U-boot spl problem on AM335x custom board.

Dmitriy Alekseev

Hello.
I'm trying to run u-boot on my custom board, made on am3359zcz. U-boot version 2011.09 from sdk. SPL loads to internal RAM and fails.
The scheme was designed based on components, using in evm. Memory, nand, power management - the same.
Only difference is haven't i2c eeprom with board info. In u-boot code I commented out lines which read eeprom and substituted header structure with evm general purpose board data.

Boot sequence: NAND, NANDI2C, MMC0, UART0
I haven't flash it and run from nand yet, but SPL fails while trying to load u-boot in all ways I tried:
1) At the UART boot it sends CCC.., but not be able to receive u-boot.img via ymodem
2) When mmc0 card is present it loads SPL (MLO) by internal IPL, but then fails messaging "spl: fat register err: -1".

Could someone give an advice? Thanks.
May be some errata on this issue, which I don't know?

Best Regards,
Dmitriy Alekseev

over 12 years ago

0 Schuyler Patton over 12 years ago

TI__Mastermind 40180 points

When downloading over serial you must use u-boot-spl.bin. There is a header I believe that is used xmodem to know how big the file is.

0 Dmitriy Alekseev over 12 years ago in reply to Schuyler Patton

Prodigy 120 points

Thanks Schuyler. Of course I downloaded u-boot-spl.bin as specified in AM335x_U-Boot_User's_Guide.

0 Tao Qi over 12 years ago

Prodigy 80 points

boot sequence Why do you boot from nand first?

0 Dmitriy Alekseev over 12 years ago in reply to Tao Qi

Prodigy 120 points

Because we planned to use NAND as main storage memory.

We had an error in SDRAM schematic design. After soldering correction the board is booting, but kernel crashing during boot. Bootlogs attached in file.

My board's collection of kernel Ooopses:

Internal error: Oops - undefined instruction: 0 [#4]

Unable to handle kernel paging request at virtual address fffffc66

Unable to handle kernel NULL pointer dereference at virtual address 0000008c

The error is a kind of memory troubles. The board beaglebone runs fine with this SD card.
What could be the most likely cause of this: poor quality memory connection or kernel porting issues?

Thank You again.
Best Regards,
Dmitriy

0 JJD over 12 years ago in reply to Dmitriy Alekseev

TI__Guru* 87240 points

Dmitriy, for custom boards, you need to ensure your DDR configuration is correct. Please check this wiki for more information: http://processors.wiki.ti.com/index.php/AM335x_EMIF_Configuration_tips

Regards,

james

0 Dmitriy Alekseev over 12 years ago in reply to JJD

Prodigy 120 points

Thanks, James.
I checked with that paper. But since we use MT47H128M16RT-25E:C I decided to leave the default settings for memory.

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U-boot spl problem on AM335x custom board.