1 /*-
2 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * Timer device driver for power management events.
32 * The code for suspend/resume is derived from APM device driver.
33 */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/syslog.h>
41 #include <machine/clock.h>
42
43 #include <isa/isavar.h>
44
45 static devclass_t pmtimer_devclass;
46
47 /* reject any PnP devices for now */
48 static struct isa_pnp_id pmtimer_ids[] = {
49 {0}
50 };
51
52 static void
pmtimer_identify(driver_t * driver,device_t parent)53 pmtimer_identify(driver_t *driver, device_t parent)
54 {
55 device_t child;
56
57 /*
58 * Only add a child if one doesn't exist already.
59 */
60 child = devclass_get_device(pmtimer_devclass, 0);
61 if (child == NULL) {
62 child = BUS_ADD_CHILD(parent, 0, "pmtimer", 0);
63 if (child == NULL)
64 panic("pmtimer_identify");
65 }
66 }
67
68 static int
pmtimer_probe(device_t dev)69 pmtimer_probe(device_t dev)
70 {
71
72 if (ISA_PNP_PROBE(device_get_parent(dev), dev, pmtimer_ids) == ENXIO)
73 return (ENXIO);
74
75 /* only one instance always */
76 return (device_get_unit(dev));
77 }
78
79 static struct timeval suspend_time;
80 static struct timeval diff_time;
81
82 static int
pmtimer_suspend(device_t dev)83 pmtimer_suspend(device_t dev)
84 {
85
86 microtime(&diff_time);
87 inittodr(0);
88 microtime(&suspend_time);
89 timevalsub(&diff_time, &suspend_time);
90 return (0);
91 }
92
93 static int
pmtimer_resume(device_t dev)94 pmtimer_resume(device_t dev)
95 {
96 u_int second, minute, hour;
97 struct timeval resume_time, tmp_time;
98
99 /* modified for adjkerntz */
100 timer_restore(); /* restore the all timers */
101 inittodr(0); /* adjust time to RTC */
102 microtime(&resume_time);
103 getmicrotime(&tmp_time);
104 timevaladd(&tmp_time, &diff_time);
105
106 #ifdef FIXME
107 /* XXX THIS DOESN'T WORK!!! */
108 time = tmp_time;
109 #endif
110
111 #ifdef PMTIMER_FIXUP_CALLTODO
112 /* Calculate the delta time suspended */
113 timevalsub(&resume_time, &suspend_time);
114 /* Fixup the calltodo list with the delta time. */
115 adjust_timeout_calltodo(&resume_time);
116 /*
117 * We've already calculated resume_time to be the delta between
118 * the suspend and the resume.
119 */
120 second = resume_time.tv_sec;
121 #else /* !PMTIMER_FIXUP_CALLTODO */
122 second = resume_time.tv_sec - suspend_time.tv_sec;
123 #endif /* PMTIMER_FIXUP_CALLTODO */
124 hour = second / 3600;
125 second %= 3600;
126 minute = second / 60;
127 second %= 60;
128 log(LOG_NOTICE, "wakeup from sleeping state (slept %02d:%02d:%02d)\n",
129 hour, minute, second);
130 return (0);
131 }
132
133 static device_method_t pmtimer_methods[] = {
134 /* Device interface */
135 DEVMETHOD(device_identify, pmtimer_identify),
136 DEVMETHOD(device_probe, pmtimer_probe),
137 DEVMETHOD(device_attach, bus_generic_attach),
138 DEVMETHOD(device_suspend, pmtimer_suspend),
139 DEVMETHOD(device_resume, pmtimer_resume),
140 { 0, 0 }
141 };
142
143 static driver_t pmtimer_driver = {
144 "pmtimer",
145 pmtimer_methods,
146 1, /* no softc */
147 };
148
149 DRIVER_MODULE(pmtimer, isa, pmtimer_driver, pmtimer_devclass, 0, 0);
150