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/* $NetBSD: asc.c,v 1.9 1995/11/01 04:58:21 briggs Exp $ */
/*-
* 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
*/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/device.h>
#include <machine/cpu.h>
/* Global ASC location */
volatile unsigned char *ASCBase = (unsigned char *) 0x14000;
/* bell support data */
static int bell_freq = 1880;
static int bell_length = 10;
static int bell_volume = 100;
static int bell_ringing = 0;
static int ascprobe __P((struct device *, struct cfdata *, void *));
static void ascattach __P((struct device *, struct device *, void *));
extern int matchbyname __P((struct device *, void *, void *));
struct cfdriver asccd =
{NULL, "asc", matchbyname, ascattach,
DV_DULL, sizeof(struct device), NULL, 0};
static int
ascprobe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
if (strcmp(*((char **) aux), asccd.cd_name))
return 0;
return 1;
}
static void
ascattach(parent, dev, aux)
struct device *parent, *dev;
void *aux;
{
printf(" Apple sound chip.\n");
}
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((void *) asc_bellstop, 0, bell_length);
}
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