keyboard.c

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

}

static void decr_console(void)
{
}

static void incr_console(void)
{
}

static void send_intr(void)
{
}

static void scroll_forw(void)
{
}

static void scroll_back(void)
{
}

static void boot_it(void)
{
   printk( "boot_it() " );
   rtemsReboot();
}

static void compose(void)
{
	dead_key_next = 1;
}

int spawnpid, spawnsig;

static void spawn_console(void)
{
}

static void SAK(void)
{
}

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)
{
}

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];
   printk( " do_dead( %X ) ", 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;
}

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 = "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(plain_map[k]);
		if(KTYP(sym) == KT_SHIFT) {
		  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)
{
	if (up_flag || rep)
		return;

  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. Not yet
 * used, but this allows for easy and efficient race-condition
 * prevention later on.
 */
static void kbd_bh(void)
{
	unsigned char leds = getleds();
	if (leds != ledstate) {
		ledstate = leds;
		kbd_leds(leds);
	}
}


void set_leds(void)
{
  kbd_bh();
}


int kbd_init(void)
{

	int i;
	struct kbd_struct kbd0;
	kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS;
   kbd0.ledmode = LED_SHOW_MEM;
	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;

	kbd_init_hw();
	mark_bh(KEYBOARD_BH);
	return 0;
}