/* $NetBSD: tpcalib.c,v 1.13 2019/07/09 12:55:45 ryoon Exp $ */
/*
* Copyright (c) 1999-2003 TAKEMURA Shin All rights reserved.
* Copyright (c) 1999 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 AUTHOR 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 AUTHOR 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.
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tpcalib.c,v 1.13 2019/07/09 12:55:45 ryoon Exp $");
#ifdef _KERNEL_OPT
#include "opt_tpcalib.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/tpcalibvar.h>
#ifdef TPCALIBDEBUG
int tpcalib_debug = 0;
#define DPRINTF(arg) if (tpcalib_debug) printf arg;
#else
#define DPRINTF(arg)
#endif
/* mra is defined in mra.c */
extern int mra_Y_AX1_BX2_C(const int *, int,
const int *, int, const int *, int, int, int,
int *, int *, int *);
#define SCALE (1024)
int
tpcalib_init(struct tpcalib_softc *sc)
{
tpcalib_reset(sc);
return (0);
}
void
tpcalib_reset(struct tpcalib_softc *sc)
{
/* This indicate 'raw mode'. No translation will be done. */
sc->sc_saved.samplelen = WSMOUSE_CALIBCOORDS_RESET;
}
void
tpcalib_trans(struct tpcalib_softc *sc, int rawx, int rawy, int *x, int *y)
{
if (sc->sc_saved.samplelen == WSMOUSE_CALIBCOORDS_RESET) {
/* This indicate 'raw mode'. No translation will be done. */
*x = rawx;
*y = rawy;
} else {
*x = (sc->sc_ax * rawx + sc->sc_bx * rawy) / SCALE + sc->sc_cx;
*y = (sc->sc_ay * rawx + sc->sc_by * rawy) / SCALE + sc->sc_cy;
if (*x < sc->sc_minx) *x = sc->sc_minx;
if (*y < sc->sc_miny) *y = sc->sc_miny;
if (sc->sc_maxx < *x)
*x = sc->sc_maxx;
if (sc->sc_maxy < *y)
*y = sc->sc_maxy;
}
}
int
tpcalib_ioctl(struct tpcalib_softc *sc, u_long cmd, void *data,
int flag, struct lwp *l)
{
const struct wsmouse_calibcoords *d;
int s;
switch (cmd) {
case WSMOUSEIO_SCALIBCOORDS:
s = sizeof(struct wsmouse_calibcoord);
d = (const struct wsmouse_calibcoords *)data;
if (d->samplelen == WSMOUSE_CALIBCOORDS_RESET) {
tpcalib_reset(sc);
}
if (d->samplelen > 0) {
if (mra_Y_AX1_BX2_C(&d->samples[0].x, s,
&d->samples[0].rawx, s,
&d->samples[0].rawy, s,
d->samplelen, SCALE,
&sc->sc_ax, &sc->sc_bx, &sc->sc_cx) ||
mra_Y_AX1_BX2_C(&d->samples[0].y, s,
&d->samples[0].rawx, s,
&d->samples[0].rawy, s,
d->samplelen, SCALE,
&sc->sc_ay, &sc->sc_by, &sc->sc_cy)) {
printf("tpcalib: MRA error");
tpcalib_reset(sc);
return (EINVAL);
}
}
sc->sc_minx = d->minx;
sc->sc_maxx = d->maxx;
sc->sc_miny = d->miny;
sc->sc_maxy = d->maxy;
sc->sc_saved = *d;
DPRINTF(("tpcalib: x=%d~%d y=%d~%d\n",
sc->sc_minx, sc->sc_maxx,
sc->sc_miny, sc->sc_maxy));
DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n",
sc->sc_ax, sc->sc_bx, sc->sc_cx));
DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n",
sc->sc_ay, sc->sc_by, sc->sc_cy));
break;
case WSMOUSEIO_GCALIBCOORDS:
*(struct wsmouse_calibcoords *)data = sc->sc_saved;
break;
default:
return (EPASSTHROUGH);
}
return (0);
}