Reg:Using in-built mdc/mdio in ls1021atwr board

[sivakumarkrishn]

In the existing ls1021atwr board , we were adding a marvel switch 88E6161 with the phy addr 0x4 in the MDC/MDIO 

path. But it is not reading it..

we are using the default mdio command in the u-boot , which is used to read the existing marvell phys 88e1111.

when we probe through CRO , while reading the switch , Turn around (TA) sequence is not appearing in . whereas as 

per the switch timing diagram(SMI) it is must. 

Is there any way to create TA in the in-built mdc/mdio? . 

will the Switch 88E6161 work with in-built mdc/mdio ..? or should we do gpio based mdc/mdio?

How to go ahead with this?

-Siva Kumar K

[sivakumarkrishn]

Refer timing diagram and SMI section details.. pull up resistor also mounted.. 

[ufedor]

Please provide all necessary additional information (including traces and documentation) to make complete technical description of the issue - what are you actually observing?

[sivakumarkrishn]

Sorry I didn’t get you.. what do you mean by traces..? CRO trace?

With regard to documentation I sent you the Timing details of the SWITCH WHICH WE USE..

W.r.t to the connectivity I explained you that MDC/MDIO OF ls102a is connected to the MDC/MDIO of switch (phy addr of this is 0x4).

If You need the complete datasheet of switch we use or anything else let me know ..

[ufedor]

Still not clear what is the issue.

Do you have digital scope or bus analyzer traces illustrating it?

[sivakumarkrishn]

Do you need digital scope traces ?..

[ufedor]

I need detailed technical description of the problem.

[sivakumarkrishn]

The problem is the way how we should connect the L2 (Marvell 88E6161)switch to processor interface.

If you can arrange a concall it will be easy to discuss..

[ufedor]

The LS1021A has its MDIO implemented in accordance with the Clause 22 of the IEEE Std 802.3 where TA is described.

It is still not clear which issue you observe.

[ufedor]

> when we probe through CRO , while reading the switch , Turn around (TA) sequence

> is not appearing in . whereas as per the switch timing diagram(SMI) it is must. 

Please provide all necessary additional information (including traces and documentation) to make complete technical description of the issue.