Linksys WRT54G v8.1 - supported?

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Eko
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Joined: 07 Jun 2006
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PostPosted: Sun Mar 16, 2008 9:43    Post subject: Linksys WRT54G v8.1 - supported? Reply with quote
This is only for WRT54G v8.1 fccid: Q87-WRT54GV81

What we know:
- it runs linux from factory
- we know how to make right firmware header

What we don't know:
- we don't have cfe from it to get defaults

What we need:
- one brave tester
- JTAG and serial console is advantage
- wholeflash dump

Please keep all about wrt54g v8.1 in this topic:

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ognetadmin
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Joined: 17 Mar 2008
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PostPosted: Mon Mar 17, 2008 17:46    Post subject: Reply with quote
If brave means willing to brick a device, then I qualify and am happy to try.

I have four v8.1 devices that I want to turn into client bridges. DD-WRT works perfectly on the v8.0 boxes I'm using.

Can you tell me specifically what you need? (If my need to ask that question disqualifies me, I understand.)
dacman61
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Joined: 22 Oct 2007
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Location: Buckhannon, West Virginia, U.S.A.

PostPosted: Mon Mar 17, 2008 19:39    Post subject: Reply with quote
What are the first 4 digits of the serial number on those v8.1's?

If I see if they have one at a local store, I'll solder a JTAG header on it and dump the CFE.bin for you.

Does anyone have any pictures of the inside of one?
ognetadmin
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Joined: 17 Mar 2008
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PostPosted: Mon Mar 17, 2008 21:16    Post subject: Reply with quote
MDF0... is the one in front of me.

I'll upload a pic of the board once I remember how to crack the case.
Eko
DD-WRT Developer/Maintainer


Joined: 07 Jun 2006
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PostPosted: Mon Mar 17, 2008 22:05    Post subject: Reply with quote
Yes, getting cfe.bin with JTAG is the safest way we can add support.
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ognetadmin
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PostPosted: Mon Mar 17, 2008 23:40    Post subject: Reply with quote
WRT54G_v81_board.jpg


WRT54G_v81_board.JPG
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WRT54G_v81_board.JPG


ognetadmin
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PostPosted: Mon Mar 17, 2008 23:43    Post subject: Reply with quote
Sorry about the huge pic. Someone please speak up if I should repost a smaller one.
biggy boy
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Joined: 15 Feb 2008
Posts: 221
Location: Ontario Canada

PostPosted: Tue Mar 18, 2008 0:13    Post subject: Reply with quote
Man I don't see where you would even attach the header!
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jlells01
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Joined: 17 Mar 2008
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PostPosted: Tue Mar 18, 2008 0:36    Post subject: Reply with quote
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=29127&sid=55f6bf50293a56c5513d1f88c5856f23

Is V8.1 drastically different from V8 or V8.2?
soulstace
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Joined: 04 Aug 2007
Posts: 6427

PostPosted: Tue Mar 18, 2008 0:53    Post subject: Reply with quote
How much Flash/RAM in versions 8.1 and 8.2?

Is that (J2) a serial port in the photo above? If so, maybe pull cfe off with that?
ognetadmin
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Joined: 17 Mar 2008
Posts: 7

PostPosted: Tue Mar 18, 2008 2:43    Post subject: Reply with quote
jlells01 - I tried those instructions (using v3 of the "killer")and the router kept telling me the initial upload failed. I'll give it another go and post the results.
ognetadmin
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Joined: 17 Mar 2008
Posts: 7

PostPosted: Tue Mar 18, 2008 3:12    Post subject: Reply with quote
Starting with factory firmware v8.1.08, I tried the instructions with and without the tftp tool. Neither works for me. Message from the router web page is "Upgrade are failed!"
Tornado
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Joined: 07 Jun 2006
Posts: 2087
Location: Odessa, Ukraine

PostPosted: Tue Mar 18, 2008 5:23    Post subject: Reply with quote
Do not use Killer on a Gv 8.1, it already has Linux on it, and a CFE, we just needed the defaults from the CFE. It does not look like they installed a Jtag on it. We have tested DD-WRT on a Gv 8.0 with a Gv 8.1 firmware running on it...and that runs fine, but the real test has to be on a Gv8.1, we need to see if anything in the CFE would cause problems, different GPIO's, etc..
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Eko
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PostPosted: Tue Mar 18, 2008 5:54    Post subject: Reply with quote
Sometimes one needs to look at the back side of PCB, there is JTAG Smile


v81jtag.jpg
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v81jtag.jpg



_________________
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Send inquiries to: debrick at dd-wrt dot si

Have a brick you don't need?

Paypal & Amazon.com gift cards are welcome. Every $ or € counts. Email: donate at dd-wrt dot si
Tornado
DD-WRT Developer/Maintainer


Joined: 07 Jun 2006
Posts: 2087
Location: Odessa, Ukraine

PostPosted: Tue Mar 18, 2008 6:06    Post subject: Reply with quote
Damn, I thought about that. I can't see your pic ?

Never mind, see it.

_________________
Want JTAG support - Donate a router
or Donate with PayPal !

My preferred parallel jtag adapter:
TIAO Parallel adapter

Tjtag website - http://tjtag.com

Compiling DD-WRT on:
AMD Phenom II X6 1090T @ 3926.667 Mhz

Aptosid X64 - Debian SID X64
Ubuntu 10.10 X64 - Arch X64
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