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Annotation of qemu/roms/openbios/drivers/kbd.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * <kbd.c>
        !             3:  *
        !             4:  * Open Hack'Ware BIOS generic keyboard input translation.
        !             5:  *
        !             6:  *  Copyright (c) 2005 Jocelyn Mayer
        !             7:  *
        !             8:  *   This program is free software; you can redistribute it and/or
        !             9:  *   modify it under the terms of the GNU General Public License V2
        !            10:  *   as published by the Free Software Foundation
        !            11:  *
        !            12:  *   This program is distributed in the hope that it will be useful,
        !            13:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15:  *   GNU General Public License for more details.
        !            16:  *
        !            17:  *   You should have received a copy of the GNU General Public License
        !            18:  *   along with this program; if not, write to the Free Software
        !            19:  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
        !            20:  */
        !            21: 
        !            22: #include "config.h"
        !            23: #include "libc/string.h"
        !            24: #include "asm/types.h"
        !            25: #include "kbd.h"
        !            26: 
        !            27: //#define DEBUG_KBD
        !            28: #ifdef DEBUG_KBD
        !            29: #define KBD_DPRINTF(fmt, args...) \
        !            30: do { printk("KBD - %s: " fmt, __func__ , ##args); } while (0)
        !            31: #else
        !            32: #define KBD_DPRINTF(fmt, args...) do { } while (0)
        !            33: #endif
        !            34: 
        !            35: int kbd_set_keymap (kbd_t *kbd, int nb_keys, const keymap_t *keymap, const char **sequences)
        !            36: {
        !            37:     kbd->nb_keys = nb_keys;
        !            38:     kbd->keymap = keymap;
        !            39:     kbd->sequences = sequences;
        !            40: 
        !            41:     return 0;
        !            42: }
        !            43: 
        !            44: int kbd_translate_key (kbd_t *kbd, int keycode, int up_down, char *sequence)
        !            45: {
        !            46:     const keymap_t *keyt;
        !            47:     int mod_state, key, type;
        !            48:     int ret;
        !            49: 
        !            50:     ret = -1;
        !            51:     /* Get key table */
        !            52:     if (keycode < kbd->nb_keys) {
        !            53:         keyt = &kbd->keymap[keycode];
        !            54:         /* Get modifier state */
        !            55:         mod_state = (kbd->mod_state | (kbd->mod_state >> 8)) & 0xFF;
        !            56:         /* Adjust with lock */
        !            57:         if (keyt->lck_shift >= 0) {
        !            58:             if ((kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01) {
        !            59:                 KBD_DPRINTF("adjust with lock %02x => %02x (%d %08x)\n",
        !            60:                             mod_state,
        !            61:                             mod_state ^ ((kbd->mod_state >>
        !            62:                                           (16 + keyt->lck_shift)) &
        !            63:                                          0x01),
        !            64:                             keyt->lck_shift, kbd->mod_state);
        !            65:             }
        !            66:             mod_state ^= (kbd->mod_state >> (16 + keyt->lck_shift)) & 0x01;
        !            67:         }
        !            68:         key = keyt->trans[mod_state];
        !            69:         type = key & 0xFF000000;
        !            70:         key &= ~0xFF000000;
        !            71:         switch (type) {
        !            72:         case KBD_TYPE_REGULAR:
        !            73:             if (!up_down) {
        !            74:                 /* We don't care about up events on "normal" keys */
        !            75:                *sequence = key;
        !            76:                 ret = 1;
        !            77:             }
        !            78:             break;
        !            79:         case KBD_TYPE_SEQUENCE:
        !            80:             if (!up_down) {
        !            81:                 /* We don't care about up events on "normal" keys */
        !            82:                 ret = strlen(kbd->sequences[key]);
        !            83:                memcpy(sequence, kbd->sequences[key], ret);
        !            84:             }
        !            85:             break;
        !            86:         case KBD_TYPE_LOCK:
        !            87:             if (!up_down) {
        !            88:                 kbd->mod_state ^= key;
        !            89:                 ret = -2;
        !            90:                 KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
        !            91:                             type, key, up_down ? "up" : "down",
        !            92:                             kbd->mod_state);
        !            93:             }
        !            94:             break;
        !            95:         case KBD_TYPE_LMOD:
        !            96:         case KBD_TYPE_RMOD:
        !            97:             if (up_down)
        !            98:                 kbd->mod_state &= ~key;
        !            99:             else
        !           100:                 kbd->mod_state |= key;
        !           101:             KBD_DPRINTF("Change modifier type %d key %04x %s => %08x\n",
        !           102:                         type, key, up_down ? "up" : "down", kbd->mod_state);
        !           103:             ret = -2; /* The caller may know the key was a modifier */
        !           104:             break;
        !           105:         default:
        !           106:             KBD_DPRINTF("Unknown key: keycode=%02x mod_state=%02x (%08x)\n",
        !           107:                         keycode, mod_state, kbd->mod_state);
        !           108:             break;
        !           109:         }
        !           110:     } else {
        !           111:         KBD_DPRINTF("Unmanaged key: keycode=%02x mod_state %08x\n",
        !           112:                     keycode, kbd->mod_state);
        !           113:     }
        !           114: 
        !           115:     return ret;
        !           116: }

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