/** @file
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.
Copyright (c) 2018, Linaro Ltd. 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.
**/
#ifndef _VIRTUAL_KEYBOARD_H_
#define _VIRTUAL_KEYBOARD_H_
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
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#include
#include
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//
// Driver Binding Externs
//
extern EFI_DRIVER_BINDING_PROTOCOL gVirtualKeyboardDriverBinding;
extern EFI_COMPONENT_NAME_PROTOCOL gVirtualKeyboardComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL gVirtualKeyboardComponentName2;
//
// VIRTUAL Keyboard Defines
//
#define CHAR_SCANCODE 0xe0
#define CHAR_ESC 0x1b
#define KEYBOARD_TIMEOUT 65536 // 0.07s
#define KEYBOARD_WAITFORVALUE_TIMEOUT 1000000 // 1s
#define KEYBOARD_BAT_TIMEOUT 4000000 // 4s
#define KEYBOARD_TIMER_INTERVAL 500000 // 0.5s
#define QUEUE_MAX_COUNT 32
#define KEYBOARD_SCAN_CODE_MAX_COUNT 32
//
// VIRTUAL Keyboard Device Structure
//
#define VIRTUAL_KEYBOARD_DEV_SIGNATURE SIGNATURE_32 ('V', 'K', 'B', 'D')
#define VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE SIGNATURE_32 ('v', 'k', 'c', 'n')
typedef struct _VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY {
UINTN Signature;
EFI_KEY_DATA KeyData;
EFI_KEY_NOTIFY_FUNCTION KeyNotificationFn;
LIST_ENTRY NotifyEntry;
} VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY;
typedef struct {
UINTN Front;
UINTN Rear;
EFI_KEY_DATA Buffer[QUEUE_MAX_COUNT];
} SIMPLE_QUEUE;
typedef struct {
UINT8 Buffer[KEYBOARD_SCAN_CODE_MAX_COUNT];
UINTN Head;
UINTN Tail;
} SCAN_CODE_QUEUE;
typedef struct {
UINTN Signature;
EFI_HANDLE Handle;
PLATFORM_VIRTUAL_KBD_PROTOCOL *PlatformVirtual;
EFI_SIMPLE_TEXT_INPUT_PROTOCOL SimpleTextIn;
EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL SimpleTextInputEx;
//
// Buffer storing EFI_KEY_DATA
//
SIMPLE_QUEUE Queue;
SIMPLE_QUEUE QueueForNotify;
//
// Notification Function List
//
LIST_ENTRY NotifyList;
EFI_EVENT KeyNotifyProcessEvent;
EFI_EVENT TimerEvent;
} VIRTUAL_KEYBOARD_DEV;
#define VIRTUAL_KEYBOARD_DEV_FROM_THIS(a) CR (a, VIRTUAL_KEYBOARD_DEV, SimpleTextIn, VIRTUAL_KEYBOARD_DEV_SIGNATURE)
#define TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS(a) \
CR (a, \
VIRTUAL_KEYBOARD_DEV, \
SimpleTextInputEx, \
VIRTUAL_KEYBOARD_DEV_SIGNATURE \
)
//
// Global Variables
//
extern EFI_DRIVER_BINDING_PROTOCOL gVirtualKeyboardDriverBinding;
//
// Driver Binding Protocol functions
//
/**
Check whether the driver supports this device.
@param This The Udriver binding protocol.
@param Controller The controller handle to check.
@param RemainingDevicePath The remaining device path.
@retval EFI_SUCCESS The driver supports this controller.
@retval other This device isn't supported.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
);
/**
Starts the device with this driver.
@param This The driver binding instance.
@param Controller Handle of device to bind driver to.
@param RemainingDevicePath Optional parameter use to pick a specific child
device to start.
@retval EFI_SUCCESS The controller is controlled by the driver.
@retval Other This controller cannot be started.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
);
/**
Stop the device handled by this driver.
@param This The driver binding protocol.
@param Controller The controller to release.
@param NumberOfChildren The number of handles in ChildHandleBuffer.
@param ChildHandleBuffer The array of child handle.
@retval EFI_SUCCESS The device was stopped.
@retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
@retval Others Fail to uninstall protocols attached on the device.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
);
/**
Retrieves a Unicode string that is the user readable name of the driver.
This function retrieves the user readable name of a driver in the form of a
Unicode string. If the driver specified by This has a user readable name in
the language specified by Language, then a pointer to the driver name is
returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
by This does not support the language specified by Language,
then EFI_UNSUPPORTED is returned.
@param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
EFI_COMPONENT_NAME_PROTOCOL instance.
@param Language[in] A pointer to a Null-terminated ASCII string
array indicating the language. This is the
language of the driver name that the caller is
requesting, and it must match one of the
languages specified in SupportedLanguages. The
number of languages supported by a driver is up
to the driver writer. Language is specified
in RFC 4646 or ISO 639-2 language code format.
@param DriverName[out] A pointer to the Unicode string to return.
This Unicode string is the name of the
driver specified by This in the language
specified by Language.
@retval EFI_SUCCESS The Unicode string for the Driver specified by
This and the language specified by Language was
returned in DriverName.
@retval EFI_INVALID_PAVIRTUALETER Language is NULL.
@retval EFI_INVALID_PAVIRTUALETER DriverName is NULL.
@retval EFI_UNSUPPORTED The driver specified by This does not support
the language specified by Language.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardComponentNameGetDriverName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName
);
/**
Retrieves a Unicode string that is the user readable name of the controller
that is being managed by a driver.
This function retrieves the user readable name of the controller specified by
ControllerHandle and ChildHandle in the form of a Unicode string. If the
driver specified by This has a user readable name in the language specified by
Language, then a pointer to the controller name is returned in ControllerName,
and EFI_SUCCESS is returned. If the driver specified by This is not currently
managing the controller specified by ControllerHandle and ChildHandle,
then EFI_UNSUPPORTED is returned. If the driver specified by This does not
support the language specified by Language, then EFI_UNSUPPORTED is returned.
@param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
EFI_COMPONENT_NAME_PROTOCOL instance.
@param ControllerHandle[in] The handle of a controller that the driver
specified by This is managing. This handle
specifies the controller whose name is to be
returned.
@param ChildHandle[in] The handle of the child controller to retrieve
the name of. This is an optional parameter that
may be NULL. It will be NULL for device
drivers. It will also be NULL for a bus drivers
that wish to retrieve the name of the bus
controller. It will not be NULL for a bus
driver that wishes to retrieve the name of a
child controller.
@param Language[in] A pointer to a Null-terminated ASCII string
array indicating the language. This is the
language of the driver name that the caller is
requesting, and it must match one of the
languages specified in SupportedLanguages. The
number of languages supported by a driver is up
to the driver writer. Language is specified in
RFC 4646 or ISO 639-2 language code format.
@param ControllerName[out] A pointer to the Unicode string to return.
This Unicode string is the name of the
controller specified by ControllerHandle and
ChildHandle in the language specified by
Language from the point of view of the driver
specified by This.
@retval EFI_SUCCESS The Unicode string for the user readable name in
the language specified by Language for the
driver specified by This was returned in
DriverName.
@retval EFI_INVALID_PAVIRTUALETER ControllerHandle is NULL.
@retval EFI_INVALID_PAVIRTUALETER ChildHandle is not NULL and it is not a valid
EFI_HANDLE.
@retval EFI_INVALID_PAVIRTUALETER Language is NULL.
@retval EFI_INVALID_PAVIRTUALETER ControllerName is NULL.
@retval EFI_UNSUPPORTED The driver specified by This is not currently
managing the controller specified by
ControllerHandle and ChildHandle.
@retval EFI_UNSUPPORTED The driver specified by This does not support
the language specified by Language.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardComponentNameGetControllerName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
);
//
// Simple Text Input Protocol functions
//
/**
Reset the Keyboard and do BAT test for it, if (ExtendedVerification == TRUE) then do some extra keyboard validations.
@param This Pointer of simple text Protocol.
@param ExtendedVerification Whether perform the extra validation of keyboard. True: perform; FALSE: skip.
@retval EFI_SUCCESS The command byte is written successfully.
@retval EFI_DEVICE_ERROR Errors occurred during resetting keyboard.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardReset (
IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
/**
Reset the input device and optionaly run diagnostics
@param This Protocol instance pointer.
@param ExtendedVerification Driver may perform diagnostics on reset.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
not be reset.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardResetEx (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
/**
Set certain state for the input device.
@param This Protocol instance pointer.
@param KeyToggleState A pointer to the EFI_KEY_TOGGLE_STATE to set the
state for the input device.
@retval EFI_SUCCESS The device state was set successfully.
@retval EFI_DEVICE_ERROR The device is not functioning correctly and could
not have the setting adjusted.
@retval EFI_UNSUPPORTED The device does not have the ability to set its state.
@retval EFI_INVALID_PAVIRTUALETER KeyToggleState is NULL.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardSetState (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN EFI_KEY_TOGGLE_STATE *KeyToggleState
);
/**
Register a notification function for a particular keystroke for the input device.
@param This Protocol instance pointer.
@param KeyData A pointer to a buffer that is filled in with the keystroke
information data for the key that was pressed.
@param KeyNotificationFunction Points to the function to be called when the key
sequence is typed specified by KeyData.
@param NotifyHandle Points to the unique handle assigned to the registered notification.
@retval EFI_SUCCESS The notification function was registered successfully.
@retval EFI_OUT_OF_RESOURCES Unable to allocate resources for necesssary data structures.
@retval EFI_INVALID_PAVIRTUALETER KeyData or NotifyHandle is NULL.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardRegisterKeyNotify (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN EFI_KEY_DATA *KeyData,
IN EFI_KEY_NOTIFY_FUNCTION KeyNotificationFunction,
OUT VOID **NotifyHandle
);
/**
Remove a registered notification function from a particular keystroke.
@param This Protocol instance pointer.
@param NotificationHandle The handle of the notification function being unregistered.
@retval EFI_SUCCESS The notification function was unregistered successfully.
@retval EFI_INVALID_PAVIRTUALETER The NotificationHandle is invalid.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardUnregisterKeyNotify (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN VOID *NotificationHandle
);
//
// Private worker functions
//
/**
Free keyboard notify list.
@param ListHead The list head
@retval EFI_SUCCESS Free the notify list successfully
@retval EFI_INVALID_PAVIRTUALETER ListHead is invalid.
**/
EFI_STATUS
VirtualKeyboardFreeNotifyList (
IN OUT LIST_ENTRY *ListHead
);
/**
Check if key is registered.
@param RegsiteredData A pointer to a buffer that is filled in with the keystroke
state data for the key that was registered.
@param InputData A pointer to a buffer that is filled in with the keystroke
state data for the key that was pressed.
@retval TRUE Key be pressed matches a registered key.
@retval FLASE Match failed.
**/
BOOLEAN
IsKeyRegistered (
IN EFI_KEY_DATA *RegsiteredData,
IN EFI_KEY_DATA *InputData
);
/**
Waiting on the keyboard event, if there's any key pressed by the user, signal the event
@param Event The event that be siganlled when any key has been stroked.
@param Context Pointer of the protocol EFI_SIMPLE_TEXT_INPUT_PROTOCOL.
**/
VOID
EFIAPI
VirtualKeyboardWaitForKey (
IN EFI_EVENT Event,
IN VOID *Context
);
/**
Waiting on the keyboard event, if there's any key pressed by the user, signal the event
@param Event The event that be siganlled when any key has been stroked.
@param Context Pointer of the protocol EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
**/
VOID
EFIAPI
VirtualKeyboardWaitForKeyEx (
IN EFI_EVENT Event,
IN VOID *Context
);
/**
Timer event handler: read a series of key stroke from 8042
and put them into memory key buffer.
It is registered as running under TPL_NOTIFY
@param Event The timer event
@param Context A VIRTUAL_KEYBOARD_DEV pointer
**/
VOID
EFIAPI
VirtualKeyboardTimerHandler (
IN EFI_EVENT Event,
IN VOID *Context
);
/**
Process key notify.
@param Event Indicates the event that invoke this function.
@param Context Indicates the calling context.
**/
VOID
EFIAPI
KeyNotifyProcessHandler (
IN EFI_EVENT Event,
IN VOID *Context
);
/**
Read out the scan code of the key that has just been stroked.
@param This Pointer of simple text Protocol.
@param Key Pointer for store the key that read out.
@retval EFI_SUCCESS The key is read out successfully.
@retval other The key reading failed.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardReadKeyStroke (
IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This,
OUT EFI_INPUT_KEY *Key
);
/**
Reads the next keystroke from the input device. The WaitForKey Event can
be used to test for existance of a keystroke via WaitForEvent () call.
@param This Protocol instance pointer.
@param KeyData A pointer to a buffer that is filled in with the keystroke
state data for the key that was pressed.
@retval EFI_SUCCESS The keystroke information was returned.
@retval EFI_NOT_READY There was no keystroke data availiable.
@retval EFI_DEVICE_ERROR The keystroke information was not returned due to
hardware errors.
@retval EFI_INVALID_PAVIRTUALETER KeyData is NULL.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardReadKeyStrokeEx (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
OUT EFI_KEY_DATA *KeyData
);
#endif /* _VIRTUAL_KEYBOARD_H_ */