DART-MX8M Android Modem
Overview
The DART-MX8M is capable of adding a Mini PCI-E based modem to support LTE connectivity.
Note:
- At present we support LTE Quectel EC25.
- Other modules could be supported please contact your module vendor.
Hardware Interface
- Quectel EC25 mPCI-E Hardware module with a SIM card
- mPCI-E interface with USB support, like the one on the DT8MCustomBoard (note that the Symphony-Board mPCI-E interface does not support USB)
Hardware Availability and Setup
- Connect SIM card to mPCIe-E module
- Connect mPCI-E Module to J23
Note: Make sure your SIM provider is supporting mPCI-E module specification of the network.
Software Setup
Make sure you have the required hardware as per above.
RIL Setup
By default, the build doesn't have a RIL setup.
To add the RIL support follow the below steps.
Register and get access to the download zone https://www.quectel.com/login Download Quectel_Android_RIL_Driver_XX.Y.ZZ_master_<release>.tgz Where (XX.Y.ZZ are version numbers from quectel and <release> can be alpha/beta etc)
Adding Driver to build
Edit imx8m_var_dart_android_defconfig and enable following
Device Drivers->
Network device support ->
USB Network Adapters ->
Multi-purpose USB Networking Framework ->
<*> QMI WWAN driver for Qualcomm MSM based 3G and LTE modems
and enable
CONFIG_USB_NET_QMI_WWAN=y
Downloading and adding Quectel RIL to build
$ cd ~/var_imx-o8.1.0_1.3.0_8m/android_build $ mkdir -p vendor/quectel/ $ tar -xvf ~/Downloads/Quectel_Android_RIL_Driver_V3.3.49_master_beta.tgz -C vendor/quectel/
Add Quectel libraries to build
Edit device/variscite/imx8m/dart_mx8m/dart_mx8m.mk and add following code
TARGET_HAVE_QUECTEL_RIL := true
ifeq ($(TARGET_HAVE_QUECTEL_RIL),true)
# wifionly device
PRODUCT_PROPERTY_OVERRIDES += \
ro.radio.noril=false
PRODUCT_COPY_FILES += \
vendor/quectel/libquectel-ril/arm64-v8a/libreference-ril.so:vendor/lib64/hw/libreferece-ril.so \
vendor/quectel/libquectel-ril/arm64-v8a/ip-up:vendor/bin/ip-up \
vendor/quectel/libquectel-ril/arm64-v8a/chat:vendor/bin/chat \
vendor/quectel/libquectel-ril/arm64-v8a/ip-down:vendor/bin/ip-down \
vendor/quectel/libquectel-ril/ql-ril.conf:vendor/etc/ql-ril.conf
fi
Add Quectel libraries in the ril-daemon service
Edit device/variscite/imx8m/dart_mx8m/init.rc and add following code
service ril-daemon /vendor/bin/hw/rild -l vendor/lib64/hw/
class main
user radio
group radio cache inet misc audio sdcard_rw log
capabilities BLOCK_SUSPEND NET_ADMIN NET_RAW
Add RILD in the HIDL service
Edit device/variscite/imx8m/dart_mx8m/manifest.xml and add following code
<hal format="hidl"> <name>android.hardware.radio</name> <transport>hwbinder</transport> <fqname>@1.4::IRadio/slot1</fqname> <fqname>@1.2::ISap/slot1</fqname> </hal>
Setup file context and selinux permissions
Edit device/variscite/imx8m/dart_mx8m/ueventd.nxp.rc and add following code
#quectel port /dev/ttyUSB* 0660 radio radio /dev/ttyACM* 0660 radio radio /dev/cdc-wdm* 0660 radio radio /dev/qcqmi* 0660 radio radio /dev/cdc-acm* 0660 radio radio #PCIe /dev/mhi_DUN 0660 radio radio /dev/mhi_DIAG 0660 radio radio /dev/mhi_BHI 0660 radio radio /dev/mhi_LOOPBACK 0660 radio radio /dev/mhi_QMI0 0660 radio radio
Edit device/variscite/imx8m/dart_mx8m/sepolicy/file_contexts and add following code
#quectel /dev/ttyUSB[0-9] u:object_r:radio_device:s0 /dev/ttyACM[0-9] u:object_r:radio_device:s0 /dev/cdc-wdm[0-9] u:object_r:radio_device:s0 /dev/qcqmi[0-9] u:object_r:radio_device:s0 /vendor/bin/hw/rild u:object_r:rild_exec:s0 /dev/socket/rildOemHook u:object_r:rild_socket:s0 #PCIe /dev/mhi_DUN u:object_r:radio_device:s0 /dev/mhi_DIAG u:object_r:radio_device:s0 /dev/mhi_BHI u:object_r:radio_device:s0 /dev/mhi_LOOPBACK u:object_r:radio_device:s0 /dev/mhi_QMI0 u:object_r:radio_device:s0
Create a seplicy file for rild to allow the socket communication File : device/variscite/imx8m/dart_mx8m/sepolicy/rild.te and add the following content to it.
allow rild self:packet_socket { create bind write read };
Build Android Images with RIL
Rebuild the android images using
Developers Guide
Flash Android Images with RIL
Flash the resulting Android Images Developers Guide