write linux to NAND via u-boot on i.mx6

[andreykononov]

I may be blind, but I can't find info how to manual write firmware (u-boot, kernel, rootfs ... other) to Nand flash through u-boot

now i'm using prebuild versions from L3.14.52_1.1.0-ga_images_MX6QDLSOLO

[andreykononov]

strange situation.I am trying flash dfb from u-boot loaded from SD

=> mmc rescan

=> fatload mmc 1 0x12000000 imx6q-sabreauto-gpmi-weim.dtb

reading imx6q-sabreauto-gpmi-weim.dtb

45007 bytes read in 59 ms (744.1 KiB/s)

=> nand erase 0x5000000 0x100000

NAND erase: device 0 offset 0x5000000, size 0x100000

Erasing at 0x5080000 -- 100% complete.

OK

=> nand write.i 0x12000000 0x5000000 0x100000

NAND write: device 0 offset 0x5000000, size 0x100000

1048576 bytes written: OK

=> nand dump 0x5000000               

Page 05000000 dump:

        00 ff ff ff ff ff ff ff  ff ff d0 0d fe ed 00 00

        af cf 00 00 00 38 00 00  a5 50 00 00 00 28 00 00

...............................................

but real data start from "d0 0d fe ed 00 00"

why I see this offset "00 ff ff ff ff ff ff ff  ff ff"

[art]

Unfortunately, there seems to be no way of doing that. Only the cases, described in the Section 4.4 of attached document, are possible.

Have a great day,
Artur

[andreykononov]

something like this

U-boot flashing

mmc init

fatload mmc 0 0x81600000 u-boot.bin

nand erase 0x80000 0x100000

nandecc sw

nand write.i 0x81600000 0x80000 0x100000

Kernel flashing

mmc init

fatload mmc 0 0x81600000 uImage

nand erase 280000 200000

nandecc sw

nand write.i 0x81600000 280000 200000

[andreykononov]

Very strange, when I worked with TI AM3517, u-boot has been able to record NAND, and if you know address for writing, you can flash u-boot/x-load/kernel/rootfs and everything works good

[daiane_angolini]

take a look if this is what you've looking for. The pdf file is i.MX_Linux_User's_Guide.pdf and it's under the Doc Bundle, in this case it's for fsl-yocto-3.14.38_6ul-ga.

I prefer you download the doc from the same version you're using, and from website.

[daiane_angolini]

I'm sorry, just realized I got confused with another question I'm working with. You are targeting NAND
(not eMMC). I was not able to find an explicit how-to NAND (as we have for eMMC), but all the information needed (map) is in the same document.