asc.c revision 1.14
1 /* $NetBSD: asc.c,v 1.14 1996/11/09 17:26:26 briggs Exp $ */ 2 3 /*- 4 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 5 * Michael L. Finch, Bradley A. Grantham, and 6 * Lawrence A. Kesteloot 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the Alice Group. 20 * 4. The names of the Alice Group or any of its members may not be used 21 * to endorse or promote products derived from this software without 22 * specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * ASC driver code and asc_ringbell() support 38 */ 39 40 #include <sys/types.h> 41 #include <sys/cdefs.h> 42 #include <sys/errno.h> 43 #include <sys/time.h> 44 #include <sys/systm.h> 45 #include <sys/param.h> 46 #include <sys/device.h> 47 48 #include <machine/autoconf.h> 49 #include <machine/cpu.h> 50 51 #include "ascvar.h" 52 53 /* Global ASC location */ 54 volatile unsigned char *ASCBase = (unsigned char *) 0x14000; 55 56 57 /* bell support data */ 58 static int asc_configured = 0; 59 static int bell_freq = 1880; 60 static int bell_length = 10; 61 static int bell_volume = 100; 62 static int bell_ringing = 0; 63 64 static int ascmatch __P((struct device *, void *, void *)); 65 static void ascattach __P((struct device *, struct device *, void *)); 66 67 struct cfattach asc_ca = { 68 sizeof(struct device), ascmatch, ascattach 69 }; 70 71 struct cfdriver asc_cd = { 72 NULL, "asc", DV_DULL, NULL, 0 73 }; 74 75 static int 76 ascmatch(pdp, match, auxp) 77 struct device *pdp; 78 void *match, *auxp; 79 { 80 if (badbaddr((unsigned char *) ASCBase)) 81 return 0; 82 return 1; 83 } 84 85 static void 86 ascattach(parent, dev, aux) 87 struct device *parent, *dev; 88 void *aux; 89 { 90 printf(" Apple sound chip.\n"); 91 asc_configured = 1; 92 } 93 94 int 95 asc_setbellparams(freq, length, volume) 96 int freq; 97 int length; 98 int volume; 99 { 100 if (!asc_configured) return (ENODEV); 101 102 /* I only perform these checks for sanity. */ 103 /* I suppose someone might want a bell that rings */ 104 /* all day, but then the can make kernel mods themselves. */ 105 106 if (freq < 10 || freq > 40000) 107 return (EINVAL); 108 if (length < 0 || length > 3600) 109 return (EINVAL); 110 if (volume < 0 || volume > 100) 111 return (EINVAL); 112 113 bell_freq = freq; 114 bell_length = length; 115 bell_volume = volume; 116 117 return (0); 118 } 119 120 121 int 122 asc_getbellparams(freq, length, volume) 123 int *freq; 124 int *length; 125 int *volume; 126 { 127 if (!asc_configured) return (ENODEV); 128 129 *freq = bell_freq; 130 *length = bell_length; 131 *volume = bell_volume; 132 133 return (0); 134 } 135 136 137 void 138 asc_bellstop(param) 139 int param; 140 { 141 if (!asc_configured) return; 142 143 if (bell_ringing > 1000 || bell_ringing < 0) 144 panic("bell got out of synch?????"); 145 if (--bell_ringing == 0) { 146 ASCBase[0x801] = 0; 147 } 148 /* disable ASC */ 149 } 150 151 152 int 153 asc_ringbell() 154 { 155 int i; 156 unsigned long freq; 157 158 if (!asc_configured) return (ENODEV); 159 160 if (bell_ringing == 0) { 161 for (i = 0; i < 0x800; i++) 162 ASCBase[i] = 0; 163 164 for (i = 0; i < 256; i++) { 165 ASCBase[i] = i / 4; 166 ASCBase[i + 512] = i / 4; 167 ASCBase[i + 1024] = i / 4; 168 ASCBase[i + 1536] = i / 4; 169 } /* up part of wave, four voices ? */ 170 for (i = 0; i < 256; i++) { 171 ASCBase[i + 256] = 0x3f - (i / 4); 172 ASCBase[i + 768] = 0x3f - (i / 4); 173 ASCBase[i + 1280] = 0x3f - (i / 4); 174 ASCBase[i + 1792] = 0x3f - (i / 4); 175 } /* down part of wave, four voices ? */ 176 177 /* Fix this. Need to find exact ASC sampling freq */ 178 freq = 65536 * bell_freq / 466; 179 180 /* printf("beep: from %d, %02x %02x %02x %02x\n", 181 * cur_beep.freq, (freq >> 24) & 0xff, (freq >> 16) & 0xff, 182 * (freq >> 8) & 0xff, (freq) & 0xff); */ 183 for (i = 0; i < 8; i++) { 184 ASCBase[0x814 + 8 * i] = (freq >> 24) & 0xff; 185 ASCBase[0x815 + 8 * i] = (freq >> 16) & 0xff; 186 ASCBase[0x816 + 8 * i] = (freq >> 8) & 0xff; 187 ASCBase[0x817 + 8 * i] = (freq) & 0xff; 188 } /* frequency; should put cur_beep.freq in here 189 * somewhere. */ 190 191 ASCBase[0x807] = 3; /* 44 ? */ 192 ASCBase[0x806] = 255 * bell_volume / 100; 193 ASCBase[0x805] = 0; 194 ASCBase[0x80f] = 0; 195 ASCBase[0x802] = 2; /* sampled */ 196 ASCBase[0x801] = 2; /* enable sampled */ 197 } 198 bell_ringing++; 199 timeout((void *) asc_bellstop, 0, bell_length); 200 201 return 0; 202 } 203
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