Re: [microblaze-uclinux] NuHo S3_1500) Ethernet working at 10 Mbps w/ 50 MHz system clock. Can surf too.

[Steve Sanders <akasanders@xxxxxxxxx>]

Glad it worked out.  Sounds like it applied about as expected. 
Definitely consider my "patch" a "proof-of-concept" and not "the real
thing."

It'd be easy enough to add a config option such as
CONFIG_ENET_FORCE10MBPS.  Or even a command-line utility that would
invoke a (modified?) Ethernet driver and force a re-negotiation.  Or
maybe there already is such a utility that I'm just not aware of.

Steve

--- David Banas <dbanas@nuhorizons.com> wrote:

> Steve,
> 
> That worked! Thanks for the patch.
> 
> FYI to all monitoring this thread:
> 
> 1) Steve's patch didn't apply "nicely" to the current version of
> "adapter.c"; I had to apply it by hand.
> 
> 2) For my board (NuHo Spartan3-1500), I only used the first and last
> of the
> 4 hunks. More specifically, I did NOT have to force the PHY address;
> it was
> correctly detected as "0x01".
> 
> 3) The PHY on this board doesn't seem to work with a "cross-over"
> cable
> connected between itself and a PC, despite its claim of being
> polarity-agnostic. I've got a "standard" Ethernet cable connected
> between it
> and my PC now, and the link seems to be robust.
> 
> 4) "Surfing" is working!
> 
> David Banas
> Field Applications Engineer
> Nu Horizons Electronics Corp.
> 2070 Ringwood Avenue
> San Jose, CA 95131
> (408)434-0800 - office
> (415)846-5837 - cell
> http://www.nuhorizons.com
> 
> > -----Original Message-----
> > From: owner-microblaze-uclinux@itee.uq.edu.au
> [mailto:owner-microblaze-
> > uclinux@itee.uq.edu.au] On Behalf Of Steve Sanders
> > Sent: Thursday, March 31, 2005 8:14 PM
> > To: microblaze-uclinux@itee.uq.edu.au
> > Subject: RE: [microblaze-uclinux] Ethernet update for David Banas'
> > NuHorizons board project
> >
> > OK, the attachment _is_ actually attached this time....
> >
> > --- Steve Sanders <akasanders@yahoo.com> wrote:
> >
> > > Sure, see attached.
> > >
> > > It's truly hack, though, so standard disclaimers apply.
> > >
> > > You'll likely need to have a datasheet w/Ethernet PHY register
> > > descriptions handy, but they are standardized registers.  And I
> do
> > > use
> > > the Linux-approved #defines to identify the registers to
> read/write,
> > > so
> > > it shouldn't be too bad.
> > >
> > > MII_ADVERTISE: set bits 5, 6; clear 7, 8, 9.
> > > MII_BMSR: set 3, 12; clear 13, 14, 15
> > > MII_BMCR: set 9, 12
> > >
> > > Bascially tells the PHY that it is only capable of 10Mbps and
> then
> > > forces a re-negotation to occur.  I should probably wait for the
> > > negotation to complete before proceeding, but ... that would be a
> > > very
> > > un-hacky thing to do.
> > >
> > > Steve
> > >
> > > --- David Banas <dbanas@nuhorizons.com> wrote:
> > >
> > > > Steve,
> > > >
> > > > Could you post your hack, please?
> > > >
> > > > Thanks,
> > > >
> > > > David Banas
> > > > Field Applications Engineer
> > > > Nu Horizons Electronics Corp.
> > > > 2070 Ringwood Avenue
> > > > San Jose, CA 95131
> > > > (408)434-0800 - office
> > > > (415)846-5837 - cell
> > > > http://www.nuhorizons.com
> > > >
> > > > > -----Original Message-----
> > > > > From: owner-microblaze-uclinux@itee.uq.edu.au
> > > > [mailto:owner-microblaze-
> > > > > uclinux@itee.uq.edu.au] On Behalf Of Steve Sanders
> > > > > Sent: Thursday, March 24, 2005 9:25 AM
> > > > > To: microblaze-uclinux@itee.uq.edu.au
> > > > > Subject: Re: [microblaze-uclinux] Ethernet update for David
> > > Banas'
> > > > > NuHorizons board project
> > > > >
> > > > > FYI - I'm working on a board that's using a 44MHz system
> clock
> > > and
> > > > > Ethernet is working at 10Mbps.  To get it working ... I
> hacked up
> > > > the
> > > > > Ethernet driver to force 10Mbps-only mode and then triggered
> a
> > > > > re-negotiation with its link partner.  Worked OK after that.
> > > > >
> > > > > Also had some problems with it auto-detecting the PHY address
> > > > properly.
> > > > >   Sometimes would detect the PHY at 0x1, 0x2, or 0x3. 
> Hard-coded
> > > > the
> > > > > address with the appropriate value for my board (0x3)
> > > > >
> > > > > Steve
> > > > >
> >
> >
>
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