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/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
#include "ConfigDescriptor.h"
#if defined(USB_CAN_BE_HOST)
uint8_t USB_Host_GetDeviceConfigDescriptor(uint8_t ConfigNumber, uint16_t* const ConfigSizePtr,
void* BufferPtr, uint16_t BufferSize)
{
uint8_t ErrorCode;
uint8_t ConfigHeader[sizeof(USB_Descriptor_Configuration_Header_t)];
USB_ControlRequest = (USB_Request_Header_t)
{
.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
.bRequest = REQ_GetDescriptor,
.wValue = ((DTYPE_Configuration << 8) | (ConfigNumber - 1)),
.wIndex = 0,
.wLength = sizeof(USB_Descriptor_Configuration_Header_t),
};
Pipe_SelectPipe(PIPE_CONTROLPIPE);
if ((ErrorCode = USB_Host_SendControlRequest(ConfigHeader)) != HOST_SENDCONTROL_Successful)
return ErrorCode;
*ConfigSizePtr = DESCRIPTOR_CAST(ConfigHeader, USB_Descriptor_Configuration_Header_t).TotalConfigurationSize;
if (*ConfigSizePtr > BufferSize)
return HOST_GETCONFIG_BuffOverflow;
USB_ControlRequest.wLength = *ConfigSizePtr;
if ((ErrorCode = USB_Host_SendControlRequest(BufferPtr)) != HOST_SENDCONTROL_Successful)
return ErrorCode;
if (DESCRIPTOR_TYPE(BufferPtr) != DTYPE_Configuration)
return HOST_GETCONFIG_InvalidData;
return HOST_GETCONFIG_Successful;
}
#endif
void USB_GetNextDescriptorOfType(uint16_t* const BytesRem,
void** const CurrConfigLoc,
const uint8_t Type)
{
while (*BytesRem)
{
USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
return;
}
}
void USB_GetNextDescriptorOfTypeBefore(uint16_t* const BytesRem,
void** const CurrConfigLoc,
const uint8_t Type,
const uint8_t BeforeType)
{
while (*BytesRem)
{
USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
{
return;
}
else if (DESCRIPTOR_TYPE(*CurrConfigLoc) == BeforeType)
{
*BytesRem = 0;
return;
}
}
}
void USB_GetNextDescriptorOfTypeAfter(uint16_t* const BytesRem,
void** const CurrConfigLoc,
const uint8_t Type,
const uint8_t AfterType)
{
USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, AfterType);
if (*BytesRem)
USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, Type);
}
uint8_t USB_GetNextDescriptorComp(uint16_t* BytesRem, void** CurrConfigLoc, ConfigComparatorPtr_t ComparatorRoutine)
{
uint8_t ErrorCode;
while (*BytesRem)
{
uint8_t* PrevDescLoc = *CurrConfigLoc;
uint16_t PrevBytesRem = *BytesRem;
USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
if ((ErrorCode = ComparatorRoutine(*CurrConfigLoc)) != DESCRIPTOR_SEARCH_NotFound)
{
if (ErrorCode == DESCRIPTOR_SEARCH_Fail)
{
*CurrConfigLoc = PrevDescLoc;
*BytesRem = PrevBytesRem;
}
return ErrorCode;
}
}
return DESCRIPTOR_SEARCH_COMP_EndOfDescriptor;
}
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