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 =
 112             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
 113         if (status)
 114                 return status;
 115
 116         rt2x00leds_led_radio(rt2x00dev, true);
 117         rt2x00led_led_activity(rt2x00dev, true);
 118
 119         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 120
 121         /*
 122          * Enable RX.
 123          */
 124         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 125
 126         /*
 127          * Start the TX queues.
 128          */
 129         ieee80211_start_queues(rt2x00dev->hw);
 130
 131         return 0;
 132 }
 133
 134 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 135 {
 136         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 137                 return;
 138
 139         /*
 140          * Stop all scheduled work.
 141          */
 142         if (work_pending(&rt2x00dev->intf_work))
 143                 cancel_work_sync(&rt2x00dev->intf_work);
 144         if (work_pending(&rt2x00dev->filter_work))
 145                 cancel_work_sync(&rt2x00dev->filter_work);
 146
 147         /*
 148          * Stop the TX queues.
 149          */
 150         ieee80211_stop_queues(rt2x00dev->hw);
 151
 152         /*
 153          * Disable RX.
 154          */
 155         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 156
 157         /*
 158          * Disable radio.
 159          */
 160         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 161         rt2x00led_led_activity(rt2x00dev, false);
 162         rt2x00leds_led_radio(rt2x00dev, false);
 163 }
 164
 165 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 166 {
 167         /*
 168          * When we are disabling the RX, we should also stop the link tuner.
 169          */
 170         if (state == STATE_RADIO_RX_OFF)
 171                 rt2x00lib_stop_link_tuner(rt2x00dev);
 172
 173         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 174
 175         /*
 176          * When we are enabling the RX, we should also start the link tuner.
 177          */
 178         if (state == STATE_RADIO_RX_ON &&
 179             (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
 180                 rt2x00lib_start_link_tuner(rt2x00dev);
 181 }
 182
 183 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 184 {
 185         enum antenna rx = rt2x00dev->link.ant.active.rx;
 186         enum antenna tx = rt2x00dev->link.ant.active.tx;
 187         int sample_a =
 188             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 189         int sample_b =
 190             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 191
 192         /*
 193          * We are done sampling. Now we should evaluate the results.
 194          */
 195         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 196
 197         /*
 198          * During the last period we have sampled the RSSI
 199          * from both antenna's. It now is time to determine
 200          * which antenna demonstrated the best performance.
 201          * When we are already on the antenna with the best
 202          * performance, then there really is nothing for us
 203          * left to do.
 204          */
 205         if (sample_a == sample_b)
 206                 return;
 207
 208         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 209                 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 210
 211         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 212                 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 213
 214         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 215 }
 216
 217 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 218 {
 219         enum antenna rx = rt2x00dev->link.ant.active.rx;
 220         enum antenna tx = rt2x00dev->link.ant.active.tx;
 221         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 222         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 223
 224         /*
 225          * Legacy driver indicates that we should swap antenna's
 226          * when the difference in RSSI is greater that 5. This
 227          * also should be done when the RSSI was actually better
 228          * then the previous sample.
 229          * When the difference exceeds the threshold we should
 230          * sample the rssi from the other antenna to make a valid
 231          * comparison between the 2 antennas.
 232          */
 233         if (abs(rssi_curr - rssi_old) < 5)
 234                 return;
 235
 236         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 237
 238         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 239                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 240
 241         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 242                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 243
 244         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 245 }
 246
 247 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 248 {
 249         /*
 250          * Determine if software diversity is enabled for
 251          * either the TX or RX antenna (or both).
 252          * Always perform this check since within the link
 253          * tuner interval the configuration might have changed.
 254          */
 255         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 256         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 257
 258         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 259             rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
 260                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 261         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 262             rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
 263                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 264
 265         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 266             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 267                 rt2x00dev->link.ant.flags = 0;
 268                 return;
 269         }
 270
 271         /*
 272          * If we have only sampled the data over the last period
 273          * we should now harvest the data. Otherwise just evaluate
 274          * the data. The latter should only be performed once
 275          * every 2 seconds.
 276          */
 277         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 278                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 279         else if (rt2x00dev->link.count & 1)
 280                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 281 }
 282
 283 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 284 {
 285         int avg_rssi = rssi;
 286
 287         /*
 288          * Update global RSSI
 289          */
 290         if (link->qual.avg_rssi)
 291                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 292         link->qual.avg_rssi = avg_rssi;
 293
 294         /*
 295          * Update antenna RSSI
 296          */
 297         if (link->ant.rssi_ant)
 298                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 299         link->ant.rssi_ant = rssi;
 300 }
 301
 302 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 303 {
 304         if (qual->rx_failed || qual->rx_success)
 305                 qual->rx_percentage =
 306                     (qual->rx_success * 100) /
 307                     (qual->rx_failed + qual->rx_success);
 308         else
 309                 qual->rx_percentage = 50;
 310
 311         if (qual->tx_failed || qual->tx_success)
 312                 qual->tx_percentage =
 313                     (qual->tx_success * 100) /
 314                     (qual->tx_failed + qual->tx_success);
 315         else
 316                 qual->tx_percentage = 50;
 317
 318         qual->rx_success = 0;
 319         qual->rx_failed = 0;
 320         qual->tx_success = 0;
 321         qual->tx_failed = 0;
 322 }
 323
 324 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 325                                            int rssi)
 326 {
 327         int rssi_percentage = 0;
 328         int signal;
 329
 330         /*
 331          * We need a positive value for the RSSI.
 332          */
 333         if (rssi < 0)
 334                 rssi += rt2x00dev->rssi_offset;
 335
 336         /*
 337          * Calculate the different percentages,
 338          * which will be used for the signal.
 339          */
 340         if (rt2x00dev->rssi_offset)
 341                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 342
 343         /*
 344          * Add the individual percentages and use the WEIGHT
 345          * defines to calculate the current link signal.
 346          */
 347         signal = ((WEIGHT_RSSI * rssi_percentage) +
 348                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 349                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 350
 351         return (signal > 100) ? 100 : signal;
 352 }
 353
 354 static void rt2x00lib_link_tuner(struct work_struct *work)
 355 {
 356         struct rt2x00_dev *rt2x00dev =
 357             container_of(work, struct rt2x00_dev, link.work.work);
 358
 359         /*
 360          * When the radio is shutting down we should
 361          * immediately cease all link tuning.
 362          */
 363         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 364                 return;
 365
 366         /*
 367          * Update statistics.
 368          */
 369         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 370         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 371             rt2x00dev->link.qual.rx_failed;
 372
 373         /*
 374          * Only perform the link tuning when Link tuning
 375          * has been enabled (This could have been disabled from the EEPROM).
 376          */
 377         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 378                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 379
 380         /*
 381          * Precalculate a portion of the link signal which is
 382          * in based on the tx/rx success/failure counters.
 383          */
 384         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 385
 386         /*
 387          * Send a signal to the led to update the led signal strength.
 388          */
 389         rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
 390
 391         /*
 392          * Evaluate antenna setup, make this the last step since this could
 393          * possibly reset some statistics.
 394          */
 395         rt2x00lib_evaluate_antenna(rt2x00dev);
 396
 397         /*
 398          * Increase tuner counter, and reschedule the next link tuner run.
 399          */
 400         rt2x00dev->link.count++;
 401         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 402                            LINK_TUNE_INTERVAL);
 403 }
 404
 405 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 406 {
 407         struct rt2x00_dev *rt2x00dev =
 408             container_of(work, struct rt2x00_dev, filter_work);
 409
 410         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 411 }
 412
 413 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 414                                           struct ieee80211_vif *vif)
 415 {
 416         struct rt2x00_dev *rt2x00dev = data;
 417         struct rt2x00_intf *intf = vif_to_intf(vif);
 418         struct sk_buff *skb;
 419         struct ieee80211_tx_control control;
 420         struct ieee80211_bss_conf conf;
 421         int delayed_flags;
 422
 423         /*
 424          * Copy all data we need during this action under the protection
 425          * of a spinlock. Otherwise race conditions might occur which results
 426          * into an invalid configuration.
 427          */
 428         spin_lock(&intf->lock);
 429
 430         memcpy(&conf, &intf->conf, sizeof(conf));
 431         delayed_flags = intf->delayed_flags;
 432         intf->delayed_flags = 0;
 433
 434         spin_unlock(&intf->lock);
 435
 436         if (delayed_flags & DELAYED_UPDATE_BEACON) {
 437                 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
 438                 if (skb && rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
 439                                                              skb, &control))
 440                         dev_kfree_skb(skb);
 441         }
 442
 443         if (delayed_flags & DELAYED_CONFIG_ERP)
 444                 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
 445
 446         if (delayed_flags & DELAYED_LED_ASSOC)
 447                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 448 }
 449
 450 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 451 {
 452         struct rt2x00_dev *rt2x00dev =
 453             container_of(work, struct rt2x00_dev, intf_work);
 454
 455         /*
 456          * Iterate over each interface and perform the
 457          * requested configurations.
 458          */
 459         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 460                                             rt2x00lib_intf_scheduled_iter,
 461                                             rt2x00dev);
 462 }
 463
 464 /*
 465  * Interrupt context handlers.
 466  */
 467 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 468                                       struct ieee80211_vif *vif)
 469 {
 470         struct rt2x00_intf *intf = vif_to_intf(vif);
 471
 472         if (vif->type != IEEE80211_IF_TYPE_AP &&
 473             vif->type != IEEE80211_IF_TYPE_IBSS)
 474                 return;
 475
 476         spin_lock(&intf->lock);
 477         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 478         spin_unlock(&intf->lock);
 479 }
 480
 481 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 482 {
 483         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 484                 return;
 485
 486         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 487                                             rt2x00lib_beacondone_iter,
 488                                             rt2x00dev);
 489
 490         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 491 }
 492 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 493
 494 void rt2x00lib_txdone(struct queue_entry *entry,
 495                       struct txdone_entry_desc *txdesc)
 496 {
 497         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 498         struct skb_frame_desc *skbdesc;
 499         struct ieee80211_tx_status tx_status;
 500         int success = !!(txdesc->status == TX_SUCCESS ||
 501                          txdesc->status == TX_SUCCESS_RETRY);
 502         int fail = !!(txdesc->status == TX_FAIL_RETRY ||
 503                       txdesc->status == TX_FAIL_INVALID ||
 504                       txdesc->status == TX_FAIL_OTHER);
 505
 506         /*
 507          * Update TX statistics.
 508          */
 509         rt2x00dev->link.qual.tx_success += success;
 510         rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
 511
 512         /*
 513          * Initialize TX status
 514          */
 515         tx_status.flags = 0;
 516         tx_status.ack_signal = 0;
 517         tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
 518         tx_status.retry_count = txdesc->retry;
 519         memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
 520
 521         if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 522                 if (success)
 523                         tx_status.flags |= IEEE80211_TX_STATUS_ACK;
 524                 else
 525                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 526         }
 527
 528         if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 529                 if (success)
 530                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 531                 else
 532                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 533         }
 534
 535         /*
 536          * Send the tx_status to debugfs. Only send the status report
 537          * to mac80211 when the frame originated from there. If this was
 538          * a extra frame coming through a mac80211 library call (RTS/CTS)
 539          * then we should not send the status report back.
 540          * If send to mac80211, mac80211 will clean up the skb structure,
 541          * otherwise we have to do it ourself.
 542          */
 543         skbdesc = get_skb_frame_desc(entry->skb);
 544         skbdesc->frame_type = DUMP_FRAME_TXDONE;
 545
 546         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 547
 548         if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
 549                 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
 550                                             entry->skb, &tx_status);
 551         else
 552                 dev_kfree_skb(entry->skb);
 553         entry->skb = NULL;
 554 }
 555 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 556
 557 void rt2x00lib_rxdone(struct queue_entry *entry,
 558                       struct rxdone_entry_desc *rxdesc)
 559 {
 560         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 561         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 562         struct ieee80211_supported_band *sband;
 563         struct ieee80211_hdr *hdr;
 564         const struct rt2x00_rate *rate;
 565         unsigned int i;
 566         int idx = -1;
 567         u16 fc;
 568
 569         /*
 570          * Update RX statistics.
 571          */
 572         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 573         for (i = 0; i < sband->n_bitrates; i++) {
 574                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 575
 576                 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 577                      (rate->plcp == rxdesc->signal)) ||
 578                     (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 579                       (rate->bitrate == rxdesc->signal))) {
 580                         idx = i;
 581                         break;
 582                 }
 583         }
 584
 585         if (idx < 0) {
 586                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 587                         "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
 588                         !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
 589                 idx = 0;
 590         }
 591
 592         /*
 593          * Only update link status if this is a beacon frame carrying our bssid.
 594          */
 595         hdr = (struct ieee80211_hdr *)entry->skb->data;
 596         fc = le16_to_cpu(hdr->frame_control);
 597         if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
 598                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
 599
 600         rt2x00dev->link.qual.rx_success++;
 601
 602         rx_status->rate_idx = idx;
 603         rx_status->signal =
 604             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
 605         rx_status->ssi = rxdesc->rssi;
 606         rx_status->flag = rxdesc->flags;
 607         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 608
 609         /*
 610          * Send frame to mac80211 & debugfs.
 611          * mac80211 will clean up the skb structure.
 612          */
 613         get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
 614         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 615         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 616         entry->skb = NULL;
 617 }
 618 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 619
 620 /*
 621  * TX descriptor initializer
 622  */
 623 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 624                              struct sk_buff *skb,
 625                              struct ieee80211_tx_control *control)
 626 {
 627         struct txentry_desc txdesc;
 628         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 629         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
 630         const struct rt2x00_rate *rate;
 631         int tx_rate;
 632         int length;
 633         int duration;
 634         int residual;
 635         u16 frame_control;
 636         u16 seq_ctrl;
 637
 638         memset(&txdesc, 0, sizeof(txdesc));
 639
 640         txdesc.queue = skbdesc->entry->queue->qid;
 641         txdesc.cw_min = skbdesc->entry->queue->cw_min;
 642         txdesc.cw_max = skbdesc->entry->queue->cw_max;
 643         txdesc.aifs = skbdesc->entry->queue->aifs;
 644
 645         /*
 646          * Read required fields from ieee80211 header.
 647          */
 648         frame_control = le16_to_cpu(hdr->frame_control);
 649         seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
 650
 651         tx_rate = control->tx_rate->hw_value;
 652
 653         /*
 654          * Check whether this frame is to be acked
 655          */
 656         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 657                 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 658
 659         /*
 660          * Check if this is a RTS/CTS frame
 661          */
 662         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 663                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 664                 if (is_rts_frame(frame_control)) {
 665                         __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
 666                         __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 667                 } else
 668                         __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
 669                 if (control->rts_cts_rate)
 670                         tx_rate = control->rts_cts_rate->hw_value;
 671         }
 672
 673         rate = rt2x00_get_rate(tx_rate);
 674
 675         /*
 676          * Check if more fragments are pending
 677          */
 678         if (ieee80211_get_morefrag(hdr)) {
 679                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 680                 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
 681         }
 682
 683         /*
 684          * Beacons and probe responses require the tsf timestamp
 685          * to be inserted into the frame.
 686          */
 687         if (txdesc.queue == QID_BEACON || is_probe_resp(frame_control))
 688                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
 689
 690         /*
 691          * Determine with what IFS priority this frame should be send.
 692          * Set ifs to IFS_SIFS when the this is not the first fragment,
 693          * or this fragment came after RTS/CTS.
 694          */
 695         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 696             test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
 697                 txdesc.ifs = IFS_SIFS;
 698         else
 699                 txdesc.ifs = IFS_BACKOFF;
 700
 701         /*
 702          * PLCP setup
 703          * Length calculation depends on OFDM/CCK rate.
 704          */
 705         txdesc.signal = rate->plcp;
 706         txdesc.service = 0x04;
 707
 708         length = skbdesc->data_len + FCS_LEN;
 709         if (rate->flags & DEV_RATE_OFDM) {
 710                 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
 711
 712                 txdesc.length_high = (length >> 6) & 0x3f;
 713                 txdesc.length_low = length & 0x3f;
 714         } else {
 715                 /*
 716                  * Convert length to microseconds.
 717                  */
 718                 residual = get_duration_res(length, rate->bitrate);
 719                 duration = get_duration(length, rate->bitrate);
 720
 721                 if (residual != 0) {
 722                         duration++;
 723
 724                         /*
 725                          * Check if we need to set the Length Extension
 726                          */
 727                         if (rate->bitrate == 110 && residual <= 30)
 728                                 txdesc.service |= 0x80;
 729                 }
 730
 731                 txdesc.length_high = (duration >> 8) & 0xff;
 732                 txdesc.length_low = duration & 0xff;
 733
 734                 /*
 735                  * When preamble is enabled we should set the
 736                  * preamble bit for the signal.
 737                  */
 738                 if (rt2x00_get_rate_preamble(tx_rate))
 739                         txdesc.signal |= 0x08;
 740         }
 741
 742         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
 743
 744         /*
 745          * Update queue entry.
 746          */
 747         skbdesc->entry->skb = skb;
 748
 749         /*
 750          * The frame has been completely initialized and ready
 751          * for sending to the device. The caller will push the
 752          * frame to the device, but we are going to push the
 753          * frame to debugfs here.
 754          */
 755         skbdesc->frame_type = DUMP_FRAME_TX;
 756         rt2x00debug_dump_frame(rt2x00dev, skb);
 757 }
 758 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 759
 760 /*
 761  * Driver initialization handlers.
 762  */
 763 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 764         {
 765                 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
 766                 .bitrate = 10,
 767                 .ratemask = BIT(0),
 768                 .plcp = 0x00,
 769         },
 770         {
 771                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 772                 .bitrate = 20,
 773                 .ratemask = BIT(1),
 774                 .plcp = 0x01,
 775         },
 776         {
 777                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 778                 .bitrate = 55,
 779                 .ratemask = BIT(2),
 780                 .plcp = 0x02,
 781         },
 782         {
 783                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 784                 .bitrate = 110,
 785                 .ratemask = BIT(3),
 786                 .plcp = 0x03,
 787         },
 788         {
 789                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 790                 .bitrate = 60,
 791                 .ratemask = BIT(4),
 792                 .plcp = 0x0b,
 793         },
 794         {
 795                 .flags = DEV_RATE_OFDM,
 796                 .bitrate = 90,
 797                 .ratemask = BIT(5),
 798                 .plcp = 0x0f,
 799         },
 800         {
 801                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 802                 .bitrate = 120,
 803                 .ratemask = BIT(6),
 804                 .plcp = 0x0a,
 805         },
 806         {
 807                 .flags = DEV_RATE_OFDM,
 808                 .bitrate = 180,
 809                 .ratemask = BIT(7),
 810                 .plcp = 0x0e,
 811         },
 812         {
 813                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 814                 .bitrate = 240,
 815                 .ratemask = BIT(8),
 816                 .plcp = 0x09,
 817         },
 818         {
 819                 .flags = DEV_RATE_OFDM,
 820                 .bitrate = 360,
 821                 .ratemask = BIT(9),
 822                 .plcp = 0x0d,
 823         },
 824         {
 825                 .flags = DEV_RATE_OFDM,
 826                 .bitrate = 480,
 827                 .ratemask = BIT(10),
 828                 .plcp = 0x08,
 829         },
 830         {
 831                 .flags = DEV_RATE_OFDM,
 832                 .bitrate = 540,
 833                 .ratemask = BIT(11),
 834                 .plcp = 0x0c,
 835         },
 836 };
 837
 838 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 839                               const int channel, const int tx_power,
 840                               const int value)
 841 {
 842         entry->center_freq = ieee80211_channel_to_frequency(channel);
 843         entry->hw_value = value;
 844         entry->max_power = tx_power;
 845         entry->max_antenna_gain = 0xff;
 846 }
 847
 848 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 849                            const u16 index, const struct rt2x00_rate *rate)
 850 {
 851         entry->flags = 0;
 852         entry->bitrate = rate->bitrate;
 853         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 854         entry->hw_value_short = entry->hw_value;
 855
 856         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 857                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 858                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 859         }
 860 }
 861
 862 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 863                                     struct hw_mode_spec *spec)
 864 {
 865         struct ieee80211_hw *hw = rt2x00dev->hw;
 866         struct ieee80211_channel *channels;
 867         struct ieee80211_rate *rates;
 868         unsigned int num_rates;
 869         unsigned int i;
 870         unsigned char tx_power;
 871
 872         num_rates = 0;
 873         if (spec->supported_rates & SUPPORT_RATE_CCK)
 874                 num_rates += 4;
 875         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 876                 num_rates += 8;
 877
 878         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 879         if (!channels)
 880                 return -ENOMEM;
 881
 882         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 883         if (!rates)
 884                 goto exit_free_channels;
 885
 886         /*
 887          * Initialize Rate list.
 888          */
 889         for (i = 0; i < num_rates; i++)
 890                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 891
 892         /*
 893          * Initialize Channel list.
 894          */
 895         for (i = 0; i < spec->num_channels; i++) {
 896                 if (spec->channels[i].channel <= 14) {
 897                         if (spec->tx_power_bg)
 898                                 tx_power = spec->tx_power_bg[i];
 899                         else
 900                                 tx_power = spec->tx_power_default;
 901                 } else {
 902                         if (spec->tx_power_a)
 903                                 tx_power = spec->tx_power_a[i];
 904                         else
 905                                 tx_power = spec->tx_power_default;
 906                 }
 907
 908                 rt2x00lib_channel(&channels[i],
 909                                   spec->channels[i].channel, tx_power, i);
 910         }
 911
 912         /*
 913          * Intitialize 802.11b, 802.11g
 914          * Rates: CCK, OFDM.
 915          * Channels: 2.4 GHz
 916          */
 917         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 918                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 919                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 920                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 921                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 922                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 923                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 924         }
 925
 926         /*
 927          * Intitialize 802.11a
 928          * Rates: OFDM.
 929          * Channels: OFDM, UNII, HiperLAN2.
 930          */
 931         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 932                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 933                     spec->num_channels - 14;
 934                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 935                     num_rates - 4;
 936                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 937                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 938                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 939                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 940         }
 941
 942         return 0;
 943
 944  exit_free_channels:
 945         kfree(channels);
 946         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 947         return -ENOMEM;
 948 }
 949
 950 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 951 {
 952         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 953                 ieee80211_unregister_hw(rt2x00dev->hw);
 954
 955         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 956                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 957                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 958                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 959                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 960         }
 961 }
 962
 963 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 964 {
 965         struct hw_mode_spec *spec = &rt2x00dev->spec;
 966         int status;
 967
 968         /*
 969          * Initialize HW modes.
 970          */
 971         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 972         if (status)
 973                 return status;
 974
 975         /*
 976          * Register HW.
 977          */
 978         status = ieee80211_register_hw(rt2x00dev->hw);
 979         if (status) {
 980                 rt2x00lib_remove_hw(rt2x00dev);
 981                 return status;
 982         }
 983
 984         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 985
 986         return 0;
 987 }
 988
 989 /*
 990  * Initialization/uninitialization handlers.
 991  */
 992 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 993 {
 994         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 995                 return;
 996
 997         /*
 998          * Unregister extra components.
 999          */
1000         rt2x00rfkill_unregister(rt2x00dev);
1001
1002         /*
1003          * Allow the HW to uninitialize.
1004          */
1005         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1006
1007         /*
1008          * Free allocated queue entries.
1009          */
1010         rt2x00queue_uninitialize(rt2x00dev);
1011 }
1012
1013 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1014 {
1015         int status;
1016
1017         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1018                 return 0;
1019
1020         /*
1021          * Allocate all queue entries.
1022          */
1023         status = rt2x00queue_initialize(rt2x00dev);
1024         if (status)
1025                 return status;
1026
1027         /*
1028          * Initialize the device.
1029          */
1030         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1031         if (status) {
1032                 rt2x00queue_uninitialize(rt2x00dev);
1033                 return status;
1034         }
1035
1036         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1037
1038         /*
1039          * Register the extra components.
1040          */
1041         rt2x00rfkill_register(rt2x00dev);
1042
1043         return 0;
1044 }
1045
1046 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1047 {
1048         int retval;
1049
1050         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1051                 return 0;
1052
1053         /*
1054          * If this is the first interface which is added,
1055          * we should load the firmware now.
1056          */
1057         retval = rt2x00lib_load_firmware(rt2x00dev);
1058         if (retval)
1059                 return retval;
1060
1061         /*
1062          * Initialize the device.
1063          */
1064         retval = rt2x00lib_initialize(rt2x00dev);
1065         if (retval)
1066                 return retval;
1067
1068         /*
1069          * Enable radio.
1070          */
1071         retval = rt2x00lib_enable_radio(rt2x00dev);
1072         if (retval) {
1073                 rt2x00lib_uninitialize(rt2x00dev);
1074                 return retval;
1075         }
1076
1077         rt2x00dev->intf_ap_count = 0;
1078         rt2x00dev->intf_sta_count = 0;
1079         rt2x00dev->intf_associated = 0;
1080
1081         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1082
1083         return 0;
1084 }
1085
1086 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1087 {
1088         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1089                 return;
1090
1091         /*
1092          * Perhaps we can add something smarter here,
1093          * but for now just disabling the radio should do.
1094          */
1095         rt2x00lib_disable_radio(rt2x00dev);
1096
1097         rt2x00dev->intf_ap_count = 0;
1098         rt2x00dev->intf_sta_count = 0;
1099         rt2x00dev->intf_associated = 0;
1100
1101         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1102 }
1103
1104 /*
1105  * driver allocation handlers.
1106  */
1107 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1108 {
1109         int retval = -ENOMEM;
1110
1111         /*
1112          * Make room for rt2x00_intf inside the per-interface
1113          * structure ieee80211_vif.
1114          */
1115         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1116
1117         /*
1118          * Let the driver probe the device to detect the capabilities.
1119          */
1120         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1121         if (retval) {
1122                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1123                 goto exit;
1124         }
1125
1126         /*
1127          * Initialize configuration work.
1128          */
1129         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1130         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1131         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1132
1133         /*
1134          * Allocate queue array.
1135          */
1136         retval = rt2x00queue_allocate(rt2x00dev);
1137         if (retval)
1138                 goto exit;
1139
1140         /*
1141          * Initialize ieee80211 structure.
1142          */
1143         retval = rt2x00lib_probe_hw(rt2x00dev);
1144         if (retval) {
1145                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1146                 goto exit;
1147         }
1148
1149         /*
1150          * Register extra components.
1151          */
1152         rt2x00leds_register(rt2x00dev);
1153         rt2x00rfkill_allocate(rt2x00dev);
1154         rt2x00debug_register(rt2x00dev);
1155
1156         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1157
1158         return 0;
1159
1160 exit:
1161         rt2x00lib_remove_dev(rt2x00dev);
1162
1163         return retval;
1164 }
1165 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1166
1167 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1168 {
1169         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1170
1171         /*
1172          * Disable radio.
1173          */
1174         rt2x00lib_disable_radio(rt2x00dev);
1175
1176         /*
1177          * Uninitialize device.
1178          */
1179         rt2x00lib_uninitialize(rt2x00dev);
1180
1181         /*
1182          * Free extra components
1183          */
1184         rt2x00debug_deregister(rt2x00dev);
1185         rt2x00rfkill_free(rt2x00dev);
1186         rt2x00leds_unregister(rt2x00dev);
1187
1188         /*
1189          * Free ieee80211_hw memory.
1190          */
1191         rt2x00lib_remove_hw(rt2x00dev);
1192
1193         /*
1194          * Free firmware image.
1195          */
1196         rt2x00lib_free_firmware(rt2x00dev);
1197
1198         /*
1199          * Free queue structures.
1200          */
1201         rt2x00queue_free(rt2x00dev);
1202 }
1203 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1204
1205 /*
1206  * Device state handlers
1207  */
1208 #ifdef CONFIG_PM
1209 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1210 {
1211         int retval;
1212
1213         NOTICE(rt2x00dev, "Going to sleep.\n");
1214         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1215
1216         /*
1217          * Only continue if mac80211 has open interfaces.
1218          */
1219         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1220                 goto exit;
1221         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1222
1223         /*
1224          * Disable radio.
1225          */
1226         rt2x00lib_stop(rt2x00dev);
1227         rt2x00lib_uninitialize(rt2x00dev);
1228
1229         /*
1230          * Suspend/disable extra components.
1231          */
1232         rt2x00leds_suspend(rt2x00dev);
1233         rt2x00rfkill_suspend(rt2x00dev);
1234         rt2x00debug_deregister(rt2x00dev);
1235
1236 exit:
1237         /*
1238          * Set device mode to sleep for power management,
1239          * on some hardware this call seems to consistently fail.
1240          * From the specifications it is hard to tell why it fails,
1241          * and if this is a "bad thing".
1242          * Overall it is safe to just ignore the failure and
1243          * continue suspending. The only downside is that the
1244          * device will not be in optimal power save mode, but with
1245          * the radio and the other components already disabled the
1246          * device is as good as disabled.
1247          */
1248         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1249         if (retval)
1250                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1251                         "continue suspending.\n");
1252
1253         return 0;
1254 }
1255 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1256
1257 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1258                                   struct ieee80211_vif *vif)
1259 {
1260         struct rt2x00_dev *rt2x00dev = data;
1261         struct rt2x00_intf *intf = vif_to_intf(vif);
1262
1263         spin_lock(&intf->lock);
1264
1265         rt2x00lib_config_intf(rt2x00dev, intf,
1266                               vif->type, intf->mac, intf->bssid);
1267
1268
1269         /*
1270          * Master or Ad-hoc mode require a new beacon update.
1271          */
1272         if (vif->type == IEEE80211_IF_TYPE_AP ||
1273             vif->type == IEEE80211_IF_TYPE_IBSS)
1274                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1275
1276         spin_unlock(&intf->lock);
1277 }
1278
1279 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1280 {
1281         int retval;
1282
1283         NOTICE(rt2x00dev, "Waking up.\n");
1284
1285         /*
1286          * Restore/enable extra components.
1287          */
1288         rt2x00debug_register(rt2x00dev);
1289         rt2x00rfkill_resume(rt2x00dev);
1290         rt2x00leds_resume(rt2x00dev);
1291
1292         /*
1293          * Only continue if mac80211 had open interfaces.
1294          */
1295         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1296                 return 0;
1297
1298         /*
1299          * Reinitialize device and all active interfaces.
1300          */
1301         retval = rt2x00lib_start(rt2x00dev);
1302         if (retval)
1303                 goto exit;
1304
1305         /*
1306          * Reconfigure device.
1307          */
1308         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1309         if (!rt2x00dev->hw->conf.radio_enabled)
1310                 rt2x00lib_disable_radio(rt2x00dev);
1311
1312         /*
1313          * Iterator over each active interface to
1314          * reconfigure the hardware.
1315          */
1316         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1317                                             rt2x00lib_resume_intf, rt2x00dev);
1318
1319         /*
1320          * We are ready again to receive requests from mac80211.
1321          */
1322         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1323
1324         /*
1325          * It is possible that during that mac80211 has attempted
1326          * to send frames while we were suspending or resuming.
1327          * In that case we have disabled the TX queue and should
1328          * now enable it again
1329          */
1330         ieee80211_start_queues(rt2x00dev->hw);
1331
1332         /*
1333          * During interface iteration we might have changed the
1334          * delayed_flags, time to handles the event by calling
1335          * the work handler directly.
1336          */
1337         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1338
1339         return 0;
1340
1341 exit:
1342         rt2x00lib_disable_radio(rt2x00dev);
1343         rt2x00lib_uninitialize(rt2x00dev);
1344         rt2x00debug_deregister(rt2x00dev);
1345
1346         return retval;
1347 }
1348 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1349 #endif /* CONFIG_PM */
1350
1351 /*
1352  * rt2x00lib module information.
1353  */
1354 MODULE_AUTHOR(DRV_PROJECT);
1355 MODULE_VERSION(DRV_VERSION);
1356 MODULE_DESCRIPTION("rt2x00 library");
1357 MODULE_LICENSE("GPL");