| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * u_audio.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(struct gaudio *card); |
| 55 | |
| 56 | #endif /* __U_AUDIO_H */ |