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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   8
   9 #include <linux/module.h>
  10 #include <linux/delay.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/hardirq.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/if_arp.h>
  15 #include <linux/kthread.h>
  16 #include <linux/kfifo.h>
  17 #include <linux/slab.h>
  18 #include <net/cfg80211.h>
  19
  20 #include "host.h"
  21 #include "decl.h"
  22 #include "dev.h"
  23 #include "cfg.h"
  24 #include "debugfs.h"
  25 #include "cmd.h"
  26 #include "mesh.h"
  27
  28 #define DRIVER_RELEASE_VERSION "323.p0"
  29 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  30 #ifdef  DEBUG
  31     "-dbg"
  32 #endif
  33     "";
  34
  35
  36 /* Module parameters */
  37 unsigned int lbs_debug;
  38 EXPORT_SYMBOL_GPL(lbs_debug);
  39 module_param_named(libertas_debug, lbs_debug, int, 0644);
  40
  41 unsigned int lbs_disablemesh;
  42 EXPORT_SYMBOL_GPL(lbs_disablemesh);
  43 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
  44
  45
  46 /*
  47  * This global structure is used to send the confirm_sleep command as
  48  * fast as possible down to the firmware.
  49  */
  50 struct cmd_confirm_sleep confirm_sleep;
  51
  52
  53 /*
  54  * the table to keep region code
  55  */
  56 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
  57     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
  58
  59 /*
  60  * FW rate table.  FW refers to rates by their index in this table, not by the
  61  * rate value itself.  Values of 0x00 are
  62  * reserved positions.
  63  */
  64 static u8 fw_data_rates[MAX_RATES] =
  65     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
  66       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
  67 };
  68
  69 /**
  70  *  lbs_fw_index_to_data_rate - use index to get the data rate
  71  *
  72  *  @idx:       The index of data rate
  73  *  returns:    data rate or 0
  74  */
  75 u32 lbs_fw_index_to_data_rate(u8 idx)
  76 {
  77         if (idx >= sizeof(fw_data_rates))
  78                 idx = 0;
  79         return fw_data_rates[idx];
  80 }
  81
  82 /**
  83  *  lbs_data_rate_to_fw_index - use rate to get the index
  84  *
  85  *  @rate:      data rate
  86  *  returns:    index or 0
  87  */
  88 u8 lbs_data_rate_to_fw_index(u32 rate)
  89 {
  90         u8 i;
  91
  92         if (!rate)
  93                 return 0;
  94
  95         for (i = 0; i < sizeof(fw_data_rates); i++) {
  96                 if (rate == fw_data_rates[i])
  97                         return i;
  98         }
  99         return 0;
 100 }
 101
 102 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
 103 {
 104         int ret = 0;
 105
 106         switch (type) {
 107         case NL80211_IFTYPE_MONITOR:
 108                 ret = lbs_set_monitor_mode(priv, 1);
 109                 break;
 110         case NL80211_IFTYPE_STATION:
 111                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 112                         ret = lbs_set_monitor_mode(priv, 0);
 113                 if (!ret)
 114                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
 115                 break;
 116         case NL80211_IFTYPE_ADHOC:
 117                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 118                         ret = lbs_set_monitor_mode(priv, 0);
 119                 if (!ret)
 120                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
 121                 break;
 122         default:
 123                 ret = -ENOTSUPP;
 124         }
 125         return ret;
 126 }
 127
 128 int lbs_start_iface(struct lbs_private *priv)
 129 {
 130         struct cmd_ds_802_11_mac_address cmd;
 131         int ret;
 132
 133         if (priv->power_restore) {
 134                 ret = priv->power_restore(priv);
 135                 if (ret)
 136                         return ret;
 137         }
 138
 139         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 140         cmd.action = cpu_to_le16(CMD_ACT_SET);
 141         memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
 142
 143         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 144         if (ret) {
 145                 lbs_deb_net("set MAC address failed\n");
 146                 goto err;
 147         }
 148
 149         ret = lbs_set_iface_type(priv, priv->wdev->iftype);
 150         if (ret) {
 151                 lbs_deb_net("set iface type failed\n");
 152                 goto err;
 153         }
 154
 155         ret = lbs_set_11d_domain_info(priv);
 156         if (ret) {
 157                 lbs_deb_net("set 11d domain info failed\n");
 158                 goto err;
 159         }
 160
 161         lbs_update_channel(priv);
 162
 163         priv->iface_running = true;
 164         return 0;
 165
 166 err:
 167         if (priv->power_save)
 168                 priv->power_save(priv);
 169         return ret;
 170 }
 171
 172 /**
 173  *  lbs_dev_open - open the ethX interface
 174  *
 175  *  @dev:       A pointer to &net_device structure
 176  *  returns:    0 or -EBUSY if monitor mode active
 177  */
 178 static int lbs_dev_open(struct net_device *dev)
 179 {
 180         struct lbs_private *priv = dev->ml_priv;
 181         int ret = 0;
 182
 183         lbs_deb_enter(LBS_DEB_NET);
 184         if (!priv->iface_running) {
 185                 ret = lbs_start_iface(priv);
 186                 if (ret)
 187                         goto out;
 188         }
 189
 190         spin_lock_irq(&priv->driver_lock);
 191
 192         netif_carrier_off(dev);
 193
 194         if (!priv->tx_pending_len)
 195                 netif_wake_queue(dev);
 196
 197         spin_unlock_irq(&priv->driver_lock);
 198
 199 out:
 200         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 201         return ret;
 202 }
 203
 204 static bool lbs_command_queue_empty(struct lbs_private *priv)
 205 {
 206         unsigned long flags;
 207         bool ret;
 208         spin_lock_irqsave(&priv->driver_lock, flags);
 209         ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
 210         spin_unlock_irqrestore(&priv->driver_lock, flags);
 211         return ret;
 212 }
 213
 214 int lbs_stop_iface(struct lbs_private *priv)
 215 {
 216         unsigned long flags;
 217         int ret = 0;
 218
 219         lbs_deb_enter(LBS_DEB_MAIN);
 220
 221         spin_lock_irqsave(&priv->driver_lock, flags);
 222         priv->iface_running = false;
 223         kfree_skb(priv->currenttxskb);
 224         priv->currenttxskb = NULL;
 225         priv->tx_pending_len = 0;
 226         spin_unlock_irqrestore(&priv->driver_lock, flags);
 227
 228         cancel_work_sync(&priv->mcast_work);
 229         del_timer_sync(&priv->tx_lockup_timer);
 230
 231         /* Disable command processing, and wait for all commands to complete */
 232         lbs_deb_main("waiting for commands to complete\n");
 233         wait_event(priv->waitq, lbs_command_queue_empty(priv));
 234         lbs_deb_main("all commands completed\n");
 235
 236         if (priv->power_save)
 237                 ret = priv->power_save(priv);
 238
 239         lbs_deb_leave(LBS_DEB_MAIN);
 240         return ret;
 241 }
 242
 243 /**
 244  *  lbs_eth_stop - close the ethX interface
 245  *
 246  *  @dev:       A pointer to &net_device structure
 247  *  returns:    0
 248  */
 249 static int lbs_eth_stop(struct net_device *dev)
 250 {
 251         struct lbs_private *priv = dev->ml_priv;
 252
 253         lbs_deb_enter(LBS_DEB_NET);
 254
 255         if (priv->connect_status == LBS_CONNECTED)
 256                 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
 257
 258         spin_lock_irq(&priv->driver_lock);
 259         netif_stop_queue(dev);
 260         spin_unlock_irq(&priv->driver_lock);
 261
 262         lbs_update_mcast(priv);
 263         cancel_delayed_work_sync(&priv->scan_work);
 264         if (priv->scan_req)
 265                 lbs_scan_done(priv);
 266
 267         netif_carrier_off(priv->dev);
 268
 269         if (!lbs_iface_active(priv))
 270                 lbs_stop_iface(priv);
 271
 272         lbs_deb_leave(LBS_DEB_NET);
 273         return 0;
 274 }
 275
 276 void lbs_host_to_card_done(struct lbs_private *priv)
 277 {
 278         unsigned long flags;
 279
 280         lbs_deb_enter(LBS_DEB_THREAD);
 281
 282         spin_lock_irqsave(&priv->driver_lock, flags);
 283         del_timer(&priv->tx_lockup_timer);
 284
 285         priv->dnld_sent = DNLD_RES_RECEIVED;
 286
 287         /* Wake main thread if commands are pending */
 288         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 289                 if (!priv->wakeup_dev_required)
 290                         wake_up(&priv->waitq);
 291         }
 292
 293         spin_unlock_irqrestore(&priv->driver_lock, flags);
 294         lbs_deb_leave(LBS_DEB_THREAD);
 295 }
 296 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 297
 298 int lbs_set_mac_address(struct net_device *dev, void *addr)
 299 {
 300         int ret = 0;
 301         struct lbs_private *priv = dev->ml_priv;
 302         struct sockaddr *phwaddr = addr;
 303
 304         lbs_deb_enter(LBS_DEB_NET);
 305
 306         /*
 307          * Can only set MAC address when all interfaces are down, to be written
 308          * to the hardware when one of them is brought up.
 309          */
 310         if (lbs_iface_active(priv))
 311                 return -EBUSY;
 312
 313         /* In case it was called from the mesh device */
 314         dev = priv->dev;
 315
 316         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 317         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 318         if (priv->mesh_dev)
 319                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 320
 321         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 322         return ret;
 323 }
 324
 325
 326 static inline int mac_in_list(unsigned char *list, int list_len,
 327                               unsigned char *mac)
 328 {
 329         while (list_len) {
 330                 if (!memcmp(list, mac, ETH_ALEN))
 331                         return 1;
 332                 list += ETH_ALEN;
 333                 list_len--;
 334         }
 335         return 0;
 336 }
 337
 338
 339 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 340                                struct net_device *dev, int nr_addrs)
 341 {
 342         int i = nr_addrs;
 343         struct netdev_hw_addr *ha;
 344         int cnt;
 345
 346         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 347                 return nr_addrs;
 348
 349         netif_addr_lock_bh(dev);
 350         cnt = netdev_mc_count(dev);
 351         netdev_for_each_mc_addr(ha, dev) {
 352                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 353                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 354                                     ha->addr);
 355                         cnt--;
 356                         continue;
 357                 }
 358
 359                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 360                         break;
 361                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 362                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 363                             ha->addr);
 364                 i++;
 365                 cnt--;
 366         }
 367         netif_addr_unlock_bh(dev);
 368         if (cnt)
 369                 return -EOVERFLOW;
 370
 371         return i;
 372 }
 373
 374 void lbs_update_mcast(struct lbs_private *priv)
 375 {
 376         struct cmd_ds_mac_multicast_adr mcast_cmd;
 377         int dev_flags = 0;
 378         int nr_addrs;
 379         int old_mac_control = priv->mac_control;
 380
 381         lbs_deb_enter(LBS_DEB_NET);
 382
 383         if (netif_running(priv->dev))
 384                 dev_flags |= priv->dev->flags;
 385         if (priv->mesh_dev && netif_running(priv->mesh_dev))
 386                 dev_flags |= priv->mesh_dev->flags;
 387
 388         if (dev_flags & IFF_PROMISC) {
 389                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 390                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 391                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 392                 goto out_set_mac_control;
 393         } else if (dev_flags & IFF_ALLMULTI) {
 394         do_allmulti:
 395                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 396                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 397                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 398                 goto out_set_mac_control;
 399         }
 400
 401         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 402         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 403         if (nr_addrs >= 0 && priv->mesh_dev)
 404                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 405         if (nr_addrs < 0)
 406                 goto do_allmulti;
 407
 408         if (nr_addrs) {
 409                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 410                                     maclist[6*nr_addrs]);
 411
 412                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 413                 mcast_cmd.hdr.size = cpu_to_le16(size);
 414                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 415
 416                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 417
 418                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 419         } else
 420                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 421
 422         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 423                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 424  out_set_mac_control:
 425         if (priv->mac_control != old_mac_control)
 426                 lbs_set_mac_control(priv);
 427
 428         lbs_deb_leave(LBS_DEB_NET);
 429 }
 430
 431 static void lbs_set_mcast_worker(struct work_struct *work)
 432 {
 433         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 434         lbs_update_mcast(priv);
 435 }
 436
 437 void lbs_set_multicast_list(struct net_device *dev)
 438 {
 439         struct lbs_private *priv = dev->ml_priv;
 440
 441         schedule_work(&priv->mcast_work);
 442 }
 443
 444 /**
 445  *  lbs_thread - handles the major jobs in the LBS driver.
 446  *  It handles all events generated by firmware, RX data received
 447  *  from firmware and TX data sent from kernel.
 448  *
 449  *  @data:      A pointer to &lbs_thread structure
 450  *  returns:    0
 451  */
 452 static int lbs_thread(void *data)
 453 {
 454         struct net_device *dev = data;
 455         struct lbs_private *priv = dev->ml_priv;
 456         wait_queue_t wait;
 457
 458         lbs_deb_enter(LBS_DEB_THREAD);
 459
 460         init_waitqueue_entry(&wait, current);
 461
 462         for (;;) {
 463                 int shouldsleep;
 464                 u8 resp_idx;
 465
 466                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 467                                 priv->currenttxskb, priv->dnld_sent);
 468
 469                 add_wait_queue(&priv->waitq, &wait);
 470                 set_current_state(TASK_INTERRUPTIBLE);
 471                 spin_lock_irq(&priv->driver_lock);
 472
 473                 if (kthread_should_stop())
 474                         shouldsleep = 0;        /* Bye */
 475                 else if (priv->surpriseremoved)
 476                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 477                 else if (priv->psstate == PS_STATE_SLEEP)
 478                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 479                 else if (priv->cmd_timed_out)
 480                         shouldsleep = 0;        /* Command timed out. Recover */
 481                 else if (!priv->fw_ready)
 482                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 483                 else if (priv->dnld_sent)
 484                         shouldsleep = 1;        /* Something is en route to the device already */
 485                 else if (priv->tx_pending_len > 0)
 486                         shouldsleep = 0;        /* We've a packet to send */
 487                 else if (priv->resp_len[priv->resp_idx])
 488                         shouldsleep = 0;        /* We have a command response */
 489                 else if (priv->cur_cmd)
 490                         shouldsleep = 1;        /* Can't send a command; one already running */
 491                 else if (!list_empty(&priv->cmdpendingq) &&
 492                                         !(priv->wakeup_dev_required))
 493                         shouldsleep = 0;        /* We have a command to send */
 494                 else if (kfifo_len(&priv->event_fifo))
 495                         shouldsleep = 0;        /* We have an event to process */
 496                 else
 497                         shouldsleep = 1;        /* No command */
 498
 499                 if (shouldsleep) {
 500                         lbs_deb_thread("sleeping, connect_status %d, "
 501                                 "psmode %d, psstate %d\n",
 502                                 priv->connect_status,
 503                                 priv->psmode, priv->psstate);
 504                         spin_unlock_irq(&priv->driver_lock);
 505                         schedule();
 506                 } else
 507                         spin_unlock_irq(&priv->driver_lock);
 508
 509                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 510                                priv->currenttxskb, priv->dnld_sent);
 511
 512                 set_current_state(TASK_RUNNING);
 513                 remove_wait_queue(&priv->waitq, &wait);
 514
 515                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 516                                priv->currenttxskb, priv->dnld_sent);
 517
 518                 if (kthread_should_stop()) {
 519                         lbs_deb_thread("break from main thread\n");
 520                         break;
 521                 }
 522
 523                 if (priv->surpriseremoved) {
 524                         lbs_deb_thread("adapter removed; waiting to die...\n");
 525                         continue;
 526                 }
 527
 528                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 529                        priv->currenttxskb, priv->dnld_sent);
 530
 531                 /* Process any pending command response */
 532                 spin_lock_irq(&priv->driver_lock);
 533                 resp_idx = priv->resp_idx;
 534                 if (priv->resp_len[resp_idx]) {
 535                         spin_unlock_irq(&priv->driver_lock);
 536                         lbs_process_command_response(priv,
 537                                 priv->resp_buf[resp_idx],
 538                                 priv->resp_len[resp_idx]);
 539                         spin_lock_irq(&priv->driver_lock);
 540                         priv->resp_len[resp_idx] = 0;
 541                 }
 542                 spin_unlock_irq(&priv->driver_lock);
 543
 544                 /* Process hardware events, e.g. card removed, link lost */
 545                 spin_lock_irq(&priv->driver_lock);
 546                 while (kfifo_len(&priv->event_fifo)) {
 547                         u32 event;
 548
 549                         if (kfifo_out(&priv->event_fifo,
 550                                 (unsigned char *) &event, sizeof(event)) !=
 551                                 sizeof(event))
 552                                         break;
 553                         spin_unlock_irq(&priv->driver_lock);
 554                         lbs_process_event(priv, event);
 555                         spin_lock_irq(&priv->driver_lock);
 556                 }
 557                 spin_unlock_irq(&priv->driver_lock);
 558
 559                 if (priv->wakeup_dev_required) {
 560                         lbs_deb_thread("Waking up device...\n");
 561                         /* Wake up device */
 562                         if (priv->exit_deep_sleep(priv))
 563                                 lbs_deb_thread("Wakeup device failed\n");
 564                         continue;
 565                 }
 566
 567                 /* command timeout stuff */
 568                 if (priv->cmd_timed_out && priv->cur_cmd) {
 569                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 570
 571                         netdev_info(dev, "Timeout submitting command 0x%04x\n",
 572                                     le16_to_cpu(cmdnode->cmdbuf->command));
 573                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 574
 575                         /* Reset card, but only when it isn't in the process
 576                          * of being shutdown anyway. */
 577                         if (!dev->dismantle && priv->reset_card)
 578                                 priv->reset_card(priv);
 579                 }
 580                 priv->cmd_timed_out = 0;
 581
 582                 if (!priv->fw_ready)
 583                         continue;
 584
 585                 /* Check if we need to confirm Sleep Request received previously */
 586                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 587                     !priv->dnld_sent && !priv->cur_cmd) {
 588                         if (priv->connect_status == LBS_CONNECTED) {
 589                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 590                                         "dnld_sent %d, cur_cmd %p\n",
 591                                         priv->currenttxskb, priv->dnld_sent,
 592                                         priv->cur_cmd);
 593
 594                                 lbs_ps_confirm_sleep(priv);
 595                         } else {
 596                                 /* workaround for firmware sending
 597                                  * deauth/linkloss event immediately
 598                                  * after sleep request; remove this
 599                                  * after firmware fixes it
 600                                  */
 601                                 priv->psstate = PS_STATE_AWAKE;
 602                                 netdev_alert(dev,
 603                                              "ignore PS_SleepConfirm in non-connected state\n");
 604                         }
 605                 }
 606
 607                 /* The PS state is changed during processing of Sleep Request
 608                  * event above
 609                  */
 610                 if ((priv->psstate == PS_STATE_SLEEP) ||
 611                     (priv->psstate == PS_STATE_PRE_SLEEP))
 612                         continue;
 613
 614                 if (priv->is_deep_sleep)
 615                         continue;
 616
 617                 /* Execute the next command */
 618                 if (!priv->dnld_sent && !priv->cur_cmd)
 619                         lbs_execute_next_command(priv);
 620
 621                 spin_lock_irq(&priv->driver_lock);
 622                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 623                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 624                                                         priv->tx_pending_buf,
 625                                                         priv->tx_pending_len);
 626                         if (ret) {
 627                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 628                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 629                         } else {
 630                                 mod_timer(&priv->tx_lockup_timer,
 631                                           jiffies + (HZ * 5));
 632                         }
 633                         priv->tx_pending_len = 0;
 634                         if (!priv->currenttxskb) {
 635                                 /* We can wake the queues immediately if we aren't
 636                                    waiting for TX feedback */
 637                                 if (priv->connect_status == LBS_CONNECTED)
 638                                         netif_wake_queue(priv->dev);
 639                                 if (priv->mesh_dev &&
 640                                     netif_running(priv->mesh_dev))
 641                                         netif_wake_queue(priv->mesh_dev);
 642                         }
 643                 }
 644                 spin_unlock_irq(&priv->driver_lock);
 645         }
 646
 647         del_timer(&priv->command_timer);
 648         del_timer(&priv->tx_lockup_timer);
 649         del_timer(&priv->auto_deepsleep_timer);
 650
 651         lbs_deb_leave(LBS_DEB_THREAD);
 652         return 0;
 653 }
 654
 655 /**
 656  * lbs_setup_firmware - gets the HW spec from the firmware and sets
 657  *        some basic parameters
 658  *
 659  *  @priv:      A pointer to &struct lbs_private structure
 660  *  returns:    0 or -1
 661  */
 662 static int lbs_setup_firmware(struct lbs_private *priv)
 663 {
 664         int ret = -1;
 665         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 666
 667         lbs_deb_enter(LBS_DEB_FW);
 668
 669         /* Read MAC address from firmware */
 670         memset(priv->current_addr, 0xff, ETH_ALEN);
 671         ret = lbs_update_hw_spec(priv);
 672         if (ret)
 673                 goto done;
 674
 675         /* Read power levels if available */
 676         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 677         if (ret == 0) {
 678                 priv->txpower_cur = curlevel;
 679                 priv->txpower_min = minlevel;
 680                 priv->txpower_max = maxlevel;
 681         }
 682
 683         /* Send cmd to FW to enable 11D function */
 684         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
 685
 686         lbs_set_mac_control(priv);
 687 done:
 688         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 689         return ret;
 690 }
 691
 692 int lbs_suspend(struct lbs_private *priv)
 693 {
 694         int ret;
 695
 696         lbs_deb_enter(LBS_DEB_FW);
 697
 698         if (priv->is_deep_sleep) {
 699                 ret = lbs_set_deep_sleep(priv, 0);
 700                 if (ret) {
 701                         netdev_err(priv->dev,
 702                                    "deep sleep cancellation failed: %d\n", ret);
 703                         return ret;
 704                 }
 705                 priv->deep_sleep_required = 1;
 706         }
 707
 708         ret = lbs_set_host_sleep(priv, 1);
 709
 710         netif_device_detach(priv->dev);
 711         if (priv->mesh_dev)
 712                 netif_device_detach(priv->mesh_dev);
 713
 714         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 715         return ret;
 716 }
 717 EXPORT_SYMBOL_GPL(lbs_suspend);
 718
 719 int lbs_resume(struct lbs_private *priv)
 720 {
 721         int ret;
 722
 723         lbs_deb_enter(LBS_DEB_FW);
 724
 725         ret = lbs_set_host_sleep(priv, 0);
 726
 727         netif_device_attach(priv->dev);
 728         if (priv->mesh_dev)
 729                 netif_device_attach(priv->mesh_dev);
 730
 731         if (priv->deep_sleep_required) {
 732                 priv->deep_sleep_required = 0;
 733                 ret = lbs_set_deep_sleep(priv, 1);
 734                 if (ret)
 735                         netdev_err(priv->dev,
 736                                    "deep sleep activation failed: %d\n", ret);
 737         }
 738
 739         if (priv->setup_fw_on_resume)
 740                 ret = lbs_setup_firmware(priv);
 741
 742         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 743         return ret;
 744 }
 745 EXPORT_SYMBOL_GPL(lbs_resume);
 746
 747 /**
 748  * lbs_cmd_timeout_handler - handles the timeout of command sending.
 749  * It will re-send the same command again.
 750  *
 751  * @data: &struct lbs_private pointer
 752  */
 753 static void lbs_cmd_timeout_handler(unsigned long data)
 754 {
 755         struct lbs_private *priv = (struct lbs_private *)data;
 756         unsigned long flags;
 757
 758         lbs_deb_enter(LBS_DEB_CMD);
 759         spin_lock_irqsave(&priv->driver_lock, flags);
 760
 761         if (!priv->cur_cmd)
 762                 goto out;
 763
 764         netdev_info(priv->dev, "command 0x%04x timed out\n",
 765                     le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 766
 767         priv->cmd_timed_out = 1;
 768
 769         /*
 770          * If the device didn't even acknowledge the command, reset the state
 771          * so that we don't block all future commands due to this one timeout.
 772          */
 773         if (priv->dnld_sent == DNLD_CMD_SENT)
 774                 priv->dnld_sent = DNLD_RES_RECEIVED;
 775
 776         wake_up(&priv->waitq);
 777 out:
 778         spin_unlock_irqrestore(&priv->driver_lock, flags);
 779         lbs_deb_leave(LBS_DEB_CMD);
 780 }
 781
 782 /**
 783  * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
 784  * to the hardware. This is known to frequently happen with SD8686 when
 785  * waking up after a Wake-on-WLAN-triggered resume.
 786  *
 787  * @data: &struct lbs_private pointer
 788  */
 789 static void lbs_tx_lockup_handler(unsigned long data)
 790 {
 791         struct lbs_private *priv = (struct lbs_private *)data;
 792         unsigned long flags;
 793
 794         lbs_deb_enter(LBS_DEB_TX);
 795         spin_lock_irqsave(&priv->driver_lock, flags);
 796
 797         netdev_info(priv->dev, "TX lockup detected\n");
 798         if (priv->reset_card)
 799                 priv->reset_card(priv);
 800
 801         priv->dnld_sent = DNLD_RES_RECEIVED;
 802         wake_up_interruptible(&priv->waitq);
 803
 804         spin_unlock_irqrestore(&priv->driver_lock, flags);
 805         lbs_deb_leave(LBS_DEB_TX);
 806 }
 807
 808 /**
 809  * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
 810  * timer expires and no activity (command, event, data etc.) is detected.
 811  * @data:       &struct lbs_private pointer
 812  * returns:     N/A
 813  */
 814 static void auto_deepsleep_timer_fn(unsigned long data)
 815 {
 816         struct lbs_private *priv = (struct lbs_private *)data;
 817
 818         lbs_deb_enter(LBS_DEB_CMD);
 819
 820         if (priv->is_activity_detected) {
 821                 priv->is_activity_detected = 0;
 822         } else {
 823                 if (priv->is_auto_deep_sleep_enabled &&
 824                     (!priv->wakeup_dev_required) &&
 825                     (priv->connect_status != LBS_CONNECTED)) {
 826                         struct cmd_header cmd;
 827
 828                         lbs_deb_main("Entering auto deep sleep mode...\n");
 829                         memset(&cmd, 0, sizeof(cmd));
 830                         cmd.size = cpu_to_le16(sizeof(cmd));
 831                         lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
 832                                         sizeof(cmd));
 833                 }
 834         }
 835         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 836                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 837         lbs_deb_leave(LBS_DEB_CMD);
 838 }
 839
 840 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 841 {
 842         lbs_deb_enter(LBS_DEB_SDIO);
 843
 844         priv->is_auto_deep_sleep_enabled = 1;
 845         if (priv->is_deep_sleep)
 846                 priv->wakeup_dev_required = 1;
 847         mod_timer(&priv->auto_deepsleep_timer ,
 848                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 849
 850         lbs_deb_leave(LBS_DEB_SDIO);
 851         return 0;
 852 }
 853
 854 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 855 {
 856         lbs_deb_enter(LBS_DEB_SDIO);
 857
 858         priv->is_auto_deep_sleep_enabled = 0;
 859         priv->auto_deep_sleep_timeout = 0;
 860         del_timer(&priv->auto_deepsleep_timer);
 861
 862         lbs_deb_leave(LBS_DEB_SDIO);
 863         return 0;
 864 }
 865
 866 static int lbs_init_adapter(struct lbs_private *priv)
 867 {
 868         int ret;
 869
 870         lbs_deb_enter(LBS_DEB_MAIN);
 871
 872         memset(priv->current_addr, 0xff, ETH_ALEN);
 873
 874         priv->connect_status = LBS_DISCONNECTED;
 875         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 876         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 877         priv->radio_on = 1;
 878         priv->psmode = LBS802_11POWERMODECAM;
 879         priv->psstate = PS_STATE_FULL_POWER;
 880         priv->is_deep_sleep = 0;
 881         priv->is_auto_deep_sleep_enabled = 0;
 882         priv->deep_sleep_required = 0;
 883         priv->wakeup_dev_required = 0;
 884         init_waitqueue_head(&priv->ds_awake_q);
 885         init_waitqueue_head(&priv->scan_q);
 886         priv->authtype_auto = 1;
 887         priv->is_host_sleep_configured = 0;
 888         priv->is_host_sleep_activated = 0;
 889         init_waitqueue_head(&priv->host_sleep_q);
 890         init_waitqueue_head(&priv->fw_waitq);
 891         mutex_init(&priv->lock);
 892
 893         setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
 894                 (unsigned long)priv);
 895         setup_timer(&priv->tx_lockup_timer, lbs_tx_lockup_handler,
 896                 (unsigned long)priv);
 897         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 898                         (unsigned long)priv);
 899
 900         INIT_LIST_HEAD(&priv->cmdfreeq);
 901         INIT_LIST_HEAD(&priv->cmdpendingq);
 902
 903         spin_lock_init(&priv->driver_lock);
 904
 905         /* Allocate the command buffers */
 906         if (lbs_allocate_cmd_buffer(priv)) {
 907                 pr_err("Out of memory allocating command buffers\n");
 908                 ret = -ENOMEM;
 909                 goto out;
 910         }
 911         priv->resp_idx = 0;
 912         priv->resp_len[0] = priv->resp_len[1] = 0;
 913
 914         /* Create the event FIFO */
 915         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 916         if (ret) {
 917                 pr_err("Out of memory allocating event FIFO buffer\n");
 918                 goto out;
 919         }
 920
 921 out:
 922         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 923
 924         return ret;
 925 }
 926
 927 static void lbs_free_adapter(struct lbs_private *priv)
 928 {
 929         lbs_deb_enter(LBS_DEB_MAIN);
 930
 931         lbs_free_cmd_buffer(priv);
 932         kfifo_free(&priv->event_fifo);
 933         del_timer(&priv->command_timer);
 934         del_timer(&priv->tx_lockup_timer);
 935         del_timer(&priv->auto_deepsleep_timer);
 936
 937         lbs_deb_leave(LBS_DEB_MAIN);
 938 }
 939
 940 static const struct net_device_ops lbs_netdev_ops = {
 941         .ndo_open               = lbs_dev_open,
 942         .ndo_stop               = lbs_eth_stop,
 943         .ndo_start_xmit         = lbs_hard_start_xmit,
 944         .ndo_set_mac_address    = lbs_set_mac_address,
 945         .ndo_set_rx_mode        = lbs_set_multicast_list,
 946         .ndo_change_mtu         = eth_change_mtu,
 947         .ndo_validate_addr      = eth_validate_addr,
 948 };
 949
 950 /**
 951  * lbs_add_card - adds the card. It will probe the
 952  * card, allocate the lbs_priv and initialize the device.
 953  *
 954  * @card:       A pointer to card
 955  * @dmdev:      A pointer to &struct device
 956  * returns:     A pointer to &struct lbs_private structure
 957  */
 958 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 959 {
 960         struct net_device *dev;
 961         struct wireless_dev *wdev;
 962         struct lbs_private *priv = NULL;
 963
 964         lbs_deb_enter(LBS_DEB_MAIN);
 965
 966         /* Allocate an Ethernet device and register it */
 967         wdev = lbs_cfg_alloc(dmdev);
 968         if (IS_ERR(wdev)) {
 969                 pr_err("cfg80211 init failed\n");
 970                 goto done;
 971         }
 972
 973         wdev->iftype = NL80211_IFTYPE_STATION;
 974         priv = wdev_priv(wdev);
 975         priv->wdev = wdev;
 976
 977         if (lbs_init_adapter(priv)) {
 978                 pr_err("failed to initialize adapter structure\n");
 979                 goto err_wdev;
 980         }
 981
 982         dev = alloc_netdev(0, "wlan%d", ether_setup);
 983         if (!dev) {
 984                 dev_err(dmdev, "no memory for network device instance\n");
 985                 goto err_adapter;
 986         }
 987
 988         dev->ieee80211_ptr = wdev;
 989         dev->ml_priv = priv;
 990         SET_NETDEV_DEV(dev, dmdev);
 991         wdev->netdev = dev;
 992         priv->dev = dev;
 993
 994         dev->netdev_ops = &lbs_netdev_ops;
 995         dev->watchdog_timeo = 5 * HZ;
 996         dev->ethtool_ops = &lbs_ethtool_ops;
 997         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 998
 999         priv->card = card;
1000
1001         strcpy(dev->name, "wlan%d");
1002
1003         lbs_deb_thread("Starting main thread...\n");
1004         init_waitqueue_head(&priv->waitq);
1005         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
1006         if (IS_ERR(priv->main_thread)) {
1007                 lbs_deb_thread("Error creating main thread.\n");
1008                 goto err_ndev;
1009         }
1010
1011         priv->work_thread = create_singlethread_workqueue("lbs_worker");
1012         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1013
1014         priv->wol_criteria = EHS_REMOVE_WAKEUP;
1015         priv->wol_gpio = 0xff;
1016         priv->wol_gap = 20;
1017         priv->ehs_remove_supported = true;
1018
1019         goto done;
1020
1021  err_ndev:
1022         free_netdev(dev);
1023
1024  err_adapter:
1025         lbs_free_adapter(priv);
1026
1027  err_wdev:
1028         lbs_cfg_free(priv);
1029
1030         priv = NULL;
1031
1032 done:
1033         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1034         return priv;
1035 }
1036 EXPORT_SYMBOL_GPL(lbs_add_card);
1037
1038
1039 void lbs_remove_card(struct lbs_private *priv)
1040 {
1041         struct net_device *dev = priv->dev;
1042
1043         lbs_deb_enter(LBS_DEB_MAIN);
1044
1045         lbs_remove_mesh(priv);
1046
1047         if (priv->wiphy_registered)
1048                 lbs_scan_deinit(priv);
1049
1050         lbs_wait_for_firmware_load(priv);
1051
1052         /* worker thread destruction blocks on the in-flight command which
1053          * should have been cleared already in lbs_stop_card().
1054          */
1055         lbs_deb_main("destroying worker thread\n");
1056         destroy_workqueue(priv->work_thread);
1057         lbs_deb_main("done destroying worker thread\n");
1058
1059         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1060                 priv->psmode = LBS802_11POWERMODECAM;
1061                 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1062         }
1063
1064         if (priv->is_deep_sleep) {
1065                 priv->is_deep_sleep = 0;
1066                 wake_up_interruptible(&priv->ds_awake_q);
1067         }
1068
1069         priv->is_host_sleep_configured = 0;
1070         priv->is_host_sleep_activated = 0;
1071         wake_up_interruptible(&priv->host_sleep_q);
1072
1073         /* Stop the thread servicing the interrupts */
1074         priv->surpriseremoved = 1;
1075         kthread_stop(priv->main_thread);
1076
1077         lbs_free_adapter(priv);
1078         lbs_cfg_free(priv);
1079         free_netdev(dev);
1080
1081         lbs_deb_leave(LBS_DEB_MAIN);
1082 }
1083 EXPORT_SYMBOL_GPL(lbs_remove_card);
1084
1085
1086 int lbs_rtap_supported(struct lbs_private *priv)
1087 {
1088         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1089                 return 1;
1090
1091         /* newer firmware use a capability mask */
1092         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1093                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1094 }
1095
1096
1097 int lbs_start_card(struct lbs_private *priv)
1098 {
1099         struct net_device *dev = priv->dev;
1100         int ret = -1;
1101
1102         lbs_deb_enter(LBS_DEB_MAIN);
1103
1104         /* poke the firmware */
1105         ret = lbs_setup_firmware(priv);
1106         if (ret)
1107                 goto done;
1108
1109         if (!lbs_disablemesh)
1110                 lbs_init_mesh(priv);
1111         else
1112                 pr_info("%s: mesh disabled\n", dev->name);
1113
1114         if (lbs_cfg_register(priv)) {
1115                 pr_err("cannot register device\n");
1116                 goto done;
1117         }
1118
1119         if (lbs_mesh_activated(priv))
1120                 lbs_start_mesh(priv);
1121
1122         lbs_debugfs_init_one(priv, dev);
1123
1124         netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1125
1126         ret = 0;
1127
1128 done:
1129         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1130         return ret;
1131 }
1132 EXPORT_SYMBOL_GPL(lbs_start_card);
1133
1134
1135 void lbs_stop_card(struct lbs_private *priv)
1136 {
1137         struct net_device *dev;
1138
1139         lbs_deb_enter(LBS_DEB_MAIN);
1140
1141         if (!priv)
1142                 goto out;
1143         dev = priv->dev;
1144
1145         /* If the netdev isn't registered, it means that lbs_start_card() was
1146          * never called so we have nothing to do here. */
1147         if (dev->reg_state != NETREG_REGISTERED)
1148                 goto out;
1149
1150         netif_stop_queue(dev);
1151         netif_carrier_off(dev);
1152
1153         lbs_debugfs_remove_one(priv);
1154         lbs_deinit_mesh(priv);
1155         unregister_netdev(dev);
1156
1157 out:
1158         lbs_deb_leave(LBS_DEB_MAIN);
1159 }
1160 EXPORT_SYMBOL_GPL(lbs_stop_card);
1161
1162
1163 void lbs_queue_event(struct lbs_private *priv, u32 event)
1164 {
1165         unsigned long flags;
1166
1167         lbs_deb_enter(LBS_DEB_THREAD);
1168         spin_lock_irqsave(&priv->driver_lock, flags);
1169
1170         if (priv->psstate == PS_STATE_SLEEP)
1171                 priv->psstate = PS_STATE_AWAKE;
1172
1173         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1174
1175         wake_up(&priv->waitq);
1176
1177         spin_unlock_irqrestore(&priv->driver_lock, flags);
1178         lbs_deb_leave(LBS_DEB_THREAD);
1179 }
1180 EXPORT_SYMBOL_GPL(lbs_queue_event);
1181
1182 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1183 {
1184         lbs_deb_enter(LBS_DEB_THREAD);
1185
1186         if (priv->psstate == PS_STATE_SLEEP)
1187                 priv->psstate = PS_STATE_AWAKE;
1188
1189         /* Swap buffers by flipping the response index */
1190         BUG_ON(resp_idx > 1);
1191         priv->resp_idx = resp_idx;
1192
1193         wake_up(&priv->waitq);
1194
1195         lbs_deb_leave(LBS_DEB_THREAD);
1196 }
1197 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1198
1199 static int __init lbs_init_module(void)
1200 {
1201         lbs_deb_enter(LBS_DEB_MAIN);
1202         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1203         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1204         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1205         confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1206         lbs_debugfs_init();
1207         lbs_deb_leave(LBS_DEB_MAIN);
1208         return 0;
1209 }
1210
1211 static void __exit lbs_exit_module(void)
1212 {
1213         lbs_deb_enter(LBS_DEB_MAIN);
1214         lbs_debugfs_remove();
1215         lbs_deb_leave(LBS_DEB_MAIN);
1216 }
1217
1218 module_init(lbs_init_module);
1219 module_exit(lbs_exit_module);
1220
1221 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1222 MODULE_AUTHOR("Marvell International Ltd.");
1223 MODULE_LICENSE("GPL");