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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 "../../HighLevel/USBMode.h"
#if defined(USB_CAN_BE_HOST)
#include "HIDParser.h"
uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID_ReportInfo_t* const ParserData)
{
HID_StateTable_t StateTable[HID_STATETABLE_STACK_DEPTH];
HID_StateTable_t* CurrStateTable = &StateTable[0];
HID_CollectionPath_t* CurrCollectionPath = NULL;
uint16_t UsageStack[HID_USAGE_STACK_DEPTH];
uint8_t UsageStackSize = 0;
uint16_t BitOffsetIn = 0;
uint16_t BitOffsetOut = 0;
uint16_t BitOffsetFeature = 0;
ParserData->TotalReportItems = 0;
ParserData->UsingMultipleReports = false;
for (uint8_t CurrCollection = 0; CurrCollection < HID_MAX_COLLECTIONS; CurrCollection++)
ParserData->CollectionPaths[CurrCollection].Parent = NULL;
memset(&StateTable[0], 0x00, sizeof(HID_StateTable_t));
while (ReportSize)
{
uint8_t HIDReportItem = *ReportData;
uint32_t ReportItemData = 0;
ReportData++;
ReportSize--;
switch (HIDReportItem & DATA_SIZE_MASK)
{
case DATA_SIZE_4:
ReportItemData = *((uint32_t*)ReportData);
ReportSize -= 4;
ReportData += 4;
break;
case DATA_SIZE_2:
ReportItemData = *((uint16_t*)ReportData);
ReportSize -= 2;
ReportData += 2;
break;
case DATA_SIZE_1:
ReportItemData = *((uint8_t*)ReportData);
ReportSize -= 1;
ReportData += 1;
break;
}
switch (HIDReportItem & (TYPE_MASK | TAG_MASK))
{
case (TYPE_GLOBAL | TAG_GLOBAL_PUSH):
if (CurrStateTable == &StateTable[HID_STATETABLE_STACK_DEPTH - 1])
return HID_PARSE_HIDStackOverflow;
memcpy((CurrStateTable + 1),
CurrStateTable,
sizeof(HID_ReportItem_t));
CurrStateTable++;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_POP):
if (CurrStateTable == &StateTable[0])
return HID_PARSE_HIDStackUnderflow;
CurrStateTable--;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_USAGEPAGE):
CurrStateTable->Attributes.Usage.Page = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_LOGICALMIN):
CurrStateTable->Attributes.Logical.Minimum = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_LOGICALMAX):
CurrStateTable->Attributes.Logical.Maximum = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_PHYSMIN):
CurrStateTable->Attributes.Physical.Minimum = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_PHYSMAX):
CurrStateTable->Attributes.Physical.Maximum = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_UNITEXP):
CurrStateTable->Attributes.Unit.Exponent = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_UNIT):
CurrStateTable->Attributes.Unit.Type = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_REPORTSIZE):
CurrStateTable->Attributes.BitSize = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_REPORTCOUNT):
CurrStateTable->ReportCount = ReportItemData;
break;
case (TYPE_GLOBAL | TAG_GLOBAL_REPORTID):
CurrStateTable->ReportID = ReportItemData;
ParserData->UsingMultipleReports = true;
BitOffsetIn = 0;
BitOffsetOut = 0;
BitOffsetFeature = 0;
break;
case (TYPE_LOCAL | TAG_LOCAL_USAGE):
if (UsageStackSize == HID_USAGE_STACK_DEPTH)
return HID_PARSE_UsageStackOverflow;
UsageStack[UsageStackSize++] = ReportItemData;
break;
case (TYPE_LOCAL | TAG_LOCAL_USAGEMIN):
CurrStateTable->Attributes.Usage.MinMax.Minimum = ReportItemData;
break;
case (TYPE_LOCAL | TAG_LOCAL_USAGEMAX):
CurrStateTable->Attributes.Usage.MinMax.Maximum = ReportItemData;
break;
case (TYPE_MAIN | TAG_MAIN_COLLECTION):
if (CurrCollectionPath == NULL)
{
CurrCollectionPath = &ParserData->CollectionPaths[0];
}
else
{
HID_CollectionPath_t* ParentCollectionPath = CurrCollectionPath;
CurrCollectionPath = &ParserData->CollectionPaths[1];
while (CurrCollectionPath->Parent != NULL);
{
if (CurrCollectionPath == &ParserData->CollectionPaths[HID_MAX_COLLECTIONS - 1])
return HID_PARSE_InsufficientCollectionPaths;
CurrCollectionPath++;
}
CurrCollectionPath->Parent = ParentCollectionPath;
}
CurrCollectionPath->Type = ReportItemData;
CurrCollectionPath->Usage.Page = CurrStateTable->Attributes.Usage.Page;
if (UsageStackSize)
{
CurrCollectionPath->Usage.Usage = UsageStack[0];
for (uint8_t i = 0; i < UsageStackSize; i++)
UsageStack[i] = UsageStack[i + 1];
UsageStackSize--;
}
else
{
CurrCollectionPath->Usage.Usage = 0;
}
break;
case (TYPE_MAIN | TAG_MAIN_ENDCOLLECTION):
if (CurrCollectionPath == NULL)
return HID_PARSE_UnexpectedEndCollection;
CurrCollectionPath = CurrCollectionPath->Parent;
break;
case (TYPE_MAIN | TAG_MAIN_INPUT):
case (TYPE_MAIN | TAG_MAIN_OUTPUT):
case (TYPE_MAIN | TAG_MAIN_FEATURE):
for (uint8_t ReportItemNum = 0; ReportItemNum < CurrStateTable->ReportCount; ReportItemNum++)
{
HID_ReportItem_t NewReportItem;
memcpy(&NewReportItem.Attributes,
&CurrStateTable->Attributes,
sizeof(HID_ReportItem_Attributes_t));
NewReportItem.ItemFlags = ReportItemData;
NewReportItem.CollectionPath = CurrCollectionPath;
NewReportItem.ReportID = CurrStateTable->ReportID;
if (UsageStackSize)
{
NewReportItem.Attributes.Usage.Usage = UsageStack[0];
for (uint8_t i = 0; i < UsageStackSize; i++)
UsageStack[i] = UsageStack[i + 1];
UsageStackSize--;
}
else
{
NewReportItem.Attributes.Usage.Usage = 0;
}
switch (HIDReportItem & TAG_MASK)
{
case TAG_MAIN_INPUT:
NewReportItem.ItemType = REPORT_ITEM_TYPE_In;
NewReportItem.BitOffset = BitOffsetIn;
BitOffsetIn += CurrStateTable->Attributes.BitSize;
break;
case TAG_MAIN_OUTPUT:
NewReportItem.ItemType = REPORT_ITEM_TYPE_Out;
NewReportItem.BitOffset = BitOffsetOut;
BitOffsetOut += CurrStateTable->Attributes.BitSize;
break;
case TAG_MAIN_FEATURE:
NewReportItem.ItemType = REPORT_ITEM_TYPE_Feature;
NewReportItem.BitOffset = BitOffsetFeature;
BitOffsetFeature += CurrStateTable->Attributes.BitSize;
break;
}
if (!(ReportItemData & IOF_CONSTANT) && CALLBACK_HIDParser_FilterHIDReportItem(&CurrStateTable->Attributes))
{
if (ParserData->TotalReportItems == HID_MAX_REPORTITEMS)
return HID_PARSE_InsufficientReportItems;
memcpy(&ParserData->ReportItems[ParserData->TotalReportItems],
&NewReportItem, sizeof(HID_ReportItem_t));
ParserData->TotalReportItems++;
}
}
UsageStackSize = 0;
break;
}
if ((HIDReportItem & TYPE_MASK) == TYPE_MAIN)
{
CurrStateTable->Attributes.Usage.MinMax.Minimum = 0;
CurrStateTable->Attributes.Usage.MinMax.Maximum = 0;
UsageStackSize = 0;
}
}
return HID_PARSE_Successful;
}
bool USB_GetHIDReportItemInfo(const uint8_t* ReportData, HID_ReportItem_t* const ReportItem)
{
uint16_t DataBitsRem = ReportItem->Attributes.BitSize;
uint16_t CurrentBit = ReportItem->BitOffset;
uint32_t BitMask = (1 << 0);
ReportItem->Value = 0;
if (ReportItem->ReportID)
{
if (ReportItem->ReportID != ReportData[0])
return false;
ReportData++;
}
while (DataBitsRem--)
{
if (ReportData[CurrentBit / 8] & (1 << (CurrentBit % 8)))
ReportItem->Value |= BitMask;
CurrentBit++;
BitMask <<= 1;
}
return true;
}
void USB_SetHIDReportItemInfo(uint8_t* ReportData, const HID_ReportItem_t* ReportItem)
{
uint16_t DataBitsRem = ReportItem->Attributes.BitSize;
uint16_t CurrentBit = ReportItem->BitOffset;
uint32_t BitMask = (1 << 0);
if (ReportItem->ReportID)
{
ReportData[0] = ReportItem->ReportID;
ReportData++;
}
while (DataBitsRem--)
{
if (ReportItem->Value & (1 << (CurrentBit % 8)))
ReportData[CurrentBit / 8] |= BitMask;
CurrentBit++;
BitMask <<= 1;
}
}
#endif
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