2 * drivers/s390/char/keyboard.c
3 * ebcdic keycode functions for s390 console drivers
6 * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
10 #include <linux/config.h>
11 #include <linux/module.h>
12 #include <linux/sched.h>
13 #include <linux/sysrq.h>
15 #include <linux/kbd_kern.h>
16 #include <linux/kbd_diacr.h>
17 #include <asm/uaccess.h>
25 k_self, k_fn, k_spec, k_ignore,\
26 k_dead, k_ignore, k_ignore, k_ignore,\
27 k_ignore, k_ignore, k_ignore, k_ignore,\
28 k_ignore, k_ignore, k_ignore, k_ignore
30 typedef void (k_handler_fn)(struct kbd_data *, unsigned char);
31 static k_handler_fn K_HANDLERS;
32 static k_handler_fn *k_handler[16] = { K_HANDLERS };
34 /* maximum values each key_handler can handle */
35 static const int kbd_max_vals[] = {
36 255, ARRAY_SIZE(func_table) - 1, NR_FN_HANDLER - 1, 0,
37 NR_DEAD - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
39 static const int KBD_NR_TYPES = ARRAY_SIZE(kbd_max_vals);
41 static unsigned char ret_diacr[NR_DEAD] = {
42 '`', '\'', '^', '~', '"', ','
46 * Alloc/free of kbd_data structures.
53 kbd = kmalloc(sizeof(struct kbd_data), GFP_KERNEL);
56 memset(kbd, 0, sizeof(struct kbd_data));
57 kbd->key_maps = kmalloc(sizeof(key_maps), GFP_KERNEL);
60 memset(kbd->key_maps, 0, sizeof(key_maps));
61 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
64 kmalloc(sizeof(u_short)*NR_KEYS, GFP_KERNEL);
65 if (!kbd->key_maps[i])
67 memcpy(kbd->key_maps[i], key_maps[i],
68 sizeof(u_short)*NR_KEYS);
71 kbd->func_table = kmalloc(sizeof(func_table), GFP_KERNEL);
74 memset(kbd->func_table, 0, sizeof(func_table));
75 for (i = 0; i < ARRAY_SIZE(func_table); i++) {
77 len = strlen(func_table[i]) + 1;
78 kbd->func_table[i] = kmalloc(len, GFP_KERNEL);
79 if (!kbd->func_table[i])
81 memcpy(kbd->func_table[i], func_table[i], len);
85 kmalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
88 memset(kbd->fn_handler, 0, sizeof(fn_handler_fn *) * NR_FN_HANDLER);
90 kmalloc(sizeof(struct kbdiacr)*MAX_DIACR, GFP_KERNEL);
91 if (!kbd->accent_table)
93 memcpy(kbd->accent_table, accent_table,
94 sizeof(struct kbdiacr)*MAX_DIACR);
95 kbd->accent_table_size = accent_table_size;
99 kfree(kbd->fn_handler);
101 for (i = 0; i < ARRAY_SIZE(func_table); i++)
102 if (kbd->func_table[i])
103 kfree(kbd->func_table[i]);
104 kfree(kbd->func_table);
106 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
107 if (kbd->key_maps[i])
108 kfree(kbd->key_maps[i]);
109 kfree(kbd->key_maps);
117 kbd_free(struct kbd_data *kbd)
121 kfree(kbd->accent_table);
122 kfree(kbd->fn_handler);
123 for (i = 0; i < ARRAY_SIZE(func_table); i++)
124 if (kbd->func_table[i])
125 kfree(kbd->func_table[i]);
126 kfree(kbd->func_table);
127 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
128 if (kbd->key_maps[i])
129 kfree(kbd->key_maps[i]);
130 kfree(kbd->key_maps);
135 * Generate ascii -> ebcdic translation table from kbd_data.
138 kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
140 unsigned short *keymap, keysym;
143 memset(ascebc, 0x40, 256);
144 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
145 keymap = kbd->key_maps[i];
148 for (j = 0; j < NR_KEYS; j++) {
149 k = ((i & 1) << 7) + j;
151 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
152 KTYP(keysym) == (KT_LETTER | 0xf0))
153 ascebc[KVAL(keysym)] = k;
154 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
155 ascebc[ret_diacr[KVAL(keysym)]] = k;
161 * Generate ebcdic -> ascii translation table from kbd_data.
164 kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
166 unsigned short *keymap, keysym;
169 memset(ebcasc, ' ', 256);
170 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
171 keymap = kbd->key_maps[i];
174 for (j = 0; j < NR_KEYS; j++) {
176 k = ((i & 1) << 7) + j;
177 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
178 KTYP(keysym) == (KT_LETTER | 0xf0))
179 ebcasc[k] = KVAL(keysym);
180 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
181 ebcasc[k] = ret_diacr[KVAL(keysym)];
187 * We have a combining character DIACR here, followed by the character CH.
188 * If the combination occurs in the table, return the corresponding value.
189 * Otherwise, if CH is a space or equals DIACR, return DIACR.
190 * Otherwise, conclude that DIACR was not combining after all,
191 * queue it and return CH.
194 handle_diacr(struct kbd_data *kbd, unsigned char ch)
201 for (i = 0; i < kbd->accent_table_size; i++) {
202 if (kbd->accent_table[i].diacr == d &&
203 kbd->accent_table[i].base == ch)
204 return kbd->accent_table[i].result;
207 if (ch == ' ' || ch == d)
210 kbd_put_queue(kbd->tty, d);
218 k_dead(struct kbd_data *kbd, unsigned char value)
220 value = ret_diacr[value];
221 kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
225 * Normal character handler.
228 k_self(struct kbd_data *kbd, unsigned char value)
231 value = handle_diacr(kbd, value);
232 kbd_put_queue(kbd->tty, value);
236 * Special key handlers
239 k_ignore(struct kbd_data *kbd, unsigned char value)
244 * Function key handler.
247 k_fn(struct kbd_data *kbd, unsigned char value)
249 if (kbd->func_table[value])
250 kbd_puts_queue(kbd->tty, kbd->func_table[value]);
254 k_spec(struct kbd_data *kbd, unsigned char value)
256 if (value >= NR_FN_HANDLER)
258 if (kbd->fn_handler[value])
259 kbd->fn_handler[value](kbd);
263 * Put utf8 character to tty flip buffer.
264 * UTF-8 is defined for words of up to 31 bits,
265 * but we need only 16 bits here
268 to_utf8(struct tty_struct *tty, ushort c)
272 kbd_put_queue(tty, c);
273 else if (c < 0x800) {
274 /* 110***** 10****** */
275 kbd_put_queue(tty, 0xc0 | (c >> 6));
276 kbd_put_queue(tty, 0x80 | (c & 0x3f));
278 /* 1110**** 10****** 10****** */
279 kbd_put_queue(tty, 0xe0 | (c >> 12));
280 kbd_put_queue(tty, 0x80 | ((c >> 6) & 0x3f));
281 kbd_put_queue(tty, 0x80 | (c & 0x3f));
289 kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
291 unsigned short keysym;
292 unsigned char type, value;
294 if (!kbd || !kbd->tty)
298 keysym = kbd->key_maps[5][keycode - 384];
299 else if (keycode >= 256)
300 keysym = kbd->key_maps[4][keycode - 256];
301 else if (keycode >= 128)
302 keysym = kbd->key_maps[1][keycode - 128];
304 keysym = kbd->key_maps[0][keycode];
309 if (type == KT_LETTER)
311 value = KVAL(keysym);
312 #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
314 if (kbd->sysrq == K(KT_LATIN, '-')) {
316 handle_sysrq(value, 0, kbd->tty);
320 kbd->sysrq = K(KT_LATIN, '-');
323 /* Incomplete sysrq sequence. */
324 (*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
326 } else if ((type == KT_LATIN && value == '^') ||
327 (type == KT_DEAD && ret_diacr[value] == '^')) {
328 kbd->sysrq = K(type, value);
332 (*k_handler[type])(kbd, value);
334 to_utf8(kbd->tty, keysym);
341 do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
345 ushort *key_map, val, ov;
347 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
350 if (tmp.kb_index >= NR_KEYS)
353 #if MAX_NR_KEYMAPS < 256
354 if (tmp.kb_table >= MAX_NR_KEYMAPS)
360 key_map = kbd->key_maps[tmp.kb_table];
362 val = U(key_map[tmp.kb_index]);
363 if (KTYP(val) >= KBD_NR_TYPES)
366 val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
367 return put_user(val, &user_kbe->kb_value);
371 if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
372 /* disallocate map */
373 key_map = kbd->key_maps[tmp.kb_table];
375 kbd->key_maps[tmp.kb_table] = 0;
381 if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
383 if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
386 if (!(key_map = kbd->key_maps[tmp.kb_table])) {
389 key_map = (ushort *) kmalloc(sizeof(plain_map),
393 kbd->key_maps[tmp.kb_table] = key_map;
394 for (j = 0; j < NR_KEYS; j++)
395 key_map[j] = U(K_HOLE);
397 ov = U(key_map[tmp.kb_index]);
398 if (tmp.kb_value == ov)
399 break; /* nothing to do */
403 if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
404 !capable(CAP_SYS_ADMIN))
406 key_map[tmp.kb_index] = U(tmp.kb_value);
413 do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
416 unsigned char kb_func;
420 /* Get u_kbs->kb_func. */
421 if (get_user(kb_func, &u_kbs->kb_func))
423 #if MAX_NR_FUNC < 256
424 if (kb_func >= MAX_NR_FUNC)
430 p = kbd->func_table[kb_func];
433 if (len >= sizeof(u_kbs->kb_string))
434 len = sizeof(u_kbs->kb_string) - 1;
435 if (copy_to_user(u_kbs->kb_string, p, len))
439 if (put_user('\0', u_kbs->kb_string + len))
445 len = strnlen_user(u_kbs->kb_string,
446 sizeof(u_kbs->kb_string) - 1);
447 p = kmalloc(len, GFP_KERNEL);
450 if (copy_from_user(p, u_kbs->kb_string, len)) {
455 if (kbd->func_table[kb_func])
456 kfree(kbd->func_table[kb_func]);
457 kbd->func_table[kb_func] = p;
464 kbd_ioctl(struct kbd_data *kbd, struct file *file,
465 unsigned int cmd, unsigned long arg)
467 struct kbdiacrs __user *a;
471 argp = (void __user *)arg;
474 * To have permissions to do most of the vt ioctls, we either have
475 * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
477 perm = current->signal->tty == kbd->tty || capable(CAP_SYS_TTY_CONFIG);
480 return put_user(KB_101, (char __user *)argp);
483 return do_kdsk_ioctl(kbd, argp, cmd, perm);
486 return do_kdgkb_ioctl(kbd, argp, cmd, perm);
490 if (put_user(kbd->accent_table_size, &a->kb_cnt))
492 ct = kbd->accent_table_size;
493 if (copy_to_user(a->kbdiacr, kbd->accent_table,
494 ct * sizeof(struct kbdiacr)))
501 if (get_user(ct, &a->kb_cnt))
505 kbd->accent_table_size = ct;
506 if (copy_from_user(kbd->accent_table, a->kbdiacr,
507 ct * sizeof(struct kbdiacr)))
515 EXPORT_SYMBOL(kbd_ioctl);
516 EXPORT_SYMBOL(kbd_ascebc);
517 EXPORT_SYMBOL(kbd_free);
518 EXPORT_SYMBOL(kbd_alloc);
519 EXPORT_SYMBOL(kbd_keycode);