[OpenWrt-Devel] oxnas target description for wiki on dev.openwrt.org

Daniel Golle daniel at makrotopia.org
Sat Dec 20 20:52:09 EST 2014


I reckon the following info should go to
and there should be a reference to that on

I love to edit the wiki myself, however, trac doesn't seem to allow
users to create new accounts. What to do? Does anyone who got access
to the wiki feel like adding this info?

oxnas | Oxford Semi. OX82x, PLXTECH NAS782{0,1} | ARM | little | Daniel | oxnas
>> https://dev.openwrt.org/wiki/platforms


supported SoCs: Oxford Semi. OX82x, PLXTECH NAS782{0,1}
maybe supported: PLXTECH NAS7825 (nowhere to be found in the wild afaik)
not supported: Oxford Semi. OX81x (obsolete, different core, different address layout)

architecture overview:
 2x ARM11MPCORE (ARMv7) core
 no PCIe on OX820/NAS7820, 1x PCIe on OX821/NAS7821, 2x PCIe on NAS7825
 up to 512MB DDR2 SDRAM
 NAND or SPI serial flash (128MiB NAND typically found in the wild)
 DesignWare/ST GigE core with GMII/RMGII
 EHCI USB 2.0 Host (USB gadget mode might be possible as well)
 OX934 single-DMA dual-port S-ATA controller (SoC supports JBOD and RAID0/1 in hardware, OpenWrt doesn't yet)
 2x DesignWare/Synopsis S-ATA phy
 Crypto engine (?)
 "LEON" (no, not a SPARC) co-processor usable for wake-on-LAN and maybe as a watchdog

 * originally developed at Oxford Semi
 * Oxford Semi acquired by PLXTECH, NAS products renamed
 * PLXTECH acquired by Avago, announced end-of-life for NAS products
 * however, Avago got bulk-agreement with Roychester...

known limitations:
 - vendor's U-Boot doesn't support booting modern kernels
   => chain-load a recent U-Boot which does
      This additional U-Boot stage uses UBI to load OpenWrt and stores it's environment in UBI
      In future, it may instead be feasible to replace the stock loader, kwboot-like serial recovery yet needs to be found...
      => PLL and SDRAM setup is board specific and needs to be taken care of if we want that

 - S-ATA core requires host-lock for port transfers
   => S-ATA performance sucks when using both drivers simultanously e.g. for RAID-1
      vendor's Linux SDK uses hardware-supported RAID and JBOD, OpenWrt doesn't (yet)

 - no USB gadget support

 - Crypto engine undocumented/unsupported in all known GPL drops, no support in OpenWrt

 - LEON microcode loading not yet implemented, thus no watchdog and wake-on-lan

 - no decent hddtemp-driven fancontrol for devices with fan implemented in OpenWrt


k=known backdoor
i=installer/flash image available
h=how-to available
s=serial access required for installation
?=missing fdt, please get in touch if you got that board/device

stg-212   : ZyXEL NSA-212 / MitraStra STG-212 / Medion ...     : k,h : http://wiki.openwrt.org/toh/medion/md86587
pogoplug* : Cloud Engines PogoPlug v3/Pro                      : k,s :
kd20      : Shuttle KD20                                       : h,s :
ch3hnas2  : Conceptronic CH3HNAS2                              : ?   :
em4172    : Eminent EM4172                                     : ?   :
hmnhdcd   : iomega Home Media Network Hard Drive Cloud Edition : ?   :
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org

More information about the openwrt-devel mailing list