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diff --git a/samsung-ipc/device/xmm6260/io_helpers.h b/samsung-ipc/device/xmm6260/io_helpers.h
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+/*
+ * Firmware loader for Samsung I9100 and I9250
+ * Copyright (C) 2012 Alexander Tarasikov <alexander.tarasikov@gmail.com>
+ *
+ * based on the incomplete C++ implementation which is
+ * Copyright (C) 2012 Sergey Gridasov <grindars@gmail.com>
+ *
+ * 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 3 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/>.
+ */
+
+#ifndef __IO_HELPERS_H__
+#define __IO_HELPERS_H__
+
+#include "common.h"
+
+/* 
+ * @brief A wrapper around ioctl that prints the error to the log
+ *
+ * @param fd [in] File descriptor of the socket
+ * @param code [in] ioctl code
+ * @param data argument to the ioctl
+ * @return Negative value indicating error code
+ * @return ioctl call result
+ */
+int c_ioctl(int fd, unsigned long code, void* data);
+
+/* 
+ * @brief Waits for fd to become available for reading
+ *
+ * @param fd [in] File descriptor of the socket
+ * @param timeout [in] Timeout in milliseconds
+ * @return Negative value indicating error code
+ * @return Available socket number - 1, as select()
+ */
+int read_select(int fd, unsigned timeout);
+
+/* 
+ * @brief Waits for data available and reads it to the buffer
+ *
+ * @param fd [in] File descriptor of the socket
+ * @param buf Buffer to hold data
+ * @param size [in] The number of bytes to read
+ * @return Negative value indicating error code
+ * @return The size of data received
+ */
+int receive(int fd, void *buf, size_t size);
+
+/* 
+ * @brief Receives data and compares with the pattern in memory
+ *
+ * @param fd [in] File descriptor of the socket
+ * @param data [in] The pattern to compare to
+ * @param size [in] The length of data to read in bytes
+ * @return Negative value indicating error code
+ * @return Available socket number - 1, as select()
+ */
+int expect_data(int fd, void *data, size_t size);
+
+#endif //__IO_HELPERS_H__