Jump to content

HTC HD2 (htc-leo)

From postmarketOS Wiki
HTC HD 2
HTC HD2
HTC HD2
Manufacturer HTC
Name HD 2
Codename htc-leo
Released 2009
Type handset
Hardware
Chipset Qualcomm Snapdragon S1 (QSD8250)
CPU 1.0 GHz Scorpion
GPU Adreno 200
Display 480x800
Storage 512 MB / 1024 MB
Memory 576 MB
Architecture armv7
Software
Original software
The software and version the device was shipped with.
Windows Mobile 6.5 Professional
Extended version
The most recent supported version from the manufacturer.
Windows Mobile
postmarketOS
Category downstream
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
no
Device package device-htc-leo
Kernel package linux-htc-leo
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Works
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Broken
Battery
Charging and battery level reporting works
Works
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Works
Multimedia
3D Acceleration
Broken
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
Connectivity
WiFi
Works
Bluetooth
Untested
GPS
Untested
Modem
Calls
Untested
SMS
Untested
Mobile data
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Untested

Contributors

  • Langoor
  • (others on IRC)
  • Dominduchami
  • (others on the Matrix chat : Henri Dellal, knuxify and others)

What works

  • Kernel boots
  • Display and touchscreen works
  • Boots with xfce and mate (UI's that require 3D acceleration are not working)
  • Wifi works correctly

What does not work

  • Usb networking
  • 3D acceleration
  • Everything else

Bootloaders

Because of the age of the HD2, there are serval 3rd party bootloaders available, most commonly used:

  • Haret, Haret is a bootloader (provided as haret.exe) to boot linux or android from WITHIN windows mobile, you start windows mobile, not a great choice for postmarketOS.
  • a(MagLDR), proprietary 3rd party bootloader developed by Cotulla and DFT, some folks over at Tytung's android forum, tried to reverse engineer it and created aMagLdr (1.13.04), unfortunately still proprietary
  • cLK, based on littlekernel and download possible with cwm or twrp recovery embedded, seems to be the best option. Littlekernel also provides fastboot wich is handy. Only this bootloader is tested right now.
  • An open source port of EDK2 is available here

Mainline Kernel

A close-to-mainline kernel port is available here with basic support for :

  • screen via the EFI framebuffer
  • interrupt controller
  • timer

Installation

MAGLDR would probably also work, but using CLK is easier because of fastboot access.

  • Install the rootfs using an SD Card pmbootstrap install --sdcard=/dev/sd?
  • Insert the SD Card
  • Boot the device into the CLK bootloader
  • Flash the kernel to the boot partition using pmbootstrap flasher flash_kernel (flashing to the additional partitions such as sboot or tboot should work too)
  • Select the first option (or the other boot partion if it was chosen in the previous step) to boot the kernel.

Flashing the rootfs and the kernel to NAND would probably work on the T-mobile US version of HD2 (it has 1gb of storage space), but it is untested for now.

Hardware

  • USB: ci-hdrc-usb2
  • Light sensor: Capella CM3602
  • Wi-Fi: Broadcom BCM4329
  • Magnetometer: Asahi Kasei AK8976A
  • Battery charger: DS2746

How the wlan support was done

  • Find what wlan chip is being used : bcm4329 in this case
  • Read WiFi page
  • Check what package contains firmware for the chip, in this case it is "firmware-aosp-broadcom-wlan"
  • Change the firmware path in the kernel config
  • Add a nonfree_firmware section :
nonfree_firmware() {
	pkgdesc="Wifi firmware"
	depends="firmware-aosp-broadcom-wlan"
	mkdir "$subpkgdir"
}
  • Update checksums, rebuild device and linux packages and boot the device

See also