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ladybird/Kernel/Devices/KeyboardDevice.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Assertions.h>
#include <AK/ByteBuffer.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <LibBareMetal/IO.h>
//#define KEYBOARD_DEBUG
namespace Kernel {
#define IRQ_KEYBOARD 1
#define I8042_BUFFER 0x60
#define I8042_STATUS 0x64
#define I8042_ACK 0xFA
#define I8042_BUFFER_FULL 0x01
#define I8042_WHICH_BUFFER 0x20
#define I8042_MOUSE_BUFFER 0x20
#define I8042_KEYBOARD_BUFFER 0x00
char* map;
char* shift_map;
char* alt_map;
char* altgr_map;
static const char en_map[0x80] = {
0,
'\033',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'0',
'-',
'=',
0x08,
'\t',
'q',
'w',
'e',
'r',
't',
'y',
'u',
'i',
'o',
'p',
'[',
']',
'\n',
0,
'a',
's',
'd',
'f',
'g',
'h',
'j',
'k',
'l',
';',
'\'',
'`',
0,
'\\',
'z',
'x',
'c',
'v',
'b',
'n',
'm',
',',
'.',
'/',
0,
'*',
0,
' ',
0,
0,
//60
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
//70
0,
0,
0,
0,
'-',
0,
0,
0,
'+',
0,
//80
0,
0,
0,
0,
0,
0,
'\\',
0,
0,
0,
};
static const char en_shift_map[0x80] = {
0,
'\033',
'!',
'@',
'#',
'$',
'%',
'^',
'&',
'*',
'(',
')',
'_',
'+',
0x08,
'\t',
'Q',
'W',
'E',
'R',
'T',
'Y',
'U',
'I',
'O',
'P',
'{',
'}',
'\n',
0,
'A',
'S',
'D',
'F',
'G',
'H',
'J',
'K',
'L',
':',
'"',
'~',
0,
'|',
'Z',
'X',
'C',
'V',
'B',
'N',
'M',
'<',
'>',
'?',
0,
'*',
0,
' ',
0,
0,
//60
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
//70
0,
0,
0,
0,
'-',
0,
0,
0,
'+',
0,
//80
0,
0,
0,
0,
0,
0,
'|',
0,
0,
0,
};
static const char numpad_map[13] = { '7', '8', '9', 0, '4', '5', '6', 0, '1', '2', '3', '0', ',' };
static const KeyCode unshifted_key_map[0x80] = {
Key_Invalid,
Key_Escape,
Key_1,
Key_2,
Key_3,
Key_4,
Key_5,
Key_6,
Key_7,
Key_8,
Key_9,
Key_0,
Key_Minus,
Key_Equal,
Key_Backspace,
Key_Tab, //15
Key_Q,
Key_W,
Key_E,
Key_R,
Key_T,
Key_Y,
Key_U,
Key_I,
Key_O,
Key_P,
Key_LeftBracket,
Key_RightBracket,
Key_Return, // 28
Key_Control, // 29
Key_A,
Key_S,
Key_D,
Key_F,
Key_G,
Key_H,
Key_J,
Key_K,
Key_L,
Key_Semicolon,
Key_Apostrophe,
Key_Backtick,
Key_LeftShift, // 42
Key_Backslash,
Key_Z,
Key_X,
Key_C,
Key_V,
Key_B,
Key_N,
Key_M,
Key_Comma,
Key_Period,
Key_Slash,
Key_RightShift, // 54
Key_Asterisk,
Key_Alt, // 56
Key_Space, // 57
Key_CapsLock, // 58
Key_F1,
Key_F2,
Key_F3,
Key_F4,
Key_F5,
Key_F6,
Key_F7,
Key_F8,
Key_F9,
Key_F10,
Key_NumLock,
Key_Invalid, // 70
Key_Home,
Key_Up,
Key_PageUp,
Key_Minus,
Key_Left,
Key_Invalid,
Key_Right, // 77
Key_Plus,
Key_End,
Key_Down, // 80
Key_PageDown,
Key_Invalid,
Key_Delete, // 83
Key_Invalid,
Key_Invalid,
Key_Backslash,
Key_F11,
Key_F12,
Key_Invalid,
Key_Invalid,
Key_Logo,
};
static const KeyCode shifted_key_map[0x100] = {
Key_Invalid,
Key_Escape,
Key_ExclamationPoint,
Key_AtSign,
Key_Hashtag,
Key_Dollar,
Key_Percent,
Key_Circumflex,
Key_Ampersand,
Key_Asterisk,
Key_LeftParen,
Key_RightParen,
Key_Underscore,
Key_Plus,
Key_Backspace,
Key_Tab,
Key_Q,
Key_W,
Key_E,
Key_R,
Key_T,
Key_Y,
Key_U,
Key_I,
Key_O,
Key_P,
Key_LeftBrace,
Key_RightBrace,
Key_Return,
Key_Control,
Key_A,
Key_S,
Key_D,
Key_F,
Key_G,
Key_H,
Key_J,
Key_K,
Key_L,
Key_Colon,
Key_DoubleQuote,
Key_Tilde,
Key_LeftShift, // 42
Key_Pipe,
Key_Z,
Key_X,
Key_C,
Key_V,
Key_B,
Key_N,
Key_M,
Key_LessThan,
Key_GreaterThan,
Key_QuestionMark,
Key_RightShift, // 54
Key_Asterisk,
Key_Alt,
Key_Space, // 57
Key_CapsLock, // 58
Key_F1,
Key_F2,
Key_F3,
Key_F4,
Key_F5,
Key_F6,
Key_F7,
Key_F8,
Key_F9,
Key_F10,
Key_NumLock,
Key_Invalid, // 70
Key_Home,
Key_Up,
Key_PageUp,
Key_Minus,
Key_Left,
Key_Invalid,
Key_Right, // 77
Key_Plus,
Key_End,
Key_Down, // 80
Key_PageDown,
Key_Invalid,
Key_Delete, // 83
Key_Invalid,
Key_Invalid,
Key_Pipe,
Key_F11,
Key_F12,
Key_Invalid,
Key_Invalid,
Key_Logo,
};
static const KeyCode numpad_key_map[13] = { Key_7, Key_8, Key_9, Key_Invalid, Key_4, Key_5, Key_6, Key_Invalid, Key_1, Key_2, Key_3, Key_0, Key_Comma };
void KeyboardDevice::key_state_changed(u8 raw, bool pressed)
{
KeyCode key = (m_modifiers & Mod_Shift) ? shifted_key_map[raw] : unshifted_key_map[raw];
char character = (m_modifiers & Mod_Shift) ? shift_map[raw] : (m_modifiers & Mod_Alt) ? alt_map[raw] : (m_modifiers & Mod_AltGr) ? altgr_map[raw] : map[raw];
if (key == Key_NumLock && pressed)
m_num_lock_on = !m_num_lock_on;
if (m_num_lock_on && !m_has_e0_prefix) {
if (raw >= 0x47 && raw <= 0x53) {
u8 index = raw - 0x47;
KeyCode newKey = numpad_key_map[index];
if (newKey != Key_Invalid) {
key = newKey;
character = numpad_map[index];
}
}
} else {
if (m_has_e0_prefix) {
if (key == Key_Slash) {
character = '/'; // On Turkish-QWERTY Keyboard Key_Slash mapped to '.' char, if e0 prefix is true remap to '/' char
}
}
}
if (key == Key_CapsLock && pressed)
m_caps_lock_on = !m_caps_lock_on;
if (m_caps_lock_on && (m_modifiers == 0 || m_modifiers == Mod_Shift)) {
if (character >= 'a' && character <= 'z')
character &= ~0x20;
else if (character >= 'A' && character <= 'Z')
character |= 0x20;
}
Event event;
event.key = key;
event.character = static_cast<u8>(character);
event.flags = m_modifiers;
if (pressed)
event.flags |= Is_Press;
if (m_client)
m_client->on_key_pressed(event);
m_queue.enqueue(event);
m_has_e0_prefix = false;
}
void KeyboardDevice::handle_irq(const RegisterState&)
{
for (;;) {
u8 status = IO::in8(I8042_STATUS);
if (!(((status & I8042_WHICH_BUFFER) == I8042_KEYBOARD_BUFFER) && (status & I8042_BUFFER_FULL)))
return;
u8 raw = IO::in8(I8042_BUFFER);
u8 ch = raw & 0x7f;
bool pressed = !(raw & 0x80);
if (raw == 0xe0) {
m_has_e0_prefix = true;
return;
}
#ifdef KEYBOARD_DEBUG
dbg() << "Keyboard::handle_irq: " << String::format("%b", ch) << " " << (pressed ? "down" : "up");
#endif
switch (ch) {
case 0x38:
if (m_has_e0_prefix)
update_modifier(Mod_AltGr, pressed);
else
update_modifier(Mod_Alt, pressed);
break;
case 0x1d:
update_modifier(Mod_Ctrl, pressed);
break;
case 0x5b:
update_modifier(Mod_Logo, pressed);
break;
case 0x2a:
case 0x36:
update_modifier(Mod_Shift, pressed);
break;
}
switch (ch) {
case I8042_ACK:
break;
default:
if (m_modifiers & Mod_Alt) {
switch (map[ch]) {
case '1':
case '2':
case '3':
case '4':
VirtualConsole::switch_to(map[ch] - '0' - 1);
break;
default:
key_state_changed(ch, pressed);
break;
}
} else {
key_state_changed(ch, pressed);
}
}
}
}
static KeyboardDevice* s_the;
KeyboardDevice& KeyboardDevice::the()
{
ASSERT(s_the);
return *s_the;
}
KeyboardDevice::KeyboardDevice()
: IRQHandler(IRQ_KEYBOARD)
, CharacterDevice(85, 1)
{
s_the = this;
KeyboardDevice::set_maps(en_map, en_shift_map, en_map, en_map);
// Empty the buffer of any pending data.
// I don't care what you've been pressing until now!
while (IO::in8(I8042_STATUS) & I8042_BUFFER_FULL)
IO::in8(I8042_BUFFER);
enable_irq();
}
KeyboardDevice::~KeyboardDevice()
{
}
bool KeyboardDevice::can_read(const FileDescription&, size_t) const
{
return !m_queue.is_empty();
}
ssize_t KeyboardDevice::read(FileDescription&, size_t, u8* buffer, ssize_t size)
{
ssize_t nread = 0;
while (nread < size) {
if (m_queue.is_empty())
break;
// Don't return partial data frames.
if ((size - nread) < (ssize_t)sizeof(Event))
break;
auto event = m_queue.dequeue();
memcpy(buffer, &event, sizeof(Event));
nread += sizeof(Event);
}
return nread;
}
ssize_t KeyboardDevice::write(FileDescription&, size_t, const u8*, ssize_t)
{
return 0;
}
KeyboardClient::~KeyboardClient()
{
}
void KeyboardDevice::set_maps(const char* n_map, const char* n_shift_map, const char* n_alt_map, const char* n_altgr_map)
{
kfree(map);
kfree(shift_map);
kfree(alt_map);
kfree(altgr_map);
map = (char*)kmalloc(0x80);
shift_map = (char*)kmalloc(0x80);
alt_map = (char*)kmalloc(0x80);
altgr_map = (char*)kmalloc(0x80);
for (int i = 0; i < 0x80; i++) {
map[i] = n_map[i];
shift_map[i] = n_shift_map[i];
alt_map[i] = n_alt_map[i];
altgr_map[i] = n_altgr_map[i];
}
}
}
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