1 /* $NetBSD: tpcalib.c,v 1.13 2019/07/09 12:55:45 ryoon 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 1.13 2019/07/09 12:55:45 ryoon 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)
57
58 int
tpcalib_init(struct tpcalib_softc * sc)59 tpcalib_init(struct tpcalib_softc *sc)
60 {
61 tpcalib_reset(sc);
62 return (0);
63 }
64
65 void
tpcalib_reset(struct tpcalib_softc * sc)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
tpcalib_trans(struct tpcalib_softc * sc,int rawx,int rawy,int * x,int * y)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
tpcalib_ioctl(struct tpcalib_softc * sc,u_long cmd,void * data,int flag,struct lwp * l)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 }
105 if (d->samplelen > 0) {
106 if (mra_Y_AX1_BX2_C(&d->samples[0].x, s,
107 &d->samples[0].rawx, s,
108 &d->samples[0].rawy, s,
109 d->samplelen, SCALE,
110 &sc->sc_ax, &sc->sc_bx, &sc->sc_cx) ||
111 mra_Y_AX1_BX2_C(&d->samples[0].y, s,
112 &d->samples[0].rawx, s,
113 &d->samples[0].rawy, s,
114 d->samplelen, SCALE,
115 &sc->sc_ay, &sc->sc_by, &sc->sc_cy)) {
116 printf("tpcalib: MRA error");
117 tpcalib_reset(sc);
118
119 return (EINVAL);
120 }
121 }
122 sc->sc_minx = d->minx;
123 sc->sc_maxx = d->maxx;
124 sc->sc_miny = d->miny;
125 sc->sc_maxy = d->maxy;
126 sc->sc_saved = *d;
127 DPRINTF(("tpcalib: x=%d~%d y=%d~%d\n",
128 sc->sc_minx, sc->sc_maxx,
129 sc->sc_miny, sc->sc_maxy));
130 DPRINTF(("tpcalib: Ax=%d Bx=%d Cx=%d\n",
131 sc->sc_ax, sc->sc_bx, sc->sc_cx));
132 DPRINTF(("tpcalib: Ay=%d By=%d Cy=%d\n",
133 sc->sc_ay, sc->sc_by, sc->sc_cy));
134
135 break;
136
137 case WSMOUSEIO_GCALIBCOORDS:
138 *(struct wsmouse_calibcoords *)data = sc->sc_saved;
139 break;
140
141 default:
142 return (EPASSTHROUGH);
143 }
144 return (0);
145 }
146