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

   1 /*
   2         Copyright (C) 2004 - 2008 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             test_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags))
  45                 return 0;
  46
  47         /*
  48          * Initialize all data queues.
  49          */
  50         rt2x00queue_init_queues(rt2x00dev);
  51
  52         /*
  53          * Enable radio.
  54          */
  55         status =
  56             rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
  57         if (status)
  58                 return status;
  59
  60         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
  61
  62         rt2x00leds_led_radio(rt2x00dev, true);
  63         rt2x00led_led_activity(rt2x00dev, true);
  64
  65         set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
  66
  67         /*
  68          * Enable RX.
  69          */
  70         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
  71
  72         /*
  73          * Start the TX queues.
  74          */
  75         ieee80211_wake_queues(rt2x00dev->hw);
  76
  77         return 0;
  78 }
  79
  80 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
  81 {
  82         if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
  83                 return;
  84
  85         /*
  86          * Stop the TX queues.
  87          */
  88         ieee80211_stop_queues(rt2x00dev->hw);
  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);
 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_dev *rt2x00dev = data;
 190         struct rt2x00_intf *intf = vif_to_intf(vif);
 191
 192         if (vif->type != NL80211_IFTYPE_AP &&
 193             vif->type != NL80211_IFTYPE_ADHOC)
 194                 return;
 195
 196         /*
 197          * Clean up the beacon skb.
 198          */
 199         rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
 200         intf->beacon->skb = NULL;
 201
 202         spin_lock(&intf->lock);
 203         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 204         spin_unlock(&intf->lock);
 205 }
 206
 207 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 208 {
 209         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 210                 return;
 211
 212         ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
 213                                                    rt2x00lib_beacondone_iter,
 214                                                    rt2x00dev);
 215
 216         schedule_work(&rt2x00dev->intf_work);
 217 }
 218 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 219
 220 void rt2x00lib_txdone(struct queue_entry *entry,
 221                       struct txdone_entry_desc *txdesc)
 222 {
 223         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 224         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
 225         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 226         enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
 227         u8 rate_idx, rate_flags;
 228
 229         /*
 230          * Unmap the skb.
 231          */
 232         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 233
 234         /*
 235          * If the IV/EIV data was stripped from the frame before it was
 236          * passed to the hardware, we should now reinsert it again because
 237          * mac80211 will expect the the same data to be present it the
 238          * frame as it was passed to us.
 239          */
 240         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 241                 rt2x00crypto_tx_insert_iv(entry->skb);
 242
 243         /*
 244          * Send frame to debugfs immediately, after this call is completed
 245          * we are going to overwrite the skb->cb array.
 246          */
 247         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
 248
 249         /*
 250          * Update TX statistics.
 251          */
 252         rt2x00dev->link.qual.tx_success +=
 253             test_bit(TXDONE_SUCCESS, &txdesc->flags);
 254         rt2x00dev->link.qual.tx_failed +=
 255             test_bit(TXDONE_FAILURE, &txdesc->flags);
 256
 257         rate_idx = skbdesc->tx_rate_idx;
 258         rate_flags = skbdesc->tx_rate_flags;
 259
 260         /*
 261          * Initialize TX status
 262          */
 263         memset(&tx_info->status, 0, sizeof(tx_info->status));
 264         tx_info->status.ack_signal = 0;
 265         tx_info->status.rates[0].idx = rate_idx;
 266         tx_info->status.rates[0].flags = rate_flags;
 267         tx_info->status.rates[0].count = txdesc->retry + 1;
 268         tx_info->status.rates[1].idx = -1; /* terminate */
 269
 270         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 271                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
 272                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
 273                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 274                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 275         }
 276
 277         if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 278                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
 279                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 280                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 281                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 282         }
 283
 284         /*
 285          * Only send the status report to mac80211 when TX status was
 286          * requested by it. If this was a extra frame coming through
 287          * a mac80211 library call (RTS/CTS) then we should not send the
 288          * status report back.
 289          */
 290         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 291                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
 292         else
 293                 dev_kfree_skb_irq(entry->skb);
 294
 295         /*
 296          * Make this entry available for reuse.
 297          */
 298         entry->skb = NULL;
 299         entry->flags = 0;
 300
 301         rt2x00dev->ops->lib->clear_entry(entry);
 302
 303         clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 304         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 305
 306         /*
 307          * If the data queue was below the threshold before the txdone
 308          * handler we must make sure the packet queue in the mac80211 stack
 309          * is reenabled when the txdone handler has finished.
 310          */
 311         if (!rt2x00queue_threshold(entry->queue))
 312                 ieee80211_wake_queue(rt2x00dev->hw, qid);
 313 }
 314 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 315
 316 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 317                       struct queue_entry *entry)
 318 {
 319         struct rxdone_entry_desc rxdesc;
 320         struct sk_buff *skb;
 321         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 322         struct ieee80211_supported_band *sband;
 323         const struct rt2x00_rate *rate;
 324         unsigned int header_length;
 325         unsigned int align;
 326         unsigned int i;
 327         int idx = -1;
 328
 329         /*
 330          * Allocate a new sk_buffer. If no new buffer available, drop the
 331          * received frame and reuse the existing buffer.
 332          */
 333         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
 334         if (!skb)
 335                 return;
 336
 337         /*
 338          * Unmap the skb.
 339          */
 340         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 341
 342         /*
 343          * Extract the RXD details.
 344          */
 345         memset(&rxdesc, 0, sizeof(rxdesc));
 346         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
 347
 348         /*
 349          * The data behind the ieee80211 header must be
 350          * aligned on a 4 byte boundary.
 351          */
 352         header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 353         align = ((unsigned long)(entry->skb->data + header_length)) & 3;
 354
 355         /*
 356          * Hardware might have stripped the IV/EIV/ICV data,
 357          * in that case it is possible that the data was
 358          * provided seperately (through hardware descriptor)
 359          * in which case we should reinsert the data into the frame.
 360          */
 361         if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
 362             (rxdesc.flags & RX_FLAG_IV_STRIPPED)) {
 363                 rt2x00crypto_rx_insert_iv(entry->skb, align,
 364                                           header_length, &rxdesc);
 365         } else if (align) {
 366                 skb_push(entry->skb, align);
 367                 /* Move entire frame in 1 command */
 368                 memmove(entry->skb->data, entry->skb->data + align,
 369                         rxdesc.size);
 370         }
 371
 372         /* Update data pointers, trim buffer to correct size */
 373         skb_trim(entry->skb, rxdesc.size);
 374
 375         /*
 376          * Update RX statistics.
 377          */
 378         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 379         for (i = 0; i < sband->n_bitrates; i++) {
 380                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 381
 382                 if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
 383                      (rate->plcp == rxdesc.signal)) ||
 384                     ((rxdesc.dev_flags & RXDONE_SIGNAL_BITRATE) &&
 385                       (rate->bitrate == rxdesc.signal))) {
 386                         idx = i;
 387                         break;
 388                 }
 389         }
 390
 391         if (idx < 0) {
 392                 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
 393                         "signal=0x%.2x, plcp=%d.\n", rxdesc.signal,
 394                         !!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP));
 395                 idx = 0;
 396         }
 397
 398         /*
 399          * Update extra components
 400          */
 401         rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
 402         rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
 403
 404         rx_status->mactime = rxdesc.timestamp;
 405         rx_status->rate_idx = idx;
 406         rx_status->qual = rt2x00link_calculate_signal(rt2x00dev, rxdesc.rssi);
 407         rx_status->signal = rxdesc.rssi;
 408         rx_status->flag = rxdesc.flags;
 409         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 410
 411         /*
 412          * Send frame to mac80211 & debugfs.
 413          * mac80211 will clean up the skb structure.
 414          */
 415         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 416         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 417
 418         /*
 419          * Replace the skb with the freshly allocated one.
 420          */
 421         entry->skb = skb;
 422         entry->flags = 0;
 423
 424         rt2x00dev->ops->lib->clear_entry(entry);
 425
 426         rt2x00queue_index_inc(entry->queue, Q_INDEX);
 427 }
 428 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 429
 430 /*
 431  * Driver initialization handlers.
 432  */
 433 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 434         {
 435                 .flags = DEV_RATE_CCK,
 436                 .bitrate = 10,
 437                 .ratemask = BIT(0),
 438                 .plcp = 0x00,
 439         },
 440         {
 441                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 442                 .bitrate = 20,
 443                 .ratemask = BIT(1),
 444                 .plcp = 0x01,
 445         },
 446         {
 447                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 448                 .bitrate = 55,
 449                 .ratemask = BIT(2),
 450                 .plcp = 0x02,
 451         },
 452         {
 453                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 454                 .bitrate = 110,
 455                 .ratemask = BIT(3),
 456                 .plcp = 0x03,
 457         },
 458         {
 459                 .flags = DEV_RATE_OFDM,
 460                 .bitrate = 60,
 461                 .ratemask = BIT(4),
 462                 .plcp = 0x0b,
 463         },
 464         {
 465                 .flags = DEV_RATE_OFDM,
 466                 .bitrate = 90,
 467                 .ratemask = BIT(5),
 468                 .plcp = 0x0f,
 469         },
 470         {
 471                 .flags = DEV_RATE_OFDM,
 472                 .bitrate = 120,
 473                 .ratemask = BIT(6),
 474                 .plcp = 0x0a,
 475         },
 476         {
 477                 .flags = DEV_RATE_OFDM,
 478                 .bitrate = 180,
 479                 .ratemask = BIT(7),
 480                 .plcp = 0x0e,
 481         },
 482         {
 483                 .flags = DEV_RATE_OFDM,
 484                 .bitrate = 240,
 485                 .ratemask = BIT(8),
 486                 .plcp = 0x09,
 487         },
 488         {
 489                 .flags = DEV_RATE_OFDM,
 490                 .bitrate = 360,
 491                 .ratemask = BIT(9),
 492                 .plcp = 0x0d,
 493         },
 494         {
 495                 .flags = DEV_RATE_OFDM,
 496                 .bitrate = 480,
 497                 .ratemask = BIT(10),
 498                 .plcp = 0x08,
 499         },
 500         {
 501                 .flags = DEV_RATE_OFDM,
 502                 .bitrate = 540,
 503                 .ratemask = BIT(11),
 504                 .plcp = 0x0c,
 505         },
 506 };
 507
 508 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 509                               const int channel, const int tx_power,
 510                               const int value)
 511 {
 512         entry->center_freq = ieee80211_channel_to_frequency(channel);
 513         entry->hw_value = value;
 514         entry->max_power = tx_power;
 515         entry->max_antenna_gain = 0xff;
 516 }
 517
 518 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 519                            const u16 index, const struct rt2x00_rate *rate)
 520 {
 521         entry->flags = 0;
 522         entry->bitrate = rate->bitrate;
 523         entry->hw_value =index;
 524         entry->hw_value_short = index;
 525
 526         if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
 527                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 528 }
 529
 530 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 531                                     struct hw_mode_spec *spec)
 532 {
 533         struct ieee80211_hw *hw = rt2x00dev->hw;
 534         struct ieee80211_channel *channels;
 535         struct ieee80211_rate *rates;
 536         unsigned int num_rates;
 537         unsigned int i;
 538
 539         num_rates = 0;
 540         if (spec->supported_rates & SUPPORT_RATE_CCK)
 541                 num_rates += 4;
 542         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 543                 num_rates += 8;
 544
 545         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 546         if (!channels)
 547                 return -ENOMEM;
 548
 549         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 550         if (!rates)
 551                 goto exit_free_channels;
 552
 553         /*
 554          * Initialize Rate list.
 555          */
 556         for (i = 0; i < num_rates; i++)
 557                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 558
 559         /*
 560          * Initialize Channel list.
 561          */
 562         for (i = 0; i < spec->num_channels; i++) {
 563                 rt2x00lib_channel(&channels[i],
 564                                   spec->channels[i].channel,
 565                                   spec->channels_info[i].tx_power1, i);
 566         }
 567
 568         /*
 569          * Intitialize 802.11b, 802.11g
 570          * Rates: CCK, OFDM.
 571          * Channels: 2.4 GHz
 572          */
 573         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 574                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 575                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 576                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 577                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 578                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 579                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 580         }
 581
 582         /*
 583          * Intitialize 802.11a
 584          * Rates: OFDM.
 585          * Channels: OFDM, UNII, HiperLAN2.
 586          */
 587         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 588                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 589                     spec->num_channels - 14;
 590                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 591                     num_rates - 4;
 592                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 593                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 594                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 595                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 596         }
 597
 598         return 0;
 599
 600  exit_free_channels:
 601         kfree(channels);
 602         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 603         return -ENOMEM;
 604 }
 605
 606 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 607 {
 608         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 609                 ieee80211_unregister_hw(rt2x00dev->hw);
 610
 611         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 612                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 613                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 614                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 615                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 616         }
 617
 618         kfree(rt2x00dev->spec.channels_info);
 619 }
 620
 621 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 622 {
 623         struct hw_mode_spec *spec = &rt2x00dev->spec;
 624         int status;
 625
 626         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 627                 return 0;
 628
 629         /*
 630          * Initialize HW modes.
 631          */
 632         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 633         if (status)
 634                 return status;
 635
 636         /*
 637          * Initialize HW fields.
 638          */
 639         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
 640
 641         /*
 642          * Register HW.
 643          */
 644         status = ieee80211_register_hw(rt2x00dev->hw);
 645         if (status) {
 646                 rt2x00lib_remove_hw(rt2x00dev);
 647                 return status;
 648         }
 649
 650         set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
 651
 652         return 0;
 653 }
 654
 655 /*
 656  * Initialization/uninitialization handlers.
 657  */
 658 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 659 {
 660         if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 661                 return;
 662
 663         /*
 664          * Unregister extra components.
 665          */
 666         rt2x00rfkill_unregister(rt2x00dev);
 667
 668         /*
 669          * Allow the HW to uninitialize.
 670          */
 671         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 672
 673         /*
 674          * Free allocated queue entries.
 675          */
 676         rt2x00queue_uninitialize(rt2x00dev);
 677 }
 678
 679 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 680 {
 681         int status;
 682
 683         if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 684                 return 0;
 685
 686         /*
 687          * Allocate all queue entries.
 688          */
 689         status = rt2x00queue_initialize(rt2x00dev);
 690         if (status)
 691                 return status;
 692
 693         /*
 694          * Initialize the device.
 695          */
 696         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 697         if (status) {
 698                 rt2x00queue_uninitialize(rt2x00dev);
 699                 return status;
 700         }
 701
 702         set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
 703
 704         /*
 705          * Register the extra components.
 706          */
 707         rt2x00rfkill_register(rt2x00dev);
 708
 709         return 0;
 710 }
 711
 712 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
 713 {
 714         int retval;
 715
 716         if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 717                 return 0;
 718
 719         /*
 720          * If this is the first interface which is added,
 721          * we should load the firmware now.
 722          */
 723         retval = rt2x00lib_load_firmware(rt2x00dev);
 724         if (retval)
 725                 return retval;
 726
 727         /*
 728          * Initialize the device.
 729          */
 730         retval = rt2x00lib_initialize(rt2x00dev);
 731         if (retval)
 732                 return retval;
 733
 734         rt2x00dev->intf_ap_count = 0;
 735         rt2x00dev->intf_sta_count = 0;
 736         rt2x00dev->intf_associated = 0;
 737
 738         set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
 739
 740         return 0;
 741 }
 742
 743 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
 744 {
 745         if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 746                 return;
 747
 748         /*
 749          * Perhaps we can add something smarter here,
 750          * but for now just disabling the radio should do.
 751          */
 752         rt2x00lib_disable_radio(rt2x00dev);
 753
 754         rt2x00dev->intf_ap_count = 0;
 755         rt2x00dev->intf_sta_count = 0;
 756         rt2x00dev->intf_associated = 0;
 757 }
 758
 759 /*
 760  * driver allocation handlers.
 761  */
 762 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 763 {
 764         int retval = -ENOMEM;
 765
 766         mutex_init(&rt2x00dev->csr_mutex);
 767
 768         /*
 769          * Make room for rt2x00_intf inside the per-interface
 770          * structure ieee80211_vif.
 771          */
 772         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
 773
 774         /*
 775          * Determine which operating modes are supported, all modes
 776          * which require beaconing, depend on the availability of
 777          * beacon entries.
 778          */
 779         rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 780         if (rt2x00dev->ops->bcn->entry_num > 0)
 781                 rt2x00dev->hw->wiphy->interface_modes |=
 782                     BIT(NL80211_IFTYPE_ADHOC) |
 783                     BIT(NL80211_IFTYPE_AP);
 784
 785         /*
 786          * Let the driver probe the device to detect the capabilities.
 787          */
 788         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
 789         if (retval) {
 790                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 791                 goto exit;
 792         }
 793
 794         /*
 795          * Initialize configuration work.
 796          */
 797         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
 798         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
 799
 800         /*
 801          * Allocate queue array.
 802          */
 803         retval = rt2x00queue_allocate(rt2x00dev);
 804         if (retval)
 805                 goto exit;
 806
 807         /*
 808          * Initialize ieee80211 structure.
 809          */
 810         retval = rt2x00lib_probe_hw(rt2x00dev);
 811         if (retval) {
 812                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
 813                 goto exit;
 814         }
 815
 816         /*
 817          * Register extra components.
 818          */
 819         rt2x00link_register(rt2x00dev);
 820         rt2x00leds_register(rt2x00dev);
 821         rt2x00rfkill_allocate(rt2x00dev);
 822         rt2x00debug_register(rt2x00dev);
 823
 824         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 825
 826         return 0;
 827
 828 exit:
 829         rt2x00lib_remove_dev(rt2x00dev);
 830
 831         return retval;
 832 }
 833 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
 834
 835 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 836 {
 837         clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 838
 839         /*
 840          * Disable radio.
 841          */
 842         rt2x00lib_disable_radio(rt2x00dev);
 843
 844         /*
 845          * Uninitialize device.
 846          */
 847         rt2x00lib_uninitialize(rt2x00dev);
 848
 849         /*
 850          * Free extra components
 851          */
 852         rt2x00debug_deregister(rt2x00dev);
 853         rt2x00rfkill_free(rt2x00dev);
 854         rt2x00leds_unregister(rt2x00dev);
 855
 856         /*
 857          * Free ieee80211_hw memory.
 858          */
 859         rt2x00lib_remove_hw(rt2x00dev);
 860
 861         /*
 862          * Free firmware image.
 863          */
 864         rt2x00lib_free_firmware(rt2x00dev);
 865
 866         /*
 867          * Free queue structures.
 868          */
 869         rt2x00queue_free(rt2x00dev);
 870 }
 871 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
 872
 873 /*
 874  * Device state handlers
 875  */
 876 #ifdef CONFIG_PM
 877 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
 878 {
 879         int retval;
 880
 881         NOTICE(rt2x00dev, "Going to sleep.\n");
 882
 883         /*
 884          * Only continue if mac80211 has open interfaces.
 885          */
 886         if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
 887             !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 888                 goto exit;
 889
 890         set_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags);
 891
 892         /*
 893          * Disable radio.
 894          */
 895         rt2x00lib_stop(rt2x00dev);
 896         rt2x00lib_uninitialize(rt2x00dev);
 897
 898         /*
 899          * Suspend/disable extra components.
 900          */
 901         rt2x00leds_suspend(rt2x00dev);
 902         rt2x00debug_deregister(rt2x00dev);
 903
 904 exit:
 905         /*
 906          * Set device mode to sleep for power management,
 907          * on some hardware this call seems to consistently fail.
 908          * From the specifications it is hard to tell why it fails,
 909          * and if this is a "bad thing".
 910          * Overall it is safe to just ignore the failure and
 911          * continue suspending. The only downside is that the
 912          * device will not be in optimal power save mode, but with
 913          * the radio and the other components already disabled the
 914          * device is as good as disabled.
 915          */
 916         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
 917         if (retval)
 918                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
 919                         "continue suspending.\n");
 920
 921         return 0;
 922 }
 923 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
 924
 925 static void rt2x00lib_resume_intf(void *data, u8 *mac,
 926                                   struct ieee80211_vif *vif)
 927 {
 928         struct rt2x00_dev *rt2x00dev = data;
 929         struct rt2x00_intf *intf = vif_to_intf(vif);
 930
 931         spin_lock(&intf->lock);
 932
 933         rt2x00lib_config_intf(rt2x00dev, intf,
 934                               vif->type, intf->mac, intf->bssid);
 935
 936
 937         /*
 938          * Master or Ad-hoc mode require a new beacon update.
 939          */
 940         if (vif->type == NL80211_IFTYPE_AP ||
 941             vif->type == NL80211_IFTYPE_ADHOC)
 942                 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 943
 944         spin_unlock(&intf->lock);
 945 }
 946
 947 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
 948 {
 949         int retval;
 950
 951         NOTICE(rt2x00dev, "Waking up.\n");
 952
 953         /*
 954          * Restore/enable extra components.
 955          */
 956         rt2x00debug_register(rt2x00dev);
 957         rt2x00leds_resume(rt2x00dev);
 958
 959         /*
 960          * Only continue if mac80211 had open interfaces.
 961          */
 962         if (!test_and_clear_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags))
 963                 return 0;
 964
 965         /*
 966          * Reinitialize device and all active interfaces.
 967          */
 968         retval = rt2x00lib_start(rt2x00dev);
 969         if (retval)
 970                 goto exit;
 971
 972         /*
 973          * Reconfigure device.
 974          */
 975         retval = rt2x00mac_config(rt2x00dev->hw, ~0);
 976         if (retval)
 977                 goto exit;
 978
 979         /*
 980          * Iterator over each active interface to
 981          * reconfigure the hardware.
 982          */
 983         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 984                                             rt2x00lib_resume_intf, rt2x00dev);
 985
 986         /*
 987          * We are ready again to receive requests from mac80211.
 988          */
 989         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 990
 991         /*
 992          * It is possible that during that mac80211 has attempted
 993          * to send frames while we were suspending or resuming.
 994          * In that case we have disabled the TX queue and should
 995          * now enable it again
 996          */
 997         ieee80211_wake_queues(rt2x00dev->hw);
 998
 999         /*
1000          * During interface iteration we might have changed the
1001          * delayed_flags, time to handles the event by calling
1002          * the work handler directly.
1003          */
1004         rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1005
1006         return 0;
1007
1008 exit:
1009         rt2x00lib_stop(rt2x00dev);
1010         rt2x00lib_uninitialize(rt2x00dev);
1011         rt2x00debug_deregister(rt2x00dev);
1012
1013         return retval;
1014 }
1015 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1016 #endif /* CONFIG_PM */
1017
1018 /*
1019  * rt2x00lib module information.
1020  */
1021 MODULE_AUTHOR(DRV_PROJECT);
1022 MODULE_VERSION(DRV_VERSION);
1023 MODULE_DESCRIPTION("rt2x00 library");
1024 MODULE_LICENSE("GPL");