u_uac1.h

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/*
 * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
 *
 * Copyright (C) 2008 Bryan Wu <[email protected]>
 * Copyright (C) 2008 Analog Devices, Inc
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef __U_AUDIO_H
#define __U_AUDIO_H

#include <linux/device.h>
#include <linux/err.h>
#include <linux/usb/audio.h>
#include <linux/usb/composite.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "gadget_chips.h"

/*
 * This represents the USB side of an audio card device, managed by a USB
 * function which provides control and stream interfaces.
 */

struct gaudio_snd_dev {
    struct gaudio           *card;
    struct file         *filp;
    struct snd_pcm_substream    *substream;
    int             access;
    int             format;
    int             channels;
    int             rate;
};

struct gaudio {
    struct usb_function     func;
    struct usb_gadget       *gadget;

    /* ALSA sound device interfaces */
    struct gaudio_snd_dev       control;
    struct gaudio_snd_dev       playback;
    struct gaudio_snd_dev       capture;

    /* TODO */
};

int gaudio_setup(struct gaudio *card);
void gaudio_cleanup(void);

#endif /* __U_AUDIO_H */