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

   1 /*
   2         Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 /*
  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(DRIVER_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         rt2x00dev->link.count = 0;
  71         rt2x00dev->link.vgc_level = 0;
  72
  73         memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
  74
  75         /*
  76          * The RX and TX percentage should start at 50%
  77          * this will assure we will get at least get some
  78          * decent value when the link tuner starts.
  79          * The value will be dropped and overwritten with
  80          * the correct (measured )value anyway during the
  81          * first run of the link tuner.
  82          */
  83         rt2x00dev->link.qual.rx_percentage = 50;
  84         rt2x00dev->link.qual.tx_percentage = 50;
  85
  86         /*
  87          * Reset the link tuner.
  88          */
  89         rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
  90
  91         queue_delayed_work(rt2x00dev->hw->workqueue,
  92                            &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
  93 }
  94
  95 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
  96 {
  97         cancel_delayed_work_sync(&rt2x00dev->link.work);
  98 }
  99
 100 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
 101 {
 102         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 103                 return;
 104
 105         rt2x00lib_stop_link_tuner(rt2x00dev);
 106         rt2x00lib_start_link_tuner(rt2x00dev);
 107 }
 108
 109 /*
 110  * Radio control handlers.
 111  */
 112 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
 113 {
 114         int status;
 115
 116         /*
 117          * Don't enable the radio twice.
 118          * And check if the hardware button has been disabled.
 119          */
 120         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
 121             test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
 122                 return 0;
 123
 124         /*
 125          * Enable radio.
 126          */
 127         status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 128                                                        STATE_RADIO_ON);
 129         if (status)
 130                 return status;
 131
 132         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
 133
 134         /*
 135          * Enable RX.
 136          */
 137         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
 138
 139         /*
 140          * Start the TX queues.
 141          */
 142         ieee80211_start_queues(rt2x00dev->hw);
 143
 144         return 0;
 145 }
 146
 147 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 148 {
 149         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 150                 return;
 151
 152         /*
 153          * Stop all scheduled work.
 154          */
 155         if (work_pending(&rt2x00dev->beacon_work))
 156                 cancel_work_sync(&rt2x00dev->beacon_work);
 157         if (work_pending(&rt2x00dev->filter_work))
 158                 cancel_work_sync(&rt2x00dev->filter_work);
 159         if (work_pending(&rt2x00dev->config_work))
 160                 cancel_work_sync(&rt2x00dev->config_work);
 161
 162         /*
 163          * Stop the TX queues.
 164          */
 165         ieee80211_stop_queues(rt2x00dev->hw);
 166
 167         /*
 168          * Disable RX.
 169          */
 170         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
 171
 172         /*
 173          * Disable radio.
 174          */
 175         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 176 }
 177
 178 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 179 {
 180         /*
 181          * When we are disabling the RX, we should also stop the link tuner.
 182          */
 183         if (state == STATE_RADIO_RX_OFF)
 184                 rt2x00lib_stop_link_tuner(rt2x00dev);
 185
 186         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 187
 188         /*
 189          * When we are enabling the RX, we should also start the link tuner.
 190          */
 191         if (state == STATE_RADIO_RX_ON &&
 192             is_interface_present(&rt2x00dev->interface))
 193                 rt2x00lib_start_link_tuner(rt2x00dev);
 194 }
 195
 196 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
 197 {
 198         if (qual->rx_failed || qual->rx_success)
 199                 qual->rx_percentage =
 200                     (qual->rx_success * 100) /
 201                     (qual->rx_failed + qual->rx_success);
 202         else
 203                 qual->rx_percentage = 50;
 204
 205         if (qual->tx_failed || qual->tx_success)
 206                 qual->tx_percentage =
 207                     (qual->tx_success * 100) /
 208                     (qual->tx_failed + qual->tx_success);
 209         else
 210                 qual->tx_percentage = 50;
 211
 212         qual->rx_success = 0;
 213         qual->rx_failed = 0;
 214         qual->tx_success = 0;
 215         qual->tx_failed = 0;
 216 }
 217
 218 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
 219                                            int rssi)
 220 {
 221         int rssi_percentage = 0;
 222         int signal;
 223
 224         /*
 225          * We need a positive value for the RSSI.
 226          */
 227         if (rssi < 0)
 228                 rssi += rt2x00dev->rssi_offset;
 229
 230         /*
 231          * Calculate the different percentages,
 232          * which will be used for the signal.
 233          */
 234         if (rt2x00dev->rssi_offset)
 235                 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
 236
 237         /*
 238          * Add the individual percentages and use the WEIGHT
 239          * defines to calculate the current link signal.
 240          */
 241         signal = ((WEIGHT_RSSI * rssi_percentage) +
 242                   (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
 243                   (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
 244
 245         return (signal > 100) ? 100 : signal;
 246 }
 247
 248 static void rt2x00lib_link_tuner(struct work_struct *work)
 249 {
 250         struct rt2x00_dev *rt2x00dev =
 251             container_of(work, struct rt2x00_dev, link.work.work);
 252
 253         /*
 254          * When the radio is shutting down we should
 255          * immediately cease all link tuning.
 256          */
 257         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 258                 return;
 259
 260         /*
 261          * Update statistics.
 262          */
 263         rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
 264
 265         rt2x00dev->low_level_stats.dot11FCSErrorCount +=
 266             rt2x00dev->link.qual.rx_failed;
 267
 268         /*
 269          * Only perform the link tuning when Link tuning
 270          * has been enabled (This could have been disabled from the EEPROM).
 271          */
 272         if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 273                 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 274
 275         /*
 276          * Precalculate a portion of the link signal which is
 277          * in based on the tx/rx success/failure counters.
 278          */
 279         rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
 280
 281         /*
 282          * Increase tuner counter, and reschedule the next link tuner run.
 283          */
 284         rt2x00dev->link.count++;
 285         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 286                            LINK_TUNE_INTERVAL);
 287 }
 288
 289 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 290 {
 291         struct rt2x00_dev *rt2x00dev =
 292             container_of(work, struct rt2x00_dev, filter_work);
 293         unsigned int filter = rt2x00dev->interface.filter;
 294
 295         /*
 296          * Since we had stored the filter inside interface.filter,
 297          * we should now clear that field. Otherwise the driver will
 298          * assume nothing has changed (*total_flags will be compared
 299          * to interface.filter to determine if any action is required).
 300          */
 301         rt2x00dev->interface.filter = 0;
 302
 303         rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
 304                                              filter, &filter, 0, NULL);
 305 }
 306
 307 static void rt2x00lib_configuration_scheduled(struct work_struct *work)
 308 {
 309         struct rt2x00_dev *rt2x00dev =
 310             container_of(work, struct rt2x00_dev, config_work);
 311         int preamble = !test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
 312
 313         rt2x00mac_erp_ie_changed(rt2x00dev->hw,
 314                                  IEEE80211_ERP_CHANGE_PREAMBLE, 0, preamble);
 315 }
 316
 317 /*
 318  * Interrupt context handlers.
 319  */
 320 static void rt2x00lib_beacondone_scheduled(struct work_struct *work)
 321 {
 322         struct rt2x00_dev *rt2x00dev =
 323             container_of(work, struct rt2x00_dev, beacon_work);
 324         struct data_ring *ring =
 325             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
 326         struct data_entry *entry = rt2x00_get_data_entry(ring);
 327         struct sk_buff *skb;
 328
 329         skb = ieee80211_beacon_get(rt2x00dev->hw,
 330                                    rt2x00dev->interface.id,
 331                                    &entry->tx_status.control);
 332         if (!skb)
 333                 return;
 334
 335         rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
 336                                           &entry->tx_status.control);
 337
 338         dev_kfree_skb(skb);
 339 }
 340
 341 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 342 {
 343         if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
 344                 return;
 345
 346         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
 347 }
 348 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 349
 350 void rt2x00lib_txdone(struct data_entry *entry,
 351                       const int status, const int retry)
 352 {
 353         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 354         struct ieee80211_tx_status *tx_status = &entry->tx_status;
 355         struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
 356         int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
 357         int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
 358                       status == TX_FAIL_OTHER);
 359
 360         /*
 361          * Update TX statistics.
 362          */
 363         tx_status->flags = 0;
 364         tx_status->ack_signal = 0;
 365         tx_status->excessive_retries = (status == TX_FAIL_RETRY);
 366         tx_status->retry_count = retry;
 367         rt2x00dev->link.qual.tx_success += success;
 368         rt2x00dev->link.qual.tx_failed += retry + fail;
 369
 370         if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
 371                 if (success)
 372                         tx_status->flags |= IEEE80211_TX_STATUS_ACK;
 373                 else
 374                         stats->dot11ACKFailureCount++;
 375         }
 376
 377         tx_status->queue_length = entry->ring->stats.limit;
 378         tx_status->queue_number = tx_status->control.queue;
 379
 380         if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 381                 if (success)
 382                         stats->dot11RTSSuccessCount++;
 383                 else
 384                         stats->dot11RTSFailureCount++;
 385         }
 386
 387         /*
 388          * Send the tx_status to mac80211,
 389          * that method also cleans up the skb structure.
 390          */
 391         ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
 392         entry->skb = NULL;
 393 }
 394 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 395
 396 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 397                       struct rxdata_entry_desc *desc)
 398 {
 399         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 400         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 401         struct ieee80211_hw_mode *mode;
 402         struct ieee80211_rate *rate;
 403         unsigned int i;
 404         int val = 0;
 405
 406         /*
 407          * Update RX statistics.
 408          */
 409         mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
 410         for (i = 0; i < mode->num_rates; i++) {
 411                 rate = &mode->rates[i];
 412
 413                 /*
 414                  * When frame was received with an OFDM bitrate,
 415                  * the signal is the PLCP value. If it was received with
 416                  * a CCK bitrate the signal is the rate in 0.5kbit/s.
 417                  */
 418                 if (!desc->ofdm)
 419                         val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
 420                 else
 421                         val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
 422
 423                 if (val == desc->signal) {
 424                         val = rate->val;
 425                         break;
 426                 }
 427         }
 428
 429         rt2x00_update_link_rssi(&rt2x00dev->link, desc->rssi);
 430         rt2x00dev->link.qual.rx_success++;
 431         rx_status->rate = val;
 432         rx_status->signal =
 433             rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
 434         rx_status->ssi = desc->rssi;
 435         rx_status->flag = desc->flags;
 436         rx_status->antenna = rt2x00dev->link.active_ant.rx;
 437
 438         /*
 439          * Send frame to mac80211
 440          */
 441         ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
 442 }
 443 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 444
 445 /*
 446  * TX descriptor initializer
 447  */
 448 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 449                              struct data_desc *txd,
 450                              struct ieee80211_hdr *ieee80211hdr,
 451                              unsigned int length,
 452                              struct ieee80211_tx_control *control)
 453 {
 454         struct txdata_entry_desc desc;
 455         struct data_ring *ring;
 456         int tx_rate;
 457         int bitrate;
 458         int duration;
 459         int residual;
 460         u16 frame_control;
 461         u16 seq_ctrl;
 462
 463         /*
 464          * Make sure the descriptor is properly cleared.
 465          */
 466         memset(&desc, 0x00, sizeof(desc));
 467
 468         /*
 469          * Get ring pointer, if we fail to obtain the
 470          * correct ring, then use the first TX ring.
 471          */
 472         ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
 473         if (!ring)
 474                 ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
 475
 476         desc.cw_min = ring->tx_params.cw_min;
 477         desc.cw_max = ring->tx_params.cw_max;
 478         desc.aifs = ring->tx_params.aifs;
 479
 480         /*
 481          * Identify queue
 482          */
 483         if (control->queue < rt2x00dev->hw->queues)
 484                 desc.queue = control->queue;
 485         else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 486                  control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
 487                 desc.queue = QUEUE_MGMT;
 488         else
 489                 desc.queue = QUEUE_OTHER;
 490
 491         /*
 492          * Read required fields from ieee80211 header.
 493          */
 494         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
 495         seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
 496
 497         tx_rate = control->tx_rate;
 498
 499         /*
 500          * Check if this is a RTS/CTS frame
 501          */
 502         if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
 503                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 504                 if (is_rts_frame(frame_control))
 505                         __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
 506                 if (control->rts_cts_rate)
 507                         tx_rate = control->rts_cts_rate;
 508         }
 509
 510         /*
 511          * Check for OFDM
 512          */
 513         if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
 514                 __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
 515
 516         /*
 517          * Check if more fragments are pending
 518          */
 519         if (ieee80211_get_morefrag(ieee80211hdr)) {
 520                 __set_bit(ENTRY_TXD_BURST, &desc.flags);
 521                 __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
 522         }
 523
 524         /*
 525          * Beacons and probe responses require the tsf timestamp
 526          * to be inserted into the frame.
 527          */
 528         if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 529             is_probe_resp(frame_control))
 530                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
 531
 532         /*
 533          * Determine with what IFS priority this frame should be send.
 534          * Set ifs to IFS_SIFS when the this is not the first fragment,
 535          * or this fragment came after RTS/CTS.
 536          */
 537         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 538             test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
 539                 desc.ifs = IFS_SIFS;
 540         else
 541                 desc.ifs = IFS_BACKOFF;
 542
 543         /*
 544          * PLCP setup
 545          * Length calculation depends on OFDM/CCK rate.
 546          */
 547         desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
 548         desc.service = 0x04;
 549
 550         if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
 551                 desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
 552                 desc.length_low = ((length + FCS_LEN) & 0x3f);
 553         } else {
 554                 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
 555
 556                 /*
 557                  * Convert length to microseconds.
 558                  */
 559                 residual = get_duration_res(length + FCS_LEN, bitrate);
 560                 duration = get_duration(length + FCS_LEN, bitrate);
 561
 562                 if (residual != 0) {
 563                         duration++;
 564
 565                         /*
 566                          * Check if we need to set the Length Extension
 567                          */
 568                         if (bitrate == 110 && residual <= 30)
 569                                 desc.service |= 0x80;
 570                 }
 571
 572                 desc.length_high = (duration >> 8) & 0xff;
 573                 desc.length_low = duration & 0xff;
 574
 575                 /*
 576                  * When preamble is enabled we should set the
 577                  * preamble bit for the signal.
 578                  */
 579                 if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
 580                         desc.signal |= 0x08;
 581         }
 582
 583         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc,
 584                                            ieee80211hdr, length, control);
 585 }
 586 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
 587
 588 /*
 589  * Driver initialization handlers.
 590  */
 591 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 592                               const int channel, const int tx_power,
 593                               const int value)
 594 {
 595         entry->chan = channel;
 596         if (channel <= 14)
 597                 entry->freq = 2407 + (5 * channel);
 598         else
 599                 entry->freq = 5000 + (5 * channel);
 600         entry->val = value;
 601         entry->flag =
 602             IEEE80211_CHAN_W_IBSS |
 603             IEEE80211_CHAN_W_ACTIVE_SCAN |
 604             IEEE80211_CHAN_W_SCAN;
 605         entry->power_level = tx_power;
 606         entry->antenna_max = 0xff;
 607 }
 608
 609 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 610                            const int rate, const int mask,
 611                            const int plcp, const int flags)
 612 {
 613         entry->rate = rate;
 614         entry->val =
 615             DEVICE_SET_RATE_FIELD(rate, RATE) |
 616             DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
 617             DEVICE_SET_RATE_FIELD(plcp, PLCP);
 618         entry->flags = flags;
 619         entry->val2 = entry->val;
 620         if (entry->flags & IEEE80211_RATE_PREAMBLE2)
 621                 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
 622         entry->min_rssi_ack = 0;
 623         entry->min_rssi_ack_delta = 0;
 624 }
 625
 626 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 627                                     struct hw_mode_spec *spec)
 628 {
 629         struct ieee80211_hw *hw = rt2x00dev->hw;
 630         struct ieee80211_hw_mode *hwmodes;
 631         struct ieee80211_channel *channels;
 632         struct ieee80211_rate *rates;
 633         unsigned int i;
 634         unsigned char tx_power;
 635
 636         hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
 637         if (!hwmodes)
 638                 goto exit;
 639
 640         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 641         if (!channels)
 642                 goto exit_free_modes;
 643
 644         rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
 645         if (!rates)
 646                 goto exit_free_channels;
 647
 648         /*
 649          * Initialize Rate list.
 650          */
 651         rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
 652                        0x00, IEEE80211_RATE_CCK);
 653         rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
 654                        0x01, IEEE80211_RATE_CCK_2);
 655         rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
 656                        0x02, IEEE80211_RATE_CCK_2);
 657         rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
 658                        0x03, IEEE80211_RATE_CCK_2);
 659
 660         if (spec->num_rates > 4) {
 661                 rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
 662                                0x0b, IEEE80211_RATE_OFDM);
 663                 rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
 664                                0x0f, IEEE80211_RATE_OFDM);
 665                 rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
 666                                0x0a, IEEE80211_RATE_OFDM);
 667                 rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
 668                                0x0e, IEEE80211_RATE_OFDM);
 669                 rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
 670                                0x09, IEEE80211_RATE_OFDM);
 671                 rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
 672                                0x0d, IEEE80211_RATE_OFDM);
 673                 rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
 674                                0x08, IEEE80211_RATE_OFDM);
 675                 rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
 676                                0x0c, IEEE80211_RATE_OFDM);
 677         }
 678
 679         /*
 680          * Initialize Channel list.
 681          */
 682         for (i = 0; i < spec->num_channels; i++) {
 683                 if (spec->channels[i].channel <= 14)
 684                         tx_power = spec->tx_power_bg[i];
 685                 else if (spec->tx_power_a)
 686                         tx_power = spec->tx_power_a[i];
 687                 else
 688                         tx_power = spec->tx_power_default;
 689
 690                 rt2x00lib_channel(&channels[i],
 691                                   spec->channels[i].channel, tx_power, i);
 692         }
 693
 694         /*
 695          * Intitialize 802.11b
 696          * Rates: CCK.
 697          * Channels: OFDM.
 698          */
 699         if (spec->num_modes > HWMODE_B) {
 700                 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
 701                 hwmodes[HWMODE_B].num_channels = 14;
 702                 hwmodes[HWMODE_B].num_rates = 4;
 703                 hwmodes[HWMODE_B].channels = channels;
 704                 hwmodes[HWMODE_B].rates = rates;
 705         }
 706
 707         /*
 708          * Intitialize 802.11g
 709          * Rates: CCK, OFDM.
 710          * Channels: OFDM.
 711          */
 712         if (spec->num_modes > HWMODE_G) {
 713                 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
 714                 hwmodes[HWMODE_G].num_channels = 14;
 715                 hwmodes[HWMODE_G].num_rates = spec->num_rates;
 716                 hwmodes[HWMODE_G].channels = channels;
 717                 hwmodes[HWMODE_G].rates = rates;
 718         }
 719
 720         /*
 721          * Intitialize 802.11a
 722          * Rates: OFDM.
 723          * Channels: OFDM, UNII, HiperLAN2.
 724          */
 725         if (spec->num_modes > HWMODE_A) {
 726                 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
 727                 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
 728                 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
 729                 hwmodes[HWMODE_A].channels = &channels[14];
 730                 hwmodes[HWMODE_A].rates = &rates[4];
 731         }
 732
 733         if (spec->num_modes > HWMODE_G &&
 734             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
 735                 goto exit_free_rates;
 736
 737         if (spec->num_modes > HWMODE_B &&
 738             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
 739                 goto exit_free_rates;
 740
 741         if (spec->num_modes > HWMODE_A &&
 742             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
 743                 goto exit_free_rates;
 744
 745         rt2x00dev->hwmodes = hwmodes;
 746
 747         return 0;
 748
 749 exit_free_rates:
 750         kfree(rates);
 751
 752 exit_free_channels:
 753         kfree(channels);
 754
 755 exit_free_modes:
 756         kfree(hwmodes);
 757
 758 exit:
 759         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 760         return -ENOMEM;
 761 }
 762
 763 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 764 {
 765         if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
 766                 ieee80211_unregister_hw(rt2x00dev->hw);
 767
 768         if (likely(rt2x00dev->hwmodes)) {
 769                 kfree(rt2x00dev->hwmodes->channels);
 770                 kfree(rt2x00dev->hwmodes->rates);
 771                 kfree(rt2x00dev->hwmodes);
 772                 rt2x00dev->hwmodes = NULL;
 773         }
 774 }
 775
 776 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 777 {
 778         struct hw_mode_spec *spec = &rt2x00dev->spec;
 779         int status;
 780
 781         /*
 782          * Initialize HW modes.
 783          */
 784         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 785         if (status)
 786                 return status;
 787
 788         /*
 789          * Register HW.
 790          */
 791         status = ieee80211_register_hw(rt2x00dev->hw);
 792         if (status) {
 793                 rt2x00lib_remove_hw(rt2x00dev);
 794                 return status;
 795         }
 796
 797         __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
 798
 799         return 0;
 800 }
 801
 802 /*
 803  * Initialization/uninitialization handlers.
 804  */
 805 static int rt2x00lib_alloc_entries(struct data_ring *ring,
 806                                    const u16 max_entries, const u16 data_size,
 807                                    const u16 desc_size)
 808 {
 809         struct data_entry *entry;
 810         unsigned int i;
 811
 812         ring->stats.limit = max_entries;
 813         ring->data_size = data_size;
 814         ring->desc_size = desc_size;
 815
 816         /*
 817          * Allocate all ring entries.
 818          */
 819         entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
 820         if (!entry)
 821                 return -ENOMEM;
 822
 823         for (i = 0; i < ring->stats.limit; i++) {
 824                 entry[i].flags = 0;
 825                 entry[i].ring = ring;
 826                 entry[i].skb = NULL;
 827         }
 828
 829         ring->entry = entry;
 830
 831         return 0;
 832 }
 833
 834 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
 835 {
 836         struct data_ring *ring;
 837
 838         /*
 839          * Allocate the RX ring.
 840          */
 841         if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
 842                                     rt2x00dev->ops->rxd_size))
 843                 return -ENOMEM;
 844
 845         /*
 846          * First allocate the TX rings.
 847          */
 848         txring_for_each(rt2x00dev, ring) {
 849                 if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
 850                                             rt2x00dev->ops->txd_size))
 851                         return -ENOMEM;
 852         }
 853
 854         if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
 855                 return 0;
 856
 857         /*
 858          * Allocate the BEACON ring.
 859          */
 860         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
 861                                     MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
 862                 return -ENOMEM;
 863
 864         /*
 865          * Allocate the Atim ring.
 866          */
 867         if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
 868                                     DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
 869                 return -ENOMEM;
 870
 871         return 0;
 872 }
 873
 874 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
 875 {
 876         struct data_ring *ring;
 877
 878         ring_for_each(rt2x00dev, ring) {
 879                 kfree(ring->entry);
 880                 ring->entry = NULL;
 881         }
 882 }
 883
 884 void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 885 {
 886         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 887                 return;
 888
 889         /*
 890          * Unregister rfkill.
 891          */
 892         rt2x00rfkill_unregister(rt2x00dev);
 893
 894         /*
 895          * Allow the HW to uninitialize.
 896          */
 897         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 898
 899         /*
 900          * Free allocated ring entries.
 901          */
 902         rt2x00lib_free_ring_entries(rt2x00dev);
 903 }
 904
 905 int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 906 {
 907         int status;
 908
 909         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 910                 return 0;
 911
 912         /*
 913          * Allocate all ring entries.
 914          */
 915         status = rt2x00lib_alloc_ring_entries(rt2x00dev);
 916         if (status) {
 917                 ERROR(rt2x00dev, "Ring entries allocation failed.\n");
 918                 return status;
 919         }
 920
 921         /*
 922          * Initialize the device.
 923          */
 924         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 925         if (status)
 926                 goto exit;
 927
 928         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
 929
 930         /*
 931          * Register the rfkill handler.
 932          */
 933         status = rt2x00rfkill_register(rt2x00dev);
 934         if (status)
 935                 goto exit_unitialize;
 936
 937         return 0;
 938
 939 exit_unitialize:
 940         rt2x00lib_uninitialize(rt2x00dev);
 941
 942 exit:
 943         rt2x00lib_free_ring_entries(rt2x00dev);
 944
 945         return status;
 946 }
 947
 948 /*
 949  * driver allocation handlers.
 950  */
 951 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
 952 {
 953         struct data_ring *ring;
 954
 955         /*
 956          * We need the following rings:
 957          * RX: 1
 958          * TX: hw->queues
 959          * Beacon: 1 (if required)
 960          * Atim: 1 (if required)
 961          */
 962         rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
 963             (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags));
 964
 965         ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
 966         if (!ring) {
 967                 ERROR(rt2x00dev, "Ring allocation failed.\n");
 968                 return -ENOMEM;
 969         }
 970
 971         /*
 972          * Initialize pointers
 973          */
 974         rt2x00dev->rx = ring;
 975         rt2x00dev->tx = &rt2x00dev->rx[1];
 976         if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
 977                 rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
 978
 979         /*
 980          * Initialize ring parameters.
 981          * cw_min: 2^5 = 32.
 982          * cw_max: 2^10 = 1024.
 983          */
 984         ring_for_each(rt2x00dev, ring) {
 985                 ring->rt2x00dev = rt2x00dev;
 986                 ring->tx_params.aifs = 2;
 987                 ring->tx_params.cw_min = 5;
 988                 ring->tx_params.cw_max = 10;
 989         }
 990
 991         return 0;
 992 }
 993
 994 static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
 995 {
 996         kfree(rt2x00dev->rx);
 997         rt2x00dev->rx = NULL;
 998         rt2x00dev->tx = NULL;
 999         rt2x00dev->bcn = NULL;
1000 }
1001
1002 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1003 {
1004         int retval = -ENOMEM;
1005
1006         /*
1007          * Let the driver probe the device to detect the capabilities.
1008          */
1009         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1010         if (retval) {
1011                 ERROR(rt2x00dev, "Failed to allocate device.\n");
1012                 goto exit;
1013         }
1014
1015         /*
1016          * Initialize configuration work.
1017          */
1018         INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
1019         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1020         INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled);
1021         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1022
1023         /*
1024          * Reset current working type.
1025          */
1026         rt2x00dev->interface.type = INVALID_INTERFACE;
1027
1028         /*
1029          * Allocate ring array.
1030          */
1031         retval = rt2x00lib_alloc_rings(rt2x00dev);
1032         if (retval)
1033                 goto exit;
1034
1035         /*
1036          * Initialize ieee80211 structure.
1037          */
1038         retval = rt2x00lib_probe_hw(rt2x00dev);
1039         if (retval) {
1040                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1041                 goto exit;
1042         }
1043
1044         /*
1045          * Allocatie rfkill.
1046          */
1047         retval = rt2x00rfkill_allocate(rt2x00dev);
1048         if (retval)
1049                 goto exit;
1050
1051         /*
1052          * Open the debugfs entry.
1053          */
1054         rt2x00debug_register(rt2x00dev);
1055
1056         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1057
1058         return 0;
1059
1060 exit:
1061         rt2x00lib_remove_dev(rt2x00dev);
1062
1063         return retval;
1064 }
1065 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1066
1067 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1068 {
1069         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1070
1071         /*
1072          * Disable radio.
1073          */
1074         rt2x00lib_disable_radio(rt2x00dev);
1075
1076         /*
1077          * Uninitialize device.
1078          */
1079         rt2x00lib_uninitialize(rt2x00dev);
1080
1081         /*
1082          * Close debugfs entry.
1083          */
1084         rt2x00debug_deregister(rt2x00dev);
1085
1086         /*
1087          * Free rfkill
1088          */
1089         rt2x00rfkill_free(rt2x00dev);
1090
1091         /*
1092          * Free ieee80211_hw memory.
1093          */
1094         rt2x00lib_remove_hw(rt2x00dev);
1095
1096         /*
1097          * Free firmware image.
1098          */
1099         rt2x00lib_free_firmware(rt2x00dev);
1100
1101         /*
1102          * Free ring structures.
1103          */
1104         rt2x00lib_free_rings(rt2x00dev);
1105 }
1106 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1107
1108 /*
1109  * Device state handlers
1110  */
1111 #ifdef CONFIG_PM
1112 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1113 {
1114         int retval;
1115
1116         NOTICE(rt2x00dev, "Going to sleep.\n");
1117         __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1118
1119         /*
1120          * Only continue if mac80211 has open interfaces.
1121          */
1122         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1123                 goto exit;
1124         __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1125
1126         /*
1127          * Disable radio and unitialize all items
1128          * that must be recreated on resume.
1129          */
1130         rt2x00mac_stop(rt2x00dev->hw);
1131         rt2x00lib_uninitialize(rt2x00dev);
1132         rt2x00debug_deregister(rt2x00dev);
1133
1134 exit:
1135         /*
1136          * Set device mode to sleep for power management.
1137          */
1138         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1139         if (retval)
1140                 return retval;
1141
1142         return 0;
1143 }
1144 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1145
1146 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1147 {
1148         struct interface *intf = &rt2x00dev->interface;
1149         int retval;
1150
1151         NOTICE(rt2x00dev, "Waking up.\n");
1152         __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1153
1154         /*
1155          * Open the debugfs entry.
1156          */
1157         rt2x00debug_register(rt2x00dev);
1158
1159         /*
1160          * Only continue if mac80211 had open interfaces.
1161          */
1162         if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1163                 return 0;
1164
1165         /*
1166          * Reinitialize device and all active interfaces.
1167          */
1168         retval = rt2x00mac_start(rt2x00dev->hw);
1169         if (retval)
1170                 goto exit;
1171
1172         /*
1173          * Reconfigure device.
1174          */
1175         rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1176         if (!rt2x00dev->hw->conf.radio_enabled)
1177                 rt2x00lib_disable_radio(rt2x00dev);
1178
1179         rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
1180         rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
1181         rt2x00lib_config_type(rt2x00dev, intf->type);
1182
1183         /*
1184          * It is possible that during that mac80211 has attempted
1185          * to send frames while we were suspending or resuming.
1186          * In that case we have disabled the TX queue and should
1187          * now enable it again
1188          */
1189         ieee80211_start_queues(rt2x00dev->hw);
1190
1191         /*
1192          * When in Master or Ad-hoc mode,
1193          * restart Beacon transmitting by faking a beacondone event.
1194          */
1195         if (intf->type == IEEE80211_IF_TYPE_AP ||
1196             intf->type == IEEE80211_IF_TYPE_IBSS)
1197                 rt2x00lib_beacondone(rt2x00dev);
1198
1199         return 0;
1200
1201 exit:
1202         rt2x00lib_disable_radio(rt2x00dev);
1203         rt2x00lib_uninitialize(rt2x00dev);
1204         rt2x00debug_deregister(rt2x00dev);
1205
1206         return retval;
1207 }
1208 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1209 #endif /* CONFIG_PM */
1210
1211 /*
1212  * rt2x00lib module information.
1213  */
1214 MODULE_AUTHOR(DRV_PROJECT);
1215 MODULE_VERSION(DRV_VERSION);
1216 MODULE_DESCRIPTION("rt2x00 library");
1217 MODULE_LICENSE("GPL");