Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

09/04/2013

MK 03:23 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Tim,
No worries! I appreciate you getting the 512MB to work!
I downloaded from three different places on the CL website, this thread, the u-boot wiki page, and the link you posted. All three binaries were the same - no joy.
Mike Michael Karasoff

TI 03:15 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Mike
Sorry about that!
I did add a board type for this configuration, but didn't really document it very well. :(
Use the mityarm335x_4kpage configuration to define the MITYARM_4K_PAGE_NAND preprocessor macro.
The goal is eventuall... Tim Iskander

MK 02:39 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Jonathan,
I found the problem - looks like a bug in your u-boot code. For some reason, the MITYARM_4K_PAGE_NAND environment variable was not getting set. To the top of include/configs/mityarm335x.h I added:
@#define MITYARM_4K_PA... Michael Karasoff

JC 02:21 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Jumpers only affect where the board looks for bootup code. The ubifs wiki page has my jumper config for booting from nand vs sd card. Jonathan Cormier

JC 02:19 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Mike can you run "nand bad"?
Did you use an older u-boot before you got the updated one? Its possible the older u-boot already marked all the blocks bad. To clear the bad blocks you need to run "nand scrub.chip". This command will w... Jonathan Cormier

MK 02:05 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Jonathan,
Thanks. Yes, my suspicion is that I don't have the correct u-boot. I've built u-boot from source, the u-boot-2013.01 branch, and still not working. The results (and the uboot version - 2013.01.01-g6818f7c) are identical t... Michael Karasoff

JC 09:13 AM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

Mike,
I've added the correct mtdparts and other information on flashing the nand in the following wiki: http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/UBIFS_Nand_Boot.
h3. U-boot
Though it sounds like you ... Jonathan Cormier

09/03/2013

MK 09:17 PM Software Development: RE: Difficulty in flashing MLO and U-Boot to the AM3354 with 512MB NAND

I am still having trouble programming the MLO and uboot into NAND from u-boot on an AM3354.
I've tried the MLO, uEnv.txt, and uboot.img posted for the 512M device, and here is what a boot into uboot from an SD Card looks like:
@U-B... Michael Karasoff

08/19/2013

JC 02:19 PM Software Development: RE: NAND memory map question

Thanks for the status update. Let us know how it turns out.
-Jonathan Jonathan Cormier

09:17 AM Software Development: RE: NAND memory map question

Jonathan,
Thanks much as your last two posts help tremendously. Our biggest concern with using NAND for both the u-boot images
(and our own) was having a block go bad. We did not want our units to end up dying in the field bec... Anonymous

08/16/2013

JC 01:29 PM Software Development: RE: NAND memory map question

So looking in the following file you can see that there is support in the MLO for having a redundant environment partition, although we don't use it. It would probably not be difficult for someone to also add a redundant u-boot partitio... Jonathan Cormier

JC 01:08 PM Software Development: RE: NAND memory map question

John,
Thanks for the clarification, I was looking in the kernel repository not the U-boot one.
I am not too familiar with the u-boot mlo implementation. I'm not sure what it would take to have the MLO support two locations for the... Jonathan Cormier

11:53 AM Software Development: RE: NAND memory map question

Hi Jonathan,
Here is the wiki for the AM335x Uboot users guide:
http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#SPI_2
The mityarm335x.h is from the latest git repo as described on your wiki:
http://supp... Anonymous

JC 11:15 AM Software Development: RE: NAND memory map question

You can read up on the TI processor ROM boot process in section 26 of the AM335x Technical Reference Manual. http://www.ti.com/lsds/ti/arm/sitara_arm_cortex_a_processor/sitara_arm_cortex_a8/am335x_arm_cortex_a8/tech_docs.page?rootFamily... Jonathan Cormier

JC 11:10 AM Software Development: RE: NAND memory map question

Could you please provide a reference to these TI wiki pages?
What git repo did you locate the referenced mityarm335x.h file?
Does this wiki page help? http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/UBIFS_Nand... Jonathan Cormier

08/15/2013

04:48 PM Software Development: NAND memory map question

Hi,
We are currently running the AM3352 cpu module and was hoping for some clarification on where everything sits in
NAND as certain comments in files don't seem to line up with TI's wiki pages or the mityarm335x.h file
in /inc... Anonymous