1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __SOUND_PCM_OSS_H
3#define __SOUND_PCM_OSS_H
4
5/*
6 *  Digital Audio (PCM) - OSS compatibility abstract layer
7 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
8 */
9
10struct snd_pcm_oss_setup {
11	char *task_name;
12	unsigned int disable:1,
13		     direct:1,
14		     block:1,
15		     nonblock:1,
16		     partialfrag:1,
17		     nosilence:1,
18		     buggyptr:1;
19	unsigned int periods;
20	unsigned int period_size;
21	struct snd_pcm_oss_setup *next;
22};
23
24struct snd_pcm_oss_runtime {
25	unsigned params: 1,			/* format/parameter change */
26		 prepare: 1,			/* need to prepare the operation */
27		 trigger: 1,			/* trigger flag */
28		 sync_trigger: 1;		/* sync trigger flag */
29	int rate;				/* requested rate */
30	int format;				/* requested OSS format */
31	unsigned int channels;			/* requested channels */
32	unsigned int fragshift;
33	unsigned int maxfrags;
34	unsigned int subdivision;		/* requested subdivision */
35	size_t period_bytes;			/* requested period size */
36	size_t period_frames;			/* period frames for poll */
37	size_t period_ptr;			/* actual write pointer to period */
38	unsigned int periods;
39	size_t buffer_bytes;			/* requested buffer size */
40	size_t bytes;				/* total # bytes processed */
41	size_t mmap_bytes;
42	char *buffer;				/* vmallocated period */
43	size_t buffer_used;			/* used length from period buffer */
44	struct mutex params_lock;
45	atomic_t rw_ref;		/* concurrent read/write accesses */
46#ifdef CONFIG_SND_PCM_OSS_PLUGINS
47	struct snd_pcm_plugin *plugin_first;
48	struct snd_pcm_plugin *plugin_last;
49#endif
50	unsigned int prev_hw_ptr_period;
51};
52
53struct snd_pcm_oss_file {
54	struct snd_pcm_substream *streams[2];
55};
56
57struct snd_pcm_oss_substream {
58	unsigned oss: 1;			/* oss mode */
59	struct snd_pcm_oss_setup setup;		/* active setup */
60};
61
62struct snd_pcm_oss_stream {
63	struct snd_pcm_oss_setup *setup_list;	/* setup list */
64	struct mutex setup_mutex;
65#ifdef CONFIG_SND_VERBOSE_PROCFS
66	struct snd_info_entry *proc_entry;
67#endif
68};
69
70struct snd_pcm_oss {
71	int reg;
72	unsigned int reg_mask;
73};
74
75#endif /* __SOUND_PCM_OSS_H */
76