text: /*	$OpenBSD: mpuvar.h,v 1.6 2008/06/26 05:42:15 ray Exp $	*/
  /*	$NetBSD: mpu401var.h,v 1.3 1998/11/25 22:17:06 augustss Exp $	*/
  
  /*
   * Copyright (c) 1998 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Lennart Augustsson (augustss@netbsd.org).
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  struct mpu_softc {
  	bus_space_tag_t iot;		/* tag */
  	bus_space_handle_t ioh;		/* handle */
  	int	iobase;
  	int	open;
  	void	(*intr)(void *, int);	/* midi input intr handler */
  	void	*arg;			/* arg for intr() */
  };
  
  extern struct midi_hw_if mpu_midi_hw_if;
  
  int	mpu_intr(void *);
  int	mpu_find(void *);
  int	mpu_open(void *, int,
  		 void (*iintr)(void *, int),
  		 void (*ointr)(void *), void *arg);
  void	mpu_close(void *);
  int	mpu_output(void *, int);
  void	mpu_getinfo(void *addr, struct midi_info *mi);
  
  #define MPU401_NPORT		2
  #define MPU_DATA		0
  #define MPU_COMMAND		1
  #define  MPU_RESET		0xff
  #define  MPU_UART_MODE		0x3f
  #define  MPU_ACK		0xfe
  #define MPU_STATUS		1
  #define  MPU_OUTPUT_BUSY	0x40
  #define  MPU_INPUT_EMPTY	0x80
  
  #define MPU_MAXWAIT	10000	/* usec/10 to wait */
  