1/*-
2 * Copyright (c) 2001 Mitsuru IWASAKI
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#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/proc.h>
33
34#include <sys/power.h>
35#include <sys/taskqueue.h>
36
37static u_int		 power_pm_type	= POWER_PM_TYPE_NONE;
38static power_pm_fn_t	 power_pm_fn	= NULL;
39static void		*power_pm_arg	= NULL;
40static struct task	 power_pm_task;
41
42static void
43power_pm_deferred_fn(void *arg, int pending)
44{
45	int state = (intptr_t)arg;
46
47	power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
48}
49
50int
51power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg)
52{
53	int	error;
54
55	if (power_pm_type == POWER_PM_TYPE_NONE ||
56	    power_pm_type == pm_type) {
57		power_pm_type	= pm_type;
58		power_pm_fn	= pm_fn;
59		power_pm_arg	= pm_arg;
60		error = 0;
61		TASK_INIT(&power_pm_task, 0, power_pm_deferred_fn, NULL);
62	} else {
63		error = ENXIO;
64	}
65
66	return (error);
67}
68
69u_int
70power_pm_get_type(void)
71{
72
73	return (power_pm_type);
74}
75
76void
77power_pm_suspend(int state)
78{
79	if (power_pm_fn == NULL)
80		return;
81
82	if (state != POWER_SLEEP_STATE_STANDBY &&
83	    state != POWER_SLEEP_STATE_SUSPEND &&
84	    state != POWER_SLEEP_STATE_HIBERNATE)
85		return;
86	power_pm_task.ta_context = (void *)(intptr_t)state;
87	taskqueue_enqueue(taskqueue_thread, &power_pm_task);
88}
89
90/*
91 * Power profile.
92 */
93
94static int	power_profile_state = POWER_PROFILE_PERFORMANCE;
95
96int
97power_profile_get_state(void)
98{
99	return (power_profile_state);
100}
101
102void
103power_profile_set_state(int state)
104{
105	int		changed;
106
107	if (state != power_profile_state) {
108		power_profile_state = state;
109		changed = 1;
110		if (bootverbose) {
111			printf("system power profile changed to '%s'\n",
112				(state == POWER_PROFILE_PERFORMANCE) ?
113				"performance" : "economy");
114		}
115	} else {
116		changed = 0;
117	}
118
119	if (changed)
120		EVENTHANDLER_INVOKE(power_profile_change, 0);
121}
122
123