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 kfree(kbd->func_table[i]);
103 kfree(kbd->func_table);
105 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
106 kfree(kbd->key_maps[i]);
107 kfree(kbd->key_maps);
115 kbd_free(struct kbd_data *kbd)
119 kfree(kbd->accent_table);
120 kfree(kbd->fn_handler);
121 for (i = 0; i < ARRAY_SIZE(func_table); i++)
122 kfree(kbd->func_table[i]);
123 kfree(kbd->func_table);
124 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
125 kfree(kbd->key_maps[i]);
126 kfree(kbd->key_maps);
131 * Generate ascii -> ebcdic translation table from kbd_data.
134 kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
136 unsigned short *keymap, keysym;
139 memset(ascebc, 0x40, 256);
140 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
141 keymap = kbd->key_maps[i];
144 for (j = 0; j < NR_KEYS; j++) {
145 k = ((i & 1) << 7) + j;
147 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
148 KTYP(keysym) == (KT_LETTER | 0xf0))
149 ascebc[KVAL(keysym)] = k;
150 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
151 ascebc[ret_diacr[KVAL(keysym)]] = k;
157 * Generate ebcdic -> ascii translation table from kbd_data.
160 kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
162 unsigned short *keymap, keysym;
165 memset(ebcasc, ' ', 256);
166 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
167 keymap = kbd->key_maps[i];
170 for (j = 0; j < NR_KEYS; j++) {
172 k = ((i & 1) << 7) + j;
173 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
174 KTYP(keysym) == (KT_LETTER | 0xf0))
175 ebcasc[k] = KVAL(keysym);
176 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
177 ebcasc[k] = ret_diacr[KVAL(keysym)];
183 * We have a combining character DIACR here, followed by the character CH.
184 * If the combination occurs in the table, return the corresponding value.
185 * Otherwise, if CH is a space or equals DIACR, return DIACR.
186 * Otherwise, conclude that DIACR was not combining after all,
187 * queue it and return CH.
190 handle_diacr(struct kbd_data *kbd, unsigned char ch)
197 for (i = 0; i < kbd->accent_table_size; i++) {
198 if (kbd->accent_table[i].diacr == d &&
199 kbd->accent_table[i].base == ch)
200 return kbd->accent_table[i].result;
203 if (ch == ' ' || ch == d)
206 kbd_put_queue(kbd->tty, d);
214 k_dead(struct kbd_data *kbd, unsigned char value)
216 value = ret_diacr[value];
217 kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
221 * Normal character handler.
224 k_self(struct kbd_data *kbd, unsigned char value)
227 value = handle_diacr(kbd, value);
228 kbd_put_queue(kbd->tty, value);
232 * Special key handlers
235 k_ignore(struct kbd_data *kbd, unsigned char value)
240 * Function key handler.
243 k_fn(struct kbd_data *kbd, unsigned char value)
245 if (kbd->func_table[value])
246 kbd_puts_queue(kbd->tty, kbd->func_table[value]);
250 k_spec(struct kbd_data *kbd, unsigned char value)
252 if (value >= NR_FN_HANDLER)
254 if (kbd->fn_handler[value])
255 kbd->fn_handler[value](kbd);
259 * Put utf8 character to tty flip buffer.
260 * UTF-8 is defined for words of up to 31 bits,
261 * but we need only 16 bits here
264 to_utf8(struct tty_struct *tty, ushort c)
268 kbd_put_queue(tty, c);
269 else if (c < 0x800) {
270 /* 110***** 10****** */
271 kbd_put_queue(tty, 0xc0 | (c >> 6));
272 kbd_put_queue(tty, 0x80 | (c & 0x3f));
274 /* 1110**** 10****** 10****** */
275 kbd_put_queue(tty, 0xe0 | (c >> 12));
276 kbd_put_queue(tty, 0x80 | ((c >> 6) & 0x3f));
277 kbd_put_queue(tty, 0x80 | (c & 0x3f));
285 kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
287 unsigned short keysym;
288 unsigned char type, value;
290 if (!kbd || !kbd->tty)
294 keysym = kbd->key_maps[5][keycode - 384];
295 else if (keycode >= 256)
296 keysym = kbd->key_maps[4][keycode - 256];
297 else if (keycode >= 128)
298 keysym = kbd->key_maps[1][keycode - 128];
300 keysym = kbd->key_maps[0][keycode];
305 if (type == KT_LETTER)
307 value = KVAL(keysym);
308 #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
310 if (kbd->sysrq == K(KT_LATIN, '-')) {
312 handle_sysrq(value, 0, kbd->tty);
316 kbd->sysrq = K(KT_LATIN, '-');
319 /* Incomplete sysrq sequence. */
320 (*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
322 } else if ((type == KT_LATIN && value == '^') ||
323 (type == KT_DEAD && ret_diacr[value] == '^')) {
324 kbd->sysrq = K(type, value);
328 (*k_handler[type])(kbd, value);
330 to_utf8(kbd->tty, keysym);
337 do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
341 ushort *key_map, val, ov;
343 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
346 if (tmp.kb_index >= NR_KEYS)
349 #if MAX_NR_KEYMAPS < 256
350 if (tmp.kb_table >= MAX_NR_KEYMAPS)
356 key_map = kbd->key_maps[tmp.kb_table];
358 val = U(key_map[tmp.kb_index]);
359 if (KTYP(val) >= KBD_NR_TYPES)
362 val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
363 return put_user(val, &user_kbe->kb_value);
367 if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
368 /* disallocate map */
369 key_map = kbd->key_maps[tmp.kb_table];
371 kbd->key_maps[tmp.kb_table] = 0;
377 if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
379 if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
382 if (!(key_map = kbd->key_maps[tmp.kb_table])) {
385 key_map = (ushort *) kmalloc(sizeof(plain_map),
389 kbd->key_maps[tmp.kb_table] = key_map;
390 for (j = 0; j < NR_KEYS; j++)
391 key_map[j] = U(K_HOLE);
393 ov = U(key_map[tmp.kb_index]);
394 if (tmp.kb_value == ov)
395 break; /* nothing to do */
399 if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
400 !capable(CAP_SYS_ADMIN))
402 key_map[tmp.kb_index] = U(tmp.kb_value);
409 do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
412 unsigned char kb_func;
416 /* Get u_kbs->kb_func. */
417 if (get_user(kb_func, &u_kbs->kb_func))
419 #if MAX_NR_FUNC < 256
420 if (kb_func >= MAX_NR_FUNC)
426 p = kbd->func_table[kb_func];
429 if (len >= sizeof(u_kbs->kb_string))
430 len = sizeof(u_kbs->kb_string) - 1;
431 if (copy_to_user(u_kbs->kb_string, p, len))
435 if (put_user('\0', u_kbs->kb_string + len))
441 len = strnlen_user(u_kbs->kb_string,
442 sizeof(u_kbs->kb_string) - 1);
445 if (len > sizeof(u_kbs->kb_string) - 1)
447 p = kmalloc(len + 1, GFP_KERNEL);
450 if (copy_from_user(p, u_kbs->kb_string, len)) {
455 kfree(kbd->func_table[kb_func]);
456 kbd->func_table[kb_func] = p;
463 kbd_ioctl(struct kbd_data *kbd, struct file *file,
464 unsigned int cmd, unsigned long arg)
466 struct kbdiacrs __user *a;
470 argp = (void __user *)arg;
473 * To have permissions to do most of the vt ioctls, we either have
474 * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
476 perm = current->signal->tty == kbd->tty || capable(CAP_SYS_TTY_CONFIG);
479 return put_user(KB_101, (char __user *)argp);
482 return do_kdsk_ioctl(kbd, argp, cmd, perm);
485 return do_kdgkb_ioctl(kbd, argp, cmd, perm);
489 if (put_user(kbd->accent_table_size, &a->kb_cnt))
491 ct = kbd->accent_table_size;
492 if (copy_to_user(a->kbdiacr, kbd->accent_table,
493 ct * sizeof(struct kbdiacr)))
500 if (get_user(ct, &a->kb_cnt))
504 kbd->accent_table_size = ct;
505 if (copy_from_user(kbd->accent_table, a->kbdiacr,
506 ct * sizeof(struct kbdiacr)))
514 EXPORT_SYMBOL(kbd_ioctl);
515 EXPORT_SYMBOL(kbd_ascebc);
516 EXPORT_SYMBOL(kbd_free);
517 EXPORT_SYMBOL(kbd_alloc);
518 EXPORT_SYMBOL(kbd_keycode);