1 /******************************************************************************
3 * Copyright(c) 2009-2012 Realtek Corporation.
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.
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
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
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
26 * Larry Finger <Larry.Finger@lwfinger.net>
28 *****************************************************************************/
30 #include <linux/export.h>
35 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
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));
41 /*<1> reset trx ring */
42 if (rtlhal->interface == INTF_PCI)
43 rtlpriv->intf_ops->reset_trx_ring(hw);
45 if (is_hal_stop(rtlhal))
46 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
47 "Driver is already down!\n");
49 /*<2> Enable Adapter */
50 if (rtlpriv->cfg->ops->hw_init(hw))
52 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
54 /*<3> Enable Interrupt */
55 rtlpriv->cfg->ops->enable_interrupt(hw);
58 rtl_watch_dog_timer_callback((unsigned long)hw);
62 EXPORT_SYMBOL(rtl_ps_enable_nic);
64 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
66 struct rtl_priv *rtlpriv = rtl_priv(hw);
68 /*<1> Stop all timer */
69 rtl_deinit_deferred_work(hw);
71 /*<2> Disable Interrupt */
72 rtlpriv->cfg->ops->disable_interrupt(hw);
73 tasklet_kill(&rtlpriv->works.irq_tasklet);
75 /*<3> Disable Adapter */
76 rtlpriv->cfg->ops->hw_disable(hw);
80 EXPORT_SYMBOL(rtl_ps_disable_nic);
82 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
83 enum rf_pwrstate state_toset,
86 struct rtl_priv *rtlpriv = rtl_priv(hw);
87 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
88 bool actionallowed = false;
90 switch (state_toset) {
92 ppsc->rfoff_reason &= (~changesource);
94 if ((changesource == RF_CHANGE_BY_HW) &&
96 ppsc->hwradiooff = false;
99 if (!ppsc->rfoff_reason) {
100 ppsc->rfoff_reason = 0;
101 actionallowed = true;
108 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
109 ppsc->hwradiooff = true;
112 ppsc->rfoff_reason |= changesource;
113 actionallowed = true;
117 ppsc->rfoff_reason |= changesource;
118 actionallowed = true;
122 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
123 "switch case not processed\n");
128 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
130 return actionallowed;
132 EXPORT_SYMBOL(rtl_ps_set_rf_state);
134 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
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));
140 ppsc->swrf_processing = true;
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);
152 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
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);
163 ppsc->swrf_processing = false;
166 void rtl_ips_nic_off_wq_callback(void *data)
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;
177 if (mac->opmode != NL80211_IFTYPE_STATION) {
178 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
179 "not station return\n");
183 if (mac->link_state > MAC80211_NOLINK)
186 if (is_hal_stop(rtlhal))
189 if (rtlpriv->sec.being_setkey)
192 if (ppsc->inactiveps) {
193 rtstate = ppsc->rfpwr_state;
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)
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");
212 ppsc->inactive_pwrstate = ERFOFF;
213 ppsc->in_powersavemode = true;
215 /*rtl_pci_reset_trx_ring(hw); */
216 _rtl_ps_inactive_ps(hw);
221 void rtl_ips_nic_off(struct ieee80211_hw *hw)
223 struct rtl_priv *rtlpriv = rtl_priv(hw);
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
230 queue_delayed_work(rtlpriv->works.rtl_wq,
231 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
234 void rtl_ips_nic_on(struct ieee80211_hw *hw)
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;
242 if (mac->opmode != NL80211_IFTYPE_STATION)
245 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
247 if (ppsc->inactiveps) {
248 rtstate = ppsc->rfpwr_state;
250 if (rtstate != ERFON &&
251 !ppsc->swrf_processing &&
252 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
254 ppsc->inactive_pwrstate = ERFON;
255 ppsc->in_powersavemode = false;
257 _rtl_ps_inactive_ps(hw);
261 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
267 *Determine if we can set Fw into PS mode
268 *in current condition.Return TRUE if it
271 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
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));
278 ps_timediff = jiffies_to_msecs(jiffies -
279 ppsc->last_delaylps_stamp_jiffies);
281 if (ps_timediff < 2000) {
282 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
283 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
287 if (mac->link_state != MAC80211_LINKED)
290 if (mac->opmode == NL80211_IFTYPE_ADHOC)
296 /* Change current and default preamble mode.*/
297 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
299 struct rtl_priv *rtlpriv = rtl_priv(hw);
300 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
301 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
302 u8 rpwm_val, fw_pwrmode;
304 if (mac->opmode == NL80211_IFTYPE_ADHOC)
307 if (mac->link_state != MAC80211_LINKED)
310 if (ppsc->dot11_psmode == rt_psmode)
313 /* Update power save mode configured. */
314 ppsc->dot11_psmode = rt_psmode;
319 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
320 * cmd to set Fw into PS mode.
322 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
323 * mode and set RPWM to turn RF on.
326 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
327 bool fw_current_inps;
328 if (ppsc->dot11_psmode == EACTIVE) {
329 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
330 "FW LPS leave ps_mode:%x\n",
333 rpwm_val = 0x0C; /* RF on */
334 fw_pwrmode = FW_PS_ACTIVE_MODE;
335 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
337 rtlpriv->cfg->ops->set_hw_reg(hw,
338 HW_VAR_H2C_FW_PWRMODE,
340 fw_current_inps = false;
342 rtlpriv->cfg->ops->set_hw_reg(hw,
343 HW_VAR_FW_PSMODE_STATUS,
344 (u8 *) (&fw_current_inps));
347 if (rtl_get_fwlps_doze(hw)) {
348 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
349 "FW LPS enter ps_mode:%x\n",
350 ppsc->fwctrl_psmode);
352 rpwm_val = 0x02; /* RF off */
353 fw_current_inps = true;
354 rtlpriv->cfg->ops->set_hw_reg(hw,
355 HW_VAR_FW_PSMODE_STATUS,
356 (u8 *) (&fw_current_inps));
357 rtlpriv->cfg->ops->set_hw_reg(hw,
358 HW_VAR_H2C_FW_PWRMODE,
359 &ppsc->fwctrl_psmode);
361 rtlpriv->cfg->ops->set_hw_reg(hw,
365 /* Reset the power save related parameters. */
366 ppsc->dot11_psmode = EACTIVE;
372 /*Enter the leisure power save mode.*/
373 void rtl_lps_enter(struct ieee80211_hw *hw)
375 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
376 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
377 struct rtl_priv *rtlpriv = rtl_priv(hw);
379 if (!ppsc->fwctrl_lps)
382 if (rtlpriv->sec.being_setkey)
385 if (rtlpriv->link_info.busytraffic)
388 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
389 if (mac->cnt_after_linked < 5)
392 if (mac->opmode == NL80211_IFTYPE_ADHOC)
395 if (mac->link_state != MAC80211_LINKED)
398 mutex_lock(&rtlpriv->locks.ps_mutex);
400 /* Idle for a while if we connect to AP a while ago. */
401 if (mac->cnt_after_linked >= 2) {
402 if (ppsc->dot11_psmode == EACTIVE) {
403 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
404 "Enter 802.11 power save mode...\n");
406 rtl_lps_set_psmode(hw, EAUTOPS);
410 mutex_unlock(&rtlpriv->locks.ps_mutex);
413 /*Leave the leisure power save mode.*/
414 void rtl_lps_leave(struct ieee80211_hw *hw)
416 struct rtl_priv *rtlpriv = rtl_priv(hw);
417 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
418 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
420 mutex_lock(&rtlpriv->locks.ps_mutex);
422 if (ppsc->fwctrl_lps) {
423 if (ppsc->dot11_psmode != EACTIVE) {
426 rtlpriv->cfg->ops->enable_interrupt(hw);
428 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
429 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
430 rtlhal->interface == INTF_PCI) {
431 rtlpriv->intf_ops->disable_aspm(hw);
432 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
435 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
436 "Busy Traffic,Leave 802.11 power save..\n");
438 rtl_lps_set_psmode(hw, EACTIVE);
441 mutex_unlock(&rtlpriv->locks.ps_mutex);
445 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
447 struct rtl_priv *rtlpriv = rtl_priv(hw);
448 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
449 struct ieee80211_hdr *hdr = data;
450 struct ieee80211_tim_ie *tim_ie;
456 if (mac->opmode != NL80211_IFTYPE_STATION)
459 if (!rtlpriv->psc.swctrl_lps)
462 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
465 if (!rtlpriv->psc.sw_ps_enabled)
468 if (rtlpriv->psc.fwctrl_lps)
471 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
474 /* check if this really is a beacon */
475 if (!ieee80211_is_beacon(hdr->frame_control))
478 /* min. beacon length + FCS_LEN */
479 if (len <= 40 + FCS_LEN)
482 /* and only beacons from the associated BSSID, please */
483 if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
486 rtlpriv->psc.last_beacon = jiffies;
488 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
492 if (tim[1] < sizeof(*tim_ie))
496 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
498 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
499 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
501 /* Check whenever the PHY can be turned off again. */
503 /* 1. What about buffered unicast traffic for our AID? */
504 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
505 rtlpriv->mac80211.assoc_id);
507 /* 2. Maybe the AP wants to send multicast/broadcast data? */
508 m_buffed = tim_ie->bitmap_ctrl & 0x01;
509 rtlpriv->psc.multi_buffered = m_buffed;
511 /* unicast will process by mac80211 through
512 * set ~IEEE80211_CONF_PS, So we just check
513 * multicast frames here */
515 /* back to low-power land. and delay is
516 * prevent null power save frame tx fail */
517 queue_delayed_work(rtlpriv->works.rtl_wq,
518 &rtlpriv->works.ps_work, MSECS(5));
520 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
521 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
525 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
527 struct rtl_priv *rtlpriv = rtl_priv(hw);
528 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
529 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
531 if (!rtlpriv->psc.swctrl_lps)
533 if (mac->link_state != MAC80211_LINKED)
536 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
537 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
538 rtlpriv->intf_ops->disable_aspm(hw);
539 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
542 mutex_lock(&rtlpriv->locks.ps_mutex);
543 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
544 mutex_unlock(&rtlpriv->locks.ps_mutex);
547 void rtl_swlps_rfon_wq_callback(void *data)
549 struct rtl_works *rtlworks =
550 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
551 struct ieee80211_hw *hw = rtlworks->hw;
553 rtl_swlps_rf_awake(hw);
556 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
558 struct rtl_priv *rtlpriv = rtl_priv(hw);
559 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
560 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
563 if (!rtlpriv->psc.sw_ps_enabled)
566 if ((rtlpriv->sec.being_setkey) ||
567 (mac->opmode == NL80211_IFTYPE_ADHOC))
570 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
571 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
574 if (rtlpriv->link_info.busytraffic)
577 mutex_lock(&rtlpriv->locks.ps_mutex);
578 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
579 mutex_unlock(&rtlpriv->locks.ps_mutex);
581 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
582 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
583 rtlpriv->intf_ops->enable_aspm(hw);
584 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
587 /* here is power save alg, when this beacon is DTIM
588 * we will set sleep time to dtim_period * n;
589 * when this beacon is not DTIM, we will set sleep
590 * time to sleep_intv = rtlpriv->psc.dtim_counter or
591 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
593 if (rtlpriv->psc.dtim_counter == 0) {
594 if (hw->conf.ps_dtim_period == 1)
595 sleep_intv = hw->conf.ps_dtim_period * 2;
597 sleep_intv = hw->conf.ps_dtim_period;
599 sleep_intv = rtlpriv->psc.dtim_counter;
602 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
603 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
605 /* this print should always be dtim_conter = 0 &
606 * sleep = dtim_period, that meaons, we should
607 * awake before every dtim */
608 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
609 "dtim_counter:%x will sleep :%d beacon_intv\n",
610 rtlpriv->psc.dtim_counter, sleep_intv);
612 /* we tested that 40ms is enough for sw & hw sw delay */
613 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
614 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
618 void rtl_swlps_wq_callback(void *data)
620 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
623 struct ieee80211_hw *hw = rtlworks->hw;
624 struct rtl_priv *rtlpriv = rtl_priv(hw);
627 ps = (hw->conf.flags & IEEE80211_CONF_PS);
629 /* we can sleep after ps null send ok */
630 if (rtlpriv->psc.state_inap) {
631 rtl_swlps_rf_sleep(hw);
633 if (rtlpriv->psc.state && !ps) {
634 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
635 rtlpriv->psc.last_action);
639 rtlpriv->psc.last_slept = jiffies;
641 rtlpriv->psc.last_action = jiffies;
642 rtlpriv->psc.state = ps;