cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

u_uac1_legacy.h (1870B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
      4 *
      5 * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
      6 * Copyright (C) 2008 Analog Devices, Inc
      7 */
      8
      9#ifndef __U_UAC1_LEGACY_H
     10#define __U_UAC1_LEGACY_H
     11
     12#include <linux/device.h>
     13#include <linux/err.h>
     14#include <linux/usb/audio.h>
     15#include <linux/usb/composite.h>
     16
     17#include <sound/core.h>
     18#include <sound/pcm.h>
     19#include <sound/pcm_params.h>
     20
     21#define FILE_PCM_PLAYBACK	"/dev/snd/pcmC0D0p"
     22#define FILE_PCM_CAPTURE	"/dev/snd/pcmC0D0c"
     23#define FILE_CONTROL		"/dev/snd/controlC0"
     24
     25#define UAC1_OUT_EP_MAX_PACKET_SIZE	200
     26#define UAC1_REQ_COUNT			256
     27#define UAC1_AUDIO_BUF_SIZE		48000
     28
     29/*
     30 * This represents the USB side of an audio card device, managed by a USB
     31 * function which provides control and stream interfaces.
     32 */
     33
     34struct gaudio_snd_dev {
     35	struct gaudio			*card;
     36	struct file			*filp;
     37	struct snd_pcm_substream	*substream;
     38	int				access;
     39	int				format;
     40	int				channels;
     41	int				rate;
     42};
     43
     44struct gaudio {
     45	struct usb_function		func;
     46	struct usb_gadget		*gadget;
     47
     48	/* ALSA sound device interfaces */
     49	struct gaudio_snd_dev		control;
     50	struct gaudio_snd_dev		playback;
     51	struct gaudio_snd_dev		capture;
     52
     53	/* TODO */
     54};
     55
     56struct f_uac1_legacy_opts {
     57	struct usb_function_instance	func_inst;
     58	int				req_buf_size;
     59	int				req_count;
     60	int				audio_buf_size;
     61	char				*fn_play;
     62	char				*fn_cap;
     63	char				*fn_cntl;
     64	unsigned			bound:1;
     65	unsigned			fn_play_alloc:1;
     66	unsigned			fn_cap_alloc:1;
     67	unsigned			fn_cntl_alloc:1;
     68	struct mutex			lock;
     69	int				refcnt;
     70};
     71
     72int gaudio_setup(struct gaudio *card);
     73void gaudio_cleanup(struct gaudio *the_card);
     74
     75size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
     76int u_audio_get_playback_channels(struct gaudio *card);
     77int u_audio_get_playback_rate(struct gaudio *card);
     78
     79#endif /* __U_UAC1_LEGACY_H */