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 */
17 struct 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 */
37 struct 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 */
72 struct 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 */
84
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