em100: init at unstable-2022-05-02-86631c9

maintainers/maintainer-list.nix

@@ -698,6 +698,15 @@
     githubId = 5149377;
     name = "Amine Chikhaoui";
   };
+  amjoseph = {
+    name = "Adam Megacz Joseph";
+    email = "adam@westernsemico.com";
+    github = "amjoseph-nixpkgs";
+    githubId = 54836058;
+    keys = [{
+      fingerprint = "AD25 6548 09B0 F2A5 D246  1AFF E702 47B6 4C13 EEBE";
+    }];
+  };
   amorsillo = {
     email = "andrew.morsillo@gmail.com";
     github = "AndrewMorsillo";

pkgs/misc/drivers/em100/default.nix

@@ -0,0 +1,68 @@
+{ lib
+, stdenv
+, curl
+, pkg-config
+, libusb
+, fetchgit
+}:
+stdenv.mkDerivation rec {
+  pname = "em100";
+  version = "unstable-2022-05-02-86631c9";   # upstream does not appear to have formal releases
+  src = fetchgit {
+    url  = "https://review.coreboot.org/em100";
+    rev  = "7cd8c935239ab63ea7dd583183d8144e38c42186";
+    hash = "sha256-zKRVhqNHtgVj6JDkTV+6GEjmM1FICqQr286uTXwUvpo=";
+  };
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  buildInputs = [
+    libusb
+    curl    # for optionally downloading firmware images
+  ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    install -m 750 em100 $out/bin/em100
+    mkdir -p $out/lib/udev/rules.d/
+    install -m 644 60-dediprog-em100pro.rules $out/lib/udev/rules.d/
+    runHook postInstall
+    '';
+
+  meta = with lib; {
+    homepage = "https://www.coreboot.org/EM100pro";
+    description = "Allows operating a Dediprog EM100Pro SPI NOR Flash Emulator";
+    longDescription =  # copied from README
+      ''
+      This tool supports using the Dediprog EM100-Pro [1] in Linux. It supports both
+      the original version and the new -G2 variant.
+
+      The 'em100' device provides a way to emulate a SPI-flash chip. Various
+      connectors are available to allow it to take over from the in-circuit SPI chip
+      so that the SoC sees the em100's internal memory as the contents of the SPI
+      flash. Images can be loaded into the em100 over USB in a few seconds, thus
+      providing a much faster development cycle than is possible by reprogramming
+      the SPI flash each time.
+
+      Major features provided by the tool include:
+
+      - Set the chip being emulated (the tool supports about 600)
+      - Adjust the state of the hold pin, which supports overriding the internal SPI
+      - Use of several em100 devices, distinguished by their serial number
+      - Terminal mode, allowing the SoC to send messages
+      - Output a trace of SPI commands issued by the SoC
+      - Reading / writing em100 firmware (dangerous as it can brick your em100)
+
+      [1] https://www.dediprog.com/product/EM100Pro-G2
+      '';
+    license = licenses.gpl2Plus;
+    sourceProvenance = [ lib.sourceTypes.fromSource ];
+    maintainers = with maintainers; [ amjoseph ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -34009,6 +34009,8 @@ with pkgs;
 
   terminal-parrot = callPackage ../applications/misc/terminal-parrot { };
 
+  em100 = callPackage ../misc/drivers/em100 { };
+
   epson-alc1100 = callPackage ../misc/drivers/epson-alc1100 { };
 
   epson-escpr = callPackage ../misc/drivers/epson-escpr { };