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 <linux/export.h>
  31 #include "wifi.h"
  32 #include "base.h"
  33 #include "ps.h"
  34
  35 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
  36 {
  37         struct rtl_priv *rtlpriv = rtl_priv(hw);
  38         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  39         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
  40
  41         /*<1> reset trx ring */
  42         if (rtlhal->interface == INTF_PCI)
  43                 rtlpriv->intf_ops->reset_trx_ring(hw);
  44
  45         if (is_hal_stop(rtlhal))
  46                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
  47                          ("Driver is already down!\n"));
  48
  49         /*<2> Enable Adapter */
  50         rtlpriv->cfg->ops->hw_init(hw);
  51         RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
  52
  53         /*<3> Enable Interrupt */
  54         rtlpriv->cfg->ops->enable_interrupt(hw);
  55
  56         /*<enable timer> */
  57         rtl_watch_dog_timer_callback((unsigned long)hw);
  58
  59         return true;
  60 }
  61 EXPORT_SYMBOL(rtl_ps_enable_nic);
  62
  63 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
  64 {
  65         struct rtl_priv *rtlpriv = rtl_priv(hw);
  66
  67         /*<1> Stop all timer */
  68         rtl_deinit_deferred_work(hw);
  69
  70         /*<2> Disable Interrupt */
  71         rtlpriv->cfg->ops->disable_interrupt(hw);
  72         tasklet_kill(&rtlpriv->works.irq_tasklet);
  73
  74         /*<3> Disable Adapter */
  75         rtlpriv->cfg->ops->hw_disable(hw);
  76
  77         return true;
  78 }
  79 EXPORT_SYMBOL(rtl_ps_disable_nic);
  80
  81 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
  82                          enum rf_pwrstate state_toset,
  83                          u32 changesource)
  84 {
  85         struct rtl_priv *rtlpriv = rtl_priv(hw);
  86         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  87         bool actionallowed = false;
  88
  89         switch (state_toset) {
  90         case ERFON:
  91                 ppsc->rfoff_reason &= (~changesource);
  92
  93                 if ((changesource == RF_CHANGE_BY_HW) &&
  94                     (ppsc->hwradiooff)) {
  95                         ppsc->hwradiooff = false;
  96                 }
  97
  98                 if (!ppsc->rfoff_reason) {
  99                         ppsc->rfoff_reason = 0;
 100                         actionallowed = true;
 101                 }
 102
 103                 break;
 104
 105         case ERFOFF:
 106
 107                 if ((changesource == RF_CHANGE_BY_HW)
 108                     && (ppsc->hwradiooff == false)) {
 109                         ppsc->hwradiooff = true;
 110                 }
 111
 112                 ppsc->rfoff_reason |= changesource;
 113                 actionallowed = true;
 114                 break;
 115
 116         case ERFSLEEP:
 117                 ppsc->rfoff_reason |= changesource;
 118                 actionallowed = true;
 119                 break;
 120
 121         default:
 122                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 123                          ("switch case not process\n"));
 124                 break;
 125         }
 126
 127         if (actionallowed)
 128                 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
 129
 130         return actionallowed;
 131 }
 132 EXPORT_SYMBOL(rtl_ps_set_rf_state);
 133
 134 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
 135 {
 136         struct rtl_priv *rtlpriv = rtl_priv(hw);
 137         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 138         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 139
 140         ppsc->swrf_processing = true;
 141
 142         if (ppsc->inactive_pwrstate == ERFON &&
 143             rtlhal->interface == INTF_PCI) {
 144                 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
 145                     RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 146                     rtlhal->interface == INTF_PCI) {
 147                         rtlpriv->intf_ops->disable_aspm(hw);
 148                         RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 149                 }
 150         }
 151
 152         rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
 153
 154         if (ppsc->inactive_pwrstate == ERFOFF &&
 155             rtlhal->interface == INTF_PCI) {
 156                 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 157                         !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 158                         rtlpriv->intf_ops->enable_aspm(hw);
 159                         RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 160                 }
 161         }
 162
 163         ppsc->swrf_processing = false;
 164 }
 165
 166 void rtl_ips_nic_off_wq_callback(void *data)
 167 {
 168         struct rtl_works *rtlworks =
 169             container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
 170         struct ieee80211_hw *hw = rtlworks->hw;
 171         struct rtl_priv *rtlpriv = rtl_priv(hw);
 172         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 173         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 174         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 175         enum rf_pwrstate rtstate;
 176
 177         if (mac->opmode != NL80211_IFTYPE_STATION) {
 178                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 179                          ("not station return\n"));
 180                 return;
 181         }
 182
 183         if (mac->link_state > MAC80211_NOLINK)
 184                 return;
 185
 186         if (is_hal_stop(rtlhal))
 187                 return;
 188
 189         if (rtlpriv->sec.being_setkey)
 190                 return;
 191
 192         if (ppsc->inactiveps) {
 193                 rtstate = ppsc->rfpwr_state;
 194
 195                 /*
 196                  *Do not enter IPS in the following conditions:
 197                  *(1) RF is already OFF or Sleep
 198                  *(2) swrf_processing (indicates the IPS is still under going)
 199                  *(3) Connectted (only disconnected can trigger IPS)
 200                  *(4) IBSS (send Beacon)
 201                  *(5) AP mode (send Beacon)
 202                  *(6) monitor mode (rcv packet)
 203                  */
 204
 205                 if (rtstate == ERFON &&
 206                     !ppsc->swrf_processing &&
 207                     (mac->link_state == MAC80211_NOLINK) &&
 208                     !mac->act_scanning) {
 209                         RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
 210                                  ("IPSEnter(): Turn off RF.\n"));
 211
 212                         ppsc->inactive_pwrstate = ERFOFF;
 213                         ppsc->in_powersavemode = true;
 214
 215                         /*rtl_pci_reset_trx_ring(hw); */
 216                         _rtl_ps_inactive_ps(hw);
 217                 }
 218         }
 219 }
 220
 221 void rtl_ips_nic_off(struct ieee80211_hw *hw)
 222 {
 223         struct rtl_priv *rtlpriv = rtl_priv(hw);
 224
 225         /*
 226          *because when link with ap, mac80211 will ask us
 227          *to disable nic quickly after scan before linking,
 228          *this will cause link failed, so we delay 100ms here
 229          */
 230         queue_delayed_work(rtlpriv->works.rtl_wq,
 231                            &rtlpriv->works.ips_nic_off_wq, MSECS(100));
 232 }
 233
 234 void rtl_ips_nic_on(struct ieee80211_hw *hw)
 235 {
 236         struct rtl_priv *rtlpriv = rtl_priv(hw);
 237         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 238         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 239         enum rf_pwrstate rtstate;
 240
 241         if (mac->opmode != NL80211_IFTYPE_STATION)
 242                 return;
 243
 244         spin_lock(&rtlpriv->locks.ips_lock);
 245
 246         if (ppsc->inactiveps) {
 247                 rtstate = ppsc->rfpwr_state;
 248
 249                 if (rtstate != ERFON &&
 250                     !ppsc->swrf_processing &&
 251                     ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
 252
 253                         ppsc->inactive_pwrstate = ERFON;
 254                         ppsc->in_powersavemode = false;
 255
 256                         _rtl_ps_inactive_ps(hw);
 257                 }
 258         }
 259
 260         spin_unlock(&rtlpriv->locks.ips_lock);
 261 }
 262
 263 /*for FW LPS*/
 264
 265 /*
 266  *Determine if we can set Fw into PS mode
 267  *in current condition.Return TRUE if it
 268  *can enter PS mode.
 269  */
 270 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
 271 {
 272         struct rtl_priv *rtlpriv = rtl_priv(hw);
 273         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 274         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 275         u32 ps_timediff;
 276
 277         ps_timediff = jiffies_to_msecs(jiffies -
 278                                        ppsc->last_delaylps_stamp_jiffies);
 279
 280         if (ps_timediff < 2000) {
 281                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 282                          ("Delay enter Fw LPS for DHCP, ARP,"
 283                           " or EAPOL exchanging state.\n"));
 284                 return false;
 285         }
 286
 287         if (mac->link_state != MAC80211_LINKED)
 288                 return false;
 289
 290         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 291                 return false;
 292
 293         return true;
 294 }
 295
 296 /* Change current and default preamble mode.*/
 297 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 298 {
 299         struct rtl_priv *rtlpriv = rtl_priv(hw);
 300         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 301         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 302         u8 rpwm_val, fw_pwrmode;
 303
 304         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 305                 return;
 306
 307         if (mac->link_state != MAC80211_LINKED)
 308                 return;
 309
 310         if (ppsc->dot11_psmode == rt_psmode)
 311                 return;
 312
 313         /* Update power save mode configured. */
 314         ppsc->dot11_psmode = rt_psmode;
 315
 316         /*
 317          *<FW control LPS>
 318          *1. Enter PS mode
 319          *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
 320          *   cmd to set Fw into PS mode.
 321          *2. Leave PS mode
 322          *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
 323          *   mode and set RPWM to turn RF on.
 324          */
 325
 326         if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
 327                 bool fw_current_inps;
 328                 if (ppsc->dot11_psmode == EACTIVE) {
 329                         RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 330                                  ("FW LPS leave ps_mode:%x\n",
 331                                   FW_PS_ACTIVE_MODE));
 332
 333                         rpwm_val = 0x0C;        /* RF on */
 334                         fw_pwrmode = FW_PS_ACTIVE_MODE;
 335                         rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
 336                                         (u8 *) (&rpwm_val));
 337                         rtlpriv->cfg->ops->set_hw_reg(hw,
 338                                         HW_VAR_H2C_FW_PWRMODE,
 339                                         (u8 *) (&fw_pwrmode));
 340                         fw_current_inps = false;
 341
 342                         rtlpriv->cfg->ops->set_hw_reg(hw,
 343                                         HW_VAR_FW_PSMODE_STATUS,
 344                                         (u8 *) (&fw_current_inps));
 345
 346                 } else {
 347                         if (rtl_get_fwlps_doze(hw)) {
 348                                 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 349                                                 ("FW LPS enter ps_mode:%x\n",
 350                                                  ppsc->fwctrl_psmode));
 351
 352                                 rpwm_val = 0x02;        /* RF off */
 353                                 fw_current_inps = true;
 354                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 355                                                 HW_VAR_FW_PSMODE_STATUS,
 356                                                 (u8 *) (&fw_current_inps));
 357                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 358                                                 HW_VAR_H2C_FW_PWRMODE,
 359                                                 (u8 *) (&ppsc->fwctrl_psmode));
 360
 361                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 362                                                 HW_VAR_SET_RPWM,
 363                                                 (u8 *) (&rpwm_val));
 364                         } else {
 365                                 /* Reset the power save related parameters. */
 366                                 ppsc->dot11_psmode = EACTIVE;
 367                         }
 368                 }
 369         }
 370 }
 371
 372 /*Enter the leisure power save mode.*/
 373 void rtl_lps_enter(struct ieee80211_hw *hw)
 374 {
 375         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 376         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 377         struct rtl_priv *rtlpriv = rtl_priv(hw);
 378
 379         if (!ppsc->fwctrl_lps)
 380                 return;
 381
 382         if (rtlpriv->sec.being_setkey)
 383                 return;
 384
 385         if (rtlpriv->link_info.busytraffic)
 386                 return;
 387
 388         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 389         if (mac->cnt_after_linked < 5)
 390                 return;
 391
 392         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 393                 return;
 394
 395         if (mac->link_state != MAC80211_LINKED)
 396                 return;
 397
 398         spin_lock_irq(&rtlpriv->locks.lps_lock);
 399
 400         /* Idle for a while if we connect to AP a while ago. */
 401         if (mac->cnt_after_linked >= 2) {
 402                 if (ppsc->dot11_psmode == EACTIVE) {
 403                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 404                                         ("Enter 802.11 power save mode...\n"));
 405
 406                         rtl_lps_set_psmode(hw, EAUTOPS);
 407                 }
 408         }
 409
 410         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 411 }
 412
 413 /*Leave the leisure power save mode.*/
 414 void rtl_lps_leave(struct ieee80211_hw *hw)
 415 {
 416         struct rtl_priv *rtlpriv = rtl_priv(hw);
 417         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 418         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 419         unsigned long flags;
 420
 421         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flags);
 422
 423         if (ppsc->fwctrl_lps) {
 424                 if (ppsc->dot11_psmode != EACTIVE) {
 425
 426                         /*FIX ME */
 427                         rtlpriv->cfg->ops->enable_interrupt(hw);
 428
 429                         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 430                             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 431                             rtlhal->interface == INTF_PCI) {
 432                                 rtlpriv->intf_ops->disable_aspm(hw);
 433                                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 434                         }
 435
 436                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 437                                  ("Busy Traffic,Leave 802.11 power save..\n"));
 438
 439                         rtl_lps_set_psmode(hw, EACTIVE);
 440                 }
 441         }
 442         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flags);
 443 }
 444
 445 /* For sw LPS*/
 446 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
 447 {
 448         struct rtl_priv *rtlpriv = rtl_priv(hw);
 449         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 450         struct ieee80211_hdr *hdr = (void *) data;
 451         struct ieee80211_tim_ie *tim_ie;
 452         u8 *tim;
 453         u8 tim_len;
 454         bool u_buffed;
 455         bool m_buffed;
 456
 457         if (mac->opmode != NL80211_IFTYPE_STATION)
 458                 return;
 459
 460         if (!rtlpriv->psc.swctrl_lps)
 461                 return;
 462
 463         if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
 464                 return;
 465
 466         if (!rtlpriv->psc.sw_ps_enabled)
 467                 return;
 468
 469         if (rtlpriv->psc.fwctrl_lps)
 470                 return;
 471
 472         if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
 473                 return;
 474
 475         /* check if this really is a beacon */
 476         if (!ieee80211_is_beacon(hdr->frame_control))
 477                 return;
 478
 479         /* min. beacon length + FCS_LEN */
 480         if (len <= 40 + FCS_LEN)
 481                 return;
 482
 483         /* and only beacons from the associated BSSID, please */
 484         if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
 485                 return;
 486
 487         rtlpriv->psc.last_beacon = jiffies;
 488
 489         tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
 490         if (!tim)
 491                 return;
 492
 493         if (tim[1] < sizeof(*tim_ie))
 494                 return;
 495
 496         tim_len = tim[1];
 497         tim_ie = (struct ieee80211_tim_ie *) &tim[2];
 498
 499         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 500                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 501
 502         /* Check whenever the PHY can be turned off again. */
 503
 504         /* 1. What about buffered unicast traffic for our AID? */
 505         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 506                                        rtlpriv->mac80211.assoc_id);
 507
 508         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 509         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 510         rtlpriv->psc.multi_buffered = m_buffed;
 511
 512         /* unicast will process by mac80211 through
 513          * set ~IEEE80211_CONF_PS, So we just check
 514          * multicast frames here */
 515         if (!m_buffed) {
 516                 /* back to low-power land. and delay is
 517                  * prevent null power save frame tx fail */
 518                 queue_delayed_work(rtlpriv->works.rtl_wq,
 519                                 &rtlpriv->works.ps_work, MSECS(5));
 520         } else {
 521                 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
 522                                 "m_buffered: %x\n", u_buffed, m_buffed));
 523         }
 524 }
 525
 526 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 527 {
 528         struct rtl_priv *rtlpriv = rtl_priv(hw);
 529         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 530         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 531
 532         if (!rtlpriv->psc.swctrl_lps)
 533                 return;
 534         if (mac->link_state != MAC80211_LINKED)
 535                 return;
 536
 537         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 538                 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 539                 rtlpriv->intf_ops->disable_aspm(hw);
 540                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 541         }
 542
 543         spin_lock_irq(&rtlpriv->locks.lps_lock);
 544         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
 545         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 546 }
 547
 548 void rtl_swlps_rfon_wq_callback(void *data)
 549 {
 550         struct rtl_works *rtlworks =
 551             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 552         struct ieee80211_hw *hw = rtlworks->hw;
 553
 554         rtl_swlps_rf_awake(hw);
 555 }
 556
 557 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 558 {
 559         struct rtl_priv *rtlpriv = rtl_priv(hw);
 560         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 561         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 562         u8 sleep_intv;
 563
 564         if (!rtlpriv->psc.sw_ps_enabled)
 565                 return;
 566
 567         if ((rtlpriv->sec.being_setkey) ||
 568             (mac->opmode == NL80211_IFTYPE_ADHOC))
 569                 return;
 570
 571         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 572         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 573                 return;
 574
 575         if (rtlpriv->link_info.busytraffic)
 576                 return;
 577
 578         spin_lock_irq(&rtlpriv->locks.lps_lock);
 579         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
 580         spin_unlock_irq(&rtlpriv->locks.lps_lock);
 581
 582         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 583                 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 584                 rtlpriv->intf_ops->enable_aspm(hw);
 585                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 586         }
 587
 588         /* here is power save alg, when this beacon is DTIM
 589          * we will set sleep time to dtim_period * n;
 590          * when this beacon is not DTIM, we will set sleep
 591          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 592          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 593
 594         if (rtlpriv->psc.dtim_counter == 0) {
 595                 if (hw->conf.ps_dtim_period == 1)
 596                         sleep_intv = hw->conf.ps_dtim_period * 2;
 597                 else
 598                         sleep_intv = hw->conf.ps_dtim_period;
 599         } else {
 600                 sleep_intv = rtlpriv->psc.dtim_counter;
 601         }
 602
 603         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 604                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 605
 606         /* this print should always be dtim_conter = 0 &
 607          * sleep  = dtim_period, that meaons, we should
 608          * awake before every dtim */
 609         RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 610                  ("dtim_counter:%x will sleep :%d"
 611                  " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
 612
 613         /* we tested that 40ms is enough for sw & hw sw delay */
 614         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 615                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 616 }
 617
 618
 619 void rtl_swlps_wq_callback(void *data)
 620 {
 621         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 622                                      struct rtl_works,
 623                                      ps_work);
 624         struct ieee80211_hw *hw = rtlworks->hw;
 625         struct rtl_priv *rtlpriv = rtl_priv(hw);
 626         bool ps = false;
 627
 628         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 629
 630         /* we can sleep after ps null send ok */
 631         if (rtlpriv->psc.state_inap) {
 632                 rtl_swlps_rf_sleep(hw);
 633
 634                 if (rtlpriv->psc.state && !ps) {
 635                         rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
 636                                         rtlpriv->psc.last_action);
 637                 }
 638
 639                 if (ps)
 640                         rtlpriv->psc.last_slept = jiffies;
 641
 642                 rtlpriv->psc.last_action = jiffies;
 643                 rtlpriv->psc.state = ps;
 644         }
 645 }