Nt32SerialIo driver was changed to produce the flow control device path node when the remaining device path contains such node. And it will return unsupported when receiving a remaining device path only contains UART node and it’s already produced the flow control node.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10352 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 214 insertions, 55 deletions

diff --git a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.c b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.c
index b2c9089..44bc510 100644
--- a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.c
+++ b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.c
@@ -62,6 +62,51 @@ EFI_DRIVER_BINDING_PROTOCOL gWinNtSerialIoDriverBinding = {
 UINT64 mBaudRateCurrentSupport[] = {50, 75, 110, 134, 150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 7200, 9600, 19200, 38400, 57600, 115200, SERIAL_PORT_MAX_BAUD_RATE + 1};

 

 /**

+  Check the device path node whether it's the Flow Control node or not.

+

+  @param[in] FlowControl    The device path node to be checked.

+  

+  @retval TRUE              It's the Flow Control node.

+  @retval FALSE             It's not.

+

+**/

+BOOLEAN

+IsUartFlowControlNode (

+  IN UART_FLOW_CONTROL_DEVICE_PATH *FlowControl

+  )

+{

+  return (BOOLEAN) (

+           (DevicePathType (FlowControl) == MESSAGING_DEVICE_PATH) &&

+           (DevicePathSubType (FlowControl) == MSG_VENDOR_DP) &&

+           (CompareGuid (&FlowControl->Guid, &gEfiUartDevicePathGuid))

+           );

+}

+

+/**

+  Check the device path node whether it contains Flow Control node or not.

+

+  @param[in] DevicePath     The device path to be checked.

+  

+  @retval TRUE              It contains the Flow Control node.

+  @retval FALSE             It doesn't.

+

+**/

+BOOLEAN

+ContainsFlowControl (

+  IN EFI_DEVICE_PATH_PROTOCOL      *DevicePath

+  )

+{

+  while (!IsDevicePathEnd (DevicePath)) {

+    if (IsUartFlowControlNode ((UART_FLOW_CONTROL_DEVICE_PATH *) DevicePath)) {

+      return TRUE;

+    }

+    DevicePath = NextDevicePathNode (DevicePath);

+  }

+

+  return FALSE;

+}

+

+/**

   The user Entry Point for module WinNtSerialIo. The user code starts with this function.

 

   @param[in] ImageHandle    The firmware allocated handle for the EFI image.  

@@ -121,10 +166,15 @@ Returns:
 // TODO:    EFI_SUCCESS - add return value to function comment

 // TODO:    EFI_SUCCESS - add return value to function comment

 {

-  EFI_STATUS                Status;

-  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath;

-  EFI_WIN_NT_IO_PROTOCOL    *WinNtIo;

-  UART_DEVICE_PATH          *UartNode;

+  EFI_STATUS                          Status;

+  EFI_DEVICE_PATH_PROTOCOL            *ParentDevicePath;

+  EFI_WIN_NT_IO_PROTOCOL              *WinNtIo;

+  UART_DEVICE_PATH                    *UartNode;

+  EFI_DEVICE_PATH_PROTOCOL            *DevicePath;

+  UART_FLOW_CONTROL_DEVICE_PATH       *FlowControlNode;

+  EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;

+  UINTN                               EntryCount;

+  UINTN                               Index;

 

   //

   // Check RemainingDevicePath validation

@@ -165,6 +215,17 @@ Returns:
       if ((UartNode->DataBits >= 6) && (UartNode->DataBits <= 8) && (UartNode->StopBits == OneFiveStopBits)) {

         goto Error;

       }

+

+      FlowControlNode = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (UartNode);

+      if (IsUartFlowControlNode (FlowControlNode)) {

+        //

+        // If the second node is Flow Control Node,

+        //   return error when it request other than hardware flow control.

+        //

+        if ((FlowControlNode->FlowControlMap & ~UART_FLOW_CONTROL_HARDWARE) != 0) {

+          goto Error;

+        }

+      }

     }

   }

 

@@ -180,7 +241,45 @@ Returns:
                   EFI_OPEN_PROTOCOL_BY_DRIVER

                   );

   if (Status == EFI_ALREADY_STARTED) {

-    return EFI_SUCCESS;

+    if (RemainingDevicePath == NULL || IsDevicePathEnd (RemainingDevicePath)) {

+      //

+      // If RemainingDevicePath is NULL or is the End of Device Path Node

+      //

+      return EFI_SUCCESS;

+    }

+    //

+    // When the driver has produced device path with flow control node but RemainingDevicePath only contains UART node,

+    //   return unsupported, and vice versa.

+    //

+    Status = gBS->OpenProtocolInformation (

+                    Handle,

+                    &gEfiWinNtIoProtocolGuid,

+                    &OpenInfoBuffer,

+                    &EntryCount

+                    );

+    if (EFI_ERROR (Status)) {

+      return Status;

+    }

+

+    for (Index = 0; Index < EntryCount; Index++) {

+      if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {

+        Status = gBS->OpenProtocol (

+                        OpenInfoBuffer[Index].ControllerHandle,

+                        &gEfiDevicePathProtocolGuid,

+                        (VOID **) &DevicePath,

+                        This->DriverBindingHandle,

+                        Handle,

+                        EFI_OPEN_PROTOCOL_GET_PROTOCOL

+                        );

+        if (!EFI_ERROR (Status) &&

+            (ContainsFlowControl (RemainingDevicePath) ^ ContainsFlowControl (DevicePath))) {

+          Status = EFI_UNSUPPORTED;

+        }

+        break;

+      }

+    }

+    FreePool (OpenInfoBuffer);

+    return Status;

   }

 

   if (EFI_ERROR (Status)) {

@@ -276,19 +375,23 @@ Returns:
   EFI_WIN_NT_IO_PROTOCOL              *WinNtIo;

   WIN_NT_SERIAL_IO_PRIVATE_DATA       *Private;

   HANDLE                              NtHandle;

-  UART_DEVICE_PATH                    Node;

+  UART_DEVICE_PATH                    UartNode;

   EFI_DEVICE_PATH_PROTOCOL            *ParentDevicePath;

   EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;

   UINTN                               EntryCount;

   UINTN                               Index;

   EFI_SERIAL_IO_PROTOCOL              *SerialIo;

-  UART_DEVICE_PATH                    *UartNode;

+  UART_DEVICE_PATH                    *Uart;

+  UINT32                              FlowControlMap;

+  UART_FLOW_CONTROL_DEVICE_PATH       *FlowControl;

+  EFI_DEVICE_PATH_PROTOCOL            *TempDevicePath;

+  UINT32                              Control;

 

   Private   = NULL;

   NtHandle  = INVALID_HANDLE_VALUE;

 

   //

-  // Grab the protocols we need

+  // Get the Parent Device Path

   //

   Status = gBS->OpenProtocol (

                   Handle,

@@ -348,7 +451,7 @@ Returns:
 

     Status = EFI_ALREADY_STARTED;

     for (Index = 0; Index < EntryCount; Index++) {

-      if (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {

+      if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {

         Status = gBS->OpenProtocol (

                         OpenInfoBuffer[Index].ControllerHandle,

                         &gEfiSerialIoProtocolGuid,

@@ -358,16 +461,34 @@ Returns:
                         EFI_OPEN_PROTOCOL_GET_PROTOCOL

                         );

         if (!EFI_ERROR (Status)) {

-          UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;

+          Uart   = (UART_DEVICE_PATH *) RemainingDevicePath;

           Status = SerialIo->SetAttributes (

-                              SerialIo,

-                              UartNode->BaudRate,

-                              SerialIo->Mode->ReceiveFifoDepth,

-                              SerialIo->Mode->Timeout,

-                              (EFI_PARITY_TYPE)UartNode->Parity,

-                              UartNode->DataBits,

-                              (EFI_STOP_BITS_TYPE)UartNode->StopBits

-                              );

+                               SerialIo,

+                               Uart->BaudRate,

+                               SerialIo->Mode->ReceiveFifoDepth,

+                               SerialIo->Mode->Timeout,

+                               (EFI_PARITY_TYPE) Uart->Parity,

+                               Uart->DataBits,

+                               (EFI_STOP_BITS_TYPE) Uart->StopBits

+                               );

+          FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (Uart);

+          if (!EFI_ERROR (Status) && IsUartFlowControlNode (FlowControl)) {

+            Status = SerialIo->GetControl (SerialIo, &Control);

+            if (!EFI_ERROR (Status)) {

+              if (FlowControl->FlowControlMap == UART_FLOW_CONTROL_HARDWARE) {

+                Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;

+              } else {

+                Control &= ~EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;

+              }

+              //

+              // Clear the bits that are not allowed to pass to SetControl

+              //

+              Control &= (EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY |

+                          EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE | EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE | 

+                          EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE);

+              Status = SerialIo->SetControl (SerialIo, Control);

+            }

+          }

         }

         break;

       }

@@ -377,16 +498,18 @@ Returns:
     return Status;

   }

 

+  FlowControl    = NULL;

+  FlowControlMap = 0;

   if (RemainingDevicePath == NULL) {

     //

     // Build the device path by appending the UART node to the ParentDevicePath

     // from the WinNtIo handle. The Uart setings are zero here, since

     // SetAttribute() will update them to match the default setings.

     //

-    ZeroMem (&Node, sizeof (UART_DEVICE_PATH));

-    Node.Header.Type     = MESSAGING_DEVICE_PATH;

-    Node.Header.SubType  = MSG_UART_DP;

-    SetDevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &Node, sizeof (UART_DEVICE_PATH));

+    ZeroMem (&UartNode, sizeof (UART_DEVICE_PATH));

+    UartNode.Header.Type     = MESSAGING_DEVICE_PATH;

+    UartNode.Header.SubType  = MSG_UART_DP;

+    SetDevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &UartNode, sizeof (UART_DEVICE_PATH));

 

   } else if (!IsDevicePathEnd (RemainingDevicePath)) {

     //

@@ -398,7 +521,13 @@ Returns:
     // already checked to make sure the RemainingDevicePath contains settings

     // that we can support.

     //

-    CopyMem (&Node, RemainingDevicePath, sizeof (UART_DEVICE_PATH));

+    CopyMem (&UartNode, RemainingDevicePath, sizeof (UART_DEVICE_PATH));

+    FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (RemainingDevicePath);

+    if (IsUartFlowControlNode (FlowControl)) {

+      FlowControlMap = FlowControl->FlowControlMap;

+    } else {

+      FlowControl    = NULL;

+    }

 

   } else {

     //

@@ -447,12 +576,12 @@ Returns:
 

   Private->SoftwareLoopbackEnable = FALSE;

   Private->HardwareLoopbackEnable = FALSE;

-  Private->HardwareFlowControl    = FALSE;

+  Private->HardwareFlowControl    = (BOOLEAN) (FlowControlMap == UART_FLOW_CONTROL_HARDWARE);

   Private->Fifo.First             = 0;

   Private->Fifo.Last              = 0;

   Private->Fifo.Surplus           = SERIAL_MAX_BUFFER_SIZE;

 

-  CopyMem (&Private->UartDevicePath, &Node, sizeof (UART_DEVICE_PATH));

+  CopyMem (&Private->UartDevicePath, &UartNode, sizeof (UART_DEVICE_PATH));

 

   AddUnicodeString2 (

     "eng",

@@ -488,6 +617,19 @@ Returns:
                           ParentDevicePath,

                           (EFI_DEVICE_PATH_PROTOCOL *) &Private->UartDevicePath

                           );

+  //

+  // Only produce the FlowControl node when remaining device path has it

+  //

+  if (FlowControl != NULL) {

+    TempDevicePath = Private->DevicePath;

+    if (TempDevicePath != NULL) {

+      Private->DevicePath = AppendDevicePathNode (

+                              TempDevicePath,

+                              (EFI_DEVICE_PATH_PROTOCOL *) FlowControl

+                              );

+      FreePool (TempDevicePath);

+    }

+  }

   if (Private->DevicePath == NULL) {

     Status = EFI_OUT_OF_RESOURCES;

     goto Error;

@@ -791,7 +933,7 @@ Returns:
   COMMTIMEOUTS                  PortTimeOuts;

   DWORD                         ConvertedTime;

   BOOL                          Result;

-  EFI_DEVICE_PATH_PROTOCOL      *NewDevicePath;

+  UART_DEVICE_PATH              *Uart;

   EFI_TPL                       Tpl;

 

   Private = WIN_NT_SERIAL_IO_PRIVATE_DATA_FROM_THIS (This);

@@ -841,7 +983,7 @@ Returns:
       break;

       }

   }

-  	

+

   if ((ReceiveFifoDepth < 1) || (ReceiveFifoDepth > SERIAL_PORT_MAX_RECEIVE_FIFO_DEPTH)) {

     return EFI_INVALID_PARAMETER;

   }

@@ -976,37 +1118,25 @@ Returns:
   Private->UartDevicePath.Parity    = (UINT8) Parity;

   Private->UartDevicePath.StopBits  = (UINT8) StopBits;

 

-  NewDevicePath = AppendDevicePathNode (

-                    Private->ParentDevicePath,

-                    (EFI_DEVICE_PATH_PROTOCOL *) &Private->UartDevicePath

-                    );

-  if (NewDevicePath == NULL) {

-    gBS->RestoreTPL (Tpl);

-    return EFI_DEVICE_ERROR;

-  }

-

+  Status = EFI_SUCCESS;

   if (Private->Handle != NULL) {

+    Uart = (UART_DEVICE_PATH *) (

+             (UINTN) Private->DevicePath

+             + GetDevicePathSize (Private->ParentDevicePath)

+             - END_DEVICE_PATH_LENGTH

+             );

+    CopyMem (Uart, &Private->UartDevicePath, sizeof (UART_DEVICE_PATH));

     Status = gBS->ReinstallProtocolInterface (

                     Private->Handle,

                     &gEfiDevicePathProtocolGuid,

                     Private->DevicePath,

-                    NewDevicePath

+                    Private->DevicePath

                     );

-    if (EFI_ERROR (Status)) {

-      gBS->RestoreTPL (Tpl);

-      return Status;

-    }

-  }

-

-  if (Private->DevicePath != NULL) {

-    FreePool (Private->DevicePath);

   }

 

-  Private->DevicePath = NewDevicePath;

-

   gBS->RestoreTPL (Tpl);

 

-  return EFI_SUCCESS;

+  return Status;

 }

 

 EFI_STATUS

@@ -1038,6 +1168,8 @@ Returns:
   BOOL                          Result;

   DCB                           Dcb;

   EFI_TPL                       Tpl;

+  UART_FLOW_CONTROL_DEVICE_PATH *FlowControl;

+  EFI_STATUS                    Status;

 

   //

   // first determine the parameter is invalid

@@ -1099,9 +1231,32 @@ Returns:
     return EFI_DEVICE_ERROR;

   }

 

+  Status = EFI_SUCCESS;

+  if (Private->Handle != NULL) {

+    FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) (

+                    (UINTN) Private->DevicePath

+                    + GetDevicePathSize (Private->ParentDevicePath)

+                    - END_DEVICE_PATH_LENGTH

+                    + sizeof (UART_DEVICE_PATH)

+                    );

+    if (IsUartFlowControlNode (FlowControl) &&

+        ((FlowControl->FlowControlMap == UART_FLOW_CONTROL_HARDWARE) ^ Private->HardwareFlowControl)) {

+      //

+      // Flow Control setting is changed, need to reinstall device path protocol

+      //

+      FlowControl->FlowControlMap = Private->HardwareFlowControl ? UART_FLOW_CONTROL_HARDWARE : 0;

+      Status = gBS->ReinstallProtocolInterface (

+                      Private->Handle,

+                      &gEfiDevicePathProtocolGuid,

+                      Private->DevicePath,

+                      Private->DevicePath

+                      );

+    }

+  }

+

   gBS->RestoreTPL (Tpl);

 

-  return EFI_SUCCESS;

+  return Status;

 }

 

 EFI_STATUS

diff --git a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.h b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.h
index 348cca8..53fd459 100644
--- a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.h
+++ b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIo.h
@@ -120,12 +120,15 @@ extern EFI_COMPONENT_NAME2_PROTOCOL  gWinNtSerialIoComponentName2;
 #define SERIAL_PARITY_DEFAULT   DefaultParity

 #define SERIAL_STOPBITS_DEFAULT DefaultStopBits

 

-#define SERIAL_CONTROL_MASK     (EFI_SERIAL_CLEAR_TO_SEND       | \

-                                 EFI_SERIAL_DATA_SET_READY      | \

-                                 EFI_SERIAL_RING_INDICATE       | \

-                                 EFI_SERIAL_CARRIER_DETECT      | \

-                                 EFI_SERIAL_REQUEST_TO_SEND     | \

-                                 EFI_SERIAL_DATA_TERMINAL_READY | \

+#define SERIAL_CONTROL_MASK     (EFI_SERIAL_CLEAR_TO_SEND                | \

+                                 EFI_SERIAL_DATA_SET_READY               | \

+                                 EFI_SERIAL_RING_INDICATE                | \

+                                 EFI_SERIAL_CARRIER_DETECT               | \

+                                 EFI_SERIAL_REQUEST_TO_SEND              | \

+                                 EFI_SERIAL_DATA_TERMINAL_READY          | \

+                                 EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE     | \

+                                 EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE     | \

+                                 EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE | \

                                  EFI_SERIAL_INPUT_BUFFER_EMPTY)

 

 #define ConvertBaud2Nt(x)       (DWORD) x

diff --git a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIoDxe.inf b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIoDxe.inf
index 9be5441..d4574ba 100644
--- a/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIoDxe.inf
+++ b/Nt32Pkg/WinNtSerialIoDxe/WinNtSerialIoDxe.inf
@@ -53,6 +53,7 @@
 

 [Guids]

   gEfiWinNtSerialPortGuid                       # ALWAYS_CONSUMED

+  gEfiUartDevicePathGuid

 

 [Protocols]

   gEfiSerialIoProtocolGuid                      # PROTOCOL BY_START