1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Line 6 Linux USB driver
 4 *
 5 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
 6 */
 7
 8#ifndef MIDI_H
 9#define MIDI_H
10
11#include <sound/rawmidi.h>
12
13#include "midibuf.h"
14
15#define MIDI_BUFFER_SIZE 1024
16
17struct snd_line6_midi {
18	/* Pointer back to the Line 6 driver data structure */
19	struct usb_line6 *line6;
20
21	/* MIDI substream for receiving (or NULL if not active) */
22	struct snd_rawmidi_substream *substream_receive;
23
24	/* MIDI substream for transmitting (or NULL if not active) */
25	struct snd_rawmidi_substream *substream_transmit;
26
27	/* Number of currently active MIDI send URBs */
28	int num_active_send_urbs;
29
30	/* Spin lock to protect MIDI buffer handling */
31	spinlock_t lock;
32
33	/* Wait queue for MIDI transmission */
34	wait_queue_head_t send_wait;
35
36	/* Buffer for incoming MIDI stream */
37	struct midi_buffer midibuf_in;
38
39	/* Buffer for outgoing MIDI stream */
40	struct midi_buffer midibuf_out;
41};
42
43extern int line6_init_midi(struct usb_line6 *line6);
44extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
45			       int length);
46
47#endif