mirror of
https://github.com/xcat2/confluent.git
synced 2024-11-22 09:32:21 +00:00
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
#include <termios.h>
|
|
#include <sys/ioctl.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define COM1 0x3f8
|
|
#define COM2 0x2f8
|
|
#define COM3 0x3e8
|
|
#define COM4 0x2e8
|
|
|
|
#define SPEEDNOOP 0
|
|
#define SPEED9600 3
|
|
#define SPEED19200 4
|
|
#define SPEED57600 6
|
|
#define SPEED115200 7
|
|
|
|
int main(int argc, char* argv[]) {
|
|
struct termios tty;
|
|
int ttyf;
|
|
int spcr;
|
|
int currspeed;
|
|
speed_t cspeed;
|
|
char buff[128];
|
|
char* offset;
|
|
uint64_t address;
|
|
spcr = open("/sys/firmware/acpi/tables/SPCR", O_RDONLY);
|
|
if (spcr < 0) {
|
|
exit(0);
|
|
}
|
|
if (read(spcr, buff, 80) < 80) {
|
|
exit(0);
|
|
}
|
|
if (buff[8] != 2) exit(0); //revision 2
|
|
if (buff[36] != 0) exit(0); //16550 only
|
|
if (buff[40] != 1) exit(0); //IO only
|
|
address = *(uint64_t *)(buff + 44);
|
|
currspeed = buff[58];
|
|
offset = buff + 10;
|
|
if (address == COM1) {
|
|
strncpy(buff, "/dev/ttyS0", 128);
|
|
} else if (address == COM2) {
|
|
strncpy(buff, "/dev/ttyS1", 128);
|
|
} else if (address == COM3) {
|
|
strncpy(buff, "/dev/ttyS2", 128);
|
|
} else if (address == COM4) {
|
|
strncpy(buff, "/dev/ttyS3", 128);
|
|
} else {
|
|
exit(0);
|
|
}
|
|
if (currspeed == SPEED9600) {
|
|
cspeed = B9600;
|
|
strcpy(offset, ",9600");
|
|
} else if (currspeed == SPEED19200) {
|
|
cspeed = B19200;
|
|
strcpy(offset, ",19200");
|
|
} else if (currspeed == SPEED57600) {
|
|
cspeed = B57600;
|
|
strcpy(offset, ",57600");
|
|
} else if (currspeed == SPEED115200) {
|
|
cspeed = B115200;
|
|
strcpy(offset, ",115200");
|
|
} else {
|
|
exit(0);
|
|
}
|
|
printf("%s\n", buff);
|
|
ttyf = open(buff, O_RDWR | O_NOCTTY);
|
|
tcgetattr(ttyf, &tty);
|
|
if (cspeed) {
|
|
cfsetospeed(&tty, B115200);
|
|
cfsetispeed(&tty, B115200);
|
|
}
|
|
tcsetattr(ttyf, TCSANOW, &tty);
|
|
ioctl(ttyf, TIOCCONS, 0);
|
|
|
|
}
|
|
|