linux/drivers/staging/rtl8188eu/core/rtw_pwrctrl.c
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   1/******************************************************************************
   2 *
   3 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of version 2 of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12 * more details.
  13 *
  14 ******************************************************************************/
  15#define _RTW_PWRCTRL_C_
  16
  17#include <osdep_service.h>
  18#include <drv_types.h>
  19#include <osdep_intf.h>
  20#include <usb_ops_linux.h>
  21#include <linux/usb.h>
  22
  23static int rtw_hw_suspend(struct adapter *padapter)
  24{
  25        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
  26        struct net_device *pnetdev = padapter->pnetdev;
  27
  28
  29        if ((!padapter->bup) || (padapter->bDriverStopped) ||
  30            (padapter->bSurpriseRemoved)) {
  31                DBG_88E("padapter->bup=%d bDriverStopped=%d bSurpriseRemoved = %d\n",
  32                        padapter->bup, padapter->bDriverStopped,
  33                        padapter->bSurpriseRemoved);
  34                goto error_exit;
  35        }
  36
  37        /* system suspend */
  38        LeaveAllPowerSaveMode(padapter);
  39
  40        DBG_88E("==> rtw_hw_suspend\n");
  41        mutex_lock(&pwrpriv->mutex_lock);
  42        pwrpriv->bips_processing = true;
  43        /* s1. */
  44        if (pnetdev) {
  45                netif_carrier_off(pnetdev);
  46                netif_tx_stop_all_queues(pnetdev);
  47        }
  48
  49        /* s2. */
  50        rtw_disassoc_cmd(padapter, 500, false);
  51
  52        /* s2-2.  indicate disconnect to os */
  53        {
  54                struct  mlme_priv *pmlmepriv = &padapter->mlmepriv;
  55
  56                if (check_fwstate(pmlmepriv, _FW_LINKED)) {
  57                        _clr_fwstate_(pmlmepriv, _FW_LINKED);
  58
  59                        rtw_led_control(padapter, LED_CTL_NO_LINK);
  60
  61                        rtw_os_indicate_disconnect(padapter);
  62
  63                        /* donnot enqueue cmd */
  64                        rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 0);
  65                }
  66        }
  67        /* s2-3. */
  68        rtw_free_assoc_resources(padapter);
  69
  70        /* s2-4. */
  71        rtw_free_network_queue(padapter, true);
  72        rtw_ips_dev_unload(padapter);
  73        pwrpriv->rf_pwrstate = rf_off;
  74        pwrpriv->bips_processing = false;
  75
  76        mutex_unlock(&pwrpriv->mutex_lock);
  77
  78        return 0;
  79
  80error_exit:
  81        DBG_88E("%s, failed\n", __func__);
  82        return -1;
  83}
  84
  85static int rtw_hw_resume(struct adapter *padapter)
  86{
  87        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
  88        struct net_device *pnetdev = padapter->pnetdev;
  89
  90
  91        /* system resume */
  92        DBG_88E("==> rtw_hw_resume\n");
  93        mutex_lock(&pwrpriv->mutex_lock);
  94        pwrpriv->bips_processing = true;
  95        rtw_reset_drv_sw(padapter);
  96
  97        if (pm_netdev_open(pnetdev, false) != 0) {
  98                mutex_unlock(&pwrpriv->mutex_lock);
  99                goto error_exit;
 100        }
 101
 102        netif_device_attach(pnetdev);
 103        netif_carrier_on(pnetdev);
 104
 105        if (!netif_queue_stopped(pnetdev))
 106                netif_start_queue(pnetdev);
 107        else
 108                netif_wake_queue(pnetdev);
 109
 110        pwrpriv->bkeepfwalive = false;
 111        pwrpriv->brfoffbyhw = false;
 112
 113        pwrpriv->rf_pwrstate = rf_on;
 114        pwrpriv->bips_processing = false;
 115
 116        mutex_unlock(&pwrpriv->mutex_lock);
 117
 118
 119        return 0;
 120error_exit:
 121        DBG_88E("%s, Open net dev failed\n", __func__);
 122        return -1;
 123}
 124
 125void ips_enter(struct adapter *padapter)
 126{
 127        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 128        struct xmit_priv *pxmit_priv = &padapter->xmitpriv;
 129
 130        if (padapter->registrypriv.mp_mode == 1)
 131                return;
 132
 133        if (pxmit_priv->free_xmitbuf_cnt != NR_XMITBUFF ||
 134            pxmit_priv->free_xmit_extbuf_cnt != NR_XMIT_EXTBUFF) {
 135                DBG_88E_LEVEL(_drv_info_, "There are some pkts to transmit\n");
 136                DBG_88E_LEVEL(_drv_info_, "free_xmitbuf_cnt: %d, free_xmit_extbuf_cnt: %d\n",
 137                              pxmit_priv->free_xmitbuf_cnt, pxmit_priv->free_xmit_extbuf_cnt);
 138                return;
 139        }
 140
 141        mutex_lock(&pwrpriv->mutex_lock);
 142
 143        pwrpriv->bips_processing = true;
 144
 145        /*  syn ips_mode with request */
 146        pwrpriv->ips_mode = pwrpriv->ips_mode_req;
 147
 148        pwrpriv->ips_enter_cnts++;
 149        DBG_88E("==>ips_enter cnts:%d\n", pwrpriv->ips_enter_cnts);
 150        if (rf_off == pwrpriv->change_rfpwrstate) {
 151                pwrpriv->bpower_saving = true;
 152                DBG_88E_LEVEL(_drv_info_, "nolinked power save enter\n");
 153
 154                if (pwrpriv->ips_mode == IPS_LEVEL_2)
 155                        pwrpriv->bkeepfwalive = true;
 156
 157                rtw_ips_pwr_down(padapter);
 158                pwrpriv->rf_pwrstate = rf_off;
 159        }
 160        pwrpriv->bips_processing = false;
 161
 162        mutex_unlock(&pwrpriv->mutex_lock);
 163}
 164
 165int ips_leave(struct adapter *padapter)
 166{
 167        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 168        struct security_priv *psecuritypriv = &(padapter->securitypriv);
 169        struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
 170        int result = _SUCCESS;
 171        int keyid;
 172
 173
 174        mutex_lock(&pwrpriv->mutex_lock);
 175
 176        if ((pwrpriv->rf_pwrstate == rf_off) && (!pwrpriv->bips_processing)) {
 177                pwrpriv->bips_processing = true;
 178                pwrpriv->change_rfpwrstate = rf_on;
 179                pwrpriv->ips_leave_cnts++;
 180                DBG_88E("==>ips_leave cnts:%d\n", pwrpriv->ips_leave_cnts);
 181
 182                result = rtw_ips_pwr_up(padapter);
 183                if (result == _SUCCESS) {
 184                        pwrpriv->rf_pwrstate = rf_on;
 185                }
 186                DBG_88E_LEVEL(_drv_info_, "nolinked power save leave\n");
 187
 188                if ((_WEP40_ == psecuritypriv->dot11PrivacyAlgrthm) || (_WEP104_ == psecuritypriv->dot11PrivacyAlgrthm)) {
 189                        DBG_88E("==>%s, channel(%d), processing(%x)\n", __func__, padapter->mlmeextpriv.cur_channel, pwrpriv->bips_processing);
 190                        set_channel_bwmode(padapter, padapter->mlmeextpriv.cur_channel, HAL_PRIME_CHNL_OFFSET_DONT_CARE, HT_CHANNEL_WIDTH_20);
 191                        for (keyid = 0; keyid < 4; keyid++) {
 192                                if (pmlmepriv->key_mask & BIT(keyid)) {
 193                                        if (keyid == psecuritypriv->dot11PrivacyKeyIndex)
 194                                                result = rtw_set_key(padapter, psecuritypriv, keyid, 1);
 195                                        else
 196                                                result = rtw_set_key(padapter, psecuritypriv, keyid, 0);
 197                                }
 198                        }
 199                }
 200
 201                DBG_88E("==> ips_leave.....LED(0x%08x)...\n", usb_read32(padapter, 0x4c));
 202                pwrpriv->bips_processing = false;
 203
 204                pwrpriv->bkeepfwalive = false;
 205                pwrpriv->bpower_saving = false;
 206        }
 207
 208        mutex_unlock(&pwrpriv->mutex_lock);
 209
 210        return result;
 211}
 212
 213static bool rtw_pwr_unassociated_idle(struct adapter *adapter)
 214{
 215        struct mlme_priv *pmlmepriv = &(adapter->mlmepriv);
 216        bool ret = false;
 217
 218        if (time_after_eq(adapter->pwrctrlpriv.ips_deny_time, jiffies))
 219                goto exit;
 220
 221        if (check_fwstate(pmlmepriv, WIFI_ASOC_STATE|WIFI_SITE_MONITOR) ||
 222            check_fwstate(pmlmepriv, WIFI_UNDER_LINKING|WIFI_UNDER_WPS) ||
 223            check_fwstate(pmlmepriv, WIFI_AP_STATE) ||
 224            check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE|WIFI_ADHOC_STATE))
 225                goto exit;
 226
 227        ret = true;
 228
 229exit:
 230        return ret;
 231}
 232
 233void rtw_ps_processor(struct adapter *padapter)
 234{
 235        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 236        struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
 237        enum rt_rf_power_state rfpwrstate;
 238
 239        pwrpriv->ps_processing = true;
 240
 241        if (pwrpriv->bips_processing)
 242                goto exit;
 243
 244        if (padapter->pwrctrlpriv.bHWPwrPindetect) {
 245                rfpwrstate = RfOnOffDetect(padapter);
 246                DBG_88E("@@@@- #2  %s==> rfstate:%s\n", __func__, (rfpwrstate == rf_on) ? "rf_on" : "rf_off");
 247
 248                if (rfpwrstate != pwrpriv->rf_pwrstate) {
 249                        if (rfpwrstate == rf_off) {
 250                                pwrpriv->change_rfpwrstate = rf_off;
 251                                pwrpriv->brfoffbyhw = true;
 252                                rtw_hw_suspend(padapter);
 253                        } else {
 254                                pwrpriv->change_rfpwrstate = rf_on;
 255                                rtw_hw_resume(padapter);
 256                        }
 257                        DBG_88E("current rf_pwrstate(%s)\n", (pwrpriv->rf_pwrstate == rf_off) ? "rf_off" : "rf_on");
 258                }
 259                pwrpriv->pwr_state_check_cnts++;
 260        }
 261
 262        if (pwrpriv->ips_mode_req == IPS_NONE)
 263                goto exit;
 264
 265        if (!rtw_pwr_unassociated_idle(padapter))
 266                goto exit;
 267
 268        if ((pwrpriv->rf_pwrstate == rf_on) && ((pwrpriv->pwr_state_check_cnts%4) == 0)) {
 269                DBG_88E("==>%s .fw_state(%x)\n", __func__, get_fwstate(pmlmepriv));
 270                pwrpriv->change_rfpwrstate = rf_off;
 271
 272                ips_enter(padapter);
 273        }
 274exit:
 275        rtw_set_pwr_state_check_timer(&padapter->pwrctrlpriv);
 276        pwrpriv->ps_processing = false;
 277}
 278
 279static void pwr_state_check_handler(unsigned long data)
 280{
 281        struct adapter *padapter = (struct adapter *)data;
 282        rtw_ps_cmd(padapter);
 283}
 284
 285/*
 286 *
 287 * Parameters
 288 *      padapter
 289 *      pslv                    power state level, only could be PS_STATE_S0 ~ PS_STATE_S4
 290 *
 291 */
 292void rtw_set_rpwm(struct adapter *padapter, u8 pslv)
 293{
 294        u8      rpwm;
 295        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 296
 297        pslv = PS_STATE(pslv);
 298
 299        if (pwrpriv->btcoex_rfon) {
 300                if (pslv < PS_STATE_S4)
 301                        pslv = PS_STATE_S3;
 302        }
 303
 304        if ((pwrpriv->rpwm == pslv)) {
 305                RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 306                         ("%s: Already set rpwm[0x%02X], new=0x%02X!\n", __func__, pwrpriv->rpwm, pslv));
 307                return;
 308        }
 309
 310        if ((padapter->bSurpriseRemoved) ||
 311            (!padapter->hw_init_completed)) {
 312                RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 313                         ("%s: SurpriseRemoved(%d) hw_init_completed(%d)\n",
 314                         __func__, padapter->bSurpriseRemoved, padapter->hw_init_completed));
 315
 316                pwrpriv->cpwm = PS_STATE_S4;
 317
 318                return;
 319        }
 320
 321        if (padapter->bDriverStopped) {
 322                RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 323                         ("%s: change power state(0x%02X) when DriverStopped\n", __func__, pslv));
 324
 325                if (pslv < PS_STATE_S2) {
 326                        RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 327                                 ("%s: Reject to enter PS_STATE(0x%02X) lower than S2 when DriverStopped!!\n", __func__, pslv));
 328                        return;
 329                }
 330        }
 331
 332        rpwm = pslv | pwrpriv->tog;
 333        RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_notice_,
 334                 ("rtw_set_rpwm: rpwm=0x%02x cpwm=0x%02x\n", rpwm, pwrpriv->cpwm));
 335
 336        pwrpriv->rpwm = pslv;
 337
 338        rtw_hal_set_hwreg(padapter, HW_VAR_SET_RPWM, (u8 *)(&rpwm));
 339
 340        pwrpriv->tog += 0x80;
 341        pwrpriv->cpwm = pslv;
 342}
 343
 344static u8 PS_RDY_CHECK(struct adapter *padapter)
 345{
 346        unsigned long curr_time, delta_time;
 347        struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 348        struct mlme_priv        *pmlmepriv = &(padapter->mlmepriv);
 349
 350
 351        curr_time = jiffies;
 352        delta_time = curr_time - pwrpriv->DelayLPSLastTimeStamp;
 353
 354        if (delta_time < LPS_DELAY_TIME)
 355                return false;
 356
 357        if ((check_fwstate(pmlmepriv, _FW_LINKED) == false) ||
 358            (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY)) ||
 359            (check_fwstate(pmlmepriv, WIFI_AP_STATE)) ||
 360            (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) ||
 361            (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)))
 362                return false;
 363        if (pwrpriv->bInSuspend)
 364                return false;
 365        if ((padapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X) && (padapter->securitypriv.binstallGrpkey == false)) {
 366                DBG_88E("Group handshake still in progress !!!\n");
 367                return false;
 368        }
 369        return true;
 370}
 371
 372void rtw_set_ps_mode(struct adapter *padapter, u8 ps_mode, u8 smart_ps, u8 bcn_ant_mode)
 373{
 374        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 375
 376        RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_notice_,
 377                 ("%s: PowerMode=%d Smart_PS=%d\n",
 378                  __func__, ps_mode, smart_ps));
 379
 380        if (ps_mode > PM_Card_Disable) {
 381                RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_, ("ps_mode:%d error\n", ps_mode));
 382                return;
 383        }
 384
 385        if (pwrpriv->pwr_mode == ps_mode) {
 386                if (PS_MODE_ACTIVE == ps_mode)
 387                        return;
 388
 389                if ((pwrpriv->smart_ps == smart_ps) &&
 390                    (pwrpriv->bcn_ant_mode == bcn_ant_mode))
 391                        return;
 392        }
 393
 394        /* if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) */
 395        if (ps_mode == PS_MODE_ACTIVE) {
 396                if (PS_RDY_CHECK(padapter)) {
 397                        DBG_88E("%s: Enter 802.11 power save\n", __func__);
 398                        pwrpriv->bFwCurrentInPSMode = true;
 399                        pwrpriv->pwr_mode = ps_mode;
 400                        pwrpriv->smart_ps = smart_ps;
 401                        pwrpriv->bcn_ant_mode = bcn_ant_mode;
 402                        rtw_hal_set_hwreg(padapter, HW_VAR_H2C_FW_PWRMODE, (u8 *)(&ps_mode));
 403                        rtw_set_rpwm(padapter, PS_STATE_S2);
 404                }
 405        }
 406}
 407
 408/*
 409 * Return:
 410 *      0:      Leave OK
 411 *      -1:     Timeout
 412 *      -2:     Other error
 413 */
 414s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
 415{
 416        unsigned long start_time;
 417        u8 bAwake = false;
 418        s32 err = 0;
 419
 420
 421        start_time = jiffies;
 422        while (1) {
 423                rtw_hal_get_hwreg(padapter, HW_VAR_FWLPS_RF_ON, &bAwake);
 424                if (bAwake)
 425                        break;
 426
 427                if (padapter->bSurpriseRemoved) {
 428                        err = -2;
 429                        DBG_88E("%s: device surprise removed!!\n", __func__);
 430                        break;
 431                }
 432
 433                if (jiffies_to_msecs(jiffies - start_time) > delay_ms) {
 434                        err = -1;
 435                        DBG_88E("%s: Wait for FW LPS leave more than %u ms!!!\n", __func__, delay_ms);
 436                        break;
 437                }
 438                msleep(1);
 439        }
 440
 441        return err;
 442}
 443
 444/*  */
 445/*      Description: */
 446/*              Enter the leisure power save mode. */
 447/*  */
 448void LPS_Enter(struct adapter *padapter)
 449{
 450        struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 451
 452        if (PS_RDY_CHECK(padapter) == false)
 453                return;
 454
 455        if (pwrpriv->bLeisurePs) {
 456                /*  Idle for a while if we connect to AP a while ago. */
 457                if (pwrpriv->LpsIdleCount >= 2) { /*   4 Sec */
 458                        if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) {
 459                                pwrpriv->bpower_saving = true;
 460                                DBG_88E("%s smart_ps:%d\n", __func__, pwrpriv->smart_ps);
 461                                /* For Tenda W311R IOT issue */
 462                                rtw_set_ps_mode(padapter, pwrpriv->power_mgnt, pwrpriv->smart_ps, 0);
 463                        }
 464                } else {
 465                        pwrpriv->LpsIdleCount++;
 466                }
 467        }
 468}
 469
 470#define LPS_LEAVE_TIMEOUT_MS 100
 471
 472/*      Description: */
 473/*              Leave the leisure power save mode. */
 474void LPS_Leave(struct adapter *padapter)
 475{
 476        struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 477
 478        if (pwrpriv->bLeisurePs) {
 479                if (pwrpriv->pwr_mode != PS_MODE_ACTIVE) {
 480                        rtw_set_ps_mode(padapter, PS_MODE_ACTIVE, 0, 0);
 481
 482                        if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
 483                                LPS_RF_ON_check(padapter, LPS_LEAVE_TIMEOUT_MS);
 484                }
 485        }
 486
 487        pwrpriv->bpower_saving = false;
 488}
 489
 490/*  */
 491/*  Description: Leave all power save mode: LPS, FwLPS, IPS if needed. */
 492/*  Move code to function by tynli. 2010.03.26. */
 493/*  */
 494void LeaveAllPowerSaveMode(struct adapter *Adapter)
 495{
 496        struct mlme_priv        *pmlmepriv = &(Adapter->mlmepriv);
 497        u8      enqueue = 0;
 498
 499        if (check_fwstate(pmlmepriv, _FW_LINKED))
 500                rtw_lps_ctrl_wk_cmd(Adapter, LPS_CTRL_LEAVE, enqueue);
 501}
 502
 503void rtw_init_pwrctrl_priv(struct adapter *padapter)
 504{
 505        struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 506
 507        mutex_init(&pwrctrlpriv->mutex_lock);
 508        pwrctrlpriv->rf_pwrstate = rf_on;
 509        pwrctrlpriv->ips_enter_cnts = 0;
 510        pwrctrlpriv->ips_leave_cnts = 0;
 511        pwrctrlpriv->bips_processing = false;
 512
 513        pwrctrlpriv->ips_mode = padapter->registrypriv.ips_mode;
 514        pwrctrlpriv->ips_mode_req = padapter->registrypriv.ips_mode;
 515
 516        pwrctrlpriv->pwr_state_check_interval = RTW_PWR_STATE_CHK_INTERVAL;
 517        pwrctrlpriv->pwr_state_check_cnts = 0;
 518        pwrctrlpriv->bInternalAutoSuspend = false;
 519        pwrctrlpriv->bInSuspend = false;
 520        pwrctrlpriv->bkeepfwalive = false;
 521
 522        pwrctrlpriv->LpsIdleCount = 0;
 523        if (padapter->registrypriv.mp_mode == 1)
 524                pwrctrlpriv->power_mgnt = PS_MODE_ACTIVE;
 525        else
 526                pwrctrlpriv->power_mgnt = padapter->registrypriv.power_mgnt;/*  PS_MODE_MIN; */
 527        pwrctrlpriv->bLeisurePs = (PS_MODE_ACTIVE != pwrctrlpriv->power_mgnt) ? true : false;
 528
 529        pwrctrlpriv->bFwCurrentInPSMode = false;
 530
 531        pwrctrlpriv->rpwm = 0;
 532        pwrctrlpriv->cpwm = PS_STATE_S4;
 533
 534        pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
 535        pwrctrlpriv->smart_ps = padapter->registrypriv.smart_ps;
 536        pwrctrlpriv->bcn_ant_mode = 0;
 537
 538        pwrctrlpriv->tog = 0x80;
 539
 540        pwrctrlpriv->btcoex_rfon = false;
 541
 542        setup_timer(&pwrctrlpriv->pwr_state_check_timer,
 543                    pwr_state_check_handler,
 544                    (unsigned long)padapter);
 545}
 546
 547/*
 548* rtw_pwr_wakeup - Wake the NIC up from: 1)IPS. 2)USB autosuspend
 549* @adapter: pointer to struct adapter structure
 550* @ips_deffer_ms: the ms will prevent from falling into IPS after wakeup
 551* Return _SUCCESS or _FAIL
 552*/
 553
 554int _rtw_pwr_wakeup(struct adapter *padapter, u32 ips_deffer_ms, const char *caller)
 555{
 556        struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 557        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 558        unsigned long expires;
 559        unsigned long start;
 560        int ret = _SUCCESS;
 561
 562        expires = jiffies + msecs_to_jiffies(ips_deffer_ms);
 563        if (time_before(pwrpriv->ips_deny_time, expires))
 564                pwrpriv->ips_deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);
 565
 566        start = jiffies;
 567        if (pwrpriv->ps_processing) {
 568                DBG_88E("%s wait ps_processing...\n", __func__);
 569                while (pwrpriv->ps_processing &&
 570                       jiffies_to_msecs(jiffies - start) <= 3000)
 571                        usleep_range(1000, 3000);
 572                if (pwrpriv->ps_processing)
 573                        DBG_88E("%s wait ps_processing timeout\n", __func__);
 574                else
 575                        DBG_88E("%s wait ps_processing done\n", __func__);
 576        }
 577
 578        /* System suspend is not allowed to wakeup */
 579        if ((!pwrpriv->bInternalAutoSuspend) && (pwrpriv->bInSuspend)) {
 580                ret = _FAIL;
 581                goto exit;
 582        }
 583
 584        /* block??? */
 585        if ((pwrpriv->bInternalAutoSuspend)  && (padapter->net_closed)) {
 586                ret = _FAIL;
 587                goto exit;
 588        }
 589
 590        /* I think this should be check in IPS, LPS, autosuspend functions... */
 591        if (check_fwstate(pmlmepriv, _FW_LINKED)) {
 592                ret = _SUCCESS;
 593                goto exit;
 594        }
 595        if (rf_off == pwrpriv->rf_pwrstate) {
 596                DBG_88E("%s call ips_leave....\n", __func__);
 597                if (_FAIL ==  ips_leave(padapter)) {
 598                        DBG_88E("======> ips_leave fail.............\n");
 599                        ret = _FAIL;
 600                        goto exit;
 601                }
 602        }
 603
 604        /* TODO: the following checking need to be merged... */
 605        if (padapter->bDriverStopped || !padapter->bup ||
 606            !padapter->hw_init_completed) {
 607                DBG_88E("%s: bDriverStopped=%d, bup=%d, hw_init_completed =%u\n"
 608                        , caller
 609                        , padapter->bDriverStopped
 610                        , padapter->bup
 611                        , padapter->hw_init_completed);
 612                ret = false;
 613                goto exit;
 614        }
 615
 616exit:
 617        expires = jiffies + msecs_to_jiffies(ips_deffer_ms);
 618        if (time_before(pwrpriv->ips_deny_time, expires))
 619                pwrpriv->ips_deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);
 620        return ret;
 621}
 622
 623int rtw_pm_set_lps(struct adapter *padapter, u8 mode)
 624{
 625        int     ret = 0;
 626        struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 627
 628        if (mode < PS_MODE_NUM) {
 629                if (pwrctrlpriv->power_mgnt != mode) {
 630                        if (PS_MODE_ACTIVE == mode)
 631                                LeaveAllPowerSaveMode(padapter);
 632                        else
 633                                pwrctrlpriv->LpsIdleCount = 2;
 634                        pwrctrlpriv->power_mgnt = mode;
 635                        pwrctrlpriv->bLeisurePs = (PS_MODE_ACTIVE != pwrctrlpriv->power_mgnt) ? true : false;
 636                }
 637        } else {
 638                ret = -EINVAL;
 639        }
 640
 641        return ret;
 642}
 643
 644int rtw_pm_set_ips(struct adapter *padapter, u8 mode)
 645{
 646        struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 647
 648        if (mode == IPS_NORMAL || mode == IPS_LEVEL_2) {
 649                rtw_ips_mode_req(pwrctrlpriv, mode);
 650                DBG_88E("%s %s\n", __func__, mode == IPS_NORMAL ? "IPS_NORMAL" : "IPS_LEVEL_2");
 651                return 0;
 652        } else if (mode == IPS_NONE) {
 653                rtw_ips_mode_req(pwrctrlpriv, mode);
 654                DBG_88E("%s %s\n", __func__, "IPS_NONE");
 655                if ((padapter->bSurpriseRemoved == 0) && (_FAIL == rtw_pwr_wakeup(padapter)))
 656                        return -EFAULT;
 657        } else {
 658                return -EINVAL;
 659        }
 660        return 0;
 661}
 662