/*
 * OmniVision OV5650 sensor driver
 *
 * Copyright (c) 2012-2013, NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/videodev2.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/log2.h>
#include <linux/delay.h>
#include <linux/module.h>

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

#include <media/ov5650.h>

#define SIZEOF_I2C_TRANSBUF 32

struct ov5650_priv {
	struct v4l2_subdev subdev;
	struct v4l2_mbus_framefmt mf;
	const struct ov5650_platform_data *pdata;

	int ident;
	u16 chip_id;
	u8 revision;

	int mode;

	struct i2c_client *client;
	u8 i2c_trans_buf[SIZEOF_I2C_TRANSBUF];
};

static struct ov5650_priv *to_ov5650(const struct v4l2_subdev *sd)
{
	return container_of(sd, struct ov5650_priv, subdev);
}

/**
 * struct ov5650_reg - ov5650 register format
 * @addr: 16-bit offset to register
 * @val: 8/16/32-bit register value
 *
 * Define a structure for OV5650 register initialization values
 */
struct ov5650_reg {
	u16	addr;
	u16	val;
};

#define OV5650_TABLE_WAIT_MS 0
#define OV5650_TABLE_END 1
#define OV5650_MAX_RETRIES 3

static struct ov5650_reg tp_none_seq[] = {
	{0x5046, 0x00},
	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg tp_cbars_seq[] = {
	{0x503D, 0xC0},
	{0x503E, 0x00},
	{0x5046, 0x01},
	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg tp_checker_seq[] = {
	{0x503D, 0xC0},
	{0x503E, 0x0A},
	{0x5046, 0x01},
	{OV5650_TABLE_END, 0x0000}
};

enum {
	TP_NONE = 1,
	TP_COLORBARS = 2,
	TP_CHECKER = 3,
};

static int test_mode;
module_param(test_mode, int, 0644);

static struct ov5650_reg reset_seq[] = {
	{0x3008, 0x82},
	{OV5650_TABLE_WAIT_MS, 5},
	{0x3008, 0x42},
	{OV5650_TABLE_WAIT_MS, 5},
	{OV5650_TABLE_END, 0x0000},
};

static struct ov5650_reg mode_start[] = {
	{0x3103, 0x93},
	{0x3017, 0xff},
	{0x3018, 0xfc},

	{0x3600, 0x50},
	{0x3601, 0x0d},
	{0x3604, 0x50},
	{0x3605, 0x04},
	{0x3606, 0x3f},
	{0x3612, 0x1a},
	{0x3630, 0x22},
	{0x3631, 0x22},
	{0x3702, 0x3a},
	{0x3704, 0x18},
	{0x3705, 0xda},
	{0x3706, 0x41},
	{0x370a, 0x80},
	{0x370b, 0x40},
	{0x370e, 0x00},
	{0x3710, 0x28},
	{0x3712, 0x13},
	{0x3830, 0x50},
	{0x3a18, 0x00},
	{0x3a19, 0xf8},
	{0x3a00, 0x38},


	{0x3603, 0xa7},
	{0x3615, 0x50},
	{0x3620, 0x56},
	{0x3810, 0x00},
	{0x3836, 0x00},
	{0x3a1a, 0x06},
	{0x4000, 0x01},
	{0x401c, 0x48},
	{0x401d, 0x08},
	{0x5000, 0x06},
	{0x5001, 0x00},
	{0x5002, 0x00},
	{0x503d, 0x00},
	{0x5046, 0x00},

	{0x300f, 0x8f},

	{0x3010, 0x10},
	{0x3011, 0x14},
	{0x3012, 0x02},
	{0x3815, 0x82},
	{0x3503, 0x00},
	{0x3613, 0x44},
	{OV5650_TABLE_END, 0x0},
};

static struct ov5650_reg mode_2592x1944[] = {
	{0x3621, 0x2f},

	{0x3632, 0x55},
	{0x3703, 0xe6},
	{0x370c, 0xa0},
	{0x370d, 0x04},
	{0x3713, 0x2f},
	{0x3800, 0x02},
	{0x3801, 0x58},
	{0x3802, 0x00},
	{0x3803, 0x0c},
	{0x3804, 0x0a},
	{0x3805, 0x20},
	{0x3806, 0x07},
	{0x3807, 0xa0},
	{0x3808, 0x0a},

	{0x3809, 0x20},

	{0x380a, 0x07},

	{0x380b, 0xa0},

	{0x380c, 0x0c},

	{0x380d, 0xb4},

	{0x380e, 0x07},

	{0x380f, 0xb0},

	{0x3818, 0xc0},
	{0x381a, 0x3c},
	{0x3a0d, 0x06},
	{0x3c01, 0x00},
	{0x3007, 0x3f},
	{0x5059, 0x80},
	{0x3003, 0x03},
	{0x3500, 0x00},
	{0x3501, 0x7a},

	{0x3502, 0xd0},

	{0x350a, 0x00},
	{0x350b, 0x00},
	{0x401d, 0x08},
	{0x4801, 0x0f},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x34},
	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_1296x972[] = {
	{0x3621, 0xaf},

	{0x3632, 0x5a},
	{0x3703, 0xb0},
	{0x370c, 0xc5},
	{0x370d, 0x42},
	{0x3713, 0x2f},
	{0x3800, 0x03},
	{0x3801, 0x3c},
	{0x3802, 0x00},
	{0x3803, 0x62},
	{0x3804, 0x05},
	{0x3805, 0x10},
	{0x3806, 0x03},
	{0x3807, 0xd0},
	{0x3808, 0x05},

	{0x3809, 0x10},

	{0x380a, 0x03},

	{0x380b, 0xd0},

	{0x380c, 0x08},

	{0x380d, 0xa8},

	{0x380e, 0x05},

	{0x380f, 0xa4},

	{0x3818, 0xc1},
	{0x381a, 0x00},
	{0x3a0d, 0x08},
	{0x3c01, 0x00},
	{0x3007, 0x3b},
	{0x5059, 0x80},
	{0x3003, 0x03},
	{0x3500, 0x00},

	{0x3501, 0x5a},
	{0x3502, 0x10},
	{0x350a, 0x00},
	{0x350b, 0x10},
	{0x401d, 0x08},
	{0x4801, 0x0f},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x34},
	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_2080x1164[] = {
	{0x3103, 0x93},
	{0x3007, 0x3b},
	{0x3017, 0xff},
	{0x3018, 0xfc},

	{0x3600, 0x54},
	{0x3601, 0x05},
	{0x3603, 0xa7},
	{0x3604, 0x40},
	{0x3605, 0x04},
	{0x3606, 0x3f},
	{0x3612, 0x1a},
	{0x3613, 0x44},
	{0x3615, 0x52},
	{0x3620, 0x56},
	{0x3623, 0x01},
	{0x3630, 0x22},
	{0x3631, 0x36},
	{0x3632, 0x5f},
	{0x3633, 0x24},

	{0x3702, 0x3a},
	{0x3704, 0x18},
	{0x3706, 0x41},
	{0x370b, 0x40},
	{0x370e, 0x00},
	{0x3710, 0x28},
	{0x3711, 0x24},
	{0x3712, 0x13},

	{0x3810, 0x00},
	{0x3815, 0x82},
	{0x3830, 0x50},
	{0x3836, 0x00},

	{0x3a1a, 0x06},
	{0x3a18, 0x00},
	{0x3a19, 0xf8},
	{0x3a00, 0x38},

	{0x3a0d, 0x06},
	{0x3c01, 0x34},

	{0x401f, 0x03},
	{0x4000, 0x05},
	{0x401d, 0x08},
	{0x4001, 0x02},

	{0x5001, 0x00},
	{0x5002, 0x00},
	{0x503d, 0x00},
	{0x5046, 0x00},

	{0x300f, 0x8f},

	{0x3010, 0x10},
	{0x3011, 0x14},
	{0x3012, 0x02},
	{0x3503, 0x00},


	{0x3621, 0x2f},

	{0x3703, 0xe6},
	{0x370c, 0x00},
	{0x370d, 0x04},
	{0x3713, 0x22},
	{0x3714, 0x27},
	{0x3705, 0xda},
	{0x370a, 0x80},

	{0x3800, 0x02},
	{0x3801, 0x12},
	{0x3802, 0x00},
	{0x3803, 0x0a},
	{0x3804, 0x08},
	{0x3805, 0x20},
	{0x3806, 0x04},
	{0x3807, 0x92},
	{0x3808, 0x08},

	{0x3809, 0x20},

	{0x380a, 0x04},

	{0x380b, 0x92},

	{0x380c, 0x0a},

	{0x380d, 0x96},

	{0x380e, 0x04},

	{0x380f, 0x9e},

	{0x3818, 0xc0},
	{0x381a, 0x3c},
	{0x381c, 0x31},
	{0x381d, 0x8e},
	{0x381e, 0x04},
	{0x381f, 0x92},
	{0x3820, 0x04},
	{0x3821, 0x19},
	{0x3824, 0x01},
	{0x3827, 0x0a},
	{0x401c, 0x46},

	{0x3003, 0x03},
	{0x3500, 0x00},
	{0x3501, 0x49},
	{0x3502, 0xa0},
	{0x350a, 0x00},
	{0x350b, 0x00},
	{0x4801, 0x0f},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x34},

	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_1920x1080[] = {
	{0x3103, 0x93},
	{0x3007, 0x3b},
	{0x3017, 0xff},
	{0x3018, 0xfc},

	{0x3600, 0x54},
	{0x3601, 0x05},
	{0x3603, 0xa7},
	{0x3604, 0x40},
	{0x3605, 0x04},
	{0x3606, 0x3f},
	{0x3612, 0x1a},
	{0x3613, 0x44},
	{0x3615, 0x52},
	{0x3620, 0x56},
	{0x3623, 0x01},
	{0x3630, 0x22},
	{0x3631, 0x36},
	{0x3632, 0x5f},
	{0x3633, 0x24},

	{0x3702, 0x3a},
	{0x3704, 0x18},
	{0x3706, 0x41},
	{0x370b, 0x40},
	{0x370e, 0x00},
	{0x3710, 0x28},
	{0x3711, 0x24},
	{0x3712, 0x13},

	{0x3810, 0x00},
	{0x3815, 0x82},

	{0x3830, 0x50},
	{0x3836, 0x00},

	{0x3a1a, 0x06},
	{0x3a18, 0x00},
	{0x3a19, 0xf8},
	{0x3a00, 0x38},
	{0x3a0d, 0x06},
	{0x3c01, 0x34},

	{0x401f, 0x03},
	{0x4000, 0x05},
	{0x401d, 0x08},
	{0x4001, 0x02},

	{0x5001, 0x00},
	{0x5002, 0x00},
	{0x503d, 0x00},
	{0x5046, 0x00},

	{0x300f, 0x8f},
	{0x3010, 0x10},
	{0x3011, 0x14},
	{0x3012, 0x02},
	{0x3503, 0x00},

	{0x3621, 0x2f},
	{0x3703, 0xe6},
	{0x370c, 0x00},
	{0x370d, 0x04},
	{0x3713, 0x22},
	{0x3714, 0x27},
	{0x3705, 0xda},
	{0x370a, 0x80},

	{0x3800, 0x02},
	{0x3801, 0x94},
	{0x3802, 0x00},
	{0x3803, 0x00},
	{0x3804, 0x07},
	{0x3805, 0x80},
	{0x3806, 0x04},
	{0x3807, 0x40},
	{0x3808, 0x07},
	{0x3809, 0x80},
	{0x380a, 0x04},
	{0x380b, 0x40},
	{0x380c, 0x0a},
	{0x380d, 0x84},
	{0x380e, 0x04},
	{0x380f, 0xa4},
	{0x3818, 0xc0},
	{0x381a, 0x3c},
	{0x381c, 0x31},
	{0x381d, 0xa4},
	{0x381e, 0x04},
	{0x381f, 0x60},
	{0x3820, 0x03},
	{0x3821, 0x1a},
	{0x3824, 0x01},
	{0x3827, 0x0a},
	{0x401c, 0x46},

	{0x3003, 0x03},
	{0x3500, 0x00},
	{0x3501, 0x49},
	{0x3502, 0xa0},
	{0x350a, 0x00},
	{0x350b, 0x00},
	{0x4801, 0x0f},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x34},

	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_1280x720[] = {
	{0x3103, 0x93},
	{0x3b07, 0x0c},
	{0x3017, 0xff},
	{0x3018, 0xfc},
	{0x3706, 0x41},
	{0x3613, 0xc4},
	{0x370d, 0x42},
	{0x3703, 0x9a},
	{0x3630, 0x22},
	{0x3605, 0x04},
	{0x3606, 0x3f},
	{0x3712, 0x13},
	{0x370e, 0x00},
	{0x370b, 0x40},
	{0x3600, 0x54},
	{0x3601, 0x05},
	{0x3713, 0x22},
	{0x3714, 0x27},
	{0x3631, 0x22},
	{0x3612, 0x1a},
	{0x3604, 0x40},
	{0x3705, 0xdb},
	{0x370a, 0x81},
	{0x370c, 0x00},
	{0x3710, 0x28},
	{0x3702, 0x3a},
	{0x3704, 0x18},
	{0x3a18, 0x00},
	{0x3a19, 0xf8},
	{0x3a00, 0x38},
	{0x3800, 0x02},
	{0x3801, 0x54},
	{0x3803, 0x0c},
	{0x380c, 0x0c},
	{0x380d, 0xb4},
	{0x380e, 0x07},
	{0x380f, 0xb0},
	{0x3830, 0x50},
	{0x3a08, 0x12},
	{0x3a09, 0x70},
	{0x3a0a, 0x0f},
	{0x3a0b, 0x60},
	{0x3a0d, 0x06},
	{0x3a0e, 0x06},
	{0x3a13, 0x54},
	{0x3815, 0x82},
	{0x5059, 0x80},
	{0x3615, 0x52},
	{0x505a, 0x0a},
	{0x505b, 0x2e},
	{0x3713, 0x92},
	{0x3714, 0x17},
	{0x3804, 0x05},
	{0x3805, 0x00},
	{0x3806, 0x02},
	{0x3807, 0xd0},
	{0x3808, 0x05},
	{0x3809, 0x00},
	{0x380a, 0x02},
	{0x380b, 0xd0},
	{0x380c, 0x08},
	{0x380d, 0x72},
	{0x380e, 0x02},
	{0x380f, 0xe4},
	{0x3815, 0x81},
	{0x381c, 0x10},
	{0x381d, 0x82},
	{0x381e, 0x05},
	{0x381f, 0xc0},
	{0x3821, 0x20},
	{0x3824, 0x23},
	{0x3825, 0x2c},
	{0x3826, 0x00},
	{0x3827, 0x0c},
	{0x3a08, 0x1b},
	{0x3a09, 0xc0},
	{0x3a0a, 0x17},
	{0x3a0b, 0x20},
	{0x3a0d, 0x01},
	{0x3a0e, 0x01},
	{0x3a1a, 0x06},
	{0x3503, 0x00},
	{0x3623, 0x01},
	{0x3633, 0x24},
	{0x3c01, 0x34},
	{0x3c04, 0x28},
	{0x3c05, 0x98},
	{0x3c07, 0x07},
	{0x3c09, 0xc2},
	{0x4000, 0x05},
	{0x401d, 0x28},
	{0x4001, 0x02},
	{0x401c, 0x42},
	{0x5046, 0x09},
	{0x3810, 0x40},
	{0x3836, 0x41},
	{0x505f, 0x04},
	{0x5000, 0xfe},
	{0x5001, 0x01},
	{0x5002, 0x00},
	{0x503d, 0x00},  /* bit[7]=1 enable test_pattern */
	{0x5901, 0x00},
	{0x585a, 0x01},
	{0x585b, 0x2c},
	{0x585c, 0x01},
	{0x585d, 0x93},
	{0x585e, 0x01},
	{0x585f, 0x90},
	{0x5860, 0x01},
	{0x5861, 0x0d},
	{0x5180, 0xc0},
	{0x5184, 0x00},
	{0x470a, 0x00},
	{0x470b, 0x00},
	{0x470c, 0x00},
	{0x300f, 0x8e},
	{0x3603, 0xa7},
	{0x3632, 0x55},
	{0x3620, 0x56},
	{0x3621, 0xaf},
	{0x3818, 0xc1},
	{0x3631, 0x36},
	{0x3632, 0x5f},
	{0x3711, 0x24},
	{0x401f, 0x03},
	{0x3008, 0x02},

	{0x3011, 0x14},
	{0x3007, 0x3B},
	{0x4801, 0x0f},
	{0x3003, 0x03},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x04},  /* bit[5]=0 as CSI continuous clock */
	{0x300f, 0x8f},
	{0x3010, 0x10},
	{0x3815, 0x82},
	{0x3003, 0x01},


	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_1264x704[] = {
	{0x3600, 0x54},
	{0x3601, 0x05},
	{0x3604, 0x40},
	{0x3705, 0xdb},
	{0x370a, 0x81},
	{0x3615, 0x52},
	{0x3810, 0x40},
	{0x3836, 0x41},
	{0x4000, 0x05},
	{0x401c, 0x42},
	{0x401d, 0x08},
	{0x5046, 0x09},
	{0x3010, 0x00},
	{0x3503, 0x00},
	{0x3613, 0xc4},

	{0x3621, 0xaf},

	{0x3632, 0x55},
	{0x3703, 0x9a},
	{0x370c, 0x00},
	{0x370d, 0x42},
	{0x3713, 0x22},
	{0x3800, 0x02},
	{0x3801, 0x54},
	{0x3802, 0x00},
	{0x3803, 0x0c},
	{0x3804, 0x05},
	{0x3805, 0x00},
	{0x3806, 0x02},
	{0x3807, 0xd0},
	{0x3808, 0x05},

	{0x3809, 0x00},

	{0x380a, 0x02},

	{0x380b, 0xd0},

	{0x380c, 0x08},

	{0x380d, 0x72},

	{0x380e, 0x02},

	{0x380f, 0xe4},

	{0x3818, 0xc1},
	{0x381a, 0x3c},
	{0x3a0d, 0x06},
	{0x3c01, 0x34},
	{0x3007, 0x3b},
	{0x5059, 0x80},
	{0x3003, 0x03},
	{0x3500, 0x04},
	{0x3501, 0xa5},

	{0x3502, 0x10},

	{0x350a, 0x00},
	{0x350b, 0x00},
	{0x4801, 0x0f},
	{0x300e, 0x0c},
	{0x4803, 0x50},
	{0x4800, 0x24},
	{0x300f, 0x8b},

	{0x3711, 0x24},
	{0x3713, 0x92},
	{0x3714, 0x17},
	{0x381c, 0x10},
	{0x381d, 0x82},
	{0x381e, 0x05},
	{0x381f, 0xc0},
	{0x3821, 0x20},
	{0x3824, 0x23},
	{0x3825, 0x2c},
	{0x3826, 0x00},
	{0x3827, 0x0c},
	{0x3623, 0x01},
	{0x3633, 0x24},
	{0x3632, 0x5f},
	{0x401f, 0x03},

	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_320x240[] = {
	{0x3103, 0x93},
	{0x3b07, 0x0c},
	{0x3017, 0xff},
	{0x3018, 0xfc},
	{0x3706, 0x41},
	{0x3613, 0xc4},
	{0x370d, 0x42},
	{0x3703, 0x9a},
	{0x3630, 0x22},
	{0x3605, 0x04},
	{0x3606, 0x3f},
	{0x3712, 0x13},
	{0x370e, 0x00},
	{0x370b, 0x40},
	{0x3600, 0x54},
	{0x3601, 0x05},
	{0x3713, 0x22},
	{0x3714, 0x27},
	{0x3631, 0x22},
	{0x3612, 0x1a},
	{0x3604, 0x40},
	{0x3705, 0xdc},
	{0x370a, 0x83},
	{0x370c, 0xc8},
	{0x3710, 0x28},
	{0x3702, 0x3a},
	{0x3704, 0x18},
	{0x3a18, 0x00},
	{0x3a19, 0xf8},
	{0x3a00, 0x38},
	{0x3800, 0x02},
	{0x3801, 0x54},
	{0x3803, 0x0c},
	{0x380c, 0x0c},
	{0x380d, 0xb4},
	{0x380e, 0x07},
	{0x380f, 0xb0},
	{0x3830, 0x50},
	{0x3a08, 0x12},
	{0x3a09, 0x70},
	{0x3a0a, 0x0f},
	{0x3a0b, 0x60},
	{0x3a0d, 0x06},
	{0x3a0e, 0x06},
	{0x3a13, 0x54},
	{0x3815, 0x82},
	{0x5059, 0x80},
	{0x3615, 0x52},
	{0x505a, 0x0a},
	{0x505b, 0x2e},
	{0x3713, 0x92},
	{0x3714, 0x17},
	{0x3803, 0x0a},
	{0x3804, 0x05},
	{0x3805, 0x00},
	{0x3806, 0x01},
	{0x3807, 0x00},
	{0x3808, 0x01},
	{0x3809, 0x40},
	{0x380a, 0x01},
	{0x380b, 0x00},
	{0x380c, 0x0a},

	{0x380d, 0x04},

	{0x380e, 0x01},

	{0x380f, 0x38},

	{0x3500, 0x00},
	{0x3501, 0x13},
	{0x3502, 0x80},
	{0x350b, 0x7f},

	{0x3815, 0x81},
	{0x3824, 0x23},
	{0x3825, 0x20},
	{0x3826, 0x00},
	{0x3827, 0x08},
	{0x370d, 0xc2},
	{0x3a08, 0x17},
	{0x3a09, 0x64},
	{0x3a0a, 0x13},
	{0x3a0b, 0x80},
	{0x3a00, 0x58},
	{0x3a1a, 0x06},
	{0x3503, 0x00},
	{0x3623, 0x01},
	{0x3633, 0x24},
	{0x3c01, 0x34},
	{0x3c04, 0x28},
	{0x3c05, 0x98},
	{0x3c07, 0x07},
	{0x3c09, 0xc2},
	{0x4000, 0x05},
	{0x401d, 0x08},
	{0x4001, 0x02},
	{0x401c, 0x42},
	{0x5046, 0x09},
	{0x3810, 0x40},
	{0x3836, 0x41},
	{0x505f, 0x04},
	{0x5001, 0x00},
	{0x5002, 0x02},
	{0x503d, 0x00},
	{0x5901, 0x08},
	{0x585a, 0x01},
	{0x585b, 0x2c},
	{0x585c, 0x01},
	{0x585d, 0x93},
	{0x585e, 0x01},
	{0x585f, 0x90},
	{0x5860, 0x01},
	{0x5861, 0x0d},
	{0x5180, 0xc0},
	{0x5184, 0x00},
	{0x470a, 0x00},
	{0x470b, 0x00},
	{0x470c, 0x00},
	{0x300f, 0x8e},
	{0x3603, 0xa7},
	{0x3632, 0x55},
	{0x3620, 0x56},
	{0x3621, 0xaf},
	{0x3818, 0xc3},
	{0x3631, 0x36},
	{0x3632, 0x5f},
	{0x3711, 0x24},
	{0x401f, 0x03},

	{0x3011, 0x14},
	{0x3007, 0x3B},
	{0x300f, 0x8f},
	{0x4801, 0x0f},
	{0x3003, 0x03},
	{0x300e, 0x0c},
	{0x3010, 0x15},
	{0x4803, 0x50},
	{0x4800, 0x24},
	{0x4837, 0x40},
	{0x3815, 0x82},

	{OV5650_TABLE_END, 0x0000}
};

static struct ov5650_reg mode_end[] = {
	{0x3212, 0x00},
	{0x3003, 0x01},
	{0x3212, 0x10},
	{0x3212, 0xa0},
	{0x3008, 0x02},

	{OV5650_TABLE_END, 0x0000}
};

enum {
	OV5650_MODE_2592x1944,
	OV5650_MODE_2080x1164,
	OV5650_MODE_1920x1080,
	OV5650_MODE_1296x972,
	OV5650_MODE_1280x720,
	OV5650_MODE_1264x704,
	OV5650_MODE_320x240,
	OV5650_MODE_INVALID
};

static struct ov5650_reg *mode_table[] = {
	[OV5650_MODE_2592x1944] = mode_2592x1944,
	[OV5650_MODE_2080x1164] = mode_2080x1164,
	[OV5650_MODE_1920x1080] = mode_1920x1080,
	[OV5650_MODE_1296x972]  = mode_1296x972,
	[OV5650_MODE_1280x720]  = mode_1280x720,
	[OV5650_MODE_1264x704]  = mode_1264x704,
	[OV5650_MODE_320x240]   = mode_320x240
};

static const struct v4l2_frmsize_discrete ov5650_frmsizes[] = {
	{2592, 1944},
	{2080, 1164},
	{1920, 1080},
	{1296, 972},
	{1280, 720},
	{1264, 704},
	{320, 240},
};

static int ov5650_find_mode(u32 width, u32 height)
{
	if (width == 2592 && height == 1944)
		return OV5650_MODE_2592x1944;
	else if (width == 2080 && height == 1164)
		return OV5650_MODE_2080x1164;
	else if (width == 1920 && height == 1080)
		return OV5650_MODE_1920x1080;
	else if (width == 1296 && height == 972)
		return OV5650_MODE_1296x972;
	else if (width == 1280 && height == 720)
		return OV5650_MODE_1280x720;
	else if (width == 1264 && height == 704)
		return OV5650_MODE_1264x704;
	else if (width == 320 && height == 240)
		return OV5650_MODE_320x240;
	else {
		pr_err("ov5650: %dx%d is not supported\n", width, height);
		return OV5650_MODE_2592x1944;
	}
}

/**
 * ov5650_reg_read - Read a value from a register in an ov5650 sensor device
 * @client: i2c driver client structure
 * @reg: register address / offset
 * @val: stores the value that gets read
 *
 * Read a value from a register in an ov5650 sensor device.
 * The value is returned in 'val'.
 * Returns zero if successful, or non-zero otherwise.
 */
static int ov5650_reg_read(struct i2c_client *client, u16 reg, u8 *val)
{
	int ret;
	u8 data[2] = {0};
	struct i2c_msg msg = {
		.addr	= client->addr,
		.flags	= 0,
		.len	= 2,
		.buf	= data,
	};

	data[0] = (u8)(reg >> 8);
	data[1] = (u8)(reg & 0xff);

	ret = i2c_transfer(client->adapter, &msg, 1);
	if (ret < 0)
		goto err;

	msg.flags = I2C_M_RD;
	msg.len = 1;
	ret = i2c_transfer(client->adapter, &msg, 1);
	if (ret < 0)
		goto err;

	*val = data[0];
	return 0;

err:
	dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
	return ret;
}

/**
 * Write a value to a register in ov5650 sensor device.
 * @client: i2c driver client structure.
 * @reg: Address of the register to read value from.
 * @val: Value to be written to a specific register.
 * Returns zero if successful, or non-zero otherwise.
 */
static int ov5650_reg_write(struct i2c_client *client, u16 reg, u8 val)
{
	int ret;
	unsigned char data[3] = { (u8)(reg >> 8), (u8)(reg & 0xff), val };
	struct i2c_msg msg = {
		.addr	= client->addr,
		.flags	= 0,
		.len	= 3,
		.buf	= data,
	};

	ret = i2c_transfer(client->adapter, &msg, 1);
	if (ret < 0) {
		dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
		return ret;
	}

	return 0;
}

static int ov5650_write_bulk_reg(struct ov5650_priv *priv, int len)
{
	struct i2c_client *client = priv->client;
	u8 *data = priv->i2c_trans_buf;
	int err;
	struct i2c_msg msg;

	if (!client->adapter)
		return -ENODEV;

	msg.addr = client->addr;
	msg.flags = 0;
	msg.len = len;
	msg.buf = data;

	err = i2c_transfer(client->adapter, &msg, 1);
	if (err != 1) {
		dev_err(&client->dev, "I2C bulk transfer failed at %x\n",
			(int)data[0] << 8 | data[1]);
		return err;
	}

	return 0;
}

static int ov5650_write_table(struct ov5650_priv *priv,
			      const struct ov5650_reg table[])
{
	int err;
	const struct ov5650_reg *next, *n_next;
	u8 *b_ptr = priv->i2c_trans_buf;
	unsigned int buf_filled = 0;
	u16 val;

	for (next = table; next->addr != OV5650_TABLE_END; next++) {
		if (next->addr == OV5650_TABLE_WAIT_MS) {
			msleep(next->val);
			continue;
		}

		val = next->val;

		if (!buf_filled) {
			b_ptr = priv->i2c_trans_buf;
			*b_ptr++ = next->addr >> 8;
			*b_ptr++ = next->addr & 0xff;
			buf_filled = 2;
		}
		*b_ptr++ = val;
		buf_filled++;

		n_next = next + 1;
		if (n_next->addr != OV5650_TABLE_END &&
			n_next->addr != OV5650_TABLE_WAIT_MS &&
			buf_filled < SIZEOF_I2C_TRANSBUF &&
			n_next->addr == next->addr + 1) {
			continue;
		}

		err = ov5650_write_bulk_reg(priv, buf_filled);
		if (err)
			return err;

		buf_filled = 0;
	}
	return 0;
}

/* -----------------------------------------------------------------------------
 * V4L2 subdev internal operations
 */

static void ov5650_set_default_fmt(struct ov5650_priv *priv)
{
	struct v4l2_mbus_framefmt *mf = &priv->mf;

	mf->width = ov5650_frmsizes[OV5650_MODE_2592x1944].width;
	mf->height = ov5650_frmsizes[OV5650_MODE_2592x1944].height;
	mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
	mf->field = V4L2_FIELD_NONE;
	mf->colorspace = V4L2_COLORSPACE_SRGB;
}

static int ov5650_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct ov5650_priv *priv = to_ov5650(sd);
	int ret = 0;

	if (!enable) {
		ov5650_set_default_fmt(priv);
		return 0;
	}

	ret = ov5650_write_table(priv, reset_seq);
	if (ret)
		return ret;

	ret = ov5650_write_table(priv, mode_start);
	if (ret)
		return ret;

	ret = ov5650_write_table(priv, mode_table[priv->mode]);
	if (ret)
		return ret;

	ret = ov5650_write_table(priv, mode_end);
	if (ret)
		return ret;

	switch (test_mode) {
	case TP_NONE:
		ret = ov5650_write_table(priv, tp_none_seq);
		break;
	case TP_COLORBARS:
		ret = ov5650_write_table(priv, tp_cbars_seq);
		break;
	case TP_CHECKER:
		ret = ov5650_write_table(priv, tp_checker_seq);
		break;
	}
	if (ret)
		return ret;

	return ret;
}

static int ov5650_s_fmt(struct v4l2_subdev *sd,
			struct v4l2_mbus_framefmt *mf)
{
	struct ov5650_priv *priv = to_ov5650(sd);

	priv->mode = ov5650_find_mode(mf->width, mf->height);
	memcpy(&priv->mf, mf, sizeof(struct v4l2_mbus_framefmt));

	return 0;
}

static int ov5650_s_power(struct v4l2_subdev *sd, int on)
{
	struct ov5650_priv *priv = to_ov5650(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);

	if (on)
		ov5650_s_fmt(sd, &priv->mf);

	return soc_camera_set_power(&client->dev, icl, on);
}

static int ov5650_try_fmt(struct v4l2_subdev *sd,
			  struct v4l2_mbus_framefmt *mf)
{
	int mode;

	mode = ov5650_find_mode(mf->width, mf->height);
	mf->width = ov5650_frmsizes[mode].width;
	mf->height = ov5650_frmsizes[mode].height;

	if (mf->code != V4L2_MBUS_FMT_SBGGR8_1X8 &&
	    mf->code != V4L2_MBUS_FMT_SBGGR10_1X10)
		mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;

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

	ov5650_s_fmt(sd, mf);

	return 0;
}

static int ov5650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
			   enum v4l2_mbus_pixelcode *code)
{
	if (index >= 2)
		return -EINVAL;

	switch (index) {
	case 0:
		*code = V4L2_MBUS_FMT_SBGGR10_1X10;
		break;
	case 1:
		*code = V4L2_MBUS_FMT_SBGGR8_1X8;
		break;
	}

	return 0;
}

static int ov5650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
	a->bounds.left		= 0;
	a->bounds.top		= 0;
	a->bounds.width		= ov5650_frmsizes[OV5650_MODE_2592x1944].width;
	a->bounds.height	= ov5650_frmsizes[OV5650_MODE_2592x1944].height;
	a->defrect		= a->bounds;
	a->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE;
	a->pixelaspect.numerator	= 1;
	a->pixelaspect.denominator	= 1;

	return 0;
}

static int ov5650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
	a->c.left		= 0;
	a->c.top		= 0;
	a->c.width		= ov5650_frmsizes[OV5650_MODE_2592x1944].width;
	a->c.height		= ov5650_frmsizes[OV5650_MODE_2592x1944].height;
	a->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE;

	return 0;
}

/* Get chip identification */
static int ov5650_g_chip_ident(struct v4l2_subdev *sd,
			       struct v4l2_dbg_chip_ident *id)
{
	struct ov5650_priv *priv = to_ov5650(sd);

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

	return 0;
}

static struct v4l2_subdev_video_ops ov5650_video_ops = {
	.s_stream		= ov5650_s_stream,
	.s_mbus_fmt		= ov5650_s_fmt,
	.try_mbus_fmt		= ov5650_try_fmt,
	.enum_mbus_fmt		= ov5650_enum_fmt,
	.cropcap		= ov5650_cropcap,
	.g_crop			= ov5650_g_crop,
};

static struct v4l2_subdev_core_ops ov5650_core_ops = {
	.g_chip_ident		= ov5650_g_chip_ident,
	.s_power		= ov5650_s_power,
};

static struct v4l2_subdev_ops ov5650_subdev_ops = {
	.core			= &ov5650_core_ops,
	.video			= &ov5650_video_ops,
};

static int ov5650_probe(struct i2c_client *client,
			 const struct i2c_device_id *did)
{
	struct ov5650_priv *priv;
	struct soc_camera_link *icl;
	u8 chipid[2];
	int ret;

	/* Checking soc-camera interface */
	icl = soc_camera_i2c_to_link(client);
	if (!icl) {
		dev_err(&client->dev, "Missing soc_camera_link for driver\n");
		return -EINVAL;
	}

	/* Register OV5650 soc_camera device interface */
	priv = kzalloc(sizeof(struct ov5650_priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&client->dev, "Failed to allocate private data!\n");
		return -ENOMEM;
	}

	v4l2_i2c_subdev_init(&priv->subdev, client, &ov5650_subdev_ops);

	priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	priv->ident = V4L2_IDENT_OV5650;

	/* Detecting OV5650 sensor */
	soc_camera_power_on(&client->dev, icl);
	ret = ov5650_reg_read(client, 0x300A, &chipid[0]);
	if (ret) {
		dev_err(&client->dev, "Failure to read Chip ID (high byte)\n");
		goto err;
	}

	ret = ov5650_reg_read(client, 0x300B, &chipid[1]);
	if (ret) {
		dev_err(&client->dev, "Failure to read Chip ID (low byte)\n");
		goto err;
	}

	priv->chip_id = (chipid[0] << 8) | chipid[1];

	if ((priv->chip_id != 0x5650) && (priv->chip_id != 0x5651)) {
		dev_err(&client->dev, "Chip ID: %x not supported!\n",
			priv->chip_id);
		ret = -ENODEV;
		goto err;
	}

	priv->revision = (chipid[1] == 0x50) ? 0x1A : 0x1B;

	soc_camera_power_off(&client->dev, icl);

	priv->client = client;

	ov5650_set_default_fmt(priv);

	dev_info(&client->dev, "Detected a OV%x chip, revision %x\n",
			priv->chip_id, priv->revision);

	return 0;

err:
	kfree(priv);

	return ret;
}

static int ov5650_remove(struct i2c_client *client)
{
	struct ov5650_priv *priv = i2c_get_clientdata(client);

	kfree(priv);
	return 0;
}

static const struct i2c_device_id ov5650_id[] = {
	{ "ov5650_v4l2", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ov5650_id);

static struct i2c_driver ov5650_i2c_driver = {
	.driver = {
		.name = "ov5650_v4l2",
	},
	.probe		= ov5650_probe,
	.remove		= ov5650_remove,
	.id_table	= ov5650_id,
};

static int __init ov5650_module_init(void)
{
	return i2c_add_driver(&ov5650_i2c_driver);
}

static void __exit ov5650_module_exit(void)
{
	i2c_del_driver(&ov5650_i2c_driver);
}

module_init(ov5650_module_init);
module_exit(ov5650_module_exit);

MODULE_DESCRIPTION("OmniVision OV5650 Camera driver");
MODULE_AUTHOR("Bryan Wu <pengw@nvidia.com>");
MODULE_LICENSE("GPL v2");