htc: implement complete usb driver

libraries/libstratosphere/source/htclow/driver/htclow_usb_impl.hpp

@@ -0,0 +1,41 @@
+/*
+ * 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 <stratosphere.hpp>
+
+namespace ams::htclow::driver {
+
+    enum UsbAvailability {
+        UsbAvailability_Unavailable = 1,
+        UsbAvailability_Available   = 2,
+        UsbAvailability_Unknown     = 3,
+    };
+
+    using UsbAvailabilityChangeCallback = void (*)(UsbAvailability availability, void *param);
+
+    void SetUsbAvailabilityChangeCallback(UsbAvailabilityChangeCallback callback, void *param);
+    void ClearUsbAvailabilityChangeCallback();
+
+    Result InitializeUsbInterface();
+    void FinalizeUsbInterface();
+
+    Result SendUsb(int *out_transferred, const void *src, int src_size);
+    Result ReceiveUsb(int *out_transferred, void *dst, int dst_size);
+
+    void CancelUsbSendReceive();
+
+
+}