/****************************************************************************** * * 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 <linux/export.h> #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); 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) { struct rtl_priv *rtlpriv = rtl_priv(hw); struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); bool actionallowed = false; 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 == 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); 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); 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); 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; mutex_lock(&rtlpriv->locks.ps_mutex); /* 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); } } mutex_unlock(&rtlpriv->locks.ps_mutex); } /*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)); mutex_lock(&rtlpriv->locks.ps_mutex); 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); } } mutex_unlock(&rtlpriv->locks.ps_mutex); } /* 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)); 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); } mutex_lock(&rtlpriv->locks.ps_mutex); rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS); mutex_unlock(&rtlpriv->locks.ps_mutex); } 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)); 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; mutex_lock(&rtlpriv->locks.ps_mutex); rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS); mutex_unlock(&rtlpriv->locks.ps_mutex); 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; } }