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125 lines
4.7 KiB
C
125 lines
4.7 KiB
C
/** @file
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MM USB Dispatch Protocol as defined in PI 1.5 Specification
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Volume 4 Management Mode Core Interface.
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Provides the parent dispatch service for the USB MMI source generator.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This protocol is from PI Version 1.5.
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**/
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#ifndef _MM_USB_DISPATCH_H_
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#define _MM_USB_DISPATCH_H_
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#include <Pi/PiMmCis.h>
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#define EFI_MM_USB_DISPATCH_PROTOCOL_GUID \
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{ \
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0xee9b8d90, 0xc5a6, 0x40a2, {0xbd, 0xe2, 0x52, 0x55, 0x8d, 0x33, 0xcc, 0xa1 } \
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}
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///
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/// USB MMI event types
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///
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typedef enum {
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UsbLegacy,
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UsbWake
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} EFI_USB_MMI_TYPE;
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///
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/// The dispatch function's context.
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///
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typedef struct {
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///
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/// Describes whether this child handler will be invoked in response to a USB legacy
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/// emulation event, such as port-trap on the PS/2* keyboard control registers, or to a
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/// USB wake event, such as resumption from a sleep state.
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///
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EFI_USB_MMI_TYPE Type;
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///
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/// The device path is part of the context structure and describes the location of the
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/// particular USB host controller in the system for which this register event will occur.
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/// This location is important because of the possible integration of several USB host
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/// controllers in a system.
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///
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EFI_DEVICE_PATH_PROTOCOL *Device;
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} EFI_MM_USB_REGISTER_CONTEXT;
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typedef struct _EFI_MM_USB_DISPATCH_PROTOCOL EFI_MM_USB_DISPATCH_PROTOCOL;
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/**
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Provides the parent dispatch service for the USB MMI source generator.
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This service registers a function (DispatchFunction) which will be called when the USB-
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related MMI specified by RegisterContext has occurred. On return, DispatchHandle
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contains a unique handle which may be used later to unregister the function using UnRegister().
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The DispatchFunction will be called with Context set to the same value as was passed into
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this function in RegisterContext and with CommBuffer containing NULL and
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CommBufferSize containing zero.
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@param[in] This Pointer to the EFI_MM_USB_DISPATCH_PROTOCOL instance.
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@param[in] DispatchFunction Function to register for handler when a USB-related MMI occurs.
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@param[in] RegisterContext Pointer to the dispatch function's context.
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The caller fills this context in before calling
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the register function to indicate to the register
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function the USB MMI types for which the dispatch
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function should be invoked.
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@param[out] DispatchHandle Handle generated by the dispatcher to track the function instance.
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@retval EFI_SUCCESS The dispatch function has been successfully
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registered and the MMI source has been enabled.
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@retval EFI_DEVICE_ERROR The driver was unable to enable the MMI source.
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@retval EFI_INVALID_PARAMETER RegisterContext is invalid. The USB MMI type
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is not within valid range.
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@retval EFI_OUT_OF_RESOURCES There is not enough memory (system or MM) to manage this child.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_MM_USB_REGISTER)(
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IN CONST EFI_MM_USB_DISPATCH_PROTOCOL *This,
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IN EFI_MM_HANDLER_ENTRY_POINT DispatchFunction,
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IN CONST EFI_MM_USB_REGISTER_CONTEXT *RegisterContext,
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OUT EFI_HANDLE *DispatchHandle
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);
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/**
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Unregisters a USB service.
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This service removes the handler associated with DispatchHandle so that it will no longer be
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called when the USB event occurs.
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@param[in] This Pointer to the EFI_MM_USB_DISPATCH_PROTOCOL instance.
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@param[in] DispatchHandle Handle of the service to remove.
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@retval EFI_SUCCESS The dispatch function has been successfully
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unregistered and the MMI source has been disabled
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if there are no other registered child dispatch
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functions for this MMI source.
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@retval EFI_INVALID_PARAMETER The DispatchHandle was not valid.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_MM_USB_UNREGISTER)(
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IN CONST EFI_MM_USB_DISPATCH_PROTOCOL *This,
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IN EFI_HANDLE DispatchHandle
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);
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///
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/// Interface structure for the MM USB MMI Dispatch Protocol
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///
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/// This protocol provides the parent dispatch service for the USB MMI source generator.
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///
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struct _EFI_MM_USB_DISPATCH_PROTOCOL {
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EFI_MM_USB_REGISTER Register;
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EFI_MM_USB_UNREGISTER UnRegister;
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};
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extern EFI_GUID gEfiMmUsbDispatchProtocolGuid;
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#endif
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