1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * u_uac1.h - Utility definitions for UAC1 function
 4 *
 5 * Copyright (C) 2016 Ruslan Bilovol <ruslan.bilovol@gmail.com>
 
 
 
 
 
 6 */
 7
 8#ifndef __U_UAC1_H
 9#define __U_UAC1_H
10
 
 
 
11#include <linux/usb/composite.h>
12#include "uac_common.h"
 
 
 
 
 
 
 
13
14#define UAC1_OUT_EP_MAX_PACKET_SIZE	200
15#define UAC1_DEF_CCHMASK	0x3
16#define UAC1_DEF_CSRATE		48000
17#define UAC1_DEF_CSSIZE		2
18#define UAC1_DEF_PCHMASK	0x3
19#define UAC1_DEF_PSRATE		48000
20#define UAC1_DEF_PSSIZE		2
21#define UAC1_DEF_REQ_NUM	2
22#define UAC1_DEF_INT_REQ_NUM	10
23
24#define UAC1_DEF_MUTE_PRESENT	1
25#define UAC1_DEF_VOLUME_PRESENT 1
26#define UAC1_DEF_MIN_DB		(-100*256)	/* -100 dB */
27#define UAC1_DEF_MAX_DB		0		/* 0 dB */
28#define UAC1_DEF_RES_DB		(1*256)	/* 1 dB */
29
 
 
 
 
30
31struct f_uac1_opts {
32	struct usb_function_instance	func_inst;
33	int				c_chmask;
34	int				c_srates[UAC_MAX_RATES];
35	int				c_ssize;
36	int				p_chmask;
37	int				p_srates[UAC_MAX_RATES];
38	int				p_ssize;
39
40	bool			p_mute_present;
41	bool			p_volume_present;
42	s16				p_volume_min;
43	s16				p_volume_max;
44	s16				p_volume_res;
45
46	bool			c_mute_present;
47	bool			c_volume_present;
48	s16				c_volume_min;
49	s16				c_volume_max;
50	s16				c_volume_res;
51
52	int				req_number;
53	unsigned			bound:1;
 
 
 
 
 
 
54
55	char			function_name[32];
 
56
 
 
 
 
 
 
 
 
 
 
 
 
57	struct mutex			lock;
58	int				refcnt;
59};
60
61#endif /* __U_UAC1_H */
 
 
 
 
 
 
 

 
 1/*
 2 * u_uac1.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#define FILE_PCM_PLAYBACK	"/dev/snd/pcmC0D0p"
25#define FILE_PCM_CAPTURE	"/dev/snd/pcmC0D0c"
26#define FILE_CONTROL		"/dev/snd/controlC0"
27
28#define UAC1_OUT_EP_MAX_PACKET_SIZE	200
29#define UAC1_REQ_COUNT			256
30#define UAC1_AUDIO_BUF_SIZE		48000
 
 
 
 
 
 
 
 
 
 
 
 
31
32/*
33 * This represents the USB side of an audio card device, managed by a USB
34 * function which provides control and stream interfaces.
35 */
36
37struct gaudio_snd_dev {
38	struct gaudio			*card;
39	struct file			*filp;
40	struct snd_pcm_substream	*substream;
41	int				access;
42	int				format;
43	int				channels;
44	int				rate;
45};
 
 
 
 
 
 
 
 
 
 
 
46
47struct gaudio {
48	struct usb_function		func;
49	struct usb_gadget		*gadget;
50
51	/* ALSA sound device interfaces */
52	struct gaudio_snd_dev		control;
53	struct gaudio_snd_dev		playback;
54	struct gaudio_snd_dev		capture;
55
56	/* TODO */
57};
58
59struct f_uac1_opts {
60	struct usb_function_instance	func_inst;
61	int				req_buf_size;
62	int				req_count;
63	int				audio_buf_size;
64	char				*fn_play;
65	char				*fn_cap;
66	char				*fn_cntl;
67	unsigned			bound:1;
68	unsigned			fn_play_alloc:1;
69	unsigned			fn_cap_alloc:1;
70	unsigned			fn_cntl_alloc:1;
71	struct mutex			lock;
72	int				refcnt;
73};
74
75int gaudio_setup(struct gaudio *card);
76void gaudio_cleanup(struct gaudio *the_card);
77
78size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
79int u_audio_get_playback_channels(struct gaudio *card);
80int u_audio_get_playback_rate(struct gaudio *card);
81
82#endif /* __U_AUDIO_H */