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

[Jerry Van Baren <gerald.vanbaren@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

> 2008/10/29 Jerry Van Baren <gerald.vanbaren@ge.com>:
>> Simon Boman wrote:
>>> Hi!
>>>
>>> I have a modified MPC8360 platform with a PHY named BCM5461 and UEC as
>>> Ethernet Controller. I started with the MPC8360EMDS card from U-boot
>>> and then modified it so that it match the card (what I know). I am
>>> using the git-version of U-boot from October, 20, 2008.
>>> The problem is that I can't even get contact with the PHY. It says
>>> it's a generic phy, but even with that I can't get any contact to it
>>> and the phy_ID u-boot prints is just 0.
>>>
>>> "UEC: PHY is Generic MII (0)"
>>> "warning: FSL UEC0: timeout on PHY link"
>>>
>>> Hereafter the u-boot just hanging..
>>>
>>> TIA
>>> Simon
>> What does the MII command tell you about your MII bus in general and your
>> PHY's registers?
>>
>> gvb
>>