MdePkg/Include/Protocol/SerialIo.h - edk2 - Git at Google

 /** @file
   Serial IO protocol as defined in the UEFI 2.0 specification.

   Abstraction of a basic serial device. Targeted at 16550 UART, but
   could be much more generic.

   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
   http://opensource.org/licenses/bsd-license.php

   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

 **/

 #ifndef __SERIAL_IO_PROTOCOL_H__
 #define __SERIAL_IO_PROTOCOL_H__

 #define EFI_SERIAL_IO_PROTOCOL_GUID \
   { \
     0xBB25CF6F, 0xF1D4, 0x11D2, {0x9A, 0x0C, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0xFD } \
   }

 ///
 /// Protocol GUID defined in EFI1.1.
 ///
 #define SERIAL_IO_PROTOCOL  EFI_SERIAL_IO_PROTOCOL_GUID

 typedef struct _EFI_SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL;


 ///
 /// Backward-compatible with EFI1.1.
 ///
 typedef EFI_SERIAL_IO_PROTOCOL  SERIAL_IO_INTERFACE;

 ///
 /// Parity type that is computed or checked as each character is transmitted or received. If the
 /// device does not support parity, the value is the default parity value.
 ///
 typedef enum {
   DefaultParity,
   NoParity,
   EvenParity,
   OddParity,
   MarkParity,
   SpaceParity
 } EFI_PARITY_TYPE;

 ///
 /// Stop bits type
 ///
 typedef enum {
   DefaultStopBits,
   OneStopBit,
   OneFiveStopBits,
   TwoStopBits
 } EFI_STOP_BITS_TYPE;

 //
 // define for Control bits, grouped by read only, write only, and read write
 //
 //
 // Read Only
 //
 #define EFI_SERIAL_CLEAR_TO_SEND        0x00000010
 #define EFI_SERIAL_DATA_SET_READY       0x00000020
 #define EFI_SERIAL_RING_INDICATE        0x00000040
 #define EFI_SERIAL_CARRIER_DETECT       0x00000080
 #define EFI_SERIAL_INPUT_BUFFER_EMPTY   0x00000100
 #define EFI_SERIAL_OUTPUT_BUFFER_EMPTY  0x00000200

 //
 // Write Only
 //
 #define EFI_SERIAL_REQUEST_TO_SEND      0x00000002
 #define EFI_SERIAL_DATA_TERMINAL_READY  0x00000001

 //
 // Read Write
 //
 #define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE     0x00001000
 #define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE     0x00002000
 #define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000

 //
 // Serial IO Member Functions
 //
 /**
   Reset the serial device.

   @param  This              Protocol instance pointer.

   @retval EFI_SUCCESS       The device was reset.
   @retval EFI_DEVICE_ERROR  The serial device could not be reset.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_RESET)(
   IN EFI_SERIAL_IO_PROTOCOL *This
   );

 /**
   Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,
   data bits, and stop bits on a serial device.

   @param  This             Protocol instance pointer.
   @param  BaudRate         The requested baud rate. A BaudRate value of 0 will use the
                            device's default interface speed.
   @param  ReveiveFifoDepth The requested depth of the FIFO on the receive side of the
                            serial interface. A ReceiveFifoDepth value of 0 will use
                            the device's default FIFO depth.
   @param  Timeout          The requested time out for a single character in microseconds.
                            This timeout applies to both the transmit and receive side of the
                            interface. A Timeout value of 0 will use the device's default time
                            out value.
   @param  Parity           The type of parity to use on this serial device. A Parity value of
                            DefaultParity will use the device's default parity value.
   @param  DataBits         The number of data bits to use on the serial device. A DataBits
                            vaule of 0 will use the device's default data bit setting.
   @param  StopBits         The number of stop bits to use on this serial device. A StopBits
                            value of DefaultStopBits will use the device's default number of
                            stop bits.

   @retval EFI_SUCCESS           The device was reset.
   @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.
   @retval EFI_DEVICE_ERROR      The serial device is not functioning correctly.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_SET_ATTRIBUTES)(
   IN EFI_SERIAL_IO_PROTOCOL         *This,
   IN UINT64                         BaudRate,
   IN UINT32                         ReceiveFifoDepth,
   IN UINT32                         Timeout,
   IN EFI_PARITY_TYPE                Parity,
   IN UINT8                          DataBits,
   IN EFI_STOP_BITS_TYPE             StopBits
   );

 /**
   Set the control bits on a serial device

   @param  This             Protocol instance pointer.
   @param  Control          Set the bits of Control that are settable.

   @retval EFI_SUCCESS      The new control bits were set on the serial device.
   @retval EFI_UNSUPPORTED  The serial device does not support this operation.
   @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_SET_CONTROL_BITS)(
   IN EFI_SERIAL_IO_PROTOCOL         *This,
   IN UINT32                         Control
   );

 /**
   Retrieves the status of thecontrol bits on a serial device

   @param  This              Protocol instance pointer.
   @param  Control           A pointer to return the current Control signals from the serial device.

   @retval EFI_SUCCESS       The control bits were read from the serial device.
   @retval EFI_DEVICE_ERROR  The serial device is not functioning correctly.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_GET_CONTROL_BITS)(
   IN EFI_SERIAL_IO_PROTOCOL         *This,
   OUT UINT32                        *Control
   );

 /**
   Writes data to a serial device.

   @param  This              Protocol instance pointer.
   @param  BufferSize        On input, the size of the Buffer. On output, the amount of
                             data actually written.
   @param  Buffer            The buffer of data to write

   @retval EFI_SUCCESS       The data was written.
   @retval EFI_DEVICE_ERROR  The device reported an error.
   @retval EFI_TIMEOUT       The data write was stopped due to a timeout.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_WRITE)(
   IN EFI_SERIAL_IO_PROTOCOL         *This,
   IN OUT UINTN                      *BufferSize,
   IN VOID                           *Buffer
   );

 /**
   Writes data to a serial device.

   @param  This              Protocol instance pointer.
   @param  BufferSize        On input, the size of the Buffer. On output, the amount of
                             data returned in Buffer.
   @param  Buffer            The buffer to return the data into.

   @retval EFI_SUCCESS       The data was read.
   @retval EFI_DEVICE_ERROR  The device reported an error.
   @retval EFI_TIMEOUT       The data write was stopped due to a timeout.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SERIAL_READ)(
   IN EFI_SERIAL_IO_PROTOCOL         *This,
   IN OUT UINTN                      *BufferSize,
   OUT VOID                          *Buffer
   );

 /**
   @par Data Structure Description:
   The data values in SERIAL_IO_MODE are read-only and are updated by the code
   that produces the SERIAL_IO_PROTOCOL member functions.

   @param ControlMask
   A mask for the Control bits that the device supports. The device
   must always support the Input Buffer Empty control bit.

   @param TimeOut
   If applicable, the number of microseconds to wait before timing out
   a Read or Write operation.

   @param BaudRate
   If applicable, the current baud rate setting of the device; otherwise,
   baud rate has the value of zero to indicate that device runs at the
   device's designed speed.

   @param ReceiveFifoDepth
   The number of characters the device will buffer on input

   @param DataBits
   The number of characters the device will buffer on input

   @param Parity
   If applicable, this is the EFI_PARITY_TYPE that is computed or
   checked as each character is transmitted or reveived. If the device
   does not support parity the value is the default parity value.

   @param StopBits
   If applicable, the EFI_STOP_BITS_TYPE number of stop bits per
   character. If the device does not support stop bits the value is
   the default stop bit values.

 **/
 typedef struct {
   UINT32  ControlMask;

   //
   // current Attributes
   //
   UINT32  Timeout;
   UINT64  BaudRate;
   UINT32  ReceiveFifoDepth;
   UINT32  DataBits;
   UINT32  Parity;
   UINT32  StopBits;
 } EFI_SERIAL_IO_MODE;

 #define EFI_SERIAL_IO_PROTOCOL_REVISION    0x00010000
 #define SERIAL_IO_INTERFACE_REVISION  EFI_SERIAL_IO_PROTOCOL_REVISION

 ///
 /// The Serial I/O protocol is used to communicate with UART-style serial devices.
 /// These can be standard UART serial ports in PC-AT systems, serial ports attached
 /// to a USB interface, or potentially any character-based I/O device.
 ///
 struct _EFI_SERIAL_IO_PROTOCOL {
   ///
   /// The revision to which the EFI_SERIAL_IO_PROTOCOL adheres. All future revisions
   /// must be backwards compatible. If a future version is not backwards compatible,
   /// it is not the same GUID.
   ///
   UINT32                      Revision;
   EFI_SERIAL_RESET            Reset;
   EFI_SERIAL_SET_ATTRIBUTES   SetAttributes;
   EFI_SERIAL_SET_CONTROL_BITS SetControl;
   EFI_SERIAL_GET_CONTROL_BITS GetControl;
   EFI_SERIAL_WRITE            Write;
   EFI_SERIAL_READ             Read;
   ///
   /// Pointer to SERIAL_IO_MODE data.
   ///
   EFI_SERIAL_IO_MODE          *Mode;
 };

 extern EFI_GUID gEfiSerialIoProtocolGuid;

 #endif
	/** @file
	Serial IO protocol as defined in the UEFI 2.0 specification.

	Abstraction of a basic serial device. Targeted at 16550 UART, but
	could be much more generic.

	Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
	This program and the accompanying materials
	are licensed and made available under the terms and conditions of the BSD License
	which accompanies this distribution. The full text of the license may be found at
	http://opensource.org/licenses/bsd-license.php

	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

	**/

	#ifndef __SERIAL_IO_PROTOCOL_H__
	#define __SERIAL_IO_PROTOCOL_H__

	#define EFI_SERIAL_IO_PROTOCOL_GUID \
	{ \
	0xBB25CF6F, 0xF1D4, 0x11D2, {0x9A, 0x0C, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0xFD } \
	}

	///
	/// Protocol GUID defined in EFI1.1.
	///
	#define SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL_GUID

	typedef struct _EFI_SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL;


	///
	/// Backward-compatible with EFI1.1.
	///
	typedef EFI_SERIAL_IO_PROTOCOL SERIAL_IO_INTERFACE;

	///
	/// Parity type that is computed or checked as each character is transmitted or received. If the
	/// device does not support parity, the value is the default parity value.
	///
	typedef enum {
	DefaultParity,
	NoParity,
	EvenParity,
	OddParity,
	MarkParity,
	SpaceParity
	} EFI_PARITY_TYPE;

	///
	/// Stop bits type
	///
	typedef enum {
	DefaultStopBits,
	OneStopBit,
	OneFiveStopBits,
	TwoStopBits
	} EFI_STOP_BITS_TYPE;

	//
	// define for Control bits, grouped by read only, write only, and read write
	//
	//
	// Read Only
	//
	#define EFI_SERIAL_CLEAR_TO_SEND 0x00000010
	#define EFI_SERIAL_DATA_SET_READY 0x00000020
	#define EFI_SERIAL_RING_INDICATE 0x00000040
	#define EFI_SERIAL_CARRIER_DETECT 0x00000080
	#define EFI_SERIAL_INPUT_BUFFER_EMPTY 0x00000100
	#define EFI_SERIAL_OUTPUT_BUFFER_EMPTY 0x00000200

	//
	// Write Only
	//
	#define EFI_SERIAL_REQUEST_TO_SEND 0x00000002
	#define EFI_SERIAL_DATA_TERMINAL_READY 0x00000001

	//
	// Read Write
	//
	#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE 0x00001000
	#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE 0x00002000
	#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000

	//
	// Serial IO Member Functions
	//
	/**
	Reset the serial device.

	@param This Protocol instance pointer.

	@retval EFI_SUCCESS The device was reset.
	@retval EFI_DEVICE_ERROR The serial device could not be reset.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_RESET)(
	IN EFI_SERIAL_IO_PROTOCOL *This
	);

	/**
	Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,
	data bits, and stop bits on a serial device.

	@param This Protocol instance pointer.
	@param BaudRate The requested baud rate. A BaudRate value of 0 will use the
	device's default interface speed.
	@param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the
	serial interface. A ReceiveFifoDepth value of 0 will use
	the device's default FIFO depth.
	@param Timeout The requested time out for a single character in microseconds.
	This timeout applies to both the transmit and receive side of the
	interface. A Timeout value of 0 will use the device's default time
	out value.
	@param Parity The type of parity to use on this serial device. A Parity value of
	DefaultParity will use the device's default parity value.
	@param DataBits The number of data bits to use on the serial device. A DataBits
	vaule of 0 will use the device's default data bit setting.
	@param StopBits The number of stop bits to use on this serial device. A StopBits
	value of DefaultStopBits will use the device's default number of
	stop bits.

	@retval EFI_SUCCESS The device was reset.
	@retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.
	@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_SET_ATTRIBUTES)(
	IN EFI_SERIAL_IO_PROTOCOL *This,
	IN UINT64 BaudRate,
	IN UINT32 ReceiveFifoDepth,
	IN UINT32 Timeout,
	IN EFI_PARITY_TYPE Parity,
	IN UINT8 DataBits,
	IN EFI_STOP_BITS_TYPE StopBits
	);

	/**
	Set the control bits on a serial device

	@param This Protocol instance pointer.
	@param Control Set the bits of Control that are settable.

	@retval EFI_SUCCESS The new control bits were set on the serial device.
	@retval EFI_UNSUPPORTED The serial device does not support this operation.
	@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_SET_CONTROL_BITS)(
	IN EFI_SERIAL_IO_PROTOCOL *This,
	IN UINT32 Control
	);

	/**
	Retrieves the status of thecontrol bits on a serial device

	@param This Protocol instance pointer.
	@param Control A pointer to return the current Control signals from the serial device.

	@retval EFI_SUCCESS The control bits were read from the serial device.
	@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_GET_CONTROL_BITS)(
	IN EFI_SERIAL_IO_PROTOCOL *This,
	OUT UINT32 *Control
	);

	/**
	Writes data to a serial device.

	@param This Protocol instance pointer.
	@param BufferSize On input, the size of the Buffer. On output, the amount of
	data actually written.
	@param Buffer The buffer of data to write

	@retval EFI_SUCCESS The data was written.
	@retval EFI_DEVICE_ERROR The device reported an error.
	@retval EFI_TIMEOUT The data write was stopped due to a timeout.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_WRITE)(
	IN EFI_SERIAL_IO_PROTOCOL *This,
	IN OUT UINTN *BufferSize,
	IN VOID *Buffer
	);

	/**
	Writes data to a serial device.

	@param This Protocol instance pointer.
	@param BufferSize On input, the size of the Buffer. On output, the amount of
	data returned in Buffer.
	@param Buffer The buffer to return the data into.

	@retval EFI_SUCCESS The data was read.
	@retval EFI_DEVICE_ERROR The device reported an error.
	@retval EFI_TIMEOUT The data write was stopped due to a timeout.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_SERIAL_READ)(
	IN EFI_SERIAL_IO_PROTOCOL *This,
	IN OUT UINTN *BufferSize,
	OUT VOID *Buffer
	);

	/**
	@par Data Structure Description:
	The data values in SERIAL_IO_MODE are read-only and are updated by the code
	that produces the SERIAL_IO_PROTOCOL member functions.

	@param ControlMask
	A mask for the Control bits that the device supports. The device
	must always support the Input Buffer Empty control bit.

	@param TimeOut
	If applicable, the number of microseconds to wait before timing out
	a Read or Write operation.

	@param BaudRate
	If applicable, the current baud rate setting of the device; otherwise,
	baud rate has the value of zero to indicate that device runs at the
	device's designed speed.

	@param ReceiveFifoDepth
	The number of characters the device will buffer on input

	@param DataBits
	The number of characters the device will buffer on input

	@param Parity
	If applicable, this is the EFI_PARITY_TYPE that is computed or
	checked as each character is transmitted or reveived. If the device
	does not support parity the value is the default parity value.

	@param StopBits
	If applicable, the EFI_STOP_BITS_TYPE number of stop bits per
	character. If the device does not support stop bits the value is
	the default stop bit values.

	**/
	typedef struct {
	UINT32 ControlMask;

	//
	// current Attributes
	//
	UINT32 Timeout;
	UINT64 BaudRate;
	UINT32 ReceiveFifoDepth;
	UINT32 DataBits;
	UINT32 Parity;
	UINT32 StopBits;
	} EFI_SERIAL_IO_MODE;

	#define EFI_SERIAL_IO_PROTOCOL_REVISION 0x00010000
	#define SERIAL_IO_INTERFACE_REVISION EFI_SERIAL_IO_PROTOCOL_REVISION

	///
	/// The Serial I/O protocol is used to communicate with UART-style serial devices.
	/// These can be standard UART serial ports in PC-AT systems, serial ports attached
	/// to a USB interface, or potentially any character-based I/O device.
	///
	struct _EFI_SERIAL_IO_PROTOCOL {
	///
	/// The revision to which the EFI_SERIAL_IO_PROTOCOL adheres. All future revisions
	/// must be backwards compatible. If a future version is not backwards compatible,
	/// it is not the same GUID.
	///
	UINT32 Revision;
	EFI_SERIAL_RESET Reset;
	EFI_SERIAL_SET_ATTRIBUTES SetAttributes;
	EFI_SERIAL_SET_CONTROL_BITS SetControl;
	EFI_SERIAL_GET_CONTROL_BITS GetControl;
	EFI_SERIAL_WRITE Write;
	EFI_SERIAL_READ Read;
	///
	/// Pointer to SERIAL_IO_MODE data.
	///
	EFI_SERIAL_IO_MODE *Mode;
	};

	extern EFI_GUID gEfiSerialIoProtocolGuid;

	#endif