2
* Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3
* Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
5
* Permission to use, copy, modify, and distribute this software for any
6
* purpose with or without fee is hereby granted, provided that the above
7
* copyright notice and this permission notice appear in all copies.
9
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
/********************************************\
20
Queue Control Unit, DFS Control Unit Functions
21
\********************************************/
33
* Get number of pending frames
34
* for a specific queue [5211+]
36
u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue)
39
AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
41
/* Return if queue is declared inactive */
42
if (ah->ah_txq[queue].tqi_type == AR5K_TX_QUEUE_INACTIVE)
45
/* XXX: How about AR5K_CFG_TXCNT ? */
46
if (ah->ah_version == AR5K_AR5210)
49
pending = ath5k_hw_reg_read(ah, AR5K_QUEUE_STATUS(queue));
50
pending &= AR5K_QCU_STS_FRMPENDCNT;
52
/* It's possible to have no frames pending even if TXE
53
* is set. To indicate that q has not stopped return
55
if (!pending && AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, queue))
62
* Set a transmit queue inactive
64
void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue)
66
if (WARN_ON(queue >= ah->ah_capabilities.cap_queues.q_tx_num))
69
/* This queue will be skipped in further operations */
70
ah->ah_txq[queue].tqi_type = AR5K_TX_QUEUE_INACTIVE;
72
AR5K_Q_DISABLE_BITS(ah->ah_txq_status, queue);
76
* Make sure cw is a power of 2 minus 1 and smaller than 1024
78
static u16 ath5k_cw_validate(u16 cw_req)
81
cw_req = min(cw_req, (u16)1023);
90
* Get properties for a transmit queue
92
int ath5k_hw_get_tx_queueprops(struct ath5k_hw *ah, int queue,
93
struct ath5k_txq_info *queue_info)
95
memcpy(queue_info, &ah->ah_txq[queue], sizeof(struct ath5k_txq_info));
100
* Set properties for a transmit queue
102
int ath5k_hw_set_tx_queueprops(struct ath5k_hw *ah, int queue,
103
const struct ath5k_txq_info *qinfo)
105
struct ath5k_txq_info *qi;
107
AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
109
qi = &ah->ah_txq[queue];
111
if (qi->tqi_type == AR5K_TX_QUEUE_INACTIVE)
114
/* copy and validate values */
115
qi->tqi_type = qinfo->tqi_type;
116
qi->tqi_subtype = qinfo->tqi_subtype;
117
qi->tqi_flags = qinfo->tqi_flags;
119
* According to the docs: Although the AIFS field is 8 bit wide,
120
* the maximum supported value is 0xFC. Setting it higher than that
121
* will cause the DCU to hang.
123
qi->tqi_aifs = min(qinfo->tqi_aifs, (u8)0xFC);
124
qi->tqi_cw_min = ath5k_cw_validate(qinfo->tqi_cw_min);
125
qi->tqi_cw_max = ath5k_cw_validate(qinfo->tqi_cw_max);
126
qi->tqi_cbr_period = qinfo->tqi_cbr_period;
127
qi->tqi_cbr_overflow_limit = qinfo->tqi_cbr_overflow_limit;
128
qi->tqi_burst_time = qinfo->tqi_burst_time;
129
qi->tqi_ready_time = qinfo->tqi_ready_time;
131
/*XXX: Is this supported on 5210 ?*/
132
/*XXX: Is this correct for AR5K_WME_AC_VI,VO ???*/
133
if ((qinfo->tqi_type == AR5K_TX_QUEUE_DATA &&
134
((qinfo->tqi_subtype == AR5K_WME_AC_VI) ||
135
(qinfo->tqi_subtype == AR5K_WME_AC_VO))) ||
136
qinfo->tqi_type == AR5K_TX_QUEUE_UAPSD)
137
qi->tqi_flags |= AR5K_TXQ_FLAG_POST_FR_BKOFF_DIS;
143
* Initialize a transmit queue
145
int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type,
146
struct ath5k_txq_info *queue_info)
154
/* 5210 only has 2 queues */
155
if (ah->ah_capabilities.cap_queues.q_tx_num == 2) {
156
switch (queue_type) {
157
case AR5K_TX_QUEUE_DATA:
158
queue = AR5K_TX_QUEUE_ID_NOQCU_DATA;
160
case AR5K_TX_QUEUE_BEACON:
161
case AR5K_TX_QUEUE_CAB:
162
queue = AR5K_TX_QUEUE_ID_NOQCU_BEACON;
168
switch (queue_type) {
169
case AR5K_TX_QUEUE_DATA:
170
for (queue = AR5K_TX_QUEUE_ID_DATA_MIN;
171
ah->ah_txq[queue].tqi_type !=
172
AR5K_TX_QUEUE_INACTIVE; queue++) {
174
if (queue > AR5K_TX_QUEUE_ID_DATA_MAX)
178
case AR5K_TX_QUEUE_UAPSD:
179
queue = AR5K_TX_QUEUE_ID_UAPSD;
181
case AR5K_TX_QUEUE_BEACON:
182
queue = AR5K_TX_QUEUE_ID_BEACON;
184
case AR5K_TX_QUEUE_CAB:
185
queue = AR5K_TX_QUEUE_ID_CAB;
193
* Setup internal queue structure
195
memset(&ah->ah_txq[queue], 0, sizeof(struct ath5k_txq_info));
196
ah->ah_txq[queue].tqi_type = queue_type;
198
if (queue_info != NULL) {
199
queue_info->tqi_type = queue_type;
200
ret = ath5k_hw_set_tx_queueprops(ah, queue, queue_info);
206
* We use ah_txq_status to hold a temp value for
207
* the Secondary interrupt mask registers on 5211+
208
* check out ath5k_hw_reset_tx_queue
210
AR5K_Q_ENABLE_BITS(ah->ah_txq_status, queue);
216
/*******************************\
217
* Single QCU/DCU initialization *
218
\*******************************/
221
* Set tx retry limits on DCU
223
void ath5k_hw_set_tx_retry_limits(struct ath5k_hw *ah,
226
/* Single data queue on AR5210 */
227
if (ah->ah_version == AR5K_AR5210) {
228
struct ath5k_txq_info *tq = &ah->ah_txq[queue];
233
ath5k_hw_reg_write(ah,
234
(tq->tqi_cw_min << AR5K_NODCU_RETRY_LMT_CW_MIN_S)
235
| AR5K_REG_SM(ah->ah_retry_long,
236
AR5K_NODCU_RETRY_LMT_SLG_RETRY)
237
| AR5K_REG_SM(ah->ah_retry_short,
238
AR5K_NODCU_RETRY_LMT_SSH_RETRY)
239
| AR5K_REG_SM(ah->ah_retry_long,
240
AR5K_NODCU_RETRY_LMT_LG_RETRY)
241
| AR5K_REG_SM(ah->ah_retry_short,
242
AR5K_NODCU_RETRY_LMT_SH_RETRY),
243
AR5K_NODCU_RETRY_LMT);
246
ath5k_hw_reg_write(ah,
247
AR5K_REG_SM(ah->ah_retry_long,
248
AR5K_DCU_RETRY_LMT_RTS)
249
| AR5K_REG_SM(ah->ah_retry_long,
250
AR5K_DCU_RETRY_LMT_STA_RTS)
251
| AR5K_REG_SM(max(ah->ah_retry_long, ah->ah_retry_short),
252
AR5K_DCU_RETRY_LMT_STA_DATA),
253
AR5K_QUEUE_DFS_RETRY_LIMIT(queue));
258
* ath5k_hw_reset_tx_queue - Initialize a single hw queue
260
* @ah The &struct ath5k_hw
261
* @queue The hw queue number
263
* Set DFS properties for the given transmit queue on DCU
264
* and configures all queue-specific parameters.
266
int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
268
struct ath5k_txq_info *tq = &ah->ah_txq[queue];
270
AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
272
tq = &ah->ah_txq[queue];
274
/* Skip if queue inactive or if we are on AR5210
275
* that doesn't have QCU/DCU */
276
if ((ah->ah_version == AR5K_AR5210) ||
277
(tq->tqi_type == AR5K_TX_QUEUE_INACTIVE))
281
* Set contention window (cw_min/cw_max)
282
* and arbitrated interframe space (aifs)...
284
ath5k_hw_reg_write(ah,
285
AR5K_REG_SM(tq->tqi_cw_min, AR5K_DCU_LCL_IFS_CW_MIN) |
286
AR5K_REG_SM(tq->tqi_cw_max, AR5K_DCU_LCL_IFS_CW_MAX) |
287
AR5K_REG_SM(tq->tqi_aifs, AR5K_DCU_LCL_IFS_AIFS),
288
AR5K_QUEUE_DFS_LOCAL_IFS(queue));
291
* Set tx retry limits for this queue
293
ath5k_hw_set_tx_retry_limits(ah, queue);
300
/* Enable DCU to wait for next fragment from QCU */
301
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
302
AR5K_DCU_MISC_FRAG_WAIT);
304
/* On Maui and Spirit use the global seqnum on DCU */
305
if (ah->ah_mac_version < AR5K_SREV_AR5211)
306
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
307
AR5K_DCU_MISC_SEQNUM_CTL);
309
/* Constant bit rate period */
310
if (tq->tqi_cbr_period) {
311
ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_cbr_period,
312
AR5K_QCU_CBRCFG_INTVAL) |
313
AR5K_REG_SM(tq->tqi_cbr_overflow_limit,
314
AR5K_QCU_CBRCFG_ORN_THRES),
315
AR5K_QUEUE_CBRCFG(queue));
317
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
318
AR5K_QCU_MISC_FRSHED_CBR);
320
if (tq->tqi_cbr_overflow_limit)
321
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
322
AR5K_QCU_MISC_CBR_THRES_ENABLE);
325
/* Ready time interval */
326
if (tq->tqi_ready_time && (tq->tqi_type != AR5K_TX_QUEUE_CAB))
327
ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_ready_time,
328
AR5K_QCU_RDYTIMECFG_INTVAL) |
329
AR5K_QCU_RDYTIMECFG_ENABLE,
330
AR5K_QUEUE_RDYTIMECFG(queue));
332
if (tq->tqi_burst_time) {
333
ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_burst_time,
334
AR5K_DCU_CHAN_TIME_DUR) |
335
AR5K_DCU_CHAN_TIME_ENABLE,
336
AR5K_QUEUE_DFS_CHANNEL_TIME(queue));
338
if (tq->tqi_flags & AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)
339
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
340
AR5K_QCU_MISC_RDY_VEOL_POLICY);
343
/* Enable/disable Post frame backoff */
344
if (tq->tqi_flags & AR5K_TXQ_FLAG_BACKOFF_DISABLE)
345
ath5k_hw_reg_write(ah, AR5K_DCU_MISC_POST_FR_BKOFF_DIS,
346
AR5K_QUEUE_DFS_MISC(queue));
348
/* Enable/disable fragmentation burst backoff */
349
if (tq->tqi_flags & AR5K_TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
350
ath5k_hw_reg_write(ah, AR5K_DCU_MISC_BACKOFF_FRAG,
351
AR5K_QUEUE_DFS_MISC(queue));
354
* Set registers by queue type
356
switch (tq->tqi_type) {
357
case AR5K_TX_QUEUE_BEACON:
358
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
359
AR5K_QCU_MISC_FRSHED_DBA_GT |
360
AR5K_QCU_MISC_CBREXP_BCN_DIS |
361
AR5K_QCU_MISC_BCN_ENABLE);
363
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
364
(AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<
365
AR5K_DCU_MISC_ARBLOCK_CTL_S) |
366
AR5K_DCU_MISC_ARBLOCK_IGNORE |
367
AR5K_DCU_MISC_POST_FR_BKOFF_DIS |
368
AR5K_DCU_MISC_BCN_ENABLE);
371
case AR5K_TX_QUEUE_CAB:
372
/* XXX: use BCN_SENT_GT, if we can figure out how */
373
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
374
AR5K_QCU_MISC_FRSHED_DBA_GT |
375
AR5K_QCU_MISC_CBREXP_DIS |
376
AR5K_QCU_MISC_CBREXP_BCN_DIS);
378
ath5k_hw_reg_write(ah, ((tq->tqi_ready_time -
379
(AR5K_TUNE_SW_BEACON_RESP -
380
AR5K_TUNE_DMA_BEACON_RESP) -
381
AR5K_TUNE_ADDITIONAL_SWBA_BACKOFF) * 1024) |
382
AR5K_QCU_RDYTIMECFG_ENABLE,
383
AR5K_QUEUE_RDYTIMECFG(queue));
385
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
386
(AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<
387
AR5K_DCU_MISC_ARBLOCK_CTL_S));
390
case AR5K_TX_QUEUE_UAPSD:
391
AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
392
AR5K_QCU_MISC_CBREXP_DIS);
395
case AR5K_TX_QUEUE_DATA:
400
/* TODO: Handle frame compression */
403
* Enable interrupts for this tx queue
404
* in the secondary interrupt mask registers
406
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXOKINT_ENABLE)
407
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txok, queue);
409
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXERRINT_ENABLE)
410
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txerr, queue);
412
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXURNINT_ENABLE)
413
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txurn, queue);
415
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXDESCINT_ENABLE)
416
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txdesc, queue);
418
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXEOLINT_ENABLE)
419
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txeol, queue);
421
if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRORNINT_ENABLE)
422
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrorn, queue);
424
if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRURNINT_ENABLE)
425
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrurn, queue);
427
if (tq->tqi_flags & AR5K_TXQ_FLAG_QTRIGINT_ENABLE)
428
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_qtrig, queue);
430
if (tq->tqi_flags & AR5K_TXQ_FLAG_TXNOFRMINT_ENABLE)
431
AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_nofrm, queue);
433
/* Update secondary interrupt mask registers */
435
/* Filter out inactive queues */
436
ah->ah_txq_imr_txok &= ah->ah_txq_status;
437
ah->ah_txq_imr_txerr &= ah->ah_txq_status;
438
ah->ah_txq_imr_txurn &= ah->ah_txq_status;
439
ah->ah_txq_imr_txdesc &= ah->ah_txq_status;
440
ah->ah_txq_imr_txeol &= ah->ah_txq_status;
441
ah->ah_txq_imr_cbrorn &= ah->ah_txq_status;
442
ah->ah_txq_imr_cbrurn &= ah->ah_txq_status;
443
ah->ah_txq_imr_qtrig &= ah->ah_txq_status;
444
ah->ah_txq_imr_nofrm &= ah->ah_txq_status;
446
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txok,
447
AR5K_SIMR0_QCU_TXOK) |
448
AR5K_REG_SM(ah->ah_txq_imr_txdesc,
449
AR5K_SIMR0_QCU_TXDESC),
452
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txerr,
453
AR5K_SIMR1_QCU_TXERR) |
454
AR5K_REG_SM(ah->ah_txq_imr_txeol,
455
AR5K_SIMR1_QCU_TXEOL),
458
/* Update SIMR2 but don't overwrite rest simr2 settings */
459
AR5K_REG_DISABLE_BITS(ah, AR5K_SIMR2, AR5K_SIMR2_QCU_TXURN);
460
AR5K_REG_ENABLE_BITS(ah, AR5K_SIMR2,
461
AR5K_REG_SM(ah->ah_txq_imr_txurn,
462
AR5K_SIMR2_QCU_TXURN));
464
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_cbrorn,
465
AR5K_SIMR3_QCBRORN) |
466
AR5K_REG_SM(ah->ah_txq_imr_cbrurn,
470
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_qtrig,
471
AR5K_SIMR4_QTRIG), AR5K_SIMR4);
473
/* Set TXNOFRM_QCU for the queues with TXNOFRM enabled */
474
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_nofrm,
475
AR5K_TXNOFRM_QCU), AR5K_TXNOFRM);
477
/* No queue has TXNOFRM enabled, disable the interrupt
478
* by setting AR5K_TXNOFRM to zero */
479
if (ah->ah_txq_imr_nofrm == 0)
480
ath5k_hw_reg_write(ah, 0, AR5K_TXNOFRM);
482
/* Set QCU mask for this DCU to save power */
483
AR5K_REG_WRITE_Q(ah, AR5K_QUEUE_QCUMASK(queue), queue);
489
/**************************\
490
* Global QCU/DCU functions *
491
\**************************/
494
* ath5k_hw_set_ifs_intervals - Set global inter-frame spaces on DCU
496
* @ah The &struct ath5k_hw
497
* @slot_time Slot time in us
499
* Sets the global IFS intervals on DCU (also works on AR5210) for
500
* the given slot time and the current bwmode.
502
int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah, unsigned int slot_time)
504
struct ieee80211_channel *channel = ah->ah_current_channel;
505
struct ieee80211_rate *rate;
506
u32 ack_tx_time, eifs, eifs_clock, sifs, sifs_clock;
507
u32 slot_time_clock = ath5k_hw_htoclock(ah, slot_time);
509
if (slot_time < 6 || slot_time_clock > AR5K_SLOT_TIME_MAX)
512
sifs = ath5k_hw_get_default_sifs(ah);
513
sifs_clock = ath5k_hw_htoclock(ah, sifs - 2);
516
* Txtime of ack at lowest rate + SIFS + DIFS
517
* (DIFS = SIFS + 2 * Slot time)
519
* Note: HAL has some predefined values for EIFS
520
* Turbo: (37 + 2 * 6)
521
* Default: (74 + 2 * 9)
522
* Half: (149 + 2 * 13)
523
* Quarter: (298 + 2 * 21)
525
* (74 + 2 * 6) for AR5210 default and turbo !
527
* According to the formula we have
528
* ack_tx_time = 25 for turbo and
529
* ack_tx_time = 42.5 * clock multiplier
530
* for default/half/quarter.
532
* This can't be right, 42 is what we would get
533
* from ath5k_hw_get_frame_dur_for_bwmode or
534
* ieee80211_generic_frame_duration for zero frame
535
* length and without SIFS !
537
* Also we have different lowest rate for 802.11a
539
if (channel->band == IEEE80211_BAND_5GHZ)
540
rate = &ah->sbands[IEEE80211_BAND_5GHZ].bitrates[0];
542
rate = &ah->sbands[IEEE80211_BAND_2GHZ].bitrates[0];
544
ack_tx_time = ath5k_hw_get_frame_duration(ah, 10, rate, false);
546
/* ack_tx_time includes an SIFS already */
547
eifs = ack_tx_time + sifs + 2 * slot_time;
548
eifs_clock = ath5k_hw_htoclock(ah, eifs);
550
/* Set IFS settings on AR5210 */
551
if (ah->ah_version == AR5K_AR5210) {
552
u32 pifs, pifs_clock, difs, difs_clock;
555
ath5k_hw_reg_write(ah, slot_time_clock, AR5K_SLOT_TIME);
558
eifs_clock = AR5K_REG_SM(eifs_clock, AR5K_IFS1_EIFS);
560
/* PIFS = Slot time + SIFS */
561
pifs = slot_time + sifs;
562
pifs_clock = ath5k_hw_htoclock(ah, pifs);
563
pifs_clock = AR5K_REG_SM(pifs_clock, AR5K_IFS1_PIFS);
565
/* DIFS = SIFS + 2 * Slot time */
566
difs = sifs + 2 * slot_time;
567
difs_clock = ath5k_hw_htoclock(ah, difs);
570
ath5k_hw_reg_write(ah, (difs_clock <<
571
AR5K_IFS0_DIFS_S) | sifs_clock,
574
/* Set PIFS/EIFS and preserve AR5K_INIT_CARR_SENSE_EN */
575
ath5k_hw_reg_write(ah, pifs_clock | eifs_clock |
576
(AR5K_INIT_CARR_SENSE_EN << AR5K_IFS1_CS_EN_S),
582
/* Set IFS slot time */
583
ath5k_hw_reg_write(ah, slot_time_clock, AR5K_DCU_GBL_IFS_SLOT);
585
/* Set EIFS interval */
586
ath5k_hw_reg_write(ah, eifs_clock, AR5K_DCU_GBL_IFS_EIFS);
588
/* Set SIFS interval in usecs */
589
AR5K_REG_WRITE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
590
AR5K_DCU_GBL_IFS_MISC_SIFS_DUR_USEC,
593
/* Set SIFS interval in clock cycles */
594
ath5k_hw_reg_write(ah, sifs_clock, AR5K_DCU_GBL_IFS_SIFS);
600
int ath5k_hw_init_queues(struct ath5k_hw *ah)
604
/* TODO: HW Compression support for data queues */
605
/* TODO: Burst prefetch for data queues */
608
* Reset queues and start beacon timers at the end of the reset routine
609
* This also sets QCU mask on each DCU for 1:1 qcu to dcu mapping
610
* Note: If we want we can assign multiple qcus on one dcu.
612
if (ah->ah_version != AR5K_AR5210)
613
for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++) {
614
ret = ath5k_hw_reset_tx_queue(ah, i);
617
"failed to reset TX queue #%d\n", i);
622
/* No QCU/DCU on AR5210, just set tx
623
* retry limits. We set IFS parameters
624
* on ath5k_hw_set_ifs_intervals */
625
ath5k_hw_set_tx_retry_limits(ah, 0);
627
/* Set the turbo flag when operating on 40MHz */
628
if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
629
AR5K_REG_ENABLE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
630
AR5K_DCU_GBL_IFS_MISC_TURBO_MODE);
632
/* If we didn't set IFS timings through
633
* ath5k_hw_set_coverage_class make sure
634
* we set them here */
635
if (!ah->ah_coverage_class) {
636
unsigned int slot_time = ath5k_hw_get_default_slottime(ah);
637
ath5k_hw_set_ifs_intervals(ah, slot_time);