1 // SPDX-License-Identifier: GPL-2.0
12  * dynamic function/string keys, led setting,  Sept 1994
15  * 11-11-96: SAK should now work in the raw mode (Martin Mares)
18  * Merge with the m68k keyboard driver and split-off of the PC low-level
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)
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,
154 static unsigned int ledstate = -1U;			/* undefined */
194 	d->error = input_get_keycode(handle->dev, &d->ke);  in getkeycode_helper()
196 	return d->error == 0; /* stop as soon as we successfully get one */  in getkeycode_helper()
207 		.error	= -ENODEV,  in getkeycode()
221 	d->error = input_set_keycode(handle->dev, &d->ke);  in setkeycode_helper()
223 	return d->error == 0; /* stop as soon as we successfully set one */  in setkeycode_helper()
234 		.error	= -ENODEV,  in setkeycode()
252 	struct input_dev *dev = handle->dev;  in kd_sound_helper()
254 	if (test_bit(EV_SND, dev->evbit)) {  in kd_sound_helper()
255 		if (test_bit(SND_TONE, dev->sndbit)) {  in kd_sound_helper()
260 		if (test_bit(SND_BELL, dev->sndbit))  in kd_sound_helper()
293 	struct input_dev *dev = handle->dev;  in kbd_rate_helper()
296 	if (test_bit(EV_REP, dev->evbit)) {  in kbd_rate_helper()
305 		rpt[1].delay = dev->rep[REP_DELAY];  in kbd_rate_helper()
306 		rpt[1].period = dev->rep[REP_PERIOD];  in kbd_rate_helper()
327 	tty_insert_flip_char(&vc->port, ch, 0);  in put_queue()
328 	tty_flip_buffer_push(&vc->port);  in put_queue()
333 	tty_insert_flip_string(&vc->port, cp, strlen(cp));  in puts_queue()
334 	tty_flip_buffer_push(&vc->port);  in puts_queue()
348  * they produce ASCII, or they produce some user-assigned
350  * in utf-8 already.
386  * Called after returning from RAW mode or when changing consoles - recompute
419 	 * When VT is switched, the keyboard led needs to be set once.  in vt_set_leds_compute_shiftstate()
421 	 * keyboard LED is consistent with the state of the keyboard lock.  in vt_set_leds_compute_shiftstate()
457 	if (kbd->kbdmode == VC_UNICODE)  in handle_diacr()
461 		if (c != -1)  in handle_diacr()
474 		if (kbd->kbdmode == VC_UNICODE)  in fn_enter()
478 			if (c != -1)  in fn_enter()
515 	struct tty_struct *tty = vc->port.tty;  in fn_hold()
525 	if (tty->flow.stopped)  in fn_hold()
540  * Bind this to Shift-NumLock if you work in application keypad mode
559 	int i, cur = fg_console;  in fn_dec_console()  local
562 	if (want_console != -1)  in fn_dec_console()
563 		cur = want_console;  in fn_dec_console()
565 	for (i = cur - 1; i != cur; i--) {  in fn_dec_console()
566 		if (i == -1)  in fn_dec_console()
567 			i = MAX_NR_CONSOLES - 1;  in fn_dec_console()
576 	int i, cur = fg_console;  in fn_inc_console()  local
579 	if (want_console != -1)  in fn_inc_console()
580 		cur = want_console;  in fn_inc_console()
582 	for (i = cur+1; i != cur; i++) {  in fn_inc_console()
593 	tty_insert_flip_char(&vc->port, 0, TTY_BREAK);  in fn_send_intr()
594 	tty_flip_buffer_push(&vc->port);  in fn_send_intr()
662 	if ((kbd->kbdmode == VC_RAW ||  in k_spec()
663 	     kbd->kbdmode == VC_MEDIUMRAW ||  in k_spec()
664 	     kbd->kbdmode == VC_OFF) &&  in k_spec()
672 	pr_err("k_lowercase was called - impossible\n");  in k_lowercase()
688 	if (kbd->kbdmode == VC_UNICODE)  in k_unicode()
692 		if (c != -1)  in k_unicode()
721  * Obsolete - for backwards compatibility only
745 		'-',	/* dead_stroke */  in k_dead()
795 	static const char pad_chars[] = "0123456789+-*/\015,.?()#";  in k_pad()
874 			shift_down[value]--;  in k_shift()
885 		if (kbd->kbdmode == VC_UNICODE)  in k_shift()
917 		value -= 10;  in k_ascii()
945 	if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {  in k_slock()
946 		kbd->slockstate = 0;  in k_slock()
983 	if (kbd->kbdmode != VC_UNICODE) {  in k_brl()
998 		pressed |= BIT(value - 1);  in k_brl()
1008 		pressed &= ~BIT(value - 1);  in k_brl()
1018 		pressed &= ~BIT(value - 1);  in k_brl()
1032 		container_of(cdev->trigger, struct kbd_led_trigger, trigger);  in kbd_led_trigger_activate()
1035 	if (ledstate != -1U)  in kbd_led_trigger_activate()
1036 		led_trigger_event(&trigger->trigger,  in kbd_led_trigger_activate()
1037 				  ledstate & trigger->mask ?  in kbd_led_trigger_activate()
1056 	KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
1057 	KBD_LED_TRIGGER(VC_NUMLOCK,   "kbd-numlock"),
1058 	KBD_LED_TRIGGER(VC_CAPSLOCK,  "kbd-capslock"),
1059 	KBD_LED_TRIGGER(VC_KANALOCK,  "kbd-kanalock"),
1061 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK,  "kbd-shiftlock"),
1062 	KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK,  "kbd-altgrlock"),
1063 	KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK,   "kbd-ctrllock"),
1064 	KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK,    "kbd-altlock"),
1065 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
1066 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
1067 	KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK,  "kbd-ctrlllock"),
1068 	KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK,  "kbd-ctrlrlock"),
1081 		if (changed & trigger->mask)  in kbd_propagate_led_state()
1082 			led_trigger_event(&trigger->trigger,  in kbd_propagate_led_state()
1083 					  new_state & trigger->mask ?  in kbd_propagate_led_state()
1092 	if (test_bit(EV_LED, handle->dev->evbit))  in kbd_update_leds_helper()
1117 	if (test_bit(EV_LED, handle->dev->evbit)) {  in kbd_update_leds_helper()
1150 void setledstate(struct kbd_struct *kb, unsigned int led)  in setledstate()  argument
1154 	if (!(led & ~7)) {  in setledstate()
1155 		ledioctl = led;  in setledstate()
1156 		kb->ledmode = LED_SHOW_IOCTL;  in setledstate()
1158 		kb->ledmode = LED_SHOW_FLAGS;  in setledstate()
1168 	if (kb->ledmode == LED_SHOW_IOCTL)  in getleds()
1171 	return kb->ledflagstate;  in getleds()
1175  *	vt_get_leds	-	helper for braille console
1179  *	Check the status of a keyboard led flag and report it back
1196  *	vt_set_led_state	-	set LED state of a console
1198  *	@leds: LED bits
1210  *	vt_kbd_con_start	-	Keyboard side of console start
1217  *	the LED updating. We can't do it yet because fn_hold calls stop_tty
1219  *	don't hold the lock. We probably need to split out an LED lock
1220  *	but not during an -rc release!
1233  *	vt_kbd_con_stop		-	Keyboard side of console stop
1250  * This is the tasklet that updates LED state of LEDs using standard
1253  * but we already getting updates from the VT to update led state.
1262 	leds |= (unsigned int)kbd->lockstate << 8;  in kbd_bh()
1283 	if (!test_bit(EV_MSC, dev->evbit) || !test_bit(MSC_RAW, dev->mscbit))  in kbd_is_hw_raw()
1286 	return dev->id.bustype == BUS_I8042 &&  in kbd_is_hw_raw()
1287 		dev->id.vendor == 0x0001 && dev->id.product == 0x0001;  in kbd_is_hw_raw()
1355 			return -1;  in emulate_raw()
1359 			return -1;  in emulate_raw()
1381 		return -1;  in emulate_raw()
1392 	kbd = &kbd_table[vc->vc_num];  in kbd_rawcode()
1393 	if (kbd->kbdmode == VC_RAW)  in kbd_rawcode()
1408 	tty = vc->port.tty;  in kbd_keycode()
1410 	if (tty && (!tty->driver_data)) {  in kbd_keycode()
1412 		tty->driver_data = vc;  in kbd_keycode()
1415 	kbd = &kbd_table[vc->vc_num];  in kbd_keycode()
1424 	raw_mode = (kbd->kbdmode == VC_RAW);  in kbd_keycode()
1438 	if (kbd->kbdmode == VC_MEDIUMRAW) {  in kbd_keycode()
1471 	param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;  in kbd_keycode()
1472 	param.ledstate = kbd->ledflagstate;  in kbd_keycode()
1481 		kbd->slockstate = 0;  in kbd_keycode()
1488 		keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));  in kbd_keycode()
1504 	type -= 0xf0;  in kbd_keycode()
1521 	if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)  in kbd_keycode()
1526 	param.ledstate = kbd->ledflagstate;  in kbd_keycode()
1530 		kbd->slockstate = 0;  in kbd_keycode()
1540 			kbd_is_hw_raw(handle->dev))  in kbd_event()
1543 		kbd_keycode(event_code, value, kbd_is_hw_raw(handle->dev));  in kbd_event()
1554 	if (test_bit(EV_SND, dev->evbit))  in kbd_match()
1557 	if (test_bit(EV_KEY, dev->evbit)) {  in kbd_match()
1558 		if (find_next_bit(dev->keybit, BTN_MISC, KEY_RESERVED) <  in kbd_match()
1561 		if (find_next_bit(dev->keybit, KEY_BRL_DOT10 + 1,  in kbd_match()
1583 		return -ENOMEM;  in kbd_connect()
1585 	handle->dev = dev;  in kbd_connect()
1586 	handle->handler = handler;  in kbd_connect()
1587 	handle->name = "kbd";  in kbd_connect()
1614  * Start keyboard handler on the new keyboard by refreshing LED state to
1621 	if (ledstate != -1U)  in kbd_start()
1683  *	vt_do_diacrit		-	diacritical table updates
1707 			return -ENOMEM;  in vt_do_diacrit()
1724 		if (put_user(asize, &a->kb_cnt))  in vt_do_diacrit()
1725 			ret = -EFAULT;  in vt_do_diacrit()
1726 		else  if (copy_to_user(a->kbdiacr, dia,  in vt_do_diacrit()
1728 			ret = -EFAULT;  in vt_do_diacrit()
1740 			return -ENOMEM;  in vt_do_diacrit()
1751 		if (put_user(asize, &a->kb_cnt))  in vt_do_diacrit()
1752 			ret = -EFAULT;  in vt_do_diacrit()
1753 		else if (copy_to_user(a->kbdiacruc, buf,  in vt_do_diacrit()
1755 			ret = -EFAULT;  in vt_do_diacrit()
1768 			return -EPERM;  in vt_do_diacrit()
1769 		if (get_user(ct, &a->kb_cnt))  in vt_do_diacrit()
1770 			return -EFAULT;  in vt_do_diacrit()
1772 			return -EINVAL;  in vt_do_diacrit()
1776 			dia = memdup_user(a->kbdiacr,  in vt_do_diacrit()
1805 			return -EPERM;  in vt_do_diacrit()
1807 		if (get_user(ct, &a->kb_cnt))  in vt_do_diacrit()
1808 			return -EFAULT;  in vt_do_diacrit()
1811 			return -EINVAL;  in vt_do_diacrit()
1814 			buf = memdup_user(a->kbdiacruc,  in vt_do_diacrit()
1833  *	vt_do_kdskbmode		-	set keyboard mode ioctl
1849 		kb->kbdmode = VC_RAW;  in vt_do_kdskbmode()
1852 		kb->kbdmode = VC_MEDIUMRAW;  in vt_do_kdskbmode()
1855 		kb->kbdmode = VC_XLATE;  in vt_do_kdskbmode()
1859 		kb->kbdmode = VC_UNICODE;  in vt_do_kdskbmode()
1863 		kb->kbdmode = VC_OFF;  in vt_do_kdskbmode()
1866 		ret = -EINVAL;  in vt_do_kdskbmode()
1873  *	vt_do_kdskbmeta		-	set keyboard meta state
1895 		ret = -EINVAL;  in vt_do_kdskbmeta()
1908 		return -EFAULT;  in vt_do_kbkeycode_ioctl()
1913 			kc = put_user(kc, &user_kbkc->keycode);  in vt_do_kbkeycode_ioctl()
1917 			return -EPERM;  in vt_do_kbkeycode_ioctl()
1958 				keymap_count--;  in vt_kdskbent()
1968 			return -EINVAL;  in vt_kdskbent()
1970 		return -EINVAL;  in vt_kdskbent()
1972 	/* ++Geert: non-PC keyboards may generate keycode zero */  in vt_kdskbent()
1981 		return -ENOMEM;  in vt_kdskbent()
1992 			return -EPERM;  in vt_kdskbent()
2010 		return -EPERM;  in vt_kdskbent()
2029 		return -EFAULT;  in vt_do_kdsk_ioctl()
2033 		return put_user(vt_kdgkbent(kb->kbdmode, kbe.kb_index,  in vt_do_kdsk_ioctl()
2035 				&user_kbe->kb_value);  in vt_do_kdsk_ioctl()
2038 			return -EPERM;  in vt_do_kdsk_ioctl()
2039 		return vt_kdskbent(kb->kbdmode, kbe.kb_index, kbe.kb_table,  in vt_do_kdsk_ioctl()
2045 static char *vt_kdskbsent(char *kbs, unsigned char cur)  in vt_kdskbsent()  argument
2048 	char *cur_f = func_table[cur];  in vt_kdskbsent()
2055 	func_table[cur] = kbs;  in vt_kdskbsent()
2057 	return __test_and_set_bit(cur, is_kmalloc) ? cur_f : NULL;  in vt_kdskbsent()
2067 	if (get_user(kb_func, &user_kdgkb->kb_func))  in vt_do_kdgkb_ioctl()
2068 		return -EFAULT;  in vt_do_kdgkb_ioctl()
2075 		ssize_t len = sizeof(user_kdgkb->kb_string);  in vt_do_kdgkb_ioctl()
2079 			return -ENOMEM;  in vt_do_kdgkb_ioctl()
2085 		ret = copy_to_user(user_kdgkb->kb_string, kbs, len + 1) ?  in vt_do_kdgkb_ioctl()
2086 			-EFAULT : 0;  in vt_do_kdgkb_ioctl()
2092 			return -EPERM;  in vt_do_kdgkb_ioctl()
2094 		kbs = strndup_user(user_kdgkb->kb_string,  in vt_do_kdgkb_ioctl()
2095 				sizeof(user_kdgkb->kb_string));  in vt_do_kdgkb_ioctl()
2120 	/* don't use them - they will go away without warning */  in vt_do_kdskled()
2123 		ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);  in vt_do_kdskled()
2129 			return -EPERM;  in vt_do_kdskled()
2131 			return -EINVAL;  in vt_do_kdskled()
2133 		kb->ledflagstate = (arg & 7);  in vt_do_kdskled()
2134 		kb->default_ledflagstate = ((arg >> 4) & 7);  in vt_do_kdskled()
2147 			return -EPERM;  in vt_do_kdskled()
2151         return -ENOIOCTLCMD;  in vt_do_kdskled()
2158 	switch (kb->kbdmode) {  in vt_do_kdgkbmode()
2173  *	vt_do_kdgkbmeta		-	report meta status
2186  *	vt_reset_unicode	-	reset the unicode status
2201  *	vt_get_shift_state	-	shift bit state
2213  *	vt_reset_keyboard	-	reset keyboard state
2229 	kb->lockstate = 0;  in vt_reset_keyboard()
2230 	kb->slockstate = 0;  in vt_reset_keyboard()
2232 	kb->ledmode = LED_SHOW_FLAGS;  in vt_reset_keyboard()
2233 	kb->ledflagstate = kb->default_ledflagstate;  in vt_reset_keyboard()
2241  *	vt_get_kbd_mode_bit	-	read keyboard status bits
2256  *	vt_set_kbd_mode_bit	-	read keyboard status bits
2275  *	vt_clr_kbd_mode_bit	-	read keyboard status bits