Abstraction of a basic serial device. Targeted at 16550 UART, but\r
could be much more generic.\r
\r
- Copyright (c) 2006 - 2008, 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
\r
///\r
/// Protocol GUID defined in EFI1.1.\r
-/// \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
+///\r
typedef EFI_SERIAL_IO_PROTOCOL SERIAL_IO_INTERFACE;\r
\r
///\r
-/// Serial IO Data structures\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
SpaceParity\r
} EFI_PARITY_TYPE;\r
\r
+///\r
+/// Stop bits type\r
+///\r
typedef enum {\r
DefaultStopBits,\r
OneStopBit,\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
EFI_STATUS\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
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
(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
(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
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
IN EFI_SERIAL_IO_PROTOCOL *This,\r
IN OUT UINTN *BufferSize,\r
OUT VOID *Buffer\r
- )\r
-;\r
+ );\r
\r
/**\r
@par Data Structure Description:\r
- The data values in SERIAL_IO_MODE are read-only and are updated by the code \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
@param ControlMask\r
- A mask fo the Control bits that the device supports. The device\r
+ A mask for the Control bits that the device supports. The device\r
must always support the Input Buffer Empty control bit.\r
- \r
+\r
@param TimeOut\r
If applicable, the number of microseconds to wait before timing out\r
a Read or Write operation.\r
- \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
- \r
+\r
@param ReceiveFifoDepth\r
The number of characters the device will buffer on input\r
- \r
+\r
@param DataBits\r
The number of characters the device will buffer on input\r
- \r
+\r
@param Parity\r
- If applicable, this is the EFI_PARITY_TYPE that is computed or \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
- \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
#define EFI_SERIAL_IO_PROTOCOL_REVISION 0x00010000\r
#define SERIAL_IO_INTERFACE_REVISION EFI_SERIAL_IO_PROTOCOL_REVISION\r
\r
-/** \r
- @par Protocol Description:\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
- @param Revision\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 back wards compatible, \r
- it is not the same GUID.\r
-\r
- @param Reset\r
- Resets the hardware device.\r
-\r
- @param SetAttributes\r
- Sets communication parameters for a serial device. These include \r
- the baud rate, receive FIFO depth, transmit/receive time out, parity, data bits, \r
- and stop bit attributes.\r
-\r
- @param SetControl\r
- Sets the control bits on a serial device. These include Request to \r
- Send and Data Terminal Ready.\r
-\r
- @param GetControl\r
- Reads the status of the control bits on a serial device. These include \r
- Clear to Send, Data Set Ready, Ring Indicator, and Carrier Detect.\r
-\r
- @param Write\r
- Sends a buffer of characters to a serial device.\r
-\r
- @param Read\r
- Receives a buffer of characters from a serial device.\r
-\r
- @param Mode\r
- Pointer to SERIAL_IO_MODE data. \r
- \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
+ ///\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_GET_CONTROL_BITS GetControl;\r
EFI_SERIAL_WRITE Write;\r
EFI_SERIAL_READ Read;\r
-\r
+ ///\r
+ /// Pointer to SERIAL_IO_MODE data.\r
+ ///\r
EFI_SERIAL_IO_MODE *Mode;\r
};\r
\r