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176 lines
7.7 KiB
176 lines
7.7 KiB
/** @file
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The Super I/O Protocol is installed by the Super I/O driver. The Super I/O driver is a UEFI driver
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model compliant driver. In the Start() routine of the Super I/O driver, a handle with an instance
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of EFI_SIO_PROTOCOL is created for each device within the Super I/O. The device within the
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Super I/O is powered up, enabled, and assigned with the default set of resources. In the Stop()
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routine of the Super I/O driver, the device is disabled and Super I/O protocol is uninstalled.
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Copyright (c) 2006 - 2018, 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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#ifndef __EFI_SUPER_IO_PROTOCOL_H__
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#define __EFI_SUPER_IO_PROTOCOL_H__
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#include <IndustryStandard/Acpi.h>
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#define EFI_SIO_PROTOCOL_GUID \
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{ 0x215fdd18, 0xbd50, 0x4feb, { 0x89, 0xb, 0x58, 0xca, 0xb, 0x47, 0x39, 0xe9 } }
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typedef union {
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ACPI_SMALL_RESOURCE_HEADER *SmallHeader;
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ACPI_LARGE_RESOURCE_HEADER *LargeHeader;
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} ACPI_RESOURCE_HEADER_PTR;
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typedef struct {
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UINT8 Register; ///< Register number.
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UINT8 AndMask; ///< Bitwise AND mask.
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UINT8 OrMask; ///< Bitwise OR mask.
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} EFI_SIO_REGISTER_MODIFY;
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typedef struct _EFI_SIO_PROTOCOL EFI_SIO_PROTOCOL;
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/**
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Provides a low level access to the registers for the Super I/O.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] Write Specifies the type of the register operation. If this parameter is TRUE, Value is
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interpreted as an input parameter and the operation is a register write. If this parameter
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is FALSE, Value is interpreted as an output parameter and the operation is a register
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read.
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@param[in] ExitCfgMode Exit Configuration Mode Indicator. If this parameter is set to TRUE, the Super I/O
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driver will turn off configuration mode of the Super I/O prior to returning from this
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function. If this parameter is set to FALSE, the Super I/O driver will leave Super I/O
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in the configuration mode.
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The Super I/O driver must track the current state of the Super I/O and enable the
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configuration mode of Super I/O if necessary prior to register access.
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@param[in] Register Register number.
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@param[in, out] Value If Write is TRUE, Value is a pointer to the buffer containing the byte of data to be
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written to the Super I/O register. If Write is FALSE, Value is a pointer to the
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destination buffer for the byte of data to be read from the Super I/O register.
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@retval EFI_SUCCESS The operation completed successfully
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@retval EFI_INVALID_PARAMETER The Value is NULL
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@retval EFI_INVALID_PARAMETER Invalid Register number
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SIO_REGISTER_ACCESS)(
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IN CONST EFI_SIO_PROTOCOL *This,
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IN BOOLEAN Write,
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IN BOOLEAN ExitCfgMode,
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IN UINT8 Register,
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IN OUT UINT8 *Value
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);
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/**
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Provides an interface to get a list of the current resources consumed by the device in the ACPI
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Resource Descriptor format.
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GetResources() returns a list of resources currently consumed by the device. The
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ResourceList is a pointer to the buffer containing resource descriptors for the device. The
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descriptors are in the format of Small or Large ACPI resource descriptor as defined by ACPI
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specification (2.0 & 3.0). The buffer of resource descriptors is terminated with the 'End tag'
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resource descriptor.
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@param[in] This Indicates a pointer to the calling context.
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@param[out] ResourceList A pointer to an ACPI resource descriptor list that defines the current resources used by
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the device. Type ACPI_RESOURCE_HEADER_PTR is defined in the "Related
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Definitions" below.
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@retval EFI_SUCCESS The operation completed successfully
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@retval EFI_INVALID_PARAMETER ResourceList is NULL
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SIO_GET_RESOURCES)(
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IN CONST EFI_SIO_PROTOCOL *This,
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OUT ACPI_RESOURCE_HEADER_PTR *ResourceList
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);
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/**
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Sets the resources for the device.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] ResourceList Pointer to the ACPI resource descriptor list. Type ACPI_RESOURCE_HEADER_PTR
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is defined in the "Related Definitions" section of
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EFI_SIO_PROTOCOL.GetResources().
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@retval EFI_SUCCESS The operation completed successfully
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@retval EFI_INVALID_PARAMETER ResourceList is invalid
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@retval EFI_ACCESS_DENIED Some of the resources in ResourceList are in use
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SIO_SET_RESOURCES)(
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IN CONST EFI_SIO_PROTOCOL *This,
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IN ACPI_RESOURCE_HEADER_PTR ResourceList
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);
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/**
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Provides a collection of resource descriptor lists. Each resource descriptor list in the collection
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defines a combination of resources that can potentially be used by the device.
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@param[in] This Indicates a pointer to the calling context.
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@param[out] ResourceCollection Collection of the resource descriptor lists.
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@retval EFI_SUCCESS The operation completed successfully
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@retval EFI_INVALID_PARAMETER ResourceCollection is NULL
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SIO_POSSIBLE_RESOURCES)(
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IN CONST EFI_SIO_PROTOCOL *This,
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OUT ACPI_RESOURCE_HEADER_PTR *ResourceCollection
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);
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/**
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Provides an interface for a table based programming of the Super I/O registers.
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The Modify() function provides an interface for table based programming of the Super I/O
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registers. This function can be used to perform programming of multiple Super I/O registers with a
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single function call. For each table entry, the Register is read, its content is bitwise ANDed with
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AndMask, and then ORed with OrMask before being written back to the Register. The Super
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I/O driver must track the current state of the Super I/O and enable the configuration mode of Super I/
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O if necessary prior to table processing. Once the table is processed, the Super I/O device has to be
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returned to the original state.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] Command A pointer to an array of NumberOfCommands EFI_SIO_REGISTER_MODIFY
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structures. Each structure specifies a single Super I/O register modify operation. Type
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EFI_SIO_REGISTER_MODIFY is defined in the "Related Definitions" below.
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@param[in] NumberOfCommands Number of elements in the Command array.
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@retval EFI_SUCCESS The operation completed successfully
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@retval EFI_INVALID_PARAMETER Command is NULL
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SIO_MODIFY)(
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IN CONST EFI_SIO_PROTOCOL *This,
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IN CONST EFI_SIO_REGISTER_MODIFY *Command,
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IN UINTN NumberOfCommands
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);
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struct _EFI_SIO_PROTOCOL {
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EFI_SIO_REGISTER_ACCESS RegisterAccess;
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EFI_SIO_GET_RESOURCES GetResources;
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EFI_SIO_SET_RESOURCES SetResources;
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EFI_SIO_POSSIBLE_RESOURCES PossibleResources;
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EFI_SIO_MODIFY Modify;
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};
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extern EFI_GUID gEfiSioProtocolGuid;
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#endif // __EFI_SUPER_IO_PROTOCOL_H__
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