Re: Porting to Intel P33 flash

[Hamish Moffatt <hamish@cloud.net.au>]

On Fri, May 16, 2008 at 01:59:43PM +0100, Alexey Korolev wrote:
> Hi
> 
> > 
> > Funny you say that...  I just modified the code where it checks CFI
> > version  and it seems to be working without further modification. I've not
> > tested much though so I may have more to do. I do have to write to this
> > but not much.
> > 
> > James
> It is good to hear this. Please check number of RWW partitons
> (numvirtchips variable) and 9th bit of extp->FeatureSupport. 
> Everything is Ok if numvirtchips == 1 or extp->FeatureSupport bit 9 is 0.
> 
> As I remember some versions of MTD prior to 2.6.17 had
> problems with CFI offset calculation. It led chip to be identified as
> multiple partitioned device when it should have 1 partiton. 

How do you mean multiple partitions?

Here is what I see with the 8Mb P33 NOR flash with 2.6.15:

IXP4XX-Flash.0: Found 1 x16 devices at 0x0 in 16-bit bank
 Intel/Sharp Extended Query Table at 0x010A
 Intel/Sharp Extended Query Table at 0x010A
 Intel/Sharp Extended Query Table at 0x010A
 Intel/Sharp Extended Query Table at 0x010A
 Intel/Sharp Extended Query Table at 0x010A
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
erase region 0: offset=0x0,size=0x20000,blocks=63
erase region 1: offset=0x7e0000,size=0x8000,blocks=4

The output with 2.6.24 is the same. I only modified 2.6.15 to recognise
the new minor revision of the P33 flash.

Anyway 2.6.15 is history for me now (we ran it for 1 year but just
upgraded to 2.6.24), I only mention it for James's information.

Hamish
-- 
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>