kernel/drivers/staging/rtl8192e/rtl8192e/rtl_ps.c

   1 /******************************************************************************
   2  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   3  *
   4  * Based on the r8180 driver, which is:
   5  * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of version 2 of the GNU General Public License as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  * Contact Information:
  23  * wlanfae <wlanfae@realtek.com>
  24  *****************************************************************************/
  25 #include "rtl_ps.h"
  26 #include "rtl_core.h"
  27 #include "r8192E_phy.h"
  28 #include "r8192E_phyreg.h"
  29 #include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */
  30 #include "r8192E_cmdpkt.h"
  31
  32 static void rtl8192_hw_sleep_down(struct net_device *dev)
  33 {
  34         struct r8192_priv *priv = rtllib_priv(dev);
  35         unsigned long flags = 0;
  36
  37         spin_lock_irqsave(&priv->rf_ps_lock, flags);
  38         if (priv->RFChangeInProgress) {
  39                 spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  40                 RT_TRACE(COMP_DBG,
  41                          "rtl8192_hw_sleep_down(): RF Change in progress!\n");
  42                 return;
  43         }
  44         spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  45         RT_TRACE(COMP_DBG, "%s()============>come to sleep down\n", __func__);
  46
  47         MgntActSet_RF_State(dev, eRfSleep, RF_CHANGE_BY_PS, false);
  48 }
  49
  50 void rtl8192_hw_sleep_wq(void *data)
  51 {
  52         struct rtllib_device *ieee = container_of_dwork_rsl(data,
  53                                      struct rtllib_device, hw_sleep_wq);
  54         struct net_device *dev = ieee->dev;
  55
  56         rtl8192_hw_sleep_down(dev);
  57 }
  58
  59 void rtl8192_hw_wakeup(struct net_device *dev)
  60 {
  61         struct r8192_priv *priv = rtllib_priv(dev);
  62         unsigned long flags = 0;
  63
  64         spin_lock_irqsave(&priv->rf_ps_lock, flags);
  65         if (priv->RFChangeInProgress) {
  66                 spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  67                 RT_TRACE(COMP_DBG,
  68                          "rtl8192_hw_wakeup(): RF Change in progress!\n");
  69                 queue_delayed_work_rsl(priv->rtllib->wq,
  70                                        &priv->rtllib->hw_wakeup_wq,
  71                                        msecs_to_jiffies(10));
  72                 return;
  73         }
  74         spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  75         RT_TRACE(COMP_PS, "%s()============>come to wake up\n", __func__);
  76         MgntActSet_RF_State(dev, eRfOn, RF_CHANGE_BY_PS, false);
  77 }
  78
  79 void rtl8192_hw_wakeup_wq(void *data)
  80 {
  81         struct rtllib_device *ieee = container_of_dwork_rsl(data,
  82                                      struct rtllib_device, hw_wakeup_wq);
  83         struct net_device *dev = ieee->dev;
  84
  85         rtl8192_hw_wakeup(dev);
  86 }
  87
  88 #define MIN_SLEEP_TIME 50
  89 #define MAX_SLEEP_TIME 10000
  90 void rtl8192_hw_to_sleep(struct net_device *dev, u64 time)
  91 {
  92         struct r8192_priv *priv = rtllib_priv(dev);
  93
  94         u32 tmp;
  95         unsigned long flags;
  96
  97         spin_lock_irqsave(&priv->ps_lock, flags);
  98
  99         time -= msecs_to_jiffies(8 + 16 + 7);
 100
 101         if ((time - jiffies) <= msecs_to_jiffies(MIN_SLEEP_TIME)) {
 102                 spin_unlock_irqrestore(&priv->ps_lock, flags);
 103                 netdev_info(dev, "too short to sleep::%lld < %ld\n",
 104                             time - jiffies, msecs_to_jiffies(MIN_SLEEP_TIME));
 105                 return;
 106         }
 107
 108         if ((time - jiffies) > msecs_to_jiffies(MAX_SLEEP_TIME)) {
 109                 netdev_info(dev, "========>too long to sleep:%lld > %ld\n",
 110                             time - jiffies, msecs_to_jiffies(MAX_SLEEP_TIME));
 111                 spin_unlock_irqrestore(&priv->ps_lock, flags);
 112                 return;
 113         }
 114         tmp = time - jiffies;
 115         queue_delayed_work_rsl(priv->rtllib->wq,
 116                         &priv->rtllib->hw_wakeup_wq, tmp);
 117         queue_delayed_work_rsl(priv->rtllib->wq,
 118                         (void *)&priv->rtllib->hw_sleep_wq, 0);
 119         spin_unlock_irqrestore(&priv->ps_lock, flags);
 120 }
 121
 122 static void InactivePsWorkItemCallback(struct net_device *dev)
 123 {
 124         struct r8192_priv *priv = rtllib_priv(dev);
 125         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 126                                         &(priv->rtllib->PowerSaveControl);
 127
 128         RT_TRACE(COMP_PS, "InactivePsWorkItemCallback() --------->\n");
 129         pPSC->bSwRfProcessing = true;
 130
 131         RT_TRACE(COMP_PS, "InactivePsWorkItemCallback(): Set RF to %s.\n",
 132                  pPSC->eInactivePowerState == eRfOff ? "OFF" : "ON");
 133         MgntActSet_RF_State(dev, pPSC->eInactivePowerState, RF_CHANGE_BY_IPS,
 134                             false);
 135
 136         pPSC->bSwRfProcessing = false;
 137         RT_TRACE(COMP_PS, "InactivePsWorkItemCallback() <---------\n");
 138 }
 139
 140 void IPSEnter(struct net_device *dev)
 141 {
 142         struct r8192_priv *priv = rtllib_priv(dev);
 143         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 144                                         &(priv->rtllib->PowerSaveControl);
 145         enum rt_rf_power_state rtState;
 146
 147         if (pPSC->bInactivePs) {
 148                 rtState = priv->rtllib->eRFPowerState;
 149                 if (rtState == eRfOn && !pPSC->bSwRfProcessing &&
 150                         (priv->rtllib->state != RTLLIB_LINKED) &&
 151                         (priv->rtllib->iw_mode != IW_MODE_MASTER)) {
 152                         RT_TRACE(COMP_PS, "IPSEnter(): Turn off RF.\n");
 153                         pPSC->eInactivePowerState = eRfOff;
 154                         priv->isRFOff = true;
 155                         priv->bInPowerSaveMode = true;
 156                         InactivePsWorkItemCallback(dev);
 157                 }
 158         }
 159 }
 160
 161 void IPSLeave(struct net_device *dev)
 162 {
 163         struct r8192_priv *priv = rtllib_priv(dev);
 164         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 165                                         &(priv->rtllib->PowerSaveControl);
 166         enum rt_rf_power_state rtState;
 167
 168         if (pPSC->bInactivePs) {
 169                 rtState = priv->rtllib->eRFPowerState;
 170                 if (rtState != eRfOn  && !pPSC->bSwRfProcessing &&
 171                     priv->rtllib->RfOffReason <= RF_CHANGE_BY_IPS) {
 172                         RT_TRACE(COMP_PS, "IPSLeave(): Turn on RF.\n");
 173                         pPSC->eInactivePowerState = eRfOn;
 174                         priv->bInPowerSaveMode = false;
 175                         InactivePsWorkItemCallback(dev);
 176                 }
 177         }
 178 }
 179
 180 void IPSLeave_wq(void *data)
 181 {
 182         struct rtllib_device *ieee = container_of_work_rsl(data,
 183                                      struct rtllib_device, ips_leave_wq);
 184         struct net_device *dev = ieee->dev;
 185         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 186
 187         down(&priv->rtllib->ips_sem);
 188         IPSLeave(dev);
 189         up(&priv->rtllib->ips_sem);
 190 }
 191
 192 void rtllib_ips_leave_wq(struct net_device *dev)
 193 {
 194         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 195         enum rt_rf_power_state rtState;
 196
 197         rtState = priv->rtllib->eRFPowerState;
 198
 199         if (priv->rtllib->PowerSaveControl.bInactivePs) {
 200                 if (rtState == eRfOff) {
 201                         if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
 202                                 RT_TRACE(COMP_ERR, "%s(): RF is OFF.\n",
 203                                          __func__);
 204                                 return;
 205                         }
 206                         netdev_info(dev, "=========>%s(): IPSLeave\n",
 207                                     __func__);
 208                         queue_work_rsl(priv->rtllib->wq,
 209                                        &priv->rtllib->ips_leave_wq);
 210                 }
 211         }
 212 }
 213
 214 void rtllib_ips_leave(struct net_device *dev)
 215 {
 216         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 217
 218         down(&priv->rtllib->ips_sem);
 219         IPSLeave(dev);
 220         up(&priv->rtllib->ips_sem);
 221 }
 222
 223 static bool MgntActSet_802_11_PowerSaveMode(struct net_device *dev,
 224                                             u8 rtPsMode)
 225 {
 226         struct r8192_priv *priv = rtllib_priv(dev);
 227
 228         if (priv->rtllib->iw_mode == IW_MODE_ADHOC)
 229                 return false;
 230
 231         RT_TRACE(COMP_LPS, "%s(): set ieee->ps = %x\n", __func__, rtPsMode);
 232         if (!priv->ps_force)
 233                 priv->rtllib->ps = rtPsMode;
 234         if (priv->rtllib->sta_sleep != LPS_IS_WAKE &&
 235             rtPsMode == RTLLIB_PS_DISABLED) {
 236                 unsigned long flags;
 237
 238                 rtl8192_hw_wakeup(dev);
 239                 priv->rtllib->sta_sleep = LPS_IS_WAKE;
 240
 241                 spin_lock_irqsave(&(priv->rtllib->mgmt_tx_lock), flags);
 242                 RT_TRACE(COMP_DBG,
 243                          "LPS leave: notify AP we are awaked ++++++++++ SendNullFunctionData\n");
 244                 rtllib_sta_ps_send_null_frame(priv->rtllib, 0);
 245                 spin_unlock_irqrestore(&(priv->rtllib->mgmt_tx_lock), flags);
 246         }
 247
 248         return true;
 249 }
 250
 251 void LeisurePSEnter(struct net_device *dev)
 252 {
 253         struct r8192_priv *priv = rtllib_priv(dev);
 254         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 255                                         &(priv->rtllib->PowerSaveControl);
 256
 257         RT_TRACE(COMP_PS, "LeisurePSEnter()...\n");
 258         RT_TRACE(COMP_PS,
 259                  "pPSC->bLeisurePs = %d, ieee->ps = %d,pPSC->LpsIdleCount is %d,RT_CHECK_FOR_HANG_PERIOD is %d\n",
 260                  pPSC->bLeisurePs, priv->rtllib->ps, pPSC->LpsIdleCount,
 261                  RT_CHECK_FOR_HANG_PERIOD);
 262
 263         if (!((priv->rtllib->iw_mode == IW_MODE_INFRA) &&
 264             (priv->rtllib->state == RTLLIB_LINKED))
 265             || (priv->rtllib->iw_mode == IW_MODE_ADHOC) ||
 266             (priv->rtllib->iw_mode == IW_MODE_MASTER))
 267                 return;
 268
 269         if (pPSC->bLeisurePs) {
 270                 if (pPSC->LpsIdleCount >= RT_CHECK_FOR_HANG_PERIOD) {
 271
 272                         if (priv->rtllib->ps == RTLLIB_PS_DISABLED) {
 273
 274                                 RT_TRACE(COMP_LPS,
 275                                          "LeisurePSEnter(): Enter 802.11 power save mode...\n");
 276
 277                                 if (!pPSC->bFwCtrlLPS) {
 278                                         if (priv->rtllib->SetFwCmdHandler)
 279                                                 priv->rtllib->SetFwCmdHandler(
 280                                                         dev, FW_CMD_LPS_ENTER);
 281                                 }
 282                                 MgntActSet_802_11_PowerSaveMode(dev,
 283                                                          RTLLIB_PS_MBCAST |
 284                                                          RTLLIB_PS_UNICAST);
 285                         }
 286                 } else
 287                         pPSC->LpsIdleCount++;
 288         }
 289 }
 290
 291 void LeisurePSLeave(struct net_device *dev)
 292 {
 293         struct r8192_priv *priv = rtllib_priv(dev);
 294         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 295                                         &(priv->rtllib->PowerSaveControl);
 296
 297
 298         RT_TRACE(COMP_PS, "LeisurePSLeave()...\n");
 299         RT_TRACE(COMP_PS, "pPSC->bLeisurePs = %d, ieee->ps = %d\n",
 300                 pPSC->bLeisurePs, priv->rtllib->ps);
 301
 302         if (pPSC->bLeisurePs) {
 303                 if (priv->rtllib->ps != RTLLIB_PS_DISABLED) {
 304                         RT_TRACE(COMP_LPS,
 305                                  "LeisurePSLeave(): Busy Traffic , Leave 802.11 power save..\n");
 306                         MgntActSet_802_11_PowerSaveMode(dev,
 307                                          RTLLIB_PS_DISABLED);
 308
 309                         if (!pPSC->bFwCtrlLPS) {
 310                                 if (priv->rtllib->SetFwCmdHandler)
 311                                         priv->rtllib->SetFwCmdHandler(dev,
 312                                                          FW_CMD_LPS_LEAVE);
 313                     }
 314                 }
 315         }
 316 }