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--- toh:tp-link:tl-wr542g [2012/11/17 12:18]
jow remove paid links
+++ toh:tp-link:tl-wr542g [2016/08/14 21:27] (current)
xssa [Installation of VxKiller-Image]
@@ Line 1: / Line 1: @@
+====== TP-Link TL-WR542g ======
+This is a quite cheap 802.11g soho router. Due the small amount of flash and RAM it cannot be offically supported by OpenWrt.There is no way to flash PRODUCTION OpenWrt firmware through TP-Link's WEB directly, because of the limitation that it can accept only images less then 1179648 bytes long(hardcoded in firmware) so to get over this problem a vxkiller image (Backfire10.3 stripped heavily with MicroRedboot bootloader adapted for 2mb flash and 16mb ram) was developed by member xssa from forum
+any questions releated to debuging please refer to the forum
+https://forum.openwrt.org/viewtopic.php?id=17252&p
+===== Supported Versions =====
+^ Version/Model ^ Launch Date ^ S/N ^ OpenWrt Version Supported ^ Model Specific Notes ^
+| v?   |  20??-??  | - |  **not by any official firmware image**  | similar to [[toh/tp-link/wr340gd]] |
+===== Hardware Highlights =====
+^ CPU ^ Ram ^ Flash ^ USB ^ Serial ^ JTag ^
+| Atheros AR2317  |  16MiB  |  2MiB  |  No  |  Yes  |  No  |
+===== Installation =====
+TP-Link's web interface has a hardcoded limitation that it only accepts images less then 1.179.648 Bytes long. So you cannot even use the entire space available for a OpenWrt build. But you can surpass this problem by flashing a special OpenWrt firmware image called "VxKiller" developed by xssa first, and only then the actual firmware.
+==== Installation of VxKiller-Image ====
+"VxKiller" is a heavily stripped OpenWrt Backfire 10.03 with MicroRedboot bootloader adapted for 2MiB flash and 16MiB RAM. There is
+  * no working DHCP server
+  * no wireless driver
+  * no WebUI
+  * no SSH daemon
+  * no writable RootFS
+on this image. Its only purpose is to fit into the specs that the TP-Link's web interfaces accepts.
+**''Note:''** This VxKiller was originally developed for the TP-LINK WR340G router which is the same hardware as the WR542G excluding the 16MB ram found in the wr542g
+  - download special OpenWrt Image "VxKiller" by XSSA: http://www.4shared.com/folder/cUkhCEJf/vxkiller.html
+  - upgrade your TL-WR542G with the "wr340v5_linux.bin" (vxkiller) through TP-Link's web interface. After second reboot you can telnet 192.168.1.1 to VxKiller firmware
+==== Installation of full OpenWrt build ====
+|  **PREBUILT KERNEL AND ROOTFS MADE BY XSSA**  |
+|  username:root,password:ar2317  |
+  - download Kernel (custom load address for kernel is 80033800) http://www.4shared.com/file/QNM7HCW8/openwrt-atheros-vmlinux.html
+  - download RootFS (IP Address is 192.168.1.55  logon with root/ar2317) http://www.4shared.com/file/RbLcfmY1/rootsq.html
+  - connect to the bootloader ([[doc:techref:bootloader:RedBoot]]) and do <code>
+fis init      ( Erases Flash rom )
+ip_addr -h  ( ip of TFTP server )
+load -r -v -b %{FREEMEMLO} openwrt-atheros-vmlinux.lzma       ( loads kernel to ram )
+fis create -r 0x80033800 -e 0x80033800 vmlinux.bin.l7        ( Write's kernel to flash custom load address for kernel is 80033800 current kernel is 2.6 )
+fis free       ( calculate in hexadecimal base 16 next erase block by using bc bc in linux )
+load -r -v -b %{FREEMEMLO} openwrt-atheros-root.squashfs     ( loads kernel to ram )
+fis create -l 0x130000 rootfs         ( Write's to flash Default erase block addrees for xssa image )
+reset  ( Restart's router )
+</code>
+  - optionally do:<code>
+fis load -l vmlinux.bin.l7     ( for loading kernel from flash to ram  )
+exec      ( for executing kernel from ram )
+</code>
+===== WPA SUPPLICANT =====
+-> cf. [[doc:howto:wireless.overview]] and [[doc:howto:wireless.utilities]]
+  * **Only Routed Client Mode works with the rootfs and kernel given here as dhcp server(dnsmasq) and firewall is not included in this build to save space**
+  * **Remember:Client Bridge is not supported by atheros chipset by default due to the driver's limitation**
+Okay the rootfs and kernel you flashed to your router does not have opkg package system nor does it have wpa-supplicant preinstalled but there is another way to put wpa supplicant in the current build in the form of a binary
+**Instructions are**
+Download the wpa supplicant binary from this link
+http://www.4shared.com/file/yBT313LX/wpa_supplicant.html
+after this put this binary on any available
+ftp/http server, then download it to the /tmp directory onto your
+openwrt, add executable rights to it, and move it to the /usr/sbin
+(in windows use radienftp it is quite easy to setup)
+**Instruction : ** (in openwrt busybox issue following commands)
+#cd /tmp
+#wget ftp://user:pass@server_ip/wpa_supplicant
+#chmod +x wpa_supplicant (make it executable)
+#mv wpa_supplicant /usr/sbin
+after this just configure cd /etc/config/wireless with the ssid of the router u wan to connect followed by the password
+the corrrect syntax for wpa-psk
+config 'wifi-iface'
+        option 'device' 'wifi0'
+        option 'network' 'wan'
+        option 'mode' 'sta'
+        option 'key' '*********'
+        option 'txpower' '19'
+        option 'ssid' '**********'
+        option 'encryption' '' (encryption you chosse psk,psk1)
+**THIS METHOD WAS GIVEN BY XSSA THIS IS HIS BINARY**
+===== Hardware =====
+==== Info ====
+| **Architecture:** MIPS 4KEc V6.4 |
+| **Vendor:** Atheros |
+| **Bootloader:** TPLINK proprietary after vxkiller (MICRO REDBOOT) |
+| **System-On-Chip** Atheros AR2317  |
+| **CPU/Speed** 200 Mhz |
+| **Flash-Chip** Cfeon f16-100HIP SPI |
+| **Flash size** 2 MiB |
+| **RAM-chip**  EtronTech EM639165TS-6G |
+| **RAM:** 16 MiB |
+| **Wireless:** Atheros AR2317 802.11b/g (integrated)  |
+| **Ethernet:** Marvell 88E6060 switch |
+| **USB:** no |
+| **Serial** [[#Serial|Yes]] |
+| **JTAG:** No |
+==== Photos ====
+Model Number
+//Front://
+**Photo of front of the casing**
+//Back://
+**Photo of back of the casing**
+==== Opening the case ====
+**Note:** This will void your warranty!
+  *To remove the cover do a/b/c
+//Main PCB//
+**Photo of PCB**
+==== Serial ====
+There is an unsoldered 4 pin connector near the reset button. (Where the black, red, blue wires plugged on the picture.) The pinout is: 1: 3.3V (closest the the reset button) 2: GND 3: RX 4:TX
+Baud: 38400, 8n1
+===== To revert back to Vxworks =====
+Connect your router to your pc by ethernet cable, asign static IP to your PC - 192.168.1.10 netmask 255.255.255.0
+try to
+ping 192.168.1.1
+telnet 192.168.1.1
+<code>
+=== IMPORTANT ============================
+  Use 'passwd' to set your login password
+  this will disable telnet and enable SSH
+------------------------------------------
+BusyBox v1.15.3 (2010-04-26 19:06:00 EEST) built-in shell (ash)
+Enter 'help' for a list of built-in commands.
+  _______                     ________        __
+|       |.-----.-----.-----.|  |  |  |.----.|  |_
+|   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
+|_______||   __|_____|__|__||________||__|  |____|
+          |__| W I R E L E S S   F R E E D O M
+Backfire (10.03, r20974) --------------------------
+  * 1/3 shot Kahlua    In a shot glass, layer Kahlua
+  * 1/3 shot Bailey's  on the bottom, then Bailey's,
+  * 1/3 shot Vodka     then Vodka.
+---------------------------------------------------
+root@OpenWrt:/# vxrestore
++0 records in
++0 records out
++0 records in
++0 records out
+Unlocking radio ...
+Writing from /tmp/radio.rom to radio ...
+Unlocking board ...
+Writing from /tmp/mac.rom to board ...
+All eeprom stuff is done!
+Now for reverting back to VxWorks you need to:
+) prepare raw VxWorks image from correct firmware update image
+    by truncating first 20 bytes of it's header
+    Be CAREFULL - choosing wrong image will brick your device!!!
+) put raw image into working TFTP server directory, say vxworks.raw
+) restart your unit with pressed RESET key for !!!LESS then 5 sec!!!
+   be carefull, do not let to start this linux again because
+   it will revert board eeprom to linux version on restart
+) telnet to 192.168.1.1:9000
+) in RedBoot prompt do
+RedBoot> ^C
+RedBoot> ip_address -h 192.168.1.10
+IP: 192.168.1.1, Default server: 192.168.1.10
+RedBoot> load -r -b %{FREEMEMLO} vxworks.raw
+Using default protocol (TFTP)
+Raw file loaded 0x80033800-0x8010e587, assumed entry at 0x80033800
+RedBoot> fis write -b %{FREEMEMLO} -l 0x120000 -f 0xbfc00000
+* CAUTION * about to program FLASH
+ at 0xbfc00000..0xbfd1ffff from 0x80033800 - continue (y/n)? y
+carefully wait here about a one-two minute for complition
+... Erase from 0xbfc00000-0xbfd20000: ..
+... Program from 0x80033800-0x80153800 at 0xbfc00000:
+RedBoot>reset
+        enjoy old days of VxWorks
+</code>
+===== SD/MMC CARD MODD WIP gpio  =====
+**It** is possible to implement a sd/mmc card modd on this router as it has a spi flash chip and hence uses spi bus the limitation of space can be overcome by this modd. A special kernel and rootfs containing the neccessary package required for openwrt to boot and opkg package system followed by the kernel modules required for SD/MMC modd (mod-mmc, kmod-mmc-over-gpio, kmod-mmc-spi, kmod-spi-bitbang, and kmod-spi-gpio) so that a sd/mmc card can be mounted. after this all other kernel modules and packages can be downloaded to the memory card
+see the following post where similar setup has been done on same hardware
+https://forum.openwrt.org/viewtopic.php?id=25368 (sd/mmc mod of 512mb on a usrobotic router with only 2mb flash)
+http://tinyhack.com/2010/04/04/d-link-dir-300-serial-port-and-sd-mod/ (sd/mmc mod on a d-link dir-300 based on atheros ar2317 processor the same onw used in this router)
+**Remember**
+a total of  4 gpio pins are required for sd card modd
+Standard SD Card pinout
+sd card pinout
+    * Pin 2  (Data In/MOSI)
+    * Pin 7 (Data Out/MISO)
+    * Pin 5 in SD Card (CLK)
+    * Pin 1 in SD Card (Chip Select)
+Anyone who found gpio pins or have any info regarding this modd for this router post in the forum
+https://forum.openwrt.org/viewtopic.php?id=17252&p=8
+===== Tags =====
+{{tag>2Flash}}

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