sdmmc: add DeviceDetector, gpio: implement client api

libraries/libstratosphere/include/stratosphere/ddsf/ddsf_types.hpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <vapours.hpp>
+
+namespace ams::ddsf {
+
+    enum AccessMode {
+        AccessMode_None  = (0u << 0),
+        AccessMode_Read  = (1u << 0),
+        AccessMode_Write = (1u << 1),
+
+        AccessMode_ReadWrite = AccessMode_Read | AccessMode_Write,
+    };
+
+}