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TSE MAC MARVEL 88EE1111; S4GX 530 Dev Kit

Altera_Forum
Honored Contributor II
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Hi All, 

 

I am trying to get a stand alone TSE MAC (so no NIOS in the design) up and running on my S4GX530 dev board. 

 

Setup: 

SGMII interface from the TSE MAC communicates with the external Marvel 88EE1111 Phy. Ethernet connection (crosscable) from the Phy to a PC. 

 

Unfortunately, I can not get the AUTO_NEGOTIATION functionality up and running. 

 

I configure the MAC as follows: 

 

Wr 0xFE to 0x0F -- write PhyId 

Rd 0x91 -- read Pcs revision 

Wr 0xCDEF to 0x90 and readback is ok 

Wr 0x0D40 to 0x92 --linktimer 0 

Wr 0x0003 to 0x93 --linktimer 1 

Wr 0x0003 to 0x94 --if_mode, SGMII_ENA = 1, USE_SGMII_AN = 1 

Wr 0x1140 to 0x80 --pcs ctrl, AUTO_NEGOTIATION_ENA = 1 

Wr 0x9140 to 0x80 --pcs ctrl, Soft reset 

poll 0x81 until bit (5) (Auto_negotiation_done) goes to 1 

 

The Auto_negotiation bit goes never to 1. In stead I keep reading 0x8D.... 

 

Does anybody had a similar issue? Does anybody know what could cause the malfunction of the auto_negotiation? 

 

In Advance, thanks for your help 

 

PS: I apply a 160 ms reset to the Marvel 88ee1111 chip followed by a 160 ms inactive period before I start configuring the mac
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