liminix/modules/outputs/zyxel-nwa-fit.nix

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{
config
, pkgs
, lib
, ...
}:
let
inherit (lib) mkIf mkEnableOption mkOption types concatStringsSep;
models = "6b e1 6f e1 ff ff ff ff ff ff";
in {
options.system.outputs = {
zyxel-nwa-fit = mkOption {
type = types.package;
description = ''
zyxel-nwa-fit
*************
This output provides a FIT image for Zyxel NWA series
containing a kernel image and an UBIFS rootfs.
It can usually be used as a factory image to install Liminix
on a system with pre-existing firmware and OS.
'';
};
};
imports = [
./ubivolume.nix
];
config = mkIf (config.rootfsType == "ubifs") {
system.outputs.zyxel-nwa-fit =
let
o = config.system.outputs;
# 8129kb padding.
paddedKernel = pkgs.runCommand "padded-kernel" {} ''
cp --no-preserve=mode ${o.uimage} $out
dd if=/dev/zero of=$out bs=1 count=1 seek=8388607
'';
firmwareImage = pkgs.runCommand "firmware-image" {} ''
cat ${paddedKernel} ${o.rootfs} > $out
'';
dts = pkgs.writeText "image.its" ''
/dts-v1/;
/ {
description = "Zyxel FIT (Flattened Image Tree)";
compat-models = [${models}];
#address-cells = <1>;
images {
firmware {
data = /incbin/("${firmwareImage}");
type = "firmware";
compression = "none";
hash@1 {
algo = "sha1";
};
};
};
};
'';
in
pkgs.runCommand "zyxel-nwa-fit-${config.boot.imageType}" {
nativeBuildInputs = [ pkgs.pkgsBuildBuild.ubootTools pkgs.pkgsBuildBuild.dtc ];
} ''
mkimage -f ${dts} $out
'';
};
}