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 37 static u_int power_pm_type = POWER_PM_TYPE_NONE; 38 static power_pm_fn_t power_pm_fn = NULL; 39 static void *power_pm_arg = NULL; 40 static struct task power_pm_task; 41 42 static void 43 power_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 50 int 51 power_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 69 u_int 70 power_pm_get_type(void) 71 { 72 73 return (power_pm_type); 74 } 75 76 void 77 power_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 94 static int power_profile_state = POWER_PROFILE_PERFORMANCE; 95 96 int 97 power_profile_get_state(void) 98 { 99 return (power_profile_state); 100 } 101 102 void 103 power_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