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audk/EmbeddedPkg/Drivers/VirtualKeyboardDxe/VirtualKeyboard.c

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/** @file
VirtualKeyboard driver
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2018, Linaro Ltd. All rights reserved.<BR>
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.
**/
#include "VirtualKeyboard.h"
//
// RAM Keyboard Driver Binding Protocol Instance
//
EFI_DRIVER_BINDING_PROTOCOL gVirtualKeyboardDriverBinding = {
VirtualKeyboardDriverBindingSupported,
VirtualKeyboardDriverBindingStart,
VirtualKeyboardDriverBindingStop,
0x10,
NULL,
NULL
};
//
// EFI 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
)
{
EFI_STATUS Status;
PLATFORM_VIRTUAL_KBD_PROTOCOL *PlatformVirtual;
Status = gBS->OpenProtocol (
Controller,
&gPlatformVirtualKeyboardProtocolGuid,
(VOID **) &PlatformVirtual,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
gBS->CloseProtocol (
Controller,
&gPlatformVirtualKeyboardProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
/**
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
)
{
EFI_STATUS Status;
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
PLATFORM_VIRTUAL_KBD_PROTOCOL *PlatformVirtual;
Status = gBS->OpenProtocol (
Controller,
&gPlatformVirtualKeyboardProtocolGuid,
(VOID **) &PlatformVirtual,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Allocate the private device structure
//
VirtualKeyboardPrivate = (VIRTUAL_KEYBOARD_DEV *) AllocateZeroPool (sizeof (VIRTUAL_KEYBOARD_DEV));
if (VirtualKeyboardPrivate == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
//
// Initialize the private device structure
//
VirtualKeyboardPrivate->Signature = VIRTUAL_KEYBOARD_DEV_SIGNATURE;
VirtualKeyboardPrivate->Handle = Controller;
VirtualKeyboardPrivate->PlatformVirtual = PlatformVirtual;
VirtualKeyboardPrivate->Queue.Front = 0;
VirtualKeyboardPrivate->Queue.Rear = 0;
VirtualKeyboardPrivate->QueueForNotify.Front = 0;
VirtualKeyboardPrivate->QueueForNotify.Rear = 0;
VirtualKeyboardPrivate->SimpleTextIn.Reset = VirtualKeyboardReset;
VirtualKeyboardPrivate->SimpleTextIn.ReadKeyStroke = VirtualKeyboardReadKeyStroke;
VirtualKeyboardPrivate->SimpleTextInputEx.Reset = VirtualKeyboardResetEx;
VirtualKeyboardPrivate->SimpleTextInputEx.ReadKeyStrokeEx = VirtualKeyboardReadKeyStrokeEx;
VirtualKeyboardPrivate->SimpleTextInputEx.SetState = VirtualKeyboardSetState;
VirtualKeyboardPrivate->SimpleTextInputEx.RegisterKeyNotify = VirtualKeyboardRegisterKeyNotify;
VirtualKeyboardPrivate->SimpleTextInputEx.UnregisterKeyNotify = VirtualKeyboardUnregisterKeyNotify;
InitializeListHead (&VirtualKeyboardPrivate->NotifyList);
Status = PlatformVirtual->Register ();
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Report that the keyboard is being enabled
//
REPORT_STATUS_CODE (
EFI_PROGRESS_CODE,
EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_ENABLE
);
//
// Setup the WaitForKey event
//
Status = gBS->CreateEvent (
EVT_NOTIFY_WAIT,
TPL_NOTIFY,
VirtualKeyboardWaitForKey,
&(VirtualKeyboardPrivate->SimpleTextIn),
&((VirtualKeyboardPrivate->SimpleTextIn).WaitForKey)
);
if (EFI_ERROR (Status)) {
(VirtualKeyboardPrivate->SimpleTextIn).WaitForKey = NULL;
goto Done;
}
Status = gBS->CreateEvent (
EVT_NOTIFY_WAIT,
TPL_NOTIFY,
VirtualKeyboardWaitForKeyEx,
&(VirtualKeyboardPrivate->SimpleTextInputEx),
&(VirtualKeyboardPrivate->SimpleTextInputEx.WaitForKeyEx)
);
if (EFI_ERROR (Status)) {
VirtualKeyboardPrivate->SimpleTextInputEx.WaitForKeyEx = NULL;
goto Done;
}
//
// Setup a periodic timer, used for reading keystrokes at a fixed interval
//
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
VirtualKeyboardTimerHandler,
VirtualKeyboardPrivate,
&VirtualKeyboardPrivate->TimerEvent
);
if (EFI_ERROR (Status)) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = gBS->SetTimer (
VirtualKeyboardPrivate->TimerEvent,
TimerPeriodic,
KEYBOARD_TIMER_INTERVAL
);
if (EFI_ERROR (Status)) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
KeyNotifyProcessHandler,
VirtualKeyboardPrivate,
&VirtualKeyboardPrivate->KeyNotifyProcessEvent
);
if (EFI_ERROR (Status)) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
//
// Reset the keyboard device
//
Status = VirtualKeyboardPrivate->SimpleTextInputEx.Reset (
&VirtualKeyboardPrivate->SimpleTextInputEx,
FALSE
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "[KBD]Reset Failed. Status - %r\n", Status));
goto Done;
}
//
// Install protocol interfaces for the keyboard device.
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Controller,
&gEfiSimpleTextInProtocolGuid,
&VirtualKeyboardPrivate->SimpleTextIn,
&gEfiSimpleTextInputExProtocolGuid,
&VirtualKeyboardPrivate->SimpleTextInputEx,
NULL
);
Done:
if (EFI_ERROR (Status)) {
if (VirtualKeyboardPrivate != NULL) {
if ((VirtualKeyboardPrivate->SimpleTextIn).WaitForKey != NULL) {
gBS->CloseEvent ((VirtualKeyboardPrivate->SimpleTextIn).WaitForKey);
}
if ((VirtualKeyboardPrivate->SimpleTextInputEx).WaitForKeyEx != NULL) {
gBS->CloseEvent (
(VirtualKeyboardPrivate->SimpleTextInputEx).WaitForKeyEx
);
}
if (VirtualKeyboardPrivate->KeyNotifyProcessEvent != NULL) {
gBS->CloseEvent (VirtualKeyboardPrivate->KeyNotifyProcessEvent);
}
VirtualKeyboardFreeNotifyList (&VirtualKeyboardPrivate->NotifyList);
if (VirtualKeyboardPrivate->TimerEvent != NULL) {
gBS->CloseEvent (VirtualKeyboardPrivate->TimerEvent);
}
FreePool (VirtualKeyboardPrivate);
}
}
gBS->CloseProtocol (
Controller,
&gPlatformVirtualKeyboardProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
/**
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
)
{
return EFI_SUCCESS;
}
/**
Enqueue the key.
@param Queue The queue to be enqueued.
@param KeyData The key data to be enqueued.
@retval EFI_NOT_READY The queue is full.
@retval EFI_SUCCESS Successfully enqueued the key data.
**/
EFI_STATUS
Enqueue (
IN SIMPLE_QUEUE *Queue,
IN EFI_KEY_DATA *KeyData
)
{
if ((Queue->Rear + 1) % QUEUE_MAX_COUNT == Queue->Front) {
return EFI_NOT_READY;
}
CopyMem (&Queue->Buffer[Queue->Rear], KeyData, sizeof (EFI_KEY_DATA));
Queue->Rear = (Queue->Rear + 1) % QUEUE_MAX_COUNT;
return EFI_SUCCESS;
}
/**
Dequeue the key.
@param Queue The queue to be dequeued.
@param KeyData The key data to be dequeued.
@retval EFI_NOT_READY The queue is empty.
@retval EFI_SUCCESS Successfully dequeued the key data.
**/
EFI_STATUS
Dequeue (
IN SIMPLE_QUEUE *Queue,
IN EFI_KEY_DATA *KeyData
)
{
if (Queue->Front == Queue->Rear) {
return EFI_NOT_READY;
}
CopyMem (KeyData, &Queue->Buffer[Queue->Front], sizeof (EFI_KEY_DATA));
Queue->Front = (Queue->Front + 1) % QUEUE_MAX_COUNT;
return EFI_SUCCESS;
}
/**
Check whether the queue is empty.
@param Queue The queue to be checked.
@retval EFI_NOT_READY The queue is empty.
@retval EFI_SUCCESS The queue is not empty.
**/
EFI_STATUS
CheckQueue (
IN SIMPLE_QUEUE *Queue
)
{
if (Queue->Front == Queue->Rear) {
return EFI_NOT_READY;
}
return EFI_SUCCESS;
}
/**
Check key buffer to get the key stroke status.
@param This Pointer of the protocol EFI_SIMPLE_TEXT_IN_PROTOCOL.
@retval EFI_SUCCESS A key is being pressed now.
@retval Other No key is now pressed.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardCheckForKey (
IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
VirtualKeyboardPrivate = VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
return CheckQueue (&VirtualKeyboardPrivate->Queue);
}
/**
Free keyboard notify list.
@param ListHead The list head
@retval EFI_SUCCESS Free the notify list successfully
@retval EFI_INVALID_PARAMETER ListHead is invalid.
**/
EFI_STATUS
VirtualKeyboardFreeNotifyList (
IN OUT LIST_ENTRY *ListHead
)
{
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *NotifyNode;
if (ListHead == NULL) {
return EFI_INVALID_PARAMETER;
}
while (!IsListEmpty (ListHead)) {
NotifyNode = CR (
ListHead->ForwardLink,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY,
NotifyEntry,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
);
RemoveEntryList (ListHead->ForwardLink);
gBS->FreePool (NotifyNode);
}
return EFI_SUCCESS;
}
/**
Judge whether is a registed key
@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
)
{
ASSERT (RegsiteredData != NULL && InputData != NULL);
if ((RegsiteredData->Key.ScanCode != InputData->Key.ScanCode) ||
(RegsiteredData->Key.UnicodeChar != InputData->Key.UnicodeChar)) {
return FALSE;
}
//
// Assume KeyShiftState/KeyToggleState = 0 in Registered key data means
// these state could be ignored.
//
if ((RegsiteredData->KeyState.KeyShiftState != 0) &&
(RegsiteredData->KeyState.KeyShiftState != InputData->KeyState.KeyShiftState)) {
return FALSE;
}
if ((RegsiteredData->KeyState.KeyToggleState != 0) &&
(RegsiteredData->KeyState.KeyToggleState != InputData->KeyState.KeyToggleState)) {
return FALSE;
}
return TRUE;
}
/**
Event notification function for SIMPLE_TEXT_IN.WaitForKey event
Signal the event if there is key available
@param Event the event object
@param Context waitting context
**/
VOID
EFIAPI
VirtualKeyboardWaitForKey (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// Stall 1ms to give a chance to let other driver interrupt this routine
// for their timer event.
// e.g. UI setup or Shell, other drivers which are driven by timer event
// will have a bad performance during this period,
// e.g. usb keyboard driver.
// Add a stall period can greatly increate other driver performance during
// the WaitForKey is recursivly invoked. 1ms delay will make little impact
// to the thunk keyboard driver, and user can not feel the delay at all when
// input.
//
gBS->Stall (1000);
//
// Use TimerEvent callback function to check whether there's any key pressed
//
VirtualKeyboardTimerHandler (NULL, VIRTUAL_KEYBOARD_DEV_FROM_THIS (Context));
if (!EFI_ERROR (VirtualKeyboardCheckForKey (Context))) {
gBS->SignalEvent (Event);
}
}
/**
Event notification function for SIMPLE_TEXT_INPUT_EX_PROTOCOL.WaitForKeyEx
event. Signal the event if there is key available
@param Event event object
@param Context waiting context
**/
VOID
EFIAPI
VirtualKeyboardWaitForKeyEx (
IN EFI_EVENT Event,
IN VOID *Context
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
VirtualKeyboardPrivate = TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS (Context);
VirtualKeyboardWaitForKey (Event, &VirtualKeyboardPrivate->SimpleTextIn);
}
//
// EFI Simple Text In 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
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_STATUS Status;
EFI_TPL OldTpl;
VirtualKeyboardPrivate = VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
//
// Raise TPL to avoid mouse operation impact
//
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
if (VirtualKeyboardPrivate->PlatformVirtual &&
VirtualKeyboardPrivate->PlatformVirtual->Reset) {
Status = VirtualKeyboardPrivate->PlatformVirtual->Reset ();
} else {
Status = EFI_INVALID_PARAMETER;
}
//
// resume priority of task level
//
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
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
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_STATUS Status;
EFI_TPL OldTpl;
VirtualKeyboardPrivate = TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
Status = VirtualKeyboardPrivate->SimpleTextIn.Reset (
&VirtualKeyboardPrivate->SimpleTextIn,
ExtendedVerification
);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
gBS->RestoreTPL (OldTpl);
return EFI_SUCCESS;
}
/**
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 VirtualKeyboardPrivate Virtualkeyboard driver private structure.
@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_PARAMETER KeyData is NULL.
**/
EFI_STATUS
KeyboardReadKeyStrokeWorker (
IN VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate,
OUT EFI_KEY_DATA *KeyData
)
{
EFI_STATUS Status;
EFI_TPL OldTpl;
if (KeyData == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Use TimerEvent callback function to check whether there's any key pressed
//
//
// Stall 1ms to give a chance to let other driver interrupt this routine for
// their timer event.
// e.g. OS loader, other drivers which are driven by timer event will have a
// bad performance during this period,
// e.g. usb keyboard driver.
// Add a stall period can greatly increate other driver performance during
// the WaitForKey is recursivly invoked. 1ms delay will make little impact
// to the thunk keyboard driver, and user can not feel the delay at all when
// input.
//
gBS->Stall (1000);
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
VirtualKeyboardTimerHandler (NULL, VirtualKeyboardPrivate);
//
// If there's no key, just return
//
Status = CheckQueue (&VirtualKeyboardPrivate->Queue);
if (EFI_ERROR (Status)) {
gBS->RestoreTPL (OldTpl);
return EFI_NOT_READY;
}
Status = Dequeue (&VirtualKeyboardPrivate->Queue, KeyData);
gBS->RestoreTPL (OldTpl);
return EFI_SUCCESS;
}
/**
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
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_STATUS Status;
EFI_KEY_DATA KeyData;
VirtualKeyboardPrivate = VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
Status = KeyboardReadKeyStrokeWorker (VirtualKeyboardPrivate, &KeyData);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Convert the Ctrl+[a-z] to Ctrl+[1-26]
//
if ((KeyData.KeyState.KeyShiftState & (EFI_LEFT_CONTROL_PRESSED | EFI_RIGHT_CONTROL_PRESSED)) != 0) {
if (KeyData.Key.UnicodeChar >= L'a' &&
KeyData.Key.UnicodeChar <= L'z') {
KeyData.Key.UnicodeChar = (CHAR16) (KeyData.Key.UnicodeChar - L'a' + 1);
} else if (KeyData.Key.UnicodeChar >= L'A' &&
KeyData.Key.UnicodeChar <= L'Z') {
KeyData.Key.UnicodeChar = (CHAR16) (KeyData.Key.UnicodeChar - L'A' + 1);
}
}
CopyMem (Key, &KeyData.Key, sizeof (EFI_INPUT_KEY));
return EFI_SUCCESS;
}
/**
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_PARAMETER KeyData is NULL.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardReadKeyStrokeEx (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
OUT EFI_KEY_DATA *KeyData
)
{
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
if (KeyData == NULL) {
return EFI_INVALID_PARAMETER;
}
VirtualKeyboardPrivate = TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
return KeyboardReadKeyStrokeWorker (VirtualKeyboardPrivate, KeyData);
}
/**
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_PARAMETER KeyToggleState is NULL.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardSetState (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN EFI_KEY_TOGGLE_STATE *KeyToggleState
)
{
if (KeyToggleState == NULL) {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
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_PARAMETER 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
)
{
EFI_STATUS Status;
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_TPL OldTpl;
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *NewNotify;
LIST_ENTRY *Link;
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *CurrentNotify;
if (KeyData == NULL ||
NotifyHandle == NULL ||
KeyNotificationFunction == NULL) {
return EFI_INVALID_PARAMETER;
}
VirtualKeyboardPrivate = TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
//
// Enter critical section
//
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
//
// Return EFI_SUCCESS if the (KeyData, NotificationFunction) is already
// registered.
//
for (Link = VirtualKeyboardPrivate->NotifyList.ForwardLink;
Link != &VirtualKeyboardPrivate->NotifyList;
Link = Link->ForwardLink) {
CurrentNotify = CR (
Link,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY,
NotifyEntry,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
);
if (IsKeyRegistered (&CurrentNotify->KeyData, KeyData)) {
if (CurrentNotify->KeyNotificationFn == KeyNotificationFunction) {
*NotifyHandle = CurrentNotify;
Status = EFI_SUCCESS;
goto Exit;
}
}
}
//
// Allocate resource to save the notification function
//
NewNotify = (VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *) AllocateZeroPool (sizeof (VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY));
if (NewNotify == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
NewNotify->Signature = VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE;
NewNotify->KeyNotificationFn = KeyNotificationFunction;
CopyMem (&NewNotify->KeyData, KeyData, sizeof (EFI_KEY_DATA));
InsertTailList (&VirtualKeyboardPrivate->NotifyList, &NewNotify->NotifyEntry);
*NotifyHandle = NewNotify;
Status = EFI_SUCCESS;
Exit:
//
// Leave critical section and return
//
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
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_PARAMETER The NotificationHandle is invalid.
**/
EFI_STATUS
EFIAPI
VirtualKeyboardUnregisterKeyNotify (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
IN VOID *NotificationHandle
)
{
EFI_STATUS Status;
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_TPL OldTpl;
LIST_ENTRY *Link;
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *CurrentNotify;
//
// Check incoming notification handle
//
if (NotificationHandle == NULL) {
return EFI_INVALID_PARAMETER;
}
if (((VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *) NotificationHandle)->Signature !=
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
VirtualKeyboardPrivate = TEXT_INPUT_EX_VIRTUAL_KEYBOARD_DEV_FROM_THIS (This);
//
// Enter critical section
//
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
for (Link = VirtualKeyboardPrivate->NotifyList.ForwardLink;
Link != &VirtualKeyboardPrivate->NotifyList;
Link = Link->ForwardLink) {
CurrentNotify = CR (
Link,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY,
NotifyEntry,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
);
if (CurrentNotify == NotificationHandle) {
//
// Remove the notification function from NotifyList and free resources
//
RemoveEntryList (&CurrentNotify->NotifyEntry);
Status = EFI_SUCCESS;
goto Exit;
}
}
//
// Can not find the specified Notification Handle
//
Status = EFI_INVALID_PARAMETER;
Exit:
//
// Leave critical section and return
//
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Timer event handler: read a series of scancodes from 8042
and put them into memory scancode buffer.
it read as much scancodes to either fill
the memory buffer or empty the keyboard buffer.
It is registered as running under TPL_NOTIFY
@param Event The timer event
@param Context A KEYBOARD_CONSOLE_IN_DEV pointer
**/
VOID
EFIAPI
VirtualKeyboardTimerHandler (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_TPL OldTpl;
LIST_ENTRY *Link;
EFI_KEY_DATA KeyData;
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *CurrentNotify;
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
VIRTUAL_KBD_KEY VirtualKey;
VirtualKeyboardPrivate = Context;
//
// Enter critical section
//
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
if (VirtualKeyboardPrivate->PlatformVirtual &&
VirtualKeyboardPrivate->PlatformVirtual->Query) {
if (VirtualKeyboardPrivate->PlatformVirtual->Query (&VirtualKey) ==
FALSE) {
goto Exit;
}
// Found key
KeyData.Key.ScanCode = VirtualKey.Key.ScanCode;
KeyData.Key.UnicodeChar = VirtualKey.Key.UnicodeChar;
KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID;
KeyData.KeyState.KeyToggleState = EFI_TOGGLE_STATE_VALID;
if (VirtualKeyboardPrivate->PlatformVirtual->Clear) {
VirtualKeyboardPrivate->PlatformVirtual->Clear (&VirtualKey);
}
} else {
goto Exit;
}
//
// Signal KeyNotify process event if this key pressed matches any key registered.
//
for (Link = VirtualKeyboardPrivate->NotifyList.ForwardLink;
Link != &VirtualKeyboardPrivate->NotifyList;
Link = Link->ForwardLink) {
CurrentNotify = CR (
Link,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY,
NotifyEntry,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
);
if (IsKeyRegistered (&CurrentNotify->KeyData, &KeyData)) {
//
// The key notification function needs to run at TPL_CALLBACK
// while current TPL is TPL_NOTIFY. It will be invoked in
// KeyNotifyProcessHandler() which runs at TPL_CALLBACK.
//
Enqueue (&VirtualKeyboardPrivate->QueueForNotify, &KeyData);
gBS->SignalEvent (VirtualKeyboardPrivate->KeyNotifyProcessEvent);
break;
}
}
Enqueue (&VirtualKeyboardPrivate->Queue, &KeyData);
Exit:
//
// Leave critical section and return
//
gBS->RestoreTPL (OldTpl);
}
/**
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
)
{
EFI_STATUS Status;
VIRTUAL_KEYBOARD_DEV *VirtualKeyboardPrivate;
EFI_KEY_DATA KeyData;
LIST_ENTRY *Link;
LIST_ENTRY *NotifyList;
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY *CurrentNotify;
EFI_TPL OldTpl;
VirtualKeyboardPrivate = (VIRTUAL_KEYBOARD_DEV *) Context;
//
// Invoke notification functions.
//
NotifyList = &VirtualKeyboardPrivate->NotifyList;
while (TRUE) {
//
// Enter critical section
//
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
Status = Dequeue (&VirtualKeyboardPrivate->QueueForNotify, &KeyData);
//
// Leave critical section
//
gBS->RestoreTPL (OldTpl);
if (EFI_ERROR (Status)) {
break;
}
for (Link = GetFirstNode (NotifyList);
!IsNull (NotifyList, Link);
Link = GetNextNode (NotifyList, Link)) {
CurrentNotify = CR (Link,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY,
NotifyEntry,
VIRTUAL_KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
);
if (IsKeyRegistered (&CurrentNotify->KeyData, &KeyData)) {
CurrentNotify->KeyNotificationFn (&KeyData);
}
}
}
}
/**
The user Entry Point for module VirtualKeyboard. The user code starts with
this function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeVirtualKeyboard(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gVirtualKeyboardDriverBinding,
ImageHandle,
&gVirtualKeyboardComponentName,
&gVirtualKeyboardComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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