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ladybird/Kernel/Devices/KeyboardDevice.cpp
Hüseyin ASLITÜRK 794ca16cca Kernel: Implement the setkeymap() syscall.
2019-11-25 11:53:02 +01:00

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#include <AK/Assertions.h>
#include <AK/Types.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Arch/i386/PIC.h>
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <Kernel/IO.h>
//#define KEYBOARD_DEBUG
#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;
static 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 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 char numpad_map[13] = { '7', '8', '9', 0, '4', '5', '6', 0, '1', '2', '3', '0', ',' };
static 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 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 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] : 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()
{
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
dbgprintf("Keyboard::handle_irq: %b %s\n", ch, pressed ? "down" : "up");
#endif
switch (ch) {
case 0x38:
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);
// 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&) const
{
return !m_queue.is_empty();
}
ssize_t KeyboardDevice::read(FileDescription&, 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&, const u8*, ssize_t)
{
return 0;
}
KeyboardClient::~KeyboardClient()
{
}
void KeyboardDevice::set_maps(char* n_map, char* n_shift_map, char* n_alt_map)
{
kfree(map);
kfree(shift_map);
kfree(alt_map);
map = (char*) kmalloc(0x80);
shift_map = (char*) kmalloc(0x80);
alt_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];
}
}
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