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