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| author | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-29 05:29:46 +0000 |
|---|---|---|
| committer | yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-29 05:29:46 +0000 |
| commit | dd51a993419cb90cc954aa4d9ae53fb012991d21 (patch) | |
| tree | 452b405d762d52fb5aa499a7e29d60e409f2aa1b /MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c | |
| parent | 273393ca7d413b563419fc3216061ce4ed2e003a (diff) | |
| download | edk2-platforms-dd51a993419cb90cc954aa4d9ae53fb012991d21.tar.xz | |
Import BaseMemoryLibMmx;
Import PeiMemoryLib;
Import BasePeCoffLib;
Import PeiSmbusLibSmbus2;
Import DxeMemoryLib;
Import HiiLib;
Update UefiLib to support multiple language codes;
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2886 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c')
| -rw-r--r-- | MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c b/MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c new file mode 100644 index 0000000000..18a7973f21 --- /dev/null +++ b/MdePkg/Library/DxeSmbusLib/DxeSmbusLib.c @@ -0,0 +1,104 @@ +/** @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.
+
+
+Module Name: DxeSmbusLib.c
+
+**/
+
+#include "InternalSmbusLib.h"
+
+#include <Protocol/SmbusHc.h>
+
+//
+// Globle varible to cache pointer to Smbus protocol.
+//
+STATIC EFI_SMBUS_HC_PROTOCOL *mSmbus = NULL;
+
+/**
+ The constructor function caches the pointer to Smbus protocol.
+
+ The constructor function locates Smbus protocol from protocol database.
+ It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+SmbusLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = gBS->LocateProtocol (&gEfiSmbusHcProtocolGuid, NULL, (VOID**) &mSmbus);
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (mSmbus != NULL);
+
+ return Status;
+}
+
+/**
+ 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
+ )
+{
+ RETURN_STATUS ReturnStatus;
+ EFI_SMBUS_DEVICE_ADDRESS SmbusDeviceAddress;
+
+ SmbusDeviceAddress.SmbusDeviceAddress = SMBUS_LIB_SLAVE_ADDRESS (SmBusAddress);
+
+ ReturnStatus = mSmbus->Execute (
+ mSmbus,
+ SmbusDeviceAddress,
+ SMBUS_LIB_COMMAND (SmBusAddress),
+ SmbusOperation,
+ SMBUS_LIB_PEC (SmBusAddress),
+ &Length,
+ Buffer
+ );
+ if (Status != NULL) {
+ *Status = ReturnStatus;
+ }
+
+ return Length;
+}
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