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path: root/drivers/net/wireless/rtlwifi/ps.c
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Diffstat (limited to 'drivers/net/wireless/rtlwifi/ps.c')
-rw-r--r--drivers/net/wireless/rtlwifi/ps.c492
1 files changed, 492 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..fd77cd508f50
--- /dev/null
+++ b/drivers/net/wireless/rtlwifi/ps.c
@@ -0,0 +1,492 @@
+/******************************************************************************
+ *
+ * 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));
+ bool init_status = true;
+
+ /*<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);
+ /*init_status = false; */
+
+ /*<3> Enable Interrupt */
+ rtlpriv->cfg->ops->enable_interrupt(hw);
+
+ /*<enable timer> */
+ rtl_watch_dog_timer_callback((unsigned long)hw);
+
+ return init_status;
+}
+EXPORT_SYMBOL(rtl_ps_enable_nic);
+
+bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
+{
+ bool status = true;
+ 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 status;
+}
+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 b_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->b_hwradiooff == true)) {
+ ppsc->b_hwradiooff = false;
+ }
+
+ if (!ppsc->rfoff_reason) {
+ ppsc->rfoff_reason = 0;
+ b_actionallowed = true;
+ }
+
+ break;
+
+ case ERFOFF:
+
+ if ((changesource == RF_CHANGE_BY_HW)
+ && (ppsc->b_hwradiooff == false)) {
+ ppsc->b_hwradiooff = true;
+ }
+
+ ppsc->rfoff_reason |= changesource;
+ b_actionallowed = true;
+ break;
+
+ case ERFSLEEP:
+ ppsc->rfoff_reason |= changesource;
+ b_actionallowed = true;
+ break;
+
+ default:
+ RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+ ("switch case not process\n"));
+ break;
+ }
+
+ if (b_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 b_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->b_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_RF_OFF_LEVL_ASPM) &&
+ rtlhal->interface == INTF_PCI) {
+ rtlpriv->intf_ops->disable_aspm(hw);
+ RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_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) {
+ rtlpriv->intf_ops->enable_aspm(hw);
+ RT_SET_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM);
+ }
+ }
+
+ ppsc->b_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 (is_hal_stop(rtlhal))
+ return;
+
+ if (rtlpriv->sec.being_setkey)
+ return;
+
+ if (ppsc->b_inactiveps) {
+ rtstate = ppsc->rfpwr_state;
+
+ /*
+ *Do not enter IPS in the following conditions:
+ *(1) RF is already OFF or Sleep
+ *(2) b_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->b_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->b_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_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
+ enum rf_pwrstate rtstate;
+
+ down(&rtlpriv->locks.ips_sem);
+
+ if (ppsc->b_inactiveps) {
+ rtstate = ppsc->rfpwr_state;
+
+ if (rtstate != ERFON &&
+ !ppsc->b_swrf_processing &&
+ ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
+
+ ppsc->inactive_pwrstate = ERFON;
+ ppsc->b_in_powersavemode = false;
+
+ _rtl_ps_inactive_ps(hw);
+ }
+ }
+
+ up(&rtlpriv->locks.ips_sem);
+}
+
+/*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->b_fwctrl_lps) && (ppsc->b_leisure_ps) &&
+ ppsc->report_linked) {
+ bool b_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));
+ b_fw_current_inps = false;
+
+ rtlpriv->cfg->ops->set_hw_reg(hw,
+ HW_VAR_FW_PSMODE_STATUS,
+ (u8 *) (&b_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 */
+ b_fw_current_inps = true;
+ rtlpriv->cfg->ops->set_hw_reg(hw,
+ HW_VAR_FW_PSMODE_STATUS,
+ (u8 *) (&b_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->b_fwctrl_lps && ppsc->b_leisure_ps))
+ return;
+
+ if (rtlpriv->sec.being_setkey)
+ return;
+
+ if (rtlpriv->link_info.b_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);
+
+ if (ppsc->b_leisure_ps) {
+ /* 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->b_fwctrl_lps && ppsc->b_leisure_ps) {
+ 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_RF_LPS_LEVEL_ASPM) &&
+ rtlhal->interface == INTF_PCI) {
+ rtlpriv->intf_ops->disable_aspm(hw);
+ RT_CLEAR_PS_LEVEL(ppsc, RT_RF_LPS_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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 03:02:35 +0000