tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-07-29 16:44:10 +02:00
Code Issues Packages Projects Releases Wiki Activity

MdeModulePkg PciBusDxe and DuetPkg PciBusNoEnumerationDxe: Update ResetPowerManagementFeature() to clear 4 related R/W bits in the PMCSR register, leaving other bits preserved.

Browse Source 
Signed-off-by: Sun Rui <rui.sun@intel.com>
Reviewed-by: Fan Jeff <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13189 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3 2012-04-12 01:49:27 +00:00
parent afa9cd2541
commit 7e242786b7
2 changed files with 62 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
DuetPkg/PciBusNoEnumerationDxe/PciPowerManagement.c
View File

@ -1,6 +1,6 @@
/*++ /*++
Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR> Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License 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 which accompanies this distribution. The full text of the license may be found at
@ -46,7 +46,7 @@ Returns:
{ {
EFI_STATUS Status; EFI_STATUS Status;
UINT8 PowerManagementRegBlock; UINT8 PowerManagementRegBlock;
UINT16 PMCSR; UINT16 PowerManagementCSR;
PowerManagementRegBlock = 0; PowerManagementRegBlock = 0;
@ -64,18 +64,37 @@ Returns:
// //
// Turn off the PWE assertion and put the device into D0 State // Turn off the PWE assertion and put the device into D0 State
// //
PMCSR = 0x8000;
// //
// Write PMCSR // Read PMCSR
// //
PciIoDevice->PciIo.Pci.Write ( Status = PciIoDevice->PciIo.Pci.Read (
&PciIoDevice->PciIo, &PciIoDevice->PciIo,
EfiPciIoWidthUint16, EfiPciIoWidthUint16,
PowerManagementRegBlock + 4, PowerManagementRegBlock + 4,
1, 1,
&PMCSR &PowerManagementCSR
); );
if (!EFI_ERROR (Status)) {
//
// Clear PME_Status bit
//
PowerManagementCSR |= BIT15;
//
// Clear PME_En bit. PowerState = D0.
//
PowerManagementCSR &= ~(BIT8 | BIT1 | BIT0);
return EFI_SUCCESS; //
// Write PMCSR
//
Status = PciIoDevice->PciIo.Pci.Write (
&PciIoDevice->PciIo,
EfiPciIoWidthUint16,
PowerManagementRegBlock + 4,
1,
&PowerManagementCSR
);
}
return Status;
} }

42
MdeModulePkg/Bus/Pci/PciBusDxe/PciPowerManagement.c
View File

@ -1,7 +1,7 @@
/** @file /** @file
Power management support fucntions implementation for PCI Bus module. Power management support fucntions implementation for PCI Bus module.
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License 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 which accompanies this distribution. The full text of the license may be found at
@ -50,19 +50,39 @@ ResetPowerManagementFeature (
// //
// Turn off the PWE assertion and put the device into D0 State // Turn off the PWE assertion and put the device into D0 State
// //
PowerManagementCSR = 0x8000;
// //
// Write PMCSR // Read PMCSR
// //
PciIoDevice->PciIo.Pci.Write ( Status = PciIoDevice->PciIo.Pci.Read (
&PciIoDevice->PciIo, &PciIoDevice->PciIo,
EfiPciIoWidthUint16, EfiPciIoWidthUint16,
PowerManagementRegBlock + 4, PowerManagementRegBlock + 4,
1, 1,
&PowerManagementCSR &PowerManagementCSR
); );
return EFI_SUCCESS; if (!EFI_ERROR (Status)) {
//
// Clear PME_Status bit
//
PowerManagementCSR |= BIT15;
//
// Clear PME_En bit. PowerState = D0.
//
PowerManagementCSR &= ~(BIT8 | BIT1 | BIT0);
//
// Write PMCSR
//
Status = PciIoDevice->PciIo.Pci.Write (
&PciIoDevice->PciIo,
EfiPciIoWidthUint16,
PowerManagementRegBlock + 4,
1,
&PowerManagementCSR
);
}
return Status;
} }