Funtoo on the Nvidia TK1

Introduction

Read this.

And this

And this.

Getting the Sources

Use the tools issued by Nvidia to handle kernel sources via git. Checkout the desired kernel version, which probably should match the version of the driver package (RXX-X), update the environment variables and create a branch named by the kernel version.

root # wget http://developer.nvidia.com/embedded/dlc/l4t-Jetson-TK1-Driver-Package-R21-5 -O $TOOLS/l4t-Jetson-TK1-Driver-Package-R21-5
root # cd $TOOLS
root # tar jxf l4t-Jetson-TK1-Driver-Package-R21-5
root # rm l4t-Jetson-TK1-Driver-Package-R21-5
root # cd Linux_for_Tegra
root # ./source_sync.sh  #skip tag selection both times
root # cd sources/kernel_source
root # git ls-remote
root # git checkout tegra-l4t-r21.5
root # ln -s $PWD $XC_KERNEL_SRC
root # . xcompile_variables.sh
root # git checkout -b `get_kernel_version`

Kernel Building

You need a working kernel config. You can get one from a running TK1 and get it into your $XC_KERNEL_SRC directory.

root # zcat /proc/config.gz > my_TK1_config
root # scp my_TK1_config <xc_user>@<xc_host>:~
root # cp ~/my_TK1_config $CONFIGS/`get_kernel_version`.kconf

Or you can get it from the kernel headers.

root # cd $TOOLS/Linux_for_Tegra/kernel
root # tar xvf kernel_headers.tbz2
root # cp linux-headers-<kernel_version>/.config $CONFIGS/`get_kernel_version`.kconf

Make the Kernel

root # . xcompile_variables.sh
root # cd $XC_KERNEL_SRC
root # cp $XC_KERNEL_OLDCONFIG .config
root # ARCH=$ARCH CROSS_COMPILE=$CROSSDEV_TARGET- make oldconfig
root # ARCH=$ARCH CROSS_COMPILE=$CROSSDEV_TARGET- make zImage modules dtbs

Download and Configure Stage3

See http://www.funtoo.org/Crossdev_Automation#Stage3_Configuration

Don't configure fstab and leave a serial console configured on ttyS2 in $XC_STAGES/etc/inittab.

root # echo "# UNCONFIGURED FSTAB FOR BASE SYSTEM" > $XC_STAGE3S/fstab

Install Super Special Blobs

This probably messes with portage, but we have to do it. Dissecting apply_binaries.sh is a good idea.

root # cd $TOOLS/Linux_for_Tegra
root # rmdir rootfs
root # ln -s $XC_STAGE3S rootfs
root # ./apply_binaries.sh

Copy over Everything

root # cd $XC_KERNEL_SRC
root # ARCH=$ARCH CROSS_COMPILE=$CROSSDEV_TARGET- INSTALL_MOD_PATH=$XC_STAGE3S INSTALL_MOD_STRIP=1 make modules_install
root # ARCH=$ARCH CROSS_COMPILE=$CROSSDEV_TARGET- INSTALL_MOD_PATH=$XC_STAGE3S make firmware_install
root # rsync -avz $XC_FIRMWARE/ $XC_STAGE3S/lib/firmware
root # rsync -avz arch/arm/boot/zImage $XC_STAGE3S/boot
root # rsync -avz arch/arm/boot/dts/*.dtb $XC_STAGE3S/boot
root # rm $XC_STAGE3S/lib/modules/`get_kernel_release`/{build,source}

Flash the TK1

Put your system into “reset recovery mode” by holding down the “RECOVERY” button and press “RESET” button once on the main board.

Ensure your Linux host system is connected to the target device through the USB cable for flashing.

root # lsusb | grep -i nvidia
Bus 003 Device 002: ID 0955:7140 NVidia Corp.

Cross your fingers.

root # cd $TOOLS
root # ./flash.sh -S 8GiB jetson-tk1 mmcblk0p1
copying bctfile(/usr/src/fun_kernel/tools/TK1/Linux_for_Tegra/bootloader/ardbeg/BCT/PM375_Hynix_2GB_H5TC4G63AFR_H5TC4G63CFR_RDA_924MHz.cfg)... done.
copying bootloader(/usr/src/fun_kernel/tools/TK1/Linux_for_Tegra/bootloader/ardbeg/u-boot.bin)... done.
	populating kernel to rootfs... done.
	populating jetson-tk1_extlinux.conf.emmc to rootfs... done.
done.
...<lots o output>...
Create, format and download  took 1907 Secs
Time taken for flashing 1912 Secs
*** The target ardbeg has been flashed successfully. ***
Reset the board to boot from internal eMMC.

New doorstop?