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
|
/*
* V4L2 SoC Camera driver for OmniVision OV6650 Camera Sensor
*
* Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
*
* Based on OmniVision OV96xx Camera Driver
* Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
*
* Based on ov772x camera driver:
* Copyright (C) 2008 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* Based on ov7670 and soc_camera_platform driver,
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* Hardware specific bits initialy based on former work by Matt Callow
* drivers/media/video/omap/sensor_ov6650.c
* Copyright (C) 2006 Matt Callow
*
* 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/slab.h>
#include <media/soc_camera.h>
#include <media/soc_mediabus.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
/* Register definitions */
#define REG_GAIN 0x00 /* range 00 - 3F */
#define REG_BLUE 0x01
#define REG_RED 0x02
#define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
#define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
#define REG_BRT 0x06
#define REG_PIDH 0x0a
#define REG_PIDL 0x0b
#define REG_AECH 0x10
#define REG_CLKRC 0x11 /* Data Format and Internal Clock */
/* [7:6] Input system clock (MHz)*/
/* 00=8, 01=12, 10=16, 11=24 */
/* [5:0]: Internal Clock Pre-Scaler */
#define REG_COMA 0x12 /* [7] Reset */
#define REG_COMB 0x13
#define REG_COMC 0x14
#define REG_COMD 0x15
#define REG_COML 0x16
#define REG_HSTRT 0x17
#define REG_HSTOP 0x18
#define REG_VSTRT 0x19
#define REG_VSTOP 0x1a
#define REG_PSHFT 0x1b
#define REG_MIDH 0x1c
#define REG_MIDL 0x1d
#define REG_HSYNS 0x1e
#define REG_HSYNE 0x1f
#define REG_COME 0x20
#define REG_YOFF 0x21
#define REG_UOFF 0x22
#define REG_VOFF 0x23
#define REG_AEW 0x24
#define REG_AEB 0x25
#define REG_COMF 0x26
#define REG_COMG 0x27
#define REG_COMH 0x28
#define REG_COMI 0x29
#define REG_FRARL 0x2b
#define REG_COMJ 0x2c
#define REG_COMK 0x2d
#define REG_AVGY 0x2e
#define REG_REF0 0x2f
#define REG_REF1 0x30
#define REG_REF2 0x31
#define REG_FRAJH 0x32
#define REG_FRAJL 0x33
#define REG_FACT 0x34
#define REG_L1AEC 0x35
#define REG_AVGU 0x36
#define REG_AVGV 0x37
#define REG_SPCB 0x60
#define REG_SPCC 0x61
#define REG_GAM1 0x62
#define REG_GAM2 0x63
#define REG_GAM3 0x64
#define REG_SPCD 0x65
#define REG_SPCE 0x68
#define REG_ADCL 0x69
#define REG_RMCO 0x6c
#define REG_GMCO 0x6d
#define REG_BMCO 0x6e
/* Register bits, values, etc. */
#define OV6650_PIDH 0x66 /* high byte of product ID number */
#define OV6650_PIDL 0x50 /* low byte of product ID number */
#define OV6650_MIDH 0x7F /* high byte of mfg ID */
#define OV6650_MIDL 0xA2 /* low byte of mfg ID */
#define DEF_GAIN 0x00
#define DEF_BLUE 0x80
#define DEF_RED 0x80
#define SAT_SHIFT 4
#define SAT_MASK (0xf << SAT_SHIFT)
#define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
#define HUE_EN BIT(5)
#define HUE_MASK 0x1f
#define DEF_HUE 0x10
#define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
#define DEF_AECH 0x4D
#define CLKRC_6MHz 0x00
#define CLKRC_12MHz 0x40
#define CLKRC_16MHz 0x80
#define CLKRC_24MHz 0xc0
#define CLKRC_DIV_MASK 0x3f
#define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
#define COMA_RESET BIT(7)
#define COMA_QCIF BIT(5)
#define COMA_RAW_RGB BIT(4)
#define COMA_RGB BIT(3)
#define COMA_BW BIT(2)
#define COMA_WORD_SWAP BIT(1)
#define COMA_BYTE_SWAP BIT(0)
#define DEF_COMA 0x00
#define COMB_FLIP_V BIT(7)
#define COMB_FLIP_H BIT(5)
#define COMB_BAND_FILTER BIT(4)
#define COMB_AWB BIT(2)
#define COMB_AGC BIT(1)
#define COMB_AEC BIT(0)
#define DEF_COMB 0x5f
#define COML_ONE_CHANNEL BIT(7)
#define DEF_HSTRT 0x24
#define DEF_HSTOP 0xd4
#define DEF_VSTRT 0x04
#define DEF_VSTOP 0x94
#define COMF_HREF_LOW BIT(4)
#define COMJ_PCLK_RISING BIT(4)
#define COMJ_VSYNC_HIGH BIT(0)
/* supported resolutions */
#define W_QCIF (DEF_HSTOP - DEF_HSTRT)
#define W_CIF (W_QCIF << 1)
#define H_QCIF (DEF_VSTOP - DEF_VSTRT)
#define H_CIF (H_QCIF << 1)
#define FRAME_RATE_MAX 30
struct ov6650_reg {
u8 reg;
u8 val;
};
struct ov6650 {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
struct {
/* exposure/autoexposure cluster */
struct v4l2_ctrl *autoexposure;
struct v4l2_ctrl *exposure;
};
struct {
/* gain/autogain cluster */
struct v4l2_ctrl *autogain;
struct v4l2_ctrl *gain;
};
struct {
/* blue/red/autowhitebalance cluster */
struct v4l2_ctrl *autowb;
struct v4l2_ctrl *blue;
struct v4l2_ctrl *red;
};
bool half_scale; /* scale down output by 2 */
struct v4l2_rect rect; /* sensor cropping window */
unsigned long pclk_limit; /* from host */
unsigned long pclk_max; /* from resolution and format */
struct v4l2_fract tpf; /* as requested with s_parm */
enum v4l2_mbus_pixelcode code;
enum v4l2_colorspace colorspace;
};
static enum v4l2_mbus_pixelcode ov6650_codes[] = {
V4L2_MBUS_FMT_YUYV8_2X8,
V4L2_MBUS_FMT_UYVY8_2X8,
V4L2_MBUS_FMT_YVYU8_2X8,
V4L2_MBUS_FMT_VYUY8_2X8,
V4L2_MBUS_FMT_SBGGR8_1X8,
V4L2_MBUS_FMT_Y8_1X8,
};
/* read a register */
static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
{
int ret;
u8 data = reg;
struct i2c_msg msg = {
.addr = client->addr,
.flags = 0,
.len = 1,
.buf = &data,
};
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0)
goto err;
msg.flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0)
goto err;
*val = data;
return 0;
err:
dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
return ret;
}
/* write a register */
static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
{
int ret;
unsigned char data[2] = { reg, val };
struct i2c_msg msg = {
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = data,
};
ret = i2c_transfer(client->adapter, &msg, 1);
udelay(100);
if (ret < 0) {
dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
return ret;
}
return 0;
}
/* Read a register, alter its bits, write it back */
static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
{
u8 val;
int ret;
ret = ov6650_reg_read(client, reg, &val);
if (ret) {
dev_err(&client->dev,
"[Read]-Modify-Write of register 0x%02x failed!\n",
reg);
return ret;
}
val &= ~mask;
val |= set;
ret = ov6650_reg_write(client, reg, val);
if (ret)
dev_err(&client->dev,
"Read-Modify-[Write] of register 0x%02x failed!\n",
reg);
return ret;
}
static struct ov6650 *to_ov6650(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
}
/* Start/Stop streaming from the device */
static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
{
return 0;
}
/* Get status of additional camera capabilities */
static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
struct v4l2_subdev *sd = &priv->subdev;
struct i2c_client *client = v4l2_get_subdevdata(sd);
uint8_t reg, reg2;
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_AUTOGAIN:
ret = ov6650_reg_read(client, REG_GAIN, ®);
if (!ret)
priv->gain->val = reg;
return ret;
case V4L2_CID_AUTO_WHITE_BALANCE:
ret = ov6650_reg_read(client, REG_BLUE, ®);
if (!ret)
ret = ov6650_reg_read(client, REG_RED, ®2);
if (!ret) {
priv->blue->val = reg;
priv->red->val = reg2;
}
return ret;
case V4L2_CID_EXPOSURE_AUTO:
ret = ov6650_reg_read(client, REG_AECH, ®);
if (!ret)
priv->exposure->val = reg;
return ret;
}
return -EINVAL;
}
/* Set status of additional camera capabilities */
static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
struct v4l2_subdev *sd = &priv->subdev;
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_AUTOGAIN:
ret = ov6650_reg_rmw(client, REG_COMB,
ctrl->val ? COMB_AGC : 0, COMB_AGC);
if (!ret && !ctrl->val)
ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val);
return ret;
case V4L2_CID_AUTO_WHITE_BALANCE:
ret = ov6650_reg_rmw(client, REG_COMB,
ctrl->val ? COMB_AWB : 0, COMB_AWB);
if (!ret && !ctrl->val) {
ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val);
if (!ret)
ret = ov6650_reg_write(client, REG_RED,
priv->red->val);
}
return ret;
case V4L2_CID_SATURATION:
return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val),
SAT_MASK);
case V4L2_CID_HUE:
return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val),
HUE_MASK);
case V4L2_CID_BRIGHTNESS:
return ov6650_reg_write(client, REG_BRT, ctrl->val);
case V4L2_CID_EXPOSURE_AUTO:
if (ctrl->val == V4L2_EXPOSURE_AUTO)
ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0);
else
ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC);
if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL)
ret = ov6650_reg_write(client, REG_AECH,
priv->exposure->val);
return ret;
case V4L2_CID_GAMMA:
return ov6650_reg_write(client, REG_GAM1, ctrl->val);
case V4L2_CID_VFLIP:
return ov6650_reg_rmw(client, REG_COMB,
ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V);
case V4L2_CID_HFLIP:
return ov6650_reg_rmw(client, REG_COMB,
ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H);
}
return -EINVAL;
}
/* Get chip identification */
static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
id->ident = V4L2_IDENT_OV6650;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov6650_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 & ~0xff)
return -EINVAL;
reg->size = 1;
ret = ov6650_reg_read(client, reg->reg, &val);
if (!ret)
reg->val = (__u64)val;
return ret;
}
static int ov6650_set_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (reg->reg & ~0xff || reg->val & ~0xff)
return -EINVAL;
return ov6650_reg_write(client, reg->reg, reg->val);
}
#endif
static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->c = priv->rect;
return 0;
}
static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
struct v4l2_rect *rect = &a->c;
int ret;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
rect->left = ALIGN(rect->left, 2);
rect->width = ALIGN(rect->width, 2);
rect->top = ALIGN(rect->top, 2);
rect->height = ALIGN(rect->height, 2);
soc_camera_limit_side(&rect->left, &rect->width,
DEF_HSTRT << 1, 2, W_CIF);
soc_camera_limit_side(&rect->top, &rect->height,
DEF_VSTRT << 1, 2, H_CIF);
ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
if (!ret) {
priv->rect.left = rect->left;
ret = ov6650_reg_write(client, REG_HSTOP,
(rect->left + rect->width) >> 1);
}
if (!ret) {
priv->rect.width = rect->width;
ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
}
if (!ret) {
priv->rect.top = rect->top;
ret = ov6650_reg_write(client, REG_VSTOP,
(rect->top + rect->height) >> 1);
}
if (!ret)
priv->rect.height = rect->height;
return ret;
}
static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
a->bounds.left = DEF_HSTRT << 1;
a->bounds.top = DEF_VSTRT << 1;
a->bounds.width = W_CIF;
a->bounds.height = H_CIF;
a->defrect = a->bounds;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int ov6650_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
mf->width = priv->rect.width >> priv->half_scale;
mf->height = priv->rect.height >> priv->half_scale;
mf->code = priv->code;
mf->colorspace = priv->colorspace;
mf->field = V4L2_FIELD_NONE;
return 0;
}
static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
{
return width > rect->width >> 1 || height > rect->height >> 1;
}
static u8 to_clkrc(struct v4l2_fract *timeperframe,
unsigned long pclk_limit, unsigned long pclk_max)
{
unsigned long pclk;
if (timeperframe->numerator && timeperframe->denominator)
pclk = pclk_max * timeperframe->denominator /
(FRAME_RATE_MAX * timeperframe->numerator);
else
pclk = pclk_max;
if (pclk_limit && pclk_limit < pclk)
pclk = pclk_limit;
return (pclk_max - 1) / pclk;
}
/* set the format we will capture in */
static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_device *icd = (struct soc_camera_device *)sd->grp_id;
struct soc_camera_sense *sense = icd->sense;
struct ov6650 *priv = to_ov6650(client);
bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
struct v4l2_crop a = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.c = {
.left = priv->rect.left + (priv->rect.width >> 1) -
(mf->width >> (1 - half_scale)),
.top = priv->rect.top + (priv->rect.height >> 1) -
(mf->height >> (1 - half_scale)),
.width = mf->width << half_scale,
.height = mf->height << half_scale,
},
};
enum v4l2_mbus_pixelcode code = mf->code;
unsigned long mclk, pclk;
u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
int ret;
/* select color matrix configuration for given color encoding */
switch (code) {
case V4L2_MBUS_FMT_Y8_1X8:
dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
coma_set |= COMA_BW;
break;
case V4L2_MBUS_FMT_YUYV8_2X8:
dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
coma_set |= COMA_WORD_SWAP;
break;
case V4L2_MBUS_FMT_YVYU8_2X8:
dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
COMA_BYTE_SWAP;
break;
case V4L2_MBUS_FMT_UYVY8_2X8:
dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
if (half_scale) {
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
coma_set |= COMA_BYTE_SWAP;
} else {
coma_mask |= COMA_RGB | COMA_BW;
coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
}
break;
case V4L2_MBUS_FMT_VYUY8_2X8:
dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
if (half_scale) {
coma_mask |= COMA_RGB | COMA_BW;
coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
} else {
coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
coma_set |= COMA_BYTE_SWAP;
}
break;
case V4L2_MBUS_FMT_SBGGR8_1X8:
dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
coma_set |= COMA_RAW_RGB | COMA_RGB;
break;
default:
dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
return -EINVAL;
}
priv->code = code;
if (code == V4L2_MBUS_FMT_Y8_1X8 ||
code == V4L2_MBUS_FMT_SBGGR8_1X8) {
coml_mask = COML_ONE_CHANNEL;
coml_set = 0;
priv->pclk_max = 4000000;
} else {
coml_mask = 0;
coml_set = COML_ONE_CHANNEL;
priv->pclk_max = 8000000;
}
if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
priv->colorspace = V4L2_COLORSPACE_SRGB;
else if (code != 0)
priv->colorspace = V4L2_COLORSPACE_JPEG;
if (half_scale) {
dev_dbg(&client->dev, "max resolution: QCIF\n");
coma_set |= COMA_QCIF;
priv->pclk_max /= 2;
} else {
dev_dbg(&client->dev, "max resolution: CIF\n");
coma_mask |= COMA_QCIF;
}
priv->half_scale = half_scale;
if (sense) {
if (sense->master_clock == 8000000) {
dev_dbg(&client->dev, "8MHz input clock\n");
clkrc = CLKRC_6MHz;
} else if (sense->master_clock == 12000000) {
dev_dbg(&client->dev, "12MHz input clock\n");
clkrc = CLKRC_12MHz;
} else if (sense->master_clock == 16000000) {
dev_dbg(&client->dev, "16MHz input clock\n");
clkrc = CLKRC_16MHz;
} else if (sense->master_clock == 24000000) {
dev_dbg(&client->dev, "24MHz input clock\n");
clkrc = CLKRC_24MHz;
} else {
dev_err(&client->dev,
"unspported input clock, check platform data\n");
return -EINVAL;
}
mclk = sense->master_clock;
priv->pclk_limit = sense->pixel_clock_max;
} else {
clkrc = CLKRC_24MHz;
mclk = 24000000;
priv->pclk_limit = 0;
dev_dbg(&client->dev, "using default 24MHz input clock\n");
}
clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
mclk / pclk, 10 * mclk % pclk / pclk);
ret = ov6650_s_crop(sd, &a);
if (!ret)
ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
if (!ret)
ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
if (!ret)
ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
if (!ret) {
mf->colorspace = priv->colorspace;
mf->width = priv->rect.width >> half_scale;
mf->height = priv->rect.height >> half_scale;
}
return ret;
}
static int ov6650_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
&mf->height, 2, H_CIF, 1, 0);
mf->field = V4L2_FIELD_NONE;
switch (mf->code) {
case V4L2_MBUS_FMT_Y10_1X10:
mf->code = V4L2_MBUS_FMT_Y8_1X8;
case V4L2_MBUS_FMT_Y8_1X8:
case V4L2_MBUS_FMT_YVYU8_2X8:
case V4L2_MBUS_FMT_YUYV8_2X8:
case V4L2_MBUS_FMT_VYUY8_2X8:
case V4L2_MBUS_FMT_UYVY8_2X8:
mf->colorspace = V4L2_COLORSPACE_JPEG;
break;
default:
mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
case V4L2_MBUS_FMT_SBGGR8_1X8:
mf->colorspace = V4L2_COLORSPACE_SRGB;
break;
}
return 0;
}
static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
enum v4l2_mbus_pixelcode *code)
{
if (index >= ARRAY_SIZE(ov6650_codes))
return -EINVAL;
*code = ov6650_codes[index];
return 0;
}
static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
struct v4l2_captureparm *cp = &parms->parm.capture;
if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
memset(cp, 0, sizeof(*cp));
cp->capability = V4L2_CAP_TIMEPERFRAME;
cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
priv->pclk_limit, priv->pclk_max));
cp->timeperframe.denominator = FRAME_RATE_MAX;
dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
cp->timeperframe.numerator, cp->timeperframe.denominator);
return 0;
}
static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
struct v4l2_captureparm *cp = &parms->parm.capture;
struct v4l2_fract *tpf = &cp->timeperframe;
int div, ret;
u8 clkrc;
if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (cp->extendedmode != 0)
return -EINVAL;
if (tpf->numerator == 0 || tpf->denominator == 0)
div = 1; /* Reset to full rate */
else
div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
if (div == 0)
div = 1;
else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
/*
* Keep result to be used as tpf limit
* for subseqent clock divider calculations
*/
priv->tpf.numerator = div;
priv->tpf.denominator = FRAME_RATE_MAX;
clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
if (!ret) {
tpf->numerator = GET_CLKRC_DIV(clkrc);
tpf->denominator = FRAME_RATE_MAX;
}
return ret;
}
/* Soft reset the camera. This has nothing to do with the RESET pin! */
static int ov6650_reset(struct i2c_client *client)
{
int ret;
dev_dbg(&client->dev, "reset\n");
ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
if (ret)
dev_err(&client->dev,
"An error occurred while entering soft reset!\n");
return ret;
}
/* program default register values */
static int ov6650_prog_dflt(struct i2c_client *client)
{
int ret;
dev_dbg(&client->dev, "initializing\n");
ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
if (!ret)
ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
return ret;
}
static int ov6650_video_probe(struct i2c_client *client)
{
u8 pidh, pidl, midh, midl;
int ret = 0;
/*
* check and show product ID and manufacturer ID
*/
ret = ov6650_reg_read(client, REG_PIDH, &pidh);
if (!ret)
ret = ov6650_reg_read(client, REG_PIDL, &pidl);
if (!ret)
ret = ov6650_reg_read(client, REG_MIDH, &midh);
if (!ret)
ret = ov6650_reg_read(client, REG_MIDL, &midl);
if (ret)
return ret;
if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
pidh, pidl);
return -ENODEV;
}
dev_info(&client->dev,
"ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
pidh, pidl, midh, midl);
ret = ov6650_reset(client);
if (!ret)
ret = ov6650_prog_dflt(client);
return ret;
}
static const struct v4l2_ctrl_ops ov6550_ctrl_ops = {
.g_volatile_ctrl = ov6550_g_volatile_ctrl,
.s_ctrl = ov6550_s_ctrl,
};
static struct v4l2_subdev_core_ops ov6650_core_ops = {
.g_chip_ident = ov6650_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov6650_get_register,
.s_register = ov6650_set_register,
#endif
};
/* Request bus settings on camera side */
static int ov6650_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_MASTER |
V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
V4L2_MBUS_DATA_ACTIVE_HIGH;
cfg->type = V4L2_MBUS_PARALLEL;
cfg->flags = soc_camera_apply_board_flags(icl, cfg);
return 0;
}
/* Alter bus settings on camera side */
static int ov6650_s_mbus_config(struct v4l2_subdev *sd,
const struct v4l2_mbus_config *cfg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
int ret;
if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
else
ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
if (ret)
return ret;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
else
ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
if (ret)
return ret;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
else
ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
return ret;
}
static struct v4l2_subdev_video_ops ov6650_video_ops = {
.s_stream = ov6650_s_stream,
.g_mbus_fmt = ov6650_g_fmt,
.s_mbus_fmt = ov6650_s_fmt,
.try_mbus_fmt = ov6650_try_fmt,
.enum_mbus_fmt = ov6650_enum_fmt,
.cropcap = ov6650_cropcap,
.g_crop = ov6650_g_crop,
.s_crop = ov6650_s_crop,
.g_parm = ov6650_g_parm,
.s_parm = ov6650_s_parm,
.g_mbus_config = ov6650_g_mbus_config,
.s_mbus_config = ov6650_s_mbus_config,
};
static struct v4l2_subdev_ops ov6650_subdev_ops = {
.core = &ov6650_core_ops,
.video = &ov6650_video_ops,
};
/*
* i2c_driver function
*/
static int ov6650_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov6650 *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(*priv), GFP_KERNEL);
if (!priv) {
dev_err(&client->dev,
"Failed to allocate memory for private data!\n");
return -ENOMEM;
}
v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
v4l2_ctrl_handler_init(&priv->hdl, 13);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN);
priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE);
priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_SATURATION, 0, 0xf, 1, 0x8);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80);
priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl,
&ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
V4L2_EXPOSURE_AUTO);
priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH);
v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
priv->subdev.ctrl_handler = &priv->hdl;
if (priv->hdl.error) {
int err = priv->hdl.error;
kfree(priv);
return err;
}
v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
v4l2_ctrl_auto_cluster(2, &priv->autoexposure,
V4L2_EXPOSURE_MANUAL, true);
priv->rect.left = DEF_HSTRT << 1;
priv->rect.top = DEF_VSTRT << 1;
priv->rect.width = W_CIF;
priv->rect.height = H_CIF;
priv->half_scale = false;
priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
priv->colorspace = V4L2_COLORSPACE_JPEG;
ret = ov6650_video_probe(client);
if (!ret)
ret = v4l2_ctrl_handler_setup(&priv->hdl);
if (ret) {
v4l2_ctrl_handler_free(&priv->hdl);
kfree(priv);
}
return ret;
}
static int ov6650_remove(struct i2c_client *client)
{
struct ov6650 *priv = to_ov6650(client);
v4l2_device_unregister_subdev(&priv->subdev);
v4l2_ctrl_handler_free(&priv->hdl);
kfree(priv);
return 0;
}
static const struct i2c_device_id ov6650_id[] = {
{ "ov6650", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov6650_id);
static struct i2c_driver ov6650_i2c_driver = {
.driver = {
.name = "ov6650",
},
.probe = ov6650_probe,
.remove = ov6650_remove,
.id_table = ov6650_id,
};
static int __init ov6650_module_init(void)
{
return i2c_add_driver(&ov6650_i2c_driver);
}
static void __exit ov6650_module_exit(void)
{
i2c_del_driver(&ov6650_i2c_driver);
}
module_init(ov6650_module_init);
module_exit(ov6650_module_exit);
MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
MODULE_LICENSE("GPL v2");
|