1 // SPDX-License-Identifier: GPL-2.0
3 * Written for linux by Johan Myreen as a translation from
4 * the assembly version by Linus (with diacriticals added)
6 * Some additional features added by Christoph Niemann (ChN), March 1993
8 * Loadable keymaps by Risto Kankkunen, May 1993
11 * Added decr/incr_console, dynamic keymaps, Unicode support,
12 * dynamic function/string keys, led setting, Sept 1994
13 * `Sticky' modifier keys, 951006.
15 * 11-11-96: SAK should now work in the raw mode (Martin Mares)
17 * Modified to provide 'generic' keyboard support by Hamish Macdonald
18 * Merge with the m68k keyboard driver and split-off of the PC low-level
19 * parts by Geert Uytterhoeven, May 1997
21 * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
23 * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28 #include <linux/consolemap.h>
29 #include <linux/module.h>
30 #include <linux/sched/signal.h>
31 #include <linux/sched/debug.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
35 #include <linux/string.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/leds.h>
40 #include <linux/kbd_kern.h>
41 #include <linux/kbd_diacr.h>
42 #include <linux/vt_kern.h>
43 #include <linux/input.h>
44 #include <linux/reboot.h>
45 #include <linux/notifier.h>
46 #include <linux/jiffies.h>
47 #include <linux/uaccess.h>
49 #include <asm/irq_regs.h>
51 extern void ctrl_alt_del(void);
54 * Exported functions/variables
57 #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
59 #if defined(CONFIG_X86) || defined(CONFIG_PARISC)
60 #include <asm/kbdleds.h>
62 static inline int kbd_defleds(void)
75 k_self, k_fn, k_spec, k_pad,\
76 k_dead, k_cons, k_cur, k_shift,\
77 k_meta, k_ascii, k_lock, k_lowercase,\
78 k_slock, k_dead2, k_brl, k_ignore
80 typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
82 static k_handler_fn K_HANDLERS;
83 static k_handler_fn *k_handler[16] = { K_HANDLERS };
86 fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\
87 fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\
88 fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\
89 fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\
90 fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num
92 typedef void (fn_handler_fn)(struct vc_data *vc);
93 static fn_handler_fn FN_HANDLERS;
94 static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
97 * Variables exported for vt_ioctl.c
100 struct vt_spawn_console vt_spawn_con = {
101 .lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock),
111 static struct kbd_struct kbd_table[MAX_NR_CONSOLES];
112 static struct kbd_struct *kbd = kbd_table;
114 /* maximum values each key_handler can handle */
115 static const int max_vals[] = {
116 255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
117 NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
118 255, NR_LOCK - 1, 255, NR_BRL - 1
121 static const int NR_TYPES = ARRAY_SIZE(max_vals);
123 static struct input_handler kbd_handler;
124 static DEFINE_SPINLOCK(kbd_event_lock);
125 static DEFINE_SPINLOCK(led_lock);
126 static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)]; /* keyboard key bitmap */
127 static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */
128 static bool dead_key_next;
129 static int npadch = -1; /* -1 or number assembled on pad */
130 static unsigned int diacr;
131 static char rep; /* flag telling character repeat */
133 static int shift_state = 0;
135 static unsigned int ledstate = -1U; /* undefined */
136 static unsigned char ledioctl;
139 * Notifier list for console keyboard events
141 static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);
143 int register_keyboard_notifier(struct notifier_block *nb)
145 return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
147 EXPORT_SYMBOL_GPL(register_keyboard_notifier);
149 int unregister_keyboard_notifier(struct notifier_block *nb)
151 return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
153 EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);
156 * Translation of scancodes to keycodes. We set them on only the first
157 * keyboard in the list that accepts the scancode and keycode.
158 * Explanation for not choosing the first attached keyboard anymore:
159 * USB keyboards for example have two event devices: one for all "normal"
160 * keys and one for extra function keys (like "volume up", "make coffee",
161 * etc.). So this means that scancodes for the extra function keys won't
162 * be valid for the first event device, but will be for the second.
165 struct getset_keycode_data {
166 struct input_keymap_entry ke;
170 static int getkeycode_helper(struct input_handle *handle, void *data)
172 struct getset_keycode_data *d = data;
174 d->error = input_get_keycode(handle->dev, &d->ke);
176 return d->error == 0; /* stop as soon as we successfully get one */
179 static int getkeycode(unsigned int scancode)
181 struct getset_keycode_data d = {
184 .len = sizeof(scancode),
190 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
192 input_handler_for_each_handle(&kbd_handler, &d, getkeycode_helper);
194 return d.error ?: d.ke.keycode;
197 static int setkeycode_helper(struct input_handle *handle, void *data)
199 struct getset_keycode_data *d = data;
201 d->error = input_set_keycode(handle->dev, &d->ke);
203 return d->error == 0; /* stop as soon as we successfully set one */
206 static int setkeycode(unsigned int scancode, unsigned int keycode)
208 struct getset_keycode_data d = {
211 .len = sizeof(scancode),
217 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
219 input_handler_for_each_handle(&kbd_handler, &d, setkeycode_helper);
225 * Making beeps and bells. Note that we prefer beeps to bells, but when
226 * shutting the sound off we do both.
229 static int kd_sound_helper(struct input_handle *handle, void *data)
231 unsigned int *hz = data;
232 struct input_dev *dev = handle->dev;
234 if (test_bit(EV_SND, dev->evbit)) {
235 if (test_bit(SND_TONE, dev->sndbit)) {
236 input_inject_event(handle, EV_SND, SND_TONE, *hz);
240 if (test_bit(SND_BELL, dev->sndbit))
241 input_inject_event(handle, EV_SND, SND_BELL, *hz ? 1 : 0);
247 static void kd_nosound(struct timer_list *unused)
249 static unsigned int zero;
251 input_handler_for_each_handle(&kbd_handler, &zero, kd_sound_helper);
254 static DEFINE_TIMER(kd_mksound_timer, kd_nosound);
256 void kd_mksound(unsigned int hz, unsigned int ticks)
258 del_timer_sync(&kd_mksound_timer);
260 input_handler_for_each_handle(&kbd_handler, &hz, kd_sound_helper);
263 mod_timer(&kd_mksound_timer, jiffies + ticks);
265 EXPORT_SYMBOL(kd_mksound);
268 * Setting the keyboard rate.
271 static int kbd_rate_helper(struct input_handle *handle, void *data)
273 struct input_dev *dev = handle->dev;
274 struct kbd_repeat *rpt = data;
276 if (test_bit(EV_REP, dev->evbit)) {
278 if (rpt[0].delay > 0)
279 input_inject_event(handle,
280 EV_REP, REP_DELAY, rpt[0].delay);
281 if (rpt[0].period > 0)
282 input_inject_event(handle,
283 EV_REP, REP_PERIOD, rpt[0].period);
285 rpt[1].delay = dev->rep[REP_DELAY];
286 rpt[1].period = dev->rep[REP_PERIOD];
292 int kbd_rate(struct kbd_repeat *rpt)
294 struct kbd_repeat data[2] = { *rpt };
296 input_handler_for_each_handle(&kbd_handler, data, kbd_rate_helper);
297 *rpt = data[1]; /* Copy currently used settings */
305 static void put_queue(struct vc_data *vc, int ch)
307 tty_insert_flip_char(&vc->port, ch, 0);
308 tty_schedule_flip(&vc->port);
311 static void puts_queue(struct vc_data *vc, char *cp)
314 tty_insert_flip_char(&vc->port, *cp, 0);
317 tty_schedule_flip(&vc->port);
320 static void applkey(struct vc_data *vc, int key, char mode)
322 static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
324 buf[1] = (mode ? 'O' : '[');
330 * Many other routines do put_queue, but I think either
331 * they produce ASCII, or they produce some user-assigned
332 * string, and in both cases we might assume that it is
335 static void to_utf8(struct vc_data *vc, uint c)
340 else if (c < 0x800) {
341 /* 110***** 10****** */
342 put_queue(vc, 0xc0 | (c >> 6));
343 put_queue(vc, 0x80 | (c & 0x3f));
344 } else if (c < 0x10000) {
345 if (c >= 0xD800 && c < 0xE000)
349 /* 1110**** 10****** 10****** */
350 put_queue(vc, 0xe0 | (c >> 12));
351 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
352 put_queue(vc, 0x80 | (c & 0x3f));
353 } else if (c < 0x110000) {
354 /* 11110*** 10****** 10****** 10****** */
355 put_queue(vc, 0xf0 | (c >> 18));
356 put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
357 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
358 put_queue(vc, 0x80 | (c & 0x3f));
363 * Called after returning from RAW mode or when changing consoles - recompute
364 * shift_down[] and shift_state from key_down[] maybe called when keymap is
365 * undefined, so that shiftkey release is seen. The caller must hold the
369 static void do_compute_shiftstate(void)
371 unsigned int k, sym, val;
374 memset(shift_down, 0, sizeof(shift_down));
376 for_each_set_bit(k, key_down, min(NR_KEYS, KEY_CNT)) {
377 sym = U(key_maps[0][k]);
378 if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
382 if (val == KVAL(K_CAPSSHIFT))
386 shift_state |= BIT(val);
390 /* We still have to export this method to vt.c */
391 void compute_shiftstate(void)
394 spin_lock_irqsave(&kbd_event_lock, flags);
395 do_compute_shiftstate();
396 spin_unlock_irqrestore(&kbd_event_lock, flags);
400 * We have a combining character DIACR here, followed by the character CH.
401 * If the combination occurs in the table, return the corresponding value.
402 * Otherwise, if CH is a space or equals DIACR, return DIACR.
403 * Otherwise, conclude that DIACR was not combining after all,
404 * queue it and return CH.
406 static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
408 unsigned int d = diacr;
413 if ((d & ~0xff) == BRL_UC_ROW) {
414 if ((ch & ~0xff) == BRL_UC_ROW)
417 for (i = 0; i < accent_table_size; i++)
418 if (accent_table[i].diacr == d && accent_table[i].base == ch)
419 return accent_table[i].result;
422 if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
425 if (kbd->kbdmode == VC_UNICODE)
428 int c = conv_uni_to_8bit(d);
437 * Special function handlers
439 static void fn_enter(struct vc_data *vc)
442 if (kbd->kbdmode == VC_UNICODE)
445 int c = conv_uni_to_8bit(diacr);
453 if (vc_kbd_mode(kbd, VC_CRLF))
457 static void fn_caps_toggle(struct vc_data *vc)
462 chg_vc_kbd_led(kbd, VC_CAPSLOCK);
465 static void fn_caps_on(struct vc_data *vc)
470 set_vc_kbd_led(kbd, VC_CAPSLOCK);
473 static void fn_show_ptregs(struct vc_data *vc)
475 struct pt_regs *regs = get_irq_regs();
481 static void fn_hold(struct vc_data *vc)
483 struct tty_struct *tty = vc->port.tty;
489 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
490 * these routines are also activated by ^S/^Q.
491 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
499 static void fn_num(struct vc_data *vc)
501 if (vc_kbd_mode(kbd, VC_APPLIC))
508 * Bind this to Shift-NumLock if you work in application keypad mode
509 * but want to be able to change the NumLock flag.
510 * Bind this to NumLock if you prefer that the NumLock key always
511 * changes the NumLock flag.
513 static void fn_bare_num(struct vc_data *vc)
516 chg_vc_kbd_led(kbd, VC_NUMLOCK);
519 static void fn_lastcons(struct vc_data *vc)
521 /* switch to the last used console, ChN */
522 set_console(last_console);
525 static void fn_dec_console(struct vc_data *vc)
527 int i, cur = fg_console;
529 /* Currently switching? Queue this next switch relative to that. */
530 if (want_console != -1)
533 for (i = cur - 1; i != cur; i--) {
535 i = MAX_NR_CONSOLES - 1;
536 if (vc_cons_allocated(i))
542 static void fn_inc_console(struct vc_data *vc)
544 int i, cur = fg_console;
546 /* Currently switching? Queue this next switch relative to that. */
547 if (want_console != -1)
550 for (i = cur+1; i != cur; i++) {
551 if (i == MAX_NR_CONSOLES)
553 if (vc_cons_allocated(i))
559 static void fn_send_intr(struct vc_data *vc)
561 tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
562 tty_schedule_flip(&vc->port);
565 static void fn_scroll_forw(struct vc_data *vc)
570 static void fn_scroll_back(struct vc_data *vc)
575 static void fn_show_mem(struct vc_data *vc)
580 static void fn_show_state(struct vc_data *vc)
585 static void fn_boot_it(struct vc_data *vc)
590 static void fn_compose(struct vc_data *vc)
592 dead_key_next = true;
595 static void fn_spawn_con(struct vc_data *vc)
597 spin_lock(&vt_spawn_con.lock);
598 if (vt_spawn_con.pid)
599 if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) {
600 put_pid(vt_spawn_con.pid);
601 vt_spawn_con.pid = NULL;
603 spin_unlock(&vt_spawn_con.lock);
606 static void fn_SAK(struct vc_data *vc)
608 struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
609 schedule_work(SAK_work);
612 static void fn_null(struct vc_data *vc)
614 do_compute_shiftstate();
618 * Special key handlers
620 static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
624 static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
628 if (value >= ARRAY_SIZE(fn_handler))
630 if ((kbd->kbdmode == VC_RAW ||
631 kbd->kbdmode == VC_MEDIUMRAW ||
632 kbd->kbdmode == VC_OFF) &&
633 value != KVAL(K_SAK))
634 return; /* SAK is allowed even in raw mode */
635 fn_handler[value](vc);
638 static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
640 pr_err("k_lowercase was called - impossible\n");
643 static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
646 return; /* no action, if this is a key release */
649 value = handle_diacr(vc, value);
652 dead_key_next = false;
656 if (kbd->kbdmode == VC_UNICODE)
659 int c = conv_uni_to_8bit(value);
666 * Handle dead key. Note that we now may have several
667 * dead keys modifying the same character. Very useful
670 static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
675 diacr = (diacr ? handle_diacr(vc, value) : value);
678 static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
680 k_unicode(vc, conv_8bit_to_uni(value), up_flag);
683 static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
685 k_deadunicode(vc, value, up_flag);
689 * Obsolete - for backwards compatibility only
691 static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
693 static const unsigned char ret_diacr[NR_DEAD] = {
694 '`', /* dead_grave */
695 '\'', /* dead_acute */
696 '^', /* dead_circumflex */
697 '~', /* dead_tilda */
698 '"', /* dead_diaeresis */
699 ',', /* dead_cedilla */
700 '_', /* dead_macron */
701 'U', /* dead_breve */
702 '.', /* dead_abovedot */
703 '*', /* dead_abovering */
704 '=', /* dead_doubleacute */
705 'c', /* dead_caron */
706 'k', /* dead_ogonek */
708 '#', /* dead_voiced_sound */
709 'o', /* dead_semivoiced_sound */
710 '!', /* dead_belowdot */
713 '-', /* dead_stroke */
714 ')', /* dead_abovecomma */
715 '(', /* dead_abovereversedcomma */
716 ':', /* dead_doublegrave */
717 'n', /* dead_invertedbreve */
718 ';', /* dead_belowcomma */
719 '$', /* dead_currency */
720 '@', /* dead_greek */
723 k_deadunicode(vc, ret_diacr[value], up_flag);
726 static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
734 static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
739 if ((unsigned)value < ARRAY_SIZE(func_table)) {
740 if (func_table[value])
741 puts_queue(vc, func_table[value]);
743 pr_err("k_fn called with value=%d\n", value);
746 static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
748 static const char cur_chars[] = "BDCA";
753 applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
756 static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
758 static const char pad_chars[] = "0123456789+-*/\015,.?()#";
759 static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
762 return; /* no action, if this is a key release */
764 /* kludge... shift forces cursor/number keys */
765 if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
766 applkey(vc, app_map[value], 1);
770 if (!vc_kbd_led(kbd, VC_NUMLOCK)) {
775 k_fn(vc, KVAL(K_REMOVE), 0);
778 k_fn(vc, KVAL(K_INSERT), 0);
781 k_fn(vc, KVAL(K_SELECT), 0);
784 k_cur(vc, KVAL(K_DOWN), 0);
787 k_fn(vc, KVAL(K_PGDN), 0);
790 k_cur(vc, KVAL(K_LEFT), 0);
793 k_cur(vc, KVAL(K_RIGHT), 0);
796 k_fn(vc, KVAL(K_FIND), 0);
799 k_cur(vc, KVAL(K_UP), 0);
802 k_fn(vc, KVAL(K_PGUP), 0);
805 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
810 put_queue(vc, pad_chars[value]);
811 if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
815 static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
817 int old_state = shift_state;
823 * a CapsShift key acts like Shift but undoes CapsLock
825 if (value == KVAL(K_CAPSSHIFT)) {
826 value = KVAL(K_SHIFT);
828 clr_vc_kbd_led(kbd, VC_CAPSLOCK);
833 * handle the case that two shift or control
834 * keys are depressed simultaneously
836 if (shift_down[value])
841 if (shift_down[value])
842 shift_state |= (1 << value);
844 shift_state &= ~(1 << value);
847 if (up_flag && shift_state != old_state && npadch != -1) {
848 if (kbd->kbdmode == VC_UNICODE)
851 put_queue(vc, npadch & 0xff);
856 static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
861 if (vc_kbd_mode(kbd, VC_META)) {
862 put_queue(vc, '\033');
863 put_queue(vc, value);
865 put_queue(vc, value | 0x80);
868 static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
876 /* decimal input of code, while Alt depressed */
879 /* hexadecimal input of code, while AltGr depressed */
887 npadch = npadch * base + value;
890 static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
895 chg_vc_kbd_lock(kbd, value);
898 static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
900 k_shift(vc, value, up_flag);
904 chg_vc_kbd_slock(kbd, value);
905 /* try to make Alt, oops, AltGr and such work */
906 if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
908 chg_vc_kbd_slock(kbd, value);
912 /* by default, 300ms interval for combination release */
913 static unsigned brl_timeout = 300;
914 MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
915 module_param(brl_timeout, uint, 0644);
917 static unsigned brl_nbchords = 1;
918 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
919 module_param(brl_nbchords, uint, 0644);
921 static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
923 static unsigned long chords;
924 static unsigned committed;
927 k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
929 committed |= pattern;
931 if (chords == brl_nbchords) {
932 k_unicode(vc, BRL_UC_ROW | committed, up_flag);
939 static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
941 static unsigned pressed, committing;
942 static unsigned long releasestart;
944 if (kbd->kbdmode != VC_UNICODE) {
946 pr_warn("keyboard mode must be unicode for braille patterns\n");
951 k_unicode(vc, BRL_UC_ROW, up_flag);
959 pressed |= 1 << (value - 1);
961 committing = pressed;
962 } else if (brl_timeout) {
965 releasestart + msecs_to_jiffies(brl_timeout))) {
966 committing = pressed;
967 releasestart = jiffies;
969 pressed &= ~(1 << (value - 1));
970 if (!pressed && committing) {
971 k_brlcommit(vc, committing, 0);
976 k_brlcommit(vc, committing, 0);
979 pressed &= ~(1 << (value - 1));
983 #if IS_ENABLED(CONFIG_INPUT_LEDS) && IS_ENABLED(CONFIG_LEDS_TRIGGERS)
985 struct kbd_led_trigger {
986 struct led_trigger trigger;
990 static int kbd_led_trigger_activate(struct led_classdev *cdev)
992 struct kbd_led_trigger *trigger =
993 container_of(cdev->trigger, struct kbd_led_trigger, trigger);
995 tasklet_disable(&keyboard_tasklet);
997 led_trigger_event(&trigger->trigger,
998 ledstate & trigger->mask ?
1000 tasklet_enable(&keyboard_tasklet);
1005 #define KBD_LED_TRIGGER(_led_bit, _name) { \
1008 .activate = kbd_led_trigger_activate, \
1010 .mask = BIT(_led_bit), \
1013 #define KBD_LOCKSTATE_TRIGGER(_led_bit, _name) \
1014 KBD_LED_TRIGGER((_led_bit) + 8, _name)
1016 static struct kbd_led_trigger kbd_led_triggers[] = {
1017 KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
1018 KBD_LED_TRIGGER(VC_NUMLOCK, "kbd-numlock"),
1019 KBD_LED_TRIGGER(VC_CAPSLOCK, "kbd-capslock"),
1020 KBD_LED_TRIGGER(VC_KANALOCK, "kbd-kanalock"),
1022 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK, "kbd-shiftlock"),
1023 KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK, "kbd-altgrlock"),
1024 KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK, "kbd-ctrllock"),
1025 KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK, "kbd-altlock"),
1026 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
1027 KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
1028 KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK, "kbd-ctrlllock"),
1029 KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK, "kbd-ctrlrlock"),
1032 static void kbd_propagate_led_state(unsigned int old_state,
1033 unsigned int new_state)
1035 struct kbd_led_trigger *trigger;
1036 unsigned int changed = old_state ^ new_state;
1039 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1040 trigger = &kbd_led_triggers[i];
1042 if (changed & trigger->mask)
1043 led_trigger_event(&trigger->trigger,
1044 new_state & trigger->mask ?
1045 LED_FULL : LED_OFF);
1049 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1051 unsigned int led_state = *(unsigned int *)data;
1053 if (test_bit(EV_LED, handle->dev->evbit))
1054 kbd_propagate_led_state(~led_state, led_state);
1059 static void kbd_init_leds(void)
1064 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1065 error = led_trigger_register(&kbd_led_triggers[i].trigger);
1067 pr_err("error %d while registering trigger %s\n",
1068 error, kbd_led_triggers[i].trigger.name);
1074 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1076 unsigned int leds = *(unsigned int *)data;
1078 if (test_bit(EV_LED, handle->dev->evbit)) {
1079 input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
1080 input_inject_event(handle, EV_LED, LED_NUML, !!(leds & 0x02));
1081 input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & 0x04));
1082 input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
1088 static void kbd_propagate_led_state(unsigned int old_state,
1089 unsigned int new_state)
1091 input_handler_for_each_handle(&kbd_handler, &new_state,
1092 kbd_update_leds_helper);
1095 static void kbd_init_leds(void)
1102 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
1103 * or (ii) whatever pattern of lights people want to show using KDSETLED,
1104 * or (iii) specified bits of specified words in kernel memory.
1106 static unsigned char getledstate(void)
1108 return ledstate & 0xff;
1111 void setledstate(struct kbd_struct *kb, unsigned int led)
1113 unsigned long flags;
1114 spin_lock_irqsave(&led_lock, flags);
1117 kb->ledmode = LED_SHOW_IOCTL;
1119 kb->ledmode = LED_SHOW_FLAGS;
1122 spin_unlock_irqrestore(&led_lock, flags);
1125 static inline unsigned char getleds(void)
1127 struct kbd_struct *kb = kbd_table + fg_console;
1129 if (kb->ledmode == LED_SHOW_IOCTL)
1132 return kb->ledflagstate;
1136 * vt_get_leds - helper for braille console
1137 * @console: console to read
1138 * @flag: flag we want to check
1140 * Check the status of a keyboard led flag and report it back
1142 int vt_get_leds(int console, int flag)
1144 struct kbd_struct *kb = kbd_table + console;
1146 unsigned long flags;
1148 spin_lock_irqsave(&led_lock, flags);
1149 ret = vc_kbd_led(kb, flag);
1150 spin_unlock_irqrestore(&led_lock, flags);
1154 EXPORT_SYMBOL_GPL(vt_get_leds);
1157 * vt_set_led_state - set LED state of a console
1158 * @console: console to set
1161 * Set the LEDs on a console. This is a wrapper for the VT layer
1162 * so that we can keep kbd knowledge internal
1164 void vt_set_led_state(int console, int leds)
1166 struct kbd_struct *kb = kbd_table + console;
1167 setledstate(kb, leds);
1171 * vt_kbd_con_start - Keyboard side of console start
1174 * Handle console start. This is a wrapper for the VT layer
1175 * so that we can keep kbd knowledge internal
1177 * FIXME: We eventually need to hold the kbd lock here to protect
1178 * the LED updating. We can't do it yet because fn_hold calls stop_tty
1179 * and start_tty under the kbd_event_lock, while normal tty paths
1180 * don't hold the lock. We probably need to split out an LED lock
1181 * but not during an -rc release!
1183 void vt_kbd_con_start(int console)
1185 struct kbd_struct *kb = kbd_table + console;
1186 unsigned long flags;
1187 spin_lock_irqsave(&led_lock, flags);
1188 clr_vc_kbd_led(kb, VC_SCROLLOCK);
1190 spin_unlock_irqrestore(&led_lock, flags);
1194 * vt_kbd_con_stop - Keyboard side of console stop
1197 * Handle console stop. This is a wrapper for the VT layer
1198 * so that we can keep kbd knowledge internal
1200 void vt_kbd_con_stop(int console)
1202 struct kbd_struct *kb = kbd_table + console;
1203 unsigned long flags;
1204 spin_lock_irqsave(&led_lock, flags);
1205 set_vc_kbd_led(kb, VC_SCROLLOCK);
1207 spin_unlock_irqrestore(&led_lock, flags);
1211 * This is the tasklet that updates LED state of LEDs using standard
1212 * keyboard triggers. The reason we use tasklet is that we need to
1213 * handle the scenario when keyboard handler is not registered yet
1214 * but we already getting updates from the VT to update led state.
1216 static void kbd_bh(unsigned long dummy)
1219 unsigned long flags;
1221 spin_lock_irqsave(&led_lock, flags);
1223 leds |= (unsigned int)kbd->lockstate << 8;
1224 spin_unlock_irqrestore(&led_lock, flags);
1226 if (leds != ledstate) {
1227 kbd_propagate_led_state(ledstate, leds);
1232 DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
1234 #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
1235 defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
1236 defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
1237 (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
1239 #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
1240 ((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
1242 static const unsigned short x86_keycodes[256] =
1243 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
1244 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
1245 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
1246 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
1247 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
1248 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
1249 284,285,309, 0,312, 91,327,328,329,331,333,335,336,337,338,339,
1250 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
1251 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
1252 103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
1253 291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
1254 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
1255 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
1256 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
1257 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
1260 static int sparc_l1_a_state;
1261 extern void sun_do_break(void);
1264 static int emulate_raw(struct vc_data *vc, unsigned int keycode,
1265 unsigned char up_flag)
1272 put_queue(vc, 0xe1);
1273 put_queue(vc, 0x1d | up_flag);
1274 put_queue(vc, 0x45 | up_flag);
1279 put_queue(vc, 0xf2);
1284 put_queue(vc, 0xf1);
1289 * Real AT keyboards (that's what we're trying
1290 * to emulate here) emit 0xe0 0x2a 0xe0 0x37 when
1291 * pressing PrtSc/SysRq alone, but simply 0x54
1292 * when pressing Alt+PrtSc/SysRq.
1294 if (test_bit(KEY_LEFTALT, key_down) ||
1295 test_bit(KEY_RIGHTALT, key_down)) {
1296 put_queue(vc, 0x54 | up_flag);
1298 put_queue(vc, 0xe0);
1299 put_queue(vc, 0x2a | up_flag);
1300 put_queue(vc, 0xe0);
1301 put_queue(vc, 0x37 | up_flag);
1309 code = x86_keycodes[keycode];
1314 put_queue(vc, 0xe0);
1315 put_queue(vc, (code & 0x7f) | up_flag);
1325 #define HW_RAW(dev) 0
1327 static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
1332 put_queue(vc, keycode | up_flag);
1337 static void kbd_rawcode(unsigned char data)
1339 struct vc_data *vc = vc_cons[fg_console].d;
1341 kbd = kbd_table + vc->vc_num;
1342 if (kbd->kbdmode == VC_RAW)
1343 put_queue(vc, data);
1346 static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
1348 struct vc_data *vc = vc_cons[fg_console].d;
1349 unsigned short keysym, *key_map;
1352 struct tty_struct *tty;
1354 struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
1359 if (tty && (!tty->driver_data)) {
1360 /* No driver data? Strange. Okay we fix it then. */
1361 tty->driver_data = vc;
1364 kbd = kbd_table + vc->vc_num;
1367 if (keycode == KEY_STOP)
1368 sparc_l1_a_state = down;
1373 raw_mode = (kbd->kbdmode == VC_RAW);
1374 if (raw_mode && !hw_raw)
1375 if (emulate_raw(vc, keycode, !down << 7))
1376 if (keycode < BTN_MISC && printk_ratelimit())
1377 pr_warn("can't emulate rawmode for keycode %d\n",
1381 if (keycode == KEY_A && sparc_l1_a_state) {
1382 sparc_l1_a_state = false;
1387 if (kbd->kbdmode == VC_MEDIUMRAW) {
1389 * This is extended medium raw mode, with keys above 127
1390 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
1391 * the 'up' flag if needed. 0 is reserved, so this shouldn't
1392 * interfere with anything else. The two bytes after 0 will
1393 * always have the up flag set not to interfere with older
1394 * applications. This allows for 16384 different keycodes,
1395 * which should be enough.
1397 if (keycode < 128) {
1398 put_queue(vc, keycode | (!down << 7));
1400 put_queue(vc, !down << 7);
1401 put_queue(vc, (keycode >> 7) | 0x80);
1402 put_queue(vc, keycode | 0x80);
1408 set_bit(keycode, key_down);
1410 clear_bit(keycode, key_down);
1413 (!vc_kbd_mode(kbd, VC_REPEAT) ||
1414 (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
1416 * Don't repeat a key if the input buffers are not empty and the
1417 * characters get aren't echoed locally. This makes key repeat
1418 * usable with slow applications and under heavy loads.
1423 param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
1424 param.ledstate = kbd->ledflagstate;
1425 key_map = key_maps[shift_final];
1427 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1428 KBD_KEYCODE, ¶m);
1429 if (rc == NOTIFY_STOP || !key_map) {
1430 atomic_notifier_call_chain(&keyboard_notifier_list,
1431 KBD_UNBOUND_KEYCODE, ¶m);
1432 do_compute_shiftstate();
1433 kbd->slockstate = 0;
1437 if (keycode < NR_KEYS)
1438 keysym = key_map[keycode];
1439 else if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
1440 keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
1444 type = KTYP(keysym);
1447 param.value = keysym;
1448 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1449 KBD_UNICODE, ¶m);
1450 if (rc != NOTIFY_STOP)
1451 if (down && !raw_mode)
1452 to_utf8(vc, keysym);
1458 if (type == KT_LETTER) {
1460 if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
1461 key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
1463 keysym = key_map[keycode];
1467 param.value = keysym;
1468 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1469 KBD_KEYSYM, ¶m);
1470 if (rc == NOTIFY_STOP)
1473 if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)
1476 (*k_handler[type])(vc, keysym & 0xff, !down);
1478 param.ledstate = kbd->ledflagstate;
1479 atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, ¶m);
1481 if (type != KT_SLOCK)
1482 kbd->slockstate = 0;
1485 static void kbd_event(struct input_handle *handle, unsigned int event_type,
1486 unsigned int event_code, int value)
1488 /* We are called with interrupts disabled, just take the lock */
1489 spin_lock(&kbd_event_lock);
1491 if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
1493 if (event_type == EV_KEY)
1494 kbd_keycode(event_code, value, HW_RAW(handle->dev));
1496 spin_unlock(&kbd_event_lock);
1498 tasklet_schedule(&keyboard_tasklet);
1499 do_poke_blanked_console = 1;
1500 schedule_console_callback();
1503 static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
1507 if (test_bit(EV_SND, dev->evbit))
1510 if (test_bit(EV_KEY, dev->evbit)) {
1511 for (i = KEY_RESERVED; i < BTN_MISC; i++)
1512 if (test_bit(i, dev->keybit))
1514 for (i = KEY_BRL_DOT1; i <= KEY_BRL_DOT10; i++)
1515 if (test_bit(i, dev->keybit))
1523 * When a keyboard (or other input device) is found, the kbd_connect
1524 * function is called. The function then looks at the device, and if it
1525 * likes it, it can open it and get events from it. In this (kbd_connect)
1526 * function, we should decide which VT to bind that keyboard to initially.
1528 static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
1529 const struct input_device_id *id)
1531 struct input_handle *handle;
1534 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
1539 handle->handler = handler;
1540 handle->name = "kbd";
1542 error = input_register_handle(handle);
1544 goto err_free_handle;
1546 error = input_open_device(handle);
1548 goto err_unregister_handle;
1552 err_unregister_handle:
1553 input_unregister_handle(handle);
1559 static void kbd_disconnect(struct input_handle *handle)
1561 input_close_device(handle);
1562 input_unregister_handle(handle);
1567 * Start keyboard handler on the new keyboard by refreshing LED state to
1568 * match the rest of the system.
1570 static void kbd_start(struct input_handle *handle)
1572 tasklet_disable(&keyboard_tasklet);
1574 if (ledstate != -1U)
1575 kbd_update_leds_helper(handle, &ledstate);
1577 tasklet_enable(&keyboard_tasklet);
1580 static const struct input_device_id kbd_ids[] = {
1582 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1583 .evbit = { BIT_MASK(EV_KEY) },
1587 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1588 .evbit = { BIT_MASK(EV_SND) },
1591 { }, /* Terminating entry */
1594 MODULE_DEVICE_TABLE(input, kbd_ids);
1596 static struct input_handler kbd_handler = {
1599 .connect = kbd_connect,
1600 .disconnect = kbd_disconnect,
1603 .id_table = kbd_ids,
1606 int __init kbd_init(void)
1611 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1612 kbd_table[i].ledflagstate = kbd_defleds();
1613 kbd_table[i].default_ledflagstate = kbd_defleds();
1614 kbd_table[i].ledmode = LED_SHOW_FLAGS;
1615 kbd_table[i].lockstate = KBD_DEFLOCK;
1616 kbd_table[i].slockstate = 0;
1617 kbd_table[i].modeflags = KBD_DEFMODE;
1618 kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
1623 error = input_register_handler(&kbd_handler);
1627 tasklet_enable(&keyboard_tasklet);
1628 tasklet_schedule(&keyboard_tasklet);
1633 /* Ioctl support code */
1636 * vt_do_diacrit - diacritical table updates
1637 * @cmd: ioctl request
1638 * @udp: pointer to user data for ioctl
1639 * @perm: permissions check computed by caller
1641 * Update the diacritical tables atomically and safely. Lock them
1642 * against simultaneous keypresses
1644 int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm)
1646 unsigned long flags;
1653 struct kbdiacrs __user *a = udp;
1654 struct kbdiacr *dia;
1657 dia = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacr),
1662 /* Lock the diacriticals table, make a copy and then
1663 copy it after we unlock */
1664 spin_lock_irqsave(&kbd_event_lock, flags);
1666 asize = accent_table_size;
1667 for (i = 0; i < asize; i++) {
1668 dia[i].diacr = conv_uni_to_8bit(
1669 accent_table[i].diacr);
1670 dia[i].base = conv_uni_to_8bit(
1671 accent_table[i].base);
1672 dia[i].result = conv_uni_to_8bit(
1673 accent_table[i].result);
1675 spin_unlock_irqrestore(&kbd_event_lock, flags);
1677 if (put_user(asize, &a->kb_cnt))
1679 else if (copy_to_user(a->kbdiacr, dia,
1680 asize * sizeof(struct kbdiacr)))
1687 struct kbdiacrsuc __user *a = udp;
1690 buf = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacruc),
1695 /* Lock the diacriticals table, make a copy and then
1696 copy it after we unlock */
1697 spin_lock_irqsave(&kbd_event_lock, flags);
1699 asize = accent_table_size;
1700 memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc));
1702 spin_unlock_irqrestore(&kbd_event_lock, flags);
1704 if (put_user(asize, &a->kb_cnt))
1706 else if (copy_to_user(a->kbdiacruc, buf,
1707 asize*sizeof(struct kbdiacruc)))
1715 struct kbdiacrs __user *a = udp;
1716 struct kbdiacr *dia = NULL;
1722 if (get_user(ct, &a->kb_cnt))
1724 if (ct >= MAX_DIACR)
1729 dia = memdup_user(a->kbdiacr,
1730 sizeof(struct kbdiacr) * ct);
1732 return PTR_ERR(dia);
1736 spin_lock_irqsave(&kbd_event_lock, flags);
1737 accent_table_size = ct;
1738 for (i = 0; i < ct; i++) {
1739 accent_table[i].diacr =
1740 conv_8bit_to_uni(dia[i].diacr);
1741 accent_table[i].base =
1742 conv_8bit_to_uni(dia[i].base);
1743 accent_table[i].result =
1744 conv_8bit_to_uni(dia[i].result);
1746 spin_unlock_irqrestore(&kbd_event_lock, flags);
1753 struct kbdiacrsuc __user *a = udp;
1760 if (get_user(ct, &a->kb_cnt))
1763 if (ct >= MAX_DIACR)
1767 buf = memdup_user(a->kbdiacruc,
1768 ct * sizeof(struct kbdiacruc));
1770 return PTR_ERR(buf);
1772 spin_lock_irqsave(&kbd_event_lock, flags);
1774 memcpy(accent_table, buf,
1775 ct * sizeof(struct kbdiacruc));
1776 accent_table_size = ct;
1777 spin_unlock_irqrestore(&kbd_event_lock, flags);
1786 * vt_do_kdskbmode - set keyboard mode ioctl
1787 * @console: the console to use
1788 * @arg: the requested mode
1790 * Update the keyboard mode bits while holding the correct locks.
1791 * Return 0 for success or an error code.
1793 int vt_do_kdskbmode(int console, unsigned int arg)
1795 struct kbd_struct *kb = kbd_table + console;
1797 unsigned long flags;
1799 spin_lock_irqsave(&kbd_event_lock, flags);
1802 kb->kbdmode = VC_RAW;
1805 kb->kbdmode = VC_MEDIUMRAW;
1808 kb->kbdmode = VC_XLATE;
1809 do_compute_shiftstate();
1812 kb->kbdmode = VC_UNICODE;
1813 do_compute_shiftstate();
1816 kb->kbdmode = VC_OFF;
1821 spin_unlock_irqrestore(&kbd_event_lock, flags);
1826 * vt_do_kdskbmeta - set keyboard meta state
1827 * @console: the console to use
1828 * @arg: the requested meta state
1830 * Update the keyboard meta bits while holding the correct locks.
1831 * Return 0 for success or an error code.
1833 int vt_do_kdskbmeta(int console, unsigned int arg)
1835 struct kbd_struct *kb = kbd_table + console;
1837 unsigned long flags;
1839 spin_lock_irqsave(&kbd_event_lock, flags);
1842 clr_vc_kbd_mode(kb, VC_META);
1845 set_vc_kbd_mode(kb, VC_META);
1850 spin_unlock_irqrestore(&kbd_event_lock, flags);
1854 int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
1857 struct kbkeycode tmp;
1860 if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
1864 kc = getkeycode(tmp.scancode);
1866 kc = put_user(kc, &user_kbkc->keycode);
1871 kc = setkeycode(tmp.scancode, tmp.keycode);
1877 #define i (tmp.kb_index)
1878 #define s (tmp.kb_table)
1879 #define v (tmp.kb_value)
1881 int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
1884 struct kbd_struct *kb = kbd_table + console;
1886 ushort *key_map, *new_map, val, ov;
1887 unsigned long flags;
1889 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
1892 if (!capable(CAP_SYS_TTY_CONFIG))
1897 /* Ensure another thread doesn't free it under us */
1898 spin_lock_irqsave(&kbd_event_lock, flags);
1899 key_map = key_maps[s];
1901 val = U(key_map[i]);
1902 if (kb->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
1905 val = (i ? K_HOLE : K_NOSUCHMAP);
1906 spin_unlock_irqrestore(&kbd_event_lock, flags);
1907 return put_user(val, &user_kbe->kb_value);
1911 if (!i && v == K_NOSUCHMAP) {
1912 spin_lock_irqsave(&kbd_event_lock, flags);
1913 /* deallocate map */
1914 key_map = key_maps[s];
1917 if (key_map[0] == U(K_ALLOCATED)) {
1922 spin_unlock_irqrestore(&kbd_event_lock, flags);
1926 if (KTYP(v) < NR_TYPES) {
1927 if (KVAL(v) > max_vals[KTYP(v)])
1930 if (kb->kbdmode != VC_UNICODE)
1933 /* ++Geert: non-PC keyboards may generate keycode zero */
1934 #if !defined(__mc68000__) && !defined(__powerpc__)
1935 /* assignment to entry 0 only tests validity of args */
1940 new_map = kmalloc(sizeof(plain_map), GFP_KERNEL);
1943 spin_lock_irqsave(&kbd_event_lock, flags);
1944 key_map = key_maps[s];
1945 if (key_map == NULL) {
1948 if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
1949 !capable(CAP_SYS_RESOURCE)) {
1950 spin_unlock_irqrestore(&kbd_event_lock, flags);
1954 key_maps[s] = new_map;
1956 key_map[0] = U(K_ALLOCATED);
1957 for (j = 1; j < NR_KEYS; j++)
1958 key_map[j] = U(K_HOLE);
1969 if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) {
1970 spin_unlock_irqrestore(&kbd_event_lock, flags);
1974 if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
1975 do_compute_shiftstate();
1977 spin_unlock_irqrestore(&kbd_event_lock, flags);
1986 /* FIXME: This one needs untangling and locking */
1987 int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
1989 struct kbsentry *kbs;
1995 char *first_free, *fj, *fnw;
1999 if (!capable(CAP_SYS_TTY_CONFIG))
2002 kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
2008 /* we mostly copy too much here (512bytes), but who cares ;) */
2009 if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
2013 kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
2018 sz = sizeof(kbs->kb_string) - 1; /* sz should have been
2020 up = user_kdgkb->kb_string;
2023 for ( ; *p && sz; p++, sz--)
2024 if (put_user(*p, up++)) {
2028 if (put_user('\0', up)) {
2033 return ((p && *p) ? -EOVERFLOW : 0);
2041 first_free = funcbufptr + (funcbufsize - funcbufleft);
2042 for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
2044 if (j < MAX_NR_FUNC)
2049 delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
2050 if (delta <= funcbufleft) { /* it fits in current buf */
2051 if (j < MAX_NR_FUNC) {
2052 memmove(fj + delta, fj, first_free - fj);
2053 for (k = j; k < MAX_NR_FUNC; k++)
2055 func_table[k] += delta;
2059 funcbufleft -= delta;
2060 } else { /* allocate a larger buffer */
2062 while (sz < funcbufsize - funcbufleft + delta)
2064 fnw = kmalloc(sz, GFP_KERNEL);
2072 if (fj > funcbufptr)
2073 memmove(fnw, funcbufptr, fj - funcbufptr);
2074 for (k = 0; k < j; k++)
2076 func_table[k] = fnw + (func_table[k] - funcbufptr);
2078 if (first_free > fj) {
2079 memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
2080 for (k = j; k < MAX_NR_FUNC; k++)
2082 func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
2084 if (funcbufptr != func_buf)
2087 funcbufleft = funcbufleft - delta + sz - funcbufsize;
2090 strcpy(func_table[i], kbs->kb_string);
2099 int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
2101 struct kbd_struct *kb = kbd_table + console;
2102 unsigned long flags;
2103 unsigned char ucval;
2106 /* the ioctls below read/set the flags usually shown in the leds */
2107 /* don't use them - they will go away without warning */
2109 spin_lock_irqsave(&kbd_event_lock, flags);
2110 ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);
2111 spin_unlock_irqrestore(&kbd_event_lock, flags);
2112 return put_user(ucval, (char __user *)arg);
2119 spin_lock_irqsave(&led_lock, flags);
2120 kb->ledflagstate = (arg & 7);
2121 kb->default_ledflagstate = ((arg >> 4) & 7);
2123 spin_unlock_irqrestore(&led_lock, flags);
2126 /* the ioctls below only set the lights, not the functions */
2127 /* for those, see KDGKBLED and KDSKBLED above */
2129 ucval = getledstate();
2130 return put_user(ucval, (char __user *)arg);
2135 setledstate(kb, arg);
2138 return -ENOIOCTLCMD;
2141 int vt_do_kdgkbmode(int console)
2143 struct kbd_struct *kb = kbd_table + console;
2144 /* This is a spot read so needs no locking */
2145 switch (kb->kbdmode) {
2160 * vt_do_kdgkbmeta - report meta status
2161 * @console: console to report
2163 * Report the meta flag status of this console
2165 int vt_do_kdgkbmeta(int console)
2167 struct kbd_struct *kb = kbd_table + console;
2168 /* Again a spot read so no locking */
2169 return vc_kbd_mode(kb, VC_META) ? K_ESCPREFIX : K_METABIT;
2173 * vt_reset_unicode - reset the unicode status
2174 * @console: console being reset
2176 * Restore the unicode console state to its default
2178 void vt_reset_unicode(int console)
2180 unsigned long flags;
2182 spin_lock_irqsave(&kbd_event_lock, flags);
2183 kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
2184 spin_unlock_irqrestore(&kbd_event_lock, flags);
2188 * vt_get_shiftstate - shift bit state
2190 * Report the shift bits from the keyboard state. We have to export
2191 * this to support some oddities in the vt layer.
2193 int vt_get_shift_state(void)
2195 /* Don't lock as this is a transient report */
2200 * vt_reset_keyboard - reset keyboard state
2201 * @console: console to reset
2203 * Reset the keyboard bits for a console as part of a general console
2206 void vt_reset_keyboard(int console)
2208 struct kbd_struct *kb = kbd_table + console;
2209 unsigned long flags;
2211 spin_lock_irqsave(&kbd_event_lock, flags);
2212 set_vc_kbd_mode(kb, VC_REPEAT);
2213 clr_vc_kbd_mode(kb, VC_CKMODE);
2214 clr_vc_kbd_mode(kb, VC_APPLIC);
2215 clr_vc_kbd_mode(kb, VC_CRLF);
2218 spin_lock(&led_lock);
2219 kb->ledmode = LED_SHOW_FLAGS;
2220 kb->ledflagstate = kb->default_ledflagstate;
2221 spin_unlock(&led_lock);
2222 /* do not do set_leds here because this causes an endless tasklet loop
2223 when the keyboard hasn't been initialized yet */
2224 spin_unlock_irqrestore(&kbd_event_lock, flags);
2228 * vt_get_kbd_mode_bit - read keyboard status bits
2229 * @console: console to read from
2230 * @bit: mode bit to read
2232 * Report back a vt mode bit. We do this without locking so the
2233 * caller must be sure that there are no synchronization needs
2236 int vt_get_kbd_mode_bit(int console, int bit)
2238 struct kbd_struct *kb = kbd_table + console;
2239 return vc_kbd_mode(kb, bit);
2243 * vt_set_kbd_mode_bit - read keyboard status bits
2244 * @console: console to read from
2245 * @bit: mode bit to read
2247 * Set a vt mode bit. We do this without locking so the
2248 * caller must be sure that there are no synchronization needs
2251 void vt_set_kbd_mode_bit(int console, int bit)
2253 struct kbd_struct *kb = kbd_table + console;
2254 unsigned long flags;
2256 spin_lock_irqsave(&kbd_event_lock, flags);
2257 set_vc_kbd_mode(kb, bit);
2258 spin_unlock_irqrestore(&kbd_event_lock, flags);
2262 * vt_clr_kbd_mode_bit - read keyboard status bits
2263 * @console: console to read from
2264 * @bit: mode bit to read
2266 * Report back a vt mode bit. We do this without locking so the
2267 * caller must be sure that there are no synchronization needs
2270 void vt_clr_kbd_mode_bit(int console, int bit)
2272 struct kbd_struct *kb = kbd_table + console;
2273 unsigned long flags;
2275 spin_lock_irqsave(&kbd_event_lock, flags);
2276 clr_vc_kbd_mode(kb, bit);
2277 spin_unlock_irqrestore(&kbd_event_lock, flags);