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      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
     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