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Annotation of XNU/iokit/Drivers/platform/drvApplePMU/IOPMURTCController.cpp, revision 1.1

1.1     ! root        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: /*
        !            23:  *  1 Dec 1998 suurballe  Created.
        !            24:  */
        !            25: 
        !            26: #include <IOKit/IOSyncer.h>
        !            27: #include "IOPMURTCController.h"
        !            28: #include "pmupriv.h"
        !            29: 
        !            30: //#define super IORTCController
        !            31: //OSDefineMetaClassAndStructors(IOPMURTCController, IORTCController)
        !            32: 
        !            33: #define super IOService
        !            34: OSDefineMetaClassAndStructors(IOPMURTCController, IOService)
        !            35: 
        !            36: 
        !            37: // **********************************************************************************
        !            38: // init
        !            39: //
        !            40: // **********************************************************************************
        !            41: bool IOPMURTCController::init ( OSDictionary * regEntry, ApplePMU * driver )
        !            42: {
        !            43: PMUdriver = driver;
        !            44: 
        !            45: return super::init(regEntry);
        !            46: }
        !            47: 
        !            48: 
        !            49: // **********************************************************************************
        !            50: // tickHandler
        !            51: //
        !            52: // **********************************************************************************
        !            53: void tickHandler ( IOService * us, UInt32, UInt8 * )
        !            54: {
        !            55: ((IOPMURTCController *)us)->clientHandler(((IOPMURTCController *)us)->tickClient);
        !            56: }
        !            57: 
        !            58: 
        !            59: // **********************************************************************************
        !            60: // registerForClockTicks
        !            61: //
        !            62: // The RTC driver is calling to tell us that it is prepared to receive clock
        !            63: // ticks every second.  The parameter block tells who to call when we get one.
        !            64: //
        !            65: // **********************************************************************************
        !            66: void IOPMURTCController::registerForClockTicks ( IOService * client, RTC_tick_handler handler )
        !            67: {
        !            68: clientHandler = handler;
        !            69: tickClient = client;
        !            70: PMUdriver->registerForClockInterrupts ( tickHandler, this );
        !            71: }
        !            72: 
        !            73: 
        !            74: // **********************************************************************************
        !            75: // setRealTimeClock
        !            76: //
        !            77: // The RTC driver is calling to set the real time clock.  We translate this into
        !            78: // a PMU command and enqueue it to our command queue.
        !            79: //
        !            80: // **********************************************************************************
        !            81: IOReturn IOPMURTCController::setRealTimeClock ( UInt8 * newTime )
        !            82: {
        !            83: PMUrequest request;
        !            84: 
        !            85: if ( newTime == NULL ) {
        !            86:         return kPMUParameterError;
        !            87: }
        !            88: 
        !            89: request.sync = IOSyncer::create();
        !            90: request.pmCommand = kPMUtimeWrite;
        !            91: request.pmFlag = false;
        !            92: request.pmSLength1 = 0;
        !            93: request.pmSBuffer2 = newTime;
        !            94: request.pmSLength2 = 4;
        !            95: request.pmRBuffer = NULL;
        !            96: 
        !            97: PMUdriver->enqueueCommand(&request);
        !            98: request.sync->wait();                  // wait till done
        !            99: 
        !           100: return kPMUNoError;
        !           101: }
        !           102: 
        !           103: 
        !           104: // **********************************************************************************
        !           105: // getRealTimeClock
        !           106: //
        !           107: // The RTC driver is calling to read the real time clock.  We translate this into
        !           108: // a PMU command and enqueue it to our command queue.
        !           109: //
        !           110: // The length parameter is ignored on entry.  On exit it is set to the length
        !           111: // in bytes of the time read.
        !           112: // **********************************************************************************
        !           113: IOReturn IOPMURTCController::getRealTimeClock ( UInt8 * currentTime, IOByteCount * length )
        !           114: {
        !           115: PMUrequest  request;
        !           116: 
        !           117: if ( currentTime == NULL ) {
        !           118:         return kPMUParameterError;
        !           119: }
        !           120: 
        !           121: request.sync = IOSyncer::create();
        !           122: request.pmCommand = kPMUtimeRead;
        !           123: request.pmFlag = false;
        !           124: request.pmSLength1 = 0;
        !           125: request.pmSBuffer2 = NULL;
        !           126: request.pmSLength2 = 0;
        !           127: request.pmRBuffer = currentTime;
        !           128: 
        !           129: PMUdriver->enqueueCommand(&request);
        !           130: request.sync->wait();                  // wait till done
        !           131: 
        !           132: *length = request.pmRLength;                           // set caller's length
        !           133:     
        !           134: return kPMUNoError;
        !           135: }
        !           136: 
        !           137: 

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