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linux_dsm_epyc7002/drivers/media/video/ov5642.c
Bastian Hecht 171f1a48bb [media] media: ov5642: Add support for arbitrary resolution 
This patch adds the ability to get arbitrary resolutions with a width
up to 2592 and a height up to 720 pixels instead of the standard 1280x720
only.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-11-03 18:29:05 -02:00

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/*
* 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-chip-ident.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 {
enum v4l2_mbus_pixelcode code;
enum v4l2_colorspace colorspace;
};
struct ov5642 {
struct v4l2_subdev subdev;
const struct ov5642_datafmt *fmt;
struct v4l2_rect crop_rect;
/* blanking information */
int total_width;
int total_height;
};
static const struct ov5642_datafmt ov5642_colour_fmts[] = {
{V4L2_MBUS_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(enum v4l2_mbus_pixelcode 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 endianess */
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, 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_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5642 *priv = to_ov5642(client);
const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code);
mf->width = priv->crop_rect.width;
mf->height = priv->crop_rect.height;
if (!fmt) {
mf->code = ov5642_colour_fmts[0].code;
mf->colorspace = ov5642_colour_fmts[0].colorspace;
}
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int ov5642_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5642 *priv = to_ov5642(client);
/* MIPI CSI could have changed the format, double-check */
if (!ov5642_find_datafmt(mf->code))
return -EINVAL;
ov5642_try_fmt(sd, mf);
priv->fmt = ov5642_find_datafmt(mf->code);
return 0;
}
static int ov5642_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5642 *priv = to_ov5642(client);
const struct ov5642_datafmt *fmt = priv->fmt;
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_fmt(struct v4l2_subdev *sd, unsigned int index,
enum v4l2_mbus_pixelcode *code)
{
if (index >= ARRAY_SIZE(ov5642_colour_fmts))
return -EINVAL;
*code = ov5642_colour_fmts[index].code;
return 0;
}
static int ov5642_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
if (id->match.addr != client->addr)
return -ENODEV;
id->ident = V4L2_IDENT_OV5642;
id->revision = 0;
return 0;
}
static int ov5642_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5642 *priv = to_ov5642(client);
struct v4l2_rect *rect = &a->c;
int ret;
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_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5642 *priv = to_ov5642(client);
struct v4l2_rect *rect = &a->c;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
*rect = priv->crop_rect;
return 0;
}
static int ov5642_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = OV5642_MAX_WIDTH;
a->bounds.height = OV5642_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 ov5642_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *cfg)
{
cfg->type = V4L2_MBUS_CSI2;
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;
int ret;
if (!on)
return 0;
client = v4l2_get_subdevdata(sd);
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 struct v4l2_subdev_video_ops ov5642_subdev_video_ops = {
.s_mbus_fmt = ov5642_s_fmt,
.g_mbus_fmt = ov5642_g_fmt,
.try_mbus_fmt = ov5642_try_fmt,
.enum_mbus_fmt = ov5642_enum_fmt,
.s_crop = ov5642_s_crop,
.g_crop = ov5642_g_crop,
.cropcap = ov5642_cropcap,
.g_mbus_config = ov5642_g_mbus_config,
};
static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
.s_power = ov5642_s_power,
.g_chip_ident = ov5642_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov5642_get_register,
.s_register = ov5642_set_register,
#endif
};
static struct v4l2_subdev_ops ov5642_subdev_ops = {
.core = &ov5642_subdev_core_ops,
.video = &ov5642_subdev_video_ops,
};
static int ov5642_video_probe(struct i2c_client *client)
{
int ret;
u8 id_high, id_low;
u16 id;
/* Read sensor Model ID */
ret = reg_read(client, REG_CHIP_ID_HIGH, &id_high);
if (ret < 0)
return ret;
id = id_high << 8;
ret = reg_read(client, REG_CHIP_ID_LOW, &id_low);
if (ret < 0)
return ret;
id |= id_low;
dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
if (id != 0x5642)
return -ENODEV;
return 0;
}
static int ov5642_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov5642 *priv;
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
int ret;
if (!icl) {
dev_err(&client->dev, "OV5642: missing platform data!\n");
return -EINVAL;
}
priv = kzalloc(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->crop_rect.width = OV5642_DEFAULT_WIDTH;
priv->crop_rect.height = OV5642_DEFAULT_HEIGHT;
priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH;
priv->total_height = BLANKING_MIN_HEIGHT;
ret = ov5642_video_probe(client);
if (ret < 0)
goto error;
return 0;
error:
kfree(priv);
return ret;
}
static int ov5642_remove(struct i2c_client *client)
{
struct ov5642 *priv = to_ov5642(client);
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
if (icl->free_bus)
icl->free_bus(icl);
kfree(priv);
return 0;
}
static const struct i2c_device_id ov5642_id[] = {
{ "ov5642", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov5642_id);
static struct i2c_driver ov5642_i2c_driver = {
.driver = {
.name = "ov5642",
},
.probe = ov5642_probe,
.remove = ov5642_remove,
.id_table = ov5642_id,
};
static int __init ov5642_mod_init(void)
{
return i2c_add_driver(&ov5642_i2c_driver);
}
static void __exit ov5642_mod_exit(void)
{
i2c_del_driver(&ov5642_i2c_driver);
}
module_init(ov5642_mod_init);
module_exit(ov5642_mod_exit);
MODULE_DESCRIPTION("Omnivision OV5642 Camera driver");
MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
MODULE_LICENSE("GPL v2");
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