File: mac80211_if.c

package info (click to toggle)
linux 4.9.189-3
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 835,376 kB
  • sloc: ansic: 14,523,990; asm: 288,915; makefile: 35,290; perl: 27,555; sh: 17,017; python: 13,389; cpp: 6,102; yacc: 4,354; lex: 2,441; awk: 1,212; pascal: 231; lisp: 218; sed: 21
file content (1696 lines) | stat: -rw-r--r-- 43,206 bytes parent folder | download | duplicates (8)
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
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
/*
 * Copyright (c) 2010 Broadcom Corporation
 * Copyright (c) 2013 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * 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.
 */

#define __UNDEF_NO_VERSION__
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/etherdevice.h>
#include <linux/sched.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/bcma/bcma.h>
#include <net/mac80211.h>
#include <defs.h>
#include "phy/phy_int.h"
#include "d11.h"
#include "channel.h"
#include "scb.h"
#include "pub.h"
#include "ucode_loader.h"
#include "mac80211_if.h"
#include "main.h"
#include "debug.h"
#include "led.h"

#define N_TX_QUEUES	4 /* #tx queues on mac80211<->driver interface */
#define BRCMS_FLUSH_TIMEOUT	500 /* msec */

/* Flags we support */
#define MAC_FILTERS (FIF_ALLMULTI | \
	FIF_FCSFAIL | \
	FIF_CONTROL | \
	FIF_OTHER_BSS | \
	FIF_BCN_PRBRESP_PROMISC | \
	FIF_PSPOLL)

#define CHAN2GHZ(channel, freqency, chflags)  { \
	.band = NL80211_BAND_2GHZ, \
	.center_freq = (freqency), \
	.hw_value = (channel), \
	.flags = chflags, \
	.max_antenna_gain = 0, \
	.max_power = 19, \
}

#define CHAN5GHZ(channel, chflags)  { \
	.band = NL80211_BAND_5GHZ, \
	.center_freq = 5000 + 5*(channel), \
	.hw_value = (channel), \
	.flags = chflags, \
	.max_antenna_gain = 0, \
	.max_power = 21, \
}

#define RATE(rate100m, _flags) { \
	.bitrate = (rate100m), \
	.flags = (_flags), \
	.hw_value = (rate100m / 5), \
}

struct firmware_hdr {
	__le32 offset;
	__le32 len;
	__le32 idx;
};

static const char * const brcms_firmwares[MAX_FW_IMAGES] = {
	"brcm/bcm43xx",
	NULL
};

static int n_adapters_found;

MODULE_AUTHOR("Broadcom Corporation");
MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver.");
MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
MODULE_LICENSE("Dual BSD/GPL");
/* This needs to be adjusted when brcms_firmwares changes */
MODULE_FIRMWARE("brcm/bcm43xx-0.fw");
MODULE_FIRMWARE("brcm/bcm43xx_hdr-0.fw");

/* recognized BCMA Core IDs */
static struct bcma_device_id brcms_coreid_table[] = {
	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 17, BCMA_ANY_CLASS),
	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 23, BCMA_ANY_CLASS),
	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 24, BCMA_ANY_CLASS),
	{},
};
MODULE_DEVICE_TABLE(bcma, brcms_coreid_table);

#if defined(CONFIG_BRCMDBG)
/*
 * Module parameter for setting the debug message level. Available
 * flags are specified by the BRCM_DL_* macros in
 * drivers/net/wireless/brcm80211/include/defs.h.
 */
module_param_named(debug, brcm_msg_level, uint, S_IRUGO | S_IWUSR);
#endif

static struct ieee80211_channel brcms_2ghz_chantable[] = {
	CHAN2GHZ(1, 2412, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN2GHZ(2, 2417, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN2GHZ(3, 2422, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN2GHZ(4, 2427, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN2GHZ(5, 2432, 0),
	CHAN2GHZ(6, 2437, 0),
	CHAN2GHZ(7, 2442, 0),
	CHAN2GHZ(8, 2447, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(9, 2452, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(10, 2457, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(11, 2462, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(12, 2467,
		 IEEE80211_CHAN_NO_IR |
		 IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(13, 2472,
		 IEEE80211_CHAN_NO_IR |
		 IEEE80211_CHAN_NO_HT40PLUS),
	CHAN2GHZ(14, 2484,
		 IEEE80211_CHAN_NO_IR |
		 IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
		 IEEE80211_CHAN_NO_OFDM)
};

static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
	/* UNII-1 */
	CHAN5GHZ(36, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(40, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(44, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(48, IEEE80211_CHAN_NO_HT40PLUS),
	/* UNII-2 */
	CHAN5GHZ(52,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(56,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(60,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(64,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	/* MID */
	CHAN5GHZ(100,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(104,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(108,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(112,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(116,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(120,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(124,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(128,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(132,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(136,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(140,
		 IEEE80211_CHAN_RADAR |
		 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS |
		 IEEE80211_CHAN_NO_HT40MINUS),
	/* UNII-3 */
	CHAN5GHZ(149, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(153, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(157, IEEE80211_CHAN_NO_HT40MINUS),
	CHAN5GHZ(161, IEEE80211_CHAN_NO_HT40PLUS),
	CHAN5GHZ(165, IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)
};

/*
 * The rate table is used for both 2.4G and 5G rates. The
 * latter being a subset as it does not support CCK rates.
 */
static struct ieee80211_rate legacy_ratetable[] = {
	RATE(10, 0),
	RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(55, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(110, IEEE80211_RATE_SHORT_PREAMBLE),
	RATE(60, 0),
	RATE(90, 0),
	RATE(120, 0),
	RATE(180, 0),
	RATE(240, 0),
	RATE(360, 0),
	RATE(480, 0),
	RATE(540, 0),
};

static const struct ieee80211_supported_band brcms_band_2GHz_nphy_template = {
	.band = NL80211_BAND_2GHZ,
	.channels = brcms_2ghz_chantable,
	.n_channels = ARRAY_SIZE(brcms_2ghz_chantable),
	.bitrates = legacy_ratetable,
	.n_bitrates = ARRAY_SIZE(legacy_ratetable),
	.ht_cap = {
		   /* from include/linux/ieee80211.h */
		   .cap = IEEE80211_HT_CAP_GRN_FLD |
			  IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40,
		   .ht_supported = true,
		   .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
		   .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
		   .mcs = {
			   /* placeholders for now */
			   .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
			   .rx_highest = cpu_to_le16(500),
			   .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
		   }
};

static const struct ieee80211_supported_band brcms_band_5GHz_nphy_template = {
	.band = NL80211_BAND_5GHZ,
	.channels = brcms_5ghz_nphy_chantable,
	.n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
	.bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
	.n_bitrates = ARRAY_SIZE(legacy_ratetable) -
			BRCMS_LEGACY_5G_RATE_OFFSET,
	.ht_cap = {
		   .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
			  IEEE80211_HT_CAP_SGI_40,
		   .ht_supported = true,
		   .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
		   .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
		   .mcs = {
			   /* placeholders for now */
			   .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
			   .rx_highest = cpu_to_le16(500),
			   .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
		   }
};

/* flags the given rate in rateset as requested */
static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
{
	u32 i;

	for (i = 0; i < rs->count; i++) {
		if (rate != (rs->rates[i] & 0x7f))
			continue;

		if (is_br)
			rs->rates[i] |= BRCMS_RATE_FLAG;
		else
			rs->rates[i] &= BRCMS_RATE_MASK;
		return;
	}
}

/**
 * This function frees the WL per-device resources.
 *
 * This function frees resources owned by the WL device pointed to
 * by the wl parameter.
 *
 * precondition: can both be called locked and unlocked
 *
 */
static void brcms_free(struct brcms_info *wl)
{
	struct brcms_timer *t, *next;

	/* free ucode data */
	if (wl->fw.fw_cnt)
		brcms_ucode_data_free(&wl->ucode);
	if (wl->irq)
		free_irq(wl->irq, wl);

	/* kill dpc */
	tasklet_kill(&wl->tasklet);

	if (wl->pub) {
		brcms_debugfs_detach(wl->pub);
		brcms_c_module_unregister(wl->pub, "linux", wl);
	}

	/* free common resources */
	if (wl->wlc) {
		brcms_c_detach(wl->wlc);
		wl->wlc = NULL;
		wl->pub = NULL;
	}

	/* virtual interface deletion is deferred so we cannot spinwait */

	/* wait for all pending callbacks to complete */
	while (atomic_read(&wl->callbacks) > 0)
		schedule();

	/* free timers */
	for (t = wl->timers; t; t = next) {
		next = t->next;
#ifdef DEBUG
		kfree(t->name);
#endif
		kfree(t);
	}
}

/*
* called from both kernel as from this kernel module (error flow on attach)
* precondition: perimeter lock is not acquired.
*/
static void brcms_remove(struct bcma_device *pdev)
{
	struct ieee80211_hw *hw = bcma_get_drvdata(pdev);
	struct brcms_info *wl = hw->priv;

	if (wl->wlc) {
		brcms_led_unregister(wl);
		wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
		wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
		ieee80211_unregister_hw(hw);
	}

	brcms_free(wl);

	bcma_set_drvdata(pdev, NULL);
	ieee80211_free_hw(hw);
}

/*
 * Precondition: Since this function is called in brcms_pci_probe() context,
 * no locking is required.
 */
static void brcms_release_fw(struct brcms_info *wl)
{
	int i;
	for (i = 0; i < MAX_FW_IMAGES; i++) {
		release_firmware(wl->fw.fw_bin[i]);
		release_firmware(wl->fw.fw_hdr[i]);
	}
}

/*
 * Precondition: Since this function is called in brcms_pci_probe() context,
 * no locking is required.
 */
static int brcms_request_fw(struct brcms_info *wl, struct bcma_device *pdev)
{
	int status;
	struct device *device = &pdev->dev;
	char fw_name[100];
	int i;

	memset(&wl->fw, 0, sizeof(struct brcms_firmware));
	for (i = 0; i < MAX_FW_IMAGES; i++) {
		if (brcms_firmwares[i] == NULL)
			break;
		sprintf(fw_name, "%s-%d.fw", brcms_firmwares[i],
			UCODE_LOADER_API_VER);
		status = request_firmware(&wl->fw.fw_bin[i], fw_name, device);
		if (status)
			return status;
		sprintf(fw_name, "%s_hdr-%d.fw", brcms_firmwares[i],
			UCODE_LOADER_API_VER);
		status = request_firmware(&wl->fw.fw_hdr[i], fw_name, device);
		if (status)
			return status;
		wl->fw.hdr_num_entries[i] =
		    wl->fw.fw_hdr[i]->size / (sizeof(struct firmware_hdr));
	}
	wl->fw.fw_cnt = i;
	status = brcms_ucode_data_init(wl, &wl->ucode);
	brcms_release_fw(wl);
	return status;
}

static void brcms_ops_tx(struct ieee80211_hw *hw,
			 struct ieee80211_tx_control *control,
			 struct sk_buff *skb)
{
	struct brcms_info *wl = hw->priv;
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);

	spin_lock_bh(&wl->lock);
	if (!wl->pub->up) {
		brcms_err(wl->wlc->hw->d11core, "ops->tx called while down\n");
		kfree_skb(skb);
		goto done;
	}
	if (brcms_c_sendpkt_mac80211(wl->wlc, skb, hw))
		tx_info->rate_driver_data[0] = control->sta;
 done:
	spin_unlock_bh(&wl->lock);
}

static int brcms_ops_start(struct ieee80211_hw *hw)
{
	struct brcms_info *wl = hw->priv;
	bool blocked;
	int err;

	if (!wl->ucode.bcm43xx_bomminor) {
		err = brcms_request_fw(wl, wl->wlc->hw->d11core);
		if (err)
			return -ENOENT;
	}

	ieee80211_wake_queues(hw);
	spin_lock_bh(&wl->lock);
	blocked = brcms_rfkill_set_hw_state(wl);
	spin_unlock_bh(&wl->lock);
	if (!blocked)
		wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);

	spin_lock_bh(&wl->lock);
	/* avoid acknowledging frames before a non-monitor device is added */
	wl->mute_tx = true;

	if (!wl->pub->up)
		if (!blocked)
			err = brcms_up(wl);
		else
			err = -ERFKILL;
	else
		err = -ENODEV;
	spin_unlock_bh(&wl->lock);

	if (err != 0)
		brcms_err(wl->wlc->hw->d11core, "%s: brcms_up() returned %d\n",
			  __func__, err);

	bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, true);
	return err;
}

static void brcms_ops_stop(struct ieee80211_hw *hw)
{
	struct brcms_info *wl = hw->priv;
	int status;

	ieee80211_stop_queues(hw);

	if (wl->wlc == NULL)
		return;

	spin_lock_bh(&wl->lock);
	status = brcms_c_chipmatch(wl->wlc->hw->d11core);
	spin_unlock_bh(&wl->lock);
	if (!status) {
		brcms_err(wl->wlc->hw->d11core,
			  "wl: brcms_ops_stop: chipmatch failed\n");
		return;
	}

	bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, false);

	/* put driver in down state */
	spin_lock_bh(&wl->lock);
	brcms_down(wl);
	spin_unlock_bh(&wl->lock);
}

static int
brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
	struct brcms_info *wl = hw->priv;

	/* Just STA, AP and ADHOC for now */
	if (vif->type != NL80211_IFTYPE_STATION &&
	    vif->type != NL80211_IFTYPE_AP &&
	    vif->type != NL80211_IFTYPE_ADHOC) {
		brcms_err(wl->wlc->hw->d11core,
			  "%s: Attempt to add type %d, only STA, AP and AdHoc for now\n",
			  __func__, vif->type);
		return -EOPNOTSUPP;
	}

	spin_lock_bh(&wl->lock);
	wl->mute_tx = false;
	brcms_c_mute(wl->wlc, false);
	if (vif->type == NL80211_IFTYPE_STATION)
		brcms_c_start_station(wl->wlc, vif->addr);
	else if (vif->type == NL80211_IFTYPE_AP)
		brcms_c_start_ap(wl->wlc, vif->addr, vif->bss_conf.bssid,
				 vif->bss_conf.ssid, vif->bss_conf.ssid_len);
	else if (vif->type == NL80211_IFTYPE_ADHOC)
		brcms_c_start_adhoc(wl->wlc, vif->addr);
	spin_unlock_bh(&wl->lock);

	return 0;
}

static void
brcms_ops_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
}

static int brcms_ops_config(struct ieee80211_hw *hw, u32 changed)
{
	struct ieee80211_conf *conf = &hw->conf;
	struct brcms_info *wl = hw->priv;
	struct bcma_device *core = wl->wlc->hw->d11core;
	int err = 0;
	int new_int;

	spin_lock_bh(&wl->lock);
	if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
		brcms_c_set_beacon_listen_interval(wl->wlc,
						   conf->listen_interval);
	}
	if (changed & IEEE80211_CONF_CHANGE_MONITOR)
		brcms_dbg_info(core, "%s: change monitor mode: %s\n",
			       __func__, conf->flags & IEEE80211_CONF_MONITOR ?
			       "true" : "false");
	if (changed & IEEE80211_CONF_CHANGE_PS)
		brcms_err(core, "%s: change power-save mode: %s (implement)\n",
			  __func__, conf->flags & IEEE80211_CONF_PS ?
			  "true" : "false");

	if (changed & IEEE80211_CONF_CHANGE_POWER) {
		err = brcms_c_set_tx_power(wl->wlc, conf->power_level);
		if (err < 0) {
			brcms_err(core, "%s: Error setting power_level\n",
				  __func__);
			goto config_out;
		}
		new_int = brcms_c_get_tx_power(wl->wlc);
		if (new_int != conf->power_level)
			brcms_err(core,
				  "%s: Power level req != actual, %d %d\n",
				  __func__, conf->power_level,
				  new_int);
	}
	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
		if (conf->chandef.width == NL80211_CHAN_WIDTH_20 ||
		    conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
			err = brcms_c_set_channel(wl->wlc,
						  conf->chandef.chan->hw_value);
		else
			err = -ENOTSUPP;
	}
	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
		err = brcms_c_set_rate_limit(wl->wlc,
					     conf->short_frame_max_tx_count,
					     conf->long_frame_max_tx_count);

 config_out:
	spin_unlock_bh(&wl->lock);
	return err;
}

static void
brcms_ops_bss_info_changed(struct ieee80211_hw *hw,
			struct ieee80211_vif *vif,
			struct ieee80211_bss_conf *info, u32 changed)
{
	struct brcms_info *wl = hw->priv;
	struct bcma_device *core = wl->wlc->hw->d11core;

	if (changed & BSS_CHANGED_ASSOC) {
		/* association status changed (associated/disassociated)
		 * also implies a change in the AID.
		 */
		brcms_err(core, "%s: %s: %sassociated\n", KBUILD_MODNAME,
			  __func__, info->assoc ? "" : "dis");
		spin_lock_bh(&wl->lock);
		brcms_c_associate_upd(wl->wlc, info->assoc);
		spin_unlock_bh(&wl->lock);
	}
	if (changed & BSS_CHANGED_ERP_SLOT) {
		s8 val;

		/* slot timing changed */
		if (info->use_short_slot)
			val = 1;
		else
			val = 0;
		spin_lock_bh(&wl->lock);
		brcms_c_set_shortslot_override(wl->wlc, val);
		spin_unlock_bh(&wl->lock);
	}

	if (changed & BSS_CHANGED_HT) {
		/* 802.11n parameters changed */
		u16 mode = info->ht_operation_mode;

		spin_lock_bh(&wl->lock);
		brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_CFG,
			mode & IEEE80211_HT_OP_MODE_PROTECTION);
		brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_NONGF,
			mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
		brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_OBSS,
			mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
		spin_unlock_bh(&wl->lock);
	}
	if (changed & BSS_CHANGED_BASIC_RATES) {
		struct ieee80211_supported_band *bi;
		u32 br_mask, i;
		u16 rate;
		struct brcm_rateset rs;
		int error;

		/* retrieve the current rates */
		spin_lock_bh(&wl->lock);
		brcms_c_get_current_rateset(wl->wlc, &rs);
		spin_unlock_bh(&wl->lock);

		br_mask = info->basic_rates;
		bi = hw->wiphy->bands[brcms_c_get_curband(wl->wlc)];
		for (i = 0; i < bi->n_bitrates; i++) {
			/* convert to internal rate value */
			rate = (bi->bitrates[i].bitrate << 1) / 10;

			/* set/clear basic rate flag */
			brcms_set_basic_rate(&rs, rate, br_mask & 1);
			br_mask >>= 1;
		}

		/* update the rate set */
		spin_lock_bh(&wl->lock);
		error = brcms_c_set_rateset(wl->wlc, &rs);
		spin_unlock_bh(&wl->lock);
		if (error)
			brcms_err(core, "changing basic rates failed: %d\n",
				  error);
	}
	if (changed & BSS_CHANGED_BEACON_INT) {
		/* Beacon interval changed */
		spin_lock_bh(&wl->lock);
		brcms_c_set_beacon_period(wl->wlc, info->beacon_int);
		spin_unlock_bh(&wl->lock);
	}
	if (changed & BSS_CHANGED_BSSID) {
		/* BSSID changed, for whatever reason (IBSS and managed mode) */
		spin_lock_bh(&wl->lock);
		brcms_c_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid);
		spin_unlock_bh(&wl->lock);
	}
	if (changed & BSS_CHANGED_SSID) {
		/* BSSID changed, for whatever reason (IBSS and managed mode) */
		spin_lock_bh(&wl->lock);
		brcms_c_set_ssid(wl->wlc, info->ssid, info->ssid_len);
		spin_unlock_bh(&wl->lock);
	}
	if (changed & BSS_CHANGED_BEACON) {
		/* Beacon data changed, retrieve new beacon (beaconing modes) */
		struct sk_buff *beacon;
		u16 tim_offset = 0;

		spin_lock_bh(&wl->lock);
		beacon = ieee80211_beacon_get_tim(hw, vif, &tim_offset, NULL);
		brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
				       info->dtim_period);
		spin_unlock_bh(&wl->lock);
	}

	if (changed & BSS_CHANGED_AP_PROBE_RESP) {
		struct sk_buff *probe_resp;

		spin_lock_bh(&wl->lock);
		probe_resp = ieee80211_proberesp_get(hw, vif);
		brcms_c_set_new_probe_resp(wl->wlc, probe_resp);
		spin_unlock_bh(&wl->lock);
	}

	if (changed & BSS_CHANGED_BEACON_ENABLED) {
		/* Beaconing should be enabled/disabled (beaconing modes) */
		brcms_err(core, "%s: Beacon enabled: %s\n", __func__,
			  info->enable_beacon ? "true" : "false");
		if (info->enable_beacon &&
		    hw->wiphy->flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) {
			brcms_c_enable_probe_resp(wl->wlc, true);
		} else {
			brcms_c_enable_probe_resp(wl->wlc, false);
		}
	}

	if (changed & BSS_CHANGED_CQM) {
		/* Connection quality monitor config changed */
		brcms_err(core, "%s: cqm change: threshold %d, hys %d "
			  " (implement)\n", __func__, info->cqm_rssi_thold,
			  info->cqm_rssi_hyst);
	}

	if (changed & BSS_CHANGED_IBSS) {
		/* IBSS join status changed */
		brcms_err(core, "%s: IBSS joined: %s (implement)\n",
			  __func__, info->ibss_joined ? "true" : "false");
	}

	if (changed & BSS_CHANGED_ARP_FILTER) {
		/* Hardware ARP filter address list or state changed */
		brcms_err(core, "%s: arp filtering: %d addresses"
			  " (implement)\n", __func__, info->arp_addr_cnt);
	}

	if (changed & BSS_CHANGED_QOS) {
		/*
		 * QoS for this association was enabled/disabled.
		 * Note that it is only ever disabled for station mode.
		 */
		brcms_err(core, "%s: qos enabled: %s (implement)\n",
			  __func__, info->qos ? "true" : "false");
	}
	return;
}

static void
brcms_ops_configure_filter(struct ieee80211_hw *hw,
			unsigned int changed_flags,
			unsigned int *total_flags, u64 multicast)
{
	struct brcms_info *wl = hw->priv;
	struct bcma_device *core = wl->wlc->hw->d11core;

	changed_flags &= MAC_FILTERS;
	*total_flags &= MAC_FILTERS;

	if (changed_flags & FIF_ALLMULTI)
		brcms_dbg_info(core, "FIF_ALLMULTI\n");
	if (changed_flags & FIF_FCSFAIL)
		brcms_dbg_info(core, "FIF_FCSFAIL\n");
	if (changed_flags & FIF_CONTROL)
		brcms_dbg_info(core, "FIF_CONTROL\n");
	if (changed_flags & FIF_OTHER_BSS)
		brcms_dbg_info(core, "FIF_OTHER_BSS\n");
	if (changed_flags & FIF_PSPOLL)
		brcms_dbg_info(core, "FIF_PSPOLL\n");
	if (changed_flags & FIF_BCN_PRBRESP_PROMISC)
		brcms_dbg_info(core, "FIF_BCN_PRBRESP_PROMISC\n");

	spin_lock_bh(&wl->lock);
	brcms_c_mac_promisc(wl->wlc, *total_flags);
	spin_unlock_bh(&wl->lock);
	return;
}

static void brcms_ops_sw_scan_start(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    const u8 *mac_addr)
{
	struct brcms_info *wl = hw->priv;
	spin_lock_bh(&wl->lock);
	brcms_c_scan_start(wl->wlc);
	spin_unlock_bh(&wl->lock);
	return;
}

static void brcms_ops_sw_scan_complete(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
{
	struct brcms_info *wl = hw->priv;
	spin_lock_bh(&wl->lock);
	brcms_c_scan_stop(wl->wlc);
	spin_unlock_bh(&wl->lock);
	return;
}

static int
brcms_ops_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
		  const struct ieee80211_tx_queue_params *params)
{
	struct brcms_info *wl = hw->priv;

	spin_lock_bh(&wl->lock);
	brcms_c_wme_setparams(wl->wlc, queue, params, true);
	spin_unlock_bh(&wl->lock);

	return 0;
}

static int
brcms_ops_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
	       struct ieee80211_sta *sta)
{
	struct brcms_info *wl = hw->priv;
	struct scb *scb = &wl->wlc->pri_scb;

	brcms_c_init_scb(scb);

	wl->pub->global_ampdu = &(scb->scb_ampdu);
	wl->pub->global_ampdu->scb = scb;
	wl->pub->global_ampdu->max_pdu = 16;

	/*
	 * minstrel_ht initiates addBA on our behalf by calling
	 * ieee80211_start_tx_ba_session()
	 */
	return 0;
}

static int
brcms_ops_ampdu_action(struct ieee80211_hw *hw,
		    struct ieee80211_vif *vif,
		    struct ieee80211_ampdu_params *params)
{
	struct brcms_info *wl = hw->priv;
	struct scb *scb = &wl->wlc->pri_scb;
	int status;
	struct ieee80211_sta *sta = params->sta;
	enum ieee80211_ampdu_mlme_action action = params->action;
	u16 tid = params->tid;
	u8 buf_size = params->buf_size;

	if (WARN_ON(scb->magic != SCB_MAGIC))
		return -EIDRM;
	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		break;
	case IEEE80211_AMPDU_RX_STOP:
		break;
	case IEEE80211_AMPDU_TX_START:
		spin_lock_bh(&wl->lock);
		status = brcms_c_aggregatable(wl->wlc, tid);
		spin_unlock_bh(&wl->lock);
		if (!status) {
			brcms_err(wl->wlc->hw->d11core,
				  "START: tid %d is not agg\'able\n", tid);
			return -EINVAL;
		}
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;

	case IEEE80211_AMPDU_TX_STOP_CONT:
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
		spin_lock_bh(&wl->lock);
		brcms_c_ampdu_flush(wl->wlc, sta, tid);
		spin_unlock_bh(&wl->lock);
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		/*
		 * BA window size from ADDBA response ('buf_size') defines how
		 * many outstanding MPDUs are allowed for the BA stream by
		 * recipient and traffic class. 'ampdu_factor' gives maximum
		 * AMPDU size.
		 */
		spin_lock_bh(&wl->lock);
		brcms_c_ampdu_tx_operational(wl->wlc, tid, buf_size,
			(1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
			 sta->ht_cap.ampdu_factor)) - 1);
		spin_unlock_bh(&wl->lock);
		/* Power save wakeup */
		break;
	default:
		brcms_err(wl->wlc->hw->d11core,
			  "%s: Invalid command, ignoring\n", __func__);
	}

	return 0;
}

static void brcms_ops_rfkill_poll(struct ieee80211_hw *hw)
{
	struct brcms_info *wl = hw->priv;
	bool blocked;

	spin_lock_bh(&wl->lock);
	blocked = brcms_c_check_radio_disabled(wl->wlc);
	spin_unlock_bh(&wl->lock);

	wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
}

static bool brcms_tx_flush_completed(struct brcms_info *wl)
{
	bool result;

	spin_lock_bh(&wl->lock);
	result = brcms_c_tx_flush_completed(wl->wlc);
	spin_unlock_bh(&wl->lock);
	return result;
}

static void brcms_ops_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			    u32 queues, bool drop)
{
	struct brcms_info *wl = hw->priv;
	int ret;

	no_printk("%s: drop = %s\n", __func__, drop ? "true" : "false");

	ret = wait_event_timeout(wl->tx_flush_wq,
				 brcms_tx_flush_completed(wl),
				 msecs_to_jiffies(BRCMS_FLUSH_TIMEOUT));

	brcms_dbg_mac80211(wl->wlc->hw->d11core,
			   "ret=%d\n", jiffies_to_msecs(ret));
}

static u64 brcms_ops_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
	struct brcms_info *wl = hw->priv;
	u64 tsf;

	spin_lock_bh(&wl->lock);
	tsf = brcms_c_tsf_get(wl->wlc);
	spin_unlock_bh(&wl->lock);

	return tsf;
}

static void brcms_ops_set_tsf(struct ieee80211_hw *hw,
			   struct ieee80211_vif *vif, u64 tsf)
{
	struct brcms_info *wl = hw->priv;

	spin_lock_bh(&wl->lock);
	brcms_c_tsf_set(wl->wlc, tsf);
	spin_unlock_bh(&wl->lock);
}

static const struct ieee80211_ops brcms_ops = {
	.tx = brcms_ops_tx,
	.start = brcms_ops_start,
	.stop = brcms_ops_stop,
	.add_interface = brcms_ops_add_interface,
	.remove_interface = brcms_ops_remove_interface,
	.config = brcms_ops_config,
	.bss_info_changed = brcms_ops_bss_info_changed,
	.configure_filter = brcms_ops_configure_filter,
	.sw_scan_start = brcms_ops_sw_scan_start,
	.sw_scan_complete = brcms_ops_sw_scan_complete,
	.conf_tx = brcms_ops_conf_tx,
	.sta_add = brcms_ops_sta_add,
	.ampdu_action = brcms_ops_ampdu_action,
	.rfkill_poll = brcms_ops_rfkill_poll,
	.flush = brcms_ops_flush,
	.get_tsf = brcms_ops_get_tsf,
	.set_tsf = brcms_ops_set_tsf,
};

void brcms_dpc(unsigned long data)
{
	struct brcms_info *wl;

	wl = (struct brcms_info *) data;

	spin_lock_bh(&wl->lock);

	/* call the common second level interrupt handler */
	if (wl->pub->up) {
		if (wl->resched) {
			unsigned long flags;

			spin_lock_irqsave(&wl->isr_lock, flags);
			brcms_c_intrsupd(wl->wlc);
			spin_unlock_irqrestore(&wl->isr_lock, flags);
		}

		wl->resched = brcms_c_dpc(wl->wlc, true);
	}

	/* brcms_c_dpc() may bring the driver down */
	if (!wl->pub->up)
		goto done;

	/* re-schedule dpc */
	if (wl->resched)
		tasklet_schedule(&wl->tasklet);
	else
		/* re-enable interrupts */
		brcms_intrson(wl);

 done:
	spin_unlock_bh(&wl->lock);
	wake_up(&wl->tx_flush_wq);
}

static irqreturn_t brcms_isr(int irq, void *dev_id)
{
	struct brcms_info *wl;
	irqreturn_t ret = IRQ_NONE;

	wl = (struct brcms_info *) dev_id;

	spin_lock(&wl->isr_lock);

	/* call common first level interrupt handler */
	if (brcms_c_isr(wl->wlc)) {
		/* schedule second level handler */
		tasklet_schedule(&wl->tasklet);
		ret = IRQ_HANDLED;
	}

	spin_unlock(&wl->isr_lock);

	return ret;
}

/*
 * is called in brcms_pci_probe() context, therefore no locking required.
 */
static int ieee_hw_rate_init(struct ieee80211_hw *hw)
{
	struct brcms_info *wl = hw->priv;
	struct brcms_c_info *wlc = wl->wlc;
	struct ieee80211_supported_band *band;
	int has_5g = 0;
	u16 phy_type;

	hw->wiphy->bands[NL80211_BAND_2GHZ] = NULL;
	hw->wiphy->bands[NL80211_BAND_5GHZ] = NULL;

	phy_type = brcms_c_get_phy_type(wl->wlc, 0);
	if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
		band = &wlc->bandstate[BAND_2G_INDEX]->band;
		*band = brcms_band_2GHz_nphy_template;
		if (phy_type == PHY_TYPE_LCN) {
			/* Single stream */
			band->ht_cap.mcs.rx_mask[1] = 0;
			band->ht_cap.mcs.rx_highest = cpu_to_le16(72);
		}
		hw->wiphy->bands[NL80211_BAND_2GHZ] = band;
	} else {
		return -EPERM;
	}

	/* Assume all bands use the same phy.  True for 11n devices. */
	if (wl->pub->_nbands > 1) {
		has_5g++;
		if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
			band = &wlc->bandstate[BAND_5G_INDEX]->band;
			*band = brcms_band_5GHz_nphy_template;
			hw->wiphy->bands[NL80211_BAND_5GHZ] = band;
		} else {
			return -EPERM;
		}
	}
	return 0;
}

/*
 * is called in brcms_pci_probe() context, therefore no locking required.
 */
static int ieee_hw_init(struct ieee80211_hw *hw)
{
	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
	ieee80211_hw_set(hw, SIGNAL_DBM);
	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);

	hw->extra_tx_headroom = brcms_c_get_header_len();
	hw->queues = N_TX_QUEUES;
	hw->max_rates = 2;	/* Primary rate and 1 fallback rate */

	/* channel change time is dependent on chip and band  */
	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
				     BIT(NL80211_IFTYPE_AP) |
				     BIT(NL80211_IFTYPE_ADHOC);

	/*
	 * deactivate sending probe responses by ucude, because this will
	 * cause problems when WPS is used.
	 *
	 * hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
	 */

	hw->rate_control_algorithm = "minstrel_ht";

	hw->sta_data_size = 0;
	return ieee_hw_rate_init(hw);
}

/**
 * attach to the WL device.
 *
 * Attach to the WL device identified by vendor and device parameters.
 * regs is a host accessible memory address pointing to WL device registers.
 *
 * is called in brcms_bcma_probe() context, therefore no locking required.
 */
static struct brcms_info *brcms_attach(struct bcma_device *pdev)
{
	struct brcms_info *wl = NULL;
	int unit, err;
	struct ieee80211_hw *hw;
	u8 perm[ETH_ALEN];

	unit = n_adapters_found;
	err = 0;

	if (unit < 0)
		return NULL;

	/* allocate private info */
	hw = bcma_get_drvdata(pdev);
	if (hw != NULL)
		wl = hw->priv;
	if (WARN_ON(hw == NULL) || WARN_ON(wl == NULL))
		return NULL;
	wl->wiphy = hw->wiphy;

	atomic_set(&wl->callbacks, 0);

	init_waitqueue_head(&wl->tx_flush_wq);

	/* setup the bottom half handler */
	tasklet_init(&wl->tasklet, brcms_dpc, (unsigned long) wl);

	spin_lock_init(&wl->lock);
	spin_lock_init(&wl->isr_lock);

	/* common load-time initialization */
	wl->wlc = brcms_c_attach((void *)wl, pdev, unit, false, &err);
	if (!wl->wlc) {
		wiphy_err(wl->wiphy, "%s: attach() failed with code %d\n",
			  KBUILD_MODNAME, err);
		goto fail;
	}
	wl->pub = brcms_c_pub(wl->wlc);

	wl->pub->ieee_hw = hw;

	/* register our interrupt handler */
	if (request_irq(pdev->irq, brcms_isr,
			IRQF_SHARED, KBUILD_MODNAME, wl)) {
		wiphy_err(wl->wiphy, "wl%d: request_irq() failed\n", unit);
		goto fail;
	}
	wl->irq = pdev->irq;

	/* register module */
	brcms_c_module_register(wl->pub, "linux", wl, NULL);

	if (ieee_hw_init(hw)) {
		wiphy_err(wl->wiphy, "wl%d: %s: ieee_hw_init failed!\n", unit,
			  __func__);
		goto fail;
	}

	brcms_c_regd_init(wl->wlc);

	memcpy(perm, &wl->pub->cur_etheraddr, ETH_ALEN);
	if (WARN_ON(!is_valid_ether_addr(perm)))
		goto fail;
	SET_IEEE80211_PERM_ADDR(hw, perm);

	err = ieee80211_register_hw(hw);
	if (err)
		wiphy_err(wl->wiphy, "%s: ieee80211_register_hw failed, status"
			  "%d\n", __func__, err);

	if (wl->pub->srom_ccode[0] &&
	    regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
		wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);

	brcms_debugfs_attach(wl->pub);
	brcms_debugfs_create_files(wl->pub);
	n_adapters_found++;
	return wl;

fail:
	brcms_free(wl);
	return NULL;
}



/**
 * determines if a device is a WL device, and if so, attaches it.
 *
 * This function determines if a device pointed to by pdev is a WL device,
 * and if so, performs a brcms_attach() on it.
 *
 * Perimeter lock is initialized in the course of this function.
 */
static int brcms_bcma_probe(struct bcma_device *pdev)
{
	struct brcms_info *wl;
	struct ieee80211_hw *hw;

	dev_info(&pdev->dev, "mfg %x core %x rev %d class %d irq %d\n",
		 pdev->id.manuf, pdev->id.id, pdev->id.rev, pdev->id.class,
		 pdev->irq);

	if ((pdev->id.manuf != BCMA_MANUF_BCM) ||
	    (pdev->id.id != BCMA_CORE_80211))
		return -ENODEV;

	hw = ieee80211_alloc_hw(sizeof(struct brcms_info), &brcms_ops);
	if (!hw) {
		pr_err("%s: ieee80211_alloc_hw failed\n", __func__);
		return -ENOMEM;
	}

	SET_IEEE80211_DEV(hw, &pdev->dev);

	bcma_set_drvdata(pdev, hw);

	memset(hw->priv, 0, sizeof(*wl));

	wl = brcms_attach(pdev);
	if (!wl) {
		pr_err("%s: brcms_attach failed!\n", __func__);
		return -ENODEV;
	}
	brcms_led_register(wl);

	return 0;
}

static int brcms_suspend(struct bcma_device *pdev)
{
	struct brcms_info *wl;
	struct ieee80211_hw *hw;

	hw = bcma_get_drvdata(pdev);
	wl = hw->priv;
	if (!wl) {
		pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
		       __func__);
		return -ENODEV;
	}

	/* only need to flag hw is down for proper resume */
	spin_lock_bh(&wl->lock);
	wl->pub->hw_up = false;
	spin_unlock_bh(&wl->lock);

	brcms_dbg_info(wl->wlc->hw->d11core, "brcms_suspend ok\n");

	return 0;
}

static int brcms_resume(struct bcma_device *pdev)
{
	return 0;
}

static struct bcma_driver brcms_bcma_driver = {
	.name     = KBUILD_MODNAME,
	.probe    = brcms_bcma_probe,
	.suspend  = brcms_suspend,
	.resume   = brcms_resume,
	.remove   = brcms_remove,
	.id_table = brcms_coreid_table,
};

/**
 * This is the main entry point for the brcmsmac driver.
 *
 * This function is scheduled upon module initialization and
 * does the driver registration, which result in brcms_bcma_probe()
 * call resulting in the driver bringup.
 */
static void brcms_driver_init(struct work_struct *work)
{
	int error;

	error = bcma_driver_register(&brcms_bcma_driver);
	if (error)
		pr_err("%s: register returned %d\n", __func__, error);
}

static DECLARE_WORK(brcms_driver_work, brcms_driver_init);

static int __init brcms_module_init(void)
{
	brcms_debugfs_init();
	if (!schedule_work(&brcms_driver_work))
		return -EBUSY;

	return 0;
}

/**
 * This function unloads the brcmsmac driver from the system.
 *
 * This function unconditionally unloads the brcmsmac driver module from the
 * system.
 *
 */
static void __exit brcms_module_exit(void)
{
	cancel_work_sync(&brcms_driver_work);
	bcma_driver_unregister(&brcms_bcma_driver);
	brcms_debugfs_exit();
}

module_init(brcms_module_init);
module_exit(brcms_module_exit);

/*
 * precondition: perimeter lock has been acquired
 */
void brcms_txflowcontrol(struct brcms_info *wl, struct brcms_if *wlif,
			 bool state, int prio)
{
	brcms_err(wl->wlc->hw->d11core, "Shouldn't be here %s\n", __func__);
}

/*
 * precondition: perimeter lock has been acquired
 */
void brcms_init(struct brcms_info *wl)
{
	brcms_dbg_info(wl->wlc->hw->d11core, "Initializing wl%d\n",
		       wl->pub->unit);
	brcms_reset(wl);
	brcms_c_init(wl->wlc, wl->mute_tx);
}

/*
 * precondition: perimeter lock has been acquired
 */
uint brcms_reset(struct brcms_info *wl)
{
	brcms_dbg_info(wl->wlc->hw->d11core, "Resetting wl%d\n", wl->pub->unit);
	brcms_c_reset(wl->wlc);

	/* dpc will not be rescheduled */
	wl->resched = false;

	/* inform publicly that interface is down */
	wl->pub->up = false;

	return 0;
}

void brcms_fatal_error(struct brcms_info *wl)
{
	brcms_err(wl->wlc->hw->d11core, "wl%d: fatal error, reinitializing\n",
		  wl->wlc->pub->unit);
	brcms_reset(wl);
	ieee80211_restart_hw(wl->pub->ieee_hw);
}

/*
 * These are interrupt on/off entry points. Disable interrupts
 * during interrupt state transition.
 */
void brcms_intrson(struct brcms_info *wl)
{
	unsigned long flags;

	spin_lock_irqsave(&wl->isr_lock, flags);
	brcms_c_intrson(wl->wlc);
	spin_unlock_irqrestore(&wl->isr_lock, flags);
}

u32 brcms_intrsoff(struct brcms_info *wl)
{
	unsigned long flags;
	u32 status;

	spin_lock_irqsave(&wl->isr_lock, flags);
	status = brcms_c_intrsoff(wl->wlc);
	spin_unlock_irqrestore(&wl->isr_lock, flags);
	return status;
}

void brcms_intrsrestore(struct brcms_info *wl, u32 macintmask)
{
	unsigned long flags;

	spin_lock_irqsave(&wl->isr_lock, flags);
	brcms_c_intrsrestore(wl->wlc, macintmask);
	spin_unlock_irqrestore(&wl->isr_lock, flags);
}

/*
 * precondition: perimeter lock has been acquired
 */
int brcms_up(struct brcms_info *wl)
{
	int error = 0;

	if (wl->pub->up)
		return 0;

	error = brcms_c_up(wl->wlc);

	return error;
}

/*
 * precondition: perimeter lock has been acquired
 */
void brcms_down(struct brcms_info *wl)
{
	uint callbacks, ret_val = 0;

	/* call common down function */
	ret_val = brcms_c_down(wl->wlc);
	callbacks = atomic_read(&wl->callbacks) - ret_val;

	/* wait for down callbacks to complete */
	spin_unlock_bh(&wl->lock);

	/* For HIGH_only driver, it's important to actually schedule other work,
	 * not just spin wait since everything runs at schedule level
	 */
	SPINWAIT((atomic_read(&wl->callbacks) > callbacks), 100 * 1000);

	spin_lock_bh(&wl->lock);
}

/*
* precondition: perimeter lock is not acquired
 */
static void _brcms_timer(struct work_struct *work)
{
	struct brcms_timer *t = container_of(work, struct brcms_timer,
					     dly_wrk.work);

	spin_lock_bh(&t->wl->lock);

	if (t->set) {
		if (t->periodic) {
			atomic_inc(&t->wl->callbacks);
			ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
						     &t->dly_wrk,
						     msecs_to_jiffies(t->ms));
		} else {
			t->set = false;
		}

		t->fn(t->arg);
	}

	atomic_dec(&t->wl->callbacks);

	spin_unlock_bh(&t->wl->lock);
}

/*
 * Adds a timer to the list. Caller supplies a timer function.
 * Is called from wlc.
 *
 * precondition: perimeter lock has been acquired
 */
struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
				     void (*fn) (void *arg),
				     void *arg, const char *name)
{
	struct brcms_timer *t;

	t = kzalloc(sizeof(struct brcms_timer), GFP_ATOMIC);
	if (!t)
		return NULL;

	INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
	t->wl = wl;
	t->fn = fn;
	t->arg = arg;
	t->next = wl->timers;
	wl->timers = t;

#ifdef DEBUG
	t->name = kstrdup(name, GFP_ATOMIC);
#endif

	return t;
}

/*
 * adds only the kernel timer since it's going to be more accurate
 * as well as it's easier to make it periodic
 *
 * precondition: perimeter lock has been acquired
 */
void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
{
	struct ieee80211_hw *hw = t->wl->pub->ieee_hw;

#ifdef DEBUG
	if (t->set)
		brcms_dbg_info(t->wl->wlc->hw->d11core,
			       "%s: Already set. Name: %s, per %d\n",
			       __func__, t->name, periodic);
#endif
	t->ms = ms;
	t->periodic = (bool) periodic;
	if (!t->set) {
		t->set = true;
		atomic_inc(&t->wl->callbacks);
	}

	ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
}

/*
 * return true if timer successfully deleted, false if still pending
 *
 * precondition: perimeter lock has been acquired
 */
bool brcms_del_timer(struct brcms_timer *t)
{
	if (t->set) {
		t->set = false;
		if (!cancel_delayed_work(&t->dly_wrk))
			return false;

		atomic_dec(&t->wl->callbacks);
	}

	return true;
}

/*
 * precondition: perimeter lock has been acquired
 */
void brcms_free_timer(struct brcms_timer *t)
{
	struct brcms_info *wl = t->wl;
	struct brcms_timer *tmp;

	/* delete the timer in case it is active */
	brcms_del_timer(t);

	if (wl->timers == t) {
		wl->timers = wl->timers->next;
#ifdef DEBUG
		kfree(t->name);
#endif
		kfree(t);
		return;

	}

	tmp = wl->timers;
	while (tmp) {
		if (tmp->next == t) {
			tmp->next = t->next;
#ifdef DEBUG
			kfree(t->name);
#endif
			kfree(t);
			return;
		}
		tmp = tmp->next;
	}

}

/*
 * precondition: perimeter lock has been acquired
 */
int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
{
	int i, entry;
	const u8 *pdata;
	struct firmware_hdr *hdr;
	for (i = 0; i < wl->fw.fw_cnt; i++) {
		hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
		for (entry = 0; entry < wl->fw.hdr_num_entries[i];
		     entry++, hdr++) {
			u32 len = le32_to_cpu(hdr->len);
			if (le32_to_cpu(hdr->idx) == idx) {
				pdata = wl->fw.fw_bin[i]->data +
					le32_to_cpu(hdr->offset);
				*pbuf = kmemdup(pdata, len, GFP_ATOMIC);
				if (*pbuf == NULL)
					goto fail;

				return 0;
			}
		}
	}
	brcms_err(wl->wlc->hw->d11core,
		  "ERROR: ucode buf tag:%d can not be found!\n", idx);
	*pbuf = NULL;
fail:
	return -ENODATA;
}

/*
 * Precondition: Since this function is called in brcms_bcma_probe() context,
 * no locking is required.
 */
int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
{
	int i, entry;
	const u8 *pdata;
	struct firmware_hdr *hdr;
	for (i = 0; i < wl->fw.fw_cnt; i++) {
		hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
		for (entry = 0; entry < wl->fw.hdr_num_entries[i];
		     entry++, hdr++) {
			if (le32_to_cpu(hdr->idx) == idx) {
				pdata = wl->fw.fw_bin[i]->data +
					le32_to_cpu(hdr->offset);
				if (le32_to_cpu(hdr->len) != 4) {
					brcms_err(wl->wlc->hw->d11core,
						  "ERROR: fw hdr len\n");
					return -ENOMSG;
				}
				*n_bytes = le32_to_cpu(*((__le32 *) pdata));
				return 0;
			}
		}
	}
	brcms_err(wl->wlc->hw->d11core,
		  "ERROR: ucode tag:%d can not be found!\n", idx);
	return -ENOMSG;
}

/*
 * precondition: can both be called locked and unlocked
 */
void brcms_ucode_free_buf(void *p)
{
	kfree(p);
}

/*
 * checks validity of all firmware images loaded from user space
 *
 * Precondition: Since this function is called in brcms_bcma_probe() context,
 * no locking is required.
 */
int brcms_check_firmwares(struct brcms_info *wl)
{
	int i;
	int entry;
	int rc = 0;
	const struct firmware *fw;
	const struct firmware *fw_hdr;
	struct firmware_hdr *ucode_hdr;
	for (i = 0; i < MAX_FW_IMAGES && rc == 0; i++) {
		fw =  wl->fw.fw_bin[i];
		fw_hdr = wl->fw.fw_hdr[i];
		if (fw == NULL && fw_hdr == NULL) {
			break;
		} else if (fw == NULL || fw_hdr == NULL) {
			wiphy_err(wl->wiphy, "%s: invalid bin/hdr fw\n",
				  __func__);
			rc = -EBADF;
		} else if (fw_hdr->size % sizeof(struct firmware_hdr)) {
			wiphy_err(wl->wiphy, "%s: non integral fw hdr file "
				"size %zu/%zu\n", __func__, fw_hdr->size,
				sizeof(struct firmware_hdr));
			rc = -EBADF;
		} else if (fw->size < MIN_FW_SIZE || fw->size > MAX_FW_SIZE) {
			wiphy_err(wl->wiphy, "%s: out of bounds fw file size %zu\n",
				  __func__, fw->size);
			rc = -EBADF;
		} else {
			/* check if ucode section overruns firmware image */
			ucode_hdr = (struct firmware_hdr *)fw_hdr->data;
			for (entry = 0; entry < wl->fw.hdr_num_entries[i] &&
			     !rc; entry++, ucode_hdr++) {
				if (le32_to_cpu(ucode_hdr->offset) +
				    le32_to_cpu(ucode_hdr->len) >
				    fw->size) {
					wiphy_err(wl->wiphy,
						  "%s: conflicting bin/hdr\n",
						  __func__);
					rc = -EBADF;
				}
			}
		}
	}
	if (rc == 0 && wl->fw.fw_cnt != i) {
		wiphy_err(wl->wiphy, "%s: invalid fw_cnt=%d\n", __func__,
			wl->fw.fw_cnt);
		rc = -EBADF;
	}
	return rc;
}

/*
 * precondition: perimeter lock has been acquired
 */
bool brcms_rfkill_set_hw_state(struct brcms_info *wl)
{
	bool blocked = brcms_c_check_radio_disabled(wl->wlc);

	spin_unlock_bh(&wl->lock);
	wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
	if (blocked)
		wiphy_rfkill_start_polling(wl->pub->ieee_hw->wiphy);
	spin_lock_bh(&wl->lock);
	return blocked;
}