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