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+/*
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+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
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+ *
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+ * Permission to use, copy, modify, and/or distribute this software for any
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+ * purpose with or without fee is hereby granted, provided that the above
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+ * copyright notice and this permission notice appear in all copies.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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+ */
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+
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+#ifndef SPECTRAL_COMMON_H
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+#define SPECTRAL_COMMON_H
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+
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+#define SPECTRAL_HT20_NUM_BINS 56
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+#define SPECTRAL_HT20_40_NUM_BINS 128
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+
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+/* FFT sample format given to userspace via debugfs.
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+ *
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+ * Please keep the type/length at the front position and change
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+ * other fields after adding another sample type
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+ *
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+ * TODO: this might need rework when switching to nl80211-based
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+ * interface.
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+ */
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+enum ath_fft_sample_type {
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+ ATH_FFT_SAMPLE_HT20 = 1,
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+ ATH_FFT_SAMPLE_HT20_40,
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+};
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+
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+struct fft_sample_tlv {
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+ u8 type; /* see ath_fft_sample */
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+ __be16 length;
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+ /* type dependent data follows */
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+} __packed;
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+
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+struct fft_sample_ht20 {
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+ struct fft_sample_tlv tlv;
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+
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+ u8 max_exp;
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+
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+ __be16 freq;
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+ s8 rssi;
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+ s8 noise;
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+
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+ __be16 max_magnitude;
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+ u8 max_index;
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+ u8 bitmap_weight;
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+
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+ __be64 tsf;
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+
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+ u8 data[SPECTRAL_HT20_NUM_BINS];
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+} __packed;
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+
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+struct fft_sample_ht20_40 {
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+ struct fft_sample_tlv tlv;
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+
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+ u8 channel_type;
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+ __be16 freq;
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+
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+ s8 lower_rssi;
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+ s8 upper_rssi;
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+
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+ __be64 tsf;
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+
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+ s8 lower_noise;
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+ s8 upper_noise;
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+
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+ __be16 lower_max_magnitude;
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+ __be16 upper_max_magnitude;
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+
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+ u8 lower_max_index;
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+ u8 upper_max_index;
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+
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+ u8 lower_bitmap_weight;
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+ u8 upper_bitmap_weight;
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+
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+ u8 max_exp;
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+
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+ u8 data[SPECTRAL_HT20_40_NUM_BINS];
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+} __packed;
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+
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+#endif /* SPECTRAL_COMMON_H */
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