linux-imx

/*

 * vp27smpx - driver version 0.0.1

 *

 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>

 *

 * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com>

 * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp>

 *

 * 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>

​

MODULE_DESCRIPTION("vp27smpx driver");

MODULE_AUTHOR("Hans Verkuil");

MODULE_LICENSE("GPL");

​

​

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

​

struct vp27smpx_state {

    struct v4l2_subdev sd;

    int radio;

    u32 audmode;

};

​

static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd)

{

    return container_of(sd, struct vp27smpx_state, sd);

}

​

static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode)

{

    struct vp27smpx_state *state = to_state(sd);

    struct i2c_client *client = v4l2_get_subdevdata(sd);

    u8 data[3] = { 0x00, 0x00, 0x04 };

​

    switch (audmode) {

    case V4L2_TUNER_MODE_MONO:

    case V4L2_TUNER_MODE_LANG1:

        break;

    case V4L2_TUNER_MODE_STEREO:

    case V4L2_TUNER_MODE_LANG1_LANG2:

        data[1] = 0x01;

        break;

    case V4L2_TUNER_MODE_LANG2:

        data[1] = 0x02;

        break;