LXR linux/sound/core/seq/oss/seq_oss

   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(int bool);
 167
 168#endif /* __SEQ_OSS_DEVICE_H */
 169