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 #define DRIVER_RELEASE_VERSION "004.p0"
20 /* thinfirm version: 5.132.X.pX */
21 #define LBTF_FW_VER_MIN 0x05840300
22 #define LBTF_FW_VER_MAX 0x0584ffff
23 #define QOS_CONTROL_LEN 2
24
25 /* Module parameters */
26 unsigned int lbtf_debug;
27 EXPORT_SYMBOL_GPL(lbtf_debug);
28 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
29
30 static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION
31 #ifdef DEBUG
32 "-dbg"
33 #endif
34 "";
35
36 struct workqueue_struct *lbtf_wq;
37
38 static const struct ieee80211_channel lbtf_channels[] = {
39 { .center_freq = 2412, .hw_value = 1 },
40 { .center_freq = 2417, .hw_value = 2 },
41 { .center_freq = 2422, .hw_value = 3 },
42 { .center_freq = 2427, .hw_value = 4 },
43 { .center_freq = 2432, .hw_value = 5 },
44 { .center_freq = 2437, .hw_value = 6 },
45 { .center_freq = 2442, .hw_value = 7 },
46 { .center_freq = 2447, .hw_value = 8 },
47 { .center_freq = 2452, .hw_value = 9 },
48 { .center_freq = 2457, .hw_value = 10 },
49 { .center_freq = 2462, .hw_value = 11 },
50 { .center_freq = 2467, .hw_value = 12 },
51 { .center_freq = 2472, .hw_value = 13 },
52 { .center_freq = 2484, .hw_value = 14 },
53 };
54
55 /* This table contains the hardware specific values for the modulation rates. */
56 static const struct ieee80211_rate lbtf_rates[] = {
57 { .bitrate = 10,
58 .hw_value = 0, },
59 { .bitrate = 20,
60 .hw_value = 1,
61 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
62 { .bitrate = 55,
63 .hw_value = 2,
64 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
65 { .bitrate = 110,
66 .hw_value = 3,
67 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
68 { .bitrate = 60,
69 .hw_value = 5,
70 .flags = 0 },
71 { .bitrate = 90,
72 .hw_value = 6,
73 .flags = 0 },
74 { .bitrate = 120,
75 .hw_value = 7,
76 .flags = 0 },
77 { .bitrate = 180,
78 .hw_value = 8,
79 .flags = 0 },
80 { .bitrate = 240,
81 .hw_value = 9,
82 .flags = 0 },
83 { .bitrate = 360,
84 .hw_value = 10,
85 .flags = 0 },
86 { .bitrate = 480,
87 .hw_value = 11,
88 .flags = 0 },
89 { .bitrate = 540,
90 .hw_value = 12,
91 .flags = 0 },
92 };
93
lbtf_cmd_work(struct work_struct * work)94 static void lbtf_cmd_work(struct work_struct *work)
95 {
96 struct lbtf_private *priv = container_of(work, struct lbtf_private,
97 cmd_work);
98
99 lbtf_deb_enter(LBTF_DEB_CMD);
100
101 spin_lock_irq(&priv->driver_lock);
102 /* command response? */
103 if (priv->cmd_response_rxed) {
104 priv->cmd_response_rxed = 0;
105 spin_unlock_irq(&priv->driver_lock);
106 lbtf_process_rx_command(priv);
107 spin_lock_irq(&priv->driver_lock);
108 }
109
110 if (priv->cmd_timed_out && priv->cur_cmd) {
111 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
112
113 if (++priv->nr_retries > 10) {
114 lbtf_complete_command(priv, cmdnode,
115 -ETIMEDOUT);
116 priv->nr_retries = 0;
117 } else {
118 priv->cur_cmd = NULL;
119
120 /* Stick it back at the _top_ of the pending
121 * queue for immediate resubmission */
122 list_add(&cmdnode->list, &priv->cmdpendingq);
123 }
124 }
125 priv->cmd_timed_out = 0;
126 spin_unlock_irq(&priv->driver_lock);
127
128 if (!priv->fw_ready) {
129 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
130 return;
131 }
132
133 /* Execute the next command */
134 if (!priv->cur_cmd)
135 lbtf_execute_next_command(priv);
136
137 lbtf_deb_leave(LBTF_DEB_CMD);
138 }
139
140 /**
141 * lbtf_setup_firmware: initialize firmware.
142 *
143 * @priv A pointer to struct lbtf_private structure
144 *
145 * Returns: 0 on success.
146 */
lbtf_setup_firmware(struct lbtf_private * priv)147 static int lbtf_setup_firmware(struct lbtf_private *priv)
148 {
149 int ret = -1;
150
151 lbtf_deb_enter(LBTF_DEB_FW);
152 /*
153 * Read priv address from HW
154 */
155 memset(priv->current_addr, 0xff, ETH_ALEN);
156 ret = lbtf_update_hw_spec(priv);
157 if (ret) {
158 ret = -1;
159 goto done;
160 }
161
162 lbtf_set_mac_control(priv);
163 lbtf_set_radio_control(priv);
164
165 ret = 0;
166 done:
167 lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
168 return ret;
169 }
170
171 /**
172 * This function handles the timeout of command sending.
173 * It will re-send the same command again.
174 */
command_timer_fn(unsigned long data)175 static void command_timer_fn(unsigned long data)
176 {
177 struct lbtf_private *priv = (struct lbtf_private *)data;
178 unsigned long flags;
179 lbtf_deb_enter(LBTF_DEB_CMD);
180
181 spin_lock_irqsave(&priv->driver_lock, flags);
182
183 if (!priv->cur_cmd) {
184 printk(KERN_DEBUG "libertastf: command timer expired; "
185 "no pending command\n");
186 goto out;
187 }
188
189 printk(KERN_DEBUG "libertas: command %x timed out\n",
190 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
191
192 priv->cmd_timed_out = 1;
193 queue_work(lbtf_wq, &priv->cmd_work);
194 out:
195 spin_unlock_irqrestore(&priv->driver_lock, flags);
196 lbtf_deb_leave(LBTF_DEB_CMD);
197 }
198
lbtf_init_adapter(struct lbtf_private * priv)199 static int lbtf_init_adapter(struct lbtf_private *priv)
200 {
201 lbtf_deb_enter(LBTF_DEB_MAIN);
202 memset(priv->current_addr, 0xff, ETH_ALEN);
203 mutex_init(&priv->lock);
204
205 priv->vif = NULL;
206 setup_timer(&priv->command_timer, command_timer_fn,
207 (unsigned long)priv);
208
209 INIT_LIST_HEAD(&priv->cmdfreeq);
210 INIT_LIST_HEAD(&priv->cmdpendingq);
211
212 spin_lock_init(&priv->driver_lock);
213
214 /* Allocate the command buffers */
215 if (lbtf_allocate_cmd_buffer(priv))
216 return -1;
217
218 lbtf_deb_leave(LBTF_DEB_MAIN);
219 return 0;
220 }
221
lbtf_free_adapter(struct lbtf_private * priv)222 static void lbtf_free_adapter(struct lbtf_private *priv)
223 {
224 lbtf_deb_enter(LBTF_DEB_MAIN);
225 lbtf_free_cmd_buffer(priv);
226 del_timer(&priv->command_timer);
227 lbtf_deb_leave(LBTF_DEB_MAIN);
228 }
229
lbtf_op_tx(struct ieee80211_hw * hw,struct sk_buff * skb)230 static void lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
231 {
232 struct lbtf_private *priv = hw->priv;
233
234 priv->skb_to_tx = skb;
235 queue_work(lbtf_wq, &priv->tx_work);
236 /*
237 * queue will be restarted when we receive transmission feedback if
238 * there are no buffered multicast frames to send
239 */
240 ieee80211_stop_queues(priv->hw);
241 }
242
lbtf_tx_work(struct work_struct * work)243 static void lbtf_tx_work(struct work_struct *work)
244 {
245 struct lbtf_private *priv = container_of(work, struct lbtf_private,
246 tx_work);
247 unsigned int len;
248 struct ieee80211_tx_info *info;
249 struct txpd *txpd;
250 struct sk_buff *skb = NULL;
251 int err;
252
253 lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
254
255 if ((priv->vif->type == NL80211_IFTYPE_AP) &&
256 (!skb_queue_empty(&priv->bc_ps_buf)))
257 skb = skb_dequeue(&priv->bc_ps_buf);
258 else if (priv->skb_to_tx) {
259 skb = priv->skb_to_tx;
260 priv->skb_to_tx = NULL;
261 } else {
262 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
263 return;
264 }
265
266 len = skb->len;
267 info = IEEE80211_SKB_CB(skb);
268 txpd = (struct txpd *) skb_push(skb, sizeof(struct txpd));
269
270 if (priv->surpriseremoved) {
271 dev_kfree_skb_any(skb);
272 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
273 return;
274 }
275
276 memset(txpd, 0, sizeof(struct txpd));
277 /* Activate per-packet rate selection */
278 txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
279 ieee80211_get_tx_rate(priv->hw, info)->hw_value);
280
281 /* copy destination address from 802.11 header */
282 memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
283 ETH_ALEN);
284 txpd->tx_packet_length = cpu_to_le16(len);
285 txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
286 lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
287 BUG_ON(priv->tx_skb);
288 spin_lock_irq(&priv->driver_lock);
289 priv->tx_skb = skb;
290 err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
291 spin_unlock_irq(&priv->driver_lock);
292 if (err) {
293 dev_kfree_skb_any(skb);
294 priv->tx_skb = NULL;
295 pr_err("TX error: %d", err);
296 }
297 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
298 }
299
lbtf_op_start(struct ieee80211_hw * hw)300 static int lbtf_op_start(struct ieee80211_hw *hw)
301 {
302 struct lbtf_private *priv = hw->priv;
303 void *card = priv->card;
304 int ret = -1;
305
306 lbtf_deb_enter(LBTF_DEB_MACOPS);
307
308 if (!priv->fw_ready)
309 /* Upload firmware */
310 if (priv->hw_prog_firmware(card))
311 goto err_prog_firmware;
312
313 /* poke the firmware */
314 priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
315 priv->radioon = RADIO_ON;
316 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
317 ret = lbtf_setup_firmware(priv);
318 if (ret)
319 goto err_prog_firmware;
320
321 if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
322 (priv->fwrelease > LBTF_FW_VER_MAX)) {
323 ret = -1;
324 goto err_prog_firmware;
325 }
326
327 printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
328 lbtf_deb_leave(LBTF_DEB_MACOPS);
329 return 0;
330
331 err_prog_firmware:
332 priv->hw_reset_device(card);
333 lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programing fw; ret=%d", ret);
334 return ret;
335 }
336
lbtf_op_stop(struct ieee80211_hw * hw)337 static void lbtf_op_stop(struct ieee80211_hw *hw)
338 {
339 struct lbtf_private *priv = hw->priv;
340 unsigned long flags;
341 struct sk_buff *skb;
342
343 struct cmd_ctrl_node *cmdnode;
344
345 lbtf_deb_enter(LBTF_DEB_MACOPS);
346
347 /* Flush pending command nodes */
348 spin_lock_irqsave(&priv->driver_lock, flags);
349 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
350 cmdnode->result = -ENOENT;
351 cmdnode->cmdwaitqwoken = 1;
352 wake_up_interruptible(&cmdnode->cmdwait_q);
353 }
354
355 spin_unlock_irqrestore(&priv->driver_lock, flags);
356 cancel_work_sync(&priv->cmd_work);
357 cancel_work_sync(&priv->tx_work);
358 while ((skb = skb_dequeue(&priv->bc_ps_buf)))
359 dev_kfree_skb_any(skb);
360 priv->radioon = RADIO_OFF;
361 lbtf_set_radio_control(priv);
362
363 lbtf_deb_leave(LBTF_DEB_MACOPS);
364 }
365
lbtf_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)366 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
367 struct ieee80211_vif *vif)
368 {
369 struct lbtf_private *priv = hw->priv;
370 lbtf_deb_enter(LBTF_DEB_MACOPS);
371 if (priv->vif != NULL)
372 return -EOPNOTSUPP;
373
374 priv->vif = vif;
375 switch (vif->type) {
376 case NL80211_IFTYPE_MESH_POINT:
377 case NL80211_IFTYPE_AP:
378 lbtf_set_mode(priv, LBTF_AP_MODE);
379 break;
380 case NL80211_IFTYPE_STATION:
381 lbtf_set_mode(priv, LBTF_STA_MODE);
382 break;
383 default:
384 priv->vif = NULL;
385 return -EOPNOTSUPP;
386 }
387 lbtf_set_mac_address(priv, (u8 *) vif->addr);
388 lbtf_deb_leave(LBTF_DEB_MACOPS);
389 return 0;
390 }
391
lbtf_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)392 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
393 struct ieee80211_vif *vif)
394 {
395 struct lbtf_private *priv = hw->priv;
396 lbtf_deb_enter(LBTF_DEB_MACOPS);
397
398 if (priv->vif->type == NL80211_IFTYPE_AP ||
399 priv->vif->type == NL80211_IFTYPE_MESH_POINT)
400 lbtf_beacon_ctrl(priv, 0, 0);
401 lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
402 lbtf_set_bssid(priv, 0, NULL);
403 priv->vif = NULL;
404 lbtf_deb_leave(LBTF_DEB_MACOPS);
405 }
406
lbtf_op_config(struct ieee80211_hw * hw,u32 changed)407 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
408 {
409 struct lbtf_private *priv = hw->priv;
410 struct ieee80211_conf *conf = &hw->conf;
411 lbtf_deb_enter(LBTF_DEB_MACOPS);
412
413 if (conf->channel->center_freq != priv->cur_freq) {
414 priv->cur_freq = conf->channel->center_freq;
415 lbtf_set_channel(priv, conf->channel->hw_value);
416 }
417 lbtf_deb_leave(LBTF_DEB_MACOPS);
418 return 0;
419 }
420
lbtf_op_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)421 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
422 struct netdev_hw_addr_list *mc_list)
423 {
424 struct lbtf_private *priv = hw->priv;
425 int i;
426 struct netdev_hw_addr *ha;
427 int mc_count = netdev_hw_addr_list_count(mc_list);
428
429 if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
430 return mc_count;
431
432 priv->nr_of_multicastmacaddr = mc_count;
433 i = 0;
434 netdev_hw_addr_list_for_each(ha, mc_list)
435 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
436
437 return mc_count;
438 }
439
440 #define SUPPORTED_FIF_FLAGS (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
lbtf_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * new_flags,u64 multicast)441 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
442 unsigned int changed_flags,
443 unsigned int *new_flags,
444 u64 multicast)
445 {
446 struct lbtf_private *priv = hw->priv;
447 int old_mac_control = priv->mac_control;
448
449 lbtf_deb_enter(LBTF_DEB_MACOPS);
450
451 changed_flags &= SUPPORTED_FIF_FLAGS;
452 *new_flags &= SUPPORTED_FIF_FLAGS;
453
454 if (!changed_flags) {
455 lbtf_deb_leave(LBTF_DEB_MACOPS);
456 return;
457 }
458
459 if (*new_flags & (FIF_PROMISC_IN_BSS))
460 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
461 else
462 priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
463 if (*new_flags & (FIF_ALLMULTI) ||
464 multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
465 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
466 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
467 } else if (multicast) {
468 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
469 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
470 lbtf_cmd_set_mac_multicast_addr(priv);
471 } else {
472 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
473 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
474 if (priv->nr_of_multicastmacaddr) {
475 priv->nr_of_multicastmacaddr = 0;
476 lbtf_cmd_set_mac_multicast_addr(priv);
477 }
478 }
479
480
481 if (priv->mac_control != old_mac_control)
482 lbtf_set_mac_control(priv);
483
484 lbtf_deb_leave(LBTF_DEB_MACOPS);
485 }
486
lbtf_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changes)487 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
488 struct ieee80211_vif *vif,
489 struct ieee80211_bss_conf *bss_conf,
490 u32 changes)
491 {
492 struct lbtf_private *priv = hw->priv;
493 struct sk_buff *beacon;
494 lbtf_deb_enter(LBTF_DEB_MACOPS);
495
496 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
497 switch (priv->vif->type) {
498 case NL80211_IFTYPE_AP:
499 case NL80211_IFTYPE_MESH_POINT:
500 beacon = ieee80211_beacon_get(hw, vif);
501 if (beacon) {
502 lbtf_beacon_set(priv, beacon);
503 kfree_skb(beacon);
504 lbtf_beacon_ctrl(priv, 1,
505 bss_conf->beacon_int);
506 }
507 break;
508 default:
509 break;
510 }
511 }
512
513 if (changes & BSS_CHANGED_BSSID) {
514 bool activate = !is_zero_ether_addr(bss_conf->bssid);
515 lbtf_set_bssid(priv, activate, bss_conf->bssid);
516 }
517
518 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
519 if (bss_conf->use_short_preamble)
520 priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
521 else
522 priv->preamble = CMD_TYPE_LONG_PREAMBLE;
523 lbtf_set_radio_control(priv);
524 }
525
526 lbtf_deb_leave(LBTF_DEB_MACOPS);
527 }
528
lbtf_op_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)529 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
530 struct survey_info *survey)
531 {
532 struct lbtf_private *priv = hw->priv;
533 struct ieee80211_conf *conf = &hw->conf;
534
535 if (idx != 0)
536 return -ENOENT;
537
538 survey->channel = conf->channel;
539 survey->filled = SURVEY_INFO_NOISE_DBM;
540 survey->noise = priv->noise;
541
542 return 0;
543 }
544
545 static const struct ieee80211_ops lbtf_ops = {
546 .tx = lbtf_op_tx,
547 .start = lbtf_op_start,
548 .stop = lbtf_op_stop,
549 .add_interface = lbtf_op_add_interface,
550 .remove_interface = lbtf_op_remove_interface,
551 .config = lbtf_op_config,
552 .prepare_multicast = lbtf_op_prepare_multicast,
553 .configure_filter = lbtf_op_configure_filter,
554 .bss_info_changed = lbtf_op_bss_info_changed,
555 .get_survey = lbtf_op_get_survey,
556 };
557
lbtf_rx(struct lbtf_private * priv,struct sk_buff * skb)558 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
559 {
560 struct ieee80211_rx_status stats;
561 struct rxpd *prxpd;
562 int need_padding;
563 unsigned int flags;
564 struct ieee80211_hdr *hdr;
565
566 lbtf_deb_enter(LBTF_DEB_RX);
567
568 prxpd = (struct rxpd *) skb->data;
569
570 memset(&stats, 0, sizeof(stats));
571 if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
572 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
573 stats.freq = priv->cur_freq;
574 stats.band = IEEE80211_BAND_2GHZ;
575 stats.signal = prxpd->snr;
576 priv->noise = prxpd->nf;
577 /* Marvell rate index has a hole at value 4 */
578 if (prxpd->rx_rate > 4)
579 --prxpd->rx_rate;
580 stats.rate_idx = prxpd->rx_rate;
581 skb_pull(skb, sizeof(struct rxpd));
582
583 hdr = (struct ieee80211_hdr *)skb->data;
584 flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
585
586 need_padding = ieee80211_is_data_qos(hdr->frame_control);
587 need_padding ^= ieee80211_has_a4(hdr->frame_control);
588 need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
589 (*ieee80211_get_qos_ctl(hdr) &
590 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
591
592 if (need_padding) {
593 memmove(skb->data + 2, skb->data, skb->len);
594 skb_reserve(skb, 2);
595 }
596
597 memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
598
599 lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
600 skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
601 lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
602 min_t(unsigned int, skb->len, 100));
603
604 ieee80211_rx_irqsafe(priv->hw, skb);
605
606 lbtf_deb_leave(LBTF_DEB_RX);
607 return 0;
608 }
609 EXPORT_SYMBOL_GPL(lbtf_rx);
610
611 /**
612 * lbtf_add_card: Add and initialize the card, no fw upload yet.
613 *
614 * @card A pointer to card
615 *
616 * Returns: pointer to struct lbtf_priv.
617 */
lbtf_add_card(void * card,struct device * dmdev)618 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
619 {
620 struct ieee80211_hw *hw;
621 struct lbtf_private *priv = NULL;
622
623 lbtf_deb_enter(LBTF_DEB_MAIN);
624
625 hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
626 if (!hw)
627 goto done;
628
629 priv = hw->priv;
630 if (lbtf_init_adapter(priv))
631 goto err_init_adapter;
632
633 priv->hw = hw;
634 priv->card = card;
635 priv->tx_skb = NULL;
636
637 hw->queues = 1;
638 hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
639 hw->extra_tx_headroom = sizeof(struct txpd);
640 memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
641 memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
642 priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
643 priv->band.bitrates = priv->rates;
644 priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
645 priv->band.channels = priv->channels;
646 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
647 hw->wiphy->interface_modes =
648 BIT(NL80211_IFTYPE_STATION) |
649 BIT(NL80211_IFTYPE_ADHOC);
650 skb_queue_head_init(&priv->bc_ps_buf);
651
652 SET_IEEE80211_DEV(hw, dmdev);
653
654 INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
655 INIT_WORK(&priv->tx_work, lbtf_tx_work);
656 if (ieee80211_register_hw(hw))
657 goto err_init_adapter;
658
659 goto done;
660
661 err_init_adapter:
662 lbtf_free_adapter(priv);
663 ieee80211_free_hw(hw);
664 priv = NULL;
665
666 done:
667 lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
668 return priv;
669 }
670 EXPORT_SYMBOL_GPL(lbtf_add_card);
671
672
lbtf_remove_card(struct lbtf_private * priv)673 int lbtf_remove_card(struct lbtf_private *priv)
674 {
675 struct ieee80211_hw *hw = priv->hw;
676
677 lbtf_deb_enter(LBTF_DEB_MAIN);
678
679 priv->surpriseremoved = 1;
680 del_timer(&priv->command_timer);
681 lbtf_free_adapter(priv);
682 priv->hw = NULL;
683 ieee80211_unregister_hw(hw);
684 ieee80211_free_hw(hw);
685
686 lbtf_deb_leave(LBTF_DEB_MAIN);
687 return 0;
688 }
689 EXPORT_SYMBOL_GPL(lbtf_remove_card);
690
lbtf_send_tx_feedback(struct lbtf_private * priv,u8 retrycnt,u8 fail)691 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
692 {
693 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
694
695 ieee80211_tx_info_clear_status(info);
696 /*
697 * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
698 * default pid rc algorithm.
699 *
700 * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
701 */
702 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
703 info->flags |= IEEE80211_TX_STAT_ACK;
704 skb_pull(priv->tx_skb, sizeof(struct txpd));
705 ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
706 priv->tx_skb = NULL;
707 if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
708 ieee80211_wake_queues(priv->hw);
709 else
710 queue_work(lbtf_wq, &priv->tx_work);
711 }
712 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
713
lbtf_bcn_sent(struct lbtf_private * priv)714 void lbtf_bcn_sent(struct lbtf_private *priv)
715 {
716 struct sk_buff *skb = NULL;
717
718 if (priv->vif->type != NL80211_IFTYPE_AP)
719 return;
720
721 if (skb_queue_empty(&priv->bc_ps_buf)) {
722 bool tx_buff_bc = false;
723
724 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
725 skb_queue_tail(&priv->bc_ps_buf, skb);
726 tx_buff_bc = true;
727 }
728 if (tx_buff_bc) {
729 ieee80211_stop_queues(priv->hw);
730 queue_work(lbtf_wq, &priv->tx_work);
731 }
732 }
733
734 skb = ieee80211_beacon_get(priv->hw, priv->vif);
735
736 if (skb) {
737 lbtf_beacon_set(priv, skb);
738 kfree_skb(skb);
739 }
740 }
741 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
742
lbtf_init_module(void)743 static int __init lbtf_init_module(void)
744 {
745 lbtf_deb_enter(LBTF_DEB_MAIN);
746 lbtf_wq = create_workqueue("libertastf");
747 if (lbtf_wq == NULL) {
748 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
749 return -ENOMEM;
750 }
751 lbtf_deb_leave(LBTF_DEB_MAIN);
752 return 0;
753 }
754
lbtf_exit_module(void)755 static void __exit lbtf_exit_module(void)
756 {
757 lbtf_deb_enter(LBTF_DEB_MAIN);
758 destroy_workqueue(lbtf_wq);
759 lbtf_deb_leave(LBTF_DEB_MAIN);
760 }
761
762 module_init(lbtf_init_module);
763 module_exit(lbtf_exit_module);
764
765 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
766 MODULE_AUTHOR("Cozybit Inc.");
767 MODULE_LICENSE("GPL");
768