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ucbtp.c revision 1.21
      1 /*	$NetBSD: ucbtp.c,v 1.21 2012/10/27 17:17:53 chs Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      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  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Device driver for PHILIPS UCB1200 Advanced modem/audio analog front-end
     34  *	Touch panel part.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: ucbtp.c,v 1.21 2012/10/27 17:17:53 chs Exp $");
     39 
     40 #include "opt_use_poll.h"
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/device.h>
     45 
     46 #include <machine/bus.h>
     47 #include <machine/intr.h>
     48 #include <machine/bootinfo.h> /* bootinfo */
     49 
     50 #include <dev/wscons/wsconsio.h>
     51 #include <dev/wscons/wsmousevar.h>
     52 
     53 #include <dev/hpc/hpctpanelvar.h>
     54 
     55 #include <hpcmips/tx/tx39var.h>
     56 #include <hpcmips/tx/tx39sibvar.h>
     57 #include <hpcmips/tx/tx39sibreg.h>
     58 #include <hpcmips/tx/tx39icureg.h>
     59 
     60 #include <hpcmips/dev/ucb1200var.h>
     61 #include <hpcmips/dev/ucb1200reg.h>
     62 
     63 #include <hpcmips/tx/txsnd.h>
     64 #include <dev/hpc/video_subr.h> /* debug */
     65 
     66 #ifdef UCBTPDEBUG
     67 int	ucbtp_debug = 0;
     68 #define	DPRINTF(arg) if (ucbtp_debug) printf arg;
     69 #define	DPRINTFN(n, arg) if (ucbtp_debug > (n)) printf arg;
     70 #else
     71 #define	DPRINTF(arg)
     72 #define DPRINTFN(n, arg)
     73 #endif
     74 
     75 enum ucbts_stat {
     76 	UCBTS_STAT_DISABLE,
     77 	UCBTS_STAT_RELEASE,
     78 	UCBTS_STAT_TOUCH,
     79 	UCBTS_STAT_DRAG,
     80 };
     81 
     82 #define UCBTS_POSX	1
     83 #define UCBTS_POSY	2
     84 #define UCBTS_PRESS	3
     85 
     86 #define UCBTS_PRESS_THRESHOLD	80
     87 #define UCBTS_TAP_THRESHOLD	5
     88 
     89 enum ucbadc_state {
     90 /* 0 */	UCBADC_IDLE,
     91 /* 1 */	UCBADC_ADC_INIT,
     92 /* 2 */	UCBADC_ADC_FINI,
     93 /* 3 */	UCBADC_MEASUMENT_INIT,
     94 /* 4 */	UCBADC_MEASUMENT_FINI,
     95 /* 5 */	UCBADC_ADC_ENABLE,
     96 /* 6 */	UCBADC_ADC_START0,
     97 /* 7 */	UCBADC_ADC_START1,
     98 /* 8 */	UCBADC_ADC_DATAREAD,
     99 /* 9 */	UCBADC_ADC_DATAREAD_WAIT,
    100 /*10 */	UCBADC_ADC_DISABLE,
    101 /*11 */	UCBADC_ADC_INTRMODE,
    102 /*12 */	UCBADC_ADC_INPUT,
    103 /*13 */	UCBADC_INTR_ACK0,
    104 /*14 */	UCBADC_INTR_ACK1,
    105 /*15 */	UCBADC_INTR_ACK2,
    106 /*16 */	UCBADC_REGREAD,
    107 /*17 */	UCBADC_REGWRITE
    108 };
    109 
    110 struct ucbtp_softc {
    111 	device_t sc_dev;
    112 	device_t sc_sib; /* parent (TX39 SIB module) */
    113 	device_t sc_ucb; /* parent (UCB1200 module) */
    114 	tx_chipset_tag_t sc_tc;
    115 
    116 	enum ucbts_stat sc_stat;
    117 	int sc_polling;
    118 	int sc_polling_finish;
    119 	void *sc_pollh;
    120 
    121 	struct tpcalib_softc sc_tpcalib;
    122 	int sc_calibrated;
    123 
    124 	/* measurement value */
    125 	int sc_x, sc_y, sc_p;
    126 	int sc_ox, sc_oy;
    127 	int sc_xy_reverse; /* some platform pin connect interchanged */
    128 
    129 	/*
    130 	 * touch panel state machine
    131 	 */
    132 	void *sm_ih; /* TX39 SIB subframe 0 interrupt handler */
    133 
    134 	int sm_addr; /* UCB1200 register address */
    135 	u_int32_t sm_reg;  /* UCB1200 register data & TX39 SIB header */
    136 	int sm_tmpreg;
    137 #define UCBADC_RETRY_DEFAULT		200
    138 	int sm_retry; /* retry counter */
    139 
    140 	enum ucbadc_state sm_state;
    141 	int		sm_measurement; /* X, Y, Pressure */
    142 #define	UCBADC_MEASUREMENT_X		0
    143 #define	UCBADC_MEASUREMENT_Y		1
    144 #define	UCBADC_MEASUREMENT_PRESSURE	2
    145 	int sm_returnstate;
    146 
    147 	int sm_read_state, sm_write_state;
    148 	int sm_writing;	/* writing state flag */
    149 	u_int32_t sm_write_val;	/* temporary buffer */
    150 
    151 	int sm_rw_retry; /* retry counter for r/w */
    152 
    153 	/* wsmouse */
    154 	device_t sc_wsmousedev;
    155 };
    156 
    157 int	ucbtp_match(device_t, cfdata_t, void *);
    158 void	ucbtp_attach(device_t, device_t, void *);
    159 
    160 int	ucbtp_sibintr(void *);
    161 int	ucbtp_poll(void *);
    162 int	ucbtp_adc_async(void *);
    163 int	ucbtp_input(struct ucbtp_softc *);
    164 int	ucbtp_busy(void *);
    165 
    166 int	ucbtp_enable(void *);
    167 int	ucbtp_ioctl(void *, u_long, void *, int, struct lwp *);
    168 void	ucbtp_disable(void *);
    169 
    170 CFATTACH_DECL_NEW(ucbtp, sizeof(struct ucbtp_softc),
    171     ucbtp_match, ucbtp_attach, NULL, NULL);
    172 
    173 const struct wsmouse_accessops ucbtp_accessops = {
    174 	ucbtp_enable,
    175 	ucbtp_ioctl,
    176 	ucbtp_disable,
    177 };
    178 
    179 /*
    180  * XXX currently no calibration method. this is temporary hack.
    181  */
    182 #include <machine/platid.h>
    183 
    184 struct	wsmouse_calibcoords *calibration_sample_lookup(void);
    185 int	ucbtp_calibration(struct ucbtp_softc *);
    186 
    187 struct calibration_sample_table {
    188 	platid_t	cst_platform;
    189 	struct wsmouse_calibcoords cst_sample;
    190 } calibration_sample_table[] = {
    191 	{{{PLATID_WILD, PLATID_MACH_COMPAQ_C_8XX}},  /* uch machine */
    192 	 { 0, 0, 639, 239, 5,
    193 	   {{ 507, 510, 320, 120 },
    194 	    { 898, 757,  40,  40 },
    195 	    { 900, 255,  40, 200 },
    196 	    { 109, 249, 600, 200 },
    197 	    { 110, 753, 600,  40 }}}},
    198 
    199 	{{{PLATID_WILD, PLATID_MACH_COMPAQ_C_2010}}, /* uch machine */
    200 	 { 0, 0, 639, 239, 5,
    201 	   {{ 506, 487, 320, 120 },
    202 	    { 880, 250,  40,  40 },
    203 	    { 880, 718,  40, 200 },
    204 	    { 140, 726, 600, 200 },
    205 	    { 137, 250, 600,  40 }}}},
    206 
    207 	{{{PLATID_WILD, PLATID_MACH_SHARP_MOBILON_HC4100}}, /* uch machine */
    208 	 { 0, 0, 639, 239, 5,
    209 	   {{ 497, 501, 320, 120 },
    210 	    { 752, 893,  40,  40 },
    211 	    { 242, 891,  40, 200 },
    212 	    { 241, 115, 600, 200 },
    213 	    { 747, 101, 600,  40 }}}},
    214 
    215 	{{{PLATID_WILD, PLATID_MACH_SHARP_TELIOS_HCVJ}}, /* uch machine */
    216 	 { 0, 0, 799, 479, 5,
    217 	   {{ 850, 150,   1,   1 },
    218 	    { 850, 880,   1, 479 },
    219 	    { 850, 880,   1, 479 },
    220 	    {  85, 880, 799, 479 },
    221 	    {  85, 150, 799,   1 }}}},
    222 
    223 	{{{PLATID_UNKNOWN, PLATID_UNKNOWN}},
    224 	 { 0, 0, 639, 239, 5,
    225 	   {{0, 0, 0, 0},
    226 	    {0, 0, 0, 0},
    227 	    {0, 0, 0, 0},
    228 	    {0, 0, 0, 0},
    229 	    {0, 0, 0, 0}}}},
    230 };
    231 
    232 struct wsmouse_calibcoords *
    233 calibration_sample_lookup(void)
    234 {
    235 	struct calibration_sample_table *tab;
    236 	platid_mask_t mask;
    237 
    238 	for (tab = calibration_sample_table;
    239 	    tab->cst_platform.dw.dw1 != PLATID_UNKNOWN; tab++) {
    240 
    241 		mask = PLATID_DEREF(&tab->cst_platform);
    242 
    243 		if (platid_match(&platid, &mask)) {
    244 			return (&tab->cst_sample);
    245 		}
    246 	}
    247 
    248 	return (0);
    249 }
    250 
    251 int
    252 ucbtp_calibration(struct ucbtp_softc *sc)
    253 {
    254 	struct wsmouse_calibcoords *cs;
    255 
    256 	if (sc->sc_tc->tc_videot)
    257 		video_calibration_pattern(sc->sc_tc->tc_videot); /* debug */
    258 
    259 	tpcalib_init(&sc->sc_tpcalib);
    260 
    261 	if (!(cs = calibration_sample_lookup())) {
    262 		DPRINTF(("no calibration data"));
    263 		return (1);
    264 	}
    265 
    266 	sc->sc_calibrated =
    267 	    tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS,
    268 		(void *)cs, 0, 0) == 0 ? 1 : 0;
    269 
    270 	if (!sc->sc_calibrated)
    271 		printf("not ");
    272 	printf("calibrated");
    273 
    274 	return (0);
    275 }
    276 
    277 int
    278 ucbtp_match(device_t parent, cfdata_t cf, void *aux)
    279 {
    280 
    281 	return (1);
    282 }
    283 
    284 void
    285 ucbtp_attach(device_t parent, device_t self, void *aux)
    286 {
    287 	struct ucb1200_attach_args *ucba = aux;
    288 	struct ucbtp_softc *sc = device_private(self);
    289 	struct wsmousedev_attach_args wsmaa;
    290 	tx_chipset_tag_t tc;
    291 
    292 	sc->sc_dev = self;
    293 	tc = sc->sc_tc = ucba->ucba_tc;
    294 	sc->sc_sib = ucba->ucba_sib;
    295 	sc->sc_ucb = ucba->ucba_ucb;
    296 
    297 	printf(": ");
    298 	/* touch panel interrupt */
    299 	tx_intr_establish(tc, MAKEINTR(1, TX39_INTRSTATUS1_SIBIRQPOSINT),
    300 	    IST_EDGE, IPL_TTY, ucbtp_sibintr, sc);
    301 
    302 	/* attempt to calibrate touch panel */
    303 	ucbtp_calibration(sc);
    304 #ifdef TX392X /* hack for Telios HC-VJ1C */
    305 	sc->sc_xy_reverse = 1;
    306 #endif
    307 
    308 	printf("\n");
    309 
    310 	wsmaa.accessops = &ucbtp_accessops;
    311 	wsmaa.accesscookie = sc;
    312 
    313 	ucb1200_state_install(parent, ucbtp_busy, self, UCB1200_TP_MODULE);
    314 
    315 	/*
    316 	 * attach the wsmouse
    317 	 */
    318 	sc->sc_wsmousedev = config_found(self, &wsmaa, wsmousedevprint);
    319 }
    320 
    321 int
    322 ucbtp_busy(void *arg)
    323 {
    324 	struct ucbtp_softc *sc = arg;
    325 
    326 	return (sc->sm_state != UCBADC_IDLE);
    327 }
    328 
    329 int
    330 ucbtp_poll(void *arg)
    331 {
    332 	struct ucbtp_softc *sc = arg;
    333 
    334 	if (!ucb1200_state_idle(sc->sc_ucb)) /* subframe0 busy */
    335 		return (POLL_CONT);
    336 
    337 	if (sc->sc_polling_finish) {
    338 		sc->sc_polling_finish = 0;
    339 		return (POLL_END);
    340 	}
    341 
    342 	/* execute A-D converter */
    343 	sc->sm_state = UCBADC_ADC_INIT;
    344 	ucbtp_adc_async(sc);
    345 
    346 	return (POLL_CONT);
    347 }
    348 
    349 int
    350 ucbtp_sibintr(void *arg)
    351 {
    352 	struct ucbtp_softc *sc = arg;
    353 
    354 	sc->sc_stat = UCBTS_STAT_TOUCH;
    355 
    356 	/* click! */
    357 	tx_sound_click(sc->sc_tc);
    358 
    359 	/* invoke touch panel polling */
    360 	if (!sc->sc_polling) {
    361 		sc->sc_pollh = tx39_poll_establish(sc->sc_tc, 1, IST_EDGE,
    362 		    ucbtp_poll, sc);
    363 		if (!sc->sc_pollh) {
    364 			printf("%s: can't poll\n", device_xname(sc->sc_dev));
    365 		}
    366 	}
    367 
    368 	/* don't acknoledge interrupt until polling finish */
    369 
    370 	return (0);
    371 }
    372 
    373 #define REGWRITE(addr, reg, ret) (					\
    374 	sc->sm_addr = (addr),						\
    375 	sc->sm_reg = (reg),						\
    376 	sc->sm_returnstate = (ret),					\
    377 	sc->sm_state = UCBADC_REGWRITE)
    378 #define REGREAD(addr, ret) (						\
    379 	sc->sm_addr = (addr),						\
    380 	sc->sm_returnstate = (ret),					\
    381 	sc->sm_state = UCBADC_REGREAD)
    382 
    383 int
    384 ucbtp_adc_async(void *arg)
    385 {
    386 	struct ucbtp_softc *sc = arg;
    387 	tx_chipset_tag_t tc = sc->sc_tc;
    388 	txreg_t reg;
    389 	u_int16_t reg16;
    390 
    391 	DPRINTFN(9, ("state: %d\n", sc->sm_state));
    392 
    393 	switch (sc->sm_state) {
    394 	default:
    395 		panic("ucbtp_adc: invalid state %d", sc->sm_state);
    396 		/* NOTREACHED */
    397 		break;
    398 
    399 	case UCBADC_IDLE:
    400 		/* nothing to do */
    401 		break;
    402 
    403 	case UCBADC_ADC_INIT:
    404 		sc->sc_polling++;
    405 		sc->sc_stat = UCBTS_STAT_DRAG;
    406 		/* enable heart beat of this state machine */
    407 		sc->sm_ih = tx_intr_establish(
    408 			tc,
    409 			MAKEINTR(1, TX39_INTRSTATUS1_SIBSF0INT),
    410 			IST_EDGE, IPL_TTY, ucbtp_adc_async, sc);
    411 
    412 		sc->sm_state = UCBADC_MEASUMENT_INIT;
    413 		break;
    414 
    415 	case UCBADC_ADC_FINI:
    416 		/* disable heart beat of this state machine */
    417 		tx_intr_disestablish(tc, sc->sm_ih);
    418 		sc->sm_state = UCBADC_IDLE;
    419 		break;
    420 
    421 	case UCBADC_MEASUMENT_INIT:
    422 		switch (sc->sm_measurement) {
    423 		default:
    424 			panic("unknown measurement spec.");
    425 			/* NOTREACHED */
    426 			break;
    427 		case UCBADC_MEASUREMENT_X:
    428 			REGWRITE(UCB1200_TSCTRL_REG,
    429 			    UCB1200_TSCTRL_XPOSITION,
    430 			    UCBADC_ADC_ENABLE);
    431 			break;
    432 		case UCBADC_MEASUREMENT_Y:
    433 			REGWRITE(UCB1200_TSCTRL_REG,
    434 			    UCB1200_TSCTRL_YPOSITION,
    435 			    UCBADC_ADC_ENABLE);
    436 			break;
    437 		case UCBADC_MEASUREMENT_PRESSURE:
    438 			REGWRITE(UCB1200_TSCTRL_REG,
    439 			    UCB1200_TSCTRL_PRESSURE,
    440 			    UCBADC_ADC_ENABLE);
    441 			break;
    442 		}
    443 		break;
    444 
    445 	case UCBADC_MEASUMENT_FINI:
    446 		switch (sc->sm_measurement) {
    447 		case UCBADC_MEASUREMENT_X:
    448 			sc->sm_measurement = UCBADC_MEASUREMENT_Y;
    449 			sc->sm_state = UCBADC_MEASUMENT_INIT;
    450 			break;
    451 		case UCBADC_MEASUREMENT_Y:
    452 			sc->sm_measurement = UCBADC_MEASUREMENT_PRESSURE;
    453 			sc->sm_state = UCBADC_MEASUMENT_INIT;
    454 			break;
    455 		case UCBADC_MEASUREMENT_PRESSURE:
    456 			sc->sm_measurement = UCBADC_MEASUREMENT_X;
    457 			/* measurement complete. pass down to wsmouse_input */
    458 			sc->sm_state = UCBADC_ADC_INPUT;
    459 			break;
    460 		}
    461 		break;
    462 
    463 	case UCBADC_ADC_ENABLE:
    464 		switch (sc->sm_measurement) {
    465 		case UCBADC_MEASUREMENT_PRESSURE:
    466 			/* FALLTHROUGH */
    467 		case UCBADC_MEASUREMENT_X:
    468 			sc->sm_tmpreg = UCB1200_ADCCTRL_INPUT_SET(
    469 				UCB1200_ADCCTRL_ENABLE,
    470 				UCB1200_ADCCTRL_INPUT_TSPX);
    471 			REGWRITE(UCB1200_ADCCTRL_REG, sc->sm_tmpreg,
    472 			    UCBADC_ADC_START0);
    473 			break;
    474 		case UCBADC_MEASUREMENT_Y:
    475 			sc->sm_tmpreg = UCB1200_ADCCTRL_INPUT_SET(
    476 				UCB1200_ADCCTRL_ENABLE,
    477 				UCB1200_ADCCTRL_INPUT_TSPY);
    478 			REGWRITE(UCB1200_ADCCTRL_REG, sc->sm_tmpreg,
    479 			    UCBADC_ADC_START0);
    480 			break;
    481 		}
    482 		break;
    483 
    484 	case UCBADC_ADC_START0:
    485 		REGWRITE(UCB1200_ADCCTRL_REG,
    486 		    sc->sm_tmpreg | UCB1200_ADCCTRL_START,
    487 		    UCBADC_ADC_START1);
    488 		break;
    489 
    490 	case UCBADC_ADC_START1:
    491 		REGWRITE(UCB1200_ADCCTRL_REG,
    492 		    sc->sm_tmpreg,
    493 		    UCBADC_ADC_DATAREAD);
    494 		sc->sm_retry = UCBADC_RETRY_DEFAULT;
    495 		break;
    496 
    497 	case UCBADC_ADC_DATAREAD:
    498 		REGREAD(UCB1200_ADCDATA_REG, UCBADC_ADC_DATAREAD_WAIT);
    499 		break;
    500 
    501 	case UCBADC_ADC_DATAREAD_WAIT:
    502 		reg16 = TX39_SIBSF0_REGDATA(sc->sm_reg);
    503 		if (!(reg16 & UCB1200_ADCDATA_INPROGRESS) &&
    504 		    --sc->sm_retry > 0) {
    505 			sc->sm_state = UCBADC_ADC_DATAREAD;
    506 		} else {
    507 			if (sc->sm_retry <= 0) {
    508 				printf("dataread failed\n");
    509 				sc->sm_state = UCBADC_ADC_FINI;
    510 				break;
    511 			}
    512 
    513 			switch (sc->sm_measurement) {
    514 			case UCBADC_MEASUREMENT_X:
    515 				sc->sc_x = UCB1200_ADCDATA(reg16);
    516 				DPRINTFN(9, ("x=%d\n", sc->sc_x));
    517 				break;
    518 			case UCBADC_MEASUREMENT_Y:
    519 				sc->sc_y = UCB1200_ADCDATA(reg16);
    520 				DPRINTFN(9, ("y=%d\n", sc->sc_y));
    521 				break;
    522 			case UCBADC_MEASUREMENT_PRESSURE:
    523 				sc->sc_p = UCB1200_ADCDATA(reg16);
    524 				DPRINTFN(9, ("p=%d\n", sc->sc_p));
    525 				break;
    526 			}
    527 
    528 			sc->sm_state = UCBADC_ADC_DISABLE;
    529 		}
    530 
    531 		break;
    532 
    533 	case UCBADC_ADC_DISABLE:
    534 		REGWRITE(UCB1200_ADCCTRL_REG, 0, UCBADC_ADC_INTRMODE);
    535 
    536 		break;
    537 	case UCBADC_ADC_INTRMODE:
    538 		REGWRITE(UCB1200_TSCTRL_REG, UCB1200_TSCTRL_INTERRUPT,
    539 		    UCBADC_MEASUMENT_FINI);
    540 		break;
    541 
    542 	case UCBADC_ADC_INPUT:
    543 		if (ucbtp_input(sc) == 0)
    544 			sc->sm_state = UCBADC_ADC_FINI;
    545 		else
    546 			sc->sm_state = UCBADC_INTR_ACK0;
    547 		break;
    548 
    549 	case UCBADC_INTR_ACK0:
    550 		REGREAD(UCB1200_INTSTAT_REG, UCBADC_INTR_ACK1);
    551 		break;
    552 
    553 	case UCBADC_INTR_ACK1:
    554 		REGWRITE(UCB1200_INTSTAT_REG, sc->sm_reg, UCBADC_INTR_ACK2);
    555 		break;
    556 
    557 	case UCBADC_INTR_ACK2:
    558 		sc->sc_polling_finish = 1;
    559 		REGWRITE(UCB1200_INTSTAT_REG, 0, UCBADC_ADC_FINI);
    560 		break;
    561 
    562 		/*
    563 		 * UCB1200 register access state
    564 		 */
    565 	case UCBADC_REGREAD:
    566 		/*
    567 		 * In	: sc->sm_addr
    568 		 * Out	: sc->sm_reg  (with SIBtag)
    569 		 */
    570 #define TXSIB_REGREAD_INIT	0
    571 #define TXSIB_REGREAD_READ	1
    572 		switch (sc->sm_read_state) {
    573 		case TXSIB_REGREAD_INIT:
    574 			reg = TX39_SIBSF0_REGADDR_SET(0, sc->sm_addr);
    575 			tx_conf_write(tc, TX39_SIBSF0CTRL_REG, reg);
    576 			sc->sm_rw_retry = UCBADC_RETRY_DEFAULT;
    577 			sc->sm_read_state = TXSIB_REGREAD_READ;
    578 			break;
    579 		case TXSIB_REGREAD_READ:
    580 			reg = tx_conf_read(tc, TX39_SIBSF0STAT_REG);
    581 			if ((TX39_SIBSF0_REGADDR(reg) != sc->sm_addr) &&
    582 			    --sc->sm_rw_retry > 0) {
    583 				break;
    584 			}
    585 
    586 			if (sc->sm_rw_retry <= 0) {
    587 				printf("sf0read: command failed\n");
    588 				sc->sm_state = UCBADC_ADC_FINI;
    589 			} else {
    590 				sc->sm_reg = reg;
    591 				sc->sm_read_state = TXSIB_REGREAD_INIT;
    592 				DPRINTFN(9, ("%08x\n", reg));
    593 				if (sc->sm_writing)
    594 					sc->sm_state = UCBADC_REGWRITE;
    595 				else
    596 					sc->sm_state = sc->sm_returnstate;
    597 			}
    598 			break;
    599 		}
    600 		break;
    601 
    602 	case UCBADC_REGWRITE:
    603 		/*
    604 		 * In	: sc->sm_addr, sc->sm_reg (lower 16bit only)
    605 		 */
    606 #define TXSIB_REGWRITE_INIT	0
    607 #define TXSIB_REGWRITE_WRITE	1
    608 		switch (sc->sm_write_state) {
    609 		case TXSIB_REGWRITE_INIT:
    610 			sc->sm_writing = 1;
    611 			sc->sm_write_state = TXSIB_REGWRITE_WRITE;
    612 			sc->sm_state = UCBADC_REGREAD;
    613 
    614 			sc->sm_write_val = sc->sm_reg;
    615 			break;
    616 		case TXSIB_REGWRITE_WRITE:
    617 			sc->sm_writing = 0;
    618 			sc->sm_write_state = TXSIB_REGWRITE_INIT;
    619 			sc->sm_state = sc->sm_returnstate;
    620 
    621 			reg = sc->sm_reg;
    622 			reg |= TX39_SIBSF0_WRITE;
    623 			TX39_SIBSF0_REGDATA_CLR(reg);
    624 			reg = TX39_SIBSF0_REGDATA_SET(reg, sc->sm_write_val);
    625 			tx_conf_write(tc, TX39_SIBSF0CTRL_REG, reg);
    626 			break;
    627 		}
    628 		break;
    629 	}
    630 
    631 	return (0);
    632 }
    633 
    634 int
    635 ucbtp_input(struct ucbtp_softc *sc)
    636 {
    637 	int rx, ry, x, y, p;
    638 
    639 	rx = sc->sc_x;
    640 	ry = sc->sc_y;
    641 	p = sc->sc_p;
    642 
    643 	if (!sc->sc_calibrated) {
    644 		DPRINTFN(2, ("x=%4d y=%4d p=%4d\n", rx, ry, p));
    645 		DPRINTF(("ucbtp_input: no calibration data\n"));
    646 	}
    647 
    648 	if (p < UCBTS_PRESS_THRESHOLD || rx == 0x3ff || ry == 0x3ff ||
    649 	    rx == 0 || ry == 0) {
    650 		sc->sc_stat = UCBTS_STAT_RELEASE;
    651 		if (sc->sc_polling < UCBTS_TAP_THRESHOLD) {
    652 			DPRINTFN(2, ("TAP!\n"));
    653 			/* button 0 DOWN */
    654 			wsmouse_input(sc->sc_wsmousedev, 1, 0, 0, 0, 0, 0);
    655 			/* button 0 UP */
    656 			wsmouse_input(sc->sc_wsmousedev, 0, 0, 0, 0, 0, 0);
    657 		} else {
    658 			wsmouse_input(sc->sc_wsmousedev, 0,
    659 			    sc->sc_ox, sc->sc_oy, 0, 0,
    660 			    WSMOUSE_INPUT_ABSOLUTE_X |
    661 			    WSMOUSE_INPUT_ABSOLUTE_Y);
    662 
    663 			DPRINTFN(2, ("RELEASE\n"));
    664 		}
    665 		sc->sc_polling = 0;
    666 
    667 		return (1);
    668 	}
    669 
    670 	if (sc->sc_xy_reverse)
    671 		tpcalib_trans(&sc->sc_tpcalib, ry, rx, &x, &y);
    672 	else
    673 		tpcalib_trans(&sc->sc_tpcalib, rx, ry, &x, &y);
    674 
    675 	DPRINTFN(2, ("x: %4d->%4d y: %4d->%4d pressure=%4d\n",
    676 	    rx, x, ry, y, p));
    677 
    678 	/* debug draw */
    679 	if (sc->sc_tc->tc_videot) {
    680 		if (sc->sc_polling == 1)
    681 			video_dot(sc->sc_tc->tc_videot, x, y);
    682 		else
    683 			video_line(sc->sc_tc->tc_videot, sc->sc_ox,
    684 			    sc->sc_oy, x, y);
    685 	}
    686 
    687 	sc->sc_ox = x, sc->sc_oy = y;
    688 
    689 	wsmouse_input(sc->sc_wsmousedev, 1, x, y, 0, 0,
    690 	    WSMOUSE_INPUT_ABSOLUTE_X | WSMOUSE_INPUT_ABSOLUTE_Y);
    691 
    692 	return (0);
    693 }
    694 
    695 /*
    696  * access ops.
    697  */
    698 
    699 int
    700 ucbtp_enable(void *v)
    701 {
    702 	/* not yet */
    703 	return (0);
    704 }
    705 
    706 void
    707 ucbtp_disable(void *v)
    708 {
    709 	/* not yet */
    710 }
    711 
    712 int
    713 ucbtp_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
    714 {
    715 	struct ucbtp_softc *sc = v;
    716 
    717 	DPRINTF(("%s(%d): ucbtp_ioctl(%08lx)\n", __FILE__, __LINE__, cmd));
    718 
    719 	switch (cmd) {
    720 	case WSMOUSEIO_SRES:
    721 		printf("%s(%d): WSMOUSRIO_SRES is not supported",
    722 		    __FILE__, __LINE__);
    723 		break;
    724 
    725 	default:
    726 		return hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, l);
    727 	}
    728 
    729 	return 0;
    730 }
    731