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/init.h>
30 #include <linux/input.h>
31 #include <linux/jiffies.h>
32 #include <linux/kbd_diacr.h>
33 #include <linux/kbd_kern.h>
34 #include <linux/leds.h>
36 #include <linux/module.h>
37 #include <linux/nospec.h>
38 #include <linux/notifier.h>
39 #include <linux/reboot.h>
40 #include <linux/sched/debug.h>
41 #include <linux/sched/signal.h>
42 #include <linux/slab.h>
43 #include <linux/spinlock.h>
44 #include <linux/string.h>
45 #include <linux/tty_flip.h>
46 #include <linux/tty.h>
47 #include <linux/uaccess.h>
48 #include <linux/vt_kern.h>
50 #include <asm/irq_regs.h>
53 * Exported functions/variables
56 #define KBD_DEFMODE (BIT(VC_REPEAT) | BIT(VC_META))
58 #if defined(CONFIG_X86) || defined(CONFIG_PARISC)
59 #include <asm/kbdleds.h>
61 static inline int kbd_defleds(void)
74 k_self, k_fn, k_spec, k_pad,\
75 k_dead, k_cons, k_cur, k_shift,\
76 k_meta, k_ascii, k_lock, k_lowercase,\
77 k_slock, k_dead2, k_brl, k_ignore
79 typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
81 static k_handler_fn K_HANDLERS;
82 static k_handler_fn *k_handler[16] = { K_HANDLERS };
85 fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\
86 fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\
87 fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\
88 fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\
89 fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num
91 typedef void (fn_handler_fn)(struct vc_data *vc);
92 static fn_handler_fn FN_HANDLERS;
93 static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
96 * Variables exported for vt_ioctl.c
99 struct vt_spawn_console vt_spawn_con = {
100 .lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock),
110 static struct kbd_struct kbd_table[MAX_NR_CONSOLES];
111 static struct kbd_struct *kbd = kbd_table;
113 /* maximum values each key_handler can handle */
114 static const unsigned char max_vals[] = {
116 [ KT_FN ] = ARRAY_SIZE(func_table) - 1,
117 [ KT_SPEC ] = ARRAY_SIZE(fn_handler) - 1,
118 [ KT_PAD ] = NR_PAD - 1,
119 [ KT_DEAD ] = NR_DEAD - 1,
122 [ KT_SHIFT ] = NR_SHIFT - 1,
124 [ KT_ASCII ] = NR_ASCII - 1,
125 [ KT_LOCK ] = NR_LOCK - 1,
127 [ KT_SLOCK ] = NR_LOCK - 1,
129 [ KT_BRL ] = NR_BRL - 1,
132 static const int NR_TYPES = ARRAY_SIZE(max_vals);
134 static void kbd_bh(struct tasklet_struct *unused);
135 static DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh);
137 static struct input_handler kbd_handler;
138 static DEFINE_SPINLOCK(kbd_event_lock);
139 static DEFINE_SPINLOCK(led_lock);
140 static DEFINE_SPINLOCK(func_buf_lock); /* guard 'func_buf' and friends */
141 static DECLARE_BITMAP(key_down, KEY_CNT); /* keyboard key bitmap */
142 static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */
143 static bool dead_key_next;
145 /* Handles a number being assembled on the number pad */
146 static bool npadch_active;
147 static unsigned int npadch_value;
149 static unsigned int diacr;
150 static bool rep; /* flag telling character repeat */
152 static int shift_state = 0;
154 static unsigned int ledstate = -1U; /* undefined */
155 static unsigned char ledioctl;
158 * Notifier list for console keyboard events
160 static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);
162 int register_keyboard_notifier(struct notifier_block *nb)
164 return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
166 EXPORT_SYMBOL_GPL(register_keyboard_notifier);
168 int unregister_keyboard_notifier(struct notifier_block *nb)
170 return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
172 EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);
175 * Translation of scancodes to keycodes. We set them on only the first
176 * keyboard in the list that accepts the scancode and keycode.
177 * Explanation for not choosing the first attached keyboard anymore:
178 * USB keyboards for example have two event devices: one for all "normal"
179 * keys and one for extra function keys (like "volume up", "make coffee",
180 * etc.). So this means that scancodes for the extra function keys won't
181 * be valid for the first event device, but will be for the second.
184 struct getset_keycode_data {
185 struct input_keymap_entry ke;
189 static int getkeycode_helper(struct input_handle *handle, void *data)
191 struct getset_keycode_data *d = data;
193 d->error = input_get_keycode(handle->dev, &d->ke);
195 return d->error == 0; /* stop as soon as we successfully get one */
198 static int getkeycode(unsigned int scancode)
200 struct getset_keycode_data d = {
203 .len = sizeof(scancode),
209 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
211 input_handler_for_each_handle(&kbd_handler, &d, getkeycode_helper);
213 return d.error ?: d.ke.keycode;
216 static int setkeycode_helper(struct input_handle *handle, void *data)
218 struct getset_keycode_data *d = data;
220 d->error = input_set_keycode(handle->dev, &d->ke);
222 return d->error == 0; /* stop as soon as we successfully set one */
225 static int setkeycode(unsigned int scancode, unsigned int keycode)
227 struct getset_keycode_data d = {
230 .len = sizeof(scancode),
236 memcpy(d.ke.scancode, &scancode, sizeof(scancode));
238 input_handler_for_each_handle(&kbd_handler, &d, setkeycode_helper);
244 * Making beeps and bells. Note that we prefer beeps to bells, but when
245 * shutting the sound off we do both.
248 static int kd_sound_helper(struct input_handle *handle, void *data)
250 unsigned int *hz = data;
251 struct input_dev *dev = handle->dev;
253 if (test_bit(EV_SND, dev->evbit)) {
254 if (test_bit(SND_TONE, dev->sndbit)) {
255 input_inject_event(handle, EV_SND, SND_TONE, *hz);
259 if (test_bit(SND_BELL, dev->sndbit))
260 input_inject_event(handle, EV_SND, SND_BELL, *hz ? 1 : 0);
266 static void kd_nosound(struct timer_list *unused)
268 static unsigned int zero;
270 input_handler_for_each_handle(&kbd_handler, &zero, kd_sound_helper);
273 static DEFINE_TIMER(kd_mksound_timer, kd_nosound);
275 void kd_mksound(unsigned int hz, unsigned int ticks)
277 del_timer_sync(&kd_mksound_timer);
279 input_handler_for_each_handle(&kbd_handler, &hz, kd_sound_helper);
282 mod_timer(&kd_mksound_timer, jiffies + ticks);
284 EXPORT_SYMBOL(kd_mksound);
287 * Setting the keyboard rate.
290 static int kbd_rate_helper(struct input_handle *handle, void *data)
292 struct input_dev *dev = handle->dev;
293 struct kbd_repeat *rpt = data;
295 if (test_bit(EV_REP, dev->evbit)) {
297 if (rpt[0].delay > 0)
298 input_inject_event(handle,
299 EV_REP, REP_DELAY, rpt[0].delay);
300 if (rpt[0].period > 0)
301 input_inject_event(handle,
302 EV_REP, REP_PERIOD, rpt[0].period);
304 rpt[1].delay = dev->rep[REP_DELAY];
305 rpt[1].period = dev->rep[REP_PERIOD];
311 int kbd_rate(struct kbd_repeat *rpt)
313 struct kbd_repeat data[2] = { *rpt };
315 input_handler_for_each_handle(&kbd_handler, data, kbd_rate_helper);
316 *rpt = data[1]; /* Copy currently used settings */
324 static void put_queue(struct vc_data *vc, int ch)
326 tty_insert_flip_char(&vc->port, ch, 0);
327 tty_schedule_flip(&vc->port);
330 static void puts_queue(struct vc_data *vc, const char *cp)
332 tty_insert_flip_string(&vc->port, cp, strlen(cp));
333 tty_schedule_flip(&vc->port);
336 static void applkey(struct vc_data *vc, int key, char mode)
338 static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
340 buf[1] = (mode ? 'O' : '[');
346 * Many other routines do put_queue, but I think either
347 * they produce ASCII, or they produce some user-assigned
348 * string, and in both cases we might assume that it is
351 static void to_utf8(struct vc_data *vc, uint c)
356 else if (c < 0x800) {
357 /* 110***** 10****** */
358 put_queue(vc, 0xc0 | (c >> 6));
359 put_queue(vc, 0x80 | (c & 0x3f));
360 } else if (c < 0x10000) {
361 if (c >= 0xD800 && c < 0xE000)
365 /* 1110**** 10****** 10****** */
366 put_queue(vc, 0xe0 | (c >> 12));
367 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
368 put_queue(vc, 0x80 | (c & 0x3f));
369 } else if (c < 0x110000) {
370 /* 11110*** 10****** 10****** 10****** */
371 put_queue(vc, 0xf0 | (c >> 18));
372 put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
373 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
374 put_queue(vc, 0x80 | (c & 0x3f));
378 /* FIXME: review locking for vt.c callers */
379 static void set_leds(void)
381 tasklet_schedule(&keyboard_tasklet);
385 * Called after returning from RAW mode or when changing consoles - recompute
386 * shift_down[] and shift_state from key_down[] maybe called when keymap is
387 * undefined, so that shiftkey release is seen. The caller must hold the
391 static void do_compute_shiftstate(void)
393 unsigned int k, sym, val;
396 memset(shift_down, 0, sizeof(shift_down));
398 for_each_set_bit(k, key_down, min(NR_KEYS, KEY_CNT)) {
399 sym = U(key_maps[0][k]);
400 if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
404 if (val == KVAL(K_CAPSSHIFT))
408 shift_state |= BIT(val);
412 /* We still have to export this method to vt.c */
413 void vt_set_leds_compute_shiftstate(void)
419 spin_lock_irqsave(&kbd_event_lock, flags);
420 do_compute_shiftstate();
421 spin_unlock_irqrestore(&kbd_event_lock, flags);
425 * We have a combining character DIACR here, followed by the character CH.
426 * If the combination occurs in the table, return the corresponding value.
427 * Otherwise, if CH is a space or equals DIACR, return DIACR.
428 * Otherwise, conclude that DIACR was not combining after all,
429 * queue it and return CH.
431 static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
433 unsigned int d = diacr;
438 if ((d & ~0xff) == BRL_UC_ROW) {
439 if ((ch & ~0xff) == BRL_UC_ROW)
442 for (i = 0; i < accent_table_size; i++)
443 if (accent_table[i].diacr == d && accent_table[i].base == ch)
444 return accent_table[i].result;
447 if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
450 if (kbd->kbdmode == VC_UNICODE)
453 int c = conv_uni_to_8bit(d);
462 * Special function handlers
464 static void fn_enter(struct vc_data *vc)
467 if (kbd->kbdmode == VC_UNICODE)
470 int c = conv_uni_to_8bit(diacr);
478 if (vc_kbd_mode(kbd, VC_CRLF))
482 static void fn_caps_toggle(struct vc_data *vc)
487 chg_vc_kbd_led(kbd, VC_CAPSLOCK);
490 static void fn_caps_on(struct vc_data *vc)
495 set_vc_kbd_led(kbd, VC_CAPSLOCK);
498 static void fn_show_ptregs(struct vc_data *vc)
500 struct pt_regs *regs = get_irq_regs();
506 static void fn_hold(struct vc_data *vc)
508 struct tty_struct *tty = vc->port.tty;
514 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
515 * these routines are also activated by ^S/^Q.
516 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
524 static void fn_num(struct vc_data *vc)
526 if (vc_kbd_mode(kbd, VC_APPLIC))
533 * Bind this to Shift-NumLock if you work in application keypad mode
534 * but want to be able to change the NumLock flag.
535 * Bind this to NumLock if you prefer that the NumLock key always
536 * changes the NumLock flag.
538 static void fn_bare_num(struct vc_data *vc)
541 chg_vc_kbd_led(kbd, VC_NUMLOCK);
544 static void fn_lastcons(struct vc_data *vc)
546 /* switch to the last used console, ChN */
547 set_console(last_console);
550 static void fn_dec_console(struct vc_data *vc)
552 int i, cur = fg_console;
554 /* Currently switching? Queue this next switch relative to that. */
555 if (want_console != -1)
558 for (i = cur - 1; i != cur; i--) {
560 i = MAX_NR_CONSOLES - 1;
561 if (vc_cons_allocated(i))
567 static void fn_inc_console(struct vc_data *vc)
569 int i, cur = fg_console;
571 /* Currently switching? Queue this next switch relative to that. */
572 if (want_console != -1)
575 for (i = cur+1; i != cur; i++) {
576 if (i == MAX_NR_CONSOLES)
578 if (vc_cons_allocated(i))
584 static void fn_send_intr(struct vc_data *vc)
586 tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
587 tty_schedule_flip(&vc->port);
590 static void fn_scroll_forw(struct vc_data *vc)
595 static void fn_scroll_back(struct vc_data *vc)
600 static void fn_show_mem(struct vc_data *vc)
605 static void fn_show_state(struct vc_data *vc)
610 static void fn_boot_it(struct vc_data *vc)
615 static void fn_compose(struct vc_data *vc)
617 dead_key_next = true;
620 static void fn_spawn_con(struct vc_data *vc)
622 spin_lock(&vt_spawn_con.lock);
623 if (vt_spawn_con.pid)
624 if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) {
625 put_pid(vt_spawn_con.pid);
626 vt_spawn_con.pid = NULL;
628 spin_unlock(&vt_spawn_con.lock);
631 static void fn_SAK(struct vc_data *vc)
633 struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
634 schedule_work(SAK_work);
637 static void fn_null(struct vc_data *vc)
639 do_compute_shiftstate();
643 * Special key handlers
645 static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
649 static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
653 if (value >= ARRAY_SIZE(fn_handler))
655 if ((kbd->kbdmode == VC_RAW ||
656 kbd->kbdmode == VC_MEDIUMRAW ||
657 kbd->kbdmode == VC_OFF) &&
658 value != KVAL(K_SAK))
659 return; /* SAK is allowed even in raw mode */
660 fn_handler[value](vc);
663 static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
665 pr_err("k_lowercase was called - impossible\n");
668 static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
671 return; /* no action, if this is a key release */
674 value = handle_diacr(vc, value);
677 dead_key_next = false;
681 if (kbd->kbdmode == VC_UNICODE)
684 int c = conv_uni_to_8bit(value);
691 * Handle dead key. Note that we now may have several
692 * dead keys modifying the same character. Very useful
695 static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
700 diacr = (diacr ? handle_diacr(vc, value) : value);
703 static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
705 k_unicode(vc, conv_8bit_to_uni(value), up_flag);
708 static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
710 k_deadunicode(vc, value, up_flag);
714 * Obsolete - for backwards compatibility only
716 static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
718 static const unsigned char ret_diacr[NR_DEAD] = {
719 '`', /* dead_grave */
720 '\'', /* dead_acute */
721 '^', /* dead_circumflex */
722 '~', /* dead_tilda */
723 '"', /* dead_diaeresis */
724 ',', /* dead_cedilla */
725 '_', /* dead_macron */
726 'U', /* dead_breve */
727 '.', /* dead_abovedot */
728 '*', /* dead_abovering */
729 '=', /* dead_doubleacute */
730 'c', /* dead_caron */
731 'k', /* dead_ogonek */
733 '#', /* dead_voiced_sound */
734 'o', /* dead_semivoiced_sound */
735 '!', /* dead_belowdot */
738 '-', /* dead_stroke */
739 ')', /* dead_abovecomma */
740 '(', /* dead_abovereversedcomma */
741 ':', /* dead_doublegrave */
742 'n', /* dead_invertedbreve */
743 ';', /* dead_belowcomma */
744 '$', /* dead_currency */
745 '@', /* dead_greek */
748 k_deadunicode(vc, ret_diacr[value], up_flag);
751 static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
759 static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
764 if ((unsigned)value < ARRAY_SIZE(func_table)) {
767 spin_lock_irqsave(&func_buf_lock, flags);
768 if (func_table[value])
769 puts_queue(vc, func_table[value]);
770 spin_unlock_irqrestore(&func_buf_lock, flags);
773 pr_err("k_fn called with value=%d\n", value);
776 static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
778 static const char cur_chars[] = "BDCA";
783 applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
786 static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
788 static const char pad_chars[] = "0123456789+-*/\015,.?()#";
789 static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
792 return; /* no action, if this is a key release */
794 /* kludge... shift forces cursor/number keys */
795 if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
796 applkey(vc, app_map[value], 1);
800 if (!vc_kbd_led(kbd, VC_NUMLOCK)) {
805 k_fn(vc, KVAL(K_REMOVE), 0);
808 k_fn(vc, KVAL(K_INSERT), 0);
811 k_fn(vc, KVAL(K_SELECT), 0);
814 k_cur(vc, KVAL(K_DOWN), 0);
817 k_fn(vc, KVAL(K_PGDN), 0);
820 k_cur(vc, KVAL(K_LEFT), 0);
823 k_cur(vc, KVAL(K_RIGHT), 0);
826 k_fn(vc, KVAL(K_FIND), 0);
829 k_cur(vc, KVAL(K_UP), 0);
832 k_fn(vc, KVAL(K_PGUP), 0);
835 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
840 put_queue(vc, pad_chars[value]);
841 if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
845 static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
847 int old_state = shift_state;
853 * a CapsShift key acts like Shift but undoes CapsLock
855 if (value == KVAL(K_CAPSSHIFT)) {
856 value = KVAL(K_SHIFT);
858 clr_vc_kbd_led(kbd, VC_CAPSLOCK);
863 * handle the case that two shift or control
864 * keys are depressed simultaneously
866 if (shift_down[value])
871 if (shift_down[value])
872 shift_state |= BIT(value);
874 shift_state &= ~BIT(value);
877 if (up_flag && shift_state != old_state && npadch_active) {
878 if (kbd->kbdmode == VC_UNICODE)
879 to_utf8(vc, npadch_value);
881 put_queue(vc, npadch_value & 0xff);
882 npadch_active = false;
886 static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
891 if (vc_kbd_mode(kbd, VC_META)) {
892 put_queue(vc, '\033');
893 put_queue(vc, value);
895 put_queue(vc, value | BIT(7));
898 static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
906 /* decimal input of code, while Alt depressed */
909 /* hexadecimal input of code, while AltGr depressed */
914 if (!npadch_active) {
916 npadch_active = true;
919 npadch_value = npadch_value * base + value;
922 static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
927 chg_vc_kbd_lock(kbd, value);
930 static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
932 k_shift(vc, value, up_flag);
936 chg_vc_kbd_slock(kbd, value);
937 /* try to make Alt, oops, AltGr and such work */
938 if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
940 chg_vc_kbd_slock(kbd, value);
944 /* by default, 300ms interval for combination release */
945 static unsigned brl_timeout = 300;
946 MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
947 module_param(brl_timeout, uint, 0644);
949 static unsigned brl_nbchords = 1;
950 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
951 module_param(brl_nbchords, uint, 0644);
953 static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
955 static unsigned long chords;
956 static unsigned committed;
959 k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
961 committed |= pattern;
963 if (chords == brl_nbchords) {
964 k_unicode(vc, BRL_UC_ROW | committed, up_flag);
971 static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
973 static unsigned pressed, committing;
974 static unsigned long releasestart;
976 if (kbd->kbdmode != VC_UNICODE) {
978 pr_warn("keyboard mode must be unicode for braille patterns\n");
983 k_unicode(vc, BRL_UC_ROW, up_flag);
991 pressed |= BIT(value - 1);
993 committing = pressed;
994 } else if (brl_timeout) {
997 releasestart + msecs_to_jiffies(brl_timeout))) {
998 committing = pressed;
999 releasestart = jiffies;
1001 pressed &= ~BIT(value - 1);
1002 if (!pressed && committing) {
1003 k_brlcommit(vc, committing, 0);
1008 k_brlcommit(vc, committing, 0);
1011 pressed &= ~BIT(value - 1);
1015 #if IS_ENABLED(CONFIG_INPUT_LEDS) && IS_ENABLED(CONFIG_LEDS_TRIGGERS)
1017 struct kbd_led_trigger {
1018 struct led_trigger trigger;
1022 static int kbd_led_trigger_activate(struct led_classdev *cdev)
1024 struct kbd_led_trigger *trigger =
1025 container_of(cdev->trigger, struct kbd_led_trigger, trigger);
1027 tasklet_disable(&keyboard_tasklet);
1028 if (ledstate != -1U)
1029 led_trigger_event(&trigger->trigger,
1030 ledstate & trigger->mask ?
1031 LED_FULL : LED_OFF);
1032 tasklet_enable(&keyboard_tasklet);
1037 #define KBD_LED_TRIGGER(_led_bit, _name) { \
1040 .activate = kbd_led_trigger_activate, \
1042 .mask = BIT(_led_bit), \
1045 #define KBD_LOCKSTATE_TRIGGER(_led_bit, _name) \
1046 KBD_LED_TRIGGER((_led_bit) + 8, _name)
1048 static struct kbd_led_trigger kbd_led_triggers[] = {
1049 KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
1050 KBD_LED_TRIGGER(VC_NUMLOCK, "kbd-numlock"),
1051 KBD_LED_TRIGGER(VC_CAPSLOCK, "kbd-capslock"),
1052 KBD_LED_TRIGGER(VC_KANALOCK, "kbd-kanalock"),
1054 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK, "kbd-shiftlock"),
1055 KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK, "kbd-altgrlock"),
1056 KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK, "kbd-ctrllock"),
1057 KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK, "kbd-altlock"),
1058 KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
1059 KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
1060 KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK, "kbd-ctrlllock"),
1061 KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK, "kbd-ctrlrlock"),
1064 static void kbd_propagate_led_state(unsigned int old_state,
1065 unsigned int new_state)
1067 struct kbd_led_trigger *trigger;
1068 unsigned int changed = old_state ^ new_state;
1071 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1072 trigger = &kbd_led_triggers[i];
1074 if (changed & trigger->mask)
1075 led_trigger_event(&trigger->trigger,
1076 new_state & trigger->mask ?
1077 LED_FULL : LED_OFF);
1081 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1083 unsigned int led_state = *(unsigned int *)data;
1085 if (test_bit(EV_LED, handle->dev->evbit))
1086 kbd_propagate_led_state(~led_state, led_state);
1091 static void kbd_init_leds(void)
1096 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
1097 error = led_trigger_register(&kbd_led_triggers[i].trigger);
1099 pr_err("error %d while registering trigger %s\n",
1100 error, kbd_led_triggers[i].trigger.name);
1106 static int kbd_update_leds_helper(struct input_handle *handle, void *data)
1108 unsigned int leds = *(unsigned int *)data;
1110 if (test_bit(EV_LED, handle->dev->evbit)) {
1111 input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & BIT(0)));
1112 input_inject_event(handle, EV_LED, LED_NUML, !!(leds & BIT(1)));
1113 input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & BIT(2)));
1114 input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
1120 static void kbd_propagate_led_state(unsigned int old_state,
1121 unsigned int new_state)
1123 input_handler_for_each_handle(&kbd_handler, &new_state,
1124 kbd_update_leds_helper);
1127 static void kbd_init_leds(void)
1134 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
1135 * or (ii) whatever pattern of lights people want to show using KDSETLED,
1136 * or (iii) specified bits of specified words in kernel memory.
1138 static unsigned char getledstate(void)
1140 return ledstate & 0xff;
1143 void setledstate(struct kbd_struct *kb, unsigned int led)
1145 unsigned long flags;
1146 spin_lock_irqsave(&led_lock, flags);
1149 kb->ledmode = LED_SHOW_IOCTL;
1151 kb->ledmode = LED_SHOW_FLAGS;
1154 spin_unlock_irqrestore(&led_lock, flags);
1157 static inline unsigned char getleds(void)
1159 struct kbd_struct *kb = kbd_table + fg_console;
1161 if (kb->ledmode == LED_SHOW_IOCTL)
1164 return kb->ledflagstate;
1168 * vt_get_leds - helper for braille console
1169 * @console: console to read
1170 * @flag: flag we want to check
1172 * Check the status of a keyboard led flag and report it back
1174 int vt_get_leds(int console, int flag)
1176 struct kbd_struct *kb = kbd_table + console;
1178 unsigned long flags;
1180 spin_lock_irqsave(&led_lock, flags);
1181 ret = vc_kbd_led(kb, flag);
1182 spin_unlock_irqrestore(&led_lock, flags);
1186 EXPORT_SYMBOL_GPL(vt_get_leds);
1189 * vt_set_led_state - set LED state of a console
1190 * @console: console to set
1193 * Set the LEDs on a console. This is a wrapper for the VT layer
1194 * so that we can keep kbd knowledge internal
1196 void vt_set_led_state(int console, int leds)
1198 struct kbd_struct *kb = kbd_table + console;
1199 setledstate(kb, leds);
1203 * vt_kbd_con_start - Keyboard side of console start
1206 * Handle console start. This is a wrapper for the VT layer
1207 * so that we can keep kbd knowledge internal
1209 * FIXME: We eventually need to hold the kbd lock here to protect
1210 * the LED updating. We can't do it yet because fn_hold calls stop_tty
1211 * and start_tty under the kbd_event_lock, while normal tty paths
1212 * don't hold the lock. We probably need to split out an LED lock
1213 * but not during an -rc release!
1215 void vt_kbd_con_start(int console)
1217 struct kbd_struct *kb = kbd_table + console;
1218 unsigned long flags;
1219 spin_lock_irqsave(&led_lock, flags);
1220 clr_vc_kbd_led(kb, VC_SCROLLOCK);
1222 spin_unlock_irqrestore(&led_lock, flags);
1226 * vt_kbd_con_stop - Keyboard side of console stop
1229 * Handle console stop. This is a wrapper for the VT layer
1230 * so that we can keep kbd knowledge internal
1232 void vt_kbd_con_stop(int console)
1234 struct kbd_struct *kb = kbd_table + console;
1235 unsigned long flags;
1236 spin_lock_irqsave(&led_lock, flags);
1237 set_vc_kbd_led(kb, VC_SCROLLOCK);
1239 spin_unlock_irqrestore(&led_lock, flags);
1243 * This is the tasklet that updates LED state of LEDs using standard
1244 * keyboard triggers. The reason we use tasklet is that we need to
1245 * handle the scenario when keyboard handler is not registered yet
1246 * but we already getting updates from the VT to update led state.
1248 static void kbd_bh(struct tasklet_struct *unused)
1251 unsigned long flags;
1253 spin_lock_irqsave(&led_lock, flags);
1255 leds |= (unsigned int)kbd->lockstate << 8;
1256 spin_unlock_irqrestore(&led_lock, flags);
1258 if (leds != ledstate) {
1259 kbd_propagate_led_state(ledstate, leds);
1264 #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
1265 defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
1266 defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
1267 (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
1269 static inline bool kbd_is_hw_raw(const struct input_dev *dev)
1271 if (!test_bit(EV_MSC, dev->evbit) || !test_bit(MSC_RAW, dev->mscbit))
1274 return dev->id.bustype == BUS_I8042 &&
1275 dev->id.vendor == 0x0001 && dev->id.product == 0x0001;
1278 static const unsigned short x86_keycodes[256] =
1279 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
1280 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
1281 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
1282 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
1283 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
1284 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
1285 284,285,309, 0,312, 91,327,328,329,331,333,335,336,337,338,339,
1286 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
1287 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
1288 103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
1289 291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
1290 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
1291 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
1292 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
1293 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
1296 static int sparc_l1_a_state;
1297 extern void sun_do_break(void);
1300 static int emulate_raw(struct vc_data *vc, unsigned int keycode,
1301 unsigned char up_flag)
1308 put_queue(vc, 0xe1);
1309 put_queue(vc, 0x1d | up_flag);
1310 put_queue(vc, 0x45 | up_flag);
1315 put_queue(vc, 0xf2);
1320 put_queue(vc, 0xf1);
1325 * Real AT keyboards (that's what we're trying
1326 * to emulate here) emit 0xe0 0x2a 0xe0 0x37 when
1327 * pressing PrtSc/SysRq alone, but simply 0x54
1328 * when pressing Alt+PrtSc/SysRq.
1330 if (test_bit(KEY_LEFTALT, key_down) ||
1331 test_bit(KEY_RIGHTALT, key_down)) {
1332 put_queue(vc, 0x54 | up_flag);
1334 put_queue(vc, 0xe0);
1335 put_queue(vc, 0x2a | up_flag);
1336 put_queue(vc, 0xe0);
1337 put_queue(vc, 0x37 | up_flag);
1345 code = x86_keycodes[keycode];
1350 put_queue(vc, 0xe0);
1351 put_queue(vc, (code & 0x7f) | up_flag);
1361 static inline bool kbd_is_hw_raw(const struct input_dev *dev)
1366 static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
1371 put_queue(vc, keycode | up_flag);
1376 static void kbd_rawcode(unsigned char data)
1378 struct vc_data *vc = vc_cons[fg_console].d;
1380 kbd = kbd_table + vc->vc_num;
1381 if (kbd->kbdmode == VC_RAW)
1382 put_queue(vc, data);
1385 static void kbd_keycode(unsigned int keycode, int down, bool hw_raw)
1387 struct vc_data *vc = vc_cons[fg_console].d;
1388 unsigned short keysym, *key_map;
1391 struct tty_struct *tty;
1393 struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
1398 if (tty && (!tty->driver_data)) {
1399 /* No driver data? Strange. Okay we fix it then. */
1400 tty->driver_data = vc;
1403 kbd = kbd_table + vc->vc_num;
1406 if (keycode == KEY_STOP)
1407 sparc_l1_a_state = down;
1412 raw_mode = (kbd->kbdmode == VC_RAW);
1413 if (raw_mode && !hw_raw)
1414 if (emulate_raw(vc, keycode, !down << 7))
1415 if (keycode < BTN_MISC && printk_ratelimit())
1416 pr_warn("can't emulate rawmode for keycode %d\n",
1420 if (keycode == KEY_A && sparc_l1_a_state) {
1421 sparc_l1_a_state = false;
1426 if (kbd->kbdmode == VC_MEDIUMRAW) {
1428 * This is extended medium raw mode, with keys above 127
1429 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
1430 * the 'up' flag if needed. 0 is reserved, so this shouldn't
1431 * interfere with anything else. The two bytes after 0 will
1432 * always have the up flag set not to interfere with older
1433 * applications. This allows for 16384 different keycodes,
1434 * which should be enough.
1436 if (keycode < 128) {
1437 put_queue(vc, keycode | (!down << 7));
1439 put_queue(vc, !down << 7);
1440 put_queue(vc, (keycode >> 7) | BIT(7));
1441 put_queue(vc, keycode | BIT(7));
1446 assign_bit(keycode, key_down, down);
1449 (!vc_kbd_mode(kbd, VC_REPEAT) ||
1450 (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
1452 * Don't repeat a key if the input buffers are not empty and the
1453 * characters get aren't echoed locally. This makes key repeat
1454 * usable with slow applications and under heavy loads.
1459 param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
1460 param.ledstate = kbd->ledflagstate;
1461 key_map = key_maps[shift_final];
1463 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1464 KBD_KEYCODE, ¶m);
1465 if (rc == NOTIFY_STOP || !key_map) {
1466 atomic_notifier_call_chain(&keyboard_notifier_list,
1467 KBD_UNBOUND_KEYCODE, ¶m);
1468 do_compute_shiftstate();
1469 kbd->slockstate = 0;
1473 if (keycode < NR_KEYS)
1474 keysym = key_map[keycode];
1475 else if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
1476 keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
1480 type = KTYP(keysym);
1483 param.value = keysym;
1484 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1485 KBD_UNICODE, ¶m);
1486 if (rc != NOTIFY_STOP)
1487 if (down && !raw_mode)
1488 k_unicode(vc, keysym, !down);
1494 if (type == KT_LETTER) {
1496 if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
1497 key_map = key_maps[shift_final ^ BIT(KG_SHIFT)];
1499 keysym = key_map[keycode];
1503 param.value = keysym;
1504 rc = atomic_notifier_call_chain(&keyboard_notifier_list,
1505 KBD_KEYSYM, ¶m);
1506 if (rc == NOTIFY_STOP)
1509 if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)
1512 (*k_handler[type])(vc, keysym & 0xff, !down);
1514 param.ledstate = kbd->ledflagstate;
1515 atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, ¶m);
1517 if (type != KT_SLOCK)
1518 kbd->slockstate = 0;
1521 static void kbd_event(struct input_handle *handle, unsigned int event_type,
1522 unsigned int event_code, int value)
1524 /* We are called with interrupts disabled, just take the lock */
1525 spin_lock(&kbd_event_lock);
1527 if (event_type == EV_MSC && event_code == MSC_RAW &&
1528 kbd_is_hw_raw(handle->dev))
1530 if (event_type == EV_KEY && event_code <= KEY_MAX)
1531 kbd_keycode(event_code, value, kbd_is_hw_raw(handle->dev));
1533 spin_unlock(&kbd_event_lock);
1535 tasklet_schedule(&keyboard_tasklet);
1536 do_poke_blanked_console = 1;
1537 schedule_console_callback();
1540 static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
1542 if (test_bit(EV_SND, dev->evbit))
1545 if (test_bit(EV_KEY, dev->evbit)) {
1546 if (find_next_bit(dev->keybit, BTN_MISC, KEY_RESERVED) <
1549 if (find_next_bit(dev->keybit, KEY_BRL_DOT10 + 1,
1550 KEY_BRL_DOT1) <= KEY_BRL_DOT10)
1558 * When a keyboard (or other input device) is found, the kbd_connect
1559 * function is called. The function then looks at the device, and if it
1560 * likes it, it can open it and get events from it. In this (kbd_connect)
1561 * function, we should decide which VT to bind that keyboard to initially.
1563 static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
1564 const struct input_device_id *id)
1566 struct input_handle *handle;
1569 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
1574 handle->handler = handler;
1575 handle->name = "kbd";
1577 error = input_register_handle(handle);
1579 goto err_free_handle;
1581 error = input_open_device(handle);
1583 goto err_unregister_handle;
1587 err_unregister_handle:
1588 input_unregister_handle(handle);
1594 static void kbd_disconnect(struct input_handle *handle)
1596 input_close_device(handle);
1597 input_unregister_handle(handle);
1602 * Start keyboard handler on the new keyboard by refreshing LED state to
1603 * match the rest of the system.
1605 static void kbd_start(struct input_handle *handle)
1607 tasklet_disable(&keyboard_tasklet);
1609 if (ledstate != -1U)
1610 kbd_update_leds_helper(handle, &ledstate);
1612 tasklet_enable(&keyboard_tasklet);
1615 static const struct input_device_id kbd_ids[] = {
1617 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1618 .evbit = { BIT_MASK(EV_KEY) },
1622 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1623 .evbit = { BIT_MASK(EV_SND) },
1626 { }, /* Terminating entry */
1629 MODULE_DEVICE_TABLE(input, kbd_ids);
1631 static struct input_handler kbd_handler = {
1634 .connect = kbd_connect,
1635 .disconnect = kbd_disconnect,
1638 .id_table = kbd_ids,
1641 int __init kbd_init(void)
1646 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1647 kbd_table[i].ledflagstate = kbd_defleds();
1648 kbd_table[i].default_ledflagstate = kbd_defleds();
1649 kbd_table[i].ledmode = LED_SHOW_FLAGS;
1650 kbd_table[i].lockstate = KBD_DEFLOCK;
1651 kbd_table[i].slockstate = 0;
1652 kbd_table[i].modeflags = KBD_DEFMODE;
1653 kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
1658 error = input_register_handler(&kbd_handler);
1662 tasklet_enable(&keyboard_tasklet);
1663 tasklet_schedule(&keyboard_tasklet);
1668 /* Ioctl support code */
1671 * vt_do_diacrit - diacritical table updates
1672 * @cmd: ioctl request
1673 * @udp: pointer to user data for ioctl
1674 * @perm: permissions check computed by caller
1676 * Update the diacritical tables atomically and safely. Lock them
1677 * against simultaneous keypresses
1679 int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm)
1681 unsigned long flags;
1688 struct kbdiacrs __user *a = udp;
1689 struct kbdiacr *dia;
1692 dia = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacr),
1697 /* Lock the diacriticals table, make a copy and then
1698 copy it after we unlock */
1699 spin_lock_irqsave(&kbd_event_lock, flags);
1701 asize = accent_table_size;
1702 for (i = 0; i < asize; i++) {
1703 dia[i].diacr = conv_uni_to_8bit(
1704 accent_table[i].diacr);
1705 dia[i].base = conv_uni_to_8bit(
1706 accent_table[i].base);
1707 dia[i].result = conv_uni_to_8bit(
1708 accent_table[i].result);
1710 spin_unlock_irqrestore(&kbd_event_lock, flags);
1712 if (put_user(asize, &a->kb_cnt))
1714 else if (copy_to_user(a->kbdiacr, dia,
1715 asize * sizeof(struct kbdiacr)))
1722 struct kbdiacrsuc __user *a = udp;
1725 buf = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacruc),
1730 /* Lock the diacriticals table, make a copy and then
1731 copy it after we unlock */
1732 spin_lock_irqsave(&kbd_event_lock, flags);
1734 asize = accent_table_size;
1735 memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc));
1737 spin_unlock_irqrestore(&kbd_event_lock, flags);
1739 if (put_user(asize, &a->kb_cnt))
1741 else if (copy_to_user(a->kbdiacruc, buf,
1742 asize*sizeof(struct kbdiacruc)))
1750 struct kbdiacrs __user *a = udp;
1751 struct kbdiacr *dia = NULL;
1757 if (get_user(ct, &a->kb_cnt))
1759 if (ct >= MAX_DIACR)
1764 dia = memdup_user(a->kbdiacr,
1765 sizeof(struct kbdiacr) * ct);
1767 return PTR_ERR(dia);
1771 spin_lock_irqsave(&kbd_event_lock, flags);
1772 accent_table_size = ct;
1773 for (i = 0; i < ct; i++) {
1774 accent_table[i].diacr =
1775 conv_8bit_to_uni(dia[i].diacr);
1776 accent_table[i].base =
1777 conv_8bit_to_uni(dia[i].base);
1778 accent_table[i].result =
1779 conv_8bit_to_uni(dia[i].result);
1781 spin_unlock_irqrestore(&kbd_event_lock, flags);
1788 struct kbdiacrsuc __user *a = udp;
1795 if (get_user(ct, &a->kb_cnt))
1798 if (ct >= MAX_DIACR)
1802 buf = memdup_user(a->kbdiacruc,
1803 ct * sizeof(struct kbdiacruc));
1805 return PTR_ERR(buf);
1807 spin_lock_irqsave(&kbd_event_lock, flags);
1809 memcpy(accent_table, buf,
1810 ct * sizeof(struct kbdiacruc));
1811 accent_table_size = ct;
1812 spin_unlock_irqrestore(&kbd_event_lock, flags);
1821 * vt_do_kdskbmode - set keyboard mode ioctl
1822 * @console: the console to use
1823 * @arg: the requested mode
1825 * Update the keyboard mode bits while holding the correct locks.
1826 * Return 0 for success or an error code.
1828 int vt_do_kdskbmode(int console, unsigned int arg)
1830 struct kbd_struct *kb = kbd_table + console;
1832 unsigned long flags;
1834 spin_lock_irqsave(&kbd_event_lock, flags);
1837 kb->kbdmode = VC_RAW;
1840 kb->kbdmode = VC_MEDIUMRAW;
1843 kb->kbdmode = VC_XLATE;
1844 do_compute_shiftstate();
1847 kb->kbdmode = VC_UNICODE;
1848 do_compute_shiftstate();
1851 kb->kbdmode = VC_OFF;
1856 spin_unlock_irqrestore(&kbd_event_lock, flags);
1861 * vt_do_kdskbmeta - set keyboard meta state
1862 * @console: the console to use
1863 * @arg: the requested meta state
1865 * Update the keyboard meta bits while holding the correct locks.
1866 * Return 0 for success or an error code.
1868 int vt_do_kdskbmeta(int console, unsigned int arg)
1870 struct kbd_struct *kb = kbd_table + console;
1872 unsigned long flags;
1874 spin_lock_irqsave(&kbd_event_lock, flags);
1877 clr_vc_kbd_mode(kb, VC_META);
1880 set_vc_kbd_mode(kb, VC_META);
1885 spin_unlock_irqrestore(&kbd_event_lock, flags);
1889 int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
1892 struct kbkeycode tmp;
1895 if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
1899 kc = getkeycode(tmp.scancode);
1901 kc = put_user(kc, &user_kbkc->keycode);
1906 kc = setkeycode(tmp.scancode, tmp.keycode);
1912 static unsigned short vt_kdgkbent(unsigned char kbdmode, unsigned char idx,
1915 unsigned short *key_map, val;
1916 unsigned long flags;
1918 /* Ensure another thread doesn't free it under us */
1919 spin_lock_irqsave(&kbd_event_lock, flags);
1920 key_map = key_maps[map];
1922 val = U(key_map[idx]);
1923 if (kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
1926 val = idx ? K_HOLE : K_NOSUCHMAP;
1927 spin_unlock_irqrestore(&kbd_event_lock, flags);
1932 static int vt_kdskbent(unsigned char kbdmode, unsigned char idx,
1933 unsigned char map, unsigned short val)
1935 unsigned long flags;
1936 unsigned short *key_map, *new_map, oldval;
1938 if (!idx && val == K_NOSUCHMAP) {
1939 spin_lock_irqsave(&kbd_event_lock, flags);
1940 /* deallocate map */
1941 key_map = key_maps[map];
1942 if (map && key_map) {
1943 key_maps[map] = NULL;
1944 if (key_map[0] == U(K_ALLOCATED)) {
1949 spin_unlock_irqrestore(&kbd_event_lock, flags);
1954 if (KTYP(val) < NR_TYPES) {
1955 if (KVAL(val) > max_vals[KTYP(val)])
1957 } else if (kbdmode != VC_UNICODE)
1960 /* ++Geert: non-PC keyboards may generate keycode zero */
1961 #if !defined(__mc68000__) && !defined(__powerpc__)
1962 /* assignment to entry 0 only tests validity of args */
1967 new_map = kmalloc(sizeof(plain_map), GFP_KERNEL);
1971 spin_lock_irqsave(&kbd_event_lock, flags);
1972 key_map = key_maps[map];
1973 if (key_map == NULL) {
1976 if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
1977 !capable(CAP_SYS_RESOURCE)) {
1978 spin_unlock_irqrestore(&kbd_event_lock, flags);
1982 key_maps[map] = new_map;
1984 key_map[0] = U(K_ALLOCATED);
1985 for (j = 1; j < NR_KEYS; j++)
1986 key_map[j] = U(K_HOLE);
1991 oldval = U(key_map[idx]);
1996 if ((oldval == K_SAK || val == K_SAK) && !capable(CAP_SYS_ADMIN)) {
1997 spin_unlock_irqrestore(&kbd_event_lock, flags);
2001 key_map[idx] = U(val);
2002 if (!map && (KTYP(oldval) == KT_SHIFT || KTYP(val) == KT_SHIFT))
2003 do_compute_shiftstate();
2005 spin_unlock_irqrestore(&kbd_event_lock, flags);
2010 int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
2013 struct kbd_struct *kb = kbd_table + console;
2016 if (copy_from_user(&kbe, user_kbe, sizeof(struct kbentry)))
2021 return put_user(vt_kdgkbent(kb->kbdmode, kbe.kb_index,
2023 &user_kbe->kb_value);
2025 if (!perm || !capable(CAP_SYS_TTY_CONFIG))
2027 return vt_kdskbent(kb->kbdmode, kbe.kb_index, kbe.kb_table,
2033 static char *vt_kdskbsent(char *kbs, unsigned char cur)
2035 static DECLARE_BITMAP(is_kmalloc, MAX_NR_FUNC);
2036 char *cur_f = func_table[cur];
2038 if (cur_f && strlen(cur_f) >= strlen(kbs)) {
2043 func_table[cur] = kbs;
2045 return __test_and_set_bit(cur, is_kmalloc) ? cur_f : NULL;
2048 int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
2050 unsigned char kb_func;
2051 unsigned long flags;
2055 if (get_user(kb_func, &user_kdgkb->kb_func))
2058 kb_func = array_index_nospec(kb_func, MAX_NR_FUNC);
2062 /* size should have been a struct member */
2063 ssize_t len = sizeof(user_kdgkb->kb_string);
2065 kbs = kmalloc(len, GFP_KERNEL);
2069 spin_lock_irqsave(&func_buf_lock, flags);
2070 len = strlcpy(kbs, func_table[kb_func] ? : "", len);
2071 spin_unlock_irqrestore(&func_buf_lock, flags);
2073 ret = copy_to_user(user_kdgkb->kb_string, kbs, len + 1) ?
2079 if (!perm || !capable(CAP_SYS_TTY_CONFIG))
2082 kbs = strndup_user(user_kdgkb->kb_string,
2083 sizeof(user_kdgkb->kb_string));
2085 return PTR_ERR(kbs);
2087 spin_lock_irqsave(&func_buf_lock, flags);
2088 kbs = vt_kdskbsent(kbs, kb_func);
2089 spin_unlock_irqrestore(&func_buf_lock, flags);
2100 int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
2102 struct kbd_struct *kb = kbd_table + console;
2103 unsigned long flags;
2104 unsigned char ucval;
2107 /* the ioctls below read/set the flags usually shown in the leds */
2108 /* don't use them - they will go away without warning */
2110 spin_lock_irqsave(&kbd_event_lock, flags);
2111 ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);
2112 spin_unlock_irqrestore(&kbd_event_lock, flags);
2113 return put_user(ucval, (char __user *)arg);
2120 spin_lock_irqsave(&led_lock, flags);
2121 kb->ledflagstate = (arg & 7);
2122 kb->default_ledflagstate = ((arg >> 4) & 7);
2124 spin_unlock_irqrestore(&led_lock, flags);
2127 /* the ioctls below only set the lights, not the functions */
2128 /* for those, see KDGKBLED and KDSKBLED above */
2130 ucval = getledstate();
2131 return put_user(ucval, (char __user *)arg);
2136 setledstate(kb, arg);
2139 return -ENOIOCTLCMD;
2142 int vt_do_kdgkbmode(int console)
2144 struct kbd_struct *kb = kbd_table + console;
2145 /* This is a spot read so needs no locking */
2146 switch (kb->kbdmode) {
2161 * vt_do_kdgkbmeta - report meta status
2162 * @console: console to report
2164 * Report the meta flag status of this console
2166 int vt_do_kdgkbmeta(int console)
2168 struct kbd_struct *kb = kbd_table + console;
2169 /* Again a spot read so no locking */
2170 return vc_kbd_mode(kb, VC_META) ? K_ESCPREFIX : K_METABIT;
2174 * vt_reset_unicode - reset the unicode status
2175 * @console: console being reset
2177 * Restore the unicode console state to its default
2179 void vt_reset_unicode(int console)
2181 unsigned long flags;
2183 spin_lock_irqsave(&kbd_event_lock, flags);
2184 kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
2185 spin_unlock_irqrestore(&kbd_event_lock, flags);
2189 * vt_get_shift_state - shift bit state
2191 * Report the shift bits from the keyboard state. We have to export
2192 * this to support some oddities in the vt layer.
2194 int vt_get_shift_state(void)
2196 /* Don't lock as this is a transient report */
2201 * vt_reset_keyboard - reset keyboard state
2202 * @console: console to reset
2204 * Reset the keyboard bits for a console as part of a general console
2207 void vt_reset_keyboard(int console)
2209 struct kbd_struct *kb = kbd_table + console;
2210 unsigned long flags;
2212 spin_lock_irqsave(&kbd_event_lock, flags);
2213 set_vc_kbd_mode(kb, VC_REPEAT);
2214 clr_vc_kbd_mode(kb, VC_CKMODE);
2215 clr_vc_kbd_mode(kb, VC_APPLIC);
2216 clr_vc_kbd_mode(kb, VC_CRLF);
2219 spin_lock(&led_lock);
2220 kb->ledmode = LED_SHOW_FLAGS;
2221 kb->ledflagstate = kb->default_ledflagstate;
2222 spin_unlock(&led_lock);
2223 /* do not do set_leds here because this causes an endless tasklet loop
2224 when the keyboard hasn't been initialized yet */
2225 spin_unlock_irqrestore(&kbd_event_lock, flags);
2229 * vt_get_kbd_mode_bit - read keyboard status bits
2230 * @console: console to read from
2231 * @bit: mode bit to read
2233 * Report back a vt mode bit. We do this without locking so the
2234 * caller must be sure that there are no synchronization needs
2237 int vt_get_kbd_mode_bit(int console, int bit)
2239 struct kbd_struct *kb = kbd_table + console;
2240 return vc_kbd_mode(kb, bit);
2244 * vt_set_kbd_mode_bit - read keyboard status bits
2245 * @console: console to read from
2246 * @bit: mode bit to read
2248 * Set a vt mode bit. We do this without locking so the
2249 * caller must be sure that there are no synchronization needs
2252 void vt_set_kbd_mode_bit(int console, int bit)
2254 struct kbd_struct *kb = kbd_table + console;
2255 unsigned long flags;
2257 spin_lock_irqsave(&kbd_event_lock, flags);
2258 set_vc_kbd_mode(kb, bit);
2259 spin_unlock_irqrestore(&kbd_event_lock, flags);
2263 * vt_clr_kbd_mode_bit - read keyboard status bits
2264 * @console: console to read from
2265 * @bit: mode bit to read
2267 * Report back a vt mode bit. We do this without locking so the
2268 * caller must be sure that there are no synchronization needs
2271 void vt_clr_kbd_mode_bit(int console, int bit)
2273 struct kbd_struct *kb = kbd_table + console;
2274 unsigned long flags;
2276 spin_lock_irqsave(&kbd_event_lock, flags);
2277 clr_vc_kbd_mode(kb, bit);
2278 spin_unlock_irqrestore(&kbd_event_lock, flags);