[U-Boot] U-boot timeout with KSZ8021 phy

Alexandre Pereira da Silva
2013-07-11T20:13:35Z

On Thu, Jul 11, 2013 at 4:55 PM, Marek Vasut <marex@denx.de> wrote:
> Dear Alexandre Pereira da Silva,
>
>> Hi,
>>
>> I am trying to make my ethernet work with u-boot on a custom IMX28 board.
>>
>> This board uses the micrel KSZ8021 phy.
>>
>> The network works fine on linux but won't work properly on u-boot.
>>
>> Here is the output:
>> => dhcp
>> BOOTP broadcast 1
>> DHCP client bound to address 192.168.1.103
>> Using FEC device
>> TFTP from server 192.168.1.54; our IP address is 192.168.1.103
>> Filename 'uImage'.
>> Load address: 0x42000000
>> Loading: T T T T
>>
>> I am using the apx4devkit board configuration
>
> Seems unmaintained :-(
>
>> as a base for my port,
>> but adapted the phy setting to the KSZ8021 needed value. If that phy
>> configuration value is wrong, it doesn't even get an IP address from
>> DHCP.
>>
>> Marek's patch about cache didn't help much in my case.
>
> Try "dcache off" on command line, do you have any luck then ?

dcache off doesn't help either.

> Also try copying the network section from M28EVK, as M28EVK uses KSZ8021 PHYs. I
> also noticed the M28EVK resets the PHYs, so maybe you need to handle that ? On
> M28EVK this is handled in board/denx/m28evk/m28evk.c

By mistake, I forgot to add reset pin for the phy, so I am leaving the
phy always enabled.

I did try using M28EVK and MX28EVK board ports as well, but none worked so far.

Do I have do anything special for the NC pins of IMX280?

> Moreover, check if your CLKCTRL ENET settings are correct, that's also handled
> in the same function as the PHY reset on M28EVK I think (or at least in the same
> section).

That doesn't seem to be wrong. I see a clean 50MHZ clock on that pin.