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

06/27/2014

JC 08:26 PM Software Development: RE: SPI clock issues with using newest u-boot

It's possible or even probable that name of the pound defines changed in this version. You can check the Readme to see if they are listed otherwise might need to grep for them.
Also take notice that at the end of the config there is ... Jonathan Cormier

04:41 PM Software Development: RE: SPI clock issues with using newest u-boot

Hey Jonathan,
Do I only need the "#define CONFIG_SPI"? I've tried that along with (from the original mityarm35x.h)
the following no luck:
/* SPI support */
#ifdef CONFIG_SPI
#define BOARD_LATE_INIT
#define CONFIG_OMAP3_SPI
... Anonymous

JC 04:29 PM Software Development: RE: SPI clock issues with using newest u-boot

It does look like SPI was not enabled in the new u-boot config. Checkout the differences in include/configs/mityarm35x.h between the new and old. This was done since u-boot doesn't need access to any spi devices so we left it up to lin... Jonathan Cormier

02:36 PM Software Development: SPI clock issues with using newest u-boot

After moving to the newest u-boot we are having issues running SPI bus. Accessing the McSPI registers (0x481A0000) causes a data
abort. This suggests that the clocking is no longer set up correctly and that we have a dependency on u-boo... Anonymous

06/25/2014

JC 05:09 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Dirty gets appended to the version string for both u-boot and the kernel when you compile source code that has changes that aren't committed in git. Its a sort of warning to the developer that this version may not be reproducible from a... Jonathan Cormier

05:05 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

I pulled the AM335XPSP_04.06.00.08 tag and there were a lot of differences. I don't think it matters
that much as we really only modify six files of yours, and most of that is because of the one very
large SPI NOR chip that we need. I'... Anonymous

JC 04:58 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Looks like both the 03 and 08 branches have the same 2011.09 date so harder to determine which branch of code you were using. Jonathan Cormier

JC 04:55 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

You were likely using the code from the AM335XPSP_04.06.00.08 branch before and now should be using the u-boot-2013.10 branch. There may be alot of changes between the two branches. Jonathan Cormier

02:05 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Can you tell me if I were to pull a full u-boot "tree" from your "u-boot-mityarm-335x.git/tree", which one of
the head labels should I use? u-boot-2013.10, AM335XPSP_04.06.00.03 or AM335XPSP_04.06.00.08 ?
I'll... Anonymous

12:18 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Seems like when I used our NAND mlo/u-boot burn in scripts, I blasted over the old u-boot by erasing NAND from 0 to 0x1E0000.
Sorry for the distraction. Anonymous

12:11 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Not sure what happened, but even placing the original MLO back it will not boot:
U-Boot SPL 21401-101.01.00.02-dirty (Nov 06 2013 - 08:59:11)
Texas Instruments Revision detection unimplemented
MityARM335x profile 1 - Model No: 3352... Anonymous

12:02 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Booting from the mmc card now does not show that u-boot in NAND has any issues.
U-Boot# nand read 8d000000 80000 1e0000
NAND read: device 0 offset 0x80000, size 0x1e0000
1966080 bytes read: OK
U-Boot# Anonymous

JC 11:56 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Yes we decided to store everything in nand using the correct ecc so we disabled the nandecc command. So you do not need to change ecc modes anymore in u-boot.
Odd I wasn't aware of any compatibility problems with loading the old u-bo... Jonathan Cormier

11:43 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Looks like we can't reach u-boot with the new MLO. We see the following and then it stops. If we plug in the
mmc, we are back. Any suggestions?
John C.
U-Boot SPL 2013.10-gd35e056 (Jun 03 2014 - 17:00:30)
MitySOM335x profile 1 -... Anonymous

11:34 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Thanks Jonathan,
It seems the u-boot nandecc command has changed. We used to run the following script for
burning all four MLO locations. When we ran the "nandecc hw 2" command it used to come back
with a "HW ECC BCH8 Selected" r... Anonymous

JC 11:17 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Okay. I created a FAQ about this issue incase anyone else runs into it.
https://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Software_FAQs#U-boot-has-started-hanging-on-startup-while-booting-from-nand-or-is-behaving-... Jonathan Cormier

11:13 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Yes there is indeed an error. I'll try the newer MLO to see how that works.
Thanks,
John C.
U-Boot# nand read 8d000000 0 80000
NAND read: device 0 offset 0x0, size 0x80000
524288 bytes read: OK
U-Boot#... Anonymous

JC 10:18 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

If you confirm there are bit flips you can then flash just the UBL into the NAND and see if it boots fine. You'll see something like the following during boot to show that its correcting the bit flips. Jonathan Cormier

JC 10:13 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Try doing to following. It should print out bitflips if it finds them. Jonathan Cormier

09:53 AM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
I don't have access to a booted Linux, only u-boot. I created a text script that runs the u-boot "nand dump <address>" from address 80000h to F0000h in increments of 800h = 2048 (page size.) The output is raw (see inc... Anonymous

06/24/2014

JC 05:19 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

That is what I'm suggesting. You can verify if this is the issue by running the 'nand dump' or 'nand read' command and looking for any reported fixed bitflips.
Note you can try this from linux as well. The -n option should allow you... Jonathan Cormier

05:07 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

So let me try and clarify the issue. We have been running our u-boot for about 10 months with no issues. Are you suggesting that a bit has gone bad and because the older MLO did not set ecc correctly, we are now seeing this strang behavi... Anonymous

JC 04:56 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Those ecc errors are coming from reading the environment from nand. If I remember correctly the older u-boot saved the environment using a 1 bit ecc (hamming) instead of 8 bit ecc (bch-8) which the new u-boot uses for everything. You ca... Jonathan Cormier

JC 04:49 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

No nevermind, thats not correct. You do have a 256MB nand module. So the first u-boot should be correct. Jonathan Cormier

JC 04:47 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

U-Boot mainline:
origin/u-boot-2013.10: d35e05656457c2d3715de8c3eb7c777375c160ae
u-boot config: mityarm335x_4kpage_config Jonathan Cormier

JC 04:46 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Woops hangon didn't notice that you had a 3352 module. They have a larger nand and require a special u-boot build. Jonathan Cormier

04:40 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Hey Jonathan,
Something is very unhappy. Here is the boot:
CCCCCCCC
U-Boot SPL 2013.10-gd35e056 (Jun 03 2014 - 17:00:30)
MitySOM335x profile 1 - Model No: 3352-GX-X27-RC Serial No: 134253
Configuring for 256 MB DDR3 @ 400MHz
C... Anonymous

JC 04:28 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

There was a bug with the older u-boot where ecc was not enabled when the UBL loaded the u-boot image. This meant that bitflips could cause weird error messages. Seeing as you don't have any problems when the u-boot is loaded from mmc, ... Jonathan Cormier

04:22 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

Here is the boot sequence:
----------------------------------------------------------------
U-Boot# CCCCCCCC
U-Boot SPL 21401-101.01.00.02-dirty (Nov 06 2013 - 08:59:11)
Texas Instruments Revision detection unimplemented
MityARM335x... Anonymous

JC 04:14 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

John,
What version of U-boot are you using? If you can include the full bootlog that would be helpful. Jonathan Cormier

03:59 PM Software Development: RE: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

As added information, the mtest command works.
Commands that *do* work:
mtest 402fffe0 402ffffe A5A500FF
mtest 80000000 8d000000 A5A500FF
Commands that *don't* work:
mw.b 8d000000 A
mw.b 402fffe0 A
mw.w 402fffe0 A
mw.l 402fff... Anonymous

03:24 PM Software Development: MityARM335x profile 1 - Model No: 3352-GX-X27-RC failing memory writes in u-boot

We just received one of our units back from the field and it hangs running a "mw.b" command in the u-boot param script. The system will lock up using DDR or internal ARM memory addresses in the mw.b command. If we boot off the mmc sd car... Anonymous