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Staging: unisys: Remove RETINT macro
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath9k / ar9003_mac.c
blob729ffbf07343bb72c9313f037cc5965e58d8366f
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 ACCESS_ONCE(ads->info) = val;
43
44 checksum += i->link;
45 ACCESS_ONCE(ads->link) = i->link;
46
47 checksum += i->buf_addr[0];
48 ACCESS_ONCE(ads->data0) = i->buf_addr[0];
49 checksum += i->buf_addr[1];
50 ACCESS_ONCE(ads->data1) = i->buf_addr[1];
51 checksum += i->buf_addr[2];
52 ACCESS_ONCE(ads->data2) = i->buf_addr[2];
53 checksum += i->buf_addr[3];
54 ACCESS_ONCE(ads->data3) = i->buf_addr[3];
55
56 checksum += (val = (i->buf_len[0] << AR_BufLen_S) & AR_BufLen);
57 ACCESS_ONCE(ads->ctl3) = val;
58 checksum += (val = (i->buf_len[1] << AR_BufLen_S) & AR_BufLen);
59 ACCESS_ONCE(ads->ctl5) = val;
60 checksum += (val = (i->buf_len[2] << AR_BufLen_S) & AR_BufLen);
61 ACCESS_ONCE(ads->ctl7) = val;
62 checksum += (val = (i->buf_len[3] << AR_BufLen_S) & AR_BufLen);
63 ACCESS_ONCE(ads->ctl9) = val;
64
65 checksum = (u16) (((checksum & 0xffff) + (checksum >> 16)) & 0xffff);
66 ACCESS_ONCE(ads->ctl10) = checksum;
67
68 if (i->is_first || i->is_last) {
69 ACCESS_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 ACCESS_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 ACCESS_ONCE(ads->ctl13) = 0;
82 ACCESS_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 ACCESS_ONCE(ads->ctl11) = 0;
93 ACCESS_ONCE(ads->ctl12) = i->is_last ? 0 : AR_TxMore;
94 ACCESS_ONCE(ads->ctl15) = 0;
95 ACCESS_ONCE(ads->ctl16) = 0;
96 ACCESS_ONCE(ads->ctl17) = ctl17;
97 ACCESS_ONCE(ads->ctl18) = 0;
98 ACCESS_ONCE(ads->ctl19) = 0;
99 return;
100 }
101
102 ACCESS_ONCE(ads->ctl11) = (i->pkt_len & AR_FrameLen)
103 | (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
104 | SM(i->txpower, AR_XmitPower)
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 /* fall through */
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 ACCESS_ONCE(ads->ctl12) = ctl12;
139 ACCESS_ONCE(ads->ctl17) = ctl17;
140
141 ACCESS_ONCE(ads->ctl15) = set11nPktDurRTSCTS(i->rates, 0)
142 | set11nPktDurRTSCTS(i->rates, 1);
143
144 ACCESS_ONCE(ads->ctl16) = set11nPktDurRTSCTS(i->rates, 2)
145 | set11nPktDurRTSCTS(i->rates, 3);
146
147 ACCESS_ONCE(ads->ctl18) = set11nRateFlags(i->rates, 0)
148 | set11nRateFlags(i->rates, 1)
149 | set11nRateFlags(i->rates, 2)
150 | set11nRateFlags(i->rates, 3)
151 | SM(i->rtscts_rate, AR_RTSCTSRate);
152
153 ACCESS_ONCE(ads->ctl19) = AR_Not_Sounding;
154 }
155
156 static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
157 {
158 int checksum;
159
160 checksum = ads->info + ads->link
161 + ads->data0 + ads->ctl3
162 + ads->data1 + ads->ctl5
163 + ads->data2 + ads->ctl7
164 + ads->data3 + ads->ctl9;
165
166 return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
167 }
168
169 static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
170 {
171 struct ar9003_txc *ads = ds;
172
173 ads->link = ds_link;
174 ads->ctl10 &= ~AR_TxPtrChkSum;
175 ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
176 }
177
178 static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked,
179 u32 *sync_cause_p)
180 {
181 u32 isr = 0;
182 u32 mask2 = 0;
183 struct ath9k_hw_capabilities *pCap = &ah->caps;
184 struct ath_common *common = ath9k_hw_common(ah);
185 u32 sync_cause = 0, async_cause, async_mask = AR_INTR_MAC_IRQ;
186 bool fatal_int;
187
188 if (ath9k_hw_mci_is_enabled(ah))
189 async_mask |= AR_INTR_ASYNC_MASK_MCI;
190
191 async_cause = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
192
193 if (async_cause & async_mask) {
194 if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
195 == AR_RTC_STATUS_ON)
196 isr = REG_READ(ah, AR_ISR);
197 }
198
199
200 sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;
201
202 *masked = 0;
203
204 if (!isr && !sync_cause && !async_cause)
205 return false;
206
207 if (isr) {
208 if (isr & AR_ISR_BCNMISC) {
209 u32 isr2;
210 isr2 = REG_READ(ah, AR_ISR_S2);
211
212 mask2 |= ((isr2 & AR_ISR_S2_TIM) >>
213 MAP_ISR_S2_TIM);
214 mask2 |= ((isr2 & AR_ISR_S2_DTIM) >>
215 MAP_ISR_S2_DTIM);
216 mask2 |= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
217 MAP_ISR_S2_DTIMSYNC);
218 mask2 |= ((isr2 & AR_ISR_S2_CABEND) >>
219 MAP_ISR_S2_CABEND);
220 mask2 |= ((isr2 & AR_ISR_S2_GTT) <<
221 MAP_ISR_S2_GTT);
222 mask2 |= ((isr2 & AR_ISR_S2_CST) <<
223 MAP_ISR_S2_CST);
224 mask2 |= ((isr2 & AR_ISR_S2_TSFOOR) >>
225 MAP_ISR_S2_TSFOOR);
226 mask2 |= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
227 MAP_ISR_S2_BB_WATCHDOG);
228
229 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
230 REG_WRITE(ah, AR_ISR_S2, isr2);
231 isr &= ~AR_ISR_BCNMISC;
232 }
233 }
234
235 if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
236 isr = REG_READ(ah, AR_ISR_RAC);
237
238 if (isr == 0xffffffff) {
239 *masked = 0;
240 return false;
241 }
242
243 *masked = isr & ATH9K_INT_COMMON;
244
245 if (ah->config.rx_intr_mitigation)
246 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM))
247 *masked |= ATH9K_INT_RXLP;
248
249 if (ah->config.tx_intr_mitigation)
250 if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM))
251 *masked |= ATH9K_INT_TX;
252
253 if (isr & (AR_ISR_LP_RXOK | AR_ISR_RXERR))
254 *masked |= ATH9K_INT_RXLP;
255
256 if (isr & AR_ISR_HP_RXOK)
257 *masked |= ATH9K_INT_RXHP;
258
259 if (isr & (AR_ISR_TXOK | AR_ISR_TXERR | AR_ISR_TXEOL)) {
260 *masked |= ATH9K_INT_TX;
261
262 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
263 u32 s0, s1;
264 s0 = REG_READ(ah, AR_ISR_S0);
265 REG_WRITE(ah, AR_ISR_S0, s0);
266 s1 = REG_READ(ah, AR_ISR_S1);
267 REG_WRITE(ah, AR_ISR_S1, s1);
268
269 isr &= ~(AR_ISR_TXOK | AR_ISR_TXERR |
270 AR_ISR_TXEOL);
271 }
272 }
273
274 if (isr & AR_ISR_GENTMR) {
275 u32 s5;
276
277 if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
278 s5 = REG_READ(ah, AR_ISR_S5_S);
279 else
280 s5 = REG_READ(ah, AR_ISR_S5);
281
282 ah->intr_gen_timer_trigger =
283 MS(s5, AR_ISR_S5_GENTIMER_TRIG);
284
285 ah->intr_gen_timer_thresh =
286 MS(s5, AR_ISR_S5_GENTIMER_THRESH);
287
288 if (ah->intr_gen_timer_trigger)
289 *masked |= ATH9K_INT_GENTIMER;
290
291 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
292 REG_WRITE(ah, AR_ISR_S5, s5);
293 isr &= ~AR_ISR_GENTMR;
294 }
295
296 }
297
298 *masked |= mask2;
299
300 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
301 REG_WRITE(ah, AR_ISR, isr);
302
303 (void) REG_READ(ah, AR_ISR);
304 }
305
306 if (*masked & ATH9K_INT_BB_WATCHDOG)
307 ar9003_hw_bb_watchdog_read(ah);
308 }
309
310 if (async_cause & AR_INTR_ASYNC_MASK_MCI)
311 ar9003_mci_get_isr(ah, masked);
312
313 if (sync_cause) {
314 if (sync_cause_p)
315 *sync_cause_p = sync_cause;
316 fatal_int =
317 (sync_cause &
318 (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR))
319 ? true : false;
320
321 if (fatal_int) {
322 if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) {
323 ath_dbg(common, ANY,
324 "received PCI FATAL interrupt\n");
325 }
326 if (sync_cause & AR_INTR_SYNC_HOST1_PERR) {
327 ath_dbg(common, ANY,
328 "received PCI PERR interrupt\n");
329 }
330 *masked |= ATH9K_INT_FATAL;
331 }
332
333 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
334 REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
335 REG_WRITE(ah, AR_RC, 0);
336 *masked |= ATH9K_INT_FATAL;
337 }
338
339 if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
340 ath_dbg(common, INTERRUPT,
341 "AR_INTR_SYNC_LOCAL_TIMEOUT\n");
342
343 REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
344 (void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);
345
346 }
347 return true;
348 }
349
350 static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
351 struct ath_tx_status *ts)
352 {
353 struct ar9003_txs *ads;
354 u32 status;
355
356 ads = &ah->ts_ring[ah->ts_tail];
357
358 status = ACCESS_ONCE(ads->status8);
359 if ((status & AR_TxDone) == 0)
360 return -EINPROGRESS;
361
362 ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
363
364 if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
365 (MS(ads->ds_info, AR_TxRxDesc) != 1)) {
366 ath_dbg(ath9k_hw_common(ah), XMIT,
367 "Tx Descriptor error %x\n", ads->ds_info);
368 memset(ads, 0, sizeof(*ads));
369 return -EIO;
370 }
371
372 ts->ts_rateindex = MS(status, AR_FinalTxIdx);
373 ts->ts_seqnum = MS(status, AR_SeqNum);
374 ts->tid = MS(status, AR_TxTid);
375
376 ts->qid = MS(ads->ds_info, AR_TxQcuNum);
377 ts->desc_id = MS(ads->status1, AR_TxDescId);
378 ts->ts_tstamp = ads->status4;
379 ts->ts_status = 0;
380 ts->ts_flags = 0;
381
382 if (status & AR_TxOpExceeded)
383 ts->ts_status |= ATH9K_TXERR_XTXOP;
384 status = ACCESS_ONCE(ads->status2);
385 ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
386 ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
387 ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
388 if (status & AR_TxBaStatus) {
389 ts->ts_flags |= ATH9K_TX_BA;
390 ts->ba_low = ads->status5;
391 ts->ba_high = ads->status6;
392 }
393
394 status = ACCESS_ONCE(ads->status3);
395 if (status & AR_ExcessiveRetries)
396 ts->ts_status |= ATH9K_TXERR_XRETRY;
397 if (status & AR_Filtered)
398 ts->ts_status |= ATH9K_TXERR_FILT;
399 if (status & AR_FIFOUnderrun) {
400 ts->ts_status |= ATH9K_TXERR_FIFO;
401 ath9k_hw_updatetxtriglevel(ah, true);
402 }
403 if (status & AR_TxTimerExpired)
404 ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
405 if (status & AR_DescCfgErr)
406 ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
407 if (status & AR_TxDataUnderrun) {
408 ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
409 ath9k_hw_updatetxtriglevel(ah, true);
410 }
411 if (status & AR_TxDelimUnderrun) {
412 ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
413 ath9k_hw_updatetxtriglevel(ah, true);
414 }
415 ts->ts_shortretry = MS(status, AR_RTSFailCnt);
416 ts->ts_longretry = MS(status, AR_DataFailCnt);
417 ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
418
419 status = ACCESS_ONCE(ads->status7);
420 ts->ts_rssi = MS(status, AR_TxRSSICombined);
421 ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
422 ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
423 ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
424
425 memset(ads, 0, sizeof(*ads));
426
427 return 0;
428 }
429
430 void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
431 {
432 struct ath_hw_ops *ops = ath9k_hw_ops(hw);
433
434 ops->rx_enable = ar9003_hw_rx_enable;
435 ops->set_desc_link = ar9003_hw_set_desc_link;
436 ops->get_isr = ar9003_hw_get_isr;
437 ops->set_txdesc = ar9003_set_txdesc;
438 ops->proc_txdesc = ar9003_hw_proc_txdesc;
439 }
440
441 void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
442 {
443 REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
444 }
445 EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);
446
447 void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
448 enum ath9k_rx_qtype qtype)
449 {
450 if (qtype == ATH9K_RX_QUEUE_HP)
451 REG_WRITE(ah, AR_HP_RXDP, rxdp);
452 else
453 REG_WRITE(ah, AR_LP_RXDP, rxdp);
454 }
455 EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);
456
457 int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
458 void *buf_addr)
459 {
460 struct ar9003_rxs *rxsp = (struct ar9003_rxs *) buf_addr;
461 unsigned int phyerr;
462
463 if ((rxsp->status11 & AR_RxDone) == 0)
464 return -EINPROGRESS;
465
466 if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
467 return -EINVAL;
468
469 if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0)
470 return -EINPROGRESS;
471
472 rxs->rs_status = 0;
473 rxs->rs_flags = 0;
474 rxs->flag = 0;
475
476 rxs->rs_datalen = rxsp->status2 & AR_DataLen;
477 rxs->rs_tstamp = rxsp->status3;
478
479 /* XXX: Keycache */
480 rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
481 rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
482 rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
483 rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
484 rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
485 rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
486 rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
487
488 if (rxsp->status11 & AR_RxKeyIdxValid)
489 rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
490 else
491 rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;
492
493 rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
494 rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;
495
496 rxs->rs_firstaggr = (rxsp->status11 & AR_RxFirstAggr) ? 1 : 0;
497 rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
498 rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
499 rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
500 rxs->flag |= (rxsp->status4 & AR_GI) ? RX_FLAG_SHORT_GI : 0;
501 rxs->flag |= (rxsp->status4 & AR_2040) ? RX_FLAG_40MHZ : 0;
502
503 rxs->evm0 = rxsp->status6;
504 rxs->evm1 = rxsp->status7;
505 rxs->evm2 = rxsp->status8;
506 rxs->evm3 = rxsp->status9;
507 rxs->evm4 = (rxsp->status10 & 0xffff);
508
509 if (rxsp->status11 & AR_PreDelimCRCErr)
510 rxs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
511
512 if (rxsp->status11 & AR_PostDelimCRCErr)
513 rxs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
514
515 if (rxsp->status11 & AR_DecryptBusyErr)
516 rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
517
518 if ((rxsp->status11 & AR_RxFrameOK) == 0) {
519 /*
520 * AR_CRCErr will bet set to true if we're on the last
521 * subframe and the AR_PostDelimCRCErr is caught.
522 * In a way this also gives us a guarantee that when
523 * (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
524 * possibly be reviewing the last subframe. AR_CRCErr
525 * is the CRC of the actual data.
526 */
527 if (rxsp->status11 & AR_CRCErr)
528 rxs->rs_status |= ATH9K_RXERR_CRC;
529 else if (rxsp->status11 & AR_DecryptCRCErr)
530 rxs->rs_status |= ATH9K_RXERR_DECRYPT;
531 else if (rxsp->status11 & AR_MichaelErr)
532 rxs->rs_status |= ATH9K_RXERR_MIC;
533 if (rxsp->status11 & AR_PHYErr) {
534 phyerr = MS(rxsp->status11, AR_PHYErrCode);
535 /*
536 * If we reach a point here where AR_PostDelimCRCErr is
537 * true it implies we're *not* on the last subframe. In
538 * in that case that we know already that the CRC of
539 * the frame was OK, and MAC would send an ACK for that
540 * subframe, even if we did get a phy error of type
541 * ATH9K_PHYERR_OFDM_RESTART. This is only applicable
542 * to frame that are prior to the last subframe.
543 * The AR_PostDelimCRCErr is the CRC for the MPDU
544 * delimiter, which contains the 4 reserved bits,
545 * the MPDU length (12 bits), and follows the MPDU
546 * delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
547 */
548 if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
549 (rxsp->status11 & AR_PostDelimCRCErr)) {
550 rxs->rs_phyerr = 0;
551 } else {
552 rxs->rs_status |= ATH9K_RXERR_PHY;
553 rxs->rs_phyerr = phyerr;
554 }
555 }
556 }
557
558 if (rxsp->status11 & AR_KeyMiss)
559 rxs->rs_status |= ATH9K_RXERR_KEYMISS;
560
561 return 0;
562 }
563 EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
564
565 void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
566 {
567 ah->ts_tail = 0;
568
569 memset((void *) ah->ts_ring, 0,
570 ah->ts_size * sizeof(struct ar9003_txs));
571
572 ath_dbg(ath9k_hw_common(ah), XMIT,
573 "TS Start 0x%x End 0x%x Virt %p, Size %d\n",
574 ah->ts_paddr_start, ah->ts_paddr_end,
575 ah->ts_ring, ah->ts_size);
576
577 REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
578 REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
579 }
580
581 void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
582 u32 ts_paddr_start,
583 u16 size)
584 {
585
586 ah->ts_paddr_start = ts_paddr_start;
587 ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
588 ah->ts_size = size;
589 ah->ts_ring = (struct ar9003_txs *) ts_start;
590
591 ath9k_hw_reset_txstatus_ring(ah);
592 }
593 EXPORT_SYMBOL(ath9k_hw_setup_statusring);
Linux with added FPC-III support