how to recover erased bootloader?(WHR-G300N)

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ashej
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Joined: 23 Jul 2009
Posts: 3

PostPosted: Thu Jul 23, 2009 12:57    Post subject: how to recover erased bootloader?(WHR-G300N) Reply with quote
Hei people,
sorry for me bad english, i am lithuanian..:)

accidentally i erased my routers bootloader by chosing yes when asking "bootloader firmware erased. write new?" Very Happy i make a big mistake...;| how i can restore bootloader?
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phpmysqlfreak
DD-WRT User


Joined: 29 Jun 2009
Posts: 63
Location: Germany, NRW

PostPosted: Thu Jul 23, 2009 13:17    Post subject: Reply with quote
If the bootloader is really gone, the only thing would be JTAG I think. I don't know if a serial cable is enaugh.

JTAG Examples can be found in the forum.
ashej
DD-WRT Novice


Joined: 23 Jul 2009
Posts: 3

PostPosted: Thu Jul 23, 2009 13:19    Post subject: Reply with quote
ok, i can make jtag cable, but what next? where i can download bootloader for my device? and how flash to device?
phpmysqlfreak
DD-WRT User


Joined: 29 Jun 2009
Posts: 63
Location: Germany, NRW

PostPosted: Thu Jul 23, 2009 13:22    Post subject: Reply with quote
Therefore I don't know. I never used a JTAG or Serial-Cable. Sorry.

I think, if you wait some hours, there will be someone with JTAG knowledge to answer you.


//EDIT:

Perhaps you can ask a mod moving this thread to
Broadcom based (Wi)SoC:
http://www.dd-wrt.com/phpBB2/viewforum.php?f=1

There may be more people reading this problem.
redhawk0
DD-WRT Guru


Joined: 04 Jan 2007
Posts: 10943
Location: Wherever the wind blows- North America

PostPosted: Fri Jul 24, 2009 13:31    Post subject: Reply with quote
phpmysqlfreak wrote:
Perhaps you can ask a mod moving this thread to
Broadcom based (Wi)SoC:
http://www.dd-wrt.com/phpBB2/viewforum.php?f=1

There may be more people reading this problem.


I would...but this isn't a broadcom unit...and I don't have a CFE(bootloader) for this model.


But I would suggest you go to the Broadcom forum and read up on some of the JTAG information...it will give you a better idea of how it works...the problem is...JTAG isn't supporting RaLink processors...to my knowledge....you might be stuck on this one.

redhawk

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Andrej
DD-WRT Novice


Joined: 08 Mar 2007
Posts: 10

PostPosted: Wed Sep 02, 2009 19:16    Post subject: Reply with quote
if you, by any chance, have found a way to access the flash and need the bootloader: i just made a dump of my whr-g300n memory excluding the nvram

http://andrej.in/whrg300n_flash.rar

Code:

dev:    size   erasesize  name
mtd0: 00030000 00010000 "uboot"
mtd1: 00010000 00010000 "uboot-config"
mtd2: 00010000 00010000 "factory-defaults"
mtd3: 003a0000 00010000 "linux"
mtd4: 002ce000 00010000 "rootfs"
mtd5: 00010000 00010000 "nvram"


good luck!
Murrkf
DD-WRT Guru


Joined: 22 Sep 2008
Posts: 11371

PostPosted: Sun Sep 06, 2009 12:40    Post subject: Reply with quote
I believe that this unit does NOT have a jtag port. And you can't get serial port access without a working CFE.

So....I think you might have added to the worldwide landfill problem.

How did you manage to erase the CFE?

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ashej
DD-WRT Novice


Joined: 23 Jul 2009
Posts: 3

PostPosted: Sun Sep 13, 2009 9:50    Post subject: Reply with quote
tu much beer is why i erased bootloader.. Neutral thanks for dump!



Maybe in picture is 14 ping JTAG connector? i am confused Neutral
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