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157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
/*-
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* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Timer device driver for power management events.
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* The code for suspend/resume is derived from APM device driver.
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <machine/clock.h>
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#include <isa/isavar.h>
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static devclass_t pmtimer_devclass;
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/* reject any PnP devices for now */
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static struct isa_pnp_id pmtimer_ids[] = {
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{0}
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};
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static void
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pmtimer_identify(driver_t *driver, device_t parent)
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{
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device_t child;
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/*
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* Only add a child if one doesn't exist already.
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*/
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child = devclass_get_device(pmtimer_devclass, 0);
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if (child == NULL) {
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child = BUS_ADD_CHILD(parent, 0, "pmtimer", 0);
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if (child == NULL)
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panic("pmtimer_identify");
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}
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}
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static int
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pmtimer_probe(device_t dev)
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{
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if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
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return (ENXIO);
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}
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/* only one instance always */
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return (device_get_unit(dev));
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}
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static struct timeval suspend_time;
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static struct timeval diff_time;
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static int
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pmtimer_suspend(device_t dev)
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{
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int pl;
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pl = splsoftclock();
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microtime(&diff_time);
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inittodr(0);
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microtime(&suspend_time);
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timevalsub(&diff_time, &suspend_time);
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splx(pl);
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return (0);
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}
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static int
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pmtimer_resume(device_t dev)
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{
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int pl;
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u_int second, minute, hour;
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struct timeval resume_time, tmp_time;
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/* modified for adjkerntz */
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pl = splsoftclock();
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timer_restore(); /* restore the all timers */
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inittodr(0); /* adjust time to RTC */
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microtime(&resume_time);
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getmicrotime(&tmp_time);
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timevaladd(&tmp_time, &diff_time);
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#ifdef FIXME
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/* XXX THIS DOESN'T WORK!!! */
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time = tmp_time;
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#endif
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#ifdef PMTIMER_FIXUP_CALLTODO
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/* Calculate the delta time suspended */
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timevalsub(&resume_time, &suspend_time);
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/* Fixup the calltodo list with the delta time. */
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adjust_timeout_calltodo(&resume_time);
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#endif /* PMTIMER_FIXUP_CALLTODOK */
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splx(pl);
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#ifndef PMTIMER_FIXUP_CALLTODO
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second = resume_time.tv_sec - suspend_time.tv_sec;
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#else /* PMTIMER_FIXUP_CALLTODO */
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/*
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* We've already calculated resume_time to be the delta between
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* the suspend and the resume.
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*/
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second = resume_time.tv_sec;
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#endif /* PMTIMER_FIXUP_CALLTODO */
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hour = second / 3600;
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second %= 3600;
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minute = second / 60;
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second %= 60;
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log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
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hour, minute, second);
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return (0);
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}
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static device_method_t pmtimer_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, pmtimer_identify),
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DEVMETHOD(device_probe, pmtimer_probe),
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DEVMETHOD(device_attach, bus_generic_attach),
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DEVMETHOD(device_suspend, pmtimer_suspend),
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DEVMETHOD(device_resume, pmtimer_resume),
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{ 0, 0 }
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};
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static driver_t pmtimer_driver = {
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"pmtimer",
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pmtimer_methods,
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1, /* no softc */
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};
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DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);
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