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/moduleparam.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_start_iface(struct lbs_private *priv)
 103 {
 104         struct cmd_ds_802_11_mac_address cmd;
 105         int ret;
 106
 107         if (priv->power_restore) {
 108                 ret = priv->power_restore(priv);
 109                 if (ret)
 110                         return ret;
 111         }
 112
 113         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 114         cmd.action = cpu_to_le16(CMD_ACT_SET);
 115         memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
 116
 117         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 118         if (ret) {
 119                 lbs_deb_net("set MAC address failed\n");
 120                 goto err;
 121         }
 122
 123         lbs_update_channel(priv);
 124
 125         priv->iface_running = true;
 126         return 0;
 127
 128 err:
 129         if (priv->power_save)
 130                 priv->power_save(priv);
 131         return ret;
 132 }
 133
 134 /**
 135  *  lbs_dev_open - open the ethX interface
 136  *
 137  *  @dev:       A pointer to &net_device structure
 138  *  returns:    0 or -EBUSY if monitor mode active
 139  */
 140 static int lbs_dev_open(struct net_device *dev)
 141 {
 142         struct lbs_private *priv = dev->ml_priv;
 143         int ret = 0;
 144
 145         lbs_deb_enter(LBS_DEB_NET);
 146         if (!priv->iface_running) {
 147                 ret = lbs_start_iface(priv);
 148                 if (ret)
 149                         goto out;
 150         }
 151
 152         spin_lock_irq(&priv->driver_lock);
 153
 154         netif_carrier_off(dev);
 155
 156         if (!priv->tx_pending_len)
 157                 netif_wake_queue(dev);
 158
 159         spin_unlock_irq(&priv->driver_lock);
 160
 161 out:
 162         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 163         return ret;
 164 }
 165
 166 static bool lbs_command_queue_empty(struct lbs_private *priv)
 167 {
 168         unsigned long flags;
 169         bool ret;
 170         spin_lock_irqsave(&priv->driver_lock, flags);
 171         ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
 172         spin_unlock_irqrestore(&priv->driver_lock, flags);
 173         return ret;
 174 }
 175
 176 int lbs_stop_iface(struct lbs_private *priv)
 177 {
 178         unsigned long flags;
 179         int ret = 0;
 180
 181         lbs_deb_enter(LBS_DEB_MAIN);
 182
 183         spin_lock_irqsave(&priv->driver_lock, flags);
 184         priv->iface_running = false;
 185         kfree_skb(priv->currenttxskb);
 186         priv->currenttxskb = NULL;
 187         priv->tx_pending_len = 0;
 188         spin_unlock_irqrestore(&priv->driver_lock, flags);
 189
 190         cancel_work_sync(&priv->mcast_work);
 191
 192         /* Disable command processing, and wait for all commands to complete */
 193         lbs_deb_main("waiting for commands to complete\n");
 194         wait_event(priv->waitq, lbs_command_queue_empty(priv));
 195         lbs_deb_main("all commands completed\n");
 196
 197         if (priv->power_save)
 198                 ret = priv->power_save(priv);
 199
 200         lbs_deb_leave(LBS_DEB_MAIN);
 201         return ret;
 202 }
 203
 204 /**
 205  *  lbs_eth_stop - close the ethX interface
 206  *
 207  *  @dev:       A pointer to &net_device structure
 208  *  returns:    0
 209  */
 210 static int lbs_eth_stop(struct net_device *dev)
 211 {
 212         struct lbs_private *priv = dev->ml_priv;
 213
 214         lbs_deb_enter(LBS_DEB_NET);
 215
 216         if (priv->connect_status == LBS_CONNECTED)
 217                 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
 218
 219         spin_lock_irq(&priv->driver_lock);
 220         netif_stop_queue(dev);
 221         spin_unlock_irq(&priv->driver_lock);
 222
 223         lbs_update_mcast(priv);
 224         cancel_delayed_work_sync(&priv->scan_work);
 225         if (priv->scan_req) {
 226                 cfg80211_scan_done(priv->scan_req, false);
 227                 priv->scan_req = NULL;
 228         }
 229
 230         netif_carrier_off(priv->dev);
 231
 232         if (!lbs_iface_active(priv))
 233                 lbs_stop_iface(priv);
 234
 235         lbs_deb_leave(LBS_DEB_NET);
 236         return 0;
 237 }
 238
 239 void lbs_host_to_card_done(struct lbs_private *priv)
 240 {
 241         unsigned long flags;
 242
 243         lbs_deb_enter(LBS_DEB_THREAD);
 244
 245         spin_lock_irqsave(&priv->driver_lock, flags);
 246
 247         priv->dnld_sent = DNLD_RES_RECEIVED;
 248
 249         /* Wake main thread if commands are pending */
 250         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 251                 if (!priv->wakeup_dev_required)
 252                         wake_up(&priv->waitq);
 253         }
 254
 255         spin_unlock_irqrestore(&priv->driver_lock, flags);
 256         lbs_deb_leave(LBS_DEB_THREAD);
 257 }
 258 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 259
 260 int lbs_set_mac_address(struct net_device *dev, void *addr)
 261 {
 262         int ret = 0;
 263         struct lbs_private *priv = dev->ml_priv;
 264         struct sockaddr *phwaddr = addr;
 265
 266         lbs_deb_enter(LBS_DEB_NET);
 267
 268         /*
 269          * Can only set MAC address when all interfaces are down, to be written
 270          * to the hardware when one of them is brought up.
 271          */
 272         if (lbs_iface_active(priv))
 273                 return -EBUSY;
 274
 275         /* In case it was called from the mesh device */
 276         dev = priv->dev;
 277
 278         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 279         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 280         if (priv->mesh_dev)
 281                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 282
 283         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 284         return ret;
 285 }
 286
 287
 288 static inline int mac_in_list(unsigned char *list, int list_len,
 289                               unsigned char *mac)
 290 {
 291         while (list_len) {
 292                 if (!memcmp(list, mac, ETH_ALEN))
 293                         return 1;
 294                 list += ETH_ALEN;
 295                 list_len--;
 296         }
 297         return 0;
 298 }
 299
 300
 301 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 302                                struct net_device *dev, int nr_addrs)
 303 {
 304         int i = nr_addrs;
 305         struct netdev_hw_addr *ha;
 306         int cnt;
 307
 308         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 309                 return nr_addrs;
 310
 311         netif_addr_lock_bh(dev);
 312         cnt = netdev_mc_count(dev);
 313         netdev_for_each_mc_addr(ha, dev) {
 314                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 315                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 316                                     ha->addr);
 317                         cnt--;
 318                         continue;
 319                 }
 320
 321                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 322                         break;
 323                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 324                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 325                             ha->addr);
 326                 i++;
 327                 cnt--;
 328         }
 329         netif_addr_unlock_bh(dev);
 330         if (cnt)
 331                 return -EOVERFLOW;
 332
 333         return i;
 334 }
 335
 336 void lbs_update_mcast(struct lbs_private *priv)
 337 {
 338         struct cmd_ds_mac_multicast_adr mcast_cmd;
 339         int dev_flags = 0;
 340         int nr_addrs;
 341         int old_mac_control = priv->mac_control;
 342
 343         lbs_deb_enter(LBS_DEB_NET);
 344
 345         if (netif_running(priv->dev))
 346                 dev_flags |= priv->dev->flags;
 347         if (priv->mesh_dev && netif_running(priv->mesh_dev))
 348                 dev_flags |= priv->mesh_dev->flags;
 349
 350         if (dev_flags & IFF_PROMISC) {
 351                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 352                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 353                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 354                 goto out_set_mac_control;
 355         } else if (dev_flags & IFF_ALLMULTI) {
 356         do_allmulti:
 357                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 358                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 359                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 360                 goto out_set_mac_control;
 361         }
 362
 363         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 364         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 365         if (nr_addrs >= 0 && priv->mesh_dev)
 366                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 367         if (nr_addrs < 0)
 368                 goto do_allmulti;
 369
 370         if (nr_addrs) {
 371                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 372                                     maclist[6*nr_addrs]);
 373
 374                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 375                 mcast_cmd.hdr.size = cpu_to_le16(size);
 376                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 377
 378                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 379
 380                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 381         } else
 382                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 383
 384         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 385                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 386  out_set_mac_control:
 387         if (priv->mac_control != old_mac_control)
 388                 lbs_set_mac_control(priv);
 389
 390         lbs_deb_leave(LBS_DEB_NET);
 391 }
 392
 393 static void lbs_set_mcast_worker(struct work_struct *work)
 394 {
 395         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 396         lbs_update_mcast(priv);
 397 }
 398
 399 void lbs_set_multicast_list(struct net_device *dev)
 400 {
 401         struct lbs_private *priv = dev->ml_priv;
 402
 403         schedule_work(&priv->mcast_work);
 404 }
 405
 406 /**
 407  *  lbs_thread - handles the major jobs in the LBS driver.
 408  *  It handles all events generated by firmware, RX data received
 409  *  from firmware and TX data sent from kernel.
 410  *
 411  *  @data:      A pointer to &lbs_thread structure
 412  *  returns:    0
 413  */
 414 static int lbs_thread(void *data)
 415 {
 416         struct net_device *dev = data;
 417         struct lbs_private *priv = dev->ml_priv;
 418         wait_queue_t wait;
 419
 420         lbs_deb_enter(LBS_DEB_THREAD);
 421
 422         init_waitqueue_entry(&wait, current);
 423
 424         for (;;) {
 425                 int shouldsleep;
 426                 u8 resp_idx;
 427
 428                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 429                                 priv->currenttxskb, priv->dnld_sent);
 430
 431                 add_wait_queue(&priv->waitq, &wait);
 432                 set_current_state(TASK_INTERRUPTIBLE);
 433                 spin_lock_irq(&priv->driver_lock);
 434
 435                 if (kthread_should_stop())
 436                         shouldsleep = 0;        /* Bye */
 437                 else if (priv->surpriseremoved)
 438                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 439                 else if (priv->psstate == PS_STATE_SLEEP)
 440                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 441                 else if (priv->cmd_timed_out)
 442                         shouldsleep = 0;        /* Command timed out. Recover */
 443                 else if (!priv->fw_ready)
 444                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 445                 else if (priv->dnld_sent)
 446                         shouldsleep = 1;        /* Something is en route to the device already */
 447                 else if (priv->tx_pending_len > 0)
 448                         shouldsleep = 0;        /* We've a packet to send */
 449                 else if (priv->resp_len[priv->resp_idx])
 450                         shouldsleep = 0;        /* We have a command response */
 451                 else if (priv->cur_cmd)
 452                         shouldsleep = 1;        /* Can't send a command; one already running */
 453                 else if (!list_empty(&priv->cmdpendingq) &&
 454                                         !(priv->wakeup_dev_required))
 455                         shouldsleep = 0;        /* We have a command to send */
 456                 else if (kfifo_len(&priv->event_fifo))
 457                         shouldsleep = 0;        /* We have an event to process */
 458                 else
 459                         shouldsleep = 1;        /* No command */
 460
 461                 if (shouldsleep) {
 462                         lbs_deb_thread("sleeping, connect_status %d, "
 463                                 "psmode %d, psstate %d\n",
 464                                 priv->connect_status,
 465                                 priv->psmode, priv->psstate);
 466                         spin_unlock_irq(&priv->driver_lock);
 467                         schedule();
 468                 } else
 469                         spin_unlock_irq(&priv->driver_lock);
 470
 471                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 472                                priv->currenttxskb, priv->dnld_sent);
 473
 474                 set_current_state(TASK_RUNNING);
 475                 remove_wait_queue(&priv->waitq, &wait);
 476
 477                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 478                                priv->currenttxskb, priv->dnld_sent);
 479
 480                 if (kthread_should_stop()) {
 481                         lbs_deb_thread("break from main thread\n");
 482                         break;
 483                 }
 484
 485                 if (priv->surpriseremoved) {
 486                         lbs_deb_thread("adapter removed; waiting to die...\n");
 487                         continue;
 488                 }
 489
 490                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 491                        priv->currenttxskb, priv->dnld_sent);
 492
 493                 /* Process any pending command response */
 494                 spin_lock_irq(&priv->driver_lock);
 495                 resp_idx = priv->resp_idx;
 496                 if (priv->resp_len[resp_idx]) {
 497                         spin_unlock_irq(&priv->driver_lock);
 498                         lbs_process_command_response(priv,
 499                                 priv->resp_buf[resp_idx],
 500                                 priv->resp_len[resp_idx]);
 501                         spin_lock_irq(&priv->driver_lock);
 502                         priv->resp_len[resp_idx] = 0;
 503                 }
 504                 spin_unlock_irq(&priv->driver_lock);
 505
 506                 /* Process hardware events, e.g. card removed, link lost */
 507                 spin_lock_irq(&priv->driver_lock);
 508                 while (kfifo_len(&priv->event_fifo)) {
 509                         u32 event;
 510
 511                         if (kfifo_out(&priv->event_fifo,
 512                                 (unsigned char *) &event, sizeof(event)) !=
 513                                 sizeof(event))
 514                                         break;
 515                         spin_unlock_irq(&priv->driver_lock);
 516                         lbs_process_event(priv, event);
 517                         spin_lock_irq(&priv->driver_lock);
 518                 }
 519                 spin_unlock_irq(&priv->driver_lock);
 520
 521                 if (priv->wakeup_dev_required) {
 522                         lbs_deb_thread("Waking up device...\n");
 523                         /* Wake up device */
 524                         if (priv->exit_deep_sleep(priv))
 525                                 lbs_deb_thread("Wakeup device failed\n");
 526                         continue;
 527                 }
 528
 529                 /* command timeout stuff */
 530                 if (priv->cmd_timed_out && priv->cur_cmd) {
 531                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 532
 533                         netdev_info(dev, "Timeout submitting command 0x%04x\n",
 534                                     le16_to_cpu(cmdnode->cmdbuf->command));
 535                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 536                         if (priv->reset_card)
 537                                 priv->reset_card(priv);
 538                 }
 539                 priv->cmd_timed_out = 0;
 540
 541                 if (!priv->fw_ready)
 542                         continue;
 543
 544                 /* Check if we need to confirm Sleep Request received previously */
 545                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 546                     !priv->dnld_sent && !priv->cur_cmd) {
 547                         if (priv->connect_status == LBS_CONNECTED) {
 548                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 549                                         "dnld_sent %d, cur_cmd %p\n",
 550                                         priv->currenttxskb, priv->dnld_sent,
 551                                         priv->cur_cmd);
 552
 553                                 lbs_ps_confirm_sleep(priv);
 554                         } else {
 555                                 /* workaround for firmware sending
 556                                  * deauth/linkloss event immediately
 557                                  * after sleep request; remove this
 558                                  * after firmware fixes it
 559                                  */
 560                                 priv->psstate = PS_STATE_AWAKE;
 561                                 netdev_alert(dev,
 562                                              "ignore PS_SleepConfirm in non-connected state\n");
 563                         }
 564                 }
 565
 566                 /* The PS state is changed during processing of Sleep Request
 567                  * event above
 568                  */
 569                 if ((priv->psstate == PS_STATE_SLEEP) ||
 570                     (priv->psstate == PS_STATE_PRE_SLEEP))
 571                         continue;
 572
 573                 if (priv->is_deep_sleep)
 574                         continue;
 575
 576                 /* Execute the next command */
 577                 if (!priv->dnld_sent && !priv->cur_cmd)
 578                         lbs_execute_next_command(priv);
 579
 580                 spin_lock_irq(&priv->driver_lock);
 581                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 582                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 583                                                         priv->tx_pending_buf,
 584                                                         priv->tx_pending_len);
 585                         if (ret) {
 586                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 587                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 588                         }
 589                         priv->tx_pending_len = 0;
 590                         if (!priv->currenttxskb) {
 591                                 /* We can wake the queues immediately if we aren't
 592                                    waiting for TX feedback */
 593                                 if (priv->connect_status == LBS_CONNECTED)
 594                                         netif_wake_queue(priv->dev);
 595                                 if (priv->mesh_dev &&
 596                                     netif_running(priv->mesh_dev))
 597                                         netif_wake_queue(priv->mesh_dev);
 598                         }
 599                 }
 600                 spin_unlock_irq(&priv->driver_lock);
 601         }
 602
 603         del_timer(&priv->command_timer);
 604         del_timer(&priv->auto_deepsleep_timer);
 605
 606         lbs_deb_leave(LBS_DEB_THREAD);
 607         return 0;
 608 }
 609
 610 /**
 611  * lbs_setup_firmware - gets the HW spec from the firmware and sets
 612  *        some basic parameters
 613  *
 614  *  @priv:      A pointer to &struct lbs_private structure
 615  *  returns:    0 or -1
 616  */
 617 static int lbs_setup_firmware(struct lbs_private *priv)
 618 {
 619         int ret = -1;
 620         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 621
 622         lbs_deb_enter(LBS_DEB_FW);
 623
 624         /* Read MAC address from firmware */
 625         memset(priv->current_addr, 0xff, ETH_ALEN);
 626         ret = lbs_update_hw_spec(priv);
 627         if (ret)
 628                 goto done;
 629
 630         /* Read power levels if available */
 631         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 632         if (ret == 0) {
 633                 priv->txpower_cur = curlevel;
 634                 priv->txpower_min = minlevel;
 635                 priv->txpower_max = maxlevel;
 636         }
 637
 638         /* Send cmd to FW to enable 11D function */
 639         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
 640
 641         lbs_set_mac_control(priv);
 642 done:
 643         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 644         return ret;
 645 }
 646
 647 int lbs_suspend(struct lbs_private *priv)
 648 {
 649         int ret;
 650
 651         lbs_deb_enter(LBS_DEB_FW);
 652
 653         if (priv->is_deep_sleep) {
 654                 ret = lbs_set_deep_sleep(priv, 0);
 655                 if (ret) {
 656                         netdev_err(priv->dev,
 657                                    "deep sleep cancellation failed: %d\n", ret);
 658                         return ret;
 659                 }
 660                 priv->deep_sleep_required = 1;
 661         }
 662
 663         ret = lbs_set_host_sleep(priv, 1);
 664
 665         netif_device_detach(priv->dev);
 666         if (priv->mesh_dev)
 667                 netif_device_detach(priv->mesh_dev);
 668
 669         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 670         return ret;
 671 }
 672 EXPORT_SYMBOL_GPL(lbs_suspend);
 673
 674 int lbs_resume(struct lbs_private *priv)
 675 {
 676         int ret;
 677
 678         lbs_deb_enter(LBS_DEB_FW);
 679
 680         ret = lbs_set_host_sleep(priv, 0);
 681
 682         netif_device_attach(priv->dev);
 683         if (priv->mesh_dev)
 684                 netif_device_attach(priv->mesh_dev);
 685
 686         if (priv->deep_sleep_required) {
 687                 priv->deep_sleep_required = 0;
 688                 ret = lbs_set_deep_sleep(priv, 1);
 689                 if (ret)
 690                         netdev_err(priv->dev,
 691                                    "deep sleep activation failed: %d\n", ret);
 692         }
 693
 694         if (priv->setup_fw_on_resume)
 695                 ret = lbs_setup_firmware(priv);
 696
 697         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 698         return ret;
 699 }
 700 EXPORT_SYMBOL_GPL(lbs_resume);
 701
 702 /**
 703  * lbs_cmd_timeout_handler - handles the timeout of command sending.
 704  * It will re-send the same command again.
 705  *
 706  * @data: &struct lbs_private pointer
 707  */
 708 static void lbs_cmd_timeout_handler(unsigned long data)
 709 {
 710         struct lbs_private *priv = (struct lbs_private *)data;
 711         unsigned long flags;
 712
 713         lbs_deb_enter(LBS_DEB_CMD);
 714         spin_lock_irqsave(&priv->driver_lock, flags);
 715
 716         if (!priv->cur_cmd)
 717                 goto out;
 718
 719         netdev_info(priv->dev, "command 0x%04x timed out\n",
 720                     le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 721
 722         priv->cmd_timed_out = 1;
 723
 724         /*
 725          * If the device didn't even acknowledge the command, reset the state
 726          * so that we don't block all future commands due to this one timeout.
 727          */
 728         if (priv->dnld_sent == DNLD_CMD_SENT)
 729                 priv->dnld_sent = DNLD_RES_RECEIVED;
 730
 731         wake_up(&priv->waitq);
 732 out:
 733         spin_unlock_irqrestore(&priv->driver_lock, flags);
 734         lbs_deb_leave(LBS_DEB_CMD);
 735 }
 736
 737 /**
 738  * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
 739  * timer expires and no activity (command, event, data etc.) is detected.
 740  * @data:       &struct lbs_private pointer
 741  * returns:     N/A
 742  */
 743 static void auto_deepsleep_timer_fn(unsigned long data)
 744 {
 745         struct lbs_private *priv = (struct lbs_private *)data;
 746
 747         lbs_deb_enter(LBS_DEB_CMD);
 748
 749         if (priv->is_activity_detected) {
 750                 priv->is_activity_detected = 0;
 751         } else {
 752                 if (priv->is_auto_deep_sleep_enabled &&
 753                     (!priv->wakeup_dev_required) &&
 754                     (priv->connect_status != LBS_CONNECTED)) {
 755                         struct cmd_header cmd;
 756
 757                         lbs_deb_main("Entering auto deep sleep mode...\n");
 758                         memset(&cmd, 0, sizeof(cmd));
 759                         cmd.size = cpu_to_le16(sizeof(cmd));
 760                         lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
 761                                         sizeof(cmd));
 762                 }
 763         }
 764         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 765                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 766         lbs_deb_leave(LBS_DEB_CMD);
 767 }
 768
 769 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 770 {
 771         lbs_deb_enter(LBS_DEB_SDIO);
 772
 773         priv->is_auto_deep_sleep_enabled = 1;
 774         if (priv->is_deep_sleep)
 775                 priv->wakeup_dev_required = 1;
 776         mod_timer(&priv->auto_deepsleep_timer ,
 777                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 778
 779         lbs_deb_leave(LBS_DEB_SDIO);
 780         return 0;
 781 }
 782
 783 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 784 {
 785         lbs_deb_enter(LBS_DEB_SDIO);
 786
 787         priv->is_auto_deep_sleep_enabled = 0;
 788         priv->auto_deep_sleep_timeout = 0;
 789         del_timer(&priv->auto_deepsleep_timer);
 790
 791         lbs_deb_leave(LBS_DEB_SDIO);
 792         return 0;
 793 }
 794
 795 static int lbs_init_adapter(struct lbs_private *priv)
 796 {
 797         int ret;
 798
 799         lbs_deb_enter(LBS_DEB_MAIN);
 800
 801         memset(priv->current_addr, 0xff, ETH_ALEN);
 802
 803         priv->connect_status = LBS_DISCONNECTED;
 804         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 805         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 806         priv->radio_on = 1;
 807         priv->psmode = LBS802_11POWERMODECAM;
 808         priv->psstate = PS_STATE_FULL_POWER;
 809         priv->is_deep_sleep = 0;
 810         priv->is_auto_deep_sleep_enabled = 0;
 811         priv->deep_sleep_required = 0;
 812         priv->wakeup_dev_required = 0;
 813         init_waitqueue_head(&priv->ds_awake_q);
 814         init_waitqueue_head(&priv->scan_q);
 815         priv->authtype_auto = 1;
 816         priv->is_host_sleep_configured = 0;
 817         priv->is_host_sleep_activated = 0;
 818         init_waitqueue_head(&priv->host_sleep_q);
 819         mutex_init(&priv->lock);
 820
 821         setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
 822                 (unsigned long)priv);
 823         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 824                         (unsigned long)priv);
 825
 826         INIT_LIST_HEAD(&priv->cmdfreeq);
 827         INIT_LIST_HEAD(&priv->cmdpendingq);
 828
 829         spin_lock_init(&priv->driver_lock);
 830
 831         /* Allocate the command buffers */
 832         if (lbs_allocate_cmd_buffer(priv)) {
 833                 pr_err("Out of memory allocating command buffers\n");
 834                 ret = -ENOMEM;
 835                 goto out;
 836         }
 837         priv->resp_idx = 0;
 838         priv->resp_len[0] = priv->resp_len[1] = 0;
 839
 840         /* Create the event FIFO */
 841         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 842         if (ret) {
 843                 pr_err("Out of memory allocating event FIFO buffer\n");
 844                 goto out;
 845         }
 846
 847 out:
 848         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 849
 850         return ret;
 851 }
 852
 853 static void lbs_free_adapter(struct lbs_private *priv)
 854 {
 855         lbs_deb_enter(LBS_DEB_MAIN);
 856
 857         lbs_free_cmd_buffer(priv);
 858         kfifo_free(&priv->event_fifo);
 859         del_timer(&priv->command_timer);
 860         del_timer(&priv->auto_deepsleep_timer);
 861
 862         lbs_deb_leave(LBS_DEB_MAIN);
 863 }
 864
 865 static const struct net_device_ops lbs_netdev_ops = {
 866         .ndo_open               = lbs_dev_open,
 867         .ndo_stop               = lbs_eth_stop,
 868         .ndo_start_xmit         = lbs_hard_start_xmit,
 869         .ndo_set_mac_address    = lbs_set_mac_address,
 870         .ndo_set_multicast_list = lbs_set_multicast_list,
 871         .ndo_change_mtu         = eth_change_mtu,
 872         .ndo_validate_addr      = eth_validate_addr,
 873 };
 874
 875 /**
 876  * lbs_add_card - adds the card. It will probe the
 877  * card, allocate the lbs_priv and initialize the device.
 878  *
 879  * @card:       A pointer to card
 880  * @dmdev:      A pointer to &struct device
 881  * returns:     A pointer to &struct lbs_private structure
 882  */
 883 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 884 {
 885         struct net_device *dev;
 886         struct wireless_dev *wdev;
 887         struct lbs_private *priv = NULL;
 888
 889         lbs_deb_enter(LBS_DEB_MAIN);
 890
 891         /* Allocate an Ethernet device and register it */
 892         wdev = lbs_cfg_alloc(dmdev);
 893         if (IS_ERR(wdev)) {
 894                 pr_err("cfg80211 init failed\n");
 895                 goto done;
 896         }
 897
 898         wdev->iftype = NL80211_IFTYPE_STATION;
 899         priv = wdev_priv(wdev);
 900         priv->wdev = wdev;
 901
 902         if (lbs_init_adapter(priv)) {
 903                 pr_err("failed to initialize adapter structure\n");
 904                 goto err_wdev;
 905         }
 906
 907         dev = alloc_netdev(0, "wlan%d", ether_setup);
 908         if (!dev) {
 909                 dev_err(dmdev, "no memory for network device instance\n");
 910                 goto err_adapter;
 911         }
 912
 913         dev->ieee80211_ptr = wdev;
 914         dev->ml_priv = priv;
 915         SET_NETDEV_DEV(dev, dmdev);
 916         wdev->netdev = dev;
 917         priv->dev = dev;
 918
 919         dev->netdev_ops = &lbs_netdev_ops;
 920         dev->watchdog_timeo = 5 * HZ;
 921         dev->ethtool_ops = &lbs_ethtool_ops;
 922         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 923
 924         priv->card = card;
 925
 926         strcpy(dev->name, "wlan%d");
 927
 928         lbs_deb_thread("Starting main thread...\n");
 929         init_waitqueue_head(&priv->waitq);
 930         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 931         if (IS_ERR(priv->main_thread)) {
 932                 lbs_deb_thread("Error creating main thread.\n");
 933                 goto err_ndev;
 934         }
 935
 936         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 937         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 938
 939         priv->wol_criteria = EHS_REMOVE_WAKEUP;
 940         priv->wol_gpio = 0xff;
 941         priv->wol_gap = 20;
 942         priv->ehs_remove_supported = true;
 943
 944         goto done;
 945
 946  err_ndev:
 947         free_netdev(dev);
 948
 949  err_adapter:
 950         lbs_free_adapter(priv);
 951
 952  err_wdev:
 953         lbs_cfg_free(priv);
 954
 955         priv = NULL;
 956
 957 done:
 958         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
 959         return priv;
 960 }
 961 EXPORT_SYMBOL_GPL(lbs_add_card);
 962
 963
 964 void lbs_remove_card(struct lbs_private *priv)
 965 {
 966         struct net_device *dev = priv->dev;
 967
 968         lbs_deb_enter(LBS_DEB_MAIN);
 969
 970         lbs_remove_mesh(priv);
 971         lbs_scan_deinit(priv);
 972
 973         /* worker thread destruction blocks on the in-flight command which
 974          * should have been cleared already in lbs_stop_card().
 975          */
 976         lbs_deb_main("destroying worker thread\n");
 977         destroy_workqueue(priv->work_thread);
 978         lbs_deb_main("done destroying worker thread\n");
 979
 980         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
 981                 priv->psmode = LBS802_11POWERMODECAM;
 982                 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
 983         }
 984
 985         if (priv->is_deep_sleep) {
 986                 priv->is_deep_sleep = 0;
 987                 wake_up_interruptible(&priv->ds_awake_q);
 988         }
 989
 990         priv->is_host_sleep_configured = 0;
 991         priv->is_host_sleep_activated = 0;
 992         wake_up_interruptible(&priv->host_sleep_q);
 993
 994         /* Stop the thread servicing the interrupts */
 995         priv->surpriseremoved = 1;
 996         kthread_stop(priv->main_thread);
 997
 998         lbs_free_adapter(priv);
 999         lbs_cfg_free(priv);
1000         free_netdev(dev);
1001
1002         lbs_deb_leave(LBS_DEB_MAIN);
1003 }
1004 EXPORT_SYMBOL_GPL(lbs_remove_card);
1005
1006
1007 int lbs_rtap_supported(struct lbs_private *priv)
1008 {
1009         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1010                 return 1;
1011
1012         /* newer firmware use a capability mask */
1013         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1014                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1015 }
1016
1017
1018 int lbs_start_card(struct lbs_private *priv)
1019 {
1020         struct net_device *dev = priv->dev;
1021         int ret = -1;
1022
1023         lbs_deb_enter(LBS_DEB_MAIN);
1024
1025         /* poke the firmware */
1026         ret = lbs_setup_firmware(priv);
1027         if (ret)
1028                 goto done;
1029
1030         if (!lbs_disablemesh)
1031                 lbs_init_mesh(priv);
1032         else
1033                 pr_info("%s: mesh disabled\n", dev->name);
1034
1035         if (lbs_cfg_register(priv)) {
1036                 pr_err("cannot register device\n");
1037                 goto done;
1038         }
1039
1040         if (lbs_mesh_activated(priv))
1041                 lbs_start_mesh(priv);
1042
1043         lbs_debugfs_init_one(priv, dev);
1044
1045         netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1046
1047         ret = 0;
1048
1049 done:
1050         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1051         return ret;
1052 }
1053 EXPORT_SYMBOL_GPL(lbs_start_card);
1054
1055
1056 void lbs_stop_card(struct lbs_private *priv)
1057 {
1058         struct net_device *dev;
1059
1060         lbs_deb_enter(LBS_DEB_MAIN);
1061
1062         if (!priv)
1063                 goto out;
1064         dev = priv->dev;
1065
1066         netif_stop_queue(dev);
1067         netif_carrier_off(dev);
1068
1069         lbs_debugfs_remove_one(priv);
1070         lbs_deinit_mesh(priv);
1071         unregister_netdev(dev);
1072
1073 out:
1074         lbs_deb_leave(LBS_DEB_MAIN);
1075 }
1076 EXPORT_SYMBOL_GPL(lbs_stop_card);
1077
1078
1079 void lbs_queue_event(struct lbs_private *priv, u32 event)
1080 {
1081         unsigned long flags;
1082
1083         lbs_deb_enter(LBS_DEB_THREAD);
1084         spin_lock_irqsave(&priv->driver_lock, flags);
1085
1086         if (priv->psstate == PS_STATE_SLEEP)
1087                 priv->psstate = PS_STATE_AWAKE;
1088
1089         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1090
1091         wake_up(&priv->waitq);
1092
1093         spin_unlock_irqrestore(&priv->driver_lock, flags);
1094         lbs_deb_leave(LBS_DEB_THREAD);
1095 }
1096 EXPORT_SYMBOL_GPL(lbs_queue_event);
1097
1098 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1099 {
1100         lbs_deb_enter(LBS_DEB_THREAD);
1101
1102         if (priv->psstate == PS_STATE_SLEEP)
1103                 priv->psstate = PS_STATE_AWAKE;
1104
1105         /* Swap buffers by flipping the response index */
1106         BUG_ON(resp_idx > 1);
1107         priv->resp_idx = resp_idx;
1108
1109         wake_up(&priv->waitq);
1110
1111         lbs_deb_leave(LBS_DEB_THREAD);
1112 }
1113 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1114
1115 /**
1116  *  lbs_get_firmware - Retrieves two-stage firmware
1117  *
1118  *  @dev:       A pointer to &device structure
1119  *  @user_helper: User-defined helper firmware file
1120  *  @user_mainfw: User-defined main firmware file
1121  *  @card_model: Bus-specific card model ID used to filter firmware table
1122  *              elements
1123  *  @fw_table:  Table of firmware file names and device model numbers
1124  *              terminated by an entry with a NULL helper name
1125  *  @helper:    On success, the helper firmware; caller must free
1126  *  @mainfw:    On success, the main firmware; caller must free
1127  *
1128  *  returns:            0 on success, non-zero on failure
1129  */
1130 int lbs_get_firmware(struct device *dev, const char *user_helper,
1131                         const char *user_mainfw, u32 card_model,
1132                         const struct lbs_fw_table *fw_table,
1133                         const struct firmware **helper,
1134                         const struct firmware **mainfw)
1135 {
1136         const struct lbs_fw_table *iter;
1137         int ret;
1138
1139         BUG_ON(helper == NULL);
1140         BUG_ON(mainfw == NULL);
1141
1142         /* Try user-specified firmware first */
1143         if (user_helper) {
1144                 ret = request_firmware(helper, user_helper, dev);
1145                 if (ret) {
1146                         dev_err(dev, "couldn't find helper firmware %s\n",
1147                                 user_helper);
1148                         goto fail;
1149                 }
1150         }
1151         if (user_mainfw) {
1152                 ret = request_firmware(mainfw, user_mainfw, dev);
1153                 if (ret) {
1154                         dev_err(dev, "couldn't find main firmware %s\n",
1155                                 user_mainfw);
1156                         goto fail;
1157                 }
1158         }
1159
1160         if (*helper && *mainfw)
1161                 return 0;
1162
1163         /* Otherwise search for firmware to use.  If neither the helper or
1164          * the main firmware were specified by the user, then we need to
1165          * make sure that found helper & main are from the same entry in
1166          * fw_table.
1167          */
1168         iter = fw_table;
1169         while (iter && iter->helper) {
1170                 if (iter->model != card_model)
1171                         goto next;
1172
1173                 if (*helper == NULL) {
1174                         ret = request_firmware(helper, iter->helper, dev);
1175                         if (ret)
1176                                 goto next;
1177
1178                         /* If the device has one-stage firmware (ie cf8305) and
1179                          * we've got it then we don't need to bother with the
1180                          * main firmware.
1181                          */
1182                         if (iter->fwname == NULL)
1183                                 return 0;
1184                 }
1185
1186                 if (*mainfw == NULL) {
1187                         ret = request_firmware(mainfw, iter->fwname, dev);
1188                         if (ret && !user_helper) {
1189                                 /* Clear the helper if it wasn't user-specified
1190                                  * and the main firmware load failed, to ensure
1191                                  * we don't have mismatched firmware pairs.
1192                                  */
1193                                 release_firmware(*helper);
1194                                 *helper = NULL;
1195                         }
1196                 }
1197
1198                 if (*helper && *mainfw)
1199                         return 0;
1200
1201   next:
1202                 iter++;
1203         }
1204
1205   fail:
1206         /* Failed */
1207         if (*helper) {
1208                 release_firmware(*helper);
1209                 *helper = NULL;
1210         }
1211         if (*mainfw) {
1212                 release_firmware(*mainfw);
1213                 *mainfw = NULL;
1214         }
1215
1216         return -ENOENT;
1217 }
1218 EXPORT_SYMBOL_GPL(lbs_get_firmware);
1219
1220 static int __init lbs_init_module(void)
1221 {
1222         lbs_deb_enter(LBS_DEB_MAIN);
1223         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1224         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1225         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1226         confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1227         lbs_debugfs_init();
1228         lbs_deb_leave(LBS_DEB_MAIN);
1229         return 0;
1230 }
1231
1232 static void __exit lbs_exit_module(void)
1233 {
1234         lbs_deb_enter(LBS_DEB_MAIN);
1235         lbs_debugfs_remove();
1236         lbs_deb_leave(LBS_DEB_MAIN);
1237 }
1238
1239 module_init(lbs_init_module);
1240 module_exit(lbs_exit_module);
1241
1242 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1243 MODULE_AUTHOR("Marvell International Ltd.");
1244 MODULE_LICENSE("GPL");