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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __SOUND_SEQ_OSS_H
3#define __SOUND_SEQ_OSS_H
4
5/*
6 * OSS compatible sequencer driver
7 *
8 * Copyright (C) 1998,99 Takashi Iwai
9 */
10
11#include <sound/asequencer.h>
12#include <sound/seq_kernel.h>
13
14/*
15 * argument structure for synthesizer operations
16 */
17struct snd_seq_oss_arg {
18 /* given by OSS sequencer */
19 int app_index; /* application unique index */
20 int file_mode; /* file mode - see below */
21 int seq_mode; /* sequencer mode - see below */
22
23 /* following must be initialized in open callback */
24 struct snd_seq_addr addr; /* opened port address */
25 void *private_data; /* private data for lowlevel drivers */
26
27 /* note-on event passing mode: initially given by OSS seq,
28 * but configurable by drivers - see below
29 */
30 int event_passing;
31};
32
33
34/*
35 * synthesizer operation callbacks
36 */
37struct snd_seq_oss_callback {
38 struct module *owner;
39 int (*open)(struct snd_seq_oss_arg *p, void *closure);
40 int (*close)(struct snd_seq_oss_arg *p);
41 int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
42 int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
43 int (*reset)(struct snd_seq_oss_arg *p);
44 int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
45};
46
47/* flag: file_mode */
48#define SNDRV_SEQ_OSS_FILE_ACMODE 3
49#define SNDRV_SEQ_OSS_FILE_READ 1
50#define SNDRV_SEQ_OSS_FILE_WRITE 2
51#define SNDRV_SEQ_OSS_FILE_NONBLOCK 4
52
53/* flag: seq_mode */
54#define SNDRV_SEQ_OSS_MODE_SYNTH 0
55#define SNDRV_SEQ_OSS_MODE_MUSIC 1
56
57/* flag: event_passing */
58#define SNDRV_SEQ_OSS_PROCESS_EVENTS 0 /* key == 255 is processed as velocity change */
59#define SNDRV_SEQ_OSS_PASS_EVENTS 1 /* pass all events to callback */
60#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS 2 /* key >= 128 will be processed as key-pressure */
61
62/* default control rate: fixed */
63#define SNDRV_SEQ_OSS_CTRLRATE 100
64
65/* default max queue length: configurable by module option */
66#define SNDRV_SEQ_OSS_MAX_QLEN 1024
67
68
69/*
70 * data pointer to snd_seq_register_device
71 */
72struct snd_seq_oss_reg {
73 int type;
74 int subtype;
75 int nvoices;
76 struct snd_seq_oss_callback oper;
77 void *private_data;
78};
79
80/* device id */
81#define SNDRV_SEQ_DEV_ID_OSS "seq-oss"
82
83#endif /* __SOUND_SEQ_OSS_H */