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615ba1849c
The function to do this is contained in custom_baud.c because of broken include stuff. Change-Id: I2a20f9182cb85e7bce5d6654a2caf20e6202b195 Signed-off-by: Urja Rannikko <urjaman@gmail.com> Reviewed-on: https://review.coreboot.org/20224 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2017 Urja Rannikko <urjaman@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "platform.h"
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#include "custom_baud.h"
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#if IS_LINUX
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <asm-generic/termbits.h>
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#include <asm-generic/ioctls.h>
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/*
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* This include hell above is why this is in a separate source file. See eg.
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* https://www.downtowndougbrown.com/2013/11/linux-custom-serial-baud-rates/
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* https://stackoverflow.com/questions/12646324/how-to-set-a-custom-baud-rate-on-linux
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* https://github.com/jbkim/Linux-custom-baud-rate
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* for more info.
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*/
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int set_custom_baudrate(int fd, unsigned int baud)
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{
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struct termios2 tio;
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if (ioctl(fd, TCGETS2, &tio)) {
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return -1;
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}
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tio.c_cflag &= ~CBAUD;
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tio.c_cflag |= BOTHER;
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tio.c_ispeed = baud;
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tio.c_ospeed = baud;
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return ioctl(fd, TCSETS2, &tio);
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}
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int use_custom_baud(unsigned int baud, const struct baudentry *baudtable)
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{
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int i;
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for (i = 0; baudtable[i].baud; i++) {
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if (baudtable[i].baud == baud)
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return 0;
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if (baudtable[i].baud > baud)
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return 1;
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}
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return 1;
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}
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#else
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#include <errno.h>
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/* Stub, should not get called. */
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int set_custom_baudrate(int fd, unsigned int baud)
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{
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errno = ENOSYS; /* Hoping "Function not supported" will make you look here. */
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return -1;
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}
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int use_custom_baud(unsigned int baud, const struct baudentry *baudtable)
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{
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return 0;
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}
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#endif
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