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tpcalib.c revision 1.4 
      1 /*	$NetBSD: tpcalib.c,v 1.4 2005/05/31 23:37:47 uwe Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999-2003 TAKEMURA Shin All rights reserved.
      5  * Copyright (c) 1999 PocketBSD Project. All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: tpcalib.c,v 1.4 2005/05/31 23:37:47 uwe Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 #include <sys/kernel.h>
     37 #include <dev/wscons/wsconsio.h>
     38 #include <dev/wscons/tpcalibvar.h>
     39 
     40 #define TPCALIBDEBUG
     41 #ifdef TPCALIBDEBUG
     42 int	tpcalib_debug = 0;
     43 #define	DPRINTF(arg) if (tpcalib_debug) printf arg;
     44 #else
     45 #define	DPRINTF(arg)
     46 #endif
     47 
     48 /* mra is defined in mra.c */
     49 extern int mra_Y_AX1_BX2_C(int *, int, int *, int, int *, int, int, int, int *,
     50     int *, int *);
     51 
     52 #define SCALE	(1024*256)
     53 
     54 int
     55 tpcalib_init(struct tpcalib_softc *sc)
     56 {
     57 	tpcalib_reset(sc);
     58 	return (0);
     59 }
     60 
     61 void
     62 tpcalib_reset(struct tpcalib_softc *sc)
     63 {
     64 	/* This indicate 'raw mode'. No translation will be done. */
     65 	sc->sc_saved.samplelen = WSMOUSE_CALIBCOORDS_RESET;
     66 }
     67 
     68 void
     69 tpcalib_trans(struct tpcalib_softc *sc, int rawx, int rawy, int *x, int *y)
     70 {
     71 	if (sc->sc_saved.samplelen == WSMOUSE_CALIBCOORDS_RESET) {
     72 		/* This indicate 'raw mode'. No translation will be done. */
     73 		*x = rawx;
     74 		*y = rawy;
     75 	} else {
     76 		*x = (sc->sc_ax * rawx + sc->sc_bx * rawy) / SCALE + sc->sc_cx;
     77 		*y = (sc->sc_ay * rawx + sc->sc_by * rawy) / SCALE + sc->sc_cy;
     78 		if (*x < sc->sc_minx) *x = sc->sc_minx;
     79 		if (*y < sc->sc_miny) *y = sc->sc_miny;
     80 		if (sc->sc_maxx < *x)
     81 			*x = sc->sc_maxx;
     82 		if (sc->sc_maxy < *y)
     83 			*y = sc->sc_maxy;
     84 	}
     85 }
     86 
     87 int
     88 tpcalib_ioctl(struct tpcalib_softc *sc, u_long cmd, caddr_t data, int flag,
     89     struct proc *p)
     90 {
     91 	struct wsmouse_calibcoords *d;
     92 	int s;
     93 
     94 	switch (cmd) {
     95 	case WSMOUSEIO_SCALIBCOORDS:
     96 		s = sizeof(struct wsmouse_calibcoord);
     97 		d = (struct wsmouse_calibcoords *)data;
     98 		if (d->samplelen == WSMOUSE_CALIBCOORDS_RESET) {
     99 			tpcalib_reset(sc);
    100 		} else
    101 			if (mra_Y_AX1_BX2_C(&d->samples[0].x, s,
    102 				    &d->samples[0].rawx, s,
    103 				    &d->samples[0].rawy, s,
    104 				    d->samplelen, SCALE,
    105 				    &sc->sc_ax, &sc->sc_bx, &sc->sc_cx) ||
    106 			    mra_Y_AX1_BX2_C(&d->samples[0].y, s,
    107 				    &d->samples[0].rawx, s,
    108 				    &d->samples[0].rawy, s,
    109 				    d->samplelen, SCALE,
    110 				    &sc->sc_ay, &sc->sc_by, &sc->sc_cy)) {
    111 				printf("tpcalib: MRA error");
    112 				tpcalib_reset(sc);
    113 
    114 				return (EINVAL);
    115 			} else {
    116 				sc->sc_minx = d->minx;
    117 				sc->sc_maxx = d->maxx;
    118 				sc->sc_miny = d->miny;
    119 				sc->sc_maxy = d->maxy;
    120 				sc->sc_saved = *d;
    121 				DPRINTF(("tpcalib: x=%d~%d y=%d~%d\n",
    122 				    sc->sc_minx, sc->sc_maxx,
    123 				    sc->sc_miny, sc->sc_maxy));
    124 				DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n",
    125 				    sc->sc_ax, sc->sc_bx, sc->sc_cx));
    126 				DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n",
    127 				    sc->sc_ay, sc->sc_by, sc->sc_cy));
    128 			}
    129 		break;
    130 
    131 	case WSMOUSEIO_GCALIBCOORDS:
    132 		d = (struct wsmouse_calibcoords *)data;
    133 		*d = sc->sc_saved;
    134 		break;
    135 
    136 	default:
    137 		return (EPASSTHROUGH);
    138 	}
    139 	return (0);
    140 }
    141