386 lines
11 KiB
C
386 lines
11 KiB
C
/** @file
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EFI PCAT ISA ACPI Driver for a Generic PC Platform
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PcatIsaAcpi.h"
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//
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// PcatIsaAcpi Driver Binding Protocol
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//
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EFI_DRIVER_BINDING_PROTOCOL gPcatIsaAcpiDriverBinding = {
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PcatIsaAcpiDriverBindingSupported,
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PcatIsaAcpiDriverBindingStart,
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PcatIsaAcpiDriverBindingStop,
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0xa,
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NULL,
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NULL
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};
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/**
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the entry point of the PcatIsaAcpi driver.
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@param ImageHandle Handle for driver image
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@param SystemTable Point to EFI_SYSTEM_TABLE
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@return Success or not for installing driver binding protocol
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**/
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EFI_STATUS
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EFIAPI
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PcatIsaAcpiDriverEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return EfiLibInstallDriverBindingComponentName2 (
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ImageHandle,
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SystemTable,
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&gPcatIsaAcpiDriverBinding,
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ImageHandle,
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&gPcatIsaAcpiComponentName,
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&gPcatIsaAcpiComponentName2
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);
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}
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/**
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ControllerDriver Protocol Method
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@param This Driver Binding protocol instance pointer.
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@param Controller Handle of device to test.
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@param RemainingDevicePath Optional parameter use to pick a specific child
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device to start.
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@retval EFI_SUCCESS This driver supports this device.
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@retval other This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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PcatIsaAcpiDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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)
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{
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EFI_STATUS Status;
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EFI_PCI_IO_PROTOCOL *PciIo;
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PCI_TYPE00 Pci;
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UINTN SegmentNumber;
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UINTN BusNumber;
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UINTN DeviceNumber;
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UINTN FunctionNumber;
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//
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// Get PciIo protocol instance
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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(VOID**)&PciIo,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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Status = PciIo->Pci.Read (
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PciIo,
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EfiPciIoWidthUint32,
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0,
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sizeof(Pci) / sizeof(UINT32),
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&Pci);
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if (!EFI_ERROR (Status)) {
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Status = EFI_UNSUPPORTED;
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if ((Pci.Hdr.Command & 0x03) == 0x03) {
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if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
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//
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// See if this is a standard PCI to ISA Bridge from the Base Code and Class Code
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//
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if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
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Status = EFI_SUCCESS;
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}
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//
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// See if this is an Intel PCI to ISA bridge in Positive Decode Mode
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//
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if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE &&
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Pci.Hdr.VendorId == 0x8086 ) {
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//
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// See if this is on Function #0 to avoid false positives on
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// PCI_CLASS_BRIDGE_OTHER that has the same value as
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// PCI_CLASS_BRIDGE_ISA_PDECODE
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//
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Status = PciIo->GetLocation (
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PciIo,
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&SegmentNumber,
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&BusNumber,
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&DeviceNumber,
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&FunctionNumber
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);
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if (!EFI_ERROR (Status) && FunctionNumber == 0) {
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Status = EFI_SUCCESS;
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} else {
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Status = EFI_UNSUPPORTED;
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}
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}
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}
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}
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}
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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return Status;
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}
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/**
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Install EFI_ISA_ACPI_PROTOCOL.
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@param This Driver Binding protocol instance pointer.
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@param ControllerHandle Handle of device to bind driver to.
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@param RemainingDevicePath Optional parameter use to pick a specific child
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device to start.
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@retval EFI_SUCCESS This driver is added to ControllerHandle
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@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
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@retval other This driver does not support this device
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**/
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EFI_STATUS
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EFIAPI
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PcatIsaAcpiDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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)
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{
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EFI_STATUS Status;
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EFI_PCI_IO_PROTOCOL *PciIo;
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PCAT_ISA_ACPI_DEV *PcatIsaAcpiDev;
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UINT64 Supports;
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UINT64 OriginalAttributes;
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BOOLEAN Enabled;
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Enabled = FALSE;
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Supports = 0;
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PcatIsaAcpiDev = NULL;
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OriginalAttributes = 0;
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//
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// Open the PCI I/O Protocol Interface
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//
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PciIo = NULL;
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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(VOID**)&PciIo,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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//
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// Get supported PCI attributes
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//
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationSupported,
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0,
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&Supports
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_ISA_IO | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
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if (Supports == 0 || Supports == (EFI_PCI_IO_ATTRIBUTE_ISA_IO | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16)) {
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Status = EFI_UNSUPPORTED;
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goto Done;
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}
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationGet,
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0,
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&OriginalAttributes
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Status = PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationEnable,
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EFI_PCI_DEVICE_ENABLE | Supports | EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO,
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NULL
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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Enabled = TRUE;
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//
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// Allocate memory for the PCAT ISA ACPI Device structure
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//
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PcatIsaAcpiDev = NULL;
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Status = gBS->AllocatePool (
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EfiBootServicesData,
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sizeof(PCAT_ISA_ACPI_DEV),
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(VOID**)&PcatIsaAcpiDev
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);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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//
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// Initialize the PCAT ISA ACPI Device structure
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//
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PcatIsaAcpiDev->Signature = PCAT_ISA_ACPI_DEV_SIGNATURE;
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PcatIsaAcpiDev->Handle = Controller;
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PcatIsaAcpiDev->PciIo = PciIo;
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PcatIsaAcpiDev->OriginalAttributes = OriginalAttributes;
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//
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// Initialize PcatIsaAcpiDeviceList
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//
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InitializePcatIsaAcpiDeviceList ();
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//
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// IsaAcpi interface
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//
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(PcatIsaAcpiDev->IsaAcpi).DeviceEnumerate = IsaDeviceEnumerate;
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(PcatIsaAcpiDev->IsaAcpi).SetPower = IsaDeviceSetPower;
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(PcatIsaAcpiDev->IsaAcpi).GetCurResource = IsaGetCurrentResource;
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(PcatIsaAcpiDev->IsaAcpi).GetPosResource = IsaGetPossibleResource;
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(PcatIsaAcpiDev->IsaAcpi).SetResource = IsaSetResource;
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(PcatIsaAcpiDev->IsaAcpi).EnableDevice = IsaEnableDevice;
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(PcatIsaAcpiDev->IsaAcpi).InitDevice = IsaInitDevice;
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(PcatIsaAcpiDev->IsaAcpi).InterfaceInit = IsaInterfaceInit;
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//
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// Install the ISA ACPI Protocol interface
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//
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Status = gBS->InstallMultipleProtocolInterfaces (
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&Controller,
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&gEfiIsaAcpiProtocolGuid, &PcatIsaAcpiDev->IsaAcpi,
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NULL
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);
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Done:
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if (EFI_ERROR (Status)) {
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if (PciIo != NULL && Enabled) {
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PciIo->Attributes (
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PciIo,
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EfiPciIoAttributeOperationSet,
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OriginalAttributes,
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NULL
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);
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}
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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if (PcatIsaAcpiDev != NULL) {
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gBS->FreePool (PcatIsaAcpiDev);
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}
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return Status;
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}
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return EFI_SUCCESS;
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}
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/**
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Stop this driver on ControllerHandle. Support stopping any child handles
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created by this driver.
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@param This Protocol instance pointer.
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@param ControllerHandle Handle of device to stop driver on
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@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
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children is zero stop the entire bus driver.
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@param ChildHandleBuffer List of Child Handles to Stop.
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@retval EFI_SUCCESS This driver is removed ControllerHandle
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@retval other This driver was not removed from this device
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**/
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EFI_STATUS
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EFIAPI
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PcatIsaAcpiDriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer
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)
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{
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EFI_STATUS Status;
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EFI_ISA_ACPI_PROTOCOL *IsaAcpi;
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PCAT_ISA_ACPI_DEV *PcatIsaAcpiDev;
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//
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// Get the ISA ACPI Protocol Interface
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiIsaAcpiProtocolGuid,
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(VOID**)&IsaAcpi,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Get the PCAT ISA ACPI Device structure from the ISA ACPI Protocol
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//
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PcatIsaAcpiDev = PCAT_ISA_ACPI_DEV_FROM_THIS (IsaAcpi);
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//
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// Restore PCI attributes
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//
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Status = PcatIsaAcpiDev->PciIo->Attributes (
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PcatIsaAcpiDev->PciIo,
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EfiPciIoAttributeOperationSet,
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PcatIsaAcpiDev->OriginalAttributes,
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NULL
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Uninstall protocol interface: EFI_ISA_ACPI_PROTOCOL
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//
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Status = gBS->UninstallProtocolInterface (
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Controller,
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&gEfiIsaAcpiProtocolGuid, &PcatIsaAcpiDev->IsaAcpi
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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gBS->FreePool (PcatIsaAcpiDev);
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return EFI_SUCCESS;
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}
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