mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-07 19:57:45 +03:00
136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
#include "types.h"
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#include "i386.h"
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#include "IO.h"
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#include "IPC.h"
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#include "Task.h"
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#include "VGA.h"
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#include "PIC.h"
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#include "Keyboard.h"
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#define IRQ_KEYBOARD 1
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#define I8042_BUFFER 0x60
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#define I8042_STATUS 0x64
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#define SET_LEDS 0xED
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#define DATA_AVAILABLE 0x01
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#define I8042_ACK 0xFA
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extern "C" void handleKeyboardInterrupt();
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extern "C" void keyboard_ISR();
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static BYTE s_ledState;
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asm(
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".globl keyboard_ISR \n"
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"keyboard_ISR: \n"
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" pusha\n"
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" pushw %ds\n"
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" pushw %es\n"
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" pushw %ss\n"
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" pushw %ss\n"
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" popw %ds\n"
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" popw %es\n"
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" call handleKeyboardInterrupt\n"
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" popw %es\n"
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" popw %ds\n"
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" popa\n"
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" iret\n"
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);
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void handleKeyboardInterrupt()
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{
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IRQHandlerScope scope(IRQ_KEYBOARD);
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Keyboard::handleInterrupt();
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}
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namespace Keyboard {
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#define MOD_ALT 1
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#define MOD_CTRL 2
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#define MOD_SHIFT 4
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static char map[0x100] =
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{
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0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0, 0,
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'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 0, 0,
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'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`', 0, '\\',
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'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
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};
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static char shift_map[0x100] =
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{
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0, 0, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
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'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 0, 0,
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'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', 0, '|',
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'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
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};
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static BYTE s_modifiers;
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void handleInterrupt()
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{
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while (IO::in8(0x64) & 1) {
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BYTE ch = IO::in8(0x60);
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switch (ch) {
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case 0x38: s_modifiers |= MOD_ALT; break;
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case 0xB8: s_modifiers &= ~MOD_ALT; break;
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case 0x1D: s_modifiers |= MOD_CTRL; break;
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case 0x9D: s_modifiers &= ~MOD_CTRL; break;
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case 0x2A: s_modifiers |= MOD_SHIFT; break;
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case 0xAA: s_modifiers &= ~MOD_SHIFT; break;
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case 0x1C: /* enter */ kprintf("\n"); break;
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case 0xFA: /* i8042 ack */ break;
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default:
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if (ch & 0x80) {
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// key has been depressed
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break;
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}
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if (!s_modifiers)
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kprintf("%c", map[ch]);
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else if (s_modifiers & MOD_SHIFT)
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kprintf("%c", shift_map[ch]);
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else if (s_modifiers & MOD_CTRL)
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kprintf("^%c", shift_map[ch]);
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}
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//break;
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}
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}
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void initialize()
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{
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s_modifiers = 0;
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s_ledState = 0;
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// Empty the buffer of any pending data.
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// I don't care what you've been pressing until now!
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while (IO::in8(I8042_STATUS ) & DATA_AVAILABLE)
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IO::in8(I8042_BUFFER);
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registerInterruptHandler(IRQ_VECTOR_BASE + IRQ_KEYBOARD, keyboard_ISR);
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PIC::enable(IRQ_KEYBOARD);
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}
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void setLED(LED led)
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{
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s_ledState |= (BYTE)led & 7;
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while (IO::in8(I8042_STATUS) & DATA_AVAILABLE);
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IO::out8(I8042_BUFFER, SET_LEDS);
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while (IO::in8(I8042_BUFFER) != I8042_ACK);
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IO::out8(I8042_BUFFER, s_ledState);
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}
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void unsetLED(LED led)
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{
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s_ledState &= ~((BYTE)led & 7);
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while (IO::in8(I8042_STATUS) & DATA_AVAILABLE);
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IO::out8(I8042_BUFFER, SET_LEDS);
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while (IO::in8(I8042_BUFFER) != I8042_ACK);
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IO::out8(I8042_BUFFER, s_ledState);
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}
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}
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