Re: [microblaze-uclinux] newbie question on xilinx_ll_temac.c u-boot driver

[L.Campora@xxxxxxxx]

Michal,

>> I got your 1.10 project as stored in petalogix
repo. u-boot works.
>> Then I migrated the project to 11.1: works.
>> Then I started to migrate deprecated IP's: hard temac stops working
>> and shows that strange behaviour after having changed IP from
1.01b to
>> 2.00a.
>
> First of all check that IP works under linux - petalinux-jtag-boot
> to run the linux kernel and test if IP works or not. This is easy
functional
> test that your hw is ok.

I think it won't work... By simply checking the source
code of the driver in the linux-microblaze-2.6 repo,
it states FDT compatibility with xps-ll-temac up to
1.01.b.
At least it requires me to completely rebuild linux
and add a compatibility rule to the source code.

> If not- check timing constrains.

I'll discuss this with my hw engineer.


> The second choice is to look at xilinx doc and see what the differences
are.

Lots of differences, but Xilinx states that they are
extensions, which should not be enabled by default
(vlan handling, L4 checksum offload, filtering etc...)
What you can see macroscopicaly is that the memory
map declared by 2.00a is 0x80000 wide, but EDK still
allocates a 64K space.
This makes me think that 2.00a maybe is not that stable...

Regards, and many thanks for your precious help.

Luigi

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Luigi Campora
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