linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for the OV7251 camera sensor.

 *

 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2017-2018, Linaro Ltd.

 */

​

#include <linux/bitops.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/gpio/consumer.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <media/v4l2-ctrls.h>

#include <media/v4l2-fwnode.h>

#include <media/v4l2-subdev.h>

​

#define OV7251_SC_MODE_SELECT       0x0100

#define OV7251_SC_MODE_SELECT_SW_STANDBY    0x0

#define OV7251_SC_MODE_SELECT_STREAMING     0x1

​

#define OV7251_CHIP_ID_HIGH     0x300a

#define OV7251_CHIP_ID_HIGH_BYTE    0x77

#define OV7251_CHIP_ID_LOW      0x300b

#define OV7251_CHIP_ID_LOW_BYTE     0x50

#define OV7251_SC_GP_IO_IN1     0x3029

#define OV7251_AEC_EXPO_0       0x3500

#define OV7251_AEC_EXPO_1       0x3501

#define OV7251_AEC_EXPO_2       0x3502

#define OV7251_AEC_AGC_ADJ_0        0x350a

#define OV7251_AEC_AGC_ADJ_1        0x350b

#define OV7251_TIMING_FORMAT1       0x3820

#define OV7251_TIMING_FORMAT1_VFLIP BIT(2)

#define OV7251_TIMING_FORMAT2       0x3821

#define OV7251_TIMING_FORMAT2_MIRROR    BIT(2)

#define OV7251_PRE_ISP_00       0x5e00

#define OV7251_PRE_ISP_00_TEST_PATTERN  BIT(7)

​

struct reg_value {

    u16 reg;

    u8 val;

};

​

struct ov7251_mode_info {

    u32 width;

    u32 height;

    const struct reg_value *data;

    u32 data_size;

    u32 pixel_clock;

    u32 link_freq;

    u16 exposure_max;

    u16 exposure_def;

    struct v4l2_fract timeperframe;

};

​

struct ov7251 {

    struct i2c_client *i2c_client;

    struct device *dev;

    struct v4l2_subdev sd;

    struct media_pad pad;

    struct v4l2_fwnode_endpoint ep;

    struct v4l2_mbus_framefmt fmt;

    struct v4l2_rect crop;

    struct clk *xclk;

    u32 xclk_freq;

​

    struct regulator *io_regulator;

    struct regulator *core_regulator;

    struct regulator *analog_regulator;

​

    const struct ov7251_mode_info *current_mode;

​

    struct v4l2_ctrl_handler ctrls;

    struct v4l2_ctrl *pixel_clock;

    struct v4l2_ctrl *link_freq;

    struct v4l2_ctrl *exposure;

    struct v4l2_ctrl *gain;

​

    /* Cached register values */

    u8 aec_pk_manual;

    u8 pre_isp_00;

    u8 timing_format1;

    u8 timing_format2;

​

    struct mutex lock; /* lock to protect power state, ctrls and mode */

    bool power_on;