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205 lines
6.1 KiB
205 lines
6.1 KiB
/* |
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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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#ifndef SPECTRAL_H |
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#define SPECTRAL_H |
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#include "../spectral_common.h" |
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/* enum spectral_mode: |
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* |
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* @SPECTRAL_DISABLED: spectral mode is disabled |
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* @SPECTRAL_BACKGROUND: hardware sends samples when it is not busy with |
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* something else. |
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* @SPECTRAL_MANUAL: spectral scan is enabled, triggering for samples |
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* is performed manually. |
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* @SPECTRAL_CHANSCAN: Like manual, but also triggered when changing channels |
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* during a channel scan. |
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*/ |
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enum spectral_mode { |
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SPECTRAL_DISABLED = 0, |
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SPECTRAL_BACKGROUND, |
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SPECTRAL_MANUAL, |
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SPECTRAL_CHANSCAN, |
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}; |
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#define SPECTRAL_SCAN_BITMASK 0x10 |
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/* Radar info packet format, used for DFS and spectral formats. */ |
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struct ath_radar_info { |
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u8 pulse_length_pri; |
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u8 pulse_length_ext; |
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u8 pulse_bw_info; |
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} __packed; |
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/* The HT20 spectral data has 4 bytes of additional information at it's end. |
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* |
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* [7:0]: all bins {max_magnitude[1:0], bitmap_weight[5:0]} |
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* [7:0]: all bins max_magnitude[9:2] |
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* [7:0]: all bins {max_index[5:0], max_magnitude[11:10]} |
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* [3:0]: max_exp (shift amount to size max bin to 8-bit unsigned) |
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*/ |
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struct ath_ht20_mag_info { |
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u8 all_bins[3]; |
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u8 max_exp; |
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} __packed; |
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/* WARNING: don't actually use this struct! MAC may vary the amount of |
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* data by -1/+2. This struct is for reference only. |
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*/ |
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struct ath_ht20_fft_packet { |
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u8 data[SPECTRAL_HT20_NUM_BINS]; |
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struct ath_ht20_mag_info mag_info; |
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struct ath_radar_info radar_info; |
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} __packed; |
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#define SPECTRAL_HT20_TOTAL_DATA_LEN (sizeof(struct ath_ht20_fft_packet)) |
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#define SPECTRAL_HT20_SAMPLE_LEN (sizeof(struct ath_ht20_mag_info) +\ |
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SPECTRAL_HT20_NUM_BINS) |
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/* Dynamic 20/40 mode: |
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* |
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* [7:0]: lower bins {max_magnitude[1:0], bitmap_weight[5:0]} |
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* [7:0]: lower bins max_magnitude[9:2] |
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* [7:0]: lower bins {max_index[5:0], max_magnitude[11:10]} |
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* [7:0]: upper bins {max_magnitude[1:0], bitmap_weight[5:0]} |
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* [7:0]: upper bins max_magnitude[9:2] |
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* [7:0]: upper bins {max_index[5:0], max_magnitude[11:10]} |
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* [3:0]: max_exp (shift amount to size max bin to 8-bit unsigned) |
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*/ |
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struct ath_ht20_40_mag_info { |
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u8 lower_bins[3]; |
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u8 upper_bins[3]; |
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u8 max_exp; |
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} __packed; |
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/* WARNING: don't actually use this struct! MAC may vary the amount of |
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* data. This struct is for reference only. |
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*/ |
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struct ath_ht20_40_fft_packet { |
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u8 data[SPECTRAL_HT20_40_NUM_BINS]; |
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struct ath_ht20_40_mag_info mag_info; |
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struct ath_radar_info radar_info; |
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} __packed; |
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struct ath_spec_scan_priv { |
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struct ath_hw *ah; |
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/* relay(fs) channel for spectral scan */ |
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struct rchan *rfs_chan_spec_scan; |
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enum spectral_mode spectral_mode; |
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struct ath_spec_scan spec_config; |
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}; |
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#define SPECTRAL_HT20_40_TOTAL_DATA_LEN (sizeof(struct ath_ht20_40_fft_packet)) |
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#define SPECTRAL_HT20_40_SAMPLE_LEN (sizeof(struct ath_ht20_40_mag_info) +\ |
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SPECTRAL_HT20_40_NUM_BINS) |
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#define SPECTRAL_SAMPLE_MAX_LEN SPECTRAL_HT20_40_SAMPLE_LEN |
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/* grabs the max magnitude from the all/upper/lower bins */ |
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static inline u16 spectral_max_magnitude(u8 *bins) |
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{ |
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return (bins[0] & 0xc0) >> 6 | |
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(bins[1] & 0xff) << 2 | |
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(bins[2] & 0x03) << 10; |
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} |
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/* return the max magnitude from the all/upper/lower bins */ |
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static inline u8 spectral_max_index(u8 *bins, int num_bins) |
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{ |
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s8 m = (bins[2] & 0xfc) >> 2; |
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u8 zero_idx = num_bins / 2; |
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/* It's a 5 bit signed int, remove its sign and use one's |
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* complement interpretation to add the sign back to the 8 |
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* bit int |
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*/ |
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if (m & 0x20) { |
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m &= ~0x20; |
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m |= 0xe0; |
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} |
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/* Bring the zero point to the beginning |
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* instead of the middle so that we can use |
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* it for array lookup and that we don't deal |
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* with negative values later |
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*/ |
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m += zero_idx; |
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/* Sanity check to make sure index is within bounds */ |
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if (m < 0 || m > num_bins - 1) |
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m = 0; |
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return m; |
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} |
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static inline u8 spectral_max_index_ht40(u8 *bins) |
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{ |
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u8 idx; |
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idx = spectral_max_index(bins, SPECTRAL_HT20_40_NUM_BINS); |
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/* positive values and zero are starting at the beginning |
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* of the data field. |
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*/ |
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return idx % (SPECTRAL_HT20_40_NUM_BINS / 2); |
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} |
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static inline u8 spectral_max_index_ht20(u8 *bins) |
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{ |
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return spectral_max_index(bins, SPECTRAL_HT20_NUM_BINS); |
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} |
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/* return the bitmap weight from the all/upper/lower bins */ |
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static inline u8 spectral_bitmap_weight(u8 *bins) |
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{ |
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return bins[0] & 0x3f; |
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} |
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#ifdef CONFIG_ATH9K_COMMON_SPECTRAL |
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void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, struct dentry *debugfs_phy); |
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void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv); |
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void ath9k_cmn_spectral_scan_trigger(struct ath_common *common, |
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struct ath_spec_scan_priv *spec_priv); |
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int ath9k_cmn_spectral_scan_config(struct ath_common *common, |
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struct ath_spec_scan_priv *spec_priv, |
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enum spectral_mode spectral_mode); |
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int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr, |
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struct ath_rx_status *rs, u64 tsf); |
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#else |
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static inline void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, |
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struct dentry *debugfs_phy) |
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{ |
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} |
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static inline void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv) |
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{ |
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} |
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static inline void ath9k_cmn_spectral_scan_trigger(struct ath_common *common, |
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struct ath_spec_scan_priv *spec_priv) |
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{ |
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} |
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static inline int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, |
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struct ieee80211_hdr *hdr, |
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struct ath_rx_status *rs, u64 tsf) |
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{ |
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return 0; |
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} |
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#endif /* CONFIG_ATH9K_COMMON_SPECTRAL */ |
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#endif /* SPECTRAL_H */
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