sunkbd.c

arm平台上的uclinux系统全部源代码

		rep = 0;
		clear_bit(keycode, key_down);
	} else {
		auto_repeat_timer.expires = jiffies+HZ/5;
		add_timer (&auto_repeat_timer);
		rep = set_bit(keycode, key_down);
	}

	if(raw_mode)
		return;

	if(kbd->kbdmode == VC_MEDIUMRAW) {
		put_queue(keycode + up_flag);
		return;
	}

 	/*
	 * 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->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 (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 beep? */
			/* we have at least to update shift_state */
			compute_shiftstate();
		}
	}
}

static void put_queue(int ch)
{
	wake_up(&keypress_wait);
	if (tty) {
		tty_insert_flip_char(tty, ch, 0);
		tty_schedule_flip(tty);
	}
}

static void puts_queue(char *cp)
{
	wake_up(&keypress_wait);
	if (!tty)
		return;

	while (*cp) {
		tty_insert_flip_char(tty, *cp, 0);
		cp++;
	}
	tty_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)
{
	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 (pt_regs)
		show_regs(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);
	tty_schedule_flip(tty);
}

static void scroll_forw(void)
{
	scrollfront(0);
}

static void scroll_back(void)
{
	scrollback(0);
}

static void boot_it(void)
{
	extern int obp_system_intr(void);

	if (!obp_system_intr())
		ctrl_alt_del();
	/* sigh.. attempt to prevent multiple entry */
	last_keycode=1;
	rep = 0;
}

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)
{
	do_SAK(tty);
#if 0
	/*
	 * Need to fix SAK handling to fix up RAW/MEDIUM_RAW and
	 * vt_cons modes before we can enable RAW/MEDIUM_RAW SAK
	 * handling.
	 * 
	 * We should do this some day --- the whole point of a secure
	 * attention key is that it should be guaranteed to always
	 * work.
	 */
	reset_vc(fg_console);
	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;
	spec_fn_table[value]();
}

static void do_lowercase(unsigned char value, char up_flag)
{
	printk("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 };

/* If a dead key pressed twice, output a character corresponding to it,	*/
/* otherwise just remember the dead key.				*/

static void do_dead(unsigned char value, char up_flag)
{
	if (up_flag)
		return;

	value = ret_diacr[value];
	if (diacr == value) {   /* pressed twice */
		diacr = 0;
		put_queue(value);
		return;
	}
	diacr = value;
}


/* If space is pressed, return the character corresponding the pending	*/
/* dead key, otherwise try to combine the two.				*/

unsigned char handle_diacr(unsigned char ch)
{
	int d = diacr;
	int i;

	diacr = 0;
	if (ch == ' ')
		return d;

	for (i = 0; i < accent_table_size; i++) {
		if (accent_table[i].diacr == d && accent_table[i].base == ch)
			return accent_table[i].result;
	}

	put_queue(d);
	return ch;
}

static void do_cons(unsigned char value, char up_flag)
{
	if (up_flag)
		return;
	want_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("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 = "pqrstuvwxylSRQMnn?";

	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) {