// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
 *
 ******************************************************************************/
#include <drv_types.h>
#include <rtw_debug.h>
#include <hal_data.h>
#include <linux/jiffies.h>


void _ips_enter(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);

        pwrpriv->bips_processing = true;

        /*  syn ips_mode with request */
        pwrpriv->ips_mode = pwrpriv->ips_mode_req;

        pwrpriv->ips_enter_cnts++;

        if (rf_off == pwrpriv->change_rfpwrstate) {
                pwrpriv->bpower_saving = true;

                if (pwrpriv->ips_mode == IPS_LEVEL_2)
                        pwrpriv->bkeepfwalive = true;

                rtw_ips_pwr_down(padapter);
                pwrpriv->rf_pwrstate = rf_off;
        }
        pwrpriv->bips_processing = false;

}

void ips_enter(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);


        hal_btcoex_IpsNotify(padapter, pwrpriv->ips_mode_req);

        mutex_lock(&pwrpriv->lock);
        _ips_enter(padapter);
        mutex_unlock(&pwrpriv->lock);
}

int _ips_leave(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        int result = _SUCCESS;

        if ((pwrpriv->rf_pwrstate == rf_off) && (!pwrpriv->bips_processing)) {
                pwrpriv->bips_processing = true;
                pwrpriv->change_rfpwrstate = rf_on;
                pwrpriv->ips_leave_cnts++;

                result = rtw_ips_pwr_up(padapter);
                if (result == _SUCCESS) {
                        pwrpriv->rf_pwrstate = rf_on;
                }
                pwrpriv->bips_processing = false;

                pwrpriv->bkeepfwalive = false;
                pwrpriv->bpower_saving = false;
        }

        return result;
}

int ips_leave(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        int ret;

        if (!is_primary_adapter(padapter))
                return _SUCCESS;

        mutex_lock(&pwrpriv->lock);
        ret = _ips_leave(padapter);
        mutex_unlock(&pwrpriv->lock);

        if (ret == _SUCCESS)
                hal_btcoex_IpsNotify(padapter, IPS_NONE);

        return ret;
}

static bool rtw_pwr_unassociated_idle(struct adapter *adapter)
{
        struct adapter *buddy = adapter->pbuddy_adapter;
        struct mlme_priv *pmlmepriv = &(adapter->mlmepriv);
        struct xmit_priv *pxmit_priv = &adapter->xmitpriv;

        bool ret = false;

        if (adapter_to_pwrctl(adapter)->bpower_saving)
                goto exit;

        if (time_before(jiffies, adapter_to_pwrctl(adapter)->ips_deny_time))
                goto exit;

        if (check_fwstate(pmlmepriv, WIFI_ASOC_STATE|WIFI_SITE_MONITOR)
                || check_fwstate(pmlmepriv, WIFI_UNDER_LINKING|WIFI_UNDER_WPS)
                || check_fwstate(pmlmepriv, WIFI_AP_STATE)
                || check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE|WIFI_ADHOC_STATE)
        )
                goto exit;

        /* consider buddy, if exist */
        if (buddy) {
                struct mlme_priv *b_pmlmepriv = &(buddy->mlmepriv);

                if (check_fwstate(b_pmlmepriv, WIFI_ASOC_STATE|WIFI_SITE_MONITOR)
                        || check_fwstate(b_pmlmepriv, WIFI_UNDER_LINKING|WIFI_UNDER_WPS)
                        || check_fwstate(b_pmlmepriv, WIFI_AP_STATE)
                        || check_fwstate(b_pmlmepriv, WIFI_ADHOC_MASTER_STATE|WIFI_ADHOC_STATE)
                )
                        goto exit;
        }

        if (pxmit_priv->free_xmitbuf_cnt != NR_XMITBUFF ||
                pxmit_priv->free_xmit_extbuf_cnt != NR_XMIT_EXTBUFF) {
                netdev_dbg(adapter->pnetdev,
                           "There are some pkts to transmit\n");
                netdev_dbg(adapter->pnetdev,
                           "free_xmitbuf_cnt: %d, free_xmit_extbuf_cnt: %d\n",
                           pxmit_priv->free_xmitbuf_cnt,
                           pxmit_priv->free_xmit_extbuf_cnt);
                goto exit;
        }

        ret = true;

exit:
        return ret;
}


/*
 * ATTENTION:
 *rtw_ps_processor() doesn't handle LPS.
 */
void rtw_ps_processor(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        struct dvobj_priv *psdpriv = padapter->dvobj;
        struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;
        u32 ps_deny = 0;

        mutex_lock(&adapter_to_pwrctl(padapter)->lock);
        ps_deny = rtw_ps_deny_get(padapter);
        mutex_unlock(&adapter_to_pwrctl(padapter)->lock);
        if (ps_deny != 0)
                goto exit;

        if (pwrpriv->bInSuspend) {/* system suspend or autosuspend */
                pdbgpriv->dbg_ps_insuspend_cnt++;
                return;
        }

        pwrpriv->ps_processing = true;

        if (pwrpriv->ips_mode_req == IPS_NONE)
                goto exit;

        if (!rtw_pwr_unassociated_idle(padapter))
                goto exit;

        if ((pwrpriv->rf_pwrstate == rf_on) && ((pwrpriv->pwr_state_check_cnts%4) == 0)) {
                pwrpriv->change_rfpwrstate = rf_off;
                {
                        ips_enter(padapter);
                }
        }
exit:
        pwrpriv->ps_processing = false;
}

static void pwr_state_check_handler(struct timer_list *t)
{
        struct pwrctrl_priv *pwrctrlpriv =
                from_timer(pwrctrlpriv, t, pwr_state_check_timer);
        struct adapter *padapter = pwrctrlpriv->adapter;

        rtw_ps_cmd(padapter);
}

void traffic_check_for_leave_lps(struct adapter *padapter, u8 tx, u32 tx_packets)
{
        static unsigned long start_time;
        static u32 xmit_cnt;
        u8 bLeaveLPS = false;
        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;



        if (tx) { /* from tx */
                xmit_cnt += tx_packets;

                if (start_time == 0)
                        start_time = jiffies;

                if (jiffies_to_msecs(jiffies - start_time) > 2000) { /*  2 sec == watch dog timer */
                        if (xmit_cnt > 8) {
                                if (adapter_to_pwrctl(padapter)->bLeisurePs
                                    && (adapter_to_pwrctl(padapter)->pwr_mode != PS_MODE_ACTIVE)
                                    && !(hal_btcoex_IsBtControlLps(padapter))) {
                                        bLeaveLPS = true;
                                }
                        }

                        start_time = jiffies;
                        xmit_cnt = 0;
                }

        } else { /*  from rx path */
                if (pmlmepriv->LinkDetectInfo.NumRxUnicastOkInPeriod > 4/*2*/) {
                        if (adapter_to_pwrctl(padapter)->bLeisurePs
                            && (adapter_to_pwrctl(padapter)->pwr_mode != PS_MODE_ACTIVE)
                            && !(hal_btcoex_IsBtControlLps(padapter)))
                                bLeaveLPS = true;
                }
        }

        if (bLeaveLPS)
                /* rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_LEAVE, 1); */
                rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_LEAVE, tx?0:1);
}

/*
 * Description:
 *This function MUST be called under power lock protect
 *
 * Parameters
 *padapter
 *pslv                  power state level, only could be PS_STATE_S0 ~ PS_STATE_S4
 *
 */
void rtw_set_rpwm(struct adapter *padapter, u8 pslv)
{
        u8 rpwm;
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        u8 cpwm_orig;

        pslv = PS_STATE(pslv);

        if (!pwrpriv->brpwmtimeout) {
                if (pwrpriv->rpwm == pslv ||
                    (pwrpriv->rpwm >= PS_STATE_S2 && pslv >= PS_STATE_S2))
                        return;

        }

        if ((padapter->bSurpriseRemoved) || !(padapter->hw_init_completed)) {
                pwrpriv->cpwm = PS_STATE_S4;

                return;
        }

        if (padapter->bDriverStopped) {
                if (pslv < PS_STATE_S2)
                        return;
        }

        rpwm = pslv | pwrpriv->tog;
        /*  only when from PS_STATE S0/S1 to S2 and higher needs ACK */
        if ((pwrpriv->cpwm < PS_STATE_S2) && (pslv >= PS_STATE_S2))
                rpwm |= PS_ACK;

        pwrpriv->rpwm = pslv;

        cpwm_orig = 0;
        if (rpwm & PS_ACK)
                rtw_hal_get_hwreg(padapter, HW_VAR_CPWM, &cpwm_orig);

        if (rpwm & PS_ACK)
                _set_timer(&pwrpriv->pwr_rpwm_timer, LPS_RPWM_WAIT_MS);
        rtw_hal_set_hwreg(padapter, HW_VAR_SET_RPWM, (u8 *)(&rpwm));

        pwrpriv->tog += 0x80;

        /*  No LPS 32K, No Ack */
        if (rpwm & PS_ACK) {
                unsigned long start_time;
                u8 cpwm_now;
                u8 poll_cnt = 0;

                start_time = jiffies;

                /*  polling cpwm */
                do {
                        mdelay(1);
                        poll_cnt++;
                        rtw_hal_get_hwreg(padapter, HW_VAR_CPWM, &cpwm_now);
                        if ((cpwm_orig ^ cpwm_now) & 0x80) {
                                pwrpriv->cpwm = PS_STATE_S4;
                                pwrpriv->cpwm_tog = cpwm_now & PS_TOGGLE;
                                break;
                        }

                        if (jiffies_to_msecs(jiffies - start_time) > LPS_RPWM_WAIT_MS) {
                                _set_timer(&pwrpriv->pwr_rpwm_timer, 1);
                                break;
                        }
                } while (1);
        } else
                pwrpriv->cpwm = pslv;
}

static u8 PS_RDY_CHECK(struct adapter *padapter)
{
        unsigned long curr_time, delta_time;
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);

        if (pwrpriv->bInSuspend)
                return false;

        curr_time = jiffies;

        delta_time = curr_time - pwrpriv->DelayLPSLastTimeStamp;

        if (delta_time < LPS_DELAY_TIME)
                return false;

        if (check_fwstate(pmlmepriv, WIFI_SITE_MONITOR)
                || check_fwstate(pmlmepriv, WIFI_UNDER_LINKING|WIFI_UNDER_WPS)
                || check_fwstate(pmlmepriv, WIFI_AP_STATE)
                || check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE|WIFI_ADHOC_STATE)
                || rtw_is_scan_deny(padapter)
        )
                return false;

        if (padapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X &&
            !padapter->securitypriv.binstallGrpkey)
                return false;

        if (!rtw_cfg80211_pwr_mgmt(padapter))
                return false;

        return true;
}

void rtw_set_ps_mode(struct adapter *padapter, u8 ps_mode, u8 smart_ps, u8 bcn_ant_mode, const char *msg)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);

        if (ps_mode > PM_Card_Disable)
                return;

        if (pwrpriv->pwr_mode == ps_mode)
                if (ps_mode == PS_MODE_ACTIVE)
                        return;


        mutex_lock(&pwrpriv->lock);

        /* if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) */
        if (ps_mode == PS_MODE_ACTIVE) {
                if (!(hal_btcoex_IsBtControlLps(padapter))
                                || (hal_btcoex_IsBtControlLps(padapter)
                                        && !(hal_btcoex_IsLpsOn(padapter)))) {
                        pwrpriv->pwr_mode = ps_mode;
                        rtw_set_rpwm(padapter, PS_STATE_S4);

                        rtw_hal_set_hwreg(padapter, HW_VAR_H2C_FW_PWRMODE, (u8 *)(&ps_mode));
                        pwrpriv->fw_current_in_ps_mode = false;

                        hal_btcoex_LpsNotify(padapter, ps_mode);
                }
        } else {
                if ((PS_RDY_CHECK(padapter) && check_fwstate(&padapter->mlmepriv, WIFI_ASOC_STATE)) ||
                    ((hal_btcoex_IsBtControlLps(padapter)) && (hal_btcoex_IsLpsOn(padapter)))
                        ) {
                        u8 pslv;

                        hal_btcoex_LpsNotify(padapter, ps_mode);

                        pwrpriv->fw_current_in_ps_mode = true;
                        pwrpriv->pwr_mode = ps_mode;
                        pwrpriv->smart_ps = smart_ps;
                        pwrpriv->bcn_ant_mode = bcn_ant_mode;
                        rtw_hal_set_hwreg(padapter, HW_VAR_H2C_FW_PWRMODE, (u8 *)(&ps_mode));

                        pslv = PS_STATE_S2;
                        if (pwrpriv->alives == 0)
                                pslv = PS_STATE_S0;

                        if (!(hal_btcoex_IsBtDisabled(padapter)) &&
                            (hal_btcoex_IsBtControlLps(padapter))) {
                                u8 val8;

                                val8 = hal_btcoex_LpsVal(padapter);
                                if (val8 & BIT(4))
                                        pslv = PS_STATE_S2;
                        }

                        rtw_set_rpwm(padapter, pslv);
                }
        }

        mutex_unlock(&pwrpriv->lock);
}

/*
 * Return:
 *0:    Leave OK
 *-1:   Timeout
 *-2:   Other error
 */
s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
{
        unsigned long start_time;
        u8 bAwake = false;
        s32 err = 0;


        start_time = jiffies;
        while (1) {
                rtw_hal_get_hwreg(padapter, HW_VAR_FWLPS_RF_ON, &bAwake);
                if (bAwake)
                        break;

                if (padapter->bSurpriseRemoved) {
                        err = -2;
                        break;
                }

                if (jiffies_to_msecs(jiffies - start_time) > delay_ms) {
                        err = -1;
                        break;
                }
                msleep(1);
        }

        return err;
}

/*  */
/*      Description: */
/*              Enter the leisure power save mode. */
/*  */
void LPS_Enter(struct adapter *padapter, const char *msg)
{
        struct dvobj_priv *dvobj = adapter_to_dvobj(padapter);
        struct pwrctrl_priv *pwrpriv = dvobj_to_pwrctl(dvobj);
        int n_assoc_iface = 0;
        char buf[32] = {0};

        if (hal_btcoex_IsBtControlLps(padapter))
                return;

        /* Skip lps enter request if number of assocated adapters is not 1 */
        if (check_fwstate(&(dvobj->padapters->mlmepriv), WIFI_ASOC_STATE))
                n_assoc_iface++;
        if (n_assoc_iface != 1)
                return;

        /* Skip lps enter request for adapter not port0 */
        if (get_iface_type(padapter) != IFACE_PORT0)
                return;

        if (!PS_RDY_CHECK(dvobj->padapters))
                return;

        if (pwrpriv->bLeisurePs) {
                /*  Idle for a while if we connect to AP a while ago. */
                if (pwrpriv->LpsIdleCount >= 2) { /*   4 Sec */
                        if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) {
                                scnprintf(buf, sizeof(buf), "WIFI-%s", msg);
                                pwrpriv->bpower_saving = true;
                                rtw_set_ps_mode(padapter, pwrpriv->power_mgnt, padapter->registrypriv.smart_ps, 0, buf);
                        }
                } else
                        pwrpriv->LpsIdleCount++;
        }
}

/*  */
/*      Description: */
/*              Leave the leisure power save mode. */
/*  */
void LPS_Leave(struct adapter *padapter, const char *msg)
{
#define LPS_LEAVE_TIMEOUT_MS 100

        struct dvobj_priv *dvobj = adapter_to_dvobj(padapter);
        struct pwrctrl_priv *pwrpriv = dvobj_to_pwrctl(dvobj);
        char buf[32] = {0};

        if (hal_btcoex_IsBtControlLps(padapter))
                return;

        if (pwrpriv->bLeisurePs) {
                if (pwrpriv->pwr_mode != PS_MODE_ACTIVE) {
                        scnprintf(buf, sizeof(buf), "WIFI-%s", msg);
                        rtw_set_ps_mode(padapter, PS_MODE_ACTIVE, 0, 0, buf);

                        if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
                                LPS_RF_ON_check(padapter, LPS_LEAVE_TIMEOUT_MS);
                }
        }

        pwrpriv->bpower_saving = false;
}

void LeaveAllPowerSaveModeDirect(struct adapter *Adapter)
{
        struct adapter *pri_padapter = GET_PRIMARY_ADAPTER(Adapter);
        struct mlme_priv *pmlmepriv = &(Adapter->mlmepriv);
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(Adapter);

        if (Adapter->bSurpriseRemoved)
                return;

        if (check_fwstate(pmlmepriv, _FW_LINKED)) { /* connect */

                if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
                        return;

                mutex_lock(&pwrpriv->lock);

                rtw_set_rpwm(Adapter, PS_STATE_S4);

                mutex_unlock(&pwrpriv->lock);

                rtw_lps_ctrl_wk_cmd(pri_padapter, LPS_CTRL_LEAVE, 0);
        } else {
                if (pwrpriv->rf_pwrstate == rf_off)
                        ips_leave(pri_padapter);
        }
}

/*  */
/*  Description: Leave all power save mode: LPS, FwLPS, IPS if needed. */
/*  Move code to function by tynli. 2010.03.26. */
/*  */
void LeaveAllPowerSaveMode(struct adapter *Adapter)
{
        struct dvobj_priv *dvobj = adapter_to_dvobj(Adapter);
        u8 enqueue = 0;
        int n_assoc_iface = 0;

        if (!Adapter->bup)
                return;

        if (Adapter->bSurpriseRemoved)
                return;

        if (check_fwstate(&(dvobj->padapters->mlmepriv), WIFI_ASOC_STATE))
                n_assoc_iface++;

        if (n_assoc_iface) { /* connect */
                enqueue = 1;

                rtw_lps_ctrl_wk_cmd(Adapter, LPS_CTRL_LEAVE, enqueue);

                LPS_Leave_check(Adapter);
        } else {
                if (adapter_to_pwrctl(Adapter)->rf_pwrstate == rf_off) {
                        ips_leave(Adapter);
                }
        }
}

void LPS_Leave_check(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrpriv;
        unsigned long   start_time;
        u8 bReady;

        pwrpriv = adapter_to_pwrctl(padapter);

        bReady = false;
        start_time = jiffies;

        cond_resched();

        while (1) {
                mutex_lock(&pwrpriv->lock);

                if (padapter->bSurpriseRemoved ||
                    !(padapter->hw_init_completed) ||
                    (pwrpriv->pwr_mode == PS_MODE_ACTIVE))
                        bReady = true;

                mutex_unlock(&pwrpriv->lock);

                if (bReady)
                        break;

                if (jiffies_to_msecs(jiffies - start_time) > 100)
                        break;

                msleep(1);
        }
}

/*
 * Caller:ISR handler...
 *
 * This will be called when CPWM interrupt is up.
 *
 * using to update cpwn of drv; and drv willl make a decision to up or down pwr level
 */
void cpwm_int_hdl(struct adapter *padapter, struct reportpwrstate_parm *preportpwrstate)
{
        struct pwrctrl_priv *pwrpriv;

        pwrpriv = adapter_to_pwrctl(padapter);

        mutex_lock(&pwrpriv->lock);

        if (pwrpriv->rpwm < PS_STATE_S2)
                goto exit;

        pwrpriv->cpwm = PS_STATE(preportpwrstate->state);
        pwrpriv->cpwm_tog = preportpwrstate->state & PS_TOGGLE;

        if (pwrpriv->cpwm >= PS_STATE_S2) {
                if (pwrpriv->alives & CMD_ALIVE)
                        complete(&padapter->cmdpriv.cmd_queue_comp);

                if (pwrpriv->alives & XMIT_ALIVE)
                        complete(&padapter->xmitpriv.xmit_comp);
        }

exit:
        mutex_unlock(&pwrpriv->lock);

}

static void cpwm_event_callback(struct work_struct *work)
{
        struct pwrctrl_priv *pwrpriv = container_of(work, struct pwrctrl_priv, cpwm_event);
        struct dvobj_priv *dvobj = pwrctl_to_dvobj(pwrpriv);
        struct adapter *adapter = dvobj->if1;
        struct reportpwrstate_parm report;

        report.state = PS_STATE_S2;
        cpwm_int_hdl(adapter, &report);
}

static void rpwmtimeout_workitem_callback(struct work_struct *work)
{
        struct adapter *padapter;
        struct dvobj_priv *dvobj;
        struct pwrctrl_priv *pwrpriv;


        pwrpriv = container_of(work, struct pwrctrl_priv, rpwmtimeoutwi);
        dvobj = pwrctl_to_dvobj(pwrpriv);
        padapter = dvobj->if1;

        mutex_lock(&pwrpriv->lock);
        if ((pwrpriv->rpwm == pwrpriv->cpwm) || (pwrpriv->cpwm >= PS_STATE_S2))
                goto exit;

        mutex_unlock(&pwrpriv->lock);

        if (rtw_read8(padapter, 0x100) != 0xEA) {
                struct reportpwrstate_parm report;

                report.state = PS_STATE_S2;
                cpwm_int_hdl(padapter, &report);

                return;
        }

        mutex_lock(&pwrpriv->lock);

        if ((pwrpriv->rpwm == pwrpriv->cpwm) || (pwrpriv->cpwm >= PS_STATE_S2))
                goto exit;

        pwrpriv->brpwmtimeout = true;
        rtw_set_rpwm(padapter, pwrpriv->rpwm);
        pwrpriv->brpwmtimeout = false;

exit:
        mutex_unlock(&pwrpriv->lock);
}

/*
 * This function is a timer handler, can't do any IO in it.
 */
static void pwr_rpwm_timeout_handler(struct timer_list *t)
{
        struct pwrctrl_priv *pwrpriv = from_timer(pwrpriv, t, pwr_rpwm_timer);

        if ((pwrpriv->rpwm == pwrpriv->cpwm) || (pwrpriv->cpwm >= PS_STATE_S2))
                return;

        _set_workitem(&pwrpriv->rpwmtimeoutwi);
}

static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, u32 tag)
{
        pwrctrl->alives |= tag;
}

static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, u32 tag)
{
        pwrctrl->alives &= ~tag;
}


/*
 * Description:
 *Check if the fw_pwrstate is okay for I/O.
 *If not (cpwm is less than S2), then the sub-routine
 *will raise the cpwm to be greater than or equal to S2.
 *
 *Calling Context: Passive
 *
 *Constraint:
 *      1. this function will request pwrctrl->lock
 *
 * Return Value:
 *_SUCCESS      hardware is ready for I/O
 *_FAIL         can't I/O right now
 */
s32 rtw_register_task_alive(struct adapter *padapter, u32 task)
{
        s32 res;
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        res = _SUCCESS;
        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S2;

        mutex_lock(&pwrctrl->lock);

        register_task_alive(pwrctrl, task);

        if (pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm < pslv) {
                        if (pwrctrl->cpwm < PS_STATE_S2)
                                res = _FAIL;
                        if (pwrctrl->rpwm < pslv)
                                rtw_set_rpwm(padapter, pslv);
                }
        }

        mutex_unlock(&pwrctrl->lock);

        if (res == _FAIL)
                if (pwrctrl->cpwm >= PS_STATE_S2)
                        res = _SUCCESS;

        return res;
}

/*
 * Description:
 *If task is done, call this func. to power down firmware again.
 *
 *Constraint:
 *      1. this function will request pwrctrl->lock
 *
 * Return Value:
 *none
 */
void rtw_unregister_task_alive(struct adapter *padapter, u32 task)
{
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S0;

        if (!(hal_btcoex_IsBtDisabled(padapter)) && hal_btcoex_IsBtControlLps(padapter)) {
                u8 val8;

                val8 = hal_btcoex_LpsVal(padapter);
                if (val8 & BIT(4))
                        pslv = PS_STATE_S2;
        }

        mutex_lock(&pwrctrl->lock);

        unregister_task_alive(pwrctrl, task);

        if ((pwrctrl->pwr_mode != PS_MODE_ACTIVE) && pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm > pslv)
                        if ((pslv >= PS_STATE_S2) || (pwrctrl->alives == 0))
                                rtw_set_rpwm(padapter, pslv);

        }

        mutex_unlock(&pwrctrl->lock);
}

/*
 * Caller: rtw_xmit_thread
 *
 * Check if the fw_pwrstate is okay for xmit.
 * If not (cpwm is less than S3), then the sub-routine
 * will raise the cpwm to be greater than or equal to S3.
 *
 * Calling Context: Passive
 *
 * Return Value:
 * _SUCCESS     rtw_xmit_thread can write fifo/txcmd afterwards.
 * _FAIL                rtw_xmit_thread can not do anything.
 */
s32 rtw_register_tx_alive(struct adapter *padapter)
{
        s32 res;
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        res = _SUCCESS;
        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S2;

        mutex_lock(&pwrctrl->lock);

        register_task_alive(pwrctrl, XMIT_ALIVE);

        if (pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm < pslv) {
                        if (pwrctrl->cpwm < PS_STATE_S2)
                                res = _FAIL;
                        if (pwrctrl->rpwm < pslv)
                                rtw_set_rpwm(padapter, pslv);
                }
        }

        mutex_unlock(&pwrctrl->lock);

        if (res == _FAIL)
                if (pwrctrl->cpwm >= PS_STATE_S2)
                        res = _SUCCESS;

        return res;
}

/*
 * Caller: rtw_cmd_thread
 *
 * Check if the fw_pwrstate is okay for issuing cmd.
 * If not (cpwm should be is less than S2), then the sub-routine
 * will raise the cpwm to be greater than or equal to S2.
 *
 * Calling Context: Passive
 *
 * Return Value:
 *_SUCCESS      rtw_cmd_thread can issue cmds to firmware afterwards.
 *_FAIL         rtw_cmd_thread can not do anything.
 */
s32 rtw_register_cmd_alive(struct adapter *padapter)
{
        s32 res;
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        res = _SUCCESS;
        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S2;

        mutex_lock(&pwrctrl->lock);

        register_task_alive(pwrctrl, CMD_ALIVE);

        if (pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm < pslv) {
                        if (pwrctrl->cpwm < PS_STATE_S2)
                                res = _FAIL;
                        if (pwrctrl->rpwm < pslv)
                                rtw_set_rpwm(padapter, pslv);
                }
        }

        mutex_unlock(&pwrctrl->lock);

        if (res == _FAIL)
                if (pwrctrl->cpwm >= PS_STATE_S2)
                        res = _SUCCESS;

        return res;
}

/*
 * Caller: ISR
 *
 * If ISR's txdone,
 * No more pkts for TX,
 * Then driver shall call this fun. to power down firmware again.
 */
void rtw_unregister_tx_alive(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S0;

        if (!(hal_btcoex_IsBtDisabled(padapter)) && hal_btcoex_IsBtControlLps(padapter)) {
                u8 val8;

                val8 = hal_btcoex_LpsVal(padapter);
                if (val8 & BIT(4))
                        pslv = PS_STATE_S2;
        }

        mutex_lock(&pwrctrl->lock);

        unregister_task_alive(pwrctrl, XMIT_ALIVE);

        if ((pwrctrl->pwr_mode != PS_MODE_ACTIVE) && pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm > pslv)
                        if ((pslv >= PS_STATE_S2) || (pwrctrl->alives == 0))
                                rtw_set_rpwm(padapter, pslv);
        }

        mutex_unlock(&pwrctrl->lock);
}

/*
 * Caller: ISR
 *
 * If all commands have been done,
 * and no more command to do,
 * then driver shall call this fun. to power down firmware again.
 */
void rtw_unregister_cmd_alive(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrctrl;
        u8 pslv;

        pwrctrl = adapter_to_pwrctl(padapter);
        pslv = PS_STATE_S0;

        if (!(hal_btcoex_IsBtDisabled(padapter)) && hal_btcoex_IsBtControlLps(padapter)) {
                u8 val8;

                val8 = hal_btcoex_LpsVal(padapter);
                if (val8 & BIT(4))
                        pslv = PS_STATE_S2;
        }

        mutex_lock(&pwrctrl->lock);

        unregister_task_alive(pwrctrl, CMD_ALIVE);

        if ((pwrctrl->pwr_mode != PS_MODE_ACTIVE) && pwrctrl->fw_current_in_ps_mode) {
                if (pwrctrl->cpwm > pslv) {
                        if ((pslv >= PS_STATE_S2) || (pwrctrl->alives == 0))
                                rtw_set_rpwm(padapter, pslv);
                }
        }

        mutex_unlock(&pwrctrl->lock);
}

void rtw_init_pwrctrl_priv(struct adapter *padapter)
{
        struct pwrctrl_priv *pwrctrlpriv = adapter_to_pwrctl(padapter);

        mutex_init(&pwrctrlpriv->lock);
        pwrctrlpriv->rf_pwrstate = rf_on;
        pwrctrlpriv->ips_enter_cnts = 0;
        pwrctrlpriv->ips_leave_cnts = 0;
        pwrctrlpriv->bips_processing = false;

        pwrctrlpriv->ips_mode = padapter->registrypriv.ips_mode;
        pwrctrlpriv->ips_mode_req = padapter->registrypriv.ips_mode;

        pwrctrlpriv->pwr_state_check_interval = RTW_PWR_STATE_CHK_INTERVAL;
        pwrctrlpriv->pwr_state_check_cnts = 0;
        pwrctrlpriv->bInternalAutoSuspend = false;
        pwrctrlpriv->bInSuspend = false;
        pwrctrlpriv->bkeepfwalive = false;

        pwrctrlpriv->LpsIdleCount = 0;
        pwrctrlpriv->power_mgnt = padapter->registrypriv.power_mgnt;/*  PS_MODE_MIN; */
        pwrctrlpriv->bLeisurePs = pwrctrlpriv->power_mgnt != PS_MODE_ACTIVE;

        pwrctrlpriv->fw_current_in_ps_mode = false;

        pwrctrlpriv->rpwm = 0;
        pwrctrlpriv->cpwm = PS_STATE_S4;

        pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
        pwrctrlpriv->smart_ps = padapter->registrypriv.smart_ps;
        pwrctrlpriv->bcn_ant_mode = 0;
        pwrctrlpriv->dtim = 0;

        pwrctrlpriv->tog = 0x80;

        rtw_hal_set_hwreg(padapter, HW_VAR_SET_RPWM, (u8 *)(&pwrctrlpriv->rpwm));

        _init_workitem(&pwrctrlpriv->cpwm_event, cpwm_event_callback, NULL);

        pwrctrlpriv->brpwmtimeout = false;
        pwrctrlpriv->adapter = padapter;
        _init_workitem(&pwrctrlpriv->rpwmtimeoutwi, rpwmtimeout_workitem_callback, NULL);

        timer_setup(&pwrctrlpriv->pwr_rpwm_timer, pwr_rpwm_timeout_handler, 0);
        timer_setup(&pwrctrlpriv->pwr_state_check_timer,
                    pwr_state_check_handler, 0);

        pwrctrlpriv->wowlan_mode = false;
        pwrctrlpriv->wowlan_ap_mode = false;
}


void rtw_free_pwrctrl_priv(struct adapter *adapter)
{
}

inline void rtw_set_ips_deny(struct adapter *padapter, u32 ms)
{
        struct pwrctrl_priv *pwrpriv = adapter_to_pwrctl(padapter);
        pwrpriv->ips_deny_time = jiffies + msecs_to_jiffies(ms);
}

/*
* rtw_pwr_wakeup - Wake the NIC up from: 1)IPS. 2)USB autosuspend
* @adapter: pointer to struct adapter structure
* @ips_deffer_ms: the ms will prevent from falling into IPS after wakeup
* Return _SUCCESS or _FAIL
*/

int _rtw_pwr_wakeup(struct adapter *padapter, u32 ips_deffer_ms, const char *caller)
{
        struct dvobj_priv *dvobj = adapter_to_dvobj(padapter);
        struct pwrctrl_priv *pwrpriv = dvobj_to_pwrctl(dvobj);
        struct mlme_priv *pmlmepriv;
        int ret = _SUCCESS;
        unsigned long start = jiffies;
        unsigned long deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);

        /* for LPS */
        LeaveAllPowerSaveMode(padapter);

        /* IPS still bound with primary adapter */
        padapter = GET_PRIMARY_ADAPTER(padapter);
        pmlmepriv = &padapter->mlmepriv;

        if (time_before(pwrpriv->ips_deny_time, deny_time))
                pwrpriv->ips_deny_time = deny_time;


        if (pwrpriv->ps_processing)
                while (pwrpriv->ps_processing && jiffies_to_msecs(jiffies - start) <= 3000)
                        mdelay(10);

        if (!(pwrpriv->bInternalAutoSuspend) && pwrpriv->bInSuspend)
                while (pwrpriv->bInSuspend && jiffies_to_msecs(jiffies - start) <= 3000
                )
                        mdelay(10);

        /* System suspend is not allowed to wakeup */
        if (!(pwrpriv->bInternalAutoSuspend) && pwrpriv->bInSuspend) {
                ret = _FAIL;
                goto exit;
        }

        /* block??? */
        if (pwrpriv->bInternalAutoSuspend  && padapter->net_closed) {
                ret = _FAIL;
                goto exit;
        }

        /* I think this should be check in IPS, LPS, autosuspend functions... */
        if (check_fwstate(pmlmepriv, _FW_LINKED)) {
                ret = _SUCCESS;
                goto exit;
        }

        if (rf_off == pwrpriv->rf_pwrstate) {
                {
                        if (ips_leave(padapter) == _FAIL) {
                                ret = _FAIL;
                                goto exit;
                        }
                }
        }

        /* TODO: the following checking need to be merged... */
        if (padapter->bDriverStopped || !padapter->bup || !padapter->hw_init_completed) {
                ret = false;
                goto exit;
        }

exit:
        deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);
        if (time_before(pwrpriv->ips_deny_time, deny_time))
                pwrpriv->ips_deny_time = deny_time;
        return ret;

}

int rtw_pm_set_lps(struct adapter *padapter, u8 mode)
{
        int     ret = 0;
        struct pwrctrl_priv *pwrctrlpriv = adapter_to_pwrctl(padapter);

        if (mode < PS_MODE_NUM) {
                if (pwrctrlpriv->power_mgnt != mode) {
                        if (mode == PS_MODE_ACTIVE)
                                LeaveAllPowerSaveMode(padapter);
                        else
                                pwrctrlpriv->LpsIdleCount = 2;

                        pwrctrlpriv->power_mgnt = mode;
                        pwrctrlpriv->bLeisurePs =
                                pwrctrlpriv->power_mgnt != PS_MODE_ACTIVE;
                }
        } else
                ret = -EINVAL;

        return ret;
}

int rtw_pm_set_ips(struct adapter *padapter, u8 mode)
{
        struct pwrctrl_priv *pwrctrlpriv = adapter_to_pwrctl(padapter);

        if (mode == IPS_NORMAL || mode == IPS_LEVEL_2) {
                rtw_ips_mode_req(pwrctrlpriv, mode);
                return 0;
        } else if (mode == IPS_NONE) {
                rtw_ips_mode_req(pwrctrlpriv, mode);
                if ((padapter->bSurpriseRemoved == 0) && (rtw_pwr_wakeup(padapter) == _FAIL))
                        return -EFAULT;
        } else
                return -EINVAL;

        return 0;
}

/*
 * ATTENTION:
 *This function will request pwrctrl LOCK!
 */
void rtw_ps_deny(struct adapter *padapter, enum ps_deny_reason reason)
{
        struct pwrctrl_priv *pwrpriv;

        pwrpriv = adapter_to_pwrctl(padapter);

        mutex_lock(&pwrpriv->lock);
        pwrpriv->ps_deny |= BIT(reason);
        mutex_unlock(&pwrpriv->lock);
}

/*
 * ATTENTION:
 *This function will request pwrctrl LOCK!
 */
void rtw_ps_deny_cancel(struct adapter *padapter, enum ps_deny_reason reason)
{
        struct pwrctrl_priv *pwrpriv;

        pwrpriv = adapter_to_pwrctl(padapter);

        mutex_lock(&pwrpriv->lock);
        pwrpriv->ps_deny &= ~BIT(reason);
        mutex_unlock(&pwrpriv->lock);
}

/*
 * ATTENTION:
 *Before calling this function pwrctrl lock should be occupied already,
 *otherwise it may return incorrect value.
 */
u32 rtw_ps_deny_get(struct adapter *padapter)
{
        return adapter_to_pwrctl(padapter)->ps_deny;
}