[U-Boot-Users] Gigabit Ethernet?

[Carl Riechers]

Travis:

The Marvell 88E1111 PHYs work at 100M without changing
the miiphy_speed function.  Of course the extended
registers are different and a wack of register 0x14 is
needed for the correct RGMII settings for the 440GX. 
I used the mii command for the wack and have not
changed u-boot.  I did not persue 1000M because my
TFTP server runs at 100M.

The Marvell PHYs must have the correct hard reset
waveform to function correctly.  You may want to check
the hardware reset waveform for the CIS8201 PHY and
then check the IEEE register status for proper
indications.

Carl

--- Travis Sawyer <tsawyer+u-boot at sandburst.com>
wrote:
> On Thu, 2004-03-11 at 11:02, Wolfgang Denk wrote:
> > In message
> <1079020123.17587.135.camel at pavement.sandburst.com>
> you wrote:
> > > 
> > > Is anyone working on Gigabit Ethernet PHY
> support for u-boot?
> > 
> > What _exactly_ are you looking for?
> > 
> The IBM 440GX supports GbE on the 2nd and 3rd ports,
> if a gigabit
> capable phy is in place that is.
> 
> The current miiphy_utils (specifically miiphy_speed
> and miiphy_duplex)
> read the phy autonegiotation link partner ability
> register (reg 0x05) to
> determine current link speed and duplex.
> 
> Register 5 is a standard IEEE802.3 register. 
> However, in order to get
> 'true' status (10/100/1000), extended registers are
> needed.
> 
> In the case of the ocotea board, IBM placed a
> LXT9762 (6 port phy) for
> emac 0 and 1 (as they only support 10/100), and two
> (2) cicada CIS8201
> phys for emac 2 and 3 (supports 10/100/1000).
> 
> The problem I see is that the extended register set
> may not be the same
> across the phy part spectrum.  So, one would need to
> check the OUI and
> then go to the appropriate register for that part. 
> Which, IMHO, would
> add quite a bit of code.
> 
> Perhaps for my application I should force 1000 Gbps
> off in the
> autonegotiation register...
> 
> -travis
> 
> 
> 
> 
>
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