Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 708 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/ps.c b/drivers/net/wireless/rtlwifi/ps.c
new file mode 100644
index 000000000000..39b0297ce925
--- /dev/null
+++ b/drivers/net/wireless/rtlwifi/ps.c
@@ -0,0 +1,708 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2010  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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * 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"
+
+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 */
+        rtlpriv->cfg->ops->hw_init(hw);
+        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);
+
+        /*<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;
+        unsigned long flag;
+
+        /*protect_or_not = true; */
+
+        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_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
+                if (ppsc->rfchange_inprogress) {
+                        spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
+                                               flag);
+
+                        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_irqrestore(&rtlpriv->locks.rf_ps_lock,
+                                               flag);
+                        break;
+                }
+        }
+
+no_protect:
+        rtstate = ppsc->rfpwr_state;
+
+        switch (state_toset) {
+        case ERFON:
+                ppsc->rfoff_reason &= (~changesource);
+
+                if ((changesource == RF_CHANGE_BY_HW) &&
+                    (ppsc->hwradiooff == true)) {
+                        ppsc->hwradiooff = false;
+                }
+
+                if (!ppsc->rfoff_reason) {
+                        ppsc->rfoff_reason = 0;
+                        actionallowed = true;
+                }
+
+                break;
+
+        case ERFOFF:
+
+                if ((changesource == RF_CHANGE_BY_HW)
+                    && (ppsc->hwradiooff == false)) {
+                        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 process\n"));
+                break;
+        }
+
+        if (actionallowed)
+                rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
+
+        if (!protect_or_not) {
+                spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
+                ppsc->rfchange_inprogress = false;
+                spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
+        }
+
+        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->link_state > MAC80211_NOLINK)
+                return;
+
+        if (is_hal_stop(rtlhal))
+                return;
+
+        if (rtlpriv->sec.being_setkey)
+                return;
+
+        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;
+
+                        /*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));
+}
+
+void rtl_ips_nic_on(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));
+        enum rf_pwrstate rtstate;
+        unsigned long flags;
+
+        if (mac->opmode != NL80211_IFTYPE_STATION)
+                return;
+
+        spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
+
+        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);
+                }
+        }
+
+        spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
+}
+
+/*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.*/
+static 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));
+        u8 rpwm_val, fw_pwrmode;
+
+        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) {
+                bool fw_current_inps;
+                if (ppsc->dot11_psmode == EACTIVE) {
+                        RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
+                                 ("FW LPS leave ps_mode:%x\n",
+                                  FW_PS_ACTIVE_MODE));
+
+                        rpwm_val = 0x0C;        /* RF on */
+                        fw_pwrmode = FW_PS_ACTIVE_MODE;
+                        rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
+                                        (u8 *) (&rpwm_val));
+                        rtlpriv->cfg->ops->set_hw_reg(hw,
+                                        HW_VAR_H2C_FW_PWRMODE,
+                                        (u8 *) (&fw_pwrmode));
+                        fw_current_inps = false;
+
+                        rtlpriv->cfg->ops->set_hw_reg(hw,
+                                        HW_VAR_FW_PSMODE_STATUS,
+                                        (u8 *) (&fw_current_inps));
+
+                } else {
+                        if (rtl_get_fwlps_doze(hw)) {
+                                RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
+                                                ("FW LPS enter ps_mode:%x\n",
+                                                 ppsc->fwctrl_psmode));
+
+                                rpwm_val = 0x02;        /* RF off */
+                                fw_current_inps = true;
+                                rtlpriv->cfg->ops->set_hw_reg(hw,
+                                                HW_VAR_FW_PSMODE_STATUS,
+                                                (u8 *) (&fw_current_inps));
+                                rtlpriv->cfg->ops->set_hw_reg(hw,
+                                                HW_VAR_H2C_FW_PWRMODE,
+                                                (u8 *) (&ppsc->fwctrl_psmode));
+
+                                rtlpriv->cfg->ops->set_hw_reg(hw,
+                                                HW_VAR_SET_RPWM,
+                                                (u8 *) (&rpwm_val));
+                        } 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);
+}
+
+/*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);
+}
+
+/* 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 = (void *) 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 (compare_ether_addr(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));
+        }
+}
+
+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_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
+        if (rtlpriv->psc.rfchange_inprogress) {
+                spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
+                return;
+        }
+        spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
+
+        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_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;
+        }
+}