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             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 in mac80211.
  87          */
  88         ieee80211_stop_queues(rt2x00dev->hw);
  89         rt2x00queue_stop_queues(rt2x00dev);
  90
  91         /*
  92          * Disable RX.
  93          */
  94         rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
  95
  96         /*
  97          * Disable radio.
  98          */
  99         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
 100         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
 101         rt2x00led_led_activity(rt2x00dev, false);
 102         rt2x00leds_led_radio(rt2x00dev, false);
 103 }
 104
 105 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
 106 {
 107         /*
 108          * When we are disabling the RX, we should also stop the link tuner.
 109          */
 110         if (state == STATE_RADIO_RX_OFF)
 111                 rt2x00link_stop_tuner(rt2x00dev);
 112
 113         rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
 114
 115         /*
 116          * When we are enabling the RX, we should also start the link tuner.
 117          */
 118         if (state == STATE_RADIO_RX_ON)
 119                 rt2x00link_start_tuner(rt2x00dev);
 120 }
 121
 122 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 123 {
 124         struct rt2x00_dev *rt2x00dev =
 125             container_of(work, struct rt2x00_dev, filter_work);
 126
 127         rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
 128 }
 129
 130 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
 131                                           struct ieee80211_vif *vif)
 132 {
 133         struct rt2x00_dev *rt2x00dev = data;
 134         struct rt2x00_intf *intf = vif_to_intf(vif);
 135         struct ieee80211_bss_conf conf;
 136         int delayed_flags;
 137
 138         /*
 139          * Copy all data we need during this action under the protection
 140          * of a spinlock. Otherwise race conditions might occur which results
 141          * into an invalid configuration.
 142          */
 143         spin_lock(&intf->lock);
 144
 145         memcpy(&conf, &vif->bss_conf, sizeof(conf));
 146         delayed_flags = intf->delayed_flags;
 147         intf->delayed_flags = 0;
 148
 149         spin_unlock(&intf->lock);
 150
 151         /*
 152          * It is possible the radio was disabled while the work had been
 153          * scheduled. If that happens we should return here immediately,
 154          * note that in the spinlock protected area above the delayed_flags
 155          * have been cleared correctly.
 156          */
 157         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 158                 return;
 159
 160         if (delayed_flags & DELAYED_UPDATE_BEACON)
 161                 rt2x00queue_update_beacon(rt2x00dev, vif, true);
 162
 163         if (delayed_flags & DELAYED_CONFIG_ERP)
 164                 rt2x00lib_config_erp(rt2x00dev, intf, &conf);
 165
 166         if (delayed_flags & DELAYED_LED_ASSOC)
 167                 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
 168 }
 169
 170 static void rt2x00lib_intf_scheduled(struct work_struct *work)
 171 {
 172         struct rt2x00_dev *rt2x00dev =
 173             container_of(work, struct rt2x00_dev, intf_work);
 174
 175         /*
 176          * Iterate over each interface and perform the
 177          * requested configurations.
 178          */
 179         ieee80211_iterate_active_interfaces(rt2x00dev->hw,
 180                                             rt2x00lib_intf_scheduled_iter,
 181                                             rt2x00dev);
 182 }
 183
 184 /*
 185  * Interrupt context handlers.
 186  */
 187 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
 188                                       struct ieee80211_vif *vif)
 189 {
 190         struct rt2x00_dev *rt2x00dev = data;
 191         struct rt2x00_intf *intf = vif_to_intf(vif);
 192
 193         if (vif->type != NL80211_IFTYPE_AP &&
 194             vif->type != NL80211_IFTYPE_ADHOC &&
 195             vif->type != NL80211_IFTYPE_MESH_POINT &&
 196             vif->type != NL80211_IFTYPE_WDS)
 197                 return;
 198
 199         /*
 200          * Clean up the beacon skb.
 201          */
 202         rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
 203         intf->beacon->skb = NULL;
 204
 205         spin_lock(&intf->lock);
 206         intf->delayed_flags |= DELAYED_UPDATE_BEACON;
 207         spin_unlock(&intf->lock);
 208 }
 209
 210 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 211 {
 212         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
 213                 return;
 214
 215         ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
 216                                                    rt2x00lib_beacondone_iter,
 217                                                    rt2x00dev);
 218
 219         queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 220 }
 221 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
 222
 223 void rt2x00lib_txdone(struct queue_entry *entry,
 224                       struct txdone_entry_desc *txdesc)
 225 {
 226         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 227         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
 228         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
 229         enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
 230         unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 231         u8 rate_idx, rate_flags;
 232
 233         /*
 234          * Unmap the skb.
 235          */
 236         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 237
 238         /*
 239          * Remove L2 padding which was added during
 240          */
 241         if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
 242                 rt2x00queue_payload_align(entry->skb, true, header_length);
 243
 244         /*
 245          * If the IV/EIV data was stripped from the frame before it was
 246          * passed to the hardware, we should now reinsert it again because
 247          * mac80211 will expect the the same data to be present it the
 248          * frame as it was passed to us.
 249          */
 250         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 251                 rt2x00crypto_tx_insert_iv(entry->skb, header_length);
 252
 253         /*
 254          * Send frame to debugfs immediately, after this call is completed
 255          * we are going to overwrite the skb->cb array.
 256          */
 257         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
 258
 259         /*
 260          * Update TX statistics.
 261          */
 262         rt2x00dev->link.qual.tx_success +=
 263             test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 264             test_bit(TXDONE_UNKNOWN, &txdesc->flags);
 265         rt2x00dev->link.qual.tx_failed +=
 266             test_bit(TXDONE_FAILURE, &txdesc->flags);
 267
 268         rate_idx = skbdesc->tx_rate_idx;
 269         rate_flags = skbdesc->tx_rate_flags;
 270
 271         /*
 272          * Initialize TX status
 273          */
 274         memset(&tx_info->status, 0, sizeof(tx_info->status));
 275         tx_info->status.ack_signal = 0;
 276         tx_info->status.rates[0].idx = rate_idx;
 277         tx_info->status.rates[0].flags = rate_flags;
 278         tx_info->status.rates[0].count = txdesc->retry + 1;
 279         tx_info->status.rates[1].idx = -1; /* terminate */
 280
 281         if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 283                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
 284                         tx_info->flags |= IEEE80211_TX_STAT_ACK;
 285                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 286                         rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 287         }
 288
 289         if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 290                 if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
 291                                 test_bit(TXDONE_UNKNOWN, &txdesc->flags))
 292                         rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
 293                 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
 294                         rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 295         }
 296
 297         /*
 298          * Only send the status report to mac80211 when TX status was
 299          * requested by it. If this was a extra frame coming through
 300          * a mac80211 library call (RTS/CTS) then we should not send the
 301          * status report back.
 302          */
 303         if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 304                 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
 305         else
 306                 dev_kfree_skb_irq(entry->skb);
 307
 308         /*
 309          * Make this entry available for reuse.
 310          */
 311         entry->skb = NULL;
 312         entry->flags = 0;
 313
 314         rt2x00dev->ops->lib->clear_entry(entry);
 315
 316         clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 317         rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 318
 319         /*
 320          * If the data queue was below the threshold before the txdone
 321          * handler we must make sure the packet queue in the mac80211 stack
 322          * is reenabled when the txdone handler has finished.
 323          */
 324         if (!rt2x00queue_threshold(entry->queue))
 325                 ieee80211_wake_queue(rt2x00dev->hw, qid);
 326 }
 327 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 328
 329 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
 330                                         struct rxdone_entry_desc *rxdesc)
 331 {
 332         struct ieee80211_supported_band *sband;
 333         const struct rt2x00_rate *rate;
 334         unsigned int i;
 335         int signal;
 336         int type;
 337
 338         /*
 339          * For non-HT rates the MCS value needs to contain the
 340          * actually used rate modulation (CCK or OFDM).
 341          */
 342         if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
 343                 signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal);
 344         else
 345                 signal = rxdesc->signal;
 346
 347         type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
 348
 349         sband = &rt2x00dev->bands[rt2x00dev->curr_band];
 350         for (i = 0; i < sband->n_bitrates; i++) {
 351                 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
 352
 353                 if (((type == RXDONE_SIGNAL_PLCP) &&
 354                      (rate->plcp == signal)) ||
 355                     ((type == RXDONE_SIGNAL_BITRATE) &&
 356                       (rate->bitrate == signal)) ||
 357                     ((type == RXDONE_SIGNAL_MCS) &&
 358                       (rate->mcs == signal))) {
 359                         return i;
 360                 }
 361         }
 362
 363         WARNING(rt2x00dev, "Frame received with unrecognized signal, "
 364                 "signal=0x%.4x, type=%d.\n", signal, type);
 365         return 0;
 366 }
 367
 368 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 369                       struct queue_entry *entry)
 370 {
 371         struct rxdone_entry_desc rxdesc;
 372         struct sk_buff *skb;
 373         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 374         unsigned int header_length;
 375         bool l2pad;
 376         int rate_idx;
 377         /*
 378          * Allocate a new sk_buffer. If no new buffer available, drop the
 379          * received frame and reuse the existing buffer.
 380          */
 381         skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
 382         if (!skb)
 383                 return;
 384
 385         /*
 386          * Unmap the skb.
 387          */
 388         rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
 389
 390         /*
 391          * Extract the RXD details.
 392          */
 393         memset(&rxdesc, 0, sizeof(rxdesc));
 394         rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
 395
 396         /* Trim buffer to correct size */
 397         skb_trim(entry->skb, rxdesc.size);
 398
 399         /*
 400          * The data behind the ieee80211 header must be
 401          * aligned on a 4 byte boundary.
 402          */
 403         header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 404         l2pad = !!(rxdesc.dev_flags & RXDONE_L2PAD);
 405
 406         /*
 407          * Hardware might have stripped the IV/EIV/ICV data,
 408          * in that case it is possible that the data was
 409          * provided seperately (through hardware descriptor)
 410          * in which case we should reinsert the data into the frame.
 411          */
 412         if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
 413             (rxdesc.flags & RX_FLAG_IV_STRIPPED))
 414                 rt2x00crypto_rx_insert_iv(entry->skb, l2pad, header_length,
 415                                           &rxdesc);
 416         else
 417                 rt2x00queue_payload_align(entry->skb, l2pad, header_length);
 418
 419         /*
 420          * Check if the frame was received using HT. In that case,
 421          * the rate is the MCS index and should be passed to mac80211
 422          * directly. Otherwise we need to translate the signal to
 423          * the correct bitrate index.
 424          */
 425         if (rxdesc.rate_mode == RATE_MODE_CCK ||
 426             rxdesc.rate_mode == RATE_MODE_OFDM) {
 427                 rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
 428         } else {
 429                 rxdesc.flags |= RX_FLAG_HT;
 430                 rate_idx = rxdesc.signal;
 431         }
 432
 433         /*
 434          * Update extra components
 435          */
 436         rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
 437         rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
 438
 439         rx_status->mactime = rxdesc.timestamp;
 440         rx_status->rate_idx = rate_idx;
 441         rx_status->qual = rt2x00link_calculate_signal(rt2x00dev, rxdesc.rssi);
 442         rx_status->signal = rxdesc.rssi;
 443         rx_status->noise = rxdesc.noise;
 444         rx_status->flag = rxdesc.flags;
 445         rx_status->antenna = rt2x00dev->link.ant.active.rx;
 446
 447         /*
 448          * Send frame to mac80211 & debugfs.
 449          * mac80211 will clean up the skb structure.
 450          */
 451         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 452         memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
 453         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
 454
 455         /*
 456          * Replace the skb with the freshly allocated one.
 457          */
 458         entry->skb = skb;
 459         entry->flags = 0;
 460
 461         rt2x00dev->ops->lib->clear_entry(entry);
 462
 463         rt2x00queue_index_inc(entry->queue, Q_INDEX);
 464 }
 465 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 466
 467 /*
 468  * Driver initialization handlers.
 469  */
 470 const struct rt2x00_rate rt2x00_supported_rates[12] = {
 471         {
 472                 .flags = DEV_RATE_CCK,
 473                 .bitrate = 10,
 474                 .ratemask = BIT(0),
 475                 .plcp = 0x00,
 476                 .mcs = RATE_MCS(RATE_MODE_CCK, 0),
 477         },
 478         {
 479                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 480                 .bitrate = 20,
 481                 .ratemask = BIT(1),
 482                 .plcp = 0x01,
 483                 .mcs = RATE_MCS(RATE_MODE_CCK, 1),
 484         },
 485         {
 486                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 487                 .bitrate = 55,
 488                 .ratemask = BIT(2),
 489                 .plcp = 0x02,
 490                 .mcs = RATE_MCS(RATE_MODE_CCK, 2),
 491         },
 492         {
 493                 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
 494                 .bitrate = 110,
 495                 .ratemask = BIT(3),
 496                 .plcp = 0x03,
 497                 .mcs = RATE_MCS(RATE_MODE_CCK, 3),
 498         },
 499         {
 500                 .flags = DEV_RATE_OFDM,
 501                 .bitrate = 60,
 502                 .ratemask = BIT(4),
 503                 .plcp = 0x0b,
 504                 .mcs = RATE_MCS(RATE_MODE_OFDM, 0),
 505         },
 506         {
 507                 .flags = DEV_RATE_OFDM,
 508                 .bitrate = 90,
 509                 .ratemask = BIT(5),
 510                 .plcp = 0x0f,
 511                 .mcs = RATE_MCS(RATE_MODE_OFDM, 1),
 512         },
 513         {
 514                 .flags = DEV_RATE_OFDM,
 515                 .bitrate = 120,
 516                 .ratemask = BIT(6),
 517                 .plcp = 0x0a,
 518                 .mcs = RATE_MCS(RATE_MODE_OFDM, 2),
 519         },
 520         {
 521                 .flags = DEV_RATE_OFDM,
 522                 .bitrate = 180,
 523                 .ratemask = BIT(7),
 524                 .plcp = 0x0e,
 525                 .mcs = RATE_MCS(RATE_MODE_OFDM, 3),
 526         },
 527         {
 528                 .flags = DEV_RATE_OFDM,
 529                 .bitrate = 240,
 530                 .ratemask = BIT(8),
 531                 .plcp = 0x09,
 532                 .mcs = RATE_MCS(RATE_MODE_OFDM, 4),
 533         },
 534         {
 535                 .flags = DEV_RATE_OFDM,
 536                 .bitrate = 360,
 537                 .ratemask = BIT(9),
 538                 .plcp = 0x0d,
 539                 .mcs = RATE_MCS(RATE_MODE_OFDM, 5),
 540         },
 541         {
 542                 .flags = DEV_RATE_OFDM,
 543                 .bitrate = 480,
 544                 .ratemask = BIT(10),
 545                 .plcp = 0x08,
 546                 .mcs = RATE_MCS(RATE_MODE_OFDM, 6),
 547         },
 548         {
 549                 .flags = DEV_RATE_OFDM,
 550                 .bitrate = 540,
 551                 .ratemask = BIT(11),
 552                 .plcp = 0x0c,
 553                 .mcs = RATE_MCS(RATE_MODE_OFDM, 7),
 554         },
 555 };
 556
 557 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 558                               const int channel, const int tx_power,
 559                               const int value)
 560 {
 561         entry->center_freq = ieee80211_channel_to_frequency(channel);
 562         entry->hw_value = value;
 563         entry->max_power = tx_power;
 564         entry->max_antenna_gain = 0xff;
 565 }
 566
 567 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 568                            const u16 index, const struct rt2x00_rate *rate)
 569 {
 570         entry->flags = 0;
 571         entry->bitrate = rate->bitrate;
 572         entry->hw_value =index;
 573         entry->hw_value_short = index;
 574
 575         if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
 576                 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
 577 }
 578
 579 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
 580                                     struct hw_mode_spec *spec)
 581 {
 582         struct ieee80211_hw *hw = rt2x00dev->hw;
 583         struct ieee80211_channel *channels;
 584         struct ieee80211_rate *rates;
 585         unsigned int num_rates;
 586         unsigned int i;
 587
 588         num_rates = 0;
 589         if (spec->supported_rates & SUPPORT_RATE_CCK)
 590                 num_rates += 4;
 591         if (spec->supported_rates & SUPPORT_RATE_OFDM)
 592                 num_rates += 8;
 593
 594         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 595         if (!channels)
 596                 return -ENOMEM;
 597
 598         rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
 599         if (!rates)
 600                 goto exit_free_channels;
 601
 602         /*
 603          * Initialize Rate list.
 604          */
 605         for (i = 0; i < num_rates; i++)
 606                 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
 607
 608         /*
 609          * Initialize Channel list.
 610          */
 611         for (i = 0; i < spec->num_channels; i++) {
 612                 rt2x00lib_channel(&channels[i],
 613                                   spec->channels[i].channel,
 614                                   spec->channels_info[i].tx_power1, i);
 615         }
 616
 617         /*
 618          * Intitialize 802.11b, 802.11g
 619          * Rates: CCK, OFDM.
 620          * Channels: 2.4 GHz
 621          */
 622         if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
 623                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
 624                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
 625                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
 626                 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
 627                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 628                     &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
 629                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap,
 630                        &spec->ht, sizeof(spec->ht));
 631         }
 632
 633         /*
 634          * Intitialize 802.11a
 635          * Rates: OFDM.
 636          * Channels: OFDM, UNII, HiperLAN2.
 637          */
 638         if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
 639                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
 640                     spec->num_channels - 14;
 641                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
 642                     num_rates - 4;
 643                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
 644                 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
 645                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 646                     &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
 647                 memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap,
 648                        &spec->ht, sizeof(spec->ht));
 649         }
 650
 651         return 0;
 652
 653  exit_free_channels:
 654         kfree(channels);
 655         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 656         return -ENOMEM;
 657 }
 658
 659 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
 660 {
 661         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 662                 ieee80211_unregister_hw(rt2x00dev->hw);
 663
 664         if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
 665                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
 666                 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
 667                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
 668                 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
 669         }
 670
 671         kfree(rt2x00dev->spec.channels_info);
 672 }
 673
 674 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
 675 {
 676         struct hw_mode_spec *spec = &rt2x00dev->spec;
 677         int status;
 678
 679         if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
 680                 return 0;
 681
 682         /*
 683          * Initialize HW modes.
 684          */
 685         status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
 686         if (status)
 687                 return status;
 688
 689         /*
 690          * Initialize HW fields.
 691          */
 692         rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
 693
 694         /*
 695          * Register HW.
 696          */
 697         status = ieee80211_register_hw(rt2x00dev->hw);
 698         if (status)
 699                 return status;
 700
 701         set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
 702
 703         return 0;
 704 }
 705
 706 /*
 707  * Initialization/uninitialization handlers.
 708  */
 709 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 710 {
 711         if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 712                 return;
 713
 714         /*
 715          * Unregister extra components.
 716          */
 717         rt2x00rfkill_unregister(rt2x00dev);
 718
 719         /*
 720          * Allow the HW to uninitialize.
 721          */
 722         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 723
 724         /*
 725          * Free allocated queue entries.
 726          */
 727         rt2x00queue_uninitialize(rt2x00dev);
 728 }
 729
 730 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 731 {
 732         int status;
 733
 734         if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
 735                 return 0;
 736
 737         /*
 738          * Allocate all queue entries.
 739          */
 740         status = rt2x00queue_initialize(rt2x00dev);
 741         if (status)
 742                 return status;
 743
 744         /*
 745          * Initialize the device.
 746          */
 747         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 748         if (status) {
 749                 rt2x00queue_uninitialize(rt2x00dev);
 750                 return status;
 751         }
 752
 753         set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
 754
 755         /*
 756          * Register the extra components.
 757          */
 758         rt2x00rfkill_register(rt2x00dev);
 759
 760         return 0;
 761 }
 762
 763 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
 764 {
 765         int retval;
 766
 767         if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 768                 return 0;
 769
 770         /*
 771          * If this is the first interface which is added,
 772          * we should load the firmware now.
 773          */
 774         retval = rt2x00lib_load_firmware(rt2x00dev);
 775         if (retval)
 776                 return retval;
 777
 778         /*
 779          * Initialize the device.
 780          */
 781         retval = rt2x00lib_initialize(rt2x00dev);
 782         if (retval)
 783                 return retval;
 784
 785         rt2x00dev->intf_ap_count = 0;
 786         rt2x00dev->intf_sta_count = 0;
 787         rt2x00dev->intf_associated = 0;
 788
 789         set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
 790
 791         return 0;
 792 }
 793
 794 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
 795 {
 796         if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
 797                 return;
 798
 799         /*
 800          * Perhaps we can add something smarter here,
 801          * but for now just disabling the radio should do.
 802          */
 803         rt2x00lib_disable_radio(rt2x00dev);
 804
 805         rt2x00dev->intf_ap_count = 0;
 806         rt2x00dev->intf_sta_count = 0;
 807         rt2x00dev->intf_associated = 0;
 808 }
 809
 810 /*
 811  * driver allocation handlers.
 812  */
 813 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 814 {
 815         int retval = -ENOMEM;
 816
 817         mutex_init(&rt2x00dev->csr_mutex);
 818
 819         /*
 820          * Make room for rt2x00_intf inside the per-interface
 821          * structure ieee80211_vif.
 822          */
 823         rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
 824
 825         /*
 826          * Determine which operating modes are supported, all modes
 827          * which require beaconing, depend on the availability of
 828          * beacon entries.
 829          */
 830         rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
 831         if (rt2x00dev->ops->bcn->entry_num > 0)
 832                 rt2x00dev->hw->wiphy->interface_modes |=
 833                     BIT(NL80211_IFTYPE_ADHOC) |
 834                     BIT(NL80211_IFTYPE_AP) |
 835                     BIT(NL80211_IFTYPE_MESH_POINT) |
 836                     BIT(NL80211_IFTYPE_WDS);
 837
 838         /*
 839          * Let the driver probe the device to detect the capabilities.
 840          */
 841         retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
 842         if (retval) {
 843                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 844                 goto exit;
 845         }
 846
 847         /*
 848          * Initialize configuration work.
 849          */
 850         INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
 851         INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
 852
 853         /*
 854          * Allocate queue array.
 855          */
 856         retval = rt2x00queue_allocate(rt2x00dev);
 857         if (retval)
 858                 goto exit;
 859
 860         /*
 861          * Initialize ieee80211 structure.
 862          */
 863         retval = rt2x00lib_probe_hw(rt2x00dev);
 864         if (retval) {
 865                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
 866                 goto exit;
 867         }
 868
 869         /*
 870          * Register extra components.
 871          */
 872         rt2x00link_register(rt2x00dev);
 873         rt2x00leds_register(rt2x00dev);
 874         rt2x00debug_register(rt2x00dev);
 875
 876         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 877
 878         return 0;
 879
 880 exit:
 881         rt2x00lib_remove_dev(rt2x00dev);
 882
 883         return retval;
 884 }
 885 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
 886
 887 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 888 {
 889         clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 890
 891         /*
 892          * Disable radio.
 893          */
 894         rt2x00lib_disable_radio(rt2x00dev);
 895
 896         /*
 897          * Uninitialize device.
 898          */
 899         rt2x00lib_uninitialize(rt2x00dev);
 900
 901         /*
 902          * Free extra components
 903          */
 904         rt2x00debug_deregister(rt2x00dev);
 905         rt2x00leds_unregister(rt2x00dev);
 906
 907         /*
 908          * Free ieee80211_hw memory.
 909          */
 910         rt2x00lib_remove_hw(rt2x00dev);
 911
 912         /*
 913          * Free firmware image.
 914          */
 915         rt2x00lib_free_firmware(rt2x00dev);
 916
 917         /*
 918          * Free queue structures.
 919          */
 920         rt2x00queue_free(rt2x00dev);
 921 }
 922 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
 923
 924 /*
 925  * Device state handlers
 926  */
 927 #ifdef CONFIG_PM
 928 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
 929 {
 930         NOTICE(rt2x00dev, "Going to sleep.\n");
 931
 932         /*
 933          * Prevent mac80211 from accessing driver while suspended.
 934          */
 935         if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
 936                 return 0;
 937
 938         /*
 939          * Cleanup as much as possible.
 940          */
 941         rt2x00lib_uninitialize(rt2x00dev);
 942
 943         /*
 944          * Suspend/disable extra components.
 945          */
 946         rt2x00leds_suspend(rt2x00dev);
 947         rt2x00debug_deregister(rt2x00dev);
 948
 949         /*
 950          * Set device mode to sleep for power management,
 951          * on some hardware this call seems to consistently fail.
 952          * From the specifications it is hard to tell why it fails,
 953          * and if this is a "bad thing".
 954          * Overall it is safe to just ignore the failure and
 955          * continue suspending. The only downside is that the
 956          * device will not be in optimal power save mode, but with
 957          * the radio and the other components already disabled the
 958          * device is as good as disabled.
 959          */
 960         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))
 961                 WARNING(rt2x00dev, "Device failed to enter sleep state, "
 962                         "continue suspending.\n");
 963
 964         return 0;
 965 }
 966 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
 967
 968 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
 969 {
 970         NOTICE(rt2x00dev, "Waking up.\n");
 971
 972         /*
 973          * Restore/enable extra components.
 974          */
 975         rt2x00debug_register(rt2x00dev);
 976         rt2x00leds_resume(rt2x00dev);
 977
 978         /*
 979          * We are ready again to receive requests from mac80211.
 980          */
 981         set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 982
 983         return 0;
 984 }
 985 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
 986 #endif /* CONFIG_PM */
 987
 988 /*
 989  * rt2x00lib module information.
 990  */
 991 MODULE_AUTHOR(DRV_PROJECT);
 992 MODULE_VERSION(DRV_VERSION);
 993 MODULE_DESCRIPTION("rt2x00 library");
 994 MODULE_LICENSE("GPL");