/* * linux/drivers/char/keyboard.c * * 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) */ #include <linux/config.h> #include <linux/module.h> #include <linux/sched.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/kbd_kern.h> #include <linux/kbd_diacr.h> #include <linux/vt_kern.h> #include <linux/sysrq.h> #include <linux/input.h> static void kbd_disconnect(struct input_handle *handle); extern void ctrl_alt_del(void); /* * Exported functions/variables */ #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META)) /* * Some laptops take the 789uiojklm,. keys as number pad when NumLock is on. * This seems a good reason to start with NumLock off. On HIL keyboards * of PARISC machines however there is no NumLock key and everyone expects the keypad * to be used for numbers. */ #if defined(CONFIG_PARISC) && (defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD)) #define KBD_DEFLEDS (1 << VC_NUMLOCK) #else #define KBD_DEFLEDS 0 #endif #define KBD_DEFLOCK 0 void compute_shiftstate(void); /* * 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, struct pt_regs *regs); 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, struct pt_regs *regs); static fn_handler_fn FN_HANDLERS; static fn_handler_fn *fn_handler[] = { FN_HANDLERS }; /* * Variables exported for vt_ioctl.c */ /* maximum values each key_handler can handle */ 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 }; const int NR_TYPES = ARRAY_SIZE(max_vals); struct kbd_struct kbd_table[MAX_NR_CONSOLES]; static struct kbd_struct *kbd = kbd_table; static struct kbd_struct kbd0; int spawnpid, spawnsig; /* * Variables exported for vt.c */ int shift_state = 0; /* * Internal Data. */ static struct input_handler kbd_handler; static unsigned long key_down[NBITS(KEY_MAX)]; /* keyboard key bitmap */ static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */ static int 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 unsigned char ledstate = 0xff; /* undefined */ static unsigned char ledioctl; static struct ledptr { unsigned int *addr; unsigned int mask; unsigned char valid:1; } ledptrs[3]; /* Simple translation table for the SysRq keys */ #ifdef CONFIG_MAGIC_SYSRQ unsigned char kbd_sysrq_xlate[KEY_MAX + 1] = "\000\0331234567890-=\177\t" /* 0x00 - 0x0f */ "qwertyuiop[]\r\000as" /* 0x10 - 0x1f */ "dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */ "bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */ "\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */ "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */ "\r\000/"; /* 0x60 - 0x6f */ static int sysrq_down; #endif static int sysrq_alt; /* * Translation of scancodes to keycodes. We set them on only the first attached * keyboard - for per-keyboard setting, /dev/input/event is more useful. */ int getkeycode(unsigned int scancode) { struct list_head *node; struct input_dev *dev = NULL; list_for_each(node, &kbd_handler.h_list) { struct input_handle *handle = to_handle_h(node); if (handle->dev->keycodesize) { dev = handle->dev; break; } } if (!dev) return -ENODEV; if (scancode >= dev->keycodemax) return -EINVAL; return INPUT_KEYCODE(dev, scancode); } int setkeycode(unsigned int scancode, unsigned int keycode) { struct list_head *node; struct input_dev *dev = NULL; unsigned int i, oldkey; list_for_each(node, &kbd_handler.h_list) { struct input_handle *handle = to_handle_h(node); if (handle->dev->keycodesize) { dev = handle->dev; break; } } if (!dev) return -ENODEV; if (scancode >= dev->keycodemax) return -EINVAL; if (keycode < 0 || keycode > KEY_MAX) return -EINVAL; if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8))) return -EINVAL; oldkey = SET_INPUT_KEYCODE(dev, scancode, keycode); clear_bit(oldkey, dev->keybit); set_bit(keycode, dev->keybit); for (i = 0; i < dev->keycodemax; i++) if (INPUT_KEYCODE(dev,i) == oldkey) set_bit(oldkey, dev->keybit); return 0; } /* * Making beeps and bells. */ static void kd_nosound(unsigned long ignored) { struct list_head *node; list_for_each(node,&kbd_handler.h_list) { struct input_handle *handle = to_handle_h(node); if (test_bit(EV_SND, handle->dev->evbit)) { if (test_bit(SND_TONE, handle->dev->sndbit)) input_event(handle->dev, EV_SND, SND_TONE, 0); if (test_bit(SND_BELL, handle->dev->sndbit)) input_event(handle->dev, EV_SND, SND_BELL, 0); } } } static DEFINE_TIMER(kd_mksound_timer, kd_nosound, 0, 0); void kd_mksound(unsigned int hz, unsigned int ticks) { struct list_head *node; del_timer(&kd_mksound_timer); if (hz) { list_for_each_prev(node, &kbd_handler.h_list) { struct input_handle *handle = to_handle_h(node); if (test_bit(EV_SND, handle->dev->evbit)) { if (test_bit(SND_TONE, handle->dev->sndbit)) { input_event(handle->dev, EV_SND, SND_TONE, hz); break; } if (test_bit(SND_BELL, handle->dev->sndbit)) { input_event(handle->dev, EV_SND, SND_BELL, 1); break; } } } if (ticks) mod_timer(&kd_mksound_timer, jiffies + ticks); } else kd_nosound(0); } /* * Setting the keyboard rate. */ int kbd_rate(struct kbd_repeat *rep) { struct list_head *node; unsigned int d = 0; unsigned int p = 0; list_for_each(node,&kbd_handler.h_list) { struct input_handle *handle = to_handle_h(node); struct input_dev *dev = handle->dev; if (test_bit(EV_REP, dev->evbit)) { if (rep->delay > 0) input_event(dev, EV_REP, REP_DELAY, rep->delay); if (rep->period > 0) input_event(dev, EV_REP, REP_PERIOD, rep->period); d = dev->rep[REP_DELAY]; p = dev->rep[REP_PERIOD]; } } rep->delay = d; rep->period = p; return 0; } /* * Helper Functions. */ static void put_queue(struct vc_data *vc, int ch) { struct tty_struct *tty = vc->vc_tty; if (tty) { tty_insert_flip_char(tty, ch, 0); con_schedule_flip(tty); } } static void puts_queue(struct vc_data *vc, char *cp) { struct tty_struct *tty = vc->vc_tty; if (!tty) return; while (*cp) { tty_insert_flip_char(tty, *cp, 0); cp++; } con_schedule_flip(tty); } 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. UTF-8 is defined for words of up to 31 bits, * but we need only 16 bits here */ static void to_utf8(struct vc_data *vc, ushort 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 { /* 1110**** 10****** 10****** */ put_queue(vc, 0xe0 | (c >> 12)); 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 */ void compute_shiftstate(void) { unsigned int i, j, k, sym, val; shift_state = 0; memset(shift_down, 0, sizeof(shift_down)); for (i = 0; i < ARRAY_SIZE(key_down); i++) { if (!key_down[i]) continue; k = i * BITS_PER_LONG; for (j = 0; j < BITS_PER_LONG; j++, k++) { if (!test_bit(k, key_down)) continue; 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 |= (1 << val); } } } /* * 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 if (d < 0x100) put_queue(vc, d); return ch; } /* * Special function handlers */ static void fn_enter(struct vc_data *vc, struct pt_regs *regs) { if (diacr) { if (kbd->kbdmode == VC_UNICODE) to_utf8(vc, diacr); else if (diacr < 0x100) put_queue(vc, diacr); 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, struct pt_regs *regs) { if (rep) return; chg_vc_kbd_led(kbd, VC_CAPSLOCK); } static void fn_caps_on(struct vc_data *vc, struct pt_regs *regs) { if (rep) return; set_vc_kbd_led(kbd, VC_CAPSLOCK); } static void fn_show_ptregs(struct vc_data *vc, struct pt_regs *regs) { if (regs) show_regs(regs); } static void fn_hold(struct vc_data *vc, struct pt_regs *regs) { struct tty_struct *tty = vc->vc_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, struct pt_regs *regs) { if (vc_kbd_mode(kbd,VC_APPLIC)) applkey(vc, 'P', 1); else fn_bare_num(vc, regs); } /* * 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, struct pt_regs *regs) { if (!rep) chg_vc_kbd_led(kbd, VC_NUMLOCK); } static void fn_lastcons(struct vc_data *vc, struct pt_regs *regs) { /* switch to the last used console, ChN */ set_console(last_console); } static void fn_dec_console(struct vc_data *vc, struct pt_regs *regs) { 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, struct pt_regs *regs) { 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, struct pt_regs *regs) { struct tty_struct *tty = vc->vc_tty; if (!tty) return; tty_insert_flip_char(tty, 0, TTY_BREAK); con_schedule_flip(tty); } static void fn_scroll_forw(struct vc_data *vc, struct pt_regs *regs) { scrollfront(vc, 0); } static void fn_scroll_back(struct vc_data *vc, struct pt_regs *regs) { scrollback(vc, 0); } static void fn_show_mem(struct vc_data *vc, struct pt_regs *regs) { show_mem(); } static void fn_show_state(struct vc_data *vc, struct pt_regs *regs) { show_state(); } static void fn_boot_it(struct vc_data *vc, struct pt_regs *regs) { ctrl_alt_del(); } static void fn_compose(struct vc_data *vc, struct pt_regs *regs) { dead_key_next = 1; } static void fn_spawn_con(struct vc_data *vc, struct pt_regs *regs) { if (spawnpid) if (kill_proc(spawnpid, spawnsig, 1)) spawnpid = 0; } static void fn_SAK(struct vc_data *vc, struct pt_regs *regs) { struct tty_struct *tty = vc->vc_tty; /* * SAK should also work in all raw modes and reset * them properly. */ if (tty) do_SAK(tty); reset_vc(vc); } static void fn_null(struct vc_data *vc, struct pt_regs *regs) { compute_shiftstate(); } /* * Special key handlers */ static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { } static void k_spec(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { if (up_flag) return; if (value >= ARRAY_SIZE(fn_handler)) return; if ((kbd->kbdmode == VC_RAW || kbd->kbdmode == VC_MEDIUMRAW) && value != KVAL(K_SAK)) return; /* SAK is allowed even in raw mode */ fn_handler[value](vc, regs); } static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n"); } static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag, struct pt_regs *regs) { 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 = 0; diacr = value; return; } if (kbd->kbdmode == VC_UNICODE) to_utf8(vc, value); else if (value < 0x100) put_queue(vc, value); } /* * 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, struct pt_regs *regs) { 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, struct pt_regs *regs) { k_unicode(vc, value, up_flag, regs); } static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { k_deadunicode(vc, value, up_flag, regs); } /* * Obsolete - for backwards compatibility only */ static void k_dead(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { static unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' }; value = ret_diacr[value]; k_deadunicode(vc, value, up_flag, regs); } static void k_cons(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { if (up_flag) return; set_console(value); } static void k_fn(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { unsigned v; if (up_flag) return; v = value; if (v < ARRAY_SIZE(func_table)) { if (func_table[value]) puts_queue(vc, func_table[value]); } else printk(KERN_ERR "k_fn called with value=%d\n", value); } static void k_cur(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { 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, struct pt_regs *regs) { 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, regs); return; case KVAL(K_P0): k_fn(vc, KVAL(K_INSERT), 0, regs); return; case KVAL(K_P1): k_fn(vc, KVAL(K_SELECT), 0, regs); return; case KVAL(K_P2): k_cur(vc, KVAL(K_DOWN), 0, regs); return; case KVAL(K_P3): k_fn(vc, KVAL(K_PGDN), 0, regs); return; case KVAL(K_P4): k_cur(vc, KVAL(K_LEFT), 0, regs); return; case KVAL(K_P6): k_cur(vc, KVAL(K_RIGHT), 0, regs); return; case KVAL(K_P7): k_fn(vc, KVAL(K_FIND), 0, regs); return; case KVAL(K_P8): k_cur(vc, KVAL(K_UP), 0, regs); return; case KVAL(K_P9): k_fn(vc, KVAL(K_PGUP), 0, regs); 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, struct pt_regs *regs) { 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 & 0xffff); else put_queue(vc, npadch & 0xff); npadch = -1; } } static void k_meta(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { 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, struct pt_regs *regs) { 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, struct pt_regs *regs) { 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, struct pt_regs *regs) { k_shift(vc, value, up_flag, regs); 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, struct pt_regs *regs) { static unsigned long chords; static unsigned committed; if (!brl_nbchords) k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag, regs); else { committed |= pattern; chords++; if (chords == brl_nbchords) { k_unicode(vc, BRL_UC_ROW | committed, up_flag, regs); chords = 0; committed = 0; } } } static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs) { static unsigned pressed,committing; static unsigned long releasestart; if (kbd->kbdmode != VC_UNICODE) { if (!up_flag) printk("keyboard mode must be unicode for braille patterns\n"); return; } if (!value) { k_unicode(vc, BRL_UC_ROW, up_flag, regs); return; } if (value > 8) return; if (up_flag) { if (brl_timeout) { if (!committing || jiffies - releasestart > (brl_timeout * HZ) / 1000) { committing = pressed; releasestart = jiffies; } pressed &= ~(1 << (value - 1)); if (!pressed) { if (committing) { k_brlcommit(vc, committing, 0, regs); committing = 0; } } } else { if (committing) { k_brlcommit(vc, committing, 0, regs); committing = 0; } pressed &= ~(1 << (value - 1)); } } else { pressed |= 1 << (value - 1); if (!brl_timeout) committing = pressed; } } /* * 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. */ unsigned char getledstate(void) { return ledstate; } void setledstate(struct kbd_struct *kbd, unsigned int led) { if (!(led & ~7)) { ledioctl = led; kbd->ledmode = LED_SHOW_IOCTL; } else kbd->ledmode = LED_SHOW_FLAGS; set_leds(); } static inline unsigned char getleds(void) { struct kbd_struct *kbd = kbd_table + fg_console; unsigned char leds; int i; if (kbd->ledmode == LED_SHOW_IOCTL) return ledioctl; leds = kbd->ledflagstate; if (kbd->ledmode == LED_SHOW_MEM) { for (i = 0; i < 3; i++) if (ledptrs[i].valid) { if (*ledptrs[i].addr & ledptrs[i].mask) leds |= (1 << i); else leds &= ~(1 << i); } } return leds; } /* * This routine is the bottom half of the keyboard interrupt * routine, and runs with all interrupts enabled. It does * console changing, led setting and copy_to_cooked, which can * take a reasonably long time. * * Aside from timing (which isn't really that important for * keyboard interrupts as they happen often), using the software * interrupt routines for this thing allows us to easily mask * this when we don't want any of the above to happen. * This allows for easy and efficient race-condition prevention * for kbd_refresh_leds => input_event(dev, EV_LED, ...) => ... */ static void kbd_bh(unsigned long dummy) { struct list_head *node; unsigned char leds = getleds(); if (leds != ledstate) { list_for_each(node, &kbd_handler.h_list) { struct input_handle * handle = to_handle_h(node); input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01)); input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02)); input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04)); input_sync(handle->dev); } } ledstate = leds; } DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0); /* * This allows a newly plugged keyboard to pick the LED state. */ static void kbd_refresh_leds(struct input_handle *handle) { unsigned char leds = ledstate; tasklet_disable(&keyboard_tasklet); if (leds != 0xff) { input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01)); input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02)); input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04)); input_sync(handle->dev); } tasklet_enable(&keyboard_tasklet); } #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 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, 284,285,309,298,312, 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, 103,104,105,275,287,279,306,106,274,107,294,364,358,363,362,361, 291,108,381,281,290,272,292,305,280, 99,112,257,258,359,113,114, 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_MAC_EMUMOUSEBTN extern int mac_hid_mouse_emulate_buttons(int, int, int); #endif /* CONFIG_MAC_EMUMOUSEBTN */ #ifdef CONFIG_SPARC static int sparc_l1_a_state = 0; extern void sun_do_break(void); #endif static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag) { if (keycode > 255 || !x86_keycodes[keycode]) return -1; switch (keycode) { case KEY_PAUSE: put_queue(vc, 0xe1); put_queue(vc, 0x1d | up_flag); put_queue(vc, 0x45 | up_flag); return 0; case KEY_HANGUEL: if (!up_flag) put_queue(vc, 0xf1); return 0; case KEY_HANJA: if (!up_flag) put_queue(vc, 0xf2); return 0; } if (keycode == KEY_SYSRQ && sysrq_alt) { put_queue(vc, 0x54 | up_flag); return 0; } if (x86_keycodes[keycode] & 0x100) put_queue(vc, 0xe0); put_queue(vc, (x86_keycodes[keycode] & 0x7f) | up_flag); if (keycode == KEY_SYSRQ) { put_queue(vc, 0xe0); put_queue(vc, 0x37 | up_flag); } return 0; } #else #define HW_RAW(dev) 0 #warning "Cannot generate rawmode keyboard for your architecture yet." 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 + fg_console; if (kbd->kbdmode == VC_RAW) put_queue(vc, data); } static void kbd_keycode(unsigned int keycode, int down, int hw_raw, struct pt_regs *regs) { struct vc_data *vc = vc_cons[fg_console].d; unsigned short keysym, *key_map; unsigned char type, raw_mode; struct tty_struct *tty; int shift_final; tty = vc->vc_tty; if (tty && (!tty->driver_data)) { /* No driver data? Strange. Okay we fix it then. */ tty->driver_data = vc; } kbd = kbd_table + fg_console; if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT) sysrq_alt = down; #ifdef CONFIG_SPARC if (keycode == KEY_STOP) sparc_l1_a_state = down; #endif rep = (down == 2); #ifdef CONFIG_MAC_EMUMOUSEBTN if (mac_hid_mouse_emulate_buttons(1, keycode, down)) return; #endif /* CONFIG_MAC_EMUMOUSEBTN */ if ((raw_mode = (kbd->kbdmode == VC_RAW)) && !hw_raw) if (emulate_raw(vc, keycode, !down << 7)) if (keycode < BTN_MISC) printk(KERN_WARNING "keyboard.c: can't emulate rawmode for keycode %d\n", keycode); #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */ if (keycode == KEY_SYSRQ && (sysrq_down || (down == 1 && sysrq_alt))) { sysrq_down = down; return; } if (sysrq_down && down && !rep) { handle_sysrq(kbd_sysrq_xlate[keycode], regs, tty); return; } #endif #ifdef CONFIG_SPARC if (keycode == KEY_A && sparc_l1_a_state) { sparc_l1_a_state = 0; 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 = 1; } 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->driver->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; } shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate; key_map = key_maps[shift_final]; if (!key_map) { compute_shiftstate(); kbd->slockstate = 0; return; } if (keycode > NR_KEYS) if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8) keysym = K(KT_BRL, keycode - KEY_BRL_DOT1 + 1); else return; else keysym = key_map[keycode]; type = KTYP(keysym); if (type < 0xf0) { if (down && !raw_mode) to_utf8(vc, keysym); return; } type -= 0xf0; if (raw_mode && type != KT_SPEC && type != KT_SHIFT) return; 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]; } } (*k_handler[type])(vc, keysym & 0xff, !down, regs); 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) { 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), handle->dev->regs); tasklet_schedule(&keyboard_tasklet); do_poke_blanked_console = 1; schedule_console_callback(); } /* * 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 struct input_handle *kbd_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) { struct input_handle *handle; int i; for (i = KEY_RESERVED; i < BTN_MISC; i++) if (test_bit(i, dev->keybit)) break; if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit)) return NULL; if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL))) return NULL; memset(handle, 0, sizeof(struct input_handle)); handle->dev = dev; handle->handler = handler; handle->name = "kbd"; input_open_device(handle); kbd_refresh_leds(handle); return handle; } static void kbd_disconnect(struct input_handle *handle) { input_close_device(handle); kfree(handle); } static struct input_device_id kbd_ids[] = { { .flags = INPUT_DEVICE_ID_MATCH_EVBIT, .evbit = { BIT(EV_KEY) }, }, { .flags = INPUT_DEVICE_ID_MATCH_EVBIT, .evbit = { BIT(EV_SND) }, }, { }, /* Terminating entry */ }; MODULE_DEVICE_TABLE(input, kbd_ids); static struct input_handler kbd_handler = { .event = kbd_event, .connect = kbd_connect, .disconnect = kbd_disconnect, .name = "kbd", .id_table = kbd_ids, }; int __init kbd_init(void) { int i; kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS; kbd0.ledmode = LED_SHOW_FLAGS; kbd0.lockstate = KBD_DEFLOCK; kbd0.slockstate = 0; kbd0.modeflags = KBD_DEFMODE; kbd0.kbdmode = VC_XLATE; for (i = 0 ; i < MAX_NR_CONSOLES ; i++) kbd_table[i] = kbd0; input_register_handler(&kbd_handler); tasklet_enable(&keyboard_tasklet); tasklet_schedule(&keyboard_tasklet); return 0; }