liminix

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zyxel-nwa-fit.nix (1741B)

      1 {
      2   config
      3 , pkgs
      4 , lib
      5 , ...
      6 }:
      7 let
      8   inherit (lib) mkIf mkEnableOption mkOption types concatStringsSep;
      9   models = "6b e1 6f e1 ff ff ff ff ff ff";
     10 in {
     11   options.system.outputs = {
     12     zyxel-nwa-fit = mkOption {
     13       type = types.package;
     14       description = ''
     15 zyxel-nwa-fit
     16 *************
     17 
     18 This output provides a FIT image for Zyxel NWA series
     19 containing a kernel image and an UBIFS rootfs.
     20 
     21 It can usually be used as a factory image to install Liminix
     22 on a system with pre-existing firmware and OS.
     23       '';
     24     };
     25   };
     26 
     27   imports = [
     28     ./ubivolume.nix
     29   ];
     30 
     31   config = mkIf (config.rootfsType == "ubifs") {
     32 
     33     system.outputs.zyxel-nwa-fit =
     34       let 
     35         o = config.system.outputs;
     36         # 8129kb padding.
     37         paddedKernel = pkgs.runCommand "padded-kernel" {} ''
     38           cp --no-preserve=mode ${o.uimage} $out
     39           dd if=/dev/zero of=$out bs=1 count=1 seek=8388607
     40         '';
     41         firmwareImage = pkgs.runCommand "firmware-image" {} ''
     42           cat ${paddedKernel} ${o.rootfs} > $out
     43         '';
     44         dts = pkgs.writeText "image.its" ''
     45         /dts-v1/;
     46 
     47         / {
     48           description = "Zyxel FIT (Flattened Image Tree)";
     49           compat-models = [${models}];
     50           #address-cells = <1>;
     51 
     52           images {
     53             firmware {
     54               data = /incbin/("${firmwareImage}");
     55               type = "firmware";
     56               compression = "none";
     57               hash@1 {
     58                 algo = "sha1";
     59               };
     60             };
     61           };
     62         };
     63       '';
     64       in
     65       pkgs.runCommand "zyxel-nwa-fit-${config.boot.imageType}" {
     66         nativeBuildInputs = [ pkgs.pkgsBuildBuild.ubootTools pkgs.pkgsBuildBuild.dtc ];
     67       } ''
     68         mkimage -f ${dts} $out
     69       '';
     70   };
     71 }