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| author | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-17 02:02:23 +0000 |
|---|---|---|
| committer | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-17 02:02:23 +0000 |
| commit | 7ac47fd612fd109825edd74b00511348b213c074 (patch) | |
| tree | 56e31b355476e5816dba2e950ee62f93de9b2668 /MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c | |
| parent | 9b4fb0a60034c62da4bd3fdfc5220ca146915390 (diff) | |
| download | edk2-7ac47fd612fd109825edd74b00511348b213c074.tar.gz edk2-7ac47fd612fd109825edd74b00511348b213c074.tar.bz2 edk2-7ac47fd612fd109825edd74b00511348b213c074.zip | |
Rename PeiSmbusLibSmbus2 as PeiSmbusLibSmbus2Ppi.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3276 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c')
| -rw-r--r-- | MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c b/MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c new file mode 100644 index 0000000000..103e5ed5c6 --- /dev/null +++ b/MdePkg/Library/PeiSmbusLibSmbus2Ppi/PeiSmbusLib.c @@ -0,0 +1,95 @@ +/** @file
+Implementation of SmBusLib class library for PEI phase.
+
+Copyright (c) 2006, Intel Corporation<BR>
+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.
+
+**/
+
+#include "InternalSmbusLib.h"
+
+/**
+ Gets Smbus PPIs.
+
+ This internal function retrieves Smbus PPI from PPI database.
+
+ @param PeiServices An indirect pointer to the EFI_PEI_SERVICES published by the PEI Foundation.
+
+ @return The pointer to Smbus PPI.
+
+**/
+EFI_PEI_SMBUS2_PPI *
+InternalGetSmbusPpi (
+ EFI_PEI_SERVICES **PeiServices
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_SMBUS2_PPI *SmbusPpi;
+
+ Status = (*PeiServices)->LocatePpi (PeiServices, &gEfiPeiSmbus2PpiGuid, 0, NULL, (VOID **) &SmbusPpi);
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (SmbusPpi != NULL);
+
+ return SmbusPpi;
+}
+
+/**
+ Executes an SMBus operation to an SMBus controller.
+
+ This function provides a standard way to execute Smbus script
+ as defined in the SmBus Specification. The data can either be of
+ the Length byte, word, or a block of data.
+
+ @param SmbusOperation Signifies which particular SMBus hardware protocol instance that it will use to
+ execute the SMBus transactions.
+ @param SmBusAddress Address that encodes the SMBUS Slave Address,
+ SMBUS Command, SMBUS Data Length, and PEC.
+ @param Length Signifies the number of bytes that this operation will do. The maximum number of
+ bytes can be revision specific and operation specific.
+ @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.
+ @param Status Return status for the executed command.
+ This is an optional parameter and may be NULL.
+
+ @return The actual number of bytes that are executed for this operation..
+
+**/
+UINTN
+InternalSmBusExec (
+ IN EFI_SMBUS_OPERATION SmbusOperation,
+ IN UINTN SmBusAddress,
+ IN UINTN Length,
+ IN OUT VOID *Buffer,
+ OUT RETURN_STATUS *Status OPTIONAL
+ )
+{
+ EFI_PEI_SMBUS2_PPI *SmbusPpi;
+ EFI_PEI_SERVICES **PeiServices;
+ RETURN_STATUS ReturnStatus;
+ EFI_SMBUS_DEVICE_ADDRESS SmbusDeviceAddress;
+
+ PeiServices = GetPeiServicesTablePointer ();
+ SmbusPpi = InternalGetSmbusPpi (PeiServices);
+ SmbusDeviceAddress.SmbusDeviceAddress = SMBUS_LIB_SLAVE_ADDRESS (SmBusAddress);
+
+ ReturnStatus = SmbusPpi->Execute (
+ SmbusPpi,
+ SmbusDeviceAddress,
+ SMBUS_LIB_COMMAND (SmBusAddress),
+ SmbusOperation,
+ SMBUS_LIB_PEC (SmBusAddress),
+ &Length,
+ Buffer
+ );
+ if (Status != NULL) {
+ *Status = ReturnStatus;
+ }
+
+ return Length;
+}
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