X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=IntelFrameworkModulePkg%2FBus%2FPci%2FPciBus%2FDxe%2FPciCommand.c;fp=IntelFrameworkModulePkg%2FBus%2FPci%2FPciBus%2FDxe%2FPciCommand.c;h=dd4b65061226ea06e611d38ca03ec9496692927c;hp=0000000000000000000000000000000000000000;hb=ead42efc6b7d264d5cb9b5eb81bbddc499e42a56;hpb=83f6d1a03b9037663fb1587d135020c7333235cb;ds=sidebyside diff --git a/IntelFrameworkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.c b/IntelFrameworkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.c new file mode 100644 index 0000000000..dd4b650612 --- /dev/null +++ b/IntelFrameworkModulePkg/Bus/Pci/PciBus/Dxe/PciCommand.c @@ -0,0 +1,207 @@ +/*++ + +Copyright (c) 2006 - 2007, Intel Corporation +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: + + PciCommand.c + +Abstract: + + PCI Bus Driver + +Revision History + +--*/ + +#include "pcibus.h" + +EFI_STATUS +PciOperateRegister ( + IN PCI_IO_DEVICE *PciIoDevice, + IN UINT16 Command, + IN UINT8 Offset, + IN UINT8 Operation, + OUT UINT16 *PtrCommand + ) +/*++ + +Routine Description: + +Arguments: + +Returns: + + None + +--*/ +// TODO: PciIoDevice - add argument and description to function comment +// TODO: Command - add argument and description to function comment +// TODO: Offset - add argument and description to function comment +// TODO: Operation - add argument and description to function comment +// TODO: PtrCommand - add argument and description to function comment +{ + UINT16 OldCommand; + EFI_STATUS Status; + EFI_PCI_IO_PROTOCOL *PciIo; + + OldCommand = 0; + PciIo = &PciIoDevice->PciIo; + + if (Operation != EFI_SET_REGISTER) { + Status = PciIoRead ( + PciIo, + EfiPciIoWidthUint16, + Offset, + 1, + &OldCommand + ); + + if (Operation == EFI_GET_REGISTER) { + *PtrCommand = OldCommand; + return Status; + } + } + + if (Operation == EFI_ENABLE_REGISTER) { + OldCommand = (UINT16) (OldCommand | Command); + } else if (Operation == EFI_DISABLE_REGISTER) { + OldCommand = (UINT16) (OldCommand & ~(Command)); + } else { + OldCommand = Command; + } + + return PciIoWrite ( + PciIo, + EfiPciIoWidthUint16, + Offset, + 1, + &OldCommand + ); +} + +BOOLEAN +PciCapabilitySupport ( + IN PCI_IO_DEVICE *PciIoDevice + ) +/*++ + +Routine Description: + +Arguments: + +Returns: + + None + +--*/ +// TODO: PciIoDevice - add argument and description to function comment +{ + + if (PciIoDevice->Pci.Hdr.Status & EFI_PCI_STATUS_CAPABILITY) { + return TRUE; + } + + return FALSE; +} + +EFI_STATUS +LocateCapabilityRegBlock ( + IN PCI_IO_DEVICE *PciIoDevice, + IN UINT8 CapId, + IN OUT UINT8 *Offset, + OUT UINT8 *NextRegBlock OPTIONAL + ) +/*++ + +Routine Description: + Locate cap reg. + +Arguments: + PciIoDevice - A pointer to the PCI_IO_DEVICE. + CapId - The cap ID. + Offset - A pointer to the offset. + NextRegBlock - A pointer to the next block. + +Returns: + + None + +--*/ +// TODO: EFI_UNSUPPORTED - add return value to function comment +// TODO: EFI_SUCCESS - add return value to function comment +// TODO: EFI_NOT_FOUND - add return value to function comment +{ + UINT8 CapabilityPtr; + UINT16 CapabilityEntry; + UINT8 CapabilityID; + + // + // To check the cpability of this device supports + // + if (!PciCapabilitySupport (PciIoDevice)) { + return EFI_UNSUPPORTED; + } + + if (*Offset != 0) { + CapabilityPtr = *Offset; + } else { + + CapabilityPtr = 0; + if (IS_CARDBUS_BRIDGE (&PciIoDevice->Pci)) { + + PciIoRead ( + &PciIoDevice->PciIo, + EfiPciIoWidthUint8, + EFI_PCI_CARDBUS_BRIDGE_CAPABILITY_PTR, + 1, + &CapabilityPtr + ); + } else { + + PciIoRead ( + &PciIoDevice->PciIo, + EfiPciIoWidthUint8, + EFI_PCI_CAPABILITY_PTR, + 1, + &CapabilityPtr + ); + } + } + + while (CapabilityPtr > 0x3F) { + // + // Mask it to DWORD alignment per PCI spec + // + CapabilityPtr &= 0xFC; + PciIoRead ( + &PciIoDevice->PciIo, + EfiPciIoWidthUint16, + CapabilityPtr, + 1, + &CapabilityEntry + ); + + CapabilityID = (UINT8) CapabilityEntry; + + if (CapabilityID == CapId) { + *Offset = CapabilityPtr; + if (NextRegBlock != NULL) { + *NextRegBlock = (UINT8) (CapabilityEntry >> 8); + } + + return EFI_SUCCESS; + } + + CapabilityPtr = (UINT8) (CapabilityEntry >> 8); + } + + return EFI_NOT_FOUND; +}