[fedora-arm] Flash GuruPlug NAND without JTAG cable?

[Norbert Wegener]

Hi Mahavir
I changed the settings accordingly to:

# MTD device name        Device offset        Env. size        Flash
sector size        Number of sectors

# NAND example
/dev/mtd0               0x60000                 0x20000               
0x20000                        1

Nevertheless the Bad CRC stays with fw_printenv:

uncorrectable error : Warning: Bad CRC, using default environment
bootcmd=bootp; setenv bootargs root=/dev/nfs
nfsroot=${serverip}:${rootpath}
ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; bootm
bootdelay=5
baudrate=115200

root at sheeva:~# ./fw_setenv x_bootargs_root 'root=/dev/sda1 rootwait'^M
Warning: Bad CRC, using default environment^M
root at sheeva:~# exit^
reboot again does not work and again uboot has to be reinstalled.
Regards
Norbert




Mahavir Jain wrote:
> Hi Nobert
>
> On Wed, 2010-05-12 at 04:09 -0700, Norbert Wegener wrote:
>> Hi
>> For some time I have the problem to which the solution is described
>> here.
>> Unfortunately this seems to work on a guruplug and does not work on a
>> sheevaplug.
>> With the binaries and config, that had been attached to the last mail, I
>> tried to set variables from a running linux:
>>
>> root at sheeva:~# ./fw_printenv ^M
>> Warning: Bad CRC, using default environment^M
>> bootcmd=bootp; setenv bootargs root=/dev/nfs
>> nfsroot=${serverip}:${rootpath} ip=
>> ${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; bootm^M
>> bootdelay=5^M
>> baudrate=115200^M
>>
>> Linking fw_printenv to fw_setenv and setting variables results in:
>>
>> Warning: Bad CRC, using default environment^M
>>
>> Even worse: If I reboot the sheevaplug hangs and I have to reinstall
>> uboot
>> via openocd.
>>
>> Questions is, how to set the uboot environment on a sheevaplug from a
>> running system?
>
> Try changing Device offset to 0x60000 (ENV starts here for sheevaplug)
> in fw_env.config file assuming you are using open U-Boot.
>
> Thanks
> Mahavir
>
>>
>> Norbert
>>