drivers/net/wireless/rt2x00/rt2x00dev.c

   1 /*
   2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31
  32 /*
  33  * Radio control handlers.
  34  */
  35 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  36 {
  37         int status;
  38
  39         /*
  40          * Don't enable the radio twice.
  41          * And check if the hardware button has been disabled.
  42          */
  43         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
  44                 return 0;
  45
  46         /*
  47          * Initialize all data queues.
  48          */
  49         rt2x00queue_init_queues(rt2x00dev);
  50
  51         /*
  52          * Enable radio.
  53          */
  54         status =
  55             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
  56         if (status)
  57                 return status;
  58
  59         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
  60
  61         rt2x00leds_led_radio(rt2x00dev, true);
  62         rt2x00led_led_activity(rt2x00dev, true);
  63
  64         set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
  65
  66         /*
  67          * Enable RX.
  68          */
  69         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
  70
  71         /*
  72          * Start the TX queues.
  73          */
  74         ieee80211_wake_queues(rt2x00dev->hw);
  75
  76         return 0;
  77 }
  78
  79 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
  80 {
  81         if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
  82                 return;
  83
  84         /*
  85          * Stop the TX queues in mac80211.
  86          */
  87         ieee80211_stop_queues(rt2x00dev->hw);
  88         rt2x00queue_stop_queues(rt2x00dev);
  89
  90         /*
  91          * Disable RX.
  92          */
  93         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
  94
  95         /*
  96          * Disable radio.
  97          */
  98         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
  99         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
 100         rt2x00led_led_activity(rt2x00dev, false);
 101         rt2x00leds_led_radio(rt2x00dev, false);
 102 }
 103
 104 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 105 {
 106         /*
 107          * When we are disabling the RX, we should also stop the link tuner.
 108          */
 109         if (state == STATE_RADIO_RX_OFF)
 110                 rt2x00link_stop_tuner(rt2x00dev);
 111
 112         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 113
 114         /*
 115          * When we are enabling the RX, we should also start the link tuner.
 116          */
 117         if (state == STATE_RADIO_RX_ON)
 118                 rt2x00link_start_tuner(rt2x00dev);
 119 }
 120
 121 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 122 {
 123         struct rt2x00_dev *rt2x00dev =
 124             container_of(work, struct rt2x00_dev, filter_work);
 125
 126         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 127 }
 128
 129 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 130                                           struct ieee80211_vif *vif)
 131 {
 132         struct rt2x00_dev *rt2x00dev = data;
 133         struct rt2x00_intf *intf = vif_to_intf(vif);
 134         struct ieee80211_bss_conf conf;
 135         int delayed_flags;
 136
 137         /*
 138          * Copy all data we need during this action under the protection
 139          * of a spinlock. Otherwise race conditions might occur which results
 140          * into an invalid configuration.
 141          */
 142         spin_lock(&intf->lock);
 143
 144         memcpy(&conf, &vif->bss_conf, sizeof(conf));
 145         delayed_flags = intf->delayed_flags;
 146         intf->delayed_flags = 0;
 147
 148         spin_unlock(&intf->lock);
 149
 150         /*
 151          * It is possible the radio was disabled while the work had been
 152          * scheduled. If that happens we should return here immediately,
 153          * note that in the spinlock protected area above the delayed_flags
 154          * have been cleared correctly.
 155          */
 156         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 157                 return;
 158
 159         if (delayed_flags & DELAYED_UPDATE_BEACON)
 160                 rt2x00queue_update_beacon(rt2x00dev, vif, true);
 161
 162         if (delayed_flags & DELAYED_CONFIG_ERP)
 163                 rt2x00lib_config_erp(rt2x00dev, intf, &conf);
 164
 165         if (delayed_flags & DELAYED_LED_ASSOC)
 166                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 167 }
 168
 169 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 170 {
 171         struct rt2x00_dev *rt2x00dev =
 172             container_of(work, struct rt2x00_dev, intf_work);
 173
 174         /*
 175          * Iterate over each interface and perform the
 176          * requested configurations.
 177          */
 178         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 179                                             rt2x00lib_intf_scheduled_iter,
 180                                             rt2x00dev);
 181 }
 182
 183 /*
 184  * Interrupt context handlers.
 185  */
 186 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 187                                       struct ieee80211_vif *vif)
 188 {
 189         struct rt2x00_intf *intf = vif_to_intf(vif);
 190
 191         if (vif->type != NL80211_IFTYPE_AP &&
 192             vif->type != NL80211_IFTYPE_ADHOC &&
 193             vif->type != NL80211_IFTYPE_MESH_POINT &&
 194             vif->type != NL80211_IFTYPE_WDS)
 195                 return;
 196
 197         spin_lock(&intf->lock);
 198         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 199         spin_unlock(&intf->lock);
 200 }
 201
 202 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 203 {
 204         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 205                 return;
 206
 207         ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
 208                                                    rt2x00lib_beacondone_iter,
 209                                                    rt2x00dev);
 210
 211         ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work);
 212 }
 213 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 214
 215 void rt2x00lib_txdone(struct queue_entry *entry,
 216                       struct txdone_entry_desc *txdesc)
 217 {
 218         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 219         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
 220         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 221         enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
 222         unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 223         u8 rate_idx, rate_flags, retry_rates;
 224         unsigned int i;
 225
 226         /*
 227          * Unmap the skb.
 228          */
 229         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 230
 231         /*
 232          * Remove L2 padding which was added during
 233          */
 234         if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
 235                 rt2x00queue_payload_align(entry->skb, true, header_length);
 236
 237         /*
 238          * If the IV/EIV data was stripped from the frame before it was
 239          * passed to the hardware, we should now reinsert it again because
 240          * mac80211 will expect the the same data to be present it the
 241          * frame as it was passed to us.
 242          */
 243         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 244                 rt2x00crypto_tx_insert_iv(entry->skb, header_length);
 245
 246         /*
 247          * Send frame to debugfs immediately, after this call is completed
 248          * we are going to overwrite the skb->cb array.
 249          */
 250         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
 251
 252         /*
 253          * Update TX statistics.
 254          */
 255         rt2x00dev->link.qual.tx_success +=
 256             test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 257             test_bit(TXDONE_UNKNOWN, &txdesc->flags);
 258         rt2x00dev->link.qual.tx_failed +=
 259             test_bit(TXDONE_FAILURE, &txdesc->flags);
 260
 261         rate_idx = skbdesc->tx_rate_idx;
 262         rate_flags = skbdesc->tx_rate_flags;
 263         retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?
 264             (txdesc->retry + 1) : 1;
 265
 266         /*
 267          * Initialize TX status
 268          */
 269         memset(&tx_info->status, 0, sizeof(tx_info->status));
 270         tx_info->status.ack_signal = 0;
 271
 272         /*
 273          * Frame was send with retries, hardware tried
 274          * different rates to send out the frame, at each
 275          * retry it lowered the rate 1 step.
 276          */
 277         for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {
 278                 tx_info->status.rates[i].idx = rate_idx - i;
 279                 tx_info->status.rates[i].flags = rate_flags;
 280                 tx_info->status.rates[i].count = 1;
 281         }
 282         if (i < (IEEE80211_TX_MAX_RATES -1))
 283                 tx_info->status.rates[i].idx = -1; /* terminate */
 284
 285         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 286                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 287                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
 288                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
 289                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 290                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 291         }
 292
 293         if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 294                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 295                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
 296                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 297                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 298                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 299         }
 300
 301         /*
 302          * Only send the status report to mac80211 when TX status was
 303          * requested by it. If this was a extra frame coming through
 304          * a mac80211 library call (RTS/CTS) then we should not send the
 305          * status report back.
 306          */
 307         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 308                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
 309         else
 310                 dev_kfree_skb_irq(entry->skb);
 311
 312         /*
 313          * Make this entry available for reuse.
 314          */
 315         entry->skb = NULL;
 316         entry->flags = 0;
 317
 318         rt2x00dev->ops->lib->clear_entry(entry);
 319
 320         clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 321         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 322
 323         /*
 324          * If the data queue was below the threshold before the txdone
 325          * handler we must make sure the packet queue in the mac80211 stack
 326          * is reenabled when the txdone handler has finished.
 327          */
 328         if (!rt2x00queue_threshold(entry->queue))
 329                 ieee80211_wake_queue(rt2x00dev->hw, qid);
 330 }
 331 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 332
 333 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
 334                                         struct rxdone_entry_desc *rxdesc)
 335 {
 336         struct ieee80211_supported_band *sband;
 337         const struct rt2x00_rate *rate;
 338         unsigned int i;
 339         int signal;
 340         int type;
 341
 342         /*
 343          * For non-HT rates the MCS value needs to contain the
 344          * actually used rate modulation (CCK or OFDM).
 345          */
 346         if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
 347                 signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal);
 348         else
 349                 signal = rxdesc->signal;
 350
 351         type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
 352
 353         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 354         for (i = 0; i < sband->n_bitrates; i++) {
 355                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 356
 357                 if (((type == RXDONE_SIGNAL_PLCP) &&
 358                      (rate->plcp == signal)) ||
 359                     ((type == RXDONE_SIGNAL_BITRATE) &&
 360                       (rate->bitrate == signal)) ||
 361                     ((type == RXDONE_SIGNAL_MCS) &&
 362                       (rate->mcs == signal))) {
 363                         return i;
 364                 }
 365         }
 366
 367         WARNING(rt2x00dev, "Frame received with unrecognized signal, "
 368                 "signal=0x%.4x, type=%d.\n", signal, type);
 369         return 0;
 370 }
 371
 372 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 373                       struct queue_entry *entry)
 374 {
 375         struct rxdone_entry_desc rxdesc;
 376         struct sk_buff *skb;
 377         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 378         unsigned int header_length;
 379         bool l2pad;
 380         int rate_idx;
 381         /*
 382          * Allocate a new sk_buffer. If no new buffer available, drop the
 383          * received frame and reuse the existing buffer.
 384          */
 385         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
 386         if (!skb)
 387                 return;
 388
 389         /*
 390          * Unmap the skb.
 391          */
 392         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 393
 394         /*
 395          * Extract the RXD details.
 396          */
 397         memset(&rxdesc, 0, sizeof(rxdesc));
 398         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
 399
 400         /* Trim buffer to correct size */
 401         skb_trim(entry->skb, rxdesc.size);
 402
 403         /*
 404          * The data behind the ieee80211 header must be
 405          * aligned on a 4 byte boundary.
 406          */
 407         header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 408         l2pad = !!(rxdesc.dev_flags & RXDONE_L2PAD);
 409
 410         /*
 411          * Hardware might have stripped the IV/EIV/ICV data,
 412          * in that case it is possible that the data was
 413          * provided seperately (through hardware descriptor)
 414          * in which case we should reinsert the data into the frame.
 415          */
 416         if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
 417             (rxdesc.flags & RX_FLAG_IV_STRIPPED))
 418                 rt2x00crypto_rx_insert_iv(entry->skb, l2pad, header_length,
 419                                           &rxdesc);
 420         else
 421                 rt2x00queue_payload_align(entry->skb, l2pad, header_length);
 422
 423         /*
 424          * Check if the frame was received using HT. In that case,
 425          * the rate is the MCS index and should be passed to mac80211
 426          * directly. Otherwise we need to translate the signal to
 427          * the correct bitrate index.
 428          */
 429         if (rxdesc.rate_mode == RATE_MODE_CCK ||
 430             rxdesc.rate_mode == RATE_MODE_OFDM) {
 431                 rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
 432         } else {
 433                 rxdesc.flags |= RX_FLAG_HT;
 434                 rate_idx = rxdesc.signal;
 435         }
 436
 437         /*
 438          * Update extra components
 439          */
 440         rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
 441         rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
 442
 443         rx_status->mactime = rxdesc.timestamp;
 444         rx_status->rate_idx = rate_idx;
 445         rx_status->qual = rt2x00link_calculate_signal(rt2x00dev, rxdesc.rssi);
 446         rx_status->signal = rxdesc.rssi;
 447         rx_status->noise = rxdesc.noise;
 448         rx_status->flag = rxdesc.flags;
 449         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 450
 451         /*
 452          * Send frame to mac80211 & debugfs.
 453          * mac80211 will clean up the skb structure.
 454          */
 455         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 456         memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
 457         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
 458
 459         /*
 460          * Replace the skb with the freshly allocated one.
 461          */
 462         entry->skb = skb;
 463         entry->flags = 0;
 464
 465         rt2x00dev->ops->lib->clear_entry(entry);
 466
 467         rt2x00queue_index_inc(entry->queue, Q_INDEX);
 468 }
 469 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 470
 471 /*
 472  * Driver initialization handlers.
 473  */
 474 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 475         {
 476                 .flags = DEV_RATE_CCK,
 477                 .bitrate = 10,
 478                 .ratemask = BIT(0),
 479                 .plcp = 0x00,
 480                 .mcs = RATE_MCS(RATE_MODE_CCK, 0),
 481         },
 482         {
 483                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 484                 .bitrate = 20,
 485                 .ratemask = BIT(1),
 486                 .plcp = 0x01,
 487                 .mcs = RATE_MCS(RATE_MODE_CCK, 1),
 488         },
 489         {
 490                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 491                 .bitrate = 55,
 492                 .ratemask = BIT(2),
 493                 .plcp = 0x02,
 494                 .mcs = RATE_MCS(RATE_MODE_CCK, 2),
 495         },
 496         {
 497                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 498                 .bitrate = 110,
 499                 .ratemask = BIT(3),
 500                 .plcp = 0x03,
 501                 .mcs = RATE_MCS(RATE_MODE_CCK, 3),
 502         },
 503         {
 504                 .flags = DEV_RATE_OFDM,
 505                 .bitrate = 60,
 506                 .ratemask = BIT(4),
 507                 .plcp = 0x0b,
 508                 .mcs = RATE_MCS(RATE_MODE_OFDM, 0),
 509         },
 510         {
 511                 .flags = DEV_RATE_OFDM,
 512                 .bitrate = 90,
 513                 .ratemask = BIT(5),
 514                 .plcp = 0x0f,
 515                 .mcs = RATE_MCS(RATE_MODE_OFDM, 1),
 516         },
 517         {
 518                 .flags = DEV_RATE_OFDM,
 519                 .bitrate = 120,
 520                 .ratemask = BIT(6),
 521                 .plcp = 0x0a,
 522                 .mcs = RATE_MCS(RATE_MODE_OFDM, 2),
 523         },
 524         {
 525                 .flags = DEV_RATE_OFDM,
 526                 .bitrate = 180,
 527                 .ratemask = BIT(7),
 528                 .plcp = 0x0e,
 529                 .mcs = RATE_MCS(RATE_MODE_OFDM, 3),
 530         },
 531         {
 532                 .flags = DEV_RATE_OFDM,
 533                 .bitrate = 240,
 534                 .ratemask = BIT(8),
 535                 .plcp = 0x09,
 536                 .mcs = RATE_MCS(RATE_MODE_OFDM, 4),
 537         },
 538         {
 539                 .flags = DEV_RATE_OFDM,
 540                 .bitrate = 360,
 541                 .ratemask = BIT(9),
 542                 .plcp = 0x0d,
 543                 .mcs = RATE_MCS(RATE_MODE_OFDM, 5),
 544         },
 545         {
 546                 .flags = DEV_RATE_OFDM,
 547                 .bitrate = 480,
 548                 .ratemask = BIT(10),
 549                 .plcp = 0x08,
 550                 .mcs = RATE_MCS(RATE_MODE_OFDM, 6),
 551         },
 552         {
 553                 .flags = DEV_RATE_OFDM,
 554                 .bitrate = 540,
 555                 .ratemask = BIT(11),
 556                 .plcp = 0x0c,
 557                 .mcs = RATE_MCS(RATE_MODE_OFDM, 7),
 558         },
 559 };
 560
 561 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 562                               const int channel, const int tx_power,
 563                               const int value)
 564 {
 565         entry->center_freq = ieee80211_channel_to_frequency(channel);
 566         entry->hw_value = value;
 567         entry->max_power = tx_power;
 568         entry->max_antenna_gain = 0xff;
 569 }
 570
 571 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 572                            const u16 index, const struct rt2x00_rate *rate)
 573 {
 574         entry->flags = 0;
 575         entry->bitrate = rate->bitrate;
 576         entry->hw_value =index;
 577         entry->hw_value_short = index;
 578
 579         if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
 580                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 581 }
 582
 583 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 584                                     struct hw_mode_spec *spec)
 585 {
 586         struct ieee80211_hw *hw = rt2x00dev->hw;
 587         struct ieee80211_channel *channels;
 588         struct ieee80211_rate *rates;
 589         unsigned int num_rates;
 590         unsigned int i;
 591
 592         num_rates = 0;
 593         if (spec->supported_rates & SUPPORT_RATE_CCK)
 594                 num_rates += 4;
 595         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 596                 num_rates += 8;
 597
 598         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 599         if (!channels)
 600                 return -ENOMEM;
 601
 602         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 603         if (!rates)
 604                 goto exit_free_channels;
 605
 606         /*
 607          * Initialize Rate list.
 608          */
 609         for (i = 0; i < num_rates; i++)
 610                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 611
 612         /*
 613          * Initialize Channel list.
 614          */
 615         for (i = 0; i < spec->num_channels; i++) {
 616                 rt2x00lib_channel(&channels[i],
 617                                   spec->channels[i].channel,
 618                                   spec->channels_info[i].tx_power1, i);
 619         }
 620
 621         /*
 622          * Intitialize 802.11b, 802.11g
 623          * Rates: CCK, OFDM.
 624          * Channels: 2.4 GHz
 625          */
 626         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 627                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 628                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 629                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 630                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 631                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 632                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 633                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap,
 634                        &spec->ht, sizeof(spec->ht));
 635         }
 636
 637         /*
 638          * Intitialize 802.11a
 639          * Rates: OFDM.
 640          * Channels: OFDM, UNII, HiperLAN2.
 641          */
 642         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 643                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 644                     spec->num_channels - 14;
 645                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 646                     num_rates - 4;
 647                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 648                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 649                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 650                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 651                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap,
 652                        &spec->ht, sizeof(spec->ht));
 653         }
 654
 655         return 0;
 656
 657  exit_free_channels:
 658         kfree(channels);
 659         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 660         return -ENOMEM;
 661 }
 662
 663 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 664 {
 665         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 666                 ieee80211_unregister_hw(rt2x00dev->hw);
 667
 668         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 669                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 670                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 671                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 672                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 673         }
 674
 675         kfree(rt2x00dev->spec.channels_info);
 676 }
 677
 678 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 679 {
 680         struct hw_mode_spec *spec = &rt2x00dev->spec;
 681         int status;
 682
 683         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 684                 return 0;
 685
 686         /*
 687          * Initialize HW modes.
 688          */
 689         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 690         if (status)
 691                 return status;
 692
 693         /*
 694          * Initialize HW fields.
 695          */
 696         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
 697
 698         /*
 699          * Register HW.
 700          */
 701         status = ieee80211_register_hw(rt2x00dev->hw);
 702         if (status)
 703                 return status;
 704
 705         set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
 706
 707         return 0;
 708 }
 709
 710 /*
 711  * Initialization/uninitialization handlers.
 712  */
 713 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 714 {
 715         if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 716                 return;
 717
 718         /*
 719          * Unregister extra components.
 720          */
 721         rt2x00rfkill_unregister(rt2x00dev);
 722
 723         /*
 724          * Allow the HW to uninitialize.
 725          */
 726         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 727
 728         /*
 729          * Free allocated queue entries.
 730          */
 731         rt2x00queue_uninitialize(rt2x00dev);
 732 }
 733
 734 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 735 {
 736         int status;
 737
 738         if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 739                 return 0;
 740
 741         /*
 742          * Allocate all queue entries.
 743          */
 744         status = rt2x00queue_initialize(rt2x00dev);
 745         if (status)
 746                 return status;
 747
 748         /*
 749          * Initialize the device.
 750          */
 751         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 752         if (status) {
 753                 rt2x00queue_uninitialize(rt2x00dev);
 754                 return status;
 755         }
 756
 757         set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
 758
 759         /*
 760          * Register the extra components.
 761          */
 762         rt2x00rfkill_register(rt2x00dev);
 763
 764         return 0;
 765 }
 766
 767 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
 768 {
 769         int retval;
 770
 771         if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 772                 return 0;
 773
 774         /*
 775          * If this is the first interface which is added,
 776          * we should load the firmware now.
 777          */
 778         retval = rt2x00lib_load_firmware(rt2x00dev);
 779         if (retval)
 780                 return retval;
 781
 782         /*
 783          * Initialize the device.
 784          */
 785         retval = rt2x00lib_initialize(rt2x00dev);
 786         if (retval)
 787                 return retval;
 788
 789         rt2x00dev->intf_ap_count = 0;
 790         rt2x00dev->intf_sta_count = 0;
 791         rt2x00dev->intf_associated = 0;
 792
 793         /* Enable the radio */
 794         retval = rt2x00lib_enable_radio(rt2x00dev);
 795         if (retval) {
 796                 rt2x00queue_uninitialize(rt2x00dev);
 797                 return retval;
 798         }
 799
 800         set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
 801
 802         return 0;
 803 }
 804
 805 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
 806 {
 807         if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 808                 return;
 809
 810         /*
 811          * Perhaps we can add something smarter here,
 812          * but for now just disabling the radio should do.
 813          */
 814         rt2x00lib_disable_radio(rt2x00dev);
 815
 816         rt2x00dev->intf_ap_count = 0;
 817         rt2x00dev->intf_sta_count = 0;
 818         rt2x00dev->intf_associated = 0;
 819 }
 820
 821 /*
 822  * driver allocation handlers.
 823  */
 824 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 825 {
 826         int retval = -ENOMEM;
 827
 828         mutex_init(&rt2x00dev->csr_mutex);
 829
 830         /*
 831          * Make room for rt2x00_intf inside the per-interface
 832          * structure ieee80211_vif.
 833          */
 834         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
 835
 836         /*
 837          * Determine which operating modes are supported, all modes
 838          * which require beaconing, depend on the availability of
 839          * beacon entries.
 840          */
 841         rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 842         if (rt2x00dev->ops->bcn->entry_num > 0)
 843                 rt2x00dev->hw->wiphy->interface_modes |=
 844                     BIT(NL80211_IFTYPE_ADHOC) |
 845                     BIT(NL80211_IFTYPE_AP) |
 846                     BIT(NL80211_IFTYPE_MESH_POINT) |
 847                     BIT(NL80211_IFTYPE_WDS);
 848
 849         /*
 850          * Let the driver probe the device to detect the capabilities.
 851          */
 852         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
 853         if (retval) {
 854                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 855                 goto exit;
 856         }
 857
 858         /*
 859          * Initialize configuration work.
 860          */
 861         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
 862         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
 863
 864         /*
 865          * Allocate queue array.
 866          */
 867         retval = rt2x00queue_allocate(rt2x00dev);
 868         if (retval)
 869                 goto exit;
 870
 871         /*
 872          * Initialize ieee80211 structure.
 873          */
 874         retval = rt2x00lib_probe_hw(rt2x00dev);
 875         if (retval) {
 876                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
 877                 goto exit;
 878         }
 879
 880         /*
 881          * Register extra components.
 882          */
 883         rt2x00link_register(rt2x00dev);
 884         rt2x00leds_register(rt2x00dev);
 885         rt2x00debug_register(rt2x00dev);
 886
 887         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 888
 889         return 0;
 890
 891 exit:
 892         rt2x00lib_remove_dev(rt2x00dev);
 893
 894         return retval;
 895 }
 896 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
 897
 898 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 899 {
 900         clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 901
 902         /*
 903          * Disable radio.
 904          */
 905         rt2x00lib_disable_radio(rt2x00dev);
 906
 907         /*
 908          * Stop all work.
 909          */
 910         cancel_work_sync(&rt2x00dev->filter_work);
 911         cancel_work_sync(&rt2x00dev->intf_work);
 912
 913         /*
 914          * Uninitialize device.
 915          */
 916         rt2x00lib_uninitialize(rt2x00dev);
 917
 918         /*
 919          * Free extra components
 920          */
 921         rt2x00debug_deregister(rt2x00dev);
 922         rt2x00leds_unregister(rt2x00dev);
 923
 924         /*
 925          * Free ieee80211_hw memory.
 926          */
 927         rt2x00lib_remove_hw(rt2x00dev);
 928
 929         /*
 930          * Free firmware image.
 931          */
 932         rt2x00lib_free_firmware(rt2x00dev);
 933
 934         /*
 935          * Free queue structures.
 936          */
 937         rt2x00queue_free(rt2x00dev);
 938 }
 939 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
 940
 941 /*
 942  * Device state handlers
 943  */
 944 #ifdef CONFIG_PM
 945 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
 946 {
 947         NOTICE(rt2x00dev, "Going to sleep.\n");
 948
 949         /*
 950          * Prevent mac80211 from accessing driver while suspended.
 951          */
 952         if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
 953                 return 0;
 954
 955         /*
 956          * Cleanup as much as possible.
 957          */
 958         rt2x00lib_uninitialize(rt2x00dev);
 959
 960         /*
 961          * Suspend/disable extra components.
 962          */
 963         rt2x00leds_suspend(rt2x00dev);
 964         rt2x00debug_deregister(rt2x00dev);
 965
 966         /*
 967          * Set device mode to sleep for power management,
 968          * on some hardware this call seems to consistently fail.
 969          * From the specifications it is hard to tell why it fails,
 970          * and if this is a "bad thing".
 971          * Overall it is safe to just ignore the failure and
 972          * continue suspending. The only downside is that the
 973          * device will not be in optimal power save mode, but with
 974          * the radio and the other components already disabled the
 975          * device is as good as disabled.
 976          */
 977         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))
 978                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
 979                         "continue suspending.\n");
 980
 981         return 0;
 982 }
 983 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
 984
 985 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
 986 {
 987         NOTICE(rt2x00dev, "Waking up.\n");
 988
 989         /*
 990          * Restore/enable extra components.
 991          */
 992         rt2x00debug_register(rt2x00dev);
 993         rt2x00leds_resume(rt2x00dev);
 994
 995         /*
 996          * We are ready again to receive requests from mac80211.
 997          */
 998         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 999
1000         return 0;
1001 }
1002 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1003 #endif /* CONFIG_PM */
1004
1005 /*
1006  * rt2x00lib module information.
1007  */
1008 MODULE_AUTHOR(DRV_PROJECT);
1009 MODULE_VERSION(DRV_VERSION);
1010 MODULE_DESCRIPTION("rt2x00 library");
1011 MODULE_LICENSE("GPL");