asc.c revision 1.13
1 /* $NetBSD: asc.c,v 1.13 1996/10/13 03:21:15 christos 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 #include <machine/cpu.h> 48 49 #include "ascvar.h" 50 51 /* Global ASC location */ 52 volatile unsigned char *ASCBase = (unsigned char *) 0x14000; 53 54 55 /* bell support data */ 56 static int bell_freq = 1880; 57 static int bell_length = 10; 58 static int bell_volume = 100; 59 static int bell_ringing = 0; 60 61 static int ascmatch __P((struct device *, void *, void *)); 62 static void ascattach __P((struct device *, struct device *, void *)); 63 64 struct cfattach asc_ca = { 65 sizeof(struct device), ascmatch, ascattach 66 }; 67 68 struct cfdriver asc_cd = { 69 NULL, "asc", DV_DULL, NULL, 0 70 }; 71 72 static int 73 ascmatch(pdp, match, auxp) 74 struct device *pdp; 75 void *match, *auxp; 76 { 77 return 1; 78 } 79 80 static void 81 ascattach(parent, dev, aux) 82 struct device *parent, *dev; 83 void *aux; 84 { 85 printf(" Apple sound chip.\n"); 86 } 87 88 int 89 asc_setbellparams(freq, length, volume) 90 int freq; 91 int length; 92 int volume; 93 { 94 /* I only perform these checks for sanity. */ 95 /* I suppose someone might want a bell that rings */ 96 /* all day, but then the can make kernel mods themselves. */ 97 98 if (freq < 10 || freq > 40000) 99 return (EINVAL); 100 if (length < 0 || length > 3600) 101 return (EINVAL); 102 if (volume < 0 || volume > 100) 103 return (EINVAL); 104 105 bell_freq = freq; 106 bell_length = length; 107 bell_volume = volume; 108 109 return (0); 110 } 111 112 113 int 114 asc_getbellparams(freq, length, volume) 115 int *freq; 116 int *length; 117 int *volume; 118 { 119 *freq = bell_freq; 120 *length = bell_length; 121 *volume = bell_volume; 122 123 return (0); 124 } 125 126 127 void 128 asc_bellstop(param) 129 int param; 130 { 131 if (bell_ringing > 1000 || bell_ringing < 0) 132 panic("bell got out of synch?????"); 133 if (--bell_ringing == 0) { 134 ASCBase[0x801] = 0; 135 } 136 /* disable ASC */ 137 } 138 139 140 int 141 asc_ringbell() 142 { 143 int i; 144 unsigned long freq; 145 146 if (bell_ringing == 0) { 147 for (i = 0; i < 0x800; i++) 148 ASCBase[i] = 0; 149 150 for (i = 0; i < 256; i++) { 151 ASCBase[i] = i / 4; 152 ASCBase[i + 512] = i / 4; 153 ASCBase[i + 1024] = i / 4; 154 ASCBase[i + 1536] = i / 4; 155 } /* up part of wave, four voices ? */ 156 for (i = 0; i < 256; i++) { 157 ASCBase[i + 256] = 0x3f - (i / 4); 158 ASCBase[i + 768] = 0x3f - (i / 4); 159 ASCBase[i + 1280] = 0x3f - (i / 4); 160 ASCBase[i + 1792] = 0x3f - (i / 4); 161 } /* down part of wave, four voices ? */ 162 163 /* Fix this. Need to find exact ASC sampling freq */ 164 freq = 65536 * bell_freq / 466; 165 166 /* printf("beep: from %d, %02x %02x %02x %02x\n", 167 * cur_beep.freq, (freq >> 24) & 0xff, (freq >> 16) & 0xff, 168 * (freq >> 8) & 0xff, (freq) & 0xff); */ 169 for (i = 0; i < 8; i++) { 170 ASCBase[0x814 + 8 * i] = (freq >> 24) & 0xff; 171 ASCBase[0x815 + 8 * i] = (freq >> 16) & 0xff; 172 ASCBase[0x816 + 8 * i] = (freq >> 8) & 0xff; 173 ASCBase[0x817 + 8 * i] = (freq) & 0xff; 174 } /* frequency; should put cur_beep.freq in here 175 * somewhere. */ 176 177 ASCBase[0x807] = 3; /* 44 ? */ 178 ASCBase[0x806] = 255 * bell_volume / 100; 179 ASCBase[0x805] = 0; 180 ASCBase[0x80f] = 0; 181 ASCBase[0x802] = 2; /* sampled */ 182 ASCBase[0x801] = 2; /* enable sampled */ 183 } 184 bell_ringing++; 185 timeout((void *) asc_bellstop, 0, bell_length); 186 187 return 0; 188 } 189
Indexes created Fri Sep 26 08:10:20 GMT 2025