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         if (!priv->fw_ready) {
 122                 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
 123                 return;
 124         }
 125
 126         /* Execute the next command */
 127         if (!priv->cur_cmd)
 128                 lbtf_execute_next_command(priv);
 129
 130         lbtf_deb_leave(LBTF_DEB_CMD);
 131 }
 132
 133 /**
 134  *  lbtf_setup_firmware: initialize firmware.
 135  *
 136  *  @priv    A pointer to struct lbtf_private structure
 137  *
 138  *  Returns: 0 on success.
 139  */
 140 static int lbtf_setup_firmware(struct lbtf_private *priv)
 141 {
 142         int ret = -1;
 143
 144         lbtf_deb_enter(LBTF_DEB_FW);
 145         /*
 146          * Read priv address from HW
 147          */
 148         eth_broadcast_addr(priv->current_addr);
 149         ret = lbtf_update_hw_spec(priv);
 150         if (ret) {
 151                 ret = -1;
 152                 goto done;
 153         }
 154
 155         lbtf_set_mac_control(priv);
 156         lbtf_set_radio_control(priv);
 157
 158         ret = 0;
 159 done:
 160         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
 161         return ret;
 162 }
 163
 164 /**
 165  *  This function handles the timeout of command sending.
 166  *  It will re-send the same command again.
 167  */
 168 static void command_timer_fn(struct timer_list *t)
 169 {
 170         struct lbtf_private *priv = from_timer(priv, t, command_timer);
 171         unsigned long flags;
 172         lbtf_deb_enter(LBTF_DEB_CMD);
 173
 174         spin_lock_irqsave(&priv->driver_lock, flags);
 175
 176         if (!priv->cur_cmd) {
 177                 printk(KERN_DEBUG "libertastf: command timer expired; "
 178                                   "no pending command\n");
 179                 goto out;
 180         }
 181
 182         printk(KERN_DEBUG "libertas: command %x timed out\n",
 183                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 184
 185         priv->cmd_timed_out = 1;
 186         queue_work(lbtf_wq, &priv->cmd_work);
 187 out:
 188         spin_unlock_irqrestore(&priv->driver_lock, flags);
 189         lbtf_deb_leave(LBTF_DEB_CMD);
 190 }
 191
 192 static int lbtf_init_adapter(struct lbtf_private *priv)
 193 {
 194         lbtf_deb_enter(LBTF_DEB_MAIN);
 195         eth_broadcast_addr(priv->current_addr);
 196         mutex_init(&priv->lock);
 197
 198         priv->vif = NULL;
 199         timer_setup(&priv->command_timer, command_timer_fn, 0);
 200
 201         INIT_LIST_HEAD(&priv->cmdfreeq);
 202         INIT_LIST_HEAD(&priv->cmdpendingq);
 203
 204         spin_lock_init(&priv->driver_lock);
 205
 206         /* Allocate the command buffers */
 207         if (lbtf_allocate_cmd_buffer(priv))
 208                 return -1;
 209
 210         lbtf_deb_leave(LBTF_DEB_MAIN);
 211         return 0;
 212 }
 213
 214 static void lbtf_free_adapter(struct lbtf_private *priv)
 215 {
 216         lbtf_deb_enter(LBTF_DEB_MAIN);
 217         lbtf_free_cmd_buffer(priv);
 218         del_timer(&priv->command_timer);
 219         lbtf_deb_leave(LBTF_DEB_MAIN);
 220 }
 221
 222 static void lbtf_op_tx(struct ieee80211_hw *hw,
 223                        struct ieee80211_tx_control *control,
 224                        struct sk_buff *skb)
 225 {
 226         struct lbtf_private *priv = hw->priv;
 227
 228         priv->skb_to_tx = skb;
 229         queue_work(lbtf_wq, &priv->tx_work);
 230         /*
 231          * queue will be restarted when we receive transmission feedback if
 232          * there are no buffered multicast frames to send
 233          */
 234         ieee80211_stop_queues(priv->hw);
 235 }
 236
 237 static void lbtf_tx_work(struct work_struct *work)
 238 {
 239         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 240                                          tx_work);
 241         unsigned int len;
 242         struct ieee80211_tx_info *info;
 243         struct txpd *txpd;
 244         struct sk_buff *skb = NULL;
 245         int err;
 246
 247         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 248
 249         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 250             (!skb_queue_empty(&priv->bc_ps_buf)))
 251                 skb = skb_dequeue(&priv->bc_ps_buf);
 252         else if (priv->skb_to_tx) {
 253                 skb = priv->skb_to_tx;
 254                 priv->skb_to_tx = NULL;
 255         } else {
 256                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 257                 return;
 258         }
 259
 260         len = skb->len;
 261         info  = IEEE80211_SKB_CB(skb);
 262         txpd = skb_push(skb, sizeof(struct txpd));
 263
 264         if (priv->surpriseremoved) {
 265                 dev_kfree_skb_any(skb);
 266                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 267                 return;
 268         }
 269
 270         memset(txpd, 0, sizeof(struct txpd));
 271         /* Activate per-packet rate selection */
 272         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 273                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 274
 275         /* copy destination address from 802.11 header */
 276         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 277                 ETH_ALEN);
 278         txpd->tx_packet_length = cpu_to_le16(len);
 279         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 280         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 281         BUG_ON(priv->tx_skb);
 282         spin_lock_irq(&priv->driver_lock);
 283         priv->tx_skb = skb;
 284         err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 285         spin_unlock_irq(&priv->driver_lock);
 286         if (err) {
 287                 dev_kfree_skb_any(skb);
 288                 priv->tx_skb = NULL;
 289                 pr_err("TX error: %d", err);
 290         }
 291         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 292 }
 293
 294 static int lbtf_op_start(struct ieee80211_hw *hw)
 295 {
 296         struct lbtf_private *priv = hw->priv;
 297         void *card = priv->card;
 298         int ret = -1;
 299
 300         lbtf_deb_enter(LBTF_DEB_MACOPS);
 301
 302         if (!priv->fw_ready)
 303                 /* Upload firmware */
 304                 if (priv->hw_prog_firmware(card))
 305                         goto err_prog_firmware;
 306
 307         /* poke the firmware */
 308         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 309         priv->radioon = RADIO_ON;
 310         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 311         ret = lbtf_setup_firmware(priv);
 312         if (ret)
 313                 goto err_prog_firmware;
 314
 315         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
 316             (priv->fwrelease > LBTF_FW_VER_MAX)) {
 317                 ret = -1;
 318                 goto err_prog_firmware;
 319         }
 320
 321         printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 322         lbtf_deb_leave(LBTF_DEB_MACOPS);
 323         return 0;
 324
 325 err_prog_firmware:
 326         priv->hw_reset_device(card);
 327         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programming fw; ret=%d", ret);
 328         return ret;
 329 }
 330
 331 static void lbtf_op_stop(struct ieee80211_hw *hw)
 332 {
 333         struct lbtf_private *priv = hw->priv;
 334         unsigned long flags;
 335         struct sk_buff *skb;
 336
 337         struct cmd_ctrl_node *cmdnode;
 338
 339         lbtf_deb_enter(LBTF_DEB_MACOPS);
 340
 341         /* Flush pending command nodes */
 342         spin_lock_irqsave(&priv->driver_lock, flags);
 343         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 344                 cmdnode->result = -ENOENT;
 345                 cmdnode->cmdwaitqwoken = 1;
 346                 wake_up_interruptible(&cmdnode->cmdwait_q);
 347         }
 348
 349         spin_unlock_irqrestore(&priv->driver_lock, flags);
 350         cancel_work_sync(&priv->cmd_work);
 351         cancel_work_sync(&priv->tx_work);
 352         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 353                 dev_kfree_skb_any(skb);
 354         priv->radioon = RADIO_OFF;
 355         lbtf_set_radio_control(priv);
 356
 357         lbtf_deb_leave(LBTF_DEB_MACOPS);
 358 }
 359
 360 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 361                         struct ieee80211_vif *vif)
 362 {
 363         struct lbtf_private *priv = hw->priv;
 364         lbtf_deb_enter(LBTF_DEB_MACOPS);
 365         if (priv->vif != NULL)
 366                 return -EOPNOTSUPP;
 367
 368         priv->vif = vif;
 369         switch (vif->type) {
 370         case NL80211_IFTYPE_MESH_POINT:
 371         case NL80211_IFTYPE_AP:
 372                 lbtf_set_mode(priv, LBTF_AP_MODE);
 373                 break;
 374         case NL80211_IFTYPE_STATION:
 375                 lbtf_set_mode(priv, LBTF_STA_MODE);
 376                 break;
 377         default:
 378                 priv->vif = NULL;
 379                 return -EOPNOTSUPP;
 380         }
 381         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 382         lbtf_deb_leave(LBTF_DEB_MACOPS);
 383         return 0;
 384 }
 385
 386 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 387                         struct ieee80211_vif *vif)
 388 {
 389         struct lbtf_private *priv = hw->priv;
 390         lbtf_deb_enter(LBTF_DEB_MACOPS);
 391
 392         if (priv->vif->type == NL80211_IFTYPE_AP ||
 393             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 394                 lbtf_beacon_ctrl(priv, 0, 0);
 395         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 396         lbtf_set_bssid(priv, 0, NULL);
 397         priv->vif = NULL;
 398         lbtf_deb_leave(LBTF_DEB_MACOPS);
 399 }
 400
 401 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 402 {
 403         struct lbtf_private *priv = hw->priv;
 404         struct ieee80211_conf *conf = &hw->conf;
 405         lbtf_deb_enter(LBTF_DEB_MACOPS);
 406
 407         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 408                 priv->cur_freq = conf->chandef.chan->center_freq;
 409                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 410         }
 411         lbtf_deb_leave(LBTF_DEB_MACOPS);
 412         return 0;
 413 }
 414
 415 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 416                                      struct netdev_hw_addr_list *mc_list)
 417 {
 418         struct lbtf_private *priv = hw->priv;
 419         int i;
 420         struct netdev_hw_addr *ha;
 421         int mc_count = netdev_hw_addr_list_count(mc_list);
 422
 423         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 424                 return mc_count;
 425
 426         priv->nr_of_multicastmacaddr = mc_count;
 427         i = 0;
 428         netdev_hw_addr_list_for_each(ha, mc_list)
 429                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 430
 431         return mc_count;
 432 }
 433
 434 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 435 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 436                         unsigned int changed_flags,
 437                         unsigned int *new_flags,
 438                         u64 multicast)
 439 {
 440         struct lbtf_private *priv = hw->priv;
 441         int old_mac_control = priv->mac_control;
 442
 443         lbtf_deb_enter(LBTF_DEB_MACOPS);
 444
 445         changed_flags &= SUPPORTED_FIF_FLAGS;
 446         *new_flags &= SUPPORTED_FIF_FLAGS;
 447
 448         if (!changed_flags) {
 449                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 450                 return;
 451         }
 452
 453         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 454         if (*new_flags & (FIF_ALLMULTI) ||
 455             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 456                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 457                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 458         } else if (multicast) {
 459                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 460                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 461                 lbtf_cmd_set_mac_multicast_addr(priv);
 462         } else {
 463                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 464                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 465                 if (priv->nr_of_multicastmacaddr) {
 466                         priv->nr_of_multicastmacaddr = 0;
 467                         lbtf_cmd_set_mac_multicast_addr(priv);
 468                 }
 469         }
 470
 471
 472         if (priv->mac_control != old_mac_control)
 473                 lbtf_set_mac_control(priv);
 474
 475         lbtf_deb_leave(LBTF_DEB_MACOPS);
 476 }
 477
 478 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 479                         struct ieee80211_vif *vif,
 480                         struct ieee80211_bss_conf *bss_conf,
 481                         u32 changes)
 482 {
 483         struct lbtf_private *priv = hw->priv;
 484         struct sk_buff *beacon;
 485         lbtf_deb_enter(LBTF_DEB_MACOPS);
 486
 487         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 488                 switch (priv->vif->type) {
 489                 case NL80211_IFTYPE_AP:
 490                 case NL80211_IFTYPE_MESH_POINT:
 491                         beacon = ieee80211_beacon_get(hw, vif);
 492                         if (beacon) {
 493                                 lbtf_beacon_set(priv, beacon);
 494                                 kfree_skb(beacon);
 495                                 lbtf_beacon_ctrl(priv, 1,
 496                                                  bss_conf->beacon_int);
 497                         }
 498                         break;
 499                 default:
 500                         break;
 501                 }
 502         }
 503
 504         if (changes & BSS_CHANGED_BSSID) {
 505                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 506                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 507         }
 508
 509         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 510                 if (bss_conf->use_short_preamble)
 511                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 512                 else
 513                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 514                 lbtf_set_radio_control(priv);
 515         }
 516
 517         lbtf_deb_leave(LBTF_DEB_MACOPS);
 518 }
 519
 520 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 521                                 struct survey_info *survey)
 522 {
 523         struct lbtf_private *priv = hw->priv;
 524         struct ieee80211_conf *conf = &hw->conf;
 525
 526         if (idx != 0)
 527                 return -ENOENT;
 528
 529         survey->channel = conf->chandef.chan;
 530         survey->filled = SURVEY_INFO_NOISE_DBM;
 531         survey->noise = priv->noise;
 532
 533         return 0;
 534 }
 535
 536 static const struct ieee80211_ops lbtf_ops = {
 537         .tx                     = lbtf_op_tx,
 538         .start                  = lbtf_op_start,
 539         .stop                   = lbtf_op_stop,
 540         .add_interface          = lbtf_op_add_interface,
 541         .remove_interface       = lbtf_op_remove_interface,
 542         .config                 = lbtf_op_config,
 543         .prepare_multicast      = lbtf_op_prepare_multicast,
 544         .configure_filter       = lbtf_op_configure_filter,
 545         .bss_info_changed       = lbtf_op_bss_info_changed,
 546         .get_survey             = lbtf_op_get_survey,
 547 };
 548
 549 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 550 {
 551         struct ieee80211_rx_status stats;
 552         struct rxpd *prxpd;
 553         int need_padding;
 554         unsigned int flags;
 555         struct ieee80211_hdr *hdr;
 556
 557         lbtf_deb_enter(LBTF_DEB_RX);
 558
 559         prxpd = (struct rxpd *) skb->data;
 560
 561         memset(&stats, 0, sizeof(stats));
 562         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 563                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 564         stats.freq = priv->cur_freq;
 565         stats.band = NL80211_BAND_2GHZ;
 566         stats.signal = prxpd->snr;
 567         priv->noise = prxpd->nf;
 568         /* Marvell rate index has a hole at value 4 */
 569         if (prxpd->rx_rate > 4)
 570                 --prxpd->rx_rate;
 571         stats.rate_idx = prxpd->rx_rate;
 572         skb_pull(skb, sizeof(struct rxpd));
 573
 574         hdr = (struct ieee80211_hdr *)skb->data;
 575         flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
 576
 577         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 578         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 579         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 580                         (*ieee80211_get_qos_ctl(hdr) &
 581                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 582
 583         if (need_padding) {
 584                 memmove(skb->data + 2, skb->data, skb->len);
 585                 skb_reserve(skb, 2);
 586         }
 587
 588         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 589
 590         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 591                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 592         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 593                      min_t(unsigned int, skb->len, 100));
 594
 595         ieee80211_rx_irqsafe(priv->hw, skb);
 596
 597         lbtf_deb_leave(LBTF_DEB_RX);
 598         return 0;
 599 }
 600 EXPORT_SYMBOL_GPL(lbtf_rx);
 601
 602 /**
 603  * lbtf_add_card: Add and initialize the card, no fw upload yet.
 604  *
 605  *  @card    A pointer to card
 606  *
 607  *  Returns: pointer to struct lbtf_priv.
 608  */
 609 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
 610 {
 611         struct ieee80211_hw *hw;
 612         struct lbtf_private *priv = NULL;
 613
 614         lbtf_deb_enter(LBTF_DEB_MAIN);
 615
 616         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 617         if (!hw)
 618                 goto done;
 619
 620         priv = hw->priv;
 621         if (lbtf_init_adapter(priv))
 622                 goto err_init_adapter;
 623
 624         priv->hw = hw;
 625         priv->card = card;
 626         priv->tx_skb = NULL;
 627
 628         hw->queues = 1;
 629         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 630         hw->extra_tx_headroom = sizeof(struct txpd);
 631         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 632         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 633         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 634         priv->band.bitrates = priv->rates;
 635         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 636         priv->band.channels = priv->channels;
 637         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 638         hw->wiphy->interface_modes =
 639                 BIT(NL80211_IFTYPE_STATION) |
 640                 BIT(NL80211_IFTYPE_ADHOC);
 641         skb_queue_head_init(&priv->bc_ps_buf);
 642
 643         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 644
 645         SET_IEEE80211_DEV(hw, dmdev);
 646
 647         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 648         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 649         if (ieee80211_register_hw(hw))
 650                 goto err_init_adapter;
 651
 652         goto done;
 653
 654 err_init_adapter:
 655         lbtf_free_adapter(priv);
 656         ieee80211_free_hw(hw);
 657         priv = NULL;
 658
 659 done:
 660         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 661         return priv;
 662 }
 663 EXPORT_SYMBOL_GPL(lbtf_add_card);
 664
 665
 666 int lbtf_remove_card(struct lbtf_private *priv)
 667 {
 668         struct ieee80211_hw *hw = priv->hw;
 669
 670         lbtf_deb_enter(LBTF_DEB_MAIN);
 671
 672         priv->surpriseremoved = 1;
 673         del_timer(&priv->command_timer);
 674         lbtf_free_adapter(priv);
 675         priv->hw = NULL;
 676         ieee80211_unregister_hw(hw);
 677         ieee80211_free_hw(hw);
 678
 679     lbtf_deb_leave(LBTF_DEB_MAIN);
 680         return 0;
 681 }
 682 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 683
 684 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 685 {
 686         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 687
 688         ieee80211_tx_info_clear_status(info);
 689         /*
 690          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 691          * default pid rc algorithm.
 692          *
 693          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 694          */
 695         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 696                 info->flags |= IEEE80211_TX_STAT_ACK;
 697         skb_pull(priv->tx_skb, sizeof(struct txpd));
 698         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 699         priv->tx_skb = NULL;
 700         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 701                 ieee80211_wake_queues(priv->hw);
 702         else
 703                 queue_work(lbtf_wq, &priv->tx_work);
 704 }
 705 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 706
 707 void lbtf_bcn_sent(struct lbtf_private *priv)
 708 {
 709         struct sk_buff *skb = NULL;
 710
 711         if (priv->vif->type != NL80211_IFTYPE_AP)
 712                 return;
 713
 714         if (skb_queue_empty(&priv->bc_ps_buf)) {
 715                 bool tx_buff_bc = false;
 716
 717                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 718                         skb_queue_tail(&priv->bc_ps_buf, skb);
 719                         tx_buff_bc = true;
 720                 }
 721                 if (tx_buff_bc) {
 722                         ieee80211_stop_queues(priv->hw);
 723                         queue_work(lbtf_wq, &priv->tx_work);
 724                 }
 725         }
 726
 727         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 728
 729         if (skb) {
 730                 lbtf_beacon_set(priv, skb);
 731                 kfree_skb(skb);
 732         }
 733 }
 734 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 735
 736 static int __init lbtf_init_module(void)
 737 {
 738         lbtf_deb_enter(LBTF_DEB_MAIN);
 739         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 740         if (lbtf_wq == NULL) {
 741                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 742                 return -ENOMEM;
 743         }
 744         lbtf_deb_leave(LBTF_DEB_MAIN);
 745         return 0;
 746 }
 747
 748 static void __exit lbtf_exit_module(void)
 749 {
 750         lbtf_deb_enter(LBTF_DEB_MAIN);
 751         destroy_workqueue(lbtf_wq);
 752         lbtf_deb_leave(LBTF_DEB_MAIN);
 753 }
 754
 755 module_init(lbtf_init_module);
 756 module_exit(lbtf_exit_module);
 757
 758 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 759 MODULE_AUTHOR("Cozybit Inc.");
 760 MODULE_LICENSE("GPL");