ASUS Transformer Pad (asus-tf300t)

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ASUS Transformer Pad
ASUS Transformer Pad
ASUS Transformer Pad
Manufacturer ASUS
Name Transformer Pad
Codename asus-tf300t
Released 2012
Category testing
Original software Android 4.0 on Linux 3.1
Hardware
Chipset Nvidia Tegra 3 T30L
CPU Quad-core 1.2 GHz Cortex-A9
GPU ULP GeForce
Display 1280x800 IPS
Storage 16/32 GB
Memory 1 GB
Architecture armv7
Features
USB Networking
Works
Flashing
Works
Touchscreen
Works
Display
Works
WiFi
Works
Xwayland
Works
FDE
Works
Mainline
Works
Battery
Works
3D Acceleration
Partial
Accelerometer
Works
Audio
Partial
Bluetooth
Works
Camera
GPS
Partial
Mobile data
Unavailable
SMS
Unavailable
Calls
Unavailable
USB OTG
Works
NFC
Unavailable
Ir TX



Contributors

  • osctobe (Michał Mirosław)
  • Clamor
  • Ion Agorria

Device owners


Variants

  • TF300T - regular wifi only tablet, currently has support both in pmaports and grate Linux kernel fork.
  • TF300TG - 3G version of TF300T with some slight differences. Modem is very close to Nexus 7 2012 cellular (tilapia).
  • TF300TL - LTE version of TF300T with differences similar to TF300TG. Uses Asus custom modem setup and doesn't have mainline driver for it.

Note: TF300TL has experimental support in this grate fork. TF300T and TF300TG are officially supported.

Compiling a kernel

Android kernel

Mainline (Grate)

Unlocking

The first step to do anything with the device is unlocking, with this device its done by sideloading the unlock apk from asus and clicking a few buttons in the app. In case you get a network connection error, you will need to patch the unlocker.

Installation

How to enter flash modes

Turn tablet off if it is in the system. Then press POWER and VOL DOWN buttons till you feel the vibration. Then release the POWER only. You will enter the bootloader/fastboot. In bootloader you can navigate with VOL DOWN button and to choose option use VOL UP button.

Bootloader version

You need bootloader version of 10.6.1.27.5 which is available in latest android ROM provided by Asus.

Installation process

Note The bootloader doesn't handle flashing the boot and userdata partition correctly, the official firmware package flashes an "Android blob" to the staging partition with fastboot which triggers an flashing screen on the tablet which copies the data to the correct partitions. pmbootstrap has tools to pack and flash kernel correctly, no worries!

Preparing rootfs and flashing kernel:

1 $ pmbootstrap init
2 $ pmbootstrap install
3 $ pmbootstrap flasher flash_kernel

Flashing rootfs

Note This may change size of your data partition. You can fix it by resizing partition in TWRP before flashing Android.

You should proceed very carefully here.

When rootfs is larger than approx. 800 MB you can flash it to the /userdata partition ONLY, if rootfs is smaller, you can flash it to /system or /userdata.

Prerequisites: TWRP, at least version 3.3.1-0, binaries for 10.6.1.27.5 bootloader are here.

First, start TWRP (go to bootloader and choose RCK) and then continue with these instructions

1 (computer) $ pmbootstrap export
2 (computer) $ adb shell
3 (twrp) $ umount /dev/block/mmcblk0p1 <- unmounting /system partition
4 (twrp) $ umount /dev/block/mmcblk0p8 <- unmounting /data partition
5 (computer again) $ adb push /tmp/postmarketOS-export/asus-tf300t.img /dev/block/mmcblk0p1 <- to flash rootfs to /system partition
6 'OR'
7 (computer again) $ adb push /tmp/postmarketOS-export/asus-tf300t.img /dev/block/mmcblk0p8 <- to flash rootfs to /data partition

Hardware status (mainline)

Status Hardware Info
Y Booting Boot image size is limited to approx. 8 MB.
Y Panel Innolux G101ICE-L01 WXGA (1280x800) LCD IPS panel through LVDS controller.
Y HDMI output HDMI works, but maximum output is 1080p due to Tegra 3 limitations.
Y Touchscreen Used Elantech EKTH1036 touchscreen.
Y USB One full size USB 2.0 in dock or via 40pin adapter.
Y SD cards MicroSD card and full sized SD card (recognized as USB drive) in dock.
Y Internal memory Hynix emmc, works.
P GPS Broadcom GPS BCM4751 is used. Device tree has proper bindings but device itself has weak signal.
Y WiFi Uses Azurewave AW-NH615 BCM4329. Wi-Fi works (best with IWD daemon: apk add iwd; rc-config del wpa_supplicant; rc-config add iwd; and HOWTO).
Y Bluetooth Uses Azurewave AW-NH615 BCM4329B1. Works fine out of the box.
Y GPIO keys There is 3 keys on GPIO: Power, Volume up, Volume down.

Additionally GPIO-keys like are LID sensor and Audio dock line-out detect.

Y Dock Keyboard Keyboard and touchpad work. It is handled via Nuvoton NPCE795LA0BX embedded controller and driver is mainlined.
Y Battery/Charger Driver is based on Texas Instruments bq24725 SMBus Charge Controller driver and GPIO charger but works through pad/dock EC. Charging and charge level of both batteries are shown correctly.
Y PMIC Transformers use Texas Instruments TPS659110 PMIC and TPS62361 core regulator.
P Sound Sound codec is WM8903 on TF300T and RT5631 on cellular models. Kernel driver and tegra_wm8903/tegra_rt5631 glue drivers are present. Further ALSA configuration is needed. Audio through HDMI works.
N Voice processor Transformers use separate Fortemedia FM34NE voice processor. No mainline driver is available. Is used for voice processing and noise cancelling. Might not be needed.
Y Thermal sensor NCT1008 ON Semiconductor LM90 series thermometer.
Y Orientation sensors Include Invensense mpu3050 gyroscope with Kionix KXTF9 accelerometer and Aichi AMI306 3-axis digital compass.
Y Light sensor Driver Dyna-Image AL3010. Brightness regulation works, install iio-sensor-proxy . It's slightly oversensitive.
N Front camera Aptina mi1040 camera sensor. Grate kernel doesn't support VI yet. Mainline linux driver exists (authored by Okias) and proper nodes are added to device tree.
N Rear camera Is not planned to be added to support list. If you have such a need, development is welcome. Mainline driver doesn't exist.
P ULP GeForce GPU Acceleration partially works.
N Modem TF300TG/TF300TL - contribution welcome, no work done yet.

Usability

Desktop environment

Since 3D acceleration is not available yet, all DE which use it will be painfully slow and laggy.

Currently xfce4 or mate are recommended.

See also