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, bool protect_or_not)
  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         u16 rfwait_cnt = 0;
  88
  89         /*protect_or_not = true; */
  90
  91         if (protect_or_not)
  92                 goto no_protect;
  93
  94         /*
  95          *Only one thread can change
  96          *the RF state at one time, and others
  97          *should wait to be executed.
  98          */
  99         while (true) {
 100                 spin_lock(&rtlpriv->locks.rf_ps_lock);
 101                 if (ppsc->rfchange_inprogress) {
 102                         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 103
 104                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 105                                  ("RF Change in progress!"
 106                                   "Wait to set..state_toset(%d).\n",
 107                                   state_toset));
 108
 109                         /* Set RF after the previous action is done.  */
 110                         while (ppsc->rfchange_inprogress) {
 111                                 rfwait_cnt++;
 112                                 mdelay(1);
 113
 114                                 /*
 115                                  *Wait too long, return false to avoid
 116                                  *to be stuck here.
 117                                  */
 118                                 if (rfwait_cnt > 100)
 119                                         return false;
 120                         }
 121                 } else {
 122                         ppsc->rfchange_inprogress = true;
 123                         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 124                         break;
 125                 }
 126         }
 127
 128 no_protect:
 129         switch (state_toset) {
 130         case ERFON:
 131                 ppsc->rfoff_reason &= (~changesource);
 132
 133                 if ((changesource == RF_CHANGE_BY_HW) &&
 134                     (ppsc->hwradiooff == true)) {
 135                         ppsc->hwradiooff = false;
 136                 }
 137
 138                 if (!ppsc->rfoff_reason) {
 139                         ppsc->rfoff_reason = 0;
 140                         actionallowed = true;
 141                 }
 142
 143                 break;
 144
 145         case ERFOFF:
 146
 147                 if ((changesource == RF_CHANGE_BY_HW)
 148                     && (ppsc->hwradiooff == false)) {
 149                         ppsc->hwradiooff = true;
 150                 }
 151
 152                 ppsc->rfoff_reason |= changesource;
 153                 actionallowed = true;
 154                 break;
 155
 156         case ERFSLEEP:
 157                 ppsc->rfoff_reason |= changesource;
 158                 actionallowed = true;
 159                 break;
 160
 161         default:
 162                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 163                          ("switch case not process\n"));
 164                 break;
 165         }
 166
 167         if (actionallowed)
 168                 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
 169
 170         if (!protect_or_not) {
 171                 spin_lock(&rtlpriv->locks.rf_ps_lock);
 172                 ppsc->rfchange_inprogress = false;
 173                 spin_unlock(&rtlpriv->locks.rf_ps_lock);
 174         }
 175
 176         return actionallowed;
 177 }
 178 EXPORT_SYMBOL(rtl_ps_set_rf_state);
 179
 180 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
 181 {
 182         struct rtl_priv *rtlpriv = rtl_priv(hw);
 183         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 184         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 185
 186         ppsc->swrf_processing = true;
 187
 188         if (ppsc->inactive_pwrstate == ERFON &&
 189             rtlhal->interface == INTF_PCI) {
 190                 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
 191                     RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 192                     rtlhal->interface == INTF_PCI) {
 193                         rtlpriv->intf_ops->disable_aspm(hw);
 194                         RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 195                 }
 196         }
 197
 198         rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
 199                             RF_CHANGE_BY_IPS, false);
 200
 201         if (ppsc->inactive_pwrstate == ERFOFF &&
 202             rtlhal->interface == INTF_PCI) {
 203                 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 204                         !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 205                         rtlpriv->intf_ops->enable_aspm(hw);
 206                         RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 207                 }
 208         }
 209
 210         ppsc->swrf_processing = false;
 211 }
 212
 213 void rtl_ips_nic_off_wq_callback(void *data)
 214 {
 215         struct rtl_works *rtlworks =
 216             container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
 217         struct ieee80211_hw *hw = rtlworks->hw;
 218         struct rtl_priv *rtlpriv = rtl_priv(hw);
 219         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 220         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 221         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 222         enum rf_pwrstate rtstate;
 223
 224         if (mac->opmode != NL80211_IFTYPE_STATION) {
 225                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 226                          ("not station return\n"));
 227                 return;
 228         }
 229
 230         if (mac->link_state > MAC80211_NOLINK)
 231                 return;
 232
 233         if (is_hal_stop(rtlhal))
 234                 return;
 235
 236         if (rtlpriv->sec.being_setkey)
 237                 return;
 238
 239         if (ppsc->inactiveps) {
 240                 rtstate = ppsc->rfpwr_state;
 241
 242                 /*
 243                  *Do not enter IPS in the following conditions:
 244                  *(1) RF is already OFF or Sleep
 245                  *(2) swrf_processing (indicates the IPS is still under going)
 246                  *(3) Connectted (only disconnected can trigger IPS)
 247                  *(4) IBSS (send Beacon)
 248                  *(5) AP mode (send Beacon)
 249                  *(6) monitor mode (rcv packet)
 250                  */
 251
 252                 if (rtstate == ERFON &&
 253                     !ppsc->swrf_processing &&
 254                     (mac->link_state == MAC80211_NOLINK) &&
 255                     !mac->act_scanning) {
 256                         RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
 257                                  ("IPSEnter(): Turn off RF.\n"));
 258
 259                         ppsc->inactive_pwrstate = ERFOFF;
 260                         ppsc->in_powersavemode = true;
 261
 262                         /*rtl_pci_reset_trx_ring(hw); */
 263                         _rtl_ps_inactive_ps(hw);
 264                 }
 265         }
 266 }
 267
 268 void rtl_ips_nic_off(struct ieee80211_hw *hw)
 269 {
 270         struct rtl_priv *rtlpriv = rtl_priv(hw);
 271
 272         /*
 273          *because when link with ap, mac80211 will ask us
 274          *to disable nic quickly after scan before linking,
 275          *this will cause link failed, so we delay 100ms here
 276          */
 277         queue_delayed_work(rtlpriv->works.rtl_wq,
 278                            &rtlpriv->works.ips_nic_off_wq, MSECS(100));
 279 }
 280
 281 void rtl_ips_nic_on(struct ieee80211_hw *hw)
 282 {
 283         struct rtl_priv *rtlpriv = rtl_priv(hw);
 284         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 285         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 286         enum rf_pwrstate rtstate;
 287
 288         if (mac->opmode != NL80211_IFTYPE_STATION)
 289                 return;
 290
 291         spin_lock(&rtlpriv->locks.ips_lock);
 292
 293         if (ppsc->inactiveps) {
 294                 rtstate = ppsc->rfpwr_state;
 295
 296                 if (rtstate != ERFON &&
 297                     !ppsc->swrf_processing &&
 298                     ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
 299
 300                         ppsc->inactive_pwrstate = ERFON;
 301                         ppsc->in_powersavemode = false;
 302
 303                         _rtl_ps_inactive_ps(hw);
 304                 }
 305         }
 306
 307         spin_unlock(&rtlpriv->locks.ips_lock);
 308 }
 309
 310 /*for FW LPS*/
 311
 312 /*
 313  *Determine if we can set Fw into PS mode
 314  *in current condition.Return TRUE if it
 315  *can enter PS mode.
 316  */
 317 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
 318 {
 319         struct rtl_priv *rtlpriv = rtl_priv(hw);
 320         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 321         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 322         u32 ps_timediff;
 323
 324         ps_timediff = jiffies_to_msecs(jiffies -
 325                                        ppsc->last_delaylps_stamp_jiffies);
 326
 327         if (ps_timediff < 2000) {
 328                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 329                          ("Delay enter Fw LPS for DHCP, ARP,"
 330                           " or EAPOL exchanging state.\n"));
 331                 return false;
 332         }
 333
 334         if (mac->link_state != MAC80211_LINKED)
 335                 return false;
 336
 337         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 338                 return false;
 339
 340         return true;
 341 }
 342
 343 /* Change current and default preamble mode.*/
 344 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 345 {
 346         struct rtl_priv *rtlpriv = rtl_priv(hw);
 347         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 348         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 349         u8 rpwm_val, fw_pwrmode;
 350
 351         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 352                 return;
 353
 354         if (mac->link_state != MAC80211_LINKED)
 355                 return;
 356
 357         if (ppsc->dot11_psmode == rt_psmode)
 358                 return;
 359
 360         /* Update power save mode configured. */
 361         ppsc->dot11_psmode = rt_psmode;
 362
 363         /*
 364          *<FW control LPS>
 365          *1. Enter PS mode
 366          *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
 367          *   cmd to set Fw into PS mode.
 368          *2. Leave PS mode
 369          *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
 370          *   mode and set RPWM to turn RF on.
 371          */
 372
 373         if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
 374                 bool fw_current_inps;
 375                 if (ppsc->dot11_psmode == EACTIVE) {
 376                         RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 377                                  ("FW LPS leave ps_mode:%x\n",
 378                                   FW_PS_ACTIVE_MODE));
 379
 380                         rpwm_val = 0x0C;        /* RF on */
 381                         fw_pwrmode = FW_PS_ACTIVE_MODE;
 382                         rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
 383                                         (u8 *) (&rpwm_val));
 384                         rtlpriv->cfg->ops->set_hw_reg(hw,
 385                                         HW_VAR_H2C_FW_PWRMODE,
 386                                         (u8 *) (&fw_pwrmode));
 387                         fw_current_inps = false;
 388
 389                         rtlpriv->cfg->ops->set_hw_reg(hw,
 390                                         HW_VAR_FW_PSMODE_STATUS,
 391                                         (u8 *) (&fw_current_inps));
 392
 393                 } else {
 394                         if (rtl_get_fwlps_doze(hw)) {
 395                                 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 396                                                 ("FW LPS enter ps_mode:%x\n",
 397                                                  ppsc->fwctrl_psmode));
 398
 399                                 rpwm_val = 0x02;        /* RF off */
 400                                 fw_current_inps = true;
 401                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 402                                                 HW_VAR_FW_PSMODE_STATUS,
 403                                                 (u8 *) (&fw_current_inps));
 404                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 405                                                 HW_VAR_H2C_FW_PWRMODE,
 406                                                 (u8 *) (&ppsc->fwctrl_psmode));
 407
 408                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 409                                                 HW_VAR_SET_RPWM,
 410                                                 (u8 *) (&rpwm_val));
 411                         } else {
 412                                 /* Reset the power save related parameters. */
 413                                 ppsc->dot11_psmode = EACTIVE;
 414                         }
 415                 }
 416         }
 417 }
 418
 419 /*Enter the leisure power save mode.*/
 420 void rtl_lps_enter(struct ieee80211_hw *hw)
 421 {
 422         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 423         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 424         struct rtl_priv *rtlpriv = rtl_priv(hw);
 425
 426         if (!ppsc->fwctrl_lps)
 427                 return;
 428
 429         if (rtlpriv->sec.being_setkey)
 430                 return;
 431
 432         if (rtlpriv->link_info.busytraffic)
 433                 return;
 434
 435         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 436         if (mac->cnt_after_linked < 5)
 437                 return;
 438
 439         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 440                 return;
 441
 442         if (mac->link_state != MAC80211_LINKED)
 443                 return;
 444
 445         spin_lock(&rtlpriv->locks.lps_lock);
 446
 447         /* Idle for a while if we connect to AP a while ago. */
 448         if (mac->cnt_after_linked >= 2) {
 449                 if (ppsc->dot11_psmode == EACTIVE) {
 450                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 451                                         ("Enter 802.11 power save mode...\n"));
 452
 453                         rtl_lps_set_psmode(hw, EAUTOPS);
 454                 }
 455         }
 456
 457         spin_unlock(&rtlpriv->locks.lps_lock);
 458 }
 459
 460 /*Leave the leisure power save mode.*/
 461 void rtl_lps_leave(struct ieee80211_hw *hw)
 462 {
 463         struct rtl_priv *rtlpriv = rtl_priv(hw);
 464         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 465         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 466
 467         spin_lock(&rtlpriv->locks.lps_lock);
 468
 469         if (ppsc->fwctrl_lps) {
 470                 if (ppsc->dot11_psmode != EACTIVE) {
 471
 472                         /*FIX ME */
 473                         rtlpriv->cfg->ops->enable_interrupt(hw);
 474
 475                         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 476                             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 477                             rtlhal->interface == INTF_PCI) {
 478                                 rtlpriv->intf_ops->disable_aspm(hw);
 479                                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 480                         }
 481
 482                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 483                                  ("Busy Traffic,Leave 802.11 power save..\n"));
 484
 485                         rtl_lps_set_psmode(hw, EACTIVE);
 486                 }
 487         }
 488         spin_unlock(&rtlpriv->locks.lps_lock);
 489 }
 490
 491 /* For sw LPS*/
 492 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
 493 {
 494         struct rtl_priv *rtlpriv = rtl_priv(hw);
 495         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 496         struct ieee80211_hdr *hdr = (void *) data;
 497         struct ieee80211_tim_ie *tim_ie;
 498         u8 *tim;
 499         u8 tim_len;
 500         bool u_buffed;
 501         bool m_buffed;
 502
 503         if (mac->opmode != NL80211_IFTYPE_STATION)
 504                 return;
 505
 506         if (!rtlpriv->psc.swctrl_lps)
 507                 return;
 508
 509         if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
 510                 return;
 511
 512         if (!rtlpriv->psc.sw_ps_enabled)
 513                 return;
 514
 515         if (rtlpriv->psc.fwctrl_lps)
 516                 return;
 517
 518         if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
 519                 return;
 520
 521         /* check if this really is a beacon */
 522         if (!ieee80211_is_beacon(hdr->frame_control))
 523                 return;
 524
 525         /* min. beacon length + FCS_LEN */
 526         if (len <= 40 + FCS_LEN)
 527                 return;
 528
 529         /* and only beacons from the associated BSSID, please */
 530         if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
 531                 return;
 532
 533         rtlpriv->psc.last_beacon = jiffies;
 534
 535         tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
 536         if (!tim)
 537                 return;
 538
 539         if (tim[1] < sizeof(*tim_ie))
 540                 return;
 541
 542         tim_len = tim[1];
 543         tim_ie = (struct ieee80211_tim_ie *) &tim[2];
 544
 545         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 546                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 547
 548         /* Check whenever the PHY can be turned off again. */
 549
 550         /* 1. What about buffered unicast traffic for our AID? */
 551         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 552                                        rtlpriv->mac80211.assoc_id);
 553
 554         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 555         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 556         rtlpriv->psc.multi_buffered = m_buffed;
 557
 558         /* unicast will process by mac80211 through
 559          * set ~IEEE80211_CONF_PS, So we just check
 560          * multicast frames here */
 561         if (!m_buffed) {
 562                 /* back to low-power land. and delay is
 563                  * prevent null power save frame tx fail */
 564                 queue_delayed_work(rtlpriv->works.rtl_wq,
 565                                 &rtlpriv->works.ps_work, MSECS(5));
 566         } else {
 567                 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
 568                                 "m_buffered: %x\n", u_buffed, m_buffed));
 569         }
 570 }
 571
 572 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 573 {
 574         struct rtl_priv *rtlpriv = rtl_priv(hw);
 575         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 576         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 577
 578         if (!rtlpriv->psc.swctrl_lps)
 579                 return;
 580         if (mac->link_state != MAC80211_LINKED)
 581                 return;
 582
 583         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 584                 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 585                 rtlpriv->intf_ops->disable_aspm(hw);
 586                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 587         }
 588
 589         spin_lock(&rtlpriv->locks.lps_lock);
 590         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
 591         spin_unlock(&rtlpriv->locks.lps_lock);
 592 }
 593
 594 void rtl_swlps_rfon_wq_callback(void *data)
 595 {
 596         struct rtl_works *rtlworks =
 597             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 598         struct ieee80211_hw *hw = rtlworks->hw;
 599
 600         rtl_swlps_rf_awake(hw);
 601 }
 602
 603 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 604 {
 605         struct rtl_priv *rtlpriv = rtl_priv(hw);
 606         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 607         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 608         u8 sleep_intv;
 609
 610         if (!rtlpriv->psc.sw_ps_enabled)
 611                 return;
 612
 613         if ((rtlpriv->sec.being_setkey) ||
 614             (mac->opmode == NL80211_IFTYPE_ADHOC))
 615                 return;
 616
 617         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 618         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 619                 return;
 620
 621         if (rtlpriv->link_info.busytraffic)
 622                 return;
 623
 624         spin_lock(&rtlpriv->locks.rf_ps_lock);
 625         if (rtlpriv->psc.rfchange_inprogress) {
 626                 spin_unlock(&rtlpriv->locks.rf_ps_lock);
 627                 return;
 628         }
 629         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 630
 631         spin_lock(&rtlpriv->locks.lps_lock);
 632         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS, false);
 633         spin_unlock(&rtlpriv->locks.lps_lock);
 634
 635         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 636                 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 637                 rtlpriv->intf_ops->enable_aspm(hw);
 638                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 639         }
 640
 641         /* here is power save alg, when this beacon is DTIM
 642          * we will set sleep time to dtim_period * n;
 643          * when this beacon is not DTIM, we will set sleep
 644          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 645          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 646
 647         if (rtlpriv->psc.dtim_counter == 0) {
 648                 if (hw->conf.ps_dtim_period == 1)
 649                         sleep_intv = hw->conf.ps_dtim_period * 2;
 650                 else
 651                         sleep_intv = hw->conf.ps_dtim_period;
 652         } else {
 653                 sleep_intv = rtlpriv->psc.dtim_counter;
 654         }
 655
 656         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 657                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 658
 659         /* this print should always be dtim_conter = 0 &
 660          * sleep  = dtim_period, that meaons, we should
 661          * awake before every dtim */
 662         RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 663                  ("dtim_counter:%x will sleep :%d"
 664                  " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
 665
 666         /* we tested that 40ms is enough for sw & hw sw delay */
 667         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 668                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 669 }
 670
 671
 672 void rtl_swlps_wq_callback(void *data)
 673 {
 674         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 675                                      struct rtl_works,
 676                                      ps_work);
 677         struct ieee80211_hw *hw = rtlworks->hw;
 678         struct rtl_priv *rtlpriv = rtl_priv(hw);
 679         bool ps = false;
 680
 681         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 682
 683         /* we can sleep after ps null send ok */
 684         if (rtlpriv->psc.state_inap) {
 685                 rtl_swlps_rf_sleep(hw);
 686
 687                 if (rtlpriv->psc.state && !ps) {
 688                         rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
 689                                         rtlpriv->psc.last_action);
 690                 }
 691
 692                 if (ps)
 693                         rtlpriv->psc.last_slept = jiffies;
 694
 695                 rtlpriv->psc.last_action = jiffies;
 696                 rtlpriv->psc.state = ps;
 697         }
 698 }