+++ /dev/null
-/** @file\r
-Implementation of SmBusLib class library for PEI phase.\r
-\r
-Copyright (c) 2006, Intel Corporation<BR>\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
-\r
-Module Name: SmbusLib.c\r
-\r
-**/\r
-\r
-#include "InternalSmbusLib.h"\r
-\r
-/**\r
- Executes an SMBUS quick read command.\r
-\r
- Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address field of SmBusAddress is required.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If PEC is set in SmBusAddress, then ASSERT().\r
- If Command in SmBusAddress is not zero, then ASSERT().\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-SmBusQuickRead (\r
- IN UINTN SmBusAddress,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusQuickRead, SmBusAddress, 0, NULL, Status);\r
-}\r
-\r
-/**\r
- Executes an SMBUS quick write command.\r
-\r
- Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address field of SmBusAddress is required.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If PEC is set in SmBusAddress, then ASSERT().\r
- If Command in SmBusAddress is not zero, then ASSERT().\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-SmBusQuickWrite (\r
- IN UINTN SmBusAddress,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- ASSERT (!SMBUS_LIB_PEC (SmBusAddress));\r
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusQuickWrite, SmBusAddress, 0, NULL, Status);\r
-}\r
-\r
-/**\r
- Executes an SMBUS receive byte command.\r
-\r
- Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address field of SmBusAddress is required.\r
- The byte received from the SMBUS is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Command in SmBusAddress is not zero, then ASSERT().\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The byte received from the SMBUS.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-SmBusReceiveByte (\r
- IN UINTN SmBusAddress,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT8 Byte;\r
-\r
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusReceiveByte, SmBusAddress, 1, &Byte, Status);\r
-\r
- return Byte;\r
-}\r
-\r
-/**\r
- Executes an SMBUS send byte command.\r
-\r
- Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress.\r
- The byte specified by Value is sent.\r
- Only the SMBUS slave address field of SmBusAddress is required. Value is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Command in SmBusAddress is not zero, then ASSERT().\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Value The 8-bit value to send.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The parameter of Value.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-SmBusSendByte (\r
- IN UINTN SmBusAddress,\r
- IN UINT8 Value,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT8 Byte;\r
-\r
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- Byte = Value;\r
- InternalSmBusExec (EfiSmbusSendByte, SmBusAddress, 1, &Byte, Status);\r
-\r
- return Value;\r
-}\r
-\r
-/**\r
- Executes an SMBUS read data byte command.\r
-\r
- Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- The 8-bit value read from the SMBUS is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The byte read from the SMBUS.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-SmBusReadDataByte (\r
- IN UINTN SmBusAddress,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT8 Byte;\r
-\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusReadByte, SmBusAddress, 1, &Byte, Status);\r
- \r
- return Byte;\r
-}\r
-\r
-/**\r
- Executes an SMBUS write data byte command.\r
-\r
- Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress.\r
- The 8-bit value specified by Value is written.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- Value is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Value The 8-bit value to write.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The parameter of Value.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-SmBusWriteDataByte (\r
- IN UINTN SmBusAddress,\r
- IN UINT8 Value,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT8 Byte;\r
-\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- Byte = Value;\r
- InternalSmBusExec (EfiSmbusWriteByte, SmBusAddress, 1, &Byte, Status);\r
- \r
- return Value;\r
-}\r
-\r
-/**\r
- Executes an SMBUS read data word command.\r
-\r
- Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- The 16-bit value read from the SMBUS is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
- \r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The byte read from the SMBUS.\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-SmBusReadDataWord (\r
- IN UINTN SmBusAddress,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT16 Word;\r
-\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusReadWord, SmBusAddress, 2, &Word, Status);\r
- \r
- return Word;\r
-}\r
-\r
-/**\r
- Executes an SMBUS write data word command.\r
-\r
- Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress.\r
- The 16-bit value specified by Value is written.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- Value is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Value The 16-bit value to write.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The parameter of Value.\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-SmBusWriteDataWord (\r
- IN UINTN SmBusAddress,\r
- IN UINT16 Value,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINT16 Word;\r
-\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- Word = Value;\r
- InternalSmBusExec (EfiSmbusWriteWord, SmBusAddress, 2, &Word, Status);\r
-\r
- return Value;\r
-}\r
-\r
-/**\r
- Executes an SMBUS process call command.\r
-\r
- Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress.\r
- The 16-bit value specified by Value is written.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- The 16-bit value returned by the process call command is returned.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Value The 16-bit value to write.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The 16-bit value returned by the process call command.\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-SmBusProcessCall (\r
- IN UINTN SmBusAddress,\r
- IN UINT16 Value,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- InternalSmBusExec (EfiSmbusProcessCall, SmBusAddress, 2, &Value, Status);\r
- \r
- return Value;\r
-}\r
-\r
-/**\r
- Executes an SMBUS read block command.\r
-\r
- Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress.\r
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.\r
- Bytes are read from the SMBUS and stored in Buffer.\r
- The number of bytes read is returned, and will never return a value larger than 32-bytes.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.\r
- SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r
- If Length in SmBusAddress is not zero, then ASSERT().\r
- If Buffer is NULL, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The number of bytes read.\r
-\r
-**/\r
-UINTN\r
-EFIAPI\r
-SmBusReadBlock (\r
- IN UINTN SmBusAddress,\r
- OUT VOID *Buffer,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- ASSERT (Buffer != NULL);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- return InternalSmBusExec (EfiSmbusReadBlock, SmBusAddress, 0x20, Buffer, Status);\r
-}\r
-\r
-/**\r
- Executes an SMBUS write block command.\r
-\r
- Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress.\r
- The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r
- Bytes are written to the SMBUS from Buffer.\r
- The number of bytes written is returned, and will never return a value larger than 32-bytes.\r
- If Status is not NULL, then the status of the executed command is returned in Status. \r
- If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r
- If Buffer is NULL, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The number of bytes written.\r
-\r
-**/\r
-UINTN\r
-EFIAPI\r
-SmBusWriteBlock (\r
- IN UINTN SmBusAddress,\r
- OUT VOID *Buffer,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINTN Length;\r
-\r
- ASSERT (Buffer != NULL);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- Length = SMBUS_LIB_LENGTH (SmBusAddress);\r
- return InternalSmBusExec (EfiSmbusWriteBlock, SmBusAddress, Length, Buffer, Status);\r
-}\r
-\r
-/**\r
- Executes an SMBUS block process call command.\r
-\r
- Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress.\r
- The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.\r
- Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer.\r
- If Status is not NULL, then the status of the executed command is returned in Status.\r
- It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read.\r
- SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.\r
- If Length in SmBusAddress is zero or greater than 32, then ASSERT().\r
- If WriteBuffer is NULL, then ASSERT().\r
- If ReadBuffer is NULL, then ASSERT().\r
- If any reserved bits of SmBusAddress are set, then ASSERT().\r
-\r
- @param SmBusAddress Address that encodes the SMBUS Slave Address,\r
- SMBUS Command, SMBUS Data Length, and PEC.\r
- @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.\r
- @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.\r
- @param Status Return status for the executed command.\r
- This is an optional parameter and may be NULL.\r
-\r
- @return The number of bytes written.\r
-\r
-**/\r
-UINTN\r
-EFIAPI\r
-SmBusBlockProcessCall (\r
- IN UINTN SmBusAddress,\r
- IN VOID *WriteBuffer,\r
- OUT VOID *ReadBuffer,\r
- OUT RETURN_STATUS *Status OPTIONAL\r
- )\r
-{\r
- UINTN Length;\r
-\r
- ASSERT (WriteBuffer != NULL);\r
- ASSERT (ReadBuffer != NULL);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);\r
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);\r
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);\r
-\r
- Length = SMBUS_LIB_LENGTH (SmBusAddress);\r
- //\r
- // Assuming that ReadBuffer is large enough to save another memory copy.\r
- //\r
- ReadBuffer = CopyMem (ReadBuffer, WriteBuffer, Length);\r
- return InternalSmBusExec (EfiSmbusBWBRProcessCall, SmBusAddress, Length, ReadBuffer, Status);\r
-}\r
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