iokit/Kernel/PMmisc.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 #include <IOKit/pwr_mgt/IOPM.h>
  31 #include <IOKit/IOService.h>
  32
  33 extern "C" {
  34 extern void kprintf(const char *, ...);
  35 }
  36
  37 static char rootDomain[ ] = "IOPMrootDomain";
  38 static char displayDevice[ ] = "IODisplayWrangler";
  39 static bool rootRegistered;
  40 static bool displayRegistered;
  41 static IOService * root;
  42 static IOService * display;
  43
  44 void IOPMLog(const char * who,unsigned long event,unsigned long param1, unsigned long param2)
  45 {
  46 //    kprintf("%s %02d %08x %08x\n",who,event,param1,param2);
  47 }
  48
  49
  50 void IOPMRegisterDevice(const char * who, IOService * theDevice)
  51 {
  52
  53     if ( strcmp(rootDomain,who) == 0 ) {                        // root power domain is registering
  54         theDevice->youAreRoot();
  55         rootRegistered = true;
  56         root = theDevice;
  57         if ( displayRegistered ) {
  58             root->addChild ( display );
  59         }
  60     }
  61     else{
  62         if ( strcmp(displayDevice,who) == 0 ) {                 // somebody else is registering
  63             displayRegistered = true;                           // save pointer to display wrangler
  64             display = theDevice;
  65         }
  66         if ( rootRegistered ) {                                 // if not root domain, then it's
  67             root->addChild ( theDevice );                               // one of its children
  68         }
  69     }
  70 }
  71