From 5051632234d256135f63c89a87b4a5137a9d4ad6 Mon Sep 17 00:00:00 2001
From: Karolis Stasaitis <contact@carlossless.io>
Date: Sat, 18 Oct 2025 12:10:33 +0200
Subject: [PATCH] intel/compute-stick/stck1a: init

---
 README.md                                     |  1 +
 flake.nix                                     |  1 +
 intel/compute-stick/stck1a/README.md          |  8 ++++
 intel/compute-stick/stck1a/default.nix        |  8 ++++
 .../stck1a/dsl/sd-slot-cd-gpio-fix.dsl        | 29 +++++++++++
 intel/compute-stick/stck1a/sd-slot-fix.nix    | 48 +++++++++++++++++++
 6 files changed, 95 insertions(+)
 create mode 100644 intel/compute-stick/stck1a/README.md
 create mode 100644 intel/compute-stick/stck1a/default.nix
 create mode 100644 intel/compute-stick/stck1a/dsl/sd-slot-cd-gpio-fix.dsl
 create mode 100644 intel/compute-stick/stck1a/sd-slot-fix.nix

diff --git a/README.md b/README.md
index cb5134948..269ee6caf 100644
--- a/README.md
+++ b/README.md
@@ -234,6 +234,7 @@ See code for all available configurations.
 | [HP Probook 460G11](hp/probook/460g11)                                            | `<nixos-hardware/hp/probook/460g11>`                    | `hp-probook-46011`                     |
 | [Huawei Matebook X Pro (2020)](huawei/machc-wa)                                   | `<nixos-hardware/huawei/machc-wa>`                      | `huawei-machc-wa`                      |
 | [i.MX8QuadMax Multisensory Enablement Kit](nxp/imx8qm-mek/)                       | `<nixos-hardware/nxp/imx8qm-mek>`                       | `nxp-imx8qm-mek`                       |
+| [Intel Compute Stick STCK1A](intel/compute-stick/stck1a/)                         | `<nixos-hardware/intel/compute-stick/stck1a>`           | `intel-compute-stick-stck1a`           |
 | [Intel NUC 5i5RYB](intel/nuc/5i5ryb/)                                             | `<nixos-hardware/intel/nuc/5i5ryb>`                     | `intel-nuc-5i5ryb`                     |
 | [Intel NUC 8i7BEH](intel/nuc/8i7beh/)                                             | `<nixos-hardware/intel/nuc/8i7beh>`                     | `intel-nuc-8i7beh`                     |
 | [Kobol Helios4](kobol/helios4)                                                    | `<nixos-hardware/kobol/helios4>`                        | `kobol-helios-4`                       |
diff --git a/flake.nix b/flake.nix
index 32fb1e0f8..b9c0ecb1c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -166,6 +166,7 @@
           hp-laptop-14s-dq2024nf = import ./hp/laptop/14s-dq2024nf;
           huawei-machc-wa = import ./huawei/machc-wa;
           hp-notebook-14-df0023 = import ./hp/notebook/14-df0023;
+          intel-compute-stick-stck1a = import ./intel/compute-stick/stck1a;
           intel-nuc-5i5ryb = import ./intel/nuc/5i5ryb;
           intel-nuc-8i7beh = import ./intel/nuc/8i7beh;
           lenovo-ideacentre-k330 = import ./lenovo/ideacentre/k330;
diff --git a/intel/compute-stick/stck1a/README.md b/intel/compute-stick/stck1a/README.md
new file mode 100644
index 000000000..f8d534d09
--- /dev/null
+++ b/intel/compute-stick/stck1a/README.md
@@ -0,0 +1,8 @@
+# Intel Compute Stick (STCK1A)
+
+## Supported Devices
+
+* STCK1A32WFC
+* STCK1A32WFCR
+* STCK1A32WFCL
+* STCK1A8LFC
diff --git a/intel/compute-stick/stck1a/default.nix b/intel/compute-stick/stck1a/default.nix
new file mode 100644
index 000000000..eeed4d18e
--- /dev/null
+++ b/intel/compute-stick/stck1a/default.nix
@@ -0,0 +1,8 @@
+{ lib, pkgs, ... }:
+
+{
+  imports = [
+    ../../../common/cpu/intel/bay-trail
+    ./sd-slot-fix.nix
+  ];
+}
diff --git a/intel/compute-stick/stck1a/dsl/sd-slot-cd-gpio-fix.dsl b/intel/compute-stick/stck1a/dsl/sd-slot-cd-gpio-fix.dsl
new file mode 100644
index 000000000..92215ea76
--- /dev/null
+++ b/intel/compute-stick/stck1a/dsl/sd-slot-cd-gpio-fix.dsl
@@ -0,0 +1,29 @@
+DefinitionBlock ("sd-slot-cd-gpio-fix.aml", "SSDT", 5, "NIXOS", "SDHDFIX", 0x00000001)
+{
+    External (\_SB.SDHD, DeviceObj)
+
+    Scope (\_SB.SDHD)
+    {
+        Name (_DSD, Package ()
+        {
+            ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+            Package ()
+            {
+                /*
+                 * The sdhci-acpi driver expects a cd (card-detect) GPIO
+                 * from the first Gpio/GpioInt entry in the device's _CRS.
+                 *
+                 * Unfortunately, the first entry is a GpioInt, which the driver
+                 * cannot use for card detection (it only supports plain Gpio).
+                 *
+                 * As a result, the driver fails to detect the SD card.
+                 *
+                 * This SSDT patch explicitly directs the driver to use
+                 * the second Gpio resource (index 1), which is the correct
+                 * Gpio entry for card detection.
+                 */
+                Package () { "gpios", Package () { ^SDHD, 1, 0, 0 } },
+            }
+        })
+    }
+}
diff --git a/intel/compute-stick/stck1a/sd-slot-fix.nix b/intel/compute-stick/stck1a/sd-slot-fix.nix
new file mode 100644
index 000000000..63eaaf23f
--- /dev/null
+++ b/intel/compute-stick/stck1a/sd-slot-fix.nix
@@ -0,0 +1,48 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.hardware.intel.compute-stick.stck1a.sd-slot-fix;
+  sd-slot-fix-overlay-initrd = pkgs.stdenv.mkDerivation {
+    name = "sd-slot-fix-overlay-initrd";
+    src = ./dsl;
+
+    phases = [
+      "unpackPhase"
+      "installPhase"
+    ];
+
+    nativeBuildInputs = with pkgs; [
+      acpica-tools
+      cpio
+    ];
+
+    installPhase = ''
+      mkdir -p kernel/firmware/acpi
+
+      iasl -sa sd-slot-cd-gpio-fix.dsl
+
+      cp sd-slot-cd-gpio-fix.aml kernel/firmware/acpi/
+      find kernel | cpio -H newc --create > $out
+    '';
+  };
+in
+{
+  options.hardware = {
+    intel.compute-stick.stck1a.sd-slot-fix = {
+      enable = lib.mkEnableOption ''
+        fix for the Intel Compute Stick STCK1A SD slot.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    boot.initrd.prepend = [
+      (toString sd-slot-fix-overlay-initrd)
+    ];
+  };
+}