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-rw-r--r--LUFA/Drivers/USB/Class/Common/HIDParser.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Class/Common/HIDParser.c b/LUFA/Drivers/USB/Class/Common/HIDParser.c
new file mode 100644
index 000000000..7b13f1a75
--- /dev/null
+++ b/LUFA/Drivers/USB/Class/Common/HIDParser.c
@@ -0,0 +1,355 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2011.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, 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.
+*/
+
+#define __INCLUDE_FROM_USB_DRIVER
+#define __INCLUDE_FROM_HID_DRIVER
+#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;
+ HID_ReportSizeInfo_t* CurrReportIDInfo = &ParserData->ReportIDSizes[0];
+ uint16_t UsageList[HID_USAGE_STACK_DEPTH];
+ uint8_t UsageListSize = 0;
+ HID_MinMax_t UsageMinMax = {0, 0};
+
+ memset(ParserData, 0x00, sizeof(HID_ReportInfo_t));
+ memset(CurrStateTable, 0x00, sizeof(HID_StateTable_t));
+ memset(CurrReportIDInfo, 0x00, sizeof(HID_ReportSizeInfo_t));
+
+ ParserData->TotalDeviceReports = 1;
+
+ while (ReportSize)
+ {
+ uint8_t HIDReportItem = *ReportData;
+ uint32_t ReportItemData = 0;
+
+ ReportData++;
+ ReportSize--;
+
+ switch (HIDReportItem & HID_RI_DATA_SIZE_MASK)
+ {
+ case HID_RI_DATA_BITS_32:
+ ReportItemData = *((uint32_t*)ReportData);
+ ReportSize -= 4;
+ ReportData += 4;
+ break;
+ case HID_RI_DATA_BITS_16:
+ ReportItemData = *((uint16_t*)ReportData);
+ ReportSize -= 2;
+ ReportData += 2;
+ break;
+ case HID_RI_DATA_BITS_8:
+ ReportItemData = *((uint8_t*)ReportData);
+ ReportSize -= 1;
+ ReportData += 1;
+ break;
+ }
+
+ switch (HIDReportItem & (HID_RI_TYPE_MASK | HID_RI_TAG_MASK))
+ {
+ case HID_RI_PUSH(0):
+ if (CurrStateTable == &StateTable[HID_STATETABLE_STACK_DEPTH - 1])
+ return HID_PARSE_HIDStackOverflow;
+
+ memcpy((CurrStateTable + 1),
+ CurrStateTable,
+ sizeof(HID_ReportItem_t));
+
+ CurrStateTable++;
+ break;
+ case HID_RI_POP(0):
+ if (CurrStateTable == &StateTable[0])
+ return HID_PARSE_HIDStackUnderflow;
+
+ CurrStateTable--;
+ break;
+ case HID_RI_USAGE_PAGE(0):
+ CurrStateTable->Attributes.Usage.Page = ReportItemData;
+ break;
+ case HID_RI_LOGICAL_MINIMUM(0):
+ CurrStateTable->Attributes.Logical.Minimum = ReportItemData;
+ break;
+ case HID_RI_LOGICAL_MAXIMUM(0):
+ CurrStateTable->Attributes.Logical.Maximum = ReportItemData;
+ break;
+ case HID_RI_PHYSICAL_MINIMUM(0):
+ CurrStateTable->Attributes.Physical.Minimum = ReportItemData;
+ break;
+ case HID_RI_PHYSICAL_MAXIMUM(0):
+ CurrStateTable->Attributes.Physical.Maximum = ReportItemData;
+ break;
+ case HID_RI_UNIT_EXPONENT(0):
+ CurrStateTable->Attributes.Unit.Exponent = ReportItemData;
+ break;
+ case HID_RI_UNIT(0):
+ CurrStateTable->Attributes.Unit.Type = ReportItemData;
+ break;
+ case HID_RI_REPORT_SIZE(0):
+ CurrStateTable->Attributes.BitSize = ReportItemData;
+ break;
+ case HID_RI_REPORT_COUNT(0):
+ CurrStateTable->ReportCount = ReportItemData;
+ break;
+ case HID_RI_REPORT_ID(0):
+ CurrStateTable->ReportID = ReportItemData;
+
+ if (ParserData->UsingReportIDs)
+ {
+ CurrReportIDInfo = NULL;
+
+ for (uint8_t i = 0; i < ParserData->TotalDeviceReports; i++)
+ {
+ if (ParserData->ReportIDSizes[i].ReportID == CurrStateTable->ReportID)
+ {
+ CurrReportIDInfo = &ParserData->ReportIDSizes[i];
+ break;
+ }
+ }
+
+ if (CurrReportIDInfo == NULL)
+ {
+ if (ParserData->TotalDeviceReports == HID_MAX_REPORT_IDS)
+ return HID_PARSE_InsufficientReportIDItems;
+
+ CurrReportIDInfo = &ParserData->ReportIDSizes[ParserData->TotalDeviceReports++];
+ memset(CurrReportIDInfo, 0x00, sizeof(HID_ReportSizeInfo_t));
+ }
+ }
+
+ ParserData->UsingReportIDs = true;
+
+ CurrReportIDInfo->ReportID = CurrStateTable->ReportID;
+ break;
+ case HID_RI_USAGE(0):
+ if (UsageListSize == HID_USAGE_STACK_DEPTH)
+ return HID_PARSE_UsageListOverflow;
+
+ UsageList[UsageListSize++] = ReportItemData;
+ break;
+ case HID_RI_USAGE_MINIMUM(0):
+ UsageMinMax.Minimum = ReportItemData;
+ break;
+ case HID_RI_USAGE_MAXIMUM(0):
+ UsageMinMax.Maximum = ReportItemData;
+ break;
+ case HID_RI_COLLECTION(0):
+ 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 (UsageListSize)
+ {
+ CurrCollectionPath->Usage.Usage = UsageList[0];
+
+ for (uint8_t i = 0; i < UsageListSize; i++)
+ UsageList[i] = UsageList[i + 1];
+
+ UsageListSize--;
+ }
+ else if (UsageMinMax.Minimum <= UsageMinMax.Maximum)
+ {
+ CurrCollectionPath->Usage.Usage = UsageMinMax.Minimum++;
+ }
+
+ break;
+ case HID_RI_END_COLLECTION(0):
+ if (CurrCollectionPath == NULL)
+ return HID_PARSE_UnexpectedEndCollection;
+
+ CurrCollectionPath = CurrCollectionPath->Parent;
+ break;
+ case HID_RI_INPUT(0):
+ case HID_RI_OUTPUT(0):
+ case HID_RI_FEATURE(0):
+ 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 (UsageListSize)
+ {
+ NewReportItem.Attributes.Usage.Usage = UsageList[0];
+
+ for (uint8_t i = 0; i < UsageListSize; i++)
+ UsageList[i] = UsageList[i + 1];
+
+ UsageListSize--;
+ }
+ else if (UsageMinMax.Minimum <= UsageMinMax.Maximum)
+ {
+ NewReportItem.Attributes.Usage.Usage = UsageMinMax.Minimum++;
+ }
+
+ uint8_t ItemTypeTag = (HIDReportItem & (HID_RI_TYPE_MASK | HID_RI_TAG_MASK));
+
+ if (ItemTypeTag == HID_RI_INPUT(0))
+ NewReportItem.ItemType = HID_REPORT_ITEM_In;
+ else if (ItemTypeTag == HID_RI_OUTPUT(0))
+ NewReportItem.ItemType = HID_REPORT_ITEM_Out;
+ else
+ NewReportItem.ItemType = HID_REPORT_ITEM_Feature;
+
+ NewReportItem.BitOffset = CurrReportIDInfo->ReportSizeBits[NewReportItem.ItemType];
+
+ CurrReportIDInfo->ReportSizeBits[NewReportItem.ItemType] += CurrStateTable->Attributes.BitSize;
+
+ if (ParserData->LargestReportSizeBits < NewReportItem.BitOffset)
+ ParserData->LargestReportSizeBits = NewReportItem.BitOffset;
+
+ if (!(ReportItemData & HID_IOF_CONSTANT) && CALLBACK_HIDParser_FilterHIDReportItem(&NewReportItem))
+ {
+ if (ParserData->TotalReportItems == HID_MAX_REPORTITEMS)
+ return HID_PARSE_InsufficientReportItems;
+
+ memcpy(&ParserData->ReportItems[ParserData->TotalReportItems],
+ &NewReportItem, sizeof(HID_ReportItem_t));
+
+ ParserData->TotalReportItems++;
+ }
+ }
+
+ break;
+ }
+
+ if ((HIDReportItem & HID_RI_TYPE_MASK) == HID_RI_TYPE_MAIN)
+ {
+ UsageMinMax.Minimum = 0;
+ UsageMinMax.Maximum = 0;
+ UsageListSize = 0;
+ }
+ }
+
+ if (!(ParserData->TotalReportItems))
+ return HID_PARSE_NoUnfilteredReportItems;
+
+ 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);
+
+ if (ReportItem->ReportID)
+ {
+ if (ReportItem->ReportID != ReportData[0])
+ return false;
+
+ ReportData++;
+ }
+
+ ReportItem->PreviousValue = ReportItem->Value;
+ ReportItem->Value = 0;
+
+ while (DataBitsRem--)
+ {
+ if (ReportData[CurrentBit / 8] & (1 << (CurrentBit % 8)))
+ ReportItem->Value |= BitMask;
+
+ CurrentBit++;
+ BitMask <<= 1;
+ }
+
+ return true;
+}
+
+void USB_SetHIDReportItemInfo(uint8_t* ReportData,
+ HID_ReportItem_t* const 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++;
+ }
+
+ ReportItem->PreviousValue = ReportItem->Value;
+
+ while (DataBitsRem--)
+ {
+ if (ReportItem->Value & (1 << (CurrentBit % 8)))
+ ReportData[CurrentBit / 8] |= BitMask;
+
+ CurrentBit++;
+ BitMask <<= 1;
+ }
+}
+
+uint16_t USB_GetHIDReportSize(HID_ReportInfo_t* const ParserData,
+ const uint8_t ReportID,
+ const uint8_t ReportType)
+{
+ for (uint8_t i = 0; i < HID_MAX_REPORT_IDS; i++)
+ {
+ uint16_t ReportSizeBits = ParserData->ReportIDSizes[i].ReportSizeBits[ReportType];
+
+ if (ParserData->ReportIDSizes[i].ReportID == ReportID)
+ return ((ReportSizeBits >> 3) + ((ReportSizeBits & 0x07) ? 1 : 0));
+ }
+
+ return 0;
+}
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