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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 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * wlanfae <wlanfae@realtek.com> | |
23 | * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, | |
24 | * Hsinchu 300, Taiwan. | |
25 | * | |
26 | * Larry Finger <Larry.Finger@lwfinger.net> | |
27 | * | |
28 | *****************************************************************************/ | |
29 | #include "wifi.h" | |
30 | #include "stats.h" | |
31 | #include <linux/export.h> | |
32 | ||
33 | u8 rtl_query_rxpwrpercentage(char antpower) | |
34 | { | |
35 | if ((antpower <= -100) || (antpower >= 20)) | |
36 | return 0; | |
37 | else if (antpower >= 0) | |
38 | return 100; | |
39 | else | |
40 | return 100 + antpower; | |
41 | } | |
42 | EXPORT_SYMBOL(rtl_query_rxpwrpercentage); | |
43 | ||
44 | u8 rtl_evm_db_to_percentage(char value) | |
45 | { | |
46 | char ret_val; | |
47 | ret_val = value; | |
48 | ||
49 | if (ret_val >= 0) | |
50 | ret_val = 0; | |
51 | if (ret_val <= -33) | |
52 | ret_val = -33; | |
53 | ret_val = 0 - ret_val; | |
54 | ret_val *= 3; | |
55 | if (ret_val == 99) | |
56 | ret_val = 100; | |
57 | ||
58 | return ret_val; | |
59 | } | |
60 | EXPORT_SYMBOL(rtl_evm_db_to_percentage); | |
61 | ||
62 | static long rtl_translate_todbm(struct ieee80211_hw *hw, | |
63 | u8 signal_strength_index) | |
64 | { | |
65 | long signal_power; | |
66 | ||
67 | signal_power = (long)((signal_strength_index + 1) >> 1); | |
68 | signal_power -= 95; | |
69 | return signal_power; | |
70 | } | |
71 | ||
72 | long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig) | |
73 | { | |
74 | long retsig; | |
75 | ||
76 | if (currsig >= 61 && currsig <= 100) | |
77 | retsig = 90 + ((currsig - 60) / 4); | |
78 | else if (currsig >= 41 && currsig <= 60) | |
79 | retsig = 78 + ((currsig - 40) / 2); | |
80 | else if (currsig >= 31 && currsig <= 40) | |
81 | retsig = 66 + (currsig - 30); | |
82 | else if (currsig >= 21 && currsig <= 30) | |
83 | retsig = 54 + (currsig - 20); | |
84 | else if (currsig >= 5 && currsig <= 20) | |
85 | retsig = 42 + (((currsig - 5) * 2) / 3); | |
86 | else if (currsig == 4) | |
87 | retsig = 36; | |
88 | else if (currsig == 3) | |
89 | retsig = 27; | |
90 | else if (currsig == 2) | |
91 | retsig = 18; | |
92 | else if (currsig == 1) | |
93 | retsig = 9; | |
94 | else | |
95 | retsig = currsig; | |
96 | ||
97 | return retsig; | |
98 | } | |
99 | EXPORT_SYMBOL(rtl_signal_scale_mapping); | |
100 | ||
101 | static void rtl_process_ui_rssi(struct ieee80211_hw *hw, | |
102 | struct rtl_stats *pstatus) | |
103 | { | |
104 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
105 | struct rtl_phy *rtlphy = &(rtlpriv->phy); | |
106 | u8 rfpath; | |
107 | u32 last_rssi, tmpval; | |
108 | ||
109 | rtlpriv->stats.rssi_calculate_cnt++; | |
110 | ||
111 | if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) { | |
112 | rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX; | |
113 | last_rssi = rtlpriv->stats.ui_rssi.elements[ | |
114 | rtlpriv->stats.ui_rssi.index]; | |
115 | rtlpriv->stats.ui_rssi.total_val -= last_rssi; | |
116 | } | |
117 | rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength; | |
118 | rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] = | |
119 | pstatus->signalstrength; | |
120 | if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX) | |
121 | rtlpriv->stats.ui_rssi.index = 0; | |
122 | tmpval = rtlpriv->stats.ui_rssi.total_val / | |
123 | rtlpriv->stats.ui_rssi.total_num; | |
124 | rtlpriv->stats.signal_strength = rtl_translate_todbm(hw, | |
125 | (u8) tmpval); | |
126 | pstatus->rssi = rtlpriv->stats.signal_strength; | |
127 | ||
128 | if (pstatus->is_cck) | |
129 | return; | |
130 | ||
131 | for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath; | |
132 | rfpath++) { | |
133 | if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) { | |
134 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
135 | pstatus->rx_mimo_signalstrength[rfpath]; | |
136 | ||
137 | } | |
138 | if (pstatus->rx_mimo_signalstrength[rfpath] > | |
139 | rtlpriv->stats.rx_rssi_percentage[rfpath]) { | |
140 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
141 | ((rtlpriv->stats.rx_rssi_percentage[rfpath] * | |
142 | (RX_SMOOTH_FACTOR - 1)) + | |
143 | (pstatus->rx_mimo_signalstrength[rfpath])) / | |
144 | (RX_SMOOTH_FACTOR); | |
145 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
146 | rtlpriv->stats.rx_rssi_percentage[rfpath] + 1; | |
147 | } else { | |
148 | rtlpriv->stats.rx_rssi_percentage[rfpath] = | |
149 | ((rtlpriv->stats.rx_rssi_percentage[rfpath] * | |
150 | (RX_SMOOTH_FACTOR - 1)) + | |
151 | (pstatus->rx_mimo_signalstrength[rfpath])) / | |
152 | (RX_SMOOTH_FACTOR); | |
153 | } | |
154 | } | |
155 | } | |
156 | ||
157 | static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw, | |
158 | struct rtl_stats *pstatus) | |
159 | { | |
160 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
161 | int weighting = 0; | |
162 | ||
163 | if (rtlpriv->stats.recv_signal_power == 0) | |
164 | rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower; | |
165 | if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power) | |
166 | weighting = 5; | |
167 | else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power) | |
168 | weighting = (-5); | |
169 | rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power * | |
170 | 5 + pstatus->recvsignalpower + weighting) / 6; | |
171 | } | |
172 | ||
173 | static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus) | |
174 | { | |
175 | struct rtl_priv *rtlpriv = rtl_priv(hw); | |
176 | struct rtl_sta_info *drv_priv = NULL; | |
177 | struct ieee80211_sta *sta = NULL; | |
0f015453 | 178 | long undec_sm_pwdb; |
a2905935 LF |
179 | |
180 | rcu_read_lock(); | |
181 | if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION) | |
182 | sta = rtl_find_sta(hw, pstatus->psaddr); | |
183 | ||
184 | /* adhoc or ap mode */ | |
185 | if (sta) { | |
186 | drv_priv = (struct rtl_sta_info *) sta->drv_priv; | |
0f015453 | 187 | undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb; |
a2905935 | 188 | } else { |
0f015453 | 189 | undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb; |
a2905935 LF |
190 | } |
191 | ||
0f015453 LF |
192 | if (undec_sm_pwdb < 0) |
193 | undec_sm_pwdb = pstatus->rx_pwdb_all; | |
194 | if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) { | |
195 | undec_sm_pwdb = (((undec_sm_pwdb) * | |
a2905935 LF |
196 | (RX_SMOOTH_FACTOR - 1)) + |
197 | (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR); | |
0f015453 | 198 | undec_sm_pwdb = undec_sm_pwdb + 1; |
a2905935 | 199 | } else { |
0f015453 | 200 | undec_sm_pwdb = (((undec_sm_pwdb) * (RX_SMOOTH_FACTOR - 1)) + |
a2905935 LF |
201 | (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR); |
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++] = | |
234 | pstatus->signalquality; | |
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, | |
258 | struct rtl_stats *pstatus) | |
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); |