NetBSD/sys/arch/mac68k/dev/asc.c

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