subr_power.c

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    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

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FreeBSD/Linux Kernel Cross Reference sys/kern/subr_power.c

FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_power.c