2 * Written for linux by Johan Myreen as a translation from
3 * the assembly version by Linus (with diacriticals added)
5 * Some additional features added by Christoph Niemann (ChN), March 1993
7 * Loadable keymaps by Risto Kankkunen, May 1993
9 * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993
10 * Added decr/incr_console, dynamic keymaps, Unicode support,
11 * dynamic function/string keys, led setting, Sept 1994
12 * `Sticky' modifier keys, 951006.
14 * 11-11-96: SAK should now work in the raw mode (Martin Mares)
16 * Modified to provide 'generic' keyboard support by Hamish Macdonald
17 * Merge with the m68k keyboard driver and split-off of the PC low-level
18 * parts by Geert Uytterhoeven, May 1997
20 * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
21 * 30-07-98: Dead keys redone, aeb@cwi.nl.
22 * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27 #include <linux/consolemap.h>
28 #include <linux/module.h>
29 #include <linux/sched/signal.h>
30 #include <linux/sched/debug.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(unsigned long ignored)
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, 0, 0);
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] = {'`', '\'', '^', '~', '"', ',' };
695 k_deadunicode(vc, ret_diacr[value], up_flag);
698 static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
706 static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
711 if ((unsigned)value < ARRAY_SIZE(func_table)) {
712 if (func_table[value])
713 puts_queue(vc, func_table[value]);
715 pr_err("k_fn called with value=%d\n", value);
718 static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
720 static const char cur_chars[] = "BDCA";
725 applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
728 static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
730 static const char pad_chars[] = "0123456789+-*/\015,.?()#";
731 static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
734 return; /* no action, if this is a key release */
736 /* kludge... shift forces cursor/number keys */
737 if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
738 applkey(vc, app_map[value], 1);
742 if (!vc_kbd_led(kbd, VC_NUMLOCK)) {
747 k_fn(vc, KVAL(K_REMOVE), 0);
750 k_fn(vc, KVAL(K_INSERT), 0);
753 k_fn(vc, KVAL(K_SELECT), 0);
756 k_cur(vc, KVAL(K_DOWN), 0);
759 k_fn(vc, KVAL(K_PGDN), 0);
762 k_cur(vc, KVAL(K_LEFT), 0);
765 k_cur(vc, KVAL(K_RIGHT), 0);
768 k_fn(vc, KVAL(K_FIND), 0);
771 k_cur(vc, KVAL(K_UP), 0);
774 k_fn(vc, KVAL(K_PGUP), 0);
777 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
782 put_queue(vc, pad_chars[value]);
783 if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
787 static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
789 int old_state = shift_state;
795 * a CapsShift key acts like Shift but undoes CapsLock
797 if (value == KVAL(K_CAPSSHIFT)) {
798 value = KVAL(K_SHIFT);
800 clr_vc_kbd_led(kbd, VC_CAPSLOCK);
805 * handle the case that two shift or control
806 * keys are depressed simultaneously
808 if (shift_down[value])
813 if (shift_down[value])
814 shift_state |= (1 << value);
816 shift_state &= ~(1 << value);
819 if (up_flag && shift_state != old_state && npadch != -1) {
820 if (kbd->kbdmode == VC_UNICODE)
823 put_queue(vc, npadch & 0xff);
828 static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
833 if (vc_kbd_mode(kbd, VC_META)) {
834 put_queue(vc, '\033');
835 put_queue(vc, value);
837 put_queue(vc, value | 0x80);
840 static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
848 /* decimal input of code, while Alt depressed */
851 /* hexadecimal input of code, while AltGr depressed */
859 npadch = npadch * base + value;
862 static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
867 chg_vc_kbd_lock(kbd, value);
870 static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
872 k_shift(vc, value, up_flag);
876 chg_vc_kbd_slock(kbd, value);
877 /* try to make Alt, oops, AltGr and such work */
878 if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
880 chg_vc_kbd_slock(kbd, value);
884 /* by default, 300ms interval for combination release */
885 static unsigned brl_timeout = 300;
886 MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
887 module_param(brl_timeout, uint, 0644);
889 static unsigned brl_nbchords = 1;
890 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
891 module_param(brl_nbchords, uint, 0644);
893 static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
895 static unsigned long chords;
896 static unsigned committed;
899 k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
901 committed |= pattern;
903 if (chords == brl_nbchords) {
904 k_unicode(vc, BRL_UC_ROW | committed, up_flag);
911 static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
913 static unsigned pressed, committing;
914 static unsigned long releasestart;
916 if (kbd->kbdmode != VC_UNICODE) {
918 pr_warn("keyboard mode must be unicode for braille patterns\n");
923 k_unicode(vc, BRL_UC_ROW, up_flag);
931 pressed |= 1 << (value - 1);
933 committing = pressed;
934 } else if (brl_timeout) {
937 releasestart + msecs_to_jiffies(brl_timeout))) {
938 committing = pressed;
939 releasestart = jiffies;
941 pressed &= ~(1 << (value - 1));
942 if (!pressed && committing) {
943 k_brlcommit(vc, committing, 0);
948 k_brlcommit(vc, committing, 0);
951 pressed &= ~(1 << (value - 1));
955 #if IS_ENABLED(CONFIG_INPUT_LEDS) && IS_ENABLED(CONFIG_LEDS_TRIGGERS)
957 struct kbd_led_trigger {
958 struct led_trigger trigger;
962 static void kbd_led_trigger_activate(struct led_classdev *cdev)
964 struct kbd_led_trigger *trigger =
965 container_of(cdev->trigger, struct kbd_led_trigger, trigger);
967 tasklet_disable(&keyboard_tasklet);
969 led_trigger_event(&trigger->trigger,
970 ledstate & trigger->mask ?
972 tasklet_enable(&keyboard_tasklet);
975 #define KBD_LED_TRIGGER(_led_bit, _name) { \
978 .activate = kbd_led_trigger_activate, \
980 .mask = BIT(_led_bit), \
983 #define KBD_LOCKSTATE_TRIGGER(_led_bit, _name) \
984 KBD_LED_TRIGGER((_led_bit) + 8, _name)
986 static struct kbd_led_trigger kbd_led_triggers[] = {
987 KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
988 KBD_LED_TRIGGER(VC_NUMLOCK, "kbd-numlock"),
989 KBD_LED_TRIGGER(VC_CAPSLOCK, "kbd-capslock"),
990 KBD_LED_TRIGGER(VC_KANALOCK, "kbd-kanalock"),
992 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK, "kbd-shiftlock"),
993 KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK, "kbd-altgrlock"),
994 KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK, "kbd-ctrllock"),
995 KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK, "kbd-altlock"),
996 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
997 KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
998 KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK, "kbd-ctrlllock"),
999 KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK, "kbd-ctrlrlock"),
1002 static void kbd_propagate_led_state(unsigned int old_state,
1003 unsigned int new_state)
1005 struct kbd_led_trigger *trigger;
1006 unsigned int changed = old_state ^ new_state;
1009 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1010 trigger = &kbd_led_triggers[i];
1012 if (changed & trigger->mask)
1013 led_trigger_event(&trigger->trigger,
1014 new_state & trigger->mask ?
1015 LED_FULL : LED_OFF);
1019 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1021 unsigned int led_state = *(unsigned int *)data;
1023 if (test_bit(EV_LED, handle->dev->evbit))
1024 kbd_propagate_led_state(~led_state, led_state);
1029 static void kbd_init_leds(void)
1034 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1035 error = led_trigger_register(&kbd_led_triggers[i].trigger);
1037 pr_err("error %d while registering trigger %s\n",
1038 error, kbd_led_triggers[i].trigger.name);
1044 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1046 unsigned int leds = *(unsigned int *)data;
1048 if (test_bit(EV_LED, handle->dev->evbit)) {
1049 input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
1050 input_inject_event(handle, EV_LED, LED_NUML, !!(leds & 0x02));
1051 input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & 0x04));
1052 input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
1058 static void kbd_propagate_led_state(unsigned int old_state,
1059 unsigned int new_state)
1061 input_handler_for_each_handle(&kbd_handler, &new_state,
1062 kbd_update_leds_helper);
1065 static void kbd_init_leds(void)
1072 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
1073 * or (ii) whatever pattern of lights people want to show using KDSETLED,
1074 * or (iii) specified bits of specified words in kernel memory.
1076 static unsigned char getledstate(void)
1078 return ledstate & 0xff;
1081 void setledstate(struct kbd_struct *kb, unsigned int led)
1083 unsigned long flags;
1084 spin_lock_irqsave(&led_lock, flags);
1087 kb->ledmode = LED_SHOW_IOCTL;
1089 kb->ledmode = LED_SHOW_FLAGS;
1092 spin_unlock_irqrestore(&led_lock, flags);
1095 static inline unsigned char getleds(void)
1097 struct kbd_struct *kb = kbd_table + fg_console;
1099 if (kb->ledmode == LED_SHOW_IOCTL)
1102 return kb->ledflagstate;
1106 * vt_get_leds - helper for braille console
1107 * @console: console to read
1108 * @flag: flag we want to check
1110 * Check the status of a keyboard led flag and report it back
1112 int vt_get_leds(int console, int flag)
1114 struct kbd_struct *kb = kbd_table + console;
1116 unsigned long flags;
1118 spin_lock_irqsave(&led_lock, flags);
1119 ret = vc_kbd_led(kb, flag);
1120 spin_unlock_irqrestore(&led_lock, flags);
1124 EXPORT_SYMBOL_GPL(vt_get_leds);
1127 * vt_set_led_state - set LED state of a console
1128 * @console: console to set
1131 * Set the LEDs on a console. This is a wrapper for the VT layer
1132 * so that we can keep kbd knowledge internal
1134 void vt_set_led_state(int console, int leds)
1136 struct kbd_struct *kb = kbd_table + console;
1137 setledstate(kb, leds);
1141 * vt_kbd_con_start - Keyboard side of console start
1144 * Handle console start. This is a wrapper for the VT layer
1145 * so that we can keep kbd knowledge internal
1147 * FIXME: We eventually need to hold the kbd lock here to protect
1148 * the LED updating. We can't do it yet because fn_hold calls stop_tty
1149 * and start_tty under the kbd_event_lock, while normal tty paths
1150 * don't hold the lock. We probably need to split out an LED lock
1151 * but not during an -rc release!
1153 void vt_kbd_con_start(int console)
1155 struct kbd_struct *kb = kbd_table + console;
1156 unsigned long flags;
1157 spin_lock_irqsave(&led_lock, flags);
1158 clr_vc_kbd_led(kb, VC_SCROLLOCK);
1160 spin_unlock_irqrestore(&led_lock, flags);
1164 * vt_kbd_con_stop - Keyboard side of console stop
1167 * Handle console stop. This is a wrapper for the VT layer
1168 * so that we can keep kbd knowledge internal
1170 void vt_kbd_con_stop(int console)
1172 struct kbd_struct *kb = kbd_table + console;
1173 unsigned long flags;
1174 spin_lock_irqsave(&led_lock, flags);
1175 set_vc_kbd_led(kb, VC_SCROLLOCK);
1177 spin_unlock_irqrestore(&led_lock, flags);
1181 * This is the tasklet that updates LED state of LEDs using standard
1182 * keyboard triggers. The reason we use tasklet is that we need to
1183 * handle the scenario when keyboard handler is not registered yet
1184 * but we already getting updates from the VT to update led state.
1186 static void kbd_bh(unsigned long dummy)
1189 unsigned long flags;
1191 spin_lock_irqsave(&led_lock, flags);
1193 leds |= (unsigned int)kbd->lockstate << 8;
1194 spin_unlock_irqrestore(&led_lock, flags);
1196 if (leds != ledstate) {
1197 kbd_propagate_led_state(ledstate, leds);
1202 DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
1204 #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
1205 defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
1206 defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
1207 (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC)) ||\
1208 defined(CONFIG_AVR32)
1210 #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
1211 ((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
1213 static const unsigned short x86_keycodes[256] =
1214 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
1215 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
1216 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
1217 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
1218 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
1219 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
1220 284,285,309, 0,312, 91,327,328,329,331,333,335,336,337,338,339,
1221 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
1222 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
1223 103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
1224 291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
1225 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
1226 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
1227 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
1228 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
1231 static int sparc_l1_a_state;
1232 extern void sun_do_break(void);
1235 static int emulate_raw(struct vc_data *vc, unsigned int keycode,
1236 unsigned char up_flag)
1243 put_queue(vc, 0xe1);
1244 put_queue(vc, 0x1d | up_flag);
1245 put_queue(vc, 0x45 | up_flag);
1250 put_queue(vc, 0xf2);
1255 put_queue(vc, 0xf1);
1260 * Real AT keyboards (that's what we're trying
1261 * to emulate here) emit 0xe0 0x2a 0xe0 0x37 when
1262 * pressing PrtSc/SysRq alone, but simply 0x54
1263 * when pressing Alt+PrtSc/SysRq.
1265 if (test_bit(KEY_LEFTALT, key_down) ||
1266 test_bit(KEY_RIGHTALT, key_down)) {
1267 put_queue(vc, 0x54 | up_flag);
1269 put_queue(vc, 0xe0);
1270 put_queue(vc, 0x2a | up_flag);
1271 put_queue(vc, 0xe0);
1272 put_queue(vc, 0x37 | up_flag);
1280 code = x86_keycodes[keycode];
1285 put_queue(vc, 0xe0);
1286 put_queue(vc, (code & 0x7f) | up_flag);
1296 #define HW_RAW(dev) 0
1298 static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
1303 put_queue(vc, keycode | up_flag);
1308 static void kbd_rawcode(unsigned char data)
1310 struct vc_data *vc = vc_cons[fg_console].d;
1312 kbd = kbd_table + vc->vc_num;
1313 if (kbd->kbdmode == VC_RAW)
1314 put_queue(vc, data);
1317 static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
1319 struct vc_data *vc = vc_cons[fg_console].d;
1320 unsigned short keysym, *key_map;
1323 struct tty_struct *tty;
1325 struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
1330 if (tty && (!tty->driver_data)) {
1331 /* No driver data? Strange. Okay we fix it then. */
1332 tty->driver_data = vc;
1335 kbd = kbd_table + vc->vc_num;
1338 if (keycode == KEY_STOP)
1339 sparc_l1_a_state = down;
1344 raw_mode = (kbd->kbdmode == VC_RAW);
1345 if (raw_mode && !hw_raw)
1346 if (emulate_raw(vc, keycode, !down << 7))
1347 if (keycode < BTN_MISC && printk_ratelimit())
1348 pr_warn("can't emulate rawmode for keycode %d\n",
1352 if (keycode == KEY_A && sparc_l1_a_state) {
1353 sparc_l1_a_state = false;
1358 if (kbd->kbdmode == VC_MEDIUMRAW) {
1360 * This is extended medium raw mode, with keys above 127
1361 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
1362 * the 'up' flag if needed. 0 is reserved, so this shouldn't
1363 * interfere with anything else. The two bytes after 0 will
1364 * always have the up flag set not to interfere with older
1365 * applications. This allows for 16384 different keycodes,
1366 * which should be enough.
1368 if (keycode < 128) {
1369 put_queue(vc, keycode | (!down << 7));
1371 put_queue(vc, !down << 7);
1372 put_queue(vc, (keycode >> 7) | 0x80);
1373 put_queue(vc, keycode | 0x80);
1379 set_bit(keycode, key_down);
1381 clear_bit(keycode, key_down);
1384 (!vc_kbd_mode(kbd, VC_REPEAT) ||
1385 (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
1387 * Don't repeat a key if the input buffers are not empty and the
1388 * characters get aren't echoed locally. This makes key repeat
1389 * usable with slow applications and under heavy loads.
1394 param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
1395 param.ledstate = kbd->ledflagstate;
1396 key_map = key_maps[shift_final];
1398 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1399 KBD_KEYCODE, ¶m);
1400 if (rc == NOTIFY_STOP || !key_map) {
1401 atomic_notifier_call_chain(&keyboard_notifier_list,
1402 KBD_UNBOUND_KEYCODE, ¶m);
1403 do_compute_shiftstate();
1404 kbd->slockstate = 0;
1408 if (keycode < NR_KEYS)
1409 keysym = key_map[keycode];
1410 else if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
1411 keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
1415 type = KTYP(keysym);
1418 param.value = keysym;
1419 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1420 KBD_UNICODE, ¶m);
1421 if (rc != NOTIFY_STOP)
1422 if (down && !raw_mode)
1423 to_utf8(vc, keysym);
1429 if (type == KT_LETTER) {
1431 if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
1432 key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
1434 keysym = key_map[keycode];
1438 param.value = keysym;
1439 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1440 KBD_KEYSYM, ¶m);
1441 if (rc == NOTIFY_STOP)
1444 if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)
1447 (*k_handler[type])(vc, keysym & 0xff, !down);
1449 param.ledstate = kbd->ledflagstate;
1450 atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, ¶m);
1452 if (type != KT_SLOCK)
1453 kbd->slockstate = 0;
1456 static void kbd_event(struct input_handle *handle, unsigned int event_type,
1457 unsigned int event_code, int value)
1459 /* We are called with interrupts disabled, just take the lock */
1460 spin_lock(&kbd_event_lock);
1462 if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
1464 if (event_type == EV_KEY)
1465 kbd_keycode(event_code, value, HW_RAW(handle->dev));
1467 spin_unlock(&kbd_event_lock);
1469 tasklet_schedule(&keyboard_tasklet);
1470 do_poke_blanked_console = 1;
1471 schedule_console_callback();
1474 static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
1478 if (test_bit(EV_SND, dev->evbit))
1481 if (test_bit(EV_KEY, dev->evbit)) {
1482 for (i = KEY_RESERVED; i < BTN_MISC; i++)
1483 if (test_bit(i, dev->keybit))
1485 for (i = KEY_BRL_DOT1; i <= KEY_BRL_DOT10; i++)
1486 if (test_bit(i, dev->keybit))
1494 * When a keyboard (or other input device) is found, the kbd_connect
1495 * function is called. The function then looks at the device, and if it
1496 * likes it, it can open it and get events from it. In this (kbd_connect)
1497 * function, we should decide which VT to bind that keyboard to initially.
1499 static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
1500 const struct input_device_id *id)
1502 struct input_handle *handle;
1505 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
1510 handle->handler = handler;
1511 handle->name = "kbd";
1513 error = input_register_handle(handle);
1515 goto err_free_handle;
1517 error = input_open_device(handle);
1519 goto err_unregister_handle;
1523 err_unregister_handle:
1524 input_unregister_handle(handle);
1530 static void kbd_disconnect(struct input_handle *handle)
1532 input_close_device(handle);
1533 input_unregister_handle(handle);
1538 * Start keyboard handler on the new keyboard by refreshing LED state to
1539 * match the rest of the system.
1541 static void kbd_start(struct input_handle *handle)
1543 tasklet_disable(&keyboard_tasklet);
1545 if (ledstate != -1U)
1546 kbd_update_leds_helper(handle, &ledstate);
1548 tasklet_enable(&keyboard_tasklet);
1551 static const struct input_device_id kbd_ids[] = {
1553 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1554 .evbit = { BIT_MASK(EV_KEY) },
1558 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1559 .evbit = { BIT_MASK(EV_SND) },
1562 { }, /* Terminating entry */
1565 MODULE_DEVICE_TABLE(input, kbd_ids);
1567 static struct input_handler kbd_handler = {
1570 .connect = kbd_connect,
1571 .disconnect = kbd_disconnect,
1574 .id_table = kbd_ids,
1577 int __init kbd_init(void)
1582 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1583 kbd_table[i].ledflagstate = kbd_defleds();
1584 kbd_table[i].default_ledflagstate = kbd_defleds();
1585 kbd_table[i].ledmode = LED_SHOW_FLAGS;
1586 kbd_table[i].lockstate = KBD_DEFLOCK;
1587 kbd_table[i].slockstate = 0;
1588 kbd_table[i].modeflags = KBD_DEFMODE;
1589 kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
1594 error = input_register_handler(&kbd_handler);
1598 tasklet_enable(&keyboard_tasklet);
1599 tasklet_schedule(&keyboard_tasklet);
1604 /* Ioctl support code */
1607 * vt_do_diacrit - diacritical table updates
1608 * @cmd: ioctl request
1609 * @udp: pointer to user data for ioctl
1610 * @perm: permissions check computed by caller
1612 * Update the diacritical tables atomically and safely. Lock them
1613 * against simultaneous keypresses
1615 int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm)
1617 unsigned long flags;
1624 struct kbdiacrs __user *a = udp;
1625 struct kbdiacr *dia;
1628 dia = kmalloc(MAX_DIACR * sizeof(struct kbdiacr),
1633 /* Lock the diacriticals table, make a copy and then
1634 copy it after we unlock */
1635 spin_lock_irqsave(&kbd_event_lock, flags);
1637 asize = accent_table_size;
1638 for (i = 0; i < asize; i++) {
1639 dia[i].diacr = conv_uni_to_8bit(
1640 accent_table[i].diacr);
1641 dia[i].base = conv_uni_to_8bit(
1642 accent_table[i].base);
1643 dia[i].result = conv_uni_to_8bit(
1644 accent_table[i].result);
1646 spin_unlock_irqrestore(&kbd_event_lock, flags);
1648 if (put_user(asize, &a->kb_cnt))
1650 else if (copy_to_user(a->kbdiacr, dia,
1651 asize * sizeof(struct kbdiacr)))
1658 struct kbdiacrsuc __user *a = udp;
1661 buf = kmalloc(MAX_DIACR * sizeof(struct kbdiacruc),
1666 /* Lock the diacriticals table, make a copy and then
1667 copy it after we unlock */
1668 spin_lock_irqsave(&kbd_event_lock, flags);
1670 asize = accent_table_size;
1671 memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc));
1673 spin_unlock_irqrestore(&kbd_event_lock, flags);
1675 if (put_user(asize, &a->kb_cnt))
1677 else if (copy_to_user(a->kbdiacruc, buf,
1678 asize*sizeof(struct kbdiacruc)))
1686 struct kbdiacrs __user *a = udp;
1687 struct kbdiacr *dia = NULL;
1693 if (get_user(ct, &a->kb_cnt))
1695 if (ct >= MAX_DIACR)
1700 dia = memdup_user(a->kbdiacr,
1701 sizeof(struct kbdiacr) * ct);
1703 return PTR_ERR(dia);
1707 spin_lock_irqsave(&kbd_event_lock, flags);
1708 accent_table_size = ct;
1709 for (i = 0; i < ct; i++) {
1710 accent_table[i].diacr =
1711 conv_8bit_to_uni(dia[i].diacr);
1712 accent_table[i].base =
1713 conv_8bit_to_uni(dia[i].base);
1714 accent_table[i].result =
1715 conv_8bit_to_uni(dia[i].result);
1717 spin_unlock_irqrestore(&kbd_event_lock, flags);
1724 struct kbdiacrsuc __user *a = udp;
1731 if (get_user(ct, &a->kb_cnt))
1734 if (ct >= MAX_DIACR)
1738 buf = memdup_user(a->kbdiacruc,
1739 ct * sizeof(struct kbdiacruc));
1741 return PTR_ERR(buf);
1743 spin_lock_irqsave(&kbd_event_lock, flags);
1745 memcpy(accent_table, buf,
1746 ct * sizeof(struct kbdiacruc));
1747 accent_table_size = ct;
1748 spin_unlock_irqrestore(&kbd_event_lock, flags);
1757 * vt_do_kdskbmode - set keyboard mode ioctl
1758 * @console: the console to use
1759 * @arg: the requested mode
1761 * Update the keyboard mode bits while holding the correct locks.
1762 * Return 0 for success or an error code.
1764 int vt_do_kdskbmode(int console, unsigned int arg)
1766 struct kbd_struct *kb = kbd_table + console;
1768 unsigned long flags;
1770 spin_lock_irqsave(&kbd_event_lock, flags);
1773 kb->kbdmode = VC_RAW;
1776 kb->kbdmode = VC_MEDIUMRAW;
1779 kb->kbdmode = VC_XLATE;
1780 do_compute_shiftstate();
1783 kb->kbdmode = VC_UNICODE;
1784 do_compute_shiftstate();
1787 kb->kbdmode = VC_OFF;
1792 spin_unlock_irqrestore(&kbd_event_lock, flags);
1797 * vt_do_kdskbmeta - set keyboard meta state
1798 * @console: the console to use
1799 * @arg: the requested meta state
1801 * Update the keyboard meta bits while holding the correct locks.
1802 * Return 0 for success or an error code.
1804 int vt_do_kdskbmeta(int console, unsigned int arg)
1806 struct kbd_struct *kb = kbd_table + console;
1808 unsigned long flags;
1810 spin_lock_irqsave(&kbd_event_lock, flags);
1813 clr_vc_kbd_mode(kb, VC_META);
1816 set_vc_kbd_mode(kb, VC_META);
1821 spin_unlock_irqrestore(&kbd_event_lock, flags);
1825 int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
1828 struct kbkeycode tmp;
1831 if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
1835 kc = getkeycode(tmp.scancode);
1837 kc = put_user(kc, &user_kbkc->keycode);
1842 kc = setkeycode(tmp.scancode, tmp.keycode);
1848 #define i (tmp.kb_index)
1849 #define s (tmp.kb_table)
1850 #define v (tmp.kb_value)
1852 int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
1855 struct kbd_struct *kb = kbd_table + console;
1857 ushort *key_map, *new_map, val, ov;
1858 unsigned long flags;
1860 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
1863 if (!capable(CAP_SYS_TTY_CONFIG))
1868 /* Ensure another thread doesn't free it under us */
1869 spin_lock_irqsave(&kbd_event_lock, flags);
1870 key_map = key_maps[s];
1872 val = U(key_map[i]);
1873 if (kb->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
1876 val = (i ? K_HOLE : K_NOSUCHMAP);
1877 spin_unlock_irqrestore(&kbd_event_lock, flags);
1878 return put_user(val, &user_kbe->kb_value);
1882 if (!i && v == K_NOSUCHMAP) {
1883 spin_lock_irqsave(&kbd_event_lock, flags);
1884 /* deallocate map */
1885 key_map = key_maps[s];
1888 if (key_map[0] == U(K_ALLOCATED)) {
1893 spin_unlock_irqrestore(&kbd_event_lock, flags);
1897 if (KTYP(v) < NR_TYPES) {
1898 if (KVAL(v) > max_vals[KTYP(v)])
1901 if (kb->kbdmode != VC_UNICODE)
1904 /* ++Geert: non-PC keyboards may generate keycode zero */
1905 #if !defined(__mc68000__) && !defined(__powerpc__)
1906 /* assignment to entry 0 only tests validity of args */
1911 new_map = kmalloc(sizeof(plain_map), GFP_KERNEL);
1914 spin_lock_irqsave(&kbd_event_lock, flags);
1915 key_map = key_maps[s];
1916 if (key_map == NULL) {
1919 if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
1920 !capable(CAP_SYS_RESOURCE)) {
1921 spin_unlock_irqrestore(&kbd_event_lock, flags);
1925 key_maps[s] = new_map;
1927 key_map[0] = U(K_ALLOCATED);
1928 for (j = 1; j < NR_KEYS; j++)
1929 key_map[j] = U(K_HOLE);
1940 if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) {
1941 spin_unlock_irqrestore(&kbd_event_lock, flags);
1945 if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
1946 do_compute_shiftstate();
1948 spin_unlock_irqrestore(&kbd_event_lock, flags);
1957 /* FIXME: This one needs untangling and locking */
1958 int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
1960 struct kbsentry *kbs;
1966 char *first_free, *fj, *fnw;
1970 if (!capable(CAP_SYS_TTY_CONFIG))
1973 kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
1979 /* we mostly copy too much here (512bytes), but who cares ;) */
1980 if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
1984 kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
1989 sz = sizeof(kbs->kb_string) - 1; /* sz should have been
1991 up = user_kdgkb->kb_string;
1994 for ( ; *p && sz; p++, sz--)
1995 if (put_user(*p, up++)) {
1999 if (put_user('\0', up)) {
2004 return ((p && *p) ? -EOVERFLOW : 0);
2012 first_free = funcbufptr + (funcbufsize - funcbufleft);
2013 for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
2015 if (j < MAX_NR_FUNC)
2020 delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
2021 if (delta <= funcbufleft) { /* it fits in current buf */
2022 if (j < MAX_NR_FUNC) {
2023 memmove(fj + delta, fj, first_free - fj);
2024 for (k = j; k < MAX_NR_FUNC; k++)
2026 func_table[k] += delta;
2030 funcbufleft -= delta;
2031 } else { /* allocate a larger buffer */
2033 while (sz < funcbufsize - funcbufleft + delta)
2035 fnw = kmalloc(sz, GFP_KERNEL);
2043 if (fj > funcbufptr)
2044 memmove(fnw, funcbufptr, fj - funcbufptr);
2045 for (k = 0; k < j; k++)
2047 func_table[k] = fnw + (func_table[k] - funcbufptr);
2049 if (first_free > fj) {
2050 memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
2051 for (k = j; k < MAX_NR_FUNC; k++)
2053 func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
2055 if (funcbufptr != func_buf)
2058 funcbufleft = funcbufleft - delta + sz - funcbufsize;
2061 strcpy(func_table[i], kbs->kb_string);
2070 int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
2072 struct kbd_struct *kb = kbd_table + console;
2073 unsigned long flags;
2074 unsigned char ucval;
2077 /* the ioctls below read/set the flags usually shown in the leds */
2078 /* don't use them - they will go away without warning */
2080 spin_lock_irqsave(&kbd_event_lock, flags);
2081 ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);
2082 spin_unlock_irqrestore(&kbd_event_lock, flags);
2083 return put_user(ucval, (char __user *)arg);
2090 spin_lock_irqsave(&led_lock, flags);
2091 kb->ledflagstate = (arg & 7);
2092 kb->default_ledflagstate = ((arg >> 4) & 7);
2094 spin_unlock_irqrestore(&led_lock, flags);
2097 /* the ioctls below only set the lights, not the functions */
2098 /* for those, see KDGKBLED and KDSKBLED above */
2100 ucval = getledstate();
2101 return put_user(ucval, (char __user *)arg);
2106 setledstate(kb, arg);
2109 return -ENOIOCTLCMD;
2112 int vt_do_kdgkbmode(int console)
2114 struct kbd_struct *kb = kbd_table + console;
2115 /* This is a spot read so needs no locking */
2116 switch (kb->kbdmode) {
2131 * vt_do_kdgkbmeta - report meta status
2132 * @console: console to report
2134 * Report the meta flag status of this console
2136 int vt_do_kdgkbmeta(int console)
2138 struct kbd_struct *kb = kbd_table + console;
2139 /* Again a spot read so no locking */
2140 return vc_kbd_mode(kb, VC_META) ? K_ESCPREFIX : K_METABIT;
2144 * vt_reset_unicode - reset the unicode status
2145 * @console: console being reset
2147 * Restore the unicode console state to its default
2149 void vt_reset_unicode(int console)
2151 unsigned long flags;
2153 spin_lock_irqsave(&kbd_event_lock, flags);
2154 kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
2155 spin_unlock_irqrestore(&kbd_event_lock, flags);
2159 * vt_get_shiftstate - shift bit state
2161 * Report the shift bits from the keyboard state. We have to export
2162 * this to support some oddities in the vt layer.
2164 int vt_get_shift_state(void)
2166 /* Don't lock as this is a transient report */
2171 * vt_reset_keyboard - reset keyboard state
2172 * @console: console to reset
2174 * Reset the keyboard bits for a console as part of a general console
2177 void vt_reset_keyboard(int console)
2179 struct kbd_struct *kb = kbd_table + console;
2180 unsigned long flags;
2182 spin_lock_irqsave(&kbd_event_lock, flags);
2183 set_vc_kbd_mode(kb, VC_REPEAT);
2184 clr_vc_kbd_mode(kb, VC_CKMODE);
2185 clr_vc_kbd_mode(kb, VC_APPLIC);
2186 clr_vc_kbd_mode(kb, VC_CRLF);
2189 spin_lock(&led_lock);
2190 kb->ledmode = LED_SHOW_FLAGS;
2191 kb->ledflagstate = kb->default_ledflagstate;
2192 spin_unlock(&led_lock);
2193 /* do not do set_leds here because this causes an endless tasklet loop
2194 when the keyboard hasn't been initialized yet */
2195 spin_unlock_irqrestore(&kbd_event_lock, flags);
2199 * vt_get_kbd_mode_bit - read keyboard status bits
2200 * @console: console to read from
2201 * @bit: mode bit to read
2203 * Report back a vt mode bit. We do this without locking so the
2204 * caller must be sure that there are no synchronization needs
2207 int vt_get_kbd_mode_bit(int console, int bit)
2209 struct kbd_struct *kb = kbd_table + console;
2210 return vc_kbd_mode(kb, bit);
2214 * vt_set_kbd_mode_bit - read keyboard status bits
2215 * @console: console to read from
2216 * @bit: mode bit to read
2218 * Set a vt mode bit. We do this without locking so the
2219 * caller must be sure that there are no synchronization needs
2222 void vt_set_kbd_mode_bit(int console, int bit)
2224 struct kbd_struct *kb = kbd_table + console;
2225 unsigned long flags;
2227 spin_lock_irqsave(&kbd_event_lock, flags);
2228 set_vc_kbd_mode(kb, bit);
2229 spin_unlock_irqrestore(&kbd_event_lock, flags);
2233 * vt_clr_kbd_mode_bit - read keyboard status bits
2234 * @console: console to read from
2235 * @bit: mode bit to read
2237 * Report back a vt mode bit. We do this without locking so the
2238 * caller must be sure that there are no synchronization needs
2241 void vt_clr_kbd_mode_bit(int console, int bit)
2243 struct kbd_struct *kb = kbd_table + console;
2244 unsigned long flags;
2246 spin_lock_irqsave(&kbd_event_lock, flags);
2247 clr_vc_kbd_mode(kb, bit);
2248 spin_unlock_irqrestore(&kbd_event_lock, flags);