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Tokio Techbook (tokio-techbook)

Tokio Techbook
Tokio Techbook
Tokio Techbook
Manufacturer Tokio
Name Techbook
Codename tokio-techbook
Released 2012
Original software Android 4 (Windows CE 6?)
postmarketOS kernel 4.3.0
Hardware
Chipset Via / WonderMedia 8850
CPU 1.0 GHz Cortex-A9
GPU Mali 400
Display 800x480
Storage Unknown
Memory 434 MB
Architecture armv7
Features
USB Networking
Unavailable
Flashing
Unavailable
Touchscreen
Unavailable
Display
Works
WiFi
Xwayland
FDE
Mainline
Partial
Battery
Broken
3D Acceleration
Broken
Accelerometer
Audio
Bluetooth
Unavailable
Camera
GPS
Unavailable
Mobile data
Unavailable
SMS
Unavailable
Calls
Unavailable
USB OTG



Contents

Contributors

  • Magnusgulin

Maintainer(s)

  • Magnusgulin

Users owning this device

How to enter flash mode

There is probably no kind of flash mode or recovery mode on this device. The boot loader (uboot) checks for compiled script in path /boot/FirmwareInstall/autorun.1.wmt.

Some of these devices might also check for boot options over the built in ethernet port.

Installation

Install PMOS to sd card. Start device with the sdcard in the internal card reader of the device. You should see a text in top left corner saying "BOOTING!!"

If for some reason no text comes up, try copy the file /boot/FirmwareInstall/autorun.1.wmt to path /wmt_scriptcmd on sdcard.

General

This is a somewhat exotic version of the standard VIA / WonderMedia 8850 laptops. They should all be pretty compatible, except for

  • Memory size: 128MB, 256 MB, 512 MB and 1024 MB versions seems to exist. Needs variable change in uboot script.
  • Flash size: Unknown, but boots only from sd card for now. There is an unstable driver for the nand chips
  • Screen: 800x480 and 1024 x 600. Should not need config change to boot.

So if you have a similar laptop there is a high possibility that this port works out of the box. Other versions of this device is known as Eken, Mid7, Mid8, Mid9, Mid10....

Wifi

Wifi is a usb dongle soldered directly to motherboard. It is triggered on and off by a magic GPIO command. This is still a work in progress.

See https://kernelhacks.blogspot.com/2012/06/arch-linux-on-wm8650-netbook.html: Upon installing this package, to enable the WiFi chip, you have to input the command: gpio 1:6:d8110040:d8110080:d81100c0 And to disable the WiFi chip: gpio 0:6:d8110040:d8110080:d81100c0

Searching for 8850 uboot shows that some bootloader scripts sets a lot of GPIO pins on boot, for example:

setenv wmt.gpi.bat [0:0:00040000:d8110040:d8110080:d8110000:d8110480:d81104C0][1:0:00000020:d8110040:d8110080:d8110000:d8110480:d81104C0][2:1:00010000:d8110040:d8110080:d8110000:d8110480:d81104C0]

setenv wmt.gpo.wifi 6:0:6:d8110040:d8110080:d81100C0

setenv wmt.io.bat 3:2:1000:f25:dc4:f32:ea0:e75:e47:e12:de2:db7:d80:d3d:cfe:cbc

setenv wmt.pwbn.param 100:100:100

TODO

  • Find source for "gpio" binary -> toggle gpio pin for wifi
  • Get to boot with postmarketos-stable instead of 4.3.0 mainline

See also