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  *  lbtf_setup_firmware: initialize firmware.
 130  *
 131  *  @priv    A pointer to struct lbtf_private structure
 132  *
 133  *  Returns: 0 on success.
 134  */
 135 static int lbtf_setup_firmware(struct lbtf_private *priv)
 136 {
 137         int ret = -1;
 138
 139         lbtf_deb_enter(LBTF_DEB_FW);
 140         /*
 141          * Read priv address from HW
 142          */
 143         eth_broadcast_addr(priv->current_addr);
 144         ret = lbtf_update_hw_spec(priv);
 145         if (ret) {
 146                 ret = -1;
 147                 goto done;
 148         }
 149
 150         lbtf_set_mac_control(priv);
 151         lbtf_set_radio_control(priv);
 152
 153         ret = 0;
 154 done:
 155         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
 156         return ret;
 157 }
 158
 159 /**
 160  *  This function handles the timeout of command sending.
 161  *  It will re-send the same command again.
 162  */
 163 static void command_timer_fn(struct timer_list *t)
 164 {
 165         struct lbtf_private *priv = from_timer(priv, t, command_timer);
 166         unsigned long flags;
 167         lbtf_deb_enter(LBTF_DEB_CMD);
 168
 169         spin_lock_irqsave(&priv->driver_lock, flags);
 170
 171         if (!priv->cur_cmd) {
 172                 printk(KERN_DEBUG "libertastf: command timer expired; "
 173                                   "no pending command\n");
 174                 goto out;
 175         }
 176
 177         printk(KERN_DEBUG "libertas: command %x timed out\n",
 178                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 179
 180         priv->cmd_timed_out = 1;
 181         queue_work(lbtf_wq, &priv->cmd_work);
 182 out:
 183         spin_unlock_irqrestore(&priv->driver_lock, flags);
 184         lbtf_deb_leave(LBTF_DEB_CMD);
 185 }
 186
 187 static int lbtf_init_adapter(struct lbtf_private *priv)
 188 {
 189         lbtf_deb_enter(LBTF_DEB_MAIN);
 190         eth_broadcast_addr(priv->current_addr);
 191         mutex_init(&priv->lock);
 192
 193         priv->vif = NULL;
 194         timer_setup(&priv->command_timer, command_timer_fn, 0);
 195
 196         INIT_LIST_HEAD(&priv->cmdfreeq);
 197         INIT_LIST_HEAD(&priv->cmdpendingq);
 198
 199         spin_lock_init(&priv->driver_lock);
 200
 201         /* Allocate the command buffers */
 202         if (lbtf_allocate_cmd_buffer(priv))
 203                 return -1;
 204
 205         lbtf_deb_leave(LBTF_DEB_MAIN);
 206         return 0;
 207 }
 208
 209 static void lbtf_free_adapter(struct lbtf_private *priv)
 210 {
 211         lbtf_deb_enter(LBTF_DEB_MAIN);
 212         lbtf_free_cmd_buffer(priv);
 213         del_timer(&priv->command_timer);
 214         lbtf_deb_leave(LBTF_DEB_MAIN);
 215 }
 216
 217 static void lbtf_op_tx(struct ieee80211_hw *hw,
 218                        struct ieee80211_tx_control *control,
 219                        struct sk_buff *skb)
 220 {
 221         struct lbtf_private *priv = hw->priv;
 222
 223         priv->skb_to_tx = skb;
 224         queue_work(lbtf_wq, &priv->tx_work);
 225         /*
 226          * queue will be restarted when we receive transmission feedback if
 227          * there are no buffered multicast frames to send
 228          */
 229         ieee80211_stop_queues(priv->hw);
 230 }
 231
 232 static void lbtf_tx_work(struct work_struct *work)
 233 {
 234         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 235                                          tx_work);
 236         unsigned int len;
 237         struct ieee80211_tx_info *info;
 238         struct txpd *txpd;
 239         struct sk_buff *skb = NULL;
 240         int err;
 241
 242         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 243
 244         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 245             (!skb_queue_empty(&priv->bc_ps_buf)))
 246                 skb = skb_dequeue(&priv->bc_ps_buf);
 247         else if (priv->skb_to_tx) {
 248                 skb = priv->skb_to_tx;
 249                 priv->skb_to_tx = NULL;
 250         } else {
 251                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 252                 return;
 253         }
 254
 255         len = skb->len;
 256         info  = IEEE80211_SKB_CB(skb);
 257         txpd = skb_push(skb, sizeof(struct txpd));
 258
 259         if (priv->surpriseremoved) {
 260                 dev_kfree_skb_any(skb);
 261                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 262                 return;
 263         }
 264
 265         memset(txpd, 0, sizeof(struct txpd));
 266         /* Activate per-packet rate selection */
 267         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 268                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 269
 270         /* copy destination address from 802.11 header */
 271         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 272                 ETH_ALEN);
 273         txpd->tx_packet_length = cpu_to_le16(len);
 274         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 275         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 276         BUG_ON(priv->tx_skb);
 277         spin_lock_irq(&priv->driver_lock);
 278         priv->tx_skb = skb;
 279         err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 280         spin_unlock_irq(&priv->driver_lock);
 281         if (err) {
 282                 dev_kfree_skb_any(skb);
 283                 priv->tx_skb = NULL;
 284                 pr_err("TX error: %d", err);
 285         }
 286         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 287 }
 288
 289 static int lbtf_op_start(struct ieee80211_hw *hw)
 290 {
 291         struct lbtf_private *priv = hw->priv;
 292         int ret = -1;
 293
 294         lbtf_deb_enter(LBTF_DEB_MACOPS);
 295
 296         /* poke the firmware */
 297         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 298         priv->radioon = RADIO_ON;
 299         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 300         ret = lbtf_setup_firmware(priv);
 301         if (ret)
 302                 goto err_setup_firmware;
 303
 304         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
 305             (priv->fwrelease > LBTF_FW_VER_MAX)) {
 306                 ret = -1;
 307                 goto err_setup_firmware;
 308         }
 309
 310         lbtf_deb_leave(LBTF_DEB_MACOPS);
 311         return 0;
 312
 313 err_setup_firmware:
 314         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "fw setup error; ret=%d", ret);
 315         return ret;
 316 }
 317
 318 static void lbtf_op_stop(struct ieee80211_hw *hw)
 319 {
 320         struct lbtf_private *priv = hw->priv;
 321         unsigned long flags;
 322         struct sk_buff *skb;
 323
 324         struct cmd_ctrl_node *cmdnode;
 325
 326         lbtf_deb_enter(LBTF_DEB_MACOPS);
 327
 328         /* Flush pending command nodes */
 329         spin_lock_irqsave(&priv->driver_lock, flags);
 330         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 331                 cmdnode->result = -ENOENT;
 332                 cmdnode->cmdwaitqwoken = 1;
 333                 wake_up_interruptible(&cmdnode->cmdwait_q);
 334         }
 335
 336         spin_unlock_irqrestore(&priv->driver_lock, flags);
 337         cancel_work_sync(&priv->cmd_work);
 338         cancel_work_sync(&priv->tx_work);
 339         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 340                 dev_kfree_skb_any(skb);
 341         priv->radioon = RADIO_OFF;
 342         lbtf_set_radio_control(priv);
 343
 344         lbtf_deb_leave(LBTF_DEB_MACOPS);
 345 }
 346
 347 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 348                         struct ieee80211_vif *vif)
 349 {
 350         struct lbtf_private *priv = hw->priv;
 351         lbtf_deb_enter(LBTF_DEB_MACOPS);
 352         if (priv->vif != NULL)
 353                 return -EOPNOTSUPP;
 354
 355         priv->vif = vif;
 356         switch (vif->type) {
 357         case NL80211_IFTYPE_MESH_POINT:
 358         case NL80211_IFTYPE_AP:
 359                 lbtf_set_mode(priv, LBTF_AP_MODE);
 360                 break;
 361         case NL80211_IFTYPE_STATION:
 362                 lbtf_set_mode(priv, LBTF_STA_MODE);
 363                 break;
 364         default:
 365                 priv->vif = NULL;
 366                 return -EOPNOTSUPP;
 367         }
 368         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 369         lbtf_deb_leave(LBTF_DEB_MACOPS);
 370         return 0;
 371 }
 372
 373 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 374                         struct ieee80211_vif *vif)
 375 {
 376         struct lbtf_private *priv = hw->priv;
 377         lbtf_deb_enter(LBTF_DEB_MACOPS);
 378
 379         if (priv->vif->type == NL80211_IFTYPE_AP ||
 380             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 381                 lbtf_beacon_ctrl(priv, 0, 0);
 382         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 383         lbtf_set_bssid(priv, 0, NULL);
 384         priv->vif = NULL;
 385         lbtf_deb_leave(LBTF_DEB_MACOPS);
 386 }
 387
 388 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 389 {
 390         struct lbtf_private *priv = hw->priv;
 391         struct ieee80211_conf *conf = &hw->conf;
 392         lbtf_deb_enter(LBTF_DEB_MACOPS);
 393
 394         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 395                 priv->cur_freq = conf->chandef.chan->center_freq;
 396                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 397         }
 398         lbtf_deb_leave(LBTF_DEB_MACOPS);
 399         return 0;
 400 }
 401
 402 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 403                                      struct netdev_hw_addr_list *mc_list)
 404 {
 405         struct lbtf_private *priv = hw->priv;
 406         int i;
 407         struct netdev_hw_addr *ha;
 408         int mc_count = netdev_hw_addr_list_count(mc_list);
 409
 410         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 411                 return mc_count;
 412
 413         priv->nr_of_multicastmacaddr = mc_count;
 414         i = 0;
 415         netdev_hw_addr_list_for_each(ha, mc_list)
 416                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 417
 418         return mc_count;
 419 }
 420
 421 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 422 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 423                         unsigned int changed_flags,
 424                         unsigned int *new_flags,
 425                         u64 multicast)
 426 {
 427         struct lbtf_private *priv = hw->priv;
 428         int old_mac_control = priv->mac_control;
 429
 430         lbtf_deb_enter(LBTF_DEB_MACOPS);
 431
 432         changed_flags &= SUPPORTED_FIF_FLAGS;
 433         *new_flags &= SUPPORTED_FIF_FLAGS;
 434
 435         if (!changed_flags) {
 436                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 437                 return;
 438         }
 439
 440         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 441         if (*new_flags & (FIF_ALLMULTI) ||
 442             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 443                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 444                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 445         } else if (multicast) {
 446                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 447                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 448                 lbtf_cmd_set_mac_multicast_addr(priv);
 449         } else {
 450                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 451                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 452                 if (priv->nr_of_multicastmacaddr) {
 453                         priv->nr_of_multicastmacaddr = 0;
 454                         lbtf_cmd_set_mac_multicast_addr(priv);
 455                 }
 456         }
 457
 458
 459         if (priv->mac_control != old_mac_control)
 460                 lbtf_set_mac_control(priv);
 461
 462         lbtf_deb_leave(LBTF_DEB_MACOPS);
 463 }
 464
 465 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 466                         struct ieee80211_vif *vif,
 467                         struct ieee80211_bss_conf *bss_conf,
 468                         u32 changes)
 469 {
 470         struct lbtf_private *priv = hw->priv;
 471         struct sk_buff *beacon;
 472         lbtf_deb_enter(LBTF_DEB_MACOPS);
 473
 474         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 475                 switch (priv->vif->type) {
 476                 case NL80211_IFTYPE_AP:
 477                 case NL80211_IFTYPE_MESH_POINT:
 478                         beacon = ieee80211_beacon_get(hw, vif);
 479                         if (beacon) {
 480                                 lbtf_beacon_set(priv, beacon);
 481                                 kfree_skb(beacon);
 482                                 lbtf_beacon_ctrl(priv, 1,
 483                                                  bss_conf->beacon_int);
 484                         }
 485                         break;
 486                 default:
 487                         break;
 488                 }
 489         }
 490
 491         if (changes & BSS_CHANGED_BSSID) {
 492                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 493                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 494         }
 495
 496         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 497                 if (bss_conf->use_short_preamble)
 498                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 499                 else
 500                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 501                 lbtf_set_radio_control(priv);
 502         }
 503
 504         lbtf_deb_leave(LBTF_DEB_MACOPS);
 505 }
 506
 507 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 508                                 struct survey_info *survey)
 509 {
 510         struct lbtf_private *priv = hw->priv;
 511         struct ieee80211_conf *conf = &hw->conf;
 512
 513         if (idx != 0)
 514                 return -ENOENT;
 515
 516         survey->channel = conf->chandef.chan;
 517         survey->filled = SURVEY_INFO_NOISE_DBM;
 518         survey->noise = priv->noise;
 519
 520         return 0;
 521 }
 522
 523 static const struct ieee80211_ops lbtf_ops = {
 524         .tx                     = lbtf_op_tx,
 525         .start                  = lbtf_op_start,
 526         .stop                   = lbtf_op_stop,
 527         .add_interface          = lbtf_op_add_interface,
 528         .remove_interface       = lbtf_op_remove_interface,
 529         .config                 = lbtf_op_config,
 530         .prepare_multicast      = lbtf_op_prepare_multicast,
 531         .configure_filter       = lbtf_op_configure_filter,
 532         .bss_info_changed       = lbtf_op_bss_info_changed,
 533         .get_survey             = lbtf_op_get_survey,
 534 };
 535
 536 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 537 {
 538         struct ieee80211_rx_status stats;
 539         struct rxpd *prxpd;
 540         int need_padding;
 541         struct ieee80211_hdr *hdr;
 542
 543         lbtf_deb_enter(LBTF_DEB_RX);
 544
 545         if (priv->radioon != RADIO_ON) {
 546                 lbtf_deb_rx("rx before we turned on the radio");
 547                 goto done;
 548         }
 549
 550         prxpd = (struct rxpd *) skb->data;
 551
 552         memset(&stats, 0, sizeof(stats));
 553         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 554                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 555         stats.freq = priv->cur_freq;
 556         stats.band = NL80211_BAND_2GHZ;
 557         stats.signal = prxpd->snr - prxpd->nf;
 558         priv->noise = prxpd->nf;
 559         /* Marvell rate index has a hole at value 4 */
 560         if (prxpd->rx_rate > 4)
 561                 --prxpd->rx_rate;
 562         stats.rate_idx = prxpd->rx_rate;
 563         skb_pull(skb, sizeof(struct rxpd));
 564
 565         hdr = (struct ieee80211_hdr *)skb->data;
 566
 567         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 568         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 569         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 570                         (*ieee80211_get_qos_ctl(hdr) &
 571                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 572
 573         if (need_padding) {
 574                 memmove(skb->data + 2, skb->data, skb->len);
 575                 skb_reserve(skb, 2);
 576         }
 577
 578         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 579
 580         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 581                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 582         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 583                      min_t(unsigned int, skb->len, 100));
 584
 585         ieee80211_rx_irqsafe(priv->hw, skb);
 586
 587 done:
 588         lbtf_deb_leave(LBTF_DEB_RX);
 589         return 0;
 590 }
 591 EXPORT_SYMBOL_GPL(lbtf_rx);
 592
 593 /**
 594  * lbtf_add_card: Add and initialize the card.
 595  *
 596  *  @card    A pointer to card
 597  *
 598  *  Returns: pointer to struct lbtf_priv.
 599  */
 600 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
 601                                    const struct lbtf_ops *ops)
 602 {
 603         struct ieee80211_hw *hw;
 604         struct lbtf_private *priv = NULL;
 605
 606         lbtf_deb_enter(LBTF_DEB_MAIN);
 607
 608         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 609         if (!hw)
 610                 goto done;
 611
 612         priv = hw->priv;
 613         if (lbtf_init_adapter(priv))
 614                 goto err_init_adapter;
 615
 616         priv->hw = hw;
 617         priv->card = card;
 618         priv->ops = ops;
 619         priv->tx_skb = NULL;
 620         priv->radioon = RADIO_OFF;
 621
 622         hw->queues = 1;
 623         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 624         ieee80211_hw_set(hw, SIGNAL_DBM);
 625         hw->extra_tx_headroom = sizeof(struct txpd);
 626         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 627         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 628         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 629         priv->band.bitrates = priv->rates;
 630         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 631         priv->band.channels = priv->channels;
 632         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 633         hw->wiphy->interface_modes =
 634                 BIT(NL80211_IFTYPE_STATION) |
 635                 BIT(NL80211_IFTYPE_ADHOC);
 636         skb_queue_head_init(&priv->bc_ps_buf);
 637
 638         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 639
 640         SET_IEEE80211_DEV(hw, dmdev);
 641
 642         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 643         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 644
 645         if (priv->ops->hw_prog_firmware(priv)) {
 646                 lbtf_deb_usbd(dmdev, "Error programming the firmware\n");
 647                 priv->ops->hw_reset_device(priv);
 648                 goto err_init_adapter;
 649         }
 650
 651         /* The firmware seems to start with the radio enabled. Turn it
 652          * off before an actual mac80211 start callback is invoked.
 653          */
 654         lbtf_set_radio_control(priv);
 655
 656         if (ieee80211_register_hw(hw))
 657                 goto err_init_adapter;
 658
 659         dev_info(dmdev, "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 660         goto done;
 661
 662 err_init_adapter:
 663         lbtf_free_adapter(priv);
 664         ieee80211_free_hw(hw);
 665         priv = NULL;
 666
 667 done:
 668         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 669         return priv;
 670 }
 671 EXPORT_SYMBOL_GPL(lbtf_add_card);
 672
 673
 674 int lbtf_remove_card(struct lbtf_private *priv)
 675 {
 676         struct ieee80211_hw *hw = priv->hw;
 677
 678         lbtf_deb_enter(LBTF_DEB_MAIN);
 679
 680         priv->surpriseremoved = 1;
 681         del_timer(&priv->command_timer);
 682         lbtf_free_adapter(priv);
 683         priv->hw = NULL;
 684         ieee80211_unregister_hw(hw);
 685         ieee80211_free_hw(hw);
 686
 687         lbtf_deb_leave(LBTF_DEB_MAIN);
 688         return 0;
 689 }
 690 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 691
 692 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 693 {
 694         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 695
 696         ieee80211_tx_info_clear_status(info);
 697         /*
 698          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 699          * default pid rc algorithm.
 700          *
 701          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 702          */
 703         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 704                 info->flags |= IEEE80211_TX_STAT_ACK;
 705         skb_pull(priv->tx_skb, sizeof(struct txpd));
 706         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 707         priv->tx_skb = NULL;
 708         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 709                 ieee80211_wake_queues(priv->hw);
 710         else
 711                 queue_work(lbtf_wq, &priv->tx_work);
 712 }
 713 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 714
 715 void lbtf_bcn_sent(struct lbtf_private *priv)
 716 {
 717         struct sk_buff *skb = NULL;
 718
 719         if (priv->vif->type != NL80211_IFTYPE_AP)
 720                 return;
 721
 722         if (skb_queue_empty(&priv->bc_ps_buf)) {
 723                 bool tx_buff_bc = false;
 724
 725                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 726                         skb_queue_tail(&priv->bc_ps_buf, skb);
 727                         tx_buff_bc = true;
 728                 }
 729                 if (tx_buff_bc) {
 730                         ieee80211_stop_queues(priv->hw);
 731                         queue_work(lbtf_wq, &priv->tx_work);
 732                 }
 733         }
 734
 735         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 736
 737         if (skb) {
 738                 lbtf_beacon_set(priv, skb);
 739                 kfree_skb(skb);
 740         }
 741 }
 742 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 743
 744 static int __init lbtf_init_module(void)
 745 {
 746         lbtf_deb_enter(LBTF_DEB_MAIN);
 747         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 748         if (lbtf_wq == NULL) {
 749                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 750                 return -ENOMEM;
 751         }
 752         lbtf_deb_leave(LBTF_DEB_MAIN);
 753         return 0;
 754 }
 755
 756 static void __exit lbtf_exit_module(void)
 757 {
 758         lbtf_deb_enter(LBTF_DEB_MAIN);
 759         destroy_workqueue(lbtf_wq);
 760         lbtf_deb_leave(LBTF_DEB_MAIN);
 761 }
 762
 763 module_init(lbtf_init_module);
 764 module_exit(lbtf_exit_module);
 765
 766 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 767 MODULE_AUTHOR("Cozybit Inc.");
 768 MODULE_LICENSE("GPL");