1 /* $NetBSD: ym2149.c,v 1.6 2012/02/12 16:34:07 matt 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 1.6 2012/02/12 16:34:07 matt 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 */
41 u_char ym2149_ioa; /* Soft-copy of port-A */
42
43 void
ym2149_init(void)44 ym2149_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