1 files changed, 47 insertions, 0 deletions
diff --git a/sound/usb/line6/midi.h b/sound/usb/line6/midi.h
new file mode 100644
index 000000000..918754e79
--- /dev/null
+++ b/sound/usb/line6/midi.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Line 6 Linux USB driver
+ *
+ * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
+ */
+
+#ifndef MIDI_H
+#define MIDI_H
+
+#include <sound/rawmidi.h>
+
+#include "midibuf.h"
+
+#define MIDI_BUFFER_SIZE 1024
+
+struct snd_line6_midi {
+	/* Pointer back to the Line 6 driver data structure */
+	struct usb_line6 *line6;
+
+	/* MIDI substream for receiving (or NULL if not active) */
+	struct snd_rawmidi_substream *substream_receive;
+
+	/* MIDI substream for transmitting (or NULL if not active) */
+	struct snd_rawmidi_substream *substream_transmit;
+
+	/* Number of currently active MIDI send URBs */
+	int num_active_send_urbs;
+
+	/* Spin lock to protect MIDI buffer handling */
+	spinlock_t lock;
+
+	/* Wait queue for MIDI transmission */
+	wait_queue_head_t send_wait;
+
+	/* Buffer for incoming MIDI stream */
+	struct midi_buffer midibuf_in;
+
+	/* Buffer for outgoing MIDI stream */
+	struct midi_buffer midibuf_out;
+};
+
+extern int line6_init_midi(struct usb_line6 *line6);
+extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
+			       int length);
+
+#endif