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- /** @file
- Produces the SIO Protocols for ISA devices integrated in the Platform
- Controller Unit (PCU).
- Copyright (c) 2004 - 2019, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "PcuSio.h"
- //
- // PCU SIO Driver Global Variables
- //
- EFI_DRIVER_BINDING_PROTOCOL gPcuSioDriverBinding = {
- PcuSioDriverBindingSupported,
- PcuSioDriverBindingStart,
- PcuSioDriverBindingStop,
- 0x10,
- NULL,
- NULL
- };
- //
- // Super I/O Protocol interfaces
- //
- EFI_SIO_PROTOCOL mSioInterface = {
- SioRegisterAccess,
- SioGetResources,
- SioSetResources,
- SioPossibleResources,
- SioModify
- };
- //
- // COM 1 UART Controller
- //
- GLOBAL_REMOVE_IF_UNREFERENCED
- SIO_RESOURCES_IO mCom1Resources = {
- { { ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR }, 0x3F8, 8 },
- { ACPI_END_TAG_DESCRIPTOR, 0 }
- };
- //
- // Table of SIO Controllers
- //
- GLOBAL_REMOVE_IF_UNREFERENCED
- SIO_DEVICE_INFO mDevicesInfo[] = {
- {
- EISA_PNP_ID (0x501),
- 0,
- { (ACPI_SMALL_RESOURCE_HEADER *) &mCom1Resources }
- }
- };
- //
- // ACPI Device Path Node template
- //
- GLOBAL_REMOVE_IF_UNREFERENCED
- ACPI_HID_DEVICE_PATH mAcpiDeviceNodeTemplate = {
- { // Header
- ACPI_DEVICE_PATH,
- ACPI_DP,
- {
- (UINT8) (sizeof (ACPI_HID_DEVICE_PATH)),
- (UINT8) ((sizeof (ACPI_HID_DEVICE_PATH)) >> 8)
- }
- },
- 0x0, // HID
- 0x0 // UID
- };
- /**
- Provides a low level access to the registers for the Super I/O.
- @param[in] This Indicates a pointer to the calling context.
- @param[in] Write Specifies the type of the register operation.
- If this parameter is TRUE, Value is interpreted
- as an input parameter and the operation is a
- register write. If this parameter is FALSE,
- Value is interpreted as an output parameter and
- the operation is a register read.
- @param[in] ExitCfgMode Exit Configuration Mode Indicator. If this
- parameter is set to TRUE, the Super I/O driver
- will turn off configuration mode of the Super
- I/O prior to returning from this function. If
- this parameter is set to FALSE, the Super I/O
- driver will leave Super I/O in the
- configuration mode. The Super I/O driver must
- track the current state of the Super I/O and
- enable the configuration mode of Super I/O if
- necessary prior to register access.
- @param[in] Register Register number.
- @param[in,out] Value If Write is TRUE, Value is a pointer to the
- buffer containing the byte of data to be
- written to the Super I/O register. If Write is
- FALSE, Value is a pointer to the destination
- buffer for the byte of data to be read from the
- Super I/O register.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_INVALID_PARAMETER The Value is NULL.
- @retval EFI_INVALID_PARAMETER Invalid Register number.
- **/
- EFI_STATUS
- EFIAPI
- SioRegisterAccess (
- IN CONST EFI_SIO_PROTOCOL *This,
- IN BOOLEAN Write,
- IN BOOLEAN ExitCfgMode,
- IN UINT8 Register,
- IN OUT UINT8 *Value
- )
- {
- return EFI_SUCCESS;
- }
- /**
- Provides an interface to get a list of the current resources consumed by the
- device in the ACPI Resource Descriptor format.
- GetResources() returns a list of resources currently consumed by the device.
- The ResourceList is a pointer to the buffer containing resource descriptors
- for the device. The descriptors are in the format of Small or Large ACPI
- resource descriptor as defined by ACPI specification (2.0 & 3.0). The buffer
- of resource descriptors is terminated with the 'End tag' resource descriptor.
- @param[in] This Indicates a pointer to the calling context.
- @param[out] ResourceList A pointer to an ACPI resource descriptor list
- that defines the current resources used by the
- device.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_INVALID_PARAMETER ResourceList is NULL.
- **/
- EFI_STATUS
- EFIAPI
- SioGetResources (
- IN CONST EFI_SIO_PROTOCOL *This,
- OUT ACPI_RESOURCE_HEADER_PTR *ResourceList
- )
- {
- SIO_DEV *SioDevice;
- if (ResourceList == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- SioDevice = SIO_DEV_FROM_SIO (This);
- if (SioDevice->DeviceIndex < ARRAY_SIZE (mDevicesInfo)) {
- *ResourceList = mDevicesInfo[SioDevice->DeviceIndex].Resources;
- }
- return EFI_SUCCESS;
- }
- /**
- Sets the resources for the device.
- @param[in] This Indicates a pointer to the calling context.
- @param[in] ResourceList Pointer to the ACPI resource descriptor list.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_INVALID_PARAMETER ResourceList is invalid.
- @retval EFI_ACCESS_DENIED Some of the resources in ResourceList are in
- use.
- **/
- EFI_STATUS
- EFIAPI
- SioSetResources (
- IN CONST EFI_SIO_PROTOCOL *This,
- IN ACPI_RESOURCE_HEADER_PTR ResourceList
- )
- {
- return EFI_SUCCESS;
- }
- /**
- Provides a collection of resource descriptor lists. Each resource descriptor
- list in the collection defines a combination of resources that can
- potentially be used by the device.
- @param[in] This Indicates a pointer to the calling context.
- @param[out] ResourceCollection Collection of the resource descriptor
- lists.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_INVALID_PARAMETER ResourceCollection is NULL.
- **/
- EFI_STATUS
- EFIAPI
- SioPossibleResources (
- IN CONST EFI_SIO_PROTOCOL *This,
- OUT ACPI_RESOURCE_HEADER_PTR *ResourceCollection
- )
- {
- return EFI_SUCCESS;
- }
- /**
- Provides an interface for a table based programming of the Super I/O
- registers.
- The Modify() function provides an interface for table based programming of
- the Super I/O registers. This function can be used to perform programming of
- multiple Super I/O registers with a single function call. For each table
- entry, the Register is read, its content is bitwise ANDed with AndMask, and
- then ORed with OrMask before being written back to the Register. The Super
- I/O driver must track the current state of the Super I/O and enable the
- configuration mode of Super I/O if necessary prior to table processing. Once
- the table is processed, the Super I/O device has to be returned to the
- original state.
- @param[in] This Indicates a pointer to the calling context.
- @param[in] Command A pointer to an array of NumberOfCommands
- EFI_SIO_REGISTER_MODIFY structures. Each
- structure specifies a single Super I/O register
- modify operation.
- @param[in] NumberOfCommands Number of elements in the Command array.
- @retval EFI_SUCCESS The operation completed successfully.
- @retval EFI_INVALID_PARAMETER Command is NULL.
- **/
- EFI_STATUS
- EFIAPI
- SioModify (
- IN CONST EFI_SIO_PROTOCOL *This,
- IN CONST EFI_SIO_REGISTER_MODIFY *Command,
- IN UINTN NumberOfCommands
- )
- {
- return EFI_SUCCESS;
- }
- /**
- Create the child device with a given device index.
- @param[in] This The EFI_DRIVER_BINDING_PROTOCOL instance.
- @param[in] Controller The handle of ISA bus controller.
- @param[in] PciIo The pointer to the PCI protocol.
- @param[in] ParentDevicePath Device path of the ISA bus controller.
- @param[in] DeviceIndex Index of the device supported by this driver.
- @retval EFI_SUCCESS The child device has been created successfully.
- @retval Others Error occurred during the child device creation.
- **/
- EFI_STATUS
- SioCreateChildDevice (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Controller,
- IN EFI_PCI_IO_PROTOCOL *PciIo,
- IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,
- IN UINT32 DeviceIndex
- )
- {
- EFI_STATUS Status;
- SIO_DEV *SioDevice;
- //
- // Initialize the SIO_DEV structure
- //
- SioDevice = AllocateZeroPool (sizeof (SIO_DEV));
- if (SioDevice == NULL) {
- DEBUG ((DEBUG_ERROR, "SioCreateChildDevice(): Can not allocate SIO Device structure\n"));
- return EFI_OUT_OF_RESOURCES;
- }
- SioDevice->Signature = SIO_DEV_SIGNATURE;
- SioDevice->Handle = NULL;
- SioDevice->PciIo = PciIo;
- CopyMem (&SioDevice->Sio, &mSioInterface, sizeof (EFI_SIO_PROTOCOL));
- SioDevice->DeviceIndex = DeviceIndex;
- //
- // Construct the child device path
- //
- mAcpiDeviceNodeTemplate.HID = mDevicesInfo[DeviceIndex].Hid;
- mAcpiDeviceNodeTemplate.UID = mDevicesInfo[DeviceIndex].Uid;
- SioDevice->DevicePath = AppendDevicePathNode (
- ParentDevicePath,
- (EFI_DEVICE_PATH_PROTOCOL *) &mAcpiDeviceNodeTemplate
- );
- if (SioDevice->DevicePath == NULL) {
- DEBUG ((DEBUG_ERROR, "SioCreateChildDevice(): Can not allocate SIO Device path\n"));
- Status = EFI_OUT_OF_RESOURCES;
- goto Done;
- }
- //
- // Create a child handle and install Device Path and Super I/O protocols
- //
- Status = gBS->InstallMultipleProtocolInterfaces (
- &SioDevice->Handle,
- &gEfiDevicePathProtocolGuid,
- SioDevice->DevicePath,
- &gEfiSioProtocolGuid,
- &SioDevice->Sio,
- NULL
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "SioCreateChildDevice(): Can not install child protocols %r\n", Status));
- goto Done;
- }
- Status = gBS->OpenProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- (VOID **) &PciIo,
- This->DriverBindingHandle,
- SioDevice->Handle,
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "SioCreateChildDevice(): Can not open parent PCI I/O Protocol by child controller %r\n", Status));
- gBS->UninstallMultipleProtocolInterfaces (
- SioDevice->Handle,
- &gEfiDevicePathProtocolGuid,
- SioDevice->DevicePath,
- &gEfiSioProtocolGuid,
- &SioDevice->Sio,
- NULL
- );
- }
- Done:
- if (EFI_ERROR (Status)) {
- if (SioDevice->DevicePath != NULL) {
- FreePool (SioDevice->DevicePath);
- }
- FreePool (SioDevice);
- }
- return Status;
- }
- /**
- Create all the ISA child devices on the ISA bus controller (PCI to ISA
- bridge).
- @param[in] This The EFI_DRIVER_BINDING_PROTOCOL instance.
- @param[in] Controller The handle of ISA bus controller.
- @param[in] PciIo The pointer to the PCI protocol.
- @param[in] ParentDevicePath Device path of the ISA bus controller.
- @retval The number of child device that is successfully created.
- **/
- UINT32
- SioCreateAllChildDevices (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Controller,
- IN EFI_PCI_IO_PROTOCOL *PciIo,
- IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath
- )
- {
- UINT32 Index;
- UINT32 ChildDeviceNumber;
- EFI_STATUS Status;
- ChildDeviceNumber = 0;
- for (Index = 0; Index < ARRAY_SIZE (mDevicesInfo); Index++) {
- Status = SioCreateChildDevice (
- This,
- Controller,
- PciIo,
- ParentDevicePath,
- Index
- );
- if (!EFI_ERROR (Status)) {
- ChildDeviceNumber++;
- }
- }
- return ChildDeviceNumber;
- }
- /**
- Tests to see if this driver supports a given controller. If a child device is
- provided, it further tests to see if this driver supports creating a handle
- for the specified child device.
- This function checks to see if the driver specified by This supports the
- device specified by ControllerHandle. Drivers will typically use the device
- path attached to ControllerHandle and/or the services from the bus I/O
- abstraction attached to ControllerHandle to determine if the driver supports
- ControllerHandle. This function may be called many times during platform
- initialization. In order to reduce boot times, the tests performed by this
- function must be very small, and take as little time as possible to execute.
- This function must not change the state of any hardware devices, and this
- function must be aware that the device specified by ControllerHandle may
- already be managed by the same driver or a different driver. This function
- must match its calls to AllocatePages() with FreePages(), AllocatePool() with
- FreePool(), and OpenProtocol() with CloseProtocol(). Since ControllerHandle
- may have been previously started by the same driver, if a protocol is already
- in the opened state, then it must not be closed with CloseProtocol(). This is
- required to guarantee the state of ControllerHandle is not modified by this
- function.
- @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
- instance.
- @param[in] ControllerHandle The handle of the controller to test. This
- handle must support a protocol interface
- that supplies an I/O abstraction to the
- driver.
- @param[in] RemainingDevicePath A pointer to the remaining portion of a
- device path. This parameter is ignored by
- device drivers, and is optional for bus
- drivers. For bus drivers, if this parameter
- is not NULL, then the bus driver must
- determine if the bus controller specified by
- ControllerHandle and the child controller
- specified by RemainingDevicePath are both
- supported by this bus driver.
- @retval EFI_SUCCESS The device specified by ControllerHandle and
- RemainingDevicePath is supported by the
- driver specified by This.
- @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
- RemainingDevicePath is already being managed
- by the driver specified by This.
- @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
- RemainingDevicePath is already being managed
- by a different driver or an application that
- requires exclusive access.
- @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
- RemainingDevicePath is not supported by the
- driver specified by This.
- **/
- EFI_STATUS
- EFIAPI
- PcuSioDriverBindingSupported (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Controller,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
- )
- {
- EFI_STATUS Status;
- EFI_PCI_IO_PROTOCOL *PciIo;
- PCI_TYPE00 Pci;
- //
- // Get PciIo protocol instance
- //
- Status = gBS->OpenProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- (VOID **)&PciIo,
- This->DriverBindingHandle,
- Controller,
- EFI_OPEN_PROTOCOL_BY_DRIVER
- );
- if (EFI_ERROR(Status)) {
- return Status;
- }
- Status = PciIo->Pci.Read (
- PciIo,
- EfiPciIoWidthUint32,
- 0,
- sizeof(Pci) / sizeof(UINT32),
- &Pci
- );
- if (!EFI_ERROR (Status)) {
- Status = EFI_UNSUPPORTED;
- if ((Pci.Hdr.Command & 0x03) == 0x03) {
- if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
- //
- // See if this is a standard PCI to ISA Bridge from the Base Code
- // and Class Code
- //
- if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
- Status = EFI_SUCCESS;
- }
- //
- // See if this is an Intel PCI to ISA bridge in Positive Decode Mode
- //
- if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE &&
- Pci.Hdr.VendorId == 0x8086 && Pci.Hdr.DeviceId == 0x7110) {
- Status = EFI_SUCCESS;
- }
- }
- }
- }
- gBS->CloseProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- return Status;
- }
- /**
- Starts a device controller or a bus controller.
- The Start() function is designed to be invoked from the EFI boot service
- ConnectController(). As a result, much of the error checking on the
- parameters to Start() has been moved into this common boot service. It is
- legal to call Start() from other locations, but the following calling
- restrictions must be followed or the system behavior will not be
- deterministic.
- 1. ControllerHandle must be a valid EFI_HANDLE.
- 2. If RemainingDevicePath is not NULL, then it must be a pointer to a
- naturally aligned EFI_DEVICE_PATH_PROTOCOL.
- 3. Prior to calling Start(), the Supported() function for the driver
- specified by This must have been called with the same calling parameters,
- and Supported() must have returned EFI_SUCCESS.
- @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
- instance.
- @param[in] ControllerHandle The handle of the controller to start. This
- handle must support a protocol interface
- that supplies an I/O abstraction to the
- driver.
- @param[in] RemainingDevicePath A pointer to the remaining portion of a
- device path. This parameter is ignored by
- device drivers, and is optional for bus
- drivers. For a bus driver, if this parameter
- is NULL, then handles for all the children
- of Controller are created by this driver. If
- this parameter is not NULL and the first
- Device Path Node is not the End of Device
- Path Node, then only the handle for the
- child device specified by the first Device
- Path Node of RemainingDevicePath is created
- by this driver. If the first Device Path
- Node of RemainingDevicePath is the End of
- Device Path Node, no child handle is created
- by this driver.
- @retval EFI_SUCCESS The device was started.
- @retval EFI_DEVICE_ERROR The device could not be started due to a
- device error.
- @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
- lack of resources.
- @retval Others The driver failed to start the device.
- **/
- EFI_STATUS
- EFIAPI
- PcuSioDriverBindingStart (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Controller,
- IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
- )
- {
- EFI_STATUS Status;
- EFI_PCI_IO_PROTOCOL *PciIo;
- EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
- UINT64 Supports;
- UINT64 OriginalAttributes;
- UINT64 Attributes;
- BOOLEAN Enabled;
- SIO_BUS_DRIVER_PRIVATE_DATA *Private;
- UINT32 ChildDeviceNumber;
- Enabled = FALSE;
- Supports = 0;
- OriginalAttributes = 0;
- Private = NULL;
- //
- // Open the PCI I/O Protocol Interface
- //
- PciIo = NULL;
- Status = gBS->OpenProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- (VOID**) &PciIo,
- This->DriverBindingHandle,
- Controller,
- EFI_OPEN_PROTOCOL_BY_DRIVER
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): No PCI I/O Protocol %r\n", Status));
- return Status;
- }
- //
- // Open Device Path Protocol
- //
- Status = gBS->OpenProtocol (
- Controller,
- &gEfiDevicePathProtocolGuid,
- (VOID **) &ParentDevicePath,
- This->DriverBindingHandle,
- Controller,
- EFI_OPEN_PROTOCOL_BY_DRIVER
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): No Device Path Protocol %r\n", Status));
- gBS->CloseProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- return Status;
- }
- //
- // Get supported PCI attributes
- //
- Status = PciIo->Attributes (
- PciIo,
- EfiPciIoAttributeOperationSupported,
- 0,
- &Supports
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error reading PCI I/O Supported Attributes %r\n", Status));
- goto Done;
- }
- Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_ISA_IO |
- EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
- Status = PciIo->Attributes (
- PciIo,
- EfiPciIoAttributeOperationGet,
- 0,
- &OriginalAttributes
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error reading PCI I/O Attributes %r\n", Status));
- goto Done;
- }
- Attributes = EFI_PCI_DEVICE_ENABLE |
- Supports |
- EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO;
- Status = PciIo->Attributes (
- PciIo,
- EfiPciIoAttributeOperationEnable,
- Attributes,
- NULL
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error enabling PCI I/O Attributes %r\n", Status));
- goto Done;
- }
- Enabled = TRUE;
- //
- // Store the OriginalAttributes for the restore in BindingStop()
- //
- Private = AllocateZeroPool (sizeof (SIO_BUS_DRIVER_PRIVATE_DATA));
- if (Private == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error allocating SIO private data structure %r\n", Status));
- goto Done;
- }
- Private->PciIo = PciIo;
- Private->OriginalAttributes = OriginalAttributes;
- Status = gBS->InstallProtocolInterface (
- &Controller,
- &gEfiCallerIdGuid,
- EFI_NATIVE_INTERFACE,
- Private
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error installing gEfiCallerIdGuid %r\n", Status));
- goto Done;
- }
- //
- // Report status code for the start of general controller initialization
- //
- REPORT_STATUS_CODE_WITH_DEVICE_PATH (
- EFI_PROGRESS_CODE,
- (EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),
- ParentDevicePath
- );
- //
- // Report status code for the start of enabling devices on the bus
- //
- REPORT_STATUS_CODE_WITH_DEVICE_PATH (
- EFI_PROGRESS_CODE,
- (EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),
- ParentDevicePath
- );
- //
- // Create all the children upon the first entrance
- //
- ChildDeviceNumber = SioCreateAllChildDevices (
- This,
- Controller,
- PciIo,
- ParentDevicePath
- );
- if (ChildDeviceNumber == 0) {
- Status = EFI_DEVICE_ERROR;
- DEBUG ((DEBUG_ERROR, "PcuSioDriverBindingStart(): Error creating child SIO devices %r\n", Status));
- goto Done;
- }
- Done:
- if (EFI_ERROR (Status)) {
- if (PciIo != NULL && Enabled) {
- PciIo->Attributes (
- PciIo,
- EfiPciIoAttributeOperationSet,
- OriginalAttributes,
- NULL
- );
- }
- gBS->CloseProtocol (
- Controller,
- &gEfiDevicePathProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- gBS->CloseProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- if (Private != NULL) {
- gBS->UninstallMultipleProtocolInterfaces (
- Controller,
- &gEfiCallerIdGuid,
- Private,
- NULL
- );
- FreePool (Private);
- }
- }
- return Status;
- }
- /**
- Stops a device controller or a bus controller.
- The Stop() function is designed to be invoked from the EFI boot service
- DisconnectController(). As a result, much of the error checking on the
- parameters to Stop() has been moved into this common boot service. It is
- legal to call Stop() from other locations, but the following calling
- restrictions must be followed or the system behavior will not be
- deterministic.
- 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous
- call to this same driver's Start() function.
- 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
- valid EFI_HANDLE. In addition, all of these handles must have been created
- in this driver's Start() function, and the Start() function must have
- called OpenProtocol() on ControllerHandle with an Attribute of
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
- @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
- instance.
- @param[in] ControllerHandle A handle to the device being stopped. The
- handle must support a bus specific I/O
- protocol for the driver to use to stop the
- device.
- @param[in] NumberOfChildren The number of child device handles in
- ChildHandleBuffer.
- @param[in] ChildHandleBuffer An array of child handles to be freed. May be
- NULL if NumberOfChildren is 0.
- @retval EFI_SUCCESS The device was stopped.
- @retval EFI_DEVICE_ERROR The device could not be stopped due to a
- device error.
- **/
- EFI_STATUS
- EFIAPI
- PcuSioDriverBindingStop (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Controller,
- IN UINTN NumberOfChildren,
- IN EFI_HANDLE *ChildHandleBuffer
- )
- {
- EFI_STATUS Status;
- SIO_BUS_DRIVER_PRIVATE_DATA *Private;
- UINTN Index;
- BOOLEAN AllChildrenStopped;
- EFI_SIO_PROTOCOL *Sio;
- SIO_DEV *SioDevice;
- EFI_PCI_IO_PROTOCOL *PciIo;
- if (NumberOfChildren == 0) {
- //
- // Restore PCI attributes
- //
- Status = gBS->OpenProtocol (
- Controller,
- &gEfiCallerIdGuid,
- (VOID **) &Private,
- This->DriverBindingHandle,
- Controller,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- Status = Private->PciIo->Attributes (
- Private->PciIo,
- EfiPciIoAttributeOperationSet,
- Private->OriginalAttributes,
- NULL
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- gBS->UninstallProtocolInterface (
- Controller,
- &gEfiCallerIdGuid,
- Private
- );
- FreePool (Private);
- //
- // Close the bus driver
- //
- Status = gBS->CloseProtocol (
- Controller,
- &gEfiDevicePathProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- Status = gBS->CloseProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- This->DriverBindingHandle,
- Controller
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
- return EFI_SUCCESS;
- }
- //
- // Stop all the children
- //
- AllChildrenStopped = TRUE;
- for (Index = 0; Index < NumberOfChildren; Index++) {
- Status = gBS->OpenProtocol (
- ChildHandleBuffer[Index],
- &gEfiSioProtocolGuid,
- (VOID **) &Sio,
- This->DriverBindingHandle,
- Controller,
- EFI_OPEN_PROTOCOL_GET_PROTOCOL
- );
- if (!EFI_ERROR (Status)) {
- SioDevice = SIO_DEV_FROM_SIO (Sio);
- //
- // Close the child handle
- //
- Status = gBS->CloseProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- This->DriverBindingHandle,
- ChildHandleBuffer[Index]
- );
- Status = gBS->UninstallMultipleProtocolInterfaces (
- ChildHandleBuffer[Index],
- &gEfiDevicePathProtocolGuid,
- SioDevice->DevicePath,
- &gEfiSioProtocolGuid,
- &SioDevice->Sio,
- NULL
- );
- if (!EFI_ERROR (Status)) {
- FreePool (SioDevice->DevicePath);
- FreePool (SioDevice);
- } else {
- //
- // Re-open PCI IO Protocol on behalf of the child device
- // because of failure of destroying the child device handle
- //
- gBS->OpenProtocol (
- Controller,
- &gEfiPciIoProtocolGuid,
- (VOID **) &PciIo,
- This->DriverBindingHandle,
- ChildHandleBuffer[Index],
- EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
- );
- }
- }
- if (EFI_ERROR (Status)) {
- AllChildrenStopped = FALSE;
- }
- }
- if (!AllChildrenStopped) {
- return EFI_DEVICE_ERROR;
- }
- return EFI_SUCCESS;
- }
- /**
- The entry point for the PCU SIO driver.
- @param[in] ImageHandle The firmware allocated handle for the EFI image.
- @param[in] SystemTable A pointer to the EFI System Table.
- @retval EFI_SUCCESS The entry point is executed successfully.
- @retval other Some error occurs when executing this entry point.
- **/
- EFI_STATUS
- EFIAPI
- PcuSioDriverEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
- {
- return EfiLibInstallDriverBinding (
- ImageHandle,
- SystemTable,
- &gPcuSioDriverBinding,
- ImageHandle
- );
- }
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