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TWRP for Allwinner B300 Tolino devices (Tolino Vision 6, Tolino Shine 4 and Tolino Epos 3)

State

TWRP builds and is fully functional (hopefully).

Test without installation

Not possible, fastboot boot recovery.img is not working on this device :(

How to Install

Enable adb on device

For tolino firmware version 16.x.y "search" for 112358132fb.

NOTE: See instructions for "Enable Debug-Menu Settings" here https://gist.github.com/hasezoey/d16ba0f980f00cd2193132afe4714c7c?permalink_comment_id=4672374

Verify that adb is enabled by typing in your terminal:

adb devices

There should be a bunch of numbers (the serial number) and the name of the device in the output.

Download TWRP

1. Depending on your device, download one of:
   twrp-vision6.img
twrp-shine4.img
twrp-epos3.img
   from the "releases" link on this page.

2. Rename downloaded file to twrp.img

Enter Fastboot Mode on Device

1. In your terminal type:

adb reboot bootloader

2. Device will appear to be off. Verify that it is in fastboot mode by typing:

fastboot devices

Output should be something like:

Android Fastboot Android Fastboot

Installation

1. Open your terminal in the directory where you downloaded twrp.img and type:

fastboot flash recovery twrp.img

2. This should take 5-10 seconds. Afterwards reboot into regular system by typing:

fastboot reboot

NB: fastboot reboot recovery doesn't seem to be working. So we'll reboot into regular android and then go into recovery from there.

Entering recovery (TWRP)

Type the following to boot into TWRP:

adb reboot recovery

You're done!

Bonus: Alternative Theme

Download theme-material-light.zip from releases, rename it to ui.zip and put it in /sdcard/TWRP/theme (create the directory if it doesn't exist).

Building TWRP (Optional: only if you want to compile it yourself)

1. repo init --depth=1 -u git://github.com/minimal-manifest-twrp/platform_manifest_twrp_omni.git -b twrp-8.1
2. repo sync -n -j 1 && repo sync -l -j 4
3. clone this repo to twrp-8.1/device/tolino
4. apply patches from twrp-8.1/device/tolino/patches directory
5. open terminal in twrp-8.1 directory;
6. export LC_ALL=C
7. . build/envsetup.sh
8. lunch omni_vision6-userdebug for tolino vision 6,
   lunch omni_shine4-userdebug for tolino shine 4
   lunch omni_epos3-userdebug for tolino epos 3
9. mka recoveryimage to build
10. if everything is successful you should find built recovery at path
    twrp-8.1/out/target/product/vision6/recovery.img
    or
    twrp-8.1/out/target/product/shine4/recovery.img
    or
    twrp-8.1/out/target/product/epos3/recovery.img

Credits

Thanks to Ryogo-X for Nook Glowlight 4 twrp port on which this is heavily based: https://github.com/Ryogo-X/nook_gentoo_twrp

Thanks to Morxi for twrp base: https://github.com/Morxi/twrp_devices_allwinner_b300

Thanks to NiLuJe for FBInk