Dear all,
I am still struggling with this problem, but getting to reproduce this problem repeatably. Hoping folks in the forum can give me some pointers. Our Atmel FAE is clueless also.
This is repeatable, on two boards (both 9260 Rev A and Rev B): - bootstrap, u-boot, kernel, RFS all downloaded to NAND with SAM-BA 2.6 - Without recycle power, just push reset button; u-boot will come up. And I can continue to boot Kernel (2.6.25) - Push reset second time(and subsequent times), bootstrap will run and fail in the first few instruction of u-boot - Sometimes power cycle, u-boot will come up again
- When it runs, if I has u-boot boot kernel, linux will run. - Push reset button in Linux board will reboot and u-boot will run again (all the times) - If I use linux reboot, the board will stop after running bootstrap and (I believe) branched to u-boot.
Our h/ware guy has checked all the timing NAND, SDRAM etc and we have experimented with all the settings.
Thanks in advance for your help, Norman
Norman Cheung wrote:
Many thanks Stelian for the replies. My comments inline.
Norman
Stelian Pop wrote:
Le mercredi 25 juin 2008 à 01:36 +0000, Norman Cheung a écrit :
I am struggling with this problem for a week now and not making any progress. So any suggestions, ideas or pointer will be greatly appreciated.
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Since the post earlier, I have narrowed the problem to the bootstrap during the copy from NAND to SDRAM, memories are corrupted. I think I have a marginal NAND chip. I played around the SMC cycle timing in bootstrap, I have a setting that I can boot u-boot with power cycle 6 out of 10 times. So I am convinced that it is not an u-boot issue, Thanks!
The board works with u-boot 1.3.2 and at91bootstrap(1.5 I only have the binary) booting from NAND.
The source (for the latest version) is freely available on the Atmel site: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4093
If you really need the source for an older version, I'm sure the Atmel support will send it to you upon request.
U-boot fails intermittently at the start. When it fails, it didn't make it to my first printf statement. When I use JTAG to debug it, it always works. If the board has been let without power for 1+ hour, it will also boot up when I apply power to it(something to do with the battery perhaps).
Did you try disconnecting the battery ? Or replacing the battery with a new one ?
[...]
I tried disconnecting the battery and with the new SMC timing changes, I can boot up only one time after disconnecting the battery. I will go and get a new battery.
We had at91bootstrap 1.5 working well in 32-bit mode with u-boot 1.3.2. But I don't have the source.
See above.
I wonder what is the current stable version of u-boot and at91bootstrap?
AT91Bootstrap seems to be at v1.9.
As for U-Boot, try the latest git (which will soon be u-boot v1.3.4).
(BTW, if Wolfgang is listening, it would be nice to have proper tags in git as well as releases on the ftp server for the -pre version. Since the merge window is closed, I guess we're up to v1.3.4-pre1 now, but this version tag cannot be found anywhere...)
Stelian.