drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31 #include "rt2x00dump.h"
  32
  33 /*
  34  * Ring handler.
  35  */
  36 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
  37                                      const unsigned int queue)
  38 {
  39         int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
  40
  41         /*
  42          * Check if we are requesting a reqular TX ring,
  43          * or if we are requesting a Beacon or Atim ring.
  44          * For Atim rings, we should check if it is supported.
  45          */
  46         if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
  47                 return &rt2x00dev->tx[queue];
  48
  49         if (!rt2x00dev->bcn || !beacon)
  50                 return NULL;
  51
  52         if (queue == IEEE80211_TX_QUEUE_BEACON)
  53                 return &rt2x00dev->bcn[0];
  54         else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
  55                 return &rt2x00dev->bcn[1];
  56
  57         return NULL;
  58 }
  59 EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);
  60
  61 /*
  62  * Link tuning handlers
  63  */
  64 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  65 {
  66         rt2x00dev->link.count = 0;
  67         rt2x00dev->link.vgc_level = 0;
  68
  69         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  70
  71         /*
  72          * The RX and TX percentage should start at 50%
  73          * this will assure we will get at least get some
  74          * decent value when the link tuner starts.
  75          * The value will be dropped and overwritten with
  76          * the correct (measured )value anyway during the
  77          * first run of the link tuner.
  78          */
  79         rt2x00dev->link.qual.rx_percentage = 50;
  80         rt2x00dev->link.qual.tx_percentage = 50;
  81
  82         /*
  83          * Reset the link tuner.
  84          */
  85         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  86
  87         queue_delayed_work(rt2x00dev->hw->workqueue,
  88                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  89 }
  90
  91 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  92 {
  93         cancel_delayed_work_sync(&rt2x00dev->link.work);
  94 }
  95
  96 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  97 {
  98         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  99                 return;
 100
 101         rt2x00lib_stop_link_tuner(rt2x00dev);
 102         rt2x00lib_start_link_tuner(rt2x00dev);
 103 }
 104
 105 /*
 106  * Ring initialization
 107  */
 108 static void rt2x00lib_init_rxrings(struct rt2x00_dev *rt2x00dev)
 109 {
 110         struct data_ring *ring = rt2x00dev->rx;
 111         unsigned int i;
 112
 113         if (!rt2x00dev->ops->lib->init_rxentry)
 114                 return;
 115
 116         if (ring->data_addr)
 117                 memset(ring->data_addr, 0, rt2x00_get_ring_size(ring));
 118
 119         for (i = 0; i < ring->stats.limit; i++)
 120                 rt2x00dev->ops->lib->init_rxentry(rt2x00dev, &ring->entry[i]);
 121
 122         rt2x00_ring_index_clear(ring);
 123 }
 124
 125 static void rt2x00lib_init_txrings(struct rt2x00_dev *rt2x00dev)
 126 {
 127         struct data_ring *ring;
 128         unsigned int i;
 129
 130         if (!rt2x00dev->ops->lib->init_txentry)
 131                 return;
 132
 133         txringall_for_each(rt2x00dev, ring) {
 134                 if (ring->data_addr)
 135                         memset(ring->data_addr, 0, rt2x00_get_ring_size(ring));
 136
 137                 for (i = 0; i < ring->stats.limit; i++)
 138                         rt2x00dev->ops->lib->init_txentry(rt2x00dev,
 139                                                           &ring->entry[i]);
 140
 141                 rt2x00_ring_index_clear(ring);
 142         }
 143 }
 144
 145 /*
 146  * Radio control handlers.
 147  */
 148 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
 149 {
 150         int status;
 151
 152         /*
 153          * Don't enable the radio twice.
 154          * And check if the hardware button has been disabled.
 155          */
 156         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
 157             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
 158                 return 0;
 159
 160         /*
 161          * Initialize all data rings.
 162          */
 163         rt2x00lib_init_rxrings(rt2x00dev);
 164         rt2x00lib_init_txrings(rt2x00dev);
 165
 166         /*
 167          * Enable radio.
 168          */
 169         status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 170                                                        STATE_RADIO_ON);
 171         if (status)
 172                 return status;
 173
 174         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 175
 176         /*
 177          * Enable RX.
 178          */
 179         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 180
 181         /*
 182          * Start the TX queues.
 183          */
 184         ieee80211_start_queues(rt2x00dev->hw);
 185
 186         return 0;
 187 }
 188
 189 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 190 {
 191         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 192                 return;
 193
 194         /*
 195          * Stop all scheduled work.
 196          */
 197         if (work_pending(&rt2x00dev->beacon_work))
 198                 cancel_work_sync(&rt2x00dev->beacon_work);
 199         if (work_pending(&rt2x00dev->filter_work))
 200                 cancel_work_sync(&rt2x00dev->filter_work);
 201         if (work_pending(&rt2x00dev->config_work))
 202                 cancel_work_sync(&rt2x00dev->config_work);
 203
 204         /*
 205          * Stop the TX queues.
 206          */
 207         ieee80211_stop_queues(rt2x00dev->hw);
 208
 209         /*
 210          * Disable RX.
 211          */
 212         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 213
 214         /*
 215          * Disable radio.
 216          */
 217         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 218 }
 219
 220 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 221 {
 222         /*
 223          * When we are disabling the RX, we should also stop the link tuner.
 224          */
 225         if (state == STATE_RADIO_RX_OFF)
 226                 rt2x00lib_stop_link_tuner(rt2x00dev);
 227
 228         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 229
 230         /*
 231          * When we are enabling the RX, we should also start the link tuner.
 232          */
 233         if (state == STATE_RADIO_RX_ON &&
 234             is_interface_present(&rt2x00dev->interface))
 235                 rt2x00lib_start_link_tuner(rt2x00dev);
 236 }
 237
 238 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 239 {
 240         enum antenna rx = rt2x00dev->link.ant.active.rx;
 241         enum antenna tx = rt2x00dev->link.ant.active.tx;
 242         int sample_a =
 243             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
 244         int sample_b =
 245             rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
 246
 247         /*
 248          * We are done sampling. Now we should evaluate the results.
 249          */
 250         rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 251
 252         /*
 253          * During the last period we have sampled the RSSI
 254          * from both antenna's. It now is time to determine
 255          * which antenna demonstrated the best performance.
 256          * When we are already on the antenna with the best
 257          * performance, then there really is nothing for us
 258          * left to do.
 259          */
 260         if (sample_a == sample_b)
 261                 return;
 262
 263         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) {
 264                 if (sample_a > sample_b && rx == ANTENNA_B)
 265                         rx = ANTENNA_A;
 266                 else if (rx == ANTENNA_A)
 267                         rx = ANTENNA_B;
 268         }
 269
 270         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) {
 271                 if (sample_a > sample_b && tx == ANTENNA_B)
 272                         tx = ANTENNA_A;
 273                 else if (tx == ANTENNA_A)
 274                         tx = ANTENNA_B;
 275         }
 276
 277         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 278 }
 279
 280 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
 281 {
 282         enum antenna rx = rt2x00dev->link.ant.active.rx;
 283         enum antenna tx = rt2x00dev->link.ant.active.tx;
 284         int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
 285         int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
 286
 287         /*
 288          * Legacy driver indicates that we should swap antenna's
 289          * when the difference in RSSI is greater that 5. This
 290          * also should be done when the RSSI was actually better
 291          * then the previous sample.
 292          * When the difference exceeds the threshold we should
 293          * sample the rssi from the other antenna to make a valid
 294          * comparison between the 2 antennas.
 295          */
 296         if ((rssi_curr - rssi_old) > -5 || (rssi_curr - rssi_old) < 5)
 297                 return;
 298
 299         rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
 300
 301         if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
 302                 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 303
 304         if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
 305                 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 306
 307         rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 308 }
 309
 310 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 311 {
 312         /*
 313          * Determine if software diversity is enabled for
 314          * either the TX or RX antenna (or both).
 315          * Always perform this check since within the link
 316          * tuner interval the configuration might have changed.
 317          */
 318         rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
 319         rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
 320
 321         if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
 322             rt2x00dev->default_ant.rx != ANTENNA_SW_DIVERSITY)
 323                 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
 324         if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
 325             rt2x00dev->default_ant.tx != ANTENNA_SW_DIVERSITY)
 326                 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
 327
 328         if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 329             !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
 330                 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
 331                 return;
 332         }
 333
 334         /*
 335          * If we have only sampled the data over the last period
 336          * we should now harvest the data. Otherwise just evaluate
 337          * the data. The latter should only be performed once
 338          * every 2 seconds.
 339          */
 340         if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
 341                 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
 342         else if (rt2x00dev->link.count & 1)
 343                 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
 344 }
 345
 346 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
 347 {
 348         int avg_rssi = rssi;
 349
 350         /*
 351          * Update global RSSI
 352          */
 353         if (link->qual.avg_rssi)
 354                 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
 355         link->qual.avg_rssi = avg_rssi;
 356
 357         /*
 358          * Update antenna RSSI
 359          */
 360         if (link->ant.rssi_ant)
 361                 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
 362         link->ant.rssi_ant = rssi;
 363 }
 364
 365 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 366 {
 367         if (qual->rx_failed || qual->rx_success)
 368                 qual->rx_percentage =
 369                     (qual->rx_success * 100) /
 370                     (qual->rx_failed + qual->rx_success);
 371         else
 372                 qual->rx_percentage = 50;
 373
 374         if (qual->tx_failed || qual->tx_success)
 375                 qual->tx_percentage =
 376                     (qual->tx_success * 100) /
 377                     (qual->tx_failed + qual->tx_success);
 378         else
 379                 qual->tx_percentage = 50;
 380
 381         qual->rx_success = 0;
 382         qual->rx_failed = 0;
 383         qual->tx_success = 0;
 384         qual->tx_failed = 0;
 385 }
 386
 387 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 388                                            int rssi)
 389 {
 390         int rssi_percentage = 0;
 391         int signal;
 392
 393         /*
 394          * We need a positive value for the RSSI.
 395          */
 396         if (rssi < 0)
 397                 rssi += rt2x00dev->rssi_offset;
 398
 399         /*
 400          * Calculate the different percentages,
 401          * which will be used for the signal.
 402          */
 403         if (rt2x00dev->rssi_offset)
 404                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 405
 406         /*
 407          * Add the individual percentages and use the WEIGHT
 408          * defines to calculate the current link signal.
 409          */
 410         signal = ((WEIGHT_RSSI * rssi_percentage) +
 411                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 412                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 413
 414         return (signal > 100) ? 100 : signal;
 415 }
 416
 417 static void rt2x00lib_link_tuner(struct work_struct *work)
 418 {
 419         struct rt2x00_dev *rt2x00dev =
 420             container_of(work, struct rt2x00_dev, link.work.work);
 421
 422         /*
 423          * When the radio is shutting down we should
 424          * immediately cease all link tuning.
 425          */
 426         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 427                 return;
 428
 429         /*
 430          * Update statistics.
 431          */
 432         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 433         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 434             rt2x00dev->link.qual.rx_failed;
 435
 436         /*
 437          * Only perform the link tuning when Link tuning
 438          * has been enabled (This could have been disabled from the EEPROM).
 439          */
 440         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 441                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 442
 443         /*
 444          * Evaluate antenna setup.
 445          */
 446         rt2x00lib_evaluate_antenna(rt2x00dev);
 447
 448         /*
 449          * Precalculate a portion of the link signal which is
 450          * in based on the tx/rx success/failure counters.
 451          */
 452         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 453
 454         /*
 455          * Increase tuner counter, and reschedule the next link tuner run.
 456          */
 457         rt2x00dev->link.count++;
 458         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 459                            LINK_TUNE_INTERVAL);
 460 }
 461
 462 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 463 {
 464         struct rt2x00_dev *rt2x00dev =
 465             container_of(work, struct rt2x00_dev, filter_work);
 466         unsigned int filter = rt2x00dev->packet_filter;
 467
 468         /*
 469          * Since we had stored the filter inside interface.filter,
 470          * we should now clear that field. Otherwise the driver will
 471          * assume nothing has changed (*total_flags will be compared
 472          * to interface.filter to determine if any action is required).
 473          */
 474         rt2x00dev->packet_filter = 0;
 475
 476         rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
 477                                              filter, &filter, 0, NULL);
 478 }
 479
 480 static void rt2x00lib_configuration_scheduled(struct work_struct *work)
 481 {
 482         struct rt2x00_dev *rt2x00dev =
 483             container_of(work, struct rt2x00_dev, config_work);
 484         struct ieee80211_bss_conf bss_conf;
 485
 486         bss_conf.use_short_preamble =
 487                 test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
 488
 489         /*
 490          * FIXME: shouldn't invoke it this way because all other contents
 491          *        of bss_conf is invalid.
 492          */
 493         rt2x00mac_bss_info_changed(rt2x00dev->hw, rt2x00dev->interface.id,
 494                                    &bss_conf, BSS_CHANGED_ERP_PREAMBLE);
 495 }
 496
 497 /*
 498  * Interrupt context handlers.
 499  */
 500 static void rt2x00lib_beacondone_scheduled(struct work_struct *work)
 501 {
 502         struct rt2x00_dev *rt2x00dev =
 503             container_of(work, struct rt2x00_dev, beacon_work);
 504         struct data_ring *ring =
 505             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
 506         struct data_entry *entry = rt2x00_get_data_entry(ring);
 507         struct sk_buff *skb;
 508
 509         skb = ieee80211_beacon_get(rt2x00dev->hw,
 510                                    rt2x00dev->interface.id,
 511                                    &entry->tx_status.control);
 512         if (!skb)
 513                 return;
 514
 515         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 516                                           &entry->tx_status.control);
 517
 518         dev_kfree_skb(skb);
 519 }
 520
 521 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 522 {
 523         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 524                 return;
 525
 526         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
 527 }
 528 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 529
 530 void rt2x00lib_txdone(struct data_entry *entry,
 531                       const int status, const int retry)
 532 {
 533         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 534         struct ieee80211_tx_status *tx_status = &entry->tx_status;
 535         struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
 536         int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
 537         int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
 538                       status == TX_FAIL_OTHER);
 539
 540         /*
 541          * Update TX statistics.
 542          */
 543         tx_status->flags = 0;
 544         tx_status->ack_signal = 0;
 545         tx_status->excessive_retries = (status == TX_FAIL_RETRY);
 546         tx_status->retry_count = retry;
 547         rt2x00dev->link.qual.tx_success += success;
 548         rt2x00dev->link.qual.tx_failed += retry + fail;
 549
 550         if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
 551                 if (success)
 552                         tx_status->flags |= IEEE80211_TX_STATUS_ACK;
 553                 else
 554                         stats->dot11ACKFailureCount++;
 555         }
 556
 557         tx_status->queue_length = entry->ring->stats.limit;
 558         tx_status->queue_number = tx_status->control.queue;
 559
 560         if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 561                 if (success)
 562                         stats->dot11RTSSuccessCount++;
 563                 else
 564                         stats->dot11RTSFailureCount++;
 565         }
 566
 567         /*
 568          * Send the tx_status to mac80211 & debugfs.
 569          * mac80211 will clean up the skb structure.
 570          */
 571         get_skb_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE;
 572         rt2x00debug_dump_frame(rt2x00dev, entry->skb);
 573         ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
 574         entry->skb = NULL;
 575 }
 576 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 577
 578 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 579                       struct rxdata_entry_desc *desc)
 580 {
 581         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 582         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 583         struct ieee80211_hw_mode *mode;
 584         struct ieee80211_rate *rate;
 585         struct ieee80211_hdr *hdr;
 586         unsigned int i;
 587         int val = 0;
 588         u16 fc;
 589
 590         /*
 591          * Update RX statistics.
 592          */
 593         mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
 594         for (i = 0; i < mode->num_rates; i++) {
 595                 rate = &mode->rates[i];
 596
 597                 /*
 598                  * When frame was received with an OFDM bitrate,
 599                  * the signal is the PLCP value. If it was received with
 600                  * a CCK bitrate the signal is the rate in 0.5kbit/s.
 601                  */
 602                 if (!desc->ofdm)
 603                         val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
 604                 else
 605                         val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
 606
 607                 if (val == desc->signal) {
 608                         val = rate->val;
 609                         break;
 610                 }
 611         }
 612
 613         /*
 614          * Only update link status if this is a beacon frame carrying our bssid.
 615          */
 616         hdr = (struct ieee80211_hdr*)skb->data;
 617         fc = le16_to_cpu(hdr->frame_control);
 618         if (is_beacon(fc) && desc->my_bss)
 619                 rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi);
 620
 621         rt2x00dev->link.qual.rx_success++;
 622
 623         rx_status->rate = val;
 624         rx_status->signal =
 625             rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
 626         rx_status->ssi = desc->rssi;
 627         rx_status->flag = desc->flags;
 628         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 629
 630         /*
 631          * Send frame to mac80211 & debugfs
 632          */
 633         get_skb_desc(skb)->frame_type = DUMP_FRAME_RXDONE;
 634         rt2x00debug_dump_frame(rt2x00dev, skb);
 635         ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
 636 }
 637 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 638
 639 /*
 640  * TX descriptor initializer
 641  */
 642 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 643                              struct sk_buff *skb,
 644                              struct ieee80211_tx_control *control)
 645 {
 646         struct txdata_entry_desc desc;
 647         struct skb_desc *skbdesc = get_skb_desc(skb);
 648         struct ieee80211_hdr *ieee80211hdr = skbdesc->data;
 649         int tx_rate;
 650         int bitrate;
 651         int length;
 652         int duration;
 653         int residual;
 654         u16 frame_control;
 655         u16 seq_ctrl;
 656
 657         memset(&desc, 0, sizeof(desc));
 658
 659         desc.cw_min = skbdesc->ring->tx_params.cw_min;
 660         desc.cw_max = skbdesc->ring->tx_params.cw_max;
 661         desc.aifs = skbdesc->ring->tx_params.aifs;
 662
 663         /*
 664          * Identify queue
 665          */
 666         if (control->queue < rt2x00dev->hw->queues)
 667                 desc.queue = control->queue;
 668         else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 669                  control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
 670                 desc.queue = QUEUE_MGMT;
 671         else
 672                 desc.queue = QUEUE_OTHER;
 673
 674         /*
 675          * Read required fields from ieee80211 header.
 676          */
 677         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
 678         seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
 679
 680         tx_rate = control->tx_rate;
 681
 682         /*
 683          * Check whether this frame is to be acked
 684          */
 685         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 686                 __set_bit(ENTRY_TXD_ACK, &desc.flags);
 687
 688         /*
 689          * Check if this is a RTS/CTS frame
 690          */
 691         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 692                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 693                 if (is_rts_frame(frame_control)) {
 694                         __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
 695                         __set_bit(ENTRY_TXD_ACK, &desc.flags);
 696                 } else
 697                         __clear_bit(ENTRY_TXD_ACK, &desc.flags);
 698                 if (control->rts_cts_rate)
 699                         tx_rate = control->rts_cts_rate;
 700         }
 701
 702         /*
 703          * Check for OFDM
 704          */
 705         if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
 706                 __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
 707
 708         /*
 709          * Check if more fragments are pending
 710          */
 711         if (ieee80211_get_morefrag(ieee80211hdr)) {
 712                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 713                 __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
 714         }
 715
 716         /*
 717          * Beacons and probe responses require the tsf timestamp
 718          * to be inserted into the frame.
 719          */
 720         if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 721             is_probe_resp(frame_control))
 722                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
 723
 724         /*
 725          * Determine with what IFS priority this frame should be send.
 726          * Set ifs to IFS_SIFS when the this is not the first fragment,
 727          * or this fragment came after RTS/CTS.
 728          */
 729         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 730             test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
 731                 desc.ifs = IFS_SIFS;
 732         else
 733                 desc.ifs = IFS_BACKOFF;
 734
 735         /*
 736          * PLCP setup
 737          * Length calculation depends on OFDM/CCK rate.
 738          */
 739         desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
 740         desc.service = 0x04;
 741
 742         length = skbdesc->data_len + FCS_LEN;
 743         if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
 744                 desc.length_high = (length >> 6) & 0x3f;
 745                 desc.length_low = length & 0x3f;
 746         } else {
 747                 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
 748
 749                 /*
 750                  * Convert length to microseconds.
 751                  */
 752                 residual = get_duration_res(length, bitrate);
 753                 duration = get_duration(length, bitrate);
 754
 755                 if (residual != 0) {
 756                         duration++;
 757
 758                         /*
 759                          * Check if we need to set the Length Extension
 760                          */
 761                         if (bitrate == 110 && residual <= 30)
 762                                 desc.service |= 0x80;
 763                 }
 764
 765                 desc.length_high = (duration >> 8) & 0xff;
 766                 desc.length_low = duration & 0xff;
 767
 768                 /*
 769                  * When preamble is enabled we should set the
 770                  * preamble bit for the signal.
 771                  */
 772                 if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
 773                         desc.signal |= 0x08;
 774         }
 775
 776         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &desc, control);
 777
 778         /*
 779          * Update ring entry.
 780          */
 781         skbdesc->entry->skb = skb;
 782         memcpy(&skbdesc->entry->tx_status.control, control, sizeof(*control));
 783
 784         /*
 785          * The frame has been completely initialized and ready
 786          * for sending to the device. The caller will push the
 787          * frame to the device, but we are going to push the
 788          * frame to debugfs here.
 789          */
 790         skbdesc->frame_type = DUMP_FRAME_TX;
 791         rt2x00debug_dump_frame(rt2x00dev, skb);
 792 }
 793 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 794
 795 /*
 796  * Driver initialization handlers.
 797  */
 798 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 799                               const int channel, const int tx_power,
 800                               const int value)
 801 {
 802         entry->chan = channel;
 803         if (channel <= 14)
 804                 entry->freq = 2407 + (5 * channel);
 805         else
 806                 entry->freq = 5000 + (5 * channel);
 807         entry->val = value;
 808         entry->flag =
 809             IEEE80211_CHAN_W_IBSS |
 810             IEEE80211_CHAN_W_ACTIVE_SCAN |
 811             IEEE80211_CHAN_W_SCAN;
 812         entry->power_level = tx_power;
 813         entry->antenna_max = 0xff;
 814 }
 815
 816 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 817                            const int rate, const int mask,
 818                            const int plcp, const int flags)
 819 {
 820         entry->rate = rate;
 821         entry->val =
 822             DEVICE_SET_RATE_FIELD(rate, RATE) |
 823             DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
 824             DEVICE_SET_RATE_FIELD(plcp, PLCP);
 825         entry->flags = flags;
 826         entry->val2 = entry->val;
 827         if (entry->flags & IEEE80211_RATE_PREAMBLE2)
 828                 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
 829         entry->min_rssi_ack = 0;
 830         entry->min_rssi_ack_delta = 0;
 831 }
 832
 833 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 834                                     struct hw_mode_spec *spec)
 835 {
 836         struct ieee80211_hw *hw = rt2x00dev->hw;
 837         struct ieee80211_hw_mode *hwmodes;
 838         struct ieee80211_channel *channels;
 839         struct ieee80211_rate *rates;
 840         unsigned int i;
 841         unsigned char tx_power;
 842
 843         hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
 844         if (!hwmodes)
 845                 goto exit;
 846
 847         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 848         if (!channels)
 849                 goto exit_free_modes;
 850
 851         rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
 852         if (!rates)
 853                 goto exit_free_channels;
 854
 855         /*
 856          * Initialize Rate list.
 857          */
 858         rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
 859                        0x00, IEEE80211_RATE_CCK);
 860         rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
 861                        0x01, IEEE80211_RATE_CCK_2);
 862         rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
 863                        0x02, IEEE80211_RATE_CCK_2);
 864         rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
 865                        0x03, IEEE80211_RATE_CCK_2);
 866
 867         if (spec->num_rates > 4) {
 868                 rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
 869                                0x0b, IEEE80211_RATE_OFDM);
 870                 rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
 871                                0x0f, IEEE80211_RATE_OFDM);
 872                 rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
 873                                0x0a, IEEE80211_RATE_OFDM);
 874                 rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
 875                                0x0e, IEEE80211_RATE_OFDM);
 876                 rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
 877                                0x09, IEEE80211_RATE_OFDM);
 878                 rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
 879                                0x0d, IEEE80211_RATE_OFDM);
 880                 rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
 881                                0x08, IEEE80211_RATE_OFDM);
 882                 rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
 883                                0x0c, IEEE80211_RATE_OFDM);
 884         }
 885
 886         /*
 887          * Initialize Channel list.
 888          */
 889         for (i = 0; i < spec->num_channels; i++) {
 890                 if (spec->channels[i].channel <= 14)
 891                         tx_power = spec->tx_power_bg[i];
 892                 else if (spec->tx_power_a)
 893                         tx_power = spec->tx_power_a[i];
 894                 else
 895                         tx_power = spec->tx_power_default;
 896
 897                 rt2x00lib_channel(&channels[i],
 898                                   spec->channels[i].channel, tx_power, i);
 899         }
 900
 901         /*
 902          * Intitialize 802.11b
 903          * Rates: CCK.
 904          * Channels: OFDM.
 905          */
 906         if (spec->num_modes > HWMODE_B) {
 907                 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
 908                 hwmodes[HWMODE_B].num_channels = 14;
 909                 hwmodes[HWMODE_B].num_rates = 4;
 910                 hwmodes[HWMODE_B].channels = channels;
 911                 hwmodes[HWMODE_B].rates = rates;
 912         }
 913
 914         /*
 915          * Intitialize 802.11g
 916          * Rates: CCK, OFDM.
 917          * Channels: OFDM.
 918          */
 919         if (spec->num_modes > HWMODE_G) {
 920                 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
 921                 hwmodes[HWMODE_G].num_channels = 14;
 922                 hwmodes[HWMODE_G].num_rates = spec->num_rates;
 923                 hwmodes[HWMODE_G].channels = channels;
 924                 hwmodes[HWMODE_G].rates = rates;
 925         }
 926
 927         /*
 928          * Intitialize 802.11a
 929          * Rates: OFDM.
 930          * Channels: OFDM, UNII, HiperLAN2.
 931          */
 932         if (spec->num_modes > HWMODE_A) {
 933                 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
 934                 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
 935                 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
 936                 hwmodes[HWMODE_A].channels = &channels[14];
 937                 hwmodes[HWMODE_A].rates = &rates[4];
 938         }
 939
 940         if (spec->num_modes > HWMODE_G &&
 941             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
 942                 goto exit_free_rates;
 943
 944         if (spec->num_modes > HWMODE_B &&
 945             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
 946                 goto exit_free_rates;
 947
 948         if (spec->num_modes > HWMODE_A &&
 949             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
 950                 goto exit_free_rates;
 951
 952         rt2x00dev->hwmodes = hwmodes;
 953
 954         return 0;
 955
 956 exit_free_rates:
 957         kfree(rates);
 958
 959 exit_free_channels:
 960         kfree(channels);
 961
 962 exit_free_modes:
 963         kfree(hwmodes);
 964
 965 exit:
 966         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 967         return -ENOMEM;
 968 }
 969
 970 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 971 {
 972         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 973                 ieee80211_unregister_hw(rt2x00dev->hw);
 974
 975         if (likely(rt2x00dev->hwmodes)) {
 976                 kfree(rt2x00dev->hwmodes->channels);
 977                 kfree(rt2x00dev->hwmodes->rates);
 978                 kfree(rt2x00dev->hwmodes);
 979                 rt2x00dev->hwmodes = NULL;
 980         }
 981 }
 982
 983 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 984 {
 985         struct hw_mode_spec *spec = &rt2x00dev->spec;
 986         int status;
 987
 988         /*
 989          * Initialize HW modes.
 990          */
 991         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 992         if (status)
 993                 return status;
 994
 995         /*
 996          * Register HW.
 997          */
 998         status = ieee80211_register_hw(rt2x00dev->hw);
 999         if (status) {
1000                 rt2x00lib_remove_hw(rt2x00dev);
1001                 return status;
1002         }
1003
1004         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
1005
1006         return 0;
1007 }
1008
1009 /*
1010  * Initialization/uninitialization handlers.
1011  */
1012 static int rt2x00lib_alloc_entries(struct data_ring *ring,
1013                                    const u16 max_entries, const u16 data_size,
1014                                    const u16 desc_size)
1015 {
1016         struct data_entry *entry;
1017         unsigned int i;
1018
1019         ring->stats.limit = max_entries;
1020         ring->data_size = data_size;
1021         ring->desc_size = desc_size;
1022
1023         /*
1024          * Allocate all ring entries.
1025          */
1026         entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
1027         if (!entry)
1028                 return -ENOMEM;
1029
1030         for (i = 0; i < ring->stats.limit; i++) {
1031                 entry[i].flags = 0;
1032                 entry[i].ring = ring;
1033                 entry[i].skb = NULL;
1034                 entry[i].entry_idx = i;
1035         }
1036
1037         ring->entry = entry;
1038
1039         return 0;
1040 }
1041
1042 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
1043 {
1044         struct data_ring *ring;
1045
1046         /*
1047          * Allocate the RX ring.
1048          */
1049         if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
1050                                     rt2x00dev->ops->rxd_size))
1051                 return -ENOMEM;
1052
1053         /*
1054          * First allocate the TX rings.
1055          */
1056         txring_for_each(rt2x00dev, ring) {
1057                 if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
1058                                             rt2x00dev->ops->txd_size))
1059                         return -ENOMEM;
1060         }
1061
1062         if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
1063                 return 0;
1064
1065         /*
1066          * Allocate the BEACON ring.
1067          */
1068         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
1069                                     MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
1070                 return -ENOMEM;
1071
1072         /*
1073          * Allocate the Atim ring.
1074          */
1075         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
1076                                     DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
1077                 return -ENOMEM;
1078
1079         return 0;
1080 }
1081
1082 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
1083 {
1084         struct data_ring *ring;
1085
1086         ring_for_each(rt2x00dev, ring) {
1087                 kfree(ring->entry);
1088                 ring->entry = NULL;
1089         }
1090 }
1091
1092 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
1093 {
1094         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1095                 return;
1096
1097         /*
1098          * Unregister rfkill.
1099          */
1100         rt2x00rfkill_unregister(rt2x00dev);
1101
1102         /*
1103          * Allow the HW to uninitialize.
1104          */
1105         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1106
1107         /*
1108          * Free allocated ring entries.
1109          */
1110         rt2x00lib_free_ring_entries(rt2x00dev);
1111 }
1112
1113 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1114 {
1115         int status;
1116
1117         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1118                 return 0;
1119
1120         /*
1121          * Allocate all ring entries.
1122          */
1123         status = rt2x00lib_alloc_ring_entries(rt2x00dev);
1124         if (status) {
1125                 ERROR(rt2x00dev, "Ring entries allocation failed.\n");
1126                 return status;
1127         }
1128
1129         /*
1130          * Initialize the device.
1131          */
1132         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1133         if (status)
1134                 goto exit;
1135
1136         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1137
1138         /*
1139          * Register the rfkill handler.
1140          */
1141         status = rt2x00rfkill_register(rt2x00dev);
1142         if (status)
1143                 goto exit_unitialize;
1144
1145         return 0;
1146
1147 exit_unitialize:
1148         rt2x00lib_uninitialize(rt2x00dev);
1149
1150 exit:
1151         rt2x00lib_free_ring_entries(rt2x00dev);
1152
1153         return status;
1154 }
1155
1156 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1157 {
1158         int retval;
1159
1160         if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1161                 return 0;
1162
1163         /*
1164          * If this is the first interface which is added,
1165          * we should load the firmware now.
1166          */
1167         if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
1168                 retval = rt2x00lib_load_firmware(rt2x00dev);
1169                 if (retval)
1170                         return retval;
1171         }
1172
1173         /*
1174          * Initialize the device.
1175          */
1176         retval = rt2x00lib_initialize(rt2x00dev);
1177         if (retval)
1178                 return retval;
1179
1180         /*
1181          * Enable radio.
1182          */
1183         retval = rt2x00lib_enable_radio(rt2x00dev);
1184         if (retval) {
1185                 rt2x00lib_uninitialize(rt2x00dev);
1186                 return retval;
1187         }
1188
1189         __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1190
1191         return 0;
1192 }
1193
1194 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1195 {
1196         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1197                 return;
1198
1199         /*
1200          * Perhaps we can add something smarter here,
1201          * but for now just disabling the radio should do.
1202          */
1203         rt2x00lib_disable_radio(rt2x00dev);
1204
1205         __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1206 }
1207
1208 /*
1209  * driver allocation handlers.
1210  */
1211 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
1212 {
1213         struct data_ring *ring;
1214         unsigned int index;
1215
1216         /*
1217          * We need the following rings:
1218          * RX: 1
1219          * TX: hw->queues
1220          * Beacon: 1 (if required)
1221          * Atim: 1 (if required)
1222          */
1223         rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
1224             (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags));
1225
1226         ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
1227         if (!ring) {
1228                 ERROR(rt2x00dev, "Ring allocation failed.\n");
1229                 return -ENOMEM;
1230         }
1231
1232         /*
1233          * Initialize pointers
1234          */
1235         rt2x00dev->rx = ring;
1236         rt2x00dev->tx = &rt2x00dev->rx[1];
1237         if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
1238                 rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
1239
1240         /*
1241          * Initialize ring parameters.
1242          * RX: queue_idx = 0
1243          * TX: queue_idx = IEEE80211_TX_QUEUE_DATA0 + index
1244          * TX: cw_min: 2^5 = 32.
1245          * TX: cw_max: 2^10 = 1024.
1246          */
1247         rt2x00dev->rx->rt2x00dev = rt2x00dev;
1248         rt2x00dev->rx->queue_idx = 0;
1249
1250         index = IEEE80211_TX_QUEUE_DATA0;
1251         txring_for_each(rt2x00dev, ring) {
1252                 ring->rt2x00dev = rt2x00dev;
1253                 ring->queue_idx = index++;
1254                 ring->tx_params.aifs = 2;
1255                 ring->tx_params.cw_min = 5;
1256                 ring->tx_params.cw_max = 10;
1257         }
1258
1259         return 0;
1260 }
1261
1262 static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
1263 {
1264         kfree(rt2x00dev->rx);
1265         rt2x00dev->rx = NULL;
1266         rt2x00dev->tx = NULL;
1267         rt2x00dev->bcn = NULL;
1268 }
1269
1270 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1271 {
1272         int retval = -ENOMEM;
1273
1274         /*
1275          * Let the driver probe the device to detect the capabilities.
1276          */
1277         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1278         if (retval) {
1279                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1280                 goto exit;
1281         }
1282
1283         /*
1284          * Initialize configuration work.
1285          */
1286         INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
1287         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1288         INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled);
1289         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1290
1291         /*
1292          * Reset current working type.
1293          */
1294         rt2x00dev->interface.type = IEEE80211_IF_TYPE_INVALID;
1295
1296         /*
1297          * Allocate ring array.
1298          */
1299         retval = rt2x00lib_alloc_rings(rt2x00dev);
1300         if (retval)
1301                 goto exit;
1302
1303         /*
1304          * Initialize ieee80211 structure.
1305          */
1306         retval = rt2x00lib_probe_hw(rt2x00dev);
1307         if (retval) {
1308                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1309                 goto exit;
1310         }
1311
1312         /*
1313          * Allocatie rfkill.
1314          */
1315         retval = rt2x00rfkill_allocate(rt2x00dev);
1316         if (retval)
1317                 goto exit;
1318
1319         /*
1320          * Open the debugfs entry.
1321          */
1322         rt2x00debug_register(rt2x00dev);
1323
1324         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1325
1326         return 0;
1327
1328 exit:
1329         rt2x00lib_remove_dev(rt2x00dev);
1330
1331         return retval;
1332 }
1333 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1334
1335 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1336 {
1337         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1338
1339         /*
1340          * Disable radio.
1341          */
1342         rt2x00lib_disable_radio(rt2x00dev);
1343
1344         /*
1345          * Uninitialize device.
1346          */
1347         rt2x00lib_uninitialize(rt2x00dev);
1348
1349         /*
1350          * Close debugfs entry.
1351          */
1352         rt2x00debug_deregister(rt2x00dev);
1353
1354         /*
1355          * Free rfkill
1356          */
1357         rt2x00rfkill_free(rt2x00dev);
1358
1359         /*
1360          * Free ieee80211_hw memory.
1361          */
1362         rt2x00lib_remove_hw(rt2x00dev);
1363
1364         /*
1365          * Free firmware image.
1366          */
1367         rt2x00lib_free_firmware(rt2x00dev);
1368
1369         /*
1370          * Free ring structures.
1371          */
1372         rt2x00lib_free_rings(rt2x00dev);
1373 }
1374 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1375
1376 /*
1377  * Device state handlers
1378  */
1379 #ifdef CONFIG_PM
1380 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1381 {
1382         int retval;
1383
1384         NOTICE(rt2x00dev, "Going to sleep.\n");
1385         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1386
1387         /*
1388          * Only continue if mac80211 has open interfaces.
1389          */
1390         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1391                 goto exit;
1392         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1393
1394         /*
1395          * Disable radio and unitialize all items
1396          * that must be recreated on resume.
1397          */
1398         rt2x00lib_stop(rt2x00dev);
1399         rt2x00lib_uninitialize(rt2x00dev);
1400         rt2x00debug_deregister(rt2x00dev);
1401
1402 exit:
1403         /*
1404          * Set device mode to sleep for power management.
1405          */
1406         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1407         if (retval)
1408                 return retval;
1409
1410         return 0;
1411 }
1412 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1413
1414 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1415 {
1416         struct interface *intf = &rt2x00dev->interface;
1417         int retval;
1418
1419         NOTICE(rt2x00dev, "Waking up.\n");
1420
1421         /*
1422          * Open the debugfs entry.
1423          */
1424         rt2x00debug_register(rt2x00dev);
1425
1426         /*
1427          * Only continue if mac80211 had open interfaces.
1428          */
1429         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1430                 return 0;
1431
1432         /*
1433          * Reinitialize device and all active interfaces.
1434          */
1435         retval = rt2x00lib_start(rt2x00dev);
1436         if (retval)
1437                 goto exit;
1438
1439         /*
1440          * Reconfigure device.
1441          */
1442         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1443         if (!rt2x00dev->hw->conf.radio_enabled)
1444                 rt2x00lib_disable_radio(rt2x00dev);
1445
1446         rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
1447         rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
1448         rt2x00lib_config_type(rt2x00dev, intf->type);
1449
1450         /*
1451          * We are ready again to receive requests from mac80211.
1452          */
1453         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1454
1455         /*
1456          * It is possible that during that mac80211 has attempted
1457          * to send frames while we were suspending or resuming.
1458          * In that case we have disabled the TX queue and should
1459          * now enable it again
1460          */
1461         ieee80211_start_queues(rt2x00dev->hw);
1462
1463         /*
1464          * When in Master or Ad-hoc mode,
1465          * restart Beacon transmitting by faking a beacondone event.
1466          */
1467         if (intf->type == IEEE80211_IF_TYPE_AP ||
1468             intf->type == IEEE80211_IF_TYPE_IBSS)
1469                 rt2x00lib_beacondone(rt2x00dev);
1470
1471         return 0;
1472
1473 exit:
1474         rt2x00lib_disable_radio(rt2x00dev);
1475         rt2x00lib_uninitialize(rt2x00dev);
1476         rt2x00debug_deregister(rt2x00dev);
1477
1478         return retval;
1479 }
1480 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1481 #endif /* CONFIG_PM */
1482
1483 /*
1484  * rt2x00lib module information.
1485  */
1486 MODULE_AUTHOR(DRV_PROJECT);
1487 MODULE_VERSION(DRV_VERSION);
1488 MODULE_DESCRIPTION("rt2x00 library");
1489 MODULE_LICENSE("GPL");