TDA4AH-Q1: Recovery booting via QSPI NOR RBL TDA4AH

Dariusz Gasiorowski

Part Number: TDA4AH-Q1

Hi,

I have a question regarding potential possibility of recovery booting (for tiboot3.bin) via QSPI NOR RBL of TDA4AH.

Suppose the primary booting of tiboot3.bin will be done from QSPI NOR flash and the backup boot mode is set to WKUP_UART0.

Normal booting flow is tiboot3.bin -> tispl.bin and next u-boot.img then some OS is loaded.

If the first instance of the tiboot3.bin image fails to boot, I would like to that RBL will be able to load the second copy of tiboot3.bin instance from a different offset for primary QSPI NOR flash booting.
This second (backup) instance of booting flow should cover also the rest of the backup images tispl.bin and u-boot.img stored in different offset.

Could you please provide detail information if such or similar functionality exist for the TDA4AH and can be checked on J784S4 EVM ?

Best regards,

Dariusz

over 1 year ago

+1 Parth Nagpal over 1 year ago

TI__Mastermind 42135 points

Hi Dariusz,

We do have backup read address option for flashes, Refer to the initialization section of TRM

Once you are able to pick up the SBL from backup address, you can modify the SBL to pickup the rest of the images from a different address

Regards,
Parth

0 Dariusz Gasiorowski over 1 year ago in reply to Parth Nagpal

Prodigy 80 points

Hi Parth,

Great news, I checked it works in case of copy of tiboot3.bin. Thanks a lot! By the way, do you know all files/places in the source of SDK v9 where the rest addresses should be changed statically (for each binary of tiboot3.bin, tispl.bin and u-boot.img)? Or maybe these addresses can be changed dynamically inside code? Seems there are 3 files for static config in uboot /arch/arm/dts/k3-j784s4-evm.dts and config/j784s4_evm_a72_defconfig and j784s4_evm_r5_defconfig I 'am not sure if that's all.

Best regards,

Dariusz

0 Parth Nagpal over 1 year ago in reply to Dariusz Gasiorowski

TI__Mastermind 42135 points

Hi,

Please expect a little delay in response due to holiday in India today.

Regards,
Parth

0 Dariusz Gasiorowski over 1 year ago in reply to Parth Nagpal

Prodigy 80 points

Hi Parth,

Regarding backup booting of uboot flow for TDA4. Is it possible to prepare the same binary-equal images for first and second instances of tiboot3.bin, tispl.bin and uboot.img ? In other words to get similar functionality as RBL in case of loading tiboot3.bin from first and second backup offset.

So, for example is it possible to set first instance offset: CONFIG_SYS_SPI_U_BOOT_OFFS=0x280000 and some second offset eg: CONFIG_SYS_SPI_U_BOOT_OFFS_for_backup=0xXXXXX in defconfig for A72? And similarly for r5 CONFIG_SYS_SPI_U_BOOT_OFFS=0x80000.

Regards,

Dariusz

+1 Keerthy J over 1 year ago in reply to Dariusz Gasiorowski

TI__Guru**** 150770 points

Hi,

Dariusz Gasiorowski said:
So, for example is it possible to set first instance offset: CONFIG_SYS_SPI_U_BOOT_OFFS=0x280000 and some second offset eg: CONFIG_SYS_SPI_U_BOOT_OFFS_for_backup=0xXXXXX in defconfig for A72? And similarly for r5 CONFIG_SYS_SPI_U_BOOT_OFFS=0x80000

This is not supported.

Layout does not give that much room as well:

https://software-dl.ti.com/jacinto7/esd/processor-dk-linux-j784s4/08_06_00_12/exports/docs/linux/Foundational_Components/U-Boot/UG-QSPI.html

...

Best Regards,
Keerthy

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TDA4AH-Q1: Recovery booting via QSPI NOR RBL TDA4AH