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qemu / edk2 / refs/heads/svn/branches/AntJava / . / MdeModulePkg / Bus / Usb / UsbKbDxe / KeyBoard.c
blob: 79598c5a01dc002b95d15299d824b637ad75e73e [file] [log] [blame]
/** @file
Helper functions for USB Keyboard Driver.
Copyright (c) 2004 - 2008, Intel Corporation
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.
**/
#include "KeyBoard.h"
//
// Default English keyboard layout
// Format:<efi key>, <unicode without shift>, <unicode with shift>, <Modifier>, <AffectedAttribute>
//
// According to Universal Serial Bus HID Usage Tables document ver 1.12,
// a Boot Keyboard should support the keycode range from 0x0 to 0x65 and 0xE0 to 0xE7.
// 0x0 to 0x3 are reserved for typical keyboard status or keyboard errors, so they are excluded.
//
UINT8 KeyboardLayoutTable[NUMBER_OF_VALID_USB_KEYCODE][5] = {
{EfiKeyC1, 'a', 'A', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x04
{EfiKeyB5, 'b', 'B', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x05
{EfiKeyB3, 'c', 'C', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x06
{EfiKeyC3, 'd', 'D', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x07
{EfiKeyD3, 'e', 'E', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x08
{EfiKeyC4, 'f', 'F', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x09
{EfiKeyC5, 'g', 'G', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0A
{EfiKeyC6, 'h', 'H', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0B
{EfiKeyD8, 'i', 'I', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0C
{EfiKeyC7, 'j', 'J', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0D
{EfiKeyC8, 'k', 'K', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0E
{EfiKeyC9, 'l', 'L', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x0F
{EfiKeyB7, 'm', 'M', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x10
{EfiKeyB6, 'n', 'N', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x11
{EfiKeyD9, 'o', 'O', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x12
{EfiKeyD10, 'p', 'P', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x13
{EfiKeyD1, 'q', 'Q', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x14
{EfiKeyD4, 'r', 'R', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x15
{EfiKeyC2, 's', 'S', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x16
{EfiKeyD5, 't', 'T', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x17
{EfiKeyD7, 'u', 'U', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x18
{EfiKeyB4, 'v', 'V', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x19
{EfiKeyD2, 'w', 'W', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x1A
{EfiKeyB2, 'x', 'X', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x1B
{EfiKeyD6, 'y', 'Y', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x1C
{EfiKeyB1, 'z', 'Z', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_CAPS_LOCK}, // 0x1D
{EfiKeyE1, '1', '!', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x1E
{EfiKeyE2, '2', '@', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x1F
{EfiKeyE3, '3', '#', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x20
{EfiKeyE4, '4', '$', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x21
{EfiKeyE5, '5', '%', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x22
{EfiKeyE6, '6', '^', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x23
{EfiKeyE7, '7', '&', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x24
{EfiKeyE8, '8', '*', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x25
{EfiKeyE9, '9', '(', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x26
{EfiKeyE10, '0', ')', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x27
{EfiKeyEnter, 0x0d, 0x0d, EFI_NULL_MODIFIER, 0}, // 0x28 Enter
{EfiKeyEsc, 0x1b, 0x1b, EFI_NULL_MODIFIER, 0}, // 0x29 Esc
{EfiKeyBackSpace, 0x08, 0x08, EFI_NULL_MODIFIER, 0}, // 0x2A Backspace
{EfiKeyTab, 0x09, 0x09, EFI_NULL_MODIFIER, 0}, // 0x2B Tab
{EfiKeySpaceBar, ' ', ' ', EFI_NULL_MODIFIER, 0}, // 0x2C Spacebar
{EfiKeyE11, '-', '_', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x2D
{EfiKeyE12, '=', '+', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x2E
{EfiKeyD11, '[', '{', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x2F
{EfiKeyD12, ']', '}', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x30
{EfiKeyD13, '\\', '|', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x31
{EfiKeyC12, '\\', '|', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x32 Keyboard Non-US # and ~
{EfiKeyC10, ';', ':', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x33
{EfiKeyC11, '\'', '"', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x34
{EfiKeyE0, '`', '~', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x35 Keyboard Grave Accent and Tlide
{EfiKeyB8, ',', '<', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x36
{EfiKeyB9, '.', '>', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x37
{EfiKeyB10, '/', '?', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x38
{EfiKeyCapsLock, 0x00, 0x00, EFI_CAPS_LOCK_MODIFIER, 0}, // 0x39 CapsLock
{EfiKeyF1, 0x00, 0x00, EFI_FUNCTION_KEY_ONE_MODIFIER, 0}, // 0x3A
{EfiKeyF2, 0x00, 0x00, EFI_FUNCTION_KEY_TWO_MODIFIER, 0}, // 0x3B
{EfiKeyF3, 0x00, 0x00, EFI_FUNCTION_KEY_THREE_MODIFIER, 0}, // 0x3C
{EfiKeyF4, 0x00, 0x00, EFI_FUNCTION_KEY_FOUR_MODIFIER, 0}, // 0x3D
{EfiKeyF5, 0x00, 0x00, EFI_FUNCTION_KEY_FIVE_MODIFIER, 0}, // 0x3E
{EfiKeyF6, 0x00, 0x00, EFI_FUNCTION_KEY_SIX_MODIFIER, 0}, // 0x3F
{EfiKeyF7, 0x00, 0x00, EFI_FUNCTION_KEY_SEVEN_MODIFIER, 0}, // 0x40
{EfiKeyF8, 0x00, 0x00, EFI_FUNCTION_KEY_EIGHT_MODIFIER, 0}, // 0x41
{EfiKeyF9, 0x00, 0x00, EFI_FUNCTION_KEY_NINE_MODIFIER, 0}, // 0x42
{EfiKeyF10, 0x00, 0x00, EFI_FUNCTION_KEY_TEN_MODIFIER, 0}, // 0x43
{EfiKeyF11, 0x00, 0x00, EFI_FUNCTION_KEY_ELEVEN_MODIFIER, 0}, // 0x44 F11
{EfiKeyF12, 0x00, 0x00, EFI_FUNCTION_KEY_TWELVE_MODIFIER, 0}, // 0x45 F12
{EfiKeyPrint, 0x00, 0x00, EFI_PRINT_MODIFIER, 0}, // 0x46 PrintScreen
{EfiKeySLck, 0x00, 0x00, EFI_SCROLL_LOCK_MODIFIER, 0}, // 0x47 Scroll Lock
{EfiKeyPause, 0x00, 0x00, EFI_PAUSE_MODIFIER, 0}, // 0x48 Pause
{EfiKeyIns, 0x00, 0x00, EFI_INSERT_MODIFIER, 0}, // 0x49
{EfiKeyHome, 0x00, 0x00, EFI_HOME_MODIFIER, 0}, // 0x4A
{EfiKeyPgUp, 0x00, 0x00, EFI_PAGE_UP_MODIFIER, 0}, // 0x4B
{EfiKeyDel, 0x00, 0x00, EFI_DELETE_MODIFIER, 0}, // 0x4C
{EfiKeyEnd, 0x00, 0x00, EFI_END_MODIFIER, 0}, // 0x4D
{EfiKeyPgDn, 0x00, 0x00, EFI_PAGE_DOWN_MODIFIER, 0}, // 0x4E
{EfiKeyRightArrow, 0x00, 0x00, EFI_RIGHT_ARROW_MODIFIER, 0}, // 0x4F
{EfiKeyLeftArrow, 0x00, 0x00, EFI_LEFT_ARROW_MODIFIER, 0}, // 0x50
{EfiKeyDownArrow, 0x00, 0x00, EFI_DOWN_ARROW_MODIFIER, 0}, // 0x51
{EfiKeyUpArrow, 0x00, 0x00, EFI_UP_ARROW_MODIFIER, 0}, // 0x52
{EfiKeyNLck, 0x00, 0x00, EFI_NUM_LOCK_MODIFIER, 0}, // 0x53 NumLock
{EfiKeySlash, '/', '/', EFI_NULL_MODIFIER, 0}, // 0x54
{EfiKeyAsterisk, '*', '*', EFI_NULL_MODIFIER, 0}, // 0x55
{EfiKeyMinus, '-', '-', EFI_NULL_MODIFIER, 0}, // 0x56
{EfiKeyPlus, '+', '+', EFI_NULL_MODIFIER, 0}, // 0x57
{EfiKeyEnter, 0x0d, 0x0d, EFI_NULL_MODIFIER, 0}, // 0x58
{EfiKeyOne, '1', '1', EFI_END_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x59
{EfiKeyTwo, '2', '2', EFI_DOWN_ARROW_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5A
{EfiKeyThree, '3', '3', EFI_PAGE_DOWN_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5B
{EfiKeyFour, '4', '4', EFI_LEFT_ARROW_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5C
{EfiKeyFive, '5', '5', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5D
{EfiKeySix, '6', '6', EFI_RIGHT_ARROW_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5E
{EfiKeySeven, '7', '7', EFI_HOME_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x5F
{EfiKeyEight, '8', '8', EFI_UP_ARROW_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x60
{EfiKeyNine, '9', '9', EFI_PAGE_UP_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x61
{EfiKeyZero, '0', '0', EFI_INSERT_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x62
{EfiKeyPeriod, '.', '.', EFI_DELETE_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT | EFI_AFFECTED_BY_NUM_LOCK}, // 0x63
{EfiKeyB0, '\\', '|', EFI_NULL_MODIFIER, EFI_AFFECTED_BY_STANDARD_SHIFT}, // 0x64 Keyboard Non-US \ and |
{EfiKeyA4, 0x00, 0x00, EFI_MENU_MODIFIER, 0}, // 0x65 Keyboard Application
{EfiKeyLCtrl, 0, 0, EFI_LEFT_CONTROL_MODIFIER, 0}, // 0xe0
{EfiKeyLShift, 0, 0, EFI_LEFT_SHIFT_MODIFIER, 0}, // 0xe1
{EfiKeyLAlt, 0, 0, EFI_LEFT_ALT_MODIFIER, 0}, // 0xe2
{EfiKeyA0, 0, 0, EFI_LEFT_LOGO_MODIFIER, 0}, // 0xe3
{EfiKeyRCtrl, 0, 0, EFI_RIGHT_CONTROL_MODIFIER, 0}, // 0xe4
{EfiKeyRShift, 0, 0, EFI_RIGHT_SHIFT_MODIFIER, 0}, // 0xe5
{EfiKeyA2, 0, 0, EFI_RIGHT_ALT_MODIFIER, 0}, // 0xe6
{EfiKeyA3, 0, 0, EFI_RIGHT_LOGO_MODIFIER, 0}, // 0xe7
};
//
// EFI_KEY to USB Keycode convertion table
// EFI_KEY is defined in UEFI spec.
// USB Keycode is defined in USB HID Firmware spec.
//
UINT8 EfiKeyToUsbKeyCodeConvertionTable[] = {
0xe0, // EfiKeyLCtrl
0xe3, // EfiKeyA0
0xe2, // EfiKeyLAlt
0x2c, // EfiKeySpaceBar
0xe6, // EfiKeyA2
0xe7, // EfiKeyA3
0x65, // EfiKeyA4
0xe4, // EfiKeyRCtrl
0x50, // EfiKeyLeftArrow
0x51, // EfiKeyDownArrow
0x4F, // EfiKeyRightArrow
0x62, // EfiKeyZero
0x63, // EfiKeyPeriod
0x28, // EfiKeyEnter
0xe1, // EfiKeyLShift
0x64, // EfiKeyB0
0x1D, // EfiKeyB1
0x1B, // EfiKeyB2
0x06, // EfiKeyB3
0x19, // EfiKeyB4
0x05, // EfiKeyB5
0x11, // EfiKeyB6
0x10, // EfiKeyB7
0x36, // EfiKeyB8
0x37, // EfiKeyB9
0x38, // EfiKeyB10
0xe5, // EfiKeyRShift
0x52, // EfiKeyUpArrow
0x59, // EfiKeyOne
0x5A, // EfiKeyTwo
0x5B, // EfiKeyThree
0x39, // EfiKeyCapsLock
0x04, // EfiKeyC1
0x16, // EfiKeyC2
0x07, // EfiKeyC3
0x09, // EfiKeyC4
0x0A, // EfiKeyC5
0x0B, // EfiKeyC6
0x0D, // EfiKeyC7
0x0E, // EfiKeyC8
0x0F, // EfiKeyC9
0x33, // EfiKeyC10
0x34, // EfiKeyC11
0x32, // EfiKeyC12
0x5C, // EfiKeyFour
0x5D, // EfiKeyFive
0x5E, // EfiKeySix
0x57, // EfiKeyPlus
0x2B, // EfiKeyTab
0x14, // EfiKeyD1
0x1A, // EfiKeyD2
0x08, // EfiKeyD3
0x15, // EfiKeyD4
0x17, // EfiKeyD5
0x1C, // EfiKeyD6
0x18, // EfiKeyD7
0x0C, // EfiKeyD8
0x12, // EfiKeyD9
0x13, // EfiKeyD10
0x2F, // EfiKeyD11
0x30, // EfiKeyD12
0x31, // EfiKeyD13
0x4C, // EfiKeyDel
0x4D, // EfiKeyEnd
0x4E, // EfiKeyPgDn
0x5F, // EfiKeySeven
0x60, // EfiKeyEight
0x61, // EfiKeyNine
0x35, // EfiKeyE0
0x1E, // EfiKeyE1
0x1F, // EfiKeyE2
0x20, // EfiKeyE3
0x21, // EfiKeyE4
0x22, // EfiKeyE5
0x23, // EfiKeyE6
0x24, // EfiKeyE7
0x25, // EfiKeyE8
0x26, // EfiKeyE9
0x27, // EfiKeyE10
0x2D, // EfiKeyE11
0x2E, // EfiKeyE12
0x2A, // EfiKeyBackSpace
0x49, // EfiKeyIns
0x4A, // EfiKeyHome
0x4B, // EfiKeyPgUp
0x53, // EfiKeyNLck
0x54, // EfiKeySlash
0x55, // EfiKeyAsterisk
0x56, // EfiKeyMinus
0x29, // EfiKeyEsc
0x3A, // EfiKeyF1
0x3B, // EfiKeyF2
0x3C, // EfiKeyF3
0x3D, // EfiKeyF4
0x3E, // EfiKeyF5
0x3F, // EfiKeyF6
0x40, // EfiKeyF7
0x41, // EfiKeyF8
0x42, // EfiKeyF9
0x43, // EfiKeyF10
0x44, // EfiKeyF11
0x45, // EfiKeyF12
0x46, // EfiKeyPrint
0x47, // EfiKeySLck
0x48 // EfiKeyPause
};
//
// Keyboard modifier value to EFI Scan Code convertion table
// EFI Scan Code and the modifier values are defined in UEFI spec.
//
UINT8 ModifierValueToEfiScanCodeConvertionTable[] = {
SCAN_NULL, // EFI_NULL_MODIFIER
SCAN_NULL, // EFI_LEFT_CONTROL_MODIFIER
SCAN_NULL, // EFI_RIGHT_CONTROL_MODIFIER
SCAN_NULL, // EFI_LEFT_ALT_MODIFIER
SCAN_NULL, // EFI_RIGHT_ALT_MODIFIER
SCAN_NULL, // EFI_ALT_GR_MODIFIER
SCAN_INSERT, // EFI_INSERT_MODIFIER
SCAN_DELETE, // EFI_DELETE_MODIFIER
SCAN_PAGE_DOWN, // EFI_PAGE_DOWN_MODIFIER
SCAN_PAGE_UP, // EFI_PAGE_UP_MODIFIER
SCAN_HOME, // EFI_HOME_MODIFIER
SCAN_END, // EFI_END_MODIFIER
SCAN_NULL, // EFI_LEFT_SHIFT_MODIFIER
SCAN_NULL, // EFI_RIGHT_SHIFT_MODIFIER
SCAN_NULL, // EFI_CAPS_LOCK_MODIFIER
SCAN_NULL, // EFI_NUM_LOCK_MODIFIER
SCAN_LEFT, // EFI_LEFT_ARROW_MODIFIER
SCAN_RIGHT, // EFI_RIGHT_ARROW_MODIFIER
SCAN_DOWN, // EFI_DOWN_ARROW_MODIFIER
SCAN_UP, // EFI_UP_ARROW_MODIFIER
SCAN_NULL, // EFI_NS_KEY_MODIFIER
SCAN_NULL, // EFI_NS_KEY_DEPENDENCY_MODIFIER
SCAN_F1, // EFI_FUNCTION_KEY_ONE_MODIFIER
SCAN_F2, // EFI_FUNCTION_KEY_TWO_MODIFIER
SCAN_F3, // EFI_FUNCTION_KEY_THREE_MODIFIER
SCAN_F4, // EFI_FUNCTION_KEY_FOUR_MODIFIER
SCAN_F5, // EFI_FUNCTION_KEY_FIVE_MODIFIER
SCAN_F6, // EFI_FUNCTION_KEY_SIX_MODIFIER
SCAN_F7, // EFI_FUNCTION_KEY_SEVEN_MODIFIER
SCAN_F8, // EFI_FUNCTION_KEY_EIGHT_MODIFIER
SCAN_F9, // EFI_FUNCTION_KEY_NINE_MODIFIER
SCAN_F10, // EFI_FUNCTION_KEY_TEN_MODIFIER
SCAN_F11, // EFI_FUNCTION_KEY_ELEVEN_MODIFIER
SCAN_F12, // EFI_FUNCTION_KEY_TWELVE_MODIFIER
};
EFI_GUID mKeyboardLayoutEventGuid = EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID;
/**
Initialize Key Convertion Table by using default keyboard layout.
@param UsbKeyboardDevice The USB_KB_DEV instance.
**/
VOID
EFIAPI
LoadDefaultKeyboardLayout (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
{
UINTN Index;
EFI_KEY_DESCRIPTOR *KeyDescriptor;
//
// Construct KeyConvertionTable by default keyboard layout
//
KeyDescriptor = &UsbKeyboardDevice->KeyConvertionTable[0];
for (Index = 0; Index < (NUMBER_OF_VALID_USB_KEYCODE); Index++) {
KeyDescriptor->Key = (EFI_KEY) KeyboardLayoutTable[Index][0];
KeyDescriptor->Unicode = KeyboardLayoutTable[Index][1];
KeyDescriptor->ShiftedUnicode = KeyboardLayoutTable[Index][2];
KeyDescriptor->AltGrUnicode = 0;
KeyDescriptor->ShiftedAltGrUnicode = 0;
KeyDescriptor->Modifier = KeyboardLayoutTable[Index][3];
KeyDescriptor->AffectedAttribute = KeyboardLayoutTable[Index][4];
KeyDescriptor++;
}
}
/**
Uses USB I/O to check whether the device is a USB keyboard device.
@param UsbIo Pointer to a USB I/O protocol instance.
@retval TRUE Device is a USB keyboard device.
@retval FALSE Device is a not USB keyboard device.
**/
BOOLEAN
EFIAPI
IsUSBKeyboard (
IN EFI_USB_IO_PROTOCOL *UsbIo
)
{
EFI_STATUS Status;
EFI_USB_INTERFACE_DESCRIPTOR InterfaceDescriptor;
//
// Get the default interface descriptor
//
Status = UsbIo->UsbGetInterfaceDescriptor (
UsbIo,
&InterfaceDescriptor
);
if (EFI_ERROR (Status)) {
return FALSE;
}
if (InterfaceDescriptor.InterfaceClass == CLASS_HID &&
InterfaceDescriptor.InterfaceSubClass == SUBCLASS_BOOT &&
InterfaceDescriptor.InterfaceProtocol == PROTOCOL_KEYBOARD
) {
return TRUE;
}
return FALSE;
}
/**
Get current keyboard layout from HII database.
@return Pointer to HII Keyboard Layout.
NULL means failure occurred while trying to get keyboard layout.
**/
EFI_HII_KEYBOARD_LAYOUT *
EFIAPI
GetCurrentKeyboardLayout (
VOID
)
{
EFI_STATUS Status;
EFI_HII_DATABASE_PROTOCOL *HiiDatabase;
EFI_HII_KEYBOARD_LAYOUT *KeyboardLayout;
UINT16 Length;
//
// Locate HII Database Protocol
//
Status = gBS->LocateProtocol (
&gEfiHiiDatabaseProtocolGuid,
NULL,
(VOID **) &HiiDatabase
);
if (EFI_ERROR (Status)) {
return NULL;
}
//
// Get current keyboard layout from HII database
//
Length = 0;
KeyboardLayout = NULL;
Status = HiiDatabase->GetKeyboardLayout (
HiiDatabase,
NULL,
&Length,
KeyboardLayout
);
if (Status == EFI_BUFFER_TOO_SMALL) {
KeyboardLayout = AllocatePool (Length);
ASSERT (KeyboardLayout != NULL);
Status = HiiDatabase->GetKeyboardLayout (
HiiDatabase,
NULL,
&Length,
KeyboardLayout
);
if (EFI_ERROR (Status)) {
gBS->FreePool (KeyboardLayout);
KeyboardLayout = NULL;
}
}
return KeyboardLayout;
}
/**
Find Key Descriptor in Key Convertion Table given its USB keycode.
@param UsbKeyboardDevice The USB_KB_DEV instance.
@param KeyCode USB Keycode.
@return The Key Descriptor in Key Convertion Table.
NULL means not found.
**/
EFI_KEY_DESCRIPTOR *
EFIAPI
GetKeyDescriptor (
IN USB_KB_DEV *UsbKeyboardDevice,
IN UINT8 KeyCode
)
{
UINT8 Index;
//
// Make sure KeyCode is in the range of [0x4, 0x65] or [0xe0, 0xe7]
//
if ((!USBKBD_VALID_KEYCODE (KeyCode)) || ((KeyCode > 0x65) && (KeyCode < 0xe0)) || (KeyCode > 0xe7)) {
return NULL;
}
//
// Calculate the index of Key Descriptor in Key Convertion Table
//
if (KeyCode <= 0x65) {
Index = (UINT8) (KeyCode - 4);
} else {
Index = (UINT8) (KeyCode - 0xe0 + NUMBER_OF_VALID_NON_MODIFIER_USB_KEYCODE);
}
return &UsbKeyboardDevice->KeyConvertionTable[Index];
}
/**
Find Non-Spacing key for given Key descriptor.
@param UsbKeyboardDevice The USB_KB_DEV instance.
@param KeyDescriptor Key descriptor.
@return The Non-Spacing key corresponding to KeyDescriptor
NULL means not found.
**/
USB_NS_KEY *
EFIAPI
FindUsbNsKey (
IN USB_KB_DEV *UsbKeyboardDevice,
IN EFI_KEY_DESCRIPTOR *KeyDescriptor
)
{
LIST_ENTRY *Link;
LIST_ENTRY *NsKeyList;
USB_NS_KEY *UsbNsKey;
NsKeyList = &UsbKeyboardDevice->NsKeyList;
Link = GetFirstNode (NsKeyList);
while (!IsNull (NsKeyList, Link)) {
UsbNsKey = USB_NS_KEY_FORM_FROM_LINK (Link);
if (UsbNsKey->NsKey[0].Key == KeyDescriptor->Key) {
return UsbNsKey;
}
Link = GetNextNode (NsKeyList, Link);
}
return NULL;
}
/**
Find physical key definition for a given key descriptor.
For a specified non-spacing key, there are a list of physical
keys following it. This function traverses the list of
physical keys and tries to find the physical key matching
the KeyDescriptor.
@param UsbNsKey The non-spacing key information.
@param KeyDescriptor The key descriptor.
@return The physical key definition.
If no physical key is found, parameter KeyDescriptor is returned.
**/
EFI_KEY_DESCRIPTOR *
EFIAPI
FindPhysicalKey (
IN USB_NS_KEY *UsbNsKey,
IN EFI_KEY_DESCRIPTOR *KeyDescriptor
)
{
UINTN Index;
EFI_KEY_DESCRIPTOR *PhysicalKey;
PhysicalKey = &UsbNsKey->NsKey[1];
for (Index = 0; Index < UsbNsKey->KeyCount; Index++) {
if (KeyDescriptor->Key == PhysicalKey->Key) {
return PhysicalKey;
}
PhysicalKey++;
}
//
// No children definition matched, return original key
//
return KeyDescriptor;
}
/**
The notification function for EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID.
This function is registered to event of EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID
group type, which will be triggered by EFI_HII_DATABASE_PROTOCOL.SetKeyboardLayout().
It tries to get curent keyboard layout from HII database.
@param Event Event being signaled.
@param Context Points to USB_KB_DEV instance.
**/
VOID
EFIAPI
SetKeyboardLayoutEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
USB_KB_DEV *UsbKeyboardDevice;
EFI_HII_KEYBOARD_LAYOUT *KeyboardLayout;
EFI_KEY_DESCRIPTOR TempKey;
EFI_KEY_DESCRIPTOR *KeyDescriptor;
EFI_KEY_DESCRIPTOR *TableEntry;
EFI_KEY_DESCRIPTOR *NsKey;
USB_NS_KEY *UsbNsKey;
UINTN Index;
UINTN Index2;
UINTN KeyCount;
UINT8 KeyCode;
UsbKeyboardDevice = (USB_KB_DEV *) Context;
//
// Try to get current keyboard layout from HII database
//
KeyboardLayout = GetCurrentKeyboardLayout ();
if (KeyboardLayout == NULL) {
return;
}
//
// Re-allocate resource for KeyConvertionTable
//
ReleaseKeyboardLayoutResources (UsbKeyboardDevice);
UsbKeyboardDevice->KeyConvertionTable = AllocateZeroPool ((NUMBER_OF_VALID_USB_KEYCODE) * sizeof (EFI_KEY_DESCRIPTOR));
ASSERT (UsbKeyboardDevice->KeyConvertionTable != NULL);
//
// Traverse the list of key descriptors following the header of EFI_HII_KEYBOARD_LAYOUT
//
KeyDescriptor = (EFI_KEY_DESCRIPTOR *) (((UINT8 *) KeyboardLayout) + sizeof (EFI_HII_KEYBOARD_LAYOUT));
for (Index = 0; Index < KeyboardLayout->DescriptorCount; Index++) {
//
// Copy from HII keyboard layout package binary for alignment
//
CopyMem (&TempKey, KeyDescriptor, sizeof (EFI_KEY_DESCRIPTOR));
//
// Fill the key into KeyConvertionTable, whose index is calculated from USB keycode.
//
KeyCode = EfiKeyToUsbKeyCodeConvertionTable [(UINT8) (TempKey.Key)];
TableEntry = GetKeyDescriptor (UsbKeyboardDevice, KeyCode);
CopyMem (TableEntry, KeyDescriptor, sizeof (EFI_KEY_DESCRIPTOR));
//
// For non-spacing key, create the list with a non-spacing key followed by physical keys.
//
if (TempKey.Modifier == EFI_NS_KEY_MODIFIER) {
UsbNsKey = AllocatePool (sizeof (USB_NS_KEY));
ASSERT (UsbNsKey != NULL);
//
// Search for sequential children physical key definitions
//
KeyCount = 0;
NsKey = KeyDescriptor + 1;
for (Index2 = Index + 1; Index2 < KeyboardLayout->DescriptorCount; Index2++) {
CopyMem (&TempKey, NsKey, sizeof (EFI_KEY_DESCRIPTOR));
if (TempKey.Modifier & EFI_NS_KEY_DEPENDENCY_MODIFIER) {
KeyCount++;
} else {
break;
}
NsKey++;
}
UsbNsKey->Signature = USB_NS_KEY_SIGNATURE;
UsbNsKey->KeyCount = KeyCount;
UsbNsKey->NsKey = AllocateCopyPool (
(KeyCount + 1) * sizeof (EFI_KEY_DESCRIPTOR),
KeyDescriptor
);
InsertTailList (&UsbKeyboardDevice->NsKeyList, &UsbNsKey->Link);
//
// Skip over the child physical keys
//
Index += KeyCount;
KeyDescriptor += KeyCount;
}
KeyDescriptor++;
}
//
// There are two EfiKeyEnter, duplicate its key descriptor
//
TableEntry = GetKeyDescriptor (UsbKeyboardDevice, 0x58);
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, 0x28);
CopyMem (TableEntry, KeyDescriptor, sizeof (EFI_KEY_DESCRIPTOR));
FreePool (KeyboardLayout);
}
/**
Destroy resources for keyboard layout.
@param UsbKeyboardDevice The USB_KB_DEV instance.
**/
VOID
EFIAPI
ReleaseKeyboardLayoutResources (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
{
USB_NS_KEY *UsbNsKey;
LIST_ENTRY *Link;
if (UsbKeyboardDevice->KeyConvertionTable != NULL) {
FreePool (UsbKeyboardDevice->KeyConvertionTable);
}
UsbKeyboardDevice->KeyConvertionTable = NULL;
while (!IsListEmpty (&UsbKeyboardDevice->NsKeyList)) {
Link = GetFirstNode (&UsbKeyboardDevice->NsKeyList);
UsbNsKey = USB_NS_KEY_FORM_FROM_LINK (Link);
RemoveEntryList (&UsbNsKey->Link);
FreePool (UsbNsKey->NsKey);
FreePool (UsbNsKey);
}
}
/**
Initialize USB keyboard layout.
This function initializes Key Convertion Table for the USB keyboard device.
It first tries to retrieve layout from HII database. If failed and default
layout is enabled, then it just uses the default layout.
@param UsbKeyboardDevice The USB_KB_DEV instance.
@retval EFI_SUCCESS Initialization succeeded.
@retval EFI_NOT_READY Keyboard layout cannot be retrieve from HII
database, and default layout is disabled.
@retval Other Fail to register event to EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID group.
**/
EFI_STATUS
EFIAPI
InitKeyboardLayout (
OUT USB_KB_DEV *UsbKeyboardDevice
)
{
EFI_HII_KEYBOARD_LAYOUT *KeyboardLayout;
EFI_STATUS Status;
UsbKeyboardDevice->KeyConvertionTable = AllocateZeroPool ((NUMBER_OF_VALID_USB_KEYCODE) * sizeof (EFI_KEY_DESCRIPTOR));
ASSERT (UsbKeyboardDevice->KeyConvertionTable != NULL);
InitializeListHead (&UsbKeyboardDevice->NsKeyList);
UsbKeyboardDevice->CurrentNsKey = NULL;
UsbKeyboardDevice->KeyboardLayoutEvent = NULL;
//
// Register event to EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID group,
// which will be triggered by EFI_HII_DATABASE_PROTOCOL.SetKeyboardLayout().
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
SetKeyboardLayoutEvent,
UsbKeyboardDevice,
&mKeyboardLayoutEventGuid,
&UsbKeyboardDevice->KeyboardLayoutEvent
);
if (EFI_ERROR (Status)) {
return Status;
}
KeyboardLayout = GetCurrentKeyboardLayout ();
if (KeyboardLayout != NULL) {
//
// If current keyboard layout is successfully retrieved from HII database,
// force to initialize the keyboard layout.
//
gBS->SignalEvent (UsbKeyboardDevice->KeyboardLayoutEvent);
} else {
if (FeaturePcdGet (PcdDisableDefaultKeyboardLayoutInUsbKbDriver)) {
//
// If no keyboard layout can be retrieved from HII database, and default layout
// is disabled, then return EFI_NOT_READY.
//
return EFI_NOT_READY;
}
//
// If no keyboard layout can be retrieved from HII database, and default layout
// is enabled, then load the default keyboard layout.
//
LoadDefaultKeyboardLayout (UsbKeyboardDevice);
}
return EFI_SUCCESS;
}
/**
Initialize USB keyboard device and all private data structures.
@param UsbKeyboardDevice The USB_KB_DEV instance.
@retval EFI_SUCCESS Initialization is successful.
@retval EFI_DEVICE_ERROR Keyboard initialization failed.
**/
EFI_STATUS
EFIAPI
InitUSBKeyboard (
IN OUT USB_KB_DEV *UsbKeyboardDevice
)
{
UINT8 ConfigValue;
UINT8 Protocol;
UINT8 ReportId;
UINT8 Duration;
EFI_STATUS Status;
UINT32 TransferResult;
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
PcdGet32 (PcdStatusCodeValueKeyboardSelfTest),
UsbKeyboardDevice->DevicePath
);
InitUSBKeyBuffer (&(UsbKeyboardDevice->KeyboardBuffer));
//
// Uses default configuration to configure the USB keyboard device.
//
ConfigValue = 0x01;
Status = UsbSetConfiguration (
UsbKeyboardDevice->UsbIo,
(UINT16) ConfigValue,
&TransferResult
);
if (EFI_ERROR (Status)) {
//
// If configuration could not be set here, it means
// the keyboard interface has some errors and could
// not be initialized
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
PcdGet32 (PcdStatusCodeValueKeyboardInterfaceError),
UsbKeyboardDevice->DevicePath
);
return EFI_DEVICE_ERROR;
}
UsbGetProtocolRequest (
UsbKeyboardDevice->UsbIo,
UsbKeyboardDevice->InterfaceDescriptor.InterfaceNumber,
&Protocol
);
//
// Set boot protocol for the USB Keyboard.
// This driver only supports boot protocol.
// The device that does not support boot protocol is not supported.
//
if (Protocol != BOOT_PROTOCOL) {
UsbSetProtocolRequest (
UsbKeyboardDevice->UsbIo,
UsbKeyboardDevice->InterfaceDescriptor.InterfaceNumber,
BOOT_PROTOCOL
);
}
//
// ReportId is zero, which means the idle rate applies to all input reports.
//
ReportId = 0;
//
// Duration is zero, which means the duration is infinite.
// so the endpoint will inhibit reporting forever,
// and only reporting when a change is detected in the report data.
//
Duration = 0;
UsbSetIdleRequest (
UsbKeyboardDevice->UsbIo,
UsbKeyboardDevice->InterfaceDescriptor.InterfaceNumber,
ReportId,
Duration
);
UsbKeyboardDevice->CtrlOn = FALSE;
UsbKeyboardDevice->AltOn = FALSE;
UsbKeyboardDevice->ShiftOn = FALSE;
UsbKeyboardDevice->NumLockOn = FALSE;
UsbKeyboardDevice->CapsOn = FALSE;
UsbKeyboardDevice->ScrollOn = FALSE;
UsbKeyboardDevice->LeftCtrlOn = FALSE;
UsbKeyboardDevice->LeftAltOn = FALSE;
UsbKeyboardDevice->LeftShiftOn = FALSE;
UsbKeyboardDevice->LeftLogoOn = FALSE;
UsbKeyboardDevice->RightCtrlOn = FALSE;
UsbKeyboardDevice->RightAltOn = FALSE;
UsbKeyboardDevice->RightShiftOn = FALSE;
UsbKeyboardDevice->RightLogoOn = FALSE;
UsbKeyboardDevice->MenuKeyOn = FALSE;
UsbKeyboardDevice->SysReqOn = FALSE;
UsbKeyboardDevice->AltGrOn = FALSE;
UsbKeyboardDevice->CurrentNsKey = NULL;
//
// Sync the initial state of lights on keyboard.
//
SetKeyLED (UsbKeyboardDevice);
ZeroMem (UsbKeyboardDevice->LastKeyCodeArray, sizeof (UINT8) * 8);
//
// Set a timer for repeat keys' generation.
//
if (UsbKeyboardDevice->RepeatTimer != NULL) {
gBS->CloseEvent (UsbKeyboardDevice->RepeatTimer);
UsbKeyboardDevice->RepeatTimer = NULL;
}
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
USBKeyboardRepeatHandler,
UsbKeyboardDevice,
&UsbKeyboardDevice->RepeatTimer
);
if (UsbKeyboardDevice->DelayedRecoveryEvent != NULL) {
gBS->CloseEvent (UsbKeyboardDevice->DelayedRecoveryEvent);
UsbKeyboardDevice->DelayedRecoveryEvent = NULL;
}
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
USBKeyboardRecoveryHandler,
UsbKeyboardDevice,
&UsbKeyboardDevice->DelayedRecoveryEvent
);
return EFI_SUCCESS;
}
/**
Handler function for USB keyboard's asynchronous interrupt transfer.
This function is the handler function for USB keyboard's asynchronous interrupt transfer
to manage the keyboard. It parses the USB keyboard input report, and inserts data to
keyboard buffer according to state of modifer keys and normal keys. Timer for repeat key
is also set accordingly.
@param Data A pointer to a buffer that is filled with key data which is
retrieved via asynchronous interrupt transfer.
@param DataLength Indicates the size of the data buffer.
@param Context Pointing to USB_KB_DEV instance.
@param Result Indicates the result of the asynchronous interrupt transfer.
@retval EFI_SUCCESS Asynchronous interrupt transfer is handled successfully.
@retval EFI_DEVICE_ERROR Hardware error occurs.
**/
EFI_STATUS
EFIAPI
KeyboardHandler (
IN VOID *Data,
IN UINTN DataLength,
IN VOID *Context,
IN UINT32 Result
)
{
USB_KB_DEV *UsbKeyboardDevice;
EFI_USB_IO_PROTOCOL *UsbIo;
UINT8 *CurKeyCodeBuffer;
UINT8 *OldKeyCodeBuffer;
UINT8 CurModifierMap;
UINT8 OldModifierMap;
UINT8 Mask;
UINT8 Index;
UINT8 Index2;
BOOLEAN Down;
BOOLEAN KeyRelease;
BOOLEAN KeyPress;
UINT8 SavedTail;
USB_KEY UsbKey;
UINT8 NewRepeatKey;
UINT32 UsbStatus;
EFI_KEY_DESCRIPTOR *KeyDescriptor;
ASSERT (Context != NULL);
NewRepeatKey = 0;
UsbKeyboardDevice = (USB_KB_DEV *) Context;
UsbIo = UsbKeyboardDevice->UsbIo;
//
// Analyzes Result and performs corresponding action.
//
if (Result != EFI_USB_NOERROR) {
//
// Some errors happen during the process
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
PcdGet32 (PcdStatusCodeValueKeyboardInputError),
UsbKeyboardDevice->DevicePath
);
//
// Stop the repeat key generation if any
//
UsbKeyboardDevice->RepeatKey = 0;
gBS->SetTimer (
UsbKeyboardDevice->RepeatTimer,
TimerCancel,
USBKBD_REPEAT_RATE
);
if ((Result & EFI_USB_ERR_STALL) == EFI_USB_ERR_STALL) {
UsbClearEndpointHalt (
UsbIo,
UsbKeyboardDevice->IntEndpointDescriptor.EndpointAddress,
&UsbStatus
);
}
//
// Delete & Submit this interrupt again
// Handler of DelayedRecoveryEvent triggered by timer will re-submit the interrupt.
//
UsbIo->UsbAsyncInterruptTransfer (
UsbIo,
UsbKeyboardDevice->IntEndpointDescriptor.EndpointAddress,
FALSE,
0,
0,
NULL,
NULL
);
//
// EFI_USB_INTERRUPT_DELAY is defined in USB standard for error handling.
//
gBS->SetTimer (
UsbKeyboardDevice->DelayedRecoveryEvent,
TimerRelative,
EFI_USB_INTERRUPT_DELAY
);
return EFI_DEVICE_ERROR;
}
//
// If no error and no data, just return EFI_SUCCESS.
//
if (DataLength == 0 || Data == NULL) {
return EFI_SUCCESS;
}
//
// Following code checks current keyboard input report against old key code buffer.
// According to USB HID Firmware Specification, the report consists of 8 bytes.
// Byte 0 is map of Modifier keys.
// Byte 1 is reserved.
// Bytes 2 to 7 are keycodes.
//
CurKeyCodeBuffer = (UINT8 *) Data;
OldKeyCodeBuffer = UsbKeyboardDevice->LastKeyCodeArray;
//
// Checks for new key stroke.
//
for (Index = 0; Index < 8; Index++) {
if (OldKeyCodeBuffer[Index] != CurKeyCodeBuffer[Index]) {
break;
}
}
//
// If no new key, return EFI_SUCCESS immediately.
//
if (Index == 8) {
return EFI_SUCCESS;
}
//
// Parse the modifier key, which is the first byte of keyboard input report.
//
CurModifierMap = CurKeyCodeBuffer[0];
OldModifierMap = OldKeyCodeBuffer[0];
//
// Handle modifier key's pressing or releasing situation.
// According to USB HID Firmware spec, Byte 0 uses folloing map of Modifier keys:
// Bit0: Left Control, Keycode: 0xe0
// Bit1: Left Shift, Keycode: 0xe1
// Bit2: Left Alt, Keycode: 0xe2
// Bit3: Left GUI, Keycode: 0xe3
// Bit4: Right Control, Keycode: 0xe4
// Bit5: Right Shift, Keycode: 0xe5
// Bit6: Right Alt, Keycode: 0xe6
// Bit7: Right GUI, Keycode: 0xe7
//
for (Index = 0; Index < 8; Index++) {
Mask = (UINT8) (1 << Index);
if ((CurModifierMap & Mask) != (OldModifierMap & Mask)) {
//
// If current modifier key is up, then CurModifierMap & Mask = 0;
// 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);
}
}
//
// Handle normal key's releasing situation
// Bytes 2 to 7 are for normal keycodes
//
KeyRelease = FALSE;
for (Index = 2; Index < 8; Index++) {
if (!USBKBD_VALID_KEYCODE (OldKeyCodeBuffer[Index])) {
continue;
}
//
// For any key in old keycode buffer, if it is not in current keycode buffer,
// then it is released. Otherwise, it is not released.
//
KeyRelease = TRUE;
for (Index2 = 2; Index2 < 8; Index2++) {
if (!USBKBD_VALID_KEYCODE (CurKeyCodeBuffer[Index2])) {
continue;
}
if (OldKeyCodeBuffer[Index] == CurKeyCodeBuffer[Index2]) {
KeyRelease = FALSE;
break;
}
}
if (KeyRelease) {
InsertKeyCode (
&(UsbKeyboardDevice->KeyboardBuffer),
OldKeyCodeBuffer[Index],
FALSE
);
//
// The original repeat key is released.
//
if (OldKeyCodeBuffer[Index] == UsbKeyboardDevice->RepeatKey) {
UsbKeyboardDevice->RepeatKey = 0;
}
}
}
//
// If original repeat key is released, cancel the repeat timer
//
if (UsbKeyboardDevice->RepeatKey == 0) {
gBS->SetTimer (
UsbKeyboardDevice->RepeatTimer,
TimerCancel,
USBKBD_REPEAT_RATE
);
}
//
// Handle normal key's pressing situation
//
KeyPress = FALSE;
for (Index = 2; Index < 8; Index++) {
if (!USBKBD_VALID_KEYCODE (CurKeyCodeBuffer[Index])) {
continue;
}
//
// For any key in current keycode buffer, if it is not in old keycode buffer,
// then it is pressed. Otherwise, it is not pressed.
//
KeyPress = TRUE;
for (Index2 = 2; Index2 < 8; Index2++) {
if (!USBKBD_VALID_KEYCODE (OldKeyCodeBuffer[Index2])) {
continue;
}
if (CurKeyCodeBuffer[Index] == OldKeyCodeBuffer[Index2]) {
KeyPress = FALSE;
break;
}
}
if (KeyPress) {
InsertKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), CurKeyCodeBuffer[Index], TRUE);
//
// Handle repeat key
//
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, CurKeyCodeBuffer[Index]);
if (KeyDescriptor->Modifier == EFI_NUM_LOCK_MODIFIER || KeyDescriptor->Modifier == EFI_CAPS_LOCK_MODIFIER) {
//
// For NumLock or CapsLock pressed, there is no need to handle repeat key for them.
//
UsbKeyboardDevice->RepeatKey = 0;
} else {
//
// Prepare new repeat key, and clear the original one.
//
NewRepeatKey = CurKeyCodeBuffer[Index];
UsbKeyboardDevice->RepeatKey = 0;
}
}
}
//
// Update LastKeycodeArray buffer in the UsbKeyboardDevice data structure.
//
for (Index = 0; Index < 8; Index++) {
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);
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
//
if (NewRepeatKey != 0) {
//
// Sets trigger time to "Repeat Delay Time",
// to trigger the repeat timer when the key is hold long
// enough time.
//
gBS->SetTimer (
UsbKeyboardDevice->RepeatTimer,
TimerRelative,
USBKBD_REPEAT_DELAY
);
UsbKeyboardDevice->RepeatKey = NewRepeatKey;
}
return EFI_SUCCESS;
}
/**
Retrieves a USB keycode after parsing the raw data in keyboard buffer.
This function parses keyboard buffer. It updates state of modifier key for
USB_KB_DEV instancem, and returns keycode for output.
@param UsbKeyboardDevice The USB_KB_DEV instance.
@param KeyCode Pointer to the USB keycode for output.
@retval EFI_SUCCESS Keycode successfully parsed.
@retval EFI_NOT_READY Keyboard buffer is not ready for a valid keycode
**/
EFI_STATUS
EFIAPI
USBParseKey (
IN OUT USB_KB_DEV *UsbKeyboardDevice,
OUT UINT8 *KeyCode
)
{
USB_KEY UsbKey;
EFI_KEY_DESCRIPTOR *KeyDescriptor;
*KeyCode = 0;
while (!IsUSBKeyboardBufferEmpty (&UsbKeyboardDevice->KeyboardBuffer)) {
//
// Pops one raw data off.
//
RemoveKeyCode (&(UsbKeyboardDevice->KeyboardBuffer), &UsbKey);
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, UsbKey.KeyCode);
if (!UsbKey.Down) {
//
// Key is released.
//
switch (KeyDescriptor->Modifier) {
//
// Ctrl release
//
case EFI_LEFT_CONTROL_MODIFIER:
UsbKeyboardDevice->LeftCtrlOn = FALSE;
UsbKeyboardDevice->CtrlOn = FALSE;
break;
case EFI_RIGHT_CONTROL_MODIFIER:
UsbKeyboardDevice->RightCtrlOn = FALSE;
UsbKeyboardDevice->CtrlOn = FALSE;
break;
//
// Shift release
//
case EFI_LEFT_SHIFT_MODIFIER:
UsbKeyboardDevice->LeftShiftOn = FALSE;
UsbKeyboardDevice->ShiftOn = FALSE;
break;
case EFI_RIGHT_SHIFT_MODIFIER:
UsbKeyboardDevice->RightShiftOn = FALSE;
UsbKeyboardDevice->ShiftOn = FALSE;
break;
//
// Alt release
//
case EFI_LEFT_ALT_MODIFIER:
UsbKeyboardDevice->LeftAltOn = FALSE;
UsbKeyboardDevice->AltOn = FALSE;
break;
case EFI_RIGHT_ALT_MODIFIER:
UsbKeyboardDevice->RightAltOn = FALSE;
UsbKeyboardDevice->AltOn = FALSE;
break;
//
// Left Logo release
//
case EFI_LEFT_LOGO_MODIFIER:
UsbKeyboardDevice->LeftLogoOn = FALSE;
break;
//
// Right Logo release
//
case EFI_RIGHT_LOGO_MODIFIER:
UsbKeyboardDevice->RightLogoOn = FALSE;
break;
//
// Menu key release
//
case EFI_MENU_MODIFIER:
UsbKeyboardDevice->MenuKeyOn = FALSE;
break;
//
// SysReq release
//
case EFI_PRINT_MODIFIER:
case EFI_SYS_REQUEST_MODIFIER:
UsbKeyboardDevice->SysReqOn = FALSE;
break;
//
// AltGr release
//
case EFI_ALT_GR_MODIFIER:
UsbKeyboardDevice->AltGrOn = FALSE;
break;
default:
break;
}
continue;
}
//
// Analyzes key pressing situation
//
switch (KeyDescriptor->Modifier) {
//
// Ctrl press
//
case EFI_LEFT_CONTROL_MODIFIER:
UsbKeyboardDevice->LeftCtrlOn = TRUE;
UsbKeyboardDevice->CtrlOn = TRUE;
continue;
break;
case EFI_RIGHT_CONTROL_MODIFIER:
UsbKeyboardDevice->RightCtrlOn = TRUE;
UsbKeyboardDevice->CtrlOn = TRUE;
continue;
break;
//
// Shift press
//
case EFI_LEFT_SHIFT_MODIFIER:
UsbKeyboardDevice->LeftShiftOn = TRUE;
UsbKeyboardDevice->ShiftOn = TRUE;
continue;
break;
case EFI_RIGHT_SHIFT_MODIFIER:
UsbKeyboardDevice->RightShiftOn = TRUE;
UsbKeyboardDevice->ShiftOn = TRUE;
continue;
break;
//
// Alt press
//
case EFI_LEFT_ALT_MODIFIER:
UsbKeyboardDevice->LeftAltOn = TRUE;
UsbKeyboardDevice->AltOn = TRUE;
continue;
break;
case EFI_RIGHT_ALT_MODIFIER:
UsbKeyboardDevice->RightAltOn = TRUE;
UsbKeyboardDevice->AltOn = TRUE;
continue;
break;
//
// Left Logo press
//
case EFI_LEFT_LOGO_MODIFIER:
UsbKeyboardDevice->LeftLogoOn = TRUE;
break;
//
// Right Logo press
//
case EFI_RIGHT_LOGO_MODIFIER:
UsbKeyboardDevice->RightLogoOn = TRUE;
break;
//
// Menu key press
//
case EFI_MENU_MODIFIER:
UsbKeyboardDevice->MenuKeyOn = TRUE;
break;
//
// SysReq press
//
case EFI_PRINT_MODIFIER:
case EFI_SYS_REQUEST_MODIFIER:
UsbKeyboardDevice->SysReqOn = TRUE;
continue;
break;
//
// AltGr press
//
case EFI_ALT_GR_MODIFIER:
UsbKeyboardDevice->AltGrOn = TRUE;
break;
case EFI_NUM_LOCK_MODIFIER:
//
// Toggle NumLock
//
UsbKeyboardDevice->NumLockOn = (BOOLEAN) (!(UsbKeyboardDevice->NumLockOn));
SetKeyLED (UsbKeyboardDevice);
continue;
break;
case EFI_CAPS_LOCK_MODIFIER:
//
// Toggle CapsLock
//
UsbKeyboardDevice->CapsOn = (BOOLEAN) (!(UsbKeyboardDevice->CapsOn));
SetKeyLED (UsbKeyboardDevice);
continue;
break;
case EFI_SCROLL_LOCK_MODIFIER:
//
// Toggle ScrollLock
//
UsbKeyboardDevice->ScrollOn = (BOOLEAN) (!(UsbKeyboardDevice->ScrollOn));
SetKeyLED (UsbKeyboardDevice);
continue;
break;
//
// F11, F12, PrintScreen, Pause/Break
// could not be retrieved via SimpleTextInEx protocol
//
case EFI_FUNCTION_KEY_ELEVEN_MODIFIER:
case EFI_FUNCTION_KEY_TWELVE_MODIFIER:
case EFI_PAUSE_MODIFIER:
case EFI_BREAK_MODIFIER:
//
// Fall through
//
continue;
break;
default:
break;
}
//
// When encountering Ctrl + Alt + Del, then warm reset.
//
if (KeyDescriptor->Modifier == EFI_DELETE_MODIFIER) {
if ((UsbKeyboardDevice->CtrlOn) && (UsbKeyboardDevice->AltOn)) {
gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
}
*KeyCode = UsbKey.KeyCode;
return EFI_SUCCESS;
}
return EFI_NOT_READY;
}
/**
Converts USB Keycode ranging from 0x4 to 0x65 to EFI_INPUT_KEY.
@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
the keystroke information for the key that
was pressed.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER KeyCode is not in the range of 0x4 to 0x65.
@retval EFI_INVALID_PARAMETER Translated EFI_INPUT_KEY has zero for both ScanCode and UnicodeChar.
@retval EFI_NOT_READY KeyCode represents a dead key with EFI_NS_KEY_MODIFIER
**/
EFI_STATUS
EFIAPI
UsbKeyCodeToEfiInputKey (
IN USB_KB_DEV *UsbKeyboardDevice,
IN UINT8 KeyCode,
OUT EFI_INPUT_KEY *Key
)
{
EFI_KEY_DESCRIPTOR *KeyDescriptor;
//
// KeyCode must in the range of 0x4 to 0x65
//
if (!USBKBD_VALID_KEYCODE (KeyCode)) {
return EFI_INVALID_PARAMETER;
}
if ((KeyCode - 4) >= NUMBER_OF_VALID_NON_MODIFIER_USB_KEYCODE) {
return EFI_INVALID_PARAMETER;
}
KeyDescriptor = GetKeyDescriptor (UsbKeyboardDevice, KeyCode);
if (KeyDescriptor->Modifier == EFI_NS_KEY_MODIFIER) {
//
// If this is a dead key with EFI_NS_KEY_MODIFIER, then record it and return.
//
UsbKeyboardDevice->CurrentNsKey = FindUsbNsKey (UsbKeyboardDevice, KeyDescriptor);
return EFI_NOT_READY;
}
if (UsbKeyboardDevice->CurrentNsKey != NULL) {
//
// If this keystroke follows a non-spacing key, then find the descriptor for corresponding
// physical key.
//
KeyDescriptor = FindPhysicalKey (UsbKeyboardDevice->CurrentNsKey, KeyDescriptor);
UsbKeyboardDevice->CurrentNsKey = NULL;
}
Key->ScanCode = ModifierValueToEfiScanCodeConvertionTable[KeyDescriptor->Modifier];
Key->UnicodeChar = KeyDescriptor->Unicode;
if ((KeyDescriptor->AffectedAttribute & EFI_AFFECTED_BY_STANDARD_SHIFT)!= 0) {
if (UsbKeyboardDevice->ShiftOn) {
Key->UnicodeChar = KeyDescriptor->ShiftedUnicode;
//
// Need not return associated shift state if a class of printable characters that
// are normally adjusted by shift modifiers. e.g. Shift Key + 'f' key = 'F'
//
if ((KeyDescriptor->AffectedAttribute & EFI_AFFECTED_BY_CAPS_LOCK) != 0) {
UsbKeyboardDevice->LeftShiftOn = FALSE;
UsbKeyboardDevice->RightShiftOn = FALSE;
}
if (UsbKeyboardDevice->AltGrOn) {
Key->UnicodeChar = KeyDescriptor->ShiftedAltGrUnicode;
}
} else {
//
// Shift off
//
Key->UnicodeChar = KeyDescriptor->Unicode;
if (UsbKeyboardDevice->AltGrOn) {
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;
}
}
}
//
// 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) {
//
// For key affected by NumLock, if NumLock is on and Shift is not pressed, then it means
// normal key, instead of original control key. So the ScanCode should be cleaned.
// 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;
} else {
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;
}
//
// Not valid for key without both unicode key code and EFI Scan Code.
//
if (Key->UnicodeChar == 0 && Key->ScanCode == SCAN_NULL) {
return EFI_NOT_READY;
}
//
// Save Shift/Toggle state
//
if (UsbKeyboardDevice->LeftCtrlOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_CONTROL_PRESSED;
}
if (UsbKeyboardDevice->RightCtrlOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_CONTROL_PRESSED;
}
if (UsbKeyboardDevice->LeftAltOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_ALT_PRESSED;
}
if (UsbKeyboardDevice->RightAltOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_ALT_PRESSED;
}
if (UsbKeyboardDevice->LeftShiftOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_SHIFT_PRESSED;
}
if (UsbKeyboardDevice->RightShiftOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_SHIFT_PRESSED;
}
if (UsbKeyboardDevice->LeftLogoOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_LEFT_LOGO_PRESSED;
}
if (UsbKeyboardDevice->RightLogoOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_RIGHT_LOGO_PRESSED;
}
if (UsbKeyboardDevice->MenuKeyOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_MENU_KEY_PRESSED;
}
if (UsbKeyboardDevice->SysReqOn) {
UsbKeyboardDevice->KeyState.KeyShiftState |= EFI_SYS_REQ_PRESSED;
}
if (UsbKeyboardDevice->ScrollOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_SCROLL_LOCK_ACTIVE;
}
if (UsbKeyboardDevice->NumLockOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_NUM_LOCK_ACTIVE;
}
if (UsbKeyboardDevice->CapsOn) {
UsbKeyboardDevice->KeyState.KeyToggleState |= EFI_CAPS_LOCK_ACTIVE;
}
return EFI_SUCCESS;
}
/**
Resets USB keyboard buffer.
@param KeyboardBuffer Points to the USB keyboard buffer.
**/
VOID
EFIAPI
InitUSBKeyBuffer (
OUT USB_KB_BUFFER *KeyboardBuffer
)
{
ZeroMem (KeyboardBuffer, sizeof (USB_KB_BUFFER));
KeyboardBuffer->BufferHead = KeyboardBuffer->BufferTail;
}
/**
Check whether USB keyboard buffer is empty.
@param KeyboardBuffer USB keyboard buffer
@retval TRUE Keyboard buffer is empty.
@retval FALSE Keyboard buffer is not empty.
**/
BOOLEAN
EFIAPI
IsUSBKeyboardBufferEmpty (
IN USB_KB_BUFFER *KeyboardBuffer
)
{
//
// Meet FIFO empty condition
//
return (BOOLEAN) (KeyboardBuffer->BufferHead == KeyboardBuffer->BufferTail);
}
/**
Check whether USB keyboard buffer is full.
@param KeyboardBuffer USB keyboard buffer
@retval TRUE Keyboard buffer is full.
@retval FALSE Keyboard buffer is not full.
**/
BOOLEAN
EFIAPI
IsUSBKeyboardBufferFull (
IN USB_KB_BUFFER *KeyboardBuffer
)
{
return (BOOLEAN)(((KeyboardBuffer->BufferTail + 1) % (MAX_KEY_ALLOWED + 1)) == KeyboardBuffer->BufferHead);
}
/**
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.
**/
VOID
EFIAPI
InsertKeyCode (
IN OUT USB_KB_BUFFER *KeyboardBuffer,
IN UINT8 Key,
IN BOOLEAN Down
)
{
USB_KEY UsbKey;
//
// If keyboard buffer is full, throw the
// first key out of the keyboard buffer.
//
if (IsUSBKeyboardBufferFull (KeyboardBuffer)) {
RemoveKeyCode (KeyboardBuffer, &UsbKey);
}
KeyboardBuffer->Buffer[KeyboardBuffer->BufferTail].KeyCode = Key;
KeyboardBuffer->Buffer[KeyboardBuffer->BufferTail].Down = Down;
//
// Adjust the tail pointer of the FIFO keyboard buffer.
//
KeyboardBuffer->BufferTail = (UINT8) ((KeyboardBuffer->BufferTail + 1) % (MAX_KEY_ALLOWED + 1));
}
/**
Remove a keycode from keyboard buffer and return it.
@param KeyboardBuffer Points to the USB keyboard buffer.
@param UsbKey Points to the buffer that contains keycode for output.
@retval EFI_SUCCESS Keycode successfully removed from keyboard buffer.
@retval EFI_DEVICE_ERROR Keyboard buffer is empty.
**/
EFI_STATUS
EFIAPI
RemoveKeyCode (
IN OUT USB_KB_BUFFER *KeyboardBuffer,
OUT USB_KEY *UsbKey
)
{
if (IsUSBKeyboardBufferEmpty (KeyboardBuffer)) {
return EFI_DEVICE_ERROR;
}
UsbKey->KeyCode = KeyboardBuffer->Buffer[KeyboardBuffer->BufferHead].KeyCode;
UsbKey->Down = KeyboardBuffer->Buffer[KeyboardBuffer->BufferHead].Down;
//
// Adjust the head pointer of the FIFO keyboard buffer.
//
KeyboardBuffer->BufferHead = (UINT8) ((KeyboardBuffer->BufferHead + 1) % (MAX_KEY_ALLOWED + 1));
return EFI_SUCCESS;
}
/**
Sets USB keyboard LED state.
@param UsbKeyboardDevice The USB_KB_DEV instance.
**/
VOID
EFIAPI
SetKeyLED (
IN USB_KB_DEV *UsbKeyboardDevice
)
{
LED_MAP Led;
UINT8 ReportId;
//
// Set each field in Led map.
//
Led.NumLock = (UINT8) ((UsbKeyboardDevice->NumLockOn) ? 1 : 0);
Led.CapsLock = (UINT8) ((UsbKeyboardDevice->CapsOn) ? 1 : 0);
Led.ScrollLock = (UINT8) ((UsbKeyboardDevice->ScrollOn) ? 1 : 0);
Led.Resrvd = 0;
ReportId = 0;
//
// Call Set_Report Request to lighten the LED.
//
UsbSetReportRequest (
UsbKeyboardDevice->UsbIo,
UsbKeyboardDevice->InterfaceDescriptor.InterfaceNumber,
ReportId,
HID_OUTPUT_REPORT,
1,
(UINT8 *) &Led
);
}
/**
Handler for Repeat Key event.
This function is the handler for Repeat Key event triggered
by timer.
After a repeatable key is pressed, the event would be triggered
with interval of USBKBD_REPEAT_DELAY. Once the event is triggered,
following trigger will come with interval of USBKBD_REPEAT_RATE.
@param Event The Repeat Key event.
@param Context Points to the USB_KB_DEV instance.
**/
VOID
EFIAPI
USBKeyboardRepeatHandler (
IN EFI_EVENT Event,
IN VOID *Context
)
{
USB_KB_DEV *UsbKeyboardDevice;
UsbKeyboardDevice = (USB_KB_DEV *) Context;
//
// Do nothing when there is no repeat key.
//
if (UsbKeyboardDevice->RepeatKey != 0) {
//
// Inserts the repeat key into keyboard buffer,
//
InsertKeyCode (
&(UsbKeyboardDevice->KeyboardBuffer),
UsbKeyboardDevice->RepeatKey,
TRUE
);
//
// Set repeat rate for next repeat key generation.
//
gBS->SetTimer (
UsbKeyboardDevice->RepeatTimer,
TimerRelative,
USBKBD_REPEAT_RATE
);
}
}
/**
Handler for Delayed Recovery event.
This function is the handler for Delayed Recovery event triggered
by timer.
After a device error occurs, the event would be triggered
with interval of EFI_USB_INTERRUPT_DELAY. EFI_USB_INTERRUPT_DELAY
is defined in USB standard for error handling.
@param Event The Delayed Recovery event.
@param Context Points to the USB_KB_DEV instance.
**/
VOID
EFIAPI
USBKeyboardRecoveryHandler (
IN EFI_EVENT Event,
IN VOID *Context
)
{
USB_KB_DEV *UsbKeyboardDevice;
EFI_USB_IO_PROTOCOL *UsbIo;
UINT8 PacketSize;
UsbKeyboardDevice = (USB_KB_DEV *) Context;
UsbIo = UsbKeyboardDevice->UsbIo;
PacketSize = (UINT8) (UsbKeyboardDevice->IntEndpointDescriptor.MaxPacketSize);
//
// Re-submit Asynchronous Interrupt Transfer for recovery.
//
UsbIo->UsbAsyncInterruptTransfer (
UsbIo,
UsbKeyboardDevice->IntEndpointDescriptor.EndpointAddress,
TRUE,
UsbKeyboardDevice->IntEndpointDescriptor.Interval,
PacketSize,
KeyboardHandler,
UsbKeyboardDevice
);
}