Commit | Line | Data |
---|---|---|
a2905935 LF |
1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2009-2012 Realtek Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
a2905935 LF |
14 | * The full GNU General Public License is included in this distribution in the |
15 | * file called LICENSE. | |
16 | * | |
17 | * Contact Information: | |
18 | * wlanfae <wlanfae@realtek.com> | |
19 | * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, | |
20 | * Hsinchu 300, Taiwan. | |
21 | * | |
22 | * Larry Finger <Larry.Finger@lwfinger.net> | |
23 | * | |
24 | *****************************************************************************/ | |
25 | #include "wifi.h" | |
26 | #include "stats.h" | |
27 | #include <linux/export.h> | |
28 | ||
08aba42f | 29 | u8 rtl_query_rxpwrpercentage(s8 antpower) |
a2905935 LF |
30 | { |
31 | if ((antpower <= -100) || (antpower >= 20)) | |
32 | return 0; | |
33 | else if (antpower >= 0) | |
34 | return 100; | |
35 | else | |
36 | return 100 + antpower; | |
37 | } | |
38 | EXPORT_SYMBOL(rtl_query_rxpwrpercentage); | |
39 | ||
08aba42f | 40 | u8 rtl_evm_db_to_percentage(s8 value) |
a2905935 | 41 | { |
08aba42f | 42 | s8 ret_val = clamp(-value, 0, 33) * 3; |
a2905935 | 43 | |
a2905935 LF |
44 | if (ret_val == 99) |
45 | ret_val = 100; | |
46 | ||
47 | return ret_val; | |
48 | } | |
49 | EXPORT_SYMBOL(rtl_evm_db_to_percentage); | |
50 | ||
51 | static long rtl_translate_todbm(struct ieee80211_hw *hw, | |
f3a97e93 | 52 | u8 signal_strength_index) |
a2905935 LF |
53 | { |
54 | long signal_power; | |
55 | ||
56 | signal_power = (long)((signal_strength_index + 1) >> 1); | |
57 | signal_power -= 95; | |
58 | return signal_power; | |
59 | } | |
60 | ||
61 | long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig) | |
62 | { | |
63 | long retsig; | |
64 | ||
65 | if (currsig >= 61 && currsig <= 100) | |
66 | retsig = 90 + ((currsig - 60) / 4); | |
67 | else if (currsig >= 41 && currsig <= 60) | |
68 | retsig = 78 + ((currsig - 40) / 2); | |
69 | else if (currsig >= 31 && currsig <= 40) | |
70 | retsig = 66 + (currsig - 30); | |
71 | else if (currsig >= 21 && currsig <= 30) | |
72 | retsig = 54 + (currsig - 20); | |
73 | else if (currsig >= 5 && currsig <= 20) | |
74 | retsig = 42 + (((currsig - 5) * 2) / 3); | |
75 | else if (currsig == 4) | |
76 | retsig = 36; | |
77 | else if (currsig == 3) | |
78 | retsig = 27; | |
79 | else if (currsig == 2) | |
80 | retsig = 18; | |
81 | else if (currsig == 1) | |
82 | retsig = 9; | |
83 | else | |
84 | retsig = currsig; | |
85 | ||
86 | return retsig; | |
87 | } | |
88 | EXPORT_SYMBOL(rtl_signal_scale_mapping); | |
89 | ||
90 | static void rtl_process_ui_rssi(struct ieee80211_hw *hw, | |
91 | struct rtl_stats *pstatus) | |
92 | { | |
93 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
94 | struct rtl_phy *rtlphy = &(rtlpriv->phy); | |
95 | u8 rfpath; | |
96 | u32 last_rssi, tmpval; | |
97 | ||
f3a97e93 LF |
98 | if (!pstatus->packet_toself && !pstatus->packet_beacon) |
99 | return; | |
100 | ||
101 | rtlpriv->stats.pwdb_all_cnt += pstatus->rx_pwdb_all; | |
a2905935 LF |
102 | rtlpriv->stats.rssi_calculate_cnt++; |
103 | ||
104 | if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) { | |
105 | rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX; | |
106 | last_rssi = rtlpriv->stats.ui_rssi.elements[ | |
107 | rtlpriv->stats.ui_rssi.index]; | |
108 | rtlpriv->stats.ui_rssi.total_val -= last_rssi; | |
109 | } | |
110 | rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength; | |
111 | rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] = | |
112 | pstatus->signalstrength; | |
113 | if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX) | |
114 | rtlpriv->stats.ui_rssi.index = 0; | |
115 | tmpval = rtlpriv->stats.ui_rssi.total_val / | |
116 | rtlpriv->stats.ui_rssi.total_num; | |
117 | rtlpriv->stats.signal_strength = rtl_translate_todbm(hw, | |
118 | (u8) tmpval); | |
119 | pstatus->rssi = rtlpriv->stats.signal_strength; | |
120 | ||
121 | if (pstatus->is_cck) | |
122 | return; | |
123 | ||
124 | for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath; | |
125 | rfpath++) { | |
126 | if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) { | |
127 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
128 | pstatus->rx_mimo_signalstrength[rfpath]; | |
129 | ||
130 | } | |
131 | if (pstatus->rx_mimo_signalstrength[rfpath] > | |
132 | rtlpriv->stats.rx_rssi_percentage[rfpath]) { | |
133 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
134 | ((rtlpriv->stats.rx_rssi_percentage[rfpath] * | |
135 | (RX_SMOOTH_FACTOR - 1)) + | |
136 | (pstatus->rx_mimo_signalstrength[rfpath])) / | |
137 | (RX_SMOOTH_FACTOR); | |
138 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
139 | rtlpriv->stats.rx_rssi_percentage[rfpath] + 1; | |
140 | } else { | |
141 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
142 | ((rtlpriv->stats.rx_rssi_percentage[rfpath] * | |
143 | (RX_SMOOTH_FACTOR - 1)) + | |
144 | (pstatus->rx_mimo_signalstrength[rfpath])) / | |
145 | (RX_SMOOTH_FACTOR); | |
146 | } | |
f3a97e93 LF |
147 | rtlpriv->stats.rx_snr_db[rfpath] = pstatus->rx_snr[rfpath]; |
148 | rtlpriv->stats.rx_evm_dbm[rfpath] = | |
149 | pstatus->rx_mimo_evm_dbm[rfpath]; | |
150 | rtlpriv->stats.rx_cfo_short[rfpath] = | |
151 | pstatus->cfo_short[rfpath]; | |
152 | rtlpriv->stats.rx_cfo_tail[rfpath] = pstatus->cfo_tail[rfpath]; | |
a2905935 LF |
153 | } |
154 | } | |
155 | ||
156 | static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw, | |
157 | struct rtl_stats *pstatus) | |
158 | { | |
159 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
160 | int weighting = 0; | |
161 | ||
162 | if (rtlpriv->stats.recv_signal_power == 0) | |
163 | rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower; | |
164 | if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power) | |
165 | weighting = 5; | |
166 | else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power) | |
167 | weighting = (-5); | |
168 | rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power * | |
169 | 5 + pstatus->recvsignalpower + weighting) / 6; | |
170 | } | |
171 | ||
172 | static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus) | |
173 | { | |
174 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
175 | struct rtl_sta_info *drv_priv = NULL; | |
176 | struct ieee80211_sta *sta = NULL; | |
0f015453 | 177 | long undec_sm_pwdb; |
a2905935 LF |
178 | |
179 | rcu_read_lock(); | |
180 | if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION) | |
181 | sta = rtl_find_sta(hw, pstatus->psaddr); | |
182 | ||
183 | /* adhoc or ap mode */ | |
184 | if (sta) { | |
185 | drv_priv = (struct rtl_sta_info *) sta->drv_priv; | |
0f015453 | 186 | undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb; |
a2905935 | 187 | } else { |
0f015453 | 188 | undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb; |
a2905935 LF |
189 | } |
190 | ||
0f015453 LF |
191 | if (undec_sm_pwdb < 0) |
192 | undec_sm_pwdb = pstatus->rx_pwdb_all; | |
193 | if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) { | |
194 | undec_sm_pwdb = (((undec_sm_pwdb) * | |
a2905935 LF |
195 | (RX_SMOOTH_FACTOR - 1)) + |
196 | (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR); | |
0f015453 | 197 | undec_sm_pwdb = undec_sm_pwdb + 1; |
a2905935 | 198 | } else { |
f3a97e93 | 199 | undec_sm_pwdb = (((undec_sm_pwdb) * |
d82403a9 LF |
200 | (RX_SMOOTH_FACTOR - 1)) + |
201 | (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR); | |
a2905935 LF |
202 | } |
203 | ||
204 | if (sta) { | |
0f015453 | 205 | drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb; |
a2905935 | 206 | } else { |
0f015453 | 207 | rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb; |
a2905935 LF |
208 | } |
209 | rcu_read_unlock(); | |
210 | ||
211 | rtl_update_rxsignalstatistics(hw, pstatus); | |
212 | } | |
213 | ||
214 | static void rtl_process_ui_link_quality(struct ieee80211_hw *hw, | |
215 | struct rtl_stats *pstatus) | |
216 | { | |
217 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
218 | u32 last_evm, n_stream, tmpval; | |
219 | ||
220 | if (pstatus->signalquality == 0) | |
221 | return; | |
222 | ||
223 | if (rtlpriv->stats.ui_link_quality.total_num++ >= | |
224 | PHY_LINKQUALITY_SLID_WIN_MAX) { | |
225 | rtlpriv->stats.ui_link_quality.total_num = | |
226 | PHY_LINKQUALITY_SLID_WIN_MAX; | |
227 | last_evm = rtlpriv->stats.ui_link_quality.elements[ | |
228 | rtlpriv->stats.ui_link_quality.index]; | |
229 | rtlpriv->stats.ui_link_quality.total_val -= last_evm; | |
230 | } | |
231 | rtlpriv->stats.ui_link_quality.total_val += pstatus->signalquality; | |
232 | rtlpriv->stats.ui_link_quality.elements[ | |
233 | rtlpriv->stats.ui_link_quality.index++] = | |
f3a97e93 | 234 | pstatus->signalquality; |
a2905935 LF |
235 | if (rtlpriv->stats.ui_link_quality.index >= |
236 | PHY_LINKQUALITY_SLID_WIN_MAX) | |
237 | rtlpriv->stats.ui_link_quality.index = 0; | |
238 | tmpval = rtlpriv->stats.ui_link_quality.total_val / | |
239 | rtlpriv->stats.ui_link_quality.total_num; | |
240 | rtlpriv->stats.signal_quality = tmpval; | |
241 | rtlpriv->stats.last_sigstrength_inpercent = tmpval; | |
242 | for (n_stream = 0; n_stream < 2; n_stream++) { | |
243 | if (pstatus->rx_mimo_sig_qual[n_stream] != -1) { | |
244 | if (rtlpriv->stats.rx_evm_percentage[n_stream] == 0) { | |
245 | rtlpriv->stats.rx_evm_percentage[n_stream] = | |
246 | pstatus->rx_mimo_sig_qual[n_stream]; | |
247 | } | |
248 | rtlpriv->stats.rx_evm_percentage[n_stream] = | |
249 | ((rtlpriv->stats.rx_evm_percentage[n_stream] | |
250 | * (RX_SMOOTH_FACTOR - 1)) + | |
251 | (pstatus->rx_mimo_sig_qual[n_stream] * 1)) / | |
252 | (RX_SMOOTH_FACTOR); | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
257 | void rtl_process_phyinfo(struct ieee80211_hw *hw, u8 *buffer, | |
f3a97e93 | 258 | struct rtl_stats *pstatus) |
a2905935 LF |
259 | { |
260 | ||
261 | if (!pstatus->packet_matchbssid) | |
262 | return; | |
263 | ||
264 | rtl_process_ui_rssi(hw, pstatus); | |
265 | rtl_process_pwdb(hw, pstatus); | |
266 | rtl_process_ui_link_quality(hw, pstatus); | |
267 | } | |
268 | EXPORT_SYMBOL(rtl_process_phyinfo); |