c6678 ethernet phy

Hi Srinivas,

The changes you described are all on the physical interface side of the PHY.  The connections on the SGMII side should be the same and the PHY to MAC connection should scale to whatever speed interface the PHY negotiates.  It shouldn't require any changes to the SGMII configuration.

I'm not clear on the state of the connection.  You state that the led linkup is to not present.  Is that the link led on pin B8 of the 88E1111? 

Regards, Bill

Hi Bill Taboada,

Thank you for your response. I have attached PHY schematic section if any hardware issues.

In void init_sgmii(uint32_t macPortNum) function changed  sgmiiCfg.linkSpeed = CSL_SGMII_100_MBPS;

In  sgmiiStatus.bIsLinkUp & sgmii_status.bIsAutoNegComplete flags are not set.
when i force to set sgmiiStatus.bIsLinkUp & sgmii_status.bIsAutoNegComplete then in console window PA,QMSS all are successfull
but IP address is not coming. laptop it is showing 10Mbps.

void init_sgmii(uint32_t macPortNum)

{

        CSL_SGMII_ABVABILITY  sgmiiCfg;

        CSL_SGMII_STATUS  sgmii_status;

        CSL_SGMII_doSoftReset(macPortNum);

        while(CSL_SGMII_getSoftResetStatus(macPortNum)!=0};

       if(macPortNum ==1)

       {

                    CSL_SGMII_startRxTxSoftReset(macPortNum);

                    CSL_SGMII_disableMasterMode(macPortNum);

                     CSL_SGMII_enableAutoNegotiation(macPortNum);

                    CSL_SGMII_enableLoopback(macPortNum);

                   CSL_SGMII_endRxTxSoftReset(macPortNum);

                   while(1)

                   {

                                      if(CSL_SGMII_IsLoopbackModeenabled((macPortNum))

                                    {

                                                  break;

                                       }

                        }

                      sgmiiCfg.linkSpeed = CSL_SGMII_100_MBPS;

                      sgmiiCfg.duplexMode= CSL_SGMII_FULL_DUPLEX;

                      CSL_SGMII_setAdvAbility(macPortNum,&sgmiiCfg);

                   do

                     {

                                           CSL_SGMII_getstatus（macPortNum，&sgmiiStatus）;

                          }while(sgmiiStatus.bIsLinkUp !=1)//in my project  ,when I run,sgmiiStatus.bIsLinkUp =0;and I force sgmiiStatus.bIsLinkUp =1

                do

                 {

                                      CSL_SGMII_getstatus（macPortNum，&sgmii_status）;

                      }while(sgmii_status.bIsAutoNegComplete !=1)

        }

        else

         {

                  .....................................

          }

}

Please let me know any clarifications.

Thanks & regards,

SrinivasaPrasad

1581.PHY interface.pdf

Hi Srinivasa,

Let me provide some more information and ask some additional questions.

1) The schematic you sent show a standard 10/100 connection to the RJ45 connector and you have stated that you are seeing a 10Mbit connection to a laptop. Have you checked with Marvell to be sure that the 88E1111 can be connected in this manner?  How are you connecting to the laptop?  Are you using a cross-over cable or a hub?  Is the laptop running a DHCP server?

2) The 88E1111 negotiates with the physical network to determine the wire speed and then acts as the master for the SGMII negotiation to inform the C6678 of the negotiated speed.  There is no reason to set the SGMII link speed to 100 since the PHY will determine the speed of the interface.  The configuration delivered with the MCSDK should work without modification.  Note that the 88E1111 should connect with the network without any intervention from the C6678.  It will establish a link even if the SGMII interface is not active and you should see the appropriate link LED light.  If you are seeing a 10Mbit link with the laptop it is an issue with the 88E1111 and not the C6678.

Regards, Bill

Hi Bill,

1.In Marvell Phy 88E111 datasheet  for E10/100  this option is given

I have sent  schematic to Marvell technical team for further verification.

Magnetic s TX+, TX-   are connected to laptop RX+, RX-  and vice versa as per link available

http://www.incentre.net/ethernet-wiring-diag.html

Laptop i have configured manually  ip address 192.168.7.190 subnetmask255.255.255.0 gateway 192.168.7.190(same as IP called in Client.c file)

i tried for ping 192.168.7.190 in command prompt but it is showing message request time out. However with Eval boardC6678 setup same code ping is working .

2.I tried PHY 100 Mbps software configuration using MDC/MDIO interface but it is not working.

Thanks & regards,

SrinivasaPrasad.

Hi Srinivasa,

If you have access to the 88E1111 using the MDC/MDIO interface then  you can read the status registers for that device.  Check the status and see what the state of the PHY is on your board.  You should be able to read the first three registers which will give you the PHY configuration and the status of the PHY. 

Regards, Bill

Hi Bill,

Thank you for your inputs. I have interchanged TX  and RX of ethernet cable. Iam getting 100mbps on Laptop.

100Mbps led link is glowing. LED RX led is blinking when iam giving ping command in Laptop. In Laptop  Network connection status  send count is changing but receive is always zero. Request time out is showing for ping command.

In void init_sgmii(uint32_t macPortNum) function changed  sgmiiCfg.linkSpeed = CSL_SGMII_100_MBPS;

In  sgmiiStatus.bIsLinkUp & sgmii_status.bIsAutoNegComplete flags are not set.
when i force to set sgmiiStatus.bIsLinkUp & sgmii_status.bIsAutoNegComplete then in console window PA,QMSS all are successfull

but IP address is not coming.

Please give some more inputs.

Thanks & regards,

SrinivasaPrasad.