/*** $Id: fft7202.c,v 1.1 2004/08/19 07:02:54 yaoyy Exp $**** fft7202.c: Low Level Input Engine for FFT 7202** ** Copyright (C) 2003, Feynman Software.**** The device driver of fft 7202 touch screen is compliant to** the Specification for Generic Touch Screen Driver.** Please see the file: spec_general_ts_drv.html in this directory.**** So this IAL engine can be a good template of your new IAL engines,** which compliant to the specification.**** Created by Yao yunyuan, 2001/08/20*//*** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program is distributed in the hope that it will be useful,** but WITHOUT ANY WARRANTY; without even the implied warranty of** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the** GNU General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include <stdio.h>#include <stdlib.h>#include <string.h>#include "common.h"#ifdef _FFT7202_IAL#include <unistd.h>#include <fcntl.h>#include <sys/ioctl.h>#include <sys/poll.h>#include <sys/types.h>#include <sys/stat.h>#include <linux/kd.h>#define TS_DEVICE   "/dev/ts"#include "ial.h"#include "fft7202.h"/* for data reading from /dev/ts */typedef struct {    short b;    short x;    short y;    short pad;} POS;static int ts = -1;static int mousex = 0;static int mousey = 0;static POS pos;#undef _DEBUG/************************  Low Level Input Operations **********************//* * Mouse operations -- Event */static int mouse_update(void){    return 1;}static void mouse_getxy(int *x, int* y){#ifdef _DEBUG    printf ("mousex = %d, mousey = %d\n", mousex, mousey);#endif    *x = mousex;    *y = mousey;}static int mouse_getbutton(void){    return pos.b;}#ifdef _LITE_VERSION static int wait_event (int which, int maxfd, fd_set *in, fd_set *out, fd_set *except,                struct timeval *timeout)#elsestatic int wait_event (int which, fd_set *in, fd_set *out, fd_set *except,                struct timeval *timeout)#endif{    fd_set rfds;    int    retvalue = 0;    int    e;    if (!in) {        in = &rfds;        FD_ZERO (in);    }    if ((which & IAL_MOUSEEVENT) && ts >= 0) {        FD_SET (ts, in);#ifdef _LITE_VERSION        if (ts > maxfd) maxfd = ts;#endif    }#ifdef _LITE_VERSION    e = select (maxfd + 1, in, out, except, timeout) ;#else    e = select (FD_SETSIZE, in, out, except, timeout) ;#endif    if (e > 0) {         if (ts >= 0 && FD_ISSET (ts, in)) {            short data [4];            FD_CLR (ts, in);            read (ts, data, sizeof (data));            if (data[0]) {                pos.x = data[1];                pos.y = data[2];            }            if (data[0]) {                printf ("mouse down: pos.x = %d, pos.y = %d\n", pos.x, pos.y);            }            pos.b = (data[0] ? 4 : 0);            retvalue |= IAL_MOUSEEVENT;        }    } else if (e < 0) {        return -1;    }    return retvalue;}BOOL InitFFTInput (INPUT* input, const char* mdev, const char* mtype){    ts = open (TS_DEVICE, O_RDONLY);    if (ts < 0) {        fprintf (stderr, "IPAQ: Can not open touch screen!\n");        return FALSE;    }    input->update_mouse = mouse_update;    input->get_mouse_xy = mouse_getxy;    input->set_mouse_xy = NULL;    input->get_mouse_button = mouse_getbutton;    input->set_mouse_range = NULL;    input->wait_event = wait_event;    mousex = 0;    mousey = 0;    pos.x = pos.y = pos.b = 0;        return TRUE;}void TermFFTInput (void){    if (ts >= 0)        close(ts);}#endif /* _FFT7202_IAL */