drivers/net/wireless/libertas_tf/main.c

   1 /*
   2  *  Copyright (C) 2008, cozybit Inc.
   3  *  Copyright (C) 2003-2006, Marvell International Ltd.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or (at
   8  *  your option) any later version.
   9  */
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/hardirq.h>
  13 #include <linux/slab.h>
  14
  15 #include <linux/etherdevice.h>
  16 #include "libertas_tf.h"
  17
  18 #define DRIVER_RELEASE_VERSION "004.p0"
  19 /* thinfirm version: 5.132.X.pX */
  20 #define LBTF_FW_VER_MIN         0x05840300
  21 #define LBTF_FW_VER_MAX         0x0584ffff
  22 #define QOS_CONTROL_LEN         2
  23
  24 /* Module parameters */
  25 unsigned int lbtf_debug;
  26 EXPORT_SYMBOL_GPL(lbtf_debug);
  27 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
  28
  29 static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION
  30 #ifdef DEBUG
  31         "-dbg"
  32 #endif
  33         "";
  34
  35 struct workqueue_struct *lbtf_wq;
  36
  37 static const struct ieee80211_channel lbtf_channels[] = {
  38         { .center_freq = 2412, .hw_value = 1 },
  39         { .center_freq = 2417, .hw_value = 2 },
  40         { .center_freq = 2422, .hw_value = 3 },
  41         { .center_freq = 2427, .hw_value = 4 },
  42         { .center_freq = 2432, .hw_value = 5 },
  43         { .center_freq = 2437, .hw_value = 6 },
  44         { .center_freq = 2442, .hw_value = 7 },
  45         { .center_freq = 2447, .hw_value = 8 },
  46         { .center_freq = 2452, .hw_value = 9 },
  47         { .center_freq = 2457, .hw_value = 10 },
  48         { .center_freq = 2462, .hw_value = 11 },
  49         { .center_freq = 2467, .hw_value = 12 },
  50         { .center_freq = 2472, .hw_value = 13 },
  51         { .center_freq = 2484, .hw_value = 14 },
  52 };
  53
  54 /* This table contains the hardware specific values for the modulation rates. */
  55 static const struct ieee80211_rate lbtf_rates[] = {
  56         { .bitrate = 10,
  57           .hw_value = 0, },
  58         { .bitrate = 20,
  59           .hw_value = 1,
  60           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  61         { .bitrate = 55,
  62           .hw_value = 2,
  63           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  64         { .bitrate = 110,
  65           .hw_value = 3,
  66           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  67         { .bitrate = 60,
  68           .hw_value = 5,
  69           .flags = 0 },
  70         { .bitrate = 90,
  71           .hw_value = 6,
  72           .flags = 0 },
  73         { .bitrate = 120,
  74           .hw_value = 7,
  75           .flags = 0 },
  76         { .bitrate = 180,
  77           .hw_value = 8,
  78           .flags = 0 },
  79         { .bitrate = 240,
  80           .hw_value = 9,
  81           .flags = 0 },
  82         { .bitrate = 360,
  83           .hw_value = 10,
  84           .flags = 0 },
  85         { .bitrate = 480,
  86           .hw_value = 11,
  87           .flags = 0 },
  88         { .bitrate = 540,
  89           .hw_value = 12,
  90           .flags = 0 },
  91 };
  92
  93 static void lbtf_cmd_work(struct work_struct *work)
  94 {
  95         struct lbtf_private *priv = container_of(work, struct lbtf_private,
  96                                          cmd_work);
  97
  98         lbtf_deb_enter(LBTF_DEB_CMD);
  99
 100         spin_lock_irq(&priv->driver_lock);
 101         /* command response? */
 102         if (priv->cmd_response_rxed) {
 103                 priv->cmd_response_rxed = 0;
 104                 spin_unlock_irq(&priv->driver_lock);
 105                 lbtf_process_rx_command(priv);
 106                 spin_lock_irq(&priv->driver_lock);
 107         }
 108
 109         if (priv->cmd_timed_out && priv->cur_cmd) {
 110                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 111
 112                 if (++priv->nr_retries > 10) {
 113                         lbtf_complete_command(priv, cmdnode,
 114                                               -ETIMEDOUT);
 115                         priv->nr_retries = 0;
 116                 } else {
 117                         priv->cur_cmd = NULL;
 118
 119                         /* Stick it back at the _top_ of the pending
 120                          * queue for immediate resubmission */
 121                         list_add(&cmdnode->list, &priv->cmdpendingq);
 122                 }
 123         }
 124         priv->cmd_timed_out = 0;
 125         spin_unlock_irq(&priv->driver_lock);
 126
 127         if (!priv->fw_ready) {
 128                 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
 129                 return;
 130         }
 131
 132         /* Execute the next command */
 133         if (!priv->cur_cmd)
 134                 lbtf_execute_next_command(priv);
 135
 136         lbtf_deb_leave(LBTF_DEB_CMD);
 137 }
 138
 139 /**
 140  *  lbtf_setup_firmware: initialize firmware.
 141  *
 142  *  @priv    A pointer to struct lbtf_private structure
 143  *
 144  *  Returns: 0 on success.
 145  */
 146 static int lbtf_setup_firmware(struct lbtf_private *priv)
 147 {
 148         int ret = -1;
 149
 150         lbtf_deb_enter(LBTF_DEB_FW);
 151         /*
 152          * Read priv address from HW
 153          */
 154         memset(priv->current_addr, 0xff, ETH_ALEN);
 155         ret = lbtf_update_hw_spec(priv);
 156         if (ret) {
 157                 ret = -1;
 158                 goto done;
 159         }
 160
 161         lbtf_set_mac_control(priv);
 162         lbtf_set_radio_control(priv);
 163
 164         ret = 0;
 165 done:
 166         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
 167         return ret;
 168 }
 169
 170 /**
 171  *  This function handles the timeout of command sending.
 172  *  It will re-send the same command again.
 173  */
 174 static void command_timer_fn(unsigned long data)
 175 {
 176         struct lbtf_private *priv = (struct lbtf_private *)data;
 177         unsigned long flags;
 178         lbtf_deb_enter(LBTF_DEB_CMD);
 179
 180         spin_lock_irqsave(&priv->driver_lock, flags);
 181
 182         if (!priv->cur_cmd) {
 183                 printk(KERN_DEBUG "libertastf: command timer expired; "
 184                                   "no pending command\n");
 185                 goto out;
 186         }
 187
 188         printk(KERN_DEBUG "libertas: command %x timed out\n",
 189                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 190
 191         priv->cmd_timed_out = 1;
 192         queue_work(lbtf_wq, &priv->cmd_work);
 193 out:
 194         spin_unlock_irqrestore(&priv->driver_lock, flags);
 195         lbtf_deb_leave(LBTF_DEB_CMD);
 196 }
 197
 198 static int lbtf_init_adapter(struct lbtf_private *priv)
 199 {
 200         lbtf_deb_enter(LBTF_DEB_MAIN);
 201         memset(priv->current_addr, 0xff, ETH_ALEN);
 202         mutex_init(&priv->lock);
 203
 204         priv->vif = NULL;
 205         setup_timer(&priv->command_timer, command_timer_fn,
 206                 (unsigned long)priv);
 207
 208         INIT_LIST_HEAD(&priv->cmdfreeq);
 209         INIT_LIST_HEAD(&priv->cmdpendingq);
 210
 211         spin_lock_init(&priv->driver_lock);
 212
 213         /* Allocate the command buffers */
 214         if (lbtf_allocate_cmd_buffer(priv))
 215                 return -1;
 216
 217         lbtf_deb_leave(LBTF_DEB_MAIN);
 218         return 0;
 219 }
 220
 221 static void lbtf_free_adapter(struct lbtf_private *priv)
 222 {
 223         lbtf_deb_enter(LBTF_DEB_MAIN);
 224         lbtf_free_cmd_buffer(priv);
 225         del_timer(&priv->command_timer);
 226         lbtf_deb_leave(LBTF_DEB_MAIN);
 227 }
 228
 229 static void lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 230 {
 231         struct lbtf_private *priv = hw->priv;
 232
 233         priv->skb_to_tx = skb;
 234         queue_work(lbtf_wq, &priv->tx_work);
 235         /*
 236          * queue will be restarted when we receive transmission feedback if
 237          * there are no buffered multicast frames to send
 238          */
 239         ieee80211_stop_queues(priv->hw);
 240 }
 241
 242 static void lbtf_tx_work(struct work_struct *work)
 243 {
 244         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 245                                          tx_work);
 246         unsigned int len;
 247         struct ieee80211_tx_info *info;
 248         struct txpd *txpd;
 249         struct sk_buff *skb = NULL;
 250         int err;
 251
 252         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 253
 254         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 255             (!skb_queue_empty(&priv->bc_ps_buf)))
 256                 skb = skb_dequeue(&priv->bc_ps_buf);
 257         else if (priv->skb_to_tx) {
 258                 skb = priv->skb_to_tx;
 259                 priv->skb_to_tx = NULL;
 260         } else {
 261                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 262                 return;
 263         }
 264
 265         len = skb->len;
 266         info  = IEEE80211_SKB_CB(skb);
 267         txpd = (struct txpd *)  skb_push(skb, sizeof(struct txpd));
 268
 269         if (priv->surpriseremoved) {
 270                 dev_kfree_skb_any(skb);
 271                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 272                 return;
 273         }
 274
 275         memset(txpd, 0, sizeof(struct txpd));
 276         /* Activate per-packet rate selection */
 277         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 278                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 279
 280         /* copy destination address from 802.11 header */
 281         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 282                 ETH_ALEN);
 283         txpd->tx_packet_length = cpu_to_le16(len);
 284         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 285         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 286         BUG_ON(priv->tx_skb);
 287         spin_lock_irq(&priv->driver_lock);
 288         priv->tx_skb = skb;
 289         err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 290         spin_unlock_irq(&priv->driver_lock);
 291         if (err) {
 292                 dev_kfree_skb_any(skb);
 293                 priv->tx_skb = NULL;
 294                 pr_err("TX error: %d", err);
 295         }
 296         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 297 }
 298
 299 static int lbtf_op_start(struct ieee80211_hw *hw)
 300 {
 301         struct lbtf_private *priv = hw->priv;
 302         void *card = priv->card;
 303         int ret = -1;
 304
 305         lbtf_deb_enter(LBTF_DEB_MACOPS);
 306
 307         if (!priv->fw_ready)
 308                 /* Upload firmware */
 309                 if (priv->hw_prog_firmware(card))
 310                         goto err_prog_firmware;
 311
 312         /* poke the firmware */
 313         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 314         priv->radioon = RADIO_ON;
 315         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 316         ret = lbtf_setup_firmware(priv);
 317         if (ret)
 318                 goto err_prog_firmware;
 319
 320         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
 321             (priv->fwrelease > LBTF_FW_VER_MAX)) {
 322                 ret = -1;
 323                 goto err_prog_firmware;
 324         }
 325
 326         printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 327         lbtf_deb_leave(LBTF_DEB_MACOPS);
 328         return 0;
 329
 330 err_prog_firmware:
 331         priv->hw_reset_device(card);
 332         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programing fw; ret=%d", ret);
 333         return ret;
 334 }
 335
 336 static void lbtf_op_stop(struct ieee80211_hw *hw)
 337 {
 338         struct lbtf_private *priv = hw->priv;
 339         unsigned long flags;
 340         struct sk_buff *skb;
 341
 342         struct cmd_ctrl_node *cmdnode;
 343
 344         lbtf_deb_enter(LBTF_DEB_MACOPS);
 345
 346         /* Flush pending command nodes */
 347         spin_lock_irqsave(&priv->driver_lock, flags);
 348         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 349                 cmdnode->result = -ENOENT;
 350                 cmdnode->cmdwaitqwoken = 1;
 351                 wake_up_interruptible(&cmdnode->cmdwait_q);
 352         }
 353
 354         spin_unlock_irqrestore(&priv->driver_lock, flags);
 355         cancel_work_sync(&priv->cmd_work);
 356         cancel_work_sync(&priv->tx_work);
 357         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 358                 dev_kfree_skb_any(skb);
 359         priv->radioon = RADIO_OFF;
 360         lbtf_set_radio_control(priv);
 361
 362         lbtf_deb_leave(LBTF_DEB_MACOPS);
 363 }
 364
 365 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 366                         struct ieee80211_vif *vif)
 367 {
 368         struct lbtf_private *priv = hw->priv;
 369         lbtf_deb_enter(LBTF_DEB_MACOPS);
 370         if (priv->vif != NULL)
 371                 return -EOPNOTSUPP;
 372
 373         priv->vif = vif;
 374         switch (vif->type) {
 375         case NL80211_IFTYPE_MESH_POINT:
 376         case NL80211_IFTYPE_AP:
 377                 lbtf_set_mode(priv, LBTF_AP_MODE);
 378                 break;
 379         case NL80211_IFTYPE_STATION:
 380                 lbtf_set_mode(priv, LBTF_STA_MODE);
 381                 break;
 382         default:
 383                 priv->vif = NULL;
 384                 return -EOPNOTSUPP;
 385         }
 386         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 387         lbtf_deb_leave(LBTF_DEB_MACOPS);
 388         return 0;
 389 }
 390
 391 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 392                         struct ieee80211_vif *vif)
 393 {
 394         struct lbtf_private *priv = hw->priv;
 395         lbtf_deb_enter(LBTF_DEB_MACOPS);
 396
 397         if (priv->vif->type == NL80211_IFTYPE_AP ||
 398             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 399                 lbtf_beacon_ctrl(priv, 0, 0);
 400         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 401         lbtf_set_bssid(priv, 0, NULL);
 402         priv->vif = NULL;
 403         lbtf_deb_leave(LBTF_DEB_MACOPS);
 404 }
 405
 406 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 407 {
 408         struct lbtf_private *priv = hw->priv;
 409         struct ieee80211_conf *conf = &hw->conf;
 410         lbtf_deb_enter(LBTF_DEB_MACOPS);
 411
 412         if (conf->channel->center_freq != priv->cur_freq) {
 413                 priv->cur_freq = conf->channel->center_freq;
 414                 lbtf_set_channel(priv, conf->channel->hw_value);
 415         }
 416         lbtf_deb_leave(LBTF_DEB_MACOPS);
 417         return 0;
 418 }
 419
 420 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 421                                      struct netdev_hw_addr_list *mc_list)
 422 {
 423         struct lbtf_private *priv = hw->priv;
 424         int i;
 425         struct netdev_hw_addr *ha;
 426         int mc_count = netdev_hw_addr_list_count(mc_list);
 427
 428         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 429                 return mc_count;
 430
 431         priv->nr_of_multicastmacaddr = mc_count;
 432         i = 0;
 433         netdev_hw_addr_list_for_each(ha, mc_list)
 434                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 435
 436         return mc_count;
 437 }
 438
 439 #define SUPPORTED_FIF_FLAGS  (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
 440 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 441                         unsigned int changed_flags,
 442                         unsigned int *new_flags,
 443                         u64 multicast)
 444 {
 445         struct lbtf_private *priv = hw->priv;
 446         int old_mac_control = priv->mac_control;
 447
 448         lbtf_deb_enter(LBTF_DEB_MACOPS);
 449
 450         changed_flags &= SUPPORTED_FIF_FLAGS;
 451         *new_flags &= SUPPORTED_FIF_FLAGS;
 452
 453         if (!changed_flags) {
 454                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 455                 return;
 456         }
 457
 458         if (*new_flags & (FIF_PROMISC_IN_BSS))
 459                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 460         else
 461                 priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 462         if (*new_flags & (FIF_ALLMULTI) ||
 463             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 464                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 465                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 466         } else if (multicast) {
 467                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 468                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 469                 lbtf_cmd_set_mac_multicast_addr(priv);
 470         } else {
 471                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 472                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 473                 if (priv->nr_of_multicastmacaddr) {
 474                         priv->nr_of_multicastmacaddr = 0;
 475                         lbtf_cmd_set_mac_multicast_addr(priv);
 476                 }
 477         }
 478
 479
 480         if (priv->mac_control != old_mac_control)
 481                 lbtf_set_mac_control(priv);
 482
 483         lbtf_deb_leave(LBTF_DEB_MACOPS);
 484 }
 485
 486 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 487                         struct ieee80211_vif *vif,
 488                         struct ieee80211_bss_conf *bss_conf,
 489                         u32 changes)
 490 {
 491         struct lbtf_private *priv = hw->priv;
 492         struct sk_buff *beacon;
 493         lbtf_deb_enter(LBTF_DEB_MACOPS);
 494
 495         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 496                 switch (priv->vif->type) {
 497                 case NL80211_IFTYPE_AP:
 498                 case NL80211_IFTYPE_MESH_POINT:
 499                         beacon = ieee80211_beacon_get(hw, vif);
 500                         if (beacon) {
 501                                 lbtf_beacon_set(priv, beacon);
 502                                 kfree_skb(beacon);
 503                                 lbtf_beacon_ctrl(priv, 1,
 504                                                  bss_conf->beacon_int);
 505                         }
 506                         break;
 507                 default:
 508                         break;
 509                 }
 510         }
 511
 512         if (changes & BSS_CHANGED_BSSID) {
 513                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 514                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 515         }
 516
 517         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 518                 if (bss_conf->use_short_preamble)
 519                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 520                 else
 521                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 522                 lbtf_set_radio_control(priv);
 523         }
 524
 525         lbtf_deb_leave(LBTF_DEB_MACOPS);
 526 }
 527
 528 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 529                                 struct survey_info *survey)
 530 {
 531         struct lbtf_private *priv = hw->priv;
 532         struct ieee80211_conf *conf = &hw->conf;
 533
 534         if (idx != 0)
 535                 return -ENOENT;
 536
 537         survey->channel = conf->channel;
 538         survey->filled = SURVEY_INFO_NOISE_DBM;
 539         survey->noise = priv->noise;
 540
 541         return 0;
 542 }
 543
 544 static const struct ieee80211_ops lbtf_ops = {
 545         .tx                     = lbtf_op_tx,
 546         .start                  = lbtf_op_start,
 547         .stop                   = lbtf_op_stop,
 548         .add_interface          = lbtf_op_add_interface,
 549         .remove_interface       = lbtf_op_remove_interface,
 550         .config                 = lbtf_op_config,
 551         .prepare_multicast      = lbtf_op_prepare_multicast,
 552         .configure_filter       = lbtf_op_configure_filter,
 553         .bss_info_changed       = lbtf_op_bss_info_changed,
 554         .get_survey             = lbtf_op_get_survey,
 555 };
 556
 557 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 558 {
 559         struct ieee80211_rx_status stats;
 560         struct rxpd *prxpd;
 561         int need_padding;
 562         unsigned int flags;
 563         struct ieee80211_hdr *hdr;
 564
 565         lbtf_deb_enter(LBTF_DEB_RX);
 566
 567         prxpd = (struct rxpd *) skb->data;
 568
 569         memset(&stats, 0, sizeof(stats));
 570         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 571                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 572         stats.freq = priv->cur_freq;
 573         stats.band = IEEE80211_BAND_2GHZ;
 574         stats.signal = prxpd->snr;
 575         priv->noise = prxpd->nf;
 576         /* Marvell rate index has a hole at value 4 */
 577         if (prxpd->rx_rate > 4)
 578                 --prxpd->rx_rate;
 579         stats.rate_idx = prxpd->rx_rate;
 580         skb_pull(skb, sizeof(struct rxpd));
 581
 582         hdr = (struct ieee80211_hdr *)skb->data;
 583         flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
 584
 585         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 586         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 587         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 588                         (*ieee80211_get_qos_ctl(hdr) &
 589                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 590
 591         if (need_padding) {
 592                 memmove(skb->data + 2, skb->data, skb->len);
 593                 skb_reserve(skb, 2);
 594         }
 595
 596         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 597
 598         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 599                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 600         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 601                      min_t(unsigned int, skb->len, 100));
 602
 603         ieee80211_rx_irqsafe(priv->hw, skb);
 604
 605         lbtf_deb_leave(LBTF_DEB_RX);
 606         return 0;
 607 }
 608 EXPORT_SYMBOL_GPL(lbtf_rx);
 609
 610 /**
 611  * lbtf_add_card: Add and initialize the card, no fw upload yet.
 612  *
 613  *  @card    A pointer to card
 614  *
 615  *  Returns: pointer to struct lbtf_priv.
 616  */
 617 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
 618 {
 619         struct ieee80211_hw *hw;
 620         struct lbtf_private *priv = NULL;
 621
 622         lbtf_deb_enter(LBTF_DEB_MAIN);
 623
 624         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 625         if (!hw)
 626                 goto done;
 627
 628         priv = hw->priv;
 629         if (lbtf_init_adapter(priv))
 630                 goto err_init_adapter;
 631
 632         priv->hw = hw;
 633         priv->card = card;
 634         priv->tx_skb = NULL;
 635
 636         hw->queues = 1;
 637         hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
 638         hw->extra_tx_headroom = sizeof(struct txpd);
 639         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 640         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 641         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 642         priv->band.bitrates = priv->rates;
 643         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 644         priv->band.channels = priv->channels;
 645         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
 646         hw->wiphy->interface_modes =
 647                 BIT(NL80211_IFTYPE_STATION) |
 648                 BIT(NL80211_IFTYPE_ADHOC);
 649         skb_queue_head_init(&priv->bc_ps_buf);
 650
 651         SET_IEEE80211_DEV(hw, dmdev);
 652
 653         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 654         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 655         if (ieee80211_register_hw(hw))
 656                 goto err_init_adapter;
 657
 658         goto done;
 659
 660 err_init_adapter:
 661         lbtf_free_adapter(priv);
 662         ieee80211_free_hw(hw);
 663         priv = NULL;
 664
 665 done:
 666         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 667         return priv;
 668 }
 669 EXPORT_SYMBOL_GPL(lbtf_add_card);
 670
 671
 672 int lbtf_remove_card(struct lbtf_private *priv)
 673 {
 674         struct ieee80211_hw *hw = priv->hw;
 675
 676         lbtf_deb_enter(LBTF_DEB_MAIN);
 677
 678         priv->surpriseremoved = 1;
 679         del_timer(&priv->command_timer);
 680         lbtf_free_adapter(priv);
 681         priv->hw = NULL;
 682         ieee80211_unregister_hw(hw);
 683         ieee80211_free_hw(hw);
 684
 685     lbtf_deb_leave(LBTF_DEB_MAIN);
 686         return 0;
 687 }
 688 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 689
 690 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 691 {
 692         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 693
 694         ieee80211_tx_info_clear_status(info);
 695         /*
 696          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 697          * default pid rc algorithm.
 698          *
 699          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 700          */
 701         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 702                 info->flags |= IEEE80211_TX_STAT_ACK;
 703         skb_pull(priv->tx_skb, sizeof(struct txpd));
 704         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 705         priv->tx_skb = NULL;
 706         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 707                 ieee80211_wake_queues(priv->hw);
 708         else
 709                 queue_work(lbtf_wq, &priv->tx_work);
 710 }
 711 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 712
 713 void lbtf_bcn_sent(struct lbtf_private *priv)
 714 {
 715         struct sk_buff *skb = NULL;
 716
 717         if (priv->vif->type != NL80211_IFTYPE_AP)
 718                 return;
 719
 720         if (skb_queue_empty(&priv->bc_ps_buf)) {
 721                 bool tx_buff_bc = 0;
 722
 723                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 724                         skb_queue_tail(&priv->bc_ps_buf, skb);
 725                         tx_buff_bc = 1;
 726                 }
 727                 if (tx_buff_bc) {
 728                         ieee80211_stop_queues(priv->hw);
 729                         queue_work(lbtf_wq, &priv->tx_work);
 730                 }
 731         }
 732
 733         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 734
 735         if (skb) {
 736                 lbtf_beacon_set(priv, skb);
 737                 kfree_skb(skb);
 738         }
 739 }
 740 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 741
 742 static int __init lbtf_init_module(void)
 743 {
 744         lbtf_deb_enter(LBTF_DEB_MAIN);
 745         lbtf_wq = create_workqueue("libertastf");
 746         if (lbtf_wq == NULL) {
 747                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 748                 return -ENOMEM;
 749         }
 750         lbtf_deb_leave(LBTF_DEB_MAIN);
 751         return 0;
 752 }
 753
 754 static void __exit lbtf_exit_module(void)
 755 {
 756         lbtf_deb_enter(LBTF_DEB_MAIN);
 757         destroy_workqueue(lbtf_wq);
 758         lbtf_deb_leave(LBTF_DEB_MAIN);
 759 }
 760
 761 module_init(lbtf_init_module);
 762 module_exit(lbtf_exit_module);
 763
 764 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 765 MODULE_AUTHOR("Cozybit Inc.");
 766 MODULE_LICENSE("GPL");