TDA4VM: OSPI PHY Tuning vectors

Prasanna Raghunathan

Part Number: TDA4VM
Other Parts Discussed in Thread: UNIFLASH, AM2431,

Hi,

I am currently working on bringing up our custom board with TD4AVM platform. Most of our board is based on the J721E-SOM with an exception being the OSPI Flash device. The board is using the same device as on the SK-TDA4VM - Infineon S28HL512T.

Do I need to run the PHY Tuning algorithm to generate the vectors before I can start using the flash device ? Is there any defaults that I can use for this flash device ?
On the AM2431 EVM, the mcu_plus_sdk has some defaults defined for the flash in the uart_uniflash tool. I am wondering if those vectors can be re-used ?
I got the board up and running with UART Boot. I loaded a linux image and then performed some flash access, it does seem to work but it is very slow compared to the EVM.
Based on my previous experince with the AM2431 EVM , If the vectors are not present , I believe the R5 SPL will automatically fallback to configure the Controller to use the slower speeds in regular SPI mode.
Using the same tiboot3.bin, sysfw and tispl, I am not able to boot from the OSPI Flash. I am not sure if this is due to the PHY not tuned or a secondary issue with my images. Simple flash reads and writes are working from Uboot.

Thanks,

Prasanna

2 months ago

0 Diwakar Dhyani 2 months ago

TI__Guru 68075 points

Thanks for reaching out , allow us some time to respond on this.

Regards
Diwakar

0 Prasanna Raghunathan 2 months ago in reply to Diwakar Dhyani

Prodigy 110 points

Hi Diwakar,

I did some digging and came across this FAQ that talks about the said flash part and says that it is recommended to use xSPI boot mode with these Infineon Semper flash instead of OSPI. Please confirm if this indeed applicable for the TDA4VM ROM code as well.

[FAQ] AM62x, AM62Px, AM62D-Q1, AM64x, AM275x: S28HS512T boots in xSPI Bootmode but not in OSPI Bootmode - Processors forum - Processors - TI E2E support forums

Thanks,

Prasanna

0 Brijesh Jadav 2 months ago in reply to Prasanna Raghunathan

TI__Guru**** 499375 points

Hi,

Please refer to Errata i2115. Some xSPI mode are not supported on J721E. I think you can boot first boot loader in lower speed and then can switch to higher speed in the boot loader.

Regards,

Brijesh

0 Prasanna Raghunathan 2 months ago in reply to Brijesh Jadav

Prodigy 110 points

Hi Brijesh,

This is the errata that I found for J721e.

https://www.ti.com/lit/er/sprz455f/sprz455f.pdf?ts=1778155045156 - I see Errata i2366.

Thanks,

Prasanna

0 Brijesh Jadav 2 months ago in reply to Prasanna Raghunathan

TI__Guru**** 499375 points

Hi,

That's related to SFTB table, are you using SFTB table in the flash?

Regards,

Brijesh

0 Prasanna Raghunathan 2 months ago in reply to Brijesh Jadav

Prodigy 110 points

Hi Brijesh,

The FAQ i posted is the right procedure to follow. For these Infineon Semper Flash the boot mode must be xSPI and cannot be OSPI. The TI BootROM cannot handle these natively, so xSPI is the way to go. The board boots up in xSPI boot mode without any issues.

Please help on generating the PHY Tuning vectors/ to enable OSPI operation in full capacity.

Thanks,

Prasanna

0 Brijesh Jadav 2 months ago in reply to Prasanna Raghunathan

TI__Guru**** 499375 points

Hi,

PHY tuning algo is already available in the SDK. When you boot SBL from xSPI/OSPI, SBL runs the phy tuning, when PHY is enabled. You would just need to write tuning data in last sector of the flash.

Regards,

Brijesh

0 Prasanna Raghunathan 2 months ago in reply to Brijesh Jadav

Prodigy 110 points

Hi Brijesh,

That is exactly why I opened this thread. Where do I find this tuning data/tuning vectors ? From where can i get this data ?

Is it available in the Yocto TI ARAGO SDK or MCU SDK ?

Currently, I see "Pattern not found. Skipping calibration" message in the A72 SPL.

Thanks,

Prasanna

0 Diwakar Dhyani 2 months ago in reply to Prasanna Raghunathan

TI__Guru 68075 points

Will respond to you within 2 days .

Regards

Diwakar

0 Prasanna Raghunathan 2 months ago in reply to Diwakar Dhyani

Prodigy 110 points

Hi Diwakar,

Just to clarify, I already have a flash partition defined for this purpose and I prefer the PHY Tuning to run every time during bootup using the pattern stored in the flash, unless you advise otherwise. The only missing piece is the Tuning pattern/Tuning vectors themselves to be saved to the flash. Will wait to hear back from you.

Thanks,

Prasanna

0 Diwakar Dhyani 2 months ago in reply to Prasanna Raghunathan

TI__Guru 68075 points

Hi Prasanna,

PHY calibration pattern can be found in the SDK documentation. Please refer to the "PHY Calibration" section of the documentation linked below.

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-sk-tda4vm/11_00_00/exports/docs/linux/Foundational_Components/U-Boot/UG-QSPI.html

Regards
Diwakar