drivers/net/wireless/libertas_tf/main.c

   1 /*
   2  *  Copyright (C) 2008, cozybit Inc.
   3  *  Copyright (C) 2003-2006, Marvell International Ltd.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or (at
   8  *  your option) any later version.
   9  */
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/slab.h>
  13
  14 #include <linux/etherdevice.h>
  15 #include "libertas_tf.h"
  16
  17 #define DRIVER_RELEASE_VERSION "004.p0"
  18 /* thinfirm version: 5.132.X.pX */
  19 #define LBTF_FW_VER_MIN         0x05840300
  20 #define LBTF_FW_VER_MAX         0x0584ffff
  21 #define QOS_CONTROL_LEN         2
  22
  23 /* Module parameters */
  24 unsigned int lbtf_debug;
  25 EXPORT_SYMBOL_GPL(lbtf_debug);
  26 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
  27
  28 static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION
  29 #ifdef DEBUG
  30         "-dbg"
  31 #endif
  32         "";
  33
  34 struct workqueue_struct *lbtf_wq;
  35
  36 static const struct ieee80211_channel lbtf_channels[] = {
  37         { .center_freq = 2412, .hw_value = 1 },
  38         { .center_freq = 2417, .hw_value = 2 },
  39         { .center_freq = 2422, .hw_value = 3 },
  40         { .center_freq = 2427, .hw_value = 4 },
  41         { .center_freq = 2432, .hw_value = 5 },
  42         { .center_freq = 2437, .hw_value = 6 },
  43         { .center_freq = 2442, .hw_value = 7 },
  44         { .center_freq = 2447, .hw_value = 8 },
  45         { .center_freq = 2452, .hw_value = 9 },
  46         { .center_freq = 2457, .hw_value = 10 },
  47         { .center_freq = 2462, .hw_value = 11 },
  48         { .center_freq = 2467, .hw_value = 12 },
  49         { .center_freq = 2472, .hw_value = 13 },
  50         { .center_freq = 2484, .hw_value = 14 },
  51 };
  52
  53 /* This table contains the hardware specific values for the modulation rates. */
  54 static const struct ieee80211_rate lbtf_rates[] = {
  55         { .bitrate = 10,
  56           .hw_value = 0, },
  57         { .bitrate = 20,
  58           .hw_value = 1,
  59           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  60         { .bitrate = 55,
  61           .hw_value = 2,
  62           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  63         { .bitrate = 110,
  64           .hw_value = 3,
  65           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  66         { .bitrate = 60,
  67           .hw_value = 5,
  68           .flags = 0 },
  69         { .bitrate = 90,
  70           .hw_value = 6,
  71           .flags = 0 },
  72         { .bitrate = 120,
  73           .hw_value = 7,
  74           .flags = 0 },
  75         { .bitrate = 180,
  76           .hw_value = 8,
  77           .flags = 0 },
  78         { .bitrate = 240,
  79           .hw_value = 9,
  80           .flags = 0 },
  81         { .bitrate = 360,
  82           .hw_value = 10,
  83           .flags = 0 },
  84         { .bitrate = 480,
  85           .hw_value = 11,
  86           .flags = 0 },
  87         { .bitrate = 540,
  88           .hw_value = 12,
  89           .flags = 0 },
  90 };
  91
  92 static void lbtf_cmd_work(struct work_struct *work)
  93 {
  94         struct lbtf_private *priv = container_of(work, struct lbtf_private,
  95                                          cmd_work);
  96
  97         lbtf_deb_enter(LBTF_DEB_CMD);
  98
  99         spin_lock_irq(&priv->driver_lock);
 100         /* command response? */
 101         if (priv->cmd_response_rxed) {
 102                 priv->cmd_response_rxed = 0;
 103                 spin_unlock_irq(&priv->driver_lock);
 104                 lbtf_process_rx_command(priv);
 105                 spin_lock_irq(&priv->driver_lock);
 106         }
 107
 108         if (priv->cmd_timed_out && priv->cur_cmd) {
 109                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 110
 111                 if (++priv->nr_retries > 10) {
 112                         lbtf_complete_command(priv, cmdnode,
 113                                               -ETIMEDOUT);
 114                         priv->nr_retries = 0;
 115                 } else {
 116                         priv->cur_cmd = NULL;
 117
 118                         /* Stick it back at the _top_ of the pending
 119                          * queue for immediate resubmission */
 120                         list_add(&cmdnode->list, &priv->cmdpendingq);
 121                 }
 122         }
 123         priv->cmd_timed_out = 0;
 124         spin_unlock_irq(&priv->driver_lock);
 125
 126         if (!priv->fw_ready) {
 127                 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
 128                 return;
 129         }
 130
 131         /* Execute the next command */
 132         if (!priv->cur_cmd)
 133                 lbtf_execute_next_command(priv);
 134
 135         lbtf_deb_leave(LBTF_DEB_CMD);
 136 }
 137
 138 /**
 139  *  lbtf_setup_firmware: initialize firmware.
 140  *
 141  *  @priv    A pointer to struct lbtf_private structure
 142  *
 143  *  Returns: 0 on success.
 144  */
 145 static int lbtf_setup_firmware(struct lbtf_private *priv)
 146 {
 147         int ret = -1;
 148
 149         lbtf_deb_enter(LBTF_DEB_FW);
 150         /*
 151          * Read priv address from HW
 152          */
 153         memset(priv->current_addr, 0xff, ETH_ALEN);
 154         ret = lbtf_update_hw_spec(priv);
 155         if (ret) {
 156                 ret = -1;
 157                 goto done;
 158         }
 159
 160         lbtf_set_mac_control(priv);
 161         lbtf_set_radio_control(priv);
 162
 163         ret = 0;
 164 done:
 165         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
 166         return ret;
 167 }
 168
 169 /**
 170  *  This function handles the timeout of command sending.
 171  *  It will re-send the same command again.
 172  */
 173 static void command_timer_fn(unsigned long data)
 174 {
 175         struct lbtf_private *priv = (struct lbtf_private *)data;
 176         unsigned long flags;
 177         lbtf_deb_enter(LBTF_DEB_CMD);
 178
 179         spin_lock_irqsave(&priv->driver_lock, flags);
 180
 181         if (!priv->cur_cmd) {
 182                 printk(KERN_DEBUG "libertastf: command timer expired; "
 183                                   "no pending command\n");
 184                 goto out;
 185         }
 186
 187         printk(KERN_DEBUG "libertas: command %x timed out\n",
 188                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 189
 190         priv->cmd_timed_out = 1;
 191         queue_work(lbtf_wq, &priv->cmd_work);
 192 out:
 193         spin_unlock_irqrestore(&priv->driver_lock, flags);
 194         lbtf_deb_leave(LBTF_DEB_CMD);
 195 }
 196
 197 static int lbtf_init_adapter(struct lbtf_private *priv)
 198 {
 199         lbtf_deb_enter(LBTF_DEB_MAIN);
 200         memset(priv->current_addr, 0xff, ETH_ALEN);
 201         mutex_init(&priv->lock);
 202
 203         priv->vif = NULL;
 204         setup_timer(&priv->command_timer, command_timer_fn,
 205                 (unsigned long)priv);
 206
 207         INIT_LIST_HEAD(&priv->cmdfreeq);
 208         INIT_LIST_HEAD(&priv->cmdpendingq);
 209
 210         spin_lock_init(&priv->driver_lock);
 211
 212         /* Allocate the command buffers */
 213         if (lbtf_allocate_cmd_buffer(priv))
 214                 return -1;
 215
 216         lbtf_deb_leave(LBTF_DEB_MAIN);
 217         return 0;
 218 }
 219
 220 static void lbtf_free_adapter(struct lbtf_private *priv)
 221 {
 222         lbtf_deb_enter(LBTF_DEB_MAIN);
 223         lbtf_free_cmd_buffer(priv);
 224         del_timer(&priv->command_timer);
 225         lbtf_deb_leave(LBTF_DEB_MAIN);
 226 }
 227
 228 static void lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 229 {
 230         struct lbtf_private *priv = hw->priv;
 231
 232         priv->skb_to_tx = skb;
 233         queue_work(lbtf_wq, &priv->tx_work);
 234         /*
 235          * queue will be restarted when we receive transmission feedback if
 236          * there are no buffered multicast frames to send
 237          */
 238         ieee80211_stop_queues(priv->hw);
 239 }
 240
 241 static void lbtf_tx_work(struct work_struct *work)
 242 {
 243         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 244                                          tx_work);
 245         unsigned int len;
 246         struct ieee80211_tx_info *info;
 247         struct txpd *txpd;
 248         struct sk_buff *skb = NULL;
 249         int err;
 250
 251         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 252
 253         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 254             (!skb_queue_empty(&priv->bc_ps_buf)))
 255                 skb = skb_dequeue(&priv->bc_ps_buf);
 256         else if (priv->skb_to_tx) {
 257                 skb = priv->skb_to_tx;
 258                 priv->skb_to_tx = NULL;
 259         } else {
 260                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 261                 return;
 262         }
 263
 264         len = skb->len;
 265         info  = IEEE80211_SKB_CB(skb);
 266         txpd = (struct txpd *)  skb_push(skb, sizeof(struct txpd));
 267
 268         if (priv->surpriseremoved) {
 269                 dev_kfree_skb_any(skb);
 270                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 271                 return;
 272         }
 273
 274         memset(txpd, 0, sizeof(struct txpd));
 275         /* Activate per-packet rate selection */
 276         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 277                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 278
 279         /* copy destination address from 802.11 header */
 280         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 281                 ETH_ALEN);
 282         txpd->tx_packet_length = cpu_to_le16(len);
 283         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 284         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 285         BUG_ON(priv->tx_skb);
 286         spin_lock_irq(&priv->driver_lock);
 287         priv->tx_skb = skb;
 288         err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 289         spin_unlock_irq(&priv->driver_lock);
 290         if (err) {
 291                 dev_kfree_skb_any(skb);
 292                 priv->tx_skb = NULL;
 293                 pr_err("TX error: %d", err);
 294         }
 295         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 296 }
 297
 298 static int lbtf_op_start(struct ieee80211_hw *hw)
 299 {
 300         struct lbtf_private *priv = hw->priv;
 301         void *card = priv->card;
 302         int ret = -1;
 303
 304         lbtf_deb_enter(LBTF_DEB_MACOPS);
 305
 306         if (!priv->fw_ready)
 307                 /* Upload firmware */
 308                 if (priv->hw_prog_firmware(card))
 309                         goto err_prog_firmware;
 310
 311         /* poke the firmware */
 312         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 313         priv->radioon = RADIO_ON;
 314         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 315         ret = lbtf_setup_firmware(priv);
 316         if (ret)
 317                 goto err_prog_firmware;
 318
 319         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
 320             (priv->fwrelease > LBTF_FW_VER_MAX)) {
 321                 ret = -1;
 322                 goto err_prog_firmware;
 323         }
 324
 325         printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 326         lbtf_deb_leave(LBTF_DEB_MACOPS);
 327         return 0;
 328
 329 err_prog_firmware:
 330         priv->hw_reset_device(card);
 331         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programing fw; ret=%d", ret);
 332         return ret;
 333 }
 334
 335 static void lbtf_op_stop(struct ieee80211_hw *hw)
 336 {
 337         struct lbtf_private *priv = hw->priv;
 338         unsigned long flags;
 339         struct sk_buff *skb;
 340
 341         struct cmd_ctrl_node *cmdnode;
 342
 343         lbtf_deb_enter(LBTF_DEB_MACOPS);
 344
 345         /* Flush pending command nodes */
 346         spin_lock_irqsave(&priv->driver_lock, flags);
 347         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 348                 cmdnode->result = -ENOENT;
 349                 cmdnode->cmdwaitqwoken = 1;
 350                 wake_up_interruptible(&cmdnode->cmdwait_q);
 351         }
 352
 353         spin_unlock_irqrestore(&priv->driver_lock, flags);
 354         cancel_work_sync(&priv->cmd_work);
 355         cancel_work_sync(&priv->tx_work);
 356         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 357                 dev_kfree_skb_any(skb);
 358         priv->radioon = RADIO_OFF;
 359         lbtf_set_radio_control(priv);
 360
 361         lbtf_deb_leave(LBTF_DEB_MACOPS);
 362 }
 363
 364 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 365                         struct ieee80211_vif *vif)
 366 {
 367         struct lbtf_private *priv = hw->priv;
 368         lbtf_deb_enter(LBTF_DEB_MACOPS);
 369         if (priv->vif != NULL)
 370                 return -EOPNOTSUPP;
 371
 372         priv->vif = vif;
 373         switch (vif->type) {
 374         case NL80211_IFTYPE_MESH_POINT:
 375         case NL80211_IFTYPE_AP:
 376                 lbtf_set_mode(priv, LBTF_AP_MODE);
 377                 break;
 378         case NL80211_IFTYPE_STATION:
 379                 lbtf_set_mode(priv, LBTF_STA_MODE);
 380                 break;
 381         default:
 382                 priv->vif = NULL;
 383                 return -EOPNOTSUPP;
 384         }
 385         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 386         lbtf_deb_leave(LBTF_DEB_MACOPS);
 387         return 0;
 388 }
 389
 390 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 391                         struct ieee80211_vif *vif)
 392 {
 393         struct lbtf_private *priv = hw->priv;
 394         lbtf_deb_enter(LBTF_DEB_MACOPS);
 395
 396         if (priv->vif->type == NL80211_IFTYPE_AP ||
 397             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 398                 lbtf_beacon_ctrl(priv, 0, 0);
 399         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 400         lbtf_set_bssid(priv, 0, NULL);
 401         priv->vif = NULL;
 402         lbtf_deb_leave(LBTF_DEB_MACOPS);
 403 }
 404
 405 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 406 {
 407         struct lbtf_private *priv = hw->priv;
 408         struct ieee80211_conf *conf = &hw->conf;
 409         lbtf_deb_enter(LBTF_DEB_MACOPS);
 410
 411         if (conf->channel->center_freq != priv->cur_freq) {
 412                 priv->cur_freq = conf->channel->center_freq;
 413                 lbtf_set_channel(priv, conf->channel->hw_value);
 414         }
 415         lbtf_deb_leave(LBTF_DEB_MACOPS);
 416         return 0;
 417 }
 418
 419 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 420                                      struct netdev_hw_addr_list *mc_list)
 421 {
 422         struct lbtf_private *priv = hw->priv;
 423         int i;
 424         struct netdev_hw_addr *ha;
 425         int mc_count = netdev_hw_addr_list_count(mc_list);
 426
 427         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 428                 return mc_count;
 429
 430         priv->nr_of_multicastmacaddr = mc_count;
 431         i = 0;
 432         netdev_hw_addr_list_for_each(ha, mc_list)
 433                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 434
 435         return mc_count;
 436 }
 437
 438 #define SUPPORTED_FIF_FLAGS  (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
 439 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 440                         unsigned int changed_flags,
 441                         unsigned int *new_flags,
 442                         u64 multicast)
 443 {
 444         struct lbtf_private *priv = hw->priv;
 445         int old_mac_control = priv->mac_control;
 446
 447         lbtf_deb_enter(LBTF_DEB_MACOPS);
 448
 449         changed_flags &= SUPPORTED_FIF_FLAGS;
 450         *new_flags &= SUPPORTED_FIF_FLAGS;
 451
 452         if (!changed_flags) {
 453                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 454                 return;
 455         }
 456
 457         if (*new_flags & (FIF_PROMISC_IN_BSS))
 458                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 459         else
 460                 priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 461         if (*new_flags & (FIF_ALLMULTI) ||
 462             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 463                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 464                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 465         } else if (multicast) {
 466                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 467                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 468                 lbtf_cmd_set_mac_multicast_addr(priv);
 469         } else {
 470                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 471                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 472                 if (priv->nr_of_multicastmacaddr) {
 473                         priv->nr_of_multicastmacaddr = 0;
 474                         lbtf_cmd_set_mac_multicast_addr(priv);
 475                 }
 476         }
 477
 478
 479         if (priv->mac_control != old_mac_control)
 480                 lbtf_set_mac_control(priv);
 481
 482         lbtf_deb_leave(LBTF_DEB_MACOPS);
 483 }
 484
 485 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 486                         struct ieee80211_vif *vif,
 487                         struct ieee80211_bss_conf *bss_conf,
 488                         u32 changes)
 489 {
 490         struct lbtf_private *priv = hw->priv;
 491         struct sk_buff *beacon;
 492         lbtf_deb_enter(LBTF_DEB_MACOPS);
 493
 494         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 495                 switch (priv->vif->type) {
 496                 case NL80211_IFTYPE_AP:
 497                 case NL80211_IFTYPE_MESH_POINT:
 498                         beacon = ieee80211_beacon_get(hw, vif);
 499                         if (beacon) {
 500                                 lbtf_beacon_set(priv, beacon);
 501                                 kfree_skb(beacon);
 502                                 lbtf_beacon_ctrl(priv, 1,
 503                                                  bss_conf->beacon_int);
 504                         }
 505                         break;
 506                 default:
 507                         break;
 508                 }
 509         }
 510
 511         if (changes & BSS_CHANGED_BSSID) {
 512                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 513                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 514         }
 515
 516         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 517                 if (bss_conf->use_short_preamble)
 518                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 519                 else
 520                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 521                 lbtf_set_radio_control(priv);
 522         }
 523
 524         lbtf_deb_leave(LBTF_DEB_MACOPS);
 525 }
 526
 527 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 528                                 struct survey_info *survey)
 529 {
 530         struct lbtf_private *priv = hw->priv;
 531         struct ieee80211_conf *conf = &hw->conf;
 532
 533         if (idx != 0)
 534                 return -ENOENT;
 535
 536         survey->channel = conf->channel;
 537         survey->filled = SURVEY_INFO_NOISE_DBM;
 538         survey->noise = priv->noise;
 539
 540         return 0;
 541 }
 542
 543 static const struct ieee80211_ops lbtf_ops = {
 544         .tx                     = lbtf_op_tx,
 545         .start                  = lbtf_op_start,
 546         .stop                   = lbtf_op_stop,
 547         .add_interface          = lbtf_op_add_interface,
 548         .remove_interface       = lbtf_op_remove_interface,
 549         .config                 = lbtf_op_config,
 550         .prepare_multicast      = lbtf_op_prepare_multicast,
 551         .configure_filter       = lbtf_op_configure_filter,
 552         .bss_info_changed       = lbtf_op_bss_info_changed,
 553         .get_survey             = lbtf_op_get_survey,
 554 };
 555
 556 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 557 {
 558         struct ieee80211_rx_status stats;
 559         struct rxpd *prxpd;
 560         int need_padding;
 561         unsigned int flags;
 562         struct ieee80211_hdr *hdr;
 563
 564         lbtf_deb_enter(LBTF_DEB_RX);
 565
 566         prxpd = (struct rxpd *) skb->data;
 567
 568         memset(&stats, 0, sizeof(stats));
 569         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 570                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 571         stats.freq = priv->cur_freq;
 572         stats.band = IEEE80211_BAND_2GHZ;
 573         stats.signal = prxpd->snr;
 574         priv->noise = prxpd->nf;
 575         /* Marvell rate index has a hole at value 4 */
 576         if (prxpd->rx_rate > 4)
 577                 --prxpd->rx_rate;
 578         stats.rate_idx = prxpd->rx_rate;
 579         skb_pull(skb, sizeof(struct rxpd));
 580
 581         hdr = (struct ieee80211_hdr *)skb->data;
 582         flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
 583
 584         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 585         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 586         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 587                         (*ieee80211_get_qos_ctl(hdr) &
 588                          IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
 589
 590         if (need_padding) {
 591                 memmove(skb->data + 2, skb->data, skb->len);
 592                 skb_reserve(skb, 2);
 593         }
 594
 595         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 596
 597         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 598                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 599         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 600                      min_t(unsigned int, skb->len, 100));
 601
 602         ieee80211_rx_irqsafe(priv->hw, skb);
 603
 604         lbtf_deb_leave(LBTF_DEB_RX);
 605         return 0;
 606 }
 607 EXPORT_SYMBOL_GPL(lbtf_rx);
 608
 609 /**
 610  * lbtf_add_card: Add and initialize the card, no fw upload yet.
 611  *
 612  *  @card    A pointer to card
 613  *
 614  *  Returns: pointer to struct lbtf_priv.
 615  */
 616 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
 617 {
 618         struct ieee80211_hw *hw;
 619         struct lbtf_private *priv = NULL;
 620
 621         lbtf_deb_enter(LBTF_DEB_MAIN);
 622
 623         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 624         if (!hw)
 625                 goto done;
 626
 627         priv = hw->priv;
 628         if (lbtf_init_adapter(priv))
 629                 goto err_init_adapter;
 630
 631         priv->hw = hw;
 632         priv->card = card;
 633         priv->tx_skb = NULL;
 634
 635         hw->queues = 1;
 636         hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
 637         hw->extra_tx_headroom = sizeof(struct txpd);
 638         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 639         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 640         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 641         priv->band.bitrates = priv->rates;
 642         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 643         priv->band.channels = priv->channels;
 644         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
 645         hw->wiphy->interface_modes =
 646                 BIT(NL80211_IFTYPE_STATION) |
 647                 BIT(NL80211_IFTYPE_ADHOC);
 648         skb_queue_head_init(&priv->bc_ps_buf);
 649
 650         SET_IEEE80211_DEV(hw, dmdev);
 651
 652         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 653         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 654         if (ieee80211_register_hw(hw))
 655                 goto err_init_adapter;
 656
 657         goto done;
 658
 659 err_init_adapter:
 660         lbtf_free_adapter(priv);
 661         ieee80211_free_hw(hw);
 662         priv = NULL;
 663
 664 done:
 665         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 666         return priv;
 667 }
 668 EXPORT_SYMBOL_GPL(lbtf_add_card);
 669
 670
 671 int lbtf_remove_card(struct lbtf_private *priv)
 672 {
 673         struct ieee80211_hw *hw = priv->hw;
 674
 675         lbtf_deb_enter(LBTF_DEB_MAIN);
 676
 677         priv->surpriseremoved = 1;
 678         del_timer(&priv->command_timer);
 679         lbtf_free_adapter(priv);
 680         priv->hw = NULL;
 681         ieee80211_unregister_hw(hw);
 682         ieee80211_free_hw(hw);
 683
 684     lbtf_deb_leave(LBTF_DEB_MAIN);
 685         return 0;
 686 }
 687 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 688
 689 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 690 {
 691         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 692
 693         ieee80211_tx_info_clear_status(info);
 694         /*
 695          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 696          * default pid rc algorithm.
 697          *
 698          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 699          */
 700         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 701                 info->flags |= IEEE80211_TX_STAT_ACK;
 702         skb_pull(priv->tx_skb, sizeof(struct txpd));
 703         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 704         priv->tx_skb = NULL;
 705         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 706                 ieee80211_wake_queues(priv->hw);
 707         else
 708                 queue_work(lbtf_wq, &priv->tx_work);
 709 }
 710 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 711
 712 void lbtf_bcn_sent(struct lbtf_private *priv)
 713 {
 714         struct sk_buff *skb = NULL;
 715
 716         if (priv->vif->type != NL80211_IFTYPE_AP)
 717                 return;
 718
 719         if (skb_queue_empty(&priv->bc_ps_buf)) {
 720                 bool tx_buff_bc = 0;
 721
 722                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 723                         skb_queue_tail(&priv->bc_ps_buf, skb);
 724                         tx_buff_bc = 1;
 725                 }
 726                 if (tx_buff_bc) {
 727                         ieee80211_stop_queues(priv->hw);
 728                         queue_work(lbtf_wq, &priv->tx_work);
 729                 }
 730         }
 731
 732         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 733
 734         if (skb) {
 735                 lbtf_beacon_set(priv, skb);
 736                 kfree_skb(skb);
 737         }
 738 }
 739 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 740
 741 static int __init lbtf_init_module(void)
 742 {
 743         lbtf_deb_enter(LBTF_DEB_MAIN);
 744         lbtf_wq = create_workqueue("libertastf");
 745         if (lbtf_wq == NULL) {
 746                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 747                 return -ENOMEM;
 748         }
 749         lbtf_deb_leave(LBTF_DEB_MAIN);
 750         return 0;
 751 }
 752
 753 static void __exit lbtf_exit_module(void)
 754 {
 755         lbtf_deb_enter(LBTF_DEB_MAIN);
 756         destroy_workqueue(lbtf_wq);
 757         lbtf_deb_leave(LBTF_DEB_MAIN);
 758 }
 759
 760 module_init(lbtf_init_module);
 761 module_exit(lbtf_exit_module);
 762
 763 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 764 MODULE_AUTHOR("Cozybit Inc.");
 765 MODULE_LICENSE("GPL");