Samsung Galaxy Tab 4 8.0 Wi-Fi (samsung-milletwifi)
![]() Galaxy Tab 4 8.0 running postmarketOS showing the xfce4 desktop | |
Manufacturer | Samsung |
---|---|
Name | Galaxy Tab 4 8.0 Wi-Fi |
Codename | samsung-milletwifi |
Model | SM-T330 |
Released | 2014 |
Category | testing |
Original software | Android |
Original version | 4.4.2 |
Extended version | 5.1.1 |
postmarketOS kernel | 6.5.7 |
Hardware | |
Chipset | Qualcomm Snapdragon 400 (APQ8026) |
CPU | 4x 1.2 GHz Cortex-A7 |
GPU | Adreno 305 |
Display | 800x1280 px, 8.0" in (20 cm) diagonal, WXGA TFT display |
Storage | 16/32 GB flash memory, microSDXC slot (up to 64 GB) |
Memory | 1.5 GB |
Architecture | armv7 |
Type | tablet |
USB Networking |
Works |
---|---|
Flashing |
Works |
Touchscreen |
Partial |
Display |
Partial |
WiFi |
Broken |
FDE |
Works |
Mainline |
Works |
Battery |
Broken |
3D Acceleration |
Broken |
Audio |
Broken |
Bluetooth |
Broken |
Camera |
Broken |
GPS |
Broken |
Internal storage | |
USB OTG |
Broken |
Accelerometer |
Works |
---|---|
Hall Effect |
Works |
Power Sensor |
Broken |
Ir TX |
Broken |
---|---|
Ir RX |
Broken |
SD card | |
FOSS bootloader |
Broken |
Contributors
Maintainer(s)
Users owning this device
- Susurrus (Notes: 2x with flip cover)
How to enter flash mode
Download mode: When turned off hold Power+Volume Down+Home
Recovery mode: When turned off hold Power+Volume Up+Home
lk2nd: Power on and once something is shown on the display hold Volume Down
Installation
Prerequisites:
Install Lk2nd/lk1st via Heimdall. Heimdall hasn't been tested beyond this as lk2nd
is recommended for all devices.
Follow the pmbootstrap article until you have done the install action (note that --fde
stands for full-disk-encryption - this can also be left out):
pmbootstrap install --fde
The SYSTEM
partition is only 2GB, and to simplify switching back to Android, install to the larger (12GB or 30GB depending on your device) USERDATA
partition. Boot into lk2nd
and then:
pmbootstrap flasher flash_rootfs --partition userdata
Component Status
For the status of all components in the near-mainline codebase being used, see below:
Component | Part number | Works? | Notes |
---|---|---|---|
Chipset | Qualcomm Snapdragon 400 | Y | |
Graphics | Adreno 305 | N | Untested, but should work with the Adreno 330 firmware. Needs testing with proper panel support. |
eMMC (16GB) | THGBMBG7D2KBAIL | Y | |
Charging IC | SMB358SET-1939Y | Y | |
PMIC | PM8226 | N | See this issue |
Micro-USB IC | SM5502 | P | USB-OTG not supported yet. |
Audio | WCD9306 | N | Requires codec support |
Touchscreen | MELFAS MMS-252M | P | Touchkeys don't work. Will be supported in 6.6 |
Buttons | gpio-keys | Y | Volume up/down, power and home button. |
WiFi, Bluetooth | WCN3660A | P | Bluetooth works, WiFi needs a hack to disable hardware scanning |
Display | S6D7AA0 LSL080AL02 | P | Simple Framebuffer driver working now. Needs a proper panel driver. See also: Blog post about getting the display working |
Backlight | LP8556TMX-E09-S7003056 | P | Changing brightness doesn't work. Pending panel work. See milletwifi_panel branch. |
Front Camera | |||
Rear Camera | |||
IR | ABOV MC96FR116CU | N | 8-bit microcontroller with custom firmware to act as an IR LED transceiver. |
GPS | WGR7640 | P | Driver support implemented, but ModemManager doesn't support WiFi-only devices & gpsd is awaiting gpsd!139. |
Hall effect/flip cover sensor | S-5712CCDL1-I4T1U | Y | Connected via GPIO. |
Accelerometer | STMicroelectronics K2HHTR | Y |
Known issues
dmesg
shows warning:l20: voltage operation not allowed
(see linux#6)dmesg
shows warning:/cpus/cpu@0 missing clock-frequency property
(also for cpu1, 2, & 3). - Normal operation, not a concern.dmesg
shows errors like:i2c_qup f9926000.i2c: tx channel not available
- TX does work with i2c here, just not via DMA, which this SoC doesn't support. This error can be safely ignored.
Hardware Revisions
7 versions are known to exist from the spec sheet. These may correlate with the different versions that are listed with the DTS files included in downstream (annotated as Rev-00
through Rev-05
). These revisions are specified by a 4-bit value set by external pull-up/pull-down resistors on pins 12, 13, 32, & 63. To read these values run sudo gpioget 0 12 13 32 63
.
The output maps to the revision name as follows:
Value | Revision |
---|---|
0100 | SM-T330_REV0.0 |
0101 | SM-T330_REV0.1 |
0110 |
SM-T330_REV0.2 |
0111 | SM-T330_REV0.3 |
1000 | SM-T330_REV0.4 |
1001 | SM-T330_REV0.5 |
1011 | SM-T330_REV0.5C |
See also
- Initial device support in pmOS: pmaports!4495
- Initial device support in lk2nd: lk2nd#302
- Larger-screen device with very similar hardware: Samsung_Galaxy_Tab_4_10.1_(samsung-matissewifi)
- Galaxy Tab 4 8.0 User Manual
- Downstream Android kernel source
- Device details on Wikipedia
- PIT file