[U-Boot-Users] Possible TSEC Ethernet driver patch

David Saada
2008-01-08T16:48:07Z

Michael,
This would certainly be useful. In fact I thought of doing so myself as it
bothered my as well...
Furthermore, I submitted a patch couple of days ago, which added (among the
rest) MII command support to the UEC driver (basically a copy from the TSEC
code). I guess this kind of patch should go there too.
If you plan to submit this patch please inform - otherwise I'll do it myself
(I think its quite a simple one).
Regards,
David.

michael.firth wrote:
>
> While debugging a board recently I found that the MDIO (mii) command
> support in the TSEC Ethernet driver is somewhat unhelpful.
>
> Currently, even though there is a comment in the code that "For now,
> only TSEC1 (index 0) has access to the PHYs, so all of the entries have
> '0'", all MDIO commands are processed by searching for a TSEC instance
> that has the requested MDIO address associated with it, and then using
> that instance to run the command, even though, because of the
> aforementioned comment, all instances process MDIO commands through the
> same port.
>
> This means that it is only possible to communicate with MDIO addresses
> that have a TSEC instance associated with them, even though the hardware
> is capable of accessing any address. It also means that there is a list
> search that isn't needed.
>
> I have patched the 1.3.1 U-Boot code to remove this search, and to
> interrogate the requested PHY directly. This means that it is possible
> to directly access all 32 PHY addresses.
>
> Is this a change that would be more generally useful to the U-Boot
> community, and, if so, how should I submit a more general patch for
> this?
>
> Michael
>
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