MdePkg/Include/Protocol/SmmUsbDispatch2.h

   1 /** @file
   2   SMM USB Dispatch2 Protocol as defined in PI 1.1 Specification
   3   Volume 4 System Management Mode Core Interface.
   4
   5   Provides the parent dispatch service for the USB SMI source generator.
   6
   7   Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
   8   This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16   @par Revision Reference:
  17   This protocol is from PI Version 1.1.
  18
  19 **/
  20
  21 #ifndef _SMM_USB_DISPATCH2_H_
  22 #define _SMM_USB_DISPATCH2_H_
  23
  24 #include <Pi/PiSmmCis.h>
  25
  26 #define EFI_SMM_USB_DISPATCH2_PROTOCOL_GUID \
  27   { \
  28     0xee9b8d90, 0xc5a6, 0x40a2, {0xbd, 0xe2, 0x52, 0x55, 0x8d, 0x33, 0xcc, 0xa1 } \
  29   }
  30
  31 ///
  32 /// USB SMI event types
  33 ///
  34 typedef enum {
  35   UsbLegacy,
  36   UsbWake
  37 } EFI_USB_SMI_TYPE;
  38
  39 ///
  40 /// The dispatch function's context.
  41 ///
  42 typedef struct {
  43   ///
  44   /// Describes whether this child handler will be invoked in response to a USB legacy
  45   /// emulation event, such as port-trap on the PS/2* keyboard control registers, or to a
  46   /// USB wake event, such as resumption from a sleep state.
  47   ///
  48   EFI_USB_SMI_TYPE          Type;
  49   ///
  50   /// The device path is part of the context structure and describes the location of the
  51   /// particular USB host controller in the system for which this register event will occur.
  52   /// This location is important because of the possible integration of several USB host
  53   /// controllers in a system.
  54   ///
  55   EFI_DEVICE_PATH_PROTOCOL  *Device;
  56 } EFI_SMM_USB_REGISTER_CONTEXT;
  57
  58 typedef struct _EFI_SMM_USB_DISPATCH2_PROTOCOL EFI_SMM_USB_DISPATCH2_PROTOCOL;
  59
  60 /**
  61   Provides the parent dispatch service for the USB SMI source generator.
  62
  63   This service registers a function (DispatchFunction) which will be called when the USB-
  64   related SMI specified by RegisterContext has occurred. On return, DispatchHandle
  65   contains a unique handle which may be used later to unregister the function using UnRegister().
  66   The DispatchFunction will be called with Context set to the same value as was passed into
  67   this function in RegisterContext and with CommBuffer containing NULL and
  68   CommBufferSize containing zero.
  69
  70   @param[in]  This               Pointer to the EFI_SMM_USB_DISPATCH2_PROTOCOL instance.
  71   @param[in]  DispatchFunction   Function to register for handler when a USB-related SMI occurs.
  72   @param[in]  RegisterContext    Pointer to the dispatch function's context.
  73                                  The caller fills this context in before calling
  74                                  the register function to indicate to the register
  75                                  function the USB SMI types for which the dispatch
  76                                  function should be invoked.
  77   @param[out] DispatchHandle     Handle generated by the dispatcher to track the function instance.
  78
  79   @retval EFI_SUCCESS            The dispatch function has been successfully
  80                                  registered and the SMI source has been enabled.
  81   @retval EFI_DEVICE_ERROR       The driver was unable to enable the SMI source.
  82   @retval EFI_INVALID_PARAMETER  RegisterContext is invalid. The USB SMI type
  83                                  is not within valid range.
  84   @retval EFI_OUT_OF_RESOURCES   There is not enough memory (system or SMM) to manage this child.
  85 **/
  86 typedef
  87 EFI_STATUS
  88 (EFIAPI *EFI_SMM_USB_REGISTER2)(
  89   IN  CONST EFI_SMM_USB_DISPATCH2_PROTOCOL  *This,
  90   IN        EFI_SMM_HANDLER_ENTRY_POINT2    DispatchFunction,
  91   IN  CONST EFI_SMM_USB_REGISTER_CONTEXT    *RegisterContext,
  92   OUT       EFI_HANDLE                      *DispatchHandle
  93   );
  94
  95 /**
  96   Unregisters a USB service.
  97
  98   This service removes the handler associated with DispatchHandle so that it will no longer be
  99   called when the USB event occurs.
 100
 101   @param[in]  This               Pointer to the EFI_SMM_USB_DISPATCH2_PROTOCOL instance.
 102   @param[in]  DispatchHandle     Handle of the service to remove.
 103
 104   @retval EFI_SUCCESS            The dispatch function has been successfully
 105                                  unregistered and the SMI source has been disabled
 106                                  if there are no other registered child dispatch
 107                                  functions for this SMI source.
 108   @retval EFI_INVALID_PARAMETER  The DispatchHandle was not valid.
 109 **/
 110 typedef
 111 EFI_STATUS
 112 (EFIAPI *EFI_SMM_USB_UNREGISTER2)(
 113   IN CONST EFI_SMM_USB_DISPATCH2_PROTOCOL  *This,
 114   IN       EFI_HANDLE                      DispatchHandle
 115   );
 116
 117 ///
 118 /// Interface structure for the SMM USB SMI Dispatch2 Protocol
 119 ///
 120 /// This protocol provides the parent dispatch service for the USB SMI source generator.
 121 ///
 122 struct _EFI_SMM_USB_DISPATCH2_PROTOCOL {
 123   EFI_SMM_USB_REGISTER2    Register;
 124   EFI_SMM_USB_UNREGISTER2  UnRegister;
 125 };
 126
 127 extern EFI_GUID gEfiSmmUsbDispatch2ProtocolGuid;
 128
 129 #endif
 130