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cris: add arch/cris/include/asm/serial.h
[linux-2.6/next.git] / drivers / net / wireless / ath / ath9k / ar9003_mac.c
blob8ff0b88a29b9ab4c436870ad3ea6d2d09b030f67
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 "hw.h"
17 #include "ar9003_mac.h"
18
19 static void ar9003_hw_rx_enable(struct ath_hw *hw)
20 {
21 REG_WRITE(hw, AR_CR, 0);
22 }
23
24 static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
25 {
26 int checksum;
27
28 checksum = ads->info + ads->link
29 + ads->data0 + ads->ctl3
30 + ads->data1 + ads->ctl5
31 + ads->data2 + ads->ctl7
32 + ads->data3 + ads->ctl9;
33
34 return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
35 }
36
37 static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
38 {
39 struct ar9003_txc *ads = ds;
40
41 ads->link = ds_link;
42 ads->ctl10 &= ~AR_TxPtrChkSum;
43 ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
44 }
45
46 static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
47 {
48 u32 isr = 0;
49 u32 mask2 = 0;
50 struct ath9k_hw_capabilities *pCap = &ah->caps;
51 u32 sync_cause = 0;
52 struct ath_common *common = ath9k_hw_common(ah);
53
54 if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) {
55 if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
56 == AR_RTC_STATUS_ON)
57 isr = REG_READ(ah, AR_ISR);
58 }
59
60 sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;
61
62 *masked = 0;
63
64 if (!isr && !sync_cause)
65 return false;
66
67 if (isr) {
68 if (isr & AR_ISR_BCNMISC) {
69 u32 isr2;
70 isr2 = REG_READ(ah, AR_ISR_S2);
71
72 mask2 |= ((isr2 & AR_ISR_S2_TIM) >>
73 MAP_ISR_S2_TIM);
74 mask2 |= ((isr2 & AR_ISR_S2_DTIM) >>
75 MAP_ISR_S2_DTIM);
76 mask2 |= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
77 MAP_ISR_S2_DTIMSYNC);
78 mask2 |= ((isr2 & AR_ISR_S2_CABEND) >>
79 MAP_ISR_S2_CABEND);
80 mask2 |= ((isr2 & AR_ISR_S2_GTT) <<
81 MAP_ISR_S2_GTT);
82 mask2 |= ((isr2 & AR_ISR_S2_CST) <<
83 MAP_ISR_S2_CST);
84 mask2 |= ((isr2 & AR_ISR_S2_TSFOOR) >>
85 MAP_ISR_S2_TSFOOR);
86 mask2 |= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
87 MAP_ISR_S2_BB_WATCHDOG);
88
89 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
90 REG_WRITE(ah, AR_ISR_S2, isr2);
91 isr &= ~AR_ISR_BCNMISC;
92 }
93 }
94
95 if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
96 isr = REG_READ(ah, AR_ISR_RAC);
97
98 if (isr == 0xffffffff) {
99 *masked = 0;
100 return false;
101 }
102
103 *masked = isr & ATH9K_INT_COMMON;
104
105 if (ah->config.rx_intr_mitigation)
106 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM))
107 *masked |= ATH9K_INT_RXLP;
108
109 if (ah->config.tx_intr_mitigation)
110 if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM))
111 *masked |= ATH9K_INT_TX;
112
113 if (isr & (AR_ISR_LP_RXOK | AR_ISR_RXERR))
114 *masked |= ATH9K_INT_RXLP;
115
116 if (isr & AR_ISR_HP_RXOK)
117 *masked |= ATH9K_INT_RXHP;
118
119 if (isr & (AR_ISR_TXOK | AR_ISR_TXERR | AR_ISR_TXEOL)) {
120 *masked |= ATH9K_INT_TX;
121
122 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
123 u32 s0, s1;
124 s0 = REG_READ(ah, AR_ISR_S0);
125 REG_WRITE(ah, AR_ISR_S0, s0);
126 s1 = REG_READ(ah, AR_ISR_S1);
127 REG_WRITE(ah, AR_ISR_S1, s1);
128
129 isr &= ~(AR_ISR_TXOK | AR_ISR_TXERR |
130 AR_ISR_TXEOL);
131 }
132 }
133
134 if (isr & AR_ISR_GENTMR) {
135 u32 s5;
136
137 if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
138 s5 = REG_READ(ah, AR_ISR_S5_S);
139 else
140 s5 = REG_READ(ah, AR_ISR_S5);
141
142 ah->intr_gen_timer_trigger =
143 MS(s5, AR_ISR_S5_GENTIMER_TRIG);
144
145 ah->intr_gen_timer_thresh =
146 MS(s5, AR_ISR_S5_GENTIMER_THRESH);
147
148 if (ah->intr_gen_timer_trigger)
149 *masked |= ATH9K_INT_GENTIMER;
150
151 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
152 REG_WRITE(ah, AR_ISR_S5, s5);
153 isr &= ~AR_ISR_GENTMR;
154 }
155
156 }
157
158 *masked |= mask2;
159
160 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
161 REG_WRITE(ah, AR_ISR, isr);
162
163 (void) REG_READ(ah, AR_ISR);
164 }
165
166 if (*masked & ATH9K_INT_BB_WATCHDOG)
167 ar9003_hw_bb_watchdog_read(ah);
168 }
169
170 if (sync_cause) {
171 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
172 REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
173 REG_WRITE(ah, AR_RC, 0);
174 *masked |= ATH9K_INT_FATAL;
175 }
176
177 if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
178 ath_dbg(common, ATH_DBG_INTERRUPT,
179 "AR_INTR_SYNC_LOCAL_TIMEOUT\n");
180
181 REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
182 (void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);
183
184 }
185 return true;
186 }
187
188 static void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,
189 bool is_firstseg, bool is_lastseg,
190 const void *ds0, dma_addr_t buf_addr,
191 unsigned int qcu)
192 {
193 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
194 unsigned int descid = 0;
195
196 ads->info = (ATHEROS_VENDOR_ID << AR_DescId_S) |
197 (1 << AR_TxRxDesc_S) |
198 (1 << AR_CtrlStat_S) |
199 (qcu << AR_TxQcuNum_S) | 0x17;
200
201 ads->data0 = buf_addr;
202 ads->data1 = 0;
203 ads->data2 = 0;
204 ads->data3 = 0;
205
206 ads->ctl3 = (seglen << AR_BufLen_S);
207 ads->ctl3 &= AR_BufLen;
208
209 /* Fill in pointer checksum and descriptor id */
210 ads->ctl10 = ar9003_calc_ptr_chksum(ads);
211 ads->ctl10 |= (descid << AR_TxDescId_S);
212
213 if (is_firstseg) {
214 ads->ctl12 |= (is_lastseg ? 0 : AR_TxMore);
215 } else if (is_lastseg) {
216 ads->ctl11 = 0;
217 ads->ctl12 = 0;
218 ads->ctl13 = AR9003TXC_CONST(ds0)->ctl13;
219 ads->ctl14 = AR9003TXC_CONST(ds0)->ctl14;
220 } else {
221 /* XXX Intermediate descriptor in a multi-descriptor frame.*/
222 ads->ctl11 = 0;
223 ads->ctl12 = AR_TxMore;
224 ads->ctl13 = 0;
225 ads->ctl14 = 0;
226 }
227 }
228
229 static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
230 struct ath_tx_status *ts)
231 {
232 struct ar9003_txc *txc = (struct ar9003_txc *) ds;
233 struct ar9003_txs *ads;
234 u32 status;
235
236 ads = &ah->ts_ring[ah->ts_tail];
237
238 status = ACCESS_ONCE(ads->status8);
239 if ((status & AR_TxDone) == 0)
240 return -EINPROGRESS;
241
242 ts->qid = MS(ads->ds_info, AR_TxQcuNum);
243 if (!txc || (MS(txc->info, AR_TxQcuNum) == ts->qid))
244 ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
245 else
246 return -ENOENT;
247
248 if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
249 (MS(ads->ds_info, AR_TxRxDesc) != 1)) {
250 ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
251 "Tx Descriptor error %x\n", ads->ds_info);
252 memset(ads, 0, sizeof(*ads));
253 return -EIO;
254 }
255
256 if (status & AR_TxOpExceeded)
257 ts->ts_status |= ATH9K_TXERR_XTXOP;
258 ts->ts_rateindex = MS(status, AR_FinalTxIdx);
259 ts->ts_seqnum = MS(status, AR_SeqNum);
260 ts->tid = MS(status, AR_TxTid);
261
262 ts->desc_id = MS(ads->status1, AR_TxDescId);
263 ts->ts_tstamp = ads->status4;
264 ts->ts_status = 0;
265 ts->ts_flags = 0;
266
267 status = ACCESS_ONCE(ads->status2);
268 ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
269 ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
270 ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
271 if (status & AR_TxBaStatus) {
272 ts->ts_flags |= ATH9K_TX_BA;
273 ts->ba_low = ads->status5;
274 ts->ba_high = ads->status6;
275 }
276
277 status = ACCESS_ONCE(ads->status3);
278 if (status & AR_ExcessiveRetries)
279 ts->ts_status |= ATH9K_TXERR_XRETRY;
280 if (status & AR_Filtered)
281 ts->ts_status |= ATH9K_TXERR_FILT;
282 if (status & AR_FIFOUnderrun) {
283 ts->ts_status |= ATH9K_TXERR_FIFO;
284 ath9k_hw_updatetxtriglevel(ah, true);
285 }
286 if (status & AR_TxTimerExpired)
287 ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
288 if (status & AR_DescCfgErr)
289 ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
290 if (status & AR_TxDataUnderrun) {
291 ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
292 ath9k_hw_updatetxtriglevel(ah, true);
293 }
294 if (status & AR_TxDelimUnderrun) {
295 ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
296 ath9k_hw_updatetxtriglevel(ah, true);
297 }
298 ts->ts_shortretry = MS(status, AR_RTSFailCnt);
299 ts->ts_longretry = MS(status, AR_DataFailCnt);
300 ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
301
302 status = ACCESS_ONCE(ads->status7);
303 ts->ts_rssi = MS(status, AR_TxRSSICombined);
304 ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
305 ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
306 ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
307
308 memset(ads, 0, sizeof(*ads));
309
310 return 0;
311 }
312
313 static void ar9003_hw_set11n_txdesc(struct ath_hw *ah, void *ds,
314 u32 pktlen, enum ath9k_pkt_type type, u32 txpower,
315 u32 keyIx, enum ath9k_key_type keyType, u32 flags)
316 {
317 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
318
319 if (txpower > ah->txpower_limit)
320 txpower = ah->txpower_limit;
321
322 if (txpower > 63)
323 txpower = 63;
324
325 ads->ctl11 = (pktlen & AR_FrameLen)
326 | (flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
327 | SM(txpower, AR_XmitPower)
328 | (flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
329 | (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
330 | (flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0);
331
332 ads->ctl12 =
333 (keyIx != ATH9K_TXKEYIX_INVALID ? SM(keyIx, AR_DestIdx) : 0)
334 | SM(type, AR_FrameType)
335 | (flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
336 | (flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
337 | (flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
338
339 ads->ctl17 = SM(keyType, AR_EncrType) |
340 (flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
341 ads->ctl18 = 0;
342 ads->ctl19 = AR_Not_Sounding;
343
344 ads->ctl20 = 0;
345 ads->ctl21 = 0;
346 ads->ctl22 = 0;
347 }
348
349 static void ar9003_hw_set_clrdmask(struct ath_hw *ah, void *ds, bool val)
350 {
351 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
352
353 if (val)
354 ads->ctl11 |= AR_ClrDestMask;
355 else
356 ads->ctl11 &= ~AR_ClrDestMask;
357 }
358
359 static void ar9003_hw_set11n_ratescenario(struct ath_hw *ah, void *ds,
360 void *lastds,
361 u32 durUpdateEn, u32 rtsctsRate,
362 u32 rtsctsDuration,
363 struct ath9k_11n_rate_series series[],
364 u32 nseries, u32 flags)
365 {
366 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
367 struct ar9003_txc *last_ads = (struct ar9003_txc *) lastds;
368 u_int32_t ctl11;
369
370 if (flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)) {
371 ctl11 = ads->ctl11;
372
373 if (flags & ATH9K_TXDESC_RTSENA) {
374 ctl11 &= ~AR_CTSEnable;
375 ctl11 |= AR_RTSEnable;
376 } else {
377 ctl11 &= ~AR_RTSEnable;
378 ctl11 |= AR_CTSEnable;
379 }
380
381 ads->ctl11 = ctl11;
382 } else {
383 ads->ctl11 = (ads->ctl11 & ~(AR_RTSEnable | AR_CTSEnable));
384 }
385
386 ads->ctl13 = set11nTries(series, 0)
387 | set11nTries(series, 1)
388 | set11nTries(series, 2)
389 | set11nTries(series, 3)
390 | (durUpdateEn ? AR_DurUpdateEna : 0)
391 | SM(0, AR_BurstDur);
392
393 ads->ctl14 = set11nRate(series, 0)
394 | set11nRate(series, 1)
395 | set11nRate(series, 2)
396 | set11nRate(series, 3);
397
398 ads->ctl15 = set11nPktDurRTSCTS(series, 0)
399 | set11nPktDurRTSCTS(series, 1);
400
401 ads->ctl16 = set11nPktDurRTSCTS(series, 2)
402 | set11nPktDurRTSCTS(series, 3);
403
404 ads->ctl18 = set11nRateFlags(series, 0)
405 | set11nRateFlags(series, 1)
406 | set11nRateFlags(series, 2)
407 | set11nRateFlags(series, 3)
408 | SM(rtsctsRate, AR_RTSCTSRate);
409 ads->ctl19 = AR_Not_Sounding;
410
411 last_ads->ctl13 = ads->ctl13;
412 last_ads->ctl14 = ads->ctl14;
413 }
414
415 static void ar9003_hw_set11n_aggr_first(struct ath_hw *ah, void *ds,
416 u32 aggrLen)
417 {
418 #define FIRST_DESC_NDELIMS 60
419 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
420
421 ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
422
423 if (ah->ent_mode & AR_ENT_OTP_MPSD) {
424 u32 ctl17, ndelim;
425 /*
426 * Add delimiter when using RTS/CTS with aggregation
427 * and non enterprise AR9003 card
428 */
429 ctl17 = ads->ctl17;
430 ndelim = MS(ctl17, AR_PadDelim);
431
432 if (ndelim < FIRST_DESC_NDELIMS) {
433 aggrLen += (FIRST_DESC_NDELIMS - ndelim) * 4;
434 ndelim = FIRST_DESC_NDELIMS;
435 }
436
437 ctl17 &= ~AR_AggrLen;
438 ctl17 |= SM(aggrLen, AR_AggrLen);
439
440 ctl17 &= ~AR_PadDelim;
441 ctl17 |= SM(ndelim, AR_PadDelim);
442
443 ads->ctl17 = ctl17;
444 } else {
445 ads->ctl17 &= ~AR_AggrLen;
446 ads->ctl17 |= SM(aggrLen, AR_AggrLen);
447 }
448 }
449
450 static void ar9003_hw_set11n_aggr_middle(struct ath_hw *ah, void *ds,
451 u32 numDelims)
452 {
453 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
454 unsigned int ctl17;
455
456 ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
457
458 /*
459 * We use a stack variable to manipulate ctl6 to reduce uncached
460 * read modify, modfiy, write.
461 */
462 ctl17 = ads->ctl17;
463 ctl17 &= ~AR_PadDelim;
464 ctl17 |= SM(numDelims, AR_PadDelim);
465 ads->ctl17 = ctl17;
466 }
467
468 static void ar9003_hw_set11n_aggr_last(struct ath_hw *ah, void *ds)
469 {
470 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
471
472 ads->ctl12 |= AR_IsAggr;
473 ads->ctl12 &= ~AR_MoreAggr;
474 ads->ctl17 &= ~AR_PadDelim;
475 }
476
477 static void ar9003_hw_clr11n_aggr(struct ath_hw *ah, void *ds)
478 {
479 struct ar9003_txc *ads = (struct ar9003_txc *) ds;
480
481 ads->ctl12 &= (~AR_IsAggr & ~AR_MoreAggr);
482 }
483
484 void ar9003_hw_set_paprd_txdesc(struct ath_hw *ah, void *ds, u8 chains)
485 {
486 struct ar9003_txc *ads = ds;
487
488 ads->ctl12 |= SM(chains, AR_PAPRDChainMask);
489 }
490 EXPORT_SYMBOL(ar9003_hw_set_paprd_txdesc);
491
492 void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
493 {
494 struct ath_hw_ops *ops = ath9k_hw_ops(hw);
495
496 ops->rx_enable = ar9003_hw_rx_enable;
497 ops->set_desc_link = ar9003_hw_set_desc_link;
498 ops->get_isr = ar9003_hw_get_isr;
499 ops->fill_txdesc = ar9003_hw_fill_txdesc;
500 ops->proc_txdesc = ar9003_hw_proc_txdesc;
501 ops->set11n_txdesc = ar9003_hw_set11n_txdesc;
502 ops->set11n_ratescenario = ar9003_hw_set11n_ratescenario;
503 ops->set11n_aggr_first = ar9003_hw_set11n_aggr_first;
504 ops->set11n_aggr_middle = ar9003_hw_set11n_aggr_middle;
505 ops->set11n_aggr_last = ar9003_hw_set11n_aggr_last;
506 ops->clr11n_aggr = ar9003_hw_clr11n_aggr;
507 ops->set_clrdmask = ar9003_hw_set_clrdmask;
508 }
509
510 void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
511 {
512 REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
513 }
514 EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);
515
516 void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
517 enum ath9k_rx_qtype qtype)
518 {
519 if (qtype == ATH9K_RX_QUEUE_HP)
520 REG_WRITE(ah, AR_HP_RXDP, rxdp);
521 else
522 REG_WRITE(ah, AR_LP_RXDP, rxdp);
523 }
524 EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);
525
526 int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
527 void *buf_addr)
528 {
529 struct ar9003_rxs *rxsp = (struct ar9003_rxs *) buf_addr;
530 unsigned int phyerr;
531
532 /* TODO: byte swap on big endian for ar9300_10 */
533
534 if ((rxsp->status11 & AR_RxDone) == 0)
535 return -EINPROGRESS;
536
537 if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
538 return -EINVAL;
539
540 if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0)
541 return -EINPROGRESS;
542
543 if (!rxs)
544 return 0;
545
546 rxs->rs_status = 0;
547 rxs->rs_flags = 0;
548
549 rxs->rs_datalen = rxsp->status2 & AR_DataLen;
550 rxs->rs_tstamp = rxsp->status3;
551
552 /* XXX: Keycache */
553 rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
554 rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
555 rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
556 rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
557 rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
558 rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
559 rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
560
561 if (rxsp->status11 & AR_RxKeyIdxValid)
562 rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
563 else
564 rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;
565
566 rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
567 rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;
568
569 rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
570 rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
571 rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
572 rxs->rs_flags = (rxsp->status4 & AR_GI) ? ATH9K_RX_GI : 0;
573 rxs->rs_flags |= (rxsp->status4 & AR_2040) ? ATH9K_RX_2040 : 0;
574
575 rxs->evm0 = rxsp->status6;
576 rxs->evm1 = rxsp->status7;
577 rxs->evm2 = rxsp->status8;
578 rxs->evm3 = rxsp->status9;
579 rxs->evm4 = (rxsp->status10 & 0xffff);
580
581 if (rxsp->status11 & AR_PreDelimCRCErr)
582 rxs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
583
584 if (rxsp->status11 & AR_PostDelimCRCErr)
585 rxs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
586
587 if (rxsp->status11 & AR_DecryptBusyErr)
588 rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
589
590 if ((rxsp->status11 & AR_RxFrameOK) == 0) {
591 /*
592 * AR_CRCErr will bet set to true if we're on the last
593 * subframe and the AR_PostDelimCRCErr is caught.
594 * In a way this also gives us a guarantee that when
595 * (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
596 * possibly be reviewing the last subframe. AR_CRCErr
597 * is the CRC of the actual data.
598 */
599 if (rxsp->status11 & AR_CRCErr)
600 rxs->rs_status |= ATH9K_RXERR_CRC;
601 else if (rxsp->status11 & AR_PHYErr) {
602 phyerr = MS(rxsp->status11, AR_PHYErrCode);
603 /*
604 * If we reach a point here where AR_PostDelimCRCErr is
605 * true it implies we're *not* on the last subframe. In
606 * in that case that we know already that the CRC of
607 * the frame was OK, and MAC would send an ACK for that
608 * subframe, even if we did get a phy error of type
609 * ATH9K_PHYERR_OFDM_RESTART. This is only applicable
610 * to frame that are prior to the last subframe.
611 * The AR_PostDelimCRCErr is the CRC for the MPDU
612 * delimiter, which contains the 4 reserved bits,
613 * the MPDU length (12 bits), and follows the MPDU
614 * delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
615 */
616 if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
617 (rxsp->status11 & AR_PostDelimCRCErr)) {
618 rxs->rs_phyerr = 0;
619 } else {
620 rxs->rs_status |= ATH9K_RXERR_PHY;
621 rxs->rs_phyerr = phyerr;
622 }
623
624 } else if (rxsp->status11 & AR_DecryptCRCErr)
625 rxs->rs_status |= ATH9K_RXERR_DECRYPT;
626 else if (rxsp->status11 & AR_MichaelErr)
627 rxs->rs_status |= ATH9K_RXERR_MIC;
628 else if (rxsp->status11 & AR_KeyMiss)
629 rxs->rs_status |= ATH9K_RXERR_DECRYPT;
630 }
631
632 return 0;
633 }
634 EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
635
636 void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
637 {
638 ah->ts_tail = 0;
639
640 memset((void *) ah->ts_ring, 0,
641 ah->ts_size * sizeof(struct ar9003_txs));
642
643 ath_dbg(ath9k_hw_common(ah), ATH_DBG_XMIT,
644 "TS Start 0x%x End 0x%x Virt %p, Size %d\n",
645 ah->ts_paddr_start, ah->ts_paddr_end,
646 ah->ts_ring, ah->ts_size);
647
648 REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
649 REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
650 }
651
652 void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
653 u32 ts_paddr_start,
654 u8 size)
655 {
656
657 ah->ts_paddr_start = ts_paddr_start;
658 ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
659 ah->ts_size = size;
660 ah->ts_ring = (struct ar9003_txs *) ts_start;
661
662 ath9k_hw_reset_txstatus_ring(ah);
663 }
664 EXPORT_SYMBOL(ath9k_hw_setup_statusring);
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