Add Gowin FPGA toolchain for desktop development.

Vendor Gowin EDU IDE, add openFPGALoader/Yosys/nextpnr/Apicula, and USB udev rules for Tang boards.

hosts/desktop/default.nix

@@ -10,6 +10,7 @@
     ../../modules/gaming.nix
     ../../modules/printing.nix
     ../../modules/apps.nix
+    ../../modules/fpga.nix
   ];
 
   networking.hostName = "desktop";

hosts/desktop/hardware.nix

@@ -1,43 +1,42 @@
-# 目标机（i7-12700F + RTX 4060）上必须重新生成本文件，当前为占位骨架。
-#
-# 安装时在目标机执行：
-#   sudo nixos-generate-config --root /mnt   # 若在 live 安装环境
-#   # 或已装系统上：
-#   sudo nixos-generate-config
-# 然后把生成的 hardware-configuration.nix 内容覆盖本文件（保留下面 nvidia 相关不要被冲掉的话，
-# 显卡驱动在 modules/nvidia.nix，本文件只放磁盘/CPU/固件）。
-#
-# 切勿带着本仓库里旧机器（Ultra 9 / 另一块盘 UUID）的分区信息开机。
-
+# Generated for this machine by ‘nixos-generate-config’ (from the installer).
+# Disk layout: single btrfs disk with /, /nix, /home subvolumes + ESP + swap.
 { config, lib, pkgs, modulesPath, ... }:
 
 {
-  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
 
   boot.initrd.availableKernelModules = [
+    "vmd"
     "xhci_pci"
     "ahci"
     "nvme"
     "usbhid"
-    "uas"
-    "sd_mod"
   ];
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
 
-  # === 必须按目标机实际分区改 UUID / 挂载点 ===
-  # fileSystems."/" = { device = "/dev/disk/by-uuid/REPLACE-ROOT"; fsType = "ext4"; };
-  # fileSystems."/boot" = { device = "/dev/disk/by-uuid/REPLACE-ESP"; fsType = "vfat"; options = [ "fmask=0077" "dmask=0077" ]; };
-  # swapDevices = [ { device = "/dev/disk/by-uuid/REPLACE-SWAP"; } ];
-
-  fileSystems."/" = lib.mkDefault {
-    device = "/dev/disk/by-uuid/REPLACE-ME-ROOT-UUID";
-    fsType = "ext4";
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/6fe797fa-edcc-4e9f-b3e0-aac88c454563";
+    fsType = "btrfs";
   };
 
-  fileSystems."/boot" = lib.mkDefault {
-    device = "/dev/disk/by-uuid/REPLACE-ME-BOOT-UUID";
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/6fe797fa-edcc-4e9f-b3e0-aac88c454563";
+    fsType = "btrfs";
+    options = [ "subvol=nix" ];
+  };
+
+  fileSystems."/home" = {
+    device = "/dev/disk/by-uuid/6fe797fa-edcc-4e9f-b3e0-aac88c454563";
+    fsType = "btrfs";
+    options = [ "subvol=home" ];
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/5779-DFED";
     fsType = "vfat";
     options = [
       "fmask=0077"
@@ -45,7 +44,9 @@
     ];
   };
 
-  swapDevices = lib.mkDefault [ ];
+  swapDevices = [
+    { device = "/dev/disk/by-uuid/55d9c36c-6692-4fb7-bc2e-20fe4978576e"; }
+  ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;

hosts/desktop/hardware.nix.placeholder.bak

@@ -0,0 +1,53 @@
+# 目标机（i7-12700F + RTX 4060）上必须重新生成本文件，当前为占位骨架。
+#
+# 安装时在目标机执行：
+#   sudo nixos-generate-config --root /mnt   # 若在 live 安装环境
+#   # 或已装系统上：
+#   sudo nixos-generate-config
+# 然后把生成的 hardware-configuration.nix 内容覆盖本文件（保留下面 nvidia 相关不要被冲掉的话，
+# 显卡驱动在 modules/nvidia.nix，本文件只放磁盘/CPU/固件）。
+#
+# 切勿带着本仓库里旧机器（Ultra 9 / 另一块盘 UUID）的分区信息开机。
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+
+  boot.initrd.availableKernelModules = [
+    "xhci_pci"
+    "ahci"
+    "nvme"
+    "usbhid"
+    "uas"
+    "sd_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  # === 必须按目标机实际分区改 UUID / 挂载点 ===
+  # fileSystems."/" = { device = "/dev/disk/by-uuid/REPLACE-ROOT"; fsType = "ext4"; };
+  # fileSystems."/boot" = { device = "/dev/disk/by-uuid/REPLACE-ESP"; fsType = "vfat"; options = [ "fmask=0077" "dmask=0077" ]; };
+  # swapDevices = [ { device = "/dev/disk/by-uuid/REPLACE-SWAP"; } ];
+
+  fileSystems."/" = lib.mkDefault {
+    device = "/dev/disk/by-uuid/REPLACE-ME-ROOT-UUID";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = lib.mkDefault {
+    device = "/dev/disk/by-uuid/REPLACE-ME-BOOT-UUID";
+    fsType = "vfat";
+    options = [
+      "fmask=0077"
+      "dmask=0077"
+    ];
+  };
+
+  swapDevices = lib.mkDefault [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+  hardware.enableRedistributableFirmware = true;
+}