boards: phytec-som-am335x: ethernet broken after reset

boards: phytec-som-am335x: ethernet broken after reset

[Michael Grzeschik]

Hi Teresa,

With the current code for the phytec-som-am335x, the ethernet works only
after the first powerup. If you soft reset the module the network won't
work anymore.

...
cpsw 4a100000.ethernet: detected phy mask 0x6
mdio_bus: miibus0: probed
cpsw 4a100000.ethernet: Failed to setup slave 0: I/O error
...

That happens in the second boot. The phy is probably in a wrong state and
won't communicate over MDIO.

Do you have any ideas?

Thanks,
Michael

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: boards: phytec-som-am335x: ethernet broken after reset

[Teresa Remmet]

Hello Michael,

can you give me a little bit more information about the hardware you
are using? As the phytec-som-am335x, includes 3 different modules.
Names of the images in use and hardware revision of the som whould be
great.

I have made a quick test it with a phycore som on master. It worked for
me.

Regards,
Teresa

Am Mittwoch, den 23.09.2015, 17:28 +0200 schrieb Michael Grzeschik:
> Hi Teresa,
> 
> With the current code for the phytec-som-am335x, the ethernet works only
> after the first powerup. If you soft reset the module the network won't
> work anymore.
> 
> ...
> cpsw 4a100000.ethernet: detected phy mask 0x6
> mdio_bus: miibus0: probed
> cpsw 4a100000.ethernet: Failed to setup slave 0: I/O error
> ...
> 
> That happens in the second boot. The phy is probably in a wrong state and
> won't communicate over MDIO.
> 
> Do you have any ideas?
> 
> Thanks,
> Michael
> 



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Re: boards: phytec-som-am335x: ethernet broken after reset

[Michael Grzeschik]

On Thu, Sep 24, 2015 at 08:37:31AM +0200, Teresa Remmet wrote:
> can you give me a little bit more information about the hardware you
> are using? As the phytec-som-am335x, includes 3 different modules.
> Names of the images in use and hardware revision of the som whould be
> great.

It is an 1358.3 som which uses the MT41K128M16JT memory instead of the
MT41J128M16125IT. I created an extra image, as it is used with an custom
baseboard.

> I have made a quick test it with a phycore som on master. It worked for
> me.

Ok, Than there must be some differences. Possibly another used phy on
the 1358.3 module.

Thanks,
Michael

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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Re: boards: phytec-som-am335x: ethernet broken after reset

[Teresa Remmet]

Hello Michael,

Am Dienstag, den 29.09.2015, 16:12 +0200 schrieb Michael Grzeschik:
> On Thu, Sep 24, 2015 at 08:37:31AM +0200, Teresa Remmet wrote:
> > can you give me a little bit more information about the hardware you
> > are using? As the phytec-som-am335x, includes 3 different modules.
> > Names of the images in use and hardware revision of the som whould be
> > great.
> 
> It is an 1358.3 som which uses the MT41K128M16JT memory instead of the
> MT41J128M16125IT. I created an extra image, as it is used with an custom
> baseboard.

The MT41K128M16JT is a newer RAM. We tested that this also runs with the
timings of MT41J128M16125IT. Maybe I should add a comment into the code
as this leads to confusion.

> 
> > I have made a quick test it with a phycore som on master. It worked for
> > me.
> 
> Ok, Than there must be some differences. Possibly another used phy on
> the 1358.3 module.

I have checked this now also on a 1358.3 with MT41K128M16JT and a SMSC
LAN 8710A phy. It works with barebox master.

Regards,
Teresa

> 
> Thanks,
> Michael
> 



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