drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31 #include "rt2x00dump.h"
  32
  33 /*
  34  * Link tuning handlers
  35  */
  36 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  37 {
  38         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  39                 return;
  40
  41         /*
  42          * Reset link information.
  43          * Both the currently active vgc level as well as
  44          * the link tuner counter should be reset. Resetting
  45          * the counter is important for devices where the
  46          * device should only perform link tuning during the
  47          * first minute after being enabled.
  48          */
  49         rt2x00dev->link.count = 0;
  50         rt2x00dev->link.vgc_level = 0;
  51
  52         /*
  53          * Reset the link tuner.
  54          */
  55         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  56 }
  57
  58 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  59 {
  60         /*
  61          * Clear all (possibly) pre-existing quality statistics.
  62          */
  63         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  64
  65         /*
  66          * The RX and TX percentage should start at 50%
  67          * this will assure we will get at least get some
  68          * decent value when the link tuner starts.
  69          * The value will be dropped and overwritten with
  70          * the correct (measured )value anyway during the
  71          * first run of the link tuner.
  72          */
  73         rt2x00dev->link.qual.rx_percentage = 50;
  74         rt2x00dev->link.qual.tx_percentage = 50;
  75
  76         rt2x00lib_reset_link_tuner(rt2x00dev);
  77
  78         queue_delayed_work(rt2x00dev->hw->workqueue,
  79                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  80 }
  81
  82 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  83 {
  84         cancel_delayed_work_sync(&rt2x00dev->link.work);
  85 }
  86
  87 /*
  88  * Radio control handlers.
  89  */
  90 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  91 {
  92         int status;
  93
  94         /*
  95          * Don't enable the radio twice.
  96          * And check if the hardware button has been disabled.
  97          */
  98         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
  99             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
 100                 return 0;
 101
 102         /*
 103          * Initialize all data queues.
 104          */
 105         rt2x00queue_init_rx(rt2x00dev);
 106         rt2x00queue_init_tx(rt2x00dev);
 107
 108         /*
 109          * Enable radio.
 110          */
 111         status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 112                                                        STATE_RADIO_ON);
 113         if (status)
 114                 return status;
 115
 116         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 117
 118         /*
 119          * Enable RX.
 120          */
 121         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 122
 123         /*
 124          * Start the TX queues.
 125          */
 126         ieee80211_start_queues(rt2x00dev->hw);
 127
 128         return 0;
 129 }
 130
 131 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 132 {
 133         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 134                 return;
 135
 136         /*
 137          * Stop all scheduled work.
 138          */
 139         if (work_pending(&rt2x00dev->intf_work))
 140                 cancel_work_sync(&rt2x00dev->intf_work);
 141         if (work_pending(&rt2x00dev->filter_work))
 142                 cancel_work_sync(&rt2x00dev->filter_work);
 143
 144         /*
 145          * Stop the TX queues.
 146          */
 147         ieee80211_stop_queues(rt2x00dev->hw);
 148
 149         /*
 150          * Disable RX.
 151          */
 152         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 153
 154         /*
 155          * Disable radio.
 156          */
 157         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 158 }
 159
 160 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 161 {
 162         /*
 163          * When we are disabling the RX, we should also stop the link tuner.
 164          */
 165         if (state == STATE_RADIO_RX_OFF)
 166                 rt2x00lib_stop_link_tuner(rt2x00dev);
 167
 168         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 169
 170         /*
 171          * When we are enabling the RX, we should also start the link tuner.
 172          */
 173         if (state == STATE_RADIO_RX_ON &&
 174             (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
 175                 rt2x00lib_start_link_tuner(rt2x00dev);
 176 }
 177
 178 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 179 {
 180         enum antenna rx = rt2x00dev->link.ant.active.rx;
 181         enum antenna tx = rt2x00dev->link.ant.active.tx;
 182         int sample_a =
 183             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 184         int sample_b =
 185             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 186
 187         /*
 188          * We are done sampling. Now we should evaluate the results.
 189          */
 190         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 191
 192         /*
 193          * During the last period we have sampled the RSSI
 194          * from both antenna's. It now is time to determine
 195          * which antenna demonstrated the best performance.
 196          * When we are already on the antenna with the best
 197          * performance, then there really is nothing for us
 198          * left to do.
 199          */
 200         if (sample_a == sample_b)
 201                 return;
 202
 203         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 204                 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 205
 206         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 207                 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 208
 209         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 210 }
 211
 212 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 213 {
 214         enum antenna rx = rt2x00dev->link.ant.active.rx;
 215         enum antenna tx = rt2x00dev->link.ant.active.tx;
 216         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 217         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 218
 219         /*
 220          * Legacy driver indicates that we should swap antenna's
 221          * when the difference in RSSI is greater that 5. This
 222          * also should be done when the RSSI was actually better
 223          * then the previous sample.
 224          * When the difference exceeds the threshold we should
 225          * sample the rssi from the other antenna to make a valid
 226          * comparison between the 2 antennas.
 227          */
 228         if (abs(rssi_curr - rssi_old) < 5)
 229                 return;
 230
 231         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 232
 233         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 234                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 235
 236         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 237                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 238
 239         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 240 }
 241
 242 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 243 {
 244         /*
 245          * Determine if software diversity is enabled for
 246          * either the TX or RX antenna (or both).
 247          * Always perform this check since within the link
 248          * tuner interval the configuration might have changed.
 249          */
 250         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 251         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 252
 253         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 254             rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
 255                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 256         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 257             rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
 258                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 259
 260         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 261             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 262                 rt2x00dev->link.ant.flags = 0;
 263                 return;
 264         }
 265
 266         /*
 267          * If we have only sampled the data over the last period
 268          * we should now harvest the data. Otherwise just evaluate
 269          * the data. The latter should only be performed once
 270          * every 2 seconds.
 271          */
 272         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 273                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 274         else if (rt2x00dev->link.count & 1)
 275                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 276 }
 277
 278 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 279 {
 280         int avg_rssi = rssi;
 281
 282         /*
 283          * Update global RSSI
 284          */
 285         if (link->qual.avg_rssi)
 286                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 287         link->qual.avg_rssi = avg_rssi;
 288
 289         /*
 290          * Update antenna RSSI
 291          */
 292         if (link->ant.rssi_ant)
 293                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 294         link->ant.rssi_ant = rssi;
 295 }
 296
 297 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 298 {
 299         if (qual->rx_failed || qual->rx_success)
 300                 qual->rx_percentage =
 301                     (qual->rx_success * 100) /
 302                     (qual->rx_failed + qual->rx_success);
 303         else
 304                 qual->rx_percentage = 50;
 305
 306         if (qual->tx_failed || qual->tx_success)
 307                 qual->tx_percentage =
 308                     (qual->tx_success * 100) /
 309                     (qual->tx_failed + qual->tx_success);
 310         else
 311                 qual->tx_percentage = 50;
 312
 313         qual->rx_success = 0;
 314         qual->rx_failed = 0;
 315         qual->tx_success = 0;
 316         qual->tx_failed = 0;
 317 }
 318
 319 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 320                                            int rssi)
 321 {
 322         int rssi_percentage = 0;
 323         int signal;
 324
 325         /*
 326          * We need a positive value for the RSSI.
 327          */
 328         if (rssi < 0)
 329                 rssi += rt2x00dev->rssi_offset;
 330
 331         /*
 332          * Calculate the different percentages,
 333          * which will be used for the signal.
 334          */
 335         if (rt2x00dev->rssi_offset)
 336                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 337
 338         /*
 339          * Add the individual percentages and use the WEIGHT
 340          * defines to calculate the current link signal.
 341          */
 342         signal = ((WEIGHT_RSSI * rssi_percentage) +
 343                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 344                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 345
 346         return (signal > 100) ? 100 : signal;
 347 }
 348
 349 static void rt2x00lib_link_tuner(struct work_struct *work)
 350 {
 351         struct rt2x00_dev *rt2x00dev =
 352             container_of(work, struct rt2x00_dev, link.work.work);
 353
 354         /*
 355          * When the radio is shutting down we should
 356          * immediately cease all link tuning.
 357          */
 358         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 359                 return;
 360
 361         /*
 362          * Update statistics.
 363          */
 364         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 365         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 366             rt2x00dev->link.qual.rx_failed;
 367
 368         /*
 369          * Only perform the link tuning when Link tuning
 370          * has been enabled (This could have been disabled from the EEPROM).
 371          */
 372         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 373                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 374
 375         /*
 376          * Precalculate a portion of the link signal which is
 377          * in based on the tx/rx success/failure counters.
 378          */
 379         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 380
 381         /*
 382          * Send a signal to the led to update the led signal strength.
 383          */
 384         rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
 385
 386         /*
 387          * Evaluate antenna setup, make this the last step since this could
 388          * possibly reset some statistics.
 389          */
 390         rt2x00lib_evaluate_antenna(rt2x00dev);
 391
 392         /*
 393          * Increase tuner counter, and reschedule the next link tuner run.
 394          */
 395         rt2x00dev->link.count++;
 396         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 397                            LINK_TUNE_INTERVAL);
 398 }
 399
 400 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 401 {
 402         struct rt2x00_dev *rt2x00dev =
 403             container_of(work, struct rt2x00_dev, filter_work);
 404         unsigned int filter = rt2x00dev->packet_filter;
 405
 406         /*
 407          * Since we had stored the filter inside rt2x00dev->packet_filter,
 408          * we should now clear that field. Otherwise the driver will
 409          * assume nothing has changed (*total_flags will be compared
 410          * to rt2x00dev->packet_filter to determine if any action is required).
 411          */
 412         rt2x00dev->packet_filter = 0;
 413
 414         rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
 415                                              filter, &filter, 0, NULL);
 416 }
 417
 418 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 419                                           struct ieee80211_vif *vif)
 420 {
 421         struct rt2x00_dev *rt2x00dev = data;
 422         struct rt2x00_intf *intf = vif_to_intf(vif);
 423         struct sk_buff *skb;
 424         struct ieee80211_tx_control control;
 425         struct ieee80211_bss_conf conf;
 426         int delayed_flags;
 427
 428         /*
 429          * Copy all data we need during this action under the protection
 430          * of a spinlock. Otherwise race conditions might occur which results
 431          * into an invalid configuration.
 432          */
 433         spin_lock(&intf->lock);
 434
 435         memcpy(&conf, &intf->conf, sizeof(conf));
 436         delayed_flags = intf->delayed_flags;
 437         intf->delayed_flags = 0;
 438
 439         spin_unlock(&intf->lock);
 440
 441         if (delayed_flags & DELAYED_UPDATE_BEACON) {
 442                 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
 443                 if (skb) {
 444                         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 445                                                           &control);
 446                         dev_kfree_skb(skb);
 447                 }
 448         }
 449
 450         if (delayed_flags & DELAYED_CONFIG_ERP)
 451                 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
 452 }
 453
 454 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 455 {
 456         struct rt2x00_dev *rt2x00dev =
 457             container_of(work, struct rt2x00_dev, intf_work);
 458
 459         /*
 460          * Iterate over each interface and perform the
 461          * requested configurations.
 462          */
 463         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 464                                             rt2x00lib_intf_scheduled_iter,
 465                                             rt2x00dev);
 466 }
 467
 468 /*
 469  * Interrupt context handlers.
 470  */
 471 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 472                                       struct ieee80211_vif *vif)
 473 {
 474         struct rt2x00_intf *intf = vif_to_intf(vif);
 475
 476         if (vif->type != IEEE80211_IF_TYPE_AP &&
 477             vif->type != IEEE80211_IF_TYPE_IBSS)
 478                 return;
 479
 480         spin_lock(&intf->lock);
 481         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 482         spin_unlock(&intf->lock);
 483 }
 484
 485 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 486 {
 487         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 488                 return;
 489
 490         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 491                                             rt2x00lib_beacondone_iter,
 492                                             rt2x00dev);
 493
 494         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 495 }
 496 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 497
 498 void rt2x00lib_txdone(struct queue_entry *entry,
 499                       struct txdone_entry_desc *txdesc)
 500 {
 501         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 502         struct skb_frame_desc *skbdesc;
 503         struct ieee80211_tx_status tx_status;
 504         int success = !!(txdesc->status == TX_SUCCESS ||
 505                          txdesc->status == TX_SUCCESS_RETRY);
 506         int fail = !!(txdesc->status == TX_FAIL_RETRY ||
 507                       txdesc->status == TX_FAIL_INVALID ||
 508                       txdesc->status == TX_FAIL_OTHER);
 509
 510         /*
 511          * Update TX statistics.
 512          */
 513         rt2x00dev->link.qual.tx_success += success;
 514         rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
 515
 516         /*
 517          * Initialize TX status
 518          */
 519         tx_status.flags = 0;
 520         tx_status.ack_signal = 0;
 521         tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
 522         tx_status.retry_count = txdesc->retry;
 523         memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
 524
 525         if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 526                 if (success)
 527                         tx_status.flags |= IEEE80211_TX_STATUS_ACK;
 528                 else
 529                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 530         }
 531
 532         tx_status.queue_length = entry->queue->limit;
 533         tx_status.queue_number = tx_status.control.queue;
 534
 535         if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 536                 if (success)
 537                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 538                 else
 539                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 540         }
 541
 542         /*
 543          * Send the tx_status to debugfs. Only send the status report
 544          * to mac80211 when the frame originated from there. If this was
 545          * a extra frame coming through a mac80211 library call (RTS/CTS)
 546          * then we should not send the status report back.
 547          * If send to mac80211, mac80211 will clean up the skb structure,
 548          * otherwise we have to do it ourself.
 549          */
 550         skbdesc = get_skb_frame_desc(entry->skb);
 551         skbdesc->frame_type = DUMP_FRAME_TXDONE;
 552
 553         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 554
 555         if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
 556                 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
 557                                             entry->skb, &tx_status);
 558         else
 559                 dev_kfree_skb(entry->skb);
 560         entry->skb = NULL;
 561 }
 562 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 563
 564 void rt2x00lib_rxdone(struct queue_entry *entry,
 565                       struct rxdone_entry_desc *rxdesc)
 566 {
 567         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 568         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 569         struct ieee80211_supported_band *sband;
 570         struct ieee80211_hdr *hdr;
 571         const struct rt2x00_rate *rate;
 572         unsigned int i;
 573         int idx = -1;
 574         u16 fc;
 575
 576         /*
 577          * Update RX statistics.
 578          */
 579         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 580         for (i = 0; i < sband->n_bitrates; i++) {
 581                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 582
 583                 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 584                      (rate->plcp == rxdesc->signal)) ||
 585                     (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 586                       (rate->bitrate == rxdesc->signal))) {
 587                         idx = i;
 588                         break;
 589                 }
 590         }
 591
 592         if (idx < 0) {
 593                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 594                         "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
 595                         !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
 596                 idx = 0;
 597         }
 598
 599         /*
 600          * Only update link status if this is a beacon frame carrying our bssid.
 601          */
 602         hdr = (struct ieee80211_hdr *)entry->skb->data;
 603         fc = le16_to_cpu(hdr->frame_control);
 604         if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
 605                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
 606
 607         rt2x00dev->link.qual.rx_success++;
 608
 609         rx_status->rate_idx = idx;
 610         rx_status->signal =
 611             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
 612         rx_status->ssi = rxdesc->rssi;
 613         rx_status->flag = rxdesc->flags;
 614         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 615
 616         /*
 617          * Send frame to mac80211 & debugfs.
 618          * mac80211 will clean up the skb structure.
 619          */
 620         get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
 621         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 622         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 623         entry->skb = NULL;
 624 }
 625 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 626
 627 /*
 628  * TX descriptor initializer
 629  */
 630 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 631                              struct sk_buff *skb,
 632                              struct ieee80211_tx_control *control)
 633 {
 634         struct txentry_desc txdesc;
 635         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 636         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
 637         const struct rt2x00_rate *rate;
 638         int tx_rate;
 639         int length;
 640         int duration;
 641         int residual;
 642         u16 frame_control;
 643         u16 seq_ctrl;
 644
 645         memset(&txdesc, 0, sizeof(txdesc));
 646
 647         txdesc.queue = skbdesc->entry->queue->qid;
 648         txdesc.cw_min = skbdesc->entry->queue->cw_min;
 649         txdesc.cw_max = skbdesc->entry->queue->cw_max;
 650         txdesc.aifs = skbdesc->entry->queue->aifs;
 651
 652         /*
 653          * Read required fields from ieee80211 header.
 654          */
 655         frame_control = le16_to_cpu(hdr->frame_control);
 656         seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
 657
 658         tx_rate = control->tx_rate->hw_value;
 659
 660         /*
 661          * Check whether this frame is to be acked
 662          */
 663         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 664                 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 665
 666         /*
 667          * Check if this is a RTS/CTS frame
 668          */
 669         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 670                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 671                 if (is_rts_frame(frame_control)) {
 672                         __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
 673                         __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 674                 } else
 675                         __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
 676                 if (control->rts_cts_rate)
 677                         tx_rate = control->rts_cts_rate->hw_value;
 678         }
 679
 680         rate = rt2x00_get_rate(tx_rate);
 681
 682         /*
 683          * Check if more fragments are pending
 684          */
 685         if (ieee80211_get_morefrag(hdr)) {
 686                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 687                 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
 688         }
 689
 690         /*
 691          * Beacons and probe responses require the tsf timestamp
 692          * to be inserted into the frame.
 693          */
 694         if (control->queue == RT2X00_BCN_QUEUE_BEACON ||
 695             is_probe_resp(frame_control))
 696                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
 697
 698         /*
 699          * Determine with what IFS priority this frame should be send.
 700          * Set ifs to IFS_SIFS when the this is not the first fragment,
 701          * or this fragment came after RTS/CTS.
 702          */
 703         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 704             test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
 705                 txdesc.ifs = IFS_SIFS;
 706         else
 707                 txdesc.ifs = IFS_BACKOFF;
 708
 709         /*
 710          * PLCP setup
 711          * Length calculation depends on OFDM/CCK rate.
 712          */
 713         txdesc.signal = rate->plcp;
 714         txdesc.service = 0x04;
 715
 716         length = skbdesc->data_len + FCS_LEN;
 717         if (rate->flags & DEV_RATE_OFDM) {
 718                 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
 719
 720                 txdesc.length_high = (length >> 6) & 0x3f;
 721                 txdesc.length_low = length & 0x3f;
 722         } else {
 723                 /*
 724                  * Convert length to microseconds.
 725                  */
 726                 residual = get_duration_res(length, rate->bitrate);
 727                 duration = get_duration(length, rate->bitrate);
 728
 729                 if (residual != 0) {
 730                         duration++;
 731
 732                         /*
 733                          * Check if we need to set the Length Extension
 734                          */
 735                         if (rate->bitrate == 110 && residual <= 30)
 736                                 txdesc.service |= 0x80;
 737                 }
 738
 739                 txdesc.length_high = (duration >> 8) & 0xff;
 740                 txdesc.length_low = duration & 0xff;
 741
 742                 /*
 743                  * When preamble is enabled we should set the
 744                  * preamble bit for the signal.
 745                  */
 746                 if (rt2x00_get_rate_preamble(tx_rate))
 747                         txdesc.signal |= 0x08;
 748         }
 749
 750         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
 751
 752         /*
 753          * Update queue entry.
 754          */
 755         skbdesc->entry->skb = skb;
 756
 757         /*
 758          * The frame has been completely initialized and ready
 759          * for sending to the device. The caller will push the
 760          * frame to the device, but we are going to push the
 761          * frame to debugfs here.
 762          */
 763         skbdesc->frame_type = DUMP_FRAME_TX;
 764         rt2x00debug_dump_frame(rt2x00dev, skb);
 765 }
 766 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 767
 768 /*
 769  * Driver initialization handlers.
 770  */
 771 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 772         {
 773                 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
 774                 .bitrate = 10,
 775                 .ratemask = BIT(0),
 776                 .plcp = 0x00,
 777         },
 778         {
 779                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 780                 .bitrate = 20,
 781                 .ratemask = BIT(1),
 782                 .plcp = 0x01,
 783         },
 784         {
 785                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 786                 .bitrate = 55,
 787                 .ratemask = BIT(2),
 788                 .plcp = 0x02,
 789         },
 790         {
 791                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 792                 .bitrate = 110,
 793                 .ratemask = BIT(3),
 794                 .plcp = 0x03,
 795         },
 796         {
 797                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 798                 .bitrate = 60,
 799                 .ratemask = BIT(4),
 800                 .plcp = 0x0b,
 801         },
 802         {
 803                 .flags = DEV_RATE_OFDM,
 804                 .bitrate = 90,
 805                 .ratemask = BIT(5),
 806                 .plcp = 0x0f,
 807         },
 808         {
 809                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 810                 .bitrate = 120,
 811                 .ratemask = BIT(6),
 812                 .plcp = 0x0a,
 813         },
 814         {
 815                 .flags = DEV_RATE_OFDM,
 816                 .bitrate = 180,
 817                 .ratemask = BIT(7),
 818                 .plcp = 0x0e,
 819         },
 820         {
 821                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 822                 .bitrate = 240,
 823                 .ratemask = BIT(8),
 824                 .plcp = 0x09,
 825         },
 826         {
 827                 .flags = DEV_RATE_OFDM,
 828                 .bitrate = 360,
 829                 .ratemask = BIT(9),
 830                 .plcp = 0x0d,
 831         },
 832         {
 833                 .flags = DEV_RATE_OFDM,
 834                 .bitrate = 480,
 835                 .ratemask = BIT(10),
 836                 .plcp = 0x08,
 837         },
 838         {
 839                 .flags = DEV_RATE_OFDM,
 840                 .bitrate = 540,
 841                 .ratemask = BIT(11),
 842                 .plcp = 0x0c,
 843         },
 844 };
 845
 846 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 847                               const int channel, const int tx_power,
 848                               const int value)
 849 {
 850         entry->center_freq = ieee80211_channel_to_frequency(channel);
 851         entry->hw_value = value;
 852         entry->max_power = tx_power;
 853         entry->max_antenna_gain = 0xff;
 854 }
 855
 856 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 857                            const u16 index, const struct rt2x00_rate *rate)
 858 {
 859         entry->flags = 0;
 860         entry->bitrate = rate->bitrate;
 861         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 862         entry->hw_value_short = entry->hw_value;
 863
 864         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 865                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 866                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 867         }
 868 }
 869
 870 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 871                                     struct hw_mode_spec *spec)
 872 {
 873         struct ieee80211_hw *hw = rt2x00dev->hw;
 874         struct ieee80211_channel *channels;
 875         struct ieee80211_rate *rates;
 876         unsigned int num_rates;
 877         unsigned int i;
 878         unsigned char tx_power;
 879
 880         num_rates = 0;
 881         if (spec->supported_rates & SUPPORT_RATE_CCK)
 882                 num_rates += 4;
 883         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 884                 num_rates += 8;
 885
 886         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 887         if (!channels)
 888                 return -ENOMEM;
 889
 890         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 891         if (!rates)
 892                 goto exit_free_channels;
 893
 894         /*
 895          * Initialize Rate list.
 896          */
 897         for (i = 0; i < num_rates; i++)
 898                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 899
 900         /*
 901          * Initialize Channel list.
 902          */
 903         for (i = 0; i < spec->num_channels; i++) {
 904                 if (spec->channels[i].channel <= 14) {
 905                         if (spec->tx_power_bg)
 906                                 tx_power = spec->tx_power_bg[i];
 907                         else
 908                                 tx_power = spec->tx_power_default;
 909                 } else {
 910                         if (spec->tx_power_a)
 911                                 tx_power = spec->tx_power_a[i];
 912                         else
 913                                 tx_power = spec->tx_power_default;
 914                 }
 915
 916                 rt2x00lib_channel(&channels[i],
 917                                   spec->channels[i].channel, tx_power, i);
 918         }
 919
 920         /*
 921          * Intitialize 802.11b, 802.11g
 922          * Rates: CCK, OFDM.
 923          * Channels: 2.4 GHz
 924          */
 925         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 926                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 927                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 928                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 929                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 930                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 931                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 932         }
 933
 934         /*
 935          * Intitialize 802.11a
 936          * Rates: OFDM.
 937          * Channels: OFDM, UNII, HiperLAN2.
 938          */
 939         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 940                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 941                     spec->num_channels - 14;
 942                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 943                     num_rates - 4;
 944                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 945                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 946                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 947                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 948         }
 949
 950         return 0;
 951
 952  exit_free_channels:
 953         kfree(channels);
 954         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 955         return -ENOMEM;
 956 }
 957
 958 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 959 {
 960         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 961                 ieee80211_unregister_hw(rt2x00dev->hw);
 962
 963         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 964                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 965                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 966                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 967                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 968         }
 969 }
 970
 971 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 972 {
 973         struct hw_mode_spec *spec = &rt2x00dev->spec;
 974         int status;
 975
 976         /*
 977          * Initialize HW modes.
 978          */
 979         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 980         if (status)
 981                 return status;
 982
 983         /*
 984          * Register HW.
 985          */
 986         status = ieee80211_register_hw(rt2x00dev->hw);
 987         if (status) {
 988                 rt2x00lib_remove_hw(rt2x00dev);
 989                 return status;
 990         }
 991
 992         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 993
 994         return 0;
 995 }
 996
 997 /*
 998  * Initialization/uninitialization handlers.
 999  */
1000 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
1001 {
1002         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1003                 return;
1004
1005         /*
1006          * Unregister extra components.
1007          */
1008         rt2x00rfkill_unregister(rt2x00dev);
1009
1010         /*
1011          * Allow the HW to uninitialize.
1012          */
1013         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1014
1015         /*
1016          * Free allocated queue entries.
1017          */
1018         rt2x00queue_uninitialize(rt2x00dev);
1019 }
1020
1021 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1022 {
1023         int status;
1024
1025         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1026                 return 0;
1027
1028         /*
1029          * Allocate all queue entries.
1030          */
1031         status = rt2x00queue_initialize(rt2x00dev);
1032         if (status)
1033                 return status;
1034
1035         /*
1036          * Initialize the device.
1037          */
1038         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1039         if (status)
1040                 goto exit;
1041
1042         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1043
1044         /*
1045          * Register the extra components.
1046          */
1047         rt2x00rfkill_register(rt2x00dev);
1048
1049         return 0;
1050
1051 exit:
1052         rt2x00lib_uninitialize(rt2x00dev);
1053
1054         return status;
1055 }
1056
1057 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1058 {
1059         int retval;
1060
1061         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1062                 return 0;
1063
1064         /*
1065          * If this is the first interface which is added,
1066          * we should load the firmware now.
1067          */
1068         retval = rt2x00lib_load_firmware(rt2x00dev);
1069         if (retval)
1070                 return retval;
1071
1072         /*
1073          * Initialize the device.
1074          */
1075         retval = rt2x00lib_initialize(rt2x00dev);
1076         if (retval)
1077                 return retval;
1078
1079         /*
1080          * Enable radio.
1081          */
1082         retval = rt2x00lib_enable_radio(rt2x00dev);
1083         if (retval) {
1084                 rt2x00lib_uninitialize(rt2x00dev);
1085                 return retval;
1086         }
1087
1088         rt2x00dev->intf_ap_count = 0;
1089         rt2x00dev->intf_sta_count = 0;
1090         rt2x00dev->intf_associated = 0;
1091
1092         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1093
1094         return 0;
1095 }
1096
1097 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1098 {
1099         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1100                 return;
1101
1102         /*
1103          * Perhaps we can add something smarter here,
1104          * but for now just disabling the radio should do.
1105          */
1106         rt2x00lib_disable_radio(rt2x00dev);
1107
1108         rt2x00dev->intf_ap_count = 0;
1109         rt2x00dev->intf_sta_count = 0;
1110         rt2x00dev->intf_associated = 0;
1111
1112         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1113 }
1114
1115 /*
1116  * driver allocation handlers.
1117  */
1118 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1119 {
1120         int retval = -ENOMEM;
1121
1122         /*
1123          * Make room for rt2x00_intf inside the per-interface
1124          * structure ieee80211_vif.
1125          */
1126         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1127
1128         /*
1129          * Let the driver probe the device to detect the capabilities.
1130          */
1131         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1132         if (retval) {
1133                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1134                 goto exit;
1135         }
1136
1137         /*
1138          * Initialize configuration work.
1139          */
1140         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1141         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1142         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1143
1144         /*
1145          * Allocate queue array.
1146          */
1147         retval = rt2x00queue_allocate(rt2x00dev);
1148         if (retval)
1149                 goto exit;
1150
1151         /*
1152          * Initialize ieee80211 structure.
1153          */
1154         retval = rt2x00lib_probe_hw(rt2x00dev);
1155         if (retval) {
1156                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1157                 goto exit;
1158         }
1159
1160         /*
1161          * Register extra components.
1162          */
1163         rt2x00leds_register(rt2x00dev);
1164         rt2x00rfkill_allocate(rt2x00dev);
1165         rt2x00debug_register(rt2x00dev);
1166
1167         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1168
1169         return 0;
1170
1171 exit:
1172         rt2x00lib_remove_dev(rt2x00dev);
1173
1174         return retval;
1175 }
1176 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1177
1178 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1179 {
1180         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1181
1182         /*
1183          * Disable radio.
1184          */
1185         rt2x00lib_disable_radio(rt2x00dev);
1186
1187         /*
1188          * Uninitialize device.
1189          */
1190         rt2x00lib_uninitialize(rt2x00dev);
1191
1192         /*
1193          * Free extra components
1194          */
1195         rt2x00debug_deregister(rt2x00dev);
1196         rt2x00rfkill_free(rt2x00dev);
1197         rt2x00leds_unregister(rt2x00dev);
1198
1199         /*
1200          * Free ieee80211_hw memory.
1201          */
1202         rt2x00lib_remove_hw(rt2x00dev);
1203
1204         /*
1205          * Free firmware image.
1206          */
1207         rt2x00lib_free_firmware(rt2x00dev);
1208
1209         /*
1210          * Free queue structures.
1211          */
1212         rt2x00queue_free(rt2x00dev);
1213 }
1214 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1215
1216 /*
1217  * Device state handlers
1218  */
1219 #ifdef CONFIG_PM
1220 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1221 {
1222         int retval;
1223
1224         NOTICE(rt2x00dev, "Going to sleep.\n");
1225         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1226
1227         /*
1228          * Only continue if mac80211 has open interfaces.
1229          */
1230         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1231                 goto exit;
1232         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1233
1234         /*
1235          * Disable radio.
1236          */
1237         rt2x00lib_stop(rt2x00dev);
1238         rt2x00lib_uninitialize(rt2x00dev);
1239
1240         /*
1241          * Suspend/disable extra components.
1242          */
1243         rt2x00leds_suspend(rt2x00dev);
1244         rt2x00rfkill_suspend(rt2x00dev);
1245         rt2x00debug_deregister(rt2x00dev);
1246
1247 exit:
1248         /*
1249          * Set device mode to sleep for power management.
1250          */
1251         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1252         if (retval)
1253                 return retval;
1254
1255         return 0;
1256 }
1257 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1258
1259 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1260                                   struct ieee80211_vif *vif)
1261 {
1262         struct rt2x00_dev *rt2x00dev = data;
1263         struct rt2x00_intf *intf = vif_to_intf(vif);
1264
1265         spin_lock(&intf->lock);
1266
1267         rt2x00lib_config_intf(rt2x00dev, intf,
1268                               vif->type, intf->mac, intf->bssid);
1269
1270
1271         /*
1272          * Master or Ad-hoc mode require a new beacon update.
1273          */
1274         if (vif->type == IEEE80211_IF_TYPE_AP ||
1275             vif->type == IEEE80211_IF_TYPE_IBSS)
1276                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1277
1278         spin_unlock(&intf->lock);
1279 }
1280
1281 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1282 {
1283         int retval;
1284
1285         NOTICE(rt2x00dev, "Waking up.\n");
1286
1287         /*
1288          * Restore/enable extra components.
1289          */
1290         rt2x00debug_register(rt2x00dev);
1291         rt2x00rfkill_resume(rt2x00dev);
1292         rt2x00leds_resume(rt2x00dev);
1293
1294         /*
1295          * Only continue if mac80211 had open interfaces.
1296          */
1297         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1298                 return 0;
1299
1300         /*
1301          * Reinitialize device and all active interfaces.
1302          */
1303         retval = rt2x00lib_start(rt2x00dev);
1304         if (retval)
1305                 goto exit;
1306
1307         /*
1308          * Reconfigure device.
1309          */
1310         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1311         if (!rt2x00dev->hw->conf.radio_enabled)
1312                 rt2x00lib_disable_radio(rt2x00dev);
1313
1314         /*
1315          * Iterator over each active interface to
1316          * reconfigure the hardware.
1317          */
1318         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1319                                             rt2x00lib_resume_intf, rt2x00dev);
1320
1321         /*
1322          * We are ready again to receive requests from mac80211.
1323          */
1324         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1325
1326         /*
1327          * It is possible that during that mac80211 has attempted
1328          * to send frames while we were suspending or resuming.
1329          * In that case we have disabled the TX queue and should
1330          * now enable it again
1331          */
1332         ieee80211_start_queues(rt2x00dev->hw);
1333
1334         /*
1335          * During interface iteration we might have changed the
1336          * delayed_flags, time to handles the event by calling
1337          * the work handler directly.
1338          */
1339         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1340
1341         return 0;
1342
1343 exit:
1344         rt2x00lib_disable_radio(rt2x00dev);
1345         rt2x00lib_uninitialize(rt2x00dev);
1346         rt2x00debug_deregister(rt2x00dev);
1347
1348         return retval;
1349 }
1350 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1351 #endif /* CONFIG_PM */
1352
1353 /*
1354  * rt2x00lib module information.
1355  */
1356 MODULE_AUTHOR(DRV_PROJECT);
1357 MODULE_VERSION(DRV_VERSION);
1358 MODULE_DESCRIPTION("rt2x00 library");
1359 MODULE_LICENSE("GPL");