err.no Git - linux-2.6/blob - 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_PREAMBLE)
 451                 rt2x00lib_config_preamble(rt2x00dev, intf,
 452                                           intf->conf.use_short_preamble);
 453 }
 454
 455 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 456 {
 457         struct rt2x00_dev *rt2x00dev =
 458             container_of(work, struct rt2x00_dev, intf_work);
 459
 460         /*
 461          * Iterate over each interface and perform the
 462          * requested configurations.
 463          */
 464         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 465                                             rt2x00lib_intf_scheduled_iter,
 466                                             rt2x00dev);
 467 }
 468
 469 /*
 470  * Interrupt context handlers.
 471  */
 472 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 473                                       struct ieee80211_vif *vif)
 474 {
 475         struct rt2x00_intf *intf = vif_to_intf(vif);
 476
 477         if (vif->type != IEEE80211_IF_TYPE_AP &&
 478             vif->type != IEEE80211_IF_TYPE_IBSS)
 479                 return;
 480
 481         spin_lock(&intf->lock);
 482         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 483         spin_unlock(&intf->lock);
 484 }
 485
 486 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 487 {
 488         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 489                 return;
 490
 491         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 492                                             rt2x00lib_beacondone_iter,
 493                                             rt2x00dev);
 494
 495         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 496 }
 497 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 498
 499 void rt2x00lib_txdone(struct queue_entry *entry,
 500                       struct txdone_entry_desc *txdesc)
 501 {
 502         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 503         struct skb_frame_desc *skbdesc;
 504         struct ieee80211_tx_status tx_status;
 505         int success = !!(txdesc->status == TX_SUCCESS ||
 506                          txdesc->status == TX_SUCCESS_RETRY);
 507         int fail = !!(txdesc->status == TX_FAIL_RETRY ||
 508                       txdesc->status == TX_FAIL_INVALID ||
 509                       txdesc->status == TX_FAIL_OTHER);
 510
 511         /*
 512          * Update TX statistics.
 513          */
 514         rt2x00dev->link.qual.tx_success += success;
 515         rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
 516
 517         /*
 518          * Initialize TX status
 519          */
 520         tx_status.flags = 0;
 521         tx_status.ack_signal = 0;
 522         tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
 523         tx_status.retry_count = txdesc->retry;
 524         memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
 525
 526         if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 527                 if (success)
 528                         tx_status.flags |= IEEE80211_TX_STATUS_ACK;
 529                 else
 530                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 531         }
 532
 533         tx_status.queue_length = entry->queue->limit;
 534         tx_status.queue_number = tx_status.control.queue;
 535
 536         if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 537                 if (success)
 538                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 539                 else
 540                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 541         }
 542
 543         /*
 544          * Send the tx_status to debugfs. Only send the status report
 545          * to mac80211 when the frame originated from there. If this was
 546          * a extra frame coming through a mac80211 library call (RTS/CTS)
 547          * then we should not send the status report back.
 548          * If send to mac80211, mac80211 will clean up the skb structure,
 549          * otherwise we have to do it ourself.
 550          */
 551         skbdesc = get_skb_frame_desc(entry->skb);
 552         skbdesc->frame_type = DUMP_FRAME_TXDONE;
 553
 554         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 555
 556         if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
 557                 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
 558                                             entry->skb, &tx_status);
 559         else
 560                 dev_kfree_skb(entry->skb);
 561         entry->skb = NULL;
 562 }
 563 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 564
 565 void rt2x00lib_rxdone(struct queue_entry *entry,
 566                       struct rxdone_entry_desc *rxdesc)
 567 {
 568         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 569         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 570         struct ieee80211_supported_band *sband;
 571         struct ieee80211_hdr *hdr;
 572         const struct rt2x00_rate *rate;
 573         unsigned int i;
 574         int idx = -1;
 575         u16 fc;
 576
 577         /*
 578          * Update RX statistics.
 579          */
 580         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 581         for (i = 0; i < sband->n_bitrates; i++) {
 582                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 583
 584                 /*
 585                  * When frame was received with an OFDM bitrate,
 586                  * the signal is the PLCP value. If it was received with
 587                  * a CCK bitrate the signal is the rate in 100kbit/s.
 588                  */
 589                 if ((rxdesc->ofdm && rate->plcp == rxdesc->signal) ||
 590                     (!rxdesc->ofdm && rate->bitrate == rxdesc->signal)) {
 591                         idx = i;
 592                         break;
 593                 }
 594         }
 595
 596         /*
 597          * Only update link status if this is a beacon frame carrying our bssid.
 598          */
 599         hdr = (struct ieee80211_hdr *)entry->skb->data;
 600         fc = le16_to_cpu(hdr->frame_control);
 601         if (is_beacon(fc) && rxdesc->my_bss)
 602                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
 603
 604         rt2x00dev->link.qual.rx_success++;
 605
 606         rx_status->rate_idx = idx;
 607         rx_status->signal =
 608             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
 609         rx_status->ssi = rxdesc->rssi;
 610         rx_status->flag = rxdesc->flags;
 611         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 612
 613         /*
 614          * Send frame to mac80211 & debugfs.
 615          * mac80211 will clean up the skb structure.
 616          */
 617         get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
 618         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 619         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 620         entry->skb = NULL;
 621 }
 622 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 623
 624 /*
 625  * TX descriptor initializer
 626  */
 627 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 628                              struct sk_buff *skb,
 629                              struct ieee80211_tx_control *control)
 630 {
 631         struct txentry_desc txdesc;
 632         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 633         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
 634         const struct rt2x00_rate *rate;
 635         int tx_rate;
 636         int length;
 637         int duration;
 638         int residual;
 639         u16 frame_control;
 640         u16 seq_ctrl;
 641
 642         memset(&txdesc, 0, sizeof(txdesc));
 643
 644         txdesc.queue = skbdesc->entry->queue->qid;
 645         txdesc.cw_min = skbdesc->entry->queue->cw_min;
 646         txdesc.cw_max = skbdesc->entry->queue->cw_max;
 647         txdesc.aifs = skbdesc->entry->queue->aifs;
 648
 649         /*
 650          * Read required fields from ieee80211 header.
 651          */
 652         frame_control = le16_to_cpu(hdr->frame_control);
 653         seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
 654
 655         tx_rate = control->tx_rate->hw_value;
 656
 657         /*
 658          * Check whether this frame is to be acked
 659          */
 660         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 661                 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 662
 663         /*
 664          * Check if this is a RTS/CTS frame
 665          */
 666         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 667                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 668                 if (is_rts_frame(frame_control)) {
 669                         __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
 670                         __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 671                 } else
 672                         __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
 673                 if (control->rts_cts_rate)
 674                         tx_rate = control->rts_cts_rate->hw_value;
 675         }
 676
 677         rate = rt2x00_get_rate(tx_rate);
 678
 679         /*
 680          * Check if more fragments are pending
 681          */
 682         if (ieee80211_get_morefrag(hdr)) {
 683                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 684                 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
 685         }
 686
 687         /*
 688          * Beacons and probe responses require the tsf timestamp
 689          * to be inserted into the frame.
 690          */
 691         if (control->queue == RT2X00_BCN_QUEUE_BEACON ||
 692             is_probe_resp(frame_control))
 693                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
 694
 695         /*
 696          * Determine with what IFS priority this frame should be send.
 697          * Set ifs to IFS_SIFS when the this is not the first fragment,
 698          * or this fragment came after RTS/CTS.
 699          */
 700         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 701             test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
 702                 txdesc.ifs = IFS_SIFS;
 703         else
 704                 txdesc.ifs = IFS_BACKOFF;
 705
 706         /*
 707          * PLCP setup
 708          * Length calculation depends on OFDM/CCK rate.
 709          */
 710         txdesc.signal = rate->plcp;
 711         txdesc.service = 0x04;
 712
 713         length = skbdesc->data_len + FCS_LEN;
 714         if (rate->flags & DEV_RATE_OFDM) {
 715                 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
 716
 717                 txdesc.length_high = (length >> 6) & 0x3f;
 718                 txdesc.length_low = length & 0x3f;
 719         } else {
 720                 /*
 721                  * Convert length to microseconds.
 722                  */
 723                 residual = get_duration_res(length, rate->bitrate);
 724                 duration = get_duration(length, rate->bitrate);
 725
 726                 if (residual != 0) {
 727                         duration++;
 728
 729                         /*
 730                          * Check if we need to set the Length Extension
 731                          */
 732                         if (rate->bitrate == 110 && residual <= 30)
 733                                 txdesc.service |= 0x80;
 734                 }
 735
 736                 txdesc.length_high = (duration >> 8) & 0xff;
 737                 txdesc.length_low = duration & 0xff;
 738
 739                 /*
 740                  * When preamble is enabled we should set the
 741                  * preamble bit for the signal.
 742                  */
 743                 if (rt2x00_get_rate_preamble(tx_rate))
 744                         txdesc.signal |= 0x08;
 745         }
 746
 747         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
 748
 749         /*
 750          * Update queue entry.
 751          */
 752         skbdesc->entry->skb = skb;
 753
 754         /*
 755          * The frame has been completely initialized and ready
 756          * for sending to the device. The caller will push the
 757          * frame to the device, but we are going to push the
 758          * frame to debugfs here.
 759          */
 760         skbdesc->frame_type = DUMP_FRAME_TX;
 761         rt2x00debug_dump_frame(rt2x00dev, skb);
 762 }
 763 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 764
 765 /*
 766  * Driver initialization handlers.
 767  */
 768 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 769         {
 770                 .flags = DEV_RATE_CCK,
 771                 .bitrate = 10,
 772                 .ratemask = DEV_RATEMASK_1MB,
 773                 .plcp = 0x00,
 774         },
 775         {
 776                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 777                 .bitrate = 20,
 778                 .ratemask = DEV_RATEMASK_2MB,
 779                 .plcp = 0x01,
 780         },
 781         {
 782                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 783                 .bitrate = 55,
 784                 .ratemask = DEV_RATEMASK_5_5MB,
 785                 .plcp = 0x02,
 786         },
 787         {
 788                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 789                 .bitrate = 110,
 790                 .ratemask = DEV_RATEMASK_11MB,
 791                 .plcp = 0x03,
 792         },
 793         {
 794                 .flags = DEV_RATE_OFDM,
 795                 .bitrate = 60,
 796                 .ratemask = DEV_RATEMASK_6MB,
 797                 .plcp = 0x0b,
 798         },
 799         {
 800                 .flags = DEV_RATE_OFDM,
 801                 .bitrate = 90,
 802                 .ratemask = DEV_RATEMASK_9MB,
 803                 .plcp = 0x0f,
 804         },
 805         {
 806                 .flags = DEV_RATE_OFDM,
 807                 .bitrate = 120,
 808                 .ratemask = DEV_RATEMASK_12MB,
 809                 .plcp = 0x0a,
 810         },
 811         {
 812                 .flags = DEV_RATE_OFDM,
 813                 .bitrate = 180,
 814                 .ratemask = DEV_RATEMASK_18MB,
 815                 .plcp = 0x0e,
 816         },
 817         {
 818                 .flags = DEV_RATE_OFDM,
 819                 .bitrate = 240,
 820                 .ratemask = DEV_RATEMASK_24MB,
 821                 .plcp = 0x09,
 822         },
 823         {
 824                 .flags = DEV_RATE_OFDM,
 825                 .bitrate = 360,
 826                 .ratemask = DEV_RATEMASK_36MB,
 827                 .plcp = 0x0d,
 828         },
 829         {
 830                 .flags = DEV_RATE_OFDM,
 831                 .bitrate = 480,
 832                 .ratemask = DEV_RATEMASK_48MB,
 833                 .plcp = 0x08,
 834         },
 835         {
 836                 .flags = DEV_RATE_OFDM,
 837                 .bitrate = 540,
 838                 .ratemask = DEV_RATEMASK_54MB,
 839                 .plcp = 0x0c,
 840         },
 841 };
 842
 843 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 844                               const int channel, const int tx_power,
 845                               const int value)
 846 {
 847         entry->center_freq = ieee80211_channel_to_frequency(channel);
 848         entry->hw_value = value;
 849         entry->max_power = tx_power;
 850         entry->max_antenna_gain = 0xff;
 851 }
 852
 853 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 854                            const u16 index, const struct rt2x00_rate *rate)
 855 {
 856         entry->flags = 0;
 857         entry->bitrate = rate->bitrate;
 858         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 859         entry->hw_value_short = entry->hw_value;
 860
 861         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 862                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 863                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 864         }
 865 }
 866
 867 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 868                                     struct hw_mode_spec *spec)
 869 {
 870         struct ieee80211_hw *hw = rt2x00dev->hw;
 871         struct ieee80211_channel *channels;
 872         struct ieee80211_rate *rates;
 873         unsigned int num_rates;
 874         unsigned int i;
 875         unsigned char tx_power;
 876
 877         num_rates = 0;
 878         if (spec->supported_rates & SUPPORT_RATE_CCK)
 879                 num_rates += 4;
 880         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 881                 num_rates += 8;
 882
 883         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 884         if (!channels)
 885                 return -ENOMEM;
 886
 887         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 888         if (!rates)
 889                 goto exit_free_channels;
 890
 891         /*
 892          * Initialize Rate list.
 893          */
 894         for (i = 0; i < num_rates; i++)
 895                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 896
 897         /*
 898          * Initialize Channel list.
 899          */
 900         for (i = 0; i < spec->num_channels; i++) {
 901                 if (spec->channels[i].channel <= 14) {
 902                         if (spec->tx_power_bg)
 903                                 tx_power = spec->tx_power_bg[i];
 904                         else
 905                                 tx_power = spec->tx_power_default;
 906                 } else {
 907                         if (spec->tx_power_a)
 908                                 tx_power = spec->tx_power_a[i];
 909                         else
 910                                 tx_power = spec->tx_power_default;
 911                 }
 912
 913                 rt2x00lib_channel(&channels[i],
 914                                   spec->channels[i].channel, tx_power, i);
 915         }
 916
 917         /*
 918          * Intitialize 802.11b, 802.11g
 919          * Rates: CCK, OFDM.
 920          * Channels: 2.4 GHz
 921          */
 922         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 923                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 924                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 925                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 926                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 927                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 928                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 929         }
 930
 931         /*
 932          * Intitialize 802.11a
 933          * Rates: OFDM.
 934          * Channels: OFDM, UNII, HiperLAN2.
 935          */
 936         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 937                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 938                     spec->num_channels - 14;
 939                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 940                     num_rates - 4;
 941                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 942                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 943                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 944                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 945         }
 946
 947         return 0;
 948
 949  exit_free_channels:
 950         kfree(channels);
 951         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 952         return -ENOMEM;
 953 }
 954
 955 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 956 {
 957         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 958                 ieee80211_unregister_hw(rt2x00dev->hw);
 959
 960         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 961                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 962                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 963                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 964                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 965         }
 966 }
 967
 968 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 969 {
 970         struct hw_mode_spec *spec = &rt2x00dev->spec;
 971         int status;
 972
 973         /*
 974          * Initialize HW modes.
 975          */
 976         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 977         if (status)
 978                 return status;
 979
 980         /*
 981          * Register HW.
 982          */
 983         status = ieee80211_register_hw(rt2x00dev->hw);
 984         if (status) {
 985                 rt2x00lib_remove_hw(rt2x00dev);
 986                 return status;
 987         }
 988
 989         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 990
 991         return 0;
 992 }
 993
 994 /*
 995  * Initialization/uninitialization handlers.
 996  */
 997 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 998 {
 999         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1000                 return;
1001
1002         /*
1003          * Unregister rfkill.
1004          */
1005         rt2x00rfkill_unregister(rt2x00dev);
1006
1007         /*
1008          * Allow the HW to uninitialize.
1009          */
1010         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1011
1012         /*
1013          * Free allocated queue entries.
1014          */
1015         rt2x00queue_uninitialize(rt2x00dev);
1016 }
1017
1018 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1019 {
1020         int status;
1021
1022         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1023                 return 0;
1024
1025         /*
1026          * Allocate all queue entries.
1027          */
1028         status = rt2x00queue_initialize(rt2x00dev);
1029         if (status)
1030                 return status;
1031
1032         /*
1033          * Initialize the device.
1034          */
1035         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1036         if (status)
1037                 goto exit;
1038
1039         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1040
1041         /*
1042          * Register the rfkill handler.
1043          */
1044         status = rt2x00rfkill_register(rt2x00dev);
1045         if (status)
1046                 goto exit;
1047
1048         return 0;
1049
1050 exit:
1051         rt2x00lib_uninitialize(rt2x00dev);
1052
1053         return status;
1054 }
1055
1056 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1057 {
1058         int retval;
1059
1060         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1061                 return 0;
1062
1063         /*
1064          * If this is the first interface which is added,
1065          * we should load the firmware now.
1066          */
1067         retval = rt2x00lib_load_firmware(rt2x00dev);
1068         if (retval)
1069                 return retval;
1070
1071         /*
1072          * Initialize the device.
1073          */
1074         retval = rt2x00lib_initialize(rt2x00dev);
1075         if (retval)
1076                 return retval;
1077
1078         /*
1079          * Enable radio.
1080          */
1081         retval = rt2x00lib_enable_radio(rt2x00dev);
1082         if (retval) {
1083                 rt2x00lib_uninitialize(rt2x00dev);
1084                 return retval;
1085         }
1086
1087         rt2x00dev->intf_ap_count = 0;
1088         rt2x00dev->intf_sta_count = 0;
1089         rt2x00dev->intf_associated = 0;
1090
1091         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1092
1093         return 0;
1094 }
1095
1096 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1097 {
1098         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1099                 return;
1100
1101         /*
1102          * Perhaps we can add something smarter here,
1103          * but for now just disabling the radio should do.
1104          */
1105         rt2x00lib_disable_radio(rt2x00dev);
1106
1107         rt2x00dev->intf_ap_count = 0;
1108         rt2x00dev->intf_sta_count = 0;
1109         rt2x00dev->intf_associated = 0;
1110
1111         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1112 }
1113
1114 /*
1115  * driver allocation handlers.
1116  */
1117 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1118 {
1119         int retval = -ENOMEM;
1120
1121         /*
1122          * Make room for rt2x00_intf inside the per-interface
1123          * structure ieee80211_vif.
1124          */
1125         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1126
1127         /*
1128          * Let the driver probe the device to detect the capabilities.
1129          */
1130         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1131         if (retval) {
1132                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1133                 goto exit;
1134         }
1135
1136         /*
1137          * Initialize configuration work.
1138          */
1139         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1140         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1141         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1142
1143         /*
1144          * Allocate queue array.
1145          */
1146         retval = rt2x00queue_allocate(rt2x00dev);
1147         if (retval)
1148                 goto exit;
1149
1150         /*
1151          * Initialize ieee80211 structure.
1152          */
1153         retval = rt2x00lib_probe_hw(rt2x00dev);
1154         if (retval) {
1155                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1156                 goto exit;
1157         }
1158
1159         /*
1160          * Register LED.
1161          */
1162         rt2x00leds_register(rt2x00dev);
1163
1164         /*
1165          * Allocatie rfkill.
1166          */
1167         retval = rt2x00rfkill_allocate(rt2x00dev);
1168         if (retval)
1169                 goto exit;
1170
1171         /*
1172          * Open the debugfs entry.
1173          */
1174         rt2x00debug_register(rt2x00dev);
1175
1176         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1177
1178         return 0;
1179
1180 exit:
1181         rt2x00lib_remove_dev(rt2x00dev);
1182
1183         return retval;
1184 }
1185 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1186
1187 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1188 {
1189         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1190
1191         /*
1192          * Disable radio.
1193          */
1194         rt2x00lib_disable_radio(rt2x00dev);
1195
1196         /*
1197          * Uninitialize device.
1198          */
1199         rt2x00lib_uninitialize(rt2x00dev);
1200
1201         /*
1202          * Close debugfs entry.
1203          */
1204         rt2x00debug_deregister(rt2x00dev);
1205
1206         /*
1207          * Free rfkill
1208          */
1209         rt2x00rfkill_free(rt2x00dev);
1210
1211         /*
1212          * Free LED.
1213          */
1214         rt2x00leds_unregister(rt2x00dev);
1215
1216         /*
1217          * Free ieee80211_hw memory.
1218          */
1219         rt2x00lib_remove_hw(rt2x00dev);
1220
1221         /*
1222          * Free firmware image.
1223          */
1224         rt2x00lib_free_firmware(rt2x00dev);
1225
1226         /*
1227          * Free queue structures.
1228          */
1229         rt2x00queue_free(rt2x00dev);
1230 }
1231 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1232
1233 /*
1234  * Device state handlers
1235  */
1236 #ifdef CONFIG_PM
1237 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1238 {
1239         int retval;
1240
1241         NOTICE(rt2x00dev, "Going to sleep.\n");
1242         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1243
1244         /*
1245          * Only continue if mac80211 has open interfaces.
1246          */
1247         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1248                 goto exit;
1249         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1250
1251         /*
1252          * Disable radio and unitialize all items
1253          * that must be recreated on resume.
1254          */
1255         rt2x00lib_stop(rt2x00dev);
1256         rt2x00lib_uninitialize(rt2x00dev);
1257         rt2x00leds_suspend(rt2x00dev);
1258         rt2x00debug_deregister(rt2x00dev);
1259
1260 exit:
1261         /*
1262          * Set device mode to sleep for power management.
1263          */
1264         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1265         if (retval)
1266                 return retval;
1267
1268         return 0;
1269 }
1270 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1271
1272 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1273                                   struct ieee80211_vif *vif)
1274 {
1275         struct rt2x00_dev *rt2x00dev = data;
1276         struct rt2x00_intf *intf = vif_to_intf(vif);
1277
1278         spin_lock(&intf->lock);
1279
1280         rt2x00lib_config_intf(rt2x00dev, intf,
1281                               vif->type, intf->mac, intf->bssid);
1282
1283
1284         /*
1285          * Master or Ad-hoc mode require a new beacon update.
1286          */
1287         if (vif->type == IEEE80211_IF_TYPE_AP ||
1288             vif->type == IEEE80211_IF_TYPE_IBSS)
1289                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1290
1291         spin_unlock(&intf->lock);
1292 }
1293
1294 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1295 {
1296         int retval;
1297
1298         NOTICE(rt2x00dev, "Waking up.\n");
1299
1300         /*
1301          * Open the debugfs entry and restore led handling.
1302          */
1303         rt2x00debug_register(rt2x00dev);
1304         rt2x00leds_resume(rt2x00dev);
1305
1306         /*
1307          * Only continue if mac80211 had open interfaces.
1308          */
1309         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1310                 return 0;
1311
1312         /*
1313          * Reinitialize device and all active interfaces.
1314          */
1315         retval = rt2x00lib_start(rt2x00dev);
1316         if (retval)
1317                 goto exit;
1318
1319         /*
1320          * Reconfigure device.
1321          */
1322         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1323         if (!rt2x00dev->hw->conf.radio_enabled)
1324                 rt2x00lib_disable_radio(rt2x00dev);
1325
1326         /*
1327          * Iterator over each active interface to
1328          * reconfigure the hardware.
1329          */
1330         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1331                                             rt2x00lib_resume_intf, rt2x00dev);
1332
1333         /*
1334          * We are ready again to receive requests from mac80211.
1335          */
1336         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1337
1338         /*
1339          * It is possible that during that mac80211 has attempted
1340          * to send frames while we were suspending or resuming.
1341          * In that case we have disabled the TX queue and should
1342          * now enable it again
1343          */
1344         ieee80211_start_queues(rt2x00dev->hw);
1345
1346         /*
1347          * During interface iteration we might have changed the
1348          * delayed_flags, time to handles the event by calling
1349          * the work handler directly.
1350          */
1351         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1352
1353         return 0;
1354
1355 exit:
1356         rt2x00lib_disable_radio(rt2x00dev);
1357         rt2x00lib_uninitialize(rt2x00dev);
1358         rt2x00debug_deregister(rt2x00dev);
1359
1360         return retval;
1361 }
1362 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1363 #endif /* CONFIG_PM */
1364
1365 /*
1366  * rt2x00lib module information.
1367  */
1368 MODULE_AUTHOR(DRV_PROJECT);
1369 MODULE_VERSION(DRV_VERSION);
1370 MODULE_DESCRIPTION("rt2x00 library");
1371 MODULE_LICENSE("GPL");