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/*
* Id: ts.c,v 1.1 1999/11/02 18:39:28 keithp Exp $
*
* Copyright © 1999 Keith Packard
*
* 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 not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS 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.
*/
/* $XFree86: xc/programs/Xserver/hw/kdrive/itsy/ts.c,v 1.1 1999/11/19 13:53:54 hohndel Exp $ */
#define NEED_EVENTS
#include "itsy.h"
#include "Xproto.h"
#include "inputstr.h"
#include "Xpoll.h"
int
itsyTsReadBytes (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
itsyTsRead (int tsPort)
{
ts_event event;
long buf[3];
int n;
long pressure;
long x, y;
unsigned long flags;
unsigned long buttons;
n = itsyTsReadBytes (tsPort, (char *) &event,
sizeof (event), sizeof (event));
if (n == sizeof (event))
{
if (event.pressure)
{
flags = KD_BUTTON_1;
x = event.point.x;
y = event.point.y;
}
else
{
flags = KD_MOUSE_DELTA;
x = 0;
y = 0;
}
KdEnqueueMouseEvent (flags, x, y);
}
}
#if 0
#define ITSY_DEBUG_LOW 1
//
// Touch screen parameters are stored
// in the flash. This code is taken from 'wm1'.
//
void itsySetTouchCalibration (int mou_filedsc,
int xs, int xt, int ys, int yt, int xys)
{
int k, ibuf[10];
ibuf[0] = xs;
ibuf[1] = xt;
ibuf[2] = ys;
ibuf[3] = yt;
ibuf[4] = xys;
if ((k=ioctl(mou_filedsc, TS_SET_CALM, ibuf)) != 0) {
fprintf(stderr, "ERROR: ioctl TS_SET_CALM returns %d\n", k);
}
}
int itsyReadFlashBlock(int location, signed char *data, int dbytes)
{
int offset, bytes;
int flashfd;
flashfd = open("/dev/flash1", O_RDONLY);
if (flashfd < 0) return(0);
offset = lseek(flashfd, location, SEEK_SET);
if (offset != location) {
close(flashfd);
return(0);
}
bytes = read(flashfd, data, dbytes);
if (bytes != dbytes) {
close(flashfd);
return(0);
}
close(flashfd);
return(1);
}
/**********************************************************************/
#define RAMSIZE (0x400000)
#define MONITOR_BLOCKSIZE (32)
/**********************************************************************/
/* code for storing calibration into flash */
#define CALIBRATE_BLOCKSIZE (32)
#define CALIBRATE_OFFSET (RAMSIZE-MONITOR_BLOCKSIZE-CALIBRATE_BLOCKSIZE)
#define CALIBRATE_MAGIC_NUM (0x0babedee)
static int check_if_calibrated_and_set(int mou_filedsc)
{
signed char cal_data[CALIBRATE_BLOCKSIZE];
int *iptr;
if (itsyReadFlashBlock(CALIBRATE_OFFSET,
cal_data, CALIBRATE_BLOCKSIZE) == 0) {
if ( ITSY_DEBUG_LOW ) {
fprintf(stderr,"unable to read calibration data for touch screen\n");
}
return(0);
}
iptr = (int *) cal_data;
if (iptr[0] == CALIBRATE_MAGIC_NUM) {
if ( ITSY_DEBUG_LOW ) {
fprintf(stderr,"Calibrating touch screen using %d, %d, %d, %d, %d\n",
iptr[1], iptr[2], iptr[3], iptr[4], iptr[5]);
}
itsySetTouchCalibration(mou_filedsc, iptr[1], iptr[2], iptr[3], iptr[4], iptr[5]);
return(1);
}
else {
if ( ITSY_DEBUG_LOW ) {
fprintf(stderr,"Couldn't calibrate screen\n");
}
return(0);
}
}
#endif
int
itsyTsInit (void)
{
int tsPort;
tsPort = open ("/dev/ts", 0);
fprintf (stderr, "tsPort %d\n", tsPort);
#if 0
if (tsPort >= 0)
check_if_calibrated_and_set (tsPort);
#endif
return tsPort;
}
void
itsyTsFini (int tsPort)
{
if (tsPort >= 0)
close (tsPort);
}
KdMouseFuncs itsyTsMouseFuncs = {
itsyTsInit,
itsyTsRead,
itsyTsFini
};
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