linux-imx

/*

 * adv7183.c Analog Devices ADV7183 video decoder driver

 *

 * Copyright (c) 2011 Analog Devices Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <linux/videodev2.h>

​

#include <media/i2c/adv7183.h>

#include <media/v4l2-ctrls.h>

#include <media/v4l2-device.h>

​

#include "adv7183_regs.h"

​

struct adv7183 {

    struct v4l2_subdev sd;

    struct v4l2_ctrl_handler hdl;

​

    v4l2_std_id std; /* Current set standard */

    u32 input;

    u32 output;

    unsigned reset_pin;

    unsigned oe_pin;

    struct v4l2_mbus_framefmt fmt;

};

​

/* EXAMPLES USING 27 MHz CLOCK

 * Mode 1 CVBS Input (Composite Video on AIN5)

 * All standards are supported through autodetect, 8-bit, 4:2:2, ITU-R BT.656 output on P15 to P8.

 */

static const unsigned char adv7183_init_regs[] = {

    ADV7183_IN_CTRL, 0x04,           /* CVBS input on AIN5 */

    ADV7183_DIGI_CLAMP_CTRL_1, 0x00, /* Slow down digital clamps */

    ADV7183_SHAP_FILT_CTRL, 0x41,    /* Set CSFM to SH1 */

    ADV7183_ADC_CTRL, 0x16,          /* Power down ADC 1 and ADC 2 */

    ADV7183_CTI_DNR_CTRL_4, 0x04,    /* Set DNR threshold to 4 for flat response */

    /* ADI recommended programming sequence */

    ADV7183_ADI_CTRL, 0x80,

    ADV7183_CTI_DNR_CTRL_4, 0x20,

    0x52, 0x18,

    0x58, 0xED,

    0x77, 0xC5,

    0x7C, 0x93,

    0x7D, 0x00,

    0xD0, 0x48,

    0xD5, 0xA0,

    0xD7, 0xEA,

    ADV7183_SD_SATURATION_CR, 0x3E,

    ADV7183_PAL_V_END, 0x3E,

    ADV7183_PAL_F_TOGGLE, 0x0F,

    ADV7183_ADI_CTRL, 0x00,

};

​

static inline struct adv7183 *to_adv7183(struct v4l2_subdev *sd)

{

    return container_of(sd, struct adv7183, sd);

}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)

{

    return &container_of(ctrl->handler, struct adv7183, hdl)->sd;

}

​

static inline int adv7183_read(struct v4l2_subdev *sd, unsigned char reg)

{

    struct i2c_client *client = v4l2_get_subdevdata(sd);

​

    return i2c_smbus_read_byte_data(client, reg);

}

​

static inline int adv7183_write(struct v4l2_subdev *sd, unsigned char reg,

                unsigned char value)

{

    struct i2c_client *client = v4l2_get_subdevdata(sd);

​

    return i2c_smbus_write_byte_data(client, reg, value);