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/*
* This file is part of the libserialport project.
*
* Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 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 Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* At the time of writing, glibc does not support the Linux kernel interfaces
* for setting non-standard baud rates and flow control. We therefore have to
* prepare the correct ioctls ourselves, for which we need the declarations in
* linux/termios.h.
*
* We can't include linux/termios.h in serialport.c however, because its
* contents conflict with the termios.h provided by glibc. So this file exists
* to isolate the bits of code which use the kernel termios declarations.
*
* The details vary by architecture. Some architectures have c_ispeed/c_ospeed
* in struct termios, accessed with TCSETS/TCGETS. Others have these fields in
* struct termios2, accessed with TCSETS2/TCGETS2. Some architectures have the
* TCSETX/TCGETX ioctls used with struct termiox, others do not.
*/
#include <config.h>
#include <stdlib.h>
#include <linux/termios.h>
#include "linux_termios.h"
SP_PRIV unsigned long get_termios_get_ioctl(void)
{
#ifdef HAVE_STRUCT_TERMIOS2
return TCGETS2;
#else
return TCGETS;
#endif
}
SP_PRIV unsigned long get_termios_set_ioctl(void)
{
#ifdef HAVE_STRUCT_TERMIOS2
return TCSETS2;
#else
return TCSETS;
#endif
}
SP_PRIV size_t get_termios_size(void)
{
#ifdef HAVE_STRUCT_TERMIOS2
return sizeof(struct termios2);
#else
return sizeof(struct termios);
#endif
}
#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && HAVE_DECL_BOTHER
SP_PRIV int get_termios_speed(void *data)
{
#ifdef HAVE_STRUCT_TERMIOS2
struct termios2 *term = (struct termios2 *) data;
#else
struct termios *term = (struct termios *) data;
#endif
if (term->c_ispeed != term->c_ospeed)
return -1;
else
return term->c_ispeed;
}
SP_PRIV void set_termios_speed(void *data, int speed)
{
#ifdef HAVE_STRUCT_TERMIOS2
struct termios2 *term = (struct termios2 *) data;
#else
struct termios *term = (struct termios *) data;
#endif
term->c_cflag &= ~CBAUD;
term->c_cflag |= BOTHER;
term->c_ispeed = term->c_ospeed = speed;
}
#endif
#ifdef HAVE_STRUCT_TERMIOX
SP_PRIV size_t get_termiox_size(void)
{
return sizeof(struct termiox);
}
SP_PRIV int get_termiox_flow(void *data, int *rts, int *cts, int *dtr, int *dsr)
{
struct termiox *termx = (struct termiox *) data;
int flags = 0;
*rts = (termx->x_cflag & RTSXOFF);
*cts = (termx->x_cflag & CTSXON);
*dtr = (termx->x_cflag & DTRXOFF);
*dsr = (termx->x_cflag & DSRXON);
return flags;
}
SP_PRIV void set_termiox_flow(void *data, int rts, int cts, int dtr, int dsr)
{
struct termiox *termx = (struct termiox *) data;
termx->x_cflag &= ~(RTSXOFF | CTSXON | DTRXOFF | DSRXON);
if (rts)
termx->x_cflag |= RTSXOFF;
if (cts)
termx->x_cflag |= CTSXON;
if (dtr)
termx->x_cflag |= DTRXOFF;
if (dsr)
termx->x_cflag |= DSRXON;
}
#endif
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