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
10 * Diacriticals redone & other small changes, aeb@cwi.nl, June 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)
22 * 30-07-98: Dead keys redone, aeb@cwi.nl.
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/nospec.h>
36 #include <linux/string.h>
37 #include <linux/init.h>
38 #include <linux/slab.h>
39 #include <linux/leds.h>
41 #include <linux/kbd_kern.h>
42 #include <linux/kbd_diacr.h>
43 #include <linux/vt_kern.h>
44 #include <linux/input.h>
45 #include <linux/reboot.h>
46 #include <linux/notifier.h>
47 #include <linux/jiffies.h>
48 #include <linux/uaccess.h>
50 #include <asm/irq_regs.h>
52 extern void ctrl_alt_del(void);
55 * Exported functions/variables
58 #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
60 #if defined(CONFIG_X86) || defined(CONFIG_PARISC)
61 #include <asm/kbdleds.h>
63 static inline int kbd_defleds(void)
76 k_self, k_fn, k_spec, k_pad,\
77 k_dead, k_cons, k_cur, k_shift,\
78 k_meta, k_ascii, k_lock, k_lowercase,\
79 k_slock, k_dead2, k_brl, k_ignore
81 typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
83 static k_handler_fn K_HANDLERS;
84 static k_handler_fn *k_handler[16] = { K_HANDLERS };
87 fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\
88 fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\
89 fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\
90 fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\
91 fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num
93 typedef void (fn_handler_fn)(struct vc_data *vc);
94 static fn_handler_fn FN_HANDLERS;
95 static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
98 * Variables exported for vt_ioctl.c
101 struct vt_spawn_console vt_spawn_con = {
102 .lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock),
112 static struct kbd_struct kbd_table[MAX_NR_CONSOLES];
113 static struct kbd_struct *kbd = kbd_table;
115 /* maximum values each key_handler can handle */
116 static const int max_vals[] = {
117 255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
118 NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
119 255, NR_LOCK - 1, 255, NR_BRL - 1
122 static const int NR_TYPES = ARRAY_SIZE(max_vals);
124 static struct input_handler kbd_handler;
125 static DEFINE_SPINLOCK(kbd_event_lock);
126 static DEFINE_SPINLOCK(led_lock);
127 static DEFINE_SPINLOCK(func_buf_lock); /* guard 'func_buf' and friends */
128 static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)]; /* keyboard key bitmap */
129 static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */
130 static bool dead_key_next;
132 /* Handles a number being assembled on the number pad */
133 static bool npadch_active;
134 static unsigned int npadch_value;
136 static unsigned int diacr;
137 static char rep; /* flag telling character repeat */
139 static int shift_state = 0;
141 static unsigned int ledstate = -1U; /* undefined */
142 static unsigned char ledioctl;
145 * Notifier list for console keyboard events
147 static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);
149 int register_keyboard_notifier(struct notifier_block *nb)
151 return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
153 EXPORT_SYMBOL_GPL(register_keyboard_notifier);
155 int unregister_keyboard_notifier(struct notifier_block *nb)
157 return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
159 EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);
162 * Translation of scancodes to keycodes. We set them on only the first
163 * keyboard in the list that accepts the scancode and keycode.
164 * Explanation for not choosing the first attached keyboard anymore:
165 * USB keyboards for example have two event devices: one for all "normal"
166 * keys and one for extra function keys (like "volume up", "make coffee",
167 * etc.). So this means that scancodes for the extra function keys won't
168 * be valid for the first event device, but will be for the second.
171 struct getset_keycode_data {
172 struct input_keymap_entry ke;
176 static int getkeycode_helper(struct input_handle *handle, void *data)
178 struct getset_keycode_data *d = data;
180 d->error = input_get_keycode(handle->dev, &d->ke);
182 return d->error == 0; /* stop as soon as we successfully get one */
185 static int getkeycode(unsigned int scancode)
187 struct getset_keycode_data d = {
190 .len = sizeof(scancode),
196 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
198 input_handler_for_each_handle(&kbd_handler, &d, getkeycode_helper);
200 return d.error ?: d.ke.keycode;
203 static int setkeycode_helper(struct input_handle *handle, void *data)
205 struct getset_keycode_data *d = data;
207 d->error = input_set_keycode(handle->dev, &d->ke);
209 return d->error == 0; /* stop as soon as we successfully set one */
212 static int setkeycode(unsigned int scancode, unsigned int keycode)
214 struct getset_keycode_data d = {
217 .len = sizeof(scancode),
223 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
225 input_handler_for_each_handle(&kbd_handler, &d, setkeycode_helper);
231 * Making beeps and bells. Note that we prefer beeps to bells, but when
232 * shutting the sound off we do both.
235 static int kd_sound_helper(struct input_handle *handle, void *data)
237 unsigned int *hz = data;
238 struct input_dev *dev = handle->dev;
240 if (test_bit(EV_SND, dev->evbit)) {
241 if (test_bit(SND_TONE, dev->sndbit)) {
242 input_inject_event(handle, EV_SND, SND_TONE, *hz);
246 if (test_bit(SND_BELL, dev->sndbit))
247 input_inject_event(handle, EV_SND, SND_BELL, *hz ? 1 : 0);
253 static void kd_nosound(struct timer_list *unused)
255 static unsigned int zero;
257 input_handler_for_each_handle(&kbd_handler, &zero, kd_sound_helper);
260 static DEFINE_TIMER(kd_mksound_timer, kd_nosound);
262 void kd_mksound(unsigned int hz, unsigned int ticks)
264 del_timer_sync(&kd_mksound_timer);
266 input_handler_for_each_handle(&kbd_handler, &hz, kd_sound_helper);
269 mod_timer(&kd_mksound_timer, jiffies + ticks);
271 EXPORT_SYMBOL(kd_mksound);
274 * Setting the keyboard rate.
277 static int kbd_rate_helper(struct input_handle *handle, void *data)
279 struct input_dev *dev = handle->dev;
280 struct kbd_repeat *rpt = data;
282 if (test_bit(EV_REP, dev->evbit)) {
284 if (rpt[0].delay > 0)
285 input_inject_event(handle,
286 EV_REP, REP_DELAY, rpt[0].delay);
287 if (rpt[0].period > 0)
288 input_inject_event(handle,
289 EV_REP, REP_PERIOD, rpt[0].period);
291 rpt[1].delay = dev->rep[REP_DELAY];
292 rpt[1].period = dev->rep[REP_PERIOD];
298 int kbd_rate(struct kbd_repeat *rpt)
300 struct kbd_repeat data[2] = { *rpt };
302 input_handler_for_each_handle(&kbd_handler, data, kbd_rate_helper);
303 *rpt = data[1]; /* Copy currently used settings */
311 static void put_queue(struct vc_data *vc, int ch)
313 tty_insert_flip_char(&vc->port, ch, 0);
314 tty_schedule_flip(&vc->port);
317 static void puts_queue(struct vc_data *vc, char *cp)
320 tty_insert_flip_char(&vc->port, *cp, 0);
323 tty_schedule_flip(&vc->port);
326 static void applkey(struct vc_data *vc, int key, char mode)
328 static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
330 buf[1] = (mode ? 'O' : '[');
336 * Many other routines do put_queue, but I think either
337 * they produce ASCII, or they produce some user-assigned
338 * string, and in both cases we might assume that it is
341 static void to_utf8(struct vc_data *vc, uint c)
346 else if (c < 0x800) {
347 /* 110***** 10****** */
348 put_queue(vc, 0xc0 | (c >> 6));
349 put_queue(vc, 0x80 | (c & 0x3f));
350 } else if (c < 0x10000) {
351 if (c >= 0xD800 && c < 0xE000)
355 /* 1110**** 10****** 10****** */
356 put_queue(vc, 0xe0 | (c >> 12));
357 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
358 put_queue(vc, 0x80 | (c & 0x3f));
359 } else if (c < 0x110000) {
360 /* 11110*** 10****** 10****** 10****** */
361 put_queue(vc, 0xf0 | (c >> 18));
362 put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
363 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
364 put_queue(vc, 0x80 | (c & 0x3f));
369 * Called after returning from RAW mode or when changing consoles - recompute
370 * shift_down[] and shift_state from key_down[] maybe called when keymap is
371 * undefined, so that shiftkey release is seen. The caller must hold the
375 static void do_compute_shiftstate(void)
377 unsigned int k, sym, val;
380 memset(shift_down, 0, sizeof(shift_down));
382 for_each_set_bit(k, key_down, min(NR_KEYS, KEY_CNT)) {
383 sym = U(key_maps[0][k]);
384 if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
388 if (val == KVAL(K_CAPSSHIFT))
392 shift_state |= BIT(val);
396 /* We still have to export this method to vt.c */
397 void compute_shiftstate(void)
400 spin_lock_irqsave(&kbd_event_lock, flags);
401 do_compute_shiftstate();
402 spin_unlock_irqrestore(&kbd_event_lock, flags);
406 * We have a combining character DIACR here, followed by the character CH.
407 * If the combination occurs in the table, return the corresponding value.
408 * Otherwise, if CH is a space or equals DIACR, return DIACR.
409 * Otherwise, conclude that DIACR was not combining after all,
410 * queue it and return CH.
412 static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
414 unsigned int d = diacr;
419 if ((d & ~0xff) == BRL_UC_ROW) {
420 if ((ch & ~0xff) == BRL_UC_ROW)
423 for (i = 0; i < accent_table_size; i++)
424 if (accent_table[i].diacr == d && accent_table[i].base == ch)
425 return accent_table[i].result;
428 if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
431 if (kbd->kbdmode == VC_UNICODE)
434 int c = conv_uni_to_8bit(d);
443 * Special function handlers
445 static void fn_enter(struct vc_data *vc)
448 if (kbd->kbdmode == VC_UNICODE)
451 int c = conv_uni_to_8bit(diacr);
459 if (vc_kbd_mode(kbd, VC_CRLF))
463 static void fn_caps_toggle(struct vc_data *vc)
468 chg_vc_kbd_led(kbd, VC_CAPSLOCK);
471 static void fn_caps_on(struct vc_data *vc)
476 set_vc_kbd_led(kbd, VC_CAPSLOCK);
479 static void fn_show_ptregs(struct vc_data *vc)
481 struct pt_regs *regs = get_irq_regs();
487 static void fn_hold(struct vc_data *vc)
489 struct tty_struct *tty = vc->port.tty;
495 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
496 * these routines are also activated by ^S/^Q.
497 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
505 static void fn_num(struct vc_data *vc)
507 if (vc_kbd_mode(kbd, VC_APPLIC))
514 * Bind this to Shift-NumLock if you work in application keypad mode
515 * but want to be able to change the NumLock flag.
516 * Bind this to NumLock if you prefer that the NumLock key always
517 * changes the NumLock flag.
519 static void fn_bare_num(struct vc_data *vc)
522 chg_vc_kbd_led(kbd, VC_NUMLOCK);
525 static void fn_lastcons(struct vc_data *vc)
527 /* switch to the last used console, ChN */
528 set_console(last_console);
531 static void fn_dec_console(struct vc_data *vc)
533 int i, cur = fg_console;
535 /* Currently switching? Queue this next switch relative to that. */
536 if (want_console != -1)
539 for (i = cur - 1; i != cur; i--) {
541 i = MAX_NR_CONSOLES - 1;
542 if (vc_cons_allocated(i))
548 static void fn_inc_console(struct vc_data *vc)
550 int i, cur = fg_console;
552 /* Currently switching? Queue this next switch relative to that. */
553 if (want_console != -1)
556 for (i = cur+1; i != cur; i++) {
557 if (i == MAX_NR_CONSOLES)
559 if (vc_cons_allocated(i))
565 static void fn_send_intr(struct vc_data *vc)
567 tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
568 tty_schedule_flip(&vc->port);
571 static void fn_scroll_forw(struct vc_data *vc)
576 static void fn_scroll_back(struct vc_data *vc)
581 static void fn_show_mem(struct vc_data *vc)
586 static void fn_show_state(struct vc_data *vc)
591 static void fn_boot_it(struct vc_data *vc)
596 static void fn_compose(struct vc_data *vc)
598 dead_key_next = true;
601 static void fn_spawn_con(struct vc_data *vc)
603 spin_lock(&vt_spawn_con.lock);
604 if (vt_spawn_con.pid)
605 if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) {
606 put_pid(vt_spawn_con.pid);
607 vt_spawn_con.pid = NULL;
609 spin_unlock(&vt_spawn_con.lock);
612 static void fn_SAK(struct vc_data *vc)
614 struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
615 schedule_work(SAK_work);
618 static void fn_null(struct vc_data *vc)
620 do_compute_shiftstate();
624 * Special key handlers
626 static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
630 static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
634 if (value >= ARRAY_SIZE(fn_handler))
636 if ((kbd->kbdmode == VC_RAW ||
637 kbd->kbdmode == VC_MEDIUMRAW ||
638 kbd->kbdmode == VC_OFF) &&
639 value != KVAL(K_SAK))
640 return; /* SAK is allowed even in raw mode */
641 fn_handler[value](vc);
644 static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
646 pr_err("k_lowercase was called - impossible\n");
649 static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
652 return; /* no action, if this is a key release */
655 value = handle_diacr(vc, value);
658 dead_key_next = false;
662 if (kbd->kbdmode == VC_UNICODE)
665 int c = conv_uni_to_8bit(value);
672 * Handle dead key. Note that we now may have several
673 * dead keys modifying the same character. Very useful
676 static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
681 diacr = (diacr ? handle_diacr(vc, value) : value);
684 static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
686 k_unicode(vc, conv_8bit_to_uni(value), up_flag);
689 static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
691 k_deadunicode(vc, value, up_flag);
695 * Obsolete - for backwards compatibility only
697 static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
699 static const unsigned char ret_diacr[NR_DEAD] = {
700 '`', /* dead_grave */
701 '\'', /* dead_acute */
702 '^', /* dead_circumflex */
703 '~', /* dead_tilda */
704 '"', /* dead_diaeresis */
705 ',', /* dead_cedilla */
706 '_', /* dead_macron */
707 'U', /* dead_breve */
708 '.', /* dead_abovedot */
709 '*', /* dead_abovering */
710 '=', /* dead_doubleacute */
711 'c', /* dead_caron */
712 'k', /* dead_ogonek */
714 '#', /* dead_voiced_sound */
715 'o', /* dead_semivoiced_sound */
716 '!', /* dead_belowdot */
719 '-', /* dead_stroke */
720 ')', /* dead_abovecomma */
721 '(', /* dead_abovereversedcomma */
722 ':', /* dead_doublegrave */
723 'n', /* dead_invertedbreve */
724 ';', /* dead_belowcomma */
725 '$', /* dead_currency */
726 '@', /* dead_greek */
729 k_deadunicode(vc, ret_diacr[value], up_flag);
732 static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
740 static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
745 if ((unsigned)value < ARRAY_SIZE(func_table)) {
746 if (func_table[value])
747 puts_queue(vc, func_table[value]);
749 pr_err("k_fn called with value=%d\n", value);
752 static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
754 static const char cur_chars[] = "BDCA";
759 applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
762 static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
764 static const char pad_chars[] = "0123456789+-*/\015,.?()#";
765 static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
768 return; /* no action, if this is a key release */
770 /* kludge... shift forces cursor/number keys */
771 if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
772 applkey(vc, app_map[value], 1);
776 if (!vc_kbd_led(kbd, VC_NUMLOCK)) {
781 k_fn(vc, KVAL(K_REMOVE), 0);
784 k_fn(vc, KVAL(K_INSERT), 0);
787 k_fn(vc, KVAL(K_SELECT), 0);
790 k_cur(vc, KVAL(K_DOWN), 0);
793 k_fn(vc, KVAL(K_PGDN), 0);
796 k_cur(vc, KVAL(K_LEFT), 0);
799 k_cur(vc, KVAL(K_RIGHT), 0);
802 k_fn(vc, KVAL(K_FIND), 0);
805 k_cur(vc, KVAL(K_UP), 0);
808 k_fn(vc, KVAL(K_PGUP), 0);
811 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
816 put_queue(vc, pad_chars[value]);
817 if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
821 static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
823 int old_state = shift_state;
829 * a CapsShift key acts like Shift but undoes CapsLock
831 if (value == KVAL(K_CAPSSHIFT)) {
832 value = KVAL(K_SHIFT);
834 clr_vc_kbd_led(kbd, VC_CAPSLOCK);
839 * handle the case that two shift or control
840 * keys are depressed simultaneously
842 if (shift_down[value])
847 if (shift_down[value])
848 shift_state |= (1 << value);
850 shift_state &= ~(1 << value);
853 if (up_flag && shift_state != old_state && npadch_active) {
854 if (kbd->kbdmode == VC_UNICODE)
855 to_utf8(vc, npadch_value);
857 put_queue(vc, npadch_value & 0xff);
858 npadch_active = false;
862 static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
867 if (vc_kbd_mode(kbd, VC_META)) {
868 put_queue(vc, '\033');
869 put_queue(vc, value);
871 put_queue(vc, value | 0x80);
874 static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
882 /* decimal input of code, while Alt depressed */
885 /* hexadecimal input of code, while AltGr depressed */
890 if (!npadch_active) {
892 npadch_active = true;
895 npadch_value = npadch_value * base + value;
898 static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
903 chg_vc_kbd_lock(kbd, value);
906 static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
908 k_shift(vc, value, up_flag);
912 chg_vc_kbd_slock(kbd, value);
913 /* try to make Alt, oops, AltGr and such work */
914 if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
916 chg_vc_kbd_slock(kbd, value);
920 /* by default, 300ms interval for combination release */
921 static unsigned brl_timeout = 300;
922 MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
923 module_param(brl_timeout, uint, 0644);
925 static unsigned brl_nbchords = 1;
926 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
927 module_param(brl_nbchords, uint, 0644);
929 static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
931 static unsigned long chords;
932 static unsigned committed;
935 k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
937 committed |= pattern;
939 if (chords == brl_nbchords) {
940 k_unicode(vc, BRL_UC_ROW | committed, up_flag);
947 static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
949 static unsigned pressed, committing;
950 static unsigned long releasestart;
952 if (kbd->kbdmode != VC_UNICODE) {
954 pr_warn("keyboard mode must be unicode for braille patterns\n");
959 k_unicode(vc, BRL_UC_ROW, up_flag);
967 pressed |= 1 << (value - 1);
969 committing = pressed;
970 } else if (brl_timeout) {
973 releasestart + msecs_to_jiffies(brl_timeout))) {
974 committing = pressed;
975 releasestart = jiffies;
977 pressed &= ~(1 << (value - 1));
978 if (!pressed && committing) {
979 k_brlcommit(vc, committing, 0);
984 k_brlcommit(vc, committing, 0);
987 pressed &= ~(1 << (value - 1));
991 #if IS_ENABLED(CONFIG_INPUT_LEDS) && IS_ENABLED(CONFIG_LEDS_TRIGGERS)
993 struct kbd_led_trigger {
994 struct led_trigger trigger;
998 static int kbd_led_trigger_activate(struct led_classdev *cdev)
1000 struct kbd_led_trigger *trigger =
1001 container_of(cdev->trigger, struct kbd_led_trigger, trigger);
1003 tasklet_disable(&keyboard_tasklet);
1004 if (ledstate != -1U)
1005 led_trigger_event(&trigger->trigger,
1006 ledstate & trigger->mask ?
1007 LED_FULL : LED_OFF);
1008 tasklet_enable(&keyboard_tasklet);
1013 #define KBD_LED_TRIGGER(_led_bit, _name) { \
1016 .activate = kbd_led_trigger_activate, \
1018 .mask = BIT(_led_bit), \
1021 #define KBD_LOCKSTATE_TRIGGER(_led_bit, _name) \
1022 KBD_LED_TRIGGER((_led_bit) + 8, _name)
1024 static struct kbd_led_trigger kbd_led_triggers[] = {
1025 KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
1026 KBD_LED_TRIGGER(VC_NUMLOCK, "kbd-numlock"),
1027 KBD_LED_TRIGGER(VC_CAPSLOCK, "kbd-capslock"),
1028 KBD_LED_TRIGGER(VC_KANALOCK, "kbd-kanalock"),
1030 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK, "kbd-shiftlock"),
1031 KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK, "kbd-altgrlock"),
1032 KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK, "kbd-ctrllock"),
1033 KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK, "kbd-altlock"),
1034 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
1035 KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
1036 KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK, "kbd-ctrlllock"),
1037 KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK, "kbd-ctrlrlock"),
1040 static void kbd_propagate_led_state(unsigned int old_state,
1041 unsigned int new_state)
1043 struct kbd_led_trigger *trigger;
1044 unsigned int changed = old_state ^ new_state;
1047 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1048 trigger = &kbd_led_triggers[i];
1050 if (changed & trigger->mask)
1051 led_trigger_event(&trigger->trigger,
1052 new_state & trigger->mask ?
1053 LED_FULL : LED_OFF);
1057 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1059 unsigned int led_state = *(unsigned int *)data;
1061 if (test_bit(EV_LED, handle->dev->evbit))
1062 kbd_propagate_led_state(~led_state, led_state);
1067 static void kbd_init_leds(void)
1072 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1073 error = led_trigger_register(&kbd_led_triggers[i].trigger);
1075 pr_err("error %d while registering trigger %s\n",
1076 error, kbd_led_triggers[i].trigger.name);
1082 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1084 unsigned int leds = *(unsigned int *)data;
1086 if (test_bit(EV_LED, handle->dev->evbit)) {
1087 input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
1088 input_inject_event(handle, EV_LED, LED_NUML, !!(leds & 0x02));
1089 input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & 0x04));
1090 input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
1096 static void kbd_propagate_led_state(unsigned int old_state,
1097 unsigned int new_state)
1099 input_handler_for_each_handle(&kbd_handler, &new_state,
1100 kbd_update_leds_helper);
1103 static void kbd_init_leds(void)
1110 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
1111 * or (ii) whatever pattern of lights people want to show using KDSETLED,
1112 * or (iii) specified bits of specified words in kernel memory.
1114 static unsigned char getledstate(void)
1116 return ledstate & 0xff;
1119 void setledstate(struct kbd_struct *kb, unsigned int led)
1121 unsigned long flags;
1122 spin_lock_irqsave(&led_lock, flags);
1125 kb->ledmode = LED_SHOW_IOCTL;
1127 kb->ledmode = LED_SHOW_FLAGS;
1130 spin_unlock_irqrestore(&led_lock, flags);
1133 static inline unsigned char getleds(void)
1135 struct kbd_struct *kb = kbd_table + fg_console;
1137 if (kb->ledmode == LED_SHOW_IOCTL)
1140 return kb->ledflagstate;
1144 * vt_get_leds - helper for braille console
1145 * @console: console to read
1146 * @flag: flag we want to check
1148 * Check the status of a keyboard led flag and report it back
1150 int vt_get_leds(int console, int flag)
1152 struct kbd_struct *kb = kbd_table + console;
1154 unsigned long flags;
1156 spin_lock_irqsave(&led_lock, flags);
1157 ret = vc_kbd_led(kb, flag);
1158 spin_unlock_irqrestore(&led_lock, flags);
1162 EXPORT_SYMBOL_GPL(vt_get_leds);
1165 * vt_set_led_state - set LED state of a console
1166 * @console: console to set
1169 * Set the LEDs on a console. This is a wrapper for the VT layer
1170 * so that we can keep kbd knowledge internal
1172 void vt_set_led_state(int console, int leds)
1174 struct kbd_struct *kb = kbd_table + console;
1175 setledstate(kb, leds);
1179 * vt_kbd_con_start - Keyboard side of console start
1182 * Handle console start. This is a wrapper for the VT layer
1183 * so that we can keep kbd knowledge internal
1185 * FIXME: We eventually need to hold the kbd lock here to protect
1186 * the LED updating. We can't do it yet because fn_hold calls stop_tty
1187 * and start_tty under the kbd_event_lock, while normal tty paths
1188 * don't hold the lock. We probably need to split out an LED lock
1189 * but not during an -rc release!
1191 void vt_kbd_con_start(int console)
1193 struct kbd_struct *kb = kbd_table + console;
1194 unsigned long flags;
1195 spin_lock_irqsave(&led_lock, flags);
1196 clr_vc_kbd_led(kb, VC_SCROLLOCK);
1198 spin_unlock_irqrestore(&led_lock, flags);
1202 * vt_kbd_con_stop - Keyboard side of console stop
1205 * Handle console stop. This is a wrapper for the VT layer
1206 * so that we can keep kbd knowledge internal
1208 void vt_kbd_con_stop(int console)
1210 struct kbd_struct *kb = kbd_table + console;
1211 unsigned long flags;
1212 spin_lock_irqsave(&led_lock, flags);
1213 set_vc_kbd_led(kb, VC_SCROLLOCK);
1215 spin_unlock_irqrestore(&led_lock, flags);
1219 * This is the tasklet that updates LED state of LEDs using standard
1220 * keyboard triggers. The reason we use tasklet is that we need to
1221 * handle the scenario when keyboard handler is not registered yet
1222 * but we already getting updates from the VT to update led state.
1224 static void kbd_bh(unsigned long dummy)
1227 unsigned long flags;
1229 spin_lock_irqsave(&led_lock, flags);
1231 leds |= (unsigned int)kbd->lockstate << 8;
1232 spin_unlock_irqrestore(&led_lock, flags);
1234 if (leds != ledstate) {
1235 kbd_propagate_led_state(ledstate, leds);
1240 DECLARE_TASKLET_DISABLED_OLD(keyboard_tasklet, kbd_bh);
1242 #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
1243 defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
1244 defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
1245 (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
1247 #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
1248 ((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
1250 static const unsigned short x86_keycodes[256] =
1251 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
1252 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
1253 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
1254 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
1255 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
1256 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
1257 284,285,309, 0,312, 91,327,328,329,331,333,335,336,337,338,339,
1258 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
1259 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
1260 103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
1261 291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
1262 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
1263 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
1264 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
1265 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
1268 static int sparc_l1_a_state;
1269 extern void sun_do_break(void);
1272 static int emulate_raw(struct vc_data *vc, unsigned int keycode,
1273 unsigned char up_flag)
1280 put_queue(vc, 0xe1);
1281 put_queue(vc, 0x1d | up_flag);
1282 put_queue(vc, 0x45 | up_flag);
1287 put_queue(vc, 0xf2);
1292 put_queue(vc, 0xf1);
1297 * Real AT keyboards (that's what we're trying
1298 * to emulate here) emit 0xe0 0x2a 0xe0 0x37 when
1299 * pressing PrtSc/SysRq alone, but simply 0x54
1300 * when pressing Alt+PrtSc/SysRq.
1302 if (test_bit(KEY_LEFTALT, key_down) ||
1303 test_bit(KEY_RIGHTALT, key_down)) {
1304 put_queue(vc, 0x54 | up_flag);
1306 put_queue(vc, 0xe0);
1307 put_queue(vc, 0x2a | up_flag);
1308 put_queue(vc, 0xe0);
1309 put_queue(vc, 0x37 | up_flag);
1317 code = x86_keycodes[keycode];
1322 put_queue(vc, 0xe0);
1323 put_queue(vc, (code & 0x7f) | up_flag);
1333 #define HW_RAW(dev) 0
1335 static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
1340 put_queue(vc, keycode | up_flag);
1345 static void kbd_rawcode(unsigned char data)
1347 struct vc_data *vc = vc_cons[fg_console].d;
1349 kbd = kbd_table + vc->vc_num;
1350 if (kbd->kbdmode == VC_RAW)
1351 put_queue(vc, data);
1354 static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
1356 struct vc_data *vc = vc_cons[fg_console].d;
1357 unsigned short keysym, *key_map;
1360 struct tty_struct *tty;
1362 struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
1367 if (tty && (!tty->driver_data)) {
1368 /* No driver data? Strange. Okay we fix it then. */
1369 tty->driver_data = vc;
1372 kbd = kbd_table + vc->vc_num;
1375 if (keycode == KEY_STOP)
1376 sparc_l1_a_state = down;
1381 raw_mode = (kbd->kbdmode == VC_RAW);
1382 if (raw_mode && !hw_raw)
1383 if (emulate_raw(vc, keycode, !down << 7))
1384 if (keycode < BTN_MISC && printk_ratelimit())
1385 pr_warn("can't emulate rawmode for keycode %d\n",
1389 if (keycode == KEY_A && sparc_l1_a_state) {
1390 sparc_l1_a_state = false;
1395 if (kbd->kbdmode == VC_MEDIUMRAW) {
1397 * This is extended medium raw mode, with keys above 127
1398 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
1399 * the 'up' flag if needed. 0 is reserved, so this shouldn't
1400 * interfere with anything else. The two bytes after 0 will
1401 * always have the up flag set not to interfere with older
1402 * applications. This allows for 16384 different keycodes,
1403 * which should be enough.
1405 if (keycode < 128) {
1406 put_queue(vc, keycode | (!down << 7));
1408 put_queue(vc, !down << 7);
1409 put_queue(vc, (keycode >> 7) | 0x80);
1410 put_queue(vc, keycode | 0x80);
1416 set_bit(keycode, key_down);
1418 clear_bit(keycode, key_down);
1421 (!vc_kbd_mode(kbd, VC_REPEAT) ||
1422 (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
1424 * Don't repeat a key if the input buffers are not empty and the
1425 * characters get aren't echoed locally. This makes key repeat
1426 * usable with slow applications and under heavy loads.
1431 param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
1432 param.ledstate = kbd->ledflagstate;
1433 key_map = key_maps[shift_final];
1435 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1436 KBD_KEYCODE, ¶m);
1437 if (rc == NOTIFY_STOP || !key_map) {
1438 atomic_notifier_call_chain(&keyboard_notifier_list,
1439 KBD_UNBOUND_KEYCODE, ¶m);
1440 do_compute_shiftstate();
1441 kbd->slockstate = 0;
1445 if (keycode < NR_KEYS)
1446 keysym = key_map[keycode];
1447 else if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
1448 keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
1452 type = KTYP(keysym);
1455 param.value = keysym;
1456 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1457 KBD_UNICODE, ¶m);
1458 if (rc != NOTIFY_STOP)
1459 if (down && !raw_mode)
1460 k_unicode(vc, keysym, !down);
1466 if (type == KT_LETTER) {
1468 if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
1469 key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
1471 keysym = key_map[keycode];
1475 param.value = keysym;
1476 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1477 KBD_KEYSYM, ¶m);
1478 if (rc == NOTIFY_STOP)
1481 if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)
1484 (*k_handler[type])(vc, keysym & 0xff, !down);
1486 param.ledstate = kbd->ledflagstate;
1487 atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, ¶m);
1489 if (type != KT_SLOCK)
1490 kbd->slockstate = 0;
1493 static void kbd_event(struct input_handle *handle, unsigned int event_type,
1494 unsigned int event_code, int value)
1496 /* We are called with interrupts disabled, just take the lock */
1497 spin_lock(&kbd_event_lock);
1499 if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
1501 if (event_type == EV_KEY && event_code <= KEY_MAX)
1502 kbd_keycode(event_code, value, HW_RAW(handle->dev));
1504 spin_unlock(&kbd_event_lock);
1506 tasklet_schedule(&keyboard_tasklet);
1507 do_poke_blanked_console = 1;
1508 schedule_console_callback();
1511 static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
1515 if (test_bit(EV_SND, dev->evbit))
1518 if (test_bit(EV_KEY, dev->evbit)) {
1519 for (i = KEY_RESERVED; i < BTN_MISC; i++)
1520 if (test_bit(i, dev->keybit))
1522 for (i = KEY_BRL_DOT1; i <= KEY_BRL_DOT10; i++)
1523 if (test_bit(i, dev->keybit))
1531 * When a keyboard (or other input device) is found, the kbd_connect
1532 * function is called. The function then looks at the device, and if it
1533 * likes it, it can open it and get events from it. In this (kbd_connect)
1534 * function, we should decide which VT to bind that keyboard to initially.
1536 static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
1537 const struct input_device_id *id)
1539 struct input_handle *handle;
1542 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
1547 handle->handler = handler;
1548 handle->name = "kbd";
1550 error = input_register_handle(handle);
1552 goto err_free_handle;
1554 error = input_open_device(handle);
1556 goto err_unregister_handle;
1560 err_unregister_handle:
1561 input_unregister_handle(handle);
1567 static void kbd_disconnect(struct input_handle *handle)
1569 input_close_device(handle);
1570 input_unregister_handle(handle);
1575 * Start keyboard handler on the new keyboard by refreshing LED state to
1576 * match the rest of the system.
1578 static void kbd_start(struct input_handle *handle)
1580 tasklet_disable(&keyboard_tasklet);
1582 if (ledstate != -1U)
1583 kbd_update_leds_helper(handle, &ledstate);
1585 tasklet_enable(&keyboard_tasklet);
1588 static const struct input_device_id kbd_ids[] = {
1590 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1591 .evbit = { BIT_MASK(EV_KEY) },
1595 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1596 .evbit = { BIT_MASK(EV_SND) },
1599 { }, /* Terminating entry */
1602 MODULE_DEVICE_TABLE(input, kbd_ids);
1604 static struct input_handler kbd_handler = {
1607 .connect = kbd_connect,
1608 .disconnect = kbd_disconnect,
1611 .id_table = kbd_ids,
1614 int __init kbd_init(void)
1619 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1620 kbd_table[i].ledflagstate = kbd_defleds();
1621 kbd_table[i].default_ledflagstate = kbd_defleds();
1622 kbd_table[i].ledmode = LED_SHOW_FLAGS;
1623 kbd_table[i].lockstate = KBD_DEFLOCK;
1624 kbd_table[i].slockstate = 0;
1625 kbd_table[i].modeflags = KBD_DEFMODE;
1626 kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
1631 error = input_register_handler(&kbd_handler);
1635 tasklet_enable(&keyboard_tasklet);
1636 tasklet_schedule(&keyboard_tasklet);
1641 /* Ioctl support code */
1644 * vt_do_diacrit - diacritical table updates
1645 * @cmd: ioctl request
1646 * @udp: pointer to user data for ioctl
1647 * @perm: permissions check computed by caller
1649 * Update the diacritical tables atomically and safely. Lock them
1650 * against simultaneous keypresses
1652 int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm)
1654 unsigned long flags;
1661 struct kbdiacrs __user *a = udp;
1662 struct kbdiacr *dia;
1665 dia = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacr),
1670 /* Lock the diacriticals table, make a copy and then
1671 copy it after we unlock */
1672 spin_lock_irqsave(&kbd_event_lock, flags);
1674 asize = accent_table_size;
1675 for (i = 0; i < asize; i++) {
1676 dia[i].diacr = conv_uni_to_8bit(
1677 accent_table[i].diacr);
1678 dia[i].base = conv_uni_to_8bit(
1679 accent_table[i].base);
1680 dia[i].result = conv_uni_to_8bit(
1681 accent_table[i].result);
1683 spin_unlock_irqrestore(&kbd_event_lock, flags);
1685 if (put_user(asize, &a->kb_cnt))
1687 else if (copy_to_user(a->kbdiacr, dia,
1688 asize * sizeof(struct kbdiacr)))
1695 struct kbdiacrsuc __user *a = udp;
1698 buf = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacruc),
1703 /* Lock the diacriticals table, make a copy and then
1704 copy it after we unlock */
1705 spin_lock_irqsave(&kbd_event_lock, flags);
1707 asize = accent_table_size;
1708 memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc));
1710 spin_unlock_irqrestore(&kbd_event_lock, flags);
1712 if (put_user(asize, &a->kb_cnt))
1714 else if (copy_to_user(a->kbdiacruc, buf,
1715 asize*sizeof(struct kbdiacruc)))
1723 struct kbdiacrs __user *a = udp;
1724 struct kbdiacr *dia = NULL;
1730 if (get_user(ct, &a->kb_cnt))
1732 if (ct >= MAX_DIACR)
1737 dia = memdup_user(a->kbdiacr,
1738 sizeof(struct kbdiacr) * ct);
1740 return PTR_ERR(dia);
1744 spin_lock_irqsave(&kbd_event_lock, flags);
1745 accent_table_size = ct;
1746 for (i = 0; i < ct; i++) {
1747 accent_table[i].diacr =
1748 conv_8bit_to_uni(dia[i].diacr);
1749 accent_table[i].base =
1750 conv_8bit_to_uni(dia[i].base);
1751 accent_table[i].result =
1752 conv_8bit_to_uni(dia[i].result);
1754 spin_unlock_irqrestore(&kbd_event_lock, flags);
1761 struct kbdiacrsuc __user *a = udp;
1768 if (get_user(ct, &a->kb_cnt))
1771 if (ct >= MAX_DIACR)
1775 buf = memdup_user(a->kbdiacruc,
1776 ct * sizeof(struct kbdiacruc));
1778 return PTR_ERR(buf);
1780 spin_lock_irqsave(&kbd_event_lock, flags);
1782 memcpy(accent_table, buf,
1783 ct * sizeof(struct kbdiacruc));
1784 accent_table_size = ct;
1785 spin_unlock_irqrestore(&kbd_event_lock, flags);
1794 * vt_do_kdskbmode - set keyboard mode ioctl
1795 * @console: the console to use
1796 * @arg: the requested mode
1798 * Update the keyboard mode bits while holding the correct locks.
1799 * Return 0 for success or an error code.
1801 int vt_do_kdskbmode(int console, unsigned int arg)
1803 struct kbd_struct *kb = kbd_table + console;
1805 unsigned long flags;
1807 spin_lock_irqsave(&kbd_event_lock, flags);
1810 kb->kbdmode = VC_RAW;
1813 kb->kbdmode = VC_MEDIUMRAW;
1816 kb->kbdmode = VC_XLATE;
1817 do_compute_shiftstate();
1820 kb->kbdmode = VC_UNICODE;
1821 do_compute_shiftstate();
1824 kb->kbdmode = VC_OFF;
1829 spin_unlock_irqrestore(&kbd_event_lock, flags);
1834 * vt_do_kdskbmeta - set keyboard meta state
1835 * @console: the console to use
1836 * @arg: the requested meta state
1838 * Update the keyboard meta bits while holding the correct locks.
1839 * Return 0 for success or an error code.
1841 int vt_do_kdskbmeta(int console, unsigned int arg)
1843 struct kbd_struct *kb = kbd_table + console;
1845 unsigned long flags;
1847 spin_lock_irqsave(&kbd_event_lock, flags);
1850 clr_vc_kbd_mode(kb, VC_META);
1853 set_vc_kbd_mode(kb, VC_META);
1858 spin_unlock_irqrestore(&kbd_event_lock, flags);
1862 int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
1865 struct kbkeycode tmp;
1868 if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
1872 kc = getkeycode(tmp.scancode);
1874 kc = put_user(kc, &user_kbkc->keycode);
1879 kc = setkeycode(tmp.scancode, tmp.keycode);
1885 #define i (tmp.kb_index)
1886 #define s (tmp.kb_table)
1887 #define v (tmp.kb_value)
1889 int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
1892 struct kbd_struct *kb = kbd_table + console;
1894 ushort *key_map, *new_map, val, ov;
1895 unsigned long flags;
1897 if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
1900 if (!capable(CAP_SYS_TTY_CONFIG))
1905 /* Ensure another thread doesn't free it under us */
1906 spin_lock_irqsave(&kbd_event_lock, flags);
1907 key_map = key_maps[s];
1909 val = U(key_map[i]);
1910 if (kb->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
1913 val = (i ? K_HOLE : K_NOSUCHMAP);
1914 spin_unlock_irqrestore(&kbd_event_lock, flags);
1915 return put_user(val, &user_kbe->kb_value);
1919 if (!i && v == K_NOSUCHMAP) {
1920 spin_lock_irqsave(&kbd_event_lock, flags);
1921 /* deallocate map */
1922 key_map = key_maps[s];
1925 if (key_map[0] == U(K_ALLOCATED)) {
1930 spin_unlock_irqrestore(&kbd_event_lock, flags);
1934 if (KTYP(v) < NR_TYPES) {
1935 if (KVAL(v) > max_vals[KTYP(v)])
1938 if (kb->kbdmode != VC_UNICODE)
1941 /* ++Geert: non-PC keyboards may generate keycode zero */
1942 #if !defined(__mc68000__) && !defined(__powerpc__)
1943 /* assignment to entry 0 only tests validity of args */
1948 new_map = kmalloc(sizeof(plain_map), GFP_KERNEL);
1951 spin_lock_irqsave(&kbd_event_lock, flags);
1952 key_map = key_maps[s];
1953 if (key_map == NULL) {
1956 if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
1957 !capable(CAP_SYS_RESOURCE)) {
1958 spin_unlock_irqrestore(&kbd_event_lock, flags);
1962 key_maps[s] = new_map;
1964 key_map[0] = U(K_ALLOCATED);
1965 for (j = 1; j < NR_KEYS; j++)
1966 key_map[j] = U(K_HOLE);
1977 if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) {
1978 spin_unlock_irqrestore(&kbd_event_lock, flags);
1982 if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
1983 do_compute_shiftstate();
1985 spin_unlock_irqrestore(&kbd_event_lock, flags);
1994 /* FIXME: This one needs untangling and locking */
1995 int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
1997 struct kbsentry *kbs;
2001 char *first_free, *fj, *fnw;
2004 unsigned long flags;
2006 if (!capable(CAP_SYS_TTY_CONFIG))
2009 kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
2015 /* we mostly copy too much here (512bytes), but who cares ;) */
2016 if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
2020 kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
2021 i = array_index_nospec(kbs->kb_func, MAX_NR_FUNC);
2025 /* size should have been a struct member */
2026 unsigned char *from = func_table[i] ? : "";
2028 ret = copy_to_user(user_kdgkb->kb_string, from,
2029 strlen(from) + 1) ? -EFAULT : 0;
2041 /* race aginst other writers */
2043 spin_lock_irqsave(&func_buf_lock, flags);
2046 /* fj pointer to next entry after 'q' */
2047 first_free = funcbufptr + (funcbufsize - funcbufleft);
2048 for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
2050 if (j < MAX_NR_FUNC)
2054 /* buffer usage increase by new entry */
2055 delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
2057 if (delta <= funcbufleft) { /* it fits in current buf */
2058 if (j < MAX_NR_FUNC) {
2059 /* make enough space for new entry at 'fj' */
2060 memmove(fj + delta, fj, first_free - fj);
2061 for (k = j; k < MAX_NR_FUNC; k++)
2063 func_table[k] += delta;
2067 funcbufleft -= delta;
2068 } else { /* allocate a larger buffer */
2070 while (sz < funcbufsize - funcbufleft + delta)
2073 spin_unlock_irqrestore(&func_buf_lock, flags);
2075 fnw = kmalloc(sz, GFP_KERNEL);
2086 /* copy data before insertion point to new location */
2087 if (fj > funcbufptr)
2088 memmove(fnw, funcbufptr, fj - funcbufptr);
2089 for (k = 0; k < j; k++)
2091 func_table[k] = fnw + (func_table[k] - funcbufptr);
2093 /* copy data after insertion point to new location */
2094 if (first_free > fj) {
2095 memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
2096 for (k = j; k < MAX_NR_FUNC; k++)
2098 func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
2100 if (funcbufptr != func_buf)
2103 funcbufleft = funcbufleft - delta + sz - funcbufsize;
2106 /* finally insert item itself */
2107 strcpy(func_table[i], kbs->kb_string);
2108 spin_unlock_irqrestore(&func_buf_lock, flags);
2117 int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
2119 struct kbd_struct *kb = kbd_table + console;
2120 unsigned long flags;
2121 unsigned char ucval;
2124 /* the ioctls below read/set the flags usually shown in the leds */
2125 /* don't use them - they will go away without warning */
2127 spin_lock_irqsave(&kbd_event_lock, flags);
2128 ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);
2129 spin_unlock_irqrestore(&kbd_event_lock, flags);
2130 return put_user(ucval, (char __user *)arg);
2137 spin_lock_irqsave(&led_lock, flags);
2138 kb->ledflagstate = (arg & 7);
2139 kb->default_ledflagstate = ((arg >> 4) & 7);
2141 spin_unlock_irqrestore(&led_lock, flags);
2144 /* the ioctls below only set the lights, not the functions */
2145 /* for those, see KDGKBLED and KDSKBLED above */
2147 ucval = getledstate();
2148 return put_user(ucval, (char __user *)arg);
2153 setledstate(kb, arg);
2156 return -ENOIOCTLCMD;
2159 int vt_do_kdgkbmode(int console)
2161 struct kbd_struct *kb = kbd_table + console;
2162 /* This is a spot read so needs no locking */
2163 switch (kb->kbdmode) {
2178 * vt_do_kdgkbmeta - report meta status
2179 * @console: console to report
2181 * Report the meta flag status of this console
2183 int vt_do_kdgkbmeta(int console)
2185 struct kbd_struct *kb = kbd_table + console;
2186 /* Again a spot read so no locking */
2187 return vc_kbd_mode(kb, VC_META) ? K_ESCPREFIX : K_METABIT;
2191 * vt_reset_unicode - reset the unicode status
2192 * @console: console being reset
2194 * Restore the unicode console state to its default
2196 void vt_reset_unicode(int console)
2198 unsigned long flags;
2200 spin_lock_irqsave(&kbd_event_lock, flags);
2201 kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
2202 spin_unlock_irqrestore(&kbd_event_lock, flags);
2206 * vt_get_shiftstate - shift bit state
2208 * Report the shift bits from the keyboard state. We have to export
2209 * this to support some oddities in the vt layer.
2211 int vt_get_shift_state(void)
2213 /* Don't lock as this is a transient report */
2218 * vt_reset_keyboard - reset keyboard state
2219 * @console: console to reset
2221 * Reset the keyboard bits for a console as part of a general console
2224 void vt_reset_keyboard(int console)
2226 struct kbd_struct *kb = kbd_table + console;
2227 unsigned long flags;
2229 spin_lock_irqsave(&kbd_event_lock, flags);
2230 set_vc_kbd_mode(kb, VC_REPEAT);
2231 clr_vc_kbd_mode(kb, VC_CKMODE);
2232 clr_vc_kbd_mode(kb, VC_APPLIC);
2233 clr_vc_kbd_mode(kb, VC_CRLF);
2236 spin_lock(&led_lock);
2237 kb->ledmode = LED_SHOW_FLAGS;
2238 kb->ledflagstate = kb->default_ledflagstate;
2239 spin_unlock(&led_lock);
2240 /* do not do set_leds here because this causes an endless tasklet loop
2241 when the keyboard hasn't been initialized yet */
2242 spin_unlock_irqrestore(&kbd_event_lock, flags);
2246 * vt_get_kbd_mode_bit - read keyboard status bits
2247 * @console: console to read from
2248 * @bit: mode bit to read
2250 * Report back a vt mode bit. We do this without locking so the
2251 * caller must be sure that there are no synchronization needs
2254 int vt_get_kbd_mode_bit(int console, int bit)
2256 struct kbd_struct *kb = kbd_table + console;
2257 return vc_kbd_mode(kb, bit);
2261 * vt_set_kbd_mode_bit - read keyboard status bits
2262 * @console: console to read from
2263 * @bit: mode bit to read
2265 * Set a vt mode bit. We do this without locking so the
2266 * caller must be sure that there are no synchronization needs
2269 void vt_set_kbd_mode_bit(int console, int bit)
2271 struct kbd_struct *kb = kbd_table + console;
2272 unsigned long flags;
2274 spin_lock_irqsave(&kbd_event_lock, flags);
2275 set_vc_kbd_mode(kb, bit);
2276 spin_unlock_irqrestore(&kbd_event_lock, flags);
2280 * vt_clr_kbd_mode_bit - read keyboard status bits
2281 * @console: console to read from
2282 * @bit: mode bit to read
2284 * Report back a vt mode bit. We do this without locking so the
2285 * caller must be sure that there are no synchronization needs
2288 void vt_clr_kbd_mode_bit(int console, int bit)
2290 struct kbd_struct *kb = kbd_table + console;
2291 unsigned long flags;
2293 spin_lock_irqsave(&kbd_event_lock, flags);
2294 clr_vc_kbd_mode(kb, bit);
2295 spin_unlock_irqrestore(&kbd_event_lock, flags);