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PowerPC Ethernet issue
- From: Robert Morse <rmorse at weldtechcorp dot com>
- To: ecos-devel at ecos dot sourceware dot org
- Date: Fri, 05 Jun 2009 11:29:47 -0400
- Subject: PowerPC Ethernet issue
We are working on a PowerPC ppc405 (AMCC 405ep) based board. We are
using the following drivers from ECOS v2.
A slight change to the hal/powerpc/.. directory to support our devices.
A change to devs/eth/powerpc/ppc405 directory to support dual ethernet.
Then a new devs/eth/phy to support the national DP8348C part.
Looking at the data sheet for the 405EP processor, the MAC has a bit
that tells the ethernet channel if it is FULL or HALF duplex mode. And
on initialization or any time a Ethernet Reset is required we do set it
to the correct Duplex. My current issue is what happens if someone
unplugs changes the duplex and plugs back in. I see nothing that will
update the duplex.
Looking at the situation, it seems like I would need to
enable/configure the interrupts for the PHYs. and when a change of
duplex is detected cause a reset of the MAC. Has anyone done anything
like this before. Looking through the ethernet drivers and phy drivers
I do not see anyone doing this (I admit not all).
Does my idea seem sound, or am I off in the woods somewhere. I know
about this duplex issue from another design. Where we had a commercial
rtos, that I found out they did not do this and caused a lot of issues,
I thought the device driver should of handled it, but they said it was
up to the application to control the bit. So I do want to repeat the