Fernvale¶

"Fernvale is an open-source development platform for the Mediatek MT6260." - from https://kosagi.com/w/index.php?title=Fernvale_Main_Page

It is available on the sysmocom web-shop

TODOs¶

• port Layer1bin - unrznbl is working on this currently
• create library from osmocom-bb to be used in NuttX layer1 app (hopefully very little copying of code into nuttx tree)
• port Mobile to NuttX

Progress¶

Apr 22 2018 - layer1 firmware has stubbed out implementations for mediatek/fernvale. layer1/main blinks the big LED on fernvale and fernly usb serial is ported so that debug messages are possible. See my mtk-layer1 branch on github.

Feb 13 2018 - fixed up Makefile.mtk so that both SciphoneDreamG2 and Fernvale firmwares build. An LED blink firmware is working on Fernvale but the loader_mtk firmware no longer seems to work on the SciphoneDreamG2.

Software¶

• There is a simple bootloader/interactive shell called fernly
• There is a downstream port to Nuttx which is bootable but provides limited features
• There is a downstream OsmocomBB port which has a bootable layer1 image that doesn't support any of the GSM hardware yet.

References and documentation¶

• https://postmarketos.org/blog/2018/04/14/lowlevel/ : Article on porting OsmocomBB to the Fernvale
• https://kosagi.com/w/index.php?title=Fernvale_Main_Page : Fernvale hardware documentation
• https://kosagi.com/forums/ : Kosagi forums: they have a section on the Fernvale
• https://www.bunniestudios.com/blog/?p=4297 : Blog post on the initial hardware and software reverse engineering
• https://xobs.io/fernvale-the-path-not-taken/ : Blog post on the initial software reverse engineering
• There was a talk at the 31c3 about the Fernvale. video slides