diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c | 186 |
1 files changed, 111 insertions, 75 deletions
diff --git a/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c b/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c index 47ec6b7b5e..a5ee00049e 100644 --- a/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c +++ b/IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/Serial.c @@ -144,18 +144,66 @@ SerialControllerDriverSupported ( EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_ISA_IO_PROTOCOL *IsaIo;
- UART_DEVICE_PATH UartNode;
+ UART_DEVICE_PATH *UartNode;
//
- // Ignore the RemainingDevicePath
+ // Check RemainingDevicePath validation
//
+ if (RemainingDevicePath != NULL) {
+ //
+ // Check if RemainingDevicePath is the End of Device Path Node,
+ // if yes, go on checking other conditions
+ //
+ if (!IsDevicePathEnd (RemainingDevicePath)) {
+ //
+ // If RemainingDevicePath isn't the End of Device Path Node,
+ // check its validation
+ //
+ Status = EFI_UNSUPPORTED;
+
+ UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;
+ if (UartNode->Header.Type != MESSAGING_DEVICE_PATH ||
+ UartNode->Header.SubType != MSG_UART_DP ||
+ sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) UartNode)
+ ) {
+ goto Error;
+ }
+
+ if (UartNode->BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {
+ goto Error;
+ }
+
+ if (UartNode->Parity < NoParity || UartNode->Parity > SpaceParity) {
+ goto Error;
+ }
+
+ if (UartNode->DataBits < 5 || UartNode->DataBits > 8) {
+ goto Error;
+ }
+
+ if (UartNode->StopBits < OneStopBit || UartNode->StopBits > TwoStopBits) {
+ goto Error;
+ }
+
+ if ((UartNode->DataBits == 5) && (UartNode->StopBits == TwoStopBits)) {
+ goto Error;
+ }
+
+ if ((UartNode->DataBits >= 6) && (UartNode->DataBits <= 8) && (UartNode->StopBits == OneFiveStopBits)) {
+ goto Error;
+ }
+
+ Status = EFI_SUCCESS;
+ }
+ }
+
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
Controller,
- &gEfiDevicePathProtocolGuid,
- (VOID **) &ParentDevicePath,
+ &gEfiIsaIoProtocolGuid,
+ (VOID **) &IsaIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
@@ -168,22 +216,27 @@ SerialControllerDriverSupported ( return Status;
}
+ //
+ // Close the I/O Abstraction(s) used to perform the supported test
+ //
gBS->CloseProtocol (
Controller,
- &gEfiDevicePathProtocolGuid,
+ &gEfiIsaIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
+ //
+ // Open the EFI Device Path protocol needed to perform the supported test
+ //
Status = gBS->OpenProtocol (
Controller,
- &gEfiIsaIoProtocolGuid,
- (VOID **) &IsaIo,
+ &gEfiDevicePathProtocolGuid,
+ (VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
-
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
@@ -200,57 +253,14 @@ SerialControllerDriverSupported ( Status = EFI_UNSUPPORTED;
goto Error;
}
- //
- // Make sure RemainingDevicePath is valid
- //
- if (RemainingDevicePath != NULL) {
- Status = EFI_UNSUPPORTED;
- CopyMem (
- &UartNode,
- (UART_DEVICE_PATH *) RemainingDevicePath,
- sizeof (UART_DEVICE_PATH)
- );
- if (UartNode.Header.Type != MESSAGING_DEVICE_PATH ||
- UartNode.Header.SubType != MSG_UART_DP ||
- sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &UartNode)
- ) {
- goto Error;
- }
-
- if (UartNode.BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {
- goto Error;
- }
-
- if (UartNode.Parity < NoParity || UartNode.Parity > SpaceParity) {
- goto Error;
- }
-
- if (UartNode.DataBits < 5 || UartNode.DataBits > 8) {
- goto Error;
- }
-
- if (UartNode.StopBits < OneStopBit || UartNode.StopBits > TwoStopBits) {
- goto Error;
- }
-
- if ((UartNode.DataBits == 5) && (UartNode.StopBits == TwoStopBits)) {
- goto Error;
- }
-
- if ((UartNode.DataBits >= 6) && (UartNode.DataBits <= 8) && (UartNode.StopBits == OneFiveStopBits)) {
- goto Error;
- }
-
- Status = EFI_SUCCESS;
- }
Error:
//
- // Close the I/O Abstraction(s) used to perform the supported test
+ // Close protocol, don't use device path protocol in the Support() function
//
gBS->CloseProtocol (
Controller,
- &gEfiIsaIoProtocolGuid,
+ &gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
@@ -281,11 +291,11 @@ SerialControllerDriverStart ( EFI_ISA_IO_PROTOCOL *IsaIo;
SERIAL_DEV *SerialDevice;
UINTN Index;
- UART_DEVICE_PATH Node;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;
UINTN EntryCount;
EFI_SERIAL_IO_PROTOCOL *SerialIo;
+ UART_DEVICE_PATH *UartNode;
SerialDevice = NULL;
//
@@ -328,9 +338,13 @@ SerialControllerDriverStart ( if (Status == EFI_ALREADY_STARTED) {
- if (RemainingDevicePath == NULL) {
+ if (RemainingDevicePath == NULL || IsDevicePathEnd (RemainingDevicePath)) {
+ //
+ // If RemainingDevicePath is NULL or is the End of Device Path Node
+ //
return EFI_SUCCESS;
}
+
//
// Make sure a child handle does not already exist. This driver can only
// produce one child per serial port.
@@ -357,24 +371,44 @@ SerialControllerDriverStart ( EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
- CopyMem (&Node, RemainingDevicePath, sizeof (UART_DEVICE_PATH));
+ UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;
Status = SerialIo->SetAttributes (
SerialIo,
- Node.BaudRate,
+ UartNode->BaudRate,
SerialIo->Mode->ReceiveFifoDepth,
SerialIo->Mode->Timeout,
- (EFI_PARITY_TYPE) Node.Parity,
- Node.DataBits,
- (EFI_STOP_BITS_TYPE) Node.StopBits
+ (EFI_PARITY_TYPE) UartNode->Parity,
+ UartNode->DataBits,
+ (EFI_STOP_BITS_TYPE) UartNode->StopBits
);
}
break;
}
}
+ FreePool (OpenInfoBuffer);
- gBS->FreePool (OpenInfoBuffer);
- return Status;
+ if (Index < EntryCount) {
+ //
+ // If gEfiSerialIoProtocolGuid is opened by one child device, return
+ //
+ return Status;
+ }
+ //
+ // If gEfiSerialIoProtocolGuid is not opened by any child device,
+ // go further to create child device handle based on RemainingDevicePath
+ //
}
+
+ if (RemainingDevicePath != NULL) {
+ if (IsDevicePathEnd (RemainingDevicePath)) {
+ //
+ // If RemainingDevicePath is the End of Device Path Node,
+ // skip enumerate any device and return EFI_SUCESSS
+ //
+ return EFI_SUCCESS;
+ }
+ }
+
//
// Initialize the serial device instance
//
@@ -388,6 +422,21 @@ SerialControllerDriverStart ( SerialDevice->IsaIo = IsaIo;
SerialDevice->ParentDevicePath = ParentDevicePath;
+ //
+ // Check if RemainingDevicePath is NULL,
+ // if yes, use the values from the gSerialDevTempate as no remaining device path was
+ // passed in.
+ //
+ if (RemainingDevicePath != NULL) {
+ //
+ // If RemainingDevicePath isn't NULL,
+ // match the configuration of the RemainingDevicePath. IsHandleSupported()
+ // already checked to make sure the RemainingDevicePath contains settings
+ // that we can support.
+ //
+ CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));
+ }
+
AddName (SerialDevice, IsaIo);
for (Index = 0; SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type != EfiIsaAcpiResourceEndOfList; Index++) {
@@ -414,19 +463,6 @@ SerialControllerDriverStart ( goto Error;
}
- if (RemainingDevicePath != NULL) {
- //
- // Match the configuration of the RemainingDevicePath. IsHandleSupported()
- // already checked to make sure the RemainingDevicePath contains settings
- // that we can support.
- //
- CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));
- } else {
- //
- // Use the values from the gSerialDevTempate as no remaining device path was
- // passed in.
- //
- }
//
// Build the device path by appending the UART node to the ParentDevicePath.
//The Uart setings are zero here, since SetAttribute() will update them to match
|