lkml.org 
[lkml]   [2010]   [May]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCHv2 1/2] mtd: nand: Extend NAND flash detection to new MLC chips
Hi,

Kevin Cernekee a écrit :
> Some of the newer MLC devices have a 6-byte ID sequence in which
> several field definitions differ from older chips in a manner that is
> not backward compatible. For instance:
>
Doesn't these nand support ONFI "Read Parameter Page" (cmd 0xec) ?
If yes it will be a more generic way to detect new nand features.


Matthieu




> Samsung K9GAG08U0M (5-byte sequence): ec d5 14 b6 74
> 4th byte, bits 1:0 encode the page size: 0=1KiB, 1=2KiB, 2=4KiB, 3=8KiB
> 4th byte, bits 5:4 encode the block size: 0=64KiB, 1=128KiB, ...
> 4th byte, bit 6 encodes the OOB size: 0=8B/512B, 1=16B/512B
>
> Samsung K9GAG08U0D (6-byte sequence): ec d5 94 29 34 41
> 4th byte, bits 1:0 encode the page size: 0=2KiB, 1=4KiB, 3=8KiB, 4=rsvd
> 4th byte, bits 7;5:4 encode the block size: 0=128KiB, 1=256KiB, ...
> 4th byte, bits 6;3:2 encode the OOB size: 1=128B/page, 2=218B/page
>
> This patch uses the new 6-byte scheme if the following conditions are
> all true:
>
> 1) The ID code wraps around after exactly 6 bytes
>
> 2) Manufacturer is Samsung
>
> 3) 6th byte is zero
>
> The patch also extends the maximum OOB size from 128B to 256B.
>


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-05-05 09:47    [W:0.070 / U:25.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site