drivers/net/wireless/rtlwifi/ps.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 "ps.h"
  33
  34 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
  35 {
  36         struct rtl_priv *rtlpriv = rtl_priv(hw);
  37         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  38         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
  39
  40         /*<1> reset trx ring */
  41         if (rtlhal->interface == INTF_PCI)
  42                 rtlpriv->intf_ops->reset_trx_ring(hw);
  43
  44         if (is_hal_stop(rtlhal))
  45                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
  46                          ("Driver is already down!\n"));
  47
  48         /*<2> Enable Adapter */
  49         rtlpriv->cfg->ops->hw_init(hw);
  50         RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
  51
  52         /*<3> Enable Interrupt */
  53         rtlpriv->cfg->ops->enable_interrupt(hw);
  54
  55         /*<enable timer> */
  56         rtl_watch_dog_timer_callback((unsigned long)hw);
  57
  58         return true;
  59 }
  60 EXPORT_SYMBOL(rtl_ps_enable_nic);
  61
  62 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
  63 {
  64         struct rtl_priv *rtlpriv = rtl_priv(hw);
  65
  66         /*<1> Stop all timer */
  67         rtl_deinit_deferred_work(hw);
  68
  69         /*<2> Disable Interrupt */
  70         rtlpriv->cfg->ops->disable_interrupt(hw);
  71         tasklet_kill(&rtlpriv->works.irq_tasklet);
  72
  73         /*<3> Disable Adapter */
  74         rtlpriv->cfg->ops->hw_disable(hw);
  75
  76         return true;
  77 }
  78 EXPORT_SYMBOL(rtl_ps_disable_nic);
  79
  80 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
  81                          enum rf_pwrstate state_toset,
  82                          u32 changesource)
  83 {
  84         struct rtl_priv *rtlpriv = rtl_priv(hw);
  85         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  86         bool actionallowed = false;
  87
  88         switch (state_toset) {
  89         case ERFON:
  90                 ppsc->rfoff_reason &= (~changesource);
  91
  92                 if ((changesource == RF_CHANGE_BY_HW) &&
  93                     (ppsc->hwradiooff)) {
  94                         ppsc->hwradiooff = false;
  95                 }
  96
  97                 if (!ppsc->rfoff_reason) {
  98                         ppsc->rfoff_reason = 0;
  99                         actionallowed = true;
 100                 }
 101
 102                 break;
 103
 104         case ERFOFF:
 105
 106                 if ((changesource == RF_CHANGE_BY_HW)
 107                     && (ppsc->hwradiooff == false)) {
 108                         ppsc->hwradiooff = true;
 109                 }
 110
 111                 ppsc->rfoff_reason |= changesource;
 112                 actionallowed = true;
 113                 break;
 114
 115         case ERFSLEEP:
 116                 ppsc->rfoff_reason |= changesource;
 117                 actionallowed = true;
 118                 break;
 119
 120         default:
 121                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 122                          ("switch case not process\n"));
 123                 break;
 124         }
 125
 126         if (actionallowed)
 127                 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
 128
 129         return actionallowed;
 130 }
 131 EXPORT_SYMBOL(rtl_ps_set_rf_state);
 132
 133 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
 134 {
 135         struct rtl_priv *rtlpriv = rtl_priv(hw);
 136         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 137         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 138
 139         ppsc->swrf_processing = true;
 140
 141         if (ppsc->inactive_pwrstate == ERFON &&
 142             rtlhal->interface == INTF_PCI) {
 143                 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
 144                     RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 145                     rtlhal->interface == INTF_PCI) {
 146                         rtlpriv->intf_ops->disable_aspm(hw);
 147                         RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 148                 }
 149         }
 150
 151         rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
 152
 153         if (ppsc->inactive_pwrstate == ERFOFF &&
 154             rtlhal->interface == INTF_PCI) {
 155                 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 156                         !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 157                         rtlpriv->intf_ops->enable_aspm(hw);
 158                         RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 159                 }
 160         }
 161
 162         ppsc->swrf_processing = false;
 163 }
 164
 165 void rtl_ips_nic_off_wq_callback(void *data)
 166 {
 167         struct rtl_works *rtlworks =
 168             container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
 169         struct ieee80211_hw *hw = rtlworks->hw;
 170         struct rtl_priv *rtlpriv = rtl_priv(hw);
 171         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 172         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 173         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 174         enum rf_pwrstate rtstate;
 175
 176         if (mac->opmode != NL80211_IFTYPE_STATION) {
 177                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 178                          ("not station return\n"));
 179                 return;
 180         }
 181
 182         if (mac->link_state > MAC80211_NOLINK)
 183                 return;
 184
 185         if (is_hal_stop(rtlhal))
 186                 return;
 187
 188         if (rtlpriv->sec.being_setkey)
 189                 return;
 190
 191         if (ppsc->inactiveps) {
 192                 rtstate = ppsc->rfpwr_state;
 193
 194                 /*
 195                  *Do not enter IPS in the following conditions:
 196                  *(1) RF is already OFF or Sleep
 197                  *(2) swrf_processing (indicates the IPS is still under going)
 198                  *(3) Connectted (only disconnected can trigger IPS)
 199                  *(4) IBSS (send Beacon)
 200                  *(5) AP mode (send Beacon)
 201                  *(6) monitor mode (rcv packet)
 202                  */
 203
 204                 if (rtstate == ERFON &&
 205                     !ppsc->swrf_processing &&
 206                     (mac->link_state == MAC80211_NOLINK) &&
 207                     !mac->act_scanning) {
 208                         RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
 209                                  ("IPSEnter(): Turn off RF.\n"));
 210
 211                         ppsc->inactive_pwrstate = ERFOFF;
 212                         ppsc->in_powersavemode = true;
 213
 214                         /*rtl_pci_reset_trx_ring(hw); */
 215                         _rtl_ps_inactive_ps(hw);
 216                 }
 217         }
 218 }
 219
 220 void rtl_ips_nic_off(struct ieee80211_hw *hw)
 221 {
 222         struct rtl_priv *rtlpriv = rtl_priv(hw);
 223
 224         /*
 225          *because when link with ap, mac80211 will ask us
 226          *to disable nic quickly after scan before linking,
 227          *this will cause link failed, so we delay 100ms here
 228          */
 229         queue_delayed_work(rtlpriv->works.rtl_wq,
 230                            &rtlpriv->works.ips_nic_off_wq, MSECS(100));
 231 }
 232
 233 void rtl_ips_nic_on(struct ieee80211_hw *hw)
 234 {
 235         struct rtl_priv *rtlpriv = rtl_priv(hw);
 236         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 237         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 238         enum rf_pwrstate rtstate;
 239
 240         if (mac->opmode != NL80211_IFTYPE_STATION)
 241                 return;
 242
 243         spin_lock(&rtlpriv->locks.ips_lock);
 244
 245         if (ppsc->inactiveps) {
 246                 rtstate = ppsc->rfpwr_state;
 247
 248                 if (rtstate != ERFON &&
 249                     !ppsc->swrf_processing &&
 250                     ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
 251
 252                         ppsc->inactive_pwrstate = ERFON;
 253                         ppsc->in_powersavemode = false;
 254
 255                         _rtl_ps_inactive_ps(hw);
 256                 }
 257         }
 258
 259         spin_unlock(&rtlpriv->locks.ips_lock);
 260 }
 261
 262 /*for FW LPS*/
 263
 264 /*
 265  *Determine if we can set Fw into PS mode
 266  *in current condition.Return TRUE if it
 267  *can enter PS mode.
 268  */
 269 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
 270 {
 271         struct rtl_priv *rtlpriv = rtl_priv(hw);
 272         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 273         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 274         u32 ps_timediff;
 275
 276         ps_timediff = jiffies_to_msecs(jiffies -
 277                                        ppsc->last_delaylps_stamp_jiffies);
 278
 279         if (ps_timediff < 2000) {
 280                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 281                          ("Delay enter Fw LPS for DHCP, ARP,"
 282                           " or EAPOL exchanging state.\n"));
 283                 return false;
 284         }
 285
 286         if (mac->link_state != MAC80211_LINKED)
 287                 return false;
 288
 289         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 290                 return false;
 291
 292         return true;
 293 }
 294
 295 /* Change current and default preamble mode.*/
 296 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 297 {
 298         struct rtl_priv *rtlpriv = rtl_priv(hw);
 299         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 300         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 301         u8 rpwm_val, fw_pwrmode;
 302
 303         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 304                 return;
 305
 306         if (mac->link_state != MAC80211_LINKED)
 307                 return;
 308
 309         if (ppsc->dot11_psmode == rt_psmode)
 310                 return;
 311
 312         /* Update power save mode configured. */
 313         ppsc->dot11_psmode = rt_psmode;
 314
 315         /*
 316          *<FW control LPS>
 317          *1. Enter PS mode
 318          *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
 319          *   cmd to set Fw into PS mode.
 320          *2. Leave PS mode
 321          *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
 322          *   mode and set RPWM to turn RF on.
 323          */
 324
 325         if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
 326                 bool fw_current_inps;
 327                 if (ppsc->dot11_psmode == EACTIVE) {
 328                         RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 329                                  ("FW LPS leave ps_mode:%x\n",
 330                                   FW_PS_ACTIVE_MODE));
 331
 332                         rpwm_val = 0x0C;        /* RF on */
 333                         fw_pwrmode = FW_PS_ACTIVE_MODE;
 334                         rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
 335                                         (u8 *) (&rpwm_val));
 336                         rtlpriv->cfg->ops->set_hw_reg(hw,
 337                                         HW_VAR_H2C_FW_PWRMODE,
 338                                         (u8 *) (&fw_pwrmode));
 339                         fw_current_inps = false;
 340
 341                         rtlpriv->cfg->ops->set_hw_reg(hw,
 342                                         HW_VAR_FW_PSMODE_STATUS,
 343                                         (u8 *) (&fw_current_inps));
 344
 345                 } else {
 346                         if (rtl_get_fwlps_doze(hw)) {
 347                                 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 348                                                 ("FW LPS enter ps_mode:%x\n",
 349                                                  ppsc->fwctrl_psmode));
 350
 351                                 rpwm_val = 0x02;        /* RF off */
 352                                 fw_current_inps = true;
 353                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 354                                                 HW_VAR_FW_PSMODE_STATUS,
 355                                                 (u8 *) (&fw_current_inps));
 356                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 357                                                 HW_VAR_H2C_FW_PWRMODE,
 358                                                 (u8 *) (&ppsc->fwctrl_psmode));
 359
 360                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 361                                                 HW_VAR_SET_RPWM,
 362                                                 (u8 *) (&rpwm_val));
 363                         } else {
 364                                 /* Reset the power save related parameters. */
 365                                 ppsc->dot11_psmode = EACTIVE;
 366                         }
 367                 }
 368         }
 369 }
 370
 371 /*Enter the leisure power save mode.*/
 372 void rtl_lps_enter(struct ieee80211_hw *hw)
 373 {
 374         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 375         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 376         struct rtl_priv *rtlpriv = rtl_priv(hw);
 377
 378         if (!ppsc->fwctrl_lps)
 379                 return;
 380
 381         if (rtlpriv->sec.being_setkey)
 382                 return;
 383
 384         if (rtlpriv->link_info.busytraffic)
 385                 return;
 386
 387         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 388         if (mac->cnt_after_linked < 5)
 389                 return;
 390
 391         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 392                 return;
 393
 394         if (mac->link_state != MAC80211_LINKED)
 395                 return;
 396
 397         spin_lock_irq(&rtlpriv->locks.lps_lock);
 398
 399         /* Idle for a while if we connect to AP a while ago. */
 400         if (mac->cnt_after_linked >= 2) {
 401                 if (ppsc->dot11_psmode == EACTIVE) {
 402                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 403                                         ("Enter 802.11 power save mode...\n"));
 404
 405                         rtl_lps_set_psmode(hw, EAUTOPS);
 406                 }
 407         }
 408
 409         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 410 }
 411
 412 /*Leave the leisure power save mode.*/
 413 void rtl_lps_leave(struct ieee80211_hw *hw)
 414 {
 415         struct rtl_priv *rtlpriv = rtl_priv(hw);
 416         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 417         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 418         unsigned long flags;
 419
 420         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flags);
 421
 422         if (ppsc->fwctrl_lps) {
 423                 if (ppsc->dot11_psmode != EACTIVE) {
 424
 425                         /*FIX ME */
 426                         rtlpriv->cfg->ops->enable_interrupt(hw);
 427
 428                         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 429                             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 430                             rtlhal->interface == INTF_PCI) {
 431                                 rtlpriv->intf_ops->disable_aspm(hw);
 432                                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 433                         }
 434
 435                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 436                                  ("Busy Traffic,Leave 802.11 power save..\n"));
 437
 438                         rtl_lps_set_psmode(hw, EACTIVE);
 439                 }
 440         }
 441         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flags);
 442 }
 443
 444 /* For sw LPS*/
 445 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
 446 {
 447         struct rtl_priv *rtlpriv = rtl_priv(hw);
 448         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 449         struct ieee80211_hdr *hdr = (void *) data;
 450         struct ieee80211_tim_ie *tim_ie;
 451         u8 *tim;
 452         u8 tim_len;
 453         bool u_buffed;
 454         bool m_buffed;
 455
 456         if (mac->opmode != NL80211_IFTYPE_STATION)
 457                 return;
 458
 459         if (!rtlpriv->psc.swctrl_lps)
 460                 return;
 461
 462         if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
 463                 return;
 464
 465         if (!rtlpriv->psc.sw_ps_enabled)
 466                 return;
 467
 468         if (rtlpriv->psc.fwctrl_lps)
 469                 return;
 470
 471         if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
 472                 return;
 473
 474         /* check if this really is a beacon */
 475         if (!ieee80211_is_beacon(hdr->frame_control))
 476                 return;
 477
 478         /* min. beacon length + FCS_LEN */
 479         if (len <= 40 + FCS_LEN)
 480                 return;
 481
 482         /* and only beacons from the associated BSSID, please */
 483         if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
 484                 return;
 485
 486         rtlpriv->psc.last_beacon = jiffies;
 487
 488         tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
 489         if (!tim)
 490                 return;
 491
 492         if (tim[1] < sizeof(*tim_ie))
 493                 return;
 494
 495         tim_len = tim[1];
 496         tim_ie = (struct ieee80211_tim_ie *) &tim[2];
 497
 498         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 499                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 500
 501         /* Check whenever the PHY can be turned off again. */
 502
 503         /* 1. What about buffered unicast traffic for our AID? */
 504         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 505                                        rtlpriv->mac80211.assoc_id);
 506
 507         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 508         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 509         rtlpriv->psc.multi_buffered = m_buffed;
 510
 511         /* unicast will process by mac80211 through
 512          * set ~IEEE80211_CONF_PS, So we just check
 513          * multicast frames here */
 514         if (!m_buffed) {
 515                 /* back to low-power land. and delay is
 516                  * prevent null power save frame tx fail */
 517                 queue_delayed_work(rtlpriv->works.rtl_wq,
 518                                 &rtlpriv->works.ps_work, MSECS(5));
 519         } else {
 520                 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
 521                                 "m_buffered: %x\n", u_buffed, m_buffed));
 522         }
 523 }
 524
 525 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 526 {
 527         struct rtl_priv *rtlpriv = rtl_priv(hw);
 528         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 529         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 530
 531         if (!rtlpriv->psc.swctrl_lps)
 532                 return;
 533         if (mac->link_state != MAC80211_LINKED)
 534                 return;
 535
 536         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 537                 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 538                 rtlpriv->intf_ops->disable_aspm(hw);
 539                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 540         }
 541
 542         spin_lock_irq(&rtlpriv->locks.lps_lock);
 543         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
 544         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 545 }
 546
 547 void rtl_swlps_rfon_wq_callback(void *data)
 548 {
 549         struct rtl_works *rtlworks =
 550             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 551         struct ieee80211_hw *hw = rtlworks->hw;
 552
 553         rtl_swlps_rf_awake(hw);
 554 }
 555
 556 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 557 {
 558         struct rtl_priv *rtlpriv = rtl_priv(hw);
 559         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 560         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 561         u8 sleep_intv;
 562
 563         if (!rtlpriv->psc.sw_ps_enabled)
 564                 return;
 565
 566         if ((rtlpriv->sec.being_setkey) ||
 567             (mac->opmode == NL80211_IFTYPE_ADHOC))
 568                 return;
 569
 570         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 571         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 572                 return;
 573
 574         if (rtlpriv->link_info.busytraffic)
 575                 return;
 576
 577         spin_lock_irq(&rtlpriv->locks.lps_lock);
 578         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
 579         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 580
 581         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 582                 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 583                 rtlpriv->intf_ops->enable_aspm(hw);
 584                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 585         }
 586
 587         /* here is power save alg, when this beacon is DTIM
 588          * we will set sleep time to dtim_period * n;
 589          * when this beacon is not DTIM, we will set sleep
 590          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 591          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 592
 593         if (rtlpriv->psc.dtim_counter == 0) {
 594                 if (hw->conf.ps_dtim_period == 1)
 595                         sleep_intv = hw->conf.ps_dtim_period * 2;
 596                 else
 597                         sleep_intv = hw->conf.ps_dtim_period;
 598         } else {
 599                 sleep_intv = rtlpriv->psc.dtim_counter;
 600         }
 601
 602         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 603                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 604
 605         /* this print should always be dtim_conter = 0 &
 606          * sleep  = dtim_period, that meaons, we should
 607          * awake before every dtim */
 608         RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 609                  ("dtim_counter:%x will sleep :%d"
 610                  " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
 611
 612         /* we tested that 40ms is enough for sw & hw sw delay */
 613         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 614                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 615 }
 616
 617
 618 void rtl_swlps_wq_callback(void *data)
 619 {
 620         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 621                                      struct rtl_works,
 622                                      ps_work);
 623         struct ieee80211_hw *hw = rtlworks->hw;
 624         struct rtl_priv *rtlpriv = rtl_priv(hw);
 625         bool ps = false;
 626
 627         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 628
 629         /* we can sleep after ps null send ok */
 630         if (rtlpriv->psc.state_inap) {
 631                 rtl_swlps_rf_sleep(hw);
 632
 633                 if (rtlpriv->psc.state && !ps) {
 634                         rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
 635                                         rtlpriv->psc.last_action);
 636                 }
 637
 638                 if (ps)
 639                         rtlpriv->psc.last_slept = jiffies;
 640
 641                 rtlpriv->psc.last_action = jiffies;
 642                 rtlpriv->psc.state = ps;
 643         }
 644 }