MdePkg/Include/Protocol/MmStandbyButtonDispatch.h

   1 /** @file
   2   MM Standby Button Dispatch Protocol as defined in PI 1.5 Specification
   3   Volume 4 Management Mode Core Interface.
   4
   5   This protocol provides the parent dispatch service for the standby button MMI source generator.
   6
   7   Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   8   SPDX-License-Identifier: BSD-2-Clause-Patent
   9
  10   @par Revision Reference:
  11   This protocol is from PI Version 1.5.
  12
  13 **/
  14
  15 #ifndef _MM_STANDBY_BUTTON_DISPATCH_H_
  16 #define _MM_STANDBY_BUTTON_DISPATCH_H_
  17
  18 #include <Pi/PiMmCis.h>
  19
  20 #define EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL_GUID \
  21   { \
  22     0x7300c4a1, 0x43f2, 0x4017, {0xa5, 0x1b, 0xc8, 0x1a, 0x7f, 0x40, 0x58, 0x5b } \
  23   }
  24
  25 ///
  26 /// Standby Button phases
  27 ///
  28 typedef enum {
  29   EfiStandbyButtonEntry,
  30   EfiStandbyButtonExit,
  31   EfiStandbyButtonMax
  32 } EFI_STANDBY_BUTTON_PHASE;
  33
  34 ///
  35 /// The dispatch function's context.
  36 ///
  37 typedef struct {
  38   ///
  39   /// Describes whether the child handler should be invoked upon the entry to the button
  40   /// activation or upon exit.
  41   ///
  42   EFI_STANDBY_BUTTON_PHASE  Phase;
  43 } EFI_MM_STANDBY_BUTTON_REGISTER_CONTEXT;
  44
  45 typedef struct _EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL;
  46
  47 /**
  48   Provides the parent dispatch service for a standby button event.
  49
  50   This service registers a function (DispatchFunction) which will be called when an MMI is
  51   generated because the standby button was pressed or released, as specified by
  52   RegisterContext. On return, DispatchHandle contains a unique handle which may be used
  53   later to unregister the function using UnRegister().
  54   The DispatchFunction will be called with Context set to the same value as was passed into
  55   this function in RegisterContext and with CommBuffer and CommBufferSize set to NULL.
  56
  57   @param[in]  This               Pointer to the EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL instance.
  58   @param[in]  DispatchFunction   Function to register for handler when the standby button is pressed or released.
  59   @param[in]  RegisterContext    Pointer to the dispatch function's context. The caller fills in this context
  60                                  before calling the register function to indicate to the register function the
  61                                  standby button MMI source for which the dispatch function should be invoked.
  62   @param[out] DispatchHandle     Handle generated by the dispatcher to track the function instance.
  63
  64   @retval EFI_SUCCESS            The dispatch function has been successfully
  65                                  registered and the MMI source has been enabled.
  66   @retval EFI_DEVICE_ERROR       The driver was unable to enable the MMI source.
  67   @retval EFI_INVALID_PARAMETER  RegisterContext is invalid. The standby button input value
  68                                  is not within valid range.
  69   @retval EFI_OUT_OF_RESOURCES   There is not enough memory (system or MM) to manage this child.
  70 **/
  71 typedef
  72 EFI_STATUS
  73 (EFIAPI *EFI_MM_STANDBY_BUTTON_REGISTER)(
  74   IN CONST EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL  *This,
  75   IN       EFI_MM_HANDLER_ENTRY_POINT               DispatchFunction,
  76   IN       EFI_MM_STANDBY_BUTTON_REGISTER_CONTEXT   *RegisterContext,
  77   OUT      EFI_HANDLE                               *DispatchHandle
  78   );
  79
  80 /**
  81   Unregisters a child MMI source dispatch function with a parent MM driver.
  82
  83   This service removes the handler associated with DispatchHandle so that it will no longer be
  84   called when the standby button is pressed or released.
  85
  86   @param[in] This                Pointer to the EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL instance.
  87   @param[in] DispatchHandle      Handle of the service to remove.
  88
  89   @retval EFI_SUCCESS            The service has been successfully removed.
  90   @retval EFI_INVALID_PARAMETER  The DispatchHandle was not valid.
  91 **/
  92 typedef
  93 EFI_STATUS
  94 (EFIAPI *EFI_MM_STANDBY_BUTTON_UNREGISTER)(
  95   IN CONST EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL  *This,
  96   IN       EFI_HANDLE                               DispatchHandle
  97   );
  98
  99 ///
 100 /// Interface structure for the MM Standby Button Dispatch Protocol.
 101 ///
 102 /// This protocol provides the parent dispatch service for the standby
 103 /// button MMI source generator.
 104 ///
 105 struct _EFI_MM_STANDBY_BUTTON_DISPATCH_PROTOCOL {
 106   EFI_MM_STANDBY_BUTTON_REGISTER    Register;
 107   EFI_MM_STANDBY_BUTTON_UNREGISTER  UnRegister;
 108 };
 109
 110 extern EFI_GUID gEfiMmStandbyButtonDispatchProtocolGuid;
 111
 112 #endif
 113