synology-bluetooth

Compile bluetooth modules for Synology DSM7.1

The guide for DSM7.2 is here

The guide is for geminilake architecture, kernel version 4.4.180+ but the steps are similar for other architectures.

Steps

1. prepare the environment (Ubuntu 20 was used) (source):

mkdir -p /toolkit && cd /toolkit
git clone https://github.com/SynologyOpenSource/pkgscripts-ng
apt-get install cifs-utils python python-pip python3 python3-pip # depend on os
cd /toolkit/pkgscripts-ng/
git checkout DSM7.1
sudo ./EnvDeploy -v 7.1 -p geminilake

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2. download the kernel source (for geminilake, kernel 4.4.180)

• Look for your the kernel for your arch here https://archive.synology.com/download/ToolChain/Synology%20NAS%20GPL%20Source/7.0-41890

• Search for "linux-4" or "linux-3" packages.

• For geminilake there is a kernel v4: https://global.synologydownload.com/download/ToolChain/Synology%20NAS%20GPL%20Source/7.0-41890/geminilake/linux-4.4.x.txz

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3. unpack to /toolkit/build_env/ds.geminilake-7.1usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/src/

tar xvf linux-4.4.x.txz -C /toolkit/build_env/ds.geminilake-7.1/usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/src/

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4. enter chroot and compile

sudo chroot toolkit/build_env/ds.geminilake-7.1

make -C /usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/lib/modules/DSM-7.1/build M=/usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/src/linux-4.4.x/net/bluetooth/ -e CONFIG_BT=m modules

make -C /usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/lib/modules/DSM-7.1/build M=/usr/local/x86_64-pc-linux-gnu/x86_64-pc-linux-gnu/sys-root/usr/src/linux-4.4.x/drivers/bluetooth/ -e CONFIG_BT_HCIBTUSB=m modules
# ignore warnings

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5. copy bluetooth.ko and btusb.ko to your NAS /lib/modules/ folder

# assuming you have transferred the 2 files on the NAS
sudo cp bluetooth.ko btusb.ko /lib/modules/

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6. create a startup file on the NAS to load them on boot

echo -e "#!/bin/sh\ncase \$1 in\n  start)\n    insmod /lib/modules/bluetooth.ko > /dev/null 2>&1\n    insmod /lib/modules/btusb.ko > /dev/null 2>&1\n    ;;\n  stop)\n    exit 0\n    ;;\n  *)\n    exit 1\n    ;;\nesac" | sudo tee /usr/local/etc/rc.d/bluetooth-modules.sh
sudo chmod 755 /usr/local/etc/rc.d/bluetooth-modules.sh

# execute manually this time, will execute automatically on next boot
sudo /usr/local/etc/rc.d/bluetooth-modules.sh start