1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Mitsuru IWASAKI
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/proc.h>
35
36#include <sys/power.h>
37#include <sys/taskqueue.h>
38
39static u_int		 power_pm_type	= POWER_PM_TYPE_NONE;
40static power_pm_fn_t	 power_pm_fn	= NULL;
41static void		*power_pm_arg	= NULL;
42static struct task	 power_pm_task;
43
44static void
45power_pm_deferred_fn(void *arg, int pending)
46{
47	int state = (intptr_t)arg;
48
49	power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
50}
51
52int
53power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg)
54{
55	int	error;
56
57	if (power_pm_type == POWER_PM_TYPE_NONE ||
58	    power_pm_type == pm_type) {
59		power_pm_type	= pm_type;
60		power_pm_fn	= pm_fn;
61		power_pm_arg	= pm_arg;
62		error = 0;
63		TASK_INIT(&power_pm_task, 0, power_pm_deferred_fn, NULL);
64	} else {
65		error = ENXIO;
66	}
67
68	return (error);
69}
70
71u_int
72power_pm_get_type(void)
73{
74
75	return (power_pm_type);
76}
77
78void
79power_pm_suspend(int state)
80{
81	if (power_pm_fn == NULL)
82		return;
83
84	if (state != POWER_SLEEP_STATE_STANDBY &&
85	    state != POWER_SLEEP_STATE_SUSPEND &&
86	    state != POWER_SLEEP_STATE_HIBERNATE)
87		return;
88	power_pm_task.ta_context = (void *)(intptr_t)state;
89	taskqueue_enqueue(taskqueue_thread, &power_pm_task);
90}
91
92/*
93 * Power profile.
94 */
95
96static int	power_profile_state = POWER_PROFILE_PERFORMANCE;
97
98int
99power_profile_get_state(void)
100{
101	return (power_profile_state);
102}
103
104void
105power_profile_set_state(int state)
106{
107	int		changed;
108
109	if (state != power_profile_state) {
110		power_profile_state = state;
111		changed = 1;
112		if (bootverbose) {
113			printf("system power profile changed to '%s'\n",
114				(state == POWER_PROFILE_PERFORMANCE) ?
115				"performance" : "economy");
116		}
117	} else {
118		changed = 0;
119	}
120
121	if (changed)
122		EVENTHANDLER_INVOKE(power_profile_change, 0);
123}
124
125