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(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(dp->cseq);
148	err = snd_seq_kernel_client_ctl(dp->cseq, type, arg);
149	snd_seq_client_ioctl_unlock(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 */