1 /* 2 * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities 3 * 4 * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> 5 * Copyright (C) 2008 Analog Devices, Inc 6 * 7 * Enter bugs at http://blackfin.uclinux.org/ 8 * 9 * Licensed under the GPL-2 or later. 10 */ 11 12 #ifndef __U_AUDIO_H 13 #define __U_AUDIO_H 14 15 #include <linux/device.h> 16 #include <linux/err.h> 17 #include <linux/usb/audio.h> 18 #include <linux/usb/composite.h> 19 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/pcm_params.h> 23 24 #include "gadget_chips.h" 25 26 /* 27 * This represents the USB side of an audio card device, managed by a USB 28 * function which provides control and stream interfaces. 29 */ 30 31 struct gaudio_snd_dev { 32 struct gaudio *card; 33 struct file *filp; 34 struct snd_pcm_substream *substream; 35 int access; 36 int format; 37 int channels; 38 int rate; 39 }; 40 41 struct gaudio { 42 struct usb_function func; 43 struct usb_gadget *gadget; 44 45 /* ALSA sound device interfaces */ 46 struct gaudio_snd_dev control; 47 struct gaudio_snd_dev playback; 48 struct gaudio_snd_dev capture; 49 50 /* TODO */ 51 }; 52 53 int gaudio_setup(struct gaudio *card); 54 void gaudio_cleanup(void); 55 56 #endif /* __U_AUDIO_H */ 57