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