sys/arch/atari/dev/ym2149.c

   1 /*      $NetBSD: ym2149.c,v 1.4 2005/12/11 12:16:54 christos 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 1.4 2005/12/11 12:16:54 christos 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
  44 ym2149_init()
  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 }