v4.19.13 snapshot.
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
new file mode 100644
index 0000000..88312c6
--- /dev/null
+++ b/drivers/tty/vt/keyboard.c
@@ -0,0 +1,2278 @@
+// 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 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, ¶m);
+ if (rc == NOTIFY_STOP || !key_map) {
+ atomic_notifier_call_chain(&keyboard_notifier_list,
+ KBD_UNBOUND_KEYCODE, ¶m);
+ 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, ¶m);
+ 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, ¶m);
+ 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, ¶m);
+
+ 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;
+ int delta;
+ char *first_free, *fj, *fnw;
+ int i, j, k;
+ int ret;
+
+ 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;
+ }
+
+ q = func_table[i];
+ 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;
+
+ delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
+ if (delta <= funcbufleft) { /* it fits in current buf */
+ if (j < MAX_NR_FUNC) {
+ 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;
+ fnw = kmalloc(sz, GFP_KERNEL);
+ if(!fnw) {
+ ret = -ENOMEM;
+ goto reterr;
+ }
+
+ if (!q)
+ func_table[i] = fj;
+ 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);
+
+ 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;
+ }
+ strcpy(func_table[i], kbs->kb_string);
+ 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);
+}