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/*
* 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,
};
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