root/drivers/media/i2c/ov13858.c
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017 Intel Corporation.

#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>

#define OV13858_REG_VALUE_08BIT         1
#define OV13858_REG_VALUE_16BIT         2
#define OV13858_REG_VALUE_24BIT         3

#define OV13858_REG_MODE_SELECT         0x0100
#define OV13858_MODE_STANDBY            0x00
#define OV13858_MODE_STREAMING          0x01

#define OV13858_REG_SOFTWARE_RST        0x0103
#define OV13858_SOFTWARE_RST            0x01

/* PLL1 generates PCLK and MIPI_PHY_CLK */
#define OV13858_REG_PLL1_CTRL_0         0x0300
#define OV13858_REG_PLL1_CTRL_1         0x0301
#define OV13858_REG_PLL1_CTRL_2         0x0302
#define OV13858_REG_PLL1_CTRL_3         0x0303
#define OV13858_REG_PLL1_CTRL_4         0x0304
#define OV13858_REG_PLL1_CTRL_5         0x0305

/* PLL2 generates DAC_CLK, SCLK and SRAM_CLK */
#define OV13858_REG_PLL2_CTRL_B         0x030b
#define OV13858_REG_PLL2_CTRL_C         0x030c
#define OV13858_REG_PLL2_CTRL_D         0x030d
#define OV13858_REG_PLL2_CTRL_E         0x030e
#define OV13858_REG_PLL2_CTRL_F         0x030f
#define OV13858_REG_PLL2_CTRL_12        0x0312
#define OV13858_REG_MIPI_SC_CTRL0       0x3016
#define OV13858_REG_MIPI_SC_CTRL1       0x3022

/* Chip ID */
#define OV13858_REG_CHIP_ID             0x300a
#define OV13858_CHIP_ID                 0x00d855

/* V_TIMING internal */
#define OV13858_REG_VTS                 0x380e
#define OV13858_VTS_30FPS               0x0c8e /* 30 fps */
#define OV13858_VTS_60FPS               0x0648 /* 60 fps */
#define OV13858_VTS_MAX                 0x7fff

/* HBLANK control - read only */
#define OV13858_PPL_270MHZ              2244
#define OV13858_PPL_540MHZ              4488

/* Exposure control */
#define OV13858_REG_EXPOSURE            0x3500
#define OV13858_EXPOSURE_MIN            4
#define OV13858_EXPOSURE_STEP           1
#define OV13858_EXPOSURE_DEFAULT        0x640

/* Analog gain control */
#define OV13858_REG_ANALOG_GAIN         0x3508
#define OV13858_ANA_GAIN_MIN            0
#define OV13858_ANA_GAIN_MAX            0x1fff
#define OV13858_ANA_GAIN_STEP           1
#define OV13858_ANA_GAIN_DEFAULT        0x80

/* Digital gain control */
#define OV13858_REG_B_MWB_GAIN          0x5100
#define OV13858_REG_G_MWB_GAIN          0x5102
#define OV13858_REG_R_MWB_GAIN          0x5104
#define OV13858_DGTL_GAIN_MIN           0
#define OV13858_DGTL_GAIN_MAX           16384   /* Max = 16 X */
#define OV13858_DGTL_GAIN_DEFAULT       1024    /* Default gain = 1 X */
#define OV13858_DGTL_GAIN_STEP          1       /* Each step = 1/1024 */

/* Test Pattern Control */
#define OV13858_REG_TEST_PATTERN        0x4503
#define OV13858_TEST_PATTERN_ENABLE     BIT(7)
#define OV13858_TEST_PATTERN_MASK       0xfc

/* Number of frames to skip */
#define OV13858_NUM_OF_SKIP_FRAMES      2

struct ov13858_reg {
        u16 address;
        u8 val;
};

struct ov13858_reg_list {
        u32 num_of_regs;
        const struct ov13858_reg *regs;
};

/* Link frequency config */
struct ov13858_link_freq_config {
        u32 pixels_per_line;

        /* PLL registers for this link frequency */
        struct ov13858_reg_list reg_list;
};

/* Mode : resolution and related config&values */
struct ov13858_mode {
        /* Frame width */
        u32 width;
        /* Frame height */
        u32 height;

        /* V-timing */
        u32 vts_def;
        u32 vts_min;

        /* Index of Link frequency config to be used */
        u32 link_freq_index;
        /* Default register values */
        struct ov13858_reg_list reg_list;
};

/* 4224x3136 needs 1080Mbps/lane, 4 lanes */
static const struct ov13858_reg mipi_data_rate_1080mbps[] = {
        /* PLL1 registers */
        {OV13858_REG_PLL1_CTRL_0, 0x07},
        {OV13858_REG_PLL1_CTRL_1, 0x01},
        {OV13858_REG_PLL1_CTRL_2, 0xc2},
        {OV13858_REG_PLL1_CTRL_3, 0x00},
        {OV13858_REG_PLL1_CTRL_4, 0x00},
        {OV13858_REG_PLL1_CTRL_5, 0x01},

        /* PLL2 registers */
        {OV13858_REG_PLL2_CTRL_B, 0x05},
        {OV13858_REG_PLL2_CTRL_C, 0x01},
        {OV13858_REG_PLL2_CTRL_D, 0x0e},
        {OV13858_REG_PLL2_CTRL_E, 0x05},
        {OV13858_REG_PLL2_CTRL_F, 0x01},
        {OV13858_REG_PLL2_CTRL_12, 0x01},
        {OV13858_REG_MIPI_SC_CTRL0, 0x72},
        {OV13858_REG_MIPI_SC_CTRL1, 0x01},
};

/*
 * 2112x1568, 2112x1188, 1056x784 need 540Mbps/lane,
 * 4 lanes
 */
static const struct ov13858_reg mipi_data_rate_540mbps[] = {
        /* PLL1 registers */
        {OV13858_REG_PLL1_CTRL_0, 0x07},
        {OV13858_REG_PLL1_CTRL_1, 0x01},
        {OV13858_REG_PLL1_CTRL_2, 0xc2},
        {OV13858_REG_PLL1_CTRL_3, 0x01},
        {OV13858_REG_PLL1_CTRL_4, 0x00},
        {OV13858_REG_PLL1_CTRL_5, 0x01},

        /* PLL2 registers */
        {OV13858_REG_PLL2_CTRL_B, 0x05},
        {OV13858_REG_PLL2_CTRL_C, 0x01},
        {OV13858_REG_PLL2_CTRL_D, 0x0e},
        {OV13858_REG_PLL2_CTRL_E, 0x05},
        {OV13858_REG_PLL2_CTRL_F, 0x01},
        {OV13858_REG_PLL2_CTRL_12, 0x01},
        {OV13858_REG_MIPI_SC_CTRL0, 0x72},
        {OV13858_REG_MIPI_SC_CTRL1, 0x01},
};

static const struct ov13858_reg mode_4224x3136_regs[] = {
        {0x3013, 0x32},
        {0x301b, 0xf0},
        {0x301f, 0xd0},
        {0x3106, 0x15},
        {0x3107, 0x23},
        {0x350a, 0x00},
        {0x350e, 0x00},
        {0x3510, 0x00},
        {0x3511, 0x02},
        {0x3512, 0x00},
        {0x3600, 0x2b},
        {0x3601, 0x52},
        {0x3602, 0x60},
        {0x3612, 0x05},
        {0x3613, 0xa4},
        {0x3620, 0x80},
        {0x3621, 0x10},
        {0x3622, 0x30},
        {0x3624, 0x1c},
        {0x3640, 0x10},
        {0x3641, 0x70},
        {0x3660, 0x04},
        {0x3661, 0x80},
        {0x3662, 0x12},
        {0x3664, 0x73},
        {0x3665, 0xa7},
        {0x366e, 0xff},
        {0x366f, 0xf4},
        {0x3674, 0x00},
        {0x3679, 0x0c},
        {0x367f, 0x01},
        {0x3680, 0x0c},
        {0x3681, 0x50},
        {0x3682, 0x50},
        {0x3683, 0xa9},
        {0x3684, 0xa9},
        {0x3709, 0x5f},
        {0x3714, 0x24},
        {0x371a, 0x3e},
        {0x3737, 0x04},
        {0x3738, 0xcc},
        {0x3739, 0x12},
        {0x373d, 0x26},
        {0x3764, 0x20},
        {0x3765, 0x20},
        {0x37a1, 0x36},
        {0x37a8, 0x3b},
        {0x37ab, 0x31},
        {0x37c2, 0x04},
        {0x37c3, 0xf1},
        {0x37c5, 0x00},
        {0x37d8, 0x03},
        {0x37d9, 0x0c},
        {0x37da, 0xc2},
        {0x37dc, 0x02},
        {0x37e0, 0x00},
        {0x37e1, 0x0a},
        {0x37e2, 0x14},
        {0x37e3, 0x04},
        {0x37e4, 0x2a},
        {0x37e5, 0x03},
        {0x37e6, 0x04},
        {0x3800, 0x00},
        {0x3801, 0x00},
        {0x3802, 0x00},
        {0x3803, 0x08},
        {0x3804, 0x10},
        {0x3805, 0x9f},
        {0x3806, 0x0c},
        {0x3807, 0x57},
        {0x3808, 0x10},
        {0x3809, 0x80},
        {0x380a, 0x0c},
        {0x380b, 0x40},
        {0x380c, 0x04},
        {0x380d, 0x62},
        {0x380e, 0x0c},
        {0x380f, 0x8e},
        {0x3811, 0x04},
        {0x3813, 0x05},
        {0x3814, 0x01},
        {0x3815, 0x01},
        {0x3816, 0x01},
        {0x3817, 0x01},
        {0x3820, 0xa8},
        {0x3821, 0x00},
        {0x3822, 0xc2},
        {0x3823, 0x18},
        {0x3826, 0x11},
        {0x3827, 0x1c},
        {0x3829, 0x03},
        {0x3832, 0x00},
        {0x3c80, 0x00},
        {0x3c87, 0x01},
        {0x3c8c, 0x19},
        {0x3c8d, 0x1c},
        {0x3c90, 0x00},
        {0x3c91, 0x00},
        {0x3c92, 0x00},
        {0x3c93, 0x00},
        {0x3c94, 0x40},
        {0x3c95, 0x54},
        {0x3c96, 0x34},
        {0x3c97, 0x04},
        {0x3c98, 0x00},
        {0x3d8c, 0x73},
        {0x3d8d, 0xc0},
        {0x3f00, 0x0b},
        {0x3f03, 0x00},
        {0x4001, 0xe0},
        {0x4008, 0x00},
        {0x4009, 0x0f},
        {0x4011, 0xf0},
        {0x4017, 0x08},
        {0x4050, 0x04},
        {0x4051, 0x0b},
        {0x4052, 0x00},
        {0x4053, 0x80},
        {0x4054, 0x00},
        {0x4055, 0x80},
        {0x4056, 0x00},
        {0x4057, 0x80},
        {0x4058, 0x00},
        {0x4059, 0x80},
        {0x405e, 0x20},
        {0x4500, 0x07},
        {0x4503, 0x00},
        {0x450a, 0x04},
        {0x4809, 0x04},
        {0x480c, 0x12},
        {0x481f, 0x30},
        {0x4833, 0x10},
        {0x4837, 0x0e},
        {0x4902, 0x01},
        {0x4d00, 0x03},
        {0x4d01, 0xc9},
        {0x4d02, 0xbc},
        {0x4d03, 0xd7},
        {0x4d04, 0xf0},
        {0x4d05, 0xa2},
        {0x5000, 0xfd},
        {0x5001, 0x01},
        {0x5040, 0x39},
        {0x5041, 0x10},
        {0x5042, 0x10},
        {0x5043, 0x84},
        {0x5044, 0x62},
        {0x5180, 0x00},
        {0x5181, 0x10},
        {0x5182, 0x02},
        {0x5183, 0x0f},
        {0x5200, 0x1b},
        {0x520b, 0x07},
        {0x520c, 0x0f},
        {0x5300, 0x04},
        {0x5301, 0x0c},
        {0x5302, 0x0c},
        {0x5303, 0x0f},
        {0x5304, 0x00},
        {0x5305, 0x70},
        {0x5306, 0x00},
        {0x5307, 0x80},
        {0x5308, 0x00},
        {0x5309, 0xa5},
        {0x530a, 0x00},
        {0x530b, 0xd3},
        {0x530c, 0x00},
        {0x530d, 0xf0},
        {0x530e, 0x01},
        {0x530f, 0x10},
        {0x5310, 0x01},
        {0x5311, 0x20},
        {0x5312, 0x01},
        {0x5313, 0x20},
        {0x5314, 0x01},
        {0x5315, 0x20},
        {0x5316, 0x08},
        {0x5317, 0x08},
        {0x5318, 0x10},
        {0x5319, 0x88},
        {0x531a, 0x88},
        {0x531b, 0xa9},
        {0x531c, 0xaa},
        {0x531d, 0x0a},
        {0x5405, 0x02},
        {0x5406, 0x67},
        {0x5407, 0x01},
        {0x5408, 0x4a},
};

static const struct ov13858_reg mode_2112x1568_regs[] = {
        {0x3013, 0x32},
        {0x301b, 0xf0},
        {0x301f, 0xd0},
        {0x3106, 0x15},
        {0x3107, 0x23},
        {0x350a, 0x00},
        {0x350e, 0x00},
        {0x3510, 0x00},
        {0x3511, 0x02},
        {0x3512, 0x00},
        {0x3600, 0x2b},
        {0x3601, 0x52},
        {0x3602, 0x60},
        {0x3612, 0x05},
        {0x3613, 0xa4},
        {0x3620, 0x80},
        {0x3621, 0x10},
        {0x3622, 0x30},
        {0x3624, 0x1c},
        {0x3640, 0x10},
        {0x3641, 0x70},
        {0x3660, 0x04},
        {0x3661, 0x80},
        {0x3662, 0x10},
        {0x3664, 0x73},
        {0x3665, 0xa7},
        {0x366e, 0xff},
        {0x366f, 0xf4},
        {0x3674, 0x00},
        {0x3679, 0x0c},
        {0x367f, 0x01},
        {0x3680, 0x0c},
        {0x3681, 0x50},
        {0x3682, 0x50},
        {0x3683, 0xa9},
        {0x3684, 0xa9},
        {0x3709, 0x5f},
        {0x3714, 0x28},
        {0x371a, 0x3e},
        {0x3737, 0x08},
        {0x3738, 0xcc},
        {0x3739, 0x20},
        {0x373d, 0x26},
        {0x3764, 0x20},
        {0x3765, 0x20},
        {0x37a1, 0x36},
        {0x37a8, 0x3b},
        {0x37ab, 0x31},
        {0x37c2, 0x14},
        {0x37c3, 0xf1},
        {0x37c5, 0x00},
        {0x37d8, 0x03},
        {0x37d9, 0x0c},
        {0x37da, 0xc2},
        {0x37dc, 0x02},
        {0x37e0, 0x00},
        {0x37e1, 0x0a},
        {0x37e2, 0x14},
        {0x37e3, 0x08},
        {0x37e4, 0x38},
        {0x37e5, 0x03},
        {0x37e6, 0x08},
        {0x3800, 0x00},
        {0x3801, 0x00},
        {0x3802, 0x00},
        {0x3803, 0x00},
        {0x3804, 0x10},
        {0x3805, 0x9f},
        {0x3806, 0x0c},
        {0x3807, 0x5f},
        {0x3808, 0x08},
        {0x3809, 0x40},
        {0x380a, 0x06},
        {0x380b, 0x20},
        {0x380c, 0x04},
        {0x380d, 0x62},
        {0x380e, 0x0c},
        {0x380f, 0x8e},
        {0x3811, 0x04},
        {0x3813, 0x05},
        {0x3814, 0x03},
        {0x3815, 0x01},
        {0x3816, 0x03},
        {0x3817, 0x01},
        {0x3820, 0xab},
        {0x3821, 0x00},
        {0x3822, 0xc2},
        {0x3823, 0x18},
        {0x3826, 0x04},
        {0x3827, 0x90},
        {0x3829, 0x07},
        {0x3832, 0x00},
        {0x3c80, 0x00},
        {0x3c87, 0x01},
        {0x3c8c, 0x19},
        {0x3c8d, 0x1c},
        {0x3c90, 0x00},
        {0x3c91, 0x00},
        {0x3c92, 0x00},
        {0x3c93, 0x00},
        {0x3c94, 0x40},
        {0x3c95, 0x54},
        {0x3c96, 0x34},
        {0x3c97, 0x04},
        {0x3c98, 0x00},
        {0x3d8c, 0x73},
        {0x3d8d, 0xc0},
        {0x3f00, 0x0b},
        {0x3f03, 0x00},
        {0x4001, 0xe0},
        {0x4008, 0x00},
        {0x4009, 0x0d},
        {0x4011, 0xf0},
        {0x4017, 0x08},
        {0x4050, 0x04},
        {0x4051, 0x0b},
        {0x4052, 0x00},
        {0x4053, 0x80},
        {0x4054, 0x00},
        {0x4055, 0x80},
        {0x4056, 0x00},
        {0x4057, 0x80},
        {0x4058, 0x00},
        {0x4059, 0x80},
        {0x405e, 0x20},
        {0x4500, 0x07},
        {0x4503, 0x00},
        {0x450a, 0x04},
        {0x4809, 0x04},
        {0x480c, 0x12},
        {0x481f, 0x30},
        {0x4833, 0x10},
        {0x4837, 0x1c},
        {0x4902, 0x01},
        {0x4d00, 0x03},
        {0x4d01, 0xc9},
        {0x4d02, 0xbc},
        {0x4d03, 0xd7},
        {0x4d04, 0xf0},
        {0x4d05, 0xa2},
        {0x5000, 0xfd},
        {0x5001, 0x01},
        {0x5040, 0x39},
        {0x5041, 0x10},
        {0x5042, 0x10},
        {0x5043, 0x84},
        {0x5044, 0x62},
        {0x5180, 0x00},
        {0x5181, 0x10},
        {0x5182, 0x02},
        {0x5183, 0x0f},
        {0x5200, 0x1b},
        {0x520b, 0x07},
        {0x520c, 0x0f},
        {0x5300, 0x04},
        {0x5301, 0x0c},
        {0x5302, 0x0c},
        {0x5303, 0x0f},
        {0x5304, 0x00},
        {0x5305, 0x70},
        {0x5306, 0x00},
        {0x5307, 0x80},
        {0x5308, 0x00},
        {0x5309, 0xa5},
        {0x530a, 0x00},
        {0x530b, 0xd3},
        {0x530c, 0x00},
        {0x530d, 0xf0},
        {0x530e, 0x01},
        {0x530f, 0x10},
        {0x5310, 0x01},
        {0x5311, 0x20},
        {0x5312, 0x01},
        {0x5313, 0x20},
        {0x5314, 0x01},
        {0x5315, 0x20},
        {0x5316, 0x08},
        {0x5317, 0x08},
        {0x5318, 0x10},
        {0x5319, 0x88},
        {0x531a, 0x88},
        {0x531b, 0xa9},
        {0x531c, 0xaa},
        {0x531d, 0x0a},
        {0x5405, 0x02},
        {0x5406, 0x67},
        {0x5407, 0x01},
        {0x5408, 0x4a},
};

static const struct ov13858_reg mode_2112x1188_regs[] = {
        {0x3013, 0x32},
        {0x301b, 0xf0},
        {0x301f, 0xd0},
        {0x3106, 0x15},
        {0x3107, 0x23},
        {0x350a, 0x00},
        {0x350e, 0x00},
        {0x3510, 0x00},
        {0x3511, 0x02},
        {0x3512, 0x00},
        {0x3600, 0x2b},
        {0x3601, 0x52},
        {0x3602, 0x60},
        {0x3612, 0x05},
        {0x3613, 0xa4},
        {0x3620, 0x80},
        {0x3621, 0x10},
        {0x3622, 0x30},
        {0x3624, 0x1c},
        {0x3640, 0x10},
        {0x3641, 0x70},
        {0x3660, 0x04},
        {0x3661, 0x80},
        {0x3662, 0x10},
        {0x3664, 0x73},
        {0x3665, 0xa7},
        {0x366e, 0xff},
        {0x366f, 0xf4},
        {0x3674, 0x00},
        {0x3679, 0x0c},
        {0x367f, 0x01},
        {0x3680, 0x0c},
        {0x3681, 0x50},
        {0x3682, 0x50},
        {0x3683, 0xa9},
        {0x3684, 0xa9},
        {0x3709, 0x5f},
        {0x3714, 0x28},
        {0x371a, 0x3e},
        {0x3737, 0x08},
        {0x3738, 0xcc},
        {0x3739, 0x20},
        {0x373d, 0x26},
        {0x3764, 0x20},
        {0x3765, 0x20},
        {0x37a1, 0x36},
        {0x37a8, 0x3b},
        {0x37ab, 0x31},
        {0x37c2, 0x14},
        {0x37c3, 0xf1},
        {0x37c5, 0x00},
        {0x37d8, 0x03},
        {0x37d9, 0x0c},
        {0x37da, 0xc2},
        {0x37dc, 0x02},
        {0x37e0, 0x00},
        {0x37e1, 0x0a},
        {0x37e2, 0x14},
        {0x37e3, 0x08},
        {0x37e4, 0x38},
        {0x37e5, 0x03},
        {0x37e6, 0x08},
        {0x3800, 0x00},
        {0x3801, 0x00},
        {0x3802, 0x01},
        {0x3803, 0x84},
        {0x3804, 0x10},
        {0x3805, 0x9f},
        {0x3806, 0x0a},
        {0x3807, 0xd3},
        {0x3808, 0x08},
        {0x3809, 0x40},
        {0x380a, 0x04},
        {0x380b, 0xa4},
        {0x380c, 0x04},
        {0x380d, 0x62},
        {0x380e, 0x0c},
        {0x380f, 0x8e},
        {0x3811, 0x08},
        {0x3813, 0x03},
        {0x3814, 0x03},
        {0x3815, 0x01},
        {0x3816, 0x03},
        {0x3817, 0x01},
        {0x3820, 0xab},
        {0x3821, 0x00},
        {0x3822, 0xc2},
        {0x3823, 0x18},
        {0x3826, 0x04},
        {0x3827, 0x90},
        {0x3829, 0x07},
        {0x3832, 0x00},
        {0x3c80, 0x00},
        {0x3c87, 0x01},
        {0x3c8c, 0x19},
        {0x3c8d, 0x1c},
        {0x3c90, 0x00},
        {0x3c91, 0x00},
        {0x3c92, 0x00},
        {0x3c93, 0x00},
        {0x3c94, 0x40},
        {0x3c95, 0x54},
        {0x3c96, 0x34},
        {0x3c97, 0x04},
        {0x3c98, 0x00},
        {0x3d8c, 0x73},
        {0x3d8d, 0xc0},
        {0x3f00, 0x0b},
        {0x3f03, 0x00},
        {0x4001, 0xe0},
        {0x4008, 0x00},
        {0x4009, 0x0d},
        {0x4011, 0xf0},
        {0x4017, 0x08},
        {0x4050, 0x04},
        {0x4051, 0x0b},
        {0x4052, 0x00},
        {0x4053, 0x80},
        {0x4054, 0x00},
        {0x4055, 0x80},
        {0x4056, 0x00},
        {0x4057, 0x80},
        {0x4058, 0x00},
        {0x4059, 0x80},
        {0x405e, 0x20},
        {0x4500, 0x07},
        {0x4503, 0x00},
        {0x450a, 0x04},
        {0x4809, 0x04},
        {0x480c, 0x12},
        {0x481f, 0x30},
        {0x4833, 0x10},
        {0x4837, 0x1c},
        {0x4902, 0x01},
        {0x4d00, 0x03},
        {0x4d01, 0xc9},
        {0x4d02, 0xbc},
        {0x4d03, 0xd7},
        {0x4d04, 0xf0},
        {0x4d05, 0xa2},
        {0x5000, 0xfd},
        {0x5001, 0x01},
        {0x5040, 0x39},
        {0x5041, 0x10},
        {0x5042, 0x10},
        {0x5043, 0x84},
        {0x5044, 0x62},
        {0x5180, 0x00},
        {0x5181, 0x10},
        {0x5182, 0x02},
        {0x5183, 0x0f},
        {0x5200, 0x1b},
        {0x520b, 0x07},
        {0x520c, 0x0f},
        {0x5300, 0x04},
        {0x5301, 0x0c},
        {0x5302, 0x0c},
        {0x5303, 0x0f},
        {0x5304, 0x00},
        {0x5305, 0x70},
        {0x5306, 0x00},
        {0x5307, 0x80},
        {0x5308, 0x00},
        {0x5309, 0xa5},
        {0x530a, 0x00},
        {0x530b, 0xd3},
        {0x530c, 0x00},
        {0x530d, 0xf0},
        {0x530e, 0x01},
        {0x530f, 0x10},
        {0x5310, 0x01},
        {0x5311, 0x20},
        {0x5312, 0x01},
        {0x5313, 0x20},
        {0x5314, 0x01},
        {0x5315, 0x20},
        {0x5316, 0x08},
        {0x5317, 0x08},
        {0x5318, 0x10},
        {0x5319, 0x88},
        {0x531a, 0x88},
        {0x531b, 0xa9},
        {0x531c, 0xaa},
        {0x531d, 0x0a},
        {0x5405, 0x02},
        {0x5406, 0x67},
        {0x5407, 0x01},
        {0x5408, 0x4a},
};

static const struct ov13858_reg mode_1056x784_regs[] = {
        {0x3013, 0x32},
        {0x301b, 0xf0},
        {0x301f, 0xd0},
        {0x3106, 0x15},
        {0x3107, 0x23},
        {0x350a, 0x00},
        {0x350e, 0x00},
        {0x3510, 0x00},
        {0x3511, 0x02},
        {0x3512, 0x00},
        {0x3600, 0x2b},
        {0x3601, 0x52},
        {0x3602, 0x60},
        {0x3612, 0x05},
        {0x3613, 0xa4},
        {0x3620, 0x80},
        {0x3621, 0x10},
        {0x3622, 0x30},
        {0x3624, 0x1c},
        {0x3640, 0x10},
        {0x3641, 0x70},
        {0x3660, 0x04},
        {0x3661, 0x80},
        {0x3662, 0x08},
        {0x3664, 0x73},
        {0x3665, 0xa7},
        {0x366e, 0xff},
        {0x366f, 0xf4},
        {0x3674, 0x00},
        {0x3679, 0x0c},
        {0x367f, 0x01},
        {0x3680, 0x0c},
        {0x3681, 0x50},
        {0x3682, 0x50},
        {0x3683, 0xa9},
        {0x3684, 0xa9},
        {0x3709, 0x5f},
        {0x3714, 0x30},
        {0x371a, 0x3e},
        {0x3737, 0x08},
        {0x3738, 0xcc},
        {0x3739, 0x20},
        {0x373d, 0x26},
        {0x3764, 0x20},
        {0x3765, 0x20},
        {0x37a1, 0x36},
        {0x37a8, 0x3b},
        {0x37ab, 0x31},
        {0x37c2, 0x2c},
        {0x37c3, 0xf1},
        {0x37c5, 0x00},
        {0x37d8, 0x03},
        {0x37d9, 0x06},
        {0x37da, 0xc2},
        {0x37dc, 0x02},
        {0x37e0, 0x00},
        {0x37e1, 0x0a},
        {0x37e2, 0x14},
        {0x37e3, 0x08},
        {0x37e4, 0x36},
        {0x37e5, 0x03},
        {0x37e6, 0x08},
        {0x3800, 0x00},
        {0x3801, 0x00},
        {0x3802, 0x00},
        {0x3803, 0x00},
        {0x3804, 0x10},
        {0x3805, 0x9f},
        {0x3806, 0x0c},
        {0x3807, 0x5f},
        {0x3808, 0x04},
        {0x3809, 0x20},
        {0x380a, 0x03},
        {0x380b, 0x10},
        {0x380c, 0x04},
        {0x380d, 0x62},
        {0x380e, 0x0c},
        {0x380f, 0x8e},
        {0x3811, 0x04},
        {0x3813, 0x05},
        {0x3814, 0x07},
        {0x3815, 0x01},
        {0x3816, 0x07},
        {0x3817, 0x01},
        {0x3820, 0xac},
        {0x3821, 0x00},
        {0x3822, 0xc2},
        {0x3823, 0x18},
        {0x3826, 0x04},
        {0x3827, 0x48},
        {0x3829, 0x03},
        {0x3832, 0x00},
        {0x3c80, 0x00},
        {0x3c87, 0x01},
        {0x3c8c, 0x19},
        {0x3c8d, 0x1c},
        {0x3c90, 0x00},
        {0x3c91, 0x00},
        {0x3c92, 0x00},
        {0x3c93, 0x00},
        {0x3c94, 0x40},
        {0x3c95, 0x54},
        {0x3c96, 0x34},
        {0x3c97, 0x04},
        {0x3c98, 0x00},
        {0x3d8c, 0x73},
        {0x3d8d, 0xc0},
        {0x3f00, 0x0b},
        {0x3f03, 0x00},
        {0x4001, 0xe0},
        {0x4008, 0x00},
        {0x4009, 0x05},
        {0x4011, 0xf0},
        {0x4017, 0x08},
        {0x4050, 0x02},
        {0x4051, 0x05},
        {0x4052, 0x00},
        {0x4053, 0x80},
        {0x4054, 0x00},
        {0x4055, 0x80},
        {0x4056, 0x00},
        {0x4057, 0x80},
        {0x4058, 0x00},
        {0x4059, 0x80},
        {0x405e, 0x20},
        {0x4500, 0x07},
        {0x4503, 0x00},
        {0x450a, 0x04},
        {0x4809, 0x04},
        {0x480c, 0x12},
        {0x481f, 0x30},
        {0x4833, 0x10},
        {0x4837, 0x1e},
        {0x4902, 0x02},
        {0x4d00, 0x03},
        {0x4d01, 0xc9},
        {0x4d02, 0xbc},
        {0x4d03, 0xd7},
        {0x4d04, 0xf0},
        {0x4d05, 0xa2},
        {0x5000, 0xfd},
        {0x5001, 0x01},
        {0x5040, 0x39},
        {0x5041, 0x10},
        {0x5042, 0x10},
        {0x5043, 0x84},
        {0x5044, 0x62},
        {0x5180, 0x00},
        {0x5181, 0x10},
        {0x5182, 0x02},
        {0x5183, 0x0f},
        {0x5200, 0x1b},
        {0x520b, 0x07},
        {0x520c, 0x0f},
        {0x5300, 0x04},
        {0x5301, 0x0c},
        {0x5302, 0x0c},
        {0x5303, 0x0f},
        {0x5304, 0x00},
        {0x5305, 0x70},
        {0x5306, 0x00},
        {0x5307, 0x80},
        {0x5308, 0x00},
        {0x5309, 0xa5},
        {0x530a, 0x00},
        {0x530b, 0xd3},
        {0x530c, 0x00},
        {0x530d, 0xf0},
        {0x530e, 0x01},
        {0x530f, 0x10},
        {0x5310, 0x01},
        {0x5311, 0x20},
        {0x5312, 0x01},
        {0x5313, 0x20},
        {0x5314, 0x01},
        {0x5315, 0x20},
        {0x5316, 0x08},
        {0x5317, 0x08},
        {0x5318, 0x10},
        {0x5319, 0x88},
        {0x531a, 0x88},
        {0x531b, 0xa9},
        {0x531c, 0xaa},
        {0x531d, 0x0a},
        {0x5405, 0x02},
        {0x5406, 0x67},
        {0x5407, 0x01},
        {0x5408, 0x4a},
};

static const char * const ov13858_test_pattern_menu[] = {
        "Disabled",
        "Vertical Color Bar Type 1",
        "Vertical Color Bar Type 2",
        "Vertical Color Bar Type 3",
        "Vertical Color Bar Type 4"
};

/* Configurations for supported link frequencies */
#define OV13858_NUM_OF_LINK_FREQS       2
#define OV13858_LINK_FREQ_540MHZ        540000000ULL
#define OV13858_LINK_FREQ_270MHZ        270000000ULL
#define OV13858_LINK_FREQ_INDEX_0       0
#define OV13858_LINK_FREQ_INDEX_1       1

/*
 * pixel_rate = link_freq * data-rate * nr_of_lanes / bits_per_sample
 * data rate => double data rate; number of lanes => 4; bits per pixel => 10
 */
static u64 link_freq_to_pixel_rate(u64 f)
{
        f *= 2 * 4;
        do_div(f, 10);

        return f;
}

/* Menu items for LINK_FREQ V4L2 control */
static const s64 link_freq_menu_items[OV13858_NUM_OF_LINK_FREQS] = {
        OV13858_LINK_FREQ_540MHZ,
        OV13858_LINK_FREQ_270MHZ
};

/* Link frequency configs */
static const struct ov13858_link_freq_config
                        link_freq_configs[OV13858_NUM_OF_LINK_FREQS] = {
        {
                .pixels_per_line = OV13858_PPL_540MHZ,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mipi_data_rate_1080mbps),
                        .regs = mipi_data_rate_1080mbps,
                }
        },
        {
                .pixels_per_line = OV13858_PPL_270MHZ,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mipi_data_rate_540mbps),
                        .regs = mipi_data_rate_540mbps,
                }
        }
};

/* Mode configs */
static const struct ov13858_mode supported_modes[] = {
        {
                .width = 4224,
                .height = 3136,
                .vts_def = OV13858_VTS_30FPS,
                .vts_min = OV13858_VTS_30FPS,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mode_4224x3136_regs),
                        .regs = mode_4224x3136_regs,
                },
                .link_freq_index = OV13858_LINK_FREQ_INDEX_0,
        },
        {
                .width = 2112,
                .height = 1568,
                .vts_def = OV13858_VTS_30FPS,
                .vts_min = 1608,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mode_2112x1568_regs),
                        .regs = mode_2112x1568_regs,
                },
                .link_freq_index = OV13858_LINK_FREQ_INDEX_1,
        },
        {
                .width = 2112,
                .height = 1188,
                .vts_def = OV13858_VTS_30FPS,
                .vts_min = 1608,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mode_2112x1188_regs),
                        .regs = mode_2112x1188_regs,
                },
                .link_freq_index = OV13858_LINK_FREQ_INDEX_1,
        },
        {
                .width = 1056,
                .height = 784,
                .vts_def = OV13858_VTS_30FPS,
                .vts_min = 804,
                .reg_list = {
                        .num_of_regs = ARRAY_SIZE(mode_1056x784_regs),
                        .regs = mode_1056x784_regs,
                },
                .link_freq_index = OV13858_LINK_FREQ_INDEX_1,
        }
};

struct ov13858 {
        struct device *dev;
        struct clk *clk;

        struct v4l2_subdev sd;
        struct media_pad pad;

        struct v4l2_ctrl_handler ctrl_handler;
        /* V4L2 Controls */
        struct v4l2_ctrl *link_freq;
        struct v4l2_ctrl *pixel_rate;
        struct v4l2_ctrl *vblank;
        struct v4l2_ctrl *hblank;
        struct v4l2_ctrl *exposure;

        /* Current mode */
        const struct ov13858_mode *cur_mode;

        /* Mutex for serialized access */
        struct mutex mutex;
};

#define to_ov13858(_sd) container_of(_sd, struct ov13858, sd)

/* Read registers up to 4 at a time */
static int ov13858_read_reg(struct ov13858 *ov13858, u16 reg, u32 len,
                            u32 *val)
{
        struct i2c_client *client = v4l2_get_subdevdata(&ov13858->sd);
        struct i2c_msg msgs[2];
        u8 *data_be_p;
        int ret;
        __be32 data_be = 0;
        __be16 reg_addr_be = cpu_to_be16(reg);

        if (len > 4)
                return -EINVAL;

        data_be_p = (u8 *)&data_be;
        /* Write register address */
        msgs[0].addr = client->addr;
        msgs[0].flags = 0;
        msgs[0].len = 2;
        msgs[0].buf = (u8 *)&reg_addr_be;

        /* Read data from register */
        msgs[1].addr = client->addr;
        msgs[1].flags = I2C_M_RD;
        msgs[1].len = len;
        msgs[1].buf = &data_be_p[4 - len];

        ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
        if (ret != ARRAY_SIZE(msgs))
                return -EIO;

        *val = be32_to_cpu(data_be);

        return 0;
}

/* Write registers up to 4 at a time */
static int ov13858_write_reg(struct ov13858 *ov13858, u16 reg, u32 len,
                             u32 __val)
{
        struct i2c_client *client = v4l2_get_subdevdata(&ov13858->sd);
        int buf_i, val_i;
        u8 buf[6], *val_p;
        __be32 val;

        if (len > 4)
                return -EINVAL;

        buf[0] = reg >> 8;
        buf[1] = reg & 0xff;

        val = cpu_to_be32(__val);
        val_p = (u8 *)&val;
        buf_i = 2;
        val_i = 4 - len;

        while (val_i < 4)
                buf[buf_i++] = val_p[val_i++];

        if (i2c_master_send(client, buf, len + 2) != len + 2)
                return -EIO;

        return 0;
}

/* Write a list of registers */
static int ov13858_write_regs(struct ov13858 *ov13858,
                              const struct ov13858_reg *regs, u32 len)
{
        int ret;
        u32 i;

        for (i = 0; i < len; i++) {
                ret = ov13858_write_reg(ov13858, regs[i].address, 1,
                                        regs[i].val);
                if (ret) {
                        dev_err_ratelimited(
                                ov13858->dev,
                                "Failed to write reg 0x%4.4x. error = %d\n",
                                regs[i].address, ret);

                        return ret;
                }
        }

        return 0;
}

static int ov13858_write_reg_list(struct ov13858 *ov13858,
                                  const struct ov13858_reg_list *r_list)
{
        return ov13858_write_regs(ov13858, r_list->regs, r_list->num_of_regs);
}

/* Open sub-device */
static int ov13858_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
        struct ov13858 *ov13858 = to_ov13858(sd);
        struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_state_get_format(fh->state,
                                                                          0);

        mutex_lock(&ov13858->mutex);

        /* Initialize try_fmt */
        try_fmt->width = ov13858->cur_mode->width;
        try_fmt->height = ov13858->cur_mode->height;
        try_fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
        try_fmt->field = V4L2_FIELD_NONE;

        /* No crop or compose */
        mutex_unlock(&ov13858->mutex);

        return 0;
}

static int ov13858_update_digital_gain(struct ov13858 *ov13858, u32 d_gain)
{
        int ret;

        ret = ov13858_write_reg(ov13858, OV13858_REG_B_MWB_GAIN,
                                OV13858_REG_VALUE_16BIT, d_gain);
        if (ret)
                return ret;

        ret = ov13858_write_reg(ov13858, OV13858_REG_G_MWB_GAIN,
                                OV13858_REG_VALUE_16BIT, d_gain);
        if (ret)
                return ret;

        ret = ov13858_write_reg(ov13858, OV13858_REG_R_MWB_GAIN,
                                OV13858_REG_VALUE_16BIT, d_gain);

        return ret;
}

static int ov13858_enable_test_pattern(struct ov13858 *ov13858, u32 pattern)
{
        int ret;
        u32 val;

        ret = ov13858_read_reg(ov13858, OV13858_REG_TEST_PATTERN,
                               OV13858_REG_VALUE_08BIT, &val);
        if (ret)
                return ret;

        if (pattern) {
                val &= OV13858_TEST_PATTERN_MASK;
                val |= (pattern - 1) | OV13858_TEST_PATTERN_ENABLE;
        } else {
                val &= ~OV13858_TEST_PATTERN_ENABLE;
        }

        return ov13858_write_reg(ov13858, OV13858_REG_TEST_PATTERN,
                                 OV13858_REG_VALUE_08BIT, val);
}

static int ov13858_set_ctrl(struct v4l2_ctrl *ctrl)
{
        struct ov13858 *ov13858 = container_of(ctrl->handler,
                                               struct ov13858, ctrl_handler);
        s64 max;
        int ret;

        /* Propagate change of current control to all related controls */
        switch (ctrl->id) {
        case V4L2_CID_VBLANK:
                /* Update max exposure while meeting expected vblanking */
                max = ov13858->cur_mode->height + ctrl->val - 8;
                __v4l2_ctrl_modify_range(ov13858->exposure,
                                         ov13858->exposure->minimum,
                                         max, ov13858->exposure->step, max);
                break;
        }

        /*
         * Applying V4L2 control value only happens
         * when power is up for streaming
         */
        if (!pm_runtime_get_if_in_use(ov13858->dev))
                return 0;

        ret = 0;
        switch (ctrl->id) {
        case V4L2_CID_ANALOGUE_GAIN:
                ret = ov13858_write_reg(ov13858, OV13858_REG_ANALOG_GAIN,
                                        OV13858_REG_VALUE_16BIT, ctrl->val);
                break;
        case V4L2_CID_DIGITAL_GAIN:
                ret = ov13858_update_digital_gain(ov13858, ctrl->val);
                break;
        case V4L2_CID_EXPOSURE:
                ret = ov13858_write_reg(ov13858, OV13858_REG_EXPOSURE,
                                        OV13858_REG_VALUE_24BIT,
                                        ctrl->val << 4);
                break;
        case V4L2_CID_VBLANK:
                /* Update VTS that meets expected vertical blanking */
                ret = ov13858_write_reg(ov13858, OV13858_REG_VTS,
                                        OV13858_REG_VALUE_16BIT,
                                        ov13858->cur_mode->height
                                          + ctrl->val);
                break;
        case V4L2_CID_TEST_PATTERN:
                ret = ov13858_enable_test_pattern(ov13858, ctrl->val);
                break;
        default:
                dev_info(ov13858->dev,
                         "ctrl(id:0x%x,val:0x%x) is not handled\n",
                         ctrl->id, ctrl->val);
                break;
        }

        pm_runtime_put(ov13858->dev);

        return ret;
}

static const struct v4l2_ctrl_ops ov13858_ctrl_ops = {
        .s_ctrl = ov13858_set_ctrl,
};

static int ov13858_enum_mbus_code(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_state *sd_state,
                                  struct v4l2_subdev_mbus_code_enum *code)
{
        /* Only one bayer order(GRBG) is supported */
        if (code->index > 0)
                return -EINVAL;

        code->code = MEDIA_BUS_FMT_SGRBG10_1X10;

        return 0;
}

static int ov13858_enum_frame_size(struct v4l2_subdev *sd,
                                   struct v4l2_subdev_state *sd_state,
                                   struct v4l2_subdev_frame_size_enum *fse)
{
        if (fse->index >= ARRAY_SIZE(supported_modes))
                return -EINVAL;

        if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
                return -EINVAL;

        fse->min_width = supported_modes[fse->index].width;
        fse->max_width = fse->min_width;
        fse->min_height = supported_modes[fse->index].height;
        fse->max_height = fse->min_height;

        return 0;
}

static void ov13858_update_pad_format(const struct ov13858_mode *mode,
                                      struct v4l2_subdev_format *fmt)
{
        fmt->format.width = mode->width;
        fmt->format.height = mode->height;
        fmt->format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
        fmt->format.field = V4L2_FIELD_NONE;
}

static int ov13858_do_get_pad_format(struct ov13858 *ov13858,
                                     struct v4l2_subdev_state *sd_state,
                                     struct v4l2_subdev_format *fmt)
{
        struct v4l2_mbus_framefmt *framefmt;

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
                fmt->format = *framefmt;
        } else {
                ov13858_update_pad_format(ov13858->cur_mode, fmt);
        }

        return 0;
}

static int ov13858_get_pad_format(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_state *sd_state,
                                  struct v4l2_subdev_format *fmt)
{
        struct ov13858 *ov13858 = to_ov13858(sd);
        int ret;

        mutex_lock(&ov13858->mutex);
        ret = ov13858_do_get_pad_format(ov13858, sd_state, fmt);
        mutex_unlock(&ov13858->mutex);

        return ret;
}

static int
ov13858_set_pad_format(struct v4l2_subdev *sd,
                       struct v4l2_subdev_state *sd_state,
                       struct v4l2_subdev_format *fmt)
{
        struct ov13858 *ov13858 = to_ov13858(sd);
        const struct ov13858_mode *mode;
        struct v4l2_mbus_framefmt *framefmt;
        s32 vblank_def;
        s32 vblank_min;
        s64 h_blank;
        s64 pixel_rate;
        s64 link_freq;

        mutex_lock(&ov13858->mutex);

        /* Only one raw bayer(GRBG) order is supported */
        if (fmt->format.code != MEDIA_BUS_FMT_SGRBG10_1X10)
                fmt->format.code = MEDIA_BUS_FMT_SGRBG10_1X10;

        mode = v4l2_find_nearest_size(supported_modes,
                                      ARRAY_SIZE(supported_modes),
                                      width, height,
                                      fmt->format.width, fmt->format.height);
        ov13858_update_pad_format(mode, fmt);
        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
                *framefmt = fmt->format;
        } else {
                ov13858->cur_mode = mode;
                __v4l2_ctrl_s_ctrl(ov13858->link_freq, mode->link_freq_index);
                link_freq = link_freq_menu_items[mode->link_freq_index];
                pixel_rate = link_freq_to_pixel_rate(link_freq);
                __v4l2_ctrl_s_ctrl_int64(ov13858->pixel_rate, pixel_rate);

                /* Update limits and set FPS to default */
                vblank_def = ov13858->cur_mode->vts_def -
                             ov13858->cur_mode->height;
                vblank_min = ov13858->cur_mode->vts_min -
                             ov13858->cur_mode->height;
                __v4l2_ctrl_modify_range(
                        ov13858->vblank, vblank_min,
                        OV13858_VTS_MAX - ov13858->cur_mode->height, 1,
                        vblank_def);
                __v4l2_ctrl_s_ctrl(ov13858->vblank, vblank_def);
                h_blank =
                        link_freq_configs[mode->link_freq_index].pixels_per_line
                         - ov13858->cur_mode->width;
                __v4l2_ctrl_modify_range(ov13858->hblank, h_blank,
                                         h_blank, 1, h_blank);
        }

        mutex_unlock(&ov13858->mutex);

        return 0;
}

static int ov13858_get_skip_frames(struct v4l2_subdev *sd, u32 *frames)
{
        *frames = OV13858_NUM_OF_SKIP_FRAMES;

        return 0;
}

/* Start streaming */
static int ov13858_start_streaming(struct ov13858 *ov13858)
{
        const struct ov13858_reg_list *reg_list;
        int ret, link_freq_index;

        /* Get out of from software reset */
        ret = ov13858_write_reg(ov13858, OV13858_REG_SOFTWARE_RST,
                                OV13858_REG_VALUE_08BIT, OV13858_SOFTWARE_RST);
        if (ret) {
                dev_err(ov13858->dev, "%s failed to set powerup registers\n",
                        __func__);
                return ret;
        }

        /* Setup PLL */
        link_freq_index = ov13858->cur_mode->link_freq_index;
        reg_list = &link_freq_configs[link_freq_index].reg_list;
        ret = ov13858_write_reg_list(ov13858, reg_list);
        if (ret) {
                dev_err(ov13858->dev, "%s failed to set plls\n", __func__);
                return ret;
        }

        /* Apply default values of current mode */
        reg_list = &ov13858->cur_mode->reg_list;
        ret = ov13858_write_reg_list(ov13858, reg_list);
        if (ret) {
                dev_err(ov13858->dev, "%s failed to set mode\n", __func__);
                return ret;
        }

        /* Apply customized values from user */
        ret =  __v4l2_ctrl_handler_setup(ov13858->sd.ctrl_handler);
        if (ret)
                return ret;

        return ov13858_write_reg(ov13858, OV13858_REG_MODE_SELECT,
                                 OV13858_REG_VALUE_08BIT,
                                 OV13858_MODE_STREAMING);
}

/* Stop streaming */
static int ov13858_stop_streaming(struct ov13858 *ov13858)
{
        return ov13858_write_reg(ov13858, OV13858_REG_MODE_SELECT,
                                 OV13858_REG_VALUE_08BIT, OV13858_MODE_STANDBY);
}

static int ov13858_set_stream(struct v4l2_subdev *sd, int enable)
{
        struct ov13858 *ov13858 = to_ov13858(sd);
        int ret = 0;

        mutex_lock(&ov13858->mutex);

        if (enable) {
                ret = pm_runtime_resume_and_get(ov13858->dev);
                if (ret < 0)
                        goto err_unlock;

                /*
                 * Apply default & customized values
                 * and then start streaming.
                 */
                ret = ov13858_start_streaming(ov13858);
                if (ret)
                        goto err_rpm_put;
        } else {
                ov13858_stop_streaming(ov13858);
                pm_runtime_put(ov13858->dev);
        }

        mutex_unlock(&ov13858->mutex);

        return ret;

err_rpm_put:
        pm_runtime_put(ov13858->dev);
err_unlock:
        mutex_unlock(&ov13858->mutex);

        return ret;
}

/* Verify chip ID */
static int ov13858_identify_module(struct ov13858 *ov13858)
{
        int ret;
        u32 val;

        ret = ov13858_read_reg(ov13858, OV13858_REG_CHIP_ID,
                               OV13858_REG_VALUE_24BIT, &val);
        if (ret)
                return ret;

        if (val != OV13858_CHIP_ID) {
                dev_err(ov13858->dev, "chip id mismatch: %x!=%x\n",
                        OV13858_CHIP_ID, val);
                return -EIO;
        }

        return 0;
}

static const struct v4l2_subdev_core_ops ov13858_core_ops = {
        .log_status = v4l2_ctrl_subdev_log_status,
        .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
        .unsubscribe_event = v4l2_event_subdev_unsubscribe,
};

static const struct v4l2_subdev_video_ops ov13858_video_ops = {
        .s_stream = ov13858_set_stream,
};

static const struct v4l2_subdev_pad_ops ov13858_pad_ops = {
        .enum_mbus_code = ov13858_enum_mbus_code,
        .get_fmt = ov13858_get_pad_format,
        .set_fmt = ov13858_set_pad_format,
        .enum_frame_size = ov13858_enum_frame_size,
};

static const struct v4l2_subdev_sensor_ops ov13858_sensor_ops = {
        .g_skip_frames = ov13858_get_skip_frames,
};

static const struct v4l2_subdev_ops ov13858_subdev_ops = {
        .core = &ov13858_core_ops,
        .video = &ov13858_video_ops,
        .pad = &ov13858_pad_ops,
        .sensor = &ov13858_sensor_ops,
};

static const struct media_entity_operations ov13858_subdev_entity_ops = {
        .link_validate = v4l2_subdev_link_validate,
};

static const struct v4l2_subdev_internal_ops ov13858_internal_ops = {
        .open = ov13858_open,
};

/* Initialize control handlers */
static int ov13858_init_controls(struct ov13858 *ov13858)
{
        struct v4l2_fwnode_device_properties props;
        struct v4l2_ctrl_handler *ctrl_hdlr;
        s64 exposure_max;
        s64 vblank_def;
        s64 vblank_min;
        s64 hblank;
        s64 pixel_rate_min;
        s64 pixel_rate_max;
        const struct ov13858_mode *mode;
        int ret;

        ctrl_hdlr = &ov13858->ctrl_handler;
        ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
        if (ret)
                return ret;

        mutex_init(&ov13858->mutex);
        ctrl_hdlr->lock = &ov13858->mutex;
        ov13858->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
                                &ov13858_ctrl_ops,
                                V4L2_CID_LINK_FREQ,
                                OV13858_NUM_OF_LINK_FREQS - 1,
                                0,
                                link_freq_menu_items);
        if (ov13858->link_freq)
                ov13858->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
        pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
        /* By default, PIXEL_RATE is read only */
        ov13858->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov13858_ctrl_ops,
                                                V4L2_CID_PIXEL_RATE,
                                                pixel_rate_min, pixel_rate_max,
                                                1, pixel_rate_max);

        mode = ov13858->cur_mode;
        vblank_def = mode->vts_def - mode->height;
        vblank_min = mode->vts_min - mode->height;
        ov13858->vblank = v4l2_ctrl_new_std(
                                ctrl_hdlr, &ov13858_ctrl_ops, V4L2_CID_VBLANK,
                                vblank_min, OV13858_VTS_MAX - mode->height, 1,
                                vblank_def);

        hblank = link_freq_configs[mode->link_freq_index].pixels_per_line -
                 mode->width;
        ov13858->hblank = v4l2_ctrl_new_std(
                                ctrl_hdlr, &ov13858_ctrl_ops, V4L2_CID_HBLANK,
                                hblank, hblank, 1, hblank);
        if (ov13858->hblank)
                ov13858->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        exposure_max = mode->vts_def - 8;
        ov13858->exposure = v4l2_ctrl_new_std(
                                ctrl_hdlr, &ov13858_ctrl_ops,
                                V4L2_CID_EXPOSURE, OV13858_EXPOSURE_MIN,
                                exposure_max, OV13858_EXPOSURE_STEP,
                                OV13858_EXPOSURE_DEFAULT);

        v4l2_ctrl_new_std(ctrl_hdlr, &ov13858_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
                          OV13858_ANA_GAIN_MIN, OV13858_ANA_GAIN_MAX,
                          OV13858_ANA_GAIN_STEP, OV13858_ANA_GAIN_DEFAULT);

        /* Digital gain */
        v4l2_ctrl_new_std(ctrl_hdlr, &ov13858_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
                          OV13858_DGTL_GAIN_MIN, OV13858_DGTL_GAIN_MAX,
                          OV13858_DGTL_GAIN_STEP, OV13858_DGTL_GAIN_DEFAULT);

        v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov13858_ctrl_ops,
                                     V4L2_CID_TEST_PATTERN,
                                     ARRAY_SIZE(ov13858_test_pattern_menu) - 1,
                                     0, 0, ov13858_test_pattern_menu);
        if (ctrl_hdlr->error) {
                ret = ctrl_hdlr->error;
                dev_err(ov13858->dev, "%s control init failed (%d)\n",
                        __func__, ret);
                goto error;
        }

        ret = v4l2_fwnode_device_parse(ov13858->dev, &props);
        if (ret)
                goto error;

        ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov13858_ctrl_ops,
                                              &props);
        if (ret)
                goto error;

        ov13858->sd.ctrl_handler = ctrl_hdlr;

        return 0;

error:
        v4l2_ctrl_handler_free(ctrl_hdlr);
        mutex_destroy(&ov13858->mutex);

        return ret;
}

static void ov13858_free_controls(struct ov13858 *ov13858)
{
        v4l2_ctrl_handler_free(ov13858->sd.ctrl_handler);
        mutex_destroy(&ov13858->mutex);
}

static int ov13858_probe(struct i2c_client *client)
{
        struct ov13858 *ov13858;
        unsigned long freq;
        int ret;

        ov13858 = devm_kzalloc(&client->dev, sizeof(*ov13858), GFP_KERNEL);
        if (!ov13858)
                return -ENOMEM;

        ov13858->dev = &client->dev;

        ov13858->clk = devm_v4l2_sensor_clk_get(ov13858->dev, NULL);
        if (IS_ERR(ov13858->clk))
                return dev_err_probe(ov13858->dev, PTR_ERR(ov13858->clk),
                                     "failed to get clock\n");

        freq = clk_get_rate(ov13858->clk);
        if (freq != 19200000)
                return dev_err_probe(ov13858->dev, -EINVAL,
                                     "external clock %lu is not supported\n",
                                     freq);

        /* Initialize subdev */
        v4l2_i2c_subdev_init(&ov13858->sd, client, &ov13858_subdev_ops);

        /* Check module identity */
        ret = ov13858_identify_module(ov13858);
        if (ret) {
                dev_err(ov13858->dev, "failed to find sensor: %d\n", ret);
                return ret;
        }

        /* Set default mode to max resolution */
        ov13858->cur_mode = &supported_modes[0];

        ret = ov13858_init_controls(ov13858);
        if (ret)
                return ret;

        /* Initialize subdev */
        ov13858->sd.internal_ops = &ov13858_internal_ops;
        ov13858->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
                             V4L2_SUBDEV_FL_HAS_EVENTS;
        ov13858->sd.entity.ops = &ov13858_subdev_entity_ops;
        ov13858->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;

        /* Initialize source pad */
        ov13858->pad.flags = MEDIA_PAD_FL_SOURCE;
        ret = media_entity_pads_init(&ov13858->sd.entity, 1, &ov13858->pad);
        if (ret) {
                dev_err(ov13858->dev, "%s failed:%d\n", __func__, ret);
                goto error_handler_free;
        }

        ret = v4l2_async_register_subdev_sensor(&ov13858->sd);
        if (ret < 0)
                goto error_media_entity;

        /*
         * Device is already turned on by i2c-core with ACPI domain PM.
         * Enable runtime PM and turn off the device.
         */
        pm_runtime_set_active(ov13858->dev);
        pm_runtime_enable(ov13858->dev);
        pm_runtime_idle(ov13858->dev);

        return 0;

error_media_entity:
        media_entity_cleanup(&ov13858->sd.entity);

error_handler_free:
        ov13858_free_controls(ov13858);
        dev_err(ov13858->dev, "%s failed:%d\n", __func__, ret);

        return ret;
}

static void ov13858_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct ov13858 *ov13858 = to_ov13858(sd);

        v4l2_async_unregister_subdev(sd);
        media_entity_cleanup(&sd->entity);
        ov13858_free_controls(ov13858);

        pm_runtime_disable(ov13858->dev);
}

static const struct i2c_device_id ov13858_id_table[] = {
        { "ov13858" },
        {}
};

MODULE_DEVICE_TABLE(i2c, ov13858_id_table);

#ifdef CONFIG_ACPI
static const struct acpi_device_id ov13858_acpi_ids[] = {
        {"OVTID858"},
        { /* sentinel */ }
};

MODULE_DEVICE_TABLE(acpi, ov13858_acpi_ids);
#endif

static struct i2c_driver ov13858_i2c_driver = {
        .driver = {
                .name = "ov13858",
                .acpi_match_table = ACPI_PTR(ov13858_acpi_ids),
        },
        .probe = ov13858_probe,
        .remove = ov13858_remove,
        .id_table = ov13858_id_table,
};

module_i2c_driver(ov13858_i2c_driver);

MODULE_AUTHOR("Kan, Chris <chris.kan@intel.com>");
MODULE_AUTHOR("Rapolu, Chiranjeevi");
MODULE_AUTHOR("Yang, Hyungwoo");
MODULE_DESCRIPTION("Omnivision ov13858 sensor driver");
MODULE_LICENSE("GPL v2");