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Diffstat (limited to 'MdePkg/Include/Library/SmbusLib.h')
| -rw-r--r-- | MdePkg/Include/Library/SmbusLib.h | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/SmbusLib.h b/MdePkg/Include/Library/SmbusLib.h new file mode 100644 index 0000000000..0520523bf1 --- /dev/null +++ b/MdePkg/Include/Library/SmbusLib.h @@ -0,0 +1,388 @@ +/** @file
+ SMBUS Functions
+
+ Copyright (c) 2006, Intel Corporation
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Module Name: SmbusLib.h
+
+**/
+
+#ifndef __SMBUS_LIB__
+#define __SMBUS_LIB__
+
+//
+// PEC BIT is bit 22 in SMBUS address
+//
+#define SMBUS_LIB_PEC_BIT (1 << 22)
+
+/**
+ Macro that converts SMBUS slave address, SMBUS command, SMBUS data length,
+ and PEC to a value that can be passed to the SMBUS Library functions.
+
+ Computes an address that is compatible with the SMBUS Library functions.
+ The unused upper bits of SlaveAddress, Command, and Length are stripped
+ prior to the generation of the address.
+
+ @param SlaveAddress SMBUS Slave Address. Range 0..127.
+ @param Command SMBUS Command. Range 0..255.
+ @param Length SMBUS Data Length. Range 0..32.
+ @param Pec TRUE if Packet Error Checking is enabled. Otherwise FALSE.
+
+**/
+#define SMBUS_LIB_ADDRESS(SlaveAddress,Command,Length,Pec) \
+ ( ((Pec) ? SMBUS_LIB_PEC_BIT: 0) | \
+ (((SlaveAddress) & 0x7f) << 1) | \
+ (((Command) & 0xff) << 8) | \
+ (((Length) & 0x3f) << 16) \
+ )
+
+/**
+ Executes an SMBUS quick read command.
+
+ Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address field of SmBusAddress is required.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If PEC is set in SmBusAddress, then ASSERT().
+ If Command in SmBusAddress is not zero, then ASSERT().
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+**/
+VOID
+EFIAPI
+SmBusQuickRead (
+ IN UINTN SmBusAddress,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS quick write command.
+
+ Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address field of SmBusAddress is required.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If PEC is set in SmBusAddress, then ASSERT().
+ If Command in SmBusAddress is not zero, then ASSERT().
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+**/
+VOID
+EFIAPI
+SmBusQuickWrite (
+ IN UINTN SmBusAddress,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS receive byte command.
+
+ Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address field of SmBusAddress is required.
+ The byte received from the SMBUS is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Command in SmBusAddress is not zero, then ASSERT().
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The byte received from the SMBUS.
+
+**/
+UINT8
+EFIAPI
+SmBusReceiveByte (
+ IN UINTN SmBusAddress,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS send byte command.
+
+ Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress.
+ The byte specified by Value is sent.
+ Only the SMBUS slave address field of SmBusAddress is required. Value is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Command in SmBusAddress is not zero, then ASSERT().
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Value The 8-bit value to send.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The parameter of Value.
+
+**/
+UINT8
+EFIAPI
+SmBusSendByte (
+ IN UINTN SmBusAddress,
+ IN UINT8 Value,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS read data byte command.
+
+ Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ The 8-bit value read from the SMBUS is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The byte read from the SMBUS.
+
+**/
+UINT8
+EFIAPI
+SmBusReadDataByte (
+ IN UINTN SmBusAddress,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS write data byte command.
+
+ Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress.
+ The 8-bit value specified by Value is written.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ Value is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Value The 8-bit value to write.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The parameter of Value.
+
+**/
+UINT8
+EFIAPI
+SmBusWriteDataByte (
+ IN UINTN SmBusAddress,
+ IN UINT8 Value,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS read data word command.
+
+ Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ The 16-bit value read from the SMBUS is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The byte read from the SMBUS.
+
+**/
+UINT16
+EFIAPI
+SmBusReadDataWord (
+ IN UINTN SmBusAddress,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS write data word command.
+
+ Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress.
+ The 16-bit value specified by Value is written.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ Value is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Value The 16-bit value to write.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The parameter of Value.
+
+**/
+UINT16
+EFIAPI
+SmBusWriteDataWord (
+ IN UINTN SmBusAddress,
+ IN UINT16 Value,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS process call command.
+
+ Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress.
+ The 16-bit value specified by Value is written.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ The 16-bit value returned by the process call command is returned.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Value The 16-bit value to write.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The 16-bit value returned by the process call command.
+
+**/
+UINT16
+EFIAPI
+SmBusProcessCall (
+ IN UINTN SmBusAddress,
+ IN UINT16 Value,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS read block command.
+
+ Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress.
+ Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
+ Bytes are read from the SMBUS and stored in Buffer.
+ The number of bytes read is returned, and will never return a value larger than 32-bytes.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+ SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.
+ If Length in SmBusAddress is not zero, then ASSERT().
+ If Buffer is NULL, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The number of bytes read.
+
+**/
+UINTN
+EFIAPI
+SmBusReadBlock (
+ IN UINTN SmBusAddress,
+ OUT VOID *Buffer,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS write block command.
+
+ Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress.
+ The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.
+ Bytes are written to the SMBUS from Buffer.
+ The number of bytes written is returned, and will never return a value larger than 32-bytes.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ If Length in SmBusAddress is zero or greater than 32, then ASSERT().
+ If Buffer is NULL, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The number of bytes written.
+
+**/
+UINTN
+EFIAPI
+SmBusWriteBlock (
+ IN UINTN SmBusAddress,
+ OUT VOID *Buffer,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+/**
+ Executes an SMBUS block process call command.
+
+ Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress.
+ The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.
+ Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer.
+ If Status is not NULL, then the status of the executed command is returned in Status.
+ It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read.
+ SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.
+ If Length in SmBusAddress is zero or greater than 32, then ASSERT().
+ If WriteBuffer is NULL, then ASSERT().
+ If ReadBuffer is NULL, then ASSERT().
+ If any reserved bits of SmBusAddress are set, then ASSERT().
+
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.
+ @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The number of bytes written.
+
+**/
+UINTN
+EFIAPI
+SmBusBlockProcessCall (
+ IN UINTN SmBusAddress,
+ IN VOID *WriteBuffer,
+ OUT VOID *ReadBuffer,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+;
+
+
+#endif
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