drivers/net/wireless/rtlwifi/rtl8192cu/dm.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2010  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
  30 #include "../wifi.h"
  31 #include "../base.h"
  32 #include "reg.h"
  33 #include "def.h"
  34 #include "phy.h"
  35 #include "dm.h"
  36
  37 void rtl92cu_dm_dynamic_txpower(struct ieee80211_hw *hw)
  38 {
  39         struct rtl_priv *rtlpriv = rtl_priv(hw);
  40         struct rtl_phy *rtlphy = &(rtlpriv->phy);
  41         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
  42         long undecorated_smoothed_pwdb;
  43
  44         if (!rtlpriv->dm.dynamic_txpower_enable)
  45                 return;
  46
  47         if (rtlpriv->dm.dm_flag & HAL_DM_HIPWR_DISABLE) {
  48                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_NORMAL;
  49                 return;
  50         }
  51
  52         if ((mac->link_state < MAC80211_LINKED) &&
  53             (rtlpriv->dm.entry_min_undecoratedsmoothed_pwdb == 0)) {
  54                 RT_TRACE(rtlpriv, COMP_POWER, DBG_TRACE,
  55                          ("Not connected to any\n"));
  56
  57                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_NORMAL;
  58
  59                 rtlpriv->dm.last_dtp_lvl = TXHIGHPWRLEVEL_NORMAL;
  60                 return;
  61         }
  62
  63         if (mac->link_state >= MAC80211_LINKED) {
  64                 if (mac->opmode == NL80211_IFTYPE_ADHOC) {
  65                         undecorated_smoothed_pwdb =
  66                             rtlpriv->dm.entry_min_undecoratedsmoothed_pwdb;
  67                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  68                                  ("AP Client PWDB = 0x%lx\n",
  69                                   undecorated_smoothed_pwdb));
  70                 } else {
  71                         undecorated_smoothed_pwdb =
  72                             rtlpriv->dm.undecorated_smoothed_pwdb;
  73                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  74                                  ("STA Default Port PWDB = 0x%lx\n",
  75                                   undecorated_smoothed_pwdb));
  76                 }
  77         } else {
  78                 undecorated_smoothed_pwdb =
  79                     rtlpriv->dm.entry_min_undecoratedsmoothed_pwdb;
  80
  81                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  82                          ("AP Ext Port PWDB = 0x%lx\n",
  83                           undecorated_smoothed_pwdb));
  84         }
  85
  86         if (undecorated_smoothed_pwdb >= TX_POWER_NEAR_FIELD_THRESH_LVL2) {
  87                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_LEVEL1;
  88                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  89                          ("TXHIGHPWRLEVEL_LEVEL1 (TxPwr=0x0)\n"));
  90         } else if ((undecorated_smoothed_pwdb <
  91                     (TX_POWER_NEAR_FIELD_THRESH_LVL2 - 3)) &&
  92                    (undecorated_smoothed_pwdb >=
  93                     TX_POWER_NEAR_FIELD_THRESH_LVL1)) {
  94
  95                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_LEVEL1;
  96                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  97                          ("TXHIGHPWRLEVEL_LEVEL1 (TxPwr=0x10)\n"));
  98         } else if (undecorated_smoothed_pwdb <
  99                    (TX_POWER_NEAR_FIELD_THRESH_LVL1 - 5)) {
 100                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_NORMAL;
 101                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 102                          ("TXHIGHPWRLEVEL_NORMAL\n"));
 103         }
 104
 105         if ((rtlpriv->dm.dynamic_txhighpower_lvl != rtlpriv->dm.last_dtp_lvl)) {
 106                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 107                          ("PHY_SetTxPowerLevel8192S() Channel = %d\n",
 108                           rtlphy->current_channel));
 109                 rtl92c_phy_set_txpower_level(hw, rtlphy->current_channel);
 110         }
 111
 112         rtlpriv->dm.last_dtp_lvl = rtlpriv->dm.dynamic_txhighpower_lvl;
 113 }