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1 | /** @file\r | |
2 | Implementation of SmBusLib class library for PEI phase.\r | |
3 | \r | |
4 | Copyright (c) 2006, Intel Corporation<BR>\r | |
5 | All rights reserved. This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | \r | |
14 | Module Name: SmbusLib.c\r | |
15 | \r | |
16 | **/\r | |
17 | \r | |
18 | #include "InternalSmbusLib.h"\r | |
19 | \r | |
20 | /**\r | |
21 | Executes an SMBUS quick read command.\r | |
22 | \r | |
23 | Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress.\r | |
24 | Only the SMBUS slave address field of SmBusAddress is required.\r | |
25 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
26 | If PEC is set in SmBusAddress, then ASSERT().\r | |
27 | If Command in SmBusAddress is not zero, then ASSERT().\r | |
28 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
29 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
30 | \r | |
31 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
32 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
33 | @param Status Return status for the executed command.\r | |
34 | This is an optional parameter and may be NULL.\r | |
35 | \r | |
36 | **/\r | |
37 | VOID\r | |
38 | EFIAPI\r | |
39 | SmBusQuickRead (\r | |
40 | IN UINTN SmBusAddress,\r | |
41 | OUT RETURN_STATUS *Status OPTIONAL\r | |
42 | )\r | |
43 | {\r | |
44 | ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r | |
45 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r | |
46 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
47 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
48 | \r | |
49 | InternalSmBusExec (EfiSmbusQuickRead, SmBusAddress, 0, NULL, Status);\r | |
50 | }\r | |
51 | \r | |
52 | /**\r | |
53 | Executes an SMBUS quick write command.\r | |
54 | \r | |
55 | Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress.\r | |
56 | Only the SMBUS slave address field of SmBusAddress is required.\r | |
57 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
58 | If PEC is set in SmBusAddress, then ASSERT().\r | |
59 | If Command in SmBusAddress is not zero, then ASSERT().\r | |
60 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
61 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
62 | \r | |
63 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
64 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
65 | @param Status Return status for the executed command.\r | |
66 | This is an optional parameter and may be NULL.\r | |
67 | \r | |
68 | **/\r | |
69 | VOID\r | |
70 | EFIAPI\r | |
71 | SmBusQuickWrite (\r | |
72 | IN UINTN SmBusAddress,\r | |
73 | OUT RETURN_STATUS *Status OPTIONAL\r | |
74 | )\r | |
75 | {\r | |
76 | ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r | |
77 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r | |
78 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
79 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
80 | \r | |
81 | InternalSmBusExec (EfiSmbusQuickWrite, SmBusAddress, 0, NULL, Status);\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Executes an SMBUS receive byte command.\r | |
86 | \r | |
87 | Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress.\r | |
88 | Only the SMBUS slave address field of SmBusAddress is required.\r | |
89 | The byte received from the SMBUS is returned.\r | |
90 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
91 | If Command in SmBusAddress is not zero, then ASSERT().\r | |
92 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
93 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
94 | \r | |
95 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
96 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
97 | @param Status Return status for the executed command.\r | |
98 | This is an optional parameter and may be NULL.\r | |
99 | \r | |
100 | @return The byte received from the SMBUS.\r | |
101 | \r | |
102 | **/\r | |
103 | UINT8\r | |
104 | EFIAPI\r | |
105 | SmBusReceiveByte (\r | |
106 | IN UINTN SmBusAddress,\r | |
107 | OUT RETURN_STATUS *Status OPTIONAL\r | |
108 | )\r | |
109 | {\r | |
110 | UINT8 Byte;\r | |
111 | \r | |
112 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r | |
113 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
114 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
115 | \r | |
116 | InternalSmBusExec (EfiSmbusReceiveByte, SmBusAddress, 1, &Byte, Status);\r | |
117 | \r | |
118 | return Byte;\r | |
119 | }\r | |
120 | \r | |
121 | /**\r | |
122 | Executes an SMBUS send byte command.\r | |
123 | \r | |
124 | Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress.\r | |
125 | The byte specified by Value is sent.\r | |
126 | Only the SMBUS slave address field of SmBusAddress is required. Value is returned.\r | |
127 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
128 | If Command in SmBusAddress is not zero, then ASSERT().\r | |
129 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
130 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
131 | \r | |
132 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
133 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
134 | @param Value The 8-bit value to send.\r | |
135 | @param Status Return status for the executed command.\r | |
136 | This is an optional parameter and may be NULL.\r | |
137 | \r | |
138 | @return The parameter of Value.\r | |
139 | \r | |
140 | **/\r | |
141 | UINT8\r | |
142 | EFIAPI\r | |
143 | SmBusSendByte (\r | |
144 | IN UINTN SmBusAddress,\r | |
145 | IN UINT8 Value,\r | |
146 | OUT RETURN_STATUS *Status OPTIONAL\r | |
147 | )\r | |
148 | {\r | |
149 | UINT8 Byte;\r | |
150 | \r | |
151 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r | |
152 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
153 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
154 | \r | |
155 | Byte = Value;\r | |
156 | InternalSmBusExec (EfiSmbusSendByte, SmBusAddress, 1, &Byte, Status);\r | |
157 | \r | |
158 | return Value;\r | |
159 | }\r | |
160 | \r | |
161 | /**\r | |
162 | Executes an SMBUS read data byte command.\r | |
163 | \r | |
164 | Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress.\r | |
165 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
166 | The 8-bit value read from the SMBUS is returned.\r | |
167 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
168 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
169 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
170 | \r | |
171 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
172 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
173 | @param Status Return status for the executed command.\r | |
174 | This is an optional parameter and may be NULL.\r | |
175 | \r | |
176 | @return The byte read from the SMBUS.\r | |
177 | \r | |
178 | **/\r | |
179 | UINT8\r | |
180 | EFIAPI\r | |
181 | SmBusReadDataByte (\r | |
182 | IN UINTN SmBusAddress,\r | |
183 | OUT RETURN_STATUS *Status OPTIONAL\r | |
184 | )\r | |
185 | {\r | |
186 | UINT8 Byte;\r | |
187 | \r | |
188 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
189 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
190 | \r | |
191 | InternalSmBusExec (EfiSmbusReadByte, SmBusAddress, 1, &Byte, Status);\r | |
192 | \r | |
193 | return Byte;\r | |
194 | }\r | |
195 | \r | |
196 | /**\r | |
197 | Executes an SMBUS write data byte command.\r | |
198 | \r | |
199 | Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress.\r | |
200 | The 8-bit value specified by Value is written.\r | |
201 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
202 | Value is returned.\r | |
203 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
204 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
205 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
206 | \r | |
207 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
208 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
209 | @param Value The 8-bit value to write.\r | |
210 | @param Status Return status for the executed command.\r | |
211 | This is an optional parameter and may be NULL.\r | |
212 | \r | |
213 | @return The parameter of Value.\r | |
214 | \r | |
215 | **/\r | |
216 | UINT8\r | |
217 | EFIAPI\r | |
218 | SmBusWriteDataByte (\r | |
219 | IN UINTN SmBusAddress,\r | |
220 | IN UINT8 Value,\r | |
221 | OUT RETURN_STATUS *Status OPTIONAL\r | |
222 | )\r | |
223 | {\r | |
224 | UINT8 Byte;\r | |
225 | \r | |
226 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
227 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
228 | \r | |
229 | Byte = Value;\r | |
230 | InternalSmBusExec (EfiSmbusWriteByte, SmBusAddress, 1, &Byte, Status);\r | |
231 | \r | |
232 | return Value;\r | |
233 | }\r | |
234 | \r | |
235 | /**\r | |
236 | Executes an SMBUS read data word command.\r | |
237 | \r | |
238 | Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress.\r | |
239 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
240 | The 16-bit value read from the SMBUS is returned.\r | |
241 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
242 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
243 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
244 | \r | |
245 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
246 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
247 | @param Status Return status for the executed command.\r | |
248 | This is an optional parameter and may be NULL.\r | |
249 | \r | |
250 | @return The byte read from the SMBUS.\r | |
251 | \r | |
252 | **/\r | |
253 | UINT16\r | |
254 | EFIAPI\r | |
255 | SmBusReadDataWord (\r | |
256 | IN UINTN SmBusAddress,\r | |
257 | OUT RETURN_STATUS *Status OPTIONAL\r | |
258 | )\r | |
259 | {\r | |
260 | UINT16 Word;\r | |
261 | \r | |
262 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
263 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
264 | \r | |
265 | InternalSmBusExec (EfiSmbusReadWord, SmBusAddress, 2, &Word, Status);\r | |
266 | \r | |
267 | return Word;\r | |
268 | }\r | |
269 | \r | |
270 | /**\r | |
271 | Executes an SMBUS write data word command.\r | |
272 | \r | |
273 | Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress.\r | |
274 | The 16-bit value specified by Value is written.\r | |
275 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
276 | Value is returned.\r | |
277 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
278 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
279 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
280 | \r | |
281 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
282 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
283 | @param Value The 16-bit value to write.\r | |
284 | @param Status Return status for the executed command.\r | |
285 | This is an optional parameter and may be NULL.\r | |
286 | \r | |
287 | @return The parameter of Value.\r | |
288 | \r | |
289 | **/\r | |
290 | UINT16\r | |
291 | EFIAPI\r | |
292 | SmBusWriteDataWord (\r | |
293 | IN UINTN SmBusAddress,\r | |
294 | IN UINT16 Value,\r | |
295 | OUT RETURN_STATUS *Status OPTIONAL\r | |
296 | )\r | |
297 | {\r | |
298 | UINT16 Word;\r | |
299 | \r | |
300 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
301 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
302 | \r | |
303 | Word = Value;\r | |
304 | InternalSmBusExec (EfiSmbusWriteWord, SmBusAddress, 2, &Word, Status);\r | |
305 | \r | |
306 | return Value;\r | |
307 | }\r | |
308 | \r | |
309 | /**\r | |
310 | Executes an SMBUS process call command.\r | |
311 | \r | |
312 | Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress.\r | |
313 | The 16-bit value specified by Value is written.\r | |
314 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
315 | The 16-bit value returned by the process call command is returned.\r | |
316 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
317 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
318 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
319 | \r | |
320 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
321 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
322 | @param Value The 16-bit value to write.\r | |
323 | @param Status Return status for the executed command.\r | |
324 | This is an optional parameter and may be NULL.\r | |
325 | \r | |
326 | @return The 16-bit value returned by the process call command.\r | |
327 | \r | |
328 | **/\r | |
329 | UINT16\r | |
330 | EFIAPI\r | |
331 | SmBusProcessCall (\r | |
332 | IN UINTN SmBusAddress,\r | |
333 | IN UINT16 Value,\r | |
334 | OUT RETURN_STATUS *Status OPTIONAL\r | |
335 | )\r | |
336 | {\r | |
337 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
338 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
339 | \r | |
340 | InternalSmBusExec (EfiSmbusProcessCall, SmBusAddress, 2, &Value, Status);\r | |
341 | \r | |
342 | return Value;\r | |
343 | }\r | |
344 | \r | |
345 | /**\r | |
346 | Executes an SMBUS read block command.\r | |
347 | \r | |
348 | Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress.\r | |
349 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r | |
350 | Bytes are read from the SMBUS and stored in Buffer.\r | |
351 | The number of bytes read is returned, and will never return a value larger than 32-bytes.\r | |
352 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
353 | It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.\r | |
354 | SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r | |
355 | If Length in SmBusAddress is not zero, then ASSERT().\r | |
356 | If Buffer is NULL, then ASSERT().\r | |
357 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
358 | \r | |
359 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
360 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
361 | @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r | |
362 | @param Status Return status for the executed command.\r | |
363 | This is an optional parameter and may be NULL.\r | |
364 | \r | |
365 | @return The number of bytes read.\r | |
366 | \r | |
367 | **/\r | |
368 | UINTN\r | |
369 | EFIAPI\r | |
370 | SmBusReadBlock (\r | |
371 | IN UINTN SmBusAddress,\r | |
372 | OUT VOID *Buffer,\r | |
373 | OUT RETURN_STATUS *Status OPTIONAL\r | |
374 | )\r | |
375 | {\r | |
376 | ASSERT (Buffer != NULL);\r | |
377 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r | |
378 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
379 | \r | |
380 | return InternalSmBusExec (EfiSmbusReadBlock, SmBusAddress, 0x20, Buffer, Status);\r | |
381 | }\r | |
382 | \r | |
383 | /**\r | |
384 | Executes an SMBUS write block command.\r | |
385 | \r | |
386 | Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress.\r | |
387 | The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r | |
388 | Bytes are written to the SMBUS from Buffer.\r | |
389 | The number of bytes written is returned, and will never return a value larger than 32-bytes.\r | |
390 | If Status is not NULL, then the status of the executed command is returned in Status. \r | |
391 | If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r | |
392 | If Buffer is NULL, then ASSERT().\r | |
393 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
394 | \r | |
395 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
396 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
397 | @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r | |
398 | @param Status Return status for the executed command.\r | |
399 | This is an optional parameter and may be NULL.\r | |
400 | \r | |
401 | @return The number of bytes written.\r | |
402 | \r | |
403 | **/\r | |
404 | UINTN\r | |
405 | EFIAPI\r | |
406 | SmBusWriteBlock (\r | |
407 | IN UINTN SmBusAddress,\r | |
408 | OUT VOID *Buffer,\r | |
409 | OUT RETURN_STATUS *Status OPTIONAL\r | |
410 | )\r | |
411 | {\r | |
412 | UINTN Length;\r | |
413 | \r | |
414 | ASSERT (Buffer != NULL);\r | |
415 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r | |
416 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r | |
417 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
418 | \r | |
419 | Length = SMBUS_LIB_LENGTH (SmBusAddress);\r | |
420 | return InternalSmBusExec (EfiSmbusWriteBlock, SmBusAddress, Length, Buffer, Status);\r | |
421 | }\r | |
422 | \r | |
423 | /**\r | |
424 | Executes an SMBUS block process call command.\r | |
425 | \r | |
426 | Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress.\r | |
427 | The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r | |
428 | Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer.\r | |
429 | If Status is not NULL, then the status of the executed command is returned in Status.\r | |
430 | It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read.\r | |
431 | SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r | |
432 | If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r | |
433 | If WriteBuffer is NULL, then ASSERT().\r | |
434 | If ReadBuffer is NULL, then ASSERT().\r | |
435 | If any reserved bits of SmBusAddress are set, then ASSERT().\r | |
436 | \r | |
437 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r | |
438 | SMBUS Command, SMBUS Data Length, and PEC.\r | |
439 | @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.\r | |
440 | @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.\r | |
441 | @param Status Return status for the executed command.\r | |
442 | This is an optional parameter and may be NULL.\r | |
443 | \r | |
444 | @return The number of bytes written.\r | |
445 | \r | |
446 | **/\r | |
447 | UINTN\r | |
448 | EFIAPI\r | |
449 | SmBusBlockProcessCall (\r | |
450 | IN UINTN SmBusAddress,\r | |
451 | IN VOID *WriteBuffer,\r | |
452 | OUT VOID *ReadBuffer,\r | |
453 | OUT RETURN_STATUS *Status OPTIONAL\r | |
454 | )\r | |
455 | {\r | |
456 | UINTN Length;\r | |
457 | \r | |
458 | ASSERT (WriteBuffer != NULL);\r | |
459 | ASSERT (ReadBuffer != NULL);\r | |
460 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r | |
461 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r | |
462 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r | |
463 | \r | |
464 | Length = SMBUS_LIB_LENGTH (SmBusAddress);\r | |
465 | //\r | |
466 | // Assuming that ReadBuffer is large enough to save another memory copy.\r | |
467 | //\r | |
468 | ReadBuffer = CopyMem (ReadBuffer, WriteBuffer, Length);\r | |
469 | return InternalSmBusExec (EfiSmbusBWBRProcessCall, SmBusAddress, Length, ReadBuffer, Status);\r | |
470 | }\r |