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#include "types.h"
#include "i386.h"
#include "IO.h"
#include "VGA.h"
#include "PIC.h"
#include "Keyboard.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::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 */ m_queue.enqueue('\n'); break;
case 0xFA: /* i8042 ack */ break;
default:
if (ch & 0x80) {
// key has been depressed
break;
}
if (!m_modifiers)
m_queue.enqueue(map[ch]);
else if (m_modifiers & MOD_SHIFT)
m_queue.enqueue(shift_map[ch]);
else if (m_modifiers & MOD_CTRL) {
// FIXME: This is obviously not a good enough way to process ctrl+whatever.
m_queue.enqueue('^');
m_queue.enqueue(shift_map[ch]);
}
}
//break;
}
}
Keyboard::Keyboard()
: IRQHandler(IRQ_KEYBOARD)
{
// 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()
{
ASSERT_NOT_REACHED();
}
bool Keyboard::hasDataAvailableForRead() const
{
return !m_queue.isEmpty();
}
ssize_t Keyboard::read(byte* buffer, size_t size)
{
ssize_t nread = 0;
while (nread < size) {
if (m_queue.isEmpty())
break;
buffer[nread++] = m_queue.dequeue();
}
return nread;
}
ssize_t Keyboard::write(const byte* data, size_t size)
{
return 0;
}
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