/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * OSS compatible sequencer driver
 *
 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
 */

#ifndef __SEQ_OSS_DEVICE_H
#define __SEQ_OSS_DEVICE_H

#include <linux/time.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <sound/core.h>
#include <sound/seq_oss.h>
#include <sound/rawmidi.h>
#include <sound/seq_kernel.h>
#include <sound/info.h>
#include "../seq_clientmgr.h"

/* max. applications */
#define SNDRV_SEQ_OSS_MAX_CLIENTS       16
#define SNDRV_SEQ_OSS_MAX_SYNTH_DEVS    16
#define SNDRV_SEQ_OSS_MAX_MIDI_DEVS     32

/* version */
#define SNDRV_SEQ_OSS_MAJOR_VERSION     0
#define SNDRV_SEQ_OSS_MINOR_VERSION     1
#define SNDRV_SEQ_OSS_TINY_VERSION      8
#define SNDRV_SEQ_OSS_VERSION_STR       "0.1.8"

/* device and proc interface name */
#define SNDRV_SEQ_OSS_PROCNAME          "oss"


/*
 * type definitions
 */

typedef unsigned int reltime_t;
typedef unsigned int abstime_t;


/*
 * synthesizer channel information
 */
struct seq_oss_chinfo {
        int note, vel;
};

/*
 * synthesizer information
 */
struct seq_oss_synthinfo {
        struct snd_seq_oss_arg arg;
        struct seq_oss_chinfo *ch;
        int nr_voices;
        int opened;
        int is_midi;
        int midi_mapped;
};


/*
 * sequencer client information
 */

struct seq_oss_devinfo {

        int index;      /* application index */
        int cseq;       /* sequencer client number */
        int port;       /* sequencer port number */
        int queue;      /* sequencer queue number */

        struct snd_seq_addr addr;       /* address of this device */

        int seq_mode;   /* sequencer mode */
        int file_mode;  /* file access */

        /* midi device table */
        int max_mididev;

        /* synth device table */
        int max_synthdev;
        struct seq_oss_synthinfo synths[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
        int synth_opened;

        /* output queue */
        struct seq_oss_writeq *writeq;

        /* midi input queue */
        struct seq_oss_readq *readq;

        /* timer */
        struct seq_oss_timer *timer;
};


/*
 * function prototypes
 */

/* create/delete OSS sequencer client */
int snd_seq_oss_create_client(void);
int snd_seq_oss_delete_client(void);

/* device file interface */
int snd_seq_oss_open(struct file *file, int level);
void snd_seq_oss_release(struct seq_oss_devinfo *dp);
int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long arg);
int snd_seq_oss_read(struct seq_oss_devinfo *dev, char __user *buf, int count);
int snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt);
__poll_t snd_seq_oss_poll(struct seq_oss_devinfo *dp, struct file *file, poll_table * wait);

void snd_seq_oss_reset(struct seq_oss_devinfo *dp);

/* proc interface */
void snd_seq_oss_system_info_read(struct snd_info_buffer *buf);
void snd_seq_oss_midi_info_read(struct snd_info_buffer *buf);
void snd_seq_oss_synth_info_read(struct snd_info_buffer *buf);
void snd_seq_oss_readq_info_read(struct seq_oss_readq *q, struct snd_info_buffer *buf);

/* file mode macros */
#define is_read_mode(mode)      ((mode) & SNDRV_SEQ_OSS_FILE_READ)
#define is_write_mode(mode)     ((mode) & SNDRV_SEQ_OSS_FILE_WRITE)
#define is_nonblock_mode(mode)  ((mode) & SNDRV_SEQ_OSS_FILE_NONBLOCK)

/* dispatch event */
static inline int
snd_seq_oss_dispatch(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int atomic, int hop)
{
        return snd_seq_kernel_client_dispatch(dp->cseq, ev, atomic, hop);
}

/* ioctl for writeq */
static inline int
snd_seq_oss_control(struct seq_oss_devinfo *dp, unsigned int type, void *arg)
{
        return snd_seq_kernel_client_ioctl(dp->cseq, type, arg);
}

/* fill the addresses in header */
static inline void
snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
                     int dest_client, int dest_port)
{
        ev->queue = dp->queue;
        ev->source = dp->addr;
        ev->dest.client = dest_client;
        ev->dest.port = dest_port;
}

#endif /* __SEQ_OSS_DEVICE_H */