| 1 | /* $NetBSD: tpcalib.c,v 1.11 2007/03/04 06:02:51 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 1.11 2007/03/04 06:02:51 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 |
| 45 | int 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 */ |
| 52 | extern 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 | |
| 58 | int |
| 59 | tpcalib_init(struct tpcalib_softc *sc) |
| 60 | { |
| 61 | tpcalib_reset(sc); |
| 62 | return (0); |
| 63 | } |
| 64 | |
| 65 | void |
| 66 | tpcalib_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 | |
| 72 | void |
| 73 | tpcalib_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 | |
| 91 | int |
| 92 | tpcalib_ioctl(struct tpcalib_softc *sc, u_long cmd, void *data, |
| 93 | int flag, struct lwp *l) |
| 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 | |