Re: No more software ECC in omap2.c NAND driver. Why?

[Grant Erickson <marathon96@gmail.com>]

On 11/21/10 11:29 PM, Ghorai, Sukumar wrote:
>> The board (Mistral AM37x) NAND (Micron 256 MiB) was originally
>> bootstrapped
>> over SD/MMC from u-boot using the following script:
>
> [Ghorai] let me know the nand details - x8/x16, small/big page?

It's the Micron 256 MiB x16 2 KiB page size, 128 KiB erase block size device
on the Mistral AM37x board.

>>     fatload mmc 0 ${loadaddr} root.jff
>
> [Ghorai] How you create the root.jff
> mkfs.jffs2 --output=root.jffs2 --root=.. --pagesize=?? --eraseblock=?? -n

% mkfs.jffs2 --little-endian --no-cleanmarkers --pad 2048 --pagesize 2048
--eraseblock 131072 -d /tmp/tmp.h9dKGpcNFw -D root.devices -o root.jffs2

>>     nand write.i ${loadaddr} 0x00c00000 0x2000000
>>     nand write.i ${loadaddr} 0x04200000 0x2000000
>
> [Ghorai] why you writing in two places?

Redundant images.

>> Following that, the board is updated, from Linux, using 'flash_eraseall -
>> q'
>> and 'nandwrite -p -q' on all partitions, except that containing MLO.
> [Ghorai] 
>
> 1. can you send the exact comment you used to write in nand? Which partition?

    flash_eraseall -q /dev/mtd7
    nandwrite -p -q /dev/mtd7 root.jffs2
    flash_eraseal -q /dev/mtd9
    nandwrite -p -q /dev/mtd9 root.jffs2

> 2. What is the last kernel you used and was working perfectly?

v2.6.32_OMAPPSP_03.00.01.06.patch1

Best,

Grant