1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Copyright (C) 2008, cozybit Inc.
4  *  Copyright (C) 2003-2006, Marvell International Ltd.
5  */
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 
8 #include <linux/hardirq.h>
9 #include <linux/slab.h>
10 
11 #include <linux/etherdevice.h>
12 #include <linux/module.h>
13 #include "libertas_tf.h"
14 
15 /* thinfirm version: 5.132.X.pX */
16 #define LBTF_FW_VER_MIN		0x05840300
17 #define LBTF_FW_VER_MAX		0x0584ffff
18 
19 /* Module parameters */
20 unsigned int lbtf_debug;
21 EXPORT_SYMBOL_GPL(lbtf_debug);
22 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
23 
24 struct workqueue_struct *lbtf_wq;
25 
26 static const struct ieee80211_channel lbtf_channels[] = {
27 	{ .center_freq = 2412, .hw_value = 1 },
28 	{ .center_freq = 2417, .hw_value = 2 },
29 	{ .center_freq = 2422, .hw_value = 3 },
30 	{ .center_freq = 2427, .hw_value = 4 },
31 	{ .center_freq = 2432, .hw_value = 5 },
32 	{ .center_freq = 2437, .hw_value = 6 },
33 	{ .center_freq = 2442, .hw_value = 7 },
34 	{ .center_freq = 2447, .hw_value = 8 },
35 	{ .center_freq = 2452, .hw_value = 9 },
36 	{ .center_freq = 2457, .hw_value = 10 },
37 	{ .center_freq = 2462, .hw_value = 11 },
38 	{ .center_freq = 2467, .hw_value = 12 },
39 	{ .center_freq = 2472, .hw_value = 13 },
40 	{ .center_freq = 2484, .hw_value = 14 },
41 };
42 
43 /* This table contains the hardware specific values for the modulation rates. */
44 static const struct ieee80211_rate lbtf_rates[] = {
45 	{ .bitrate = 10,
46 	  .hw_value = 0, },
47 	{ .bitrate = 20,
48 	  .hw_value = 1,
49 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
50 	{ .bitrate = 55,
51 	  .hw_value = 2,
52 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
53 	{ .bitrate = 110,
54 	  .hw_value = 3,
55 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
56 	{ .bitrate = 60,
57 	  .hw_value = 5,
58 	  .flags = 0 },
59 	{ .bitrate = 90,
60 	  .hw_value = 6,
61 	  .flags = 0 },
62 	{ .bitrate = 120,
63 	  .hw_value = 7,
64 	  .flags = 0 },
65 	{ .bitrate = 180,
66 	  .hw_value = 8,
67 	  .flags = 0 },
68 	{ .bitrate = 240,
69 	  .hw_value = 9,
70 	  .flags = 0 },
71 	{ .bitrate = 360,
72 	  .hw_value = 10,
73 	  .flags = 0 },
74 	{ .bitrate = 480,
75 	  .hw_value = 11,
76 	  .flags = 0 },
77 	{ .bitrate = 540,
78 	  .hw_value = 12,
79 	  .flags = 0 },
80 };
81 
lbtf_cmd_work(struct work_struct * work)82 static void lbtf_cmd_work(struct work_struct *work)
83 {
84 	struct lbtf_private *priv = container_of(work, struct lbtf_private,
85 					 cmd_work);
86 
87 	lbtf_deb_enter(LBTF_DEB_CMD);
88 
89 	spin_lock_irq(&priv->driver_lock);
90 	/* command response? */
91 	if (priv->cmd_response_rxed) {
92 		priv->cmd_response_rxed = 0;
93 		spin_unlock_irq(&priv->driver_lock);
94 		lbtf_process_rx_command(priv);
95 		spin_lock_irq(&priv->driver_lock);
96 	}
97 
98 	if (priv->cmd_timed_out && priv->cur_cmd) {
99 		struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
100 
101 		if (++priv->nr_retries > 10) {
102 			lbtf_complete_command(priv, cmdnode,
103 					      -ETIMEDOUT);
104 			priv->nr_retries = 0;
105 		} else {
106 			priv->cur_cmd = NULL;
107 
108 			/* Stick it back at the _top_ of the pending
109 			 * queue for immediate resubmission */
110 			list_add(&cmdnode->list, &priv->cmdpendingq);
111 		}
112 	}
113 	priv->cmd_timed_out = 0;
114 	spin_unlock_irq(&priv->driver_lock);
115 
116 	/* Execute the next command */
117 	if (!priv->cur_cmd)
118 		lbtf_execute_next_command(priv);
119 
120 	lbtf_deb_leave(LBTF_DEB_CMD);
121 }
122 
123 /*
124  *  This function handles the timeout of command sending.
125  *  It will re-send the same command again.
126  */
command_timer_fn(struct timer_list * t)127 static void command_timer_fn(struct timer_list *t)
128 {
129 	struct lbtf_private *priv = from_timer(priv, t, command_timer);
130 	unsigned long flags;
131 	lbtf_deb_enter(LBTF_DEB_CMD);
132 
133 	spin_lock_irqsave(&priv->driver_lock, flags);
134 
135 	if (!priv->cur_cmd) {
136 		printk(KERN_DEBUG "libertastf: command timer expired; "
137 				  "no pending command\n");
138 		goto out;
139 	}
140 
141 	printk(KERN_DEBUG "libertas: command %x timed out\n",
142 		le16_to_cpu(priv->cur_cmd->cmdbuf->command));
143 
144 	priv->cmd_timed_out = 1;
145 	queue_work(lbtf_wq, &priv->cmd_work);
146 out:
147 	spin_unlock_irqrestore(&priv->driver_lock, flags);
148 	lbtf_deb_leave(LBTF_DEB_CMD);
149 }
150 
lbtf_init_adapter(struct lbtf_private * priv)151 static int lbtf_init_adapter(struct lbtf_private *priv)
152 {
153 	lbtf_deb_enter(LBTF_DEB_MAIN);
154 	eth_broadcast_addr(priv->current_addr);
155 	mutex_init(&priv->lock);
156 
157 	priv->vif = NULL;
158 	timer_setup(&priv->command_timer, command_timer_fn, 0);
159 
160 	INIT_LIST_HEAD(&priv->cmdfreeq);
161 	INIT_LIST_HEAD(&priv->cmdpendingq);
162 
163 	spin_lock_init(&priv->driver_lock);
164 
165 	/* Allocate the command buffers */
166 	if (lbtf_allocate_cmd_buffer(priv))
167 		return -1;
168 
169 	lbtf_deb_leave(LBTF_DEB_MAIN);
170 	return 0;
171 }
172 
lbtf_free_adapter(struct lbtf_private * priv)173 static void lbtf_free_adapter(struct lbtf_private *priv)
174 {
175 	lbtf_deb_enter(LBTF_DEB_MAIN);
176 	lbtf_free_cmd_buffer(priv);
177 	del_timer(&priv->command_timer);
178 	lbtf_deb_leave(LBTF_DEB_MAIN);
179 }
180 
lbtf_op_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)181 static void lbtf_op_tx(struct ieee80211_hw *hw,
182 		       struct ieee80211_tx_control *control,
183 		       struct sk_buff *skb)
184 {
185 	struct lbtf_private *priv = hw->priv;
186 
187 	priv->skb_to_tx = skb;
188 	queue_work(lbtf_wq, &priv->tx_work);
189 	/*
190 	 * queue will be restarted when we receive transmission feedback if
191 	 * there are no buffered multicast frames to send
192 	 */
193 	ieee80211_stop_queues(priv->hw);
194 }
195 
lbtf_tx_work(struct work_struct * work)196 static void lbtf_tx_work(struct work_struct *work)
197 {
198 	struct lbtf_private *priv = container_of(work, struct lbtf_private,
199 					 tx_work);
200 	unsigned int len;
201 	struct ieee80211_tx_info *info;
202 	struct txpd *txpd;
203 	struct sk_buff *skb = NULL;
204 	int err;
205 
206 	lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
207 
208 	if ((priv->vif->type == NL80211_IFTYPE_AP) &&
209 	    (!skb_queue_empty(&priv->bc_ps_buf)))
210 		skb = skb_dequeue(&priv->bc_ps_buf);
211 	else if (priv->skb_to_tx) {
212 		skb = priv->skb_to_tx;
213 		priv->skb_to_tx = NULL;
214 	} else {
215 		lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
216 		return;
217 	}
218 
219 	len = skb->len;
220 	info  = IEEE80211_SKB_CB(skb);
221 	txpd = skb_push(skb, sizeof(struct txpd));
222 
223 	if (priv->surpriseremoved) {
224 		dev_kfree_skb_any(skb);
225 		lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
226 		return;
227 	}
228 
229 	memset(txpd, 0, sizeof(struct txpd));
230 	/* Activate per-packet rate selection */
231 	txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
232 			     ieee80211_get_tx_rate(priv->hw, info)->hw_value);
233 
234 	/* copy destination address from 802.11 header */
235 	BUILD_BUG_ON(sizeof(txpd->tx_dest_addr) != ETH_ALEN);
236 	memcpy(&txpd->tx_dest_addr, skb->data + sizeof(struct txpd) + 4,
237 		ETH_ALEN);
238 	txpd->tx_packet_length = cpu_to_le16(len);
239 	txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
240 	lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
241 	BUG_ON(priv->tx_skb);
242 	spin_lock_irq(&priv->driver_lock);
243 	priv->tx_skb = skb;
244 	err = priv->ops->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
245 	spin_unlock_irq(&priv->driver_lock);
246 	if (err) {
247 		dev_kfree_skb_any(skb);
248 		priv->tx_skb = NULL;
249 		pr_err("TX error: %d", err);
250 	}
251 	lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
252 }
253 
lbtf_op_start(struct ieee80211_hw * hw)254 static int lbtf_op_start(struct ieee80211_hw *hw)
255 {
256 	struct lbtf_private *priv = hw->priv;
257 
258 	lbtf_deb_enter(LBTF_DEB_MACOPS);
259 
260 	priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
261 	priv->radioon = RADIO_ON;
262 	priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
263 	lbtf_set_mac_control(priv);
264 	lbtf_set_radio_control(priv);
265 
266 	lbtf_deb_leave(LBTF_DEB_MACOPS);
267 	return 0;
268 }
269 
lbtf_op_stop(struct ieee80211_hw * hw)270 static void lbtf_op_stop(struct ieee80211_hw *hw)
271 {
272 	struct lbtf_private *priv = hw->priv;
273 	unsigned long flags;
274 	struct sk_buff *skb;
275 
276 	struct cmd_ctrl_node *cmdnode;
277 
278 	lbtf_deb_enter(LBTF_DEB_MACOPS);
279 
280 	/* Flush pending command nodes */
281 	spin_lock_irqsave(&priv->driver_lock, flags);
282 	list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
283 		cmdnode->result = -ENOENT;
284 		cmdnode->cmdwaitqwoken = 1;
285 		wake_up_interruptible(&cmdnode->cmdwait_q);
286 	}
287 
288 	spin_unlock_irqrestore(&priv->driver_lock, flags);
289 	cancel_work_sync(&priv->cmd_work);
290 	cancel_work_sync(&priv->tx_work);
291 	while ((skb = skb_dequeue(&priv->bc_ps_buf)))
292 		dev_kfree_skb_any(skb);
293 	priv->radioon = RADIO_OFF;
294 	lbtf_set_radio_control(priv);
295 
296 	lbtf_deb_leave(LBTF_DEB_MACOPS);
297 }
298 
lbtf_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)299 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
300 			struct ieee80211_vif *vif)
301 {
302 	struct lbtf_private *priv = hw->priv;
303 	lbtf_deb_enter(LBTF_DEB_MACOPS);
304 	if (priv->vif != NULL)
305 		return -EOPNOTSUPP;
306 
307 	priv->vif = vif;
308 	switch (vif->type) {
309 	case NL80211_IFTYPE_MESH_POINT:
310 	case NL80211_IFTYPE_AP:
311 		lbtf_set_mode(priv, LBTF_AP_MODE);
312 		break;
313 	case NL80211_IFTYPE_STATION:
314 		lbtf_set_mode(priv, LBTF_STA_MODE);
315 		break;
316 	default:
317 		priv->vif = NULL;
318 		return -EOPNOTSUPP;
319 	}
320 	lbtf_set_mac_address(priv, (u8 *) vif->addr);
321 	lbtf_deb_leave(LBTF_DEB_MACOPS);
322 	return 0;
323 }
324 
lbtf_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)325 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
326 			struct ieee80211_vif *vif)
327 {
328 	struct lbtf_private *priv = hw->priv;
329 	lbtf_deb_enter(LBTF_DEB_MACOPS);
330 
331 	if (priv->vif->type == NL80211_IFTYPE_AP ||
332 	    priv->vif->type == NL80211_IFTYPE_MESH_POINT)
333 		lbtf_beacon_ctrl(priv, 0, 0);
334 	lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
335 	lbtf_set_bssid(priv, 0, NULL);
336 	priv->vif = NULL;
337 	lbtf_deb_leave(LBTF_DEB_MACOPS);
338 }
339 
lbtf_op_config(struct ieee80211_hw * hw,u32 changed)340 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
341 {
342 	struct lbtf_private *priv = hw->priv;
343 	struct ieee80211_conf *conf = &hw->conf;
344 	lbtf_deb_enter(LBTF_DEB_MACOPS);
345 
346 	if (conf->chandef.chan->center_freq != priv->cur_freq) {
347 		priv->cur_freq = conf->chandef.chan->center_freq;
348 		lbtf_set_channel(priv, conf->chandef.chan->hw_value);
349 	}
350 	lbtf_deb_leave(LBTF_DEB_MACOPS);
351 	return 0;
352 }
353 
lbtf_op_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)354 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
355 				     struct netdev_hw_addr_list *mc_list)
356 {
357 	struct lbtf_private *priv = hw->priv;
358 	int i;
359 	struct netdev_hw_addr *ha;
360 	int mc_count = netdev_hw_addr_list_count(mc_list);
361 
362 	if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
363 		return mc_count;
364 
365 	priv->nr_of_multicastmacaddr = mc_count;
366 	i = 0;
367 	netdev_hw_addr_list_for_each(ha, mc_list)
368 		memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
369 
370 	return mc_count;
371 }
372 
373 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
lbtf_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * new_flags,u64 multicast)374 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
375 			unsigned int changed_flags,
376 			unsigned int *new_flags,
377 			u64 multicast)
378 {
379 	struct lbtf_private *priv = hw->priv;
380 	int old_mac_control = priv->mac_control;
381 
382 	lbtf_deb_enter(LBTF_DEB_MACOPS);
383 
384 	changed_flags &= SUPPORTED_FIF_FLAGS;
385 	*new_flags &= SUPPORTED_FIF_FLAGS;
386 
387 	if (!changed_flags) {
388 		lbtf_deb_leave(LBTF_DEB_MACOPS);
389 		return;
390 	}
391 
392 	priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
393 	if (*new_flags & (FIF_ALLMULTI) ||
394 	    multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
395 		priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
396 		priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
397 	} else if (multicast) {
398 		priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
399 		priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
400 		lbtf_cmd_set_mac_multicast_addr(priv);
401 	} else {
402 		priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
403 				       CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
404 		if (priv->nr_of_multicastmacaddr) {
405 			priv->nr_of_multicastmacaddr = 0;
406 			lbtf_cmd_set_mac_multicast_addr(priv);
407 		}
408 	}
409 
410 
411 	if (priv->mac_control != old_mac_control)
412 		lbtf_set_mac_control(priv);
413 
414 	lbtf_deb_leave(LBTF_DEB_MACOPS);
415 }
416 
lbtf_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changes)417 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
418 			struct ieee80211_vif *vif,
419 			struct ieee80211_bss_conf *bss_conf,
420 			u64 changes)
421 {
422 	struct lbtf_private *priv = hw->priv;
423 	struct sk_buff *beacon;
424 	lbtf_deb_enter(LBTF_DEB_MACOPS);
425 
426 	if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
427 		switch (priv->vif->type) {
428 		case NL80211_IFTYPE_AP:
429 		case NL80211_IFTYPE_MESH_POINT:
430 			beacon = ieee80211_beacon_get(hw, vif, 0);
431 			if (beacon) {
432 				lbtf_beacon_set(priv, beacon);
433 				kfree_skb(beacon);
434 				lbtf_beacon_ctrl(priv, 1,
435 						 bss_conf->beacon_int);
436 			}
437 			break;
438 		default:
439 			break;
440 		}
441 	}
442 
443 	if (changes & BSS_CHANGED_BSSID) {
444 		bool activate = !is_zero_ether_addr(bss_conf->bssid);
445 		lbtf_set_bssid(priv, activate, bss_conf->bssid);
446 	}
447 
448 	if (changes & BSS_CHANGED_ERP_PREAMBLE) {
449 		if (bss_conf->use_short_preamble)
450 			priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
451 		else
452 			priv->preamble = CMD_TYPE_LONG_PREAMBLE;
453 		lbtf_set_radio_control(priv);
454 	}
455 
456 	lbtf_deb_leave(LBTF_DEB_MACOPS);
457 }
458 
lbtf_op_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)459 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
460 				struct survey_info *survey)
461 {
462 	struct lbtf_private *priv = hw->priv;
463 	struct ieee80211_conf *conf = &hw->conf;
464 
465 	if (idx != 0)
466 		return -ENOENT;
467 
468 	survey->channel = conf->chandef.chan;
469 	survey->filled = SURVEY_INFO_NOISE_DBM;
470 	survey->noise = priv->noise;
471 
472 	return 0;
473 }
474 
475 static const struct ieee80211_ops lbtf_ops = {
476 	.tx			= lbtf_op_tx,
477 	.start			= lbtf_op_start,
478 	.stop			= lbtf_op_stop,
479 	.add_interface		= lbtf_op_add_interface,
480 	.remove_interface	= lbtf_op_remove_interface,
481 	.config			= lbtf_op_config,
482 	.prepare_multicast	= lbtf_op_prepare_multicast,
483 	.configure_filter	= lbtf_op_configure_filter,
484 	.bss_info_changed	= lbtf_op_bss_info_changed,
485 	.get_survey		= lbtf_op_get_survey,
486 };
487 
lbtf_rx(struct lbtf_private * priv,struct sk_buff * skb)488 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
489 {
490 	struct ieee80211_rx_status stats;
491 	struct rxpd *prxpd;
492 	int need_padding;
493 	struct ieee80211_hdr *hdr;
494 
495 	lbtf_deb_enter(LBTF_DEB_RX);
496 
497 	if (priv->radioon != RADIO_ON) {
498 		lbtf_deb_rx("rx before we turned on the radio");
499 		goto done;
500 	}
501 
502 	prxpd = (struct rxpd *) skb->data;
503 
504 	memset(&stats, 0, sizeof(stats));
505 	if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
506 		stats.flag |= RX_FLAG_FAILED_FCS_CRC;
507 	stats.freq = priv->cur_freq;
508 	stats.band = NL80211_BAND_2GHZ;
509 	stats.signal = prxpd->snr - prxpd->nf;
510 	priv->noise = prxpd->nf;
511 	/* Marvell rate index has a hole at value 4 */
512 	if (prxpd->rx_rate > 4)
513 		--prxpd->rx_rate;
514 	stats.rate_idx = prxpd->rx_rate;
515 	skb_pull(skb, sizeof(struct rxpd));
516 
517 	hdr = (struct ieee80211_hdr *)skb->data;
518 
519 	need_padding = ieee80211_is_data_qos(hdr->frame_control);
520 	need_padding ^= ieee80211_has_a4(hdr->frame_control);
521 	need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
522 			(*ieee80211_get_qos_ctl(hdr) &
523 			 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
524 
525 	if (need_padding) {
526 		memmove(skb->data + 2, skb->data, skb->len);
527 		skb_reserve(skb, 2);
528 	}
529 
530 	memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
531 
532 	lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
533 	       skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
534 	lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
535 	             min_t(unsigned int, skb->len, 100));
536 
537 	ieee80211_rx_irqsafe(priv->hw, skb);
538 
539 done:
540 	lbtf_deb_leave(LBTF_DEB_RX);
541 	return 0;
542 }
543 EXPORT_SYMBOL_GPL(lbtf_rx);
544 
545 /*
546  * lbtf_add_card: Add and initialize the card.
547  *
548  *  Returns: pointer to struct lbtf_priv.
549  */
lbtf_add_card(void * card,struct device * dmdev,const struct lbtf_ops * ops)550 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
551 				   const struct lbtf_ops *ops)
552 {
553 	struct ieee80211_hw *hw;
554 	struct lbtf_private *priv = NULL;
555 
556 	lbtf_deb_enter(LBTF_DEB_MAIN);
557 
558 	hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
559 	if (!hw)
560 		goto done;
561 
562 	priv = hw->priv;
563 	if (lbtf_init_adapter(priv))
564 		goto err_init_adapter;
565 
566 	priv->hw = hw;
567 	priv->card = card;
568 	priv->ops = ops;
569 	priv->tx_skb = NULL;
570 	priv->radioon = RADIO_OFF;
571 
572 	hw->queues = 1;
573 	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
574 	ieee80211_hw_set(hw, SIGNAL_DBM);
575 	hw->extra_tx_headroom = sizeof(struct txpd);
576 	memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
577 	memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
578 	priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
579 	priv->band.bitrates = priv->rates;
580 	priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
581 	priv->band.channels = priv->channels;
582 	hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
583 	hw->wiphy->interface_modes =
584 		BIT(NL80211_IFTYPE_STATION) |
585 		BIT(NL80211_IFTYPE_ADHOC);
586 	skb_queue_head_init(&priv->bc_ps_buf);
587 
588 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
589 
590 	SET_IEEE80211_DEV(hw, dmdev);
591 
592 	INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
593 	INIT_WORK(&priv->tx_work, lbtf_tx_work);
594 
595 	if (priv->ops->hw_prog_firmware(priv)) {
596 		lbtf_deb_usbd(dmdev, "Error programming the firmware\n");
597 		priv->ops->hw_reset_device(priv);
598 		goto err_init_adapter;
599 	}
600 
601 	eth_broadcast_addr(priv->current_addr);
602 	if (lbtf_update_hw_spec(priv))
603 		goto err_init_adapter;
604 
605 	if (priv->fwrelease < LBTF_FW_VER_MIN ||
606 	    priv->fwrelease > LBTF_FW_VER_MAX) {
607 		goto err_init_adapter;
608 	}
609 
610 	/* The firmware seems to start with the radio enabled. Turn it
611 	 * off before an actual mac80211 start callback is invoked.
612 	 */
613 	lbtf_set_radio_control(priv);
614 
615 	if (ieee80211_register_hw(hw))
616 		goto err_init_adapter;
617 
618 	dev_info(dmdev, "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
619 	goto done;
620 
621 err_init_adapter:
622 	lbtf_free_adapter(priv);
623 	ieee80211_free_hw(hw);
624 	priv = NULL;
625 
626 done:
627 	lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
628 	return priv;
629 }
630 EXPORT_SYMBOL_GPL(lbtf_add_card);
631 
632 
lbtf_remove_card(struct lbtf_private * priv)633 int lbtf_remove_card(struct lbtf_private *priv)
634 {
635 	struct ieee80211_hw *hw = priv->hw;
636 
637 	lbtf_deb_enter(LBTF_DEB_MAIN);
638 
639 	priv->surpriseremoved = 1;
640 	del_timer(&priv->command_timer);
641 	lbtf_free_adapter(priv);
642 	priv->hw = NULL;
643 	ieee80211_unregister_hw(hw);
644 	ieee80211_free_hw(hw);
645 
646 	lbtf_deb_leave(LBTF_DEB_MAIN);
647 	return 0;
648 }
649 EXPORT_SYMBOL_GPL(lbtf_remove_card);
650 
lbtf_send_tx_feedback(struct lbtf_private * priv,u8 retrycnt,u8 fail)651 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
652 {
653 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
654 
655 	ieee80211_tx_info_clear_status(info);
656 	/*
657 	 * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
658 	 * default pid rc algorithm.
659 	 *
660 	 * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
661 	 */
662 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
663 		info->flags |= IEEE80211_TX_STAT_ACK;
664 	skb_pull(priv->tx_skb, sizeof(struct txpd));
665 	ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
666 	priv->tx_skb = NULL;
667 	if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
668 		ieee80211_wake_queues(priv->hw);
669 	else
670 		queue_work(lbtf_wq, &priv->tx_work);
671 }
672 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
673 
lbtf_bcn_sent(struct lbtf_private * priv)674 void lbtf_bcn_sent(struct lbtf_private *priv)
675 {
676 	struct sk_buff *skb = NULL;
677 
678 	if (priv->vif->type != NL80211_IFTYPE_AP)
679 		return;
680 
681 	if (skb_queue_empty(&priv->bc_ps_buf)) {
682 		bool tx_buff_bc = false;
683 
684 		while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
685 			skb_queue_tail(&priv->bc_ps_buf, skb);
686 			tx_buff_bc = true;
687 		}
688 		if (tx_buff_bc) {
689 			ieee80211_stop_queues(priv->hw);
690 			queue_work(lbtf_wq, &priv->tx_work);
691 		}
692 	}
693 
694 	skb = ieee80211_beacon_get(priv->hw, priv->vif, 0);
695 
696 	if (skb) {
697 		lbtf_beacon_set(priv, skb);
698 		kfree_skb(skb);
699 	}
700 }
701 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
702 
lbtf_init_module(void)703 static int __init lbtf_init_module(void)
704 {
705 	lbtf_deb_enter(LBTF_DEB_MAIN);
706 	lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
707 	if (lbtf_wq == NULL) {
708 		printk(KERN_ERR "libertastf: couldn't create workqueue\n");
709 		return -ENOMEM;
710 	}
711 	lbtf_deb_leave(LBTF_DEB_MAIN);
712 	return 0;
713 }
714 
lbtf_exit_module(void)715 static void __exit lbtf_exit_module(void)
716 {
717 	lbtf_deb_enter(LBTF_DEB_MAIN);
718 	destroy_workqueue(lbtf_wq);
719 	lbtf_deb_leave(LBTF_DEB_MAIN);
720 }
721 
722 module_init(lbtf_init_module);
723 module_exit(lbtf_exit_module);
724 
725 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
726 MODULE_AUTHOR("Cozybit Inc.");
727 MODULE_LICENSE("GPL");
728