aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-drv.c
blob: 39aad9893e0b1d6df218655959b77e292721babe (plain) (blame)
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
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/completion.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/vmalloc.h>

#include "iwl-drv.h"
#include "iwl-debug.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-agn-hw.h"
#include "iwl-fw.h"
#include "iwl-config.h"
#include "iwl-modparams.h"

/* private includes */
#include "iwl-fw-file.h"

/******************************************************************************
 *
 * module boiler plate
 *
 ******************************************************************************/

/*
 * module name, copyright, version, etc.
 */
#define DRV_DESCRIPTION	"Intel(R) Wireless WiFi driver for Linux"

#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif

#define DRV_VERSION     IWLWIFI_VERSION VD

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

#ifdef CONFIG_IWLWIFI_DEBUGFS
static struct dentry *iwl_dbgfs_root;
#endif

/**
 * struct iwl_drv - drv common data
 * @list: list of drv structures using this opmode
 * @fw: the iwl_fw structure
 * @op_mode: the running op_mode
 * @trans: transport layer
 * @dev: for debug prints only
 * @cfg: configuration struct
 * @fw_index: firmware revision to try loading
 * @firmware_name: composite filename of ucode file to load
 * @request_firmware_complete: the firmware has been obtained from user space
 */
struct iwl_drv {
	struct list_head list;
	struct iwl_fw fw;

	struct iwl_op_mode *op_mode;
	struct iwl_trans *trans;
	struct device *dev;
	const struct iwl_cfg *cfg;

	int fw_index;                   /* firmware we're trying to load */
	char firmware_name[25];         /* name of firmware file to load */

	struct completion request_firmware_complete;

#ifdef CONFIG_IWLWIFI_DEBUGFS
	struct dentry *dbgfs_drv;
	struct dentry *dbgfs_trans;
	struct dentry *dbgfs_op_mode;
#endif
};

enum {
	DVM_OP_MODE =	0,
	MVM_OP_MODE =	1,
};

/* Protects the table contents, i.e. the ops pointer & drv list */
static struct mutex iwlwifi_opmode_table_mtx;
static struct iwlwifi_opmode_table {
	const char *name;			/* name: iwldvm, iwlmvm, etc */
	const struct iwl_op_mode_ops *ops;	/* pointer to op_mode ops */
	struct list_head drv;		/* list of devices using this op_mode */
} iwlwifi_opmode_table[] = {		/* ops set when driver is initialized */
	[DVM_OP_MODE] = { .name = "iwldvm", .ops = NULL },
	[MVM_OP_MODE] = { .name = "iwlmvm", .ops = NULL },
};

/*
 * struct fw_sec: Just for the image parsing proccess.
 * For the fw storage we are using struct fw_desc.
 */
struct fw_sec {
	const void *data;		/* the sec data */
	size_t size;			/* section size */
	u32 offset;			/* offset of writing in the device */
};

static void iwl_free_fw_desc(struct iwl_drv *drv, struct fw_desc *desc)
{
	vfree(desc->data);
	desc->data = NULL;
	desc->len = 0;
}

static void iwl_free_fw_img(struct iwl_drv *drv, struct fw_img *img)
{
	int i;
	for (i = 0; i < IWL_UCODE_SECTION_MAX; i++)
		iwl_free_fw_desc(drv, &img->sec[i]);
}

static void iwl_dealloc_ucode(struct iwl_drv *drv)
{
	int i;
	for (i = 0; i < IWL_UCODE_TYPE_MAX; i++)
		iwl_free_fw_img(drv, drv->fw.img + i);
}

static int iwl_alloc_fw_desc(struct iwl_drv *drv, struct fw_desc *desc,
			     struct fw_sec *sec)
{
	void *data;

	desc->data = NULL;

	if (!sec || !sec->size)
		return -EINVAL;

	data = vmalloc(sec->size);
	if (!data)
		return -ENOMEM;

	desc->len = sec->size;
	desc->offset = sec->offset;
	memcpy(data, sec->data, desc->len);
	desc->data = data;

	return 0;
}

static void iwl_req_fw_callback(const struct firmware *ucode_raw,
				void *context);

#define UCODE_EXPERIMENTAL_INDEX	100
#define UCODE_EXPERIMENTAL_TAG		"exp"

static int iwl_request_firmware(struct iwl_drv *drv, bool first)
{
	const char *name_pre = drv->cfg->fw_name_pre;
	char tag[8];

	if (first) {
#ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
		drv->fw_index = UCODE_EXPERIMENTAL_INDEX;
		strcpy(tag, UCODE_EXPERIMENTAL_TAG);
	} else if (drv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
#endif
		drv->fw_index = drv->cfg->ucode_api_max;
		sprintf(tag, "%d", drv->fw_index);
	} else {
		drv->fw_index--;
		sprintf(tag, "%d", drv->fw_index);
	}

	if (drv->fw_index < drv->cfg->ucode_api_min) {
		IWL_ERR(drv, "no suitable firmware found!\n");
		return -ENOENT;
	}

	sprintf(drv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");

	IWL_DEBUG_INFO(drv, "attempting to load firmware %s'%s'\n",
		       (drv->fw_index == UCODE_EXPERIMENTAL_INDEX)
				? "EXPERIMENTAL " : "",
		       drv->firmware_name);

	return request_firmware_nowait(THIS_MODULE, 1, drv->firmware_name,
				       drv->trans->dev,
				       GFP_KERNEL, drv, iwl_req_fw_callback);
}

struct fw_img_parsing {
	struct fw_sec sec[IWL_UCODE_SECTION_MAX];
	int sec_counter;
};

/*
 * struct fw_sec_parsing: to extract fw section and it's offset from tlv
 */
struct fw_sec_parsing {
	__le32 offset;
	const u8 data[];
} __packed;

/**
 * struct iwl_tlv_calib_data - parse the default calib data from TLV
 *
 * @ucode_type: the uCode to which the following default calib relates.
 * @calib: default calibrations.
 */
struct iwl_tlv_calib_data {
	__le32 ucode_type;
	struct iwl_tlv_calib_ctrl calib;
} __packed;

struct iwl_firmware_pieces {
	struct fw_img_parsing img[IWL_UCODE_TYPE_MAX];

	u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
	u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
};

/*
 * These functions are just to extract uCode section data from the pieces
 * structure.
 */
static struct fw_sec *get_sec(struct iwl_firmware_pieces *pieces,
			      enum iwl_ucode_type type,
			      int  sec)
{
	return &pieces->img[type].sec[sec];
}

static void set_sec_data(struct iwl_firmware_pieces *pieces,
			 enum iwl_ucode_type type,
			 int sec,
			 const void *data)
{
	pieces->img[type].sec[sec].data = data;
}

static void set_sec_size(struct iwl_firmware_pieces *pieces,
			 enum iwl_ucode_type type,
			 int sec,
			 size_t size)
{
	pieces->img[type].sec[sec].size = size;
}

static size_t get_sec_size(struct iwl_firmware_pieces *pieces,
			   enum iwl_ucode_type type,
			   int sec)
{
	return pieces->img[type].sec[sec].size;
}

static void set_sec_offset(struct iwl_firmware_pieces *pieces,
			   enum iwl_ucode_type type,
			   int sec,
			   u32 offset)
{
	pieces->img[type].sec[sec].offset = offset;
}

/*
 * Gets uCode section from tlv.
 */
static int iwl_store_ucode_sec(struct iwl_firmware_pieces *pieces,
			       const void *data, enum iwl_ucode_type type,
			       int size)
{
	struct fw_img_parsing *img;
	struct fw_sec *sec;
	struct fw_sec_parsing *sec_parse;

	if (WARN_ON(!pieces || !data || type >= IWL_UCODE_TYPE_MAX))
		return -1;

	sec_parse = (struct fw_sec_parsing *)data;

	img = &pieces->img[type];
	sec = &img->sec[img->sec_counter];

	sec->offset = le32_to_cpu(sec_parse->offset);
	sec->data = sec_parse->data;
	sec->size = size - sizeof(sec_parse->offset);

	++img->sec_counter;

	return 0;
}

static int iwl_set_default_calib(struct iwl_drv *drv, const u8 *data)
{
	struct iwl_tlv_calib_data *def_calib =
					(struct iwl_tlv_calib_data *)data;
	u32 ucode_type = le32_to_cpu(def_calib->ucode_type);
	if (ucode_type >= IWL_UCODE_TYPE_MAX) {
		IWL_ERR(drv, "Wrong ucode_type %u for default calibration.\n",
			ucode_type);
		return -EINVAL;
	}
	drv->fw.default_calib[ucode_type].flow_trigger =
		def_calib->calib.flow_trigger;
	drv->fw.default_calib[ucode_type].event_trigger =
		def_calib->calib.event_trigger;

	return 0;
}

static int iwl_parse_v1_v2_firmware(struct iwl_drv *drv,
				    const struct firmware *ucode_raw,
				    struct iwl_firmware_pieces *pieces)
{
	struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
	u32 api_ver, hdr_size, build;
	char buildstr[25];
	const u8 *src;

	drv->fw.ucode_ver = le32_to_cpu(ucode->ver);
	api_ver = IWL_UCODE_API(drv->fw.ucode_ver);

	switch (api_ver) {
	default:
		hdr_size = 28;
		if (ucode_raw->size < hdr_size) {
			IWL_ERR(drv, "File size too small!\n");
			return -EINVAL;
		}
		build = le32_to_cpu(ucode->u.v2.build);
		set_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST,
			     le32_to_cpu(ucode->u.v2.inst_size));
		set_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA,
			     le32_to_cpu(ucode->u.v2.data_size));
		set_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST,
			     le32_to_cpu(ucode->u.v2.init_size));
		set_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA,
			     le32_to_cpu(ucode->u.v2.init_data_size));
		src = ucode->u.v2.data;
		break;
	case 0:
	case 1:
	case 2:
		hdr_size = 24;
		if (ucode_raw->size < hdr_size) {
			IWL_ERR(drv, "File size too small!\n");
			return -EINVAL;
		}
		build = 0;
		set_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST,
			     le32_to_cpu(ucode->u.v1.inst_size));
		set_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA,
			     le32_to_cpu(ucode->u.v1.data_size));
		set_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST,
			     le32_to_cpu(ucode->u.v1.init_size));
		set_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA,
			     le32_to_cpu(ucode->u.v1.init_data_size));
		src = ucode->u.v1.data;
		break;
	}

	if (build)
		sprintf(buildstr, " build %u%s", build,
		       (drv->fw_index == UCODE_EXPERIMENTAL_INDEX)
				? " (EXP)" : "");
	else
		buildstr[0] = '\0';

	snprintf(drv->fw.fw_version,
		 sizeof(drv->fw.fw_version),
		 "%u.%u.%u.%u%s",
		 IWL_UCODE_MAJOR(drv->fw.ucode_ver),
		 IWL_UCODE_MINOR(drv->fw.ucode_ver),
		 IWL_UCODE_API(drv->fw.ucode_ver),
		 IWL_UCODE_SERIAL(drv->fw.ucode_ver),
		 buildstr);

	/* Verify size of file vs. image size info in file's header */

	if (ucode_raw->size != hdr_size +
	    get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST) +
	    get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA) +
	    get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST) +
	    get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA)) {

		IWL_ERR(drv,
			"uCode file size %d does not match expected size\n",
			(int)ucode_raw->size);
		return -EINVAL;
	}


	set_sec_data(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST, src);
	src += get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST);
	set_sec_offset(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST,
		       IWLAGN_RTC_INST_LOWER_BOUND);
	set_sec_data(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA, src);
	src += get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA);
	set_sec_offset(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA,
		       IWLAGN_RTC_DATA_LOWER_BOUND);
	set_sec_data(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST, src);
	src += get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST);
	set_sec_offset(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST,
		       IWLAGN_RTC_INST_LOWER_BOUND);
	set_sec_data(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA, src);
	src += get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA);
	set_sec_offset(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA,
		       IWLAGN_RTC_DATA_LOWER_BOUND);
	return 0;
}

static int iwl_parse_tlv_firmware(struct iwl_drv *drv,
				const struct firmware *ucode_raw,
				struct iwl_firmware_pieces *pieces,
				struct iwl_ucode_capabilities *capa)
{
	struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
	struct iwl_ucode_tlv *tlv;
	size_t len = ucode_raw->size;
	const u8 *data;
	u32 tlv_len;
	enum iwl_ucode_tlv_type tlv_type;
	const u8 *tlv_data;
	char buildstr[25];
	u32 build;

	if (len < sizeof(*ucode)) {
		IWL_ERR(drv, "uCode has invalid length: %zd\n", len);
		return -EINVAL;
	}

	if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
		IWL_ERR(drv, "invalid uCode magic: 0X%x\n",
			le32_to_cpu(ucode->magic));
		return -EINVAL;
	}

	drv->fw.ucode_ver = le32_to_cpu(ucode->ver);
	build = le32_to_cpu(ucode->build);

	if (build)
		sprintf(buildstr, " build %u%s", build,
		       (drv->fw_index == UCODE_EXPERIMENTAL_INDEX)
				? " (EXP)" : "");
	else
		buildstr[0] = '\0';

	snprintf(drv->fw.fw_version,
		 sizeof(drv->fw.fw_version),
		 "%u.%u.%u.%u%s",
		 IWL_UCODE_MAJOR(drv->fw.ucode_ver),
		 IWL_UCODE_MINOR(drv->fw.ucode_ver),
		 IWL_UCODE_API(drv->fw.ucode_ver),
		 IWL_UCODE_SERIAL(drv->fw.ucode_ver),
		 buildstr);

	data = ucode->data;

	len -= sizeof(*ucode);

	while (len >= sizeof(*tlv)) {
		len -= sizeof(*tlv);
		tlv = (void *)data;

		tlv_len = le32_to_cpu(tlv->length);
		tlv_type = le32_to_cpu(tlv->type);
		tlv_data = tlv->data;

		if (len < tlv_len) {
			IWL_ERR(drv, "invalid TLV len: %zd/%u\n",
				len, tlv_len);
			return -EINVAL;
		}
		len -= ALIGN(tlv_len, 4);
		data += sizeof(*tlv) + ALIGN(tlv_len, 4);

		switch (tlv_type) {
		case IWL_UCODE_TLV_INST:
			set_sec_data(pieces, IWL_UCODE_REGULAR,
				     IWL_UCODE_SECTION_INST, tlv_data);
			set_sec_size(pieces, IWL_UCODE_REGULAR,
				     IWL_UCODE_SECTION_INST, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_REGULAR,
				       IWL_UCODE_SECTION_INST,
				       IWLAGN_RTC_INST_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_DATA:
			set_sec_data(pieces, IWL_UCODE_REGULAR,
				     IWL_UCODE_SECTION_DATA, tlv_data);
			set_sec_size(pieces, IWL_UCODE_REGULAR,
				     IWL_UCODE_SECTION_DATA, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_REGULAR,
				       IWL_UCODE_SECTION_DATA,
				       IWLAGN_RTC_DATA_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_INIT:
			set_sec_data(pieces, IWL_UCODE_INIT,
				     IWL_UCODE_SECTION_INST, tlv_data);
			set_sec_size(pieces, IWL_UCODE_INIT,
				     IWL_UCODE_SECTION_INST, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_INIT,
				       IWL_UCODE_SECTION_INST,
				       IWLAGN_RTC_INST_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_INIT_DATA:
			set_sec_data(pieces, IWL_UCODE_INIT,
				     IWL_UCODE_SECTION_DATA, tlv_data);
			set_sec_size(pieces, IWL_UCODE_INIT,
				     IWL_UCODE_SECTION_DATA, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_INIT,
				       IWL_UCODE_SECTION_DATA,
				       IWLAGN_RTC_DATA_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_BOOT:
			IWL_ERR(drv, "Found unexpected BOOT ucode\n");
			break;
		case IWL_UCODE_TLV_PROBE_MAX_LEN:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			capa->max_probe_length =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_PAN:
			if (tlv_len)
				goto invalid_tlv_len;
			capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
			break;
		case IWL_UCODE_TLV_FLAGS:
			/* must be at least one u32 */
			if (tlv_len < sizeof(u32))
				goto invalid_tlv_len;
			/* and a proper number of u32s */
			if (tlv_len % sizeof(u32))
				goto invalid_tlv_len;
			/*
			 * This driver only reads the first u32 as
			 * right now no more features are defined,
			 * if that changes then either the driver
			 * will not work with the new firmware, or
			 * it'll not take advantage of new features.
			 */
			capa->flags = le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->init_evtlog_ptr =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->init_evtlog_size =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->init_errlog_ptr =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->inst_evtlog_ptr =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->inst_evtlog_size =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			pieces->inst_errlog_ptr =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
			if (tlv_len)
				goto invalid_tlv_len;
			drv->fw.enhance_sensitivity_table = true;
			break;
		case IWL_UCODE_TLV_WOWLAN_INST:
			set_sec_data(pieces, IWL_UCODE_WOWLAN,
				     IWL_UCODE_SECTION_INST, tlv_data);
			set_sec_size(pieces, IWL_UCODE_WOWLAN,
				     IWL_UCODE_SECTION_INST, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_WOWLAN,
				       IWL_UCODE_SECTION_INST,
				       IWLAGN_RTC_INST_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_WOWLAN_DATA:
			set_sec_data(pieces, IWL_UCODE_WOWLAN,
				     IWL_UCODE_SECTION_DATA, tlv_data);
			set_sec_size(pieces, IWL_UCODE_WOWLAN,
				     IWL_UCODE_SECTION_DATA, tlv_len);
			set_sec_offset(pieces, IWL_UCODE_WOWLAN,
				       IWL_UCODE_SECTION_DATA,
				       IWLAGN_RTC_DATA_LOWER_BOUND);
			break;
		case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			capa->standard_phy_calibration_size =
					le32_to_cpup((__le32 *)tlv_data);
			break;
		 case IWL_UCODE_TLV_SEC_RT:
			iwl_store_ucode_sec(pieces, tlv_data, IWL_UCODE_REGULAR,
					    tlv_len);
			drv->fw.mvm_fw = true;
			break;
		case IWL_UCODE_TLV_SEC_INIT:
			iwl_store_ucode_sec(pieces, tlv_data, IWL_UCODE_INIT,
					    tlv_len);
			drv->fw.mvm_fw = true;
			break;
		case IWL_UCODE_TLV_SEC_WOWLAN:
			iwl_store_ucode_sec(pieces, tlv_data, IWL_UCODE_WOWLAN,
					    tlv_len);
			drv->fw.mvm_fw = true;
			break;
		case IWL_UCODE_TLV_DEF_CALIB:
			if (tlv_len != sizeof(struct iwl_tlv_calib_data))
				goto invalid_tlv_len;
			if (iwl_set_default_calib(drv, tlv_data))
				goto tlv_error;
			break;
		case IWL_UCODE_TLV_PHY_SKU:
			if (tlv_len != sizeof(u32))
				goto invalid_tlv_len;
			drv->fw.phy_config = le32_to_cpup((__le32 *)tlv_data);
			break;
		default:
			IWL_DEBUG_INFO(drv, "unknown TLV: %d\n", tlv_type);
			break;
		}
	}

	if (len) {
		IWL_ERR(drv, "invalid TLV after parsing: %zd\n", len);
		iwl_print_hex_dump(drv, IWL_DL_FW, (u8 *)data, len);
		return -EINVAL;
	}

	return 0;

 invalid_tlv_len:
	IWL_ERR(drv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
 tlv_error:
	iwl_print_hex_dump(drv, IWL_DL_FW, tlv_data, tlv_len);

	return -EINVAL;
}

static int iwl_alloc_ucode(struct iwl_drv *drv,
			   struct iwl_firmware_pieces *pieces,
			   enum iwl_ucode_type type)
{
	int i;
	for (i = 0;
	     i < IWL_UCODE_SECTION_MAX && get_sec_size(pieces, type, i);
	     i++)
		if (iwl_alloc_fw_desc(drv, &(drv->fw.img[type].sec[i]),
				      get_sec(pieces, type, i)))
			return -ENOMEM;
	return 0;
}

static int validate_sec_sizes(struct iwl_drv *drv,
			      struct iwl_firmware_pieces *pieces,
			      const struct iwl_cfg *cfg)
{
	IWL_DEBUG_INFO(drv, "f/w package hdr runtime inst size = %Zd\n",
		get_sec_size(pieces, IWL_UCODE_REGULAR,
			     IWL_UCODE_SECTION_INST));
	IWL_DEBUG_INFO(drv, "f/w package hdr runtime data size = %Zd\n",
		get_sec_size(pieces, IWL_UCODE_REGULAR,
			     IWL_UCODE_SECTION_DATA));
	IWL_DEBUG_INFO(drv, "f/w package hdr init inst size = %Zd\n",
		get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST));
	IWL_DEBUG_INFO(drv, "f/w package hdr init data size = %Zd\n",
		get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA));

	/* Verify that uCode images will fit in card's SRAM. */
	if (get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_INST) >
							cfg->max_inst_size) {
		IWL_ERR(drv, "uCode instr len %Zd too large to fit in\n",
			get_sec_size(pieces, IWL_UCODE_REGULAR,
						IWL_UCODE_SECTION_INST));
		return -1;
	}

	if (get_sec_size(pieces, IWL_UCODE_REGULAR, IWL_UCODE_SECTION_DATA) >
							cfg->max_data_size) {
		IWL_ERR(drv, "uCode data len %Zd too large to fit in\n",
			get_sec_size(pieces, IWL_UCODE_REGULAR,
						IWL_UCODE_SECTION_DATA));
		return -1;
	}

	 if (get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_INST) >
							cfg->max_inst_size) {
		IWL_ERR(drv, "uCode init instr len %Zd too large to fit in\n",
			get_sec_size(pieces, IWL_UCODE_INIT,
						IWL_UCODE_SECTION_INST));
		return -1;
	}

	if (get_sec_size(pieces, IWL_UCODE_INIT, IWL_UCODE_SECTION_DATA) >
							cfg->max_data_size) {
		IWL_ERR(drv, "uCode init data len %Zd too large to fit in\n",
			get_sec_size(pieces, IWL_UCODE_REGULAR,
						IWL_UCODE_SECTION_DATA));
		return -1;
	}
	return 0;
}

static struct iwl_op_mode *
_iwl_op_mode_start(struct iwl_drv *drv, struct iwlwifi_opmode_table *op)
{
	const struct iwl_op_mode_ops *ops = op->ops;
	struct dentry *dbgfs_dir = NULL;
	struct iwl_op_mode *op_mode = NULL;

#ifdef CONFIG_IWLWIFI_DEBUGFS
	drv->dbgfs_op_mode = debugfs_create_dir(op->name,
						drv->dbgfs_drv);
	if (!drv->dbgfs_op_mode) {
		IWL_ERR(drv,
			"failed to create opmode debugfs directory\n");
		return op_mode;
	}
	dbgfs_dir = drv->dbgfs_op_mode;
#endif

	op_mode = ops->start(drv->trans, drv->cfg, &drv->fw, dbgfs_dir);

#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (!op_mode) {
		debugfs_remove_recursive(drv->dbgfs_op_mode);
		drv->dbgfs_op_mode = NULL;
	}
#endif

	return op_mode;
}

static void _iwl_op_mode_stop(struct iwl_drv *drv)
{
	/* op_mode can be NULL if its start failed */
	if (drv->op_mode) {
		iwl_op_mode_stop(drv->op_mode);
		drv->op_mode = NULL;

#ifdef CONFIG_IWLWIFI_DEBUGFS
		debugfs_remove_recursive(drv->dbgfs_op_mode);
		drv->dbgfs_op_mode = NULL;
#endif
	}
}

/**
 * iwl_req_fw_callback - callback when firmware was loaded
 *
 * If loaded successfully, copies the firmware into buffers
 * for the card to fetch (via DMA).
 */
static void iwl_req_fw_callback(const struct firmware *ucode_raw, void *context)
{
	struct iwl_drv *drv = context;
	struct iwl_fw *fw = &drv->fw;
	struct iwl_ucode_header *ucode;
	struct iwlwifi_opmode_table *op;
	int err;
	struct iwl_firmware_pieces pieces;
	const unsigned int api_max = drv->cfg->ucode_api_max;
	unsigned int api_ok = drv->cfg->ucode_api_ok;
	const unsigned int api_min = drv->cfg->ucode_api_min;
	u32 api_ver;
	int i;
	bool load_module = false;

	fw->ucode_capa.max_probe_length = 200;
	fw->ucode_capa.standard_phy_calibration_size =
			IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;

	if (!api_ok)
		api_ok = api_max;

	memset(&pieces, 0, sizeof(pieces));

	if (!ucode_raw) {
		if (drv->fw_index <= api_ok)
			IWL_ERR(drv,
				"request for firmware file '%s' failed.\n",
				drv->firmware_name);
		goto try_again;
	}

	IWL_DEBUG_INFO(drv, "Loaded firmware file '%s' (%zd bytes).\n",
		       drv->firmware_name, ucode_raw->size);

	/* Make sure that we got at least the API version number */
	if (ucode_raw->size < 4) {
		IWL_ERR(drv, "File size way too small!\n");
		goto try_again;
	}

	/* Data from ucode file:  header followed by uCode images */
	ucode = (struct iwl_ucode_header *)ucode_raw->data;

	if (ucode->ver)
		err = iwl_parse_v1_v2_firmware(drv, ucode_raw, &pieces);
	else
		err = iwl_parse_tlv_firmware(drv, ucode_raw, &pieces,
					   &fw->ucode_capa);

	if (err)
		goto try_again;

	api_ver = IWL_UCODE_API(drv->fw.ucode_ver);

	/*
	 * api_ver should match the api version forming part of the
	 * firmware filename ... but we don't check for that and only rely
	 * on the API version read from firmware header from here on forward
	 */
	/* no api version check required for experimental uCode */
	if (drv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
		if (api_ver < api_min || api_ver > api_max) {
			IWL_ERR(drv,
				"Driver unable to support your firmware API. "
				"Driver supports v%u, firmware is v%u.\n",
				api_max, api_ver);
			goto try_again;
		}

		if (api_ver < api_ok) {
			if (api_ok != api_max)
				IWL_ERR(drv, "Firmware has old API version, "
					"expected v%u through v%u, got v%u.\n",
					api_ok, api_max, api_ver);
			else
				IWL_ERR(drv, "Firmware has old API version, "
					"expected v%u, got v%u.\n",
					api_max, api_ver);
			IWL_ERR(drv, "New firmware can be obtained from "
				      "http://www.intellinuxwireless.org/.\n");
		}
	}

	/*
	 * In mvm uCode there is no difference between data and instructions
	 * sections.
	 */
	if (!fw->mvm_fw && validate_sec_sizes(drv, &pieces, drv->cfg))
		goto try_again;

	/* Allocate ucode buffers for card's bus-master loading ... */

	/* Runtime instructions and 2 copies of data:
	 * 1) unmodified from disk
	 * 2) backup cache for save/restore during power-downs */
	for (i = 0; i < IWL_UCODE_TYPE_MAX; i++)
		if (iwl_alloc_ucode(drv, &pieces, i))
			goto out_free_fw;

	/* Now that we can no longer fail, copy information */

	/*
	 * The (size - 16) / 12 formula is based on the information recorded
	 * for each event, which is of mode 1 (including timestamp) for all
	 * new microcodes that include this information.
	 */
	fw->init_evtlog_ptr = pieces.init_evtlog_ptr;
	if (pieces.init_evtlog_size)
		fw->init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
	else
		fw->init_evtlog_size =
			drv->cfg->base_params->max_event_log_size;
	fw->init_errlog_ptr = pieces.init_errlog_ptr;
	fw->inst_evtlog_ptr = pieces.inst_evtlog_ptr;
	if (pieces.inst_evtlog_size)
		fw->inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
	else
		fw->inst_evtlog_size =
			drv->cfg->base_params->max_event_log_size;
	fw->inst_errlog_ptr = pieces.inst_errlog_ptr;

	/*
	 * figure out the offset of chain noise reset and gain commands
	 * base on the size of standard phy calibration commands table size
	 */
	if (fw->ucode_capa.standard_phy_calibration_size >
	    IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
		fw->ucode_capa.standard_phy_calibration_size =
			IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;

	/* We have our copies now, allow OS release its copies */
	release_firmware(ucode_raw);

	mutex_lock(&iwlwifi_opmode_table_mtx);
	if (fw->mvm_fw)
		op = &iwlwifi_opmode_table[MVM_OP_MODE];
	else
		op = &iwlwifi_opmode_table[DVM_OP_MODE];

	IWL_INFO(drv, "loaded firmware version %s op_mode %s\n",
		 drv->fw.fw_version, op->name);

	/* add this device to the list of devices using this op_mode */
	list_add_tail(&drv->list, &op->drv);

	if (op->ops) {
		drv->op_mode = _iwl_op_mode_start(drv, op);

		if (!drv->op_mode) {
			mutex_unlock(&iwlwifi_opmode_table_mtx);
			goto out_unbind;
		}
	} else {
		load_module = true;
	}
	mutex_unlock(&iwlwifi_opmode_table_mtx);

	/*
	 * Complete the firmware request last so that
	 * a driver unbind (stop) doesn't run while we
	 * are doing the start() above.
	 */
	complete(&drv->request_firmware_complete);

	/*
	 * Load the module last so we don't block anything
	 * else from proceeding if the module fails to load
	 * or hangs loading.
	 */
	if (load_module) {
		err = request_module("%s", op->name);
		if (err)
			IWL_ERR(drv,
				"failed to load module %s (error %d), is dynamic loading enabled?\n",
				op->name, err);
	}
	return;

 try_again:
	/* try next, if any */
	release_firmware(ucode_raw);
	if (iwl_request_firmware(drv, false))
		goto out_unbind;
	return;

 out_free_fw:
	IWL_ERR(drv, "failed to allocate pci memory\n");
	iwl_dealloc_ucode(drv);
	release_firmware(ucode_raw);
 out_unbind:
	complete(&drv->request_firmware_complete);
	device_release_driver(drv->trans->dev);
}

struct iwl_drv *iwl_drv_start(struct iwl_trans *trans,
			      const struct iwl_cfg *cfg)
{
	struct iwl_drv *drv;
	int ret;

	drv = kzalloc(sizeof(*drv), GFP_KERNEL);
	if (!drv)
		return NULL;

	drv->trans = trans;
	drv->dev = trans->dev;
	drv->cfg = cfg;

	init_completion(&drv->request_firmware_complete);
	INIT_LIST_HEAD(&drv->list);

#ifdef CONFIG_IWLWIFI_DEBUGFS
	/* Create the device debugfs entries. */
	drv->dbgfs_drv = debugfs_create_dir(dev_name(trans->dev),
					    iwl_dbgfs_root);

	if (!drv->dbgfs_drv) {
		IWL_ERR(drv, "failed to create debugfs directory\n");
		ret = -ENOMEM;
		goto err_free_drv;
	}

	/* Create transport layer debugfs dir */
	drv->trans->dbgfs_dir = debugfs_create_dir("trans", drv->dbgfs_drv);

	if (!drv->trans->dbgfs_dir) {
		IWL_ERR(drv, "failed to create transport debugfs directory\n");
		ret = -ENOMEM;
		goto err_free_dbgfs;
	}
#endif

	ret = iwl_request_firmware(drv, true);
	if (ret) {
		IWL_ERR(trans, "Couldn't request the fw\n");
		goto err_fw;
	}

	return drv;

err_fw:
#ifdef CONFIG_IWLWIFI_DEBUGFS
err_free_dbgfs:
	debugfs_remove_recursive(drv->dbgfs_drv);
err_free_drv:
#endif
	kfree(drv);

	return ERR_PTR(ret);
}

void iwl_drv_stop(struct iwl_drv *drv)
{
	wait_for_completion(&drv->request_firmware_complete);

	_iwl_op_mode_stop(drv);

	iwl_dealloc_ucode(drv);

	mutex_lock(&iwlwifi_opmode_table_mtx);
	/*
	 * List is empty (this item wasn't added)
	 * when firmware loading failed -- in that
	 * case we can't remove it from any list.
	 */
	if (!list_empty(&drv->list))
		list_del(&drv->list);
	mutex_unlock(&iwlwifi_opmode_table_mtx);

#ifdef CONFIG_IWLWIFI_DEBUGFS
	debugfs_remove_recursive(drv->dbgfs_drv);
#endif

	kfree(drv);
}


/* shared module parameters */
struct iwl_mod_params iwlwifi_mod_params = {
	.restart_fw = true,
	.plcp_check = true,
	.bt_coex_active = true,
	.power_level = IWL_POWER_INDEX_1,
	.bt_ch_announce = true,
	.auto_agg = true,
	.wd_disable = true,
	/* the rest are 0 by default */
};
IWL_EXPORT_SYMBOL(iwlwifi_mod_params);

int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops)
{
	int i;
	struct iwl_drv *drv;
	struct iwlwifi_opmode_table *op;

	mutex_lock(&iwlwifi_opmode_table_mtx);
	for (i = 0; i < ARRAY_SIZE(iwlwifi_opmode_table); i++) {
		op = &iwlwifi_opmode_table[i];
		if (strcmp(op->name, name))
			continue;
		op->ops = ops;
		/* TODO: need to handle exceptional case */
		list_for_each_entry(drv, &op->drv, list)
			drv->op_mode = _iwl_op_mode_start(drv, op);

		mutex_unlock(&iwlwifi_opmode_table_mtx);
		return 0;
	}
	mutex_unlock(&iwlwifi_opmode_table_mtx);
	return -EIO;
}
IWL_EXPORT_SYMBOL(iwl_opmode_register);

void iwl_opmode_deregister(const char *name)
{
	int i;
	struct iwl_drv *drv;

	mutex_lock(&iwlwifi_opmode_table_mtx);
	for (i = 0; i < ARRAY_SIZE(iwlwifi_opmode_table); i++) {
		if (strcmp(iwlwifi_opmode_table[i].name, name))
			continue;
		iwlwifi_opmode_table[i].ops = NULL;

		/* call the stop routine for all devices */
		list_for_each_entry(drv, &iwlwifi_opmode_table[i].drv, list)
			_iwl_op_mode_stop(drv);

		mutex_unlock(&iwlwifi_opmode_table_mtx);
		return;
	}
	mutex_unlock(&iwlwifi_opmode_table_mtx);
}
IWL_EXPORT_SYMBOL(iwl_opmode_deregister);

static int __init iwl_drv_init(void)
{
	int i;

	mutex_init(&iwlwifi_opmode_table_mtx);

	for (i = 0; i < ARRAY_SIZE(iwlwifi_opmode_table); i++)
		INIT_LIST_HEAD(&iwlwifi_opmode_table[i].drv);

	pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
	pr_info(DRV_COPYRIGHT "\n");

#ifdef CONFIG_IWLWIFI_DEBUGFS
	/* Create the root of iwlwifi debugfs subsystem. */
	iwl_dbgfs_root = debugfs_create_dir(DRV_NAME, NULL);

	if (!iwl_dbgfs_root)
		return -EFAULT;
#endif

	return iwl_pci_register_driver();
}
module_init(iwl_drv_init);

static void __exit iwl_drv_exit(void)
{
	iwl_pci_unregister_driver();

#ifdef CONFIG_IWLWIFI_DEBUGFS
	debugfs_remove_recursive(iwl_dbgfs_root);
#endif
}
module_exit(iwl_drv_exit);

#ifdef CONFIG_IWLWIFI_DEBUG
module_param_named(debug, iwlwifi_mod_params.debug_level, uint,
		   S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif

module_param_named(swcrypto, iwlwifi_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(11n_disable, iwlwifi_mod_params.disable_11n, uint, S_IRUGO);
MODULE_PARM_DESC(11n_disable,
	"disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
module_param_named(amsdu_size_8K, iwlwifi_mod_params.amsdu_size_8K,
		   int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0)");
module_param_named(fw_restart, iwlwifi_mod_params.restart_fw, bool, S_IRUGO);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error (default true)");

module_param_named(antenna_coupling, iwlwifi_mod_params.ant_coupling,
		   int, S_IRUGO);
MODULE_PARM_DESC(antenna_coupling,
		 "specify antenna coupling in dB (defualt: 0 dB)");

module_param_named(bt_ch_inhibition, iwlwifi_mod_params.bt_ch_announce,
		   bool, S_IRUGO);
MODULE_PARM_DESC(bt_ch_inhibition,
		 "Enable BT channel inhibition (default: enable)");

module_param_named(plcp_check, iwlwifi_mod_params.plcp_check, bool, S_IRUGO);
MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");

module_param_named(wd_disable, iwlwifi_mod_params.wd_disable, int, S_IRUGO);
MODULE_PARM_DESC(wd_disable,
		"Disable stuck queue watchdog timer 0=system default, "
		"1=disable, 2=enable (default: 0)");

/*
 * set bt_coex_active to true, uCode will do kill/defer
 * every time the priority line is asserted (BT is sending signals on the
 * priority line in the PCIx).
 * set bt_coex_active to false, uCode will ignore the BT activity and
 * perform the normal operation
 *
 * User might experience transmit issue on some platform due to WiFi/BT
 * co-exist problem. The possible behaviors are:
 *   Able to scan and finding all the available AP
 *   Not able to associate with any AP
 * On those platforms, WiFi communication can be restored by set
 * "bt_coex_active" module parameter to "false"
 *
 * default: bt_coex_active = true (BT_COEX_ENABLE)
 */
module_param_named(bt_coex_active, iwlwifi_mod_params.bt_coex_active,
		bool, S_IRUGO);
MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");

module_param_named(led_mode, iwlwifi_mod_params.led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "0=system default, "
		"1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");

module_param_named(power_save, iwlwifi_mod_params.power_save,
		bool, S_IRUGO);
MODULE_PARM_DESC(power_save,
		 "enable WiFi power management (default: disable)");

module_param_named(power_level, iwlwifi_mod_params.power_level,
		int, S_IRUGO);
MODULE_PARM_DESC(power_level,
		 "default power save level (range from 1 - 5, default: 1)");

module_param_named(auto_agg, iwlwifi_mod_params.auto_agg,
		bool, S_IRUGO);
MODULE_PARM_DESC(auto_agg,
		 "enable agg w/o check traffic load (default: enable)");