seq_oss_device.h

  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	int nr_voices;
 59	int opened;
 60	int is_midi;
 61	int midi_mapped;
 62};
 63
 64
 65/*
 66 * sequencer client information
 67 */
 68
 69struct seq_oss_devinfo {
 70
 71	int index;	/* application index */
 72	int cseq;	/* sequencer client number */
 73	int port;	/* sequencer port number */
 74	int queue;	/* sequencer queue number */
 75
 76	struct snd_seq_addr addr;	/* address of this device */
 77
 78	int seq_mode;	/* sequencer mode */
 79	int file_mode;	/* file access */
 80
 81	/* midi device table */
 82	int max_mididev;
 83
 84	/* synth device table */
 85	int max_synthdev;
 86	struct seq_oss_synthinfo synths[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
 87	int synth_opened;
 88
 89	/* output queue */
 90	struct seq_oss_writeq *writeq;
 91
 92	/* midi input queue */
 93	struct seq_oss_readq *readq;
 94
 95	/* timer */
 96	struct seq_oss_timer *timer;
 97};
 98
 99
100/*
101 * function prototypes
102 */
103
104/* create/delete OSS sequencer client */
105int snd_seq_oss_create_client(void);
106int snd_seq_oss_delete_client(void);
107
108/* device file interface */
109int snd_seq_oss_open(struct file *file, int level);
110void snd_seq_oss_release(struct seq_oss_devinfo *dp);
111int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long arg);
112int snd_seq_oss_read(struct seq_oss_devinfo *dev, char __user *buf, int count);
113int snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt);
114__poll_t snd_seq_oss_poll(struct seq_oss_devinfo *dp, struct file *file, poll_table * wait);
115
116void snd_seq_oss_reset(struct seq_oss_devinfo *dp);
117
118/* proc interface */
119void snd_seq_oss_system_info_read(struct snd_info_buffer *buf);
120void snd_seq_oss_midi_info_read(struct snd_info_buffer *buf);
121void snd_seq_oss_synth_info_read(struct snd_info_buffer *buf);
122void snd_seq_oss_readq_info_read(struct seq_oss_readq *q, struct snd_info_buffer *buf);
123
124/* file mode macros */
125#define is_read_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_READ)
126#define is_write_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_WRITE)
127#define is_nonblock_mode(mode)	((mode) & SNDRV_SEQ_OSS_FILE_NONBLOCK)
128
129/* dispatch event */
130static inline int
131snd_seq_oss_dispatch(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int atomic, int hop)
132{
133	return snd_seq_kernel_client_dispatch(dp->cseq, ev, atomic, hop);
134}
135
136/* ioctl for writeq */
137static inline int
138snd_seq_oss_control(struct seq_oss_devinfo *dp, unsigned int type, void *arg)
139{
140	return snd_seq_kernel_client_ioctl(dp->cseq, type, arg);
141}
142
143/* fill the addresses in header */
144static inline void
145snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
146		     int dest_client, int dest_port)
147{
148	ev->queue = dp->queue;
149	ev->source = dp->addr;
150	ev->dest.client = dest_client;
151	ev->dest.port = dest_port;
152}
153
154#endif /* __SEQ_OSS_DEVICE_H */