iokit/Kernel/PMmisc.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <IOKit/pwr_mgt/IOPM.h>
  23 #include <IOKit/IOService.h>
  24
  25 extern "C" {
  26 extern void kprintf(const char *, ...);
  27 }
  28
  29 static char rootDomain[ ] = "IOPMrootDomain";
  30 static char displayDevice[ ] = "IODisplayWrangler";
  31 static bool rootRegistered;
  32 static bool displayRegistered;
  33 static IOService * root;
  34 static IOService * display;
  35
  36 void IOPMLog(const char * who,unsigned long event,unsigned long param1, unsigned long param2)
  37 {
  38 //    kprintf("%s %02d %08x %08x\n",who,event,param1,param2);
  39 }
  40
  41
  42 void IOPMRegisterDevice(const char * who, IOService * theDevice)
  43 {
  44
  45     if ( strcmp(rootDomain,who) == 0 ) {                        // root power domain is registering
  46         theDevice->youAreRoot();
  47         rootRegistered = true;
  48         root = theDevice;
  49         if ( displayRegistered ) {
  50             root->addChild ( display );
  51         }
  52     }
  53     else{
  54         if ( strcmp(displayDevice,who) == 0 ) {                 // somebody else is registering
  55             displayRegistered = true;                           // save pointer to display wrangler
  56             display = theDevice;
  57         }
  58         if ( rootRegistered ) {                                 // if not root domain, then it's
  59             root->addChild ( theDevice );                               // one of its children
  60         }
  61     }
  62 }
  63