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
 118         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 119
 120         /*
 121          * Enable RX.
 122          */
 123         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 124
 125         /*
 126          * Start the TX queues.
 127          */
 128         ieee80211_start_queues(rt2x00dev->hw);
 129
 130         return 0;
 131 }
 132
 133 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 134 {
 135         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 136                 return;
 137
 138         /*
 139          * Stop all scheduled work.
 140          */
 141         if (work_pending(&rt2x00dev->intf_work))
 142                 cancel_work_sync(&rt2x00dev->intf_work);
 143         if (work_pending(&rt2x00dev->filter_work))
 144                 cancel_work_sync(&rt2x00dev->filter_work);
 145
 146         /*
 147          * Stop the TX queues.
 148          */
 149         ieee80211_stop_queues(rt2x00dev->hw);
 150
 151         /*
 152          * Disable RX.
 153          */
 154         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 155
 156         /*
 157          * Disable radio.
 158          */
 159         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 160         rt2x00leds_led_radio(rt2x00dev, false);
 161 }
 162
 163 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 164 {
 165         /*
 166          * When we are disabling the RX, we should also stop the link tuner.
 167          */
 168         if (state == STATE_RADIO_RX_OFF)
 169                 rt2x00lib_stop_link_tuner(rt2x00dev);
 170
 171         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 172
 173         /*
 174          * When we are enabling the RX, we should also start the link tuner.
 175          */
 176         if (state == STATE_RADIO_RX_ON &&
 177             (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
 178                 rt2x00lib_start_link_tuner(rt2x00dev);
 179 }
 180
 181 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 182 {
 183         enum antenna rx = rt2x00dev->link.ant.active.rx;
 184         enum antenna tx = rt2x00dev->link.ant.active.tx;
 185         int sample_a =
 186             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 187         int sample_b =
 188             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 189
 190         /*
 191          * We are done sampling. Now we should evaluate the results.
 192          */
 193         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 194
 195         /*
 196          * During the last period we have sampled the RSSI
 197          * from both antenna's. It now is time to determine
 198          * which antenna demonstrated the best performance.
 199          * When we are already on the antenna with the best
 200          * performance, then there really is nothing for us
 201          * left to do.
 202          */
 203         if (sample_a == sample_b)
 204                 return;
 205
 206         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 207                 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 208
 209         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 210                 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 211
 212         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 213 }
 214
 215 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 216 {
 217         enum antenna rx = rt2x00dev->link.ant.active.rx;
 218         enum antenna tx = rt2x00dev->link.ant.active.tx;
 219         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 220         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 221
 222         /*
 223          * Legacy driver indicates that we should swap antenna's
 224          * when the difference in RSSI is greater that 5. This
 225          * also should be done when the RSSI was actually better
 226          * then the previous sample.
 227          * When the difference exceeds the threshold we should
 228          * sample the rssi from the other antenna to make a valid
 229          * comparison between the 2 antennas.
 230          */
 231         if (abs(rssi_curr - rssi_old) < 5)
 232                 return;
 233
 234         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 235
 236         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 237                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 238
 239         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 240                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 241
 242         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 243 }
 244
 245 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 246 {
 247         /*
 248          * Determine if software diversity is enabled for
 249          * either the TX or RX antenna (or both).
 250          * Always perform this check since within the link
 251          * tuner interval the configuration might have changed.
 252          */
 253         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 254         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 255
 256         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 257             rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
 258                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 259         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 260             rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
 261                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 262
 263         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 264             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 265                 rt2x00dev->link.ant.flags = 0;
 266                 return;
 267         }
 268
 269         /*
 270          * If we have only sampled the data over the last period
 271          * we should now harvest the data. Otherwise just evaluate
 272          * the data. The latter should only be performed once
 273          * every 2 seconds.
 274          */
 275         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 276                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 277         else if (rt2x00dev->link.count & 1)
 278                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 279 }
 280
 281 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 282 {
 283         int avg_rssi = rssi;
 284
 285         /*
 286          * Update global RSSI
 287          */
 288         if (link->qual.avg_rssi)
 289                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 290         link->qual.avg_rssi = avg_rssi;
 291
 292         /*
 293          * Update antenna RSSI
 294          */
 295         if (link->ant.rssi_ant)
 296                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 297         link->ant.rssi_ant = rssi;
 298 }
 299
 300 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 301 {
 302         if (qual->rx_failed || qual->rx_success)
 303                 qual->rx_percentage =
 304                     (qual->rx_success * 100) /
 305                     (qual->rx_failed + qual->rx_success);
 306         else
 307                 qual->rx_percentage = 50;
 308
 309         if (qual->tx_failed || qual->tx_success)
 310                 qual->tx_percentage =
 311                     (qual->tx_success * 100) /
 312                     (qual->tx_failed + qual->tx_success);
 313         else
 314                 qual->tx_percentage = 50;
 315
 316         qual->rx_success = 0;
 317         qual->rx_failed = 0;
 318         qual->tx_success = 0;
 319         qual->tx_failed = 0;
 320 }
 321
 322 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 323                                            int rssi)
 324 {
 325         int rssi_percentage = 0;
 326         int signal;
 327
 328         /*
 329          * We need a positive value for the RSSI.
 330          */
 331         if (rssi < 0)
 332                 rssi += rt2x00dev->rssi_offset;
 333
 334         /*
 335          * Calculate the different percentages,
 336          * which will be used for the signal.
 337          */
 338         if (rt2x00dev->rssi_offset)
 339                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 340
 341         /*
 342          * Add the individual percentages and use the WEIGHT
 343          * defines to calculate the current link signal.
 344          */
 345         signal = ((WEIGHT_RSSI * rssi_percentage) +
 346                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 347                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 348
 349         return (signal > 100) ? 100 : signal;
 350 }
 351
 352 static void rt2x00lib_link_tuner(struct work_struct *work)
 353 {
 354         struct rt2x00_dev *rt2x00dev =
 355             container_of(work, struct rt2x00_dev, link.work.work);
 356
 357         /*
 358          * When the radio is shutting down we should
 359          * immediately cease all link tuning.
 360          */
 361         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 362                 return;
 363
 364         /*
 365          * Update statistics.
 366          */
 367         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 368         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 369             rt2x00dev->link.qual.rx_failed;
 370
 371         /*
 372          * Only perform the link tuning when Link tuning
 373          * has been enabled (This could have been disabled from the EEPROM).
 374          */
 375         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 376                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 377
 378         /*
 379          * Precalculate a portion of the link signal which is
 380          * in based on the tx/rx success/failure counters.
 381          */
 382         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 383
 384         /*
 385          * Send a signal to the led to update the led signal strength.
 386          */
 387         rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
 388
 389         /*
 390          * Evaluate antenna setup, make this the last step since this could
 391          * possibly reset some statistics.
 392          */
 393         rt2x00lib_evaluate_antenna(rt2x00dev);
 394
 395         /*
 396          * Increase tuner counter, and reschedule the next link tuner run.
 397          */
 398         rt2x00dev->link.count++;
 399         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 400                            LINK_TUNE_INTERVAL);
 401 }
 402
 403 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 404 {
 405         struct rt2x00_dev *rt2x00dev =
 406             container_of(work, struct rt2x00_dev, filter_work);
 407
 408         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 409 }
 410
 411 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 412                                           struct ieee80211_vif *vif)
 413 {
 414         struct rt2x00_dev *rt2x00dev = data;
 415         struct rt2x00_intf *intf = vif_to_intf(vif);
 416         struct sk_buff *skb;
 417         struct ieee80211_tx_control control;
 418         struct ieee80211_bss_conf conf;
 419         int delayed_flags;
 420
 421         /*
 422          * Copy all data we need during this action under the protection
 423          * of a spinlock. Otherwise race conditions might occur which results
 424          * into an invalid configuration.
 425          */
 426         spin_lock(&intf->lock);
 427
 428         memcpy(&conf, &intf->conf, sizeof(conf));
 429         delayed_flags = intf->delayed_flags;
 430         intf->delayed_flags = 0;
 431
 432         spin_unlock(&intf->lock);
 433
 434         if (delayed_flags & DELAYED_UPDATE_BEACON) {
 435                 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
 436                 if (skb && rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
 437                                                              skb, &control))
 438                         dev_kfree_skb(skb);
 439         }
 440
 441         if (delayed_flags & DELAYED_CONFIG_ERP)
 442                 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
 443
 444         if (delayed_flags & DELAYED_LED_ASSOC)
 445                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 446 }
 447
 448 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 449 {
 450         struct rt2x00_dev *rt2x00dev =
 451             container_of(work, struct rt2x00_dev, intf_work);
 452
 453         /*
 454          * Iterate over each interface and perform the
 455          * requested configurations.
 456          */
 457         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 458                                             rt2x00lib_intf_scheduled_iter,
 459                                             rt2x00dev);
 460 }
 461
 462 /*
 463  * Interrupt context handlers.
 464  */
 465 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 466                                       struct ieee80211_vif *vif)
 467 {
 468         struct rt2x00_intf *intf = vif_to_intf(vif);
 469
 470         if (vif->type != IEEE80211_IF_TYPE_AP &&
 471             vif->type != IEEE80211_IF_TYPE_IBSS)
 472                 return;
 473
 474         spin_lock(&intf->lock);
 475         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 476         spin_unlock(&intf->lock);
 477 }
 478
 479 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 480 {
 481         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 482                 return;
 483
 484         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 485                                             rt2x00lib_beacondone_iter,
 486                                             rt2x00dev);
 487
 488         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 489 }
 490 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 491
 492 void rt2x00lib_txdone(struct queue_entry *entry,
 493                       struct txdone_entry_desc *txdesc)
 494 {
 495         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 496         struct skb_frame_desc *skbdesc;
 497         struct ieee80211_tx_status tx_status;
 498         int success = !!(txdesc->status == TX_SUCCESS ||
 499                          txdesc->status == TX_SUCCESS_RETRY);
 500         int fail = !!(txdesc->status == TX_FAIL_RETRY ||
 501                       txdesc->status == TX_FAIL_INVALID ||
 502                       txdesc->status == TX_FAIL_OTHER);
 503
 504         /*
 505          * Update TX statistics.
 506          */
 507         rt2x00dev->link.qual.tx_success += success;
 508         rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
 509
 510         /*
 511          * Initialize TX status
 512          */
 513         tx_status.flags = 0;
 514         tx_status.ack_signal = 0;
 515         tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
 516         tx_status.retry_count = txdesc->retry;
 517         memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
 518
 519         if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 520                 if (success)
 521                         tx_status.flags |= IEEE80211_TX_STATUS_ACK;
 522                 else
 523                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 524         }
 525
 526         tx_status.queue_length = entry->queue->limit;
 527         tx_status.queue_number = tx_status.control.queue;
 528
 529         if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 530                 if (success)
 531                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 532                 else
 533                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 534         }
 535
 536         /*
 537          * Send the tx_status to debugfs. Only send the status report
 538          * to mac80211 when the frame originated from there. If this was
 539          * a extra frame coming through a mac80211 library call (RTS/CTS)
 540          * then we should not send the status report back.
 541          * If send to mac80211, mac80211 will clean up the skb structure,
 542          * otherwise we have to do it ourself.
 543          */
 544         skbdesc = get_skb_frame_desc(entry->skb);
 545         skbdesc->frame_type = DUMP_FRAME_TXDONE;
 546
 547         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 548
 549         if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
 550                 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
 551                                             entry->skb, &tx_status);
 552         else
 553                 dev_kfree_skb(entry->skb);
 554         entry->skb = NULL;
 555 }
 556 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 557
 558 void rt2x00lib_rxdone(struct queue_entry *entry,
 559                       struct rxdone_entry_desc *rxdesc)
 560 {
 561         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 562         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 563         struct ieee80211_supported_band *sband;
 564         struct ieee80211_hdr *hdr;
 565         const struct rt2x00_rate *rate;
 566         unsigned int i;
 567         int idx = -1;
 568         u16 fc;
 569
 570         /*
 571          * Update RX statistics.
 572          */
 573         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 574         for (i = 0; i < sband->n_bitrates; i++) {
 575                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 576
 577                 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 578                      (rate->plcp == rxdesc->signal)) ||
 579                     (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 580                       (rate->bitrate == rxdesc->signal))) {
 581                         idx = i;
 582                         break;
 583                 }
 584         }
 585
 586         if (idx < 0) {
 587                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 588                         "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
 589                         !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
 590                 idx = 0;
 591         }
 592
 593         /*
 594          * Only update link status if this is a beacon frame carrying our bssid.
 595          */
 596         hdr = (struct ieee80211_hdr *)entry->skb->data;
 597         fc = le16_to_cpu(hdr->frame_control);
 598         if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
 599                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
 600
 601         rt2x00dev->link.qual.rx_success++;
 602
 603         rx_status->rate_idx = idx;
 604         rx_status->signal =
 605             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
 606         rx_status->ssi = rxdesc->rssi;
 607         rx_status->flag = rxdesc->flags;
 608         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 609
 610         /*
 611          * Send frame to mac80211 & debugfs.
 612          * mac80211 will clean up the skb structure.
 613          */
 614         get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
 615         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 616         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 617         entry->skb = NULL;
 618 }
 619 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 620
 621 /*
 622  * TX descriptor initializer
 623  */
 624 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 625                              struct sk_buff *skb,
 626                              struct ieee80211_tx_control *control)
 627 {
 628         struct txentry_desc txdesc;
 629         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 630         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
 631         const struct rt2x00_rate *rate;
 632         int tx_rate;
 633         int length;
 634         int duration;
 635         int residual;
 636         u16 frame_control;
 637         u16 seq_ctrl;
 638
 639         memset(&txdesc, 0, sizeof(txdesc));
 640
 641         txdesc.queue = skbdesc->entry->queue->qid;
 642         txdesc.cw_min = skbdesc->entry->queue->cw_min;
 643         txdesc.cw_max = skbdesc->entry->queue->cw_max;
 644         txdesc.aifs = skbdesc->entry->queue->aifs;
 645
 646         /*
 647          * Read required fields from ieee80211 header.
 648          */
 649         frame_control = le16_to_cpu(hdr->frame_control);
 650         seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
 651
 652         tx_rate = control->tx_rate->hw_value;
 653
 654         /*
 655          * Check whether this frame is to be acked
 656          */
 657         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 658                 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 659
 660         /*
 661          * Check if this is a RTS/CTS frame
 662          */
 663         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 664                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 665                 if (is_rts_frame(frame_control)) {
 666                         __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
 667                         __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 668                 } else
 669                         __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
 670                 if (control->rts_cts_rate)
 671                         tx_rate = control->rts_cts_rate->hw_value;
 672         }
 673
 674         rate = rt2x00_get_rate(tx_rate);
 675
 676         /*
 677          * Check if more fragments are pending
 678          */
 679         if (ieee80211_get_morefrag(hdr)) {
 680                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 681                 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
 682         }
 683
 684         /*
 685          * Beacons and probe responses require the tsf timestamp
 686          * to be inserted into the frame.
 687          */
 688         if (control->queue == RT2X00_BCN_QUEUE_BEACON ||
 689             is_probe_resp(frame_control))
 690                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
 691
 692         /*
 693          * Determine with what IFS priority this frame should be send.
 694          * Set ifs to IFS_SIFS when the this is not the first fragment,
 695          * or this fragment came after RTS/CTS.
 696          */
 697         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 698             test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
 699                 txdesc.ifs = IFS_SIFS;
 700         else
 701                 txdesc.ifs = IFS_BACKOFF;
 702
 703         /*
 704          * PLCP setup
 705          * Length calculation depends on OFDM/CCK rate.
 706          */
 707         txdesc.signal = rate->plcp;
 708         txdesc.service = 0x04;
 709
 710         length = skbdesc->data_len + FCS_LEN;
 711         if (rate->flags & DEV_RATE_OFDM) {
 712                 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
 713
 714                 txdesc.length_high = (length >> 6) & 0x3f;
 715                 txdesc.length_low = length & 0x3f;
 716         } else {
 717                 /*
 718                  * Convert length to microseconds.
 719                  */
 720                 residual = get_duration_res(length, rate->bitrate);
 721                 duration = get_duration(length, rate->bitrate);
 722
 723                 if (residual != 0) {
 724                         duration++;
 725
 726                         /*
 727                          * Check if we need to set the Length Extension
 728                          */
 729                         if (rate->bitrate == 110 && residual <= 30)
 730                                 txdesc.service |= 0x80;
 731                 }
 732
 733                 txdesc.length_high = (duration >> 8) & 0xff;
 734                 txdesc.length_low = duration & 0xff;
 735
 736                 /*
 737                  * When preamble is enabled we should set the
 738                  * preamble bit for the signal.
 739                  */
 740                 if (rt2x00_get_rate_preamble(tx_rate))
 741                         txdesc.signal |= 0x08;
 742         }
 743
 744         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
 745
 746         /*
 747          * Update queue entry.
 748          */
 749         skbdesc->entry->skb = skb;
 750
 751         /*
 752          * The frame has been completely initialized and ready
 753          * for sending to the device. The caller will push the
 754          * frame to the device, but we are going to push the
 755          * frame to debugfs here.
 756          */
 757         skbdesc->frame_type = DUMP_FRAME_TX;
 758         rt2x00debug_dump_frame(rt2x00dev, skb);
 759 }
 760 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 761
 762 /*
 763  * Driver initialization handlers.
 764  */
 765 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 766         {
 767                 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
 768                 .bitrate = 10,
 769                 .ratemask = BIT(0),
 770                 .plcp = 0x00,
 771         },
 772         {
 773                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 774                 .bitrate = 20,
 775                 .ratemask = BIT(1),
 776                 .plcp = 0x01,
 777         },
 778         {
 779                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 780                 .bitrate = 55,
 781                 .ratemask = BIT(2),
 782                 .plcp = 0x02,
 783         },
 784         {
 785                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 786                 .bitrate = 110,
 787                 .ratemask = BIT(3),
 788                 .plcp = 0x03,
 789         },
 790         {
 791                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 792                 .bitrate = 60,
 793                 .ratemask = BIT(4),
 794                 .plcp = 0x0b,
 795         },
 796         {
 797                 .flags = DEV_RATE_OFDM,
 798                 .bitrate = 90,
 799                 .ratemask = BIT(5),
 800                 .plcp = 0x0f,
 801         },
 802         {
 803                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 804                 .bitrate = 120,
 805                 .ratemask = BIT(6),
 806                 .plcp = 0x0a,
 807         },
 808         {
 809                 .flags = DEV_RATE_OFDM,
 810                 .bitrate = 180,
 811                 .ratemask = BIT(7),
 812                 .plcp = 0x0e,
 813         },
 814         {
 815                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 816                 .bitrate = 240,
 817                 .ratemask = BIT(8),
 818                 .plcp = 0x09,
 819         },
 820         {
 821                 .flags = DEV_RATE_OFDM,
 822                 .bitrate = 360,
 823                 .ratemask = BIT(9),
 824                 .plcp = 0x0d,
 825         },
 826         {
 827                 .flags = DEV_RATE_OFDM,
 828                 .bitrate = 480,
 829                 .ratemask = BIT(10),
 830                 .plcp = 0x08,
 831         },
 832         {
 833                 .flags = DEV_RATE_OFDM,
 834                 .bitrate = 540,
 835                 .ratemask = BIT(11),
 836                 .plcp = 0x0c,
 837         },
 838 };
 839
 840 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 841                               const int channel, const int tx_power,
 842                               const int value)
 843 {
 844         entry->center_freq = ieee80211_channel_to_frequency(channel);
 845         entry->hw_value = value;
 846         entry->max_power = tx_power;
 847         entry->max_antenna_gain = 0xff;
 848 }
 849
 850 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 851                            const u16 index, const struct rt2x00_rate *rate)
 852 {
 853         entry->flags = 0;
 854         entry->bitrate = rate->bitrate;
 855         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 856         entry->hw_value_short = entry->hw_value;
 857
 858         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 859                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 860                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 861         }
 862 }
 863
 864 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 865                                     struct hw_mode_spec *spec)
 866 {
 867         struct ieee80211_hw *hw = rt2x00dev->hw;
 868         struct ieee80211_channel *channels;
 869         struct ieee80211_rate *rates;
 870         unsigned int num_rates;
 871         unsigned int i;
 872         unsigned char tx_power;
 873
 874         num_rates = 0;
 875         if (spec->supported_rates & SUPPORT_RATE_CCK)
 876                 num_rates += 4;
 877         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 878                 num_rates += 8;
 879
 880         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 881         if (!channels)
 882                 return -ENOMEM;
 883
 884         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 885         if (!rates)
 886                 goto exit_free_channels;
 887
 888         /*
 889          * Initialize Rate list.
 890          */
 891         for (i = 0; i < num_rates; i++)
 892                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 893
 894         /*
 895          * Initialize Channel list.
 896          */
 897         for (i = 0; i < spec->num_channels; i++) {
 898                 if (spec->channels[i].channel <= 14) {
 899                         if (spec->tx_power_bg)
 900                                 tx_power = spec->tx_power_bg[i];
 901                         else
 902                                 tx_power = spec->tx_power_default;
 903                 } else {
 904                         if (spec->tx_power_a)
 905                                 tx_power = spec->tx_power_a[i];
 906                         else
 907                                 tx_power = spec->tx_power_default;
 908                 }
 909
 910                 rt2x00lib_channel(&channels[i],
 911                                   spec->channels[i].channel, tx_power, i);
 912         }
 913
 914         /*
 915          * Intitialize 802.11b, 802.11g
 916          * Rates: CCK, OFDM.
 917          * Channels: 2.4 GHz
 918          */
 919         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 920                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 921                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 922                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 923                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 924                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 925                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 926         }
 927
 928         /*
 929          * Intitialize 802.11a
 930          * Rates: OFDM.
 931          * Channels: OFDM, UNII, HiperLAN2.
 932          */
 933         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 934                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 935                     spec->num_channels - 14;
 936                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 937                     num_rates - 4;
 938                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 939                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 940                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 941                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 942         }
 943
 944         return 0;
 945
 946  exit_free_channels:
 947         kfree(channels);
 948         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 949         return -ENOMEM;
 950 }
 951
 952 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 953 {
 954         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 955                 ieee80211_unregister_hw(rt2x00dev->hw);
 956
 957         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 958                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 959                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 960                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 961                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 962         }
 963 }
 964
 965 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 966 {
 967         struct hw_mode_spec *spec = &rt2x00dev->spec;
 968         int status;
 969
 970         /*
 971          * Initialize HW modes.
 972          */
 973         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 974         if (status)
 975                 return status;
 976
 977         /*
 978          * Register HW.
 979          */
 980         status = ieee80211_register_hw(rt2x00dev->hw);
 981         if (status) {
 982                 rt2x00lib_remove_hw(rt2x00dev);
 983                 return status;
 984         }
 985
 986         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 987
 988         return 0;
 989 }
 990
 991 /*
 992  * Initialization/uninitialization handlers.
 993  */
 994 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 995 {
 996         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 997                 return;
 998
 999         /*
1000          * Unregister extra components.
1001          */
1002         rt2x00rfkill_unregister(rt2x00dev);
1003
1004         /*
1005          * Allow the HW to uninitialize.
1006          */
1007         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1008
1009         /*
1010          * Free allocated queue entries.
1011          */
1012         rt2x00queue_uninitialize(rt2x00dev);
1013 }
1014
1015 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1016 {
1017         int status;
1018
1019         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1020                 return 0;
1021
1022         /*
1023          * Allocate all queue entries.
1024          */
1025         status = rt2x00queue_initialize(rt2x00dev);
1026         if (status)
1027                 return status;
1028
1029         /*
1030          * Initialize the device.
1031          */
1032         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1033         if (status)
1034                 goto exit;
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 exit:
1046         rt2x00lib_uninitialize(rt2x00dev);
1047
1048         return status;
1049 }
1050
1051 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1052 {
1053         int retval;
1054
1055         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1056                 return 0;
1057
1058         /*
1059          * If this is the first interface which is added,
1060          * we should load the firmware now.
1061          */
1062         retval = rt2x00lib_load_firmware(rt2x00dev);
1063         if (retval)
1064                 return retval;
1065
1066         /*
1067          * Initialize the device.
1068          */
1069         retval = rt2x00lib_initialize(rt2x00dev);
1070         if (retval)
1071                 return retval;
1072
1073         /*
1074          * Enable radio.
1075          */
1076         retval = rt2x00lib_enable_radio(rt2x00dev);
1077         if (retval) {
1078                 rt2x00lib_uninitialize(rt2x00dev);
1079                 return retval;
1080         }
1081
1082         rt2x00dev->intf_ap_count = 0;
1083         rt2x00dev->intf_sta_count = 0;
1084         rt2x00dev->intf_associated = 0;
1085
1086         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1087
1088         return 0;
1089 }
1090
1091 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1092 {
1093         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1094                 return;
1095
1096         /*
1097          * Perhaps we can add something smarter here,
1098          * but for now just disabling the radio should do.
1099          */
1100         rt2x00lib_disable_radio(rt2x00dev);
1101
1102         rt2x00dev->intf_ap_count = 0;
1103         rt2x00dev->intf_sta_count = 0;
1104         rt2x00dev->intf_associated = 0;
1105
1106         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1107 }
1108
1109 /*
1110  * driver allocation handlers.
1111  */
1112 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1113 {
1114         int retval = -ENOMEM;
1115
1116         /*
1117          * Make room for rt2x00_intf inside the per-interface
1118          * structure ieee80211_vif.
1119          */
1120         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1121
1122         /*
1123          * Let the driver probe the device to detect the capabilities.
1124          */
1125         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1126         if (retval) {
1127                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1128                 goto exit;
1129         }
1130
1131         /*
1132          * Initialize configuration work.
1133          */
1134         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1135         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1136         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1137
1138         /*
1139          * Allocate queue array.
1140          */
1141         retval = rt2x00queue_allocate(rt2x00dev);
1142         if (retval)
1143                 goto exit;
1144
1145         /*
1146          * Initialize ieee80211 structure.
1147          */
1148         retval = rt2x00lib_probe_hw(rt2x00dev);
1149         if (retval) {
1150                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1151                 goto exit;
1152         }
1153
1154         /*
1155          * Register extra components.
1156          */
1157         rt2x00leds_register(rt2x00dev);
1158         rt2x00rfkill_allocate(rt2x00dev);
1159         rt2x00debug_register(rt2x00dev);
1160
1161         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1162
1163         return 0;
1164
1165 exit:
1166         rt2x00lib_remove_dev(rt2x00dev);
1167
1168         return retval;
1169 }
1170 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1171
1172 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1173 {
1174         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1175
1176         /*
1177          * Disable radio.
1178          */
1179         rt2x00lib_disable_radio(rt2x00dev);
1180
1181         /*
1182          * Uninitialize device.
1183          */
1184         rt2x00lib_uninitialize(rt2x00dev);
1185
1186         /*
1187          * Free extra components
1188          */
1189         rt2x00debug_deregister(rt2x00dev);
1190         rt2x00rfkill_free(rt2x00dev);
1191         rt2x00leds_unregister(rt2x00dev);
1192
1193         /*
1194          * Free ieee80211_hw memory.
1195          */
1196         rt2x00lib_remove_hw(rt2x00dev);
1197
1198         /*
1199          * Free firmware image.
1200          */
1201         rt2x00lib_free_firmware(rt2x00dev);
1202
1203         /*
1204          * Free queue structures.
1205          */
1206         rt2x00queue_free(rt2x00dev);
1207 }
1208 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1209
1210 /*
1211  * Device state handlers
1212  */
1213 #ifdef CONFIG_PM
1214 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1215 {
1216         int retval;
1217
1218         NOTICE(rt2x00dev, "Going to sleep.\n");
1219         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1220
1221         /*
1222          * Only continue if mac80211 has open interfaces.
1223          */
1224         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1225                 goto exit;
1226         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1227
1228         /*
1229          * Disable radio.
1230          */
1231         rt2x00lib_stop(rt2x00dev);
1232         rt2x00lib_uninitialize(rt2x00dev);
1233
1234         /*
1235          * Suspend/disable extra components.
1236          */
1237         rt2x00leds_suspend(rt2x00dev);
1238         rt2x00rfkill_suspend(rt2x00dev);
1239         rt2x00debug_deregister(rt2x00dev);
1240
1241 exit:
1242         /*
1243          * Set device mode to sleep for power management,
1244          * on some hardware this call seems to consistently fail.
1245          * From the specifications it is hard to tell why it fails,
1246          * and if this is a "bad thing".
1247          * Overall it is safe to just ignore the failure and
1248          * continue suspending. The only downside is that the
1249          * device will not be in optimal power save mode, but with
1250          * the radio and the other components already disabled the
1251          * device is as good as disabled.
1252          */
1253         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1254         if (retval)
1255                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1256                         "continue suspending.\n");
1257
1258         return 0;
1259 }
1260 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1261
1262 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1263                                   struct ieee80211_vif *vif)
1264 {
1265         struct rt2x00_dev *rt2x00dev = data;
1266         struct rt2x00_intf *intf = vif_to_intf(vif);
1267
1268         spin_lock(&intf->lock);
1269
1270         rt2x00lib_config_intf(rt2x00dev, intf,
1271                               vif->type, intf->mac, intf->bssid);
1272
1273
1274         /*
1275          * Master or Ad-hoc mode require a new beacon update.
1276          */
1277         if (vif->type == IEEE80211_IF_TYPE_AP ||
1278             vif->type == IEEE80211_IF_TYPE_IBSS)
1279                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1280
1281         spin_unlock(&intf->lock);
1282 }
1283
1284 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1285 {
1286         int retval;
1287
1288         NOTICE(rt2x00dev, "Waking up.\n");
1289
1290         /*
1291          * Restore/enable extra components.
1292          */
1293         rt2x00debug_register(rt2x00dev);
1294         rt2x00rfkill_resume(rt2x00dev);
1295         rt2x00leds_resume(rt2x00dev);
1296
1297         /*
1298          * Only continue if mac80211 had open interfaces.
1299          */
1300         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1301                 return 0;
1302
1303         /*
1304          * Reinitialize device and all active interfaces.
1305          */
1306         retval = rt2x00lib_start(rt2x00dev);
1307         if (retval)
1308                 goto exit;
1309
1310         /*
1311          * Reconfigure device.
1312          */
1313         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1314         if (!rt2x00dev->hw->conf.radio_enabled)
1315                 rt2x00lib_disable_radio(rt2x00dev);
1316
1317         /*
1318          * Iterator over each active interface to
1319          * reconfigure the hardware.
1320          */
1321         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1322                                             rt2x00lib_resume_intf, rt2x00dev);
1323
1324         /*
1325          * We are ready again to receive requests from mac80211.
1326          */
1327         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1328
1329         /*
1330          * It is possible that during that mac80211 has attempted
1331          * to send frames while we were suspending or resuming.
1332          * In that case we have disabled the TX queue and should
1333          * now enable it again
1334          */
1335         ieee80211_start_queues(rt2x00dev->hw);
1336
1337         /*
1338          * During interface iteration we might have changed the
1339          * delayed_flags, time to handles the event by calling
1340          * the work handler directly.
1341          */
1342         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1343
1344         return 0;
1345
1346 exit:
1347         rt2x00lib_disable_radio(rt2x00dev);
1348         rt2x00lib_uninitialize(rt2x00dev);
1349         rt2x00debug_deregister(rt2x00dev);
1350
1351         return retval;
1352 }
1353 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1354 #endif /* CONFIG_PM */
1355
1356 /*
1357  * rt2x00lib module information.
1358  */
1359 MODULE_AUTHOR(DRV_PROJECT);
1360 MODULE_VERSION(DRV_VERSION);
1361 MODULE_DESCRIPTION("rt2x00 library");
1362 MODULE_LICENSE("GPL");