183 lines
4.6 KiB
C
183 lines
4.6 KiB
C
/*-
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* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
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* Michael L. Finch, Bradley A. Grantham, and
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* Lawrence A. Kesteloot
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Alice Group.
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* 4. The names of the Alice Group or any of its members may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* ASC driver code and asc_ringbell() support
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*
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* $Id: asc.c,v 1.1 1993/12/21 03:16:05 briggs Exp $
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*
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* 12/12/93 01:14:45 grantham
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* initial revision
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*
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* $Log: asc.c,v $
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* Revision 1.1 1993/12/21 03:16:05 briggs
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* Add basic sound support and a beeping (instead of flashing) console...
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* from Brad Grantham.
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*
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*/
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <sys/param.h>
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/* Global ASC location */
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unsigned char *ASCBase = (unsigned char *)0x50014000;
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/* bell support data */
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static int bell_freq = 1880;
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static int bell_length = 10;
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static int bell_volume = 100;
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static int bell_ringing = 0;
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#if 0
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int asc_probe()
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{
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}
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int asc_attach(int n)
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{
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/* Check gestalt values and set ASCBase properly, */
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/* or use value from MacOS */
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}
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#endif
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int asc_setbellparams(
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int freq,
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int length,
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int volume)
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{
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/* I only perform these checks for sanity. */
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/* I suppose someone might want a bell that rings */
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/* all day, but then the can make kernel mods themselves. */
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if(freq < 10 || freq > 40000)
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return(EINVAL);
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if(length < 0 || length > 3600)
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return(EINVAL);
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if(volume < 0 || volume > 100)
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return(EINVAL);
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bell_freq = freq;
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bell_length = length;
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bell_volume = volume;
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return(0);
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}
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int asc_getbellparams(
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int *freq,
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int *length,
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int *volume)
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{
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*freq = bell_freq;
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*length = bell_length;
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*volume = bell_volume;
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return(0);
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}
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void asc_bellstop(
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int param)
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{
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if(bell_ringing > 1000 || bell_ringing < 0)
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panic("bell got out of synch?????");
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if(--bell_ringing == 0){
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ASCBase[0x801] = 0;
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}
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/* disable ASC */
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}
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int asc_ringbell()
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{
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int i;
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unsigned long freq;
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if(bell_ringing == 0){
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for(i = 0; i < 0x800; i++)
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ASCBase[i] = 0;
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for(i = 0; i < 256;i++){
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ASCBase[i] = i / 4;
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ASCBase[i + 512] = i / 4;
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ASCBase[i + 1024] = i / 4;
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ASCBase[i + 1536] = i / 4;
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}/* up part of wave, four voices ? */
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for(i = 0; i < 256;i++){
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ASCBase[i + 256] = 0x3f - (i / 4);
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ASCBase[i + 768] = 0x3f - (i / 4);
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ASCBase[i + 1280] = 0x3f - (i / 4);
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ASCBase[i + 1792] = 0x3f - (i / 4);
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}/* down part of wave, four voices ? */
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/* Fix this. Need to find exact ASC sampling freq */
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freq = 65536 * bell_freq / 466;
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/* printf("beep: from %d, %02x %02x %02x %02x\n", cur_beep.freq,
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(freq >> 24) & 0xff, (freq >> 16) & 0xff,
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(freq >> 8) & 0xff, (freq) & 0xff);*/
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for(i = 0; i < 8; i++){
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ASCBase[0x814 + 8 * i] = (freq >> 24) & 0xff;
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ASCBase[0x815 + 8 * i] = (freq >> 16) & 0xff;
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ASCBase[0x816 + 8 * i] = (freq >> 8) & 0xff;
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ASCBase[0x817 + 8 * i] = (freq) & 0xff;
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}/* frequency; should put cur_beep.freq in here somewhere. */
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ASCBase[0x807] = 3; /* 44 ? */
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ASCBase[0x806] = 255 * bell_volume / 100;
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ASCBase[0x805] = 0;
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ASCBase[0x80f] = 0;
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ASCBase[0x802] = 2; /* sampled */
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ASCBase[0x801] = 2; /* enable sampled */
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}
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bell_ringing++;
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timeout((timeout_t)asc_bellstop, 0, bell_length);
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}
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