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%08X", (uint32_t)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 NULL; 54 55 if (dmaParentData->getLength() == sizeof(UInt32)) { 56 dmaParentName = createControllerName(*(UInt32 *)dmaParentData->getBytesNoCopy()); 57 } else { 58 if (dmaIndex >= dmaParentData->getLength() / sizeof(UInt32)) 59 panic("dmaIndex out of range"); 60 dmaParentName = createControllerName(*(UInt32 *)dmaParentData->getBytesNoCopy(dmaIndex * sizeof(UInt32), sizeof(UInt32))); 61 } 62 if (dmaParentName == 0) return NULL; 63 64 // Wait for the parent dma controller 65 dmaController = OSDynamicCast(IODMAController, IOService::waitForService(IOService::nameMatching(dmaParentName))); 66 67 return dmaController; 68} 69 70 71bool IODMAController::start(IOService *provider) 72{ 73 if (!super::start(provider)) return false; 74 75 _provider = provider; 76 77 return true; 78} 79 80 81// protected 82 83void IODMAController::registerDMAController(IOOptionBits options) 84{ 85 OSData *phandleData; 86 87 phandleData = OSDynamicCast(OSData, _provider->getProperty("AAPL,phandle")); 88 89 _dmaControllerName = createControllerName(*(UInt32 *)phandleData->getBytesNoCopy()); 90 91 setName(_dmaControllerName); 92 93 registerService(options | ((options & kIOServiceAsynchronous) ? 0 : kIOServiceSynchronous)); 94} 95 96void IODMAController::completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand) 97{ 98 dmaES->completeDMACommand(dmaCommand); 99} 100 101void IODMAController::notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount, AbsoluteTime timeStamp) 102{ 103 dmaES->notifyDMACommand(dmaCommand, status, actualByteCount, timeStamp); 104} 105 106 107// private 108