LS1021A eTSEC SGMII connection to Marvell Sw over chip to chip interface

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LS1021A eTSEC SGMII connection to Marvell Sw over chip to chip interface

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Contributor III

I am unable to receive packets when I connect my fixed-link SGMII  ls1021a ethernet port directly to a Marvell 88E6185 Switch port running in chip to chip mode. Does anyone know if the eTSEC interface support  a compatible mode and how to configure it.  

Thank You 

Bill

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Contributor III

Alexander,

  Do you happen to know (or know someone to ask) if the eTSEC interface on the ls1021a can be configured to have an internal tranceiver?

The value seemed to be ignored when I set it from ethtool.  Our theory is that the Interface on the Marvell chip is waiting on a sync command to bring the link up

I believe I need a transceiver to in order to generate the sync.

Thanks

Bill Anderson

  Ethtool reports

root@LS1021A-Artel:~# !et
ethtool eth1
Settings for eth1:
        Supported ports: [ MII ]
        Supported link modes:   1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Advertised link modes:  1000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  1000baseT/Full
        Link partner advertised pause frame use: No
        Link partner advertised auto-negotiation: No
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x0000003f (63)
                               drv probe link timer ifdown ifup
        Link detected: yes

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NXP TechSupport
NXP TechSupport

No, eTSEC interface in LS1021A device does not have internal transceiver

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Contributor III

Alexander,

Thank you for your quick response.

Bill

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NXP TechSupport
NXP TechSupport

I do not have full datasheet for 88E6185, but according to "product brief" document (link below) this switch does not support direct connection to MAC controller via SGMII interface. This document states this switch supports only GMII or MII modes for MAC connection.

http://www.marvell.com.cn/switching/assets/marvell_linkstreet_88E6182_product_brief.pdf 


Have a great day,
Alexander

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