Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_RAWMIDI_H
#define __SOUND_RAWMIDI_H
 
/*
 *  Abstract layer for MIDI v1.0 stream
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 */
 
#include <sound/asound.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/device.h>
 
#if IS_ENABLED(CONFIG_SND_SEQUENCER)
#include <sound/seq_device.h>
#endif
 
/*
 *  Raw MIDI interface
 */
 
#define SNDRV_RAWMIDI_DEVICES		8
 
#define SNDRV_RAWMIDI_LFLG_OUTPUT	(1<<0)
#define SNDRV_RAWMIDI_LFLG_INPUT	(1<<1)
#define SNDRV_RAWMIDI_LFLG_OPEN		(3<<0)
#define SNDRV_RAWMIDI_LFLG_APPEND	(1<<2)
 
struct snd_rawmidi;
struct snd_rawmidi_substream;
struct snd_seq_port_info;
struct pid;
 
struct snd_rawmidi_ops {
<------>int (*open) (struct snd_rawmidi_substream * substream);
<------>int (*close) (struct snd_rawmidi_substream * substream);
<------>void (*trigger) (struct snd_rawmidi_substream * substream, int up);
<------>void (*drain) (struct snd_rawmidi_substream * substream);
};
 
struct snd_rawmidi_global_ops {
<------>int (*dev_register) (struct snd_rawmidi * rmidi);
<------>int (*dev_unregister) (struct snd_rawmidi * rmidi);
<------>void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
<------><------><------>      struct snd_seq_port_info *info);
};
 
struct snd_rawmidi_runtime {
<------>struct snd_rawmidi_substream *substream;
<------>unsigned int drain: 1,	/* drain stage */
<------><------>     oss: 1;	/* OSS compatible mode */
<------>/* midi stream buffer */
<------>unsigned char *buffer;	/* buffer for MIDI data */
<------>size_t buffer_size;	/* size of buffer */
<------>size_t appl_ptr;	/* application pointer */
<------>size_t hw_ptr;		/* hardware pointer */
<------>size_t avail_min;	/* min avail for wakeup */
<------>size_t avail;		/* max used buffer for wakeup */
<------>size_t xruns;		/* over/underruns counter */
<------>int buffer_ref;		/* buffer reference count */
<------>/* misc */
<------>spinlock_t lock;
<------>wait_queue_head_t sleep;
<------>/* event handler (new bytes, input only) */
<------>void (*event)(struct snd_rawmidi_substream *substream);
<------>/* defers calls to event [input] or ops->trigger [output] */
<------>struct work_struct event_work;
<------>/* private data */
<------>void *private_data;
<------>void (*private_free)(struct snd_rawmidi_substream *substream);
};
 
struct snd_rawmidi_substream {
<------>struct list_head list;		/* list of all substream for given stream */
<------>int stream;			/* direction */
<------>int number;			/* substream number */
<------>bool opened;			/* open flag */
<------>bool append;			/* append flag (merge more streams) */
<------>bool active_sensing;		/* send active sensing when close */
<------>int use_count;			/* use counter (for output) */
<------>size_t bytes;
<------>struct snd_rawmidi *rmidi;
<------>struct snd_rawmidi_str *pstr;
<------>char name[32];
<------>struct snd_rawmidi_runtime *runtime;
<------>struct pid *pid;
<------>/* hardware layer */
<------>const struct snd_rawmidi_ops *ops;
};
 
struct snd_rawmidi_file {
<------>struct snd_rawmidi *rmidi;
<------>struct snd_rawmidi_substream *input;
<------>struct snd_rawmidi_substream *output;
};
 
struct snd_rawmidi_str {
<------>unsigned int substream_count;
<------>unsigned int substream_opened;
<------>struct list_head substreams;
};
 
struct snd_rawmidi {
<------>struct snd_card *card;
<------>struct list_head list;
<------>unsigned int device;		/* device number */
<------>unsigned int info_flags;	/* SNDRV_RAWMIDI_INFO_XXXX */
<------>char id[64];
<------>char name[80];
 
#ifdef CONFIG_SND_OSSEMUL
<------>int ossreg;
#endif
 
<------>const struct snd_rawmidi_global_ops *ops;
 
<------>struct snd_rawmidi_str streams[2];
 
<------>void *private_data;
<------>void (*private_free) (struct snd_rawmidi *rmidi);
 
<------>struct mutex open_mutex;
<------>wait_queue_head_t open_wait;
 
<------>struct device dev;
 
<------>struct snd_info_entry *proc_entry;
 
#if IS_ENABLED(CONFIG_SND_SEQUENCER)
<------>struct snd_seq_device *seq_dev;
#endif
};
 
/* main rawmidi functions */
 
int snd_rawmidi_new(struct snd_card *card, char *id, int device,
<------><------>    int output_count, int input_count,
<------><------>    struct snd_rawmidi **rmidi);
void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
<------><------><------> const struct snd_rawmidi_ops *ops);
 
/* callbacks */
 
int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
<------><------><------>const unsigned char *buffer, int count);
int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
<------><------><------>      unsigned char *buffer, int count);
int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
<------><------><------> unsigned char *buffer, int count);
int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
<------><------><------>      unsigned char *buffer, int count);
int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream,
<------><------><------>       int count);
int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream);
 
/* main midi functions */
 
int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
<------><------><------>    int mode, struct snd_rawmidi_file *rfile);
int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
<------><------><------>      struct snd_rawmidi_params *params);
int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
<------><------><------>     struct snd_rawmidi_params *params);
int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
<------><------><------>     unsigned char *buf, long count);
long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
<------><------><------>      const unsigned char *buf, long count);
 
#endif /* __SOUND_RAWMIDI_H */