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custom_baud: move Linux specific code into own file

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Handle system specific code in an own file like i2c_helper_linux.c.
The build system decides when to build it.

Change-Id: I0744e769dcc6000483e7256105903a87e927ee77
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/57990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Thomas Heijligen
2021-09-27 15:12:26 +02:00
committed by Nico Huber
parent 5a8b0773dd
commit 29ff205e6f
4 changed files with 69 additions and 47 deletions
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47
custom_baud.c
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@ -14,52 +14,10 @@
* GNU General Public License for more details.
*/
#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>
#include "custom_baud.h"
/* Stub, should not get called. */
int set_custom_baudrate(int fd, unsigned int baud)
{
@ -71,4 +29,3 @@ int use_custom_baud(unsigned int baud, const struct baudentry *baudtable)
{
return 0;
}
#endif