imx6ULL EVK flash memory settings

[SCordibella]

Dear community, I solder a NAND flash module on the imx6ull EVK.

The flash module is the MT29F4G08ABADAWP (the 4Gb IT) from MICRON, I attach the data sheet.

After solder the module we use the mfgtools2, but unfortunately I am unable to see the module and there is no way to interact with it. Of course I try with the u-boot with NAND support, but the NAND field report 0MB and no one operation like "nand info" are working on my side.

I found a document that explain how to setup some resistors on CU module to enable the NAND flash, you can see this document at page 9 of the attached pdf file.

My thoughts are to set the BOOT_CFG1 in this way:

bit set
0 1
1 0
2 0
3 0
4 1
5 0
6 0
7 1
and to set BOOT_CFG2 in this way:
bit set
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 1

I have no concern about BOOT_CFG4, because I don't clearly understand how it works and how it could help to setup the NAND communication.

Can anyone confirm my setup for BOOT_CFG1, BOOT_CFG2 and BOOT_CFG4?

Is this the reason that I am unable to see the NAND flash from u-boot?

Any help will be appreciated,

Stefano.

[igorpadykov]

Hi Stefano

for using NAND with i.MX6ULL EVK one can follow i.MX 6ULL EVK Board Hardware User's Guide,

remove the QSPI Nor flash device.

https://www.nxp.com/docs/en/user-guide/IMX6ULLEVKHUG.pdf 

One can try to boot from SD1 and test NAND interface, checking signals with oscilloscope

(BOOT_CFG are not used in that case).

Best regards
igor
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[SCordibella]

Hi Igor, yes, we remove the NOR flash and we follow the instructions. Now we are able to boot from SD card, but I don't understand what you mean when you say checking signal with oscilloscope. Can you give me an example?

Thank you for your time,

Stefano.

[igorpadykov]

Hi Stefano

one can check #ifdef CONFIG_SYS_USE_NAND  in uboot/include/configs/mx6ullevk.h :

uboot-imx.git - Freescale i.MX u-boot Tree 

if you unable to see the NAND flash from u-boot then there may be errors

in connection and one can start to debug it with oscilloscope.

Best regards
igor