RaspberryPi.md

Compile qcacld driver for RaspberryPi

Before compiling qcacld drivers for RaspberryPi, you have to prepare kernel. Here is official guide:

• Kernel building

Install Raspbian Stretch Lite to sdcard

1. Download Raspbian Stretch Lite image from Raspberry official site

2. Unzip the image

    unzip 2018-11-13-raspbian-stretch-lite.zip
   

3. Write the sdcard

   Insert SD card and check the name

    sudo fdisk -l
   

   In our case, the sdcard was named /dev/mmcblk0, then

    sudo dd if=2018-11-13-raspbian-stretch-lite.img of=/dev/mmcblk0
   

4. Optional Enable ssh

   Mount the sdcard boot partition

    sudo mount /dev/mmcblk0p1 /mnt
   

   Create file, that enables ssh

    sudo touch /mnt/ssh
   

   Unmount the partition

    sudo umount /mnt
   

Building the sources

1. Download sources

    mkdir RaspberryPi_Beans; cd RaspberryPi_Beans
    git clone https://github.com/raspberrypi/tools
    git clone https://github.com/raspberrypi/linux -b rpi-4.11.y
    git clone https://github.com/8devices/qcacld-2.0/ -b CNSS.LEA.NRT_3.0
   

2. Add toolchain to PATH

    export PATH=$PATH:$PWD/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin
   

3. Prepare Linux

    cd linux
    KERNEL=kernel7
    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig
   

   Enable nl80211 test mode:

    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
   
    Networking support -> Wireless -> nl80211 testmode command
   

   Save and exit

4. Patch kernel

    for i in ../qcacld-2.0/patches/kernel/v4.11/0* ; do patch -p1 < $i ; done
   

5. Build kernel

    make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules dtbs -j$(nproc)
   

6. Patch qcacld

    cd ../qcacld-2.0/
   

   Patch the sources

    patch -p1 < patches/RaspberryPi/0001-destructor_rename.patch
   

7. Build qcacld

    KERNEL_SRC=../linux/ ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make -j$(nproc)
    cd ..
   

Booting image

1. Mount boot partition

    sudo mount /dev/mmcblk0p1 /mnt
   

2. Transfer the kernel and device tree

    cd linux
    sudo cp /mnt/kernel7.img /mnt/kernel7-backup.img
    sudo cp arch/arm/boot/zImage /mnt/kernel7.img
    sudo cp arch/arm/boot/dts/*.dtb /mnt/
    sudo cp arch/arm/boot/dts/overlays/*.dtb* /mnt/overlays/
    sudo cp arch/arm/boot/dts/overlays/README /mnt/overlays/
   

3. Edit /boot/config.txt

    echo core_freq=250 | sudo tee --append /mnt/config.txt
    echo dtoverlay=sdio,poll_once=false | sudo tee --append /mnt/config.txt
   

4. Unmount the partition

    sudo umount /mnt
   

5. Install modules

    sudo mount /dev/mmcblk0p2 /mnt
    sudo make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=/mnt/ modules_install
    cd ../qcacld-2.0/
    sudo cp *.ko /mnt/home/pi/
   

   for USB:

    sudo cp -r firmware_bin/usb/* /mnt/lib/firmware/
   

   for SDIO:

    sudo cp -r firmware_bin/sdio/* /mnt/lib/firmware/
   
    sudo umount /mnt
   

6. Boot the image

   Insert the sdcard into Raspberry and power it up.

   Connect the device to the Raspberry and load module with command

    sudo insmod wlan-usb.ko
   

   or

    sudo insmod wlan-sdio.ko
   

   The interface should appear:

    pi@raspberrypi:~ $ ip l
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    	link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    	link/ether b8:27:eb:53:d0:9c brd ff:ff:ff:ff:ff:ff
    3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DORMANT group default qlen 1000
    	link/ether b8:27:eb:06:85:c9 brd ff:ff:ff:ff:ff:ff
    8: wlan1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 3000
    	link/ether c4:93:00:0f:7e:58 brd ff:ff:ff:ff:ff:ff
    9: p2p0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 3000
    	link/ether c6:93:00:90:7e:58 brd ff:ff:ff:ff:ff:ff