Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / staging / line6 / midi.h
blob78f903fb4d415a98969a8132b7bc0687faf42837
1 /*
2 * Line6 Linux USB driver - 0.9.1beta
4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
12 #ifndef MIDI_H
13 #define MIDI_H
15 #include <sound/rawmidi.h>
17 #include "midibuf.h"
19 #define MIDI_BUFFER_SIZE 1024
21 struct snd_line6_midi {
22 /**
23 Pointer back to the Line6 driver data structure.
25 struct usb_line6 *line6;
27 /**
28 MIDI substream for receiving (or NULL if not active).
30 struct snd_rawmidi_substream *substream_receive;
32 /**
33 MIDI substream for transmitting (or NULL if not active).
35 struct snd_rawmidi_substream *substream_transmit;
37 /**
38 Number of currently active MIDI send URBs.
40 int num_active_send_urbs;
42 /**
43 Spin lock to protect updates of send_urb.
45 spinlock_t send_urb_lock;
47 /**
48 Spin lock to protect MIDI buffer handling.
50 spinlock_t midi_transmit_lock;
52 /**
53 Wait queue for MIDI transmission.
55 wait_queue_head_t send_wait;
57 /**
58 Buffer for incoming MIDI stream.
60 struct midi_buffer midibuf_in;
62 /**
63 Buffer for outgoing MIDI stream.
65 struct midi_buffer midibuf_out;
68 extern int line6_init_midi(struct usb_line6 *line6);
69 extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
70 int length);
72 #endif