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toh:netgear:wnr854t [2012/11/09 20:14]
chickenandporn URL fix for trunk->backfire
toh:netgear:wnr854t [2015/12/20 10:24] (current)
tmomas ↷ Links adapted because of a move operation
Line 1: Line 1:
 +====== Netgear WNR854T ======
  
 +===== Update 2015-03-30 =====
 +Candidate for "​legacy"​ or "​notfullyworking"​ status.
 +
 +https://​forum.openwrt.org/​viewtopic.php?​pid=270546#​p270546
 +
 +===== Supported Versions =====
 +^ Version/​Model ^ S/N ^ OpenWrt Version Supported ^ Model Specific Notes ^
 +| [[http://​kb.netgear.com/​app/​products/​model/​a_id/​2619|WNR854T]] | PY306200049 ​ | 10.03 | MiniPCI Wifi Card (big size) with 2 soldered points|
 +
 +===== Hardware Highlights =====
 +^ CPU               ^ Ram    ^ Flash   ^ Network ​    ^ USB   ^ Serial ​  ^ JTag   ^
 +| ARMv5TEJ@500MHz ​  | 32MB   | 8MB     | 5 x 1 gbE   | No    | Yes      | Yes    |
 +
 +T:Thumb
 +E:Enhanced DSP Extensions
 +J:​[[http://​hackipedia.org/​Hardware/​CPU/​arm/​ARMv5%20Architecture%20Reference%20Manual.pdf.raw-conversion.utf-8.txt|Jazelle]] (Java opt)
 ++
 +L:Little Endian
 +
 +===== Installation =====
 +
 +It is adviced to have a working [[.:​wnr854t#​Serial|serial]] cable and a terminal program ready in case a recovery via U-Boot is required.
 +
 +This section deals with how you install OpenWrt from a device freshly opened. ​ Plus the steps required such as reset to factory defaults if the device has already been configured
 +
 +  * Download http://​backfire.openwrt.org/​10.03/​orion/​openwrt-wnr854t-squashfs-webupgrade.img
 +  * Please note somewhere your current Mac Adresses (for LAN, WAN and Wifi), or export your current config.
 +  * Open the firmware update page at http://​192.168.1.1/​UPG_upgrade.htm
 +  * Upload ''​openwrt-wnr854t-squashfs-webupgrade.img''​
 +  * Wait until the device reboots
 +  * Telnet to 192.168.1.1 and set a root password
 +  * opkg update
 +  * opkg install luci
 +  * /​etc/​init.d/​uhttpd enable
 +  * /​etc/​init.d/​uhttpd start
 +  * Browse to http://​192.168.1.1
 +
 +==== Upgrading OpenWrt ====
 +
 +Sysupgrade is supported on the WNR854T.
 +
 +== LuCI Web Upgrade Process ==
 +
 +  * Browse to the System -> Flash Firmware page
 +  * Upload ''​openwrt-orion-squashfs.img''​
 +  * Wait for reboot
 +
 +== Terminal Upgrade Process ==
 +
 +  * Login as root via SSH on 192.168.1.1
 +  * Use the following commands to upgrade.
 +
 +<​code>​
 +cd /tmp/
 +wget http://​downloads.openwrt.org/​snapshots/​trunk/​orion/​openwrt-orion-squashfs.img
 +sysupgrade /​tmp/​openwrt-orion-squashfs.img
 +</​code>​
 +
 +===== Hardware =====
 +| **Architecture:​** ARM 926 (v5TEJ) ​        |
 +| **Vendor:** Marvell Feroceon (Orion-1*) ​  |
 +| **System-On-Chip:​** MV88F5181 (Rev B1)    |
 +| **Bootloader:​** U-Boot ​                   |
 +| **CPU Speed:** 500 Mhz                    |
 +| **Flash-Chip:​** Intel JS28F640 ​           |
 +| **Flash size:** 8 MiB                     |
 +| **RAM:** 2 x Nanya NT5DS8M16FS-5T (32 MiB)                   |
 +| **Wireless:​** Marvell 88W8361P-BEM1 802.11b/g/n (mini-PCI) ​  |
 +| **Switch:** [[http://​www.marvell.com/​products/​switching/​linkstreet/​|Marvell 88E6131-LAR1]] |
 +| **Ethernet:​** 2 x 88E1112 GbE PHY      |
 +| **USB:** CPU Support but no pinout ?   |
 +| **Serial:** [[.:​wnr854t#​Serial|Yes]] ​  |
 +| **JTAG:** [[.:​wnr854t#​JTAG|Yes]] ​      |
 +
 +This SoC does **not** support Marvell CESA (Cryptographic Engines and Security Accelerator)
 +
 +===== Photos =====
 +
 +{{media:​netgear:​wnr854:​wnr854t-enclosure.jpg}}
 +
 +==== Opening the case ====
 +
 +Remove one of the two screws under the box (the one on the right side) and open the right side case.
 +There is a third screw under the serial sticker which can be kept untouched.
 +
 +{{media:​netgear:​wnr854:​wnr854t_board_annotated.jpg|}}
 +
 +{{media:​netgear:​wnr854:​wnr854t.jpg?​800x600|WNR854T}}
 +
 +===== Serial =====
 +This model has an unpopulated 9-pin header that exposes a 3.3V serial port. Some pins are listed below (Board view, component side):
 +|   Pin 1 |  Tx  |  3.3V  | Pin 2   |
 +|   Pin 3 |      |  3.3V  | Pin 4   |
 +|   Pin 5 |      |  GND   | Pin 6   |
 +|   Pin 7 |  Rx  |  GND   | Pin 8   |
 +|   Pin 9 |      |        |         |
 +
 +{{media:​netgear:​wnr854:​wnr854t_serial.jpg?​direct&​300|}}
 +
 +Serial connection parameters are : 115200,8N1
 +
 +Working very nice with CP2102 USB-to-UART USB bridge (dual voltage 3.3V / 5V)
 +Connect only RX TX and GND pins
 +
 +Can recover your device if reset doesn'​t works, just type ENTER and you are connected to the Shell.
 +
 +==== TFTP Boot with Serial Console ====
 +
 +You can press ENTER with a serial terminal on boot to access UBOOT menu
 +
 +Check ip of router and server with **printenv** in uboot 
 +Default server address is set to 192.168.1.2
 +
 +Prepare a FTPD server with a Kernel Image (atftpd is easy to setup) ​
 +then type :
 +| <​code>​
 +Marvell>>​ tftpboot 0x400000 openwrt-wnr854t-uImage
 +Marvell>>​ bootm 0x400000</​code>​ |
 +**tftpboot** load the kernel image from network to memory and **bootm** will execute it.
 +
 +If your flashed kernel is broken, and the bootm procedure is working, you can flash this kernel.
 +Here is the procedure :
 +| <​code>​
 +Marvell>>​ tftpboot 0x400000 openwrt-wnr854t-uImage
 +TFTP from server 192.168.10.110;​ our IP address is 192.168.10.190
 +Filename '​openwrt-wnr854t-uImage'​.
 +Load address: 0x400000
 +Loading: #################################################################​
 +         #################################################################​
 +         ###################################################​
 + done
 + Bytes transferred = 923332 (e16c4 hex)   <<<​ NOTE the kernel hex size here
 +
 +Marvell>>​ protect off 0xff800000 0xff8fffff
 + ​Un-Protected 8 sectors
 +Marvell>>​ erase 0xff800000 0xff8fffff
 + ​Erased 8 sectors
 +Marvell>>​ cp.b 0x400000 0xff800000 0xf0000
 + Copy to Flash... done
 +Marvell>>​ protect on 0xff800000 0xff8fffff
 + ​Protected 8 sectors
 +Marvell>>​ reset</​code>​ |
 +
 +Then, if your filesystem is also broken, kernel will stop with a "Not Syncing error"​.
 +
 +You can also flash the kernel + the rootfs in a single command :
 +| <​code>​
 +Marvell>>​ tftpboot 0x400000 openwrt-wnr854t-squashfs.img
 +Bytes transferred = 2621440 (280000 hex)
 +Marvell>>​ erase 0xff800000 0xffafffff
 +Marvell>>​ cp.b 0x400000 0xff800000 0x280000
 +</​code>​ |
 +
 +===== JTAG =====
 +
 +CON3 (2x5 pins, close to the miniPCI slot) is the JTAG connector ([[http://​forum.openwrt.org/​viewtopic.php?​pid=58440#​p58440|forum post]]):
 +|   Pin 1 |  Vcc   ​| ​ nTRST  | Pin 2    |
 +|   Pin 3 |  GND   ​| ​  ​TDI ​  | Pin 4    |
 +|   Pin 5 |  GND   ​| ​  ​TMS ​  | Pin 6    |
 +|   Pin 7 |  TDO   ​| ​  ​TCK ​  | Pin 8    |
 +|   Pin 9 |  sRST  |  RTCK   | Pin 10   |
 +
 +The posting claims that OpenOCD works for this device.
 +
 +{{media:​netgear:​wnr854:​wnr854t_jtag.jpg?​direct&​300|}}
 +
 +You can find more informations about JTAG interface on similar marvell platforms : [[http://​www.plugcomputer.org/​index.php/​us/​resources/​downloads?​|SheevaPlug & GuruPlug]]
 +
 +===== Interfaces =====
 +The default network configuration is:
 +^ Interface Name   ^ Description ​         ^ Default configuration ​  ^
 +| br-lan ​          | LAN & WiFi           | 192.168.1.1/​24 ​         |
 +| lanX             | LAN ports (1 to 4)   | br-lan ​                 |
 +| wan              | WAN port             | DHCP                    |
 +| wlan0            | WiFi                 | Disabled ​               |
 +
 +===== Switch =====
 +
 + The following list is a sub-set of the capabilities of the 88E6131 Switch IC'​s: ​
 + 
 +  * Egress tagging/​untagging - selectable per port or by 802.1Q VLAN ID 
 +  * Port Based VLANs - supported in any combination or 802.1 VLAN support for 4096 VIDs 
 +  * Port States and BPDU handling for spanning tree 
 +  * 802.1X Source MAC address authentication ​
 +  * Quality of Service - switch architecture provides non-blocking switching in all traffic environments ​
 +  * Link Aggregation (802.3ad) - allows two or more links to be trunked to increase the total bandwidth and provide a fail safe if one of the links fails 
 +  * A high speed, non-blocking,​ QoS switch fabric with support for four traffic classes based on: 
 +    * Port
 +    * IEEE 802.1p ​
 +    * IPv4’s TOS or Diff-Serv ​
 +    * IPv6’s Traffic Class 
 +    * 802.1Q VID 
 +    * DA MAC address ​
 +    * SA MAC Address
 +  * Back-pressure flow control on half-duplex ports 
 +  * Pause-frame flow control on full-duplex ports 
 +  * Lookup engine supports 1024 MAC address entries with learning and aging 
 +  * Auto-MDI/​MDIX and polarity correction ​
 +
 +===== Wifi Card =====
 +
 +The included Marvell Draft N mini-pci card is not supported, there is a module named [[http://​git.marvell.com/?​p=mwl8k.git;​a=summary|mwl8k]] for it, which is under development in drivers/​net/​wireless/​ (We need a working fmimage_8361.fw, ​
 +fmimage_8363.fw is shipped with linux, but 61 doesnt work with it).
 +
 +We recommand Atheros [[http://​www.greenmoore.fi/​tiedostot/​Mini-PCI%20Module/​SparkLAN/​WMIA-207GN/​WMIA-207GN.pdf|AR5416]]/​5008 (BGN) and AR9160 (ABGN) (both uses ath9k module) wifi cards which are fully compatible : 3 antennas and Front wifi Led support.
 +
 +
 +[[http://​www.netcare.com.hk/​photos/​pdf/​93/​pdf_1.pdf|AR5414A]]/​5006XS (ABG 108Mb) is also working fine with madwifi module but doesn'​t have led support and wifi options are not fully supported by LuCi web interface.
 +There are some problems with the ath5k module, about a "​unable to warm reset MAC" on the current build and led doesn'​t works (Feb 2011)
 +
 +[[http://​www.ipmedia.cz/​img.asp?​attid=655|AR5213A]] (ABG 108Mb) is working too with madwifi module (led is not linked too).
 +
 +You can enable/​disable the wifi led with io package (tested on atheros 5213A):
 +
 +''​root@OpenWrt:/#​ io -w 0xe8004014 4
 +root@OpenWrt:/#​ io -w 0xe8004014 0''​
 +
 +Where 0xe8000000 is the base address of Atheros Card (check dmesg)
 +
 +''​ath_pci:​ wifi0: Atheros 5212: mem=0xe8000000,​ irq=36''​
 +
 +===== Buttons and Leds =====
 +The device has one reset button.
 +
 +^ BUTTON ​  ^ Event   ^
 +| Reset    | reset   |
 +
 +The button handling is not currently in "​Trunk",​ here are some links to implement it with **kmod-button-hotplug** or with a direct interrupt :
 +
 +  * [[https://​dev.openwrt.org/​ticket/​8729|Kernel Patch for Leds and Button handling]]
 +  * [[http://​patchwork.cyranjo.org/​patch/​647/​|Hotplug Button script and dependencies]] (Link down)
 +
 +The two firsts leds (green) are also added with this patch and will add led interfaces in /​sys/​class/​leds
 +
 +The LAN leds are not controlled by CPU GPIOs, and Wifi LED is linked to the MiniPCI Led Pin 11 (which is a Wifi Card controlled GPIO)
 +
 +===== Hardware mods =====
 +
 +Nothing to report except you can change MiniPCI Card.
 +
 +===== Other Info =====
 +
 +==== Fix the GLOD (Green light of death) problem ====
 +
 +Apparently some WNR854T suffer from a problem where the device suddenly breaks down (after a couple of weeks or months), and only the power LED remains on.
 +
 +See the [[toh:​netgear:​wnr854t:​glod|Fix a WNR854T with the GLOD Problem]] article for hardware fix. But before doing something like that, please try another 12V Power Unit.
 +
 +==== Web Links ====
 +
 +  * Flashing guide in the forum: https://​forum.openwrt.org/​viewtopic.php?​pid=93330#​p93330
 +  * Marvell 88F5xx81 support thread: https://​forum.openwrt.org/​viewtopic.php?​id=12358
 +
 +  * Orion GIT : http://​git.kernel.org/?​p=linux/​kernel/​git/​nico/​orion.git
 +  * Marvell'​s GIT (Linux support for the Marvell Orion SoC family): http://​git.marvell.com/?​p=orion.git;​a=summary
 +  * Netgear GPL sources : http://​kb.netgear.com/​app/​answers/​detail/​a_id/​2649/​~/​gpl-open-source-code-for-programmers
 +
 +  * Tanguy'​s [[http://​tanguy.wdscript.fr/?​q=wnr854t|WNR854T page]]
 +
 +==== Similar Devices ====
 +
 +  * Link to the [[toh:​linksys/​wrt350nv2|WRT350Nv2]] which use same orion platform (v2 only) (88F5181L SoC)
 +  * [[http://​www.abcsolutions.lv/​openwrt/​freecom-dt2/​|Freecom DT2]] NAS Router on a 88F5182 SATA Platform. Nice page with some openwrt packages.
 +  * [[http://​www.wikidevi.com/​wiki/​D-Link_DIR-665_A1|DIR-665 A1]] which uses marvell successor cpu (Kirkwood 88F6281)
 +
 +==== DataSheets ====
 +
 +  Unable to find the MV88F5181 Datasheet, here are the datasheets for the MV88F5182 :
 +
 +  * [[http://​tpruvot.free.fr/​files/​MV88F5182-datasheet.pdf|Marvell MV88F5182 SoC Datasheet]]
 +  * [[http://​tpruvot.free.fr/​files/​MV88F5182-opensource-manual.pdf|Marvell MV88F5182 Opensource Manual]]
 +  * [[http://​tpruvot.free.fr/​files/​MV88F5182-usermanual.pdf|Marvell MV88F5182 User Manual]]
 +
 +  The MV88F5281 seems closer to the MV88F5181 (same number of gpios)
 +  There is also the Chip Pinout in this datasheet :
 +
 +  * [[http://​tpruvot.free.fr/​files/​MV88F5281-datasheet.pdf|Marvell MV88F5281 SoC Datasheet]]
 +
 +==== Open tickets ====
 +Nice to have patches when compiling from source yourself.
 +  * [[https://​dev.openwrt.org/​ticket/​7209#​comment:​5|#​7209]] [[https://​dev.openwrt.org/​attachment/​ticket/​7209/​mwl8k_8361p.patch|patch]] Upsteamable patch to mwl8k.
 +  * [[https://​dev.openwrt.org/​ticket/​8160|#​8160]] [[https://​dev.openwrt.org/​attachment/​ticket/​8160/​wnr854t_gpios.patch|patch]] LEDs and input support. Test with [[https://​forum.openwrt.org/​viewtopic.php?​pid=120182#​p120182|diag.sh]].
 +  * [[https://​dev.openwrt.org/​ticket/​8183#​comment:​5|#​8183]] [[https://​dev.openwrt.org/​attachment/​ticket/​8183/​trunk_orion_flexible_kernel_mtd_support.patch|patch]] Allow flexible kernel mtd sizes.
 +  * [[https://​dev.openwrt.org/​ticket/​8325|#​8325]] [[https://​forum.openwrt.org/​viewtopic.php?​pid=131020#​p131020|patch]] Mirror bridge switch configuration from software to hardware.
 +  * [[https://​dev.openwrt.org/​ticket/​8729|#​8729]] [[https://​dev.openwrt.org/​ticket/​8729|patch]] Leds, button and board id
 +  * [[http://​www.mail-archive.com/​linux-crypto@vger.kernel.org/​msg03696.html|patch]] DMA for Marvell CESA.
 +
 +==== OpenSSL Benchmarks ====
 +Same procedure as [[doc:​howto:​benchmark.openssl|here]] just to test hardware cryptographic engine presence or absence.
 +<​sortable 6=numeric 7=numeric 8=numeric 9=numeric 10=numeric 11=numeric 12=numeric 13=numeric 14=numeric 15=numeric 16=numeric 17=numeric 18=numeric >
 +^ OpenWRT Version ^ Features code ^ OpenSSL Version ^ MD5 ^ SHA-1 ^ SHA-256 ^ SHA-512 ^ DES ^ 3DES ^ AES-128 ^ AES-192 ^ AES-256 ^ RSA Sign ^ RSA Verify ^ DSA Sign ^ DSA Verify ​ ^
 +| Attitude r25661 | default libopenssl oC | 1.0.0d |  26144300 |  7654230 |  5116210 |  1558070 |  4094630 |  1445240 |  2511210 |  2128140 |  1873440 |  5.1 |  191.7 |  19.3 |  15.9 |
 +| Attitude r26358 | accelerated libopenssl OaAfbdDhHxXmMcCsSTU | 1.0.0d |  21206450 |  7789990 |  5474620 |  1647680 |  3339680 |  1182570 |  4511460 |  4581880 |  4087070 |  5.8 |  204.8 |  20.4 |  16.7 |
 +| r26588 | only kmod-crypto-hash Oh | 1.0.0d |  21976010 |  7905690 |  5491800 |  2373350 |  3337420 |  1188390 |  5577360 |  4867940 |  4359760 |  5.8 |  205.2 |  20.6 |  16.8 |
 +| r26588 | only kmod-crypto-hash,​ sha1, md5 kernel modules OChsm | 1.0.0d |  22273550 |  7945620 |  5482870 |  2359650 |  3345180 |  1189280 |  5565680 |  4875680 |  4351140 |  5.8 |  204.6 |  20.6 |  16.7 |
 +| r26588 | all kmod crypto OCahsmx | 1.0.0d |  23025910 |  7937200 |  5468980 |  2371300 |  3304450 |  1188050 |  4118600 |  3218580 |  2857920 |  5.8 |  205.7 |  20.7 |  16.8 |
 +| r26588 | kmod mv_cesa + kmod aes OCca | 1.0.0d |  22025970 |  7871740 |  5465690 |  2359320 |  3299060 |  1191220 |  4608690 |  4000820 |  3556600 |  5.8 |  205.1 |  20.6 |  16.8 |
 +</​sortable>​
 +
 +=== Codified features list ===
 +  * o default libopenssl, O [[doc:​howto:​benchmark.openssl#​enable.hardware.acceleration|compiled with]] crypto acceleration support
 +  * a menuconfig kmod-crypto-aes,​ A kernel_menuconfig AES cipher algorithms
 +  * f menuconfig kmod-crypto-arc4,​ F kernel_menuconfig ARC4 cipher algorithm
 +  * b menuconfig kmod-crypto-cbc,​ B kernel_menuconfig CBC support
 +  * d menuconfig kmod-crypto-des,​ D kernel_menuconfig DES and Triple DES EDE cipher algorithms
 +  * h menuconfig kmod-crypto-hash,​ H kernel_menuconfig HASH
 +  * x menuconfig kmod-crypto-hmac,​ X kernel_menuconfig HMAC support
 +  * m menuconfig kmod-crypto-md5,​ M kernel_menuconfig MD5 digest algorithm
 +  * c menuconfig kmod-crypto-mv-cesa,​ C kernel_menuconfig (default) Marvell'​s Cryptographic Engine
 +  * s menuconfig kmod-crypto-sha1,​ S kernel_menuconfig SHA1 digest algorithm
 +  * T kernel_menuconfig SHA224 and SHA256 digest algorithm
 +  * U kernel_menuconfig SHA384 and SHA512 digest algorithms
 +
 +==== U-Boot default environment ====
 +You can change default Mac-address in u-boot environment,​ with **setenv ethaddr 12:​34:​56:​78:​51:​81** and then **saveenv**.
 +
 +Here is the default one, if you lose it :
 +
 +| <​code>​baudrate=115200
 +loads_echo=0
 +ipaddr=192.168.1.1
 +serverip=192.168.1.2
 +rootpath=/​mnt/​ARM_FS/​
 +cpuName=926
 +uboot_ver=v1.08 GE RT
 +CASset=min
 +MALLOC_len=4
 +ethprime=egiga0
 +bootargs_root=root=/​dev/​nfs rw
 +bootargs_end=:::​DB88FXX81:​eth0:​none
 +image_name=uImage
 +bootargs=console=ttyS0,​115200
 +ethaddr=00:​00:​00:​00:​51:​81
 +usb0Mode=host
 +stdin=serial
 +stdout=serial
 +stderr=serial
 +enaMonExt=no
 +enaFlashBuf=yes
 +enaCpuStream=no
 +bootargs2=$(bootargs)
 +standalone=fsload 0x400000 $(image_name);​setenv bootargs $(bootargs) root=/​dev/​mtdblock1 rw ip=$(ipaddr):​$(serverip)$(bootargs_end);​ bootm 0x400000;
 +bootcmd=fsload 0x400000 $(image_name);​setenv bootargs $(bootargs) root=/​dev/​mtdblock1 rw ip=$(ipaddr):​$(serverip)$(bootargs_end);​ bootm 0x400000;
 +bootnfs=fsload 0x400000 $(image_name);​setenv bootargs $(bootargs) root=/​dev/​mtdblock1 rw ip=$(ipaddr):​$(serverip)$(bootargs_end);​ bootm 0x400000;
 +bootdelay=3
 +disaMvPnp=no
 +overEthAddr=no
 +ethact=egiga0
 +</​code>​ |
 +
 +
 +===== Similar Hardware =====
 +(dump from oldwiki)
 +
 +The hardware in this router is very similar to the [[:​toh:​Buffalo:​WZR_AG300|Buffalo WZR-AG300]],​ although that has two N cards and the user space differs. However, the Airlink 101 AR625W is a carbon of this router, and is identical in almost every detail.
 +
 +The board is labeled as //​WRTM-177GN_V01//​.
 +It contains:
 +  * a Marvell 88F5180NB1 (under a black heatsink).
 +  * a Marvell 88E6131-LAR1 (black heatsink).
 +  * two Marvell 88E1112 GbE PHY (small silver heatsink). They seems to be connected to the rightmost Ethernet ports.
 +  * two Nanya NT5DS8M16FS-5T RAM IC (one on each side of the PCB).
 +  * an Intel JS28F640 flash
 +  * an ALVCH162260 (close to the flash above)
 +  * an oversized miniPCI card containing a Marvell 88W8361P-BEM1 (stepping A3P) and an Etrontech EM638325TS-6G (RAM?). It's got its own FCC ID: PY306200049.
 +
 +The PCB layout is similar to the [[http://​www.sparklan.com.tw/​data/​prod_data/​108/​prod_data.pdf|Sparklan WRTM-320]] except for the voltage regulators.
 +
 +===== Tags =====
 +[[meta:​tags|How to add tags]]
 +{{tag>​GigabitEthernet 2NIC 1WNIC 5Port 0USB JTAG Serial MiniPCI 802.11bgn MV88W8361P mwl8k 3Ant NonDetachableAntenna 32RAM 8Flash ARM ARMv5 MV88F5181 marvell orion crypto}}