[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 - 2007, 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
  Module Name:  SmbusHc.h\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 <Ppi/Smbus2.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. Status Codes Returned\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
                  Operation Signifies which particular SMBus\r
                  hardware protocol instance that 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 Length Signifies the\r
                    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\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 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 enumerate the entire\r
  SMBus or specific devices on the bus.\r
  \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
\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 that were enumerated\r
  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\r
                        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
\r
//\r
// EFI_SMBUS_NOTIFY_FUNCTION\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
  @param Execute  Executes the SMBus operation to an SMBus slave\r
                  device. See the Execute() function description.\r
  \r
  @param ArpDevice  Allows an SMBus 2.0 device(s) to be Address\r
                    Resolution Protocol (ARP).\r
  \r
  @param GetArpMap  Allows a driver to retrieve the address that\r
                    was allocated by the SMBus host controller\r
                    during enumeration/ARP. See the GetArpMap()\r
                    function description.\r
  \r
  @param  Notify    Allows a driver to register for a callback\r
                    to the SMBus host controller driver when the\r
                    bus issues a notification to the bus\r
                    controller driver. See the Notify() function\r
                    description.\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
d1f95000	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 - 2007, 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	Module Name: SmbusHc.h\r
	15	\r
	16	@par Revision Reference: PI\r
	17	Version 1.00.\r
	18	\r
	19	**/\r
	20	\r
	21	#ifndef __SMBUS_HC_H__\r
	22	#define __SMBUS_HC_H__\r
	23	\r
	24	#include <Ppi/Smbus2.h>\r
	25	\r
	26	#define EFI_SMBUS_HC_PROTOCOL_GUID \\r
	27	{0xe49d33ed, 0x513d, 0x4634, { 0xb6, 0x98, 0x6f, 0x55, 0xaa, 0x75, 0x1c, 0x1b} }\r
	28	\r
	29	typedef struct _EFI_SMBUS_HC_PROTOCOL EFI_SMBUS_HC_PROTOCOL;\r
	30	\r
	31	/**\r
	32	\r
	33	The Execute() function provides a standard way to execute an\r
	34	operation as defined in the System Management Bus (SMBus)\r
	35	Specification. The resulting transaction will be either that\r
	36	the SMBus slave devices accept this transaction or that this\r
	37	function returns with error. Status Codes Returned\r
	38	\r
	39	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
	40	SlaveAddress The SMBus slave address of the device\r
	41	with which to communicate. Type\r
	42	EFI_SMBUS_DEVICE_ADDRESS is defined in\r
	43	EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
	44	Initialization SMBus PPI Specification.\r
	45	\r
	46	@param Command This command is transmitted by the SMBus host\r
	47	controller to the SMBus slave device and the\r
	48	interpretation is SMBus slave device specific.\r
	49	It can mean the offset to a list of functions\r
	50	inside an SMBus slave device. Not all\r
	51	operations or slave devices support this\r
	52	command's registers. Type\r
	53	EFI_SMBUS_DEVICE_COMMAND is defined in\r
	54	EFI_PEI_SMBUS_PPI.Execute() in the Platform\r
	55	Initialization SMBus PPI Specification.\r
	56	Operation Signifies which particular SMBus\r
	57	hardware protocol instance that it will use to\r
	58	execute the SMBus transactions. This SMBus\r
	59	hardware protocol is defined by the SMBus\r
	60	Specification and is not related to PI\r
	61	Architecture. Type EFI_SMBUS_OPERATION is\r
	62	defined in EFI_PEI_SMBUS_PPI.Execute() in the\r
	63	Platform Initialization SMBus PPI\r
	64	Specification.\r
65	\r
66	@param PecCheck Defines if Packet Error Code (PEC) checking\r
67	is required for this operation. SMBus Host\r
68	Controller Code Definitions Version 1.0\r
69	August 21, 2006 13 Length Signifies the\r
70	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\r
87	incorrect).\r
88	\r
89	@retval EFI_TIMEOUT Timeout expired before the operation was\r
90	completed. Timeout is determined by the\r
91	SMBus host controller device.\r
92	\r
93	@retval EFI_OUT_OF_RESOURCES The request could not be\r
94	completed due to a lack of\r
95	resources.\r
96	\r
97	@retval EFI_DEVICE_ERROR The request was not completed\r
98	because a failure that was reflected\r
99	in the Host Status Register bit.\r
100	Device errors are a result of a\r
101	transaction collision, illegal\r
102	command field, unclaimed cycle (host\r
103	initiated), or bus errors\r
104	(collisions).\r
105	\r
106	@retval EFI_INVALID_PARAMETER Operation is not defined in\r
107	EFI_SMBUS_OPERATION.\r
108	\r
109	@retval EFI_INVALID_PARAMETER Length/Buffer is NULL for\r
110	operations except for\r
111	EfiSmbusQuickRead and\r
112	EfiSmbusQuickWrite. Length is\r
113	outside the range of valid\r
114	values.\r
115	\r
116	@retval EFI_UNSUPPORTED The SMBus operation or PEC is not\r
117	supported. \r
118	\r
119	@retval EFI_BUFFER_TOO_SMALL Buffer is not sufficient for\r
120	this operation.\r
121	\r
122	**/\r
123	typedef\r
124	EFI_STATUS\r
125	(EFIAPI *EFI_SMBUS_HC_EXECUTE_OPERATION) (\r
126	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
127	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
128	IN CONST EFI_SMBUS_DEVICE_COMMAND Command,\r
129	IN CONST EFI_SMBUS_OPERATION Operation,\r
130	IN CONST BOOLEAN PecCheck,\r
131	IN OUT UINTN *Length,\r
132	IN OUT VOID *Buffer\r
133	);\r
134	\r
135	\r
136	\r
137	/**\r
138	\r
139	The ArpDevice() function provides a standard way for a device driver to enumerate the entire\r
140	SMBus or specific devices on the bus.\r
141	\r
142	\r
143	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
144	\r
145	@param ArpAll A Boolean expression that indicates if the\r
146	host drivers need to enumerate all the devices\r
147	or enumerate only the device that is\r
148	identified by SmbusUdid. If ArpAll is TRUE,\r
149	SmbusUdid and SlaveAddress are optional. If\r
150	ArpAll is FALSE, ArpDevice will enumerate\r
151	SmbusUdid and the address will be at\r
152	SlaveAddress.\r
153	\r
154	@param SmbusUdid The Unique Device Identifier (UDID) that is\r
155	associated with this device. Type\r
156	EFI_SMBUS_UDID is defined in\r
157	EFI_PEI_SMBUS_PPI.ArpDevice() in the\r
158	Platform Initialization SMBus PPI\r
159	Specification.\r
160	\r
161	@param SlaveAddress The SMBus slave address that is\r
162	associated with an SMBus UDID.\r
163	\r
164	\r
165	\r
166	@retval EFI_SUCCESS The last data that was returned from the\r
167	access matched the poll exit criteria.\r
168	\r
169	@retval EFI_CRC_ERROR Checksum is not correct (PEC is\r
170	incorrect).\r
171	\r
172	@retval EFI_TIMEOUT Timeout expired before the operation was\r
173	completed. Timeout is determined by the\r
174	SMBus host controller device.\r
175	\r
176	@retval EFI_OUT_OF_RESOURCES The request could not be\r
177	completed due to a lack of\r
178	resources.\r
179	\r
180	@retval EFI_DEVICE_ERROR The request was not completed\r
181	because a failure was reflected in\r
182	the Host Status Register bit. Device\r
183	Errors are a result of a transaction\r
184	collision, illegal command field,\r
185	unclaimed cycle (host initiated), or\r
186	bus errors (collisions).\r
187	\r
188	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
189	not implemented by this driver.\r
190	\r
191	**/\r
192	typedef\r
193	EFI_STATUS\r
194	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE) (\r
195	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
196	IN CONST BOOLEAN ArpAll,\r
197	IN CONST EFI_SMBUS_UDID *SmbusUdid, OPTIONAL\r
198	IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL\r
199	);\r
200	\r
201	\r
202	/**\r
203	The GetArpMap() function returns the mapping of all the SMBus devices that were enumerated\r
204	by the SMBus host driver.\r
205	\r
206	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
207	\r
208	@param Length Size of the buffer that contains the SMBus\r
209	device map.\r
210	\r
211	@param SmbusDeviceMap The pointer to the device map as\r
212	enumerated by the SMBus controller\r
213	driver.\r
214	\r
215	@retval EFI_SUCCESS The SMBus returned the current device\r
216	map.\r
217	\r
218	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
219	not implemented by this driver.\r
220	\r
221	**/\r
222	typedef\r
223	EFI_STATUS\r
224	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP) (\r
225	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
226	IN OUT UINTN *Length,\r
227	IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap\r
228	);\r
229	\r
230	\r
231	\r
232	//\r
233	// EFI_SMBUS_NOTIFY_FUNCTION\r
234	//\r
235	typedef\r
236	EFI_STATUS\r
237	(EFIAPI *EFI_SMBUS_NOTIFY_FUNCTION) (\r
238	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
239	IN CONST UINTN Data\r
240	);\r
241	\r
242	\r
243	/**\r
244	\r
245	The Notify() function registers all the callback functions to\r
246	allow the bus driver to call these functions when the \r
247	SlaveAddress/Data pair happens.\r
248	\r
249	@param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r
250	\r
251	@param SlaveAddress Address that the host controller detects\r
252	as sending a message and calls all the registered function.\r
253	\r
254	@param Data Data that the host controller detects as sending\r
255	message and calls all the registered function.\r
256	\r
257	\r
258	@param NotifyFunction The function to call when the bus\r
259	driver detects the SlaveAddress and\r
260	Data pair.\r
261	\r
262	@retval EFI_SUCCESS NotifyFunction was registered.\r
263	\r
264	@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r
265	not implemented by this driver.\r
266	\r
267	**/\r
268	typedef\r
269	EFI_STATUS\r
270	(EFIAPI *EFI_SMBUS_HC_PROTOCOL_NOTIFY) (\r
271	IN CONST EFI_SMBUS_HC_PROTOCOL *This,\r
272	IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
273	IN CONST UINTN Data,\r
274	IN CONST EFI_SMBUS_NOTIFY_FUNCTION NotifyFunction\r
275	);\r
276	\r
277	\r
278	/**\r
279	The EFI_SMBUS_HC_PROTOCOL provides SMBus host controller management and basic data\r
280	transactions over SMBus. There is one EFI_SMBUS_HC_PROTOCOL instance for each SMBus\r
281	host controller.\r
282	\r
283	@param Execute Executes the SMBus operation to an SMBus slave\r
284	device. See the Execute() function description.\r
285	\r
286	@param ArpDevice Allows an SMBus 2.0 device(s) to be Address\r
287	Resolution Protocol (ARP).\r
288	\r
289	@param GetArpMap Allows a driver to retrieve the address that\r
290	was allocated by the SMBus host controller\r
291	during enumeration/ARP. See the GetArpMap()\r
292	function description.\r
293	\r
294	@param Notify Allows a driver to register for a callback\r
295	to the SMBus host controller driver when the\r
296	bus issues a notification to the bus\r
297	controller driver. See the Notify() function\r
298	description.\r
299	**/\r
300	struct _EFI_SMBUS_HC_PROTOCOL {\r
301	EFI_SMBUS_HC_EXECUTE_OPERATION Execute;\r
302	EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE ArpDevice;\r
303	EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP GetArpMap;\r
304	EFI_SMBUS_HC_PROTOCOL_NOTIFY Notify;\r
305	};\r
306	\r
307	\r
308	extern EFI_GUID gEfiSmbusHcProtocolGuid;\r
309	\r
310	#endif\r
311	\r