drivers/staging/rtl8821ae/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 <[email protected]>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  * Larry Finger <[email protected]>
  27  *
  28  *****************************************************************************/
  29
  30 #include "wifi.h"
  31 #include "base.h"
  32 #include "ps.h"
  33 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
  34 #include <linux/export.h>
  35 #endif
  36 #include "btcoexist/rtl_btc.h"
  37
  38 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
  39 {
  40         struct rtl_priv *rtlpriv = rtl_priv(hw);
  41         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  42         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
  43         bool init_status = true;
  44
  45         /*<1> reset trx ring */
  46         if (rtlhal->interface == INTF_PCI)
  47                 rtlpriv->intf_ops->reset_trx_ring(hw);
  48
  49         if (is_hal_stop(rtlhal))
  50                 RT_TRACE(COMP_ERR, DBG_WARNING, ("Driver is already down!\n"));
  51
  52         /*<2> Enable Adapter */
  53         rtlpriv->cfg->ops->hw_init(hw);
  54         RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
  55         /*init_status = false; */
  56
  57         /*<3> Enable Interrupt */
  58         rtlpriv->cfg->ops->enable_interrupt(hw);
  59
  60         /*<enable timer> */
  61         rtl_watch_dog_timer_callback((unsigned long)hw);
  62
  63         return init_status;
  64 }
  65 //EXPORT_SYMBOL(rtl_ps_enable_nic);
  66
  67 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
  68 {
  69         bool status = true;
  70         struct rtl_priv *rtlpriv = rtl_priv(hw);
  71
  72         /*<1> Stop all timer */
  73         rtl_deinit_deferred_work(hw);
  74
  75         /*<2> Disable Interrupt */
  76         rtlpriv->cfg->ops->disable_interrupt(hw);
  77
  78         /*<3> Disable Adapter */
  79         rtlpriv->cfg->ops->hw_disable(hw);
  80
  81         return status;
  82 }
  83 //EXPORT_SYMBOL(rtl_ps_disable_nic);
  84
  85 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
  86                          enum rf_pwrstate state_toset,
  87                          u32 changesource, bool protect_or_not)
  88 {
  89         struct rtl_priv *rtlpriv = rtl_priv(hw);
  90         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
  91         enum rf_pwrstate rtstate;
  92         bool b_actionallowed = false;
  93         u16 rfwait_cnt = 0;
  94
  95         /*protect_or_not = true; */
  96
  97         if (protect_or_not)
  98                 goto no_protect;
  99
 100         /*
 101          *Only one thread can change
 102          *the RF state at one time, and others
 103          *should wait to be executed.
 104          */
 105         while (true) {
 106                 spin_lock(&rtlpriv->locks.rf_ps_lock);
 107                 if (ppsc->rfchange_inprogress) {
 108                         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 109
 110                         RT_TRACE(COMP_ERR, DBG_WARNING,
 111                                  ("RF Change in progress!"
 112                                   "Wait to set..state_toset(%d).\n",
 113                                   state_toset));
 114
 115                         /* Set RF after the previous action is done.  */
 116                         while (ppsc->rfchange_inprogress) {
 117                                 rfwait_cnt++;
 118                                 mdelay(1);
 119                                 /*
 120                                  *Wait too long, return false to avoid
 121                                  *to be stuck here.
 122                                  */
 123                                 if (rfwait_cnt > 100)
 124                                         return false;
 125                         }
 126                 } else {
 127                         ppsc->rfchange_inprogress = true;
 128                         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 129                         break;
 130                 }
 131         }
 132
 133 no_protect:
 134         rtstate = ppsc->rfpwr_state;
 135
 136         switch (state_toset) {
 137         case ERFON:
 138                 ppsc->rfoff_reason &= (~changesource);
 139
 140                 if ((changesource == RF_CHANGE_BY_HW) &&
 141                     (ppsc->b_hwradiooff == true)) {
 142                         ppsc->b_hwradiooff = false;
 143                 }
 144
 145                 if (!ppsc->rfoff_reason) {
 146                         ppsc->rfoff_reason = 0;
 147                         b_actionallowed = true;
 148                 }
 149
 150                 break;
 151
 152         case ERFOFF:
 153
 154                 if ((changesource == RF_CHANGE_BY_HW) &&
 155                     (ppsc->b_hwradiooff == false)) {
 156                         ppsc->b_hwradiooff = true;
 157                 }
 158
 159                 ppsc->rfoff_reason |= changesource;
 160                 b_actionallowed = true;
 161                 break;
 162
 163         case ERFSLEEP:
 164                 ppsc->rfoff_reason |= changesource;
 165                 b_actionallowed = true;
 166                 break;
 167
 168         default:
 169                 RT_TRACE(COMP_ERR, DBG_EMERG, ("switch case not process \n"));
 170                 break;
 171         }
 172
 173         if (b_actionallowed)
 174                 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
 175
 176         if (!protect_or_not) {
 177                 spin_lock(&rtlpriv->locks.rf_ps_lock);
 178                 ppsc->rfchange_inprogress = false;
 179                 spin_unlock(&rtlpriv->locks.rf_ps_lock);
 180         }
 181
 182         return b_actionallowed;
 183 }
 184 //EXPORT_SYMBOL(rtl_ps_set_rf_state);
 185
 186 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
 187 {
 188         struct rtl_priv *rtlpriv = rtl_priv(hw);
 189         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 190         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 191
 192         ppsc->b_swrf_processing = true;
 193
 194         if (ppsc->inactive_pwrstate == ERFON && 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         if (rtlpriv->cfg->ops->get_btc_status()){
 204                 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
 205                                                 ppsc->inactive_pwrstate);
 206         }
 207         rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
 208                             RF_CHANGE_BY_IPS, false);
 209
 210         if (ppsc->inactive_pwrstate == ERFOFF &&
 211             rtlhal->interface == INTF_PCI) {
 212                 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 213                     !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 214                         rtlpriv->intf_ops->enable_aspm(hw);
 215                         RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 216                 }
 217         }
 218
 219         ppsc->b_swrf_processing = false;
 220 }
 221
 222 void rtl_ips_nic_off_wq_callback(void *data)
 223 {
 224         struct rtl_works *rtlworks =
 225             container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
 226         struct ieee80211_hw *hw = rtlworks->hw;
 227         struct rtl_priv *rtlpriv = rtl_priv(hw);
 228         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 229         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 230         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 231         enum rf_pwrstate rtstate;
 232
 233         if (mac->opmode != NL80211_IFTYPE_STATION) {
 234                 RT_TRACE(COMP_ERR, DBG_WARNING, ("not station return\n"));
 235                 return;
 236         }
 237
 238         if (mac->p2p_in_use)
 239                 return;
 240
 241         if (mac->link_state > MAC80211_NOLINK)
 242                 return;
 243
 244         if (is_hal_stop(rtlhal))
 245                 return;
 246
 247         if (rtlpriv->sec.being_setkey)
 248                 return;
 249
 250         if(rtlpriv->cfg->ops->bt_turn_off_bt_coexist_before_enter_lps)
 251                 rtlpriv->cfg->ops->bt_turn_off_bt_coexist_before_enter_lps(hw);
 252
 253         if (ppsc->b_inactiveps) {
 254                 rtstate = ppsc->rfpwr_state;
 255
 256                 /*
 257                  *Do not enter IPS in the following conditions:
 258                  *(1) RF is already OFF or Sleep
 259                  *(2) b_swrf_processing (indicates the IPS is still under going)
 260                  *(3) Connectted (only disconnected can trigger IPS)
 261                  *(4) IBSS (send Beacon)
 262                  *(5) AP mode (send Beacon)
 263                  *(6) monitor mode (rcv packet)
 264                  */
 265
 266                 if (rtstate == ERFON &&
 267                     !ppsc->b_swrf_processing &&
 268                     (mac->link_state == MAC80211_NOLINK) &&
 269                     !mac->act_scanning) {
 270                         RT_TRACE(COMP_RF, DBG_LOUD,
 271                                  ("IPSEnter(): Turn off RF.\n"));
 272
 273                         ppsc->inactive_pwrstate = ERFOFF;
 274                         ppsc->b_in_powersavemode = true;
 275
 276                         /*rtl_pci_reset_trx_ring(hw); */
 277                         _rtl_ps_inactive_ps(hw);
 278                 }
 279         }
 280 }
 281
 282 void rtl_ips_nic_off(struct ieee80211_hw *hw)
 283 {
 284         struct rtl_priv *rtlpriv = rtl_priv(hw);
 285
 286         /*
 287          *because when link with ap, mac80211 will ask us
 288          *to disable nic quickly after scan before linking,
 289          *this will cause link failed, so we delay 100ms here
 290          */
 291         queue_delayed_work(rtlpriv->works.rtl_wq,
 292                            &rtlpriv->works.ips_nic_off_wq, MSECS(100));
 293 }
 294
 295 /* NOTICE: any opmode should exc nic_on, or disable without
 296  * nic_on may something wrong, like adhoc TP*/
 297 void rtl_ips_nic_on(struct ieee80211_hw *hw)
 298 {
 299         struct rtl_priv *rtlpriv = rtl_priv(hw);
 300         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 301         enum rf_pwrstate rtstate;
 302
 303         cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
 304
 305         spin_lock(&rtlpriv->locks.ips_lock);
 306         if (ppsc->b_inactiveps) {
 307                 rtstate = ppsc->rfpwr_state;
 308
 309                 if (rtstate != ERFON &&
 310                     !ppsc->b_swrf_processing &&
 311                     ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
 312
 313                         ppsc->inactive_pwrstate = ERFON;
 314                         ppsc->b_in_powersavemode = false;
 315                         _rtl_ps_inactive_ps(hw);
 316                 }
 317         }
 318         spin_unlock(&rtlpriv->locks.ips_lock);
 319 }
 320
 321 /*for FW LPS*/
 322
 323 /*
 324  *Determine if we can set Fw into PS mode
 325  *in current condition.Return true if it
 326  *can enter PS mode.
 327  */
 328 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
 329 {
 330         struct rtl_priv *rtlpriv = rtl_priv(hw);
 331         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 332         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 333         u32 ps_timediff;
 334
 335         ps_timediff = jiffies_to_msecs(jiffies -
 336                                        ppsc->last_delaylps_stamp_jiffies);
 337
 338         if (ps_timediff < 2000) {
 339                 RT_TRACE(COMP_POWER, DBG_LOUD,
 340                          ("Delay enter Fw LPS for DHCP, ARP,"
 341                           " or EAPOL exchanging state.\n"));
 342                 return false;
 343         }
 344
 345         if (mac->link_state != MAC80211_LINKED)
 346                 return false;
 347
 348         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 349                 return false;
 350
 351         return true;
 352 }
 353
 354 /* Change current and default preamble mode.*/
 355 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 356 {
 357         struct rtl_priv *rtlpriv = rtl_priv(hw);
 358         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 359         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 360         bool enter_fwlps;
 361
 362         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 363                 return;
 364
 365         if (mac->link_state != MAC80211_LINKED)
 366                 return;
 367
 368         if (ppsc->dot11_psmode == rt_psmode)
 369                 return;
 370
 371         /* Update power save mode configured. */
 372         ppsc->dot11_psmode = rt_psmode;
 373
 374         /*
 375          *<FW control LPS>
 376          *1. Enter PS mode
 377          *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
 378          *   cmd to set Fw into PS mode.
 379          *2. Leave PS mode
 380          *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
 381          *   mode and set RPWM to turn RF on.
 382          */
 383
 384         if ((ppsc->b_fwctrl_lps) && ppsc->report_linked) {
 385                 if (ppsc->dot11_psmode == EACTIVE) {
 386                         RT_TRACE(COMP_RF, DBG_DMESG,
 387                                  ("FW LPS leave ps_mode:%x\n",
 388                                   FW_PS_ACTIVE_MODE));
 389                         enter_fwlps = false;
 390                         ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
 391                         ppsc->smart_ps = 0;
 392                         rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
 393                                                       (u8 *)(&enter_fwlps));
 394                         if (ppsc->p2p_ps_info.opp_ps)
 395                                 rtl_p2p_ps_cmd(hw,P2P_PS_ENABLE);
 396
 397                 } else {
 398                         if (rtl_get_fwlps_doze(hw)) {
 399                                 RT_TRACE(COMP_RF, DBG_DMESG,
 400                                          ("FW LPS enter ps_mode:%x\n",
 401                                          ppsc->fwctrl_psmode));
 402                                 enter_fwlps = true;
 403                                 ppsc->pwr_mode = ppsc->fwctrl_psmode;
 404                                 ppsc->smart_ps = 2;
 405                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 406                                                         HW_VAR_FW_LPS_ACTION,
 407                                                         (u8 *)(&enter_fwlps));
 408
 409                         } else {
 410                                 /* Reset the power save related parameters. */
 411                                 ppsc->dot11_psmode = EACTIVE;
 412                         }
 413                 }
 414         }
 415 }
 416
 417 /*Enter the leisure power save mode.*/
 418 void rtl_lps_enter(struct ieee80211_hw *hw)
 419 {
 420         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 421         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 422         struct rtl_priv *rtlpriv = rtl_priv(hw);
 423         unsigned long flag;
 424
 425         if (!ppsc->b_fwctrl_lps)
 426                 return;
 427
 428         if (rtlpriv->sec.being_setkey)
 429                 return;
 430
 431         if (rtlpriv->link_info.b_busytraffic)
 432                 return;
 433
 434         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 435         if (mac->cnt_after_linked < 5)
 436                 return;
 437
 438         if (mac->opmode == NL80211_IFTYPE_ADHOC)
 439                 return;
 440
 441         if (mac->link_state != MAC80211_LINKED)
 442                 return;
 443
 444         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 445
 446         /* Idle for a while if we connect to AP a while ago. */
 447         if (mac->cnt_after_linked >= 2) {
 448                 if (ppsc->dot11_psmode == EACTIVE) {
 449                         RT_TRACE(COMP_POWER, DBG_LOUD,
 450                                  ("Enter 802.11 power save mode...\n"));
 451
 452                         rtl_lps_set_psmode(hw, EAUTOPS);
 453                 }
 454         }
 455
 456         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 457 }
 458
 459 /*Leave the leisure power save mode.*/
 460 void rtl_lps_leave(struct ieee80211_hw *hw)
 461 {
 462         struct rtl_priv *rtlpriv = rtl_priv(hw);
 463         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 464         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 465         unsigned long flag;
 466
 467         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 468
 469         if (ppsc->b_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(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_irqrestore(&rtlpriv->locks.lps_lock, flag);
 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.b_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.b_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 (ether_addr_equal(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 /*<delete in kernel start>*/
 546 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 547 /*<delete in kernel end>*/
 548         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 549                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 550 /*<delete in kernel start>*/
 551 #else
 552         if (!WARN_ON_ONCE(!mac->vif->bss_conf.dtim_period))
 553                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 554 #endif
 555 /*<delete in kernel end>*/
 556
 557         /* Check whenever the PHY can be turned off again. */
 558
 559         /* 1. What about buffered unicast traffic for our AID? */
 560         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 561                                        rtlpriv->mac80211.assoc_id);
 562
 563         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 564         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 565         rtlpriv->psc.multi_buffered = m_buffed;
 566
 567         /* unicast will process by mac80211 through
 568          * set ~IEEE80211_CONF_PS, So we just check
 569          * multicast frames here */
 570         if (!m_buffed ) {//&&) {// !rtlpriv->psc.tx_doing) {
 571                 /* back to low-power land. and delay is
 572                  * prevent null power save frame tx fail */
 573                 queue_delayed_work(rtlpriv->works.rtl_wq,
 574                                    &rtlpriv->works.ps_work, MSECS(5));
 575         } else {
 576                 RT_TRACE(COMP_POWER, DBG_DMESG,
 577                          ("u_bufferd: %x, m_buffered: %x\n",
 578                           u_buffed, m_buffed));
 579         }
 580 }
 581
 582 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 583 {
 584         struct rtl_priv *rtlpriv = rtl_priv(hw);
 585         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 586         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 587         unsigned long flag;
 588
 589         if (!rtlpriv->psc.b_swctrl_lps)
 590                 return;
 591         if (mac->link_state != MAC80211_LINKED)
 592                 return;
 593
 594         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 595             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 596                 rtlpriv->intf_ops->disable_aspm(hw);
 597                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 598         }
 599
 600         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 601         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
 602         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 603 }
 604
 605 void rtl_swlps_rfon_wq_callback(void *data)
 606 {
 607         struct rtl_works *rtlworks =
 608             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 609         struct ieee80211_hw *hw = rtlworks->hw;
 610
 611         rtl_swlps_rf_awake(hw);
 612 }
 613
 614 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 615 {
 616         struct rtl_priv *rtlpriv = rtl_priv(hw);
 617         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 618         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 619         unsigned long flag;
 620         u8 sleep_intv;
 621
 622         if (!rtlpriv->psc.sw_ps_enabled)
 623                 return;
 624
 625         if ((rtlpriv->sec.being_setkey) ||
 626             (mac->opmode == NL80211_IFTYPE_ADHOC))
 627                 return;
 628
 629         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 630         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 631                 return;
 632
 633         if (rtlpriv->link_info.b_busytraffic)
 634                 return;
 635
 636         spin_lock(&rtlpriv->locks.rf_ps_lock);
 637         if (rtlpriv->psc.rfchange_inprogress) {
 638                 spin_unlock(&rtlpriv->locks.rf_ps_lock);
 639                 return;
 640         }
 641         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 642
 643         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 644         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS,false);
 645         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 646
 647         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 648             !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 649                 rtlpriv->intf_ops->enable_aspm(hw);
 650                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 651         }
 652
 653         /* here is power save alg, when this beacon is DTIM
 654          * we will set sleep time to dtim_period * n;
 655          * when this beacon is not DTIM, we will set sleep
 656          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 657          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 658
 659 /*<delete in kernel start>*/
 660 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 661 /*<delete in kernel end>*/
 662         if (rtlpriv->psc.dtim_counter == 0) {
 663                 if (hw->conf.ps_dtim_period == 1)
 664                         sleep_intv = hw->conf.ps_dtim_period * 2;
 665                 else
 666                         sleep_intv = hw->conf.ps_dtim_period;
 667         } else {
 668                 sleep_intv = rtlpriv->psc.dtim_counter;
 669         }
 670 /*<delete in kernel start>*/
 671 #else
 672         if (rtlpriv->psc.dtim_counter == 0) {
 673                 if (mac->vif->bss_conf.dtim_period == 1)
 674                         sleep_intv = mac->vif->bss_conf.dtim_period * 2;
 675                 else
 676                         sleep_intv = mac->vif->bss_conf.dtim_period;
 677         } else {
 678                 sleep_intv = rtlpriv->psc.dtim_counter;
 679         }
 680 #endif
 681 /*<delete in kernel end>*/
 682
 683         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 684                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 685
 686         /* this print should always be dtim_conter = 0 &
 687          * sleep  = dtim_period, that meaons, we should
 688          * awake before every dtim */
 689         RT_TRACE(COMP_POWER, DBG_DMESG,
 690                  ("dtim_counter:%x will sleep :%d beacon_intv\n",
 691                   rtlpriv->psc.dtim_counter, sleep_intv));
 692
 693         /* we tested that 40ms is enough for sw & hw sw delay */
 694         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 695                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 696 }
 697
 698
 699 void rtl_swlps_wq_callback(void *data)
 700 {
 701         struct rtl_works *rtlworks =
 702                 container_of_dwork_rtl(data, struct rtl_works, ps_work);
 703         struct ieee80211_hw *hw = rtlworks->hw;
 704         struct rtl_priv *rtlpriv = rtl_priv(hw);
 705         bool ps = false;
 706
 707         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 708
 709         /* we can sleep after ps null send ok */
 710         if (rtlpriv->psc.state_inap) {
 711                 rtl_swlps_rf_sleep(hw);
 712
 713                 if (rtlpriv->psc.state && !ps) {
 714                         rtlpriv->psc.sleep_ms =
 715                                 jiffies_to_msecs(jiffies -
 716                                                  rtlpriv->psc.last_action);
 717                 }
 718
 719                 if (ps)
 720                         rtlpriv->psc.last_slept = jiffies;
 721
 722                 rtlpriv->psc.last_action = jiffies;
 723                 rtlpriv->psc.state = ps;
 724         }
 725 }
 726
 727
 728 void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data, unsigned int len)
 729 {
 730         struct rtl_priv *rtlpriv = rtl_priv(hw);
 731         struct ieee80211_mgmt *mgmt = (void *)data;
 732         struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 733         u8 *pos, *end, *ie;
 734         u16 noa_len;
 735         static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
 736         u8 noa_num, index,i, noa_index = 0;
 737         bool find_p2p_ie = false , find_p2p_ps_ie = false;
 738         pos = (u8 *)mgmt->u.beacon.variable;
 739         end = data + len;
 740         ie = NULL;
 741
 742         while (pos + 1 < end) {
 743
 744                 if (pos + 2 + pos[1] > end)
 745                         return;
 746
 747                 if (pos[0] == 221 && pos[1] > 4) {
 748                         if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
 749                                 ie = pos + 2+4;
 750                                 break;
 751                         }
 752                 }
 753                 pos += 2 + pos[1];
 754         }
 755
 756         if (ie == NULL)
 757                 return;
 758         find_p2p_ie = true;
 759         /*to find noa ie*/
 760         while (ie + 1 < end) {
 761                 noa_len = READEF2BYTE(&ie[1]);
 762                 if (ie + 3 + ie[1] > end)
 763                         return;
 764
 765                 if (ie[0] == 12) {
 766                         find_p2p_ps_ie = true;
 767                         if ( (noa_len - 2) % 13 != 0){
 768                                 RT_TRACE(COMP_INIT, DBG_LOUD,
 769                                          ("P2P notice of absence: "
 770                                           "invalid length.%d\n",noa_len));
 771                                 return;
 772                         } else {
 773                                 noa_num = (noa_len - 2) / 13;
 774                         }
 775                         noa_index = ie[3];
 776                         if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == P2P_PS_NONE
 777                             || noa_index != p2pinfo->noa_index) {
 778                                 RT_TRACE(COMP_FW, DBG_LOUD,
 779                                          ("update NOA ie.\n"));
 780                                 p2pinfo->noa_index = noa_index;
 781                                 p2pinfo->opp_ps= (ie[4] >> 7);
 782                                 p2pinfo->ctwindow = ie[4] & 0x7F;
 783                                 p2pinfo->noa_num = noa_num;
 784                                 index = 5;
 785                                 for (i = 0; i< noa_num; i++){
 786                                         p2pinfo->noa_count_type[i] =
 787                                                         READEF1BYTE(ie+index);
 788                                         index += 1;
 789                                         p2pinfo->noa_duration[i] =
 790                                                         READEF4BYTE(ie+index);
 791                                         index += 4;
 792                                         p2pinfo->noa_interval[i] =
 793                                                         READEF4BYTE(ie+index);
 794                                         index += 4;
 795                                         p2pinfo->noa_start_time[i] =
 796                                                         READEF4BYTE(ie+index);
 797                                         index += 4;
 798                                 }
 799
 800                                 if (p2pinfo->opp_ps == 1) {
 801                                         p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
 802                                         /* Driver should wait LPS
 803                                          * entering CTWindow*/
 804                                         if (rtlpriv->psc.b_fw_current_inpsmode){
 805                                                 rtl_p2p_ps_cmd(hw,
 806                                                                P2P_PS_ENABLE);
 807                                         }
 808                                 } else if (p2pinfo->noa_num > 0) {
 809                                         p2pinfo->p2p_ps_mode = P2P_PS_NOA;
 810                                         rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
 811                                 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 812                                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 813                                 }
 814                         }
 815
 816                 break;
 817                 }
 818                 ie += 3 + noa_len;
 819         }
 820
 821         if (find_p2p_ie == true) {
 822                 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
 823                     (find_p2p_ps_ie == false))
 824                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 825         }
 826 }
 827
 828 void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data, unsigned int len)
 829 {
 830         struct rtl_priv *rtlpriv = rtl_priv(hw);
 831         struct ieee80211_mgmt *mgmt = (void *)data;
 832         struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 833         bool find_p2p_ie = false , find_p2p_ps_ie = false;
 834         u8 noa_num, index,i, noa_index = 0;
 835         u8 *pos, *end, *ie;
 836         u16 noa_len;
 837         static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
 838
 839         pos = (u8 *) &mgmt->u.action.category;
 840         end = data + len;
 841         ie = NULL;
 842
 843         if (pos[0] == 0x7f ) {
 844                 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0) {
 845                         ie = pos + 3+4;
 846                 }
 847         }
 848
 849         if (ie == NULL)
 850                 return;
 851         find_p2p_ie = true;
 852
 853         RT_TRACE(COMP_FW, DBG_LOUD, ("action frame find P2P IE.\n"));
 854         /*to find noa ie*/
 855         while (ie + 1 < end) {
 856                 noa_len = READEF2BYTE(&ie[1]);
 857                 if (ie + 3 + ie[1] > end)
 858                         return;
 859
 860                 if (ie[0] == 12) {
 861                         RT_TRACE(COMP_FW, DBG_LOUD, ("find NOA IE.\n"));
 862                         RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, ("noa ie "),
 863                                       ie, noa_len);
 864                         find_p2p_ps_ie = true;
 865                         if ( (noa_len - 2) % 13 != 0){
 866                                 RT_TRACE(COMP_FW, DBG_LOUD,
 867                                          ("P2P notice of absence: "
 868                                           "invalid length.%d\n",noa_len));
 869                                 return;
 870                         } else {
 871                                 noa_num = (noa_len - 2) / 13;
 872                         }
 873                         noa_index = ie[3];
 874                         if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == P2P_PS_NONE
 875                             || noa_index != p2pinfo->noa_index) {
 876                                 p2pinfo->noa_index = noa_index;
 877                                 p2pinfo->opp_ps= (ie[4] >> 7);
 878                                 p2pinfo->ctwindow = ie[4] & 0x7F;
 879                                 p2pinfo->noa_num = noa_num;
 880                                 index = 5;
 881                                 for (i = 0; i< noa_num; i++){
 882                                         p2pinfo->noa_count_type[i] =
 883                                                         READEF1BYTE(ie+index);
 884                                         index += 1;
 885                                         p2pinfo->noa_duration[i] =
 886                                                         READEF4BYTE(ie+index);
 887                                         index += 4;
 888                                         p2pinfo->noa_interval[i] =
 889                                                         READEF4BYTE(ie+index);
 890                                         index += 4;
 891                                         p2pinfo->noa_start_time[i] =
 892                                                         READEF4BYTE(ie+index);
 893                                         index += 4;
 894                                 }
 895
 896                                 if (p2pinfo->opp_ps == 1) {
 897                                         p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
 898                                         /* Driver should wait LPS
 899                                          * entering CTWindow */
 900                                         if (rtlpriv->psc.b_fw_current_inpsmode){
 901                                                 rtl_p2p_ps_cmd(hw,
 902                                                                P2P_PS_ENABLE);
 903                                         }
 904                                 } else if (p2pinfo->noa_num > 0) {
 905                                         p2pinfo->p2p_ps_mode = P2P_PS_NOA;
 906                                         rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
 907                                 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 908                                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 909                                 }
 910                         }
 911
 912                 break;
 913                 }
 914                 ie += 3 + noa_len;
 915         }
 916
 917
 918 }
 919
 920
 921 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw,u8 p2p_ps_state)
 922 {
 923         struct rtl_priv *rtlpriv = rtl_priv(hw);
 924         struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
 925         struct rtl_p2p_ps_info  *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 926
 927         RT_TRACE(COMP_FW, DBG_LOUD, (" p2p state %x\n",p2p_ps_state));
 928         switch (p2p_ps_state) {
 929                 case P2P_PS_DISABLE:
 930                         p2pinfo->p2p_ps_state = p2p_ps_state;
 931                         rtlpriv->cfg->ops->set_hw_reg(hw,
 932                                                    HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 933                                                    (u8 *)(&p2p_ps_state));
 934
 935                         p2pinfo->noa_index = 0;
 936                         p2pinfo->ctwindow = 0;
 937                         p2pinfo->opp_ps = 0;
 938                         p2pinfo->noa_num = 0;
 939                         p2pinfo->p2p_ps_mode = P2P_PS_NONE;
 940                         if (rtlps->b_fw_current_inpsmode == true) {
 941                                 if (rtlps->smart_ps == 0) {
 942                                         rtlps->smart_ps = 2;
 943                                         rtlpriv->cfg->ops->set_hw_reg(hw,
 944                                                     HW_VAR_H2C_FW_PWRMODE,
 945                                                     (u8 *)(&rtlps->pwr_mode));
 946                                 }
 947
 948                         }
 949                         break;
 950                 case P2P_PS_ENABLE:
 951                         if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 952                                 p2pinfo->p2p_ps_state = p2p_ps_state;
 953
 954                                 if (p2pinfo->ctwindow > 0) {
 955                                         if (rtlps->smart_ps != 0){
 956                                                 rtlps->smart_ps = 0;
 957                                                 rtlpriv->cfg->ops->set_hw_reg(
 958                                                     hw, HW_VAR_H2C_FW_PWRMODE,
 959                                                     (u8 *)(&rtlps->pwr_mode));
 960                                         }
 961                                 }
 962                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 963                                                 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 964                                                 (u8 *)(&p2p_ps_state));
 965
 966                         }
 967                         break;
 968                 case P2P_PS_SCAN:
 969                 case P2P_PS_SCAN_DONE:
 970                 case P2P_PS_ALLSTASLEEP:
 971                         if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 972                                 p2pinfo->p2p_ps_state = p2p_ps_state;
 973                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 974                                                 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 975                                                 (u8 *)(&p2p_ps_state));
 976                         }
 977                         break;
 978                 default:
 979                         break;
 980
 981         }
 982         RT_TRACE(COMP_FW, DBG_LOUD, (" ctwindow %x oppps %x \n",
 983                                      p2pinfo->ctwindow,p2pinfo->opp_ps));
 984         RT_TRACE(COMP_FW, DBG_LOUD, ("count %x duration %x index %x interval %x"
 985                                      " start time %x noa num %x\n",
 986                                      p2pinfo->noa_count_type[0],
 987                                      p2pinfo->noa_duration[0],
 988                                      p2pinfo->noa_index,
 989                                      p2pinfo->noa_interval[0],
 990                                      p2pinfo->noa_start_time[0],
 991                                      p2pinfo->noa_num));
 992         RT_TRACE(COMP_FW, DBG_LOUD, ("end\n"));
 993 }
 994
 995 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
 996 {
 997         struct rtl_priv *rtlpriv = rtl_priv(hw);
 998         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 999         struct ieee80211_hdr *hdr = (void *) data;
1000
1001         if (!mac->p2p)
1002                 return;
1003         if (mac->link_state != MAC80211_LINKED)
1004                 return;
1005         /* min. beacon length + FCS_LEN */
1006         if (len <= 40 + FCS_LEN)
1007                 return;
1008
1009         /* and only beacons from the associated BSSID, please */
1010         if (ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
1011                 return;
1012
1013         /* check if this really is a beacon */
1014         if (!(ieee80211_is_beacon(hdr->frame_control) ||
1015               ieee80211_is_probe_resp(hdr->frame_control) ||
1016               ieee80211_is_action(hdr->frame_control)))
1017                 return;
1018
1019         if (ieee80211_is_action(hdr->frame_control)) {
1020                 rtl_p2p_action_ie(hw,data,len - FCS_LEN);
1021         } else {
1022                 rtl_p2p_noa_ie(hw,data,len - FCS_LEN);
1023         }
1024
1025 }