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ym2149.c revision 1.1 
      1 /*	$NetBSD: ym2149.c,v 1.1 1996/03/27 10:08:32 leo 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Leo Weppelman.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <machine/iomap.h>
     36 #include <atari/dev/ym2149reg.h>
     37 
     38 /*
     39  * Yahama YM-2149 Programmable Sound Generator
     40  *
     41  * For now only an init function is here...
     42  */
     43 u_char	ym2149_ioa;	/* Soft-copy of port-A			*/
     44 
     45 void
     46 ym2149_init()
     47 {
     48 	/*
     49 	 * Initialize the sound-chip YM2149:
     50 	 *   All sounds off, both I/O ports output.
     51 	 */
     52 	YM2149->sd_selr = YM_MFR;
     53 	YM2149->sd_wdat = 0xff;
     54 
     55 	/*
     56 	 * Sensible value for ioa:
     57 	 */
     58 	YM2149->sd_selr = YM_IOA;
     59 	YM2149->sd_wdat = ym2149_ioa = PA_FDSEL|PA_PSTROBE|PA_SER2;
     60 }
     61