AM6442: AM6442: EMMC booting failing

Hi Nayana,

I have assigned your query to our expert. Please provide actual steps and logs for expert to analyze. 

Best Regards,

Suren

Hello,

Can you please share the flashing logs and the commands you used to modify the partconf and bootbus?

Thanks!

Hello Prashant,

I have set the command mmc partconf 0 1 1 1 and mmc bootbus 0 2 0 0.
I have shared the log of setting and rebooting where it is booting from mmc2
Please let me know the possible issue and solution 

=> mmc dev 0
switch to partitions #0, OK
mmc0(part 0) is current device
=> mmc partconf 0 1 1 1
=> mmc bootbus 0 2 0 0
Set to BOOT_BUS_WIDTH = 0x2, RESET = 0x0, BOOT_MODE = 0x0
=> reset
resetting ...

U-Boot SPL 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')
EEPROM not available at 0x48, trying to read at 0x49
Reading on-board EEPROM at 0x49 failed -121
SPL initial stack usage: 13392 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed
Loading Environment from MMC... *** Warning - No MMC card found, using default environment

Authentication passed
Authentication passed
Starting ATF on ARM64 core...

What's the reason of using the "reset" command?

This would just resets the SoC to boot from the same bootmode it was initially configured to boot from. You would need to change the bootmode pins to eMMC alternate bootmode.

Hello Prashant,

I tried to configure and changed pins without resetting the board from uboot, still it is not booting .

Below is log of the uboot .

U-Boot SPL 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)
SYSFW ABI: 4.0 (firmware rev 0x000a '10.1.8--v10.01.08 (Fiery Fox)')
EEPROM not available at 0x56, trying to read at 0x57
Reading on-board EEPROM at 0x57 failed -1
Trying to boot from MMC2
Authentication passed
Authentication passed


U-Boot 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)

SoC:   AM64X SR2.0 HS-FS
Model: Texas Instruments AM642 EVM
EEPROM not available at 0x56, trying to read at 0x57
Reading on-board EEPROM at 0x57 failed -1
DRAM:  1 GiB
Core:  70 devices, 29 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from FAT... Unable to read "uboot.env" from mmc0:1...
In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
EEPROM not available at 0x56, trying to read at 0x57
Reading on-board EEPROM at 0x57 failed -1
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  0
=>
=>
=>
=>
=> mmc dev 0
switch to partitions #0, OK
mmc0(part 0) is current device
=> mmc partconf 0 1 1 1
=> mmc bootbus 0 2 0 0
Set to BOOT_BUS_WIDTH = 0x2, RESET = 0x0, BOOT_MODE = 0x0
=>
U-Boot SPL 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)
Resetting on cold boot to workaround ErrataID:i2331
Please resend tiboot3.bin in case of UART/DFU boot
resetting ...

U-Boot SPL 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)
Resetting on cold boot to workaround ErrataID:i2331
Please resend tiboot3.bin in case of UART/DFU boot
resetting ...

Please let me know the possible issue.

Nayana Nagaraj said:

Please let me know the possible issue.

Please enable the eMMC RST pin following the below FAQ:

e2e.ti.com/.../faq-am62x-how-to-check-and-configure-emmc-flash-rst_n-signal-to-support-warm_reset-from-emmc-booting-on-am62x-sk-e2

Hello Prashant, 

Thanks for the information.
The above procedure worked for one of the board, but in the other board it is not working even the ROM boot code is not printing

U-Boot SPL 2024.04-ti-g29d0c23d67ee (Nov 29 2024 - 11:41:54 +0000)
Resetting on cold boot to workaround ErrataID:i2331
Please resend tiboot3.bin in case of UART/DFU boot
resetting ...

Hello,

Nayana Nagaraj said:

The above procedure worked for one of the board, but in the other board

Are these custom boards?

Did you follow all the steps in the same way from the working setup to the non working setup?

Thanks!