/*
 * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
 *
 * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
 * Copyright (C) 2008 Analog Devices, Inc
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef __U_AUDIO_H
#define __U_AUDIO_H

#include <linux/device.h>
#include <linux/err.h>
#include <linux/usb/audio.h>
#include <linux/usb/composite.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#define FILE_PCM_PLAYBACK	"/dev/snd/pcmC0D0p"
#define FILE_PCM_CAPTURE	"/dev/snd/pcmC0D0c"
#define FILE_CONTROL		"/dev/snd/controlC0"

#define UAC1_OUT_EP_MAX_PACKET_SIZE	200
#define UAC1_REQ_COUNT			256
#define UAC1_AUDIO_BUF_SIZE		48000

/*
 * This represents the USB side of an audio card device, managed by a USB
 * function which provides control and stream interfaces.
 */

struct gaudio_snd_dev {
	struct gaudio			*card;
	struct file			*filp;
	struct snd_pcm_substream	*substream;
	int				access;
	int				format;
	int				channels;
	int				rate;
};

struct gaudio {
	struct usb_function		func;
	struct usb_gadget		*gadget;

	/* ALSA sound device interfaces */
	struct gaudio_snd_dev		control;
	struct gaudio_snd_dev		playback;
	struct gaudio_snd_dev		capture;

	/* TODO */
};

struct f_uac1_opts {
	struct usb_function_instance	func_inst;
	int				req_buf_size;
	int				req_count;
	int				audio_buf_size;
	char				*fn_play;
	char				*fn_cap;
	char				*fn_cntl;
	unsigned			bound:1;
	unsigned			fn_play_alloc:1;
	unsigned			fn_cap_alloc:1;
	unsigned			fn_cntl_alloc:1;
	struct mutex			lock;
	int				refcnt;
};

int gaudio_setup(struct gaudio *card);
void gaudio_cleanup(struct gaudio *the_card);

size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
int u_audio_get_playback_channels(struct gaudio *card);
int u_audio_get_playback_rate(struct gaudio *card);

#endif /* __U_AUDIO_H */
palm27x.c?id=51964e9e12d0a054002a1a0d1dec4f661c7aaf28'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/pxa/palm27x.c?id=51964e9e12d0a054002a1a0d1dec4f661c7aaf28'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/palm27x.c'>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/memory-hotplug/config?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing/selftests/memory-hotplug/config?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/'>f63906f41699c8e38af9d12b063e2ceab0286ef2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing/selftests/memory-hotplug/config'>tools/testing/selftests/memory-hotplug/config</a></td></tr>
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<div class='commit-subject'>Merge tag 'docs-4.10' of git://git.lwn.net/linux<span class='decoration'><a class='deco' href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/memory-hotplug/config?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>HEAD</a><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/tools/testing/selftests/memory-hotplug/config'>master</a></span></div><div class='commit-msg'>Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -&gt; awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" =&gt; "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/'>Diffstat</a> (limited to 'tools/testing/selftests/memory-hotplug/config')</div><table summary='diffstat' class='diffstat'>