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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[0x100] =
{
0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0x08, 0,
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 0, 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[0x100] =
{
0, 0, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 0, 0,
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', 0, '|',
'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
0, 0, 0, ' '
};
void Keyboard::emit(byte ch)
{
Key key;
key.character = ch;
key.modifiers = m_modifiers;
if (m_client)
m_client->onKeyPress(key);
m_queue.enqueue(key);
}
void Keyboard::handleIRQ()
{
while (IO::in8(0x64) & 1) {
byte ch = IO::in8(0x60);
switch (ch) {
case 0x38: m_modifiers |= Mod_Alt; break;
case 0xB8: m_modifiers &= ~Mod_Alt; break;
case 0x1D: m_modifiers |= Mod_Ctrl; break;
case 0x9D: m_modifiers &= ~Mod_Ctrl; break;
case 0x2A: m_modifiers |= Mod_Shift; break;
case 0xAA: m_modifiers &= ~Mod_Shift; break;
case 0x1C: /* enter */ emit('\n'); break;
case 0xFA: /* i8042 ack */ break;
default:
if (ch & 0x80) {
// key has been depressed
break;
}
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;
}
}
if (!m_modifiers)
emit(map[ch]);
else if (m_modifiers & Mod_Shift)
emit(shift_map[ch]);
else if (m_modifiers & Mod_Ctrl)
emit(map[ch]);
}
//break;
}
}
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);
enableIRQ();
}
Keyboard::~Keyboard()
{
}
bool Keyboard::hasDataAvailableForRead() const
{
return !m_queue.isEmpty();
}
ssize_t Keyboard::read(byte* buffer, size_t size)
{
ssize_t nread = 0;
while ((size_t)nread < size) {
if (m_queue.isEmpty())
break;
buffer[nread++] = m_queue.dequeue().character;
}
return nread;
}
ssize_t Keyboard::write(const byte*, size_t)
{
return 0;
}
KeyboardClient::~KeyboardClient()
{
}
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