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opm.c revision 1.2 
      1 /*	$NetBSD: opm.c,v 1.2 1996/05/21 15:32:34 oki Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Masanobu Saitoh, Takuya Harakawa.
      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 Masanobu Saitoh.
     18  * 4. Neither the name of the University nor of the Laboratory may be used
     19  *    to endorse or promote products derived from this software without
     20  *    specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include "fd.h"
     36 /*#include "bsdaudio.h"*/
     37 #include "bell.h"
     38 
     39 #if ((NBSDAUDIO > 0) || (NFD > 0) || (NBELL > 0))
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <x68k/dev/opmreg.h>
     44 #include <x68k/dev/bsd_audioreg.h>
     45 #include <x68k/x68k/iodevice.h>
     46 
     47 static u_char opmreg[0x100];
     48 static struct opm_voice vdata[8];
     49 
     50 void opm_set_voice(int, struct opm_voice *);
     51 void opm_set_voice_sub(int, struct opm_operator *);
     52 
     53 static inline void
     54 writeopm(reg, dat)
     55 	int reg, dat;
     56 {
     57 	while (OPM.data & 0x80);
     58 	OPM.reg = reg;
     59 	while (OPM.data & 0x80);
     60 	OPM.data = opmreg[reg] = dat;
     61 }
     62 
     63 static inline int
     64 readopm(reg)
     65 	int reg;
     66 {
     67 	return opmreg[reg];
     68 }
     69 
     70 void
     71 adpcm_chgclk(clk)
     72 	u_char	clk;
     73 {
     74 	writeopm(0x1b, readopm(0x1b) & ~OPM1B_CT1MSK | clk);
     75 }
     76 
     77 void
     78 fdc_force_ready(rdy)
     79 	u_char	rdy;
     80 {
     81 	writeopm(0x1b, readopm(0x1b) & ~OPM1B_CT2MSK | rdy);
     82 }
     83 
     84 void
     85 opm_key_on(channel)
     86 	u_char	channel;
     87 {
     88     writeopm(0x08, vdata[channel].sm << 3 | channel);
     89 }
     90 
     91 void
     92 opm_key_off(channel)
     93 	u_char	channel;
     94 {
     95     writeopm(0x08, channel);
     96 }
     97 
     98 void
     99 opm_set_voice(channel, voice)
    100 	int channel;
    101 	struct opm_voice *voice;
    102 {
    103 	bcopy(voice, &vdata[channel], sizeof(struct opm_voice));
    104 
    105 	opm_set_voice_sub(0x40 + channel, &voice->m1);
    106 	opm_set_voice_sub(0x48 + channel, &voice->m2);
    107 	opm_set_voice_sub(0x50 + channel, &voice->c1);
    108 	opm_set_voice_sub(0x58 + channel, &voice->c2);
    109 	writeopm(0x20 + channel, 0xc0 | (voice->fb & 0x7) << 3 | (voice->con & 0x7));
    110 }
    111 
    112 void
    113 opm_set_voice_sub(reg, op)
    114 	register int reg;
    115 	struct opm_operator *op;
    116 {
    117     /* DT1/MUL */
    118     writeopm(reg, (op->dt1 & 0x7) << 3 | (op->mul & 0x7));
    119 
    120     /* TL */
    121     writeopm(reg + 0x20, op->tl & 0x7f);
    122 
    123     /* KS/AR */
    124     writeopm(reg + 0x40, (op->ks & 0x3) << 6 | (op->ar & 0x1f));
    125 
    126     /* AMS/D1R */
    127     writeopm(reg + 0x60, (op->ame & 0x1) << 7 | (op->d1r & 0x1f));
    128 
    129     /* DT2/D2R */
    130     writeopm(reg + 0x80, (op->dt2 & 0x3) << 6 | (op->d2r & 0x1f));
    131 
    132     /* D1L/RR */
    133     writeopm(reg + 0xa0, (op->d1l & 0xf) << 4 | (op->rr & 0xf));
    134 }
    135 
    136 void
    137 opm_set_volume(channel, volume)
    138 	int channel;
    139 	int volume;
    140 {
    141     int value;
    142 
    143     switch (vdata[channel].con) {
    144     case 7:
    145 	value = vdata[channel].m1.tl + volume;
    146 	writeopm(0x60 + channel, ((value > 0x7f) ? 0x7f : value));
    147     case 6:
    148     case 5:
    149 	value = vdata[channel].m2.tl + volume;
    150 	writeopm(0x68 + channel, ((value > 0x7f) ? 0x7f : value));
    151     case 4:
    152 	value = vdata[channel].c1.tl + volume;
    153 	writeopm(0x70 + channel, ((value > 0x7f) ? 0x7f : value));
    154     case 3:
    155     case 2:
    156     case 1:
    157     case 0:
    158 	value = vdata[channel].c2.tl + volume;
    159 	writeopm(0x78 + channel, ((value > 0x7f) ? 0x7f : value));
    160     }
    161 }
    162 
    163 void
    164 opm_set_key(channel, tone)
    165 	int channel;
    166 	int tone;
    167 {
    168 	writeopm(0x28 + channel, tone >> 8);
    169 	writeopm(0x30 + channel, tone & 0xff);
    170 }
    171 
    172 /*ARGSUSED*/
    173 int
    174 opmopen(dev, flag, mode)
    175 	dev_t dev;
    176 {
    177 	return 0;
    178 }
    179 
    180 /*ARGSUSED*/
    181 int
    182 opmclose(dev)
    183 	dev_t dev;
    184 {
    185 	return 0;
    186 }
    187 
    188 #endif
    189