Re: [U-Boot] [U-boot] Is there generic code to detect nand chip's ecc bits?

On Thu, 2014-04-17 at 18:19 +0800, TigerLiu@via-alliance.com wrote:

Hi, Scott:

I have a question about nand chip’s ecc bits:

Nand chip usually declared its ecc bits for each 512 bytes in its data sheet.

Such as:

Some nand chips required 4bit ECC for each 512 bytes.

Some nand chips required 2bit ECC for each 512 bytes.

So, my question is:

Could ecc bits be got from nand chip’s flash id?

Or other generic method to retrieve ECC bits required for every nand chip?

I believe the ONFI data has this information. For chips/controllers that don't support ONFI, you'd have to deal with vendor specific extended ID encoding (if the information is there at all).

-Scott