drivers/net/wireless/marvell/libertas_tf/main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (C) 2008, cozybit Inc.
   4  *  Copyright (C) 2003-2006, Marvell International Ltd.
   5  */
   6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   7
   8 #include <linux/hardirq.h>
   9 #include <linux/slab.h>
  10
  11 #include <linux/etherdevice.h>
  12 #include <linux/module.h>
  13 #include "libertas_tf.h"
  14
  15 /* thinfirm version: 5.132.X.pX */
  16 #define LBTF_FW_VER_MIN         0x05840300
  17 #define LBTF_FW_VER_MAX         0x0584ffff
  18
  19 /* Module parameters */
  20 unsigned int lbtf_debug;
  21 EXPORT_SYMBOL_GPL(lbtf_debug);
  22 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
  23
  24 struct workqueue_struct *lbtf_wq;
  25
  26 static const struct ieee80211_channel lbtf_channels[] = {
  27         { .center_freq = 2412, .hw_value = 1 },
  28         { .center_freq = 2417, .hw_value = 2 },
  29         { .center_freq = 2422, .hw_value = 3 },
  30         { .center_freq = 2427, .hw_value = 4 },
  31         { .center_freq = 2432, .hw_value = 5 },
  32         { .center_freq = 2437, .hw_value = 6 },
  33         { .center_freq = 2442, .hw_value = 7 },
  34         { .center_freq = 2447, .hw_value = 8 },
  35         { .center_freq = 2452, .hw_value = 9 },
  36         { .center_freq = 2457, .hw_value = 10 },
  37         { .center_freq = 2462, .hw_value = 11 },
  38         { .center_freq = 2467, .hw_value = 12 },
  39         { .center_freq = 2472, .hw_value = 13 },
  40         { .center_freq = 2484, .hw_value = 14 },
  41 };
  42
  43 /* This table contains the hardware specific values for the modulation rates. */
  44 static const struct ieee80211_rate lbtf_rates[] = {
  45         { .bitrate = 10,
  46           .hw_value = 0, },
  47         { .bitrate = 20,
  48           .hw_value = 1,
  49           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  50         { .bitrate = 55,
  51           .hw_value = 2,
  52           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  53         { .bitrate = 110,
  54           .hw_value = 3,
  55           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  56         { .bitrate = 60,
  57           .hw_value = 5,
  58           .flags = 0 },
  59         { .bitrate = 90,
  60           .hw_value = 6,
  61           .flags = 0 },
  62         { .bitrate = 120,
  63           .hw_value = 7,
  64           .flags = 0 },
  65         { .bitrate = 180,
  66           .hw_value = 8,
  67           .flags = 0 },
  68         { .bitrate = 240,
  69           .hw_value = 9,
  70           .flags = 0 },
  71         { .bitrate = 360,
  72           .hw_value = 10,
  73           .flags = 0 },
  74         { .bitrate = 480,
  75           .hw_value = 11,
  76           .flags = 0 },
  77         { .bitrate = 540,
  78           .hw_value = 12,
  79           .flags = 0 },
  80 };
  81
  82 static void lbtf_cmd_work(struct work_struct *work)
  83 {
  84         struct lbtf_private *priv = container_of(work, struct lbtf_private,
  85                                          cmd_work);
  86
  87         lbtf_deb_enter(LBTF_DEB_CMD);
  88
  89         spin_lock_irq(&priv->driver_lock);
  90         /* command response? */
  91         if (priv->cmd_response_rxed) {
  92                 priv->cmd_response_rxed = 0;
  93                 spin_unlock_irq(&priv->driver_lock);
  94                 lbtf_process_rx_command(priv);
  95                 spin_lock_irq(&priv->driver_lock);
  96         }
  97
  98         if (priv->cmd_timed_out && priv->cur_cmd) {
  99                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 100
 101                 if (++priv->nr_retries > 10) {
 102                         lbtf_complete_command(priv, cmdnode,
 103                                               -ETIMEDOUT);
 104                         priv->nr_retries = 0;
 105                 } else {
 106                         priv->cur_cmd = NULL;
 107
 108                         /* Stick it back at the _top_ of the pending
 109                          * queue for immediate resubmission */
 110                         list_add(&cmdnode->list, &priv->cmdpendingq);
 111                 }
 112         }
 113         priv->cmd_timed_out = 0;
 114         spin_unlock_irq(&priv->driver_lock);
 115
 116         /* Execute the next command */
 117         if (!priv->cur_cmd)
 118                 lbtf_execute_next_command(priv);
 119
 120         lbtf_deb_leave(LBTF_DEB_CMD);
 121 }
 122
 123 /*
 124  *  This function handles the timeout of command sending.
 125  *  It will re-send the same command again.
 126  */
 127 static void command_timer_fn(struct timer_list *t)
 128 {
 129         struct lbtf_private *priv = from_timer(priv, t, command_timer);
 130         unsigned long flags;
 131         lbtf_deb_enter(LBTF_DEB_CMD);
 132
 133         spin_lock_irqsave(&priv->driver_lock, flags);
 134
 135         if (!priv->cur_cmd) {
 136                 printk(KERN_DEBUG "libertastf: command timer expired; "
 137                                   "no pending command\n");
 138                 goto out;
 139         }
 140
 141         printk(KERN_DEBUG "libertas: command %x timed out\n",
 142                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 143
 144         priv->cmd_timed_out = 1;
 145         queue_work(lbtf_wq, &priv->cmd_work);
 146 out:
 147         spin_unlock_irqrestore(&priv->driver_lock, flags);
 148         lbtf_deb_leave(LBTF_DEB_CMD);
 149 }
 150
 151 static int lbtf_init_adapter(struct lbtf_private *priv)
 152 {
 153         lbtf_deb_enter(LBTF_DEB_MAIN);
 154         eth_broadcast_addr(priv->current_addr);
 155         mutex_init(&priv->lock);
 156
 157         priv->vif = NULL;
 158         timer_setup(&priv->command_timer, command_timer_fn, 0);
 159
 160         INIT_LIST_HEAD(&priv->cmdfreeq);
 161         INIT_LIST_HEAD(&priv->cmdpendingq);
 162
 163         spin_lock_init(&priv->driver_lock);
 164
 165         /* Allocate the command buffers */
 166         if (lbtf_allocate_cmd_buffer(priv))
 167                 return -1;
 168
 169         lbtf_deb_leave(LBTF_DEB_MAIN);
 170         return 0;
 171 }
 172
 173 static void lbtf_free_adapter(struct lbtf_private *priv)
 174 {
 175         lbtf_deb_enter(LBTF_DEB_MAIN);
 176         lbtf_free_cmd_buffer(priv);
 177         del_timer(&priv->command_timer);
 178         lbtf_deb_leave(LBTF_DEB_MAIN);
 179 }
 180
 181 static void lbtf_op_tx(struct ieee80211_hw *hw,
 182                        struct ieee80211_tx_control *control,
 183                        struct sk_buff *skb)
 184 {
 185         struct lbtf_private *priv = hw->priv;
 186
 187         priv->skb_to_tx = skb;
 188         queue_work(lbtf_wq, &priv->tx_work);
 189         /*
 190          * queue will be restarted when we receive transmission feedback if
 191          * there are no buffered multicast frames to send
 192          */
 193         ieee80211_stop_queues(priv->hw);
 194 }
 195
 196 static void lbtf_tx_work(struct work_struct *work)
 197 {
 198         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 199                                          tx_work);
 200         unsigned int len;
 201         struct ieee80211_tx_info *info;
 202         struct txpd *txpd;
 203         struct sk_buff *skb = NULL;
 204         int err;
 205
 206         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 207
 208         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 209             (!skb_queue_empty(&priv->bc_ps_buf)))
 210                 skb = skb_dequeue(&priv->bc_ps_buf);
 211         else if (priv->skb_to_tx) {
 212                 skb = priv->skb_to_tx;
 213                 priv->skb_to_tx = NULL;
 214         } else {
 215                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 216                 return;
 217         }
 218
 219         len = skb->len;
 220         info  = IEEE80211_SKB_CB(skb);
 221         txpd = skb_push(skb, sizeof(struct txpd));
 222
 223         if (priv->surpriseremoved) {
 224                 dev_kfree_skb_any(skb);
 225                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 226                 return;
 227         }
 228
 229         memset(txpd, 0, sizeof(struct txpd));
 230         /* Activate per-packet rate selection */
 231         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 232                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 233
 234         /* copy destination address from 802.11 header */
 235         BUILD_BUG_ON(sizeof(txpd->tx_dest_addr) != ETH_ALEN);
 236         memcpy(&txpd->tx_dest_addr, skb->data + sizeof(struct txpd) + 4,
 237                 ETH_ALEN);
 238         txpd->tx_packet_length = cpu_to_le16(len);
 239         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 240         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 241         BUG_ON(priv->tx_skb);
 242         spin_lock_irq(&priv->driver_lock);
 243         priv->tx_skb = skb;
 244         err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 245         spin_unlock_irq(&priv->driver_lock);
 246         if (err) {
 247                 dev_kfree_skb_any(skb);
 248                 priv->tx_skb = NULL;
 249                 pr_err("TX error: %d", err);
 250         }
 251         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 252 }
 253
 254 static int lbtf_op_start(struct ieee80211_hw *hw)
 255 {
 256         struct lbtf_private *priv = hw->priv;
 257
 258         lbtf_deb_enter(LBTF_DEB_MACOPS);
 259
 260         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 261         priv->radioon = RADIO_ON;
 262         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 263         lbtf_set_mac_control(priv);
 264         lbtf_set_radio_control(priv);
 265
 266         lbtf_deb_leave(LBTF_DEB_MACOPS);
 267         return 0;
 268 }
 269
 270 static void lbtf_op_stop(struct ieee80211_hw *hw)
 271 {
 272         struct lbtf_private *priv = hw->priv;
 273         unsigned long flags;
 274         struct sk_buff *skb;
 275
 276         struct cmd_ctrl_node *cmdnode;
 277
 278         lbtf_deb_enter(LBTF_DEB_MACOPS);
 279
 280         /* Flush pending command nodes */
 281         spin_lock_irqsave(&priv->driver_lock, flags);
 282         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 283                 cmdnode->result = -ENOENT;
 284                 cmdnode->cmdwaitqwoken = 1;
 285                 wake_up_interruptible(&cmdnode->cmdwait_q);
 286         }
 287
 288         spin_unlock_irqrestore(&priv->driver_lock, flags);
 289         cancel_work_sync(&priv->cmd_work);
 290         cancel_work_sync(&priv->tx_work);
 291         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 292                 dev_kfree_skb_any(skb);
 293         priv->radioon = RADIO_OFF;
 294         lbtf_set_radio_control(priv);
 295
 296         lbtf_deb_leave(LBTF_DEB_MACOPS);
 297 }
 298
 299 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 300                         struct ieee80211_vif *vif)
 301 {
 302         struct lbtf_private *priv = hw->priv;
 303         lbtf_deb_enter(LBTF_DEB_MACOPS);
 304         if (priv->vif != NULL)
 305                 return -EOPNOTSUPP;
 306
 307         priv->vif = vif;
 308         switch (vif->type) {
 309         case NL80211_IFTYPE_MESH_POINT:
 310         case NL80211_IFTYPE_AP:
 311                 lbtf_set_mode(priv, LBTF_AP_MODE);
 312                 break;
 313         case NL80211_IFTYPE_STATION:
 314                 lbtf_set_mode(priv, LBTF_STA_MODE);
 315                 break;
 316         default:
 317                 priv->vif = NULL;
 318                 return -EOPNOTSUPP;
 319         }
 320         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 321         lbtf_deb_leave(LBTF_DEB_MACOPS);
 322         return 0;
 323 }
 324
 325 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 326                         struct ieee80211_vif *vif)
 327 {
 328         struct lbtf_private *priv = hw->priv;
 329         lbtf_deb_enter(LBTF_DEB_MACOPS);
 330
 331         if (priv->vif->type == NL80211_IFTYPE_AP ||
 332             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 333                 lbtf_beacon_ctrl(priv, 0, 0);
 334         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 335         lbtf_set_bssid(priv, 0, NULL);
 336         priv->vif = NULL;
 337         lbtf_deb_leave(LBTF_DEB_MACOPS);
 338 }
 339
 340 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 341 {
 342         struct lbtf_private *priv = hw->priv;
 343         struct ieee80211_conf *conf = &hw->conf;
 344         lbtf_deb_enter(LBTF_DEB_MACOPS);
 345
 346         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 347                 priv->cur_freq = conf->chandef.chan->center_freq;
 348                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 349         }
 350         lbtf_deb_leave(LBTF_DEB_MACOPS);
 351         return 0;
 352 }
 353
 354 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 355                                      struct netdev_hw_addr_list *mc_list)
 356 {
 357         struct lbtf_private *priv = hw->priv;
 358         int i;
 359         struct netdev_hw_addr *ha;
 360         int mc_count = netdev_hw_addr_list_count(mc_list);
 361
 362         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 363                 return mc_count;
 364
 365         priv->nr_of_multicastmacaddr = mc_count;
 366         i = 0;
 367         netdev_hw_addr_list_for_each(ha, mc_list)
 368                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 369
 370         return mc_count;
 371 }
 372
 373 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 374 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 375                         unsigned int changed_flags,
 376                         unsigned int *new_flags,
 377                         u64 multicast)
 378 {
 379         struct lbtf_private *priv = hw->priv;
 380         int old_mac_control = priv->mac_control;
 381
 382         lbtf_deb_enter(LBTF_DEB_MACOPS);
 383
 384         changed_flags &= SUPPORTED_FIF_FLAGS;
 385         *new_flags &= SUPPORTED_FIF_FLAGS;
 386
 387         if (!changed_flags) {
 388                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 389                 return;
 390         }
 391
 392         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 393         if (*new_flags & (FIF_ALLMULTI) ||
 394             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 395                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 396                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 397         } else if (multicast) {
 398                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 399                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 400                 lbtf_cmd_set_mac_multicast_addr(priv);
 401         } else {
 402                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 403                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 404                 if (priv->nr_of_multicastmacaddr) {
 405                         priv->nr_of_multicastmacaddr = 0;
 406                         lbtf_cmd_set_mac_multicast_addr(priv);
 407                 }
 408         }
 409
 410
 411         if (priv->mac_control != old_mac_control)
 412                 lbtf_set_mac_control(priv);
 413
 414         lbtf_deb_leave(LBTF_DEB_MACOPS);
 415 }
 416
 417 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 418                         struct ieee80211_vif *vif,
 419                         struct ieee80211_bss_conf *bss_conf,
 420                         u32 changes)
 421 {
 422         struct lbtf_private *priv = hw->priv;
 423         struct sk_buff *beacon;
 424         lbtf_deb_enter(LBTF_DEB_MACOPS);
 425
 426         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 427                 switch (priv->vif->type) {
 428                 case NL80211_IFTYPE_AP:
 429                 case NL80211_IFTYPE_MESH_POINT:
 430                         beacon = ieee80211_beacon_get(hw, vif);
 431                         if (beacon) {
 432                                 lbtf_beacon_set(priv, beacon);
 433                                 kfree_skb(beacon);
 434                                 lbtf_beacon_ctrl(priv, 1,
 435                                                  bss_conf->beacon_int);
 436                         }
 437                         break;
 438                 default:
 439                         break;
 440                 }
 441         }
 442
 443         if (changes & BSS_CHANGED_BSSID) {
 444                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 445                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 446         }
 447
 448         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 449                 if (bss_conf->use_short_preamble)
 450                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 451                 else
 452                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 453                 lbtf_set_radio_control(priv);
 454         }
 455
 456         lbtf_deb_leave(LBTF_DEB_MACOPS);
 457 }
 458
 459 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 460                                 struct survey_info *survey)
 461 {
 462         struct lbtf_private *priv = hw->priv;
 463         struct ieee80211_conf *conf = &hw->conf;
 464
 465         if (idx != 0)
 466                 return -ENOENT;
 467
 468         survey->channel = conf->chandef.chan;
 469         survey->filled = SURVEY_INFO_NOISE_DBM;
 470         survey->noise = priv->noise;
 471
 472         return 0;
 473 }
 474
 475 static const struct ieee80211_ops lbtf_ops = {
 476         .tx                     = lbtf_op_tx,
 477         .start                  = lbtf_op_start,
 478         .stop                   = lbtf_op_stop,
 479         .add_interface          = lbtf_op_add_interface,
 480         .remove_interface       = lbtf_op_remove_interface,
 481         .config                 = lbtf_op_config,
 482         .prepare_multicast      = lbtf_op_prepare_multicast,
 483         .configure_filter       = lbtf_op_configure_filter,
 484         .bss_info_changed       = lbtf_op_bss_info_changed,
 485         .get_survey             = lbtf_op_get_survey,
 486 };
 487
 488 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 489 {
 490         struct ieee80211_rx_status stats;
 491         struct rxpd *prxpd;
 492         int need_padding;
 493         struct ieee80211_hdr *hdr;
 494
 495         lbtf_deb_enter(LBTF_DEB_RX);
 496
 497         if (priv->radioon != RADIO_ON) {
 498                 lbtf_deb_rx("rx before we turned on the radio");
 499                 goto done;
 500         }
 501
 502         prxpd = (struct rxpd *) skb->data;
 503
 504         memset(&stats, 0, sizeof(stats));
 505         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 506                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 507         stats.freq = priv->cur_freq;
 508         stats.band = NL80211_BAND_2GHZ;
 509         stats.signal = prxpd->snr - prxpd->nf;
 510         priv->noise = prxpd->nf;
 511         /* Marvell rate index has a hole at value 4 */
 512         if (prxpd->rx_rate > 4)
 513                 --prxpd->rx_rate;
 514         stats.rate_idx = prxpd->rx_rate;
 515         skb_pull(skb, sizeof(struct rxpd));
 516
 517         hdr = (struct ieee80211_hdr *)skb->data;
 518
 519         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 520         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 521         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 522                         (*ieee80211_get_qos_ctl(hdr) &
 523                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 524
 525         if (need_padding) {
 526                 memmove(skb->data + 2, skb->data, skb->len);
 527                 skb_reserve(skb, 2);
 528         }
 529
 530         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 531
 532         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 533                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 534         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 535                      min_t(unsigned int, skb->len, 100));
 536
 537         ieee80211_rx_irqsafe(priv->hw, skb);
 538
 539 done:
 540         lbtf_deb_leave(LBTF_DEB_RX);
 541         return 0;
 542 }
 543 EXPORT_SYMBOL_GPL(lbtf_rx);
 544
 545 /*
 546  * lbtf_add_card: Add and initialize the card.
 547  *
 548  *  Returns: pointer to struct lbtf_priv.
 549  */
 550 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
 551                                    const struct lbtf_ops *ops)
 552 {
 553         struct ieee80211_hw *hw;
 554         struct lbtf_private *priv = NULL;
 555
 556         lbtf_deb_enter(LBTF_DEB_MAIN);
 557
 558         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 559         if (!hw)
 560                 goto done;
 561
 562         priv = hw->priv;
 563         if (lbtf_init_adapter(priv))
 564                 goto err_init_adapter;
 565
 566         priv->hw = hw;
 567         priv->card = card;
 568         priv->ops = ops;
 569         priv->tx_skb = NULL;
 570         priv->radioon = RADIO_OFF;
 571
 572         hw->queues = 1;
 573         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 574         ieee80211_hw_set(hw, SIGNAL_DBM);
 575         hw->extra_tx_headroom = sizeof(struct txpd);
 576         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 577         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 578         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 579         priv->band.bitrates = priv->rates;
 580         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 581         priv->band.channels = priv->channels;
 582         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 583         hw->wiphy->interface_modes =
 584                 BIT(NL80211_IFTYPE_STATION) |
 585                 BIT(NL80211_IFTYPE_ADHOC);
 586         skb_queue_head_init(&priv->bc_ps_buf);
 587
 588         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 589
 590         SET_IEEE80211_DEV(hw, dmdev);
 591
 592         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 593         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 594
 595         if (priv->ops->hw_prog_firmware(priv)) {
 596                 lbtf_deb_usbd(dmdev, "Error programming the firmware\n");
 597                 priv->ops->hw_reset_device(priv);
 598                 goto err_init_adapter;
 599         }
 600
 601         eth_broadcast_addr(priv->current_addr);
 602         if (lbtf_update_hw_spec(priv))
 603                 goto err_init_adapter;
 604
 605         if (priv->fwrelease < LBTF_FW_VER_MIN ||
 606             priv->fwrelease > LBTF_FW_VER_MAX) {
 607                 goto err_init_adapter;
 608         }
 609
 610         /* The firmware seems to start with the radio enabled. Turn it
 611          * off before an actual mac80211 start callback is invoked.
 612          */
 613         lbtf_set_radio_control(priv);
 614
 615         if (ieee80211_register_hw(hw))
 616                 goto err_init_adapter;
 617
 618         dev_info(dmdev, "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 619         goto done;
 620
 621 err_init_adapter:
 622         lbtf_free_adapter(priv);
 623         ieee80211_free_hw(hw);
 624         priv = NULL;
 625
 626 done:
 627         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 628         return priv;
 629 }
 630 EXPORT_SYMBOL_GPL(lbtf_add_card);
 631
 632
 633 int lbtf_remove_card(struct lbtf_private *priv)
 634 {
 635         struct ieee80211_hw *hw = priv->hw;
 636
 637         lbtf_deb_enter(LBTF_DEB_MAIN);
 638
 639         priv->surpriseremoved = 1;
 640         del_timer(&priv->command_timer);
 641         lbtf_free_adapter(priv);
 642         priv->hw = NULL;
 643         ieee80211_unregister_hw(hw);
 644         ieee80211_free_hw(hw);
 645
 646         lbtf_deb_leave(LBTF_DEB_MAIN);
 647         return 0;
 648 }
 649 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 650
 651 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 652 {
 653         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 654
 655         ieee80211_tx_info_clear_status(info);
 656         /*
 657          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 658          * default pid rc algorithm.
 659          *
 660          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 661          */
 662         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 663                 info->flags |= IEEE80211_TX_STAT_ACK;
 664         skb_pull(priv->tx_skb, sizeof(struct txpd));
 665         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 666         priv->tx_skb = NULL;
 667         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 668                 ieee80211_wake_queues(priv->hw);
 669         else
 670                 queue_work(lbtf_wq, &priv->tx_work);
 671 }
 672 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 673
 674 void lbtf_bcn_sent(struct lbtf_private *priv)
 675 {
 676         struct sk_buff *skb = NULL;
 677
 678         if (priv->vif->type != NL80211_IFTYPE_AP)
 679                 return;
 680
 681         if (skb_queue_empty(&priv->bc_ps_buf)) {
 682                 bool tx_buff_bc = false;
 683
 684                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 685                         skb_queue_tail(&priv->bc_ps_buf, skb);
 686                         tx_buff_bc = true;
 687                 }
 688                 if (tx_buff_bc) {
 689                         ieee80211_stop_queues(priv->hw);
 690                         queue_work(lbtf_wq, &priv->tx_work);
 691                 }
 692         }
 693
 694         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 695
 696         if (skb) {
 697                 lbtf_beacon_set(priv, skb);
 698                 kfree_skb(skb);
 699         }
 700 }
 701 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 702
 703 static int __init lbtf_init_module(void)
 704 {
 705         lbtf_deb_enter(LBTF_DEB_MAIN);
 706         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 707         if (lbtf_wq == NULL) {
 708                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 709                 return -ENOMEM;
 710         }
 711         lbtf_deb_leave(LBTF_DEB_MAIN);
 712         return 0;
 713 }
 714
 715 static void __exit lbtf_exit_module(void)
 716 {
 717         lbtf_deb_enter(LBTF_DEB_MAIN);
 718         destroy_workqueue(lbtf_wq);
 719         lbtf_deb_leave(LBTF_DEB_MAIN);
 720 }
 721
 722 module_init(lbtf_init_module);
 723 module_exit(lbtf_exit_module);
 724
 725 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 726 MODULE_AUTHOR("Cozybit Inc.");
 727 MODULE_LICENSE("GPL");