drivers/staging/rtl8188eu/core/rtw_pwrctrl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _RTW_PWRCTRL_C_
   8
   9 #include <osdep_service.h>
  10 #include <drv_types.h>
  11 #include <osdep_intf.h>
  12 #include <usb_ops_linux.h>
  13 #include <linux/usb.h>
  14
  15 static int rtw_hw_suspend(struct adapter *padapter)
  16 {
  17         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
  18         struct net_device *pnetdev = padapter->pnetdev;
  19
  20         if ((!padapter->bup) || (padapter->bDriverStopped) ||
  21             (padapter->bSurpriseRemoved)) {
  22                 DBG_88E("padapter->bup=%d bDriverStopped=%d bSurpriseRemoved = %d\n",
  23                         padapter->bup, padapter->bDriverStopped,
  24                         padapter->bSurpriseRemoved);
  25                 goto error_exit;
  26         }
  27
  28         /* system suspend */
  29         LeaveAllPowerSaveMode(padapter);
  30
  31         DBG_88E("==> %s\n", __func__);
  32         mutex_lock(&pwrpriv->mutex_lock);
  33         pwrpriv->bips_processing = true;
  34         /* s1. */
  35         if (pnetdev) {
  36                 netif_carrier_off(pnetdev);
  37                 netif_tx_stop_all_queues(pnetdev);
  38         }
  39
  40         /* s2. */
  41         rtw_disassoc_cmd(padapter, 500, false);
  42
  43         /* s2-2.  indicate disconnect to os */
  44         {
  45                 struct  mlme_priv *pmlmepriv = &padapter->mlmepriv;
  46
  47                 if (check_fwstate(pmlmepriv, _FW_LINKED)) {
  48                         _clr_fwstate_(pmlmepriv, _FW_LINKED);
  49
  50                         led_control_8188eu(padapter, LED_CTL_NO_LINK);
  51
  52                         rtw_os_indicate_disconnect(padapter);
  53
  54                         /* donnot enqueue cmd */
  55                         rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 0);
  56                 }
  57         }
  58         /* s2-3. */
  59         rtw_free_assoc_resources(padapter);
  60
  61         /* s2-4. */
  62         rtw_free_network_queue(padapter, true);
  63         rtw_ips_dev_unload(padapter);
  64         pwrpriv->rf_pwrstate = rf_off;
  65         pwrpriv->bips_processing = false;
  66
  67         mutex_unlock(&pwrpriv->mutex_lock);
  68
  69         return 0;
  70
  71 error_exit:
  72         DBG_88E("%s, failed\n", __func__);
  73         return -1;
  74 }
  75
  76 static int rtw_hw_resume(struct adapter *padapter)
  77 {
  78         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
  79         struct net_device *pnetdev = padapter->pnetdev;
  80
  81         /* system resume */
  82         DBG_88E("==> %s\n", __func__);
  83         mutex_lock(&pwrpriv->mutex_lock);
  84         pwrpriv->bips_processing = true;
  85         rtw_reset_drv_sw(padapter);
  86
  87         if (ips_netdrv_open((struct adapter *)rtw_netdev_priv(pnetdev)) != _SUCCESS) {
  88                 mutex_unlock(&pwrpriv->mutex_lock);
  89                 goto error_exit;
  90         }
  91
  92         netif_device_attach(pnetdev);
  93         netif_carrier_on(pnetdev);
  94
  95         if (!netif_queue_stopped(pnetdev))
  96                 netif_start_queue(pnetdev);
  97         else
  98                 netif_wake_queue(pnetdev);
  99
 100         pwrpriv->bkeepfwalive = false;
 101         pwrpriv->brfoffbyhw = false;
 102
 103         pwrpriv->rf_pwrstate = rf_on;
 104         pwrpriv->bips_processing = false;
 105
 106         mutex_unlock(&pwrpriv->mutex_lock);
 107
 108         return 0;
 109 error_exit:
 110         DBG_88E("%s, Open net dev failed\n", __func__);
 111         return -1;
 112 }
 113
 114 void ips_enter(struct adapter *padapter)
 115 {
 116         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 117         struct xmit_priv *pxmit_priv = &padapter->xmitpriv;
 118
 119         if (padapter->registrypriv.mp_mode == 1)
 120                 return;
 121
 122         if (pxmit_priv->free_xmitbuf_cnt != NR_XMITBUFF ||
 123             pxmit_priv->free_xmit_extbuf_cnt != NR_XMIT_EXTBUFF) {
 124                 DBG_88E_LEVEL(_drv_info_, "There are some pkts to transmit\n");
 125                 DBG_88E_LEVEL(_drv_info_, "free_xmitbuf_cnt: %d, free_xmit_extbuf_cnt: %d\n",
 126                               pxmit_priv->free_xmitbuf_cnt, pxmit_priv->free_xmit_extbuf_cnt);
 127                 return;
 128         }
 129
 130         mutex_lock(&pwrpriv->mutex_lock);
 131
 132         pwrpriv->bips_processing = true;
 133
 134         /*  syn ips_mode with request */
 135         pwrpriv->ips_mode = pwrpriv->ips_mode_req;
 136
 137         pwrpriv->ips_enter_cnts++;
 138         DBG_88E("==>%s:%d\n", __func__, pwrpriv->ips_enter_cnts);
 139         if (rf_off == pwrpriv->change_rfpwrstate) {
 140                 pwrpriv->bpower_saving = true;
 141                 DBG_88E_LEVEL(_drv_info_, "nolinked power save enter\n");
 142
 143                 if (pwrpriv->ips_mode == IPS_LEVEL_2)
 144                         pwrpriv->bkeepfwalive = true;
 145
 146                 rtw_ips_pwr_down(padapter);
 147                 pwrpriv->rf_pwrstate = rf_off;
 148         }
 149         pwrpriv->bips_processing = false;
 150
 151         mutex_unlock(&pwrpriv->mutex_lock);
 152 }
 153
 154 int ips_leave(struct adapter *padapter)
 155 {
 156         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 157         struct security_priv *psecuritypriv = &(padapter->securitypriv);
 158         struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
 159         int result = _SUCCESS;
 160         int keyid;
 161
 162         mutex_lock(&pwrpriv->mutex_lock);
 163
 164         if ((pwrpriv->rf_pwrstate == rf_off) && (!pwrpriv->bips_processing)) {
 165                 pwrpriv->bips_processing = true;
 166                 pwrpriv->change_rfpwrstate = rf_on;
 167                 pwrpriv->ips_leave_cnts++;
 168                 DBG_88E("==>%s:%d\n", __func__, pwrpriv->ips_leave_cnts);
 169
 170                 result = rtw_ips_pwr_up(padapter);
 171                 if (result == _SUCCESS)
 172                         pwrpriv->rf_pwrstate = rf_on;
 173
 174                 DBG_88E_LEVEL(_drv_info_, "nolinked power save leave\n");
 175
 176                 if ((_WEP40_ == psecuritypriv->dot11PrivacyAlgrthm) || (_WEP104_ == psecuritypriv->dot11PrivacyAlgrthm)) {
 177                         DBG_88E("==>%s, channel(%d), processing(%x)\n", __func__, padapter->mlmeextpriv.cur_channel, pwrpriv->bips_processing);
 178                         set_channel_bwmode(padapter, padapter->mlmeextpriv.cur_channel, HAL_PRIME_CHNL_OFFSET_DONT_CARE, HT_CHANNEL_WIDTH_20);
 179                         for (keyid = 0; keyid < 4; keyid++) {
 180                                 if (pmlmepriv->key_mask & BIT(keyid)) {
 181                                         if (keyid == psecuritypriv->dot11PrivacyKeyIndex)
 182                                                 result = rtw_set_key(padapter, psecuritypriv, keyid, 1);
 183                                         else
 184                                                 result = rtw_set_key(padapter, psecuritypriv, keyid, 0);
 185                                 }
 186                         }
 187                 }
 188
 189                 DBG_88E("==> %s.....LED(0x%08x)...\n", __func__, usb_read32(padapter, 0x4c));
 190                 pwrpriv->bips_processing = false;
 191
 192                 pwrpriv->bkeepfwalive = false;
 193                 pwrpriv->bpower_saving = false;
 194         }
 195
 196         mutex_unlock(&pwrpriv->mutex_lock);
 197
 198         return result;
 199 }
 200
 201 static bool rtw_pwr_unassociated_idle(struct adapter *adapter)
 202 {
 203         struct mlme_priv *pmlmepriv = &(adapter->mlmepriv);
 204         bool ret = false;
 205
 206         if (time_after_eq(adapter->pwrctrlpriv.ips_deny_time, jiffies))
 207                 goto exit;
 208
 209         if (check_fwstate(pmlmepriv, WIFI_ASOC_STATE|WIFI_SITE_MONITOR) ||
 210             check_fwstate(pmlmepriv, WIFI_UNDER_LINKING|WIFI_UNDER_WPS) ||
 211             check_fwstate(pmlmepriv, WIFI_AP_STATE) ||
 212             check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE|WIFI_ADHOC_STATE))
 213                 goto exit;
 214
 215         ret = true;
 216
 217 exit:
 218         return ret;
 219 }
 220
 221 void rtw_ps_processor(struct adapter *padapter)
 222 {
 223         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 224         struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
 225         enum rt_rf_power_state rfpwrstate;
 226
 227         pwrpriv->ps_processing = true;
 228
 229         if (pwrpriv->bips_processing)
 230                 goto exit;
 231
 232         if (padapter->pwrctrlpriv.bHWPwrPindetect) {
 233                 rfpwrstate = RfOnOffDetect(padapter);
 234                 DBG_88E("@@@@- #2  %s==> rfstate:%s\n", __func__, (rfpwrstate == rf_on) ? "rf_on" : "rf_off");
 235
 236                 if (rfpwrstate != pwrpriv->rf_pwrstate) {
 237                         if (rfpwrstate == rf_off) {
 238                                 pwrpriv->change_rfpwrstate = rf_off;
 239                                 pwrpriv->brfoffbyhw = true;
 240                                 rtw_hw_suspend(padapter);
 241                         } else {
 242                                 pwrpriv->change_rfpwrstate = rf_on;
 243                                 rtw_hw_resume(padapter);
 244                         }
 245                         DBG_88E("current rf_pwrstate(%s)\n", (pwrpriv->rf_pwrstate == rf_off) ? "rf_off" : "rf_on");
 246                 }
 247                 pwrpriv->pwr_state_check_cnts++;
 248         }
 249
 250         if (pwrpriv->ips_mode_req == IPS_NONE)
 251                 goto exit;
 252
 253         if (!rtw_pwr_unassociated_idle(padapter))
 254                 goto exit;
 255
 256         if ((pwrpriv->rf_pwrstate == rf_on) && ((pwrpriv->pwr_state_check_cnts%4) == 0)) {
 257                 DBG_88E("==>%s .fw_state(%x)\n", __func__, get_fwstate(pmlmepriv));
 258                 pwrpriv->change_rfpwrstate = rf_off;
 259
 260                 ips_enter(padapter);
 261         }
 262 exit:
 263         rtw_set_pwr_state_check_timer(&padapter->pwrctrlpriv);
 264         pwrpriv->ps_processing = false;
 265 }
 266
 267 static void pwr_state_check_handler(struct timer_list *t)
 268 {
 269         struct adapter *padapter =
 270                 from_timer(padapter, t,
 271                                 pwrctrlpriv.pwr_state_check_timer);
 272
 273         rtw_ps_cmd(padapter);
 274 }
 275
 276 /*
 277  *
 278  * Parameters
 279  *      padapter
 280  *      pslv                    power state level, only could be PS_STATE_S0 ~ PS_STATE_S4
 281  *
 282  */
 283 void rtw_set_rpwm(struct adapter *padapter, u8 pslv)
 284 {
 285         u8      rpwm;
 286         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 287
 288         pslv = PS_STATE(pslv);
 289
 290         if (pwrpriv->btcoex_rfon) {
 291                 if (pslv < PS_STATE_S4)
 292                         pslv = PS_STATE_S3;
 293         }
 294
 295         if (pwrpriv->rpwm == pslv) {
 296                 RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 297                          ("%s: Already set rpwm[0x%02X], new=0x%02X!\n", __func__, pwrpriv->rpwm, pslv));
 298                 return;
 299         }
 300
 301         if ((padapter->bSurpriseRemoved) ||
 302             (!padapter->hw_init_completed)) {
 303                 RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 304                          ("%s: SurpriseRemoved(%d) hw_init_completed(%d)\n",
 305                          __func__, padapter->bSurpriseRemoved, padapter->hw_init_completed));
 306
 307                 pwrpriv->cpwm = PS_STATE_S4;
 308
 309                 return;
 310         }
 311
 312         if (padapter->bDriverStopped) {
 313                 RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 314                          ("%s: change power state(0x%02X) when DriverStopped\n", __func__, pslv));
 315
 316                 if (pslv < PS_STATE_S2) {
 317                         RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_,
 318                                  ("%s: Reject to enter PS_STATE(0x%02X) lower than S2 when DriverStopped!!\n", __func__, pslv));
 319                         return;
 320                 }
 321         }
 322
 323         rpwm = pslv | pwrpriv->tog;
 324         RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_notice_,
 325                  ("%s: rpwm=0x%02x cpwm=0x%02x\n", __func__, rpwm, pwrpriv->cpwm));
 326
 327         pwrpriv->rpwm = pslv;
 328
 329         rtw_hal_set_hwreg(padapter, HW_VAR_SET_RPWM, (u8 *)(&rpwm));
 330
 331         pwrpriv->tog += 0x80;
 332         pwrpriv->cpwm = pslv;
 333 }
 334
 335 static u8 PS_RDY_CHECK(struct adapter *padapter)
 336 {
 337         unsigned long curr_time, delta_time;
 338         struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 339         struct mlme_priv        *pmlmepriv = &(padapter->mlmepriv);
 340
 341         curr_time = jiffies;
 342         delta_time = curr_time - pwrpriv->DelayLPSLastTimeStamp;
 343
 344         if (delta_time < LPS_DELAY_TIME)
 345                 return false;
 346
 347         if ((!check_fwstate(pmlmepriv, _FW_LINKED)) ||
 348             (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY)) ||
 349             (check_fwstate(pmlmepriv, WIFI_AP_STATE)) ||
 350             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) ||
 351             (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)))
 352                 return false;
 353         if (pwrpriv->bInSuspend)
 354                 return false;
 355         if (padapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X &&
 356             !padapter->securitypriv.binstallGrpkey) {
 357                 DBG_88E("Group handshake still in progress !!!\n");
 358                 return false;
 359         }
 360         return true;
 361 }
 362
 363 void rtw_set_ps_mode(struct adapter *padapter, u8 ps_mode, u8 smart_ps, u8 bcn_ant_mode)
 364 {
 365         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 366
 367         RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_notice_,
 368                  ("%s: PowerMode=%d Smart_PS=%d\n",
 369                   __func__, ps_mode, smart_ps));
 370
 371         if (ps_mode > PM_Card_Disable) {
 372                 RT_TRACE(_module_rtl871x_pwrctrl_c_, _drv_err_, ("ps_mode:%d error\n", ps_mode));
 373                 return;
 374         }
 375
 376         if (pwrpriv->pwr_mode == ps_mode) {
 377                 if (ps_mode == PS_MODE_ACTIVE)
 378                         return;
 379
 380                 if ((pwrpriv->smart_ps == smart_ps) &&
 381                     (pwrpriv->bcn_ant_mode == bcn_ant_mode))
 382                         return;
 383         }
 384
 385         /* if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) */
 386         if (ps_mode == PS_MODE_ACTIVE) {
 387                 if (PS_RDY_CHECK(padapter)) {
 388                         DBG_88E("%s: Enter 802.11 power save\n", __func__);
 389                         pwrpriv->bFwCurrentInPSMode = true;
 390                         pwrpriv->pwr_mode = ps_mode;
 391                         pwrpriv->smart_ps = smart_ps;
 392                         pwrpriv->bcn_ant_mode = bcn_ant_mode;
 393                         rtw_hal_set_hwreg(padapter, HW_VAR_H2C_FW_PWRMODE, (u8 *)(&ps_mode));
 394                         rtw_set_rpwm(padapter, PS_STATE_S2);
 395                 }
 396         }
 397 }
 398
 399 /*
 400  * Return:
 401  *      0:      Leave OK
 402  *      -1:     Timeout
 403  *      -2:     Other error
 404  */
 405 s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
 406 {
 407         unsigned long start_time;
 408         u8 bAwake = false;
 409         s32 err = 0;
 410
 411         start_time = jiffies;
 412         while (1) {
 413                 rtw_hal_get_hwreg(padapter, HW_VAR_FWLPS_RF_ON, &bAwake);
 414                 if (bAwake)
 415                         break;
 416
 417                 if (padapter->bSurpriseRemoved) {
 418                         err = -2;
 419                         DBG_88E("%s: device surprise removed!!\n", __func__);
 420                         break;
 421                 }
 422
 423                 if (jiffies_to_msecs(jiffies - start_time) > delay_ms) {
 424                         err = -1;
 425                         DBG_88E("%s: Wait for FW LPS leave more than %u ms!!!\n", __func__, delay_ms);
 426                         break;
 427                 }
 428                 msleep(1);
 429         }
 430
 431         return err;
 432 }
 433
 434 /*  */
 435 /*      Description: */
 436 /*              Enter the leisure power save mode. */
 437 /*  */
 438 void LPS_Enter(struct adapter *padapter)
 439 {
 440         struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 441
 442         if (!PS_RDY_CHECK(padapter))
 443                 return;
 444
 445         if (pwrpriv->bLeisurePs) {
 446                 /*  Idle for a while if we connect to AP a while ago. */
 447                 if (pwrpriv->LpsIdleCount >= 2) { /*   4 Sec */
 448                         if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) {
 449                                 pwrpriv->bpower_saving = true;
 450                                 DBG_88E("%s smart_ps:%d\n", __func__, pwrpriv->smart_ps);
 451                                 /* For Tenda W311R IOT issue */
 452                                 rtw_set_ps_mode(padapter, pwrpriv->power_mgnt, pwrpriv->smart_ps, 0);
 453                         }
 454                 } else {
 455                         pwrpriv->LpsIdleCount++;
 456                 }
 457         }
 458 }
 459
 460 #define LPS_LEAVE_TIMEOUT_MS 100
 461
 462 /*      Description: */
 463 /*              Leave the leisure power save mode. */
 464 void LPS_Leave(struct adapter *padapter)
 465 {
 466         struct pwrctrl_priv     *pwrpriv = &padapter->pwrctrlpriv;
 467
 468         if (pwrpriv->bLeisurePs) {
 469                 if (pwrpriv->pwr_mode != PS_MODE_ACTIVE) {
 470                         rtw_set_ps_mode(padapter, PS_MODE_ACTIVE, 0, 0);
 471
 472                         if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
 473                                 LPS_RF_ON_check(padapter, LPS_LEAVE_TIMEOUT_MS);
 474                 }
 475         }
 476
 477         pwrpriv->bpower_saving = false;
 478 }
 479
 480 /*  */
 481 /*  Description: Leave all power save mode: LPS, FwLPS, IPS if needed. */
 482 /*  Move code to function by tynli. 2010.03.26. */
 483 /*  */
 484 void LeaveAllPowerSaveMode(struct adapter *Adapter)
 485 {
 486         struct mlme_priv        *pmlmepriv = &(Adapter->mlmepriv);
 487         u8      enqueue = 0;
 488
 489         if (check_fwstate(pmlmepriv, _FW_LINKED))
 490                 rtw_lps_ctrl_wk_cmd(Adapter, LPS_CTRL_LEAVE, enqueue);
 491 }
 492
 493 void rtw_init_pwrctrl_priv(struct adapter *padapter)
 494 {
 495         struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 496
 497         mutex_init(&pwrctrlpriv->mutex_lock);
 498         pwrctrlpriv->rf_pwrstate = rf_on;
 499         pwrctrlpriv->ips_enter_cnts = 0;
 500         pwrctrlpriv->ips_leave_cnts = 0;
 501         pwrctrlpriv->bips_processing = false;
 502
 503         pwrctrlpriv->ips_mode = padapter->registrypriv.ips_mode;
 504         pwrctrlpriv->ips_mode_req = padapter->registrypriv.ips_mode;
 505
 506         pwrctrlpriv->pwr_state_check_interval = RTW_PWR_STATE_CHK_INTERVAL;
 507         pwrctrlpriv->pwr_state_check_cnts = 0;
 508         pwrctrlpriv->bInternalAutoSuspend = false;
 509         pwrctrlpriv->bInSuspend = false;
 510         pwrctrlpriv->bkeepfwalive = false;
 511
 512         pwrctrlpriv->LpsIdleCount = 0;
 513         if (padapter->registrypriv.mp_mode == 1)
 514                 pwrctrlpriv->power_mgnt = PS_MODE_ACTIVE;
 515         else
 516                 pwrctrlpriv->power_mgnt = padapter->registrypriv.power_mgnt;/*  PS_MODE_MIN; */
 517         pwrctrlpriv->bLeisurePs = (pwrctrlpriv->power_mgnt != PS_MODE_ACTIVE) ? true : false;
 518
 519         pwrctrlpriv->bFwCurrentInPSMode = false;
 520
 521         pwrctrlpriv->rpwm = 0;
 522         pwrctrlpriv->cpwm = PS_STATE_S4;
 523
 524         pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
 525         pwrctrlpriv->smart_ps = padapter->registrypriv.smart_ps;
 526         pwrctrlpriv->bcn_ant_mode = 0;
 527
 528         pwrctrlpriv->tog = 0x80;
 529
 530         pwrctrlpriv->btcoex_rfon = false;
 531
 532         timer_setup(&pwrctrlpriv->pwr_state_check_timer,
 533                     pwr_state_check_handler, 0);
 534 }
 535
 536 /*
 537 * rtw_pwr_wakeup - Wake the NIC up from: 1)IPS. 2)USB autosuspend
 538 * @adapter: pointer to struct adapter structure
 539 * @ips_deffer_ms: the ms will prevent from falling into IPS after wakeup
 540 * Return _SUCCESS or _FAIL
 541 */
 542
 543 int _rtw_pwr_wakeup(struct adapter *padapter, u32 ips_deffer_ms, const char *caller)
 544 {
 545         struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
 546         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 547         unsigned long expires;
 548         unsigned long start;
 549         int ret = _SUCCESS;
 550
 551         expires = jiffies + msecs_to_jiffies(ips_deffer_ms);
 552         if (time_before(pwrpriv->ips_deny_time, expires))
 553                 pwrpriv->ips_deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);
 554
 555         start = jiffies;
 556         if (pwrpriv->ps_processing) {
 557                 DBG_88E("%s wait ps_processing...\n", __func__);
 558                 while (pwrpriv->ps_processing &&
 559                        jiffies_to_msecs(jiffies - start) <= 3000)
 560                         udelay(1500);
 561                 if (pwrpriv->ps_processing)
 562                         DBG_88E("%s wait ps_processing timeout\n", __func__);
 563                 else
 564                         DBG_88E("%s wait ps_processing done\n", __func__);
 565         }
 566
 567         /* System suspend is not allowed to wakeup */
 568         if ((!pwrpriv->bInternalAutoSuspend) && (pwrpriv->bInSuspend)) {
 569                 ret = _FAIL;
 570                 goto exit;
 571         }
 572
 573         /* block??? */
 574         if ((pwrpriv->bInternalAutoSuspend)  && (padapter->net_closed)) {
 575                 ret = _FAIL;
 576                 goto exit;
 577         }
 578
 579         /* I think this should be check in IPS, LPS, autosuspend functions... */
 580         if (check_fwstate(pmlmepriv, _FW_LINKED)) {
 581                 ret = _SUCCESS;
 582                 goto exit;
 583         }
 584         if (rf_off == pwrpriv->rf_pwrstate) {
 585                 DBG_88E("%s call ips_leave....\n", __func__);
 586                 if (ips_leave(padapter) ==  _FAIL) {
 587                         DBG_88E("======> ips_leave fail.............\n");
 588                         ret = _FAIL;
 589                         goto exit;
 590                 }
 591         }
 592
 593         /* TODO: the following checking need to be merged... */
 594         if (padapter->bDriverStopped || !padapter->bup ||
 595             !padapter->hw_init_completed) {
 596                 DBG_88E("%s: bDriverStopped=%d, bup=%d, hw_init_completed =%u\n"
 597                         , caller
 598                         , padapter->bDriverStopped
 599                         , padapter->bup
 600                         , padapter->hw_init_completed);
 601                 ret = false;
 602                 goto exit;
 603         }
 604
 605 exit:
 606         expires = jiffies + msecs_to_jiffies(ips_deffer_ms);
 607         if (time_before(pwrpriv->ips_deny_time, expires))
 608                 pwrpriv->ips_deny_time = jiffies + msecs_to_jiffies(ips_deffer_ms);
 609         return ret;
 610 }
 611
 612 int rtw_pm_set_lps(struct adapter *padapter, u8 mode)
 613 {
 614         int     ret = 0;
 615         struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 616
 617         if (mode < PS_MODE_NUM) {
 618                 if (pwrctrlpriv->power_mgnt != mode) {
 619                         if (mode == PS_MODE_ACTIVE)
 620                                 LeaveAllPowerSaveMode(padapter);
 621                         else
 622                                 pwrctrlpriv->LpsIdleCount = 2;
 623                         pwrctrlpriv->power_mgnt = mode;
 624                         pwrctrlpriv->bLeisurePs = (pwrctrlpriv->power_mgnt != PS_MODE_ACTIVE) ? true : false;
 625                 }
 626         } else {
 627                 ret = -EINVAL;
 628         }
 629
 630         return ret;
 631 }
 632
 633 int rtw_pm_set_ips(struct adapter *padapter, u8 mode)
 634 {
 635         struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 636
 637         if (mode == IPS_NORMAL || mode == IPS_LEVEL_2) {
 638                 rtw_ips_mode_req(pwrctrlpriv, mode);
 639                 DBG_88E("%s %s\n", __func__, mode == IPS_NORMAL ? "IPS_NORMAL" : "IPS_LEVEL_2");
 640                 return 0;
 641         } else if (mode == IPS_NONE) {
 642                 rtw_ips_mode_req(pwrctrlpriv, mode);
 643                 DBG_88E("%s %s\n", __func__, "IPS_NONE");
 644                 if ((padapter->bSurpriseRemoved == 0) && (rtw_pwr_wakeup(padapter) == _FAIL))
 645                         return -EFAULT;
 646         } else {
 647                 return -EINVAL;
 648         }
 649         return 0;
 650 }