Emac Softreset behavior

Christian Riesch

Other Parts Discussed in Thread: AM1808

Hi,

Could you please clarify the behavior of the SOFTRESET Register in the EMAC module (section 18.3.3.34 in the TRM). The manual says this resets the EMAC module only, however after a bit of debugging in the Linux driver it seems that this reset also resets the MDIO module. The MDIO module's control register is set to the default values after a softreset of the mac module. Can you confirm this?

Thank you! Regards, Christian

over 12 years ago

0 Christian Riesch over 12 years ago

Intellectual 710 points

I forgot to mention that I observed this on an AM1808.

0 AnantGole over 12 years ago in reply to Christian Riesch

TI__Prodigy 570 points

Christian,

This is not the expected behavior - EMAC and MDIO reset's are separate. Since you are seeing it happen on 18x, we will reproduce it and find the root cause and also test on other platforms and get back to you.

Regards,

Anant

0 Sudhakar Rajashekhara over 12 years ago in reply to AnantGole

TI__Expert 5170 points

Hi,

This is also being discussed in Linux DaVinci mailing list at http://linux.davincidsp.com/pipermail/davinci-linux-open-source/2012-February/023960.html.

Regards, Sudhakar

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Emac Softreset behavior