AM1808 Linux NAND support

Brad Du

Prodigy 10 points

Other Parts Discussed in Thread: AM1808

Hi,

It seems that I could not access NAND in Linux. Here is what I did on the ZOOM 1808 Dev Kit:

- program boot image to NAND using CCS and it could boot from NAND now

- Rebuild Linux kernel to enable NAND under MTD (not enabled by default) based on this instruction:

http://processors.wiki.ti.com/index.php/GSG:_Building_Software_Components_for_OMAP-L1#Driver_configuration_in_the_Linux_kernel

- Boot up the Linux but it could not see the Linux partition, nothing at proc/mtd and no /dev/mtd* (I disabled SPI flash when rebuilding the kernel on purpose and I saw SPI flash partitions before the kernel change)

Am I missing something? How do I know if NAND is detected successfully besides checking /proc/mtd or /dev/mtd?

Thanks,

Brad

over 15 years ago

0 Sudhakar Rajashekhara over 15 years ago

TI__Expert 5170 points

Hi Brad,

You have to disable MMC for NAND to work.

Regards, Sudhakar

PS: Please mark this post as answered via the Verify Answer button below if you think it answers your question. Thanks!

0 Gerry Lee over 14 years ago in reply to Sudhakar Rajashekhara

Intellectual 315 points

Sudhakar said:

Hi Brad,

You have to disable MMC for NAND to work.

Regards, Sudhakar

PS: Please mark this post as answered via the Verify Answer button below if you think it answers your question. Thanks!

Hi Sudhakar ,

would explain why we should disables MMC?

0 Sudhakar Rajashekhara over 14 years ago in reply to Gerry Lee

TI__Expert 5170 points

Hi Gerry,

Both NAND and MMC/SD cannot work together as the pins are multiplexed.

Thanks, Sudhakar

0 lofna kumari over 12 years ago in reply to Sudhakar Rajashekhara

Expert 2785 points

Hi all,

At present I am using SPI flash for booting my UBL(arm-spi-ais.bin) & UBOOT(u-boot.bin). And running my kernel uImage & rootfs from my SD-CARD.

Now I have interfaced NAND flash to my AM1808. How to flash flash my Kernel Image & rootfs to NAND flash, how that is working

And my sdcard card can detect as some another external storage files. Any bootloader modifications, It seems in my bootloader

there is no supported NAND write & erase calls.

Please help me

Thanks,

Lofna

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AM1808 Linux NAND support