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Enhance IdeBusDxe to check the class code for IDE mode only. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11147 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lzeng14 2010-12-10 02:45:29 +00:00
parent 5091b4759f
commit e519401bd5
1 changed files with 41 additions and 4 deletions
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45
IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/IdeBus.c
View File

@ -148,6 +148,8 @@ IDEBusDriverBindingSupported (
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_DEV_PATH *Node;
EFI_IDE_CONTROLLER_INIT_PROTOCOL *IdeInit;
EFI_PCI_IO_PROTOCOL *PciIo;
PCI_TYPE00 PciData;
if (RemainingDevicePath != NULL) {
Node = (EFI_DEV_PATH *) RemainingDevicePath;
@ -171,10 +173,6 @@ IDEBusDriverBindingSupported (
//
// Verify the Ide Controller Init Protocol, which installed by the
// IdeController module.
// Note 1: PciIo protocol has been opened BY_DRIVER by ide_init, so We can't
// open BY_DRIVER here) That's why we don't check pciio protocol
// Note 2: ide_init driver check ide controller's pci config space, so we dont
// check here any more to save code size
//
Status = gBS->OpenProtocol (
Controller,
@ -228,6 +226,45 @@ IDEBusDriverBindingSupported (
Controller
);
//
// Get the EfiPciIoProtocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Now further check the PCI header: Base class (offset 0x0B) and
// Sub Class (offset 0x0A). This controller should be an IDE controller
//
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
0,
sizeof (PciData),
&PciData
);
if (!EFI_ERROR (Status)) {
//
// Examine if it is IDE mode by class code
//
if ((PciData.Hdr.ClassCode[2] != PCI_CLASS_MASS_STORAGE) || (PciData.Hdr.ClassCode[1] != PCI_SUB_CLASS_IDE)) {
Status = EFI_UNSUPPORTED;
} else {
Status = EFI_SUCCESS;
}
}
return Status;
}