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 * $DragonFly: src/sys/kern/subr_power.c,v 1.2 2006/12/23 00:35:04 swildner Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/proc.h> 32 33 #include <sys/power.h> 34 35 static u_int power_pm_type = POWER_PM_TYPE_NONE; 36 static power_pm_fn_t power_pm_fn = NULL; 37 static void *power_pm_arg = NULL; 38 39 int 40 power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg) 41 { 42 int error; 43 44 if (power_pm_type == POWER_PM_TYPE_NONE || 45 power_pm_type == pm_type) { 46 power_pm_type = pm_type; 47 power_pm_fn = pm_fn; 48 power_pm_arg = pm_arg; 49 error = 0; 50 } else { 51 error = ENXIO; 52 } 53 54 return (error); 55 } 56 57 u_int 58 power_pm_get_type(void) 59 { 60 61 return (power_pm_type); 62 } 63 64 void 65 power_pm_suspend(int state) 66 { 67 if (power_pm_fn == NULL) 68 return; 69 70 if (state != POWER_SLEEP_STATE_STANDBY && 71 state != POWER_SLEEP_STATE_SUSPEND && 72 state != POWER_SLEEP_STATE_HIBERNATE) 73 return; 74 75 power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state); 76 } 77 78 /* 79 * Power profile. 80 */ 81 82 static int power_profile_state = POWER_PROFILE_PERFORMANCE; 83 84 int 85 power_profile_get_state(void) 86 { 87 return (power_profile_state); 88 } 89 90 void 91 power_profile_set_state(int state) 92 { 93 int changed; 94 95 if (state != power_profile_state) { 96 power_profile_state = state; 97 changed = 1; 98 kprintf("system power profile changed to '%s'\n", 99 (state == POWER_PROFILE_PERFORMANCE) ? "performance" : "economy"); 100 } else { 101 changed = 0; 102 } 103 104 if (changed) 105 EVENTHANDLER_INVOKE(power_profile_change, 0); 106 } 107 108