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