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/** @file
Provides the parent dispatch service for the USB SMI source generator.
Copyright (c) 2007 - 2009, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@par Revision Reference:
This Protocol is defined in Framework of EFI SMM Core Interface Spec
Version 0.9.
**/
#ifndef _EFI_SMM_USB_DISPATCH_H_
#define _EFI_SMM_USB_DISPATCH_H_
#include <PiDxe.h>
//
// Global ID for the USB Protocol
//
#define EFI_SMM_USB_DISPATCH_PROTOCOL_GUID \
{ \
0xa05b6ffd, 0x87af, 0x4e42, {0x95, 0xc9, 0x62, 0x28, 0xb6, 0x3c, 0xf3, 0xf3 } \
}
typedef struct _EFI_SMM_USB_DISPATCH_PROTOCOL EFI_SMM_USB_DISPATCH_PROTOCOL;
//
// Related Definitions
//
typedef enum {
UsbLegacy,
UsbWake
} EFI_USB_SMI_TYPE;
typedef struct {
///
/// Describes whether this child handler will be invoked in response to a USB legacy
/// emulation event, such as port-trap on the PS/2* keyboard control registers, or to a
/// USB wake event, such as resumption from a sleep state.
///
EFI_USB_SMI_TYPE Type;
///
/// The device path is part of the context structure and describes the location of the
/// particular USB host controller in the system for which this register event will occur.
/// This location is important because of the possible integration of several USB host
/// controllers in a system.
///
EFI_DEVICE_PATH_PROTOCOL *Device;
} EFI_SMM_USB_DISPATCH_CONTEXT;
//
// Member functions
//
/**
Dispatch function for a USB SMI handler.
@param[in] DispatchHandle Handle of this dispatch function.
@param[in] DispatchContext Pointer to the dispatch function's context.
The DispatchContext fields are filled in
by the dispatching driver prior to
invoking this dispatch function.
**/
typedef
VOID
(EFIAPI *EFI_SMM_USB_DISPATCH)(
IN EFI_HANDLE DispatchHandle,
IN EFI_SMM_USB_DISPATCH_CONTEXT *DispatchContext
);
/**
Register a child SMI source dispatch function with a parent SMM driver.
@param[in] This Pointer to the EFI_SMM_USB_DISPATCH_PROTOCOL instance.
@param[in] DispatchFunction Pointer to dispatch function to be invoked
for this SMI source.
@param[in] DispatchContext Pointer to the dispatch function's context.
The caller fills this context in before calling
the register function to indicate to the register
function the USB SMI types for which the dispatch
function should be invoked.
@param[out] DispatchHandle Handle generated by the dispatcher to track the
function instance.
@retval EFI_SUCCESS The dispatch function has been successfully
registered and the SMI source has been enabled.
@retval EFI_DEVICE_ERROR The driver was unable to enable the SMI source.
@retval EFI_OUT_OF_RESOURCES Not enough memory (system or SMM) to manage this
child.
@retval EFI_INVALID_PARAMETER DispatchContext is invalid. The USB SMI type
is not within valid range.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_USB_REGISTER)(
IN EFI_SMM_USB_DISPATCH_PROTOCOL *This,
IN EFI_SMM_USB_DISPATCH DispatchFunction,
IN EFI_SMM_USB_DISPATCH_CONTEXT *DispatchContext,
OUT EFI_HANDLE *DispatchHandle
);
/**
Unregisters a USB service.
@param[in] This Pointer to the EFI_SMM_USB_DISPATCH_PROTOCOL instance.
@param[in] DispatchHandle Handle of the service to remove.
@retval EFI_SUCCESS The dispatch function has been successfully
unregistered and the SMI source has been disabled
if there are no other registered child dispatch
functions for this SMI source.
@retval EFI_INVALID_PARAMETER The DispatchHandle was not valid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_USB_UNREGISTER)(
IN EFI_SMM_USB_DISPATCH_PROTOCOL *This,
IN EFI_HANDLE DispatchHandle
);
///
/// The EFI_SMM_USB_DISPATCH_PROTOCOL provides the ability to install child handlers for the
/// given event types.
///
struct _EFI_SMM_USB_DISPATCH_PROTOCOL {
EFI_SMM_USB_REGISTER Register;
EFI_SMM_USB_UNREGISTER UnRegister;
};
extern EFI_GUID gEfiSmmUsbDispatchProtocolGuid;
#endif
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