From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pw0-f46.google.com ([209.85.160.46]:54540 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753930Ab0LHRUl (ORCPT ); Wed, 8 Dec 2010 12:20:41 -0500 Received: by pwj3 with SMTP id 3so323975pwj.19 for ; Wed, 08 Dec 2010 09:20:41 -0800 (PST) From: Larry Finger To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, chaoming_li@realsil.com.cn, Larry Finger Subject: [PATCH 07/22] rtl8192ce: Add files to rtlwifi - Part 7: ps.{c,h} Date: Wed, 8 Dec 2010 11:12:37 -0600 Message-Id: <1291828372-25159-8-git-send-email-Larry.Finger@lwfinger.net> In-Reply-To: <1291828372-25159-1-git-send-email-Larry.Finger@lwfinger.net> References: <1291828372-25159-1-git-send-email-Larry.Finger@lwfinger.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: Signed-off-by: Larry Finger --- drivers/net/wireless/rtlwifi/ps.c | 492 +++++++++++++++++++++++++++++++++++++ drivers/net/wireless/rtlwifi/ps.h | 43 ++++ 2 files changed, 535 insertions(+), 0 deletions(-) create mode 100644 drivers/net/wireless/rtlwifi/ps.c create mode 100644 drivers/net/wireless/rtlwifi/ps.h diff --git a/drivers/net/wireless/rtlwifi/ps.c b/drivers/net/wireless/rtlwifi/ps.c new file mode 100644 index 0000000..fd77cd5 --- /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 + * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, + * Hsinchu 300, Taiwan. + * + * Larry Finger + * + *****************************************************************************/ + +#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); + + /* */ + 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; + + /* + * + *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); +} diff --git a/drivers/net/wireless/rtlwifi/ps.h b/drivers/net/wireless/rtlwifi/ps.h new file mode 100644 index 0000000..ae56da8 --- /dev/null +++ b/drivers/net/wireless/rtlwifi/ps.h @@ -0,0 +1,43 @@ +/****************************************************************************** + * + * 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 + * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, + * Hsinchu 300, Taiwan. + * + * Larry Finger + * + *****************************************************************************/ + +#ifndef __REALTEK_RTL_PCI_PS_H__ +#define __REALTEK_RTL_PCI_PS_H__ + +bool rtl_ps_set_rf_state(struct ieee80211_hw *hw, + enum rf_pwrstate state_toset, u32 changesource, + bool protect_or_not); +bool rtl_ps_enable_nic(struct ieee80211_hw *hw); +bool rtl_ps_disable_nic(struct ieee80211_hw *hw); +void rtl_ips_nic_off(struct ieee80211_hw *hw); +void rtl_ips_nic_on(struct ieee80211_hw *hw); +void rtl_ips_nic_off_wq_callback(void *data); +void rtl_lps_enter(struct ieee80211_hw *hw); +void rtl_lps_leave(struct ieee80211_hw *hw); +#endif -- 1.7.1