DM385 + IPNC RDK3.5 + U-boot 2010 -> how to flash nand from uboot?

Hi Ganesh,

Do you finally fix your NAND detect issue from the below e2e thread?
e2e.ti.com/.../534173

Regarding flashing linux kernel uImage from SD u-boot, see the below pointer:

processors.wiki.ti.com/.../TI81XX_PSP_UBOOT_User_Guide

In your case you should use SD command (not TFTP) to copy uImage from SD card to memory.

TI81XX_EVM# mmc rescan 0
TI81XX_EVM# mw.b 0x81000000 0xFF 0x20000
TI81XX_EVM# fatload mmc 0 0x81000000 uImage

See also if the below pointers will be in help:

www.ti.com/.../sprui83.pdf
e2e.ti.com/.../1169674

Regards,
Pavel

Hi Pavel Botev ,

Yes we have fixed the NAND flash issue today only. software side we have to change some register.

pavel we have faced some minor issue i need some clarification.

we got some error:
DM385_IPNC#mmc rescan 0
DM385_IPNC#mw.b 0x81000000 0xFF 0x20000
DM385_IPNC#fatload mmc 0 0x81000000 u-boot.min.nand
reading u-boot.min.nand

108192 bytes read
DM385_IPNC#nand erase 0x0 0x20000

NAND erase: device 0 offset 0x0, size 0x20000
Skipping bad block at 0x00000000

OK
DM385_IPNC#nand write.i 0x81000000 0x0 0x20000

NAND write: device 0 offset 0x0, size 0x20000
Skip bad block 0x00000000
Skip bad block 0x00020000
....
Skip bad block 0x07fa0000
Skip bad block 0x07fc0000
Skip bad block 0x07fe0000
NAND write to offset 8000000 failed -22
0 bytes written: ERROR


any help how to avoid these. actually nand flash has some images which i need to erase and overwrite my new binaries.

nand erase chip failed

Skip bad block 0x07fc0000
Skip bad block 0x07fe0000
NAND write to offset 8000000 failed -22
 0 bytes written: ERROR

One clarification: Is it possible to flash nand many times? Because if nand is flashed first time we will not face any issue but if we try to flash new binaries i'm getting above errors.

regards,
Ganesh

Ganesh,

The u-boot.min.nand should be written in the range from 0x00000000 to 0x0001FFFF (~130K), and your u-boot.min.nand is ~0.1K (108192). But you have so many bad blocks that it overlaps to the rest of the NAND layout regions:

processors.wiki.ti.com/.../TI81XX_PSP_UBOOT_User_Guide

Is this new NAND or it was already used? The NAND chip can be re-flashed many times, but it has write/erase cycles limit and can be wear out. The number of these cycles are documented in the NAND chip datasheet. For example, the MT29F2G16AAD chip has "Endurance: 100,000 PROGRAM/ERASE cycles"

To view the list of bad blocks:
TI81XX_EVM# nand bad

If multiple continuous bad blocks are reported on the NAND flash in the Uboot, run the 'nand scrub' command once. Some good blocks are incorrectly marked bad in this case. Running the 'nand scrub' command once fixes this issue.

See also if the below e2e threads will be in help:

e2e.ti.com/.../236820
e2e.ti.com/.../368352

Regards,
Pavel

HI Pavel,

DM385_IPNC#nand scrub

NAND scrub: device 0 whole chip
Warning: scrub option will erase all factory set bad blocks!
There is no reliable way to recover them.
Use this command only for testing purposes if you
are sure of what you are doing!

Really scrub this NAND flash? <y/N>
Erasing at 0x1ae0000 -- 21% complete.
nand0: MTD Erase failure: -5
Erasing at 0x7fe0000 -- 100% complete.
OK
DM385_IPNC#mmc rescan 0
DM385_IPNC#mw.b 0x81000000 0xFF 0x20000
DM385_IPNC#fatload mmc 0 0x81000000 u-boot.min.nand
reading u-boot.min.nand

108192 bytes read
DM385_IPNC#nand erase 0x0 0x20000

NAND erase: device 0 offset 0x0, size 0x20000
Skipping bad block at 0x00000000

OK
DM385_IPNC#nand write.i 0x81000000 0x0 0x20000

NAND write: device 0 offset 0x0, size 0x20000
Skip bad block 0x00000000
Skip bad block 0x00020000


It's a new spansion flash pavel. so only one time we flashed.

EDIT:

Pavel i have solved the issue. it was timing issue. One more help i need can you just help in programming my NAND like at what address range i should maintained for u-boot.min.nand, u-boot.bin, uImage & (How to create filesystem first link only tell what utility you need but not clearly how to create .img from filesystem). One little help more: About bootargs from uboot in NAND flash.

regards,
Ganesh