ebf4319503
libraries it calls (although some might not be doing it right). We are serialized right now by giant as well. This means the splsoftclock are now an anachronism that has no benefit, even marking where locking needs to happen. Remove them.
150 lines
4.0 KiB
C
150 lines
4.0 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/module.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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/* 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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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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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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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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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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/*
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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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#else /* !PMTIMER_FIXUP_CALLTODO */
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second = resume_time.tv_sec - suspend_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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