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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 | |
c8c44377 | 5 | Copyright (c) 2006 - 2009, Intel Corporation \r |
d1f95000 | 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 | |
d1f95000 | 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 | |
992f22b9 | 22 | #include <IndustryStandard/SmBus.h>\r |
d1f95000 | 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 | |
c8c44377 | 35 | function returns with error. \r |
d1f95000 | 36 | \r |
4ca9b6c4 LG |
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 | |
d1f95000 | 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 | |
f754f721 | 54 | \r |
630b4187 | 55 | @param Operation Signifies the particular SMBus\r |
56 | hardware protocol instance it will use to\r | |
d1f95000 | 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 | |
4ca9b6c4 LG |
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 | |
630b4187 | 68 | August 21, 2006 13 \r |
69 | \r | |
70 | @param Length Signifies the number of bytes that this operation will do.\r | |
4ca9b6c4 LG |
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 | |
d1f95000 | 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 | |
4ca9b6c4 LG |
83 | @retval EFI_SUCCESS The last data that was returned from the\r |
84 | access matched the poll exit criteria.\r | |
d1f95000 | 85 | \r |
4ca9b6c4 | 86 | @retval EFI_CRC_ERROR Checksum is not correct (PEC is incorrect).\r |
d1f95000 | 87 | \r |
4ca9b6c4 LG |
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 | |
d1f95000 | 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 | |
4ca9b6c4 LG |
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 | |
d1f95000 | 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 | |
4ca9b6c4 LG |
115 | @retval EFI_UNSUPPORTED The SMBus operation or PEC is not\r |
116 | supported. \r | |
d1f95000 | 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 | |
8b13229b | 124 | (EFIAPI *EFI_SMBUS_HC_EXECUTE_OPERATION)(\r |
d1f95000 | 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 | |
4ca9b6c4 LG |
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 | |
d1f95000 | 140 | \r |
4ca9b6c4 LG |
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 | |
d1f95000 | 158 | \r |
159 | @param SlaveAddress The SMBus slave address that is\r | |
160 | associated with an SMBus UDID.\r | |
161 | \r | |
4ca9b6c4 LG |
162 | @retval EFI_SUCCESS The last data that was returned from the\r |
163 | access matched the poll exit criteria.\r | |
d1f95000 | 164 | \r |
4ca9b6c4 LG |
165 | @retval EFI_CRC_ERROR Checksum is not correct (PEC is\r |
166 | incorrect).\r | |
d1f95000 | 167 | \r |
4ca9b6c4 LG |
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 | |
d1f95000 | 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 | |
4ca9b6c4 LG |
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 | |
d1f95000 | 183 | \r |
4ca9b6c4 LG |
184 | @retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are\r |
185 | not implemented by this driver.\r | |
d1f95000 | 186 | \r |
187 | **/\r | |
188 | typedef\r | |
189 | EFI_STATUS\r | |
8b13229b | 190 | (EFIAPI *EFI_SMBUS_HC_PROTOCOL_ARP_DEVICE)(\r |
d1f95000 | 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 | |
4ca9b6c4 LG |
199 | The GetArpMap() function returns the mapping of all the SMBus devices \r |
200 | that were enumerated by the SMBus host driver.\r | |
d1f95000 | 201 | \r |
4ca9b6c4 | 202 | @param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r |
d1f95000 | 203 | \r |
4ca9b6c4 LG |
204 | @param Length Size of the buffer that contains the SMBus\r |
205 | device map.\r | |
d1f95000 | 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 | |
4ca9b6c4 | 211 | @retval EFI_SUCCESS The SMBus returned the current device map.\r |
d1f95000 | 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 | |
8b13229b | 219 | (EFIAPI *EFI_SMBUS_HC_PROTOCOL_GET_ARP_MAP)(\r |
d1f95000 | 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 | |
4ca9b6c4 LG |
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 | |
d1f95000 | 230 | \r |
4ca9b6c4 LG |
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 | |
d1f95000 | 236 | typedef\r |
237 | EFI_STATUS\r | |
8b13229b | 238 | (EFIAPI *EFI_SMBUS_NOTIFY_FUNCTION)(\r |
d1f95000 | 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 | |
4ca9b6c4 | 250 | @param This A pointer to the EFI_SMBUS_HC_PROTOCOL instance.\r |
d1f95000 | 251 | \r |
4ca9b6c4 | 252 | @param SlaveAddress Address that the host controller detects\r |
f754f721 | 253 | as sending a message and calls all the registered function.\r |
d1f95000 | 254 | \r |
4ca9b6c4 | 255 | @param Data Data that the host controller detects as sending\r |
f754f721 | 256 | message and calls all the registered function.\r |
d1f95000 | 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 | |
4ca9b6c4 | 263 | @retval EFI_SUCCESS NotifyFunction was registered.\r |
d1f95000 | 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 | |
8b13229b | 271 | (EFIAPI *EFI_SMBUS_HC_PROTOCOL_NOTIFY)(\r |
d1f95000 | 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 | |
44717a39 | 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 | |
d1f95000 | 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 |