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diff --git a/src/qmi-firmware-update/qfu-helpers.h b/src/qmi-firmware-update/qfu-helpers.h
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+++ b/src/qmi-firmware-update/qfu-helpers.h
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+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * qmi-firmware-update -- Command line tool to update firmware in QMI devices
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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/>.
+ *
+ * Copyright (C) 2016 Zodiac Inflight Innovations
+ * Copyright (C) 2016-2017 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#ifndef QFU_HELPERS_H
+#define QFU_HELPERS_H
+
+#include "config.h"
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+typedef enum {
+    QFU_HELPERS_DEVICE_TYPE_TTY,
+    QFU_HELPERS_DEVICE_TYPE_CDC_WDM,
+    QFU_HELPERS_DEVICE_TYPE_LAST
+} QfuHelpersDeviceType;
+
+const gchar *qfu_helpers_device_type_to_string (QfuHelpersDeviceType type);
+
+#if defined WITH_UDEV
+
+gchar *qfu_udev_helper_find_by_file          (GFile        *file,
+                                              GError      **error);
+gchar *qfu_udev_helper_find_by_file_path     (const gchar  *path,
+                                              GError      **error);
+gchar *qfu_udev_helper_find_peer_port        (const gchar  *sysfs_path,
+                                              GError      **error);
+gchar *qfu_udev_helper_find_by_device_info   (guint16       vid,
+                                              guint16       pid,
+                                              guint         busnum,
+                                              guint         devnum,
+                                              GError      **error);
+
+GList *qfu_udev_helper_list_devices           (QfuHelpersDeviceType   device_type,
+                                               const gchar           *sysfs_path);
+
+void   qfu_udev_helper_wait_for_device        (QfuHelpersDeviceType   device_type,
+                                               const gchar           *sysfs_path,
+                                               const gchar           *peer_port,
+                                               GCancellable          *cancellable,
+                                               GAsyncReadyCallback    callback,
+                                               gpointer               user_data);
+GFile *qfu_udev_helper_wait_for_device_finish (GAsyncResult          *res,
+                                               GError               **error);
+
+typedef struct _QfuUdevHelperGenericMonitor QfuUdevHelperGenericMonitor;
+QfuUdevHelperGenericMonitor *qfu_udev_helper_generic_monitor_new  (const gchar *sysfs_path);
+void                         qfu_udev_helper_generic_monitor_free (QfuUdevHelperGenericMonitor *self);
+
+#endif
+
+G_END_DECLS
+
+#endif /* QFU_HELPERS_H */