drivers/staging/ath6kl/os/linux/ar6000_pm.c

   1 /*
   2  *
   3  * Copyright (c) 2004-2010 Atheros Communications Inc.
   4  * All rights reserved.
   5  *
   6  *
   7 //
   8 // Permission to use, copy, modify, and/or distribute this software for any
   9 // purpose with or without fee is hereby granted, provided that the above
  10 // copyright notice and this permission notice appear in all copies.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15 // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17 // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18 // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19 //
  20 //
  21  *
  22  */
  23
  24 /*
  25  * Implementation of system power management
  26  */
  27
  28 #include "ar6000_drv.h"
  29 #include <linux/inetdevice.h>
  30 #include <linux/platform_device.h>
  31 #include "wlan_config.h"
  32
  33 #define WOW_ENABLE_MAX_INTERVAL 0
  34 #define WOW_SET_SCAN_PARAMS     0
  35
  36 extern unsigned int wmitimeout;
  37 extern wait_queue_head_t arEvent;
  38
  39 #ifdef ANDROID_ENV
  40 extern void android_ar6k_check_wow_status(struct ar6_softc *ar, struct sk_buff *skb, bool isEvent);
  41 #endif
  42 #undef ATH_MODULE_NAME
  43 #define ATH_MODULE_NAME pm
  44 #define  ATH_DEBUG_PM       ATH_DEBUG_MAKE_MODULE_MASK(0)
  45
  46 #ifdef DEBUG
  47 static struct ath_debug_mask_description pm_debug_desc[] = {
  48     { ATH_DEBUG_PM     , "System power management"},
  49 };
  50
  51 ATH_DEBUG_INSTANTIATE_MODULE_VAR(pm,
  52                                  "pm",
  53                                  "System Power Management",
  54                                  ATH_DEBUG_MASK_DEFAULTS | ATH_DEBUG_PM,
  55                                  ATH_DEBUG_DESCRIPTION_COUNT(pm_debug_desc),
  56                                  pm_debug_desc);
  57
  58 #endif /* DEBUG */
  59
  60 int ar6000_exit_cut_power_state(struct ar6_softc *ar);
  61
  62 #ifdef CONFIG_PM
  63 static void ar6k_send_asleep_event_to_app(struct ar6_softc *ar, bool asleep)
  64 {
  65     char buf[128];
  66     union iwreq_data wrqu;
  67
  68     snprintf(buf, sizeof(buf), "HOST_ASLEEP=%s", asleep ? "asleep" : "awake");
  69     A_MEMZERO(&wrqu, sizeof(wrqu));
  70     wrqu.data.length = strlen(buf);
  71     wireless_send_event(ar->arNetDev, IWEVCUSTOM, &wrqu, buf);
  72 }
  73
  74 static void ar6000_wow_resume(struct ar6_softc *ar)
  75 {
  76     if (ar->arWowState!= WLAN_WOW_STATE_NONE) {
  77         u16 fg_start_period = (ar->scParams.fg_start_period==0) ? 1 : ar->scParams.fg_start_period;
  78         u16 bg_period = (ar->scParams.bg_period==0) ? 60 : ar->scParams.bg_period;
  79         WMI_SET_HOST_SLEEP_MODE_CMD hostSleepMode = {true, false};
  80         ar->arWowState = WLAN_WOW_STATE_NONE;
  81         if (wmi_set_host_sleep_mode_cmd(ar->arWmi, &hostSleepMode)!= 0) {
  82             AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to setup restore host awake\n"));
  83         }
  84 #if WOW_SET_SCAN_PARAMS
  85         wmi_scanparams_cmd(ar->arWmi, fg_start_period,
  86                                    ar->scParams.fg_end_period,
  87                                    bg_period,
  88                                    ar->scParams.minact_chdwell_time,
  89                                    ar->scParams.maxact_chdwell_time,
  90                                    ar->scParams.pas_chdwell_time,
  91                                    ar->scParams.shortScanRatio,
  92                                    ar->scParams.scanCtrlFlags,
  93                                    ar->scParams.max_dfsch_act_time,
  94                                    ar->scParams.maxact_scan_per_ssid);
  95 #else
  96        (void)fg_start_period;
  97        (void)bg_period;
  98 #endif
  99
 100
 101 #if WOW_ENABLE_MAX_INTERVAL /* we don't do it if the power consumption is already good enough. */
 102         if (wmi_listeninterval_cmd(ar->arWmi, ar->arListenIntervalT, ar->arListenIntervalB) == 0) {
 103         }
 104 #endif
 105         ar6k_send_asleep_event_to_app(ar, false);
 106         AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("Resume WoW successfully\n"));
 107     } else {
 108         AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("WoW does not invoked. skip resume"));
 109     }
 110     ar->arWlanPowerState = WLAN_POWER_STATE_ON;
 111 }
 112
 113 static void ar6000_wow_suspend(struct ar6_softc *ar)
 114 {
 115 #define WOW_LIST_ID 1
 116     if (ar->arNetworkType != AP_NETWORK) {
 117         /* Setup WoW for unicast & Arp request for our own IP
 118         disable background scan. Set listen interval into 1000 TUs
 119         Enable keepliave for 110 seconds
 120         */
 121         struct in_ifaddr **ifap = NULL;
 122         struct in_ifaddr *ifa = NULL;
 123         struct in_device *in_dev;
 124         u8 macMask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 125         int status;
 126         WMI_ADD_WOW_PATTERN_CMD addWowCmd = { .filter = { 0 } };
 127         WMI_DEL_WOW_PATTERN_CMD delWowCmd;
 128         WMI_SET_HOST_SLEEP_MODE_CMD hostSleepMode = {false, true};
 129         WMI_SET_WOW_MODE_CMD wowMode = {    .enable_wow = true,
 130                                             .hostReqDelay = 500 };/*500 ms delay*/
 131
 132         if (ar->arWowState!= WLAN_WOW_STATE_NONE) {
 133             AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("System already go into wow mode!\n"));
 134             return;
 135         }
 136
 137         ar6000_TxDataCleanup(ar); /* IMPORTANT, otherwise there will be 11mA after listen interval as 1000*/
 138
 139 #if WOW_ENABLE_MAX_INTERVAL /* we don't do it if the power consumption is already good enough. */
 140         if (wmi_listeninterval_cmd(ar->arWmi, A_MAX_WOW_LISTEN_INTERVAL, 0) == 0) {
 141         }
 142 #endif
 143
 144 #if WOW_SET_SCAN_PARAMS
 145         status = wmi_scanparams_cmd(ar->arWmi, 0xFFFF, 0, 0xFFFF, 0, 0, 0, 0, 0, 0, 0);
 146 #endif
 147         /* clear up our WoW pattern first */
 148         delWowCmd.filter_list_id = WOW_LIST_ID;
 149         delWowCmd.filter_id = 0;
 150         wmi_del_wow_pattern_cmd(ar->arWmi, &delWowCmd);
 151
 152         /* setup unicast packet pattern for WoW */
 153         if (ar->arNetDev->dev_addr[1]) {
 154             addWowCmd.filter_list_id = WOW_LIST_ID;
 155             addWowCmd.filter_size = 6; /* MAC address */
 156             addWowCmd.filter_offset = 0;
 157             status = wmi_add_wow_pattern_cmd(ar->arWmi, &addWowCmd, ar->arNetDev->dev_addr, macMask, addWowCmd.filter_size);
 158             if (status) {
 159                 AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to add WoW pattern\n"));
 160             }
 161         }
 162         /* setup ARP request for our own IP */
 163         if ((in_dev = __in_dev_get_rtnl(ar->arNetDev)) != NULL) {
 164             for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; ifap = &ifa->ifa_next) {
 165                 if (!strcmp(ar->arNetDev->name, ifa->ifa_label)) {
 166                     break; /* found */
 167                 }
 168             }
 169         }
 170         if (ifa && ifa->ifa_local) {
 171             WMI_SET_IP_CMD ipCmd;
 172             memset(&ipCmd, 0, sizeof(ipCmd));
 173             ipCmd.ips[0] = ifa->ifa_local;
 174             status = wmi_set_ip_cmd(ar->arWmi, &ipCmd);
 175             if (status) {
 176                 AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to setup IP for ARP agent\n"));
 177             }
 178         }
 179
 180 #ifndef ATH6K_CONFIG_OTA_MODE
 181         wmi_powermode_cmd(ar->arWmi, REC_POWER);
 182 #endif
 183
 184         status = wmi_set_wow_mode_cmd(ar->arWmi, &wowMode);
 185         if (status) {
 186             AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to enable wow mode\n"));
 187         }
 188         ar6k_send_asleep_event_to_app(ar, true);
 189
 190         status = wmi_set_host_sleep_mode_cmd(ar->arWmi, &hostSleepMode);
 191         if (status) {
 192             AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to set host asleep\n"));
 193         }
 194
 195         ar->arWowState = WLAN_WOW_STATE_SUSPENDING;
 196         if (ar->arTxPending[ar->arControlEp]) {
 197             u32 timeleft = wait_event_interruptible_timeout(arEvent,
 198             ar->arTxPending[ar->arControlEp] == 0, wmitimeout * HZ);
 199             if (!timeleft || signal_pending(current)) {
 200                /* what can I do? wow resume at once */
 201                 AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to setup WoW. Pending wmi control data %d\n", ar->arTxPending[ar->arControlEp]));
 202             }
 203         }
 204
 205         status = hifWaitForPendingRecv(ar->arHifDevice);
 206
 207         ar->arWowState = WLAN_WOW_STATE_SUSPENDED;
 208         ar->arWlanPowerState = WLAN_POWER_STATE_WOW;
 209     } else {
 210         AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Not allowed to go to WOW at this moment.\n"));
 211     }
 212 }
 213
 214 int ar6000_suspend_ev(void *context)
 215 {
 216     int status = 0;
 217     struct ar6_softc *ar = (struct ar6_softc *)context;
 218     s16 pmmode = ar->arSuspendConfig;
 219 wow_not_connected:
 220     switch (pmmode) {
 221     case WLAN_SUSPEND_WOW:
 222         if (ar->arWmiReady && ar->arWlanState==WLAN_ENABLED && ar->arConnected) {
 223             ar6000_wow_suspend(ar);
 224             AR_DEBUG_PRINTF(ATH_DEBUG_PM,("%s:Suspend for wow mode %d\n", __func__, ar->arWlanPowerState));
 225         } else {
 226             pmmode = ar->arWow2Config;
 227             goto wow_not_connected;
 228         }
 229         break;
 230     case WLAN_SUSPEND_CUT_PWR:
 231         /* fall through */
 232     case WLAN_SUSPEND_CUT_PWR_IF_BT_OFF:
 233         /* fall through */
 234     case WLAN_SUSPEND_DEEP_SLEEP:
 235         /* fall through */
 236     default:
 237         status = ar6000_update_wlan_pwr_state(ar, WLAN_DISABLED, true);
 238         if (ar->arWlanPowerState==WLAN_POWER_STATE_ON ||
 239             ar->arWlanPowerState==WLAN_POWER_STATE_WOW) {
 240             AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("Strange suspend state for not wow mode %d", ar->arWlanPowerState));
 241         }
 242         AR_DEBUG_PRINTF(ATH_DEBUG_PM,("%s:Suspend for %d mode pwr %d status %d\n", __func__, pmmode, ar->arWlanPowerState, status));
 243         status = (ar->arWlanPowerState == WLAN_POWER_STATE_CUT_PWR) ? 0 : A_EBUSY;
 244         break;
 245     }
 246
 247     ar->scan_triggered = 0;
 248     return status;
 249 }
 250
 251 int ar6000_resume_ev(void *context)
 252 {
 253     struct ar6_softc *ar = (struct ar6_softc *)context;
 254     u16 powerState = ar->arWlanPowerState;
 255
 256     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("%s: enter previous state %d wowState %d\n", __func__, powerState, ar->arWowState));
 257     switch (powerState) {
 258     case WLAN_POWER_STATE_WOW:
 259         ar6000_wow_resume(ar);
 260         break;
 261     case WLAN_POWER_STATE_CUT_PWR:
 262         /* fall through */
 263     case WLAN_POWER_STATE_DEEP_SLEEP:
 264         ar6000_update_wlan_pwr_state(ar, WLAN_ENABLED, true);
 265         AR_DEBUG_PRINTF(ATH_DEBUG_PM,("%s:Resume for %d mode pwr %d\n", __func__, powerState, ar->arWlanPowerState));
 266         break;
 267     case WLAN_POWER_STATE_ON:
 268         break;
 269     default:
 270         AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("Strange SDIO bus power mode!!\n"));
 271         break;
 272     }
 273     return 0;
 274 }
 275
 276 void ar6000_check_wow_status(struct ar6_softc *ar, struct sk_buff *skb, bool isEvent)
 277 {
 278     if (ar->arWowState!=WLAN_WOW_STATE_NONE) {
 279         if (ar->arWowState==WLAN_WOW_STATE_SUSPENDING) {
 280             AR_DEBUG_PRINTF(ATH_DEBUG_PM,("\n%s: Received IRQ while we are wow suspending!!!\n\n", __func__));
 281             return;
 282         }
 283         /* Wow resume from irq interrupt */
 284         AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("%s: WoW resume from irq thread status %d\n", __func__, ar->arWlanPowerState));
 285         ar6000_wow_resume(ar);
 286     } else {
 287 #ifdef ANDROID_ENV
 288         android_ar6k_check_wow_status(ar, skb, isEvent);
 289 #endif
 290     }
 291 }
 292
 293 int ar6000_power_change_ev(void *context, u32 config)
 294 {
 295     struct ar6_softc *ar = (struct ar6_softc *)context;
 296     int status = 0;
 297
 298     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("%s: power change event callback %d \n", __func__, config));
 299     switch (config) {
 300        case HIF_DEVICE_POWER_UP:
 301             ar6000_restart_endpoint(ar->arNetDev);
 302             status = 0;
 303             break;
 304        case HIF_DEVICE_POWER_DOWN:
 305        case HIF_DEVICE_POWER_CUT:
 306             status = 0;
 307             break;
 308     }
 309     return status;
 310 }
 311
 312 static int ar6000_pm_probe(struct platform_device *pdev)
 313 {
 314     plat_setup_power(1,1);
 315     return 0;
 316 }
 317
 318 static int ar6000_pm_remove(struct platform_device *pdev)
 319 {
 320     plat_setup_power(0,1);
 321     return 0;
 322 }
 323
 324 static int ar6000_pm_suspend(struct platform_device *pdev, pm_message_t state)
 325 {
 326     return 0;
 327 }
 328
 329 static int ar6000_pm_resume(struct platform_device *pdev)
 330 {
 331     return 0;
 332 }
 333
 334 static struct platform_driver ar6000_pm_device = {
 335     .probe      = ar6000_pm_probe,
 336     .remove     = ar6000_pm_remove,
 337     .suspend    = ar6000_pm_suspend,
 338     .resume     = ar6000_pm_resume,
 339     .driver     = {
 340         .name = "wlan_ar6000_pm",
 341     },
 342 };
 343 #endif /* CONFIG_PM */
 344
 345 int
 346 ar6000_setup_cut_power_state(struct ar6_softc *ar,  AR6000_WLAN_STATE state)
 347 {
 348     int                      status = 0;
 349     HIF_DEVICE_POWER_CHANGE_TYPE  config;
 350
 351     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("%s: Cut power %d %d \n", __func__,state, ar->arWlanPowerState));
 352 #ifdef CONFIG_PM
 353     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("Wlan OFF %d BT OFf %d \n", ar->arWlanOff, ar->arBTOff));
 354 #endif
 355     do {
 356         if (state == WLAN_ENABLED) {
 357             /* Not in cut power state.. exit */
 358             if (ar->arWlanPowerState != WLAN_POWER_STATE_CUT_PWR) {
 359                 break;
 360             }
 361
 362             plat_setup_power(1,0);
 363
 364             /* Change the state to ON */
 365             ar->arWlanPowerState = WLAN_POWER_STATE_ON;
 366
 367
 368             /* Indicate POWER_UP to HIF */
 369             config = HIF_DEVICE_POWER_UP;
 370             status = HIFConfigureDevice(ar->arHifDevice,
 371                                 HIF_DEVICE_POWER_STATE_CHANGE,
 372                                 &config,
 373                                 sizeof(HIF_DEVICE_POWER_CHANGE_TYPE));
 374
 375             if (status == A_PENDING) {
 376 #ifdef ANDROID_ENV
 377                  /* Wait for WMI ready event */
 378                 u32 timeleft = wait_event_interruptible_timeout(arEvent,
 379                             (ar->arWmiReady == true), wmitimeout * HZ);
 380                 if (!timeleft || signal_pending(current)) {
 381                     AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("ar6000 : Failed to get wmi ready \n"));
 382                     status = A_ERROR;
 383                     break;
 384                 }
 385 #endif
 386                 status = 0;
 387             } else if (status == 0) {
 388                 ar6000_restart_endpoint(ar->arNetDev);
 389                 status = 0;
 390             }
 391         } else if (state == WLAN_DISABLED) {
 392
 393
 394             /* Already in cut power state.. exit */
 395             if (ar->arWlanPowerState == WLAN_POWER_STATE_CUT_PWR) {
 396                 break;
 397             }
 398             ar6000_stop_endpoint(ar->arNetDev, true, false);
 399
 400             config = HIF_DEVICE_POWER_CUT;
 401             status = HIFConfigureDevice(ar->arHifDevice,
 402                                 HIF_DEVICE_POWER_STATE_CHANGE,
 403                                 &config,
 404                                 sizeof(HIF_DEVICE_POWER_CHANGE_TYPE));
 405
 406             plat_setup_power(0,0);
 407
 408             ar->arWlanPowerState = WLAN_POWER_STATE_CUT_PWR;
 409         }
 410     } while (0);
 411
 412     return status;
 413 }
 414
 415 int
 416 ar6000_setup_deep_sleep_state(struct ar6_softc *ar, AR6000_WLAN_STATE state)
 417 {
 418     int status = 0;
 419
 420     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("%s: Deep sleep %d %d \n", __func__,state, ar->arWlanPowerState));
 421 #ifdef CONFIG_PM
 422     AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("Wlan OFF %d BT OFf %d \n", ar->arWlanOff, ar->arBTOff));
 423 #endif
 424     do {
 425         WMI_SET_HOST_SLEEP_MODE_CMD hostSleepMode;
 426
 427         if (state == WLAN_ENABLED) {
 428             u16 fg_start_period;
 429
 430             /* Not in deep sleep state.. exit */
 431             if (ar->arWlanPowerState != WLAN_POWER_STATE_DEEP_SLEEP) {
 432                 if (ar->arWlanPowerState != WLAN_POWER_STATE_ON) {
 433                     AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("Strange state when we resume from deep sleep %d\n", ar->arWlanPowerState));
 434                 }
 435                 break;
 436             }
 437
 438             fg_start_period = (ar->scParams.fg_start_period==0) ? 1 : ar->scParams.fg_start_period;
 439             hostSleepMode.awake = true;
 440             hostSleepMode.asleep = false;
 441
 442             if ((status=wmi_set_host_sleep_mode_cmd(ar->arWmi, &hostSleepMode)) != 0) {
 443                 break;
 444             }
 445
 446             /* Change the state to ON */
 447             ar->arWlanPowerState = WLAN_POWER_STATE_ON;
 448
 449                 /* Enable foreground scanning */
 450                 if ((status=wmi_scanparams_cmd(ar->arWmi, fg_start_period,
 451                                         ar->scParams.fg_end_period,
 452                                         ar->scParams.bg_period,
 453                                         ar->scParams.minact_chdwell_time,
 454                                         ar->scParams.maxact_chdwell_time,
 455                                         ar->scParams.pas_chdwell_time,
 456                                         ar->scParams.shortScanRatio,
 457                                         ar->scParams.scanCtrlFlags,
 458                                         ar->scParams.max_dfsch_act_time,
 459                                         ar->scParams.maxact_scan_per_ssid)) != 0)
 460                 {
 461                     break;
 462                 }
 463
 464             if (ar->arNetworkType != AP_NETWORK)
 465             {
 466                 if (ar->arSsidLen) {
 467                     if (ar6000_connect_to_ap(ar) != 0) {
 468                         /* no need to report error if connection failed */
 469                         break;
 470                     }
 471                 }
 472             }
 473         } else if (state == WLAN_DISABLED){
 474             WMI_SET_WOW_MODE_CMD wowMode = { .enable_wow = false };
 475
 476             /* Already in deep sleep state.. exit */
 477             if (ar->arWlanPowerState != WLAN_POWER_STATE_ON) {
 478                 if (ar->arWlanPowerState != WLAN_POWER_STATE_DEEP_SLEEP) {
 479                     AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("Strange state when we suspend for deep sleep %d\n", ar->arWlanPowerState));
 480                 }
 481                 break;
 482             }
 483
 484             if (ar->arNetworkType != AP_NETWORK)
 485             {
 486                 /* Disconnect from the AP and disable foreground scanning */
 487                 AR6000_SPIN_LOCK(&ar->arLock, 0);
 488                 if (ar->arConnected == true || ar->arConnectPending == true) {
 489                     AR6000_SPIN_UNLOCK(&ar->arLock, 0);
 490                     wmi_disconnect_cmd(ar->arWmi);
 491                 } else {
 492                     AR6000_SPIN_UNLOCK(&ar->arLock, 0);
 493                 }
 494             }
 495
 496             ar->scan_triggered = 0;
 497
 498             if ((status=wmi_scanparams_cmd(ar->arWmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 0, 0, 0)) != 0) {
 499                 break;
 500             }
 501
 502             /* make sure we disable wow for deep sleep */
 503             if ((status=wmi_set_wow_mode_cmd(ar->arWmi, &wowMode))!= 0)
 504             {
 505                 break;
 506             }
 507
 508             ar6000_TxDataCleanup(ar);
 509 #ifndef ATH6K_CONFIG_OTA_MODE
 510             wmi_powermode_cmd(ar->arWmi, REC_POWER);
 511 #endif
 512
 513             hostSleepMode.awake = false;
 514             hostSleepMode.asleep = true;
 515             if ((status=wmi_set_host_sleep_mode_cmd(ar->arWmi, &hostSleepMode))!= 0) {
 516                 break;
 517             }
 518             if (ar->arTxPending[ar->arControlEp]) {
 519                 u32 timeleft = wait_event_interruptible_timeout(arEvent,
 520                                 ar->arTxPending[ar->arControlEp] == 0, wmitimeout * HZ);
 521                 if (!timeleft || signal_pending(current)) {
 522                     status = A_ERROR;
 523                     break;
 524                 }
 525             }
 526             status = hifWaitForPendingRecv(ar->arHifDevice);
 527
 528             ar->arWlanPowerState = WLAN_POWER_STATE_DEEP_SLEEP;
 529         }
 530     } while (0);
 531
 532     if (status) {
 533         AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to enter/exit deep sleep %d\n", state));
 534     }
 535
 536     return status;
 537 }
 538
 539 int
 540 ar6000_update_wlan_pwr_state(struct ar6_softc *ar, AR6000_WLAN_STATE state, bool pmEvent)
 541 {
 542     int status = 0;
 543     u16 powerState, oldPowerState;
 544     AR6000_WLAN_STATE oldstate = ar->arWlanState;
 545     bool wlanOff = ar->arWlanOff;
 546 #ifdef CONFIG_PM
 547     bool btOff = ar->arBTOff;
 548 #endif /* CONFIG_PM */
 549
 550     if ((state!=WLAN_DISABLED && state!=WLAN_ENABLED)) {
 551         return A_ERROR;
 552     }
 553
 554     if (ar->bIsDestroyProgress) {
 555         return A_EBUSY;
 556     }
 557
 558     if (down_interruptible(&ar->arSem)) {
 559         return A_ERROR;
 560     }
 561
 562     if (ar->bIsDestroyProgress) {
 563         up(&ar->arSem);
 564         return A_EBUSY;
 565     }
 566
 567     ar->arWlanState = wlanOff ? WLAN_DISABLED : state;
 568     oldPowerState = ar->arWlanPowerState;
 569     if (state == WLAN_ENABLED) {
 570         powerState = ar->arWlanPowerState;
 571         AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("WLAN PWR set to ENABLE^^\n"));
 572         if (!wlanOff) {
 573             if (powerState == WLAN_POWER_STATE_DEEP_SLEEP) {
 574                 status = ar6000_setup_deep_sleep_state(ar, WLAN_ENABLED);
 575             } else if (powerState == WLAN_POWER_STATE_CUT_PWR) {
 576                 status = ar6000_setup_cut_power_state(ar, WLAN_ENABLED);
 577             }
 578         }
 579 #ifdef CONFIG_PM
 580         else if (pmEvent && wlanOff) {
 581             bool allowCutPwr = ((!ar->arBTSharing) || btOff);
 582             if ((powerState==WLAN_POWER_STATE_CUT_PWR) && (!allowCutPwr)) {
 583                 /* Come out of cut power */
 584                 ar6000_setup_cut_power_state(ar, WLAN_ENABLED);
 585                 status = ar6000_setup_deep_sleep_state(ar, WLAN_DISABLED);
 586             }
 587         }
 588 #endif /* CONFIG_PM */
 589     } else if (state == WLAN_DISABLED) {
 590         AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("WLAN PWR set to DISABLED~\n"));
 591         powerState = WLAN_POWER_STATE_DEEP_SLEEP;
 592 #ifdef CONFIG_PM
 593         if (pmEvent) {  /* disable due to suspend */
 594             bool suspendCutPwr = (ar->arSuspendConfig == WLAN_SUSPEND_CUT_PWR ||
 595                                     (ar->arSuspendConfig == WLAN_SUSPEND_WOW &&
 596                                         ar->arWow2Config==WLAN_SUSPEND_CUT_PWR));
 597             bool suspendCutIfBtOff = ((ar->arSuspendConfig ==
 598                                             WLAN_SUSPEND_CUT_PWR_IF_BT_OFF ||
 599                                         (ar->arSuspendConfig == WLAN_SUSPEND_WOW &&
 600                                          ar->arWow2Config==WLAN_SUSPEND_CUT_PWR_IF_BT_OFF)) &&
 601                                         (!ar->arBTSharing || btOff));
 602             if ((suspendCutPwr) ||
 603                 (suspendCutIfBtOff) ||
 604                 (ar->arWlanState==WLAN_POWER_STATE_CUT_PWR))
 605             {
 606                 powerState = WLAN_POWER_STATE_CUT_PWR;
 607             }
 608         } else {
 609             if ((wlanOff) &&
 610                 (ar->arWlanOffConfig == WLAN_OFF_CUT_PWR) &&
 611                 (!ar->arBTSharing || btOff))
 612             {
 613                 /* For BT clock sharing designs, CUT_POWER depend on BT state */
 614                 powerState = WLAN_POWER_STATE_CUT_PWR;
 615             }
 616         }
 617 #endif /* CONFIG_PM */
 618
 619         if (powerState == WLAN_POWER_STATE_DEEP_SLEEP) {
 620             if (ar->arWlanPowerState == WLAN_POWER_STATE_CUT_PWR) {
 621                 AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("Load firmware before set to deep sleep\n"));
 622                 ar6000_setup_cut_power_state(ar, WLAN_ENABLED);
 623             }
 624             status = ar6000_setup_deep_sleep_state(ar, WLAN_DISABLED);
 625         } else if (powerState == WLAN_POWER_STATE_CUT_PWR) {
 626             status = ar6000_setup_cut_power_state(ar, WLAN_DISABLED);
 627         }
 628
 629     }
 630
 631     if (status) {
 632         AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Fail to setup WLAN state %d\n", ar->arWlanState));
 633         ar->arWlanState = oldstate;
 634     } else if (status == 0) {
 635         WMI_REPORT_SLEEP_STATE_EVENT  wmiSleepEvent, *pSleepEvent = NULL;
 636         if ((ar->arWlanPowerState == WLAN_POWER_STATE_ON) && (oldPowerState != WLAN_POWER_STATE_ON)) {
 637             wmiSleepEvent.sleepState = WMI_REPORT_SLEEP_STATUS_IS_AWAKE;
 638             pSleepEvent = &wmiSleepEvent;
 639         } else if ((ar->arWlanPowerState != WLAN_POWER_STATE_ON) && (oldPowerState == WLAN_POWER_STATE_ON)) {
 640             wmiSleepEvent.sleepState = WMI_REPORT_SLEEP_STATUS_IS_DEEP_SLEEP;
 641             pSleepEvent = &wmiSleepEvent;
 642         }
 643         if (pSleepEvent) {
 644             AR_DEBUG_PRINTF(ATH_DEBUG_PM, ("SENT WLAN Sleep Event %d\n", wmiSleepEvent.sleepState));
 645             ar6000_send_event_to_app(ar, WMI_REPORT_SLEEP_STATE_EVENTID, (u8 *)pSleepEvent,
 646                                      sizeof(WMI_REPORT_SLEEP_STATE_EVENTID));
 647         }
 648     }
 649     up(&ar->arSem);
 650     return status;
 651 }
 652
 653 int
 654 ar6000_set_bt_hw_state(struct ar6_softc *ar, u32 enable)
 655 {
 656 #ifdef CONFIG_PM
 657     bool off = (enable == 0);
 658     int status;
 659     if (ar->arBTOff == off) {
 660         return 0;
 661     }
 662     ar->arBTOff = off;
 663     status = ar6000_update_wlan_pwr_state(ar, ar->arWlanOff ? WLAN_DISABLED : WLAN_ENABLED, false);
 664     return status;
 665 #else
 666     return 0;
 667 #endif
 668 }
 669
 670 int
 671 ar6000_set_wlan_state(struct ar6_softc *ar, AR6000_WLAN_STATE state)
 672 {
 673     int status;
 674     bool off = (state == WLAN_DISABLED);
 675     if (ar->arWlanOff == off) {
 676         return 0;
 677     }
 678     ar->arWlanOff = off;
 679     status = ar6000_update_wlan_pwr_state(ar, state, false);
 680     return status;
 681 }
 682
 683 void ar6000_pm_init()
 684 {
 685     A_REGISTER_MODULE_DEBUG_INFO(pm);
 686 #ifdef CONFIG_PM
 687     /*
 688      * Register ar6000_pm_device into system.
 689      * We should also add platform_device into the first item of array
 690      * of devices[] in file arch/xxx/mach-xxx/board-xxxx.c
 691      */
 692     if (platform_driver_register(&ar6000_pm_device)) {
 693         AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("ar6000: fail to register the power control driver.\n"));
 694     }
 695 #endif /* CONFIG_PM */
 696 }
 697
 698 void ar6000_pm_exit()
 699 {
 700 #ifdef CONFIG_PM
 701     platform_driver_unregister(&ar6000_pm_device);
 702 #endif /* CONFIG_PM */
 703 }