/*	$NetBSD: vrpiu.c,v 1.44 2021/08/07 16:18:54 thorpej Exp $	*/

/*
 * Copyright (c) 1999-2003 TAKEMURA Shin All rights reserved.
 * Copyright (c) 2000-2001 SATO Kazumi, All rights reserved.
 * Copyright (c) 1999-2001 PocketBSD Project. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

/*
 * A/D polling part written by SATO Kazumi.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vrpiu.c,v 1.44 2021/08/07 16:18:54 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/callout.h>
#include <sys/boot_flag.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>

#include <machine/bus.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>
#include <machine/config_hook.h>

#include <dev/hpc/hpctpanelvar.h>

#include <dev/hpc/hpcbatteryvar.h>
#include <dev/hpc/hpcbatterytable.h>

#include <hpcmips/vr/vrcpudef.h>
#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/cmureg.h>
#include <hpcmips/vr/vrpiuvar.h>
#define	PIUB_REG_OFFSSET	0
#include <hpcmips/vr/vrpiureg.h>

/*
 * contant and macro definitions
 */
#define VRPIUDEBUG
#ifdef VRPIUDEBUG
int	vrpiu_debug = 0;
#define	DPRINTF(arg) if (vrpiu_debug) printf arg;
#define	VPRINTF(arg) if (bootverbose || vrpiu_debug) printf arg;
#else
#define	DPRINTF(arg)
#define	VPRINTF(arg) if (bootverbose) printf arg;
#endif

#ifndef VRPIU_NO_ADHOC_BATTERY_EVENT
#define VRPIU_ADHOC_BATTERY_EVENT	/* currently... */
#endif /* VRPIU_NO_ADHOC_BATTERY_EVENT */

#ifndef VRPIU_AD_POLL_INTERVAL
#define VRPIU_AD_POLL_INTERVAL	60	/* interval is 60 sec */
#endif /* VRPIU_AD_POLL_INTERTVAL */

#define	PIUSIVL_SCANINTVAL_MIN	333			/* 10msec	*/
#define	PIUSIVL_SCANINTVAL_MAX	PIUSIVL_SCANINTVAL_MASK	/* 60msec	*/
#define VRPIU_TP_SCAN_TIMEOUT	(hz/10)		/* timeout is 100msec	*/

#define TP_INTR	(PIUINT_ALLINTR & ~PIUINT_PADADPINTR)
#define AD_INTR	(PIUINT_PADADPINTR)

/*
 * data types
 */
/* struct vrpiu_softc is defined in vrpiuvar.h */

/*
 * function prototypes
 */
static int	vrpiumatch(device_t, cfdata_t, void *);
static void	vrpiuattach(device_t, device_t, void *);
static void	vrc4173piuattach(device_t, device_t, void *);
static void	vrpiu_init(struct vrpiu_softc *, void *);

static void	vrpiu_write(struct vrpiu_softc *, int, unsigned short);
static u_short	vrpiu_read(struct vrpiu_softc *, int);

static int	vrpiu_intr(void *);
static void	vrpiu_tp_intr(struct vrpiu_softc *);
static void	vrpiu_ad_intr(struct vrpiu_softc *);
#ifdef DEBUG
static void	vrpiu_dump_cntreg(unsigned int);
#endif

static int	vrpiu_tp_enable(void *);
static int	vrpiu_tp_ioctl(void *, u_long, void *, int, struct lwp *);
static void	vrpiu_tp_disable(void *);
static void	vrpiu_tp_up(struct vrpiu_softc *);
static void	vrpiu_tp_timeout(void *);
int		vrpiu_ad_enable(void *);
void		vrpiu_ad_disable(void *);
static void	vrpiu_start_powerstate(void *);
static void	vrpiu_calc_powerstate(struct vrpiu_softc *);
static void	vrpiu_send_battery_event(struct vrpiu_softc *);
static void	vrpiu_power(int, void *);
static u_int	scan_interval(u_int data);

/* mra is defined in mra.c */
int mra_Y_AX1_BX2_C(int *y, int ys, int *x1, int x1s, int *x2, int x2s,
    int n, int scale, int *a, int *b, int *c);

/*
 * static or global variables
 */
CFATTACH_DECL_NEW(vrpiu, sizeof(struct vrpiu_softc),
    vrpiumatch, vrpiuattach, NULL, NULL);
CFATTACH_DECL_NEW(vrc4173piu, sizeof(struct vrpiu_softc),
    vrpiumatch, vrc4173piuattach, NULL, NULL);

const struct wsmouse_accessops vrpiu_accessops = {
	vrpiu_tp_enable,
	vrpiu_tp_ioctl,
	vrpiu_tp_disable,
};

int vrpiu_ad_poll_interval = VRPIU_AD_POLL_INTERVAL;

/*
 * function definitions
 */
static inline void
vrpiu_write(struct vrpiu_softc *sc, int port, unsigned short val)
{

	bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
}

static inline u_short
vrpiu_read(struct vrpiu_softc *sc, int port)
{

	return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
}

static inline u_short
vrpiu_buf_read(struct vrpiu_softc *sc, int port)
{

	return (bus_space_read_2(sc->sc_iot, sc->sc_buf_ioh, port));
}

static int
vrpiumatch(device_t parent, cfdata_t cf, void *aux)
{

	return (1);
}

static void
vrpiuattach(device_t parent, device_t self, void *aux)
{
	struct vrpiu_softc *sc = device_private(self);

	sc->sc_dev = self;
	sc->sc_ab_paddata_mask = PIUAB_PADDATA_MASK;
	sc->sc_pb_paddata_mask = PIUPB_PADDATA_MASK;
	sc->sc_pb_paddata_max = PIUPB_PADDATA_MAX;
	vrpiu_init(sc, aux);
}

static void
vrc4173piuattach(device_t parent, device_t self, void *aux)
{
	struct vrpiu_softc *sc = device_private(self);

	sc->sc_dev = self;
	sc->sc_ab_paddata_mask = VRC4173PIUAB_PADDATA_MASK;
	sc->sc_pb_paddata_mask = VRC4173PIUPB_PADDATA_MASK;
	sc->sc_pb_paddata_max = VRC4173PIUPB_PADDATA_MAX;
	vrpiu_init(sc, aux);
}

static void
vrpiu_init(struct vrpiu_softc *sc, void *aux)
{
	struct vrip_attach_args *va = aux;
	struct wsmousedev_attach_args wsmaa;
	int res;
	bus_space_tag_t iot = va->va_iot;
	struct platid_data *p;

	if (va->va_parent_ioh != 0)
		res = bus_space_subregion(iot, va->va_parent_ioh, va->va_addr,
		    va->va_size, &sc->sc_ioh);
	else
		res = bus_space_map(iot, va->va_addr, va->va_size, 0,
		    &sc->sc_ioh);
	if (res != 0) {
		printf(": can't map bus space\n");
		return;
	}
	if (va->va_parent_ioh != 0)
		res = bus_space_subregion(iot, va->va_parent_ioh, va->va_addr2,
		    va->va_size2, &sc->sc_buf_ioh);
	else
		res = bus_space_map(iot, va->va_addr2, va->va_size2, 0,
		    &sc->sc_buf_ioh);
	if (res != 0) {
		printf(": can't map second bus space\n");
		return;
	}

	sc->sc_iot = iot;
	sc->sc_unit = va->va_unit;
	sc->sc_vrip = va->va_vc;

	sc->sc_interval = scan_interval(WSMOUSE_RES_DEFAULT);
	if ((p = platid_search_data(&platid, hpcbattery_parameters)) == NULL)
		sc->sc_battery_spec = NULL;
	else
		sc->sc_battery_spec  = p->data;

	/*
	 * disable device until vrpiu_enable called
	 */
	sc->sc_tpstat = VRPIU_TP_STAT_DISABLE;

	/* initialize touch panel timeout structure	*/
	callout_init(&sc->sc_tptimeout, 0);

	/* initialize calibration context	*/
	tpcalib_init(&sc->sc_tpcalib);
#if 1
	/*
	 * XXX, calibrate parameters
	 */
	{
		int i;
		static const struct {
			platid_mask_t *mask;
			struct wsmouse_calibcoords coords;
		} calibrations[] = {
			{ &platid_mask_MACH_NEC_MCR_700,
			  { 0, 0, 799, 599,
			    4,
			    { { 115,  80,   0,   0 },
			      { 115, 966,   0, 599 },
			      { 912,  80, 799,   0 },
			      { 912, 966, 799, 599 } } } },
			{ &platid_mask_MACH_NEC_MCR_700A,
			  { 0, 0, 799, 599,
			    4,
			    { { 115,  80,   0,   0 },
			      { 115, 966,   0, 599 },
			      { 912,  80, 799,   0 },
			      { 912, 966, 799, 599 } } } },
			{ &platid_mask_MACH_NEC_MCR_730,
			  { 0, 0, 799, 599,
			    4,
			    { { 115,  80,   0,   0 },
			      { 115, 966,   0, 599 },
			      { 912,  80, 799,   0 },
			      { 912, 966, 799, 599 } } } },
			{ &platid_mask_MACH_NEC_MCR_730A,
			  { 0, 0, 799, 599,
			    4,
			    { { 115,  80,   0,   0 },
			      { 115, 966,   0, 599 },
			      { 912,  80, 799,   0 },
			      { 912, 966, 799, 599 } } } },
			{ NULL,		/* samples got on my MC-R500 */
			  { 0, 0, 639, 239,
			    5,
			    { { 502, 486, 320, 120 },
			      {  55, 109,   0,   0 },
			      {  54, 913,   0, 239 },
			      { 973, 924, 639, 239 },
			      { 975, 123, 639,   0 } } } },
		};
		for (i = 0; ; i++) {
			if (calibrations[i].mask == NULL
			    || platid_match(&platid, calibrations[i].mask))
				break;
		}
		tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS,
		    (void *)__UNCONST(&calibrations[i].coords), 0, 0);
	}
#endif

	/* install interrupt handler and enable interrupt */
	if (!(sc->sc_handler =
	    vrip_intr_establish(sc->sc_vrip, sc->sc_unit, 0, IPL_TTY,
		vrpiu_intr, sc))) {
		printf (": can't map interrupt line.\n");
		return;
	}

	/* mask level2 interrupt, stop scan sequencer and mask clock to piu */
	vrpiu_tp_disable(sc);

	printf("\n");

	wsmaa.accessops = &vrpiu_accessops;
	wsmaa.accesscookie = sc;

	/*
	 * attach the wsmouse
	 */
	sc->sc_wsmousedev = config_found(sc->sc_dev, &wsmaa, wsmousedevprint,
	    CFARGS_NONE);

	/*
	 * power management events
	 */
	sc->sc_power_hook = powerhook_establish(device_xname(sc->sc_dev),
	    vrpiu_power, sc);
	if (sc->sc_power_hook == NULL)
		aprint_error("%s: WARNING: couldn't establish powerhook\n",
		    device_xname(sc->sc_dev));

	/*
	 * init A/D port polling.
	 */
	sc->sc_battery.n_values = 3;
	sc->sc_battery.value[0] = -1;
	sc->sc_battery.value[1] = -1;
	sc->sc_battery.value[2] = -1;
	sc->sc_battery.nextpoll = hz*vrpiu_ad_poll_interval;
	callout_init(&sc->sc_adpoll, 0);
	callout_reset(&sc->sc_adpoll, hz, vrpiu_start_powerstate, sc);
}

/*
 * calculate interval value
 *  input: WSMOUSE_RES_MIN - WSMOUSE_RES_MAX
 * output: value for PIUSIVL_REG
 */
static u_int
scan_interval(u_int data)
{
	int scale;

	if (data < WSMOUSE_RES_MIN)
		data = WSMOUSE_RES_MIN;

	if (WSMOUSE_RES_MAX < data)
		data = WSMOUSE_RES_MAX;

	scale = WSMOUSE_RES_MAX - WSMOUSE_RES_MIN;
	data += WSMOUSE_RES_MIN;

	return PIUSIVL_SCANINTVAL_MIN +
	    (PIUSIVL_SCANINTVAL_MAX - PIUSIVL_SCANINTVAL_MIN) *
	    (scale - data) / scale;
}

int
vrpiu_ad_enable(void *v)
{
	struct vrpiu_softc *sc = v;
	int s;
	unsigned int cnt;

	DPRINTF(("%s(%d): vrpiu_ad_enable(): interval=0x%03x\n",
	    __FILE__, __LINE__, sc->sc_interval));
	if (sc->sc_adstat != VRPIU_AD_STAT_DISABLE)
		return EBUSY;

	/* supply clock to PIU */
	vrip_power(sc->sc_vrip, sc->sc_unit, 1);

	/* set scan interval */
	vrpiu_write(sc, PIUSIVL_REG_W, sc->sc_interval);

	s = spltty();

	/* clear interrupt status */
	vrpiu_write(sc, PIUINT_REG_W, AD_INTR);

	/* Disable -> Standby */
	cnt = PIUCNT_PIUPWR |
	    PIUCNT_PIUMODE_COORDINATE |
	    PIUCNT_PADATSTART | PIUCNT_PADATSTOP;
	vrpiu_write(sc, PIUCNT_REG_W, cnt);

	/* Level2 interrupt register setting */
	vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, AD_INTR, 1);

	/* save pen status, touch or release */
	cnt = vrpiu_read(sc, PIUCNT_REG_W);

	/*
	 * Enable scan sequencer operation
	 * Standby -> WaitPenTouch
	 */
	cnt |= PIUCNT_PIUSEQEN;
	vrpiu_write(sc, PIUCNT_REG_W, cnt);

	sc->sc_adstat = VRPIU_AD_STAT_ENABLE;

	splx(s);

	return 0;
}

void
vrpiu_ad_disable(void *v)
{
	struct vrpiu_softc *sc = v;

	DPRINTF(("%s(%d): vrpiu_ad_disable()\n", __FILE__, __LINE__));

	/* Set level2 interrupt register to mask interrupts */
	vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, AD_INTR, 0);

	sc->sc_adstat = VRPIU_AD_STAT_DISABLE;

	if (sc->sc_tpstat == VRPIU_TP_STAT_DISABLE){
		/* Disable scan sequencer operation and power off */
		vrpiu_write(sc, PIUCNT_REG_W, 0);

		/* mask clock to PIU */
		vrip_power(sc->sc_vrip, sc->sc_unit, 0);
	}
}

int
vrpiu_tp_enable(void *v)
{
	struct vrpiu_softc *sc = v;
	int s;
	unsigned int cnt;

	DPRINTF(("%s(%d): vrpiu_tp_enable(): interval=0x%03x\n",
	    __FILE__, __LINE__, sc->sc_interval));
	if (sc->sc_tpstat != VRPIU_TP_STAT_DISABLE)
		return EBUSY;

	/* supply clock to PIU */
	vrip_power(sc->sc_vrip, sc->sc_unit, 1);

	/* set scan interval */
	vrpiu_write(sc, PIUSIVL_REG_W, sc->sc_interval);

	s = spltty();

	/* clear interrupt status */
	vrpiu_write(sc, PIUINT_REG_W, TP_INTR);

	/* Disable -> Standby */
	cnt = PIUCNT_PIUPWR |
	    PIUCNT_PIUMODE_COORDINATE |
	    PIUCNT_PADATSTART | PIUCNT_PADATSTOP;
	vrpiu_write(sc, PIUCNT_REG_W, cnt);

	/* Level2 interrupt register setting */
	vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, TP_INTR, 1);

	/* save pen status, touch or release */
	cnt = vrpiu_read(sc, PIUCNT_REG_W);

	/*
	 * Enable scan sequencer operation
	 * Standby -> WaitPenTouch
	 */
	cnt |= PIUCNT_PIUSEQEN;
	vrpiu_write(sc, PIUCNT_REG_W, cnt);

	/* transit status DISABLE -> TOUCH or RELEASE */
	sc->sc_tpstat = (cnt & PIUCNT_PENSTC) ?
	    VRPIU_TP_STAT_TOUCH : VRPIU_TP_STAT_RELEASE;

	splx(s);

	return 0;
}

void
vrpiu_tp_disable(void *v)
{
	struct vrpiu_softc *sc = v;

	DPRINTF(("%s(%d): vrpiu_tp_disable()\n", __FILE__, __LINE__));

	/* Set level2 interrupt register to mask interrupts */
	vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, TP_INTR, 0);

	sc->sc_tpstat = VRPIU_TP_STAT_DISABLE;

	if (sc->sc_adstat == VRPIU_AD_STAT_DISABLE){
		/* Disable scan sequencer operation and power off */
		vrpiu_write(sc, PIUCNT_REG_W, 0);

		/* mask clock to PIU */
		vrip_power(sc->sc_vrip, sc->sc_unit, 0);
	}
}

int
vrpiu_tp_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
	struct vrpiu_softc *sc = v;

	DPRINTF(("%s(%d): vrpiu_tp_ioctl(%08lx)\n", __FILE__, __LINE__, cmd));

	switch (cmd) {
	case WSMOUSEIO_SRES:
	{
		int tp_enable;
		int ad_enable;

		tp_enable = (sc->sc_tpstat != VRPIU_TP_STAT_DISABLE);
		ad_enable = (sc->sc_adstat != VRPIU_AD_STAT_DISABLE);

		if (tp_enable)
			vrpiu_tp_disable(sc);
		if (ad_enable)
			vrpiu_ad_disable(sc);

		sc->sc_interval = scan_interval(*(u_int *)data);
		DPRINTF(("%s(%d): WSMOUSEIO_SRES: *data=%d, interval=0x%03x\n",
		    __FILE__, __LINE__, *(u_int *)data, sc->sc_interval));

		if (sc->sc_interval < PIUSIVL_SCANINTVAL_MIN)
			sc->sc_interval = PIUSIVL_SCANINTVAL_MIN;

		if (PIUSIVL_SCANINTVAL_MAX < sc->sc_interval)
			sc->sc_interval = PIUSIVL_SCANINTVAL_MAX;

		if (tp_enable)
			vrpiu_tp_enable(sc);
		if (ad_enable)
			vrpiu_ad_enable(sc);
	}
	break;

	default:
		return hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, l);
	}
	return 0;
}

/*
 * PIU AD interrupt handler.
 */
void
vrpiu_ad_intr(struct vrpiu_softc *sc)
{
	unsigned int i;
	unsigned int intrstat;

	intrstat = vrpiu_read(sc, PIUINT_REG_W);

	if (sc->sc_adstat == VRPIU_AD_STAT_DISABLE) {
		/*
		 * the device isn't enabled. just clear interrupt.
		 */
		vrpiu_write(sc, PIUINT_REG_W, AD_INTR);
		return;
	}

	if (intrstat & PIUINT_PADADPINTR) {
		sc->sc_battery.value[0] = (unsigned int)
		    vrpiu_buf_read(sc, PIUAB(0));
		sc->sc_battery.value[1] = (unsigned int)
		    vrpiu_buf_read(sc, PIUAB(1));
		sc->sc_battery.value[2] = (unsigned int)
		    vrpiu_buf_read(sc, PIUAB(2));
	}

	if (intrstat & PIUINT_PADADPINTR) {
		for (i = 0; i < 3; i++) {
			if (sc->sc_battery.value[i] & PIUAB_VALID)
				sc->sc_battery.value[i] &=
					sc->sc_ab_paddata_mask;
			else
				sc->sc_battery.value[i] = 0;
		}
		vrpiu_calc_powerstate(sc);
	}
	vrpiu_write(sc, PIUINT_REG_W, AD_INTR);

	return;
}
/*
 * PIU TP interrupt handler.
 */
void
vrpiu_tp_intr(struct vrpiu_softc *sc)
{
	unsigned int cnt, i;
	unsigned int intrstat, page;
	int tpx0, tpx1, tpy0, tpy1;
	int x, y, xraw, yraw;

	tpx0 = tpx1 = tpy0 = tpy1 = 0;	/* XXX: gcc -Wuninitialized */

	intrstat = vrpiu_read(sc, PIUINT_REG_W);

	if (sc->sc_tpstat == VRPIU_TP_STAT_DISABLE) {
		/*
		 * the device isn't enabled. just clear interrupt.
		 */
		vrpiu_write(sc, PIUINT_REG_W, intrstat & TP_INTR);
		return;
	}

	page = (intrstat & PIUINT_OVP) ? 1 : 0;
	if (intrstat & (PIUINT_PADPAGE0INTR | PIUINT_PADPAGE1INTR)) {
		tpx0 = vrpiu_buf_read(sc, PIUPB(page, 0));
		tpx1 = vrpiu_buf_read(sc, PIUPB(page, 1));
		tpy0 = vrpiu_buf_read(sc, PIUPB(page, 2));
		tpy1 = vrpiu_buf_read(sc, PIUPB(page, 3));
	}

	if (intrstat & PIUINT_PADDLOSTINTR) {
		page = page ? 0 : 1;
		for (i = 0; i < 4; i++)
			vrpiu_buf_read(sc, PIUPB(page, i));
	}

	cnt = vrpiu_read(sc, PIUCNT_REG_W);
#ifdef DEBUG
	if (vrpiu_debug)
		vrpiu_dump_cntreg(cnt);
#endif

	/* clear interrupt status */
	vrpiu_write(sc, PIUINT_REG_W, intrstat & TP_INTR);

#if 0
	DPRINTF(("vrpiu_intr: OVP=%d", page));
	if (intrstat & PIUINT_PADCMDINTR)
		DPRINTF((" CMD"));
	if (intrstat & PIUINT_PADADPINTR)
		DPRINTF((" A/D"));
	if (intrstat & PIUINT_PADPAGE1INTR)
		DPRINTF((" PAGE1"));
	if (intrstat & PIUINT_PADPAGE0INTR)
		DPRINTF((" PAGE0"));
	if (intrstat & PIUINT_PADDLOSTINTR)
		DPRINTF((" DLOST"));
	if (intrstat & PIUINT_PENCHGINTR)
		DPRINTF((" PENCHG"));
	DPRINTF(("\n"));
#endif
	if (intrstat & (PIUINT_PADPAGE0INTR | PIUINT_PADPAGE1INTR)) {
		/*
		 * just ignore scan data if status isn't Touch.
		 */
		if (sc->sc_tpstat == VRPIU_TP_STAT_TOUCH) {
			/* reset tp scan timeout	*/
			callout_reset(&sc->sc_tptimeout, VRPIU_TP_SCAN_TIMEOUT,
			    vrpiu_tp_timeout, sc);

			if (!((tpx0 & PIUPB_VALID) && (tpx1 & PIUPB_VALID) &&
			    (tpy0 & PIUPB_VALID) && (tpy1 & PIUPB_VALID))) {
				printf("vrpiu: internal error,"
				    " data is not valid!\n");
			} else {
				tpx0 &= sc->sc_pb_paddata_mask;
				tpx1 &= sc->sc_pb_paddata_mask;
				tpy0 &= sc->sc_pb_paddata_mask;
				tpy1 &= sc->sc_pb_paddata_mask;
#define ISVALID(n, c)	((c) - (c)/5 < (n) && (n) < (c) + (c)/5)
				if (ISVALID(tpx0 + tpx1, sc->sc_pb_paddata_max) &&
				    ISVALID(tpy0 + tpy1, sc->sc_pb_paddata_max)) {
#if 0
					DPRINTF(("%04x %04x %04x %04x\n",
					    tpx0, tpx1, tpy0, tpy1));
					DPRINTF(("%3d %3d (%4d %4d)->", tpx0,
					    tpy0, tpx0 + tpx1, tpy0 + tpy1));
#endif
					xraw = tpy1 * sc->sc_pb_paddata_max / (tpy0 + tpy1);
					yraw = tpx1 * sc->sc_pb_paddata_max / (tpx0 + tpx1);
					DPRINTF(("%3d %3d", xraw, yraw));

					tpcalib_trans(&sc->sc_tpcalib, xraw,
					    yraw, &x, &y);

					DPRINTF(("->%4d %4d", x, y));
					wsmouse_input(sc->sc_wsmousedev,
					    1, /* button 0 down */
					    x, /* x */
					    y, /* y */
					    0, /* z */
					    0, /* w */
					    WSMOUSE_INPUT_ABSOLUTE_X |
					    WSMOUSE_INPUT_ABSOLUTE_Y);
					DPRINTF(("\n"));
				}
			}
		}
	}

	if (cnt & PIUCNT_PENSTC) {
		if (sc->sc_tpstat == VRPIU_TP_STAT_RELEASE) {
			/*
			 * pen touch
			 */
			DPRINTF(("PEN TOUCH\n"));
			sc->sc_tpstat = VRPIU_TP_STAT_TOUCH;
			/*
			 * We should not report button down event while
			 * we don't know where it occur.
			 */

			/* set tp scan timeout	*/
			callout_reset(&sc->sc_tptimeout, VRPIU_TP_SCAN_TIMEOUT,
			    vrpiu_tp_timeout, sc);
		}
	} else {
		vrpiu_tp_up(sc);
	}

	if (intrstat & PIUINT_PADDLOSTINTR) {
		cnt |= PIUCNT_PIUSEQEN;
		vrpiu_write(sc, PIUCNT_REG_W, cnt);
	}

	return;
}

void
vrpiu_tp_up(struct vrpiu_softc *sc)
{
	if (sc->sc_tpstat == VRPIU_TP_STAT_TOUCH) {
		/*
		 * pen release
		 */
		DPRINTF(("RELEASE\n"));
		sc->sc_tpstat = VRPIU_TP_STAT_RELEASE;

		/* clear tp scan timeout	*/
		callout_stop(&sc->sc_tptimeout);

		/* button 0 UP */
		wsmouse_input(sc->sc_wsmousedev, 0, 0, 0, 0, 0, 0);
	}
}

/* touch panel timeout handler */
void
vrpiu_tp_timeout(void *v)
{
	struct vrpiu_softc *sc = (struct vrpiu_softc *)v;

#ifdef VRPIUDEBUG
	{
		unsigned int cnt = vrpiu_read(sc, PIUCNT_REG_W);
		DPRINTF(("TIMEOUT: stat=%s  reg=%s\n",
		    (sc->sc_tpstat == VRPIU_TP_STAT_TOUCH)?"touch":"release",
		    (cnt & PIUCNT_PENSTC)?"touch":"release"));
	}
#endif
	vrpiu_tp_up(sc);
}

/*
 * PIU interrupt handler.
 */
int
vrpiu_intr(void *arg)
{
        struct vrpiu_softc *sc = arg;

	vrpiu_ad_intr(sc);
	vrpiu_tp_intr(sc);

	return 0;
}

void
vrpiu_start_powerstate(void *v)
{
	int mask;
	struct vrpiu_softc *sc = (struct vrpiu_softc *)v;

	vrpiu_ad_enable(sc);
	mask = vrpiu_read(sc, PIUAMSK_REG_W);
	mask &= 0xff8f; /* XXX */
	vrpiu_write(sc, PIUAMSK_REG_W, mask);
	vrpiu_write(sc, PIUASCN_REG_W, PIUACN_ADPSSTART);
	/*
	 * restart next A/D polling
	 */
	callout_reset(&sc->sc_adpoll, hz*vrpiu_ad_poll_interval,
	    vrpiu_start_powerstate, sc);
}

void
vrpiu_calc_powerstate(struct vrpiu_softc *sc)
{
	extern void vrgiu_diff_io(void);
	vrpiu_ad_disable(sc);
	VPRINTF(("vrpiu:AD: %d, %d, %d\n",
	    sc->sc_battery.value[0],
	    sc->sc_battery.value[1],
	    sc->sc_battery.value[2]));
	sc->sc_battery.nextpoll = hz*vrpiu_ad_poll_interval;
	vrpiu_send_battery_event(sc);
	/*
	 * restart next A/D polling if change polling timming.
	 */
	if (sc->sc_battery.nextpoll != hz*vrpiu_ad_poll_interval)
		callout_reset(&sc->sc_adpoll, sc->sc_battery.nextpoll,
		    vrpiu_start_powerstate, sc);
	if (bootverbose)
		vrgiu_diff_io();

}

static void
vrpiu_power(int why, void *arg)
{
	struct vrpiu_softc *sc = arg;

	switch (why) {
	case PWR_STANDBY:
	case PWR_SUSPEND:
		break;
	case PWR_RESUME:
		callout_reset(&sc->sc_adpoll, hz,
		    vrpiu_start_powerstate, sc);
		break;
	}
}

static void
vrpiu_send_battery_event(struct vrpiu_softc *sc)
{
#ifdef VRPIU_ADHOC_BATTERY_EVENT
	static int batteryhigh = 0;
	static int batterylow = 0;
	static int critical = 0;

	if (sc->sc_battery_spec == NULL
	    || sc->sc_battery_spec->main_port == -1)
		return;

	if (sc->sc_battery.value[sc->sc_battery_spec->main_port]
	    <= sc->sc_battery_spec->dc_critical) {
		batteryhigh = 0;
		config_hook_call(CONFIG_HOOK_PMEVENT,
		    CONFIG_HOOK_PMEVENT_BATTERY,
		    (void *)CONFIG_HOOK_BATT_CRITICAL);
		batterylow = 3;
		if (critical) {
			config_hook_call(CONFIG_HOOK_PMEVENT,
			    CONFIG_HOOK_PMEVENT_SUSPENDREQ,
			    (void *)0);
			critical = 0;
			batterylow = 0;
		}
		critical++;
	} else if (sc->sc_battery.value[sc->sc_battery_spec->main_port]
	    <= sc->sc_battery_spec->dc_20p) {
		batteryhigh = 0;
		if (batterylow == 1)
			config_hook_call(CONFIG_HOOK_PMEVENT,
			    CONFIG_HOOK_PMEVENT_BATTERY,
			    (void *)CONFIG_HOOK_BATT_20P);
		config_hook_call(CONFIG_HOOK_PMEVENT,
		    CONFIG_HOOK_PMEVENT_BATTERY,
		    (void *)CONFIG_HOOK_BATT_LOW);
		batterylow = 2;
	} else if (sc->sc_battery.value[sc->sc_battery_spec->main_port]
	    <= sc->sc_battery_spec->dc_50p) {
		batteryhigh = 0;
		if (batterylow == 0) {
			batterylow = 1;
			config_hook_call(CONFIG_HOOK_PMEVENT,
			    CONFIG_HOOK_PMEVENT_BATTERY,
			    (void *)CONFIG_HOOK_BATT_50P);
		}
	} else if (sc->sc_battery.value[sc->sc_battery_spec->main_port]
	    >= sc->sc_battery_spec->ac_80p) {
		batterylow = 0;
		if (batteryhigh == 0) {
			batteryhigh = 1;
			config_hook_call(CONFIG_HOOK_PMEVENT,
			    CONFIG_HOOK_PMEVENT_BATTERY,
			    (void *)CONFIG_HOOK_BATT_80P);
			config_hook_call(CONFIG_HOOK_PMEVENT,
			    CONFIG_HOOK_PMEVENT_BATTERY,
			    (void *)CONFIG_HOOK_BATT_HIGH);
		}
	}
#else /* VRPIU_ADHOC_BATTERY_EVENT */
	config_hook_call(CONFIG_HOOK_SET,
	    CONFIG_HOOK_BATTERYVAL,
	    (void *)&sc->sc_battery);
#endif /* VRPIU_ADHOC_BATTERY_EVENT */
}

#ifdef DEBUG
void
vrpiu_dump_cntreg(unsigned int cnt)
{
	printf("%s", (cnt & PIUCNT_PENSTC) ? "Touch" : "Release");
	printf(" state=");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_CmdScan)
		printf("CmdScan");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_IntervalNextScan)
		printf("IntervalNextScan");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_PenDataScan)
		printf("PenDataScan");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_WaitPenTouch)
		printf("WaitPenTouch");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_RFU)
		printf("???");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_ADPortScan)
		printf("ADPortScan");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_Standby)
		printf("Standby");
	if ((cnt & PIUCNT_PADSTATE_MASK) == PIUCNT_PADSTATE_Disable)
		printf("Disable");
	if (cnt & PIUCNT_PADATSTOP)
		printf(" AutoStop");
	if (cnt & PIUCNT_PADATSTART)
		printf(" AutoStart");
	if (cnt & PIUCNT_PADSCANSTOP)
		printf(" Stop");
	if (cnt & PIUCNT_PADSCANSTART)
		printf(" Start");
	if (cnt & PIUCNT_PADSCANTYPE)
		printf(" ScanPressure");
	if ((cnt & PIUCNT_PIUMODE_MASK) == PIUCNT_PIUMODE_ADCONVERTER)
		printf(" A/D");
	if ((cnt & PIUCNT_PIUMODE_MASK) == PIUCNT_PIUMODE_COORDINATE)
		printf(" Coordinate");
	if (cnt & PIUCNT_PIUSEQEN)
		printf(" SeqEn");
	if ((cnt & PIUCNT_PIUPWR) == 0)
		printf(" PowerOff");
	if ((cnt & PIUCNT_PADRST) == 0)
		printf(" Reset");
	printf("\n");
}
#endif