283 lines
8.4 KiB
C
283 lines
8.4 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2009-2012 Realtek Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* wlanfae <wlanfae@realtek.com>
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* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
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* Hsinchu 300, Taiwan.
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*
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* Larry Finger <Larry.Finger@lwfinger.net>
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*
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*****************************************************************************/
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#include "wifi.h"
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#include "stats.h"
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#include <linux/export.h>
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u8 rtl_query_rxpwrpercentage(char antpower)
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{
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if ((antpower <= -100) || (antpower >= 20))
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return 0;
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else if (antpower >= 0)
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return 100;
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else
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return 100 + antpower;
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}
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EXPORT_SYMBOL(rtl_query_rxpwrpercentage);
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u8 rtl_evm_db_to_percentage(char value)
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{
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char ret_val;
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ret_val = value;
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if (ret_val >= 0)
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ret_val = 0;
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if (ret_val <= -33)
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ret_val = -33;
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ret_val = 0 - ret_val;
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ret_val *= 3;
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if (ret_val == 99)
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ret_val = 100;
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return ret_val;
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}
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EXPORT_SYMBOL(rtl_evm_db_to_percentage);
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static long rtl_translate_todbm(struct ieee80211_hw *hw,
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u8 signal_strength_index)
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{
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long signal_power;
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signal_power = (long)((signal_strength_index + 1) >> 1);
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signal_power -= 95;
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return signal_power;
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}
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long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig)
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{
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long retsig;
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if (currsig >= 61 && currsig <= 100)
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retsig = 90 + ((currsig - 60) / 4);
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else if (currsig >= 41 && currsig <= 60)
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retsig = 78 + ((currsig - 40) / 2);
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else if (currsig >= 31 && currsig <= 40)
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retsig = 66 + (currsig - 30);
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else if (currsig >= 21 && currsig <= 30)
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retsig = 54 + (currsig - 20);
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else if (currsig >= 5 && currsig <= 20)
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retsig = 42 + (((currsig - 5) * 2) / 3);
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else if (currsig == 4)
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retsig = 36;
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else if (currsig == 3)
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retsig = 27;
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else if (currsig == 2)
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retsig = 18;
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else if (currsig == 1)
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retsig = 9;
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else
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retsig = currsig;
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return retsig;
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}
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EXPORT_SYMBOL(rtl_signal_scale_mapping);
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static void rtl_process_ui_rssi(struct ieee80211_hw *hw,
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struct rtl_stats *pstatus)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_phy *rtlphy = &(rtlpriv->phy);
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u8 rfpath;
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u32 last_rssi, tmpval;
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rtlpriv->stats.rssi_calculate_cnt++;
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if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
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rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX;
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last_rssi = rtlpriv->stats.ui_rssi.elements[
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rtlpriv->stats.ui_rssi.index];
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rtlpriv->stats.ui_rssi.total_val -= last_rssi;
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}
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rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength;
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rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] =
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pstatus->signalstrength;
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if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX)
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rtlpriv->stats.ui_rssi.index = 0;
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tmpval = rtlpriv->stats.ui_rssi.total_val /
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rtlpriv->stats.ui_rssi.total_num;
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rtlpriv->stats.signal_strength = rtl_translate_todbm(hw,
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(u8) tmpval);
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pstatus->rssi = rtlpriv->stats.signal_strength;
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if (pstatus->is_cck)
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return;
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for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath;
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rfpath++) {
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if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) {
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rtlpriv->stats.rx_rssi_percentage[rfpath] =
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pstatus->rx_mimo_signalstrength[rfpath];
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}
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if (pstatus->rx_mimo_signalstrength[rfpath] >
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rtlpriv->stats.rx_rssi_percentage[rfpath]) {
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rtlpriv->stats.rx_rssi_percentage[rfpath] =
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((rtlpriv->stats.rx_rssi_percentage[rfpath] *
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(RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_mimo_signalstrength[rfpath])) /
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(RX_SMOOTH_FACTOR);
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rtlpriv->stats.rx_rssi_percentage[rfpath] =
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rtlpriv->stats.rx_rssi_percentage[rfpath] + 1;
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} else {
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rtlpriv->stats.rx_rssi_percentage[rfpath] =
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((rtlpriv->stats.rx_rssi_percentage[rfpath] *
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(RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_mimo_signalstrength[rfpath])) /
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(RX_SMOOTH_FACTOR);
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}
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}
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}
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static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw,
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struct rtl_stats *pstatus)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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int weighting = 0;
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if (rtlpriv->stats.recv_signal_power == 0)
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rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower;
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if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power)
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weighting = 5;
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else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power)
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weighting = (-5);
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rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power *
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5 + pstatus->recvsignalpower + weighting) / 6;
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}
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static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_sta_info *drv_priv = NULL;
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struct ieee80211_sta *sta = NULL;
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long undec_sm_pwdb;
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long undec_sm_cck;
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rcu_read_lock();
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if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
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sta = rtl_find_sta(hw, pstatus->psaddr);
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/* adhoc or ap mode */
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if (sta) {
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drv_priv = (struct rtl_sta_info *) sta->drv_priv;
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undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb;
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undec_sm_cck = drv_priv->rssi_stat.undec_sm_cck;
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} else {
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undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
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undec_sm_cck = rtlpriv->dm.undec_sm_cck;
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}
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if (undec_sm_pwdb < 0)
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undec_sm_pwdb = pstatus->rx_pwdb_all;
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if (undec_sm_cck < 0)
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undec_sm_cck = pstatus->rx_pwdb_all;
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if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) {
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undec_sm_pwdb = (((undec_sm_pwdb) *
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(RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
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undec_sm_pwdb = undec_sm_pwdb + 1;
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} else {
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undec_sm_pwdb = (((undec_sm_pwdb) * (RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
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}
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if (pstatus->rx_pwdb_all > (u32) undec_sm_cck) {
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undec_sm_cck = (((undec_sm_pwdb) *
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(RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
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undec_sm_cck = undec_sm_cck + 1;
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} else {
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undec_sm_pwdb = (((undec_sm_cck) * (RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
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}
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if (sta) {
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drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb;
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} else {
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rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb;
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}
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rcu_read_unlock();
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rtl_update_rxsignalstatistics(hw, pstatus);
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}
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static void rtl_process_ui_link_quality(struct ieee80211_hw *hw,
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struct rtl_stats *pstatus)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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u32 last_evm, n_stream, tmpval;
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if (pstatus->signalquality == 0)
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return;
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if (rtlpriv->stats.ui_link_quality.total_num++ >=
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PHY_LINKQUALITY_SLID_WIN_MAX) {
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rtlpriv->stats.ui_link_quality.total_num =
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PHY_LINKQUALITY_SLID_WIN_MAX;
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last_evm = rtlpriv->stats.ui_link_quality.elements[
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rtlpriv->stats.ui_link_quality.index];
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rtlpriv->stats.ui_link_quality.total_val -= last_evm;
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}
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rtlpriv->stats.ui_link_quality.total_val += pstatus->signalquality;
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rtlpriv->stats.ui_link_quality.elements[
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rtlpriv->stats.ui_link_quality.index++] =
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pstatus->signalquality;
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if (rtlpriv->stats.ui_link_quality.index >=
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PHY_LINKQUALITY_SLID_WIN_MAX)
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rtlpriv->stats.ui_link_quality.index = 0;
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tmpval = rtlpriv->stats.ui_link_quality.total_val /
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rtlpriv->stats.ui_link_quality.total_num;
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rtlpriv->stats.signal_quality = tmpval;
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rtlpriv->stats.last_sigstrength_inpercent = tmpval;
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for (n_stream = 0; n_stream < 2; n_stream++) {
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if (pstatus->rx_mimo_sig_qual[n_stream] != -1) {
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if (rtlpriv->stats.rx_evm_percentage[n_stream] == 0) {
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rtlpriv->stats.rx_evm_percentage[n_stream] =
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pstatus->rx_mimo_sig_qual[n_stream];
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}
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rtlpriv->stats.rx_evm_percentage[n_stream] =
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((rtlpriv->stats.rx_evm_percentage[n_stream]
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* (RX_SMOOTH_FACTOR - 1)) +
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(pstatus->rx_mimo_sig_qual[n_stream] * 1)) /
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(RX_SMOOTH_FACTOR);
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}
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}
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}
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void rtl_process_phyinfo(struct ieee80211_hw *hw, u8 *buffer,
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struct rtl_stats *pstatus)
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{
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if (!pstatus->packet_matchbssid)
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return;
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rtl_process_ui_rssi(hw, pstatus);
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rtl_process_pwdb(hw, pstatus);
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rtl_process_ui_link_quality(hw, pstatus);
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}
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EXPORT_SYMBOL(rtl_process_phyinfo);
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