Hello Heiko,
On Tue, Mar 08, 2011 at 02:08:26PM +0100, Heiko Schocher wrote:
Hello,
as I am actual trying to get the keymile boards in sync with actual mainline u-boot, I faced the following Problem with an Intel Strata Flash on the mgcoge (mpc8247 based board):
I couldn;t unprotect/erase/write/protect some (not all!) Flash sectors.
For Example, I could do this without errors on the sectors where u-boot sits (First three sectors), but not with the environment (next two sectors)!
That's exactly the problem I had, but triggered by another valid command sequence.
So it is also a flash bug.
Have you searched with google for your chip plus "errata" or "specification update" as they call that ?
After some debugging, I found out, that, if I revert commit
commit 54652991caedc39b2ec2e5b49e750669bfcd1e2e Author: Philippe De Muyter phdm@macqel.be Date: Tue Aug 17 18:40:25 2010 +0200
Work around bug in Numonyx P33/P30 256-Mbit 65nm flash chips. I have "ported" U-boot to a in house made board with Numonyx Axcell P33/P30 256-Mbit 65nm flash chips. After some time :( searching for bugs in our board or soft, we have discovered that those chips have a small but annoying bug, documented in "Numonyx Axcell P33/P30 256-Mbit Specification Update"[...]
It works again fine, and without problems ... did somebody faced similiar issues with the cfi driver? Some Ideas?
It seems like we'll need to check the flash chip type before issuing one command sequence or another.
Philippe