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 "sbi.h"
  19 #include "decl.h"
  20 #include "dev.h"
  21 #include "fw.h"
  22 #include "wext.h"
  23 #include "debugfs.h"
  24 #include "assoc.h"
  25
  26 #define DRIVER_RELEASE_VERSION "320.p0"
  27 const char libertas_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  28 #ifdef  DEBUG
  29     "-dbg"
  30 #endif
  31     "";
  32
  33
  34 /* Module parameters */
  35 unsigned int libertas_debug = 0;
  36 module_param(libertas_debug, int, 0644);
  37
  38
  39
  40 #define WLAN_TX_PWR_DEFAULT             20      /*100mW */
  41 #define WLAN_TX_PWR_US_DEFAULT          20      /*100mW */
  42 #define WLAN_TX_PWR_JP_DEFAULT          16      /*50mW */
  43 #define WLAN_TX_PWR_FR_DEFAULT          20      /*100mW */
  44 #define WLAN_TX_PWR_EMEA_DEFAULT        20      /*100mW */
  45
  46 /* Format { channel, frequency (MHz), maxtxpower } */
  47 /* band: 'B/G', region: USA FCC/Canada IC */
  48 static struct chan_freq_power channel_freq_power_US_BG[] = {
  49         {1, 2412, WLAN_TX_PWR_US_DEFAULT},
  50         {2, 2417, WLAN_TX_PWR_US_DEFAULT},
  51         {3, 2422, WLAN_TX_PWR_US_DEFAULT},
  52         {4, 2427, WLAN_TX_PWR_US_DEFAULT},
  53         {5, 2432, WLAN_TX_PWR_US_DEFAULT},
  54         {6, 2437, WLAN_TX_PWR_US_DEFAULT},
  55         {7, 2442, WLAN_TX_PWR_US_DEFAULT},
  56         {8, 2447, WLAN_TX_PWR_US_DEFAULT},
  57         {9, 2452, WLAN_TX_PWR_US_DEFAULT},
  58         {10, 2457, WLAN_TX_PWR_US_DEFAULT},
  59         {11, 2462, WLAN_TX_PWR_US_DEFAULT}
  60 };
  61
  62 /* band: 'B/G', region: Europe ETSI */
  63 static struct chan_freq_power channel_freq_power_EU_BG[] = {
  64         {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
  65         {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
  66         {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
  67         {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
  68         {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
  69         {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
  70         {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
  71         {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
  72         {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
  73         {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
  74         {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
  75         {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
  76         {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
  77 };
  78
  79 /* band: 'B/G', region: Spain */
  80 static struct chan_freq_power channel_freq_power_SPN_BG[] = {
  81         {10, 2457, WLAN_TX_PWR_DEFAULT},
  82         {11, 2462, WLAN_TX_PWR_DEFAULT}
  83 };
  84
  85 /* band: 'B/G', region: France */
  86 static struct chan_freq_power channel_freq_power_FR_BG[] = {
  87         {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
  88         {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
  89         {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
  90         {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
  91 };
  92
  93 /* band: 'B/G', region: Japan */
  94 static struct chan_freq_power channel_freq_power_JPN_BG[] = {
  95         {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
  96         {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
  97         {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
  98         {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
  99         {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
 100         {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
 101         {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
 102         {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
 103         {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
 104         {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
 105         {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
 106         {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
 107         {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
 108         {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
 109 };
 110
 111 /**
 112  * the structure for channel, frequency and power
 113  */
 114 struct region_cfp_table {
 115         u8 region;
 116         struct chan_freq_power *cfp_BG;
 117         int cfp_no_BG;
 118 };
 119
 120 /**
 121  * the structure for the mapping between region and CFP
 122  */
 123 static struct region_cfp_table region_cfp_table[] = {
 124         {0x10,                  /*US FCC */
 125          channel_freq_power_US_BG,
 126          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 127          }
 128         ,
 129         {0x20,                  /*CANADA IC */
 130          channel_freq_power_US_BG,
 131          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 132          }
 133         ,
 134         {0x30, /*EU*/ channel_freq_power_EU_BG,
 135          sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
 136          }
 137         ,
 138         {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
 139          sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
 140          }
 141         ,
 142         {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
 143          sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
 144          }
 145         ,
 146         {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
 147          sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
 148          }
 149         ,
 150 /*Add new region here */
 151 };
 152
 153 /**
 154  * the rates supported
 155  */
 156 u8 libertas_supported_rates[G_SUPPORTED_RATES] =
 157     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 158 0 };
 159
 160 /**
 161  * the rates supported for ad-hoc G mode
 162  */
 163 u8 libertas_adhoc_rates_g[G_SUPPORTED_RATES] =
 164     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 165 0 };
 166
 167 /**
 168  * the rates supported for ad-hoc B mode
 169  */
 170 u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
 171
 172 /**
 173  * the table to keep region code
 174  */
 175 u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
 176     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
 177
 178 static u8 *default_fw_name = "usb8388.bin";
 179
 180 /**
 181  * Attributes exported through sysfs
 182  */
 183
 184 /**
 185  * @brief Get function for sysfs attribute libertas_mpp
 186  */
 187 static ssize_t libertas_mpp_get(struct device * dev,
 188                 struct device_attribute *attr, char * buf) {
 189         struct cmd_ds_mesh_access mesh_access;
 190
 191         memset(&mesh_access, 0, sizeof(mesh_access));
 192         libertas_prepare_and_send_command(to_net_dev(dev)->priv,
 193                         cmd_mesh_access,
 194                         cmd_act_mesh_get_mpp,
 195                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 196
 197         return snprintf(buf, 3, "%d\n", mesh_access.data[0]);
 198 }
 199
 200 /**
 201  * @brief Set function for sysfs attribute libertas_mpp
 202  */
 203 static ssize_t libertas_mpp_set(struct device * dev,
 204                 struct device_attribute *attr, const char * buf, size_t count) {
 205         struct cmd_ds_mesh_access mesh_access;
 206
 207         memset(&mesh_access, 0, sizeof(mesh_access));
 208         sscanf(buf, "%d", &(mesh_access.data[0]));
 209         libertas_prepare_and_send_command((to_net_dev(dev))->priv,
 210                         cmd_mesh_access,
 211                         cmd_act_mesh_set_mpp,
 212                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 213         return strlen(buf);
 214 }
 215
 216 /**
 217  * libertas_mpp attribute to be exported per mshX interface
 218  * through sysfs (/sys/class/net/mshX/libertas-mpp)
 219  */
 220 static DEVICE_ATTR(libertas_mpp, 0644, libertas_mpp_get,
 221                 libertas_mpp_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->wlan_dev.netdev);
 269                 netif_carrier_on(priv->mesh_dev);
 270         } else {
 271                 netif_carrier_off(priv->wlan_dev.netdev);
 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->wlan_dev.netdev) ;
 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->wlan_dev.netdev);
 311         if (priv->open == 0)
 312                 return wlan_dev_open(priv->wlan_dev.netdev) ;
 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->wlan_dev.netdev);
 323         netif_carrier_off(priv->mesh_dev);
 324         priv->open = 0;
 325
 326         lbs_deb_leave(LBS_DEB_NET);
 327         return 0;
 328 }
 329
 330 /**
 331  *  @brief This function closes the mshX interface
 332  *
 333  *  @param dev     A pointer to net_device structure
 334  *  @return        0
 335  */
 336 static int mesh_close(struct net_device *dev)
 337 {
 338         wlan_private *priv = (wlan_private *) (dev->priv);
 339
 340         priv->mesh_open = 0;
 341         netif_stop_queue(priv->mesh_dev);
 342         if (priv->infra_open == 0)
 343                 return wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
 344         else
 345                 return 0;
 346 }
 347
 348 /**
 349  *  @brief This function closes the ethX interface
 350  *
 351  *  @param dev     A pointer to net_device structure
 352  *  @return        0
 353  */
 354 static int wlan_close(struct net_device *dev)
 355 {
 356         wlan_private *priv = (wlan_private *) dev->priv;
 357
 358         netif_stop_queue(priv->wlan_dev.netdev);
 359         priv->infra_open = 0;
 360         if (priv->mesh_open == 0)
 361                 return wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
 362         else
 363                 return 0;
 364 }
 365
 366
 367 static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 368 {
 369         int ret = 0;
 370         wlan_private *priv = dev->priv;
 371
 372         lbs_deb_enter(LBS_DEB_NET);
 373
 374         if (priv->wlan_dev.dnld_sent || priv->adapter->TxLockFlag) {
 375                 priv->stats.tx_dropped++;
 376                 goto done;
 377         }
 378
 379         netif_stop_queue(priv->wlan_dev.netdev);
 380         netif_stop_queue(priv->mesh_dev);
 381
 382         if (libertas_process_tx(priv, skb) == 0)
 383                 dev->trans_start = jiffies;
 384 done:
 385         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 386         return ret;
 387 }
 388
 389 /**
 390  * @brief Mark mesh packets and handover them to wlan_hard_start_xmit
 391  *
 392  */
 393 static int mesh_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 394 {
 395         wlan_private *priv = dev->priv;
 396         int ret;
 397
 398         lbs_deb_enter(LBS_DEB_MESH);
 399
 400         SET_MESH_FRAME(skb);
 401
 402         ret = wlan_hard_start_xmit(skb, priv->wlan_dev.netdev);
 403         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 404         return ret;
 405 }
 406
 407 /**
 408  * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
 409  *
 410  */
 411 static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 412 {
 413         int ret;
 414
 415         lbs_deb_enter(LBS_DEB_NET);
 416
 417         UNSET_MESH_FRAME(skb);
 418
 419         ret = wlan_hard_start_xmit(skb, dev);
 420         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 421         return ret;
 422 }
 423
 424 static void wlan_tx_timeout(struct net_device *dev)
 425 {
 426         wlan_private *priv = (wlan_private *) dev->priv;
 427
 428         lbs_deb_enter(LBS_DEB_TX);
 429
 430         lbs_pr_err("tx watch dog timeout\n");
 431
 432         priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
 433         dev->trans_start = jiffies;
 434
 435         if (priv->adapter->currenttxskb) {
 436                 if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
 437                         /* If we are here, we have not received feedback from
 438                            the previous packet.  Assume TX_FAIL and move on. */
 439                         priv->adapter->eventcause = 0x01000000;
 440                         libertas_send_tx_feedback(priv);
 441                 } else
 442                         wake_up_interruptible(&priv->mainthread.waitq);
 443         } else if (priv->adapter->connect_status == libertas_connected) {
 444                 netif_wake_queue(priv->wlan_dev.netdev);
 445                 netif_wake_queue(priv->mesh_dev);
 446         }
 447
 448         lbs_deb_leave(LBS_DEB_TX);
 449 }
 450
 451 /**
 452  *  @brief This function returns the network statistics
 453  *
 454  *  @param dev     A pointer to wlan_private structure
 455  *  @return        A pointer to net_device_stats structure
 456  */
 457 static struct net_device_stats *wlan_get_stats(struct net_device *dev)
 458 {
 459         wlan_private *priv = (wlan_private *) dev->priv;
 460
 461         return &priv->stats;
 462 }
 463
 464 static int wlan_set_mac_address(struct net_device *dev, void *addr)
 465 {
 466         int ret = 0;
 467         wlan_private *priv = (wlan_private *) dev->priv;
 468         wlan_adapter *adapter = priv->adapter;
 469         struct sockaddr *phwaddr = addr;
 470
 471         lbs_deb_enter(LBS_DEB_NET);
 472
 473         memset(adapter->current_addr, 0, ETH_ALEN);
 474
 475         /* dev->dev_addr is 8 bytes */
 476         lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
 477
 478         lbs_dbg_hex("addr:", phwaddr->sa_data, ETH_ALEN);
 479         memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);
 480
 481         ret = libertas_prepare_and_send_command(priv, cmd_802_11_mac_address,
 482                                     cmd_act_set,
 483                                     cmd_option_waitforrsp, 0, NULL);
 484
 485         if (ret) {
 486                 lbs_deb_net("set MAC address failed\n");
 487                 ret = -1;
 488                 goto done;
 489         }
 490
 491         lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
 492         memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
 493         if (priv->mesh_dev)
 494                 memcpy(priv->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
 495
 496 done:
 497         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 498         return ret;
 499 }
 500
 501 static int wlan_copy_multicast_address(wlan_adapter * adapter,
 502                                      struct net_device *dev)
 503 {
 504         int i = 0;
 505         struct dev_mc_list *mcptr = dev->mc_list;
 506
 507         for (i = 0; i < dev->mc_count; i++) {
 508                 memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
 509                 mcptr = mcptr->next;
 510         }
 511
 512         return i;
 513
 514 }
 515
 516 static void wlan_set_multicast_list(struct net_device *dev)
 517 {
 518         wlan_private *priv = dev->priv;
 519         wlan_adapter *adapter = priv->adapter;
 520         int oldpacketfilter;
 521
 522         lbs_deb_enter(LBS_DEB_NET);
 523
 524         oldpacketfilter = adapter->currentpacketfilter;
 525
 526         if (dev->flags & IFF_PROMISC) {
 527                 lbs_deb_net("enable promiscuous mode\n");
 528                 adapter->currentpacketfilter |=
 529                     cmd_act_mac_promiscuous_enable;
 530                 adapter->currentpacketfilter &=
 531                     ~(cmd_act_mac_all_multicast_enable |
 532                       cmd_act_mac_multicast_enable);
 533         } else {
 534                 /* Multicast */
 535                 adapter->currentpacketfilter &=
 536                     ~cmd_act_mac_promiscuous_enable;
 537
 538                 if (dev->flags & IFF_ALLMULTI || dev->mc_count >
 539                     MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 540                         lbs_deb_net( "enabling all multicast\n");
 541                         adapter->currentpacketfilter |=
 542                             cmd_act_mac_all_multicast_enable;
 543                         adapter->currentpacketfilter &=
 544                             ~cmd_act_mac_multicast_enable;
 545                 } else {
 546                         adapter->currentpacketfilter &=
 547                             ~cmd_act_mac_all_multicast_enable;
 548
 549                         if (!dev->mc_count) {
 550                                 lbs_deb_net("no multicast addresses, "
 551                                        "disabling multicast\n");
 552                                 adapter->currentpacketfilter &=
 553                                     ~cmd_act_mac_multicast_enable;
 554                         } else {
 555                                 int i;
 556
 557                                 adapter->currentpacketfilter |=
 558                                     cmd_act_mac_multicast_enable;
 559
 560                                 adapter->nr_of_multicastmacaddr =
 561                                     wlan_copy_multicast_address(adapter, dev);
 562
 563                                 lbs_deb_net("multicast addresses: %d\n",
 564                                        dev->mc_count);
 565
 566                                 for (i = 0; i < dev->mc_count; i++) {
 567                                         lbs_deb_net("Multicast address %d:"
 568                                                MAC_FMT "\n", i,
 569                                                adapter->multicastlist[i][0],
 570                                                adapter->multicastlist[i][1],
 571                                                adapter->multicastlist[i][2],
 572                                                adapter->multicastlist[i][3],
 573                                                adapter->multicastlist[i][4],
 574                                                adapter->multicastlist[i][5]);
 575                                 }
 576                                 /* send multicast addresses to firmware */
 577                                 libertas_prepare_and_send_command(priv,
 578                                                       cmd_mac_multicast_adr,
 579                                                       cmd_act_set, 0, 0,
 580                                                       NULL);
 581                         }
 582                 }
 583         }
 584
 585         if (adapter->currentpacketfilter != oldpacketfilter) {
 586                 libertas_set_mac_packet_filter(priv);
 587         }
 588
 589         lbs_deb_leave(LBS_DEB_NET);
 590 }
 591
 592 /**
 593  *  @brief This function handles the major jobs in the WLAN driver.
 594  *  It handles all events generated by firmware, RX data received
 595  *  from firmware and TX data sent from kernel.
 596  *
 597  *  @param data    A pointer to wlan_thread structure
 598  *  @return        0
 599  */
 600 static int wlan_service_main_thread(void *data)
 601 {
 602         struct wlan_thread *thread = data;
 603         wlan_private *priv = thread->priv;
 604         wlan_adapter *adapter = priv->adapter;
 605         wait_queue_t wait;
 606         u8 ireg = 0;
 607
 608         lbs_deb_enter(LBS_DEB_THREAD);
 609
 610         wlan_activate_thread(thread);
 611
 612         init_waitqueue_entry(&wait, current);
 613
 614         for (;;) {
 615                 lbs_deb_thread( "main-thread 111: intcounter=%d "
 616                        "currenttxskb=%p dnld_sent=%d\n",
 617                        adapter->intcounter,
 618                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 619
 620                 add_wait_queue(&thread->waitq, &wait);
 621                 set_current_state(TASK_INTERRUPTIBLE);
 622                 spin_lock_irq(&adapter->driver_lock);
 623                 if ((adapter->psstate == PS_STATE_SLEEP) ||
 624                     (!adapter->intcounter
 625                      && (priv->wlan_dev.dnld_sent || adapter->cur_cmd ||
 626                          list_empty(&adapter->cmdpendingq)))) {
 627                         lbs_deb_thread(
 628                                "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
 629                                adapter->connect_status, adapter->intcounter,
 630                                adapter->psmode, adapter->psstate);
 631                         spin_unlock_irq(&adapter->driver_lock);
 632                         schedule();
 633                 } else
 634                         spin_unlock_irq(&adapter->driver_lock);
 635
 636
 637                 lbs_deb_thread(
 638                        "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
 639                        "dnld_sent=%d\n", adapter->intcounter,
 640                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 641
 642                 set_current_state(TASK_RUNNING);
 643                 remove_wait_queue(&thread->waitq, &wait);
 644                 try_to_freeze();
 645
 646                 lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
 647                        "dnld_sent=%d\n",
 648                        adapter->intcounter,
 649                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 650
 651                 if (kthread_should_stop()
 652                     || adapter->surpriseremoved) {
 653                         lbs_deb_thread(
 654                                "main-thread: break from main thread: surpriseremoved=0x%x\n",
 655                                adapter->surpriseremoved);
 656                         break;
 657                 }
 658
 659
 660                 spin_lock_irq(&adapter->driver_lock);
 661                 if (adapter->intcounter) {
 662                         u8 int_status;
 663                         adapter->intcounter = 0;
 664                         int_status = libertas_sbi_get_int_status(priv, &ireg);
 665
 666                         if (int_status) {
 667                                 lbs_deb_thread(
 668                                        "main-thread: reading HOST_INT_STATUS_REG failed\n");
 669                                 spin_unlock_irq(&adapter->driver_lock);
 670                                 continue;
 671                         }
 672                         adapter->hisregcpy |= ireg;
 673                 }
 674
 675                 lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
 676                        "dnld_sent=%d\n",
 677                        adapter->intcounter,
 678                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 679
 680                 /* command response? */
 681                 if (adapter->hisregcpy & his_cmdupldrdy) {
 682                         lbs_deb_thread("main-thread: cmd response ready\n");
 683
 684                         adapter->hisregcpy &= ~his_cmdupldrdy;
 685                         spin_unlock_irq(&adapter->driver_lock);
 686                         libertas_process_rx_command(priv);
 687                         spin_lock_irq(&adapter->driver_lock);
 688                 }
 689
 690                 /* Any Card Event */
 691                 if (adapter->hisregcpy & his_cardevent) {
 692                         lbs_deb_thread("main-thread: Card Event Activity\n");
 693
 694                         adapter->hisregcpy &= ~his_cardevent;
 695
 696                         if (libertas_sbi_read_event_cause(priv)) {
 697                                 lbs_pr_alert(
 698                                        "main-thread: libertas_sbi_read_event_cause failed\n");
 699                                 spin_unlock_irq(&adapter->driver_lock);
 700                                 continue;
 701                         }
 702                         spin_unlock_irq(&adapter->driver_lock);
 703                         libertas_process_event(priv);
 704                 } else
 705                         spin_unlock_irq(&adapter->driver_lock);
 706
 707                 /* Check if we need to confirm Sleep Request received previously */
 708                 if (adapter->psstate == PS_STATE_PRE_SLEEP) {
 709                         if (!priv->wlan_dev.dnld_sent && !adapter->cur_cmd) {
 710                                 if (adapter->connect_status ==
 711                                     libertas_connected) {
 712                                         lbs_deb_thread(
 713                                                "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
 714                                                "dnld_sent=%d cur_cmd=%p, confirm now\n",
 715                                                adapter->intcounter,
 716                                                adapter->currenttxskb,
 717                                                priv->wlan_dev.dnld_sent,
 718                                                adapter->cur_cmd);
 719
 720                                         libertas_ps_confirm_sleep(priv,
 721                                                        (u16) adapter->psmode);
 722                                 } else {
 723                                         /* workaround for firmware sending
 724                                          * deauth/linkloss event immediately
 725                                          * after sleep request, remove this
 726                                          * after firmware fixes it
 727                                          */
 728                                         adapter->psstate = PS_STATE_AWAKE;
 729                                         lbs_pr_alert(
 730                                                "main-thread: ignore PS_SleepConfirm in non-connected state\n");
 731                                 }
 732                         }
 733                 }
 734
 735                 /* The PS state is changed during processing of Sleep Request
 736                  * event above
 737                  */
 738                 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
 739                     (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
 740                         continue;
 741
 742                 /* Execute the next command */
 743                 if (!priv->wlan_dev.dnld_sent && !priv->adapter->cur_cmd)
 744                         libertas_execute_next_command(priv);
 745
 746                 /* Wake-up command waiters which can't sleep in
 747                  * libertas_prepare_and_send_command
 748                  */
 749                 if (!adapter->nr_cmd_pending)
 750                         wake_up_all(&adapter->cmd_pending);
 751
 752                 libertas_tx_runqueue(priv);
 753         }
 754
 755         del_timer(&adapter->command_timer);
 756         adapter->nr_cmd_pending = 0;
 757         wake_up_all(&adapter->cmd_pending);
 758         wlan_deactivate_thread(thread);
 759
 760         lbs_deb_leave(LBS_DEB_THREAD);
 761         return 0;
 762 }
 763
 764 /**
 765  * @brief This function adds the card. it will probe the
 766  * card, allocate the wlan_priv and initialize the device.
 767  *
 768  *  @param card    A pointer to card
 769  *  @return        A pointer to wlan_private structure
 770  */
 771 wlan_private *wlan_add_card(void *card)
 772 {
 773         struct net_device *dev = NULL;
 774         wlan_private *priv = NULL;
 775
 776         lbs_deb_enter(LBS_DEB_NET);
 777
 778         /* Allocate an Ethernet device and register it */
 779         if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
 780                 lbs_pr_err("init ethX device failed\n");
 781                 return NULL;
 782         }
 783         priv = dev->priv;
 784
 785         /* allocate buffer for wlan_adapter */
 786         if (!(priv->adapter = kzalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
 787                 lbs_pr_err("allocate buffer for wlan_adapter failed\n");
 788                 goto err_kzalloc;
 789         }
 790
 791         priv->wlan_dev.netdev = dev;
 792         priv->wlan_dev.card = card;
 793         priv->mesh_open = 0;
 794         priv->infra_open = 0;
 795
 796         SET_MODULE_OWNER(dev);
 797
 798         /* Setup the OS Interface to our functions */
 799         dev->open = wlan_open;
 800         dev->hard_start_xmit = wlan_pre_start_xmit;
 801         dev->stop = wlan_close;
 802         dev->do_ioctl = libertas_do_ioctl;
 803         dev->set_mac_address = wlan_set_mac_address;
 804         dev->tx_timeout = wlan_tx_timeout;
 805         dev->get_stats = wlan_get_stats;
 806         dev->watchdog_timeo = 5 * HZ;
 807         dev->ethtool_ops = &libertas_ethtool_ops;
 808 #ifdef  WIRELESS_EXT
 809         dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 810 #endif
 811 #define NETIF_F_DYNALLOC 16
 812         dev->features |= NETIF_F_DYNALLOC;
 813         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 814         dev->set_multicast_list = wlan_set_multicast_list;
 815
 816         INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
 817         INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
 818
 819         spin_lock_init(&priv->adapter->driver_lock);
 820         init_waitqueue_head(&priv->adapter->cmd_pending);
 821         priv->adapter->nr_cmd_pending = 0;
 822         goto done;
 823
 824 err_kzalloc:
 825         free_netdev(dev);
 826 done:
 827         lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
 828         return priv;
 829 }
 830
 831 int libertas_activate_card(wlan_private *priv)
 832 {
 833         struct net_device *dev = priv->wlan_dev.netdev;
 834         int ret = -1;
 835
 836         lbs_deb_enter(LBS_DEB_MAIN);
 837
 838         lbs_deb_thread("Starting kthread...\n");
 839         priv->mainthread.priv = priv;
 840         wlan_create_thread(wlan_service_main_thread,
 841                            &priv->mainthread, "wlan_main_service");
 842
 843         priv->assoc_thread =
 844                 create_singlethread_workqueue("libertas_assoc");
 845         INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
 846
 847         /*
 848          * Register the device. Fillup the private data structure with
 849          * relevant information from the card and request for the required
 850          * IRQ.
 851          */
 852         if (libertas_sbi_register_dev(priv) < 0) {
 853                 lbs_pr_err("failed to register WLAN device\n");
 854                 goto err_registerdev;
 855         }
 856
 857         /* init FW and HW */
 858         if (libertas_init_fw(priv)) {
 859                 lbs_pr_err("firmware init failed\n");
 860                 goto err_registerdev;
 861         }
 862
 863         if (register_netdev(dev)) {
 864                 lbs_pr_err("cannot register ethX device\n");
 865                 goto err_init_fw;
 866         }
 867
 868         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
 869
 870         libertas_debugfs_init_one(priv, dev);
 871
 872         ret = 0;
 873         goto done;
 874
 875 err_init_fw:
 876         libertas_sbi_unregister_dev(priv);
 877 err_registerdev:
 878         destroy_workqueue(priv->assoc_thread);
 879         /* Stop the thread servicing the interrupts */
 880         wake_up_interruptible(&priv->mainthread.waitq);
 881         wlan_terminate_thread(&priv->mainthread);
 882         kfree(priv->adapter);
 883         free_netdev(dev);
 884 done:
 885         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 886         return ret;
 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 wlan_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
 954 static void wake_pending_cmdnodes(wlan_private *priv)
 955 {
 956         struct cmd_ctrl_node *cmdnode;
 957         unsigned long flags;
 958
 959         lbs_deb_enter(LBS_DEB_CMD);
 960
 961         spin_lock_irqsave(&priv->adapter->driver_lock, flags);
 962         list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
 963                 cmdnode->cmdwaitqwoken = 1;
 964                 wake_up_interruptible(&cmdnode->cmdwait_q);
 965         }
 966         spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);
 967 }
 968
 969
 970 int wlan_remove_card(wlan_private *priv)
 971 {
 972         wlan_adapter *adapter;
 973         struct net_device *dev;
 974         union iwreq_data wrqu;
 975
 976         lbs_deb_enter(LBS_DEB_NET);
 977
 978         if (!priv)
 979                 goto out;
 980
 981         adapter = priv->adapter;
 982
 983         if (!adapter)
 984                 goto out;
 985
 986         dev = priv->wlan_dev.netdev;
 987
 988         netif_stop_queue(priv->wlan_dev.netdev);
 989         netif_carrier_off(priv->wlan_dev.netdev);
 990
 991         wake_pending_cmdnodes(priv);
 992
 993         unregister_netdev(dev);
 994
 995         cancel_delayed_work(&priv->assoc_work);
 996         destroy_workqueue(priv->assoc_thread);
 997
 998         if (adapter->psmode == wlan802_11powermodemax_psp) {
 999                 adapter->psmode = wlan802_11powermodecam;
1000                 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
1001         }
1002
1003         memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
1004         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1005         wireless_send_event(priv->wlan_dev.netdev, SIOCGIWAP, &wrqu, NULL);
1006
1007         adapter->surpriseremoved = 1;
1008
1009         /* Stop the thread servicing the interrupts */
1010         wlan_terminate_thread(&priv->mainthread);
1011
1012         libertas_debugfs_remove_one(priv);
1013
1014         lbs_deb_net("free adapter\n");
1015         libertas_free_adapter(priv);
1016
1017         lbs_deb_net("unregister finish\n");
1018
1019         priv->wlan_dev.netdev = NULL;
1020         free_netdev(dev);
1021
1022 out:
1023         lbs_deb_leave(LBS_DEB_NET);
1024         return 0;
1025 }
1026
1027 void wlan_remove_mesh(wlan_private *priv)
1028 {
1029         struct net_device *mesh_dev;
1030
1031         lbs_deb_enter(LBS_DEB_NET);
1032
1033         if (!priv)
1034                 goto out;
1035
1036         mesh_dev = priv->mesh_dev;
1037
1038         netif_stop_queue(mesh_dev);
1039         netif_carrier_off(priv->mesh_dev);
1040
1041         device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
1042         unregister_netdev(mesh_dev);
1043
1044         priv->mesh_dev = NULL ;
1045         free_netdev(mesh_dev);
1046
1047 out:
1048         lbs_deb_leave(LBS_DEB_NET);
1049 }
1050
1051 /**
1052  *  @brief This function finds the CFP in
1053  *  region_cfp_table based on region and band parameter.
1054  *
1055  *  @param region  The region code
1056  *  @param band    The band
1057  *  @param cfp_no  A pointer to CFP number
1058  *  @return        A pointer to CFP
1059  */
1060 struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
1061 {
1062         int i, end;
1063
1064         lbs_deb_enter(LBS_DEB_MAIN);
1065
1066         end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
1067
1068         for (i = 0; i < end ; i++) {
1069                 lbs_deb_main("region_cfp_table[i].region=%d\n",
1070                         region_cfp_table[i].region);
1071                 if (region_cfp_table[i].region == region) {
1072                         *cfp_no = region_cfp_table[i].cfp_no_BG;
1073                         lbs_deb_leave(LBS_DEB_MAIN);
1074                         return region_cfp_table[i].cfp_BG;
1075                 }
1076         }
1077
1078         lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
1079         return NULL;
1080 }
1081
1082 int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
1083 {
1084         wlan_adapter *adapter = priv->adapter;
1085         int ret = 0;
1086         int i = 0;
1087
1088         struct chan_freq_power *cfp;
1089         int cfp_no;
1090
1091         lbs_deb_enter(LBS_DEB_MAIN);
1092
1093         memset(adapter->region_channel, 0, sizeof(adapter->region_channel));
1094
1095         {
1096                 cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
1097                 if (cfp != NULL) {
1098                         adapter->region_channel[i].nrcfp = cfp_no;
1099                         adapter->region_channel[i].CFP = cfp;
1100                 } else {
1101                         lbs_deb_main("wrong region code %#x in band B/G\n",
1102                                region);
1103                         ret = -1;
1104                         goto out;
1105                 }
1106                 adapter->region_channel[i].valid = 1;
1107                 adapter->region_channel[i].region = region;
1108                 adapter->region_channel[i].band = band;
1109                 i++;
1110         }
1111 out:
1112         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1113         return ret;
1114 }
1115
1116 /**
1117  *  @brief This function handles the interrupt. it will change PS
1118  *  state if applicable. it will wake up main_thread to handle
1119  *  the interrupt event as well.
1120  *
1121  *  @param dev     A pointer to net_device structure
1122  *  @return        n/a
1123  */
1124 void libertas_interrupt(struct net_device *dev)
1125 {
1126         wlan_private *priv = dev->priv;
1127
1128         lbs_deb_enter(LBS_DEB_THREAD);
1129
1130         lbs_deb_thread("libertas_interrupt: intcounter=%d\n",
1131                priv->adapter->intcounter);
1132
1133         priv->adapter->intcounter++;
1134
1135         if (priv->adapter->psstate == PS_STATE_SLEEP) {
1136                 priv->adapter->psstate = PS_STATE_AWAKE;
1137                 netif_wake_queue(dev);
1138                 netif_wake_queue(priv->mesh_dev);
1139         }
1140
1141         wake_up_interruptible(&priv->mainthread.waitq);
1142
1143         lbs_deb_leave(LBS_DEB_THREAD);
1144 }
1145
1146 static int wlan_init_module(void)
1147 {
1148         int ret = 0;
1149
1150         lbs_deb_enter(LBS_DEB_MAIN);
1151
1152         if (libertas_fw_name == NULL) {
1153                 libertas_fw_name = default_fw_name;
1154         }
1155
1156         libertas_debugfs_init();
1157
1158         if (libertas_sbi_register()) {
1159                 ret = -1;
1160                 libertas_debugfs_remove();
1161         }
1162
1163         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1164         return ret;
1165 }
1166
1167 static void wlan_cleanup_module(void)
1168 {
1169         lbs_deb_enter(LBS_DEB_MAIN);
1170
1171         libertas_sbi_unregister();
1172         libertas_debugfs_remove();
1173
1174         lbs_deb_leave(LBS_DEB_MAIN);
1175 }
1176
1177 module_init(wlan_init_module);
1178 module_exit(wlan_cleanup_module);
1179
1180 MODULE_DESCRIPTION("M-WLAN Driver");
1181 MODULE_AUTHOR("Marvell International Ltd.");
1182 MODULE_LICENSE("GPL");