| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 1 | /* |
| Jassi Brar | 18b5b3b | 2012-02-02 21:59:53 +0530 | [diff] [blame] | 2 | * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities |
| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 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 | |
| Andrzej Pietrasiewicz | bcec978 | 2014-07-22 19:58:42 +0200 | [diff] [blame] | 26 | #define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p" |
| 27 | #define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c" |
| 28 | #define FILE_CONTROL "/dev/snd/controlC0" |
| 29 | |
| 30 | #define UAC1_OUT_EP_MAX_PACKET_SIZE 200 |
| 31 | #define UAC1_REQ_COUNT 256 |
| 32 | #define UAC1_AUDIO_BUF_SIZE 48000 |
| 33 | |
| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 34 | /* |
| 35 | * This represents the USB side of an audio card device, managed by a USB |
| 36 | * function which provides control and stream interfaces. |
| 37 | */ |
| 38 | |
| 39 | struct gaudio_snd_dev { |
| 40 | struct gaudio *card; |
| 41 | struct file *filp; |
| 42 | struct snd_pcm_substream *substream; |
| 43 | int access; |
| 44 | int format; |
| 45 | int channels; |
| 46 | int rate; |
| 47 | }; |
| 48 | |
| 49 | struct gaudio { |
| 50 | struct usb_function func; |
| 51 | struct usb_gadget *gadget; |
| 52 | |
| 53 | /* ALSA sound device interfaces */ |
| 54 | struct gaudio_snd_dev control; |
| 55 | struct gaudio_snd_dev playback; |
| 56 | struct gaudio_snd_dev capture; |
| 57 | |
| 58 | /* TODO */ |
| 59 | }; |
| 60 | |
| Andrzej Pietrasiewicz | f3a3406 | 2014-07-22 19:58:38 +0200 | [diff] [blame] | 61 | struct f_uac1_opts { |
| 62 | struct usb_function_instance func_inst; |
| 63 | int req_buf_size; |
| 64 | int req_count; |
| 65 | int audio_buf_size; |
| 66 | char *fn_play; |
| 67 | char *fn_cap; |
| 68 | char *fn_cntl; |
| Andrzej Pietrasiewicz | 0854611 | 2014-07-22 19:58:43 +0200 | [diff] [blame^] | 69 | unsigned bound:1; |
| 70 | unsigned fn_play_alloc:1; |
| 71 | unsigned fn_cap_alloc:1; |
| 72 | unsigned fn_cntl_alloc:1; |
| Andrzej Pietrasiewicz | f3a3406 | 2014-07-22 19:58:38 +0200 | [diff] [blame] | 73 | struct gaudio *card; |
| Andrzej Pietrasiewicz | 0854611 | 2014-07-22 19:58:43 +0200 | [diff] [blame^] | 74 | struct mutex lock; |
| 75 | int refcnt; |
| Andrzej Pietrasiewicz | f3a3406 | 2014-07-22 19:58:38 +0200 | [diff] [blame] | 76 | }; |
| 77 | |
| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 78 | int gaudio_setup(struct gaudio *card); |
| Andrzej Pietrasiewicz | f3a3406 | 2014-07-22 19:58:38 +0200 | [diff] [blame] | 79 | void gaudio_cleanup(struct gaudio *the_card); |
| Andrzej Pietrasiewicz | f3a3406 | 2014-07-22 19:58:38 +0200 | [diff] [blame] | 80 | |
| 81 | size_t u_audio_playback(struct gaudio *card, void *buf, size_t count); |
| 82 | int u_audio_get_playback_channels(struct gaudio *card); |
| 83 | int u_audio_get_playback_rate(struct gaudio *card); |
| Bryan Wu | c6994e6 | 2009-06-03 09:17:58 -0400 | [diff] [blame] | 84 | |
| 85 | #endif /* __U_AUDIO_H */ |