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/module.h>
11 #include <linux/sched.h>
12 #include <linux/slab.h>
13 #include <linux/sysrq.h>
15 #include <linux/consolemap.h>
16 #include <linux/kbd_kern.h>
17 #include <linux/kbd_diacr.h>
18 #include <asm/uaccess.h>
26 k_self, k_fn, k_spec, k_ignore,\
27 k_dead, k_ignore, k_ignore, k_ignore,\
28 k_ignore, k_ignore, k_ignore, k_ignore,\
29 k_ignore, k_ignore, k_ignore, k_ignore
31 typedef void (k_handler_fn)(struct kbd_data *, unsigned char);
32 static k_handler_fn K_HANDLERS;
33 static k_handler_fn *k_handler[16] = { K_HANDLERS };
35 /* maximum values each key_handler can handle */
36 static const int kbd_max_vals[] = {
37 255, ARRAY_SIZE(func_table) - 1, NR_FN_HANDLER - 1, 0,
38 NR_DEAD - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
40 static const int KBD_NR_TYPES = ARRAY_SIZE(kbd_max_vals);
42 static unsigned char ret_diacr[NR_DEAD] = {
43 '`', '\'', '^', '~', '"', ','
47 * Alloc/free of kbd_data structures.
54 kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
57 kbd->key_maps = kzalloc(sizeof(key_maps), GFP_KERNEL);
60 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
63 kmalloc(sizeof(u_short)*NR_KEYS, GFP_KERNEL);
64 if (!kbd->key_maps[i])
66 memcpy(kbd->key_maps[i], key_maps[i],
67 sizeof(u_short)*NR_KEYS);
70 kbd->func_table = kzalloc(sizeof(func_table), GFP_KERNEL);
73 for (i = 0; i < ARRAY_SIZE(func_table); i++) {
75 len = strlen(func_table[i]) + 1;
76 kbd->func_table[i] = kmalloc(len, GFP_KERNEL);
77 if (!kbd->func_table[i])
79 memcpy(kbd->func_table[i], func_table[i], len);
83 kzalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
87 kmalloc(sizeof(struct kbdiacruc)*MAX_DIACR, GFP_KERNEL);
88 if (!kbd->accent_table)
90 memcpy(kbd->accent_table, accent_table,
91 sizeof(struct kbdiacruc)*MAX_DIACR);
92 kbd->accent_table_size = accent_table_size;
96 kfree(kbd->fn_handler);
98 for (i = 0; i < ARRAY_SIZE(func_table); i++)
99 kfree(kbd->func_table[i]);
100 kfree(kbd->func_table);
102 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
103 kfree(kbd->key_maps[i]);
104 kfree(kbd->key_maps);
112 kbd_free(struct kbd_data *kbd)
116 kfree(kbd->accent_table);
117 kfree(kbd->fn_handler);
118 for (i = 0; i < ARRAY_SIZE(func_table); i++)
119 kfree(kbd->func_table[i]);
120 kfree(kbd->func_table);
121 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
122 kfree(kbd->key_maps[i]);
123 kfree(kbd->key_maps);
128 * Generate ascii -> ebcdic translation table from kbd_data.
131 kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
133 unsigned short *keymap, keysym;
136 memset(ascebc, 0x40, 256);
137 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
138 keymap = kbd->key_maps[i];
141 for (j = 0; j < NR_KEYS; j++) {
142 k = ((i & 1) << 7) + j;
144 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
145 KTYP(keysym) == (KT_LETTER | 0xf0))
146 ascebc[KVAL(keysym)] = k;
147 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
148 ascebc[ret_diacr[KVAL(keysym)]] = k;
155 * Generate ebcdic -> ascii translation table from kbd_data.
158 kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
160 unsigned short *keymap, keysym;
163 memset(ebcasc, ' ', 256);
164 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
165 keymap = kbd->key_maps[i];
168 for (j = 0; j < NR_KEYS; j++) {
170 k = ((i & 1) << 7) + j;
171 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
172 KTYP(keysym) == (KT_LETTER | 0xf0))
173 ebcasc[k] = KVAL(keysym);
174 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
175 ebcasc[k] = ret_diacr[KVAL(keysym)];
182 * We have a combining character DIACR here, followed by the character CH.
183 * If the combination occurs in the table, return the corresponding value.
184 * Otherwise, if CH is a space or equals DIACR, return DIACR.
185 * Otherwise, conclude that DIACR was not combining after all,
186 * queue it and return CH.
189 handle_diacr(struct kbd_data *kbd, unsigned int ch)
196 for (i = 0; i < kbd->accent_table_size; i++) {
197 if (kbd->accent_table[i].diacr == d &&
198 kbd->accent_table[i].base == ch)
199 return kbd->accent_table[i].result;
202 if (ch == ' ' || ch == d)
205 kbd_put_queue(kbd->tty, d);
213 k_dead(struct kbd_data *kbd, unsigned char value)
215 value = ret_diacr[value];
216 kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
220 * Normal character handler.
223 k_self(struct kbd_data *kbd, unsigned char value)
226 value = handle_diacr(kbd, value);
227 kbd_put_queue(kbd->tty, value);
231 * Special key handlers
234 k_ignore(struct kbd_data *kbd, unsigned char value)
239 * Function key handler.
242 k_fn(struct kbd_data *kbd, unsigned char value)
244 if (kbd->func_table[value])
245 kbd_puts_queue(kbd->tty, kbd->func_table[value]);
249 k_spec(struct kbd_data *kbd, unsigned char value)
251 if (value >= NR_FN_HANDLER)
253 if (kbd->fn_handler[value])
254 kbd->fn_handler[value](kbd);
258 * Put utf8 character to tty flip buffer.
259 * UTF-8 is defined for words of up to 31 bits,
260 * but we need only 16 bits here
263 to_utf8(struct tty_struct *tty, ushort c)
267 kbd_put_queue(tty, c);
268 else if (c < 0x800) {
269 /* 110***** 10****** */
270 kbd_put_queue(tty, 0xc0 | (c >> 6));
271 kbd_put_queue(tty, 0x80 | (c & 0x3f));
273 /* 1110**** 10****** 10****** */
274 kbd_put_queue(tty, 0xe0 | (c >> 12));
275 kbd_put_queue(tty, 0x80 | ((c >> 6) & 0x3f));
276 kbd_put_queue(tty, 0x80 | (c & 0x3f));
284 kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
286 unsigned short keysym;
287 unsigned char type, value;
289 if (!kbd || !kbd->tty)
293 keysym = kbd->key_maps[5][keycode - 384];
294 else if (keycode >= 256)
295 keysym = kbd->key_maps[4][keycode - 256];
296 else if (keycode >= 128)
297 keysym = kbd->key_maps[1][keycode - 128];
299 keysym = kbd->key_maps[0][keycode];
304 if (type == KT_LETTER)
306 value = KVAL(keysym);
307 #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
309 if (kbd->sysrq == K(KT_LATIN, '-')) {
311 handle_sysrq(value, kbd->tty);
315 kbd->sysrq = K(KT_LATIN, '-');
318 /* Incomplete sysrq sequence. */
319 (*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
321 } else if ((type == KT_LATIN && value == '^') ||
322 (type == KT_DEAD && ret_diacr[value] == '^')) {
323 kbd->sysrq = K(type, value);
327 (*k_handler[type])(kbd, value);
329 to_utf8(kbd->tty, keysym);
336 do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
340 ushort *key_map, val, ov;
342 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
345 if (tmp.kb_index >= NR_KEYS)
348 #if MAX_NR_KEYMAPS < 256
349 if (tmp.kb_table >= MAX_NR_KEYMAPS)
355 key_map = kbd->key_maps[tmp.kb_table];
357 val = U(key_map[tmp.kb_index]);
358 if (KTYP(val) >= KBD_NR_TYPES)
361 val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
362 return put_user(val, &user_kbe->kb_value);
366 if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
367 /* disallocate map */
368 key_map = kbd->key_maps[tmp.kb_table];
370 kbd->key_maps[tmp.kb_table] = NULL;
376 if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
378 if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
381 if (!(key_map = kbd->key_maps[tmp.kb_table])) {
384 key_map = kmalloc(sizeof(plain_map),
388 kbd->key_maps[tmp.kb_table] = key_map;
389 for (j = 0; j < NR_KEYS; j++)
390 key_map[j] = U(K_HOLE);
392 ov = U(key_map[tmp.kb_index]);
393 if (tmp.kb_value == ov)
394 break; /* nothing to do */
398 if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
399 !capable(CAP_SYS_ADMIN))
401 key_map[tmp.kb_index] = U(tmp.kb_value);
408 do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
411 unsigned char kb_func;
415 /* Get u_kbs->kb_func. */
416 if (get_user(kb_func, &u_kbs->kb_func))
418 #if MAX_NR_FUNC < 256
419 if (kb_func >= MAX_NR_FUNC)
425 p = kbd->func_table[kb_func];
428 if (len >= sizeof(u_kbs->kb_string))
429 len = sizeof(u_kbs->kb_string) - 1;
430 if (copy_to_user(u_kbs->kb_string, p, len))
434 if (put_user('\0', u_kbs->kb_string + len))
440 len = strnlen_user(u_kbs->kb_string,
441 sizeof(u_kbs->kb_string) - 1);
444 if (len > sizeof(u_kbs->kb_string) - 1)
446 p = kmalloc(len + 1, GFP_KERNEL);
449 if (copy_from_user(p, u_kbs->kb_string, len)) {
454 kfree(kbd->func_table[kb_func]);
455 kbd->func_table[kb_func] = p;
462 kbd_ioctl(struct kbd_data *kbd, struct file *file,
463 unsigned int cmd, unsigned long arg)
468 argp = (void __user *)arg;
471 * To have permissions to do most of the vt ioctls, we either have
472 * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
474 perm = current->signal->tty == kbd->tty || capable(CAP_SYS_TTY_CONFIG);
477 return put_user(KB_101, (char __user *)argp);
480 return do_kdsk_ioctl(kbd, argp, cmd, perm);
483 return do_kdgkb_ioctl(kbd, argp, cmd, perm);
486 struct kbdiacrs __user *a = argp;
487 struct kbdiacr diacr;
490 if (put_user(kbd->accent_table_size, &a->kb_cnt))
492 for (i = 0; i < kbd->accent_table_size; i++) {
493 diacr.diacr = kbd->accent_table[i].diacr;
494 diacr.base = kbd->accent_table[i].base;
495 diacr.result = kbd->accent_table[i].result;
496 if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
503 struct kbdiacrsuc __user *a = argp;
505 ct = kbd->accent_table_size;
506 if (put_user(ct, &a->kb_cnt))
508 if (copy_to_user(a->kbdiacruc, kbd->accent_table,
509 ct * sizeof(struct kbdiacruc)))
515 struct kbdiacrs __user *a = argp;
516 struct kbdiacr diacr;
521 if (get_user(ct, &a->kb_cnt))
525 kbd->accent_table_size = ct;
526 for (i = 0; i < ct; i++) {
527 if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
529 kbd->accent_table[i].diacr = diacr.diacr;
530 kbd->accent_table[i].base = diacr.base;
531 kbd->accent_table[i].result = diacr.result;
537 struct kbdiacrsuc __user *a = argp;
541 if (get_user(ct, &a->kb_cnt))
545 kbd->accent_table_size = ct;
546 if (copy_from_user(kbd->accent_table, a->kbdiacruc,
547 ct * sizeof(struct kbdiacruc)))
556 EXPORT_SYMBOL(kbd_ioctl);
557 EXPORT_SYMBOL(kbd_ascebc);
558 EXPORT_SYMBOL(kbd_free);
559 EXPORT_SYMBOL(kbd_alloc);
560 EXPORT_SYMBOL(kbd_keycode);