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198 lines
9.0 KiB
C
198 lines
9.0 KiB
C
/** @file
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This file declares Smbus2 PPI.
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This PPI provides the basic I/O interfaces that a PEIM uses to access its
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SMBus controller and the slave devices attached to it.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This PPI is introduced in PI Version 1.0.
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**/
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#ifndef __PEI_SMBUS2_PPI_H__
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#define __PEI_SMBUS2_PPI_H__
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#include <IndustryStandard/SmBus.h>
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#define EFI_PEI_SMBUS2_PPI_GUID \
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{ 0x9ca93627, 0xb65b, 0x4324, { 0xa2, 0x2, 0xc0, 0xb4, 0x61, 0x76, 0x45, 0x43 } }
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typedef struct _EFI_PEI_SMBUS2_PPI EFI_PEI_SMBUS2_PPI;
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/**
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Executes an SMBus operation to an SMBus controller. Returns when either
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the command has been executed or an error is encountered in doing the operation.
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@param This A pointer to the EFI_PEI_SMBUS2_PPI instance.
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@param SlaveAddress The SMBUS hardware address to which the SMBUS device is preassigned or
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allocated.
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@param Command This command is transmitted by the SMBus host controller to the SMBus slave
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device and the interpretation is SMBus slave device specific.
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It can mean the offset to a list of functions inside
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an SMBus slave device. Not all operations or slave devices support
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this command's registers.
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@param Operation Signifies which particular SMBus hardware protocol instance that it
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will use to execute the SMBus transactions.
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This SMBus hardware protocol is defined by the System Management Bus (SMBus)
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Specification and is not related to UEFI.
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@param PecCheck Defines if Packet Error Code (PEC) checking is required for this operation.
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@param Length Signifies the number of bytes that this operation will do.
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The maximum number of bytes can be revision specific and operation specific.
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This parameter will contain the actual number of bytes that are executed
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for this operation. Not all operations require this argument.
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@param Buffer Contains the value of data to execute to the SMBus slave device.
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Not all operations require this argument.
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The length of this buffer is identified by Length.
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@retval EFI_SUCCESS The last data that was returned from the access
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matched the poll exit criteria.
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@retval EFI_CRC_ERROR The checksum is not correct (PEC is incorrect)
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@retval EFI_TIMEOUT Timeout expired before the operation was completed.
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Timeout is determined by the SMBus host controller device.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed
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due to a lack of resources.
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@retval EFI_DEVICE_ERROR The request was not completed because
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a failure reflected in the Host Status Register bit.
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@retval EFI_INVALID_PARAMETER Operation is not defined in EFI_SMBUS_OPERATION.
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Or Length/Buffer is NULL for operations except for EfiSmbusQuickRead and
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EfiSmbusQuickWrite. Or Length is outside the range of valid values.
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@retval EFI_UNSUPPORTED The SMBus operation or PEC is not supported.
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@retval EFI_BUFFER_TOO_SMALL Buffer is not sufficient for this operation.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS2_PPI_EXECUTE_OPERATION)(
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IN CONST EFI_PEI_SMBUS2_PPI *This,
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IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
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IN EFI_SMBUS_DEVICE_COMMAND Command,
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IN EFI_SMBUS_OPERATION Operation,
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IN BOOLEAN PecCheck,
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IN OUT UINTN *Length,
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IN OUT VOID *Buffer
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);
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/**
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The ArpDevice() function enumerates the entire bus or enumerates a specific
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device that is identified by SmbusUdid.
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@param This A pointer to the EFI_PEI_SMBUS2_PPI instance.
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@param ArpAll A Boolean expression that indicates if the host drivers need
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to enumerate all the devices or enumerate only the device that is identified
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by SmbusUdid. If ArpAll is TRUE, SmbusUdid and SlaveAddress are optional.
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If ArpAll is FALSE, ArpDevice will enumerate SmbusUdid and the address
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will be at SlaveAddress.
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@param SmbusUdid The targeted SMBus Unique Device Identifier (UDID).
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The UDID may not exist for SMBus devices with fixed addresses.
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@param SlaveAddress The new SMBus address for the slave device for
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which the operation is targeted.
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@retval EFI_SUCCESS The SMBus slave device address was set.
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@retval EFI_INVALID_PARAMETER SlaveAddress is NULL.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed
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due to a lack of resources.
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@retval EFI_TIMEOUT The SMBus slave device did not respond.
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@retval EFI_DEVICE_ERROR The request was not completed because the transaction failed.
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@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not implemented by this PEIM.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS2_PPI_ARP_DEVICE)(
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IN CONST EFI_PEI_SMBUS2_PPI *This,
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IN BOOLEAN ArpAll,
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IN EFI_SMBUS_UDID *SmbusUdid, OPTIONAL
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IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL
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);
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/**
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The GetArpMap() function returns the mapping of all the SMBus devices
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that are enumerated by the SMBus host driver.
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@param This A pointer to the EFI_PEI_SMBUS2_PPI instance.
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@param Length Size of the buffer that contains the SMBus device map.
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@param SmbusDeviceMap The pointer to the device map as enumerated
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by the SMBus controller driver.
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@retval EFI_SUCCESS The device map was returned correctly in the buffer.
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@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not implemented by this PEIM.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS2_PPI_GET_ARP_MAP)(
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IN CONST EFI_PEI_SMBUS2_PPI *This,
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IN OUT UINTN *Length,
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IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap
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);
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/**
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CallBack function can be registered in EFI_PEI_SMBUS2_PPI_NOTIFY.
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@param This A pointer to the EFI_PEI_SMBUS2_PPI instance.
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@param SlaveAddress The SMBUS hardware address to which the SMBUS
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device is preassigned or allocated.
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@param Data Data of the SMBus host notify command that
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the caller wants to be called.
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@retval EFI_SUCCESS NotifyFunction has been registered.
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@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not
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implemented by this PEIM.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS_NOTIFY2_FUNCTION)(
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IN CONST EFI_PEI_SMBUS2_PPI *SmbusPpi,
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IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
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IN UINTN Data
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);
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/**
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The Notify() function registers all the callback functions to allow the
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bus driver to call these functions when the SlaveAddress/Data pair happens.
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@param This A pointer to the EFI_PEI_SMBUS2_PPI instance.
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@param SlaveAddress Address that the host controller detects as
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sending a message and calls all the registered functions.
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@param Data Data that the host controller detects as sending a message
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and calls all the registered functions.
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@param NotifyFunction The function to call when the bus driver
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detects the SlaveAddress and Data pair.
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@retval EFI_SUCCESS NotifyFunction has been registered.
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@retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not
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implemented by this PEIM.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS2_PPI_NOTIFY)(
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IN CONST EFI_PEI_SMBUS2_PPI *This,
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IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
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IN UINTN Data,
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IN EFI_PEI_SMBUS_NOTIFY2_FUNCTION NotifyFunction
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);
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///
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/// Provides the basic I/O interfaces that a PEIM uses to access
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/// its SMBus controller and the slave devices attached to it.
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///
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struct _EFI_PEI_SMBUS2_PPI {
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EFI_PEI_SMBUS2_PPI_EXECUTE_OPERATION Execute;
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EFI_PEI_SMBUS2_PPI_ARP_DEVICE ArpDevice;
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EFI_PEI_SMBUS2_PPI_GET_ARP_MAP GetArpMap;
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EFI_PEI_SMBUS2_PPI_NOTIFY Notify;
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///
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/// Identifier which uniquely identifies this SMBus controller in a system.
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///
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EFI_GUID Identifier;
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};
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extern EFI_GUID gEfiPeiSmbus2PpiGuid;
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#endif
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