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  * The full GNU General Public License is included in this distribution in the
  16  * file called LICENSE.
  17  *
  18  * Contact Information:
  19  * wlanfae <wlanfae@realtek.com>
  20  *****************************************************************************/
  21 #include "rtl_ps.h"
  22 #include "rtl_core.h"
  23 #include "r8192E_phy.h"
  24 #include "r8192E_phyreg.h"
  25 #include "r8190P_rtl8256.h" /* RTL8225 Radio frontend */
  26 #include "r8192E_cmdpkt.h"
  27 #include <linux/jiffies.h>
  28
  29 static void _rtl92e_hw_sleep(struct net_device *dev)
  30 {
  31         struct r8192_priv *priv = rtllib_priv(dev);
  32         unsigned long flags = 0;
  33
  34         spin_lock_irqsave(&priv->rf_ps_lock, flags);
  35         if (priv->RFChangeInProgress) {
  36                 spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  37                 RT_TRACE(COMP_DBG,
  38                          "_rtl92e_hw_sleep(): RF Change in progress!\n");
  39                 return;
  40         }
  41         spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  42         RT_TRACE(COMP_DBG, "%s()============>come to sleep down\n", __func__);
  43
  44         rtl92e_set_rf_state(dev, eRfSleep, RF_CHANGE_BY_PS);
  45 }
  46
  47 void rtl92e_hw_sleep_wq(void *data)
  48 {
  49         struct rtllib_device *ieee = container_of_dwork_rsl(data,
  50                                      struct rtllib_device, hw_sleep_wq);
  51         struct net_device *dev = ieee->dev;
  52
  53         _rtl92e_hw_sleep(dev);
  54 }
  55
  56 void rtl92e_hw_wakeup(struct net_device *dev)
  57 {
  58         struct r8192_priv *priv = rtllib_priv(dev);
  59         unsigned long flags = 0;
  60
  61         spin_lock_irqsave(&priv->rf_ps_lock, flags);
  62         if (priv->RFChangeInProgress) {
  63                 spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  64                 RT_TRACE(COMP_DBG,
  65                          "rtl92e_hw_wakeup(): RF Change in progress!\n");
  66                 schedule_delayed_work(&priv->rtllib->hw_wakeup_wq,
  67                                       msecs_to_jiffies(10));
  68                 return;
  69         }
  70         spin_unlock_irqrestore(&priv->rf_ps_lock, flags);
  71         RT_TRACE(COMP_PS, "%s()============>come to wake up\n", __func__);
  72         rtl92e_set_rf_state(dev, eRfOn, RF_CHANGE_BY_PS);
  73 }
  74
  75 void rtl92e_hw_wakeup_wq(void *data)
  76 {
  77         struct rtllib_device *ieee = container_of_dwork_rsl(data,
  78                                      struct rtllib_device, hw_wakeup_wq);
  79         struct net_device *dev = ieee->dev;
  80
  81         rtl92e_hw_wakeup(dev);
  82 }
  83
  84 #define MIN_SLEEP_TIME 50
  85 #define MAX_SLEEP_TIME 10000
  86 void rtl92e_enter_sleep(struct net_device *dev, u64 time)
  87 {
  88         struct r8192_priv *priv = rtllib_priv(dev);
  89
  90         u32 tmp;
  91         unsigned long flags;
  92         unsigned long timeout;
  93
  94         spin_lock_irqsave(&priv->ps_lock, flags);
  95
  96         time -= msecs_to_jiffies(8 + 16 + 7);
  97
  98         timeout = jiffies + msecs_to_jiffies(MIN_SLEEP_TIME);
  99         if (time_before((unsigned long)time, timeout)) {
 100                 spin_unlock_irqrestore(&priv->ps_lock, flags);
 101                 netdev_info(dev, "too short to sleep::%lld < %ld\n",
 102                             time - jiffies, msecs_to_jiffies(MIN_SLEEP_TIME));
 103                 return;
 104         }
 105         timeout = jiffies + msecs_to_jiffies(MAX_SLEEP_TIME);
 106         if (time_after((unsigned long)time, timeout)) {
 107                 netdev_info(dev, "========>too long to sleep:%lld > %ld\n",
 108                             time - jiffies, msecs_to_jiffies(MAX_SLEEP_TIME));
 109                 spin_unlock_irqrestore(&priv->ps_lock, flags);
 110                 return;
 111         }
 112         tmp = time - jiffies;
 113         schedule_delayed_work(&priv->rtllib->hw_wakeup_wq, tmp);
 114         schedule_delayed_work(&priv->rtllib->hw_sleep_wq, 0);
 115         spin_unlock_irqrestore(&priv->ps_lock, flags);
 116 }
 117
 118 static void _rtl92e_ps_update_rf_state(struct net_device *dev)
 119 {
 120         struct r8192_priv *priv = rtllib_priv(dev);
 121         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 122                                         &(priv->rtllib->PowerSaveControl);
 123
 124         RT_TRACE(COMP_PS, "_rtl92e_ps_update_rf_state() --------->\n");
 125         pPSC->bSwRfProcessing = true;
 126
 127         RT_TRACE(COMP_PS, "_rtl92e_ps_update_rf_state(): Set RF to %s.\n",
 128                  pPSC->eInactivePowerState == eRfOff ? "OFF" : "ON");
 129         rtl92e_set_rf_state(dev, pPSC->eInactivePowerState, RF_CHANGE_BY_IPS);
 130
 131         pPSC->bSwRfProcessing = false;
 132         RT_TRACE(COMP_PS, "_rtl92e_ps_update_rf_state() <---------\n");
 133 }
 134
 135 void rtl92e_ips_enter(struct net_device *dev)
 136 {
 137         struct r8192_priv *priv = rtllib_priv(dev);
 138         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 139                                         &(priv->rtllib->PowerSaveControl);
 140         enum rt_rf_power_state rtState;
 141
 142         if (pPSC->bInactivePs) {
 143                 rtState = priv->rtllib->eRFPowerState;
 144                 if (rtState == eRfOn && !pPSC->bSwRfProcessing &&
 145                         (priv->rtllib->state != RTLLIB_LINKED) &&
 146                         (priv->rtllib->iw_mode != IW_MODE_MASTER)) {
 147                         RT_TRACE(COMP_PS, "rtl92e_ips_enter(): Turn off RF.\n");
 148                         pPSC->eInactivePowerState = eRfOff;
 149                         priv->isRFOff = true;
 150                         priv->bInPowerSaveMode = true;
 151                         _rtl92e_ps_update_rf_state(dev);
 152                 }
 153         }
 154 }
 155
 156 void rtl92e_ips_leave(struct net_device *dev)
 157 {
 158         struct r8192_priv *priv = rtllib_priv(dev);
 159         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 160                                         &(priv->rtllib->PowerSaveControl);
 161         enum rt_rf_power_state rtState;
 162
 163         if (pPSC->bInactivePs) {
 164                 rtState = priv->rtllib->eRFPowerState;
 165                 if (rtState != eRfOn  && !pPSC->bSwRfProcessing &&
 166                     priv->rtllib->RfOffReason <= RF_CHANGE_BY_IPS) {
 167                         RT_TRACE(COMP_PS, "rtl92e_ips_leave(): Turn on RF.\n");
 168                         pPSC->eInactivePowerState = eRfOn;
 169                         priv->bInPowerSaveMode = false;
 170                         _rtl92e_ps_update_rf_state(dev);
 171                 }
 172         }
 173 }
 174
 175 void rtl92e_ips_leave_wq(void *data)
 176 {
 177         struct rtllib_device *ieee = container_of_work_rsl(data,
 178                                      struct rtllib_device, ips_leave_wq);
 179         struct net_device *dev = ieee->dev;
 180         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 181
 182         down(&priv->rtllib->ips_sem);
 183         rtl92e_ips_leave(dev);
 184         up(&priv->rtllib->ips_sem);
 185 }
 186
 187 void rtl92e_rtllib_ips_leave_wq(struct net_device *dev)
 188 {
 189         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 190         enum rt_rf_power_state rtState;
 191
 192         rtState = priv->rtllib->eRFPowerState;
 193
 194         if (priv->rtllib->PowerSaveControl.bInactivePs) {
 195                 if (rtState == eRfOff) {
 196                         if (priv->rtllib->RfOffReason > RF_CHANGE_BY_IPS) {
 197                                 netdev_warn(dev, "%s(): RF is OFF.\n",
 198                                             __func__);
 199                                 return;
 200                         }
 201                         netdev_info(dev, "=========>%s(): rtl92e_ips_leave\n",
 202                                     __func__);
 203                         schedule_work(&priv->rtllib->ips_leave_wq);
 204                 }
 205         }
 206 }
 207
 208 void rtl92e_rtllib_ips_leave(struct net_device *dev)
 209 {
 210         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
 211
 212         down(&priv->rtllib->ips_sem);
 213         rtl92e_ips_leave(dev);
 214         up(&priv->rtllib->ips_sem);
 215 }
 216
 217 static bool _rtl92e_ps_set_mode(struct net_device *dev, u8 rtPsMode)
 218 {
 219         struct r8192_priv *priv = rtllib_priv(dev);
 220
 221         if (priv->rtllib->iw_mode == IW_MODE_ADHOC)
 222                 return false;
 223
 224         RT_TRACE(COMP_LPS, "%s(): set ieee->ps = %x\n", __func__, rtPsMode);
 225         if (!priv->ps_force)
 226                 priv->rtllib->ps = rtPsMode;
 227         if (priv->rtllib->sta_sleep != LPS_IS_WAKE &&
 228             rtPsMode == RTLLIB_PS_DISABLED) {
 229                 unsigned long flags;
 230
 231                 rtl92e_hw_wakeup(dev);
 232                 priv->rtllib->sta_sleep = LPS_IS_WAKE;
 233
 234                 spin_lock_irqsave(&(priv->rtllib->mgmt_tx_lock), flags);
 235                 RT_TRACE(COMP_DBG,
 236                          "LPS leave: notify AP we are awaked ++++++++++ SendNullFunctionData\n");
 237                 rtllib_sta_ps_send_null_frame(priv->rtllib, 0);
 238                 spin_unlock_irqrestore(&(priv->rtllib->mgmt_tx_lock), flags);
 239         }
 240
 241         return true;
 242 }
 243
 244 void rtl92e_leisure_ps_enter(struct net_device *dev)
 245 {
 246         struct r8192_priv *priv = rtllib_priv(dev);
 247         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 248                                         &(priv->rtllib->PowerSaveControl);
 249
 250         RT_TRACE(COMP_PS, "rtl92e_leisure_ps_enter()...\n");
 251         RT_TRACE(COMP_PS,
 252                  "pPSC->bLeisurePs = %d, ieee->ps = %d,pPSC->LpsIdleCount is %d,RT_CHECK_FOR_HANG_PERIOD is %d\n",
 253                  pPSC->bLeisurePs, priv->rtllib->ps, pPSC->LpsIdleCount,
 254                  RT_CHECK_FOR_HANG_PERIOD);
 255
 256         if (!((priv->rtllib->iw_mode == IW_MODE_INFRA) &&
 257             (priv->rtllib->state == RTLLIB_LINKED))
 258             || (priv->rtllib->iw_mode == IW_MODE_ADHOC) ||
 259             (priv->rtllib->iw_mode == IW_MODE_MASTER))
 260                 return;
 261
 262         if (pPSC->bLeisurePs) {
 263                 if (pPSC->LpsIdleCount >= RT_CHECK_FOR_HANG_PERIOD) {
 264
 265                         if (priv->rtllib->ps == RTLLIB_PS_DISABLED) {
 266
 267                                 RT_TRACE(COMP_LPS,
 268                                          "rtl92e_leisure_ps_enter(): Enter 802.11 power save mode...\n");
 269
 270                                 if (!pPSC->bFwCtrlLPS) {
 271                                         if (priv->rtllib->SetFwCmdHandler)
 272                                                 priv->rtllib->SetFwCmdHandler(
 273                                                         dev, FW_CMD_LPS_ENTER);
 274                                 }
 275                                 _rtl92e_ps_set_mode(dev, RTLLIB_PS_MBCAST |
 276                                                          RTLLIB_PS_UNICAST);
 277                         }
 278                 } else
 279                         pPSC->LpsIdleCount++;
 280         }
 281 }
 282
 283 void rtl92e_leisure_ps_leave(struct net_device *dev)
 284 {
 285         struct r8192_priv *priv = rtllib_priv(dev);
 286         struct rt_pwr_save_ctrl *pPSC = (struct rt_pwr_save_ctrl *)
 287                                         &(priv->rtllib->PowerSaveControl);
 288
 289
 290         RT_TRACE(COMP_PS, "rtl92e_leisure_ps_leave()...\n");
 291         RT_TRACE(COMP_PS, "pPSC->bLeisurePs = %d, ieee->ps = %d\n",
 292                 pPSC->bLeisurePs, priv->rtllib->ps);
 293
 294         if (pPSC->bLeisurePs) {
 295                 if (priv->rtllib->ps != RTLLIB_PS_DISABLED) {
 296                         RT_TRACE(COMP_LPS,
 297                                  "rtl92e_leisure_ps_leave(): Busy Traffic , Leave 802.11 power save..\n");
 298                         _rtl92e_ps_set_mode(dev, RTLLIB_PS_DISABLED);
 299
 300                         if (!pPSC->bFwCtrlLPS) {
 301                                 if (priv->rtllib->SetFwCmdHandler)
 302                                         priv->rtllib->SetFwCmdHandler(dev,
 303                                                          FW_CMD_LPS_LEAVE);
 304                     }
 305                 }
 306         }
 307 }