493 lines
12 KiB
C
493 lines
12 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2009-2010 Realtek Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* wlanfae <wlanfae@realtek.com>
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* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
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* Hsinchu 300, Taiwan.
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*
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* Larry Finger <Larry.Finger@lwfinger.net>
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*
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*****************************************************************************/
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#include "wifi.h"
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#include "base.h"
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#include "ps.h"
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bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
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bool init_status = true;
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/*<1> reset trx ring */
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if (rtlhal->interface == INTF_PCI)
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rtlpriv->intf_ops->reset_trx_ring(hw);
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if (is_hal_stop(rtlhal))
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RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
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("Driver is already down!\n"));
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/*<2> Enable Adapter */
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rtlpriv->cfg->ops->hw_init(hw);
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RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
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/*init_status = false; */
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/*<3> Enable Interrupt */
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rtlpriv->cfg->ops->enable_interrupt(hw);
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/*<enable timer> */
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rtl_watch_dog_timer_callback((unsigned long)hw);
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return init_status;
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}
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EXPORT_SYMBOL(rtl_ps_enable_nic);
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bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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/*<1> Stop all timer */
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rtl_deinit_deferred_work(hw);
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/*<2> Disable Interrupt */
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rtlpriv->cfg->ops->disable_interrupt(hw);
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/*<3> Disable Adapter */
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rtlpriv->cfg->ops->hw_disable(hw);
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return true;
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}
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EXPORT_SYMBOL(rtl_ps_disable_nic);
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bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
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enum rf_pwrstate state_toset,
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u32 changesource, bool protect_or_not)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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enum rf_pwrstate rtstate;
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bool actionallowed = false;
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u16 rfwait_cnt = 0;
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unsigned long flag;
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/*protect_or_not = true; */
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if (protect_or_not)
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goto no_protect;
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/*
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*Only one thread can change
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*the RF state at one time, and others
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*should wait to be executed.
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*/
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while (true) {
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spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
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if (ppsc->rfchange_inprogress) {
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spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
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flag);
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RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
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("RF Change in progress!"
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"Wait to set..state_toset(%d).\n",
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state_toset));
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/* Set RF after the previous action is done. */
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while (ppsc->rfchange_inprogress) {
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rfwait_cnt++;
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mdelay(1);
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/*
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*Wait too long, return false to avoid
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*to be stuck here.
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*/
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if (rfwait_cnt > 100)
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return false;
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}
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} else {
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ppsc->rfchange_inprogress = true;
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spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
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flag);
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break;
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}
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}
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no_protect:
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rtstate = ppsc->rfpwr_state;
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switch (state_toset) {
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case ERFON:
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ppsc->rfoff_reason &= (~changesource);
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if ((changesource == RF_CHANGE_BY_HW) &&
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(ppsc->hwradiooff == true)) {
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ppsc->hwradiooff = false;
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}
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if (!ppsc->rfoff_reason) {
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ppsc->rfoff_reason = 0;
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actionallowed = true;
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}
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break;
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case ERFOFF:
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if ((changesource == RF_CHANGE_BY_HW)
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&& (ppsc->hwradiooff == false)) {
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ppsc->hwradiooff = true;
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}
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ppsc->rfoff_reason |= changesource;
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actionallowed = true;
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break;
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case ERFSLEEP:
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ppsc->rfoff_reason |= changesource;
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actionallowed = true;
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break;
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default:
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RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
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("switch case not process\n"));
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break;
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}
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if (actionallowed)
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rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
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if (!protect_or_not) {
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spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
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ppsc->rfchange_inprogress = false;
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spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
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}
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return actionallowed;
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}
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EXPORT_SYMBOL(rtl_ps_set_rf_state);
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static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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ppsc->swrf_processing = true;
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if (ppsc->inactive_pwrstate == ERFON && rtlhal->interface == INTF_PCI) {
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if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
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RT_IN_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM) &&
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rtlhal->interface == INTF_PCI) {
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rtlpriv->intf_ops->disable_aspm(hw);
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RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM);
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}
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}
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rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
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RF_CHANGE_BY_IPS, false);
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if (ppsc->inactive_pwrstate == ERFOFF &&
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rtlhal->interface == INTF_PCI) {
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if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) {
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rtlpriv->intf_ops->enable_aspm(hw);
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RT_SET_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM);
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}
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}
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ppsc->swrf_processing = false;
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}
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void rtl_ips_nic_off_wq_callback(void *data)
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{
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struct rtl_works *rtlworks =
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container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
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struct ieee80211_hw *hw = rtlworks->hw;
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
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struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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enum rf_pwrstate rtstate;
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if (mac->opmode != NL80211_IFTYPE_STATION) {
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RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
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("not station return\n"));
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return;
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}
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if (is_hal_stop(rtlhal))
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return;
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if (rtlpriv->sec.being_setkey)
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return;
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if (ppsc->inactiveps) {
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rtstate = ppsc->rfpwr_state;
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/*
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*Do not enter IPS in the following conditions:
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*(1) RF is already OFF or Sleep
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*(2) swrf_processing (indicates the IPS is still under going)
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*(3) Connectted (only disconnected can trigger IPS)
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*(4) IBSS (send Beacon)
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*(5) AP mode (send Beacon)
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*(6) monitor mode (rcv packet)
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*/
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if (rtstate == ERFON &&
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!ppsc->swrf_processing &&
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(mac->link_state == MAC80211_NOLINK) &&
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!mac->act_scanning) {
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RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
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("IPSEnter(): Turn off RF.\n"));
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ppsc->inactive_pwrstate = ERFOFF;
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ppsc->in_powersavemode = true;
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/*rtl_pci_reset_trx_ring(hw); */
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_rtl_ps_inactive_ps(hw);
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}
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}
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}
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void rtl_ips_nic_off(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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/*
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*because when link with ap, mac80211 will ask us
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*to disable nic quickly after scan before linking,
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*this will cause link failed, so we delay 100ms here
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*/
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queue_delayed_work(rtlpriv->works.rtl_wq,
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&rtlpriv->works.ips_nic_off_wq, MSECS(100));
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}
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void rtl_ips_nic_on(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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enum rf_pwrstate rtstate;
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unsigned long flags;
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spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
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if (ppsc->inactiveps) {
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rtstate = ppsc->rfpwr_state;
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if (rtstate != ERFON &&
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!ppsc->swrf_processing &&
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ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
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ppsc->inactive_pwrstate = ERFON;
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ppsc->in_powersavemode = false;
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_rtl_ps_inactive_ps(hw);
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}
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}
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spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
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}
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/*for FW LPS*/
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/*
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*Determine if we can set Fw into PS mode
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*in current condition.Return TRUE if it
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*can enter PS mode.
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*/
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static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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u32 ps_timediff;
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ps_timediff = jiffies_to_msecs(jiffies -
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ppsc->last_delaylps_stamp_jiffies);
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if (ps_timediff < 2000) {
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RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
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("Delay enter Fw LPS for DHCP, ARP,"
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" or EAPOL exchanging state.\n"));
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return false;
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}
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if (mac->link_state != MAC80211_LINKED)
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return false;
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if (mac->opmode == NL80211_IFTYPE_ADHOC)
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return false;
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return true;
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}
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/* Change current and default preamble mode.*/
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static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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u8 rpwm_val, fw_pwrmode;
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if (mac->opmode == NL80211_IFTYPE_ADHOC)
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return;
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if (mac->link_state != MAC80211_LINKED)
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return;
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if (ppsc->dot11_psmode == rt_psmode)
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return;
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/* Update power save mode configured. */
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ppsc->dot11_psmode = rt_psmode;
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/*
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*<FW control LPS>
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*1. Enter PS mode
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* Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
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* cmd to set Fw into PS mode.
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*2. Leave PS mode
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* Send H2C fw_pwrmode cmd to Fw to set Fw into Active
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* mode and set RPWM to turn RF on.
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*/
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if ((ppsc->fwctrl_lps) && (ppsc->leisure_ps) &&
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ppsc->report_linked) {
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bool fw_current_inps;
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if (ppsc->dot11_psmode == EACTIVE) {
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RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
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("FW LPS leave ps_mode:%x\n",
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FW_PS_ACTIVE_MODE));
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rpwm_val = 0x0C; /* RF on */
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fw_pwrmode = FW_PS_ACTIVE_MODE;
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rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
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(u8 *) (&rpwm_val));
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rtlpriv->cfg->ops->set_hw_reg(hw,
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HW_VAR_H2C_FW_PWRMODE,
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(u8 *) (&fw_pwrmode));
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fw_current_inps = false;
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rtlpriv->cfg->ops->set_hw_reg(hw,
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HW_VAR_FW_PSMODE_STATUS,
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(u8 *) (&fw_current_inps));
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} else {
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if (rtl_get_fwlps_doze(hw)) {
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RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
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("FW LPS enter ps_mode:%x\n",
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ppsc->fwctrl_psmode));
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rpwm_val = 0x02; /* RF off */
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fw_current_inps = true;
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rtlpriv->cfg->ops->set_hw_reg(hw,
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HW_VAR_FW_PSMODE_STATUS,
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(u8 *) (&fw_current_inps));
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rtlpriv->cfg->ops->set_hw_reg(hw,
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HW_VAR_H2C_FW_PWRMODE,
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(u8 *) (&ppsc->fwctrl_psmode));
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rtlpriv->cfg->ops->set_hw_reg(hw,
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HW_VAR_SET_RPWM,
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(u8 *) (&rpwm_val));
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} else {
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/* Reset the power save related parameters. */
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ppsc->dot11_psmode = EACTIVE;
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}
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}
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}
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}
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/*Enter the leisure power save mode.*/
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void rtl_lps_enter(struct ieee80211_hw *hw)
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{
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struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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unsigned long flag;
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if (!(ppsc->fwctrl_lps && ppsc->leisure_ps))
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return;
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if (rtlpriv->sec.being_setkey)
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return;
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if (rtlpriv->link_info.busytraffic)
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return;
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/*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
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if (mac->cnt_after_linked < 5)
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return;
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if (mac->opmode == NL80211_IFTYPE_ADHOC)
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return;
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if (mac->link_state != MAC80211_LINKED)
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return;
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spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
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if (ppsc->leisure_ps) {
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/* Idle for a while if we connect to AP a while ago. */
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if (mac->cnt_after_linked >= 2) {
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if (ppsc->dot11_psmode == EACTIVE) {
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RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
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("Enter 802.11 power save mode...\n"));
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rtl_lps_set_psmode(hw, EAUTOPS);
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}
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}
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}
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spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
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}
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/*Leave the leisure power save mode.*/
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void rtl_lps_leave(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
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struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
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unsigned long flag;
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spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
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if (ppsc->fwctrl_lps && ppsc->leisure_ps) {
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if (ppsc->dot11_psmode != EACTIVE) {
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/*FIX ME */
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rtlpriv->cfg->ops->enable_interrupt(hw);
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if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
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RT_IN_PS_LEVEL(ppsc, RT_RF_LPS_LEVEL_ASPM) &&
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rtlhal->interface == INTF_PCI) {
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rtlpriv->intf_ops->disable_aspm(hw);
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RT_CLEAR_PS_LEVEL(ppsc, RT_RF_LPS_LEVEL_ASPM);
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}
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RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
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("Busy Traffic,Leave 802.11 power save..\n"));
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rtl_lps_set_psmode(hw, EACTIVE);
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}
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}
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spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
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}
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