| /* |
| * 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. |
| */ |
| |
| #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/random.h> |
| #include <linux/init.h> |
| |
| #include <asm/keyboard.h> |
| #include <asm/bitops.h> |
| |
| #include <linux/kbd_kern.h> |
| #include <linux/kbd_diacr.h> |
| #include <linux/vt_kern.h> |
| #include <linux/kbd_ll.h> |
| #include <linux/sysrq.h> |
| #include <linux/pm.h> |
| |
| #define SIZE(x) (sizeof(x)/sizeof((x)[0])) |
| |
| #ifndef KBD_DEFMODE |
| #define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META)) |
| #endif |
| |
| #ifndef KBD_DEFLEDS |
| /* |
| * Some laptops take the 789uiojklm,. keys as number pad when NumLock |
| * is on. This seems a good reason to start with NumLock off. |
| */ |
| #define KBD_DEFLEDS 0 |
| #endif |
| |
| #ifndef KBD_DEFLOCK |
| #define KBD_DEFLOCK 0 |
| #endif |
| |
| void (*kbd_ledfunc)(unsigned int led); |
| EXPORT_SYMBOL(handle_scancode); |
| EXPORT_SYMBOL(kbd_ledfunc); |
| EXPORT_SYMBOL(kbd_refresh_leds); |
| |
| extern void ctrl_alt_del(void); |
| |
| struct console; |
| |
| /* |
| * global state includes the following, and various static variables |
| * in this module: prev_scancode, shift_state, diacr, npadch, dead_key_next. |
| * (last_console is now a global variable) |
| */ |
| |
| /* shift state counters.. */ |
| static unsigned char k_down[NR_SHIFT]; |
| /* keyboard key bitmap */ |
| static unsigned long key_down[256/BITS_PER_LONG]; |
| |
| static int dead_key_next; |
| /* |
| * In order to retrieve the shift_state (for the mouse server), either |
| * the variable must be global, or a new procedure must be created to |
| * return the value. I chose the former way. |
| */ |
| int shift_state; |
| static int npadch = -1; /* -1 or number assembled on pad */ |
| static unsigned char diacr; |
| static char rep; /* flag telling character repeat */ |
| struct kbd_struct kbd_table[MAX_NR_CONSOLES]; |
| static struct tty_struct **ttytab; |
| static struct kbd_struct * kbd = kbd_table; |
| static struct tty_struct * tty; |
| static unsigned char prev_scancode; |
| |
| void compute_shiftstate(void); |
| |
| typedef void (*k_hand)(unsigned char value, char up_flag); |
| typedef void (k_handfn)(unsigned char value, char up_flag); |
| |
| static k_handfn |
| do_self, do_fn, do_spec, do_pad, do_dead, do_cons, do_cur, do_shift, |
| do_meta, do_ascii, do_lock, do_lowercase, do_slock, do_dead2, |
| do_ignore; |
| |
| static k_hand key_handler[16] = { |
| do_self, do_fn, do_spec, do_pad, do_dead, do_cons, do_cur, do_shift, |
| do_meta, do_ascii, do_lock, do_lowercase, do_slock, do_dead2, |
| do_ignore, do_ignore |
| }; |
| |
| /* Key types processed even in raw modes */ |
| |
| #define TYPES_ALLOWED_IN_RAW_MODE ((1 << KT_SPEC) | (1 << KT_SHIFT)) |
| |
| typedef void (*void_fnp)(void); |
| typedef void (void_fn)(void); |
| |
| static void_fn do_null, enter, show_ptregs, send_intr, lastcons, caps_toggle, |
| num, hold, scroll_forw, scroll_back, boot_it, caps_on, compose, |
| SAK, decr_console, incr_console, spawn_console, bare_num; |
| |
| static void_fnp spec_fn_table[] = { |
| do_null, enter, show_ptregs, show_mem, |
| show_state, send_intr, lastcons, caps_toggle, |
| num, hold, scroll_forw, scroll_back, |
| boot_it, caps_on, compose, SAK, |
| decr_console, incr_console, spawn_console, bare_num |
| }; |
| |
| #define SPECIALS_ALLOWED_IN_RAW_MODE (1 << KVAL(K_SAK)) |
| |
| /* maximum values each key_handler can handle */ |
| const int max_vals[] = { |
| 255, SIZE(func_table) - 1, SIZE(spec_fn_table) - 1, NR_PAD - 1, |
| NR_DEAD - 1, 255, 3, NR_SHIFT - 1, |
| 255, NR_ASCII - 1, NR_LOCK - 1, 255, |
| NR_LOCK - 1, 255 |
| }; |
| |
| const int NR_TYPES = SIZE(max_vals); |
| |
| /* N.B. drivers/macintosh/mac_keyb.c needs to call put_queue */ |
| void put_queue(int); |
| static unsigned char handle_diacr(unsigned char); |
| |
| /* kbd_pt_regs - set by keyboard_interrupt(), used by show_ptregs() */ |
| struct pt_regs * kbd_pt_regs; |
| |
| #ifdef CONFIG_MAGIC_SYSRQ |
| static int sysrq_pressed; |
| #endif |
| |
| static struct pm_dev *pm_kbd; |
| |
| /* |
| * 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. |
| */ |
| void to_utf8(ushort c) { |
| if (c < 0x80) |
| put_queue(c); /* 0******* */ |
| else if (c < 0x800) { |
| put_queue(0xc0 | (c >> 6)); /* 110***** 10****** */ |
| put_queue(0x80 | (c & 0x3f)); |
| } else { |
| put_queue(0xe0 | (c >> 12)); /* 1110**** 10****** 10****** */ |
| put_queue(0x80 | ((c >> 6) & 0x3f)); |
| put_queue(0x80 | (c & 0x3f)); |
| } |
| /* UTF-8 is defined for words of up to 31 bits, |
| but we need only 16 bits here */ |
| } |
| |
| /* |
| * Translation of escaped scancodes to keycodes. |
| * This is now user-settable (for machines were it makes sense). |
| */ |
| |
| int setkeycode(unsigned int scancode, unsigned int keycode) |
| { |
| return kbd_setkeycode(scancode, keycode); |
| } |
| |
| int getkeycode(unsigned int scancode) |
| { |
| return kbd_getkeycode(scancode); |
| } |
| |
| void handle_scancode(unsigned char scancode, int down) |
| { |
| unsigned char keycode; |
| char up_flag = down ? 0 : 0200; |
| char raw_mode; |
| char have_keycode; |
| |
| pm_access(pm_kbd); |
| add_keyboard_randomness(scancode | up_flag); |
| |
| tty = ttytab? ttytab[fg_console]: NULL; |
| if (tty && (!tty->driver_data)) { |
| /* |
| * We touch the tty structure via the ttytab array |
| * without knowing whether or not tty is open, which |
| * is inherently dangerous. We currently rely on that |
| * fact that console_open sets tty->driver_data when |
| * it opens it, and clears it when it closes it. |
| */ |
| tty = NULL; |
| } |
| kbd = kbd_table + fg_console; |
| /* |
| * Convert scancode to keycode |
| */ |
| raw_mode = (kbd->kbdmode == VC_RAW); |
| have_keycode = kbd_translate(scancode, &keycode, raw_mode); |
| if (raw_mode) { |
| /* |
| * The following is a workaround for hardware |
| * which sometimes send the key release event twice |
| */ |
| unsigned char next_scancode = scancode|up_flag; |
| if (have_keycode && up_flag && next_scancode==prev_scancode) { |
| /* unexpected 2nd release event */ |
| } else { |
| /* |
| * Only save previous scancode if it was a key-up |
| * and had a single-byte scancode. |
| */ |
| if (!have_keycode) |
| prev_scancode = 1; |
| else if (!up_flag || prev_scancode == 1) |
| prev_scancode = 0; |
| else |
| prev_scancode = next_scancode; |
| put_queue(next_scancode); |
| } |
| /* we do not return yet, because we want to maintain |
| the key_down array, so that we have the correct |
| values when finishing RAW mode or when changing VT's */ |
| } |
| |
| if (!have_keycode) |
| goto out; |
| |
| /* |
| * At this point the variable `keycode' contains the keycode. |
| * Note: the keycode must not be 0 (++Geert: on m68k 0 is valid). |
| * We keep track of the up/down status of the key, and |
| * return the keycode if in MEDIUMRAW mode. |
| */ |
| |
| if (up_flag) { |
| rep = 0; |
| if(!test_and_clear_bit(keycode, key_down)) |
| up_flag = kbd_unexpected_up(keycode); |
| } else |
| rep = test_and_set_bit(keycode, key_down); |
| |
| #ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */ |
| if (keycode == SYSRQ_KEY) { |
| sysrq_pressed = !up_flag; |
| goto out; |
| } else if (sysrq_pressed) { |
| if (!up_flag) { |
| handle_sysrq(kbd_sysrq_xlate[keycode], kbd_pt_regs, kbd, tty); |
| goto out; |
| } |
| } |
| #endif |
| |
| if (kbd->kbdmode == VC_MEDIUMRAW) { |
| /* soon keycodes will require more than one byte */ |
| put_queue(keycode + up_flag); |
| raw_mode = 1; /* Most key classes will be ignored */ |
| } |
| |
| /* |
| * Small change in philosophy: earlier we defined repetition by |
| * rep = keycode == prev_keycode; |
| * prev_keycode = keycode; |
| * but now by the fact that the depressed key was down already. |
| * Does this ever make a difference? Yes. |
| */ |
| |
| /* |
| * Repeat a key only if the input buffers are empty or the |
| * characters get echoed locally. This makes key repeat usable |
| * with slow applications and under heavy loads. |
| */ |
| if (!rep || |
| (vc_kbd_mode(kbd,VC_REPEAT) && tty && |
| (L_ECHO(tty) || (tty->driver.chars_in_buffer(tty) == 0)))) { |
| u_short keysym; |
| u_char type; |
| |
| /* the XOR below used to be an OR */ |
| int shift_final = (shift_state | kbd->slockstate) ^ |
| kbd->lockstate; |
| ushort *key_map = key_maps[shift_final]; |
| |
| if (key_map != NULL) { |
| keysym = key_map[keycode]; |
| type = KTYP(keysym); |
| |
| if (type >= 0xf0) { |
| type -= 0xf0; |
| if (raw_mode && ! (TYPES_ALLOWED_IN_RAW_MODE & (1 << type))) |
| goto out; |
| 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]; |
| } |
| } |
| (*key_handler[type])(keysym & 0xff, up_flag); |
| if (type != KT_SLOCK) |
| kbd->slockstate = 0; |
| } else { |
| /* maybe only if (kbd->kbdmode == VC_UNICODE) ? */ |
| if (!up_flag && !raw_mode) |
| to_utf8(keysym); |
| } |
| } else { |
| /* maybe beep? */ |
| /* we have at least to update shift_state */ |
| #if 1 /* how? two almost equivalent choices follow */ |
| compute_shiftstate(); |
| kbd->slockstate = 0; /* play it safe */ |
| #else |
| keysym = U(key_maps[0][keycode]); |
| type = KTYP(keysym); |
| if (type == KT_SHIFT) |
| (*key_handler[type])(keysym & 0xff, up_flag); |
| #endif |
| } |
| } |
| out: |
| do_poke_blanked_console = 1; |
| schedule_console_callback(); |
| } |
| |
| void put_queue(int ch) |
| { |
| if (tty) { |
| tty_insert_flip_char(tty, ch, 0); |
| con_schedule_flip(tty); |
| } |
| } |
| |
| static void puts_queue(char *cp) |
| { |
| if (!tty) |
| return; |
| |
| while (*cp) { |
| tty_insert_flip_char(tty, *cp, 0); |
| cp++; |
| } |
| con_schedule_flip(tty); |
| } |
| |
| static void applkey(int key, char mode) |
| { |
| static char buf[] = { 0x1b, 'O', 0x00, 0x00 }; |
| |
| buf[1] = (mode ? 'O' : '['); |
| buf[2] = key; |
| puts_queue(buf); |
| } |
| |
| static void enter(void) |
| { |
| if (diacr) { |
| put_queue(diacr); |
| diacr = 0; |
| } |
| put_queue(13); |
| if (vc_kbd_mode(kbd,VC_CRLF)) |
| put_queue(10); |
| } |
| |
| static void caps_toggle(void) |
| { |
| if (rep) |
| return; |
| chg_vc_kbd_led(kbd, VC_CAPSLOCK); |
| } |
| |
| static void caps_on(void) |
| { |
| if (rep) |
| return; |
| set_vc_kbd_led(kbd, VC_CAPSLOCK); |
| } |
| |
| static void show_ptregs(void) |
| { |
| if (kbd_pt_regs) |
| show_regs(kbd_pt_regs); |
| } |
| |
| static void hold(void) |
| { |
| 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 num(void) |
| { |
| if (vc_kbd_mode(kbd,VC_APPLIC)) |
| applkey('P', 1); |
| else |
| bare_num(); |
| } |
| |
| /* |
| * 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 bare_num(void) |
| { |
| if (!rep) |
| chg_vc_kbd_led(kbd,VC_NUMLOCK); |
| } |
| |
| static void lastcons(void) |
| { |
| /* switch to the last used console, ChN */ |
| set_console(last_console); |
| } |
| |
| static void decr_console(void) |
| { |
| int i; |
| |
| for (i = fg_console-1; i != fg_console; i--) { |
| if (i == -1) |
| i = MAX_NR_CONSOLES-1; |
| if (vc_cons_allocated(i)) |
| break; |
| } |
| set_console(i); |
| } |
| |
| static void incr_console(void) |
| { |
| int i; |
| |
| for (i = fg_console+1; i != fg_console; i++) { |
| if (i == MAX_NR_CONSOLES) |
| i = 0; |
| if (vc_cons_allocated(i)) |
| break; |
| } |
| set_console(i); |
| } |
| |
| static void send_intr(void) |
| { |
| if (!tty) |
| return; |
| tty_insert_flip_char(tty, 0, TTY_BREAK); |
| con_schedule_flip(tty); |
| } |
| |
| static void scroll_forw(void) |
| { |
| scrollfront(0); |
| } |
| |
| static void scroll_back(void) |
| { |
| scrollback(0); |
| } |
| |
| static void boot_it(void) |
| { |
| ctrl_alt_del(); |
| } |
| |
| static void compose(void) |
| { |
| dead_key_next = 1; |
| } |
| |
| int spawnpid, spawnsig; |
| |
| static void spawn_console(void) |
| { |
| if (spawnpid) |
| if(kill_proc(spawnpid, spawnsig, 1)) |
| spawnpid = 0; |
| } |
| |
| static void SAK(void) |
| { |
| /* |
| * SAK should also work in all raw modes and reset |
| * them properly. |
| */ |
| |
| do_SAK(tty); |
| reset_vc(fg_console); |
| #if 0 |
| do_unblank_screen(); /* not in interrupt routine? */ |
| #endif |
| } |
| |
| static void do_ignore(unsigned char value, char up_flag) |
| { |
| } |
| |
| static void do_null() |
| { |
| compute_shiftstate(); |
| } |
| |
| static void do_spec(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; |
| if (value >= SIZE(spec_fn_table)) |
| return; |
| if ((kbd->kbdmode == VC_RAW || kbd->kbdmode == VC_MEDIUMRAW) && |
| !(SPECIALS_ALLOWED_IN_RAW_MODE & (1 << value))) |
| return; |
| spec_fn_table[value](); |
| } |
| |
| static void do_lowercase(unsigned char value, char up_flag) |
| { |
| printk(KERN_ERR "keyboard.c: do_lowercase was called - impossible\n"); |
| } |
| |
| static void do_self(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; /* no action, if this is a key release */ |
| |
| if (diacr) |
| value = handle_diacr(value); |
| |
| if (dead_key_next) { |
| dead_key_next = 0; |
| diacr = value; |
| return; |
| } |
| |
| put_queue(value); |
| } |
| |
| #define A_GRAVE '`' |
| #define A_ACUTE '\'' |
| #define A_CFLEX '^' |
| #define A_TILDE '~' |
| #define A_DIAER '"' |
| #define A_CEDIL ',' |
| static unsigned char ret_diacr[NR_DEAD] = |
| {A_GRAVE, A_ACUTE, A_CFLEX, A_TILDE, A_DIAER, A_CEDIL }; |
| |
| /* Obsolete - for backwards compatibility only */ |
| static void do_dead(unsigned char value, char up_flag) |
| { |
| value = ret_diacr[value]; |
| do_dead2(value,up_flag); |
| } |
| |
| /* |
| * Handle dead key. Note that we now may have several |
| * dead keys modifying the same character. Very useful |
| * for Vietnamese. |
| */ |
| static void do_dead2(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; |
| |
| diacr = (diacr ? handle_diacr(value) : value); |
| } |
| |
| |
| /* |
| * 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. |
| */ |
| unsigned char handle_diacr(unsigned char ch) |
| { |
| int d = diacr; |
| int i; |
| |
| diacr = 0; |
| |
| 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 == d) |
| return d; |
| |
| put_queue(d); |
| return ch; |
| } |
| |
| static void do_cons(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; |
| set_console(value); |
| } |
| |
| static void do_fn(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; |
| if (value < SIZE(func_table)) { |
| if (func_table[value]) |
| puts_queue(func_table[value]); |
| } else |
| printk(KERN_ERR "do_fn called with value=%d\n", value); |
| } |
| |
| static void do_pad(unsigned char value, char up_flag) |
| { |
| static const char *pad_chars = "0123456789+-*/\015,.?()"; |
| static const char *app_map = "pqrstuvwxylSRQMnnmPQ"; |
| |
| 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) && !k_down[KG_SHIFT]) { |
| applkey(app_map[value], 1); |
| return; |
| } |
| |
| if (!vc_kbd_led(kbd,VC_NUMLOCK)) |
| switch (value) { |
| case KVAL(K_PCOMMA): |
| case KVAL(K_PDOT): |
| do_fn(KVAL(K_REMOVE), 0); |
| return; |
| case KVAL(K_P0): |
| do_fn(KVAL(K_INSERT), 0); |
| return; |
| case KVAL(K_P1): |
| do_fn(KVAL(K_SELECT), 0); |
| return; |
| case KVAL(K_P2): |
| do_cur(KVAL(K_DOWN), 0); |
| return; |
| case KVAL(K_P3): |
| do_fn(KVAL(K_PGDN), 0); |
| return; |
| case KVAL(K_P4): |
| do_cur(KVAL(K_LEFT), 0); |
| return; |
| case KVAL(K_P6): |
| do_cur(KVAL(K_RIGHT), 0); |
| return; |
| case KVAL(K_P7): |
| do_fn(KVAL(K_FIND), 0); |
| return; |
| case KVAL(K_P8): |
| do_cur(KVAL(K_UP), 0); |
| return; |
| case KVAL(K_P9): |
| do_fn(KVAL(K_PGUP), 0); |
| return; |
| case KVAL(K_P5): |
| applkey('G', vc_kbd_mode(kbd, VC_APPLIC)); |
| return; |
| } |
| |
| put_queue(pad_chars[value]); |
| if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF)) |
| put_queue(10); |
| } |
| |
| static void do_cur(unsigned char value, char up_flag) |
| { |
| static const char *cur_chars = "BDCA"; |
| if (up_flag) |
| return; |
| |
| applkey(cur_chars[value], vc_kbd_mode(kbd,VC_CKMODE)); |
| } |
| |
| static void do_shift(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 (k_down[value]) |
| k_down[value]--; |
| } else |
| k_down[value]++; |
| |
| if (k_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(npadch & 0xffff); |
| else |
| put_queue(npadch & 0xff); |
| npadch = -1; |
| } |
| } |
| |
| /* called after returning from RAW mode or when changing consoles - |
| recompute k_down[] and shift_state from key_down[] */ |
| /* maybe called when keymap is undefined, so that shiftkey release is seen */ |
| void compute_shiftstate(void) |
| { |
| int i, j, k, sym, val; |
| |
| shift_state = 0; |
| for(i=0; i < SIZE(k_down); i++) |
| k_down[i] = 0; |
| |
| for(i=0; i < SIZE(key_down); i++) |
| if(key_down[i]) { /* skip this word if not a single bit on */ |
| k = i*BITS_PER_LONG; |
| for(j=0; j<BITS_PER_LONG; j++,k++) |
| if(test_bit(k, key_down)) { |
| sym = U(key_maps[0][k]); |
| if(KTYP(sym) == KT_SHIFT || KTYP(sym) == KT_SLOCK) { |
| val = KVAL(sym); |
| if (val == KVAL(K_CAPSSHIFT)) |
| val = KVAL(K_SHIFT); |
| k_down[val]++; |
| shift_state |= (1<<val); |
| } |
| } |
| } |
| } |
| |
| static void do_meta(unsigned char value, char up_flag) |
| { |
| if (up_flag) |
| return; |
| |
| if (vc_kbd_mode(kbd, VC_META)) { |
| put_queue('\033'); |
| put_queue(value); |
| } else |
| put_queue(value | 0x80); |
| } |
| |
| static void do_ascii(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 do_lock(unsigned char value, char up_flag) |
| { |
| if (up_flag || rep) |
| return; |
| chg_vc_kbd_lock(kbd, value); |
| } |
| |
| static void do_slock(unsigned char value, char up_flag) |
| { |
| do_shift(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); |
| } |
| } |
| |
| /* |
| * 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 ledstate = 0xff; /* undefined */ |
| static unsigned char ledioctl; |
| |
| 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 struct ledptr { |
| unsigned int *addr; |
| unsigned int mask; |
| unsigned char valid:1; |
| } ledptrs[3]; |
| |
| void register_leds(int console, unsigned int led, |
| unsigned int *addr, unsigned int mask) { |
| struct kbd_struct *kbd = kbd_table + console; |
| if (led < 3) { |
| ledptrs[led].addr = addr; |
| ledptrs[led].mask = mask; |
| ledptrs[led].valid = 1; |
| kbd->ledmode = LED_SHOW_MEM; |
| } else |
| kbd->ledmode = LED_SHOW_FLAGS; |
| } |
| |
| static inline unsigned char getleds(void){ |
| struct kbd_struct *kbd = kbd_table + fg_console; |
| unsigned char leds; |
| |
| if (kbd->ledmode == LED_SHOW_IOCTL) |
| return ledioctl; |
| leds = kbd->ledflagstate; |
| if (kbd->ledmode == LED_SHOW_MEM) { |
| if (ledptrs[0].valid) { |
| if (*ledptrs[0].addr & ledptrs[0].mask) |
| leds |= 1; |
| else |
| leds &= ~1; |
| } |
| if (ledptrs[1].valid) { |
| if (*ledptrs[1].addr & ledptrs[1].mask) |
| leds |= 2; |
| else |
| leds &= ~2; |
| } |
| if (ledptrs[2].valid) { |
| if (*ledptrs[2].addr & ledptrs[2].mask) |
| leds |= 4; |
| else |
| leds &= ~4; |
| } |
| } |
| 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_ledfunc => input_event(dev, EV_LED, ...) => ... |
| */ |
| static void kbd_bh(unsigned long dummy) |
| { |
| unsigned char leds = getleds(); |
| |
| if (leds != ledstate) { |
| ledstate = leds; |
| kbd_leds(leds); |
| if (kbd_ledfunc) kbd_ledfunc(leds); |
| } |
| } |
| |
| EXPORT_SYMBOL(keyboard_tasklet); |
| DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0); |
| |
| /* |
| * This allows a newly plugged keyboard to pick the LED state. |
| * We do it in this seemindly backwards fashion to ensure proper locking. |
| * Built-in keyboard does refresh on its own. |
| */ |
| void kbd_refresh_leds(void) |
| { |
| tasklet_disable(&keyboard_tasklet); |
| if (ledstate != 0xff && kbd_ledfunc != NULL) kbd_ledfunc(ledstate); |
| tasklet_enable(&keyboard_tasklet); |
| } |
| |
| typedef void (pm_kbd_func) (void); |
| |
| pm_callback pm_kbd_request_override = NULL; |
| |
| int __init kbd_init(void) |
| { |
| int i; |
| struct kbd_struct kbd0; |
| extern struct tty_driver console_driver; |
| |
| 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; |
| |
| ttytab = console_driver.table; |
| |
| kbd_init_hw(); |
| |
| tasklet_enable(&keyboard_tasklet); |
| tasklet_schedule(&keyboard_tasklet); |
| |
| pm_kbd = pm_register(PM_SYS_DEV, PM_SYS_KBC, pm_kbd_request_override); |
| |
| return 0; |
| } |