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kbd.c revision 1.19 
      1 /*	$NetBSD: kbd.c,v 1.19 2002/09/06 13:18:43 gehenna Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Leo Weppelman
      5  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/device.h>
     40 #include <sys/ioctl.h>
     41 #include <sys/tty.h>
     42 #include <sys/proc.h>
     43 #include <sys/conf.h>
     44 #include <sys/file.h>
     45 #include <sys/kernel.h>
     46 #include <sys/signalvar.h>
     47 #include <sys/syslog.h>
     48 #include <dev/cons.h>
     49 #include <machine/cpu.h>
     50 #include <machine/iomap.h>
     51 #include <machine/mfp.h>
     52 #include <machine/acia.h>
     53 #include <atari/dev/itevar.h>
     54 #include <atari/dev/event_var.h>
     55 #include <atari/dev/vuid_event.h>
     56 #include <atari/dev/ym2149reg.h>
     57 #include <atari/dev/kbdreg.h>
     58 #include <atari/dev/kbdvar.h>
     59 #include <atari/dev/kbdmap.h>
     60 #include <atari/dev/msvar.h>
     61 
     62 #include "mouse.h"
     63 
     64 u_char			kbd_modifier;	/* Modifier mask		*/
     65 
     66 static u_char		kbd_ring[KBD_RING_SIZE];
     67 static volatile u_int	kbd_rbput = 0;	/* 'put' index			*/
     68 static u_int		kbd_rbget = 0;	/* 'get' index			*/
     69 static u_char		kbd_soft  = 0;	/* 1: Softint has been scheduled*/
     70 
     71 static struct kbd_softc kbd_softc;
     72 
     73 /* {b,c}devsw[] function prototypes */
     74 dev_type_open(kbdopen);
     75 dev_type_close(kbdclose);
     76 dev_type_read(kbdread);
     77 dev_type_ioctl(kbdioctl);
     78 dev_type_poll(kbdpoll);
     79 
     80 /* Interrupt handler */
     81 void	kbdintr __P((int));
     82 
     83 static void kbdsoft __P((void *, void *));
     84 static void kbdattach __P((struct device *, struct device *, void *));
     85 static int  kbdmatch __P((struct device *, struct cfdata *, void *));
     86 static int  kbd_do_modifier __P((u_char));
     87 static int  kbd_write_poll __P((u_char *, int));
     88 static void kbd_pkg_start __P((struct kbd_softc *, u_char));
     89 
     90 struct cfattach kbd_ca = {
     91 	sizeof(struct device), kbdmatch, kbdattach
     92 };
     93 
     94 const struct cdevsw kbd_cdevsw = {
     95 	kbdopen, kbdclose, kbdread, nowrite, kbdioctl,
     96 	nostop, notty, kbdpoll, nommap,
     97 };
     98 
     99 /*ARGSUSED*/
    100 static	int
    101 kbdmatch(pdp, cfp, auxp)
    102 struct	device	*pdp;
    103 struct	cfdata	*cfp;
    104 void		*auxp;
    105 {
    106 	if (!strcmp((char *)auxp, "kbd"))
    107 		return (1);
    108 	return (0);
    109 }
    110 
    111 /*ARGSUSED*/
    112 static void
    113 kbdattach(pdp, dp, auxp)
    114 struct	device *pdp, *dp;
    115 void	*auxp;
    116 {
    117 	int	timeout;
    118 	u_char	kbd_rst[]  = { 0x80, 0x01 };
    119 	u_char	kbd_icmd[] = { 0x12, 0x15 };
    120 
    121 	/*
    122 	 * Disable keyboard interrupts from MFP
    123 	 */
    124 	MFP->mf_ierb &= ~IB_AINT;
    125 
    126 	/*
    127 	 * Reset ACIA and intialize to:
    128 	 *    divide by 16, 8 data, 1 stop, no parity, enable RX interrupts
    129 	 */
    130 	KBD->ac_cs = A_RESET;
    131 	delay(100);	/* XXX: enough? */
    132 	KBD->ac_cs = kbd_softc.k_soft_cs = KBD_INIT | A_RXINT;
    133 
    134 	/*
    135 	 * Clear error conditions
    136 	 */
    137 	while (KBD->ac_cs & (A_IRQ|A_RXRDY))
    138 		timeout = KBD->ac_da;
    139 
    140 	/*
    141 	 * Now send the reset string, and read+ignore it's response
    142 	 */
    143 	if (!kbd_write_poll(kbd_rst, 2))
    144 		printf("kbd: error cannot reset keyboard\n");
    145 	for (timeout = 1000; timeout > 0; timeout--) {
    146 		if (KBD->ac_cs & (A_IRQ|A_RXRDY)) {
    147 			timeout = KBD->ac_da;
    148 			timeout = 100;
    149 		}
    150 		delay(100);
    151 	}
    152 	/*
    153 	 * Send init command: disable mice & joysticks
    154 	 */
    155 	kbd_write_poll(kbd_icmd, sizeof(kbd_icmd));
    156 
    157 	printf("\n");
    158 }
    159 
    160 void
    161 kbdenable()
    162 {
    163 	int	s, code;
    164 
    165 	s = spltty();
    166 
    167 	/*
    168 	 * Clear error conditions...
    169 	 */
    170 	while (KBD->ac_cs & (A_IRQ|A_RXRDY))
    171 		code = KBD->ac_da;
    172 	/*
    173 	 * Enable interrupts from MFP
    174 	 */
    175 	MFP->mf_iprb  = (u_int8_t)~IB_AINT;
    176 	MFP->mf_ierb |= IB_AINT;
    177 	MFP->mf_imrb |= IB_AINT;
    178 
    179 	kbd_softc.k_event_mode   = 0;
    180 	kbd_softc.k_events.ev_io = 0;
    181 	kbd_softc.k_pkg_size     = 0;
    182 	splx(s);
    183 }
    184 
    185 int kbdopen(dev_t dev, int flags, int mode, struct proc *p)
    186 {
    187 	if (kbd_softc.k_events.ev_io)
    188 		return EBUSY;
    189 
    190 	kbd_softc.k_events.ev_io = p;
    191 	ev_init(&kbd_softc.k_events);
    192 	return (0);
    193 }
    194 
    195 int
    196 kbdclose(dev_t dev, int flags, int mode, struct proc *p)
    197 {
    198 	/* Turn off event mode, dump the queue */
    199 	kbd_softc.k_event_mode = 0;
    200 	ev_fini(&kbd_softc.k_events);
    201 	kbd_softc.k_events.ev_io = NULL;
    202 	return (0);
    203 }
    204 
    205 int
    206 kbdread(dev_t dev, struct uio *uio, int flags)
    207 {
    208 	return ev_read(&kbd_softc.k_events, uio, flags);
    209 }
    210 
    211 int
    212 kbdioctl(dev_t dev,u_long cmd,register caddr_t data,int flag,struct proc *p)
    213 {
    214 	register struct kbd_softc *k = &kbd_softc;
    215 	struct kbdbell	*kb;
    216 
    217 	switch (cmd) {
    218 		case KIOCTRANS:
    219 			if (*(int *)data == TR_UNTRANS_EVENT)
    220 				return 0;
    221 			break;
    222 
    223 		case KIOCGTRANS:
    224 			/*
    225 			 * Get translation mode
    226 			 */
    227 			*(int *)data = TR_UNTRANS_EVENT;
    228 			return 0;
    229 
    230 		case KIOCSDIRECT:
    231 			k->k_event_mode = *(int *)data;
    232 			return 0;
    233 
    234 		case KIOCRINGBELL:
    235 			kb = (struct kbdbell *)data;
    236 			if (kb)
    237 				kbd_bell_sparms(kb->volume, kb->pitch,
    238 							kb->duration);
    239 			kbdbell();
    240 			return 0;
    241 
    242 		case FIONBIO:	/* we will remove this someday (soon???) */
    243 			return 0;
    244 
    245 		case FIOASYNC:
    246 			k->k_events.ev_async = *(int *)data != 0;
    247 				return 0;
    248 
    249 		case TIOCSPGRP:
    250 			if (*(int *)data != k->k_events.ev_io->p_pgid)
    251 				return EPERM;
    252 			return 0;
    253 
    254 		default:
    255 			return ENOTTY;
    256 	}
    257 
    258 	/*
    259 	 * We identified the ioctl, but we do not handle it.
    260 	 */
    261 	return EOPNOTSUPP;		/* misuse, but what the heck */
    262 }
    263 
    264 int
    265 kbdpoll (dev_t dev, int events, struct proc *p)
    266 {
    267   return ev_poll (&kbd_softc.k_events, events, p);
    268 }
    269 
    270 /*
    271  * Keyboard interrupt handler called straight from MFP at spl6.
    272  */
    273 void
    274 kbdintr(sr)
    275 int sr;	/* sr at time of interrupt	*/
    276 {
    277 	int	code;
    278 	int	got_char = 0;
    279 
    280 	/*
    281 	 * There may be multiple keys available. Read them all.
    282 	 */
    283 	while (KBD->ac_cs & (A_RXRDY|A_OE|A_PE)) {
    284 		got_char = 1;
    285 		if (KBD->ac_cs & (A_OE|A_PE)) {
    286 			code = KBD->ac_da;	/* Silently ignore errors */
    287 			continue;
    288 		}
    289 		kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da;
    290 	}
    291 
    292 	/*
    293 	 * If characters are waiting for transmit, send them.
    294 	 */
    295 	if ((kbd_softc.k_soft_cs & A_TXINT) && (KBD->ac_cs & A_TXRDY)) {
    296 		if (kbd_softc.k_sendp != NULL)
    297 			KBD->ac_da = *kbd_softc.k_sendp++;
    298 		if (--kbd_softc.k_send_cnt <= 0) {
    299 			/*
    300 			 * The total package has been transmitted,
    301 			 * wakeup anyone waiting for it.
    302 			 */
    303 			KBD->ac_cs = (kbd_softc.k_soft_cs &= ~A_TXINT);
    304 			kbd_softc.k_sendp    = NULL;
    305 			kbd_softc.k_send_cnt = 0;
    306 			wakeup((caddr_t)&kbd_softc.k_send_cnt);
    307 		}
    308 	}
    309 
    310 	/*
    311 	 * Activate software-level to handle possible input.
    312 	 */
    313 	if (got_char) {
    314 		if (!BASEPRI(sr)) {
    315 			if (!kbd_soft++)
    316 				add_sicallback(kbdsoft, 0, 0);
    317 		} else {
    318 			spl1();
    319 			kbdsoft(NULL, NULL);
    320 		}
    321 	}
    322 }
    323 
    324 /*
    325  * Keyboard soft interrupt handler
    326  */
    327 void
    328 kbdsoft(junk1, junk2)
    329 void	*junk1, *junk2;
    330 {
    331 	int			s;
    332 	u_char			code;
    333 	struct kbd_softc	*k = &kbd_softc;
    334 	struct firm_event	*fe;
    335 	int			put;
    336 	int			n, get;
    337 
    338 	kbd_soft = 0;
    339 	get      = kbd_rbget;
    340 
    341 	for (;;) {
    342 		n = kbd_rbput;
    343 		if (get == n) /* We're done	*/
    344 			break;
    345 		n -= get;
    346 		if (n > KBD_RING_SIZE) { /* Ring buffer overflow	*/
    347 			get += n - KBD_RING_SIZE;
    348 			n    = KBD_RING_SIZE;
    349 		}
    350 		while (--n >= 0) {
    351 			code = kbd_ring[get++ & KBD_RING_MASK];
    352 
    353 			/*
    354 			 * If collecting a package, stuff it in and
    355 			 * continue.
    356 			 */
    357 			if (k->k_pkg_size && (k->k_pkg_idx < k->k_pkg_size)) {
    358 			    k->k_package[k->k_pkg_idx++] = code;
    359 			    if (k->k_pkg_idx == k->k_pkg_size) {
    360 				/*
    361 				 * Package is complete.
    362 				 */
    363 				switch(k->k_pkg_type) {
    364 #if NMOUSE > 0
    365 				    case KBD_AMS_PKG:
    366 				    case KBD_RMS_PKG:
    367 				    case KBD_JOY1_PKG:
    368 			 		mouse_soft((REL_MOUSE *)k->k_package,
    369 						k->k_pkg_size, k->k_pkg_type);
    370 #endif /* NMOUSE */
    371 				}
    372 				k->k_pkg_size = 0;
    373 			    }
    374 			    continue;
    375 			}
    376 			/*
    377 			 * If this is a package header, init pkg. handling.
    378 			 */
    379 			if (!KBD_IS_KEY(code)) {
    380 				kbd_pkg_start(k, code);
    381 				continue;
    382 			}
    383 			if (kbd_do_modifier(code) && !k->k_event_mode)
    384 				continue;
    385 
    386 			/*
    387 			 * if not in event mode, deliver straight to ite to
    388 			 * process key stroke
    389 			 */
    390 			if (!k->k_event_mode) {
    391 				/* Gets to spltty() by itself	*/
    392 				ite_filter(code, ITEFILT_TTY);
    393 				continue;
    394 			}
    395 
    396 			/*
    397 			 * Keyboard is generating events.  Turn this keystroke
    398 			 * into an event and put it in the queue.  If the queue
    399 			 * is full, the keystroke is lost (sorry!).
    400 			 */
    401 			s = spltty();
    402 			put = k->k_events.ev_put;
    403 			fe  = &k->k_events.ev_q[put];
    404 			put = (put + 1) % EV_QSIZE;
    405 			if (put == k->k_events.ev_get) {
    406 				log(LOG_WARNING,
    407 					"keyboard event queue overflow\n");
    408 				splx(s);
    409 				continue;
    410 			}
    411 			fe->id    = KBD_SCANCODE(code);
    412 			fe->value = KBD_RELEASED(code) ? VKEY_UP : VKEY_DOWN;
    413 			fe->time  = time;
    414 			k->k_events.ev_put = put;
    415 			EV_WAKEUP(&k->k_events);
    416 			splx(s);
    417 		}
    418 		kbd_rbget = get;
    419 	}
    420 }
    421 
    422 static	u_char sound[] = {
    423 	0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00,
    424 	0xF8,0x10,0x10,0x10,0x00,0x20,0x03
    425 };
    426 
    427 void
    428 kbdbell()
    429 {
    430 	register int	i, sps;
    431 
    432 	sps = splhigh();
    433 	for (i = 0; i < sizeof(sound); i++) {
    434 		YM2149->sd_selr = i;
    435 		YM2149->sd_wdat = sound[i];
    436 	}
    437 	splx(sps);
    438 }
    439 
    440 
    441 /*
    442  * Set the parameters of the 'default' beep.
    443  */
    444 
    445 #define KBDBELLCLOCK	125000	/* 2MHz / 16 */
    446 #define KBDBELLDURATION	128	/* 256 / 2MHz */
    447 
    448 void
    449 kbd_bell_gparms(volume, pitch, duration)
    450 	u_int	*volume, *pitch, *duration;
    451 {
    452 	u_int	tmp;
    453 
    454 	tmp = sound[11] | (sound[12] << 8);
    455 	*duration = (tmp * KBDBELLDURATION) / 1000;
    456 
    457 	tmp = sound[0] | (sound[1] << 8);
    458 	*pitch = KBDBELLCLOCK / tmp;
    459 
    460 	*volume = 0;
    461 }
    462 
    463 void
    464 kbd_bell_sparms(volume, pitch, duration)
    465 	u_int	volume, pitch, duration;
    466 {
    467 	u_int	f, t;
    468 
    469 	f = pitch > 10 ? pitch : 10;	/* minimum pitch */
    470 	if (f > 20000)
    471 		f = 20000;		/* maximum pitch */
    472 
    473 	f = KBDBELLCLOCK / f;
    474 
    475 	t = (duration * 1000) / KBDBELLDURATION;
    476 
    477 	sound[ 0] = f & 0xff;
    478 	sound[ 1] = (f >> 8) & 0xf;
    479 	f -= 1;
    480 	sound[ 2] = f & 0xff;
    481 	sound[ 3] = (f >> 8) & 0xf;
    482 	f += 2;
    483 	sound[ 4] = f & 0xff;
    484 	sound[ 5] = (f >> 8) & 0xf;
    485 
    486 	sound[11] = t & 0xff;
    487 	sound[12] = (t >> 8) & 0xff;
    488 
    489 	sound[13] = 0x03;
    490 }
    491 
    492 int
    493 kbdgetcn()
    494 {
    495 	u_char	code;
    496 	int	s = spltty();
    497 	int	ints_active;
    498 
    499 	ints_active = 0;
    500 	if (MFP->mf_imrb & IB_AINT) {
    501 		ints_active   = 1;
    502 		MFP->mf_imrb &= ~IB_AINT;
    503 	}
    504 	for (;;) {
    505 		while (!((KBD->ac_cs & (A_IRQ|A_RXRDY)) == (A_IRQ|A_RXRDY)))
    506 			;	/* Wait for key	*/
    507 		if (KBD->ac_cs & (A_OE|A_PE)) {
    508 			code = KBD->ac_da;	/* Silently ignore errors */
    509 			continue;
    510 		}
    511 		code = KBD->ac_da;
    512 		if (!kbd_do_modifier(code))
    513 			break;
    514 	}
    515 
    516 	if (ints_active) {
    517 		MFP->mf_iprb  = (u_int8_t)~IB_AINT;
    518 		MFP->mf_imrb |=  IB_AINT;
    519 	}
    520 
    521 	splx (s);
    522 	return code;
    523 }
    524 
    525 /*
    526  * Write a command to the keyboard in 'polled' mode.
    527  */
    528 static int
    529 kbd_write_poll(cmd, len)
    530 u_char	*cmd;
    531 int	len;
    532 {
    533 	int	timeout;
    534 
    535 	while (len-- > 0) {
    536 		KBD->ac_da = *cmd++;
    537 		for (timeout = 100; !(KBD->ac_cs & A_TXRDY); timeout--)
    538 			delay(10);
    539 		if (!(KBD->ac_cs & A_TXRDY))
    540 			return (0);
    541 	}
    542 	return (1);
    543 }
    544 
    545 /*
    546  * Write a command to the keyboard. Return when command is send.
    547  */
    548 void
    549 kbd_write(cmd, len)
    550 u_char	*cmd;
    551 int	len;
    552 {
    553 	struct kbd_softc	*k = &kbd_softc;
    554 	int			sps;
    555 
    556 	/*
    557 	 * Get to splhigh, 'real' interrupts arrive at spl6!
    558 	 */
    559 	sps = splhigh();
    560 
    561 	/*
    562 	 * Make sure any privious write has ended...
    563 	 */
    564 	while (k->k_sendp != NULL)
    565 		tsleep((caddr_t)&k->k_sendp, TTOPRI, "kbd_write1", 0);
    566 
    567 	/*
    568 	 * If the KBD-acia is not currently busy, send the first
    569 	 * character now.
    570 	 */
    571 	KBD->ac_cs = (k->k_soft_cs |= A_TXINT);
    572 	if (KBD->ac_cs & A_TXRDY) {
    573 		KBD->ac_da = *cmd++;
    574 		len--;
    575 	}
    576 
    577 	/*
    578 	 * If we're not yet done, wait until all characters are send.
    579 	 */
    580 	if (len > 0) {
    581 		k->k_sendp    = cmd;
    582 		k->k_send_cnt = len;
    583 		tsleep((caddr_t)&k->k_send_cnt, TTOPRI, "kbd_write2", 0);
    584 	}
    585 	splx(sps);
    586 
    587 	/*
    588 	 * Wakeup all procs waiting for us.
    589 	 */
    590 	wakeup((caddr_t)&k->k_sendp);
    591 }
    592 
    593 /*
    594  * Setup softc-fields to assemble a keyboard package.
    595  */
    596 static void
    597 kbd_pkg_start(kp, msg_start)
    598 struct kbd_softc *kp;
    599 u_char		 msg_start;
    600 {
    601 	kp->k_pkg_idx    = 1;
    602 	kp->k_package[0] = msg_start;
    603 	switch (msg_start) {
    604 		case 0xf6:
    605 			kp->k_pkg_type = KBD_MEM_PKG;
    606 			kp->k_pkg_size = 8;
    607 			break;
    608 		case 0xf7:
    609 			kp->k_pkg_type = KBD_AMS_PKG;
    610 			kp->k_pkg_size = 6;
    611 			break;
    612 		case 0xf8:
    613 		case 0xf9:
    614 		case 0xfa:
    615 		case 0xfb:
    616 			kp->k_pkg_type = KBD_RMS_PKG;
    617 			kp->k_pkg_size = 3;
    618 			break;
    619 		case 0xfc:
    620 			kp->k_pkg_type = KBD_CLK_PKG;
    621 			kp->k_pkg_size = 7;
    622 			break;
    623 		case 0xfe:
    624 			kp->k_pkg_type = KBD_JOY0_PKG;
    625 			kp->k_pkg_size = 2;
    626 			break;
    627 		case 0xff:
    628 			kp->k_pkg_type = KBD_JOY1_PKG;
    629 			kp->k_pkg_size = 2;
    630 			break;
    631 		default:
    632 			printf("kbd: Unknown packet 0x%x\n", msg_start);
    633 			break;
    634 	}
    635 }
    636 
    637 /*
    638  * Modifier processing
    639  */
    640 static int
    641 kbd_do_modifier(code)
    642 u_char	code;
    643 {
    644 	u_char	up, mask;
    645 
    646 	up   = KBD_RELEASED(code);
    647 	mask = 0;
    648 
    649 	switch(KBD_SCANCODE(code)) {
    650 		case KBD_LEFT_SHIFT:
    651 			mask = KBD_MOD_LSHIFT;
    652 			break;
    653 		case KBD_RIGHT_SHIFT:
    654 			mask = KBD_MOD_RSHIFT;
    655 			break;
    656 		case KBD_CTRL:
    657 			mask = KBD_MOD_CTRL;
    658 			break;
    659 		case KBD_ALT:
    660 			mask = KBD_MOD_ALT;
    661 			break;
    662 		case KBD_CAPS_LOCK:
    663 			/* CAPSLOCK is a toggle */
    664 			if(!up)
    665 				kbd_modifier ^= KBD_MOD_CAPS;
    666 			return 1;
    667 	}
    668 	if(mask) {
    669 		if(up)
    670 			kbd_modifier &= ~mask;
    671 		else
    672 			kbd_modifier |= mask;
    673 		return 1;
    674 	}
    675 	return 0;
    676 }
    677