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

   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
  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 undec_sm_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_undec_sm_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                         undec_sm_pwdb = rtlpriv->dm.entry_min_undec_sm_pwdb;
  66                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  67                                  "AP Client PWDB = 0x%lx\n",
  68                                  undec_sm_pwdb);
  69                 } else {
  70                         undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
  71                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  72                                  "STA Default Port PWDB = 0x%lx\n",
  73                                  undec_sm_pwdb);
  74                 }
  75         } else {
  76                 undec_sm_pwdb = rtlpriv->dm.entry_min_undec_sm_pwdb;
  77
  78                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  79                          "AP Ext Port PWDB = 0x%lx\n",
  80                          undec_sm_pwdb);
  81         }
  82
  83         if (undec_sm_pwdb >= TX_POWER_NEAR_FIELD_THRESH_LVL2) {
  84                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_LEVEL1;
  85                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  86                          "TXHIGHPWRLEVEL_LEVEL1 (TxPwr=0x0)\n");
  87         } else if ((undec_sm_pwdb < (TX_POWER_NEAR_FIELD_THRESH_LVL2 - 3)) &&
  88                    (undec_sm_pwdb >= TX_POWER_NEAR_FIELD_THRESH_LVL1)) {
  89
  90                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_LEVEL1;
  91                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  92                          "TXHIGHPWRLEVEL_LEVEL1 (TxPwr=0x10)\n");
  93         } else if (undec_sm_pwdb < (TX_POWER_NEAR_FIELD_THRESH_LVL1 - 5)) {
  94                 rtlpriv->dm.dynamic_txhighpower_lvl = TXHIGHPWRLEVEL_NORMAL;
  95                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
  96                          "TXHIGHPWRLEVEL_NORMAL\n");
  97         }
  98
  99         if ((rtlpriv->dm.dynamic_txhighpower_lvl != rtlpriv->dm.last_dtp_lvl)) {
 100                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 101                          "PHY_SetTxPowerLevel8192S() Channel = %d\n",
 102                          rtlphy->current_channel);
 103                 rtl92c_phy_set_txpower_level(hw, rtlphy->current_channel);
 104                 if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 105                     TXHIGHPWRLEVEL_NORMAL)
 106                         dm_restorepowerindex(hw);
 107                 else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 108                          TXHIGHPWRLEVEL_LEVEL1)
 109                         dm_writepowerindex(hw, 0x14);
 110                 else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 111                          TXHIGHPWRLEVEL_LEVEL2)
 112                         dm_writepowerindex(hw, 0x10);
 113         }
 114
 115         rtlpriv->dm.last_dtp_lvl = rtlpriv->dm.dynamic_txhighpower_lvl;
 116 }