summaryrefslogtreecommitdiff
path: root/drivers/media/video/ov9740.c
blob: 9558aca86818bc91187f8a1cada8f50e9c2ee62f (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
/*
 * OmniVision OV9740 Camera Driver
 *
 * Copyright (C) 2011 NVIDIA Corporation
 *
 * Based on ov9640 camera driver.
 *
 * 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/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>

#include <media/soc_camera.h>
#include <media/soc_mediabus.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>

#define to_ov9740(sd)		container_of(sd, struct ov9740_priv, subdev)

/* General Status Registers */
#define OV9740_MODEL_ID_HI		0x0000
#define OV9740_MODEL_ID_LO		0x0001
#define OV9740_REVISION_NUMBER		0x0002
#define OV9740_MANUFACTURER_ID		0x0003
#define OV9740_SMIA_VERSION		0x0004

/* General Setup Registers */
#define OV9740_MODE_SELECT		0x0100
#define OV9740_IMAGE_ORT		0x0101
#define OV9740_SOFTWARE_RESET		0x0103
#define OV9740_GRP_PARAM_HOLD		0x0104
#define OV9740_MSK_CORRUP_FM		0x0105

/* Timing Setting */
#define OV9740_FRM_LENGTH_LN_HI		0x0340 /* VTS */
#define OV9740_FRM_LENGTH_LN_LO		0x0341 /* VTS */
#define OV9740_LN_LENGTH_PCK_HI		0x0342 /* HTS */
#define OV9740_LN_LENGTH_PCK_LO		0x0343 /* HTS */
#define OV9740_X_ADDR_START_HI		0x0344
#define OV9740_X_ADDR_START_LO		0x0345
#define OV9740_Y_ADDR_START_HI		0x0346
#define OV9740_Y_ADDR_START_LO		0x0347
#define OV9740_X_ADDR_END_HI		0x0348
#define OV9740_X_ADDR_END_LO		0x0349
#define OV9740_Y_ADDR_END_HI		0x034a
#define OV9740_Y_ADDR_END_LO		0x034b
#define OV9740_X_OUTPUT_SIZE_HI		0x034c
#define OV9740_X_OUTPUT_SIZE_LO		0x034d
#define OV9740_Y_OUTPUT_SIZE_HI		0x034e
#define OV9740_Y_OUTPUT_SIZE_LO		0x034f

/* IO Control Registers */
#define OV9740_IO_CREL00		0x3002
#define OV9740_IO_CREL01		0x3004
#define OV9740_IO_CREL02		0x3005
#define OV9740_IO_OUTPUT_SEL01		0x3026
#define OV9740_IO_OUTPUT_SEL02		0x3027

/* AWB Registers */
#define OV9740_AWB_MANUAL_CTRL		0x3406

/* Analog Control Registers */
#define OV9740_ANALOG_CTRL01		0x3601
#define OV9740_ANALOG_CTRL02		0x3602
#define OV9740_ANALOG_CTRL03		0x3603
#define OV9740_ANALOG_CTRL04		0x3604
#define OV9740_ANALOG_CTRL10		0x3610
#define OV9740_ANALOG_CTRL12		0x3612
#define OV9740_ANALOG_CTRL15		0x3615
#define OV9740_ANALOG_CTRL20		0x3620
#define OV9740_ANALOG_CTRL21		0x3621
#define OV9740_ANALOG_CTRL22		0x3622
#define OV9740_ANALOG_CTRL30		0x3630
#define OV9740_ANALOG_CTRL31		0x3631
#define OV9740_ANALOG_CTRL32		0x3632
#define OV9740_ANALOG_CTRL33		0x3633

/* Sensor Control */
#define OV9740_SENSOR_CTRL03		0x3703
#define OV9740_SENSOR_CTRL04		0x3704
#define OV9740_SENSOR_CTRL05		0x3705
#define OV9740_SENSOR_CTRL07		0x3707

/* Timing Control */
#define OV9740_TIMING_CTRL17		0x3817
#define OV9740_TIMING_CTRL19		0x3819
#define OV9740_TIMING_CTRL33		0x3833
#define OV9740_TIMING_CTRL35		0x3835

/* Banding Filter */
#define OV9740_AEC_MAXEXPO_60_H		0x3a02
#define OV9740_AEC_MAXEXPO_60_L		0x3a03
#define OV9740_AEC_B50_STEP_HI		0x3a08
#define OV9740_AEC_B50_STEP_LO		0x3a09
#define OV9740_AEC_B60_STEP_HI		0x3a0a
#define OV9740_AEC_B60_STEP_LO		0x3a0b
#define OV9740_AEC_CTRL0D		0x3a0d
#define OV9740_AEC_CTRL0E		0x3a0e
#define OV9740_AEC_MAXEXPO_50_H		0x3a14
#define OV9740_AEC_MAXEXPO_50_L		0x3a15

/* AEC/AGC Control */
#define OV9740_AEC_ENABLE		0x3503
#define OV9740_GAIN_CEILING_01		0x3a18
#define OV9740_GAIN_CEILING_02		0x3a19
#define OV9740_AEC_HI_THRESHOLD		0x3a11
#define OV9740_AEC_3A1A			0x3a1a
#define OV9740_AEC_CTRL1B_WPT2		0x3a1b
#define OV9740_AEC_CTRL0F_WPT		0x3a0f
#define OV9740_AEC_CTRL10_BPT		0x3a10
#define OV9740_AEC_CTRL1E_BPT2		0x3a1e
#define OV9740_AEC_LO_THRESHOLD		0x3a1f

/* BLC Control */
#define OV9740_BLC_AUTO_ENABLE		0x4002
#define OV9740_BLC_MODE			0x4005

/* VFIFO */
#define OV9740_VFIFO_READ_START_HI	0x4608
#define OV9740_VFIFO_READ_START_LO	0x4609

/* DVP Control */
#define OV9740_DVP_VSYNC_CTRL02		0x4702
#define OV9740_DVP_VSYNC_MODE		0x4704
#define OV9740_DVP_VSYNC_CTRL06		0x4706

/* PLL Setting */
#define OV9740_PLL_MODE_CTRL01		0x3104
#define OV9740_PRE_PLL_CLK_DIV		0x0305
#define OV9740_PLL_MULTIPLIER		0x0307
#define OV9740_VT_SYS_CLK_DIV		0x0303
#define OV9740_VT_PIX_CLK_DIV		0x0301
#define OV9740_PLL_CTRL3010		0x3010
#define OV9740_VFIFO_CTRL00		0x460e

/* ISP Control */
#define OV9740_ISP_CTRL00		0x5000
#define OV9740_ISP_CTRL01		0x5001
#define OV9740_ISP_CTRL03		0x5003
#define OV9740_ISP_CTRL05		0x5005
#define OV9740_ISP_CTRL12		0x5012
#define OV9740_ISP_CTRL19		0x5019
#define OV9740_ISP_CTRL1A		0x501a
#define OV9740_ISP_CTRL1E		0x501e
#define OV9740_ISP_CTRL1F		0x501f
#define OV9740_ISP_CTRL20		0x5020
#define OV9740_ISP_CTRL21		0x5021

/* AWB */
#define OV9740_AWB_CTRL00		0x5180
#define OV9740_AWB_CTRL01		0x5181
#define OV9740_AWB_CTRL02		0x5182
#define OV9740_AWB_CTRL03		0x5183
#define OV9740_AWB_ADV_CTRL01		0x5184
#define OV9740_AWB_ADV_CTRL02		0x5185
#define OV9740_AWB_ADV_CTRL03		0x5186
#define OV9740_AWB_ADV_CTRL04		0x5187
#define OV9740_AWB_ADV_CTRL05		0x5188
#define OV9740_AWB_ADV_CTRL06		0x5189
#define OV9740_AWB_ADV_CTRL07		0x518a
#define OV9740_AWB_ADV_CTRL08		0x518b
#define OV9740_AWB_ADV_CTRL09		0x518c
#define OV9740_AWB_ADV_CTRL10		0x518d
#define OV9740_AWB_ADV_CTRL11		0x518e
#define OV9740_AWB_CTRL0F		0x518f
#define OV9740_AWB_CTRL10		0x5190
#define OV9740_AWB_CTRL11		0x5191
#define OV9740_AWB_CTRL12		0x5192
#define OV9740_AWB_CTRL13		0x5193
#define OV9740_AWB_CTRL14		0x5194

/* MIPI Control */
#define OV9740_MIPI_CTRL00		0x4800
#define OV9740_MIPI_3837		0x3837
#define OV9740_MIPI_CTRL01		0x4801
#define OV9740_MIPI_CTRL03		0x4803
#define OV9740_MIPI_CTRL05		0x4805
#define OV9740_VFIFO_RD_CTRL		0x4601
#define OV9740_MIPI_CTRL_3012		0x3012
#define OV9740_SC_CMMM_MIPI_CTR		0x3014

#define OV9740_MAX_WIDTH		1280
#define OV9740_MAX_HEIGHT		720

/* Misc. structures */
struct ov9740_reg {
	u16				reg;
	u8				val;
};

struct ov9740_priv {
	struct v4l2_subdev		subdev;
	struct v4l2_ctrl_handler	hdl;

	int				ident;
	u16				model;
	u8				revision;
	u8				manid;
	u8				smiaver;

	bool				flag_vflip;
	bool				flag_hflip;

	/* For suspend/resume. */
	struct v4l2_mbus_framefmt	current_mf;
	bool				current_enable;
};

static const struct ov9740_reg ov9740_defaults[] = {
	/* Software Reset */
	{ OV9740_SOFTWARE_RESET,	0x01 },

	/* Banding Filter */
	{ OV9740_AEC_B50_STEP_HI,	0x00 },
	{ OV9740_AEC_B50_STEP_LO,	0xe8 },
	{ OV9740_AEC_CTRL0E,		0x03 },
	{ OV9740_AEC_MAXEXPO_50_H,	0x15 },
	{ OV9740_AEC_MAXEXPO_50_L,	0xc6 },
	{ OV9740_AEC_B60_STEP_HI,	0x00 },
	{ OV9740_AEC_B60_STEP_LO,	0xc0 },
	{ OV9740_AEC_CTRL0D,		0x04 },
	{ OV9740_AEC_MAXEXPO_60_H,	0x18 },
	{ OV9740_AEC_MAXEXPO_60_L,	0x20 },

	/* LC */
	{ 0x5842, 0x02 }, { 0x5843, 0x5e }, { 0x5844, 0x04 }, { 0x5845, 0x32 },
	{ 0x5846, 0x03 }, { 0x5847, 0x29 }, { 0x5848, 0x02 }, { 0x5849, 0xcc },

	/* Un-documented OV9740 registers */
	{ 0x5800, 0x29 }, { 0x5801, 0x25 }, { 0x5802, 0x20 }, { 0x5803, 0x21 },
	{ 0x5804, 0x26 }, { 0x5805, 0x2e }, { 0x5806, 0x11 }, { 0x5807, 0x0c },
	{ 0x5808, 0x09 }, { 0x5809, 0x0a }, { 0x580a, 0x0e }, { 0x580b, 0x16 },
	{ 0x580c, 0x06 }, { 0x580d, 0x02 }, { 0x580e, 0x00 }, { 0x580f, 0x00 },
	{ 0x5810, 0x04 }, { 0x5811, 0x0a }, { 0x5812, 0x05 }, { 0x5813, 0x02 },
	{ 0x5814, 0x00 }, { 0x5815, 0x00 }, { 0x5816, 0x03 }, { 0x5817, 0x09 },
	{ 0x5818, 0x0f }, { 0x5819, 0x0a }, { 0x581a, 0x07 }, { 0x581b, 0x08 },
	{ 0x581c, 0x0b }, { 0x581d, 0x14 }, { 0x581e, 0x28 }, { 0x581f, 0x23 },
	{ 0x5820, 0x1d }, { 0x5821, 0x1e }, { 0x5822, 0x24 }, { 0x5823, 0x2a },
	{ 0x5824, 0x4f }, { 0x5825, 0x6f }, { 0x5826, 0x5f }, { 0x5827, 0x7f },
	{ 0x5828, 0x9f }, { 0x5829, 0x5f }, { 0x582a, 0x8f }, { 0x582b, 0x9e },
	{ 0x582c, 0x8f }, { 0x582d, 0x9f }, { 0x582e, 0x4f }, { 0x582f, 0x87 },
	{ 0x5830, 0x86 }, { 0x5831, 0x97 }, { 0x5832, 0xae }, { 0x5833, 0x3f },
	{ 0x5834, 0x8e }, { 0x5835, 0x7c }, { 0x5836, 0x7e }, { 0x5837, 0xaf },
	{ 0x5838, 0x8f }, { 0x5839, 0x8f }, { 0x583a, 0x9f }, { 0x583b, 0x7f },
	{ 0x583c, 0x5f },

	/* Y Gamma */
	{ 0x5480, 0x07 }, { 0x5481, 0x18 }, { 0x5482, 0x2c }, { 0x5483, 0x4e },
	{ 0x5484, 0x5e }, { 0x5485, 0x6b }, { 0x5486, 0x77 }, { 0x5487, 0x82 },
	{ 0x5488, 0x8c }, { 0x5489, 0x95 }, { 0x548a, 0xa4 }, { 0x548b, 0xb1 },
	{ 0x548c, 0xc6 }, { 0x548d, 0xd8 }, { 0x548e, 0xe9 },

	/* UV Gamma */
	{ 0x5490, 0x0f }, { 0x5491, 0xff }, { 0x5492, 0x0d }, { 0x5493, 0x05 },
	{ 0x5494, 0x07 }, { 0x5495, 0x1a }, { 0x5496, 0x04 }, { 0x5497, 0x01 },
	{ 0x5498, 0x03 }, { 0x5499, 0x53 }, { 0x549a, 0x02 }, { 0x549b, 0xeb },
	{ 0x549c, 0x02 }, { 0x549d, 0xa0 }, { 0x549e, 0x02 }, { 0x549f, 0x67 },
	{ 0x54a0, 0x02 }, { 0x54a1, 0x3b }, { 0x54a2, 0x02 }, { 0x54a3, 0x18 },
	{ 0x54a4, 0x01 }, { 0x54a5, 0xe7 }, { 0x54a6, 0x01 }, { 0x54a7, 0xc3 },
	{ 0x54a8, 0x01 }, { 0x54a9, 0x94 }, { 0x54aa, 0x01 }, { 0x54ab, 0x72 },
	{ 0x54ac, 0x01 }, { 0x54ad, 0x57 },

	/* AWB */
	{ OV9740_AWB_CTRL00,		0xf0 },
	{ OV9740_AWB_CTRL01,		0x00 },
	{ OV9740_AWB_CTRL02,		0x41 },
	{ OV9740_AWB_CTRL03,		0x42 },
	{ OV9740_AWB_ADV_CTRL01,	0x8a },
	{ OV9740_AWB_ADV_CTRL02,	0x61 },
	{ OV9740_AWB_ADV_CTRL03,	0xce },
	{ OV9740_AWB_ADV_CTRL04,	0xa8 },
	{ OV9740_AWB_ADV_CTRL05,	0x17 },
	{ OV9740_AWB_ADV_CTRL06,	0x1f },
	{ OV9740_AWB_ADV_CTRL07,	0x27 },
	{ OV9740_AWB_ADV_CTRL08,	0x41 },
	{ OV9740_AWB_ADV_CTRL09,	0x34 },
	{ OV9740_AWB_ADV_CTRL10,	0xf0 },
	{ OV9740_AWB_ADV_CTRL11,	0x10 },
	{ OV9740_AWB_CTRL0F,		0xff },
	{ OV9740_AWB_CTRL10,		0x00 },
	{ OV9740_AWB_CTRL11,		0xff },
	{ OV9740_AWB_CTRL12,		0x00 },
	{ OV9740_AWB_CTRL13,		0xff },
	{ OV9740_AWB_CTRL14,		0x00 },

	/* CIP */
	{ 0x530d, 0x12 },

	/* CMX */
	{ 0x5380, 0x01 }, { 0x5381, 0x00 }, { 0x5382, 0x00 }, { 0x5383, 0x17 },
	{ 0x5384, 0x00 }, { 0x5385, 0x01 }, { 0x5386, 0x00 }, { 0x5387, 0x00 },
	{ 0x5388, 0x00 }, { 0x5389, 0xe0 }, { 0x538a, 0x00 }, { 0x538b, 0x20 },
	{ 0x538c, 0x00 }, { 0x538d, 0x00 }, { 0x538e, 0x00 }, { 0x538f, 0x16 },
	{ 0x5390, 0x00 }, { 0x5391, 0x9c }, { 0x5392, 0x00 }, { 0x5393, 0xa0 },
	{ 0x5394, 0x18 },

	/* 50/60 Detection */
	{ 0x3c0a, 0x9c }, { 0x3c0b, 0x3f },

	/* Output Select */
	{ OV9740_IO_OUTPUT_SEL01,	0x00 },
	{ OV9740_IO_OUTPUT_SEL02,	0x00 },
	{ OV9740_IO_CREL00,		0x00 },
	{ OV9740_IO_CREL01,		0x00 },
	{ OV9740_IO_CREL02,		0x00 },

	/* AWB Control */
	{ OV9740_AWB_MANUAL_CTRL,	0x00 },

	/* Analog Control */
	{ OV9740_ANALOG_CTRL03,		0xaa },
	{ OV9740_ANALOG_CTRL32,		0x2f },
	{ OV9740_ANALOG_CTRL20,		0x66 },
	{ OV9740_ANALOG_CTRL21,		0xc0 },
	{ OV9740_ANALOG_CTRL31,		0x52 },
	{ OV9740_ANALOG_CTRL33,		0x50 },
	{ OV9740_ANALOG_CTRL30,		0xca },
	{ OV9740_ANALOG_CTRL04,		0x0c },
	{ OV9740_ANALOG_CTRL01,		0x40 },
	{ OV9740_ANALOG_CTRL02,		0x16 },
	{ OV9740_ANALOG_CTRL10,		0xa1 },
	{ OV9740_ANALOG_CTRL12,		0x24 },
	{ OV9740_ANALOG_CTRL22,		0x9f },
	{ OV9740_ANALOG_CTRL15,		0xf0 },

	/* Sensor Control */
	{ OV9740_SENSOR_CTRL03,		0x42 },
	{ OV9740_SENSOR_CTRL04,		0x10 },
	{ OV9740_SENSOR_CTRL05,		0x45 },
	{ OV9740_SENSOR_CTRL07,		0x14 },

	/* Timing Control */
	{ OV9740_TIMING_CTRL33,		0x04 },
	{ OV9740_TIMING_CTRL35,		0x02 },
	{ OV9740_TIMING_CTRL19,		0x6e },
	{ OV9740_TIMING_CTRL17,		0x94 },

	/* AEC/AGC Control */
	{ OV9740_AEC_ENABLE,		0x10 },
	{ OV9740_GAIN_CEILING_01,	0x00 },
	{ OV9740_GAIN_CEILING_02,	0x7f },
	{ OV9740_AEC_HI_THRESHOLD,	0xa0 },
	{ OV9740_AEC_3A1A,		0x05 },
	{ OV9740_AEC_CTRL1B_WPT2,	0x50 },
	{ OV9740_AEC_CTRL0F_WPT,	0x50 },
	{ OV9740_AEC_CTRL10_BPT,	0x4c },
	{ OV9740_AEC_CTRL1E_BPT2,	0x4c },
	{ OV9740_AEC_LO_THRESHOLD,	0x26 },

	/* BLC Control */
	{ OV9740_BLC_AUTO_ENABLE,	0x45 },
	{ OV9740_BLC_MODE,		0x18 },

	/* DVP Control */
	{ OV9740_DVP_VSYNC_CTRL02,	0x04 },
	{ OV9740_DVP_VSYNC_MODE,	0x00 },
	{ OV9740_DVP_VSYNC_CTRL06,	0x08 },

	/* PLL Setting */
	{ OV9740_PLL_MODE_CTRL01,	0x20 },
	{ OV9740_PRE_PLL_CLK_DIV,	0x03 },
	{ OV9740_PLL_MULTIPLIER,	0x4c },
	{ OV9740_VT_SYS_CLK_DIV,	0x01 },
	{ OV9740_VT_PIX_CLK_DIV,	0x08 },
	{ OV9740_PLL_CTRL3010,		0x01 },
	{ OV9740_VFIFO_CTRL00,		0x82 },

	/* Timing Setting */
	/* VTS */
	{ OV9740_FRM_LENGTH_LN_HI,	0x03 },
	{ OV9740_FRM_LENGTH_LN_LO,	0x07 },
	/* HTS */
	{ OV9740_LN_LENGTH_PCK_HI,	0x06 },
	{ OV9740_LN_LENGTH_PCK_LO,	0x62 },

	/* MIPI Control */
	{ OV9740_MIPI_CTRL00,		0x44 }, /* 0x64 for discontinuous clk */
	{ OV9740_MIPI_3837,		0x01 },
	{ OV9740_MIPI_CTRL01,		0x0f },
	{ OV9740_MIPI_CTRL03,		0x05 },
	{ OV9740_MIPI_CTRL05,		0x10 },
	{ OV9740_VFIFO_RD_CTRL,		0x16 },
	{ OV9740_MIPI_CTRL_3012,	0x70 },
	{ OV9740_SC_CMMM_MIPI_CTR,	0x01 },

	/* YUYV order */
	{ OV9740_ISP_CTRL19,		0x02 },
};

static enum v4l2_mbus_pixelcode ov9740_codes[] = {
	V4L2_MBUS_FMT_YUYV8_2X8,
};

/* read a register */
static int ov9740_reg_read(struct i2c_client *client, u16 reg, u8 *val)
{
	int ret;
	struct i2c_msg msg[] = {
		{
			.addr	= client->addr,
			.flags	= 0,
			.len	= 2,
			.buf	= (u8 *)&reg,
		},
		{
			.addr	= client->addr,
			.flags	= I2C_M_RD,
			.len	= 1,
			.buf	= val,
		},
	};

	reg = swab16(reg);

	ret = i2c_transfer(client->adapter, msg, 2);
	if (ret < 0) {
		dev_err(&client->dev, "Failed reading register 0x%04x!\n", reg);
		return ret;
	}

	return 0;
}

/* write a register */
static int ov9740_reg_write(struct i2c_client *client, u16 reg, u8 val)
{
	struct i2c_msg msg;
	struct {
		u16 reg;
		u8 val;
	} __packed buf;
	int ret;

	reg = swab16(reg);

	buf.reg = reg;
	buf.val = val;

	msg.addr	= client->addr;
	msg.flags	= 0;
	msg.len		= 3;
	msg.buf		= (u8 *)&buf;

	ret = i2c_transfer(client->adapter, &msg, 1);
	if (ret < 0) {
		dev_err(&client->dev, "Failed writing register 0x%04x!\n", reg);
		return ret;
	}

	return 0;
}


/* Read a register, alter its bits, write it back */
static int ov9740_reg_rmw(struct i2c_client *client, u16 reg, u8 set, u8 unset)
{
	u8 val;
	int ret;

	ret = ov9740_reg_read(client, reg, &val);
	if (ret < 0) {
		dev_err(&client->dev,
			"[Read]-Modify-Write of register 0x%04x failed!\n",
			reg);
		return ret;
	}

	val |= set;
	val &= ~unset;

	ret = ov9740_reg_write(client, reg, val);
	if (ret < 0) {
		dev_err(&client->dev,
			"Read-Modify-[Write] of register 0x%04x failed!\n",
			reg);
		return ret;
	}

	return 0;
}

static int ov9740_reg_write_array(struct i2c_client *client,
				  const struct ov9740_reg *regarray,
				  int regarraylen)
{
	int i;
	int ret;

	for (i = 0; i < regarraylen; i++) {
		ret = ov9740_reg_write(client,
				       regarray[i].reg, regarray[i].val);
		if (ret < 0)
			return ret;
	}

	return 0;
}

/* Start/Stop streaming from the device */
static int ov9740_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov9740_priv *priv = to_ov9740(sd);
	int ret;

	/* Program orientation register. */
	if (priv->flag_vflip)
		ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x2, 0);
	else
		ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x2);
	if (ret < 0)
		return ret;

	if (priv->flag_hflip)
		ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0x1, 0);
	else
		ret = ov9740_reg_rmw(client, OV9740_IMAGE_ORT, 0, 0x1);
	if (ret < 0)
		return ret;

	if (enable) {
		dev_dbg(&client->dev, "Enabling Streaming\n");
		/* Start Streaming */
		ret = ov9740_reg_write(client, OV9740_MODE_SELECT, 0x01);

	} else {
		dev_dbg(&client->dev, "Disabling Streaming\n");
		/* Software Reset */
		ret = ov9740_reg_write(client, OV9740_SOFTWARE_RESET, 0x01);
		if (!ret)
			/* Setting Streaming to Standby */
			ret = ov9740_reg_write(client, OV9740_MODE_SELECT,
					       0x00);
	}

	priv->current_enable = enable;

	return ret;
}

/* select nearest higher resolution for capture */
static void ov9740_res_roundup(u32 *width, u32 *height)
{
	/* Width must be a multiple of 4 pixels. */
	*width = ALIGN(*width, 4);

	/* Max resolution is 1280x720 (720p). */
	if (*width > OV9740_MAX_WIDTH)
		*width = OV9740_MAX_WIDTH;

	if (*height > OV9740_MAX_HEIGHT)
		*height = OV9740_MAX_HEIGHT;
}

/* Setup registers according to resolution and color encoding */
static int ov9740_set_res(struct i2c_client *client, u32 width, u32 height)
{
	u32 x_start;
	u32 y_start;
	u32 x_end;
	u32 y_end;
	bool scaling = 0;
	u32 scale_input_x;
	u32 scale_input_y;
	int ret;

	if ((width != OV9740_MAX_WIDTH) || (height != OV9740_MAX_HEIGHT))
		scaling = 1;

	/*
	 * Try to use as much of the sensor area as possible when supporting
	 * smaller resolutions.  Depending on the aspect ratio of the
	 * chosen resolution, we can either use the full width of the sensor,
	 * or the full height of the sensor (or both if the aspect ratio is
	 * the same as 1280x720.
	 */
	if ((OV9740_MAX_WIDTH * height) > (OV9740_MAX_HEIGHT * width)) {
		scale_input_x = (OV9740_MAX_HEIGHT * width) / height;
		scale_input_y = OV9740_MAX_HEIGHT;
	} else {
		scale_input_x = OV9740_MAX_WIDTH;
		scale_input_y = (OV9740_MAX_WIDTH * height) / width;
	}

	/* These describe the area of the sensor to use. */
	x_start = (OV9740_MAX_WIDTH - scale_input_x) / 2;
	y_start = (OV9740_MAX_HEIGHT - scale_input_y) / 2;
	x_end = x_start + scale_input_x - 1;
	y_end = y_start + scale_input_y - 1;

	ret = ov9740_reg_write(client, OV9740_X_ADDR_START_HI, x_start >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_X_ADDR_START_LO, x_start & 0xff);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_HI, y_start >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_LO, y_start & 0xff);
	if (ret)
		goto done;

	ret = ov9740_reg_write(client, OV9740_X_ADDR_END_HI, x_end >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_X_ADDR_END_LO, x_end & 0xff);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_HI, y_end >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_LO, y_end & 0xff);
	if (ret)
		goto done;

	ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_HI, width >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_LO, width & 0xff);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_HI, height >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_LO, height & 0xff);
	if (ret)
		goto done;

	ret = ov9740_reg_write(client, OV9740_ISP_CTRL1E, scale_input_x >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_ISP_CTRL1F, scale_input_x & 0xff);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_ISP_CTRL20, scale_input_y >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_ISP_CTRL21, scale_input_y & 0xff);
	if (ret)
		goto done;

	ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_HI,
			       (scale_input_x - width) >> 8);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_LO,
			       (scale_input_x - width) & 0xff);
	if (ret)
		goto done;

	ret = ov9740_reg_write(client, OV9740_ISP_CTRL00, 0xff);
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_ISP_CTRL01, 0xef |
							  (scaling << 4));
	if (ret)
		goto done;
	ret = ov9740_reg_write(client, OV9740_ISP_CTRL03, 0xff);

done:
	return ret;
}

/* set the format we will capture in */
static int ov9740_s_fmt(struct v4l2_subdev *sd,
			struct v4l2_mbus_framefmt *mf)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ov9740_priv *priv = to_ov9740(sd);
	enum v4l2_colorspace cspace;
	enum v4l2_mbus_pixelcode code = mf->code;
	int ret;

	ov9740_res_roundup(&mf->width, &mf->height);

	switch (code) {
	case V4L2_MBUS_FMT_YUYV8_2X8:
		cspace = V4L2_COLORSPACE_SRGB;
		break;
	default:
		return -EINVAL;
	}

	ret = ov9740_reg_write_array(client, ov9740_defaults,
				     ARRAY_SIZE(ov9740_defaults));
	if (ret < 0)
		return ret;

	ret = ov9740_set_res(client, mf->width, mf->height);
	if (ret < 0)
		return ret;

	mf->code	= code;
	mf->colorspace	= cspace;

	memcpy(&priv->current_mf, mf, sizeof(struct v4l2_mbus_framefmt));

	return ret;
}

static int ov9740_try_fmt(struct v4l2_subdev *sd,
			  struct v4l2_mbus_framefmt *mf)
{
	ov9740_res_roundup(&mf->width, &mf->height);

	mf->field = V4L2_FIELD_NONE;
	mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
	mf->colorspace = V4L2_COLORSPACE_SRGB;

	return 0;
}

static int ov9740_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
			   enum v4l2_mbus_pixelcode *code)
{
	if (index >= ARRAY_SIZE(ov9740_codes))
		return -EINVAL;

	*code = ov9740_codes[index];

	return 0;
}

static int ov9740_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
	a->bounds.left		= 0;
	a->bounds.top		= 0;
	a->bounds.width		= OV9740_MAX_WIDTH;
	a->bounds.height	= OV9740_MAX_HEIGHT;
	a->defrect		= a->bounds;
	a->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE;
	a->pixelaspect.numerator	= 1;
	a->pixelaspect.denominator	= 1;

	return 0;
}

static int ov9740_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
	a->c.left		= 0;
	a->c.top		= 0;
	a->c.width		= OV9740_MAX_WIDTH;
	a->c.height		= OV9740_MAX_HEIGHT;
	a->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE;

	return 0;
}

/* Set status of additional camera capabilities */
static int ov9740_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct ov9740_priv *priv =
		container_of(ctrl->handler, struct ov9740_priv, hdl);

	switch (ctrl->id) {
	case V4L2_CID_VFLIP:
		priv->flag_vflip = ctrl->val;
		break;
	case V4L2_CID_HFLIP:
		priv->flag_hflip = ctrl->val;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

/* Get chip identification */
static int ov9740_g_chip_ident(struct v4l2_subdev *sd,
			       struct v4l2_dbg_chip_ident *id)
{
	struct ov9740_priv *priv = to_ov9740(sd);

	id->ident = priv->ident;
	id->revision = priv->revision;

	return 0;
}

static int ov9740_s_power(struct v4l2_subdev *sd, int on)
{
	struct ov9740_priv *priv = to_ov9740(sd);

	if (!priv->current_enable)
		return 0;

	if (on) {
		ov9740_s_fmt(sd, &priv->current_mf);
		ov9740_s_stream(sd, priv->current_enable);
	} else {
		ov9740_s_stream(sd, 0);
		priv->current_enable = true;
	}

	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov9740_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 = 2;

	ret = ov9740_reg_read(client, reg->reg, &val);
	if (ret)
		return ret;

	reg->val = (__u64)val;

	return ret;
}

static int ov9740_set_register(struct v4l2_subdev *sd,
			       struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

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

	return ov9740_reg_write(client, reg->reg, reg->val);
}
#endif

static int ov9740_video_probe(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct ov9740_priv *priv = to_ov9740(sd);
	u8 modelhi, modello;
	int ret;

	/*
	 * check and show product ID and manufacturer ID
	 */
	ret = ov9740_reg_read(client, OV9740_MODEL_ID_HI, &modelhi);
	if (ret < 0)
		goto err;

	ret = ov9740_reg_read(client, OV9740_MODEL_ID_LO, &modello);
	if (ret < 0)
		goto err;

	priv->model = (modelhi << 8) | modello;

	ret = ov9740_reg_read(client, OV9740_REVISION_NUMBER, &priv->revision);
	if (ret < 0)
		goto err;

	ret = ov9740_reg_read(client, OV9740_MANUFACTURER_ID, &priv->manid);
	if (ret < 0)
		goto err;

	ret = ov9740_reg_read(client, OV9740_SMIA_VERSION, &priv->smiaver);
	if (ret < 0)
		goto err;

	if (priv->model != 0x9740) {
		ret = -ENODEV;
		goto err;
	}

	priv->ident = V4L2_IDENT_OV9740;

	dev_info(&client->dev, "ov9740 Model ID 0x%04x, Revision 0x%02x, "
		 "Manufacturer 0x%02x, SMIA Version 0x%02x\n",
		 priv->model, priv->revision, priv->manid, priv->smiaver);

err:
	return ret;
}

/* Request bus settings on camera side */
static int ov9740_g_mbus_config(struct v4l2_subdev *sd,
				struct v4l2_mbus_config *cfg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);

	cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
		V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
		V4L2_MBUS_DATA_ACTIVE_HIGH;
	cfg->type = V4L2_MBUS_PARALLEL;
	cfg->flags = soc_camera_apply_board_flags(icl, cfg);

	return 0;
}

static struct v4l2_subdev_video_ops ov9740_video_ops = {
	.s_stream	= ov9740_s_stream,
	.s_mbus_fmt	= ov9740_s_fmt,
	.try_mbus_fmt	= ov9740_try_fmt,
	.enum_mbus_fmt	= ov9740_enum_fmt,
	.cropcap	= ov9740_cropcap,
	.g_crop		= ov9740_g_crop,
	.g_mbus_config	= ov9740_g_mbus_config,
};

static struct v4l2_subdev_core_ops ov9740_core_ops = {
	.g_chip_ident		= ov9740_g_chip_ident,
	.s_power		= ov9740_s_power,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register		= ov9740_get_register,
	.s_register		= ov9740_set_register,
#endif
};

static struct v4l2_subdev_ops ov9740_subdev_ops = {
	.core			= &ov9740_core_ops,
	.video			= &ov9740_video_ops,
};

static const struct v4l2_ctrl_ops ov9740_ctrl_ops = {
	.s_ctrl = ov9740_s_ctrl,
};

/*
 * i2c_driver function
 */
static int ov9740_probe(struct i2c_client *client,
			const struct i2c_device_id *did)
{
	struct ov9740_priv *priv;
	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
	int ret;

	if (!icl) {
		dev_err(&client->dev, "Missing platform_data for driver\n");
		return -EINVAL;
	}

	priv = kzalloc(sizeof(struct ov9740_priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&client->dev, "Failed to allocate private data!\n");
		return -ENOMEM;
	}

	v4l2_i2c_subdev_init(&priv->subdev, client, &ov9740_subdev_ops);
	v4l2_ctrl_handler_init(&priv->hdl, 13);
	v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
			V4L2_CID_VFLIP, 0, 1, 1, 0);
	v4l2_ctrl_new_std(&priv->hdl, &ov9740_ctrl_ops,
			V4L2_CID_HFLIP, 0, 1, 1, 0);
	priv->subdev.ctrl_handler = &priv->hdl;
	if (priv->hdl.error) {
		int err = priv->hdl.error;

		kfree(priv);
		return err;
	}

	ret = ov9740_video_probe(client);
	if (!ret)
		ret = v4l2_ctrl_handler_setup(&priv->hdl);
	if (ret < 0) {
		v4l2_ctrl_handler_free(&priv->hdl);
		kfree(priv);
	}

	return ret;
}

static int ov9740_remove(struct i2c_client *client)
{
	struct ov9740_priv *priv = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(&priv->subdev);
	v4l2_ctrl_handler_free(&priv->hdl);
	kfree(priv);
	return 0;
}

static const struct i2c_device_id ov9740_id[] = {
	{ "ov9740", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ov9740_id);

static struct i2c_driver ov9740_i2c_driver = {
	.driver = {
		.name = "ov9740",
	},
	.probe    = ov9740_probe,
	.remove   = ov9740_remove,
	.id_table = ov9740_id,
};

static int __init ov9740_module_init(void)
{
	return i2c_add_driver(&ov9740_i2c_driver);
}

static void __exit ov9740_module_exit(void)
{
	i2c_del_driver(&ov9740_i2c_driver);
}

module_init(ov9740_module_init);
module_exit(ov9740_module_exit);

MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV9740");
MODULE_AUTHOR("Andrew Chew <achew@nvidia.com>");
MODULE_LICENSE("GPL v2");