text: // SPDX-License-Identifier: GPL-2.0
  /*
   * Written for linux by Johan Myreen as a translation from
   * the assembly version by Linus (with diacriticals added)
   *
   * Some additional features added by Christoph Niemann (ChN), March 1993
   *
   * Loadable keymaps by Risto Kankkunen, May 1993
   *
   * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993
   * Added decr/incr_console, dynamic keymaps, Unicode support,
   * dynamic function/string keys, led setting,  Sept 1994
   * `Sticky' modifier keys, 951006.
   *
   * 11-11-96: SAK should now work in the raw mode (Martin Mares)
   *
   * Modified to provide 'generic' keyboard support by Hamish Macdonald
   * Merge with the m68k keyboard driver and split-off of the PC low-level
   * parts by Geert Uytterhoeven, May 1997
   *
   * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
   * 30-07-98: Dead keys redone, aeb@cwi.nl.
   * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
   */
  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/consolemap.h>
  #include <linux/module.h>
  #include <linux/sched/signal.h>
  #include <linux/sched/debug.h>
  #include <linux/tty.h>
  #include <linux/tty_flip.h>
  #include <linux/mm.h>
  #include <linux/string.h>
  #include <linux/init.h>
  #include <linux/slab.h>
  #include <linux/leds.h>
  
  #include <linux/kbd_kern.h>
  #include <linux/kbd_diacr.h>
  #include <linux/vt_kern.h>
  #include <linux/input.h>
  #include <linux/reboot.h>
  #include <linux/notifier.h>
  #include <linux/jiffies.h>
  #include <linux/uaccess.h>
  
  #include <asm/irq_regs.h>
  
  extern void ctrl_alt_del(void);
  
  /*
   * Exported functions/variables
   */
  
  #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
  
  #if defined(CONFIG_X86) || defined(CONFIG_PARISC)
  #include <asm/kbdleds.h>
  #else
  static inline int kbd_defleds(void)
  {
  	return 0;
  }
  #endif
  
  #define KBD_DEFLOCK 0
  
  /*
   * Handler Tables.
   */
  
  #define K_HANDLERS\
  	k_self,		k_fn,		k_spec,		k_pad,\
  	k_dead,		k_cons,		k_cur,		k_shift,\
  	k_meta,		k_ascii,	k_lock,		k_lowercase,\
  	k_slock,	k_dead2,	k_brl,		k_ignore
  
  typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
  			    char up_flag);
  static k_handler_fn K_HANDLERS;
  static k_handler_fn *k_handler[16] = { K_HANDLERS };
  
  #define FN_HANDLERS\
  	fn_null,	fn_enter,	fn_show_ptregs,	fn_show_mem,\
  	fn_show_state,	fn_send_intr,	fn_lastcons,	fn_caps_toggle,\
  	fn_num,		fn_hold,	fn_scroll_forw,	fn_scroll_back,\
  	fn_boot_it,	fn_caps_on,	fn_compose,	fn_SAK,\
  	fn_dec_console, fn_inc_console, fn_spawn_con,	fn_bare_num
  
  typedef void (fn_handler_fn)(struct vc_data *vc);
  static fn_handler_fn FN_HANDLERS;
  static fn_handler_fn *fn_handler[] = { FN_HANDLERS };
  
  /*
   * Variables exported for vt_ioctl.c
   */
  
  struct vt_spawn_console vt_spawn_con = {
  	.lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock),
  	.pid  = NULL,
  	.sig  = 0,
  };
  
  
  /*
   * Internal Data.
   */
  
  static struct kbd_struct kbd_table[MAX_NR_CONSOLES];
  static struct kbd_struct *kbd = kbd_table;
  
  /* maximum values each key_handler can handle */
  static const int max_vals[] = {
  	255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
  	NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
  	255, NR_LOCK - 1, 255, NR_BRL - 1
  };
  
  static const int NR_TYPES = ARRAY_SIZE(max_vals);
  
  static struct input_handler kbd_handler;
  static DEFINE_SPINLOCK(kbd_event_lock);
  static DEFINE_SPINLOCK(led_lock);
  static DEFINE_SPINLOCK(func_buf_lock); /* guard 'func_buf'  and friends */
  static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)];	/* keyboard key bitmap */
  static unsigned char shift_down[NR_SHIFT];		/* shift state counters.. */
  static bool dead_key_next;
  static int npadch = -1;					/* -1 or number assembled on pad */
  static unsigned int diacr;
  static char rep;					/* flag telling character repeat */
  
  static int shift_state = 0;
  
  static unsigned int ledstate = -1U;			/* undefined */
  static unsigned char ledioctl;
  
  /*
   * Notifier list for console keyboard events
   */
  static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);
  
  int register_keyboard_notifier(struct notifier_block *nb)
  {
  	return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
  }
  EXPORT_SYMBOL_GPL(register_keyboard_notifier);
  
  int unregister_keyboard_notifier(struct notifier_block *nb)
  {
  	return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
  }
  EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);
  
  /*
   * Translation of scancodes to keycodes. We set them on only the first
   * keyboard in the list that accepts the scancode and keycode.
   * Explanation for not choosing the first attached keyboard anymore:
   *  USB keyboards for example have two event devices: one for all "normal"
   *  keys and one for extra function keys (like "volume up", "make coffee",
   *  etc.). So this means that scancodes for the extra function keys won't
   *  be valid for the first event device, but will be for the second.
   */
  
  struct getset_keycode_data {
  	struct input_keymap_entry ke;
  	int error;
  };
  
  static int getkeycode_helper(struct input_handle *handle, void *data)
  {
  	struct getset_keycode_data *d = data;
  
  	d->error = input_get_keycode(handle->dev, &d->ke);
  
  	return d->error == 0; /* stop as soon as we successfully get one */
  }
  
  static int getkeycode(unsigned int scancode)
  {
  	struct getset_keycode_data d = {
  		.ke	= {
  			.flags		= 0,
  			.len		= sizeof(scancode),
  			.keycode	= 0,
  		},
  		.error	= -ENODEV,
  	};
  
  	memcpy(d.ke.scancode, &scancode, sizeof(scancode));
  
  	input_handler_for_each_handle(&kbd_handler, &d, getkeycode_helper);
  
  	return d.error ?: d.ke.keycode;
  }
  
  static int setkeycode_helper(struct input_handle *handle, void *data)
  {
  	struct getset_keycode_data *d = data;
  
  	d->error = input_set_keycode(handle->dev, &d->ke);
  
  	return d->error == 0; /* stop as soon as we successfully set one */
  }
  
  static int setkeycode(unsigned int scancode, unsigned int keycode)
  {
  	struct getset_keycode_data d = {
  		.ke	= {
  			.flags		= 0,
  			.len		= sizeof(scancode),
  			.keycode	= keycode,
  		},
  		.error	= -ENODEV,
  	};
  
  	memcpy(d.ke.scancode, &scancode, sizeof(scancode));
  
  	input_handler_for_each_handle(&kbd_handler, &d, setkeycode_helper);
  
  	return d.error;
  }
  
  /*
   * Making beeps and bells. Note that we prefer beeps to bells, but when
   * shutting the sound off we do both.
   */
  
  static int kd_sound_helper(struct input_handle *handle, void *data)
  {
  	unsigned int *hz = data;
  	struct input_dev *dev = handle->dev;
  
  	if (test_bit(EV_SND, dev->evbit)) {
  		if (test_bit(SND_TONE, dev->sndbit)) {
  			input_inject_event(handle, EV_SND, SND_TONE, *hz);
  			if (*hz)
  				return 0;
  		}
  		if (test_bit(SND_BELL, dev->sndbit))
  			input_inject_event(handle, EV_SND, SND_BELL, *hz ? 1 : 0);
  	}
  
  	return 0;
  }
  
  static void kd_nosound(struct timer_list *unused)
  {
  	static unsigned int zero;
  
  	input_handler_for_each_handle(&kbd_handler, &zero, kd_sound_helper);
  }
  
  static DEFINE_TIMER(kd_mksound_timer, kd_nosound);
  
  void kd_mksound(unsigned int hz, unsigned int ticks)
  {
  	del_timer_sync(&kd_mksound_timer);
  
  	input_handler_for_each_handle(&kbd_handler, &hz, kd_sound_helper);
  
  	if (hz && ticks)
  		mod_timer(&kd_mksound_timer, jiffies + ticks);
  }
  EXPORT_SYMBOL(kd_mksound);
  
  /*
   * Setting the keyboard rate.
   */
  
  static int kbd_rate_helper(struct input_handle *handle, void *data)
  {
  	struct input_dev *dev = handle->dev;
  	struct kbd_repeat *rpt = data;
  
  	if (test_bit(EV_REP, dev->evbit)) {
  
  		if (rpt[0].delay > 0)
  			input_inject_event(handle,
  					   EV_REP, REP_DELAY, rpt[0].delay);
  		if (rpt[0].period > 0)
  			input_inject_event(handle,
  					   EV_REP, REP_PERIOD, rpt[0].period);
  
  		rpt[1].delay = dev->rep[REP_DELAY];
  		rpt[1].period = dev->rep[REP_PERIOD];
  	}
  
  	return 0;
  }
  
  int kbd_rate(struct kbd_repeat *rpt)
  {
  	struct kbd_repeat data[2] = { *rpt };
  
  	input_handler_for_each_handle(&kbd_handler, data, kbd_rate_helper);
  	*rpt = data[1];	/* Copy currently used settings */
  
  	return 0;
  }
  
  /*
   * Helper Functions.
   */
  static void put_queue(struct vc_data *vc, int ch)
  {
  	tty_insert_flip_char(&vc->port, ch, 0);
  	tty_schedule_flip(&vc->port);
  }
  
  static void puts_queue(struct vc_data *vc, char *cp)
  {
  	while (*cp) {
  		tty_insert_flip_char(&vc->port, *cp, 0);
  		cp++;
  	}
  	tty_schedule_flip(&vc->port);
  }
  
  static void applkey(struct vc_data *vc, int key, char mode)
  {
  	static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
  
  	buf[1] = (mode ? 'O' : '[');
  	buf[2] = key;
  	puts_queue(vc, buf);
  }
  
  /*
   * Many other routines do put_queue, but I think either
   * they produce ASCII, or they produce some user-assigned
   * string, and in both cases we might assume that it is
   * in utf-8 already.
   */
  static void to_utf8(struct vc_data *vc, uint c)
  {
  	if (c < 0x80)
  		/*  0******* */
  		put_queue(vc, c);
  	else if (c < 0x800) {
  		/* 110***** 10****** */
  		put_queue(vc, 0xc0 | (c >> 6));
  		put_queue(vc, 0x80 | (c & 0x3f));
  	} else if (c < 0x10000) {
  		if (c >= 0xD800 && c < 0xE000)
  			return;
  		if (c == 0xFFFF)
  			return;
  		/* 1110**** 10****** 10****** */
  		put_queue(vc, 0xe0 | (c >> 12));
  		put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
  		put_queue(vc, 0x80 | (c & 0x3f));
  	} else if (c < 0x110000) {
  		/* 11110*** 10****** 10****** 10****** */
  		put_queue(vc, 0xf0 | (c >> 18));
  		put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
  		put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
  		put_queue(vc, 0x80 | (c & 0x3f));
  	}
  }
  
  /*
   * Called after returning from RAW mode or when changing consoles - recompute
   * shift_down[] and shift_state from key_down[] maybe called when keymap is
   * undefined, so that shiftkey release is seen. The caller must hold the
   * kbd_event_lock.
   */
  
  static void do_compute_shiftstate(void)
  {
  	unsigned int k, sym, val;
  
  	shift_state = 0;
  	memset(shift_down, 0, sizeof(shift_down));
  
  	for_each_set_bit(k, key_down, min(NR_KEYS, KEY_CNT)) {
  		sym = U(key_maps[0][k]);
  		if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
  			continue;
  
  		val = KVAL(sym);
  		if (val == KVAL(K_CAPSSHIFT))
  			val = KVAL(K_SHIFT);
  
  		shift_down[val]++;
  		shift_state |= BIT(val);
  	}
  }
  
  /* We still have to export this method to vt.c */
  void compute_shiftstate(void)
  {
  	unsigned long flags;
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	do_compute_shiftstate();
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  }
  
  /*
   * We have a combining character DIACR here, followed by the character CH.
   * If the combination occurs in the table, return the corresponding value.
   * Otherwise, if CH is a space or equals DIACR, return DIACR.
   * Otherwise, conclude that DIACR was not combining after all,
   * queue it and return CH.
   */
  static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
  {
  	unsigned int d = diacr;
  	unsigned int i;
  
  	diacr = 0;
  
  	if ((d & ~0xff) == BRL_UC_ROW) {
  		if ((ch & ~0xff) == BRL_UC_ROW)
  			return d | ch;
  	} else {
  		for (i = 0; i < accent_table_size; i++)
  			if (accent_table[i].diacr == d && accent_table[i].base == ch)
  				return accent_table[i].result;
  	}
  
  	if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
  		return d;
  
  	if (kbd->kbdmode == VC_UNICODE)
  		to_utf8(vc, d);
  	else {
  		int c = conv_uni_to_8bit(d);
  		if (c != -1)
  			put_queue(vc, c);
  	}
  
  	return ch;
  }
  
  /*
   * Special function handlers
   */
  static void fn_enter(struct vc_data *vc)
  {
  	if (diacr) {
  		if (kbd->kbdmode == VC_UNICODE)
  			to_utf8(vc, diacr);
  		else {
  			int c = conv_uni_to_8bit(diacr);
  			if (c != -1)
  				put_queue(vc, c);
  		}
  		diacr = 0;
  	}
  
  	put_queue(vc, 13);
  	if (vc_kbd_mode(kbd, VC_CRLF))
  		put_queue(vc, 10);
  }
  
  static void fn_caps_toggle(struct vc_data *vc)
  {
  	if (rep)
  		return;
  
  	chg_vc_kbd_led(kbd, VC_CAPSLOCK);
  }
  
  static void fn_caps_on(struct vc_data *vc)
  {
  	if (rep)
  		return;
  
  	set_vc_kbd_led(kbd, VC_CAPSLOCK);
  }
  
  static void fn_show_ptregs(struct vc_data *vc)
  {
  	struct pt_regs *regs = get_irq_regs();
  
  	if (regs)
  		show_regs(regs);
  }
  
  static void fn_hold(struct vc_data *vc)
  {
  	struct tty_struct *tty = vc->port.tty;
  
  	if (rep || !tty)
  		return;
  
  	/*
  	 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
  	 * these routines are also activated by ^S/^Q.
  	 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
  	 */
  	if (tty->stopped)
  		start_tty(tty);
  	else
  		stop_tty(tty);
  }
  
  static void fn_num(struct vc_data *vc)
  {
  	if (vc_kbd_mode(kbd, VC_APPLIC))
  		applkey(vc, 'P', 1);
  	else
  		fn_bare_num(vc);
  }
  
  /*
   * Bind this to Shift-NumLock if you work in application keypad mode
   * but want to be able to change the NumLock flag.
   * Bind this to NumLock if you prefer that the NumLock key always
   * changes the NumLock flag.
   */
  static void fn_bare_num(struct vc_data *vc)
  {
  	if (!rep)
  		chg_vc_kbd_led(kbd, VC_NUMLOCK);
  }
  
  static void fn_lastcons(struct vc_data *vc)
  {
  	/* switch to the last used console, ChN */
  	set_console(last_console);
  }
  
  static void fn_dec_console(struct vc_data *vc)
  {
  	int i, cur = fg_console;
  
  	/* Currently switching?  Queue this next switch relative to that. */
  	if (want_console != -1)
  		cur = want_console;
  
  	for (i = cur - 1; i != cur; i--) {
  		if (i == -1)
  			i = MAX_NR_CONSOLES - 1;
  		if (vc_cons_allocated(i))
  			break;
  	}
  	set_console(i);
  }
  
  static void fn_inc_console(struct vc_data *vc)
  {
  	int i, cur = fg_console;
  
  	/* Currently switching?  Queue this next switch relative to that. */
  	if (want_console != -1)
  		cur = want_console;
  
  	for (i = cur+1; i != cur; i++) {
  		if (i == MAX_NR_CONSOLES)
  			i = 0;
  		if (vc_cons_allocated(i))
  			break;
  	}
  	set_console(i);
  }
  
  static void fn_send_intr(struct vc_data *vc)
  {
  	tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
  	tty_schedule_flip(&vc->port);
  }
  
  static void fn_scroll_forw(struct vc_data *vc)
  {
  	scrollfront(vc, 0);
  }
  
  static void fn_scroll_back(struct vc_data *vc)
  {
  	scrollback(vc);
  }
  
  static void fn_show_mem(struct vc_data *vc)
  {
  	show_mem(0, NULL);
  }
  
  static void fn_show_state(struct vc_data *vc)
  {
  	show_state();
  }
  
  static void fn_boot_it(struct vc_data *vc)
  {
  	ctrl_alt_del();
  }
  
  static void fn_compose(struct vc_data *vc)
  {
  	dead_key_next = true;
  }
  
  static void fn_spawn_con(struct vc_data *vc)
  {
  	spin_lock(&vt_spawn_con.lock);
  	if (vt_spawn_con.pid)
  		if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) {
  			put_pid(vt_spawn_con.pid);
  			vt_spawn_con.pid = NULL;
  		}
  	spin_unlock(&vt_spawn_con.lock);
  }
  
  static void fn_SAK(struct vc_data *vc)
  {
  	struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
  	schedule_work(SAK_work);
  }
  
  static void fn_null(struct vc_data *vc)
  {
  	do_compute_shiftstate();
  }
  
  /*
   * Special key handlers
   */
  static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
  {
  }
  
  static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	if (up_flag)
  		return;
  	if (value >= ARRAY_SIZE(fn_handler))
  		return;
  	if ((kbd->kbdmode == VC_RAW ||
  	     kbd->kbdmode == VC_MEDIUMRAW ||
  	     kbd->kbdmode == VC_OFF) &&
  	     value != KVAL(K_SAK))
  		return;		/* SAK is allowed even in raw mode */
  	fn_handler[value](vc);
  }
  
  static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	pr_err("k_lowercase was called - impossible\n");
  }
  
  static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
  {
  	if (up_flag)
  		return;		/* no action, if this is a key release */
  
  	if (diacr)
  		value = handle_diacr(vc, value);
  
  	if (dead_key_next) {
  		dead_key_next = false;
  		diacr = value;
  		return;
  	}
  	if (kbd->kbdmode == VC_UNICODE)
  		to_utf8(vc, value);
  	else {
  		int c = conv_uni_to_8bit(value);
  		if (c != -1)
  			put_queue(vc, c);
  	}
  }
  
  /*
   * Handle dead key. Note that we now may have several
   * dead keys modifying the same character. Very useful
   * for Vietnamese.
   */
  static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
  {
  	if (up_flag)
  		return;
  
  	diacr = (diacr ? handle_diacr(vc, value) : value);
  }
  
  static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	k_unicode(vc, conv_8bit_to_uni(value), up_flag);
  }
  
  static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	k_deadunicode(vc, value, up_flag);
  }
  
  /*
   * Obsolete - for backwards compatibility only
   */
  static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	static const unsigned char ret_diacr[NR_DEAD] = {
  		'`',	/* dead_grave */
  		'\'',	/* dead_acute */
  		'^',	/* dead_circumflex */
  		'~',	/* dead_tilda */
  		'"',	/* dead_diaeresis */
  		',',	/* dead_cedilla */
  		'_',	/* dead_macron */
  		'U',	/* dead_breve */
  		'.',	/* dead_abovedot */
  		'*',	/* dead_abovering */
  		'=',	/* dead_doubleacute */
  		'c',	/* dead_caron */
  		'k',	/* dead_ogonek */
  		'i',	/* dead_iota */
  		'#',	/* dead_voiced_sound */
  		'o',	/* dead_semivoiced_sound */
  		'!',	/* dead_belowdot */
  		'?',	/* dead_hook */
  		'+',	/* dead_horn */
  		'-',	/* dead_stroke */
  		')',	/* dead_abovecomma */
  		'(',	/* dead_abovereversedcomma */
  		':',	/* dead_doublegrave */
  		'n',	/* dead_invertedbreve */
  		';',	/* dead_belowcomma */
  		'$',	/* dead_currency */
  		'@',	/* dead_greek */
  	};
  
  	k_deadunicode(vc, ret_diacr[value], up_flag);
  }
  
  static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	if (up_flag)
  		return;
  
  	set_console(value);
  }
  
  static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	if (up_flag)
  		return;
  
  	if ((unsigned)value < ARRAY_SIZE(func_table)) {
  		if (func_table[value])
  			puts_queue(vc, func_table[value]);
  	} else
  		pr_err("k_fn called with value=%d\n", value);
  }
  
  static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	static const char cur_chars[] = "BDCA";
  
  	if (up_flag)
  		return;
  
  	applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
  }
  
  static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	static const char pad_chars[] = "0123456789+-*/\015,.?()#";
  	static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";
  
  	if (up_flag)
  		return;		/* no action, if this is a key release */
  
  	/* kludge... shift forces cursor/number keys */
  	if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
  		applkey(vc, app_map[value], 1);
  		return;
  	}
  
  	if (!vc_kbd_led(kbd, VC_NUMLOCK)) {
  
  		switch (value) {
  		case KVAL(K_PCOMMA):
  		case KVAL(K_PDOT):
  			k_fn(vc, KVAL(K_REMOVE), 0);
  			return;
  		case KVAL(K_P0):
  			k_fn(vc, KVAL(K_INSERT), 0);
  			return;
  		case KVAL(K_P1):
  			k_fn(vc, KVAL(K_SELECT), 0);
  			return;
  		case KVAL(K_P2):
  			k_cur(vc, KVAL(K_DOWN), 0);
  			return;
  		case KVAL(K_P3):
  			k_fn(vc, KVAL(K_PGDN), 0);
  			return;
  		case KVAL(K_P4):
  			k_cur(vc, KVAL(K_LEFT), 0);
  			return;
  		case KVAL(K_P6):
  			k_cur(vc, KVAL(K_RIGHT), 0);
  			return;
  		case KVAL(K_P7):
  			k_fn(vc, KVAL(K_FIND), 0);
  			return;
  		case KVAL(K_P8):
  			k_cur(vc, KVAL(K_UP), 0);
  			return;
  		case KVAL(K_P9):
  			k_fn(vc, KVAL(K_PGUP), 0);
  			return;
  		case KVAL(K_P5):
  			applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
  			return;
  		}
  	}
  
  	put_queue(vc, pad_chars[value]);
  	if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
  		put_queue(vc, 10);
  }
  
  static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	int old_state = shift_state;
  
  	if (rep)
  		return;
  	/*
  	 * Mimic typewriter:
  	 * a CapsShift key acts like Shift but undoes CapsLock
  	 */
  	if (value == KVAL(K_CAPSSHIFT)) {
  		value = KVAL(K_SHIFT);
  		if (!up_flag)
  			clr_vc_kbd_led(kbd, VC_CAPSLOCK);
  	}
  
  	if (up_flag) {
  		/*
  		 * handle the case that two shift or control
  		 * keys are depressed simultaneously
  		 */
  		if (shift_down[value])
  			shift_down[value]--;
  	} else
  		shift_down[value]++;
  
  	if (shift_down[value])
  		shift_state |= (1 << value);
  	else
  		shift_state &= ~(1 << value);
  
  	/* kludge */
  	if (up_flag && shift_state != old_state && npadch != -1) {
  		if (kbd->kbdmode == VC_UNICODE)
  			to_utf8(vc, npadch);
  		else
  			put_queue(vc, npadch & 0xff);
  		npadch = -1;
  	}
  }
  
  static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	if (up_flag)
  		return;
  
  	if (vc_kbd_mode(kbd, VC_META)) {
  		put_queue(vc, '\033');
  		put_queue(vc, value);
  	} else
  		put_queue(vc, value | 0x80);
  }
  
  static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	int base;
  
  	if (up_flag)
  		return;
  
  	if (value < 10) {
  		/* decimal input of code, while Alt depressed */
  		base = 10;
  	} else {
  		/* hexadecimal input of code, while AltGr depressed */
  		value -= 10;
  		base = 16;
  	}
  
  	if (npadch == -1)
  		npadch = value;
  	else
  		npadch = npadch * base + value;
  }
  
  static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	if (up_flag || rep)
  		return;
  
  	chg_vc_kbd_lock(kbd, value);
  }
  
  static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	k_shift(vc, value, up_flag);
  	if (up_flag || rep)
  		return;
  
  	chg_vc_kbd_slock(kbd, value);
  	/* try to make Alt, oops, AltGr and such work */
  	if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
  		kbd->slockstate = 0;
  		chg_vc_kbd_slock(kbd, value);
  	}
  }
  
  /* by default, 300ms interval for combination release */
  static unsigned brl_timeout = 300;
  MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
  module_param(brl_timeout, uint, 0644);
  
  static unsigned brl_nbchords = 1;
  MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
  module_param(brl_nbchords, uint, 0644);
  
  static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
  {
  	static unsigned long chords;
  	static unsigned committed;
  
  	if (!brl_nbchords)
  		k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
  	else {
  		committed |= pattern;
  		chords++;
  		if (chords == brl_nbchords) {
  			k_unicode(vc, BRL_UC_ROW | committed, up_flag);
  			chords = 0;
  			committed = 0;
  		}
  	}
  }
  
  static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
  {
  	static unsigned pressed, committing;
  	static unsigned long releasestart;
  
  	if (kbd->kbdmode != VC_UNICODE) {
  		if (!up_flag)
  			pr_warn("keyboard mode must be unicode for braille patterns\n");
  		return;
  	}
  
  	if (!value) {
  		k_unicode(vc, BRL_UC_ROW, up_flag);
  		return;
  	}
  
  	if (value > 8)
  		return;
  
  	if (!up_flag) {
  		pressed |= 1 << (value - 1);
  		if (!brl_timeout)
  			committing = pressed;
  	} else if (brl_timeout) {
  		if (!committing ||
  		    time_after(jiffies,
  			       releasestart + msecs_to_jiffies(brl_timeout))) {
  			committing = pressed;
  			releasestart = jiffies;
  		}
  		pressed &= ~(1 << (value - 1));
  		if (!pressed && committing) {
  			k_brlcommit(vc, committing, 0);
  			committing = 0;
  		}
  	} else {
  		if (committing) {
  			k_brlcommit(vc, committing, 0);
  			committing = 0;
  		}
  		pressed &= ~(1 << (value - 1));
  	}
  }
  
  #if IS_ENABLED(CONFIG_INPUT_LEDS) && IS_ENABLED(CONFIG_LEDS_TRIGGERS)
  
  struct kbd_led_trigger {
  	struct led_trigger trigger;
  	unsigned int mask;
  };
  
  static int kbd_led_trigger_activate(struct led_classdev *cdev)
  {
  	struct kbd_led_trigger *trigger =
  		container_of(cdev->trigger, struct kbd_led_trigger, trigger);
  
  	tasklet_disable(&keyboard_tasklet);
  	if (ledstate != -1U)
  		led_trigger_event(&trigger->trigger,
  				  ledstate & trigger->mask ?
  					LED_FULL : LED_OFF);
  	tasklet_enable(&keyboard_tasklet);
  
  	return 0;
  }
  
  #define KBD_LED_TRIGGER(_led_bit, _name) {			\
  		.trigger = {					\
  			.name = _name,				\
  			.activate = kbd_led_trigger_activate,	\
  		},						\
  		.mask	= BIT(_led_bit),			\
  	}
  
  #define KBD_LOCKSTATE_TRIGGER(_led_bit, _name)		\
  	KBD_LED_TRIGGER((_led_bit) + 8, _name)
  
  static struct kbd_led_trigger kbd_led_triggers[] = {
  	KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
  	KBD_LED_TRIGGER(VC_NUMLOCK,   "kbd-numlock"),
  	KBD_LED_TRIGGER(VC_CAPSLOCK,  "kbd-capslock"),
  	KBD_LED_TRIGGER(VC_KANALOCK,  "kbd-kanalock"),
  
  	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK,  "kbd-shiftlock"),
  	KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK,  "kbd-altgrlock"),
  	KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK,   "kbd-ctrllock"),
  	KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK,    "kbd-altlock"),
  	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
  	KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
  	KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK,  "kbd-ctrlllock"),
  	KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK,  "kbd-ctrlrlock"),
  };
  
  static void kbd_propagate_led_state(unsigned int old_state,
  				    unsigned int new_state)
  {
  	struct kbd_led_trigger *trigger;
  	unsigned int changed = old_state ^ new_state;
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
  		trigger = &kbd_led_triggers[i];
  
  		if (changed & trigger->mask)
  			led_trigger_event(&trigger->trigger,
  					  new_state & trigger->mask ?
  						LED_FULL : LED_OFF);
  	}
  }
  
  static int kbd_update_leds_helper(struct input_handle *handle, void *data)
  {
  	unsigned int led_state = *(unsigned int *)data;
  
  	if (test_bit(EV_LED, handle->dev->evbit))
  		kbd_propagate_led_state(~led_state, led_state);
  
  	return 0;
  }
  
  static void kbd_init_leds(void)
  {
  	int error;
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); i++) {
  		error = led_trigger_register(&kbd_led_triggers[i].trigger);
  		if (error)
  			pr_err("error %d while registering trigger %s\n",
  			       error, kbd_led_triggers[i].trigger.name);
  	}
  }
  
  #else
  
  static int kbd_update_leds_helper(struct input_handle *handle, void *data)
  {
  	unsigned int leds = *(unsigned int *)data;
  
  	if (test_bit(EV_LED, handle->dev->evbit)) {
  		input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
  		input_inject_event(handle, EV_LED, LED_NUML,    !!(leds & 0x02));
  		input_inject_event(handle, EV_LED, LED_CAPSL,   !!(leds & 0x04));
  		input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
  	}
  
  	return 0;
  }
  
  static void kbd_propagate_led_state(unsigned int old_state,
  				    unsigned int new_state)
  {
  	input_handler_for_each_handle(&kbd_handler, &new_state,
  				      kbd_update_leds_helper);
  }
  
  static void kbd_init_leds(void)
  {
  }
  
  #endif
  
  /*
   * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
   * or (ii) whatever pattern of lights people want to show using KDSETLED,
   * or (iii) specified bits of specified words in kernel memory.
   */
  static unsigned char getledstate(void)
  {
  	return ledstate & 0xff;
  }
  
  void setledstate(struct kbd_struct *kb, unsigned int led)
  {
          unsigned long flags;
          spin_lock_irqsave(&led_lock, flags);
  	if (!(led & ~7)) {
  		ledioctl = led;
  		kb->ledmode = LED_SHOW_IOCTL;
  	} else
  		kb->ledmode = LED_SHOW_FLAGS;
  
  	set_leds();
  	spin_unlock_irqrestore(&led_lock, flags);
  }
  
  static inline unsigned char getleds(void)
  {
  	struct kbd_struct *kb = kbd_table + fg_console;
  
  	if (kb->ledmode == LED_SHOW_IOCTL)
  		return ledioctl;
  
  	return kb->ledflagstate;
  }
  
  /**
   *	vt_get_leds	-	helper for braille console
   *	@console: console to read
   *	@flag: flag we want to check
   *
   *	Check the status of a keyboard led flag and report it back
   */
  int vt_get_leds(int console, int flag)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	int ret;
  	unsigned long flags;
  
  	spin_lock_irqsave(&led_lock, flags);
  	ret = vc_kbd_led(kb, flag);
  	spin_unlock_irqrestore(&led_lock, flags);
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(vt_get_leds);
  
  /**
   *	vt_set_led_state	-	set LED state of a console
   *	@console: console to set
   *	@leds: LED bits
   *
   *	Set the LEDs on a console. This is a wrapper for the VT layer
   *	so that we can keep kbd knowledge internal
   */
  void vt_set_led_state(int console, int leds)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	setledstate(kb, leds);
  }
  
  /**
   *	vt_kbd_con_start	-	Keyboard side of console start
   *	@console: console
   *
   *	Handle console start. This is a wrapper for the VT layer
   *	so that we can keep kbd knowledge internal
   *
   *	FIXME: We eventually need to hold the kbd lock here to protect
   *	the LED updating. We can't do it yet because fn_hold calls stop_tty
   *	and start_tty under the kbd_event_lock, while normal tty paths
   *	don't hold the lock. We probably need to split out an LED lock
   *	but not during an -rc release!
   */
  void vt_kbd_con_start(int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	unsigned long flags;
  	spin_lock_irqsave(&led_lock, flags);
  	clr_vc_kbd_led(kb, VC_SCROLLOCK);
  	set_leds();
  	spin_unlock_irqrestore(&led_lock, flags);
  }
  
  /**
   *	vt_kbd_con_stop		-	Keyboard side of console stop
   *	@console: console
   *
   *	Handle console stop. This is a wrapper for the VT layer
   *	so that we can keep kbd knowledge internal
   */
  void vt_kbd_con_stop(int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	unsigned long flags;
  	spin_lock_irqsave(&led_lock, flags);
  	set_vc_kbd_led(kb, VC_SCROLLOCK);
  	set_leds();
  	spin_unlock_irqrestore(&led_lock, flags);
  }
  
  /*
   * This is the tasklet that updates LED state of LEDs using standard
   * keyboard triggers. The reason we use tasklet is that we need to
   * handle the scenario when keyboard handler is not registered yet
   * but we already getting updates from the VT to update led state.
   */
  static void kbd_bh(unsigned long dummy)
  {
  	unsigned int leds;
  	unsigned long flags;
  
  	spin_lock_irqsave(&led_lock, flags);
  	leds = getleds();
  	leds |= (unsigned int)kbd->lockstate << 8;
  	spin_unlock_irqrestore(&led_lock, flags);
  
  	if (leds != ledstate) {
  		kbd_propagate_led_state(ledstate, leds);
  		ledstate = leds;
  	}
  }
  
  DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);
  
  #if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
      defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
      defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
      (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
  
  #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
  			((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
  
  static const unsigned short x86_keycodes[256] =
  	{ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  	 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  	 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  	 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
  	 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
  	 80, 81, 82, 83, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
  	284,285,309,  0,312, 91,327,328,329,331,333,335,336,337,338,339,
  	367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
  	360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
  	103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
  	291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
  	264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
  	377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
  	308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
  	332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };
  
  #ifdef CONFIG_SPARC
  static int sparc_l1_a_state;
  extern void sun_do_break(void);
  #endif
  
  static int emulate_raw(struct vc_data *vc, unsigned int keycode,
  		       unsigned char up_flag)
  {
  	int code;
  
  	switch (keycode) {
  
  	case KEY_PAUSE:
  		put_queue(vc, 0xe1);
  		put_queue(vc, 0x1d | up_flag);
  		put_queue(vc, 0x45 | up_flag);
  		break;
  
  	case KEY_HANGEUL:
  		if (!up_flag)
  			put_queue(vc, 0xf2);
  		break;
  
  	case KEY_HANJA:
  		if (!up_flag)
  			put_queue(vc, 0xf1);
  		break;
  
  	case KEY_SYSRQ:
  		/*
  		 * Real AT keyboards (that's what we're trying
  		 * to emulate here) emit 0xe0 0x2a 0xe0 0x37 when
  		 * pressing PrtSc/SysRq alone, but simply 0x54
  		 * when pressing Alt+PrtSc/SysRq.
  		 */
  		if (test_bit(KEY_LEFTALT, key_down) ||
  		    test_bit(KEY_RIGHTALT, key_down)) {
  			put_queue(vc, 0x54 | up_flag);
  		} else {
  			put_queue(vc, 0xe0);
  			put_queue(vc, 0x2a | up_flag);
  			put_queue(vc, 0xe0);
  			put_queue(vc, 0x37 | up_flag);
  		}
  		break;
  
  	default:
  		if (keycode > 255)
  			return -1;
  
  		code = x86_keycodes[keycode];
  		if (!code)
  			return -1;
  
  		if (code & 0x100)
  			put_queue(vc, 0xe0);
  		put_queue(vc, (code & 0x7f) | up_flag);
  
  		break;
  	}
  
  	return 0;
  }
  
  #else
  
  #define HW_RAW(dev)	0
  
  static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
  {
  	if (keycode > 127)
  		return -1;
  
  	put_queue(vc, keycode | up_flag);
  	return 0;
  }
  #endif
  
  static void kbd_rawcode(unsigned char data)
  {
  	struct vc_data *vc = vc_cons[fg_console].d;
  
  	kbd = kbd_table + vc->vc_num;
  	if (kbd->kbdmode == VC_RAW)
  		put_queue(vc, data);
  }
  
  static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
  {
  	struct vc_data *vc = vc_cons[fg_console].d;
  	unsigned short keysym, *key_map;
  	unsigned char type;
  	bool raw_mode;
  	struct tty_struct *tty;
  	int shift_final;
  	struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
  	int rc;
  
  	tty = vc->port.tty;
  
  	if (tty && (!tty->driver_data)) {
  		/* No driver data? Strange. Okay we fix it then. */
  		tty->driver_data = vc;
  	}
  
  	kbd = kbd_table + vc->vc_num;
  
  #ifdef CONFIG_SPARC
  	if (keycode == KEY_STOP)
  		sparc_l1_a_state = down;
  #endif
  
  	rep = (down == 2);
  
  	raw_mode = (kbd->kbdmode == VC_RAW);
  	if (raw_mode && !hw_raw)
  		if (emulate_raw(vc, keycode, !down << 7))
  			if (keycode < BTN_MISC && printk_ratelimit())
  				pr_warn("can't emulate rawmode for keycode %d\n",
  					keycode);
  
  #ifdef CONFIG_SPARC
  	if (keycode == KEY_A && sparc_l1_a_state) {
  		sparc_l1_a_state = false;
  		sun_do_break();
  	}
  #endif
  
  	if (kbd->kbdmode == VC_MEDIUMRAW) {
  		/*
  		 * This is extended medium raw mode, with keys above 127
  		 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
  		 * the 'up' flag if needed. 0 is reserved, so this shouldn't
  		 * interfere with anything else. The two bytes after 0 will
  		 * always have the up flag set not to interfere with older
  		 * applications. This allows for 16384 different keycodes,
  		 * which should be enough.
  		 */
  		if (keycode < 128) {
  			put_queue(vc, keycode | (!down << 7));
  		} else {
  			put_queue(vc, !down << 7);
  			put_queue(vc, (keycode >> 7) | 0x80);
  			put_queue(vc, keycode | 0x80);
  		}
  		raw_mode = true;
  	}
  
  	if (down)
  		set_bit(keycode, key_down);
  	else
  		clear_bit(keycode, key_down);
  
  	if (rep &&
  	    (!vc_kbd_mode(kbd, VC_REPEAT) ||
  	     (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
  		/*
  		 * Don't repeat a key if the input buffers are not empty and the
  		 * characters get aren't echoed locally. This makes key repeat
  		 * usable with slow applications and under heavy loads.
  		 */
  		return;
  	}
  
  	param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
  	param.ledstate = kbd->ledflagstate;
  	key_map = key_maps[shift_final];
  
  	rc = atomic_notifier_call_chain(&keyboard_notifier_list,
  					KBD_KEYCODE, &param);
  	if (rc == NOTIFY_STOP || !key_map) {
  		atomic_notifier_call_chain(&keyboard_notifier_list,
  					   KBD_UNBOUND_KEYCODE, &param);
  		do_compute_shiftstate();
  		kbd->slockstate = 0;
  		return;
  	}
  
  	if (keycode < NR_KEYS)
  		keysym = key_map[keycode];
  	else if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
  		keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
  	else
  		return;
  
  	type = KTYP(keysym);
  
  	if (type < 0xf0) {
  		param.value = keysym;
  		rc = atomic_notifier_call_chain(&keyboard_notifier_list,
  						KBD_UNICODE, &param);
  		if (rc != NOTIFY_STOP)
  			if (down && !raw_mode)
  				to_utf8(vc, keysym);
  		return;
  	}
  
  	type -= 0xf0;
  
  	if (type == KT_LETTER) {
  		type = KT_LATIN;
  		if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
  			key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
  			if (key_map)
  				keysym = key_map[keycode];
  		}
  	}
  
  	param.value = keysym;
  	rc = atomic_notifier_call_chain(&keyboard_notifier_list,
  					KBD_KEYSYM, &param);
  	if (rc == NOTIFY_STOP)
  		return;
  
  	if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)
  		return;
  
  	(*k_handler[type])(vc, keysym & 0xff, !down);
  
  	param.ledstate = kbd->ledflagstate;
  	atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, &param);
  
  	if (type != KT_SLOCK)
  		kbd->slockstate = 0;
  }
  
  static void kbd_event(struct input_handle *handle, unsigned int event_type,
  		      unsigned int event_code, int value)
  {
  	/* We are called with interrupts disabled, just take the lock */
  	spin_lock(&kbd_event_lock);
  
  	if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
  		kbd_rawcode(value);
  	if (event_type == EV_KEY)
  		kbd_keycode(event_code, value, HW_RAW(handle->dev));
  
  	spin_unlock(&kbd_event_lock);
  
  	tasklet_schedule(&keyboard_tasklet);
  	do_poke_blanked_console = 1;
  	schedule_console_callback();
  }
  
  static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
  {
  	int i;
  
  	if (test_bit(EV_SND, dev->evbit))
  		return true;
  
  	if (test_bit(EV_KEY, dev->evbit)) {
  		for (i = KEY_RESERVED; i < BTN_MISC; i++)
  			if (test_bit(i, dev->keybit))
  				return true;
  		for (i = KEY_BRL_DOT1; i <= KEY_BRL_DOT10; i++)
  			if (test_bit(i, dev->keybit))
  				return true;
  	}
  
  	return false;
  }
  
  /*
   * When a keyboard (or other input device) is found, the kbd_connect
   * function is called. The function then looks at the device, and if it
   * likes it, it can open it and get events from it. In this (kbd_connect)
   * function, we should decide which VT to bind that keyboard to initially.
   */
  static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
  			const struct input_device_id *id)
  {
  	struct input_handle *handle;
  	int error;
  
  	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
  	if (!handle)
  		return -ENOMEM;
  
  	handle->dev = dev;
  	handle->handler = handler;
  	handle->name = "kbd";
  
  	error = input_register_handle(handle);
  	if (error)
  		goto err_free_handle;
  
  	error = input_open_device(handle);
  	if (error)
  		goto err_unregister_handle;
  
  	return 0;
  
   err_unregister_handle:
  	input_unregister_handle(handle);
   err_free_handle:
  	kfree(handle);
  	return error;
  }
  
  static void kbd_disconnect(struct input_handle *handle)
  {
  	input_close_device(handle);
  	input_unregister_handle(handle);
  	kfree(handle);
  }
  
  /*
   * Start keyboard handler on the new keyboard by refreshing LED state to
   * match the rest of the system.
   */
  static void kbd_start(struct input_handle *handle)
  {
  	tasklet_disable(&keyboard_tasklet);
  
  	if (ledstate != -1U)
  		kbd_update_leds_helper(handle, &ledstate);
  
  	tasklet_enable(&keyboard_tasklet);
  }
  
  static const struct input_device_id kbd_ids[] = {
  	{
  		.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
  		.evbit = { BIT_MASK(EV_KEY) },
  	},
  
  	{
  		.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
  		.evbit = { BIT_MASK(EV_SND) },
  	},
  
  	{ },    /* Terminating entry */
  };
  
  MODULE_DEVICE_TABLE(input, kbd_ids);
  
  static struct input_handler kbd_handler = {
  	.event		= kbd_event,
  	.match		= kbd_match,
  	.connect	= kbd_connect,
  	.disconnect	= kbd_disconnect,
  	.start		= kbd_start,
  	.name		= "kbd",
  	.id_table	= kbd_ids,
  };
  
  int __init kbd_init(void)
  {
  	int i;
  	int error;
  
  	for (i = 0; i < MAX_NR_CONSOLES; i++) {
  		kbd_table[i].ledflagstate = kbd_defleds();
  		kbd_table[i].default_ledflagstate = kbd_defleds();
  		kbd_table[i].ledmode = LED_SHOW_FLAGS;
  		kbd_table[i].lockstate = KBD_DEFLOCK;
  		kbd_table[i].slockstate = 0;
  		kbd_table[i].modeflags = KBD_DEFMODE;
  		kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
  	}
  
  	kbd_init_leds();
  
  	error = input_register_handler(&kbd_handler);
  	if (error)
  		return error;
  
  	tasklet_enable(&keyboard_tasklet);
  	tasklet_schedule(&keyboard_tasklet);
  
  	return 0;
  }
  
  /* Ioctl support code */
  
  /**
   *	vt_do_diacrit		-	diacritical table updates
   *	@cmd: ioctl request
   *	@udp: pointer to user data for ioctl
   *	@perm: permissions check computed by caller
   *
   *	Update the diacritical tables atomically and safely. Lock them
   *	against simultaneous keypresses
   */
  int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm)
  {
  	unsigned long flags;
  	int asize;
  	int ret = 0;
  
  	switch (cmd) {
  	case KDGKBDIACR:
  	{
  		struct kbdiacrs __user *a = udp;
  		struct kbdiacr *dia;
  		int i;
  
  		dia = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacr),
  								GFP_KERNEL);
  		if (!dia)
  			return -ENOMEM;
  
  		/* Lock the diacriticals table, make a copy and then
  		   copy it after we unlock */
  		spin_lock_irqsave(&kbd_event_lock, flags);
  
  		asize = accent_table_size;
  		for (i = 0; i < asize; i++) {
  			dia[i].diacr = conv_uni_to_8bit(
  						accent_table[i].diacr);
  			dia[i].base = conv_uni_to_8bit(
  						accent_table[i].base);
  			dia[i].result = conv_uni_to_8bit(
  						accent_table[i].result);
  		}
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  
  		if (put_user(asize, &a->kb_cnt))
  			ret = -EFAULT;
  		else  if (copy_to_user(a->kbdiacr, dia,
  				asize * sizeof(struct kbdiacr)))
  			ret = -EFAULT;
  		kfree(dia);
  		return ret;
  	}
  	case KDGKBDIACRUC:
  	{
  		struct kbdiacrsuc __user *a = udp;
  		void *buf;
  
  		buf = kmalloc_array(MAX_DIACR, sizeof(struct kbdiacruc),
  								GFP_KERNEL);
  		if (buf == NULL)
  			return -ENOMEM;
  
  		/* Lock the diacriticals table, make a copy and then
  		   copy it after we unlock */
  		spin_lock_irqsave(&kbd_event_lock, flags);
  
  		asize = accent_table_size;
  		memcpy(buf, accent_table, asize * sizeof(struct kbdiacruc));
  
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  
  		if (put_user(asize, &a->kb_cnt))
  			ret = -EFAULT;
  		else if (copy_to_user(a->kbdiacruc, buf,
  				asize*sizeof(struct kbdiacruc)))
  			ret = -EFAULT;
  		kfree(buf);
  		return ret;
  	}
  
  	case KDSKBDIACR:
  	{
  		struct kbdiacrs __user *a = udp;
  		struct kbdiacr *dia = NULL;
  		unsigned int ct;
  		int i;
  
  		if (!perm)
  			return -EPERM;
  		if (get_user(ct, &a->kb_cnt))
  			return -EFAULT;
  		if (ct >= MAX_DIACR)
  			return -EINVAL;
  
  		if (ct) {
  
  			dia = memdup_user(a->kbdiacr,
  					sizeof(struct kbdiacr) * ct);
  			if (IS_ERR(dia))
  				return PTR_ERR(dia);
  
  		}
  
  		spin_lock_irqsave(&kbd_event_lock, flags);
  		accent_table_size = ct;
  		for (i = 0; i < ct; i++) {
  			accent_table[i].diacr =
  					conv_8bit_to_uni(dia[i].diacr);
  			accent_table[i].base =
  					conv_8bit_to_uni(dia[i].base);
  			accent_table[i].result =
  					conv_8bit_to_uni(dia[i].result);
  		}
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  		kfree(dia);
  		return 0;
  	}
  
  	case KDSKBDIACRUC:
  	{
  		struct kbdiacrsuc __user *a = udp;
  		unsigned int ct;
  		void *buf = NULL;
  
  		if (!perm)
  			return -EPERM;
  
  		if (get_user(ct, &a->kb_cnt))
  			return -EFAULT;
  
  		if (ct >= MAX_DIACR)
  			return -EINVAL;
  
  		if (ct) {
  			buf = memdup_user(a->kbdiacruc,
  					  ct * sizeof(struct kbdiacruc));
  			if (IS_ERR(buf))
  				return PTR_ERR(buf);
  		} 
  		spin_lock_irqsave(&kbd_event_lock, flags);
  		if (ct)
  			memcpy(accent_table, buf,
  					ct * sizeof(struct kbdiacruc));
  		accent_table_size = ct;
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  		kfree(buf);
  		return 0;
  	}
  	}
  	return ret;
  }
  
  /**
   *	vt_do_kdskbmode		-	set keyboard mode ioctl
   *	@console: the console to use
   *	@arg: the requested mode
   *
   *	Update the keyboard mode bits while holding the correct locks.
   *	Return 0 for success or an error code.
   */
  int vt_do_kdskbmode(int console, unsigned int arg)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	int ret = 0;
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	switch(arg) {
  	case K_RAW:
  		kb->kbdmode = VC_RAW;
  		break;
  	case K_MEDIUMRAW:
  		kb->kbdmode = VC_MEDIUMRAW;
  		break;
  	case K_XLATE:
  		kb->kbdmode = VC_XLATE;
  		do_compute_shiftstate();
  		break;
  	case K_UNICODE:
  		kb->kbdmode = VC_UNICODE;
  		do_compute_shiftstate();
  		break;
  	case K_OFF:
  		kb->kbdmode = VC_OFF;
  		break;
  	default:
  		ret = -EINVAL;
  	}
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  	return ret;
  }
  
  /**
   *	vt_do_kdskbmeta		-	set keyboard meta state
   *	@console: the console to use
   *	@arg: the requested meta state
   *
   *	Update the keyboard meta bits while holding the correct locks.
   *	Return 0 for success or an error code.
   */
  int vt_do_kdskbmeta(int console, unsigned int arg)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	int ret = 0;
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	switch(arg) {
  	case K_METABIT:
  		clr_vc_kbd_mode(kb, VC_META);
  		break;
  	case K_ESCPREFIX:
  		set_vc_kbd_mode(kb, VC_META);
  		break;
  	default:
  		ret = -EINVAL;
  	}
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  	return ret;
  }
  
  int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
  								int perm)
  {
  	struct kbkeycode tmp;
  	int kc = 0;
  
  	if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
  		return -EFAULT;
  	switch (cmd) {
  	case KDGETKEYCODE:
  		kc = getkeycode(tmp.scancode);
  		if (kc >= 0)
  			kc = put_user(kc, &user_kbkc->keycode);
  		break;
  	case KDSETKEYCODE:
  		if (!perm)
  			return -EPERM;
  		kc = setkeycode(tmp.scancode, tmp.keycode);
  		break;
  	}
  	return kc;
  }
  
  #define i (tmp.kb_index)
  #define s (tmp.kb_table)
  #define v (tmp.kb_value)
  
  int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
  						int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	struct kbentry tmp;
  	ushort *key_map, *new_map, val, ov;
  	unsigned long flags;
  
  	if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
  		return -EFAULT;
  
  	if (!capable(CAP_SYS_TTY_CONFIG))
  		perm = 0;
  
  	switch (cmd) {
  	case KDGKBENT:
  		/* Ensure another thread doesn't free it under us */
  		spin_lock_irqsave(&kbd_event_lock, flags);
  		key_map = key_maps[s];
  		if (key_map) {
  		    val = U(key_map[i]);
  		    if (kb->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
  			val = K_HOLE;
  		} else
  		    val = (i ? K_HOLE : K_NOSUCHMAP);
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  		return put_user(val, &user_kbe->kb_value);
  	case KDSKBENT:
  		if (!perm)
  			return -EPERM;
  		if (!i && v == K_NOSUCHMAP) {
  			spin_lock_irqsave(&kbd_event_lock, flags);
  			/* deallocate map */
  			key_map = key_maps[s];
  			if (s && key_map) {
  			    key_maps[s] = NULL;
  			    if (key_map[0] == U(K_ALLOCATED)) {
  					kfree(key_map);
  					keymap_count--;
  			    }
  			}
  			spin_unlock_irqrestore(&kbd_event_lock, flags);
  			break;
  		}
  
  		if (KTYP(v) < NR_TYPES) {
  		    if (KVAL(v) > max_vals[KTYP(v)])
  				return -EINVAL;
  		} else
  		    if (kb->kbdmode != VC_UNICODE)
  				return -EINVAL;
  
  		/* ++Geert: non-PC keyboards may generate keycode zero */
  #if !defined(__mc68000__) && !defined(__powerpc__)
  		/* assignment to entry 0 only tests validity of args */
  		if (!i)
  			break;
  #endif
  
  		new_map = kmalloc(sizeof(plain_map), GFP_KERNEL);
  		if (!new_map)
  			return -ENOMEM;
  		spin_lock_irqsave(&kbd_event_lock, flags);
  		key_map = key_maps[s];
  		if (key_map == NULL) {
  			int j;
  
  			if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
  			    !capable(CAP_SYS_RESOURCE)) {
  				spin_unlock_irqrestore(&kbd_event_lock, flags);
  				kfree(new_map);
  				return -EPERM;
  			}
  			key_maps[s] = new_map;
  			key_map = new_map;
  			key_map[0] = U(K_ALLOCATED);
  			for (j = 1; j < NR_KEYS; j++)
  				key_map[j] = U(K_HOLE);
  			keymap_count++;
  		} else
  			kfree(new_map);
  
  		ov = U(key_map[i]);
  		if (v == ov)
  			goto out;
  		/*
  		 * Attention Key.
  		 */
  		if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) {
  			spin_unlock_irqrestore(&kbd_event_lock, flags);
  			return -EPERM;
  		}
  		key_map[i] = U(v);
  		if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
  			do_compute_shiftstate();
  out:
  		spin_unlock_irqrestore(&kbd_event_lock, flags);
  		break;
  	}
  	return 0;
  }
  #undef i
  #undef s
  #undef v
  
  /* FIXME: This one needs untangling and locking */
  int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
  {
  	struct kbsentry *kbs;
  	char *p;
  	u_char *q;
  	u_char __user *up;
  	int sz, fnw_sz;
  	int delta;
  	char *first_free, *fj, *fnw;
  	int i, j, k;
  	int ret;
  	unsigned long flags;
  
  	if (!capable(CAP_SYS_TTY_CONFIG))
  		perm = 0;
  
  	kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
  	if (!kbs) {
  		ret = -ENOMEM;
  		goto reterr;
  	}
  
  	/* we mostly copy too much here (512bytes), but who cares ;) */
  	if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
  		ret = -EFAULT;
  		goto reterr;
  	}
  	kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
  	i = kbs->kb_func;
  
  	switch (cmd) {
  	case KDGKBSENT:
  		sz = sizeof(kbs->kb_string) - 1; /* sz should have been
  						  a struct member */
  		up = user_kdgkb->kb_string;
  		p = func_table[i];
  		if(p)
  			for ( ; *p && sz; p++, sz--)
  				if (put_user(*p, up++)) {
  					ret = -EFAULT;
  					goto reterr;
  				}
  		if (put_user('\0', up)) {
  			ret = -EFAULT;
  			goto reterr;
  		}
  		kfree(kbs);
  		return ((p && *p) ? -EOVERFLOW : 0);
  	case KDSKBSENT:
  		if (!perm) {
  			ret = -EPERM;
  			goto reterr;
  		}
  
  		fnw = NULL;
  		fnw_sz = 0;
  		/* race aginst other writers */
  		again:
  		spin_lock_irqsave(&func_buf_lock, flags);
  		q = func_table[i];
  
  		/* fj pointer to next entry after 'q' */
  		first_free = funcbufptr + (funcbufsize - funcbufleft);
  		for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
  			;
  		if (j < MAX_NR_FUNC)
  			fj = func_table[j];
  		else
  			fj = first_free;
  		/* buffer usage increase by new entry */
  		delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
  
  		if (delta <= funcbufleft) { 	/* it fits in current buf */
  		    if (j < MAX_NR_FUNC) {
  			/* make enough space for new entry at 'fj' */
  			memmove(fj + delta, fj, first_free - fj);
  			for (k = j; k < MAX_NR_FUNC; k++)
  			    if (func_table[k])
  				func_table[k] += delta;
  		    }
  		    if (!q)
  		      func_table[i] = fj;
  		    funcbufleft -= delta;
  		} else {			/* allocate a larger buffer */
  		    sz = 256;
  		    while (sz < funcbufsize - funcbufleft + delta)
  		      sz <<= 1;
  		    if (fnw_sz != sz) {
  		      spin_unlock_irqrestore(&func_buf_lock, flags);
  		      kfree(fnw);
  		      fnw = kmalloc(sz, GFP_KERNEL);
  		      fnw_sz = sz;
  		      if (!fnw) {
  			ret = -ENOMEM;
  			goto reterr;
  		      }
  		      goto again;
  		    }
  
  		    if (!q)
  		      func_table[i] = fj;
  		    /* copy data before insertion point to new location */
  		    if (fj > funcbufptr)
  			memmove(fnw, funcbufptr, fj - funcbufptr);
  		    for (k = 0; k < j; k++)
  		      if (func_table[k])
  			func_table[k] = fnw + (func_table[k] - funcbufptr);
  
  		    /* copy data after insertion point to new location */
  		    if (first_free > fj) {
  			memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
  			for (k = j; k < MAX_NR_FUNC; k++)
  			  if (func_table[k])
  			    func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
  		    }
  		    if (funcbufptr != func_buf)
  		      kfree(funcbufptr);
  		    funcbufptr = fnw;
  		    funcbufleft = funcbufleft - delta + sz - funcbufsize;
  		    funcbufsize = sz;
  		}
  		/* finally insert item itself */
  		strcpy(func_table[i], kbs->kb_string);
  		spin_unlock_irqrestore(&func_buf_lock, flags);
  		break;
  	}
  	ret = 0;
  reterr:
  	kfree(kbs);
  	return ret;
  }
  
  int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm)
  {
  	struct kbd_struct *kb = kbd_table + console;
          unsigned long flags;
  	unsigned char ucval;
  
          switch(cmd) {
  	/* the ioctls below read/set the flags usually shown in the leds */
  	/* don't use them - they will go away without warning */
  	case KDGKBLED:
                  spin_lock_irqsave(&kbd_event_lock, flags);
  		ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);
                  spin_unlock_irqrestore(&kbd_event_lock, flags);
  		return put_user(ucval, (char __user *)arg);
  
  	case KDSKBLED:
  		if (!perm)
  			return -EPERM;
  		if (arg & ~0x77)
  			return -EINVAL;
                  spin_lock_irqsave(&led_lock, flags);
  		kb->ledflagstate = (arg & 7);
  		kb->default_ledflagstate = ((arg >> 4) & 7);
  		set_leds();
                  spin_unlock_irqrestore(&led_lock, flags);
  		return 0;
  
  	/* the ioctls below only set the lights, not the functions */
  	/* for those, see KDGKBLED and KDSKBLED above */
  	case KDGETLED:
  		ucval = getledstate();
  		return put_user(ucval, (char __user *)arg);
  
  	case KDSETLED:
  		if (!perm)
  			return -EPERM;
  		setledstate(kb, arg);
  		return 0;
          }
          return -ENOIOCTLCMD;
  }
  
  int vt_do_kdgkbmode(int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	/* This is a spot read so needs no locking */
  	switch (kb->kbdmode) {
  	case VC_RAW:
  		return K_RAW;
  	case VC_MEDIUMRAW:
  		return K_MEDIUMRAW;
  	case VC_UNICODE:
  		return K_UNICODE;
  	case VC_OFF:
  		return K_OFF;
  	default:
  		return K_XLATE;
  	}
  }
  
  /**
   *	vt_do_kdgkbmeta		-	report meta status
   *	@console: console to report
   *
   *	Report the meta flag status of this console
   */
  int vt_do_kdgkbmeta(int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
          /* Again a spot read so no locking */
  	return vc_kbd_mode(kb, VC_META) ? K_ESCPREFIX : K_METABIT;
  }
  
  /**
   *	vt_reset_unicode	-	reset the unicode status
   *	@console: console being reset
   *
   *	Restore the unicode console state to its default
   */
  void vt_reset_unicode(int console)
  {
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	kbd_table[console].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  }
  
  /**
   *	vt_get_shiftstate	-	shift bit state
   *
   *	Report the shift bits from the keyboard state. We have to export
   *	this to support some oddities in the vt layer.
   */
  int vt_get_shift_state(void)
  {
          /* Don't lock as this is a transient report */
          return shift_state;
  }
  
  /**
   *	vt_reset_keyboard	-	reset keyboard state
   *	@console: console to reset
   *
   *	Reset the keyboard bits for a console as part of a general console
   *	reset event
   */
  void vt_reset_keyboard(int console)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	set_vc_kbd_mode(kb, VC_REPEAT);
  	clr_vc_kbd_mode(kb, VC_CKMODE);
  	clr_vc_kbd_mode(kb, VC_APPLIC);
  	clr_vc_kbd_mode(kb, VC_CRLF);
  	kb->lockstate = 0;
  	kb->slockstate = 0;
  	spin_lock(&led_lock);
  	kb->ledmode = LED_SHOW_FLAGS;
  	kb->ledflagstate = kb->default_ledflagstate;
  	spin_unlock(&led_lock);
  	/* do not do set_leds here because this causes an endless tasklet loop
  	   when the keyboard hasn't been initialized yet */
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  }
  
  /**
   *	vt_get_kbd_mode_bit	-	read keyboard status bits
   *	@console: console to read from
   *	@bit: mode bit to read
   *
   *	Report back a vt mode bit. We do this without locking so the
   *	caller must be sure that there are no synchronization needs
   */
  
  int vt_get_kbd_mode_bit(int console, int bit)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	return vc_kbd_mode(kb, bit);
  }
  
  /**
   *	vt_set_kbd_mode_bit	-	read keyboard status bits
   *	@console: console to read from
   *	@bit: mode bit to read
   *
   *	Set a vt mode bit. We do this without locking so the
   *	caller must be sure that there are no synchronization needs
   */
  
  void vt_set_kbd_mode_bit(int console, int bit)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	set_vc_kbd_mode(kb, bit);
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  }
  
  /**
   *	vt_clr_kbd_mode_bit	-	read keyboard status bits
   *	@console: console to read from
   *	@bit: mode bit to read
   *
   *	Report back a vt mode bit. We do this without locking so the
   *	caller must be sure that there are no synchronization needs
   */
  
  void vt_clr_kbd_mode_bit(int console, int bit)
  {
  	struct kbd_struct *kb = kbd_table + console;
  	unsigned long flags;
  
  	spin_lock_irqsave(&kbd_event_lock, flags);
  	clr_vc_kbd_mode(kb, bit);
  	spin_unlock_irqrestore(&kbd_event_lock, flags);
  }
  