116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
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* <kbd.c>
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*
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* Open Hack'Ware BIOS generic keyboard input translation.
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*
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* Copyright (c) 2005 Jocelyn Mayer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License V2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include "config.h"
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#include "libc/string.h"
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#include "asm/types.h"
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#include "kbd.h"
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//#define DEBUG_KBD
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#ifdef DEBUG_KBD
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#define KBD_DPRINTF(fmt, args...) \
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do { printk("KBD - %s: " fmt, __func__ , ##args); } while (0)
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#else
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#define KBD_DPRINTF(fmt, args...) do { } while (0)
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#endif
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int kbd_set_keymap (kbd_t *kbd, int nb_keys, const keymap_t *keymap, const char **sequences)
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{
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kbd->nb_keys = nb_keys;
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kbd->keymap = keymap;
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kbd->sequences = sequences;
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return 0;
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}
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int kbd_translate_key (kbd_t *kbd, int keycode, int up_down, char *sequence)
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{
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const keymap_t *keyt;
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int mod_state, key, type;
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int ret;
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ret = -1;
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/* Get key table */
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if (keycode < kbd->nb_keys) {
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keyt = &kbd->keymap[keycode];
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/* Get modifier state */
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mod_state = (kbd->mod_state | (kbd->mod_state >> 8)) & 0xFF;
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/* Adjust with lock */
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if (keyt->lck_shift >= 0) {
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if ((kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01) {
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KBD_DPRINTF("adjust with lock %02x => %02x (%d %08x)\n",
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mod_state,
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mod_state ^ ((kbd->mod_state >>
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(16 + keyt->lck_shift)) &
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0x01),
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keyt->lck_shift, kbd->mod_state);
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}
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mod_state ^= (kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01;
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}
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key = keyt->trans[mod_state];
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type = key & 0xFF000000;
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key &= ~0xFF000000;
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switch (type) {
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case KBD_TYPE_REGULAR:
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if (!up_down) {
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/* We don't care about up events on "normal" keys */
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*sequence = key;
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ret = 1;
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}
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break;
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case KBD_TYPE_SEQUENCE:
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if (!up_down) {
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/* We don't care about up events on "normal" keys */
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ret = strlen(kbd->sequences[key]);
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memcpy(sequence, kbd->sequences[key], ret);
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}
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break;
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case KBD_TYPE_LOCK:
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if (!up_down) {
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kbd->mod_state ^= key;
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ret = -2;
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KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
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type, key, up_down ? "up" : "down",
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kbd->mod_state);
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}
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break;
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case KBD_TYPE_LMOD:
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case KBD_TYPE_RMOD:
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if (up_down)
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kbd->mod_state &= ~key;
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else
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kbd->mod_state |= key;
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KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
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type, key, up_down ? "up" : "down", kbd->mod_state);
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ret = -2; /* The caller may know the key was a modifier */
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break;
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default:
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KBD_DPRINTF("Unknown key: keycode=%02x mod_state=%02x (%08x)\n",
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keycode, mod_state, kbd->mod_state);
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break;
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}
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} else {
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KBD_DPRINTF("Unmanaged key: keycode=%02x mod_state %08x\n",
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keycode, kbd->mod_state);
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}
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return ret;
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}
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