Finding ERASE_INFO from a Flash datasheet

[Florian Fainelli]

Hello Glenn,

Thank you very much for those informations. I think I had a try at putting 8 
erase regions of 4k but I did not change the erase command. Also, I am not 
sure linux-2.6 accepts 8 ERASEINFO, last I tried it generated a warning.

Anyway, if you can send me patch I could have a try and resend an updated 
version to linux-mtd.

Thanks.

Le lundi 30 avril 2007, Glenn Henshaw a écrit :
> On 28-Apr-07, at 7:24 AM, Florian Fainelli wrote:
> > Hello all,
> >
> > I am using a box which has a SST 39VF6402B flash [1] driven by
> > jedec. This
> > flash is not yet referenced in the Linux kernel, and once I got the
> > right
> > erase informations, I will submit a patch to add it.
> >
> > For the moment, I have defined 4 strictly identical erase
> > informations :
> > ERASE_INFO(0x2000, 256), which makes me avoid this message "Sum of
> > regions
> > (400000) != total size of set of interleaved chips (800000)". I am
> > pretty
> > sure these informations are completely wrong.
>
>    I'm using 6401B devices, but configured for both. I have 8 regions
> configured as ERASE_INFO(0x1000, 256).
>
>    It should be noted that the SST part has two erase modes: 4k and
> 64k blocks. If you want to use the small block erase mode, you will
> need to change the erase command from an 0x50 to 0x30.
>
>    I can provide a patch for the 2.4.27 kernel if you are interested.
>
> > If anyone has some clues about this, I will be glad finishing my
> > patch ;)
> >
> > Thank you very much in advance.
> >
> > [1] : http://www.sst.com/downloads/datasheet/S71288.pdf



-- 
Cordialement, Florian Fainelli
---------------------------------------------
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://lists.infradead.org/pipermail/linux-mtd/attachments/20070506/d9fbf56e/attachment.bin