608 lines
21 KiB
C++
608 lines
21 KiB
C++
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/*
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* title: HidBattIOCT.cpp
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*
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* purpose: Contains misc ioctl handlers for status and query info mainly
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*
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* Initial checkin for the hid to battery class driver. This should be
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* the same for both Win 98 and NT 5. Alpha level source. Requires
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* modified composite battery driver and modified battery class driver for
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* Windows 98 support
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*
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*/
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#include "hidbatt.h"
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/*++
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Routine Description:
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IOCTL handler. As this is an exclusive battery device, send the
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Irp to the battery class driver to handle battery IOCTLs.
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Arguments:
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DeviceObject - Battery for request
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Irp - IO request
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Return Value:
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Status of request
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--*/
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NTSTATUS
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HidBattIoControl(
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IN PDEVICE_OBJECT pDeviceObject,
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IN PIRP pIrp
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)
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{
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NTSTATUS ntStatus = STATUS_NOT_SUPPORTED;
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CBatteryDevExt * pDevExt;
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PIO_STACK_LOCATION irpSp;
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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irpSp = IoGetCurrentIrpStackLocation(pIrp);
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HidBattPrint (HIDBATT_TRACE, ("HidBattIoctl = %x\n", irpSp->Parameters.DeviceIoControl.IoControlCode));
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// PrintIoctl(irpSp->Parameters.DeviceIoControl.IoControlCode);
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pDevExt = (CBatteryDevExt *) pDeviceObject->DeviceExtension;
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if (NT_SUCCESS(IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag)))
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{
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if (pDevExt->m_pBattery &&
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pDevExt->m_pBattery->m_pBatteryClass) {
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ntStatus = BatteryClassIoctl (pDevExt->m_pBattery->m_pBatteryClass, pIrp);
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}
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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} else {
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ntStatus = STATUS_DEVICE_REMOVED;
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pIrp->IoStatus.Status = ntStatus;
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IoCompleteRequest(pIrp,IO_NO_INCREMENT);
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}
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if (ntStatus == STATUS_NOT_SUPPORTED)
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{
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HidBattCallLowerDriver(ntStatus, pDevExt->m_pLowerDeviceObject, pIrp);
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}
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return ntStatus;
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}
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VOID
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HidBattNotifyHandler (
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IN PVOID pContext,
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IN CUsage * pUsage
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)
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{
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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NTSTATUS ntStatus;
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ULONG ulCapacityLimit = BATTERY_UNKNOWN_CAPACITY;
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BOOL bResult;
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HidBattPrint (HIDBATT_TRACE, ("HidBattNotifyHandler\n"));
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// called by input routine whenever a value change is noted to
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// a notificable usage
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) pContext;
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HidBattPrint (HIDBATT_DATA, ("HidBattNotifyHandler: Usage: %x\n", pUsage->m_pProperties->m_Usage));
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switch (pUsage->m_pProperties->m_Usage)
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{
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case REMAINING_CAPACITY_ID:
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bResult = pDevExt->m_pBattery->GetSetValue(REMAINING_CAPACITY_LIMIT_INDEX,&ulCapacityLimit,FALSE);
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// Only send notification when capacity drops below notify level.
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if ((bResult) && (ulCapacityLimit != BATTERY_UNKNOWN_CAPACITY) && (pUsage->m_Value != BATTERY_UNKNOWN_CAPACITY)
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&& (pUsage->m_Value > ulCapacityLimit)) {
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HidBattPrint (HIDBATT_TRACE, ("HidBattNotifyHandler:Suppressing notify\n"));
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break;
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}
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case AC_PRESENT_ID: // check for battery off/on line
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case DISCHARGING_ID:
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case CHARGING_ID:
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case BELOW_REMAINING_CAPACITY_ID:
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case SHUTDOWN_IMMINENT_ID:
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{
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pDevExt->m_pBattery->m_bIsCacheValid=FALSE;
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if (NT_SUCCESS (IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag))) {
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ntStatus = BatteryClassStatusNotify(
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pDevExt->m_pBattery->m_pBatteryClass);
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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}
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break;
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}
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default: // nothing to notify
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break;
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}
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return;
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}
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NTSTATUS
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HidBattQueryTag (
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IN PVOID pContext,
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OUT PULONG pulBatteryTag
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)
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{
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) pContext;
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if (!NT_SUCCESS(IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag)) )
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{
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return STATUS_NO_SUCH_DEVICE;
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}
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*pulBatteryTag = pDevExt->m_pBattery->m_Tag;
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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return STATUS_SUCCESS;
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}
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NTSTATUS
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HidBattSetStatusNotify (
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IN PVOID pContext,
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IN ULONG BatteryTag,
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IN PBATTERY_NOTIFY pBatteryNotify
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)
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{
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bool bResult;
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ULONG CentiAmpSec;
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ULONG ulValue;
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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HidBattPrint (HIDBATT_TRACE, ("HidBattSetStatusNotify \n"));
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) pContext;
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CBattery * pBattery = pDevExt->m_pBattery;
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HidBattPrint (HIDBATT_DEBUG, ("HidBattSetStatusNotify->PowerState = %x\n", pBatteryNotify->PowerState));
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HidBattPrint (HIDBATT_DEBUG, ("HidBattSetStatusNotify->LowCapacity = %x\n", pBatteryNotify->LowCapacity));
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HidBattPrint (HIDBATT_DEBUG, ("HidBattSetStatusNotify->HighCapacity = %x\n", pBatteryNotify->HighCapacity));
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if (!NT_SUCCESS(IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag)))
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{
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return STATUS_NO_SUCH_DEVICE;
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}
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if (pBattery->m_Tag != BatteryTag) {
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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return STATUS_NO_SUCH_DEVICE;
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}
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if ((pBatteryNotify->HighCapacity == BATTERY_UNKNOWN_CAPACITY) ||
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(pBatteryNotify->LowCapacity == BATTERY_UNKNOWN_CAPACITY)) {
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HidBattPrint (HIDBATT_DEBUG, ("HidBattSetStatusNotify failing because of BATTERY_UNKNOWN_CAPACITY.\n"));
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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return STATUS_NOT_SUPPORTED;
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}
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// first check for relative or absolute
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if(pBattery->m_bRelative)
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{
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ulValue = pBatteryNotify->LowCapacity; // done
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} else
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{
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// first check if setting to zero so that can skip below formula
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if(pBatteryNotify->LowCapacity == 0)
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{
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ulValue = 0;
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} else
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{
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// first must covert value to whatever is being used by this HID device.
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// currently we assume either MilliVolts consistant with battery class or
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// AmpSecs consistant with power spec
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ULONG ulUnit = pBattery->GetUnit(REMAINING_CAPACITY_INDEX);
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if(ulUnit)
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{
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short sExponent;
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ULONG lMilliVolts;
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long milliWattHours,CentiWattHours,CentiWattSecs;
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sExponent = pBattery->GetExponent(REMAINING_CAPACITY_INDEX);
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// conversion from millWattHours to AmpSecs
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// formula = mWHs / 1000 / 3600 / volts ^ exponent correction
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lMilliVolts = pBattery->m_BatteryStatus.Voltage; // stored as MilliVolts
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if (lMilliVolts == 0) {
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HidBattPrint (HIDBATT_ERROR,
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("HidBattSetStatusNotify: Error: voltage = 0, fudging with 24V.\n"));
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lMilliVolts = 24000;
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}
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milliWattHours = pBatteryNotify->LowCapacity;
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CentiWattHours = milliWattHours /10;
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CentiWattSecs = CentiWattHours / 3600;
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CentiAmpSec = (CentiWattSecs *1000)/ lMilliVolts;
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ulValue = CorrectExponent(CentiAmpSec,-2,sExponent);
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} else
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{
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ulValue = pBatteryNotify->LowCapacity;
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}
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} // end if LowCapacity
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} // end if relative
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// now set low
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bResult = pBattery->GetSetValue(REMAINING_CAPACITY_LIMIT_INDEX,&ulValue,TRUE);
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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return bResult ? STATUS_SUCCESS : STATUS_UNSUCCESSFUL;
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}
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NTSTATUS
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HidBattDisableStatusNotify (
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IN PVOID pContext
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)
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{
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) pContext;
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pDevExt->m_pBattery->m_pBatteryNotify = NULL; // remove notify procedure
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return STATUS_SUCCESS;
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}
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/*++
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Routine Description:
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Called by the class driver to retrieve the batteries current status
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The battery class driver will serialize all requests it issues to
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the miniport for a given battery.
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Arguments:
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Context - Miniport context value for battery
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BatteryTag - Tag of current battery
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BatteryStatus - Pointer to structure to return the current battery status
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Return Value:
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Success if there is a battery currently installed, else no such device.
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--*/
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NTSTATUS
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HidBattQueryStatus (
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IN PVOID pContext,
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IN ULONG BatteryTag,
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OUT PBATTERY_STATUS pBatteryStatus
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)
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{
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) pContext;
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NTSTATUS ntStatus;
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HidBattPrint (HIDBATT_TRACE, ("HidBattQueryStatus - Tag (%d)\n",
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BatteryTag));
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if (!NT_SUCCESS(IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag)) )
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{
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return STATUS_NO_SUCH_DEVICE;
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}
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if ((BatteryTag == BATTERY_TAG_INVALID) || (pDevExt->m_pBattery->m_Tag == BATTERY_TAG_INVALID)) {
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ntStatus = STATUS_NO_SUCH_DEVICE;
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} else {
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RtlZeroMemory (pBatteryStatus, sizeof(BATTERY_STATUS));
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ntStatus = pDevExt->m_pBattery->RefreshStatus();
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if (NT_SUCCESS(ntStatus)) {
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RtlCopyMemory (pBatteryStatus, &pDevExt->m_pBattery->m_BatteryStatus, sizeof(BATTERY_STATUS));
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HidBattPrint (HIDBATT_DATA, ("HidBattQueryStatus - Data (%08x)(%08x)(%08x)(%08x)\n",
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pBatteryStatus->PowerState,
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pBatteryStatus->Capacity,
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pBatteryStatus->Rate,
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pBatteryStatus->Voltage ));
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} else {
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ntStatus = STATUS_NO_SUCH_DEVICE;
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HidBattPrint (HIDBATT_DATA, ("HidBattQueryStatus - Error\n" ));
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}
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}
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IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
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return ntStatus;
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}
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/*++
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Routine Description:
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Called by the class driver to retrieve battery information
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The battery class driver will serialize all requests it issues to
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the miniport for a given battery.
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We return invalid parameter when we can't handle a request for a
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specific level of information. This is defined in the battery class spec.
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Arguments:
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Context - Miniport context value for battery
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BatteryTag - Tag of current battery
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Level - type of information required
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AtRate - Optional Parameter
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Buffer - Location for the information
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BufferLength - Length in bytes of the buffer
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ReturnedLength - Length in bytes of the returned data
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Return Value:
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Success if there is a battery currently installed, else no such device.
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--*/
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NTSTATUS
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HidBattQueryInformation (
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IN PVOID Context,
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IN ULONG BatteryTag,
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IN BATTERY_QUERY_INFORMATION_LEVEL Level,
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IN LONG AtRate OPTIONAL,
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OUT PVOID Buffer,
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IN ULONG BufferLength,
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OUT PULONG ReturnedLength
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)
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{
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CBatteryDevExt * pDevExt = (CBatteryDevExt *) Context;
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ULONG ulResult;
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NTSTATUS ntStatus;
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PVOID pReturnBuffer;
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ULONG ulReturnBufferLength;
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WCHAR scratchBuffer[MAX_BATTERY_STRING_SIZE];
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WCHAR buffer2[MAX_BATTERY_STRING_SIZE];
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UNICODE_STRING tmpUnicodeString;
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UNICODE_STRING unicodeString;
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ANSI_STRING ansiString;
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bool bResult;
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BATTERY_REMAINING_SCALE ScalePtr[2];
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ULONG ulReturn,ulNewValue;
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ULONG ulEstTimeStub = 5;
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HIDDebugBreak(HIDBATT_BREAK_ALWAYS);
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HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Tag (%d)\n",
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|
BatteryTag));
|
||
|
|
|
||
|
|
|
||
|
|
if (!NT_SUCCESS(IoAcquireRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag)) )
|
||
|
|
{
|
||
|
|
return STATUS_NO_SUCH_DEVICE;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// If caller has the wrong ID give an error
|
||
|
|
//
|
||
|
|
|
||
|
|
if (BatteryTag == BATTERY_TAG_INVALID ||
|
||
|
|
pDevExt->m_pBattery->m_Tag == BATTERY_TAG_INVALID ||
|
||
|
|
BatteryTag != pDevExt->m_pBattery->m_Tag)
|
||
|
|
{
|
||
|
|
IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
|
||
|
|
return STATUS_NO_SUCH_DEVICE;
|
||
|
|
}
|
||
|
|
|
||
|
|
ulResult = 0;
|
||
|
|
pReturnBuffer = NULL;
|
||
|
|
ulReturnBufferLength = 0;
|
||
|
|
ntStatus = STATUS_SUCCESS;
|
||
|
|
CUString cUniqueID;
|
||
|
|
SHORT sExponent;
|
||
|
|
char * pTemp;
|
||
|
|
//
|
||
|
|
// Get the info requested
|
||
|
|
//
|
||
|
|
|
||
|
|
switch (Level) {
|
||
|
|
case BatteryInformation:
|
||
|
|
//
|
||
|
|
// This data structure is populated by CmBattVerifyStaticInfo
|
||
|
|
//
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Battery Info\n"));
|
||
|
|
pReturnBuffer = (PVOID) &pDevExt->m_pBattery->m_BatteryInfo;
|
||
|
|
ulReturnBufferLength = sizeof (pDevExt->m_pBattery->m_BatteryInfo);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryGranularityInformation:
|
||
|
|
//
|
||
|
|
// Get the granularity from the static info structure
|
||
|
|
// This data structure is populated by CmBattVerifyStaticInfo
|
||
|
|
//
|
||
|
|
{
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Granularity\n"));
|
||
|
|
bResult = pDevExt->m_pBattery->GetSetValue(GRANULARITY1_INDEX, &ulReturn,FALSE);
|
||
|
|
if(!pDevExt->m_pBattery->m_bRelative)
|
||
|
|
{
|
||
|
|
// convert from amps to watts
|
||
|
|
sExponent = pDevExt->m_pBattery->GetExponent(GRANULARITY1_INDEX);
|
||
|
|
ulNewValue = CorrectExponent(ulReturn,sExponent,-2);
|
||
|
|
ulReturn= CentiAmpSecsToMilliWattHours(ulNewValue,pDevExt->m_pBattery->m_BatteryStatus.Voltage);
|
||
|
|
}
|
||
|
|
|
||
|
|
ScalePtr[0].Granularity = bResult ? ulReturn : 0;
|
||
|
|
bResult = pDevExt->m_pBattery->GetSetValue(GRANULARITY2_INDEX, &ulReturn,FALSE);
|
||
|
|
if(!pDevExt->m_pBattery->m_bRelative)
|
||
|
|
{
|
||
|
|
// convert from amps to watts
|
||
|
|
sExponent = pDevExt->m_pBattery->GetExponent(GRANULARITY2_INDEX);
|
||
|
|
ulNewValue = CorrectExponent(ulReturn,sExponent,-2);
|
||
|
|
ulReturn= CentiAmpSecsToMilliWattHours(ulNewValue,pDevExt->m_pBattery->m_BatteryStatus.Voltage);
|
||
|
|
}
|
||
|
|
ScalePtr[1].Granularity = bResult ? ulReturn : 0;
|
||
|
|
bResult = pDevExt->m_pBattery->GetSetValue(WARNING_CAPACITY_LIMIT_INDEX, &ulReturn,FALSE);
|
||
|
|
if(!pDevExt->m_pBattery->m_bRelative)
|
||
|
|
{
|
||
|
|
// convert from amps to watts
|
||
|
|
sExponent = pDevExt->m_pBattery->GetExponent(WARNING_CAPACITY_LIMIT_INDEX);
|
||
|
|
ulNewValue = CorrectExponent(ulReturn,sExponent,-2);
|
||
|
|
ulReturn= CentiAmpSecsToMilliWattHours(ulNewValue,pDevExt->m_pBattery->m_BatteryStatus.Voltage);
|
||
|
|
}
|
||
|
|
ScalePtr[0].Capacity = bResult ? ulReturn : 0;
|
||
|
|
bResult = pDevExt->m_pBattery->GetSetValue(DESIGN_CAPACITY_INDEX, &ulReturn,FALSE);
|
||
|
|
if(!pDevExt->m_pBattery->m_bRelative)
|
||
|
|
{
|
||
|
|
// convert from amps to watts
|
||
|
|
sExponent = pDevExt->m_pBattery->GetExponent(DESIGN_CAPACITY_INDEX);
|
||
|
|
ulNewValue = CorrectExponent(ulReturn,sExponent,-2);
|
||
|
|
ulReturn= CentiAmpSecsToMilliWattHours(ulNewValue,pDevExt->m_pBattery->m_BatteryStatus.Voltage);
|
||
|
|
}
|
||
|
|
ScalePtr[1].Capacity = bResult ? ulReturn : 0;
|
||
|
|
|
||
|
|
pReturnBuffer = ScalePtr;
|
||
|
|
ulReturnBufferLength = 2 * sizeof (BATTERY_REMAINING_SCALE);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryTemperature:
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Temperature\n"));
|
||
|
|
ntStatus = STATUS_INVALID_DEVICE_REQUEST;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryEstimatedTime:
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Estimated time\n"));
|
||
|
|
bResult = pDevExt->m_pBattery->GetSetValue(RUNTIME_TO_EMPTY_INDEX, &ulReturn,FALSE);
|
||
|
|
|
||
|
|
if(!bResult)
|
||
|
|
{
|
||
|
|
ntStatus = STATUS_INVALID_DEVICE_REQUEST;
|
||
|
|
} else
|
||
|
|
{
|
||
|
|
SHORT exponent;
|
||
|
|
|
||
|
|
exponent = pDevExt->m_pBattery->GetExponent(RUNTIME_TO_EMPTY_INDEX);
|
||
|
|
ulReturn = CorrectExponent (ulReturn, exponent, 0);
|
||
|
|
|
||
|
|
pReturnBuffer = &ulReturn;
|
||
|
|
ulReturnBufferLength = sizeof (ULONG);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryDeviceName:
|
||
|
|
//
|
||
|
|
// Model Number must be returned as a wide string
|
||
|
|
//
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Device Name\n"));
|
||
|
|
if(pDevExt->m_pBattery->m_pProduct)
|
||
|
|
{
|
||
|
|
pReturnBuffer = pDevExt->m_pBattery->m_pProduct->m_String.Buffer;
|
||
|
|
ulReturnBufferLength = pDevExt->m_pBattery->m_pProduct->m_String.Length;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryManufactureDate:
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Mfr Date\n"));
|
||
|
|
if(!pDevExt->m_pBattery->m_ManufactureDate.Day)
|
||
|
|
{
|
||
|
|
ntStatus = STATUS_INVALID_DEVICE_REQUEST;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
pReturnBuffer = &pDevExt->m_pBattery->m_ManufactureDate;
|
||
|
|
ulReturnBufferLength = sizeof(pDevExt->m_pBattery->m_ManufactureDate);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryManufactureName:
|
||
|
|
//
|
||
|
|
// Oem Info must be returned as wide string
|
||
|
|
//
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Mfr Name\n"));
|
||
|
|
if(pDevExt->m_pBattery->m_pManufacturer)
|
||
|
|
{
|
||
|
|
pReturnBuffer = pDevExt->m_pBattery->m_pManufacturer->m_String.Buffer;
|
||
|
|
ulReturnBufferLength = pDevExt->m_pBattery->m_pManufacturer->m_String.Length;
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BatteryUniqueID:
|
||
|
|
//
|
||
|
|
// Concatenate the serial #, manufacturer name, and Product //
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// start off with serial number
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Unique ID\n"));
|
||
|
|
if(pDevExt->m_pBattery->m_pSerialNumber) {
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Serial = %s\n", pDevExt->m_pBattery->m_pSerialNumber));
|
||
|
|
|
||
|
|
cUniqueID.Append(pDevExt->m_pBattery->m_pSerialNumber);
|
||
|
|
} else {
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Serial = NULL\n"));
|
||
|
|
CUString * pSTemp = new (NonPagedPool, HidBattTag) CUString(L"1000");
|
||
|
|
if (pSTemp) {
|
||
|
|
cUniqueID.Append(pSTemp);
|
||
|
|
delete pSTemp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(pDevExt->m_pBattery->m_pManufacturer)
|
||
|
|
cUniqueID.Append(pDevExt->m_pBattery->m_pManufacturer); // add mfr name
|
||
|
|
else
|
||
|
|
{
|
||
|
|
CUString * pSTemp = new (NonPagedPool, HidBattTag) CUString(L"Mfr");
|
||
|
|
if (pSTemp) {
|
||
|
|
cUniqueID.Append(pSTemp);
|
||
|
|
delete pSTemp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(pDevExt->m_pBattery->m_pProduct)
|
||
|
|
cUniqueID.Append(pDevExt->m_pBattery->m_pProduct); // add Product
|
||
|
|
else
|
||
|
|
{
|
||
|
|
CUString * pSTemp = new (NonPagedPool, HidBattTag) CUString(L"Prod");
|
||
|
|
if (pSTemp) {
|
||
|
|
cUniqueID.Append(pSTemp);
|
||
|
|
delete pSTemp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pReturnBuffer = cUniqueID.m_String.Buffer;
|
||
|
|
ulReturnBufferLength = cUniqueID.m_String.Length;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Default\n"));
|
||
|
|
ntStatus = STATUS_INVALID_PARAMETER;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Done, return buffer if needed
|
||
|
|
//
|
||
|
|
|
||
|
|
*ReturnedLength = ulReturnBufferLength;
|
||
|
|
if (BufferLength < ulReturnBufferLength) {
|
||
|
|
ntStatus = STATUS_BUFFER_TOO_SMALL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (NT_SUCCESS(ntStatus) && pReturnBuffer) {
|
||
|
|
RtlCopyMemory (Buffer, pReturnBuffer, ulReturnBufferLength); // Copy what's needed
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattQueryInformation - Status = %08x Buffer = %08x\n", ntStatus, *(PULONG)Buffer));
|
||
|
|
|
||
|
|
IoReleaseRemoveLock (&pDevExt->m_StopLock, (PVOID) HidBattTag);
|
||
|
|
|
||
|
|
return ntStatus;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
HidBattIoCompletion(
|
||
|
|
IN PDEVICE_OBJECT pDeviceObject,
|
||
|
|
IN PIRP pIrp,
|
||
|
|
IN PVOID pdoIoCompletedEvent
|
||
|
|
)
|
||
|
|
{
|
||
|
|
HidBattPrint (HIDBATT_TRACE, ("HidBattIoCompletion\n"));
|
||
|
|
KeSetEvent((KEVENT *) pdoIoCompletedEvent,0, FALSE);
|
||
|
|
return STATUS_MORE_PROCESSING_REQUIRED;
|
||
|
|
|
||
|
|
}
|