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
