/* $FreeBSD: head/sys/boot/efi/include/efiser.h 163898 2006-11-02 02:42:48Z marcel $ */
#ifndef _EFI_SER_H
#define _EFI_SER_H

/*++

Copyright (c)  1999 - 2002 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.

Module Name:

    efiser.h

Abstract:

    EFI serial protocol

Revision History

--*/

//
// Serial protocol
//

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

INTERFACE_DECL(_SERIAL_IO_INTERFACE);

typedef enum {
    DefaultParity,
    NoParity,
    EvenParity,
    OddParity,
    MarkParity,
    SpaceParity
} EFI_PARITY_TYPE;

typedef enum {
    DefaultStopBits,
    OneStopBit,         // 1 stop bit
    OneFiveStopBits,    // 1.5 stop bits
    TwoStopBits         // 2 stop bits
} EFI_STOP_BITS_TYPE;

#define EFI_SERIAL_CLEAR_TO_SEND                   0x0010  // RO
#define EFI_SERIAL_DATA_SET_READY                  0x0020  // RO
#define EFI_SERIAL_RING_INDICATE                   0x0040  // RO
#define EFI_SERIAL_CARRIER_DETECT                  0x0080  // RO
#define EFI_SERIAL_REQUEST_TO_SEND                 0x0002  // WO
#define EFI_SERIAL_DATA_TERMINAL_READY             0x0001  // WO
#define EFI_SERIAL_INPUT_BUFFER_EMPTY              0x0100  // RO
#define EFI_SERIAL_OUTPUT_BUFFER_EMPTY             0x0200  // RO
#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE        0x1000  // RW
#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE        0x2000  // RW
#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE    0x4000  // RW

typedef
EFI_STATUS
(EFIAPI *EFI_SERIAL_RESET) (
    IN struct _SERIAL_IO_INTERFACE  *This
    );

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

typedef
EFI_STATUS
(EFIAPI *EFI_SERIAL_SET_CONTROL_BITS) (
    IN struct _SERIAL_IO_INTERFACE  *This,
    IN UINT32                       Control
    );

typedef
EFI_STATUS
(EFIAPI *EFI_SERIAL_GET_CONTROL_BITS) (
    IN struct _SERIAL_IO_INTERFACE  *This,
    OUT UINT32                      *Control
    );

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

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

typedef struct {
    UINT32                  ControlMask;

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

#define SERIAL_IO_INTERFACE_REVISION    0x00010000

typedef struct _SERIAL_IO_INTERFACE {
    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;

    SERIAL_IO_MODE               *Mode;
} SERIAL_IO_INTERFACE;

#endif