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/*++
Copyright (c) Microsoft Corporation All Rights Reserved
Module Name:
Device.c
Abstract:
This file handles device specific operations.
Environment:
Kernel mode only
--*/
#include "driver.h"
#include "Device.tmh"
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, DeviceQueryDeviceParameters)
#endif
#define STR_BAUDRATE L"BaudRateIndex"
VOID
DeviceQueryDeviceParameters(
_In_ WDFDRIVER _Driver
)
/*++
Routine Description:
Query driver's registry location for device specific parameter, such as baudrate.
HLM\system\CCS\Services\serialhcibus\Parameters\
KeyName/Type/value
Arguments:
_Driver - WDF Driver object
Return Value:
None
--*/
{
WDFKEY Key;
NTSTATUS Status;
UNICODE_STRING ValueName;
ULONG Value = 0;
PAGED_CODE();
Status = WdfDriverOpenParametersRegistryKey(_Driver,
GENERIC_READ,
WDF_NO_OBJECT_ATTRIBUTES,
&Key
);
if (NT_SUCCESS(Status)) {
RtlInitUnicodeString(&ValueName, STR_BAUDRATE);
Status = WdfRegistryQueryULong(Key, &ValueName, &Value);
if (NT_SUCCESS(Status)) {
// Vendor: can cache and use this values.
}
WdfRegistryClose(Key);
}
}
NTSTATUS
DeviceEnableWakeControl(
_In_ WDFDEVICE _Device,
_In_ SYSTEM_POWER_STATE _PowerState
)
/*++
Routine Description:
Vendor: This is a device specific function, and it arms the wake mechanism
for this driver to receive the wake signal. This could be using an
HOST_WAKE GPIO interrupt, or inband CTS/RTS mechanism.
Arguments:
_Device - WDF Device object
_PowerState - Context used for reading data from target UART device
Return Value:
NTSTATUS
--*/
{
UNREFERENCED_PARAMETER(_Device);
UNREFERENCED_PARAMETER(_PowerState);
return STATUS_SUCCESS;
}
VOID
DeviceDisableWakeControl(
WDFDEVICE _Device
)
/*++
Routine Description:
Vendor: This is a device specific function, and it disarms the wake mechanism
for this driver to receive the wake signal.
Arguments:
_Device - WDF Device object
Return Value:
VOID
--*/
{
UNREFERENCED_PARAMETER(_Device);
return;
}
BOOLEAN
DeviceInitialize(
_In_ PFDO_EXTENSION _FdoExtension,
_In_ WDFIOTARGET _IoTargetSerial,
_In_ WDFREQUEST _RequestSync,
_In_ BOOLEAN _IsUartReset
)
/*++
Routine Description:
This function perform device specific operations to intialize in order
to bring the device to operational state.
Arguments:
_FdoExtension - Function device object extension
_IoTargetSerial - IO Target to issue request to serial port
_RequestSync - A reuseable WDF Request to issue serial control
-IsUartReset - Is UART Reset is required
Return Value:
TRUE if initialization is completed and successful; FALSE otherwise.
--*/
{
UNREFERENCED_PARAMETER(_FdoExtension);
UNREFERENCED_PARAMETER(_IoTargetSerial);
UNREFERENCED_PARAMETER(_RequestSync);
UNREFERENCED_PARAMETER(_IsUartReset);
//
// Vendor specifc operation;
//
return TRUE;
}
NTSTATUS
DeviceEnable(
_In_ WDFDEVICE _Device,
_In_ BOOLEAN _IsEnabled
)
/*++
Routine Description:
This function enable/wake serial bus device.
Arguments:
_Device - Supplies a handle to the framework device object.
_IsEnabled - Boolean to enable or disable the BT device.
Return Value:
NTSTATUS code.
--*/
{
UNREFERENCED_PARAMETER(_Device);
UNREFERENCED_PARAMETER(_IsEnabled);
return STATUS_SUCCESS;
}
NTSTATUS
DevicePowerOn(
_In_ WDFDEVICE _Device
)
/*++
Routine Description:
This routine powers on the serial bus device
Arguments:
_Device - Supplies a handle to the framework device object.
Return Value:
NT status code.
--*/
{
UNREFERENCED_PARAMETER(_Device);
return STATUS_SUCCESS;
}
NTSTATUS
DevicePowerOff(
_In_ WDFDEVICE _Device
)
/*++
Routine Description:
This routine powers off the serial bus device
Arguments:
_Device - Supplies a handle to the framework device object.
Return Value:
NT status code.
--*/
{
UNREFERENCED_PARAMETER(_Device);
return STATUS_SUCCESS;
}
_Use_decl_annotations_
VOID
DeviceDoPLDR(
WDFDEVICE _Fdo
)
/*++
Routine Description:
This vendor-specific routine takes appropriate actions necessary to fully reset the device.
Arguments:
_Fdo - Framework device object representing the FDO.
Return Value:
VOID.
--*/
{
UNREFERENCED_PARAMETER(_Fdo);
}
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