040e3b19e5
attimer(4) is the new body of the part of pcppi(4) that mapped the TIMER1 register to set the pitch of the bell. It was necessary to separate them in order to have a working ACPI attachment (as the two appear as different devices in the ACPI structures).
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/* $NetBSD: attimer.c,v 1.1 2005/03/25 23:06:19 cube Exp $ */
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/*
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* Copyright (c) 2005 The NetBSD Foundation.
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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 Quentin Garnier.
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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 FOUNDATION OR CONTRIBUTORS
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* BE 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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/*
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* AT Timer
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*
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* This code only allows control over the pitch of the speaker (pcppi(4)).
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.1 2005/03/25 23:06:19 cube Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <dev/isa/isareg.h>
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#include <dev/ic/attimervar.h>
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#include <dev/ic/i8253reg.h>
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extern struct cfdriver attimer_cd;
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void
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attimer_attach(struct attimer_softc *sc)
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{
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sc->sc_flags |= ATT_CONFIGURED;
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}
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/*
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* This is slightly artificial. While the code looks fine, I can't help
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* but pray I'll get the attimer object associated to the pcppi object
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* that calls the routine.
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*
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* There's not much at risk here, as there's about no chance to have a
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* computer with more than one pcppi/attimer accessible.
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*/
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struct attimer_softc *
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attimer_attach_speaker()
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{
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int i;
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struct attimer_softc *sc;
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for (i = 0; i < attimer_cd.cd_ndevs; i++)
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if (attimer_cd.cd_devs[i] != NULL) {
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sc = (struct attimer_softc *)attimer_cd.cd_devs[i];
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if ((sc->sc_flags & ATT_CONFIGURED) &&
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!(sc->sc_flags & ATT_ATTACHED)) {
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sc->sc_flags |= ATT_ATTACHED;
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return sc;
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}
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}
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return NULL;
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}
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void
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attimer_set_pitch(struct attimer_softc *sc, int pitch)
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{
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int s;
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s = splhigh();
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
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TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE);
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
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TIMER_DIV(pitch) % 256);
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2,
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TIMER_DIV(pitch) / 256);
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splx(s);
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}
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