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 <linux/export.h>
31 #include "wifi.h"
32 #include "base.h"
33 #include "ps.h"
34
rtl_ps_enable_nic(struct ieee80211_hw * hw)35 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
36 {
37 struct rtl_priv *rtlpriv = rtl_priv(hw);
38 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
39 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
40
41 /*<1> reset trx ring */
42 if (rtlhal->interface == INTF_PCI)
43 rtlpriv->intf_ops->reset_trx_ring(hw);
44
45 if (is_hal_stop(rtlhal))
46 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
47 ("Driver is already down!\n"));
48
49 /*<2> Enable Adapter */
50 rtlpriv->cfg->ops->hw_init(hw);
51 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
52
53 /*<3> Enable Interrupt */
54 rtlpriv->cfg->ops->enable_interrupt(hw);
55
56 /*<enable timer> */
57 rtl_watch_dog_timer_callback((unsigned long)hw);
58
59 return true;
60 }
61 EXPORT_SYMBOL(rtl_ps_enable_nic);
62
rtl_ps_disable_nic(struct ieee80211_hw * hw)63 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
64 {
65 struct rtl_priv *rtlpriv = rtl_priv(hw);
66
67 /*<1> Stop all timer */
68 rtl_deinit_deferred_work(hw);
69
70 /*<2> Disable Interrupt */
71 rtlpriv->cfg->ops->disable_interrupt(hw);
72 tasklet_kill(&rtlpriv->works.irq_tasklet);
73
74 /*<3> Disable Adapter */
75 rtlpriv->cfg->ops->hw_disable(hw);
76
77 return true;
78 }
79 EXPORT_SYMBOL(rtl_ps_disable_nic);
80
rtl_ps_set_rf_state(struct ieee80211_hw * hw,enum rf_pwrstate state_toset,u32 changesource)81 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
82 enum rf_pwrstate state_toset,
83 u32 changesource)
84 {
85 struct rtl_priv *rtlpriv = rtl_priv(hw);
86 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
87 bool actionallowed = false;
88
89 switch (state_toset) {
90 case ERFON:
91 ppsc->rfoff_reason &= (~changesource);
92
93 if ((changesource == RF_CHANGE_BY_HW) &&
94 (ppsc->hwradiooff)) {
95 ppsc->hwradiooff = false;
96 }
97
98 if (!ppsc->rfoff_reason) {
99 ppsc->rfoff_reason = 0;
100 actionallowed = true;
101 }
102
103 break;
104
105 case ERFOFF:
106
107 if ((changesource == RF_CHANGE_BY_HW)
108 && (ppsc->hwradiooff == false)) {
109 ppsc->hwradiooff = true;
110 }
111
112 ppsc->rfoff_reason |= changesource;
113 actionallowed = true;
114 break;
115
116 case ERFSLEEP:
117 ppsc->rfoff_reason |= changesource;
118 actionallowed = true;
119 break;
120
121 default:
122 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
123 ("switch case not process\n"));
124 break;
125 }
126
127 if (actionallowed)
128 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
129
130 return actionallowed;
131 }
132 EXPORT_SYMBOL(rtl_ps_set_rf_state);
133
_rtl_ps_inactive_ps(struct ieee80211_hw * hw)134 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
135 {
136 struct rtl_priv *rtlpriv = rtl_priv(hw);
137 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
138 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
139
140 ppsc->swrf_processing = true;
141
142 if (ppsc->inactive_pwrstate == ERFON &&
143 rtlhal->interface == INTF_PCI) {
144 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
145 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
146 rtlhal->interface == INTF_PCI) {
147 rtlpriv->intf_ops->disable_aspm(hw);
148 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
149 }
150 }
151
152 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
153
154 if (ppsc->inactive_pwrstate == ERFOFF &&
155 rtlhal->interface == INTF_PCI) {
156 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
157 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
158 rtlpriv->intf_ops->enable_aspm(hw);
159 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
160 }
161 }
162
163 ppsc->swrf_processing = false;
164 }
165
rtl_ips_nic_off_wq_callback(void * data)166 void rtl_ips_nic_off_wq_callback(void *data)
167 {
168 struct rtl_works *rtlworks =
169 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
170 struct ieee80211_hw *hw = rtlworks->hw;
171 struct rtl_priv *rtlpriv = rtl_priv(hw);
172 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
173 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
174 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
175 enum rf_pwrstate rtstate;
176
177 if (mac->opmode != NL80211_IFTYPE_STATION) {
178 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
179 ("not station return\n"));
180 return;
181 }
182
183 if (mac->link_state > MAC80211_NOLINK)
184 return;
185
186 if (is_hal_stop(rtlhal))
187 return;
188
189 if (rtlpriv->sec.being_setkey)
190 return;
191
192 if (ppsc->inactiveps) {
193 rtstate = ppsc->rfpwr_state;
194
195 /*
196 *Do not enter IPS in the following conditions:
197 *(1) RF is already OFF or Sleep
198 *(2) swrf_processing (indicates the IPS is still under going)
199 *(3) Connectted (only disconnected can trigger IPS)
200 *(4) IBSS (send Beacon)
201 *(5) AP mode (send Beacon)
202 *(6) monitor mode (rcv packet)
203 */
204
205 if (rtstate == ERFON &&
206 !ppsc->swrf_processing &&
207 (mac->link_state == MAC80211_NOLINK) &&
208 !mac->act_scanning) {
209 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
210 ("IPSEnter(): Turn off RF.\n"));
211
212 ppsc->inactive_pwrstate = ERFOFF;
213 ppsc->in_powersavemode = true;
214
215 /*rtl_pci_reset_trx_ring(hw); */
216 _rtl_ps_inactive_ps(hw);
217 }
218 }
219 }
220
rtl_ips_nic_off(struct ieee80211_hw * hw)221 void rtl_ips_nic_off(struct ieee80211_hw *hw)
222 {
223 struct rtl_priv *rtlpriv = rtl_priv(hw);
224
225 /*
226 *because when link with ap, mac80211 will ask us
227 *to disable nic quickly after scan before linking,
228 *this will cause link failed, so we delay 100ms here
229 */
230 queue_delayed_work(rtlpriv->works.rtl_wq,
231 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
232 }
233
rtl_ips_nic_on(struct ieee80211_hw * hw)234 void rtl_ips_nic_on(struct ieee80211_hw *hw)
235 {
236 struct rtl_priv *rtlpriv = rtl_priv(hw);
237 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
238 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
239 enum rf_pwrstate rtstate;
240 unsigned long flags;
241
242 if (mac->opmode != NL80211_IFTYPE_STATION)
243 return;
244
245 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
246
247 if (ppsc->inactiveps) {
248 rtstate = ppsc->rfpwr_state;
249
250 if (rtstate != ERFON &&
251 !ppsc->swrf_processing &&
252 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
253
254 ppsc->inactive_pwrstate = ERFON;
255 ppsc->in_powersavemode = false;
256
257 _rtl_ps_inactive_ps(hw);
258 }
259 }
260
261 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
262 }
263
264 /*for FW LPS*/
265
266 /*
267 *Determine if we can set Fw into PS mode
268 *in current condition.Return TRUE if it
269 *can enter PS mode.
270 */
rtl_get_fwlps_doze(struct ieee80211_hw * hw)271 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
272 {
273 struct rtl_priv *rtlpriv = rtl_priv(hw);
274 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
275 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
276 u32 ps_timediff;
277
278 ps_timediff = jiffies_to_msecs(jiffies -
279 ppsc->last_delaylps_stamp_jiffies);
280
281 if (ps_timediff < 2000) {
282 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
283 ("Delay enter Fw LPS for DHCP, ARP,"
284 " or EAPOL exchanging state.\n"));
285 return false;
286 }
287
288 if (mac->link_state != MAC80211_LINKED)
289 return false;
290
291 if (mac->opmode == NL80211_IFTYPE_ADHOC)
292 return false;
293
294 return true;
295 }
296
297 /* Change current and default preamble mode.*/
rtl_lps_set_psmode(struct ieee80211_hw * hw,u8 rt_psmode)298 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
299 {
300 struct rtl_priv *rtlpriv = rtl_priv(hw);
301 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
302 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
303 u8 rpwm_val, fw_pwrmode;
304
305 if (mac->opmode == NL80211_IFTYPE_ADHOC)
306 return;
307
308 if (mac->link_state != MAC80211_LINKED)
309 return;
310
311 if (ppsc->dot11_psmode == rt_psmode)
312 return;
313
314 /* Update power save mode configured. */
315 ppsc->dot11_psmode = rt_psmode;
316
317 /*
318 *<FW control LPS>
319 *1. Enter PS mode
320 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
321 * cmd to set Fw into PS mode.
322 *2. Leave PS mode
323 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
324 * mode and set RPWM to turn RF on.
325 */
326
327 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
328 bool fw_current_inps;
329 if (ppsc->dot11_psmode == EACTIVE) {
330 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
331 ("FW LPS leave ps_mode:%x\n",
332 FW_PS_ACTIVE_MODE));
333
334 rpwm_val = 0x0C; /* RF on */
335 fw_pwrmode = FW_PS_ACTIVE_MODE;
336 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
337 (u8 *) (&rpwm_val));
338 rtlpriv->cfg->ops->set_hw_reg(hw,
339 HW_VAR_H2C_FW_PWRMODE,
340 (u8 *) (&fw_pwrmode));
341 fw_current_inps = false;
342
343 rtlpriv->cfg->ops->set_hw_reg(hw,
344 HW_VAR_FW_PSMODE_STATUS,
345 (u8 *) (&fw_current_inps));
346
347 } else {
348 if (rtl_get_fwlps_doze(hw)) {
349 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
350 ("FW LPS enter ps_mode:%x\n",
351 ppsc->fwctrl_psmode));
352
353 rpwm_val = 0x02; /* RF off */
354 fw_current_inps = true;
355 rtlpriv->cfg->ops->set_hw_reg(hw,
356 HW_VAR_FW_PSMODE_STATUS,
357 (u8 *) (&fw_current_inps));
358 rtlpriv->cfg->ops->set_hw_reg(hw,
359 HW_VAR_H2C_FW_PWRMODE,
360 (u8 *) (&ppsc->fwctrl_psmode));
361
362 rtlpriv->cfg->ops->set_hw_reg(hw,
363 HW_VAR_SET_RPWM,
364 (u8 *) (&rpwm_val));
365 } else {
366 /* Reset the power save related parameters. */
367 ppsc->dot11_psmode = EACTIVE;
368 }
369 }
370 }
371 }
372
373 /*Enter the leisure power save mode.*/
rtl_lps_enter(struct ieee80211_hw * hw)374 void rtl_lps_enter(struct ieee80211_hw *hw)
375 {
376 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
377 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
378 struct rtl_priv *rtlpriv = rtl_priv(hw);
379
380 if (!ppsc->fwctrl_lps)
381 return;
382
383 if (rtlpriv->sec.being_setkey)
384 return;
385
386 if (rtlpriv->link_info.busytraffic)
387 return;
388
389 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
390 if (mac->cnt_after_linked < 5)
391 return;
392
393 if (mac->opmode == NL80211_IFTYPE_ADHOC)
394 return;
395
396 if (mac->link_state != MAC80211_LINKED)
397 return;
398
399 mutex_lock(&rtlpriv->locks.ps_mutex);
400
401 /* Idle for a while if we connect to AP a while ago. */
402 if (mac->cnt_after_linked >= 2) {
403 if (ppsc->dot11_psmode == EACTIVE) {
404 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
405 ("Enter 802.11 power save mode...\n"));
406
407 rtl_lps_set_psmode(hw, EAUTOPS);
408 }
409 }
410
411 mutex_unlock(&rtlpriv->locks.ps_mutex);
412 }
413
414 /*Leave the leisure power save mode.*/
rtl_lps_leave(struct ieee80211_hw * hw)415 void rtl_lps_leave(struct ieee80211_hw *hw)
416 {
417 struct rtl_priv *rtlpriv = rtl_priv(hw);
418 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
419 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
420
421 mutex_lock(&rtlpriv->locks.ps_mutex);
422
423 if (ppsc->fwctrl_lps) {
424 if (ppsc->dot11_psmode != EACTIVE) {
425
426 /*FIX ME */
427 rtlpriv->cfg->ops->enable_interrupt(hw);
428
429 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
430 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
431 rtlhal->interface == INTF_PCI) {
432 rtlpriv->intf_ops->disable_aspm(hw);
433 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
434 }
435
436 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
437 ("Busy Traffic,Leave 802.11 power save..\n"));
438
439 rtl_lps_set_psmode(hw, EACTIVE);
440 }
441 }
442 mutex_unlock(&rtlpriv->locks.ps_mutex);
443 }
444
445 /* For sw LPS*/
rtl_swlps_beacon(struct ieee80211_hw * hw,void * data,unsigned int len)446 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
447 {
448 struct rtl_priv *rtlpriv = rtl_priv(hw);
449 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
450 struct ieee80211_hdr *hdr = (void *) data;
451 struct ieee80211_tim_ie *tim_ie;
452 u8 *tim;
453 u8 tim_len;
454 bool u_buffed;
455 bool m_buffed;
456
457 if (mac->opmode != NL80211_IFTYPE_STATION)
458 return;
459
460 if (!rtlpriv->psc.swctrl_lps)
461 return;
462
463 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
464 return;
465
466 if (!rtlpriv->psc.sw_ps_enabled)
467 return;
468
469 if (rtlpriv->psc.fwctrl_lps)
470 return;
471
472 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
473 return;
474
475 /* check if this really is a beacon */
476 if (!ieee80211_is_beacon(hdr->frame_control))
477 return;
478
479 /* min. beacon length + FCS_LEN */
480 if (len <= 40 + FCS_LEN)
481 return;
482
483 /* and only beacons from the associated BSSID, please */
484 if (compare_ether_addr(hdr->addr3, rtlpriv->mac80211.bssid))
485 return;
486
487 rtlpriv->psc.last_beacon = jiffies;
488
489 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
490 if (!tim)
491 return;
492
493 if (tim[1] < sizeof(*tim_ie))
494 return;
495
496 tim_len = tim[1];
497 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
498
499 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
500 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
501
502 /* Check whenever the PHY can be turned off again. */
503
504 /* 1. What about buffered unicast traffic for our AID? */
505 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
506 rtlpriv->mac80211.assoc_id);
507
508 /* 2. Maybe the AP wants to send multicast/broadcast data? */
509 m_buffed = tim_ie->bitmap_ctrl & 0x01;
510 rtlpriv->psc.multi_buffered = m_buffed;
511
512 /* unicast will process by mac80211 through
513 * set ~IEEE80211_CONF_PS, So we just check
514 * multicast frames here */
515 if (!m_buffed) {
516 /* back to low-power land. and delay is
517 * prevent null power save frame tx fail */
518 queue_delayed_work(rtlpriv->works.rtl_wq,
519 &rtlpriv->works.ps_work, MSECS(5));
520 } else {
521 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, ("u_bufferd: %x, "
522 "m_buffered: %x\n", u_buffed, m_buffed));
523 }
524 }
525
rtl_swlps_rf_awake(struct ieee80211_hw * hw)526 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
527 {
528 struct rtl_priv *rtlpriv = rtl_priv(hw);
529 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
530 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
531
532 if (!rtlpriv->psc.swctrl_lps)
533 return;
534 if (mac->link_state != MAC80211_LINKED)
535 return;
536
537 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
538 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
539 rtlpriv->intf_ops->disable_aspm(hw);
540 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
541 }
542
543 mutex_lock(&rtlpriv->locks.ps_mutex);
544 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
545 mutex_unlock(&rtlpriv->locks.ps_mutex);
546 }
547
rtl_swlps_rfon_wq_callback(void * data)548 void rtl_swlps_rfon_wq_callback(void *data)
549 {
550 struct rtl_works *rtlworks =
551 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
552 struct ieee80211_hw *hw = rtlworks->hw;
553
554 rtl_swlps_rf_awake(hw);
555 }
556
rtl_swlps_rf_sleep(struct ieee80211_hw * hw)557 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
558 {
559 struct rtl_priv *rtlpriv = rtl_priv(hw);
560 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
561 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
562 u8 sleep_intv;
563
564 if (!rtlpriv->psc.sw_ps_enabled)
565 return;
566
567 if ((rtlpriv->sec.being_setkey) ||
568 (mac->opmode == NL80211_IFTYPE_ADHOC))
569 return;
570
571 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
572 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
573 return;
574
575 if (rtlpriv->link_info.busytraffic)
576 return;
577
578 mutex_lock(&rtlpriv->locks.ps_mutex);
579 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
580 mutex_unlock(&rtlpriv->locks.ps_mutex);
581
582 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
583 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
584 rtlpriv->intf_ops->enable_aspm(hw);
585 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
586 }
587
588 /* here is power save alg, when this beacon is DTIM
589 * we will set sleep time to dtim_period * n;
590 * when this beacon is not DTIM, we will set sleep
591 * time to sleep_intv = rtlpriv->psc.dtim_counter or
592 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
593
594 if (rtlpriv->psc.dtim_counter == 0) {
595 if (hw->conf.ps_dtim_period == 1)
596 sleep_intv = hw->conf.ps_dtim_period * 2;
597 else
598 sleep_intv = hw->conf.ps_dtim_period;
599 } else {
600 sleep_intv = rtlpriv->psc.dtim_counter;
601 }
602
603 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
604 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
605
606 /* this print should always be dtim_conter = 0 &
607 * sleep = dtim_period, that meaons, we should
608 * awake before every dtim */
609 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
610 ("dtim_counter:%x will sleep :%d"
611 " beacon_intv\n", rtlpriv->psc.dtim_counter, sleep_intv));
612
613 /* we tested that 40ms is enough for sw & hw sw delay */
614 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
615 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
616 }
617
618
rtl_swlps_wq_callback(void * data)619 void rtl_swlps_wq_callback(void *data)
620 {
621 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
622 struct rtl_works,
623 ps_work);
624 struct ieee80211_hw *hw = rtlworks->hw;
625 struct rtl_priv *rtlpriv = rtl_priv(hw);
626 bool ps = false;
627
628 ps = (hw->conf.flags & IEEE80211_CONF_PS);
629
630 /* we can sleep after ps null send ok */
631 if (rtlpriv->psc.state_inap) {
632 rtl_swlps_rf_sleep(hw);
633
634 if (rtlpriv->psc.state && !ps) {
635 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
636 rtlpriv->psc.last_action);
637 }
638
639 if (ps)
640 rtlpriv->psc.last_slept = jiffies;
641
642 rtlpriv->psc.last_action = jiffies;
643 rtlpriv->psc.state = ps;
644 }
645 }
646