1 // SPDX-License-Identifier: GPL-2.0
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)
117 	255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
118 	NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
119 	255, NR_LOCK - 1, 255, NR_BRL - 1
141 static unsigned int ledstate = -1U;			/* undefined */
180 	d->error = input_get_keycode(handle->dev, &d->ke);  in getkeycode_helper()
182 	return d->error == 0; /* stop as soon as we successfully get one */  in getkeycode_helper()
193 		.error	= -ENODEV,  in getkeycode()
207 	d->error = input_set_keycode(handle->dev, &d->ke);  in setkeycode_helper()
209 	return d->error == 0; /* stop as soon as we successfully set one */  in setkeycode_helper()
220 		.error	= -ENODEV,  in setkeycode()
238 	struct input_dev *dev = handle->dev;  in kd_sound_helper()
240 	if (test_bit(EV_SND, dev->evbit)) {  in kd_sound_helper()
241 		if (test_bit(SND_TONE, dev->sndbit)) {  in kd_sound_helper()
246 		if (test_bit(SND_BELL, dev->sndbit))  in kd_sound_helper()
279 	struct input_dev *dev = handle->dev;  in kbd_rate_helper()
282 	if (test_bit(EV_REP, dev->evbit)) {  in kbd_rate_helper()
291 		rpt[1].delay = dev->rep[REP_DELAY];  in kbd_rate_helper()
292 		rpt[1].period = dev->rep[REP_PERIOD];  in kbd_rate_helper()
313 	tty_insert_flip_char(&vc->port, ch, 0);  in put_queue()
314 	tty_schedule_flip(&vc->port);  in put_queue()
320 		tty_insert_flip_char(&vc->port, *cp, 0);  in puts_queue()
323 	tty_schedule_flip(&vc->port);  in puts_queue()
337  * they produce ASCII, or they produce some user-assigned
339  * in utf-8 already.
369  * Called after returning from RAW mode or when changing consoles - recompute
396 /* We still have to export this method to vt.c */
431 	if (kbd->kbdmode == VC_UNICODE)  in handle_diacr()
435 		if (c != -1)  in handle_diacr()
448 		if (kbd->kbdmode == VC_UNICODE)  in fn_enter()
452 			if (c != -1)  in fn_enter()
489 	struct tty_struct *tty = vc->port.tty;  in fn_hold()
499 	if (tty->stopped)  in fn_hold()
514  * Bind this to Shift-NumLock if you work in application keypad mode
536 	if (want_console != -1)  in fn_dec_console()
539 	for (i = cur - 1; i != cur; i--) {  in fn_dec_console()
540 		if (i == -1)  in fn_dec_console()
541 			i = MAX_NR_CONSOLES - 1;  in fn_dec_console()
553 	if (want_console != -1)  in fn_inc_console()
567 	tty_insert_flip_char(&vc->port, 0, TTY_BREAK);  in fn_send_intr()
568 	tty_schedule_flip(&vc->port);  in fn_send_intr()
636 	if ((kbd->kbdmode == VC_RAW ||  in k_spec()
637 	     kbd->kbdmode == VC_MEDIUMRAW ||  in k_spec()
638 	     kbd->kbdmode == VC_OFF) &&  in k_spec()
646 	pr_err("k_lowercase was called - impossible\n");  in k_lowercase()
662 	if (kbd->kbdmode == VC_UNICODE)  in k_unicode()
666 		if (c != -1)  in k_unicode()
695  * Obsolete - for backwards compatibility only
719 		'-',	/* dead_stroke */  in k_dead()
769 	static const char pad_chars[] = "0123456789+-*/\015,.?()#";  in k_pad()
848 			shift_down[value]--;  in k_shift()
859 		if (kbd->kbdmode == VC_UNICODE)  in k_shift()
891 		value -= 10;  in k_ascii()
919 	if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {  in k_slock()
920 		kbd->slockstate = 0;  in k_slock()
957 	if (kbd->kbdmode != VC_UNICODE) {  in k_brl()
972 		pressed |= 1 << (value - 1);  in k_brl()
982 		pressed &= ~(1 << (value - 1));  in k_brl()
992 		pressed &= ~(1 << (value - 1));  in k_brl()
1006 		container_of(cdev->trigger, struct kbd_led_trigger, trigger);  in kbd_led_trigger_activate()
1009 	if (ledstate != -1U)  in kbd_led_trigger_activate()
1010 		led_trigger_event(&trigger->trigger,  in kbd_led_trigger_activate()
1011 				  ledstate & trigger->mask ?  in kbd_led_trigger_activate()
1030 	KBD_LED_TRIGGER(VC_SCROLLOCK, "kbd-scrolllock"),
1031 	KBD_LED_TRIGGER(VC_NUMLOCK,   "kbd-numlock"),
1032 	KBD_LED_TRIGGER(VC_CAPSLOCK,  "kbd-capslock"),
1033 	KBD_LED_TRIGGER(VC_KANALOCK,  "kbd-kanalock"),
1035 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLOCK,  "kbd-shiftlock"),
1036 	KBD_LOCKSTATE_TRIGGER(VC_ALTGRLOCK,  "kbd-altgrlock"),
1037 	KBD_LOCKSTATE_TRIGGER(VC_CTRLLOCK,   "kbd-ctrllock"),
1038 	KBD_LOCKSTATE_TRIGGER(VC_ALTLOCK,    "kbd-altlock"),
1039 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTLLOCK, "kbd-shiftllock"),
1040 	KBD_LOCKSTATE_TRIGGER(VC_SHIFTRLOCK, "kbd-shiftrlock"),
1041 	KBD_LOCKSTATE_TRIGGER(VC_CTRLLLOCK,  "kbd-ctrlllock"),
1042 	KBD_LOCKSTATE_TRIGGER(VC_CTRLRLOCK,  "kbd-ctrlrlock"),
1055 		if (changed & trigger->mask)  in kbd_propagate_led_state()
1056 			led_trigger_event(&trigger->trigger,  in kbd_propagate_led_state()
1057 					  new_state & trigger->mask ?  in kbd_propagate_led_state()
1066 	if (test_bit(EV_LED, handle->dev->evbit))  in kbd_update_leds_helper()
1091 	if (test_bit(EV_LED, handle->dev->evbit)) {  in kbd_update_leds_helper()
1130 		kb->ledmode = LED_SHOW_IOCTL;  in setledstate()
1132 		kb->ledmode = LED_SHOW_FLAGS;  in setledstate()
1142 	if (kb->ledmode == LED_SHOW_IOCTL)  in getleds()
1145 	return kb->ledflagstate;  in getleds()
1149  *	vt_get_leds	-	helper for braille console
1170  *	vt_set_led_state	-	set LED state of a console
1174  *	Set the LEDs on a console. This is a wrapper for the VT layer
1184  *	vt_kbd_con_start	-	Keyboard side of console start
1187  *	Handle console start. This is a wrapper for the VT layer
1194  *	but not during an -rc release!
1207  *	vt_kbd_con_stop		-	Keyboard side of console stop
1210  *	Handle console stop. This is a wrapper for the VT layer
1224  * This is the tasklet that updates LED state of LEDs using standard
1227  * but we already getting updates from the VT to update led state.
1236 	leds |= (unsigned int)kbd->lockstate << 8;  in kbd_bh()
1252 #define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
1253 …	((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
1320 			return -1;  in emulate_raw()
1324 			return -1;  in emulate_raw()
1343 		return -1;  in emulate_raw()
1354 	kbd = kbd_table + vc->vc_num;  in kbd_rawcode()
1355 	if (kbd->kbdmode == VC_RAW)  in kbd_rawcode()
1370 	tty = vc->port.tty;  in kbd_keycode()
1372 	if (tty && (!tty->driver_data)) {  in kbd_keycode()
1374 		tty->driver_data = vc;  in kbd_keycode()
1377 	kbd = kbd_table + vc->vc_num;  in kbd_keycode()
1386 	raw_mode = (kbd->kbdmode == VC_RAW);  in kbd_keycode()
1400 	if (kbd->kbdmode == VC_MEDIUMRAW) {  in kbd_keycode()
1436 	param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;  in kbd_keycode()
1437 	param.ledstate = kbd->ledflagstate;  in kbd_keycode()
1446 		kbd->slockstate = 0;  in kbd_keycode()
1453 		keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));  in kbd_keycode()
1469 	type -= 0xf0;  in kbd_keycode()
1486 	if ((raw_mode || kbd->kbdmode == VC_OFF) && type != KT_SPEC && type != KT_SHIFT)  in kbd_keycode()
1491 	param.ledstate = kbd->ledflagstate;  in kbd_keycode()
1495 		kbd->slockstate = 0;  in kbd_keycode()
1504 	if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))  in kbd_event()
1507 		kbd_keycode(event_code, value, HW_RAW(handle->dev));  in kbd_event()
1520 	if (test_bit(EV_SND, dev->evbit))  in kbd_match()
1523 	if (test_bit(EV_KEY, dev->evbit)) {  in kbd_match()
1525 			if (test_bit(i, dev->keybit))  in kbd_match()
1528 			if (test_bit(i, dev->keybit))  in kbd_match()
1539  * function, we should decide which VT to bind that keyboard to initially.
1549 		return -ENOMEM;  in kbd_connect()
1551 	handle->dev = dev;  in kbd_connect()
1552 	handle->handler = handler;  in kbd_connect()
1553 	handle->name = "kbd";  in kbd_connect()
1587 	if (ledstate != -1U)  in kbd_start()
1649  *	vt_do_diacrit		-	diacritical table updates
1673 			return -ENOMEM;  in vt_do_diacrit()
1690 		if (put_user(asize, &a->kb_cnt))  in vt_do_diacrit()
1691 			ret = -EFAULT;  in vt_do_diacrit()
1692 		else  if (copy_to_user(a->kbdiacr, dia,  in vt_do_diacrit()
1694 			ret = -EFAULT;  in vt_do_diacrit()
1706 			return -ENOMEM;  in vt_do_diacrit()
1717 		if (put_user(asize, &a->kb_cnt))  in vt_do_diacrit()
1718 			ret = -EFAULT;  in vt_do_diacrit()
1719 		else if (copy_to_user(a->kbdiacruc, buf,  in vt_do_diacrit()
1721 			ret = -EFAULT;  in vt_do_diacrit()
1734 			return -EPERM;  in vt_do_diacrit()
1735 		if (get_user(ct, &a->kb_cnt))  in vt_do_diacrit()
1736 			return -EFAULT;  in vt_do_diacrit()
1738 			return -EINVAL;  in vt_do_diacrit()
1742 			dia = memdup_user(a->kbdiacr,  in vt_do_diacrit()
1771 			return -EPERM;  in vt_do_diacrit()
1773 		if (get_user(ct, &a->kb_cnt))  in vt_do_diacrit()
1774 			return -EFAULT;  in vt_do_diacrit()
1777 			return -EINVAL;  in vt_do_diacrit()
1780 			buf = memdup_user(a->kbdiacruc,  in vt_do_diacrit()
1799  *	vt_do_kdskbmode		-	set keyboard mode ioctl
1815 		kb->kbdmode = VC_RAW;  in vt_do_kdskbmode()
1818 		kb->kbdmode = VC_MEDIUMRAW;  in vt_do_kdskbmode()
1821 		kb->kbdmode = VC_XLATE;  in vt_do_kdskbmode()
1825 		kb->kbdmode = VC_UNICODE;  in vt_do_kdskbmode()
1829 		kb->kbdmode = VC_OFF;  in vt_do_kdskbmode()
1832 		ret = -EINVAL;  in vt_do_kdskbmode()
1839  *	vt_do_kdskbmeta		-	set keyboard meta state
1861 		ret = -EINVAL;  in vt_do_kdskbmeta()
1874 		return -EFAULT;  in vt_do_kbkeycode_ioctl()
1879 			kc = put_user(kc, &user_kbkc->keycode);  in vt_do_kbkeycode_ioctl()
1883 			return -EPERM;  in vt_do_kbkeycode_ioctl()
1903 		return -EFAULT;  in vt_do_kdsk_ioctl()
1915 		    if (kb->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)  in vt_do_kdsk_ioctl()
1920 		return put_user(val, &user_kbe->kb_value);  in vt_do_kdsk_ioctl()
1923 			return -EPERM;  in vt_do_kdsk_ioctl()
1932 					keymap_count--;  in vt_do_kdsk_ioctl()
1941 				return -EINVAL;  in vt_do_kdsk_ioctl()
1943 		    if (kb->kbdmode != VC_UNICODE)  in vt_do_kdsk_ioctl()
1944 				return -EINVAL;  in vt_do_kdsk_ioctl()
1946 		/* ++Geert: non-PC keyboards may generate keycode zero */  in vt_do_kdsk_ioctl()
1955 			return -ENOMEM;  in vt_do_kdsk_ioctl()
1965 				return -EPERM;  in vt_do_kdsk_ioctl()
1984 			return -EPERM;  in vt_do_kdsk_ioctl()
2016 		ret = -ENOMEM;  in vt_do_kdgkb_ioctl()
2022 		ret = -EFAULT;  in vt_do_kdgkb_ioctl()
2025 	kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';  in vt_do_kdgkb_ioctl()
2026 	i = array_index_nospec(kbs->kb_func, MAX_NR_FUNC);  in vt_do_kdgkb_ioctl()
2031 		ssize_t len = sizeof(user_kdgkb->kb_string);  in vt_do_kdgkb_ioctl()
2034 		len = strlcpy(kbs->kb_string, func_table[i] ? : "", len);  in vt_do_kdgkb_ioctl()
2037 		ret = copy_to_user(user_kdgkb->kb_string, kbs->kb_string,  in vt_do_kdgkb_ioctl()
2038 				len + 1) ? -EFAULT : 0;  in vt_do_kdgkb_ioctl()
2044 			ret = -EPERM;  in vt_do_kdgkb_ioctl()
2056 		first_free = funcbufptr + (funcbufsize - funcbufleft);  in vt_do_kdgkb_ioctl()
2064 		delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);  in vt_do_kdgkb_ioctl()
2069 			memmove(fj + delta, fj, first_free - fj);  in vt_do_kdgkb_ioctl()
2076 		    funcbufleft -= delta;  in vt_do_kdgkb_ioctl()
2079 		    while (sz < funcbufsize - funcbufleft + delta)  in vt_do_kdgkb_ioctl()
2087 			ret = -ENOMEM;  in vt_do_kdgkb_ioctl()
2097 			memmove(fnw, funcbufptr, fj - funcbufptr);  in vt_do_kdgkb_ioctl()
2100 			func_table[k] = fnw + (func_table[k] - funcbufptr);  in vt_do_kdgkb_ioctl()
2104 			memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);  in vt_do_kdgkb_ioctl()
2107 			    func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;  in vt_do_kdgkb_ioctl()
2112 		    funcbufleft = funcbufleft - delta + sz - funcbufsize;  in vt_do_kdgkb_ioctl()
2116 		strcpy(func_table[i], kbs->kb_string);  in vt_do_kdgkb_ioctl()
2134 	/* don't use them - they will go away without warning */  in vt_do_kdskled()
2137 		ucval = kb->ledflagstate | (kb->default_ledflagstate << 4);  in vt_do_kdskled()
2143 			return -EPERM;  in vt_do_kdskled()
2145 			return -EINVAL;  in vt_do_kdskled()
2147 		kb->ledflagstate = (arg & 7);  in vt_do_kdskled()
2148 		kb->default_ledflagstate = ((arg >> 4) & 7);  in vt_do_kdskled()
2161 			return -EPERM;  in vt_do_kdskled()
2165         return -ENOIOCTLCMD;  in vt_do_kdskled()
2172 	switch (kb->kbdmode) {  in vt_do_kdgkbmode()
2187  *	vt_do_kdgkbmeta		-	report meta status
2200  *	vt_reset_unicode	-	reset the unicode status
2215  *	vt_get_shiftstate	-	shift bit state
2218  *	this to support some oddities in the vt layer.
2227  *	vt_reset_keyboard	-	reset keyboard state
2243 	kb->lockstate = 0;  in vt_reset_keyboard()
2244 	kb->slockstate = 0;  in vt_reset_keyboard()
2246 	kb->ledmode = LED_SHOW_FLAGS;  in vt_reset_keyboard()
2247 	kb->ledflagstate = kb->default_ledflagstate;  in vt_reset_keyboard()
2255  *	vt_get_kbd_mode_bit	-	read keyboard status bits
2259  *	Report back a vt mode bit. We do this without locking so the
2270  *	vt_set_kbd_mode_bit	-	read keyboard status bits
2274  *	Set a vt mode bit. We do this without locking so the
2289  *	vt_clr_kbd_mode_bit	-	read keyboard status bits
2293  *	Report back a vt mode bit. We do this without locking so the