P2020 with BCM53115

P2020 with BCM53115

[Dry, Craig]

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I am trying to bring up a P2020 board which uses the Broadcom BCM53115 switch in unmanaged mode.  The board is patterned after the P2020RDB, except the Vitesse switch has been replaced with a BCM53115. There is no MDIO connection to the switch, but there is  an SPI connection available if needed.

When running Uboot, the BCM53115 works just fine, as I am able to download the Linux Kernel and P2020RDB.dtb across the network without issue.   But as Linux is booting up, I get the message:

mdio_bus mdio@ffe24520: error probing PHY at address 0
mdio_bus mdio@ffe24520: error probing PHY at address 1

I expect these errors occur because the P2020RDB.dts file has these entries.

I'm not sure what to try next to get Linux to use the BCM53115 switch in unmanaged mode.

Any help is appreciated,
Thanks,
Craig

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Re: P2020 with BCM53115

[Scott Wood]

On Mon, 20 Dec 2010 13:08:55 -0500
"Dry, Craig" <cdry@mc.com> wrote:

> I am trying to bring up a P2020 board which uses the Broadcom BCM53115 switch in unmanaged mode.  The board is patterned after the P2020RDB, except the Vitesse switch has been replaced with a BCM53115. There is no MDIO connection to the switch, but there is  an SPI connection available if needed.
> 
> When running Uboot, the BCM53115 works just fine, as I am able to download the Linux Kernel and P2020RDB.dtb across the network without issue.   But as Linux is booting up, I get the message:
> 
> mdio_bus mdio@ffe24520: error probing PHY at address 0
> mdio_bus mdio@ffe24520: error probing PHY at address 1
> 
> I expect these errors occur because the P2020RDB.dts file has these entries.
> 
> I'm not sure what to try next to get Linux to use the BCM53115 switch in unmanaged mode.

See the fixed-link property in
Documentation/powerpc/dts-bindings/fsl/tsec.txt

-Scott

Re: P2020 with BCM53115

[Abraham Yaniv]

> Scott Wood <scottwood <at> freescale.com> writes:
> 
> On Mon, 20 Dec 2010 13:08:55 -0500
> "Dry, Craig" <cdry <at> mc.com> wrote:
> 
> > I am trying to bring up a P2020 board which uses the Broadcom BCM53115 
switch in unmanaged mode.  The board is
> patterned after the P2020RDB, except the Vitesse switch has been replaced with 
a BCM53115. There is no
> MDIO connection to the switch, but there is  an SPI connection available if 
needed.
> > 
> > When running Uboot, the BCM53115 works just fine, as I am able to 
download the Linux Kernel and
> P2020RDB.dtb across the network without issue.   But as Linux is booting up, I 
get the message:
> > 
> > mdio_bus mdio <at> ffe24520: error probing PHY at address 0
> > mdio_bus mdio <at> ffe24520: error probing PHY at address 1
> > 
> > I expect these errors occur because the P2020RDB.dts file has these entries.
> > 
> > I'm not sure what to try next to get Linux to use the BCM53115 switch in 
unmanaged mode.
> 
> See the fixed-link property in
> Documentation/powerpc/dts-bindings/fsl/tsec.txt
> 
> -Scott
> 

Hi there Craig!
I have the same setup (Freescale P2020 CPU with Broadcom BCM53115 switch) 
but I'm having a hard time bringing it up.
The P2020's eTSEC2 is connected to port 5 (WAN) of the BCM53115.
I managed to make a link up status on the BCM53115 port 5 but I believe this is a
false link up because no traffic is passing between the P2020 and the BCM53115
and the BCM53115 SerDes/SGMII status register says there is a False Carrier 
situation.
The P2020 eTSEC is configured to SGMII/TBI (ECNTRL[SGMIIM]=1, 
ECNTRL[TBIM]=1, and MACCFG2[I/F]=10).
Is there a chance you can share with me what is the configuration required 
to my BCM53115 to make a true link up?
Thanks a million,
Yaniv