path: root/drivers/media/i2c/ov02a10.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 MediaTek Inc.

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/units.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>

#define OV02A10_ID					0x2509
#define OV02A10_ID_MASK					GENMASK(15, 0)

#define OV02A10_REG_CHIP_ID				0x02

/* Bit[1] vertical upside down */
/* Bit[0] horizontal mirror */
#define REG_MIRROR_FLIP_CONTROL				0x3f

/* Orientation */
#define REG_MIRROR_FLIP_ENABLE				0x03

/* Bit[2:0] MIPI transmission speed select */
#define TX_SPEED_AREA_SEL				0xa1
#define OV02A10_MIPI_TX_SPEED_DEFAULT			0x04

#define REG_PAGE_SWITCH					0xfd
#define REG_GLOBAL_EFFECTIVE				0x01
#define REG_ENABLE					BIT(0)

#define REG_SC_CTRL_MODE				0xac
#define SC_CTRL_MODE_STANDBY				0x00
#define SC_CTRL_MODE_STREAMING				0x01

/* Exposure control */
#define OV02A10_EXP_SHIFT				8
#define OV02A10_REG_EXPOSURE_H				0x03
#define OV02A10_REG_EXPOSURE_L				0x04
#define	OV02A10_EXPOSURE_MIN				4
#define OV02A10_EXPOSURE_MAX_MARGIN			4
#define	OV02A10_EXPOSURE_STEP				1

/* Vblanking control */
#define OV02A10_VTS_SHIFT				8
#define OV02A10_REG_VTS_H				0x05
#define OV02A10_REG_VTS_L				0x06
#define OV02A10_VTS_MAX					0x209f
#define OV02A10_BASE_LINES				1224

/* Analog gain control */
#define OV02A10_REG_GAIN				0x24
#define OV02A10_GAIN_MIN				0x10
#define OV02A10_GAIN_MAX				0xf8
#define OV02A10_GAIN_STEP				0x01
#define OV02A10_GAIN_DEFAULT				0x40

/* Test pattern control */
#define OV02A10_REG_TEST_PATTERN			0xb6

#define OV02A10_LINK_FREQ_390MHZ			(390 * HZ_PER_MHZ)
#define OV02A10_ECLK_FREQ				(24 * HZ_PER_MHZ)

/* Number of lanes supported by this driver */
#define OV02A10_DATA_LANES				1

/* Bits per sample of sensor output */
#define OV02A10_BITS_PER_SAMPLE				10

static const char * const ov02a10_supply_names[] = {
	"dovdd",	/* Digital I/O power */
	"avdd",		/* Analog power */
	"dvdd",		/* Digital core power */
};

struct ov02a10_reg {
	u8 addr;
	u8 val;
};

struct ov02a10_reg_list {
	u32 num_of_regs;
	const struct ov02a10_reg *regs;
};

struct ov02a10_mode {
	u32 width;
	u32 height;
	u32 exp_def;
	u32 hts_def;
	u32 vts_def;
	const struct ov02a10_reg_list reg_list;
};

struct ov02a10 {
	u32 eclk_freq;
	/* Indication of MIPI transmission speed select */
	u32 mipi_clock_voltage;

	struct clk *eclk;
	struct gpio_desc *pd_gpio;
	struct gpio_desc *rst_gpio;
	struct regulator_bulk_data supplies[ARRAY_SIZE(ov02a10_supply_names)];

	bool streaming;
	bool upside_down;

	/*
	 * Serialize control access, get/set format, get selection
	 * and start streaming.
	 */
	struct mutex mutex;
	struct v4l2_subdev subdev;
	struct media_pad pad;
	struct v4l2_mbus_framefmt fmt;
	struct v4l2_ctrl_handler ctrl_handler;
	struct v4l2_ctrl *exposure;

	const struct ov02a10_mode *cur_mode;
};

static inline struct ov02a10 *to_ov02a10(struct v4l2_subdev *sd)
{
	return container_of(sd, struct ov02a10, subdev);
}

/*
 * eclk 24Mhz
 * pclk 39Mhz
 * linelength 934(0x3a6)
 * framelength 1390(0x56E)
 * grabwindow_width 1600
 * grabwindow_height 1200
 * max_framerate 30fps
 * mipi_datarate per lane 780Mbps
 */
static const struct ov02a10_reg ov02a10_1600x1200_regs[] = {
	{0xfd, 0x01},
	{0xac, 0x00},
	{0xfd, 0x00},
	{0x2f, 0x29},
	{0x34, 0x00},
	{0x35, 0x21},
	{0x30, 0x15},
	{0x33, 0x01},
	{0xfd, 0x01},
	{0x44, 0x00},
	{0x2a, 0x4c},
	{0x2b, 0x1e},
	{0x2c, 0x60},
	{0x25, 0x11},
	{0x03, 0x01},
	{0x04, 0xae},
	{0x09, 0x00},
	{0x0a, 0x02},
	{0x06, 0xa6},
	{0x31, 0x00},
	{0x24, 0x40},
	{0x01, 0x01},
	{0xfb, 0x73},
	{0xfd, 0x01},
	{0x16, 0x04},
	{0x1c, 0x09},
	{0x21, 0x42},
	{0x12, 0x04},
	{0x13, 0x10},
	{0x11, 0x40},
	{0x33, 0x81},
	{0xd0, 0x00},
	{0xd1, 0x01},
	{0xd2, 0x00},
	{0x50, 0x10},
	{0x51, 0x23},
	{0x52, 0x20},
	{0x53, 0x10},
	{0x54, 0x02},
	{0x55, 0x20},
	{0x56, 0x02},
	{0x58, 0x48},
	{0x5d, 0x15},
	{0x5e, 0x05},
	{0x66, 0x66},
	{0x68, 0x68},
	{0x6b, 0x00},
	{0x6c, 0x00},
	{0x6f, 0x40},
	{0x70, 0x40},
	{0x71, 0x0a},
	{0x72, 0xf0},
	{0x73, 0x10},
	{0x75, 0x80},
	{0x76, 0x10},
	{0x84, 0x00},
	{0x85, 0x10},
	{0x86, 0x10},
	{0x87, 0x00},
	{0x8a, 0x22},
	{0x8b, 0x22},
	{0x19, 0xf1},
	{0x29, 0x01},
	{0xfd, 0x01},
	{0x9d, 0x16},
	{0xa0, 0x29},
	{0xa1, 0x04},
	{0xad, 0x62},
	{0xae, 0x00},
	{0xaf, 0x85},
	{0xb1, 0x01},
	{0x8e, 0x06},
	{0x8f, 0x40},
	{0x90, 0x04},
	{0x91, 0xb0},
	{0x45, 0x01},
	{0x46, 0x00},
	{0x47, 0x6c},
	{0x48, 0x03},
	{0x49, 0x8b},
	{0x4a, 0x00},
	{0x4b, 0x07},
	{0x4c, 0x04},
	{0x4d, 0xb7},
	{0xf0, 0x40},
	{0xf1, 0x40},
	{0xf2, 0x40},
	{0xf3, 0x40},
	{0x3f, 0x00},
	{0xfd, 0x01},
	{0x05, 0x00},
	{0x06, 0xa6},
	{0xfd, 0x01},
};

static const char * const ov02a10_test_pattern_menu[] = {
	"Disabled",
	"Eight Ve