HTC HD2 (htc-leo)

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(Redirected from Htc-leo-(HTC-HD2))
HTC HD 2
HTC HD2
HTC HD2
Manufacturer HTC
Name HD 2
Codename htc-leo
Released 2009
Category testing
Pre-built images no
Original software Windows Mobile
Original version 6.5 Professional
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
Features
USB Networking
Broken
Flashing
Works
Touchscreen
Works
Display
Works
WiFi
Works
FDE
Mainline
Partial
Battery
Works
3D Acceleration
Broken
Audio
Bluetooth
Camera
GPS
Mobile data
Internal storage
SMS
Calls
USB OTG
NFC
Sensors
Accelerometer
Magnetometer
Ambient Light
Proximity
Hall Effect
Barometer
Power Sensor
Misc
Built-in DVB
Camera Flash
Keyboard
Touchpad
USB-A
HDMI/DP
Ir TX
Ir RX
Stylus
Memory Card
Haptics
Ethernet
FOSS bootloader


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

Progress

  • Got the kernel to compile, based on maniacx's nougat android kernel
  • The qsd8k-legacy kernel boots correctly : [1]
  • Add firmware for wlan

Next steps

  • Add support for bluetooth and 3D acceleration (?)

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

Currently loads up to jumping to initramfs, then throws an "Oops - undefined instruction" on any armv7 initrd tried

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.

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