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 = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
56 kbd->key_maps = kzalloc(sizeof(key_maps), GFP_KERNEL);
59 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
62 kmalloc(sizeof(u_short)*NR_KEYS, GFP_KERNEL);
63 if (!kbd->key_maps[i])
65 memcpy(kbd->key_maps[i], key_maps[i],
66 sizeof(u_short)*NR_KEYS);
69 kbd->func_table = kzalloc(sizeof(func_table), GFP_KERNEL);
72 for (i = 0; i < ARRAY_SIZE(func_table); i++) {
74 len = strlen(func_table[i]) + 1;
75 kbd->func_table[i] = kmalloc(len, GFP_KERNEL);
76 if (!kbd->func_table[i])
78 memcpy(kbd->func_table[i], func_table[i], len);
82 kzalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
86 kmalloc(sizeof(struct kbdiacr)*MAX_DIACR, GFP_KERNEL);
87 if (!kbd->accent_table)
89 memcpy(kbd->accent_table, accent_table,
90 sizeof(struct kbdiacr)*MAX_DIACR);
91 kbd->accent_table_size = accent_table_size;
95 kfree(kbd->fn_handler);
97 for (i = 0; i < ARRAY_SIZE(func_table); i++)
98 kfree(kbd->func_table[i]);
99 kfree(kbd->func_table);
101 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
102 kfree(kbd->key_maps[i]);
103 kfree(kbd->key_maps);
111 kbd_free(struct kbd_data *kbd)
115 kfree(kbd->accent_table);
116 kfree(kbd->fn_handler);
117 for (i = 0; i < ARRAY_SIZE(func_table); i++)
118 kfree(kbd->func_table[i]);
119 kfree(kbd->func_table);
120 for (i = 0; i < ARRAY_SIZE(key_maps); i++)
121 kfree(kbd->key_maps[i]);
122 kfree(kbd->key_maps);
127 * Generate ascii -> ebcdic translation table from kbd_data.
130 kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
132 unsigned short *keymap, keysym;
135 memset(ascebc, 0x40, 256);
136 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
137 keymap = kbd->key_maps[i];
140 for (j = 0; j < NR_KEYS; j++) {
141 k = ((i & 1) << 7) + j;
143 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
144 KTYP(keysym) == (KT_LETTER | 0xf0))
145 ascebc[KVAL(keysym)] = k;
146 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
147 ascebc[ret_diacr[KVAL(keysym)]] = k;
153 * Generate ebcdic -> ascii translation table from kbd_data.
156 kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
158 unsigned short *keymap, keysym;
161 memset(ebcasc, ' ', 256);
162 for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
163 keymap = kbd->key_maps[i];
166 for (j = 0; j < NR_KEYS; j++) {
168 k = ((i & 1) << 7) + j;
169 if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
170 KTYP(keysym) == (KT_LETTER | 0xf0))
171 ebcasc[k] = KVAL(keysym);
172 else if (KTYP(keysym) == (KT_DEAD | 0xf0))
173 ebcasc[k] = ret_diacr[KVAL(keysym)];
179 * We have a combining character DIACR here, followed by the character CH.
180 * If the combination occurs in the table, return the corresponding value.
181 * Otherwise, if CH is a space or equals DIACR, return DIACR.
182 * Otherwise, conclude that DIACR was not combining after all,
183 * queue it and return CH.
186 handle_diacr(struct kbd_data *kbd, unsigned char ch)
193 for (i = 0; i < kbd->accent_table_size; i++) {
194 if (kbd->accent_table[i].diacr == d &&
195 kbd->accent_table[i].base == ch)
196 return kbd->accent_table[i].result;
199 if (ch == ' ' || ch == d)
202 kbd_put_queue(kbd->tty, d);
210 k_dead(struct kbd_data *kbd, unsigned char value)
212 value = ret_diacr[value];
213 kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
217 * Normal character handler.
220 k_self(struct kbd_data *kbd, unsigned char value)
223 value = handle_diacr(kbd, value);
224 kbd_put_queue(kbd->tty, value);
228 * Special key handlers
231 k_ignore(struct kbd_data *kbd, unsigned char value)
236 * Function key handler.
239 k_fn(struct kbd_data *kbd, unsigned char value)
241 if (kbd->func_table[value])
242 kbd_puts_queue(kbd->tty, kbd->func_table[value]);
246 k_spec(struct kbd_data *kbd, unsigned char value)
248 if (value >= NR_FN_HANDLER)
250 if (kbd->fn_handler[value])
251 kbd->fn_handler[value](kbd);
255 * Put utf8 character to tty flip buffer.
256 * UTF-8 is defined for words of up to 31 bits,
257 * but we need only 16 bits here
260 to_utf8(struct tty_struct *tty, ushort c)
264 kbd_put_queue(tty, c);
265 else if (c < 0x800) {
266 /* 110***** 10****** */
267 kbd_put_queue(tty, 0xc0 | (c >> 6));
268 kbd_put_queue(tty, 0x80 | (c & 0x3f));
270 /* 1110**** 10****** 10****** */
271 kbd_put_queue(tty, 0xe0 | (c >> 12));
272 kbd_put_queue(tty, 0x80 | ((c >> 6) & 0x3f));
273 kbd_put_queue(tty, 0x80 | (c & 0x3f));
281 kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
283 unsigned short keysym;
284 unsigned char type, value;
286 if (!kbd || !kbd->tty)
290 keysym = kbd->key_maps[5][keycode - 384];
291 else if (keycode >= 256)
292 keysym = kbd->key_maps[4][keycode - 256];
293 else if (keycode >= 128)
294 keysym = kbd->key_maps[1][keycode - 128];
296 keysym = kbd->key_maps[0][keycode];
301 if (type == KT_LETTER)
303 value = KVAL(keysym);
304 #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
306 if (kbd->sysrq == K(KT_LATIN, '-')) {
308 handle_sysrq(value, 0, kbd->tty);
312 kbd->sysrq = K(KT_LATIN, '-');
315 /* Incomplete sysrq sequence. */
316 (*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
318 } else if ((type == KT_LATIN && value == '^') ||
319 (type == KT_DEAD && ret_diacr[value] == '^')) {
320 kbd->sysrq = K(type, value);
324 (*k_handler[type])(kbd, value);
326 to_utf8(kbd->tty, keysym);
333 do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
337 ushort *key_map, val, ov;
339 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
342 if (tmp.kb_index >= NR_KEYS)
345 #if MAX_NR_KEYMAPS < 256
346 if (tmp.kb_table >= MAX_NR_KEYMAPS)
352 key_map = kbd->key_maps[tmp.kb_table];
354 val = U(key_map[tmp.kb_index]);
355 if (KTYP(val) >= KBD_NR_TYPES)
358 val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
359 return put_user(val, &user_kbe->kb_value);
363 if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
364 /* disallocate map */
365 key_map = kbd->key_maps[tmp.kb_table];
367 kbd->key_maps[tmp.kb_table] = 0;
373 if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
375 if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
378 if (!(key_map = kbd->key_maps[tmp.kb_table])) {
381 key_map = (ushort *) kmalloc(sizeof(plain_map),
385 kbd->key_maps[tmp.kb_table] = key_map;
386 for (j = 0; j < NR_KEYS; j++)
387 key_map[j] = U(K_HOLE);
389 ov = U(key_map[tmp.kb_index]);
390 if (tmp.kb_value == ov)
391 break; /* nothing to do */
395 if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
396 !capable(CAP_SYS_ADMIN))
398 key_map[tmp.kb_index] = U(tmp.kb_value);
405 do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
408 unsigned char kb_func;
412 /* Get u_kbs->kb_func. */
413 if (get_user(kb_func, &u_kbs->kb_func))
415 #if MAX_NR_FUNC < 256
416 if (kb_func >= MAX_NR_FUNC)
422 p = kbd->func_table[kb_func];
425 if (len >= sizeof(u_kbs->kb_string))
426 len = sizeof(u_kbs->kb_string) - 1;
427 if (copy_to_user(u_kbs->kb_string, p, len))
431 if (put_user('\0', u_kbs->kb_string + len))
437 len = strnlen_user(u_kbs->kb_string,
438 sizeof(u_kbs->kb_string) - 1);
441 if (len > sizeof(u_kbs->kb_string) - 1)
443 p = kmalloc(len + 1, GFP_KERNEL);
446 if (copy_from_user(p, u_kbs->kb_string, len)) {
451 kfree(kbd->func_table[kb_func]);
452 kbd->func_table[kb_func] = p;
459 kbd_ioctl(struct kbd_data *kbd, struct file *file,
460 unsigned int cmd, unsigned long arg)
462 struct kbdiacrs __user *a;
466 argp = (void __user *)arg;
469 * To have permissions to do most of the vt ioctls, we either have
470 * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
472 perm = current->signal->tty == kbd->tty || capable(CAP_SYS_TTY_CONFIG);
475 return put_user(KB_101, (char __user *)argp);
478 return do_kdsk_ioctl(kbd, argp, cmd, perm);
481 return do_kdgkb_ioctl(kbd, argp, cmd, perm);
485 if (put_user(kbd->accent_table_size, &a->kb_cnt))
487 ct = kbd->accent_table_size;
488 if (copy_to_user(a->kbdiacr, kbd->accent_table,
489 ct * sizeof(struct kbdiacr)))
496 if (get_user(ct, &a->kb_cnt))
500 kbd->accent_table_size = ct;
501 if (copy_from_user(kbd->accent_table, a->kbdiacr,
502 ct * sizeof(struct kbdiacr)))
510 EXPORT_SYMBOL(kbd_ioctl);
511 EXPORT_SYMBOL(kbd_ascebc);
512 EXPORT_SYMBOL(kbd_free);
513 EXPORT_SYMBOL(kbd_alloc);
514 EXPORT_SYMBOL(kbd_keycode);