mirror of
https://review.coreboot.org/flashrom.git
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cd84b8de76
Call the function before tcsetattr() settings are known, then again with settings prepared but not yet applied and finally a third time after tcsetattr(). Darwin support needs this change; there custom_baud code must be called to modify the settings passed to tcsetattr() and then again after tcsetattr() returns. The change should be non-functional on all currently supported systems; current code calls set_custom_baudrate() before any tcsetattr() settings are prepared, so we have three stages in total. This change originates from discussion of the macOS patch proposed by Denis Ahrens in https://review.coreboot.org/c/flashrom/+/67822 Change-Id: I40cc443cfb7bf6b212b31826d437b898cc13c427 Signed-off-by: Peter Stuge <peter@stuge.se> Reviewed-on: https://review.coreboot.org/c/flashrom/+/70569 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Thomas Heijligen <src@posteo.de>
61 lines
1.6 KiB
C
61 lines
1.6 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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#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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#include "custom_baud.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, const enum custom_baud_stage stage, void *tio_wanted)
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{
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struct termios2 tio;
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if (stage != BEFORE_FLAGS)
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return 0;
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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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