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- /** @file
- Super I/O Interface implementation.
- Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "SioDriver.h"
- /**
- 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. Type ACPI_RESOURCE_HEADER_PTR is defined in the "Related
- Definitions" below.
- @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 *SioDev;
- if (ResourceList == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- SioDev = SIO_DEV_FROM_THIS (This);
- return DeviceGetResources (&SioDev->Device, ResourceList);
- }
- /**
- 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
- )
- {
- SIO_DEV *SioDev;
- if (ResourceCollection == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- SioDev = SIO_DEV_FROM_THIS (This);
- return DevicePossibleResources (&SioDev->Device, ResourceCollection);
- }
- /**
- 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. Type ACPI_RESOURCE_HEADER_PTR
- is defined in the "Related Definitions" section of
- EFI_SIO_PROTOCOL.GetResources().
- @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
- )
- {
- SIO_DEV *SioDev;
- ACPI_RESOURCE_HEADER_PTR ResourcePtr;
- ACPI_RESOURCE_HEADER_PTR ResourceCollection;
- ACPI_RESOURCE_HEADER_PTR ResourcePtr2;
- BOOLEAN Found;
- ResourcePtr = ResourceList;
- SioDev = SIO_DEV_FROM_THIS (This);
- //
- // Check whether the resource is in the possible resource collection
- //
- DevicePossibleResources (&SioDev->Device, &ResourceCollection);
- while (ResourcePtr.SmallHeader->Byte != ACPI_END_TAG_DESCRIPTOR) {
- Found = FALSE;
- ResourcePtr2 = ResourceCollection;
- while (ResourcePtr2.SmallHeader->Byte != ACPI_END_TAG_DESCRIPTOR) {
- if (ResourcePtr2.SmallHeader->Bits.Type == 0) {
- //
- // Small Header
- //
- if (CompareMem (
- ResourcePtr2.SmallHeader,
- ResourcePtr.SmallHeader,
- ResourcePtr2.SmallHeader->Bits.Length + sizeof (*ResourcePtr2.SmallHeader)
- ) == 0) {
- Found = TRUE;
- break;
- }
- ResourcePtr2.SmallHeader = (ACPI_SMALL_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr2.SmallHeader
- + ResourcePtr2.SmallHeader->Bits.Length
- + sizeof (*ResourcePtr2.SmallHeader));
- } else {
- //
- // Large Header
- //
- if (CompareMem (
- ResourcePtr2.LargeHeader,
- ResourcePtr.LargeHeader,
- ResourcePtr2.LargeHeader->Length + sizeof (*ResourcePtr2.LargeHeader)
- ) == 0) {
- Found = TRUE;
- break;
- }
- ResourcePtr2.LargeHeader = (ACPI_LARGE_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr2.LargeHeader
- + ResourcePtr2.LargeHeader->Length
- + sizeof (*ResourcePtr2.LargeHeader));
- }
- }
- if (!Found) {
- return EFI_ACCESS_DENIED;
- }
- if (ResourcePtr.SmallHeader->Bits.Type == 0) {
- ResourcePtr.SmallHeader = (ACPI_SMALL_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr.SmallHeader
- + ResourcePtr.SmallHeader->Bits.Length
- + sizeof (*ResourcePtr.SmallHeader));
- } else {
- ResourcePtr.LargeHeader = (ACPI_LARGE_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr.LargeHeader
- + ResourcePtr.LargeHeader->Length
- + sizeof (*ResourcePtr.LargeHeader));
- }
- }
- //
- // ResourceList can be set
- //
- return DeviceSetResources (&SioDev->Device, ResourceList);
- }
- /**
- 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
- )
- {
- if (Value == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- 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.
- Type EFI_SIO_REGISTER_MODIFY is defined in the "Related Definitions" below.
- @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
- )
- {
- if (Command == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- return EFI_SUCCESS;
- }
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