ST flashes

Hi,
Im using 2.4.19-rmk7-pxa1 ... i know its really old and all
that ... but i have no options right now...
but anyway..
Here's my problem.
I have two pxa 255 boards , one with ST flash and one with AMD.
I configured them to use the lubbock flash driver , and made one partition for jffs2. sorry i dont have the board with me, i shall post the dumps soon..

On both the boards,
it boots up properly , performs all file operations smooth ...mount , read write etc..
on the AMD , this performance is consistent even after powering the board down.
But on the ST , the moment you power down the board ! , the next time , it only mounts , but doesnt
let me perform any fops. I keep getting I/O errors..for only write operations... read works , coz i could ls in the partition. It also doesnt let me format the partition.

So I upgraded , the mtd subsys , along with jffs2 , but still the same behaviour...
Also , after upgrading mtd , i found that , the lubbock driver uses ioremap_cached and DMA , which is not available in 2.4.19 , so i disabled all of it , but then the cfi probe fails , and only rom_mapping works... due to which im guessing , mtdblock0 gets write protected and mounts jffs2 as read-only.

So I used the physmap driver , created one partition just like the lubbock driver .. , but then again , it mounts it as ro !!
here again , only ROM mapping works , it doesnt detect the flash type anymore. I have enabled Intel/Sharp , ST and AMD flash driver options in the CFI submenu.

Before upgrading the mtd , these options used to work.

Can anyone , give me a lead here ?
Thanks,

-------------------------
Ashwin Chaugule
Embedded Systems Engineer
Aftek Infosys Ltd.
[Embedded Division]