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windows-xp/Source/XPSP1/NT/drivers/input/hidport/kbdhid/pnp.c

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/*++
Copyright (c) 1996 Microsoft Corporation
Module Name:
hid.c
Abstract:
This module contains the code for translating HID reports to keyboard
reports.
Environment:
Kernel & user mode
Revision History:
Nov-96 : Created by Kenneth D. Ray
--*/
//
// For this module only we set the INITGUID macro before including wdm and
// hidclass.h This not only declares the guids but also initializes them.
//
#include "kbdhid.h"
#include "hidclass.h"
#include <initguid.h>
#include <wdmguid.h>
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE,KbdHid_CallHidClass)
#pragma alloc_text(PAGE,KbdHid_AddDevice)
#pragma alloc_text(PAGE,KbdHid_StartDevice)
#pragma alloc_text(PAGE,KbdHid_PnP)
#endif
NTSTATUS
KbdHid_CallHidClass(
IN PDEVICE_EXTENSION Data,
IN ULONG Ioctl,
PVOID InputBuffer,
ULONG InputBufferLength,
PVOID OutputBuffer,
ULONG OutputBufferLength
)
/*++
Routine Description:
Make a *synchronous* request of the HID class driver
Arguments:
Ioctl - Value of the IOCTL request.
InputBuffer - Buffer to be sent to the HID class driver.
InputBufferLength - Size of buffer to be sent to the HID class driver.
OutputBuffer - Buffer for received data from the HID class driver.
OutputBufferLength - Size of receive buffer from the HID class.
Return Value:
STATUS_SUCCESS if successful,
STATUS_UNSUCCESSFUL otherwise
--*/
{
KEVENT event;
PIRP irp;
IO_STATUS_BLOCK ioStatus;
PIO_STACK_LOCATION nextStack;
NTSTATUS status = STATUS_SUCCESS;
PAGED_CODE ();
Print(DBG_PNP_TRACE, ("PNP-CallHidClass: Enter." ));
//
// issue a synchronous request
//
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = IoBuildDeviceIoControlRequest (
Ioctl,
Data->TopOfStack,
InputBuffer,
InputBufferLength,
OutputBuffer,
OutputBufferLength,
FALSE, // External
&event,
&ioStatus);
if (NULL == irp) {
return STATUS_UNSUCCESSFUL;
}
//
// Call the class driver to perform the operation. If the returned status
// is PENDING, wait for the request to complete.
//
nextStack = IoGetNextIrpStackLocation(irp);
ASSERT(nextStack != NULL);
status = IoCallDriver(Data->TopOfStack, irp);
if (status == STATUS_PENDING) {
status = KeWaitForSingleObject(
&event,
Executive, // wait reason
KernelMode,
FALSE, // we are not alertable
NULL); // No time out !!!!
}
if (NT_SUCCESS (status)) {
status = ioStatus.Status;
}
Print(DBG_PNP_TRACE, ("PNP-CallHidClass: Enter." ));
return status;
}
NTSTATUS
KbdHid_QueryDeviceKey (
IN HANDLE Handle,
IN PWCHAR ValueNameString,
OUT PVOID Data,
IN ULONG DataLength
)
{
NTSTATUS status;
UNICODE_STRING valueName;
ULONG length;
PKEY_VALUE_FULL_INFORMATION fullInfo;
RtlInitUnicodeString (&valueName, ValueNameString);
length = sizeof (KEY_VALUE_FULL_INFORMATION)
+ valueName.MaximumLength
+ DataLength;
fullInfo = ExAllocatePool (PagedPool, length);
if (fullInfo) {
status = ZwQueryValueKey (Handle,
&valueName,
KeyValueFullInformation,
fullInfo,
length,
&length);
if (NT_SUCCESS (status)) {
ASSERT (DataLength == fullInfo->DataLength);
RtlCopyMemory (Data,
((PUCHAR) fullInfo) + fullInfo->DataOffset,
fullInfo->DataLength);
}
ExFreePool (fullInfo);
} else {
status = STATUS_NO_MEMORY;
}
return status;
}
NTSTATUS
KbdHid_AddDevice (
IN PDRIVER_OBJECT Driver,
IN PDEVICE_OBJECT PDO
)
/*++
Routine Description:
Arguments:
Return Value:
NTSTATUS result code.
--*/
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_EXTENSION data;
PDEVICE_OBJECT device;
POWER_STATE state;
PAGED_CODE ();
Print (DBG_PNP_TRACE, ("enter Add Device \n"));
status = IoCreateDevice(Driver,
sizeof(DEVICE_EXTENSION),
NULL, // no name for this Filter DO
FILE_DEVICE_KEYBOARD,
0,
FALSE,
&device);
if (!NT_SUCCESS (status)) {
return(status);
}
data = (PDEVICE_EXTENSION) device->DeviceExtension;
//
// Initialize the fields.
//
data->TopOfStack = IoAttachDeviceToDeviceStack (device, PDO);
if (data->TopOfStack == NULL) {
PIO_ERROR_LOG_PACKET errorLogEntry;
//
// Not good; in only extreme cases will this fail
//
errorLogEntry = (PIO_ERROR_LOG_PACKET)
IoAllocateErrorLogEntry(Driver,
(UCHAR) sizeof(IO_ERROR_LOG_PACKET));
if (errorLogEntry) {
errorLogEntry->ErrorCode = KBDHID_ATTACH_DEVICE_FAILED;
errorLogEntry->DumpDataSize = 0;
errorLogEntry->SequenceNumber = 0;
errorLogEntry->MajorFunctionCode = 0;
errorLogEntry->IoControlCode = 0;
errorLogEntry->RetryCount = 0;
errorLogEntry->UniqueErrorValue = 0;
errorLogEntry->FinalStatus = STATUS_DEVICE_NOT_CONNECTED;
IoWriteErrorLogEntry(errorLogEntry);
}
IoDeleteDevice(device);
return STATUS_DEVICE_NOT_CONNECTED;
}
ASSERT (data->TopOfStack);
data->Self = device;
data->Started = FALSE;
data->Initialized = FALSE;
data->UnitId = (USHORT) InterlockedIncrement (&Globals.UnitId);
data->PDO = PDO;
KeInitializeSpinLock(&data->usageMappingSpinLock);
data->ReadIrp = IoAllocateIrp (data->TopOfStack->StackSize, FALSE);
// Initializiation happens automatically.
if (NULL == data->ReadIrp) {
IoDetachDevice (data->TopOfStack);
IoDeleteDevice (device);
return STATUS_INSUFFICIENT_RESOURCES;
}
KeInitializeEvent (&data->ReadCompleteEvent, SynchronizationEvent, FALSE);
KeInitializeEvent (&data->ReadSentEvent, NotificationEvent, TRUE);
IoInitializeRemoveLock (&data->RemoveLock, KBDHID_POOL_TAG, 1, 10);
data->ReadFile = NULL;
ExInitializeFastMutex (&data->CreateCloseMutex);
data->InputData.UnitId = data->UnitId;
data->InputData.MakeCode = 0;
data->InputData.Flags = 0;
data->ScanState = Normal;
//
// Initialize the keyboard attributes structure. This information is
// queried via IOCTL_KEYBOARD_QUERY_ATTRIBUTES. [DAN]
//
data->Attributes.KeyboardIdentifier.Type = HID_KEYBOARD_IDENTIFIER_TYPE;
data->Attributes.KeyboardIdentifier.Subtype = 0;
data->IdEx.Type = HID_KEYBOARD_IDENTIFIER_TYPE;
data->IdEx.Subtype = 0;
data->Attributes.KeyboardMode = HID_KEYBOARD_SCAN_CODE_SET;
data->Attributes.NumberOfFunctionKeys = HID_KEYBOARD_NUMBER_OF_FUNCTION_KEYS;
data->Attributes.NumberOfIndicators = HID_KEYBOARD_NUMBER_OF_INDICATORS;
data->Attributes.NumberOfKeysTotal = HID_KEYBOARD_NUMBER_OF_KEYS_TOTAL;
data->Attributes.InputDataQueueLength = 1;
data->Attributes.KeyRepeatMinimum.UnitId = data->UnitId;
data->Attributes.KeyRepeatMinimum.Rate = HID_KEYBOARD_TYPEMATIC_RATE_MINIMUM;
data->Attributes.KeyRepeatMinimum.Delay = HID_KEYBOARD_TYPEMATIC_DELAY_MINIMUM;
data->Attributes.KeyRepeatMaximum.UnitId = data->UnitId;
data->Attributes.KeyRepeatMaximum.Rate = HID_KEYBOARD_TYPEMATIC_RATE_MAXIMUM;
data->Attributes.KeyRepeatMaximum.Delay = HID_KEYBOARD_TYPEMATIC_DELAY_MAXIMUM;
//
// Initialize the keyboard indicators structure. [DAN]
//
data->Indicators.UnitId = data->UnitId;
data->Indicators.LedFlags = 0;
//
// Initialize the keyboard typematic info structure. [DAN]
//
data->Typematic.UnitId = data->UnitId;
data->Typematic.Rate = HID_KEYBOARD_TYPEMATIC_RATE_DEFAULT;
data->Typematic.Delay = HID_KEYBOARD_TYPEMATIC_DELAY_DEFAULT;
//
// Initialize private typematic information. [DAN]
//
KeInitializeDpc (&data->AutoRepeatDPC, KbdHid_AutoRepeat, data);
KeInitializeTimer (&data->AutoRepeatTimer);
data->AutoRepeatRate = 1000 / HID_KEYBOARD_TYPEMATIC_RATE_DEFAULT; //ms
data->AutoRepeatDelay.LowPart = -HID_KEYBOARD_TYPEMATIC_DELAY_DEFAULT * 10000;
//100ns
data->AutoRepeatDelay.HighPart = -1;
#if KEYBOARD_HW_CHATTERY_FIX // [DAN]
//
// Initialize StartRead-initiator DPC.
//
KeInitializeDpc (&data->InitiateStartReadDPC,
KbdHid_InitiateStartRead,
data);
KeInitializeTimer (&data->InitiateStartReadTimer);
data->InitiateStartReadDelay.QuadPart = -DEFAULT_START_READ_DELAY;
data->InitiateStartReadUserNotified = FALSE;
#endif
state.DeviceState = PowerDeviceD0;
PoSetPowerState (device, DevicePowerState, state);
data->WmiLibInfo.GuidCount = sizeof (KbdHid_WmiGuidList) /
sizeof (WMIGUIDREGINFO);
data->WmiLibInfo.GuidList = KbdHid_WmiGuidList;
data->WmiLibInfo.QueryWmiRegInfo = KbdHid_QueryWmiRegInfo;
data->WmiLibInfo.QueryWmiDataBlock = KbdHid_QueryWmiDataBlock;
data->WmiLibInfo.SetWmiDataBlock = KbdHid_SetWmiDataBlock;
data->WmiLibInfo.SetWmiDataItem = KbdHid_SetWmiDataItem;
data->WmiLibInfo.ExecuteWmiMethod = NULL;
data->WmiLibInfo.WmiFunctionControl = NULL;
device->Flags |= DO_POWER_PAGABLE;
device->Flags &= ~DO_DEVICE_INITIALIZING;
return status;
}
NTSTATUS
KbdHid_StartDevice (
IN PDEVICE_EXTENSION Data
)
/*++
Routine Description:
Arguments:
Return Value:
NTSTATUS result code.
--*/
{
HIDP_CAPS caps; // the capabilities of the found hid device
HID_COLLECTION_INFORMATION info;
NTSTATUS status = STATUS_SUCCESS;
PHIDP_PREPARSED_DATA preparsedData = NULL;
PHID_EXTENSION hid = NULL;
ULONG length, usageListLength, inputBufferLength;
ULONG maxUsages;
PCHAR buffer;
HANDLE devInstRegKey;
ULONG tmp;
PAGED_CODE ();
Print (DBG_PNP_TRACE, ("enter START Device \n"));
//
// Check the registry for any usage mapping information
// for this particular keyboard.
//
// Note: Need to call this after devnode created
// (after START_DEVICE completes).
// For raw devices, this will fail on the first start
// (b/c devnode not there yet)
// but succeed on the second start.
//
LoadKeyboardUsageMappingList (Data);
//
// Retrieve the capabilities of this hid device
// IOCTL_HID_GET_COLLECTION_INFORMATION fills in HID_COLLECTION_INFORMATION.
// we are interested in the Descriptor Size, which tells us how big a
// buffer to allocate for the preparsed data.
//
if (!NT_SUCCESS (status = KbdHid_CallHidClass (
Data,
IOCTL_HID_GET_COLLECTION_INFORMATION,
0, 0, // no input
&info, sizeof (info)))) {
goto KbdHid_StartDeviceReject;
}
//
// Allocate memory to hold the preparsed data.
//
preparsedData = (PHIDP_PREPARSED_DATA)
ExAllocatePool (NonPagedPool, info.DescriptorSize);
if (!preparsedData) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto KbdHid_StartDeviceReject;
}
//
// Retrieve that information.
//
if (!NT_SUCCESS (status = KbdHid_CallHidClass (
Data,
IOCTL_HID_GET_COLLECTION_DESCRIPTOR,
0, 0, // no input
preparsedData, info.DescriptorSize))) {
goto KbdHid_StartDeviceReject;
}
//
// Call the parser to determine the capabilites of this HID device.
//
if (!NT_SUCCESS (status = HidP_GetCaps (preparsedData, &caps))) {
goto KbdHid_StartDeviceReject;
}
#if 0
//
// Is this the thing we want?
//
// In this particular case we are looking for a keyboard.
//
if ((HID_USAGE_PAGE_GENERIC == caps.UsagePage) &&
(HID_USAGE_GENERIC_KEYBOARD == caps.Usage)) {
;
} else {
//
// Someone made an INF blunder!
//
ASSERT ((HID_USAGE_PAGE_GENERIC == caps.UsagePage) &&
(HID_USAGE_GENERIC_KEYBOARD == caps.Usage));
status = STATUS_UNSUCCESSFUL;
goto KbdHid_StartDeviceReject;
}
#endif
//
// Set the number of buttons for this keyboard.
// Note: we are actually reading here the total number of independant
// chanels on the device. But that should be satisfactory for a keyboard.
//
Data->Attributes.NumberOfKeysTotal = caps.NumberInputDataIndices;
//
// look for any device parameters.
//
status = IoOpenDeviceRegistryKey (Data->PDO,
PLUGPLAY_REGKEY_DEVICE,
STANDARD_RIGHTS_ALL,
&devInstRegKey);
if (NT_SUCCESS (status)) {
status = KbdHid_QueryDeviceKey (devInstRegKey,
KEYBOARD_TYPE_OVERRIDE,
&tmp,
sizeof (tmp));
if (NT_SUCCESS (status)) {
Data->Attributes.KeyboardIdentifier.Type = (UCHAR) tmp;
Data->IdEx.Type = tmp;
}
status = KbdHid_QueryDeviceKey (devInstRegKey,
KEYBOARD_SUBTYPE_OVERRIDE,
&tmp,
sizeof (tmp));
if (NT_SUCCESS (status)) {
Data->Attributes.KeyboardIdentifier.Subtype = (UCHAR) tmp;
Data->IdEx.Subtype = tmp;
}
status = KbdHid_QueryDeviceKey (devInstRegKey,
KEYBOARD_NUMBER_TOTAL_KEYS_OVERRIDE,
&tmp,
sizeof (tmp));
if (NT_SUCCESS (status)) {
Data->Attributes.NumberOfKeysTotal = (USHORT) tmp;
}
status = KbdHid_QueryDeviceKey (devInstRegKey,
KEYBOARD_NUMBER_FUNCTION_KEYS_OVERRIDE,
&tmp,
sizeof (tmp));
if (NT_SUCCESS (status)) {
Data->Attributes.NumberOfFunctionKeys = (USHORT) tmp;
}
status = KbdHid_QueryDeviceKey (devInstRegKey,
KEYBOARD_NUMBER_INDICATORS_OVERRIDE,
&tmp,
sizeof (tmp));
if (NT_SUCCESS (status)) {
Data->Attributes.NumberOfIndicators = (USHORT) tmp;
}
ZwClose (devInstRegKey);
if (!NT_SUCCESS (status)) {
status = STATUS_SUCCESS;
}
}
//
// Note: here we might also want to check the button and value capabilities
// of the device as well.
//
// Then let's use it.
//
//
// a buffer length to allow an Input buffer, output buffer, feature buffer,
// and the total number of usages that can be returned from a read packet.
//
maxUsages = HidP_MaxUsageListLength (
HidP_Input,
HID_USAGE_PAGE_KEYBOARD,
preparsedData);
//
// Create space in the device extension for the buffer storage when working
// with this HID device.
//
// We need four buffers to hold the button codes (length returned from
// HidP_MaxUsageListLength) this will hold the current list of usages,
// the previous list of usages, the ``Make'' and the ``Break'' lists.
// We also need a place to put the input, output, and feature report
// buffers.
//
usageListLength = ALIGNPTRLEN(maxUsages * sizeof (USAGE_AND_PAGE));
inputBufferLength = ALIGNPTRLEN(caps.InputReportByteLength);
length = (6 * usageListLength)
+ inputBufferLength
+ sizeof (HID_EXTENSION);
Data->HidExtension = hid = ExAllocatePool (NonPagedPool, length);
if (!hid) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto KbdHid_StartDeviceReject;
}
RtlZeroMemory (hid, length);
//
// Initialize the fields.
//
hid->Ppd = preparsedData;
hid->Caps = caps;
hid->MaxUsages = maxUsages;
// hid->ModifierState.ul = 0;
hid->InputBuffer = buffer = hid->Buffer;
hid->PreviousUsageList = (PUSAGE_AND_PAGE) (buffer += inputBufferLength);
hid->CurrentUsageList = (PUSAGE_AND_PAGE) (buffer += usageListLength);
hid->BreakUsageList = (PUSAGE_AND_PAGE) (buffer += usageListLength);
hid->MakeUsageList = (PUSAGE_AND_PAGE) (buffer += usageListLength);
hid->OldMakeUsageList = (PUSAGE_AND_PAGE) (buffer += usageListLength);
hid->ScrapBreakUsageList = (PUSAGE_AND_PAGE) (buffer + usageListLength);
//
// Create the MDLs
// HidClass uses direct IO so you need MDLs
//
hid->InputMdl = IoAllocateMdl (hid->InputBuffer, // The virtual address
caps.InputReportByteLength, // length
FALSE, // No associated IRP => not secondary
FALSE, // No quota charge
0); // No associated IRP
if (NULL == hid->InputMdl) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto KbdHid_StartDeviceReject;
}
MmBuildMdlForNonPagedPool (hid->InputMdl); // Build this MDL.
return status;
KbdHid_StartDeviceReject:
if (preparsedData) {
// no need to set hid->Ppd to NULL becuase we will be freeing it as well
ExFreePool (preparsedData);
}
if (hid) {
if (hid->InputMdl) {
IoFreeMdl (hid->InputMdl);
}
ExFreePool (hid);
Data->HidExtension = NULL;
}
return status;
}
NTSTATUS
KbdHid_PnP (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
The plug and play dispatch routines.
Most of these this filter driver will completely ignore.
In all cases it must pass on the IRP to the lower driver.
Arguments:
DeviceObject - pointer to a device object.
Irp - pointer to an I/O Request Packet.
Return Value:
NT status code
--*/
{
PDEVICE_EXTENSION data;
PHID_EXTENSION hid;
PIO_STACK_LOCATION stack;
NTSTATUS status;
ULONG i, j;
PDEVICE_EXTENSION * classDataList;
LARGE_INTEGER time;
PAGED_CODE ();
data = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
stack = IoGetCurrentIrpStackLocation (Irp);
hid = data->HidExtension;
status = IoAcquireRemoveLock (&data->RemoveLock, Irp);
if (!NT_SUCCESS (status)) {
//
// Someone gave us a pnp irp after a remove. Unthinkable!
//
ASSERT (FALSE);
Irp->IoStatus.Information = 0;
Irp->IoStatus.Status = status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return status;
}
Print(DBG_PNP_TRACE, ("PNP: Minor code = %x.", stack->MinorFunction));
switch (stack->MinorFunction) {
case IRP_MN_START_DEVICE:
if (data->Started) {
Print(DBG_PNP_INFO, ("PNP: Device already started." ));
status = STATUS_SUCCESS;
Irp->IoStatus.Status = status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
break;
}
//
// The device is starting.
//
// We cannot touch the device (send it any non pnp irps) until a
// start device has been passed down to the lower drivers.
//
IoCopyCurrentIrpStackLocationToNext (Irp);
KeInitializeEvent(&data->StartEvent, NotificationEvent, FALSE);
IoSetCompletionRoutine (Irp,
KbdHid_PnPComplete,
data,
TRUE,
TRUE,
TRUE); // No need for Cancel
Irp->IoStatus.Status = STATUS_SUCCESS;
status = IoCallDriver (data->TopOfStack, Irp);
if (STATUS_PENDING == status) {
KeWaitForSingleObject(
&data->StartEvent,
Executive, // Waiting for reason of a driver
KernelMode, // Waiting in kernel mode
FALSE, // No allert
NULL); // No timeout
}
if (NT_SUCCESS (status) && NT_SUCCESS (Irp->IoStatus.Status)) {
//
// As we are successfully now back from our start device
// we can do work.
//
if (!data->Initialized) {
status = KbdHid_StartDevice (data);
if (NT_SUCCESS (status)) {
IoWMIRegistrationControl(DeviceObject,
WMIREG_ACTION_REGISTER
);
data->Started = TRUE;
data->Initialized = TRUE;
}
} else {
data->Started = TRUE;
}
}
//
// We must now complete the IRP, since we stopped it in the
// completetion routine with MORE_PROCESSING_REQUIRED.
//
Irp->IoStatus.Status = status;
Irp->IoStatus.Information = 0;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
break;
case IRP_MN_STOP_DEVICE:
//
// After the start IRP has been sent to the lower driver object, the
// bus may NOT send any more IRPS down ``touch'' until another START
// has occured.
// What ever access is required must be done before the Irp is passed
// on.
//
if (data->Started) {
//
// Do what ever
//
}
//
// We don't need a completion routine so fire and forget.
//
// Set the current stack location to the next stack location and
// call the next device object.
//
//
// Stop Device touching the hardware MouStopDevice(data, TRUE);
//
data->Started = FALSE;
Irp->IoStatus.Status = STATUS_SUCCESS;
IoSkipCurrentIrpStackLocation (Irp);
status = IoCallDriver (data->TopOfStack, Irp);
break;
case IRP_MN_REMOVE_DEVICE:
//
// The PlugPlay system has detected the removal of this device. We
// have no choise but to detach and delete the device objecct.
// (If we wanted to express and interest in preventing this removal,
// we should have filtered the query remove and query stop routines.)
//
// Note! we might receive a remove WITHOUT first receiving a stop.
// ASSERT (!usbData->Removed);
Print (DBG_PNP_TRACE, ("enter RemoveDevice \n"));
IoWMIRegistrationControl(data->Self,
WMIREG_ACTION_DEREGISTER
);
if (data->Started) {
// Stop the device without touching the hardware.
// MouStopDevice(data, FALSE);
}
//
// Here if we had any outstanding requests in a personal queue we should
// complete them all now.
//
// Note, the device could be GONE so we cannot send it any non-
// PNP IRPS.
//
time = data->AutoRepeatDelay;
KeCancelTimer (&data->AutoRepeatTimer);
#if KEYBOARD_HW_CHATTERY_FIX
KeCancelTimer (&data->InitiateStartReadTimer);
//
// NB the time is a negative (relative) number;
//
if (data->InitiateStartReadDelay.QuadPart < time.QuadPart) {
time = data->InitiateStartReadDelay;
}
#endif
KeDelayExecutionThread (KernelMode, FALSE, &time);
//
// Cancel our read IRP. [DAN]
// Note - waiting is only really necessary on 98, where pnp doesn't
// make sure all handles are closed before sending the remove.
//
data->ShuttingDown = TRUE;
KeWaitForSingleObject (&data->ReadSentEvent,
Executive,
KernelMode,
FALSE,
NULL
);
IoCancelIrp (data->ReadIrp);
//
// Send on the remove IRP
//
Irp->IoStatus.Status = STATUS_SUCCESS;
IoSkipCurrentIrpStackLocation (Irp);
status = IoCallDriver (data->TopOfStack, Irp);
//
// Wait for the remove lock to free.
//
IoReleaseRemoveLockAndWait (&data->RemoveLock, Irp);
//
// Free the associated memory.
//
IoFreeIrp (data->ReadIrp);
if (hid) {
//
// If we are removed without being started then we will have
// no hid extension
//
ExFreePool (hid->Ppd);
IoFreeMdl (hid->InputMdl);
ExFreePool (hid);
}
FreeKeyboardUsageMappingList(data);
IoDetachDevice (data->TopOfStack);
IoDeleteDevice (data->Self);
return status;
case IRP_MN_SURPRISE_REMOVAL:
case IRP_MN_QUERY_REMOVE_DEVICE:
case IRP_MN_CANCEL_REMOVE_DEVICE:
case IRP_MN_QUERY_STOP_DEVICE:
case IRP_MN_CANCEL_STOP_DEVICE:
//
// These IRPs have to have their status changed from
// STATUS_NOT_SUPPORTED b4 passing them down.
//
Irp->IoStatus.Status = STATUS_SUCCESS;
case IRP_MN_QUERY_DEVICE_RELATIONS:
case IRP_MN_QUERY_INTERFACE:
case IRP_MN_QUERY_CAPABILITIES:
case IRP_MN_QUERY_RESOURCES:
case IRP_MN_QUERY_RESOURCE_REQUIREMENTS:
case IRP_MN_READ_CONFIG:
case IRP_MN_WRITE_CONFIG:
case IRP_MN_EJECT:
case IRP_MN_SET_LOCK:
case IRP_MN_QUERY_ID:
case IRP_MN_QUERY_PNP_DEVICE_STATE:
default:
//
// Here the filter driver might modify the behavior of these IRPS
// Please see PlugPlay documentation for use of these IRPs.
//
IoSkipCurrentIrpStackLocation (Irp);
status = IoCallDriver (data->TopOfStack, Irp);
break;
}
IoReleaseRemoveLock (&data->RemoveLock, Irp);
return status;
}
NTSTATUS
KbdHid_PnPComplete (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
/*++
Routine Description:
The pnp IRP is in the process of completing.
signal
Arguments:
Context set to the device object in question.
--*/
{
PIO_STACK_LOCATION stack;
PDEVICE_EXTENSION data;
NTSTATUS status;
UNREFERENCED_PARAMETER (DeviceObject);
status = STATUS_SUCCESS;
data = (PDEVICE_EXTENSION) Context;
stack = IoGetCurrentIrpStackLocation (Irp);
if (Irp->PendingReturned) {
IoMarkIrpPending( Irp );
}
switch (stack->MajorFunction) {
case IRP_MJ_PNP:
switch (stack->MinorFunction) {
case IRP_MN_START_DEVICE:
KeSetEvent (&data->StartEvent, 0, FALSE);
//
// Take the IRP back so that we can continue using it during
// the IRP_MN_START_DEVICE dispatch routine.
// NB: we will have to call IoCompleteRequest
//
return STATUS_MORE_PROCESSING_REQUIRED;
default:
break;
}
break;
case IRP_MJ_POWER:
default:
break;
}
return status;
}
NTSTATUS
KbdHid_Power (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
{
PIO_STACK_LOCATION stack;
NTSTATUS status;
PDEVICE_EXTENSION data;
POWER_STATE powerState;
POWER_STATE_TYPE powerType;
Print(DBG_POWER_TRACE, ("Power Enter." ));
data = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
stack = IoGetCurrentIrpStackLocation (Irp);
powerType = stack->Parameters.Power.Type;
powerState = stack->Parameters.Power.State;
status = IoAcquireRemoveLock (&data->RemoveLock, Irp);
if (!NT_SUCCESS (status)) {
PoStartNextPowerIrp (Irp);
Irp->IoStatus.Status = status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return status;
}
switch (stack->MinorFunction) {
case IRP_MN_SET_POWER:
Print(DBG_POWER_INFO, ("Power Setting %s state to %d\n",
((powerType == SystemPowerState) ? "System"
: "Device"),
powerState.SystemState));
break;
case IRP_MN_QUERY_POWER:
Print (DBG_POWER_INFO, ("Power query %s status to %d\n",
((powerType == SystemPowerState) ? "System"
: "Device"),
powerState.SystemState));
break;
default:
Print (DBG_POWER_ERROR, ("Power minor (0x%x) no known\n",
stack->MinorFunction));
}
PoStartNextPowerIrp (Irp);
IoSkipCurrentIrpStackLocation (Irp);
status = PoCallDriver (data->TopOfStack, Irp);
IoReleaseRemoveLock (&data->RemoveLock, Irp);
return status;
}