Free Electrons

Embedded Linux Experts

   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
/**
  * 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)))

/**
 *  @brief Simple callback that copies response back into command
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param extra  	A pointer to the original command structure for which
 *                      'resp' is a response
 *  @param resp         A pointer to the command response
 *
 *  @return 	   	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);

/**
 *  @brief 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.
 *
 *  @param priv         ignored
 *  @param extra        ignored
 *  @param resp         ignored
 *
 *  @return 	   	0 for success
 */
static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
		     struct cmd_header *resp)
{
	return 0;
}


/**
 *  @brief Checks whether a command is allowed in Power Save mode
 *
 *  @param command the command ID
 *  @return 	   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;
}

/**
 *  @brief Updates the hardware details like MAC address and regulatory region
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *
 *  @return 	   	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
	 */
	lbs_pr_info("%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;
		lbs_pr_info("unidentified region code; using the default (USA)\n");
	}

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

	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);

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 {
		lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);

/**
 *  @brief Sets the Power Save mode
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param cmd_action	The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 *                         PS_MODE_ACTION_EXIT_PS)
 *  @param block	Whether to block on a response or not
 *
 *  @return 	   	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))) {
			lbs_pr_err("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 {
			lbs_pr_err("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)
					lbs_pr_err("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) {
				lbs_pr_info("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)
					lbs_pr_info("HOST_SLEEP_ACTIVATE "
							"failed: %d\n", ret);
			}

			if (!wait_event_interruptible_timeout(
						priv->host_sleep_q,
						priv->is_host_sleep_activated,
						(10 * HZ))) {
				lbs_pr_err("host_sleep_q: timer expired\n");
				ret = -1;
			}
		} else {
			lbs_pr_err("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;
}

/**
 *  @brief Set an SNMP MIB value
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param oid  	The OID to set in the firmware
 *  @param val  	Value to set the OID to
 *
 *  @return 	   	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;
}

/**
 *  @brief Get an SNMP MIB value
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param oid  	The OID to retrieve from the firmware
 *  @param out_val  	Location for the returned value
 *
 *  @return 	   	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;
}

/**
 *  @brief Get the min, max, and current TX power
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param curlevel  	Current power level in dBm
 *  @param minlevel  	Minimum supported power level in dBm (optional)
 *  @param maxlevel  	Maximum supported power level in dBm (optional)
 *
 *  @return 	   	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;
}

/**
 *  @brief Set the TX power
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param dbm  	The desired power level in dBm
 *
 *  @return 	   	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;
}

/**
 *  @brief Enable or disable monitor mode (only implemented on OLPC usb8388 FW)
 *
 *  @param priv        A pointer to struct lbs_private structure
 *  @param enable      1 to enable monitor mode, 0 to disable
 *
 *  @return            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;
}

/**
 *  @brief Get the radio channel
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *
 *  @return 	   	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;
}

/**
 *  @brief Set the radio channel
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param channel  	The desired channel, or 0 to clear a locked channel
 *
 *  @return 	   	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;
}

/**
 *  @brief Get current RSSI and noise floor
 *
 *  @param priv		A pointer to struct lbs_private structure
 *  @param rssi		On successful return, signal level in mBm
 *
 *  @return 	   	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;
}

/**
 *  @brief Send regulatory and 802.11d domain information to the firmware
 *
 *  @param priv		pointer to struct lbs_private
 *  @param request	cfg80211 regulatory request structure
 *  @param bands	the device's supported bands and channels
 *
 *  @return		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;
}

/**
 *  @brief Read a MAC, Baseband, or RF register
 *
 *  @param priv		pointer to struct lbs_private
 *  @param cmd		register command, one of CMD_MAC_REG_ACCESS,
 *                        CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 *  @param offset       byte offset of the register to get
 *  @param value        on success, the value of the register at 'offset'
 *
 *  @return		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;
}

/**
 *  @brief Write a MAC, Baseband, or RF register
 *
 *  @param priv		pointer to struct lbs_private
 *  @param cmd		register command, one of CMD_MAC_REG_ACCESS,
 *                        CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 *  @param offset       byte offset of the register to set
 *  @param value        the value to write to the register at 'offset'
 *
 *  @return		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) {
		lbs_pr_info("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);
}

/**
 *  @brief This function allocates the command buffer and link
 *  it to command free queue.
 *
 *  @param priv		A pointer to struct lbs_private structure
 *  @return 		0 or -1
 */
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;
}

/**
 *  @brief This function frees the command buffer.
 *
 *  @param priv		A pointer to struct lbs_private structure
 *  @return 		0 or -1
 */
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;
}

/**
 *  @brief This function gets a free command node if available in
 *  command free queue.
 *
 *  @param priv		A pointer to struct lbs_private structure
 *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
 */
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;
}

/**
 *  @brief This function executes next command in command
 *  pending queue. It will put firmware back to PS mode
 *  if applicable.
 *
 *  @param priv     A pointer to struct lbs_private structure
 *  @return 	   0 or -1
 */
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) {
		lbs_pr_alert( "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) {
		lbs_pr_alert("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);
}

/**
 *  @brief This function checks condition and prepares to
 *  send sleep confirm command to firmware if ok.
 *
 *  @param priv    	A pointer to struct lbs_private structure
 *  @param psmode  	Power Saving mode
 *  @return 	   	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);
}


/**
 * @brief Configures the transmission power control functionality.
 *
 * @param priv		A pointer to struct lbs_private structure
 * @param enable	Transmission power control enable
 * @param p0		Power level when link quality is good (dBm).
 * @param p1		Power level when link quality is fair (dBm).
 * @param p2		Power level when link quality is poor (dBm).
 * @param usesnr	Use Signal to Noise Ratio in TPC
 *
 * @return 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;
}

/**
 * @brief Configures the power adaptation settings.
 *
 * @param priv		A pointer to struct lbs_private structure
 * @param enable	Power adaptation enable
 * @param p0		Power level for 1, 2, 5.5 and 11 Mbps (dBm).
 * @param p1		Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
 * @param p2		Power level for 48 and 54 Mbps (dBm).
 *
 * @return 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)
		lbs_pr_info("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);