1/*	$NetBSD: ym2149.c,v 1.5 2009/10/20 19:10:11 snj Exp $	*/
2
3/*
4 * Copyright (c) 1996 Leo Weppelman.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: ym2149.c,v 1.5 2009/10/20 19:10:11 snj Exp $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <machine/iomap.h>
34#include <atari/dev/ym2149reg.h>
35
36/*
37 * Yahama YM-2149 Programmable Sound Generator
38 *
39 * For now only an init function is here...
40 */
41u_char	ym2149_ioa;	/* Soft-copy of port-A			*/
42
43void
44ym2149_init(void)
45{
46	/*
47	 * Initialize the sound-chip YM2149:
48	 *   All sounds off, both I/O ports output.
49	 */
50	YM2149->sd_selr = YM_MFR;
51	YM2149->sd_wdat = 0xff;
52
53	/*
54	 * Sensible value for ioa:
55	 */
56	YM2149->sd_selr = YM_IOA;
57	YM2149->sd_wdat = ym2149_ioa = PA_FDSEL|PA_PSTROBE;
58}
59