The Linksys WAG200G, and its EU variant (WAG200G-EU), is an ADSL 2+ home gateway which integrates a 4 port switch and an 802.11G wireless acccess point.

• ADSL 1/2/2+ support (up to 24Mbps)
• 4 10/100 Ethernet port switch
• IEEE 802.11b/g compliant

The router is based on the Texas Instruments AR7 platform (AR7WRD) which features an integrated MIPS(TM)-based 32-bit RISC core, a digital signal processor-based trans- ceiver and an ADSL Analog Front-End (AFE).

Picture of the board (as reported in [1]):

The AR7 integrates a dual 16550 UART for remote console: on of the two is accessibile via the 4-pin header (which need to be soldered) (1 in the following picture under the barcode sticker)

The pin layout is:

1 GND (black wire on the photo)
2 TX (white wire on the photo)
3 Vcc (red wire on the photo)
4 RX (blue wire on the photo)

Note that a voltage level adapter need to be done before attaching the pin to the PC serial port. I have successfully attached the serial console as described here (MAX232. Settings are 115200,8,N,1.). You cannot plug directly those pins to your pc serial port. You need a RS232-TTL level adapter.

See OpenWrtDocs/Customizing/Hardware/Serial_Console I actually used

The AR7 JTAG connector is JPXX (2 in picture) The pinout and specifications are the same of others AR7 devices that is 14 ping ejtag 2.6.

The pinout is the following:

nTRST 1  2   GND
TDI   3  4   GND
TDO   5  6   GND
TMS   7  8   GND
TCK   9  10  GND
nSRST 11 12  n/a
n/a   13 14  Vcc

You can use Hairydairymaid Debrick Utility with a Xilinx cable.

* ADAM2 boot loader

* Linux kernel version 2.4.17 ( in Linksys version 1.00.07 )

* squashfs filesystem for main software image

* 64Kb, flash based NVRAM ( as in ohter ADAM2 based devices )

* precompiled, binary-only kernel modules for AR7, DSL, WLAN and onboard LED's.

# ls /dev/mtdblock/
/dev/mtdblock/0 /dev/mtdblock/2 /dev/mtdblock/4
/dev/mtdblock/1 /dev/mtdblock/3 /dev/mtdblock/5

# cat mtd
dev: size erasesize name
mtd0: 002d0000 00010000 "mtd0"
mtd1: 000b0000 00010000 "mtd1"
mtd2: 00020000 00010000 "mtd2"
mtd3: 00010000 00010000 "mtd3"
mtd4: 00010000 00010000 "mtd4"
mtd5: 00040000 00010000 "mtd5"

# cat cpuinfo
processor : 0
cpu model : MIPS 4KEc V4.8
BogoMIPS : 211.35
wait instruction : no
microsecond timers : yes
extra interrupt vector : yes
hardware watchpoint : yes
VCED exceptions : not available
VCEI exceptions : not available

# cat sys/dev/adam2/environment
maca 00:14:bf:6f:81:b2
macb 00:14:bf:6f:81:b3
memsize 0x01000000
flashsize 0x00400000
modetty0 115200,n,8,1,hw
modetty1 115200,n,8,1,hw
bootserport tty0
cpufrequency 211968000
sysfrequency 105984000
bootloaderVersion 0.22.02
ProductID WAG200G
HWRevision Unknown
SerialNumber none
my_ipaddress 169.254.87.1
prompt WAG200G
firstfreeaddress 0x9401bd20
req_fullrate_freq 125000000
mtd0 0x900d0000,0x903a0000
mtd1 0x90020000,0x900d0000
mtd2 0x90000000,0x90020000
mtd3 0x903e0000,0x903f0000
mtd4 0x903f0000,0x90400000
mtd5 0x903a0000,0x903e0000
oam_lb_timeout 100

# cat partitions
major minor #blocks name

31 0 2880 mtdblocka
31 1 704 mtdblockb
31 2 128 mtdblockc
31 3 64 mtdblockd
31 4 64 mtdblocke
31 5 256 mtdblockf

# cat meminfo
total: used: free: shared: buffers: cached:
Mem: 14581760 12328960 2252800 0 1191936 4251648
Swap: 0 0 0
MemTotal: 14240 kB
MemFree: 2200 kB
MemShared: 0 kB
Buffers: 1164 kB
Cached: 4152 kB
SwapCached: 0 kB
Active: 1060 kB
Inactive: 5336 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 14240 kB
LowFree: 2200 kB
SwapTotal: 0 kB
SwapFree: 0 kB

# cat tty/driver/serial
serinfo:1.0 driver:5.05c revision:2001-07-08
0: uart:16550A port:A8610E00 irq:15 baud:7944 tx:6225 rx:0 RTS|DTR
1: uart:unknown port:A8610F00 irq:16

# cat wlan/hal/acxParams
-------- ConfigOptionsFixed ----------
NVSVersion = 04 1b 06 00 12 00 00 06
ProductId =
ManufactureId =
dot11MacAddress = 00:00:53:90:2c:dc
ProbeDelay = 17
EndofMemory = 0x1010104
dot11CCAModeSupported = 0
dot11DiversitySupport = 5
dot11ShortPreambleOptionImplemented = 1
dot11PBCCOptionImplemented = 6
dot11ChanneAgilityPresent = 0
dot11PHYType = 2
dot11TempType = 1
-------- ACX100 elements ----------
AntennaList (0) =
SupportedPowerLevels (2) = 0x1e00 0xa00
SupportedDataRates (5) = 0x02 0x04 0x11 0x22 0x44
SupportedRegDomains (0) =

# ps -ef
PID Uid VmSize Stat Command
1 root 288 S init
2 root SW [keventd]
3 root SWN [ksoftirqd_CPU0]
4 root SW [kswapd]
5 root SW [bdflush]
6 root SW [kupdated]
7 root SW [mtdblockd]
29 root 196 S /usr/sbin/download
43 root 220 S /usr/sbin/utelnetd -p 23 -d
45 root 224 S /sbin/klogd
55 root 484 S wpa_auth
65 root 284 S /sbin/syslogd -f /etc/syslog.conf
74 root 176 S /usr/sbin/ntp -t 3600 -z GMT-8
81 root 252 S /usr/sbin/mini_httpd -d /www -r Linksys WAG200G -c *
88 root 224 S /usr/sbin/crond
90 root 172 S /usr/sbin/scfgmgr
92 root 204 S /usr/sbin/atm_monitor
96 root 168 S /usr/sbin/cmd_agent_ap
97 root 168 S /usr/sbin/pb_ap
98 root 160 S /usr/sbin/wizd
116 root 716 S /usr/sbin/upnpd nas0 br0 30 4
118 root 348 S -sh
119 root 716 S /usr/sbin/upnpd nas0 br0 30 4
120 root 716 S /usr/sbin/upnpd nas0 br0 30 4
122 root 716 S /usr/sbin/upnpd nas0 br0 30 4
123 root 716 S /usr/sbin/upnpd nas0 br0 30 4
124 root 716 S /usr/sbin/upnpd nas0 br0 30 4
142 root 716 S /usr/sbin/upnpd nas0 br0 30 4
21465 root 416 S -sh
21993 root 292 R ps -ef

# lsmod
Module Size Used by
tiap 843072 1
led 3880 0
push_button 1544 1
tiatm 122440 0

Here you can find most of the hardware and software details of the WAG200G-EU: http://woytekm.googlepages.com/linksyswag200g-eu

http://www.linux-mips.org/wiki/AR7#AR7

http://ar7.wikispaces.com/

http://archive.seattlewireless.net/index.cgi/ADAM2

CategoryAR7Device