path: root/drivers/media/i2c/ov2680.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Omnivision OV2680 CMOS Image Sensor driver
 *
 * Copyright (C) 2018 Linaro Ltd
 *
 * Based on OV5640 Sensor Driver
 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright (C) 2014-2017 Mentor Graphics Inc.
 *
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>

#include <media/v4l2-cci.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>

#define OV2680_CHIP_ID				0x2680

#define OV2680_REG_STREAM_CTRL			CCI_REG8(0x0100)
#define OV2680_REG_SOFT_RESET			CCI_REG8(0x0103)

#define OV2680_REG_CHIP_ID			CCI_REG16(0x300a)
#define OV2680_REG_SC_CMMN_SUB_ID		CCI_REG8(0x302a)
#define OV2680_REG_PLL_MULTIPLIER		CCI_REG16(0x3081)

#define OV2680_REG_EXPOSURE_PK			CCI_REG24(0x3500)
#define OV2680_REG_R_MANUAL			CCI_REG8(0x3503)
#define OV2680_REG_GAIN_PK			CCI_REG16(0x350a)

#define OV2680_REG_SENSOR_CTRL_0A		CCI_REG8(0x370a)

#define OV2680_REG_HORIZONTAL_START		CCI_REG16(0x3800)
#define OV2680_REG_VERTICAL_START		CCI_REG16(0x3802)
#define OV2680_REG_HORIZONTAL_END		CCI_REG16(0x3804)
#define OV2680_REG_VERTICAL_END			CCI_REG16(0x3806)
#define OV2680_REG_HORIZONTAL_OUTPUT_SIZE	CCI_REG16(0x3808)
#define OV2680_REG_VERTICAL_OUTPUT_SIZE		CCI_REG16(0x380a)
#define OV2680_REG_TIMING_HTS			CCI_REG16(0x380c)
#define OV2680_REG_TIMING_VTS			CCI_REG16(0x380e)
#define OV2680_REG_ISP_X_WIN			CCI_REG16(0x3810)
#define OV2680_REG_ISP_Y_WIN			CCI_REG16(0x3812)
#define OV2680_REG_X_INC			CCI_REG8(0x3814)
#define OV2680_REG_Y_INC			CCI_REG8(0x3815)
#define OV2680_REG_FORMAT1			CCI_REG8(0x3820)
#define OV2680_REG_FORMAT2			CCI_REG8(0x3821)

#define OV2680_REG_ISP_CTRL00			CCI_REG8(0x5080)

#define OV2680_REG_X_WIN			CCI_REG16(0x5704)
#define OV2680_REG_Y_WIN			CCI_REG16(0x5706)

#define OV2680_FRAME_RATE			30

#define OV2680_NATIVE_WIDTH			1616
#define OV2680_NATIVE_HEIGHT			1216
#define OV2680_NATIVE_START_LEFT		0
#define OV2680_NATIVE_START_TOP			0
#define OV2680_ACTIVE_WIDTH			1600
#define OV2680_ACTIVE_HEIGHT			1200
#define OV2680_ACTIVE_START_LEFT		8
#define OV2680_ACTIVE_START_TOP			8
#define OV2680_MIN_CROP_WIDTH			2
#define OV2680_MIN_CROP_HEIGHT			2

/* Fixed pre-div of 1/2 */
#define OV2680_PLL_PREDIV0			2

/* Pre-div configurable through reg 0x3080, left at its default of 0x02 : 1/2 */
#define OV2680_PLL_PREDIV			2

/* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */
#define OV2680_PIXELS_PER_LINE			1704
#define OV2680_LINES_PER_FRAME			1294

/* If possible send 16 extra rows / lines to the ISP as padding */
#define OV2680_END_MARGIN			16

/* Max exposure time is VTS - 8 */
#define OV2680_INTEGRATION_TIME_MARGIN		8

#define OV2680_DEFAULT_WIDTH			800
#define OV2680_DEFAULT_HEIGHT			600

/* For enum_frame_size() full-size + binned-/quarter-size */
#define OV2680_FRAME_SIZES			2

static const char * const ov2680_supply_name[] = {
	"DOVDD",
	"DVDD",
	"AVDD",
};

#define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name)

enum {
	OV2680_19_2_MHZ,
	OV2680_24_MHZ,
};

static const unsigned long ov2680_xvclk_freqs[] = {
	[OV2680_19_2_MHZ] = 19200000,
	[OV2680_24_MHZ] = 24000000,
};

static const u8 ov2680_pll_multipliers[] = {
	[OV2680_19_2_MHZ] = 69,
	[OV2680_24_MHZ] = 55,
};

struct ov2680_ctrls {
	struct v4l2_ctrl_handler handler;
	struct v4l2_ctrl *exposure;
	struct v4l2_ctrl *gain;
	struct v4l2_ctrl *hflip;
	struct v4l2_ctrl *vflip;
	struct v4l2_ctrl *test_pattern;
	struct v4l2_ctrl *link_freq;
	struct v4l2_ctrl *pixel_rate;
};

struct ov2680_mode {
	struct v4l2_rect		crop;
	struct v4l2_mbus_framefmt	fmt;
	struct v4l2_fract		frame_interval;
	bool				binning;
	u16				h_start;
	u16				v_start;
	u16				h_end;
	u16				v_end;
	u16				h_output_size;
	u16				v_output_size;
	u16				hts;
	u16				vts;
};

struct ov2680_dev {
	struct device			*dev;
	struct regmap			*regmap;
	struct v4l2_subdev		sd;

	struct media_pad		pad;
	struct clk			*xvclk;
	u32				xvclk_freq;
	u8				pll_mult;
	s64				link_freq[1];
	u64				pixel_rate;
	struct regulator_bulk_data	supplies[OV2680_NUM_SUPPLIES];