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Date: Fri, 6 Dec 2013 14:52:50 +0400
From: Antony Pavlov <antonynpavlov@gmail.com>
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Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org
Subject: Re: How to debug Ethernet connectivity
To: Atilla Filiz <atilla.filiz@gmail.com>
Cc: barebox@lists.infradead.org

On Fri, 6 Dec 2013 11:21:25 +0100
Atilla Filiz <atilla.filiz@gmail.com> wrote:

> Hello
> =

> I have been tasked to debug a port of Barebox to our custom board. It
> has one Ethernet interface. All network related(dhcp, ping ...) tasks
> fail with "Network is down" error, although the link lights on my
> switch are on. So I did this on 2013.06:
> =

> --- barebox-2013.06.0.orig/net/
> eth.c    2013-06-02 12:24:06.000000000 +0200
> +++ barebox-2013.06.0/net/eth.c    2013-12-03 16:52:40.428089000 +0100
> @@ -142,12 +142,16 @@
> =

>      if (force || is_timeout(last_link_check, 5 * SECOND) ||
>              !eth_current->phydev->link) {
>          ret =3D phy_update_status(eth_current->phydev);
>          if (ret)
>              return ret;
>          last_link_check =3D get_time_ns();
>      }
> =

> +    return 0;
>      return eth_current->phydev->link ? 0 : -ENETDOWN;
>  }
> =

> This bypasses link detection and assumes the link is always up. This
> way, I got dhcp, ping and tftp working.
> =

> How can I debug this further to hunt down the Ethernet problem?
> Something seems wrong with my PHY settings. This is an iMX27 based
> board. Which files/functions/structures do I need to check?

There is miitool command to view MII status / registers.

> --
> Atilla Filiz
> =

> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox


-- =

--=A0
Best regards,
=A0 Antony Pavlov

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