tpcalib.c revision 1.9
1/* $NetBSD: tpcalib.c,v 1.9 2006/10/12 01:32:06 christos 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 AUTHOR 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 AUTHOR 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 1.9 2006/10/12 01:32:06 christos Exp $"); 32 33#ifdef _KERNEL_OPT 34#include "opt_tpcalib.h" 35#endif 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/device.h> 40#include <sys/kernel.h> 41#include <dev/wscons/wsconsio.h> 42#include <dev/wscons/tpcalibvar.h> 43 44#ifdef TPCALIBDEBUG 45int tpcalib_debug = 0; 46#define DPRINTF(arg) if (tpcalib_debug) printf arg; 47#else 48#define DPRINTF(arg) 49#endif 50 51/* mra is defined in mra.c */ 52extern int mra_Y_AX1_BX2_C(const int *, int, 53 const int *, int, const int *, int, int, int, 54 int *, int *, int *); 55 56#define SCALE (1024*256) 57 58int 59tpcalib_init(struct tpcalib_softc *sc) 60{ 61 tpcalib_reset(sc); 62 return (0); 63} 64 65void 66tpcalib_reset(struct tpcalib_softc *sc) 67{ 68 /* This indicate 'raw mode'. No translation will be done. */ 69 sc->sc_saved.samplelen = WSMOUSE_CALIBCOORDS_RESET; 70} 71 72void 73tpcalib_trans(struct tpcalib_softc *sc, int rawx, int rawy, int *x, int *y) 74{ 75 if (sc->sc_saved.samplelen == WSMOUSE_CALIBCOORDS_RESET) { 76 /* This indicate 'raw mode'. No translation will be done. */ 77 *x = rawx; 78 *y = rawy; 79 } else { 80 *x = (sc->sc_ax * rawx + sc->sc_bx * rawy) / SCALE + sc->sc_cx; 81 *y = (sc->sc_ay * rawx + sc->sc_by * rawy) / SCALE + sc->sc_cy; 82 if (*x < sc->sc_minx) *x = sc->sc_minx; 83 if (*y < sc->sc_miny) *y = sc->sc_miny; 84 if (sc->sc_maxx < *x) 85 *x = sc->sc_maxx; 86 if (sc->sc_maxy < *y) 87 *y = sc->sc_maxy; 88 } 89} 90 91int 92tpcalib_ioctl(struct tpcalib_softc *sc, u_long cmd, caddr_t data, 93 int flag __unused, struct lwp *l __unused) 94{ 95 const struct wsmouse_calibcoords *d; 96 int s; 97 98 switch (cmd) { 99 case WSMOUSEIO_SCALIBCOORDS: 100 s = sizeof(struct wsmouse_calibcoord); 101 d = (const struct wsmouse_calibcoords *)data; 102 if (d->samplelen == WSMOUSE_CALIBCOORDS_RESET) { 103 tpcalib_reset(sc); 104 } else 105 if (mra_Y_AX1_BX2_C(&d->samples[0].x, s, 106 &d->samples[0].rawx, s, 107 &d->samples[0].rawy, s, 108 d->samplelen, SCALE, 109 &sc->sc_ax, &sc->sc_bx, &sc->sc_cx) || 110 mra_Y_AX1_BX2_C(&d->samples[0].y, s, 111 &d->samples[0].rawx, s, 112 &d->samples[0].rawy, s, 113 d->samplelen, SCALE, 114 &sc->sc_ay, &sc->sc_by, &sc->sc_cy)) { 115 printf("tpcalib: MRA error"); 116 tpcalib_reset(sc); 117 118 return (EINVAL); 119 } else { 120 sc->sc_minx = d->minx; 121 sc->sc_maxx = d->maxx; 122 sc->sc_miny = d->miny; 123 sc->sc_maxy = d->maxy; 124 sc->sc_saved = *d; 125 DPRINTF(("tpcalib: x=%d~%d y=%d~%d\n", 126 sc->sc_minx, sc->sc_maxx, 127 sc->sc_miny, sc->sc_maxy)); 128 DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n", 129 sc->sc_ax, sc->sc_bx, sc->sc_cx)); 130 DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n", 131 sc->sc_ay, sc->sc_by, sc->sc_cy)); 132 } 133 break; 134 135 case WSMOUSEIO_GCALIBCOORDS: 136 *(struct wsmouse_calibcoords *)data = sc->sc_saved; 137 break; 138 139 default: 140 return (EPASSTHROUGH); 141 } 142 return (0); 143} 144