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#include "types.h"
#include "i386.h"
#include "IO.h"
#include "PIC.h"
#include "Keyboard.h"
#include "VirtualConsole.h"
#include <AK/Assertions.h>
#define IRQ_KEYBOARD 1
#define I8042_BUFFER 0x60
#define I8042_STATUS 0x64
#define SET_LEDS 0xED
#define DATA_AVAILABLE 0x01
#define I8042_ACK 0xFA
#define MOD_ALT 1
#define MOD_CTRL 2
#define MOD_SHIFT 4
static char map[0x80] =
{
0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0x08, 0,
'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, ' '
};
static char shift_map[0x80] =
{
0, 0, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
'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, ' '
};
static KeyCode unshifted_key_map[0x80] =
{
Key_Invalid, Key_Invalid,
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_Invalid, //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_Shift,
Key_Backslash,
Key_Z, Key_X, Key_C, Key_V, Key_B, Key_N, Key_M, Key_Comma, Key_Period, Key_Slash,
Key_Alt,
Key_Invalid, Key_Invalid,
Key_Space
};
static KeyCode shifted_key_map[0x100] =
{
Key_Invalid, Key_Invalid,
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_Invalid,
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_Shift,
Key_Pipe,
Key_Z, Key_X, Key_C, Key_V, Key_B, Key_N, Key_M, Key_LessThan, Key_GreaterThan, Key_QuestionMark,
Key_Alt,
Key_Invalid, Key_Invalid,
Key_Space
};
void Keyboard::key_state_changed(byte raw, bool pressed)
{
Event event;
event.key = (m_modifiers & Mod_Shift) ? shifted_key_map[raw] : unshifted_key_map[raw];
event.character = (m_modifiers & Mod_Shift) ? shift_map[raw] : map[raw];
event.flags = m_modifiers;
if (pressed)
event.flags |= Is_Press;
if (m_client)
m_client->on_key_pressed(event);
m_queue.enqueue(event);
}
void Keyboard::handle_irq()
{
while (IO::in8(0x64) & 1) {
byte raw = IO::in8(0x60);
byte ch = raw & 0x7f;
bool pressed = !(raw & 0x80);
switch (ch) {
case 0x38: update_modifier(Mod_Alt, pressed); break;
case 0x1d: update_modifier(Mod_Ctrl, pressed); break;
case 0x2a: update_modifier(Mod_Shift, pressed); break;
case 0xfa: /* 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:
break;
}
}
key_state_changed(ch, pressed);
}
}
}
static Keyboard* s_the;
Keyboard& Keyboard::the()
{
ASSERT(s_the);
return *s_the;
}
Keyboard::Keyboard()
: IRQHandler(IRQ_KEYBOARD)
, CharacterDevice(85, 1)
{
s_the = this;
// Empty the buffer of any pending data.
// I don't care what you've been pressing until now!
while (IO::in8(I8042_STATUS ) & DATA_AVAILABLE)
IO::in8(I8042_BUFFER);
enable_irq();
}
Keyboard::~Keyboard()
{
}
bool Keyboard::can_read(Process&) const
{
return !m_queue.is_empty();
}
ssize_t Keyboard::read(Process&, byte* buffer, size_t size)
{
ssize_t nread = 0;
while ((size_t)nread < size) {
if (m_queue.is_empty())
break;
// Don't return partial data frames.
if ((size - nread) < sizeof(Event))
break;
auto event = m_queue.dequeue();
memcpy(buffer, &event, sizeof(Event));
nread += sizeof(Event);
}
return nread;
}
ssize_t Keyboard::write(Process&, const byte*, size_t)
{
return 0;
}
KeyboardClient::~KeyboardClient()
{
}
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