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142 lines
4.2 KiB
142 lines
4.2 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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#include "ConfigDescriptor.h"
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#if defined(USB_CAN_BE_HOST)
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uint8_t USB_GetDeviceConfigDescriptor(uint16_t* const ConfigSizePtr, void* BufferPtr)
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{
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uint8_t ErrorCode;
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USB_ControlRequest = (USB_Request_Header_t)
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{
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.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
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.bRequest = REQ_GetDescriptor,
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.wValue = (DTYPE_Configuration << 8),
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.wIndex = 0,
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.wLength = sizeof(USB_Descriptor_Configuration_Header_t),
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};
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Pipe_SelectPipe(PIPE_CONTROLPIPE);
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if (BufferPtr == NULL)
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{
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uint8_t ConfigHeader[sizeof(USB_Descriptor_Configuration_Header_t)];
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ErrorCode = USB_Host_SendControlRequest(ConfigHeader);
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#if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
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*ConfigSizePtr = DESCRIPTOR_CAST(ConfigHeader, USB_Descriptor_Configuration_Header_t).TotalConfigurationSize;
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#else
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*ConfigSizePtr = DESCRIPTOR_CAST(ConfigHeader, USB_Descriptor_Configuration_Header_t).wTotalLength;
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#endif
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}
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else
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{
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USB_ControlRequest.wLength = *ConfigSizePtr;
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ErrorCode = USB_Host_SendControlRequest(BufferPtr);
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}
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return ErrorCode;
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}
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#endif
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void USB_GetNextDescriptorOfType(uint16_t* const BytesRem,
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uint8_t** const CurrConfigLoc,
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const uint8_t Type)
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{
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while (*BytesRem)
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{
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USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
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if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
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return;
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}
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}
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void USB_GetNextDescriptorOfTypeBefore(uint16_t* const BytesRem,
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uint8_t** const CurrConfigLoc,
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const uint8_t Type,
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const uint8_t BeforeType)
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{
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while (*BytesRem)
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{
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USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
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if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
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{
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return;
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}
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else if (DESCRIPTOR_TYPE(*CurrConfigLoc) == BeforeType)
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{
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*BytesRem = 0;
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return;
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}
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}
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}
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void USB_GetNextDescriptorOfTypeAfter(uint16_t* const BytesRem,
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uint8_t** const CurrConfigLoc,
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const uint8_t Type,
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const uint8_t AfterType)
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{
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USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, AfterType);
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if (*BytesRem)
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USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, Type);
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}
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uint8_t USB_GetNextDescriptorComp(uint16_t* BytesRem, uint8_t** CurrConfigLoc, ConfigComparatorPtr_t ComparatorRoutine)
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{
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uint8_t ErrorCode;
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while (*BytesRem)
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{
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uint8_t* PrevDescLoc = *CurrConfigLoc;
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uint16_t PrevBytesRem = *BytesRem;
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USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
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if ((ErrorCode = ComparatorRoutine(*CurrConfigLoc)) != DESCRIPTOR_SEARCH_NotFound)
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{
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if (ErrorCode == DESCRIPTOR_SEARCH_Fail)
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{
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*CurrConfigLoc = PrevDescLoc;
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*BytesRem = PrevBytesRem;
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}
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return ErrorCode;
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}
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}
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return DESCRIPTOR_SEARCH_COMP_EndOfDescriptor;
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}
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