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233 lines
11 KiB
C
233 lines
11 KiB
C
/** @file
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This file declares the Smbus PPI, which provides the basic I/O interfaces that a PEIM
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uses to access its SMBus controller and the slave devices attached to it.
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Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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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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@par Revision Reference:
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This PPI is defined in Framework of EFI SmBus PPI spec.
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Version 0.9.
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**/
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#ifndef _PEI_SMBUS_PPI_H_
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#define _PEI_SMBUS_PPI_H_
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#include <Ppi/Smbus2.h>
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#define EFI_PEI_SMBUS_PPI_GUID \
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{ \
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0xabd42895, 0x78cf, 0x4872, {0x84, 0x44, 0x1b, 0x5c, 0x18, 0xb, 0xfb, 0xda } \
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}
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typedef struct _EFI_PEI_SMBUS_PPI EFI_PEI_SMBUS_PPI;
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/**
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Executes an SMBus operation to an SMBus controller.
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@param[in] PeiServices A pointer to the system PEI Services Table.
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@param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.
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@param[in] SlaveAddress The SMBUS hardware address to which the SMBUS
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device is preassigned or allocated.
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@param[in] Command This command is transmitted by the SMBus host
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controller to the SMBus slave device, and the
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interpretation is SMBus slave device specific.
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@param[in] Operation Signifies which particular SMBus hardware protocol
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instance to use to execute the SMBus transactions.
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@param[in] PecCheck Defines if Packet Error Code (PEC) checking is
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required for this operation.
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@param[in, out] Length The number of bytes for this operation.
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@param[in, out] Buffer Contains the value of data to execute to the SMBus
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slave device.
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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 a failure
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was recorded in the Host Status Register bit.
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@retval EFI_INVALID_PARAMETER The operation is not defined in EFI_SMBUS_OPERATION.
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@retval EFI_INVALID_PARAMETER Length/Buffer is NULL for operations except for
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EfiSmbusQuickRead and EfiSmbusQuickWrite. Length
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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_SMBUS_PPI_EXECUTE_OPERATION)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_SMBUS_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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This function is user-defined, and is called when the SlaveAddress/Data pair happens.
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@param[in] PeiServices A pointer to the system PEI Services Table.
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@param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.
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@param[in] SlaveAddress The SMBUS hardware address to which the SMBUS
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device is preassigned or allocated.
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@param[in] Data Data of the SMBus host notify command, which denotes that
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the caller wants to be called.
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@return Status Code returned by callback function.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS_NOTIFY_FUNCTION)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_SMBUS_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 ArpDevice() function enumerates either the entire bus or a specific
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device identified by SmbusUdid.
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@param[in] PeiServices A pointer to the system PEI Services Table.
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@param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.
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@param[in] ArpAll A Boolean expression that indicates if the host
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drivers need to enumerate all the devices or to
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enumerate only the device that is identified
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by SmbusUdid. If ArpAll is TRUE, SmbusUdid and
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SlaveAddress are optional and ignored if entered.
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If ArpAll is FALSE, ArpDevice will enumerate
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SmbusUdid, and the address will be at SlaveAddress.
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@param[in] SmbusUdid The targeted SMBus Unique Device Identifier (UDID).
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The UDID may not exist for SMBus devices with fixed
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addresses.
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@param[in, out] SlaveAddress The new SMBus address for the slave device for
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which the operation is targeted.
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This address may be NULL.
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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() is not implemented by this PEIM.
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This return value is not defined in the Framework Specification.
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This return value was introduced in the PI Specification.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS_PPI_ARP_DEVICE)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_SMBUS_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[in] PeiServices A pointer to the system PEI Services Table.
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@param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.
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@param[in, out] Length The size of the buffer that contains the SMBus device map.
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@param[in, out] 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 GetArpMap() are not implemented by this PEIM.
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This return value was not defined in the Framework Specification.
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This return value was introduced in the PI Specification.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS_PPI_GET_ARP_MAP)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_SMBUS_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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Allows a device driver to register for a callback when the bus driver detects a state that it needs to
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propagate to other PEIMs that are registered for a callback.
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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 occur.
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All functions to be registered with EFI_PEI_SMBUS_PPI_NOTIFY must be of type
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EFI_PEI_SMBUS_NOTIFY_FUNCTION.
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@param[in] PeiServices A pointer to the system PEI Services Table.
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@param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.
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@param[in] SlaveAddress The address that the host controller detects as
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sending a message and triggers all the registered functions.
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@param[in] Data Data that the host controller detects as sending a message
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and triggers all the registered functions.
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@param[in] 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 Notify() are not implemented by this PEIM.
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This return value is not defined in the Framework Specification.
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This return value was introduced in the PI Specification.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_SMBUS_PPI_NOTIFY)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_SMBUS_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_NOTIFY_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_SMBUS_PPI {
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///
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/// Executes the SMBus operation to an SMBus slave device.
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///
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EFI_PEI_SMBUS_PPI_EXECUTE_OPERATION Execute;
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///
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/// Allows an SMBus 2.0 device(s) to be Address Resolution Protocol (ARP)
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///
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EFI_PEI_SMBUS_PPI_ARP_DEVICE ArpDevice;
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///
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/// Allows a PEIM to retrieve the address that was allocated by the SMBus
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/// host controller during enumeration/ARP.
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///
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EFI_PEI_SMBUS_PPI_GET_ARP_MAP GetArpMap;
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///
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/// Allows a driver to register for a callback to the SMBus host
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/// controller driver when the bus issues a notification to the bus controller PEIM.
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///
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EFI_PEI_SMBUS_PPI_NOTIFY Notify;
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};
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extern EFI_GUID gEfiPeiSmbusPpiGuid;
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#endif
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