219 lines
4.2 KiB
C
219 lines
4.2 KiB
C
/*
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* Low-level keyboard interrupt driver.
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* vim:tabstop=4
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* vim:noexpandtab
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*
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* XXX: This should move to a server for handling
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* input devices and what have you.
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*
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*/
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#include <system.h>
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struct keyboard_states {
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uint32_t shift : 1;
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uint32_t alt : 1;
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uint32_t ctrl : 1;
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} keyboard_state;
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typedef void (*keyboard_handler_t)(int scancode);
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char kbd_us[128] = {
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0, 27,
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'1','2','3','4','5','6','7','8','9','0',
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'-','=','\b',
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'\t', /* tab */
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'q','w','e','r','t','y','u','i','o','p','[',']','\n',
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0, /* control */
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'a','s','d','f','g','h','j','k','l',';','\'', '`',
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0, /* left shift */
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'\\','z','x','c','v','b','n','m',',','.','/',
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0, /* right shift */
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'*',
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0, /* alt */
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' ', /* space */
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0, /* caps lock */
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0, /* F1 [59] */
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0, 0, 0, 0, 0, 0, 0, 0,
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0, /* ... F10 */
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0, /* 69 num lock */
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0, /* scroll lock */
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0, /* home */
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0, /* up */
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0, /* page up */
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'-',
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0, /* left arrow */
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0,
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0, /* right arrow */
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'+',
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0, /* 79 end */
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0, /* down */
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0, /* page down */
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0, /* insert */
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0, /* delete */
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0, 0, 0,
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0, /* F11 */
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0, /* F12 */
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0, /* everything else */
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};
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char kbd_us_l2[128] = {
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0, 27,
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'!','@','#','$','%','^','&','*','(',')',
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'_','+','\b',
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'\t', /* tab */
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'Q','W','E','R','T','Y','U','I','O','P','{','}','\n',
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0, /* control */
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'A','S','D','F','G','H','J','K','L',':','"', '~',
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0, /* left shift */
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'|','Z','X','C','V','B','N','M','<','>','?',
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0, /* right shift */
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'*',
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0, /* alt */
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' ', /* space */
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0, /* caps lock */
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0, /* F1 [59] */
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0, 0, 0, 0, 0, 0, 0, 0,
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0, /* ... F10 */
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0, /* 69 num lock */
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0, /* scroll lock */
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0, /* home */
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0, /* up */
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0, /* page up */
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'-',
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0, /* left arrow */
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0,
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0, /* right arrow */
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'+',
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0, /* 79 end */
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0, /* down */
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0, /* page down */
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0, /* insert */
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0, /* delete */
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0, 0, 0,
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0, /* F11 */
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0, /* F12 */
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0, /* everything else */
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};
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void norm(int scancode) {
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if (scancode & 0x80) {
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return;
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}
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if (!kbd_us[scancode]) {
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return;
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}
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if (keyboard_state.shift) {
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putch(kbd_us_l2[scancode]);
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} else if (keyboard_state.ctrl) {
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int out = (int)(kbd_us_l2[scancode] - 0x40);
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if (out < 0 || out > 0x1F) {
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putch(kbd_us[scancode]);
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} else {
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putch((char)out);
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}
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} else {
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putch(kbd_us[scancode]);
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}
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}
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void shft(int scancode) {
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keyboard_state.shift ^= 1;
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}
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void altk(int scancode) {
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keyboard_state.alt ^= 1;
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}
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void ctlk(int scancode) {
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keyboard_state.ctrl ^= 1;
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}
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void func(int scancode) {
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kprintf("[NOTICE] Function key %d pressed\n", scancode);
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}
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void spec(int scancode) {
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if (scancode & 0x80) {
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return;
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}
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kprintf("[NOTICE] Special key %d pressed\n", scancode);
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}
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keyboard_handler_t key_method[] = {
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/* 00 */ NULL, spec, norm, norm, norm, norm, norm, norm,
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/* 08 */ norm, norm, norm, norm, norm, norm, norm, norm,
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/* 10 */ norm, norm, norm, norm, norm, norm, norm, norm,
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/* 18 */ norm, norm, norm, norm, norm, ctlk, norm, norm,
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/* 20 */ norm, norm, norm, norm, norm, norm, norm, norm,
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/* 28 */ norm, norm, shft, norm, norm, norm, norm, norm,
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/* 30 */ norm, norm, norm, norm, norm, norm, shft, norm,
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/* 38 */ altk, norm, spec, func, func, func, func, func,
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/* 40 */ func, func, func, func, func, spec, spec, spec,
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/* 48 */ spec, spec, spec, spec, spec, spec, spec, spec,
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/* 50 */ spec, spec, spec, spec, spec, spec, spec, func,
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/* 58 */ func, spec, spec, spec, spec, spec, spec, spec,
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/* 60 */ spec, spec, spec, spec, spec, spec, spec, spec,
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/* 68 */ spec, spec, spec, spec, spec, spec, spec, spec,
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/* 70 */ spec, spec, spec, spec, spec, spec, spec, spec,
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/* 78 */ spec, spec, spec, spec, spec, spec, spec, spec,
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};
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void
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keyboard_handler(
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struct regs *r
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) {
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unsigned char scancode;
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scancode = inportb(0x60);
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keyboard_handler_t handler;
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handler = key_method[(int)scancode & 0x7f];
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if (handler) {
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handler(scancode);
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}
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}
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void
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keyboard_install() {
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/* IRQ installer */
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irq_install_handler(1, keyboard_handler);
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keyboard_buffer_handler = NULL;
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}
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void
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keyboard_wait() {
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while(inportb(0x64) & 2);
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}
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/*
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* putch
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*/
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void
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putch(
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unsigned char c
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) {
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if (keyboard_buffer_handler) {
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keyboard_buffer_handler(c);
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} else {
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writech(c);
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}
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}
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/*
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* Externally Set Keyboard States
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*/
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void
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set_kbd(
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int shift,
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int alt,
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int ctrl
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) {
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keyboard_state.shift = shift;
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keyboard_state.alt = alt;
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keyboard_state.ctrl = ctrl;
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}
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