linux_dsm_epyc7002/sound/usb/line6/midi.h
Takashi Iwai 61864d844c ALSA: move line6 usb driver into sound/usb
Promote line6 driver from staging to sound/usb/line6 directory, and
maintain through sound subsystem tree.

This commit just moves the code and adapts Makefile / Kconfig.
The further renames and misc cleanups will follow.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-01-12 22:29:57 +01:00

73 lines
1.4 KiB
C

/*
* Line6 Linux USB driver - 0.9.1beta
*
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
*/
#ifndef MIDI_H
#define MIDI_H
#include <sound/rawmidi.h>
#include "midibuf.h"
#define MIDI_BUFFER_SIZE 1024
struct snd_line6_midi {
/**
Pointer back to the Line6 driver data structure.
*/
struct usb_line6 *line6;
/**
MIDI substream for receiving (or NULL if not active).
*/
struct snd_rawmidi_substream *substream_receive;
/**
MIDI substream for transmitting (or NULL if not active).
*/
struct snd_rawmidi_substream *substream_transmit;
/**
Number of currently active MIDI send URBs.
*/
int num_active_send_urbs;
/**
Spin lock to protect updates of send_urb.
*/
spinlock_t send_urb_lock;
/**
Spin lock to protect MIDI buffer handling.
*/
spinlock_t midi_transmit_lock;
/**
Wait queue for MIDI transmission.
*/
wait_queue_head_t send_wait;
/**
Buffer for incoming MIDI stream.
*/
struct midi_buffer midibuf_in;
/**
Buffer for outgoing MIDI stream.
*/
struct midi_buffer midibuf_out;
};
extern int line6_init_midi(struct usb_line6 *line6);
extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
int length);
#endif