SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31
  32 /*
  33  * Link tuning handlers
  34  */
  35 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  36 {
  37         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  38                 return;
  39
  40         /*
  41          * Reset link information.
  42          * Both the currently active vgc level as well as
  43          * the link tuner counter should be reset. Resetting
  44          * the counter is important for devices where the
  45          * device should only perform link tuning during the
  46          * first minute after being enabled.
  47          */
  48         rt2x00dev->link.count = 0;
  49         rt2x00dev->link.vgc_level = 0;
  50
  51         /*
  52          * Reset the link tuner.
  53          */
  54         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  55 }
  56
  57 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  58 {
  59         /*
  60          * Clear all (possibly) pre-existing quality statistics.
  61          */
  62         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  63
  64         /*
  65          * The RX and TX percentage should start at 50%
  66          * this will assure we will get at least get some
  67          * decent value when the link tuner starts.
  68          * The value will be dropped and overwritten with
  69          * the correct (measured )value anyway during the
  70          * first run of the link tuner.
  71          */
  72         rt2x00dev->link.qual.rx_percentage = 50;
  73         rt2x00dev->link.qual.tx_percentage = 50;
  74
  75         rt2x00lib_reset_link_tuner(rt2x00dev);
  76
  77         queue_delayed_work(rt2x00dev->hw->workqueue,
  78                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  79 }
  80
  81 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  82 {
  83         cancel_delayed_work_sync(&rt2x00dev->link.work);
  84 }
  85
  86 /*
  87  * Radio control handlers.
  88  */
  89 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  90 {
  91         int status;
  92
  93         /*
  94          * Don't enable the radio twice.
  95          * And check if the hardware button has been disabled.
  96          */
  97         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
  98             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
  99                 return 0;
 100
 101         /*
 102          * Initialize all data queues.
 103          */
 104         rt2x00queue_init_rx(rt2x00dev);
 105         rt2x00queue_init_tx(rt2x00dev);
 106
 107         /*
 108          * Enable radio.
 109          */
 110         status =
 111             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
 112         if (status)
 113                 return status;
 114
 115         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
 116
 117         rt2x00leds_led_radio(rt2x00dev, true);
 118         rt2x00led_led_activity(rt2x00dev, true);
 119
 120         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 121
 122         /*
 123          * Enable RX.
 124          */
 125         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 126
 127         /*
 128          * Start the TX queues.
 129          */
 130         ieee80211_wake_queues(rt2x00dev->hw);
 131
 132         return 0;
 133 }
 134
 135 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 136 {
 137         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 138                 return;
 139
 140         /*
 141          * Stop the TX queues.
 142          */
 143         ieee80211_stop_queues(rt2x00dev->hw);
 144
 145         /*
 146          * Disable RX.
 147          */
 148         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 149
 150         /*
 151          * Disable radio.
 152          */
 153         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 154         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
 155         rt2x00led_led_activity(rt2x00dev, false);
 156         rt2x00leds_led_radio(rt2x00dev, false);
 157 }
 158
 159 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 160 {
 161         /*
 162          * When we are disabling the RX, we should also stop the link tuner.
 163          */
 164         if (state == STATE_RADIO_RX_OFF)
 165                 rt2x00lib_stop_link_tuner(rt2x00dev);
 166
 167         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 168
 169         /*
 170          * When we are enabling the RX, we should also start the link tuner.
 171          */
 172         if (state == STATE_RADIO_RX_ON &&
 173             (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
 174                 rt2x00lib_start_link_tuner(rt2x00dev);
 175 }
 176
 177 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 178 {
 179         enum antenna rx = rt2x00dev->link.ant.active.rx;
 180         enum antenna tx = rt2x00dev->link.ant.active.tx;
 181         int sample_a =
 182             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 183         int sample_b =
 184             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 185
 186         /*
 187          * We are done sampling. Now we should evaluate the results.
 188          */
 189         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 190
 191         /*
 192          * During the last period we have sampled the RSSI
 193          * from both antenna's. It now is time to determine
 194          * which antenna demonstrated the best performance.
 195          * When we are already on the antenna with the best
 196          * performance, then there really is nothing for us
 197          * left to do.
 198          */
 199         if (sample_a == sample_b)
 200                 return;
 201
 202         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 203                 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 204
 205         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 206                 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 207
 208         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 209 }
 210
 211 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 212 {
 213         enum antenna rx = rt2x00dev->link.ant.active.rx;
 214         enum antenna tx = rt2x00dev->link.ant.active.tx;
 215         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 216         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 217
 218         /*
 219          * Legacy driver indicates that we should swap antenna's
 220          * when the difference in RSSI is greater that 5. This
 221          * also should be done when the RSSI was actually better
 222          * then the previous sample.
 223          * When the difference exceeds the threshold we should
 224          * sample the rssi from the other antenna to make a valid
 225          * comparison between the 2 antennas.
 226          */
 227         if (abs(rssi_curr - rssi_old) < 5)
 228                 return;
 229
 230         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 231
 232         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 233                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 234
 235         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 236                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 237
 238         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 239 }
 240
 241 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 242 {
 243         /*
 244          * Determine if software diversity is enabled for
 245          * either the TX or RX antenna (or both).
 246          * Always perform this check since within the link
 247          * tuner interval the configuration might have changed.
 248          */
 249         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 250         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 251
 252         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 253             rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
 254                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 255         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 256             rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
 257                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 258
 259         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 260             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 261                 rt2x00dev->link.ant.flags = 0;
 262                 return;
 263         }
 264
 265         /*
 266          * If we have only sampled the data over the last period
 267          * we should now harvest the data. Otherwise just evaluate
 268          * the data. The latter should only be performed once
 269          * every 2 seconds.
 270          */
 271         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 272                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 273         else if (rt2x00dev->link.count & 1)
 274                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 275 }
 276
 277 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 278 {
 279         int avg_rssi = rssi;
 280
 281         /*
 282          * Update global RSSI
 283          */
 284         if (link->qual.avg_rssi)
 285                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 286         link->qual.avg_rssi = avg_rssi;
 287
 288         /*
 289          * Update antenna RSSI
 290          */
 291         if (link->ant.rssi_ant)
 292                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 293         link->ant.rssi_ant = rssi;
 294 }
 295
 296 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 297 {
 298         if (qual->rx_failed || qual->rx_success)
 299                 qual->rx_percentage =
 300                     (qual->rx_success * 100) /
 301                     (qual->rx_failed + qual->rx_success);
 302         else
 303                 qual->rx_percentage = 50;
 304
 305         if (qual->tx_failed || qual->tx_success)
 306                 qual->tx_percentage =
 307                     (qual->tx_success * 100) /
 308                     (qual->tx_failed + qual->tx_success);
 309         else
 310                 qual->tx_percentage = 50;
 311
 312         qual->rx_success = 0;
 313         qual->rx_failed = 0;
 314         qual->tx_success = 0;
 315         qual->tx_failed = 0;
 316 }
 317
 318 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 319                                            int rssi)
 320 {
 321         int rssi_percentage = 0;
 322         int signal;
 323
 324         /*
 325          * We need a positive value for the RSSI.
 326          */
 327         if (rssi < 0)
 328                 rssi += rt2x00dev->rssi_offset;
 329
 330         /*
 331          * Calculate the different percentages,
 332          * which will be used for the signal.
 333          */
 334         if (rt2x00dev->rssi_offset)
 335                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 336
 337         /*
 338          * Add the individual percentages and use the WEIGHT
 339          * defines to calculate the current link signal.
 340          */
 341         signal = ((WEIGHT_RSSI * rssi_percentage) +
 342                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 343                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 344
 345         return (signal > 100) ? 100 : signal;
 346 }
 347
 348 static void rt2x00lib_link_tuner(struct work_struct *work)
 349 {
 350         struct rt2x00_dev *rt2x00dev =
 351             container_of(work, struct rt2x00_dev, link.work.work);
 352
 353         /*
 354          * When the radio is shutting down we should
 355          * immediately cease all link tuning.
 356          */
 357         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 358                 return;
 359
 360         /*
 361          * Update statistics.
 362          */
 363         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 364         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 365             rt2x00dev->link.qual.rx_failed;
 366
 367         /*
 368          * Only perform the link tuning when Link tuning
 369          * has been enabled (This could have been disabled from the EEPROM).
 370          */
 371         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 372                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 373
 374         /*
 375          * Precalculate a portion of the link signal which is
 376          * in based on the tx/rx success/failure counters.
 377          */
 378         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 379
 380         /*
 381          * Send a signal to the led to update the led signal strength.
 382          */
 383         rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
 384
 385         /*
 386          * Evaluate antenna setup, make this the last step since this could
 387          * possibly reset some statistics.
 388          */
 389         rt2x00lib_evaluate_antenna(rt2x00dev);
 390
 391         /*
 392          * Increase tuner counter, and reschedule the next link tuner run.
 393          */
 394         rt2x00dev->link.count++;
 395         queue_delayed_work(rt2x00dev->hw->workqueue,
 396                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
 397 }
 398
 399 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 400 {
 401         struct rt2x00_dev *rt2x00dev =
 402             container_of(work, struct rt2x00_dev, filter_work);
 403
 404         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 405 }
 406
 407 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 408                                           struct ieee80211_vif *vif)
 409 {
 410         struct rt2x00_dev *rt2x00dev = data;
 411         struct rt2x00_intf *intf = vif_to_intf(vif);
 412         struct sk_buff *skb;
 413         struct ieee80211_bss_conf conf;
 414         int delayed_flags;
 415
 416         /*
 417          * Copy all data we need during this action under the protection
 418          * of a spinlock. Otherwise race conditions might occur which results
 419          * into an invalid configuration.
 420          */
 421         spin_lock(&intf->lock);
 422
 423         memcpy(&conf, &intf->conf, sizeof(conf));
 424         delayed_flags = intf->delayed_flags;
 425         intf->delayed_flags = 0;
 426
 427         spin_unlock(&intf->lock);
 428
 429         /*
 430          * It is possible the radio was disabled while the work had been
 431          * scheduled. If that happens we should return here immediately,
 432          * note that in the spinlock protected area above the delayed_flags
 433          * have been cleared correctly.
 434          */
 435         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 436                 return;
 437
 438         if (delayed_flags & DELAYED_UPDATE_BEACON) {
 439                 skb = ieee80211_beacon_get(rt2x00dev->hw, vif);
 440                 if (skb &&
 441                     rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb))
 442                         dev_kfree_skb(skb);
 443         }
 444
 445         if (delayed_flags & DELAYED_CONFIG_ERP)
 446                 rt2x00lib_config_erp(rt2x00dev, intf, &conf);
 447
 448         if (delayed_flags & DELAYED_LED_ASSOC)
 449                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 450 }
 451
 452 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 453 {
 454         struct rt2x00_dev *rt2x00dev =
 455             container_of(work, struct rt2x00_dev, intf_work);
 456
 457         /*
 458          * Iterate over each interface and perform the
 459          * requested configurations.
 460          */
 461         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 462                                             rt2x00lib_intf_scheduled_iter,
 463                                             rt2x00dev);
 464 }
 465
 466 /*
 467  * Interrupt context handlers.
 468  */
 469 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 470                                       struct ieee80211_vif *vif)
 471 {
 472         struct rt2x00_dev *rt2x00dev = data;
 473         struct rt2x00_intf *intf = vif_to_intf(vif);
 474
 475         if (vif->type != IEEE80211_IF_TYPE_AP &&
 476             vif->type != IEEE80211_IF_TYPE_IBSS)
 477                 return;
 478
 479         /*
 480          * Clean up the beacon skb.
 481          */
 482         rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
 483         intf->beacon->skb = NULL;
 484
 485         spin_lock(&intf->lock);
 486         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 487         spin_unlock(&intf->lock);
 488 }
 489
 490 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 491 {
 492         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 493                 return;
 494
 495         ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
 496                                                    rt2x00lib_beacondone_iter,
 497                                                    rt2x00dev);
 498
 499         schedule_work(&rt2x00dev->intf_work);
 500 }
 501 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 502
 503 void rt2x00lib_txdone(struct queue_entry *entry,
 504                       struct txdone_entry_desc *txdesc)
 505 {
 506         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 507         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
 508         enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
 509
 510         /*
 511          * Unmap the skb.
 512          */
 513         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 514
 515         /*
 516          * Send frame to debugfs immediately, after this call is completed
 517          * we are going to overwrite the skb->cb array.
 518          */
 519         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
 520
 521         /*
 522          * Update TX statistics.
 523          */
 524         rt2x00dev->link.qual.tx_success +=
 525             test_bit(TXDONE_SUCCESS, &txdesc->flags);
 526         rt2x00dev->link.qual.tx_failed +=
 527             test_bit(TXDONE_FAILURE, &txdesc->flags);
 528
 529         /*
 530          * Initialize TX status
 531          */
 532         memset(&tx_info->status, 0, sizeof(tx_info->status));
 533         tx_info->status.ack_signal = 0;
 534         tx_info->status.excessive_retries =
 535             test_bit(TXDONE_EXCESSIVE_RETRY, &txdesc->flags);
 536         tx_info->status.retry_count = txdesc->retry;
 537
 538         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 539                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
 540                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
 541                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 542                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 543         }
 544
 545         if (tx_info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 546                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
 547                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 548                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 549                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 550         }
 551
 552         /*
 553          * Only send the status report to mac80211 when TX status was
 554          * requested by it. If this was a extra frame coming through
 555          * a mac80211 library call (RTS/CTS) then we should not send the
 556          * status report back.
 557          */
 558         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 559                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
 560         else
 561                 dev_kfree_skb_irq(entry->skb);
 562
 563         /*
 564          * Make this entry available for reuse.
 565          */
 566         entry->skb = NULL;
 567         entry->flags = 0;
 568
 569         rt2x00dev->ops->lib->init_txentry(rt2x00dev, entry);
 570
 571         __clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 572         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 573
 574         /*
 575          * If the data queue was below the threshold before the txdone
 576          * handler we must make sure the packet queue in the mac80211 stack
 577          * is reenabled when the txdone handler has finished.
 578          */
 579         if (!rt2x00queue_threshold(entry->queue))
 580                 ieee80211_wake_queue(rt2x00dev->hw, qid);
 581 }
 582 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 583
 584 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 585                       struct queue_entry *entry)
 586 {
 587         struct rxdone_entry_desc rxdesc;
 588         struct sk_buff *skb;
 589         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 590         struct ieee80211_supported_band *sband;
 591         struct ieee80211_hdr *hdr;
 592         const struct rt2x00_rate *rate;
 593         unsigned int header_size;
 594         unsigned int align;
 595         unsigned int i;
 596         int idx = -1;
 597
 598         /*
 599          * Allocate a new sk_buffer. If no new buffer available, drop the
 600          * received frame and reuse the existing buffer.
 601          */
 602         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
 603         if (!skb)
 604                 return;
 605
 606         /*
 607          * Unmap the skb.
 608          */
 609         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 610
 611         /*
 612          * Extract the RXD details.
 613          */
 614         memset(&rxdesc, 0, sizeof(rxdesc));
 615         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
 616
 617         /*
 618          * The data behind the ieee80211 header must be
 619          * aligned on a 4 byte boundary.
 620          */
 621         header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
 622         align = ((unsigned long)(entry->skb->data + header_size)) & 3;
 623
 624         if (align) {
 625                 skb_push(entry->skb, align);
 626                 /* Move entire frame in 1 command */
 627                 memmove(entry->skb->data, entry->skb->data + align,
 628                         rxdesc.size);
 629         }
 630
 631         /* Update data pointers, trim buffer to correct size */
 632         skb_trim(entry->skb, rxdesc.size);
 633
 634         /*
 635          * Update RX statistics.
 636          */
 637         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 638         for (i = 0; i < sband->n_bitrates; i++) {
 639                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 640
 641                 if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
 642                      (rate->plcp == rxdesc.signal)) ||
 643                     (!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
 644                       (rate->bitrate == rxdesc.signal))) {
 645                         idx = i;
 646                         break;
 647                 }
 648         }
 649
 650         if (idx < 0) {
 651                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 652                         "signal=0x%.2x, plcp=%d.\n", rxdesc.signal,
 653                         !!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP));
 654                 idx = 0;
 655         }
 656
 657         /*
 658          * Only update link status if this is a beacon frame carrying our bssid.
 659          */
 660         hdr = (struct ieee80211_hdr *)entry->skb->data;
 661         if (ieee80211_is_beacon(hdr->frame_control) &&
 662             (rxdesc.dev_flags & RXDONE_MY_BSS))
 663                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc.rssi);
 664
 665         rt2x00dev->link.qual.rx_success++;
 666
 667         rx_status->mactime = rxdesc.timestamp;
 668         rx_status->rate_idx = idx;
 669         rx_status->qual =
 670             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc.rssi);
 671         rx_status->signal = rxdesc.rssi;
 672         rx_status->flag = rxdesc.flags;
 673         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 674
 675         /*
 676          * Send frame to mac80211 & debugfs.
 677          * mac80211 will clean up the skb structure.
 678          */
 679         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 680         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 681
 682         /*
 683          * Replace the skb with the freshly allocated one.
 684          */
 685         entry->skb = skb;
 686         entry->flags = 0;
 687
 688         rt2x00dev->ops->lib->init_rxentry(rt2x00dev, entry);
 689
 690         rt2x00queue_index_inc(entry->queue, Q_INDEX);
 691 }
 692 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 693
 694 /*
 695  * Driver initialization handlers.
 696  */
 697 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 698         {
 699                 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
 700                 .bitrate = 10,
 701                 .ratemask = BIT(0),
 702                 .plcp = 0x00,
 703         },
 704         {
 705                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 706                 .bitrate = 20,
 707                 .ratemask = BIT(1),
 708                 .plcp = 0x01,
 709         },
 710         {
 711                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 712                 .bitrate = 55,
 713                 .ratemask = BIT(2),
 714                 .plcp = 0x02,
 715         },
 716         {
 717                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 718                 .bitrate = 110,
 719                 .ratemask = BIT(3),
 720                 .plcp = 0x03,
 721         },
 722         {
 723                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 724                 .bitrate = 60,
 725                 .ratemask = BIT(4),
 726                 .plcp = 0x0b,
 727         },
 728         {
 729                 .flags = DEV_RATE_OFDM,
 730                 .bitrate = 90,
 731                 .ratemask = BIT(5),
 732                 .plcp = 0x0f,
 733         },
 734         {
 735                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 736                 .bitrate = 120,
 737                 .ratemask = BIT(6),
 738                 .plcp = 0x0a,
 739         },
 740         {
 741                 .flags = DEV_RATE_OFDM,
 742                 .bitrate = 180,
 743                 .ratemask = BIT(7),
 744                 .plcp = 0x0e,
 745         },
 746         {
 747                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 748                 .bitrate = 240,
 749                 .ratemask = BIT(8),
 750                 .plcp = 0x09,
 751         },
 752         {
 753                 .flags = DEV_RATE_OFDM,
 754                 .bitrate = 360,
 755                 .ratemask = BIT(9),
 756                 .plcp = 0x0d,
 757         },
 758         {
 759                 .flags = DEV_RATE_OFDM,
 760                 .bitrate = 480,
 761                 .ratemask = BIT(10),
 762                 .plcp = 0x08,
 763         },
 764         {
 765                 .flags = DEV_RATE_OFDM,
 766                 .bitrate = 540,
 767                 .ratemask = BIT(11),
 768                 .plcp = 0x0c,
 769         },
 770 };
 771
 772 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 773                               const int channel, const int tx_power,
 774                               const int value)
 775 {
 776         entry->center_freq = ieee80211_channel_to_frequency(channel);
 777         entry->hw_value = value;
 778         entry->max_power = tx_power;
 779         entry->max_antenna_gain = 0xff;
 780 }
 781
 782 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 783                            const u16 index, const struct rt2x00_rate *rate)
 784 {
 785         entry->flags = 0;
 786         entry->bitrate = rate->bitrate;
 787         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 788         entry->hw_value_short = entry->hw_value;
 789
 790         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 791                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 792                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 793         }
 794 }
 795
 796 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 797                                     struct hw_mode_spec *spec)
 798 {
 799         struct ieee80211_hw *hw = rt2x00dev->hw;
 800         struct ieee80211_channel *channels;
 801         struct ieee80211_rate *rates;
 802         unsigned int num_rates;
 803         unsigned int i;
 804         unsigned char tx_power;
 805
 806         num_rates = 0;
 807         if (spec->supported_rates & SUPPORT_RATE_CCK)
 808                 num_rates += 4;
 809         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 810                 num_rates += 8;
 811
 812         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 813         if (!channels)
 814                 return -ENOMEM;
 815
 816         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 817         if (!rates)
 818                 goto exit_free_channels;
 819
 820         /*
 821          * Initialize Rate list.
 822          */
 823         for (i = 0; i < num_rates; i++)
 824                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 825
 826         /*
 827          * Initialize Channel list.
 828          */
 829         for (i = 0; i < spec->num_channels; i++) {
 830                 if (spec->channels[i].channel <= 14) {
 831                         if (spec->tx_power_bg)
 832                                 tx_power = spec->tx_power_bg[i];
 833                         else
 834                                 tx_power = spec->tx_power_default;
 835                 } else {
 836                         if (spec->tx_power_a)
 837                                 tx_power = spec->tx_power_a[i];
 838                         else
 839                                 tx_power = spec->tx_power_default;
 840                 }
 841
 842                 rt2x00lib_channel(&channels[i],
 843                                   spec->channels[i].channel, tx_power, i);
 844         }
 845
 846         /*
 847          * Intitialize 802.11b, 802.11g
 848          * Rates: CCK, OFDM.
 849          * Channels: 2.4 GHz
 850          */
 851         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 852                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 853                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 854                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 855                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 856                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 857                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 858         }
 859
 860         /*
 861          * Intitialize 802.11a
 862          * Rates: OFDM.
 863          * Channels: OFDM, UNII, HiperLAN2.
 864          */
 865         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 866                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 867                     spec->num_channels - 14;
 868                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 869                     num_rates - 4;
 870                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 871                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 872                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 873                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 874         }
 875
 876         return 0;
 877
 878  exit_free_channels:
 879         kfree(channels);
 880         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 881         return -ENOMEM;
 882 }
 883
 884 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 885 {
 886         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 887                 ieee80211_unregister_hw(rt2x00dev->hw);
 888
 889         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 890                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 891                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 892                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 893                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 894         }
 895 }
 896
 897 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 898 {
 899         struct hw_mode_spec *spec = &rt2x00dev->spec;
 900         int status;
 901
 902         /*
 903          * Initialize HW modes.
 904          */
 905         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 906         if (status)
 907                 return status;
 908
 909         /*
 910          * Initialize HW fields.
 911          */
 912         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
 913
 914         /*
 915          * Register HW.
 916          */
 917         status = ieee80211_register_hw(rt2x00dev->hw);
 918         if (status) {
 919                 rt2x00lib_remove_hw(rt2x00dev);
 920                 return status;
 921         }
 922
 923         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 924
 925         return 0;
 926 }
 927
 928 /*
 929  * Initialization/uninitialization handlers.
 930  */
 931 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 932 {
 933         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 934                 return;
 935
 936         /*
 937          * Unregister extra components.
 938          */
 939         rt2x00rfkill_unregister(rt2x00dev);
 940
 941         /*
 942          * Allow the HW to uninitialize.
 943          */
 944         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 945
 946         /*
 947          * Free allocated queue entries.
 948          */
 949         rt2x00queue_uninitialize(rt2x00dev);
 950 }
 951
 952 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 953 {
 954         int status;
 955
 956         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 957                 return 0;
 958
 959         /*
 960          * Allocate all queue entries.
 961          */
 962         status = rt2x00queue_initialize(rt2x00dev);
 963         if (status)
 964                 return status;
 965
 966         /*
 967          * Initialize the device.
 968          */
 969         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 970         if (status) {
 971                 rt2x00queue_uninitialize(rt2x00dev);
 972                 return status;
 973         }
 974
 975         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
 976
 977         /*
 978          * Register the extra components.
 979          */
 980         rt2x00rfkill_register(rt2x00dev);
 981
 982         return 0;
 983 }
 984
 985 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
 986 {
 987         int retval;
 988
 989         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
 990                 return 0;
 991
 992         /*
 993          * If this is the first interface which is added,
 994          * we should load the firmware now.
 995          */
 996         retval = rt2x00lib_load_firmware(rt2x00dev);
 997         if (retval)
 998                 return retval;
 999
1000         /*
1001          * Initialize the device.
1002          */
1003         retval = rt2x00lib_initialize(rt2x00dev);
1004         if (retval)
1005                 return retval;
1006
1007         /*
1008          * Enable radio.
1009          */
1010         retval = rt2x00lib_enable_radio(rt2x00dev);
1011         if (retval) {
1012                 rt2x00lib_uninitialize(rt2x00dev);
1013                 return retval;
1014         }
1015
1016         rt2x00dev->intf_ap_count = 0;
1017         rt2x00dev->intf_sta_count = 0;
1018         rt2x00dev->intf_associated = 0;
1019
1020         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1021
1022         return 0;
1023 }
1024
1025 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1026 {
1027         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1028                 return;
1029
1030         /*
1031          * Perhaps we can add something smarter here,
1032          * but for now just disabling the radio should do.
1033          */
1034         rt2x00lib_disable_radio(rt2x00dev);
1035
1036         rt2x00dev->intf_ap_count = 0;
1037         rt2x00dev->intf_sta_count = 0;
1038         rt2x00dev->intf_associated = 0;
1039
1040         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1041 }
1042
1043 /*
1044  * driver allocation handlers.
1045  */
1046 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1047 {
1048         int retval = -ENOMEM;
1049
1050         /*
1051          * Make room for rt2x00_intf inside the per-interface
1052          * structure ieee80211_vif.
1053          */
1054         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1055
1056         /*
1057          * Let the driver probe the device to detect the capabilities.
1058          */
1059         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1060         if (retval) {
1061                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1062                 goto exit;
1063         }
1064
1065         /*
1066          * Initialize configuration work.
1067          */
1068         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1069         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1070         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1071
1072         /*
1073          * Allocate queue array.
1074          */
1075         retval = rt2x00queue_allocate(rt2x00dev);
1076         if (retval)
1077                 goto exit;
1078
1079         /*
1080          * Initialize ieee80211 structure.
1081          */
1082         retval = rt2x00lib_probe_hw(rt2x00dev);
1083         if (retval) {
1084                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1085                 goto exit;
1086         }
1087
1088         /*
1089          * Register extra components.
1090          */
1091         rt2x00leds_register(rt2x00dev);
1092         rt2x00rfkill_allocate(rt2x00dev);
1093         rt2x00debug_register(rt2x00dev);
1094
1095         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1096
1097         return 0;
1098
1099 exit:
1100         rt2x00lib_remove_dev(rt2x00dev);
1101
1102         return retval;
1103 }
1104 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1105
1106 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1107 {
1108         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1109
1110         /*
1111          * Disable radio.
1112          */
1113         rt2x00lib_disable_radio(rt2x00dev);
1114
1115         /*
1116          * Uninitialize device.
1117          */
1118         rt2x00lib_uninitialize(rt2x00dev);
1119
1120         /*
1121          * Free extra components
1122          */
1123         rt2x00debug_deregister(rt2x00dev);
1124         rt2x00rfkill_free(rt2x00dev);
1125         rt2x00leds_unregister(rt2x00dev);
1126
1127         /*
1128          * Free ieee80211_hw memory.
1129          */
1130         rt2x00lib_remove_hw(rt2x00dev);
1131
1132         /*
1133          * Free firmware image.
1134          */
1135         rt2x00lib_free_firmware(rt2x00dev);
1136
1137         /*
1138          * Free queue structures.
1139          */
1140         rt2x00queue_free(rt2x00dev);
1141 }
1142 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1143
1144 /*
1145  * Device state handlers
1146  */
1147 #ifdef CONFIG_PM
1148 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1149 {
1150         int retval;
1151
1152         NOTICE(rt2x00dev, "Going to sleep.\n");
1153         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1154
1155         /*
1156          * Only continue if mac80211 has open interfaces.
1157          */
1158         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1159                 goto exit;
1160         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1161
1162         /*
1163          * Disable radio.
1164          */
1165         rt2x00lib_stop(rt2x00dev);
1166         rt2x00lib_uninitialize(rt2x00dev);
1167
1168         /*
1169          * Suspend/disable extra components.
1170          */
1171         rt2x00leds_suspend(rt2x00dev);
1172         rt2x00debug_deregister(rt2x00dev);
1173
1174 exit:
1175         /*
1176          * Set device mode to sleep for power management,
1177          * on some hardware this call seems to consistently fail.
1178          * From the specifications it is hard to tell why it fails,
1179          * and if this is a "bad thing".
1180          * Overall it is safe to just ignore the failure and
1181          * continue suspending. The only downside is that the
1182          * device will not be in optimal power save mode, but with
1183          * the radio and the other components already disabled the
1184          * device is as good as disabled.
1185          */
1186         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1187         if (retval)
1188                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1189                         "continue suspending.\n");
1190
1191         return 0;
1192 }
1193 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1194
1195 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1196                                   struct ieee80211_vif *vif)
1197 {
1198         struct rt2x00_dev *rt2x00dev = data;
1199         struct rt2x00_intf *intf = vif_to_intf(vif);
1200
1201         spin_lock(&intf->lock);
1202
1203         rt2x00lib_config_intf(rt2x00dev, intf,
1204                               vif->type, intf->mac, intf->bssid);
1205
1206
1207         /*
1208          * Master or Ad-hoc mode require a new beacon update.
1209          */
1210         if (vif->type == IEEE80211_IF_TYPE_AP ||
1211             vif->type == IEEE80211_IF_TYPE_IBSS)
1212                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1213
1214         spin_unlock(&intf->lock);
1215 }
1216
1217 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1218 {
1219         int retval;
1220
1221         NOTICE(rt2x00dev, "Waking up.\n");
1222
1223         /*
1224          * Restore/enable extra components.
1225          */
1226         rt2x00debug_register(rt2x00dev);
1227         rt2x00leds_resume(rt2x00dev);
1228
1229         /*
1230          * Only continue if mac80211 had open interfaces.
1231          */
1232         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1233                 return 0;
1234
1235         /*
1236          * Reinitialize device and all active interfaces.
1237          */
1238         retval = rt2x00lib_start(rt2x00dev);
1239         if (retval)
1240                 goto exit;
1241
1242         /*
1243          * Reconfigure device.
1244          */
1245         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1246         if (!rt2x00dev->hw->conf.radio_enabled)
1247                 rt2x00lib_disable_radio(rt2x00dev);
1248
1249         /*
1250          * Iterator over each active interface to
1251          * reconfigure the hardware.
1252          */
1253         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1254                                             rt2x00lib_resume_intf, rt2x00dev);
1255
1256         /*
1257          * We are ready again to receive requests from mac80211.
1258          */
1259         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1260
1261         /*
1262          * It is possible that during that mac80211 has attempted
1263          * to send frames while we were suspending or resuming.
1264          * In that case we have disabled the TX queue and should
1265          * now enable it again
1266          */
1267         ieee80211_wake_queues(rt2x00dev->hw);
1268
1269         /*
1270          * During interface iteration we might have changed the
1271          * delayed_flags, time to handles the event by calling
1272          * the work handler directly.
1273          */
1274         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1275
1276         return 0;
1277
1278 exit:
1279         rt2x00lib_disable_radio(rt2x00dev);
1280         rt2x00lib_uninitialize(rt2x00dev);
1281         rt2x00debug_deregister(rt2x00dev);
1282
1283         return retval;
1284 }
1285 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1286 #endif /* CONFIG_PM */
1287
1288 /*
1289  * rt2x00lib module information.
1290  */
1291 MODULE_AUTHOR(DRV_PROJECT);
1292 MODULE_VERSION(DRV_VERSION);
1293 MODULE_DESCRIPTION("rt2x00 library");
1294 MODULE_LICENSE("GPL");