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Fix the USB keyboard driver to call hotkey callback even no one is calling ReadKeyStroke

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11563 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
niruiyu
2011-04-19 06:52:20 +00:00
parent f0368006b0
commit c1fd2767c1
4 changed files with 317 additions and 414 deletions
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364
MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c
View File

@@ -1,7 +1,7 @@
/** @file
Helper functions for USB Keyboard Driver.
Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2004 - 2011, Intel Corporation. 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
@@ -310,7 +310,6 @@ UINT8 ModifierValueToEfiScanCodeConvertionTable[] = {
@retval Others Failure to install default keyboard layout.
**/
EFI_STATUS
EFIAPI
InstallDefaultKeyboardLayout (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
@@ -363,7 +362,6 @@ InstallDefaultKeyboardLayout (
**/
BOOLEAN
EFIAPI
IsUSBKeyboard (
IN EFI_USB_IO_PROTOCOL *UsbIo
)
@@ -401,7 +399,6 @@ IsUSBKeyboard (
**/
EFI_HII_KEYBOARD_LAYOUT *
EFIAPI
GetCurrentKeyboardLayout (
VOID
)
@@ -464,7 +461,6 @@ GetCurrentKeyboardLayout (
**/
EFI_KEY_DESCRIPTOR *
EFIAPI
GetKeyDescriptor (
IN USB_KB_DEV *UsbKeyboardDevice,
IN UINT8 KeyCode
@@ -502,7 +498,6 @@ GetKeyDescriptor (
**/
USB_NS_KEY *
EFIAPI
FindUsbNsKey (
IN USB_KB_DEV *UsbKeyboardDevice,
IN EFI_KEY_DESCRIPTOR *KeyDescriptor
@@ -543,7 +538,6 @@ FindUsbNsKey (
**/
EFI_KEY_DESCRIPTOR *
EFIAPI
FindPhysicalKey (
IN USB_NS_KEY *UsbNsKey,
IN EFI_KEY_DESCRIPTOR *KeyDescriptor
@@ -646,7 +640,7 @@ SetKeyboardLayoutEvent (
//
KeyCount = 0;
NsKey = KeyDescriptor + 1;
for (Index2 = Index + 1; Index2 < KeyboardLayout->DescriptorCount; Index2++) {
for (Index2 = (UINT8) Index + 1; Index2 < KeyboardLayout->DescriptorCount; Index2++) {
CopyMem (&TempKey, NsKey, sizeof (EFI_KEY_DESCRIPTOR));
if (TempKey.Modifier == EFI_NS_KEY_DEPENDENCY_MODIFIER) {
KeyCount++;
@@ -691,7 +685,6 @@ SetKeyboardLayoutEvent (
**/
VOID
EFIAPI
ReleaseKeyboardLayoutResources (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
@@ -730,7 +723,6 @@ ReleaseKeyboardLayoutResources (
**/
EFI_STATUS
EFIAPI
InitKeyboardLayout (
OUT USB_KB_DEV *UsbKeyboardDevice
)
@@ -797,7 +789,6 @@ InitKeyboardLayout (
**/
EFI_STATUS
EFIAPI
InitUSBKeyboard (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
@@ -815,7 +806,8 @@ InitUSBKeyboard (
UsbKeyboardDevice->DevicePath
);
InitUSBKeyBuffer (&(UsbKeyboardDevice->KeyboardBuffer));
InitQueue (&UsbKeyboardDevice->UsbKeyQueue, sizeof (USB_KEY));
InitQueue (&UsbKeyboardDevice->EfiKeyQueue, sizeof (EFI_KEY_DATA));
//
// Use the config out of the descriptor
@@ -986,12 +978,10 @@ KeyboardHandler (
UINT8 CurModifierMap;
UINT8 OldModifierMap;
UINT8 Mask;
UINT8 Index;
UINTN Index;
UINT8 Index2;
BOOLEAN Down;
BOOLEAN KeyRelease;
BOOLEAN KeyPress;
UINT8 SavedTail;
USB_KEY UsbKey;
UINT8 NewRepeatKey;
UINT32 UsbStatus;
@@ -1119,8 +1109,9 @@ KeyboardHandler (
// otherwise it is a non-zero value.
// Insert the changed modifier key into key buffer.
//
Down = (BOOLEAN) ((CurModifierMap & Mask) != 0);
InsertKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), (UINT8) (0xe0 + Index), Down);
UsbKey.KeyCode = (UINT8) (0xe0 + Index);
UsbKey.Down = (BOOLEAN) ((CurModifierMap & Mask) != 0);
Enqueue (&UsbKeyboardDevice->UsbKeyQueue, &UsbKey, sizeof (UsbKey));
}
}
@@ -1152,11 +1143,9 @@ KeyboardHandler (
}
if (KeyRelease) {
InsertKeyCode (
&(UsbKeyboardDevice->KeyboardBuffer),
OldKeyCodeBuffer[Index],
FALSE
);
UsbKey.KeyCode = OldKeyCodeBuffer[Index];
UsbKey.Down = FALSE;
Enqueue (&UsbKeyboardDevice->UsbKeyQueue, &UsbKey, sizeof (UsbKey));
//
// The original repeat key is released.
//
@@ -1204,7 +1193,9 @@ KeyboardHandler (
}
if (KeyPress) {
InsertKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), CurKeyCodeBuffer[Index], TRUE);
UsbKey.KeyCode = CurKeyCodeBuffer[Index];
UsbKey.Down = TRUE;
Enqueue (&UsbKeyboardDevice->UsbKeyQueue, &UsbKey, sizeof (UsbKey));
//
// Handle repeat key
@@ -1234,72 +1225,6 @@ KeyboardHandler (
UsbKeyboardDevice->LastKeyCodeArray[Index] = CurKeyCodeBuffer[Index];
}
//
// Pre-process KeyboardBuffer to check if Ctrl + Alt + Del is pressed.
//
SavedTail = UsbKeyboardDevice->KeyboardBuffer.BufferTail;
Index = UsbKeyboardDevice->KeyboardBuffer.BufferHead;
while (Index != SavedTail) {
RemoveKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), &UsbKey);
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, UsbKey.KeyCode);
ASSERT (KeyDescriptor != NULL);
switch (KeyDescriptor->Modifier) {
case EFI_LEFT_CONTROL_MODIFIER:
case EFI_RIGHT_CONTROL_MODIFIER:
if (UsbKey.Down) {
UsbKeyboardDevice->CtrlOn = TRUE;
} else {
UsbKeyboardDevice->CtrlOn = FALSE;
}
break;
case EFI_LEFT_ALT_MODIFIER:
case EFI_RIGHT_ALT_MODIFIER:
if (UsbKey.Down) {
UsbKeyboardDevice->AltOn = TRUE;
} else {
UsbKeyboardDevice->AltOn = FALSE;
}
break;
case EFI_ALT_GR_MODIFIER:
if (UsbKey.Down) {
UsbKeyboardDevice->AltGrOn = TRUE;
} else {
UsbKeyboardDevice->AltGrOn = FALSE;
}
break;
//
// For Del Key, check if Ctrl + Alt + Del occurs for reset.
//
case EFI_DELETE_MODIFIER:
if (UsbKey.Down) {
if ((UsbKeyboardDevice->CtrlOn) && (UsbKeyboardDevice->AltOn)) {
gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
}
break;
default:
break;
}
//
// Insert the key back to the buffer,
// so the key sequence will not be destroyed.
//
InsertKeyCode (
&(UsbKeyboardDevice->KeyboardBuffer),
UsbKey.KeyCode,
UsbKey.Down
);
Index = UsbKeyboardDevice->KeyboardBuffer.BufferHead;
}
//
// If there is new key pressed, update the RepeatKey value, and set the
// timer to repeate delay timer
@@ -1336,7 +1261,6 @@ KeyboardHandler (
**/
EFI_STATUS
EFIAPI
USBParseKey (
IN OUT USB_KB_DEV *UsbKeyboardDevice,
OUT UINT8 *KeyCode
@@ -1347,11 +1271,11 @@ USBParseKey (
*KeyCode = 0;
while (!IsUSBKeyboardBufferEmpty (&UsbKeyboardDevice->KeyboardBuffer)) {
while (!IsQueueEmpty (&UsbKeyboardDevice->UsbKeyQueue)) {
//
// Pops one raw data off.
//
RemoveKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), &UsbKey);
Dequeue (&UsbKeyboardDevice->UsbKeyQueue, &UsbKey, sizeof (UsbKey));
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, UsbKey.KeyCode);
ASSERT (KeyDescriptor != NULL);
@@ -1589,7 +1513,7 @@ USBParseKey (
@param UsbKeyboardDevice The USB_KB_DEV instance.
@param KeyCode Indicates the key code that will be interpreted.
@param Key A pointer to a buffer that is filled in with
@param KeyData A pointer to a buffer that is filled in with
the keystroke information for the key that
was pressed.
@@ -1601,14 +1525,16 @@ USBParseKey (
**/
EFI_STATUS
EFIAPI
UsbKeyCodeToEfiInputKey (
IN USB_KB_DEV *UsbKeyboardDevice,
IN UINT8 KeyCode,
OUT EFI_INPUT_KEY *Key
IN USB_KB_DEV *UsbKeyboardDevice,
IN UINT8 KeyCode,
OUT EFI_KEY_DATA *KeyData
)
{
EFI_KEY_DESCRIPTOR *KeyDescriptor;
EFI_KEY_DESCRIPTOR *KeyDescriptor;
LIST_ENTRY *Link;
LIST_ENTRY *NotifyList;
KEYBOARD_CONSOLE_IN_EX_NOTIFY *CurrentNotify;
//
// KeyCode must in the range of 0x4 to 0x65
@@ -1647,12 +1573,12 @@ UsbKeyCodeToEfiInputKey (
return EFI_DEVICE_ERROR;
}
Key->ScanCode = ModifierValueToEfiScanCodeConvertionTable[KeyDescriptor->Modifier];
Key->UnicodeChar = KeyDescriptor->Unicode;
KeyData->Key.ScanCode = ModifierValueToEfiScanCodeConvertionTable[KeyDescriptor->Modifier];
KeyData->Key.UnicodeChar = KeyDescriptor->Unicode;
if ((KeyDescriptor->AffectedAttribute & EFI_AFFECTED_BY_STANDARD_SHIFT)!= 0) {
if (UsbKeyboardDevice->ShiftOn) {
Key->UnicodeChar = KeyDescriptor->ShiftedUnicode;
KeyData->Key.UnicodeChar = KeyDescriptor->ShiftedUnicode;
//
// Need not return associated shift state if a class of printable characters that
@@ -1664,42 +1590,30 @@ UsbKeyCodeToEfiInputKey (
}
if (UsbKeyboardDevice->AltGrOn) {
Key->UnicodeChar = KeyDescriptor->ShiftedAltGrUnicode;
KeyData->Key.UnicodeChar = KeyDescriptor->ShiftedAltGrUnicode;
}
} else {
//
// Shift off
//
Key->UnicodeChar = KeyDescriptor->Unicode;
KeyData->Key.UnicodeChar = KeyDescriptor->Unicode;
if (UsbKeyboardDevice->AltGrOn) {
Key->UnicodeChar = KeyDescriptor->AltGrUnicode;
KeyData->Key.UnicodeChar = KeyDescriptor->AltGrUnicode;
}
}
}
if ((KeyDescriptor->AffectedAttribute & EFI_AFFECTED_BY_CAPS_LOCK) != 0) {
if (UsbKeyboardDevice->CapsOn) {
if (Key->UnicodeChar == KeyDescriptor->Unicode) {
Key->UnicodeChar = KeyDescriptor->ShiftedUnicode;
} else if (Key->UnicodeChar == KeyDescriptor->ShiftedUnicode) {
Key->UnicodeChar = KeyDescriptor->Unicode;
if (KeyData->Key.UnicodeChar == KeyDescriptor->Unicode) {
KeyData->Key.UnicodeChar = KeyDescriptor->ShiftedUnicode;
} else if (KeyData->Key.UnicodeChar == KeyDescriptor->ShiftedUnicode) {
KeyData->Key.UnicodeChar = KeyDescriptor->Unicode;
}
}
}
//
// Translate the CTRL-Alpha characters to their corresponding control value
// (ctrl-a = 0x0001 through ctrl-Z = 0x001A)
//
if (UsbKeyboardDevice->CtrlOn) {
if (Key->UnicodeChar >= 'a' && Key->UnicodeChar <= 'z') {
Key->UnicodeChar = (UINT8) (Key->UnicodeChar - 'a' + 1);
} else if (Key->UnicodeChar >= 'A' && Key->UnicodeChar <= 'Z') {
Key->UnicodeChar = (UINT8) (Key->UnicodeChar - 'A' + 1);
}
}
if ((KeyDescriptor->AffectedAttribute & EFI_AFFECTED_BY_NUM_LOCK) != 0) {
//
// For key affected by NumLock, if NumLock is on and Shift is not pressed, then it means
@@ -1707,205 +1621,247 @@ UsbKeyCodeToEfiInputKey (
// Otherwise, it means control key, so preserve the EFI Scan Code and clear the unicode keycode.
//
if ((UsbKeyboardDevice->NumLockOn) && (!(UsbKeyboardDevice->ShiftOn))) {
Key->ScanCode = SCAN_NULL;
KeyData->Key.ScanCode = SCAN_NULL;
} else {
Key->UnicodeChar = 0x00;
KeyData->Key.UnicodeChar = 0x00;
}
}
//
// Translate Unicode 0x1B (ESC) to EFI Scan Code
//
if (Key->UnicodeChar == 0x1B && Key->ScanCode == SCAN_NULL) {
Key->ScanCode = SCAN_ESC;
Key->UnicodeChar = 0x00;
if (KeyData->Key.UnicodeChar == 0x1B && KeyData->Key.ScanCode == SCAN_NULL) {
KeyData->Key.ScanCode = SCAN_ESC;
KeyData->Key.UnicodeChar = 0x00;
}
//
// Not valid for key without both unicode key code and EFI Scan Code.
//
if (Key->UnicodeChar == 0 && Key->ScanCode == SCAN_NULL) {
if (KeyData->Key.UnicodeChar == 0 && KeyData->Key.ScanCode == SCAN_NULL) {
return EFI_NOT_READY;
}
//
// Save Shift/Toggle state
//
KeyData->KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID;
KeyData->KeyState.KeyToggleState = EFI_TOGGLE_STATE_VALID;
if (UsbKeyboardDevice->LeftCtrlOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_CONTROL_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_LEFT_CONTROL_PRESSED;
}
if (UsbKeyboardDevice->RightCtrlOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_CONTROL_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_RIGHT_CONTROL_PRESSED;
}
if (UsbKeyboardDevice->LeftAltOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_ALT_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_LEFT_ALT_PRESSED;
}
if (UsbKeyboardDevice->RightAltOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_ALT_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_RIGHT_ALT_PRESSED;
}
if (UsbKeyboardDevice->LeftShiftOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_SHIFT_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_LEFT_SHIFT_PRESSED;
}
if (UsbKeyboardDevice->RightShiftOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_SHIFT_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_RIGHT_SHIFT_PRESSED;
}
if (UsbKeyboardDevice->LeftLogoOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_LOGO_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_LEFT_LOGO_PRESSED;
}
if (UsbKeyboardDevice->RightLogoOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_LOGO_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_RIGHT_LOGO_PRESSED;
}
if (UsbKeyboardDevice->MenuKeyOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_MENU_KEY_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_MENU_KEY_PRESSED;
}
if (UsbKeyboardDevice->SysReqOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_SYS_REQ_PRESSED;
KeyData->KeyState.KeyShiftState |= EFI_SYS_REQ_PRESSED;
}
if (UsbKeyboardDevice->ScrollOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_SCROLL_LOCK_ACTIVE;
KeyData->KeyState.KeyToggleState |= EFI_SCROLL_LOCK_ACTIVE;
}
if (UsbKeyboardDevice->NumLockOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_NUM_LOCK_ACTIVE;
KeyData->KeyState.KeyToggleState |= EFI_NUM_LOCK_ACTIVE;
}
if (UsbKeyboardDevice->CapsOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_CAPS_LOCK_ACTIVE;
KeyData->KeyState.KeyToggleState |= EFI_CAPS_LOCK_ACTIVE;
}
//
// Invoke notification functions if the key is registered.
//
NotifyList = &UsbKeyboardDevice->NotifyList;
for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList, Link); Link = GetNextNode (NotifyList, Link)) {
CurrentNotify = CR (Link, KEYBOARD_CONSOLE_IN_EX_NOTIFY, NotifyEntry, USB_KB_CONSOLE_IN_EX_NOTIFY_SIGNATURE);
if (IsKeyRegistered (&CurrentNotify->KeyData, KeyData)) {
CurrentNotify->KeyNotificationFn (KeyData);
}
}
//
// Translate the CTRL-Alpha characters to their corresponding control value
// (ctrl-a = 0x0001 through ctrl-Z = 0x001A)
//
if (UsbKeyboardDevice->CtrlOn) {
if (KeyData->Key.UnicodeChar >= 'a' && KeyData->Key.UnicodeChar <= 'z') {
KeyData->Key.UnicodeChar = (UINT8) (KeyData->Key.UnicodeChar - 'a' + 1);
} else if (KeyData->Key.UnicodeChar >= 'A' && KeyData->Key.UnicodeChar <= 'Z') {
KeyData->Key.UnicodeChar = (UINT8) (KeyData->Key.UnicodeChar - 'A' + 1);
}
}
return EFI_SUCCESS;
}
/**
Resets USB keyboard buffer.
Create the queue.
@param KeyboardBuffer Points to the USB keyboard buffer.
@param Queue Points to the queue.
@param ItemSize Size of the single item.
**/
VOID
EFIAPI
InitUSBKeyBuffer (
OUT USB_KB_BUFFER *KeyboardBuffer
InitQueue (
IN OUT USB_SIMPLE_QUEUE *Queue,
IN UINTN ItemSize
)
{
ZeroMem (KeyboardBuffer, sizeof (USB_KB_BUFFER));
UINTN Index;
KeyboardBuffer->BufferHead = KeyboardBuffer->BufferTail;
Queue->ItemSize = ItemSize;
Queue->Head = 0;
Queue->Tail = 0;
if (Queue->Buffer[0] != NULL) {
FreePool (Queue->Buffer[0]);
}
Queue->Buffer[0] = AllocatePool (sizeof (Queue->Buffer) / sizeof (Queue->Buffer[0]) * ItemSize);
ASSERT (Queue->Buffer[0] != NULL);
for (Index = 1; Index < sizeof (Queue->Buffer) / sizeof (Queue->Buffer[0]); Index++) {
Queue->Buffer[Index] = ((UINT8 *) Queue->Buffer[Index - 1]) + ItemSize;
}
}
/**
Destroy the queue
@param Queue Points to the queue.
**/
VOID
DestroyQueue (
IN OUT USB_SIMPLE_QUEUE *Queue
)
{
FreePool (Queue->Buffer[0]);
}
/**
Check whether USB keyboard buffer is empty.
Check whether the queue is empty.
@param KeyboardBuffer USB keyboard buffer
@param Queue Points to the queue.
@retval TRUE Keyboard buffer is empty.
@retval FALSE Keyboard buffer is not empty.
@retval TRUE Queue is empty.
@retval FALSE Queue is not empty.
**/
BOOLEAN
EFIAPI
IsUSBKeyboardBufferEmpty (
IN USB_KB_BUFFER *KeyboardBuffer
IsQueueEmpty (
IN USB_SIMPLE_QUEUE *Queue
)
{
//
// Meet FIFO empty condition
//
return (BOOLEAN) (KeyboardBuffer->BufferHead == KeyboardBuffer->BufferTail);
return (BOOLEAN) (Queue->Head == Queue->Tail);
}
/**
Check whether USB keyboard buffer is full.
Check whether the queue is full.
@param KeyboardBuffer USB keyboard buffer
@param Queue Points to the queue.
@retval TRUE Keyboard buffer is full.
@retval FALSE Keyboard buffer is not full.
@retval TRUE Queue is full.
@retval FALSE Queue is not full.
**/
BOOLEAN
EFIAPI
IsUSBKeyboardBufferFull (
IN USB_KB_BUFFER *KeyboardBuffer
IsQueueFull (
IN USB_SIMPLE_QUEUE *Queue
)
{
return (BOOLEAN)(((KeyboardBuffer->BufferTail + 1) % (MAX_KEY_ALLOWED + 1)) == KeyboardBuffer->BufferHead);
return (BOOLEAN) (((Queue->Tail + 1) % (MAX_KEY_ALLOWED + 1)) == Queue->Head);
}
/**
Inserts a keycode into keyboard buffer.
@param KeyboardBuffer Points to the USB keyboard buffer.
@param Key Keycode to insert.
@param Down TRUE means key is pressed.
FALSE means key is released.
Enqueue the item to the queue.
@param Queue Points to the queue.
@param Item Points to the item to be enqueued.
@param ItemSize Size of the item.
**/
VOID
EFIAPI
InsertKeyCode (
IN OUT USB_KB_BUFFER *KeyboardBuffer,
IN UINT8 Key,
IN BOOLEAN Down
Enqueue (
IN OUT USB_SIMPLE_QUEUE *Queue,
IN VOID *Item,
IN UINTN ItemSize
)
{
USB_KEY UsbKey;
ASSERT (ItemSize == Queue->ItemSize);
//
// If keyboard buffer is full, throw the
// first key out of the keyboard buffer.
//
if (IsUSBKeyboardBufferFull (KeyboardBuffer)) {
RemoveKeyCode (KeyboardBuffer, &UsbKey);
if (IsQueueFull (Queue)) {
Queue->Head = (Queue->Head + 1) % (MAX_KEY_ALLOWED + 1);
}
ASSERT (KeyboardBuffer->BufferTail <= MAX_KEY_ALLOWED);
KeyboardBuffer->Buffer[KeyboardBuffer->BufferTail].KeyCode = Key;
KeyboardBuffer->Buffer[KeyboardBuffer->BufferTail].Down = Down;
CopyMem (Queue->Buffer[Queue->Tail], Item, ItemSize);
//
// Adjust the tail pointer of the FIFO keyboard buffer.
//
KeyboardBuffer->BufferTail = (UINT8) ((KeyboardBuffer->BufferTail + 1) % (MAX_KEY_ALLOWED + 1));
Queue->Tail = (Queue->Tail + 1) % (MAX_KEY_ALLOWED + 1);
}
/**
Remove a keycode from keyboard buffer and return it.
Dequeue a item from the queue.
@param KeyboardBuffer Points to the USB keyboard buffer.
@param UsbKey Points to the buffer that contains keycode for output.
@param Queue Points to the queue.
@param Item Receives the item.
@param ItemSize Size of the item.
@retval EFI_SUCCESS Keycode successfully removed from keyboard buffer.
@retval EFI_DEVICE_ERROR Keyboard buffer is empty.
@retval EFI_SUCCESS Item was successfully dequeued.
@retval EFI_DEVICE_ERROR The queue is empty.
**/
EFI_STATUS
EFIAPI
RemoveKeyCode (
IN OUT USB_KB_BUFFER *KeyboardBuffer,
OUT USB_KEY *UsbKey
Dequeue (
IN OUT USB_SIMPLE_QUEUE *Queue,
OUT VOID *Item,
IN UINTN ItemSize
)
{
if (IsUSBKeyboardBufferEmpty (KeyboardBuffer)) {
ASSERT (Queue->ItemSize == ItemSize);
if (IsQueueEmpty (Queue)) {
return EFI_DEVICE_ERROR;
}
ASSERT (KeyboardBuffer->BufferHead <= MAX_KEY_ALLOWED);
UsbKey->KeyCode = KeyboardBuffer->Buffer[KeyboardBuffer->BufferHead].KeyCode;
UsbKey->Down = KeyboardBuffer->Buffer[KeyboardBuffer->BufferHead].Down;
CopyMem (Item, Queue->Buffer[Queue->Head], ItemSize);
//
// Adjust the head pointer of the FIFO keyboard buffer.
//
KeyboardBuffer->BufferHead = (UINT8) ((KeyboardBuffer->BufferHead + 1) % (MAX_KEY_ALLOWED + 1));
Queue->Head = (Queue->Head + 1) % (MAX_KEY_ALLOWED + 1);
return EFI_SUCCESS;
}
@@ -1918,7 +1874,6 @@ RemoveKeyCode (
**/
VOID
EFIAPI
SetKeyLED (
IN USB_KB_DEV *UsbKeyboardDevice
)
@@ -1970,6 +1925,7 @@ USBKeyboardRepeatHandler (
)
{
USB_KB_DEV *UsbKeyboardDevice;
USB_KEY UsbKey;
UsbKeyboardDevice = (USB_KB_DEV *) Context;
@@ -1980,11 +1936,9 @@ USBKeyboardRepeatHandler (
//
// Inserts the repeat key into keyboard buffer,
//
InsertKeyCode (
&(UsbKeyboardDevice->KeyboardBuffer),
UsbKeyboardDevice->RepeatKey,
TRUE
);
UsbKey.KeyCode = UsbKeyboardDevice->RepeatKey;
UsbKey.Down = TRUE;
Enqueue (&UsbKeyboardDevice->UsbKeyQueue, &UsbKey, sizeof (UsbKey));
//
// Set repeat rate for next repeat key generation.