Advantech Watchdog timer query.

Advantech Watchdog timer query.

[Ryan Clayburn]

Hi Everyone,

I work for a government agency so please forgive me for not having the
latest version of the kernel. My question concerns an Advantech card PCI
6870 Single Board Computer and its watchdog timer. I am running Redhat 9
linux 2.4.20-8 and it comes with module that supports the hardware
advantechwdt.o. I have been able install and communicate with the card.
Get and set the timeout or margin and get the support information of the
card. Everything seems to work except when i deliberately delay the ping
to the card to let it reboot the system as a watchdog should it does not
reboot. Is there something i am missing. Do i need a update to the
driver? I am attaching the code. It is fairly simple and a lot of it is
just reading and writing information read from the driver about the
card. I would appreciate any help.

Cheers

Ryan Clayburn

Can i please be CC'ed the answers/comments posted to the list in
response to my posting

************************************************************************
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/watchdog.h>
#include <time.h>
#include <sys/time.h>

int main(int argc, const char *argv[]) 
{
	int fd;
	struct watchdog_info *wdog_info;
	time_t timenow;
	char supportOptions[500];
	char dtime[50];
	int i, err;
	int timein, timeout;
	    
	fd = open("/dev/watchdog",O_WRONLY);
	
	if (fd==-1) 
	{
		perror("watchdog");
		return 1;
	}
	//printf("argc = %d\n", argc);
	err = ioctl(fd, WDIOC_GETSUPPORT, wdog_info);
	if (err < 0)
		printf("error is %d\n", err);
	if (wdog_info->options & WDIOF_KEEPALIVEPING)
		strcpy(supportOptions, "WDIOF_KEEPALIVEPING");
	if (wdog_info->options & WDIOF_MAGICCLOSE)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_MAGICCLOSE");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_MAGICCLOSE");
		}
	}
	if (wdog_info->options & WDIOF_SETTIMEOUT)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_SETTIMEOUT");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_SETTIMEOUT");
		}
	}
	if (wdog_info->options & WDIOF_POWEROVER)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_POWEROVER");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_POWEROVER");
		}
	}
	if (wdog_info->options & WDIOF_CARDRESET)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_CARDRESET");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_CARDRESET");
		}
	}
	if (wdog_info->options & WDIOF_POWERUNDER)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_POWERUNDER");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_POWERUNDER");
		}
	}
	if (wdog_info->options & WDIOF_EXTERN2)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_EXTERN2");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_EXTERN2");
		}
	}
	if (wdog_info->options & WDIOF_EXTERN1)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_EXTERN1");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_EXTERN1");
		}
	}
	if (wdog_info->options & WDIOF_FANFAULT)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_FANFAULT");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_FANFAULT");
		}
	}
	if (wdog_info->options & WDIOF_OVERHEAT)
	{
		if (strlen(supportOptions) == 0)
		{
			strcpy(supportOptions, "WDIOF_OVERHEAT");
		}
		else
		{
			strcat(supportOptions, " | WDIOF_OVERHEAT");
		}
	}
	
	printf("\nWATCHDOG TIMER DAEMON\n");
	printf("---------------------\n\n");
	printf("Wdioc Get Support Information\n");
	printf("-------------------------------------\n");
	printf("Options: %s\nFirmware Version: %d\n", supportOptions,
wdog_info->firmware_version);
	printf("Identity: ", wdog_info->identity);
	for (i = 0; i < 32; i++)
	{
		printf("%c", wdog_info->identity[i]);
	}
	printf("\n-------------------------------------\n\n");
	ioctl(fd, WDIOC_GETTIMEOUT, &timein);
	printf("The current timeout is %d seconds\n", timein);
	timeout = 30;
	ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
	printf("The timeout was set to %d seconds\n", timeout);
	time(&timenow);
	strcpy(dtime, ctime(&timenow));
	printf("%s", dtime);
	while(1)
	{
		//write(fd, "\0", 1);
		ioctl(fd, WDIOC_KEEPALIVE, 0);
		if (err < 0)
			printf("error is %d\n", err);
		sleep(timeout*2+10);
		time(&timenow);
		strcpy(dtime, ctime(&timenow));
		printf("%s", dtime);
	}
	close(fd);
	printf("bye bye...\n");
	return 0;
}

Re: Advantech Watchdog timer query.

[Alan Cox]

On Gwe, 2005-10-21 at 17:12 +0930, Ryan Clayburn wrote:
> card. Everything seems to work except when i deliberately delay the ping
> to the card to let it reboot the system as a watchdog should it does not
> reboot. Is there something i am missing. Do i need a update to the

It ought to just work. Do check the ioctl call returns when setting the
timeout do not report an error however.

Re: Advantech Watchdog timer query.

[P]

Ryan Clayburn wrote:
> Hi Everyone,
> 
> I work for a government agency so please forgive me for not having the
> latest version of the kernel. My question concerns an Advantech card PCI
> 6870 Single Board Computer and its watchdog timer. I am running Redhat 9
> linux 2.4.20-8 and it comes with module that supports the hardware
> advantechwdt.o. I have been able install and communicate with the card.
> Get and set the timeout or margin and get the support information of the
> card. Everything seems to work except when i deliberately delay the ping
> to the card to let it reboot the system as a watchdog should it does not
> reboot. Is there something i am missing. Do i need a update to the
> driver? I am attaching the code. It is fairly simple and a lot of it is
> just reading and writing information read from the driver about the
> card. I would appreciate any help.

Be careful that you're using the correct driver.
Certain newer advantech systems use the w83627hf
chip, which is not supported in 2.4 by default.
Backporting the driver from 2.6 should be trivial.

Pádraig.

Re: Advantech Watchdog timer query

[Ryan Clayburn]

>Hi Everyone,

>I work for a government agency so please forgive me for not having the
>latest version of the kernel. My question concerns an Advantech card
>PCI 6870 Single Board Computer and its watchdog timer. I am running
>Redhat 9 linux 2.4.20-8 and it comes with module that supports the
>hardware advantechwdt.o. I have been able install and communicate with
>the card.Get and set the timeout or margin and get the support
>information of the card. Everything seems to work except when i
>deliberately delay the ping to the card to let it reboot the system as
>a watchdog should it does not reboot. Is there something i am missing.
>Do i need a update to the driver? I am attaching the code. It is fairly
>simple and a lot of it is just reading and writing information read
>from the driver about the card. I would appreciate any help.

>>Be careful that you're using the correct driver.
>>Certain newer advantech systems use the w83627hf
>>chip, which is not supported in 2.4 by default.
>>Backporting the driver from 2.6 should be trivial.

>>Pádraig.

I have backported the driver as suggested from 2.6 to 2.4 but that
didn't help. I then got a fedora core 3 installation on a separate hard
drive with kernel 2.6.9-1.667. the one thing that i found that is
peculiar and looks like a bug is that the /usr/include/watchdog.h is not
the same as the watchdog.h in the src directory. In any case even after
copying the the header file across i was unable to get the watchdog to
reset the OS. Is there something i am not doing?

Cheers

Ryan

Re: Advantech Watchdog timer query

[Pádraig Brady]

Ryan Clayburn wrote:

>>Hi Everyone,
>
>
>>I work for a government agency so please forgive me for not having the
>>latest version of the kernel. My question concerns an Advantech card
>>PCI 6870 Single Board Computer and its watchdog timer. I am running
>>Redhat 9 linux 2.4.20-8 and it comes with module that supports the
>>hardware advantechwdt.o. I have been able install and communicate with
>>the card.Get and set the timeout or margin and get the support
>>information of the card. Everything seems to work except when i
>>deliberately delay the ping to the card to let it reboot the system as
>>a watchdog should it does not reboot. Is there something i am missing.
>>Do i need a update to the driver? I am attaching the code. It is fairly
>>simple and a lot of it is just reading and writing information read
>
>>from the driver about the card. I would appreciate any help.
>
>>>Be careful that you're using the correct driver.
>>>Certain newer advantech systems use the w83627hf
>>>chip, which is not supported in 2.4 by default.
>>>Backporting the driver from 2.6 should be trivial.
>
>
>>>Pádraig.
>
>
>I have backported the driver as suggested from 2.6 to 2.4 but that
>didn't help. I then got a fedora core 3 installation on a separate hard
>drive with kernel 2.6.9-1.667. the one thing that i found that is
>peculiar and looks like a bug is that the /usr/include/watchdog.h is not
>the same as the watchdog.h in the src directory. In any case even after
>copying the the header file across i was unable to get the watchdog to
>reset the OS. Is there something i am not doing?
>
Looking at the datasheet for this system,
gives the watchdog characteristics of
15sec - 127min timeout in steps of 30sec.
This is quite sophisticated and doesn't
match the original advantechwdt.c, w83627hf.c
or i810-tco.c. So you need to ask advantech
exactly what watchdog they're using on that system.

Pádraig.