[U-Boot] Can't connect to PHY, BCM5461

Simon Boman simon.boman at gmail.com
Fri Oct 31 10:14:08 CET 2008


2008/10/31 Simon Boman <simon.boman at gmail.com>:
> 2008/10/29 Jerry Van Baren <gerald.vanbaren at ge.com>:
>> Simon Boman wrote:
>>>
>>> I added this code to the uec.c file:
>>>        int i;
>>>        for(i=0;i<20;i++)
>>>           printf("PHY value %d is %x\n", i, phy_read(uec->mii_info, i));
>>>
>>> and got this to the prompt..
>>>
>>> PHY value 0 is 0
>>> PHY value 1 is 0
>>> PHY value 2 is 0
>>> PHY value 3 is 0
>>> PHY value 4 is 0
>>> PHY value 5 is 0
>>> PHY value 6 is 0
>>> PHY value 7 is 0
>>> PHY value 8 is 0
>>> PHY value 9 is 0
>>> PHY value 10 is 0
>>> PHY value 11 is 0
>>> PHY value 12 is 0
>>> PHY value 13 is 0
>>> PHY value 14 is 0
>>> PHY value 15 is 0
>>> PHY value 16 is 0
>>> PHY value 17 is 0
>>> PHY value 18 is 0
>>> PHY value 19 is 0
>>
>> Please don't top post.
>>
>> I think you first need to *find* your phy.  This is likely a
>> hardware/software issue: I/O lines, I/O configuration, PHY address
>> strapping.
>>
>> I wasn't advocating adding code to print PHY registers, I was advocating
>> using the "mii" command: "help mii".  If it isn't in your build, add it.
>>  Then do "mii device", IIRC, it will scan the MII bus to see who is out
>> there.  That will identify mis-strapped (or misunderstood strapping) PHY
>> address strapping.  If nobody answers the call, you likely have a I/O pin
>> misconfiguration or a more serious hardware problem.
>>
>> gvb
>
> I'm sorry, and thank you for your quick reply!
>
> I have now figured out that MDIO uses the SPI2-bus and what I can see
> U-boot does'nt support that. If it is, I will really appreciate if you
> tell me how to use it.
>
> /Simon
>

I can add that I have set the assignvalue so MDIO and MDC use SPI2,
but still it does'nt work.. any suggests?


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