how to enable NCM function for imx-o8.1.0_1.3.0_8m bsp

[baodongchen]

Hello All,

We want test NCM function for evk-8mq board.

Is three anything need to be patched for NCM function to work?

Currently i changed this on android side, please correct me if anything wrong, thanks.

device/fsl:

diff --git a/evk_8mq/init.usb.rc b/evk_8mq/init.usb.rc
index 0cb9452..2be2695 100644
--- a/evk_8mq/init.usb.rc
+++ b/evk_8mq/init.usb.rc
@@ -37,6 +37,7 @@ on fs
     mkdir /config/usb_gadget/g1/functions/audio_source.gs3
     mkdir /config/usb_gadget/g1/functions/rndis.gs4
     mkdir /config/usb_gadget/g1/functions/midi.gs5
+    mkdir /config/usb_gadget/g1/functions/ncm.gs6
     mkdir /config/usb_gadget/g1/strings/0x409
     mkdir /config/usb_gadget/g1/configs/b.1/strings/0x409
     # The mount of functionfs for adb must be put AFTER the mkdir for functions in configfs
@@ -116,3 +117,15 @@ on property:sys.usb.ffs.ready=1 && property:sys.usb.config=rndis,adb && property
     write /config/usb_gadget/g1/os_desc/use 1
     write /config/usb_gadget/g1/idProduct 0x4ee4
     write /config/usb_gadget/g1/idVendor 0x18d1
+
+on property:sys.usb.config=ncm && property:sys.usb.configfs=1
+    write /config/usb_gadget/g1/idProduct 0x685d
+    write /config/usb_gadget/g1/idVendor 0x04e8
+
+on property:sys.usb.ffs.ready=1 && property:sys.usb.config=ncm,adb && property:sys.usb.configfs=1
+    write /config/usb_gadget/g1/idProduct 0x685d
+    write /config/usb_gadget/g1/idVendor 0x04e8

system/core:

diff --git a/rootdir/init.usb.configfs.rc b/rootdir/init.usb.configfs.rc
index de1aab3..4d5c7a6 100644
--- a/rootdir/init.usb.configfs.rc
+++ b/rootdir/init.usb.configfs.rc
@@ -141,3 +141,26 @@ on property:sys.usb.ffs.ready=1 && property:sys.usb.config=rndis,adb && property
     symlink /config/usb_gadget/g1/functions/ffs.adb /config/usb_gadget/g1/configs/b.1/f2
     write /config/usb_gadget/g1/UDC ${sys.usb.controller}
     setprop sys.usb.state ${sys.usb.config}
+
+
+on property:sys.usb.config=ncm && property:sys.usb.configfs=1
+    write /config/usb_gadget/g1/configs/b.1/strings/0x409/configuration "ncm"
+    rm /config/usb_gadget/g1/configs/b.1/f1
+    rm /config/usb_gadget/g1/configs/b.1/f2
+    rm /config/usb_gadget/g1/configs/b.1/f3
+    symlink /config/usb_gadget/g1/functions/ncm.gs6 /config/usb_gadget/g1/configs/b.1/f1
+    write /config/usb_gadget/g1/UDC ${sys.usb.controller}
+    setprop sys.usb.state ${sys.usb.config}
+
+on property:sys.usb.config=ncm,adb && property:sys.usb.configfs=1
+    start adbd
+
+on property:sys.usb.ffs.ready=1 && property:sys.usb.config=ncm,adb && property:sys.usb.configfs=1
+    write /config/usb_gadget/g1/configs/b.1/strings/0x409/configuration "ncm_adb"
+    rm /config/usb_gadget/g1/configs/b.1/f1
+    rm /config/usb_gadget/g1/configs/b.1/f2
+    rm /config/usb_gadget/g1/configs/b.1/f3
+    symlink /config/usb_gadget/g1/functions/ncm.gs6 /config/usb_gadget/g1/configs/b.1/f1
+    symlink /config/usb_gadget/g1/functions/ffs.adb /config/usb_gadget/g1/configs/b.1/f2
+    write /config/usb_gadget/g1/UDC ${sys.usb.controller}
+    setprop sys.usb.state ${sys.usb.config}
diff --git a/rootdir/init.usb.rc b/rootdir/init.usb.rc
index 3168f40..0b50a23 100644
--- a/rootdir/init.usb.rc
+++ b/rootdir/init.usb.rc
@@ -106,6 +106,31 @@ on property:sys.usb.config=accessory,audio_source,adb && property:sys.usb.config
 on boot && property:persist.sys.usb.config=*
     setprop sys.usb.config ${persist.sys.usb.config}
 
+# ncm
+on property:sys.usb.config=ncm && property:sys.usb.configfs=0
+    write /sys/class/android_usb/android0/enable 0
+    write /sys/class/android_usb/android0/idVendor 04e8
+    write /sys/class/android_usb/android0/idProduct 685d
+    write /sys/class/android_usb/android0/functions ${sys.usb.config}
+    write /sys/class/android_usb/android0/enable 1
+    setprop sys.usb.state ${sys.usb.config}
+
+# ncm,adb
+on property:sys.usb.config=ncm,adb && property:sys.usb.configfs=0
+    write /sys/class/android_usb/android0/enable 0
+    write /sys/class/android_usb/android0/idVendor 04e8
+    write /sys/class/android_usb/android0/idProduct 685d
+    write /sys/class/android_usb/android0/functions ${sys.usb.config}
+    write /sys/class/android_usb/android0/enable 1
+    setprop sys.usb.state ${sys.usb.config}
+    start adbd
+
 #
 # USB type C
 #

[diegoadrian]

Hello,

Unfortunately, this is out of our scope, since you need to modify our Android BSP to make it work and for the moment we do not have any documentation available that could help you with your problem. As far as I know is that the USB NCM, uses the CDC function. However, I recommend you to go with professional services support, they could help you for sure.

I apologize for the inconveniences this could give you.

Best Regards,

Diego.