[U-Boot] ACER n310 NAND write protection issue

[fcipaq <daniel.kammer@web.de>]

Figured out myself. If anyone has the same issue:

set bit 12 of port A to 1:

 GPADAT |= (1 << 11)


fcipaq wrote:
> 
> Hey everyone,
> 
> I've got an ACER n310 (n300 series). It features a s3c2440 running at 300
> MHz, 64 MB SDRAM and 128 MB NAND ROM (it's Samsung k9f1g08). It's not
> equipped with any NOR-Flash. Apart from that it's got quite a similar
> configuration as FriendlyARM's Mini2440.
> I downloaded the sources of u-boot and configured it according to my PDA's
> hardware. So far, u-boot is running and I'm able to read the whole
> NAND-Flash. But when I'm trying to unlock the NAND-Flash, I get the
> following error message:
> 
>   n310 # nand unlock
> 
>   device 0 whole chip
> 
>   nand_unlock: start: 00000000, length: 134217728!
> 
>   nand_unlock: Device is write protected!
> 
>   Error unlocking NAND flash, write and erase will probably fail
> 
> What I conclude from that is: the (NOT)WP-Pin is set to ground. The
> Mini2440 is not effected by this kind of issue as (according to the
> schematics) the (NOT)WP-Pin is connected to VCC.
> However there must be a way to toggle this pin, as the original
> ACER-bootloader and WM5 respectively are able to write to the flash.
> Any ideas how to cancel the write protection or how to figure out what pin
> is connected to WP (schematics are not available)?
> Thanks in advance and best regards
> 
> Daniel
> 

-- 
View this message in context: http://old.nabble.com/ACER-n310-NAND-write-protection-issue-tp31592314p31600786.html
Sent from the Uboot - Users mailing list archive at Nabble.com.