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/***********************************************************************
* File name: util.c *
* Written by: Bruce Kall *
* Created: 2/2000 (portions extracted from tpconfig.c) *
* Language: C *
* Version: 1.0 *
* Purpose: Utility functions for manipulating touchpads. *
* *
***********************************************************************/
/* Copyright (C) 1997 C. Scott Ananian <cananian@alumni.princeton.edu>
* Copyright (c) 1998-2001 Bruce Kalk <kall@compass.com>
*
* Currently maintained by: Bruce Kall, <kall@compass.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: utils.c,v 1.9 2002/02/22 20:35:42 bruce Exp $
*/
/*$Log: utils.c,v $
*Revision 1.9 2002/02/22 20:35:42 bruce
*Changed version number in message
*
*Revision 1.8 2001/04/23 20:37:25 bruce
*Changed version string.
*
*Revision 1.7 2000/11/15 15:41:34 bruce
*Added to time out message about kernel patch.
*
*Revision 1.6 2000/11/15 15:29:53 bruce
*Changed last modified message
*
*Revision 1.5 2000/10/31 18:57:29 cph
*Change timeout logic to use gettimeofday rather than deprecated ftime.
*Simplify debugging messages to make high-volume dump easier to scan.
*
*Revision 1.4 2000/10/31 18:04:24 cph
*Simplify byte-level I/O. Fix alignment bug in copyright output.
*
*Revision 1.3 2000/10/31 15:20:04 cph
*Add convenient byte-level I/O.
*
*Revision 1.2 2000/10/23 16:27:53 bruce
*Removed extraneuos code.
*
*Revision 1.1 2000/09/28 13:44:18 bruce
*Initial revision
**/
static char rcsid[]="$Header: /home/bruce/linux-stuff/tpconfig/tpconfig-3.1.3/RCS/utils.c,v 1.9 2002/02/22 20:35:42 bruce Exp $";
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <getopt.h>
#include <termios.h>
#include "tpconfig.h"
#define TRUE 1
#define FALSE 0
#define TIMEOUT 3.0 /* wait for up to 3 seconds for a reply*/
/* General Rourines for PS2 port */
int ps2_write(int fd,unsigned char *buffer,int num_bytes)
{ /* ps2_write */
int bytes_written;
struct timeval start;
struct timeval now;
int at;
int left;
int i;
if (DEBUG_LEVEL == DEBUG_HIGH)
fprintf (stderr, "PS2_write: %d bytes\n", num_bytes);
/* Use the temporary buffer to store the data as it arrives */
gettimeofday(&start, 0);
at = 0;
left = num_bytes;
if (DEBUG_LEVEL == DEBUG_HIGH)
{
fprintf (stderr, "PS2_write:");
for (i = 0; i < num_bytes; i++)
fprintf (stderr, " %#02x", *(buffer + i));
fprintf (stderr, "\n");
}
do
{
bytes_written = write(fd,(buffer + at),left);
if(bytes_written > 0)
{
left = left - bytes_written;
at = at + bytes_written;
}
gettimeofday(&now, 0);
if ((((((double) now.tv_sec) * 1000000.0 + ((double) now.tv_usec))
- (((double) start.tv_sec) * 1000000.0 + ((double) start.tv_usec)))
/ 1000000.0)
> TIMEOUT)
{
fprintf (stderr, "\nTimed out waiting to write to device.\n");
exit (-1);
}
}
while(left > 0);
if (DEBUG_LEVEL == DEBUG_HIGH)
fprintf (stderr, "PS2_write: done\n");
return(at);
} /* ps2_write */
int ps2_read(int fd,unsigned char *buffer,int num_bytes)
{ /* ps2_read */
int bytes_read;
struct timeval start;
struct timeval now;
int at;
int left;
int i;
if (DEBUG_LEVEL == DEBUG_HIGH)
fprintf (stderr, "PS2_read: %d bytes\n", num_bytes);
/* Use the temporary buffer to store the data as it arrives */
gettimeofday(&start, 0);
at = 0;
left = num_bytes;
do
{
bytes_read = read(fd,(buffer + at),left);
if(bytes_read > 0)
{
left = left - bytes_read;
at = at + bytes_read;
}
gettimeofday(&now, 0);
if ((((((double) now.tv_sec) * 1000000.0 + ((double) now.tv_usec))
- (((double) start.tv_sec) * 1000000.0 + ((double) start.tv_usec)))
/ 1000000.0)
> TIMEOUT)
{
fprintf (stderr, "\nTimed out waiting to read from device (is pc_keyb.c kernel patch installed?)\n");
exit (-1);
}
}
while(left > 0);
if (DEBUG_LEVEL == DEBUG_HIGH)
{
fprintf (stderr, "PS2_read:");
for (i = 0; i < at; i++)
fprintf (stderr, " %#2x", *(buffer + i));
fprintf (stderr, "\n");
fprintf (stderr, "PS2_read: read %d\n", at);
}
return(at);
} /* ps2_read */
void copyright(void)
{
printf("\n");
printf(" tpconfig version: %s\n", VERSION);
printf("\n");
printf(" Synaptics Touchpad and ALPS GlidePad/Stickpointer configuration tool\n");
printf("\n");
printf(" Copyright (C) 1997 C. Scott Ananian <cananian@alumni.princeton.edu>\n");
printf(" Copyright (C) 1998-2001 Bruce Kall <kall@compass.com>\n");
printf(" Last Modified (Version 3.1.3) by Bruce Kall, 2/22/2002\n");
printf("\n");
printf(" tpconfig comes with ABSOLUTELY NO WARRANTY. This is free software,\n");
printf(" and you are welcome to redistribute it under the terms of the GPL.\n");
printf("\n");
}
/* write a byte to the ps/2 port, handling ACK */
void
putbyte (int fd, byte b)
{
if (DEBUG_LEVEL > DEBUG_LOW)
fprintf (stderr, "putbyte: write %#02x\n", b);
ps2_write (fd, &b, 1);
getbyte_expected (fd, AUX_ACK, "putbyte");
}
/* read a byte from the ps/2 port */
byte
getbyte (int fd)
{
byte b;
ps2_read (fd, &b, 1);
if (DEBUG_LEVEL > DEBUG_LOW)
fprintf (stderr, "ps2_read_byte: read %#02x\n", b);
return b;
}
void
getbyte_expected (int fd, byte expected, const char * what)
{
byte b = getbyte (fd);
if (DEBUG_LEVEL && b != expected)
fprintf (stderr, "Read %#02x, expected %#02x in %s.\n", b, expected, what);
#if 0
/* Upstream recommends commenting this out for 2.6 kernels. */
if (!ignore_selected_assertions)
assert (b == expected);
#endif
}
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