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WSJT-X/ptt_unix.c

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/*
* WSJT is Copyright (c) 2001-2006 by Joseph H. Taylor, Jr., K1JT,
* and is licensed under the GNU General Public License (GPL).
*
* Code used from cwdaemon for parallel port ptt only.
*
* cwdaemon - morse sounding daemon for the parallel or serial port
* Copyright (C) 2002 -2005 Joop Stakenborg <pg4i@amsat.org>
* and many authors, see the AUTHORS file.
*
* 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 Library 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.
*/
# if HAVE_STDIO_H
# include <stdio.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# if HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#if HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_LINUX_PPDEV_H
# include <linux/ppdev.h>
# include <linux/parport.h>
#endif
#ifdef HAVE_DEV_PPBUS_PPI_H
# include <dev/ppbus/ppi.h>
# include <dev/ppbus/ppbconf.h>
#endif
int lp_reset (int fd);
int lp_ptt (int fd, int onoff);
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if (defined(__unix__) || defined(unix)) && !defined(USG)
# include <sys/param.h>
#endif
#ifndef BSD /* #ifdef LINUX ? */
#include <sys/io.h>
#endif
#include <string.h>
/* parport functions */
int dev_is_parport(const char *fname);
int ptt_parallel(int fd, int *ntx, int *iptt);
int ptt_serial(int fd, int *ntx, int *iptt);
int fd=-1; /* Used for both serial and parallel */
char nm[MAXPATHLEN];
/*
* ptt_
*
* generic unix PTT routine called from Fortran
*
* Inputs
* unused Unused, to satisfy old windows calling convention
* ptt_port device name serial or parallel
* ntx pointer to fortran command on or off
* iptt pointer to fortran command status on or off
* Returns - non 0 if error
*/
/* Tiny state machine */
#define STATE_PORT_CLOSED 0
#define STATE_PORT_OPEN_PARALLEL 1
#define STATE_PORT_OPEN_SERIAL 2
int
ptt_(int unused, char *ptt_port, int *ntx, int *iptt)
{
static int state=0;
char *p;
switch (state) {
case STATE_PORT_CLOSED:
if ((p = strchr(ptt_port, ' ')) != NULL)
*p = '\0';
if (p == NULL || *p == '\0') {
*iptt = *ntx;
return(0);
}
if ((fd = dev_is_parport(ptt_port)) > 0) {
state = STATE_PORT_OPEN_PARALLEL;
lp_reset(fd);
} else {
if ((fd = open(nm, O_RDWR | O_NDELAY)) < 0) {
fprintf(stderr, "Can't open %s.\n", nm);
return(1);
}
else
state = STATE_PORT_OPEN_SERIAL;
}
break;
case STATE_PORT_OPEN_PARALLEL:
ptt_parallel(fd, ntx, iptt);
break;
case STATE_PORT_OPEN_SERIAL:
ptt_serial(fd, ntx, iptt);
break;
default:
close(fd);
fd = -1;
state = STATE_PORT_CLOSED;
break;
}
return(0);
}
/*
* ptt_serial
*
* generic serial unix PTT routine called indirectly from Fortran
*
* fd - already opened file descriptor
* ntx - pointer to fortran command on or off
* iptt - pointer to fortran command status on or off
*/
int
ptt_serial(int fd, int *ntx, int *iptt)
{
int control = TIOCM_RTS | TIOCM_DTR;
if(*ntx) {
ioctl(fd, TIOCMBIS, &control); /* Set DTR and RTS */
*iptt = 1;
} else {
ioctl(fd, TIOCMBIC, &control);
*iptt = 0;
}
return(0);
}
/* parport functions */
/*
* dev_is_parport(name): check to see whether 'name' is a parallel
* port type character device. Returns non-zero if the device is
* capable of use for a parallel port based keyer, and zero if it
* is not. Unfortunately, this is platform specific.
*/
#if defined(HAVE_LINUX_PPDEV_H) /* Linux (ppdev) */
int
dev_is_parport(const char *fname)
{
struct stat st;
int fd;
int m;
snprintf(nm, sizeof(nm), "/dev/%s", fname);
if ((fd = open(nm, O_RDWR | O_NONBLOCK)) == -1)
return(-1);
if (fstat(fd, &st) == -1)
goto out;
if ((st.st_mode & S_IFMT) != S_IFCHR)
goto out;
if (ioctl(fd, PPGETMODE, &m) == -1)
goto out;
return(fd);
out:
close(fd);
return(-1);
}
#elif defined(HAVE_DEV_PPBUS_PPI_H) /* FreeBSD (ppbus/ppi) */
int
dev_is_parport(const char *fname)
{
struct stat st;
unsigned char c;
int fd;
char *p;
if ((p = strchr(fname, '/')) != NULL) /* Look for /dev */
snprintf(nm, sizeof(nm), "%s", fname);
else
snprintf(nm, sizeof(nm), "/dev/%s", fname);
if ((fd = open(nm, O_RDWR | O_NONBLOCK)) == -1)
return(-1);
if (fstat(fd, &st) == -1)
goto out;
if ((st.st_mode & S_IFMT) != S_IFCHR)
goto out;
if (ioctl(fd, PPISSTATUS, &c) == -1)
goto out;
return(fd);
out:
close(fd);
return(-1);
}
#else /* Fallback (nothing) */
int
dev_is_parport(const char *fname)
{
return(-1);
}
#endif
/* Linux wrapper around PPFCONTROL */
#ifdef HAVE_LINUX_PPDEV_H
static void
parport_control (int fd, unsigned char controlbits, int values)
{
struct ppdev_frob_struct frob;
frob.mask = controlbits;
frob.val = values;
if (ioctl (fd, PPFCONTROL, &frob) == -1)
{
fprintf(stderr, "Parallel port PPFCONTROL");
exit (1);
}
}
#endif
/* FreeBSD wrapper around PPISCTRL */
#ifdef HAVE_DEV_PPBUS_PPI_H
static void
parport_control (int fd, unsigned char controlbits, int values)
{
unsigned char val;
if (ioctl (fd, PPIGCTRL, &val) == -1)
{
fprintf(stderr, "Parallel port PPIGCTRL");
exit (1);
}
val &= ~controlbits;
val |= values;
if (ioctl (fd, PPISCTRL, &val) == -1)
{
fprintf(stderr, "Parallel port PPISCTRL");
exit (1);
}
}
#endif
/* open port and setup ppdev */
int
lp_init (int fd)
{
#ifdef HAVE_LINUX_PPDEV_H
int mode;
#endif
#ifdef HAVE_LINUX_PPDEV_H
mode = PARPORT_MODE_PCSPP;
if (ioctl (fd, PPSETMODE, &mode) == -1)
{
fprintf(stderr, "Setting parallel port mode");
close (fd);
return(-1);
}
if (ioctl (fd, PPEXCL, NULL) == -1)
{
fprintf(stderr, "Parallel port is already in use.\n");
close (fd);
return(-1);
}
if (ioctl (fd, PPCLAIM, NULL) == -1)
{
fprintf(stderr, "Claiming parallel port.\n");
fprintf(stderr, "HINT: did you unload the lp kernel module?");
close (fd);
return(-1);
}
/* Enable CW & PTT - /STROBE bit (pin 1) */
parport_control (fd, PARPORT_CONTROL_STROBE, PARPORT_CONTROL_STROBE);
#endif
#ifdef HAVE_DEV_PPBUS_PPI_H
parport_control (fd, STROBE, STROBE);
#endif
lp_reset (fd);
return(0);
}
/* release ppdev and close port */
int
lp_free (int fd)
{
#ifdef HAVE_LINUX_PPDEV_H
lp_reset (fd);
/* Disable CW & PTT - /STROBE bit (pin 1) */
parport_control (fd, PARPORT_CONTROL_STROBE, 0);
ioctl (fd, PPRELEASE);
#endif
#ifdef HAVE_DEV_PPBUS_PPI_H
/* Disable CW & PTT - /STROBE bit (pin 1) */
parport_control (fd, STROBE, 0);
#endif
close (fd);
return(0);
}
/* set to a known state */
int
lp_reset (int fd)
{
#if defined (HAVE_LINUX_PPDEV_H) || defined (HAVE_DEV_PPBUS_PPI_H)
lp_ptt (fd, 0);
#endif
return(0);
}
/* SSB PTT keying - /INIT bit (pin 16) (inverted) */
int
lp_ptt (int fd, int onoff)
{
#ifdef HAVE_LINUX_PPDEV_H
if (onoff == 1)
parport_control (fd, PARPORT_CONTROL_INIT,
PARPORT_CONTROL_INIT);
else
parport_control (fd, PARPORT_CONTROL_INIT, 0);
#endif
#ifdef HAVE_DEV_PPBUS_PPI_H
if (onoff == 1)
parport_control (fd, nINIT,
nINIT);
else
parport_control (fd, nINIT, 0);
#endif
return(0);
}
/*
* ptt_parallel
*
* generic parallel unix PTT routine called indirectly from Fortran
*
* fd - already opened file descriptor
* ntx - pointer to fortran command on or off
* iptt - pointer to fortran command status on or off
*/
int
ptt_parallel(int fd, int *ntx, int *iptt)
{
if(*ntx) {
lp_ptt(fd, 1);
*iptt=1;
} else {
lp_ptt(fd, 0);
*iptt=0;
}
return(0);
}
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