C6678 SGMII registers

Oleg Miloserdin

HI! I'm working with my custom board using C6678 DSP based upon EVM6678 board design. In evmc6678l.gel GEL file for EVM6678 board I've found the settings for SGMII_SERDES_AUX_CFG_PORT0 and SGMII_SERDES_AUX_CFG_PORT1 registers located at 0x02090138 and 0x02090238. But in 1GE Switch Subsystem User Guide (sprugv9d) these addresses are marked as reserved (Table 3-7 at page 3-16). What are these registers for and how should I use them?

Another question: configSGMIISerdes() function at evmc6678l.gel GEL file for EVM6678 board configures MAC_CONTROL and MAC_RX_MAXLEN registers for both ports, but configSerdes() function at platform library from PDK_C6678_1_1_2_6 doesn't configure MAC ports. Why?

over 11 years ago

0 Pubesh over 11 years ago

TI__Mastermind 20790 points

Hi,

I did not find those registers for reserved in the table.

The configSGMIISerdes and configSerdes are two different function calls used in gel and source file(.c).
You can see Init_SGMII function in the evmc6678_phy.c for SGMII init and MAC.

0 Oleg Miloserdin over 11 years ago in reply to Pubesh

Intellectual 530 points

Hi Pubesh!

Offset address 38h at which SGMII_SERDES_AUX_CFG register is located is marked as reserved in Table 3-7.

0 Pubesh over 11 years ago in reply to Oleg Miloserdin

TI__Mastermind 20790 points

Oleg,

Thanks for your notification. I will check with team regard this.

0 Pubesh over 11 years ago in reply to Pubesh

TI__Mastermind 20790 points

Oleg,

Please find the some more details here.
In SPRUGV9D, Table 3-3 or 3-7, those registers are reserved.
We have cross checked in the CSL source code: ti\pdk_C6678_1_1_2_6\packages\ti\csl,

These registers are grouped in structure CSL_CpsgmiiRegs. The offset 0x138 or 0x238 corresponds to AUX_CFG_REG. In a separate file, it mentioned “* auxCfgVal SERDES PLL configuration value.”
You can find the details for SERDES PLL , Go back to SPRUGV9D, SGMII_SERDES_CFGPLL this is defined in 3.6.2.

0 Oleg Miloserdin over 11 years ago in reply to Pubesh

Intellectual 530 points

Hi Pubesh!

So, should I set SGMII_AUX_CFG_REG register to the same value as SGMII_SERDES_CFGPLL register, or leave it without change?

0 Pubesh over 11 years ago in reply to Oleg Miloserdin

TI__Mastermind 20790 points

Oleg,

You can leave it without change.

Processors

Processors forum

C6678 SGMII registers