Samsung Galaxy Core Plus (samsung-cs02)

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).	Works
Battery Charging and battery level reporting works	Works
Screen Display works. Ideally with sleep mode and brightness control.	Works
Touchscreen	Works
Multimedia
3D Acceleration	Untested
Audio Audio playback, microphone, headset and buttons.	Partial
Camera	Untested
Connectivity
WiFi	Works
Bluetooth	Untested
GPS	Untested
Modem
Calls	Broken
SMS	Broken
Mobile data	Broken
Miscellaneous
FDE Full disk encryption and unlocking with unl0kr.	Untested
Sensors
Accelerometer Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile	Works

Samsung Galaxy Core Plus
Manufacturer	Samsung
Name	Galaxy Core Plus
Codename	samsung-cs02
Released	2013
Type	handset
Hardware
Chipset	Broadcom BCM21664T
CPU	2x 1.2 GHz Cortex-A9
GPU	VideoCore IV
Display	480x800 (217dpi)
Storage	4 GB
Memory	768 MB
Architecture	armv7
Software
Original software The software and version the device was shipped with.	Android 4.2.2
postmarketOS
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	no
pmOS kernel The kernel version that runs on the device's port.	3.4.5

Samsung Galaxy Core Plus G3500 (Broadcom variant)

Contributors

Santeri3700

Maintainer(s)

Santeri3700

Users owning this device

Santeri3700 (Notes: two phones, pmOS WIP)

What works

Screen
Audio* (more information below)
USB Network
Wifi*
Touch (/dev/input/event4)
Proximity sensor (/dev/input/event0)
- enable with echo 1 > /sys/class/input/input0/enable
Accelerometer (/dev/input/event1)
- enable with echo 1 > /sys/class/input/input1/enable
Compass (/dev/input/event2)
- enable with echo 1 > /sys/class/input/input2/enable

What does not work

Setting up wifi using NetworkManager GUI/applet. (nm-applet never asks for the PSK, manually setting the password works and nmtui works too)
Everything else

Audio

Audio works partially and only with Alsa. PulseAudio doesn't seem to work even when changing the sample rate to 48KHz.

Playback only work with with the sample rate of 48KHz. Anything else than 48KHz results in silence or or crackling (and the logs say "underrun!!!")
Recording works only with the sample rate of 48KHz and mono only.

Alsa record & playback test: arecord -f dat -c 1 | aplay -f S16_LE -r 48000 -c 1

Misc

CMDLINE: console=ttyS2,115200n8 mem=738M cma0=0M carveout0=0M vmalloc=136M androidboot.console=ttyS2 logbuf_nocache=1 sec_debug.reset_reason=0x1A2B3C00 sec_debug.level=0 androidboot.debug_level=0x4f4c loglevel=0 sec_log=0x70000@0xae900000 bootloaderfb=0xae980000,0x180000 lpcharge=0 cordon=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx androidboot.emmc_checksum=3 brd_ver=2 androidboot.serialno=xxxxxxxxxxxxxxxx
Both 150kΩ and 619kΩ resistors work for a serial debug cable.

Bootloader / S-Boot 4.0

To abort auto-boot, press Enter while the phone is powered on. You will need a serial debug cable to be connected before powering on.

Use command help to get started and use command log to print the output log if commands don't print output immediately.

More instructions about the log level and debug printing can be found below.

Version: Samsung S-Boot 4.0-2930239 for SM-G350 (Jul 4 2016 - 11:58:36)

Default printenv

: REBOOT_MODE: 0
: SWITCH_SEL: 1
: DEBUG_LEVEL: 20300
: KERNEL_LOG_LEVEL: 17484
: SUD_MODE: 0
: DN_ERROR: 0
: CHECKSUM: 3
: INT_RSVD6: 0
: INT_RSVD7: 0
: INT_RSVD8: 0
: INT_RSVD9: 0
: CMDLINE: console=ttyS2,115200n8 mem=738M cma0=0M carveout0=0M vmalloc=136M androidboot.console=ttyS2 logbuf_nocache=1
: STR_RSVD1: (null)
: STR_RSVD2: (null)

How to enable S-Boot & Kernel debug output (persistent)

S-BOOT # setenv KERNEL_LOG_LEVEL 17740
argv[0]: setenv
argv[1]: KERNEL_LOG_LEVEL
argv[2]: 17740
S-BOOT # printenv
: REBOOT_MODE: 0
: SWITCH_SEL: 1
: DEBUG_LEVEL: 20300
: KERNEL_LOG_LEVEL: 17740 <--- New log level appears here
: SUD_MODE: 0
: DN_ERROR: 0
: CHECKSUM: 3
: INT_RSVD6: 0
: INT_RSVD7: 0
: INT_RSVD8: 0
: INT_RSVD9: 0
: CMDLINE: console=ttyS2,115200n8 mem=738M cma0=0M carveout0=0M vmalloc=136M androidboot.console=ttyS2 logbuf_nocache=1
: STR_RSVD1: (null)
: STR_RSVD2: (null)
S-BOOT # saveenv
S-BOOT # reset

Hardware


WIFI/Bluetooth/FM-Radio	Broadcom BCM4330LB2KUBG
NFC	Broadcom BCM2079(1b05)
PMU	Broadcom BCM59054A1IUB1G
Accelerometer & compass	Bosch BMC150
Proximity sensor	Sharp GP2AP002
Display	BOE BF050WVM-500-1HP0 (5.0" A-si TFT)
LCD Driver	Himax HX8369 (480x800)
Rear camera	Samsung S5K4ECGX (5.0MP)
Front camera	SR030PC50 (0.3MP)
Capacitive touch buttons sensor	Broadcom BCM20793MKML4G
Storage/EMMC	Samsung KMK5U000YM-B309 (4GB)
Platform	Hawaii (Broadcom)
Family	KONA (Broadcom)

How to enter flash mode

Press volume down and the home key, then press the power button.
Maintain volume down and home pressed until a warning screen comes up
Press volume up to confirm

Links