| /* |
| * <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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| #include "libc/string.h" |
| #include "asm/types.h" |
| #include "kbd.h" |
| |
| //#define DEBUG_KBD |
| #ifdef DEBUG_KBD |
| #define KBD_DPRINTF(fmt, args...) \ |
| do { printk("KBD - %s: " fmt, __func__ , ##args); } while (0) |
| #else |
| #define KBD_DPRINTF(fmt, args...) do { } while (0) |
| #endif |
| |
| int kbd_set_keymap (kbd_t *kbd, int nb_keys, const keymap_t *keymap, const char **sequences) |
| { |
| kbd->nb_keys = nb_keys; |
| kbd->keymap = keymap; |
| kbd->sequences = sequences; |
| |
| return 0; |
| } |
| |
| int kbd_translate_key (kbd_t *kbd, int keycode, int up_down, char *sequence) |
| { |
| const 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 */ |
| *sequence = key; |
| ret = 1; |
| } |
| break; |
| case KBD_TYPE_SEQUENCE: |
| if (!up_down) { |
| /* We don't care about up events on "normal" keys */ |
| ret = strlen(kbd->sequences[key]); |
| memcpy(sequence, kbd->sequences[key], ret); |
| } |
| 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; |
| } |