net: remove interrupt.h inclusion from netdevice.h
[linux-3.10.git] / 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/hardirq.h>
13 #include <linux/slab.h>
14
15 #include <linux/etherdevice.h>
16 #include "libertas_tf.h"
17
18 #define DRIVER_RELEASE_VERSION "004.p0"
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 static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION
30 #ifdef DEBUG
31         "-dbg"
32 #endif
33         "";
34
35 struct workqueue_struct *lbtf_wq;
36
37 static const struct ieee80211_channel lbtf_channels[] = {
38         { .center_freq = 2412, .hw_value = 1 },
39         { .center_freq = 2417, .hw_value = 2 },
40         { .center_freq = 2422, .hw_value = 3 },
41         { .center_freq = 2427, .hw_value = 4 },
42         { .center_freq = 2432, .hw_value = 5 },
43         { .center_freq = 2437, .hw_value = 6 },
44         { .center_freq = 2442, .hw_value = 7 },
45         { .center_freq = 2447, .hw_value = 8 },
46         { .center_freq = 2452, .hw_value = 9 },
47         { .center_freq = 2457, .hw_value = 10 },
48         { .center_freq = 2462, .hw_value = 11 },
49         { .center_freq = 2467, .hw_value = 12 },
50         { .center_freq = 2472, .hw_value = 13 },
51         { .center_freq = 2484, .hw_value = 14 },
52 };
53
54 /* This table contains the hardware specific values for the modulation rates. */
55 static const struct ieee80211_rate lbtf_rates[] = {
56         { .bitrate = 10,
57           .hw_value = 0, },
58         { .bitrate = 20,
59           .hw_value = 1,
60           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
61         { .bitrate = 55,
62           .hw_value = 2,
63           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
64         { .bitrate = 110,
65           .hw_value = 3,
66           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
67         { .bitrate = 60,
68           .hw_value = 5,
69           .flags = 0 },
70         { .bitrate = 90,
71           .hw_value = 6,
72           .flags = 0 },
73         { .bitrate = 120,
74           .hw_value = 7,
75           .flags = 0 },
76         { .bitrate = 180,
77           .hw_value = 8,
78           .flags = 0 },
79         { .bitrate = 240,
80           .hw_value = 9,
81           .flags = 0 },
82         { .bitrate = 360,
83           .hw_value = 10,
84           .flags = 0 },
85         { .bitrate = 480,
86           .hw_value = 11,
87           .flags = 0 },
88         { .bitrate = 540,
89           .hw_value = 12,
90           .flags = 0 },
91 };
92
93 static void lbtf_cmd_work(struct work_struct *work)
94 {
95         struct lbtf_private *priv = container_of(work, struct lbtf_private,
96                                          cmd_work);
97
98         lbtf_deb_enter(LBTF_DEB_CMD);
99
100         spin_lock_irq(&priv->driver_lock);
101         /* command response? */
102         if (priv->cmd_response_rxed) {
103                 priv->cmd_response_rxed = 0;
104                 spin_unlock_irq(&priv->driver_lock);
105                 lbtf_process_rx_command(priv);
106                 spin_lock_irq(&priv->driver_lock);
107         }
108
109         if (priv->cmd_timed_out && priv->cur_cmd) {
110                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
111
112                 if (++priv->nr_retries > 10) {
113                         lbtf_complete_command(priv, cmdnode,
114                                               -ETIMEDOUT);
115                         priv->nr_retries = 0;
116                 } else {
117                         priv->cur_cmd = NULL;
118
119                         /* Stick it back at the _top_ of the pending
120                          * queue for immediate resubmission */
121                         list_add(&cmdnode->list, &priv->cmdpendingq);
122                 }
123         }
124         priv->cmd_timed_out = 0;
125         spin_unlock_irq(&priv->driver_lock);
126
127         if (!priv->fw_ready) {
128                 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
129                 return;
130         }
131
132         /* Execute the next command */
133         if (!priv->cur_cmd)
134                 lbtf_execute_next_command(priv);
135
136         lbtf_deb_leave(LBTF_DEB_CMD);
137 }
138
139 /**
140  *  lbtf_setup_firmware: initialize firmware.
141  *
142  *  @priv    A pointer to struct lbtf_private structure
143  *
144  *  Returns: 0 on success.
145  */
146 static int lbtf_setup_firmware(struct lbtf_private *priv)
147 {
148         int ret = -1;
149
150         lbtf_deb_enter(LBTF_DEB_FW);
151         /*
152          * Read priv address from HW
153          */
154         memset(priv->current_addr, 0xff, ETH_ALEN);
155         ret = lbtf_update_hw_spec(priv);
156         if (ret) {
157                 ret = -1;
158                 goto done;
159         }
160
161         lbtf_set_mac_control(priv);
162         lbtf_set_radio_control(priv);
163
164         ret = 0;
165 done:
166         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
167         return ret;
168 }
169
170 /**
171  *  This function handles the timeout of command sending.
172  *  It will re-send the same command again.
173  */
174 static void command_timer_fn(unsigned long data)
175 {
176         struct lbtf_private *priv = (struct lbtf_private *)data;
177         unsigned long flags;
178         lbtf_deb_enter(LBTF_DEB_CMD);
179
180         spin_lock_irqsave(&priv->driver_lock, flags);
181
182         if (!priv->cur_cmd) {
183                 printk(KERN_DEBUG "libertastf: command timer expired; "
184                                   "no pending command\n");
185                 goto out;
186         }
187
188         printk(KERN_DEBUG "libertas: command %x timed out\n",
189                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
190
191         priv->cmd_timed_out = 1;
192         queue_work(lbtf_wq, &priv->cmd_work);
193 out:
194         spin_unlock_irqrestore(&priv->driver_lock, flags);
195         lbtf_deb_leave(LBTF_DEB_CMD);
196 }
197
198 static int lbtf_init_adapter(struct lbtf_private *priv)
199 {
200         lbtf_deb_enter(LBTF_DEB_MAIN);
201         memset(priv->current_addr, 0xff, ETH_ALEN);
202         mutex_init(&priv->lock);
203
204         priv->vif = NULL;
205         setup_timer(&priv->command_timer, command_timer_fn,
206                 (unsigned long)priv);
207
208         INIT_LIST_HEAD(&priv->cmdfreeq);
209         INIT_LIST_HEAD(&priv->cmdpendingq);
210
211         spin_lock_init(&priv->driver_lock);
212
213         /* Allocate the command buffers */
214         if (lbtf_allocate_cmd_buffer(priv))
215                 return -1;
216
217         lbtf_deb_leave(LBTF_DEB_MAIN);
218         return 0;
219 }
220
221 static void lbtf_free_adapter(struct lbtf_private *priv)
222 {
223         lbtf_deb_enter(LBTF_DEB_MAIN);
224         lbtf_free_cmd_buffer(priv);
225         del_timer(&priv->command_timer);
226         lbtf_deb_leave(LBTF_DEB_MAIN);
227 }
228
229 static void lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
230 {
231         struct lbtf_private *priv = hw->priv;
232
233         priv->skb_to_tx = skb;
234         queue_work(lbtf_wq, &priv->tx_work);
235         /*
236          * queue will be restarted when we receive transmission feedback if
237          * there are no buffered multicast frames to send
238          */
239         ieee80211_stop_queues(priv->hw);
240 }
241
242 static void lbtf_tx_work(struct work_struct *work)
243 {
244         struct lbtf_private *priv = container_of(work, struct lbtf_private,
245                                          tx_work);
246         unsigned int len;
247         struct ieee80211_tx_info *info;
248         struct txpd *txpd;
249         struct sk_buff *skb = NULL;
250         int err;
251
252         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
253
254         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
255             (!skb_queue_empty(&priv->bc_ps_buf)))
256                 skb = skb_dequeue(&priv->bc_ps_buf);
257         else if (priv->skb_to_tx) {
258                 skb = priv->skb_to_tx;
259                 priv->skb_to_tx = NULL;
260         } else {
261                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
262                 return;
263         }
264
265         len = skb->len;
266         info  = IEEE80211_SKB_CB(skb);
267         txpd = (struct txpd *)  skb_push(skb, sizeof(struct txpd));
268
269         if (priv->surpriseremoved) {
270                 dev_kfree_skb_any(skb);
271                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
272                 return;
273         }
274
275         memset(txpd, 0, sizeof(struct txpd));
276         /* Activate per-packet rate selection */
277         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
278                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
279
280         /* copy destination address from 802.11 header */
281         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
282                 ETH_ALEN);
283         txpd->tx_packet_length = cpu_to_le16(len);
284         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
285         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
286         BUG_ON(priv->tx_skb);
287         spin_lock_irq(&priv->driver_lock);
288         priv->tx_skb = skb;
289         err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
290         spin_unlock_irq(&priv->driver_lock);
291         if (err) {
292                 dev_kfree_skb_any(skb);
293                 priv->tx_skb = NULL;
294                 pr_err("TX error: %d", err);
295         }
296         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
297 }
298
299 static int lbtf_op_start(struct ieee80211_hw *hw)
300 {
301         struct lbtf_private *priv = hw->priv;
302         void *card = priv->card;
303         int ret = -1;
304
305         lbtf_deb_enter(LBTF_DEB_MACOPS);
306
307         if (!priv->fw_ready)
308                 /* Upload firmware */
309                 if (priv->hw_prog_firmware(card))
310                         goto err_prog_firmware;
311
312         /* poke the firmware */
313         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
314         priv->radioon = RADIO_ON;
315         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
316         ret = lbtf_setup_firmware(priv);
317         if (ret)
318                 goto err_prog_firmware;
319
320         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
321             (priv->fwrelease > LBTF_FW_VER_MAX)) {
322                 ret = -1;
323                 goto err_prog_firmware;
324         }
325
326         printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
327         lbtf_deb_leave(LBTF_DEB_MACOPS);
328         return 0;
329
330 err_prog_firmware:
331         priv->hw_reset_device(card);
332         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programing fw; ret=%d", ret);
333         return ret;
334 }
335
336 static void lbtf_op_stop(struct ieee80211_hw *hw)
337 {
338         struct lbtf_private *priv = hw->priv;
339         unsigned long flags;
340         struct sk_buff *skb;
341
342         struct cmd_ctrl_node *cmdnode;
343
344         lbtf_deb_enter(LBTF_DEB_MACOPS);
345
346         /* Flush pending command nodes */
347         spin_lock_irqsave(&priv->driver_lock, flags);
348         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
349                 cmdnode->result = -ENOENT;
350                 cmdnode->cmdwaitqwoken = 1;
351                 wake_up_interruptible(&cmdnode->cmdwait_q);
352         }
353
354         spin_unlock_irqrestore(&priv->driver_lock, flags);
355         cancel_work_sync(&priv->cmd_work);
356         cancel_work_sync(&priv->tx_work);
357         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
358                 dev_kfree_skb_any(skb);
359         priv->radioon = RADIO_OFF;
360         lbtf_set_radio_control(priv);
361
362         lbtf_deb_leave(LBTF_DEB_MACOPS);
363 }
364
365 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
366                         struct ieee80211_vif *vif)
367 {
368         struct lbtf_private *priv = hw->priv;
369         lbtf_deb_enter(LBTF_DEB_MACOPS);
370         if (priv->vif != NULL)
371                 return -EOPNOTSUPP;
372
373         priv->vif = vif;
374         switch (vif->type) {
375         case NL80211_IFTYPE_MESH_POINT:
376         case NL80211_IFTYPE_AP:
377                 lbtf_set_mode(priv, LBTF_AP_MODE);
378                 break;
379         case NL80211_IFTYPE_STATION:
380                 lbtf_set_mode(priv, LBTF_STA_MODE);
381                 break;
382         default:
383                 priv->vif = NULL;
384                 return -EOPNOTSUPP;
385         }
386         lbtf_set_mac_address(priv, (u8 *) vif->addr);
387         lbtf_deb_leave(LBTF_DEB_MACOPS);
388         return 0;
389 }
390
391 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
392                         struct ieee80211_vif *vif)
393 {
394         struct lbtf_private *priv = hw->priv;
395         lbtf_deb_enter(LBTF_DEB_MACOPS);
396
397         if (priv->vif->type == NL80211_IFTYPE_AP ||
398             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
399                 lbtf_beacon_ctrl(priv, 0, 0);
400         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
401         lbtf_set_bssid(priv, 0, NULL);
402         priv->vif = NULL;
403         lbtf_deb_leave(LBTF_DEB_MACOPS);
404 }
405
406 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
407 {
408         struct lbtf_private *priv = hw->priv;
409         struct ieee80211_conf *conf = &hw->conf;
410         lbtf_deb_enter(LBTF_DEB_MACOPS);
411
412         if (conf->channel->center_freq != priv->cur_freq) {
413                 priv->cur_freq = conf->channel->center_freq;
414                 lbtf_set_channel(priv, conf->channel->hw_value);
415         }
416         lbtf_deb_leave(LBTF_DEB_MACOPS);
417         return 0;
418 }
419
420 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
421                                      struct netdev_hw_addr_list *mc_list)
422 {
423         struct lbtf_private *priv = hw->priv;
424         int i;
425         struct netdev_hw_addr *ha;
426         int mc_count = netdev_hw_addr_list_count(mc_list);
427
428         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
429                 return mc_count;
430
431         priv->nr_of_multicastmacaddr = mc_count;
432         i = 0;
433         netdev_hw_addr_list_for_each(ha, mc_list)
434                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
435
436         return mc_count;
437 }
438
439 #define SUPPORTED_FIF_FLAGS  (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
440 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
441                         unsigned int changed_flags,
442                         unsigned int *new_flags,
443                         u64 multicast)
444 {
445         struct lbtf_private *priv = hw->priv;
446         int old_mac_control = priv->mac_control;
447
448         lbtf_deb_enter(LBTF_DEB_MACOPS);
449
450         changed_flags &= SUPPORTED_FIF_FLAGS;
451         *new_flags &= SUPPORTED_FIF_FLAGS;
452
453         if (!changed_flags) {
454                 lbtf_deb_leave(LBTF_DEB_MACOPS);
455                 return;
456         }
457
458         if (*new_flags & (FIF_PROMISC_IN_BSS))
459                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
460         else
461                 priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
462         if (*new_flags & (FIF_ALLMULTI) ||
463             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
464                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
465                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
466         } else if (multicast) {
467                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
468                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
469                 lbtf_cmd_set_mac_multicast_addr(priv);
470         } else {
471                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
472                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
473                 if (priv->nr_of_multicastmacaddr) {
474                         priv->nr_of_multicastmacaddr = 0;
475                         lbtf_cmd_set_mac_multicast_addr(priv);
476                 }
477         }
478
479
480         if (priv->mac_control != old_mac_control)
481                 lbtf_set_mac_control(priv);
482
483         lbtf_deb_leave(LBTF_DEB_MACOPS);
484 }
485
486 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
487                         struct ieee80211_vif *vif,
488                         struct ieee80211_bss_conf *bss_conf,
489                         u32 changes)
490 {
491         struct lbtf_private *priv = hw->priv;
492         struct sk_buff *beacon;
493         lbtf_deb_enter(LBTF_DEB_MACOPS);
494
495         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
496                 switch (priv->vif->type) {
497                 case NL80211_IFTYPE_AP:
498                 case NL80211_IFTYPE_MESH_POINT:
499                         beacon = ieee80211_beacon_get(hw, vif);
500                         if (beacon) {
501                                 lbtf_beacon_set(priv, beacon);
502                                 kfree_skb(beacon);
503                                 lbtf_beacon_ctrl(priv, 1,
504                                                  bss_conf->beacon_int);
505                         }
506                         break;
507                 default:
508                         break;
509                 }
510         }
511
512         if (changes & BSS_CHANGED_BSSID) {
513                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
514                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
515         }
516
517         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
518                 if (bss_conf->use_short_preamble)
519                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
520                 else
521                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
522                 lbtf_set_radio_control(priv);
523         }
524
525         lbtf_deb_leave(LBTF_DEB_MACOPS);
526 }
527
528 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
529                                 struct survey_info *survey)
530 {
531         struct lbtf_private *priv = hw->priv;
532         struct ieee80211_conf *conf = &hw->conf;
533
534         if (idx != 0)
535                 return -ENOENT;
536
537         survey->channel = conf->channel;
538         survey->filled = SURVEY_INFO_NOISE_DBM;
539         survey->noise = priv->noise;
540
541         return 0;
542 }
543
544 static const struct ieee80211_ops lbtf_ops = {
545         .tx                     = lbtf_op_tx,
546         .start                  = lbtf_op_start,
547         .stop                   = lbtf_op_stop,
548         .add_interface          = lbtf_op_add_interface,
549         .remove_interface       = lbtf_op_remove_interface,
550         .config                 = lbtf_op_config,
551         .prepare_multicast      = lbtf_op_prepare_multicast,
552         .configure_filter       = lbtf_op_configure_filter,
553         .bss_info_changed       = lbtf_op_bss_info_changed,
554         .get_survey             = lbtf_op_get_survey,
555 };
556
557 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
558 {
559         struct ieee80211_rx_status stats;
560         struct rxpd *prxpd;
561         int need_padding;
562         unsigned int flags;
563         struct ieee80211_hdr *hdr;
564
565         lbtf_deb_enter(LBTF_DEB_RX);
566
567         prxpd = (struct rxpd *) skb->data;
568
569         memset(&stats, 0, sizeof(stats));
570         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
571                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
572         stats.freq = priv->cur_freq;
573         stats.band = IEEE80211_BAND_2GHZ;
574         stats.signal = prxpd->snr;
575         priv->noise = prxpd->nf;
576         /* Marvell rate index has a hole at value 4 */
577         if (prxpd->rx_rate > 4)
578                 --prxpd->rx_rate;
579         stats.rate_idx = prxpd->rx_rate;
580         skb_pull(skb, sizeof(struct rxpd));
581
582         hdr = (struct ieee80211_hdr *)skb->data;
583         flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
584
585         need_padding = ieee80211_is_data_qos(hdr->frame_control);
586         need_padding ^= ieee80211_has_a4(hdr->frame_control);
587         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
588                         (*ieee80211_get_qos_ctl(hdr) &
589                          IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
590
591         if (need_padding) {
592                 memmove(skb->data + 2, skb->data, skb->len);
593                 skb_reserve(skb, 2);
594         }
595
596         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
597
598         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
599                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
600         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
601                      min_t(unsigned int, skb->len, 100));
602
603         ieee80211_rx_irqsafe(priv->hw, skb);
604
605         lbtf_deb_leave(LBTF_DEB_RX);
606         return 0;
607 }
608 EXPORT_SYMBOL_GPL(lbtf_rx);
609
610 /**
611  * lbtf_add_card: Add and initialize the card, no fw upload yet.
612  *
613  *  @card    A pointer to card
614  *
615  *  Returns: pointer to struct lbtf_priv.
616  */
617 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
618 {
619         struct ieee80211_hw *hw;
620         struct lbtf_private *priv = NULL;
621
622         lbtf_deb_enter(LBTF_DEB_MAIN);
623
624         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
625         if (!hw)
626                 goto done;
627
628         priv = hw->priv;
629         if (lbtf_init_adapter(priv))
630                 goto err_init_adapter;
631
632         priv->hw = hw;
633         priv->card = card;
634         priv->tx_skb = NULL;
635
636         hw->queues = 1;
637         hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
638         hw->extra_tx_headroom = sizeof(struct txpd);
639         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
640         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
641         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
642         priv->band.bitrates = priv->rates;
643         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
644         priv->band.channels = priv->channels;
645         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
646         hw->wiphy->interface_modes =
647                 BIT(NL80211_IFTYPE_STATION) |
648                 BIT(NL80211_IFTYPE_ADHOC);
649         skb_queue_head_init(&priv->bc_ps_buf);
650
651         SET_IEEE80211_DEV(hw, dmdev);
652
653         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
654         INIT_WORK(&priv->tx_work, lbtf_tx_work);
655         if (ieee80211_register_hw(hw))
656                 goto err_init_adapter;
657
658         goto done;
659
660 err_init_adapter:
661         lbtf_free_adapter(priv);
662         ieee80211_free_hw(hw);
663         priv = NULL;
664
665 done:
666         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
667         return priv;
668 }
669 EXPORT_SYMBOL_GPL(lbtf_add_card);
670
671
672 int lbtf_remove_card(struct lbtf_private *priv)
673 {
674         struct ieee80211_hw *hw = priv->hw;
675
676         lbtf_deb_enter(LBTF_DEB_MAIN);
677
678         priv->surpriseremoved = 1;
679         del_timer(&priv->command_timer);
680         lbtf_free_adapter(priv);
681         priv->hw = NULL;
682         ieee80211_unregister_hw(hw);
683         ieee80211_free_hw(hw);
684
685     lbtf_deb_leave(LBTF_DEB_MAIN);
686         return 0;
687 }
688 EXPORT_SYMBOL_GPL(lbtf_remove_card);
689
690 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
691 {
692         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
693
694         ieee80211_tx_info_clear_status(info);
695         /*
696          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
697          * default pid rc algorithm.
698          *
699          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
700          */
701         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
702                 info->flags |= IEEE80211_TX_STAT_ACK;
703         skb_pull(priv->tx_skb, sizeof(struct txpd));
704         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
705         priv->tx_skb = NULL;
706         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
707                 ieee80211_wake_queues(priv->hw);
708         else
709                 queue_work(lbtf_wq, &priv->tx_work);
710 }
711 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
712
713 void lbtf_bcn_sent(struct lbtf_private *priv)
714 {
715         struct sk_buff *skb = NULL;
716
717         if (priv->vif->type != NL80211_IFTYPE_AP)
718                 return;
719
720         if (skb_queue_empty(&priv->bc_ps_buf)) {
721                 bool tx_buff_bc = 0;
722
723                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
724                         skb_queue_tail(&priv->bc_ps_buf, skb);
725                         tx_buff_bc = 1;
726                 }
727                 if (tx_buff_bc) {
728                         ieee80211_stop_queues(priv->hw);
729                         queue_work(lbtf_wq, &priv->tx_work);
730                 }
731         }
732
733         skb = ieee80211_beacon_get(priv->hw, priv->vif);
734
735         if (skb) {
736                 lbtf_beacon_set(priv, skb);
737                 kfree_skb(skb);
738         }
739 }
740 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
741
742 static int __init lbtf_init_module(void)
743 {
744         lbtf_deb_enter(LBTF_DEB_MAIN);
745         lbtf_wq = create_workqueue("libertastf");
746         if (lbtf_wq == NULL) {
747                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
748                 return -ENOMEM;
749         }
750         lbtf_deb_leave(LBTF_DEB_MAIN);
751         return 0;
752 }
753
754 static void __exit lbtf_exit_module(void)
755 {
756         lbtf_deb_enter(LBTF_DEB_MAIN);
757         destroy_workqueue(lbtf_wq);
758         lbtf_deb_leave(LBTF_DEB_MAIN);
759 }
760
761 module_init(lbtf_init_module);
762 module_exit(lbtf_exit_module);
763
764 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
765 MODULE_AUTHOR("Cozybit Inc.");
766 MODULE_LICENSE("GPL");