1 /*
2  * Copyright (c) 2010-2011 Atheros Communications Inc.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 #include <linux/export.h>
17 #include "hw.h"
18 #include "ar9003_mac.h"
19 #include "ar9003_mci.h"
20 
21 static void ar9003_hw_rx_enable(struct ath_hw *hw)
22 {
23 	REG_WRITE(hw, AR_CR, 0);
24 }
25 
26 static void
27 ar9003_set_txdesc(struct ath_hw *ah, void *ds, struct ath_tx_info *i)
28 {
29 	struct ar9003_txc *ads = ds;
30 	int checksum = 0;
31 	u32 val, ctl12, ctl17;
32 	u8 desc_len;
33 
34 	desc_len = ((AR_SREV_9462(ah) || AR_SREV_9565(ah)) ? 0x18 : 0x17);
35 
36 	val = (ATHEROS_VENDOR_ID << AR_DescId_S) |
37 	      (1 << AR_TxRxDesc_S) |
38 	      (1 << AR_CtrlStat_S) |
39 	      (i->qcu << AR_TxQcuNum_S) | desc_len;
40 
41 	checksum += val;
42 	WRITE_ONCE(ads->info, val);
43 
44 	checksum += i->link;
45 	WRITE_ONCE(ads->link, i->link);
46 
47 	checksum += i->buf_addr[0];
48 	WRITE_ONCE(ads->data0, i->buf_addr[0]);
49 	checksum += i->buf_addr[1];
50 	WRITE_ONCE(ads->data1, i->buf_addr[1]);
51 	checksum += i->buf_addr[2];
52 	WRITE_ONCE(ads->data2, i->buf_addr[2]);
53 	checksum += i->buf_addr[3];
54 	WRITE_ONCE(ads->data3, i->buf_addr[3]);
55 
56 	checksum += (val = (i->buf_len[0] << AR_BufLen_S) & AR_BufLen);
57 	WRITE_ONCE(ads->ctl3, val);
58 	checksum += (val = (i->buf_len[1] << AR_BufLen_S) & AR_BufLen);
59 	WRITE_ONCE(ads->ctl5, val);
60 	checksum += (val = (i->buf_len[2] << AR_BufLen_S) & AR_BufLen);
61 	WRITE_ONCE(ads->ctl7, val);
62 	checksum += (val = (i->buf_len[3] << AR_BufLen_S) & AR_BufLen);
63 	WRITE_ONCE(ads->ctl9, val);
64 
65 	checksum = (u16) (((checksum & 0xffff) + (checksum >> 16)) & 0xffff);
66 	WRITE_ONCE(ads->ctl10, checksum);
67 
68 	if (i->is_first || i->is_last) {
69 		WRITE_ONCE(ads->ctl13, set11nTries(i->rates, 0)
70 			| set11nTries(i->rates, 1)
71 			| set11nTries(i->rates, 2)
72 			| set11nTries(i->rates, 3)
73 			| (i->dur_update ? AR_DurUpdateEna : 0)
74 			| SM(0, AR_BurstDur));
75 
76 		WRITE_ONCE(ads->ctl14, set11nRate(i->rates, 0)
77 			| set11nRate(i->rates, 1)
78 			| set11nRate(i->rates, 2)
79 			| set11nRate(i->rates, 3));
80 	} else {
81 		WRITE_ONCE(ads->ctl13, 0);
82 		WRITE_ONCE(ads->ctl14, 0);
83 	}
84 
85 	ads->ctl20 = 0;
86 	ads->ctl21 = 0;
87 	ads->ctl22 = 0;
88 	ads->ctl23 = 0;
89 
90 	ctl17 = SM(i->keytype, AR_EncrType);
91 	if (!i->is_first) {
92 		WRITE_ONCE(ads->ctl11, 0);
93 		WRITE_ONCE(ads->ctl12, i->is_last ? 0 : AR_TxMore);
94 		WRITE_ONCE(ads->ctl15, 0);
95 		WRITE_ONCE(ads->ctl16, 0);
96 		WRITE_ONCE(ads->ctl17, ctl17);
97 		WRITE_ONCE(ads->ctl18, 0);
98 		WRITE_ONCE(ads->ctl19, 0);
99 		return;
100 	}
101 
102 	WRITE_ONCE(ads->ctl11, (i->pkt_len & AR_FrameLen)
103 		| (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
104 		| SM(i->txpower[0], AR_XmitPower0)
105 		| (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
106 		| (i->keyix != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
107 		| (i->flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0)
108 		| (i->flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
109 		| (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable :
110 		   (i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0)));
111 
112 	ctl12 = (i->keyix != ATH9K_TXKEYIX_INVALID ?
113 		 SM(i->keyix, AR_DestIdx) : 0)
114 		| SM(i->type, AR_FrameType)
115 		| (i->flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
116 		| (i->flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
117 		| (i->flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
118 
119 	ctl17 |= (i->flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
120 	switch (i->aggr) {
121 	case AGGR_BUF_FIRST:
122 		ctl17 |= SM(i->aggr_len, AR_AggrLen);
123 		fallthrough;
124 	case AGGR_BUF_MIDDLE:
125 		ctl12 |= AR_IsAggr | AR_MoreAggr;
126 		ctl17 |= SM(i->ndelim, AR_PadDelim);
127 		break;
128 	case AGGR_BUF_LAST:
129 		ctl12 |= AR_IsAggr;
130 		break;
131 	case AGGR_BUF_NONE:
132 		break;
133 	}
134 
135 	val = (i->flags & ATH9K_TXDESC_PAPRD) >> ATH9K_TXDESC_PAPRD_S;
136 	ctl12 |= SM(val, AR_PAPRDChainMask);
137 
138 	WRITE_ONCE(ads->ctl12, ctl12);
139 	WRITE_ONCE(ads->ctl17, ctl17);
140 
141 	WRITE_ONCE(ads->ctl15, set11nPktDurRTSCTS(i->rates, 0)
142 		| set11nPktDurRTSCTS(i->rates, 1));
143 
144 	WRITE_ONCE(ads->ctl16, set11nPktDurRTSCTS(i->rates, 2)
145 		| set11nPktDurRTSCTS(i->rates, 3));
146 
147 	WRITE_ONCE(ads->ctl18,
148 		  set11nRateFlags(i->rates, 0) | set11nChainSel(i->rates, 0)
149 		| set11nRateFlags(i->rates, 1) | set11nChainSel(i->rates, 1)
150 		| set11nRateFlags(i->rates, 2) | set11nChainSel(i->rates, 2)
151 		| set11nRateFlags(i->rates, 3) | set11nChainSel(i->rates, 3)
152 		| SM(i->rtscts_rate, AR_RTSCTSRate));
153 
154 	WRITE_ONCE(ads->ctl19, AR_Not_Sounding);
155 
156 	WRITE_ONCE(ads->ctl20, SM(i->txpower[1], AR_XmitPower1));
157 	WRITE_ONCE(ads->ctl21, SM(i->txpower[2], AR_XmitPower2));
158 	WRITE_ONCE(ads->ctl22, SM(i->txpower[3], AR_XmitPower3));
159 }
160 
161 static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
162 {
163 	int checksum;
164 
165 	checksum = ads->info + ads->link
166 		+ ads->data0 + ads->ctl3
167 		+ ads->data1 + ads->ctl5
168 		+ ads->data2 + ads->ctl7
169 		+ ads->data3 + ads->ctl9;
170 
171 	return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
172 }
173 
174 static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
175 {
176 	struct ar9003_txc *ads = ds;
177 
178 	ads->link = ds_link;
179 	ads->ctl10 &= ~AR_TxPtrChkSum;
180 	ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
181 }
182 
183 static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked,
184 			      u32 *sync_cause_p)
185 {
186 	u32 isr = 0;
187 	u32 mask2 = 0;
188 	struct ath9k_hw_capabilities *pCap = &ah->caps;
189 	struct ath_common *common = ath9k_hw_common(ah);
190 	u32 sync_cause = 0, async_cause, async_mask = AR_INTR_MAC_IRQ;
191 	bool fatal_int;
192 
193 	if (ath9k_hw_mci_is_enabled(ah))
194 		async_mask |= AR_INTR_ASYNC_MASK_MCI;
195 
196 	async_cause = REG_READ(ah, AR_INTR_ASYNC_CAUSE(ah));
197 
198 	if (async_cause & async_mask) {
199 		if ((REG_READ(ah, AR_RTC_STATUS(ah)) & AR_RTC_STATUS_M(ah))
200 				== AR_RTC_STATUS_ON)
201 			isr = REG_READ(ah, AR_ISR);
202 	}
203 
204 
205 	sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE(ah)) & AR_INTR_SYNC_DEFAULT;
206 
207 	*masked = 0;
208 
209 	if (!isr && !sync_cause && !async_cause)
210 		return false;
211 
212 	if (isr) {
213 		if (isr & AR_ISR_BCNMISC) {
214 			u32 isr2;
215 			isr2 = REG_READ(ah, AR_ISR_S2);
216 
217 			mask2 |= ((isr2 & AR_ISR_S2_TIM) >>
218 				  MAP_ISR_S2_TIM);
219 			mask2 |= ((isr2 & AR_ISR_S2_DTIM) >>
220 				  MAP_ISR_S2_DTIM);
221 			mask2 |= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
222 				  MAP_ISR_S2_DTIMSYNC);
223 			mask2 |= ((isr2 & AR_ISR_S2_CABEND) >>
224 				  MAP_ISR_S2_CABEND);
225 			mask2 |= ((isr2 & AR_ISR_S2_GTT) <<
226 				  MAP_ISR_S2_GTT);
227 			mask2 |= ((isr2 & AR_ISR_S2_CST) <<
228 				  MAP_ISR_S2_CST);
229 			mask2 |= ((isr2 & AR_ISR_S2_TSFOOR) >>
230 				  MAP_ISR_S2_TSFOOR);
231 			mask2 |= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
232 				  MAP_ISR_S2_BB_WATCHDOG);
233 
234 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
235 				REG_WRITE(ah, AR_ISR_S2, isr2);
236 				isr &= ~AR_ISR_BCNMISC;
237 			}
238 		}
239 
240 		if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
241 			isr = REG_READ(ah, AR_ISR_RAC);
242 
243 		if (isr == 0xffffffff) {
244 			*masked = 0;
245 			return false;
246 		}
247 
248 		*masked = isr & ATH9K_INT_COMMON;
249 
250 		if (ah->config.rx_intr_mitigation)
251 			if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM))
252 				*masked |= ATH9K_INT_RXLP;
253 
254 		if (ah->config.tx_intr_mitigation)
255 			if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM))
256 				*masked |= ATH9K_INT_TX;
257 
258 		if (isr & (AR_ISR_LP_RXOK | AR_ISR_RXERR))
259 			*masked |= ATH9K_INT_RXLP;
260 
261 		if (isr & AR_ISR_HP_RXOK)
262 			*masked |= ATH9K_INT_RXHP;
263 
264 		if (isr & (AR_ISR_TXOK | AR_ISR_TXERR | AR_ISR_TXEOL)) {
265 			*masked |= ATH9K_INT_TX;
266 
267 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
268 				u32 s0, s1;
269 				s0 = REG_READ(ah, AR_ISR_S0);
270 				REG_WRITE(ah, AR_ISR_S0, s0);
271 				s1 = REG_READ(ah, AR_ISR_S1);
272 				REG_WRITE(ah, AR_ISR_S1, s1);
273 
274 				isr &= ~(AR_ISR_TXOK | AR_ISR_TXERR |
275 					 AR_ISR_TXEOL);
276 			}
277 		}
278 
279 		if (isr & AR_ISR_GENTMR) {
280 			u32 s5;
281 
282 			if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
283 				s5 = REG_READ(ah, AR_ISR_S5_S(ah));
284 			else
285 				s5 = REG_READ(ah, AR_ISR_S5);
286 
287 			ah->intr_gen_timer_trigger =
288 				MS(s5, AR_ISR_S5_GENTIMER_TRIG);
289 
290 			ah->intr_gen_timer_thresh =
291 				MS(s5, AR_ISR_S5_GENTIMER_THRESH);
292 
293 			if (ah->intr_gen_timer_trigger)
294 				*masked |= ATH9K_INT_GENTIMER;
295 
296 			if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
297 				REG_WRITE(ah, AR_ISR_S5, s5);
298 				isr &= ~AR_ISR_GENTMR;
299 			}
300 
301 		}
302 
303 		*masked |= mask2;
304 
305 		if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
306 			REG_WRITE(ah, AR_ISR, isr);
307 
308 			(void) REG_READ(ah, AR_ISR);
309 		}
310 
311 		if (*masked & ATH9K_INT_BB_WATCHDOG)
312 			ar9003_hw_bb_watchdog_read(ah);
313 	}
314 
315 	if (async_cause & AR_INTR_ASYNC_MASK_MCI)
316 		ar9003_mci_get_isr(ah, masked);
317 
318 	if (sync_cause) {
319 		if (sync_cause_p)
320 			*sync_cause_p = sync_cause;
321 		fatal_int =
322 			(sync_cause &
323 			 (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR))
324 			? true : false;
325 
326 		if (fatal_int) {
327 			if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) {
328 				ath_dbg(common, ANY,
329 					"received PCI FATAL interrupt\n");
330 			}
331 			if (sync_cause & AR_INTR_SYNC_HOST1_PERR) {
332 				ath_dbg(common, ANY,
333 					"received PCI PERR interrupt\n");
334 			}
335 			*masked |= ATH9K_INT_FATAL;
336 		}
337 
338 		if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
339 			REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
340 			REG_WRITE(ah, AR_RC, 0);
341 			*masked |= ATH9K_INT_FATAL;
342 		}
343 
344 		if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
345 			ath_dbg(common, INTERRUPT,
346 				"AR_INTR_SYNC_LOCAL_TIMEOUT\n");
347 
348 		REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR(ah), sync_cause);
349 		(void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR(ah));
350 
351 	}
352 	return true;
353 }
354 
355 static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
356 				 struct ath_tx_status *ts)
357 {
358 	struct ar9003_txs *ads;
359 	u32 status;
360 
361 	ads = &ah->ts_ring[ah->ts_tail];
362 
363 	status = READ_ONCE(ads->status8);
364 	if ((status & AR_TxDone) == 0)
365 		return -EINPROGRESS;
366 
367 	ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
368 
369 	if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
370 	    (MS(ads->ds_info, AR_TxRxDesc) != 1)) {
371 		ath_dbg(ath9k_hw_common(ah), XMIT,
372 			"Tx Descriptor error %x\n", ads->ds_info);
373 		memset(ads, 0, sizeof(*ads));
374 		return -EIO;
375 	}
376 
377 	ts->ts_rateindex = MS(status, AR_FinalTxIdx);
378 	ts->ts_seqnum = MS(status, AR_SeqNum);
379 	ts->tid = MS(status, AR_TxTid);
380 
381 	ts->qid = MS(ads->ds_info, AR_TxQcuNum);
382 	ts->desc_id = MS(ads->status1, AR_TxDescId);
383 	ts->ts_tstamp = ads->status4;
384 	ts->ts_status = 0;
385 	ts->ts_flags  = 0;
386 
387 	if (status & AR_TxOpExceeded)
388 		ts->ts_status |= ATH9K_TXERR_XTXOP;
389 	status = READ_ONCE(ads->status2);
390 	ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
391 	ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
392 	ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
393 	if (status & AR_TxBaStatus) {
394 		ts->ts_flags |= ATH9K_TX_BA;
395 		ts->ba_low = ads->status5;
396 		ts->ba_high = ads->status6;
397 	}
398 
399 	status = READ_ONCE(ads->status3);
400 	if (status & AR_ExcessiveRetries)
401 		ts->ts_status |= ATH9K_TXERR_XRETRY;
402 	if (status & AR_Filtered)
403 		ts->ts_status |= ATH9K_TXERR_FILT;
404 	if (status & AR_FIFOUnderrun) {
405 		ts->ts_status |= ATH9K_TXERR_FIFO;
406 		ath9k_hw_updatetxtriglevel(ah, true);
407 	}
408 	if (status & AR_TxTimerExpired)
409 		ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
410 	if (status & AR_DescCfgErr)
411 		ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
412 	if (status & AR_TxDataUnderrun) {
413 		ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
414 		ath9k_hw_updatetxtriglevel(ah, true);
415 	}
416 	if (status & AR_TxDelimUnderrun) {
417 		ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
418 		ath9k_hw_updatetxtriglevel(ah, true);
419 	}
420 	ts->ts_shortretry = MS(status, AR_RTSFailCnt);
421 	ts->ts_longretry = MS(status, AR_DataFailCnt);
422 	ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
423 
424 	status = READ_ONCE(ads->status7);
425 	ts->ts_rssi = MS(status, AR_TxRSSICombined);
426 	ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
427 	ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
428 	ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
429 
430 	memset(ads, 0, sizeof(*ads));
431 
432 	return 0;
433 }
434 
435 static int ar9003_hw_get_duration(struct ath_hw *ah, const void *ds, int index)
436 {
437 	const struct ar9003_txc *adc = ds;
438 
439 	switch (index) {
440 	case 0:
441 		return MS(READ_ONCE(adc->ctl15), AR_PacketDur0);
442 	case 1:
443 		return MS(READ_ONCE(adc->ctl15), AR_PacketDur1);
444 	case 2:
445 		return MS(READ_ONCE(adc->ctl16), AR_PacketDur2);
446 	case 3:
447 		return MS(READ_ONCE(adc->ctl16), AR_PacketDur3);
448 	default:
449 		return 0;
450 	}
451 }
452 
453 void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
454 {
455 	struct ath_hw_ops *ops = ath9k_hw_ops(hw);
456 
457 	ops->rx_enable = ar9003_hw_rx_enable;
458 	ops->set_desc_link = ar9003_hw_set_desc_link;
459 	ops->get_isr = ar9003_hw_get_isr;
460 	ops->set_txdesc = ar9003_set_txdesc;
461 	ops->proc_txdesc = ar9003_hw_proc_txdesc;
462 	ops->get_duration = ar9003_hw_get_duration;
463 }
464 
465 void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
466 {
467 	REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
468 }
469 EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);
470 
471 void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
472 			    enum ath9k_rx_qtype qtype)
473 {
474 	if (qtype == ATH9K_RX_QUEUE_HP)
475 		REG_WRITE(ah, AR_HP_RXDP, rxdp);
476 	else
477 		REG_WRITE(ah, AR_LP_RXDP, rxdp);
478 }
479 EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);
480 
481 int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
482 				 void *buf_addr)
483 {
484 	struct ar9003_rxs *rxsp = buf_addr;
485 	unsigned int phyerr;
486 
487 	if ((rxsp->status11 & AR_RxDone) == 0)
488 		return -EINPROGRESS;
489 
490 	if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
491 		return -EINVAL;
492 
493 	if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0)
494 		return -EINPROGRESS;
495 
496 	rxs->rs_status = 0;
497 	rxs->rs_flags =  0;
498 	rxs->enc_flags = 0;
499 	rxs->bw = RATE_INFO_BW_20;
500 
501 	rxs->rs_datalen = rxsp->status2 & AR_DataLen;
502 	rxs->rs_tstamp =  rxsp->status3;
503 
504 	/* XXX: Keycache */
505 	rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
506 	rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
507 	rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
508 	rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
509 	rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
510 	rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
511 	rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
512 
513 	if (rxsp->status11 & AR_RxKeyIdxValid)
514 		rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
515 	else
516 		rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;
517 
518 	rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
519 	rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;
520 
521 	rxs->rs_firstaggr = (rxsp->status11 & AR_RxFirstAggr) ? 1 : 0;
522 	rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
523 	rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
524 	rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
525 	rxs->enc_flags |= (rxsp->status4 & AR_GI) ? RX_ENC_FLAG_SHORT_GI : 0;
526 	rxs->enc_flags |=
527 		(rxsp->status4 & AR_STBC) ? (1 << RX_ENC_FLAG_STBC_SHIFT) : 0;
528 	rxs->bw = (rxsp->status4 & AR_2040) ? RATE_INFO_BW_40 : RATE_INFO_BW_20;
529 
530 	rxs->evm0 = rxsp->status6;
531 	rxs->evm1 = rxsp->status7;
532 	rxs->evm2 = rxsp->status8;
533 	rxs->evm3 = rxsp->status9;
534 	rxs->evm4 = (rxsp->status10 & 0xffff);
535 
536 	if (rxsp->status11 & AR_PreDelimCRCErr)
537 		rxs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
538 
539 	if (rxsp->status11 & AR_PostDelimCRCErr)
540 		rxs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
541 
542 	if (rxsp->status11 & AR_DecryptBusyErr)
543 		rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
544 
545 	if ((rxsp->status11 & AR_RxFrameOK) == 0) {
546 		/*
547 		 * AR_CRCErr will bet set to true if we're on the last
548 		 * subframe and the AR_PostDelimCRCErr is caught.
549 		 * In a way this also gives us a guarantee that when
550 		 * (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
551 		 * possibly be reviewing the last subframe. AR_CRCErr
552 		 * is the CRC of the actual data.
553 		 */
554 		if (rxsp->status11 & AR_CRCErr)
555 			rxs->rs_status |= ATH9K_RXERR_CRC;
556 		else if (rxsp->status11 & AR_DecryptCRCErr)
557 			rxs->rs_status |= ATH9K_RXERR_DECRYPT;
558 		else if (rxsp->status11 & AR_MichaelErr)
559 			rxs->rs_status |= ATH9K_RXERR_MIC;
560 		if (rxsp->status11 & AR_PHYErr) {
561 			phyerr = MS(rxsp->status11, AR_PHYErrCode);
562 			/*
563 			 * If we reach a point here where AR_PostDelimCRCErr is
564 			 * true it implies we're *not* on the last subframe. In
565 			 * in that case that we know already that the CRC of
566 			 * the frame was OK, and MAC would send an ACK for that
567 			 * subframe, even if we did get a phy error of type
568 			 * ATH9K_PHYERR_OFDM_RESTART. This is only applicable
569 			 * to frame that are prior to the last subframe.
570 			 * The AR_PostDelimCRCErr is the CRC for the MPDU
571 			 * delimiter, which contains the 4 reserved bits,
572 			 * the MPDU length (12 bits), and follows the MPDU
573 			 * delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
574 			 */
575 			if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
576 			    (rxsp->status11 & AR_PostDelimCRCErr)) {
577 				rxs->rs_phyerr = 0;
578 			} else {
579 				rxs->rs_status |= ATH9K_RXERR_PHY;
580 				rxs->rs_phyerr = phyerr;
581 			}
582 		}
583 	}
584 
585 	if (rxsp->status11 & AR_KeyMiss)
586 		rxs->rs_status |= ATH9K_RXERR_KEYMISS;
587 
588 	return 0;
589 }
590 EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
591 
592 void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
593 {
594 	ah->ts_tail = 0;
595 
596 	memset((void *) ah->ts_ring, 0,
597 		ah->ts_size * sizeof(struct ar9003_txs));
598 
599 	ath_dbg(ath9k_hw_common(ah), XMIT,
600 		"TS Start 0x%x End 0x%x Virt %p, Size %d\n",
601 		ah->ts_paddr_start, ah->ts_paddr_end,
602 		ah->ts_ring, ah->ts_size);
603 
604 	REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
605 	REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
606 }
607 
608 void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
609 			       u32 ts_paddr_start,
610 			       u16 size)
611 {
612 
613 	ah->ts_paddr_start = ts_paddr_start;
614 	ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
615 	ah->ts_size = size;
616 	ah->ts_ring = ts_start;
617 
618 	ath9k_hw_reset_txstatus_ring(ah);
619 }
620 EXPORT_SYMBOL(ath9k_hw_setup_statusring);
621