drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31 #include "rt2x00dump.h"
  32
  33 /*
  34  * Link tuning handlers
  35  */
  36 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  37 {
  38         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  39                 return;
  40
  41         /*
  42          * Reset link information.
  43          * Both the currently active vgc level as well as
  44          * the link tuner counter should be reset. Resetting
  45          * the counter is important for devices where the
  46          * device should only perform link tuning during the
  47          * first minute after being enabled.
  48          */
  49         rt2x00dev->link.count = 0;
  50         rt2x00dev->link.vgc_level = 0;
  51
  52         /*
  53          * Reset the link tuner.
  54          */
  55         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  56 }
  57
  58 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  59 {
  60         /*
  61          * Clear all (possibly) pre-existing quality statistics.
  62          */
  63         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  64
  65         /*
  66          * The RX and TX percentage should start at 50%
  67          * this will assure we will get at least get some
  68          * decent value when the link tuner starts.
  69          * The value will be dropped and overwritten with
  70          * the correct (measured )value anyway during the
  71          * first run of the link tuner.
  72          */
  73         rt2x00dev->link.qual.rx_percentage = 50;
  74         rt2x00dev->link.qual.tx_percentage = 50;
  75
  76         rt2x00lib_reset_link_tuner(rt2x00dev);
  77
  78         queue_delayed_work(rt2x00dev->hw->workqueue,
  79                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  80 }
  81
  82 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  83 {
  84         cancel_delayed_work_sync(&rt2x00dev->link.work);
  85 }
  86
  87 /*
  88  * Radio control handlers.
  89  */
  90 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  91 {
  92         int status;
  93
  94         /*
  95          * Don't enable the radio twice.
  96          * And check if the hardware button has been disabled.
  97          */
  98         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
  99             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
 100                 return 0;
 101
 102         /*
 103          * Initialize all data queues.
 104          */
 105         rt2x00queue_init_rx(rt2x00dev);
 106         rt2x00queue_init_tx(rt2x00dev);
 107
 108         /*
 109          * Enable radio.
 110          */
 111         status =
 112             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
 113         if (status)
 114                 return status;
 115
 116         rt2x00leds_led_radio(rt2x00dev, true);
 117
 118         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 119
 120         /*
 121          * Enable RX.
 122          */
 123         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 124
 125         /*
 126          * Start the TX queues.
 127          */
 128         ieee80211_start_queues(rt2x00dev->hw);
 129
 130         return 0;
 131 }
 132
 133 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 134 {
 135         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 136                 return;
 137
 138         /*
 139          * Stop all scheduled work.
 140          */
 141         if (work_pending(&rt2x00dev->intf_work))
 142                 cancel_work_sync(&rt2x00dev->intf_work);
 143         if (work_pending(&rt2x00dev->filter_work))
 144                 cancel_work_sync(&rt2x00dev->filter_work);
 145
 146         /*
 147          * Stop the TX queues.
 148          */
 149         ieee80211_stop_queues(rt2x00dev->hw);
 150
 151         /*
 152          * Disable RX.
 153          */
 154         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 155
 156         /*
 157          * Disable radio.
 158          */
 159         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 160         rt2x00leds_led_radio(rt2x00dev, false);
 161 }
 162
 163 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 164 {
 165         /*
 166          * When we are disabling the RX, we should also stop the link tuner.
 167          */
 168         if (state == STATE_RADIO_RX_OFF)
 169                 rt2x00lib_stop_link_tuner(rt2x00dev);
 170
 171         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 172
 173         /*
 174          * When we are enabling the RX, we should also start the link tuner.
 175          */
 176         if (state == STATE_RADIO_RX_ON &&
 177             (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
 178                 rt2x00lib_start_link_tuner(rt2x00dev);
 179 }
 180
 181 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 182 {
 183         enum antenna rx = rt2x00dev->link.ant.active.rx;
 184         enum antenna tx = rt2x00dev->link.ant.active.tx;
 185         int sample_a =
 186             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 187         int sample_b =
 188             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 189
 190         /*
 191          * We are done sampling. Now we should evaluate the results.
 192          */
 193         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 194
 195         /*
 196          * During the last period we have sampled the RSSI
 197          * from both antenna's. It now is time to determine
 198          * which antenna demonstrated the best performance.
 199          * When we are already on the antenna with the best
 200          * performance, then there really is nothing for us
 201          * left to do.
 202          */
 203         if (sample_a == sample_b)
 204                 return;
 205
 206         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 207                 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 208
 209         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 210                 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 211
 212         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 213 }
 214
 215 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 216 {
 217         enum antenna rx = rt2x00dev->link.ant.active.rx;
 218         enum antenna tx = rt2x00dev->link.ant.active.tx;
 219         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 220         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 221
 222         /*
 223          * Legacy driver indicates that we should swap antenna's
 224          * when the difference in RSSI is greater that 5. This
 225          * also should be done when the RSSI was actually better
 226          * then the previous sample.
 227          * When the difference exceeds the threshold we should
 228          * sample the rssi from the other antenna to make a valid
 229          * comparison between the 2 antennas.
 230          */
 231         if (abs(rssi_curr - rssi_old) < 5)
 232                 return;
 233
 234         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 235
 236         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 237                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 238
 239         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 240                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 241
 242         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 243 }
 244
 245 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 246 {
 247         /*
 248          * Determine if software diversity is enabled for
 249          * either the TX or RX antenna (or both).
 250          * Always perform this check since within the link
 251          * tuner interval the configuration might have changed.
 252          */
 253         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 254         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 255
 256         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 257             rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
 258                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 259         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 260             rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
 261                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 262
 263         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 264             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 265                 rt2x00dev->link.ant.flags = 0;
 266                 return;
 267         }
 268
 269         /*
 270          * If we have only sampled the data over the last period
 271          * we should now harvest the data. Otherwise just evaluate
 272          * the data. The latter should only be performed once
 273          * every 2 seconds.
 274          */
 275         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 276                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 277         else if (rt2x00dev->link.count & 1)
 278                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 279 }
 280
 281 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 282 {
 283         int avg_rssi = rssi;
 284
 285         /*
 286          * Update global RSSI
 287          */
 288         if (link->qual.avg_rssi)
 289                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 290         link->qual.avg_rssi = avg_rssi;
 291
 292         /*
 293          * Update antenna RSSI
 294          */
 295         if (link->ant.rssi_ant)
 296                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 297         link->ant.rssi_ant = rssi;
 298 }
 299
 300 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 301 {
 302         if (qual->rx_failed || qual->rx_success)
 303                 qual->rx_percentage =
 304                     (qual->rx_success * 100) /
 305                     (qual->rx_failed + qual->rx_success);
 306         else
 307                 qual->rx_percentage = 50;
 308
 309         if (qual->tx_failed || qual->tx_success)
 310                 qual->tx_percentage =
 311                     (qual->tx_success * 100) /
 312                     (qual->tx_failed + qual->tx_success);
 313         else
 314                 qual->tx_percentage = 50;
 315
 316         qual->rx_success = 0;
 317         qual->rx_failed = 0;
 318         qual->tx_success = 0;
 319         qual->tx_failed = 0;
 320 }
 321
 322 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 323                                            int rssi)
 324 {
 325         int rssi_percentage = 0;
 326         int signal;
 327
 328         /*
 329          * We need a positive value for the RSSI.
 330          */
 331         if (rssi < 0)
 332                 rssi += rt2x00dev->rssi_offset;
 333
 334         /*
 335          * Calculate the different percentages,
 336          * which will be used for the signal.
 337          */
 338         if (rt2x00dev->rssi_offset)
 339                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 340
 341         /*
 342          * Add the individual percentages and use the WEIGHT
 343          * defines to calculate the current link signal.
 344          */
 345         signal = ((WEIGHT_RSSI * rssi_percentage) +
 346                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 347                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 348
 349         return (signal > 100) ? 100 : signal;
 350 }
 351
 352 static void rt2x00lib_link_tuner(struct work_struct *work)
 353 {
 354         struct rt2x00_dev *rt2x00dev =
 355             container_of(work, struct rt2x00_dev, link.work.work);
 356
 357         /*
 358          * When the radio is shutting down we should
 359          * immediately cease all link tuning.
 360          */
 361         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 362                 return;
 363
 364         /*
 365          * Update statistics.
 366          */
 367         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 368         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 369             rt2x00dev->link.qual.rx_failed;
 370
 371         /*
 372          * Only perform the link tuning when Link tuning
 373          * has been enabled (This could have been disabled from the EEPROM).
 374          */
 375         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 376                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 377
 378         /*
 379          * Precalculate a portion of the link signal which is
 380          * in based on the tx/rx success/failure counters.
 381          */
 382         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 383
 384         /*
 385          * Send a signal to the led to update the led signal strength.
 386          */
 387         rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
 388
 389         /*
 390          * Evaluate antenna setup, make this the last step since this could
 391          * possibly reset some statistics.
 392          */
 393         rt2x00lib_evaluate_antenna(rt2x00dev);
 394
 395         /*
 396          * Increase tuner counter, and reschedule the next link tuner run.
 397          */
 398         rt2x00dev->link.count++;
 399         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 400                            LINK_TUNE_INTERVAL);
 401 }
 402
 403 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 404 {
 405         struct rt2x00_dev *rt2x00dev =
 406             container_of(work, struct rt2x00_dev, filter_work);
 407
 408         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 409 }
 410
 411 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 412                                           struct ieee80211_vif *vif)
 413 {
 414         struct rt2x00_dev *rt2x00dev = data;
 415         struct rt2x00_intf *intf = vif_to_intf(vif);
 416         struct sk_buff *skb;
 417         struct ieee80211_tx_control control;
 418         struct ieee80211_bss_conf conf;
 419         int delayed_flags;
 420
 421         /*
 422          * Copy all data we need during this action under the protection
 423          * of a spinlock. Otherwise race conditions might occur which results
 424          * into an invalid configuration.
 425          */
 426         spin_lock(&intf->lock);
 427
 428         memcpy(&conf, &intf->conf, sizeof(conf));
 429         delayed_flags = intf->delayed_flags;
 430         intf->delayed_flags = 0;
 431
 432         spin_unlock(&intf->lock);
 433
 434         if (delayed_flags & DELAYED_UPDATE_BEACON) {
 435                 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
 436                 if (skb) {
 437                         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 438                                                           &control);
 439                         dev_kfree_skb(skb);
 440                 }
 441         }
 442
 443         if (delayed_flags & DELAYED_CONFIG_ERP)
 444                 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
 445
 446         if (delayed_flags & DELAYED_LED_ASSOC)
 447                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 448 }
 449
 450 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 451 {
 452         struct rt2x00_dev *rt2x00dev =
 453             container_of(work, struct rt2x00_dev, intf_work);
 454
 455         /*
 456          * Iterate over each interface and perform the
 457          * requested configurations.
 458          */
 459         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 460                                             rt2x00lib_intf_scheduled_iter,
 461                                             rt2x00dev);
 462 }
 463
 464 /*
 465  * Interrupt context handlers.
 466  */
 467 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 468                                       struct ieee80211_vif *vif)
 469 {
 470         struct rt2x00_intf *intf = vif_to_intf(vif);
 471
 472         if (vif->type != IEEE80211_IF_TYPE_AP &&
 473             vif->type != IEEE80211_IF_TYPE_IBSS)
 474                 return;
 475
 476         spin_lock(&intf->lock);
 477         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 478         spin_unlock(&intf->lock);
 479 }
 480
 481 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 482 {
 483         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 484                 return;
 485
 486         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 487                                             rt2x00lib_beacondone_iter,
 488                                             rt2x00dev);
 489
 490         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 491 }
 492 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 493
 494 void rt2x00lib_txdone(struct queue_entry *entry,
 495                       struct txdone_entry_desc *txdesc)
 496 {
 497         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 498         struct skb_frame_desc *skbdesc;
 499         struct ieee80211_tx_status tx_status;
 500         int success = !!(txdesc->status == TX_SUCCESS ||
 501                          txdesc->status == TX_SUCCESS_RETRY);
 502         int fail = !!(txdesc->status == TX_FAIL_RETRY ||
 503                       txdesc->status == TX_FAIL_INVALID ||
 504                       txdesc->status == TX_FAIL_OTHER);
 505
 506         /*
 507          * Update TX statistics.
 508          */
 509         rt2x00dev->link.qual.tx_success += success;
 510         rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
 511
 512         /*
 513          * Initialize TX status
 514          */
 515         tx_status.flags = 0;
 516         tx_status.ack_signal = 0;
 517         tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
 518         tx_status.retry_count = txdesc->retry;
 519         memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
 520
 521         if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 522                 if (success)
 523                         tx_status.flags |= IEEE80211_TX_STATUS_ACK;
 524                 else
 525                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 526         }
 527
 528         tx_status.queue_length = entry->queue->limit;
 529         tx_status.queue_number = tx_status.control.queue;
 530
 531         if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 532                 if (success)
 533                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 534                 else
 535                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 536         }
 537
 538         /*
 539          * Send the tx_status to debugfs. Only send the status report
 540          * to mac80211 when the frame originated from there. If this was
 541          * a extra frame coming through a mac80211 library call (RTS/CTS)
 542          * then we should not send the status report back.
 543          * If send to mac80211, mac80211 will clean up the skb structure,
 544          * otherwise we have to do it ourself.
 545          */
 546         skbdesc = get_skb_frame_desc(entry->skb);
 547         skbdesc->frame_type = DUMP_FRAME_TXDONE;
 548
 549         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 550
 551         if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
 552                 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
 553                                             entry->skb, &tx_status);
 554         else
 555                 dev_kfree_skb(entry->skb);
 556         entry->skb = NULL;
 557 }
 558 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 559
 560 void rt2x00lib_rxdone(struct queue_entry *entry,
 561                       struct rxdone_entry_desc *rxdesc)
 562 {
 563         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 564         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 565         struct ieee80211_supported_band *sband;
 566         struct ieee80211_hdr *hdr;
 567         const struct rt2x00_rate *rate;
 568         unsigned int i;
 569         int idx = -1;
 570         u16 fc;
 571
 572         /*
 573          * Update RX statistics.
 574          */
 575         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 576         for (i = 0; i < sband->n_bitrates; i++) {
 577                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 578
 579                 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 580                      (rate->plcp == rxdesc->signal)) ||
 581                     (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
 582                       (rate->bitrate == rxdesc->signal))) {
 583                         idx = i;
 584                         break;
 585                 }
 586         }
 587
 588         if (idx < 0) {
 589                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 590                         "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
 591                         !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
 592                 idx = 0;
 593         }
 594
 595         /*
 596          * Only update link status if this is a beacon frame carrying our bssid.
 597          */
 598         hdr = (struct ieee80211_hdr *)entry->skb->data;
 599         fc = le16_to_cpu(hdr->frame_control);
 600         if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
 601                 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
 602
 603         rt2x00dev->link.qual.rx_success++;
 604
 605         rx_status->rate_idx = idx;
 606         rx_status->signal =
 607             rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
 608         rx_status->ssi = rxdesc->rssi;
 609         rx_status->flag = rxdesc->flags;
 610         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 611
 612         /*
 613          * Send frame to mac80211 & debugfs.
 614          * mac80211 will clean up the skb structure.
 615          */
 616         get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
 617         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 618         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 619         entry->skb = NULL;
 620 }
 621 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 622
 623 /*
 624  * TX descriptor initializer
 625  */
 626 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 627                              struct sk_buff *skb,
 628                              struct ieee80211_tx_control *control)
 629 {
 630         struct txentry_desc txdesc;
 631         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 632         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
 633         const struct rt2x00_rate *rate;
 634         int tx_rate;
 635         int length;
 636         int duration;
 637         int residual;
 638         u16 frame_control;
 639         u16 seq_ctrl;
 640
 641         memset(&txdesc, 0, sizeof(txdesc));
 642
 643         txdesc.queue = skbdesc->entry->queue->qid;
 644         txdesc.cw_min = skbdesc->entry->queue->cw_min;
 645         txdesc.cw_max = skbdesc->entry->queue->cw_max;
 646         txdesc.aifs = skbdesc->entry->queue->aifs;
 647
 648         /*
 649          * Read required fields from ieee80211 header.
 650          */
 651         frame_control = le16_to_cpu(hdr->frame_control);
 652         seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
 653
 654         tx_rate = control->tx_rate->hw_value;
 655
 656         /*
 657          * Check whether this frame is to be acked
 658          */
 659         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 660                 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 661
 662         /*
 663          * Check if this is a RTS/CTS frame
 664          */
 665         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 666                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 667                 if (is_rts_frame(frame_control)) {
 668                         __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
 669                         __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
 670                 } else
 671                         __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
 672                 if (control->rts_cts_rate)
 673                         tx_rate = control->rts_cts_rate->hw_value;
 674         }
 675
 676         rate = rt2x00_get_rate(tx_rate);
 677
 678         /*
 679          * Check if more fragments are pending
 680          */
 681         if (ieee80211_get_morefrag(hdr)) {
 682                 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
 683                 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
 684         }
 685
 686         /*
 687          * Beacons and probe responses require the tsf timestamp
 688          * to be inserted into the frame.
 689          */
 690         if (control->queue == RT2X00_BCN_QUEUE_BEACON ||
 691             is_probe_resp(frame_control))
 692                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
 693
 694         /*
 695          * Determine with what IFS priority this frame should be send.
 696          * Set ifs to IFS_SIFS when the this is not the first fragment,
 697          * or this fragment came after RTS/CTS.
 698          */
 699         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 700             test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
 701                 txdesc.ifs = IFS_SIFS;
 702         else
 703                 txdesc.ifs = IFS_BACKOFF;
 704
 705         /*
 706          * PLCP setup
 707          * Length calculation depends on OFDM/CCK rate.
 708          */
 709         txdesc.signal = rate->plcp;
 710         txdesc.service = 0x04;
 711
 712         length = skbdesc->data_len + FCS_LEN;
 713         if (rate->flags & DEV_RATE_OFDM) {
 714                 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
 715
 716                 txdesc.length_high = (length >> 6) & 0x3f;
 717                 txdesc.length_low = length & 0x3f;
 718         } else {
 719                 /*
 720                  * Convert length to microseconds.
 721                  */
 722                 residual = get_duration_res(length, rate->bitrate);
 723                 duration = get_duration(length, rate->bitrate);
 724
 725                 if (residual != 0) {
 726                         duration++;
 727
 728                         /*
 729                          * Check if we need to set the Length Extension
 730                          */
 731                         if (rate->bitrate == 110 && residual <= 30)
 732                                 txdesc.service |= 0x80;
 733                 }
 734
 735                 txdesc.length_high = (duration >> 8) & 0xff;
 736                 txdesc.length_low = duration & 0xff;
 737
 738                 /*
 739                  * When preamble is enabled we should set the
 740                  * preamble bit for the signal.
 741                  */
 742                 if (rt2x00_get_rate_preamble(tx_rate))
 743                         txdesc.signal |= 0x08;
 744         }
 745
 746         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
 747
 748         /*
 749          * Update queue entry.
 750          */
 751         skbdesc->entry->skb = skb;
 752
 753         /*
 754          * The frame has been completely initialized and ready
 755          * for sending to the device. The caller will push the
 756          * frame to the device, but we are going to push the
 757          * frame to debugfs here.
 758          */
 759         skbdesc->frame_type = DUMP_FRAME_TX;
 760         rt2x00debug_dump_frame(rt2x00dev, skb);
 761 }
 762 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 763
 764 /*
 765  * Driver initialization handlers.
 766  */
 767 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 768         {
 769                 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
 770                 .bitrate = 10,
 771                 .ratemask = BIT(0),
 772                 .plcp = 0x00,
 773         },
 774         {
 775                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 776                 .bitrate = 20,
 777                 .ratemask = BIT(1),
 778                 .plcp = 0x01,
 779         },
 780         {
 781                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 782                 .bitrate = 55,
 783                 .ratemask = BIT(2),
 784                 .plcp = 0x02,
 785         },
 786         {
 787                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
 788                 .bitrate = 110,
 789                 .ratemask = BIT(3),
 790                 .plcp = 0x03,
 791         },
 792         {
 793                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 794                 .bitrate = 60,
 795                 .ratemask = BIT(4),
 796                 .plcp = 0x0b,
 797         },
 798         {
 799                 .flags = DEV_RATE_OFDM,
 800                 .bitrate = 90,
 801                 .ratemask = BIT(5),
 802                 .plcp = 0x0f,
 803         },
 804         {
 805                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 806                 .bitrate = 120,
 807                 .ratemask = BIT(6),
 808                 .plcp = 0x0a,
 809         },
 810         {
 811                 .flags = DEV_RATE_OFDM,
 812                 .bitrate = 180,
 813                 .ratemask = BIT(7),
 814                 .plcp = 0x0e,
 815         },
 816         {
 817                 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
 818                 .bitrate = 240,
 819                 .ratemask = BIT(8),
 820                 .plcp = 0x09,
 821         },
 822         {
 823                 .flags = DEV_RATE_OFDM,
 824                 .bitrate = 360,
 825                 .ratemask = BIT(9),
 826                 .plcp = 0x0d,
 827         },
 828         {
 829                 .flags = DEV_RATE_OFDM,
 830                 .bitrate = 480,
 831                 .ratemask = BIT(10),
 832                 .plcp = 0x08,
 833         },
 834         {
 835                 .flags = DEV_RATE_OFDM,
 836                 .bitrate = 540,
 837                 .ratemask = BIT(11),
 838                 .plcp = 0x0c,
 839         },
 840 };
 841
 842 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 843                               const int channel, const int tx_power,
 844                               const int value)
 845 {
 846         entry->center_freq = ieee80211_channel_to_frequency(channel);
 847         entry->hw_value = value;
 848         entry->max_power = tx_power;
 849         entry->max_antenna_gain = 0xff;
 850 }
 851
 852 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 853                            const u16 index, const struct rt2x00_rate *rate)
 854 {
 855         entry->flags = 0;
 856         entry->bitrate = rate->bitrate;
 857         entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
 858         entry->hw_value_short = entry->hw_value;
 859
 860         if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
 861                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 862                 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
 863         }
 864 }
 865
 866 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 867                                     struct hw_mode_spec *spec)
 868 {
 869         struct ieee80211_hw *hw = rt2x00dev->hw;
 870         struct ieee80211_channel *channels;
 871         struct ieee80211_rate *rates;
 872         unsigned int num_rates;
 873         unsigned int i;
 874         unsigned char tx_power;
 875
 876         num_rates = 0;
 877         if (spec->supported_rates & SUPPORT_RATE_CCK)
 878                 num_rates += 4;
 879         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 880                 num_rates += 8;
 881
 882         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 883         if (!channels)
 884                 return -ENOMEM;
 885
 886         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 887         if (!rates)
 888                 goto exit_free_channels;
 889
 890         /*
 891          * Initialize Rate list.
 892          */
 893         for (i = 0; i < num_rates; i++)
 894                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 895
 896         /*
 897          * Initialize Channel list.
 898          */
 899         for (i = 0; i < spec->num_channels; i++) {
 900                 if (spec->channels[i].channel <= 14) {
 901                         if (spec->tx_power_bg)
 902                                 tx_power = spec->tx_power_bg[i];
 903                         else
 904                                 tx_power = spec->tx_power_default;
 905                 } else {
 906                         if (spec->tx_power_a)
 907                                 tx_power = spec->tx_power_a[i];
 908                         else
 909                                 tx_power = spec->tx_power_default;
 910                 }
 911
 912                 rt2x00lib_channel(&channels[i],
 913                                   spec->channels[i].channel, tx_power, i);
 914         }
 915
 916         /*
 917          * Intitialize 802.11b, 802.11g
 918          * Rates: CCK, OFDM.
 919          * Channels: 2.4 GHz
 920          */
 921         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 922                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 923                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 924                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 925                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 926                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 927                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 928         }
 929
 930         /*
 931          * Intitialize 802.11a
 932          * Rates: OFDM.
 933          * Channels: OFDM, UNII, HiperLAN2.
 934          */
 935         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 936                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 937                     spec->num_channels - 14;
 938                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 939                     num_rates - 4;
 940                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 941                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 942                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 943                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 944         }
 945
 946         return 0;
 947
 948  exit_free_channels:
 949         kfree(channels);
 950         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 951         return -ENOMEM;
 952 }
 953
 954 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 955 {
 956         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 957                 ieee80211_unregister_hw(rt2x00dev->hw);
 958
 959         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 960                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 961                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 962                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 963                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 964         }
 965 }
 966
 967 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 968 {
 969         struct hw_mode_spec *spec = &rt2x00dev->spec;
 970         int status;
 971
 972         /*
 973          * Initialize HW modes.
 974          */
 975         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 976         if (status)
 977                 return status;
 978
 979         /*
 980          * Register HW.
 981          */
 982         status = ieee80211_register_hw(rt2x00dev->hw);
 983         if (status) {
 984                 rt2x00lib_remove_hw(rt2x00dev);
 985                 return status;
 986         }
 987
 988         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 989
 990         return 0;
 991 }
 992
 993 /*
 994  * Initialization/uninitialization handlers.
 995  */
 996 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 997 {
 998         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 999                 return;
1000
1001         /*
1002          * Unregister extra components.
1003          */
1004         rt2x00rfkill_unregister(rt2x00dev);
1005
1006         /*
1007          * Allow the HW to uninitialize.
1008          */
1009         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1010
1011         /*
1012          * Free allocated queue entries.
1013          */
1014         rt2x00queue_uninitialize(rt2x00dev);
1015 }
1016
1017 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1018 {
1019         int status;
1020
1021         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1022                 return 0;
1023
1024         /*
1025          * Allocate all queue entries.
1026          */
1027         status = rt2x00queue_initialize(rt2x00dev);
1028         if (status)
1029                 return status;
1030
1031         /*
1032          * Initialize the device.
1033          */
1034         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1035         if (status)
1036                 goto exit;
1037
1038         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1039
1040         /*
1041          * Register the extra components.
1042          */
1043         rt2x00rfkill_register(rt2x00dev);
1044
1045         return 0;
1046
1047 exit:
1048         rt2x00lib_uninitialize(rt2x00dev);
1049
1050         return status;
1051 }
1052
1053 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1054 {
1055         int retval;
1056
1057         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1058                 return 0;
1059
1060         /*
1061          * If this is the first interface which is added,
1062          * we should load the firmware now.
1063          */
1064         retval = rt2x00lib_load_firmware(rt2x00dev);
1065         if (retval)
1066                 return retval;
1067
1068         /*
1069          * Initialize the device.
1070          */
1071         retval = rt2x00lib_initialize(rt2x00dev);
1072         if (retval)
1073                 return retval;
1074
1075         /*
1076          * Enable radio.
1077          */
1078         retval = rt2x00lib_enable_radio(rt2x00dev);
1079         if (retval) {
1080                 rt2x00lib_uninitialize(rt2x00dev);
1081                 return retval;
1082         }
1083
1084         rt2x00dev->intf_ap_count = 0;
1085         rt2x00dev->intf_sta_count = 0;
1086         rt2x00dev->intf_associated = 0;
1087
1088         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1089
1090         return 0;
1091 }
1092
1093 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1094 {
1095         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1096                 return;
1097
1098         /*
1099          * Perhaps we can add something smarter here,
1100          * but for now just disabling the radio should do.
1101          */
1102         rt2x00lib_disable_radio(rt2x00dev);
1103
1104         rt2x00dev->intf_ap_count = 0;
1105         rt2x00dev->intf_sta_count = 0;
1106         rt2x00dev->intf_associated = 0;
1107
1108         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1109 }
1110
1111 /*
1112  * driver allocation handlers.
1113  */
1114 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1115 {
1116         int retval = -ENOMEM;
1117
1118         /*
1119          * Make room for rt2x00_intf inside the per-interface
1120          * structure ieee80211_vif.
1121          */
1122         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1123
1124         /*
1125          * Let the driver probe the device to detect the capabilities.
1126          */
1127         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1128         if (retval) {
1129                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1130                 goto exit;
1131         }
1132
1133         /*
1134          * Initialize configuration work.
1135          */
1136         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1137         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1138         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1139
1140         /*
1141          * Allocate queue array.
1142          */
1143         retval = rt2x00queue_allocate(rt2x00dev);
1144         if (retval)
1145                 goto exit;
1146
1147         /*
1148          * Initialize ieee80211 structure.
1149          */
1150         retval = rt2x00lib_probe_hw(rt2x00dev);
1151         if (retval) {
1152                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1153                 goto exit;
1154         }
1155
1156         /*
1157          * Register extra components.
1158          */
1159         rt2x00leds_register(rt2x00dev);
1160         rt2x00rfkill_allocate(rt2x00dev);
1161         rt2x00debug_register(rt2x00dev);
1162
1163         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1164
1165         return 0;
1166
1167 exit:
1168         rt2x00lib_remove_dev(rt2x00dev);
1169
1170         return retval;
1171 }
1172 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1173
1174 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1175 {
1176         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1177
1178         /*
1179          * Disable radio.
1180          */
1181         rt2x00lib_disable_radio(rt2x00dev);
1182
1183         /*
1184          * Uninitialize device.
1185          */
1186         rt2x00lib_uninitialize(rt2x00dev);
1187
1188         /*
1189          * Free extra components
1190          */
1191         rt2x00debug_deregister(rt2x00dev);
1192         rt2x00rfkill_free(rt2x00dev);
1193         rt2x00leds_unregister(rt2x00dev);
1194
1195         /*
1196          * Free ieee80211_hw memory.
1197          */
1198         rt2x00lib_remove_hw(rt2x00dev);
1199
1200         /*
1201          * Free firmware image.
1202          */
1203         rt2x00lib_free_firmware(rt2x00dev);
1204
1205         /*
1206          * Free queue structures.
1207          */
1208         rt2x00queue_free(rt2x00dev);
1209 }
1210 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1211
1212 /*
1213  * Device state handlers
1214  */
1215 #ifdef CONFIG_PM
1216 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1217 {
1218         int retval;
1219
1220         NOTICE(rt2x00dev, "Going to sleep.\n");
1221         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1222
1223         /*
1224          * Only continue if mac80211 has open interfaces.
1225          */
1226         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1227                 goto exit;
1228         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1229
1230         /*
1231          * Disable radio.
1232          */
1233         rt2x00lib_stop(rt2x00dev);
1234         rt2x00lib_uninitialize(rt2x00dev);
1235
1236         /*
1237          * Suspend/disable extra components.
1238          */
1239         rt2x00leds_suspend(rt2x00dev);
1240         rt2x00rfkill_suspend(rt2x00dev);
1241         rt2x00debug_deregister(rt2x00dev);
1242
1243 exit:
1244         /*
1245          * Set device mode to sleep for power management,
1246          * on some hardware this call seems to consistently fail.
1247          * From the specifications it is hard to tell why it fails,
1248          * and if this is a "bad thing".
1249          * Overall it is safe to just ignore the failure and
1250          * continue suspending. The only downside is that the
1251          * device will not be in optimal power save mode, but with
1252          * the radio and the other components already disabled the
1253          * device is as good as disabled.
1254          */
1255         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1256         if (retval)
1257                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1258                         "continue suspending.\n");
1259
1260         return 0;
1261 }
1262 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1263
1264 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1265                                   struct ieee80211_vif *vif)
1266 {
1267         struct rt2x00_dev *rt2x00dev = data;
1268         struct rt2x00_intf *intf = vif_to_intf(vif);
1269
1270         spin_lock(&intf->lock);
1271
1272         rt2x00lib_config_intf(rt2x00dev, intf,
1273                               vif->type, intf->mac, intf->bssid);
1274
1275
1276         /*
1277          * Master or Ad-hoc mode require a new beacon update.
1278          */
1279         if (vif->type == IEEE80211_IF_TYPE_AP ||
1280             vif->type == IEEE80211_IF_TYPE_IBSS)
1281                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1282
1283         spin_unlock(&intf->lock);
1284 }
1285
1286 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1287 {
1288         int retval;
1289
1290         NOTICE(rt2x00dev, "Waking up.\n");
1291
1292         /*
1293          * Restore/enable extra components.
1294          */
1295         rt2x00debug_register(rt2x00dev);
1296         rt2x00rfkill_resume(rt2x00dev);
1297         rt2x00leds_resume(rt2x00dev);
1298
1299         /*
1300          * Only continue if mac80211 had open interfaces.
1301          */
1302         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1303                 return 0;
1304
1305         /*
1306          * Reinitialize device and all active interfaces.
1307          */
1308         retval = rt2x00lib_start(rt2x00dev);
1309         if (retval)
1310                 goto exit;
1311
1312         /*
1313          * Reconfigure device.
1314          */
1315         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1316         if (!rt2x00dev->hw->conf.radio_enabled)
1317                 rt2x00lib_disable_radio(rt2x00dev);
1318
1319         /*
1320          * Iterator over each active interface to
1321          * reconfigure the hardware.
1322          */
1323         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1324                                             rt2x00lib_resume_intf, rt2x00dev);
1325
1326         /*
1327          * We are ready again to receive requests from mac80211.
1328          */
1329         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1330
1331         /*
1332          * It is possible that during that mac80211 has attempted
1333          * to send frames while we were suspending or resuming.
1334          * In that case we have disabled the TX queue and should
1335          * now enable it again
1336          */
1337         ieee80211_start_queues(rt2x00dev->hw);
1338
1339         /*
1340          * During interface iteration we might have changed the
1341          * delayed_flags, time to handles the event by calling
1342          * the work handler directly.
1343          */
1344         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1345
1346         return 0;
1347
1348 exit:
1349         rt2x00lib_disable_radio(rt2x00dev);
1350         rt2x00lib_uninitialize(rt2x00dev);
1351         rt2x00debug_deregister(rt2x00dev);
1352
1353         return retval;
1354 }
1355 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1356 #endif /* CONFIG_PM */
1357
1358 /*
1359  * rt2x00lib module information.
1360  */
1361 MODULE_AUTHOR(DRV_PROJECT);
1362 MODULE_VERSION(DRV_VERSION);
1363 MODULE_DESCRIPTION("rt2x00 library");
1364 MODULE_LICENSE("GPL");