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         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 236                 ETH_ALEN);
 237         txpd->tx_packet_length = cpu_to_le16(len);
 238         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 239         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 240         BUG_ON(priv->tx_skb);
 241         spin_lock_irq(&priv->driver_lock);
 242         priv->tx_skb = skb;
 243         err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 244         spin_unlock_irq(&priv->driver_lock);
 245         if (err) {
 246                 dev_kfree_skb_any(skb);
 247                 priv->tx_skb = NULL;
 248                 pr_err("TX error: %d", err);
 249         }
 250         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 251 }
 252
 253 static int lbtf_op_start(struct ieee80211_hw *hw)
 254 {
 255         struct lbtf_private *priv = hw->priv;
 256
 257         lbtf_deb_enter(LBTF_DEB_MACOPS);
 258
 259         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 260         priv->radioon = RADIO_ON;
 261         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 262         lbtf_set_mac_control(priv);
 263         lbtf_set_radio_control(priv);
 264
 265         lbtf_deb_leave(LBTF_DEB_MACOPS);
 266         return 0;
 267 }
 268
 269 static void lbtf_op_stop(struct ieee80211_hw *hw)
 270 {
 271         struct lbtf_private *priv = hw->priv;
 272         unsigned long flags;
 273         struct sk_buff *skb;
 274
 275         struct cmd_ctrl_node *cmdnode;
 276
 277         lbtf_deb_enter(LBTF_DEB_MACOPS);
 278
 279         /* Flush pending command nodes */
 280         spin_lock_irqsave(&priv->driver_lock, flags);
 281         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 282                 cmdnode->result = -ENOENT;
 283                 cmdnode->cmdwaitqwoken = 1;
 284                 wake_up_interruptible(&cmdnode->cmdwait_q);
 285         }
 286
 287         spin_unlock_irqrestore(&priv->driver_lock, flags);
 288         cancel_work_sync(&priv->cmd_work);
 289         cancel_work_sync(&priv->tx_work);
 290         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 291                 dev_kfree_skb_any(skb);
 292         priv->radioon = RADIO_OFF;
 293         lbtf_set_radio_control(priv);
 294
 295         lbtf_deb_leave(LBTF_DEB_MACOPS);
 296 }
 297
 298 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 299                         struct ieee80211_vif *vif)
 300 {
 301         struct lbtf_private *priv = hw->priv;
 302         lbtf_deb_enter(LBTF_DEB_MACOPS);
 303         if (priv->vif != NULL)
 304                 return -EOPNOTSUPP;
 305
 306         priv->vif = vif;
 307         switch (vif->type) {
 308         case NL80211_IFTYPE_MESH_POINT:
 309         case NL80211_IFTYPE_AP:
 310                 lbtf_set_mode(priv, LBTF_AP_MODE);
 311                 break;
 312         case NL80211_IFTYPE_STATION:
 313                 lbtf_set_mode(priv, LBTF_STA_MODE);
 314                 break;
 315         default:
 316                 priv->vif = NULL;
 317                 return -EOPNOTSUPP;
 318         }
 319         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 320         lbtf_deb_leave(LBTF_DEB_MACOPS);
 321         return 0;
 322 }
 323
 324 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 325                         struct ieee80211_vif *vif)
 326 {
 327         struct lbtf_private *priv = hw->priv;
 328         lbtf_deb_enter(LBTF_DEB_MACOPS);
 329
 330         if (priv->vif->type == NL80211_IFTYPE_AP ||
 331             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 332                 lbtf_beacon_ctrl(priv, 0, 0);
 333         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 334         lbtf_set_bssid(priv, 0, NULL);
 335         priv->vif = NULL;
 336         lbtf_deb_leave(LBTF_DEB_MACOPS);
 337 }
 338
 339 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 340 {
 341         struct lbtf_private *priv = hw->priv;
 342         struct ieee80211_conf *conf = &hw->conf;
 343         lbtf_deb_enter(LBTF_DEB_MACOPS);
 344
 345         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 346                 priv->cur_freq = conf->chandef.chan->center_freq;
 347                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 348         }
 349         lbtf_deb_leave(LBTF_DEB_MACOPS);
 350         return 0;
 351 }
 352
 353 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 354                                      struct netdev_hw_addr_list *mc_list)
 355 {
 356         struct lbtf_private *priv = hw->priv;
 357         int i;
 358         struct netdev_hw_addr *ha;
 359         int mc_count = netdev_hw_addr_list_count(mc_list);
 360
 361         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 362                 return mc_count;
 363
 364         priv->nr_of_multicastmacaddr = mc_count;
 365         i = 0;
 366         netdev_hw_addr_list_for_each(ha, mc_list)
 367                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 368
 369         return mc_count;
 370 }
 371
 372 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 373 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 374                         unsigned int changed_flags,
 375                         unsigned int *new_flags,
 376                         u64 multicast)
 377 {
 378         struct lbtf_private *priv = hw->priv;
 379         int old_mac_control = priv->mac_control;
 380
 381         lbtf_deb_enter(LBTF_DEB_MACOPS);
 382
 383         changed_flags &= SUPPORTED_FIF_FLAGS;
 384         *new_flags &= SUPPORTED_FIF_FLAGS;
 385
 386         if (!changed_flags) {
 387                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 388                 return;
 389         }
 390
 391         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 392         if (*new_flags & (FIF_ALLMULTI) ||
 393             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 394                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 395                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 396         } else if (multicast) {
 397                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 398                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 399                 lbtf_cmd_set_mac_multicast_addr(priv);
 400         } else {
 401                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 402                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 403                 if (priv->nr_of_multicastmacaddr) {
 404                         priv->nr_of_multicastmacaddr = 0;
 405                         lbtf_cmd_set_mac_multicast_addr(priv);
 406                 }
 407         }
 408
 409
 410         if (priv->mac_control != old_mac_control)
 411                 lbtf_set_mac_control(priv);
 412
 413         lbtf_deb_leave(LBTF_DEB_MACOPS);
 414 }
 415
 416 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 417                         struct ieee80211_vif *vif,
 418                         struct ieee80211_bss_conf *bss_conf,
 419                         u32 changes)
 420 {
 421         struct lbtf_private *priv = hw->priv;
 422         struct sk_buff *beacon;
 423         lbtf_deb_enter(LBTF_DEB_MACOPS);
 424
 425         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 426                 switch (priv->vif->type) {
 427                 case NL80211_IFTYPE_AP:
 428                 case NL80211_IFTYPE_MESH_POINT:
 429                         beacon = ieee80211_beacon_get(hw, vif);
 430                         if (beacon) {
 431                                 lbtf_beacon_set(priv, beacon);
 432                                 kfree_skb(beacon);
 433                                 lbtf_beacon_ctrl(priv, 1,
 434                                                  bss_conf->beacon_int);
 435                         }
 436                         break;
 437                 default:
 438                         break;
 439                 }
 440         }
 441
 442         if (changes & BSS_CHANGED_BSSID) {
 443                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 444                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 445         }
 446
 447         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 448                 if (bss_conf->use_short_preamble)
 449                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 450                 else
 451                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 452                 lbtf_set_radio_control(priv);
 453         }
 454
 455         lbtf_deb_leave(LBTF_DEB_MACOPS);
 456 }
 457
 458 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 459                                 struct survey_info *survey)
 460 {
 461         struct lbtf_private *priv = hw->priv;
 462         struct ieee80211_conf *conf = &hw->conf;
 463
 464         if (idx != 0)
 465                 return -ENOENT;
 466
 467         survey->channel = conf->chandef.chan;
 468         survey->filled = SURVEY_INFO_NOISE_DBM;
 469         survey->noise = priv->noise;
 470
 471         return 0;
 472 }
 473
 474 static const struct ieee80211_ops lbtf_ops = {
 475         .tx                     = lbtf_op_tx,
 476         .start                  = lbtf_op_start,
 477         .stop                   = lbtf_op_stop,
 478         .add_interface          = lbtf_op_add_interface,
 479         .remove_interface       = lbtf_op_remove_interface,
 480         .config                 = lbtf_op_config,
 481         .prepare_multicast      = lbtf_op_prepare_multicast,
 482         .configure_filter       = lbtf_op_configure_filter,
 483         .bss_info_changed       = lbtf_op_bss_info_changed,
 484         .get_survey             = lbtf_op_get_survey,
 485 };
 486
 487 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 488 {
 489         struct ieee80211_rx_status stats;
 490         struct rxpd *prxpd;
 491         int need_padding;
 492         struct ieee80211_hdr *hdr;
 493
 494         lbtf_deb_enter(LBTF_DEB_RX);
 495
 496         if (priv->radioon != RADIO_ON) {
 497                 lbtf_deb_rx("rx before we turned on the radio");
 498                 goto done;
 499         }
 500
 501         prxpd = (struct rxpd *) skb->data;
 502
 503         memset(&stats, 0, sizeof(stats));
 504         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 505                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 506         stats.freq = priv->cur_freq;
 507         stats.band = NL80211_BAND_2GHZ;
 508         stats.signal = prxpd->snr - prxpd->nf;
 509         priv->noise = prxpd->nf;
 510         /* Marvell rate index has a hole at value 4 */
 511         if (prxpd->rx_rate > 4)
 512                 --prxpd->rx_rate;
 513         stats.rate_idx = prxpd->rx_rate;
 514         skb_pull(skb, sizeof(struct rxpd));
 515
 516         hdr = (struct ieee80211_hdr *)skb->data;
 517
 518         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 519         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 520         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 521                         (*ieee80211_get_qos_ctl(hdr) &
 522                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 523
 524         if (need_padding) {
 525                 memmove(skb->data + 2, skb->data, skb->len);
 526                 skb_reserve(skb, 2);
 527         }
 528
 529         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 530
 531         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 532                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 533         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 534                      min_t(unsigned int, skb->len, 100));
 535
 536         ieee80211_rx_irqsafe(priv->hw, skb);
 537
 538 done:
 539         lbtf_deb_leave(LBTF_DEB_RX);
 540         return 0;
 541 }
 542 EXPORT_SYMBOL_GPL(lbtf_rx);
 543
 544 /*
 545  * lbtf_add_card: Add and initialize the card.
 546  *
 547  *  Returns: pointer to struct lbtf_priv.
 548  */
 549 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
 550                                    const struct lbtf_ops *ops)
 551 {
 552         struct ieee80211_hw *hw;
 553         struct lbtf_private *priv = NULL;
 554
 555         lbtf_deb_enter(LBTF_DEB_MAIN);
 556
 557         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 558         if (!hw)
 559                 goto done;
 560
 561         priv = hw->priv;
 562         if (lbtf_init_adapter(priv))
 563                 goto err_init_adapter;
 564
 565         priv->hw = hw;
 566         priv->card = card;
 567         priv->ops = ops;
 568         priv->tx_skb = NULL;
 569         priv->radioon = RADIO_OFF;
 570
 571         hw->queues = 1;
 572         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 573         ieee80211_hw_set(hw, SIGNAL_DBM);
 574         hw->extra_tx_headroom = sizeof(struct txpd);
 575         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 576         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 577         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 578         priv->band.bitrates = priv->rates;
 579         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 580         priv->band.channels = priv->channels;
 581         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 582         hw->wiphy->interface_modes =
 583                 BIT(NL80211_IFTYPE_STATION) |
 584                 BIT(NL80211_IFTYPE_ADHOC);
 585         skb_queue_head_init(&priv->bc_ps_buf);
 586
 587         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 588
 589         SET_IEEE80211_DEV(hw, dmdev);
 590
 591         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 592         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 593
 594         if (priv->ops->hw_prog_firmware(priv)) {
 595                 lbtf_deb_usbd(dmdev, "Error programming the firmware\n");
 596                 priv->ops->hw_reset_device(priv);
 597                 goto err_init_adapter;
 598         }
 599
 600         eth_broadcast_addr(priv->current_addr);
 601         if (lbtf_update_hw_spec(priv))
 602                 goto err_init_adapter;
 603
 604         if (priv->fwrelease < LBTF_FW_VER_MIN ||
 605             priv->fwrelease > LBTF_FW_VER_MAX) {
 606                 goto err_init_adapter;
 607         }
 608
 609         /* The firmware seems to start with the radio enabled. Turn it
 610          * off before an actual mac80211 start callback is invoked.
 611          */
 612         lbtf_set_radio_control(priv);
 613
 614         if (ieee80211_register_hw(hw))
 615                 goto err_init_adapter;
 616
 617         dev_info(dmdev, "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 618         goto done;
 619
 620 err_init_adapter:
 621         lbtf_free_adapter(priv);
 622         ieee80211_free_hw(hw);
 623         priv = NULL;
 624
 625 done:
 626         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 627         return priv;
 628 }
 629 EXPORT_SYMBOL_GPL(lbtf_add_card);
 630
 631
 632 int lbtf_remove_card(struct lbtf_private *priv)
 633 {
 634         struct ieee80211_hw *hw = priv->hw;
 635
 636         lbtf_deb_enter(LBTF_DEB_MAIN);
 637
 638         priv->surpriseremoved = 1;
 639         del_timer(&priv->command_timer);
 640         lbtf_free_adapter(priv);
 641         priv->hw = NULL;
 642         ieee80211_unregister_hw(hw);
 643         ieee80211_free_hw(hw);
 644
 645         lbtf_deb_leave(LBTF_DEB_MAIN);
 646         return 0;
 647 }
 648 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 649
 650 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 651 {
 652         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 653
 654         ieee80211_tx_info_clear_status(info);
 655         /*
 656          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 657          * default pid rc algorithm.
 658          *
 659          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 660          */
 661         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 662                 info->flags |= IEEE80211_TX_STAT_ACK;
 663         skb_pull(priv->tx_skb, sizeof(struct txpd));
 664         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 665         priv->tx_skb = NULL;
 666         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 667                 ieee80211_wake_queues(priv->hw);
 668         else
 669                 queue_work(lbtf_wq, &priv->tx_work);
 670 }
 671 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 672
 673 void lbtf_bcn_sent(struct lbtf_private *priv)
 674 {
 675         struct sk_buff *skb = NULL;
 676
 677         if (priv->vif->type != NL80211_IFTYPE_AP)
 678                 return;
 679
 680         if (skb_queue_empty(&priv->bc_ps_buf)) {
 681                 bool tx_buff_bc = false;
 682
 683                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 684                         skb_queue_tail(&priv->bc_ps_buf, skb);
 685                         tx_buff_bc = true;
 686                 }
 687                 if (tx_buff_bc) {
 688                         ieee80211_stop_queues(priv->hw);
 689                         queue_work(lbtf_wq, &priv->tx_work);
 690                 }
 691         }
 692
 693         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 694
 695         if (skb) {
 696                 lbtf_beacon_set(priv, skb);
 697                 kfree_skb(skb);
 698         }
 699 }
 700 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 701
 702 static int __init lbtf_init_module(void)
 703 {
 704         lbtf_deb_enter(LBTF_DEB_MAIN);
 705         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 706         if (lbtf_wq == NULL) {
 707                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 708                 return -ENOMEM;
 709         }
 710         lbtf_deb_leave(LBTF_DEB_MAIN);
 711         return 0;
 712 }
 713
 714 static void __exit lbtf_exit_module(void)
 715 {
 716         lbtf_deb_enter(LBTF_DEB_MAIN);
 717         destroy_workqueue(lbtf_wq);
 718         lbtf_deb_leave(LBTF_DEB_MAIN);
 719 }
 720
 721 module_init(lbtf_init_module);
 722 module_exit(lbtf_exit_module);
 723
 724 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 725 MODULE_AUTHOR("Cozybit Inc.");
 726 MODULE_LICENSE("GPL");