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|
/*++
Copyright (c) Microsoft Corporation
Module Name:
registry.c
Abstract:
This module contains the code that is used to get values from the
registry and to manipulate entries in the registry.
Environment:
Kernel mode
--*/
#include "precomp.h"
#if defined(EVENT_TRACING)
#include "registry.tmh"
#endif
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,SerialGetConfigDefaults)
#pragma alloc_text(PAGESRP0,SerialGetRegistryKeyValue)
#pragma alloc_text(PAGESRP0,SerialPutRegistryKeyValue)
#pragma alloc_text(PAGESRP0,SerialGetFdoRegistryKeyValue)
#endif // ALLOC_PRAGMA
#define PARAMATER_NAME_LEN 80
NTSTATUS
SerialGetConfigDefaults(
IN PSERIAL_FIRMWARE_DATA DriverDefaultsPtr,
IN WDFDRIVER Driver
)
/*++
Routine Description:
This routine reads the default configuration data from the
registry for the serial driver.
It also builds fields in the registry for several configuration
options if they don't exist.
Arguments:
DriverDefaultsPtr - Pointer to a structure that will contain
the default configuration values.
RegistryPath - points to the entry for this driver in the
current control set of the registry.
Return Value:
STATUS_SUCCESS if we got the defaults, otherwise we failed.
The only way to fail this call is if the STATUS_INSUFFICIENT_RESOURCES.
--*/
{
NTSTATUS status = STATUS_SUCCESS; // return value
WDFKEY hKey;
DECLARE_UNICODE_STRING_SIZE(valueName,PARAMATER_NAME_LEN);
status = WdfDriverOpenParametersRegistryKey(Driver,
STANDARD_RIGHTS_ALL,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (!NT_SUCCESS (status)) {
return status;
}
status = RtlUnicodeStringPrintf(&valueName,L"BreakOnEntry");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->ShouldBreakOnEntry);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->ShouldBreakOnEntry = 0;
}
status = RtlUnicodeStringPrintf(&valueName,L"DebugLevel");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->DebugLevel);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->DebugLevel = 0;
}
status = RtlUnicodeStringPrintf(&valueName,L"ForceFifoEnable");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->ForceFifoEnableDefault);
if (!NT_SUCCESS (status)) {
//
// If it isn't then write out values so that it could
// be adjusted later.
//
DriverDefaultsPtr->ForceFifoEnableDefault = SERIAL_FORCE_FIFO_DEFAULT;
status = WdfRegistryAssignULong(hKey,
&valueName,
DriverDefaultsPtr->ForceFifoEnableDefault
);
if (!NT_SUCCESS (status)) {
goto End;
}
}
status = RtlUnicodeStringPrintf(&valueName,L"RxFIFO");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->RxFIFODefault);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->RxFIFODefault = SERIAL_RX_FIFO_DEFAULT;
status = WdfRegistryAssignULong(hKey,
&valueName,
DriverDefaultsPtr->RxFIFODefault
);
if (!NT_SUCCESS (status)) {
goto End;
}
}
status = RtlUnicodeStringPrintf(&valueName,L"TxFIFO");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->TxFIFODefault);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->TxFIFODefault = SERIAL_TX_FIFO_DEFAULT;
status = WdfRegistryAssignULong(hKey,
&valueName,
DriverDefaultsPtr->TxFIFODefault
);
if (!NT_SUCCESS (status)) {
goto End;
}
}
status = RtlUnicodeStringPrintf(&valueName,L"PermitShare");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->PermitShareDefault);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->PermitShareDefault = SERIAL_PERMIT_SHARE_DEFAULT;
status = WdfRegistryAssignULong(hKey,
&valueName,
DriverDefaultsPtr->PermitShareDefault
);
if (!NT_SUCCESS (status)) {
goto End;
}
}
status = RtlUnicodeStringPrintf(&valueName,L"LogFifo");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->LogFifoDefault);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->LogFifoDefault = SERIAL_LOG_FIFO_DEFAULT;
status = WdfRegistryAssignULong(hKey,
&valueName,
DriverDefaultsPtr->LogFifoDefault
);
if (!NT_SUCCESS (status)) {
goto End;
}
DriverDefaultsPtr->LogFifoDefault = 1;
}
status = RtlUnicodeStringPrintf(&valueName,L"UartRemovalDetect");
if (!NT_SUCCESS (status)) {
goto End;
}
status = WdfRegistryQueryULong (hKey,
&valueName,
&DriverDefaultsPtr->UartRemovalDetect);
if (!NT_SUCCESS (status)) {
DriverDefaultsPtr->UartRemovalDetect = 0;
}
End:
WdfRegistryClose(hKey);
return (status);
}
BOOLEAN
SerialGetRegistryKeyValue(
IN WDFDEVICE WdfDevice,
_In_ PCWSTR Name,
OUT PULONG Value
)
/*++
Routine Description:
Can be used to read any REG_DWORD registry value stored
under Device Parameter.
Arguments:
FdoData - pointer to the device extension
Name - Name of the registry value
Value -
Return Value:
TRUE if successful
FALSE if not present/error in reading registry
--*/
{
WDFKEY hKey = NULL;
NTSTATUS status;
BOOLEAN retValue = FALSE;
UNICODE_STRING valueName;
PAGED_CODE();
SerialDbgPrintEx(TRACE_LEVEL_VERBOSE, DBG_PNP, ">SerialGetRegistryKeyValue(XXX)\n");
*Value = 0;
status = WdfDeviceOpenRegistryKey(WdfDevice,
PLUGPLAY_REGKEY_DEVICE,
STANDARD_RIGHTS_ALL,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (NT_SUCCESS (status)) {
RtlInitUnicodeString(&valueName,Name);
status = WdfRegistryQueryULong (hKey,
&valueName,
Value);
if (NT_SUCCESS (status)) {
retValue = TRUE;
}
WdfRegistryClose(hKey);
}
SerialDbgPrintEx(TRACE_LEVEL_VERBOSE, DBG_PNP, "<--SerialGetRegistryKeyValue %ws %d \n",
Name, *Value);
return retValue;
}
#define PARAMATER_NAME_LEN 80
BOOLEAN
SerialPutRegistryKeyValue(
IN WDFDEVICE WdfDevice,
_In_ PCWSTR Name,
IN ULONG Value
)
/*++
Routine Description:
Can be used to write any REG_DWORD registry value stored
under Device Parameter.
Arguments:
Return Value:
TRUE - if write is successful
FALSE - otherwise
--*/
{
WDFKEY hKey = NULL;
NTSTATUS status;
BOOLEAN retValue = FALSE;
UNICODE_STRING valueName;
PAGED_CODE();
SerialDbgPrintEx(TRACE_LEVEL_VERBOSE, DBG_PNP, "Entered PciDrvWriteRegistryValue\n");
//
// write the value out to the registry
//
status = WdfDeviceOpenRegistryKey(WdfDevice,
PLUGPLAY_REGKEY_DEVICE,
STANDARD_RIGHTS_ALL,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (NT_SUCCESS (status)) {
RtlInitUnicodeString(&valueName,Name);
status = WdfRegistryAssignULong (hKey,
&valueName,
Value
);
if (NT_SUCCESS (status)) {
retValue = TRUE;
}
WdfRegistryClose(hKey);
}
return retValue;
}
BOOLEAN
SerialGetFdoRegistryKeyValue(
IN PWDFDEVICE_INIT DeviceInit,
_In_ PCWSTR Name,
OUT PULONG Value
)
/*++
Routine Description:
Can be used to read any REG_DWORD registry value stored
under Device Parameter.
Arguments:
FdoData - pointer to the device extension
Name - Name of the registry value
Value -
Return Value:
TRUE if successful
FALSE if not present/error in reading registry
--*/
{
WDFKEY hKey = NULL;
NTSTATUS status;
BOOLEAN retValue = FALSE;
UNICODE_STRING valueName;
PAGED_CODE();
SerialDbgPrintEx(TRACE_LEVEL_VERBOSE, DBG_PNP,
"-->SerialGetFdoRegistryKeyValue\n");
*Value = 0;
status = WdfFdoInitOpenRegistryKey(DeviceInit,
PLUGPLAY_REGKEY_DEVICE,
STANDARD_RIGHTS_ALL,
WDF_NO_OBJECT_ATTRIBUTES,
&hKey);
if (NT_SUCCESS (status)) {
RtlInitUnicodeString(&valueName,Name);
status = WdfRegistryQueryULong (hKey, &valueName, Value);
if (NT_SUCCESS (status)) {
retValue = TRUE;
}
WdfRegistryClose(hKey);
}
SerialDbgPrintEx(TRACE_LEVEL_VERBOSE, DBG_PNP,
"<--SerialGetFdoRegistryKeyValue %ws %d \n",
Name, *Value);
return retValue;
}
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