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
  72         /*<3> Disable Adapter */
  73         rtlpriv->cfg->ops->hw_disable(hw);
  74
  75         return true;
  76 }
  77 EXPORT_SYMBOL(rtl_ps_disable_nic);
  78
  79 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
  80                          enum rf_pwrstate state_toset,
  81                          u32 changesource, bool protect_or_not)
  82 {
  83         struct rtl_priv *rtlpriv = rtl_priv(hw);
  84         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  85         enum rf_pwrstate rtstate;
  86         bool actionallowed = false;
  87         u16 rfwait_cnt = 0;
  88         unsigned long flag;
  89
  90         /*protect_or_not = true; */
  91
  92         if (protect_or_not)
  93                 goto no_protect;
  94
  95         /*
  96          *Only one thread can change
  97          *the RF state at one time, and others
  98          *should wait to be executed.
  99          */
 100         while (true) {
 101                 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
 102                 if (ppsc->rfchange_inprogress) {
 103                         spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
 104                                                flag);
 105
 106                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 107                                  ("RF Change in progress!"
 108                                   "Wait to set..state_toset(%d).\n",
 109                                   state_toset));
 110
 111                         /* Set RF after the previous action is done.  */
 112                         while (ppsc->rfchange_inprogress) {
 113                                 rfwait_cnt++;
 114                                 mdelay(1);
 115
 116                                 /*
 117                                  *Wait too long, return false to avoid
 118                                  *to be stuck here.
 119                                  */
 120                                 if (rfwait_cnt > 100)
 121                                         return false;
 122                         }
 123                 } else {
 124                         ppsc->rfchange_inprogress = true;
 125                         spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
 126                                                flag);
 127                         break;
 128                 }
 129         }
 130
 131 no_protect:
 132         rtstate = ppsc->rfpwr_state;
 133
 134         switch (state_toset) {
 135         case ERFON:
 136                 ppsc->rfoff_reason &= (~changesource);
 137
 138                 if ((changesource == RF_CHANGE_BY_HW) &&
 139                     (ppsc->hwradiooff == true)) {
 140                         ppsc->hwradiooff = false;
 141                 }
 142
 143                 if (!ppsc->rfoff_reason) {
 144                         ppsc->rfoff_reason = 0;
 145                         actionallowed = true;
 146                 }
 147
 148                 break;
 149
 150         case ERFOFF:
 151
 152                 if ((changesource == RF_CHANGE_BY_HW)
 153                     && (ppsc->hwradiooff == false)) {
 154                         ppsc->hwradiooff = true;
 155                 }
 156
 157                 ppsc->rfoff_reason |= changesource;
 158                 actionallowed = true;
 159                 break;
 160
 161         case ERFSLEEP:
 162                 ppsc->rfoff_reason |= changesource;
 163                 actionallowed = true;
 164                 break;
 165
 166         default:
 167                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 168                          ("switch case not process\n"));
 169                 break;
 170         }
 171
 172         if (actionallowed)
 173                 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
 174
 175         if (!protect_or_not) {
 176                 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
 177                 ppsc->rfchange_inprogress = false;
 178                 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
 179         }
 180
 181         return actionallowed;
 182 }
 183 EXPORT_SYMBOL(rtl_ps_set_rf_state);
 184
 185 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
 186 {
 187         struct rtl_priv *rtlpriv = rtl_priv(hw);
 188         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 189         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 190
 191         ppsc->swrf_processing = true;
 192
 193         if (ppsc->inactive_pwrstate == ERFOFF &&
 194             rtlhal->interface == INTF_PCI) {
 195                 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
 196                     RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 197                     rtlhal->interface == INTF_PCI) {
 198                         rtlpriv->intf_ops->disable_aspm(hw);
 199                         RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 200                 }
 201         }
 202
 203         rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
 204                             RF_CHANGE_BY_IPS, false);
 205
 206         if (ppsc->inactive_pwrstate == ERFOFF &&
 207             rtlhal->interface == INTF_PCI) {
 208                 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 209                         !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 210                         rtlpriv->intf_ops->enable_aspm(hw);
 211                         RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 212                 }
 213         }
 214
 215         ppsc->swrf_processing = false;
 216 }
 217
 218 void rtl_ips_nic_off_wq_callback(void *data)
 219 {
 220         struct rtl_works *rtlworks =
 221             container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
 222         struct ieee80211_hw *hw = rtlworks->hw;
 223         struct rtl_priv *rtlpriv = rtl_priv(hw);
 224         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 225         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 226         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 227         enum rf_pwrstate rtstate;
 228
 229         if (mac->opmode != NL80211_IFTYPE_STATION) {
 230                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 231                          ("not station return\n"));
 232                 return;
 233         }
 234
 235         if (mac->link_state > MAC80211_NOLINK)
 236                 return;
 237
 238         if (is_hal_stop(rtlhal))
 239                 return;
 240
 241         if (rtlpriv->sec.being_setkey)
 242                 return;
 243
 244         if (ppsc->inactiveps) {
 245                 rtstate = ppsc->rfpwr_state;
 246
 247                 /*
 248                  *Do not enter IPS in the following conditions:
 249                  *(1) RF is already OFF or Sleep
 250                  *(2) swrf_processing (indicates the IPS is still under going)
 251                  *(3) Connectted (only disconnected can trigger IPS)
 252                  *(4) IBSS (send Beacon)
 253                  *(5) AP mode (send Beacon)
 254                  *(6) monitor mode (rcv packet)
 255                  */
 256
 257                 if (rtstate == ERFON &&
 258                     !ppsc->swrf_processing &&
 259                     (mac->link_state == MAC80211_NOLINK) &&
 260                     !mac->act_scanning) {
 261                         RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
 262                                  ("IPSEnter(): Turn off RF.\n"));
 263
 264                         ppsc->inactive_pwrstate = ERFOFF;
 265                         ppsc->in_powersavemode = true;
 266
 267                         /*rtl_pci_reset_trx_ring(hw); */
 268                         _rtl_ps_inactive_ps(hw);
 269                 }
 270         }
 271 }
 272
 273 void rtl_ips_nic_off(struct ieee80211_hw *hw)
 274 {
 275         struct rtl_priv *rtlpriv = rtl_priv(hw);
 276
 277         /*
 278          *because when link with ap, mac80211 will ask us
 279          *to disable nic quickly after scan before linking,
 280          *this will cause link failed, so we delay 100ms here
 281          */
 282         queue_delayed_work(rtlpriv->works.rtl_wq,
 283                            &rtlpriv->works.ips_nic_off_wq, MSECS(100));
 284 }
 285
 286 void rtl_ips_nic_on(struct ieee80211_hw *hw)
 287 {
 288         struct rtl_priv *rtlpriv = rtl_priv(hw);
 289         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 290         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 291         enum rf_pwrstate rtstate;
 292         unsigned long flags;
 293
 294         if (mac->opmode != NL80211_IFTYPE_STATION)
 295                 return;
 296
 297         spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
 298
 299         if (ppsc->inactiveps) {
 300                 rtstate = ppsc->rfpwr_state;
 301
 302                 if (rtstate != ERFON &&
 303                     !ppsc->swrf_processing &&
 304                     ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
 305
 306                         ppsc->inactive_pwrstate = ERFON;
 307                         ppsc->in_powersavemode = false;
 308
 309                         _rtl_ps_inactive_ps(hw);
 310                 }
 311         }
 312
 313         spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
 314 }
 315
 316 /*for FW LPS*/
 317
 318 /*
 319  *Determine if we can set Fw into PS mode
 320  *in current condition.Return TRUE if it
 321  *can enter PS mode.
 322  */
 323 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
 324 {
 325         struct rtl_priv *rtlpriv = rtl_priv(hw);
 326         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 327         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 328         u32 ps_timediff;
 329
 330         ps_timediff = jiffies_to_msecs(jiffies -
 331                                        ppsc->last_delaylps_stamp_jiffies);
 332
 333         if (ps_timediff < 2000) {
 334                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 335                          ("Delay enter Fw LPS for DHCP, ARP,"
 336                           " or EAPOL exchanging state.\n"));
 337                 return false;
 338         }
 339
 340         if (mac->link_state != MAC80211_LINKED)
 341                 return false;
 342
 343         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 344                 return false;
 345
 346         return true;
 347 }
 348
 349 /* Change current and default preamble mode.*/
 350 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 351 {
 352         struct rtl_priv *rtlpriv = rtl_priv(hw);
 353         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 354         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 355         u8 rpwm_val, fw_pwrmode;
 356
 357         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 358                 return;
 359
 360         if (mac->link_state != MAC80211_LINKED)
 361                 return;
 362
 363         if (ppsc->dot11_psmode == rt_psmode)
 364                 return;
 365
 366         /* Update power save mode configured. */
 367         ppsc->dot11_psmode = rt_psmode;
 368
 369         /*
 370          *<FW control LPS>
 371          *1. Enter PS mode
 372          *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
 373          *   cmd to set Fw into PS mode.
 374          *2. Leave PS mode
 375          *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
 376          *   mode and set RPWM to turn RF on.
 377          */
 378
 379         if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
 380                 bool fw_current_inps;
 381                 if (ppsc->dot11_psmode == EACTIVE) {
 382                         RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 383                                  ("FW LPS leave ps_mode:%x\n",
 384                                   FW_PS_ACTIVE_MODE));
 385
 386                         rpwm_val = 0x0C;        /* RF on */
 387                         fw_pwrmode = FW_PS_ACTIVE_MODE;
 388                         rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
 389                                         (u8 *) (&rpwm_val));
 390                         rtlpriv->cfg->ops->set_hw_reg(hw,
 391                                         HW_VAR_H2C_FW_PWRMODE,
 392                                         (u8 *) (&fw_pwrmode));
 393                         fw_current_inps = false;
 394
 395                         rtlpriv->cfg->ops->set_hw_reg(hw,
 396                                         HW_VAR_FW_PSMODE_STATUS,
 397                                         (u8 *) (&fw_current_inps));
 398
 399                 } else {
 400                         if (rtl_get_fwlps_doze(hw)) {
 401                                 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 402                                                 ("FW LPS enter ps_mode:%x\n",
 403                                                  ppsc->fwctrl_psmode));
 404
 405                                 rpwm_val = 0x02;        /* RF off */
 406                                 fw_current_inps = true;
 407                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 408                                                 HW_VAR_FW_PSMODE_STATUS,
 409                                                 (u8 *) (&fw_current_inps));
 410                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 411                                                 HW_VAR_H2C_FW_PWRMODE,
 412                                                 (u8 *) (&ppsc->fwctrl_psmode));
 413
 414                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 415                                                 HW_VAR_SET_RPWM,
 416                                                 (u8 *) (&rpwm_val));
 417                         } else {
 418                                 /* Reset the power save related parameters. */
 419                                 ppsc->dot11_psmode = EACTIVE;
 420                         }
 421                 }
 422         }
 423 }
 424
 425 /*Enter the leisure power save mode.*/
 426 void rtl_lps_enter(struct ieee80211_hw *hw)
 427 {
 428         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 429         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 430         struct rtl_priv *rtlpriv = rtl_priv(hw);
 431         unsigned long flag;
 432
 433         if (!ppsc->fwctrl_lps)
 434                 return;
 435
 436         if (rtlpriv->sec.being_setkey)
 437                 return;
 438
 439         if (rtlpriv->link_info.busytraffic)
 440                 return;
 441
 442         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 443         if (mac->cnt_after_linked < 5)
 444                 return;
 445
 446         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 447                 return;
 448
 449         if (mac->link_state != MAC80211_LINKED)
 450                 return;
 451
 452         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 453
 454         /* Idle for a while if we connect to AP a while ago. */
 455         if (mac->cnt_after_linked >= 2) {
 456                 if (ppsc->dot11_psmode == EACTIVE) {
 457                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 458                                         ("Enter 802.11 power save mode...\n"));
 459
 460                         rtl_lps_set_psmode(hw, EAUTOPS);
 461                 }
 462         }
 463
 464         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 465 }
 466
 467 /*Leave the leisure power save mode.*/
 468 void rtl_lps_leave(struct ieee80211_hw *hw)
 469 {
 470         struct rtl_priv *rtlpriv = rtl_priv(hw);
 471         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 472         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 473         unsigned long flag;
 474
 475         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 476
 477         if (ppsc->fwctrl_lps) {
 478                 if (ppsc->dot11_psmode != EACTIVE) {
 479
 480                         /*FIX ME */
 481                         rtlpriv->cfg->ops->enable_interrupt(hw);
 482
 483                         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 484                             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 485                             rtlhal->interface == INTF_PCI) {
 486                                 rtlpriv->intf_ops->disable_aspm(hw);
 487                                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 488                         }
 489
 490                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 491                                  ("Busy Traffic,Leave 802.11 power save..\n"));
 492
 493                         rtl_lps_set_psmode(hw, EACTIVE);
 494                 }
 495         }
 496         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 497 }
 498
 499 /* For sw LPS*/
 500 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
 501 {
 502         struct rtl_priv *rtlpriv = rtl_priv(hw);
 503         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 504         struct ieee80211_hdr *hdr = (void *) data;
 505         struct ieee80211_tim_ie *tim_ie;
 506         u8 *tim;
 507         u8 tim_len;
 508         bool u_buffed;
 509         bool m_buffed;
 510
 511         if (mac->opmode != NL80211_IFTYPE_STATION)
 512                 return;
 513
 514         if (!rtlpriv->psc.swctrl_lps)
 515                 return;
 516
 517         if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
 518                 return;
 519
 520         if (!rtlpriv->psc.sw_ps_enabled)
 521                 return;
 522
 523         if (rtlpriv->psc.fwctrl_lps)
 524                 return;
 525
 526         if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
 527                 return;
 528
 529         /* check if this really is a beacon */
 530         if (!ieee80211_is_beacon(hdr->frame_control))
 531                 return;
 532
 533         /* min. beacon length + FCS_LEN */
 534         if (len <= 40 + FCS_LEN)
 535                 return;
 536
 537         /* and only beacons from the associated BSSID, please */
 538         if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
 539                 return;
 540
 541         rtlpriv->psc.last_beacon = jiffies;
 542
 543         tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
 544         if (!tim)
 545                 return;
 546
 547         if (tim[1] < sizeof(*tim_ie))
 548                 return;
 549
 550         tim_len = tim[1];
 551         tim_ie = (struct ieee80211_tim_ie *) &tim[2];
 552
 553         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 554                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 555
 556         /* Check whenever the PHY can be turned off again. */
 557
 558         /* 1. What about buffered unicast traffic for our AID? */
 559         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 560                                        rtlpriv->mac80211.assoc_id);
 561
 562         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 563         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 564         rtlpriv->psc.multi_buffered = m_buffed;
 565
 566         /* unicast will process by mac80211 through
 567          * set ~IEEE80211_CONF_PS, So we just check
 568          * multicast frames here */
 569         if (!m_buffed) {
 570                 /* back to low-power land. and delay is
 571                  * prevent null power save frame tx fail */
 572                 queue_delayed_work(rtlpriv->works.rtl_wq,
 573                                 &rtlpriv->works.ps_work, MSECS(5));
 574         } else {
 575                 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
 576                                 "m_buffered: %x\n", u_buffed, m_buffed));
 577         }
 578 }
 579
 580 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 581 {
 582         struct rtl_priv *rtlpriv = rtl_priv(hw);
 583         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 584         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 585         unsigned long flag;
 586
 587         if (!rtlpriv->psc.swctrl_lps)
 588                 return;
 589         if (mac->link_state != MAC80211_LINKED)
 590                 return;
 591
 592         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 593                 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 594                 rtlpriv->intf_ops->disable_aspm(hw);
 595                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 596         }
 597
 598         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 599         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
 600         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 601 }
 602
 603 void rtl_swlps_rfon_wq_callback(void *data)
 604 {
 605         struct rtl_works *rtlworks =
 606             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 607         struct ieee80211_hw *hw = rtlworks->hw;
 608
 609         rtl_swlps_rf_awake(hw);
 610 }
 611
 612 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 613 {
 614         struct rtl_priv *rtlpriv = rtl_priv(hw);
 615         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 616         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 617         unsigned long flag;
 618         u8 sleep_intv;
 619
 620         if (!rtlpriv->psc.sw_ps_enabled)
 621                 return;
 622
 623         if ((rtlpriv->sec.being_setkey) ||
 624             (mac->opmode == NL80211_IFTYPE_ADHOC))
 625                 return;
 626
 627         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 628         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 629                 return;
 630
 631         if (rtlpriv->link_info.busytraffic)
 632                 return;
 633
 634         spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
 635         if (rtlpriv->psc.rfchange_inprogress) {
 636                 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
 637                 return;
 638         }
 639         spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
 640
 641         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 642         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS, false);
 643         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 644
 645         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 646                 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 647                 rtlpriv->intf_ops->enable_aspm(hw);
 648                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 649         }
 650
 651         /* here is power save alg, when this beacon is DTIM
 652          * we will set sleep time to dtim_period * n;
 653          * when this beacon is not DTIM, we will set sleep
 654          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 655          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 656
 657         if (rtlpriv->psc.dtim_counter == 0) {
 658                 if (hw->conf.ps_dtim_period == 1)
 659                         sleep_intv = hw->conf.ps_dtim_period * 2;
 660                 else
 661                         sleep_intv = hw->conf.ps_dtim_period;
 662         } else {
 663                 sleep_intv = rtlpriv->psc.dtim_counter;
 664         }
 665
 666         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 667                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 668
 669         /* this print should always be dtim_conter = 0 &
 670          * sleep  = dtim_period, that meaons, we should
 671          * awake before every dtim */
 672         RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 673                  ("dtim_counter:%x will sleep :%d"
 674                  " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
 675
 676         /* we tested that 40ms is enough for sw & hw sw delay */
 677         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 678                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 679 }
 680
 681
 682 void rtl_swlps_wq_callback(void *data)
 683 {
 684         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 685                                      struct rtl_works,
 686                                      ps_work);
 687         struct ieee80211_hw *hw = rtlworks->hw;
 688         struct rtl_priv *rtlpriv = rtl_priv(hw);
 689         bool ps = false;
 690
 691         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 692
 693         /* we can sleep after ps null send ok */
 694         if (rtlpriv->psc.state_inap) {
 695                 rtl_swlps_rf_sleep(hw);
 696
 697                 if (rtlpriv->psc.state && !ps) {
 698                         rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
 699                                         rtlpriv->psc.last_action);
 700                 }
 701
 702                 if (ps)
 703                         rtlpriv->psc.last_slept = jiffies;
 704
 705                 rtlpriv->psc.last_action = jiffies;
 706                 rtlpriv->psc.state = ps;
 707         }
 708 }