LCOM1920-T5G03

#include <lcom/lcf.h>

#include "keyboard.h"

#include "kbc.h"

#include "kbc_macros.h"

#include "utils.h"

int (subscribe_keyboard_interrupt)(uint8_t interrupt_bit, int *interrupt_id) {

    if (interrupt_id == NULL) return 1;

    *interrupt_id = interrupt_bit;

    return (sys_irqsetpolicy(KBC_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id));

}

int got_error_keyboard = 0;

int two_byte_scancode = 0;

void (kbc_ih)(void) {

    uint8_t status = 0;

    got_error_keyboard = 0;

    if (util_sys_inb(STATUS_REG, &status)) {

        got_error_keyboard = 1;

        return;

    }

    if (status & (TIME_OUT_REC | PARITY_ERROR)) {

        got_error_keyboard = 1;

        return;

    }

    uint8_t byte = 0;

    if (util_sys_inb(OUTPUT_BUF, &byte)) {

        got_error_keyboard = 1;

        return;

    }

    if (two_byte_scancode) {

        scancode[1] = byte;

        two_byte_scancode = 0;

    } else {

        scancode[0] = byte;

        two_byte_scancode = (byte == TWO_BYTE_CODE);

    }

}

int (keyboard_poll)(uint8_t bytes[], uint8_t *size){

    if(bytes == NULL || size == NULL) return 1;

    uint8_t c;

    if(kbc_read_byte(&c)) return 1;

    if(c == TWO_BYTE_CODE){

        if(kbc_read_byte(&bytes[1])) return 1;

        bytes[0] = c;

        *size = 2;

    }else{

        bytes[1] = 0;

        bytes[0] = c;

        *size = 1;

    }

    return 0;

}