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#include "keyboard.h"
#include <stdlib.h>
/*
* https://wiki.osdev.org/%228042%22_PS/2_Controller
* https://wiki.osdev.org/PS/2_Keyboard
*/
constexpr uint8_t comm_enable_first_ps2 = 0xae;
constexpr uint8_t comm_read_ctrl_config = 0x20;
constexpr uint8_t comm_write_ctrl_config = 0x60;
constexpr uint8_t dat_enable_scanning = 0xf4;
Keyboard::Keyboard() : InterruptHandler(0x01) {
// eat all previous keystrikes
while (commstatport.read() & 0x1) {
[[maybe_unused]] auto _c = dataport.read();
}
commstatport.write(comm_enable_first_ps2);
commstatport.write(comm_read_ctrl_config);
const uint8_t conf = (dataport.read() | 1) & ~0x10;
commstatport.write(comm_write_ctrl_config);
dataport.write(conf);
dataport.write(dat_enable_scanning);
}
cpu_state_t* Keyboard::trigger(cpu_state_t* cpu) {
const auto key = dataport.read();
if (key < 0x80) {
switch (key) {
case 0x04:
printk('3');
break;
case 0x05:
printk('4');
break;
case 0x06:
printk('5');
break;
case 0x07:
printk('6');
break;
case 0x08:
printk('7');
break;
case 0x09:
printk('8');
break;
case 0x0A:
printk('9');
break;
case 0x0B:
printk('0');
break;
case 0x10:
printk('q');
break;
case 0x11:
printk('w');
break;
case 0x12:
printk('e');
break;
case 0x13:
printk('r');
break;
case 0x14:
printk('t');
break;
case 0x15:
printk('y');
break;
case 0x16:
printk('u');
break;
case 0x17:
printk('i');
break;
case 0x18:
printk('o');
break;
case 0x19:
printk('p');
break;
case 0x1E:
printk('a');
break;
case 0x1F:
printk('s');
break;
case 0x20:
printk('d');
break;
case 0x21:
printk('f');
break;
case 0x22:
printk('g');
break;
case 0x23:
printk('h');
break;
case 0x24:
printk('j');
break;
case 0x25:
printk('k');
break;
case 0x26:
printk('l');
break;
case 0x2C:
printk('z');
break;
case 0x2D:
printk('x');
break;
case 0x2E:
printk('c');
break;
case 0x2F:
printk('v');
break;
case 0x30:
printk('b');
break;
case 0x31:
printk('n');
break;
case 0x32:
printk('m');
break;
case 0x33:
printk(',');
break;
case 0x34:
printk('.');
break;
case 0x35:
printk('/');
break;
case 0x1C:
printk('\n');
break;
case 0x39:
printk(' ');
break;
default:
printk("keyboard interrupt: ", uhex{key}, "\n");
break;
}
}
return cpu;
}
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