/*
 * Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef SPECTRAL_COMMON_H
#define SPECTRAL_COMMON_H

#define SPECTRAL_HT20_NUM_BINS          56
#define SPECTRAL_HT20_40_NUM_BINS               128

/* TODO: could possibly be 512, but no samples this large
 * could be acquired so far.
 */
#define SPECTRAL_ATH10K_MAX_NUM_BINS            256

/* FFT sample format given to userspace via debugfs.
 *
 * Please keep the type/length at the front position and change
 * other fields after adding another sample type
 *
 * TODO: this might need rework when switching to nl80211-based
 * interface.
 */
enum ath_fft_sample_type {
        ATH_FFT_SAMPLE_HT20 = 1,
        ATH_FFT_SAMPLE_HT20_40,
        ATH_FFT_SAMPLE_ATH10K,
        ATH_FFT_SAMPLE_ATH11K
};

struct fft_sample_tlv {
        u8 type;        /* see ath_fft_sample */
        __be16 length;
        /* type dependent data follows */
} __packed;

struct fft_sample_ht20 {
        struct fft_sample_tlv tlv;

        u8 max_exp;

        __be16 freq;
        s8 rssi;
        s8 noise;

        __be16 max_magnitude;
        u8 max_index;
        u8 bitmap_weight;

        __be64 tsf;

        u8 data[SPECTRAL_HT20_NUM_BINS];
} __packed;

struct fft_sample_ht20_40 {
        struct fft_sample_tlv tlv;

        u8 channel_type;
        __be16 freq;

        s8 lower_rssi;
        s8 upper_rssi;

        __be64 tsf;

        s8 lower_noise;
        s8 upper_noise;

        __be16 lower_max_magnitude;
        __be16 upper_max_magnitude;

        u8 lower_max_index;
        u8 upper_max_index;

        u8 lower_bitmap_weight;
        u8 upper_bitmap_weight;

        u8 max_exp;

        u8 data[SPECTRAL_HT20_40_NUM_BINS];
} __packed;

struct fft_sample_ath10k {
        struct fft_sample_tlv tlv;
        u8 chan_width_mhz;
        __be16 freq1;
        __be16 freq2;
        __be16 noise;
        __be16 max_magnitude;
        __be16 total_gain_db;
        __be16 base_pwr_db;
        __be64 tsf;
        s8 max_index;
        u8 rssi;
        u8 relpwr_db;
        u8 avgpwr_db;
        u8 max_exp;

        u8 data[];
} __packed;

struct fft_sample_ath11k {
        struct fft_sample_tlv tlv;
        u8 chan_width_mhz;
        s8 max_index;
        u8 max_exp;
        __be16 freq1;
        __be16 freq2;
        __be16 max_magnitude;
        __be16 rssi;
        __be32 tsf;
        __be32 noise;

        u8 data[];
} __packed;

#endif /* SPECTRAL_COMMON_H */