Abstraction of a basic serial device. Targeted at 16550 UART, but\r
could be much more generic.\r
\r
- Copyright (c) 2006, Intel Corporation \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
+ Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
0xBB25CF6F, 0xF1D4, 0x11D2, {0x9A, 0x0C, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0xFD } \\r
}\r
\r
-//\r
-// Protocol GUID defined in EFI1.1.\r
-// \r
+#define EFI_SERIAL_TERMINAL_DEVICE_TYPE_GUID \\r
+ { \\r
+ 0X6AD9A60F, 0X5815, 0X4C7C, { 0X8A, 0X10, 0X50, 0X53, 0XD2, 0XBF, 0X7A, 0X1B } \\r
+ }\r
+\r
+///\r
+/// Protocol GUID defined in EFI1.1.\r
+///\r
#define SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL_GUID\r
\r
typedef struct _EFI_SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL;\r
\r
+///\r
+/// Backward-compatible with EFI1.1.\r
+///\r
+typedef EFI_SERIAL_IO_PROTOCOL SERIAL_IO_INTERFACE;\r
\r
-//\r
-// Backward-compatible with EFI1.1.\r
-// \r
-typedef EFI_SERIAL_IO_PROTOCOL SERIAL_IO_INTERFACE;\r
-\r
-//\r
-// Serial IO Data structures\r
-//\r
+///\r
+/// Parity type that is computed or checked as each character is transmitted or received. If the\r
+/// device does not support parity, the value is the default parity value.\r
+///\r
typedef enum {\r
DefaultParity,\r
NoParity,\r
SpaceParity\r
} EFI_PARITY_TYPE;\r
\r
+///\r
+/// Stop bits type\r
+///\r
typedef enum {\r
DefaultStopBits,\r
OneStopBit,\r
//\r
// Read Write\r
//\r
-#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE 0x00001000\r
-#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE 0x00002000\r
-#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000\r
+#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE 0x00001000\r
+#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE 0x00002000\r
+#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000\r
\r
//\r
// Serial IO Member Functions\r
//\r
+\r
/**\r
Reset the serial device.\r
\r
@param This Protocol instance pointer.\r
- \r
+\r
@retval EFI_SUCCESS The device was reset.\r
@retval EFI_DEVICE_ERROR The serial device could not be reset.\r
\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_RESET) (\r
+(EFIAPI *EFI_SERIAL_RESET)(\r
IN EFI_SERIAL_IO_PROTOCOL *This\r
- )\r
-;\r
+ );\r
\r
/**\r
- Sets the baud rate, receive FIFO depth, transmit/receice time out, parity, \r
- data buts, and stop bits on a serial device.\r
+ Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,\r
+ data bits, and stop bits on a serial device.\r
\r
@param This Protocol instance pointer.\r
- @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the\r
+ @param BaudRate The requested baud rate. A BaudRate value of 0 will use the\r
device's default interface speed.\r
@param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the\r
serial interface. A ReceiveFifoDepth value of 0 will use\r
- the device's dfault FIFO depth.\r
+ the device's default FIFO depth.\r
@param Timeout The requested time out for a single character in microseconds.\r
This timeout applies to both the transmit and receive side of the\r
interface. A Timeout value of 0 will use the device's default time\r
value of DefaultStopBits will use the device's default number of\r
stop bits.\r
\r
- @retval EFI_SUCCESS The device was reset.\r
- @retval EFI_DEVICE_ERROR The serial device could not be reset.\r
+ @retval EFI_SUCCESS The device was reset.\r
+ @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r
\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_SET_ATTRIBUTES) (\r
+(EFIAPI *EFI_SERIAL_SET_ATTRIBUTES)(\r
IN EFI_SERIAL_IO_PROTOCOL *This,\r
IN UINT64 BaudRate,\r
IN UINT32 ReceiveFifoDepth,\r
IN EFI_PARITY_TYPE Parity,\r
IN UINT8 DataBits,\r
IN EFI_STOP_BITS_TYPE StopBits\r
- )\r
-;\r
+ );\r
\r
/**\r
Set the control bits on a serial device\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_SET_CONTROL_BITS) (\r
+(EFIAPI *EFI_SERIAL_SET_CONTROL_BITS)(\r
IN EFI_SERIAL_IO_PROTOCOL *This,\r
IN UINT32 Control\r
- )\r
-;\r
+ );\r
\r
/**\r
Retrieves the status of thecontrol bits on a serial device\r
\r
@param This Protocol instance pointer.\r
@param Control A pointer to return the current Control signals from the serial device.\r
- \r
+\r
@retval EFI_SUCCESS The control bits were read from the serial device.\r
@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r
\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_GET_CONTROL_BITS) (\r
+(EFIAPI *EFI_SERIAL_GET_CONTROL_BITS)(\r
IN EFI_SERIAL_IO_PROTOCOL *This,\r
OUT UINT32 *Control\r
- )\r
-;\r
+ );\r
\r
/**\r
Writes data to a serial device.\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_WRITE) (\r
+(EFIAPI *EFI_SERIAL_WRITE)(\r
IN EFI_SERIAL_IO_PROTOCOL *This,\r
IN OUT UINTN *BufferSize,\r
IN VOID *Buffer\r
- )\r
-;\r
+ );\r
\r
/**\r
Writes data to a serial device.\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SERIAL_READ) (\r
+(EFIAPI *EFI_SERIAL_READ)(\r
IN EFI_SERIAL_IO_PROTOCOL *This,\r
IN OUT UINTN *BufferSize,\r
OUT VOID *Buffer\r
- )\r
-;\r
+ );\r
\r
/**\r
- The data values in SERIAL_IO_MODE are read-only and are updated by the code \r
+ @par Data Structure Description:\r
+ The data values in SERIAL_IO_MODE are read-only and are updated by the code\r
that produces the SERIAL_IO_PROTOCOL member functions.\r
\r
- ControlMask - A mask fo the Control bits that the device supports. The device\r
+ @param ControlMask\r
+ A mask for the Control bits that the device supports. The device\r
must always support the Input Buffer Empty control bit.\r
- TimeOut - If applicable, the number of microseconds to wait before timing out\r
+\r
+ @param TimeOut\r
+ If applicable, the number of microseconds to wait before timing out\r
a Read or Write operation.\r
- BaudRate - If applicable, the current baud rate setting of the device; otherwise,\r
+\r
+ @param BaudRate\r
+ If applicable, the current baud rate setting of the device; otherwise,\r
baud rate has the value of zero to indicate that device runs at the\r
device's designed speed.\r
- ReceiveFifoDepth - The number of characters the device will buffer on input\r
- DataBits - The number of characters the device will buffer on input\r
- Parity - If applicable, this is the EFI_PARITY_TYPE that is computed or \r
+\r
+ @param ReceiveFifoDepth\r
+ The number of characters the device will buffer on input\r
+\r
+ @param DataBits\r
+ The number of characters the device will buffer on input\r
+\r
+ @param Parity\r
+ If applicable, this is the EFI_PARITY_TYPE that is computed or\r
checked as each character is transmitted or reveived. If the device\r
does not support parity the value is the default parity value.\r
- StopBits - If applicable, the EFI_STOP_BITS_TYPE number of stop bits per\r
+\r
+ @param StopBits\r
+ If applicable, the EFI_STOP_BITS_TYPE number of stop bits per\r
character. If the device does not support stop bits the value is\r
the default stop bit values.\r
\r
**/\r
typedef struct {\r
- UINT32 ControlMask;\r
+ UINT32 ControlMask;\r
\r
//\r
// current Attributes\r
//\r
- UINT32 Timeout;\r
- UINT64 BaudRate;\r
- UINT32 ReceiveFifoDepth;\r
- UINT32 DataBits;\r
- UINT32 Parity;\r
- UINT32 StopBits;\r
+ UINT32 Timeout;\r
+ UINT64 BaudRate;\r
+ UINT32 ReceiveFifoDepth;\r
+ UINT32 DataBits;\r
+ UINT32 Parity;\r
+ UINT32 StopBits;\r
} EFI_SERIAL_IO_MODE;\r
\r
-#define EFI_SERIAL_IO_PROTOCOL_REVISION 0x00010000\r
-#define SERIAL_IO_INTERFACE_REVISION EFI_SERIAL_IO_PROTOCOL_REVISION\r
+#define EFI_SERIAL_IO_PROTOCOL_REVISION 0x00010000\r
+#define EFI_SERIAL_IO_PROTOCOL_REVISION1p1 0x00010001\r
+#define SERIAL_IO_INTERFACE_REVISION EFI_SERIAL_IO_PROTOCOL_REVISION\r
\r
+///\r
+/// The Serial I/O protocol is used to communicate with UART-style serial devices.\r
+/// These can be standard UART serial ports in PC-AT systems, serial ports attached\r
+/// to a USB interface, or potentially any character-based I/O device.\r
+///\r
struct _EFI_SERIAL_IO_PROTOCOL {\r
- UINT32 Revision;\r
- EFI_SERIAL_RESET Reset;\r
- EFI_SERIAL_SET_ATTRIBUTES SetAttributes;\r
- EFI_SERIAL_SET_CONTROL_BITS SetControl;\r
- EFI_SERIAL_GET_CONTROL_BITS GetControl;\r
- EFI_SERIAL_WRITE Write;\r
- EFI_SERIAL_READ Read;\r
-\r
- EFI_SERIAL_IO_MODE *Mode;\r
+ ///\r
+ /// The revision to which the EFI_SERIAL_IO_PROTOCOL adheres. All future revisions\r
+ /// must be backwards compatible. If a future version is not backwards compatible,\r
+ /// it is not the same GUID.\r
+ ///\r
+ UINT32 Revision;\r
+ EFI_SERIAL_RESET Reset;\r
+ EFI_SERIAL_SET_ATTRIBUTES SetAttributes;\r
+ EFI_SERIAL_SET_CONTROL_BITS SetControl;\r
+ EFI_SERIAL_GET_CONTROL_BITS GetControl;\r
+ EFI_SERIAL_WRITE Write;\r
+ EFI_SERIAL_READ Read;\r
+ ///\r
+ /// Pointer to SERIAL_IO_MODE data.\r
+ ///\r
+ EFI_SERIAL_IO_MODE *Mode;\r
+ ///\r
+ /// Pointer to a GUID identifying the device connected to the serial port.\r
+ /// This field is NULL when the protocol is installed by the serial port\r
+ /// driver and may be populated by a platform driver for a serial port\r
+ /// with a known device attached. The field will remain NULL if there is\r
+ /// no platform serial device identification information available.\r
+ ///\r
+ CONST EFI_GUID *DeviceTypeGuid; // Revision 1.1\r
};\r
\r
-extern EFI_GUID gEfiSerialIoProtocolGuid;\r
+extern EFI_GUID gEfiSerialIoProtocolGuid;\r
+extern EFI_GUID gEfiSerialTerminalDeviceTypeGuid;\r
\r
#endif\r
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