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 29#include <IOKit/IODMAController.h> 30 31 32#define super IOService 33OSDefineMetaClassAndAbstractStructors(IODMAController, IOService); 34 35const OSSymbol *IODMAController::createControllerName(UInt32 phandle) 36{ 37#define CREATE_BUF_LEN 48 38 char buf[CREATE_BUF_LEN]; 39 40 snprintf(buf, CREATE_BUF_LEN, "IODMAController%08lX", phandle); 41 42 return OSSymbol::withCString(buf); 43} 44 45IODMAController *IODMAController::getController(IOService *provider, UInt32 dmaIndex) 46{ 47 OSData *dmaParentData; 48 const OSSymbol *dmaParentName; 49 IODMAController *dmaController; 50 51 // Find the name of the parent dma controller 52 dmaParentData = OSDynamicCast(OSData, provider->getProperty("dma-parent")); 53 if (dmaParentData == 0) return false; 54 dmaParentName = createControllerName(*(UInt32 *)dmaParentData->getBytesNoCopy()); 55 if (dmaParentName == 0) return false; 56 57 // Wait for the parent dma controller 58 dmaController = OSDynamicCast(IODMAController, IOService::waitForService(IOService::nameMatching(dmaParentName))); 59 60 return dmaController; 61} 62 63 64bool IODMAController::start(IOService *provider) 65{ 66 if (!super::start(provider)) return false; 67 68 _provider = provider; 69 70 return true; 71} 72 73 74// protected 75 76void IODMAController::registerDMAController(IOOptionBits options) 77{ 78 OSData *phandleData; 79 80 phandleData = OSDynamicCast(OSData, _provider->getProperty("AAPL,phandle")); 81 82 _dmaControllerName = createControllerName(*(UInt32 *)phandleData->getBytesNoCopy()); 83 84 setName(_dmaControllerName); 85 86 registerService(options | ((options & kIOServiceAsynchronous) ? 0 : kIOServiceSynchronous)); 87} 88 89void IODMAController::completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand) 90{ 91 dmaES->completeDMACommand(dmaCommand); 92} 93 94void IODMAController::notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount) 95{ 96 dmaES->notifyDMACommand(dmaCommand, status, actualByteCount); 97} 98 99 100// private 101