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toh:linksys:wrv54g

Linksys WRV54G

The WRV54G is an X-Scale based 4-port router with WiFi support. The released firmware is based on Jungo's OpenRG. Initial investigation was done by Seattle Wireless. Another source of information is http://www.phj.hu/wrv54g/.

Note that the WRV54G is known as a Gemtek GTW5715 when configuring the Linux kernel. Currently, the default OpenWrt configuration does include kernel support for this device. To use this device, an image must be built from the OpenWrt sources and use make kernel_menuconfig to select the GTW5715.

Hardware Highlights

CPU Ram Flash Network USB WiFi Serial JTag
IXP425 32MB 8MB 4x1 No Yes Yes* Yes*
  • Requires opening the unit.

Installation

Installation involves replacing the manufacturer's firmware (Bootloader and OS).

The bootloader will be replaced with a custom Redboot bootloader. The OS you have to compile yourself :-). The WRV54G does not work with the stock builds avaible.

To replace the original firmware you have three options:

  1. Telnet (requires fw 2.03)
  2. Serial (requires soldering)
  3. JTAG (requires soldering)

Telnet was disabled with firmware 2.10 and higer. Downgrade first. Simple feed te upgrade page from the web interface the older firmware. wrv54g_2.03_fw.rmt Please note that the above file was found somewere on the internets. It may not be safe to use outside a controlled envrionment.

  1. Build your kernel and rootfs
  2. Then follow the installation procedure described for Actiontec MI424-WR.

Hardware

Info

Architecture: ARM
Vendor: Intel
Bootloader: Redboot
System-On-Chip: X-Scale IXP425
CPU Speed: 266 Mhz
Flash-Chip: Intel
Flash size: 8 MiB
RAM: 32 MiB
Ethernet: Micrel KS8995 switch
WiFi: Prism
Serial: Yes
JTAG: Yes

Opening the case

Note: This will void your warranty!

Main PCB

Serial

There is a 10-pin header on the motherboard.

Pin Signal Pin Signal
1 TX 2 +3.3V
3 - 4 +3.3V
5 - 6 GND
7 RX 8 GND
9 - 10 -

JTAG

How to connect to JTAG interface, and how to reflash the device with JTAG tools

See port.jtag for more JTAG details.

GPIO

Bit Function
0 Power LED (a)
1 Internet LED
2 Power LED (b)
3 Factory reset button
4 DMZ LED
5 SPIS_N
6 SPID
7 SPIC
8 LED (not populated but could be)
9 Wireless-G LED
10 PCI INTB
11 PCI INTA
12 SPIQ
13 PCI reset
14 PCI clock
15 IXP expansion bus clock

Specific Configuration

Interfaces

The default network configuration is:

Interface Name Description Default configuration
eth0 LAN ports (1 to 4) 192.168.1.1
eth1 WAN port DHCP

Buttons

There is one reset button.

Hardware mods

The WRV54G has a second unpopulated mini-PCI connector. It's possible to solder in an additional connector: http://www.flickr.com/photos/24017027@N00/199751093/


toh/linksys/wrv54g.txt · Last modified: 2012/04/20 23:25 by falcon_1