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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / staging / rtl8821ae / ps.c
blobf12ffa83c58d60b51632d5496ee7c0a617fe6b09
1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2010 Realtek Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30 #include "wifi.h"
31 #include "base.h"
32 #include "ps.h"
33 #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 }
Linux with added FPC-III support