drivers/net/wireless/libertas/main.c

   1 /**
   2   * This file contains the major functions in WLAN
   3   * driver. It includes init, exit, open, close and main
   4   * thread etc..
   5   */
   6
   7 #include <linux/moduleparam.h>
   8 #include <linux/delay.h>
   9 #include <linux/etherdevice.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/if_arp.h>
  12 #include <linux/kthread.h>
  13 #include <linux/kfifo.h>
  14 #include <linux/stddef.h>
  15 #include <linux/ieee80211.h>
  16 #include <net/iw_handler.h>
  17 #include <net/cfg80211.h>
  18
  19 #include "host.h"
  20 #include "decl.h"
  21 #include "dev.h"
  22 #include "wext.h"
  23 #include "cfg.h"
  24 #include "debugfs.h"
  25 #include "scan.h"
  26 #include "assoc.h"
  27 #include "cmd.h"
  28
  29 #define DRIVER_RELEASE_VERSION "323.p0"
  30 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  31 #ifdef  DEBUG
  32     "-dbg"
  33 #endif
  34     "";
  35
  36
  37 /* Module parameters */
  38 unsigned int lbs_debug;
  39 EXPORT_SYMBOL_GPL(lbs_debug);
  40 module_param_named(libertas_debug, lbs_debug, int, 0644);
  41
  42
  43 /* This global structure is used to send the confirm_sleep command as
  44  * fast as possible down to the firmware. */
  45 struct cmd_confirm_sleep confirm_sleep;
  46
  47
  48 /**
  49  * the table to keep region code
  50  */
  51 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
  52     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
  53
  54 /**
  55  * FW rate table.  FW refers to rates by their index in this table, not by the
  56  * rate value itself.  Values of 0x00 are
  57  * reserved positions.
  58  */
  59 static u8 fw_data_rates[MAX_RATES] =
  60     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
  61       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
  62 };
  63
  64 /**
  65  *  @brief use index to get the data rate
  66  *
  67  *  @param idx                The index of data rate
  68  *  @return                     data rate or 0
  69  */
  70 u32 lbs_fw_index_to_data_rate(u8 idx)
  71 {
  72         if (idx >= sizeof(fw_data_rates))
  73                 idx = 0;
  74         return fw_data_rates[idx];
  75 }
  76
  77 /**
  78  *  @brief use rate to get the index
  79  *
  80  *  @param rate                 data rate
  81  *  @return                     index or 0
  82  */
  83 u8 lbs_data_rate_to_fw_index(u32 rate)
  84 {
  85         u8 i;
  86
  87         if (!rate)
  88                 return 0;
  89
  90         for (i = 0; i < sizeof(fw_data_rates); i++) {
  91                 if (rate == fw_data_rates[i])
  92                         return i;
  93         }
  94         return 0;
  95 }
  96
  97
  98 static int lbs_add_rtap(struct lbs_private *priv);
  99 static void lbs_remove_rtap(struct lbs_private *priv);
 100
 101
 102 /**
 103  * Get function for sysfs attribute rtap
 104  */
 105 static ssize_t lbs_rtap_get(struct device *dev,
 106                 struct device_attribute *attr, char * buf)
 107 {
 108         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 109         return snprintf(buf, 5, "0x%X\n", priv->monitormode);
 110 }
 111
 112 /**
 113  *  Set function for sysfs attribute rtap
 114  */
 115 static ssize_t lbs_rtap_set(struct device *dev,
 116                 struct device_attribute *attr, const char * buf, size_t count)
 117 {
 118         int monitor_mode;
 119         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 120
 121         sscanf(buf, "%x", &monitor_mode);
 122         if (monitor_mode) {
 123                 if (priv->monitormode == monitor_mode)
 124                         return strlen(buf);
 125                 if (!priv->monitormode) {
 126                         if (priv->infra_open || lbs_mesh_open(priv))
 127                                 return -EBUSY;
 128                         if (priv->mode == IW_MODE_INFRA)
 129                                 lbs_cmd_80211_deauthenticate(priv,
 130                                                              priv->curbssparams.bssid,
 131                                                              WLAN_REASON_DEAUTH_LEAVING);
 132                         else if (priv->mode == IW_MODE_ADHOC)
 133                                 lbs_adhoc_stop(priv);
 134                         lbs_add_rtap(priv);
 135                 }
 136                 priv->monitormode = monitor_mode;
 137         } else {
 138                 if (!priv->monitormode)
 139                         return strlen(buf);
 140                 priv->monitormode = 0;
 141                 lbs_remove_rtap(priv);
 142
 143                 if (priv->currenttxskb) {
 144                         dev_kfree_skb_any(priv->currenttxskb);
 145                         priv->currenttxskb = NULL;
 146                 }
 147
 148                 /* Wake queues, command thread, etc. */
 149                 lbs_host_to_card_done(priv);
 150         }
 151
 152         lbs_prepare_and_send_command(priv,
 153                         CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
 154                         CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
 155         return strlen(buf);
 156 }
 157
 158 /**
 159  * lbs_rtap attribute to be exported per ethX interface
 160  * through sysfs (/sys/class/net/ethX/lbs_rtap)
 161  */
 162 static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set );
 163
 164 /**
 165  *  @brief This function opens the ethX interface
 166  *
 167  *  @param dev     A pointer to net_device structure
 168  *  @return        0 or -EBUSY if monitor mode active
 169  */
 170 static int lbs_dev_open(struct net_device *dev)
 171 {
 172         struct lbs_private *priv = dev->ml_priv;
 173         int ret = 0;
 174
 175         lbs_deb_enter(LBS_DEB_NET);
 176
 177         spin_lock_irq(&priv->driver_lock);
 178
 179         if (priv->monitormode) {
 180                 ret = -EBUSY;
 181                 goto out;
 182         }
 183
 184         priv->infra_open = 1;
 185
 186         if (priv->connect_status == LBS_CONNECTED)
 187                 netif_carrier_on(dev);
 188         else
 189                 netif_carrier_off(dev);
 190
 191         if (!priv->tx_pending_len)
 192                 netif_wake_queue(dev);
 193  out:
 194
 195         spin_unlock_irq(&priv->driver_lock);
 196         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 197         return ret;
 198 }
 199
 200 /**
 201  *  @brief This function closes the ethX interface
 202  *
 203  *  @param dev     A pointer to net_device structure
 204  *  @return        0
 205  */
 206 static int lbs_eth_stop(struct net_device *dev)
 207 {
 208         struct lbs_private *priv = dev->ml_priv;
 209
 210         lbs_deb_enter(LBS_DEB_NET);
 211
 212         spin_lock_irq(&priv->driver_lock);
 213         priv->infra_open = 0;
 214         netif_stop_queue(dev);
 215         spin_unlock_irq(&priv->driver_lock);
 216
 217         schedule_work(&priv->mcast_work);
 218
 219         lbs_deb_leave(LBS_DEB_NET);
 220         return 0;
 221 }
 222
 223 static void lbs_tx_timeout(struct net_device *dev)
 224 {
 225         struct lbs_private *priv = dev->ml_priv;
 226
 227         lbs_deb_enter(LBS_DEB_TX);
 228
 229         lbs_pr_err("tx watch dog timeout\n");
 230
 231         dev->trans_start = jiffies;
 232
 233         if (priv->currenttxskb)
 234                 lbs_send_tx_feedback(priv, 0);
 235
 236         /* XX: Shouldn't we also call into the hw-specific driver
 237            to kick it somehow? */
 238         lbs_host_to_card_done(priv);
 239
 240         /* More often than not, this actually happens because the
 241            firmware has crapped itself -- rather than just a very
 242            busy medium. So send a harmless command, and if/when
 243            _that_ times out, we'll kick it in the head. */
 244         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
 245                                      0, 0, NULL);
 246
 247         lbs_deb_leave(LBS_DEB_TX);
 248 }
 249
 250 void lbs_host_to_card_done(struct lbs_private *priv)
 251 {
 252         unsigned long flags;
 253
 254         lbs_deb_enter(LBS_DEB_THREAD);
 255
 256         spin_lock_irqsave(&priv->driver_lock, flags);
 257
 258         priv->dnld_sent = DNLD_RES_RECEIVED;
 259
 260         /* Wake main thread if commands are pending */
 261         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 262                 if (!priv->wakeup_dev_required)
 263                         wake_up_interruptible(&priv->waitq);
 264         }
 265
 266         spin_unlock_irqrestore(&priv->driver_lock, flags);
 267         lbs_deb_leave(LBS_DEB_THREAD);
 268 }
 269 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 270
 271 int lbs_set_mac_address(struct net_device *dev, void *addr)
 272 {
 273         int ret = 0;
 274         struct lbs_private *priv = dev->ml_priv;
 275         struct sockaddr *phwaddr = addr;
 276         struct cmd_ds_802_11_mac_address cmd;
 277
 278         lbs_deb_enter(LBS_DEB_NET);
 279
 280         /* In case it was called from the mesh device */
 281         dev = priv->dev;
 282
 283         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 284         cmd.action = cpu_to_le16(CMD_ACT_SET);
 285         memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
 286
 287         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 288         if (ret) {
 289                 lbs_deb_net("set MAC address failed\n");
 290                 goto done;
 291         }
 292
 293         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 294         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 295         if (priv->mesh_dev)
 296                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 297
 298 done:
 299         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 300         return ret;
 301 }
 302
 303
 304 static inline int mac_in_list(unsigned char *list, int list_len,
 305                               unsigned char *mac)
 306 {
 307         while (list_len) {
 308                 if (!memcmp(list, mac, ETH_ALEN))
 309                         return 1;
 310                 list += ETH_ALEN;
 311                 list_len--;
 312         }
 313         return 0;
 314 }
 315
 316
 317 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 318                                struct net_device *dev, int nr_addrs)
 319 {
 320         int i = nr_addrs;
 321         struct netdev_hw_addr *ha;
 322         int cnt;
 323
 324         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 325                 return nr_addrs;
 326
 327         netif_addr_lock_bh(dev);
 328         cnt = netdev_mc_count(dev);
 329         netdev_for_each_mc_addr(ha, dev) {
 330                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 331                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 332                                     ha->addr);
 333                         cnt--;
 334                         continue;
 335                 }
 336
 337                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 338                         break;
 339                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 340                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 341                             ha->addr);
 342                 i++;
 343                 cnt--;
 344         }
 345         netif_addr_unlock_bh(dev);
 346         if (cnt)
 347                 return -EOVERFLOW;
 348
 349         return i;
 350 }
 351
 352 static void lbs_set_mcast_worker(struct work_struct *work)
 353 {
 354         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 355         struct cmd_ds_mac_multicast_adr mcast_cmd;
 356         int dev_flags;
 357         int nr_addrs;
 358         int old_mac_control = priv->mac_control;
 359
 360         lbs_deb_enter(LBS_DEB_NET);
 361
 362         dev_flags = priv->dev->flags;
 363         if (priv->mesh_dev)
 364                 dev_flags |= priv->mesh_dev->flags;
 365
 366         if (dev_flags & IFF_PROMISC) {
 367                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 368                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 369                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 370                 goto out_set_mac_control;
 371         } else if (dev_flags & IFF_ALLMULTI) {
 372         do_allmulti:
 373                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 374                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 375                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 376                 goto out_set_mac_control;
 377         }
 378
 379         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 380         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 381         if (nr_addrs >= 0 && priv->mesh_dev)
 382                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 383         if (nr_addrs < 0)
 384                 goto do_allmulti;
 385
 386         if (nr_addrs) {
 387                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 388                                     maclist[6*nr_addrs]);
 389
 390                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 391                 mcast_cmd.hdr.size = cpu_to_le16(size);
 392                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 393
 394                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 395
 396                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 397         } else
 398                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 399
 400         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 401                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 402  out_set_mac_control:
 403         if (priv->mac_control != old_mac_control)
 404                 lbs_set_mac_control(priv);
 405
 406         lbs_deb_leave(LBS_DEB_NET);
 407 }
 408
 409 void lbs_set_multicast_list(struct net_device *dev)
 410 {
 411         struct lbs_private *priv = dev->ml_priv;
 412
 413         schedule_work(&priv->mcast_work);
 414 }
 415
 416 /**
 417  *  @brief This function handles the major jobs in the LBS driver.
 418  *  It handles all events generated by firmware, RX data received
 419  *  from firmware and TX data sent from kernel.
 420  *
 421  *  @param data    A pointer to lbs_thread structure
 422  *  @return        0
 423  */
 424 static int lbs_thread(void *data)
 425 {
 426         struct net_device *dev = data;
 427         struct lbs_private *priv = dev->ml_priv;
 428         wait_queue_t wait;
 429
 430         lbs_deb_enter(LBS_DEB_THREAD);
 431
 432         init_waitqueue_entry(&wait, current);
 433
 434         for (;;) {
 435                 int shouldsleep;
 436                 u8 resp_idx;
 437
 438                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 439                                 priv->currenttxskb, priv->dnld_sent);
 440
 441                 add_wait_queue(&priv->waitq, &wait);
 442                 set_current_state(TASK_INTERRUPTIBLE);
 443                 spin_lock_irq(&priv->driver_lock);
 444
 445                 if (kthread_should_stop())
 446                         shouldsleep = 0;        /* Bye */
 447                 else if (priv->surpriseremoved)
 448                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 449                 else if (priv->psstate == PS_STATE_SLEEP)
 450                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 451                 else if (priv->cmd_timed_out)
 452                         shouldsleep = 0;        /* Command timed out. Recover */
 453                 else if (!priv->fw_ready)
 454                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 455                 else if (priv->dnld_sent)
 456                         shouldsleep = 1;        /* Something is en route to the device already */
 457                 else if (priv->tx_pending_len > 0)
 458                         shouldsleep = 0;        /* We've a packet to send */
 459                 else if (priv->resp_len[priv->resp_idx])
 460                         shouldsleep = 0;        /* We have a command response */
 461                 else if (priv->cur_cmd)
 462                         shouldsleep = 1;        /* Can't send a command; one already running */
 463                 else if (!list_empty(&priv->cmdpendingq) &&
 464                                         !(priv->wakeup_dev_required))
 465                         shouldsleep = 0;        /* We have a command to send */
 466                 else if (kfifo_len(&priv->event_fifo))
 467                         shouldsleep = 0;        /* We have an event to process */
 468                 else
 469                         shouldsleep = 1;        /* No command */
 470
 471                 if (shouldsleep) {
 472                         lbs_deb_thread("sleeping, connect_status %d, "
 473                                 "psmode %d, psstate %d\n",
 474                                 priv->connect_status,
 475                                 priv->psmode, priv->psstate);
 476                         spin_unlock_irq(&priv->driver_lock);
 477                         schedule();
 478                 } else
 479                         spin_unlock_irq(&priv->driver_lock);
 480
 481                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 482                                priv->currenttxskb, priv->dnld_sent);
 483
 484                 set_current_state(TASK_RUNNING);
 485                 remove_wait_queue(&priv->waitq, &wait);
 486
 487                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 488                                priv->currenttxskb, priv->dnld_sent);
 489
 490                 if (kthread_should_stop()) {
 491                         lbs_deb_thread("break from main thread\n");
 492                         break;
 493                 }
 494
 495                 if (priv->surpriseremoved) {
 496                         lbs_deb_thread("adapter removed; waiting to die...\n");
 497                         continue;
 498                 }
 499
 500                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 501                        priv->currenttxskb, priv->dnld_sent);
 502
 503                 /* Process any pending command response */
 504                 spin_lock_irq(&priv->driver_lock);
 505                 resp_idx = priv->resp_idx;
 506                 if (priv->resp_len[resp_idx]) {
 507                         spin_unlock_irq(&priv->driver_lock);
 508                         lbs_process_command_response(priv,
 509                                 priv->resp_buf[resp_idx],
 510                                 priv->resp_len[resp_idx]);
 511                         spin_lock_irq(&priv->driver_lock);
 512                         priv->resp_len[resp_idx] = 0;
 513                 }
 514                 spin_unlock_irq(&priv->driver_lock);
 515
 516                 /* Process hardware events, e.g. card removed, link lost */
 517                 spin_lock_irq(&priv->driver_lock);
 518                 while (kfifo_len(&priv->event_fifo)) {
 519                         u32 event;
 520
 521                         if (kfifo_out(&priv->event_fifo,
 522                                 (unsigned char *) &event, sizeof(event)) !=
 523                                 sizeof(event))
 524                                         break;
 525                         spin_unlock_irq(&priv->driver_lock);
 526                         lbs_process_event(priv, event);
 527                         spin_lock_irq(&priv->driver_lock);
 528                 }
 529                 spin_unlock_irq(&priv->driver_lock);
 530
 531                 if (priv->wakeup_dev_required) {
 532                         lbs_deb_thread("Waking up device...\n");
 533                         /* Wake up device */
 534                         if (priv->exit_deep_sleep(priv))
 535                                 lbs_deb_thread("Wakeup device failed\n");
 536                         continue;
 537                 }
 538
 539                 /* command timeout stuff */
 540                 if (priv->cmd_timed_out && priv->cur_cmd) {
 541                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 542
 543                         lbs_pr_info("Timeout submitting command 0x%04x\n",
 544                                 le16_to_cpu(cmdnode->cmdbuf->command));
 545                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 546                         if (priv->reset_card)
 547                                 priv->reset_card(priv);
 548                 }
 549                 priv->cmd_timed_out = 0;
 550
 551                 if (!priv->fw_ready)
 552                         continue;
 553
 554                 /* Check if we need to confirm Sleep Request received previously */
 555                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 556                     !priv->dnld_sent && !priv->cur_cmd) {
 557                         if (priv->connect_status == LBS_CONNECTED) {
 558                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 559                                         "dnld_sent %d, cur_cmd %p\n",
 560                                         priv->currenttxskb, priv->dnld_sent,
 561                                         priv->cur_cmd);
 562
 563                                 lbs_ps_confirm_sleep(priv);
 564                         } else {
 565                                 /* workaround for firmware sending
 566                                  * deauth/linkloss event immediately
 567                                  * after sleep request; remove this
 568                                  * after firmware fixes it
 569                                  */
 570                                 priv->psstate = PS_STATE_AWAKE;
 571                                 lbs_pr_alert("ignore PS_SleepConfirm in "
 572                                         "non-connected state\n");
 573                         }
 574                 }
 575
 576                 /* The PS state is changed during processing of Sleep Request
 577                  * event above
 578                  */
 579                 if ((priv->psstate == PS_STATE_SLEEP) ||
 580                     (priv->psstate == PS_STATE_PRE_SLEEP))
 581                         continue;
 582
 583                 if (priv->is_deep_sleep)
 584                         continue;
 585
 586                 /* Execute the next command */
 587                 if (!priv->dnld_sent && !priv->cur_cmd)
 588                         lbs_execute_next_command(priv);
 589
 590                 /* Wake-up command waiters which can't sleep in
 591                  * lbs_prepare_and_send_command
 592                  */
 593                 if (!list_empty(&priv->cmdpendingq))
 594                         wake_up_all(&priv->cmd_pending);
 595
 596                 spin_lock_irq(&priv->driver_lock);
 597                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 598                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 599                                                         priv->tx_pending_buf,
 600                                                         priv->tx_pending_len);
 601                         if (ret) {
 602                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 603                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 604                         }
 605                         priv->tx_pending_len = 0;
 606                         if (!priv->currenttxskb) {
 607                                 /* We can wake the queues immediately if we aren't
 608                                    waiting for TX feedback */
 609                                 if (priv->connect_status == LBS_CONNECTED)
 610                                         netif_wake_queue(priv->dev);
 611                                 if (priv->mesh_dev &&
 612                                     lbs_mesh_connected(priv))
 613                                         netif_wake_queue(priv->mesh_dev);
 614                         }
 615                 }
 616                 spin_unlock_irq(&priv->driver_lock);
 617         }
 618
 619         del_timer(&priv->command_timer);
 620         del_timer(&priv->auto_deepsleep_timer);
 621         wake_up_all(&priv->cmd_pending);
 622
 623         lbs_deb_leave(LBS_DEB_THREAD);
 624         return 0;
 625 }
 626
 627 static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
 628                                 struct cmd_header *cmd)
 629 {
 630         lbs_deb_enter(LBS_DEB_FW);
 631
 632         netif_device_detach(priv->dev);
 633         if (priv->mesh_dev)
 634                 netif_device_detach(priv->mesh_dev);
 635
 636         priv->fw_ready = 0;
 637         lbs_deb_leave(LBS_DEB_FW);
 638         return 0;
 639 }
 640
 641 int lbs_suspend(struct lbs_private *priv)
 642 {
 643         struct cmd_header cmd;
 644         int ret;
 645
 646         lbs_deb_enter(LBS_DEB_FW);
 647
 648         if (priv->wol_criteria == 0xffffffff) {
 649                 lbs_pr_info("Suspend attempt without configuring wake params!\n");
 650                 return -EINVAL;
 651         }
 652
 653         memset(&cmd, 0, sizeof(cmd));
 654
 655         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
 656                         sizeof(cmd), lbs_suspend_callback, 0);
 657         if (ret)
 658                 lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
 659
 660         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 661         return ret;
 662 }
 663 EXPORT_SYMBOL_GPL(lbs_suspend);
 664
 665 void lbs_resume(struct lbs_private *priv)
 666 {
 667         lbs_deb_enter(LBS_DEB_FW);
 668
 669         priv->fw_ready = 1;
 670
 671         /* Firmware doesn't seem to give us RX packets any more
 672            until we send it some command. Might as well update */
 673         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
 674                                      0, 0, NULL);
 675
 676         netif_device_attach(priv->dev);
 677         if (priv->mesh_dev)
 678                 netif_device_attach(priv->mesh_dev);
 679
 680         lbs_deb_leave(LBS_DEB_FW);
 681 }
 682 EXPORT_SYMBOL_GPL(lbs_resume);
 683
 684 /**
 685  * @brief This function gets the HW spec from the firmware and sets
 686  *        some basic parameters.
 687  *
 688  *  @param priv    A pointer to struct lbs_private structure
 689  *  @return        0 or -1
 690  */
 691 static int lbs_setup_firmware(struct lbs_private *priv)
 692 {
 693         int ret = -1;
 694         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 695
 696         lbs_deb_enter(LBS_DEB_FW);
 697
 698         /* Read MAC address from firmware */
 699         memset(priv->current_addr, 0xff, ETH_ALEN);
 700         ret = lbs_update_hw_spec(priv);
 701         if (ret)
 702                 goto done;
 703
 704         /* Read power levels if available */
 705         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 706         if (ret == 0) {
 707                 priv->txpower_cur = curlevel;
 708                 priv->txpower_min = minlevel;
 709                 priv->txpower_max = maxlevel;
 710         }
 711
 712         lbs_set_mac_control(priv);
 713 done:
 714         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 715         return ret;
 716 }
 717
 718 /**
 719  *  This function handles the timeout of command sending.
 720  *  It will re-send the same command again.
 721  */
 722 static void lbs_cmd_timeout_handler(unsigned long data)
 723 {
 724         struct lbs_private *priv = (struct lbs_private *)data;
 725         unsigned long flags;
 726
 727         lbs_deb_enter(LBS_DEB_CMD);
 728         spin_lock_irqsave(&priv->driver_lock, flags);
 729
 730         if (!priv->cur_cmd)
 731                 goto out;
 732
 733         lbs_pr_info("command 0x%04x timed out\n",
 734                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 735
 736         priv->cmd_timed_out = 1;
 737         wake_up_interruptible(&priv->waitq);
 738 out:
 739         spin_unlock_irqrestore(&priv->driver_lock, flags);
 740         lbs_deb_leave(LBS_DEB_CMD);
 741 }
 742
 743 /**
 744  *  This function put the device back to deep sleep mode when timer expires
 745  *  and no activity (command, event, data etc.) is detected.
 746  */
 747 static void auto_deepsleep_timer_fn(unsigned long data)
 748 {
 749         struct lbs_private *priv = (struct lbs_private *)data;
 750         int ret;
 751
 752         lbs_deb_enter(LBS_DEB_CMD);
 753
 754         if (priv->is_activity_detected) {
 755                 priv->is_activity_detected = 0;
 756         } else {
 757                 if (priv->is_auto_deep_sleep_enabled &&
 758                                 (!priv->wakeup_dev_required) &&
 759                                 (priv->connect_status != LBS_CONNECTED)) {
 760                         lbs_deb_main("Entering auto deep sleep mode...\n");
 761                         ret = lbs_prepare_and_send_command(priv,
 762                                         CMD_802_11_DEEP_SLEEP, 0,
 763                                         0, 0, NULL);
 764                         if (ret)
 765                                 lbs_pr_err("Enter Deep Sleep command failed\n");
 766                 }
 767         }
 768         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 769                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 770         lbs_deb_leave(LBS_DEB_CMD);
 771 }
 772
 773 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 774 {
 775         lbs_deb_enter(LBS_DEB_SDIO);
 776
 777         priv->is_auto_deep_sleep_enabled = 1;
 778         if (priv->is_deep_sleep)
 779                 priv->wakeup_dev_required = 1;
 780         mod_timer(&priv->auto_deepsleep_timer ,
 781                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 782
 783         lbs_deb_leave(LBS_DEB_SDIO);
 784         return 0;
 785 }
 786
 787 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 788 {
 789         lbs_deb_enter(LBS_DEB_SDIO);
 790
 791         priv->is_auto_deep_sleep_enabled = 0;
 792         priv->auto_deep_sleep_timeout = 0;
 793         del_timer(&priv->auto_deepsleep_timer);
 794
 795         lbs_deb_leave(LBS_DEB_SDIO);
 796         return 0;
 797 }
 798
 799 static int lbs_init_adapter(struct lbs_private *priv)
 800 {
 801         size_t bufsize;
 802         int i, ret = 0;
 803
 804         lbs_deb_enter(LBS_DEB_MAIN);
 805
 806         /* Allocate buffer to store the BSSID list */
 807         bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
 808         priv->networks = kzalloc(bufsize, GFP_KERNEL);
 809         if (!priv->networks) {
 810                 lbs_pr_err("Out of memory allocating beacons\n");
 811                 ret = -1;
 812                 goto out;
 813         }
 814
 815         /* Initialize scan result lists */
 816         INIT_LIST_HEAD(&priv->network_free_list);
 817         INIT_LIST_HEAD(&priv->network_list);
 818         for (i = 0; i < MAX_NETWORK_COUNT; i++) {
 819                 list_add_tail(&priv->networks[i].list,
 820                               &priv->network_free_list);
 821         }
 822
 823         memset(priv->current_addr, 0xff, ETH_ALEN);
 824
 825         priv->connect_status = LBS_DISCONNECTED;
 826         priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 827         priv->mode = IW_MODE_INFRA;
 828         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 829         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 830         priv->radio_on = 1;
 831         priv->enablehwauto = 1;
 832         priv->psmode = LBS802_11POWERMODECAM;
 833         priv->psstate = PS_STATE_FULL_POWER;
 834         priv->is_deep_sleep = 0;
 835         priv->is_auto_deep_sleep_enabled = 0;
 836         priv->wakeup_dev_required = 0;
 837         init_waitqueue_head(&priv->ds_awake_q);
 838         priv->authtype_auto = 1;
 839
 840         mutex_init(&priv->lock);
 841
 842         setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
 843                 (unsigned long)priv);
 844         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 845                         (unsigned long)priv);
 846
 847         INIT_LIST_HEAD(&priv->cmdfreeq);
 848         INIT_LIST_HEAD(&priv->cmdpendingq);
 849
 850         spin_lock_init(&priv->driver_lock);
 851         init_waitqueue_head(&priv->cmd_pending);
 852
 853         /* Allocate the command buffers */
 854         if (lbs_allocate_cmd_buffer(priv)) {
 855                 lbs_pr_err("Out of memory allocating command buffers\n");
 856                 ret = -ENOMEM;
 857                 goto out;
 858         }
 859         priv->resp_idx = 0;
 860         priv->resp_len[0] = priv->resp_len[1] = 0;
 861
 862         /* Create the event FIFO */
 863         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 864         if (ret) {
 865                 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
 866                 goto out;
 867         }
 868
 869 out:
 870         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 871
 872         return ret;
 873 }
 874
 875 static void lbs_free_adapter(struct lbs_private *priv)
 876 {
 877         lbs_deb_enter(LBS_DEB_MAIN);
 878
 879         lbs_free_cmd_buffer(priv);
 880         kfifo_free(&priv->event_fifo);
 881         del_timer(&priv->command_timer);
 882         del_timer(&priv->auto_deepsleep_timer);
 883         kfree(priv->networks);
 884         priv->networks = NULL;
 885
 886         lbs_deb_leave(LBS_DEB_MAIN);
 887 }
 888
 889 static const struct net_device_ops lbs_netdev_ops = {
 890         .ndo_open               = lbs_dev_open,
 891         .ndo_stop               = lbs_eth_stop,
 892         .ndo_start_xmit         = lbs_hard_start_xmit,
 893         .ndo_set_mac_address    = lbs_set_mac_address,
 894         .ndo_tx_timeout         = lbs_tx_timeout,
 895         .ndo_set_multicast_list = lbs_set_multicast_list,
 896         .ndo_change_mtu         = eth_change_mtu,
 897         .ndo_validate_addr      = eth_validate_addr,
 898 };
 899
 900 /**
 901  * @brief This function adds the card. it will probe the
 902  * card, allocate the lbs_priv and initialize the device.
 903  *
 904  *  @param card    A pointer to card
 905  *  @return        A pointer to struct lbs_private structure
 906  */
 907 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 908 {
 909         struct net_device *dev;
 910         struct wireless_dev *wdev;
 911         struct lbs_private *priv = NULL;
 912
 913         lbs_deb_enter(LBS_DEB_MAIN);
 914
 915         /* Allocate an Ethernet device and register it */
 916         wdev = lbs_cfg_alloc(dmdev);
 917         if (IS_ERR(wdev)) {
 918                 lbs_pr_err("cfg80211 init failed\n");
 919                 goto done;
 920         }
 921         /* TODO? */
 922         wdev->iftype = NL80211_IFTYPE_STATION;
 923         priv = wdev_priv(wdev);
 924         priv->wdev = wdev;
 925
 926         if (lbs_init_adapter(priv)) {
 927                 lbs_pr_err("failed to initialize adapter structure.\n");
 928                 goto err_wdev;
 929         }
 930
 931         //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
 932         dev = alloc_netdev(0, "wlan%d", ether_setup);
 933         if (!dev) {
 934                 dev_err(dmdev, "no memory for network device instance\n");
 935                 goto err_adapter;
 936         }
 937
 938         dev->ieee80211_ptr = wdev;
 939         dev->ml_priv = priv;
 940         SET_NETDEV_DEV(dev, dmdev);
 941         wdev->netdev = dev;
 942         priv->dev = dev;
 943
 944         dev->netdev_ops = &lbs_netdev_ops;
 945         dev->watchdog_timeo = 5 * HZ;
 946         dev->ethtool_ops = &lbs_ethtool_ops;
 947 #ifdef  WIRELESS_EXT
 948         dev->wireless_handlers = &lbs_handler_def;
 949 #endif
 950         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 951
 952
 953         // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
 954
 955
 956         priv->card = card;
 957         priv->infra_open = 0;
 958
 959
 960         priv->rtap_net_dev = NULL;
 961         strcpy(dev->name, "wlan%d");
 962
 963         lbs_deb_thread("Starting main thread...\n");
 964         init_waitqueue_head(&priv->waitq);
 965         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 966         if (IS_ERR(priv->main_thread)) {
 967                 lbs_deb_thread("Error creating main thread.\n");
 968                 goto err_ndev;
 969         }
 970
 971         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 972         INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
 973         INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
 974         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 975
 976         priv->wol_criteria = 0xffffffff;
 977         priv->wol_gpio = 0xff;
 978
 979         goto done;
 980
 981  err_ndev:
 982         free_netdev(dev);
 983
 984  err_adapter:
 985         lbs_free_adapter(priv);
 986
 987  err_wdev:
 988         lbs_cfg_free(priv);
 989
 990         priv = NULL;
 991
 992 done:
 993         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
 994         return priv;
 995 }
 996 EXPORT_SYMBOL_GPL(lbs_add_card);
 997
 998
 999 void lbs_remove_card(struct lbs_private *priv)
1000 {
1001         struct net_device *dev = priv->dev;
1002
1003         lbs_deb_enter(LBS_DEB_MAIN);
1004
1005         lbs_remove_mesh(priv);
1006         lbs_remove_rtap(priv);
1007
1008         dev = priv->dev;
1009
1010         cancel_delayed_work_sync(&priv->scan_work);
1011         cancel_delayed_work_sync(&priv->assoc_work);
1012         cancel_work_sync(&priv->mcast_work);
1013
1014         /* worker thread destruction blocks on the in-flight command which
1015          * should have been cleared already in lbs_stop_card().
1016          */
1017         lbs_deb_main("destroying worker thread\n");
1018         destroy_workqueue(priv->work_thread);
1019         lbs_deb_main("done destroying worker thread\n");
1020
1021         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1022                 priv->psmode = LBS802_11POWERMODECAM;
1023                 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1024         }
1025
1026         lbs_send_disconnect_notification(priv);
1027
1028         if (priv->is_deep_sleep) {
1029                 priv->is_deep_sleep = 0;
1030                 wake_up_interruptible(&priv->ds_awake_q);
1031         }
1032
1033         /* Stop the thread servicing the interrupts */
1034         priv->surpriseremoved = 1;
1035         kthread_stop(priv->main_thread);
1036
1037         lbs_free_adapter(priv);
1038         lbs_cfg_free(priv);
1039
1040         priv->dev = NULL;
1041         free_netdev(dev);
1042
1043         lbs_deb_leave(LBS_DEB_MAIN);
1044 }
1045 EXPORT_SYMBOL_GPL(lbs_remove_card);
1046
1047
1048 static int lbs_rtap_supported(struct lbs_private *priv)
1049 {
1050         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1051                 return 1;
1052
1053         /* newer firmware use a capability mask */
1054         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1055                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1056 }
1057
1058
1059 int lbs_start_card(struct lbs_private *priv)
1060 {
1061         struct net_device *dev = priv->dev;
1062         int ret = -1;
1063
1064         lbs_deb_enter(LBS_DEB_MAIN);
1065
1066         /* poke the firmware */
1067         ret = lbs_setup_firmware(priv);
1068         if (ret)
1069                 goto done;
1070
1071         if (lbs_cfg_register(priv)) {
1072                 lbs_pr_err("cannot register device\n");
1073                 goto done;
1074         }
1075
1076         lbs_update_channel(priv);
1077
1078         lbs_init_mesh(priv);
1079
1080         /*
1081          * While rtap isn't related to mesh, only mesh-enabled
1082          * firmware implements the rtap functionality via
1083          * CMD_802_11_MONITOR_MODE.
1084          */
1085         if (lbs_rtap_supported(priv)) {
1086                 if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
1087                         lbs_pr_err("cannot register lbs_rtap attribute\n");
1088         }
1089
1090         lbs_debugfs_init_one(priv, dev);
1091
1092         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
1093
1094         ret = 0;
1095
1096 done:
1097         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1098         return ret;
1099 }
1100 EXPORT_SYMBOL_GPL(lbs_start_card);
1101
1102
1103 void lbs_stop_card(struct lbs_private *priv)
1104 {
1105         struct net_device *dev;
1106         struct cmd_ctrl_node *cmdnode;
1107         unsigned long flags;
1108
1109         lbs_deb_enter(LBS_DEB_MAIN);
1110
1111         if (!priv)
1112                 goto out;
1113         dev = priv->dev;
1114
1115         netif_stop_queue(dev);
1116         netif_carrier_off(dev);
1117
1118         lbs_debugfs_remove_one(priv);
1119         lbs_deinit_mesh(priv);
1120
1121         if (lbs_rtap_supported(priv))
1122                 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1123
1124         /* Delete the timeout of the currently processing command */
1125         del_timer_sync(&priv->command_timer);
1126         del_timer_sync(&priv->auto_deepsleep_timer);
1127
1128         /* Flush pending command nodes */
1129         spin_lock_irqsave(&priv->driver_lock, flags);
1130         lbs_deb_main("clearing pending commands\n");
1131         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1132                 cmdnode->result = -ENOENT;
1133                 cmdnode->cmdwaitqwoken = 1;
1134                 wake_up_interruptible(&cmdnode->cmdwait_q);
1135         }
1136
1137         /* Flush the command the card is currently processing */
1138         if (priv->cur_cmd) {
1139                 lbs_deb_main("clearing current command\n");
1140                 priv->cur_cmd->result = -ENOENT;
1141                 priv->cur_cmd->cmdwaitqwoken = 1;
1142                 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1143         }
1144         lbs_deb_main("done clearing commands\n");
1145         spin_unlock_irqrestore(&priv->driver_lock, flags);
1146
1147         unregister_netdev(dev);
1148
1149 out:
1150         lbs_deb_leave(LBS_DEB_MAIN);
1151 }
1152 EXPORT_SYMBOL_GPL(lbs_stop_card);
1153
1154
1155 void lbs_queue_event(struct lbs_private *priv, u32 event)
1156 {
1157         unsigned long flags;
1158
1159         lbs_deb_enter(LBS_DEB_THREAD);
1160         spin_lock_irqsave(&priv->driver_lock, flags);
1161
1162         if (priv->psstate == PS_STATE_SLEEP)
1163                 priv->psstate = PS_STATE_AWAKE;
1164
1165         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1166
1167         wake_up_interruptible(&priv->waitq);
1168
1169         spin_unlock_irqrestore(&priv->driver_lock, flags);
1170         lbs_deb_leave(LBS_DEB_THREAD);
1171 }
1172 EXPORT_SYMBOL_GPL(lbs_queue_event);
1173
1174 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1175 {
1176         lbs_deb_enter(LBS_DEB_THREAD);
1177
1178         if (priv->psstate == PS_STATE_SLEEP)
1179                 priv->psstate = PS_STATE_AWAKE;
1180
1181         /* Swap buffers by flipping the response index */
1182         BUG_ON(resp_idx > 1);
1183         priv->resp_idx = resp_idx;
1184
1185         wake_up_interruptible(&priv->waitq);
1186
1187         lbs_deb_leave(LBS_DEB_THREAD);
1188 }
1189 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1190
1191 static int __init lbs_init_module(void)
1192 {
1193         lbs_deb_enter(LBS_DEB_MAIN);
1194         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1195         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1196         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1197         confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1198         lbs_debugfs_init();
1199         lbs_deb_leave(LBS_DEB_MAIN);
1200         return 0;
1201 }
1202
1203 static void __exit lbs_exit_module(void)
1204 {
1205         lbs_deb_enter(LBS_DEB_MAIN);
1206         lbs_debugfs_remove();
1207         lbs_deb_leave(LBS_DEB_MAIN);
1208 }
1209
1210 /*
1211  * rtap interface support fuctions
1212  */
1213
1214 static int lbs_rtap_open(struct net_device *dev)
1215 {
1216         /* Yes, _stop_ the queue. Because we don't support injection */
1217         lbs_deb_enter(LBS_DEB_MAIN);
1218         netif_carrier_off(dev);
1219         netif_stop_queue(dev);
1220         lbs_deb_leave(LBS_DEB_LEAVE);
1221         return 0;
1222 }
1223
1224 static int lbs_rtap_stop(struct net_device *dev)
1225 {
1226         lbs_deb_enter(LBS_DEB_MAIN);
1227         lbs_deb_leave(LBS_DEB_MAIN);
1228         return 0;
1229 }
1230
1231 static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
1232                                             struct net_device *dev)
1233 {
1234         netif_stop_queue(dev);
1235         return NETDEV_TX_BUSY;
1236 }
1237
1238 static void lbs_remove_rtap(struct lbs_private *priv)
1239 {
1240         lbs_deb_enter(LBS_DEB_MAIN);
1241         if (priv->rtap_net_dev == NULL)
1242                 goto out;
1243         unregister_netdev(priv->rtap_net_dev);
1244         free_netdev(priv->rtap_net_dev);
1245         priv->rtap_net_dev = NULL;
1246 out:
1247         lbs_deb_leave(LBS_DEB_MAIN);
1248 }
1249
1250 static const struct net_device_ops rtap_netdev_ops = {
1251         .ndo_open = lbs_rtap_open,
1252         .ndo_stop = lbs_rtap_stop,
1253         .ndo_start_xmit = lbs_rtap_hard_start_xmit,
1254 };
1255
1256 static int lbs_add_rtap(struct lbs_private *priv)
1257 {
1258         int ret = 0;
1259         struct net_device *rtap_dev;
1260
1261         lbs_deb_enter(LBS_DEB_MAIN);
1262         if (priv->rtap_net_dev) {
1263                 ret = -EPERM;
1264                 goto out;
1265         }
1266
1267         rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
1268         if (rtap_dev == NULL) {
1269                 ret = -ENOMEM;
1270                 goto out;
1271         }
1272
1273         memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
1274         rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
1275         rtap_dev->netdev_ops = &rtap_netdev_ops;
1276         rtap_dev->ml_priv = priv;
1277         SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
1278
1279         ret = register_netdev(rtap_dev);
1280         if (ret) {
1281                 free_netdev(rtap_dev);
1282                 goto out;
1283         }
1284         priv->rtap_net_dev = rtap_dev;
1285
1286 out:
1287         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1288         return ret;
1289 }
1290
1291 module_init(lbs_init_module);
1292 module_exit(lbs_exit_module);
1293
1294 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1295 MODULE_AUTHOR("Marvell International Ltd.");
1296 MODULE_LICENSE("GPL");