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Samsung Galaxy Mini 2 (samsung-jena)

From postmarketOS Wiki
Revision as of 22:49, 16 September 2018 by Halamix2 (talk | contribs) (Partitions)
Warning WARNING: This device is not recommended for future use with postmarketOS due to its armhf architecture. Alpine Linux (the distribution that postmarketOS extends) pmaports#599 has been considering dropping it.
The processor of the device may support the armv7 architecture. If so, you can modify the device package and change the architecture accordingly.
Samsung Galaxy Mini 2
Samsung s6500d
Samsung s6500d
Manufacturer Samsung
Name Galaxy Mini 2
Codename samsung-s6500d, s6500, jena
Released 2012
Hardware
Chipset Qualcomm MSM7227A Snapdragon S1
CPU ARM Cortex-A5 800 Mhz
GPU Adreno 200
Display 320×480
Storage 4GB
Memory physically 512MiB, limited by kernel to ~385MiB (faulty dices?)
Architecture armhf
Software
Original software Android 2.3.4
postmarketOS
Category testing
Pre-built images no
postmarketOS kernel 3.4 from Cyanogen
Features
Flashing
Works
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
No data
Screen
Works
Touchscreen
Partial
Multimedia
3D Acceleration
No data
Audio
No data
Camera
No data
Camera Flash
No data
Connectivity
WiFi
No data
Bluetooth
No data
GPS
No data
NFC
No data
Modem
Calls
No data
SMS
No data
Mobile data
No data
Miscellaneous
FDE
No data
USB OTG
No data
HDMI/DP
No data
Sensors
Accelerometer
No data
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


Contributors

What works

  • Boots
  • SSH through USB
  • display
  • flashing

What does not work

  • Restart after ~2 minutes 22 seconds
  • No input (keys and screen)
  • osk-keyboard
  • Wi-Fi
  • XWayland
  • FDE
  • Not mainlined
  • No charging with turned off phone (is it even supported?)
  • 3D acceleration
  • Accelerometers and other sensors
  • Audio
  • Bluetooth
  • Camera
  • GPS
  • Mobile data
  • SMS
  • Voice

To do

Note informations below may be chaotic and change often

SMSM_RESET

Most annoying problem sunce everything on the phone has to be done within 2 minutes. After about 2mins 22secs phone reboots with dmesg showing SMSM: Modem SMSM state changed to SMSM_RESET This message is hardcoded into arch/arm/mach-msm/smd.c

Probably caused my modem, check all MODEM and MSM*_MODEM_* related options in menuconfig (there is one called reset, one reboot and one just modem) or find binary blobs if possible.

Touch screen

The screen as well as two touch buttons (menu and back) are combined together as /dev/input/event1. It displays some sort of animation when pressing buttons in postmarket demos window in weston but only for first press or two. weston-calibrate does not work


Home button and volume buttons are /dev/input/event1, where power button is recognised as /dev/input/event6

Mainline

Currently we have working 2.6 kernel, no DTS files for qcom-msm7227a.

Get data form all over the kernel source code (mainly arch/mach-msm/board-<board name>.c for starters and recreate it in .dts file(s).

Get UART working, then test basic DTS with just basics to get earlycon working:

  • used voltage is 1.8V
  • needed resistor is *probably* 619kΩ, need to test that
  • unknown name of the port in original kernel, candidates are ttyMSM0, tty0, ttyHS0 and ttyGS0


Useful links (mainly dts stuff)

The Mainline Kernel – our docs about mainlining

Qualcomm mainline porting — our sparse docs about Qualcomm mainlining

Device Tree – The Disaster so Far(pdf) – introduction to DT and basic knowledge how to move from board files do DT

Device Tree for dummies(pdf) – a little bit more complex infoa bout DT files

Halium project docs on mainlining – has a nice list where to look for ready solutions

Qualcomm SOC Mainlining Project – sadly no MSM7227a

Allwinner SOC Mainlining Project – not useful for this phone

Devicetree.org specification

Documentation/devicetree/ inside linux kernel files, should contain newest documentation about dts files, should be most reliable source of information

How to enter flash mode

Press power button and hold home button and VOL-

Alternatively, plug in microUSB plug with GND and ID pins connected through 300KΩ resistor. (so-called USB jig)

Installation

For now see Installation Guide and Flashing on Porting to a new device

Partitions

<source lang="bash"> fdisk -l /dev/mmcblk0 omitting empty partition (25) Disk /dev/mmcblk0: 3.7 GiB, 3909091328 bytes, 7634944 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000

Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 * 1 40 40 20K 4d QNX4.x CFG_DATA /dev/mmcblk0p2 41 340 300 150K 45 unknown QCSBL /dev/mmcblk0p3 341 41300 40960 20M c W95 FAT32 (LBA) FAT /dev/mmcblk0p4 41301 7634943 7593643 3.6G 5 Extended  ? / partition.bin /dev/mmcblk0p5 49152 51151 2000 1000K 46 unknown OEMSBL /dev/mmcblk0p6 51152 53151 2000 1000K 47 unknown APPSBL /dev/mmcblk0p7 53152 57151 4000 2M 5d unknown SSD /dev/mmcblk0p8 57152 81727 24576 12M 48 unknown APPS / boot partition /dev/mmcblk0p9 81728 87871 6144 3M 4a unknown MODEM_ST1 /dev/mmcblk0p10 87872 94015 6144 3M 4b unknown MODEM_ST2 /dev/mmcblk0p11 94016 110399 16384 8M 90 unknown PERSIST /dev/mmcblk0p12 110400 134975 24576 12M 91 unknown RECOVERY /dev/mmcblk0p13 134976 143167 8192 4M 92 unknown PARAMETER /dev/mmcblk0p14 143168 151359 8192 4M 93 Amoeba SECURE /dev/mmcblk0p15 151360 152383 1024 512K 95 unknown PIT /dev/mmcblk0p16 152384 1176383 1024000 500M 82 Linux swap / Solaris SYSTEM /dev/mmcblk0p17 1176384 1483583 307200 150M 94 Amoeba BBT CACHE /dev/mmcblk0p18 1483584 3396415 1912832 934M 83 Linux USERDATA /dev/mmcblk0p19 3396416 3420991 24576 12M 65 Novell Netware 386 EFS /dev/mmcblk0p20 3420992 3470143 49152 24M 9a unknown IMG_BACKUP /dev/mmcblk0p21 3470144 3478335 8192 4M 63 GNU HURD or SysV MISC /dev/mmcblk0p22 3478336 3580735 102400 50M 67 unknown HIDDEN /dev/mmcblk0p23 3580736 7429803 3849068 1.9G 64 Novell Netware 286 UMS /dev/mmcblk0p24 7429804 7437995 8192 4M 58 unknown MODEM_BKP