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#include "ps2_keyboard.h"
#include <stdint.h>
#include <stdio.h>
#include <sys/io.h>
const uint8_t comm_port = 0x64; // r status register
// w command register
const uint8_t comm_enable_first_ps2 = 0xae;
const uint8_t comm_read_ctrl_config = 0x20;
const uint8_t comm_write_ctrl_config = 0x60;
const uint8_t data_port = 0x60; // rw
const uint8_t data_enable_scanning = 0xf4;
const char scancodes[] = {'E', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', '\b', 'T', 'q', 'w', 'e',
'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', 'C', 'a', 's', 'd', 'f', 'g', 'h', 'j',
'k', 'l', ';', '\'', '`', 'L', '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', 'R'};
void
ps2_keyboard_init()
{
// eat all previous keystrikes
while (inb(comm_port) & 0x1) inb(data_port);
outb(comm_port, comm_enable_first_ps2);
outb(comm_port, comm_read_ctrl_config);
const uint8_t conf = (inb(data_port) | 1) & ~0x10;
outb(comm_port, comm_write_ctrl_config);
outb(data_port, conf);
outb(data_port, data_enable_scanning);
}
void
ps2_keyboard_irq_handler()
{
const uint8_t key = inb(data_port);
if (key >= 0x80) return;
if (key < 0x37) printf("%c", scancodes[key - 1]);
else
printf("key pressed: %x\n", key);
}
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