Pileus Git - ~andy/linux/blob - drivers/net/wireless/libertas/main.c

   1 /**
   2   * This file contains the major functions in WLAN
   3   * driver. It includes init, exit, open, close and main
   4   * thread etc..
   5   */
   6
   7 #include <linux/moduleparam.h>
   8 #include <linux/delay.h>
   9 #include <linux/etherdevice.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/if_arp.h>
  12 #include <linux/kthread.h>
  13 #include <linux/kfifo.h>
  14 #include <linux/slab.h>
  15 #include <net/cfg80211.h>
  16
  17 #include "host.h"
  18 #include "decl.h"
  19 #include "dev.h"
  20 #include "cfg.h"
  21 #include "debugfs.h"
  22 #include "cmd.h"
  23
  24 #define DRIVER_RELEASE_VERSION "323.p0"
  25 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  26 #ifdef  DEBUG
  27     "-dbg"
  28 #endif
  29     "";
  30
  31
  32 /* Module parameters */
  33 unsigned int lbs_debug;
  34 EXPORT_SYMBOL_GPL(lbs_debug);
  35 module_param_named(libertas_debug, lbs_debug, int, 0644);
  36
  37
  38 /* This global structure is used to send the confirm_sleep command as
  39  * fast as possible down to the firmware. */
  40 struct cmd_confirm_sleep confirm_sleep;
  41
  42
  43 /**
  44  * the table to keep region code
  45  */
  46 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
  47     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
  48
  49 /**
  50  * FW rate table.  FW refers to rates by their index in this table, not by the
  51  * rate value itself.  Values of 0x00 are
  52  * reserved positions.
  53  */
  54 static u8 fw_data_rates[MAX_RATES] =
  55     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
  56       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
  57 };
  58
  59 /**
  60  *  @brief use index to get the data rate
  61  *
  62  *  @param idx                The index of data rate
  63  *  @return                     data rate or 0
  64  */
  65 u32 lbs_fw_index_to_data_rate(u8 idx)
  66 {
  67         if (idx >= sizeof(fw_data_rates))
  68                 idx = 0;
  69         return fw_data_rates[idx];
  70 }
  71
  72 /**
  73  *  @brief use rate to get the index
  74  *
  75  *  @param rate                 data rate
  76  *  @return                     index or 0
  77  */
  78 u8 lbs_data_rate_to_fw_index(u32 rate)
  79 {
  80         u8 i;
  81
  82         if (!rate)
  83                 return 0;
  84
  85         for (i = 0; i < sizeof(fw_data_rates); i++) {
  86                 if (rate == fw_data_rates[i])
  87                         return i;
  88         }
  89         return 0;
  90 }
  91
  92
  93 /**
  94  *  @brief This function opens the ethX interface
  95  *
  96  *  @param dev     A pointer to net_device structure
  97  *  @return        0 or -EBUSY if monitor mode active
  98  */
  99 static int lbs_dev_open(struct net_device *dev)
 100 {
 101         struct lbs_private *priv = dev->ml_priv;
 102         int ret = 0;
 103
 104         lbs_deb_enter(LBS_DEB_NET);
 105
 106         spin_lock_irq(&priv->driver_lock);
 107
 108         if (priv->connect_status == LBS_CONNECTED)
 109                 netif_carrier_on(dev);
 110         else
 111                 netif_carrier_off(dev);
 112
 113         if (!priv->tx_pending_len)
 114                 netif_wake_queue(dev);
 115
 116         spin_unlock_irq(&priv->driver_lock);
 117         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 118         return ret;
 119 }
 120
 121 /**
 122  *  @brief This function closes the ethX interface
 123  *
 124  *  @param dev     A pointer to net_device structure
 125  *  @return        0
 126  */
 127 static int lbs_eth_stop(struct net_device *dev)
 128 {
 129         struct lbs_private *priv = dev->ml_priv;
 130
 131         lbs_deb_enter(LBS_DEB_NET);
 132
 133         spin_lock_irq(&priv->driver_lock);
 134         netif_stop_queue(dev);
 135         spin_unlock_irq(&priv->driver_lock);
 136
 137         schedule_work(&priv->mcast_work);
 138
 139         lbs_deb_leave(LBS_DEB_NET);
 140         return 0;
 141 }
 142
 143 static void lbs_tx_timeout(struct net_device *dev)
 144 {
 145         struct lbs_private *priv = dev->ml_priv;
 146
 147         lbs_deb_enter(LBS_DEB_TX);
 148
 149         lbs_pr_err("tx watch dog timeout\n");
 150
 151         dev->trans_start = jiffies; /* prevent tx timeout */
 152
 153         if (priv->currenttxskb)
 154                 lbs_send_tx_feedback(priv, 0);
 155
 156         /* XX: Shouldn't we also call into the hw-specific driver
 157            to kick it somehow? */
 158         lbs_host_to_card_done(priv);
 159
 160         /* More often than not, this actually happens because the
 161            firmware has crapped itself -- rather than just a very
 162            busy medium. So send a harmless command, and if/when
 163            _that_ times out, we'll kick it in the head. */
 164         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
 165                                      0, 0, NULL);
 166
 167         lbs_deb_leave(LBS_DEB_TX);
 168 }
 169
 170 void lbs_host_to_card_done(struct lbs_private *priv)
 171 {
 172         unsigned long flags;
 173
 174         lbs_deb_enter(LBS_DEB_THREAD);
 175
 176         spin_lock_irqsave(&priv->driver_lock, flags);
 177
 178         priv->dnld_sent = DNLD_RES_RECEIVED;
 179
 180         /* Wake main thread if commands are pending */
 181         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 182                 if (!priv->wakeup_dev_required)
 183                         wake_up_interruptible(&priv->waitq);
 184         }
 185
 186         spin_unlock_irqrestore(&priv->driver_lock, flags);
 187         lbs_deb_leave(LBS_DEB_THREAD);
 188 }
 189 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 190
 191 int lbs_set_mac_address(struct net_device *dev, void *addr)
 192 {
 193         int ret = 0;
 194         struct lbs_private *priv = dev->ml_priv;
 195         struct sockaddr *phwaddr = addr;
 196         struct cmd_ds_802_11_mac_address cmd;
 197
 198         lbs_deb_enter(LBS_DEB_NET);
 199
 200         /* In case it was called from the mesh device */
 201         dev = priv->dev;
 202
 203         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 204         cmd.action = cpu_to_le16(CMD_ACT_SET);
 205         memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
 206
 207         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 208         if (ret) {
 209                 lbs_deb_net("set MAC address failed\n");
 210                 goto done;
 211         }
 212
 213         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 214         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 215         if (priv->mesh_dev)
 216                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 217
 218 done:
 219         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 220         return ret;
 221 }
 222
 223
 224 static inline int mac_in_list(unsigned char *list, int list_len,
 225                               unsigned char *mac)
 226 {
 227         while (list_len) {
 228                 if (!memcmp(list, mac, ETH_ALEN))
 229                         return 1;
 230                 list += ETH_ALEN;
 231                 list_len--;
 232         }
 233         return 0;
 234 }
 235
 236
 237 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 238                                struct net_device *dev, int nr_addrs)
 239 {
 240         int i = nr_addrs;
 241         struct netdev_hw_addr *ha;
 242         int cnt;
 243
 244         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 245                 return nr_addrs;
 246
 247         netif_addr_lock_bh(dev);
 248         cnt = netdev_mc_count(dev);
 249         netdev_for_each_mc_addr(ha, dev) {
 250                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 251                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 252                                     ha->addr);
 253                         cnt--;
 254                         continue;
 255                 }
 256
 257                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 258                         break;
 259                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 260                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 261                             ha->addr);
 262                 i++;
 263                 cnt--;
 264         }
 265         netif_addr_unlock_bh(dev);
 266         if (cnt)
 267                 return -EOVERFLOW;
 268
 269         return i;
 270 }
 271
 272 static void lbs_set_mcast_worker(struct work_struct *work)
 273 {
 274         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 275         struct cmd_ds_mac_multicast_adr mcast_cmd;
 276         int dev_flags;
 277         int nr_addrs;
 278         int old_mac_control = priv->mac_control;
 279
 280         lbs_deb_enter(LBS_DEB_NET);
 281
 282         dev_flags = priv->dev->flags;
 283         if (priv->mesh_dev)
 284                 dev_flags |= priv->mesh_dev->flags;
 285
 286         if (dev_flags & IFF_PROMISC) {
 287                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 288                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 289                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 290                 goto out_set_mac_control;
 291         } else if (dev_flags & IFF_ALLMULTI) {
 292         do_allmulti:
 293                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 294                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 295                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 296                 goto out_set_mac_control;
 297         }
 298
 299         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 300         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 301         if (nr_addrs >= 0 && priv->mesh_dev)
 302                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 303         if (nr_addrs < 0)
 304                 goto do_allmulti;
 305
 306         if (nr_addrs) {
 307                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 308                                     maclist[6*nr_addrs]);
 309
 310                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 311                 mcast_cmd.hdr.size = cpu_to_le16(size);
 312                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 313
 314                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 315
 316                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 317         } else
 318                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 319
 320         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 321                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 322  out_set_mac_control:
 323         if (priv->mac_control != old_mac_control)
 324                 lbs_set_mac_control(priv);
 325
 326         lbs_deb_leave(LBS_DEB_NET);
 327 }
 328
 329 void lbs_set_multicast_list(struct net_device *dev)
 330 {
 331         struct lbs_private *priv = dev->ml_priv;
 332
 333         schedule_work(&priv->mcast_work);
 334 }
 335
 336 /**
 337  *  @brief This function handles the major jobs in the LBS driver.
 338  *  It handles all events generated by firmware, RX data received
 339  *  from firmware and TX data sent from kernel.
 340  *
 341  *  @param data    A pointer to lbs_thread structure
 342  *  @return        0
 343  */
 344 static int lbs_thread(void *data)
 345 {
 346         struct net_device *dev = data;
 347         struct lbs_private *priv = dev->ml_priv;
 348         wait_queue_t wait;
 349
 350         lbs_deb_enter(LBS_DEB_THREAD);
 351
 352         init_waitqueue_entry(&wait, current);
 353
 354         for (;;) {
 355                 int shouldsleep;
 356                 u8 resp_idx;
 357
 358                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 359                                 priv->currenttxskb, priv->dnld_sent);
 360
 361                 add_wait_queue(&priv->waitq, &wait);
 362                 set_current_state(TASK_INTERRUPTIBLE);
 363                 spin_lock_irq(&priv->driver_lock);
 364
 365                 if (kthread_should_stop())
 366                         shouldsleep = 0;        /* Bye */
 367                 else if (priv->surpriseremoved)
 368                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 369                 else if (priv->psstate == PS_STATE_SLEEP)
 370                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 371                 else if (priv->cmd_timed_out)
 372                         shouldsleep = 0;        /* Command timed out. Recover */
 373                 else if (!priv->fw_ready)
 374                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 375                 else if (priv->dnld_sent)
 376                         shouldsleep = 1;        /* Something is en route to the device already */
 377                 else if (priv->tx_pending_len > 0)
 378                         shouldsleep = 0;        /* We've a packet to send */
 379                 else if (priv->resp_len[priv->resp_idx])
 380                         shouldsleep = 0;        /* We have a command response */
 381                 else if (priv->cur_cmd)
 382                         shouldsleep = 1;        /* Can't send a command; one already running */
 383                 else if (!list_empty(&priv->cmdpendingq) &&
 384                                         !(priv->wakeup_dev_required))
 385                         shouldsleep = 0;        /* We have a command to send */
 386                 else if (kfifo_len(&priv->event_fifo))
 387                         shouldsleep = 0;        /* We have an event to process */
 388                 else
 389                         shouldsleep = 1;        /* No command */
 390
 391                 if (shouldsleep) {
 392                         lbs_deb_thread("sleeping, connect_status %d, "
 393                                 "psmode %d, psstate %d\n",
 394                                 priv->connect_status,
 395                                 priv->psmode, priv->psstate);
 396                         spin_unlock_irq(&priv->driver_lock);
 397                         schedule();
 398                 } else
 399                         spin_unlock_irq(&priv->driver_lock);
 400
 401                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 402                                priv->currenttxskb, priv->dnld_sent);
 403
 404                 set_current_state(TASK_RUNNING);
 405                 remove_wait_queue(&priv->waitq, &wait);
 406
 407                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 408                                priv->currenttxskb, priv->dnld_sent);
 409
 410                 if (kthread_should_stop()) {
 411                         lbs_deb_thread("break from main thread\n");
 412                         break;
 413                 }
 414
 415                 if (priv->surpriseremoved) {
 416                         lbs_deb_thread("adapter removed; waiting to die...\n");
 417                         continue;
 418                 }
 419
 420                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 421                        priv->currenttxskb, priv->dnld_sent);
 422
 423                 /* Process any pending command response */
 424                 spin_lock_irq(&priv->driver_lock);
 425                 resp_idx = priv->resp_idx;
 426                 if (priv->resp_len[resp_idx]) {
 427                         spin_unlock_irq(&priv->driver_lock);
 428                         lbs_process_command_response(priv,
 429                                 priv->resp_buf[resp_idx],
 430                                 priv->resp_len[resp_idx]);
 431                         spin_lock_irq(&priv->driver_lock);
 432                         priv->resp_len[resp_idx] = 0;
 433                 }
 434                 spin_unlock_irq(&priv->driver_lock);
 435
 436                 /* Process hardware events, e.g. card removed, link lost */
 437                 spin_lock_irq(&priv->driver_lock);
 438                 while (kfifo_len(&priv->event_fifo)) {
 439                         u32 event;
 440
 441                         if (kfifo_out(&priv->event_fifo,
 442                                 (unsigned char *) &event, sizeof(event)) !=
 443                                 sizeof(event))
 444                                         break;
 445                         spin_unlock_irq(&priv->driver_lock);
 446                         lbs_process_event(priv, event);
 447                         spin_lock_irq(&priv->driver_lock);
 448                 }
 449                 spin_unlock_irq(&priv->driver_lock);
 450
 451                 if (priv->wakeup_dev_required) {
 452                         lbs_deb_thread("Waking up device...\n");
 453                         /* Wake up device */
 454                         if (priv->exit_deep_sleep(priv))
 455                                 lbs_deb_thread("Wakeup device failed\n");
 456                         continue;
 457                 }
 458
 459                 /* command timeout stuff */
 460                 if (priv->cmd_timed_out && priv->cur_cmd) {
 461                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 462
 463                         lbs_pr_info("Timeout submitting command 0x%04x\n",
 464                                 le16_to_cpu(cmdnode->cmdbuf->command));
 465                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 466                         if (priv->reset_card)
 467                                 priv->reset_card(priv);
 468                 }
 469                 priv->cmd_timed_out = 0;
 470
 471                 if (!priv->fw_ready)
 472                         continue;
 473
 474                 /* Check if we need to confirm Sleep Request received previously */
 475                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 476                     !priv->dnld_sent && !priv->cur_cmd) {
 477                         if (priv->connect_status == LBS_CONNECTED) {
 478                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 479                                         "dnld_sent %d, cur_cmd %p\n",
 480                                         priv->currenttxskb, priv->dnld_sent,
 481                                         priv->cur_cmd);
 482
 483                                 lbs_ps_confirm_sleep(priv);
 484                         } else {
 485                                 /* workaround for firmware sending
 486                                  * deauth/linkloss event immediately
 487                                  * after sleep request; remove this
 488                                  * after firmware fixes it
 489                                  */
 490                                 priv->psstate = PS_STATE_AWAKE;
 491                                 lbs_pr_alert("ignore PS_SleepConfirm in "
 492                                         "non-connected state\n");
 493                         }
 494                 }
 495
 496                 /* The PS state is changed during processing of Sleep Request
 497                  * event above
 498                  */
 499                 if ((priv->psstate == PS_STATE_SLEEP) ||
 500                     (priv->psstate == PS_STATE_PRE_SLEEP))
 501                         continue;
 502
 503                 if (priv->is_deep_sleep)
 504                         continue;
 505
 506                 /* Execute the next command */
 507                 if (!priv->dnld_sent && !priv->cur_cmd)
 508                         lbs_execute_next_command(priv);
 509
 510                 /* Wake-up command waiters which can't sleep in
 511                  * lbs_prepare_and_send_command
 512                  */
 513                 if (!list_empty(&priv->cmdpendingq))
 514                         wake_up_all(&priv->cmd_pending);
 515
 516                 spin_lock_irq(&priv->driver_lock);
 517                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 518                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 519                                                         priv->tx_pending_buf,
 520                                                         priv->tx_pending_len);
 521                         if (ret) {
 522                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 523                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 524                         }
 525                         priv->tx_pending_len = 0;
 526                         if (!priv->currenttxskb) {
 527                                 /* We can wake the queues immediately if we aren't
 528                                    waiting for TX feedback */
 529                                 if (priv->connect_status == LBS_CONNECTED)
 530                                         netif_wake_queue(priv->dev);
 531                                 if (priv->mesh_dev &&
 532                                     lbs_mesh_connected(priv))
 533                                         netif_wake_queue(priv->mesh_dev);
 534                         }
 535                 }
 536                 spin_unlock_irq(&priv->driver_lock);
 537         }
 538
 539         del_timer(&priv->command_timer);
 540         del_timer(&priv->auto_deepsleep_timer);
 541         wake_up_all(&priv->cmd_pending);
 542
 543         lbs_deb_leave(LBS_DEB_THREAD);
 544         return 0;
 545 }
 546
 547 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 548                 unsigned long dummy,
 549                 struct cmd_header *cmd)
 550 {
 551         lbs_deb_enter(LBS_DEB_FW);
 552         priv->is_host_sleep_activated = 1;
 553         wake_up_interruptible(&priv->host_sleep_q);
 554         lbs_deb_leave(LBS_DEB_FW);
 555         return 0;
 556 }
 557
 558 int lbs_suspend(struct lbs_private *priv)
 559 {
 560         struct cmd_header cmd;
 561         int ret;
 562
 563         lbs_deb_enter(LBS_DEB_FW);
 564
 565         if (priv->is_deep_sleep) {
 566                 ret = lbs_set_deep_sleep(priv, 0);
 567                 if (ret) {
 568                         lbs_pr_err("deep sleep cancellation failed: %d\n", ret);
 569                         return ret;
 570                 }
 571                 priv->deep_sleep_required = 1;
 572         }
 573
 574         memset(&cmd, 0, sizeof(cmd));
 575         ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 576                                                 (struct wol_config *)NULL);
 577         if (ret) {
 578                 lbs_pr_info("Host sleep configuration failed: %d\n", ret);
 579                 return ret;
 580         }
 581         if (priv->psstate == PS_STATE_FULL_POWER) {
 582                 ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
 583                                 sizeof(cmd), lbs_ret_host_sleep_activate, 0);
 584                 if (ret)
 585                         lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
 586         }
 587
 588         if (!wait_event_interruptible_timeout(priv->host_sleep_q,
 589                                 priv->is_host_sleep_activated, (10 * HZ))) {
 590                 lbs_pr_err("host_sleep_q: timer expired\n");
 591                 ret = -1;
 592         }
 593         netif_device_detach(priv->dev);
 594         if (priv->mesh_dev)
 595                 netif_device_detach(priv->mesh_dev);
 596
 597         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 598         return ret;
 599 }
 600 EXPORT_SYMBOL_GPL(lbs_suspend);
 601
 602 int lbs_resume(struct lbs_private *priv)
 603 {
 604         int ret;
 605         uint32_t criteria = EHS_REMOVE_WAKEUP;
 606
 607         lbs_deb_enter(LBS_DEB_FW);
 608
 609         ret = lbs_host_sleep_cfg(priv, criteria, (struct wol_config *)NULL);
 610
 611         netif_device_attach(priv->dev);
 612         if (priv->mesh_dev)
 613                 netif_device_attach(priv->mesh_dev);
 614
 615         if (priv->deep_sleep_required) {
 616                 priv->deep_sleep_required = 0;
 617                 ret = lbs_set_deep_sleep(priv, 1);
 618                 if (ret)
 619                         lbs_pr_err("deep sleep activation failed: %d\n", ret);
 620         }
 621
 622         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 623         return ret;
 624 }
 625 EXPORT_SYMBOL_GPL(lbs_resume);
 626
 627 /**
 628  * @brief This function gets the HW spec from the firmware and sets
 629  *        some basic parameters.
 630  *
 631  *  @param priv    A pointer to struct lbs_private structure
 632  *  @return        0 or -1
 633  */
 634 static int lbs_setup_firmware(struct lbs_private *priv)
 635 {
 636         int ret = -1;
 637         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 638
 639         lbs_deb_enter(LBS_DEB_FW);
 640
 641         /* Read MAC address from firmware */
 642         memset(priv->current_addr, 0xff, ETH_ALEN);
 643         ret = lbs_update_hw_spec(priv);
 644         if (ret)
 645                 goto done;
 646
 647         /* Read power levels if available */
 648         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 649         if (ret == 0) {
 650                 priv->txpower_cur = curlevel;
 651                 priv->txpower_min = minlevel;
 652                 priv->txpower_max = maxlevel;
 653         }
 654
 655         lbs_set_mac_control(priv);
 656 done:
 657         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 658         return ret;
 659 }
 660
 661 /**
 662  *  This function handles the timeout of command sending.
 663  *  It will re-send the same command again.
 664  */
 665 static void lbs_cmd_timeout_handler(unsigned long data)
 666 {
 667         struct lbs_private *priv = (struct lbs_private *)data;
 668         unsigned long flags;
 669
 670         lbs_deb_enter(LBS_DEB_CMD);
 671         spin_lock_irqsave(&priv->driver_lock, flags);
 672
 673         if (!priv->cur_cmd)
 674                 goto out;
 675
 676         lbs_pr_info("command 0x%04x timed out\n",
 677                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 678
 679         priv->cmd_timed_out = 1;
 680         wake_up_interruptible(&priv->waitq);
 681 out:
 682         spin_unlock_irqrestore(&priv->driver_lock, flags);
 683         lbs_deb_leave(LBS_DEB_CMD);
 684 }
 685
 686 /**
 687  *  This function put the device back to deep sleep mode when timer expires
 688  *  and no activity (command, event, data etc.) is detected.
 689  */
 690 static void auto_deepsleep_timer_fn(unsigned long data)
 691 {
 692         struct lbs_private *priv = (struct lbs_private *)data;
 693         int ret;
 694
 695         lbs_deb_enter(LBS_DEB_CMD);
 696
 697         if (priv->is_activity_detected) {
 698                 priv->is_activity_detected = 0;
 699         } else {
 700                 if (priv->is_auto_deep_sleep_enabled &&
 701                                 (!priv->wakeup_dev_required) &&
 702                                 (priv->connect_status != LBS_CONNECTED)) {
 703                         lbs_deb_main("Entering auto deep sleep mode...\n");
 704                         ret = lbs_prepare_and_send_command(priv,
 705                                         CMD_802_11_DEEP_SLEEP, 0,
 706                                         0, 0, NULL);
 707                         if (ret)
 708                                 lbs_pr_err("Enter Deep Sleep command failed\n");
 709                 }
 710         }
 711         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 712                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 713         lbs_deb_leave(LBS_DEB_CMD);
 714 }
 715
 716 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 717 {
 718         lbs_deb_enter(LBS_DEB_SDIO);
 719
 720         priv->is_auto_deep_sleep_enabled = 1;
 721         if (priv->is_deep_sleep)
 722                 priv->wakeup_dev_required = 1;
 723         mod_timer(&priv->auto_deepsleep_timer ,
 724                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 725
 726         lbs_deb_leave(LBS_DEB_SDIO);
 727         return 0;
 728 }
 729
 730 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 731 {
 732         lbs_deb_enter(LBS_DEB_SDIO);
 733
 734         priv->is_auto_deep_sleep_enabled = 0;
 735         priv->auto_deep_sleep_timeout = 0;
 736         del_timer(&priv->auto_deepsleep_timer);
 737
 738         lbs_deb_leave(LBS_DEB_SDIO);
 739         return 0;
 740 }
 741
 742 static int lbs_init_adapter(struct lbs_private *priv)
 743 {
 744         int ret;
 745
 746         lbs_deb_enter(LBS_DEB_MAIN);
 747
 748         memset(priv->current_addr, 0xff, ETH_ALEN);
 749
 750         priv->connect_status = LBS_DISCONNECTED;
 751         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 752         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 753         priv->radio_on = 1;
 754         priv->psmode = LBS802_11POWERMODECAM;
 755         priv->psstate = PS_STATE_FULL_POWER;
 756         priv->is_deep_sleep = 0;
 757         priv->is_auto_deep_sleep_enabled = 0;
 758         priv->deep_sleep_required = 0;
 759         priv->wakeup_dev_required = 0;
 760         init_waitqueue_head(&priv->ds_awake_q);
 761         priv->authtype_auto = 1;
 762         priv->is_host_sleep_configured = 0;
 763         priv->is_host_sleep_activated = 0;
 764         init_waitqueue_head(&priv->host_sleep_q);
 765         mutex_init(&priv->lock);
 766
 767         setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
 768                 (unsigned long)priv);
 769         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 770                         (unsigned long)priv);
 771
 772         INIT_LIST_HEAD(&priv->cmdfreeq);
 773         INIT_LIST_HEAD(&priv->cmdpendingq);
 774
 775         spin_lock_init(&priv->driver_lock);
 776         init_waitqueue_head(&priv->cmd_pending);
 777
 778         /* Allocate the command buffers */
 779         if (lbs_allocate_cmd_buffer(priv)) {
 780                 lbs_pr_err("Out of memory allocating command buffers\n");
 781                 ret = -ENOMEM;
 782                 goto out;
 783         }
 784         priv->resp_idx = 0;
 785         priv->resp_len[0] = priv->resp_len[1] = 0;
 786
 787         /* Create the event FIFO */
 788         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 789         if (ret) {
 790                 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
 791                 goto out;
 792         }
 793
 794 out:
 795         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 796
 797         return ret;
 798 }
 799
 800 static void lbs_free_adapter(struct lbs_private *priv)
 801 {
 802         lbs_deb_enter(LBS_DEB_MAIN);
 803
 804         lbs_free_cmd_buffer(priv);
 805         kfifo_free(&priv->event_fifo);
 806         del_timer(&priv->command_timer);
 807         del_timer(&priv->auto_deepsleep_timer);
 808
 809         lbs_deb_leave(LBS_DEB_MAIN);
 810 }
 811
 812 static const struct net_device_ops lbs_netdev_ops = {
 813         .ndo_open               = lbs_dev_open,
 814         .ndo_stop               = lbs_eth_stop,
 815         .ndo_start_xmit         = lbs_hard_start_xmit,
 816         .ndo_set_mac_address    = lbs_set_mac_address,
 817         .ndo_tx_timeout         = lbs_tx_timeout,
 818         .ndo_set_multicast_list = lbs_set_multicast_list,
 819         .ndo_change_mtu         = eth_change_mtu,
 820         .ndo_validate_addr      = eth_validate_addr,
 821 };
 822
 823 /**
 824  * @brief This function adds the card. it will probe the
 825  * card, allocate the lbs_priv and initialize the device.
 826  *
 827  *  @param card    A pointer to card
 828  *  @return        A pointer to struct lbs_private structure
 829  */
 830 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 831 {
 832         struct net_device *dev;
 833         struct wireless_dev *wdev;
 834         struct lbs_private *priv = NULL;
 835
 836         lbs_deb_enter(LBS_DEB_MAIN);
 837
 838         /* Allocate an Ethernet device and register it */
 839         wdev = lbs_cfg_alloc(dmdev);
 840         if (IS_ERR(wdev)) {
 841                 lbs_pr_err("cfg80211 init failed\n");
 842                 goto done;
 843         }
 844
 845         wdev->iftype = NL80211_IFTYPE_STATION;
 846         priv = wdev_priv(wdev);
 847         priv->wdev = wdev;
 848
 849         if (lbs_init_adapter(priv)) {
 850                 lbs_pr_err("failed to initialize adapter structure.\n");
 851                 goto err_wdev;
 852         }
 853
 854         dev = alloc_netdev(0, "wlan%d", ether_setup);
 855         if (!dev) {
 856                 dev_err(dmdev, "no memory for network device instance\n");
 857                 goto err_adapter;
 858         }
 859
 860         dev->ieee80211_ptr = wdev;
 861         dev->ml_priv = priv;
 862         SET_NETDEV_DEV(dev, dmdev);
 863         wdev->netdev = dev;
 864         priv->dev = dev;
 865
 866         dev->netdev_ops = &lbs_netdev_ops;
 867         dev->watchdog_timeo = 5 * HZ;
 868         dev->ethtool_ops = &lbs_ethtool_ops;
 869         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 870
 871         priv->card = card;
 872
 873         strcpy(dev->name, "wlan%d");
 874
 875         lbs_deb_thread("Starting main thread...\n");
 876         init_waitqueue_head(&priv->waitq);
 877         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 878         if (IS_ERR(priv->main_thread)) {
 879                 lbs_deb_thread("Error creating main thread.\n");
 880                 goto err_ndev;
 881         }
 882
 883         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 884         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 885
 886         priv->wol_criteria = 0xffffffff;
 887         priv->wol_gpio = 0xff;
 888         priv->wol_gap = 20;
 889
 890         goto done;
 891
 892  err_ndev:
 893         free_netdev(dev);
 894
 895  err_adapter:
 896         lbs_free_adapter(priv);
 897
 898  err_wdev:
 899         lbs_cfg_free(priv);
 900
 901         priv = NULL;
 902
 903 done:
 904         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
 905         return priv;
 906 }
 907 EXPORT_SYMBOL_GPL(lbs_add_card);
 908
 909
 910 void lbs_remove_card(struct lbs_private *priv)
 911 {
 912         struct net_device *dev = priv->dev;
 913
 914         lbs_deb_enter(LBS_DEB_MAIN);
 915
 916         lbs_remove_mesh(priv);
 917         lbs_scan_deinit(priv);
 918
 919         dev = priv->dev;
 920
 921         cancel_work_sync(&priv->mcast_work);
 922
 923         /* worker thread destruction blocks on the in-flight command which
 924          * should have been cleared already in lbs_stop_card().
 925          */
 926         lbs_deb_main("destroying worker thread\n");
 927         destroy_workqueue(priv->work_thread);
 928         lbs_deb_main("done destroying worker thread\n");
 929
 930         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
 931                 priv->psmode = LBS802_11POWERMODECAM;
 932                 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
 933         }
 934
 935         if (priv->is_deep_sleep) {
 936                 priv->is_deep_sleep = 0;
 937                 wake_up_interruptible(&priv->ds_awake_q);
 938         }
 939
 940         priv->is_host_sleep_configured = 0;
 941         priv->is_host_sleep_activated = 0;
 942         wake_up_interruptible(&priv->host_sleep_q);
 943
 944         /* Stop the thread servicing the interrupts */
 945         priv->surpriseremoved = 1;
 946         kthread_stop(priv->main_thread);
 947
 948         lbs_free_adapter(priv);
 949         lbs_cfg_free(priv);
 950
 951         priv->dev = NULL;
 952         free_netdev(dev);
 953
 954         lbs_deb_leave(LBS_DEB_MAIN);
 955 }
 956 EXPORT_SYMBOL_GPL(lbs_remove_card);
 957
 958
 959 int lbs_rtap_supported(struct lbs_private *priv)
 960 {
 961         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
 962                 return 1;
 963
 964         /* newer firmware use a capability mask */
 965         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
 966                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
 967 }
 968
 969
 970 int lbs_start_card(struct lbs_private *priv)
 971 {
 972         struct net_device *dev = priv->dev;
 973         int ret = -1;
 974
 975         lbs_deb_enter(LBS_DEB_MAIN);
 976
 977         /* poke the firmware */
 978         ret = lbs_setup_firmware(priv);
 979         if (ret)
 980                 goto done;
 981
 982         if (lbs_cfg_register(priv)) {
 983                 lbs_pr_err("cannot register device\n");
 984                 goto done;
 985         }
 986
 987         lbs_update_channel(priv);
 988
 989         lbs_init_mesh(priv);
 990
 991         lbs_debugfs_init_one(priv, dev);
 992
 993         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
 994
 995         ret = 0;
 996
 997 done:
 998         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 999         return ret;
1000 }
1001 EXPORT_SYMBOL_GPL(lbs_start_card);
1002
1003
1004 void lbs_stop_card(struct lbs_private *priv)
1005 {
1006         struct net_device *dev;
1007         struct cmd_ctrl_node *cmdnode;
1008         unsigned long flags;
1009
1010         lbs_deb_enter(LBS_DEB_MAIN);
1011
1012         if (!priv)
1013                 goto out;
1014         dev = priv->dev;
1015
1016         netif_stop_queue(dev);
1017         netif_carrier_off(dev);
1018
1019         lbs_debugfs_remove_one(priv);
1020         lbs_deinit_mesh(priv);
1021
1022         /* Delete the timeout of the currently processing command */
1023         del_timer_sync(&priv->command_timer);
1024         del_timer_sync(&priv->auto_deepsleep_timer);
1025
1026         /* Flush pending command nodes */
1027         spin_lock_irqsave(&priv->driver_lock, flags);
1028         lbs_deb_main("clearing pending commands\n");
1029         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1030                 cmdnode->result = -ENOENT;
1031                 cmdnode->cmdwaitqwoken = 1;
1032                 wake_up_interruptible(&cmdnode->cmdwait_q);
1033         }
1034
1035         /* Flush the command the card is currently processing */
1036         if (priv->cur_cmd) {
1037                 lbs_deb_main("clearing current command\n");
1038                 priv->cur_cmd->result = -ENOENT;
1039                 priv->cur_cmd->cmdwaitqwoken = 1;
1040                 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1041         }
1042         lbs_deb_main("done clearing commands\n");
1043         spin_unlock_irqrestore(&priv->driver_lock, flags);
1044
1045         unregister_netdev(dev);
1046
1047 out:
1048         lbs_deb_leave(LBS_DEB_MAIN);
1049 }
1050 EXPORT_SYMBOL_GPL(lbs_stop_card);
1051
1052
1053 void lbs_queue_event(struct lbs_private *priv, u32 event)
1054 {
1055         unsigned long flags;
1056
1057         lbs_deb_enter(LBS_DEB_THREAD);
1058         spin_lock_irqsave(&priv->driver_lock, flags);
1059
1060         if (priv->psstate == PS_STATE_SLEEP)
1061                 priv->psstate = PS_STATE_AWAKE;
1062
1063         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1064
1065         wake_up_interruptible(&priv->waitq);
1066
1067         spin_unlock_irqrestore(&priv->driver_lock, flags);
1068         lbs_deb_leave(LBS_DEB_THREAD);
1069 }
1070 EXPORT_SYMBOL_GPL(lbs_queue_event);
1071
1072 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1073 {
1074         lbs_deb_enter(LBS_DEB_THREAD);
1075
1076         if (priv->psstate == PS_STATE_SLEEP)
1077                 priv->psstate = PS_STATE_AWAKE;
1078
1079         /* Swap buffers by flipping the response index */
1080         BUG_ON(resp_idx > 1);
1081         priv->resp_idx = resp_idx;
1082
1083         wake_up_interruptible(&priv->waitq);
1084
1085         lbs_deb_leave(LBS_DEB_THREAD);
1086 }
1087 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1088
1089 static int __init lbs_init_module(void)
1090 {
1091         lbs_deb_enter(LBS_DEB_MAIN);
1092         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1093         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1094         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1095         confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1096         lbs_debugfs_init();
1097         lbs_deb_leave(LBS_DEB_MAIN);
1098         return 0;
1099 }
1100
1101 static void __exit lbs_exit_module(void)
1102 {
1103         lbs_deb_enter(LBS_DEB_MAIN);
1104         lbs_debugfs_remove();
1105         lbs_deb_leave(LBS_DEB_MAIN);
1106 }
1107
1108 module_init(lbs_init_module);
1109 module_exit(lbs_exit_module);
1110
1111 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1112 MODULE_AUTHOR("Marvell International Ltd.");
1113 MODULE_LICENSE("GPL");