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/******************************************************************************
*
* Copyright(c) 2009-2012 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <wlanfae@realtek.com>
* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
* Hsinchu 300, Taiwan.
*
* Larry Finger <Larry.Finger@lwfinger.net>
*
*****************************************************************************/
#include "wifi.h"
#include "stats.h"
#include <linux/export.h>
u8 rtl_query_rxpwrpercentage(char antpower)
{
if ((antpower <= -100) || (antpower >= 20))
return 0;
else if (antpower >= 0)
return 100;
else
return 100 + antpower;
}
EXPORT_SYMBOL(rtl_query_rxpwrpercentage);
u8 rtl_evm_db_to_percentage(char value)
{
char ret_val = clamp(-value, 0, 33) * 3;
if (ret_val == 99)
ret_val = 100;
return ret_val;
}
EXPORT_SYMBOL(rtl_evm_db_to_percentage);
static long rtl_translate_todbm(struct ieee80211_hw *hw,
u8 signal_strength_index)
{
long signal_power;
signal_power = (long)((signal_strength_index + 1) >> 1);
signal_power -= 95;
return signal_power;
}
long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig)
{
long retsig;
if (currsig >= 61 && currsig <= 100)
retsig = 90 + ((currsig - 60) / 4);
else if (currsig >= 41 && currsig <= 60)
retsig = 78 + ((currsig - 40) / 2);
else if (currsig >= 31 && currsig <= 40)
retsig = 66 + (currsig - 30);
else if (currsig >= 21 && currsig <= 30)
retsig = 54 + (currsig - 20);
else if (currsig >= 5 && currsig <= 20)
retsig = 42 + (((currsig - 5) * 2) / 3);
else if (currsig == 4)
retsig = 36;
else if (currsig == 3)
retsig = 27;
else if (currsig == 2)
retsig = 18;
else if (currsig == 1)
retsig = 9;
else
retsig = currsig;
return retsig;
}
EXPORT_SYMBOL(rtl_signal_scale_mapping);
static void rtl_process_ui_rssi(struct ieee80211_hw *hw,
struct rtl_stats *pstatus)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_phy *rtlphy = &(rtlpriv->phy);
u8 rfpath;
u32 last_rssi, tmpval;
if (!pstatus->packet_toself && !pstatus->packet_beacon)
return;
rtlpriv->stats.pwdb_all_cnt += pstatus->rx_pwdb_all;
rtlpriv->stats.rssi_calculate_cnt++;
if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX;
last_rssi = rtlpriv->stats.ui_rssi.elements[
rtlpriv->stats.ui_rssi.index];
rtlpriv->stats.ui_rssi.total_val -= last_rssi;
}
rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength;
rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] =
pstatus->signalstrength;
if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX)
rtlpriv->stats.ui_rssi.index = 0;
tmpval = rtlpriv->stats.ui_rssi.total_val /
rtlpriv->stats.ui_rssi.total_num;
rtlpriv->stats.signal_strength = rtl_translate_todbm(hw,
(u8) tmpval);
pstatus->rssi = rtlpriv->stats.signal_strength;
if (pstatus->is_cck)
return;
for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath;
rfpath++) {
if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) {
rtlpriv->stats.rx_rssi_percentage[rfpath] =
pstatus->rx_mimo_signalstrength[rfpath];
}
if (pstatus->rx_mimo_signalstrength[rfpath] >
rtlpriv->stats.rx_rssi_percentage[rfpath]) {
rtlpriv->stats.rx_rssi_percentage[rfpath] =
((rtlpriv->stats.rx_rssi_percentage[rfpath] *
(RX_SMOOTH_FACTOR - 1)) +
(pstatus->rx_mimo_signalstrength[rfpath])) /
(RX_SMOOTH_FACTOR);
rtlpriv->stats.rx_rssi_percentage[rfpath] =
rtlpriv->stats.rx_rssi_percentage[rfpath] + 1;
} else {
rtlpriv->stats.rx_rssi_percentage[rfpath] =
((rtlpriv->stats.rx_rssi_percentage[rfpath] *
(RX_SMOOTH_FACTOR - 1)) +
(pstatus->rx_mimo_signalstrength[rfpath])) /
(RX_SMOOTH_FACTOR);
}
rtlpriv->stats.rx_snr_db[rfpath] = pstatus->rx_snr[rfpath];
rtlpriv->stats.rx_evm_dbm[rfpath] =
pstatus->rx_mimo_evm_dbm[rfpath];
rtlpriv->stats.rx_cfo_short[rfpath] =
pstatus->cfo_short[rfpath];
rtlpriv->stats.rx_cfo_tail[rfpath] = pstatus->cfo_tail[rfpath];
}
}
static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw,
struct rtl_stats *pstatus)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
int weighting = 0;
if (rtlpriv->stats.recv_signal_power == 0)
rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower;
if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power)
weighting = 5;
else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power)
weighting = (-5);
rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power *
5 + pstatus->recvsignalpower + weighting) / 6;
}
static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_sta_info *drv_priv = NULL;
struct ieee80211_sta *sta = NULL;
long undec_sm_pwdb;
rcu_read_lock();
if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
sta = rtl_find_sta(hw, pstatus->psaddr);
/* adhoc or ap mode */
if (sta) {
drv_priv = (struct rtl_sta_info *) sta->drv_priv;
undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb;
} else {
undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
}
if (undec_sm_pwdb < 0)
undec_sm_pwdb = pstatus->rx_pwdb_all;
if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) {
undec_sm_pwdb = (((undec_sm_pwdb) *
(RX_SMOOTH_FACTOR - 1)) +
(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
undec_sm_pwdb = undec_sm_pwdb + 1;
} else {
undec_sm_pwdb = (((undec_sm_pwdb) *
(RX_SMOOTH_FACTOR - 1)) +
(pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
}
if (sta) {
drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb;
} else {
rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb;
}
rcu_read_unlock();
rtl_update_rxsignalstatistics(hw, pstatus);
}
static void rtl_process_ui_link_quality(struct ieee80211_hw *hw,
struct rtl_stats *pstatus)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 last_evm, n_stream, tmpval;
if (pstatus->signalquality == 0)
return;
if (rtlpriv->stats.ui_link_quality.total_num++ >=
PHY_LINKQUALITY_SLID_WIN_MAX) {
rtlpriv->stats.ui_link_quality.total_num =
PHY_LINKQUALITY_SLID_WIN_MAX;
last_evm = rtlpriv->stats.ui_link_quality.elements[
rtlpriv->stats.ui_link_quality.index];
rtlpriv->stats.ui_link_quality.total_val -= last_evm;
}
rtlpriv->stats.ui_link_quality.total_val += pstatus->signalquality;
rtlpriv->stats.ui_link_quality.elements[
rtlpriv->stats.ui_link_quality.index++] =
pstatus->signalquality;
if (rtlpriv->stats.ui_link_quality.index >=
PHY_LINKQUALITY_SLID_WIN_MAX)
rtlpriv->stats.ui_link_quality.index = 0;
tmpval = rtlpriv->stats.ui_link_quality.total_val /
rtlpriv->stats.ui_link_quality.total_num;
rtlpriv->stats.signal_quality = tmpval;
rtlpriv->stats.last_sigstrength_inpercent = tmpval;
for (n_stream = 0; n_stream < 2; n_stream++) {
if (pstatus->rx_mimo_sig_qual[n_stream] != -1) {
if (rtlpriv->stats.rx_evm_percentage[n_stream] == 0) {
rtlpriv->stats.rx_evm_percentage[n_stream] =
pstatus->rx_mimo_sig_qual[n_stream];
}
rtlpriv->stats.rx_evm_percentage[n_stream] =
((rtlpriv->stats.rx_evm_percentage[n_stream]
* (RX_SMOOTH_FACTOR - 1)) +
(pstatus->rx_mimo_sig_qual[n_stream] * 1)) /
(RX_SMOOTH_FACTOR);
}
}
}
void rtl_process_phyinfo(struct ieee80211_hw *hw, u8 *buffer,
struct rtl_stats *pstatus)
{
if (!pstatus->packet_matchbssid)
return;
rtl_process_ui_rssi(hw, pstatus);
rtl_process_pwdb(hw, pstatus);
rtl_process_ui_link_quality(hw, pstatus);
}
EXPORT_SYMBOL(rtl_process_phyinfo);
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