summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath9k/ar9003_mci.c
blob: 709520c6835bd62444a8aa1f713fd67264be6985 (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
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
/*
 * Copyright (c) 2008-2011 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/export.h>
#include "hw.h"
#include "ar9003_phy.h"
#include "ar9003_mci.h"

static void ar9003_mci_reset_req_wakeup(struct ath_hw *ah)
{
	if (!AR_SREV_9462_20(ah))
		return;

	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 1);
	udelay(1);
	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 0);
}

static int ar9003_mci_wait_for_interrupt(struct ath_hw *ah, u32 address,
					u32 bit_position, int time_out)
{
	struct ath_common *common = ath9k_hw_common(ah);

	while (time_out) {

		if (REG_READ(ah, address) & bit_position) {

			REG_WRITE(ah, address, bit_position);

			if (address == AR_MCI_INTERRUPT_RX_MSG_RAW) {

				if (bit_position &
				    AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)
					ar9003_mci_reset_req_wakeup(ah);

				if (bit_position &
				    (AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING |
				     AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING))
					REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
					AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);

				REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
					  AR_MCI_INTERRUPT_RX_MSG);
			}
			break;
		}

		udelay(10);
		time_out -= 10;

		if (time_out < 0)
			break;
	}

	if (time_out <= 0) {
		ath_dbg(common, MCI,
			"MCI Wait for Reg 0x%08x = 0x%08x timeout\n",
			address, bit_position);
		ath_dbg(common, MCI,
			"MCI INT_RAW = 0x%08x, RX_MSG_RAW = 0x%08x\n",
			REG_READ(ah, AR_MCI_INTERRUPT_RAW),
			REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
		time_out = 0;
	}

	return time_out;
}

void ar9003_mci_remote_reset(struct ath_hw *ah, bool wait_done)
{
	u32 payload[4] = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffff00};

	if (!ATH9K_HW_CAP_MCI)
		return;

	ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0, payload, 16,
				wait_done, false);
	udelay(5);
}

void ar9003_mci_send_lna_transfer(struct ath_hw *ah, bool wait_done)
{
	u32 payload = 0x00000000;

	if (!ATH9K_HW_CAP_MCI)
		return;

	ar9003_mci_send_message(ah, MCI_LNA_TRANS, 0, &payload, 1,
				wait_done, false);
}

static void ar9003_mci_send_req_wake(struct ath_hw *ah, bool wait_done)
{
	ar9003_mci_send_message(ah, MCI_REQ_WAKE, MCI_FLAG_DISABLE_TIMESTAMP,
				NULL, 0, wait_done, false);
	udelay(5);
}

void ar9003_mci_send_sys_waking(struct ath_hw *ah, bool wait_done)
{
	if (!ATH9K_HW_CAP_MCI)
		return;

	ar9003_mci_send_message(ah, MCI_SYS_WAKING, MCI_FLAG_DISABLE_TIMESTAMP,
				NULL, 0, wait_done, false);
}

static void ar9003_mci_send_lna_take(struct ath_hw *ah, bool wait_done)
{
	u32 payload = 0x70000000;

	ar9003_mci_send_message(ah, MCI_LNA_TAKE, 0, &payload, 1,
				wait_done, false);
}

static void ar9003_mci_send_sys_sleeping(struct ath_hw *ah, bool wait_done)
{
	ar9003_mci_send_message(ah, MCI_SYS_SLEEPING,
				MCI_FLAG_DISABLE_TIMESTAMP,
				NULL, 0, wait_done, false);
}

static void ar9003_mci_send_coex_version_query(struct ath_hw *ah,
					       bool wait_done)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 payload[4] = {0, 0, 0, 0};

	if (!mci->bt_version_known &&
			(mci->bt_state != MCI_BT_SLEEP)) {
		ath_dbg(common, MCI, "MCI Send Coex version query\n");
		MCI_GPM_SET_TYPE_OPCODE(payload,
				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_VERSION_QUERY);
		ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
				wait_done, true);
	}
}

static void ar9003_mci_send_coex_version_response(struct ath_hw *ah,
						     bool wait_done)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 payload[4] = {0, 0, 0, 0};

	ath_dbg(common, MCI, "MCI Send Coex version response\n");
	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
			MCI_GPM_COEX_VERSION_RESPONSE);
	*(((u8 *)payload) + MCI_GPM_COEX_B_MAJOR_VERSION) =
		mci->wlan_ver_major;
	*(((u8 *)payload) + MCI_GPM_COEX_B_MINOR_VERSION) =
		mci->wlan_ver_minor;
	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
}

static void ar9003_mci_send_coex_wlan_channels(struct ath_hw *ah,
						  bool wait_done)
{
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 *payload = &mci->wlan_channels[0];

	if ((mci->wlan_channels_update == true) &&
			(mci->bt_state != MCI_BT_SLEEP)) {
		MCI_GPM_SET_TYPE_OPCODE(payload,
		MCI_GPM_COEX_AGENT, MCI_GPM_COEX_WLAN_CHANNELS);
		ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
					wait_done, true);
		MCI_GPM_SET_TYPE_OPCODE(payload, 0xff, 0xff);
	}
}

static void ar9003_mci_send_coex_bt_status_query(struct ath_hw *ah,
						bool wait_done, u8 query_type)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 payload[4] = {0, 0, 0, 0};
	bool query_btinfo = !!(query_type & (MCI_GPM_COEX_QUERY_BT_ALL_INFO |
					     MCI_GPM_COEX_QUERY_BT_TOPOLOGY));

	if (mci->bt_state != MCI_BT_SLEEP) {

		ath_dbg(common, MCI, "MCI Send Coex BT Status Query 0x%02X\n",
			query_type);

		MCI_GPM_SET_TYPE_OPCODE(payload,
				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_STATUS_QUERY);

		*(((u8 *)payload) + MCI_GPM_COEX_B_BT_BITMAP) = query_type;
		/*
		 * If bt_status_query message is  not sent successfully,
		 * then need_flush_btinfo should be set again.
		 */
		if (!ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
					     wait_done, true)) {
			if (query_btinfo) {
				mci->need_flush_btinfo = true;

				ath_dbg(common, MCI,
					"MCI send bt_status_query fail, set flush flag again\n");
			}
		}

		if (query_btinfo)
			mci->query_bt = false;
	}
}

void ar9003_mci_send_coex_halt_bt_gpm(struct ath_hw *ah, bool halt,
				      bool wait_done)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 payload[4] = {0, 0, 0, 0};

	if (!ATH9K_HW_CAP_MCI)
		return;

	ath_dbg(common, MCI, "MCI Send Coex %s BT GPM\n",
		(halt) ? "halt" : "unhalt");

	MCI_GPM_SET_TYPE_OPCODE(payload,
				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_HALT_BT_GPM);

	if (halt) {
		mci->query_bt = true;
		/* Send next unhalt no matter halt sent or not */
		mci->unhalt_bt_gpm = true;
		mci->need_flush_btinfo = true;
		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
			MCI_GPM_COEX_BT_GPM_HALT;
	} else
		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
			MCI_GPM_COEX_BT_GPM_UNHALT;

	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
}


static void ar9003_mci_prep_interface(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 saved_mci_int_en;
	u32 mci_timeout = 150;

	mci->bt_state = MCI_BT_SLEEP;
	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);

	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
		  REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
		  REG_READ(ah, AR_MCI_INTERRUPT_RAW));

	/* Remote Reset */
	ath_dbg(common, MCI, "MCI Reset sequence start\n");
	ath_dbg(common, MCI, "MCI send REMOTE_RESET\n");
	ar9003_mci_remote_reset(ah, true);

	/*
	 * This delay is required for the reset delay worst case value 255 in
	 * MCI_COMMAND2 register
	 */

	if (AR_SREV_9462_10(ah))
		udelay(252);

	ath_dbg(common, MCI, "MCI Send REQ_WAKE to remoter(BT)\n");
	ar9003_mci_send_req_wake(ah, true);

	if (ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
				AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING, 500)) {

		ath_dbg(common, MCI, "MCI SYS_WAKING from remote(BT)\n");
		mci->bt_state = MCI_BT_AWAKE;

		if (AR_SREV_9462_10(ah))
			udelay(10);
		/*
		 * we don't need to send more remote_reset at this moment.
		 * If BT receive first remote_reset, then BT HW will
		 * be cleaned up and will be able to receive req_wake
		 * and BT HW will respond sys_waking.
		 * In this case, WLAN will receive BT's HW sys_waking.
		 * Otherwise, if BT SW missed initial remote_reset,
		 * that remote_reset will still clean up BT MCI RX,
		 * and the req_wake will wake BT up,
		 * and BT SW will respond this req_wake with a remote_reset and
		 * sys_waking. In this case, WLAN will receive BT's SW
		 * sys_waking. In either case, BT's RX is cleaned up. So we
		 * don't need to reply BT's remote_reset now, if any.
		 * Similarly, if in any case, WLAN can receive BT's sys_waking,
		 * that means WLAN's RX is also fine.
		 */

		/* Send SYS_WAKING to BT */

		ath_dbg(common, MCI, "MCI send SW SYS_WAKING to remote BT\n");

		ar9003_mci_send_sys_waking(ah, true);
		udelay(10);

		/*
		 * Set BT priority interrupt value to be 0xff to
		 * avoid having too many BT PRIORITY interrupts.
		 */

		REG_WRITE(ah, AR_MCI_BT_PRI0, 0xFFFFFFFF);
		REG_WRITE(ah, AR_MCI_BT_PRI1, 0xFFFFFFFF);
		REG_WRITE(ah, AR_MCI_BT_PRI2, 0xFFFFFFFF);
		REG_WRITE(ah, AR_MCI_BT_PRI3, 0xFFFFFFFF);
		REG_WRITE(ah, AR_MCI_BT_PRI, 0X000000FF);

		/*
		 * A contention reset will be received after send out
		 * sys_waking. Also BT priority interrupt bits will be set.
		 * Clear those bits before the next step.
		 */

		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
			  AR_MCI_INTERRUPT_RX_MSG_CONT_RST);
		REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
			  AR_MCI_INTERRUPT_BT_PRI);

		if (AR_SREV_9462_10(ah) || mci->is_2g) {
			/* Send LNA_TRANS */
			ath_dbg(common, MCI, "MCI send LNA_TRANS to BT\n");
			ar9003_mci_send_lna_transfer(ah, true);
			udelay(5);
		}

		if (AR_SREV_9462_10(ah) || (mci->is_2g &&
					    !mci->update_2g5g)) {
			if (ar9003_mci_wait_for_interrupt(ah,
				AR_MCI_INTERRUPT_RX_MSG_RAW,
				AR_MCI_INTERRUPT_RX_MSG_LNA_INFO,
				mci_timeout))
				ath_dbg(common, MCI,
					"MCI WLAN has control over the LNA & BT obeys it\n");
			else
				ath_dbg(common, MCI,
					"MCI BT didn't respond to LNA_TRANS\n");
		}

		if (AR_SREV_9462_10(ah)) {
			/* Send another remote_reset to deassert BT clk_req. */
			ath_dbg(common, MCI,
				"MCI another remote_reset to deassert clk_req\n");
			ar9003_mci_remote_reset(ah, true);
			udelay(252);
		}
	}

	/* Clear the extra redundant SYS_WAKING from BT */
	if ((mci->bt_state == MCI_BT_AWAKE) &&
		(REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
				AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING)) &&
		(REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
				AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) == 0)) {

			REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
				  AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING);
			REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
				  AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);
	}

	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
}

void ar9003_mci_disable_interrupt(struct ath_hw *ah)
{
	if (!ATH9K_HW_CAP_MCI)
		return;

	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN, 0);
}

void ar9003_mci_enable_interrupt(struct ath_hw *ah)
{
	if (!ATH9K_HW_CAP_MCI)
		return;

	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, AR_MCI_INTERRUPT_DEFAULT);
	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN,
		  AR_MCI_INTERRUPT_RX_MSG_DEFAULT);
}

bool ar9003_mci_check_int(struct ath_hw *ah, u32 ints)
{
	u32 intr;

	if (!ATH9K_HW_CAP_MCI)
		return false;

	intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
	return ((intr & ints) == ints);
}

void ar9003_mci_get_interrupt(struct ath_hw *ah, u32 *raw_intr,
			      u32 *rx_msg_intr)
{
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;

	if (!ATH9K_HW_CAP_MCI)
		return;

	*raw_intr = mci->raw_intr;
	*rx_msg_intr = mci->rx_msg_intr;

	/* Clean int bits after the values are read. */
	mci->raw_intr = 0;
	mci->rx_msg_intr = 0;
}
EXPORT_SYMBOL(ar9003_mci_get_interrupt);

void ar9003_mci_2g5g_changed(struct ath_hw *ah, bool is_2g)
{
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;

	if (!ATH9K_HW_CAP_MCI)
		return;

	if (!mci->update_2g5g &&
	    (mci->is_2g != is_2g))
		mci->update_2g5g = true;

	mci->is_2g = is_2g;
}

static bool ar9003_mci_is_gpm_valid(struct ath_hw *ah, u32 msg_index)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 *payload;
	u32 recv_type, offset;

	if (msg_index == MCI_GPM_INVALID)
		return false;

	offset = msg_index << 4;

	payload = (u32 *)(mci->gpm_buf + offset);
	recv_type = MCI_GPM_TYPE(payload);

	if (recv_type == MCI_GPM_RSVD_PATTERN) {
		ath_dbg(common, MCI, "MCI Skip RSVD GPM\n");
		return false;
	}

	return true;
}

static void ar9003_mci_observation_set_up(struct ath_hw *ah)
{
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	if (mci->config & ATH_MCI_CONFIG_MCI_OBS_MCI) {

		ath9k_hw_cfg_output(ah, 3,
					AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_DATA);
		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_CLK);
		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);

	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_TXRX) {

		ath9k_hw_cfg_output(ah, 3, AR_GPIO_OUTPUT_MUX_AS_WL_IN_TX);
		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_WL_IN_RX);
		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
		ath9k_hw_cfg_output(ah, 5, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);

	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_BT) {

		ath9k_hw_cfg_output(ah, 3, AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);

	} else
		return;

	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, AR_GPIO_JTAG_DISABLE);

	if (AR_SREV_9462_20_OR_LATER(ah)) {
		REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL,
			      AR_GLB_DS_JTAG_DISABLE, 1);
		REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL,
			      AR_GLB_WLAN_UART_INTF_EN, 0);
		REG_SET_BIT(ah, AR_GLB_GPIO_CONTROL,
			    ATH_MCI_CONFIG_MCI_OBS_GPIO);
	}

	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_GPIO_OBS_SEL, 0);
	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_MAC_BB_OBS_SEL, 1);
	REG_WRITE(ah, AR_OBS, 0x4b);
	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL1, 0x03);
	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL2, 0x01);
	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_LSB, 0x02);
	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_MSB, 0x03);
	REG_RMW_FIELD(ah, AR_PHY_TEST_CTL_STATUS,
		      AR_PHY_TEST_CTL_DEBUGPORT_SEL, 0x07);
}

static bool ar9003_mci_send_coex_bt_flags(struct ath_hw *ah, bool wait_done,
						u8 opcode, u32 bt_flags)
{
	struct ath_common *common = ath9k_hw_common(ah);
	u32 pld[4] = {0, 0, 0, 0};

	MCI_GPM_SET_TYPE_OPCODE(pld,
			MCI_GPM_COEX_AGENT, MCI_GPM_COEX_BT_UPDATE_FLAGS);

	*(((u8 *)pld) + MCI_GPM_COEX_B_BT_FLAGS_OP)  = opcode;
	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 0) = bt_flags & 0xFF;
	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 1) = (bt_flags >> 8) & 0xFF;
	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 2) = (bt_flags >> 16) & 0xFF;
	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 3) = (bt_flags >> 24) & 0xFF;

	ath_dbg(common, MCI,
		"MCI BT_MCI_FLAGS: Send Coex BT Update Flags %s 0x%08x\n",
		opcode == MCI_GPM_COEX_BT_FLAGS_READ ? "READ" :
		opcode == MCI_GPM_COEX_BT_FLAGS_SET ? "SET" : "CLEAR",
		bt_flags);

	return ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16,
							wait_done, true);
}

void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g,
		      bool is_full_sleep)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 regval, thresh;

	if (!ATH9K_HW_CAP_MCI)
		return;

	ath_dbg(common, MCI, "MCI full_sleep = %d, is_2g = %d\n",
		is_full_sleep, is_2g);

	/*
	 * GPM buffer and scheduling message buffer are not allocated
	 */

	if (!mci->gpm_addr && !mci->sched_addr) {
		ath_dbg(common, MCI,
			"MCI GPM and schedule buffers are not allocated\n");
		return;
	}

	if (REG_READ(ah, AR_BTCOEX_CTRL) == 0xdeadbeef) {
		ath_dbg(common, MCI, "MCI it's deadbeef, quit mci_reset\n");
		return;
	}

	/* Program MCI DMA related registers */
	REG_WRITE(ah, AR_MCI_GPM_0, mci->gpm_addr);
	REG_WRITE(ah, AR_MCI_GPM_1, mci->gpm_len);
	REG_WRITE(ah, AR_MCI_SCHD_TABLE_0, mci->sched_addr);

	/*
	* To avoid MCI state machine be affected by incoming remote MCI msgs,
	* MCI mode will be enabled later, right before reset the MCI TX and RX.
	*/

	regval = SM(1, AR_BTCOEX_CTRL_AR9462_MODE) |
		 SM(1, AR_BTCOEX_CTRL_WBTIMER_EN) |
		 SM(1, AR_BTCOEX_CTRL_PA_SHARED) |
		 SM(1, AR_BTCOEX_CTRL_LNA_SHARED) |
		 SM(2, AR_BTCOEX_CTRL_NUM_ANTENNAS) |
		 SM(3, AR_BTCOEX_CTRL_RX_CHAIN_MASK) |
		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_ACK) |
		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_BCN) |
		 SM(0, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);

	if (is_2g && (AR_SREV_9462_20(ah)) &&
		!(mci->config & ATH_MCI_CONFIG_DISABLE_OSLA)) {

		regval |= SM(1, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
		ath_dbg(common, MCI, "MCI sched one step look ahead\n");

		if (!(mci->config &
		      ATH_MCI_CONFIG_DISABLE_AGGR_THRESH)) {

			thresh = MS(mci->config,
				    ATH_MCI_CONFIG_AGGR_THRESH);
			thresh &= 7;
			regval |= SM(1,
				     AR_BTCOEX_CTRL_TIME_TO_NEXT_BT_THRESH_EN);
			regval |= SM(thresh, AR_BTCOEX_CTRL_AGGR_THRESH);

			REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2,
				      AR_MCI_SCHD_TABLE_2_HW_BASED, 1);
			REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2,
				      AR_MCI_SCHD_TABLE_2_MEM_BASED, 1);

		} else
			ath_dbg(common, MCI, "MCI sched aggr thresh: off\n");
	} else
		ath_dbg(common, MCI, "MCI SCHED one step look ahead off\n");

	if (AR_SREV_9462_10(ah))
		regval |= SM(1, AR_BTCOEX_CTRL_SPDT_ENABLE_10);

	REG_WRITE(ah, AR_BTCOEX_CTRL, regval);

	if (AR_SREV_9462_20(ah)) {
		REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
			    AR_BTCOEX_CTRL_SPDT_ENABLE);
		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL3,
			      AR_BTCOEX_CTRL3_CONT_INFO_TIMEOUT, 20);
	}

	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_RX_DEWEIGHT, 1);
	REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);

	thresh = MS(mci->config, ATH_MCI_CONFIG_CLK_DIV);
	REG_RMW_FIELD(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_CLK_DIV, thresh);
	REG_SET_BIT(ah, AR_BTCOEX_CTRL, AR_BTCOEX_CTRL_MCI_MODE_EN);

	/* Resetting the Rx and Tx paths of MCI */
	regval = REG_READ(ah, AR_MCI_COMMAND2);
	regval |= SM(1, AR_MCI_COMMAND2_RESET_TX);
	REG_WRITE(ah, AR_MCI_COMMAND2, regval);

	udelay(1);

	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_TX);
	REG_WRITE(ah, AR_MCI_COMMAND2, regval);

	if (is_full_sleep) {
		ar9003_mci_mute_bt(ah);
		udelay(100);
	}

	regval |= SM(1, AR_MCI_COMMAND2_RESET_RX);
	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
	udelay(1);
	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_RX);
	REG_WRITE(ah, AR_MCI_COMMAND2, regval);

	ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET, NULL);
	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE,
		  (SM(0xe801, AR_MCI_MSG_ATTRIBUTES_TABLE_INVALID_HDR) |
		   SM(0x0000, AR_MCI_MSG_ATTRIBUTES_TABLE_CHECKSUM)));

	REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
			AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);

	if (AR_SREV_9462_20_OR_LATER(ah))
		ar9003_mci_observation_set_up(ah);

	mci->ready = true;
	ar9003_mci_prep_interface(ah);

	if (en_int)
		ar9003_mci_enable_interrupt(ah);
}

void ar9003_mci_mute_bt(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);

	if (!ATH9K_HW_CAP_MCI)
		return;

	/* disable all MCI messages */
	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE, 0xffff0000);
	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS0, 0xffffffff);
	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS1, 0xffffffff);
	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS2, 0xffffffff);
	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS3, 0xffffffff);
	REG_SET_BIT(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);

	/* wait pending HW messages to flush out */
	udelay(10);

	/*
	 * Send LNA_TAKE and SYS_SLEEPING when
	 * 1. reset not after resuming from full sleep
	 * 2. before reset MCI RX, to quiet BT and avoid MCI RX misalignment
	 */

	ath_dbg(common, MCI, "MCI Send LNA take\n");
	ar9003_mci_send_lna_take(ah, true);

	udelay(5);

	ath_dbg(common, MCI, "MCI Send sys sleeping\n");
	ar9003_mci_send_sys_sleeping(ah, true);
}

void ar9003_mci_sync_bt_state(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 cur_bt_state;

	if (!ATH9K_HW_CAP_MCI)
		return;

	cur_bt_state = ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL);

	if (mci->bt_state != cur_bt_state) {
		ath_dbg(common, MCI,
			"MCI BT state mismatches. old: %d, new: %d\n",
			mci->bt_state, cur_bt_state);
		mci->bt_state = cur_bt_state;
	}

	if (mci->bt_state != MCI_BT_SLEEP) {

		ar9003_mci_send_coex_version_query(ah, true);
		ar9003_mci_send_coex_wlan_channels(ah, true);

		if (mci->unhalt_bt_gpm == true) {
			ath_dbg(common, MCI, "MCI unhalt BT GPM\n");
			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
		}
	}
}

static void ar9003_mci_send_2g5g_status(struct ath_hw *ah, bool wait_done)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 new_flags, to_set, to_clear;

	if (AR_SREV_9462_20(ah) &&
	    mci->update_2g5g &&
	    (mci->bt_state != MCI_BT_SLEEP)) {

		if (mci->is_2g) {
			new_flags = MCI_2G_FLAGS;
			to_clear = MCI_2G_FLAGS_CLEAR_MASK;
			to_set = MCI_2G_FLAGS_SET_MASK;
		} else {
			new_flags = MCI_5G_FLAGS;
			to_clear = MCI_5G_FLAGS_CLEAR_MASK;
			to_set = MCI_5G_FLAGS_SET_MASK;
		}

		ath_dbg(common, MCI,
			"MCI BT_MCI_FLAGS: %s 0x%08x clr=0x%08x, set=0x%08x\n",
		mci->is_2g ? "2G" : "5G", new_flags, to_clear, to_set);

		if (to_clear)
			ar9003_mci_send_coex_bt_flags(ah, wait_done,
					MCI_GPM_COEX_BT_FLAGS_CLEAR, to_clear);

		if (to_set)
			ar9003_mci_send_coex_bt_flags(ah, wait_done,
					MCI_GPM_COEX_BT_FLAGS_SET, to_set);
	}

	if (AR_SREV_9462_10(ah) && (mci->bt_state != MCI_BT_SLEEP))
		mci->update_2g5g = false;
}

static void ar9003_mci_queue_unsent_gpm(struct ath_hw *ah, u8 header,
					u32 *payload, bool queue)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u8 type, opcode;

	if (queue) {

		if (payload)
			ath_dbg(common, MCI,
				"MCI ERROR: Send fail: %02x: %02x %02x %02x\n",
				header,
				*(((u8 *)payload) + 4),
				*(((u8 *)payload) + 5),
				*(((u8 *)payload) + 6));
		else
			ath_dbg(common, MCI, "MCI ERROR: Send fail: %02x\n",
				header);
	}

	/* check if the message is to be queued */
	if (header != MCI_GPM)
		return;

	type = MCI_GPM_TYPE(payload);
	opcode = MCI_GPM_OPCODE(payload);

	if (type != MCI_GPM_COEX_AGENT)
		return;

	switch (opcode) {
	case MCI_GPM_COEX_BT_UPDATE_FLAGS:

		if (AR_SREV_9462_10(ah))
			break;

		if (*(((u8 *)payload) + MCI_GPM_COEX_B_BT_FLAGS_OP) ==
				MCI_GPM_COEX_BT_FLAGS_READ)
			break;

		mci->update_2g5g = queue;

		if (queue)
			ath_dbg(common, MCI,
				"MCI BT_MCI_FLAGS: 2G5G status <queued> %s\n",
				mci->is_2g ? "2G" : "5G");
		else
			ath_dbg(common, MCI,
				"MCI BT_MCI_FLAGS: 2G5G status <sent> %s\n",
				mci->is_2g ? "2G" : "5G");

		break;

	case MCI_GPM_COEX_WLAN_CHANNELS:

		mci->wlan_channels_update = queue;
		if (queue)
			ath_dbg(common, MCI, "MCI WLAN channel map <queued>\n");
		else
			ath_dbg(common, MCI, "MCI WLAN channel map <sent>\n");
		break;

	case MCI_GPM_COEX_HALT_BT_GPM:

		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
				MCI_GPM_COEX_BT_GPM_UNHALT) {

			mci->unhalt_bt_gpm = queue;

			if (queue)
				ath_dbg(common, MCI,
					"MCI UNHALT BT GPM <queued>\n");
			else {
				mci->halted_bt_gpm = false;
				ath_dbg(common, MCI,
					"MCI UNHALT BT GPM <sent>\n");
			}
		}

		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
				MCI_GPM_COEX_BT_GPM_HALT) {

			mci->halted_bt_gpm = !queue;

			if (queue)
				ath_dbg(common, MCI,
					"MCI HALT BT GPM <not sent>\n");
			else
				ath_dbg(common, MCI,
					"MCI UNHALT BT GPM <sent>\n");
		}

		break;
	default:
		break;
	}
}

void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool wait_done)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;

	if (!ATH9K_HW_CAP_MCI)
		return;

	if (mci->update_2g5g) {
		if (mci->is_2g) {

			ar9003_mci_send_2g5g_status(ah, true);
			ath_dbg(common, MCI, "MCI Send LNA trans\n");
			ar9003_mci_send_lna_transfer(ah, true);
			udelay(5);

			REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
				    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);

			if (AR_SREV_9462_20(ah)) {
				REG_CLR_BIT(ah, AR_PHY_GLB_CONTROL,
					    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
				if (!(mci->config &
				      ATH_MCI_CONFIG_DISABLE_OSLA)) {
					REG_SET_BIT(ah, AR_BTCOEX_CTRL,
					AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
				}
			}
		} else {
			ath_dbg(common, MCI, "MCI Send LNA take\n");
			ar9003_mci_send_lna_take(ah, true);
			udelay(5);

			REG_SET_BIT(ah, AR_MCI_TX_CTRL,
				    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);

			if (AR_SREV_9462_20(ah)) {
				REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
					    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
				REG_CLR_BIT(ah, AR_BTCOEX_CTRL,
					AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
			}

			ar9003_mci_send_2g5g_status(ah, true);
		}
	}
}

bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag,
			     u32 *payload, u8 len, bool wait_done,
			     bool check_bt)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	bool msg_sent = false;
	u32 regval;
	u32 saved_mci_int_en;
	int i;

	if (!ATH9K_HW_CAP_MCI)
		return false;

	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
	regval = REG_READ(ah, AR_BTCOEX_CTRL);

	if ((regval == 0xdeadbeef) || !(regval & AR_BTCOEX_CTRL_MCI_MODE_EN)) {

		ath_dbg(common, MCI,
			"MCI Not sending 0x%x. MCI is not enabled. full_sleep = %d\n",
			header,
			(ah->power_mode == ATH9K_PM_FULL_SLEEP) ? 1 : 0);

		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
		return false;

	} else if (check_bt && (mci->bt_state == MCI_BT_SLEEP)) {

		ath_dbg(common, MCI,
			"MCI Don't send message 0x%x. BT is in sleep state\n",
			header);

		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
		return false;
	}

	if (wait_done)
		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);

	/* Need to clear SW_MSG_DONE raw bit before wait */

	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
		  (AR_MCI_INTERRUPT_SW_MSG_DONE |
		   AR_MCI_INTERRUPT_MSG_FAIL_MASK));

	if (payload) {
		for (i = 0; (i * 4) < len; i++)
			REG_WRITE(ah, (AR_MCI_TX_PAYLOAD0 + i * 4),
				  *(payload + i));
	}

	REG_WRITE(ah, AR_MCI_COMMAND0,
		  (SM((flag & MCI_FLAG_DISABLE_TIMESTAMP),
		      AR_MCI_COMMAND0_DISABLE_TIMESTAMP) |
		   SM(len, AR_MCI_COMMAND0_LEN) |
		   SM(header, AR_MCI_COMMAND0_HEADER)));

	if (wait_done &&
	    !(ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RAW,
					AR_MCI_INTERRUPT_SW_MSG_DONE, 500)))
		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
	else {
		ar9003_mci_queue_unsent_gpm(ah, header, payload, false);
		msg_sent = true;
	}

	if (wait_done)
		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);

	return msg_sent;
}
EXPORT_SYMBOL(ar9003_mci_send_message);

void ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf,
		      u16 len, u32 sched_addr)
{
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	void *sched_buf = (void *)((char *) gpm_buf + (sched_addr - gpm_addr));

	if (!ATH9K_HW_CAP_MCI)
		return;

	mci->gpm_addr = gpm_addr;
	mci->gpm_buf = gpm_buf;
	mci->gpm_len = len;
	mci->sched_addr = sched_addr;
	mci->sched_buf = sched_buf;

	ar9003_mci_reset(ah, true, true, true);
}
EXPORT_SYMBOL(ar9003_mci_setup);

void ar9003_mci_cleanup(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);

	if (!ATH9K_HW_CAP_MCI)
		return;

	/* Turn off MCI and Jupiter mode. */
	REG_WRITE(ah, AR_BTCOEX_CTRL, 0x00);
	ath_dbg(common, MCI, "MCI ar9003_mci_cleanup\n");
	ar9003_mci_disable_interrupt(ah);
}
EXPORT_SYMBOL(ar9003_mci_cleanup);

static void ar9003_mci_process_gpm_extra(struct ath_hw *ah, u8 gpm_type,
					 u8 gpm_opcode, u32 *p_gpm)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u8 *p_data = (u8 *) p_gpm;

	if (gpm_type != MCI_GPM_COEX_AGENT)
		return;

	switch (gpm_opcode) {
	case MCI_GPM_COEX_VERSION_QUERY:
		ath_dbg(common, MCI, "MCI Recv GPM COEX Version Query\n");
		ar9003_mci_send_coex_version_response(ah, true);
		break;
	case MCI_GPM_COEX_VERSION_RESPONSE:
		ath_dbg(common, MCI, "MCI Recv GPM COEX Version Response\n");
		mci->bt_ver_major =
			*(p_data + MCI_GPM_COEX_B_MAJOR_VERSION);
		mci->bt_ver_minor =
			*(p_data + MCI_GPM_COEX_B_MINOR_VERSION);
		mci->bt_version_known = true;
		ath_dbg(common, MCI, "MCI BT Coex version: %d.%d\n",
			mci->bt_ver_major, mci->bt_ver_minor);
		break;
	case MCI_GPM_COEX_STATUS_QUERY:
		ath_dbg(common, MCI,
			"MCI Recv GPM COEX Status Query = 0x%02X\n",
			*(p_data + MCI_GPM_COEX_B_WLAN_BITMAP));
		mci->wlan_channels_update = true;
		ar9003_mci_send_coex_wlan_channels(ah, true);
		break;
	case MCI_GPM_COEX_BT_PROFILE_INFO:
		mci->query_bt = true;
		ath_dbg(common, MCI, "MCI Recv GPM COEX BT_Profile_Info\n");
		break;
	case MCI_GPM_COEX_BT_STATUS_UPDATE:
		mci->query_bt = true;
		ath_dbg(common, MCI,
			"MCI Recv GPM COEX BT_Status_Update SEQ=%d (drop&query)\n",
			*(p_gpm + 3));
		break;
	default:
		break;
	}
}

u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
			    u8 gpm_opcode, int time_out)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 *p_gpm = NULL, mismatch = 0, more_data;
	u32 offset;
	u8 recv_type = 0, recv_opcode = 0;
	bool b_is_bt_cal_done = (gpm_type == MCI_GPM_BT_CAL_DONE);

	if (!ATH9K_HW_CAP_MCI)
		return 0;

	more_data = time_out ? MCI_GPM_NOMORE : MCI_GPM_MORE;

	while (time_out > 0) {
		if (p_gpm) {
			MCI_GPM_RECYCLE(p_gpm);
			p_gpm = NULL;
		}

		if (more_data != MCI_GPM_MORE)
			time_out = ar9003_mci_wait_for_interrupt(ah,
					AR_MCI_INTERRUPT_RX_MSG_RAW,
					AR_MCI_INTERRUPT_RX_MSG_GPM,
					time_out);

		if (!time_out)
			break;

		offset = ar9003_mci_state(ah,
				MCI_STATE_NEXT_GPM_OFFSET, &more_data);

		if (offset == MCI_GPM_INVALID)
			continue;

		p_gpm = (u32 *) (mci->gpm_buf + offset);
		recv_type = MCI_GPM_TYPE(p_gpm);
		recv_opcode = MCI_GPM_OPCODE(p_gpm);

		if (MCI_GPM_IS_CAL_TYPE(recv_type)) {

			if (recv_type == gpm_type) {

				if ((gpm_type == MCI_GPM_BT_CAL_DONE) &&
				    !b_is_bt_cal_done) {
					gpm_type = MCI_GPM_BT_CAL_GRANT;
					ath_dbg(common, MCI,
						"MCI Recv BT_CAL_DONE wait BT_CAL_GRANT\n");
					continue;
				}

				break;
			}
		} else if ((recv_type == gpm_type) &&
			   (recv_opcode == gpm_opcode))
			break;

		/* not expected message */

		/*
		 * check if it's cal_grant
		 *
		 * When we're waiting for cal_grant in reset routine,
		 * it's possible that BT sends out cal_request at the
		 * same time. Since BT's calibration doesn't happen
		 * that often, we'll let BT completes calibration then
		 * we continue to wait for cal_grant from BT.
		 * Orginal: Wait BT_CAL_GRANT.
		 * New: Receive BT_CAL_REQ -> send WLAN_CAL_GRANT->wait
		 * BT_CAL_DONE -> Wait BT_CAL_GRANT.
		 */

		if ((gpm_type == MCI_GPM_BT_CAL_GRANT) &&
		    (recv_type == MCI_GPM_BT_CAL_REQ)) {

			u32 payload[4] = {0, 0, 0, 0};

			gpm_type = MCI_GPM_BT_CAL_DONE;
			ath_dbg(common, MCI,
				"MCI Rcv BT_CAL_REQ, send WLAN_CAL_GRANT\n");

			MCI_GPM_SET_CAL_TYPE(payload,
					MCI_GPM_WLAN_CAL_GRANT);

			ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
						false, false);

			ath_dbg(common, MCI, "MCI now wait for BT_CAL_DONE\n");

			continue;
		} else {
			ath_dbg(common, MCI, "MCI GPM subtype not match 0x%x\n",
				*(p_gpm + 1));
			mismatch++;
			ar9003_mci_process_gpm_extra(ah, recv_type,
					recv_opcode, p_gpm);
		}
	}
	if (p_gpm) {
		MCI_GPM_RECYCLE(p_gpm);
		p_gpm = NULL;
	}

	if (time_out <= 0) {
		time_out = 0;
		ath_dbg(common, MCI,
			"MCI GPM received timeout, mismatch = %d\n", mismatch);
	} else
		ath_dbg(common, MCI, "MCI Receive GPM type=0x%x, code=0x%x\n",
			gpm_type, gpm_opcode);

	while (more_data == MCI_GPM_MORE) {

		ath_dbg(common, MCI, "MCI discard remaining GPM\n");
		offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
					  &more_data);

		if (offset == MCI_GPM_INVALID)
			break;

		p_gpm = (u32 *) (mci->gpm_buf + offset);
		recv_type = MCI_GPM_TYPE(p_gpm);
		recv_opcode = MCI_GPM_OPCODE(p_gpm);

		if (!MCI_GPM_IS_CAL_TYPE(recv_type))
			ar9003_mci_process_gpm_extra(ah, recv_type,
						     recv_opcode, p_gpm);

		MCI_GPM_RECYCLE(p_gpm);
	}

	return time_out;
}

u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type, u32 *p_data)
{
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
	u32 value = 0, more_gpm = 0, gpm_ptr;
	u8 query_type;

	if (!ATH9K_HW_CAP_MCI)
		return 0;

	switch (state_type) {
	case MCI_STATE_ENABLE:
		if (mci->ready) {

			value = REG_READ(ah, AR_BTCOEX_CTRL);

			if ((value == 0xdeadbeef) || (value == 0xffffffff))
				value = 0;
		}
		value &= AR_BTCOEX_CTRL_MCI_MODE_EN;
		break;
	case MCI_STATE_INIT_GPM_OFFSET:
		value = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
		ath_dbg(common, MCI, "MCI GPM initial WRITE_PTR=%d\n", value);
		mci->gpm_idx = value;
		break;
	case MCI_STATE_NEXT_GPM_OFFSET:
	case MCI_STATE_LAST_GPM_OFFSET:
		/*
		* This could be useful to avoid new GPM message interrupt which
		* may lead to spurious interrupt after power sleep, or multiple
		* entry of ath_mci_intr().
		* Adding empty GPM check by returning HAL_MCI_GPM_INVALID can
		* alleviate this effect, but clearing GPM RX interrupt bit is
		* safe, because whether this is called from hw or driver code
		* there must be an interrupt bit set/triggered initially
		*/
		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
			  AR_MCI_INTERRUPT_RX_MSG_GPM);

		gpm_ptr = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
		value = gpm_ptr;

		if (value == 0)
			value = mci->gpm_len - 1;
		else if (value >= mci->gpm_len) {
			if (value != 0xFFFF) {
				value = 0;
				ath_dbg(common, MCI,
					"MCI GPM offset out of range\n");
			}
		} else
			value--;

		if (value == 0xFFFF) {
			value = MCI_GPM_INVALID;
			more_gpm = MCI_GPM_NOMORE;
			ath_dbg(common, MCI,
				"MCI GPM ptr invalid @ptr=%d, offset=%d, more=GPM_NOMORE\n",
				gpm_ptr, value);
		} else if (state_type == MCI_STATE_NEXT_GPM_OFFSET) {

			if (gpm_ptr == mci->gpm_idx) {
				value = MCI_GPM_INVALID;
				more_gpm = MCI_GPM_NOMORE;

				ath_dbg(common, MCI,
					"MCI GPM message not available @ptr=%d, @offset=%d, more=GPM_NOMORE\n",
					gpm_ptr, value);
			} else {
				for (;;) {

					u32 temp_index;

					/* skip reserved GPM if any */

					if (value != mci->gpm_idx)
						more_gpm = MCI_GPM_MORE;
					else
						more_gpm = MCI_GPM_NOMORE;

					temp_index = mci->gpm_idx;
					mci->gpm_idx++;

					if (mci->gpm_idx >=
					    mci->gpm_len)
						mci->gpm_idx = 0;

					ath_dbg(common, MCI,
						"MCI GPM message got ptr=%d, @offset=%d, more=%d\n",
						gpm_ptr, temp_index,
						(more_gpm == MCI_GPM_MORE));

					if (ar9003_mci_is_gpm_valid(ah,
								temp_index)) {
						value = temp_index;
						break;
					}

					if (more_gpm == MCI_GPM_NOMORE) {
						value = MCI_GPM_INVALID;
						break;
					}
				}
			}
			if (p_data)
				*p_data = more_gpm;
			}

			if (value != MCI_GPM_INVALID)
				value <<= 4;

			break;
	case MCI_STATE_LAST_SCHD_MSG_OFFSET:
		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
				    AR_MCI_RX_LAST_SCHD_MSG_INDEX);
		/* Make it in bytes */
		value <<= 4;
		break;

	case MCI_STATE_REMOTE_SLEEP:
		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
			   AR_MCI_RX_REMOTE_SLEEP) ?
			MCI_BT_SLEEP : MCI_BT_AWAKE;
		break;

	case MCI_STATE_CONT_RSSI_POWER:
		value = MS(mci->cont_status, AR_MCI_CONT_RSSI_POWER);
			break;

	case MCI_STATE_CONT_PRIORITY:
		value = MS(mci->cont_status, AR_MCI_CONT_RRIORITY);
		break;

	case MCI_STATE_CONT_TXRX:
		value = MS(mci->cont_status, AR_MCI_CONT_TXRX);
		break;

	case MCI_STATE_BT:
		value = mci->bt_state;
		break;

	case MCI_STATE_SET_BT_SLEEP:
		mci->bt_state = MCI_BT_SLEEP;
		break;

	case MCI_STATE_SET_BT_AWAKE:
		mci->bt_state = MCI_BT_AWAKE;
		ar9003_mci_send_coex_version_query(ah, true);
		ar9003_mci_send_coex_wlan_channels(ah, true);

		if (mci->unhalt_bt_gpm) {

			ath_dbg(common, MCI, "MCI unhalt BT GPM\n");
			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
		}

		ar9003_mci_2g5g_switch(ah, true);
		break;

	case MCI_STATE_SET_BT_CAL_START:
		mci->bt_state = MCI_BT_CAL_START;
		break;

	case MCI_STATE_SET_BT_CAL:
		mci->bt_state = MCI_BT_CAL;
		break;

	case MCI_STATE_RESET_REQ_WAKE:
		ar9003_mci_reset_req_wakeup(ah);
		mci->update_2g5g = true;

		if ((AR_SREV_9462_20_OR_LATER(ah)) &&
		    (mci->config & ATH_MCI_CONFIG_MCI_OBS_MASK)) {
			/* Check if we still have control of the GPIOs */
			if ((REG_READ(ah, AR_GLB_GPIO_CONTROL) &
				      ATH_MCI_CONFIG_MCI_OBS_GPIO) !=
					ATH_MCI_CONFIG_MCI_OBS_GPIO) {

				ath_dbg(common, MCI,
					"MCI reconfigure observation\n");
				ar9003_mci_observation_set_up(ah);
			}
		}
		break;

	case MCI_STATE_SEND_WLAN_COEX_VERSION:
		ar9003_mci_send_coex_version_response(ah, true);
		break;

	case MCI_STATE_SET_BT_COEX_VERSION:

		if (!p_data)
			ath_dbg(common, MCI,
				"MCI Set BT Coex version with NULL data!!\n");
		else {
			mci->bt_ver_major = (*p_data >> 8) & 0xff;
			mci->bt_ver_minor = (*p_data) & 0xff;
			mci->bt_version_known = true;
			ath_dbg(common, MCI, "MCI BT version set: %d.%d\n",
				mci->bt_ver_major, mci->bt_ver_minor);
		}
		break;

	case MCI_STATE_SEND_WLAN_CHANNELS:
		if (p_data) {
			if (((mci->wlan_channels[1] & 0xffff0000) ==
			     (*(p_data + 1) & 0xffff0000)) &&
			    (mci->wlan_channels[2] == *(p_data + 2)) &&
			    (mci->wlan_channels[3] == *(p_data + 3)))
				break;

			mci->wlan_channels[0] = *p_data++;
			mci->wlan_channels[1] = *p_data++;
			mci->wlan_channels[2] = *p_data++;
			mci->wlan_channels[3] = *p_data++;
		}
		mci->wlan_channels_update = true;
		ar9003_mci_send_coex_wlan_channels(ah, true);
		break;

	case MCI_STATE_SEND_VERSION_QUERY:
		ar9003_mci_send_coex_version_query(ah, true);
		break;

	case MCI_STATE_SEND_STATUS_QUERY:
		query_type = (AR_SREV_9462_10(ah)) ?
				MCI_GPM_COEX_QUERY_BT_ALL_INFO :
				MCI_GPM_COEX_QUERY_BT_TOPOLOGY;

		ar9003_mci_send_coex_bt_status_query(ah, true, query_type);
		break;

	case MCI_STATE_NEED_FLUSH_BT_INFO:
			/*
			 * btcoex_hw.mci.unhalt_bt_gpm means whether it's
			 * needed to send UNHALT message. It's set whenever
			 * there's a request to send HALT message.
			 * mci_halted_bt_gpm means whether HALT message is sent
			 * out successfully.
			 *
			 * Checking (mci_unhalt_bt_gpm == false) instead of
			 * checking (ah->mci_halted_bt_gpm == false) will make
			 * sure currently is in UNHALT-ed mode and BT can
			 * respond to status query.
			 */
			value = (!mci->unhalt_bt_gpm &&
				 mci->need_flush_btinfo) ? 1 : 0;
			if (p_data)
				mci->need_flush_btinfo =
					(*p_data != 0) ? true : false;
			break;

	case MCI_STATE_RECOVER_RX:

		ath_dbg(common, MCI, "MCI hw RECOVER_RX\n");
		ar9003_mci_prep_interface(ah);
		mci->query_bt = true;
		mci->need_flush_btinfo = true;
		ar9003_mci_send_coex_wlan_channels(ah, true);
		ar9003_mci_2g5g_switch(ah, true);
		break;

	case MCI_STATE_NEED_FTP_STOMP:
		value = !(mci->config & ATH_MCI_CONFIG_DISABLE_FTP_STOMP);
		break;

	case MCI_STATE_NEED_TUNING:
		value = !(mci->config & ATH_MCI_CONFIG_DISABLE_TUNING);
		break;

	default:
		break;

	}

	return value;
}
EXPORT_SYMBOL(ar9003_mci_state);