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/*-
* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* Timer device driver for power management events.
* The code for suspend/resume is derived from APM device driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <machine/clock.h>
#include <isa/isavar.h>
static devclass_t pmtimer_devclass;
/* reject any PnP devices for now */
static struct isa_pnp_id pmtimer_ids[] = {
{0}
};
static void
pmtimer_identify(driver_t *driver, device_t parent)
{
device_t child;
/*
* Only add a child if one doesn't exist already.
*/
child = devclass_get_device(pmtimer_devclass, 0);
if (child == NULL) {
child = BUS_ADD_CHILD(parent, 0, "pmtimer", 0);
if (child == NULL)
panic("pmtimer_identify");
}
}
static int
pmtimer_probe(device_t dev)
{
if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
return (ENXIO);
}
/* only one instance always */
return (device_get_unit(dev));
}
static struct timeval suspend_time;
static struct timeval diff_time;
static int
pmtimer_suspend(device_t dev)
{
int pl;
pl = splsoftclock();
microtime(&diff_time);
inittodr(0);
microtime(&suspend_time);
timevalsub(&diff_time, &suspend_time);
splx(pl);
return (0);
}
static int
pmtimer_resume(device_t dev)
{
int pl;
u_int second, minute, hour;
struct timeval resume_time, tmp_time;
/* modified for adjkerntz */
pl = splsoftclock();
timer_restore(); /* restore the all timers */
inittodr(0); /* adjust time to RTC */
microtime(&resume_time);
getmicrotime(&tmp_time);
timevaladd(&tmp_time, &diff_time);
#ifdef FIXME
/* XXX THIS DOESN'T WORK!!! */
time = tmp_time;
#endif
#ifdef PMTIMER_FIXUP_CALLTODO
/* Calculate the delta time suspended */
timevalsub(&resume_time, &suspend_time);
/* Fixup the calltodo list with the delta time. */
adjust_timeout_calltodo(&resume_time);
#endif /* PMTIMER_FIXUP_CALLTODOK */
splx(pl);
#ifndef PMTIMER_FIXUP_CALLTODO
second = resume_time.tv_sec - suspend_time.tv_sec;
#else /* PMTIMER_FIXUP_CALLTODO */
/*
* We've already calculated resume_time to be the delta between
* the suspend and the resume.
*/
second = resume_time.tv_sec;
#endif /* PMTIMER_FIXUP_CALLTODO */
hour = second / 3600;
second %= 3600;
minute = second / 60;
second %= 60;
log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
hour, minute, second);
return (0);
}
static device_method_t pmtimer_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, pmtimer_identify),
DEVMETHOD(device_probe, pmtimer_probe),
DEVMETHOD(device_attach, bus_generic_attach),
DEVMETHOD(device_suspend, pmtimer_suspend),
DEVMETHOD(device_resume, pmtimer_resume),
{ 0, 0 }
};
static driver_t pmtimer_driver = {
"pmtimer",
pmtimer_methods,
1, /* no softc */
};
DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);
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