[U-Boot] Ethernet PHY LAN8700

[rk1825]

I understand that if it is data sync problem then it should wait/hang at that
place,
But it is getting reset. When i probed reset status it says Check stop reset
has happened.

We are using custom board based on MPC8313 processor, phy used in our board
is LAN8700 and  U-boot version used is 1.3.0.

-Thanks
Rupesh


Jerry Van Baren-7 wrote:
> 
> Please don't top quote.
> 
> rudresh wrote:
>> HI gvb
>> 
>> I was trying to print the status of phy registers by putting some debug
>> statements in adjust_link function of tsec.c (drivers/tsec.c).
>> 
>> I found that after putting these debugs, i could not recreate the problem
>> and ethernet works fine.
>> 
>> does this mean there is DDR2 initialization problem in my code..?
> 
> No, "fixing" the problem by putting in debug statements sounds more like 
> data cache (less likely) or bus interface unit (missing sync) issues 
> where your processor is holding on to the data rather than writing it 
> out when you think you wrote it out or reordering reads and writes 
> (missing sync/eieio issue).  This would get into the "data accessor" 
> (read/write with sync calls) functions and proper use thereof.
> 
> Having said that, I am puzzled how sync/timing issues would result in 
> your board spontaneously resetting - that is usually a memory corruption 
> problem.  Adding print statements generally doesn't "solve" memory 
> corruption problems (sometimes it seems to due to changes in stack usage 
> if you have something set up wrong, but I cannot even speculate on 
> how/why/what could be set up wrong from the far end of a mail list).
> 
> You didn't say what version of u-boot you are basing your code off of 
> nor what processor you are using.  I don't have expertise w/ the tsec or 
> your PHY, perhaps if you are more specific someone with real experience 
> with the tsec, etc. can give more advice.
> 
> gvb
> 
>> Jerry Van Baren-7 wrote:
>>> rudresh wrote:
>>>> Hi,
>>>>
>>>> In Ethernet PHY LAN8700 driver having some issues, during tftp the
>>>> large
>>>> file of more than 2MB of the binary file , some time its hangup  &
>>>> sometime
>>>> its reset the board. same driver is working in evaluation board  with
>>>> same
>>>> PHY & interface . if i tried in customize board the problem is
>>>> occurring
>>>> every 2- 3 of iteration. how to fix this issue..
>>>>
>>>> Thanks
>>>> Rudresh
>>> Hi Rudresh,
>>>
>>> If your ethernet driver uses DMA, it is probably due to a SDRAM 
>>> (DDR/DDR2/DDR3) configuration issue (fixable) or a board layout issue 
>>> (expensive to fix).
>>>
>>> <http://www.denx.de/wiki/view/DULG/UBootCrashAfterRelocation>
>>> <http://www.denx.de/wiki/DULG/SDRAM>
>>>
>>> gvb
> 
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