118 lines
2.9 KiB
C
Vendored
118 lines
2.9 KiB
C
Vendored
/*
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* u_uac1.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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#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
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#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
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#define FILE_CONTROL "/dev/snd/controlC0"
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#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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#define UAC1_CAPTURE_SAMPLE_RATE 16000
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#define UAC1_CAPTURE_CHANNEL_COUNT 1
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#define UAC1_IN_EP_MAX_PACKET_SIZE 32
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#define UAC1_IN_REQ_COUNT 32
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#define UAC1_AUDIO_CAPTURE_BUF_SIZE 1024
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#define UAC1_PLAYBACK_SAMPLE_RATE 16000
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#define UAC1_PLAYBACK_CHANNEL_COUNT 1
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#endif
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#define UAC1_OUT_EP_MAX_PACKET_SIZE 512
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#define UAC1_OUT_REQ_COUNT 8
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#define UAC1_AUDIO_PLAYBACK_BUF_SIZE 2048
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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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int period_bytes;
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int buffer_bytes;
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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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#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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typedef enum audio_mode {
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DISABLE_UAC,
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ENABLE_SPEAKER,
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ENABLE_MICROPHONE,
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ENABLE_MIC_AND_SPK,
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UNKNOWN_COMMAND,
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} audio_mode_e;
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#endif
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struct f_uac1_opts {
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struct usb_function_instance func_inst;
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int out_req_buf_size;
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int out_req_count;
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int audio_playback_buf_size;
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#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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int playback_channel_count;
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int playback_sample_rate;
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int capture_channel_count;
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int capture_sample_rate;
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int in_req_buf_size;
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int in_req_count;
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int audio_capture_buf_size;
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audio_mode_e audio_play_mode;
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#endif
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char *fn_play;
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char *fn_cap;
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char *fn_cntl;
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unsigned bound:1;
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unsigned fn_play_alloc:1;
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unsigned fn_cap_alloc:1;
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unsigned fn_cntl_alloc:1;
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struct mutex lock;
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int refcnt;
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};
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int gaudio_setup(struct gaudio *card);
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void gaudio_cleanup(struct gaudio *the_card);
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size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
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size_t u_audio_capture(struct gaudio *card, void *buf, size_t count);
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int u_audio_get_playback_channels(struct gaudio *card);
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int u_audio_get_playback_rate(struct gaudio *card);
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int u_audio_get_capture_channels(struct gaudio *card);
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int u_audio_get_capture_rate(struct gaudio *card);
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#endif /* __U_AUDIO_H */
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