2 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * Timer device driver for power management events.
31 * The code for suspend/resume is derived from APM device driver.
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/syslog.h>
39 #include <machine/clock.h>
41 #include <isa/isavar.h>
43 /* reject any PnP devices for now */
44 static struct isa_pnp_id pmtimer_ids[] = {
49 pmtimer_probe(device_t dev)
52 if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
56 /* only one instance always */
57 return (device_get_unit(dev));
60 static struct timeval suspend_time;
61 static struct timeval diff_time;
64 pmtimer_suspend(device_t dev)
69 microtime(&diff_time);
71 microtime(&suspend_time);
72 timevalsub(&diff_time, &suspend_time);
78 pmtimer_resume(device_t dev)
81 u_int second, minute, hour;
82 struct timeval resume_time, tmp_time;
84 /* modified for adjkerntz */
86 i8254_restore(); /* restore timer_freq and hz */
87 inittodr(0); /* adjust time to RTC */
88 microtime(&resume_time);
89 getmicrotime(&tmp_time);
90 timevaladd(&tmp_time, &diff_time);
93 /* XXX THIS DOESN'T WORK!!! */
97 #ifdef PMTIMER_FIXUP_CALLTODO
98 /* Calculate the delta time suspended */
99 timevalsub(&resume_time, &suspend_time);
100 /* Fixup the calltodo list with the delta time. */
101 adjust_timeout_calltodo(&resume_time);
102 #endif /* PMTIMER_FIXUP_CALLTODOK */
104 #ifndef PMTIMER_FIXUP_CALLTODO
105 second = resume_time.tv_sec - suspend_time.tv_sec;
106 #else /* PMTIMER_FIXUP_CALLTODO */
108 * We've already calculated resume_time to be the delta between
109 * the suspend and the resume.
111 second = resume_time.tv_sec;
112 #endif /* PMTIMER_FIXUP_CALLTODO */
113 hour = second / 3600;
115 minute = second / 60;
117 log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
118 hour, minute, second);
122 static device_method_t pmtimer_methods[] = {
123 /* Device interface */
124 DEVMETHOD(device_probe, pmtimer_probe),
125 DEVMETHOD(device_attach, bus_generic_attach),
126 DEVMETHOD(device_suspend, pmtimer_suspend),
127 DEVMETHOD(device_resume, pmtimer_resume),
131 static driver_t pmtimer_driver = {
137 static devclass_t pmtimer_devclass;
139 DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);