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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*
26: File: ConfigParse.c
27:
28: Contains: xxx put contents here xxx
29:
30: Version: xxx put version here xxx
31:
32: Copyright: � 1998 by Apple Computer, Inc., all rights reserved.
33:
34: File Ownership:
35:
36: DRI: Craig Keithley
37:
38: Other Contact: xxx put other contact here xxx
39:
40: Technology: xxx put technology here xxx
41:
42: Writers:
43:
44: (BG) Bill Galcher
45: (CJK) Craig Keithley
46:
47: Change History (most recent first):
48:
49: <USB12> 6/29/98 CJK change total length so that it's properly byte swapped
50: <USB11> 6/16/98 CJK change FindHIDInterfaceByProtocol to FindHIDInterfaceByNumber
51: <USB10> 6/8/98 CJK remove unneeded XXGetEndPointDescriptor function
52: <USB9> 5/19/98 BG Fix some casting problems.
53: <USB8> 4/23/98 CJK added FindHIDInterfaceByProtocol, so that the reworked mouse
54: code can find the interface within the configuration descriptor.
55: <USB7> 4/9/98 CJK remove include of USBClassDrivers.h, USBHIDModules.h, and
56: USBDeviceDefines.h
57: <6> 3/17/98 CJK Replace some "};" with just "}" (metrowerks has a problem with
58: it).
59: <5> 3/9/98 CJK Fix RADAR #2216609 (Duplicate sets of enums)
60: <4> 3/2/98 CJK Fix change history (had some old entries from before being
61: cloned).
62: <3> 3/2/98 CJK Correct semi-colon problem.
63: <2> 3/2/98 CJK Add include of USBHIDModules.h. Remove include of HIDEmulation.h
64: */
65:
66: //#include <Types.h>
67: //#include <Devices.h>
68: //#include <processes.h>
69: #include "../driverservices.h"
70: #include "../USB.h"
71:
72:
73: #include "MouseModule.h"
74:
75: OSErr FindHIDInterfaceByNumber(LogicalAddress pConfigDesc, UInt32 ReqInterface, USBInterfaceDescriptorPtr * hInterfaceDesc)
76: {
77: UInt32 totalLength;
78: void * pEndOfDescriptors;
79: USBInterfaceDescriptorPtr pMyIntDesc;
80: USBDescriptorHeaderPtr pCurrentDesc;
81: unsigned long anAddress, anOffset;
82:
83: totalLength = USBToHostWord(((USBConfigurationDescriptorPtr)pConfigDesc)->totalLength);
84: pEndOfDescriptors = (Ptr)pConfigDesc + totalLength; // get the total length and add it to the start of the config space
85: pCurrentDesc = (USBDescriptorHeaderPtr)pConfigDesc; // point the currentdesc to the start of the config space
86:
87: while (pCurrentDesc < pEndOfDescriptors) // as long as we haven't exhausted all the descriptors
88: {
89: if (pCurrentDesc->descriptorType == kUSBInterfaceDesc) // look at the current descriptor
90: {
91: pMyIntDesc = (USBInterfaceDescriptorPtr)pCurrentDesc; // if it's an interface descriptor
92: if ((pMyIntDesc->interfaceClass == kUSBHIDInterfaceClass) &&
93: (pMyIntDesc->interfaceNumber == ReqInterface)) // and if it's the interface we want...
94: {
95: *hInterfaceDesc = pMyIntDesc; // if it is, then return with hInterfaceDesc set to the
96: return noErr; // current descriptor pointer
97: }
98: }
99: // (Ptr)pCurrentDesc += pCurrentDesc->length; // Nope, that either wasn't an interface descriptor
100: anAddress = (unsigned long) pCurrentDesc; // Nope, that either wasn't an interface descriptor
101: anOffset = (unsigned long) pCurrentDesc->length;
102: anAddress += anOffset;
103: pCurrentDesc = (USBDescriptorHeaderPtr) anAddress;
104: if (pCurrentDesc->length == 0)
105: break;
106: } // or it was, but not the droid we're looking for.
107: *hInterfaceDesc = NULL;
108: return kUSBInternalErr;
109: }
110:
111:
112:
113:
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