summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-eeprom-parse.c
blob: 41ff85de73343b0a5686bfd175164807e8dc4684 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
/******************************************************************************
 *
 * 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) 2008 - 2014 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 - 2014 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/types.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "iwl-eeprom-parse.h"

/* EEPROM offset definitions */

/* indirect access definitions */
#define ADDRESS_MSK                 0x0000FFFF
#define INDIRECT_TYPE_MSK           0x000F0000
#define INDIRECT_HOST               0x00010000
#define INDIRECT_GENERAL            0x00020000
#define INDIRECT_REGULATORY         0x00030000
#define INDIRECT_CALIBRATION        0x00040000
#define INDIRECT_PROCESS_ADJST      0x00050000
#define INDIRECT_OTHERS             0x00060000
#define INDIRECT_TXP_LIMIT          0x00070000
#define INDIRECT_TXP_LIMIT_SIZE     0x00080000
#define INDIRECT_ADDRESS            0x00100000

/* corresponding link offsets in EEPROM */
#define EEPROM_LINK_HOST             (2*0x64)
#define EEPROM_LINK_GENERAL          (2*0x65)
#define EEPROM_LINK_REGULATORY       (2*0x66)
#define EEPROM_LINK_CALIBRATION      (2*0x67)
#define EEPROM_LINK_PROCESS_ADJST    (2*0x68)
#define EEPROM_LINK_OTHERS           (2*0x69)
#define EEPROM_LINK_TXP_LIMIT        (2*0x6a)
#define EEPROM_LINK_TXP_LIMIT_SIZE   (2*0x6b)

/* General */
#define EEPROM_DEVICE_ID                    (2*0x08)	/* 2 bytes */
#define EEPROM_SUBSYSTEM_ID		    (2*0x0A)	/* 2 bytes */
#define EEPROM_MAC_ADDRESS                  (2*0x15)	/* 6  bytes */
#define EEPROM_BOARD_REVISION               (2*0x35)	/* 2  bytes */
#define EEPROM_BOARD_PBA_NUMBER             (2*0x3B+1)	/* 9  bytes */
#define EEPROM_VERSION                      (2*0x44)	/* 2  bytes */
#define EEPROM_SKU_CAP                      (2*0x45)	/* 2  bytes */
#define EEPROM_OEM_MODE                     (2*0x46)	/* 2  bytes */
#define EEPROM_RADIO_CONFIG                 (2*0x48)	/* 2  bytes */
#define EEPROM_NUM_MAC_ADDRESS              (2*0x4C)	/* 2  bytes */

/* calibration */
struct iwl_eeprom_calib_hdr {
	u8 version;
	u8 pa_type;
	__le16 voltage;
} __packed;

#define EEPROM_CALIB_ALL	(INDIRECT_ADDRESS | INDIRECT_CALIBRATION)
#define EEPROM_XTAL		((2*0x128) | EEPROM_CALIB_ALL)

/* temperature */
#define EEPROM_KELVIN_TEMPERATURE	((2*0x12A) | EEPROM_CALIB_ALL)
#define EEPROM_RAW_TEMPERATURE		((2*0x12B) | EEPROM_CALIB_ALL)

/* SKU Capabilities (actual values from EEPROM definition) */
enum eeprom_sku_bits {
	EEPROM_SKU_CAP_BAND_24GHZ	= BIT(4),
	EEPROM_SKU_CAP_BAND_52GHZ	= BIT(5),
	EEPROM_SKU_CAP_11N_ENABLE	= BIT(6),
	EEPROM_SKU_CAP_AMT_ENABLE	= BIT(7),
	EEPROM_SKU_CAP_IPAN_ENABLE	= BIT(8)
};

/* radio config bits (actual values from EEPROM definition) */
#define EEPROM_RF_CFG_TYPE_MSK(x)   (x & 0x3)         /* bits 0-1   */
#define EEPROM_RF_CFG_STEP_MSK(x)   ((x >> 2)  & 0x3) /* bits 2-3   */
#define EEPROM_RF_CFG_DASH_MSK(x)   ((x >> 4)  & 0x3) /* bits 4-5   */
#define EEPROM_RF_CFG_PNUM_MSK(x)   ((x >> 6)  & 0x3) /* bits 6-7   */
#define EEPROM_RF_CFG_TX_ANT_MSK(x) ((x >> 8)  & 0xF) /* bits 8-11  */
#define EEPROM_RF_CFG_RX_ANT_MSK(x) ((x >> 12) & 0xF) /* bits 12-15 */


/*
 * EEPROM bands
 * These are the channel numbers from each band in the order
 * that they are stored in the EEPROM band information. Note
 * that EEPROM bands aren't the same as mac80211 bands, and
 * there are even special "ht40 bands" in the EEPROM.
 */
static const u8 iwl_eeprom_band_1[14] = { /* 2.4 GHz */
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};

static const u8 iwl_eeprom_band_2[] = {	/* 4915-5080MHz */
	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};

static const u8 iwl_eeprom_band_3[] = {	/* 5170-5320MHz */
	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};

static const u8 iwl_eeprom_band_4[] = {	/* 5500-5700MHz */
	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};

static const u8 iwl_eeprom_band_5[] = {	/* 5725-5825MHz */
	145, 149, 153, 157, 161, 165
};

static const u8 iwl_eeprom_band_6[] = {	/* 2.4 ht40 channel */
	1, 2, 3, 4, 5, 6, 7
};

static const u8 iwl_eeprom_band_7[] = {	/* 5.2 ht40 channel */
	36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
};

#define IWL_NUM_CHANNELS	(ARRAY_SIZE(iwl_eeprom_band_1) + \
				 ARRAY_SIZE(iwl_eeprom_band_2) + \
				 ARRAY_SIZE(iwl_eeprom_band_3) + \
				 ARRAY_SIZE(iwl_eeprom_band_4) + \
				 ARRAY_SIZE(iwl_eeprom_band_5))

/* rate data (static) */
static struct ieee80211_rate iwl_cfg80211_rates[] = {
	{ .bitrate = 1 * 10, .hw_value = 0, .hw_value_short = 0, },
	{ .bitrate = 2 * 10, .hw_value = 1, .hw_value_short = 1,
	  .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
	{ .bitrate = 5.5 * 10, .hw_value = 2, .hw_value_short = 2,
	  .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
	{ .bitrate = 11 * 10, .hw_value = 3, .hw_value_short = 3,
	  .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
	{ .bitrate = 6 * 10, .hw_value = 4, .hw_value_short = 4, },
	{ .bitrate = 9 * 10, .hw_value = 5, .hw_value_short = 5, },
	{ .bitrate = 12 * 10, .hw_value = 6, .hw_value_short = 6, },
	{ .bitrate = 18 * 10, .hw_value = 7, .hw_value_short = 7, },
	{ .bitrate = 24 * 10, .hw_value = 8, .hw_value_short = 8, },
	{ .bitrate = 36 * 10, .hw_value = 9, .hw_value_short = 9, },
	{ .bitrate = 48 * 10, .hw_value = 10, .hw_value_short = 10, },
	{ .bitrate = 54 * 10, .hw_value = 11, .hw_value_short = 11, },
};
#define RATES_24_OFFS	0
#define N_RATES_24	ARRAY_SIZE(iwl_cfg80211_rates)
#define RATES_52_OFFS	4
#define N_RATES_52	(N_RATES_24 - RATES_52_OFFS)

/* EEPROM reading functions */

static u16 iwl_eeprom_query16(const u8 *eeprom, size_t eeprom_size, int offset)
{
	if (WARN_ON(offset + sizeof(u16) > eeprom_size))
		return 0;
	return le16_to_cpup((__le16 *)(eeprom + offset));
}

static u32 eeprom_indirect_address(const u8 *eeprom, size_t eeprom_size,
				   u32 address)
{
	u16 offset = 0;

	if ((address & INDIRECT_ADDRESS) == 0)
		return address;

	switch (address & INDIRECT_TYPE_MSK) {
	case INDIRECT_HOST:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_HOST);
		break;
	case INDIRECT_GENERAL:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_GENERAL);
		break;
	case INDIRECT_REGULATORY:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_REGULATORY);
		break;
	case INDIRECT_TXP_LIMIT:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_TXP_LIMIT);
		break;
	case INDIRECT_TXP_LIMIT_SIZE:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_TXP_LIMIT_SIZE);
		break;
	case INDIRECT_CALIBRATION:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_CALIBRATION);
		break;
	case INDIRECT_PROCESS_ADJST:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_PROCESS_ADJST);
		break;
	case INDIRECT_OTHERS:
		offset = iwl_eeprom_query16(eeprom, eeprom_size,
					    EEPROM_LINK_OTHERS);
		break;
	default:
		WARN_ON(1);
		break;
	}

	/* translate the offset from words to byte */
	return (address & ADDRESS_MSK) + (offset << 1);
}

static const u8 *iwl_eeprom_query_addr(const u8 *eeprom, size_t eeprom_size,
				       u32 offset)
{
	u32 address = eeprom_indirect_address(eeprom, eeprom_size, offset);

	if (WARN_ON(address >= eeprom_size))
		return NULL;

	return &eeprom[address];
}

static int iwl_eeprom_read_calib(const u8 *eeprom, size_t eeprom_size,
				 struct iwl_nvm_data *data)
{
	struct iwl_eeprom_calib_hdr *hdr;

	hdr = (void *)iwl_eeprom_query_addr(eeprom, eeprom_size,
					    EEPROM_CALIB_ALL);
	if (!hdr)
		return -ENODATA;
	data->calib_version = hdr->version;
	data->calib_voltage = hdr->voltage;

	return 0;
}

/**
 * enum iwl_eeprom_channel_flags - channel flags in EEPROM
 * @EEPROM_CHANNEL_VALID: channel is usable for this SKU/geo
 * @EEPROM_CHANNEL_IBSS: usable as an IBSS channel
 * @EEPROM_CHANNEL_ACTIVE: active scanning allowed
 * @EEPROM_CHANNEL_RADAR: radar detection required
 * @EEPROM_CHANNEL_WIDE: 20 MHz channel okay (?)
 * @EEPROM_CHANNEL_DFS: dynamic freq selection candidate
 */
enum iwl_eeprom_channel_flags {
	EEPROM_CHANNEL_VALID = BIT(0),
	EEPROM_CHANNEL_IBSS = BIT(1),
	EEPROM_CHANNEL_ACTIVE = BIT(3),
	EEPROM_CHANNEL_RADAR = BIT(4),
	EEPROM_CHANNEL_WIDE = BIT(5),
	EEPROM_CHANNEL_DFS = BIT(7),
};

/**
 * struct iwl_eeprom_channel - EEPROM channel data
 * @flags: %EEPROM_CHANNEL_* flags
 * @max_power_avg: max power (in dBm) on this channel, at most 31 dBm
 */
struct iwl_eeprom_channel {
	u8 flags;
	s8 max_power_avg;
} __packed;


enum iwl_eeprom_enhanced_txpwr_flags {
	IWL_EEPROM_ENH_TXP_FL_VALID = BIT(0),
	IWL_EEPROM_ENH_TXP_FL_BAND_52G = BIT(1),
	IWL_EEPROM_ENH_TXP_FL_OFDM = BIT(2),
	IWL_EEPROM_ENH_TXP_FL_40MHZ = BIT(3),
	IWL_EEPROM_ENH_TXP_FL_HT_AP = BIT(4),
	IWL_EEPROM_ENH_TXP_FL_RES1 = BIT(5),
	IWL_EEPROM_ENH_TXP_FL_RES2 = BIT(6),
	IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE = BIT(7),
};

/**
 * iwl_eeprom_enhanced_txpwr structure
 * @flags: entry flags
 * @channel: channel number
 * @chain_a_max_pwr: chain a max power in 1/2 dBm
 * @chain_b_max_pwr: chain b max power in 1/2 dBm
 * @chain_c_max_pwr: chain c max power in 1/2 dBm
 * @delta_20_in_40: 20-in-40 deltas (hi/lo)
 * @mimo2_max_pwr: mimo2 max power in 1/2 dBm
 * @mimo3_max_pwr: mimo3 max power in 1/2 dBm
 *
 * This structure presents the enhanced regulatory tx power limit layout
 * in an EEPROM image.
 */
struct iwl_eeprom_enhanced_txpwr {
	u8 flags;
	u8 channel;
	s8 chain_a_max;
	s8 chain_b_max;
	s8 chain_c_max;
	u8 delta_20_in_40;
	s8 mimo2_max;
	s8 mimo3_max;
} __packed;

static s8 iwl_get_max_txpwr_half_dbm(const struct iwl_nvm_data *data,
				     struct iwl_eeprom_enhanced_txpwr *txp)
{
	s8 result = 0; /* (.5 dBm) */

	/* Take the highest tx power from any valid chains */
	if (data->valid_tx_ant & ANT_A && txp->chain_a_max > result)
		result = txp->chain_a_max;

	if (data->valid_tx_ant & ANT_B && txp->chain_b_max > result)
		result = txp->chain_b_max;

	if (data->valid_tx_ant & ANT_C && txp->chain_c_max > result)
		result = txp->chain_c_max;

	if ((data->valid_tx_ant == ANT_AB ||
	     data->valid_tx_ant == ANT_BC ||
	     data->valid_tx_ant == ANT_AC) && txp->mimo2_max > result)
		result = txp->mimo2_max;

	if (data->valid_tx_ant == ANT_ABC && txp->mimo3_max > result)
		result = txp->mimo3_max;

	return result;
}

#define EEPROM_TXP_OFFS	(0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)

#define TXP_CHECK_AND_PRINT(x) \
	((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) ? # x " " : "")

static void
iwl_eeprom_enh_txp_read_element(struct iwl_nvm_data *data,
				struct iwl_eeprom_enhanced_txpwr *txp,
				int n_channels, s8 max_txpower_avg)
{
	int ch_idx;
	enum ieee80211_band band;

	band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
		IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;

	for (ch_idx = 0; ch_idx < n_channels; ch_idx++) {
		struct ieee80211_channel *chan = &data->channels[ch_idx];

		/* update matching channel or from common data only */
		if (txp->channel != 0 && chan->hw_value != txp->channel)
			continue;

		/* update matching band only */
		if (band != chan->band)
			continue;

		if (chan->max_power < max_txpower_avg &&
		    !(txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ))
			chan->max_power = max_txpower_avg;
	}
}

static void iwl_eeprom_enhanced_txpower(struct device *dev,
					struct iwl_nvm_data *data,
					const u8 *eeprom, size_t eeprom_size,
					int n_channels)
{
	struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
	int idx, entries;
	__le16 *txp_len;
	s8 max_txp_avg_halfdbm;

	BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);

	/* the length is in 16-bit words, but we want entries */
	txp_len = (__le16 *)iwl_eeprom_query_addr(eeprom, eeprom_size,
						  EEPROM_TXP_SZ_OFFS);
	entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;

	txp_array = (void *)iwl_eeprom_query_addr(eeprom, eeprom_size,
						  EEPROM_TXP_OFFS);

	for (idx = 0; idx < entries; idx++) {
		txp = &txp_array[idx];
		/* skip invalid entries */
		if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
			continue;

		IWL_DEBUG_EEPROM(dev, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n",
				 (txp->channel && (txp->flags &
					IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ?
					"Common " : (txp->channel) ?
					"Channel" : "Common",
				 (txp->channel),
				 TXP_CHECK_AND_PRINT(VALID),
				 TXP_CHECK_AND_PRINT(BAND_52G),
				 TXP_CHECK_AND_PRINT(OFDM),
				 TXP_CHECK_AND_PRINT(40MHZ),
				 TXP_CHECK_AND_PRINT(HT_AP),
				 TXP_CHECK_AND_PRINT(RES1),
				 TXP_CHECK_AND_PRINT(RES2),
				 TXP_CHECK_AND_PRINT(COMMON_TYPE),
				 txp->flags);
		IWL_DEBUG_EEPROM(dev,
				 "\t\t chain_A: 0x%02x chain_B: 0X%02x chain_C: 0X%02x\n",
				 txp->chain_a_max, txp->chain_b_max,
				 txp->chain_c_max);
		IWL_DEBUG_EEPROM(dev,
				 "\t\t MIMO2: 0x%02x MIMO3: 0x%02x High 20_on_40: 0x%02x Low 20_on_40: 0x%02x\n",
				 txp->mimo2_max, txp->mimo3_max,
				 ((txp->delta_20_in_40 & 0xf0) >> 4),
				 (txp->delta_20_in_40 & 0x0f));

		max_txp_avg_halfdbm = iwl_get_max_txpwr_half_dbm(data, txp);

		iwl_eeprom_enh_txp_read_element(data, txp, n_channels,
				DIV_ROUND_UP(max_txp_avg_halfdbm, 2));

		if (max_txp_avg_halfdbm > data->max_tx_pwr_half_dbm)
			data->max_tx_pwr_half_dbm = max_txp_avg_halfdbm;
	}
}

static void iwl_init_band_reference(const struct iwl_cfg *cfg,
				    const u8 *eeprom, size_t eeprom_size,
				    int eeprom_band, int *eeprom_ch_count,
				    const struct iwl_eeprom_channel **ch_info,
				    const u8 **eeprom_ch_array)
{
	u32 offset = cfg->eeprom_params->regulatory_bands[eeprom_band - 1];

	offset |= INDIRECT_ADDRESS | INDIRECT_REGULATORY;

	*ch_info = (void *)iwl_eeprom_query_addr(eeprom, eeprom_size, offset);

	switch (eeprom_band) {
	case 1:		/* 2.4GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
		*eeprom_ch_array = iwl_eeprom_band_1;
		break;
	case 2:		/* 4.9GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
		*eeprom_ch_array = iwl_eeprom_band_2;
		break;
	case 3:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
		*eeprom_ch_array = iwl_eeprom_band_3;
		break;
	case 4:		/* 5.5GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
		*eeprom_ch_array = iwl_eeprom_band_4;
		break;
	case 5:		/* 5.7GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
		*eeprom_ch_array = iwl_eeprom_band_5;
		break;
	case 6:		/* 2.4GHz ht40 channels */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
		*eeprom_ch_array = iwl_eeprom_band_6;
		break;
	case 7:		/* 5 GHz ht40 channels */
		*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
		*eeprom_ch_array = iwl_eeprom_band_7;
		break;
	default:
		*eeprom_ch_count = 0;
		*eeprom_ch_array = NULL;
		WARN_ON(1);
	}
}

#define CHECK_AND_PRINT(x) \
	((eeprom_ch->flags & EEPROM_CHANNEL_##x) ? # x " " : "")

static void iwl_mod_ht40_chan_info(struct device *dev,
				   struct iwl_nvm_data *data, int n_channels,
				   enum ieee80211_band band, u16 channel,
				   const struct iwl_eeprom_channel *eeprom_ch,
				   u8 clear_ht40_extension_channel)
{
	struct ieee80211_channel *chan = NULL;
	int i;

	for (i = 0; i < n_channels; i++) {
		if (data->channels[i].band != band)
			continue;
		if (data->channels[i].hw_value != channel)
			continue;
		chan = &data->channels[i];
		break;
	}

	if (!chan)
		return;

	IWL_DEBUG_EEPROM(dev,
			 "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm): Ad-Hoc %ssupported\n",
			 channel,
			 band == IEEE80211_BAND_5GHZ ? "5.2" : "2.4",
			 CHECK_AND_PRINT(IBSS),
			 CHECK_AND_PRINT(ACTIVE),
			 CHECK_AND_PRINT(RADAR),
			 CHECK_AND_PRINT(WIDE),
			 CHECK_AND_PRINT(DFS),
			 eeprom_ch->flags,
			 eeprom_ch->max_power_avg,
			 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
			  !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? ""
								      : "not ");

	if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
		chan->flags &= ~clear_ht40_extension_channel;
}

#define CHECK_AND_PRINT_I(x)	\
	((eeprom_ch_info[ch_idx].flags & EEPROM_CHANNEL_##x) ? # x " " : "")

static int iwl_init_channel_map(struct device *dev, const struct iwl_cfg *cfg,
				struct iwl_nvm_data *data,
				const u8 *eeprom, size_t eeprom_size)
{
	int band, ch_idx;
	const struct iwl_eeprom_channel *eeprom_ch_info;
	const u8 *eeprom_ch_array;
	int eeprom_ch_count;
	int n_channels = 0;

	/*
	 * Loop through the 5 EEPROM bands and add them to the parse list
	 */
	for (band = 1; band <= 5; band++) {
		struct ieee80211_channel *channel;

		iwl_init_band_reference(cfg, eeprom, eeprom_size, band,
					&eeprom_ch_count, &eeprom_ch_info,
					&eeprom_ch_array);

		/* Loop through each band adding each of the channels */
		for (ch_idx = 0; ch_idx < eeprom_ch_count; ch_idx++) {
			const struct iwl_eeprom_channel *eeprom_ch;

			eeprom_ch = &eeprom_ch_info[ch_idx];

			if (!(eeprom_ch->flags & EEPROM_CHANNEL_VALID)) {
				IWL_DEBUG_EEPROM(dev,
						 "Ch. %d Flags %x [%sGHz] - No traffic\n",
						 eeprom_ch_array[ch_idx],
						 eeprom_ch_info[ch_idx].flags,
						 (band != 1) ? "5.2" : "2.4");
				continue;
			}

			channel = &data->channels[n_channels];
			n_channels++;

			channel->hw_value = eeprom_ch_array[ch_idx];
			channel->band = (band == 1) ? IEEE80211_BAND_2GHZ
						    : IEEE80211_BAND_5GHZ;
			channel->center_freq =
				ieee80211_channel_to_frequency(
					channel->hw_value, channel->band);

			/* set no-HT40, will enable as appropriate later */
			channel->flags = IEEE80211_CHAN_NO_HT40;

			if (!(eeprom_ch->flags & EEPROM_CHANNEL_IBSS))
				channel->flags |= IEEE80211_CHAN_NO_IR;

			if (!(eeprom_ch->flags & EEPROM_CHANNEL_ACTIVE))
				channel->flags |= IEEE80211_CHAN_NO_IR;

			if (eeprom_ch->flags & EEPROM_CHANNEL_RADAR)
				channel->flags |= IEEE80211_CHAN_RADAR;

			/* Initialize regulatory-based run-time data */
			channel->max_power =
				eeprom_ch_info[ch_idx].max_power_avg;
			IWL_DEBUG_EEPROM(dev,
					 "Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm): Ad-Hoc %ssupported\n",
					 channel->hw_value,
					 (band != 1) ? "5.2" : "2.4",
					 CHECK_AND_PRINT_I(VALID),
					 CHECK_AND_PRINT_I(IBSS),
					 CHECK_AND_PRINT_I(ACTIVE),
					 CHECK_AND_PRINT_I(RADAR),
					 CHECK_AND_PRINT_I(WIDE),
					 CHECK_AND_PRINT_I(DFS),
					 eeprom_ch_info[ch_idx].flags,
					 eeprom_ch_info[ch_idx].max_power_avg,
					 ((eeprom_ch_info[ch_idx].flags &
							EEPROM_CHANNEL_IBSS) &&
					  !(eeprom_ch_info[ch_idx].flags &
							EEPROM_CHANNEL_RADAR))
						? "" : "not ");
		}
	}

	if (cfg->eeprom_params->enhanced_txpower) {
		/*
		 * for newer device (6000 series and up)
		 * EEPROM contain enhanced tx power information
		 * driver need to process addition information
		 * to determine the max channel tx power limits
		 */
		iwl_eeprom_enhanced_txpower(dev, data, eeprom, eeprom_size,
					    n_channels);
	} else {
		/* All others use data from channel map */
		int i;

		data->max_tx_pwr_half_dbm = -128;

		for (i = 0; i < n_channels; i++)
			data->max_tx_pwr_half_dbm =
				max_t(s8, data->max_tx_pwr_half_dbm,
				      data->channels[i].max_power * 2);
	}

	/* Check if we do have HT40 channels */
	if (cfg->eeprom_params->regulatory_bands[5] ==
				EEPROM_REGULATORY_BAND_NO_HT40 &&
	    cfg->eeprom_params->regulatory_bands[6] ==
				EEPROM_REGULATORY_BAND_NO_HT40)
		return n_channels;

	/* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
	for (band = 6; band <= 7; band++) {
		enum ieee80211_band ieeeband;

		iwl_init_band_reference(cfg, eeprom, eeprom_size, band,
					&eeprom_ch_count, &eeprom_ch_info,
					&eeprom_ch_array);

		/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
		ieeeband = (band == 6) ? IEEE80211_BAND_2GHZ
				       : IEEE80211_BAND_5GHZ;

		/* Loop through each band adding each of the channels */
		for (ch_idx = 0; ch_idx < eeprom_ch_count; ch_idx++) {
			/* Set up driver's info for lower half */
			iwl_mod_ht40_chan_info(dev, data, n_channels, ieeeband,
					       eeprom_ch_array[ch_idx],
					       &eeprom_ch_info[ch_idx],
					       IEEE80211_CHAN_NO_HT40PLUS);

			/* Set up driver's info for upper half */
			iwl_mod_ht40_chan_info(dev, data, n_channels, ieeeband,
					       eeprom_ch_array[ch_idx] + 4,
					       &eeprom_ch_info[ch_idx],
					       IEEE80211_CHAN_NO_HT40MINUS);
		}
	}

	return n_channels;
}

int iwl_init_sband_channels(struct iwl_nvm_data *data,
			    struct ieee80211_supported_band *sband,
			    int n_channels, enum ieee80211_band band)
{
	struct ieee80211_channel *chan = &data->channels[0];
	int n = 0, idx = 0;

	while (chan->band != band && idx < n_channels)
		chan = &data->channels[++idx];

	sband->channels = &data->channels[idx];

	while (chan->band == band && idx < n_channels) {
		chan = &data->channels[++idx];
		n++;
	}

	sband->n_channels = n;

	return n;
}

#define MAX_BIT_RATE_40_MHZ	150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ	72 /* Mbps */

void iwl_init_ht_hw_capab(const struct iwl_cfg *cfg,
			  struct iwl_nvm_data *data,
			  struct ieee80211_sta_ht_cap *ht_info,
			  enum ieee80211_band band,
			  u8 tx_chains, u8 rx_chains)
{
	int max_bit_rate = 0;

	tx_chains = hweight8(tx_chains);
	if (cfg->rx_with_siso_diversity)
		rx_chains = 1;
	else
		rx_chains = hweight8(rx_chains);

	if (!(data->sku_cap_11n_enable) || !cfg->ht_params) {
		ht_info->ht_supported = false;
		return;
	}

	ht_info->ht_supported = true;
	ht_info->cap = IEEE80211_HT_CAP_DSSSCCK40;

	if (cfg->ht_params->stbc) {
		ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);

		if (tx_chains > 1)
			ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
	}

	if (cfg->ht_params->ldpc)
		ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;

	if (iwlwifi_mod_params.amsdu_size_8K)
		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;

	ht_info->ampdu_factor = cfg->max_ht_ampdu_exponent;
	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;

	ht_info->mcs.rx_mask[0] = 0xFF;
	if (rx_chains >= 2)
		ht_info->mcs.rx_mask[1] = 0xFF;
	if (rx_chains >= 3)
		ht_info->mcs.rx_mask[2] = 0xFF;

	if (cfg->ht_params->ht_greenfield_support)
		ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
	ht_info->cap |= IEEE80211_HT_CAP_SGI_20;

	max_bit_rate = MAX_BIT_RATE_20_MHZ;

	if (cfg->ht_params->ht40_bands & BIT(band)) {
		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
		max_bit_rate = MAX_BIT_RATE_40_MHZ;
	}

	/* Highest supported Rx data rate */
	max_bit_rate *= rx_chains;
	WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
	ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);

	/* Tx MCS capabilities */
	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
	if (tx_chains != rx_chains) {
		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
		ht_info->mcs.tx_params |= ((tx_chains - 1) <<
				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
	}
}

static void iwl_init_sbands(struct device *dev, const struct iwl_cfg *cfg,
			    struct iwl_nvm_data *data,
			    const u8 *eeprom, size_t eeprom_size)
{
	int n_channels = iwl_init_channel_map(dev, cfg, data,
					      eeprom, eeprom_size);
	int n_used = 0;
	struct ieee80211_supported_band *sband;

	sband = &data->bands[IEEE80211_BAND_2GHZ];
	sband->band = IEEE80211_BAND_2GHZ;
	sband->bitrates = &iwl_cfg80211_rates[RATES_24_OFFS];
	sband->n_bitrates = N_RATES_24;
	n_used += iwl_init_sband_channels(data, sband, n_channels,
					  IEEE80211_BAND_2GHZ);
	iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_2GHZ,
			     data->valid_tx_ant, data->valid_rx_ant);

	sband = &data->bands[IEEE80211_BAND_5GHZ];
	sband->band = IEEE80211_BAND_5GHZ;
	sband->bitrates = &iwl_cfg80211_rates[RATES_52_OFFS];
	sband->n_bitrates = N_RATES_52;
	n_used += iwl_init_sband_channels(data, sband, n_channels,
					  IEEE80211_BAND_5GHZ);
	iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_5GHZ,
			     data->valid_tx_ant, data->valid_rx_ant);

	if (n_channels != n_used)
		IWL_ERR_DEV(dev, "EEPROM: used only %d of %d channels\n",
			    n_used, n_channels);
}

/* EEPROM data functions */

struct iwl_nvm_data *
iwl_parse_eeprom_data(struct device *dev, const struct iwl_cfg *cfg,
		      const u8 *eeprom, size_t eeprom_size)
{
	struct iwl_nvm_data *data;
	const void *tmp;
	u16 radio_cfg, sku;

	if (WARN_ON(!cfg || !cfg->eeprom_params))
		return NULL;

	data = kzalloc(sizeof(*data) +
		       sizeof(struct ieee80211_channel) * IWL_NUM_CHANNELS,
		       GFP_KERNEL);
	if (!data)
		return NULL;

	/* get MAC address(es) */
	tmp = iwl_eeprom_query_addr(eeprom, eeprom_size, EEPROM_MAC_ADDRESS);
	if (!tmp)
		goto err_free;
	memcpy(data->hw_addr, tmp, ETH_ALEN);
	data->n_hw_addrs = iwl_eeprom_query16(eeprom, eeprom_size,
					      EEPROM_NUM_MAC_ADDRESS);

	if (iwl_eeprom_read_calib(eeprom, eeprom_size, data))
		goto err_free;

	tmp = iwl_eeprom_query_addr(eeprom, eeprom_size, EEPROM_XTAL);
	if (!tmp)
		goto err_free;
	memcpy(data->xtal_calib, tmp, sizeof(data->xtal_calib));

	tmp = iwl_eeprom_query_addr(eeprom, eeprom_size,
				    EEPROM_RAW_TEMPERATURE);
	if (!tmp)
		goto err_free;
	data->raw_temperature = *(__le16 *)tmp;

	tmp = iwl_eeprom_query_addr(eeprom, eeprom_size,
				    EEPROM_KELVIN_TEMPERATURE);
	if (!tmp)
		goto err_free;
	data->kelvin_temperature = *(__le16 *)tmp;
	data->kelvin_voltage = *((__le16 *)tmp + 1);

	radio_cfg = iwl_eeprom_query16(eeprom, eeprom_size,
					     EEPROM_RADIO_CONFIG);
	data->radio_cfg_dash = EEPROM_RF_CFG_DASH_MSK(radio_cfg);
	data->radio_cfg_pnum = EEPROM_RF_CFG_PNUM_MSK(radio_cfg);
	data->radio_cfg_step = EEPROM_RF_CFG_STEP_MSK(radio_cfg);
	data->radio_cfg_type = EEPROM_RF_CFG_TYPE_MSK(radio_cfg);
	data->valid_rx_ant = EEPROM_RF_CFG_RX_ANT_MSK(radio_cfg);
	data->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);

	sku = iwl_eeprom_query16(eeprom, eeprom_size,
				 EEPROM_SKU_CAP);
	data->sku_cap_11n_enable = sku & EEPROM_SKU_CAP_11N_ENABLE;
	data->sku_cap_amt_enable = sku & EEPROM_SKU_CAP_AMT_ENABLE;
	data->sku_cap_band_24GHz_enable = sku & EEPROM_SKU_CAP_BAND_24GHZ;
	data->sku_cap_band_52GHz_enable = sku & EEPROM_SKU_CAP_BAND_52GHZ;
	data->sku_cap_ipan_enable = sku & EEPROM_SKU_CAP_IPAN_ENABLE;
	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
		data->sku_cap_11n_enable = false;

	data->nvm_version = iwl_eeprom_query16(eeprom, eeprom_size,
					       EEPROM_VERSION);

	/* check overrides (some devices have wrong EEPROM) */
	if (cfg->valid_tx_ant)
		data->valid_tx_ant = cfg->valid_tx_ant;
	if (cfg->valid_rx_ant)
		data->valid_rx_ant = cfg->valid_rx_ant;

	if (!data->valid_tx_ant || !data->valid_rx_ant) {
		IWL_ERR_DEV(dev, "invalid antennas (0x%x, 0x%x)\n",
			    data->valid_tx_ant, data->valid_rx_ant);
		goto err_free;
	}

	iwl_init_sbands(dev, cfg, data, eeprom, eeprom_size);

	return data;
 err_free:
	kfree(data);
	return NULL;
}
IWL_EXPORT_SYMBOL(iwl_parse_eeprom_data);

/* helper functions */
int iwl_nvm_check_version(struct iwl_nvm_data *data,
			     struct iwl_trans *trans)
{
	if (data->nvm_version >= trans->cfg->nvm_ver ||
	    data->calib_version >= trans->cfg->nvm_calib_ver) {
		IWL_DEBUG_INFO(trans, "device EEPROM VER=0x%x, CALIB=0x%x\n",
			       data->nvm_version, data->calib_version);
		return 0;
	}

	IWL_ERR(trans,
		"Unsupported (too old) EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
		data->nvm_version, trans->cfg->nvm_ver,
		data->calib_version,  trans->cfg->nvm_calib_ver);
	return -EINVAL;
}
IWL_EXPORT_SYMBOL(iwl_nvm_check_version);