153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/* $NetBSD: ics2101.c,v 1.3 1996/02/05 02:22:11 jtc Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ken Hornstein and John Kohl.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/buf.h>
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#include <machine/cpu.h>
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#include <machine/pio.h>
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#include <sys/audioio.h>
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#include <dev/audio_if.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isadmavar.h>
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#include <dev/ic/ics2101reg.h>
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#include <dev/isa/ics2101var.h>
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#define ICS_VALUE 0x01
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#define ICS_MUTE 0x02
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#define ICS_MUTE_MUTED 0x04
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/* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
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[ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
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#define cvt_value(val) ((val) >> 1)
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/*
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* Program one channel of the ICS mixer
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*/
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static void
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ics2101_mix_doit(sc, chan, side, value, flags)
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struct ics2101_softc *sc;
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unsigned int chan, side, value, flags;
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{
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unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
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unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
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register unsigned char ctrl_addr;
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register unsigned char attn_addr;
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register unsigned char normal;
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int s;
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if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
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return;
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if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
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return;
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if (flags & ICS_MUTE) {
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value = cvt_value(sc->sc_setting[chan][side]);
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sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
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} else if (flags & ICS_VALUE) {
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sc->sc_setting[chan][side] = value;
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value = cvt_value(value);
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if (value > ICSMIX_MIN_ATTN)
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value = ICSMIX_MIN_ATTN;
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} else
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return;
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ctrl_addr = chan << 3;
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attn_addr = chan << 3;
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if (side == ICSMIX_LEFT) {
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ctrl_addr |= ICSMIX_CTRL_LEFT;
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attn_addr |= ICSMIX_ATTN_LEFT;
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if (sc->sc_mute[chan][side])
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normal = 0x0;
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else if (sc->sc_flags & ICS_FLIP)
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normal = flip_left[chan];
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else
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normal = 0x01;
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} else {
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ctrl_addr |= ICSMIX_CTRL_RIGHT;
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attn_addr |= ICSMIX_ATTN_RIGHT;
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if (sc->sc_mute[chan][side])
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normal = 0x0;
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else if (sc->sc_flags & ICS_FLIP)
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normal = flip_right[chan];
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else
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normal = 0x02;
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}
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s = splaudio();
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outb(sc->sc_selio, ctrl_addr);
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outb(sc->sc_dataio, normal);
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outb(sc->sc_selio, attn_addr);
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outb(sc->sc_dataio, (unsigned char) value);
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splx(s);
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}
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void
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ics2101_mix_mute(sc, chan, side, domute)
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struct ics2101_softc *sc;
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unsigned int chan, side, domute;
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{
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ics2101_mix_doit(sc, chan, side, 0,
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domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
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}
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void
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ics2101_mix_attenuate(sc, chan, side, value)
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struct ics2101_softc *sc;
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unsigned int chan, side, value;
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{
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ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
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}
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