| /** @file |
| This file declares Smbus2 PPI. |
| This PPI provides the basic I/O interfaces that a PEIM uses to access its |
| SMBus controller and the slave devices attached to it. |
| |
| Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> |
| 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. |
| |
| @par Revision Reference: |
| This PPI is introduced in PI Version 1.0. |
| |
| **/ |
| |
| #ifndef __PEI_SMBUS2_PPI_H__ |
| #define __PEI_SMBUS2_PPI_H__ |
| |
| #include <IndustryStandard/SmBus.h> |
| |
| #define EFI_PEI_SMBUS2_PPI_GUID \ |
| { 0x9ca93627, 0xb65b, 0x4324, { 0xa2, 0x2, 0xc0, 0xb4, 0x61, 0x76, 0x45, 0x43 } } |
| |
| |
| typedef struct _EFI_PEI_SMBUS2_PPI EFI_PEI_SMBUS2_PPI; |
| |
| /** |
| Executes an SMBus operation to an SMBus controller. Returns when either |
| the command has been executed or an error is encountered in doing the operation. |
| |
| @param This A pointer to the EFI_PEI_SMBUS2_PPI instance. |
| @param SlaveAddress The SMBUS hardware address to which the SMBUS device is preassigned or |
| allocated. |
| @param Command This command is transmitted by the SMBus host controller to the SMBus slave |
| device and the interpretation is SMBus slave device specific. |
| It can mean the offset to a list of functions inside |
| an SMBus slave device. Not all operations or slave devices support |
| this command's registers. |
| @param Operation Signifies which particular SMBus hardware protocol instance that it |
| will use to execute the SMBus transactions. |
| This SMBus hardware protocol is defined by the System Management Bus (SMBus) |
| Specification and is not related to UEFI. |
| @param PecCheck Defines if Packet Error Code (PEC) checking is required for this operation. |
| @param Length Signifies the number of bytes that this operation will do. |
| The maximum number of bytes can be revision specific and operation specific. |
| This parameter will contain the actual number of bytes that are executed |
| for this operation. Not all operations require this argument. |
| @param Buffer Contains the value of data to execute to the SMBus slave device. |
| Not all operations require this argument. |
| The length of this buffer is identified by Length. |
| |
| |
| @retval EFI_SUCCESS The last data that was returned from the access |
| matched the poll exit criteria. |
| @retval EFI_CRC_ERROR The checksum is not correct (PEC is incorrect) |
| @retval EFI_TIMEOUT Timeout expired before the operation was completed. |
| Timeout is determined by the SMBus host controller device. |
| @retval EFI_OUT_OF_RESOURCES The request could not be completed |
| due to a lack of resources. |
| @retval EFI_DEVICE_ERROR The request was not completed because |
| a failure reflected in the Host Status Register bit. |
| @retval EFI_INVALID_PARAMETER Operation is not defined in EFI_SMBUS_OPERATION. |
| Or Length/Buffer is NULL for operations except for EfiSmbusQuickRead and |
| EfiSmbusQuickWrite. Or Length is outside the range of valid values. |
| @retval EFI_UNSUPPORTED The SMBus operation or PEC is not supported. |
| @retval EFI_BUFFER_TOO_SMALL Buffer is not sufficient for this operation. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_SMBUS2_PPI_EXECUTE_OPERATION)( |
| IN CONST EFI_PEI_SMBUS2_PPI *This, |
| IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress, |
| IN EFI_SMBUS_DEVICE_COMMAND Command, |
| IN EFI_SMBUS_OPERATION Operation, |
| IN BOOLEAN PecCheck, |
| IN OUT UINTN *Length, |
| IN OUT VOID *Buffer |
| ); |
| |
| /** |
| The ArpDevice() function enumerates the entire bus or enumerates a specific |
| device that is identified by SmbusUdid. |
| |
| @param This A pointer to the EFI_PEI_SMBUS2_PPI instance. |
| @param ArpAll A Boolean expression that indicates if the host drivers need |
| to enumerate all the devices or enumerate only the device that is identified |
| by SmbusUdid. If ArpAll is TRUE, SmbusUdid and SlaveAddress are optional. |
| If ArpAll is FALSE, ArpDevice will enumerate SmbusUdid and the address |
| will be at SlaveAddress. |
| @param SmbusUdid The targeted SMBus Unique Device Identifier (UDID). |
| The UDID may not exist for SMBus devices with fixed addresses. |
| @param SlaveAddress The new SMBus address for the slave device for |
| which the operation is targeted. |
| |
| @retval EFI_SUCCESS The SMBus slave device address was set. |
| @retval EFI_INVALID_PARAMETER SlaveAddress is NULL. |
| @retval EFI_OUT_OF_RESOURCES The request could not be completed |
| due to a lack of resources. |
| @retval EFI_TIMEOUT The SMBus slave device did not respond. |
| @retval EFI_DEVICE_ERROR The request was not completed because the transaction failed. |
| @retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not implemented by this PEIM. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_SMBUS2_PPI_ARP_DEVICE)( |
| IN CONST EFI_PEI_SMBUS2_PPI *This, |
| IN BOOLEAN ArpAll, |
| IN EFI_SMBUS_UDID *SmbusUdid, OPTIONAL |
| IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL |
| ); |
| |
| /** |
| The GetArpMap() function returns the mapping of all the SMBus devices |
| that are enumerated by the SMBus host driver. |
| |
| @param This A pointer to the EFI_PEI_SMBUS2_PPI instance. |
| @param Length Size of the buffer that contains the SMBus device map. |
| @param SmbusDeviceMap The pointer to the device map as enumerated |
| by the SMBus controller driver. |
| |
| @retval EFI_SUCCESS The device map was returned correctly in the buffer. |
| @retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not implemented by this PEIM. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_SMBUS2_PPI_GET_ARP_MAP)( |
| IN CONST EFI_PEI_SMBUS2_PPI *This, |
| IN OUT UINTN *Length, |
| IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap |
| ); |
| |
| /** |
| CallBack function can be registered in EFI_PEI_SMBUS2_PPI_NOTIFY. |
| |
| @param This A pointer to the EFI_PEI_SMBUS2_PPI instance. |
| @param SlaveAddress The SMBUS hardware address to which the SMBUS |
| device is preassigned or allocated. |
| @param Data Data of the SMBus host notify command that |
| the caller wants to be called. |
| |
| @retval EFI_SUCCESS NotifyFunction has been registered. |
| @retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not |
| implemented by this PEIM. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_SMBUS_NOTIFY2_FUNCTION)( |
| IN CONST EFI_PEI_SMBUS2_PPI *SmbusPpi, |
| IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress, |
| IN UINTN Data |
| ); |
| |
| /** |
| The Notify() function registers all the callback functions to allow the |
| bus driver to call these functions when the SlaveAddress/Data pair happens. |
| |
| @param This A pointer to the EFI_PEI_SMBUS2_PPI instance. |
| @param SlaveAddress Address that the host controller detects as |
| sending a message and calls all the registered functions. |
| @param Data Data that the host controller detects as sending a message |
| and calls all the registered functions. |
| @param NotifyFunction The function to call when the bus driver |
| detects the SlaveAddress and Data pair. |
| |
| @retval EFI_SUCCESS NotifyFunction has been registered. |
| @retval EFI_UNSUPPORTED ArpDevice, GetArpMap, and Notify are not |
| implemented by this PEIM. |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_SMBUS2_PPI_NOTIFY)( |
| IN CONST EFI_PEI_SMBUS2_PPI *This, |
| IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress, |
| IN UINTN Data, |
| IN EFI_PEI_SMBUS_NOTIFY2_FUNCTION NotifyFunction |
| ); |
| |
| /// |
| /// Provides the basic I/O interfaces that a PEIM uses to access |
| /// its SMBus controller and the slave devices attached to it. |
| /// |
| struct _EFI_PEI_SMBUS2_PPI { |
| EFI_PEI_SMBUS2_PPI_EXECUTE_OPERATION Execute; |
| EFI_PEI_SMBUS2_PPI_ARP_DEVICE ArpDevice; |
| EFI_PEI_SMBUS2_PPI_GET_ARP_MAP GetArpMap; |
| EFI_PEI_SMBUS2_PPI_NOTIFY Notify; |
| /// |
| /// Identifier which uniquely identifies this SMBus controller in a system. |
| /// |
| EFI_GUID Identifier; |
| }; |
| |
| extern EFI_GUID gEfiPeiSmbus2PpiGuid; |
| |
| #endif |