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/*
* $RCSId: xc/programs/Xserver/hw/kdrive/linux/ts.c,v 1.9 2002/08/15 18:07:48 keithp Exp $
*
* 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.
*/
#define NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "kdrive.h"
#include "Xpoll.h"
#include <sys/ioctl.h>
#if 1
#include <linux/h3600_ts.h> /* touch screen events */
#else
/* inline for non-arm debug builds */
typedef struct {
unsigned short pressure;
unsigned short x;
unsigned short y;
unsigned short pad; /* TODO TODO word boundary pad */
} TS_EVENT;
#endif
static long lastx = 0, lasty = 0;
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;
}
void
TsRead (int tsPort, void *closure)
{
KdMouseInfo *mi = closure;
int fd = (int) mi->driver;
TS_EVENT event;
long buf[3];
int n;
long pressure;
long x, y;
unsigned long flags;
unsigned long buttons;
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 (KdTsCurScreen == 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;
}
KdEnqueueMouseEvent (mi, flags, x, y);
}
}
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]))
int TsInputType;
int
TsInit (void)
{
int i;
int fd;
KdMouseInfo *mi, *next;
int n = 0;
if (!TsInputType)
TsInputType = KdAllocInputType ();
for (mi = kdMouseInfo; mi; mi = next)
{
next = mi->next;
if (mi->inputType)
continue;
if (!mi->name)
{
for (i = 0; i < NUM_TS_NAMES; i++)
{
fd = open (TsNames[i], 0);
if (fd >= 0)
{
mi->name = KdSaveString (TsNames[i]);
break;
}
}
}
else
fd = open (mi->name, 0);
if (fd >= 0)
{
struct h3600_ts_calibration cal;
/*
* Check to see if this is a touch screen
*/
if (ioctl (fd, TS_GET_CAL, &cal) != -1)
{
mi->driver = (void *) fd;
mi->inputType = TsInputType;
if (KdRegisterFd (TsInputType, fd, TsRead, (void *) mi))
n++;
}
else
close (fd);
}
}
}
void
TsFini (void)
{
KdMouseInfo *mi;
KdUnregisterFds (TsInputType, TRUE);
for (mi = kdMouseInfo; mi; mi = mi->next)
{
if (mi->inputType == TsInputType)
{
mi->driver = 0;
mi->inputType = 0;
}
}
}
KdMouseFuncs TsFuncs = {
TsInit,
TsFini
};
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