TDA4VM: Compatible SGMII PHYs for TDA4VM

John Weber

Part Number: TDA4VM
Other Parts Discussed in Thread: DP83869HM,

Hi There,

We have a requirement to utilize SGMII PHYs as well as QSGMII PHYs in our product.

The following shows that in the PSDK Linux, the ethernet switch is managed by firmware running on one of the R5F cores:

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-rt-jacinto7/latest/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Network/CPSWng_virt_mac.html

Thus, the low level driver for the PHY would be located the PDK RTOS.

https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/latest/exports/docs/pdk_jacinto_08_04_00_21/docs/apiguide/j721e/html/enetphy_guide_top.html

It seems to support 4 PHY drivers, none of which are SGMII.

I have seen the relevant e2e links discussing issues with SGMII:

Developer that wants to use a Marvell PHY:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1032510/tda4vm-mcu2_0-cpsw9g-sgmii-connect-with-phy-marvell-88ea1512

Comment: "We do not integrate or support 3P PHY's, you will have to talk to Marvell to get a compatible PHY driver and integrate it with ENET-LLD. Take a look at this integration guide for help"

Timing validation (using a TI 1000Base T1 PHY, which supports single-pair Ethernet, or SPE, at up to 1000mbps):

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1124240/tda4vm-q1-tda4vm-sgmii-phy-timings-validation

Unfortunately we need a standard GbE PHY, not 1000Base-T1

Another developer asking for list of compatible SGMII PHYs:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1134597/tda4vm-q1-check-compatibility-with-sgmii-based-ethernet-phy?tisearch=e2e-sitesearch&keymatch=SGMII%252520on%252520TDA4VM#

Another developer using Marvell PHY (88Q5072, an automotive Ethernet 100BaseT1, supports SPE at up to 100 mbps):

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1115220/tda4vm-tda4-isn-t-update-sgmii-link-status-in-the-initialization-phase/4218479?tisearch=e2e-sitesearch&keymatch=SGMII%25252520on%25252520TDA4VM#4218479

Has TI worked with any SGMII PHYs that support standard 1000Base-T copper Ethernet ports? Even TI's own SGMII PHYs?

If not, can you please provide steps regarding how to bring up such a PHY?

Thanks!

over 2 years ago

0 Tanmay Patil over 2 years ago

TI__Mastermind 38720 points

Hi,

John Weber said:
Has TI worked with any SGMII PHYs that support standard 1000Base-T copper Ethernet ports? Even TI's own SGMII PHYs?

We use DP83869HM phy to validate SGMII on EVM. I believe that this has GbE support as well.

I will be forwarding this ticket to the phy team, so feel free to ask any further questions you may have.

Regards,
Tanmay

0 John Weber over 2 years ago in reply to Tanmay Patil

Intellectual 511 points

OK. That's good news. I will check this part.

Can TI provide code patches/documentation to enable this PHY option on the PDK?

0 Tanmay Patil over 2 years ago in reply to John Weber

TI__Mastermind 38720 points

Hi,

In which environment are you going to develop? You can either work with native ethernet driver on linux or develop with Ethfw. For PDK (ethfw), you will find the info here.

Regards,
Tanmay

0 John Weber over 2 years ago in reply to Tanmay Patil

Intellectual 511 points

We are developing mostly for Linux, but we will be utilizing multiple CPSW9 ports on TDA4VM. Based on the docs and other e2e posts, it seems that we needed to utilize the ethfw (PDK).

However, in your Ethfw, you do not have support for the DP83869HM PHY (as I mentioned my the post above).

0 John Weber over 2 years ago in reply to John Weber

Intellectual 511 points

In addition, where can we find schematics for this? OK to send to us via email as well.

0 John Weber over 2 years ago in reply to Tanmay Patil

Intellectual 511 points

Tanmay,

I have seen the PHY porting guide already. What we are looking for is the code used to bring up the DP83869HM PHY. This would appear to be changes to the EthFw source code.

Thanks,

John

0 Tanmay Patil over 2 years ago in reply to John Weber

TI__Mastermind 38720 points

Hi,

John Weber said:
In addition, where can we find schematics for this? OK to send to us via email as well.

Are you asking about the schematics for DP83869HM board we use for testing?

John Weber said:
What we are looking for is the code used to bring up the DP83869HM PHY.

I will check up on this and get back to you.

Regards,
Tanmay

0 John Weber over 2 years ago in reply to Tanmay Patil

Intellectual 511 points

Hi -

Yes - I'm asking about schematics for the DH83869HM used for testing, and for the code used to bring the PHY up. Presumably, this will be a patch to the PDK Ethernet PHY driver code.

Thanks!

+1 Tanmay Patil over 2 years ago in reply to John Weber

TI__Mastermind 38720 points

Hi,

Sorry for the delay in response.

I believe we used generic phy driver for testing with DP83869HM.

John Weber said:
schematics for the DH83869HM used for testing

I am checking if we can share the schematic with you. I will update the status of this query here in couple of days.

Regards,
Tanmay

0 Tanmay Patil over 2 years ago in reply to Tanmay Patil

TI__Mastermind 38720 points

Hi,

Additionaly, for controlling the ethernet drivers from A72, you can move to native linux driver. The documentation can be found here : CPSWng Native Ethernet — Processor SDK Linux for J7200 Documentation[3].pdf. J7200 and J721e both have the same CPSW IP (number of ports are changed though) and hence same documentation will be applicable. You can use native linux driver SDK8.4 onward. You can find the steps to do the same here.

Regards,
Tanmay

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TDA4VM: Compatible SGMII PHYs for TDA4VM