drivers/net/wireless/marvell/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 <linux/module.h>
  17 #include "libertas_tf.h"
  18
  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 struct workqueue_struct *lbtf_wq;
  30
  31 static const struct ieee80211_channel lbtf_channels[] = {
  32         { .center_freq = 2412, .hw_value = 1 },
  33         { .center_freq = 2417, .hw_value = 2 },
  34         { .center_freq = 2422, .hw_value = 3 },
  35         { .center_freq = 2427, .hw_value = 4 },
  36         { .center_freq = 2432, .hw_value = 5 },
  37         { .center_freq = 2437, .hw_value = 6 },
  38         { .center_freq = 2442, .hw_value = 7 },
  39         { .center_freq = 2447, .hw_value = 8 },
  40         { .center_freq = 2452, .hw_value = 9 },
  41         { .center_freq = 2457, .hw_value = 10 },
  42         { .center_freq = 2462, .hw_value = 11 },
  43         { .center_freq = 2467, .hw_value = 12 },
  44         { .center_freq = 2472, .hw_value = 13 },
  45         { .center_freq = 2484, .hw_value = 14 },
  46 };
  47
  48 /* This table contains the hardware specific values for the modulation rates. */
  49 static const struct ieee80211_rate lbtf_rates[] = {
  50         { .bitrate = 10,
  51           .hw_value = 0, },
  52         { .bitrate = 20,
  53           .hw_value = 1,
  54           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  55         { .bitrate = 55,
  56           .hw_value = 2,
  57           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  58         { .bitrate = 110,
  59           .hw_value = 3,
  60           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  61         { .bitrate = 60,
  62           .hw_value = 5,
  63           .flags = 0 },
  64         { .bitrate = 90,
  65           .hw_value = 6,
  66           .flags = 0 },
  67         { .bitrate = 120,
  68           .hw_value = 7,
  69           .flags = 0 },
  70         { .bitrate = 180,
  71           .hw_value = 8,
  72           .flags = 0 },
  73         { .bitrate = 240,
  74           .hw_value = 9,
  75           .flags = 0 },
  76         { .bitrate = 360,
  77           .hw_value = 10,
  78           .flags = 0 },
  79         { .bitrate = 480,
  80           .hw_value = 11,
  81           .flags = 0 },
  82         { .bitrate = 540,
  83           .hw_value = 12,
  84           .flags = 0 },
  85 };
  86
  87 static void lbtf_cmd_work(struct work_struct *work)
  88 {
  89         struct lbtf_private *priv = container_of(work, struct lbtf_private,
  90                                          cmd_work);
  91
  92         lbtf_deb_enter(LBTF_DEB_CMD);
  93
  94         spin_lock_irq(&priv->driver_lock);
  95         /* command response? */
  96         if (priv->cmd_response_rxed) {
  97                 priv->cmd_response_rxed = 0;
  98                 spin_unlock_irq(&priv->driver_lock);
  99                 lbtf_process_rx_command(priv);
 100                 spin_lock_irq(&priv->driver_lock);
 101         }
 102
 103         if (priv->cmd_timed_out && priv->cur_cmd) {
 104                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 105
 106                 if (++priv->nr_retries > 10) {
 107                         lbtf_complete_command(priv, cmdnode,
 108                                               -ETIMEDOUT);
 109                         priv->nr_retries = 0;
 110                 } else {
 111                         priv->cur_cmd = NULL;
 112
 113                         /* Stick it back at the _top_ of the pending
 114                          * queue for immediate resubmission */
 115                         list_add(&cmdnode->list, &priv->cmdpendingq);
 116                 }
 117         }
 118         priv->cmd_timed_out = 0;
 119         spin_unlock_irq(&priv->driver_lock);
 120
 121         /* Execute the next command */
 122         if (!priv->cur_cmd)
 123                 lbtf_execute_next_command(priv);
 124
 125         lbtf_deb_leave(LBTF_DEB_CMD);
 126 }
 127
 128 /**
 129  *  This function handles the timeout of command sending.
 130  *  It will re-send the same command again.
 131  */
 132 static void command_timer_fn(struct timer_list *t)
 133 {
 134         struct lbtf_private *priv = from_timer(priv, t, command_timer);
 135         unsigned long flags;
 136         lbtf_deb_enter(LBTF_DEB_CMD);
 137
 138         spin_lock_irqsave(&priv->driver_lock, flags);
 139
 140         if (!priv->cur_cmd) {
 141                 printk(KERN_DEBUG "libertastf: command timer expired; "
 142                                   "no pending command\n");
 143                 goto out;
 144         }
 145
 146         printk(KERN_DEBUG "libertas: command %x timed out\n",
 147                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 148
 149         priv->cmd_timed_out = 1;
 150         queue_work(lbtf_wq, &priv->cmd_work);
 151 out:
 152         spin_unlock_irqrestore(&priv->driver_lock, flags);
 153         lbtf_deb_leave(LBTF_DEB_CMD);
 154 }
 155
 156 static int lbtf_init_adapter(struct lbtf_private *priv)
 157 {
 158         lbtf_deb_enter(LBTF_DEB_MAIN);
 159         eth_broadcast_addr(priv->current_addr);
 160         mutex_init(&priv->lock);
 161
 162         priv->vif = NULL;
 163         timer_setup(&priv->command_timer, command_timer_fn, 0);
 164
 165         INIT_LIST_HEAD(&priv->cmdfreeq);
 166         INIT_LIST_HEAD(&priv->cmdpendingq);
 167
 168         spin_lock_init(&priv->driver_lock);
 169
 170         /* Allocate the command buffers */
 171         if (lbtf_allocate_cmd_buffer(priv))
 172                 return -1;
 173
 174         lbtf_deb_leave(LBTF_DEB_MAIN);
 175         return 0;
 176 }
 177
 178 static void lbtf_free_adapter(struct lbtf_private *priv)
 179 {
 180         lbtf_deb_enter(LBTF_DEB_MAIN);
 181         lbtf_free_cmd_buffer(priv);
 182         del_timer(&priv->command_timer);
 183         lbtf_deb_leave(LBTF_DEB_MAIN);
 184 }
 185
 186 static void lbtf_op_tx(struct ieee80211_hw *hw,
 187                        struct ieee80211_tx_control *control,
 188                        struct sk_buff *skb)
 189 {
 190         struct lbtf_private *priv = hw->priv;
 191
 192         priv->skb_to_tx = skb;
 193         queue_work(lbtf_wq, &priv->tx_work);
 194         /*
 195          * queue will be restarted when we receive transmission feedback if
 196          * there are no buffered multicast frames to send
 197          */
 198         ieee80211_stop_queues(priv->hw);
 199 }
 200
 201 static void lbtf_tx_work(struct work_struct *work)
 202 {
 203         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 204                                          tx_work);
 205         unsigned int len;
 206         struct ieee80211_tx_info *info;
 207         struct txpd *txpd;
 208         struct sk_buff *skb = NULL;
 209         int err;
 210
 211         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 212
 213         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 214             (!skb_queue_empty(&priv->bc_ps_buf)))
 215                 skb = skb_dequeue(&priv->bc_ps_buf);
 216         else if (priv->skb_to_tx) {
 217                 skb = priv->skb_to_tx;
 218                 priv->skb_to_tx = NULL;
 219         } else {
 220                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 221                 return;
 222         }
 223
 224         len = skb->len;
 225         info  = IEEE80211_SKB_CB(skb);
 226         txpd = skb_push(skb, sizeof(struct txpd));
 227
 228         if (priv->surpriseremoved) {
 229                 dev_kfree_skb_any(skb);
 230                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 231                 return;
 232         }
 233
 234         memset(txpd, 0, sizeof(struct txpd));
 235         /* Activate per-packet rate selection */
 236         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 237                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 238
 239         /* copy destination address from 802.11 header */
 240         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 241                 ETH_ALEN);
 242         txpd->tx_packet_length = cpu_to_le16(len);
 243         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 244         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 245         BUG_ON(priv->tx_skb);
 246         spin_lock_irq(&priv->driver_lock);
 247         priv->tx_skb = skb;
 248         err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 249         spin_unlock_irq(&priv->driver_lock);
 250         if (err) {
 251                 dev_kfree_skb_any(skb);
 252                 priv->tx_skb = NULL;
 253                 pr_err("TX error: %d", err);
 254         }
 255         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 256 }
 257
 258 static int lbtf_op_start(struct ieee80211_hw *hw)
 259 {
 260         struct lbtf_private *priv = hw->priv;
 261
 262         lbtf_deb_enter(LBTF_DEB_MACOPS);
 263
 264         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 265         priv->radioon = RADIO_ON;
 266         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 267         lbtf_set_mac_control(priv);
 268         lbtf_set_radio_control(priv);
 269
 270         lbtf_deb_leave(LBTF_DEB_MACOPS);
 271         return 0;
 272 }
 273
 274 static void lbtf_op_stop(struct ieee80211_hw *hw)
 275 {
 276         struct lbtf_private *priv = hw->priv;
 277         unsigned long flags;
 278         struct sk_buff *skb;
 279
 280         struct cmd_ctrl_node *cmdnode;
 281
 282         lbtf_deb_enter(LBTF_DEB_MACOPS);
 283
 284         /* Flush pending command nodes */
 285         spin_lock_irqsave(&priv->driver_lock, flags);
 286         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 287                 cmdnode->result = -ENOENT;
 288                 cmdnode->cmdwaitqwoken = 1;
 289                 wake_up_interruptible(&cmdnode->cmdwait_q);
 290         }
 291
 292         spin_unlock_irqrestore(&priv->driver_lock, flags);
 293         cancel_work_sync(&priv->cmd_work);
 294         cancel_work_sync(&priv->tx_work);
 295         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 296                 dev_kfree_skb_any(skb);
 297         priv->radioon = RADIO_OFF;
 298         lbtf_set_radio_control(priv);
 299
 300         lbtf_deb_leave(LBTF_DEB_MACOPS);
 301 }
 302
 303 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 304                         struct ieee80211_vif *vif)
 305 {
 306         struct lbtf_private *priv = hw->priv;
 307         lbtf_deb_enter(LBTF_DEB_MACOPS);
 308         if (priv->vif != NULL)
 309                 return -EOPNOTSUPP;
 310
 311         priv->vif = vif;
 312         switch (vif->type) {
 313         case NL80211_IFTYPE_MESH_POINT:
 314         case NL80211_IFTYPE_AP:
 315                 lbtf_set_mode(priv, LBTF_AP_MODE);
 316                 break;
 317         case NL80211_IFTYPE_STATION:
 318                 lbtf_set_mode(priv, LBTF_STA_MODE);
 319                 break;
 320         default:
 321                 priv->vif = NULL;
 322                 return -EOPNOTSUPP;
 323         }
 324         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 325         lbtf_deb_leave(LBTF_DEB_MACOPS);
 326         return 0;
 327 }
 328
 329 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 330                         struct ieee80211_vif *vif)
 331 {
 332         struct lbtf_private *priv = hw->priv;
 333         lbtf_deb_enter(LBTF_DEB_MACOPS);
 334
 335         if (priv->vif->type == NL80211_IFTYPE_AP ||
 336             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 337                 lbtf_beacon_ctrl(priv, 0, 0);
 338         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 339         lbtf_set_bssid(priv, 0, NULL);
 340         priv->vif = NULL;
 341         lbtf_deb_leave(LBTF_DEB_MACOPS);
 342 }
 343
 344 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 345 {
 346         struct lbtf_private *priv = hw->priv;
 347         struct ieee80211_conf *conf = &hw->conf;
 348         lbtf_deb_enter(LBTF_DEB_MACOPS);
 349
 350         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 351                 priv->cur_freq = conf->chandef.chan->center_freq;
 352                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 353         }
 354         lbtf_deb_leave(LBTF_DEB_MACOPS);
 355         return 0;
 356 }
 357
 358 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 359                                      struct netdev_hw_addr_list *mc_list)
 360 {
 361         struct lbtf_private *priv = hw->priv;
 362         int i;
 363         struct netdev_hw_addr *ha;
 364         int mc_count = netdev_hw_addr_list_count(mc_list);
 365
 366         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 367                 return mc_count;
 368
 369         priv->nr_of_multicastmacaddr = mc_count;
 370         i = 0;
 371         netdev_hw_addr_list_for_each(ha, mc_list)
 372                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 373
 374         return mc_count;
 375 }
 376
 377 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 378 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 379                         unsigned int changed_flags,
 380                         unsigned int *new_flags,
 381                         u64 multicast)
 382 {
 383         struct lbtf_private *priv = hw->priv;
 384         int old_mac_control = priv->mac_control;
 385
 386         lbtf_deb_enter(LBTF_DEB_MACOPS);
 387
 388         changed_flags &= SUPPORTED_FIF_FLAGS;
 389         *new_flags &= SUPPORTED_FIF_FLAGS;
 390
 391         if (!changed_flags) {
 392                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 393                 return;
 394         }
 395
 396         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 397         if (*new_flags & (FIF_ALLMULTI) ||
 398             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 399                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 400                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 401         } else if (multicast) {
 402                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 403                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 404                 lbtf_cmd_set_mac_multicast_addr(priv);
 405         } else {
 406                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 407                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 408                 if (priv->nr_of_multicastmacaddr) {
 409                         priv->nr_of_multicastmacaddr = 0;
 410                         lbtf_cmd_set_mac_multicast_addr(priv);
 411                 }
 412         }
 413
 414
 415         if (priv->mac_control != old_mac_control)
 416                 lbtf_set_mac_control(priv);
 417
 418         lbtf_deb_leave(LBTF_DEB_MACOPS);
 419 }
 420
 421 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 422                         struct ieee80211_vif *vif,
 423                         struct ieee80211_bss_conf *bss_conf,
 424                         u32 changes)
 425 {
 426         struct lbtf_private *priv = hw->priv;
 427         struct sk_buff *beacon;
 428         lbtf_deb_enter(LBTF_DEB_MACOPS);
 429
 430         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 431                 switch (priv->vif->type) {
 432                 case NL80211_IFTYPE_AP:
 433                 case NL80211_IFTYPE_MESH_POINT:
 434                         beacon = ieee80211_beacon_get(hw, vif);
 435                         if (beacon) {
 436                                 lbtf_beacon_set(priv, beacon);
 437                                 kfree_skb(beacon);
 438                                 lbtf_beacon_ctrl(priv, 1,
 439                                                  bss_conf->beacon_int);
 440                         }
 441                         break;
 442                 default:
 443                         break;
 444                 }
 445         }
 446
 447         if (changes & BSS_CHANGED_BSSID) {
 448                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 449                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 450         }
 451
 452         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 453                 if (bss_conf->use_short_preamble)
 454                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 455                 else
 456                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 457                 lbtf_set_radio_control(priv);
 458         }
 459
 460         lbtf_deb_leave(LBTF_DEB_MACOPS);
 461 }
 462
 463 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 464                                 struct survey_info *survey)
 465 {
 466         struct lbtf_private *priv = hw->priv;
 467         struct ieee80211_conf *conf = &hw->conf;
 468
 469         if (idx != 0)
 470                 return -ENOENT;
 471
 472         survey->channel = conf->chandef.chan;
 473         survey->filled = SURVEY_INFO_NOISE_DBM;
 474         survey->noise = priv->noise;
 475
 476         return 0;
 477 }
 478
 479 static const struct ieee80211_ops lbtf_ops = {
 480         .tx                     = lbtf_op_tx,
 481         .start                  = lbtf_op_start,
 482         .stop                   = lbtf_op_stop,
 483         .add_interface          = lbtf_op_add_interface,
 484         .remove_interface       = lbtf_op_remove_interface,
 485         .config                 = lbtf_op_config,
 486         .prepare_multicast      = lbtf_op_prepare_multicast,
 487         .configure_filter       = lbtf_op_configure_filter,
 488         .bss_info_changed       = lbtf_op_bss_info_changed,
 489         .get_survey             = lbtf_op_get_survey,
 490 };
 491
 492 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 493 {
 494         struct ieee80211_rx_status stats;
 495         struct rxpd *prxpd;
 496         int need_padding;
 497         struct ieee80211_hdr *hdr;
 498
 499         lbtf_deb_enter(LBTF_DEB_RX);
 500
 501         if (priv->radioon != RADIO_ON) {
 502                 lbtf_deb_rx("rx before we turned on the radio");
 503                 goto done;
 504         }
 505
 506         prxpd = (struct rxpd *) skb->data;
 507
 508         memset(&stats, 0, sizeof(stats));
 509         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 510                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 511         stats.freq = priv->cur_freq;
 512         stats.band = NL80211_BAND_2GHZ;
 513         stats.signal = prxpd->snr - prxpd->nf;
 514         priv->noise = prxpd->nf;
 515         /* Marvell rate index has a hole at value 4 */
 516         if (prxpd->rx_rate > 4)
 517                 --prxpd->rx_rate;
 518         stats.rate_idx = prxpd->rx_rate;
 519         skb_pull(skb, sizeof(struct rxpd));
 520
 521         hdr = (struct ieee80211_hdr *)skb->data;
 522
 523         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 524         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 525         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 526                         (*ieee80211_get_qos_ctl(hdr) &
 527                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 528
 529         if (need_padding) {
 530                 memmove(skb->data + 2, skb->data, skb->len);
 531                 skb_reserve(skb, 2);
 532         }
 533
 534         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 535
 536         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 537                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 538         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 539                      min_t(unsigned int, skb->len, 100));
 540
 541         ieee80211_rx_irqsafe(priv->hw, skb);
 542
 543 done:
 544         lbtf_deb_leave(LBTF_DEB_RX);
 545         return 0;
 546 }
 547 EXPORT_SYMBOL_GPL(lbtf_rx);
 548
 549 /**
 550  * lbtf_add_card: Add and initialize the card.
 551  *
 552  *  @card    A pointer to card
 553  *
 554  *  Returns: pointer to struct lbtf_priv.
 555  */
 556 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
 557                                    const struct lbtf_ops *ops)
 558 {
 559         struct ieee80211_hw *hw;
 560         struct lbtf_private *priv = NULL;
 561
 562         lbtf_deb_enter(LBTF_DEB_MAIN);
 563
 564         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 565         if (!hw)
 566                 goto done;
 567
 568         priv = hw->priv;
 569         if (lbtf_init_adapter(priv))
 570                 goto err_init_adapter;
 571
 572         priv->hw = hw;
 573         priv->card = card;
 574         priv->ops = ops;
 575         priv->tx_skb = NULL;
 576         priv->radioon = RADIO_OFF;
 577
 578         hw->queues = 1;
 579         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 580         ieee80211_hw_set(hw, SIGNAL_DBM);
 581         hw->extra_tx_headroom = sizeof(struct txpd);
 582         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 583         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 584         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 585         priv->band.bitrates = priv->rates;
 586         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 587         priv->band.channels = priv->channels;
 588         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 589         hw->wiphy->interface_modes =
 590                 BIT(NL80211_IFTYPE_STATION) |
 591                 BIT(NL80211_IFTYPE_ADHOC);
 592         skb_queue_head_init(&priv->bc_ps_buf);
 593
 594         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 595
 596         SET_IEEE80211_DEV(hw, dmdev);
 597
 598         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 599         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 600
 601         if (priv->ops->hw_prog_firmware(priv)) {
 602                 lbtf_deb_usbd(dmdev, "Error programming the firmware\n");
 603                 priv->ops->hw_reset_device(priv);
 604                 goto err_init_adapter;
 605         }
 606
 607         eth_broadcast_addr(priv->current_addr);
 608         if (lbtf_update_hw_spec(priv))
 609                 goto err_init_adapter;
 610
 611         if (priv->fwrelease < LBTF_FW_VER_MIN ||
 612             priv->fwrelease > LBTF_FW_VER_MAX) {
 613                 goto err_init_adapter;
 614         }
 615
 616         /* The firmware seems to start with the radio enabled. Turn it
 617          * off before an actual mac80211 start callback is invoked.
 618          */
 619         lbtf_set_radio_control(priv);
 620
 621         if (ieee80211_register_hw(hw))
 622                 goto err_init_adapter;
 623
 624         dev_info(dmdev, "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 625         goto done;
 626
 627 err_init_adapter:
 628         lbtf_free_adapter(priv);
 629         ieee80211_free_hw(hw);
 630         priv = NULL;
 631
 632 done:
 633         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 634         return priv;
 635 }
 636 EXPORT_SYMBOL_GPL(lbtf_add_card);
 637
 638
 639 int lbtf_remove_card(struct lbtf_private *priv)
 640 {
 641         struct ieee80211_hw *hw = priv->hw;
 642
 643         lbtf_deb_enter(LBTF_DEB_MAIN);
 644
 645         priv->surpriseremoved = 1;
 646         del_timer(&priv->command_timer);
 647         lbtf_free_adapter(priv);
 648         priv->hw = NULL;
 649         ieee80211_unregister_hw(hw);
 650         ieee80211_free_hw(hw);
 651
 652         lbtf_deb_leave(LBTF_DEB_MAIN);
 653         return 0;
 654 }
 655 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 656
 657 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 658 {
 659         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 660
 661         ieee80211_tx_info_clear_status(info);
 662         /*
 663          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 664          * default pid rc algorithm.
 665          *
 666          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 667          */
 668         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 669                 info->flags |= IEEE80211_TX_STAT_ACK;
 670         skb_pull(priv->tx_skb, sizeof(struct txpd));
 671         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 672         priv->tx_skb = NULL;
 673         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 674                 ieee80211_wake_queues(priv->hw);
 675         else
 676                 queue_work(lbtf_wq, &priv->tx_work);
 677 }
 678 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 679
 680 void lbtf_bcn_sent(struct lbtf_private *priv)
 681 {
 682         struct sk_buff *skb = NULL;
 683
 684         if (priv->vif->type != NL80211_IFTYPE_AP)
 685                 return;
 686
 687         if (skb_queue_empty(&priv->bc_ps_buf)) {
 688                 bool tx_buff_bc = false;
 689
 690                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 691                         skb_queue_tail(&priv->bc_ps_buf, skb);
 692                         tx_buff_bc = true;
 693                 }
 694                 if (tx_buff_bc) {
 695                         ieee80211_stop_queues(priv->hw);
 696                         queue_work(lbtf_wq, &priv->tx_work);
 697                 }
 698         }
 699
 700         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 701
 702         if (skb) {
 703                 lbtf_beacon_set(priv, skb);
 704                 kfree_skb(skb);
 705         }
 706 }
 707 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 708
 709 static int __init lbtf_init_module(void)
 710 {
 711         lbtf_deb_enter(LBTF_DEB_MAIN);
 712         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 713         if (lbtf_wq == NULL) {
 714                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 715                 return -ENOMEM;
 716         }
 717         lbtf_deb_leave(LBTF_DEB_MAIN);
 718         return 0;
 719 }
 720
 721 static void __exit lbtf_exit_module(void)
 722 {
 723         lbtf_deb_enter(LBTF_DEB_MAIN);
 724         destroy_workqueue(lbtf_wq);
 725         lbtf_deb_leave(LBTF_DEB_MAIN);
 726 }
 727
 728 module_init(lbtf_init_module);
 729 module_exit(lbtf_exit_module);
 730
 731 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 732 MODULE_AUTHOR("Cozybit Inc.");
 733 MODULE_LICENSE("GPL");