UBI support

[Eric Bénard]

Hi Sascha, Hi Baruch,

Le 16/07/2010 09:27, Sascha Hauer a écrit :
>> On Mon, Jul 05, 2010 at 03:16:23PM +0200, Sascha Hauer wrote:
>>> The following series prepares and implements UBI for barebox. Here is a log
>>> while playing with UBI:
>>
>> I've tested this on our i.MX25 board. Here's what I get:
>>
>> barebox:/ ubiattach /dev/nand0.rootfs
>> UBI: attaching mtd0 to ubi0
>> UBI: physical eraseblock size:   131072 bytes (128 KiB)
>> UBI: logical eraseblock size:    129024 bytes
>> UBI: smallest flash I/O unit:    2048
>> UBI: sub-page size:              512
>> UBI: VID header offset:          512 (aligned 512)
>> UBI: data offset:                2048
>> UBI: empty MTD device detected
>> UBI: create volume table (copy #1)
>> UBI error: ubi_scan_get_free_peb: no eraseblocks found
>> failed to attach: error 28
>
> I just tested it on an i.MX35 board which should have the same Nand
> Controller as the i.MX25. I have never seen Nand devices with a subpage
> size smaller than the I/O unit size (sub-page size: 512), so I would
> start looking there.

I have exactly the same log under linux here on an i.MX35 & i.MX25, 
using 2k Micron Nand :

on i.MX35 :
[    1.060000] UBI: attaching mtd3 to ubi0
[    1.070000] UBI: physical eraseblock size:   131072 bytes (128 KiB)
[    1.070000] UBI: logical eraseblock size:    129024 bytes
[    1.080000] UBI: smallest flash I/O unit:    2048
[    1.080000] UBI: sub-page size:              512
[    1.090000] UBI: VID header offset:          512 (aligned 512)
[    1.090000] UBI: data offset:                2048
[    1.420000] UBI: attached mtd3 to ubi0

on i.MX25 :
[    0.840000] UBI: attaching mtd3 to ubi0
[    0.840000] UBI: physical eraseblock size:   131072 bytes (128 KiB)
[    0.850000] UBI: logical eraseblock size:    129024 bytes
[    0.860000] UBI: smallest flash I/O unit:    2048
[    0.860000] UBI: sub-page size:              512
[    0.860000] UBI: VID header offset:          512 (aligned 512)
[    0.870000] UBI: data offset:                2048
[    1.460000] UBI: attached mtd3 to ubi0

Eric