summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/libertas/cmd.c
blob: 6d59b4cf8fce1e381457885f3f1f250d20f996da (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
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
/*
 * This file contains the handling of command.
 * It prepares command and sends it to firmware when it is ready.
 */

#include <linux/kfifo.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/if_arp.h>

#include "decl.h"
#include "cfg.h"
#include "cmd.h"

#define CAL_NF(nf)		((s32)(-(s32)(nf)))
#define CAL_RSSI(snr, nf)	((s32)((s32)(snr) + CAL_NF(nf)))

/**
 * lbs_cmd_copyback - Simple callback that copies response back into command
 *
 * @priv:	A pointer to &struct lbs_private structure
 * @extra:	A pointer to the original command structure for which
 *		'resp' is a response
 * @resp:	A pointer to the command response
 *
 * returns:	0 on success, error on failure
 */
int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
		     struct cmd_header *resp)
{
	struct cmd_header *buf = (void *)extra;
	uint16_t copy_len;

	copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
	memcpy(buf, resp, copy_len);
	return 0;
}
EXPORT_SYMBOL_GPL(lbs_cmd_copyback);

/**
 *  lbs_cmd_async_callback - Simple callback that ignores the result.
 *  Use this if you just want to send a command to the hardware, but don't
 *  care for the result.
 *
 *  @priv:	ignored
 *  @extra:	ignored
 *  @resp:	ignored
 *
 *  returns:	0 for success
 */
static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
		     struct cmd_header *resp)
{
	return 0;
}


/**
 *  is_command_allowed_in_ps - tests if a command is allowed in Power Save mode
 *
 *  @cmd:	the command ID
 *
 *  returns:	1 if allowed, 0 if not allowed
 */
static u8 is_command_allowed_in_ps(u16 cmd)
{
	switch (cmd) {
	case CMD_802_11_RSSI:
		return 1;
	case CMD_802_11_HOST_SLEEP_CFG:
		return 1;
	default:
		break;
	}
	return 0;
}

/**
 *  lbs_update_hw_spec - Updates the hardware details like MAC address
 *  and regulatory region
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	0 on success, error on failure
 */
int lbs_update_hw_spec(struct lbs_private *priv)
{
	struct cmd_ds_get_hw_spec cmd;
	int ret = -1;
	u32 i;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
	ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
	if (ret)
		goto out;

	priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);

	/* The firmware release is in an interesting format: the patch
	 * level is in the most significant nibble ... so fix that: */
	priv->fwrelease = le32_to_cpu(cmd.fwrelease);
	priv->fwrelease = (priv->fwrelease << 8) |
		(priv->fwrelease >> 24 & 0xff);

	/* Some firmware capabilities:
	 * CF card    firmware 5.0.16p0:   cap 0x00000303
	 * USB dongle firmware 5.110.17p2: cap 0x00000303
	 */
	netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
		cmd.permanentaddr,
		priv->fwrelease >> 24 & 0xff,
		priv->fwrelease >> 16 & 0xff,
		priv->fwrelease >>  8 & 0xff,
		priv->fwrelease       & 0xff,
		priv->fwcapinfo);
	lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
		    cmd.hwifversion, cmd.version);

	/* Clamp region code to 8-bit since FW spec indicates that it should
	 * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
	 * returns non-zero high 8 bits here.
	 *
	 * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
	 * need to check for this problem and handle it properly.
	 */
	if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
		priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
	else
		priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;

	for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
		/* use the region code to search for the index */
		if (priv->regioncode == lbs_region_code_to_index[i])
			break;
	}

	/* if it's unidentified region code, use the default (USA) */
	if (i >= MRVDRV_MAX_REGION_CODE) {
		priv->regioncode = 0x10;
		netdev_info(priv->dev,
			    "unidentified region code; using the default (USA)\n");
	}

	if (priv->current_addr[0] == 0xff)
		memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);

	if (!priv->copied_hwaddr) {
		memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
		if (priv->mesh_dev)
			memcpy(priv->mesh_dev->dev_addr,
				priv->current_addr, ETH_ALEN);
		priv->copied_hwaddr = 1;
	}

out:
	lbs_deb_leave(LBS_DEB_CMD);
	return ret;
}

static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
			struct cmd_header *resp)
{
	lbs_deb_enter(LBS_DEB_CMD);
	if (priv->is_host_sleep_activated) {
		priv->is_host_sleep_configured = 0;
		if (priv->psstate == PS_STATE_FULL_POWER) {
			priv->is_host_sleep_activated = 0;
			wake_up_interruptible(&priv->host_sleep_q);
		}
	} else {
		priv->is_host_sleep_configured = 1;
	}
	lbs_deb_leave(LBS_DEB_CMD);
	return 0;
}

int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
		struct wol_config *p_wol_config)
{
	struct cmd_ds_host_sleep cmd_config;
	int ret;

	/*
	 * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
	 * and the card will return a failure.  Since we need to be
	 * able to reset the mask, in those cases we set a 0 mask instead.
	 */
	if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
		criteria = 0;

	cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
	cmd_config.criteria = cpu_to_le32(criteria);
	cmd_config.gpio = priv->wol_gpio;
	cmd_config.gap = priv->wol_gap;

	if (p_wol_config != NULL)
		memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
				sizeof(struct wol_config));
	else
		cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;

	ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
			le16_to_cpu(cmd_config.hdr.size),
			lbs_ret_host_sleep_cfg, 0);
	if (!ret) {
		if (p_wol_config)
			memcpy((uint8_t *) p_wol_config,
					(uint8_t *)&cmd_config.wol_conf,
					sizeof(struct wol_config));
	} else {
		netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);

/**
 *  lbs_set_ps_mode - Sets the Power Save mode
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 *                         PS_MODE_ACTION_EXIT_PS)
 *  @block:	Whether to block on a response or not
 *
 *  returns:	0 on success, error on failure
 */
int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
{
	struct cmd_ds_802_11_ps_mode cmd;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(cmd_action);

	if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
		lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
		cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
	} else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
		lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
	} else {
		/* We don't handle CONFIRM_SLEEP here because it needs to
		 * be fastpathed to the firmware.
		 */
		lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
		ret = -EOPNOTSUPP;
		goto out;
	}

	if (block)
		ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
	else
		lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
				struct sleep_params *sp)
{
	struct cmd_ds_802_11_sleep_params cmd;
	int ret;

	lbs_deb_enter(LBS_DEB_CMD);

	if (cmd_action == CMD_ACT_GET) {
		memset(&cmd, 0, sizeof(cmd));
	} else {
		cmd.error = cpu_to_le16(sp->sp_error);
		cmd.offset = cpu_to_le16(sp->sp_offset);
		cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
		cmd.calcontrol = sp->sp_calcontrol;
		cmd.externalsleepclk = sp->sp_extsleepclk;
		cmd.reserved = cpu_to_le16(sp->sp_reserved);
	}
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(cmd_action);

	ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);

	if (!ret) {
		lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
			    "calcontrol 0x%x extsleepclk 0x%x\n",
			    le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
			    le16_to_cpu(cmd.stabletime), cmd.calcontrol,
			    cmd.externalsleepclk);

		sp->sp_error = le16_to_cpu(cmd.error);
		sp->sp_offset = le16_to_cpu(cmd.offset);
		sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
		sp->sp_calcontrol = cmd.calcontrol;
		sp->sp_extsleepclk = cmd.externalsleepclk;
		sp->sp_reserved = le16_to_cpu(cmd.reserved);
	}

	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return 0;
}

static int lbs_wait_for_ds_awake(struct lbs_private *priv)
{
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	if (priv->is_deep_sleep) {
		if (!wait_event_interruptible_timeout(priv->ds_awake_q,
					!priv->is_deep_sleep, (10 * HZ))) {
			netdev_err(priv->dev, "ds_awake_q: timer expired\n");
			ret = -1;
		}
	}

	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
{
	int ret =  0;

	lbs_deb_enter(LBS_DEB_CMD);

	if (deep_sleep) {
		if (priv->is_deep_sleep != 1) {
			lbs_deb_cmd("deep sleep: sleep\n");
			BUG_ON(!priv->enter_deep_sleep);
			ret = priv->enter_deep_sleep(priv);
			if (!ret) {
				netif_stop_queue(priv->dev);
				netif_carrier_off(priv->dev);
			}
		} else {
			netdev_err(priv->dev, "deep sleep: already enabled\n");
		}
	} else {
		if (priv->is_deep_sleep) {
			lbs_deb_cmd("deep sleep: wakeup\n");
			BUG_ON(!priv->exit_deep_sleep);
			ret = priv->exit_deep_sleep(priv);
			if (!ret) {
				ret = lbs_wait_for_ds_awake(priv);
				if (ret)
					netdev_err(priv->dev,
						   "deep sleep: wakeup failed\n");
			}
		}
	}

	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
		unsigned long dummy,
		struct cmd_header *cmd)
{
	lbs_deb_enter(LBS_DEB_FW);
	priv->is_host_sleep_activated = 1;
	wake_up_interruptible(&priv->host_sleep_q);
	lbs_deb_leave(LBS_DEB_FW);
	return 0;
}

int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
{
	struct cmd_header cmd;
	int ret = 0;
	uint32_t criteria = EHS_REMOVE_WAKEUP;

	lbs_deb_enter(LBS_DEB_CMD);

	if (host_sleep) {
		if (priv->is_host_sleep_activated != 1) {
			memset(&cmd, 0, sizeof(cmd));
			ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
					(struct wol_config *)NULL);
			if (ret) {
				netdev_info(priv->dev,
					    "Host sleep configuration failed: %d\n",
					    ret);
				return ret;
			}
			if (priv->psstate == PS_STATE_FULL_POWER) {
				ret = __lbs_cmd(priv,
						CMD_802_11_HOST_SLEEP_ACTIVATE,
						&cmd,
						sizeof(cmd),
						lbs_ret_host_sleep_activate, 0);
				if (ret)
					netdev_info(priv->dev,
						    "HOST_SLEEP_ACTIVATE failed: %d\n",
						    ret);
			}

			if (!wait_event_interruptible_timeout(
						priv->host_sleep_q,
						priv->is_host_sleep_activated,
						(10 * HZ))) {
				netdev_err(priv->dev,
					   "host_sleep_q: timer expired\n");
				ret = -1;
			}
		} else {
			netdev_err(priv->dev, "host sleep: already enabled\n");
		}
	} else {
		if (priv->is_host_sleep_activated)
			ret = lbs_host_sleep_cfg(priv, criteria,
					(struct wol_config *)NULL);
	}

	return ret;
}

/**
 *  lbs_set_snmp_mib - Set an SNMP MIB value
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @oid:	The OID to set in the firmware
 *  @val:	Value to set the OID to
 *
 *  returns: 	   	0 on success, error on failure
 */
int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
{
	struct cmd_ds_802_11_snmp_mib cmd;
	int ret;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof (cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	cmd.oid = cpu_to_le16((u16) oid);

	switch (oid) {
	case SNMP_MIB_OID_BSS_TYPE:
		cmd.bufsize = cpu_to_le16(sizeof(u8));
		cmd.value[0] = val;
		break;
	case SNMP_MIB_OID_11D_ENABLE:
	case SNMP_MIB_OID_FRAG_THRESHOLD:
	case SNMP_MIB_OID_RTS_THRESHOLD:
	case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
	case SNMP_MIB_OID_LONG_RETRY_LIMIT:
		cmd.bufsize = cpu_to_le16(sizeof(u16));
		*((__le16 *)(&cmd.value)) = cpu_to_le16(val);
		break;
	default:
		lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
		ret = -EINVAL;
		goto out;
	}

	lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
		    le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);

	ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

/**
 *  lbs_get_snmp_mib - Get an SNMP MIB value
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @oid:	The OID to retrieve from the firmware
 *  @out_val:	Location for the returned value
 *
 *  returns:	0 on success, error on failure
 */
int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
{
	struct cmd_ds_802_11_snmp_mib cmd;
	int ret;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof (cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_GET);
	cmd.oid = cpu_to_le16(oid);

	ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
	if (ret)
		goto out;

	switch (le16_to_cpu(cmd.bufsize)) {
	case sizeof(u8):
		*out_val = cmd.value[0];
		break;
	case sizeof(u16):
		*out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
		break;
	default:
		lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
		            oid, le16_to_cpu(cmd.bufsize));
		break;
	}

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

/**
 *  lbs_get_tx_power - Get the min, max, and current TX power
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @curlevel:	Current power level in dBm
 *  @minlevel:	Minimum supported power level in dBm (optional)
 *  @maxlevel:	Maximum supported power level in dBm (optional)
 *
 *  returns:	0 on success, error on failure
 */
int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
		     s16 *maxlevel)
{
	struct cmd_ds_802_11_rf_tx_power cmd;
	int ret;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_GET);

	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
	if (ret == 0) {
		*curlevel = le16_to_cpu(cmd.curlevel);
		if (minlevel)
			*minlevel = cmd.minlevel;
		if (maxlevel)
			*maxlevel = cmd.maxlevel;
	}

	lbs_deb_leave(LBS_DEB_CMD);
	return ret;
}

/**
 *  lbs_set_tx_power - Set the TX power
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @dbm:	The desired power level in dBm
 *
 *  returns: 	   	0 on success, error on failure
 */
int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
{
	struct cmd_ds_802_11_rf_tx_power cmd;
	int ret;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	cmd.curlevel = cpu_to_le16(dbm);

	lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);

	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);

	lbs_deb_leave(LBS_DEB_CMD);
	return ret;
}

/**
 *  lbs_set_monitor_mode - Enable or disable monitor mode
 *  (only implemented on OLPC usb8388 FW)
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @enable:	1 to enable monitor mode, 0 to disable
 *
 *  returns:	0 on success, error on failure
 */
int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
{
	struct cmd_ds_802_11_monitor_mode cmd;
	int ret;

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	if (enable)
		cmd.mode = cpu_to_le16(0x1);

	lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);

	ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
	if (ret == 0) {
		priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
						ARPHRD_ETHER;
	}

	lbs_deb_leave(LBS_DEB_CMD);
	return ret;
}

/**
 *  lbs_get_channel - Get the radio channel
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	The channel on success, error on failure
 */
static int lbs_get_channel(struct lbs_private *priv)
{
	struct cmd_ds_802_11_rf_channel cmd;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);

	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
	if (ret)
		goto out;

	ret = le16_to_cpu(cmd.channel);
	lbs_deb_cmd("current radio channel is %d\n", ret);

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

int lbs_update_channel(struct lbs_private *priv)
{
	int ret;

	/* the channel in f/w could be out of sync; get the current channel */
	lbs_deb_enter(LBS_DEB_ASSOC);

	ret = lbs_get_channel(priv);
	if (ret > 0) {
		priv->channel = ret;
		ret = 0;
	}
	lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
	return ret;
}

/**
 *  lbs_set_channel - Set the radio channel
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *  @channel:	The desired channel, or 0 to clear a locked channel
 *
 *  returns:	0 on success, error on failure
 */
int lbs_set_channel(struct lbs_private *priv, u8 channel)
{
	struct cmd_ds_802_11_rf_channel cmd;
#ifdef DEBUG
	u8 old_channel = priv->channel;
#endif
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
	cmd.channel = cpu_to_le16(channel);

	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
	if (ret)
		goto out;

	priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
	lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
		priv->channel);

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

/**
 * lbs_get_rssi - Get current RSSI and noise floor
 *
 * @priv:	A pointer to &struct lbs_private structure
 * @rssi:	On successful return, signal level in mBm
 * @nf:		On successful return, Noise floor
 *
 * returns:	The channel on success, error on failure
 */
int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
{
	struct cmd_ds_802_11_rssi cmd;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	BUG_ON(rssi == NULL);
	BUG_ON(nf == NULL);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	/* Average SNR over last 8 beacons */
	cmd.n_or_snr = cpu_to_le16(8);

	ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
	if (ret == 0) {
		*nf = CAL_NF(le16_to_cpu(cmd.nf));
		*rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
	}

	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

/**
 *  lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
 *  to the firmware
 *
 *  @priv:	pointer to &struct lbs_private
 *  @request:	cfg80211 regulatory request structure
 *  @bands:	the device's supported bands and channels
 *
 *  returns:	0 on success, error code on failure
*/
int lbs_set_11d_domain_info(struct lbs_private *priv,
			    struct regulatory_request *request,
			    struct ieee80211_supported_band **bands)
{
	struct cmd_ds_802_11d_domain_info cmd;
	struct mrvl_ie_domain_param_set *domain = &cmd.domain;
	struct ieee80211_country_ie_triplet *t;
	enum ieee80211_band band;
	struct ieee80211_channel *ch;
	u8 num_triplet = 0;
	u8 num_parsed_chan = 0;
	u8 first_channel = 0, next_chan = 0, max_pwr = 0;
	u8 i, flag = 0;
	size_t triplet_size;
	int ret;

	lbs_deb_enter(LBS_DEB_11D);

	memset(&cmd, 0, sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	lbs_deb_11d("Setting country code '%c%c'\n",
		    request->alpha2[0], request->alpha2[1]);

	domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);

	/* Set country code */
	domain->country_code[0] = request->alpha2[0];
	domain->country_code[1] = request->alpha2[1];
	domain->country_code[2] = ' ';

	/* Now set up the channel triplets; firmware is somewhat picky here
	 * and doesn't validate channel numbers and spans; hence it would
	 * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
	 * the last 3 aren't valid channels, the driver is responsible for
	 * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
	 * etc.
	 */
	for (band = 0;
	     (band < IEEE80211_NUM_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
	     band++) {

		if (!bands[band])
			continue;

		for (i = 0;
		     (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
		     i++) {
			ch = &bands[band]->channels[i];
			if (ch->flags & IEEE80211_CHAN_DISABLED)
				continue;

			if (!flag) {
				flag = 1;
				next_chan = first_channel = (u32) ch->hw_value;
				max_pwr = ch->max_power;
				num_parsed_chan = 1;
				continue;
			}

			if ((ch->hw_value == next_chan + 1) &&
					(ch->max_power == max_pwr)) {
				/* Consolidate adjacent channels */
				next_chan++;
				num_parsed_chan++;
			} else {
				/* Add this triplet */
				lbs_deb_11d("11D triplet (%d, %d, %d)\n",
					first_channel, num_parsed_chan,
					max_pwr);
				t = &domain->triplet[num_triplet];
				t->chans.first_channel = first_channel;
				t->chans.num_channels = num_parsed_chan;
				t->chans.max_power = max_pwr;
				num_triplet++;
				flag = 0;
			}
		}

		if (flag) {
			/* Add last triplet */
			lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
				num_parsed_chan, max_pwr);
			t = &domain->triplet[num_triplet];
			t->chans.first_channel = first_channel;
			t->chans.num_channels = num_parsed_chan;
			t->chans.max_power = max_pwr;
			num_triplet++;
		}
	}

	lbs_deb_11d("# triplets %d\n", num_triplet);

	/* Set command header sizes */
	triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
	domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
					triplet_size);

	lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
			(u8 *) &cmd.domain.country_code,
			le16_to_cpu(domain->header.len));

	cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
				   sizeof(cmd.action) +
				   sizeof(cmd.domain.header) +
				   sizeof(cmd.domain.country_code) +
				   triplet_size);

	ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);

	lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
	return ret;
}

/**
 *  lbs_get_reg - Read a MAC, Baseband, or RF register
 *
 *  @priv:	pointer to &struct lbs_private
 *  @reg:	register command, one of CMD_MAC_REG_ACCESS,
 *		CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 *  @offset:	byte offset of the register to get
 *  @value:	on success, the value of the register at 'offset'
 *
 *  returns:	0 on success, error code on failure
*/
int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
{
	struct cmd_ds_reg_access cmd;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	BUG_ON(value == NULL);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_GET);

	if (reg != CMD_MAC_REG_ACCESS &&
	    reg != CMD_BBP_REG_ACCESS &&
	    reg != CMD_RF_REG_ACCESS) {
		ret = -EINVAL;
		goto out;
	}

	ret = lbs_cmd_with_response(priv, reg, &cmd);
	if (ret) {
		if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
			*value = cmd.value.bbp_rf;
		else if (reg == CMD_MAC_REG_ACCESS)
			*value = le32_to_cpu(cmd.value.mac);
	}

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

/**
 *  lbs_set_reg - Write a MAC, Baseband, or RF register
 *
 *  @priv:	pointer to &struct lbs_private
 *  @reg:	register command, one of CMD_MAC_REG_ACCESS,
 *		CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 *  @offset:	byte offset of the register to set
 *  @value:	the value to write to the register at 'offset'
 *
 *  returns:	0 on success, error code on failure
*/
int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
{
	struct cmd_ds_reg_access cmd;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
		cmd.value.bbp_rf = (u8) (value & 0xFF);
	else if (reg == CMD_MAC_REG_ACCESS)
		cmd.value.mac = cpu_to_le32(value);
	else {
		ret = -EINVAL;
		goto out;
	}

	ret = lbs_cmd_with_response(priv, reg, &cmd);

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

static void lbs_queue_cmd(struct lbs_private *priv,
			  struct cmd_ctrl_node *cmdnode)
{
	unsigned long flags;
	int addtail = 1;

	lbs_deb_enter(LBS_DEB_HOST);

	if (!cmdnode) {
		lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
		goto done;
	}
	if (!cmdnode->cmdbuf->size) {
		lbs_deb_host("DNLD_CMD: cmd size is zero\n");
		goto done;
	}
	cmdnode->result = 0;

	/* Exit_PS command needs to be queued in the header always. */
	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
		struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;

		if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
			if (priv->psstate != PS_STATE_FULL_POWER)
				addtail = 0;
		}
	}

	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
		addtail = 0;

	spin_lock_irqsave(&priv->driver_lock, flags);

	if (addtail)
		list_add_tail(&cmdnode->list, &priv->cmdpendingq);
	else
		list_add(&cmdnode->list, &priv->cmdpendingq);

	spin_unlock_irqrestore(&priv->driver_lock, flags);

	lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
		     le16_to_cpu(cmdnode->cmdbuf->command));

done:
	lbs_deb_leave(LBS_DEB_HOST);
}

static void lbs_submit_command(struct lbs_private *priv,
			       struct cmd_ctrl_node *cmdnode)
{
	unsigned long flags;
	struct cmd_header *cmd;
	uint16_t cmdsize;
	uint16_t command;
	int timeo = 3 * HZ;
	int ret;

	lbs_deb_enter(LBS_DEB_HOST);

	cmd = cmdnode->cmdbuf;

	spin_lock_irqsave(&priv->driver_lock, flags);
	priv->cur_cmd = cmdnode;
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	cmdsize = le16_to_cpu(cmd->size);
	command = le16_to_cpu(cmd->command);

	/* These commands take longer */
	if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
		timeo = 5 * HZ;

	lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
		     command, le16_to_cpu(cmd->seqnum), cmdsize);
	lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);

	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);

	if (ret) {
		netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
			    ret);
		/* Let the timer kick in and retry, and potentially reset
		   the whole thing if the condition persists */
		timeo = HZ/4;
	}

	if (command == CMD_802_11_DEEP_SLEEP) {
		if (priv->is_auto_deep_sleep_enabled) {
			priv->wakeup_dev_required = 1;
			priv->dnld_sent = 0;
		}
		priv->is_deep_sleep = 1;
		lbs_complete_command(priv, cmdnode, 0);
	} else {
		/* Setup the timer after transmit command */
		mod_timer(&priv->command_timer, jiffies + timeo);
	}

	lbs_deb_leave(LBS_DEB_HOST);
}

/*
 *  This function inserts command node to cmdfreeq
 *  after cleans it. Requires priv->driver_lock held.
 */
static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
					 struct cmd_ctrl_node *cmdnode)
{
	lbs_deb_enter(LBS_DEB_HOST);

	if (!cmdnode)
		goto out;

	cmdnode->callback = NULL;
	cmdnode->callback_arg = 0;

	memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);

	list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 out:
	lbs_deb_leave(LBS_DEB_HOST);
}

static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
	struct cmd_ctrl_node *ptempcmd)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->driver_lock, flags);
	__lbs_cleanup_and_insert_cmd(priv, ptempcmd);
	spin_unlock_irqrestore(&priv->driver_lock, flags);
}

void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
			  int result)
{
	cmd->result = result;
	cmd->cmdwaitqwoken = 1;
	wake_up_interruptible(&cmd->cmdwait_q);

	if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
		__lbs_cleanup_and_insert_cmd(priv, cmd);
	priv->cur_cmd = NULL;
}

int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
{
	struct cmd_ds_802_11_radio_control cmd;
	int ret = -EINVAL;

	lbs_deb_enter(LBS_DEB_CMD);

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	/* Only v8 and below support setting the preamble */
	if (priv->fwrelease < 0x09000000) {
		switch (preamble) {
		case RADIO_PREAMBLE_SHORT:
		case RADIO_PREAMBLE_AUTO:
		case RADIO_PREAMBLE_LONG:
			cmd.control = cpu_to_le16(preamble);
			break;
		default:
			goto out;
		}
	}

	if (radio_on)
		cmd.control |= cpu_to_le16(0x1);
	else {
		cmd.control &= cpu_to_le16(~0x1);
		priv->txpower_cur = 0;
	}

	lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
		    radio_on ? "ON" : "OFF", preamble);

	priv->radio_on = radio_on;

	ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);

out:
	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}

void lbs_set_mac_control(struct lbs_private *priv)
{
	struct cmd_ds_mac_control cmd;

	lbs_deb_enter(LBS_DEB_CMD);

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(priv->mac_control);
	cmd.reserved = 0;

	lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));

	lbs_deb_leave(LBS_DEB_CMD);
}

/**
 *  lbs_allocate_cmd_buffer - allocates the command buffer and links
 *  it to command free queue
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	0 for success or -1 on error
 */
int lbs_allocate_cmd_buffer(struct lbs_private *priv)
{
	int ret = 0;
	u32 bufsize;
	u32 i;
	struct cmd_ctrl_node *cmdarray;

	lbs_deb_enter(LBS_DEB_HOST);

	/* Allocate and initialize the command array */
	bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
	if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
		lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
		ret = -1;
		goto done;
	}
	priv->cmd_array = cmdarray;

	/* Allocate and initialize each command buffer in the command array */
	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
		if (!cmdarray[i].cmdbuf) {
			lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
			ret = -1;
			goto done;
		}
	}

	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		init_waitqueue_head(&cmdarray[i].cmdwait_q);
		lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
	}
	ret = 0;

done:
	lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
	return ret;
}

/**
 *  lbs_free_cmd_buffer - free the command buffer
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	0 for success
 */
int lbs_free_cmd_buffer(struct lbs_private *priv)
{
	struct cmd_ctrl_node *cmdarray;
	unsigned int i;

	lbs_deb_enter(LBS_DEB_HOST);

	/* need to check if cmd array is allocated or not */
	if (priv->cmd_array == NULL) {
		lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
		goto done;
	}

	cmdarray = priv->cmd_array;

	/* Release shared memory buffers */
	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		if (cmdarray[i].cmdbuf) {
			kfree(cmdarray[i].cmdbuf);
			cmdarray[i].cmdbuf = NULL;
		}
	}

	/* Release cmd_ctrl_node */
	if (priv->cmd_array) {
		kfree(priv->cmd_array);
		priv->cmd_array = NULL;
	}

done:
	lbs_deb_leave(LBS_DEB_HOST);
	return 0;
}

/**
 *  lbs_get_free_cmd_node - gets a free command node if available in
 *  command free queue
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	A pointer to &cmd_ctrl_node structure on success
 *		or %NULL on error
 */
static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
{
	struct cmd_ctrl_node *tempnode;
	unsigned long flags;

	lbs_deb_enter(LBS_DEB_HOST);

	if (!priv)
		return NULL;

	spin_lock_irqsave(&priv->driver_lock, flags);

	if (!list_empty(&priv->cmdfreeq)) {
		tempnode = list_first_entry(&priv->cmdfreeq,
					    struct cmd_ctrl_node, list);
		list_del(&tempnode->list);
	} else {
		lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
		tempnode = NULL;
	}

	spin_unlock_irqrestore(&priv->driver_lock, flags);

	lbs_deb_leave(LBS_DEB_HOST);
	return tempnode;
}

/**
 *  lbs_execute_next_command - execute next command in command
 *  pending queue. Will put firmware back to PS mode if applicable.
 *
 *  @priv:	A pointer to &struct lbs_private structure
 *
 *  returns:	0 on success or -1 on error
 */
int lbs_execute_next_command(struct lbs_private *priv)
{
	struct cmd_ctrl_node *cmdnode = NULL;
	struct cmd_header *cmd;
	unsigned long flags;
	int ret = 0;

	/* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
	 * only caller to us is lbs_thread() and we get even when a
	 * data packet is received */
	lbs_deb_enter(LBS_DEB_THREAD);

	spin_lock_irqsave(&priv->driver_lock, flags);

	if (priv->cur_cmd) {
		netdev_alert(priv->dev,
			     "EXEC_NEXT_CMD: already processing command!\n");
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		ret = -1;
		goto done;
	}

	if (!list_empty(&priv->cmdpendingq)) {
		cmdnode = list_first_entry(&priv->cmdpendingq,
					   struct cmd_ctrl_node, list);
	}

	spin_unlock_irqrestore(&priv->driver_lock, flags);

	if (cmdnode) {
		cmd = cmdnode->cmdbuf;

		if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
			if ((priv->psstate == PS_STATE_SLEEP) ||
			    (priv->psstate == PS_STATE_PRE_SLEEP)) {
				lbs_deb_host(
				       "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
				       le16_to_cpu(cmd->command),
				       priv->psstate);
				ret = -1;
				goto done;
			}
			lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
				     "0x%04x in psstate %d\n",
				     le16_to_cpu(cmd->command), priv->psstate);
		} else if (priv->psstate != PS_STATE_FULL_POWER) {
			/*
			 * 1. Non-PS command:
			 * Queue it. set needtowakeup to TRUE if current state
			 * is SLEEP, otherwise call send EXIT_PS.
			 * 2. PS command but not EXIT_PS:
			 * Ignore it.
			 * 3. PS command EXIT_PS:
			 * Set needtowakeup to TRUE if current state is SLEEP,
			 * otherwise send this command down to firmware
			 * immediately.
			 */
			if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
				/*  Prepare to send Exit PS,
				 *  this non PS command will be sent later */
				if ((priv->psstate == PS_STATE_SLEEP)
				    || (priv->psstate == PS_STATE_PRE_SLEEP)
				    ) {
					/* w/ new scheme, it will not reach here.
					   since it is blocked in main_thread. */
					priv->needtowakeup = 1;
				} else {
					lbs_set_ps_mode(priv,
							PS_MODE_ACTION_EXIT_PS,
							false);
				}

				ret = 0;
				goto done;
			} else {
				/*
				 * PS command. Ignore it if it is not Exit_PS.
				 * otherwise send it down immediately.
				 */
				struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];

				lbs_deb_host(
				       "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
				       psm->action);
				if (psm->action !=
				    cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
					lbs_deb_host(
					       "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
					list_del(&cmdnode->list);
					spin_lock_irqsave(&priv->driver_lock, flags);
					lbs_complete_command(priv, cmdnode, 0);
					spin_unlock_irqrestore(&priv->driver_lock, flags);

					ret = 0;
					goto done;
				}

				if ((priv->psstate == PS_STATE_SLEEP) ||
				    (priv->psstate == PS_STATE_PRE_SLEEP)) {
					lbs_deb_host(
					       "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
					list_del(&cmdnode->list);
					spin_lock_irqsave(&priv->driver_lock, flags);
					lbs_complete_command(priv, cmdnode, 0);
					spin_unlock_irqrestore(&priv->driver_lock, flags);
					priv->needtowakeup = 1;

					ret = 0;
					goto done;
				}

				lbs_deb_host(
				       "EXEC_NEXT_CMD: sending EXIT_PS\n");
			}
		}
		list_del(&cmdnode->list);
		lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
			    le16_to_cpu(cmd->command));
		lbs_submit_command(priv, cmdnode);
	} else {
		/*
		 * check if in power save mode, if yes, put the device back
		 * to PS mode
		 */
#ifdef TODO
		/*
		 * This was the old code for libertas+wext. Someone that
		 * understands this beast should re-code it in a sane way.
		 *
		 * I actually don't understand why this is related to WPA
		 * and to connection status, shouldn't powering should be
		 * independ of such things?
		 */
		if ((priv->psmode != LBS802_11POWERMODECAM) &&
		    (priv->psstate == PS_STATE_FULL_POWER) &&
		    ((priv->connect_status == LBS_CONNECTED) ||
		    lbs_mesh_connected(priv))) {
			if (priv->secinfo.WPAenabled ||
			    priv->secinfo.WPA2enabled) {
				/* check for valid WPA group keys */
				if (priv->wpa_mcast_key.len ||
				    priv->wpa_unicast_key.len) {
					lbs_deb_host(
					       "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
					       " go back to PS_SLEEP");
					lbs_set_ps_mode(priv,
							PS_MODE_ACTION_ENTER_PS,
							false);
				}
			} else {
				lbs_deb_host(
				       "EXEC_NEXT_CMD: cmdpendingq empty, "
				       "go back to PS_SLEEP");
				lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
						false);
			}
		}
#endif
	}

	ret = 0;
done:
	lbs_deb_leave(LBS_DEB_THREAD);
	return ret;
}

static void lbs_send_confirmsleep(struct lbs_private *priv)
{
	unsigned long flags;
	int ret;

	lbs_deb_enter(LBS_DEB_HOST);
	lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
		sizeof(confirm_sleep));

	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
		sizeof(confirm_sleep));
	if (ret) {
		netdev_alert(priv->dev, "confirm_sleep failed\n");
		goto out;
	}

	spin_lock_irqsave(&priv->driver_lock, flags);

	/* We don't get a response on the sleep-confirmation */
	priv->dnld_sent = DNLD_RES_RECEIVED;

	if (priv->is_host_sleep_configured) {
		priv->is_host_sleep_activated = 1;
		wake_up_interruptible(&priv->host_sleep_q);
	}

	/* If nothing to do, go back to sleep (?) */
	if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
		priv->psstate = PS_STATE_SLEEP;

	spin_unlock_irqrestore(&priv->driver_lock, flags);

out:
	lbs_deb_leave(LBS_DEB_HOST);
}

/**
 * lbs_ps_confirm_sleep - checks condition and prepares to
 * send sleep confirm command to firmware if ok
 *
 * @priv:	A pointer to &struct lbs_private structure
 *
 * returns:	n/a
 */
void lbs_ps_confirm_sleep(struct lbs_private *priv)
{
	unsigned long flags =0;
	int allowed = 1;

	lbs_deb_enter(LBS_DEB_HOST);

	spin_lock_irqsave(&priv->driver_lock, flags);
	if (priv->dnld_sent) {
		allowed = 0;
		lbs_deb_host("dnld_sent was set\n");
	}

	/* In-progress command? */
	if (priv->cur_cmd) {
		allowed = 0;
		lbs_deb_host("cur_cmd was set\n");
	}

	/* Pending events or command responses? */
	if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
		allowed = 0;
		lbs_deb_host("pending events or command responses\n");
	}
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	if (allowed) {
		lbs_deb_host("sending lbs_ps_confirm_sleep\n");
		lbs_send_confirmsleep(priv);
	} else {
		lbs_deb_host("sleep confirm has been delayed\n");
	}

	lbs_deb_leave(LBS_DEB_HOST);
}


/**
 * lbs_set_tpc_cfg - Configures the transmission power control functionality
 *
 * @priv:	A pointer to &struct lbs_private structure
 * @enable:	Transmission power control enable
 * @p0:		Power level when link quality is good (dBm).
 * @p1:		Power level when link quality is fair (dBm).
 * @p2:		Power level when link quality is poor (dBm).
 * @usesnr:	Use Signal to Noise Ratio in TPC
 *
 * returns:	0 on success
 */
int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
		int8_t p2, int usesnr)
{
	struct cmd_ds_802_11_tpc_cfg cmd;
	int ret;

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	cmd.enable = !!enable;
	cmd.usesnr = !!usesnr;
	cmd.P0 = p0;
	cmd.P1 = p1;
	cmd.P2 = p2;

	ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);

	return ret;
}

/**
 * lbs_set_power_adapt_cfg - Configures the power adaptation settings
 *
 * @priv:	A pointer to &struct lbs_private structure
 * @enable:	Power adaptation enable
 * @p0:		Power level for 1, 2, 5.5 and 11 Mbps (dBm).
 * @p1:		Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
 * @p2:		Power level for 48 and 54 Mbps (dBm).
 *
 * returns:	0 on Success
 */

int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
		int8_t p1, int8_t p2)
{
	struct cmd_ds_802_11_pa_cfg cmd;
	int ret;

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	cmd.enable = !!enable;
	cmd.P0 = p0;
	cmd.P1 = p1;
	cmd.P2 = p2;

	ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);

	return ret;
}


struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
	uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
	int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
	unsigned long callback_arg)
{
	struct cmd_ctrl_node *cmdnode;

	lbs_deb_enter(LBS_DEB_HOST);

	if (priv->surpriseremoved) {
		lbs_deb_host("PREP_CMD: card removed\n");
		cmdnode = ERR_PTR(-ENOENT);
		goto done;
	}

	/* No commands are allowed in Deep Sleep until we toggle the GPIO
	 * to wake up the card and it has signaled that it's ready.
	 */
	if (!priv->is_auto_deep_sleep_enabled) {
		if (priv->is_deep_sleep) {
			lbs_deb_cmd("command not allowed in deep sleep\n");
			cmdnode = ERR_PTR(-EBUSY);
			goto done;
		}
	}

	cmdnode = lbs_get_free_cmd_node(priv);
	if (cmdnode == NULL) {
		lbs_deb_host("PREP_CMD: cmdnode is NULL\n");

		/* Wake up main thread to execute next command */
		wake_up_interruptible(&priv->waitq);
		cmdnode = ERR_PTR(-ENOBUFS);
		goto done;
	}

	cmdnode->callback = callback;
	cmdnode->callback_arg = callback_arg;

	/* Copy the incoming command to the buffer */
	memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);

	/* Set sequence number, clean result, move to buffer */
	priv->seqnum++;
	cmdnode->cmdbuf->command = cpu_to_le16(command);
	cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
	cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
	cmdnode->cmdbuf->result  = 0;

	lbs_deb_host("PREP_CMD: command 0x%04x\n", command);

	cmdnode->cmdwaitqwoken = 0;
	lbs_queue_cmd(priv, cmdnode);
	wake_up_interruptible(&priv->waitq);

 done:
	lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
	return cmdnode;
}

void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
	struct cmd_header *in_cmd, int in_cmd_size)
{
	lbs_deb_enter(LBS_DEB_CMD);
	__lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
		lbs_cmd_async_callback, 0);
	lbs_deb_leave(LBS_DEB_CMD);
}

int __lbs_cmd(struct lbs_private *priv, uint16_t command,
	      struct cmd_header *in_cmd, int in_cmd_size,
	      int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
	      unsigned long callback_arg)
{
	struct cmd_ctrl_node *cmdnode;
	unsigned long flags;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_HOST);

	cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
				  callback, callback_arg);
	if (IS_ERR(cmdnode)) {
		ret = PTR_ERR(cmdnode);
		goto done;
	}

	might_sleep();
	wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);

	spin_lock_irqsave(&priv->driver_lock, flags);
	ret = cmdnode->result;
	if (ret)
		netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
			    command, ret);

	__lbs_cleanup_and_insert_cmd(priv, cmdnode);
	spin_unlock_irqrestore(&priv->driver_lock, flags);

done:
	lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
	return ret;
}
EXPORT_SYMBOL_GPL(__lbs_cmd);