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
42int	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 */
49extern 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
54int
55tpcalib_init(struct tpcalib_softc *sc)
56{
57	tpcalib_reset(sc);
58	return (0);
59}
60
61void
62tpcalib_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
68void
69tpcalib_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
87int
88tpcalib_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