audk/MdePkg/Include/IndustryStandard/SmBus.h

/** @file
  This file declares the SMBus definitions defined in SmBus Specification V2.0
  and defined in PI1.0 specification volume 5.

  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _SMBUS_H_
#define _SMBUS_H_


///
/// UDID of SMBUS device.
///
typedef struct {
  UINT32  VendorSpecificId;
  UINT16  SubsystemDeviceId;
  UINT16  SubsystemVendorId;
  UINT16  Interface;
  UINT16  DeviceId;
  UINT16  VendorId;
  UINT8   VendorRevision;
  UINT8   DeviceCapabilities;
} EFI_SMBUS_UDID;

///
/// Smbus Device Address
///
typedef struct {
  ///
  /// The SMBUS hardware address to which the SMBUS device is preassigned or allocated.
  ///
  UINTN SmbusDeviceAddress : 7;
} EFI_SMBUS_DEVICE_ADDRESS;

typedef struct {
  ///
  /// The SMBUS hardware address to which the SMBUS device is preassigned or
  /// allocated. Type EFI_SMBUS_DEVICE_ADDRESS is defined in EFI_PEI_SMBUS2_PPI.Execute().
  ///
  EFI_SMBUS_DEVICE_ADDRESS  SmbusDeviceAddress;
  ///
  /// The SMBUS Unique Device Identifier (UDID) as defined in EFI_SMBUS_UDID.
  /// Type EFI_SMBUS_UDID is defined in EFI_PEI_SMBUS2_PPI.ArpDevice().
  ///
  EFI_SMBUS_UDID            SmbusDeviceUdid;
} EFI_SMBUS_DEVICE_MAP;

///
/// Smbus Operations
///
typedef enum _EFI_SMBUS_OPERATION {
  EfiSmbusQuickRead,
  EfiSmbusQuickWrite,
  EfiSmbusReceiveByte,
  EfiSmbusSendByte,
  EfiSmbusReadByte,
  EfiSmbusWriteByte,
  EfiSmbusReadWord,
  EfiSmbusWriteWord,
  EfiSmbusReadBlock,
  EfiSmbusWriteBlock,
  EfiSmbusProcessCall,
  EfiSmbusBWBRProcessCall
} EFI_SMBUS_OPERATION;

///
/// EFI_SMBUS_DEVICE_COMMAND
///
typedef UINTN   EFI_SMBUS_DEVICE_COMMAND;

#endif