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 |
33 | OSDefineMetaClassAndAbstractStructors(IODMAController, IOService); |
34 | |
35 | const 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 | |
45 | IODMAController *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 | |
71 | bool 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 | |
83 | void 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 | |
96 | void IODMAController::completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand) |
97 | { |
98 | dmaES->completeDMACommand(dmaCommand); |
99 | } |
100 | |
101 | void 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 | |