/******************************************************************************
*
* 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 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_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->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->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_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
enum rf_pwrstate rtstate;
unsigned long flags;
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->leisure_ps) &&
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 && ppsc->leisure_ps))
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);
if (ppsc->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->fwctrl_lps && ppsc->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);
}
