2 * linux/drivers/char/keyboard.c
4 * Written for linux by Johan Myreen as a translation from
5 * the assembly version by Linus (with diacriticals added)
7 * Some additional features added by Christoph Niemann (ChN), March 1993
9 * Loadable keymaps by Risto Kankkunen, May 1993
11 * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993
12 * Added decr/incr_console, dynamic keymaps, Unicode support,
13 * dynamic function/string keys, led setting, Sept 1994
14 * `Sticky' modifier keys, 951006.
16 * 11-11-96: SAK should now work in the raw mode (Martin Mares)
18 * Modified to provide 'generic' keyboard support by Hamish Macdonald
19 * Merge with the m68k keyboard driver and split-off of the PC low-level
20 * parts by Geert Uytterhoeven, May 1997
22 * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
23 * 30-07-98: Dead keys redone, aeb@cwi.nl.
24 * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
27 #include <linux/config.h>
28 #include <linux/module.h>
29 #include <linux/sched.h>
30 #include <linux/tty.h>
31 #include <linux/tty_flip.h>
33 #include <linux/string.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
37 #include <linux/kbd_kern.h>
38 #include <linux/kbd_diacr.h>
39 #include <linux/vt_kern.h>
40 #include <linux/sysrq.h>
41 #include <linux/input.h>
42 #include <linux/reboot.h>
44 static void kbd_disconnect(struct input_handle *handle);
45 extern void ctrl_alt_del(void);
48 * Exported functions/variables
51 #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
54 * Some laptops take the 789uiojklm,. keys as number pad when NumLock is on.
55 * This seems a good reason to start with NumLock off. On HIL keyboards
56 * of PARISC machines however there is no NumLock key and everyone expects the keypad
57 * to be used for numbers.
60 #if defined(CONFIG_PARISC) && (defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD))
61 #define KBD_DEFLEDS (1 << VC_NUMLOCK)
68 void compute_shiftstate(void);
75 k_self, k_fn, k_spec, k_pad,\
76 k_dead, k_cons, k_cur, k_shift,\
77 k_meta, k_ascii, k_lock, k_lowercase,\
78 k_slock, k_dead2, k_brl, k_ignore
80 typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
81 char up_flag, struct pt_regs *regs);
82 static k_handler_fn K_HANDLERS;
83 static k_handler_fn *k_handler[16] = { K_HANDLERS };
86 fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\
87 fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\
88 fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\
89 fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\
90 fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num
92 typedef void (fn_handler_fn)(struct vc_data *vc, struct pt_regs *regs);
93 static fn_handler_fn FN_HANDLERS;
94 static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
97 * Variables exported for vt_ioctl.c
100 /* maximum values each key_handler can handle */
101 const int max_vals[] = {
102 255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
103 NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
104 255, NR_LOCK - 1, 255, NR_BRL - 1
107 const int NR_TYPES = ARRAY_SIZE(max_vals);
109 struct kbd_struct kbd_table[MAX_NR_CONSOLES];
110 static struct kbd_struct *kbd = kbd_table;
111 static struct kbd_struct kbd0;
113 int spawnpid, spawnsig;
116 * Variables exported for vt.c
125 static struct input_handler kbd_handler;
126 static unsigned long key_down[NBITS(KEY_MAX)]; /* keyboard key bitmap */
127 static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */
128 static int dead_key_next;
129 static int npadch = -1; /* -1 or number assembled on pad */
130 static unsigned int diacr;
131 static char rep; /* flag telling character repeat */
133 static unsigned char ledstate = 0xff; /* undefined */
134 static unsigned char ledioctl;
136 static struct ledptr {
139 unsigned char valid:1;
142 /* Simple translation table for the SysRq keys */
144 #ifdef CONFIG_MAGIC_SYSRQ
145 unsigned char kbd_sysrq_xlate[KEY_MAX + 1] =
146 "\000\0331234567890-=\177\t" /* 0x00 - 0x0f */
147 "qwertyuiop[]\r\000as" /* 0x10 - 0x1f */
148 "dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */
149 "bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */
150 "\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */
151 "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
152 "\r\000/"; /* 0x60 - 0x6f */
153 static int sysrq_down;
154 static int sysrq_alt_use;
156 static int sysrq_alt;
159 * Translation of scancodes to keycodes. We set them on only the first attached
160 * keyboard - for per-keyboard setting, /dev/input/event is more useful.
162 int getkeycode(unsigned int scancode)
164 struct list_head *node;
165 struct input_dev *dev = NULL;
167 list_for_each(node, &kbd_handler.h_list) {
168 struct input_handle *handle = to_handle_h(node);
169 if (handle->dev->keycodesize) {
178 if (scancode >= dev->keycodemax)
181 return INPUT_KEYCODE(dev, scancode);
184 int setkeycode(unsigned int scancode, unsigned int keycode)
186 struct list_head *node;
187 struct input_dev *dev = NULL;
188 unsigned int i, oldkey;
190 list_for_each(node, &kbd_handler.h_list) {
191 struct input_handle *handle = to_handle_h(node);
192 if (handle->dev->keycodesize) {
201 if (scancode >= dev->keycodemax)
203 if (keycode < 0 || keycode > KEY_MAX)
205 if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
208 oldkey = SET_INPUT_KEYCODE(dev, scancode, keycode);
210 clear_bit(oldkey, dev->keybit);
211 set_bit(keycode, dev->keybit);
213 for (i = 0; i < dev->keycodemax; i++)
214 if (INPUT_KEYCODE(dev,i) == oldkey)
215 set_bit(oldkey, dev->keybit);
221 * Making beeps and bells.
223 static void kd_nosound(unsigned long ignored)
225 struct list_head *node;
227 list_for_each(node,&kbd_handler.h_list) {
228 struct input_handle *handle = to_handle_h(node);
229 if (test_bit(EV_SND, handle->dev->evbit)) {
230 if (test_bit(SND_TONE, handle->dev->sndbit))
231 input_event(handle->dev, EV_SND, SND_TONE, 0);
232 if (test_bit(SND_BELL, handle->dev->sndbit))
233 input_event(handle->dev, EV_SND, SND_BELL, 0);
238 static DEFINE_TIMER(kd_mksound_timer, kd_nosound, 0, 0);
240 void kd_mksound(unsigned int hz, unsigned int ticks)
242 struct list_head *node;
244 del_timer(&kd_mksound_timer);
247 list_for_each_prev(node, &kbd_handler.h_list) {
248 struct input_handle *handle = to_handle_h(node);
249 if (test_bit(EV_SND, handle->dev->evbit)) {
250 if (test_bit(SND_TONE, handle->dev->sndbit)) {
251 input_event(handle->dev, EV_SND, SND_TONE, hz);
254 if (test_bit(SND_BELL, handle->dev->sndbit)) {
255 input_event(handle->dev, EV_SND, SND_BELL, 1);
261 mod_timer(&kd_mksound_timer, jiffies + ticks);
267 * Setting the keyboard rate.
270 int kbd_rate(struct kbd_repeat *rep)
272 struct list_head *node;
276 list_for_each(node,&kbd_handler.h_list) {
277 struct input_handle *handle = to_handle_h(node);
278 struct input_dev *dev = handle->dev;
280 if (test_bit(EV_REP, dev->evbit)) {
282 input_event(dev, EV_REP, REP_DELAY, rep->delay);
284 input_event(dev, EV_REP, REP_PERIOD, rep->period);
285 d = dev->rep[REP_DELAY];
286 p = dev->rep[REP_PERIOD];
297 static void put_queue(struct vc_data *vc, int ch)
299 struct tty_struct *tty = vc->vc_tty;
302 tty_insert_flip_char(tty, ch, 0);
303 con_schedule_flip(tty);
307 static void puts_queue(struct vc_data *vc, char *cp)
309 struct tty_struct *tty = vc->vc_tty;
315 tty_insert_flip_char(tty, *cp, 0);
318 con_schedule_flip(tty);
321 static void applkey(struct vc_data *vc, int key, char mode)
323 static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
325 buf[1] = (mode ? 'O' : '[');
331 * Many other routines do put_queue, but I think either
332 * they produce ASCII, or they produce some user-assigned
333 * string, and in both cases we might assume that it is
334 * in utf-8 already. UTF-8 is defined for words of up to 31 bits,
335 * but we need only 16 bits here
337 static void to_utf8(struct vc_data *vc, ushort c)
342 else if (c < 0x800) {
343 /* 110***** 10****** */
344 put_queue(vc, 0xc0 | (c >> 6));
345 put_queue(vc, 0x80 | (c & 0x3f));
347 /* 1110**** 10****** 10****** */
348 put_queue(vc, 0xe0 | (c >> 12));
349 put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
350 put_queue(vc, 0x80 | (c & 0x3f));
355 * Called after returning from RAW mode or when changing consoles - recompute
356 * shift_down[] and shift_state from key_down[] maybe called when keymap is
357 * undefined, so that shiftkey release is seen
359 void compute_shiftstate(void)
361 unsigned int i, j, k, sym, val;
364 memset(shift_down, 0, sizeof(shift_down));
366 for (i = 0; i < ARRAY_SIZE(key_down); i++) {
371 k = i * BITS_PER_LONG;
373 for (j = 0; j < BITS_PER_LONG; j++, k++) {
375 if (!test_bit(k, key_down))
378 sym = U(key_maps[0][k]);
379 if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
383 if (val == KVAL(K_CAPSSHIFT))
387 shift_state |= (1 << val);
393 * We have a combining character DIACR here, followed by the character CH.
394 * If the combination occurs in the table, return the corresponding value.
395 * Otherwise, if CH is a space or equals DIACR, return DIACR.
396 * Otherwise, conclude that DIACR was not combining after all,
397 * queue it and return CH.
399 static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
401 unsigned int d = diacr;
406 if ((d & ~0xff) == BRL_UC_ROW) {
407 if ((ch & ~0xff) == BRL_UC_ROW)
410 for (i = 0; i < accent_table_size; i++)
411 if (accent_table[i].diacr == d && accent_table[i].base == ch)
412 return accent_table[i].result;
415 if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
418 if (kbd->kbdmode == VC_UNICODE)
427 * Special function handlers
429 static void fn_enter(struct vc_data *vc, struct pt_regs *regs)
432 if (kbd->kbdmode == VC_UNICODE)
434 else if (diacr < 0x100)
435 put_queue(vc, diacr);
439 if (vc_kbd_mode(kbd, VC_CRLF))
443 static void fn_caps_toggle(struct vc_data *vc, struct pt_regs *regs)
447 chg_vc_kbd_led(kbd, VC_CAPSLOCK);
450 static void fn_caps_on(struct vc_data *vc, struct pt_regs *regs)
454 set_vc_kbd_led(kbd, VC_CAPSLOCK);
457 static void fn_show_ptregs(struct vc_data *vc, struct pt_regs *regs)
463 static void fn_hold(struct vc_data *vc, struct pt_regs *regs)
465 struct tty_struct *tty = vc->vc_tty;
471 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
472 * these routines are also activated by ^S/^Q.
473 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
481 static void fn_num(struct vc_data *vc, struct pt_regs *regs)
483 if (vc_kbd_mode(kbd,VC_APPLIC))
486 fn_bare_num(vc, regs);
490 * Bind this to Shift-NumLock if you work in application keypad mode
491 * but want to be able to change the NumLock flag.
492 * Bind this to NumLock if you prefer that the NumLock key always
493 * changes the NumLock flag.
495 static void fn_bare_num(struct vc_data *vc, struct pt_regs *regs)
498 chg_vc_kbd_led(kbd, VC_NUMLOCK);
501 static void fn_lastcons(struct vc_data *vc, struct pt_regs *regs)
503 /* switch to the last used console, ChN */
504 set_console(last_console);
507 static void fn_dec_console(struct vc_data *vc, struct pt_regs *regs)
509 int i, cur = fg_console;
511 /* Currently switching? Queue this next switch relative to that. */
512 if (want_console != -1)
515 for (i = cur - 1; i != cur; i--) {
517 i = MAX_NR_CONSOLES - 1;
518 if (vc_cons_allocated(i))
524 static void fn_inc_console(struct vc_data *vc, struct pt_regs *regs)
526 int i, cur = fg_console;
528 /* Currently switching? Queue this next switch relative to that. */
529 if (want_console != -1)
532 for (i = cur+1; i != cur; i++) {
533 if (i == MAX_NR_CONSOLES)
535 if (vc_cons_allocated(i))
541 static void fn_send_intr(struct vc_data *vc, struct pt_regs *regs)
543 struct tty_struct *tty = vc->vc_tty;
547 tty_insert_flip_char(tty, 0, TTY_BREAK);
548 con_schedule_flip(tty);
551 static void fn_scroll_forw(struct vc_data *vc, struct pt_regs *regs)
556 static void fn_scroll_back(struct vc_data *vc, struct pt_regs *regs)
561 static void fn_show_mem(struct vc_data *vc, struct pt_regs *regs)
566 static void fn_show_state(struct vc_data *vc, struct pt_regs *regs)
571 static void fn_boot_it(struct vc_data *vc, struct pt_regs *regs)
576 static void fn_compose(struct vc_data *vc, struct pt_regs *regs)
581 static void fn_spawn_con(struct vc_data *vc, struct pt_regs *regs)
584 if (kill_proc(spawnpid, spawnsig, 1))
588 static void fn_SAK(struct vc_data *vc, struct pt_regs *regs)
590 struct tty_struct *tty = vc->vc_tty;
593 * SAK should also work in all raw modes and reset
601 static void fn_null(struct vc_data *vc, struct pt_regs *regs)
603 compute_shiftstate();
607 * Special key handlers
609 static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
613 static void k_spec(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
617 if (value >= ARRAY_SIZE(fn_handler))
619 if ((kbd->kbdmode == VC_RAW ||
620 kbd->kbdmode == VC_MEDIUMRAW) &&
621 value != KVAL(K_SAK))
622 return; /* SAK is allowed even in raw mode */
623 fn_handler[value](vc, regs);
626 static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
628 printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n");
631 static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag, struct pt_regs *regs)
634 return; /* no action, if this is a key release */
637 value = handle_diacr(vc, value);
644 if (kbd->kbdmode == VC_UNICODE)
646 else if (value < 0x100)
647 put_queue(vc, value);
651 * Handle dead key. Note that we now may have several
652 * dead keys modifying the same character. Very useful
655 static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag, struct pt_regs *regs)
659 diacr = (diacr ? handle_diacr(vc, value) : value);
662 static void k_self(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
664 k_unicode(vc, value, up_flag, regs);
667 static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
669 k_deadunicode(vc, value, up_flag, regs);
673 * Obsolete - for backwards compatibility only
675 static void k_dead(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
677 static const unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' };
678 value = ret_diacr[value];
679 k_deadunicode(vc, value, up_flag, regs);
682 static void k_cons(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
689 static void k_fn(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
696 if (v < ARRAY_SIZE(func_table)) {
697 if (func_table[value])
698 puts_queue(vc, func_table[value]);
700 printk(KERN_ERR "k_fn called with value=%d\n", value);
703 static void k_cur(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
705 static const char *cur_chars = "BDCA";
709 applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
712 static void k_pad(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
714 static const char pad_chars[] = "0123456789+-*/\015,.?()#";
715 static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
718 return; /* no action, if this is a key release */
720 /* kludge... shift forces cursor/number keys */
721 if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
722 applkey(vc, app_map[value], 1);
726 if (!vc_kbd_led(kbd, VC_NUMLOCK))
730 k_fn(vc, KVAL(K_REMOVE), 0, regs);
733 k_fn(vc, KVAL(K_INSERT), 0, regs);
736 k_fn(vc, KVAL(K_SELECT), 0, regs);
739 k_cur(vc, KVAL(K_DOWN), 0, regs);
742 k_fn(vc, KVAL(K_PGDN), 0, regs);
745 k_cur(vc, KVAL(K_LEFT), 0, regs);
748 k_cur(vc, KVAL(K_RIGHT), 0, regs);
751 k_fn(vc, KVAL(K_FIND), 0, regs);
754 k_cur(vc, KVAL(K_UP), 0, regs);
757 k_fn(vc, KVAL(K_PGUP), 0, regs);
760 applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
764 put_queue(vc, pad_chars[value]);
765 if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
769 static void k_shift(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
771 int old_state = shift_state;
777 * a CapsShift key acts like Shift but undoes CapsLock
779 if (value == KVAL(K_CAPSSHIFT)) {
780 value = KVAL(K_SHIFT);
782 clr_vc_kbd_led(kbd, VC_CAPSLOCK);
787 * handle the case that two shift or control
788 * keys are depressed simultaneously
790 if (shift_down[value])
795 if (shift_down[value])
796 shift_state |= (1 << value);
798 shift_state &= ~(1 << value);
801 if (up_flag && shift_state != old_state && npadch != -1) {
802 if (kbd->kbdmode == VC_UNICODE)
803 to_utf8(vc, npadch & 0xffff);
805 put_queue(vc, npadch & 0xff);
810 static void k_meta(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
815 if (vc_kbd_mode(kbd, VC_META)) {
816 put_queue(vc, '\033');
817 put_queue(vc, value);
819 put_queue(vc, value | 0x80);
822 static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
830 /* decimal input of code, while Alt depressed */
833 /* hexadecimal input of code, while AltGr depressed */
841 npadch = npadch * base + value;
844 static void k_lock(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
848 chg_vc_kbd_lock(kbd, value);
851 static void k_slock(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
853 k_shift(vc, value, up_flag, regs);
856 chg_vc_kbd_slock(kbd, value);
857 /* try to make Alt, oops, AltGr and such work */
858 if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
860 chg_vc_kbd_slock(kbd, value);
864 /* by default, 300ms interval for combination release */
865 static unsigned brl_timeout = 300;
866 MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
867 module_param(brl_timeout, uint, 0644);
869 static unsigned brl_nbchords = 1;
870 MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
871 module_param(brl_nbchords, uint, 0644);
873 static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag, struct pt_regs *regs)
875 static unsigned long chords;
876 static unsigned committed;
879 k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag, regs);
881 committed |= pattern;
883 if (chords == brl_nbchords) {
884 k_unicode(vc, BRL_UC_ROW | committed, up_flag, regs);
891 static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
893 static unsigned pressed,committing;
894 static unsigned long releasestart;
896 if (kbd->kbdmode != VC_UNICODE) {
898 printk("keyboard mode must be unicode for braille patterns\n");
903 k_unicode(vc, BRL_UC_ROW, up_flag, regs);
913 jiffies - releasestart > (brl_timeout * HZ) / 1000) {
914 committing = pressed;
915 releasestart = jiffies;
917 pressed &= ~(1 << (value - 1));
920 k_brlcommit(vc, committing, 0, regs);
926 k_brlcommit(vc, committing, 0, regs);
929 pressed &= ~(1 << (value - 1));
932 pressed |= 1 << (value - 1);
934 committing = pressed;
939 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
940 * or (ii) whatever pattern of lights people want to show using KDSETLED,
941 * or (iii) specified bits of specified words in kernel memory.
943 unsigned char getledstate(void)
948 void setledstate(struct kbd_struct *kbd, unsigned int led)
952 kbd->ledmode = LED_SHOW_IOCTL;
954 kbd->ledmode = LED_SHOW_FLAGS;
958 static inline unsigned char getleds(void)
960 struct kbd_struct *kbd = kbd_table + fg_console;
964 if (kbd->ledmode == LED_SHOW_IOCTL)
967 leds = kbd->ledflagstate;
969 if (kbd->ledmode == LED_SHOW_MEM) {
970 for (i = 0; i < 3; i++)
971 if (ledptrs[i].valid) {
972 if (*ledptrs[i].addr & ledptrs[i].mask)
982 * This routine is the bottom half of the keyboard interrupt
983 * routine, and runs with all interrupts enabled. It does
984 * console changing, led setting and copy_to_cooked, which can
985 * take a reasonably long time.
987 * Aside from timing (which isn't really that important for
988 * keyboard interrupts as they happen often), using the software
989 * interrupt routines for this thing allows us to easily mask
990 * this when we don't want any of the above to happen.
991 * This allows for easy and efficient race-condition prevention
992 * for kbd_refresh_leds => input_event(dev, EV_LED, ...) => ...
995 static void kbd_bh(unsigned long dummy)
997 struct list_head *node;
998 unsigned char leds = getleds();
1000 if (leds != ledstate) {
1001 list_for_each(node, &kbd_handler.h_list) {
1002 struct input_handle * handle = to_handle_h(node);
1003 input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01));
1004 input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02));
1005 input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04));
1006 input_sync(handle->dev);
1013 DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
1016 * This allows a newly plugged keyboard to pick the LED state.
1018 static void kbd_refresh_leds(struct input_handle *handle)
1020 unsigned char leds = ledstate;
1022 tasklet_disable(&keyboard_tasklet);
1024 input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01));
1025 input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02));
1026 input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04));
1027 input_sync(handle->dev);
1029 tasklet_enable(&keyboard_tasklet);
1032 #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
1033 defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
1034 defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
1035 (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
1037 #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
1038 ((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
1040 static const unsigned short x86_keycodes[256] =
1041 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
1042 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
1043 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
1044 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
1045 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
1046 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
1047 284,285,309,298,312, 91,327,328,329,331,333,335,336,337,338,339,
1048 367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
1049 360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
1050 103,104,105,275,287,279,306,106,274,107,294,364,358,363,362,361,
1051 291,108,381,281,290,272,292,305,280, 99,112,257,258,359,113,114,
1052 264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
1053 377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
1054 308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
1055 332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
1057 #ifdef CONFIG_MAC_EMUMOUSEBTN
1058 extern int mac_hid_mouse_emulate_buttons(int, int, int);
1059 #endif /* CONFIG_MAC_EMUMOUSEBTN */
1062 static int sparc_l1_a_state = 0;
1063 extern void sun_do_break(void);
1066 static int emulate_raw(struct vc_data *vc, unsigned int keycode,
1067 unsigned char up_flag)
1069 if (keycode > 255 || !x86_keycodes[keycode])
1074 put_queue(vc, 0xe1);
1075 put_queue(vc, 0x1d | up_flag);
1076 put_queue(vc, 0x45 | up_flag);
1080 put_queue(vc, 0xf2);
1084 put_queue(vc, 0xf1);
1088 if (keycode == KEY_SYSRQ && sysrq_alt) {
1089 put_queue(vc, 0x54 | up_flag);
1093 if (x86_keycodes[keycode] & 0x100)
1094 put_queue(vc, 0xe0);
1096 put_queue(vc, (x86_keycodes[keycode] & 0x7f) | up_flag);
1098 if (keycode == KEY_SYSRQ) {
1099 put_queue(vc, 0xe0);
1100 put_queue(vc, 0x37 | up_flag);
1108 #define HW_RAW(dev) 0
1110 #warning "Cannot generate rawmode keyboard for your architecture yet."
1112 static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
1117 put_queue(vc, keycode | up_flag);
1122 static void kbd_rawcode(unsigned char data)
1124 struct vc_data *vc = vc_cons[fg_console].d;
1125 kbd = kbd_table + fg_console;
1126 if (kbd->kbdmode == VC_RAW)
1127 put_queue(vc, data);
1130 static void kbd_keycode(unsigned int keycode, int down,
1131 int hw_raw, struct pt_regs *regs)
1133 struct vc_data *vc = vc_cons[fg_console].d;
1134 unsigned short keysym, *key_map;
1135 unsigned char type, raw_mode;
1136 struct tty_struct *tty;
1141 if (tty && (!tty->driver_data)) {
1142 /* No driver data? Strange. Okay we fix it then. */
1143 tty->driver_data = vc;
1146 kbd = kbd_table + fg_console;
1148 if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT)
1149 sysrq_alt = down ? keycode : 0;
1151 if (keycode == KEY_STOP)
1152 sparc_l1_a_state = down;
1157 #ifdef CONFIG_MAC_EMUMOUSEBTN
1158 if (mac_hid_mouse_emulate_buttons(1, keycode, down))
1160 #endif /* CONFIG_MAC_EMUMOUSEBTN */
1162 if ((raw_mode = (kbd->kbdmode == VC_RAW)) && !hw_raw)
1163 if (emulate_raw(vc, keycode, !down << 7))
1164 if (keycode < BTN_MISC)
1165 printk(KERN_WARNING "keyboard.c: can't emulate rawmode for keycode %d\n", keycode);
1167 #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
1168 if (keycode == KEY_SYSRQ && (sysrq_down || (down == 1 && sysrq_alt))) {
1171 sysrq_alt_use = sysrq_alt;
1175 if (sysrq_down && !down && keycode == sysrq_alt_use)
1177 if (sysrq_down && down && !rep) {
1178 handle_sysrq(kbd_sysrq_xlate[keycode], regs, tty);
1183 if (keycode == KEY_A && sparc_l1_a_state) {
1184 sparc_l1_a_state = 0;
1189 if (kbd->kbdmode == VC_MEDIUMRAW) {
1191 * This is extended medium raw mode, with keys above 127
1192 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
1193 * the 'up' flag if needed. 0 is reserved, so this shouldn't
1194 * interfere with anything else. The two bytes after 0 will
1195 * always have the up flag set not to interfere with older
1196 * applications. This allows for 16384 different keycodes,
1197 * which should be enough.
1199 if (keycode < 128) {
1200 put_queue(vc, keycode | (!down << 7));
1202 put_queue(vc, !down << 7);
1203 put_queue(vc, (keycode >> 7) | 0x80);
1204 put_queue(vc, keycode | 0x80);
1210 set_bit(keycode, key_down);
1212 clear_bit(keycode, key_down);
1215 (!vc_kbd_mode(kbd, VC_REPEAT) ||
1216 (tty && !L_ECHO(tty) && tty->driver->chars_in_buffer(tty)))) {
1218 * Don't repeat a key if the input buffers are not empty and the
1219 * characters get aren't echoed locally. This makes key repeat
1220 * usable with slow applications and under heavy loads.
1225 shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
1226 key_map = key_maps[shift_final];
1229 compute_shiftstate();
1230 kbd->slockstate = 0;
1234 if (keycode > NR_KEYS)
1235 if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
1236 keysym = K(KT_BRL, keycode - KEY_BRL_DOT1 + 1);
1240 keysym = key_map[keycode];
1242 type = KTYP(keysym);
1245 if (down && !raw_mode)
1246 to_utf8(vc, keysym);
1252 if (raw_mode && type != KT_SPEC && type != KT_SHIFT)
1255 if (type == KT_LETTER) {
1257 if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
1258 key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
1260 keysym = key_map[keycode];
1264 (*k_handler[type])(vc, keysym & 0xff, !down, regs);
1266 if (type != KT_SLOCK)
1267 kbd->slockstate = 0;
1270 static void kbd_event(struct input_handle *handle, unsigned int event_type,
1271 unsigned int event_code, int value)
1273 if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
1275 if (event_type == EV_KEY)
1276 kbd_keycode(event_code, value, HW_RAW(handle->dev), handle->dev->regs);
1277 tasklet_schedule(&keyboard_tasklet);
1278 do_poke_blanked_console = 1;
1279 schedule_console_callback();
1283 * When a keyboard (or other input device) is found, the kbd_connect
1284 * function is called. The function then looks at the device, and if it
1285 * likes it, it can open it and get events from it. In this (kbd_connect)
1286 * function, we should decide which VT to bind that keyboard to initially.
1288 static struct input_handle *kbd_connect(struct input_handler *handler,
1289 struct input_dev *dev,
1290 struct input_device_id *id)
1292 struct input_handle *handle;
1295 for (i = KEY_RESERVED; i < BTN_MISC; i++)
1296 if (test_bit(i, dev->keybit))
1299 if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit))
1302 if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
1304 memset(handle, 0, sizeof(struct input_handle));
1307 handle->handler = handler;
1308 handle->name = "kbd";
1310 input_open_device(handle);
1311 kbd_refresh_leds(handle);
1316 static void kbd_disconnect(struct input_handle *handle)
1318 input_close_device(handle);
1322 static struct input_device_id kbd_ids[] = {
1324 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1325 .evbit = { BIT(EV_KEY) },
1329 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
1330 .evbit = { BIT(EV_SND) },
1333 { }, /* Terminating entry */
1336 MODULE_DEVICE_TABLE(input, kbd_ids);
1338 static struct input_handler kbd_handler = {
1340 .connect = kbd_connect,
1341 .disconnect = kbd_disconnect,
1343 .id_table = kbd_ids,
1346 int __init kbd_init(void)
1350 kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS;
1351 kbd0.ledmode = LED_SHOW_FLAGS;
1352 kbd0.lockstate = KBD_DEFLOCK;
1353 kbd0.slockstate = 0;
1354 kbd0.modeflags = KBD_DEFMODE;
1355 kbd0.kbdmode = VC_XLATE;
1357 for (i = 0 ; i < MAX_NR_CONSOLES ; i++)
1358 kbd_table[i] = kbd0;
1360 input_register_handler(&kbd_handler);
1362 tasklet_enable(&keyboard_tasklet);
1363 tasklet_schedule(&keyboard_tasklet);