linux-imx

/*

 * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.

 * Copyright (C) 2005  Martin Vaughan

 *

 * Audio source switching for Adaptec AVC-2410 added by Trev Jackson

 *

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

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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/module.h>

#include <linux/types.h>

#include <linux/slab.h>

#include <linux/ioctl.h>

#include <linux/uaccess.h>

#include <linux/i2c.h>

#include <linux/videodev2.h>

#include <media/v4l2-device.h>

#include <media/v4l2-ctrls.h>

​

MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");

MODULE_AUTHOR("Martin Vaughan");

MODULE_LICENSE("GPL");

​

static bool debug;

​

module_param(debug, bool, 0644);

​

MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");

​

​

struct cs53l32a_state {

    struct v4l2_subdev sd;

    struct v4l2_ctrl_handler hdl;

};

​

static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd)

{

    return container_of(sd, struct cs53l32a_state, sd);

}

​

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

{

    return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd;

}

​

/* ----------------------------------------------------------------------- */

​

static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)

{

    struct i2c_client *client = v4l2_get_subdevdata(sd);

​

    return i2c_smbus_write_byte_data(client, reg, value);

}

​