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