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/delay.h>
   8 #include <linux/freezer.h>
   9 #include <linux/etherdevice.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/if_arp.h>
  12
  13 #include <net/iw_handler.h>
  14 #include <net/ieee80211.h>
  15
  16 #include "host.h"
  17 #include "sbi.h"
  18 #include "decl.h"
  19 #include "dev.h"
  20 #include "fw.h"
  21 #include "wext.h"
  22 #include "debugfs.h"
  23 #include "assoc.h"
  24
  25 #define DRIVER_RELEASE_VERSION "320.p0"
  26 const char libertas_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  27 #ifdef  DEBUG
  28     "-dbg"
  29 #endif
  30     "";
  31
  32 #define WLAN_TX_PWR_DEFAULT             20      /*100mW */
  33 #define WLAN_TX_PWR_US_DEFAULT          20      /*100mW */
  34 #define WLAN_TX_PWR_JP_DEFAULT          16      /*50mW */
  35 #define WLAN_TX_PWR_FR_DEFAULT          20      /*100mW */
  36 #define WLAN_TX_PWR_EMEA_DEFAULT        20      /*100mW */
  37
  38 /* Format { channel, frequency (MHz), maxtxpower } */
  39 /* band: 'B/G', region: USA FCC/Canada IC */
  40 static struct chan_freq_power channel_freq_power_US_BG[] = {
  41         {1, 2412, WLAN_TX_PWR_US_DEFAULT},
  42         {2, 2417, WLAN_TX_PWR_US_DEFAULT},
  43         {3, 2422, WLAN_TX_PWR_US_DEFAULT},
  44         {4, 2427, WLAN_TX_PWR_US_DEFAULT},
  45         {5, 2432, WLAN_TX_PWR_US_DEFAULT},
  46         {6, 2437, WLAN_TX_PWR_US_DEFAULT},
  47         {7, 2442, WLAN_TX_PWR_US_DEFAULT},
  48         {8, 2447, WLAN_TX_PWR_US_DEFAULT},
  49         {9, 2452, WLAN_TX_PWR_US_DEFAULT},
  50         {10, 2457, WLAN_TX_PWR_US_DEFAULT},
  51         {11, 2462, WLAN_TX_PWR_US_DEFAULT}
  52 };
  53
  54 /* band: 'B/G', region: Europe ETSI */
  55 static struct chan_freq_power channel_freq_power_EU_BG[] = {
  56         {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
  57         {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
  58         {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
  59         {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
  60         {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
  61         {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
  62         {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
  63         {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
  64         {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
  65         {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
  66         {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
  67         {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
  68         {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
  69 };
  70
  71 /* band: 'B/G', region: Spain */
  72 static struct chan_freq_power channel_freq_power_SPN_BG[] = {
  73         {10, 2457, WLAN_TX_PWR_DEFAULT},
  74         {11, 2462, WLAN_TX_PWR_DEFAULT}
  75 };
  76
  77 /* band: 'B/G', region: France */
  78 static struct chan_freq_power channel_freq_power_FR_BG[] = {
  79         {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
  80         {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
  81         {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
  82         {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
  83 };
  84
  85 /* band: 'B/G', region: Japan */
  86 static struct chan_freq_power channel_freq_power_JPN_BG[] = {
  87         {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
  88         {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
  89         {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
  90         {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
  91         {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
  92         {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
  93         {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
  94         {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
  95         {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
  96         {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
  97         {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
  98         {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
  99         {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
 100         {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
 101 };
 102
 103 /**
 104  * the structure for channel, frequency and power
 105  */
 106 struct region_cfp_table {
 107         u8 region;
 108         struct chan_freq_power *cfp_BG;
 109         int cfp_no_BG;
 110 };
 111
 112 /**
 113  * the structure for the mapping between region and CFP
 114  */
 115 static struct region_cfp_table region_cfp_table[] = {
 116         {0x10,                  /*US FCC */
 117          channel_freq_power_US_BG,
 118          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 119          }
 120         ,
 121         {0x20,                  /*CANADA IC */
 122          channel_freq_power_US_BG,
 123          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 124          }
 125         ,
 126         {0x30, /*EU*/ channel_freq_power_EU_BG,
 127          sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
 128          }
 129         ,
 130         {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
 131          sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
 132          }
 133         ,
 134         {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
 135          sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
 136          }
 137         ,
 138         {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
 139          sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
 140          }
 141         ,
 142 /*Add new region here */
 143 };
 144
 145 /**
 146  * the rates supported
 147  */
 148 u8 libertas_supported_rates[G_SUPPORTED_RATES] =
 149     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 150 0 };
 151
 152 /**
 153  * the rates supported for ad-hoc G mode
 154  */
 155 u8 libertas_adhoc_rates_g[G_SUPPORTED_RATES] =
 156     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 157 0 };
 158
 159 /**
 160  * the rates supported for ad-hoc B mode
 161  */
 162 u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
 163
 164 #define MAX_DEVS 5
 165 static struct net_device *libertas_devs[MAX_DEVS];
 166 static int libertas_found = 0;
 167
 168 /**
 169  * the table to keep region code
 170  */
 171 u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
 172     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
 173
 174 static u8 *default_fw_name = "usb8388.bin";
 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
 204         memset(&mesh_access, 0, sizeof(mesh_access));
 205         sscanf(buf, "%d", &(mesh_access.data[0]));
 206         libertas_prepare_and_send_command((to_net_dev(dev))->priv,
 207                         cmd_mesh_access,
 208                         cmd_act_mesh_set_mpp,
 209                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 210         return strlen(buf);
 211 }
 212
 213 /**
 214  * libertas_mpp attribute to be exported per mshX interface
 215  * through sysfs (/sys/class/net/mshX/libertas-mpp)
 216  */
 217 static DEVICE_ATTR(libertas_mpp, 0644, libertas_mpp_get,
 218                 libertas_mpp_set );
 219
 220 /**
 221  *  @brief Check if the device can be open and wait if necessary.
 222  *
 223  *  @param dev     A pointer to net_device structure
 224  *  @return        0
 225  *
 226  * For USB adapter, on some systems the device open handler will be
 227  * called before FW ready. Use the following flag check and wait
 228  * function to work around the issue.
 229  *
 230  */
 231 static int pre_open_check(struct net_device *dev)
 232 {
 233         wlan_private *priv = (wlan_private *) dev->priv;
 234         wlan_adapter *adapter = priv->adapter;
 235         int i = 0;
 236
 237         while (!adapter->fw_ready && i < 20) {
 238                 i++;
 239                 msleep_interruptible(100);
 240         }
 241         if (!adapter->fw_ready) {
 242                 lbs_pr_err("firmware not ready\n");
 243                 return -1;
 244         }
 245
 246         return 0;
 247 }
 248
 249 /**
 250  *  @brief This function opens the device
 251  *
 252  *  @param dev     A pointer to net_device structure
 253  *  @return        0
 254  */
 255 static int wlan_dev_open(struct net_device *dev)
 256 {
 257         wlan_private *priv = (wlan_private *) dev->priv;
 258         wlan_adapter *adapter = priv->adapter;
 259
 260         lbs_deb_enter(LBS_DEB_NET);
 261
 262         priv->open = 1;
 263
 264         if (adapter->connect_status == libertas_connected) {
 265                 netif_carrier_on(priv->wlan_dev.netdev);
 266         } else
 267                 netif_carrier_off(priv->wlan_dev.netdev);
 268
 269         lbs_deb_leave(LBS_DEB_NET);
 270         return 0;
 271 }
 272 /**
 273  *  @brief This function opens the mshX interface
 274  *
 275  *  @param dev     A pointer to net_device structure
 276  *  @return        0
 277  */
 278 static int mesh_open(struct net_device *dev)
 279 {
 280         wlan_private *priv = (wlan_private *) dev->priv ;
 281
 282         if(pre_open_check(dev) == -1)
 283                 return -1;
 284         priv->mesh_open = 1 ;
 285         netif_start_queue(priv->mesh_dev);
 286         if (priv->infra_open == 0)
 287                 return wlan_dev_open(priv->wlan_dev.netdev) ;
 288         return 0;
 289 }
 290
 291 /**
 292  *  @brief This function opens the ethX interface
 293  *
 294  *  @param dev     A pointer to net_device structure
 295  *  @return        0
 296  */
 297 static int wlan_open(struct net_device *dev)
 298 {
 299         wlan_private *priv = (wlan_private *) dev->priv ;
 300
 301         if(pre_open_check(dev) == -1)
 302                 return -1;
 303         priv->infra_open = 1 ;
 304         netif_wake_queue(priv->wlan_dev.netdev);
 305         if (priv->open == 0)
 306                 return wlan_dev_open(priv->wlan_dev.netdev) ;
 307         return 0;
 308 }
 309
 310 static int wlan_dev_close(struct net_device *dev)
 311 {
 312         wlan_private *priv = dev->priv;
 313
 314         lbs_deb_enter(LBS_DEB_NET);
 315
 316         netif_carrier_off(priv->wlan_dev.netdev);
 317         priv->open = 0;
 318
 319         lbs_deb_leave(LBS_DEB_NET);
 320         return 0;
 321 }
 322
 323 /**
 324  *  @brief This function closes the mshX interface
 325  *
 326  *  @param dev     A pointer to net_device structure
 327  *  @return        0
 328  */
 329 static int mesh_close(struct net_device *dev)
 330 {
 331         wlan_private *priv = (wlan_private *) (dev->priv);
 332
 333         priv->mesh_open = 0;
 334         netif_stop_queue(priv->mesh_dev);
 335         if (priv->infra_open == 0)
 336                 return wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
 337         else
 338                 return 0;
 339 }
 340
 341 /**
 342  *  @brief This function closes the ethX interface
 343  *
 344  *  @param dev     A pointer to net_device structure
 345  *  @return        0
 346  */
 347 static int wlan_close(struct net_device *dev) {
 348         wlan_private *priv = (wlan_private *) dev->priv;
 349
 350         netif_stop_queue(priv->wlan_dev.netdev);
 351         priv->infra_open = 0;
 352         if (priv->mesh_open == 0)
 353                 return wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
 354         else
 355                 return 0;
 356 }
 357
 358
 359 static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 360 {
 361         int ret = 0;
 362         wlan_private *priv = dev->priv;
 363
 364         lbs_deb_enter(LBS_DEB_NET);
 365
 366         if (priv->wlan_dev.dnld_sent || priv->adapter->TxLockFlag) {
 367                 priv->stats.tx_dropped++;
 368                 goto done;
 369         }
 370
 371         netif_stop_queue(priv->wlan_dev.netdev);
 372
 373         if (libertas_process_tx(priv, skb) == 0)
 374                 dev->trans_start = jiffies;
 375 done:
 376         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 377         return ret;
 378 }
 379
 380 /**
 381  * @brief Mark mesh packets and handover them to wlan_hard_start_xmit
 382  *
 383  */
 384 static int mesh_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 385 {
 386         wlan_private *priv = dev->priv;
 387         int ret;
 388
 389         lbs_deb_enter(LBS_DEB_MESH);
 390
 391         SET_MESH_FRAME(skb);
 392
 393         ret = wlan_hard_start_xmit(skb, priv->wlan_dev.netdev);
 394         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 395         return ret;
 396 }
 397
 398 /**
 399  * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
 400  *
 401  */
 402 static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
 403 {
 404         int ret;
 405
 406         lbs_deb_enter(LBS_DEB_NET);
 407
 408         UNSET_MESH_FRAME(skb);
 409
 410         ret = wlan_hard_start_xmit(skb, dev);
 411         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 412         return ret;
 413 }
 414
 415 static void wlan_tx_timeout(struct net_device *dev)
 416 {
 417         wlan_private *priv = (wlan_private *) dev->priv;
 418
 419         lbs_deb_enter(LBS_DEB_TX);
 420
 421         lbs_pr_err("tx watch dog timeout\n");
 422
 423         priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
 424         dev->trans_start = jiffies;
 425
 426         if (priv->adapter->currenttxskb) {
 427                 if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
 428                         /* If we are here, we have not received feedback from
 429                            the previous packet.  Assume TX_FAIL and move on. */
 430                         priv->adapter->eventcause = 0x01000000;
 431                         libertas_send_tx_feedback(priv);
 432                 } else
 433                         wake_up_interruptible(&priv->mainthread.waitq);
 434         } else if (priv->adapter->connect_status == libertas_connected)
 435                 netif_wake_queue(priv->wlan_dev.netdev);
 436
 437         lbs_deb_leave(LBS_DEB_TX);
 438 }
 439
 440 /**
 441  *  @brief This function returns the network statistics
 442  *
 443  *  @param dev     A pointer to wlan_private structure
 444  *  @return        A pointer to net_device_stats structure
 445  */
 446 static struct net_device_stats *wlan_get_stats(struct net_device *dev)
 447 {
 448         wlan_private *priv = (wlan_private *) dev->priv;
 449
 450         return &priv->stats;
 451 }
 452
 453 static int wlan_set_mac_address(struct net_device *dev, void *addr)
 454 {
 455         int ret = 0;
 456         wlan_private *priv = (wlan_private *) dev->priv;
 457         wlan_adapter *adapter = priv->adapter;
 458         struct sockaddr *phwaddr = addr;
 459
 460         lbs_deb_enter(LBS_DEB_NET);
 461
 462         memset(adapter->current_addr, 0, ETH_ALEN);
 463
 464         /* dev->dev_addr is 8 bytes */
 465         lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
 466
 467         lbs_dbg_hex("addr:", phwaddr->sa_data, ETH_ALEN);
 468         memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);
 469
 470         ret = libertas_prepare_and_send_command(priv, cmd_802_11_mac_address,
 471                                     cmd_act_set,
 472                                     cmd_option_waitforrsp, 0, NULL);
 473
 474         if (ret) {
 475                 lbs_deb_net("set MAC address failed\n");
 476                 ret = -1;
 477                 goto done;
 478         }
 479
 480         lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
 481         memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
 482         memcpy(((wlan_private *) dev->priv)->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
 483
 484 done:
 485         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 486         return ret;
 487 }
 488
 489 static int wlan_copy_multicast_address(wlan_adapter * adapter,
 490                                      struct net_device *dev)
 491 {
 492         int i = 0;
 493         struct dev_mc_list *mcptr = dev->mc_list;
 494
 495         for (i = 0; i < dev->mc_count; i++) {
 496                 memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
 497                 mcptr = mcptr->next;
 498         }
 499
 500         return i;
 501
 502 }
 503
 504 static void wlan_set_multicast_list(struct net_device *dev)
 505 {
 506         wlan_private *priv = dev->priv;
 507         wlan_adapter *adapter = priv->adapter;
 508         int oldpacketfilter;
 509
 510         lbs_deb_enter(LBS_DEB_NET);
 511
 512         oldpacketfilter = adapter->currentpacketfilter;
 513
 514         if (dev->flags & IFF_PROMISC) {
 515                 lbs_deb_net("enable promiscuous mode\n");
 516                 adapter->currentpacketfilter |=
 517                     cmd_act_mac_promiscuous_enable;
 518                 adapter->currentpacketfilter &=
 519                     ~(cmd_act_mac_all_multicast_enable |
 520                       cmd_act_mac_multicast_enable);
 521         } else {
 522                 /* Multicast */
 523                 adapter->currentpacketfilter &=
 524                     ~cmd_act_mac_promiscuous_enable;
 525
 526                 if (dev->flags & IFF_ALLMULTI || dev->mc_count >
 527                     MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 528                         lbs_deb_net( "enabling all multicast\n");
 529                         adapter->currentpacketfilter |=
 530                             cmd_act_mac_all_multicast_enable;
 531                         adapter->currentpacketfilter &=
 532                             ~cmd_act_mac_multicast_enable;
 533                 } else {
 534                         adapter->currentpacketfilter &=
 535                             ~cmd_act_mac_all_multicast_enable;
 536
 537                         if (!dev->mc_count) {
 538                                 lbs_deb_net("no multicast addresses, "
 539                                        "disabling multicast\n");
 540                                 adapter->currentpacketfilter &=
 541                                     ~cmd_act_mac_multicast_enable;
 542                         } else {
 543                                 int i;
 544
 545                                 adapter->currentpacketfilter |=
 546                                     cmd_act_mac_multicast_enable;
 547
 548                                 adapter->nr_of_multicastmacaddr =
 549                                     wlan_copy_multicast_address(adapter, dev);
 550
 551                                 lbs_deb_net("multicast addresses: %d\n",
 552                                        dev->mc_count);
 553
 554                                 for (i = 0; i < dev->mc_count; i++) {
 555                                         lbs_deb_net("Multicast address %d:"
 556                                                MAC_FMT "\n", i,
 557                                                adapter->multicastlist[i][0],
 558                                                adapter->multicastlist[i][1],
 559                                                adapter->multicastlist[i][2],
 560                                                adapter->multicastlist[i][3],
 561                                                adapter->multicastlist[i][4],
 562                                                adapter->multicastlist[i][5]);
 563                                 }
 564                                 /* send multicast addresses to firmware */
 565                                 libertas_prepare_and_send_command(priv,
 566                                                       cmd_mac_multicast_adr,
 567                                                       cmd_act_set, 0, 0,
 568                                                       NULL);
 569                         }
 570                 }
 571         }
 572
 573         if (adapter->currentpacketfilter != oldpacketfilter) {
 574                 libertas_set_mac_packet_filter(priv);
 575         }
 576
 577         lbs_deb_leave(LBS_DEB_NET);
 578 }
 579
 580 /**
 581  *  @brief This function handles the major jobs in the WLAN driver.
 582  *  It handles all events generated by firmware, RX data received
 583  *  from firmware and TX data sent from kernel.
 584  *
 585  *  @param data    A pointer to wlan_thread structure
 586  *  @return        0
 587  */
 588 static int wlan_service_main_thread(void *data)
 589 {
 590         struct wlan_thread *thread = data;
 591         wlan_private *priv = thread->priv;
 592         wlan_adapter *adapter = priv->adapter;
 593         wait_queue_t wait;
 594         u8 ireg = 0;
 595
 596         lbs_deb_enter(LBS_DEB_THREAD);
 597
 598         wlan_activate_thread(thread);
 599
 600         init_waitqueue_entry(&wait, current);
 601
 602         for (;;) {
 603                 lbs_deb_thread( "main-thread 111: intcounter=%d "
 604                        "currenttxskb=%p dnld_sent=%d\n",
 605                        adapter->intcounter,
 606                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 607
 608                 add_wait_queue(&thread->waitq, &wait);
 609                 set_current_state(TASK_INTERRUPTIBLE);
 610                 spin_lock_irq(&adapter->driver_lock);
 611                 if ((adapter->psstate == PS_STATE_SLEEP) ||
 612                     (!adapter->intcounter
 613                      && (priv->wlan_dev.dnld_sent || adapter->cur_cmd ||
 614                          list_empty(&adapter->cmdpendingq)))) {
 615                         lbs_deb_thread(
 616                                "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
 617                                adapter->connect_status, adapter->intcounter,
 618                                adapter->psmode, adapter->psstate);
 619                         spin_unlock_irq(&adapter->driver_lock);
 620                         schedule();
 621                 } else
 622                         spin_unlock_irq(&adapter->driver_lock);
 623
 624
 625                 lbs_deb_thread(
 626                        "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
 627                        "dnld_sent=%d\n", adapter->intcounter,
 628                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 629
 630                 set_current_state(TASK_RUNNING);
 631                 remove_wait_queue(&thread->waitq, &wait);
 632                 try_to_freeze();
 633
 634                 lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
 635                        "dnld_sent=%d\n",
 636                        adapter->intcounter,
 637                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 638
 639                 if (kthread_should_stop()
 640                     || adapter->surpriseremoved) {
 641                         lbs_deb_thread(
 642                                "main-thread: break from main thread: surpriseremoved=0x%x\n",
 643                                adapter->surpriseremoved);
 644                         break;
 645                 }
 646
 647
 648                 spin_lock_irq(&adapter->driver_lock);
 649                 if (adapter->intcounter) {
 650                         u8 int_status;
 651                         adapter->intcounter = 0;
 652                         int_status = libertas_sbi_get_int_status(priv, &ireg);
 653
 654                         if (int_status) {
 655                                 lbs_deb_thread(
 656                                        "main-thread: reading HOST_INT_STATUS_REG failed\n");
 657                                 spin_unlock_irq(&adapter->driver_lock);
 658                                 continue;
 659                         }
 660                         adapter->hisregcpy |= ireg;
 661                 }
 662
 663                 lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
 664                        "dnld_sent=%d\n",
 665                        adapter->intcounter,
 666                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 667
 668                 /* command response? */
 669                 if (adapter->hisregcpy & his_cmdupldrdy) {
 670                         lbs_deb_thread("main-thread: cmd response ready\n");
 671
 672                         adapter->hisregcpy &= ~his_cmdupldrdy;
 673                         spin_unlock_irq(&adapter->driver_lock);
 674                         libertas_process_rx_command(priv);
 675                         spin_lock_irq(&adapter->driver_lock);
 676                 }
 677
 678                 /* Any Card Event */
 679                 if (adapter->hisregcpy & his_cardevent) {
 680                         lbs_deb_thread("main-thread: Card Event Activity\n");
 681
 682                         adapter->hisregcpy &= ~his_cardevent;
 683
 684                         if (libertas_sbi_read_event_cause(priv)) {
 685                                 lbs_pr_alert(
 686                                        "main-thread: libertas_sbi_read_event_cause failed\n");
 687                                 spin_unlock_irq(&adapter->driver_lock);
 688                                 continue;
 689                         }
 690                         spin_unlock_irq(&adapter->driver_lock);
 691                         libertas_process_event(priv);
 692                 } else
 693                         spin_unlock_irq(&adapter->driver_lock);
 694
 695                 /* Check if we need to confirm Sleep Request received previously */
 696                 if (adapter->psstate == PS_STATE_PRE_SLEEP) {
 697                         if (!priv->wlan_dev.dnld_sent && !adapter->cur_cmd) {
 698                                 if (adapter->connect_status ==
 699                                     libertas_connected) {
 700                                         lbs_deb_thread(
 701                                                "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
 702                                                "dnld_sent=%d cur_cmd=%p, confirm now\n",
 703                                                adapter->intcounter,
 704                                                adapter->currenttxskb,
 705                                                priv->wlan_dev.dnld_sent,
 706                                                adapter->cur_cmd);
 707
 708                                         libertas_ps_confirm_sleep(priv,
 709                                                        (u16) adapter->psmode);
 710                                 } else {
 711                                         /* workaround for firmware sending
 712                                          * deauth/linkloss event immediately
 713                                          * after sleep request, remove this
 714                                          * after firmware fixes it
 715                                          */
 716                                         adapter->psstate = PS_STATE_AWAKE;
 717                                         lbs_pr_alert(
 718                                                "main-thread: ignore PS_SleepConfirm in non-connected state\n");
 719                                 }
 720                         }
 721                 }
 722
 723                 /* The PS state is changed during processing of Sleep Request
 724                  * event above
 725                  */
 726                 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
 727                     (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
 728                         continue;
 729
 730                 /* Execute the next command */
 731                 if (!priv->wlan_dev.dnld_sent && !priv->adapter->cur_cmd)
 732                         libertas_execute_next_command(priv);
 733
 734                 /* Wake-up command waiters which can't sleep in
 735                  * libertas_prepare_and_send_command
 736                  */
 737                 if (!adapter->nr_cmd_pending)
 738                         wake_up_all(&adapter->cmd_pending);
 739
 740                 libertas_tx_runqueue(priv);
 741         }
 742
 743         del_timer(&adapter->command_timer);
 744         adapter->nr_cmd_pending = 0;
 745         wake_up_all(&adapter->cmd_pending);
 746         wlan_deactivate_thread(thread);
 747
 748         lbs_deb_leave(LBS_DEB_THREAD);
 749         return 0;
 750 }
 751
 752 /**
 753  * @brief This function adds the card. it will probe the
 754  * card, allocate the wlan_priv and initialize the device.
 755  *
 756  *  @param card    A pointer to card
 757  *  @return        A pointer to wlan_private structure
 758  */
 759 wlan_private *wlan_add_card(void *card)
 760 {
 761         struct net_device *dev = NULL;
 762         struct net_device *mesh_dev = NULL;
 763         wlan_private *priv = NULL;
 764
 765         lbs_deb_enter(LBS_DEB_NET);
 766
 767         /* Allocate an Ethernet device and register it */
 768         if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
 769                 lbs_pr_err("init ethX device failed\n");
 770                 return NULL;
 771         }
 772
 773         priv = dev->priv;
 774
 775         /* allocate buffer for wlan_adapter */
 776         if (!(priv->adapter = kmalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
 777                 lbs_pr_err("allocate buffer for wlan_adapter failed\n");
 778                 goto err_kmalloc;
 779         }
 780
 781         /* Allocate a virtual mesh device */
 782         if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
 783                 lbs_deb_mesh("init mshX device failed\n");
 784                 return NULL;
 785         }
 786
 787         /* Both intervaces share the priv structure */
 788         mesh_dev->priv = priv;
 789
 790         /* init wlan_adapter */
 791         memset(priv->adapter, 0, sizeof(wlan_adapter));
 792
 793         priv->wlan_dev.netdev = dev;
 794         priv->wlan_dev.card = card;
 795         priv->mesh_open = 0;
 796         priv->infra_open = 0;
 797         priv->mesh_dev = mesh_dev;
 798
 799         SET_MODULE_OWNER(dev);
 800         SET_MODULE_OWNER(mesh_dev);
 801
 802         /* Setup the OS Interface to our functions */
 803         dev->open = wlan_open;
 804         dev->hard_start_xmit = wlan_pre_start_xmit;
 805         dev->stop = wlan_close;
 806         dev->do_ioctl = libertas_do_ioctl;
 807         dev->set_mac_address = wlan_set_mac_address;
 808         mesh_dev->open = mesh_open;
 809         mesh_dev->hard_start_xmit = mesh_pre_start_xmit;
 810         mesh_dev->stop = mesh_close;
 811         mesh_dev->do_ioctl = libertas_do_ioctl;
 812         memcpy(mesh_dev->dev_addr, priv->wlan_dev.netdev->dev_addr,
 813                         sizeof(priv->wlan_dev.netdev->dev_addr));
 814
 815 #define WLAN_WATCHDOG_TIMEOUT   (5 * HZ)
 816
 817         dev->tx_timeout = wlan_tx_timeout;
 818         dev->get_stats = wlan_get_stats;
 819         dev->watchdog_timeo = WLAN_WATCHDOG_TIMEOUT;
 820         dev->ethtool_ops = &libertas_ethtool_ops;
 821         mesh_dev->get_stats = wlan_get_stats;
 822         mesh_dev->ethtool_ops = &libertas_ethtool_ops;
 823
 824 #ifdef  WIRELESS_EXT
 825         dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 826         mesh_dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 827 #endif
 828 #define NETIF_F_DYNALLOC 16
 829         dev->features |= NETIF_F_DYNALLOC;
 830         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 831         dev->set_multicast_list = wlan_set_multicast_list;
 832
 833         INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
 834         INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
 835
 836         spin_lock_init(&priv->adapter->driver_lock);
 837         init_waitqueue_head(&priv->adapter->cmd_pending);
 838         priv->adapter->nr_cmd_pending = 0;
 839
 840         lbs_deb_thread("Starting kthread...\n");
 841         priv->mainthread.priv = priv;
 842         wlan_create_thread(wlan_service_main_thread,
 843                            &priv->mainthread, "wlan_main_service");
 844
 845         priv->assoc_thread =
 846                 create_singlethread_workqueue("libertas_assoc");
 847         INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
 848
 849         /*
 850          * Register the device. Fillup the private data structure with
 851          * relevant information from the card and request for the required
 852          * IRQ.
 853          */
 854         if (libertas_sbi_register_dev(priv) < 0) {
 855                 lbs_pr_err("failed to register WLAN device\n");
 856                 goto err_registerdev;
 857         }
 858
 859         /* init FW and HW */
 860         if (libertas_init_fw(priv)) {
 861                 lbs_pr_err("firmware init failed\n");
 862                 goto err_registerdev;
 863         }
 864
 865         if (register_netdev(dev)) {
 866                 lbs_pr_err("cannot register ethX device\n");
 867                 goto err_init_fw;
 868         }
 869
 870         /* Register virtual mesh interface */
 871         if (register_netdev(mesh_dev)) {
 872                 lbs_pr_err("cannot register mshX virtual interface\n");
 873                 goto err_init_fw;
 874         }
 875
 876         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
 877
 878         libertas_debugfs_init_one(priv, dev);
 879
 880         if (libertas_found == MAX_DEVS)
 881                 goto err_init_fw;
 882         libertas_devs[libertas_found] = dev;
 883         libertas_found++;
 884         if (device_create_file(&(mesh_dev->dev), &dev_attr_libertas_mpp))
 885                 goto err_create_file;
 886
 887         lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
 888         return priv;
 889
 890 err_create_file:
 891         device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
 892 err_init_fw:
 893         libertas_sbi_unregister_dev(priv);
 894 err_registerdev:
 895         destroy_workqueue(priv->assoc_thread);
 896         /* Stop the thread servicing the interrupts */
 897         wake_up_interruptible(&priv->mainthread.waitq);
 898         wlan_terminate_thread(&priv->mainthread);
 899         kfree(priv->adapter);
 900 err_kmalloc:
 901         free_netdev(dev);
 902         free_netdev(mesh_dev);
 903
 904         lbs_deb_leave_args(LBS_DEB_NET, "priv NULL");
 905         return NULL;
 906 }
 907
 908 static void wake_pending_cmdnodes(wlan_private *priv)
 909 {
 910         struct cmd_ctrl_node *cmdnode;
 911         unsigned long flags;
 912
 913         lbs_deb_enter(LBS_DEB_CMD);
 914
 915         spin_lock_irqsave(&priv->adapter->driver_lock, flags);
 916         list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
 917                 cmdnode->cmdwaitqwoken = 1;
 918                 wake_up_interruptible(&cmdnode->cmdwait_q);
 919         }
 920         spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);
 921 }
 922
 923
 924 int wlan_remove_card(void *card)
 925 {
 926         wlan_private *priv = libertas_sbi_get_priv(card);
 927         wlan_adapter *adapter;
 928         struct net_device *dev;
 929         struct net_device *mesh_dev;
 930         union iwreq_data wrqu;
 931         int i;
 932
 933         lbs_deb_enter(LBS_DEB_NET);
 934
 935         if (!priv)
 936                 goto out;
 937
 938         adapter = priv->adapter;
 939
 940         if (!adapter)
 941                 goto out;
 942
 943         dev = priv->wlan_dev.netdev;
 944         mesh_dev = priv->mesh_dev;
 945
 946         netif_stop_queue(mesh_dev);
 947         netif_stop_queue(priv->wlan_dev.netdev);
 948         netif_carrier_off(priv->wlan_dev.netdev);
 949
 950         wake_pending_cmdnodes(priv);
 951
 952         device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
 953         unregister_netdev(mesh_dev);
 954         unregister_netdev(dev);
 955
 956         cancel_delayed_work(&priv->assoc_work);
 957         destroy_workqueue(priv->assoc_thread);
 958
 959         if (adapter->psmode == wlan802_11powermodemax_psp) {
 960                 adapter->psmode = wlan802_11powermodecam;
 961                 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
 962         }
 963
 964         memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
 965         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 966         wireless_send_event(priv->wlan_dev.netdev, SIOCGIWAP, &wrqu, NULL);
 967
 968         adapter->surpriseremoved = 1;
 969
 970         /* Stop the thread servicing the interrupts */
 971         wlan_terminate_thread(&priv->mainthread);
 972
 973         libertas_debugfs_remove_one(priv);
 974
 975         lbs_deb_net("free adapter\n");
 976         libertas_free_adapter(priv);
 977
 978         for (i = 0; i<libertas_found; i++) {
 979                 if (libertas_devs[i]==priv->wlan_dev.netdev) {
 980                         libertas_devs[i] = libertas_devs[--libertas_found];
 981                         libertas_devs[libertas_found] = NULL ;
 982                         break ;
 983                 }
 984         }
 985
 986         lbs_deb_net("unregister finish\n");
 987
 988         priv->wlan_dev.netdev = NULL;
 989         priv->mesh_dev = NULL ;
 990         free_netdev(mesh_dev);
 991         free_netdev(dev);
 992
 993 out:
 994         lbs_deb_leave(LBS_DEB_NET);
 995         return 0;
 996 }
 997
 998 /**
 999  *  @brief This function finds the CFP in
1000  *  region_cfp_table based on region and band parameter.
1001  *
1002  *  @param region  The region code
1003  *  @param band    The band
1004  *  @param cfp_no  A pointer to CFP number
1005  *  @return        A pointer to CFP
1006  */
1007 struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
1008 {
1009         int i, end;
1010
1011         lbs_deb_enter(LBS_DEB_MAIN);
1012
1013         end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
1014
1015         for (i = 0; i < end ; i++) {
1016                 lbs_deb_main("region_cfp_table[i].region=%d\n",
1017                         region_cfp_table[i].region);
1018                 if (region_cfp_table[i].region == region) {
1019                         *cfp_no = region_cfp_table[i].cfp_no_BG;
1020                         lbs_deb_leave(LBS_DEB_MAIN);
1021                         return region_cfp_table[i].cfp_BG;
1022                 }
1023         }
1024
1025         lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
1026         return NULL;
1027 }
1028
1029 int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
1030 {
1031         wlan_adapter *adapter = priv->adapter;
1032         int ret = 0;
1033         int i = 0;
1034
1035         struct chan_freq_power *cfp;
1036         int cfp_no;
1037
1038         lbs_deb_enter(LBS_DEB_MAIN);
1039
1040         memset(adapter->region_channel, 0, sizeof(adapter->region_channel));
1041
1042         {
1043                 cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
1044                 if (cfp != NULL) {
1045                         adapter->region_channel[i].nrcfp = cfp_no;
1046                         adapter->region_channel[i].CFP = cfp;
1047                 } else {
1048                         lbs_deb_main("wrong region code %#x in band B/G\n",
1049                                region);
1050                         ret = -1;
1051                         goto out;
1052                 }
1053                 adapter->region_channel[i].valid = 1;
1054                 adapter->region_channel[i].region = region;
1055                 adapter->region_channel[i].band = band;
1056                 i++;
1057         }
1058 out:
1059         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1060         return ret;
1061 }
1062
1063 /**
1064  *  @brief This function handles the interrupt. it will change PS
1065  *  state if applicable. it will wake up main_thread to handle
1066  *  the interrupt event as well.
1067  *
1068  *  @param dev     A pointer to net_device structure
1069  *  @return        n/a
1070  */
1071 void libertas_interrupt(struct net_device *dev)
1072 {
1073         wlan_private *priv = dev->priv;
1074
1075         lbs_deb_enter(LBS_DEB_MAIN);
1076
1077         lbs_deb_main("libertas_interrupt: intcounter=%d\n",
1078                priv->adapter->intcounter);
1079
1080         priv->adapter->intcounter++;
1081
1082         if (priv->adapter->psstate == PS_STATE_SLEEP) {
1083                 priv->adapter->psstate = PS_STATE_AWAKE;
1084                 netif_wake_queue(dev);
1085         }
1086
1087         wake_up_interruptible(&priv->mainthread.waitq);
1088
1089         lbs_deb_leave(LBS_DEB_MAIN);
1090 }
1091
1092 static int wlan_init_module(void)
1093 {
1094         int ret = 0;
1095
1096         lbs_deb_enter(LBS_DEB_MAIN);
1097
1098         if (libertas_fw_name == NULL) {
1099                 libertas_fw_name = default_fw_name;
1100         }
1101
1102         libertas_debugfs_init();
1103
1104         if (libertas_sbi_register()) {
1105                 ret = -1;
1106                 libertas_debugfs_remove();
1107         }
1108
1109         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1110         return ret;
1111 }
1112
1113 static void wlan_cleanup_module(void)
1114 {
1115         int i;
1116
1117         lbs_deb_enter(LBS_DEB_MAIN);
1118
1119         for (i = 0; i<libertas_found; i++) {
1120                 wlan_private *priv = libertas_devs[i]->priv;
1121                 reset_device(priv);
1122         }
1123
1124         libertas_sbi_unregister();
1125         libertas_debugfs_remove();
1126
1127         lbs_deb_leave(LBS_DEB_MAIN);
1128 }
1129
1130 module_init(wlan_init_module);
1131 module_exit(wlan_cleanup_module);
1132
1133 MODULE_DESCRIPTION("M-WLAN Driver");
1134 MODULE_AUTHOR("Marvell International Ltd.");
1135 MODULE_LICENSE("GPL");