err.no Git - linux-2.6/blob - drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2007 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
  32 /*
  33  * Ring handler.
  34  */
  35 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
  36                                      const unsigned int queue)
  37 {
  38         int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
  39
  40         /*
  41          * Check if we are requesting a reqular TX ring,
  42          * or if we are requesting a Beacon or Atim ring.
  43          * For Atim rings, we should check if it is supported.
  44          */
  45         if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
  46                 return &rt2x00dev->tx[queue];
  47
  48         if (!rt2x00dev->bcn || !beacon)
  49                 return NULL;
  50
  51         if (queue == IEEE80211_TX_QUEUE_BEACON)
  52                 return &rt2x00dev->bcn[0];
  53         else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
  54                 return &rt2x00dev->bcn[1];
  55
  56         return NULL;
  57 }
  58 EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);
  59
  60 /*
  61  * Link tuning handlers
  62  */
  63 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  64 {
  65         rt2x00dev->link.count = 0;
  66         rt2x00dev->link.vgc_level = 0;
  67
  68         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  69
  70         /*
  71          * The RX and TX percentage should start at 50%
  72          * this will assure we will get at least get some
  73          * decent value when the link tuner starts.
  74          * The value will be dropped and overwritten with
  75          * the correct (measured )value anyway during the
  76          * first run of the link tuner.
  77          */
  78         rt2x00dev->link.qual.rx_percentage = 50;
  79         rt2x00dev->link.qual.tx_percentage = 50;
  80
  81         /*
  82          * Reset the link tuner.
  83          */
  84         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  85
  86         queue_delayed_work(rt2x00dev->hw->workqueue,
  87                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  88 }
  89
  90 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  91 {
  92         cancel_delayed_work_sync(&rt2x00dev->link.work);
  93 }
  94
  95 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  96 {
  97         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  98                 return;
  99
 100         rt2x00lib_stop_link_tuner(rt2x00dev);
 101         rt2x00lib_start_link_tuner(rt2x00dev);
 102 }
 103
 104 /*
 105  * Radio control handlers.
 106  */
 107 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
 108 {
 109         int status;
 110
 111         /*
 112          * Don't enable the radio twice.
 113          * And check if the hardware button has been disabled.
 114          */
 115         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
 116             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
 117                 return 0;
 118
 119         /*
 120          * Enable radio.
 121          */
 122         status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 123                                                        STATE_RADIO_ON);
 124         if (status)
 125                 return status;
 126
 127         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 128
 129         /*
 130          * Enable RX.
 131          */
 132         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 133
 134         /*
 135          * Start the TX queues.
 136          */
 137         ieee80211_start_queues(rt2x00dev->hw);
 138
 139         return 0;
 140 }
 141
 142 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 143 {
 144         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 145                 return;
 146
 147         /*
 148          * Stop all scheduled work.
 149          */
 150         if (work_pending(&rt2x00dev->beacon_work))
 151                 cancel_work_sync(&rt2x00dev->beacon_work);
 152         if (work_pending(&rt2x00dev->filter_work))
 153                 cancel_work_sync(&rt2x00dev->filter_work);
 154         if (work_pending(&rt2x00dev->config_work))
 155                 cancel_work_sync(&rt2x00dev->config_work);
 156
 157         /*
 158          * Stop the TX queues.
 159          */
 160         ieee80211_stop_queues(rt2x00dev->hw);
 161
 162         /*
 163          * Disable RX.
 164          */
 165         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 166
 167         /*
 168          * Disable radio.
 169          */
 170         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 171 }
 172
 173 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 174 {
 175         /*
 176          * When we are disabling the RX, we should also stop the link tuner.
 177          */
 178         if (state == STATE_RADIO_RX_OFF)
 179                 rt2x00lib_stop_link_tuner(rt2x00dev);
 180
 181         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 182
 183         /*
 184          * When we are enabling the RX, we should also start the link tuner.
 185          */
 186         if (state == STATE_RADIO_RX_ON &&
 187             is_interface_present(&rt2x00dev->interface))
 188                 rt2x00lib_start_link_tuner(rt2x00dev);
 189 }
 190
 191 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 192 {
 193         enum antenna rx = rt2x00dev->link.ant.active.rx;
 194         enum antenna tx = rt2x00dev->link.ant.active.tx;
 195         int sample_a =
 196             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 197         int sample_b =
 198             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 199
 200         /*
 201          * We are done sampling. Now we should evaluate the results.
 202          */
 203         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 204
 205         /*
 206          * During the last period we have sampled the RSSI
 207          * from both antenna's. It now is time to determine
 208          * which antenna demonstrated the best performance.
 209          * When we are already on the antenna with the best
 210          * performance, then there really is nothing for us
 211          * left to do.
 212          */
 213         if (sample_a == sample_b)
 214                 return;
 215
 216         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) {
 217                 if (sample_a > sample_b && rx == ANTENNA_B)
 218                         rx = ANTENNA_A;
 219                 else if (rx == ANTENNA_A)
 220                         rx = ANTENNA_B;
 221         }
 222
 223         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) {
 224                 if (sample_a > sample_b && tx == ANTENNA_B)
 225                         tx = ANTENNA_A;
 226                 else if (tx == ANTENNA_A)
 227                         tx = ANTENNA_B;
 228         }
 229
 230         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 231 }
 232
 233 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 234 {
 235         enum antenna rx = rt2x00dev->link.ant.active.rx;
 236         enum antenna tx = rt2x00dev->link.ant.active.tx;
 237         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 238         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 239
 240         /*
 241          * Legacy driver indicates that we should swap antenna's
 242          * when the difference in RSSI is greater that 5. This
 243          * also should be done when the RSSI was actually better
 244          * then the previous sample.
 245          * When the difference exceeds the threshold we should
 246          * sample the rssi from the other antenna to make a valid
 247          * comparison between the 2 antennas.
 248          */
 249         if ((rssi_curr - rssi_old) > -5 || (rssi_curr - rssi_old) < 5)
 250                 return;
 251
 252         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 253
 254         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 255                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 256
 257         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 258                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 259
 260         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 261 }
 262
 263 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 264 {
 265         /*
 266          * Determine if software diversity is enabled for
 267          * either the TX or RX antenna (or both).
 268          * Always perform this check since within the link
 269          * tuner interval the configuration might have changed.
 270          */
 271         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 272         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 273
 274         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 275             rt2x00dev->default_ant.rx != ANTENNA_SW_DIVERSITY)
 276                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 277         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 278             rt2x00dev->default_ant.tx != ANTENNA_SW_DIVERSITY)
 279                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 280
 281         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 282             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 283                 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 284                 return;
 285         }
 286
 287         /*
 288          * If we have only sampled the data over the last period
 289          * we should now harvest the data. Otherwise just evaluate
 290          * the data. The latter should only be performed once
 291          * every 2 seconds.
 292          */
 293         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 294                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 295         else if (rt2x00dev->link.count & 1)
 296                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 297 }
 298
 299 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 300 {
 301         int avg_rssi = rssi;
 302
 303         /*
 304          * Update global RSSI
 305          */
 306         if (link->qual.avg_rssi)
 307                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 308         link->qual.avg_rssi = avg_rssi;
 309
 310         /*
 311          * Update antenna RSSI
 312          */
 313         if (link->ant.rssi_ant)
 314                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 315         link->ant.rssi_ant = rssi;
 316 }
 317
 318 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 319 {
 320         if (qual->rx_failed || qual->rx_success)
 321                 qual->rx_percentage =
 322                     (qual->rx_success * 100) /
 323                     (qual->rx_failed + qual->rx_success);
 324         else
 325                 qual->rx_percentage = 50;
 326
 327         if (qual->tx_failed || qual->tx_success)
 328                 qual->tx_percentage =
 329                     (qual->tx_success * 100) /
 330                     (qual->tx_failed + qual->tx_success);
 331         else
 332                 qual->tx_percentage = 50;
 333
 334         qual->rx_success = 0;
 335         qual->rx_failed = 0;
 336         qual->tx_success = 0;
 337         qual->tx_failed = 0;
 338 }
 339
 340 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 341                                            int rssi)
 342 {
 343         int rssi_percentage = 0;
 344         int signal;
 345
 346         /*
 347          * We need a positive value for the RSSI.
 348          */
 349         if (rssi < 0)
 350                 rssi += rt2x00dev->rssi_offset;
 351
 352         /*
 353          * Calculate the different percentages,
 354          * which will be used for the signal.
 355          */
 356         if (rt2x00dev->rssi_offset)
 357                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 358
 359         /*
 360          * Add the individual percentages and use the WEIGHT
 361          * defines to calculate the current link signal.
 362          */
 363         signal = ((WEIGHT_RSSI * rssi_percentage) +
 364                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 365                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 366
 367         return (signal > 100) ? 100 : signal;
 368 }
 369
 370 static void rt2x00lib_link_tuner(struct work_struct *work)
 371 {
 372         struct rt2x00_dev *rt2x00dev =
 373             container_of(work, struct rt2x00_dev, link.work.work);
 374
 375         /*
 376          * When the radio is shutting down we should
 377          * immediately cease all link tuning.
 378          */
 379         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 380                 return;
 381
 382         /*
 383          * Update statistics.
 384          */
 385         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 386         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 387             rt2x00dev->link.qual.rx_failed;
 388
 389         /*
 390          * Only perform the link tuning when Link tuning
 391          * has been enabled (This could have been disabled from the EEPROM).
 392          */
 393         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 394                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 395
 396         /*
 397          * Evaluate antenna setup.
 398          */
 399         rt2x00lib_evaluate_antenna(rt2x00dev);
 400
 401         /*
 402          * Precalculate a portion of the link signal which is
 403          * in based on the tx/rx success/failure counters.
 404          */
 405         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 406
 407         /*
 408          * Increase tuner counter, and reschedule the next link tuner run.
 409          */
 410         rt2x00dev->link.count++;
 411         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 412                            LINK_TUNE_INTERVAL);
 413 }
 414
 415 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 416 {
 417         struct rt2x00_dev *rt2x00dev =
 418             container_of(work, struct rt2x00_dev, filter_work);
 419         unsigned int filter = rt2x00dev->interface.filter;
 420
 421         /*
 422          * Since we had stored the filter inside interface.filter,
 423          * we should now clear that field. Otherwise the driver will
 424          * assume nothing has changed (*total_flags will be compared
 425          * to interface.filter to determine if any action is required).
 426          */
 427         rt2x00dev->interface.filter = 0;
 428
 429         rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
 430                                              filter, &filter, 0, NULL);
 431 }
 432
 433 static void rt2x00lib_configuration_scheduled(struct work_struct *work)
 434 {
 435         struct rt2x00_dev *rt2x00dev =
 436             container_of(work, struct rt2x00_dev, config_work);
 437         int preamble = !test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
 438
 439         rt2x00mac_erp_ie_changed(rt2x00dev->hw,
 440                                  IEEE80211_ERP_CHANGE_PREAMBLE, 0, preamble);
 441 }
 442
 443 /*
 444  * Interrupt context handlers.
 445  */
 446 static void rt2x00lib_beacondone_scheduled(struct work_struct *work)
 447 {
 448         struct rt2x00_dev *rt2x00dev =
 449             container_of(work, struct rt2x00_dev, beacon_work);
 450         struct data_ring *ring =
 451             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
 452         struct data_entry *entry = rt2x00_get_data_entry(ring);
 453         struct sk_buff *skb;
 454
 455         skb = ieee80211_beacon_get(rt2x00dev->hw,
 456                                    rt2x00dev->interface.id,
 457                                    &entry->tx_status.control);
 458         if (!skb)
 459                 return;
 460
 461         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 462                                           &entry->tx_status.control);
 463
 464         dev_kfree_skb(skb);
 465 }
 466
 467 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 468 {
 469         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 470                 return;
 471
 472         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
 473 }
 474 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 475
 476 void rt2x00lib_txdone(struct data_entry *entry,
 477                       const int status, const int retry)
 478 {
 479         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 480         struct ieee80211_tx_status *tx_status = &entry->tx_status;
 481         struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
 482         int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
 483         int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
 484                       status == TX_FAIL_OTHER);
 485
 486         /*
 487          * Update TX statistics.
 488          */
 489         tx_status->flags = 0;
 490         tx_status->ack_signal = 0;
 491         tx_status->excessive_retries = (status == TX_FAIL_RETRY);
 492         tx_status->retry_count = retry;
 493         rt2x00dev->link.qual.tx_success += success;
 494         rt2x00dev->link.qual.tx_failed += retry + fail;
 495
 496         if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
 497                 if (success)
 498                         tx_status->flags |= IEEE80211_TX_STATUS_ACK;
 499                 else
 500                         stats->dot11ACKFailureCount++;
 501         }
 502
 503         tx_status->queue_length = entry->ring->stats.limit;
 504         tx_status->queue_number = tx_status->control.queue;
 505
 506         if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 507                 if (success)
 508                         stats->dot11RTSSuccessCount++;
 509                 else
 510                         stats->dot11RTSFailureCount++;
 511         }
 512
 513         /*
 514          * Send the tx_status to mac80211,
 515          * that method also cleans up the skb structure.
 516          */
 517         ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
 518         entry->skb = NULL;
 519 }
 520 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 521
 522 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 523                       struct rxdata_entry_desc *desc)
 524 {
 525         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 526         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 527         struct ieee80211_hw_mode *mode;
 528         struct ieee80211_rate *rate;
 529         unsigned int i;
 530         int val = 0;
 531
 532         /*
 533          * Update RX statistics.
 534          */
 535         mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
 536         for (i = 0; i < mode->num_rates; i++) {
 537                 rate = &mode->rates[i];
 538
 539                 /*
 540                  * When frame was received with an OFDM bitrate,
 541                  * the signal is the PLCP value. If it was received with
 542                  * a CCK bitrate the signal is the rate in 0.5kbit/s.
 543                  */
 544                 if (!desc->ofdm)
 545                         val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
 546                 else
 547                         val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
 548
 549                 if (val == desc->signal) {
 550                         val = rate->val;
 551                         break;
 552                 }
 553         }
 554
 555         rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi);
 556         rt2x00dev->link.qual.rx_success++;
 557
 558         rx_status->rate = val;
 559         rx_status->signal =
 560             rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
 561         rx_status->ssi = desc->rssi;
 562         rx_status->flag = desc->flags;
 563         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 564
 565         /*
 566          * Send frame to mac80211
 567          */
 568         ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
 569 }
 570 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 571
 572 /*
 573  * TX descriptor initializer
 574  */
 575 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 576                              __le32 *txd,
 577                              struct ieee80211_hdr *ieee80211hdr,
 578                              unsigned int length,
 579                              struct ieee80211_tx_control *control)
 580 {
 581         struct txdata_entry_desc desc;
 582         struct data_ring *ring;
 583         int tx_rate;
 584         int bitrate;
 585         int duration;
 586         int residual;
 587         u16 frame_control;
 588         u16 seq_ctrl;
 589
 590         /*
 591          * Make sure the descriptor is properly cleared.
 592          */
 593         memset(&desc, 0x00, sizeof(desc));
 594
 595         /*
 596          * Get ring pointer, if we fail to obtain the
 597          * correct ring, then use the first TX ring.
 598          */
 599         ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
 600         if (!ring)
 601                 ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
 602
 603         desc.cw_min = ring->tx_params.cw_min;
 604         desc.cw_max = ring->tx_params.cw_max;
 605         desc.aifs = ring->tx_params.aifs;
 606
 607         /*
 608          * Identify queue
 609          */
 610         if (control->queue < rt2x00dev->hw->queues)
 611                 desc.queue = control->queue;
 612         else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 613                  control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
 614                 desc.queue = QUEUE_MGMT;
 615         else
 616                 desc.queue = QUEUE_OTHER;
 617
 618         /*
 619          * Read required fields from ieee80211 header.
 620          */
 621         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
 622         seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
 623
 624         tx_rate = control->tx_rate;
 625
 626         /*
 627          * Check whether this frame is to be acked
 628          */
 629         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 630                 __set_bit(ENTRY_TXD_ACK, &desc.flags);
 631
 632         /*
 633          * Check if this is a RTS/CTS frame
 634          */
 635         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 636                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 637                 if (is_rts_frame(frame_control)) {
 638                         __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
 639                         __set_bit(ENTRY_TXD_ACK, &desc.flags);
 640                 } else
 641                         __clear_bit(ENTRY_TXD_ACK, &desc.flags);
 642                 if (control->rts_cts_rate)
 643                         tx_rate = control->rts_cts_rate;
 644         }
 645
 646         /*
 647          * Check for OFDM
 648          */
 649         if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
 650                 __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
 651
 652         /*
 653          * Check if more fragments are pending
 654          */
 655         if (ieee80211_get_morefrag(ieee80211hdr)) {
 656                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 657                 __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
 658         }
 659
 660         /*
 661          * Beacons and probe responses require the tsf timestamp
 662          * to be inserted into the frame.
 663          */
 664         if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 665             is_probe_resp(frame_control))
 666                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
 667
 668         /*
 669          * Determine with what IFS priority this frame should be send.
 670          * Set ifs to IFS_SIFS when the this is not the first fragment,
 671          * or this fragment came after RTS/CTS.
 672          */
 673         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 674             test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
 675                 desc.ifs = IFS_SIFS;
 676         else
 677                 desc.ifs = IFS_BACKOFF;
 678
 679         /*
 680          * PLCP setup
 681          * Length calculation depends on OFDM/CCK rate.
 682          */
 683         desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
 684         desc.service = 0x04;
 685
 686         if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
 687                 desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
 688                 desc.length_low = ((length + FCS_LEN) & 0x3f);
 689         } else {
 690                 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
 691
 692                 /*
 693                  * Convert length to microseconds.
 694                  */
 695                 residual = get_duration_res(length + FCS_LEN, bitrate);
 696                 duration = get_duration(length + FCS_LEN, bitrate);
 697
 698                 if (residual != 0) {
 699                         duration++;
 700
 701                         /*
 702                          * Check if we need to set the Length Extension
 703                          */
 704                         if (bitrate == 110 && residual <= 30)
 705                                 desc.service |= 0x80;
 706                 }
 707
 708                 desc.length_high = (duration >> 8) & 0xff;
 709                 desc.length_low = duration & 0xff;
 710
 711                 /*
 712                  * When preamble is enabled we should set the
 713                  * preamble bit for the signal.
 714                  */
 715                 if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
 716                         desc.signal |= 0x08;
 717         }
 718
 719         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc,
 720                                            ieee80211hdr, length, control);
 721 }
 722 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 723
 724 /*
 725  * Driver initialization handlers.
 726  */
 727 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 728                               const int channel, const int tx_power,
 729                               const int value)
 730 {
 731         entry->chan = channel;
 732         if (channel <= 14)
 733                 entry->freq = 2407 + (5 * channel);
 734         else
 735                 entry->freq = 5000 + (5 * channel);
 736         entry->val = value;
 737         entry->flag =
 738             IEEE80211_CHAN_W_IBSS |
 739             IEEE80211_CHAN_W_ACTIVE_SCAN |
 740             IEEE80211_CHAN_W_SCAN;
 741         entry->power_level = tx_power;
 742         entry->antenna_max = 0xff;
 743 }
 744
 745 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 746                            const int rate, const int mask,
 747                            const int plcp, const int flags)
 748 {
 749         entry->rate = rate;
 750         entry->val =
 751             DEVICE_SET_RATE_FIELD(rate, RATE) |
 752             DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
 753             DEVICE_SET_RATE_FIELD(plcp, PLCP);
 754         entry->flags = flags;
 755         entry->val2 = entry->val;
 756         if (entry->flags & IEEE80211_RATE_PREAMBLE2)
 757                 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
 758         entry->min_rssi_ack = 0;
 759         entry->min_rssi_ack_delta = 0;
 760 }
 761
 762 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 763                                     struct hw_mode_spec *spec)
 764 {
 765         struct ieee80211_hw *hw = rt2x00dev->hw;
 766         struct ieee80211_hw_mode *hwmodes;
 767         struct ieee80211_channel *channels;
 768         struct ieee80211_rate *rates;
 769         unsigned int i;
 770         unsigned char tx_power;
 771
 772         hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
 773         if (!hwmodes)
 774                 goto exit;
 775
 776         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 777         if (!channels)
 778                 goto exit_free_modes;
 779
 780         rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
 781         if (!rates)
 782                 goto exit_free_channels;
 783
 784         /*
 785          * Initialize Rate list.
 786          */
 787         rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
 788                        0x00, IEEE80211_RATE_CCK);
 789         rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
 790                        0x01, IEEE80211_RATE_CCK_2);
 791         rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
 792                        0x02, IEEE80211_RATE_CCK_2);
 793         rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
 794                        0x03, IEEE80211_RATE_CCK_2);
 795
 796         if (spec->num_rates > 4) {
 797                 rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
 798                                0x0b, IEEE80211_RATE_OFDM);
 799                 rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
 800                                0x0f, IEEE80211_RATE_OFDM);
 801                 rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
 802                                0x0a, IEEE80211_RATE_OFDM);
 803                 rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
 804                                0x0e, IEEE80211_RATE_OFDM);
 805                 rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
 806                                0x09, IEEE80211_RATE_OFDM);
 807                 rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
 808                                0x0d, IEEE80211_RATE_OFDM);
 809                 rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
 810                                0x08, IEEE80211_RATE_OFDM);
 811                 rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
 812                                0x0c, IEEE80211_RATE_OFDM);
 813         }
 814
 815         /*
 816          * Initialize Channel list.
 817          */
 818         for (i = 0; i < spec->num_channels; i++) {
 819                 if (spec->channels[i].channel <= 14)
 820                         tx_power = spec->tx_power_bg[i];
 821                 else if (spec->tx_power_a)
 822                         tx_power = spec->tx_power_a[i];
 823                 else
 824                         tx_power = spec->tx_power_default;
 825
 826                 rt2x00lib_channel(&channels[i],
 827                                   spec->channels[i].channel, tx_power, i);
 828         }
 829
 830         /*
 831          * Intitialize 802.11b
 832          * Rates: CCK.
 833          * Channels: OFDM.
 834          */
 835         if (spec->num_modes > HWMODE_B) {
 836                 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
 837                 hwmodes[HWMODE_B].num_channels = 14;
 838                 hwmodes[HWMODE_B].num_rates = 4;
 839                 hwmodes[HWMODE_B].channels = channels;
 840                 hwmodes[HWMODE_B].rates = rates;
 841         }
 842
 843         /*
 844          * Intitialize 802.11g
 845          * Rates: CCK, OFDM.
 846          * Channels: OFDM.
 847          */
 848         if (spec->num_modes > HWMODE_G) {
 849                 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
 850                 hwmodes[HWMODE_G].num_channels = 14;
 851                 hwmodes[HWMODE_G].num_rates = spec->num_rates;
 852                 hwmodes[HWMODE_G].channels = channels;
 853                 hwmodes[HWMODE_G].rates = rates;
 854         }
 855
 856         /*
 857          * Intitialize 802.11a
 858          * Rates: OFDM.
 859          * Channels: OFDM, UNII, HiperLAN2.
 860          */
 861         if (spec->num_modes > HWMODE_A) {
 862                 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
 863                 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
 864                 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
 865                 hwmodes[HWMODE_A].channels = &channels[14];
 866                 hwmodes[HWMODE_A].rates = &rates[4];
 867         }
 868
 869         if (spec->num_modes > HWMODE_G &&
 870             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
 871                 goto exit_free_rates;
 872
 873         if (spec->num_modes > HWMODE_B &&
 874             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
 875                 goto exit_free_rates;
 876
 877         if (spec->num_modes > HWMODE_A &&
 878             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
 879                 goto exit_free_rates;
 880
 881         rt2x00dev->hwmodes = hwmodes;
 882
 883         return 0;
 884
 885 exit_free_rates:
 886         kfree(rates);
 887
 888 exit_free_channels:
 889         kfree(channels);
 890
 891 exit_free_modes:
 892         kfree(hwmodes);
 893
 894 exit:
 895         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 896         return -ENOMEM;
 897 }
 898
 899 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 900 {
 901         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 902                 ieee80211_unregister_hw(rt2x00dev->hw);
 903
 904         if (likely(rt2x00dev->hwmodes)) {
 905                 kfree(rt2x00dev->hwmodes->channels);
 906                 kfree(rt2x00dev->hwmodes->rates);
 907                 kfree(rt2x00dev->hwmodes);
 908                 rt2x00dev->hwmodes = NULL;
 909         }
 910 }
 911
 912 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 913 {
 914         struct hw_mode_spec *spec = &rt2x00dev->spec;
 915         int status;
 916
 917         /*
 918          * Initialize HW modes.
 919          */
 920         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 921         if (status)
 922                 return status;
 923
 924         /*
 925          * Register HW.
 926          */
 927         status = ieee80211_register_hw(rt2x00dev->hw);
 928         if (status) {
 929                 rt2x00lib_remove_hw(rt2x00dev);
 930                 return status;
 931         }
 932
 933         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 934
 935         return 0;
 936 }
 937
 938 /*
 939  * Initialization/uninitialization handlers.
 940  */
 941 static int rt2x00lib_alloc_entries(struct data_ring *ring,
 942                                    const u16 max_entries, const u16 data_size,
 943                                    const u16 desc_size)
 944 {
 945         struct data_entry *entry;
 946         unsigned int i;
 947
 948         ring->stats.limit = max_entries;
 949         ring->data_size = data_size;
 950         ring->desc_size = desc_size;
 951
 952         /*
 953          * Allocate all ring entries.
 954          */
 955         entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
 956         if (!entry)
 957                 return -ENOMEM;
 958
 959         for (i = 0; i < ring->stats.limit; i++) {
 960                 entry[i].flags = 0;
 961                 entry[i].ring = ring;
 962                 entry[i].skb = NULL;
 963         }
 964
 965         ring->entry = entry;
 966
 967         return 0;
 968 }
 969
 970 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
 971 {
 972         struct data_ring *ring;
 973
 974         /*
 975          * Allocate the RX ring.
 976          */
 977         if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
 978                                     rt2x00dev->ops->rxd_size))
 979                 return -ENOMEM;
 980
 981         /*
 982          * First allocate the TX rings.
 983          */
 984         txring_for_each(rt2x00dev, ring) {
 985                 if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
 986                                             rt2x00dev->ops->txd_size))
 987                         return -ENOMEM;
 988         }
 989
 990         if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
 991                 return 0;
 992
 993         /*
 994          * Allocate the BEACON ring.
 995          */
 996         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
 997                                     MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
 998                 return -ENOMEM;
 999
1000         /*
1001          * Allocate the Atim ring.
1002          */
1003         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
1004                                     DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
1005                 return -ENOMEM;
1006
1007         return 0;
1008 }
1009
1010 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
1011 {
1012         struct data_ring *ring;
1013
1014         ring_for_each(rt2x00dev, ring) {
1015                 kfree(ring->entry);
1016                 ring->entry = NULL;
1017         }
1018 }
1019
1020 void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
1021 {
1022         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1023                 return;
1024
1025         /*
1026          * Unregister rfkill.
1027          */
1028         rt2x00rfkill_unregister(rt2x00dev);
1029
1030         /*
1031          * Allow the HW to uninitialize.
1032          */
1033         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1034
1035         /*
1036          * Free allocated ring entries.
1037          */
1038         rt2x00lib_free_ring_entries(rt2x00dev);
1039 }
1040
1041 int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1042 {
1043         int status;
1044
1045         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1046                 return 0;
1047
1048         /*
1049          * Allocate all ring entries.
1050          */
1051         status = rt2x00lib_alloc_ring_entries(rt2x00dev);
1052         if (status) {
1053                 ERROR(rt2x00dev, "Ring entries allocation failed.\n");
1054                 return status;
1055         }
1056
1057         /*
1058          * Initialize the device.
1059          */
1060         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1061         if (status)
1062                 goto exit;
1063
1064         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1065
1066         /*
1067          * Register the rfkill handler.
1068          */
1069         status = rt2x00rfkill_register(rt2x00dev);
1070         if (status)
1071                 goto exit_unitialize;
1072
1073         return 0;
1074
1075 exit_unitialize:
1076         rt2x00lib_uninitialize(rt2x00dev);
1077
1078 exit:
1079         rt2x00lib_free_ring_entries(rt2x00dev);
1080
1081         return status;
1082 }
1083
1084 /*
1085  * driver allocation handlers.
1086  */
1087 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
1088 {
1089         struct data_ring *ring;
1090
1091         /*
1092          * We need the following rings:
1093          * RX: 1
1094          * TX: hw->queues
1095          * Beacon: 1 (if required)
1096          * Atim: 1 (if required)
1097          */
1098         rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
1099             (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags));
1100
1101         ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
1102         if (!ring) {
1103                 ERROR(rt2x00dev, "Ring allocation failed.\n");
1104                 return -ENOMEM;
1105         }
1106
1107         /*
1108          * Initialize pointers
1109          */
1110         rt2x00dev->rx = ring;
1111         rt2x00dev->tx = &rt2x00dev->rx[1];
1112         if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
1113                 rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
1114
1115         /*
1116          * Initialize ring parameters.
1117          * cw_min: 2^5 = 32.
1118          * cw_max: 2^10 = 1024.
1119          */
1120         ring_for_each(rt2x00dev, ring) {
1121                 ring->rt2x00dev = rt2x00dev;
1122                 ring->tx_params.aifs = 2;
1123                 ring->tx_params.cw_min = 5;
1124                 ring->tx_params.cw_max = 10;
1125         }
1126
1127         return 0;
1128 }
1129
1130 static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
1131 {
1132         kfree(rt2x00dev->rx);
1133         rt2x00dev->rx = NULL;
1134         rt2x00dev->tx = NULL;
1135         rt2x00dev->bcn = NULL;
1136 }
1137
1138 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1139 {
1140         int retval = -ENOMEM;
1141
1142         /*
1143          * Let the driver probe the device to detect the capabilities.
1144          */
1145         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1146         if (retval) {
1147                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1148                 goto exit;
1149         }
1150
1151         /*
1152          * Initialize configuration work.
1153          */
1154         INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
1155         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1156         INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled);
1157         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1158
1159         /*
1160          * Reset current working type.
1161          */
1162         rt2x00dev->interface.type = INVALID_INTERFACE;
1163
1164         /*
1165          * Allocate ring array.
1166          */
1167         retval = rt2x00lib_alloc_rings(rt2x00dev);
1168         if (retval)
1169                 goto exit;
1170
1171         /*
1172          * Initialize ieee80211 structure.
1173          */
1174         retval = rt2x00lib_probe_hw(rt2x00dev);
1175         if (retval) {
1176                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1177                 goto exit;
1178         }
1179
1180         /*
1181          * Allocatie rfkill.
1182          */
1183         retval = rt2x00rfkill_allocate(rt2x00dev);
1184         if (retval)
1185                 goto exit;
1186
1187         /*
1188          * Open the debugfs entry.
1189          */
1190         rt2x00debug_register(rt2x00dev);
1191
1192         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1193
1194         return 0;
1195
1196 exit:
1197         rt2x00lib_remove_dev(rt2x00dev);
1198
1199         return retval;
1200 }
1201 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1202
1203 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1204 {
1205         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1206
1207         /*
1208          * Disable radio.
1209          */
1210         rt2x00lib_disable_radio(rt2x00dev);
1211
1212         /*
1213          * Uninitialize device.
1214          */
1215         rt2x00lib_uninitialize(rt2x00dev);
1216
1217         /*
1218          * Close debugfs entry.
1219          */
1220         rt2x00debug_deregister(rt2x00dev);
1221
1222         /*
1223          * Free rfkill
1224          */
1225         rt2x00rfkill_free(rt2x00dev);
1226
1227         /*
1228          * Free ieee80211_hw memory.
1229          */
1230         rt2x00lib_remove_hw(rt2x00dev);
1231
1232         /*
1233          * Free firmware image.
1234          */
1235         rt2x00lib_free_firmware(rt2x00dev);
1236
1237         /*
1238          * Free ring structures.
1239          */
1240         rt2x00lib_free_rings(rt2x00dev);
1241 }
1242 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1243
1244 /*
1245  * Device state handlers
1246  */
1247 #ifdef CONFIG_PM
1248 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1249 {
1250         int retval;
1251
1252         NOTICE(rt2x00dev, "Going to sleep.\n");
1253         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1254
1255         /*
1256          * Only continue if mac80211 has open interfaces.
1257          */
1258         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1259                 goto exit;
1260         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1261
1262         /*
1263          * Disable radio and unitialize all items
1264          * that must be recreated on resume.
1265          */
1266         rt2x00mac_stop(rt2x00dev->hw);
1267         rt2x00lib_uninitialize(rt2x00dev);
1268         rt2x00debug_deregister(rt2x00dev);
1269
1270 exit:
1271         /*
1272          * Set device mode to sleep for power management.
1273          */
1274         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1275         if (retval)
1276                 return retval;
1277
1278         return 0;
1279 }
1280 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1281
1282 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1283 {
1284         struct interface *intf = &rt2x00dev->interface;
1285         int retval;
1286
1287         NOTICE(rt2x00dev, "Waking up.\n");
1288         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1289
1290         /*
1291          * Open the debugfs entry.
1292          */
1293         rt2x00debug_register(rt2x00dev);
1294
1295         /*
1296          * Only continue if mac80211 had open interfaces.
1297          */
1298         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1299                 return 0;
1300
1301         /*
1302          * Reinitialize device and all active interfaces.
1303          */
1304         retval = rt2x00mac_start(rt2x00dev->hw);
1305         if (retval)
1306                 goto exit;
1307
1308         /*
1309          * Reconfigure device.
1310          */
1311         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1312         if (!rt2x00dev->hw->conf.radio_enabled)
1313                 rt2x00lib_disable_radio(rt2x00dev);
1314
1315         rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
1316         rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
1317         rt2x00lib_config_type(rt2x00dev, intf->type);
1318
1319         /*
1320          * It is possible that during that mac80211 has attempted
1321          * to send frames while we were suspending or resuming.
1322          * In that case we have disabled the TX queue and should
1323          * now enable it again
1324          */
1325         ieee80211_start_queues(rt2x00dev->hw);
1326
1327         /*
1328          * When in Master or Ad-hoc mode,
1329          * restart Beacon transmitting by faking a beacondone event.
1330          */
1331         if (intf->type == IEEE80211_IF_TYPE_AP ||
1332             intf->type == IEEE80211_IF_TYPE_IBSS)
1333                 rt2x00lib_beacondone(rt2x00dev);
1334
1335         return 0;
1336
1337 exit:
1338         rt2x00lib_disable_radio(rt2x00dev);
1339         rt2x00lib_uninitialize(rt2x00dev);
1340         rt2x00debug_deregister(rt2x00dev);
1341
1342         return retval;
1343 }
1344 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1345 #endif /* CONFIG_PM */
1346
1347 /*
1348  * rt2x00lib module information.
1349  */
1350 MODULE_AUTHOR(DRV_PROJECT);
1351 MODULE_VERSION(DRV_VERSION);
1352 MODULE_DESCRIPTION("rt2x00 library");
1353 MODULE_LICENSE("GPL");