asc.c revision 1.3
1 /*- 2 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 3 * Michael L. Finch, Bradley A. Grantham, and 4 * Lawrence A. Kesteloot 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 the Alice Group. 18 * 4. The names of the Alice Group or any of its members may not 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 ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 36 /* 37 * ASC driver code and asc_ringbell() support 38 * 39 * $Id: asc.c,v 1.3 1994/05/06 17:38:38 briggs Exp $ 40 * 41 * 12/12/93 01:14:45 grantham 42 * initial revision 43 * 44 * $Log: asc.c,v $ 45 * Revision 1.3 1994/05/06 17:38:38 briggs 46 * Missed some warnings... 47 * 48 * Revision 1.2 1994/05/06 03:34:53 briggs 49 * Clean up some warnings, mainly w/ timeout(). 50 * 51 * Revision 1.1 1993/12/21 03:16:05 briggs 52 * Add basic sound support and a beeping (instead of flashing) console... 53 * from Brad Grantham. 54 * 55 */ 56 57 58 #include <sys/types.h> 59 #include <sys/errno.h> 60 #include <sys/time.h> 61 #include <sys/systm.h> 62 #include <sys/param.h> 63 64 65 /* Global ASC location */ 66 unsigned char *ASCBase = (unsigned char *)0x50014000; 67 68 69 /* bell support data */ 70 static int bell_freq = 1880; 71 static int bell_length = 10; 72 static int bell_volume = 100; 73 static int bell_ringing = 0; 74 75 76 #if 0 77 78 79 int asc_probe() 80 { 81 } 82 83 84 int asc_attach(int n) 85 { 86 /* Check gestalt values and set ASCBase properly, */ 87 /* or use value from MacOS */ 88 } 89 90 91 #endif 92 93 94 95 int asc_setbellparams( 96 int freq, 97 int length, 98 int volume) 99 { 100 /* I only perform these checks for sanity. */ 101 /* I suppose someone might want a bell that rings */ 102 /* all day, but then the can make kernel mods themselves. */ 103 104 if(freq < 10 || freq > 40000) 105 return(EINVAL); 106 if(length < 0 || length > 3600) 107 return(EINVAL); 108 if(volume < 0 || volume > 100) 109 return(EINVAL); 110 111 bell_freq = freq; 112 bell_length = length; 113 bell_volume = volume; 114 115 return(0); 116 } 117 118 119 int asc_getbellparams( 120 int *freq, 121 int *length, 122 int *volume) 123 { 124 *freq = bell_freq; 125 *length = bell_length; 126 *volume = bell_volume; 127 128 return(0); 129 } 130 131 132 void asc_bellstop( 133 int param) 134 { 135 if(bell_ringing > 1000 || bell_ringing < 0) 136 panic("bell got out of synch?????"); 137 if(--bell_ringing == 0){ 138 ASCBase[0x801] = 0; 139 } 140 /* disable ASC */ 141 } 142 143 144 int asc_ringbell() 145 { 146 int i; 147 unsigned long freq; 148 149 if(bell_ringing == 0){ 150 for(i = 0; i < 0x800; i++) 151 ASCBase[i] = 0; 152 153 for(i = 0; i < 256;i++){ 154 ASCBase[i] = i / 4; 155 ASCBase[i + 512] = i / 4; 156 ASCBase[i + 1024] = i / 4; 157 ASCBase[i + 1536] = i / 4; 158 }/* up part of wave, four voices ? */ 159 for(i = 0; i < 256;i++){ 160 ASCBase[i + 256] = 0x3f - (i / 4); 161 ASCBase[i + 768] = 0x3f - (i / 4); 162 ASCBase[i + 1280] = 0x3f - (i / 4); 163 ASCBase[i + 1792] = 0x3f - (i / 4); 164 }/* down part of wave, four voices ? */ 165 166 /* Fix this. Need to find exact ASC sampling freq */ 167 freq = 65536 * bell_freq / 466; 168 169 /* printf("beep: from %d, %02x %02x %02x %02x\n", cur_beep.freq, 170 (freq >> 24) & 0xff, (freq >> 16) & 0xff, 171 (freq >> 8) & 0xff, (freq) & 0xff);*/ 172 for(i = 0; i < 8; i++){ 173 ASCBase[0x814 + 8 * i] = (freq >> 24) & 0xff; 174 ASCBase[0x815 + 8 * i] = (freq >> 16) & 0xff; 175 ASCBase[0x816 + 8 * i] = (freq >> 8) & 0xff; 176 ASCBase[0x817 + 8 * i] = (freq) & 0xff; 177 }/* frequency; should put cur_beep.freq in here somewhere. */ 178 179 ASCBase[0x807] = 3; /* 44 ? */ 180 ASCBase[0x806] = 255 * bell_volume / 100; 181 ASCBase[0x805] = 0; 182 ASCBase[0x80f] = 0; 183 ASCBase[0x802] = 2; /* sampled */ 184 ASCBase[0x801] = 2; /* enable sampled */ 185 } 186 187 bell_ringing++; 188 timeout((void *) asc_bellstop, 0, bell_length); 189 } 190
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