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

   1 /**
   2   * This file contains the major functions in WLAN
   3   * driver. It includes init, exit, open, close and main
   4   * thread etc..
   5   */
   6
   7 #include <linux/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
  15 #include "host.h"
  16 #include "sbi.h"
  17 #include "decl.h"
  18 #include "dev.h"
  19 #include "fw.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 #define WLAN_TX_PWR_DEFAULT             20      /*100mW */
  32 #define WLAN_TX_PWR_US_DEFAULT          20      /*100mW */
  33 #define WLAN_TX_PWR_JP_DEFAULT          16      /*50mW */
  34 #define WLAN_TX_PWR_FR_DEFAULT          20      /*100mW */
  35 #define WLAN_TX_PWR_EMEA_DEFAULT        20      /*100mW */
  36
  37 /* Format { channel, frequency (MHz), maxtxpower } */
  38 /* band: 'B/G', region: USA FCC/Canada IC */
  39 static struct chan_freq_power channel_freq_power_US_BG[] = {
  40         {1, 2412, WLAN_TX_PWR_US_DEFAULT},
  41         {2, 2417, WLAN_TX_PWR_US_DEFAULT},
  42         {3, 2422, WLAN_TX_PWR_US_DEFAULT},
  43         {4, 2427, WLAN_TX_PWR_US_DEFAULT},
  44         {5, 2432, WLAN_TX_PWR_US_DEFAULT},
  45         {6, 2437, WLAN_TX_PWR_US_DEFAULT},
  46         {7, 2442, WLAN_TX_PWR_US_DEFAULT},
  47         {8, 2447, WLAN_TX_PWR_US_DEFAULT},
  48         {9, 2452, WLAN_TX_PWR_US_DEFAULT},
  49         {10, 2457, WLAN_TX_PWR_US_DEFAULT},
  50         {11, 2462, WLAN_TX_PWR_US_DEFAULT}
  51 };
  52
  53 /* band: 'B/G', region: Europe ETSI */
  54 static struct chan_freq_power channel_freq_power_EU_BG[] = {
  55         {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
  56         {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
  57         {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
  58         {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
  59         {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
  60         {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
  61         {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
  62         {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
  63         {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
  64         {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
  65         {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
  66         {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
  67         {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
  68 };
  69
  70 /* band: 'B/G', region: Spain */
  71 static struct chan_freq_power channel_freq_power_SPN_BG[] = {
  72         {10, 2457, WLAN_TX_PWR_DEFAULT},
  73         {11, 2462, WLAN_TX_PWR_DEFAULT}
  74 };
  75
  76 /* band: 'B/G', region: France */
  77 static struct chan_freq_power channel_freq_power_FR_BG[] = {
  78         {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
  79         {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
  80         {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
  81         {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
  82 };
  83
  84 /* band: 'B/G', region: Japan */
  85 static struct chan_freq_power channel_freq_power_JPN_BG[] = {
  86         {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
  87         {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
  88         {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
  89         {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
  90         {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
  91         {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
  92         {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
  93         {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
  94         {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
  95         {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
  96         {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
  97         {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
  98         {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
  99         {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
 100 };
 101
 102 /**
 103  * the structure for channel, frequency and power
 104  */
 105 struct region_cfp_table {
 106         u8 region;
 107         struct chan_freq_power *cfp_BG;
 108         int cfp_no_BG;
 109 };
 110
 111 /**
 112  * the structure for the mapping between region and CFP
 113  */
 114 static struct region_cfp_table region_cfp_table[] = {
 115         {0x10,                  /*US FCC */
 116          channel_freq_power_US_BG,
 117          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 118          }
 119         ,
 120         {0x20,                  /*CANADA IC */
 121          channel_freq_power_US_BG,
 122          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
 123          }
 124         ,
 125         {0x30, /*EU*/ channel_freq_power_EU_BG,
 126          sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
 127          }
 128         ,
 129         {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
 130          sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
 131          }
 132         ,
 133         {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
 134          sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
 135          }
 136         ,
 137         {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
 138          sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
 139          }
 140         ,
 141 /*Add new region here */
 142 };
 143
 144 /**
 145  * the rates supported
 146  */
 147 u8 libertas_supported_rates[G_SUPPORTED_RATES] =
 148     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
 149 0 };
 150
 151 /**
 152  * the rates supported for ad-hoc G mode
 153  */
 154 u8 libertas_adhoc_rates_g[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 B mode
 160  */
 161 u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
 162
 163 #define MAX_DEVS 5
 164 static struct net_device *libertas_devs[MAX_DEVS];
 165 static int libertas_found = 0;
 166
 167 /**
 168  * the table to keep region code
 169  */
 170 u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
 171     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
 172
 173 static u8 *default_fw_name = "usb8388.bin";
 174
 175 /**
 176  * Attributes exported through sysfs
 177  */
 178
 179 /**
 180  * @brief Get function for sysfs attribute libertas_mpp
 181  */
 182 static ssize_t libertas_mpp_get(struct device * dev,
 183                 struct device_attribute *attr, char * buf) {
 184         struct cmd_ds_mesh_access mesh_access;
 185
 186         memset(&mesh_access, 0, sizeof(mesh_access));
 187         libertas_prepare_and_send_command(to_net_dev(dev)->priv,
 188                         cmd_mesh_access,
 189                         cmd_act_mesh_get_mpp,
 190                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
 191
 192         return snprintf(buf, 3, "%d\n", mesh_access.data[0]);
 193 }
 194
 195 /**
 196  * @brief Set function for sysfs attribute libertas_mpp
 197  */
 198 static ssize_t libertas_mpp_set(struct device * dev,
 199                 struct device_attribute *attr, const char * buf, size_t count) {
 200         struct cmd_ds_mesh_access mesh_access;
 201
 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         wlan_private *priv = (wlan_private *) dev->priv;
 232         wlan_adapter *adapter = priv->adapter;
 233         int i = 0;
 234
 235         while (!adapter->fw_ready && i < 20) {
 236                 i++;
 237                 msleep_interruptible(100);
 238         }
 239         if (!adapter->fw_ready) {
 240                 lbs_pr_info("FW not ready, pre_open_check() return failure\n");
 241                 LEAVE();
 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         ENTER();
 260
 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         LEAVE();
 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         ENTER();
 315
 316         netif_carrier_off(priv->wlan_dev.netdev);
 317         priv->open = 0;
 318
 319         LEAVE();
 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         ENTER();
 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         LEAVE();
 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         ENTER();
 388         SET_MESH_FRAME(skb);
 389         LEAVE();
 390
 391         return wlan_hard_start_xmit(skb, priv->wlan_dev.netdev);
 392 }
 393
 394 /**
 395  * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
 396  *
 397  */
 398 static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev) {
 399         ENTER();
 400         UNSET_MESH_FRAME(skb);
 401         LEAVE();
 402         return wlan_hard_start_xmit(skb, dev);
 403 }
 404
 405 static void wlan_tx_timeout(struct net_device *dev)
 406 {
 407         wlan_private *priv = (wlan_private *) dev->priv;
 408
 409         ENTER();
 410
 411         lbs_pr_err("tx watch dog timeout!\n");
 412
 413         priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
 414         dev->trans_start = jiffies;
 415
 416         if (priv->adapter->currenttxskb) {
 417                 if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
 418                         /* If we are here, we have not received feedback from
 419                            the previous packet.  Assume TX_FAIL and move on. */
 420                         priv->adapter->eventcause = 0x01000000;
 421                         libertas_send_tx_feedback(priv);
 422                 } else
 423                         wake_up_interruptible(&priv->mainthread.waitq);
 424         } else if (priv->adapter->connect_status == libertas_connected)
 425                 netif_wake_queue(priv->wlan_dev.netdev);
 426
 427         LEAVE();
 428 }
 429
 430 /**
 431  *  @brief This function returns the network statistics
 432  *
 433  *  @param dev     A pointer to wlan_private structure
 434  *  @return        A pointer to net_device_stats structure
 435  */
 436 static struct net_device_stats *wlan_get_stats(struct net_device *dev)
 437 {
 438         wlan_private *priv = (wlan_private *) dev->priv;
 439
 440         return &priv->stats;
 441 }
 442
 443 static int wlan_set_mac_address(struct net_device *dev, void *addr)
 444 {
 445         int ret = 0;
 446         wlan_private *priv = (wlan_private *) dev->priv;
 447         wlan_adapter *adapter = priv->adapter;
 448         struct sockaddr *phwaddr = addr;
 449
 450         ENTER();
 451
 452         memset(adapter->current_addr, 0, ETH_ALEN);
 453
 454         /* dev->dev_addr is 8 bytes */
 455         lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
 456
 457         lbs_dbg_hex("addr:", phwaddr->sa_data, ETH_ALEN);
 458         memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);
 459
 460         ret = libertas_prepare_and_send_command(priv, cmd_802_11_mac_address,
 461                                     cmd_act_set,
 462                                     cmd_option_waitforrsp, 0, NULL);
 463
 464         if (ret) {
 465                 lbs_pr_debug(1, "set mac address failed.\n");
 466                 ret = -1;
 467                 goto done;
 468         }
 469
 470         lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
 471         memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
 472         memcpy(((wlan_private *) dev->priv)->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
 473
 474 done:
 475         LEAVE();
 476         return ret;
 477 }
 478
 479 static int wlan_copy_multicast_address(wlan_adapter * adapter,
 480                                      struct net_device *dev)
 481 {
 482         int i = 0;
 483         struct dev_mc_list *mcptr = dev->mc_list;
 484
 485         for (i = 0; i < dev->mc_count; i++) {
 486                 memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
 487                 mcptr = mcptr->next;
 488         }
 489
 490         return i;
 491
 492 }
 493
 494 static void wlan_set_multicast_list(struct net_device *dev)
 495 {
 496         wlan_private *priv = dev->priv;
 497         wlan_adapter *adapter = priv->adapter;
 498         int oldpacketfilter;
 499
 500         ENTER();
 501
 502         oldpacketfilter = adapter->currentpacketfilter;
 503
 504         if (dev->flags & IFF_PROMISC) {
 505                 lbs_pr_debug(1, "enable Promiscuous mode\n");
 506                 adapter->currentpacketfilter |=
 507                     cmd_act_mac_promiscuous_enable;
 508                 adapter->currentpacketfilter &=
 509                     ~(cmd_act_mac_all_multicast_enable |
 510                       cmd_act_mac_multicast_enable);
 511         } else {
 512                 /* Multicast */
 513                 adapter->currentpacketfilter &=
 514                     ~cmd_act_mac_promiscuous_enable;
 515
 516                 if (dev->flags & IFF_ALLMULTI || dev->mc_count >
 517                     MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 518                         lbs_pr_debug(1, "Enabling All Multicast!\n");
 519                         adapter->currentpacketfilter |=
 520                             cmd_act_mac_all_multicast_enable;
 521                         adapter->currentpacketfilter &=
 522                             ~cmd_act_mac_multicast_enable;
 523                 } else {
 524                         adapter->currentpacketfilter &=
 525                             ~cmd_act_mac_all_multicast_enable;
 526
 527                         if (!dev->mc_count) {
 528                                 lbs_pr_debug(1, "No multicast addresses - "
 529                                        "disabling multicast!\n");
 530                                 adapter->currentpacketfilter &=
 531                                     ~cmd_act_mac_multicast_enable;
 532                         } else {
 533                                 int i;
 534
 535                                 adapter->currentpacketfilter |=
 536                                     cmd_act_mac_multicast_enable;
 537
 538                                 adapter->nr_of_multicastmacaddr =
 539                                     wlan_copy_multicast_address(adapter, dev);
 540
 541                                 lbs_pr_debug(1, "Multicast addresses: %d\n",
 542                                        dev->mc_count);
 543
 544                                 for (i = 0; i < dev->mc_count; i++) {
 545                                         lbs_pr_debug(1, "Multicast address %d:"
 546                                                "%x %x %x %x %x %x\n", i,
 547                                                adapter->multicastlist[i][0],
 548                                                adapter->multicastlist[i][1],
 549                                                adapter->multicastlist[i][2],
 550                                                adapter->multicastlist[i][3],
 551                                                adapter->multicastlist[i][4],
 552                                                adapter->multicastlist[i][5]);
 553                                 }
 554                                 /* set multicast addresses to firmware */
 555                                 libertas_prepare_and_send_command(priv,
 556                                                       cmd_mac_multicast_adr,
 557                                                       cmd_act_set, 0, 0,
 558                                                       NULL);
 559                         }
 560                 }
 561         }
 562
 563         if (adapter->currentpacketfilter != oldpacketfilter) {
 564                 libertas_set_mac_packet_filter(priv);
 565         }
 566
 567         LEAVE();
 568 }
 569
 570 /**
 571  *  @brief This function hanldes the major job in WLAN driver.
 572  *  it handles the event generated by firmware, rx data received
 573  *  from firmware and tx data sent from kernel.
 574  *
 575  *  @param data    A pointer to wlan_thread structure
 576  *  @return        0
 577  */
 578 static int wlan_service_main_thread(void *data)
 579 {
 580         struct wlan_thread *thread = data;
 581         wlan_private *priv = thread->priv;
 582         wlan_adapter *adapter = priv->adapter;
 583         wait_queue_t wait;
 584         u8 ireg = 0;
 585
 586         ENTER();
 587
 588         wlan_activate_thread(thread);
 589
 590         init_waitqueue_entry(&wait, current);
 591
 592         for (;;) {
 593                 lbs_pr_debug(1, "main-thread 111: intcounter=%d "
 594                        "currenttxskb=%p dnld_sent=%d\n",
 595                        adapter->intcounter,
 596                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 597
 598                 add_wait_queue(&thread->waitq, &wait);
 599                 set_current_state(TASK_INTERRUPTIBLE);
 600                 spin_lock_irq(&adapter->driver_lock);
 601                 if ((adapter->psstate == PS_STATE_SLEEP) ||
 602                     (!adapter->intcounter
 603                      && (priv->wlan_dev.dnld_sent || adapter->cur_cmd ||
 604                          list_empty(&adapter->cmdpendingq)))) {
 605                         lbs_pr_debug(1,
 606                                "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
 607                                adapter->connect_status, adapter->intcounter,
 608                                adapter->psmode, adapter->psstate);
 609                         spin_unlock_irq(&adapter->driver_lock);
 610                         schedule();
 611                 } else
 612                         spin_unlock_irq(&adapter->driver_lock);
 613
 614
 615                 lbs_pr_debug(1,
 616                        "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
 617                        "dnld_sent=%d\n", adapter->intcounter,
 618                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 619
 620                 set_current_state(TASK_RUNNING);
 621                 remove_wait_queue(&thread->waitq, &wait);
 622                 try_to_freeze();
 623
 624                 lbs_pr_debug(1, "main-thread 333: intcounter=%d currenttxskb=%p "
 625                        "dnld_sent=%d\n",
 626                        adapter->intcounter,
 627                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 628
 629                 if (kthread_should_stop()
 630                     || adapter->surpriseremoved) {
 631                         lbs_pr_debug(1,
 632                                "main-thread: break from main thread: surpriseremoved=0x%x\n",
 633                                adapter->surpriseremoved);
 634                         break;
 635                 }
 636
 637
 638                 spin_lock_irq(&adapter->driver_lock);
 639                 if (adapter->intcounter) {
 640                         u8 int_status;
 641                         adapter->intcounter = 0;
 642                         int_status = libertas_sbi_get_int_status(priv, &ireg);
 643
 644                         if (int_status) {
 645                                 lbs_pr_debug(1,
 646                                        "main-thread: reading HOST_INT_STATUS_REG failed\n");
 647                                 spin_unlock_irq(&adapter->driver_lock);
 648                                 continue;
 649                         }
 650                         adapter->hisregcpy |= ireg;
 651                 }
 652
 653                 lbs_pr_debug(1, "main-thread 444: intcounter=%d currenttxskb=%p "
 654                        "dnld_sent=%d\n",
 655                        adapter->intcounter,
 656                        adapter->currenttxskb, priv->wlan_dev.dnld_sent);
 657
 658                 /* command response? */
 659                 if (adapter->hisregcpy & his_cmdupldrdy) {
 660                         lbs_pr_debug(1, "main-thread: cmd response ready.\n");
 661
 662                         adapter->hisregcpy &= ~his_cmdupldrdy;
 663                         spin_unlock_irq(&adapter->driver_lock);
 664                         libertas_process_rx_command(priv);
 665                         spin_lock_irq(&adapter->driver_lock);
 666                 }
 667
 668                 /* Any Card Event */
 669                 if (adapter->hisregcpy & his_cardevent) {
 670                         lbs_pr_debug(1, "main-thread: Card Event Activity.\n");
 671
 672                         adapter->hisregcpy &= ~his_cardevent;
 673
 674                         if (libertas_sbi_read_event_cause(priv)) {
 675                                 lbs_pr_alert(
 676                                        "main-thread: libertas_sbi_read_event_cause failed.\n");
 677                                 spin_unlock_irq(&adapter->driver_lock);
 678                                 continue;
 679                         }
 680                         spin_unlock_irq(&adapter->driver_lock);
 681                         libertas_process_event(priv);
 682                 } else
 683                         spin_unlock_irq(&adapter->driver_lock);
 684
 685                 /* Check if we need to confirm Sleep Request received previously */
 686                 if (adapter->psstate == PS_STATE_PRE_SLEEP) {
 687                         if (!priv->wlan_dev.dnld_sent && !adapter->cur_cmd) {
 688                                 if (adapter->connect_status ==
 689                                     libertas_connected) {
 690                                         lbs_pr_debug(1,
 691                                                "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
 692                                                "dnld_sent=%d cur_cmd=%p, confirm now\n",
 693                                                adapter->intcounter,
 694                                                adapter->currenttxskb,
 695                                                priv->wlan_dev.dnld_sent,
 696                                                adapter->cur_cmd);
 697
 698                                         libertas_ps_confirm_sleep(priv,
 699                                                        (u16) adapter->psmode);
 700                                 } else {
 701                                         /* workaround for firmware sending
 702                                          * deauth/linkloss event immediately
 703                                          * after sleep request, remove this
 704                                          * after firmware fixes it
 705                                          */
 706                                         adapter->psstate = PS_STATE_AWAKE;
 707                                         lbs_pr_alert(
 708                                                "main-thread: ignore PS_SleepConfirm in non-connected state\n");
 709                                 }
 710                         }
 711                 }
 712
 713                 /* The PS state is changed during processing of Sleep Request
 714                  * event above
 715                  */
 716                 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
 717                     (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
 718                         continue;
 719
 720                 /* Execute the next command */
 721                 if (!priv->wlan_dev.dnld_sent && !priv->adapter->cur_cmd)
 722                         libertas_execute_next_command(priv);
 723
 724                 /* Wake-up command waiters which can't sleep in
 725                  * libertas_prepare_and_send_command
 726                  */
 727                 if (!adapter->nr_cmd_pending)
 728                         wake_up_all(&adapter->cmd_pending);
 729
 730                 libertas_tx_runqueue(priv);
 731         }
 732
 733         del_timer(&adapter->command_timer);
 734         adapter->nr_cmd_pending = 0;
 735         wake_up_all(&adapter->cmd_pending);
 736         wlan_deactivate_thread(thread);
 737
 738         LEAVE();
 739         return 0;
 740 }
 741
 742 /**
 743  * @brief This function adds the card. it will probe the
 744  * card, allocate the wlan_priv and initialize the device.
 745  *
 746  *  @param card    A pointer to card
 747  *  @return        A pointer to wlan_private structure
 748  */
 749 wlan_private *wlan_add_card(void *card)
 750 {
 751         struct net_device *dev = NULL;
 752         struct net_device *mesh_dev = NULL;
 753         wlan_private *priv = NULL;
 754
 755         ENTER();
 756
 757         /* Allocate an Ethernet device and register it */
 758         if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
 759                 lbs_pr_alert( "Init ethernet device failed!\n");
 760                 return NULL;
 761         }
 762
 763         priv = dev->priv;
 764
 765         /* allocate buffer for wlan_adapter */
 766         if (!(priv->adapter = kmalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
 767                 lbs_pr_alert( "Allocate buffer for wlan_adapter failed!\n");
 768                 goto err_kmalloc;
 769         }
 770
 771         /* Allocate a virtual mesh device */
 772         if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
 773                 lbs_pr_debug(1, "Init ethernet device failed!\n");
 774                 return NULL;
 775         }
 776
 777         /* Both intervaces share the priv structure */
 778         mesh_dev->priv = priv;
 779
 780         /* init wlan_adapter */
 781         memset(priv->adapter, 0, sizeof(wlan_adapter));
 782
 783         priv->wlan_dev.netdev = dev;
 784         priv->wlan_dev.card = card;
 785         priv->mesh_open = 0;
 786         priv->infra_open = 0;
 787         priv->mesh_dev = mesh_dev;
 788
 789         SET_MODULE_OWNER(dev);
 790         SET_MODULE_OWNER(mesh_dev);
 791
 792         /* Setup the OS Interface to our functions */
 793         dev->open = wlan_open;
 794         dev->hard_start_xmit = wlan_pre_start_xmit;
 795         dev->stop = wlan_close;
 796         dev->do_ioctl = libertas_do_ioctl;
 797         dev->set_mac_address = wlan_set_mac_address;
 798         mesh_dev->open = mesh_open;
 799         mesh_dev->hard_start_xmit = mesh_pre_start_xmit;
 800         mesh_dev->stop = mesh_close;
 801         mesh_dev->do_ioctl = libertas_do_ioctl;
 802         memcpy(mesh_dev->dev_addr, priv->wlan_dev.netdev->dev_addr,
 803                         sizeof(priv->wlan_dev.netdev->dev_addr));
 804
 805 #define WLAN_WATCHDOG_TIMEOUT   (5 * HZ)
 806
 807         dev->tx_timeout = wlan_tx_timeout;
 808         dev->get_stats = wlan_get_stats;
 809         dev->watchdog_timeo = WLAN_WATCHDOG_TIMEOUT;
 810         dev->ethtool_ops = &libertas_ethtool_ops;
 811         mesh_dev->get_stats = wlan_get_stats;
 812         mesh_dev->ethtool_ops = &libertas_ethtool_ops;
 813
 814 #ifdef  WIRELESS_EXT
 815         dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 816         mesh_dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
 817 #endif
 818 #define NETIF_F_DYNALLOC 16
 819         dev->features |= NETIF_F_DYNALLOC;
 820         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 821         dev->set_multicast_list = wlan_set_multicast_list;
 822
 823         INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
 824         INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
 825
 826         spin_lock_init(&priv->adapter->driver_lock);
 827         init_waitqueue_head(&priv->adapter->cmd_pending);
 828         priv->adapter->nr_cmd_pending = 0;
 829
 830         lbs_pr_debug(1, "Starting kthread...\n");
 831         priv->mainthread.priv = priv;
 832         wlan_create_thread(wlan_service_main_thread,
 833                            &priv->mainthread, "wlan_main_service");
 834
 835         priv->assoc_thread =
 836                 create_singlethread_workqueue("libertas_assoc");
 837         INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
 838
 839         /*
 840          * Register the device. Fillup the private data structure with
 841          * relevant information from the card and request for the required
 842          * IRQ.
 843          */
 844         if (libertas_sbi_register_dev(priv) < 0) {
 845                 lbs_pr_info("failed to register wlan device!\n");
 846                 goto err_registerdev;
 847         }
 848
 849         /* init FW and HW */
 850         if (libertas_init_fw(priv)) {
 851                 lbs_pr_debug(1, "Firmware Init failed\n");
 852                 goto err_registerdev;
 853         }
 854
 855         if (register_netdev(dev)) {
 856                 lbs_pr_err("Cannot register network device!\n");
 857                 goto err_init_fw;
 858         }
 859
 860         /* Register virtual mesh interface */
 861         if (register_netdev(mesh_dev)) {
 862                 lbs_pr_info("Cannot register mesh virtual interface!\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         if (libertas_found == MAX_DEVS)
 871                 goto err_init_fw;
 872         libertas_devs[libertas_found] = dev;
 873         libertas_found++;
 874         if (device_create_file(&(mesh_dev->dev), &dev_attr_libertas_mpp))
 875                 goto err_create_file;
 876
 877         LEAVE();
 878         return priv;
 879
 880 err_create_file:
 881         device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
 882 err_init_fw:
 883         libertas_sbi_unregister_dev(priv);
 884 err_registerdev:
 885         destroy_workqueue(priv->assoc_thread);
 886         /* Stop the thread servicing the interrupts */
 887         wake_up_interruptible(&priv->mainthread.waitq);
 888         wlan_terminate_thread(&priv->mainthread);
 889         kfree(priv->adapter);
 890 err_kmalloc:
 891         free_netdev(dev);
 892         free_netdev(mesh_dev);
 893
 894         LEAVE();
 895         return NULL;
 896 }
 897
 898 static void wake_pending_cmdnodes(wlan_private *priv)
 899 {
 900         struct cmd_ctrl_node *cmdnode;
 901         unsigned long flags;
 902
 903         spin_lock_irqsave(&priv->adapter->driver_lock, flags);
 904         list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
 905                 cmdnode->cmdwaitqwoken = 1;
 906                 wake_up_interruptible(&cmdnode->cmdwait_q);
 907         }
 908         spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);
 909 }
 910
 911
 912 int wlan_remove_card(void *card)
 913 {
 914         wlan_private *priv = libertas_sbi_get_priv(card);
 915         wlan_adapter *adapter;
 916         struct net_device *dev;
 917         struct net_device *mesh_dev;
 918         union iwreq_data wrqu;
 919         int i;
 920
 921         ENTER();
 922
 923         if (!priv) {
 924                 LEAVE();
 925                 return 0;
 926         }
 927
 928         adapter = priv->adapter;
 929
 930         if (!adapter) {
 931                 LEAVE();
 932                 return 0;
 933         }
 934
 935         dev = priv->wlan_dev.netdev;
 936         mesh_dev = priv->mesh_dev;
 937
 938         netif_stop_queue(mesh_dev);
 939         netif_stop_queue(priv->wlan_dev.netdev);
 940         netif_carrier_off(priv->wlan_dev.netdev);
 941
 942         wake_pending_cmdnodes(priv);
 943
 944         device_remove_file(&(mesh_dev->dev), &dev_attr_libertas_mpp);
 945         unregister_netdev(mesh_dev);
 946         unregister_netdev(dev);
 947
 948         cancel_delayed_work(&priv->assoc_work);
 949         destroy_workqueue(priv->assoc_thread);
 950
 951         if (adapter->psmode == wlan802_11powermodemax_psp) {
 952                 adapter->psmode = wlan802_11powermodecam;
 953                 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
 954         }
 955
 956         memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
 957         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 958         wireless_send_event(priv->wlan_dev.netdev, SIOCGIWAP, &wrqu, NULL);
 959
 960         adapter->surpriseremoved = 1;
 961
 962         /* Stop the thread servicing the interrupts */
 963         wlan_terminate_thread(&priv->mainthread);
 964
 965         libertas_debugfs_remove_one(priv);
 966
 967         lbs_pr_debug(1, "Free adapter\n");
 968         libertas_free_adapter(priv);
 969
 970         for (i = 0; i<libertas_found; i++) {
 971                 if (libertas_devs[i]==priv->wlan_dev.netdev) {
 972                         libertas_devs[i] = libertas_devs[--libertas_found];
 973                         libertas_devs[libertas_found] = NULL ;
 974                         break ;
 975                 }
 976         }
 977
 978         lbs_pr_debug(1, "Unregister finish\n");
 979
 980         priv->wlan_dev.netdev = NULL;
 981         priv->mesh_dev = NULL ;
 982         free_netdev(mesh_dev);
 983         free_netdev(dev);
 984
 985         LEAVE();
 986         return 0;
 987 }
 988
 989 /**
 990  *  @brief This function finds the CFP in
 991  *  region_cfp_table based on region and band parameter.
 992  *
 993  *  @param region  The region code
 994  *  @param band    The band
 995  *  @param cfp_no  A pointer to CFP number
 996  *  @return        A pointer to CFP
 997  */
 998 struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
 999 {
1000         int i, end;
1001
1002         ENTER();
1003
1004         end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
1005
1006         for (i = 0; i < end ; i++) {
1007                 lbs_pr_debug(1, "region_cfp_table[i].region=%d\n",
1008                         region_cfp_table[i].region);
1009                 if (region_cfp_table[i].region == region) {
1010                         *cfp_no = region_cfp_table[i].cfp_no_BG;
1011                         LEAVE();
1012                         return region_cfp_table[i].cfp_BG;
1013                 }
1014         }
1015
1016         LEAVE();
1017         return NULL;
1018 }
1019
1020 int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
1021 {
1022         wlan_adapter *adapter = priv->adapter;
1023         int i = 0;
1024
1025         struct chan_freq_power *cfp;
1026         int cfp_no;
1027
1028         ENTER();
1029
1030         memset(adapter->region_channel, 0, sizeof(adapter->region_channel));
1031
1032         {
1033                 cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
1034                 if (cfp != NULL) {
1035                         adapter->region_channel[i].nrcfp = cfp_no;
1036                         adapter->region_channel[i].CFP = cfp;
1037                 } else {
1038                         lbs_pr_debug(1, "wrong region code %#x in band B-G\n",
1039                                region);
1040                         return -1;
1041                 }
1042                 adapter->region_channel[i].valid = 1;
1043                 adapter->region_channel[i].region = region;
1044                 adapter->region_channel[i].band = band;
1045                 i++;
1046         }
1047         LEAVE();
1048         return 0;
1049 }
1050
1051 /**
1052  *  @brief This function handles the interrupt. it will change PS
1053  *  state if applicable. it will wake up main_thread to handle
1054  *  the interrupt event as well.
1055  *
1056  *  @param dev     A pointer to net_device structure
1057  *  @return        n/a
1058  */
1059 void libertas_interrupt(struct net_device *dev)
1060 {
1061         wlan_private *priv = dev->priv;
1062
1063         ENTER();
1064
1065         lbs_pr_debug(1, "libertas_interrupt: intcounter=%d\n",
1066                priv->adapter->intcounter);
1067
1068         priv->adapter->intcounter++;
1069
1070         if (priv->adapter->psstate == PS_STATE_SLEEP) {
1071                 priv->adapter->psstate = PS_STATE_AWAKE;
1072                 netif_wake_queue(dev);
1073         }
1074
1075         wake_up_interruptible(&priv->mainthread.waitq);
1076
1077         LEAVE();
1078 }
1079
1080 static int wlan_init_module(void)
1081 {
1082         int ret = 0;
1083
1084         ENTER();
1085
1086         if (libertas_fw_name == NULL) {
1087                 libertas_fw_name = default_fw_name;
1088         }
1089
1090         libertas_debugfs_init();
1091
1092         if (libertas_sbi_register()) {
1093                 ret = -1;
1094                 libertas_debugfs_remove();
1095                 goto done;
1096         }
1097
1098 done:
1099         LEAVE();
1100         return ret;
1101 }
1102
1103 static void wlan_cleanup_module(void)
1104 {
1105         int i;
1106
1107         ENTER();
1108
1109         for (i = 0; i<libertas_found; i++) {
1110                 wlan_private *priv = libertas_devs[i]->priv;
1111                 reset_device(priv);
1112         }
1113
1114         libertas_sbi_unregister();
1115         libertas_debugfs_remove();
1116
1117         LEAVE();
1118 }
1119
1120 module_init(wlan_init_module);
1121 module_exit(wlan_cleanup_module);
1122
1123 MODULE_DESCRIPTION("M-WLAN Driver");
1124 MODULE_AUTHOR("Marvell International Ltd.");
1125 MODULE_LICENSE("GPL");