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/freezer.h>
  10 #include <linux/etherdevice.h>
  11 #include <linux/netdevice.h>
  12 #include <linux/if_arp.h>
  13
  14 #include <net/iw_handler.h>
  15 #include <net/ieee80211.h>
  16
  17 #include "host.h"
  18 #include "decl.h"
  19 #include "dev.h"
  20 #include "wext.h"
  21 #include "debugfs.h"
  22 #include "assoc.h"
  23
  24 #define DRIVER_RELEASE_VERSION "322.p0"
  25 const char libertas_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  26 #ifdef  DEBUG
  27     "-dbg"
  28 #endif
  29     "";
  30
  31
  32 /* Module parameters */
  33 unsigned int libertas_debug = 0;
  34 module_param(libertas_debug, int, 0644);
  35 EXPORT_SYMBOL_GPL(libertas_debug);
  36
  37
  38 #define WLAN_TX_PWR_DEFAULT             20      /*100mW */
  39 #define WLAN_TX_PWR_US_DEFAULT          20      /*100mW */
  40 #define WLAN_TX_PWR_JP_DEFAULT          16      /*50mW */
  41 #define WLAN_TX_PWR_FR_DEFAULT          20      /*100mW */
  42 #define WLAN_TX_PWR_EMEA_DEFAULT        20      /*100mW */
  43
  44 /* Format { channel, frequency (MHz), maxtxpower } */
  45 /* band: 'B/G', region: USA FCC/Canada IC */
  46 static struct chan_freq_power channel_freq_power_US_BG[] = {
  47         {1, 2412, WLAN_TX_PWR_US_DEFAULT},
  48         {2, 2417, WLAN_TX_PWR_US_DEFAULT},
  49         {3, 2422, WLAN_TX_PWR_US_DEFAULT},
  50         {4, 2427, WLAN_TX_PWR_US_DEFAULT},
  51         {5, 2432, WLAN_TX_PWR_US_DEFAULT},
  52         {6, 2437, WLAN_TX_PWR_US_DEFAULT},
  53         {7, 2442, WLAN_TX_PWR_US_DEFAULT},
  54         {8, 2447, WLAN_TX_PWR_US_DEFAULT},
  55         {9, 2452, WLAN_TX_PWR_US_DEFAULT},
  56         {10, 2457, WLAN_TX_PWR_US_DEFAULT},
  57         {11, 2462, WLAN_TX_PWR_US_DEFAULT}
  58 };
  59
  60 /* band: 'B/G', region: Europe ETSI */
  61 static struct chan_freq_power channel_freq_power_EU_BG[] = {
  62         {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
  63         {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
  64         {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
  65         {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
  66         {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
  67         {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
  68         {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
  69         {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
  70         {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
  71         {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
  72         {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
  73         {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
  74         {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
  75 };
  76
  77 /* band: 'B/G', region: Spain */
  78 static struct chan_freq_power channel_freq_power_SPN_BG[] = {
  79         {10, 2457, WLAN_TX_PWR_DEFAULT},
  80         {11, 2462, WLAN_TX_PWR_DEFAULT}
  81 };
  82
  83 /* band: 'B/G', region: France */
  84 static struct chan_freq_power channel_freq_power_FR_BG[] = {
  85         {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
  86         {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
  87         {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
  88         {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
  89 };
  90
  91 /* band: 'B/G', region: Japan */
  92 static struct chan_freq_power channel_freq_power_JPN_BG[] = {
  93         {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
  94         {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
  95         {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
  96         {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
  97         {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
  98         {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
  99         {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
 100         {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
 101         {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
 102         {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
 103         {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
 104         {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
 105         {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
 106         {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
 107 };
 108
 109 /**
 110  * the structure for channel, frequency and power
 111  */
 112 struct region_cfp_table {
 113         u8 region;
 114         struct chan_freq_power *cfp_BG;
 115         int cfp_no_BG;
 116 };
 117
 118 /**
 119  * the structure for the mapping between region and CFP
 120  */
 121 static struct region_cfp_table region_cfp_table[] = {
 122         {0x10,                  /*US FCC */
 123          channel_freq_power_US_BG,
 124          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 125          }
 126         ,
 127         {0x20,                  /*CANADA IC */
 128          channel_freq_power_US_BG,
 129          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 130          }
 131         ,
 132         {0x30, /*EU*/ channel_freq_power_EU_BG,
 133          sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
 134          }
 135         ,
 136         {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
 137          sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
 138          }
 139         ,
 140         {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
 141          sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
 142          }
 143         ,
 144         {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
 145          sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
 146          }
 147         ,
 148 /*Add new region here */
 149 };
 150
 151 /**
 152  * the rates supported
 153  */
 154 u8 libertas_supported_rates[G_SUPPORTED_RATES] =
 155     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 156 0 };
 157
 158 /**
 159  * the rates supported for ad-hoc G mode
 160  */
 161 u8 libertas_adhoc_rates_g[G_SUPPORTED_RATES] =
 162     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 163 0 };
 164
 165 /**
 166  * the rates supported for ad-hoc B mode
 167  */
 168 u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
 169
 170 /**
 171  * the table to keep region code
 172  */
 173 u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
 174     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
 175
 176 /**
 177  * Attributes exported through sysfs
 178  */
 179
 180 /**
 181  * @brief Get function for sysfs attribute anycast_mask
 182  */
 183 static ssize_t libertas_anycast_get(struct device * dev,
 184                 struct device_attribute *attr, char * buf)
 185 {
 186         struct cmd_ds_mesh_access mesh_access;
 187
 188         memset(&mesh_access, 0, sizeof(mesh_access));
 189         libertas_prepare_and_send_command(to_net_dev(dev)->priv,
 190                         cmd_mesh_access,
 191                         cmd_act_mesh_get_anycast,
 192                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 193
 194         return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
 195 }
 196
 197 /**
 198  * @brief Set function for sysfs attribute anycast_mask
 199  */
 200 static ssize_t libertas_anycast_set(struct device * dev,
 201                 struct device_attribute *attr, const char * buf, size_t count)
 202 {
 203         struct cmd_ds_mesh_access mesh_access;
 204         uint32_t datum;
 205
 206         memset(&mesh_access, 0, sizeof(mesh_access));
 207         sscanf(buf, "%x", &datum);
 208         mesh_access.data[0] = cpu_to_le32(datum);
 209
 210         libertas_prepare_and_send_command((to_net_dev(dev))->priv,
 211                         cmd_mesh_access,
 212                         cmd_act_mesh_set_anycast,
 213                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 214         return strlen(buf);
 215 }
 216
 217 /**
 218  * anycast_mask attribute to be exported per mshX interface
 219  * through sysfs (/sys/class/net/mshX/anycast_mask)
 220  */
 221 static DEVICE_ATTR(anycast_mask, 0644, libertas_anycast_get, libertas_anycast_set);
 222
 223 /**
 224  *  @brief Check if the device can be open and wait if necessary.
 225  *
 226  *  @param dev     A pointer to net_device structure
 227  *  @return        0
 228  *
 229  * For USB adapter, on some systems the device open handler will be
 230  * called before FW ready. Use the following flag check and wait
 231  * function to work around the issue.
 232  *
 233  */
 234 static int pre_open_check(struct net_device *dev)
 235 {
 236         wlan_private *priv = (wlan_private *) dev->priv;
 237         wlan_adapter *adapter = priv->adapter;
 238         int i = 0;
 239
 240         while (!adapter->fw_ready && i < 20) {
 241                 i++;
 242                 msleep_interruptible(100);
 243         }
 244         if (!adapter->fw_ready) {
 245                 lbs_pr_err("firmware not ready\n");
 246                 return -1;
 247         }
 248
 249         return 0;
 250 }
 251
 252 /**
 253  *  @brief This function opens the device
 254  *
 255  *  @param dev     A pointer to net_device structure
 256  *  @return        0
 257  */
 258 static int wlan_dev_open(struct net_device *dev)
 259 {
 260         wlan_private *priv = (wlan_private *) dev->priv;
 261         wlan_adapter *adapter = priv->adapter;
 262
 263         lbs_deb_enter(LBS_DEB_NET);
 264
 265         priv->open = 1;
 266
 267         if (adapter->connect_status == libertas_connected) {
 268                 netif_carrier_on(priv->dev);
 269                 netif_carrier_on(priv->mesh_dev);
 270         } else {
 271                 netif_carrier_off(priv->dev);
 272                 netif_carrier_off(priv->mesh_dev);
 273         }
 274
 275         lbs_deb_leave(LBS_DEB_NET);
 276         return 0;
 277 }
 278 /**
 279  *  @brief This function opens the mshX interface
 280  *
 281  *  @param dev     A pointer to net_device structure
 282  *  @return        0
 283  */
 284 static int mesh_open(struct net_device *dev)
 285 {
 286         wlan_private *priv = (wlan_private *) dev->priv ;
 287
 288         if (pre_open_check(dev) == -1)
 289                 return -1;
 290         priv->mesh_open = 1 ;
 291         netif_wake_queue(priv->mesh_dev);
 292         if (priv->infra_open == 0)
 293                 return wlan_dev_open(priv->dev) ;
 294         return 0;
 295 }
 296
 297 /**
 298  *  @brief This function opens the ethX interface
 299  *
 300  *  @param dev     A pointer to net_device structure
 301  *  @return        0
 302  */
 303 static int wlan_open(struct net_device *dev)
 304 {
 305         wlan_private *priv = (wlan_private *) dev->priv ;
 306
 307         if(pre_open_check(dev) == -1)
 308                 return -1;
 309         priv->infra_open = 1 ;
 310         netif_wake_queue(priv->dev);
 311         if (priv->open == 0)
 312                 return wlan_dev_open(priv->dev) ;
 313         return 0;
 314 }
 315
 316 static int wlan_dev_close(struct net_device *dev)
 317 {
 318         wlan_private *priv = dev->priv;
 319
 320         lbs_deb_enter(LBS_DEB_NET);
 321
 322         netif_carrier_off(priv->dev);
 323         priv->open = 0;
 324
 325         lbs_deb_leave(LBS_DEB_NET);
 326         return 0;
 327 }
 328
 329 /**
 330  *  @brief This function closes the mshX interface
 331  *
 332  *  @param dev     A pointer to net_device structure
 333  *  @return        0
 334  */
 335 static int mesh_close(struct net_device *dev)
 336 {
 337         wlan_private *priv = (wlan_private *) (dev->priv);
 338
 339         priv->mesh_open = 0;
 340         netif_stop_queue(priv->mesh_dev);
 341         if (priv->infra_open == 0)
 342                 return wlan_dev_close(dev);
 343         else
 344                 return 0;
 345 }
 346
 347 /**
 348  *  @brief This function closes the ethX interface
 349  *
 350  *  @param dev     A pointer to net_device structure
 351  *  @return        0
 352  */
 353 static int wlan_close(struct net_device *dev)
 354 {
 355         wlan_private *priv = (wlan_private *) dev->priv;
 356
 357         netif_stop_queue(dev);
 358         priv->infra_open = 0;
 359         if (priv->mesh_open == 0)
 360                 return wlan_dev_close(dev);
 361         else
 362                 return 0;
 363 }
 364
 365
 366 static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 367 {
 368         int ret = 0;
 369         wlan_private *priv = dev->priv;
 370
 371         lbs_deb_enter(LBS_DEB_NET);
 372
 373         if (priv->dnld_sent || priv->adapter->TxLockFlag) {
 374                 priv->stats.tx_dropped++;
 375                 goto done;
 376         }
 377
 378         netif_stop_queue(priv->dev);
 379         netif_stop_queue(priv->mesh_dev);
 380
 381         if (libertas_process_tx(priv, skb) == 0)
 382                 dev->trans_start = jiffies;
 383 done:
 384         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 385         return ret;
 386 }
 387
 388 /**
 389  * @brief Mark mesh packets and handover them to wlan_hard_start_xmit
 390  *
 391  */
 392 static int mesh_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 393 {
 394         wlan_private *priv = dev->priv;
 395         int ret;
 396
 397         lbs_deb_enter(LBS_DEB_MESH);
 398
 399         SET_MESH_FRAME(skb);
 400
 401         ret = wlan_hard_start_xmit(skb, priv->dev);
 402         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 403         return ret;
 404 }
 405
 406 /**
 407  * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
 408  *
 409  */
 410 static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 411 {
 412         int ret;
 413
 414         lbs_deb_enter(LBS_DEB_NET);
 415
 416         UNSET_MESH_FRAME(skb);
 417
 418         ret = wlan_hard_start_xmit(skb, dev);
 419         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 420         return ret;
 421 }
 422
 423 static void wlan_tx_timeout(struct net_device *dev)
 424 {
 425         wlan_private *priv = (wlan_private *) dev->priv;
 426
 427         lbs_deb_enter(LBS_DEB_TX);
 428
 429         lbs_pr_err("tx watch dog timeout\n");
 430
 431         priv->dnld_sent = DNLD_RES_RECEIVED;
 432         dev->trans_start = jiffies;
 433
 434         if (priv->adapter->currenttxskb) {
 435                 if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
 436                         /* If we are here, we have not received feedback from
 437                            the previous packet.  Assume TX_FAIL and move on. */
 438                         priv->adapter->eventcause = 0x01000000;
 439                         libertas_send_tx_feedback(priv);
 440                 } else
 441                         wake_up_interruptible(&priv->mainthread.waitq);
 442         } else if (priv->adapter->connect_status == libertas_connected) {
 443                 netif_wake_queue(priv->dev);
 444                 netif_wake_queue(priv->mesh_dev);
 445         }
 446
 447         lbs_deb_leave(LBS_DEB_TX);
 448 }
 449
 450 /**
 451  *  @brief This function returns the network statistics
 452  *
 453  *  @param dev     A pointer to wlan_private structure
 454  *  @return        A pointer to net_device_stats structure
 455  */
 456 static struct net_device_stats *wlan_get_stats(struct net_device *dev)
 457 {
 458         wlan_private *priv = (wlan_private *) dev->priv;
 459
 460         return &priv->stats;
 461 }
 462
 463 static int wlan_set_mac_address(struct net_device *dev, void *addr)
 464 {
 465         int ret = 0;
 466         wlan_private *priv = (wlan_private *) dev->priv;
 467         wlan_adapter *adapter = priv->adapter;
 468         struct sockaddr *phwaddr = addr;
 469
 470         lbs_deb_enter(LBS_DEB_NET);
 471
 472         /* In case it was called from the mesh device */
 473         dev = priv->dev ;
 474
 475         memset(adapter->current_addr, 0, ETH_ALEN);
 476
 477         /* dev->dev_addr is 8 bytes */
 478         lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
 479
 480         lbs_dbg_hex("addr:", phwaddr->sa_data, ETH_ALEN);
 481         memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);
 482
 483         ret = libertas_prepare_and_send_command(priv, cmd_802_11_mac_address,
 484                                     cmd_act_set,
 485                                     cmd_option_waitforrsp, 0, NULL);
 486
 487         if (ret) {
 488                 lbs_deb_net("set MAC address failed\n");
 489                 ret = -1;
 490                 goto done;
 491         }
 492
 493         lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
 494         memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
 495         if (priv->mesh_dev)
 496                 memcpy(priv->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
 497
 498 done:
 499         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 500         return ret;
 501 }
 502
 503 static int wlan_copy_multicast_address(wlan_adapter * adapter,
 504                                      struct net_device *dev)
 505 {
 506         int i = 0;
 507         struct dev_mc_list *mcptr = dev->mc_list;
 508
 509         for (i = 0; i < dev->mc_count; i++) {
 510                 memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
 511                 mcptr = mcptr->next;
 512         }
 513
 514         return i;
 515
 516 }
 517
 518 static void wlan_set_multicast_list(struct net_device *dev)
 519 {
 520         wlan_private *priv = dev->priv;
 521         wlan_adapter *adapter = priv->adapter;
 522         int oldpacketfilter;
 523
 524         lbs_deb_enter(LBS_DEB_NET);
 525
 526         oldpacketfilter = adapter->currentpacketfilter;
 527
 528         if (dev->flags & IFF_PROMISC) {
 529                 lbs_deb_net("enable promiscuous mode\n");
 530                 adapter->currentpacketfilter |=
 531                     cmd_act_mac_promiscuous_enable;
 532                 adapter->currentpacketfilter &=
 533                     ~(cmd_act_mac_all_multicast_enable |
 534                       cmd_act_mac_multicast_enable);
 535         } else {
 536                 /* Multicast */
 537                 adapter->currentpacketfilter &=
 538                     ~cmd_act_mac_promiscuous_enable;
 539
 540                 if (dev->flags & IFF_ALLMULTI || dev->mc_count >
 541                     MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 542                         lbs_deb_net( "enabling all multicast\n");
 543                         adapter->currentpacketfilter |=
 544                             cmd_act_mac_all_multicast_enable;
 545                         adapter->currentpacketfilter &=
 546                             ~cmd_act_mac_multicast_enable;
 547                 } else {
 548                         adapter->currentpacketfilter &=
 549                             ~cmd_act_mac_all_multicast_enable;
 550
 551                         if (!dev->mc_count) {
 552                                 lbs_deb_net("no multicast addresses, "
 553                                        "disabling multicast\n");
 554                                 adapter->currentpacketfilter &=
 555                                     ~cmd_act_mac_multicast_enable;
 556                         } else {
 557                                 int i;
 558
 559                                 adapter->currentpacketfilter |=
 560                                     cmd_act_mac_multicast_enable;
 561
 562                                 adapter->nr_of_multicastmacaddr =
 563                                     wlan_copy_multicast_address(adapter, dev);
 564
 565                                 lbs_deb_net("multicast addresses: %d\n",
 566                                        dev->mc_count);
 567
 568                                 for (i = 0; i < dev->mc_count; i++) {
 569                                         lbs_deb_net("Multicast address %d:"
 570                                                MAC_FMT "\n", i,
 571                                                adapter->multicastlist[i][0],
 572                                                adapter->multicastlist[i][1],
 573                                                adapter->multicastlist[i][2],
 574                                                adapter->multicastlist[i][3],
 575                                                adapter->multicastlist[i][4],
 576                                                adapter->multicastlist[i][5]);
 577                                 }
 578                                 /* send multicast addresses to firmware */
 579                                 libertas_prepare_and_send_command(priv,
 580                                                       cmd_mac_multicast_adr,
 581                                                       cmd_act_set, 0, 0,
 582                                                       NULL);
 583                         }
 584                 }
 585         }
 586
 587         if (adapter->currentpacketfilter != oldpacketfilter) {
 588                 libertas_set_mac_packet_filter(priv);
 589         }
 590
 591         lbs_deb_leave(LBS_DEB_NET);
 592 }
 593
 594 /**
 595  *  @brief This function handles the major jobs in the WLAN driver.
 596  *  It handles all events generated by firmware, RX data received
 597  *  from firmware and TX data sent from kernel.
 598  *
 599  *  @param data    A pointer to wlan_thread structure
 600  *  @return        0
 601  */
 602 static int wlan_service_main_thread(void *data)
 603 {
 604         struct wlan_thread *thread = data;
 605         wlan_private *priv = thread->priv;
 606         wlan_adapter *adapter = priv->adapter;
 607         wait_queue_t wait;
 608         u8 ireg = 0;
 609
 610         lbs_deb_enter(LBS_DEB_THREAD);
 611
 612         wlan_activate_thread(thread);
 613
 614         init_waitqueue_entry(&wait, current);
 615
 616         for (;;) {
 617                 lbs_deb_thread( "main-thread 111: intcounter=%d "
 618                        "currenttxskb=%p dnld_sent=%d\n",
 619                        adapter->intcounter,
 620                        adapter->currenttxskb, priv->dnld_sent);
 621
 622                 add_wait_queue(&thread->waitq, &wait);
 623                 set_current_state(TASK_INTERRUPTIBLE);
 624                 spin_lock_irq(&adapter->driver_lock);
 625                 if ((adapter->psstate == PS_STATE_SLEEP) ||
 626                     (!adapter->intcounter
 627                      && (priv->dnld_sent || adapter->cur_cmd ||
 628                          list_empty(&adapter->cmdpendingq)))) {
 629                         lbs_deb_thread(
 630                                "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
 631                                adapter->connect_status, adapter->intcounter,
 632                                adapter->psmode, adapter->psstate);
 633                         spin_unlock_irq(&adapter->driver_lock);
 634                         schedule();
 635                 } else
 636                         spin_unlock_irq(&adapter->driver_lock);
 637
 638
 639                 lbs_deb_thread(
 640                        "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
 641                        "dnld_sent=%d\n", adapter->intcounter,
 642                        adapter->currenttxskb, priv->dnld_sent);
 643
 644                 set_current_state(TASK_RUNNING);
 645                 remove_wait_queue(&thread->waitq, &wait);
 646                 try_to_freeze();
 647
 648                 lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
 649                        "dnld_sent=%d\n",
 650                        adapter->intcounter,
 651                        adapter->currenttxskb, priv->dnld_sent);
 652
 653                 if (kthread_should_stop()
 654                     || adapter->surpriseremoved) {
 655                         lbs_deb_thread(
 656                                "main-thread: break from main thread: surpriseremoved=0x%x\n",
 657                                adapter->surpriseremoved);
 658                         break;
 659                 }
 660
 661
 662                 spin_lock_irq(&adapter->driver_lock);
 663                 if (adapter->intcounter) {
 664                         u8 int_status;
 665                         adapter->intcounter = 0;
 666                         int_status = priv->hw_get_int_status(priv, &ireg);
 667
 668                         if (int_status) {
 669                                 lbs_deb_thread(
 670                                        "main-thread: reading HOST_INT_STATUS_REG failed\n");
 671                                 spin_unlock_irq(&adapter->driver_lock);
 672                                 continue;
 673                         }
 674                         adapter->hisregcpy |= ireg;
 675                 }
 676
 677                 lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
 678                        "dnld_sent=%d\n",
 679                        adapter->intcounter,
 680                        adapter->currenttxskb, priv->dnld_sent);
 681
 682                 /* command response? */
 683                 if (adapter->hisregcpy & his_cmdupldrdy) {
 684                         lbs_deb_thread("main-thread: cmd response ready\n");
 685
 686                         adapter->hisregcpy &= ~his_cmdupldrdy;
 687                         spin_unlock_irq(&adapter->driver_lock);
 688                         libertas_process_rx_command(priv);
 689                         spin_lock_irq(&adapter->driver_lock);
 690                 }
 691
 692                 /* Any Card Event */
 693                 if (adapter->hisregcpy & his_cardevent) {
 694                         lbs_deb_thread("main-thread: Card Event Activity\n");
 695
 696                         adapter->hisregcpy &= ~his_cardevent;
 697
 698                         if (priv->hw_read_event_cause(priv)) {
 699                                 lbs_pr_alert(
 700                                        "main-thread: hw_read_event_cause failed\n");
 701                                 spin_unlock_irq(&adapter->driver_lock);
 702                                 continue;
 703                         }
 704                         spin_unlock_irq(&adapter->driver_lock);
 705                         libertas_process_event(priv);
 706                 } else
 707                         spin_unlock_irq(&adapter->driver_lock);
 708
 709                 /* Check if we need to confirm Sleep Request received previously */
 710                 if (adapter->psstate == PS_STATE_PRE_SLEEP) {
 711                         if (!priv->dnld_sent && !adapter->cur_cmd) {
 712                                 if (adapter->connect_status ==
 713                                     libertas_connected) {
 714                                         lbs_deb_thread(
 715                                                "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
 716                                                "dnld_sent=%d cur_cmd=%p, confirm now\n",
 717                                                adapter->intcounter,
 718                                                adapter->currenttxskb,
 719                                                priv->dnld_sent,
 720                                                adapter->cur_cmd);
 721
 722                                         libertas_ps_confirm_sleep(priv,
 723                                                        (u16) adapter->psmode);
 724                                 } else {
 725                                         /* workaround for firmware sending
 726                                          * deauth/linkloss event immediately
 727                                          * after sleep request, remove this
 728                                          * after firmware fixes it
 729                                          */
 730                                         adapter->psstate = PS_STATE_AWAKE;
 731                                         lbs_pr_alert(
 732                                                "main-thread: ignore PS_SleepConfirm in non-connected state\n");
 733                                 }
 734                         }
 735                 }
 736
 737                 /* The PS state is changed during processing of Sleep Request
 738                  * event above
 739                  */
 740                 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
 741                     (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
 742                         continue;
 743
 744                 /* Execute the next command */
 745                 if (!priv->dnld_sent && !priv->adapter->cur_cmd)
 746                         libertas_execute_next_command(priv);
 747
 748                 /* Wake-up command waiters which can't sleep in
 749                  * libertas_prepare_and_send_command
 750                  */
 751                 if (!adapter->nr_cmd_pending)
 752                         wake_up_all(&adapter->cmd_pending);
 753
 754                 libertas_tx_runqueue(priv);
 755         }
 756
 757         del_timer(&adapter->command_timer);
 758         adapter->nr_cmd_pending = 0;
 759         wake_up_all(&adapter->cmd_pending);
 760         wlan_deactivate_thread(thread);
 761
 762         lbs_deb_leave(LBS_DEB_THREAD);
 763         return 0;
 764 }
 765
 766 /**
 767  * @brief This function adds the card. it will probe the
 768  * card, allocate the wlan_priv and initialize the device.
 769  *
 770  *  @param card    A pointer to card
 771  *  @return        A pointer to wlan_private structure
 772  */
 773 wlan_private *libertas_add_card(void *card, struct device *dmdev)
 774 {
 775         struct net_device *dev = NULL;
 776         wlan_private *priv = NULL;
 777
 778         lbs_deb_enter(LBS_DEB_NET);
 779
 780         /* Allocate an Ethernet device and register it */
 781         if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
 782                 lbs_pr_err("init ethX device failed\n");
 783                 return NULL;
 784         }
 785         priv = dev->priv;
 786
 787         /* allocate buffer for wlan_adapter */
 788         if (!(priv->adapter = kzalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
 789                 lbs_pr_err("allocate buffer for wlan_adapter failed\n");
 790                 goto err_kzalloc;
 791         }
 792
 793         priv->dev = dev;
 794         priv->card = card;
 795         priv->mesh_open = 0;
 796         priv->infra_open = 0;
 797
 798         SET_MODULE_OWNER(dev);
 799
 800         /* Setup the OS Interface to our functions */
 801         dev->open = wlan_open;
 802         dev->hard_start_xmit = wlan_pre_start_xmit;
 803         dev->stop = wlan_close;
 804         dev->do_ioctl = libertas_do_ioctl;
 805         dev->set_mac_address = wlan_set_mac_address;
 806         dev->tx_timeout = wlan_tx_timeout;
 807         dev->get_stats = wlan_get_stats;
 808         dev->watchdog_timeo = 5 * HZ;
 809         dev->ethtool_ops = &libertas_ethtool_ops;
 810 #ifdef  WIRELESS_EXT
 811         dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 812 #endif
 813 #define NETIF_F_DYNALLOC 16
 814         dev->features |= NETIF_F_DYNALLOC;
 815         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 816         dev->set_multicast_list = wlan_set_multicast_list;
 817
 818         SET_NETDEV_DEV(dev, dmdev);
 819
 820         INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
 821         INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
 822
 823         spin_lock_init(&priv->adapter->driver_lock);
 824         init_waitqueue_head(&priv->adapter->cmd_pending);
 825         priv->adapter->nr_cmd_pending = 0;
 826         goto done;
 827
 828 err_kzalloc:
 829         free_netdev(dev);
 830         priv = NULL;
 831 done:
 832         lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
 833         return priv;
 834 }
 835 EXPORT_SYMBOL_GPL(libertas_add_card);
 836
 837 int libertas_activate_card(wlan_private *priv, char *fw_name)
 838 {
 839         struct net_device *dev = priv->dev;
 840         int ret = -1;
 841
 842         lbs_deb_enter(LBS_DEB_MAIN);
 843
 844         lbs_deb_thread("Starting kthread...\n");
 845         priv->mainthread.priv = priv;
 846         wlan_create_thread(wlan_service_main_thread,
 847                            &priv->mainthread, "wlan_main_service");
 848
 849         priv->assoc_thread =
 850                 create_singlethread_workqueue("libertas_assoc");
 851         INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
 852         INIT_WORK(&priv->sync_channel, libertas_sync_channel);
 853
 854         /*
 855          * Register the device. Fillup the private data structure with
 856          * relevant information from the card and request for the required
 857          * IRQ.
 858          */
 859         if (priv->hw_register_dev(priv) < 0) {
 860                 lbs_pr_err("failed to register WLAN device\n");
 861                 goto err_registerdev;
 862         }
 863
 864         /* init FW and HW */
 865         if (fw_name && libertas_init_fw(priv, fw_name)) {
 866                 lbs_pr_err("firmware init failed\n");
 867                 goto err_registerdev;
 868         }
 869
 870         if (register_netdev(dev)) {
 871                 lbs_pr_err("cannot register ethX device\n");
 872                 goto err_init_fw;
 873         }
 874
 875         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
 876
 877         libertas_debugfs_init_one(priv, dev);
 878
 879         ret = 0;
 880         goto done;
 881
 882 err_init_fw:
 883         priv->hw_unregister_dev(priv);
 884 err_registerdev:
 885         destroy_workqueue(priv->assoc_thread);
 886         /* Stop the thread servicing the interrupts */
 887         wake_up_interruptible(&priv->mainthread.waitq);
 888         wlan_terminate_thread(&priv->mainthread);
 889 done:
 890         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 891         return ret;
 892 }
 893 EXPORT_SYMBOL_GPL(libertas_activate_card);
 894
 895
 896 /**
 897  * @brief This function adds mshX interface
 898  *
 899  *  @param priv    A pointer to the wlan_private structure
 900  *  @return        0 if successful, -X otherwise
 901  */
 902 int libertas_add_mesh(wlan_private *priv, struct device *dev)
 903 {
 904         struct net_device *mesh_dev = NULL;
 905         int ret = 0;
 906
 907         lbs_deb_enter(LBS_DEB_MESH);
 908
 909         /* Allocate a virtual mesh device */
 910         if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
 911                 lbs_deb_mesh("init mshX device failed\n");
 912                 ret = -ENOMEM;
 913                 goto done;
 914         }
 915         mesh_dev->priv = priv;
 916         priv->mesh_dev = mesh_dev;
 917
 918         SET_MODULE_OWNER(mesh_dev);
 919
 920         mesh_dev->open = mesh_open;
 921         mesh_dev->hard_start_xmit = mesh_pre_start_xmit;
 922         mesh_dev->stop = mesh_close;
 923         mesh_dev->do_ioctl = libertas_do_ioctl;
 924         mesh_dev->get_stats = wlan_get_stats;
 925         mesh_dev->set_mac_address = wlan_set_mac_address;
 926         mesh_dev->ethtool_ops = &libertas_ethtool_ops;
 927         memcpy(mesh_dev->dev_addr, priv->dev->dev_addr,
 928                         sizeof(priv->dev->dev_addr));
 929
 930         SET_NETDEV_DEV(priv->mesh_dev, dev);
 931
 932 #ifdef  WIRELESS_EXT
 933         mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def;
 934 #endif
 935 #define NETIF_F_DYNALLOC 16
 936
 937         /* Register virtual mesh interface */
 938         ret = register_netdev(mesh_dev);
 939         if (ret) {
 940                 lbs_pr_err("cannot register mshX virtual interface\n");
 941                 goto err_free;
 942         }
 943
 944         ret = device_create_file(&(mesh_dev->dev), &dev_attr_anycast_mask);
 945         if (ret)
 946                 goto err_unregister;
 947
 948         /* Everything successful */
 949         ret = 0;
 950         goto done;
 951
 952
 953 err_unregister:
 954         unregister_netdev(mesh_dev);
 955
 956 err_free:
 957         free_netdev(mesh_dev);
 958
 959 done:
 960         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 961         return ret;
 962 }
 963 EXPORT_SYMBOL_GPL(libertas_add_mesh);
 964
 965 static void wake_pending_cmdnodes(wlan_private *priv)
 966 {
 967         struct cmd_ctrl_node *cmdnode;
 968         unsigned long flags;
 969
 970         lbs_deb_enter(LBS_DEB_CMD);
 971
 972         spin_lock_irqsave(&priv->adapter->driver_lock, flags);
 973         list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
 974                 cmdnode->cmdwaitqwoken = 1;
 975                 wake_up_interruptible(&cmdnode->cmdwait_q);
 976         }
 977         spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);
 978 }
 979
 980
 981 int libertas_remove_card(wlan_private *priv)
 982 {
 983         wlan_adapter *adapter;
 984         struct net_device *dev;
 985         union iwreq_data wrqu;
 986
 987         lbs_deb_enter(LBS_DEB_NET);
 988
 989         if (!priv)
 990                 goto out;
 991
 992         adapter = priv->adapter;
 993
 994         if (!adapter)
 995                 goto out;
 996
 997         dev = priv->dev;
 998
 999         netif_stop_queue(priv->dev);
1000         netif_carrier_off(priv->dev);
1001
1002         wake_pending_cmdnodes(priv);
1003
1004         unregister_netdev(dev);
1005
1006         cancel_delayed_work(&priv->assoc_work);
1007         destroy_workqueue(priv->assoc_thread);
1008
1009         if (adapter->psmode == wlan802_11powermodemax_psp) {
1010                 adapter->psmode = wlan802_11powermodecam;
1011                 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
1012         }
1013
1014         memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
1015         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1016         wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
1017
1018         adapter->surpriseremoved = 1;
1019
1020         /* Stop the thread servicing the interrupts */
1021         wlan_terminate_thread(&priv->mainthread);
1022
1023         libertas_debugfs_remove_one(priv);
1024
1025         lbs_deb_net("free adapter\n");
1026         libertas_free_adapter(priv);
1027
1028         lbs_deb_net("unregister finish\n");
1029
1030         priv->dev = NULL;
1031         free_netdev(dev);
1032
1033 out:
1034         lbs_deb_leave(LBS_DEB_NET);
1035         return 0;
1036 }
1037 EXPORT_SYMBOL_GPL(libertas_remove_card);
1038
1039
1040 void libertas_remove_mesh(wlan_private *priv)
1041 {
1042         struct net_device *mesh_dev;
1043
1044         lbs_deb_enter(LBS_DEB_NET);
1045
1046         if (!priv)
1047                 goto out;
1048
1049         mesh_dev = priv->mesh_dev;
1050
1051         netif_stop_queue(mesh_dev);
1052         netif_carrier_off(priv->mesh_dev);
1053
1054         device_remove_file(&(mesh_dev->dev), &dev_attr_anycast_mask);
1055         unregister_netdev(mesh_dev);
1056
1057         priv->mesh_dev = NULL ;
1058         free_netdev(mesh_dev);
1059
1060 out:
1061         lbs_deb_leave(LBS_DEB_NET);
1062 }
1063 EXPORT_SYMBOL_GPL(libertas_remove_mesh);
1064
1065 /**
1066  *  @brief This function finds the CFP in
1067  *  region_cfp_table based on region and band parameter.
1068  *
1069  *  @param region  The region code
1070  *  @param band    The band
1071  *  @param cfp_no  A pointer to CFP number
1072  *  @return        A pointer to CFP
1073  */
1074 struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
1075 {
1076         int i, end;
1077
1078         lbs_deb_enter(LBS_DEB_MAIN);
1079
1080         end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
1081
1082         for (i = 0; i < end ; i++) {
1083                 lbs_deb_main("region_cfp_table[i].region=%d\n",
1084                         region_cfp_table[i].region);
1085                 if (region_cfp_table[i].region == region) {
1086                         *cfp_no = region_cfp_table[i].cfp_no_BG;
1087                         lbs_deb_leave(LBS_DEB_MAIN);
1088                         return region_cfp_table[i].cfp_BG;
1089                 }
1090         }
1091
1092         lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
1093         return NULL;
1094 }
1095
1096 int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
1097 {
1098         wlan_adapter *adapter = priv->adapter;
1099         int ret = 0;
1100         int i = 0;
1101
1102         struct chan_freq_power *cfp;
1103         int cfp_no;
1104
1105         lbs_deb_enter(LBS_DEB_MAIN);
1106
1107         memset(adapter->region_channel, 0, sizeof(adapter->region_channel));
1108
1109         {
1110                 cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
1111                 if (cfp != NULL) {
1112                         adapter->region_channel[i].nrcfp = cfp_no;
1113                         adapter->region_channel[i].CFP = cfp;
1114                 } else {
1115                         lbs_deb_main("wrong region code %#x in band B/G\n",
1116                                region);
1117                         ret = -1;
1118                         goto out;
1119                 }
1120                 adapter->region_channel[i].valid = 1;
1121                 adapter->region_channel[i].region = region;
1122                 adapter->region_channel[i].band = band;
1123                 i++;
1124         }
1125 out:
1126         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1127         return ret;
1128 }
1129
1130 /**
1131  *  @brief This function handles the interrupt. it will change PS
1132  *  state if applicable. it will wake up main_thread to handle
1133  *  the interrupt event as well.
1134  *
1135  *  @param dev     A pointer to net_device structure
1136  *  @return        n/a
1137  */
1138 void libertas_interrupt(struct net_device *dev)
1139 {
1140         wlan_private *priv = dev->priv;
1141
1142         lbs_deb_enter(LBS_DEB_THREAD);
1143
1144         lbs_deb_thread("libertas_interrupt: intcounter=%d\n",
1145                priv->adapter->intcounter);
1146
1147         priv->adapter->intcounter++;
1148
1149         if (priv->adapter->psstate == PS_STATE_SLEEP) {
1150                 priv->adapter->psstate = PS_STATE_AWAKE;
1151                 netif_wake_queue(dev);
1152                 netif_wake_queue(priv->mesh_dev);
1153         }
1154
1155         wake_up_interruptible(&priv->mainthread.waitq);
1156
1157         lbs_deb_leave(LBS_DEB_THREAD);
1158 }
1159 EXPORT_SYMBOL_GPL(libertas_interrupt);
1160
1161 static int libertas_init_module(void)
1162 {
1163         lbs_deb_enter(LBS_DEB_MAIN);
1164         libertas_debugfs_init();
1165         lbs_deb_leave(LBS_DEB_MAIN);
1166         return 0;
1167 }
1168
1169 static void libertas_exit_module(void)
1170 {
1171         lbs_deb_enter(LBS_DEB_MAIN);
1172
1173         libertas_debugfs_remove();
1174
1175         lbs_deb_leave(LBS_DEB_MAIN);
1176 }
1177
1178 module_init(libertas_init_module);
1179 module_exit(libertas_exit_module);
1180
1181 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1182 MODULE_AUTHOR("Marvell International Ltd.");
1183 MODULE_LICENSE("GPL");