1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Line 6 Linux USB driver 3 * Line 6 Linux USB driver
4 * 4 *
5 * Copyright (C) 2004-2010 Markus Grabner (lin 5 * Copyright (C) 2004-2010 Markus Grabner (line6@grabner-graz.at)
6 */ 6 */
7 7
8 #ifndef MIDI_H 8 #ifndef MIDI_H
9 #define MIDI_H 9 #define MIDI_H
10 10
11 #include <sound/rawmidi.h> 11 #include <sound/rawmidi.h>
12 12
13 #include "midibuf.h" 13 #include "midibuf.h"
14 14
15 #define MIDI_BUFFER_SIZE 1024 15 #define MIDI_BUFFER_SIZE 1024
16 16
17 struct snd_line6_midi { 17 struct snd_line6_midi {
18 /* Pointer back to the Line 6 driver d 18 /* Pointer back to the Line 6 driver data structure */
19 struct usb_line6 *line6; 19 struct usb_line6 *line6;
20 20
21 /* MIDI substream for receiving (or NU 21 /* MIDI substream for receiving (or NULL if not active) */
22 struct snd_rawmidi_substream *substrea 22 struct snd_rawmidi_substream *substream_receive;
23 23
24 /* MIDI substream for transmitting (or 24 /* MIDI substream for transmitting (or NULL if not active) */
25 struct snd_rawmidi_substream *substrea 25 struct snd_rawmidi_substream *substream_transmit;
26 26
27 /* Number of currently active MIDI sen 27 /* Number of currently active MIDI send URBs */
28 int num_active_send_urbs; 28 int num_active_send_urbs;
29 29
30 /* Spin lock to protect MIDI buffer ha 30 /* Spin lock to protect MIDI buffer handling */
31 spinlock_t lock; 31 spinlock_t lock;
32 32
33 /* Wait queue for MIDI transmission */ 33 /* Wait queue for MIDI transmission */
34 wait_queue_head_t send_wait; 34 wait_queue_head_t send_wait;
35 35
36 /* Buffer for incoming MIDI stream */ 36 /* Buffer for incoming MIDI stream */
37 struct midi_buffer midibuf_in; 37 struct midi_buffer midibuf_in;
38 38
39 /* Buffer for outgoing MIDI stream */ 39 /* Buffer for outgoing MIDI stream */
40 struct midi_buffer midibuf_out; 40 struct midi_buffer midibuf_out;
41 }; 41 };
42 42
43 extern int line6_init_midi(struct usb_line6 *l 43 extern int line6_init_midi(struct usb_line6 *line6);
44 extern void line6_midi_receive(struct usb_line 44 extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
45 int length); 45 int length);
46 46
47 #endif 47 #endif
48 48
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