summaryrefslogtreecommitdiff
path: root/hw/kdrive/linux/ts.c
blob: 831953f02320dac3b0bc4307fe43853a55e62dfe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
 * Derived from ps2.c by Jim Gettys
 *
 * Copyright © 1999 Keith Packard
 * Copyright © 2000 Compaq Computer Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard or Compaq not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard and Compaq makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD AND COMPAQ DISCLAIM ALL WARRANTIES WITH REGARD TO THIS 
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, 
 * IN NO EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#define NEED_EVENTS
#include <X11/X.h>
#include <X11/Xproto.h>
#include <X11/Xpoll.h>
#include "inputstr.h"
#include "scrnintstr.h"
#include "kdrive.h"
#include <sys/ioctl.h>
#include <linux/h3600_ts.h>	/* touch screen events */

static long lastx = 0, lasty = 0;

int KdTsPhyScreen = 0;

static int
TsReadBytes (int fd, char *buf, int len, int min)
{
    int		    n, tot;
    fd_set	    set;
    struct timeval  tv;

    tot = 0;
    while (len)
    {
	n = read (fd, buf, len);
	if (n > 0)
	{
	    tot += n;
	    buf += n;
	    len -= n;
	}
	if (tot % min == 0)
	    break;
	FD_ZERO (&set);
	FD_SET (fd, &set);
	tv.tv_sec = 0;
	tv.tv_usec = 100 * 1000;
	n = select (fd + 1, &set, 0, 0, &tv);
	if (n <= 0)
	    break;
    }
    return tot;
}

static void
TsRead (int tsPort, void *closure)
{
    KdPointerInfo    *pi = closure;
    TS_EVENT	    event;
    int		    n;
    long	    x, y;
    unsigned long   flags;

    n = TsReadBytes (tsPort, (char *) &event, sizeof (event), sizeof (event));
    if (n == sizeof (event))  
    {
	if (event.pressure) 
	{
	    /* 
	     * HACK ATTACK.  (static global variables used !)
	     * Here we test for the touch screen driver actually being on the
	     * touch screen, if it is we send absolute coordinates. If not,
	     * then we send delta's so that we can track the entire vga screen.
	     */
	    if (KdCurScreen == KdTsPhyScreen) {
	    	flags = KD_BUTTON_1;
	    	x = event.x;
	    	y = event.y;
	    }
	    else
	      {
	    	flags = /* KD_BUTTON_1 |*/ KD_MOUSE_DELTA;
	    	if ((lastx == 0) || (lasty == 0)) {
	    	    x = 0;
	    	    y = 0;
	    	} else {
	    	    x = event.x - lastx;
	    	    y = event.y - lasty;
	    	}
	    	lastx = event.x;
	    	lasty = event.y;
	      }
	} else {
	    flags = KD_MOUSE_DELTA;
	    x = 0;
	    y = 0;
	    lastx = 0;
	    lasty = 0;
	}
	KdEnqueuePointerEvent (pi, flags, x, y, 0);
    }
}

char	*TsNames[] = {
  "/dev/ts",	
  "/dev/h3600_ts" /* temporary name; note this code can try
			   to open more than one device */
};

#define NUM_TS_NAMES	(sizeof (TsNames) / sizeof (TsNames[0]))

static Status
TsInit (KdPointerInfo *pi)
{
    int		i;
    int		fd;
    int		n = 0;

    if (!pi->path || strcmp(pi->path, "auto") == 0) {
        for (i = 0; i < NUM_TS_NAMES; i++)    {
            fd = open (TsNames[i], 0);
            if (fd >= 0) {
                pi->path = KdSaveString (TsNames[i]);
                break;
            }
	}
    }
    else {
        fd = open (pi->path, 0);
    }

    if (fd < 0) {
        ErrorF("TsInit: Couldn't open %s\n", pi->path);
        return BadMatch;
    }
    close(fd);

    pi->name = KdSaveString("H3600 Touchscreen");

    return Success;
}

static Status
TsEnable (KdPointerInfo *pi)
{
    int fd;

    if (!pi || !pi->path)
        return BadImplementation;

    fd = open(pi->path, 0);

    if (fd < 0) {
        ErrorF("TsInit: Couldn't open %s\n", pi->path);
        return BadMatch;
    }

    struct h3600_ts_calibration cal;
    /*
     * Check to see if this is a touch screen
     */
    if (ioctl (fd, TS_GET_CAL, &cal) != -1) {
	mi->driverPrivate = (void *) fd;
	if (!KdRegisterFd (fd, TsRead, (void *) mi)) {
            close(fd);
            return BadAlloc;
	}
    }
    else {
        ErrorF("TsEnable: %s is not a touchscreen\n", pi->path);
	close (fd);
        return BadMatch;
    }

    return Success;
}

static void
TsFini (KdPointerInfo *pi)
{
    KdUnregisterFds (pi, (int)pi->driverPrivate, TRUE);
    mi->driverPrivate = NULL;
}

KdPointerDriver TsDriver = {
    TsInit,
    TsEnable,
    TsDisable,
    TsFini,
    NULL,
};