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                         if (kfifo_out(&priv->event_fifo,
 518                                 (unsigned char *) &event, sizeof(event)) !=
 519                                 sizeof(event))
 520                                         break;
 521                         spin_unlock_irq(&priv->driver_lock);
 522                         lbs_process_event(priv, event);
 523                         spin_lock_irq(&priv->driver_lock);
 524                 }
 525                 spin_unlock_irq(&priv->driver_lock);
 526
 527                 if (priv->wakeup_dev_required) {
 528                         lbs_deb_thread("Waking up device...\n");
 529                         /* Wake up device */
 530                         if (priv->exit_deep_sleep(priv))
 531                                 lbs_deb_thread("Wakeup device failed\n");
 532                         continue;
 533                 }
 534
 535                 /* command timeout stuff */
 536                 if (priv->cmd_timed_out && priv->cur_cmd) {
 537                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 538
 539                         if (++priv->nr_retries > 3) {
 540                                 lbs_pr_info("Excessive timeouts submitting "
 541                                         "command 0x%04x\n",
 542                                         le16_to_cpu(cmdnode->cmdbuf->command));
 543                                 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 544                                 priv->nr_retries = 0;
 545                                 if (priv->reset_card)
 546                                         priv->reset_card(priv);
 547                         } else {
 548                                 priv->cur_cmd = NULL;
 549                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 550                                 lbs_pr_info("requeueing command 0x%04x due "
 551                                         "to timeout (#%d)\n",
 552                                         le16_to_cpu(cmdnode->cmdbuf->command),
 553                                         priv->nr_retries);
 554
 555                                 /* Stick it back at the _top_ of the pending queue
 556                                    for immediate resubmission */
 557                                 list_add(&cmdnode->list, &priv->cmdpendingq);
 558                         }
 559                 }
 560                 priv->cmd_timed_out = 0;
 561
 562
 563
 564                 if (!priv->fw_ready)
 565                         continue;
 566
 567                 /* Check if we need to confirm Sleep Request received previously */
 568                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 569                     !priv->dnld_sent && !priv->cur_cmd) {
 570                         if (priv->connect_status == LBS_CONNECTED) {
 571                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 572                                         "dnld_sent %d, cur_cmd %p\n",
 573                                         priv->currenttxskb, priv->dnld_sent,
 574                                         priv->cur_cmd);
 575
 576                                 lbs_ps_confirm_sleep(priv);
 577                         } else {
 578                                 /* workaround for firmware sending
 579                                  * deauth/linkloss event immediately
 580                                  * after sleep request; remove this
 581                                  * after firmware fixes it
 582                                  */
 583                                 priv->psstate = PS_STATE_AWAKE;
 584                                 lbs_pr_alert("ignore PS_SleepConfirm in "
 585                                         "non-connected state\n");
 586                         }
 587                 }
 588
 589                 /* The PS state is changed during processing of Sleep Request
 590                  * event above
 591                  */
 592                 if ((priv->psstate == PS_STATE_SLEEP) ||
 593                     (priv->psstate == PS_STATE_PRE_SLEEP))
 594                         continue;
 595
 596                 if (priv->is_deep_sleep)
 597                         continue;
 598
 599                 /* Execute the next command */
 600                 if (!priv->dnld_sent && !priv->cur_cmd)
 601                         lbs_execute_next_command(priv);
 602
 603                 /* Wake-up command waiters which can't sleep in
 604                  * lbs_prepare_and_send_command
 605                  */
 606                 if (!list_empty(&priv->cmdpendingq))
 607                         wake_up_all(&priv->cmd_pending);
 608
 609                 spin_lock_irq(&priv->driver_lock);
 610                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 611                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 612                                                         priv->tx_pending_buf,
 613                                                         priv->tx_pending_len);
 614                         if (ret) {
 615                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 616                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 617                         }
 618                         priv->tx_pending_len = 0;
 619                         if (!priv->currenttxskb) {
 620                                 /* We can wake the queues immediately if we aren't
 621                                    waiting for TX feedback */
 622                                 if (priv->connect_status == LBS_CONNECTED)
 623                                         netif_wake_queue(priv->dev);
 624                                 if (priv->mesh_dev &&
 625                                     priv->mesh_connect_status == LBS_CONNECTED)
 626                                         netif_wake_queue(priv->mesh_dev);
 627                         }
 628                 }
 629                 spin_unlock_irq(&priv->driver_lock);
 630         }
 631
 632         del_timer(&priv->command_timer);
 633         del_timer(&priv->auto_deepsleep_timer);
 634         wake_up_all(&priv->cmd_pending);
 635
 636         lbs_deb_leave(LBS_DEB_THREAD);
 637         return 0;
 638 }
 639
 640 static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
 641                                 struct cmd_header *cmd)
 642 {
 643         lbs_deb_enter(LBS_DEB_FW);
 644
 645         netif_device_detach(priv->dev);
 646         if (priv->mesh_dev)
 647                 netif_device_detach(priv->mesh_dev);
 648
 649         priv->fw_ready = 0;
 650         lbs_deb_leave(LBS_DEB_FW);
 651         return 0;
 652 }
 653
 654 int lbs_suspend(struct lbs_private *priv)
 655 {
 656         struct cmd_header cmd;
 657         int ret;
 658
 659         lbs_deb_enter(LBS_DEB_FW);
 660
 661         if (priv->wol_criteria == 0xffffffff) {
 662                 lbs_pr_info("Suspend attempt without configuring wake params!\n");
 663                 return -EINVAL;
 664         }
 665
 666         memset(&cmd, 0, sizeof(cmd));
 667
 668         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
 669                         sizeof(cmd), lbs_suspend_callback, 0);
 670         if (ret)
 671                 lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
 672
 673         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 674         return ret;
 675 }
 676 EXPORT_SYMBOL_GPL(lbs_suspend);
 677
 678 void lbs_resume(struct lbs_private *priv)
 679 {
 680         lbs_deb_enter(LBS_DEB_FW);
 681
 682         priv->fw_ready = 1;
 683
 684         /* Firmware doesn't seem to give us RX packets any more
 685            until we send it some command. Might as well update */
 686         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
 687                                      0, 0, NULL);
 688
 689         netif_device_attach(priv->dev);
 690         if (priv->mesh_dev)
 691                 netif_device_attach(priv->mesh_dev);
 692
 693         lbs_deb_leave(LBS_DEB_FW);
 694 }
 695 EXPORT_SYMBOL_GPL(lbs_resume);
 696
 697 /**
 698  * @brief This function gets the HW spec from the firmware and sets
 699  *        some basic parameters.
 700  *
 701  *  @param priv    A pointer to struct lbs_private structure
 702  *  @return        0 or -1
 703  */
 704 static int lbs_setup_firmware(struct lbs_private *priv)
 705 {
 706         int ret = -1;
 707         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 708
 709         lbs_deb_enter(LBS_DEB_FW);
 710
 711         /* Read MAC address from firmware */
 712         memset(priv->current_addr, 0xff, ETH_ALEN);
 713         ret = lbs_update_hw_spec(priv);
 714         if (ret)
 715                 goto done;
 716
 717         /* Read power levels if available */
 718         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 719         if (ret == 0) {
 720                 priv->txpower_cur = curlevel;
 721                 priv->txpower_min = minlevel;
 722                 priv->txpower_max = maxlevel;
 723         }
 724
 725         lbs_set_mac_control(priv);
 726 done:
 727         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 728         return ret;
 729 }
 730
 731 /**
 732  *  This function handles the timeout of command sending.
 733  *  It will re-send the same command again.
 734  */
 735 static void command_timer_fn(unsigned long data)
 736 {
 737         struct lbs_private *priv = (struct lbs_private *)data;
 738         unsigned long flags;
 739
 740         lbs_deb_enter(LBS_DEB_CMD);
 741         spin_lock_irqsave(&priv->driver_lock, flags);
 742
 743         if (!priv->cur_cmd)
 744                 goto out;
 745
 746         lbs_pr_info("command 0x%04x timed out\n",
 747                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 748
 749         priv->cmd_timed_out = 1;
 750         wake_up_interruptible(&priv->waitq);
 751 out:
 752         spin_unlock_irqrestore(&priv->driver_lock, flags);
 753         lbs_deb_leave(LBS_DEB_CMD);
 754 }
 755
 756 /**
 757  *  This function put the device back to deep sleep mode when timer expires
 758  *  and no activity (command, event, data etc.) is detected.
 759  */
 760 static void auto_deepsleep_timer_fn(unsigned long data)
 761 {
 762         struct lbs_private *priv = (struct lbs_private *)data;
 763         int ret;
 764
 765         lbs_deb_enter(LBS_DEB_CMD);
 766
 767         if (priv->is_activity_detected) {
 768                 priv->is_activity_detected = 0;
 769         } else {
 770                 if (priv->is_auto_deep_sleep_enabled &&
 771                                 (!priv->wakeup_dev_required) &&
 772                                 (priv->connect_status != LBS_CONNECTED)) {
 773                         lbs_deb_main("Entering auto deep sleep mode...\n");
 774                         ret = lbs_prepare_and_send_command(priv,
 775                                         CMD_802_11_DEEP_SLEEP, 0,
 776                                         0, 0, NULL);
 777                         if (ret)
 778                                 lbs_pr_err("Enter Deep Sleep command failed\n");
 779                 }
 780         }
 781         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 782                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 783         lbs_deb_leave(LBS_DEB_CMD);
 784 }
 785
 786 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 787 {
 788         lbs_deb_enter(LBS_DEB_SDIO);
 789
 790         priv->is_auto_deep_sleep_enabled = 1;
 791         if (priv->is_deep_sleep)
 792                 priv->wakeup_dev_required = 1;
 793         mod_timer(&priv->auto_deepsleep_timer ,
 794                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 795
 796         lbs_deb_leave(LBS_DEB_SDIO);
 797         return 0;
 798 }
 799
 800 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 801 {
 802         lbs_deb_enter(LBS_DEB_SDIO);
 803
 804         priv->is_auto_deep_sleep_enabled = 0;
 805         priv->auto_deep_sleep_timeout = 0;
 806         del_timer(&priv->auto_deepsleep_timer);
 807
 808         lbs_deb_leave(LBS_DEB_SDIO);
 809         return 0;
 810 }
 811
 812 static void lbs_sync_channel_worker(struct work_struct *work)
 813 {
 814         struct lbs_private *priv = container_of(work, struct lbs_private,
 815                 sync_channel);
 816
 817         lbs_deb_enter(LBS_DEB_MAIN);
 818         if (lbs_update_channel(priv))
 819                 lbs_pr_info("Channel synchronization failed.");
 820         lbs_deb_leave(LBS_DEB_MAIN);
 821 }
 822
 823
 824 static int lbs_init_adapter(struct lbs_private *priv)
 825 {
 826         size_t bufsize;
 827         int i, ret = 0;
 828
 829         lbs_deb_enter(LBS_DEB_MAIN);
 830
 831         /* Allocate buffer to store the BSSID list */
 832         bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
 833         priv->networks = kzalloc(bufsize, GFP_KERNEL);
 834         if (!priv->networks) {
 835                 lbs_pr_err("Out of memory allocating beacons\n");
 836                 ret = -1;
 837                 goto out;
 838         }
 839
 840         /* Initialize scan result lists */
 841         INIT_LIST_HEAD(&priv->network_free_list);
 842         INIT_LIST_HEAD(&priv->network_list);
 843         for (i = 0; i < MAX_NETWORK_COUNT; i++) {
 844                 list_add_tail(&priv->networks[i].list,
 845                               &priv->network_free_list);
 846         }
 847
 848         memset(priv->current_addr, 0xff, ETH_ALEN);
 849
 850         priv->connect_status = LBS_DISCONNECTED;
 851         priv->mesh_connect_status = LBS_DISCONNECTED;
 852         priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
 853         priv->mode = IW_MODE_INFRA;
 854         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 855         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 856         priv->radio_on = 1;
 857         priv->enablehwauto = 1;
 858         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 859         priv->psmode = LBS802_11POWERMODECAM;
 860         priv->psstate = PS_STATE_FULL_POWER;
 861         priv->is_deep_sleep = 0;
 862         priv->is_auto_deep_sleep_enabled = 0;
 863         priv->wakeup_dev_required = 0;
 864         init_waitqueue_head(&priv->ds_awake_q);
 865
 866         mutex_init(&priv->lock);
 867
 868         setup_timer(&priv->command_timer, command_timer_fn,
 869                 (unsigned long)priv);
 870         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 871                         (unsigned long)priv);
 872
 873         INIT_LIST_HEAD(&priv->cmdfreeq);
 874         INIT_LIST_HEAD(&priv->cmdpendingq);
 875
 876         spin_lock_init(&priv->driver_lock);
 877         init_waitqueue_head(&priv->cmd_pending);
 878
 879         /* Allocate the command buffers */
 880         if (lbs_allocate_cmd_buffer(priv)) {
 881                 lbs_pr_err("Out of memory allocating command buffers\n");
 882                 ret = -ENOMEM;
 883                 goto out;
 884         }
 885         priv->resp_idx = 0;
 886         priv->resp_len[0] = priv->resp_len[1] = 0;
 887
 888         /* Create the event FIFO */
 889         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 890         if (ret) {
 891                 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
 892                 goto out;
 893         }
 894
 895 out:
 896         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 897
 898         return ret;
 899 }
 900
 901 static void lbs_free_adapter(struct lbs_private *priv)
 902 {
 903         lbs_deb_enter(LBS_DEB_MAIN);
 904
 905         lbs_free_cmd_buffer(priv);
 906         kfifo_free(&priv->event_fifo);
 907         del_timer(&priv->command_timer);
 908         del_timer(&priv->auto_deepsleep_timer);
 909         kfree(priv->networks);
 910         priv->networks = NULL;
 911
 912         lbs_deb_leave(LBS_DEB_MAIN);
 913 }
 914
 915 static const struct net_device_ops lbs_netdev_ops = {
 916         .ndo_open               = lbs_dev_open,
 917         .ndo_stop               = lbs_eth_stop,
 918         .ndo_start_xmit         = lbs_hard_start_xmit,
 919         .ndo_set_mac_address    = lbs_set_mac_address,
 920         .ndo_tx_timeout         = lbs_tx_timeout,
 921         .ndo_set_multicast_list = lbs_set_multicast_list,
 922         .ndo_change_mtu         = eth_change_mtu,
 923         .ndo_validate_addr      = eth_validate_addr,
 924 };
 925
 926 /**
 927  * @brief This function adds the card. it will probe the
 928  * card, allocate the lbs_priv and initialize the device.
 929  *
 930  *  @param card    A pointer to card
 931  *  @return        A pointer to struct lbs_private structure
 932  */
 933 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 934 {
 935         struct net_device *dev;
 936         struct wireless_dev *wdev;
 937         struct lbs_private *priv = NULL;
 938
 939         lbs_deb_enter(LBS_DEB_MAIN);
 940
 941         /* Allocate an Ethernet device and register it */
 942         wdev = lbs_cfg_alloc(dmdev);
 943         if (IS_ERR(wdev)) {
 944                 lbs_pr_err("cfg80211 init failed\n");
 945                 goto done;
 946         }
 947         /* TODO? */
 948         wdev->iftype = NL80211_IFTYPE_STATION;
 949         priv = wdev_priv(wdev);
 950         priv->wdev = wdev;
 951
 952         if (lbs_init_adapter(priv)) {
 953                 lbs_pr_err("failed to initialize adapter structure.\n");
 954                 goto err_wdev;
 955         }
 956
 957         //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
 958         dev = alloc_netdev(0, "wlan%d", ether_setup);
 959         if (!dev) {
 960                 dev_err(dmdev, "no memory for network device instance\n");
 961                 goto err_adapter;
 962         }
 963
 964         dev->ieee80211_ptr = wdev;
 965         dev->ml_priv = priv;
 966         SET_NETDEV_DEV(dev, dmdev);
 967         wdev->netdev = dev;
 968         priv->dev = dev;
 969
 970         dev->netdev_ops = &lbs_netdev_ops;
 971         dev->watchdog_timeo = 5 * HZ;
 972         dev->ethtool_ops = &lbs_ethtool_ops;
 973 #ifdef  WIRELESS_EXT
 974         dev->wireless_handlers = &lbs_handler_def;
 975 #endif
 976         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 977
 978
 979         // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
 980
 981
 982         priv->card = card;
 983         priv->infra_open = 0;
 984
 985
 986         priv->rtap_net_dev = NULL;
 987         strcpy(dev->name, "wlan%d");
 988
 989         lbs_deb_thread("Starting main thread...\n");
 990         init_waitqueue_head(&priv->waitq);
 991         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 992         if (IS_ERR(priv->main_thread)) {
 993                 lbs_deb_thread("Error creating main thread.\n");
 994                 goto err_ndev;
 995         }
 996
 997         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 998         INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
 999         INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
1000         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1001         INIT_WORK(&priv->sync_channel, lbs_sync_channel_worker);
1002
1003         priv->mesh_open = 0;
1004         sprintf(priv->mesh_ssid, "mesh");
1005         priv->mesh_ssid_len = 4;
1006
1007         priv->wol_criteria = 0xffffffff;
1008         priv->wol_gpio = 0xff;
1009
1010         goto done;
1011
1012  err_ndev:
1013         free_netdev(dev);
1014
1015  err_adapter:
1016         lbs_free_adapter(priv);
1017
1018  err_wdev:
1019         lbs_cfg_free(priv);
1020
1021         priv = NULL;
1022
1023 done:
1024         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1025         return priv;
1026 }
1027 EXPORT_SYMBOL_GPL(lbs_add_card);
1028
1029
1030 void lbs_remove_card(struct lbs_private *priv)
1031 {
1032         struct net_device *dev = priv->dev;
1033
1034         lbs_deb_enter(LBS_DEB_MAIN);
1035
1036         lbs_remove_mesh(priv);
1037         lbs_remove_rtap(priv);
1038
1039         dev = priv->dev;
1040
1041         cancel_delayed_work_sync(&priv->scan_work);
1042         cancel_delayed_work_sync(&priv->assoc_work);
1043         cancel_work_sync(&priv->mcast_work);
1044
1045         /* worker thread destruction blocks on the in-flight command which
1046          * should have been cleared already in lbs_stop_card().
1047          */
1048         lbs_deb_main("destroying worker thread\n");
1049         destroy_workqueue(priv->work_thread);
1050         lbs_deb_main("done destroying worker thread\n");
1051
1052         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1053                 priv->psmode = LBS802_11POWERMODECAM;
1054                 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1055         }
1056
1057         lbs_send_disconnect_notification(priv);
1058
1059         if (priv->is_deep_sleep) {
1060                 priv->is_deep_sleep = 0;
1061                 wake_up_interruptible(&priv->ds_awake_q);
1062         }
1063
1064         /* Stop the thread servicing the interrupts */
1065         priv->surpriseremoved = 1;
1066         kthread_stop(priv->main_thread);
1067
1068         lbs_free_adapter(priv);
1069         lbs_cfg_free(priv);
1070
1071         priv->dev = NULL;
1072         free_netdev(dev);
1073
1074         lbs_deb_leave(LBS_DEB_MAIN);
1075 }
1076 EXPORT_SYMBOL_GPL(lbs_remove_card);
1077
1078
1079 int lbs_start_card(struct lbs_private *priv)
1080 {
1081         struct net_device *dev = priv->dev;
1082         int ret = -1;
1083
1084         lbs_deb_enter(LBS_DEB_MAIN);
1085
1086         /* poke the firmware */
1087         ret = lbs_setup_firmware(priv);
1088         if (ret)
1089                 goto done;
1090
1091         if (lbs_cfg_register(priv)) {
1092                 lbs_pr_err("cannot register device\n");
1093                 goto done;
1094         }
1095
1096         lbs_update_channel(priv);
1097
1098         /*
1099          * While rtap isn't related to mesh, only mesh-enabled
1100          * firmware implements the rtap functionality via
1101          * CMD_802_11_MONITOR_MODE.
1102          */
1103         if (lbs_init_mesh(priv)) {
1104                 if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
1105                         lbs_pr_err("cannot register lbs_rtap attribute\n");
1106         }
1107
1108         lbs_debugfs_init_one(priv, dev);
1109
1110         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
1111
1112         ret = 0;
1113
1114 done:
1115         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1116         return ret;
1117 }
1118 EXPORT_SYMBOL_GPL(lbs_start_card);
1119
1120
1121 void lbs_stop_card(struct lbs_private *priv)
1122 {
1123         struct net_device *dev;
1124         struct cmd_ctrl_node *cmdnode;
1125         unsigned long flags;
1126
1127         lbs_deb_enter(LBS_DEB_MAIN);
1128
1129         if (!priv)
1130                 goto out;
1131         dev = priv->dev;
1132
1133         netif_stop_queue(dev);
1134         netif_carrier_off(dev);
1135
1136         lbs_debugfs_remove_one(priv);
1137         if (lbs_deinit_mesh(priv))
1138                 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1139
1140         /* Delete the timeout of the currently processing command */
1141         del_timer_sync(&priv->command_timer);
1142         del_timer_sync(&priv->auto_deepsleep_timer);
1143
1144         /* Flush pending command nodes */
1145         spin_lock_irqsave(&priv->driver_lock, flags);
1146         lbs_deb_main("clearing pending commands\n");
1147         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1148                 cmdnode->result = -ENOENT;
1149                 cmdnode->cmdwaitqwoken = 1;
1150                 wake_up_interruptible(&cmdnode->cmdwait_q);
1151         }
1152
1153         /* Flush the command the card is currently processing */
1154         if (priv->cur_cmd) {
1155                 lbs_deb_main("clearing current command\n");
1156                 priv->cur_cmd->result = -ENOENT;
1157                 priv->cur_cmd->cmdwaitqwoken = 1;
1158                 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1159         }
1160         lbs_deb_main("done clearing commands\n");
1161         spin_unlock_irqrestore(&priv->driver_lock, flags);
1162
1163         unregister_netdev(dev);
1164
1165 out:
1166         lbs_deb_leave(LBS_DEB_MAIN);
1167 }
1168 EXPORT_SYMBOL_GPL(lbs_stop_card);
1169
1170
1171 void lbs_queue_event(struct lbs_private *priv, u32 event)
1172 {
1173         unsigned long flags;
1174
1175         lbs_deb_enter(LBS_DEB_THREAD);
1176         spin_lock_irqsave(&priv->driver_lock, flags);
1177
1178         if (priv->psstate == PS_STATE_SLEEP)
1179                 priv->psstate = PS_STATE_AWAKE;
1180
1181         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1182
1183         wake_up_interruptible(&priv->waitq);
1184
1185         spin_unlock_irqrestore(&priv->driver_lock, flags);
1186         lbs_deb_leave(LBS_DEB_THREAD);
1187 }
1188 EXPORT_SYMBOL_GPL(lbs_queue_event);
1189
1190 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1191 {
1192         lbs_deb_enter(LBS_DEB_THREAD);
1193
1194         if (priv->psstate == PS_STATE_SLEEP)
1195                 priv->psstate = PS_STATE_AWAKE;
1196
1197         /* Swap buffers by flipping the response index */
1198         BUG_ON(resp_idx > 1);
1199         priv->resp_idx = resp_idx;
1200
1201         wake_up_interruptible(&priv->waitq);
1202
1203         lbs_deb_leave(LBS_DEB_THREAD);
1204 }
1205 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1206
1207 static int __init lbs_init_module(void)
1208 {
1209         lbs_deb_enter(LBS_DEB_MAIN);
1210         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1211         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1212         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1213         confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1214         lbs_debugfs_init();
1215         lbs_deb_leave(LBS_DEB_MAIN);
1216         return 0;
1217 }
1218
1219 static void __exit lbs_exit_module(void)
1220 {
1221         lbs_deb_enter(LBS_DEB_MAIN);
1222         lbs_debugfs_remove();
1223         lbs_deb_leave(LBS_DEB_MAIN);
1224 }
1225
1226 /*
1227  * rtap interface support fuctions
1228  */
1229
1230 static int lbs_rtap_open(struct net_device *dev)
1231 {
1232         /* Yes, _stop_ the queue. Because we don't support injection */
1233         lbs_deb_enter(LBS_DEB_MAIN);
1234         netif_carrier_off(dev);
1235         netif_stop_queue(dev);
1236         lbs_deb_leave(LBS_DEB_LEAVE);
1237         return 0;
1238 }
1239
1240 static int lbs_rtap_stop(struct net_device *dev)
1241 {
1242         lbs_deb_enter(LBS_DEB_MAIN);
1243         lbs_deb_leave(LBS_DEB_MAIN);
1244         return 0;
1245 }
1246
1247 static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
1248                                             struct net_device *dev)
1249 {
1250         netif_stop_queue(dev);
1251         return NETDEV_TX_BUSY;
1252 }
1253
1254 static void lbs_remove_rtap(struct lbs_private *priv)
1255 {
1256         lbs_deb_enter(LBS_DEB_MAIN);
1257         if (priv->rtap_net_dev == NULL)
1258                 goto out;
1259         unregister_netdev(priv->rtap_net_dev);
1260         free_netdev(priv->rtap_net_dev);
1261         priv->rtap_net_dev = NULL;
1262 out:
1263         lbs_deb_leave(LBS_DEB_MAIN);
1264 }
1265
1266 static const struct net_device_ops rtap_netdev_ops = {
1267         .ndo_open = lbs_rtap_open,
1268         .ndo_stop = lbs_rtap_stop,
1269         .ndo_start_xmit = lbs_rtap_hard_start_xmit,
1270 };
1271
1272 static int lbs_add_rtap(struct lbs_private *priv)
1273 {
1274         int ret = 0;
1275         struct net_device *rtap_dev;
1276
1277         lbs_deb_enter(LBS_DEB_MAIN);
1278         if (priv->rtap_net_dev) {
1279                 ret = -EPERM;
1280                 goto out;
1281         }
1282
1283         rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
1284         if (rtap_dev == NULL) {
1285                 ret = -ENOMEM;
1286                 goto out;
1287         }
1288
1289         memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
1290         rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
1291         rtap_dev->netdev_ops = &rtap_netdev_ops;
1292         rtap_dev->ml_priv = priv;
1293         SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
1294
1295         ret = register_netdev(rtap_dev);
1296         if (ret) {
1297                 free_netdev(rtap_dev);
1298                 goto out;
1299         }
1300         priv->rtap_net_dev = rtap_dev;
1301
1302 out:
1303         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1304         return ret;
1305 }
1306
1307 module_init(lbs_init_module);
1308 module_exit(lbs_exit_module);
1309
1310 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1311 MODULE_AUTHOR("Marvell International Ltd.");
1312 MODULE_LICENSE("GPL");