77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
|
#include <sys/io.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
bool lpt_enable=false; // control usage of LPT port to reset target devices
|
||
|
|
int lpt_port=0x378; // LPT port in hex(0x378 is usually LPT1)
|
||
|
|
|
||
|
|
/*
|
||
|
|
Function, that turn off all LPT port pins.
|
||
|
|
This is needed to unlock LPT control circuit, when
|
||
|
|
management computer is just booted
|
||
|
|
*/
|
||
|
|
void lpt_init()
|
||
|
|
{
|
||
|
|
if (lpt_enable)
|
||
|
|
{
|
||
|
|
if (ioperm (lpt_port, 3, 1))
|
||
|
|
{
|
||
|
|
log_event("Error: Unlocking the circuit fails due to LPT port access error");
|
||
|
|
// disable LPT port usage
|
||
|
|
lpt_enable=false;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// Unlock circuit
|
||
|
|
outb (0, lpt_port);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Function, that turn on first LPT port pin and turn off others.
|
||
|
|
This is needed to lock LPT control circuit, when
|
||
|
|
management computer is rebooted
|
||
|
|
*/
|
||
|
|
void lpt_lock_cond(bool ignore_options)
|
||
|
|
{
|
||
|
|
if (lpt_enable || ignore_options)
|
||
|
|
{
|
||
|
|
if (ioperm (lpt_port, 3, 1))
|
||
|
|
{
|
||
|
|
log_event("Error: Locking the circuit fails due to LPT port access error");
|
||
|
|
// disable LPT port usage
|
||
|
|
lpt_enable=false;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// Lock circuit
|
||
|
|
outb (1, lpt_port);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Function, that turn on only one LPT port pin, defined by it argument, wait a second,
|
||
|
|
and turn off all pins. That is enough to reset specified host.
|
||
|
|
*/
|
||
|
|
void reset_pin(int pin_num)
|
||
|
|
{
|
||
|
|
if (lpt_enable)
|
||
|
|
{
|
||
|
|
if (pin_num==0)
|
||
|
|
return; // there is no LPT control for target host
|
||
|
|
if (pin_num<2 || pin_num>8)
|
||
|
|
{
|
||
|
|
log_event("Error: incorrent LPT pin number");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
int pins = 1<<(pin_num-1);
|
||
|
|
if (ioperm (lpt_port, 3, 1))
|
||
|
|
{
|
||
|
|
log_event("Error: LPT port access error");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// Reset host
|
||
|
|
outb (pins, lpt_port);
|
||
|
|
sleep(1);
|
||
|
|
outb (0, lpt_port);
|
||
|
|
}
|
||
|
|
}
|