1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Line 6 Linux USB driver 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef MIDI_H 9*4882a593Smuzhiyun #define MIDI_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <sound/rawmidi.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include "midibuf.h" 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define MIDI_BUFFER_SIZE 1024 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun struct snd_line6_midi { 18*4882a593Smuzhiyun /* Pointer back to the Line 6 driver data structure */ 19*4882a593Smuzhiyun struct usb_line6 *line6; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* MIDI substream for receiving (or NULL if not active) */ 22*4882a593Smuzhiyun struct snd_rawmidi_substream *substream_receive; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* MIDI substream for transmitting (or NULL if not active) */ 25*4882a593Smuzhiyun struct snd_rawmidi_substream *substream_transmit; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* Number of currently active MIDI send URBs */ 28*4882a593Smuzhiyun int num_active_send_urbs; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* Spin lock to protect MIDI buffer handling */ 31*4882a593Smuzhiyun spinlock_t lock; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* Wait queue for MIDI transmission */ 34*4882a593Smuzhiyun wait_queue_head_t send_wait; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* Buffer for incoming MIDI stream */ 37*4882a593Smuzhiyun struct midi_buffer midibuf_in; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* Buffer for outgoing MIDI stream */ 40*4882a593Smuzhiyun struct midi_buffer midibuf_out; 41*4882a593Smuzhiyun }; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun extern int line6_init_midi(struct usb_line6 *line6); 44*4882a593Smuzhiyun extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, 45*4882a593Smuzhiyun int length); 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #endif 48