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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_SYS_STAT_H
# include <sys/stat.h>
#endif
#if (defined(__unix__) || defined(unix)) && !defined(USG)
# include <sys/param.h>
#endif
int fd; /* Used for both serial and parallel */
#ifdef USE_SERIAL
/* First cut, note that this only distinguishes Linux from BSDs,
* it will be done better later on using configure. N.B. that OSX
* will come up as BSD but I think this is also the right serial port
* for OSX. -db
*/
#if defined(BSD)
#define TTYNAME "/dev/cuad%d" /* Use non blocking form */
#else
#include <sys/io.h>
#define TTYNAME "/dev/ttyUSB%d"
#endif
/* Not quite right for size but '%d + 1' should be plenty enough -db */
/* As TTYNAME is a string, just at 20 chars do udevd is happier. */
/* E.g. USB serial ports appear as /dev/ttyUSB0 */
#define TTYNAME_SIZE sizeof(TTYNAME)+20
int
ptt_(int *nport, int *ntx, int *iptt)
{
/* Fixme, nport should be a sting and not a number */
static int nopen=0;
int control = TIOCM_RTS | TIOCM_DTR;
char s[TTYNAME_SIZE];
if(*nport < 0) {
*iptt=*ntx;
return(0);
}
if(*ntx && (!nopen)) {
snprintf(s, TTYNAME_SIZE, TTYNAME, (*nport) - 1); /* Comport 1 == dev 0 */
s[TTYNAME_SIZE] = '\0';
/* open the device */
printf("Opening %s\n", s);
if ((fd = open(s, O_RDWR | O_NDELAY)) < 0) {
fprintf(stderr, "Can't open %s.\n", s);
return(1);
}
nopen=1;
return(0);
}
if(*ntx && nopen) {
ioctl(fd, TIOCMBIS, &control); // Set DTR and RTS
*iptt=1;
}
else {
ioctl(fd, TIOCMBIC, &control);
close(fd);
*iptt=0;
nopen=0;
}
return(0);
}
#endif
#ifdef USE_PARALLEL
#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
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if (defined(__unix__) || defined(unix)) && !defined(USG)
# include <sys/param.h>
#endif
/* parport functions */
int lp_reset (int fd);
int lp_ptt (int fd, int onoff);
/*
* 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)
{
char nm[MAXPATHLEN];
struct stat st;
int fd, m;
m = snprintf(nm, sizeof(nm), "/dev/%s", fname);
if (m >= sizeof(nm))
return (-1);
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)
{
char nm[MAXPATHLEN];
struct stat st;
unsigned char c;
int fd, m;
m = snprintf(nm, sizeof(nm), "/dev/%s", fname);
if (m >= sizeof(nm))
return (-1);
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);
exit (1);
}
if (ioctl (fd, PPEXCL, NULL) == -1)
{
fprintf(stderr, "Parallel port %s is already in use", dev->desc);
close (fd);
exit (1);
}
if (ioctl (fd, PPCLAIM, NULL) == -1)
{
fprintf(stderr, "Claiming parallel port %s", dev->desc);
debug ("HINT: did you unload the lp kernel module?");
debug ("HINT: perhaps there is another cwdaemon running?");
close (fd);
exit (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;
}
/* XXX I am totally unsure of this, LPNAME should come from
* the WSJT.INI instead but for now this should work -- db
*/
#ifdef BSD
#define LPNAME "lpt%d"
#else
#define LPNAME "lp%d"
#endif
#define LPNAME_SIZE (sizeof(LPNAME))
int
ptt_(int *nport, int *ntx, int *iptt)
{
static int nopen=0;
int fd;
char s[LPNAME_SIZE];
if(*nport < 0) {
*iptt=*ntx;
return(0);
}
if(*ntx && (!nopen)) {
snprintf(s, LPNAME_SIZE, LPNAME, (*nport) - 1); /* Comport 1 == dev 0 */
s[LPNAME_SIZE] = '\0';
if ((fd = dev_is_parport(s)) < 0) {
fprintf(stderr, "Can't use %s.", s);
return(1);
}
if(*ntx && nopen) {
lp_ptt(fd, 1);
*iptt=1;
} else {
lp_ptt(fd, 0);
close(fd);
*iptt=0;
nopen=0;
}
}
return(0);
}
#endif
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