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#ifndef _IOKIT_IODMACONTROLLER_H 30#define _IOKIT_IODMACONTROLLER_H 31 32#include <IOKit/IODMACommand.h> 33#include <IOKit/IODMAEventSource.h> 34#include <IOKit/IOService.h> 35 36class IODMAEventSource; 37 38class IODMAController : public IOService 39{ 40 OSDeclareAbstractStructors(IODMAController); 41 42 friend class IODMAEventSource; 43 44 private: 45 IOService *_provider; 46 const OSSymbol *_dmaControllerName; 47 48 protected: 49 virtual void registerDMAController(IOOptionBits options = 0); 50 virtual IOReturn initDMAChannel(IOService *provider, IODMAEventSource *dmaES, UInt32 *dmaIndex, UInt32 reqIndex) = 0; 51 virtual IOReturn startDMACommand(UInt32 dmaIndex, IODMACommand *dmaCommand, IODirection direction, 52 IOByteCount byteCount = 0, IOByteCount byteOffset = 0) = 0; 53 virtual IOReturn stopDMACommand(UInt32 dmaIndex, bool flush = false, mach_timespec_t * timeout = 0) = 0; 54 virtual void completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand); 55 virtual void notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount); 56 virtual IOReturn queryDMACommand(UInt32 dmaIndex, IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle = false) = 0; 57 58 public: 59 static const OSSymbol *createControllerName(UInt32 phandle); 60 static IODMAController *getController(IOService *provider, UInt32 dmaIndex); 61 62 virtual bool start(IOService *provider); 63}; 64 65 66#endif /* _IOKIT_IODMACONTROLLER_H */ 67