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