linux/drivers/usb/gadget/u_audio.h
Cliff Cai feef1d952e USB: audio gadget: free alsa devices when unloading
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-23 11:34:20 -08:00

56 lines
1.1 KiB
C

/*
* u_audio.h -- interface to USB gadget "ALSA AUDIO" utilities
*
* Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
* 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 */