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 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 32 #include <sys/power.h> 33 34 static u_int power_pm_type = POWER_PM_TYPE_NONE; 35 static power_pm_fn_t power_pm_fn = NULL; 36 static void *power_pm_arg = NULL; 37 38 int 39 power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg) 40 { 41 int error; 42 43 if (power_pm_type == POWER_PM_TYPE_NONE || 44 power_pm_type == pm_type) { 45 power_pm_type = pm_type; 46 power_pm_fn = pm_fn; 47 power_pm_arg = pm_arg; 48 error = 0; 49 } else { 50 error = ENXIO; 51 } 52 53 return (error); 54 } 55 56 u_int 57 power_pm_get_type(void) 58 { 59 60 return (power_pm_type); 61 } 62 63 void 64 power_pm_suspend(int state) 65 { 66 if (power_pm_fn == NULL) 67 return; 68 69 if (state != POWER_SLEEP_STATE_STANDBY && 70 state != POWER_SLEEP_STATE_SUSPEND && 71 state != POWER_SLEEP_STATE_HIBERNATE) 72 return; 73 74 power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state); 75 } 76 77