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