Hi,
Am 18.11.2011 19:10, schrieb Holger Brunck:
Hi,
On 18/11/11 14:57, Spranger, Jörg wrote:
we have a small AT91RM9200 based board, running Linux on it and it worked fine.
Now we face 2 major changes:
1. The strataflash JS28F128j3d75 shifted to JS28F128j3f75
2. The uboot is updated from 2009.01 to 2010.09
Now when I have a new board flashing the bootloader and make a reboot,
I get the warning
*** Warning - bad CRC, using default environment
That is ok, because in the flash on that place are only FFFFs when the flash is
erased.
Normaly I get rid of it, when I make a setenv.
This works with the old u-boot with both types of flash. When I take the new
uboot it only
works with the old flash. The curious thing is that taking the new uboot and
the new flash
the setenv writes the variables into the flash at the right place BUT after a
reboot
I get the same warning. Looking at the flash with md, I can see the hole
environment variables
In place. Also the CRC is the same as when I do it with the old flash.
It seems that there is something different when reading from the device, maybe
an initilisation?
This is the point where I have to ask the community where to look next.
we had similar problems with a Intel Strata 28F320 when updating from a
v2009.08 u-boot to a recent
version. We had to revert one commit (and still do in our local tree). See
discussion:
http://lists.denx.de/pipermail/u-boot/2011-March/088382.html
Best regards
Holger
.
thank you for responding, yes it seems like a bug in the chip.
I took a look into the documentation from micron an I found a
hint that using the wrong command will put the chip in "F" revission to the
Read Status Register mode instaed of Array read mode in the "D" revission.
But now where can I look to find the command sequence used by the driver?
Where can I find the initialisation sequence for the uboot flash driver?
best regards
Joerg
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