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https://github.com/torvalds/linux
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bc518ba4cc
The midi_transmit_lock is used always inside the send_urb_lock, thus it doesn't play any role. Let's kill it. Also, rename "send_urb_lock" as a more simple name "lock" since this is the only lock for midi. Tested-by: Chris Rorvick <chris@rorvick.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/*
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* Line 6 Linux USB driver
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*
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* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#ifndef MIDI_H
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#define MIDI_H
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#include <sound/rawmidi.h>
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#include "midibuf.h"
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#define MIDI_BUFFER_SIZE 1024
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struct snd_line6_midi {
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/**
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Pointer back to the Line 6 driver data structure.
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*/
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struct usb_line6 *line6;
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/**
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MIDI substream for receiving (or NULL if not active).
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*/
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struct snd_rawmidi_substream *substream_receive;
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/**
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MIDI substream for transmitting (or NULL if not active).
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*/
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struct snd_rawmidi_substream *substream_transmit;
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/**
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Number of currently active MIDI send URBs.
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*/
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int num_active_send_urbs;
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/**
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Spin lock to protect MIDI buffer handling.
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*/
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spinlock_t lock;
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/**
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Wait queue for MIDI transmission.
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*/
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wait_queue_head_t send_wait;
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/**
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Buffer for incoming MIDI stream.
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*/
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struct midi_buffer midibuf_in;
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/**
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Buffer for outgoing MIDI stream.
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*/
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struct midi_buffer midibuf_out;
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};
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extern int line6_init_midi(struct usb_line6 *line6);
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extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
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int length);
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#endif
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