iokit/Kernel/PMmisc.cpp

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