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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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