Remove inclusion of <sys/cdefs.h> from kernel .c files.
[dragonfly.git] / sys / platform / pc64 / isa / pmtimer.c
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1/*-
2 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
3 * Copyright (c) 2008 The DragonFly Project.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
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26 */
27
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28/*
29 * Timer device driver for power management events.
30 * The code for suspend/resume is derived from APM device driver.
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/bus.h>
36#include <sys/kernel.h>
37#include <sys/syslog.h>
38#include <sys/thread2.h>
39#include <machine/clock.h>
40
41#include <bus/isa/isavar.h>
42
43static devclass_t pmtimer_devclass;
44
45/* reject any PnP devices for now */
46static struct isa_pnp_id pmtimer_ids[] = {
47 {0}
48};
49
50static int
51pmtimer_probe(device_t dev)
52{
53
54 if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO) {
55 return (ENXIO);
56 }
57
58 /* only one instance always */
59 return (device_get_unit(dev));
60}
61
62static struct timeval suspend_time;
63static struct timeval diff_time;
64
65static int
66pmtimer_suspend(device_t dev)
67{
68 crit_enter();
69 microtime(&diff_time);
70 inittodr(0);
71 microtime(&suspend_time);
72 timevalsub(&diff_time, &suspend_time);
73 crit_exit();
74 return (0);
75}
76
77static int
78pmtimer_resume(device_t dev)
79{
80 u_int second, minute, hour;
81 struct timeval resume_time;
82
83 /* modified for adjkerntz */
84 crit_enter();
85 timer_restore(); /* restore the all timers */
86 inittodr(0); /* adjust time to RTC */
87 microtime(&resume_time);
88
89 crit_exit();
90 second = resume_time.tv_sec - suspend_time.tv_sec;
91 hour = second / 3600;
92 second %= 3600;
93 minute = second / 60;
94 second %= 60;
95 log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
96 hour, minute, second);
97 return (0);
98}
99
100/*
101 * Because pmtimer is a static device that always exists under any attached
102 * isa device, and not scanned by the isa device, we need an identify
103 * function to install the device.
104 */
105static device_method_t pmtimer_methods[] = {
106 /* Device interface */
107 DEVMETHOD(device_identify, bus_generic_identify),
108 DEVMETHOD(device_probe, pmtimer_probe),
109 DEVMETHOD(device_attach, bus_generic_attach),
110 DEVMETHOD(device_suspend, pmtimer_suspend),
111 DEVMETHOD(device_resume, pmtimer_resume),
112 { 0, 0 }
113};
114
115static driver_t pmtimer_driver = {
116 "pmtimer",
117 pmtimer_methods,
118 1, /* no softc */
119};
120
121DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);