Enabling special kernel as for example the linux mainline one

README.md

@@ -1,5 +1,16 @@
 Patch/Compile/Install bluetooth driver for:
 
+############## MY PERSONAL REMARKS ########################
+
+I customized the installation script in order to support any linux kernel, for example the 'linux-mainline' as well as the 'linux-libre' with the possibility for the user to provide the website link to download the tar file of his custom linux kernel. For further information, check the comments of my customized script which explains in details the changes and enhancement.
+
+To use it, only need to run the custom script with sudo from this repo.
+
+For the moment, it works (successfully tested) with :
+- Arch Linux
+
+############## REMARKS FROM THE OFFICIAL DIR ##############
+
 Macbook Pro models: 13,1 and 14,1
 Macbook 12 inch models (2015 and later): 8,1 + 9,1 + 10,1
 

install-bluetooth-customized-by-me.sh

@@ -0,0 +1,115 @@
+#!/bin/bash
+
+while [ $# -gt 0 ]
+do
+    case $1 in
+    -i|--install) dkms_action='install';;
+    -k|--kernel) dkms_kernel=$2; [[ -z $dkms_kernel ]] && echo '-k|--kernel must be followed by a kernel version' && exit 1;;
+    -r|--remove) dkms_action='remove';;
+    -u|--uninstall) dkms_action='remove';;
+    (-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
+    (*) break;;
+    esac
+    shift
+done
+
+if [[ $dkms_action == 'install' ]]; then
+    bash dkms.sh
+    exit
+elif [[ $dkms_action == 'remove' ]]; then
+    bash dkms.sh -r
+    exit
+fi
+
+[[ -n $dkms_kernel ]] && uname_r=$dkms_kernel || uname_r=$(uname -r)
+kernel_version=$(echo $uname_r | cut -d '-' -f1) #ie 6.4.15
+
+major_version=$(echo $kernel_version | cut -d '.' -f1)
+minor_version=$(echo $kernel_version | cut -d '.' -f2)
+major_minor=${major_version}${minor_version}
+kernel_short_version="$major_version.$minor_version" #ie 5.2
+
+build_dir="build"
+patch_dir='patch_bluetooth'
+bluetooth_dir="$build_dir/bluetooth"
+
+[[ -d $bluetooth_dir ]] && rm -rf $bluetooth_dir
+[[ ! -d $build_dir ]] && mkdir $build_dir
+
+# attempt to download linux-x.x.x.tar.xz kernel
+KERNEL_DOWNLOAD_TAR_URL="https://cdn.kernel.org/pub/linux/kernel/v$major_version.x/linux-$kernel_version.tar.xz"
+wget -c "$KERNEL_DOWNLOAD_TAR_URL" -P $build_dir
+
+if [[ $? -ne 0 ]]; then
+   # if first attempt fails, attempt to download linux-x.x.tar.xz kernel
+   kernel_version=$kernel_short_version
+   KERNEL_DOWNLOAD_TAR_URL="https://cdn.kernel.org/pub/linux/kernel/v$major_version.x/linux-$kernel_version.tar.xz"
+   wget -c "$KERNEL_DOWNLOAD_TAR_URL" -P $build_dir
+fi
+
+# if second attemps fails, attemp to download kernel from url provided by the script user
+[[ $? -ne 0 ]] &&
+{ echo "kernel could not be downloaded... Retry by manually writing the url of the kernel tar file." && read -p "IMPORTANT:
+
+So far, the download of the tar file failed... But : 
+
+If you are using a custom kernel (as for example the 'mainline'),
+please carefully copy/paste the link to the tarball (format tar.xz or tar.gz) file here and then type 'enter'.
+
+Be cautious, this is custom script adaptation without further checks...
+" KERNEL_DOWNLOAD_TAR_URL && wget -c "$KERNEL_DOWNLOAD_TAR_URL" -P $build_dir && FLAG_URL_PROVIDED_BY_USER="true"
+# Test is the third attempt to 'wget' returned an error and exit if so
+[[ $? -ne 0 ]] && echo "the custom kernel could not be downloaded...exiting" && exit
+}
+
+# Get the extension of tar file (+'tar.') : so tar.xz or tar.gz
+END_OF_TAR_FILE="${KERNEL_DOWNLOAD_TAR_URL%/}" # remove eventual ending slash
+BEGINNING_OF_URL_WITHOUT_END="${END_OF_TAR_FILE%tar.*}"
+END_OF_TAR_FILE="${END_OF_TAR_FILE##$BEGINNING_OF_URL_WITHOUT_END}"
+
+# Get the kernel version if it is special kernel or if provided manually
+if [ "$FLAG_URL_PROVIDED_BY_USER" = "true" ]
+then
+    kernel_version="${BEGINNING_OF_URL_WITHOUT_END##*/}"
+    kernel_version="${kernel_version##linux-}" # removing the 'linux-'
+    kernel_version="${kernel_version%.}" # removing any eventual ending dot
+fi
+
+# remove old kernel tar.xz archives
+find build/ -type f | grep -E linux.*.${END_OF_TAR_FILE} | grep -v $kernel_version.${END_OF_TAR_FILE} | xargs rm -f
+
+tar --strip-components=2 -xvf $build_dir/linux-$kernel_version.${END_OF_TAR_FILE} --directory=build/ linux-$kernel_version/drivers/bluetooth
+
+mv $bluetooth_dir/Makefile $bluetooth_dir/Makefile.orig
+cp -p $bluetooth_dir/hci_bcm.c $bluetooth_dir/hci_bcm.c.orig
+cp $patch_dir/Makefile $bluetooth_dir/
+[[ $(echo "$kernel_short_version" | grep '^5\.[0-1]$') ]] && cp $patch_dir/hci_bcm.kernel_5.0_5.1.c $bluetooth_dir/hci_bcm.c
+pushd $bluetooth_dir > /dev/null
+
+########################################### patch hci_bcm.c ###############################################
+#patch hci_bcm.c according to
+#https://github.com/christophgysin/linux/commit/ddf622a0a19697af473051c8019fffc1eb66efe7
+
+#hci_bcm.c
+#remove the following (consecutive) lines
+
+#       err = dev->set_device_wakeup(dev, powered);
+#       if (err)
+#               goto err_revert_shutdown;
+#
+
+sed -i '/err = dev->set_device_wakeup(dev, powered);/,+3 d' hci_bcm.c
+
+#err_revert_shutdown:
+#       dev->set_shutdown(dev, !powered);
+
+sed -i '/^err_revert_shutdown:$/,+1 d' hci_bcm.c
+###########################################################################################################
+popd > /dev/null
+
+update_dir="/lib/modules/$(uname -r)/updates"
+[[ ! -d $update_dir ]] && mkdir $update_dir
+make
+make install
+echo -e "\ncontents of $update_dir" && ls -lA $update_dir
+exit 0