summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/brcm80211/brcmfmac/chip.c
blob: c7c9f15c0fe08170ee2f953e9690a13e605a3291 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
/*
 * Copyright (c) 2014 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/ssb/ssb_regs.h>
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_regs.h>

#include <defs.h>
#include <soc.h>
#include <brcm_hw_ids.h>
#include <brcmu_utils.h>
#include <chipcommon.h>
#include "dhd_dbg.h"
#include "chip.h"

/* SOC Interconnect types (aka chip types) */
#define SOCI_SB		0
#define SOCI_AI		1

/* PL-368 DMP definitions */
#define DMP_DESC_TYPE_MSK	0x0000000F
#define  DMP_DESC_EMPTY		0x00000000
#define  DMP_DESC_VALID		0x00000001
#define  DMP_DESC_COMPONENT	0x00000001
#define  DMP_DESC_MASTER_PORT	0x00000003
#define  DMP_DESC_ADDRESS	0x00000005
#define  DMP_DESC_ADDRSIZE_GT32	0x00000008
#define  DMP_DESC_EOT		0x0000000F

#define DMP_COMP_DESIGNER	0xFFF00000
#define DMP_COMP_DESIGNER_S	20
#define DMP_COMP_PARTNUM	0x000FFF00
#define DMP_COMP_PARTNUM_S	8
#define DMP_COMP_CLASS		0x000000F0
#define DMP_COMP_CLASS_S	4
#define DMP_COMP_REVISION	0xFF000000
#define DMP_COMP_REVISION_S	24
#define DMP_COMP_NUM_SWRAP	0x00F80000
#define DMP_COMP_NUM_SWRAP_S	19
#define DMP_COMP_NUM_MWRAP	0x0007C000
#define DMP_COMP_NUM_MWRAP_S	14
#define DMP_COMP_NUM_SPORT	0x00003E00
#define DMP_COMP_NUM_SPORT_S	9
#define DMP_COMP_NUM_MPORT	0x000001F0
#define DMP_COMP_NUM_MPORT_S	4

#define DMP_MASTER_PORT_UID	0x0000FF00
#define DMP_MASTER_PORT_UID_S	8
#define DMP_MASTER_PORT_NUM	0x000000F0
#define DMP_MASTER_PORT_NUM_S	4

#define DMP_SLAVE_ADDR_BASE	0xFFFFF000
#define DMP_SLAVE_ADDR_BASE_S	12
#define DMP_SLAVE_PORT_NUM	0x00000F00
#define DMP_SLAVE_PORT_NUM_S	8
#define DMP_SLAVE_TYPE		0x000000C0
#define DMP_SLAVE_TYPE_S	6
#define  DMP_SLAVE_TYPE_SLAVE	0
#define  DMP_SLAVE_TYPE_BRIDGE	1
#define  DMP_SLAVE_TYPE_SWRAP	2
#define  DMP_SLAVE_TYPE_MWRAP	3
#define DMP_SLAVE_SIZE_TYPE	0x00000030
#define DMP_SLAVE_SIZE_TYPE_S	4
#define  DMP_SLAVE_SIZE_4K	0
#define  DMP_SLAVE_SIZE_8K	1
#define  DMP_SLAVE_SIZE_16K	2
#define  DMP_SLAVE_SIZE_DESC	3

/* EROM CompIdentB */
#define CIB_REV_MASK		0xff000000
#define CIB_REV_SHIFT		24

/* ARM CR4 core specific control flag bits */
#define ARMCR4_BCMA_IOCTL_CPUHALT	0x0020

/* D11 core specific control flag bits */
#define D11_BCMA_IOCTL_PHYCLOCKEN	0x0004
#define D11_BCMA_IOCTL_PHYRESET		0x0008

/* chip core base & ramsize */
/* bcm4329 */
/* SDIO device core, ID 0x829 */
#define BCM4329_CORE_BUS_BASE		0x18011000
/* internal memory core, ID 0x80e */
#define BCM4329_CORE_SOCRAM_BASE	0x18003000
/* ARM Cortex M3 core, ID 0x82a */
#define BCM4329_CORE_ARM_BASE		0x18002000
#define BCM4329_RAMSIZE			0x48000

/* bcm43143 */
/* SDIO device core */
#define BCM43143_CORE_BUS_BASE		0x18002000
/* internal memory core */
#define BCM43143_CORE_SOCRAM_BASE	0x18004000
/* ARM Cortex M3 core, ID 0x82a */
#define BCM43143_CORE_ARM_BASE		0x18003000
#define BCM43143_RAMSIZE		0x70000

#define CORE_SB(base, field) \
		(base + SBCONFIGOFF + offsetof(struct sbconfig, field))
#define	SBCOREREV(sbidh) \
	((((sbidh) & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT) | \
	  ((sbidh) & SSB_IDHIGH_RCLO))

struct sbconfig {
	u32 PAD[2];
	u32 sbipsflag;	/* initiator port ocp slave flag */
	u32 PAD[3];
	u32 sbtpsflag;	/* target port ocp slave flag */
	u32 PAD[11];
	u32 sbtmerrloga;	/* (sonics >= 2.3) */
	u32 PAD;
	u32 sbtmerrlog;	/* (sonics >= 2.3) */
	u32 PAD[3];
	u32 sbadmatch3;	/* address match3 */
	u32 PAD;
	u32 sbadmatch2;	/* address match2 */
	u32 PAD;
	u32 sbadmatch1;	/* address match1 */
	u32 PAD[7];
	u32 sbimstate;	/* initiator agent state */
	u32 sbintvec;	/* interrupt mask */
	u32 sbtmstatelow;	/* target state */
	u32 sbtmstatehigh;	/* target state */
	u32 sbbwa0;		/* bandwidth allocation table0 */
	u32 PAD;
	u32 sbimconfiglow;	/* initiator configuration */
	u32 sbimconfighigh;	/* initiator configuration */
	u32 sbadmatch0;	/* address match0 */
	u32 PAD;
	u32 sbtmconfiglow;	/* target configuration */
	u32 sbtmconfighigh;	/* target configuration */
	u32 sbbconfig;	/* broadcast configuration */
	u32 PAD;
	u32 sbbstate;	/* broadcast state */
	u32 PAD[3];
	u32 sbactcnfg;	/* activate configuration */
	u32 PAD[3];
	u32 sbflagst;	/* current sbflags */
	u32 PAD[3];
	u32 sbidlow;		/* identification */
	u32 sbidhigh;	/* identification */
};

struct brcmf_core_priv {
	struct brcmf_core pub;
	u32 wrapbase;
	struct list_head list;
	struct brcmf_chip_priv *chip;
};

/* ARM CR4 core specific control flag bits */
#define ARMCR4_BCMA_IOCTL_CPUHALT	0x0020

/* D11 core specific control flag bits */
#define D11_BCMA_IOCTL_PHYCLOCKEN	0x0004
#define D11_BCMA_IOCTL_PHYRESET		0x0008

struct brcmf_chip_priv {
	struct brcmf_chip pub;
	const struct brcmf_buscore_ops *ops;
	void *ctx;
	/* assured first core is chipcommon, second core is buscore */
	struct list_head cores;
	u16 num_cores;

	bool (*iscoreup)(struct brcmf_core_priv *core);
	void (*coredisable)(struct brcmf_core_priv *core, u32 prereset,
			    u32 reset);
	void (*resetcore)(struct brcmf_core_priv *core, u32 prereset, u32 reset,
			  u32 postreset);
};

static void brcmf_chip_sb_corerev(struct brcmf_chip_priv *ci,
				  struct brcmf_core *core)
{
	u32 regdata;

	regdata = ci->ops->read32(ci->ctx, CORE_SB(core->base, sbidhigh));
	core->rev = SBCOREREV(regdata);
}

static bool brcmf_chip_sb_iscoreup(struct brcmf_core_priv *core)
{
	struct brcmf_chip_priv *ci;
	u32 regdata;
	u32 address;

	ci = core->chip;
	address = CORE_SB(core->pub.base, sbtmstatelow);
	regdata = ci->ops->read32(ci->ctx, address);
	regdata &= (SSB_TMSLOW_RESET | SSB_TMSLOW_REJECT |
		    SSB_IMSTATE_REJECT | SSB_TMSLOW_CLOCK);
	return SSB_TMSLOW_CLOCK == regdata;
}

static bool brcmf_chip_ai_iscoreup(struct brcmf_core_priv *core)
{
	struct brcmf_chip_priv *ci;
	u32 regdata;
	bool ret;

	ci = core->chip;
	regdata = ci->ops->read32(ci->ctx, core->wrapbase + BCMA_IOCTL);
	ret = (regdata & (BCMA_IOCTL_FGC | BCMA_IOCTL_CLK)) == BCMA_IOCTL_CLK;

	regdata = ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL);
	ret = ret && ((regdata & BCMA_RESET_CTL_RESET) == 0);

	return ret;
}

static void brcmf_chip_sb_coredisable(struct brcmf_core_priv *core,
				      u32 prereset, u32 reset)
{
	struct brcmf_chip_priv *ci;
	u32 val, base;

	ci = core->chip;
	base = core->pub.base;
	val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
	if (val & SSB_TMSLOW_RESET)
		return;

	val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
	if ((val & SSB_TMSLOW_CLOCK) != 0) {
		/*
		 * set target reject and spin until busy is clear
		 * (preserve core-specific bits)
		 */
		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
		ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow),
					 val | SSB_TMSLOW_REJECT);

		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
		udelay(1);
		SPINWAIT((ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatehigh))
			  & SSB_TMSHIGH_BUSY), 100000);

		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatehigh));
		if (val & SSB_TMSHIGH_BUSY)
			brcmf_err("core state still busy\n");

		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbidlow));
		if (val & SSB_IDLOW_INITIATOR) {
			val = ci->ops->read32(ci->ctx,
					      CORE_SB(base, sbimstate));
			val |= SSB_IMSTATE_REJECT;
			ci->ops->write32(ci->ctx,
					 CORE_SB(base, sbimstate), val);
			val = ci->ops->read32(ci->ctx,
					      CORE_SB(base, sbimstate));
			udelay(1);
			SPINWAIT((ci->ops->read32(ci->ctx,
						  CORE_SB(base, sbimstate)) &
				  SSB_IMSTATE_BUSY), 100000);
		}

		/* set reset and reject while enabling the clocks */
		val = SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
		      SSB_TMSLOW_REJECT | SSB_TMSLOW_RESET;
		ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow), val);
		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
		udelay(10);

		/* clear the initiator reject bit */
		val = ci->ops->read32(ci->ctx, CORE_SB(base, sbidlow));
		if (val & SSB_IDLOW_INITIATOR) {
			val = ci->ops->read32(ci->ctx,
					      CORE_SB(base, sbimstate));
			val &= ~SSB_IMSTATE_REJECT;
			ci->ops->write32(ci->ctx,
					 CORE_SB(base, sbimstate), val);
		}
	}

	/* leave reset and reject asserted */
	ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow),
			 (SSB_TMSLOW_REJECT | SSB_TMSLOW_RESET));
	udelay(1);
}

static void brcmf_chip_ai_coredisable(struct brcmf_core_priv *core,
				      u32 prereset, u32 reset)
{
	struct brcmf_chip_priv *ci;
	u32 regdata;

	ci = core->chip;

	/* if core is already in reset, skip reset */
	regdata = ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL);
	if ((regdata & BCMA_RESET_CTL_RESET) != 0)
		goto in_reset_configure;

	/* configure reset */
	ci->ops->write32(ci->ctx, core->wrapbase + BCMA_IOCTL,
			 prereset | BCMA_IOCTL_FGC | BCMA_IOCTL_CLK);
	ci->ops->read32(ci->ctx, core->wrapbase + BCMA_IOCTL);

	/* put in reset */
	ci->ops->write32(ci->ctx, core->wrapbase + BCMA_RESET_CTL,
			 BCMA_RESET_CTL_RESET);
	usleep_range(10, 20);

	/* wait till reset is 1 */
	SPINWAIT(ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL) !=
		 BCMA_RESET_CTL_RESET, 300);

in_reset_configure:
	/* in-reset configure */
	ci->ops->write32(ci->ctx, core->wrapbase + BCMA_IOCTL,
			 reset | BCMA_IOCTL_FGC | BCMA_IOCTL_CLK);
	ci->ops->read32(ci->ctx, core->wrapbase + BCMA_IOCTL);
}

static void brcmf_chip_sb_resetcore(struct brcmf_core_priv *core, u32 prereset,
				    u32 reset, u32 postreset)
{
	struct brcmf_chip_priv *ci;
	u32 regdata;
	u32 base;

	ci = core->chip;
	base = core->pub.base;
	/*
	 * Must do the disable sequence first to work for
	 * arbitrary current core state.
	 */
	brcmf_chip_sb_coredisable(core, 0, 0);

	/*
	 * Now do the initialization sequence.
	 * set reset while enabling the clock and
	 * forcing them on throughout the core
	 */
	ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow),
			 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
			 SSB_TMSLOW_RESET);
	regdata = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
	udelay(1);

	/* clear any serror */
	regdata = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatehigh));
	if (regdata & SSB_TMSHIGH_SERR)
		ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatehigh), 0);

	regdata = ci->ops->read32(ci->ctx, CORE_SB(base, sbimstate));
	if (regdata & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
		regdata &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
		ci->ops->write32(ci->ctx, CORE_SB(base, sbimstate), regdata);
	}

	/* clear reset and allow it to propagate throughout the core */
	ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow),
			 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK);
	regdata = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
	udelay(1);

	/* leave clock enabled */
	ci->ops->write32(ci->ctx, CORE_SB(base, sbtmstatelow),
			 SSB_TMSLOW_CLOCK);
	regdata = ci->ops->read32(ci->ctx, CORE_SB(base, sbtmstatelow));
	udelay(1);
}

static void brcmf_chip_ai_resetcore(struct brcmf_core_priv *core, u32 prereset,
				    u32 reset, u32 postreset)
{
	struct brcmf_chip_priv *ci;
	int count;

	ci = core->chip;

	/* must disable first to work for arbitrary current core state */
	brcmf_chip_ai_coredisable(core, prereset, reset);

	count = 0;
	while (ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL) &
	       BCMA_RESET_CTL_RESET) {
		ci->ops->write32(ci->ctx, core->wrapbase + BCMA_RESET_CTL, 0);
		count++;
		if (count > 50)
			break;
		usleep_range(40, 60);
	}

	ci->ops->write32(ci->ctx, core->wrapbase + BCMA_IOCTL,
			 postreset | BCMA_IOCTL_CLK);
	ci->ops->read32(ci->ctx, core->wrapbase + BCMA_IOCTL);
}

static char *brcmf_chip_name(uint chipid, char *buf, uint len)
{
	const char *fmt;

	fmt = ((chipid > 0xa000) || (chipid < 0x4000)) ? "%d" : "%x";
	snprintf(buf, len, fmt, chipid);
	return buf;
}

static struct brcmf_core *brcmf_chip_add_core(struct brcmf_chip_priv *ci,
					      u16 coreid, u32 base,
					      u32 wrapbase)
{
	struct brcmf_core_priv *core;

	core = kzalloc(sizeof(*core), GFP_KERNEL);
	if (!core)
		return ERR_PTR(-ENOMEM);

	core->pub.id = coreid;
	core->pub.base = base;
	core->chip = ci;
	core->wrapbase = wrapbase;

	list_add_tail(&core->list, &ci->cores);
	return &core->pub;
}

#ifdef DEBUG
/* safety check for chipinfo */
static int brcmf_chip_cores_check(struct brcmf_chip_priv *ci)
{
	struct brcmf_core_priv *core;
	bool need_socram = false;
	bool has_socram = false;
	int idx = 1;

	list_for_each_entry(core, &ci->cores, list) {
		brcmf_dbg(INFO, " [%-2d] core 0x%x:%-2d base 0x%08x wrap 0x%08x\n",
			  idx++, core->pub.id, core->pub.rev, core->pub.base,
			  core->wrapbase);

		switch (core->pub.id) {
		case BCMA_CORE_ARM_CM3:
			need_socram = true;
			break;
		case BCMA_CORE_INTERNAL_MEM:
			has_socram = true;
			break;
		case BCMA_CORE_ARM_CR4:
			if (ci->pub.rambase == 0) {
				brcmf_err("RAM base not provided with ARM CR4 core\n");
				return -ENOMEM;
			}
			break;
		default:
			break;
		}
	}

	/* check RAM core presence for ARM CM3 core */
	if (need_socram && !has_socram) {
		brcmf_err("RAM core not provided with ARM CM3 core\n");
		return -ENODEV;
	}
	return 0;
}
#else	/* DEBUG */
static inline int brcmf_chip_cores_check(struct brcmf_chip_priv *ci)
{
	return 0;
}
#endif

static void brcmf_chip_get_raminfo(struct brcmf_chip_priv *ci)
{
	switch (ci->pub.chip) {
	case BCM4329_CHIP_ID:
		ci->pub.ramsize = BCM4329_RAMSIZE;
		break;
	case BCM43143_CHIP_ID:
		ci->pub.ramsize = BCM43143_RAMSIZE;
		break;
	case BCM43241_CHIP_ID:
		ci->pub.ramsize = 0x90000;
		break;
	case BCM4330_CHIP_ID:
		ci->pub.ramsize = 0x48000;
		break;
	case BCM4334_CHIP_ID:
		ci->pub.ramsize = 0x80000;
		break;
	case BCM4335_CHIP_ID:
		ci->pub.ramsize = 0xc0000;
		ci->pub.rambase = 0x180000;
		break;
	case BCM43362_CHIP_ID:
		ci->pub.ramsize = 0x3c000;
		break;
	case BCM4339_CHIP_ID:
	case BCM4354_CHIP_ID:
		ci->pub.ramsize = 0xc0000;
		ci->pub.rambase = 0x180000;
		break;
	default:
		brcmf_err("unknown chip: %s\n", ci->pub.name);
		break;
	}
}

static u32 brcmf_chip_dmp_get_desc(struct brcmf_chip_priv *ci, u32 *eromaddr,
				   u8 *type)
{
	u32 val;

	/* read next descriptor */
	val = ci->ops->read32(ci->ctx, *eromaddr);
	*eromaddr += 4;

	if (!type)
		return val;

	/* determine descriptor type */
	*type = (val & DMP_DESC_TYPE_MSK);
	if ((*type & ~DMP_DESC_ADDRSIZE_GT32) == DMP_DESC_ADDRESS)
		*type = DMP_DESC_ADDRESS;

	return val;
}

static int brcmf_chip_dmp_get_regaddr(struct brcmf_chip_priv *ci, u32 *eromaddr,
				      u32 *regbase, u32 *wrapbase)
{
	u8 desc;
	u32 val;
	u8 mpnum = 0;
	u8 stype, sztype, wraptype;

	*regbase = 0;
	*wrapbase = 0;

	val = brcmf_chip_dmp_get_desc(ci, eromaddr, &desc);
	if (desc == DMP_DESC_MASTER_PORT) {
		mpnum = (val & DMP_MASTER_PORT_NUM) >> DMP_MASTER_PORT_NUM_S;
		wraptype = DMP_SLAVE_TYPE_MWRAP;
	} else if (desc == DMP_DESC_ADDRESS) {
		/* revert erom address */
		*eromaddr -= 4;
		wraptype = DMP_SLAVE_TYPE_SWRAP;
	} else {
		*eromaddr -= 4;
		return -EILSEQ;
	}

	do {
		/* locate address descriptor */
		do {
			val = brcmf_chip_dmp_get_desc(ci, eromaddr, &desc);
			/* unexpected table end */
			if (desc == DMP_DESC_EOT) {
				*eromaddr -= 4;
				return -EFAULT;
			}
		} while (desc != DMP_DESC_ADDRESS);

		/* skip upper 32-bit address descriptor */
		if (val & DMP_DESC_ADDRSIZE_GT32)
			brcmf_chip_dmp_get_desc(ci, eromaddr, NULL);

		sztype = (val & DMP_SLAVE_SIZE_TYPE) >> DMP_SLAVE_SIZE_TYPE_S;

		/* next size descriptor can be skipped */
		if (sztype == DMP_SLAVE_SIZE_DESC) {
			val = brcmf_chip_dmp_get_desc(ci, eromaddr, NULL);
			/* skip upper size descriptor if present */
			if (val & DMP_DESC_ADDRSIZE_GT32)
				brcmf_chip_dmp_get_desc(ci, eromaddr, NULL);
		}

		/* only look for 4K register regions */
		if (sztype != DMP_SLAVE_SIZE_4K)
			continue;

		stype = (val & DMP_SLAVE_TYPE) >> DMP_SLAVE_TYPE_S;

		/* only regular slave and wrapper */
		if (*regbase == 0 && stype == DMP_SLAVE_TYPE_SLAVE)
			*regbase = val & DMP_SLAVE_ADDR_BASE;
		if (*wrapbase == 0 && stype == wraptype)
			*wrapbase = val & DMP_SLAVE_ADDR_BASE;
	} while (*regbase == 0 || *wrapbase == 0);

	return 0;
}

static
int brcmf_chip_dmp_erom_scan(struct brcmf_chip_priv *ci)
{
	struct brcmf_core *core;
	u32 eromaddr;
	u8 desc_type = 0;
	u32 val;
	u16 id;
	u8 nmp, nsp, nmw, nsw, rev;
	u32 base, wrap;
	int err;

	eromaddr = ci->ops->read32(ci->ctx, CORE_CC_REG(SI_ENUM_BASE, eromptr));

	while (desc_type != DMP_DESC_EOT) {
		val = brcmf_chip_dmp_get_desc(ci, &eromaddr, &desc_type);
		if (!(val & DMP_DESC_VALID))
			continue;

		if (desc_type == DMP_DESC_EMPTY)
			continue;

		/* need a component descriptor */
		if (desc_type != DMP_DESC_COMPONENT)
			continue;

		id = (val & DMP_COMP_PARTNUM) >> DMP_COMP_PARTNUM_S;

		/* next descriptor must be component as well */
		val = brcmf_chip_dmp_get_desc(ci, &eromaddr, &desc_type);
		if (WARN_ON((val & DMP_DESC_TYPE_MSK) != DMP_DESC_COMPONENT))
			return -EFAULT;

		/* only look at cores with master port(s) */
		nmp = (val & DMP_COMP_NUM_MPORT) >> DMP_COMP_NUM_MPORT_S;
		nsp = (val & DMP_COMP_NUM_SPORT) >> DMP_COMP_NUM_SPORT_S;
		nmw = (val & DMP_COMP_NUM_MWRAP) >> DMP_COMP_NUM_MWRAP_S;
		nsw = (val & DMP_COMP_NUM_SWRAP) >> DMP_COMP_NUM_SWRAP_S;
		rev = (val & DMP_COMP_REVISION) >> DMP_COMP_REVISION_S;

		/* need core with ports */
		if (nmw + nsw == 0)
			continue;

		/* try to obtain register address info */
		err = brcmf_chip_dmp_get_regaddr(ci, &eromaddr, &base, &wrap);
		if (err)
			continue;

		/* finally a core to be added */
		core = brcmf_chip_add_core(ci, id, base, wrap);
		if (IS_ERR(core))
			return PTR_ERR(core);

		core->rev = rev;
	}

	return 0;
}

static int brcmf_chip_recognition(struct brcmf_chip_priv *ci)
{
	struct brcmf_core *core;
	u32 regdata;
	u32 socitype;

	/* Get CC core rev
	 * Chipid is assume to be at offset 0 from SI_ENUM_BASE
	 * For different chiptypes or old sdio hosts w/o chipcommon,
	 * other ways of recognition should be added here.
	 */
	regdata = ci->ops->read32(ci->ctx, CORE_CC_REG(SI_ENUM_BASE, chipid));
	ci->pub.chip = regdata & CID_ID_MASK;
	ci->pub.chiprev = (regdata & CID_REV_MASK) >> CID_REV_SHIFT;
	socitype = (regdata & CID_TYPE_MASK) >> CID_TYPE_SHIFT;

	brcmf_chip_name(ci->pub.chip, ci->pub.name, sizeof(ci->pub.name));
	brcmf_dbg(INFO, "found %s chip: BCM%s, rev=%d\n",
		  socitype == SOCI_SB ? "SB" : "AXI", ci->pub.name,
		  ci->pub.chiprev);

	if (socitype == SOCI_SB) {
		if (ci->pub.chip != BCM4329_CHIP_ID) {
			brcmf_err("SB chip is not supported\n");
			return -ENODEV;
		}
		ci->iscoreup = brcmf_chip_sb_iscoreup;
		ci->coredisable = brcmf_chip_sb_coredisable;
		ci->resetcore = brcmf_chip_sb_resetcore;

		core = brcmf_chip_add_core(ci, BCMA_CORE_CHIPCOMMON,
					   SI_ENUM_BASE, 0);
		brcmf_chip_sb_corerev(ci, core);
		core = brcmf_chip_add_core(ci, BCMA_CORE_SDIO_DEV,
					   BCM4329_CORE_BUS_BASE, 0);
		brcmf_chip_sb_corerev(ci, core);
		core = brcmf_chip_add_core(ci, BCMA_CORE_INTERNAL_MEM,
					   BCM4329_CORE_SOCRAM_BASE, 0);
		brcmf_chip_sb_corerev(ci, core);
		core = brcmf_chip_add_core(ci, BCMA_CORE_ARM_CM3,
					   BCM4329_CORE_ARM_BASE, 0);
		brcmf_chip_sb_corerev(ci, core);

		core = brcmf_chip_add_core(ci, BCMA_CORE_80211, 0x18001000, 0);
		brcmf_chip_sb_corerev(ci, core);
	} else if (socitype == SOCI_AI) {
		ci->iscoreup = brcmf_chip_ai_iscoreup;
		ci->coredisable = brcmf_chip_ai_coredisable;
		ci->resetcore = brcmf_chip_ai_resetcore;

		brcmf_chip_dmp_erom_scan(ci);
	} else {
		brcmf_err("chip backplane type %u is not supported\n",
			  socitype);
		return -ENODEV;
	}

	brcmf_chip_get_raminfo(ci);

	return brcmf_chip_cores_check(ci);
}

static void brcmf_chip_disable_arm(struct brcmf_chip_priv *chip, u16 id)
{
	struct brcmf_core *core;
	struct brcmf_core_priv *cr4;
	u32 val;


	core = brcmf_chip_get_core(&chip->pub, id);
	if (!core)
		return;

	switch (id) {
	case BCMA_CORE_ARM_CM3:
		brcmf_chip_coredisable(core, 0, 0);
		break;
	case BCMA_CORE_ARM_CR4:
		cr4 = container_of(core, struct brcmf_core_priv, pub);

		/* clear all IOCTL bits except HALT bit */
		val = chip->ops->read32(chip->ctx, cr4->wrapbase + BCMA_IOCTL);
		val &= ARMCR4_BCMA_IOCTL_CPUHALT;
		brcmf_chip_resetcore(core, val, ARMCR4_BCMA_IOCTL_CPUHALT,
				     ARMCR4_BCMA_IOCTL_CPUHALT);
		break;
	default:
		brcmf_err("unknown id: %u\n", id);
		break;
	}
}

static int brcmf_chip_setup(struct brcmf_chip_priv *chip)
{
	struct brcmf_chip *pub;
	struct brcmf_core_priv *cc;
	u32 base;
	u32 val;
	int ret = 0;

	pub = &chip->pub;
	cc = list_first_entry(&chip->cores, struct brcmf_core_priv, list);
	base = cc->pub.base;

	/* get chipcommon capabilites */
	pub->cc_caps = chip->ops->read32(chip->ctx,
					 CORE_CC_REG(base, capabilities));

	/* get pmu caps & rev */
	if (pub->cc_caps & CC_CAP_PMU) {
		val = chip->ops->read32(chip->ctx,
					CORE_CC_REG(base, pmucapabilities));
		pub->pmurev = val & PCAP_REV_MASK;
		pub->pmucaps = val;
	}

	brcmf_dbg(INFO, "ccrev=%d, pmurev=%d, pmucaps=0x%x\n",
		  cc->pub.rev, pub->pmurev, pub->pmucaps);

	/* execute bus core specific setup */
	if (chip->ops->setup)
		ret = chip->ops->setup(chip->ctx, pub);

	/*
	 * Make sure any on-chip ARM is off (in case strapping is wrong),
	 * or downloaded code was already running.
	 */
	brcmf_chip_disable_arm(chip, BCMA_CORE_ARM_CM3);
	brcmf_chip_disable_arm(chip, BCMA_CORE_ARM_CR4);
	return ret;
}

struct brcmf_chip *brcmf_chip_attach(void *ctx,
				     const struct brcmf_buscore_ops *ops)
{
	struct brcmf_chip_priv *chip;
	int err = 0;

	if (WARN_ON(!ops->read32))
		err = -EINVAL;
	if (WARN_ON(!ops->write32))
		err = -EINVAL;
	if (WARN_ON(!ops->prepare))
		err = -EINVAL;
	if (WARN_ON(!ops->exit_dl))
		err = -EINVAL;
	if (err < 0)
		return ERR_PTR(-EINVAL);

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return ERR_PTR(-ENOMEM);

	INIT_LIST_HEAD(&chip->cores);
	chip->num_cores = 0;
	chip->ops = ops;
	chip->ctx = ctx;

	err = ops->prepare(ctx);
	if (err < 0)
		goto fail;

	err = brcmf_chip_recognition(chip);
	if (err < 0)
		goto fail;

	err = brcmf_chip_setup(chip);
	if (err < 0)
		goto fail;

	return &chip->pub;

fail:
	brcmf_chip_detach(&chip->pub);
	return ERR_PTR(err);
}

void brcmf_chip_detach(struct brcmf_chip *pub)
{
	struct brcmf_chip_priv *chip;
	struct brcmf_core_priv *core;
	struct brcmf_core_priv *tmp;

	chip = container_of(pub, struct brcmf_chip_priv, pub);
	list_for_each_entry_safe(core, tmp, &chip->cores, list) {
		list_del(&core->list);
		kfree(core);
	}
	kfree(chip);
}

struct brcmf_core *brcmf_chip_get_core(struct brcmf_chip *pub, u16 coreid)
{
	struct brcmf_chip_priv *chip;
	struct brcmf_core_priv *core;

	chip = container_of(pub, struct brcmf_chip_priv, pub);
	list_for_each_entry(core, &chip->cores, list)
		if (core->pub.id == coreid)
			return &core->pub;

	return NULL;
}

struct brcmf_core *brcmf_chip_get_chipcommon(struct brcmf_chip *pub)
{
	struct brcmf_chip_priv *chip;
	struct brcmf_core_priv *cc;

	chip = container_of(pub, struct brcmf_chip_priv, pub);
	cc = list_first_entry(&chip->cores, struct brcmf_core_priv, list);
	if (WARN_ON(!cc || cc->pub.id != BCMA_CORE_CHIPCOMMON))
		return brcmf_chip_get_core(pub, BCMA_CORE_CHIPCOMMON);
	return &cc->pub;
}

bool brcmf_chip_iscoreup(struct brcmf_core *pub)
{
	struct brcmf_core_priv *core;

	core = container_of(pub, struct brcmf_core_priv, pub);
	return core->chip->iscoreup(core);
}

void brcmf_chip_coredisable(struct brcmf_core *pub, u32 prereset, u32 reset)
{
	struct brcmf_core_priv *core;

	core = container_of(pub, struct brcmf_core_priv, pub);
	core->chip->coredisable(core, prereset, reset);
}

void brcmf_chip_resetcore(struct brcmf_core *pub, u32 prereset, u32 reset,
			  u32 postreset)
{
	struct brcmf_core_priv *core;

	core = container_of(pub, struct brcmf_core_priv, pub);
	core->chip->resetcore(core, prereset, reset, postreset);
}

static void
brcmf_chip_cm3_enterdl(struct brcmf_chip_priv *chip)
{
	struct brcmf_core *core;

	brcmf_chip_disable_arm(chip, BCMA_CORE_ARM_CM3);
	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_80211);
	brcmf_chip_resetcore(core, D11_BCMA_IOCTL_PHYRESET |
				   D11_BCMA_IOCTL_PHYCLOCKEN,
			     D11_BCMA_IOCTL_PHYCLOCKEN,
			     D11_BCMA_IOCTL_PHYCLOCKEN);
	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_INTERNAL_MEM);
	brcmf_chip_resetcore(core, 0, 0, 0);
}

static bool brcmf_chip_cm3_exitdl(struct brcmf_chip_priv *chip)
{
	struct brcmf_core *core;

	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_INTERNAL_MEM);
	if (!brcmf_chip_iscoreup(core)) {
		brcmf_err("SOCRAM core is down after reset?\n");
		return false;
	}

	chip->ops->exit_dl(chip->ctx, &chip->pub, 0);

	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_ARM_CM3);
	brcmf_chip_resetcore(core, 0, 0, 0);

	return true;
}

static inline void
brcmf_chip_cr4_enterdl(struct brcmf_chip_priv *chip)
{
	struct brcmf_core *core;

	brcmf_chip_disable_arm(chip, BCMA_CORE_ARM_CR4);

	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_80211);
	brcmf_chip_resetcore(core, D11_BCMA_IOCTL_PHYRESET |
				   D11_BCMA_IOCTL_PHYCLOCKEN,
			     D11_BCMA_IOCTL_PHYCLOCKEN,
			     D11_BCMA_IOCTL_PHYCLOCKEN);
}

static bool brcmf_chip_cr4_exitdl(struct brcmf_chip_priv *chip, u32 rstvec)
{
	struct brcmf_core *core;

	chip->ops->exit_dl(chip->ctx, &chip->pub, rstvec);

	/* restore ARM */
	core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_ARM_CR4);
	brcmf_chip_resetcore(core, ARMCR4_BCMA_IOCTL_CPUHALT, 0, 0);

	return true;
}

void brcmf_chip_enter_download(struct brcmf_chip *pub)
{
	struct brcmf_chip_priv *chip;
	struct brcmf_core *arm;

	brcmf_dbg(TRACE, "Enter\n");

	chip = container_of(pub, struct brcmf_chip_priv, pub);
	arm = brcmf_chip_get_core(pub, BCMA_CORE_ARM_CR4);
	if (arm) {
		brcmf_chip_cr4_enterdl(chip);
		return;
	}

	brcmf_chip_cm3_enterdl(chip);
}

bool brcmf_chip_exit_download(struct brcmf_chip *pub, u32 rstvec)
{
	struct brcmf_chip_priv *chip;
	struct brcmf_core *arm;

	brcmf_dbg(TRACE, "Enter\n");

	chip = container_of(pub, struct brcmf_chip_priv, pub);
	arm = brcmf_chip_get_core(pub, BCMA_CORE_ARM_CR4);
	if (arm)
		return brcmf_chip_cr4_exitdl(chip, rstvec);

	return brcmf_chip_cm3_exitdl(chip);
}

bool brcmf_chip_sr_capable(struct brcmf_chip *pub)
{
	u32 base, addr, reg, pmu_cc3_mask = ~0;
	struct brcmf_chip_priv *chip;

	brcmf_dbg(TRACE, "Enter\n");

	/* old chips with PMU version less than 17 don't support save restore */
	if (pub->pmurev < 17)
		return false;

	base = brcmf_chip_get_chipcommon(pub)->base;
	chip = container_of(pub, struct brcmf_chip_priv, pub);

	switch (pub->chip) {
	case BCM4354_CHIP_ID:
		/* explicitly check SR engine enable bit */
		pmu_cc3_mask = BIT(2);
		/* fall-through */
	case BCM43241_CHIP_ID:
	case BCM4335_CHIP_ID:
	case BCM4339_CHIP_ID:
		/* read PMU chipcontrol register 3 */
		addr = CORE_CC_REG(base, chipcontrol_addr);
		chip->ops->write32(chip->ctx, addr, 3);
		addr = CORE_CC_REG(base, chipcontrol_data);
		reg = chip->ops->read32(chip->ctx, addr);
		return (reg & pmu_cc3_mask) != 0;
	default:
		addr = CORE_CC_REG(base, pmucapabilities_ext);
		reg = chip->ops->read32(chip->ctx, addr);
		if ((reg & PCAPEXT_SR_SUPPORTED_MASK) == 0)
			return false;

		addr = CORE_CC_REG(base, retention_ctl);
		reg = chip->ops->read32(chip->ctx, addr);
		return (reg & (PMU_RCTL_MACPHY_DISABLE_MASK |
			       PMU_RCTL_LOGIC_DISABLE_MASK)) == 0;
	}
}