MTD for Intel Strata L18 Flash

MTD for Intel Strata L18 Flash

[Niraj Maheshwari]

Hi,

I am using Linux Kernel 2.6.10 and enabled the JFFS2 file system in the kernel.
Flash has a partition ( 0xA0980000 ) which will be used for JFFS2 and
it's erased.

After booting the kernel,  when i try to mount the JFFS2 partition
from flash, it works fine and it's empty.

When i try to copy any data to mounted partition then it gives following error.

****************************************************************************************
[root@Linux /]$ mount
/dev/ram0 on / type cramfs (ro)
/proc on /proc type proc (rw,nodiratime)
none on /dev/pts type devpts (rw)
/dev/mtdblock0 on /disc type jffs2 (rw,noatime)
[root@Linux /]$ cp etc/issue disc/
Write error in obliterating obsoleted node at 0x00540000: -30
Write of 68 bytes at 0x0054000c failed. returned -30, retlen 0
Not marking the space at 0x0054000c as dirty because the flash driver returned r
etlen zero
Write of 68 bytes at 0x0054000c failed. returned -30, retlen 0
Not marking the space at 0x0054000c as dirty because the flash driver returned r
etlen zero
cp: unable to open `disc/issue': Read-only file system
*******************************************************************************************

Pl. note that Same Kernel Image and ramdisk works fine with Intel W18
(28F128W18) flash but doesn't work with Intel Strata L18 (28F256L18)
flash.

Can anyone tell me what could be the issue as both the flashes are CFI
compliant ?

Thanks in advance
Niraj

Re: MTD for Intel Strata L18 Flash

[Josh Boyer]

On Thu, 2005-05-12 at 16:40 +0530, Niraj Maheshwari wrote:
> After booting the kernel,  when i try to mount the JFFS2 partition
> from flash, it works fine and it's empty.
> 

> Write of 68 bytes at 0x0054000c failed. returned -30, retlen 0
> Not marking the space at 0x0054000c as dirty because the flash driver returned r
> etlen zero
> cp: unable to open `disc/issue': Read-only file system
> *******************************************************************************************
> 
> Pl. note that Same Kernel Image and ramdisk works fine with Intel W18
> (28F128W18) flash but doesn't work with Intel Strata L18 (28F256L18)
> flash.
> 
> Can anyone tell me what could be the issue as both the flashes are CFI
> compliant ?

-30 is -EROFS.  That seems to indicate that the chip(s) is/are write
protected at the time you are trying to do the write.

I don't have the datasheets for those chips around, but there are some
Intel chips that power-on with all the eraseblocks locked.  That is
probably what you are seeing.  You'll need to unlock them before you can
write.

josh