NTSTATUS Hid::SetUsages(REPORT_TYPE ReportType, USAGE UsagePage, USHORT LinkCollection, USAGE *UsageList, ULONG *UsageLength, void *PreparsedData, void *Report, ULONG ReportLength)
{
return HidP_SetUsages(ReportType, UsagePage, LinkCollection, UsageList, UsageLength, PreparsedData, Report, ReportLength);
}
NTSTATUS
FireflySetFeature(
IN PDEVICE_CONTEXT DeviceContext,
IN UCHAR PageId,
IN USHORT FeatureId,
IN BOOLEAN EnableFeature
)
/*++
Routine Description:
This routine sets the HID feature by sending HID ioctls to our device.
These IOCTLs will be handled by HIDUSB and converted into USB requests
and send to the device.
Arguments:
DeviceContext - Context for our device
PageID - UsagePage of the light control feature.
FeatureId - Usage ID of the feature.
EnanbleFeature - True to turn the light on, Falst to turn if off.
Return Value:
NT Status code
--*/
{
WDF_MEMORY_DESCRIPTOR inputDescriptor, outputDescriptor;
NTSTATUS status;
HID_COLLECTION_INFORMATION collectionInformation = {0};
PHIDP_PREPARSED_DATA preparsedData;
HIDP_CAPS caps;
USAGE usage;
ULONG usageLength;
PCHAR report;
WDFIOTARGET hidTarget;
WDF_IO_TARGET_OPEN_PARAMS openParams;
PAGED_CODE();
//
// Preinit for error.
//
preparsedData = NULL;
report = NULL;
hidTarget = NULL;
status = WdfIoTargetCreate(WdfObjectContextGetObject(DeviceContext),
WDF_NO_OBJECT_ATTRIBUTES,
&hidTarget);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: WdfIoTargetCreate failed 0x%x\n", status));
return status;
}
//
// Open it up, write access only!
//
WDF_IO_TARGET_OPEN_PARAMS_INIT_OPEN_BY_NAME(
&openParams,
&DeviceContext->PdoName,
FILE_WRITE_ACCESS);
//
// We will let the framework to respond automatically to the pnp
// state changes of the target by closing and opening the handle.
//
openParams.ShareAccess = FILE_SHARE_WRITE | FILE_SHARE_READ;
status = WdfIoTargetOpen(hidTarget, &openParams);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: WdfIoTargetOpen failed 0x%x\n", status));
goto ExitAndFree;
}
WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&outputDescriptor,
(PVOID) &collectionInformation,
sizeof(HID_COLLECTION_INFORMATION));
//
// Now get the collection information for this device
//
status = WdfIoTargetSendIoctlSynchronously(hidTarget,
NULL,
IOCTL_HID_GET_COLLECTION_INFORMATION,
NULL,
&outputDescriptor,
NULL,
NULL);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: WdfIoTargetSendIoctlSynchronously failed 0x%x\n", status));
goto ExitAndFree;
}
preparsedData = (PHIDP_PREPARSED_DATA) ExAllocatePoolWithTag(
NonPagedPool, collectionInformation.DescriptorSize, 'ffly');
if (preparsedData == NULL) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto ExitAndFree;
}
WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&outputDescriptor,
(PVOID) preparsedData,
collectionInformation.DescriptorSize);
status = WdfIoTargetSendIoctlSynchronously(hidTarget,
NULL,
IOCTL_HID_GET_COLLECTION_DESCRIPTOR,
NULL,
&outputDescriptor,
NULL,
NULL);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: WdfIoTargetSendIoctlSynchronously failed 0x%x\n", status));
goto ExitAndFree;
}
//
// Now get the capabilities.
//
RtlZeroMemory(&caps, sizeof(HIDP_CAPS));
status = HidP_GetCaps(preparsedData, &caps);
if (!NT_SUCCESS(status)) {
goto ExitAndFree;
}
//
// Create a report to send to the device.
//
report = (PCHAR) ExAllocatePoolWithTag(
NonPagedPool, caps.FeatureReportByteLength, 'ffly');
if (report == NULL) {
goto ExitAndFree;
}
//
// Start with a zeroed report. If we are disabling the feature, this might
// be all we need to do.
//
RtlZeroMemory(report, caps.FeatureReportByteLength);
status = STATUS_SUCCESS;
if (EnableFeature) {
//
// Edit the report to reflect the enabled feature
//
usage = FeatureId;
usageLength = 1;
status = HidP_SetUsages(
HidP_Feature,
PageId,
0,
&usage, // pointer to the usage list
&usageLength, // number of usages in the usage list
preparsedData,
report,
caps.FeatureReportByteLength
);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: HidP_SetUsages failed 0x%x\n", status));
goto ExitAndFree;
}
}
WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&inputDescriptor,
report,
caps.FeatureReportByteLength);
status = WdfIoTargetSendIoctlSynchronously(hidTarget,
NULL,
IOCTL_HID_SET_FEATURE,
&inputDescriptor,
NULL,
NULL,
NULL);
if (!NT_SUCCESS(status)) {
KdPrint(("FireFly: WdfIoTargetSendIoctlSynchronously failed 0x%x\n", status));
goto ExitAndFree;
}
ExitAndFree:
if (preparsedData != NULL) {
ExFreePool(preparsedData);
preparsedData = NULL;
}
if (report != NULL) {
ExFreePool(report);
report = NULL;
}
if (hidTarget != NULL) {
WdfObjectDelete(hidTarget);
}
return status;
}
