-/**@file\r
+/** @file\r
Serial driver for standard UARTS on an ISA bus.\r
\r
- Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
+Copyright (c) 2006 - 2010, Intel Corporation<BR>\r
+All rights reserved. This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
},\r
FALSE,\r
FALSE,\r
- UART16550A,\r
+ Uart16550A,\r
NULL\r
};\r
\r
/**\r
Check to see if this driver supports the given controller\r
\r
- @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
- @param Controller - The handle of the controller to test.\r
- @param RemainingDevicePath - A pointer to the remaining portion of a device path.\r
+ @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
+ @param Controller The handle of the controller to test.\r
+ @param RemainingDevicePath A pointer to the remaining portion of a device path.\r
\r
- @return EFI_SUCCESS - This driver can support the given controller\r
+ @return EFI_SUCCESS This driver can support the given controller\r
\r
**/\r
EFI_STATUS\r
EFI_STATUS Status;\r
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
EFI_ISA_IO_PROTOCOL *IsaIo;\r
- UART_DEVICE_PATH UartNode;\r
+ UART_DEVICE_PATH *UartNode;\r
\r
//\r
- // Ignore the RemainingDevicePath\r
+ // Check RemainingDevicePath validation\r
//\r
+ if (RemainingDevicePath != NULL) {\r
+ //\r
+ // Check if RemainingDevicePath is the End of Device Path Node, \r
+ // if yes, go on checking other conditions\r
+ //\r
+ if (!IsDevicePathEnd (RemainingDevicePath)) {\r
+ //\r
+ // If RemainingDevicePath isn't the End of Device Path Node,\r
+ // check its validation\r
+ //\r
+ Status = EFI_UNSUPPORTED;\r
+\r
+ UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;\r
+ if (UartNode->Header.Type != MESSAGING_DEVICE_PATH ||\r
+ UartNode->Header.SubType != MSG_UART_DP ||\r
+ sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) UartNode)\r
+ ) {\r
+ goto Error;\r
+ }\r
+ \r
+ if (UartNode->BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {\r
+ goto Error;\r
+ }\r
+ \r
+ if (UartNode->Parity < NoParity || UartNode->Parity > SpaceParity) {\r
+ goto Error;\r
+ }\r
+ \r
+ if (UartNode->DataBits < 5 || UartNode->DataBits > 8) {\r
+ goto Error;\r
+ }\r
+ \r
+ if (UartNode->StopBits < OneStopBit || UartNode->StopBits > TwoStopBits) {\r
+ goto Error;\r
+ }\r
+ \r
+ if ((UartNode->DataBits == 5) && (UartNode->StopBits == TwoStopBits)) {\r
+ goto Error;\r
+ }\r
+ \r
+ if ((UartNode->DataBits >= 6) && (UartNode->DataBits <= 8) && (UartNode->StopBits == OneFiveStopBits)) {\r
+ goto Error;\r
+ }\r
+ \r
+ Status = EFI_SUCCESS;\r
+ }\r
+ }\r
+\r
//\r
// Open the IO Abstraction(s) needed to perform the supported test\r
//\r
Status = gBS->OpenProtocol (\r
Controller,\r
- &gEfiDevicePathProtocolGuid,\r
- (VOID **) &ParentDevicePath,\r
+ &gEfiIsaIoProtocolGuid,\r
+ (VOID **) &IsaIo,\r
This->DriverBindingHandle,\r
Controller,\r
EFI_OPEN_PROTOCOL_BY_DRIVER\r
return Status;\r
}\r
\r
+ //\r
+ // Close the I/O Abstraction(s) used to perform the supported test\r
+ //\r
gBS->CloseProtocol (\r
Controller,\r
- &gEfiDevicePathProtocolGuid,\r
+ &gEfiIsaIoProtocolGuid,\r
This->DriverBindingHandle,\r
Controller\r
);\r
\r
+ //\r
+ // Open the EFI Device Path protocol needed to perform the supported test\r
+ //\r
Status = gBS->OpenProtocol (\r
Controller,\r
- &gEfiIsaIoProtocolGuid,\r
- (VOID **) &IsaIo,\r
+ &gEfiDevicePathProtocolGuid,\r
+ (VOID **) &ParentDevicePath,\r
This->DriverBindingHandle,\r
Controller,\r
EFI_OPEN_PROTOCOL_BY_DRIVER\r
);\r
-\r
if (Status == EFI_ALREADY_STARTED) {\r
return EFI_SUCCESS;\r
}\r
Status = EFI_UNSUPPORTED;\r
goto Error;\r
}\r
- //\r
- // Make sure RemainingDevicePath is valid\r
- //\r
- if (RemainingDevicePath != NULL) {\r
- Status = EFI_UNSUPPORTED;\r
- CopyMem (\r
- &UartNode,\r
- (UART_DEVICE_PATH *) RemainingDevicePath,\r
- sizeof (UART_DEVICE_PATH)\r
- );\r
- if (UartNode.Header.Type != MESSAGING_DEVICE_PATH ||\r
- UartNode.Header.SubType != MSG_UART_DP ||\r
- sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &UartNode)\r
- ) {\r
- goto Error;\r
- }\r
-\r
- if (UartNode.BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {\r
- goto Error;\r
- }\r
-\r
- if (UartNode.Parity < NoParity || UartNode.Parity > SpaceParity) {\r
- goto Error;\r
- }\r
-\r
- if (UartNode.DataBits < 5 || UartNode.DataBits > 8) {\r
- goto Error;\r
- }\r
-\r
- if (UartNode.StopBits < OneStopBit || UartNode.StopBits > TwoStopBits) {\r
- goto Error;\r
- }\r
-\r
- if ((UartNode.DataBits == 5) && (UartNode.StopBits == TwoStopBits)) {\r
- goto Error;\r
- }\r
-\r
- if ((UartNode.DataBits >= 6) && (UartNode.DataBits <= 8) && (UartNode.StopBits == OneFiveStopBits)) {\r
- goto Error;\r
- }\r
-\r
- Status = EFI_SUCCESS;\r
- }\r
\r
Error:\r
//\r
- // Close the I/O Abstraction(s) used to perform the supported test\r
+ // Close protocol, don't use device path protocol in the Support() function\r
//\r
gBS->CloseProtocol (\r
Controller,\r
- &gEfiIsaIoProtocolGuid,\r
+ &gEfiDevicePathProtocolGuid,\r
This->DriverBindingHandle,\r
Controller\r
);\r
/**\r
Start to management the controller passed in\r
\r
- @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
- @param Controller - The handle of the controller to test.\r
- @param RemainingDevicePath - A pointer to the remaining portion of a device path.\r
+ @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
+ @param Controller The handle of the controller to test.\r
+ @param RemainingDevicePath A pointer to the remaining portion of a device path.\r
\r
- @return EFI_SUCCESS - Driver is started successfully\r
+ @return EFI_SUCCESS Driver is started successfully\r
\r
**/\r
EFI_STATUS\r
EFI_ISA_IO_PROTOCOL *IsaIo;\r
SERIAL_DEV *SerialDevice;\r
UINTN Index;\r
- UART_DEVICE_PATH Node;\r
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r
UINTN EntryCount;\r
EFI_SERIAL_IO_PROTOCOL *SerialIo;\r
+ UART_DEVICE_PATH *UartNode;\r
\r
SerialDevice = NULL;\r
//\r
\r
if (Status == EFI_ALREADY_STARTED) {\r
\r
- if (RemainingDevicePath == NULL) {\r
+ if (RemainingDevicePath == NULL || IsDevicePathEnd (RemainingDevicePath)) {\r
+ //\r
+ // If RemainingDevicePath is NULL or is the End of Device Path Node\r
+ //\r
return EFI_SUCCESS;\r
}\r
+\r
//\r
// Make sure a child handle does not already exist. This driver can only\r
// produce one child per serial port.\r
\r
Status = EFI_ALREADY_STARTED;\r
for (Index = 0; Index < EntryCount; Index++) {\r
- if (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {\r
+ if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r
Status = gBS->OpenProtocol (\r
OpenInfoBuffer[Index].ControllerHandle,\r
&gEfiSerialIoProtocolGuid,\r
EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
);\r
if (!EFI_ERROR (Status)) {\r
- CopyMem (&Node, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r
+ UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;\r
Status = SerialIo->SetAttributes (\r
SerialIo,\r
- Node.BaudRate,\r
+ UartNode->BaudRate,\r
SerialIo->Mode->ReceiveFifoDepth,\r
SerialIo->Mode->Timeout,\r
- (EFI_PARITY_TYPE) Node.Parity,\r
- Node.DataBits,\r
- (EFI_STOP_BITS_TYPE) Node.StopBits\r
+ (EFI_PARITY_TYPE) UartNode->Parity,\r
+ UartNode->DataBits,\r
+ (EFI_STOP_BITS_TYPE) UartNode->StopBits\r
);\r
}\r
break;\r
}\r
}\r
\r
- gBS->FreePool (OpenInfoBuffer);\r
+ FreePool (OpenInfoBuffer);\r
return Status;\r
}\r
+\r
+ if (RemainingDevicePath != NULL) {\r
+ if (IsDevicePathEnd (RemainingDevicePath)) {\r
+ //\r
+ // If RemainingDevicePath is the End of Device Path Node,\r
+ // skip enumerate any device and return EFI_SUCESSS\r
+ // \r
+ return EFI_SUCCESS;\r
+ }\r
+ }\r
+\r
//\r
// Initialize the serial device instance\r
//\r
SerialDevice->IsaIo = IsaIo;\r
SerialDevice->ParentDevicePath = ParentDevicePath;\r
\r
- ADD_SERIAL_NAME (SerialDevice, IsaIo);\r
+ //\r
+ // Check if RemainingDevicePath is NULL, \r
+ // if yes, use the values from the gSerialDevTempate as no remaining device path was\r
+ // passed in.\r
+ //\r
+ if (RemainingDevicePath != NULL) {\r
+ //\r
+ // If RemainingDevicePath isn't NULL, \r
+ // match the configuration of the RemainingDevicePath. IsHandleSupported()\r
+ // already checked to make sure the RemainingDevicePath contains settings\r
+ // that we can support.\r
+ //\r
+ CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r
+ }\r
+\r
+ AddName (SerialDevice, IsaIo);\r
\r
for (Index = 0; SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type != EfiIsaAcpiResourceEndOfList; Index++) {\r
if (SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type == EfiIsaAcpiResourceIo) {\r
goto Error;\r
}\r
\r
- if (RemainingDevicePath != NULL) {\r
- //\r
- // Match the configuration of the RemainingDevicePath. IsHandleSupported()\r
- // already checked to make sure the RemainingDevicePath contains settings\r
- // that we can support.\r
- //\r
- CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r
- } else {\r
- //\r
- // Use the values from the gSerialDevTempate as no remaining device path was\r
- // passed in.\r
- //\r
- }\r
//\r
- // Build the device path by appending the UART node to the ParentDevicePath\r
- // from the WinNtIo handle. The Uart setings are zero here, since\r
- // SetAttribute() will update them to match the current setings.\r
+ // Build the device path by appending the UART node to the ParentDevicePath.\r
+ //The Uart setings are zero here, since SetAttribute() will update them to match \r
+ // the default setings.\r
//\r
SerialDevice->DevicePath = AppendDevicePathNode (\r
ParentDevicePath,\r
This->DriverBindingHandle,\r
Controller\r
);\r
- if (SerialDevice) {\r
- if (SerialDevice->DevicePath) {\r
+ if (SerialDevice != NULL) {\r
+ if (SerialDevice->DevicePath != NULL) {\r
gBS->FreePool (SerialDevice->DevicePath);\r
}\r
\r
/**\r
Disconnect this driver with the controller, uninstall related protocol instance\r
\r
- @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
- @param Controller - The handle of the controller to test.\r
- @param NumberOfChildren - Number of child device.\r
- @param ChildHandleBuffer - A pointer to the remaining portion of a device path.\r
+ @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
+ @param Controller The handle of the controller to test.\r
+ @param NumberOfChildren Number of child device.\r
+ @param ChildHandleBuffer A pointer to the remaining portion of a device path.\r
\r
- @retval EFI_SUCCESS - Operation successfully\r
- @retval EFI_DEVICE_ERROR - Cannot stop the driver successfully\r
+ @retval EFI_SUCCESS Operation successfully\r
+ @retval EFI_DEVICE_ERROR Cannot stop the driver successfully\r
\r
**/\r
EFI_STATUS\r
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
);\r
} else {\r
- if (SerialDevice->DevicePath) {\r
+ if (SerialDevice->DevicePath != NULL) {\r
gBS->FreePool (SerialDevice->DevicePath);\r
}\r
\r
}\r
\r
/**\r
- Detect whether specific FIFO is full or not\r
+ Detect whether specific FIFO is full or not.\r
\r
- @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r
+ @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r
\r
@return whether specific FIFO is full or not\r
\r
}\r
\r
/**\r
- Detect whether specific FIFO is empty or not\r
-\r
+ Detect whether specific FIFO is empty or not.\r
\r
- @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r
+ @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r
\r
@return whether specific FIFO is empty or not\r
\r
}\r
\r
/**\r
- Add data to specific FIFO\r
+ Add data to specific FIFO.\r
\r
- @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r
- @param Data - the data added to FIFO\r
+ @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r
+ @param Data the data added to FIFO\r
\r
- @retval EFI_SUCCESS - Add data to specific FIFO successfully\r
- @retval EFI_OUT_OF_RESOURCE - Failed to add data because FIFO is already full\r
+ @retval EFI_SUCCESS Add data to specific FIFO successfully\r
+ @retval EFI_OUT_OF_RESOURCE Failed to add data because FIFO is already full\r
\r
**/\r
EFI_STATUS\r
}\r
\r
/**\r
- Remove data from specific FIFO\r
+ Remove data from specific FIFO.\r
\r
- @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r
- @param Data - the data removed from FIFO\r
+ @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r
+ @param Data the data removed from FIFO\r
\r
- @retval EFI_SUCCESS - Remove data from specific FIFO successfully\r
- @retval EFI_OUT_OF_RESOURCE - Failed to remove data because FIFO is empty\r
+ @retval EFI_SUCCESS Remove data from specific FIFO successfully\r
+ @retval EFI_OUT_OF_RESOURCE Failed to remove data because FIFO is empty\r
\r
**/\r
EFI_STATUS\r
/**\r
Reads and writes all avaliable data.\r
\r
- @param SerialDevice - The device to flush\r
+ @param SerialDevice The device to flush\r
\r
- @retval EFI_SUCCESS - Data was read/written successfully.\r
- @retval EFI_OUT_OF_RESOURCE - Failed because software receive FIFO is full. Note, when\r
+ @retval EFI_SUCCESS Data was read/written successfully.\r
+ @retval EFI_OUT_OF_RESOURCE Failed because software receive FIFO is full. Note, when\r
this happens, pending writes are not done.\r
\r
**/\r
} while (!IsaSerialFifoEmpty (&SerialDevice->Transmit));\r
} else {\r
ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r
+ //\r
+ // For full handshake flow control, tell the peer to send data\r
+ // if receive buffer is available.\r
+ //\r
+ if (SerialDevice->HardwareFlowControl &&\r
+ !FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)&&\r
+ !ReceiveFifoFull\r
+ ) {\r
+ Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
+ Mcr.Bits.Rts = 1;\r
+ WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
+ }\r
do {\r
Lsr.Data = READ_LSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
\r
//\r
// Flush incomming data to prevent a an overrun during a long write\r
//\r
- if (Lsr.Bits.DR && !ReceiveFifoFull) {\r
+ if ((Lsr.Bits.Dr == 1) && !ReceiveFifoFull) {\r
ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r
if (!ReceiveFifoFull) {\r
- if (Lsr.Bits.FIFOE || Lsr.Bits.OE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r
+ if (Lsr.Bits.FIFOe == 1 || Lsr.Bits.Oe == 1 || Lsr.Bits.Pe == 1 || Lsr.Bits.Fe == 1 || Lsr.Bits.Bi == 1) {\r
REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
EFI_ERROR_CODE,\r
EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r
SerialDevice->DevicePath\r
);\r
- if (Lsr.Bits.FIFOE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r
+ if (Lsr.Bits.FIFOe == 1 || Lsr.Bits.Pe == 1|| Lsr.Bits.Fe == 1 || Lsr.Bits.Bi == 1) {\r
Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
continue;\r
}\r
}\r
- //\r
- // Make sure the receive data will not be missed, Assert DTR\r
- //\r
- if (SerialDevice->HardwareFlowControl) {\r
- Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.DTRC &= 0;\r
- WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
- }\r
\r
Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
\r
+ IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r
+ \r
//\r
- // Deassert DTR\r
+ // For full handshake flow control, if receive buffer full\r
+ // tell the peer to stop sending data.\r
//\r
- if (SerialDevice->HardwareFlowControl) {\r
- Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.DTRC |= 1;\r
+ if (SerialDevice->HardwareFlowControl &&\r
+ !FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake) &&\r
+ IsaSerialFifoFull (&SerialDevice->Receive)\r
+ ) {\r
+ Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
+ Mcr.Bits.Rts = 0;\r
WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
}\r
\r
- IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r
\r
continue;\r
} else {\r
//\r
// Do the write\r
//\r
- if (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r
+ if (Lsr.Bits.Thre == 1 && !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r
//\r
// Make sure the transmit data will not be missed\r
//\r
if (SerialDevice->HardwareFlowControl) {\r
//\r
- // Send RTS\r
+ // For half handshake flow control assert RTS before sending.\r
//\r
- Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.RTS |= 1;\r
- WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
+ if (FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)) {\r
+ Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
+ Mcr.Bits.Rts= 0;\r
+ WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
+ }\r
//\r
// Wait for CTS\r
//\r
TimeOut = 0;\r
Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- while (!Msr.Bits.CTS) {\r
+ while ((Msr.Bits.Dcd == 1) && ((Msr.Bits.Cts == 0) || FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {\r
gBS->Stall (TIMEOUT_STALL_INTERVAL);\r
TimeOut++;\r
if (TimeOut > 5) {\r
Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
}\r
\r
- if (Msr.Bits.CTS) {\r
+ if ((Msr.Bits.Dcd == 0) && ((Msr.Bits.Cts == 1) || FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {\r
IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r
WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r
}\r
- }\r
- //\r
- // write the data out\r
- //\r
- if (!SerialDevice->HardwareFlowControl) {\r
- IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r
- WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r
- }\r
- //\r
- // Make sure the transmit data will not be missed\r
- //\r
- if (SerialDevice->HardwareFlowControl) {\r
+\r
//\r
- // Assert RTS\r
+ // For half handshake flow control, tell DCE we are done.\r
//\r
- Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.RTS &= 0;\r
- WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
+ if (FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)) {\r
+ Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
+ Mcr.Bits.Rts = 1;\r
+ WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
+ }\r
+ } else {\r
+ IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r
+ WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r
}\r
}\r
- } while (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit));\r
+ } while (Lsr.Bits.Thre == 1 && !IsaSerialFifoEmpty (&SerialDevice->Transmit));\r
}\r
\r
return EFI_SUCCESS;\r
// Interface Functions\r
//\r
/**\r
- Reset serial device\r
+ Reset serial device.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
\r
- @retval EFI_SUCCESS - Reset successfully\r
- @retval EFI_DEVICE_ERROR - Failed to reset\r
+ @retval EFI_SUCCESS Reset successfully\r
+ @retval EFI_DEVICE_ERROR Failed to reset\r
\r
**/\r
EFI_STATUS\r
// Make sure DLAB is 0.\r
//\r
Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Lcr.Bits.DLAB = 0;\r
+ Lcr.Bits.DLab = 0;\r
WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r
\r
//\r
// Turn off all interrupts\r
//\r
Ier.Data = READ_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Ier.Bits.RAVIE = 0;\r
- Ier.Bits.THEIE = 0;\r
- Ier.Bits.RIE = 0;\r
- Ier.Bits.MIE = 0;\r
+ Ier.Bits.Ravie = 0;\r
+ Ier.Bits.Theie = 0;\r
+ Ier.Bits.Rie = 0;\r
+ Ier.Bits.Mie = 0;\r
WRITE_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress, Ier.Data);\r
\r
//\r
// Disable the FIFO.\r
//\r
- Fcr.Bits.TRFIFOE = 0;\r
+ Fcr.Bits.TrFIFOE = 0;\r
WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r
\r
//\r
// Turn off loopback and disable device interrupt.\r
//\r
Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.OUT1 = 0;\r
- Mcr.Bits.OUT2 = 0;\r
- Mcr.Bits.LME = 0;\r
+ Mcr.Bits.Out1 = 0;\r
+ Mcr.Bits.Out2 = 0;\r
+ Mcr.Bits.Lme = 0;\r
WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
\r
//\r
//\r
// for 16550A enable FIFO, 16550 disable FIFO\r
//\r
- Fcr.Bits.TRFIFOE = 1;\r
- Fcr.Bits.RESETRF = 1;\r
- Fcr.Bits.RESETTF = 1;\r
+ Fcr.Bits.TrFIFOE = 1;\r
+ Fcr.Bits.ResetRF = 1;\r
+ Fcr.Bits.ResetTF = 1;\r
WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r
\r
//\r
}\r
\r
/**\r
- Set new attributes to a serial device\r
+ Set new attributes to a serial device.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
- @param BaudRate - The baudrate of the serial device\r
- @param ReceiveFifoDepth - The depth of receive FIFO buffer\r
- @param Timeout - The request timeout for a single char\r
- @param Parity - The type of parity used in serial device\r
- @param DataBits - Number of databits used in serial device\r
- @param StopBits - Number of stopbits used in serial device\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param BaudRate The baudrate of the serial device\r
+ @param ReceiveFifoDepth The depth of receive FIFO buffer\r
+ @param Timeout The request timeout for a single char\r
+ @param Parity The type of parity used in serial device\r
+ @param DataBits Number of databits used in serial device\r
+ @param StopBits Number of stopbits used in serial device\r
\r
- @retval EFI_SUCCESS - The new attributes were set\r
- @retval EFI_INVALID_PARAMETERS - One or more attributes have an unsupported value\r
- @retval EFI_UNSUPPORTED - Data Bits can not set to 5 or 6\r
- @retval EFI_DEVICE_ERROR - The serial device is not functioning correctly (no return)\r
+ @retval EFI_SUCCESS The new attributes were set\r
+ @retval EFI_INVALID_PARAMETERS One or more attributes have an unsupported value\r
+ @retval EFI_UNSUPPORTED Data Bits can not set to 5 or 6\r
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly (no return)\r
\r
**/\r
EFI_STATUS\r
if ((StopBits < OneStopBit) || (StopBits > TwoStopBits)) {\r
return EFI_INVALID_PARAMETER;\r
}\r
- //\r
- // for DataBits = 5, StopBits can not set TwoStopBits\r
- //\r
- // if ((DataBits == 5) && (StopBits == TwoStopBits)) {\r
- // return EFI_INVALID_PARAMETER;\r
- // }\r
+\r
//\r
// for DataBits = 6,7,8, StopBits can not set OneFiveStopBits\r
//\r
((UINT32) BaudRate * 16),\r
&Remained\r
);\r
- if (Remained) {\r
+ if (Remained != 0) {\r
Divisor += 1;\r
}\r
\r
- if ((Divisor == 0) || (Divisor & 0xffff0000)) {\r
+ if ((Divisor == 0) || ((Divisor & 0xffff0000) != 0)) {\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
// Put serial port on Divisor Latch Mode\r
//\r
Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Lcr.Bits.DLAB = 1;\r
+ Lcr.Bits.DLab = 1;\r
WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r
\r
//\r
//\r
// Put serial port back in normal mode and set remaining attributes.\r
//\r
- Lcr.Bits.DLAB = 0;\r
+ Lcr.Bits.DLab = 0;\r
\r
switch (Parity) {\r
case NoParity:\r
- Lcr.Bits.PAREN = 0;\r
- Lcr.Bits.EVENPAR = 0;\r
- Lcr.Bits.STICPAR = 0;\r
+ Lcr.Bits.ParEn = 0;\r
+ Lcr.Bits.EvenPar = 0;\r
+ Lcr.Bits.SticPar = 0;\r
break;\r
\r
case EvenParity:\r
- Lcr.Bits.PAREN = 1;\r
- Lcr.Bits.EVENPAR = 1;\r
- Lcr.Bits.STICPAR = 0;\r
+ Lcr.Bits.ParEn = 1;\r
+ Lcr.Bits.EvenPar = 1;\r
+ Lcr.Bits.SticPar = 0;\r
break;\r
\r
case OddParity:\r
- Lcr.Bits.PAREN = 1;\r
- Lcr.Bits.EVENPAR = 0;\r
- Lcr.Bits.STICPAR = 0;\r
+ Lcr.Bits.ParEn = 1;\r
+ Lcr.Bits.EvenPar = 0;\r
+ Lcr.Bits.SticPar = 0;\r
break;\r
\r
case SpaceParity:\r
- Lcr.Bits.PAREN = 1;\r
- Lcr.Bits.EVENPAR = 1;\r
- Lcr.Bits.STICPAR = 1;\r
+ Lcr.Bits.ParEn = 1;\r
+ Lcr.Bits.EvenPar = 1;\r
+ Lcr.Bits.SticPar = 1;\r
break;\r
\r
case MarkParity:\r
- Lcr.Bits.PAREN = 1;\r
- Lcr.Bits.EVENPAR = 0;\r
- Lcr.Bits.STICPAR = 1;\r
+ Lcr.Bits.ParEn = 1;\r
+ Lcr.Bits.EvenPar = 0;\r
+ Lcr.Bits.SticPar = 1;\r
break;\r
\r
default:\r
\r
switch (StopBits) {\r
case OneStopBit:\r
- Lcr.Bits.STOPB = 0;\r
+ Lcr.Bits.StopB = 0;\r
break;\r
\r
case OneFiveStopBits:\r
case TwoStopBits:\r
- Lcr.Bits.STOPB = 1;\r
+ Lcr.Bits.StopB = 1;\r
break;\r
\r
default:\r
//\r
// DataBits\r
//\r
- Lcr.Bits.SERIALDB = (UINT8) ((DataBits - 5) & 0x03);\r
+ Lcr.Bits.SerialDB = (UINT8) ((DataBits - 5) & 0x03);\r
WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r
\r
//\r
}\r
}\r
\r
- if (SerialDevice->DevicePath) {\r
+ if (SerialDevice->DevicePath != NULL) {\r
gBS->FreePool (SerialDevice->DevicePath);\r
}\r
\r
}\r
\r
/**\r
- Set Control Bits\r
+ Set Control Bits.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
- @param Control - Control bits that can be settable\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param Control Control bits that can be settable\r
\r
- @retval EFI_SUCCESS - New Control bits were set successfully\r
- @retval EFI_UNSUPPORTED - The Control bits wanted to set are not supported\r
+ @retval EFI_SUCCESS New Control bits were set successfully\r
+ @retval EFI_UNSUPPORTED The Control bits wanted to set are not supported\r
\r
**/\r
EFI_STATUS\r
//\r
// first determine the parameter is invalid\r
//\r
- if (Control & 0xffff8ffc) {\r
+ if ((Control & 0xffff8ffc) != 0) {\r
return EFI_UNSUPPORTED;\r
}\r
\r
Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r
\r
Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
- Mcr.Bits.DTRC = 0;\r
- Mcr.Bits.RTS = 0;\r
- Mcr.Bits.LME = 0;\r
+ Mcr.Bits.DtrC = 0;\r
+ Mcr.Bits.Rts = 0;\r
+ Mcr.Bits.Lme = 0;\r
SerialDevice->SoftwareLoopbackEnable = FALSE;\r
SerialDevice->HardwareFlowControl = FALSE;\r
\r
- if (Control & EFI_SERIAL_DATA_TERMINAL_READY) {\r
- Mcr.Bits.DTRC = 1;\r
+ if ((Control & EFI_SERIAL_DATA_TERMINAL_READY) == EFI_SERIAL_DATA_TERMINAL_READY) {\r
+ Mcr.Bits.DtrC = 1;\r
}\r
\r
- if (Control & EFI_SERIAL_REQUEST_TO_SEND) {\r
- Mcr.Bits.RTS = 1;\r
+ if ((Control & EFI_SERIAL_REQUEST_TO_SEND) == EFI_SERIAL_REQUEST_TO_SEND) {\r
+ Mcr.Bits.Rts = 1;\r
}\r
\r
- if (Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r
- Mcr.Bits.LME = 1;\r
+ if ((Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) == EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r
+ Mcr.Bits.Lme = 1;\r
}\r
\r
- if (Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r
+ if ((Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) == EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r
SerialDevice->HardwareFlowControl = TRUE;\r
}\r
\r
WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r
\r
- if (Control & EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) {\r
+ if ((Control & EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) == EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) {\r
SerialDevice->SoftwareLoopbackEnable = TRUE;\r
}\r
\r
}\r
\r
/**\r
- Get ControlBits\r
+ Get ControlBits.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
- @param Control - Control signals of the serial device\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param Control Control signals of the serial device\r
\r
- @retval EFI_SUCCESS - Get Control signals successfully\r
+ @retval EFI_SUCCESS Get Control signals successfully\r
\r
**/\r
EFI_STATUS\r
//\r
Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
\r
- if (Msr.Bits.CTS) {\r
+ if (Msr.Bits.Cts == 1) {\r
*Control |= EFI_SERIAL_CLEAR_TO_SEND;\r
}\r
\r
- if (Msr.Bits.DSR) {\r
+ if (Msr.Bits.Dsr == 1) {\r
*Control |= EFI_SERIAL_DATA_SET_READY;\r
}\r
\r
- if (Msr.Bits.RI) {\r
+ if (Msr.Bits.Ri == 1) {\r
*Control |= EFI_SERIAL_RING_INDICATE;\r
}\r
\r
- if (Msr.Bits.DCD) {\r
+ if (Msr.Bits.Dcd == 1) {\r
*Control |= EFI_SERIAL_CARRIER_DETECT;\r
}\r
//\r
//\r
Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r
\r
- if (Mcr.Bits.DTRC) {\r
+ if (Mcr.Bits.DtrC == 1) {\r
*Control |= EFI_SERIAL_DATA_TERMINAL_READY;\r
}\r
\r
- if (Mcr.Bits.RTS) {\r
+ if (Mcr.Bits.Rts == 1) {\r
*Control |= EFI_SERIAL_REQUEST_TO_SEND;\r
}\r
\r
- if (Mcr.Bits.LME) {\r
+ if (Mcr.Bits.Lme == 1) {\r
*Control |= EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE;\r
}\r
\r
}\r
\r
/**\r
- Write the specified number of bytes to serial device\r
+ Write the specified number of bytes to serial device.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
- @param BufferSize - On input the size of Buffer, on output the amount of\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param BufferSize On input the size of Buffer, on output the amount of\r
data actually written\r
- @param Buffer - The buffer of data to write\r
+ @param Buffer The buffer of data to write\r
\r
- @retval EFI_SUCCESS - The data were written successfully\r
- @retval EFI_DEVICE_ERROR - The device reported an error\r
- @retval EFI_TIMEOUT - The write operation was stopped due to timeout\r
+ @retval EFI_SUCCESS The data were written successfully\r
+ @retval EFI_DEVICE_ERROR The device reported an error\r
+ @retval EFI_TIMEOUT The write operation was stopped due to timeout\r
\r
**/\r
EFI_STATUS\r
return EFI_SUCCESS;\r
}\r
\r
- if (!Buffer) {\r
+ if (Buffer == NULL) {\r
REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
EFI_ERROR_CODE,\r
EFI_P_EC_OUTPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r
}\r
\r
/**\r
- Read the specified number of bytes from serial device\r
+ Read the specified number of bytes from serial device.\r
\r
- @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r
- @param BufferSize - On input the size of Buffer, on output the amount of\r
- data returned in buffer\r
- @param Buffer - The buffer to return the data into\r
+ @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r
+ @param BufferSize On input the size of Buffer, on output the amount of\r
+ data returned in buffer\r
+ @param Buffer The buffer to return the data into\r
\r
- @retval EFI_SUCCESS - The data were read successfully\r
- @retval EFI_DEVICE_ERROR - The device reported an error\r
- @retval EFI_TIMEOUT - The read operation was stopped due to timeout\r
+ @retval EFI_SUCCESS The data were read successfully\r
+ @retval EFI_DEVICE_ERROR The device reported an error\r
+ @retval EFI_TIMEOUT The read operation was stopped due to timeout\r
\r
**/\r
EFI_STATUS\r
return EFI_SUCCESS;\r
}\r
\r
- if (!Buffer) {\r
+ if (Buffer == NULL) {\r
return EFI_DEVICE_ERROR;\r
}\r
\r
}\r
\r
/**\r
- Use scratchpad register to test if this serial port is present\r
+ Use scratchpad register to test if this serial port is present.\r
\r
- @param SerialDevice - Pointer to serial device structure\r
+ @param SerialDevice Pointer to serial device structure\r
\r
@return if this serial port is present\r
**/\r
}\r
\r
/**\r
- Use IsaIo protocol to read serial port\r
+ Use IsaIo protocol to read serial port.\r
\r
- @param IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r
- @param BaseAddress - Serial port register group base address\r
- @param Offset - Offset in register group\r
+ @param IsaIo Pointer to EFI_ISA_IO_PROTOCOL instance\r
+ @param BaseAddress Serial port register group base address\r
+ @param Offset Offset in register group\r
\r
@return Data read from serial port\r
\r
}\r
\r
/**\r
- Use IsaIo protocol to write serial port\r
+ Use IsaIo protocol to write serial port.\r
\r
- @param IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r
- @param BaseAddress - Serial port register group base address\r
- @param Offset - Offset in register group\r
- @param Data - data which is to be written to some serial port register\r
+ @param IsaIo Pointer to EFI_ISA_IO_PROTOCOL instance\r
+ @param BaseAddress Serial port register group base address\r
+ @param Offset Offset in register group\r
+ @param Data data which is to be written to some serial port register\r
\r
**/\r
VOID\r
projects / mirror_edk2.git / blobdiff