MdePkg/Include/IndustryStandard/IpmiKcs.h

/** @file
  IPMI KCS Register Definitions

  Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

  @par Revision Reference:
  IPMI Specification
  Version 2.0, Rev. 1.1
  https://www.intel.com/content/www/us/en/products/docs/servers/ipmi/ipmi-second-gen-interface-spec-v2-rev1-1.html
**/

#ifndef IPMI_KCS_H_
#define IPMI_KCS_H_

#define IPMI_KCS_STATUS_REGISTER_OFFSET    1
#define IPMI_KCS_COMMAND_REGISTER_OFFSET   1
#define IPMI_KCS_DATA_OUT_REGISTER_OFFSET  0
#define IPMI_KCS_DATA_IN_REGISTER_OFFSET   0

///
/// IPMI KCS Interface Status Bits
///
#define IPMI_KCS_OBF           BIT0
#define IPMI_KCS_IBF           BIT1
#define IPMI_KCS_SMS_ATN       BIT2
#define IPMI_KCS_COMMAND_DATA  BIT3
#define IPMI_KCS_OEM1          BIT4
#define IPMI_KCS_OEM2          BIT5
#define IPMI_KCS_S0            BIT6
#define IPMI_KCS_S1            BIT7

///
/// IPMI KCS Interface Control Codes
///
#define IPMI_KCS_CONTROL_CODE_GET_STATUS_ABORT  0x60
#define IPMI_KCS_CONTROL_CODE_WRITE_START       0x61
#define IPMI_KCS_CONTROL_CODE_WRITE_END         0x62
#define IPMI_KCS_CONTROL_CODE_READ              0x68

///
/// Status Codes
///
#define IPMI_KCS_STATUS_NO_ERROR      0x00
#define IPMI_KCS_STATUS_ABORT         0x01
#define IPMI_KCS_STATUS_ILLEGAL       0x02
#define IPMI_KCS_STATUS_LENGTH_ERROR  0x06
#define IPMI_KCS_STATUS_UNSPECIFIED   0xFF

///
/// KCS Interface State Bit
///
typedef enum {
  IpmiKcsIdleState = 0,
  IpmiKcsReadState,
  IpmiKcsWriteState,
  IpmiKcsErrorState
} IPMI_KCS_STATE;

///
/// IPMI KCS Interface Request Format
///
typedef struct {
  UINT8    NetFunc;
  UINT8    Command;
  UINT8    Data[];
} IPMI_KCS_REQUEST_HEADER;

///
/// IPMI KCS Interface Response Format
///
typedef struct {
  UINT8    NetFunc;
  UINT8    Command;
} IPMI_KCS_RESPONSE_HEADER;
#endif