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#include <kernel/input/keyboard.h>
#include <kernel/tty/tty_vga.h>
#include <kernel/tty.h>
#include <kernel/kthread.h>
#include <kernel/pic.h>
#include <libk/string.h>
static uint8_t keymap_modifiers[256] = {
[0x1D] KB_CTL,
[0x2A] KB_SHIFT,
[0x36] KB_SHIFT,
[0x38] KB_ALT,
[0x9D] KB_CTL,
[0xB8] KB_ALT
};
static uint8_t keymap_toggles[256] = {
[0x3A] KB_CPSLK,
[0x45] KB_NUMLK,
[0x46] KB_SCLLK
};
static uint8_t keymap_normal[256] = {
0, 0x1B, '1', '2', '3', '4', '5', '6',
'7', '8', '9', '0', '-', '=', '\b', '\t',
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
'o', 'p', '[', ']', '\n', 0, 'a', 's',
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
'\'', '`', 0, '\\', 'z', 'x', 'c', 'v',
'b', 'n', 'm', ',', '.', '/', 0, '*',
0, ' ', 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, '7',
'8', '9', '-', '4', '5', '6', '+', '1',
'2', '3', '0', '.', 0, 0, 0, 0,
[0x9C] '\n',
[0xB5] '/',
[0xC8] KB_UP,
[0xD0] KB_DOWN,
[0xC9] KB_PGUP,
[0xD1] KB_PGDN,
[0xCB] KB_LEFT,
[0xCD] KB_RGHT,
[0x97] KB_HOME,
[0xCF] KB_END,
[0xD2] KB_INS,
[0xD3] KB_DEL
};
static uint8_t keymap_shifted[256] = {
0, 0x33, '!', '@', '#', '$', '%', '^',
'&', '*', '(', ')', '_', '+', '\b', '\t',
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
'O', 'P', '{', '}', '\n', 0, 'A', 'S',
'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',
'"', '~', 0, '|', 'Z', 'X', 'C', 'V',
'B', 'N', 'M', '<', '>', '?', 0, '*',
0, ' ', 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, '7',
'8', '9', '-', '4', '5', '6', '+', '1',
'2', '3', '0', '.', 0, 0, 0, 0,
[0x9C] '\n',
[0xB5] '/',
[0xC8] KB_UP,
[0xD0] KB_DOWN,
[0xC9] KB_PGUP,
[0xD1] KB_PGDN,
[0xCB] KB_LEFT,
[0xCD] KB_RGHT,
[0x97] KB_HOME,
[0xCF] KB_END,
[0xD2] KB_INS,
[0xD3] KB_DEL
};
static uint8_t keymap_control[256] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
C('Q'), C('W'), C('E'), C('R'), C('T'), C('Y'), C('U'), C('I'),
C('O'), C('P'), 0, 0, '\r', 0, C('A'), C('S'),
C('D'), C('F'), C('G'), C('H'), C('J'), C('K'), C('L'), 0,
0, 0, 0, C('\\'), C('Z'), C('X'), C('C'), C('V'),
C('B'), C('N'), C('M'), 0, 0, C('/'), 0, 0,
[0x9C] '\r',
[0xB5] C('/'),
[0xC8] KB_UP,
[0xD0] KB_DOWN,
[0xC9] KB_PGUP,
[0xD1] KB_PGDN,
[0xCB] KB_LEFT,
[0xCD] KB_RGHT,
[0x97] KB_HOME,
[0xCF] KB_END,
[0xD2] KB_INS,
[0xD3] KB_DEL
};
static uint8_t* keymaps[4] = {
keymap_normal,
keymap_shifted,
keymap_control,
keymap_control,
};
char keyboard_getchar(void) {
static int shift = 0;
uint8_t st = inb(KB_STAT);
if ((st & KB_DIB) == 0)
return -1;
uint8_t data = inb(KB_DATA);
if (data == 0xE0) {
shift |= KB_E0ESC;
return -1;
} else if (data & 0x80) {
if (!(shift & KB_E0ESC))
data &= 0x7F;
shift &= ~(keymap_modifiers[data] | KB_E0ESC);
return -1;
} else if (shift & KB_E0ESC) {
data |= 0x80;
shift &= ~KB_E0ESC;
}
shift |= keymap_modifiers[data];
shift ^= keymap_toggles[data];
char c = keymaps[shift & (KB_CTL | KB_SHIFT)][data];
if (shift & KB_CPSLK) {
if ('a' <= c && c <= 'z')
c += 'A' - 'a';
else if ('A' <= c && c <= 'Z')
c += 'a' - 'A';
}
return c;
}
void keyboard_handler(struct isr_frame *frame) {
char c = keyboard_getchar();
if (c != -1)
tty_getchar(c);
return;
}
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