booting Linux on est8260 using FCC2

booting Linux on est8260 using FCC2

[Jim Mesenbrink]

I have an EST SBC8260 board that I am trying to boot Linux using the
FCC2 interface.  I am using ppcboot 1.2.0 and Linux 2.4.20-pre10.  I get
as far in the boot process as:

    IP-Config: Complete:
          device=eth0, addr=10.0.0.8, mask=255.255.255.0, gw=10.0.0.1,
         host=est8260, domain=, nis-domain=(none),
         bootserver=10.0.0.62, rootserver=10.0.0.62, rootpath=
    NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
    Looking up port of RPC 100003/2 on 10.0.0.62

After which the board goes silent.  I've placed a sniffer on the same
net to verify that the board stops talking.  If I use the slower SCC
ethernet interface everything works fine.  I have tried setting the port
to half duplex on my switch without any luck.  I looked at the clock
settings etc. in fcc_enet.c after reading a reply posted by Allen Curtis
in regards to this exact situation, "Booting Linux Kernel on a EST8260",
posted by another user.  I quickly realized I wasn't sure what I should
exactly be looking for.  This issue also appears in the posting
"root=/dev/nfs on sbc8260".  Any ideas would be greatly appreciated.


--
Jim Mesenbrink					 FlightSafety International
mesenb@vss.fsi.com				 Visual Simulation Systems
Phone: 314-551-8422				 5695 Campus Parkway
FAX:   314-551-8444				 St. Louis, MO 63042-2338


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RE: booting Linux on est8260 using FCC2

[acurtis]

> I have an EST SBC8260 board that I am trying to boot Linux using the
> FCC2 interface.  I am using ppcboot 1.2.0 and Linux 2.4.20-pre10.  I get
> as far in the boot process as:
>
>     IP-Config: Complete:
>           device=eth0, addr=10.0.0.8, mask=255.255.255.0, gw=10.0.0.1,
>          host=est8260, domain=, nis-domain=(none),
>          bootserver=10.0.0.62, rootserver=10.0.0.62, rootpath=
>     NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
>     Looking up port of RPC 100003/2 on 10.0.0.62
>
> After which the board goes silent.  I've placed a sniffer on the same
> net to verify that the board stops talking.  If I use the slower SCC
> ethernet interface everything works fine.  I have tried setting the port
> to half duplex on my switch without any luck.  I looked at the clock
> settings etc. in fcc_enet.c after reading a reply posted by Allen Curtis
> in regards to this exact situation, "Booting Linux Kernel on a EST8260",
> posted by another user.  I quickly realized I wasn't sure what I should
> exactly be looking for.  This issue also appears in the posting
> "root=/dev/nfs on sbc8260".  Any ideas would be greatly appreciated.

What FCC interfaces do you have configured into the kernel? Wouldn't FCC2 =
eth1?


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Re: booting Linux on est8260 using FCC2

[Allen Curtis]

> CONFIG_FEC_ENET is correct.  I do not have any history with this problem
> but a co-worker of mine does.  Back in the early Linux 2.4 days he was
> experiencing the same type of problem.  He remembers that he received
> some code from outside the source tree which solved the problem.  That
> was about a year ago.  Windriver was chosen as the operating system and
> the Linux code has long been deleted.  Nothing seems to jog his memory
> when he looks at the 2.4.20 source.  Of course early 2.4 to 2.4.20 is a
> lifetime ago.  I don't think I am doing anything out of the norm.  I use
> the arch/ppc/configs/est8260_defconfig for my starting point and then I
> disable CONFIG_SCC_ENET and enable CONFIG_FEC_ENET.

1. Did this work until you wanted to bootp?
2. Did you confirm that 8260_io/fcc_enet.c is configured with the same RX/TX
clocks as your hardware? (I had to change this and submitted patches to make this
a configuration option. Never made it into the tree.)
3. If you are not using MII to sense the speed, the driver initializes to
half-duplex. Look at this driver initilization if this is a potential problem.

Hope this helps.

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