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