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      1 /*	$NetBSD: ucbtp.c,v 1.24 2023/09/10 15:18:51 andvar 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 1.24 2023/09/10 15:18:51 andvar 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 #define DPRINTF_ENABLE
     68 #define DPRINTF_DEBUG	ucbtp_debug
     69 #endif
     70 #include <machine/debug.h>
     71 
     72 enum ucbts_stat {
     73 	UCBTS_STAT_DISABLE,
     74 	UCBTS_STAT_RELEASE,
     75 	UCBTS_STAT_TOUCH,
     76 	UCBTS_STAT_DRAG,
     77 };
     78 
     79 #define UCBTS_POSX	1
     80 #define UCBTS_POSY	2
     81 #define UCBTS_PRESS	3
     82 
     83 #define UCBTS_PRESS_THRESHOLD	80
     84 #define UCBTS_TAP_THRESHOLD	5
     85 
     86 enum ucbadc_state {
     87 /* 0 */	UCBADC_IDLE,
     88 /* 1 */	UCBADC_ADC_INIT,
     89 /* 2 */	UCBADC_ADC_FINI,
     90 /* 3 */	UCBADC_MEASUMENT_INIT,
     91 /* 4 */	UCBADC_MEASUMENT_FINI,
     92 /* 5 */	UCBADC_ADC_ENABLE,
     93 /* 6 */	UCBADC_ADC_START0,
     94 /* 7 */	UCBADC_ADC_START1,
     95 /* 8 */	UCBADC_ADC_DATAREAD,
     96 /* 9 */	UCBADC_ADC_DATAREAD_WAIT,
     97 /*10 */	UCBADC_ADC_DISABLE,
     98 /*11 */	UCBADC_ADC_INTRMODE,
     99 /*12 */	UCBADC_ADC_INPUT,
    100 /*13 */	UCBADC_INTR_ACK0,
    101 /*14 */	UCBADC_INTR_ACK1,
    102 /*15 */	UCBADC_INTR_ACK2,
    103 /*16 */	UCBADC_REGREAD,
    104 /*17 */	UCBADC_REGWRITE
    105 };
    106 
    107 struct ucbtp_softc {
    108 	device_t sc_dev;
    109 	device_t sc_sib; /* parent (TX39 SIB module) */
    110 	device_t sc_ucb; /* parent (UCB1200 module) */
    111 	tx_chipset_tag_t sc_tc;
    112 
    113 	enum ucbts_stat sc_stat;
    114 	int sc_polling;
    115 	int sc_polling_finish;
    116 	void *sc_pollh;
    117 
    118 	struct tpcalib_softc sc_tpcalib;
    119 	int sc_calibrated;
    120 
    121 	/* measurement value */
    122 	int sc_x, sc_y, sc_p;
    123 	int sc_ox, sc_oy;
    124 	int sc_xy_reverse; /* some platform pin connect interchanged */
    125 
    126 	/*
    127 	 * touch panel state machine
    128 	 */
    129 	void *sm_ih; /* TX39 SIB subframe 0 interrupt handler */
    130 
    131 	int sm_addr; /* UCB1200 register address */
    132 	u_int32_t sm_reg;  /* UCB1200 register data & TX39 SIB header */
    133 	int sm_tmpreg;
    134 #define UCBADC_RETRY_DEFAULT		200
    135 	int sm_retry; /* retry counter */
    136 
    137 	enum ucbadc_state sm_state;
    138 	int		sm_measurement; /* X, Y, Pressure */
    139 #define	UCBADC_MEASUREMENT_X		0
    140 #define	UCBADC_MEASUREMENT_Y		1
    141 #define	UCBADC_MEASUREMENT_PRESSURE	2
    142 	int sm_returnstate;
    143 
    144 	int sm_read_state, sm_write_state;
    145 	int sm_writing;	/* writing state flag */
    146 	u_int32_t sm_write_val;	/* temporary buffer */
    147 
    148 	int sm_rw_retry; /* retry counter for r/w */
    149 
    150 	/* wsmouse */
    151 	device_t sc_wsmousedev;
    152 };
    153 
    154 int	ucbtp_match(device_t, cfdata_t, void *);
    155 void	ucbtp_attach(device_t, device_t, void *);
    156 
    157 int	ucbtp_sibintr(void *);
    158 int	ucbtp_poll(void *);
    159 int	ucbtp_adc_async(void *);
    160 int	ucbtp_input(struct ucbtp_softc *);
    161 int	ucbtp_busy(void *);
    162 
    163 int	ucbtp_enable(void *);
    164 int	ucbtp_ioctl(void *, u_long, void *, int, struct lwp *);
    165 void	ucbtp_disable(void *);
    166 
    167 CFATTACH_DECL_NEW(ucbtp, sizeof(struct ucbtp_softc),
    168     ucbtp_match, ucbtp_attach, NULL, NULL);
    169 
    170 const struct wsmouse_accessops ucbtp_accessops = {
    171 	ucbtp_enable,
    172 	ucbtp_ioctl,
    173 	ucbtp_disable,
    174 };
    175 
    176 /*
    177  * XXX currently no calibration method. this is temporary hack.
    178  */
    179 #include <machine/platid.h>
    180 
    181 struct	wsmouse_calibcoords *calibration_sample_lookup(void);
    182 int	ucbtp_calibration(struct ucbtp_softc *);
    183 
    184 struct calibration_sample_table {
    185 	platid_t	cst_platform;
    186 	struct wsmouse_calibcoords cst_sample;
    187 } calibration_sample_table[] = {
    188 	{{{PLATID_WILD, PLATID_MACH_COMPAQ_C_8XX}},  /* uch machine */
    189 	 { 0, 0, 639, 239, 5,
    190 	   {{ 507, 510, 320, 120 },
    191 	    { 898, 757,  40,  40 },
    192 	    { 900, 255,  40, 200 },
    193 	    { 109, 249, 600, 200 },
    194 	    { 110, 753, 600,  40 }}}},
    195 
    196 	{{{PLATID_WILD, PLATID_MACH_COMPAQ_C_2010}}, /* uch machine */
    197 	 { 0, 0, 639, 239, 5,
    198 	   {{ 506, 487, 320, 120 },
    199 	    { 880, 250,  40,  40 },
    200 	    { 880, 718,  40, 200 },
    201 	    { 140, 726, 600, 200 },
    202 	    { 137, 250, 600,  40 }}}},
    203 
    204 	{{{PLATID_WILD, PLATID_MACH_SHARP_MOBILON_HC4100}}, /* uch machine */
    205 	 { 0, 0, 639, 239, 5,
    206 	   {{ 497, 501, 320, 120 },
    207 	    { 752, 893,  40,  40 },
    208 	    { 242, 891,  40, 200 },
    209 	    { 241, 115, 600, 200 },
    210 	    { 747, 101, 600,  40 }}}},
    211 
    212 	{{{PLATID_WILD, PLATID_MACH_SHARP_TELIOS_HCVJ}}, /* uch machine */
    213 	 { 0, 0, 799, 479, 5,
    214 	   {{ 850, 150,   1,   1 },
    215 	    { 850, 880,   1, 479 },
    216 	    { 850, 880,   1, 479 },
    217 	    {  85, 880, 799, 479 },
    218 	    {  85, 150, 799,   1 }}}},
    219 
    220 	{{{PLATID_UNKNOWN, PLATID_UNKNOWN}},
    221 	 { 0, 0, 639, 239, 5,
    222 	   {{0, 0, 0, 0},
    223 	    {0, 0, 0, 0},
    224 	    {0, 0, 0, 0},
    225 	    {0, 0, 0, 0},
    226 	    {0, 0, 0, 0}}}},
    227 };
    228 
    229 struct wsmouse_calibcoords *
    230 calibration_sample_lookup(void)
    231 {
    232 	struct calibration_sample_table *tab;
    233 	platid_mask_t mask;
    234 
    235 	for (tab = calibration_sample_table;
    236 	    tab->cst_platform.dw.dw1 != PLATID_UNKNOWN; tab++) {
    237 
    238 		mask = PLATID_DEREF(&tab->cst_platform);
    239 
    240 		if (platid_match(&platid, &mask)) {
    241 			return (&tab->cst_sample);
    242 		}
    243 	}
    244 
    245 	return (0);
    246 }
    247 
    248 int
    249 ucbtp_calibration(struct ucbtp_softc *sc)
    250 {
    251 	struct wsmouse_calibcoords *cs;
    252 
    253 	if (sc->sc_tc->tc_videot)
    254 		video_calibration_pattern(sc->sc_tc->tc_videot); /* debug */
    255 
    256 	tpcalib_init(&sc->sc_tpcalib);
    257 
    258 	if (!(cs = calibration_sample_lookup())) {
    259 		DPRINTF("no calibration data");
    260 		return (1);
    261 	}
    262 
    263 	sc->sc_calibrated =
    264 	    tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS,
    265 		(void *)cs, 0, 0) == 0 ? 1 : 0;
    266 
    267 	if (!sc->sc_calibrated)
    268 		printf("not ");
    269 	printf("calibrated");
    270 
    271 	return (0);
    272 }
    273 
    274 int
    275 ucbtp_match(device_t parent, cfdata_t cf, void *aux)
    276 {
    277 
    278 	return (1);
    279 }
    280 
    281 void
    282 ucbtp_attach(device_t parent, device_t self, void *aux)
    283 {
    284 	struct ucb1200_attach_args *ucba = aux;
    285 	struct ucbtp_softc *sc = device_private(self);
    286 	struct wsmousedev_attach_args wsmaa;
    287 	tx_chipset_tag_t tc;
    288 
    289 	sc->sc_dev = self;
    290 	tc = sc->sc_tc = ucba->ucba_tc;
    291 	sc->sc_sib = ucba->ucba_sib;
    292 	sc->sc_ucb = ucba->ucba_ucb;
    293 
    294 	printf(": ");
    295 	/* touch panel interrupt */
    296 	tx_intr_establish(tc, MAKEINTR(1, TX39_INTRSTATUS1_SIBIRQPOSINT),
    297 	    IST_EDGE, IPL_TTY, ucbtp_sibintr, sc);
    298 
    299 	/* attempt to calibrate touch panel */
    300 	ucbtp_calibration(sc);
    301 #ifdef TX392X /* hack for Telios HC-VJ1C */
    302 	sc->sc_xy_reverse = 1;
    303 #endif
    304 
    305 	printf("\n");
    306 
    307 	wsmaa.accessops = &ucbtp_accessops;
    308 	wsmaa.accesscookie = sc;
    309 
    310 	ucb1200_state_install(parent, ucbtp_busy, self, UCB1200_TP_MODULE);
    311 
    312 	/*
    313 	 * attach the wsmouse
    314 	 */
    315 	sc->sc_wsmousedev = config_found(self, &wsmaa, wsmousedevprint,
    316 	    CFARGS_NONE);
    317 }
    318 
    319 int
    320 ucbtp_busy(void *arg)
    321 {
    322 	struct ucbtp_softc *sc = arg;
    323 
    324 	return (sc->sm_state != UCBADC_IDLE);
    325 }
    326 
    327 int
    328 ucbtp_poll(void *arg)
    329 {
    330 	struct ucbtp_softc *sc = arg;
    331 
    332 	if (!ucb1200_state_idle(sc->sc_ucb)) /* subframe0 busy */
    333 		return (POLL_CONT);
    334 
    335 	if (sc->sc_polling_finish) {
    336 		sc->sc_polling_finish = 0;
    337 		return (POLL_END);
    338 	}
    339 
    340 	/* execute A-D converter */
    341 	sc->sm_state = UCBADC_ADC_INIT;
    342 	ucbtp_adc_async(sc);
    343 
    344 	return (POLL_CONT);
    345 }
    346 
    347 int
    348 ucbtp_sibintr(void *arg)
    349 {
    350 	struct ucbtp_softc *sc = arg;
    351 
    352 	sc->sc_stat = UCBTS_STAT_TOUCH;
    353 
    354 	/* click! */
    355 	tx_sound_click(sc->sc_tc);
    356 
    357 	/* invoke touch panel polling */
    358 	if (!sc->sc_polling) {
    359 		sc->sc_pollh = tx39_poll_establish(sc->sc_tc, 1, IST_EDGE,
    360 		    ucbtp_poll, sc);
    361 		if (!sc->sc_pollh) {
    362 			printf("%s: can't poll\n", device_xname(sc->sc_dev));
    363 		}
    364 	}
    365 
    366 	/* don't acknoledge interrupt until polling finish */
    367 
    368 	return (0);
    369 }
    370 
    371 #define REGWRITE(addr, reg, ret) (					\
    372 	sc->sm_addr = (addr),						\
    373 	sc->sm_reg = (reg),						\
    374 	sc->sm_returnstate = (ret),					\
    375 	sc->sm_state = UCBADC_REGWRITE)
    376 #define REGREAD(addr, ret) (						\
    377 	sc->sm_addr = (addr),						\
    378 	sc->sm_returnstate = (ret),					\
    379 	sc->sm_state = UCBADC_REGREAD)
    380 
    381 int
    382 ucbtp_adc_async(void *arg)
    383 {
    384 	struct ucbtp_softc *sc = arg;
    385 	tx_chipset_tag_t tc = sc->sc_tc;
    386 	txreg_t reg;
    387 	u_int16_t reg16;
    388 
    389 	DPRINTFN(9, "state: %d\n", sc->sm_state);
    390 
    391 	switch (sc->sm_state) {
    392 	default:
    393 		panic("ucbtp_adc: invalid state %d", sc->sm_state);
    394 		/* NOTREACHED */
    395 		break;
    396 
    397 	case UCBADC_IDLE:
    398 		/* nothing to do */
    399 		break;
    400 
    401 	case UCBADC_ADC_INIT:
    402 		sc->sc_polling++;
    403 		sc->sc_stat = UCBTS_STAT_DRAG;
    404 		/* enable heart beat of this state machine */
    405 		sc->sm_ih = tx_intr_establish(
    406 			tc,
    407 			MAKEINTR(1, TX39_INTRSTATUS1_SIBSF0INT),
    408 			IST_EDGE, IPL_TTY, ucbtp_adc_async, sc);
    409 
    410 		sc->sm_state = UCBADC_MEASUMENT_INIT;
    411 		break;
    412 
    413 	case UCBADC_ADC_FINI:
    414 		/* disable heart beat of this state machine */
    415 		tx_intr_disestablish(tc, sc->sm_ih);
    416 		sc->sm_state = UCBADC_IDLE;
    417 		break;
    418 
    419 	case UCBADC_MEASUMENT_INIT:
    420 		switch (sc->sm_measurement) {
    421 		default:
    422 			panic("unknown measurement spec.");
    423 			/* NOTREACHED */
    424 			break;
    425 		case UCBADC_MEASUREMENT_X:
    426 			REGWRITE(UCB1200_TSCTRL_REG,
    427 			    UCB1200_TSCTRL_XPOSITION,
    428 			    UCBADC_ADC_ENABLE);
    429 			break;
    430 		case UCBADC_MEASUREMENT_Y:
    431 			REGWRITE(UCB1200_TSCTRL_REG,
    432 			    UCB1200_TSCTRL_YPOSITION,
    433 			    UCBADC_ADC_ENABLE);
    434 			break;
    435 		case UCBADC_MEASUREMENT_PRESSURE:
    436 			REGWRITE(UCB1200_TSCTRL_REG,
    437 			    UCB1200_TSCTRL_PRESSURE,
    438 			    UCBADC_ADC_ENABLE);
    439 			break;
    440 		}
    441 		break;
    442 
    443 	case UCBADC_MEASUMENT_FINI:
    444 		switch (sc->sm_measurement) {
    445 		case UCBADC_MEASUREMENT_X:
    446 			sc->sm_measurement = UCBADC_MEASUREMENT_Y;
    447 			sc->sm_state = UCBADC_MEASUMENT_INIT;
    448 			break;
    449 		case UCBADC_MEASUREMENT_Y:
    450 			sc->sm_measurement = UCBADC_MEASUREMENT_PRESSURE;
    451 			sc->sm_state = UCBADC_MEASUMENT_INIT;
    452 			break;
    453 		case UCBADC_MEASUREMENT_PRESSURE:
    454 			sc->sm_measurement = UCBADC_MEASUREMENT_X;
    455 			/* measurement complete. pass down to wsmouse_input */
    456 			sc->sm_state = UCBADC_ADC_INPUT;
    457 			break;
    458 		}
    459 		break;
    460 
    461 	case UCBADC_ADC_ENABLE:
    462 		switch (sc->sm_measurement) {
    463 		case UCBADC_MEASUREMENT_PRESSURE:
    464 			/* FALLTHROUGH */
    465 		case UCBADC_MEASUREMENT_X:
    466 			sc->sm_tmpreg = UCB1200_ADCCTRL_INPUT_SET(
    467 				UCB1200_ADCCTRL_ENABLE,
    468 				UCB1200_ADCCTRL_INPUT_TSPX);
    469 			REGWRITE(UCB1200_ADCCTRL_REG, sc->sm_tmpreg,
    470 			    UCBADC_ADC_START0);
    471 			break;
    472 		case UCBADC_MEASUREMENT_Y:
    473 			sc->sm_tmpreg = UCB1200_ADCCTRL_INPUT_SET(
    474 				UCB1200_ADCCTRL_ENABLE,
    475 				UCB1200_ADCCTRL_INPUT_TSPY);
    476 			REGWRITE(UCB1200_ADCCTRL_REG, sc->sm_tmpreg,
    477 			    UCBADC_ADC_START0);
    478 			break;
    479 		}
    480 		break;
    481 
    482 	case UCBADC_ADC_START0:
    483 		REGWRITE(UCB1200_ADCCTRL_REG,
    484 		    sc->sm_tmpreg | UCB1200_ADCCTRL_START,
    485 		    UCBADC_ADC_START1);
    486 		break;
    487 
    488 	case UCBADC_ADC_START1:
    489 		REGWRITE(UCB1200_ADCCTRL_REG,
    490 		    sc->sm_tmpreg,
    491 		    UCBADC_ADC_DATAREAD);
    492 		sc->sm_retry = UCBADC_RETRY_DEFAULT;
    493 		break;
    494 
    495 	case UCBADC_ADC_DATAREAD:
    496 		REGREAD(UCB1200_ADCDATA_REG, UCBADC_ADC_DATAREAD_WAIT);
    497 		break;
    498 
    499 	case UCBADC_ADC_DATAREAD_WAIT:
    500 		reg16 = TX39_SIBSF0_REGDATA(sc->sm_reg);
    501 		if (!(reg16 & UCB1200_ADCDATA_INPROGRESS) &&
    502 		    --sc->sm_retry > 0) {
    503 			sc->sm_state = UCBADC_ADC_DATAREAD;
    504 		} else {
    505 			if (sc->sm_retry <= 0) {
    506 				printf("dataread failed\n");
    507 				sc->sm_state = UCBADC_ADC_FINI;
    508 				break;
    509 			}
    510 
    511 			switch (sc->sm_measurement) {
    512 			case UCBADC_MEASUREMENT_X:
    513 				sc->sc_x = UCB1200_ADCDATA(reg16);
    514 				DPRINTFN(9, "x=%d\n", sc->sc_x);
    515 				break;
    516 			case UCBADC_MEASUREMENT_Y:
    517 				sc->sc_y = UCB1200_ADCDATA(reg16);
    518 				DPRINTFN(9, "y=%d\n", sc->sc_y);
    519 				break;
    520 			case UCBADC_MEASUREMENT_PRESSURE:
    521 				sc->sc_p = UCB1200_ADCDATA(reg16);
    522 				DPRINTFN(9, "p=%d\n", sc->sc_p);
    523 				break;
    524 			}
    525 
    526 			sc->sm_state = UCBADC_ADC_DISABLE;
    527 		}
    528 
    529 		break;
    530 
    531 	case UCBADC_ADC_DISABLE:
    532 		REGWRITE(UCB1200_ADCCTRL_REG, 0, UCBADC_ADC_INTRMODE);
    533 
    534 		break;
    535 	case UCBADC_ADC_INTRMODE:
    536 		REGWRITE(UCB1200_TSCTRL_REG, UCB1200_TSCTRL_INTERRUPT,
    537 		    UCBADC_MEASUMENT_FINI);
    538 		break;
    539 
    540 	case UCBADC_ADC_INPUT:
    541 		if (ucbtp_input(sc) == 0)
    542 			sc->sm_state = UCBADC_ADC_FINI;
    543 		else
    544 			sc->sm_state = UCBADC_INTR_ACK0;
    545 		break;
    546 
    547 	case UCBADC_INTR_ACK0:
    548 		REGREAD(UCB1200_INTSTAT_REG, UCBADC_INTR_ACK1);
    549 		break;
    550 
    551 	case UCBADC_INTR_ACK1:
    552 		REGWRITE(UCB1200_INTSTAT_REG, sc->sm_reg, UCBADC_INTR_ACK2);
    553 		break;
    554 
    555 	case UCBADC_INTR_ACK2:
    556 		sc->sc_polling_finish = 1;
    557 		REGWRITE(UCB1200_INTSTAT_REG, 0, UCBADC_ADC_FINI);
    558 		break;
    559 
    560 		/*
    561 		 * UCB1200 register access state
    562 		 */
    563 	case UCBADC_REGREAD:
    564 		/*
    565 		 * In	: sc->sm_addr
    566 		 * Out	: sc->sm_reg  (with SIBtag)
    567 		 */
    568 #define TXSIB_REGREAD_INIT	0
    569 #define TXSIB_REGREAD_READ	1
    570 		switch (sc->sm_read_state) {
    571 		case TXSIB_REGREAD_INIT:
    572 			reg = TX39_SIBSF0_REGADDR_SET(0, sc->sm_addr);
    573 			tx_conf_write(tc, TX39_SIBSF0CTRL_REG, reg);
    574 			sc->sm_rw_retry = UCBADC_RETRY_DEFAULT;
    575 			sc->sm_read_state = TXSIB_REGREAD_READ;
    576 			break;
    577 		case TXSIB_REGREAD_READ:
    578 			reg = tx_conf_read(tc, TX39_SIBSF0STAT_REG);
    579 			if ((TX39_SIBSF0_REGADDR(reg) != sc->sm_addr) &&
    580 			    --sc->sm_rw_retry > 0) {
    581 				break;
    582 			}
    583 
    584 			if (sc->sm_rw_retry <= 0) {
    585 				printf("sf0read: command failed\n");
    586 				sc->sm_state = UCBADC_ADC_FINI;
    587 			} else {
    588 				sc->sm_reg = reg;
    589 				sc->sm_read_state = TXSIB_REGREAD_INIT;
    590 				DPRINTFN(9, "%08x\n", reg);
    591 				if (sc->sm_writing)
    592 					sc->sm_state = UCBADC_REGWRITE;
    593 				else
    594 					sc->sm_state = sc->sm_returnstate;
    595 			}
    596 			break;
    597 		}
    598 		break;
    599 
    600 	case UCBADC_REGWRITE:
    601 		/*
    602 		 * In	: sc->sm_addr, sc->sm_reg (lower 16bit only)
    603 		 */
    604 #define TXSIB_REGWRITE_INIT	0
    605 #define TXSIB_REGWRITE_WRITE	1
    606 		switch (sc->sm_write_state) {
    607 		case TXSIB_REGWRITE_INIT:
    608 			sc->sm_writing = 1;
    609 			sc->sm_write_state = TXSIB_REGWRITE_WRITE;
    610 			sc->sm_state = UCBADC_REGREAD;
    611 
    612 			sc->sm_write_val = sc->sm_reg;
    613 			break;
    614 		case TXSIB_REGWRITE_WRITE:
    615 			sc->sm_writing = 0;
    616 			sc->sm_write_state = TXSIB_REGWRITE_INIT;
    617 			sc->sm_state = sc->sm_returnstate;
    618 
    619 			reg = sc->sm_reg;
    620 			reg |= TX39_SIBSF0_WRITE;
    621 			TX39_SIBSF0_REGDATA_CLR(reg);
    622 			reg = TX39_SIBSF0_REGDATA_SET(reg, sc->sm_write_val);
    623 			tx_conf_write(tc, TX39_SIBSF0CTRL_REG, reg);
    624 			break;
    625 		}
    626 		break;
    627 	}
    628 
    629 	return (0);
    630 }
    631 
    632 int
    633 ucbtp_input(struct ucbtp_softc *sc)
    634 {
    635 	int rx, ry, x, y, p;
    636 
    637 	rx = sc->sc_x;
    638 	ry = sc->sc_y;
    639 	p = sc->sc_p;
    640 
    641 	if (!sc->sc_calibrated) {
    642 		DPRINTFN(2, "x=%4d y=%4d p=%4d\n", rx, ry, p);
    643 		DPRINTF("ucbtp_input: no calibration data\n");
    644 	}
    645 
    646 	if (p < UCBTS_PRESS_THRESHOLD || rx == 0x3ff || ry == 0x3ff ||
    647 	    rx == 0 || ry == 0) {
    648 		sc->sc_stat = UCBTS_STAT_RELEASE;
    649 		if (sc->sc_polling < UCBTS_TAP_THRESHOLD) {
    650 			DPRINTFN(2, "TAP!\n");
    651 			/* button 0 DOWN */
    652 			wsmouse_input(sc->sc_wsmousedev, 1, 0, 0, 0, 0, 0);
    653 			/* button 0 UP */
    654 			wsmouse_input(sc->sc_wsmousedev, 0, 0, 0, 0, 0, 0);
    655 		} else {
    656 			wsmouse_input(sc->sc_wsmousedev, 0,
    657 			    sc->sc_ox, sc->sc_oy, 0, 0,
    658 			    WSMOUSE_INPUT_ABSOLUTE_X |
    659 			    WSMOUSE_INPUT_ABSOLUTE_Y);
    660 
    661 			DPRINTFN(2, "RELEASE\n");
    662 		}
    663 		sc->sc_polling = 0;
    664 
    665 		return (1);
    666 	}
    667 
    668 	if (sc->sc_xy_reverse)
    669 		tpcalib_trans(&sc->sc_tpcalib, ry, rx, &x, &y);
    670 	else
    671 		tpcalib_trans(&sc->sc_tpcalib, rx, ry, &x, &y);
    672 
    673 	DPRINTFN(2, "x: %4d->%4d y: %4d->%4d pressure=%4d\n",
    674 	    rx, x, ry, y, p);
    675 
    676 	/* debug draw */
    677 	if (sc->sc_tc->tc_videot) {
    678 		if (sc->sc_polling == 1)
    679 			video_dot(sc->sc_tc->tc_videot, x, y);
    680 		else
    681 			video_line(sc->sc_tc->tc_videot, sc->sc_ox,
    682 			    sc->sc_oy, x, y);
    683 	}
    684 
    685 	sc->sc_ox = x, sc->sc_oy = y;
    686 
    687 	wsmouse_input(sc->sc_wsmousedev, 1, x, y, 0, 0,
    688 	    WSMOUSE_INPUT_ABSOLUTE_X | WSMOUSE_INPUT_ABSOLUTE_Y);
    689 
    690 	return (0);
    691 }
    692 
    693 /*
    694  * access ops.
    695  */
    696 
    697 int
    698 ucbtp_enable(void *v)
    699 {
    700 	/* not yet */
    701 	return (0);
    702 }
    703 
    704 void
    705 ucbtp_disable(void *v)
    706 {
    707 	/* not yet */
    708 }
    709 
    710 int
    711 ucbtp_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
    712 {
    713 	struct ucbtp_softc *sc = v;
    714 
    715 	DPRINTF("%s(%d): ucbtp_ioctl(%08lx)\n", __FILE__, __LINE__, cmd);
    716 
    717 	switch (cmd) {
    718 	case WSMOUSEIO_SRES:
    719 		printf("%s(%d): WSMOUSRIO_SRES is not supported",
    720 		    __FILE__, __LINE__);
    721 		break;
    722 
    723 	default:
    724 		return hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, l);
    725 	}
    726 
    727 	return 0;
    728 }
    729