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ConfigDescriptor.c
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1 /*
2 * @brief USB Configuration Descriptor definitions
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * Copyright(C) Dean Camera, 2011, 2012
7 * All rights reserved.
8 *
9 * @par
10 * Software that is described herein is for illustrative purposes only
11 * which provides customers with programming information regarding the
12 * LPC products. This software is supplied "AS IS" without any warranties of
13 * any kind, and NXP Semiconductors and its licensor disclaim any and
14 * all warranties, express or implied, including all implied warranties of
15 * merchantability, fitness for a particular purpose and non-infringement of
16 * intellectual property rights. NXP Semiconductors assumes no responsibility
17 * or liability for the use of the software, conveys no license or rights under any
18 * patent, copyright, mask work right, or any other intellectual property rights in
19 * or to any products. NXP Semiconductors reserves the right to make changes
20 * in the software without notification. NXP Semiconductors also makes no
21 * representation or warranty that such application will be suitable for the
22 * specified use without further testing or modification.
23 *
24 * @par
25 * Permission to use, copy, modify, and distribute this software and its
26 * documentation is hereby granted, under NXP Semiconductors' and its
27 * licensor's relevant copyrights in the software, without fee, provided that it
28 * is used in conjunction with NXP Semiconductors microcontrollers. This
29 * copyright, permission, and disclaimer notice must appear in all copies of
30 * this code.
31 */
32
33 #define __INCLUDE_FROM_USB_DRIVER
34 #include "ConfigDescriptor.h"
35
36 #if defined(USB_CAN_BE_HOST)
37 uint8_t USB_Host_GetDeviceConfigDescriptor(const uint8_t corenum,
38 const uint8_t ConfigNumber,
39 uint16_t* const ConfigSizePtr,
40 void* const BufferPtr,
41 const uint16_t BufferSize)
42 {
43 uint8_t ErrorCode;
44 uint8_t ConfigHeader[sizeof(USB_Descriptor_Configuration_Header_t)];
45 USB_Descriptor_Configuration_Header_t *pCfgHeader = (USB_Descriptor_Configuration_Header_t*)ConfigHeader;
46
47 USB_ControlRequest = (USB_Request_Header_t)
48 {
49 .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
50 .bRequest = REQ_GetDescriptor,
51 .wValue = ((DTYPE_Configuration << 8) | (ConfigNumber - 1)),
52 .wIndex = 0,
53 .wLength = sizeof(USB_Descriptor_Configuration_Header_t),
54 };
55
56 Pipe_SelectPipe(corenum,PIPE_CONTROLPIPE);
57
58 if ((ErrorCode = USB_Host_SendControlRequest(corenum,ConfigHeader)) != HOST_SENDCONTROL_Successful)
59 return ErrorCode;
60
61 *ConfigSizePtr = le16_to_cpu(pCfgHeader->TotalConfigurationSize);
62
63 if (*ConfigSizePtr > BufferSize)
64 return HOST_GETCONFIG_BuffOverflow;
65
66 USB_ControlRequest.wLength = *ConfigSizePtr;
67
68 if ((ErrorCode = USB_Host_SendControlRequest(corenum,BufferPtr)) != HOST_SENDCONTROL_Successful)
69 return ErrorCode;
70
71 if (DESCRIPTOR_TYPE(BufferPtr) != DTYPE_Configuration)
72 return HOST_GETCONFIG_InvalidData;
73
74 return HOST_GETCONFIG_Successful;
75 }
76 #endif
77
78 void USB_GetNextDescriptorOfType(uint16_t* const BytesRem,
79 void** const CurrConfigLoc,
80 const uint8_t Type)
81 {
82 while (*BytesRem)
83 {
84 USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
85
86 if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
87 return;
88 }
89 }
90
91 void USB_GetNextDescriptorOfTypeBefore(uint16_t* const BytesRem,
92 void** const CurrConfigLoc,
93 const uint8_t Type,
94 const uint8_t BeforeType)
95 {
96 while (*BytesRem)
97 {
98 USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
99
100 if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
101 {
102 return;
103 }
104 else if (DESCRIPTOR_TYPE(*CurrConfigLoc) == BeforeType)
105 {
106 *BytesRem = 0;
107 return;
108 }
109 }
110 }
111
112 void USB_GetNextDescriptorOfTypeAfter(uint16_t* const BytesRem,
113 void** const CurrConfigLoc,
114 const uint8_t Type,
115 const uint8_t AfterType)
116 {
117 USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, AfterType);
118
119 if (*BytesRem)
120 USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, Type);
121 }
122
123 uint8_t USB_GetNextDescriptorComp(uint16_t* const BytesRem,
124 void** const CurrConfigLoc,
125 ConfigComparatorPtr_t const ComparatorRoutine)
126 {
127 uint8_t ErrorCode;
128
129 while (*BytesRem)
130 {
131 uint8_t* PrevDescLoc = *CurrConfigLoc;
132 uint16_t PrevBytesRem = *BytesRem;
133
134 USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
135
136 if ((ErrorCode = ComparatorRoutine(*CurrConfigLoc)) != DESCRIPTOR_SEARCH_NotFound)
137 {
138 if (ErrorCode == DESCRIPTOR_SEARCH_Fail)
139 {
140 *CurrConfigLoc = PrevDescLoc;
141 *BytesRem = PrevBytesRem;
142 }
143
144 return ErrorCode;
145 }
146 }
147
148 return DESCRIPTOR_SEARCH_COMP_EndOfDescriptor;
149 }
150