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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 : : #define SPECTRAL_HT20_SAMPLE_LEN (sizeof(struct ath_ht20_mag_info) +\
70 : : SPECTRAL_HT20_NUM_BINS)
71 : :
72 : : /* Dynamic 20/40 mode:
73 : : *
74 : : * [7:0]: lower bins {max_magnitude[1:0], bitmap_weight[5:0]}
75 : : * [7:0]: lower bins max_magnitude[9:2]
76 : : * [7:0]: lower bins {max_index[5:0], max_magnitude[11:10]}
77 : : * [7:0]: upper bins {max_magnitude[1:0], bitmap_weight[5:0]}
78 : : * [7:0]: upper bins max_magnitude[9:2]
79 : : * [7:0]: upper bins {max_index[5:0], max_magnitude[11:10]}
80 : : * [3:0]: max_exp (shift amount to size max bin to 8-bit unsigned)
81 : : */
82 : : struct ath_ht20_40_mag_info {
83 : : u8 lower_bins[3];
84 : : u8 upper_bins[3];
85 : : u8 max_exp;
86 : : } __packed;
87 : :
88 : : /* WARNING: don't actually use this struct! MAC may vary the amount of
89 : : * data. This struct is for reference only.
90 : : */
91 : : struct ath_ht20_40_fft_packet {
92 : : u8 data[SPECTRAL_HT20_40_NUM_BINS];
93 : : struct ath_ht20_40_mag_info mag_info;
94 : : struct ath_radar_info radar_info;
95 : : } __packed;
96 : :
97 : : struct ath_spec_scan_priv {
98 : : struct ath_hw *ah;
99 : : /* relay(fs) channel for spectral scan */
100 : : struct rchan *rfs_chan_spec_scan;
101 : : enum spectral_mode spectral_mode;
102 : : struct ath_spec_scan spec_config;
103 : : };
104 : :
105 : : #define SPECTRAL_HT20_40_TOTAL_DATA_LEN (sizeof(struct ath_ht20_40_fft_packet))
106 : : #define SPECTRAL_HT20_40_SAMPLE_LEN (sizeof(struct ath_ht20_40_mag_info) +\
107 : : SPECTRAL_HT20_40_NUM_BINS)
108 : :
109 : : #define SPECTRAL_SAMPLE_MAX_LEN SPECTRAL_HT20_40_SAMPLE_LEN
110 : :
111 : : /* grabs the max magnitude from the all/upper/lower bins */
112 : 0 : static inline u16 spectral_max_magnitude(u8 *bins)
113 : : {
114 : 0 : return (bins[0] & 0xc0) >> 6 |
115 : 0 : (bins[1] & 0xff) << 2 |
116 [ # # # # : 0 : (bins[2] & 0x03) << 10;
# # # # #
# ]
117 : : }
118 : :
119 : : /* return the max magnitude from the all/upper/lower bins */
120 : 0 : static inline u8 spectral_max_index(u8 *bins, int num_bins)
121 : : {
122 : 0 : s8 m = (bins[2] & 0xfc) >> 2;
123 : 0 : u8 zero_idx = num_bins / 2;
124 : :
125 : : /* It's a 5 bit signed int, remove its sign and use one's
126 : : * complement interpretation to add the sign back to the 8
127 : : * bit int
128 : : */
129 : 0 : if (m & 0x20) {
130 : 0 : m &= ~0x20;
131 : 0 : m |= 0xe0;
132 : : }
133 : :
134 : : /* Bring the zero point to the beginning
135 : : * instead of the middle so that we can use
136 : : * it for array lookup and that we don't deal
137 : : * with negative values later
138 : : */
139 : 0 : m += zero_idx;
140 : :
141 : : /* Sanity check to make sure index is within bounds */
142 [ # # # # : 0 : if (m < 0 || m > num_bins - 1)
# # # # ]
143 : 0 : m = 0;
144 : :
145 [ # # # # ]: 0 : return m;
146 : : }
147 : :
148 : 0 : static inline u8 spectral_max_index_ht40(u8 *bins)
149 : : {
150 : 0 : u8 idx;
151 : :
152 [ # # # # : 0 : idx = spectral_max_index(bins, SPECTRAL_HT20_40_NUM_BINS);
# # # # ]
153 : :
154 : : /* positive values and zero are starting at the beginning
155 : : * of the data field.
156 : : */
157 [ # # # # : 0 : return idx % (SPECTRAL_HT20_40_NUM_BINS / 2);
# # # # ]
158 : : }
159 : :
160 : 0 : static inline u8 spectral_max_index_ht20(u8 *bins)
161 : : {
162 [ # # # # ]: 0 : return spectral_max_index(bins, SPECTRAL_HT20_NUM_BINS);
163 : : }
164 : :
165 : : /* return the bitmap weight from the all/upper/lower bins */
166 : 0 : static inline u8 spectral_bitmap_weight(u8 *bins)
167 : : {
168 [ # # # # ]: 0 : return bins[0] & 0x3f;
169 : : }
170 : :
171 : : #ifdef CONFIG_ATH9K_COMMON_SPECTRAL
172 : : void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, struct dentry *debugfs_phy);
173 : : void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv);
174 : :
175 : : void ath9k_cmn_spectral_scan_trigger(struct ath_common *common,
176 : : struct ath_spec_scan_priv *spec_priv);
177 : : int ath9k_cmn_spectral_scan_config(struct ath_common *common,
178 : : struct ath_spec_scan_priv *spec_priv,
179 : : enum spectral_mode spectral_mode);
180 : : int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr,
181 : : struct ath_rx_status *rs, u64 tsf);
182 : : #else
183 : : static inline void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv,
184 : : struct dentry *debugfs_phy)
185 : : {
186 : : }
187 : :
188 : : static inline void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv)
189 : : {
190 : : }
191 : :
192 : : static inline void ath9k_cmn_spectral_scan_trigger(struct ath_common *common,
193 : : struct ath_spec_scan_priv *spec_priv)
194 : : {
195 : : }
196 : :
197 : : static inline int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv,
198 : : struct ieee80211_hdr *hdr,
199 : : struct ath_rx_status *rs, u64 tsf)
200 : : {
201 : : return 0;
202 : : }
203 : : #endif /* CONFIG_ATH9K_COMMON_SPECTRAL */
204 : :
205 : : #endif /* SPECTRAL_H */
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