drivers/net/wireless/ath/ath9k/ar9003_mac.c - maze/linux - Git at Google

 /*
  * Copyright (c) 2010 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
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #include "hw.h"
 #include "ar9003_mac.h"

 static void ar9003_hw_rx_enable(struct ath_hw *hw)
 {
 	REG_WRITE(hw, AR_CR, 0);
 }

 static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
 {
 	int checksum;

 	checksum = ads->info + ads->link
 		+ ads->data0 + ads->ctl3
 		+ ads->data1 + ads->ctl5
 		+ ads->data2 + ads->ctl7
 		+ ads->data3 + ads->ctl9;

 	return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
 }

 static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
 {
 	struct ar9003_txc *ads = ds;

 	ads->link = ds_link;
 	ads->ctl10 &= ~AR_TxPtrChkSum;
 	ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
 }

 static void ar9003_hw_get_desc_link(void *ds, u32 **ds_link)
 {
 	struct ar9003_txc *ads = ds;

 	*ds_link = &ads->link;
 }

 static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
 {
 	u32 isr = 0;
 	u32 mask2 = 0;
 	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	u32 sync_cause = 0;
 	struct ath_common *common = ath9k_hw_common(ah);

 	if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) {
 		if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
 				== AR_RTC_STATUS_ON)
 			isr = REG_READ(ah, AR_ISR);
 	}

 	sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;

 	*masked = 0;

 	if (!isr && !sync_cause)
 		return false;

 	if (isr) {
 		if (isr & AR_ISR_BCNMISC) {
 			u32 isr2;
 			isr2 = REG_READ(ah, AR_ISR_S2);

 			mask2 |= ((isr2 & AR_ISR_S2_TIM) >>
 				  MAP_ISR_S2_TIM);
 			mask2 |= ((isr2 & AR_ISR_S2_DTIM) >>
 				  MAP_ISR_S2_DTIM);
 			mask2 |= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
 				  MAP_ISR_S2_DTIMSYNC);
 			mask2 |= ((isr2 & AR_ISR_S2_CABEND) >>
 				  MAP_ISR_S2_CABEND);
 			mask2 |= ((isr2 & AR_ISR_S2_GTT) <<
 				  MAP_ISR_S2_GTT);
 			mask2 |= ((isr2 & AR_ISR_S2_CST) <<
 				  MAP_ISR_S2_CST);
 			mask2 |= ((isr2 & AR_ISR_S2_TSFOOR) >>
 				  MAP_ISR_S2_TSFOOR);
 			mask2 |= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
 				  MAP_ISR_S2_BB_WATCHDOG);

 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
 				REG_WRITE(ah, AR_ISR_S2, isr2);
 				isr &= ~AR_ISR_BCNMISC;
 			}
 		}

 		if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
 			isr = REG_READ(ah, AR_ISR_RAC);

 		if (isr == 0xffffffff) {
 			*masked = 0;
 			return false;
 		}

 		*masked = isr & ATH9K_INT_COMMON;

 		if (ah->config.rx_intr_mitigation)
 			if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM))
 				*masked |= ATH9K_INT_RXLP;

 		if (ah->config.tx_intr_mitigation)
 			if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM))
 				*masked |= ATH9K_INT_TX;

 		if (isr & (AR_ISR_LP_RXOK | AR_ISR_RXERR))
 			*masked |= ATH9K_INT_RXLP;

 		if (isr & AR_ISR_HP_RXOK)
 			*masked |= ATH9K_INT_RXHP;

 		if (isr & (AR_ISR_TXOK | AR_ISR_TXERR | AR_ISR_TXEOL)) {
 			*masked |= ATH9K_INT_TX;

 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
 				u32 s0, s1;
 				s0 = REG_READ(ah, AR_ISR_S0);
 				REG_WRITE(ah, AR_ISR_S0, s0);
 				s1 = REG_READ(ah, AR_ISR_S1);
 				REG_WRITE(ah, AR_ISR_S1, s1);

 				isr &= ~(AR_ISR_TXOK | AR_ISR_TXERR |
 					 AR_ISR_TXEOL);
 			}
 		}

 		if (isr & AR_ISR_GENTMR) {
 			u32 s5;

 			if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
 				s5 = REG_READ(ah, AR_ISR_S5_S);
 			else
 				s5 = REG_READ(ah, AR_ISR_S5);

 			ah->intr_gen_timer_trigger =
 				MS(s5, AR_ISR_S5_GENTIMER_TRIG);

 			ah->intr_gen_timer_thresh =
 				MS(s5, AR_ISR_S5_GENTIMER_THRESH);

 			if (ah->intr_gen_timer_trigger)
 				*masked |= ATH9K_INT_GENTIMER;

 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
 				REG_WRITE(ah, AR_ISR_S5, s5);
 				isr &= ~AR_ISR_GENTMR;
 			}

 		}

 		*masked |= mask2;

 		if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
 			REG_WRITE(ah, AR_ISR, isr);

 			(void) REG_READ(ah, AR_ISR);
 		}

 		if (*masked & ATH9K_INT_BB_WATCHDOG)
 			ar9003_hw_bb_watchdog_read(ah);
 	}

 	if (sync_cause) {
 		if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
 			REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
 			REG_WRITE(ah, AR_RC, 0);
 			*masked |= ATH9K_INT_FATAL;
 		}

 		if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
 			ath_dbg(common, ATH_DBG_INTERRUPT,
 				"AR_INTR_SYNC_LOCAL_TIMEOUT\n");

 		REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
 		(void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);

 	}
 	return true;
 }

 static void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,
 				  bool is_firstseg, bool is_lastseg,
 				  const void *ds0, dma_addr_t buf_addr,
 				  unsigned int qcu)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 	unsigned int descid = 0;

 	ads->info = (ATHEROS_VENDOR_ID << AR_DescId_S) |
 				     (1 << AR_TxRxDesc_S) |
 				     (1 << AR_CtrlStat_S) |
 				     (qcu << AR_TxQcuNum_S) | 0x17;

 	ads->data0 = buf_addr;
 	ads->data1 = 0;
 	ads->data2 = 0;
 	ads->data3 = 0;

 	ads->ctl3 = (seglen << AR_BufLen_S);
 	ads->ctl3 &= AR_BufLen;

 	/* Fill in pointer checksum and descriptor id */
 	ads->ctl10 = ar9003_calc_ptr_chksum(ads);
 	ads->ctl10 |= (descid << AR_TxDescId_S);

 	if (is_firstseg) {
 		ads->ctl12 |= (is_lastseg ? 0 : AR_TxMore);
 	} else if (is_lastseg) {
 		ads->ctl11 = 0;
 		ads->ctl12 = 0;
 		ads->ctl13 = AR9003TXC_CONST(ds0)->ctl13;
 		ads->ctl14 = AR9003TXC_CONST(ds0)->ctl14;
 	} else {
 		/* XXX Intermediate descriptor in a multi-descriptor frame.*/
 		ads->ctl11 = 0;
 		ads->ctl12 = AR_TxMore;
 		ads->ctl13 = 0;
 		ads->ctl14 = 0;
 	}
 }

 static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
 				 struct ath_tx_status *ts)
 {
 	struct ar9003_txs *ads;
 	u32 status;

 	ads = &ah->ts_ring[ah->ts_tail];

 	status = ACCESS_ONCE(ads->status8);
 	if ((status & AR_TxDone) == 0)
 		return -EINPROGRESS;

 	ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;

 	if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
 	    (MS(ads->ds_info, AR_TxRxDesc) != 1)) {
 		ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
 			"Tx Descriptor error %x\n", ads->ds_info);
 		memset(ads, 0, sizeof(*ads));
 		return -EIO;
 	}

 	if (status & AR_TxOpExceeded)
 		ts->ts_status |= ATH9K_TXERR_XTXOP;
 	ts->ts_rateindex = MS(status, AR_FinalTxIdx);
 	ts->ts_seqnum = MS(status, AR_SeqNum);
 	ts->tid = MS(status, AR_TxTid);

 	ts->qid = MS(ads->ds_info, AR_TxQcuNum);
 	ts->desc_id = MS(ads->status1, AR_TxDescId);
 	ts->ts_tstamp = ads->status4;
 	ts->ts_status = 0;
 	ts->ts_flags  = 0;

 	status = ACCESS_ONCE(ads->status2);
 	ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
 	ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
 	ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
 	if (status & AR_TxBaStatus) {
 		ts->ts_flags |= ATH9K_TX_BA;
 		ts->ba_low = ads->status5;
 		ts->ba_high = ads->status6;
 	}

 	status = ACCESS_ONCE(ads->status3);
 	if (status & AR_ExcessiveRetries)
 		ts->ts_status |= ATH9K_TXERR_XRETRY;
 	if (status & AR_Filtered)
 		ts->ts_status |= ATH9K_TXERR_FILT;
 	if (status & AR_FIFOUnderrun) {
 		ts->ts_status |= ATH9K_TXERR_FIFO;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
 	if (status & AR_TxTimerExpired)
 		ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
 	if (status & AR_DescCfgErr)
 		ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
 	if (status & AR_TxDataUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
 	if (status & AR_TxDelimUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
 	ts->ts_shortretry = MS(status, AR_RTSFailCnt);
 	ts->ts_longretry = MS(status, AR_DataFailCnt);
 	ts->ts_virtcol = MS(status, AR_VirtRetryCnt);

 	status = ACCESS_ONCE(ads->status7);
 	ts->ts_rssi = MS(status, AR_TxRSSICombined);
 	ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
 	ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
 	ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);

 	memset(ads, 0, sizeof(*ads));

 	return 0;
 }

 static void ar9003_hw_set11n_txdesc(struct ath_hw *ah, void *ds,
 		u32 pktlen, enum ath9k_pkt_type type, u32 txpower,
 		u32 keyIx, enum ath9k_key_type keyType, u32 flags)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;

 	if (txpower > ah->txpower_limit)
 		txpower = ah->txpower_limit;

 	if (txpower > 63)
 		txpower = 63;

 	ads->ctl11 = (pktlen & AR_FrameLen)
 		| (flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
 		| SM(txpower, AR_XmitPower)
 		| (flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
 		| (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
 		| (flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0);

 	ads->ctl12 =
 		(keyIx != ATH9K_TXKEYIX_INVALID ? SM(keyIx, AR_DestIdx) : 0)
 		| SM(type, AR_FrameType)
 		| (flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
 		| (flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
 		| (flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);

 	ads->ctl17 = SM(keyType, AR_EncrType) |
 		     (flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
 	ads->ctl18 = 0;
 	ads->ctl19 = AR_Not_Sounding;

 	ads->ctl20 = 0;
 	ads->ctl21 = 0;
 	ads->ctl22 = 0;
 }

 static void ar9003_hw_set_clrdmask(struct ath_hw *ah, void *ds, bool val)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;

 	if (val)
 		ads->ctl11 |= AR_ClrDestMask;
 	else
 		ads->ctl11 &= ~AR_ClrDestMask;
 }

 static void ar9003_hw_set11n_ratescenario(struct ath_hw *ah, void *ds,
 					  void *lastds,
 					  u32 durUpdateEn, u32 rtsctsRate,
 					  u32 rtsctsDuration,
 					  struct ath9k_11n_rate_series series[],
 					  u32 nseries, u32 flags)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 	struct ar9003_txc *last_ads = (struct ar9003_txc *) lastds;
 	u_int32_t ctl11;

 	if (flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)) {
 		ctl11 = ads->ctl11;

 		if (flags & ATH9K_TXDESC_RTSENA) {
 			ctl11 &= ~AR_CTSEnable;
 			ctl11 |= AR_RTSEnable;
 		} else {
 			ctl11 &= ~AR_RTSEnable;
 			ctl11 |= AR_CTSEnable;
 		}

 		ads->ctl11 = ctl11;
 	} else {
 		ads->ctl11 = (ads->ctl11 & ~(AR_RTSEnable | AR_CTSEnable));
 	}

 	ads->ctl13 = set11nTries(series, 0)
 		|  set11nTries(series, 1)
 		|  set11nTries(series, 2)
 		|  set11nTries(series, 3)
 		|  (durUpdateEn ? AR_DurUpdateEna : 0)
 		|  SM(0, AR_BurstDur);

 	ads->ctl14 = set11nRate(series, 0)
 		|  set11nRate(series, 1)
 		|  set11nRate(series, 2)
 		|  set11nRate(series, 3);

 	ads->ctl15 = set11nPktDurRTSCTS(series, 0)
 		|  set11nPktDurRTSCTS(series, 1);

 	ads->ctl16 = set11nPktDurRTSCTS(series, 2)
 		|  set11nPktDurRTSCTS(series, 3);

 	ads->ctl18 = set11nRateFlags(series, 0)
 		|  set11nRateFlags(series, 1)
 		|  set11nRateFlags(series, 2)
 		|  set11nRateFlags(series, 3)
 		| SM(rtsctsRate, AR_RTSCTSRate);
 	ads->ctl19 = AR_Not_Sounding;

 	last_ads->ctl13 = ads->ctl13;
 	last_ads->ctl14 = ads->ctl14;
 }

 static void ar9003_hw_set11n_aggr_first(struct ath_hw *ah, void *ds,
 					u32 aggrLen)
 {
 #define FIRST_DESC_NDELIMS 60
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;

 	ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);

 	if (ah->ent_mode & AR_ENT_OTP_MPSD) {
 		u32 ctl17, ndelim;
 		/*
 		 * Add delimiter when using RTS/CTS with aggregation
 		 * and non enterprise AR9003 card
 		 */
 		ctl17 = ads->ctl17;
 		ndelim = MS(ctl17, AR_PadDelim);

 		if (ndelim < FIRST_DESC_NDELIMS) {
 			aggrLen += (FIRST_DESC_NDELIMS - ndelim) * 4;
 			ndelim = FIRST_DESC_NDELIMS;
 		}

 		ctl17 &= ~AR_AggrLen;
 		ctl17 |= SM(aggrLen, AR_AggrLen);

 		ctl17 &= ~AR_PadDelim;
 		ctl17 |= SM(ndelim, AR_PadDelim);

 		ads->ctl17 = ctl17;
 	} else {
 		ads->ctl17 &= ~AR_AggrLen;
 		ads->ctl17 |= SM(aggrLen, AR_AggrLen);
 	}
 }

 static void ar9003_hw_set11n_aggr_middle(struct ath_hw *ah, void *ds,
 					 u32 numDelims)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;
 	unsigned int ctl17;

 	ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);

 	/*
 	 * We use a stack variable to manipulate ctl6 to reduce uncached
 	 * read modify, modfiy, write.
 	 */
 	ctl17 = ads->ctl17;
 	ctl17 &= ~AR_PadDelim;
 	ctl17 |= SM(numDelims, AR_PadDelim);
 	ads->ctl17 = ctl17;
 }

 static void ar9003_hw_set11n_aggr_last(struct ath_hw *ah, void *ds)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;

 	ads->ctl12 |= AR_IsAggr;
 	ads->ctl12 &= ~AR_MoreAggr;
 	ads->ctl17 &= ~AR_PadDelim;
 }

 static void ar9003_hw_clr11n_aggr(struct ath_hw *ah, void *ds)
 {
 	struct ar9003_txc *ads = (struct ar9003_txc *) ds;

 	ads->ctl12 &= (~AR_IsAggr & ~AR_MoreAggr);
 }

 void ar9003_hw_set_paprd_txdesc(struct ath_hw *ah, void *ds, u8 chains)
 {
 	struct ar9003_txc *ads = ds;

 	ads->ctl12 |= SM(chains, AR_PAPRDChainMask);
 }
 EXPORT_SYMBOL(ar9003_hw_set_paprd_txdesc);

 void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
 {
 	struct ath_hw_ops *ops = ath9k_hw_ops(hw);

 	ops->rx_enable = ar9003_hw_rx_enable;
 	ops->set_desc_link = ar9003_hw_set_desc_link;
 	ops->get_desc_link = ar9003_hw_get_desc_link;
 	ops->get_isr = ar9003_hw_get_isr;
 	ops->fill_txdesc = ar9003_hw_fill_txdesc;
 	ops->proc_txdesc = ar9003_hw_proc_txdesc;
 	ops->set11n_txdesc = ar9003_hw_set11n_txdesc;
 	ops->set11n_ratescenario = ar9003_hw_set11n_ratescenario;
 	ops->set11n_aggr_first = ar9003_hw_set11n_aggr_first;
 	ops->set11n_aggr_middle = ar9003_hw_set11n_aggr_middle;
 	ops->set11n_aggr_last = ar9003_hw_set11n_aggr_last;
 	ops->clr11n_aggr = ar9003_hw_clr11n_aggr;
 	ops->set_clrdmask = ar9003_hw_set_clrdmask;
 }

 void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
 {
 	REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
 }
 EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);

 void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
 			    enum ath9k_rx_qtype qtype)
 {
 	if (qtype == ATH9K_RX_QUEUE_HP)
 		REG_WRITE(ah, AR_HP_RXDP, rxdp);
 	else
 		REG_WRITE(ah, AR_LP_RXDP, rxdp);
 }
 EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);

 int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
 				 void *buf_addr)
 {
 	struct ar9003_rxs *rxsp = (struct ar9003_rxs *) buf_addr;
 	unsigned int phyerr;

 	/* TODO: byte swap on big endian for ar9300_10 */

 	if ((rxsp->status11 & AR_RxDone) == 0)
 		return -EINPROGRESS;

 	if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
 		return -EINVAL;

 	if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0)
 		return -EINPROGRESS;

 	if (!rxs)
 		return 0;

 	rxs->rs_status = 0;
 	rxs->rs_flags =  0;

 	rxs->rs_datalen = rxsp->status2 & AR_DataLen;
 	rxs->rs_tstamp =  rxsp->status3;

 	/* XXX: Keycache */
 	rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
 	rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
 	rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
 	rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
 	rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
 	rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
 	rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);

 	if (rxsp->status11 & AR_RxKeyIdxValid)
 		rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
 	else
 		rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;

 	rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
 	rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;

 	rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
 	rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
 	rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
 	rxs->rs_flags  = (rxsp->status4 & AR_GI) ? ATH9K_RX_GI : 0;
 	rxs->rs_flags  |= (rxsp->status4 & AR_2040) ? ATH9K_RX_2040 : 0;

 	rxs->evm0 = rxsp->status6;
 	rxs->evm1 = rxsp->status7;
 	rxs->evm2 = rxsp->status8;
 	rxs->evm3 = rxsp->status9;
 	rxs->evm4 = (rxsp->status10 & 0xffff);

 	if (rxsp->status11 & AR_PreDelimCRCErr)
 		rxs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;

 	if (rxsp->status11 & AR_PostDelimCRCErr)
 		rxs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;

 	if (rxsp->status11 & AR_DecryptBusyErr)
 		rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;

 	if ((rxsp->status11 & AR_RxFrameOK) == 0) {
 		/*
 		 * AR_CRCErr will bet set to true if we're on the last
 		 * subframe and the AR_PostDelimCRCErr is caught.
 		 * In a way this also gives us a guarantee that when
 		 * (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
 		 * possibly be reviewing the last subframe. AR_CRCErr
 		 * is the CRC of the actual data.
 		 */
 		if (rxsp->status11 & AR_CRCErr)
 			rxs->rs_status |= ATH9K_RXERR_CRC;
 		else if (rxsp->status11 & AR_PHYErr) {
 			phyerr = MS(rxsp->status11, AR_PHYErrCode);
 			/*
 			 * If we reach a point here where AR_PostDelimCRCErr is
 			 * true it implies we're *not* on the last subframe. In
 			 * in that case that we know already that the CRC of
 			 * the frame was OK, and MAC would send an ACK for that
 			 * subframe, even if we did get a phy error of type
 			 * ATH9K_PHYERR_OFDM_RESTART. This is only applicable
 			 * to frame that are prior to the last subframe.
 			 * The AR_PostDelimCRCErr is the CRC for the MPDU
 			 * delimiter, which contains the 4 reserved bits,
 			 * the MPDU length (12 bits), and follows the MPDU
 			 * delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
 			 */
 			if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
 			    (rxsp->status11 & AR_PostDelimCRCErr)) {
 				rxs->rs_phyerr = 0;
 			} else {
 				rxs->rs_status |= ATH9K_RXERR_PHY;
 				rxs->rs_phyerr = phyerr;
 			}

 		} else if (rxsp->status11 & AR_DecryptCRCErr)
 			rxs->rs_status |= ATH9K_RXERR_DECRYPT;
 		else if (rxsp->status11 & AR_MichaelErr)
 			rxs->rs_status |= ATH9K_RXERR_MIC;

 		if (rxsp->status11 & AR_KeyMiss)
 			rxs->rs_status |= ATH9K_RXERR_DECRYPT;
 	}

 	return 0;
 }
 EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);

 void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
 {
 	ah->ts_tail = 0;

 	memset((void *) ah->ts_ring, 0,
 		ah->ts_size * sizeof(struct ar9003_txs));

 	ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
 		"TS Start 0x%x End 0x%x Virt %p, Size %d\n",
 		ah->ts_paddr_start, ah->ts_paddr_end,
 		ah->ts_ring, ah->ts_size);

 	REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
 	REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
 }

 void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
 			       u32 ts_paddr_start,
 			       u8 size)
 {

 	ah->ts_paddr_start = ts_paddr_start;
 	ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
 	ah->ts_size = size;
 	ah->ts_ring = (struct ar9003_txs *) ts_start;

 	ath9k_hw_reset_txstatus_ring(ah);
 }
 EXPORT_SYMBOL(ath9k_hw_setup_statusring);
	/*
	* Copyright (c) 2010 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
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/
	#include "hw.h"
	#include "ar9003_mac.h"

	static void ar9003_hw_rx_enable(struct ath_hw *hw)
	{
	REG_WRITE(hw, AR_CR, 0);
	}

	static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
	{
	int checksum;

	checksum = ads->info + ads->link
	+ ads->data0 + ads->ctl3
	+ ads->data1 + ads->ctl5
	+ ads->data2 + ads->ctl7
	+ ads->data3 + ads->ctl9;

	return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
	}

	static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
	{
	struct ar9003_txc *ads = ds;

	ads->link = ds_link;
	ads->ctl10 &= ~AR_TxPtrChkSum;
	ads->ctl10 \|= ar9003_calc_ptr_chksum(ads);
	}

	static void ar9003_hw_get_desc_link(void ds, u32 *ds_link)
	{
	struct ar9003_txc *ads = ds;

	*ds_link = &ads->link;
	}

	static bool ar9003_hw_get_isr(struct ath_hw ah, enum ath9k_int masked)
	{
	u32 isr = 0;
	u32 mask2 = 0;
	struct ath9k_hw_capabilities *pCap = &ah->caps;
	u32 sync_cause = 0;
	struct ath_common *common = ath9k_hw_common(ah);

	if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) {
	if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
	== AR_RTC_STATUS_ON)
	isr = REG_READ(ah, AR_ISR);
	}

	sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;

	*masked = 0;

	if (!isr && !sync_cause)
	return false;

	if (isr) {
	if (isr & AR_ISR_BCNMISC) {
	u32 isr2;
	isr2 = REG_READ(ah, AR_ISR_S2);

	mask2 \|= ((isr2 & AR_ISR_S2_TIM) >>
	MAP_ISR_S2_TIM);
	mask2 \|= ((isr2 & AR_ISR_S2_DTIM) >>
	MAP_ISR_S2_DTIM);
	mask2 \|= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
	MAP_ISR_S2_DTIMSYNC);
	mask2 \|= ((isr2 & AR_ISR_S2_CABEND) >>
	MAP_ISR_S2_CABEND);
	mask2 \|= ((isr2 & AR_ISR_S2_GTT) <<
	MAP_ISR_S2_GTT);
	mask2 \|= ((isr2 & AR_ISR_S2_CST) <<
	MAP_ISR_S2_CST);
	mask2 \|= ((isr2 & AR_ISR_S2_TSFOOR) >>
	MAP_ISR_S2_TSFOOR);
	mask2 \|= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
	MAP_ISR_S2_BB_WATCHDOG);

	if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
	REG_WRITE(ah, AR_ISR_S2, isr2);
	isr &= ~AR_ISR_BCNMISC;
	}
	}

	if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
	isr = REG_READ(ah, AR_ISR_RAC);

	if (isr == 0xffffffff) {
	*masked = 0;
	return false;
	}

	*masked = isr & ATH9K_INT_COMMON;

	if (ah->config.rx_intr_mitigation)
	if (isr & (AR_ISR_RXMINTR \| AR_ISR_RXINTM))
	*masked \|= ATH9K_INT_RXLP;

	if (ah->config.tx_intr_mitigation)
	if (isr & (AR_ISR_TXMINTR \| AR_ISR_TXINTM))
	*masked \|= ATH9K_INT_TX;

	if (isr & (AR_ISR_LP_RXOK \| AR_ISR_RXERR))
	*masked \|= ATH9K_INT_RXLP;

	if (isr & AR_ISR_HP_RXOK)
	*masked \|= ATH9K_INT_RXHP;

	if (isr & (AR_ISR_TXOK \| AR_ISR_TXERR \| AR_ISR_TXEOL)) {
	*masked \|= ATH9K_INT_TX;

	if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
	u32 s0, s1;
	s0 = REG_READ(ah, AR_ISR_S0);
	REG_WRITE(ah, AR_ISR_S0, s0);
	s1 = REG_READ(ah, AR_ISR_S1);
	REG_WRITE(ah, AR_ISR_S1, s1);

	isr &= ~(AR_ISR_TXOK \| AR_ISR_TXERR \|
	AR_ISR_TXEOL);
	}
	}

	if (isr & AR_ISR_GENTMR) {
	u32 s5;

	if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
	s5 = REG_READ(ah, AR_ISR_S5_S);
	else
	s5 = REG_READ(ah, AR_ISR_S5);

	ah->intr_gen_timer_trigger =
	MS(s5, AR_ISR_S5_GENTIMER_TRIG);

	ah->intr_gen_timer_thresh =
	MS(s5, AR_ISR_S5_GENTIMER_THRESH);

	if (ah->intr_gen_timer_trigger)
	*masked \|= ATH9K_INT_GENTIMER;

	if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
	REG_WRITE(ah, AR_ISR_S5, s5);
	isr &= ~AR_ISR_GENTMR;
	}

	}

	*masked \|= mask2;

	if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
	REG_WRITE(ah, AR_ISR, isr);

	(void) REG_READ(ah, AR_ISR);
	}

	if (*masked & ATH9K_INT_BB_WATCHDOG)
	ar9003_hw_bb_watchdog_read(ah);
	}

	if (sync_cause) {
	if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
	REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
	REG_WRITE(ah, AR_RC, 0);
	*masked \|= ATH9K_INT_FATAL;
	}

	if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
	ath_dbg(common, ATH_DBG_INTERRUPT,
	"AR_INTR_SYNC_LOCAL_TIMEOUT\n");

	REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
	(void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);

	}
	return true;
	}

	static void ar9003_hw_fill_txdesc(struct ath_hw ah, void ds, u32 seglen,
	bool is_firstseg, bool is_lastseg,
	const void *ds0, dma_addr_t buf_addr,
	unsigned int qcu)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;
	unsigned int descid = 0;

	ads->info = (ATHEROS_VENDOR_ID << AR_DescId_S) \|
	(1 << AR_TxRxDesc_S) \|
	(1 << AR_CtrlStat_S) \|
	(qcu << AR_TxQcuNum_S) \| 0x17;

	ads->data0 = buf_addr;
	ads->data1 = 0;
	ads->data2 = 0;
	ads->data3 = 0;

	ads->ctl3 = (seglen << AR_BufLen_S);
	ads->ctl3 &= AR_BufLen;

	/* Fill in pointer checksum and descriptor id */
	ads->ctl10 = ar9003_calc_ptr_chksum(ads);
	ads->ctl10 \|= (descid << AR_TxDescId_S);

	if (is_firstseg) {
	ads->ctl12 \|= (is_lastseg ? 0 : AR_TxMore);
	} else if (is_lastseg) {
	ads->ctl11 = 0;
	ads->ctl12 = 0;
	ads->ctl13 = AR9003TXC_CONST(ds0)->ctl13;
	ads->ctl14 = AR9003TXC_CONST(ds0)->ctl14;
	} else {
	/* XXX Intermediate descriptor in a multi-descriptor frame.*/
	ads->ctl11 = 0;
	ads->ctl12 = AR_TxMore;
	ads->ctl13 = 0;
	ads->ctl14 = 0;
	}
	}

	static int ar9003_hw_proc_txdesc(struct ath_hw ah, void ds,
	struct ath_tx_status *ts)
	{
	struct ar9003_txs *ads;
	u32 status;

	ads = &ah->ts_ring[ah->ts_tail];

	status = ACCESS_ONCE(ads->status8);
	if ((status & AR_TxDone) == 0)
	return -EINPROGRESS;

	ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;

	if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) \|\|
	(MS(ads->ds_info, AR_TxRxDesc) != 1)) {
	ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
	"Tx Descriptor error %x\n", ads->ds_info);
	memset(ads, 0, sizeof(*ads));
	return -EIO;
	}

	if (status & AR_TxOpExceeded)
	ts->ts_status \|= ATH9K_TXERR_XTXOP;
	ts->ts_rateindex = MS(status, AR_FinalTxIdx);
	ts->ts_seqnum = MS(status, AR_SeqNum);
	ts->tid = MS(status, AR_TxTid);

	ts->qid = MS(ads->ds_info, AR_TxQcuNum);
	ts->desc_id = MS(ads->status1, AR_TxDescId);
	ts->ts_tstamp = ads->status4;
	ts->ts_status = 0;
	ts->ts_flags = 0;

	status = ACCESS_ONCE(ads->status2);
	ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
	ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
	ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
	if (status & AR_TxBaStatus) {
	ts->ts_flags \|= ATH9K_TX_BA;
	ts->ba_low = ads->status5;
	ts->ba_high = ads->status6;
	}

	status = ACCESS_ONCE(ads->status3);
	if (status & AR_ExcessiveRetries)
	ts->ts_status \|= ATH9K_TXERR_XRETRY;
	if (status & AR_Filtered)
	ts->ts_status \|= ATH9K_TXERR_FILT;
	if (status & AR_FIFOUnderrun) {
	ts->ts_status \|= ATH9K_TXERR_FIFO;
	ath9k_hw_updatetxtriglevel(ah, true);
	}
	if (status & AR_TxTimerExpired)
	ts->ts_status \|= ATH9K_TXERR_TIMER_EXPIRED;
	if (status & AR_DescCfgErr)
	ts->ts_flags \|= ATH9K_TX_DESC_CFG_ERR;
	if (status & AR_TxDataUnderrun) {
	ts->ts_flags \|= ATH9K_TX_DATA_UNDERRUN;
	ath9k_hw_updatetxtriglevel(ah, true);
	}
	if (status & AR_TxDelimUnderrun) {
	ts->ts_flags \|= ATH9K_TX_DELIM_UNDERRUN;
	ath9k_hw_updatetxtriglevel(ah, true);
	}
	ts->ts_shortretry = MS(status, AR_RTSFailCnt);
	ts->ts_longretry = MS(status, AR_DataFailCnt);
	ts->ts_virtcol = MS(status, AR_VirtRetryCnt);

	status = ACCESS_ONCE(ads->status7);
	ts->ts_rssi = MS(status, AR_TxRSSICombined);
	ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
	ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
	ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);

	memset(ads, 0, sizeof(*ads));

	return 0;
	}

	static void ar9003_hw_set11n_txdesc(struct ath_hw ah, void ds,
	u32 pktlen, enum ath9k_pkt_type type, u32 txpower,
	u32 keyIx, enum ath9k_key_type keyType, u32 flags)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;

	if (txpower > ah->txpower_limit)
	txpower = ah->txpower_limit;

	if (txpower > 63)
	txpower = 63;

	ads->ctl11 = (pktlen & AR_FrameLen)
	\| (flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
	\| SM(txpower, AR_XmitPower)
	\| (flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
	\| (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
	\| (flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0);

	ads->ctl12 =
	(keyIx != ATH9K_TXKEYIX_INVALID ? SM(keyIx, AR_DestIdx) : 0)
	\| SM(type, AR_FrameType)
	\| (flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
	\| (flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
	\| (flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);

	ads->ctl17 = SM(keyType, AR_EncrType) \|
	(flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
	ads->ctl18 = 0;
	ads->ctl19 = AR_Not_Sounding;

	ads->ctl20 = 0;
	ads->ctl21 = 0;
	ads->ctl22 = 0;
	}

	static void ar9003_hw_set_clrdmask(struct ath_hw ah, void ds, bool val)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;

	if (val)
	ads->ctl11 \|= AR_ClrDestMask;
	else
	ads->ctl11 &= ~AR_ClrDestMask;
	}

	static void ar9003_hw_set11n_ratescenario(struct ath_hw ah, void ds,
	void *lastds,
	u32 durUpdateEn, u32 rtsctsRate,
	u32 rtsctsDuration,
	struct ath9k_11n_rate_series series[],
	u32 nseries, u32 flags)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;
	struct ar9003_txc last_ads = (struct ar9003_txc ) lastds;
	u_int32_t ctl11;

	if (flags & (ATH9K_TXDESC_RTSENA \| ATH9K_TXDESC_CTSENA)) {
	ctl11 = ads->ctl11;

	if (flags & ATH9K_TXDESC_RTSENA) {
	ctl11 &= ~AR_CTSEnable;
	ctl11 \|= AR_RTSEnable;
	} else {
	ctl11 &= ~AR_RTSEnable;
	ctl11 \|= AR_CTSEnable;
	}

	ads->ctl11 = ctl11;
	} else {
	ads->ctl11 = (ads->ctl11 & ~(AR_RTSEnable \| AR_CTSEnable));
	}

	ads->ctl13 = set11nTries(series, 0)
	\| set11nTries(series, 1)
	\| set11nTries(series, 2)
	\| set11nTries(series, 3)
	\| (durUpdateEn ? AR_DurUpdateEna : 0)
	\| SM(0, AR_BurstDur);

	ads->ctl14 = set11nRate(series, 0)
	\| set11nRate(series, 1)
	\| set11nRate(series, 2)
	\| set11nRate(series, 3);

	ads->ctl15 = set11nPktDurRTSCTS(series, 0)
	\| set11nPktDurRTSCTS(series, 1);

	ads->ctl16 = set11nPktDurRTSCTS(series, 2)
	\| set11nPktDurRTSCTS(series, 3);

	ads->ctl18 = set11nRateFlags(series, 0)
	\| set11nRateFlags(series, 1)
	\| set11nRateFlags(series, 2)
	\| set11nRateFlags(series, 3)
	\| SM(rtsctsRate, AR_RTSCTSRate);
	ads->ctl19 = AR_Not_Sounding;

	last_ads->ctl13 = ads->ctl13;
	last_ads->ctl14 = ads->ctl14;
	}

	static void ar9003_hw_set11n_aggr_first(struct ath_hw ah, void ds,
	u32 aggrLen)
	{
	#define FIRST_DESC_NDELIMS 60
	struct ar9003_txc ads = (struct ar9003_txc ) ds;

	ads->ctl12 \|= (AR_IsAggr \| AR_MoreAggr);

	if (ah->ent_mode & AR_ENT_OTP_MPSD) {
	u32 ctl17, ndelim;
	/*
	* Add delimiter when using RTS/CTS with aggregation
	* and non enterprise AR9003 card
	*/
	ctl17 = ads->ctl17;
	ndelim = MS(ctl17, AR_PadDelim);

	if (ndelim < FIRST_DESC_NDELIMS) {
	aggrLen += (FIRST_DESC_NDELIMS - ndelim) * 4;
	ndelim = FIRST_DESC_NDELIMS;
	}

	ctl17 &= ~AR_AggrLen;
	ctl17 \|= SM(aggrLen, AR_AggrLen);

	ctl17 &= ~AR_PadDelim;
	ctl17 \|= SM(ndelim, AR_PadDelim);

	ads->ctl17 = ctl17;
	} else {
	ads->ctl17 &= ~AR_AggrLen;
	ads->ctl17 \|= SM(aggrLen, AR_AggrLen);
	}
	}

	static void ar9003_hw_set11n_aggr_middle(struct ath_hw ah, void ds,
	u32 numDelims)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;
	unsigned int ctl17;

	ads->ctl12 \|= (AR_IsAggr \| AR_MoreAggr);

	/*
	* We use a stack variable to manipulate ctl6 to reduce uncached
	* read modify, modfiy, write.
	*/
	ctl17 = ads->ctl17;
	ctl17 &= ~AR_PadDelim;
	ctl17 \|= SM(numDelims, AR_PadDelim);
	ads->ctl17 = ctl17;
	}

	static void ar9003_hw_set11n_aggr_last(struct ath_hw ah, void ds)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;

	ads->ctl12 \|= AR_IsAggr;
	ads->ctl12 &= ~AR_MoreAggr;
	ads->ctl17 &= ~AR_PadDelim;
	}

	static void ar9003_hw_clr11n_aggr(struct ath_hw ah, void ds)
	{
	struct ar9003_txc ads = (struct ar9003_txc ) ds;

	ads->ctl12 &= (~AR_IsAggr & ~AR_MoreAggr);
	}

	void ar9003_hw_set_paprd_txdesc(struct ath_hw ah, void ds, u8 chains)
	{
	struct ar9003_txc *ads = ds;

	ads->ctl12 \|= SM(chains, AR_PAPRDChainMask);
	}
	EXPORT_SYMBOL(ar9003_hw_set_paprd_txdesc);

	void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
	{
	struct ath_hw_ops *ops = ath9k_hw_ops(hw);

	ops->rx_enable = ar9003_hw_rx_enable;
	ops->set_desc_link = ar9003_hw_set_desc_link;
	ops->get_desc_link = ar9003_hw_get_desc_link;
	ops->get_isr = ar9003_hw_get_isr;
	ops->fill_txdesc = ar9003_hw_fill_txdesc;
	ops->proc_txdesc = ar9003_hw_proc_txdesc;
	ops->set11n_txdesc = ar9003_hw_set11n_txdesc;
	ops->set11n_ratescenario = ar9003_hw_set11n_ratescenario;
	ops->set11n_aggr_first = ar9003_hw_set11n_aggr_first;
	ops->set11n_aggr_middle = ar9003_hw_set11n_aggr_middle;
	ops->set11n_aggr_last = ar9003_hw_set11n_aggr_last;
	ops->clr11n_aggr = ar9003_hw_clr11n_aggr;
	ops->set_clrdmask = ar9003_hw_set_clrdmask;
	}

	void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
	{
	REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
	}
	EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);

	void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
	enum ath9k_rx_qtype qtype)
	{
	if (qtype == ATH9K_RX_QUEUE_HP)
	REG_WRITE(ah, AR_HP_RXDP, rxdp);
	else
	REG_WRITE(ah, AR_LP_RXDP, rxdp);
	}
	EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);

	int ath9k_hw_process_rxdesc_edma(struct ath_hw ah, struct ath_rx_status rxs,
	void *buf_addr)
	{
	struct ar9003_rxs rxsp = (struct ar9003_rxs ) buf_addr;
	unsigned int phyerr;

	/* TODO: byte swap on big endian for ar9300_10 */

	if ((rxsp->status11 & AR_RxDone) == 0)
	return -EINPROGRESS;

	if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
	return -EINVAL;

	if ((rxsp->ds_info & (AR_TxRxDesc \| AR_CtrlStat)) != 0)
	return -EINPROGRESS;

	if (!rxs)
	return 0;

	rxs->rs_status = 0;
	rxs->rs_flags = 0;

	rxs->rs_datalen = rxsp->status2 & AR_DataLen;
	rxs->rs_tstamp = rxsp->status3;

	/* XXX: Keycache */
	rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
	rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
	rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
	rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
	rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
	rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
	rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);

	if (rxsp->status11 & AR_RxKeyIdxValid)
	rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
	else
	rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;

	rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
	rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;

	rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
	rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
	rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
	rxs->rs_flags = (rxsp->status4 & AR_GI) ? ATH9K_RX_GI : 0;
	rxs->rs_flags \|= (rxsp->status4 & AR_2040) ? ATH9K_RX_2040 : 0;

	rxs->evm0 = rxsp->status6;
	rxs->evm1 = rxsp->status7;
	rxs->evm2 = rxsp->status8;
	rxs->evm3 = rxsp->status9;
	rxs->evm4 = (rxsp->status10 & 0xffff);

	if (rxsp->status11 & AR_PreDelimCRCErr)
	rxs->rs_flags \|= ATH9K_RX_DELIM_CRC_PRE;

	if (rxsp->status11 & AR_PostDelimCRCErr)
	rxs->rs_flags \|= ATH9K_RX_DELIM_CRC_POST;

	if (rxsp->status11 & AR_DecryptBusyErr)
	rxs->rs_flags \|= ATH9K_RX_DECRYPT_BUSY;

	if ((rxsp->status11 & AR_RxFrameOK) == 0) {
	/*
	* AR_CRCErr will bet set to true if we're on the last
	* subframe and the AR_PostDelimCRCErr is caught.
	* In a way this also gives us a guarantee that when
	* (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
	* possibly be reviewing the last subframe. AR_CRCErr
	* is the CRC of the actual data.
	*/
	if (rxsp->status11 & AR_CRCErr)
	rxs->rs_status \|= ATH9K_RXERR_CRC;
	else if (rxsp->status11 & AR_PHYErr) {
	phyerr = MS(rxsp->status11, AR_PHYErrCode);
	/*
	* If we reach a point here where AR_PostDelimCRCErr is
	* true it implies we're not on the last subframe. In
	* in that case that we know already that the CRC of
	* the frame was OK, and MAC would send an ACK for that
	* subframe, even if we did get a phy error of type
	* ATH9K_PHYERR_OFDM_RESTART. This is only applicable
	* to frame that are prior to the last subframe.
	* The AR_PostDelimCRCErr is the CRC for the MPDU
	* delimiter, which contains the 4 reserved bits,
	* the MPDU length (12 bits), and follows the MPDU
	* delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
	*/
	if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
	(rxsp->status11 & AR_PostDelimCRCErr)) {
	rxs->rs_phyerr = 0;
	} else {
	rxs->rs_status \|= ATH9K_RXERR_PHY;
	rxs->rs_phyerr = phyerr;
	}

	} else if (rxsp->status11 & AR_DecryptCRCErr)
	rxs->rs_status \|= ATH9K_RXERR_DECRYPT;
	else if (rxsp->status11 & AR_MichaelErr)
	rxs->rs_status \|= ATH9K_RXERR_MIC;

	if (rxsp->status11 & AR_KeyMiss)
	rxs->rs_status \|= ATH9K_RXERR_DECRYPT;
	}

	return 0;
	}
	EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);

	void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
	{
	ah->ts_tail = 0;

	memset((void *) ah->ts_ring, 0,
	ah->ts_size * sizeof(struct ar9003_txs));

	ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
	"TS Start 0x%x End 0x%x Virt %p, Size %d\n",
	ah->ts_paddr_start, ah->ts_paddr_end,
	ah->ts_ring, ah->ts_size);

	REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
	REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
	}

	void ath9k_hw_setup_statusring(struct ath_hw ah, void ts_start,
	u32 ts_paddr_start,
	u8 size)
	{

	ah->ts_paddr_start = ts_paddr_start;
	ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
	ah->ts_size = size;
	ah->ts_ring = (struct ar9003_txs *) ts_start;

	ath9k_hw_reset_txstatus_ring(ah);
	}
	EXPORT_SYMBOL(ath9k_hw_setup_statusring);