MdePkg/Include/IndustryStandard/SmBus.h

   1 /** @file
   2   This file declares the SMBus definitions defined in SmBus Specifciation
   3   V2.0.
   4
   5   Copyright (c) 2007, Intel Corporation
   6   All rights reserved. This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14   @par Revision Reference:
  15   These definitions are defined in System Management Bus (SmBus) Specification V2.0.
  16
  17 **/
  18
  19 #ifndef _SMBUS_H_
  20 #define _SMBUS_H_
  21
  22
  23 //
  24 // UDID of SMBUS device.
  25 //
  26 typedef struct {
  27   UINT32  VendorSpecificId;
  28   UINT16  SubsystemDeviceId;
  29   UINT16  SubsystemVendorId;
  30   UINT16  Interface;
  31   UINT16  DeviceId;
  32   UINT16  VendorId;
  33   UINT8   VendorRevision;
  34   UINT8   DeviceCapabilities;
  35 } EFI_SMBUS_UDID;
  36
  37 //
  38 // Smbus Device Address, Smbus Device Command, Smbus Operations
  39 //
  40 typedef struct {
  41   UINTN SmbusDeviceAddress : 7;
  42 } EFI_SMBUS_DEVICE_ADDRESS;
  43
  44 typedef UINTN EFI_SMBUS_DEVICE_COMMAND;
  45
  46 typedef enum _EFI_SMBUS_OPERATION
  47 {
  48   EfiSmbusQuickRead,
  49   EfiSmbusQuickWrite,
  50   EfiSmbusReceiveByte,
  51   EfiSmbusSendByte,
  52   EfiSmbusReadByte,
  53   EfiSmbusWriteByte,
  54   EfiSmbusReadWord,
  55   EfiSmbusWriteWord,
  56   EfiSmbusReadBlock,
  57   EfiSmbusWriteBlock,
  58   EfiSmbusProcessCall,
  59   EfiSmbusBWBRProcessCall
  60 } EFI_SMBUS_OPERATION;
  61
  62 #endif
  63