drivers/staging/otus/80211core/cpsmgr.c

   1 /*
   2  * Copyright (c) 2007-2008 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 /**
  18   *  The power saving manager is to save the power as much as possible.
  19   *  Generally speaking, it controls:
  20   *
  21   *         - when to sleep
  22   *         -
  23   *
  24   */
  25 #include "cprecomp.h"
  26
  27 void zfPowerSavingMgrInit(zdev_t* dev)
  28 {
  29     zmw_get_wlan_dev(dev);
  30
  31     wd->sta.powerSaveMode = ZM_STA_PS_NONE;
  32     wd->sta.psMgr.state = ZM_PS_MSG_STATE_ACTIVE;
  33     wd->sta.psMgr.isSleepAllowed = 0;
  34     wd->sta.psMgr.maxSleepPeriods = 1;
  35     wd->sta.psMgr.ticks = 0;
  36     wd->sta.psMgr.sleepAllowedtick = 0;
  37 }
  38
  39 static u16_t zfPowerSavingMgrHandlePsNone(zdev_t* dev, u8_t *isWakeUpRequired)
  40 {
  41     u16_t ret = 0;
  42     zmw_get_wlan_dev(dev);
  43
  44     switch(wd->sta.psMgr.state)
  45     {
  46         case ZM_PS_MSG_STATE_ACTIVE:
  47             *isWakeUpRequired = 0;
  48             break;
  49
  50         case ZM_PS_MSG_STATE_T1:
  51         case ZM_PS_MSG_STATE_T2:
  52         case ZM_PS_MSG_STATE_SLEEP:
  53         default:
  54             *isWakeUpRequired = 1;
  55 zm_debug_msg0("zfPowerSavingMgrHandlePsNone: Wake up now\n");
  56             if ( zfStaIsConnected(dev) )
  57             {
  58                 zm_debug_msg0("zfPowerSavingMgrOnHandleT1 send Null data\n");
  59                 //zfSendNullData(dev, 0);
  60                 ret = 1;
  61             }
  62
  63             wd->sta.psMgr.state = ZM_PS_MSG_STATE_ACTIVE;
  64             break;
  65     }
  66     return ret;
  67 }
  68
  69 static void zfPowerSavingMgrHandlePs(zdev_t* dev)
  70 {
  71     zmw_get_wlan_dev(dev);
  72
  73     switch(wd->sta.psMgr.state)
  74     {
  75         case ZM_PS_MSG_STATE_ACTIVE:
  76             //zm_debug_msg0("zfPowerSavingMgrHandlePs: Prepare to sleep...\n");
  77             //wd->sta.psMgr.state = ZM_PS_MSG_STATE_T1;
  78             break;
  79
  80         case ZM_PS_MSG_STATE_T1:
  81         case ZM_PS_MSG_STATE_T2:
  82         case ZM_PS_MSG_STATE_SLEEP:
  83         default:
  84             break;
  85     }
  86 }
  87
  88 void zfPowerSavingMgrSetMode(zdev_t* dev, u8_t mode)
  89 {
  90     u16_t sendNull = 0;
  91     u8_t isWakeUpRequired = 0;
  92
  93     zmw_get_wlan_dev(dev);
  94     zmw_declare_for_critical_section();
  95
  96     zm_debug_msg1("mode = ", mode);
  97
  98     if (mode > ZM_STA_PS_LIGHT)
  99     {
 100         zm_debug_msg0("return - wrong power save mode");
 101         return;
 102     }
 103
 104     zmw_enter_critical_section(dev);
 105
 106     #if 1
 107     switch(mode)
 108     {
 109         case ZM_STA_PS_NONE:
 110             sendNull = zfPowerSavingMgrHandlePsNone(dev, &isWakeUpRequired);
 111             break;
 112
 113         case ZM_STA_PS_FAST:
 114         case ZM_STA_PS_LIGHT:
 115             wd->sta.psMgr.maxSleepPeriods = 1;
 116             zfPowerSavingMgrHandlePs(dev);
 117             break;
 118
 119         case ZM_STA_PS_MAX:
 120             wd->sta.psMgr.maxSleepPeriods = ZM_PS_MAX_SLEEP_PERIODS;
 121             zfPowerSavingMgrHandlePs(dev);
 122             break;
 123     }
 124     #else
 125     switch(wd->sta.psMgr.state)
 126     {
 127         case ZM_PS_MSG_STATE_ACTIVE:
 128             if ( mode != ZM_STA_PS_NONE )
 129             {
 130 zm_debug_msg0("zfPowerSavingMgrSetMode: switch from ZM_PS_MSG_STATE_ACTIVE to ZM_PS_MSG_STATE_T1\n");
 131                 // Stall the TX & start to wait the pending TX to be completed
 132                 wd->sta.psMgr.state = ZM_PS_MSG_STATE_T1;
 133             }
 134             break;
 135
 136         case ZM_PS_MSG_STATE_SLEEP:
 137             break;
 138     }
 139     #endif
 140
 141     wd->sta.powerSaveMode = mode;
 142     zmw_leave_critical_section(dev);
 143
 144     if ( isWakeUpRequired )
 145     {
 146         zfHpPowerSaveSetState(dev, 0);
 147         wd->sta.psMgr.tempWakeUp = 0;
 148     }
 149
 150     if ( zfStaIsConnected(dev)
 151          && (wd->wlanMode == ZM_MODE_INFRASTRUCTURE) )
 152     {
 153         switch(mode)
 154         {
 155             case ZM_STA_PS_NONE:
 156                 zfHpPowerSaveSetMode(dev, 0, 0, wd->beaconInterval);
 157                 break;
 158
 159             case ZM_STA_PS_FAST:
 160             case ZM_STA_PS_MAX:
 161             case ZM_STA_PS_LIGHT:
 162                 zfHpPowerSaveSetMode(dev, 0, 1, wd->beaconInterval);
 163                 break;
 164
 165             default:
 166                 zfHpPowerSaveSetMode(dev, 0, 0, wd->beaconInterval);
 167                 break;
 168         }
 169     }
 170
 171     if (sendNull == 1)
 172     {
 173         zfSendNullData(dev, 0);
 174     }
 175
 176     return;
 177 }
 178
 179 static void zfPowerSavingMgrNotifyPSToAP(zdev_t *dev)
 180 {
 181     zmw_get_wlan_dev(dev);
 182     zmw_declare_for_critical_section();
 183
 184     if ( (wd->sta.psMgr.tempWakeUp != 1)&&
 185          (wd->sta.psMgr.lastTxUnicastFrm != wd->commTally.txUnicastFrm ||
 186           wd->sta.psMgr.lastTxBroadcastFrm != wd->commTally.txBroadcastFrm ||
 187           wd->sta.psMgr.lastTxMulticastFrm != wd->commTally.txMulticastFrm) )
 188     {
 189         zmw_enter_critical_section(dev);
 190         wd->sta.psMgr.lastTxUnicastFrm = wd->commTally.txUnicastFrm;
 191         wd->sta.psMgr.lastTxBroadcastFrm = wd->commTally.txBroadcastFrm;
 192         wd->sta.psMgr.lastTxMulticastFrm = wd->commTally.txMulticastFrm;
 193         zmw_leave_critical_section(dev);
 194
 195         zfSendNullData(dev, 1);
 196     }
 197 }
 198
 199 static void zfPowerSavingMgrOnHandleT1(zdev_t* dev)
 200 {
 201     zmw_get_wlan_dev(dev);
 202     zmw_declare_for_critical_section();
 203
 204     // If the tx Q is not empty...return
 205     if ( zfIsVtxqEmpty(dev) == FALSE )
 206     {
 207         return;
 208     }
 209
 210 zm_debug_msg0("VtxQ is empty now...Check if HAL TXQ is empty\n");
 211
 212     // The the HAL TX Q is not empty...return
 213     if ( zfHpGetFreeTxdCount(dev) != zfHpGetMaxTxdCount(dev) )
 214     {
 215         return;
 216     }
 217
 218 zm_debug_msg0("HAL TXQ is empty now...Could go to sleep...\n");
 219
 220     zmw_enter_critical_section(dev);
 221
 222     if (wd->sta.powerSaveMode == ZM_STA_PS_LIGHT)
 223     {
 224         if (wd->sta.ReceivedPktRatePerSecond > 200)
 225         {
 226             zmw_leave_critical_section(dev);
 227             return;
 228         }
 229
 230         if ( zfStaIsConnected(dev)
 231              && (wd->wlanMode == ZM_MODE_INFRASTRUCTURE) )
 232         {
 233             if (wd->sta.psMgr.sleepAllowedtick) {
 234                 wd->sta.psMgr.sleepAllowedtick--;
 235                 zmw_leave_critical_section(dev);
 236                 return;
 237             }
 238         }
 239     }
 240
 241     wd->sta.psMgr.state = ZM_PS_MSG_STATE_T2;
 242
 243     zmw_leave_critical_section(dev);
 244
 245     // Send the Null pkt to AP to notify that I'm going to sleep
 246     if ( zfStaIsConnected(dev) )
 247     {
 248 zm_debug_msg0("zfPowerSavingMgrOnHandleT1 send Null data\n");
 249         zfPowerSavingMgrNotifyPSToAP(dev);
 250     }
 251
 252     // Stall the TX now
 253     // zfTxEngineStop(dev);
 254 }
 255
 256 static void zfPowerSavingMgrOnHandleT2(zdev_t* dev)
 257 {
 258     zmw_get_wlan_dev(dev);
 259     zmw_declare_for_critical_section();
 260
 261     // Wait until the Null pkt is transmitted
 262     if ( zfHpGetFreeTxdCount(dev) != zfHpGetMaxTxdCount(dev) )
 263     {
 264         return;
 265     }
 266
 267     zmw_enter_critical_section(dev);
 268     wd->sta.psMgr.state = ZM_PS_MSG_STATE_SLEEP;
 269     wd->sta.psMgr.lastTxUnicastFrm = wd->commTally.txUnicastFrm;
 270     wd->sta.psMgr.lastTxBroadcastFrm = wd->commTally.txBroadcastFrm;
 271     wd->sta.psMgr.lastTxMulticastFrm = wd->commTally.txMulticastFrm;
 272     zmw_leave_critical_section(dev);
 273
 274     // Let CHIP sleep now
 275 zm_debug_msg0("zfPowerSavingMgrOnHandleT2 zzzz....\n");
 276     zfHpPowerSaveSetState(dev, 1);
 277     wd->sta.psMgr.tempWakeUp = 0;
 278 }
 279
 280 u8_t zfPowerSavingMgrIsSleeping(zdev_t *dev)
 281 {
 282     u8_t isSleeping = FALSE;
 283     zmw_get_wlan_dev(dev);
 284     zmw_declare_for_critical_section();
 285
 286     zmw_enter_critical_section(dev);
 287     if ( wd->sta.psMgr.state == ZM_PS_MSG_STATE_SLEEP ||
 288          wd->sta.psMgr.state == ZM_PS_MSG_STATE_T2)
 289     {
 290         isSleeping = TRUE;
 291     }
 292     zmw_leave_critical_section(dev);
 293     return isSleeping;
 294 }
 295
 296 static u8_t zfPowerSavingMgrIsIdle(zdev_t *dev)
 297 {
 298     u8_t isIdle = 0;
 299
 300     zmw_get_wlan_dev(dev);
 301     zmw_declare_for_critical_section();
 302
 303     zmw_enter_critical_section(dev);
 304
 305     if ( zfStaIsConnected(dev) && wd->sta.psMgr.isSleepAllowed == 0 )
 306     {
 307         goto done;
 308     }
 309
 310     if ( wd->sta.bChannelScan )
 311     {
 312         goto done;
 313     }
 314
 315     if ( zfStaIsConnecting(dev) )
 316     {
 317         goto done;
 318     }
 319
 320     if (wd->sta.powerSaveMode == ZM_STA_PS_LIGHT)
 321     {
 322         if (wd->sta.ReceivedPktRatePerSecond > 200)
 323         {
 324             goto done;
 325         }
 326
 327         if ( zfStaIsConnected(dev)
 328              && (wd->wlanMode == ZM_MODE_INFRASTRUCTURE) )
 329         {
 330             if (wd->sta.psMgr.sleepAllowedtick) {
 331                 wd->sta.psMgr.sleepAllowedtick--;
 332                 goto done;
 333             }
 334         }
 335     }
 336
 337     isIdle = 1;
 338
 339 done:
 340     zmw_leave_critical_section(dev);
 341
 342     if ( zfIsVtxqEmpty(dev) == FALSE )
 343     {
 344         isIdle = 0;
 345     }
 346
 347     return isIdle;
 348 }
 349
 350 static void zfPowerSavingMgrSleepIfIdle(zdev_t *dev)
 351 {
 352     u8_t isIdle;
 353
 354     zmw_get_wlan_dev(dev);
 355     zmw_declare_for_critical_section();
 356
 357     isIdle = zfPowerSavingMgrIsIdle(dev);
 358
 359     if ( isIdle == 0 )
 360     {
 361         return;
 362     }
 363
 364     zmw_enter_critical_section(dev);
 365
 366     switch(wd->sta.powerSaveMode)
 367     {
 368         case ZM_STA_PS_NONE:
 369             break;
 370
 371         case ZM_STA_PS_MAX:
 372         case ZM_STA_PS_FAST:
 373         case ZM_STA_PS_LIGHT:
 374             zm_debug_msg0("zfPowerSavingMgrSleepIfIdle: IDLE so slep now...\n");
 375             wd->sta.psMgr.state = ZM_PS_MSG_STATE_T1;
 376             break;
 377     }
 378
 379     zmw_leave_critical_section(dev);
 380 }
 381
 382 static void zfPowerSavingMgrDisconnectMain(zdev_t* dev)
 383 {
 384 #ifdef ZM_ENABLE_DISCONNECT_PS
 385     switch(wd->sta.psMgr.state)
 386     {
 387         case ZM_PS_MSG_STATE_ACTIVE:
 388             zfPowerSavingMgrSleepIfIdle(dev);
 389             break;
 390
 391         case ZM_PS_MSG_STATE_SLEEP:
 392             break;
 393
 394         case ZM_PS_MSG_STATE_T1:
 395             zfPowerSavingMgrOnHandleT1(dev);
 396             break;
 397
 398         case ZM_PS_MSG_STATE_T2:
 399             zfPowerSavingMgrOnHandleT2(dev);
 400             break;
 401     }
 402 #else
 403     zfPowerSavingMgrWakeup(dev);
 404 #endif
 405 }
 406
 407 static void zfPowerSavingMgrInfraMain(zdev_t* dev)
 408 {
 409     zmw_get_wlan_dev(dev);
 410
 411     switch(wd->sta.psMgr.state)
 412     {
 413         case ZM_PS_MSG_STATE_ACTIVE:
 414             zfPowerSavingMgrSleepIfIdle(dev);
 415             break;
 416
 417         case ZM_PS_MSG_STATE_SLEEP:
 418             break;
 419
 420         case ZM_PS_MSG_STATE_T1:
 421             zfPowerSavingMgrOnHandleT1(dev);
 422             break;
 423
 424         case ZM_PS_MSG_STATE_T2:
 425             zfPowerSavingMgrOnHandleT2(dev);
 426             break;
 427     }
 428 }
 429
 430 void zfPowerSavingMgrAtimWinExpired(zdev_t* dev)
 431 {
 432     zmw_get_wlan_dev(dev);
 433
 434 //printk("zfPowerSavingMgrAtimWinExpired #1\n");
 435     if ( wd->sta.powerSaveMode == ZM_STA_PS_NONE )
 436     {
 437         return;
 438     }
 439
 440 //printk("zfPowerSavingMgrAtimWinExpired #2\n");
 441     // if we received any ATIM window from the others to indicate we have buffered data
 442     // at the other station, we can't go to sleep
 443     if ( wd->sta.recvAtim )
 444     {
 445         wd->sta.recvAtim = 0;
 446         zm_debug_msg0("Can't sleep due to receving ATIM window!");
 447         return;
 448     }
 449
 450     // if we are the one to tx beacon during last beacon interval. we can't go to sleep
 451     // since we need to be alive to respond the probe request!
 452     if ( wd->sta.txBeaconInd )
 453     {
 454         zm_debug_msg0("Can't sleep due to just transmit a beacon!");
 455         return;
 456     }
 457
 458     // If we buffer any data for the other stations. we could not go to sleep
 459     if ( wd->sta.ibssPrevPSDataCount != 0 )
 460     {
 461         zm_debug_msg0("Can't sleep due to buffering data for the others!");
 462         return;
 463     }
 464
 465     // before sleeping, we still need to notify the others by transmitting null
 466     // pkt with power mgmt bit turned on.
 467     zfPowerSavingMgrOnHandleT1(dev);
 468 }
 469
 470 static void zfPowerSavingMgrIBSSMain(zdev_t* dev)
 471 {
 472     // wait for the end of
 473     // if need to wait to know if we are the one to transmit the beacon
 474     // during the beacon interval. If it's me, we can't go to sleep.
 475
 476     zmw_get_wlan_dev(dev);
 477
 478     switch(wd->sta.psMgr.state)
 479     {
 480         case ZM_PS_MSG_STATE_ACTIVE:
 481         case ZM_PS_MSG_STATE_SLEEP:
 482         case ZM_PS_MSG_STATE_T1:
 483             break;
 484
 485         case ZM_PS_MSG_STATE_T2:
 486             zfPowerSavingMgrOnHandleT2(dev);
 487             break;
 488     }
 489
 490     return;
 491 }
 492
 493 #if 1
 494 void zfPowerSavingMgrMain(zdev_t* dev)
 495 {
 496     zmw_get_wlan_dev(dev);
 497
 498     switch (wd->sta.adapterState)
 499     {
 500     case ZM_STA_STATE_DISCONNECT:
 501         zfPowerSavingMgrDisconnectMain(dev);
 502         break;
 503     case ZM_STA_STATE_CONNECTED:
 504         {
 505             if (wd->wlanMode == ZM_MODE_INFRASTRUCTURE) {
 506                 zfPowerSavingMgrInfraMain(dev);
 507             } else if (wd->wlanMode == ZM_MODE_IBSS) {
 508                 zfPowerSavingMgrIBSSMain(dev);
 509             }
 510         }
 511         break;
 512     case ZM_STA_STATE_CONNECTING:
 513     default:
 514         break;
 515     }
 516 }
 517 #else
 518 void zfPowerSavingMgrMain(zdev_t* dev)
 519 {
 520     zmw_get_wlan_dev(dev);
 521
 522     if ( wd->wlanMode != ZM_MODE_INFRASTRUCTURE )
 523     {
 524         return;
 525     }
 526
 527     switch(wd->sta.psMgr.state)
 528     {
 529         case ZM_PS_MSG_STATE_ACTIVE:
 530             goto check_sleep;
 531             break;
 532
 533         case ZM_PS_MSG_STATE_SLEEP:
 534             goto sleeping;
 535             break;
 536
 537         case ZM_PS_MSG_STATE_T1:
 538             zfPowerSavingMgrOnHandleT1(dev);
 539             break;
 540
 541         case ZM_PS_MSG_STATE_T2:
 542             zfPowerSavingMgrOnHandleT2(dev);
 543             break;
 544     }
 545
 546     return;
 547
 548 sleeping:
 549     return;
 550
 551 check_sleep:
 552     zfPowerSavingMgrSleepIfIdle(dev);
 553     return;
 554 }
 555 #endif
 556
 557 #ifdef ZM_ENABLE_POWER_SAVE
 558 void zfPowerSavingMgrWakeup(zdev_t* dev)
 559 {
 560     zmw_get_wlan_dev(dev);
 561     zmw_declare_for_critical_section();
 562
 563 //zm_debug_msg0("zfPowerSavingMgrWakeup");
 564
 565     //if ( wd->sta.psMgr.state != ZM_PS_MSG_STATE_ACTIVE && ( zfPowerSavingMgrIsIdle(dev) == 0 ))
 566     if ( wd->sta.psMgr.state != ZM_PS_MSG_STATE_ACTIVE )
 567     {
 568         zmw_enter_critical_section(dev);
 569
 570         wd->sta.psMgr.isSleepAllowed = 0;
 571         wd->sta.psMgr.state = ZM_PS_MSG_STATE_ACTIVE;
 572
 573         if ( wd->sta.powerSaveMode > ZM_STA_PS_NONE )
 574             wd->sta.psMgr.tempWakeUp = 1;
 575
 576         zmw_leave_critical_section(dev);
 577
 578         // Wake up the CHIP now!!
 579         zfHpPowerSaveSetState(dev, 0);
 580     }
 581 }
 582 #else
 583 void zfPowerSavingMgrWakeup(zdev_t* dev)
 584 {
 585 }
 586 #endif
 587
 588 void zfPowerSavingMgrProcessBeacon(zdev_t* dev, zbuf_t* buf)
 589 {
 590     u8_t   length, bitmap;
 591     u16_t  offset, n1, n2, q, r;
 592     zbuf_t* psBuf;
 593
 594     zmw_get_wlan_dev(dev);
 595     zmw_declare_for_critical_section();
 596
 597     if ( wd->sta.powerSaveMode == ZM_STA_PS_NONE  )
 598     //if ( wd->sta.psMgr.state != ZM_PS_MSG_STATE_SLEEP )
 599     {
 600         return;
 601     }
 602
 603     wd->sta.psMgr.isSleepAllowed = 1;
 604
 605     offset = zfFindElement(dev, buf, ZM_WLAN_EID_TIM);
 606     if (offset != 0xffff)
 607     {
 608         length = zmw_rx_buf_readb(dev, buf, offset+1);
 609
 610         if ( length > 3 )
 611         {
 612             n1 = zmw_rx_buf_readb(dev, buf, offset+4) & (~ZM_BIT_0);
 613             n2 = length + n1 - 4;
 614             q = wd->sta.aid >> 3;
 615             r = wd->sta.aid & 7;
 616
 617             if ((q >= n1) && (q <= n2))
 618             {
 619                 bitmap = zmw_rx_buf_readb(dev, buf, offset+5+q-n1);
 620
 621                 if ( (bitmap >> r) &  ZM_BIT_0 )
 622                 {
 623                     //if ( wd->sta.powerSaveMode == ZM_STA_PS_FAST )
 624                     if ( 0 )
 625                     {
 626                         wd->sta.psMgr.state = ZM_PS_MSG_STATE_S1;
 627                         //zfSendPSPoll(dev);
 628                         zfSendNullData(dev, 0);
 629                     }
 630                     else
 631                     {
 632                         if ((wd->sta.qosInfo&0xf) != 0xf)
 633                         {
 634                             /* send ps-poll */
 635                             //printk("zfSendPSPoll #1\n");
 636
 637                             wd->sta.psMgr.isSleepAllowed = 0;
 638
 639                             switch (wd->sta.powerSaveMode)
 640                             {
 641                             case ZM_STA_PS_MAX:
 642                             case ZM_STA_PS_FAST:
 643                                 //zm_debug_msg0("wake up and send PS-Poll\n");
 644                                 zfSendPSPoll(dev);
 645                                 break;
 646                             case ZM_STA_PS_LIGHT:
 647                                 zm_debug_msg0("wake up and send null data\n");
 648
 649                                 zmw_enter_critical_section(dev);
 650                                 wd->sta.psMgr.sleepAllowedtick = 400;
 651                                 zmw_leave_critical_section(dev);
 652
 653                                 zfSendNullData(dev, 0);
 654                                 break;
 655                             }
 656
 657                             wd->sta.psMgr.tempWakeUp = 0;
 658                         }
 659                     }
 660                 }
 661             }
 662         }
 663     }
 664
 665     while ((psBuf = zfQueueGet(dev, wd->sta.uapsdQ)) != NULL)
 666     {
 667         zfTxSendEth(dev, psBuf, 0, ZM_EXTERNAL_ALLOC_BUF, 0);
 668     }
 669
 670     //printk("zfPowerSavingMgrProcessBeacon #1\n");
 671     zfPowerSavingMgrMain(dev);
 672 }
 673
 674 void zfPowerSavingMgrConnectNotify(zdev_t *dev)
 675 {
 676     zmw_get_wlan_dev(dev);
 677
 678     if ( wd->wlanMode == ZM_MODE_INFRASTRUCTURE )
 679     {
 680         switch(wd->sta.powerSaveMode)
 681         {
 682             case ZM_STA_PS_NONE:
 683                 zfHpPowerSaveSetMode(dev, 0, 0, wd->beaconInterval);
 684                 break;
 685
 686             case ZM_STA_PS_FAST:
 687             case ZM_STA_PS_MAX:
 688             case ZM_STA_PS_LIGHT:
 689                 zfHpPowerSaveSetMode(dev, 0, 1, wd->beaconInterval);
 690                 break;
 691
 692             default:
 693                 zfHpPowerSaveSetMode(dev, 0, 0, wd->beaconInterval);
 694                 break;
 695         }
 696     }
 697 }
 698
 699 void zfPowerSavingMgrPreTBTTInterrupt(zdev_t *dev)
 700 {
 701     zmw_get_wlan_dev(dev);
 702     zmw_declare_for_critical_section();
 703
 704     /* disable TBTT interrupt when change from connection to disconnect */
 705     if (zfStaIsDisconnect(dev)) {
 706         zfHpPowerSaveSetMode(dev, 0, 0, 0);
 707         zfPowerSavingMgrWakeup(dev);
 708         return;
 709     }
 710
 711     zmw_enter_critical_section(dev);
 712     wd->sta.psMgr.ticks++;
 713
 714     if ( wd->sta.psMgr.ticks < wd->sta.psMgr.maxSleepPeriods )
 715     {
 716         zmw_leave_critical_section(dev);
 717         return;
 718     }
 719     else
 720     {
 721         wd->sta.psMgr.ticks = 0;
 722     }
 723
 724     zmw_leave_critical_section(dev);
 725
 726     zfPowerSavingMgrWakeup(dev);
 727 }
 728
 729 /* Leave an empty line below to remove warning message on some compiler */
 730