bc35c17446
+ ECP parallel port chipset FIFO detection + DMA+FIFO parallel I/O handled as chipset specific + nlpt updated in order to use the above enhanced parallel I/O. Use 'lptcontrol -e' to use enhanced I/O + Various options documented in LINT + Full IEEE1284 NIBBLE and BYTE modes support. See ppbus(4) for an overview of the IEEE1284 standard + Detection of PnP parallel devices at boot + Read capability added to nlpt driver to get IEEE1284 compliant printer status with a simple 'cat /dev/lpt0' + IEEE1284 peripheral emulation added to BYTE mode. Two computers may dialog according to IEEE1284 signaling method. See PERIPH_1284 option and /sys/dev/ppbus/ppi.c All this code is supposed to provide basic functions for IEEE1284 programming. ppi.c and nlpt.c may act as examples.
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 1994 Geoffrey M. Rehmet
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Geoffrey M. Rehmet
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$Id: lptcontrol.c,v 1.6 1997/09/25 06:36:29 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <limits.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <machine/lpt.h>
|
|
#include <sys/file.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
|
|
|
|
#define PATH_LPCTL _PATH_DEV "lpctl"
|
|
#define DEFAULT_UNIT "0"
|
|
#define IRQ_INVALID -1
|
|
#define DO_POLL 0
|
|
#define USE_IRQ 1
|
|
#define USE_EXT_MODE 2
|
|
#define USE_STD_MODE 3
|
|
|
|
static void usage()
|
|
{
|
|
fprintf(stderr, "usage: lptcontrol -i | -p | -s | -e [-u <unit no.>]\n");
|
|
exit(1);
|
|
}
|
|
|
|
static void set_interrupt_status(int irq_status, const char * file)
|
|
{
|
|
int fd;
|
|
|
|
if((fd = open(file, O_WRONLY, 0660)) < 0)
|
|
err(1, "open");
|
|
if(ioctl(fd, LPT_IRQ, &irq_status) < 0)
|
|
err(1, "ioctl");
|
|
close(fd);
|
|
}
|
|
|
|
static char * dev_file(char unit_no)
|
|
{
|
|
static char devname[_POSIX_PATH_MAX+1];
|
|
int len;
|
|
|
|
strncpy(devname, PATH_LPCTL, _POSIX_PATH_MAX);
|
|
devname[len = strlen(devname)] = unit_no;
|
|
devname[++len] = '\0';
|
|
|
|
return(devname);
|
|
}
|
|
|
|
int main (int argc, char * argv[])
|
|
{
|
|
int opt;
|
|
int irq_status = IRQ_INVALID;
|
|
char * unit = DEFAULT_UNIT;
|
|
|
|
while((opt = getopt(argc, argv, "ipesu:")) != -1)
|
|
switch(opt) {
|
|
case 'i': irq_status = USE_IRQ; break;
|
|
case 'p': irq_status = DO_POLL; break;
|
|
case 'e': irq_status = USE_EXT_MODE; break;
|
|
case 's': irq_status = USE_STD_MODE; break;
|
|
case 'u': unit = optarg;
|
|
if(!isdigit(*unit))
|
|
usage();
|
|
break;
|
|
default : usage();
|
|
}
|
|
if(irq_status == IRQ_INVALID)
|
|
usage();
|
|
|
|
set_interrupt_status(irq_status, dev_file(*unit));
|
|
|
|
exit(0);
|
|
}
|