aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/i2c/soc_camera/ov5642.c
blob: 0931898c79dd3f10eccdcbb39dec21cb4c632d16 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
/*
 * Driver for OV5642 CMOS Image Sensor from Omnivision
 *
 * Copyright (C) 2011, Bastian Hecht <hechtb@gmail.com>
 *
 * Based on Sony IMX074 Camera Driver
 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 *
 * Based on Omnivision OV7670 Camera Driver
 * Copyright (C) 2006-7 Jonathan Corbet <corbet@lwn.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <linux/v4l2-mediabus.h>

#include <media/soc_camera.h>
#include <media/v4l2-clk.h>
#include <media/v4l2-subdev.h>

/* OV5642 registers */
#define REG_CHIP_ID_HIGH		0x300a
#define REG_CHIP_ID_LOW			0x300b

#define REG_WINDOW_START_X_HIGH		0x3800
#define REG_WINDOW_START_X_LOW		0x3801
#define REG_WINDOW_START_Y_HIGH		0x3802
#define REG_WINDOW_START_Y_LOW		0x3803
#define REG_WINDOW_WIDTH_HIGH		0x3804
#define REG_WINDOW_WIDTH_LOW		0x3805
#define REG_WINDOW_HEIGHT_HIGH		0x3806
#define REG_WINDOW_HEIGHT_LOW		0x3807
#define REG_OUT_WIDTH_HIGH		0x3808
#define REG_OUT_WIDTH_LOW		0x3809
#define REG_OUT_HEIGHT_HIGH		0x380a
#define REG_OUT_HEIGHT_LOW		0x380b
#define REG_OUT_TOTAL_WIDTH_HIGH	0x380c
#define REG_OUT_TOTAL_WIDTH_LOW		0x380d
#define REG_OUT_TOTAL_HEIGHT_HIGH	0x380e
#define REG_OUT_TOTAL_HEIGHT_LOW	0x380f
#define REG_OUTPUT_FORMAT		0x4300
#define REG_ISP_CTRL_01			0x5001
#define REG_AVG_WINDOW_END_X_HIGH	0x5682
#define REG_AVG_WINDOW_END_X_LOW	0x5683
#define REG_AVG_WINDOW_END_Y_HIGH	0x5686
#define REG_AVG_WINDOW_END_Y_LOW	0x5687

/* active pixel array size */
#define OV5642_SENSOR_SIZE_X	2592
#define OV5642_SENSOR_SIZE_Y	1944

/*
 * About OV5642 resolution, cropping and binning:
 * This sensor supports it all, at least in the feature description.
 * Unfortunately, no combination of appropriate registers settings could make
 * the chip work the intended way. As it works with predefined register lists,
 * some undocumented registers are presumably changed there to achieve their
 * goals.
 * This driver currently only works for resolutions up to 720 lines with a
 * 1:1 scale. Hopefully these restrictions will be removed in the future.
 */
#define OV5642_MAX_WIDTH	OV5642_SENSOR_SIZE_X
#define OV5642_MAX_HEIGHT	720

/* default sizes */
#define OV5642_DEFAULT_WIDTH	1280
#define OV5642_DEFAULT_HEIGHT	OV5642_MAX_HEIGHT

/* minimum extra blanking */
#define BLANKING_EXTRA_WIDTH		500
#define BLANKING_EXTRA_HEIGHT		20

/*
 * the sensor's autoexposure is buggy when setting total_height low.
 * It tries to expose longer than 1 frame period without taking care of it
 * and this leads to weird output. So we set 1000 lines as minimum.
 */
#define BLANKING_MIN_HEIGHT		1000

struct regval_list {
	u16 reg_num;
	u8 value;
};

static struct regval_list ov5642_default_regs_init[] = {
	{ 0x3103, 0x93 },
	{ 0x3008, 0x82 },
	{ 0x3017, 0x7f },
	{ 0x3018, 0xfc },
	{ 0x3810, 0xc2 },
	{ 0x3615, 0xf0 },
	{ 0x3000, 0x0  },
	{ 0x3001, 0x0  },
	{ 0x3002, 0x0  },
	{ 0x3003, 0x0  },
	{ 0x3004, 0xff },
	{ 0x3030, 0x2b },
	{ 0x3011, 0x8  },
	{ 0x3010, 0x10 },
	{ 0x3604, 0x60 },
	{ 0x3622, 0x60 },
	{ 0x3621, 0x9  },
	{ 0x3709, 0x0  },
	{ 0x4000, 0x21 },
	{ 0x401d, 0x22 },
	{ 0x3600, 0x54 },
	{ 0x3605, 0x4  },
	{ 0x3606, 0x3f },
	{ 0x3c01, 0x80 },
	{ 0x300d, 0x22 },
	{ 0x3623, 0x22 },
	{ 0x5000, 0x4f },
	{ 0x5020, 0x4  },
	{ 0x5181, 0x79 },
	{ 0x5182, 0x0  },
	{ 0x5185, 0x22 },
	{ 0x5197, 0x1  },
	{ 0x5500, 0xa  },
	{ 0x5504, 0x0  },
	{ 0x5505, 0x7f },
	{ 0x5080, 0x8  },
	{ 0x300e, 0x18 },
	{ 0x4610, 0x0  },
	{ 0x471d, 0x5  },
	{ 0x4708, 0x6  },
	{ 0x370c, 0xa0 },
	{ 0x5687, 0x94 },
	{ 0x501f, 0x0  },
	{ 0x5000, 0x4f },
	{ 0x5001, 0xcf },
	{ 0x4300, 0x30 },
	{ 0x4300, 0x30 },
	{ 0x460b, 0x35 },
	{ 0x471d, 0x0  },
	{ 0x3002, 0xc  },
	{ 0x3002, 0x0  },
	{ 0x4713, 0x3  },
	{ 0x471c, 0x50 },
	{ 0x4721, 0x2  },
	{ 0x4402, 0x90 },
	{ 0x460c, 0x22 },
	{ 0x3815, 0x44 },
	{ 0x3503, 0x7  },
	{ 0x3501, 0x73 },
	{ 0x3502, 0x80 },
	{ 0x350b, 0x0  },
	{ 0x3818, 0xc8 },
	{ 0x3824, 0x11 },
	{ 0x3a00, 0x78 },
	{ 0x3a1a, 0x4  },
	{ 0x3a13, 0x30 },
	{ 0x3a18, 0x0  },
	{ 0x3a19, 0x7c },
	{ 0x3a08, 0x12 },
	{ 0x3a09, 0xc0 },
	{ 0x3a0a, 0xf  },
	{ 0x3a0b, 0xa0 },
	{ 0x350c, 0x7  },
	{ 0x350d, 0xd0 },
	{ 0x3a0d, 0x8  },
	{ 0x3a0e, 0x6  },
	{ 0x3500, 0x0  },
	{ 0x3501, 0x0  },
	{ 0x3502, 0x0  },
	{ 0x350a, 0x0  },
	{ 0x350b, 0x0  },
	{ 0x3503, 0x0  },
	{ 0x3a0f, 0x3c },
	{ 0x3a10, 0x32 },
	{ 0x3a1b, 0x3c },
	{ 0x3a1e, 0x32 },
	{ 0x3a11, 0x80 },
	{ 0x3a1f, 0x20 },
	{ 0x3030, 0x2b },
	{ 0x3a02, 0x0  },
	{ 0x3a03, 0x7d },
	{ 0x3a04, 0x0  },
	{ 0x3a14, 0x0  },
	{ 0x3a15, 0x7d },
	{ 0x3a16, 0x0  },
	{ 0x3a00, 0x78 },
	{ 0x3a08, 0x9  },
	{ 0x3a09, 0x60 },
	{ 0x3a0a, 0x7  },
	{ 0x3a0b, 0xd0 },
	{ 0x3a0d, 0x10 },
	{ 0x3a0e, 0xd  },
	{ 0x4407, 0x4  },
	{ 0x5193, 0x70 },
	{ 0x589b, 0x0  },
	{ 0x589a, 0xc0 },
	{ 0x401e, 0x20 },
	{ 0x4001, 0x42 },
	{ 0x401c, 0x6  },
	{ 0x3825, 0xac },
	{ 0x3827, 0xc  },
	{ 0x528a, 0x1  },
	{ 0x528b, 0x4  },
	{ 0x528c, 0x8  },
	{ 0x528d, 0x10 },
	{ 0x528e, 0x20 },
	{ 0x528f, 0x28 },
	{ 0x5290, 0x30 },
	{ 0x5292, 0x0  },
	{ 0x5293, 0x1  },
	{ 0x5294, 0x0  },
	{ 0x5295, 0x4  },
	{ 0x5296, 0x0  },
	{ 0x5297, 0x8  },
	{ 0x5298, 0x0  },
	{ 0x5299, 0x10 },
	{ 0x529a, 0x0  },
	{ 0x529b, 0x20 },
	{ 0x529c, 0x0  },
	{ 0x529d, 0x28 },
	{ 0x529e, 0x0  },
	{ 0x529f, 0x30 },
	{ 0x5282, 0x0  },
	{ 0x5300, 0x0  },
	{ 0x5301, 0x20 },
	{ 0x5302, 0x0  },
	{ 0x5303, 0x7c },
	{ 0x530c, 0x0  },
	{ 0x530d, 0xc  },
	{ 0x530e, 0x20 },
	{ 0x530f, 0x80 },
	{ 0x5310, 0x20 },
	{ 0x5311, 0x80 },
	{ 0x5308, 0x20 },
	{ 0x5309, 0x40 },
	{ 0x5304, 0x0  },
	{ 0x5305, 0x30 },
	{ 0x5306, 0x0  },
	{ 0x5307, 0x80 },
	{ 0x5314, 0x8  },
	{ 0x5315, 0x20 },
	{ 0x5319, 0x30 },
	{ 0x5316, 0x10 },
	{ 0x5317, 0x0  },
	{ 0x5318, 0x2  },
	{ 0x5380, 0x1  },
	{ 0x5381, 0x0  },
	{ 0x5382, 0x0  },
	{ 0x5383, 0x4e },
	{ 0x5384, 0x0  },
	{ 0x5385, 0xf  },
	{ 0x5386, 0x0  },
	{ 0x5387, 0x0  },
	{ 0x5388, 0x1  },
	{ 0x5389, 0x15 },
	{ 0x538a, 0x0  },
	{ 0x538b, 0x31 },
	{ 0x538c, 0x0  },
	{ 0x538d, 0x0  },
	{ 0x538e, 0x0  },
	{ 0x538f, 0xf  },
	{ 0x5390, 0x0  },
	{ 0x5391, 0xab },
	{ 0x5392, 0x0  },
	{ 0x5393, 0xa2 },
	{ 0x5394, 0x8  },
	{ 0x5480, 0x14 },
	{ 0x5481, 0x21 },
	{ 0x5482, 0x36 },
	{ 0x5483, 0x57 },
	{ 0x5484, 0x65 },
	{ 0x5485, 0x71 },
	{ 0x5486, 0x7d },
	{ 0x5487, 0x87 },
	{ 0x5488, 0x91 },
	{ 0x5489, 0x9a },
	{ 0x548a, 0xaa },
	{ 0x548b, 0xb8 },
	{ 0x548c, 0xcd },
	{ 0x548d, 0xdd },
	{ 0x548e, 0xea },
	{ 0x548f, 0x1d },
	{ 0x5490, 0x5  },
	{ 0x5491, 0x0  },
	{ 0x5492, 0x4  },
	{ 0x5493, 0x20 },
	{ 0x5494, 0x3  },
	{ 0x5495, 0x60 },
	{ 0x5496, 0x2  },
	{ 0x5497, 0xb8 },
	{ 0x5498, 0x2  },
	{ 0x5499, 0x86 },
	{ 0x549a, 0x2  },
	{ 0x549b, 0x5b },
	{ 0x549c, 0x2  },
	{ 0x549d, 0x3b },
	{ 0x549e, 0x2  },
	{ 0x549f, 0x1c },
	{ 0x54a0, 0x2  },
	{ 0x54a1, 0x4  },
	{ 0x54a2, 0x1  },
	{ 0x54a3, 0xed },
	{ 0x54a4, 0x1  },
	{ 0x54a5, 0xc5 },
	{ 0x54a6, 0x1  },
	{ 0x54a7, 0xa5 },
	{ 0x54a8, 0x1  },
	{ 0x54a9, 0x6c },
	{ 0x54aa, 0x1  },
	{ 0x54ab, 0x41 },
	{ 0x54ac, 0x1  },
	{ 0x54ad, 0x20 },
	{ 0x54ae, 0x0  },
	{ 0x54af, 0x16 },
	{ 0x54b0, 0x1  },
	{ 0x54b1, 0x20 },
	{ 0x54b2, 0x0  },
	{ 0x54b3, 0x10 },
	{ 0x54b4, 0x0  },
	{ 0x54b5, 0xf0 },
	{ 0x54b6, 0x0  },
	{ 0x54b7, 0xdf },
	{ 0x5402, 0x3f },
	{ 0x5403, 0x0  },
	{ 0x3406, 0x0  },
	{ 0x5180, 0xff },
	{ 0x5181, 0x52 },
	{ 0x5182, 0x11 },
	{ 0x5183, 0x14 },
	{ 0x5184, 0x25 },
	{ 0x5185, 0x24 },
	{ 0x5186, 0x6  },
	{ 0x5187, 0x8  },
	{ 0x5188, 0x8  },
	{ 0x5189, 0x7c },
	{ 0x518a, 0x60 },
	{ 0x518b, 0xb2 },
	{ 0x518c, 0xb2 },
	{ 0x518d, 0x44 },
	{ 0x518e, 0x3d },
	{ 0x518f, 0x58 },
	{ 0x5190, 0x46 },
	{ 0x5191, 0xf8 },
	{ 0x5192, 0x4  },
	{ 0x5193, 0x70 },
	{ 0x5194, 0xf0 },
	{ 0x5195, 0xf0 },
	{ 0x5196, 0x3  },
	{ 0x5197, 0x1  },
	{ 0x5198, 0x4  },
	{ 0x5199, 0x12 },
	{ 0x519a, 0x4  },
	{ 0x519b, 0x0  },
	{ 0x519c, 0x6  },
	{ 0x519d, 0x82 },
	{ 0x519e, 0x0  },
	{ 0x5025, 0x80 },
	{ 0x3a0f, 0x38 },
	{ 0x3a10, 0x30 },
	{ 0x3a1b, 0x3a },
	{ 0x3a1e, 0x2e },
	{ 0x3a11, 0x60 },
	{ 0x3a1f, 0x10 },
	{ 0x5688, 0xa6 },
	{ 0x5689, 0x6a },
	{ 0x568a, 0xea },
	{ 0x568b, 0xae },
	{ 0x568c, 0xa6 },
	{ 0x568d, 0x6a },
	{ 0x568e, 0x62 },
	{ 0x568f, 0x26 },
	{ 0x5583, 0x40 },
	{ 0x5584, 0x40 },
	{ 0x5580, 0x2  },
	{ 0x5000, 0xcf },
	{ 0x5800, 0x27 },
	{ 0x5801, 0x19 },
	{ 0x5802, 0x12 },
	{ 0x5803, 0xf  },
	{ 0x5804, 0x10 },
	{ 0x5805, 0x15 },
	{ 0x5806, 0x1e },
	{ 0x5807, 0x2f },
	{ 0x5808, 0x15 },
	{ 0x5809, 0xd  },
	{ 0x580a, 0xa  },
	{ 0x580b, 0x9  },
	{ 0x580c, 0xa  },
	{ 0x580d, 0xc  },
	{ 0x580e, 0x12 },
	{ 0x580f, 0x19 },
	{ 0x5810, 0xb  },
	{ 0x5811, 0x7  },
	{ 0x5812, 0x4  },
	{ 0x5813, 0x3  },
	{ 0x5814, 0x3  },
	{ 0x5815, 0x6  },
	{ 0x5816, 0xa  },
	{ 0x5817, 0xf  },
	{ 0x5818, 0xa  },
	{ 0x5819, 0x5  },
	{ 0x581a, 0x1  },
	{ 0x581b, 0x0  },
	{ 0x581c, 0x0  },
	{ 0x581d, 0x3  },
	{ 0x581e, 0x8  },
	{ 0x581f, 0xc  },
	{ 0x5820, 0xa  },
	{ 0x5821, 0x5  },
	{ 0x5822, 0x1  },
	{ 0x5823, 0x0  },
	{ 0x5824, 0x0  },
	{ 0x5825, 0x3  },
	{ 0x5826, 0x8  },
	{ 0x5827, 0xc  },
	{ 0x5828, 0xe  },
	{ 0x5829, 0x8  },
	{ 0x582a, 0x6  },
	{ 0x582b, 0x4  },
	{ 0x582c, 0x5  },
	{ 0x582d, 0x7  },
	{ 0x582e, 0xb  },
	{ 0x582f, 0x12 },
	{ 0x5830, 0x18 },
	{ 0x5831, 0x10 },
	{ 0x5832, 0xc  },
	{ 0x5833, 0xa  },
	{ 0x5834, 0xb  },
	{ 0x5835, 0xe  },
	{ 0x5836, 0x15 },
	{ 0x5837, 0x19 },
	{ 0x5838, 0x32 },
	{ 0x5839, 0x1f },
	{ 0x583a, 0x18 },
	{ 0x583b, 0x16 },
	{ 0x583c, 0x17 },
	{ 0x583d, 0x1e },
	{ 0x583e, 0x26 },
	{ 0x583f, 0x53 },
	{ 0x5840, 0x10 },
	{ 0x5841, 0xf  },
	{ 0x5842, 0xd  },
	{ 0x5843, 0xc  },
	{ 0x5844, 0xe  },
	{ 0x5845, 0x9  },
	{ 0x5846, 0x11 },
	{ 0x5847, 0x10 },
	{ 0x5848, 0x10 },
	{ 0x5849, 0x10 },
	{ 0x584a, 0x10 },
	{ 0x584b, 0xe  },
	{ 0x584c, 0x10 },
	{ 0x584d, 0x10 },
	{ 0x584e, 0x11 },
	{ 0x584f, 0x10 },
	{ 0x5850, 0xf  },
	{ 0x5851, 0xc  },
	{ 0x5852, 0xf  },
	{ 0x5853, 0x10 },
	{ 0x5854, 0x10 },
	{ 0x5855, 0xf  },
	{ 0x5856, 0xe  },
	{ 0x5857, 0xb  },
	{ 0x5858, 0x10 },
	{ 0x5859, 0xd  },
	{ 0x585a, 0xd  },
	{ 0x585b, 0xc  },
	{ 0x585c, 0xc  },
	{ 0x585d, 0xc  },
	{ 0x585e, 0xb  },
	{ 0x585f, 0xc  },
	{ 0x5860, 0xc  },
	{ 0x5861, 0xc  },
	{ 0x5862, 0xd  },
	{ 0x5863, 0x8  },
	{ 0x5864, 0x11 },
	{ 0x5865, 0x18 },
	{ 0x5866, 0x18 },
	{ 0x5867, 0x19 },
	{ 0x5868, 0x17 },
	{ 0x5869, 0x19 },
	{ 0x586a, 0x16 },
	{ 0x586b, 0x13 },
	{ 0x586c, 0x13 },
	{ 0x586d, 0x12 },
	{ 0x586e, 0x13 },
	{ 0x586f, 0x16 },
	{ 0x5870, 0x14 },
	{ 0x5871, 0x12 },
	{ 0x5872, 0x10 },
	{ 0x5873, 0x11 },
	{ 0x5874, 0x11 },
	{ 0x5875, 0x16 },
	{ 0x5876, 0x14 },
	{ 0x5877, 0x11 },
	{ 0x5878, 0x10 },
	{ 0x5879, 0xf  },
	{ 0x587a, 0x10 },
	{ 0x587b, 0x14 },
	{ 0x587c, 0x13 },
	{ 0x587d, 0x12 },
	{ 0x587e, 0x11 },
	{ 0x587f, 0x11 },
	{ 0x5880, 0x12 },
	{ 0x5881, 0x15 },
	{ 0x5882, 0x14 },
	{ 0x5883, 0x15 },
	{ 0x5884, 0x15 },
	{ 0x5885, 0x15 },
	{ 0x5886, 0x13 },
	{ 0x5887, 0x17 },
	{ 0x3710, 0x10 },
	{ 0x3632, 0x51 },
	{ 0x3702, 0x10 },
	{ 0x3703, 0xb2 },
	{ 0x3704, 0x18 },
	{ 0x370b, 0x40 },
	{ 0x370d, 0x3  },
	{ 0x3631, 0x1  },
	{ 0x3632, 0x52 },
	{ 0x3606, 0x24 },
	{ 0x3620, 0x96 },
	{ 0x5785, 0x7  },
	{ 0x3a13, 0x30 },
	{ 0x3600, 0x52 },
	{ 0x3604, 0x48 },
	{ 0x3606, 0x1b },
	{ 0x370d, 0xb  },
	{ 0x370f, 0xc0 },
	{ 0x3709, 0x1  },
	{ 0x3823, 0x0  },
	{ 0x5007, 0x0  },
	{ 0x5009, 0x0  },
	{ 0x5011, 0x0  },
	{ 0x5013, 0x0  },
	{ 0x519e, 0x0  },
	{ 0x5086, 0x0  },
	{ 0x5087, 0x0  },
	{ 0x5088, 0x0  },
	{ 0x5089, 0x0  },
	{ 0x302b, 0x0  },
	{ 0x3503, 0x7  },
	{ 0x3011, 0x8  },
	{ 0x350c, 0x2  },
	{ 0x350d, 0xe4 },
	{ 0x3621, 0xc9 },
	{ 0x370a, 0x81 },
	{ 0xffff, 0xff },
};

static struct regval_list ov5642_default_regs_finalise[] = {
	{ 0x3810, 0xc2 },
	{ 0x3818, 0xc9 },
	{ 0x381c, 0x10 },
	{ 0x381d, 0xa0 },
	{ 0x381e, 0x5  },
	{ 0x381f, 0xb0 },
	{ 0x3820, 0x0  },
	{ 0x3821, 0x0  },
	{ 0x3824, 0x11 },
	{ 0x3a08, 0x1b },
	{ 0x3a09, 0xc0 },
	{ 0x3a0a, 0x17 },
	{ 0x3a0b, 0x20 },
	{ 0x3a0d, 0x2  },
	{ 0x3a0e, 0x1  },
	{ 0x401c, 0x4  },
	{ 0x5682, 0x5  },
	{ 0x5683, 0x0  },
	{ 0x5686, 0x2  },
	{ 0x5687, 0xcc },
	{ 0x5001, 0x4f },
	{ 0x589b, 0x6  },
	{ 0x589a, 0xc5 },
	{ 0x3503, 0x0  },
	{ 0x460c, 0x20 },
	{ 0x460b, 0x37 },
	{ 0x471c, 0xd0 },
	{ 0x471d, 0x5  },
	{ 0x3815, 0x1  },
	{ 0x3818, 0xc1 },
	{ 0x501f, 0x0  },
	{ 0x5002, 0xe0 },
	{ 0x4300, 0x32 }, /* UYVY */
	{ 0x3002, 0x1c },
	{ 0x4800, 0x14 },
	{ 0x4801, 0xf  },
	{ 0x3007, 0x3b },
	{ 0x300e, 0x4  },
	{ 0x4803, 0x50 },
	{ 0x3815, 0x1  },
	{ 0x4713, 0x2  },
	{ 0x4842, 0x1  },
	{ 0x300f, 0xe  },
	{ 0x3003, 0x3  },
	{ 0x3003, 0x1  },
	{ 0xffff, 0xff },
};

struct ov5642_datafmt {
	u32	code;
	enum v4l2_colorspace		colorspace;
};

struct ov5642 {
	struct v4l2_subdev		subdev;
	const struct ov5642_datafmt	*fmt;
	struct v4l2_rect                crop_rect;
	struct v4l2_clk			*clk;

	/* blanking information */
	int total_width;
	int total_height;
};

static const struct ov5642_datafmt ov5642_colour_fmts[] = {
	{MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG},
};

static struct ov5642 *to_ov5642(const struct i2c_client *client)
{
	return container_of(i2c_get_clientdata(client), struct ov5642, subdev);
}

/* Find a data format by a pixel code in an array */
static const struct ov5642_datafmt
			*ov5642_find_datafmt(u32 code)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ov5642_colour_fmts); i++)
		if (ov5642_colour_fmts[i].code == code)
			return ov5642_colour_fmts + i;

	return NULL;
}

static int reg_read(struct i2c_client *client, u16 reg, u8 *val)
{
	int ret;
	/* We have 16-bit i2c addresses - care for endianness */
	unsigned char data[2] = { reg >> 8, reg & 0xff };

	ret = i2c_master_send(client, data, 2);
	if (ret < 2) {
		dev_err(&client->dev, "%s: i2c read error, reg: %x\n",
			__func__, reg);
		return ret < 0 ? ret : -EIO;
	}

	ret = i2c_master_recv(client, val, 1);
	if (ret < 1) {
		dev_err(&client->dev, "%s: i2c read error, reg: %x\n",
				__func__, reg);
		return ret < 0 ? ret : -EIO;
	}
	return 0;
}

static int reg_write(struct i2c_client *client, u16 reg, u8 val)
{
	int ret;
	unsigned char data[3] = { reg >> 8, reg & 0xff, val };

	ret = i2c_master_send(client, data, 3);
	if (ret < 3) {
		dev_err(&client->dev, "%s: i2c write error, reg: %x\n",
			__func__, reg);
		return ret < 0 ? ret : -EIO;
	}

	return 0;
}

/*
 * convenience function to write 16 bit register values that are split up
 * into two consecutive high and low parts
 */
static int reg_write16(struct i2c_client *client, u16 reg, u16 val16)
{
	int ret;

	ret = reg_write(client, reg, val16 >> 8);
	if (ret)
		return ret;
	return reg_write(client, reg + 1, val16 & 0x00ff);
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov5642_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int ret;
	u8 val;

	if (reg->reg & ~0xffff)
		return -EINVAL;

	reg->size = 1;

	ret = reg_read(client, reg->reg, &val);
	if (!ret)
		reg->val = (__u64)val;

	return ret;
}

static int ov5642_set_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (reg->reg & ~0xffff || reg->val & ~0xff)
		return -EINVAL;

	return reg_write(client, reg->reg, reg->val);
}
#endif

static int ov5642_write_array(struct i2c_client *client,
				struct regval_list *vals)
{
	while (vals->reg_num != 0xffff || vals->value != 0xff) {
		int ret = reg_write(client, vals->reg_num, vals->value);
		if (ret < 0)
			return ret;
		vals++;
	}
	dev_dbg(&client->dev, "Register list loaded\n");
	return 0;
}

static int ov5642_set_resolution(struct v4l2_subdev *sd)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);
	int width = priv->crop_rect.width;
	int height = priv->crop_rect.height;
	int total_width = priv->total_width;
	int total_height = priv->total_height;
	int start_x = (OV5642_SENSOR_SIZE_X - width) / 2;
	int start_y = (OV5642_SENSOR_SIZE_Y - height) / 2;
	int ret;

	/*
	 * This should set the starting point for cropping.
	 * Doesn't work so far.
	 */
	ret = reg_write16(client, REG_WINDOW_START_X_HIGH, start_x);
	if (!ret)
		ret = reg_write16(client, REG_WINDOW_START_Y_HIGH, start_y);
	if (!ret) {
		priv->crop_rect.left = start_x;
		priv->crop_rect.top = start_y;
	}

	if (!ret)
		ret = reg_write16(client, REG_WINDOW_WIDTH_HIGH, width);
	if (!ret)
		ret = reg_write16(client, REG_WINDOW_HEIGHT_HIGH, height);
	if (ret)
		return ret;
	priv->crop_rect.width = width;
	priv->crop_rect.height = height;

	/* Set the output window size. Only 1:1 scale is supported so far. */
	ret = reg_write16(client, REG_OUT_WIDTH_HIGH, width);
	if (!ret)
		ret = reg_write16(client, REG_OUT_HEIGHT_HIGH, height);

	/* Total width = output size + blanking */
	if (!ret)
		ret = reg_write16(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width);
	if (!ret)
		ret = reg_write16(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height);

	/* Sets the window for AWB calculations */
	if (!ret)
		ret = reg_write16(client, REG_AVG_WINDOW_END_X_HIGH, width);
	if (!ret)
		ret = reg_write16(client, REG_AVG_WINDOW_END_Y_HIGH, height);

	return ret;
}

static int ov5642_set_fmt(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_format *format)
{
	struct v4l2_mbus_framefmt *mf = &format->format;
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);
	const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code);

	if (format->pad)
		return -EINVAL;

	mf->width = priv->crop_rect.width;
	mf->height = priv->crop_rect.height;

	if (!fmt) {
		if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;
		mf->code	= ov5642_colour_fmts[0].code;
		mf->colorspace	= ov5642_colour_fmts[0].colorspace;
	}

	mf->field	= V4L2_FIELD_NONE;

	if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
		priv->fmt = fmt;
	else
		cfg->try_fmt = *mf;
	return 0;
}

static int ov5642_get_fmt(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_format *format)
{
	struct v4l2_mbus_framefmt *mf = &format->format;
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);

	const struct ov5642_datafmt *fmt = priv->fmt;

	if (format->pad)
		return -EINVAL;

	mf->code	= fmt->code;
	mf->colorspace	= fmt->colorspace;
	mf->width	= priv->crop_rect.width;
	mf->height	= priv->crop_rect.height;
	mf->field	= V4L2_FIELD_NONE;

	return 0;
}

static int ov5642_enum_mbus_code(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_mbus_code_enum *code)
{
	if (code->pad || code->index >= ARRAY_SIZE(ov5642_colour_fmts))
		return -EINVAL;

	code->code = ov5642_colour_fmts[code->index].code;
	return 0;
}

static int ov5642_set_selection(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_selection *sel)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);
	struct v4l2_rect rect = sel->r;
	int ret;

	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
	    sel->target != V4L2_SEL_TGT_CROP)
		return -EINVAL;

	v4l_bound_align_image(&rect.width, 48, OV5642_MAX_WIDTH, 1,
			      &rect.height, 32, OV5642_MAX_HEIGHT, 1, 0);

	priv->crop_rect.width	= rect.width;
	priv->crop_rect.height	= rect.height;
	priv->total_width	= rect.width + BLANKING_EXTRA_WIDTH;
	priv->total_height	= max_t(int, rect.height +
							BLANKING_EXTRA_HEIGHT,
							BLANKING_MIN_HEIGHT);
	priv->crop_rect.width		= rect.width;
	priv->crop_rect.height		= rect.height;

	ret = ov5642_write_array(client, ov5642_default_regs_init);
	if (!ret)
		ret = ov5642_set_resolution(sd);
	if (!ret)
		ret = ov5642_write_array(client, ov5642_default_regs_finalise);

	return ret;
}

static int ov5642_get_selection(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_selection *sel)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov5642 *priv = to_ov5642(client);

	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	switch (sel->target) {
	case V4L2_SEL_TGT_CROP_BOUNDS:
		sel->r.left = 0;
		sel->r.top = 0;
		sel->r.width = OV5642_MAX_WIDTH;
		sel->r.height = OV5642_MAX_HEIGHT;
		return 0;
	case V4L2_SEL_TGT_CROP:
		sel->r = priv->crop_rect;
		return 0;
	default:
		return -EINVAL;
	}
}

static int ov5642_g_mbus_config(struct v4l2_subdev *sd,
				struct v4l2_mbus_config *cfg)
{
	cfg->type = V4L2_MBUS_CSI2_DPHY;
	cfg->flags = V4L2_MBUS_CSI2_2_LANE | V4L2_MBUS_CSI2_CHANNEL_0 |
					V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;

	return 0;
}

static int ov5642_s_power(struct v4l2_subdev *sd, int on)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
	struct ov5642 *priv = to_ov5642(client);
	int ret;

	if (!on)
		return soc_camera_power_off(&client->dev, ssdd, priv->clk);

	ret = soc_camera_power_on(&client->dev, ssdd, priv->clk);
	if (ret < 0)
		return ret;

	ret = ov5642_write_array(client, ov5642_default_regs_init);
	if (!ret)
		ret = ov5642_set_resolution(sd);
	if (!ret)
		ret = ov5642_write_array(client, ov5642_default_regs_finalise);

	return ret;
}

static const struct v4l2_subdev_video_ops ov5642_subdev_video_ops = {
	.g_mbus_config	= ov5642_g_mbus_config,
};

static const struct v4l2_subdev_pad_ops ov5642_subdev_pad_ops = {
	.enum_mbus_code = ov5642_enum_mbus_code,
	.get_selection	= ov5642_get_selection,
	.set_selection	= ov5642_set_selection,
	.get_fmt	= ov5642_get_fmt,
	.set_fmt	= ov5642_set_fmt,
};

static const struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
	.s_power	= ov5642_s_power,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register	= ov5642_get_register,
	.s_register	= ov5642_set_register,
#endif
};

static const struct v4l2_subdev_ops ov5642_subdev_ops = {
	.core	= &ov5642_subdev_core_ops,
	.video	= &ov5642_subdev_video_ops,
	.pad	= &ov5642_subdev_pad_ops,
};

static int ov5642_video_probe(struct i2c_client *client)
{
	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
	int ret;
	u8 id_high, id_low;
	u16 id;

	ret = ov5642_s_power(subdev, 1);
	if (ret < 0)
		return ret;

	/* Read sensor Model ID */
	ret = reg_read(client, REG_CHIP_ID_HIGH, &id_high);
	if (ret < 0)
		goto done;

	id = id_high << 8;

	ret = reg_read(client, REG_CHIP_ID_LOW, &id_low);
	if (ret < 0)
		goto done;

	id |= id_low;

	dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);

	if (id != 0x5642) {
		ret = -ENODEV;
		goto done;
	}

	ret = 0;

done:
	ov5642_s_power(subdev, 0);
	return ret;
}

static int ov5642_probe(struct i2c_client *client,
			const struct i2c_device_id *did)
{
	struct ov5642 *priv;
	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
	int ret;

	if (!ssdd) {
		dev_err(&client->dev, "OV5642: missing platform data!\n");
		return -EINVAL;
	}

	priv = devm_kzalloc(&client->dev, sizeof(struct ov5642), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops);

	priv->fmt		= &ov5642_colour_fmts[0];

	priv->crop_rect.width	= OV5642_DEFAULT_WIDTH;
	priv->crop_rect.height	= OV5642_DEFAULT_HEIGHT;
	priv->crop_rect.left	= (OV5642_MAX_WIDTH - OV5642_DEFAULT_WIDTH) / 2;
	priv->crop_rect.top	= (OV5642_MAX_HEIGHT - OV5642_DEFAULT_HEIGHT) / 2;
	priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH;
	priv->total_height = BLANKING_MIN_HEIGHT;

	priv->clk = v4l2_clk_get(&client->dev, "mclk");
	if (IS_ERR(priv->clk))
		return PTR_ERR(priv->clk);

	ret = ov5642_video_probe(client);
	if (ret < 0)
		v4l2_clk_put(priv->clk);

	return ret;
}

static int ov5642_remove(struct i2c_client *client)
{
	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
	struct ov5642 *priv = to_ov5642(client);

	v4l2_clk_put(priv->clk);
	if (ssdd->free_bus)
		ssdd->free_bus(ssdd);

	return 0;
}

static const struct i2c_device_id ov5642_id[] = {
	{ "ov5642", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ov5642_id);

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov5642_of_match[] = {
	{ .compatible = "ovti,ov5642" },
	{ },
};
MODULE_DEVICE_TABLE(of, ov5642_of_match);
#endif

static struct i2c_driver ov5642_i2c_driver = {
	.driver = {
		.name = "ov5642",
		.of_match_table = of_match_ptr(ov5642_of_match),
	},
	.probe		= ov5642_probe,
	.remove		= ov5642_remove,
	.id_table	= ov5642_id,
};

module_i2c_driver(ov5642_i2c_driver);

MODULE_DESCRIPTION("Omnivision OV5642 Camera driver");
MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
MODULE_LICENSE("GPL v2");

Privacy Policy