[Gumstix-users] cp.b can't write to protected flash sectors

[Jaya K. <jay...@gm...>]

Hi Gumstix friends,

I'm a gumstix newbie. My apologies if this question may have been
answered elsewhere [I googled but didn't hit a solution].

I'm on a gumstix connex 16MB flash. It came with u-boot 1.1.4 and a
pre-existing 1441 gumstix-buildroot based rootfs. (1441 also builds
u-boot 1.1.4)

I was working on a device driver for a modified 2.6.20gum kernel and
had not replaced the rootfs image with an updated kernel. I was just
using fatload mmc 1 a2000000 uImage.bin and then booting from that
MMC->ram loaded kernel each time. This has been working fine for me
for at least a week or 2.

However, after a driver induced panic today, I seemed to have managed
to corrupt the jffs2 image to the point that it did not boot. I got
lots of unknown node errors and failure to boot even after 10 mins.

So I decided it was time to reflash my rootfs. I believe the 1441
rootfs includes the uImage.bin. The eventual error that I got was that
cp.b couldn't write the 40000 flash sector which flinfo reports as
being RO below. I felt afraid of doing protect off 1:2-2 for fear of
bricking it. Any and all advice/pointers are welcome. I'm also on
#gumstix.

Thanks,
jaya

ps: on an unrelated note, has anyone gotten a 2.6.22 kernel .mk or
setup up? i think top of truck gumstix-buildroot was 2.6.21 when i
last looked.

GUM> fatload mmc 1 a2000000 rootfs.arm_nofpu_cfb.jffs2
reading rootfs.arm_nofpu_cfb.jffs2

3680784 bytes read
GUM> protect on 1:0-1
Protect Flash Sectors 0-1 in Bank # 1
.. done
GUM> erase all
Erase Flash Bank # 1 - Warning: 3 protected sectors will not be erased!
.............................................................................................................................
done
GUM> cp.b a2000000 40000 ${filesize}
Copy to Flash... Can't write to protected Flash sectors
GUM> boot
Instruction Cache is ON
### JFFS2 loading 'boot/uImage' to 0xa2000000
find_inode failed for name=uImage
load: Failed to find inode
### JFFS2 LOAD ERROR<0> for boot/uImage!
GUM> flinfo

Bank # 1: CFI conformant FLASH (16 x 16)  Size: 16 MB in 128 Sectors
 Erase timeout 4096 ms, write timeout 0 ms, buffer write timeout 1024
ms, buffer size 32
 Sector Start Addresses:
   00000000 (RO) 00020000 (RO) 00040000 (RO) 00060000      00080000