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/* $OpenBSD: ics2101.c,v 1.2 1996/03/08 16:42:57 niklas Exp $ */
/* $NetBSD: ics2101.c,v 1.3 1996/02/05 02:22:11 jtc Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ken Hornstein and John Kohl.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 REGENTS OR CONTRIBUTORS 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/ics2101reg.h>
#include <dev/isa/ics2101var.h>
#define ICS_VALUE 0x01
#define ICS_MUTE 0x02
#define ICS_MUTE_MUTED 0x04
/* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
[ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
#define cvt_value(val) ((val) >> 1)
/*
* Program one channel of the ICS mixer
*/
static void
ics2101_mix_doit(sc, chan, side, value, flags)
struct ics2101_softc *sc;
unsigned int chan, side, value, flags;
{
unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
register unsigned char ctrl_addr;
register unsigned char attn_addr;
register unsigned char normal;
int s;
if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
return;
if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
return;
if (flags & ICS_MUTE) {
value = cvt_value(sc->sc_setting[chan][side]);
sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
} else if (flags & ICS_VALUE) {
sc->sc_setting[chan][side] = value;
value = cvt_value(value);
if (value > ICSMIX_MIN_ATTN)
value = ICSMIX_MIN_ATTN;
} else
return;
ctrl_addr = chan << 3;
attn_addr = chan << 3;
if (side == ICSMIX_LEFT) {
ctrl_addr |= ICSMIX_CTRL_LEFT;
attn_addr |= ICSMIX_ATTN_LEFT;
if (sc->sc_mute[chan][side])
normal = 0x0;
else if (sc->sc_flags & ICS_FLIP)
normal = flip_left[chan];
else
normal = 0x01;
} else {
ctrl_addr |= ICSMIX_CTRL_RIGHT;
attn_addr |= ICSMIX_ATTN_RIGHT;
if (sc->sc_mute[chan][side])
normal = 0x0;
else if (sc->sc_flags & ICS_FLIP)
normal = flip_right[chan];
else
normal = 0x02;
}
s = splaudio();
outb(sc->sc_selio, ctrl_addr);
outb(sc->sc_dataio, normal);
outb(sc->sc_selio, attn_addr);
outb(sc->sc_dataio, (unsigned char) value);
splx(s);
}
void
ics2101_mix_mute(sc, chan, side, domute)
struct ics2101_softc *sc;
unsigned int chan, side, domute;
{
ics2101_mix_doit(sc, chan, side, 0,
domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
}
void
ics2101_mix_attenuate(sc, chan, side, value)
struct ics2101_softc *sc;
unsigned int chan, side, value;
{
ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
}
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