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