path: root/drivers/media/i2c/ov5675.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Intel Corporation.

#include <linux/unaligned.h>
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>

#define OV5675_REG_VALUE_08BIT		1
#define OV5675_REG_VALUE_16BIT		2
#define OV5675_REG_VALUE_24BIT		3

#define OV5675_LINK_FREQ_450MHZ		450000000ULL
#define OV5675_SCLK			90000000LL
#define OV5675_XVCLK_19_2		19200000
#define OV5675_DATA_LANES		2
#define OV5675_RGB_DEPTH		10

#define OV5675_REG_CHIP_ID		0x300a
#define OV5675_CHIP_ID			0x5675

#define OV5675_REG_MODE_SELECT		0x0100
#define OV5675_MODE_STANDBY		0x00
#define OV5675_MODE_STREAMING		0x01

/* vertical-timings from sensor */
#define OV5675_REG_VTS			0x380e
#define OV5675_VTS_30FPS		0x07e4
#define OV5675_VTS_30FPS_MIN		0x07e4
#define OV5675_VTS_MAX			0x7fff

/* horizontal-timings from sensor */
#define OV5675_REG_HTS			0x380c

/* Exposure controls from sensor */
#define OV5675_REG_EXPOSURE		0x3500
#define	OV5675_EXPOSURE_MIN		4
#define OV5675_EXPOSURE_MAX_MARGIN	4
#define	OV5675_EXPOSURE_STEP		1

/* Analog gain controls from sensor */
#define OV5675_REG_ANALOG_GAIN		0x3508
#define	OV5675_ANAL_GAIN_MIN		128
#define	OV5675_ANAL_GAIN_MAX		2047
#define	OV5675_ANAL_GAIN_STEP		1

/* Digital gain controls from sensor */
#define OV5675_REG_DIGITAL_GAIN		0x350a
#define OV5675_REG_MWB_R_GAIN		0x5019
#define OV5675_REG_MWB_G_GAIN		0x501b
#define OV5675_REG_MWB_B_GAIN		0x501d
#define OV5675_DGTL_GAIN_MIN		1024
#define OV5675_DGTL_GAIN_MAX		4095
#define OV5675_DGTL_GAIN_STEP		1
#define OV5675_DGTL_GAIN_DEFAULT	1024

/* Group Access */
#define OV5675_REG_GROUP_ACCESS		0x3208
#define OV5675_GROUP_HOLD_START		0x0
#define OV5675_GROUP_HOLD_END		0x10
#define OV5675_GROUP_HOLD_LAUNCH	0xa0

/* Test Pattern Control */
#define OV5675_REG_TEST_PATTERN		0x4503
#define OV5675_TEST_PATTERN_ENABLE	BIT(7)
#define OV5675_TEST_PATTERN_BAR_SHIFT	2

/* Flip Mirror Controls from sensor */
#define OV5675_REG_FORMAT1		0x3820
#define OV5675_REG_FORMAT2		0x373d

#define to_ov5675(_sd)			container_of(_sd, struct ov5675, sd)

static const char * const ov5675_supply_names[] = {
	"avdd",		/* Analog power */
	"dovdd",	/* Digital I/O power */
	"dvdd",		/* Digital core power */
};

#define OV5675_NUM_SUPPLIES	ARRAY_SIZE(ov5675_supply_names)

enum {
	OV5675_LINK_FREQ_900MBPS,
};

struct ov5675_reg {
	u16 address;
	u8 val;
};

struct ov5675_reg_list {
	u32 num_of_regs;
	const struct ov5675_reg *regs;
};

struct ov5675_link_freq_config {
	const struct ov5675_reg_list reg_list;
};

struct ov5675_mode {
	/* Frame width in pixels */
	u32 width;

	/* Frame height in pixels */
	u32 height;

	/* Horizontal timining size */
	u32 hts;

	/* Default vertical timining size */
	u32 vts_def;

	/* Min vertical timining size */
	u32 vts_min;

	/* Link frequency needed for this resolution */
	u32 link_freq_index;

	/* Sensor register settings for this resolution */
	const struct ov5675_reg_list reg_list;
};

static const struct ov5675_reg mipi_data_rate_900mbps[] = {
	{0x0103, 0x01},
	{0x0100, 0x00},
	{0x0300