Linksys WRT54G v2.2

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bg (G54)
Wireless-G Broadband Router
Linksys WRT54G-02.jpg
Support
Wikipedia
InfoDepot Wiki
WikiDevi.wi-cat.ru
3rd Party Firmware
dd-wrt
OpenWrt
Tomato any flavor
Gargoyle
Status Unknown
Platform
BrandModelRev
Linksys WRT54G v2.2
Serial number prefix
CDF7
FCC ID
IC ID
Type
wireless router
Series
WRT54G
CPU1
CPU1 Type
MIPS BMIPS3300 (R1)
CPU1 Speed
216 MHz
Flash1 Chip
Intel TE28F320C3BD70
Flash1 Size
4 MiB4,194,304 B <br />32,768 Kib <br />4,096 KiB <br />32 Mib <br />0.00391 GiB <br />
RAM1 Size
16 MiB16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
RAM1 Chip
SK hynix HY5DU281622ET-J x 2
nvram Size
32K
ETH chip1
Switch
Broadcom BCM5325E
Ethernet Port Count
1-100MbE-WAN
4-100MbE-LAN
Wired Standard
IEEE 802.3/3u
Port-based vlan
Yes - Via GUI & nvram

802dot11 OUI: 00:12:17 (16 E, 32 W), 00:13:10 (16 E, 17 W)
Ethernet OUI: 00:12:17 (16 E, 32 W), 00:13:10 (16 E, 17 W)

Stock bootloader
CFE
Stock FW OS
Linux
Expansion IF types
none specified
Power
12 VDC, 1 A
Connector type
barrel
Serial Port (UART)
yes, 10-pin header, unpopulated, (115200 8N1)
JTAG Port
yes, 12-pin header, unpopulated
Other

Default SSID: linksys (53 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1310 additional devices
of which 153 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 267 additional devices
of which 134 are Linksys devices

Manuf/OEM/ODM
3rd Party Firmware Support
DD-WRT • (List)
, OpenWrt • (List | Dev | DLs)
, Tomato • (List | DLs)
, TomatoUSB • (List | DLs)
Retail
Availability common
FCC approval date 17 September 2004
Country of manuf China
Physical
Dimensions
7.32" x 1.89" x 6.06"
Radio 1
Chip1
Chip2
Broadcom BCM2050
Wireless interface OUI
00:12:17, 00:13:10
Antenna Connector Type
RP-TNC
Wireless Standard
IEEE 802.11b/g
802.11g
up to 54 Mbps
802.11b
up to 11 Mbps
WiFi Operating Frequency
2.4 GHz
Radio cor_rev
7
Radio Capabilities
ap sta wet led wme pio 802.11d 802.11h rm cqa afterburner
 FCC ID
Linksys WRT54G v3.0Q87-WT54GV22
Linksys WRT54G v3.1Q87-WT54GV22
Linksys WRT54GS v1.1Q87-WT54GV22
Linksys WRT54GS v2.0Q87-WT54GV22
Linksys WRT54GS v2.1Q87-WT54GV22
 CPU1 brandRadio1 chip1 brandRadio1 chip2 brand
Linksys WRT54G v1.0BroadcomBroadcomBroadcom
Linksys WRT54G v1.1BroadcomBroadcomBroadcom
Linksys WRT54G v2.0BroadcomBroadcomBroadcom
Linksys WRT54G v2.2BroadcomBroadcomBroadcom
Linksys WRT54G v3.0BroadcomBroadcomBroadcom
Linksys WRT54G v3.1BroadcomBroadcomBroadcom
Linksys WRT54G v4BroadcomBroadcomBroadcom
Linksys WRT54G v5.0BroadcomBroadcomBroadcom
Linksys WRT54G v5.1BroadcomBroadcomBroadcom
Linksys WRT54G v5.2BroadcomBroadcomBroadcom
Linksys WRT54G v6.0BroadcomBroadcomBroadcom
Linksys WRT54G v7.0AtherosAtheros
Linksys WRT54G v7.2BroadcomBroadcom
Linksys WRT54G v8.0BroadcomBroadcom
Linksys WRT54G v8.1BroadcomBroadcom
Linksys WRT54G v8.2BroadcomBroadcom
Linksys WRT54G-TMBroadcomBroadcomBroadcom
Linksys WRT54GHRalinkRalink
Linksys WRT54GP2MarvellMarvellMarvell
Linksys WRT54GP2A-ATIntel XScaleInprocommRFMD

For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.

For a list of all currently documented Linksys device with specifications, see Linksys.

54 Mbps - 2.4GHz 802.11g = G54 class

Additional FCC IDs of Q87-HGA5T-1 (Linksys HGA5T, high gain antennas), Q87-HGA7T-6 (Linksys HGA7T, high gain antennas)

Wi-Fi Certified : W002882 (as of 10/01/2004)

There is an additional certification of W002940 (10/29/2004) for this device which notes added WPA2 capability.

Links of Interest

Support page • Downloads (US)

Flashing

Flashing DD-WRT

 

  1. Read the peacock announcement found here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486
  2. Do a Hard reset or 30/30/30 on the router according to note 1 of the peacock announcement (30/30/30)
  3. Set a static IP on your computer to 192.168.1.7. Subnet mask should be 255.255.255.0.
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the lan cable between them. Turn your firewall and any wireless computer connections OFF.
  5. Power cycle the router (unplug the power from the router for 30 seconds and then plug it back in)
  6. Open your browser to 192.168.1.1 by putting that in the browser address window of your browser. You should open the linksys webgui and NOT a page that says Management Mode. If you see management mode, power cycle the router again.
  7. Leave the username blank and enter "admin" as the password
  8. Go to administration and firmware upgrade
  9. Navigate to the folder that you are using, and select dd-wrt.v24-15230_VINT_mini.bin
  10. Hit upgrade
  11. When you get a message that the upgrade is successful, wait FIVE FULL minutes before continuing.
  12. If you don't get success, repeat from steps 6 up to this one. If you still don't get success, clear your browser cache. Try using a different browser as well, to navigate to 192.168.1.1.
  13. When you can access the dd-wrt webgui using a browser at 192.168.1.1, power cycle the router.
  14. When you can again access the dd-wrt webgui using a browser at 192.168.1.1, do another Hard reset or 30/30/30 on the router.
  15. At this point you can choose to put a different build on, depending on what you needs are.
  16. Reset your computer ethernet connection to auto IP and auto DNS
  17. Check for recommended builds here.

Flashing OpenWrt

Linksys WRT54G On the OpenWrt Wiki

On the OpenWrt ToH (techdata entry)
On the OpenWrt Wiki
Support started version: 0.9
Current supported version: 10.03.1

Please insert instructions here

Using the Linksys web GUI

It is possible to install OpenWrt directly with the Linksys web GUI. If you are initially installing OpenWrt use the Linksys web GUI, this is the easiest way.

  • Download the openwrt-wrt54g-squashfs.bin firmware image from the brcm-2.4 folder to your PC.
  • You can find that image at: http://downloads.openwrt.org/backfire/10.03.1/brcm-2.4/
  • Actually the safest version to use would be 8.09. Hmmm, it looks like 10.03.1 is safe but you must use the brcm-2.4 variant like in the link above. I am not risking bricking my router for the initial flash, so I am going with 8.09.
  • Open http://192.168.1.1/Upgrade.asp in your browser or manually go to http://192.168.1.1 → Administration → Firmware Upgrade
  • Upload openwrt-wrt54g-squashfs.bin
  • Wait 2 minutes. The router will reboot itself automatically after the upgrade is complete.
  • Your router should now be telnettable at 192.168.1.1. The web interface luci is also available at http://192.168.1.1 . Telnet is disabled and ssh is enabled once a password has been set.
  • Type these commands out in telnet/ssh. This is to ensure that tftp is available, in case your router gets bricked.
nvram set boot_wait=on
nvram set boot_time=10
nvram set wait_time=10 #important for some models
nvram commit && reboot
  • You're done! At this point, you are free to continue using brcm-2.4. However, if you wish to use brcm47xx, proceed below.
  • Download the image openwrt-brcm47xx-squashfs.trx here: http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/
  • Upload using luci at System > Flash Firmware
  • OR, you can simply ssh into the router,

cd /tmp wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx sysupgrade /tmp/openwrt-brcm47xx-squashfs.trx

  • Wait for the router to reboot and login! In case you somehow found out that you can't telnet, then ssh should be possible since your previous settings before flashing remained (unless you used sysupgrade -n)

Using the TFTP method

Right after flashing at your first login to OpenWrt set the following NVRAM parameters to enable tftpd at bootup:

nvram set boot_wait=on
nvram set boot_time=10
nvram set wait_time=10
nvram commit && reboot

NOTE: Do not touch any other NVRAM parameters. NVRAM is only used as environment for the bootloader. OpenWrt ignores NVRAM parameters.

NOTE: On WRT54GL (at least), you should probably use 'wait_time' instead of 'boot_time'. bg300: Added.

NOTE: On WRT54GS v1.1 too you have to use 'wait_time' instead of 'boot_time', anyway if in doubt add both parameters.

Once you have set the NVRAM parameters above it is possible to use a TFTP client to flash OpenWrt. The TFTP method is also the recommended way to restore the original Linksys firmware or switch to other third-party firmwares.

First download a firmware image file ending in ".bin", e.g. openwrt-wrt54g-squashfs.bin.

Then follow the Generic TFTP flashing instructions.

Flashing Tomato

????

Flashing Gargoyle

Install Guide

Upgrading

Updating DD-WRT

If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of 192.168.1.7. (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. Wait...at least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!

Upgrading OpenWrt

Using mtd OR sysupgrade

If you have already installed OpenWrt and like to reflash for e.g. upgrading to a new OpenWrt version. It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

cd /tmp/ wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx # The file must be the trx file. mtd write /tmp/openwrt-brcm47xx-squashfs.trx linux && reboot

OR

cd /tmp/ wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx # The file must be the trx file. sysupgrade /tmp/openwrt-brcm47xx-squashfs.trx

Feel free to explore the rest of sysupgrade options by typing 'sysupgrade' in the terminal.

Using LuCI

  1. Select Administration in the top right corner
  2. Choose the System > Flash Firmware tab
  3. Click Browse and navigate to the firmware (it must be a .trx file) you wish to flash to
  4. Click 'Upload image'
  5. Follow the instructions

Upgrading from Tomato

The instructions from the Tomato upgrade instructions are confirmed to work with Backfire (10.03.1-rc4, r24045)

Reverting

Reverting to OEM Firmware from DD-WRT

  1. Read the peacock announcement found here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486
  2. Do a Hard reset or 30/30/30 on the router according to note 1 of the peacock announcement (30/30/30)
  3. Set a static IP on your computer to 192.168.1.7. Subnet mask should be 255.255.255.0.
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the lan cable between them. Turn your firewall and any wireless computer connections OFF.
  5. Power cycle the router (uplug the power from the router for 30 seconds and then plug it back in)
  6. Open your browser to 192.168.1.1 by putting that in the browser address window of your browser. You should open the linksys webgui and NOT a page that says Management Mode. If you see management mode, power cycle the router again.
  7. Enter your username and password
  8. Go to administration and firmware upgrade
  9. Navigate to the folder that you are using, and select WRT54G_v4.21.1_fw.bin once you've unzipped it.
  10. Hit upgrade
  11. When you get a success, wait FIVE FULL minutes.
  12. When you can again access the Linksys webgui using a browser at 192.168.1.1, do another Hard reset or 30/30/30 on the router.
  13. Reset your computer ethernet connection to auto IP and auto DNS

JTAG-Serial Info

JTAG

JTAG Pinouts

 nTRST   1o o2	GND
   TDI   3o o4	GND
   TDO   5o o6	GND
   TMS   7o o8	GND
   TCK   9o o10	GND
 nSRST  11o o12  N/C

Using Universal JTAG Adapter

 white    1o o2	 black
   red    3o o4	 GND
  blue    5o o6	 GND
 green    7o o8	 GND
 yelow    9o o10  GND
 orange  11o o12  N/C

DD-WRT JTAG Recovery

  • /noemw switch required for backup & flash
  • /noemw /nocwd switches required for erase
  1. Backup CFE x2 (Compare the files, they must match exactly or there is something wrong with your JTAG setup)
  2. Erase Wholeflash x2
  3. Flash CFE
  4. Unplug Power
  5. Unplug JTAG Cable

TFTP:

  1. Set Rig ip static 192.168.1.10
  2. Plug network cable from rig to port 1
  3. Get TFTP ready, server ip - 192.168.1.1, Password - blank, file - dd-wrt.v24_mini_generic.bin
  4. Plug in power
  5. As soon as windows says "connected" hit upgrade. May have to use a network hub to make sure windows is always connected.
  6. Hard Reset 30\30\30

Serial

Serial Pinouts

 VCC  1 o o 2  VCC
 TX1  3 o o 4  TX0
 RX1  5 o o 6  RX0
 N/C  7 o o 8  N/C
 GND  9 o o 10 GND

DD-WRT Serial Recovery

Modified Redhawk0 instructions

  1. Print out these instructions for Off-Line use
  2. Connect PC to router with a network cable
  3. Configure PC with a static IP of 192.168.1.10
  4. Connect Serial cable
  5. Start one of the programs from above
  6. Get TFTP ready with file selected
  7. Use dd-wrt.v24_mini_wrt54g.bin
  8. Connect power to the router
  9. start a rapid fire Cntl-C as you plug the router to power
  10. type "nvram erase" w/o quotes, hit enter
  11. type "flash -noheader : flash1.trx" w/o quotes, this starts the tftp daemon, hit enter
  12. but have TFTP ready
  13. Click go or start on TFTP
  14. give it 5 minutes after it finishes
  15. then power cycle....Hard reset or 30/30/30...then config
  16. when it stops spitting out txt....hit the enter key...you should get a login prompt...at that point, power cycle it, hard reset...then config
  17. you'll see it boot up


vlan Info

DD-WRT vlan Info

Confirmed the WRT54G v2.2 supports port-based vlans via the GUI & nvram.

"/proc/switch/eth0" does exist

WRT54G v2.2's ports are mapped like this:

4 3 2 1 | case labels
3 2 1 0 | nvram port numbers

Defaults

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19306 bytes (13462 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=0
port3vlans=0
port2vlans=0
port1vlans=0
port0vlans=1
size: 19306 bytes (13462 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19306 bytes (13462 left)

GUI

Port 4 moved to WAN's vlan

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19478 bytes (13290 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=1 18 19
port3vlans=0 18 19
port2vlans=0 18 19
port1vlans=0 18 19
port0vlans=1 18 19
size: 19478 bytes (13290 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19478 bytes (13290 left)
root@DD-WRT:~#

nvram

Port 4 moved to WAN's vlan

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=2 1 0 5*
vlan1ports=3 4 5
size: 19420 bytes (13348 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=0
port3vlans=0
port2vlans=0
port1vlans=0
port0vlans=1
size: 19420 bytes (13348 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19420 bytes (13348 left)
root@DD-WRT:~# lsmod
Module                  Size  Used by
ip_nat_pptp             2560   0 (unused)
ip_conntrack_pptp       3036   1
ip_nat_proto_gre        1664   0 (unused)
ip_conntrack_proto_gre    2584   0 [ip_nat_pptp ip_conntrack_pptp]
etherip                 5104   0 (unused)
switch-robo             5356   0 (unused)
switch-core             6352   0 [switch-robo]
root@DD-WRT:~# ls /proc/switch
eth0
root@DD-WRT:~# cat /proc/switch/eth0/vlan/0/ports
0       1       2       5t*
root@DD-WRT:~# cat /proc/switch/eth0/vlan/1/ports
3       4       5t
root@DD-WRT:~# cat /proc/switch/eth0/vlan/2/ports
3
root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=2 1 0 5*
vlan1ports=3 4 5
size: 19560 bytes (13208 left)
root@DD-WRT:~#

Pictures

DarkShadow's Unit
FCCID Q87-WT54GV22

Notes

DD-WRT Notes

Rare 32MB

anectine17 wrote: The v.2 and v.2.2, on occasion, came with a 32MB RAM chip with only 16MB enabled. The vast majority of these routers came with a basic 16MB RAM chip. To tell whether or not you have the "special" one with the 32MB chip, you have to open the router and read the number on the RAM chip itself. If you have chip #issi is42s16800a-7t, you can enter

nvram set sdram_init=0x008
nvram set sdram_ncdl=0x000
nvram commit
reboot

and that will enable all 32MB. If you have any other chip, that hack will not work...in fact if you try it, you'll end up with a brick. Good luck.

The SK hynix chip, HY5DU281622ET-J is the most common one in the v.2 and v.2.2. I've taken apart probably 50 v.2's and a dozen 2.2's and I've seen 2 of the 32MB chips in the v.2.2, and 4 in the v.2. They're out there, but getting harder and harder to come by. Most people hang on to them once they get them.