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/*
* <kbd.c>
*
* Open Hack'Ware BIOS generic keyboard input translation.
*
* Copyright (c) 2005 Jocelyn Mayer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "bios.h"
#include "kbd.h"
//#define DEBUG_KBD
#ifdef DEBUG_KBD
#define KBD_DPRINTF(fmt, args...) \
do { dprintf("KBD - %s: " fmt, __func__ , ##args); } while (0)
#else
#define KBD_DPRINTF(fmt, args...) do { } while (0)
#endif
void *kbd_new (int len)
{
kbd_t *kbd;
if (len < (int)sizeof(kbd_t)) {
kbd = NULL;
} else {
kbd = malloc(len);
if (kbd != NULL)
memset(kbd, 0, len);
}
return kbd;
}
int kbd_set_keymap (kbd_t *kbd, int nb_keys, keymap_t *keymap)
{
kbd->nb_keys = nb_keys;
kbd->keymap = keymap;
return 0;
}
int kbd_translate_key (kbd_t *kbd, int keycode, int up_down)
{
keymap_t *keyt;
int mod_state, key, type;
int ret;
ret = -1;
/* Get key table */
if (keycode < kbd->nb_keys) {
keyt = &kbd->keymap[keycode];
/* Get modifier state */
mod_state = (kbd->mod_state | (kbd->mod_state >> 8)) & 0xFF;
/* Adjust with lock */
if (keyt->lck_shift >= 0) {
if ((kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01) {
KBD_DPRINTF("adjust with lock %02x => %02x (%d %08x)\n",
mod_state,
mod_state ^ ((kbd->mod_state >>
(16 + keyt->lck_shift)) &
0x01),
keyt->lck_shift, kbd->mod_state);
}
mod_state ^= (kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01;
}
key = keyt->trans[mod_state];
type = key & 0xFF000000;
key &= ~0xFF000000;
switch (type) {
case KBD_TYPE_REGULAR:
if (!up_down) {
/* We don't care about up events on "normal" keys */
ret = key;
}
break;
case KBD_TYPE_LOCK:
if (!up_down) {
kbd->mod_state ^= key;
ret = -2;
KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
type, key, up_down ? "up" : "down",
kbd->mod_state);
}
break;
case KBD_TYPE_LMOD:
case KBD_TYPE_RMOD:
if (up_down)
kbd->mod_state &= ~key;
else
kbd->mod_state |= key;
KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
type, key, up_down ? "up" : "down", kbd->mod_state);
ret = -2; /* The caller may know the key was a modifier */
break;
default:
KBD_DPRINTF("Unknown key: keycode=%02x mod_state=%02x (%08x)\n",
keycode, mod_state, kbd->mod_state);
break;
}
} else {
KBD_DPRINTF("Unmanaged key: keycode=%02x mod_state %08x\n",
keycode, kbd->mod_state);
}
return ret;
}
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