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/** @file
Implements Platform Trust Technology (FTPM) HECI SkuMgr Interface Library.
@copyright
Copyright (c) 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#if !defined(EDK_RELEASE_VERSION) || (EDK_RELEASE_VERSION < 0x00020000)
#include "EdkIIGlueBase.h"
#endif
#ifdef PTT_FLAG
#include "PttHeciLib.h"
#include "HeciMsgLib.h"
#define PTT_BITMASK 0x20000000 //BIT29
#define CLEAR_PTT_BIT 0x00000000
/**
Checks whether ME FW has the Platform Trust Technology capability.
@param[out] PttCapability TRUE if PTT is supported, FALSE othewrwise.
@retval EFI_SUCCESS Command succeeded
@retval EFI_DEVICE_ERROR HECI Device error, command aborts abnormally
**/
EFI_STATUS
EFIAPI
PttHeciGetCapability(
OUT BOOLEAN *PttCapability
)
{
EFI_STATUS Status;
GEN_GET_FW_CAPSKU MsgGenGetFwCapsSku;
GEN_GET_FW_CAPS_SKU_ACK MsgGenGetFwCapsSkuAck;
*PttCapability = FALSE;
Status = HeciGetFwCapsSkuMsg (&MsgGenGetFwCapsSku, &MsgGenGetFwCapsSkuAck);
if (EFI_ERROR (Status)) {
return Status;
}
if (((MsgGenGetFwCapsSkuAck.MKHIHeader.Fields.Command) == FWCAPS_GET_RULE_CMD) &&
((MsgGenGetFwCapsSkuAck.MKHIHeader.Fields.IsResponse) == 1) &&
(MsgGenGetFwCapsSkuAck.MKHIHeader.Fields.Result == 0)
) {
if (MsgGenGetFwCapsSkuAck.Data.FWCapSku.Fields.PTT) {
*PttCapability = TRUE;
}
}
DEBUG ((EFI_D_INFO, "PTT SkuMgr: PttCapability = %d\n", *PttCapability));
return EFI_SUCCESS;
}
/**
Checks Platform Trust Technology enablement state.
@param[out] IsPttEnabledState TRUE if PTT is enabled, FALSE othewrwise.
@retval EFI_SUCCESS Command succeeded
@retval EFI_DEVICE_ERROR HECI Device error, command aborts abnormally
**/
EFI_STATUS
EFIAPI
PttHeciGetState(
OUT BOOLEAN *IsPttEnabledState
)
{
EFI_STATUS Status;
MEFWCAPS_SKU CurrentFeatures;
*IsPttEnabledState = FALSE;
Status = HeciGetFwFeatureStateMsg (&CurrentFeatures);
if (EFI_ERROR (Status)) {
return Status;
}
if (CurrentFeatures.Fields.PTT) {
*IsPttEnabledState = TRUE;
}
DEBUG ((EFI_D_INFO, "PTT SkuMgr: PttState = %d\n", *IsPttEnabledState));
return EFI_SUCCESS;
}
/**
Changes current Platform Trust Technology state.
@param[in] PttEnabledState TRUE to enable, FALSE to disable.
@retval EFI_SUCCESS Command succeeded
@retval EFI_DEVICE_ERROR HECI Device error, command aborts abnormally
**/
EFI_STATUS
EFIAPI
PttHeciSetState(
IN BOOLEAN PttEnabledState
)
{
EFI_STATUS Status;
UINT32 EnableBitmap;
UINT32 DisableBitmap;
if (PttEnabledState) {
//
// Enable PTT
//
DEBUG ((EFI_D_INFO, "PTT SkuMgr: Enable PTT\n"));
EnableBitmap = PTT_BITMASK;
DisableBitmap = CLEAR_PTT_BIT;
} else {
//
// Disable PTT
//
DEBUG ((EFI_D_INFO, "PTT SkuMgr: Disable PTT\n"));
EnableBitmap = CLEAR_PTT_BIT;
DisableBitmap = PTT_BITMASK;
}
Status = HeciFwFeatureStateOverride (EnableBitmap, DisableBitmap);
return Status;
}
#endif // PTT_FLAG
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