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pms.c revision 1.24 
      1 /* $NetBSD: pms.c,v 1.24 2008/02/29 06:42:35 dyoung Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2004 Kentaro Kurahone.
      5  * Copyright (c) 2004 Ales Krenek.
      6  * Copyright (c) 1994 Charles M. Hannum.
      7  * Copyright (c) 1992, 1993 Erik Forsberg.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
     19  * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     23  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     24  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: pms.c,v 1.24 2008/02/29 06:42:35 dyoung Exp $");
     30 
     31 #include "opt_pms.h"
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 #include <sys/ioctl.h>
     37 #include <sys/kernel.h>
     38 #include <sys/kthread.h>
     39 
     40 #include <sys/bus.h>
     41 
     42 #include <dev/pckbport/pckbportvar.h>
     43 #ifdef PMS_SYNAPTICS_TOUCHPAD
     44 #include <dev/pckbport/synapticsvar.h>
     45 #endif
     46 
     47 #include <dev/pckbport/pmsreg.h>
     48 #include <dev/pckbport/pmsvar.h>
     49 
     50 
     51 #include <dev/wscons/wsconsio.h>
     52 #include <dev/wscons/wsmousevar.h>
     53 
     54 #ifdef PMSDEBUG
     55 int pmsdebug = 1;
     56 #define DPRINTF(x)      if (pmsdebug) printf x
     57 #else
     58 #define DPRINTF(x)
     59 #endif
     60 
     61 const enum pms_type tries[] = {
     62 	PMS_SCROLL5, PMS_SCROLL3, PMS_STANDARD, PMS_UNKNOWN
     63 };
     64 
     65 const struct pms_protocol pms_protocols[] = {
     66 	{ { 0, 0, 0 }, 0, "unknown protocol" },
     67 	{ { 0, 0, 0 }, 0, "no scroll wheel (3 buttons)" },
     68 	{ { 200, 100, 80 }, 3, "scroll wheel (3 buttons)" },
     69 	{ { 200, 200, 80 }, 4, "scroll wheel (5 buttons)" },
     70 	{ { 0, 0, 0 }, 0, "synaptics" }
     71 };
     72 
     73 
     74 int pmsprobe(struct device *, struct cfdata *, void *);
     75 void pmsattach(struct device *, struct device *, void *);
     76 void pmsinput(void *, int);
     77 
     78 CFATTACH_DECL(pms, sizeof(struct pms_softc),
     79     pmsprobe, pmsattach, NULL, NULL);
     80 
     81 static int	pms_protocol(pckbport_tag_t, pckbport_slot_t);
     82 static void	do_enable(struct pms_softc *);
     83 static void	do_disable(struct pms_softc *);
     84 static void	pms_reset_thread(void*);
     85 int	pms_enable(void *);
     86 int	pms_ioctl(void *, u_long, void *, int, struct lwp *);
     87 void	pms_disable(void *);
     88 
     89 static bool	pms_suspend(device_t PMF_FN_PROTO);
     90 static bool	pms_resume(device_t PMF_FN_PROTO);
     91 
     92 const struct wsmouse_accessops pms_accessops = {
     93 	pms_enable,
     94 	pms_ioctl,
     95 	pms_disable,
     96 };
     97 
     98 static int
     99 pms_protocol(pckbport_tag_t tag, pckbport_slot_t slot)
    100 {
    101 	u_char cmd[2], resp[1];
    102 	int i, j, res;
    103 	const struct pms_protocol *p;
    104 
    105 	for (j = 0; j < sizeof(tries) / sizeof(tries[0]); ++j) {
    106 		p = &pms_protocols[tries[j]];
    107 		if (!p->rates[0])
    108 			break;
    109 		cmd[0] = PMS_SET_SAMPLE;
    110 		for (i = 0; i < 3; i++) {
    111 			cmd[1] = p->rates[i];
    112 			res = pckbport_enqueue_cmd(tag, slot, cmd, 2, 0, 1, 0);
    113 			if (res)
    114 				return PMS_STANDARD;
    115 		}
    116 
    117 		cmd[0] = PMS_SEND_DEV_ID;
    118 		res = pckbport_enqueue_cmd(tag, slot, cmd, 1, 1, 1, resp);
    119 		if (res)
    120 			return PMS_UNKNOWN;
    121 		if (resp[0] == p->response) {
    122 			DPRINTF(("pms_protocol: found mouse protocol %d\n",
    123 				tries[j]));
    124 			return tries[j];
    125 		}
    126 	}
    127 	DPRINTF(("pms_protocol: standard PS/2 protocol (no scroll wheel)\n"));
    128 	return PMS_STANDARD;
    129 }
    130 
    131 int
    132 pmsprobe(struct device *parent, struct cfdata *match,
    133     void *aux)
    134 {
    135 	struct pckbport_attach_args *pa = aux;
    136 	u_char cmd[1], resp[2];
    137 	int res;
    138 
    139 	if (pa->pa_slot != PCKBPORT_AUX_SLOT)
    140 		return 0;
    141 
    142 	/* Flush any garbage. */
    143 	pckbport_flush(pa->pa_tag, pa->pa_slot);
    144 
    145 	/* reset the device */
    146 	cmd[0] = PMS_RESET;
    147 	res = pckbport_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
    148 	if (res) {
    149 #ifdef DEBUG
    150 		printf("pmsprobe: reset error %d\n", res);
    151 #endif
    152 		return 0;
    153 	}
    154 	if (resp[0] != PMS_RSTDONE) {
    155 		printf("pmsprobe: reset response 0x%x\n", resp[0]);
    156 		return 0;
    157 	}
    158 
    159 	/* get type number (0 = mouse) */
    160 	if (resp[1] != 0) {
    161 #ifdef DEBUG
    162 		printf("pmsprobe: type 0x%x\n", resp[1]);
    163 #endif
    164 		return 0;
    165 	}
    166 
    167 	return 10;
    168 }
    169 
    170 void
    171 pmsattach(struct device *parent, struct device *self, void *aux)
    172 {
    173 	struct pms_softc *sc = device_private(self);
    174 	struct pckbport_attach_args *pa = aux;
    175 	struct wsmousedev_attach_args a;
    176 	u_char cmd[2], resp[2];
    177 	int res;
    178 
    179 	sc->sc_kbctag = pa->pa_tag;
    180 	sc->sc_kbcslot = pa->pa_slot;
    181 
    182 	aprint_naive("\n");
    183 	aprint_normal("\n");
    184 
    185 	/* Flush any garbage. */
    186 	pckbport_flush(pa->pa_tag, pa->pa_slot);
    187 
    188 	/* reset the device */
    189 	cmd[0] = PMS_RESET;
    190 	res = pckbport_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
    191 #ifdef DEBUG
    192 	if (res || resp[0] != PMS_RSTDONE || resp[1] != 0) {
    193 		aprint_error("pmsattach: reset error\n");
    194 		return;
    195 	}
    196 #endif
    197 	sc->inputstate = 0;
    198 	sc->buttons = 0;
    199 	sc->protocol = PMS_UNKNOWN;
    200 
    201 #ifdef PMS_SYNAPTICS_TOUCHPAD
    202 	/* Probe for synaptics touchpad. */
    203 	if (pms_synaptics_probe_init(sc) == 0) {
    204 		sc->protocol = PMS_SYNAPTICS;
    205 	} else
    206 #endif
    207 		/* Install generic handler. */
    208 		pckbport_set_inputhandler(sc->sc_kbctag, sc->sc_kbcslot,
    209 		    pmsinput, sc, sc->sc_dev.dv_xname);
    210 
    211 	a.accessops = &pms_accessops;
    212 	a.accesscookie = sc;
    213 
    214 	/*
    215 	 * Attach the wsmouse, saving a handle to it.
    216 	 * Note that we don't need to check this pointer against NULL
    217 	 * here or in pmsintr, because if this fails pms_enable() will
    218 	 * never be called, so pmsinput() will never be called.
    219 	 */
    220 	sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
    221 
    222 	/* no interrupts until enabled */
    223 	cmd[0] = PMS_DEV_DISABLE;
    224 	res = pckbport_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 0, 0, 0);
    225 	if (res)
    226 		aprint_error("pmsattach: disable error\n");
    227 	pckbport_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
    228 
    229 	kthread_create(PRI_NONE, 0, NULL, pms_reset_thread, sc,
    230 	    &sc->sc_event_thread, sc->sc_dev.dv_xname);
    231 
    232 #ifndef PMS_DISABLE_POWERHOOK
    233 	sc->sc_suspended = 0;
    234 #endif
    235 	if (!pmf_device_register(self, pms_suspend, pms_resume))
    236 		aprint_error_dev(self, "couldn't establish power handler\n");
    237 }
    238 
    239 static void
    240 do_enable(struct pms_softc *sc)
    241 {
    242 	u_char cmd[2];
    243 	int res;
    244 
    245 	sc->inputstate = 0;
    246 	sc->buttons = 0;
    247 
    248 	pckbport_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 1);
    249 
    250 #ifdef PMS_SYNAPTICS_TOUCHPAD
    251 	if (sc->protocol == PMS_SYNAPTICS)
    252 		pms_synaptics_enable(sc);
    253 #endif
    254 
    255 	cmd[0] = PMS_DEV_ENABLE;
    256 	res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd,
    257 	    1, 0, 1, 0);
    258 	if (res)
    259 		aprint_error("pms_enable: command error %d\n", res);
    260 
    261 	if (sc->protocol == PMS_UNKNOWN)
    262 		sc->protocol = pms_protocol(sc->sc_kbctag, sc->sc_kbcslot);
    263 	DPRINTF(("pms_enable: using %s protocol\n",
    264 	    pms_protocols[sc->protocol].name));
    265 #if 0
    266 	{
    267 		u_char scmd[2];
    268 
    269 		scmd[0] = PMS_SET_RES;
    270 		scmd[1] = 3; /* 8 counts/mm */
    271 		res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
    272 		    2, 0, 1, 0);
    273 		if (res)
    274 			printf("pms_enable: setup error1 (%d)\n", res);
    275 
    276 		scmd[0] = PMS_SET_SCALE21;
    277 		res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
    278 		    1, 0, 1, 0);
    279 		if (res)
    280 			printf("pms_enable: setup error2 (%d)\n", res);
    281 
    282 		scmd[0] = PMS_SET_SAMPLE;
    283 		scmd[1] = 100; /* 100 samples/sec */
    284 		res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
    285 		    2, 0, 1, 0);
    286 		if (res)
    287 			printf("pms_enable: setup error3 (%d)\n", res);
    288 	}
    289 #endif
    290 }
    291 
    292 static void
    293 do_disable(struct pms_softc *sc)
    294 {
    295 	u_char cmd[1];
    296 	int res;
    297 
    298 	cmd[0] = PMS_DEV_DISABLE;
    299 	res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd,
    300 	    1, 0, 1, 0);
    301 	if (res)
    302 		aprint_error("pms_disable: command error\n");
    303 
    304 	pckbport_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
    305 }
    306 
    307 int
    308 pms_enable(void *v)
    309 {
    310 	struct pms_softc *sc = v;
    311 	int s;
    312 
    313 	if (sc->sc_enabled)
    314 		return EBUSY;
    315 
    316 	do_enable(sc);
    317 
    318 	s = spltty();
    319 	sc->sc_enabled = 1;
    320 	splx(s);
    321 
    322 	return 0;
    323 }
    324 
    325 void
    326 pms_disable(void *v)
    327 {
    328 	struct pms_softc *sc = v;
    329 	int s;
    330 
    331 	do_disable(sc);
    332 
    333 	s = spltty();
    334 	sc->sc_enabled = 0;
    335 	splx(s);
    336 }
    337 
    338 static bool
    339 pms_suspend(device_t dv PMF_FN_ARGS)
    340 {
    341 	struct pms_softc *sc = device_private(dv);
    342 
    343 	if (sc->sc_enabled)
    344 		do_disable(sc);
    345 
    346 	return true;
    347 }
    348 
    349 static bool
    350 pms_resume(device_t dv PMF_FN_ARGS)
    351 {
    352 	struct pms_softc *sc = device_private(dv);
    353 
    354 #ifdef PMS_SYNAPTICS_TOUCHPAD
    355 	if (sc->protocol == PMS_SYNAPTICS) {
    356 		pms_synaptics_resume(sc);
    357 		if (sc->sc_enabled) {
    358 			do_enable(sc);
    359 		}
    360 	} else
    361 #endif
    362 	if (sc->sc_enabled) {
    363 		/* recheck protocol & init mouse */
    364 		sc->protocol = PMS_UNKNOWN;
    365 		do_enable(sc); /* only if we were suspended */
    366 	}
    367 
    368 	return true;
    369 }
    370 
    371 int
    372 pms_ioctl(void *v, u_long cmd, void *data, int flag,
    373     struct lwp *l)
    374 {
    375 	struct pms_softc *sc = v;
    376 	u_char kbcmd[2];
    377 	int i;
    378 
    379 	switch (cmd) {
    380 	case WSMOUSEIO_GTYPE:
    381 		*(u_int *)data = WSMOUSE_TYPE_PS2;
    382 		break;
    383 
    384 	case WSMOUSEIO_SRES:
    385 		i = (*(u_int *)data - 12) / 25;
    386 
    387 		if (i < 0)
    388 			i = 0;
    389 
    390 		if (i > 3)
    391 			i = 3;
    392 
    393 		kbcmd[0] = PMS_SET_RES;
    394 		kbcmd[1] = i;
    395 		i = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, kbcmd,
    396 		    2, 0, 1, 0);
    397 
    398 		if (i)
    399 			printf("pms_ioctl: SET_RES command error\n");
    400 		break;
    401 
    402 	default:
    403 		return EPASSTHROUGH;
    404 	}
    405 	return 0;
    406 }
    407 
    408 static void
    409 pms_reset_thread(void *arg)
    410 {
    411 	struct pms_softc *sc = arg;
    412 	u_char cmd[1], resp[2];
    413 	int res;
    414 	int save_protocol;
    415 
    416 	for (;;) {
    417 		tsleep(&sc->sc_enabled, PWAIT, "pmsreset", 0);
    418 #ifdef PMSDEBUG
    419 		if (pmsdebug)
    420 #endif
    421 #if defined(PMSDEBUG) || defined(DIAGNOSTIC)
    422 			printf("%s: resetting mouse interface\n",
    423 			    sc->sc_dev.dv_xname);
    424 #endif
    425 		save_protocol = sc->protocol;
    426 		pms_disable(sc);
    427 		cmd[0] = PMS_RESET;
    428 		res = pckbport_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd,
    429 		    1, 2, 1, resp);
    430 		if (res) {
    431 			DPRINTF(("%s: reset error %d\n", sc->sc_dev.dv_xname,
    432 			    res));
    433 		}
    434 
    435 #ifdef PMS_SYNAPTICS_TOUCHPAD
    436 		/* For the synaptics case, leave the protocol alone. */
    437 		if (sc->protocol != PMS_SYNAPTICS)
    438 #endif
    439 			sc->protocol = PMS_UNKNOWN;
    440 
    441 		pms_enable(sc);
    442 		if (sc->protocol != save_protocol) {
    443 #if defined(PMSDEBUG) || defined(DIAGNOSTIC)
    444 			printf("%s: protocol change, sleeping and retrying\n",
    445 			    sc->sc_dev.dv_xname);
    446 #endif
    447 			pms_disable(sc);
    448 			cmd[0] = PMS_RESET;
    449 			res = pckbport_enqueue_cmd(sc->sc_kbctag,
    450 			    sc->sc_kbcslot, cmd, 1, 2, 1, resp);
    451 			if (res) {
    452 				DPRINTF(("%s: reset error %d\n",
    453 				    sc->sc_dev.dv_xname, res));
    454 			}
    455 			tsleep(pms_reset_thread, PWAIT, "pmsreset", hz);
    456 			cmd[0] = PMS_RESET;
    457 			res = pckbport_enqueue_cmd(sc->sc_kbctag,
    458 			    sc->sc_kbcslot, cmd, 1, 2, 1, resp);
    459 			if (res) {
    460 				DPRINTF(("%s: reset error %d\n",
    461 				    sc->sc_dev.dv_xname, res));
    462 			}
    463 			sc->protocol = PMS_UNKNOWN;	/* reprobe protocol */
    464 			pms_enable(sc);
    465 #if defined(PMSDEBUG) || defined(DIAGNOSTIC)
    466 			if (sc->protocol != save_protocol) {
    467 				printf("%s: protocol changed.\n",
    468 				    sc->sc_dev.dv_xname);
    469 			}
    470 #endif
    471 		}
    472 	}
    473 }
    474 
    475 /* Masks for the first byte of a packet */
    476 #define PMS_LBUTMASK 0x01
    477 #define PMS_RBUTMASK 0x02
    478 #define PMS_MBUTMASK 0x04
    479 #define PMS_4BUTMASK 0x10
    480 #define PMS_5BUTMASK 0x20
    481 
    482 void
    483 pmsinput(void *vsc, int data)
    484 {
    485 	struct pms_softc *sc = vsc;
    486 	u_int changed;
    487 	int dx, dy, dz = 0;
    488 	int newbuttons = 0;
    489 
    490 	if (!sc->sc_enabled) {
    491 		/* Interrupts are not expected.	 Discard the byte. */
    492 		return;
    493 	}
    494 
    495 	getmicrouptime(&sc->current);
    496 
    497 	if (sc->inputstate > 0) {
    498 		struct timeval diff;
    499 
    500 		timersub(&sc->current, &sc->last, &diff);
    501 		/*
    502 		 * Empirically, the delay should be about 1700us on a standard
    503 		 * PS/2 port.  I have seen delays as large as 4500us (rarely)
    504 		 * in regular use.  When using a confused mouse, I generally
    505 		 * see delays at least as large as 30,000us.  -seebs
    506 		 *
    507 		 * The thinkpad trackball returns at 22-23ms. So we use
    508 		 * >= 40ms. In the future, I'll implement adaptable timeout
    509 		 * by increasing the timeout if the mouse reset happens
    510 		 * too frequently -christos
    511 		 */
    512 		if (diff.tv_sec > 0 || diff.tv_usec >= 40000) {
    513 			DPRINTF(("pms_input: unusual delay (%ld.%06ld s), "
    514 			    "scheduling reset\n",
    515 			    (long)diff.tv_sec, (long)diff.tv_usec));
    516 			sc->inputstate = 0;
    517 			sc->sc_enabled = 0;
    518 			wakeup(&sc->sc_enabled);
    519 			return;
    520 		}
    521 	}
    522 	sc->last = sc->current;
    523 
    524 	if (sc->inputstate == 0) {
    525 		/*
    526 		 * Some devices (seen on trackballs anytime, and on
    527 		 * some mice shortly after reset) output garbage bytes
    528 		 * between packets.  Just ignore them.
    529 		 */
    530 		if ((data & 0xc0) != 0)
    531 			return;	/* not in sync yet, discard input */
    532 	}
    533 
    534 	sc->packet[sc->inputstate++] = data & 0xff;
    535 	switch (sc->inputstate) {
    536 	case 0:
    537 		/* no useful processing can be done yet */
    538 		break;
    539 
    540 	case 1:
    541 		/*
    542 		 * Why should we test for bit 0x8 and insist on it here?
    543 		 * The old (psm.c and psm_intelli.c) drivers didn't do
    544 		 * it, and there are devices where it does harm (that's
    545 		 * why it is not used if using PMS_STANDARD protocol).
    546 		 * Anyway, it does not to cause any harm to accept packets
    547 		 * without this bit.
    548 		 */
    549 #if 0
    550 		if (sc->protocol == PMS_STANDARD)
    551 			break;
    552 		if (!(sc->packet[0] & 0x8)) {
    553 			DPRINTF(("pmsinput: 0x8 not set in first byte "
    554 			    "[0x%02x], resetting\n", sc->packet[0]));
    555 			sc->inputstate = 0;
    556 			sc->sc_enabled = 0;
    557 			wakeup(&sc->sc_enabled);
    558 			return;
    559 		}
    560 #endif
    561 		break;
    562 
    563 	case 2:
    564 		break;
    565 
    566 	case 4:
    567 		/* Case 4 is a superset of case 3. This is *not* an accident. */
    568 		if (sc->protocol == PMS_SCROLL3) {
    569 			dz = sc->packet[3];
    570 			if (dz >= 128)
    571 				dz -= 256;
    572 			if (dz == -128)
    573 				dz = -127;
    574 		} else if (sc->protocol == PMS_SCROLL5) {
    575 			dz = sc->packet[3] & 0xf;
    576 			if (dz >= 8)
    577 				dz -= 16;
    578                 	if (sc->packet[3] & PMS_4BUTMASK)
    579 				newbuttons |= 0x8;
    580                 	if (sc->packet[3] & PMS_5BUTMASK)
    581 				newbuttons |= 0x10;
    582 		} else {
    583 			DPRINTF(("pmsinput: why am I looking at this byte?\n"));
    584 			dz = 0;
    585 		}
    586 		/* FALLTHROUGH */
    587 	case 3:
    588 		/*
    589 		 * This is only an endpoint for scroll protocols with 4
    590 		 * bytes, or the standard protocol with 3.
    591 		 */
    592 		if (sc->protocol != PMS_STANDARD && sc->inputstate == 3)
    593 			break;
    594 
    595 		newbuttons |= ((sc->packet[0] & PMS_LBUTMASK) ? 0x1 : 0) |
    596 		    ((sc->packet[0] & PMS_MBUTMASK) ? 0x2 : 0) |
    597 		    ((sc->packet[0] & PMS_RBUTMASK) ? 0x4 : 0);
    598 
    599 		dx = sc->packet[1];
    600 		if (dx >= 128)
    601 			dx -= 256;
    602 		if (dx == -128)
    603 			dx = -127;
    604 
    605 		dy = sc->packet[2];
    606 		if (dy >= 128)
    607 			dy -= 256;
    608 		if (dy == -128)
    609 			dy = -127;
    610 
    611 		sc->inputstate = 0;
    612 		changed = (sc->buttons ^ newbuttons);
    613 		sc->buttons = newbuttons;
    614 
    615 #ifdef PMSDEBUG
    616 		if (sc->protocol == PMS_STANDARD) {
    617 			DPRINTF(("pms: packet: 0x%02x%02x%02x\n",
    618 			    sc->packet[0], sc->packet[1], sc->packet[2]));
    619 		} else {
    620 			DPRINTF(("pms: packet: 0x%02x%02x%02x%02x\n",
    621 			    sc->packet[0], sc->packet[1], sc->packet[2],
    622 			    sc->packet[3]));
    623 		}
    624 #endif
    625 		if (dx || dy || dz || changed) {
    626 #ifdef PMSDEBUG
    627 			DPRINTF(("pms: x %+03d y %+03d z %+03d "
    628 			    "buttons 0x%02x\n",	dx, dy, dz, sc->buttons));
    629 #endif
    630 			wsmouse_input(sc->sc_wsmousedev,
    631 			    sc->buttons, dx, dy, dz, 0,
    632 			    WSMOUSE_INPUT_DELTA);
    633 		}
    634 		memset(sc->packet, 0, 4);
    635 		break;
    636 
    637 	/* If we get here, we have problems. */
    638 	default:
    639 		printf("pmsinput: very confused.  resetting.\n");
    640 		sc->inputstate = 0;
    641 		sc->sc_enabled = 0;
    642 		wakeup(&sc->sc_enabled);
    643 		return;
    644 	}
    645 }
    646