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diff --git a/radio_impl.h b/radio_impl.h
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+/*
+ * Copyright (C) 2017 Konsulko Group
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _RADIO_IMPL_H
+#define _RADIO_IMPL_H
+
+#include <stdint.h>
+
+typedef enum {
+	BAND_AM = 0,
+	BAND_FM
+} radio_band_t;
+
+typedef enum {
+	SCAN_FORWARD = 0,
+	SCAN_BACKWARD
+} radio_scan_direction_t;
+
+typedef void (*radio_scan_callback_t)(uint32_t frequency, void *data);
+
+typedef void (*radio_freq_callback_t)(uint32_t frequency, void *data);
+
+typedef enum {
+	MONO = 0,
+	STEREO
+} radio_stereo_mode_t;
+
+int radio_impl_init(void);
+
+uint32_t radio_impl_get_frequency(void);
+
+void radio_impl_set_frequency(uint32_t frequency);
+
+void radio_impl_set_frequency_callback(radio_freq_callback_t callback,
+				       void *data);
+
+radio_band_t radio_impl_get_band(void);
+
+void radio_impl_set_band(radio_band_t band);
+
+int radio_impl_band_supported(radio_band_t band);
+
+uint32_t radio_impl_get_min_frequency(radio_band_t band);
+
+uint32_t radio_impl_get_max_frequency(radio_band_t band);
+
+uint32_t radio_impl_get_frequency_step(radio_band_t band);
+
+void radio_impl_start(void);
+
+void radio_impl_stop(void);
+
+void radio_impl_scan_start(radio_scan_direction_t direction,
+			   radio_scan_callback_t callback,
+			   void *data);
+
+void radio_impl_scan_stop(void);
+
+radio_stereo_mode_t radio_impl_get_stereo_mode(void);
+
+void radio_impl_set_stereo_mode(radio_stereo_mode_t mode);
+
+#endif /* _RADIO_IMPL_H */