1 /* 2 * Copyright (c) 2013 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #ifndef SPECTRAL_H 18 #define SPECTRAL_H 19 20 #include "../spectral_common.h" 21 22 /* enum spectral_mode: 23 * 24 * @SPECTRAL_DISABLED: spectral mode is disabled 25 * @SPECTRAL_BACKGROUND: hardware sends samples when it is not busy with 26 * something else. 27 * @SPECTRAL_MANUAL: spectral scan is enabled, triggering for samples 28 * is performed manually. 29 * @SPECTRAL_CHANSCAN: Like manual, but also triggered when changing channels 30 * during a channel scan. 31 */ 32 enum spectral_mode { 33 SPECTRAL_DISABLED = 0, 34 SPECTRAL_BACKGROUND, 35 SPECTRAL_MANUAL, 36 SPECTRAL_CHANSCAN, 37 }; 38 39 #define SPECTRAL_SCAN_BITMASK 0x10 40 /* Radar info packet format, used for DFS and spectral formats. */ 41 struct ath_radar_info { 42 u8 pulse_length_pri; 43 u8 pulse_length_ext; 44 u8 pulse_bw_info; 45 } __packed; 46 47 /* The HT20 spectral data has 4 bytes of additional information at it's end. 48 * 49 * [7:0]: all bins {max_magnitude[1:0], bitmap_weight[5:0]} 50 * [7:0]: all bins max_magnitude[9:2] 51 * [7:0]: all bins {max_index[5:0], max_magnitude[11:10]} 52 * [3:0]: max_exp (shift amount to size max bin to 8-bit unsigned) 53 */ 54 struct ath_ht20_mag_info { 55 u8 all_bins[3]; 56 u8 max_exp; 57 } __packed; 58 59 /* WARNING: don't actually use this struct! MAC may vary the amount of 60 * data by -1/+2. This struct is for reference only. 61 */ 62 struct ath_ht20_fft_packet { 63 u8 data[SPECTRAL_HT20_NUM_BINS]; 64 struct ath_ht20_mag_info mag_info; 65 struct ath_radar_info radar_info; 66 } __packed; 67 68 #define SPECTRAL_HT20_TOTAL_DATA_LEN (sizeof(struct ath_ht20_fft_packet)) 69 70 /* Dynamic 20/40 mode: 71 * 72 * [7:0]: lower bins {max_magnitude[1:0], bitmap_weight[5:0]} 73 * [7:0]: lower bins max_magnitude[9:2] 74 * [7:0]: lower bins {max_index[5:0], max_magnitude[11:10]} 75 * [7:0]: upper bins {max_magnitude[1:0], bitmap_weight[5:0]} 76 * [7:0]: upper bins max_magnitude[9:2] 77 * [7:0]: upper bins {max_index[5:0], max_magnitude[11:10]} 78 * [3:0]: max_exp (shift amount to size max bin to 8-bit unsigned) 79 */ 80 struct ath_ht20_40_mag_info { 81 u8 lower_bins[3]; 82 u8 upper_bins[3]; 83 u8 max_exp; 84 } __packed; 85 86 /* WARNING: don't actually use this struct! MAC may vary the amount of 87 * data. This struct is for reference only. 88 */ 89 struct ath_ht20_40_fft_packet { 90 u8 data[SPECTRAL_HT20_40_NUM_BINS]; 91 struct ath_ht20_40_mag_info mag_info; 92 struct ath_radar_info radar_info; 93 } __packed; 94 95 struct ath_spec_scan_priv { 96 struct ath_hw *ah; 97 /* relay(fs) channel for spectral scan */ 98 struct rchan *rfs_chan_spec_scan; 99 enum spectral_mode spectral_mode; 100 struct ath_spec_scan spec_config; 101 }; 102 103 #define SPECTRAL_HT20_40_TOTAL_DATA_LEN (sizeof(struct ath_ht20_40_fft_packet)) 104 105 /* grabs the max magnitude from the all/upper/lower bins */ 106 static inline u16 spectral_max_magnitude(u8 *bins) 107 { 108 return (bins[0] & 0xc0) >> 6 | 109 (bins[1] & 0xff) << 2 | 110 (bins[2] & 0x03) << 10; 111 } 112 113 /* return the max magnitude from the all/upper/lower bins */ 114 static inline u8 spectral_max_index(u8 *bins) 115 { 116 s8 m = (bins[2] & 0xfc) >> 2; 117 118 /* TODO: this still doesn't always report the right values ... */ 119 if (m > 32) 120 m |= 0xe0; 121 else 122 m &= ~0xe0; 123 124 return m + 29; 125 } 126 127 /* return the bitmap weight from the all/upper/lower bins */ 128 static inline u8 spectral_bitmap_weight(u8 *bins) 129 { 130 return bins[0] & 0x3f; 131 } 132 133 void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, struct dentry *debugfs_phy); 134 void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv); 135 136 void ath9k_cmn_spectral_scan_trigger(struct ath_common *common, 137 struct ath_spec_scan_priv *spec_priv); 138 int ath9k_cmn_spectral_scan_config(struct ath_common *common, 139 struct ath_spec_scan_priv *spec_priv, 140 enum spectral_mode spectral_mode); 141 int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr, 142 struct ath_rx_status *rs, u64 tsf); 143 144 #endif /* SPECTRAL_H */ 145