57 строки
1.1 KiB
C
57 строки
1.1 KiB
C
/*
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* u_audio.h -- interface to USB gadget "ALSA AUDIO" utilities
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*
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* Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
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* Copyright (C) 2008 Analog Devices, Inc
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*
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* Enter bugs at http://blackfin.uclinux.org/
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __U_AUDIO_H
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#define __U_AUDIO_H
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/usb/audio.h>
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#include <linux/usb/composite.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "gadget_chips.h"
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/*
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* This represents the USB side of an audio card device, managed by a USB
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* function which provides control and stream interfaces.
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*/
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struct gaudio_snd_dev {
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struct gaudio *card;
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struct file *filp;
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struct snd_pcm_substream *substream;
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int access;
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int format;
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int channels;
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int rate;
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};
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struct gaudio {
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struct usb_function func;
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struct usb_gadget *gadget;
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/* ALSA sound device interfaces */
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struct gaudio_snd_dev control;
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struct gaudio_snd_dev playback;
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struct gaudio_snd_dev capture;
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/* TODO */
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};
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int gaudio_setup(struct gaudio *card);
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void gaudio_cleanup(void);
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#endif /* __U_AUDIO_H */
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