summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/realtek/rtlwifi/ps.c
blob: b69321d45f043a8727f5e02341b1bc9cd91f4617 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
/******************************************************************************
 *
 * Copyright(c) 2009-2012  Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
 * Hsinchu 300, Taiwan.
 *
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 *****************************************************************************/

#include "wifi.h"
#include "base.h"
#include "ps.h"
#include <linux/export.h>
#include "btcoexist/rtl_btc.h"

bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));

	/*<1> reset trx ring */
	if (rtlhal->interface == INTF_PCI)
		rtlpriv->intf_ops->reset_trx_ring(hw);

	if (is_hal_stop(rtlhal))
		RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
			 "Driver is already down!\n");

	/*<2> Enable Adapter */
	if (rtlpriv->cfg->ops->hw_init(hw))
		return false;
	RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);

	/*<3> Enable Interrupt */
	rtlpriv->cfg->ops->enable_interrupt(hw);

	/*<enable timer> */
	rtl_watch_dog_timer_callback((unsigned long)hw);

	return true;
}
EXPORT_SYMBOL(rtl_ps_enable_nic);

bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	/*<1> Stop all timer */
	rtl_deinit_deferred_work(hw);

	/*<2> Disable Interrupt */
	rtlpriv->cfg->ops->disable_interrupt(hw);
	tasklet_kill(&rtlpriv->works.irq_tasklet);

	/*<3> Disable Adapter */
	rtlpriv->cfg->ops->hw_disable(hw);

	return true;
}
EXPORT_SYMBOL(rtl_ps_disable_nic);

bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
			 enum rf_pwrstate state_toset,
			 u32 changesource, bool protect_or_not)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	enum rf_pwrstate rtstate;
	bool actionallowed = false;
	u16 rfwait_cnt = 0;

	if (protect_or_not)
		goto no_protect;

	/*Only one thread can change
	 *the RF state at one time, and others
	 *should wait to be executed.
	 */
	while (true) {
		spin_lock(&rtlpriv->locks.rf_ps_lock);
		if (ppsc->rfchange_inprogress) {
			spin_unlock(&rtlpriv->locks.rf_ps_lock);

			RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
				 "RF Change in progress! Wait to set..state_toset(%d).\n",
				  state_toset);

			/* Set RF after the previous action is done.  */
			while (ppsc->rfchange_inprogress) {
				rfwait_cnt++;
				mdelay(1);
				/*Wait too long, return false to avoid
				 *to be stuck here.
				 */
				if (rfwait_cnt > 100)
					return false;
			}
		} else {
			ppsc->rfchange_inprogress = true;
			spin_unlock(&rtlpriv->locks.rf_ps_lock);
			break;
		}
	}

no_protect:
	rtstate = ppsc->rfpwr_state;

	switch (state_toset) {
	case ERFON:
		ppsc->rfoff_reason &= (~changesource);

		if ((changesource == RF_CHANGE_BY_HW) &&
		    (ppsc->hwradiooff)) {
			ppsc->hwradiooff = false;
		}

		if (!ppsc->rfoff_reason) {
			ppsc->rfoff_reason = 0;
			actionallowed = true;
		}

		break;

	case ERFOFF:

		if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
			ppsc->hwradiooff = true;
		}

		ppsc->rfoff_reason |= changesource;
		actionallowed = true;
		break;

	case ERFSLEEP:
		ppsc->rfoff_reason |= changesource;
		actionallowed = true;
		break;

	default:
		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
			 "switch case not processed\n");
		break;
	}

	if (actionallowed)
		rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);

	if (!protect_or_not) {
		spin_lock(&rtlpriv->locks.rf_ps_lock);
		ppsc->rfchange_inprogress = false;
		spin_unlock(&rtlpriv->locks.rf_ps_lock);
	}

	return actionallowed;
}
EXPORT_SYMBOL(rtl_ps_set_rf_state);

static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));

	ppsc->swrf_processing = true;

	if (ppsc->inactive_pwrstate == ERFON &&
	    rtlhal->interface == INTF_PCI) {
		if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
		    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
		    rtlhal->interface == INTF_PCI) {
			rtlpriv->intf_ops->disable_aspm(hw);
			RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
		}
	}

	rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
			    RF_CHANGE_BY_IPS, false);

	if (ppsc->inactive_pwrstate == ERFOFF &&
	    rtlhal->interface == INTF_PCI) {
		if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
		    !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
			rtlpriv->intf_ops->enable_aspm(hw);
			RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
		}
	}

	ppsc->swrf_processing = false;
}

void rtl_ips_nic_off_wq_callback(void *data)
{
	struct rtl_works *rtlworks =
	    container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
	struct ieee80211_hw *hw = rtlworks->hw;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	enum rf_pwrstate rtstate;

	if (mac->opmode != NL80211_IFTYPE_STATION) {
		RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
			 "not station return\n");
		return;
	}

	if (mac->p2p_in_use)
		return;

	if (mac->link_state > MAC80211_NOLINK)
		return;

	if (is_hal_stop(rtlhal))
		return;

	if (rtlpriv->sec.being_setkey)
		return;

	if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
		rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);

	if (ppsc->inactiveps) {
		rtstate = ppsc->rfpwr_state;

		/*
		 *Do not enter IPS in the following conditions:
		 *(1) RF is already OFF or Sleep
		 *(2) swrf_processing (indicates the IPS is still under going)
		 *(3) Connectted (only disconnected can trigger IPS)
		 *(4) IBSS (send Beacon)
		 *(5) AP mode (send Beacon)
		 *(6) monitor mode (rcv packet)
		 */

		if (rtstate == ERFON &&
		    !ppsc->swrf_processing &&
		    (mac->link_state == MAC80211_NOLINK) &&
		    !mac->act_scanning) {
			RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
				 "IPSEnter(): Turn off RF\n");

			ppsc->inactive_pwrstate = ERFOFF;
			ppsc->in_powersavemode = true;

			/* call before RF off */
			if (rtlpriv->cfg->ops->get_btc_status())
				rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
									ppsc->inactive_pwrstate);

			/*rtl_pci_reset_trx_ring(hw); */
			_rtl_ps_inactive_ps(hw);
		}
	}
}

void rtl_ips_nic_off(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	/* because when link with ap, mac80211 will ask us
	 * to disable nic quickly after scan before linking,
	 * this will cause link failed, so we delay 100ms here
	 */
	queue_delayed_work(rtlpriv->works.rtl_wq,
			   &rtlpriv->works.ips_nic_off_wq, MSECS(100));
}

/* NOTICE: any opmode should exc nic_on, or disable without
 * nic_on may something wrong, like adhoc TP
 */
void rtl_ips_nic_on(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	enum rf_pwrstate rtstate;

	cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);

	spin_lock(&rtlpriv->locks.ips_lock);
	if (ppsc->inactiveps) {
		rtstate = ppsc->rfpwr_state;

		if (rtstate != ERFON &&
		    !ppsc->swrf_processing &&
		    ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {

			ppsc->inactive_pwrstate = ERFON;
			ppsc->in_powersavemode = false;
			_rtl_ps_inactive_ps(hw);
			/* call after RF on */
			if (rtlpriv->cfg->ops->get_btc_status())
				rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
									ppsc->inactive_pwrstate);
		}
	}
	spin_unlock(&rtlpriv->locks.ips_lock);
}
EXPORT_SYMBOL_GPL(rtl_ips_nic_on);

/*for FW LPS*/

/*
 *Determine if we can set Fw into PS mode
 *in current condition.Return TRUE if it
 *can enter PS mode.
 */
static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	u32 ps_timediff;

	ps_timediff = jiffies_to_msecs(jiffies -
				       ppsc->last_delaylps_stamp_jiffies);

	if (ps_timediff < 2000) {
		RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
			 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
		return false;
	}

	if (mac->link_state != MAC80211_LINKED)
		return false;

	if (mac->opmode == NL80211_IFTYPE_ADHOC)
		return false;

	return true;
}

/* Change current and default preamble mode.*/
void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	bool enter_fwlps;

	if (mac->opmode == NL80211_IFTYPE_ADHOC)
		return;

	if (mac->link_state != MAC80211_LINKED)
		return;

	if (ppsc->dot11_psmode == rt_psmode)
		return;

	/* Update power save mode configured. */
	ppsc->dot11_psmode = rt_psmode;

	/*
	 *<FW control LPS>
	 *1. Enter PS mode
	 *   Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
	 *   cmd to set Fw into PS mode.
	 *2. Leave PS mode
	 *   Send H2C fw_pwrmode cmd to Fw to set Fw into Active
	 *   mode and set RPWM to turn RF on.
	 */

	if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
		if (ppsc->dot11_psmode == EACTIVE) {
			RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
				 "FW LPS leave ps_mode:%x\n",
				  FW_PS_ACTIVE_MODE);
			enter_fwlps = false;
			ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
			ppsc->smart_ps = 0;
			rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
						      (u8 *)(&enter_fwlps));
			if (ppsc->p2p_ps_info.opp_ps)
				rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);

			if (rtlpriv->cfg->ops->get_btc_status())
				rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
		} else {
			if (rtl_get_fwlps_doze(hw)) {
				RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
					 "FW LPS enter ps_mode:%x\n",
					 ppsc->fwctrl_psmode);
				if (rtlpriv->cfg->ops->get_btc_status())
					rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
				enter_fwlps = true;
				ppsc->pwr_mode = ppsc->fwctrl_psmode;
				ppsc->smart_ps = 2;
				rtlpriv->cfg->ops->set_hw_reg(hw,
							HW_VAR_FW_LPS_ACTION,
							(u8 *)(&enter_fwlps));

			} else {
				/* Reset the power save related parameters. */
				ppsc->dot11_psmode = EACTIVE;
			}
		}
	}
}

/*Enter the leisure power save mode.*/
void rtl_lps_enter(struct ieee80211_hw *hw)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	unsigned long flag;

	if (!ppsc->fwctrl_lps)
		return;

	if (rtlpriv->sec.being_setkey)
		return;

	if (rtlpriv->link_info.busytraffic)
		return;

	/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
	if (mac->cnt_after_linked < 5)
		return;

	if (mac->opmode == NL80211_IFTYPE_ADHOC)
		return;

	if (mac->link_state != MAC80211_LINKED)
		return;

	spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);

	/* Idle for a while if we connect to AP a while ago. */
	if (mac->cnt_after_linked >= 2) {
		if (ppsc->dot11_psmode == EACTIVE) {
			RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
				 "Enter 802.11 power save mode...\n");

			rtl_lps_set_psmode(hw, EAUTOPS);
		}
	}

	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}
EXPORT_SYMBOL(rtl_lps_enter);

/*Leave the leisure power save mode.*/
void rtl_lps_leave(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	unsigned long flag;

	spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);

	if (ppsc->fwctrl_lps) {
		if (ppsc->dot11_psmode != EACTIVE) {

			/*FIX ME */
			/*rtlpriv->cfg->ops->enable_interrupt(hw); */

			if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
			    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
			    rtlhal->interface == INTF_PCI) {
				rtlpriv->intf_ops->disable_aspm(hw);
				RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
			}

			RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
				 "Busy Traffic,Leave 802.11 power save..\n");

			rtl_lps_set_psmode(hw, EACTIVE);
		}
	}
	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}
EXPORT_SYMBOL(rtl_lps_leave);

/* For sw LPS*/
void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct ieee80211_hdr *hdr = data;
	struct ieee80211_tim_ie *tim_ie;
	u8 *tim;
	u8 tim_len;
	bool u_buffed;
	bool m_buffed;

	if (mac->opmode != NL80211_IFTYPE_STATION)
		return;

	if (!rtlpriv->psc.swctrl_lps)
		return;

	if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
		return;

	if (!rtlpriv->psc.sw_ps_enabled)
		return;

	if (rtlpriv->psc.fwctrl_lps)
		return;

	if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
		return;

	/* check if this really is a beacon */
	if (!ieee80211_is_beacon(hdr->frame_control))
		return;

	/* min. beacon length + FCS_LEN */
	if (len <= 40 + FCS_LEN)
		return;

	/* and only beacons from the associated BSSID, please */
	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
		return;

	rtlpriv->psc.last_beacon = jiffies;

	tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
	if (!tim)
		return;

	if (tim[1] < sizeof(*tim_ie))
		return;

	tim_len = tim[1];
	tim_ie = (struct ieee80211_tim_ie *) &tim[2];

	if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
		rtlpriv->psc.dtim_counter = tim_ie->dtim_count;

	/* Check whenever the PHY can be turned off again. */

	/* 1. What about buffered unicast traffic for our AID? */
	u_buffed = ieee80211_check_tim(tim_ie, tim_len,
				       rtlpriv->mac80211.assoc_id);

	/* 2. Maybe the AP wants to send multicast/broadcast data? */
	m_buffed = tim_ie->bitmap_ctrl & 0x01;
	rtlpriv->psc.multi_buffered = m_buffed;

	/* unicast will process by mac80211 through
	 * set ~IEEE80211_CONF_PS, So we just check
	 * multicast frames here */
	if (!m_buffed) {
		/* back to low-power land. and delay is
		 * prevent null power save frame tx fail */
		queue_delayed_work(rtlpriv->works.rtl_wq,
				   &rtlpriv->works.ps_work, MSECS(5));
	} else {
		RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
			 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
	}
}
EXPORT_SYMBOL_GPL(rtl_swlps_beacon);

void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	unsigned long flag;

	if (!rtlpriv->psc.swctrl_lps)
		return;
	if (mac->link_state != MAC80211_LINKED)
		return;

	if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
	    RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
		rtlpriv->intf_ops->disable_aspm(hw);
		RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
	}

	spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
	rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
}

void rtl_swlps_rfon_wq_callback(void *data)
{
	struct rtl_works *rtlworks =
	    container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
	struct ieee80211_hw *hw = rtlworks->hw;

	rtl_swlps_rf_awake(hw);
}

void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	unsigned long flag;
	u8 sleep_intv;

	if (!rtlpriv->psc.sw_ps_enabled)
		return;

	if ((rtlpriv->sec.being_setkey) ||
	    (mac->opmode == NL80211_IFTYPE_ADHOC))
		return;

	/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
	if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
		return;

	if (rtlpriv->link_info.busytraffic)
		return;

	spin_lock(&rtlpriv->locks.rf_ps_lock);
	if (rtlpriv->psc.rfchange_inprogress) {
		spin_unlock(&rtlpriv->locks.rf_ps_lock);
		return;
	}
	spin_unlock(&rtlpriv->locks.rf_ps_lock);

	spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
	rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS , false);
	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);

	if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
	    !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
		rtlpriv->intf_ops->enable_aspm(hw);
		RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
	}

	/* here is power save alg, when this beacon is DTIM
	 * we will set sleep time to dtim_period * n;
	 * when this beacon is not DTIM, we will set sleep
	 * time to sleep_intv = rtlpriv->psc.dtim_counter or
	 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */

	if (rtlpriv->psc.dtim_counter == 0) {
		if (hw->conf.ps_dtim_period == 1)
			sleep_intv = hw->conf.ps_dtim_period * 2;
		else
			sleep_intv = hw->conf.ps_dtim_period;
	} else {
		sleep_intv = rtlpriv->psc.dtim_counter;
	}

	if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
		sleep_intv = MAX_SW_LPS_SLEEP_INTV;

	/* this print should always be dtim_conter = 0 &
	 * sleep  = dtim_period, that meaons, we should
	 * awake before every dtim */
	RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
		 "dtim_counter:%x will sleep :%d beacon_intv\n",
		  rtlpriv->psc.dtim_counter, sleep_intv);

	/* we tested that 40ms is enough for sw & hw sw delay */
	queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
			MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
}

void rtl_lps_change_work_callback(struct work_struct *work)
{
	struct rtl_works *rtlworks =
	    container_of(work, struct rtl_works, lps_change_work);
	struct ieee80211_hw *hw = rtlworks->hw;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	if (rtlpriv->enter_ps)
		rtl_lps_enter(hw);
	else
		rtl_lps_leave(hw);
}
EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);

void rtl_swlps_wq_callback(void *data)
{
	struct rtl_works *rtlworks = container_of_dwork_rtl(data,
				     struct rtl_works,
				     ps_work);
	struct ieee80211_hw *hw = rtlworks->hw;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	bool ps = false;

	ps = (hw->conf.flags & IEEE80211_CONF_PS);

	/* we can sleep after ps null send ok */
	if (rtlpriv->psc.state_inap) {
		rtl_swlps_rf_sleep(hw);

		if (rtlpriv->psc.state && !ps) {
			rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
						 rtlpriv->psc.last_action);
		}

		if (ps)
			rtlpriv->psc.last_slept = jiffies;

		rtlpriv->psc.last_action = jiffies;
		rtlpriv->psc.state = ps;
	}
}

static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
			   unsigned int len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_mgmt *mgmt = data;
	struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
	u8 *pos, *end, *ie;
	u16 noa_len;
	static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
	u8 noa_num, index , i, noa_index = 0;
	bool find_p2p_ie = false , find_p2p_ps_ie = false;
	pos = (u8 *)mgmt->u.beacon.variable;
	end = data + len;
	ie = NULL;

	while (pos + 1 < end) {
		if (pos + 2 + pos[1] > end)
			return;

		if (pos[0] == 221 && pos[1] > 4) {
			if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
				ie = pos + 2+4;
				break;
			}
		}
		pos += 2 + pos[1];
	}

	if (ie == NULL)
		return;
	find_p2p_ie = true;
	/*to find noa ie*/
	while (ie + 1 < end) {
		noa_len = READEF2BYTE((__le16 *)&ie[1]);
		if (ie + 3 + ie[1] > end)
			return;

		if (ie[0] == 12) {
			find_p2p_ps_ie = true;
			if ((noa_len - 2) % 13 != 0) {
				RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
					 "P2P notice of absence: invalid length.%d\n",
					 noa_len);
				return;
			} else {
				noa_num = (noa_len - 2) / 13;
			}
			noa_index = ie[3];
			if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
			    P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
				RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
					 "update NOA ie.\n");
				p2pinfo->noa_index = noa_index;
				p2pinfo->opp_ps = (ie[4] >> 7);
				p2pinfo->ctwindow = ie[4] & 0x7F;
				p2pinfo->noa_num = noa_num;
				index = 5;
				for (i = 0; i < noa_num; i++) {
					p2pinfo->noa_count_type[i] =
							READEF1BYTE(ie+index);
					index += 1;
					p2pinfo->noa_duration[i] =
						 READEF4BYTE((__le32 *)ie+index);
					index += 4;
					p2pinfo->noa_interval[i] =
						 READEF4BYTE((__le32 *)ie+index);
					index += 4;
					p2pinfo->noa_start_time[i] =
						 READEF4BYTE((__le32 *)ie+index);
					index += 4;
				}

				if (p2pinfo->opp_ps == 1) {
					p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
					/* Driver should wait LPS entering
					 * CTWindow
					 */
					if (rtlpriv->psc.fw_current_inpsmode)
						rtl_p2p_ps_cmd(hw,
							       P2P_PS_ENABLE);
				} else if (p2pinfo->noa_num > 0) {
					p2pinfo->p2p_ps_mode = P2P_PS_NOA;
					rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
				} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
					rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
				}
			}
			break;
		}
		ie += 3 + noa_len;
	}

	if (find_p2p_ie == true) {
		if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
		    (find_p2p_ps_ie == false))
			rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
	}
}

static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
			      unsigned int len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct ieee80211_mgmt *mgmt = data;
	struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
	u8 noa_num, index , i , noa_index = 0;
	u8 *pos, *end, *ie;
	u16 noa_len;
	static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};

	pos = (u8 *)&mgmt->u.action.category;
	end = data + len;
	ie = NULL;

	if (pos[0] == 0x7f) {
		if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
			ie = pos + 3+4;
	}

	if (ie == NULL)
		return;

	RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
	/*to find noa ie*/
	while (ie + 1 < end) {
		noa_len = READEF2BYTE((__le16 *)&ie[1]);
		if (ie + 3 + ie[1] > end)
			return;

		if (ie[0] == 12) {
			RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
			RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
				      ie, noa_len);
			if ((noa_len - 2) % 13 != 0) {
				RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
					 "P2P notice of absence: invalid length.%d\n",
					 noa_len);
				return;
			} else {
				noa_num = (noa_len - 2) / 13;
			}
			noa_index = ie[3];
			if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
			    P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
				p2pinfo->noa_index = noa_index;
				p2pinfo->opp_ps = (ie[4] >> 7);
				p2pinfo->ctwindow = ie[4] & 0x7F;
				p2pinfo->noa_num = noa_num;
				index = 5;
				for (i = 0; i < noa_num; i++) {
					p2pinfo->noa_count_type[i] =
							READEF1BYTE(ie+index);
					index += 1;
					p2pinfo->noa_duration[i] =
							 READEF4BYTE((__le32 *)ie+index);
					index += 4;
					p2pinfo->noa_interval[i] =
							 READEF4BYTE((__le32 *)ie+index);
					index += 4;
					p2pinfo->noa_start_time[i] =
							 READEF4BYTE((__le32 *)ie+index);
					index += 4;
				}

				if (p2pinfo->opp_ps == 1) {
					p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
					/* Driver should wait LPS entering
					 * CTWindow
					 */
					if (rtlpriv->psc.fw_current_inpsmode)
						rtl_p2p_ps_cmd(hw,
							       P2P_PS_ENABLE);
				} else if (p2pinfo->noa_num > 0) {
					p2pinfo->p2p_ps_mode = P2P_PS_NOA;
					rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
				} else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
					rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
				}
			}
			break;
		}
		ie += 3 + noa_len;
	}
}

void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
	struct rtl_p2p_ps_info  *p2pinfo = &(rtlpriv->psc.p2p_ps_info);

	RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
	switch (p2p_ps_state) {
	case P2P_PS_DISABLE:
		p2pinfo->p2p_ps_state = p2p_ps_state;
		rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
					      &p2p_ps_state);
		p2pinfo->noa_index = 0;
		p2pinfo->ctwindow = 0;
		p2pinfo->opp_ps = 0;
		p2pinfo->noa_num = 0;
		p2pinfo->p2p_ps_mode = P2P_PS_NONE;
		if (rtlps->fw_current_inpsmode) {
			if (rtlps->smart_ps == 0) {
				rtlps->smart_ps = 2;
				rtlpriv->cfg->ops->set_hw_reg(hw,
					 HW_VAR_H2C_FW_PWRMODE,
					 &rtlps->pwr_mode);
			}

		}
		break;
	case P2P_PS_ENABLE:
		if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
			p2pinfo->p2p_ps_state = p2p_ps_state;

			if (p2pinfo->ctwindow > 0) {
				if (rtlps->smart_ps != 0) {
					rtlps->smart_ps = 0;
					rtlpriv->cfg->ops->set_hw_reg(hw,
						 HW_VAR_H2C_FW_PWRMODE,
						 &rtlps->pwr_mode);
				}
			}
			rtlpriv->cfg->ops->set_hw_reg(hw,
				 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
				 &p2p_ps_state);

		}
		break;
	case P2P_PS_SCAN:
	case P2P_PS_SCAN_DONE:
	case P2P_PS_ALLSTASLEEP:
		if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
			p2pinfo->p2p_ps_state = p2p_ps_state;
			rtlpriv->cfg->ops->set_hw_reg(hw,
				 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
				 &p2p_ps_state);
		}
		break;
	default:
		break;
	}
	RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
		 "ctwindow %x oppps %x\n",
		 p2pinfo->ctwindow , p2pinfo->opp_ps);
	RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
		 "count %x duration %x index %x interval %x start time %x noa num %x\n",
		 p2pinfo->noa_count_type[0],
		 p2pinfo->noa_duration[0],
		 p2pinfo->noa_index,
		 p2pinfo->noa_interval[0],
		 p2pinfo->noa_start_time[0],
		 p2pinfo->noa_num);
	RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
}

void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct ieee80211_hdr *hdr = data;

	if (!mac->p2p)
		return;
	if (mac->link_state != MAC80211_LINKED)
		return;
	/* min. beacon length + FCS_LEN */
	if (len <= 40 + FCS_LEN)
		return;

	/* and only beacons from the associated BSSID, please */
	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
		return;

	/* check if this really is a beacon */
	if (!(ieee80211_is_beacon(hdr->frame_control) ||
	      ieee80211_is_probe_resp(hdr->frame_control) ||
	      ieee80211_is_action(hdr->frame_control)))
		return;

	if (ieee80211_is_action(hdr->frame_control))
		rtl_p2p_action_ie(hw , data , len - FCS_LEN);
	else
		rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
}
EXPORT_SYMBOL_GPL(rtl_p2p_info);