nixos: add Omnia LEDs module

1 files changed, 152 insertions, 0 deletions

diff --git a/nixos/modules/turris-omnialeds.nix b/nixos/modules/turris-omnialeds.nix
new file mode 100644
index 0000000..8063eb6
--- /dev/null
+++ b/nixos/modules/turris-omnialeds.nix
@@ -0,0 +1,152 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.turris.omnialeds;
+
+  ledConfig = {name, trigger ? "none", netdevName ? null, color}: {
+    enabled = mkOption {
+      type = types.bool;
+      default = true;
+      description = "If LED should be enabled at all";
+    };
+    brightness = mkOption {
+      type = types.ints.u8;
+      default = 255;
+      description = "Set brightness intensity";
+    };
+    color = let 
+      clr = c: mkOption {
+        type = types.ints.u8;
+        default = color.${c};
+        description = "Set intensity for the color ${c}";
+      };
+    in {
+      red = clr "red";
+      green = clr "green";
+      blue = clr "blue";
+    };
+    trigger = mkOption {
+      type = types.str;
+      default = trigger;
+      description = "Trigger for the LED";
+    };
+    # netdev trigger
+    netdevName = mkOption {
+      type = with types; nullOr str;
+      default = netdevName;
+      description = ''
+        Name of the network device to trigger when trigger is set to `netdev`
+      '';
+    };
+  };
+  lanConfig = i: ledConfig {
+    name = "lan${toString i}";
+    trigger = "netdev";
+    netdevName = "lan${toString i}";
+    color = {
+      red = 255; green = 255; blue = 0;
+    };
+  };
+  wlanConfig = i: ledConfig {
+    name = "wlan${toString i}";
+    color = {
+      red = 0; green = 255; blue = 255;
+    };
+  };
+  indicatorConfig = i: ledConfig {
+    name = "indicator${toString i}";
+    color = {
+      red = 0; green = 255; blue = 255;
+    };
+  };
+
+  ledSetup = sysname: lcfg: ''
+    echo ${toString lcfg.brightness} > /sys/class/leds/rgb:${sysname}/brightness
+    echo ${toString lcfg.color.red} ${toString lcfg.color.green} ${toString lcfg.color.blue} > /sys/class/leds/rgb:${sysname}/multi_intensity
+    echo ${lcfg.trigger} > /sys/class/leds/rgb:${sysname}/trigger
+    ${optionalString (lcfg.trigger == "netdev") "echo '${lcfg.netdevName}' > /sys/class/leds/rgb:${sysname}/device_name"}
+  '';
+
+in {
+
+  options = {
+    turris.omnialeds = {
+      enabled = mkOption {
+        type = types.bool;
+        default = true;
+        description = "If Omnia LEDs setup should be enabled or not.";
+      };
+      brightness = mkOption {
+        type = with types; nullOr (ints.between 0 100);
+        default = null;
+        description = "Global brightness (overrides brightness set by the front button)";
+      };
+      power = ledConfig {
+        name = "power";
+        trigger = "heartbeat";
+        color = {
+          red = 0; green = 255; blue = 0;
+        };
+      };
+      wan = ledConfig {
+        name = "wan";
+        trigger = "netdev";
+        netdevName = "eth2";
+        color = {
+          red = 0; green = 255; blue = 0;
+        };
+      };
+      lan0 = lanConfig 0;
+      lan1 = lanConfig 1;
+      lan2 = lanConfig 2;
+      lan3 = lanConfig 3;
+      lan4 = lanConfig 4;
+      wlan1 = wlanConfig 1;
+      wlan2 = wlanConfig 2;
+      wlan3 = wlanConfig 3;
+      indicator1 = indicatorConfig 1;
+      indicator2 = indicatorConfig 2;
+      extraCommands = mkOption {
+        type = types.lines;
+        default = "";
+        description = "Extra commands executed to setup LEDs";
+      };
+    };
+  };
+
+  config = mkIf (config.turris.board == "omnia" && cfg.enabled) {
+
+    # TODO modprobe triggers only if required
+    boot.kernelModules = [
+      "ledtrig_tty" "ledtrig_activity" "ledtrig_pattern" "ledtrig_netdev"
+      "ledtrig_usbport"
+    ];
+
+    systemd.services."omnia-leds" = {
+      script = ''
+        ${optionalString (cfg.brightness != null)
+          "echo ${toString cfg.brightness} > /sys/devices/platform/soc/soc:internal-regs/f1011000.i2c/i2c-0/i2c-1/1-002b/brightness"}
+        ${ledSetup "power" cfg.power}
+        ${ledSetup "wan" cfg.wan}
+        ${ledSetup "lan-0" cfg.lan0}
+        ${ledSetup "lan-1" cfg.lan1}
+        ${ledSetup "lan-2" cfg.lan2}
+        ${ledSetup "lan-3" cfg.lan3}
+        ${ledSetup "lan-4" cfg.lan4}
+        ${ledSetup "wlan-1" cfg.wlan1}
+        ${ledSetup "wlan-2" cfg.wlan2}
+        ${ledSetup "wlan-3" cfg.wlan3}
+        ${ledSetup "indicator-1" cfg.indicator1}
+        ${ledSetup "indicator-2" cfg.indicator2}
+
+        # Extra commands
+        ${cfg.extraCommands}
+      '';
+      wantedBy = [ "multi-user.target" ];
+    };
+
+  };
+}