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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / net / wireless / libertas_tf / main.c
blob019431d2f8a900ebe1f981aff8fd40b309e419b1
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 #include "libertas_tf.h"
11 #include "linux/etherdevice.h"
12
13 #define DRIVER_RELEASE_VERSION "004.p0"
14 /* thinfirm version: 5.132.X.pX */
15 #define LBTF_FW_VER_MIN 0x05840300
16 #define LBTF_FW_VER_MAX 0x0584ffff
17 #define QOS_CONTROL_LEN 2
18
19 static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION;
20 struct workqueue_struct *lbtf_wq;
21
22 static const struct ieee80211_channel lbtf_channels[] = {
23 { .center_freq = 2412, .hw_value = 1 },
24 { .center_freq = 2417, .hw_value = 2 },
25 { .center_freq = 2422, .hw_value = 3 },
26 { .center_freq = 2427, .hw_value = 4 },
27 { .center_freq = 2432, .hw_value = 5 },
28 { .center_freq = 2437, .hw_value = 6 },
29 { .center_freq = 2442, .hw_value = 7 },
30 { .center_freq = 2447, .hw_value = 8 },
31 { .center_freq = 2452, .hw_value = 9 },
32 { .center_freq = 2457, .hw_value = 10 },
33 { .center_freq = 2462, .hw_value = 11 },
34 { .center_freq = 2467, .hw_value = 12 },
35 { .center_freq = 2472, .hw_value = 13 },
36 { .center_freq = 2484, .hw_value = 14 },
37 };
38
39 /* This table contains the hardware specific values for the modulation rates. */
40 static const struct ieee80211_rate lbtf_rates[] = {
41 { .bitrate = 10,
42 .hw_value = 0, },
43 { .bitrate = 20,
44 .hw_value = 1,
45 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
46 { .bitrate = 55,
47 .hw_value = 2,
48 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
49 { .bitrate = 110,
50 .hw_value = 3,
51 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
52 { .bitrate = 60,
53 .hw_value = 5,
54 .flags = 0 },
55 { .bitrate = 90,
56 .hw_value = 6,
57 .flags = 0 },
58 { .bitrate = 120,
59 .hw_value = 7,
60 .flags = 0 },
61 { .bitrate = 180,
62 .hw_value = 8,
63 .flags = 0 },
64 { .bitrate = 240,
65 .hw_value = 9,
66 .flags = 0 },
67 { .bitrate = 360,
68 .hw_value = 10,
69 .flags = 0 },
70 { .bitrate = 480,
71 .hw_value = 11,
72 .flags = 0 },
73 { .bitrate = 540,
74 .hw_value = 12,
75 .flags = 0 },
76 };
77
78 static void lbtf_cmd_work(struct work_struct *work)
79 {
80 struct lbtf_private *priv = container_of(work, struct lbtf_private,
81 cmd_work);
82 spin_lock_irq(&priv->driver_lock);
83 /* command response? */
84 if (priv->cmd_response_rxed) {
85 priv->cmd_response_rxed = 0;
86 spin_unlock_irq(&priv->driver_lock);
87 lbtf_process_rx_command(priv);
88 spin_lock_irq(&priv->driver_lock);
89 }
90
91 if (priv->cmd_timed_out && priv->cur_cmd) {
92 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
93
94 if (++priv->nr_retries > 10) {
95 lbtf_complete_command(priv, cmdnode,
96 -ETIMEDOUT);
97 priv->nr_retries = 0;
98 } else {
99 priv->cur_cmd = NULL;
100
101 /* Stick it back at the _top_ of the pending
102 * queue for immediate resubmission */
103 list_add(&cmdnode->list, &priv->cmdpendingq);
104 }
105 }
106 priv->cmd_timed_out = 0;
107 spin_unlock_irq(&priv->driver_lock);
108
109 if (!priv->fw_ready)
110 return;
111 /* Execute the next command */
112 if (!priv->cur_cmd)
113 lbtf_execute_next_command(priv);
114 }
115
116 /**
117 * lbtf_setup_firmware: initialize firmware.
118 *
119 * @priv A pointer to struct lbtf_private structure
120 *
121 * Returns: 0 on success.
122 */
123 static int lbtf_setup_firmware(struct lbtf_private *priv)
124 {
125 int ret = -1;
126
127 /*
128 * Read priv address from HW
129 */
130 memset(priv->current_addr, 0xff, ETH_ALEN);
131 ret = lbtf_update_hw_spec(priv);
132 if (ret) {
133 ret = -1;
134 goto done;
135 }
136
137 lbtf_set_mac_control(priv);
138 lbtf_set_radio_control(priv);
139
140 ret = 0;
141 done:
142 return ret;
143 }
144
145 /**
146 * This function handles the timeout of command sending.
147 * It will re-send the same command again.
148 */
149 static void command_timer_fn(unsigned long data)
150 {
151 struct lbtf_private *priv = (struct lbtf_private *)data;
152 unsigned long flags;
153
154 spin_lock_irqsave(&priv->driver_lock, flags);
155
156 if (!priv->cur_cmd) {
157 printk(KERN_DEBUG "libertastf: command timer expired; "
158 "no pending command\n");
159 goto out;
160 }
161
162 printk(KERN_DEBUG "libertas: command %x timed out\n",
163 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
164
165 priv->cmd_timed_out = 1;
166 queue_work(lbtf_wq, &priv->cmd_work);
167 out:
168 spin_unlock_irqrestore(&priv->driver_lock, flags);
169 }
170
171 static int lbtf_init_adapter(struct lbtf_private *priv)
172 {
173 memset(priv->current_addr, 0xff, ETH_ALEN);
174 mutex_init(&priv->lock);
175
176 priv->vif = NULL;
177 setup_timer(&priv->command_timer, command_timer_fn,
178 (unsigned long)priv);
179
180 INIT_LIST_HEAD(&priv->cmdfreeq);
181 INIT_LIST_HEAD(&priv->cmdpendingq);
182
183 spin_lock_init(&priv->driver_lock);
184
185 /* Allocate the command buffers */
186 if (lbtf_allocate_cmd_buffer(priv))
187 return -1;
188
189 return 0;
190 }
191
192 static void lbtf_free_adapter(struct lbtf_private *priv)
193 {
194 lbtf_free_cmd_buffer(priv);
195 del_timer(&priv->command_timer);
196 }
197
198 static int lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
199 {
200 struct lbtf_private *priv = hw->priv;
201
202 priv->skb_to_tx = skb;
203 queue_work(lbtf_wq, &priv->tx_work);
204 /*
205 * queue will be restarted when we receive transmission feedback if
206 * there are no buffered multicast frames to send
207 */
208 ieee80211_stop_queues(priv->hw);
209 return NETDEV_TX_OK;
210 }
211
212 static void lbtf_tx_work(struct work_struct *work)
213 {
214 struct lbtf_private *priv = container_of(work, struct lbtf_private,
215 tx_work);
216 unsigned int len;
217 struct ieee80211_tx_info *info;
218 struct txpd *txpd;
219 struct sk_buff *skb = NULL;
220 int err;
221
222 if ((priv->vif->type == NL80211_IFTYPE_AP) &&
223 (!skb_queue_empty(&priv->bc_ps_buf)))
224 skb = skb_dequeue(&priv->bc_ps_buf);
225 else if (priv->skb_to_tx) {
226 skb = priv->skb_to_tx;
227 priv->skb_to_tx = NULL;
228 } else
229 return;
230
231 len = skb->len;
232 info = IEEE80211_SKB_CB(skb);
233 txpd = (struct txpd *) skb_push(skb, sizeof(struct txpd));
234
235 if (priv->surpriseremoved) {
236 dev_kfree_skb_any(skb);
237 return;
238 }
239
240 memset(txpd, 0, sizeof(struct txpd));
241 /* Activate per-packet rate selection */
242 txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
243 ieee80211_get_tx_rate(priv->hw, info)->hw_value);
244
245 /* copy destination address from 802.11 header */
246 memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
247 ETH_ALEN);
248 txpd->tx_packet_length = cpu_to_le16(len);
249 txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
250 BUG_ON(priv->tx_skb);
251 spin_lock_irq(&priv->driver_lock);
252 priv->tx_skb = skb;
253 err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
254 spin_unlock_irq(&priv->driver_lock);
255 if (err) {
256 dev_kfree_skb_any(skb);
257 priv->tx_skb = NULL;
258 }
259 }
260
261 static int lbtf_op_start(struct ieee80211_hw *hw)
262 {
263 struct lbtf_private *priv = hw->priv;
264 void *card = priv->card;
265 int ret = -1;
266
267 if (!priv->fw_ready)
268 /* Upload firmware */
269 if (priv->hw_prog_firmware(card))
270 goto err_prog_firmware;
271
272 /* poke the firmware */
273 priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
274 priv->radioon = RADIO_ON;
275 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
276 ret = lbtf_setup_firmware(priv);
277 if (ret)
278 goto err_prog_firmware;
279
280 if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
281 (priv->fwrelease > LBTF_FW_VER_MAX)) {
282 ret = -1;
283 goto err_prog_firmware;
284 }
285
286 printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
287 return 0;
288
289 err_prog_firmware:
290 priv->hw_reset_device(card);
291 return ret;
292 }
293
294 static void lbtf_op_stop(struct ieee80211_hw *hw)
295 {
296 struct lbtf_private *priv = hw->priv;
297 unsigned long flags;
298 struct sk_buff *skb;
299
300 struct cmd_ctrl_node *cmdnode;
301 /* Flush pending command nodes */
302 spin_lock_irqsave(&priv->driver_lock, flags);
303 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
304 cmdnode->result = -ENOENT;
305 cmdnode->cmdwaitqwoken = 1;
306 wake_up_interruptible(&cmdnode->cmdwait_q);
307 }
308
309 spin_unlock_irqrestore(&priv->driver_lock, flags);
310 cancel_work_sync(&priv->cmd_work);
311 cancel_work_sync(&priv->tx_work);
312 while ((skb = skb_dequeue(&priv->bc_ps_buf)))
313 dev_kfree_skb_any(skb);
314 priv->radioon = RADIO_OFF;
315 lbtf_set_radio_control(priv);
316
317 return;
318 }
319
320 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
321 struct ieee80211_if_init_conf *conf)
322 {
323 struct lbtf_private *priv = hw->priv;
324 if (priv->vif != NULL)
325 return -EOPNOTSUPP;
326
327 priv->vif = conf->vif;
328 switch (conf->type) {
329 case NL80211_IFTYPE_MESH_POINT:
330 case NL80211_IFTYPE_AP:
331 lbtf_set_mode(priv, LBTF_AP_MODE);
332 break;
333 case NL80211_IFTYPE_STATION:
334 lbtf_set_mode(priv, LBTF_STA_MODE);
335 break;
336 default:
337 priv->vif = NULL;
338 return -EOPNOTSUPP;
339 }
340 lbtf_set_mac_address(priv, (u8 *) conf->mac_addr);
341 return 0;
342 }
343
344 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
345 struct ieee80211_if_init_conf *conf)
346 {
347 struct lbtf_private *priv = hw->priv;
348
349 if (priv->vif->type == NL80211_IFTYPE_AP ||
350 priv->vif->type == NL80211_IFTYPE_MESH_POINT)
351 lbtf_beacon_ctrl(priv, 0, 0);
352 lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
353 lbtf_set_bssid(priv, 0, NULL);
354 priv->vif = NULL;
355 }
356
357 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
358 {
359 struct lbtf_private *priv = hw->priv;
360 struct ieee80211_conf *conf = &hw->conf;
361
362 if (conf->channel->center_freq != priv->cur_freq) {
363 priv->cur_freq = conf->channel->center_freq;
364 lbtf_set_channel(priv, conf->channel->hw_value);
365 }
366 return 0;
367 }
368
369 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
370 int mc_count, struct dev_addr_list *mclist)
371 {
372 struct lbtf_private *priv = hw->priv;
373 int i;
374
375 if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
376 return mc_count;
377
378 priv->nr_of_multicastmacaddr = mc_count;
379 for (i = 0; i < mc_count; i++) {
380 if (!mclist)
381 break;
382 memcpy(&priv->multicastlist[i], mclist->da_addr,
383 ETH_ALEN);
384 mclist = mclist->next;
385 }
386
387 return mc_count;
388 }
389
390 #define SUPPORTED_FIF_FLAGS (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
391 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
392 unsigned int changed_flags,
393 unsigned int *new_flags,
394 u64 multicast)
395 {
396 struct lbtf_private *priv = hw->priv;
397 int old_mac_control = priv->mac_control;
398 changed_flags &= SUPPORTED_FIF_FLAGS;
399 *new_flags &= SUPPORTED_FIF_FLAGS;
400
401 if (!changed_flags)
402 return;
403
404 if (*new_flags & (FIF_PROMISC_IN_BSS))
405 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
406 else
407 priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
408 if (*new_flags & (FIF_ALLMULTI) ||
409 multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
410 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
411 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
412 } else if (multicast) {
413 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
414 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
415 lbtf_cmd_set_mac_multicast_addr(priv);
416 } else {
417 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
418 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
419 if (priv->nr_of_multicastmacaddr) {
420 priv->nr_of_multicastmacaddr = 0;
421 lbtf_cmd_set_mac_multicast_addr(priv);
422 }
423 }
424
425
426 if (priv->mac_control != old_mac_control)
427 lbtf_set_mac_control(priv);
428 }
429
430 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
431 struct ieee80211_vif *vif,
432 struct ieee80211_bss_conf *bss_conf,
433 u32 changes)
434 {
435 struct lbtf_private *priv = hw->priv;
436 struct sk_buff *beacon;
437
438 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
439 switch (priv->vif->type) {
440 case NL80211_IFTYPE_AP:
441 case NL80211_IFTYPE_MESH_POINT:
442 beacon = ieee80211_beacon_get(hw, vif);
443 if (beacon) {
444 lbtf_beacon_set(priv, beacon);
445 kfree_skb(beacon);
446 lbtf_beacon_ctrl(priv, 1,
447 bss_conf->beacon_int);
448 }
449 break;
450 default:
451 break;
452 }
453 }
454
455 if (changes & BSS_CHANGED_BSSID) {
456 bool activate = !is_zero_ether_addr(bss_conf->bssid);
457 lbtf_set_bssid(priv, activate, bss_conf->bssid);
458 }
459
460 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
461 if (bss_conf->use_short_preamble)
462 priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
463 else
464 priv->preamble = CMD_TYPE_LONG_PREAMBLE;
465 lbtf_set_radio_control(priv);
466 }
467 }
468
469 static const struct ieee80211_ops lbtf_ops = {
470 .tx = lbtf_op_tx,
471 .start = lbtf_op_start,
472 .stop = lbtf_op_stop,
473 .add_interface = lbtf_op_add_interface,
474 .remove_interface = lbtf_op_remove_interface,
475 .config = lbtf_op_config,
476 .prepare_multicast = lbtf_op_prepare_multicast,
477 .configure_filter = lbtf_op_configure_filter,
478 .bss_info_changed = lbtf_op_bss_info_changed,
479 };
480
481 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
482 {
483 struct ieee80211_rx_status stats;
484 struct rxpd *prxpd;
485 int need_padding;
486 unsigned int flags;
487 struct ieee80211_hdr *hdr;
488
489 prxpd = (struct rxpd *) skb->data;
490
491 stats.flag = 0;
492 if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
493 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
494 stats.freq = priv->cur_freq;
495 stats.band = IEEE80211_BAND_2GHZ;
496 stats.signal = prxpd->snr;
497 stats.noise = prxpd->nf;
498 stats.qual = prxpd->snr - prxpd->nf;
499 /* Marvell rate index has a hole at value 4 */
500 if (prxpd->rx_rate > 4)
501 --prxpd->rx_rate;
502 stats.rate_idx = prxpd->rx_rate;
503 skb_pull(skb, sizeof(struct rxpd));
504
505 hdr = (struct ieee80211_hdr *)skb->data;
506 flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
507
508 need_padding = ieee80211_is_data_qos(hdr->frame_control);
509 need_padding ^= ieee80211_has_a4(hdr->frame_control);
510 need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
511 (*ieee80211_get_qos_ctl(hdr) &
512 IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
513
514 if (need_padding) {
515 memmove(skb->data + 2, skb->data, skb->len);
516 skb_reserve(skb, 2);
517 }
518
519 memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
520 ieee80211_rx_irqsafe(priv->hw, skb);
521 return 0;
522 }
523 EXPORT_SYMBOL_GPL(lbtf_rx);
524
525 /**
526 * lbtf_add_card: Add and initialize the card, no fw upload yet.
527 *
528 * @card A pointer to card
529 *
530 * Returns: pointer to struct lbtf_priv.
531 */
532 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
533 {
534 struct ieee80211_hw *hw;
535 struct lbtf_private *priv = NULL;
536
537 hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
538 if (!hw)
539 goto done;
540
541 priv = hw->priv;
542 if (lbtf_init_adapter(priv))
543 goto err_init_adapter;
544
545 priv->hw = hw;
546 priv->card = card;
547 priv->tx_skb = NULL;
548
549 hw->queues = 1;
550 hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
551 hw->extra_tx_headroom = sizeof(struct txpd);
552 memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
553 memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
554 priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
555 priv->band.bitrates = priv->rates;
556 priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
557 priv->band.channels = priv->channels;
558 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
559 skb_queue_head_init(&priv->bc_ps_buf);
560
561 SET_IEEE80211_DEV(hw, dmdev);
562
563 INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
564 INIT_WORK(&priv->tx_work, lbtf_tx_work);
565 if (ieee80211_register_hw(hw))
566 goto err_init_adapter;
567
568 goto done;
569
570 err_init_adapter:
571 lbtf_free_adapter(priv);
572 ieee80211_free_hw(hw);
573 priv = NULL;
574
575 done:
576 return priv;
577 }
578 EXPORT_SYMBOL_GPL(lbtf_add_card);
579
580
581 int lbtf_remove_card(struct lbtf_private *priv)
582 {
583 struct ieee80211_hw *hw = priv->hw;
584
585 priv->surpriseremoved = 1;
586 del_timer(&priv->command_timer);
587 lbtf_free_adapter(priv);
588 priv->hw = NULL;
589 ieee80211_unregister_hw(hw);
590 ieee80211_free_hw(hw);
591
592 return 0;
593 }
594 EXPORT_SYMBOL_GPL(lbtf_remove_card);
595
596 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
597 {
598 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
599
600 ieee80211_tx_info_clear_status(info);
601 /*
602 * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
603 * default pid rc algorithm.
604 *
605 * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
606 */
607 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
608 info->flags |= IEEE80211_TX_STAT_ACK;
609 skb_pull(priv->tx_skb, sizeof(struct txpd));
610 ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
611 priv->tx_skb = NULL;
612 if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
613 ieee80211_wake_queues(priv->hw);
614 else
615 queue_work(lbtf_wq, &priv->tx_work);
616 }
617 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
618
619 void lbtf_bcn_sent(struct lbtf_private *priv)
620 {
621 struct sk_buff *skb = NULL;
622
623 if (priv->vif->type != NL80211_IFTYPE_AP)
624 return;
625
626 if (skb_queue_empty(&priv->bc_ps_buf)) {
627 bool tx_buff_bc = 0;
628
629 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
630 skb_queue_tail(&priv->bc_ps_buf, skb);
631 tx_buff_bc = 1;
632 }
633 if (tx_buff_bc) {
634 ieee80211_stop_queues(priv->hw);
635 queue_work(lbtf_wq, &priv->tx_work);
636 }
637 }
638
639 skb = ieee80211_beacon_get(priv->hw, priv->vif);
640
641 if (skb) {
642 lbtf_beacon_set(priv, skb);
643 kfree_skb(skb);
644 }
645 }
646 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
647
648 static int __init lbtf_init_module(void)
649 {
650 lbtf_wq = create_workqueue("libertastf");
651 if (lbtf_wq == NULL) {
652 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
653 return -ENOMEM;
654 }
655 return 0;
656 }
657
658 static void __exit lbtf_exit_module(void)
659 {
660 destroy_workqueue(lbtf_wq);
661 }
662
663 module_init(lbtf_init_module);
664 module_exit(lbtf_exit_module);
665
666 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
667 MODULE_AUTHOR("Cozybit Inc.");
668 MODULE_LICENSE("GPL");
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