Android_Joycon_Lib

a hidapi for joycon stick on android platform

After a long time dig. Finally i made android can communicate with switch joycon stick.

If you want try this. You need change ASOP,Then complier it, Flash it.

What you need to do is :

1.Open the hidraw file node (due to some unkone resone, Android close the /dev/hidraw* device file node, so you need open it.)

2.Change some file in Android linux kernel.(linux/hidraw.h linux/hidraw.c)

You can find the different between liunx kernel and android liunx kernel in this two files.

Linux kernel :

https://github.com/torvalds/linux/blob/master/drivers/hid/hidraw.c#L456

https://github.com/torvalds/linux/blob/master/include/uapi/linux/hidraw.h#L42

Add this code to your ASOP

File => private/msm-google/drivers/hid/hidraw.c

if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWUNIQ(0))) {
        int len = strlen(hid->uniq) + 1;
        if (len > _IOC_SIZE(cmd))
          len = _IOC_SIZE(cmd);
        ret = copy_to_user(user_arg, hid->uniq, len) ?
          -EFAULT : len;
        break;
      }

File => private/msm-google/include/uapi/linux/hidraw.h

#define HIDIOCGRAWUNIQ(len)     _IOC(_IOC_READ, 'H', 0x08, len)

3.Change the device node file /dev/hidraw* permisson to 0666 (You can change forever, modify ASOP file system/core/rootdir/ueventd.rc)

  /dev/hidraw*  0666  root  root

4.SELinux

Due to Android SElinux,Even we give /dev/hidraw* 0666, We still can not read or write it. So we need to close SELinux, or you can try write SELinux rule.

After you do all thing above, You can try run the demo.

For arm64 platform

Install bin

adb push lib/arm64-v8a/joyconlib /data/local/tmp

Make the system partition writable

mount -o remount,rw /system

Install libusb

adb push lib/arm64-v8a/libhidapi.so /sdcard/ cat > /system/lib64/libhidapi.so < /sdcard/libhidapi.so rm /sdcard/libhidapi.so mount -o remount,ro /system

If all goes well, run it ,you may see thing like this videos.