Problems with Intel TE28F320 B3

[Kremer, Alex]

I ran into the same problem a while ago and posted a patch.
The patch is to cvs from Aug, 19. Note that it modifies
the maps/dc21285.c code and Config.in, so I'm sending separately 
intel_bb.c file which adds support for 28F*B Fast Boot Block Series.

Here is a short explanation of what I found:

As opposed to Intel's 28F*J Strata Flash series the 
old Fast Boot Block (28F*B) series is not CFI compliant.
I couldn't coerce it to work as a jedec, neither.

The Lart (devices/lart.c) uses a chip from this series, but the data bus has
a totally crazy mapping.

I wrote a module for this series somewhat based on the chips/amd_flash.c
code.
Since I have it mapped via dc21285 I modified maps/dc21285.c to probe using
my module ("intel_bb_probe") instead of using cfi_probe. 
(I also had to modify the write16, since the code there uses, IMO,  a wrong
addr. mask).

BTW: For some reason for Intel's 28F* chips the most important is the letter
	that follows the size code, so the 28F128J means that it belongs to
a Strata Flash line
	which is CFI comliant, while 28F128B belongs to the Fast Boot Block
Flash line, which is
	really a pre-CFI,	and the CFI code wont work.

The modification to maps/dc21285.c should probably try to first probe cfi,
fallback to intel_bb
and at the end try rom mapping, so at least kernel can mount root. Does
anyone have a better suggestion.

Kreso



| -----Original Message-----
| From: David Woodhouse [mailto:dwmw2 at infradead.org]
| Sent: Tue, September 04, 2001 4:40 PM
| To: Norbert Leon
| Cc: linux-mtd at lists.infradead.org
| Subject: Re: Problems with Intel TE28F320 B3 
| 
| 
| 
| norbert at safetech.com said:
| >  I'm working on an intel te28f320 b3ba110 (complete reference) and i
| > can't get my system to recognize it ...  
| 
| Some of the 28F320 chips are CFI-compliant and some aren't. The other 
| letters and numbers you quoted didn't seem to help me work 
| out which you 
| have.
| 
| Turn off CONFIG_MTD_RAM, CONFIG_MTD_ROM and CONFIG_MTD_SLRAM. 
| You don't 
| need them.
| 
| --
| dwmw2
| 
| 
| 
| ______________________________________________________
| Linux MTD discussion mailing list
| http://lists.infradead.org/mailman/listinfo/linux-mtd/
| 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: mtd-cvs-2001-08-19-intel_bb.patch
Type: application/octet-stream
Size: 34079 bytes
Desc: not available
Url : http://lists.infradead.org/pipermail/linux-mtd/attachments/20010904/b2601fed/attachment.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: intel_bb.c
Type: application/octet-stream
Size: 29528 bytes
Desc: not available
Url : http://lists.infradead.org/pipermail/linux-mtd/attachments/20010904/b2601fed/attachment-0001.obj