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674 lines
22 KiB
C
674 lines
22 KiB
C
/** @file
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ISA Bus UEFI driver.
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Discovers all the ISA Controllers and their resources by using the ISA ACPI
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Protocol, produces an instance of the ISA I/O Protocol for every ISA
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Controller found. This driver is designed to manage a PCI-to-ISA bridge Device
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such as LPC bridge.
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Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "InternalIsaBus.h"
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//
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// ISA Bus Driver Global Variables
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//
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EFI_DRIVER_BINDING_PROTOCOL gIsaBusControllerDriver = {
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IsaBusControllerDriverSupported,
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IsaBusControllerDriverStart,
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IsaBusControllerDriverStop,
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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 main entry point for the ISA Bus driver.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval EFI_OUT_OF_RESOURCES There was not enough memory in pool to install all the protocols.
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**/
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EFI_STATUS
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EFIAPI
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InitializeIsaBus(
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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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EFI_STATUS Status;
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//
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// Install driver model protocol(s).
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//
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Status = EfiLibInstallDriverBindingComponentName2 (
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ImageHandle,
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SystemTable,
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&gIsaBusControllerDriver,
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ImageHandle,
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&gIsaBusComponentName,
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&gIsaBusComponentName2
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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/**
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Tests to see if a controller can be managed by the ISA Bus Driver. If a child device is provided,
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it further tests to see if this driver supports creating a handle for the specified child device.
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Note that the ISA Bus driver always creates all of its child handles on the first call to Start().
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How the Start() function of a driver is implemented can affect how the Supported() function is implemented.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] Controller The handle of the controller to test.
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@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
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@retval EFI_SUCCESS The device is supported by this driver.
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@retval EFI_ALREADY_STARTED The device is already being managed by this driver.
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@retval EFI_ACCESS_DENIED The device is already being managed by a different driver
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or an application that requires exclusive access.
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@retval EFI_UNSUPPORTED The device is is not supported by this driver.
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**/
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EFI_STATUS
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EFIAPI
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IsaBusControllerDriverSupported (
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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 OPTIONAL
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)
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{
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EFI_STATUS Status;
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EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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EFI_ISA_ACPI_PROTOCOL *IsaAcpi;
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//
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// If RemainingDevicePath is not NULL, it should verify that the first device
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// path node in RemainingDevicePath is an ACPI Device path node which is a
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// legal Device Path Node for this bus driver's children.
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//
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if (RemainingDevicePath != NULL) {
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if (RemainingDevicePath->Type != ACPI_DEVICE_PATH) {
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return EFI_UNSUPPORTED;
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} else if (RemainingDevicePath->SubType == ACPI_DP) {
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if (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_HID_DEVICE_PATH)) {
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return EFI_UNSUPPORTED;
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}
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} else if (RemainingDevicePath->SubType == ACPI_EXTENDED_DP) {
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if (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_EXTENDED_HID_DEVICE_PATH)) {
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return EFI_UNSUPPORTED;
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}
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} else {
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return EFI_UNSUPPORTED;
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}
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}
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//
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// Try to open EFI DEVICE PATH protocol on the controller
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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(VOID **) &ParentDevicePath,
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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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//
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// Although this driver creates all child handles at one time,
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// but because all child handles may be not stopped at one time in EFI Driver Binding.Stop(),
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// So it is allowed to create child handles again in successive calls to EFI Driver Binding.Start().
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//
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if (Status == EFI_ALREADY_STARTED) {
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return EFI_SUCCESS;
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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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&gEfiDevicePathProtocolGuid,
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This->DriverBindingHandle,
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Controller
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);
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//
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// Try to get Pci IO Protocol because it is assumed
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// to have been opened by ISA ACPI driver
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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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NULL,
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This->DriverBindingHandle,
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Controller,
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EFI_OPEN_PROTOCOL_TEST_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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// Try to open the Isa Acpi protocol on the controller
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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_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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//
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// Add more check to see if the child device is valid by calling IsaAcpi->DeviceEnumerate?
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//
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gBS->CloseProtocol (
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Controller,
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&gEfiIsaAcpiProtocolGuid,
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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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Start this driver on ControllerHandle.
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Note that the ISA Bus driver always creates all of its child handles on the first call to Start().
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The Start() function is designed to be invoked from the EFI boot service ConnectController().
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As a result, much of the error checking on the parameters to Start() has been moved into this
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common boot service. It is legal to call Start() from other locations, but the following calling
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restrictions must be followed or the system behavior will not be deterministic.
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1. ControllerHandle must be a valid EFI_HANDLE.
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2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
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EFI_DEVICE_PATH_PROTOCOL.
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3. Prior to calling Start(), the Supported() function for the driver specified by This must
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have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] ControllerHandle The handle of the controller to start. This handle
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must support a protocol interface that supplies
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an I/O abstraction to the driver.
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@param[in] RemainingDevicePath A pointer to the remaining portion of a device path.
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This parameter is ignored by device drivers, and is optional for bus drivers.
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@retval EFI_SUCCESS The device was started.
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@retval EFI_DEVICE_ERROR The device could not be started due to a device error.
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Currently not implemented.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval Others The driver failded to start the device.
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**/
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EFI_STATUS
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EFIAPI
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IsaBusControllerDriverStart (
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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 OPTIONAL
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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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EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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EFI_ISA_ACPI_PROTOCOL *IsaAcpi;
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EFI_ISA_ACPI_DEVICE_ID *IsaDevice;
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EFI_ISA_ACPI_RESOURCE_LIST *ResourceList;
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EFI_GENERIC_MEMORY_TEST_PROTOCOL *GenMemoryTest;
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//
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// Local variables declaration for StatusCode reporting
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//
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EFI_DEVICE_PATH_PROTOCOL *DevicePathData;
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DevicePathData = NULL;
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//
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// Get Pci IO Protocol
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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_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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// Open Device Path Protocol
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//
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Status = gBS->OpenProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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(VOID **) &ParentDevicePath,
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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) && Status != EFI_ALREADY_STARTED) {
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return Status;
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}
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//
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// Open ISA Acpi Protocol
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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_BY_DRIVER
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);
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if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
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//
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// Close opened protocol
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//
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gBS->CloseProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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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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// The IsaBus driver will use memory below 16M, which is not tested yet,
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// so call CompatibleRangeTest to test them. Since memory below 1M should
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// be reserved to CSM, and 15M~16M might be reserved for Isa hole, test 1M
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// ~15M here
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//
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Status = gBS->LocateProtocol (
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&gEfiGenericMemTestProtocolGuid,
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NULL,
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(VOID **) &GenMemoryTest
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);
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if (!EFI_ERROR (Status)) {
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Status = GenMemoryTest->CompatibleRangeTest (
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GenMemoryTest,
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0x100000,
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0xE00000
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);
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}
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//
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// Report Status Code here since we will initialize the host controller
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//
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_PROGRESS_CODE,
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(EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),
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ParentDevicePath
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);
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//
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// first init ISA interface
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//
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IsaAcpi->InterfaceInit (IsaAcpi);
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//
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// Report Status Code here since we will enable the host controller
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//
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_PROGRESS_CODE,
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(EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),
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ParentDevicePath
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);
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//
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// Create each ISA device handle in this ISA bus
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//
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IsaDevice = NULL;
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do {
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Status = IsaAcpi->DeviceEnumerate (IsaAcpi, &IsaDevice);
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if (EFI_ERROR (Status)) {
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break;
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}
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//
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// Get current resource of this ISA device
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//
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ResourceList = NULL;
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Status = IsaAcpi->GetCurResource (IsaAcpi, IsaDevice, &ResourceList);
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if (EFI_ERROR (Status)) {
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continue;
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}
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//
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// Create handle for this ISA device
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//
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// If any child device handle was created in previous call to Start() and not stopped
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// in previous call to Stop(), it will not be created again because the
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// InstallMultipleProtocolInterfaces() boot service will reject same device path.
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//
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Status = IsaCreateDevice (
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This,
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Controller,
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PciIo,
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ParentDevicePath,
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ResourceList,
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&DevicePathData
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);
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if (EFI_ERROR (Status)) {
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continue;
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}
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//
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// Initialize ISA device
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//
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IsaAcpi->InitDevice (IsaAcpi, IsaDevice);
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//
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// Set resources for this ISA device
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//
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Status = IsaAcpi->SetResource (IsaAcpi, IsaDevice, ResourceList);
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//
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// Report Status Code here when failed to resource conflicts
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//
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if (EFI_ERROR (Status) && (Status != EFI_UNSUPPORTED)) {
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//
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// It's hard to tell which resource conflicts
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//
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_ERROR_CODE,
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(EFI_IO_BUS_LPC | EFI_IOB_EC_RESOURCE_CONFLICT),
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DevicePathData
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);
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}
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//
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// Set power for this ISA device
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//
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IsaAcpi->SetPower (IsaAcpi, IsaDevice, TRUE);
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//
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// Enable this ISA device
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//
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IsaAcpi->EnableDevice (IsaAcpi, IsaDevice, TRUE);
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} while (TRUE);
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return EFI_SUCCESS;
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}
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/**
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Stop this driver on ControllerHandle.
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The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
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As a result, much of the error checking on the parameters to Stop() has been moved
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into this common boot service. It is legal to call Stop() from other locations,
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but the following calling restrictions must be followed or the system behavior will not be deterministic.
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1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
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same driver's Start() function.
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2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
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EFI_HANDLE. In addition, all of these handles must have been created in this driver's
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Start() function, and the Start() function must have called OpenProtocol() on
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ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
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@param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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@param[in] ControllerHandle A handle to the device being stopped. The handle must
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support a bus specific I/O protocol for the driver
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to use to stop the device.
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@param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
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@param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
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if NumberOfChildren is 0.
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@retval EFI_SUCCESS The device was stopped.
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@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
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**/
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EFI_STATUS
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EFIAPI
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IsaBusControllerDriverStop (
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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 OPTIONAL
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)
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{
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EFI_STATUS Status;
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UINTN Index;
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BOOLEAN AllChildrenStopped;
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ISA_IO_DEVICE *IsaIoDevice;
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EFI_ISA_IO_PROTOCOL *IsaIo;
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EFI_PCI_IO_PROTOCOL *PciIo;
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if (NumberOfChildren == 0) {
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//
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// Close the bus driver
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//
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Status = gBS->CloseProtocol (
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Controller,
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&gEfiDevicePathProtocolGuid,
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This->DriverBindingHandle,
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Controller
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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 = gBS->CloseProtocol (
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Controller,
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&gEfiIsaAcpiProtocolGuid,
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This->DriverBindingHandle,
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Controller
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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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return EFI_SUCCESS;
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}
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//
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// Complete all outstanding transactions to Controller.
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// Don't allow any new transaction to Controller to be started.
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//
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//
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// Stop all the children
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// Find all the ISA devices that were discovered on this PCI to ISA Bridge
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// with the Start() function.
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//
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AllChildrenStopped = TRUE;
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for (Index = 0; Index < NumberOfChildren; Index++) {
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Status = gBS->OpenProtocol (
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ChildHandleBuffer[Index],
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&gEfiIsaIoProtocolGuid,
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(VOID **) &IsaIo,
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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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IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (IsaIo);
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//
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// Close the child handle
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//
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Status = gBS->CloseProtocol (
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Controller,
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&gEfiPciIoProtocolGuid,
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This->DriverBindingHandle,
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ChildHandleBuffer[Index]
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);
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ChildHandleBuffer[Index],
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&gEfiDevicePathProtocolGuid,
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IsaIoDevice->DevicePath,
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&gEfiIsaIoProtocolGuid,
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&IsaIoDevice->IsaIo,
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NULL
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);
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|
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if (!EFI_ERROR (Status)) {
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FreePool (IsaIoDevice->DevicePath);
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FreePool (IsaIoDevice);
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} else {
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//
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// Re-open PCI IO Protocol on behalf of the child device
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// because of failure of destroying the child device handle
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//
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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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ChildHandleBuffer[Index],
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EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
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);
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}
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}
|
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|
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if (EFI_ERROR (Status)) {
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AllChildrenStopped = FALSE;
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}
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}
|
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|
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if (!AllChildrenStopped) {
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return EFI_DEVICE_ERROR;
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}
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|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// Internal Function
|
|
//
|
|
|
|
/**
|
|
Create EFI Handle for a ISA device found via ISA ACPI Protocol
|
|
|
|
@param[in] This The EFI_DRIVER_BINDING_PROTOCOL instance.
|
|
@param[in] Controller The handle of ISA bus controller(PCI to ISA bridge)
|
|
@param[in] PciIo The Pointer to the PCI protocol
|
|
@param[in] ParentDevicePath Device path of the ISA bus controller
|
|
@param[in] IsaDeviceResourceList The resource list of the ISA device
|
|
@param[out] ChildDevicePath The pointer to the child device.
|
|
|
|
@retval EFI_SUCCESS The handle for the child device was created.
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
|
|
@retval EFI_DEVICE_ERROR The handle for the child device can not be created.
|
|
**/
|
|
EFI_STATUS
|
|
IsaCreateDevice (
|
|
IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
|
IN EFI_HANDLE Controller,
|
|
IN EFI_PCI_IO_PROTOCOL *PciIo,
|
|
IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,
|
|
IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList,
|
|
OUT EFI_DEVICE_PATH_PROTOCOL **ChildDevicePath
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
EFI_DEV_PATH Node;
|
|
|
|
//
|
|
// Initialize the PCI_IO_DEVICE structure
|
|
//
|
|
IsaIoDevice = AllocateZeroPool (sizeof (ISA_IO_DEVICE));
|
|
if (IsaIoDevice == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
IsaIoDevice->Signature = ISA_IO_DEVICE_SIGNATURE;
|
|
IsaIoDevice->Handle = NULL;
|
|
IsaIoDevice->PciIo = PciIo;
|
|
|
|
//
|
|
// Initialize the ISA I/O instance structure
|
|
//
|
|
InitializeIsaIoInstance (IsaIoDevice, IsaDeviceResourceList);
|
|
|
|
//
|
|
// Build the child device path
|
|
//
|
|
Node.DevPath.Type = ACPI_DEVICE_PATH;
|
|
Node.DevPath.SubType = ACPI_DP;
|
|
SetDevicePathNodeLength (&Node.DevPath, sizeof (ACPI_HID_DEVICE_PATH));
|
|
Node.Acpi.HID = IsaDeviceResourceList->Device.HID;
|
|
Node.Acpi.UID = IsaDeviceResourceList->Device.UID;
|
|
|
|
IsaIoDevice->DevicePath = AppendDevicePathNode (
|
|
ParentDevicePath,
|
|
&Node.DevPath
|
|
);
|
|
|
|
if (IsaIoDevice->DevicePath == NULL) {
|
|
Status = EFI_OUT_OF_RESOURCES;
|
|
goto Done;
|
|
}
|
|
|
|
*ChildDevicePath = IsaIoDevice->DevicePath;
|
|
|
|
//
|
|
// Create a child handle and install Device Path and ISA I/O protocols
|
|
//
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
&IsaIoDevice->Handle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
IsaIoDevice->DevicePath,
|
|
&gEfiIsaIoProtocolGuid,
|
|
&IsaIoDevice->IsaIo,
|
|
NULL
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
goto Done;
|
|
}
|
|
|
|
Status = gBS->OpenProtocol (
|
|
Controller,
|
|
&gEfiPciIoProtocolGuid,
|
|
(VOID **) &PciIo,
|
|
This->DriverBindingHandle,
|
|
IsaIoDevice->Handle,
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->UninstallMultipleProtocolInterfaces (
|
|
IsaIoDevice->Handle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
IsaIoDevice->DevicePath,
|
|
&gEfiIsaIoProtocolGuid,
|
|
&IsaIoDevice->IsaIo,
|
|
NULL
|
|
);
|
|
}
|
|
|
|
Done:
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
if (IsaIoDevice->DevicePath != NULL) {
|
|
FreePool (IsaIoDevice->DevicePath);
|
|
}
|
|
|
|
FreePool (IsaIoDevice);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|