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

   1 /*
   2         Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 /*
  27  * Set enviroment defines for rt2x00.h
  28  */
  29 #define DRV_NAME "rt2x00lib"
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33
  34 #include "rt2x00.h"
  35 #include "rt2x00lib.h"
  36
  37 /*
  38  * Ring handler.
  39  */
  40 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
  41                                      const unsigned int queue)
  42 {
  43         int beacon = test_bit(REQUIRE_BEACON_RING, &rt2x00dev->flags);
  44
  45         /*
  46          * Check if we are requesting a reqular TX ring,
  47          * or if we are requesting a Beacon or Atim ring.
  48          * For Atim rings, we should check if it is supported.
  49          */
  50         if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
  51                 return &rt2x00dev->tx[queue];
  52
  53         if (!rt2x00dev->bcn || !beacon)
  54                 return NULL;
  55
  56         if (queue == IEEE80211_TX_QUEUE_BEACON)
  57                 return &rt2x00dev->bcn[0];
  58         else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
  59                 return &rt2x00dev->bcn[1];
  60
  61         return NULL;
  62 }
  63 EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);
  64
  65 /*
  66  * Link tuning handlers
  67  */
  68 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
  69 {
  70         rt2x00_clear_link(&rt2x00dev->link);
  71
  72         /*
  73          * Reset the link tuner.
  74          */
  75         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  76
  77         queue_delayed_work(rt2x00dev->hw->workqueue,
  78                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  79 }
  80
  81 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  82 {
  83         if (delayed_work_pending(&rt2x00dev->link.work))
  84                 cancel_rearming_delayed_work(&rt2x00dev->link.work);
  85 }
  86
  87 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
  88 {
  89         rt2x00lib_stop_link_tuner(rt2x00dev);
  90         rt2x00lib_start_link_tuner(rt2x00dev);
  91 }
  92
  93 /*
  94  * Radio control handlers.
  95  */
  96 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  97 {
  98         int status;
  99
 100         /*
 101          * Don't enable the radio twice.
 102          * And check if the hardware button has been disabled.
 103          */
 104         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
 105             (test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags) &&
 106              !test_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags)))
 107                 return 0;
 108
 109         /*
 110          * Enable radio.
 111          */
 112         status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 113                                                        STATE_RADIO_ON);
 114         if (status)
 115                 return status;
 116
 117         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 118
 119         /*
 120          * Enable RX.
 121          */
 122         rt2x00lib_toggle_rx(rt2x00dev, 1);
 123
 124         /*
 125          * Start the TX queues.
 126          */
 127         ieee80211_start_queues(rt2x00dev->hw);
 128
 129         return 0;
 130 }
 131
 132 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 133 {
 134         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 135                 return;
 136
 137         /*
 138          * Stop all scheduled work.
 139          */
 140         if (work_pending(&rt2x00dev->beacon_work))
 141                 cancel_work_sync(&rt2x00dev->beacon_work);
 142         if (work_pending(&rt2x00dev->filter_work))
 143                 cancel_work_sync(&rt2x00dev->filter_work);
 144
 145         /*
 146          * Stop the TX queues.
 147          */
 148         ieee80211_stop_queues(rt2x00dev->hw);
 149
 150         /*
 151          * Disable RX.
 152          */
 153         rt2x00lib_toggle_rx(rt2x00dev, 0);
 154
 155         /*
 156          * Disable radio.
 157          */
 158         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 159 }
 160
 161 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, int enable)
 162 {
 163         enum dev_state state = enable ? STATE_RADIO_RX_ON : STATE_RADIO_RX_OFF;
 164
 165         /*
 166          * When we are disabling the RX, we should also stop the link tuner.
 167          */
 168         if (!enable)
 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 (enable && is_interface_present(&rt2x00dev->interface))
 177                 rt2x00lib_start_link_tuner(rt2x00dev);
 178 }
 179
 180 static void rt2x00lib_precalculate_link_signal(struct link *link)
 181 {
 182         if (link->rx_failed || link->rx_success)
 183                 link->rx_percentage =
 184                     (link->rx_success * 100) /
 185                     (link->rx_failed + link->rx_success);
 186         else
 187                 link->rx_percentage = 50;
 188
 189         if (link->tx_failed || link->tx_success)
 190                 link->tx_percentage =
 191                     (link->tx_success * 100) /
 192                     (link->tx_failed + link->tx_success);
 193         else
 194                 link->tx_percentage = 50;
 195
 196         link->rx_success = 0;
 197         link->rx_failed = 0;
 198         link->tx_success = 0;
 199         link->tx_failed = 0;
 200 }
 201
 202 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 203                                            int rssi)
 204 {
 205         int rssi_percentage = 0;
 206         int signal;
 207
 208         /*
 209          * We need a positive value for the RSSI.
 210          */
 211         if (rssi < 0)
 212                 rssi += rt2x00dev->rssi_offset;
 213
 214         /*
 215          * Calculate the different percentages,
 216          * which will be used for the signal.
 217          */
 218         if (rt2x00dev->rssi_offset)
 219                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 220
 221         /*
 222          * Add the individual percentages and use the WEIGHT
 223          * defines to calculate the current link signal.
 224          */
 225         signal = ((WEIGHT_RSSI * rssi_percentage) +
 226                   (WEIGHT_TX * rt2x00dev->link.tx_percentage) +
 227                   (WEIGHT_RX * rt2x00dev->link.rx_percentage)) / 100;
 228
 229         return (signal > 100) ? 100 : signal;
 230 }
 231
 232 static void rt2x00lib_link_tuner(struct work_struct *work)
 233 {
 234         struct rt2x00_dev *rt2x00dev =
 235             container_of(work, struct rt2x00_dev, link.work.work);
 236
 237         /*
 238          * Update statistics.
 239          */
 240         rt2x00dev->ops->lib->link_stats(rt2x00dev);
 241
 242         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 243             rt2x00dev->link.rx_failed;
 244
 245         rt2x00lib_precalculate_link_signal(&rt2x00dev->link);
 246
 247         /*
 248          * Only perform the link tuning when Link tuning
 249          * has been enabled (This could have been disabled from the EEPROM).
 250          */
 251         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 252                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 253
 254         /*
 255          * Increase tuner counter, and reschedule the next link tuner run.
 256          */
 257         rt2x00dev->link.count++;
 258         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 259                            LINK_TUNE_INTERVAL);
 260 }
 261
 262 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 263 {
 264         struct rt2x00_dev *rt2x00dev =
 265             container_of(work, struct rt2x00_dev, filter_work);
 266
 267         rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
 268                                              rt2x00dev->interface.filter,
 269                                              &rt2x00dev->interface.filter,
 270                                              0, NULL);
 271 }
 272
 273 /*
 274  * Interrupt context handlers.
 275  */
 276 static void rt2x00lib_beacondone_scheduled(struct work_struct *work)
 277 {
 278         struct rt2x00_dev *rt2x00dev =
 279             container_of(work, struct rt2x00_dev, beacon_work);
 280         struct data_ring *ring =
 281             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
 282         struct data_entry *entry = rt2x00_get_data_entry(ring);
 283         struct sk_buff *skb;
 284
 285         skb = ieee80211_beacon_get(rt2x00dev->hw,
 286                                    rt2x00dev->interface.id,
 287                                    &entry->tx_status.control);
 288         if (!skb)
 289                 return;
 290
 291         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 292                                           &entry->tx_status.control);
 293
 294         dev_kfree_skb(skb);
 295 }
 296
 297 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 298 {
 299         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 300                 return;
 301
 302         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
 303 }
 304 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 305
 306 void rt2x00lib_txdone(struct data_entry *entry,
 307                       const int status, const int retry)
 308 {
 309         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 310         struct ieee80211_tx_status *tx_status = &entry->tx_status;
 311         struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
 312         int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
 313         int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
 314                       status == TX_FAIL_OTHER);
 315
 316         /*
 317          * Update TX statistics.
 318          */
 319         tx_status->flags = 0;
 320         tx_status->ack_signal = 0;
 321         tx_status->excessive_retries = (status == TX_FAIL_RETRY);
 322         tx_status->retry_count = retry;
 323         rt2x00dev->link.tx_success += success;
 324         rt2x00dev->link.tx_failed += retry + fail;
 325
 326         if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
 327                 if (success)
 328                         tx_status->flags |= IEEE80211_TX_STATUS_ACK;
 329                 else
 330                         stats->dot11ACKFailureCount++;
 331         }
 332
 333         tx_status->queue_length = entry->ring->stats.limit;
 334         tx_status->queue_number = tx_status->control.queue;
 335
 336         if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 337                 if (success)
 338                         stats->dot11RTSSuccessCount++;
 339                 else
 340                         stats->dot11RTSFailureCount++;
 341         }
 342
 343         /*
 344          * Send the tx_status to mac80211,
 345          * that method also cleans up the skb structure.
 346          */
 347         ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
 348         entry->skb = NULL;
 349 }
 350 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 351
 352 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 353                       struct rxdata_entry_desc *desc)
 354 {
 355         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 356         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 357         struct ieee80211_hw_mode *mode;
 358         struct ieee80211_rate *rate;
 359         unsigned int i;
 360         int val = 0;
 361
 362         /*
 363          * Update RX statistics.
 364          */
 365         mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
 366         for (i = 0; i < mode->num_rates; i++) {
 367                 rate = &mode->rates[i];
 368
 369                 /*
 370                  * When frame was received with an OFDM bitrate,
 371                  * the signal is the PLCP value. If it was received with
 372                  * a CCK bitrate the signal is the rate in 0.5kbit/s.
 373                  */
 374                 if (!desc->ofdm)
 375                         val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
 376                 else
 377                         val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
 378
 379                 if (val == desc->signal) {
 380                         val = rate->val;
 381                         break;
 382                 }
 383         }
 384
 385         rt2x00_update_link_rssi(&rt2x00dev->link, desc->rssi);
 386         rt2x00dev->link.rx_success++;
 387         rx_status->rate = val;
 388         rx_status->signal =
 389             rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
 390         rx_status->ssi = desc->rssi;
 391         rx_status->flag = desc->flags;
 392
 393         /*
 394          * Send frame to mac80211
 395          */
 396         ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
 397 }
 398 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 399
 400 /*
 401  * TX descriptor initializer
 402  */
 403 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 404                              struct data_desc *txd,
 405                              struct ieee80211_hdr *ieee80211hdr,
 406                              unsigned int length,
 407                              struct ieee80211_tx_control *control)
 408 {
 409         struct txdata_entry_desc desc;
 410         struct data_ring *ring;
 411         int tx_rate;
 412         int bitrate;
 413         int duration;
 414         int residual;
 415         u16 frame_control;
 416         u16 seq_ctrl;
 417
 418         /*
 419          * Make sure the descriptor is properly cleared.
 420          */
 421         memset(&desc, 0x00, sizeof(desc));
 422
 423         /*
 424          * Get ring pointer, if we fail to obtain the
 425          * correct ring, then use the first TX ring.
 426          */
 427         ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
 428         if (!ring)
 429                 ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
 430
 431         desc.cw_min = ring->tx_params.cw_min;
 432         desc.cw_max = ring->tx_params.cw_max;
 433         desc.aifs = ring->tx_params.aifs;
 434
 435         /*
 436          * Identify queue
 437          */
 438         if (control->queue < rt2x00dev->hw->queues)
 439                 desc.queue = control->queue;
 440         else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 441                  control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
 442                 desc.queue = QUEUE_MGMT;
 443         else
 444                 desc.queue = QUEUE_OTHER;
 445
 446         /*
 447          * Read required fields from ieee80211 header.
 448          */
 449         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
 450         seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
 451
 452         tx_rate = control->tx_rate;
 453
 454         /*
 455          * Check if this is a RTS/CTS frame
 456          */
 457         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 458                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 459                 if (is_rts_frame(frame_control))
 460                         __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
 461                 if (control->rts_cts_rate)
 462                         tx_rate = control->rts_cts_rate;
 463         }
 464
 465         /*
 466          * Check for OFDM
 467          */
 468         if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
 469                 __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
 470
 471         /*
 472          * Check if more fragments are pending
 473          */
 474         if (ieee80211_get_morefrag(ieee80211hdr)) {
 475                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 476                 __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
 477         }
 478
 479         /*
 480          * Beacons and probe responses require the tsf timestamp
 481          * to be inserted into the frame.
 482          */
 483         if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 484             is_probe_resp(frame_control))
 485                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
 486
 487         /*
 488          * Determine with what IFS priority this frame should be send.
 489          * Set ifs to IFS_SIFS when the this is not the first fragment,
 490          * or this fragment came after RTS/CTS.
 491          */
 492         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 493             test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
 494                 desc.ifs = IFS_SIFS;
 495         else
 496                 desc.ifs = IFS_BACKOFF;
 497
 498         /*
 499          * PLCP setup
 500          * Length calculation depends on OFDM/CCK rate.
 501          */
 502         desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
 503         desc.service = 0x04;
 504
 505         if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
 506                 desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
 507                 desc.length_low = ((length + FCS_LEN) & 0x3f);
 508         } else {
 509                 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
 510
 511                 /*
 512                  * Convert length to microseconds.
 513                  */
 514                 residual = get_duration_res(length + FCS_LEN, bitrate);
 515                 duration = get_duration(length + FCS_LEN, bitrate);
 516
 517                 if (residual != 0) {
 518                         duration++;
 519
 520                         /*
 521                          * Check if we need to set the Length Extension
 522                          */
 523                         if (bitrate == 110 && residual <= 3)
 524                                 desc.service |= 0x80;
 525                 }
 526
 527                 desc.length_high = (duration >> 8) & 0xff;
 528                 desc.length_low = duration & 0xff;
 529
 530                 /*
 531                  * When preamble is enabled we should set the
 532                  * preamble bit for the signal.
 533                  */
 534                 if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
 535                         desc.signal |= 0x08;
 536         }
 537
 538         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc,
 539                                            ieee80211hdr, length, control);
 540 }
 541 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 542
 543 /*
 544  * Driver initialization handlers.
 545  */
 546 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 547                               const int channel, const int tx_power,
 548                               const int value)
 549 {
 550         entry->chan = channel;
 551         if (channel <= 14)
 552                 entry->freq = 2407 + (5 * channel);
 553         else
 554                 entry->freq = 5000 + (5 * channel);
 555         entry->val = value;
 556         entry->flag =
 557             IEEE80211_CHAN_W_IBSS |
 558             IEEE80211_CHAN_W_ACTIVE_SCAN |
 559             IEEE80211_CHAN_W_SCAN;
 560         entry->power_level = tx_power;
 561         entry->antenna_max = 0xff;
 562 }
 563
 564 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 565                            const int rate, const int mask,
 566                            const int plcp, const int flags)
 567 {
 568         entry->rate = rate;
 569         entry->val =
 570             DEVICE_SET_RATE_FIELD(rate, RATE) |
 571             DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
 572             DEVICE_SET_RATE_FIELD(plcp, PLCP);
 573         entry->flags = flags;
 574         entry->val2 = entry->val;
 575         if (entry->flags & IEEE80211_RATE_PREAMBLE2)
 576                 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
 577         entry->min_rssi_ack = 0;
 578         entry->min_rssi_ack_delta = 0;
 579 }
 580
 581 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 582                                     struct hw_mode_spec *spec)
 583 {
 584         struct ieee80211_hw *hw = rt2x00dev->hw;
 585         struct ieee80211_hw_mode *hwmodes;
 586         struct ieee80211_channel *channels;
 587         struct ieee80211_rate *rates;
 588         unsigned int i;
 589         unsigned char tx_power;
 590
 591         hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
 592         if (!hwmodes)
 593                 goto exit;
 594
 595         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 596         if (!channels)
 597                 goto exit_free_modes;
 598
 599         rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
 600         if (!rates)
 601                 goto exit_free_channels;
 602
 603         /*
 604          * Initialize Rate list.
 605          */
 606         rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
 607                        0x00, IEEE80211_RATE_CCK);
 608         rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
 609                        0x01, IEEE80211_RATE_CCK_2);
 610         rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
 611                        0x02, IEEE80211_RATE_CCK_2);
 612         rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
 613                        0x03, IEEE80211_RATE_CCK_2);
 614
 615         if (spec->num_rates > 4) {
 616                 rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
 617                                0x0b, IEEE80211_RATE_OFDM);
 618                 rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
 619                                0x0f, IEEE80211_RATE_OFDM);
 620                 rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
 621                                0x0a, IEEE80211_RATE_OFDM);
 622                 rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
 623                                0x0e, IEEE80211_RATE_OFDM);
 624                 rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
 625                                0x09, IEEE80211_RATE_OFDM);
 626                 rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
 627                                0x0d, IEEE80211_RATE_OFDM);
 628                 rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
 629                                0x08, IEEE80211_RATE_OFDM);
 630                 rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
 631                                0x0c, IEEE80211_RATE_OFDM);
 632         }
 633
 634         /*
 635          * Initialize Channel list.
 636          */
 637         for (i = 0; i < spec->num_channels; i++) {
 638                 if (spec->channels[i].channel <= 14)
 639                         tx_power = spec->tx_power_bg[i];
 640                 else if (spec->tx_power_a)
 641                         tx_power = spec->tx_power_a[i];
 642                 else
 643                         tx_power = spec->tx_power_default;
 644
 645                 rt2x00lib_channel(&channels[i],
 646                                   spec->channels[i].channel, tx_power, i);
 647         }
 648
 649         /*
 650          * Intitialize 802.11b
 651          * Rates: CCK.
 652          * Channels: OFDM.
 653          */
 654         if (spec->num_modes > HWMODE_B) {
 655                 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
 656                 hwmodes[HWMODE_B].num_channels = 14;
 657                 hwmodes[HWMODE_B].num_rates = 4;
 658                 hwmodes[HWMODE_B].channels = channels;
 659                 hwmodes[HWMODE_B].rates = rates;
 660         }
 661
 662         /*
 663          * Intitialize 802.11g
 664          * Rates: CCK, OFDM.
 665          * Channels: OFDM.
 666          */
 667         if (spec->num_modes > HWMODE_G) {
 668                 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
 669                 hwmodes[HWMODE_G].num_channels = 14;
 670                 hwmodes[HWMODE_G].num_rates = spec->num_rates;
 671                 hwmodes[HWMODE_G].channels = channels;
 672                 hwmodes[HWMODE_G].rates = rates;
 673         }
 674
 675         /*
 676          * Intitialize 802.11a
 677          * Rates: OFDM.
 678          * Channels: OFDM, UNII, HiperLAN2.
 679          */
 680         if (spec->num_modes > HWMODE_A) {
 681                 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
 682                 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
 683                 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
 684                 hwmodes[HWMODE_A].channels = &channels[14];
 685                 hwmodes[HWMODE_A].rates = &rates[4];
 686         }
 687
 688         if (spec->num_modes > HWMODE_G &&
 689             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
 690                 goto exit_free_rates;
 691
 692         if (spec->num_modes > HWMODE_B &&
 693             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
 694                 goto exit_free_rates;
 695
 696         if (spec->num_modes > HWMODE_A &&
 697             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
 698                 goto exit_free_rates;
 699
 700         rt2x00dev->hwmodes = hwmodes;
 701
 702         return 0;
 703
 704 exit_free_rates:
 705         kfree(rates);
 706
 707 exit_free_channels:
 708         kfree(channels);
 709
 710 exit_free_modes:
 711         kfree(hwmodes);
 712
 713 exit:
 714         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 715         return -ENOMEM;
 716 }
 717
 718 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 719 {
 720         if (test_bit(DEVICE_INITIALIZED_HW, &rt2x00dev->flags))
 721                 ieee80211_unregister_hw(rt2x00dev->hw);
 722
 723         if (likely(rt2x00dev->hwmodes)) {
 724                 kfree(rt2x00dev->hwmodes->channels);
 725                 kfree(rt2x00dev->hwmodes->rates);
 726                 kfree(rt2x00dev->hwmodes);
 727                 rt2x00dev->hwmodes = NULL;
 728         }
 729 }
 730
 731 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 732 {
 733         struct hw_mode_spec *spec = &rt2x00dev->spec;
 734         int status;
 735
 736         /*
 737          * Initialize HW modes.
 738          */
 739         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 740         if (status)
 741                 return status;
 742
 743         /*
 744          * Register HW.
 745          */
 746         status = ieee80211_register_hw(rt2x00dev->hw);
 747         if (status) {
 748                 rt2x00lib_remove_hw(rt2x00dev);
 749                 return status;
 750         }
 751
 752         __set_bit(DEVICE_INITIALIZED_HW, &rt2x00dev->flags);
 753
 754         return 0;
 755 }
 756
 757 /*
 758  * Initialization/uninitialization handlers.
 759  */
 760 static int rt2x00lib_alloc_entries(struct data_ring *ring,
 761                                    const u16 max_entries, const u16 data_size,
 762                                    const u16 desc_size)
 763 {
 764         struct data_entry *entry;
 765         unsigned int i;
 766
 767         ring->stats.limit = max_entries;
 768         ring->data_size = data_size;
 769         ring->desc_size = desc_size;
 770
 771         /*
 772          * Allocate all ring entries.
 773          */
 774         entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
 775         if (!entry)
 776                 return -ENOMEM;
 777
 778         for (i = 0; i < ring->stats.limit; i++) {
 779                 entry[i].flags = 0;
 780                 entry[i].ring = ring;
 781                 entry[i].skb = NULL;
 782         }
 783
 784         ring->entry = entry;
 785
 786         return 0;
 787 }
 788
 789 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
 790 {
 791         struct data_ring *ring;
 792
 793         /*
 794          * Allocate the RX ring.
 795          */
 796         if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
 797                                     rt2x00dev->ops->rxd_size))
 798                 return -ENOMEM;
 799
 800         /*
 801          * First allocate the TX rings.
 802          */
 803         txring_for_each(rt2x00dev, ring) {
 804                 if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
 805                                             rt2x00dev->ops->txd_size))
 806                         return -ENOMEM;
 807         }
 808
 809         if (!test_bit(REQUIRE_BEACON_RING, &rt2x00dev->flags))
 810                 return 0;
 811
 812         /*
 813          * Allocate the BEACON ring.
 814          */
 815         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
 816                                     MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
 817                 return -ENOMEM;
 818
 819         /*
 820          * Allocate the Atim ring.
 821          */
 822         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
 823                                     DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
 824                 return -ENOMEM;
 825
 826         return 0;
 827 }
 828
 829 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
 830 {
 831         struct data_ring *ring;
 832
 833         ring_for_each(rt2x00dev, ring) {
 834                 kfree(ring->entry);
 835                 ring->entry = NULL;
 836         }
 837 }
 838
 839 void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 840 {
 841         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 842                 return;
 843
 844         /*
 845          * Unregister rfkill.
 846          */
 847         rt2x00rfkill_unregister(rt2x00dev);
 848
 849         /*
 850          * Allow the HW to uninitialize.
 851          */
 852         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 853
 854         /*
 855          * Free allocated ring entries.
 856          */
 857         rt2x00lib_free_ring_entries(rt2x00dev);
 858 }
 859
 860 int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 861 {
 862         int status;
 863
 864         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 865                 return 0;
 866
 867         /*
 868          * Allocate all ring entries.
 869          */
 870         status = rt2x00lib_alloc_ring_entries(rt2x00dev);
 871         if (status) {
 872                 ERROR(rt2x00dev, "Ring entries allocation failed.\n");
 873                 return status;
 874         }
 875
 876         /*
 877          * Initialize the device.
 878          */
 879         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 880         if (status)
 881                 goto exit;
 882
 883         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
 884
 885         /*
 886          * Register the rfkill handler.
 887          */
 888         status = rt2x00rfkill_register(rt2x00dev);
 889         if (status)
 890                 goto exit_unitialize;
 891
 892         return 0;
 893
 894 exit_unitialize:
 895         rt2x00lib_uninitialize(rt2x00dev);
 896
 897 exit:
 898         rt2x00lib_free_ring_entries(rt2x00dev);
 899
 900         return status;
 901 }
 902
 903 /*
 904  * driver allocation handlers.
 905  */
 906 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
 907 {
 908         struct data_ring *ring;
 909
 910         /*
 911          * We need the following rings:
 912          * RX: 1
 913          * TX: hw->queues
 914          * Beacon: 1 (if required)
 915          * Atim: 1 (if required)
 916          */
 917         rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
 918             (2 * test_bit(REQUIRE_BEACON_RING, &rt2x00dev->flags));
 919
 920         ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
 921         if (!ring) {
 922                 ERROR(rt2x00dev, "Ring allocation failed.\n");
 923                 return -ENOMEM;
 924         }
 925
 926         /*
 927          * Initialize pointers
 928          */
 929         rt2x00dev->rx = ring;
 930         rt2x00dev->tx = &rt2x00dev->rx[1];
 931         if (test_bit(REQUIRE_BEACON_RING, &rt2x00dev->flags))
 932                 rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
 933
 934         /*
 935          * Initialize ring parameters.
 936          * cw_min: 2^5 = 32.
 937          * cw_max: 2^10 = 1024.
 938          */
 939         ring_for_each(rt2x00dev, ring) {
 940                 ring->rt2x00dev = rt2x00dev;
 941                 ring->tx_params.aifs = 2;
 942                 ring->tx_params.cw_min = 5;
 943                 ring->tx_params.cw_max = 10;
 944         }
 945
 946         return 0;
 947 }
 948
 949 static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
 950 {
 951         kfree(rt2x00dev->rx);
 952         rt2x00dev->rx = NULL;
 953         rt2x00dev->tx = NULL;
 954         rt2x00dev->bcn = NULL;
 955 }
 956
 957 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 958 {
 959         int retval = -ENOMEM;
 960
 961         /*
 962          * Let the driver probe the device to detect the capabilities.
 963          */
 964         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
 965         if (retval) {
 966                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 967                 goto exit;
 968         }
 969
 970         /*
 971          * Initialize configuration work.
 972          */
 973         INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
 974         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
 975         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
 976
 977         /*
 978          * Reset current working type.
 979          */
 980         rt2x00dev->interface.type = INVALID_INTERFACE;
 981
 982         /*
 983          * Allocate ring array.
 984          */
 985         retval = rt2x00lib_alloc_rings(rt2x00dev);
 986         if (retval)
 987                 goto exit;
 988
 989         /*
 990          * Initialize ieee80211 structure.
 991          */
 992         retval = rt2x00lib_probe_hw(rt2x00dev);
 993         if (retval) {
 994                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
 995                 goto exit;
 996         }
 997
 998         /*
 999          * Allocatie rfkill.
1000          */
1001         retval = rt2x00rfkill_allocate(rt2x00dev);
1002         if (retval)
1003                 goto exit;
1004
1005         /*
1006          * Open the debugfs entry.
1007          */
1008         rt2x00debug_register(rt2x00dev);
1009
1010         return 0;
1011
1012 exit:
1013         rt2x00lib_remove_dev(rt2x00dev);
1014
1015         return retval;
1016 }
1017 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1018
1019 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1020 {
1021         /*
1022          * Disable radio.
1023          */
1024         rt2x00lib_disable_radio(rt2x00dev);
1025
1026         /*
1027          * Uninitialize device.
1028          */
1029         rt2x00lib_uninitialize(rt2x00dev);
1030
1031         /*
1032          * Close debugfs entry.
1033          */
1034         rt2x00debug_deregister(rt2x00dev);
1035
1036         /*
1037          * Free rfkill
1038          */
1039         rt2x00rfkill_free(rt2x00dev);
1040
1041         /*
1042          * Free ieee80211_hw memory.
1043          */
1044         rt2x00lib_remove_hw(rt2x00dev);
1045
1046         /*
1047          * Free firmware image.
1048          */
1049         rt2x00lib_free_firmware(rt2x00dev);
1050
1051         /*
1052          * Free ring structures.
1053          */
1054         rt2x00lib_free_rings(rt2x00dev);
1055 }
1056 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1057
1058 /*
1059  * Device state handlers
1060  */
1061 #ifdef CONFIG_PM
1062 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1063 {
1064         int retval;
1065
1066         NOTICE(rt2x00dev, "Going to sleep.\n");
1067
1068         /*
1069          * Disable radio and unitialize all items
1070          * that must be recreated on resume.
1071          */
1072         rt2x00lib_disable_radio(rt2x00dev);
1073         rt2x00lib_uninitialize(rt2x00dev);
1074         rt2x00debug_deregister(rt2x00dev);
1075
1076         /*
1077          * Set device mode to sleep for power management.
1078          */
1079         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1080         if (retval)
1081                 return retval;
1082
1083         return 0;
1084 }
1085 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1086
1087 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1088 {
1089         struct interface *intf = &rt2x00dev->interface;
1090         int retval;
1091
1092         NOTICE(rt2x00dev, "Waking up.\n");
1093         __set_bit(INTERFACE_RESUME, &rt2x00dev->flags);
1094
1095         /*
1096          * Open the debugfs entry.
1097          */
1098         rt2x00debug_register(rt2x00dev);
1099
1100         /*
1101          * Reinitialize device and all active interfaces.
1102          */
1103         retval = rt2x00mac_start(rt2x00dev->hw);
1104         if (retval)
1105                 goto exit;
1106
1107         /*
1108          * Reconfigure device.
1109          */
1110         retval = rt2x00mac_config(rt2x00dev->hw, &rt2x00dev->hw->conf);
1111         if (retval)
1112                 goto exit;
1113
1114         rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
1115         rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
1116         rt2x00lib_config_type(rt2x00dev, intf->type);
1117
1118         /*
1119          * When in Master or Ad-hoc mode,
1120          * restart Beacon transmitting by faking a beacondone event.
1121          */
1122         if (intf->type == IEEE80211_IF_TYPE_AP ||
1123             intf->type == IEEE80211_IF_TYPE_IBSS)
1124                 rt2x00lib_beacondone(rt2x00dev);
1125
1126         __clear_bit(INTERFACE_RESUME, &rt2x00dev->flags);
1127
1128         return 0;
1129
1130 exit:
1131         rt2x00lib_disable_radio(rt2x00dev);
1132         rt2x00lib_uninitialize(rt2x00dev);
1133         rt2x00debug_deregister(rt2x00dev);
1134
1135         __clear_bit(INTERFACE_RESUME, &rt2x00dev->flags);
1136
1137         return retval;
1138 }
1139 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1140 #endif /* CONFIG_PM */
1141
1142 /*
1143  * rt2x00lib module information.
1144  */
1145 MODULE_AUTHOR(DRV_PROJECT);
1146 MODULE_VERSION(DRV_VERSION);
1147 MODULE_DESCRIPTION("rt2x00 library");
1148 MODULE_LICENSE("GPL");