J7200XSOMXEVM: Access to Ethernet Switch CPSW2G from A72 running LINUX

Ghassen souissi

Prodigy 50 points

Part Number: J7200XSOMXEVM

Tool/software:

Hello,

I have an issue concerning the CPSW2G of the EVM J7200.

According to documentation, this switch is directly connected to MCU Island but not to A72 core.

With Linux running on A72, I can get 2 interfaces (eth0 and eth1) using ifconfig.

Also I can do ping and SSH using eth0.

So my question here, how can the A72 core (from main domain) access to CPSW2G from MCU domain? (in both sides sw and hw)

In the documentation I found this slide:

I can see that MCU R5 is directly connected to CPSW2G, but A72 is not connected.

My second question: Is the 2 circled layers the same? (switchdev driver and Ethernet Switch Driver)

If yes, So this is the direct connection to CPSW2G?

Thank you for your help

2 months ago

0 Doredla Sudheer Kumar 2 months ago

TI__Guru 55880 points

Hi,

Ghassen souissi said:
According to documentation, this switch is directly connected to MCU Island but not to A72 core.

J7200 has two instances of CPSW.

CPSW2G is from MCU Island.
CPSW5G from Main Island.

Ghassen souissi said:
With Linux running on A72, I can get 2 interfaces (eth0 and eth1) using ifconfig.

Also I can do ping and SSH using eth0.

So my question here, how can the A72 core (from main domain) access to CPSW2G from MCU domain? (in both sides sw and hw)

Main Domain can access MCU Domain peripherals and vice versa via System Inter-connect using common bus.
Memory of CPSW is accessible from A72 so S/W is above to program and use it.

A72 Linux has Native Linux Driver support for CPSW2G, CPSW5G also, remote proxy client driver for CPSW5G where CPSW5G is controlled by Main R5F MCU2_0 core using ETHFW server application.
One can use how to use CPSW5G either Native Linux Drive from A72 controlling CPSW or ETHFW based server and client model with CPSW is controlled by Main R5F.

Also, refer to below FAQ for the details about CPSW support in J7 devices and S/W support model.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1350320/faq-tda4vm-details-information-about-cpsw-instances-supported-in-j7-devices-and-software-supported-from-ti-sdk

Best Regards,
Sudheer

0 Doredla Sudheer Kumar 2 months ago in reply to Doredla Sudheer Kumar

TI__Guru 55880 points

Hi,

Also, refer to FAQ below for bring-up of Ethernet interfaces in Linux for Main Domain CPSW instances.
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1264445/faq-how-do-i-bring-brought-up-ethernet-interfaces-for-main-domain-cpswng-in-linux-from-sdk-version-9-0-and-above

Best Regards,
Sudheer

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J7200XSOMXEVM: Access to Ethernet Switch CPSW2G from A72 running LINUX