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#ifndef _EFI_SER_H
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#define _EFI_SER_H
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/*++
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Copyright (c) 1998  Intel Corporation
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Module Name:
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    efiser.h
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Abstract:
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    EFI serial protocol
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Revision History
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--*/
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//
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// Serial protocol
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//
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#define SERIAL_IO_PROTOCOL \
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    { 0xBB25CF6F, 0xF1D4, 0x11D2, {0x9A, 0x0C, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0xFD} }
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INTERFACE_DECL(_SERIAL_IO_INTERFACE);
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typedef enum {
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    DefaultParity,      
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    NoParity,          
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    EvenParity,
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    OddParity,
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    MarkParity,
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    SpaceParity
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} EFI_PARITY_TYPE;
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typedef enum {
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    DefaultStopBits,        
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    OneStopBit,         // 1 stop bit
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    OneFiveStopBits,    // 1.5 stop bits
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    TwoStopBits         // 2 stop bits
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} EFI_STOP_BITS_TYPE;
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#define EFI_SERIAL_CLEAR_TO_SEND                   0x0010  // RO
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#define EFI_SERIAL_DATA_SET_READY                  0x0020  // RO
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#define EFI_SERIAL_RING_INDICATE                   0x0040  // RO
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#define EFI_SERIAL_CARRIER_DETECT                  0x0080  // RO
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#define EFI_SERIAL_REQUEST_TO_SEND                 0x0002  // WO
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#define EFI_SERIAL_DATA_TERMINAL_READY             0x0001  // WO
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#define EFI_SERIAL_INPUT_BUFFER_EMPTY              0x0100  // RO
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#define EFI_SERIAL_OUTPUT_BUFFER_EMPTY             0x0200  // RO
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#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE        0x1000  // RW
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#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE        0x2000  // RW
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#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE    0x4000  // RW
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_RESET) (
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    IN struct _SERIAL_IO_INTERFACE  *This
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    );
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_SET_ATTRIBUTES) (
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    IN struct _SERIAL_IO_INTERFACE  *This,
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    IN UINT64                       BaudRate,
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    IN UINT32                       ReceiveFifoDepth,
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    IN UINT32                       Timeout,
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    IN EFI_PARITY_TYPE              Parity,
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    IN UINT8                        DataBits,
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    IN EFI_STOP_BITS_TYPE           StopBits
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    );
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_SET_CONTROL_BITS) (
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    IN struct _SERIAL_IO_INTERFACE  *This,
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    IN UINT32                       Control
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    );
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_GET_CONTROL_BITS) (
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    IN struct _SERIAL_IO_INTERFACE  *This,
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    OUT UINT32                      *Control
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    );
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_WRITE) (
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    IN struct _SERIAL_IO_INTERFACE  *This,
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    IN OUT UINTN                    *BufferSize,
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    IN VOID                         *Buffer
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    );
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SERIAL_READ) (
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    IN struct _SERIAL_IO_INTERFACE  *This,
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    IN OUT UINTN                    *BufferSize,
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    OUT VOID                        *Buffer
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    );
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typedef struct {
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    UINT32                  ControlMask;
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    // current Attributes
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    UINT32                  Timeout;
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    UINT64                  BaudRate;
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    UINT32                  ReceiveFifoDepth;
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    UINT32                  DataBits;
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    UINT32                  Parity;
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    UINT32                  StopBits;
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} SERIAL_IO_MODE;
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#define SERIAL_IO_INTERFACE_REVISION    0x00010000
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typedef struct _SERIAL_IO_INTERFACE {
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    UINT32                       Revision;
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    EFI_SERIAL_RESET             Reset;
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    EFI_SERIAL_SET_ATTRIBUTES    SetAttributes;
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    EFI_SERIAL_SET_CONTROL_BITS  SetControl;
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    EFI_SERIAL_GET_CONTROL_BITS  GetControl;
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    EFI_SERIAL_WRITE             Write;
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    EFI_SERIAL_READ              Read;
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    SERIAL_IO_MODE               *Mode;
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} SERIAL_IO_INTERFACE;
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#endif
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