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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2017 Urja Rannikko <urjaman@gmail.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "platform.h"
#include "custom_baud.h"
#if IS_LINUX
#include <sys/ioctl.h>
#include <fcntl.h>
#include <asm-generic/termbits.h>
#include <asm-generic/ioctls.h>
/*
* This include hell above is why this is in a separate source file. See eg.
* https://www.downtowndougbrown.com/2013/11/linux-custom-serial-baud-rates/
* https://stackoverflow.com/questions/12646324/how-to-set-a-custom-baud-rate-on-linux
* https://github.com/jbkim/Linux-custom-baud-rate
* for more info.
*/
int set_custom_baudrate(int fd, unsigned int baud)
{
struct termios2 tio;
if (ioctl(fd, TCGETS2, &tio)) {
return -1;
}
tio.c_cflag &= ~CBAUD;
tio.c_cflag |= BOTHER;
tio.c_ispeed = baud;
tio.c_ospeed = baud;
return ioctl(fd, TCSETS2, &tio);
}
int use_custom_baud(unsigned int baud, const struct baudentry *baudtable)
{
int i;
for (i = 0; baudtable[i].baud; i++) {
if (baudtable[i].baud == baud)
return 0;
if (baudtable[i].baud > baud)
return 1;
}
return 1;
}
#else
#include <errno.h>
/* Stub, should not get called. */
int set_custom_baudrate(int fd, unsigned int baud)
{
errno = ENOSYS; /* Hoping "Function not supported" will make you look here. */
return -1;
}
int use_custom_baud(unsigned int baud, const struct baudentry *baudtable)
{
return 0;
}
#endif
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