| 3eb9473e |
1 | /*++\r |
| 2 | \r |
| 3 | Copyright (c) 2004 - 2006, Intel Corporation \r |
| 4 | All rights reserved. This program and the accompanying materials \r |
| 5 | are licensed and made available under the terms and conditions of the BSD License \r |
| 6 | which accompanies this distribution. The full text of the license may be found at \r |
| 7 | http://opensource.org/licenses/bsd-license.php \r |
| 8 | \r |
| 9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
| 10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
| 11 | \r |
| 12 | \r |
| 13 | Module Name:\r |
| 14 | \r |
| 15 | DxeSmbus.c\r |
| 16 | \r |
| 17 | Abstract: \r |
| 18 | \r |
| 19 | Dxe Smbus Lib Interfaces\r |
| 20 | \r |
| 21 | --*/\r |
| 22 | \r |
| 23 | #include "DxeSmbusLibInternal.h"\r |
| 24 | \r |
| 25 | /**\r |
| 26 | Executes an SMBUS quick read command.\r |
| 27 | \r |
| 28 | Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress.\r |
| 29 | Only the SMBUS slave address field of SmBusAddress is required.\r |
| 30 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 31 | If PEC is set in SmBusAddress, then ASSERT().\r |
| 32 | If Command in SmBusAddress is not zero, then ASSERT().\r |
| 33 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 34 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 35 | \r |
| 36 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 37 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 38 | @param Status Return status for the executed command.\r |
| 39 | This is an optional parameter and may be NULL.\r |
| 40 | \r |
| 41 | **/\r |
| 42 | VOID\r |
| 43 | EFIAPI\r |
| 44 | SmBusQuickRead (\r |
| 45 | IN UINTN SmBusAddress,\r |
| 46 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 47 | )\r |
| 48 | {\r |
| 49 | ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r |
| 50 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r |
| 51 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 52 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 53 | \r |
| 54 | InternalSmBusExec (EfiSmbusQuickRead, SmBusAddress, 0, NULL, Status);\r |
| 55 | }\r |
| 56 | \r |
| 57 | /**\r |
| 58 | Executes an SMBUS quick write command.\r |
| 59 | \r |
| 60 | Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress.\r |
| 61 | Only the SMBUS slave address field of SmBusAddress is required.\r |
| 62 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 63 | If PEC is set in SmBusAddress, then ASSERT().\r |
| 64 | If Command in SmBusAddress is not zero, then ASSERT().\r |
| 65 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 66 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 67 | \r |
| 68 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 69 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 70 | @param Status Return status for the executed command.\r |
| 71 | This is an optional parameter and may be NULL.\r |
| 72 | \r |
| 73 | **/\r |
| 74 | VOID\r |
| 75 | EFIAPI\r |
| 76 | SmBusQuickWrite (\r |
| 77 | IN UINTN SmBusAddress,\r |
| 78 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 79 | )\r |
| 80 | {\r |
| 81 | ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r |
| 82 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r |
| 83 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 84 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 85 | \r |
| 86 | InternalSmBusExec (EfiSmbusQuickWrite, SmBusAddress, 0, NULL, Status);\r |
| 87 | }\r |
| 88 | \r |
| 89 | /**\r |
| 90 | Executes an SMBUS receive byte command.\r |
| 91 | \r |
| 92 | Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress.\r |
| 93 | Only the SMBUS slave address field of SmBusAddress is required.\r |
| 94 | The byte received from the SMBUS is returned.\r |
| 95 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 96 | If Command in SmBusAddress is not zero, then ASSERT().\r |
| 97 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 98 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 99 | \r |
| 100 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 101 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 102 | @param Status Return status for the executed command.\r |
| 103 | This is an optional parameter and may be NULL.\r |
| 104 | \r |
| 105 | @return The byte received from the SMBUS.\r |
| 106 | \r |
| 107 | **/\r |
| 108 | UINT8\r |
| 109 | EFIAPI\r |
| 110 | SmBusReceiveByte (\r |
| 111 | IN UINTN SmBusAddress,\r |
| 112 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 113 | )\r |
| 114 | {\r |
| 115 | UINT8 Byte;\r |
| 116 | \r |
| 117 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r |
| 118 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 119 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 120 | \r |
| 121 | InternalSmBusExec (EfiSmbusReceiveByte, SmBusAddress, 1, &Byte, Status);\r |
| 122 | \r |
| 123 | return Byte;\r |
| 124 | }\r |
| 125 | \r |
| 126 | /**\r |
| 127 | Executes an SMBUS send byte command.\r |
| 128 | \r |
| 129 | Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress.\r |
| 130 | The byte specified by Value is sent.\r |
| 131 | Only the SMBUS slave address field of SmBusAddress is required. Value is returned.\r |
| 132 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 133 | If Command in SmBusAddress is not zero, then ASSERT().\r |
| 134 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 135 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 136 | \r |
| 137 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 138 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 139 | @param Value The 8-bit value to send.\r |
| 140 | @param Status Return status for the executed command.\r |
| 141 | This is an optional parameter and may be NULL.\r |
| 142 | \r |
| 143 | @return The parameter of Value.\r |
| 144 | \r |
| 145 | **/\r |
| 146 | UINT8\r |
| 147 | EFIAPI\r |
| 148 | SmBusSendByte (\r |
| 149 | IN UINTN SmBusAddress,\r |
| 150 | IN UINT8 Value,\r |
| 151 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 152 | )\r |
| 153 | {\r |
| 154 | UINT8 Byte;\r |
| 155 | \r |
| 156 | ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r |
| 157 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 158 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 159 | \r |
| 160 | Byte = Value;\r |
| 161 | InternalSmBusExec (EfiSmbusSendByte, SmBusAddress, 1, &Byte, Status);\r |
| 162 | \r |
| 163 | return Value;\r |
| 164 | }\r |
| 165 | \r |
| 166 | /**\r |
| 167 | Executes an SMBUS read data byte command.\r |
| 168 | \r |
| 169 | Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress.\r |
| 170 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 171 | The 8-bit value read from the SMBUS is returned.\r |
| 172 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 173 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 174 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 175 | \r |
| 176 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 177 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 178 | @param Status Return status for the executed command.\r |
| 179 | This is an optional parameter and may be NULL.\r |
| 180 | \r |
| 181 | @return The byte read from the SMBUS.\r |
| 182 | \r |
| 183 | **/\r |
| 184 | UINT8\r |
| 185 | EFIAPI\r |
| 186 | SmBusReadDataByte (\r |
| 187 | IN UINTN SmBusAddress,\r |
| 188 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 189 | )\r |
| 190 | {\r |
| 191 | UINT8 Byte;\r |
| 192 | \r |
| 193 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 194 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 195 | \r |
| 196 | InternalSmBusExec (EfiSmbusReadByte, SmBusAddress, 1, &Byte, Status);\r |
| 197 | \r |
| 198 | return Byte;\r |
| 199 | }\r |
| 200 | \r |
| 201 | /**\r |
| 202 | Executes an SMBUS write data byte command.\r |
| 203 | \r |
| 204 | Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress.\r |
| 205 | The 8-bit value specified by Value is written.\r |
| 206 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 207 | Value is returned.\r |
| 208 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 209 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 210 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 211 | \r |
| 212 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 213 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 214 | @param Value The 8-bit value to write.\r |
| 215 | @param Status Return status for the executed command.\r |
| 216 | This is an optional parameter and may be NULL.\r |
| 217 | \r |
| 218 | @return The parameter of Value.\r |
| 219 | \r |
| 220 | **/\r |
| 221 | UINT8\r |
| 222 | EFIAPI\r |
| 223 | SmBusWriteDataByte (\r |
| 224 | IN UINTN SmBusAddress,\r |
| 225 | IN UINT8 Value,\r |
| 226 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 227 | )\r |
| 228 | {\r |
| 229 | UINT8 Byte;\r |
| 230 | \r |
| 231 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 232 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 233 | \r |
| 234 | Byte = Value;\r |
| 235 | InternalSmBusExec (EfiSmbusWriteByte, SmBusAddress, 1, &Byte, Status);\r |
| 236 | \r |
| 237 | return Value;\r |
| 238 | }\r |
| 239 | \r |
| 240 | /**\r |
| 241 | Executes an SMBUS read data word command.\r |
| 242 | \r |
| 243 | Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress.\r |
| 244 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 245 | The 16-bit value read from the SMBUS is returned.\r |
| 246 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 247 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 248 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 249 | \r |
| 250 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 251 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 252 | @param Status Return status for the executed command.\r |
| 253 | This is an optional parameter and may be NULL.\r |
| 254 | \r |
| 255 | @return The byte read from the SMBUS.\r |
| 256 | \r |
| 257 | **/\r |
| 258 | UINT16\r |
| 259 | EFIAPI\r |
| 260 | SmBusReadDataWord (\r |
| 261 | IN UINTN SmBusAddress,\r |
| 262 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 263 | )\r |
| 264 | {\r |
| 265 | UINT16 Word;\r |
| 266 | \r |
| 267 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 268 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 269 | \r |
| 270 | InternalSmBusExec (EfiSmbusReadWord, SmBusAddress, 2, &Word, Status);\r |
| 271 | \r |
| 272 | return Word;\r |
| 273 | }\r |
| 274 | \r |
| 275 | /**\r |
| 276 | Executes an SMBUS write data word command.\r |
| 277 | \r |
| 278 | Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress.\r |
| 279 | The 16-bit value specified by Value is written.\r |
| 280 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 281 | Value is returned.\r |
| 282 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 283 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 284 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 285 | \r |
| 286 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 287 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 288 | @param Value The 16-bit value to write.\r |
| 289 | @param Status Return status for the executed command.\r |
| 290 | This is an optional parameter and may be NULL.\r |
| 291 | \r |
| 292 | @return The parameter of Value.\r |
| 293 | \r |
| 294 | **/\r |
| 295 | UINT16\r |
| 296 | EFIAPI\r |
| 297 | SmBusWriteDataWord (\r |
| 298 | IN UINTN SmBusAddress,\r |
| 299 | IN UINT16 Value,\r |
| 300 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 301 | )\r |
| 302 | {\r |
| 303 | UINT16 Word;\r |
| 304 | \r |
| 305 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 306 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 307 | \r |
| 308 | Word = Value;\r |
| 309 | InternalSmBusExec (EfiSmbusWriteWord, SmBusAddress, 2, &Word, Status);\r |
| 310 | \r |
| 311 | return Value;\r |
| 312 | }\r |
| 313 | \r |
| 314 | /**\r |
| 315 | Executes an SMBUS process call command.\r |
| 316 | \r |
| 317 | Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress.\r |
| 318 | The 16-bit value specified by Value is written.\r |
| 319 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 320 | The 16-bit value returned by the process call command is returned.\r |
| 321 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 322 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 323 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 324 | \r |
| 325 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 326 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 327 | @param Value The 16-bit value to write.\r |
| 328 | @param Status Return status for the executed command.\r |
| 329 | This is an optional parameter and may be NULL.\r |
| 330 | \r |
| 331 | @return The 16-bit value returned by the process call command.\r |
| 332 | \r |
| 333 | **/\r |
| 334 | UINT16\r |
| 335 | EFIAPI\r |
| 336 | SmBusProcessCall (\r |
| 337 | IN UINTN SmBusAddress,\r |
| 338 | IN UINT16 Value,\r |
| 339 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 340 | )\r |
| 341 | {\r |
| 342 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 343 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 344 | \r |
| 345 | InternalSmBusExec (EfiSmbusProcessCall, SmBusAddress, 2, &Value, Status);\r |
| 346 | \r |
| 347 | return Value;\r |
| 348 | }\r |
| 349 | \r |
| 350 | /**\r |
| 351 | Executes an SMBUS read block command.\r |
| 352 | \r |
| 353 | Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress.\r |
| 354 | Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r |
| 355 | Bytes are read from the SMBUS and stored in Buffer.\r |
| 356 | The number of bytes read is returned, and will never return a value larger than 32-bytes.\r |
| 357 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 358 | It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.\r |
| 359 | SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r |
| 360 | If Length in SmBusAddress is not zero, then ASSERT().\r |
| 361 | If Buffer is NULL, then ASSERT().\r |
| 362 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 363 | \r |
| 364 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 365 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 366 | @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r |
| 367 | @param Status Return status for the executed command.\r |
| 368 | This is an optional parameter and may be NULL.\r |
| 369 | \r |
| 370 | @return The number of bytes read.\r |
| 371 | \r |
| 372 | **/\r |
| 373 | UINTN\r |
| 374 | EFIAPI\r |
| 375 | SmBusReadBlock (\r |
| 376 | IN UINTN SmBusAddress,\r |
| 377 | OUT VOID *Buffer,\r |
| 378 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 379 | )\r |
| 380 | {\r |
| 381 | ASSERT (Buffer != NULL);\r |
| 382 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r |
| 383 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 384 | \r |
| 385 | return InternalSmBusExec (EfiSmbusReadBlock, SmBusAddress, 0x20, Buffer, Status);\r |
| 386 | }\r |
| 387 | \r |
| 388 | /**\r |
| 389 | Executes an SMBUS write block command.\r |
| 390 | \r |
| 391 | Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress.\r |
| 392 | The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r |
| 393 | Bytes are written to the SMBUS from Buffer.\r |
| 394 | The number of bytes written is returned, and will never return a value larger than 32-bytes.\r |
| 395 | If Status is not NULL, then the status of the executed command is returned in Status. \r |
| 396 | If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r |
| 397 | If Buffer is NULL, then ASSERT().\r |
| 398 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 399 | \r |
| 400 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 401 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 402 | @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r |
| 403 | @param Status Return status for the executed command.\r |
| 404 | This is an optional parameter and may be NULL.\r |
| 405 | \r |
| 406 | @return The number of bytes written.\r |
| 407 | \r |
| 408 | **/\r |
| 409 | UINTN\r |
| 410 | EFIAPI\r |
| 411 | SmBusWriteBlock (\r |
| 412 | IN UINTN SmBusAddress,\r |
| 413 | OUT VOID *Buffer,\r |
| 414 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 415 | )\r |
| 416 | {\r |
| 417 | UINTN Length;\r |
| 418 | \r |
| 419 | ASSERT (Buffer != NULL);\r |
| 420 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r |
| 421 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r |
| 422 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 423 | \r |
| 424 | Length = SMBUS_LIB_LENGTH (SmBusAddress);\r |
| 425 | return InternalSmBusExec (EfiSmbusWriteBlock, SmBusAddress, Length, Buffer, Status);\r |
| 426 | }\r |
| 427 | \r |
| 428 | /**\r |
| 429 | Executes an SMBUS block process call command.\r |
| 430 | \r |
| 431 | Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress.\r |
| 432 | The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r |
| 433 | Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer.\r |
| 434 | If Status is not NULL, then the status of the executed command is returned in Status.\r |
| 435 | It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read.\r |
| 436 | SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r |
| 437 | If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r |
| 438 | If WriteBuffer is NULL, then ASSERT().\r |
| 439 | If ReadBuffer is NULL, then ASSERT().\r |
| 440 | If any reserved bits of SmBusAddress are set, then ASSERT().\r |
| 441 | \r |
| 442 | @param SmBusAddress Address that encodes the SMBUS Slave Address,\r |
| 443 | SMBUS Command, SMBUS Data Length, and PEC.\r |
| 444 | @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.\r |
| 445 | @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.\r |
| 446 | @param Status Return status for the executed command.\r |
| 447 | This is an optional parameter and may be NULL.\r |
| 448 | \r |
| 449 | @return The number of bytes written.\r |
| 450 | \r |
| 451 | **/\r |
| 452 | UINTN\r |
| 453 | EFIAPI\r |
| 454 | SmBusBlockProcessCall (\r |
| 455 | IN UINTN SmBusAddress,\r |
| 456 | IN VOID *WriteBuffer,\r |
| 457 | OUT VOID *ReadBuffer,\r |
| 458 | OUT RETURN_STATUS *Status OPTIONAL\r |
| 459 | )\r |
| 460 | {\r |
| 461 | UINTN Length;\r |
| 462 | \r |
| 463 | ASSERT (WriteBuffer != NULL);\r |
| 464 | ASSERT (ReadBuffer != NULL);\r |
| 465 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r |
| 466 | ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r |
| 467 | ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r |
| 468 | \r |
| 469 | Length = SMBUS_LIB_LENGTH (SmBusAddress);\r |
| 470 | //\r |
| 471 | // Assuming that ReadBuffer is large enough to save another memory copy.\r |
| 472 | //\r |
| 473 | ReadBuffer = CopyMem (ReadBuffer, WriteBuffer, Length);\r |
| 474 | return InternalSmBusExec (EfiSmbusBWBRProcessCall, SmBusAddress, Length, ReadBuffer, Status);\r |
| 475 | }\r |
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