104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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/*
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* UNIMODEM "Fakemodem" controllerless driver illustrative example
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*
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* (C) 2000 Microsoft Corporation
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* All Rights Reserved
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*
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*/
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#include "fakemodem.h"
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#ifdef FAKEMODEM_POWER
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VOID
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DevicePowerCompleteRoutine(
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PDEVICE_OBJECT DeviceObject,
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IN UCHAR MinorFunction,
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IN POWER_STATE PowerState,
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IN PVOID Context,
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IN PIO_STATUS_BLOCK IoStatus
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)
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{
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D_POWER(DbgPrint("FAKEMODEM: PoRequestPowerIrp: completion %08lx\n",IoStatus->Status);)
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return;
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}
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#endif
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NTSTATUS
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FakeModemPower(
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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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PDEVICE_EXTENSION deviceExtension = DeviceObject->DeviceExtension;
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PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation(Irp);
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NTSTATUS status;
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POWER_STATE PowerState;
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D_POWER(DbgPrint("FAKEMODEM: Power IRP, MN func=%d\n",irpSp->MinorFunction);)
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#ifdef FAKEMODEM_POWER
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switch (irpSp->MinorFunction) {
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case IRP_MN_SET_POWER:
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D_POWER(DbgPrint("FAKEMODEM: IRP_MN_SET_POWER, Type=%s, state=%d\n",irpSp->Parameters.Power.Type == SystemPowerState ? "SystemPowerState" : "DevicePowerState",irpSp->Parameters.Power.State.SystemState);)
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if (irpSp->Parameters.Power.Type == SystemPowerState) {
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//
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// system power state change
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//
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//
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// request the change in device power state based on systemstate map
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//
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PowerState.DeviceState=deviceExtension->SystemPowerStateMap[irpSp->Parameters.Power.State.SystemState];
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PoRequestPowerIrp( deviceExtension->Pdo, IRP_MN_SET_POWER,
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PowerState, DevicePowerCompleteRoutine, Irp, NULL);
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} else {
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//
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// changing device state
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//
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PoSetPowerState( deviceExtension->Pdo,
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irpSp->Parameters.Power.Type,
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irpSp->Parameters.Power.State);
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}
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break;
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case IRP_MN_QUERY_POWER:
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D_POWER(DbgPrint("FAKEMODEM: IRP_MN_QUERY_POWER, Type=%s, state=%d\n",irpSp->Parameters.Power.Type == SystemPowerState ? "SystemPowerState" : "DevicePowerState",irpSp->Parameters.Power.State.DeviceState);)
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Irp->IoStatus.Status = STATUS_SUCCESS;
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break;
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default:
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D_POWER(DbgPrint("FAKEMODEM: Power IRP, MN func=%d\n",irpSp->MinorFunction);)
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break;
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}
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#endif
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PoStartNextPowerIrp(Irp);
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IoSkipCurrentIrpStackLocation(Irp);
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status=PoCallDriver(deviceExtension->LowerDevice, Irp);
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return status;
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}
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