The purpose of this repository is to provide support for building the CSI-enabled Wi-Fi drivers for Intel Wireless Link 5300 adapters on Linux distributions with newer kernel versions. At this point this code has been tested on Ubuntu 16.04 and Ubuntu 18.04 with kernel version 4.15. More tests are expected soon.
The code presented here comprises of a modified version of the Linux kernel. The modifications were made by examining the code provided by dhalperi/linux-80211n-csitool and adapting them to more recent Linux kernel versions - iwlwifi module. The building and installation instructions were taken from the original Linux 802.11n CSI Tool website and adapted accordingly.
Before proceeding further, you need to check the version of your kernel. It should be 4.15, otherwise the commands below won't work. The following command will print that information:
$ uname -r$ sudo apt install build-essential linux-headers-$(uname -r) git-coreNewer kernels require compilers with retpoline supports. GCC and G++ version 7.3 and above support that feature. The example below shows how to install GCC/G++ version 8:
$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test
$ sudo apt update
$ sudo apt install gcc-8 g++-8You need to ensure that the make command uses the right version of the compilers. You can use either of these two ways do it
Check where the current links point to. The command
$ ls -l /usr/bin/gcc /usr/bin/g++should generate an output similar to
lrwxrwxrwx 1 root 5 Mar 27 2018 /usr/bin/g++ -> g++-5
lrwxrwxrwx 1 root 5 Mar 27 2018 /usr/bin/gcc -> gcc-5The current links are pointing to version 5. So they need to be redirected to version 8. To do that, remove the current links
$ sudo rm /usr/bin/gcc
$ sudo rm /usr/bin/g++and create the new ones
$ sudo ln -s /usr/bin/gcc-8 /usr/bin/gcc
$ sudo ln -s /usr/bin/g++-8 /usr/bin/g++Clone the modified Linux kernel code
$ git clone https://github.com/spanev/linux-80211n-csitool.git
$ cd linux-80211n-csitoolCheckout the correct release version
$ CSITOOL_KERNEL_TAG=csitool-$(uname -r | cut -d . -f 1-2)
$ git checkout ${CSITOOL_KERNEL_TAG}
Build the modified driver for the existing kernel
$ make -j `nproc` -C /lib/modules/$(uname -r)/build M=$(pwd)/drivers/net/wireless/intel/iwlwifi modules$ sudo make -C /lib/modules/$(uname -r)/build M=$(pwd)/drivers/net/wireless/intel/iwlwifi \
> INSTALL_MOD_DIR=updates modules_installRemark: If during the execution of the command above you get error messages similar to
- SSL error:02001002:system library:fopen:No such file or directory: bss_file.c:175 - SSL error:2006D080:BIO routines:BIO_new_file:no such file: bss_file.c:178 sign-file: certs/signing_key.pem: No such file or directorydo not worry. The operating system complains, because the driver doesn't have a SSL signature. That won't interfere with the driver installation. Therefore, simply ignore the messages and continue with the installation process.
$ sudo depmod
$ cd ..Obtain the CSI Tool supplementary material:
$ git clone https://github.com/dhalperi/linux-80211n-csitool-supplementary.gitRelocate any existing firmware for Intel Wi-Fi Link 5000 Series adapters:
$ for file in /lib/firmware/iwlwifi-5000-*.ucode; do sudo mv $file $file.orig; doneInstall the modified firmware:
$ sudo cp linux-80211n-csitool-supplementary/firmware/iwlwifi-5000-2.ucode.sigcomm2010 /lib/firmware/
$ sudo ln -s iwlwifi-5000-2.ucode.sigcomm2010 /lib/firmware/iwlwifi-5000-2.ucodeIn order to conduct tests with the newly installed driver, please refer to the original CSI Tool website's installation instructions, Section 4 and 5.
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