WATCHDOG;
+		}
+	}
+
+	ath_dbg(common, INTERRUPT, "new IMR 0x%x\n", mask);
 	REG_WRITE(ah, AR_IMR, mask);
-	ah->imrs2_reg &= ~(AR_IMR_S2_TIM | AR_IMR_S2_DTIM | AR_IMR_S2_DTIMSYNC |
-			   AR_IMR_S2_CABEND | AR_IMR_S2_CABTO |
-			   AR_IMR_S2_TSFOOR | AR_IMR_S2_GTT | AR_IMR_S2_CST);
+	ah->imrs2_reg &= ~(AR_IMR_S2_TIM |
+			   AR_IMR_S2_DTIM |
+			   AR_IMR_S2_DTIMSYNC |
+			   AR_IMR_S2_CABEND |
+			   AR_IMR_S2_CABTO |
+			   AR_IMR_S2_TSFOOR |
+			   AR_IMR_S2_GTT |
+			   AR_IMR_S2_CST);
+
+	if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+		if (ints & ATH9K_INT_BB_WATCHDOG)
+			ah->imrs2_reg &= ~AR_IMR_S2_BB_WATCHDOG;
+	}
+
 	ah->imrs2_reg |= mask2;
 	REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
 
@@ -968,8 +955,28 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
 			REG_CLR_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
 	}
 
-	ath9k_hw_enable_interrupts(ah);
-
 	return;
 }
 EXPORT_SYMBOL(ath9k_hw_set_interrupts);
+
+#define ATH9K_HW_MAX_DCU       10
+#define ATH9K_HW_SLICE_PER_DCU 16
+#define ATH9K_HW_BIT_IN_SLICE  16
+void ath9k_hw_set_tx_filter(struct ath_hw *ah, u8 destidx, bool set)
+{
+	int dcu_idx;
+	u32 filter;
+
+	for (dcu_idx = 0; dcu_idx < 10; dcu_idx++) {
+		filter = SM(set, AR_D_TXBLK_WRITE_COMMAND);
+		filter |= SM(dcu_idx, AR_D_TXBLK_WRITE_DCU);
+		filter |= SM((destidx / ATH9K_HW_SLICE_PER_DCU),
+			     AR_D_TXBLK_WRITE_SLICE);
+		filter |= BIT(destidx % ATH9K_HW_BIT_IN_SLICE);
+		ath_dbg(ath9k_hw_common(ah), PS,
+			"DCU%d staid %d set %d txfilter %08x\n",
+			dcu_idx, destidx, set, filter);
+		REG_WRITE(ah, AR_D_TXBLK_BASE, filter);
+	}
+}
+EXPORT_SYMBOL(ath9k_hw_set_tx_filter);