1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * OSS compatible sequencer driver
4 *
5 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
6 */
7
8#ifndef __SEQ_OSS_DEVICE_H
9#define __SEQ_OSS_DEVICE_H
10
11#include <linux/time.h>
12#include <linux/wait.h>
13#include <linux/slab.h>
14#include <linux/sched/signal.h>
15#include <sound/core.h>
16#include <sound/seq_oss.h>
17#include <sound/rawmidi.h>
18#include <sound/seq_kernel.h>
19#include <sound/info.h>
20#include "../seq_clientmgr.h"
21
22/* max. applications */
23#define SNDRV_SEQ_OSS_MAX_CLIENTS 16
24#define SNDRV_SEQ_OSS_MAX_SYNTH_DEVS 16
25#define SNDRV_SEQ_OSS_MAX_MIDI_DEVS 32
26
27/* version */
28#define SNDRV_SEQ_OSS_MAJOR_VERSION 0
29#define SNDRV_SEQ_OSS_MINOR_VERSION 1
30#define SNDRV_SEQ_OSS_TINY_VERSION 8
31#define SNDRV_SEQ_OSS_VERSION_STR "0.1.8"
32
33/* device and proc interface name */
34#define SNDRV_SEQ_OSS_PROCNAME "oss"
35
36
37/*
38 * type definitions
39 */
40
41typedef unsigned int reltime_t;
42typedef unsigned int abstime_t;
43
44
45/*
46 * synthesizer channel information
47 */
48struct seq_oss_chinfo {
49 int note, vel;
50};
51
52/*
53 * synthesizer information
54 */
55struct seq_oss_synthinfo {
56 struct snd_seq_oss_arg arg;
57 struct seq_oss_chinfo *ch;
58 struct seq_oss_synth_sysex *sysex;
59 int nr_voices;
60 int opened;
61 int is_midi;
62 int midi_mapped;
63};
64
65
66/*
67 * sequencer client information
68 */
69
70struct seq_oss_devinfo {
71
72 int index; /* application index */
73 int cseq; /* sequencer client number */
74 int port; /* sequencer port number */
75 int queue; /* sequencer queue number */
76
77 struct snd_seq_addr addr; /* address of this device */
78
79 int seq_mode; /* sequencer mode */
80 int file_mode; /* file access */
81
82 /* midi device table */
83 int max_mididev;
84
85 /* synth device table */
86 int max_synthdev;
87 struct seq_oss_synthinfo synths[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
88 int synth_opened;
89
90 /* output queue */
91 struct seq_oss_writeq *writeq;
92
93 /* midi input queue */
94 struct seq_oss_readq *readq;
95
96 /* timer */
97 struct seq_oss_timer *timer;
98};
99
100
101/*
102 * function prototypes
103 */
104
105/* create/delete OSS sequencer client */
106int snd_seq_oss_create_client(void);
107int snd_seq_oss_delete_client(void);
108
109/* device file interface */
110int snd_seq_oss_open(struct file *file, int level);
111void snd_seq_oss_release(struct seq_oss_devinfo *dp);
112int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long arg);
113int snd_seq_oss_read(struct seq_oss_devinfo *dev, char __user *buf, int count);
114int snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt);
115__poll_t snd_seq_oss_poll(struct seq_oss_devinfo *dp, struct file *file, poll_table * wait);
116
117void snd_seq_oss_reset(struct seq_oss_devinfo *dp);
118
119/* */
120void snd_seq_oss_process_queue(struct seq_oss_devinfo *dp, abstime_t time);
121
122
123/* proc interface */
124void snd_seq_oss_system_info_read(struct snd_info_buffer *buf);
125void snd_seq_oss_midi_info_read(struct snd_info_buffer *buf);
126void snd_seq_oss_synth_info_read(struct snd_info_buffer *buf);
127void snd_seq_oss_readq_info_read(struct seq_oss_readq *q, struct snd_info_buffer *buf);
128
129/* file mode macros */
130#define is_read_mode(mode) ((mode) & SNDRV_SEQ_OSS_FILE_READ)
131#define is_write_mode(mode) ((mode) & SNDRV_SEQ_OSS_FILE_WRITE)
132#define is_nonblock_mode(mode) ((mode) & SNDRV_SEQ_OSS_FILE_NONBLOCK)
133
134/* dispatch event */
135static inline int
136snd_seq_oss_dispatch(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int atomic, int hop)
137{
138 return snd_seq_kernel_client_dispatch(client: dp->cseq, ev, atomic, hop);
139}
140
141/* ioctl for writeq */
142static inline int
143snd_seq_oss_control(struct seq_oss_devinfo *dp, unsigned int type, void *arg)
144{
145 int err;
146
147 snd_seq_client_ioctl_lock(clientid: dp->cseq);
148 err = snd_seq_kernel_client_ctl(client: dp->cseq, cmd: type, arg);
149 snd_seq_client_ioctl_unlock(clientid: dp->cseq);
150 return err;
151}
152
153/* fill the addresses in header */
154static inline void
155snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
156 int dest_client, int dest_port)
157{
158 ev->queue = dp->queue;
159 ev->source = dp->addr;
160 ev->dest.client = dest_client;
161 ev->dest.port = dest_port;
162}
163
164
165/* misc. functions for proc interface */
166char *enabled_str(bool b);
167
168#endif /* __SEQ_OSS_DEVICE_H */
169

source code of linux/sound/core/seq/oss/seq_oss_device.h