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 || priv->mesh_open)
 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 dev_mc_list *mc_list;
 322
 323         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 324                 return nr_addrs;
 325
 326         netif_addr_lock_bh(dev);
 327         for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) {
 328                 if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) {
 329                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 330                                     mc_list->dmi_addr);
 331                         continue;
 332                 }
 333
 334                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 335                         break;
 336                 memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN);
 337                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 338                             mc_list->dmi_addr);
 339                 i++;
 340         }
 341         netif_addr_unlock_bh(dev);
 342         if (mc_list)
 343                 return -EOVERFLOW;
 344
 345         return i;
 346 }
 347
 348 static void lbs_set_mcast_worker(struct work_struct *work)
 349 {
 350         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 351         struct cmd_ds_mac_multicast_adr mcast_cmd;
 352         int dev_flags;
 353         int nr_addrs;
 354         int old_mac_control = priv->mac_control;
 355
 356         lbs_deb_enter(LBS_DEB_NET);
 357
 358         dev_flags = priv->dev->flags;
 359         if (priv->mesh_dev)
 360                 dev_flags |= priv->mesh_dev->flags;
 361
 362         if (dev_flags & IFF_PROMISC) {
 363                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 364                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 365                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 366                 goto out_set_mac_control;
 367         } else if (dev_flags & IFF_ALLMULTI) {
 368         do_allmulti:
 369                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 370                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 371                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 372                 goto out_set_mac_control;
 373         }
 374
 375         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 376         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 377         if (nr_addrs >= 0 && priv->mesh_dev)
 378                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 379         if (nr_addrs < 0)
 380                 goto do_allmulti;
 381
 382         if (nr_addrs) {
 383                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 384                                     maclist[6*nr_addrs]);
 385
 386                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 387                 mcast_cmd.hdr.size = cpu_to_le16(size);
 388                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 389
 390                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 391
 392                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 393         } else
 394                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 395
 396         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 397                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 398  out_set_mac_control:
 399         if (priv->mac_control != old_mac_control)
 400                 lbs_set_mac_control(priv);
 401
 402         lbs_deb_leave(LBS_DEB_NET);
 403 }
 404
 405 void lbs_set_multicast_list(struct net_device *dev)
 406 {
 407         struct lbs_private *priv = dev->ml_priv;
 408
 409         schedule_work(&priv->mcast_work);
 410 }
 411
 412 /**
 413  *  @brief This function handles the major jobs in the LBS driver.
 414  *  It handles all events generated by firmware, RX data received
 415  *  from firmware and TX data sent from kernel.
 416  *
 417  *  @param data    A pointer to lbs_thread structure
 418  *  @return        0
 419  */
 420 static int lbs_thread(void *data)
 421 {
 422         struct net_device *dev = data;
 423         struct lbs_private *priv = dev->ml_priv;
 424         wait_queue_t wait;
 425
 426         lbs_deb_enter(LBS_DEB_THREAD);
 427
 428         init_waitqueue_entry(&wait, current);
 429
 430         for (;;) {
 431                 int shouldsleep;
 432                 u8 resp_idx;
 433
 434                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 435                                 priv->currenttxskb, priv->dnld_sent);
 436
 437                 add_wait_queue(&priv->waitq, &wait);
 438                 set_current_state(TASK_INTERRUPTIBLE);
 439                 spin_lock_irq(&priv->driver_lock);
 440
 441                 if (kthread_should_stop())
 442                         shouldsleep = 0;        /* Bye */
 443                 else if (priv->surpriseremoved)
 444                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 445                 else if (priv->psstate == PS_STATE_SLEEP)
 446                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 447                 else if (priv->cmd_timed_out)
 448                         shouldsleep = 0;        /* Command timed out. Recover */
 449                 else if (!priv->fw_ready)
 450                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 451                 else if (priv->dnld_sent)
 452                         shouldsleep = 1;        /* Something is en route to the device already */
 453                 else if (priv->tx_pending_len > 0)
 454                         shouldsleep = 0;        /* We've a packet to send */
 455                 else if (priv->resp_len[priv->resp_idx])
 456                         shouldsleep = 0;        /* We have a command response */
 457                 else if (priv->cur_cmd)
 458                         shouldsleep = 1;        /* Can't send a command; one already running */
 459                 else if (!list_empty(&priv->cmdpendingq) &&
 460                                         !(priv->wakeup_dev_required))
 461                         shouldsleep = 0;        /* We have a command to send */
 462                 else if (kfifo_len(&priv->event_fifo))
 463                         shouldsleep = 0;        /* We have an event to process */
 464                 else
 465                         shouldsleep = 1;        /* No command */
 466
 467                 if (shouldsleep) {
 468                         lbs_deb_thread("sleeping, connect_status %d, "
 469                                 "psmode %d, psstate %d\n",
 470                                 priv->connect_status,
 471                                 priv->psmode, priv->psstate);
 472                         spin_unlock_irq(&priv->driver_lock);
 473                         schedule();
 474                 } else
 475                         spin_unlock_irq(&priv->driver_lock);
 476
 477                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 478                                priv->currenttxskb, priv->dnld_sent);
 479
 480                 set_current_state(TASK_RUNNING);
 481                 remove_wait_queue(&priv->waitq, &wait);
 482
 483                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 484                                priv->currenttxskb, priv->dnld_sent);
 485
 486                 if (kthread_should_stop()) {
 487                         lbs_deb_thread("break from main thread\n");
 488                         break;
 489                 }
 490
 491                 if (priv->surpriseremoved) {
 492                         lbs_deb_thread("adapter removed; waiting to die...\n");
 493                         continue;
 494                 }
 495
 496                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 497                        priv->currenttxskb, priv->dnld_sent);
 498
 499                 /* Process any pending command response */
 500                 spin_lock_irq(&priv->driver_lock);
 501                 resp_idx = priv->resp_idx;
 502                 if (priv->resp_len[resp_idx]) {
 503                         spin_unlock_irq(&priv->driver_lock);
 504                         lbs_process_command_response(priv,
 505                                 priv->resp_buf[resp_idx],
 506                                 priv->resp_len[resp_idx]);
 507                         spin_lock_irq(&priv->driver_lock);
 508                         priv->resp_len[resp_idx] = 0;
 509                 }
 510                 spin_unlock_irq(&priv->driver_lock);
 511
 512                 /* Process hardware events, e.g. card removed, link lost */
 513                 spin_lock_irq(&priv->driver_lock);
 514                 while (kfifo_len(&priv->event_fifo)) {
 515                         u32 event;
 516
 517                         kfifo_out(&priv->event_fifo, (unsigned char *) &event,
 518                                 sizeof(event));
 519                         spin_unlock_irq(&priv->driver_lock);
 520                         lbs_process_event(priv, event);
 521                         spin_lock_irq(&priv->driver_lock);
 522                 }
 523                 spin_unlock_irq(&priv->driver_lock);
 524
 525                 if (priv->wakeup_dev_required) {
 526                         lbs_deb_thread("Waking up device...\n");
 527                         /* Wake up device */
 528                         if (priv->exit_deep_sleep(priv))
 529                                 lbs_deb_thread("Wakeup device failed\n");
 530                         continue;
 531                 }
 532
 533                 /* command timeout stuff */
 534                 if (priv->cmd_timed_out && priv->cur_cmd) {
 535                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 536
 537                         if (++priv->nr_retries > 3) {
 538                                 lbs_pr_info("Excessive timeouts submitting "
 539                                         "command 0x%04x\n",
 540                                         le16_to_cpu(cmdnode->cmdbuf->command));
 541                                 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 542                                 priv->nr_retries = 0;
 543                                 if (priv->reset_card)
 544                                         priv->reset_card(priv);
 545                         } else {
 546                                 priv->cur_cmd = NULL;
 547                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 548                                 lbs_pr_info("requeueing command 0x%04x due "
 549                                         "to timeout (#%d)\n",
 550                                         le16_to_cpu(cmdnode->cmdbuf->command),
 551                                         priv->nr_retries);
 552
 553                                 /* Stick it back at the _top_ of the pending queue
 554                                    for immediate resubmission */
 555                                 list_add(&cmdnode->list, &priv->cmdpendingq);
 556                         }
 557                 }
 558                 priv->cmd_timed_out = 0;
 559
 560
 561
 562                 if (!priv->fw_ready)
 563                         continue;
 564
 565                 /* Check if we need to confirm Sleep Request received previously */
 566                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 567                     !priv->dnld_sent && !priv->cur_cmd) {
 568                         if (priv->connect_status == LBS_CONNECTED) {
 569                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 570                                         "dnld_sent %d, cur_cmd %p\n",
 571                                         priv->currenttxskb, priv->dnld_sent,
 572                                         priv->cur_cmd);
 573
 574                                 lbs_ps_confirm_sleep(priv);
 575                         } else {
 576                                 /* workaround for firmware sending
 577                                  * deauth/linkloss event immediately
 578                                  * after sleep request; remove this
 579                                  * after firmware fixes it
 580                                  */
 581                                 priv->psstate = PS_STATE_AWAKE;
 582                                 lbs_pr_alert("ignore PS_SleepConfirm in "
 583                                         "non-connected state\n");
 584                         }
 585                 }
 586
 587                 /* The PS state is changed during processing of Sleep Request
 588                  * event above
 589                  */
 590                 if ((priv->psstate == PS_STATE_SLEEP) ||
 591                     (priv->psstate == PS_STATE_PRE_SLEEP))
 592                         continue;
 593
 594                 if (priv->is_deep_sleep)
 595                         continue;
 596
 597                 /* Execute the next command */
 598                 if (!priv->dnld_sent && !priv->cur_cmd)
 599                         lbs_execute_next_command(priv);
 600
 601                 /* Wake-up command waiters which can't sleep in
 602                  * lbs_prepare_and_send_command
 603                  */
 604                 if (!list_empty(&priv->cmdpendingq))
 605                         wake_up_all(&priv->cmd_pending);
 606
 607                 spin_lock_irq(&priv->driver_lock);
 608                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 609                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 610                                                         priv->tx_pending_buf,
 611                                                         priv->tx_pending_len);
 612                         if (ret) {
 613                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 614                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 615                         }
 616                         priv->tx_pending_len = 0;
 617                         if (!priv->currenttxskb) {
 618                                 /* We can wake the queues immediately if we aren't
 619                                    waiting for TX feedback */
 620                                 if (priv->connect_status == LBS_CONNECTED)
 621                                         netif_wake_queue(priv->dev);
 622                                 if (priv->mesh_dev &&
 623                                     priv->mesh_connect_status == LBS_CONNECTED)
 624                                         netif_wake_queue(priv->mesh_dev);
 625                         }
 626                 }
 627                 spin_unlock_irq(&priv->driver_lock);
 628         }
 629
 630         del_timer(&priv->command_timer);
 631         del_timer(&priv->auto_deepsleep_timer);
 632         wake_up_all(&priv->cmd_pending);
 633
 634         lbs_deb_leave(LBS_DEB_THREAD);
 635         return 0;
 636 }
 637
 638 static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
 639                                 struct cmd_header *cmd)
 640 {
 641         lbs_deb_enter(LBS_DEB_FW);
 642
 643         netif_device_detach(priv->dev);
 644         if (priv->mesh_dev)
 645                 netif_device_detach(priv->mesh_dev);
 646
 647         priv->fw_ready = 0;
 648         lbs_deb_leave(LBS_DEB_FW);
 649         return 0;
 650 }
 651
 652 int lbs_suspend(struct lbs_private *priv)
 653 {
 654         struct cmd_header cmd;
 655         int ret;
 656
 657         lbs_deb_enter(LBS_DEB_FW);
 658
 659         if (priv->wol_criteria == 0xffffffff) {
 660                 lbs_pr_info("Suspend attempt without configuring wake params!\n");
 661                 return -EINVAL;
 662         }
 663
 664         memset(&cmd, 0, sizeof(cmd));
 665
 666         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
 667                         sizeof(cmd), lbs_suspend_callback, 0);
 668         if (ret)
 669                 lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
 670
 671         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 672         return ret;
 673 }
 674 EXPORT_SYMBOL_GPL(lbs_suspend);
 675
 676 void lbs_resume(struct lbs_private *priv)
 677 {
 678         lbs_deb_enter(LBS_DEB_FW);
 679
 680         priv->fw_ready = 1;
 681
 682         /* Firmware doesn't seem to give us RX packets any more
 683            until we send it some command. Might as well update */
 684         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
 685                                      0, 0, NULL);
 686
 687         netif_device_attach(priv->dev);
 688         if (priv->mesh_dev)
 689                 netif_device_attach(priv->mesh_dev);
 690
 691         lbs_deb_leave(LBS_DEB_FW);
 692 }
 693 EXPORT_SYMBOL_GPL(lbs_resume);
 694
 695 /**
 696  * @brief This function gets the HW spec from the firmware and sets
 697  *        some basic parameters.
 698  *
 699  *  @param priv    A pointer to struct lbs_private structure
 700  *  @return        0 or -1
 701  */
 702 static int lbs_setup_firmware(struct lbs_private *priv)
 703 {
 704         int ret = -1;
 705         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 706
 707         lbs_deb_enter(LBS_DEB_FW);
 708
 709         /* Read MAC address from firmware */
 710         memset(priv->current_addr, 0xff, ETH_ALEN);
 711         ret = lbs_update_hw_spec(priv);
 712         if (ret)
 713                 goto done;
 714
 715         /* Read power levels if available */
 716         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 717         if (ret == 0) {
 718                 priv->txpower_cur = curlevel;
 719                 priv->txpower_min = minlevel;
 720                 priv->txpower_max = maxlevel;
 721         }
 722
 723         lbs_set_mac_control(priv);
 724 done:
 725         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 726         return ret;
 727 }
 728
 729 /**
 730  *  This function handles the timeout of command sending.
 731  *  It will re-send the same command again.
 732  */
 733 static void command_timer_fn(unsigned long data)
 734 {
 735         struct lbs_private *priv = (struct lbs_private *)data;
 736         unsigned long flags;
 737
 738         lbs_deb_enter(LBS_DEB_CMD);
 739         spin_lock_irqsave(&priv->driver_lock, flags);
 740
 741         if (!priv->cur_cmd)
 742                 goto out;
 743
 744         lbs_pr_info("command 0x%04x timed out\n",
 745                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 746
 747         priv->cmd_timed_out = 1;
 748         wake_up_interruptible(&priv->waitq);
 749 out:
 750         spin_unlock_irqrestore(&priv->driver_lock, flags);
 751         lbs_deb_leave(LBS_DEB_CMD);
 752 }
 753
 754 /**
 755  *  This function put the device back to deep sleep mode when timer expires
 756  *  and no activity (command, event, data etc.) is detected.
 757  */
 758 static void auto_deepsleep_timer_fn(unsigned long data)
 759 {
 760         struct lbs_private *priv = (struct lbs_private *)data;
 761         int ret;
 762
 763         lbs_deb_enter(LBS_DEB_CMD);
 764
 765         if (priv->is_activity_detected) {
 766                 priv->is_activity_detected = 0;
 767         } else {
 768                 if (priv->is_auto_deep_sleep_enabled &&
 769                                 (!priv->wakeup_dev_required) &&
 770                                 (priv->connect_status != LBS_CONNECTED)) {
 771                         lbs_deb_main("Entering auto deep sleep mode...\n");
 772                         ret = lbs_prepare_and_send_command(priv,
 773                                         CMD_802_11_DEEP_SLEEP, 0,
 774                                         0, 0, NULL);
 775                         if (ret)
 776                                 lbs_pr_err("Enter Deep Sleep command failed\n");
 777                 }
 778         }
 779         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 780                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 781         lbs_deb_leave(LBS_DEB_CMD);
 782 }
 783
 784 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 785 {
 786         lbs_deb_enter(LBS_DEB_SDIO);
 787
 788         priv->is_auto_deep_sleep_enabled = 1;
 789         if (priv->is_deep_sleep)
 790                 priv->wakeup_dev_required = 1;
 791         mod_timer(&priv->auto_deepsleep_timer ,
 792                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 793
 794         lbs_deb_leave(LBS_DEB_SDIO);
 795         return 0;
 796 }
 797
 798 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 799 {
 800         lbs_deb_enter(LBS_DEB_SDIO);
 801
 802         priv->is_auto_deep_sleep_enabled = 0;
 803         priv->auto_deep_sleep_timeout = 0;
 804         del_timer(&priv->auto_deepsleep_timer);
 805
 806         lbs_deb_leave(LBS_DEB_SDIO);
 807         return 0;
 808 }
 809
 810 static void lbs_sync_channel_worker(struct work_struct *work)
 811 {
 812         struct lbs_private *priv = container_of(work, struct lbs_private,
 813                 sync_channel);
 814
 815         lbs_deb_enter(LBS_DEB_MAIN);
 816         if (lbs_update_channel(priv))
 817                 lbs_pr_info("Channel synchronization failed.");
 818         lbs_deb_leave(LBS_DEB_MAIN);
 819 }
 820
 821
 822 static int lbs_init_adapter(struct lbs_private *priv)
 823 {
 824         size_t bufsize;
 825         int i, ret = 0;
 826
 827         lbs_deb_enter(LBS_DEB_MAIN);
 828
 829         /* Allocate buffer to store the BSSID list */
 830         bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
 831         priv->networks = kzalloc(bufsize, GFP_KERNEL);
 832         if (!priv->networks) {
 833                 lbs_pr_err("Out of memory allocating beacons\n");
 834                 ret = -1;
 835                 goto out;
 836         }
 837
 838         /* Initialize scan result lists */
 839         INIT_LIST_HEAD(&priv->network_free_list);
 840         INIT_LIST_HEAD(&priv->network_list);
 841         for (i = 0; i < MAX_NETWORK_COUNT; i++) {
 842                 list_add_tail(&priv->networks[i].list,
 843                               &priv->network_free_list);
 844         }
 845
 846         memset(priv->current_addr, 0xff, ETH_ALEN);
 847
 848         priv->connect_status = LBS_DISCONNECTED;
 849         priv->mesh_connect_status = LBS_DISCONNECTED;
 850         priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 851         priv->mode = IW_MODE_INFRA;
 852         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 853         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 854         priv->radio_on = 1;
 855         priv->enablehwauto = 1;
 856         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 857         priv->psmode = LBS802_11POWERMODECAM;
 858         priv->psstate = PS_STATE_FULL_POWER;
 859         priv->is_deep_sleep = 0;
 860         priv->is_auto_deep_sleep_enabled = 0;
 861         priv->wakeup_dev_required = 0;
 862         init_waitqueue_head(&priv->ds_awake_q);
 863
 864         mutex_init(&priv->lock);
 865
 866         setup_timer(&priv->command_timer, command_timer_fn,
 867                 (unsigned long)priv);
 868         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 869                         (unsigned long)priv);
 870
 871         INIT_LIST_HEAD(&priv->cmdfreeq);
 872         INIT_LIST_HEAD(&priv->cmdpendingq);
 873
 874         spin_lock_init(&priv->driver_lock);
 875         init_waitqueue_head(&priv->cmd_pending);
 876
 877         /* Allocate the command buffers */
 878         if (lbs_allocate_cmd_buffer(priv)) {
 879                 lbs_pr_err("Out of memory allocating command buffers\n");
 880                 ret = -ENOMEM;
 881                 goto out;
 882         }
 883         priv->resp_idx = 0;
 884         priv->resp_len[0] = priv->resp_len[1] = 0;
 885
 886         /* Create the event FIFO */
 887         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 888         if (ret) {
 889                 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
 890                 goto out;
 891         }
 892
 893 out:
 894         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 895
 896         return ret;
 897 }
 898
 899 static void lbs_free_adapter(struct lbs_private *priv)
 900 {
 901         lbs_deb_enter(LBS_DEB_MAIN);
 902
 903         lbs_free_cmd_buffer(priv);
 904         kfifo_free(&priv->event_fifo);
 905         del_timer(&priv->command_timer);
 906         del_timer(&priv->auto_deepsleep_timer);
 907         kfree(priv->networks);
 908         priv->networks = NULL;
 909
 910         lbs_deb_leave(LBS_DEB_MAIN);
 911 }
 912
 913 static const struct net_device_ops lbs_netdev_ops = {
 914         .ndo_open               = lbs_dev_open,
 915         .ndo_stop               = lbs_eth_stop,
 916         .ndo_start_xmit         = lbs_hard_start_xmit,
 917         .ndo_set_mac_address    = lbs_set_mac_address,
 918         .ndo_tx_timeout         = lbs_tx_timeout,
 919         .ndo_set_multicast_list = lbs_set_multicast_list,
 920         .ndo_change_mtu         = eth_change_mtu,
 921         .ndo_validate_addr      = eth_validate_addr,
 922 };
 923
 924 /**
 925  * @brief This function adds the card. it will probe the
 926  * card, allocate the lbs_priv and initialize the device.
 927  *
 928  *  @param card    A pointer to card
 929  *  @return        A pointer to struct lbs_private structure
 930  */
 931 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 932 {
 933         struct net_device *dev;
 934         struct wireless_dev *wdev;
 935         struct lbs_private *priv = NULL;
 936
 937         lbs_deb_enter(LBS_DEB_MAIN);
 938
 939         /* Allocate an Ethernet device and register it */
 940         wdev = lbs_cfg_alloc(dmdev);
 941         if (IS_ERR(wdev)) {
 942                 lbs_pr_err("cfg80211 init failed\n");
 943                 goto done;
 944         }
 945         /* TODO? */
 946         wdev->iftype = NL80211_IFTYPE_STATION;
 947         priv = wdev_priv(wdev);
 948         priv->wdev = wdev;
 949
 950         if (lbs_init_adapter(priv)) {
 951                 lbs_pr_err("failed to initialize adapter structure.\n");
 952                 goto err_wdev;
 953         }
 954
 955         //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
 956         dev = alloc_netdev(0, "wlan%d", ether_setup);
 957         if (!dev) {
 958                 dev_err(dmdev, "no memory for network device instance\n");
 959                 goto err_adapter;
 960         }
 961
 962         dev->ieee80211_ptr = wdev;
 963         dev->ml_priv = priv;
 964         SET_NETDEV_DEV(dev, dmdev);
 965         wdev->netdev = dev;
 966         priv->dev = dev;
 967
 968         dev->netdev_ops = &lbs_netdev_ops;
 969         dev->watchdog_timeo = 5 * HZ;
 970         dev->ethtool_ops = &lbs_ethtool_ops;
 971 #ifdef  WIRELESS_EXT
 972         dev->wireless_handlers = &lbs_handler_def;
 973 #endif
 974         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 975
 976
 977         // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
 978
 979
 980         priv->card = card;
 981         priv->infra_open = 0;
 982
 983
 984         priv->rtap_net_dev = NULL;
 985         strcpy(dev->name, "wlan%d");
 986
 987         lbs_deb_thread("Starting main thread...\n");
 988         init_waitqueue_head(&priv->waitq);
 989         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 990         if (IS_ERR(priv->main_thread)) {
 991                 lbs_deb_thread("Error creating main thread.\n");
 992                 goto err_ndev;
 993         }
 994
 995         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 996         INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
 997         INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
 998         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 999         INIT_WORK(&priv->sync_channel, lbs_sync_channel_worker);
1000
1001         priv->mesh_open = 0;
1002         sprintf(priv->mesh_ssid, "mesh");
1003         priv->mesh_ssid_len = 4;
1004
1005         priv->wol_criteria = 0xffffffff;
1006         priv->wol_gpio = 0xff;
1007
1008         goto done;
1009
1010  err_ndev:
1011         free_netdev(dev);
1012
1013  err_adapter:
1014         lbs_free_adapter(priv);
1015
1016  err_wdev:
1017         lbs_cfg_free(priv);
1018
1019         priv = NULL;
1020
1021 done:
1022         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1023         return priv;
1024 }
1025 EXPORT_SYMBOL_GPL(lbs_add_card);
1026
1027
1028 void lbs_remove_card(struct lbs_private *priv)
1029 {
1030         struct net_device *dev = priv->dev;
1031
1032         lbs_deb_enter(LBS_DEB_MAIN);
1033
1034         lbs_remove_mesh(priv);
1035         lbs_remove_rtap(priv);
1036
1037         dev = priv->dev;
1038
1039         cancel_delayed_work_sync(&priv->scan_work);
1040         cancel_delayed_work_sync(&priv->assoc_work);
1041         cancel_work_sync(&priv->mcast_work);
1042
1043         /* worker thread destruction blocks on the in-flight command which
1044          * should have been cleared already in lbs_stop_card().
1045          */
1046         lbs_deb_main("destroying worker thread\n");
1047         destroy_workqueue(priv->work_thread);
1048         lbs_deb_main("done destroying worker thread\n");
1049
1050         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1051                 priv->psmode = LBS802_11POWERMODECAM;
1052                 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1053         }
1054
1055         lbs_send_disconnect_notification(priv);
1056
1057         if (priv->is_deep_sleep) {
1058                 priv->is_deep_sleep = 0;
1059                 wake_up_interruptible(&priv->ds_awake_q);
1060         }
1061
1062         /* Stop the thread servicing the interrupts */
1063         priv->surpriseremoved = 1;
1064         kthread_stop(priv->main_thread);
1065
1066         lbs_free_adapter(priv);
1067         lbs_cfg_free(priv);
1068
1069         priv->dev = NULL;
1070         free_netdev(dev);
1071
1072         lbs_deb_leave(LBS_DEB_MAIN);
1073 }
1074 EXPORT_SYMBOL_GPL(lbs_remove_card);
1075
1076
1077 int lbs_start_card(struct lbs_private *priv)
1078 {
1079         struct net_device *dev = priv->dev;
1080         int ret = -1;
1081
1082         lbs_deb_enter(LBS_DEB_MAIN);
1083
1084         /* poke the firmware */
1085         ret = lbs_setup_firmware(priv);
1086         if (ret)
1087                 goto done;
1088
1089         if (lbs_cfg_register(priv)) {
1090                 lbs_pr_err("cannot register device\n");
1091                 goto done;
1092         }
1093
1094         lbs_update_channel(priv);
1095
1096         /*
1097          * While rtap isn't related to mesh, only mesh-enabled
1098          * firmware implements the rtap functionality via
1099          * CMD_802_11_MONITOR_MODE.
1100          */
1101         if (lbs_init_mesh(priv)) {
1102                 if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
1103                         lbs_pr_err("cannot register lbs_rtap attribute\n");
1104         }
1105
1106         lbs_debugfs_init_one(priv, dev);
1107
1108         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
1109
1110         ret = 0;
1111
1112 done:
1113         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1114         return ret;
1115 }
1116 EXPORT_SYMBOL_GPL(lbs_start_card);
1117
1118
1119 void lbs_stop_card(struct lbs_private *priv)
1120 {
1121         struct net_device *dev;
1122         struct cmd_ctrl_node *cmdnode;
1123         unsigned long flags;
1124
1125         lbs_deb_enter(LBS_DEB_MAIN);
1126
1127         if (!priv)
1128                 goto out;
1129         dev = priv->dev;
1130
1131         netif_stop_queue(dev);
1132         netif_carrier_off(dev);
1133
1134         lbs_debugfs_remove_one(priv);
1135         if (lbs_deinit_mesh(priv))
1136                 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1137
1138         /* Delete the timeout of the currently processing command */
1139         del_timer_sync(&priv->command_timer);
1140         del_timer_sync(&priv->auto_deepsleep_timer);
1141
1142         /* Flush pending command nodes */
1143         spin_lock_irqsave(&priv->driver_lock, flags);
1144         lbs_deb_main("clearing pending commands\n");
1145         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1146                 cmdnode->result = -ENOENT;
1147                 cmdnode->cmdwaitqwoken = 1;
1148                 wake_up_interruptible(&cmdnode->cmdwait_q);
1149         }
1150
1151         /* Flush the command the card is currently processing */
1152         if (priv->cur_cmd) {
1153                 lbs_deb_main("clearing current command\n");
1154                 priv->cur_cmd->result = -ENOENT;
1155                 priv->cur_cmd->cmdwaitqwoken = 1;
1156                 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1157         }
1158         lbs_deb_main("done clearing commands\n");
1159         spin_unlock_irqrestore(&priv->driver_lock, flags);
1160
1161         unregister_netdev(dev);
1162
1163 out:
1164         lbs_deb_leave(LBS_DEB_MAIN);
1165 }
1166 EXPORT_SYMBOL_GPL(lbs_stop_card);
1167
1168
1169 void lbs_queue_event(struct lbs_private *priv, u32 event)
1170 {
1171         unsigned long flags;
1172
1173         lbs_deb_enter(LBS_DEB_THREAD);
1174         spin_lock_irqsave(&priv->driver_lock, flags);
1175
1176         if (priv->psstate == PS_STATE_SLEEP)
1177                 priv->psstate = PS_STATE_AWAKE;
1178
1179         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1180
1181         wake_up_interruptible(&priv->waitq);
1182
1183         spin_unlock_irqrestore(&priv->driver_lock, flags);
1184         lbs_deb_leave(LBS_DEB_THREAD);
1185 }
1186 EXPORT_SYMBOL_GPL(lbs_queue_event);
1187
1188 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1189 {
1190         lbs_deb_enter(LBS_DEB_THREAD);
1191
1192         if (priv->psstate == PS_STATE_SLEEP)
1193                 priv->psstate = PS_STATE_AWAKE;
1194
1195         /* Swap buffers by flipping the response index */
1196         BUG_ON(resp_idx > 1);
1197         priv->resp_idx = resp_idx;
1198
1199         wake_up_interruptible(&priv->waitq);
1200
1201         lbs_deb_leave(LBS_DEB_THREAD);
1202 }
1203 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1204
1205 static int __init lbs_init_module(void)
1206 {
1207         lbs_deb_enter(LBS_DEB_MAIN);
1208         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1209         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1210         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1211         confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1212         lbs_debugfs_init();
1213         lbs_deb_leave(LBS_DEB_MAIN);
1214         return 0;
1215 }
1216
1217 static void __exit lbs_exit_module(void)
1218 {
1219         lbs_deb_enter(LBS_DEB_MAIN);
1220         lbs_debugfs_remove();
1221         lbs_deb_leave(LBS_DEB_MAIN);
1222 }
1223
1224 /*
1225  * rtap interface support fuctions
1226  */
1227
1228 static int lbs_rtap_open(struct net_device *dev)
1229 {
1230         /* Yes, _stop_ the queue. Because we don't support injection */
1231         lbs_deb_enter(LBS_DEB_MAIN);
1232         netif_carrier_off(dev);
1233         netif_stop_queue(dev);
1234         lbs_deb_leave(LBS_DEB_LEAVE);
1235         return 0;
1236 }
1237
1238 static int lbs_rtap_stop(struct net_device *dev)
1239 {
1240         lbs_deb_enter(LBS_DEB_MAIN);
1241         lbs_deb_leave(LBS_DEB_MAIN);
1242         return 0;
1243 }
1244
1245 static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
1246                                             struct net_device *dev)
1247 {
1248         netif_stop_queue(dev);
1249         return NETDEV_TX_BUSY;
1250 }
1251
1252 static void lbs_remove_rtap(struct lbs_private *priv)
1253 {
1254         lbs_deb_enter(LBS_DEB_MAIN);
1255         if (priv->rtap_net_dev == NULL)
1256                 goto out;
1257         unregister_netdev(priv->rtap_net_dev);
1258         free_netdev(priv->rtap_net_dev);
1259         priv->rtap_net_dev = NULL;
1260 out:
1261         lbs_deb_leave(LBS_DEB_MAIN);
1262 }
1263
1264 static const struct net_device_ops rtap_netdev_ops = {
1265         .ndo_open = lbs_rtap_open,
1266         .ndo_stop = lbs_rtap_stop,
1267         .ndo_start_xmit = lbs_rtap_hard_start_xmit,
1268 };
1269
1270 static int lbs_add_rtap(struct lbs_private *priv)
1271 {
1272         int ret = 0;
1273         struct net_device *rtap_dev;
1274
1275         lbs_deb_enter(LBS_DEB_MAIN);
1276         if (priv->rtap_net_dev) {
1277                 ret = -EPERM;
1278                 goto out;
1279         }
1280
1281         rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
1282         if (rtap_dev == NULL) {
1283                 ret = -ENOMEM;
1284                 goto out;
1285         }
1286
1287         memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
1288         rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
1289         rtap_dev->netdev_ops = &rtap_netdev_ops;
1290         rtap_dev->ml_priv = priv;
1291         SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
1292
1293         ret = register_netdev(rtap_dev);
1294         if (ret) {
1295                 free_netdev(rtap_dev);
1296                 goto out;
1297         }
1298         priv->rtap_net_dev = rtap_dev;
1299
1300 out:
1301         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1302         return ret;
1303 }
1304
1305 module_init(lbs_init_module);
1306 module_exit(lbs_exit_module);
1307
1308 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1309 MODULE_AUTHOR("Marvell International Ltd.");
1310 MODULE_LICENSE("GPL");