[LS1028A]:QSGMII link is not coming up in u-boot

[gjohnsona2e]

We have a custom board using the LS1028A(actually a VA7230) with a VSC8574RT ethernet quad PHY.  The LS1028 is connected to the PHY using QSGMII.  In the u-boot build (defconfig), I have enabled CONFIG_PHY_MSCC and disabled CONFIG_PHY_VITESSE.  Once u-boot comes up I am running these commands:

> setenv ethact swp3
> setenv ipaddr 192.168.1.3
> ping 192.168.1.1

Swp3 is directly connected to a PC with a static ip address of 192.168.1.1.

The ping times out and the host is not alive.

After further investigation, we have determined the following:
1) All of the external PHY's are detected and listed in the emdio-3 interface using the "mii info" command

2) The external PHY says that the link is up

3) The internal PHY says that the link is down

=> mii device enet-2
=> mii dump 3 1           
1.     (0009)                 -- PHY status register --                                                             
  (8000:0000) 1.15    =     0     100BASE-T4 able                                                                   
  (4000:0000) 1.14    =     0     100BASE-X  full duplex able                                                       
  (2000:0000) 1.13    =     0     100BASE-X  half duplex able                                                       
  (1000:0000) 1.12    =     0     10 Mbps    full duplex able                                                       
  (0800:0000) 1.11    =     0     10 Mbps    half duplex able                                                       
  (0400:0000) 1.10    =     0     100BASE-T2 full duplex able                                                       
  (0200:0000) 1. 9    =     0     100BASE-T2 half duplex able                                                       
  (0100:0000) 1. 8    =     0     extended status                                                                   
  (0080:0000) 1. 7    =     0     (reserved)                                                                        
  (0040:0000) 1. 6    =     0     MF preamble suppression                                                           
  (0020:0000) 1. 5    =     0     A/N complete                                                                      
  (0010:0000) 1. 4    =     0     remote fault                                                                      
  (0008:0008) 1. 3    =     1     A/N able                                                                          
  (0004:0000) 1. 2    =     0     link status                                                                       
  (0002:0000) 1. 1    =     0     jabber detect                                                                     
  (0001:0001) 1. 0    =     1     extended capabilities    

I have compared this same setup with the LS1028ARDB devkit (which uses a VSC8514 external PHY) and it reports that its internal PHY link is up:

=> mii dump 3 1                                                                                                                                                                                                           
1.     (002d)                 -- PHY status register --                                                                                 
  (8000:0000) 1.15    =     0     100BASE-T4 able                                                                                       
  (4000:0000) 1.14    =     0     100BASE-X  full duplex able                                                                           
  (2000:0000) 1.13    =     0     100BASE-X  half duplex able                                                                           
  (1000:0000) 1.12    =     0     10 Mbps    full duplex able                                                                           
  (0800:0000) 1.11    =     0     10 Mbps    half duplex able                                                                           
  (0400:0000) 1.10    =     0     100BASE-T2 full duplex able                                                                           
  (0200:0000) 1. 9    =     0     100BASE-T2 half duplex able                                                                           
  (0100:0000) 1. 8    =     0     extended status                                                                                       
  (0080:0000) 1. 7    =     0     (reserved)                                                                                            
  (0040:0000) 1. 6    =     0     MF preamble suppression                                                                               
  (0020:0020) 1. 5    =     1     A/N complete                                                                                          
  (0010:0000) 1. 4    =     0     remote fault                                                                                          
  (0008:0008) 1. 3    =     1     A/N able                                                                                              
  (0004:0004) 1. 2    =     1     link status                                                                                           
  (0002:0000) 1. 1    =     0     jabber detect                                                                                         
  (0001:0001) 1. 0    =     1     extended capabilities      

What could be causing the internal PHY to not complete auto-neg and not bring the link up?

[June_Lu]

Please kindly share the RCW setting related to the SerDes, the DTS setting,

And all the difference of the QSGMII part between the LS1028ARDB and the customer board.

Thanks