diff options
Diffstat (limited to 'drivers/tty/vt/keyboard.c')
| -rw-r--r-- | drivers/tty/vt/keyboard.c | 2291 |
1 files changed, 2291 insertions, 0 deletions
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c new file mode 100644 index 0000000000..358f216c6c --- /dev/null +++ b/drivers/tty/vt/keyboard.c @@ -0,0 +1,2291 @@ +// 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/init.h> +#include <linux/input.h> +#include <linux/jiffies.h> +#include <linux/kbd_diacr.h> +#include <linux/kbd_kern.h> +#include <linux/leds.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/nospec.h> +#include <linux/notifier.h> +#include <linux/reboot.h> +#include <linux/sched/debug.h> +#include <linux/sched/signal.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/string.h> +#include <linux/tty_flip.h> +#include <linux/tty.h> +#include <linux/uaccess.h> +#include <linux/vt_kern.h> + +#include <asm/irq_regs.h> + +/* + * Exported functions/variables + */ + +#define KBD_DEFMODE (BIT(VC_REPEAT) | BIT(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 unsigned char max_vals[] = { + [ KT_LATIN ] = 255, + [ KT_FN ] = ARRAY_SIZE(func_table) - 1, + [ KT_SPEC ] = ARRAY_SIZE(fn_handler) - 1, + [ KT_PAD ] = NR_PAD - 1, + [ KT_DEAD ] = NR_DEAD - 1, + [ KT_CONS ] = 255, + [ KT_CUR ] = 3, + [ KT_SHIFT ] = NR_SHIFT - 1, + [ KT_META ] = 255, + [ KT_ASCII ] = NR_ASCII - 1, + [ KT_LOCK ] = NR_LOCK - 1, + [ KT_LETTER ] = 255, + [ KT_SLOCK ] = NR_LOCK - 1, + [ KT_DEAD2 ] = 255, + [ KT_BRL ] = NR_BRL - 1, +}; + +static const int NR_TYPES = ARRAY_SIZE(max_vals); + +static void kbd_bh(struct tasklet_struct *unused); +static DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh); + +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 DECLARE_BITMAP(key_down, KEY_CNT); /* keyboard key bitmap */ +static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */ +static bool dead_key_next; + +/* Handles a number being assembled on the number pad */ +static bool npadch_active; +static unsigned int npadch_value; + +static unsigned int diacr; +static bool rep; /* flag telling character repeat */ + +static int shift_state = 0; + +static unsigned int ledstate = -1U; /* undefined */ +static unsigned char ledioctl; +static bool vt_switch; + +/* + * 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_flip_buffer_push(&vc->port); +} + +static void puts_queue(struct vc_data *vc, const char *cp) +{ + tty_insert_flip_string(&vc->port, cp, strlen(cp)); + tty_flip_buffer_push(&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)); + } +} + +/* FIXME: review locking for vt.c callers */ +static void set_leds(void) +{ + tasklet_schedule(&keyboard_tasklet); +} + +/* + * 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 vt_set_leds_compute_shiftstate(void) +{ + unsigned long flags; + + /* + * When VT is switched, the keyboard led needs to be set once. + * Ensure that after the switch is completed, the state of the + * keyboard LED is consistent with the state of the keyboard lock. + */ + vt_switch = true; + set_leds(); + + 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, '\r'); + if (vc_kbd_mode(kbd, VC_CRLF)) + put_queue(vc, '\n'); +} + +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->flow.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_flip_buffer_push(&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(); +} + +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)) { + unsigned long flags; + + spin_lock_irqsave(&func_buf_lock, flags); + if (func_table[value]) + puts_queue(vc, func_table[value]); + spin_unlock_irqrestore(&func_buf_lock, flags); + + } 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, '\n'); +} + +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 |= BIT(value); + else + shift_state &= ~BIT(value); + + /* kludge */ + if (up_flag && shift_state != old_state && npadch_active) { + if (kbd->kbdmode == VC_UNICODE) + to_utf8(vc, npadch_value); + else + put_queue(vc, npadch_value & 0xff); + npadch_active = false; + } +} + +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 | BIT(7)); +} + +static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag) +{ + unsigned 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_active) { + npadch_value = 0; + npadch_active = true; + } + + npadch_value = npadch_value * 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 |= BIT(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 &= ~BIT(value - 1); + if (!pressed && committing) { + k_brlcommit(vc, committing, 0); + committing = 0; + } + } else { + if (committing) { + k_brlcommit(vc, committing, 0); + committing = 0; + } + pressed &= ~BIT(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 & BIT(0))); + input_inject_event(handle, EV_LED, LED_NUML, !!(leds & BIT(1))); + input_inject_event(handle, EV_LED, LED_CAPSL, !!(leds & BIT(2))); + 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(unsigned 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(unsigned 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(unsigned 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(unsigned 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(struct tasklet_struct *unused) +{ + 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 (vt_switch) { + ledstate = ~leds; + vt_switch = false; + } + + if (leds != ledstate) { + kbd_propagate_led_state(ledstate, leds); + ledstate = leds; + } +} + +#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)) + +static inline bool kbd_is_hw_raw(const struct input_dev *dev) +{ + if (!test_bit(EV_MSC, dev->evbit) || !test_bit(MSC_RAW, dev->mscbit)) + return false; + + return 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 + +static inline bool kbd_is_hw_raw(const struct input_dev *dev) +{ + return false; +} + +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, bool 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) | BIT(7)); + put_queue(vc, keycode | BIT(7)); + } + raw_mode = true; + } + + assign_bit(keycode, key_down, 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) + k_unicode(vc, keysym, !down); + return; + } + + type -= 0xf0; + + if (type == KT_LETTER) { + type = KT_LATIN; + if (vc_kbd_led(kbd, VC_CAPSLOCK)) { + key_map = key_maps[shift_final ^ BIT(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 && + kbd_is_hw_raw(handle->dev)) + kbd_rawcode(value); + if (event_type == EV_KEY && event_code <= KEY_MAX) + kbd_keycode(event_code, value, kbd_is_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) +{ + if (test_bit(EV_SND, dev->evbit)) + return true; + + if (test_bit(EV_KEY, dev->evbit)) { + if (find_next_bit(dev->keybit, BTN_MISC, KEY_RESERVED) < + BTN_MISC) + return true; + if (find_next_bit(dev->keybit, KEY_BRL_DOT10 + 1, + KEY_BRL_DOT1) <= KEY_BRL_DOT10) + 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(unsigned 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(unsigned 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; +} + +static unsigned short vt_kdgkbent(unsigned char kbdmode, unsigned char idx, + unsigned char map) +{ + unsigned short *key_map, val; + unsigned long flags; + + /* Ensure another thread doesn't free it under us */ + spin_lock_irqsave(&kbd_event_lock, flags); + key_map = key_maps[map]; + if (key_map) { + val = U(key_map[idx]); + if (kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES) + val = K_HOLE; + } else + val = idx ? K_HOLE : K_NOSUCHMAP; + spin_unlock_irqrestore(&kbd_event_lock, flags); + + return val; +} + +static int vt_kdskbent(unsigned char kbdmode, unsigned char idx, + unsigned char map, unsigned short val) +{ + unsigned long flags; + unsigned short *key_map, *new_map, oldval; + + if (!idx && val == K_NOSUCHMAP) { + spin_lock_irqsave(&kbd_event_lock, flags); + /* deallocate map */ + key_map = key_maps[map]; + if (map && key_map) { + key_maps[map] = NULL; + if (key_map[0] == U(K_ALLOCATED)) { + kfree(key_map); + keymap_count--; + } + } + spin_unlock_irqrestore(&kbd_event_lock, flags); + + return 0; + } + + if (KTYP(val) < NR_TYPES) { + if (KVAL(val) > max_vals[KTYP(val)]) + return -EINVAL; + } else if (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 (!idx) + return 0; +#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[map]; + 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[map] = 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); + + oldval = U(key_map[idx]); + if (val == oldval) + goto out; + + /* Attention Key */ + if ((oldval == K_SAK || val == K_SAK) && !capable(CAP_SYS_ADMIN)) { + spin_unlock_irqrestore(&kbd_event_lock, flags); + return -EPERM; + } + + key_map[idx] = U(val); + if (!map && (KTYP(oldval) == KT_SHIFT || KTYP(val) == KT_SHIFT)) + do_compute_shiftstate(); +out: + spin_unlock_irqrestore(&kbd_event_lock, flags); + + return 0; +} + +int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, + unsigned int console) +{ + struct kbd_struct *kb = &kbd_table[console]; + struct kbentry kbe; + + if (copy_from_user(&kbe, user_kbe, sizeof(struct kbentry))) + return -EFAULT; + + switch (cmd) { + case KDGKBENT: + return put_user(vt_kdgkbent(kb->kbdmode, kbe.kb_index, + kbe.kb_table), + &user_kbe->kb_value); + case KDSKBENT: + if (!perm || !capable(CAP_SYS_TTY_CONFIG)) + return -EPERM; + return vt_kdskbent(kb->kbdmode, kbe.kb_index, kbe.kb_table, + kbe.kb_value); + } + return 0; +} + +static char *vt_kdskbsent(char *kbs, unsigned char cur) +{ + static DECLARE_BITMAP(is_kmalloc, MAX_NR_FUNC); + char *cur_f = func_table[cur]; + + if (cur_f && strlen(cur_f) >= strlen(kbs)) { + strcpy(cur_f, kbs); + return kbs; + } + + func_table[cur] = kbs; + + return __test_and_set_bit(cur, is_kmalloc) ? cur_f : NULL; +} + +int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) +{ + unsigned char kb_func; + unsigned long flags; + char *kbs; + int ret; + + if (get_user(kb_func, &user_kdgkb->kb_func)) + return -EFAULT; + + kb_func = array_index_nospec(kb_func, MAX_NR_FUNC); + + switch (cmd) { + case KDGKBSENT: { + /* size should have been a struct member */ + ssize_t len = sizeof(user_kdgkb->kb_string); + + kbs = kmalloc(len, GFP_KERNEL); + if (!kbs) + return -ENOMEM; + + spin_lock_irqsave(&func_buf_lock, flags); + len = strlcpy(kbs, func_table[kb_func] ? : "", len); + spin_unlock_irqrestore(&func_buf_lock, flags); + + ret = copy_to_user(user_kdgkb->kb_string, kbs, len + 1) ? + -EFAULT : 0; + + break; + } + case KDSKBSENT: + if (!perm || !capable(CAP_SYS_TTY_CONFIG)) + return -EPERM; + + kbs = strndup_user(user_kdgkb->kb_string, + sizeof(user_kdgkb->kb_string)); + if (IS_ERR(kbs)) + return PTR_ERR(kbs); + + spin_lock_irqsave(&func_buf_lock, flags); + kbs = vt_kdskbsent(kbs, kb_func); + spin_unlock_irqrestore(&func_buf_lock, flags); + + ret = 0; + break; + } + + kfree(kbs); + + return ret; +} + +int vt_do_kdskled(unsigned 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(unsigned 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(unsigned 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(unsigned 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_shift_state - 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(unsigned 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(unsigned 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(unsigned 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(unsigned 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); +} |