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
25 * $DragonFly: src/sys/i386/isa/Attic/pmtimer.c,v 1.5 2005/10/28 03:25:57 dillon Exp $
28 #include <sys/cdefs.h>
31 * Timer device driver for power management events.
32 * The code for suspend/resume is derived from APM device driver.
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/syslog.h>
40 #include <sys/thread2.h>
41 #include <machine/clock.h>
43 #include <bus/isa/isavar.h>
45 static devclass_t pmtimer_devclass;
47 /* reject any PnP devices for now */
48 static struct isa_pnp_id pmtimer_ids[] = {
53 pmtimer_probe(device_t dev)
56 if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
60 /* only one instance always */
61 return (device_get_unit(dev));
64 static struct timeval suspend_time;
65 static struct timeval diff_time;
68 pmtimer_suspend(device_t dev)
71 microtime(&diff_time);
73 microtime(&suspend_time);
74 timevalsub(&diff_time, &suspend_time);
80 pmtimer_resume(device_t dev)
82 u_int second, minute, hour;
83 struct timeval resume_time;
85 /* modified for adjkerntz */
87 timer_restore(); /* restore the all timers */
88 inittodr(0); /* adjust time to RTC */
89 microtime(&resume_time);
92 second = resume_time.tv_sec - suspend_time.tv_sec;
97 log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
98 hour, minute, second);
103 * Because pmtimer is a static device that always exists under any attached
104 * isa device, and not scanned by the isa device, we need an identify
105 * function to install the device.
107 static device_method_t pmtimer_methods[] = {
108 /* Device interface */
109 DEVMETHOD(device_identify, bus_generic_identify),
110 DEVMETHOD(device_probe, pmtimer_probe),
111 DEVMETHOD(device_attach, bus_generic_attach),
112 DEVMETHOD(device_suspend, pmtimer_suspend),
113 DEVMETHOD(device_resume, pmtimer_resume),
117 static driver_t pmtimer_driver = {
123 DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);