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pnp.c
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/*++
Copyright (c) 1996 Microsoft Corporation
Module Name:
pnp.c
Abstract:
This module contains the code
for finding, adding, removing, and identifying hid devices.
Environment:
User mode
--*/
#include <basetyps.h>
#include <stdlib.h>
#include <wtypes.h>
#include <setupapi.h>
#include "hidsdi.h"
#include "hid.h"
#include <strsafe.h>
#include <intsafe.h>
#pragma warning(disable:28146) // Warning is meant for kernel mode drivers
static HANDLE SETUPAPUDLLModuleHandle = NULL;
t_SetupDiDestroyDeviceInfoList dll_SetupDiDestroyDeviceInfoList = NULL;
t_SetupDiEnumDeviceInterfaces dll_SetupDiEnumDeviceInterfaces = NULL;
t_SetupDiGetDeviceInterfaceDetailA dll_SetupDiGetDeviceInterfaceDetailA = NULL;
t_SetupDiGetDeviceInterfaceDetailW dll_SetupDiGetDeviceInterfaceDetailW = NULL;
t_SetupDiGetClassDevsA dll_SetupDiGetClassDevsA = NULL;
t_SetupDiGetClassDevsW dll_SetupDiGetClassDevsW = NULL;
static HANDLE HIDDLLModuleHandle = NULL;
t_HidD_GetHidGuid dll_HidD_GetHidGuid = NULL;
t_HidP_SetUsageValue dll_HidP_SetUsageValue = NULL;
t_HidD_GetInputReport dll_HidD_GetInputReport = NULL;
t_HidP_GetCaps dll_HidP_GetCaps = NULL;
t_HidP_GetButtonCaps dll_HidP_GetButtonCaps = NULL;
t_HidP_GetValueCaps dll_HidP_GetValueCaps = NULL;
t_HidP_MaxUsageListLength dll_HidP_MaxUsageListLength = NULL;
t_HidD_GetAttributes dll_HidD_GetAttributes = NULL;
t_HidD_GetPreparsedData dll_HidD_GetPreparsedData = NULL;
t_HidD_FreePreparsedData dll_HidD_FreePreparsedData = NULL;
int LoadHIDLib(void)
{
int ret = 0;
#ifdef UNICODE
SETUPAPUDLLModuleHandle = LoadLibrary(L"SETUPAPI.DLL");
#else
SETUPAPUDLLModuleHandle = LoadLibrary("SETUPAPI.DLL");
#endif // !UNICODE
if (!SETUPAPUDLLModuleHandle) { ret = -1; goto err_exit; }
#ifdef UNICODE
HIDDLLModuleHandle = LoadLibrary(L"HID.DLL");
#else
HIDDLLModuleHandle = LoadLibrary("HID.DLL");
#endif // !UNICODE
if (!HIDDLLModuleHandle) { ret = -2; goto err_exit; }
dll_SetupDiDestroyDeviceInfoList = (t_SetupDiDestroyDeviceInfoList)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiDestroyDeviceInfoList");
if (!dll_SetupDiDestroyDeviceInfoList) { ret = -3; goto err_exit; }
dll_SetupDiEnumDeviceInterfaces = (t_SetupDiEnumDeviceInterfaces)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiEnumDeviceInterfaces");
if (!dll_SetupDiEnumDeviceInterfaces) { ret = -4; goto err_exit; }
dll_SetupDiGetDeviceInterfaceDetailA = (t_SetupDiGetDeviceInterfaceDetailA)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiGetDeviceInterfaceDetailA");
if (!dll_SetupDiGetDeviceInterfaceDetailA) { ret = -5; goto err_exit; }
dll_SetupDiGetDeviceInterfaceDetailW = (t_SetupDiGetDeviceInterfaceDetailW)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiGetDeviceInterfaceDetailW");
if (!dll_SetupDiGetDeviceInterfaceDetailW) { ret = -6; goto err_exit; }
dll_SetupDiGetClassDevsA = (t_SetupDiGetClassDevsA)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiGetClassDevsA");
if (!dll_SetupDiGetClassDevsA) { ret = -7; goto err_exit; }
dll_SetupDiGetClassDevsW = (t_SetupDiGetClassDevsW)GetProcAddress(SETUPAPUDLLModuleHandle, "SetupDiGetClassDevsW");
if (!dll_SetupDiGetClassDevsW) { ret = -8; goto err_exit; }
dll_HidD_GetHidGuid = (t_HidD_GetHidGuid)GetProcAddress(HIDDLLModuleHandle, "HidD_GetHidGuid");
if (!dll_HidD_GetHidGuid) { ret = -9; goto err_exit; }
dll_HidP_SetUsageValue = (t_HidP_SetUsageValue)GetProcAddress(HIDDLLModuleHandle, "HidP_SetUsageValue");
if (!dll_HidP_SetUsageValue) { ret = -10; goto err_exit; }
dll_HidD_GetInputReport = (t_HidD_GetInputReport)GetProcAddress(HIDDLLModuleHandle, "HidD_GetInputReport");
if (!dll_HidD_GetInputReport) { ret = -11; goto err_exit; }
dll_HidP_GetCaps = (t_HidP_GetCaps)GetProcAddress(HIDDLLModuleHandle, "HidP_GetCaps");
if (!dll_HidP_GetCaps) { ret = -12; goto err_exit; }
dll_HidP_GetButtonCaps = (t_HidP_GetButtonCaps)GetProcAddress(HIDDLLModuleHandle, "HidP_GetButtonCaps");
if (!dll_HidP_GetButtonCaps) { ret = -13; goto err_exit; }
dll_HidP_GetValueCaps = (t_HidP_GetValueCaps)GetProcAddress(HIDDLLModuleHandle, "HidP_GetValueCaps");
if (!dll_HidP_GetValueCaps) { ret = -14; goto err_exit; }
dll_HidP_MaxUsageListLength = (t_HidP_MaxUsageListLength)GetProcAddress(HIDDLLModuleHandle, "HidP_MaxUsageListLength");
if (!dll_HidP_MaxUsageListLength) { ret = -15; goto err_exit; }
dll_HidD_GetAttributes = (t_HidD_GetAttributes)GetProcAddress(HIDDLLModuleHandle, "HidD_GetAttributes");
if (!dll_HidD_GetAttributes) { ret = -16; goto err_exit; }
dll_HidD_GetPreparsedData = (t_HidD_GetPreparsedData)GetProcAddress(HIDDLLModuleHandle, "HidD_GetPreparsedData");
if (!dll_HidD_GetPreparsedData) { ret = -17; goto err_exit; }
dll_HidD_FreePreparsedData = (t_HidD_FreePreparsedData)GetProcAddress(HIDDLLModuleHandle, "HidD_FreePreparsedData");
if (!dll_HidD_FreePreparsedData) { ret = -18; goto err_exit; }
return 0;
err_exit:
UnloadHIDLib();
return ret;
}
void UnloadHIDLib(void)
{
if (SETUPAPUDLLModuleHandle) {
FreeLibrary(SETUPAPUDLLModuleHandle);
SETUPAPUDLLModuleHandle = NULL;
}
if (HIDDLLModuleHandle) {
FreeLibrary(HIDDLLModuleHandle);
HIDDLLModuleHandle = NULL;
}
}
BOOLEAN
FindKnownHidDevices (
OUT PHID_DEVICE * HidDevices, // A array of struct _HID_DEVICE
OUT PULONG NumberDevices // the length of this array.
)
/*++
Routine Description:
Do the required PnP things in order to find all the HID devices in
the system at this time.
--*/
{
HDEVINFO hardwareDeviceInfo = INVALID_HANDLE_VALUE;
SP_DEVICE_INTERFACE_DATA deviceInfoData;
ULONG i;
BOOLEAN done = FALSE;
PHID_DEVICE hidDeviceInst;
GUID hidGuid;
PSP_DEVICE_INTERFACE_DETAIL_DATA functionClassDeviceData = NULL;
ULONG predictedLength = 0;
ULONG requiredLength = 0;
PHID_DEVICE newHidDevices;
dll_HidD_GetHidGuid (&hidGuid);
*HidDevices = NULL;
*NumberDevices = 0;
//
// Open a handle to the plug and play dev node.
//
hardwareDeviceInfo = dll_SetupDiGetClassDevs ( &hidGuid,
NULL, // Define no enumerator (global)
NULL, // Define no
(DIGCF_PRESENT | // Only Devices present
DIGCF_DEVICEINTERFACE)); // Function class devices.
if (INVALID_HANDLE_VALUE == hardwareDeviceInfo)
{
goto Done;
}
//
// Take a wild guess to start
//
*NumberDevices = 4;
done = FALSE;
deviceInfoData.cbSize = sizeof (SP_DEVICE_INTERFACE_DATA);
i=0;
while (!done)
{
*NumberDevices *= 2;
if (*HidDevices)
{
newHidDevices =
realloc (*HidDevices, (*NumberDevices * sizeof (HID_DEVICE)));
if (NULL == newHidDevices)
{
free(*HidDevices);
}
*HidDevices = newHidDevices;
}
else
{
*HidDevices = calloc (*NumberDevices, sizeof (HID_DEVICE));
}
if (NULL == *HidDevices)
{
goto Done;
}
hidDeviceInst = *HidDevices + i;
for (; i < *NumberDevices; i++, hidDeviceInst++)
{
//
// Initialize an empty HID_DEVICE
//
RtlZeroMemory(hidDeviceInst,sizeof(HID_DEVICE));
hidDeviceInst -> HidDevice = INVALID_HANDLE_VALUE;
if (dll_SetupDiEnumDeviceInterfaces (hardwareDeviceInfo,
0, // No care about specific PDOs
&hidGuid,
i,
&deviceInfoData))
{
//
// allocate a function class device data structure to receive the
// goods about this particular device.
//
dll_SetupDiGetDeviceInterfaceDetail (
hardwareDeviceInfo,
&deviceInfoData,
NULL, // probing so no output buffer yet
0, // probing so output buffer length of zero
&requiredLength,
NULL); // not interested in the specific dev-node
predictedLength = requiredLength;
functionClassDeviceData = malloc (predictedLength);
if (functionClassDeviceData)
{
functionClassDeviceData->cbSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA);
ZeroMemory(functionClassDeviceData->DevicePath, sizeof(functionClassDeviceData->DevicePath));
}
else
{
goto Done;
}
//
// Retrieve the information from Plug and Play.
//
if (dll_SetupDiGetDeviceInterfaceDetail (
hardwareDeviceInfo,
&deviceInfoData,
functionClassDeviceData,
predictedLength,
&requiredLength,
NULL))
{
//
// Open device with just generic query abilities to begin with
//
if (! OpenHidDevice (functionClassDeviceData -> DevicePath,
FALSE, // ReadAccess - none
FALSE, // WriteAccess - none
FALSE, // Overlapped - no
FALSE, // Exclusive - no
hidDeviceInst))
{
//
// Save the device path so it can be still listed.
//
INT iDevicePathSize;
iDevicePathSize = ((INT)_tcslen(functionClassDeviceData -> DevicePath) + 1) * sizeof(TCHAR);
hidDeviceInst -> DevicePath = malloc(iDevicePathSize);
if (NULL != hidDeviceInst -> DevicePath)
{
StringCbCopy(hidDeviceInst -> DevicePath, iDevicePathSize, functionClassDeviceData -> DevicePath);
}
}
}
free(functionClassDeviceData);
functionClassDeviceData = NULL;
}
else
{
if (ERROR_NO_MORE_ITEMS == GetLastError())
{
done = TRUE;
break;
}
}
}
}
*NumberDevices = i;
Done:
if (FALSE == done)
{
if (NULL != *HidDevices)
{
free(*HidDevices);
*HidDevices = NULL;
}
}
if (INVALID_HANDLE_VALUE != hardwareDeviceInfo)
{
dll_SetupDiDestroyDeviceInfoList (hardwareDeviceInfo);
hardwareDeviceInfo = INVALID_HANDLE_VALUE;
}
return done;
}
BOOLEAN
OpenHidDevice (
_In_ LPTSTR DevicePath,
_In_ BOOL HasReadAccess,
_In_ BOOL HasWriteAccess,
_In_ BOOL IsOverlapped,
_In_ BOOL IsExclusive,
_Out_ PHID_DEVICE HidDevice
)
/*++
RoutineDescription:
Given the HardwareDeviceInfo, representing a handle to the plug and
play information, and deviceInfoData, representing a specific hid device,
open that device and fill in all the relivant information in the given
HID_DEVICE structure.
return if the open and initialization was successfull or not.
--*/
{
DWORD accessFlags = 0;
DWORD sharingFlags = 0;
BOOLEAN bRet = FALSE;
INT iDevicePathSize;
RtlZeroMemory(HidDevice,sizeof(HID_DEVICE));
HidDevice -> HidDevice = INVALID_HANDLE_VALUE;
if (NULL == DevicePath)
{
goto Done;
}
iDevicePathSize = ((INT)_tcslen(DevicePath)+1) * sizeof(TCHAR);
HidDevice -> DevicePath = malloc(iDevicePathSize);
if (NULL == HidDevice -> DevicePath)
{
goto Done;
}
StringCbCopy(HidDevice -> DevicePath, iDevicePathSize, DevicePath);
if (HasReadAccess)
{
accessFlags |= GENERIC_READ;
}
if (HasWriteAccess)
{
accessFlags |= GENERIC_WRITE;
}
if (!IsExclusive)
{
sharingFlags = FILE_SHARE_READ | FILE_SHARE_WRITE;
}
//
// The hid.dll api's do not pass the overlapped structure into deviceiocontrol
// so to use them we must have a non overlapped device. If the request is for
// an overlapped device we will close the device below and get a handle to an
// overlapped device
//
HidDevice->HidDevice = CreateFile (DevicePath,
accessFlags,
sharingFlags,
NULL, // no SECURITY_ATTRIBUTES structure
OPEN_EXISTING, // No special create flags
0, // Open device as non-overlapped so we can get data
NULL); // No template file
if (INVALID_HANDLE_VALUE == HidDevice->HidDevice)
{
goto Done;
}
HidDevice -> OpenedForRead = HasReadAccess;
HidDevice -> OpenedForWrite = HasWriteAccess;
HidDevice -> OpenedOverlapped = IsOverlapped;
HidDevice -> OpenedExclusive = IsExclusive;
//
// If the device was not opened as overlapped, then fill in the rest of the
// HidDevice structure. However, if opened as overlapped, this handle cannot
// be used in the calls to the HidD_ exported functions since each of these
// functions does synchronous I/O.
//
if (!dll_HidD_GetPreparsedData (HidDevice->HidDevice, &HidDevice->Ppd))
{
goto Done;
}
if (!dll_HidD_GetAttributes (HidDevice->HidDevice, &HidDevice->Attributes))
{
goto Done;
}
if (!dll_HidP_GetCaps (HidDevice->Ppd, &HidDevice->Caps))
{
goto Done;
}
//
// At this point the client has a choice. It may chose to look at the
// Usage and Page of the top level collection found in the HIDP_CAPS
// structure. In this way it could just use the usages it knows about.
// If either HidP_GetUsages or HidP_GetUsageValue return an error then
// that particular usage does not exist in the report.
// This is most likely the preferred method as the application can only
// use usages of which it already knows.
// In this case the app need not even call GetButtonCaps or GetValueCaps.
//
// In this example, however, we will call FillDeviceInfo to look for all
// of the usages in the device.
//
if (FALSE == FillDeviceInfo(HidDevice))
{
goto Done;
}
if (IsOverlapped)
{
CloseHandle(HidDevice->HidDevice);
HidDevice->HidDevice = INVALID_HANDLE_VALUE;
HidDevice->HidDevice = CreateFile (DevicePath,
accessFlags,
sharingFlags,
NULL, // no SECURITY_ATTRIBUTES structure
OPEN_EXISTING, // No special create flags
FILE_FLAG_OVERLAPPED, // Now we open the device as overlapped
NULL); // No template file
if (INVALID_HANDLE_VALUE == HidDevice->HidDevice)
{
goto Done;
}
}
bRet = TRUE;
Done:
if (!bRet)
{
CloseHidDevice(HidDevice);
}
return (bRet);
}
BOOLEAN
FillDeviceInfo(
IN PHID_DEVICE HidDevice
)
{
ULONG numValues;
USHORT numCaps;
PHIDP_BUTTON_CAPS buttonCaps;
PHIDP_VALUE_CAPS valueCaps;
PHID_DATA data;
ULONG i;
USAGE usage;
UINT dataIdx;
ULONG newFeatureDataLength;
ULONG tmpSum;
BOOLEAN bRet = FALSE;
//
// setup Input Data buffers.
//
//
// Allocate memory to hold on input report
//
HidDevice->InputReportBuffer = (PCHAR)
calloc (HidDevice->Caps.InputReportByteLength?HidDevice->Caps.InputReportByteLength:1, sizeof (CHAR));
//
// Allocate memory to hold the button and value capabilities.
// NumberXXCaps is in terms of array elements.
//
HidDevice->InputButtonCaps = buttonCaps = (PHIDP_BUTTON_CAPS)
calloc (HidDevice->Caps.NumberInputButtonCaps?HidDevice->Caps.NumberInputButtonCaps:1, sizeof (HIDP_BUTTON_CAPS));
if (NULL == buttonCaps)
{
goto Done;
}
HidDevice->InputValueCaps = valueCaps = (PHIDP_VALUE_CAPS)
calloc (HidDevice->Caps.NumberInputValueCaps?HidDevice->Caps.NumberInputValueCaps:1, sizeof (HIDP_VALUE_CAPS));
if (NULL == valueCaps)
{
goto Done;
}
//
// Have the HidP_X functions fill in the capability structure arrays.
//
numCaps = HidDevice->Caps.NumberInputButtonCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetButtonCaps (HidP_Input,
buttonCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
numCaps = HidDevice->Caps.NumberInputValueCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetValueCaps (HidP_Input,
valueCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
//
// Depending on the device, some value caps structures may represent more
// than one value. (A range). In the interest of being verbose, over
// efficient, we will expand these so that we have one and only one
// struct _HID_DATA for each value.
//
// To do this we need to count up the total number of values are listed
// in the value caps structure. For each element in the array we test
// for range if it is a range then UsageMax and UsageMin describe the
// usages for this range INCLUSIVE.
//
numValues = 0;
for (i = 0; i < (ULONG)HidDevice->Caps.NumberInputValueCaps; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
numValues += valueCaps->Range.UsageMax - valueCaps->Range.UsageMin + 1;
if(valueCaps->Range.UsageMin > valueCaps->Range.UsageMax)
{
goto Done; // overrun check
}
}
else
{
numValues++;
}
}
valueCaps = HidDevice->InputValueCaps;
//
// Allocate a buffer to hold the struct _HID_DATA structures.
// One element for each set of buttons, and one element for each value
// found.
//
HidDevice->InputDataLength = HidDevice->Caps.NumberInputButtonCaps
+ numValues;
HidDevice->InputData = data = (PHID_DATA)
calloc (HidDevice->InputDataLength? HidDevice->InputDataLength:1, sizeof (HID_DATA));
if (NULL == data)
{
goto Done;
}
//
// Fill in the button data
//
dataIdx = 0;
for (i = 0;
i < (ULONG)HidDevice->Caps.NumberInputButtonCaps;
i++, data++, buttonCaps++, dataIdx++)
{
data->IsButtonData = TRUE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = buttonCaps->UsagePage;
if (buttonCaps->IsRange)
{
data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
}
else
{
data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
}
data->ButtonData.MaxUsageLength = dll_HidP_MaxUsageListLength (
HidP_Input,
buttonCaps->UsagePage,
HidDevice->Ppd);
data->ButtonData.Usages = (PUSAGE)
calloc (data->ButtonData.MaxUsageLength? data->ButtonData.MaxUsageLength:1, sizeof (USAGE));
data->ReportID = buttonCaps -> ReportID;
}
//
// Fill in the value data
//
for (i = 0; i < (ULONG)HidDevice->Caps.NumberInputValueCaps ; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
for (usage = valueCaps->Range.UsageMin;
usage <= valueCaps->Range.UsageMax;
usage++)
{
if(dataIdx >= (HidDevice->InputDataLength))
{
goto Done; // error case
}
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = usage;
data->ReportID = valueCaps -> ReportID;
data++;
dataIdx++;
}
}
else
{
if(dataIdx >= (HidDevice->InputDataLength))
{
goto Done; // error case
}
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = valueCaps->NotRange.Usage;
data->ReportID = valueCaps -> ReportID;
data++;
dataIdx++;
}
}
//
// setup Output Data buffers.
//
HidDevice->OutputReportBuffer = (PCHAR)
calloc (HidDevice->Caps.OutputReportByteLength? HidDevice->Caps.OutputReportByteLength:1, sizeof (CHAR));
HidDevice->OutputButtonCaps = buttonCaps = (PHIDP_BUTTON_CAPS)
calloc (HidDevice->Caps.NumberOutputButtonCaps? HidDevice->Caps.NumberOutputButtonCaps:1, sizeof (HIDP_BUTTON_CAPS));
if (NULL == buttonCaps)
{
goto Done;
}
HidDevice->OutputValueCaps = valueCaps = (PHIDP_VALUE_CAPS)
calloc (HidDevice->Caps.NumberOutputValueCaps? HidDevice->Caps.NumberOutputValueCaps:1, sizeof (HIDP_VALUE_CAPS));
if (NULL == valueCaps)
{
goto Done;
}
numCaps = HidDevice->Caps.NumberOutputButtonCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetButtonCaps (HidP_Output,
buttonCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
numCaps = HidDevice->Caps.NumberOutputValueCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetValueCaps (HidP_Output,
valueCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
numValues = 0;
for (i = 0; i < (ULONG)HidDevice->Caps.NumberOutputValueCaps; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
numValues += valueCaps->Range.UsageMax
- valueCaps->Range.UsageMin + 1;
}
else
{
numValues++;
}
}
valueCaps = HidDevice->OutputValueCaps;
HidDevice->OutputDataLength = HidDevice->Caps.NumberOutputButtonCaps
+ numValues;
HidDevice->OutputData = data = (PHID_DATA)
calloc (HidDevice->OutputDataLength? HidDevice->OutputDataLength:1, sizeof (HID_DATA));
if (NULL == data)
{
goto Done;
}
for (i = 0;
i < (ULONG)HidDevice->Caps.NumberOutputButtonCaps;
i++, data++, buttonCaps++)
{
if (i >= HidDevice->OutputDataLength)
{
goto Done;
}
if(FAILED(ULongAdd((HidDevice->Caps).NumberOutputButtonCaps ,
(valueCaps->Range).UsageMax, &tmpSum)))
{
goto Done;
}
if((ULONG)((valueCaps->Range).UsageMin) == tmpSum)
{
goto Done;
}
data->IsButtonData = TRUE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = buttonCaps->UsagePage;
if (buttonCaps->IsRange)
{
data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
}
else
{
data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
}
data->ButtonData.MaxUsageLength = dll_HidP_MaxUsageListLength (
HidP_Output,
buttonCaps->UsagePage,
HidDevice->Ppd);
data->ButtonData.Usages = (PUSAGE)
calloc (data->ButtonData.MaxUsageLength, sizeof (USAGE));
data->ReportID = buttonCaps -> ReportID;
}
for (i = 0; i < (ULONG)HidDevice->Caps.NumberOutputValueCaps ; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
for (usage = valueCaps->Range.UsageMin;
usage <= valueCaps->Range.UsageMax;
usage++)
{
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = usage;
data->ReportID = valueCaps -> ReportID;
data++;
}
}
else
{
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = valueCaps->NotRange.Usage;
data->ReportID = valueCaps -> ReportID;
data++;
}
}
//
// setup Feature Data buffers.
//
HidDevice->FeatureReportBuffer = (PCHAR)
calloc (HidDevice->Caps.FeatureReportByteLength? HidDevice->Caps.FeatureReportByteLength:1, sizeof (CHAR));
HidDevice->FeatureButtonCaps = buttonCaps = (PHIDP_BUTTON_CAPS)
calloc (HidDevice->Caps.NumberFeatureButtonCaps? HidDevice->Caps.NumberFeatureButtonCaps:1, sizeof (HIDP_BUTTON_CAPS));
if (NULL == buttonCaps)
{
goto Done;
}
HidDevice->FeatureValueCaps = valueCaps = (PHIDP_VALUE_CAPS)
calloc (HidDevice->Caps.NumberFeatureValueCaps? HidDevice->Caps.NumberFeatureValueCaps:1, sizeof (HIDP_VALUE_CAPS));
if (NULL == valueCaps)
{
goto Done;
}
numCaps = HidDevice->Caps.NumberFeatureButtonCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetButtonCaps (HidP_Feature,
buttonCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
numCaps = HidDevice->Caps.NumberFeatureValueCaps;
if(numCaps > 0)
{
if(HIDP_STATUS_SUCCESS != (dll_HidP_GetValueCaps (HidP_Feature,
valueCaps,
&numCaps,
HidDevice->Ppd)))
{
goto Done;
}
}
numValues = 0;
for (i = 0; i < (ULONG)HidDevice->Caps.NumberFeatureValueCaps; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
numValues += valueCaps->Range.UsageMax
- valueCaps->Range.UsageMin + 1;
}
else
{
numValues++;
}
}
valueCaps = HidDevice->FeatureValueCaps;
if(FAILED(ULongAdd(HidDevice->Caps.NumberFeatureButtonCaps,
numValues, &newFeatureDataLength)))
{
goto Done;
}
HidDevice->FeatureDataLength = newFeatureDataLength;
HidDevice->FeatureData = data = (PHID_DATA)
calloc (HidDevice->FeatureDataLength? HidDevice->FeatureDataLength:1, sizeof (HID_DATA));
if (NULL == data)
{
goto Done;
}
dataIdx = 0;
for (i = 0;
i < (ULONG)HidDevice->Caps.NumberFeatureButtonCaps;
i++, data++, buttonCaps++, dataIdx++)
{
data->IsButtonData = TRUE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = buttonCaps->UsagePage;
if (buttonCaps->IsRange)
{
data->ButtonData.UsageMin = buttonCaps -> Range.UsageMin;
data->ButtonData.UsageMax = buttonCaps -> Range.UsageMax;
}
else
{
data -> ButtonData.UsageMin = data -> ButtonData.UsageMax = buttonCaps -> NotRange.Usage;
}
data->ButtonData.MaxUsageLength = dll_HidP_MaxUsageListLength (
HidP_Feature,
buttonCaps->UsagePage,
HidDevice->Ppd);
data->ButtonData.Usages = (PUSAGE)
calloc (data->ButtonData.MaxUsageLength? data->ButtonData.MaxUsageLength:1, sizeof (USAGE));
data->ReportID = buttonCaps -> ReportID;
}
for (i = 0; i < (ULONG)HidDevice->Caps.NumberFeatureValueCaps ; i++, valueCaps++)
{
if (valueCaps->IsRange)
{
for (usage = valueCaps->Range.UsageMin;
usage <= valueCaps->Range.UsageMax;
usage++)
{
if(dataIdx >= (HidDevice->FeatureDataLength))
{
goto Done; // error case
}
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = usage;
data->ReportID = valueCaps -> ReportID;
data++;
dataIdx++;
}
}
else
{
if(dataIdx >= (HidDevice->FeatureDataLength))
{
goto Done; // error case
}
data->IsButtonData = FALSE;
data->Status = HIDP_STATUS_SUCCESS;
data->UsagePage = valueCaps->UsagePage;
data->ValueData.Usage = valueCaps->NotRange.Usage;
data->ReportID = valueCaps -> ReportID;
data++;
dataIdx++;
}
}
bRet = TRUE;
Done:
//
// We leave the resource clean-up to the caller.
//
return (bRet);
}
VOID
CloseHidDevices(
IN PHID_DEVICE HidDevices,
IN ULONG NumberDevices
)
{
ULONG Index;
for (Index = 0; Index < NumberDevices; Index++)
{
CloseHidDevice(HidDevices+Index);
}
return;
}
VOID
CloseHidDevice (
IN PHID_DEVICE HidDevice
)
{
if (NULL != HidDevice -> DevicePath)
{
free(HidDevice -> DevicePath);
HidDevice -> DevicePath = NULL;
}
if (INVALID_HANDLE_VALUE != HidDevice -> HidDevice)
{
CloseHandle(HidDevice -> HidDevice);
HidDevice -> HidDevice = INVALID_HANDLE_VALUE;
}