982 lines
30 KiB
C
982 lines
30 KiB
C
/*++
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Copyright (c) 1997-1998 Microsoft Corporation, All Rights Reserved
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Module Name:
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pnp.c
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Abstract:
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This module contains plug & play code for the serial Mouse Filter Driver,
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including code for the creation and removal of serial mouse device contexts.
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Environment:
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Kernel & user mode.
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Revision History:
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--*/
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#include "mouser.h"
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#include "sermlog.h"
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#include "debug.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, SerialMouseAddDevice)
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#pragma alloc_text(PAGE, SerialMousePnP)
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#pragma alloc_text(PAGE, SerialMousePower)
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#pragma alloc_text(PAGE, SerialMouseRemoveDevice)
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#pragma alloc_text(PAGE, SerialMouseSendIrpSynchronously)
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#endif
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NTSTATUS
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SerialMouseAddDevice (
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IN PDRIVER_OBJECT Driver,
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IN PDEVICE_OBJECT PDO
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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NTSTATUS result code.
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--*/
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{
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NTSTATUS status = STATUS_SUCCESS;
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PDEVICE_EXTENSION deviceExtension;
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PDEVICE_OBJECT device;
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KIRQL oldIrql;
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PAGED_CODE();
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status = IoCreateDevice(Driver,
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sizeof(DEVICE_EXTENSION),
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NULL, // no name for this Filter DO
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FILE_DEVICE_SERIAL_MOUSE_PORT,
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0,
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FALSE,
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&device);
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if (!NT_SUCCESS(status)) {
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return status;
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}
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deviceExtension = (PDEVICE_EXTENSION) device->DeviceExtension;
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Print(deviceExtension, DBG_PNP_TRACE, ("enter Add Device\n"));
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//
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// Initialize the fields.
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//
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RtlZeroMemory(deviceExtension, sizeof(DEVICE_EXTENSION));
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deviceExtension->TopOfStack = IoAttachDeviceToDeviceStack(device, PDO);
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if (deviceExtension->TopOfStack == NULL) {
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PIO_ERROR_LOG_PACKET errorLogEntry;
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//
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// Not good; in only extreme cases will this fail
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//
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errorLogEntry = (PIO_ERROR_LOG_PACKET)
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IoAllocateErrorLogEntry(Driver,
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(UCHAR) sizeof(IO_ERROR_LOG_PACKET));
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if (errorLogEntry) {
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errorLogEntry->ErrorCode = SERMOUSE_ATTACH_DEVICE_FAILED;
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errorLogEntry->DumpDataSize = 0;
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errorLogEntry->SequenceNumber = 0;
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errorLogEntry->MajorFunctionCode = 0;
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errorLogEntry->IoControlCode = 0;
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errorLogEntry->RetryCount = 0;
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errorLogEntry->UniqueErrorValue = 0;
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errorLogEntry->FinalStatus = STATUS_DEVICE_NOT_CONNECTED;
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IoWriteErrorLogEntry(errorLogEntry);
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}
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IoDeleteDevice(device);
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return STATUS_DEVICE_NOT_CONNECTED;
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}
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ASSERT(deviceExtension->TopOfStack);
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deviceExtension->PDO = PDO;
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deviceExtension->Self = device;
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deviceExtension->Removed = FALSE;
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deviceExtension->Started = FALSE;
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deviceExtension->Stopped = FALSE;
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deviceExtension->PowerState = PowerDeviceD0;
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deviceExtension->WaitWakePending = FALSE;
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KeInitializeSpinLock(&deviceExtension->PnpStateLock);
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KeInitializeEvent(&deviceExtension->StopEvent, SynchronizationEvent, FALSE);
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IoInitializeRemoveLock(&deviceExtension->RemoveLock, SERMOU_POOL_TAG, 0, 10);
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deviceExtension->ReadIrp = IoAllocateIrp( device->StackSize, FALSE );
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if (!deviceExtension->ReadIrp) {
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//
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// The ReadIrp is critical to this driver, if we can't get one, no use
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// in going any further
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//
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IoDetachDevice(deviceExtension->TopOfStack);
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IoDeleteDevice(device);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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deviceExtension->WmiLibInfo.GuidCount = sizeof(WmiGuidList) /
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sizeof(WMIGUIDREGINFO);
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deviceExtension->WmiLibInfo.GuidList = WmiGuidList;
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deviceExtension->WmiLibInfo.QueryWmiRegInfo = SerialMouseQueryWmiRegInfo;
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deviceExtension->WmiLibInfo.QueryWmiDataBlock = SerialMouseQueryWmiDataBlock;
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deviceExtension->WmiLibInfo.SetWmiDataBlock = SerialMouseSetWmiDataBlock;
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deviceExtension->WmiLibInfo.SetWmiDataItem = SerialMouseSetWmiDataItem;
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deviceExtension->WmiLibInfo.ExecuteWmiMethod = NULL;
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deviceExtension->WmiLibInfo.WmiFunctionControl = NULL;
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IoWMIRegistrationControl(deviceExtension->Self, WMIREG_ACTION_REGISTER);
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KeInitializeTimer(&deviceExtension->DelayTimer);
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//
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// Set all the appropriate device object flags
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//
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device->Flags &= ~DO_DEVICE_INITIALIZING;
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device->Flags |= DO_BUFFERED_IO;
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device->Flags |= DO_POWER_PAGABLE;
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return status;
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}
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VOID
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SerialMouseRemoveDevice(
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PDEVICE_EXTENSION DeviceExtension,
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PIRP Irp
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)
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{
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BOOLEAN closePort = FALSE;
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PAGED_CODE();
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//
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// Run the (surprise remove code). If we are surprise removed, then this
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// will be called twice. We only run the removal code once.
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//
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if (!DeviceExtension->SurpriseRemoved) {
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DeviceExtension->SurpriseRemoved = TRUE;
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//
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// Here if we had any outstanding requests in a personal queue we should
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// complete them all now.
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//
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// Note, the device could be GONE so we cannot send it any non-
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// PNP IRPS.
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//
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IoWMIRegistrationControl(DeviceExtension->Self, WMIREG_ACTION_DEREGISTER);
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if (DeviceExtension->Started && DeviceExtension->EnableCount > 0) {
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Print(DeviceExtension, DBG_PNP_INFO,
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("Cancelling and stopping detection for remove\n"));
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IoCancelIrp(DeviceExtension->ReadIrp);
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//
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// Cancel the detection timer, SerialMouseRemoveLockAndWait will
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// guarantee that we don't yank the device from under the polling
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// routine
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//
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SerialMouseStopDetection(DeviceExtension);
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}
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}
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//
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// The stack is about to be torn down, make sure that the underlying serial
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// port is closed. No other piece of code will be looking at EnableCount if
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// Remove is true, so there is no need for InterlockedXxx.
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//
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if (DeviceExtension->Removed && DeviceExtension->EnableCount > 0) {
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Print(DeviceExtension, DBG_PNP_INFO | DBG_PNP_ERROR,
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("sending final close, enable count %d\n",
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DeviceExtension->EnableCount));
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DeviceExtension->EnableCount = 0;
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SerialMouseClosePort(DeviceExtension, Irp);
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}
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}
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NTSTATUS
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SerialMouseCompletionRoutine (
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PKEVENT Event
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)
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/*++
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Routine Description:
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The pnp IRP is in the process of completing.
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signal
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Arguments:
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Context set to the device object in question.
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--*/
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{
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UNREFERENCED_PARAMETER(DeviceObject);
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UNREFERENCED_PARAMETER(Irp);
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KeSetEvent(Event, 0, FALSE);
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return STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS
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SerialMouseSendIrpSynchronously (
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN BOOLEAN CopyToNext
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)
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{
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KEVENT event;
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NTSTATUS status;
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PAGED_CODE();
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KeInitializeEvent(&event, SynchronizationEvent, FALSE);
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if (CopyToNext) {
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IoCopyCurrentIrpStackLocationToNext(Irp);
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}
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IoSetCompletionRoutine(Irp,
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SerialMouseCompletionRoutine,
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&event,
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TRUE, // on success
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TRUE, // on error
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TRUE // on cancel
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);
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status = IoCallDriver(DeviceObject, Irp);
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//
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// Wait for lower drivers to be done with the Irp
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//
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if (status == STATUS_PENDING) {
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KeWaitForSingleObject(&event,
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Executive,
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KernelMode,
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FALSE,
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NULL
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);
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status = Irp->IoStatus.Status;
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}
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return status;
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}
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void
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SerialMouseHandleStartStopStart(
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IN PDEVICE_EXTENSION DeviceExtension
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)
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{
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KIRQL irql;
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KeAcquireSpinLock(&DeviceExtension->PnpStateLock, &irql);
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if (DeviceExtension->Stopped) {
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DeviceExtension->Stopped = FALSE;
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IoReuseIrp(DeviceExtension->ReadIrp, STATUS_SUCCESS);
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}
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KeReleaseSpinLock(&DeviceExtension->PnpStateLock, irql);
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}
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void
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SerialMouseStopDevice (
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IN PDEVICE_EXTENSION DeviceExtension
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)
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{
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KIRQL irql;
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KeAcquireSpinLock(&DeviceExtension->PnpStateLock, &irql);
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DeviceExtension->Stopped = TRUE;
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KeReleaseSpinLock(&DeviceExtension->PnpStateLock, irql);
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if (DeviceExtension->Started) {
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Print(DeviceExtension, DBG_PNP_INFO,
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("Cancelling and stopping detection for stop\n"));
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DeviceExtension->Started = FALSE;
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//
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// Stop detection and cancel the read
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//
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SerialMouseStopDetection(DeviceExtension);
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//
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// BUGBUG: should I only wait if IoCancelIrp fails?
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//
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if (!IoCancelIrp(DeviceExtension->ReadIrp)) {
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//
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// Wait for the read irp to complete
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//
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Print(DeviceExtension, DBG_PNP_INFO, ("Waiting for stop event\n"));
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KeWaitForSingleObject(&DeviceExtension->StopEvent,
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Executive,
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KernelMode,
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FALSE,
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NULL
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);
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Print(DeviceExtension, DBG_PNP_INFO, ("Done waiting for stop event\n"));
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}
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}
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}
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NTSTATUS
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SerialMousePnP (
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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The plug and play dispatch routines.
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Most of these this filter driver will completely ignore.
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In all cases it must pass on the IRP to the lower driver.
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Arguments:
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DeviceObject - pointer to a device object.
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Irp - pointer to an I/O Request Packet.
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Return Value:
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NT status code
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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PIO_STACK_LOCATION stack;
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HANDLE keyHandle;
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NTSTATUS status;
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KIRQL oldIrql;
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BOOLEAN skipIt = FALSE;
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PAGED_CODE();
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deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
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stack = IoGetCurrentIrpStackLocation(Irp);
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status = IoAcquireRemoveLock(&deviceExtension->RemoveLock, Irp);
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if (!NT_SUCCESS(status)) {
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//
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// Someone gave us a pnp irp after a remove. Unthinkable!
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//
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ASSERT(FALSE);
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Irp->IoStatus.Information = 0;
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Irp->IoStatus.Status = status;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return status;
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}
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Print(deviceExtension, DBG_PNP_TRACE,
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("PnP Enter (min func=0x%x)\n", stack->MinorFunction));
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switch (stack->MinorFunction) {
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case IRP_MN_START_DEVICE:
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//
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// Send the actual start down the stack
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//
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status = SerialMouseSendIrpSynchronously(deviceExtension->TopOfStack,
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Irp,
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TRUE);
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if (NT_SUCCESS(status) && NT_SUCCESS(Irp->IoStatus.Status)) {
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PIO_STACK_LOCATION nextStack;
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//
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// If a create has not been sent down the stack yet, then send one
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// now. The serial port driver reequires a create before
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// any reads or IOCTLS are to be sent.
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//
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if (InterlockedIncrement(&deviceExtension->EnableCount) == 1) {
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NTSTATUS prevStatus;
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ULONG_PTR prevInformation;
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//
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// No previous create has been sent, send one now
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//
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prevStatus = Irp->IoStatus.Status;
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prevInformation = Irp->IoStatus.Information;
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nextStack = IoGetNextIrpStackLocation (Irp);
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RtlZeroMemory(nextStack, sizeof(IO_STACK_LOCATION));
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nextStack->MajorFunction = IRP_MJ_CREATE;
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status =
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SerialMouseSendIrpSynchronously(deviceExtension->TopOfStack,
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Irp,
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FALSE);
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Print(deviceExtension, DBG_PNP_NOISE,
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("Create for start 0x%x\n", status));
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if (NT_SUCCESS(status) && NT_SUCCESS(Irp->IoStatus.Status)) {
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Irp->IoStatus.Status = prevStatus;
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Irp->IoStatus.Information = prevInformation;
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}
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else {
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Print(deviceExtension, DBG_CC_ERROR | DBG_PNP_ERROR,
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("Create for start failed, 0x%x!\n", status));
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goto SerialMouseStartFinished;
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}
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}
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//
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// Open the device registry key and read the devnode stored values
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//
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status = IoOpenDeviceRegistryKey(deviceExtension->PDO,
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PLUGPLAY_REGKEY_DEVICE,
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STANDARD_RIGHTS_READ,
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&keyHandle);
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if (NT_SUCCESS(status)) {
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SerialMouseServiceParameters(deviceExtension, keyHandle);
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ZwClose(keyHandle);
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}
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//
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// Handle the transition from start to stop to start correctly
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//
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SerialMouseHandleStartStopStart(deviceExtension);
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//
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// Initialize the device to make sure we can start it and report
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// data from it
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//
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status = SerialMouseInitializeDevice(deviceExtension);
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Print(deviceExtension, DBG_PNP_INFO,
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("Start InitializeDevice 0x%x\n", status));
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if (InterlockedDecrement(&deviceExtension->EnableCount) == 0) {
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//
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// We will start the read loop when we receive a "real" create
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// from the raw input thread. We do not keep our own create
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// around after the start device because it will mess up the
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// logic for handling QUERY_REMOVE (our "fake" create will still
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// be in effect and the QUERY_REMOVE will fail).
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//
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Print(deviceExtension, DBG_PNP_NOISE,
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("sending close for start\n"));
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SerialMouseClosePort(deviceExtension, Irp);
|
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}
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else {
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//
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// We already have an outstanding create, just spin up the read
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// loop again
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//
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ASSERT(deviceExtension->EnableCount >= 1);
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Print(deviceExtension, DBG_PNP_INFO,
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("spinning up read in start\n"));
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status = SerialMouseSpinUpRead(deviceExtension);
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}
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}
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SerialMouseStartFinished:
|
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Irp->IoStatus.Status = status;
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Irp->IoStatus.Information = 0;
|
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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break;
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case IRP_MN_STOP_DEVICE:
|
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//
|
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// After the start IRP has been sent to the lower driver object, the
|
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// bus may NOT send any more IRPS down ``touch'' until another START
|
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// has occured.
|
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// What ever access is required must be done before the Irp is passed
|
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// on.
|
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//
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SerialMouseStopDevice(deviceExtension);
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//
|
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// We don't need a completion routine so fire and forget.
|
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//
|
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skipIt = TRUE;
|
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Irp->IoStatus.Status = STATUS_SUCCESS;
|
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break;
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|
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case IRP_MN_SURPRISE_REMOVAL:
|
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SerialMouseRemoveDevice(deviceExtension, Irp);
|
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skipIt = TRUE;
|
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Irp->IoStatus.Status = STATUS_SUCCESS;
|
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break;
|
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|
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case IRP_MN_REMOVE_DEVICE:
|
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//
|
|
// The PlugPlay system has dictacted the removal of this device. We
|
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// have no choise but to detach and delete the device objecct.
|
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// (If we wanted to express and interest in preventing this removal,
|
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// we should have filtered the query remove and query stop routines.)
|
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//
|
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// Note! we might receive a remove WITHOUT first receiving a stop.
|
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//
|
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Print(deviceExtension, DBG_PNP_TRACE, ("enter RemoveDevice \n"));
|
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|
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deviceExtension->Removed = TRUE;
|
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SerialMouseRemoveDevice(deviceExtension, Irp);
|
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|
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//
|
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// Send on the remove IRP
|
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//
|
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Irp->IoStatus.Status = STATUS_SUCCESS;
|
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IoSkipCurrentIrpStackLocation(Irp);
|
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status = IoCallDriver(deviceExtension->TopOfStack, Irp);
|
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|
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//
|
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// Wait for the remove lock to free.
|
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//
|
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IoReleaseRemoveLockAndWait(&deviceExtension->RemoveLock, Irp);
|
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|
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//
|
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// Free the associated memory.
|
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//
|
|
IoFreeIrp(deviceExtension->ReadIrp);
|
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deviceExtension->ReadIrp = NULL;
|
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if (deviceExtension->DetectionIrp) {
|
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IoFreeIrp(deviceExtension->DetectionIrp);
|
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deviceExtension->DetectionIrp = NULL;
|
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}
|
|
|
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Print(deviceExtension, DBG_PNP_NOISE, ("remove and wait done\n"));
|
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|
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IoDetachDevice(deviceExtension->TopOfStack);
|
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IoDeleteDevice(deviceExtension->Self);
|
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|
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return status;
|
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|
|
case IRP_MN_QUERY_CAPABILITIES:
|
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|
|
status = SerialMouseSendIrpSynchronously(deviceExtension->TopOfStack,
|
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Irp,
|
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TRUE);
|
|
|
|
if (NT_SUCCESS(status) && NT_SUCCESS(Irp->IoStatus.Status)) {
|
|
PDEVICE_CAPABILITIES devCaps;
|
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|
|
devCaps = stack->Parameters.DeviceCapabilities.Capabilities;
|
|
|
|
if (devCaps) {
|
|
SYSTEM_POWER_STATE i;
|
|
|
|
//
|
|
// We do not want to show up in the hot plug removal applet
|
|
//
|
|
devCaps->SurpriseRemovalOK = TRUE;
|
|
|
|
//
|
|
// While the underlying serial bus might be able to wake the
|
|
// machine from low power (via wake on ring), the mouse cannot.
|
|
//
|
|
devCaps->SystemWake = PowerSystemUnspecified;
|
|
devCaps->DeviceWake = PowerDeviceUnspecified;
|
|
devCaps->WakeFromD0 =
|
|
devCaps->WakeFromD1 =
|
|
devCaps->WakeFromD2 =
|
|
devCaps->WakeFromD3 = FALSE;
|
|
|
|
devCaps->DeviceState[PowerSystemWorking] = PowerDeviceD0;
|
|
for (i = PowerSystemSleeping1; i < PowerSystemMaximum; i++) {
|
|
devCaps->DeviceState[i] = PowerDeviceD3;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// status, Irp->IoStatus.Status set above
|
|
//
|
|
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
|
break;
|
|
|
|
case IRP_MN_QUERY_PNP_DEVICE_STATE:
|
|
status = SerialMouseSendIrpSynchronously(deviceExtension->TopOfStack,
|
|
Irp,
|
|
TRUE);
|
|
//
|
|
// If the lower filter does not support this Irp, this is
|
|
// OK, we can ignore this error
|
|
//
|
|
if (status == STATUS_NOT_SUPPORTED ||
|
|
status == STATUS_INVALID_DEVICE_REQUEST) {
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
|
|
if (NT_SUCCESS(status) && deviceExtension->RemovalDetected) {
|
|
(PNP_DEVICE_STATE) Irp->IoStatus.Information |= PNP_DEVICE_REMOVED;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status)) {
|
|
Print(deviceExtension, DBG_PNP_ERROR,
|
|
("error pending query pnp device state event (0x%x)\n",
|
|
status
|
|
));
|
|
}
|
|
|
|
//
|
|
// Irp->IoStatus.Information will contain the new i/o resource
|
|
// requirements list so leave it alone
|
|
//
|
|
Irp->IoStatus.Status = status;
|
|
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
|
|
|
break;
|
|
|
|
case IRP_MN_QUERY_REMOVE_DEVICE:
|
|
case IRP_MN_CANCEL_REMOVE_DEVICE:
|
|
case IRP_MN_QUERY_STOP_DEVICE:
|
|
case IRP_MN_CANCEL_STOP_DEVICE:
|
|
case IRP_MN_QUERY_DEVICE_RELATIONS:
|
|
case IRP_MN_QUERY_INTERFACE:
|
|
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:
|
|
default:
|
|
skipIt = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (skipIt) {
|
|
//
|
|
// Don't touch the irp...
|
|
//
|
|
IoSkipCurrentIrpStackLocation(Irp);
|
|
status = IoCallDriver(deviceExtension->TopOfStack, Irp);
|
|
}
|
|
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Irp);
|
|
|
|
Print(deviceExtension, DBG_PNP_TRACE, ("PnP exit (%x)\n", status));
|
|
return status;
|
|
}
|
|
|
|
typedef struct _MOUSER_START_WORKITEM {
|
|
PDEVICE_EXTENSION DeviceExtension;
|
|
PIO_WORKITEM WorkItem;
|
|
} MOUSER_START_WORKITEM, *PMOUSER_START_WORKITEM;
|
|
|
|
VOID
|
|
StartDeviceWorker (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN PMOUSER_START_WORKITEM WorkItemContext
|
|
)
|
|
{
|
|
PDEVICE_EXTENSION deviceExtension = WorkItemContext->DeviceExtension;
|
|
NTSTATUS status;
|
|
PIRP irp;
|
|
|
|
if (deviceExtension->Started &&
|
|
!deviceExtension->Removed &&
|
|
deviceExtension->EnableCount > 0) {
|
|
irp = IoAllocateIrp( deviceExtension->Self->StackSize, FALSE );
|
|
if (irp) {
|
|
status = SerialMouseStartDevice(deviceExtension,
|
|
irp,
|
|
FALSE);
|
|
|
|
if (!NT_SUCCESS(status)) {
|
|
KEVENT event;
|
|
IO_STATUS_BLOCK iosb;
|
|
|
|
Print(deviceExtension, DBG_POWER_INFO,
|
|
("mouse not found on power up, 0x%x\n", status));
|
|
|
|
//
|
|
// The device has been removed or is not detectable
|
|
// after powering back up ... have serenum do the
|
|
// removal work
|
|
//
|
|
KeInitializeEvent(&event, SynchronizationEvent, FALSE);
|
|
|
|
SerialMouseIoSyncInternalIoctl(
|
|
IOCTL_INTERNAL_SERENUM_REMOVE_SELF,
|
|
deviceExtension->TopOfStack,
|
|
&event,
|
|
&iosb
|
|
);
|
|
}
|
|
IoFreeIrp(irp);
|
|
}
|
|
}
|
|
|
|
IoFreeWorkItem(WorkItemContext->WorkItem);
|
|
ExFreePool(WorkItemContext);
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, deviceExtension);
|
|
}
|
|
|
|
NTSTATUS
|
|
SerialMousePower (
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
The power dispatch routine.
|
|
|
|
All we care about is the transition from a low D state to D0.
|
|
|
|
Arguments:
|
|
|
|
DeviceObject - pointer to a device object.
|
|
|
|
Irp - pointer to an I/O Request Packet.
|
|
|
|
Return Value:
|
|
|
|
NT status code
|
|
|
|
--*/
|
|
{
|
|
PIO_STACK_LOCATION stack;
|
|
NTSTATUS status = STATUS_SUCCESS;
|
|
PDEVICE_EXTENSION deviceExtension = DeviceObject->DeviceExtension;
|
|
POWER_STATE powerState;
|
|
POWER_STATE_TYPE powerType;
|
|
KEVENT event;
|
|
IO_STATUS_BLOCK iosb;
|
|
LARGE_INTEGER li;
|
|
|
|
PAGED_CODE();
|
|
|
|
Print(deviceExtension, DBG_POWER_TRACE, ("Power Enter.\n"));
|
|
|
|
deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
|
|
stack = IoGetCurrentIrpStackLocation(Irp);
|
|
powerType = stack->Parameters.Power.Type;
|
|
powerState = stack->Parameters.Power.State;
|
|
|
|
status = IoAcquireRemoveLock(&deviceExtension->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_WAIT_WAKE:
|
|
break;
|
|
|
|
case IRP_MN_SET_POWER:
|
|
//
|
|
// Let system power irps fall through
|
|
//
|
|
if (powerType == DevicePowerState &&
|
|
powerState.DeviceState != deviceExtension->PowerState) {
|
|
switch (powerState.DeviceState) {
|
|
case PowerDeviceD0:
|
|
|
|
//
|
|
// Transitioning from a low D state to D0
|
|
//
|
|
Print(deviceExtension, DBG_POWER_INFO,
|
|
("Powering up to PowerDeviceD0\n"));
|
|
|
|
KeInitializeEvent(&event, SynchronizationEvent, FALSE);
|
|
|
|
deviceExtension->PoweringDown = FALSE;
|
|
|
|
deviceExtension->PowerState =
|
|
stack->Parameters.Power.State.DeviceState;
|
|
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
IoSetCompletionRoutine(Irp,
|
|
SerialMouseCompletionRoutine,
|
|
&event,
|
|
TRUE, // on success
|
|
TRUE, // on error
|
|
TRUE // on cancel
|
|
);
|
|
|
|
status = PoCallDriver(deviceExtension->TopOfStack, Irp);
|
|
|
|
//
|
|
// Wait for lower drivers to be done with the Irp
|
|
//
|
|
if (status == STATUS_PENDING) {
|
|
KeWaitForSingleObject(&event,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL
|
|
);
|
|
status = Irp->IoStatus.Status;
|
|
}
|
|
|
|
if (NT_SUCCESS(status) && NT_SUCCESS(Irp->IoStatus.Status)) {
|
|
|
|
PoSetPowerState(DeviceObject, powerType, powerState);
|
|
|
|
if (NT_SUCCESS(IoAcquireRemoveLock(&deviceExtension->RemoveLock, deviceExtension))) {
|
|
PIO_WORKITEM workItem;
|
|
PMOUSER_START_WORKITEM workItemContext;
|
|
|
|
workItem = IoAllocateWorkItem(DeviceObject);
|
|
|
|
if (workItem) {
|
|
workItemContext = ExAllocatePool(NonPagedPool, sizeof(MOUSER_START_WORKITEM));
|
|
if (workItemContext) {
|
|
workItemContext->WorkItem = workItem;
|
|
workItemContext->DeviceExtension = deviceExtension;
|
|
IoQueueWorkItem(
|
|
workItem,
|
|
StartDeviceWorker,
|
|
DelayedWorkQueue,
|
|
workItemContext);
|
|
} else {
|
|
IoFreeWorkItem(workItem);
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, deviceExtension);
|
|
}
|
|
} else {
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, deviceExtension);
|
|
}
|
|
}
|
|
}
|
|
|
|
Irp->IoStatus.Status = status;
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Irp);
|
|
PoStartNextPowerIrp(Irp);
|
|
IoCompleteRequest(Irp, IO_NO_INCREMENT);
|
|
return status;
|
|
|
|
case PowerDeviceD1:
|
|
case PowerDeviceD2:
|
|
case PowerDeviceD3:
|
|
|
|
deviceExtension->PoweringDown = TRUE;
|
|
|
|
// If a wait wake is pending against the mouse, keep it powered
|
|
//
|
|
if (deviceExtension->WaitWakePending) {
|
|
Print(deviceExtension, DBG_POWER_INFO,
|
|
("Ignoring power down for wait wake (-> D%d)\n",
|
|
powerState.DeviceState-1
|
|
));
|
|
break;
|
|
}
|
|
|
|
Print(deviceExtension, DBG_POWER_INFO,
|
|
("Powering down to PowerDeviceD%d\n",
|
|
powerState.DeviceState-1
|
|
));
|
|
|
|
//
|
|
// Acquire another reference to the lock so that the decrement
|
|
// in the cancel section of the completion routine will not fall
|
|
// to zero (and have the remlock think we are removed)
|
|
//
|
|
// status = IoAcquireRemoveLock(&deviceExtension->RemoveLock,
|
|
// deviceExtension->ReadIrp);
|
|
ASSERT(NT_SUCCESS(status));
|
|
|
|
deviceExtension->PowerState =
|
|
stack->Parameters.Power.State.DeviceState;
|
|
|
|
//
|
|
// Cancel the read irp so that it won't conflict with power up
|
|
// initialization (which involves some reads against the port)
|
|
//
|
|
IoCancelIrp(deviceExtension->ReadIrp);
|
|
|
|
//
|
|
// We don't want the powering down of the port to be confused
|
|
// with removal
|
|
//
|
|
SerialMouseStopDetection(deviceExtension);
|
|
|
|
//
|
|
// Power down the device by clearing RTS and waiting 150 ms
|
|
//
|
|
Print(deviceExtension, DBG_POWER_INFO, ("Clearing RTS...\n"));
|
|
KeInitializeEvent(&event, NotificationEvent, FALSE);
|
|
status = SerialMouseIoSyncIoctl(IOCTL_SERIAL_CLR_RTS,
|
|
deviceExtension->TopOfStack,
|
|
&event,
|
|
&iosb
|
|
);
|
|
|
|
if (NT_SUCCESS(status)) {
|
|
Print(deviceExtension, DBG_POWER_INFO, ("150ms wait\n"));
|
|
|
|
li.QuadPart = (LONGLONG) -PAUSE_150_MS;
|
|
KeDelayExecutionThread(KernelMode, FALSE, &li);
|
|
}
|
|
|
|
PoSetPowerState(DeviceObject,
|
|
stack->Parameters.Power.Type,
|
|
stack->Parameters.Power.State);
|
|
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Irp);
|
|
|
|
//
|
|
// Fire and forget
|
|
//
|
|
Irp->IoStatus.Status = STATUS_SUCCESS;
|
|
IoCopyCurrentIrpStackLocationToNext(Irp);
|
|
|
|
PoStartNextPowerIrp(Irp);
|
|
return PoCallDriver(deviceExtension->TopOfStack, Irp);
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case IRP_MN_QUERY_POWER:
|
|
break;
|
|
|
|
default:
|
|
Print(deviceExtension, DBG_POWER_ERROR,
|
|
("Power minor (0x%x) is not handled\n", stack->MinorFunction));
|
|
}
|
|
|
|
//
|
|
// Must call the Po versions of these functions or bad things (tm) will happen!
|
|
//
|
|
PoStartNextPowerIrp(Irp);
|
|
IoSkipCurrentIrpStackLocation(Irp);
|
|
status = PoCallDriver(deviceExtension->TopOfStack, Irp);
|
|
|
|
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Irp);
|
|
|
|
return status;
|
|
}
|