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1599c5a9ec
Since this is the last patch on the topic, add an entry to the devel document. Change-Id: Ide53798eb18f180069fb15687569c94e6a45720c Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org> Reviewed-on: https://review.coreboot.org/c/flashrom/+/90017 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Peter Marheine <pmarheine@chromium.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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* SPDX-FileCopyrightText: 2017 Urja Rannikko <urjaman@gmail.com>
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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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