summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath9k/mci.c
blob: 815bee21c19a0fe1aeb2194fbdba2372be2b279b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
/*
 * Copyright (c) 2010-2011 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 <linux/dma-mapping.h>
#include <linux/slab.h>

#include "ath9k.h"
#include "mci.h"

static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };

static struct ath_mci_profile_info*
ath_mci_find_profile(struct ath_mci_profile *mci,
		     struct ath_mci_profile_info *info)
{
	struct ath_mci_profile_info *entry;

	if (list_empty(&mci->info))
		return NULL;

	list_for_each_entry(entry, &mci->info, list) {
		if (entry->conn_handle == info->conn_handle)
			return entry;
	}
	return NULL;
}

static bool ath_mci_add_profile(struct ath_common *common,
				struct ath_mci_profile *mci,
				struct ath_mci_profile_info *info)
{
	struct ath_mci_profile_info *entry;
	u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };

	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
	    (info->type == MCI_GPM_COEX_PROFILE_VOICE))
		return false;

	if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
	    (info->type != MCI_GPM_COEX_PROFILE_VOICE))
		return false;

	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
	if (!entry)
		return false;

	memcpy(entry, info, 10);
	INC_PROF(mci, info);
	list_add_tail(&entry->list, &mci->info);
	if (info->type == MCI_GPM_COEX_PROFILE_VOICE) {
		if (info->voice_type < sizeof(voice_priority))
			mci->voice_priority = voice_priority[info->voice_type];
		else
			mci->voice_priority = 110;
	}

	return true;
}

static void ath_mci_del_profile(struct ath_common *common,
				struct ath_mci_profile *mci,
				struct ath_mci_profile_info *entry)
{
	if (!entry)
		return;

	DEC_PROF(mci, entry);
	list_del(&entry->list);
	kfree(entry);
}

void ath_mci_flush_profile(struct ath_mci_profile *mci)
{
	struct ath_mci_profile_info *info, *tinfo;

	mci->aggr_limit = 0;
	mci->num_mgmt = 0;

	if (list_empty(&mci->info))
		return;

	list_for_each_entry_safe(info, tinfo, &mci->info, list) {
		list_del(&info->list);
		DEC_PROF(mci, info);
		kfree(info);
	}
}

static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
{
	struct ath_mci_profile *mci = &btcoex->mci;
	u32 wlan_airtime = btcoex->btcoex_period *
				(100 - btcoex->duty_cycle) / 100;

	/*
	 * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
	 * When wlan_airtime is less than 4ms, aggregation limit has to be
	 * adjusted half of wlan_airtime to ensure that the aggregation can fit
	 * without collision with BT traffic.
	 */
	if ((wlan_airtime <= 4) &&
	    (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
		mci->aggr_limit = 2 * wlan_airtime;
}

static void ath_mci_update_scheme(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
	struct ath_mci_profile_info *info;
	u32 num_profile = NUM_PROF(mci);

	if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
		goto skip_tuning;

	mci->aggr_limit = 0;
	btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
	btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
	if (NUM_PROF(mci))
		btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
	else
		btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
							ATH_BTCOEX_STOMP_LOW;

	if (num_profile == 1) {
		info = list_first_entry(&mci->info,
					struct ath_mci_profile_info,
					list);
		if (mci->num_sco) {
			if (info->T == 12)
				mci->aggr_limit = 8;
			else if (info->T == 6) {
				mci->aggr_limit = 6;
				btcoex->duty_cycle = 30;
			} else
				mci->aggr_limit = 6;
			ath_dbg(common, MCI,
				"Single SCO, aggregation limit %d 1/4 ms\n",
				mci->aggr_limit);
		} else if (mci->num_pan || mci->num_other_acl) {
			/*
			 * For single PAN/FTP profile, allocate 35% for BT
			 * to improve WLAN throughput.
			 */
			btcoex->duty_cycle = AR_SREV_9565(sc->sc_ah) ? 40 : 35;
			btcoex->btcoex_period = 53;
			ath_dbg(common, MCI,
				"Single PAN/FTP bt period %d ms dutycycle %d\n",
				btcoex->duty_cycle, btcoex->btcoex_period);
		} else if (mci->num_hid) {
			btcoex->duty_cycle = 30;
			mci->aggr_limit = 6;
			ath_dbg(common, MCI,
				"Multiple attempt/timeout single HID "
				"aggregation limit 1.5 ms dutycycle 30%%\n");
		}
	} else if (num_profile == 2) {
		if (mci->num_hid == 2)
			btcoex->duty_cycle = 30;
		mci->aggr_limit = 6;
		ath_dbg(common, MCI,
			"Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
			btcoex->duty_cycle);
	} else if (num_profile >= 3) {
		mci->aggr_limit = 4;
		ath_dbg(common, MCI,
			"Three or more profiles aggregation limit 1 ms\n");
	}

skip_tuning:
	if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
		if (IS_CHAN_HT(sc->sc_ah->curchan))
			ath_mci_adjust_aggr_limit(btcoex);
		else
			btcoex->btcoex_period >>= 1;
	}

	ath9k_btcoex_timer_pause(sc);
	ath9k_hw_btcoex_disable(sc->sc_ah);

	if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
		return;

	btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
	if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
		btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;

	btcoex->btcoex_no_stomp =  btcoex->btcoex_period * 1000 *
		(100 - btcoex->duty_cycle) / 100;

	ath9k_hw_btcoex_enable(sc->sc_ah);
	ath9k_btcoex_timer_resume(sc);
}

static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
	u32 payload[4] = {0, 0, 0, 0};

	switch (opcode) {
	case MCI_GPM_BT_CAL_REQ:
		if (mci_hw->bt_state == MCI_BT_AWAKE) {
			mci_hw->bt_state = MCI_BT_CAL_START;
			ath9k_queue_reset(sc, RESET_TYPE_MCI);
		}
		ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
		break;
	case MCI_GPM_BT_CAL_GRANT:
		MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
		ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
					16, false, true);
		break;
	default:
		ath_dbg(common, MCI, "Unknown GPM CAL message\n");
		break;
	}
}

static void ath9k_mci_work(struct work_struct *work)
{
	struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);

	ath_mci_update_scheme(sc);
}

static void ath_mci_update_stomp_txprio(u8 cur_txprio, u8 *stomp_prio)
{
	if (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_NONE])
		stomp_prio[ATH_BTCOEX_STOMP_NONE] = cur_txprio;

	if (cur_txprio > stomp_prio[ATH_BTCOEX_STOMP_ALL])
		stomp_prio[ATH_BTCOEX_STOMP_ALL] = cur_txprio;

	if ((cur_txprio > ATH_MCI_HI_PRIO) &&
	    (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_LOW]))
		stomp_prio[ATH_BTCOEX_STOMP_LOW] = cur_txprio;
}

static void ath_mci_set_concur_txprio(struct ath_softc *sc)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	u8 stomp_txprio[ATH_BTCOEX_STOMP_MAX];

	memset(stomp_txprio, 0, sizeof(stomp_txprio));
	if (mci->num_mgmt) {
		stomp_txprio[ATH_BTCOEX_STOMP_ALL] = ATH_MCI_INQUIRY_PRIO;
		if (!mci->num_pan && !mci->num_other_acl)
			stomp_txprio[ATH_BTCOEX_STOMP_NONE] =
				ATH_MCI_INQUIRY_PRIO;
	} else {
		u8 prof_prio[] = { 50, 90, 94, 52 };/* RFCOMM, A2DP, HID, PAN */

		stomp_txprio[ATH_BTCOEX_STOMP_LOW] =
		stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0xff;

		if (mci->num_sco)
			ath_mci_update_stomp_txprio(mci->voice_priority,
						    stomp_txprio);
		if (mci->num_other_acl)
			ath_mci_update_stomp_txprio(prof_prio[0], stomp_txprio);
		if (mci->num_a2dp)
			ath_mci_update_stomp_txprio(prof_prio[1], stomp_txprio);
		if (mci->num_hid)
			ath_mci_update_stomp_txprio(prof_prio[2], stomp_txprio);
		if (mci->num_pan)
			ath_mci_update_stomp_txprio(prof_prio[3], stomp_txprio);

		if (stomp_txprio[ATH_BTCOEX_STOMP_NONE] == 0xff)
			stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0;

		if (stomp_txprio[ATH_BTCOEX_STOMP_LOW] == 0xff)
			stomp_txprio[ATH_BTCOEX_STOMP_LOW] = 0;
	}
	ath9k_hw_btcoex_set_concur_txprio(sc->sc_ah, stomp_txprio);
}

static u8 ath_mci_process_profile(struct ath_softc *sc,
				  struct ath_mci_profile_info *info)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath_mci_profile_info *entry = NULL;

	entry = ath_mci_find_profile(mci, info);
	if (entry) {
		/*
		 * Two MCI interrupts are generated while connecting to
		 * headset and A2DP profile, but only one MCI interrupt
		 * is generated with last added profile type while disconnecting
		 * both profiles.
		 * So while adding second profile type decrement
		 * the first one.
		 */
		if (entry->type != info->type) {
			DEC_PROF(mci, entry);
			INC_PROF(mci, info);
		}
		memcpy(entry, info, 10);
	}

	if (info->start) {
		if (!entry && !ath_mci_add_profile(common, mci, info))
			return 0;
	} else
		ath_mci_del_profile(common, mci, entry);

	ath_mci_set_concur_txprio(sc);
	return 1;
}

static u8 ath_mci_process_status(struct ath_softc *sc,
				 struct ath_mci_profile_status *status)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath_mci_profile_info info;
	int i = 0, old_num_mgmt = mci->num_mgmt;

	/* Link status type are not handled */
	if (status->is_link)
		return 0;

	info.conn_handle = status->conn_handle;
	if (ath_mci_find_profile(mci, &info))
		return 0;

	if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
		return 0;

	if (status->is_critical)
		__set_bit(status->conn_handle, mci->status);
	else
		__clear_bit(status->conn_handle, mci->status);

	mci->num_mgmt = 0;
	do {
		if (test_bit(i, mci->status))
			mci->num_mgmt++;
	} while (++i < ATH_MCI_MAX_PROFILE);

	ath_mci_set_concur_txprio(sc);
	if (old_num_mgmt != mci->num_mgmt)
		return 1;

	return 0;
}

static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_mci_profile_info profile_info;
	struct ath_mci_profile_status profile_status;
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	u8 major, minor, update_scheme = 0;
	u32 seq_num;

	if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
	    ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
		ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
		ath_mci_flush_profile(&sc->btcoex.mci);
		ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
	}

	switch (opcode) {
	case MCI_GPM_COEX_VERSION_QUERY:
		ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
		break;
	case MCI_GPM_COEX_VERSION_RESPONSE:
		major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
		minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
		ar9003_mci_set_bt_version(ah, major, minor);
		break;
	case MCI_GPM_COEX_STATUS_QUERY:
		ar9003_mci_send_wlan_channels(ah);
		break;
	case MCI_GPM_COEX_BT_PROFILE_INFO:
		memcpy(&profile_info,
		       (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);

		if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
		    (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
			ath_dbg(common, MCI,
				"Illegal profile type = %d, state = %d\n",
				profile_info.type,
				profile_info.start);
			break;
		}

		update_scheme += ath_mci_process_profile(sc, &profile_info);
		break;
	case MCI_GPM_COEX_BT_STATUS_UPDATE:
		profile_status.is_link = *(rx_payload +
					   MCI_GPM_COEX_B_STATUS_TYPE);
		profile_status.conn_handle = *(rx_payload +
					       MCI_GPM_COEX_B_STATUS_LINKID);
		profile_status.is_critical = *(rx_payload +
					       MCI_GPM_COEX_B_STATUS_STATE);

		seq_num = *((u32 *)(rx_payload + 12));
		ath_dbg(common, MCI,
			"BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%u\n",
			profile_status.is_link, profile_status.conn_handle,
			profile_status.is_critical, seq_num);

		update_scheme += ath_mci_process_status(sc, &profile_status);
		break;
	default:
		ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
		break;
	}
	if (update_scheme)
		ieee80211_queue_work(sc->hw, &sc->mci_work);
}

int ath_mci_setup(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_mci_coex *mci = &sc->mci_coex;
	struct ath_mci_buf *buf = &mci->sched_buf;
	int ret;

	buf->bf_addr = dmam_alloc_coherent(sc->dev,
				  ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
				  &buf->bf_paddr, GFP_KERNEL);

	if (buf->bf_addr == NULL) {
		ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
		return -ENOMEM;
	}

	memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
	       ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);

	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;

	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;

	ret = ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
			       mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
			       mci->sched_buf.bf_paddr);
	if (ret) {
		ath_err(common, "Failed to initialize MCI\n");
		return ret;
	}

	INIT_WORK(&sc->mci_work, ath9k_mci_work);
	ath_dbg(common, MCI, "MCI Initialized\n");

	return 0;
}

void ath_mci_cleanup(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_hw *ah = sc->sc_ah;

	ar9003_mci_cleanup(ah);

	ath_dbg(common, MCI, "MCI De-Initialized\n");
}

void ath_mci_intr(struct ath_softc *sc)
{
	struct ath_mci_coex *mci = &sc->mci_coex;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
	u32 mci_int, mci_int_rxmsg;
	u32 offset, subtype, opcode;
	u32 *pgpm;
	u32 more_data = MCI_GPM_MORE;
	bool skip_gpm = false;

	ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);

	if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
		ar9003_mci_get_next_gpm_offset(ah, true, NULL);
		return;
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
		u32 payload[4] = { 0xffffffff, 0xffffffff,
				   0xffffffff, 0xffffff00};

		/*
		 * The following REMOTE_RESET and SYS_WAKING used to sent
		 * only when BT wake up. Now they are always sent, as a
		 * recovery method to reset BT MCI's RX alignment.
		 */
		ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
					payload, 16, true, false);
		ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
					NULL, 0, true, false);

		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
		ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);

		/*
		 * always do this for recovery and 2G/5G toggling and LNA_TRANS
		 */
		ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;

		if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
		    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
		     MCI_BT_SLEEP))
			ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;

		if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
		    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
		     MCI_BT_AWAKE))
			mci_hw->bt_state = MCI_BT_SLEEP;
	}

	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
		ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
		skip_gpm = true;
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
		offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;

		while (more_data == MCI_GPM_MORE) {
			if (test_bit(SC_OP_HW_RESET, &sc->sc_flags))
				return;

			pgpm = mci->gpm_buf.bf_addr;
			offset = ar9003_mci_get_next_gpm_offset(ah, false,
								&more_data);

			if (offset == MCI_GPM_INVALID)
				break;

			pgpm += (offset >> 2);

			/*
			 * The first dword is timer.
			 * The real data starts from 2nd dword.
			 */
			subtype = MCI_GPM_TYPE(pgpm);
			opcode = MCI_GPM_OPCODE(pgpm);

			if (skip_gpm)
				goto recycle;

			if (MCI_GPM_IS_CAL_TYPE(subtype)) {
				ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
			} else {
				switch (subtype) {
				case MCI_GPM_COEX_AGENT:
					ath_mci_msg(sc, opcode, (u8 *)pgpm);
					break;
				default:
					break;
				}
			}
		recycle:
			MCI_GPM_RECYCLE(pgpm);
		}
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
			int value_dbm = MS(mci_hw->cont_status,
					   AR_MCI_CONT_RSSI_POWER);

			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;

			ath_dbg(common, MCI,
				"MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
				MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
				"tx" : "rx",
				MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
				value_dbm);
		}

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
	}

	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
		mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
			     AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
		ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
	}
}

void ath_mci_enable(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	if (!common->btcoex_enabled)
		return;

	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
		sc->sc_ah->imask |= ATH9K_INT_MCI;
}

void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	struct ath9k_channel *chan = ah->curchan;
	u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff};
	int i;
	s16 chan_start, chan_end;
	u16 wlan_chan;

	if (!chan || !IS_CHAN_2GHZ(chan))
		return;

	if (allow_all)
		goto send_wlan_chan;

	wlan_chan = chan->channel - 2402;

	chan_start = wlan_chan - 10;
	chan_end = wlan_chan + 10;

	if (chan->chanmode == CHANNEL_G_HT40PLUS)
		chan_end += 20;
	else if (chan->chanmode == CHANNEL_G_HT40MINUS)
		chan_start -= 20;

	/* adjust side band */
	chan_start -= 7;
	chan_end += 7;

	if (chan_start <= 0)
		chan_start = 0;
	if (chan_end >= ATH_MCI_NUM_BT_CHANNELS)
		chan_end = ATH_MCI_NUM_BT_CHANNELS - 1;

	ath_dbg(ath9k_hw_common(ah), MCI,
		"WLAN current channel %d mask BT channel %d - %d\n",
		wlan_chan, chan_start, chan_end);

	for (i = chan_start; i < chan_end; i++)
		MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i);

send_wlan_chan:
	/* update and send wlan channels info to BT */
	for (i = 0; i < 4; i++)
		mci->wlan_channels[i] = channelmap[i];
	ar9003_mci_send_wlan_channels(ah);
	ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY);
}

void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel,
			   bool concur_tx)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
	bool old_concur_tx = mci_hw->concur_tx;

	if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) {
		mci_hw->concur_tx = false;
		return;
	}

	if (!IS_CHAN_2GHZ(ah->curchan))
		return;

	if (setchannel) {
		struct ath9k_hw_cal_data *caldata = &sc->caldata;
		if ((caldata->chanmode == CHANNEL_G_HT40PLUS) &&
		    (ah->curchan->channel > caldata->channel) &&
		    (ah->curchan->channel <= caldata->channel + 20))
			return;
		if ((caldata->chanmode == CHANNEL_G_HT40MINUS) &&
		    (ah->curchan->channel < caldata->channel) &&
		    (ah->curchan->channel >= caldata->channel - 20))
			return;
		mci_hw->concur_tx = false;
	} else
		mci_hw->concur_tx = concur_tx;

	if (old_concur_tx != mci_hw->concur_tx)
		ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
}

static void ath9k_mci_stomp_audio(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;

	if (!mci->num_sco && !mci->num_a2dp)
		return;

	if (ah->stats.avgbrssi > 25) {
		btcoex->stomp_audio = 0;
		return;
	}

	btcoex->stomp_audio++;
}
void ath9k_mci_update_rssi(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;

	ath9k_mci_stomp_audio(sc);

	if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))
		return;

	if (ah->stats.avgbrssi >= 40) {
		if (btcoex->rssi_count < 0)
			btcoex->rssi_count = 0;
		if (++btcoex->rssi_count >= ATH_MCI_CONCUR_TX_SWITCH) {
			btcoex->rssi_count = 0;
			ath9k_mci_set_txpower(sc, false, true);
		}
	} else {
		if (btcoex->rssi_count > 0)
			btcoex->rssi_count = 0;
		if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) {
			btcoex->rssi_count = 0;
			ath9k_mci_set_txpower(sc, false, false);
		}
	}
}