[xpadneo] Moved to it's own config. Adds an env var for steam.

system/features/bluetooth.nix

@@ -1,6 +1,9 @@
 { pkgs, ... }:
 {
+  # Enable bluetooth.
+  hardware.bluetooth.enable = true;
 
+  # Install the management service and packages.
   environment.systemPackages = with pkgs; [
     bluez
   ];

system/features/xpadneo.nix

@@ -0,0 +1,26 @@
+_: {
+  hardware = {
+    # Wireless xbox controllers
+    xpadneo = {
+      enable = true;
+      settings = {
+        disable_mouse = 1;
+      };
+    };
+
+    # Hardwired xbox controllers.
+    xone.enable = true;
+  };
+
+  # disable_ertm is required for xpadneo to connect properly and establish a
+  # data connection.  enable_autosuspend is to prevent Linux from putting the
+  # BT radio to sleep and causing a disconnect.
+  boot.extraModprobeConfig = ''
+    options bluetooth disable_ertm=1
+    options btusb enable_autosuspend=0
+  '';
+
+  # Steam also needs HID API to be off so SDL will read directly from evdev,
+  # otherwise it won't get any events from xpadneo.
+  environment.sessionVariables.SDL_JOYSTICK_HIDAPI = "0";
+}

system/hosts/altair/default.nix

@@ -11,6 +11,7 @@
     ../../features/gc.nix
     ../../features/gui.nix
     ../../features/virtualbox.nix
+    ../../features/xpadneo.nix
     ./configuration.nix
     ./hardware-configuration.nix
     ./qmk.nix

system/hosts/altair/hardware-configuration.nix

@@ -32,14 +32,6 @@
     };
     kernelModules = [ "kvm-intel" ];
     extraModulePackages = [ ];
-
-    # disable_ertm is required for xpadneo to connect properly and establish a
-    # data connection.  enable_autosuspend is to prevent Linux from putting the
-    # BT radio to sleep and causing a disconnect.
-    extraModprobeConfig = ''
-      options bluetooth disable_ertm=1
-      options btusb enable_autosuspend=0
-    '';
   };
 
   fileSystems = {
@@ -115,16 +107,6 @@
       # Enable the nvidia-settings menu?
       nvidiaSettings = true;
     };
-    # Wireless xbox controllers
-    xpadneo = {
-      enable = true;
-      settings = {
-        disable_mouse = 1;
-      };
-    };
-    # Hardwire xbox controllers.
-    xone.enable = true;
-    bluetooth.enable = true;
   };
 
   # Add a udev rule to prevent the mouse from waking the system.  Note that it