[mirror_edk2.git] / MdePkg / Include / Protocol / SmbusHc.h

/** @file\r
  The file provides basic SMBus host controller management \r
  and basic data transactions over the SMBus.\r
\r
  Copyright (c) 2006 - 2009, Intel Corporation                                                          \r
  All rights reserved. This program and the accompanying materials                          \r
  are licensed and made available under the terms and conditions of the BSD License         \r
  which accompanies this distribution.  The full text of the license may be found at        \r
  http://opensource.org/licenses/bsd-license.php                                            \r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
  @par Revision Reference: PI\r
  Version 1.00.\r
\r
**/\r
\r
#ifndef __SMBUS_HC_H__\r
#define __SMBUS_HC_H__\r
\r
#include <IndustryStandard/SmBus.h>\r
\r
#define EFI_SMBUS_HC_PROTOCOL_GUID \\r
  {0xe49d33ed, 0x513d, 0x4634, { 0xb6, 0x98, 0x6f, 0x55, 0xaa, 0x75, 0x1c, 0x1b} }\r
\r
typedef struct _EFI_SMBUS_HC_PROTOCOL EFI_SMBUS_HC_PROTOCOL;\r
\r
/**\r
     \r
  The Execute() function provides a standard way to execute an\r
  operation as defined in the System Management Bus (SMBus)\r
  Specification. The resulting transaction will be either that\r
  the SMBus slave devices accept this transaction or that this\r
  function returns with error. \r
  \r
  @param This     A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
                  SlaveAddress The SMBus slave address of the device\r
                  with which to communicate. Type\r
                  EFI_SMBUS_DEVICE_ADDRESS is defined in\r
                  EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
                  Initialization SMBus PPI Specification.\r
\r
  @param Command  This command is transmitted by the SMBus host\r
                  controller to the SMBus slave device and the\r
                  interpretation is SMBus slave device specific.\r
                  It can mean the offset to a list of functions\r
                  inside an SMBus slave device. Not all\r
                  operations or slave devices support this\r
                  command's registers. Type\r
                  EFI_SMBUS_DEVICE_COMMAND is defined in\r
                  EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
                  Initialization SMBus PPI Specification.\r
\r
 @param Operation Signifies the particular SMBus\r
                  hardware protocol instance it will use to\r
                  execute the SMBus transactions. This SMBus\r
                  hardware protocol is defined by the SMBus\r
                  Specification and is not related to PI\r
                  Architecture. Type EFI_SMBUS_OPERATION is\r
                  defined in EFI_PEI_SMBUS_PPI.Execute() in the\r
                  Platform Initialization SMBus PPI\r
                  Specification.\r
\r
  @param PecCheck Defines if Packet Error Code (PEC) checking\r
                  is required for this operation. SMBus Host\r
                  Controller Code Definitions Version 1.0\r
                  August 21, 2006 13 \r
                  \r
 @param Length    Signifies the number of bytes that this operation will do.\r
                  The maximum number of bytes can be revision\r
                  specific and operation specific. This field\r
                  will contain the actual number of bytes that\r
                  are executed for this operation. Not all\r
                  operations require this argument.\r
\r
  @param Buffer   Contains the value of data to execute to the\r
                  SMBus slave device. Not all operations require\r
                  this argument. The length of this buffer is\r
                  identified by Length.\r
  \r
  \r
  @retval EFI_SUCCESS           The last data that was returned from the\r
                                access matched the poll exit criteria.\r
\r
  @retval EFI_CRC_ERROR         Checksum is not correct (PEC is incorrect).\r
\r
  @retval EFI_TIMEOUT           Timeout expired before the operation was\r
                                completed. Timeout is determined by the\r
                                SMBus host controller device.\r
\r
  @retval EFI_OUT_OF_RESOURCES  The request could not be\r
                                completed due to a lack of\r
                                resources.\r
\r
  @retval EFI_DEVICE_ERROR      The request was not completed\r
                                because a failure that was reflected\r
                                in the Host Status Register bit.\r
                                Device errors are a result of a\r
                                transaction collision, illegal\r
                                command field, unclaimed cycle (host\r
                                initiated), or bus errors\r
                                (collisions).\r
\r
  @retval EFI_INVALID_PARAMETER Operation is not defined in\r
                                EFI_SMBUS_OPERATION.\r
\r
  @retval EFI_INVALID_PARAMETER Length/Buffer is NULL for\r
                                operations except for\r
                                EfiSmbusQuickRead and\r
                                EfiSmbusQuickWrite. Length is\r
                                outside the range of valid\r
                                values.\r
\r
  @retval EFI_UNSUPPORTED       The SMBus operation or PEC is not\r
                                supported. \r
\r
  @retval EFI_BUFFER_TOO_SMALL  Buffer is not sufficient for\r
                                this operation.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMBUS_HC_EXECUTE_OPERATION)(\r
  IN CONST  EFI_SMBUS_HC_PROTOCOL     *This,\r
  IN CONST  EFI_SMBUS_DEVICE_ADDRESS  SlaveAddress,\r
  IN CONST  EFI_SMBUS_DEVICE_COMMAND  Command,\r
  IN CONST  EFI_SMBUS_OPERATION       Operation,\r
  IN CONST  BOOLEAN                   PecCheck,\r
  IN OUT    UINTN                     *Length,\r
  IN OUT    VOID                      *Buffer\r
);\r
\r
\r
\r
/**\r
   \r
  The ArpDevice() function provides a standard way for a device driver to \r
  enumerate the entire SMBus or specific devices on the bus.\r
  \r
  @param This           A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
\r
  @param ArpAll         A Boolean expression that indicates if the\r
                        host drivers need to enumerate all the devices\r
                        or enumerate only the device that is\r
                        identified by SmbusUdid. If ArpAll is TRUE,\r
                        SmbusUdid and SlaveAddress are optional. If\r
                        ArpAll is FALSE, ArpDevice will enumerate\r
                        SmbusUdid and the address will be at\r
                        SlaveAddress.\r
\r
  @param SmbusUdid      The Unique Device Identifier (UDID) that is\r
                        associated with this device. Type\r
                        EFI_SMBUS_UDID is defined in\r
                        EFI_PEI_SMBUS_PPI.ArpDevice() in the\r
                        Platform Initialization SMBus PPI\r
                        Specification.\r
\r
  @param SlaveAddress   The SMBus slave address that is\r
                        associated with an SMBus UDID.\r
\r
  @retval EFI_SUCCESS           The last data that was returned from the\r
                                access matched the poll exit criteria.\r
\r
  @retval EFI_CRC_ERROR         Checksum is not correct (PEC is\r
                                incorrect).\r
\r
  @retval EFI_TIMEOUT           Timeout expired before the operation was\r
                                completed. Timeout is determined by the\r
                                SMBus host controller device.\r
\r
  @retval EFI_OUT_OF_RESOURCES  The request could not be\r
                                completed due to a lack of\r
                                resources.\r
\r
  @retval EFI_DEVICE_ERROR      The request was not completed\r
                                because a failure was reflected in\r
                                the Host Status Register bit. Device\r
                                Errors are a result of a transaction\r
                                collision, illegal command field,\r
                                unclaimed cycle (host initiated), or\r
                                bus errors (collisions).\r
\r
  @retval EFI_UNSUPPORTED       ArpDevice, GetArpMap, and Notify are\r
                                not implemented by this driver.\r
   \r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE)(\r
  IN CONST  EFI_SMBUS_HC_PROTOCOL     *This,\r
  IN CONST  BOOLEAN                   ArpAll,\r
  IN CONST  EFI_SMBUS_UDID            *SmbusUdid,   OPTIONAL\r
  IN OUT    EFI_SMBUS_DEVICE_ADDRESS  *SlaveAddress OPTIONAL\r
);\r
\r
\r
/**\r
  The GetArpMap() function returns the mapping of all the SMBus devices \r
  that were enumerated by the SMBus host driver.\r
  \r
  @param This           A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
  \r
  @param Length         Size of the buffer that contains the SMBus\r
                        device map.\r
  \r
  @param SmbusDeviceMap The pointer to the device map as\r
                        enumerated by the SMBus controller\r
                        driver.\r
  \r
  @retval EFI_SUCCESS       The SMBus returned the current device map.\r
  \r
  @retval EFI_UNSUPPORTED   ArpDevice, GetArpMap, and Notify are\r
                            not implemented by this driver.\r
  \r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP)(\r
  IN CONST  EFI_SMBUS_HC_PROTOCOL   *This,\r
  IN OUT    UINTN                   *Length,\r
  IN OUT    EFI_SMBUS_DEVICE_MAP    **SmbusDeviceMap\r
);\r
\r
/**\r
  The notify function does some actions.\r
  \r
  @param SlaveAddress\r
  The SMBUS hardware address to which the SMBUS device is preassigned or allocated.\r
\r
  @param Data\r
  Data of the SMBus host notify command that the caller wants to be called.\r
  \r
  @return EFI_STATUS\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMBUS_NOTIFY_FUNCTION)(\r
  IN CONST  EFI_SMBUS_DEVICE_ADDRESS  SlaveAddress,\r
  IN CONST  UINTN                     Data\r
);\r
\r
\r
/**\r
   \r
  The Notify() function registers all the callback functions to\r
  allow the bus driver to call these functions when the \r
  SlaveAddress/Data pair happens.\r
  \r
  @param  This            A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
  \r
  @param  SlaveAddress    Address that the host controller detects\r
                          as sending a message and calls all the registered function.\r
\r
  @param  Data            Data that the host controller detects as sending\r
                          message and calls all the registered function.\r
\r
\r
  @param  NotifyFunction  The function to call when the bus\r
                          driver detects the SlaveAddress and\r
                          Data pair.\r
\r
  @retval EFI_SUCCESS       NotifyFunction was registered.\r
  \r
  @retval EFI_UNSUPPORTED   ArpDevice, GetArpMap, and Notify are\r
                            not implemented by this driver.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMBUS_HC_PROTOCOL_NOTIFY)(\r
  IN CONST  EFI_SMBUS_HC_PROTOCOL     *This,\r
  IN CONST  EFI_SMBUS_DEVICE_ADDRESS  SlaveAddress,\r
  IN CONST  UINTN                     Data,\r
  IN CONST  EFI_SMBUS_NOTIFY_FUNCTION NotifyFunction\r
);\r
\r
\r
///\r
/// The EFI_SMBUS_HC_PROTOCOL provides SMBus host controller management and basic data\r
/// transactions over SMBus. There is one EFI_SMBUS_HC_PROTOCOL instance for each SMBus\r
/// host controller.\r
///\r
struct _EFI_SMBUS_HC_PROTOCOL {\r
  EFI_SMBUS_HC_EXECUTE_OPERATION    Execute;\r
  EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE  ArpDevice;\r
  EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP GetArpMap;\r
  EFI_SMBUS_HC_PROTOCOL_NOTIFY      Notify;\r
};\r
\r
\r
extern EFI_GUID gEfiSmbusHcProtocolGuid;\r
\r
#endif\r
\r
Commit	Line	Data
	1	/** @file\r
	2	The file provides basic SMBus host controller management \r
	3	and basic data transactions over the SMBus.\r
	4	\r
	5	Copyright (c) 2006 - 2009, Intel Corporation \r
	6	All rights reserved. This program and the accompanying materials \r
	7	are licensed and made available under the terms and conditions of the BSD License \r
	8	which accompanies this distribution. The full text of the license may be found at \r
	9	http://opensource.org/licenses/bsd-license.php \r
	10	\r
	11	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	12	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	13	\r
	14	@par Revision Reference: PI\r
	15	Version 1.00.\r
	16	\r
	17	**/\r
	18	\r
	19	#ifndef __SMBUS_HC_H__\r
	20	#define __SMBUS_HC_H__\r
	21	\r
	22	#include <IndustryStandard/SmBus.h>\r
	23	\r
	24	#define EFI_SMBUS_HC_PROTOCOL_GUID \\r
	25	{0xe49d33ed, 0x513d, 0x4634, { 0xb6, 0x98, 0x6f, 0x55, 0xaa, 0x75, 0x1c, 0x1b} }\r
	26	\r
	27	typedef struct _EFI_SMBUS_HC_PROTOCOL EFI_SMBUS_HC_PROTOCOL;\r
	28	\r
	29	/**\r
	30	\r
	31	The Execute() function provides a standard way to execute an\r
	32	operation as defined in the System Management Bus (SMBus)\r
	33	Specification. The resulting transaction will be either that\r
	34	the SMBus slave devices accept this transaction or that this\r
	35	function returns with error. \r
	36	\r
	37	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
	38	SlaveAddress The SMBus slave address of the device\r
	39	with which to communicate. Type\r
	40	EFI_SMBUS_DEVICE_ADDRESS is defined in\r
	41	EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
	42	Initialization SMBus PPI Specification.\r
	43	\r
	44	@param Command This command is transmitted by the SMBus host\r
	45	controller to the SMBus slave device and the\r
	46	interpretation is SMBus slave device specific.\r
	47	It can mean the offset to a list of functions\r
	48	inside an SMBus slave device. Not all\r
	49	operations or slave devices support this\r
	50	command's registers. Type\r
	51	EFI_SMBUS_DEVICE_COMMAND is defined in\r
	52	EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
	53	Initialization SMBus PPI Specification.\r
	54	\r
	55	@param Operation Signifies the particular SMBus\r
	56	hardware protocol instance it will use to\r
	57	execute the SMBus transactions. This SMBus\r
	58	hardware protocol is defined by the SMBus\r
	59	Specification and is not related to PI\r
	60	Architecture. Type EFI_SMBUS_OPERATION is\r
	61	defined in EFI_PEI_SMBUS_PPI.Execute() in the\r
	62	Platform Initialization SMBus PPI\r
	63	Specification.\r
	64	\r
	65	@param PecCheck Defines if Packet Error Code (PEC) checking\r
	66	is required for this operation. SMBus Host\r
	67	Controller Code Definitions Version 1.0\r
	68	August 21, 2006 13 \r
	69	\r
	70	@param Length Signifies the number of bytes that this operation will do.\r
	71	The maximum number of bytes can be revision\r
	72	specific and operation specific. This field\r
	73	will contain the actual number of bytes that\r
	74	are executed for this operation. Not all\r
	75	operations require this argument.\r
	76	\r
	77	@param Buffer Contains the value of data to execute to the\r
	78	SMBus slave device. Not all operations require\r
	79	this argument. The length of this buffer is\r
	80	identified by Length.\r
	81	\r
	82	\r
	83	@retval EFI_SUCCESS The last data that was returned from the\r
	84	access matched the poll exit criteria.\r
	85	\r
	86	@retval EFI_CRC_ERROR Checksum is not correct (PEC is incorrect).\r
	87	\r
	88	@retval EFI_TIMEOUT Timeout expired before the operation was\r
	89	completed. Timeout is determined by the\r
	90	SMBus host controller device.\r
	91	\r
	92	@retval EFI_OUT_OF_RESOURCES The request could not be\r
	93	completed due to a lack of\r
	94	resources.\r
	95	\r
	96	@retval EFI_DEVICE_ERROR The request was not completed\r
	97	because a failure that was reflected\r
	98	in the Host Status Register bit.\r
	99	Device errors are a result of a\r
	100	transaction collision, illegal\r
	101	command field, unclaimed cycle (host\r
	102	initiated), or bus errors\r
	103	(collisions).\r
	104	\r
	105	@retval EFI_INVALID_PARAMETER Operation is not defined in\r
	106	EFI_SMBUS_OPERATION.\r
	107	\r
	108	@retval EFI_INVALID_PARAMETER Length/Buffer is NULL for\r
	109	operations except for\r
	110	EfiSmbusQuickRead and\r
	111	EfiSmbusQuickWrite. Length is\r
	112	outside the range of valid\r
	113	values.\r
	114	\r
	115	@retval EFI_UNSUPPORTED The SMBus operation or PEC is not\r
	116	supported. \r
	117	\r
	118	@retval EFI_BUFFER_TOO_SMALL Buffer is not sufficient for\r
	119	this operation.\r
	120	\r
	121	**/\r
	122	typedef\r
	123	EFI_STATUS\r
	124	(EFIAPI *EFI_SMBUS_HC_EXECUTE_OPERATION)(\r
	125	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
	126	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
	127	IN CONST EFI_SMBUS_DEVICE_COMMAND Command,\r
	128	IN CONST EFI_SMBUS_OPERATION Operation,\r
	129	IN CONST BOOLEAN PecCheck,\r
	130	IN OUT UINTN *Length,\r
	131	IN OUT VOID *Buffer\r
	132	);\r
	133	\r
	134	\r
	135	\r
	136	/**\r
	137	\r
	138	The ArpDevice() function provides a standard way for a device driver to \r
	139	enumerate the entire SMBus or specific devices on the bus.\r
	140	\r
	141	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
	142	\r
	143	@param ArpAll A Boolean expression that indicates if the\r
	144	host drivers need to enumerate all the devices\r
	145	or enumerate only the device that is\r
	146	identified by SmbusUdid. If ArpAll is TRUE,\r
	147	SmbusUdid and SlaveAddress are optional. If\r
	148	ArpAll is FALSE, ArpDevice will enumerate\r
	149	SmbusUdid and the address will be at\r
	150	SlaveAddress.\r
	151	\r
	152	@param SmbusUdid The Unique Device Identifier (UDID) that is\r
	153	associated with this device. Type\r
	154	EFI_SMBUS_UDID is defined in\r
	155	EFI_PEI_SMBUS_PPI.ArpDevice() in the\r
	156	Platform Initialization SMBus PPI\r
	157	Specification.\r
	158	\r
	159	@param SlaveAddress The SMBus slave address that is\r
	160	associated with an SMBus UDID.\r
	161	\r
	162	@retval EFI_SUCCESS The last data that was returned from the\r
	163	access matched the poll exit criteria.\r
	164	\r
	165	@retval EFI_CRC_ERROR Checksum is not correct (PEC is\r
	166	incorrect).\r
	167	\r
	168	@retval EFI_TIMEOUT Timeout expired before the operation was\r
	169	completed. Timeout is determined by the\r
	170	SMBus host controller device.\r
	171	\r
	172	@retval EFI_OUT_OF_RESOURCES The request could not be\r
	173	completed due to a lack of\r
	174	resources.\r
	175	\r
	176	@retval EFI_DEVICE_ERROR The request was not completed\r
	177	because a failure was reflected in\r
	178	the Host Status Register bit. Device\r
	179	Errors are a result of a transaction\r
	180	collision, illegal command field,\r
	181	unclaimed cycle (host initiated), or\r
	182	bus errors (collisions).\r
	183	\r
	184	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
	185	not implemented by this driver.\r
	186	\r
	187	**/\r
	188	typedef\r
	189	EFI_STATUS\r
	190	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE)(\r
	191	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
	192	IN CONST BOOLEAN ArpAll,\r
	193	IN CONST EFI_SMBUS_UDID *SmbusUdid, OPTIONAL\r
	194	IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL\r
	195	);\r
	196	\r
	197	\r
	198	/**\r
	199	The GetArpMap() function returns the mapping of all the SMBus devices \r
	200	that were enumerated by the SMBus host driver.\r
	201	\r
	202	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
	203	\r
	204	@param Length Size of the buffer that contains the SMBus\r
	205	device map.\r
	206	\r
	207	@param SmbusDeviceMap The pointer to the device map as\r
	208	enumerated by the SMBus controller\r
	209	driver.\r
	210	\r
	211	@retval EFI_SUCCESS The SMBus returned the current device map.\r
	212	\r
	213	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
	214	not implemented by this driver.\r
	215	\r
	216	**/\r
	217	typedef\r
	218	EFI_STATUS\r
	219	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP)(\r
	220	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
	221	IN OUT UINTN *Length,\r
	222	IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap\r
	223	);\r
	224	\r
	225	/**\r
	226	The notify function does some actions.\r
	227	\r
	228	@param SlaveAddress\r
	229	The SMBUS hardware address to which the SMBUS device is preassigned or allocated.\r
	230	\r
	231	@param Data\r
	232	Data of the SMBus host notify command that the caller wants to be called.\r
	233	\r
	234	@return EFI_STATUS\r
	235	**/\r
	236	typedef\r
	237	EFI_STATUS\r
	238	(EFIAPI *EFI_SMBUS_NOTIFY_FUNCTION)(\r
	239	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
	240	IN CONST UINTN Data\r
	241	);\r
	242	\r
	243	\r
	244	/**\r
	245	\r
	246	The Notify() function registers all the callback functions to\r
	247	allow the bus driver to call these functions when the \r
	248	SlaveAddress/Data pair happens.\r
	249	\r
	250	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
	251	\r
	252	@param SlaveAddress Address that the host controller detects\r
	253	as sending a message and calls all the registered function.\r
	254	\r
	255	@param Data Data that the host controller detects as sending\r
	256	message and calls all the registered function.\r
	257	\r
	258	\r
	259	@param NotifyFunction The function to call when the bus\r
	260	driver detects the SlaveAddress and\r
	261	Data pair.\r
	262	\r
	263	@retval EFI_SUCCESS NotifyFunction was registered.\r
	264	\r
	265	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
	266	not implemented by this driver.\r
	267	\r
	268	**/\r
	269	typedef\r
	270	EFI_STATUS\r
	271	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_NOTIFY)(\r
	272	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
	273	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
	274	IN CONST UINTN Data,\r
	275	IN CONST EFI_SMBUS_NOTIFY_FUNCTION NotifyFunction\r
	276	);\r
	277	\r
	278	\r
	279	///\r
	280	/// The EFI_SMBUS_HC_PROTOCOL provides SMBus host controller management and basic data\r
	281	/// transactions over SMBus. There is one EFI_SMBUS_HC_PROTOCOL instance for each SMBus\r
	282	/// host controller.\r
	283	///\r
	284	struct _EFI_SMBUS_HC_PROTOCOL {\r
	285	EFI_SMBUS_HC_EXECUTE_OPERATION Execute;\r
	286	EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE ArpDevice;\r
	287	EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP GetArpMap;\r
	288	EFI_SMBUS_HC_PROTOCOL_NOTIFY Notify;\r
	289	};\r
	290	\r
	291	\r
	292	extern EFI_GUID gEfiSmbusHcProtocolGuid;\r
	293	\r
	294	#endif\r
	295	\r