Support for Adder875 in Linux 2.4

Markus Westergren markus.westergren at
Tue Feb 15 06:44:28 EST 2005

On Mon, 14 Feb 2005, Yuli Barcohen wrote:

> >>>>> Markus Westergren writes:
>     Markus> Hi, I'm working on a project which will use hardware based
>     Markus> on Analogue & Micro Adder875 module together with Linux 2.4.
>     Markus> I use RedBoot as bootloader and kernel 2.4.27-pre1, both
>     Markus> came with the Adder module.
>     Markus> The project require:
>     Markus> - dual ethernet support with AM79C874 PHY
>     Markus>    The driver I've found (fec.c) only supports one
>     Markus>    ethernet. I'v started
>     Markus> 	modifying a newer version of this driver which have
>     Markus> 	support for my PHY. I have made some progress but it's
>     Markus> 	not working yet. Found out that the first FEC is used to
>     Markus> 	communicate with both PHY's. Both devices are detected
>     Markus> 	correctly and the first seems to work but the second
>     Markus> 	hangs the kernel when the first packet is sent or
>     Markus> 	received.
>     Markus> - SPI support
>     Markus>    Have found a simple driver (cpm_spi.c), which I have not
>     Markus>    tested yet.
>     Markus> - PCMCIA support
>     Markus>    Will try to modify the m8xx_pcmcia driver.
>     Markus> Not required but would be good to have:
>     Markus> - USB host support
>     Markus>    Have no clue where to start looking.
>     Markus> Have anyone used this module together with Linux and are
>     Markus> there working drivers for it? Any tips/ideas?
> Arabella Linux supports all these. Not sure how you are going to use
> PCMCIA on this specific board - it's not connected.
The board in my project is almost like a Adder875 but unlike the Adder it has a
PCMCIA slot connected.

I have tested a version of Arabella (FREE v2.1, kernel 2.4.25). It looks like
that the fec driver only supports general PHY and no link interrupts.


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