aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/libertas_tf/cmd.c
blob: b620daf59ef7fa3927c3e323779d70d3ec4e49bd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
/*
 *  Copyright (C) 2008, cozybit Inc.
 *  Copyright (C) 2003-2006, Marvell International Ltd.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 */
#include <linux/slab.h>

#include "libertas_tf.h"

static const struct channel_range channel_ranges[] = {
	{ LBTF_REGDOMAIN_US,		1, 12 },
	{ LBTF_REGDOMAIN_CA,		1, 12 },
	{ LBTF_REGDOMAIN_EU,		1, 14 },
	{ LBTF_REGDOMAIN_JP,		1, 14 },
	{ LBTF_REGDOMAIN_SP,		1, 14 },
	{ LBTF_REGDOMAIN_FR,		1, 14 },
};

static u16 lbtf_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
{
	LBTF_REGDOMAIN_US, LBTF_REGDOMAIN_CA, LBTF_REGDOMAIN_EU,
	LBTF_REGDOMAIN_SP, LBTF_REGDOMAIN_FR, LBTF_REGDOMAIN_JP,
};

static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv);


/**
 *  lbtf_cmd_copyback - Simple callback that copies response back into command
 *
 *  @priv	A pointer to struct lbtf_private structure
 *  @extra	A pointer to the original command structure for which
 *		'resp' is a response
 *  @resp	A pointer to the command response
 *
 *  Returns: 0 on success, error on failure
 */
int lbtf_cmd_copyback(struct lbtf_private *priv, unsigned long extra,
		     struct cmd_header *resp)
{
	struct cmd_header *buf = (void *)extra;
	uint16_t copy_len;

	copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
	memcpy(buf, resp, copy_len);
	return 0;
}
EXPORT_SYMBOL_GPL(lbtf_cmd_copyback);

#define CHAN_TO_IDX(chan) ((chan) - 1)

static void lbtf_geo_init(struct lbtf_private *priv)
{
	const struct channel_range *range = channel_ranges;
	u8 ch;
	int i;

	for (i = 0; i < ARRAY_SIZE(channel_ranges); i++)
		if (channel_ranges[i].regdomain == priv->regioncode) {
			range = &channel_ranges[i];
			break;
		}

	for (ch = priv->range.start; ch < priv->range.end; ch++)
		priv->channels[CHAN_TO_IDX(ch)].flags = 0;
}

/**
 *  lbtf_update_hw_spec: Updates the hardware details.
 *
 *  @priv    	A pointer to struct lbtf_private structure
 *
 *  Returns: 0 on success, error on failure
 */
int lbtf_update_hw_spec(struct lbtf_private *priv)
{
	struct cmd_ds_get_hw_spec cmd;
	int ret = -1;
	u32 i;

	memset(&cmd, 0, sizeof(cmd));
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
	ret = lbtf_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
	if (ret)
		goto out;

	priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);

	/* The firmware release is in an interesting format: the patch
	 * level is in the most significant nibble ... so fix that: */
	priv->fwrelease = le32_to_cpu(cmd.fwrelease);
	priv->fwrelease = (priv->fwrelease << 8) |
		(priv->fwrelease >> 24 & 0xff);

	printk(KERN_INFO "libertastf: %pM, fw %u.%u.%up%u, cap 0x%08x\n",
		cmd.permanentaddr,
		priv->fwrelease >> 24 & 0xff,
		priv->fwrelease >> 16 & 0xff,
		priv->fwrelease >>  8 & 0xff,
		priv->fwrelease       & 0xff,
		priv->fwcapinfo);

	/* Clamp region code to 8-bit since FW spec indicates that it should
	 * only ever be 8-bit, even though the field size is 16-bit.  Some
	 * firmware returns non-zero high 8 bits here.
	 */
	priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;

	for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
		/* use the region code to search for the index */
		if (priv->regioncode == lbtf_region_code_to_index[i])
			break;
	}

	/* if it's unidentified region code, use the default (USA) */
	if (i >= MRVDRV_MAX_REGION_CODE)
		priv->regioncode = 0x10;

	if (priv->current_addr[0] == 0xff)
		memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);

	SET_IEEE80211_PERM_ADDR(priv->hw, priv->current_addr);

	lbtf_geo_init(priv);
out:
	return ret;
}

/**
 *  lbtf_set_channel: Set the radio channel
 *
 *  @priv	A pointer to struct lbtf_private structure
 *  @channel	The desired channel, or 0 to clear a locked channel
 *
 *  Returns: 0 on success, error on failure
 */
int lbtf_set_channel(struct lbtf_private *priv, u8 channel)
{
	struct cmd_ds_802_11_rf_channel cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
	cmd.channel = cpu_to_le16(channel);

	return lbtf_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
}

int lbtf_beacon_set(struct lbtf_private *priv, struct sk_buff *beacon)
{
	struct cmd_ds_802_11_beacon_set cmd;
	int size;

	if (beacon->len > MRVL_MAX_BCN_SIZE)
		return -1;
	size =  sizeof(cmd) - sizeof(cmd.beacon) + beacon->len;
	cmd.hdr.size = cpu_to_le16(size);
	cmd.len = cpu_to_le16(beacon->len);
	memcpy(cmd.beacon, (u8 *) beacon->data, beacon->len);

	lbtf_cmd_async(priv, CMD_802_11_BEACON_SET, &cmd.hdr, size);
	return 0;
}

int lbtf_beacon_ctrl(struct lbtf_private *priv, bool beacon_enable,
		     int beacon_int) {
	struct cmd_ds_802_11_beacon_control cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	cmd.beacon_enable = cpu_to_le16(beacon_enable);
	cmd.beacon_period = cpu_to_le16(beacon_int);

	lbtf_cmd_async(priv, CMD_802_11_BEACON_CTRL, &cmd.hdr, sizeof(cmd));
	return 0;
}

static void lbtf_queue_cmd(struct lbtf_private *priv,
			  struct cmd_ctrl_node *cmdnode)
{
	unsigned long flags;

	if (!cmdnode)
		return;

	if (!cmdnode->cmdbuf->size)
		return;

	cmdnode->result = 0;
	spin_lock_irqsave(&priv->driver_lock, flags);
	list_add_tail(&cmdnode->list, &priv->cmdpendingq);
	spin_unlock_irqrestore(&priv->driver_lock, flags);
}

static void lbtf_submit_command(struct lbtf_private *priv,
			       struct cmd_ctrl_node *cmdnode)
{
	unsigned long flags;
	struct cmd_header *cmd;
	uint16_t cmdsize;
	uint16_t command;
	int timeo = 5 * HZ;
	int ret;

	cmd = cmdnode->cmdbuf;

	spin_lock_irqsave(&priv->driver_lock, flags);
	priv->cur_cmd = cmdnode;
	cmdsize = le16_to_cpu(cmd->size);
	command = le16_to_cpu(cmd->command);
	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	if (ret)
		/* Let the timer kick in and retry, and potentially reset
		   the whole thing if the condition persists */
		timeo = HZ;

	/* Setup the timer after transmit command */
	mod_timer(&priv->command_timer, jiffies + timeo);
}

/**
 *  This function inserts command node to cmdfreeq
 *  after cleans it. Requires priv->driver_lock held.
 */
static void __lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
					 struct cmd_ctrl_node *cmdnode)
{
	if (!cmdnode)
		return;

	cmdnode->callback = NULL;
	cmdnode->callback_arg = 0;

	memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);

	list_add_tail(&cmdnode->list, &priv->cmdfreeq);
}

static void lbtf_cleanup_and_insert_cmd(struct lbtf_private *priv,
	struct cmd_ctrl_node *ptempcmd)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->driver_lock, flags);
	__lbtf_cleanup_and_insert_cmd(priv, ptempcmd);
	spin_unlock_irqrestore(&priv->driver_lock, flags);
}

void lbtf_complete_command(struct lbtf_private *priv, struct cmd_ctrl_node *cmd,
			  int result)
{
	cmd->result = result;
	cmd->cmdwaitqwoken = 1;
	wake_up_interruptible(&cmd->cmdwait_q);

	if (!cmd->callback)
		__lbtf_cleanup_and_insert_cmd(priv, cmd);
	priv->cur_cmd = NULL;
}

int lbtf_cmd_set_mac_multicast_addr(struct lbtf_private *priv)
{
	struct cmd_ds_mac_multicast_addr cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	cmd.nr_of_adrs = cpu_to_le16((u16) priv->nr_of_multicastmacaddr);
	memcpy(cmd.maclist, priv->multicastlist,
	       priv->nr_of_multicastmacaddr * ETH_ALEN);

	lbtf_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &cmd.hdr, sizeof(cmd));
	return 0;
}

void lbtf_set_mode(struct lbtf_private *priv, enum lbtf_mode mode)
{
	struct cmd_ds_set_mode cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.mode = cpu_to_le16(mode);
	lbtf_cmd_async(priv, CMD_802_11_SET_MODE, &cmd.hdr, sizeof(cmd));
}

void lbtf_set_bssid(struct lbtf_private *priv, bool activate, const u8 *bssid)
{
	struct cmd_ds_set_bssid cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.activate = activate ? 1 : 0;
	if (activate)
		memcpy(cmd.bssid, bssid, ETH_ALEN);

	lbtf_cmd_async(priv, CMD_802_11_SET_BSSID, &cmd.hdr, sizeof(cmd));
}

int lbtf_set_mac_address(struct lbtf_private *priv, uint8_t *mac_addr)
{
	struct cmd_ds_802_11_mac_address cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	memcpy(cmd.macadd, mac_addr, ETH_ALEN);

	lbtf_cmd_async(priv, CMD_802_11_MAC_ADDRESS, &cmd.hdr, sizeof(cmd));
	return 0;
}

int lbtf_set_radio_control(struct lbtf_private *priv)
{
	int ret = 0;
	struct cmd_ds_802_11_radio_control cmd;

	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);

	switch (priv->preamble) {
	case CMD_TYPE_SHORT_PREAMBLE:
		cmd.control = cpu_to_le16(SET_SHORT_PREAMBLE);
		break;

	case CMD_TYPE_LONG_PREAMBLE:
		cmd.control = cpu_to_le16(SET_LONG_PREAMBLE);
		break;

	case CMD_TYPE_AUTO_PREAMBLE:
	default:
		cmd.control = cpu_to_le16(SET_AUTO_PREAMBLE);
		break;
	}

	if (priv->radioon)
		cmd.control |= cpu_to_le16(TURN_ON_RF);
	else
		cmd.control &= cpu_to_le16(~TURN_ON_RF);

	ret = lbtf_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
	return ret;
}

void lbtf_set_mac_control(struct lbtf_private *priv)
{
	struct cmd_ds_mac_control cmd;
	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(priv->mac_control);
	cmd.reserved = 0;

	lbtf_cmd_async(priv, CMD_MAC_CONTROL,
		&cmd.hdr, sizeof(cmd));
}

/**
 *  lbtf_allocate_cmd_buffer - Allocates cmd buffer, links it to free cmd queue
 *
 *  @priv	A pointer to struct lbtf_private structure
 *
 *  Returns: 0 on success.
 */
int lbtf_allocate_cmd_buffer(struct lbtf_private *priv)
{
	u32 bufsize;
	u32 i;
	struct cmd_ctrl_node *cmdarray;

	/* Allocate and initialize the command array */
	bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
	cmdarray = kzalloc(bufsize, GFP_KERNEL);
	if (!cmdarray)
		return -1;
	priv->cmd_array = cmdarray;

	/* Allocate and initialize each command buffer in the command array */
	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
		if (!cmdarray[i].cmdbuf)
			return -1;
	}

	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		init_waitqueue_head(&cmdarray[i].cmdwait_q);
		lbtf_cleanup_and_insert_cmd(priv, &cmdarray[i]);
	}
	return 0;
}

/**
 *  lbtf_free_cmd_buffer - Frees the cmd buffer.
 *
 *  @priv	A pointer to struct lbtf_private structure
 *
 *  Returns: 0
 */
int lbtf_free_cmd_buffer(struct lbtf_private *priv)
{
	struct cmd_ctrl_node *cmdarray;
	unsigned int i;

	/* need to check if cmd array is allocated or not */
	if (priv->cmd_array == NULL)
		return 0;

	cmdarray = priv->cmd_array;

	/* Release shared memory buffers */
	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
		kfree(cmdarray[i].cmdbuf);
		cmdarray[i].cmdbuf = NULL;
	}

	/* Release cmd_ctrl_node */
	kfree(priv->cmd_array);
	priv->cmd_array = NULL;

	return 0;
}

/**
 *  lbtf_get_cmd_ctrl_node - Gets free cmd node from free cmd queue.
 *
 *  @priv		A pointer to struct lbtf_private structure
 *
 *  Returns: pointer to a struct cmd_ctrl_node or NULL if none available.
 */
static struct cmd_ctrl_node *lbtf_get_cmd_ctrl_node(struct lbtf_private *priv)
{
	struct cmd_ctrl_node *tempnode;
	unsigned long flags;

	if (!priv)
		return NULL;

	spin_lock_irqsave(&priv->driver_lock, flags);

	if (!list_empty(&priv->cmdfreeq)) {
		tempnode = list_first_entry(&priv->cmdfreeq,
					    struct cmd_ctrl_node, list);
		list_del(&tempnode->list);
	} else
		tempnode = NULL;

	spin_unlock_irqrestore(&priv->driver_lock, flags);

	return tempnode;
}

/**
 *  lbtf_execute_next_command: execute next command in cmd pending queue.
 *
 *  @priv     A pointer to struct lbtf_private structure
 *
 *  Returns: 0 on success.
 */
int lbtf_execute_next_command(struct lbtf_private *priv)
{
	struct cmd_ctrl_node *cmdnode = NULL;
	struct cmd_header *cmd;
	unsigned long flags;

	/* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
	 * only caller to us is lbtf_thread() and we get even when a
	 * data packet is received */

	spin_lock_irqsave(&priv->driver_lock, flags);

	if (priv->cur_cmd) {
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		return -1;
	}

	if (!list_empty(&priv->cmdpendingq)) {
		cmdnode = list_first_entry(&priv->cmdpendingq,
					   struct cmd_ctrl_node, list);
	}

	if (cmdnode) {
		cmd = cmdnode->cmdbuf;

		list_del(&cmdnode->list);
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		lbtf_submit_command(priv, cmdnode);
	} else
		spin_unlock_irqrestore(&priv->driver_lock, flags);
	return 0;
}

static struct cmd_ctrl_node *__lbtf_cmd_async(struct lbtf_private *priv,
	uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
	int (*callback)(struct lbtf_private *, unsigned long,
			struct cmd_header *),
	unsigned long callback_arg)
{
	struct cmd_ctrl_node *cmdnode;

	if (priv->surpriseremoved)
		return ERR_PTR(-ENOENT);

	cmdnode = lbtf_get_cmd_ctrl_node(priv);
	if (cmdnode == NULL) {
		/* Wake up main thread to execute next command */
		queue_work(lbtf_wq, &priv->cmd_work);
		return ERR_PTR(-ENOBUFS);
	}

	cmdnode->callback = callback;
	cmdnode->callback_arg = callback_arg;

	/* Copy the incoming command to the buffer */
	memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);

	/* Set sequence number, clean result, move to buffer */
	priv->seqnum++;
	cmdnode->cmdbuf->command = cpu_to_le16(command);
	cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
	cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
	cmdnode->cmdbuf->result  = 0;
	cmdnode->cmdwaitqwoken = 0;
	lbtf_queue_cmd(priv, cmdnode);
	queue_work(lbtf_wq, &priv->cmd_work);

	return cmdnode;
}

void lbtf_cmd_async(struct lbtf_private *priv, uint16_t command,
	struct cmd_header *in_cmd, int in_cmd_size)
{
	__lbtf_cmd_async(priv, command, in_cmd, in_cmd_size, NULL, 0);
}

int __lbtf_cmd(struct lbtf_private *priv, uint16_t command,
	      struct cmd_header *in_cmd, int in_cmd_size,
	      int (*callback)(struct lbtf_private *,
			      unsigned long, struct cmd_header *),
	      unsigned long callback_arg)
{
	struct cmd_ctrl_node *cmdnode;
	unsigned long flags;
	int ret = 0;

	cmdnode = __lbtf_cmd_async(priv, command, in_cmd, in_cmd_size,
				  callback, callback_arg);
	if (IS_ERR(cmdnode))
		return PTR_ERR(cmdnode);

	might_sleep();
	ret = wait_event_interruptible(cmdnode->cmdwait_q,
				       cmdnode->cmdwaitqwoken);
       if (ret)	{
		printk(KERN_DEBUG
		       "libertastf: command 0x%04x interrupted by signal",
		       command);
		return ret;
	}

	spin_lock_irqsave(&priv->driver_lock, flags);
	ret = cmdnode->result;
	if (ret)
		printk(KERN_DEBUG "libertastf: command 0x%04x failed: %d\n",
			    command, ret);

	__lbtf_cleanup_and_insert_cmd(priv, cmdnode);
	spin_unlock_irqrestore(&priv->driver_lock, flags);

	return ret;
}
EXPORT_SYMBOL_GPL(__lbtf_cmd);

/* Call holding driver_lock */
void lbtf_cmd_response_rx(struct lbtf_private *priv)
{
	priv->cmd_response_rxed = 1;
	queue_work(lbtf_wq, &priv->cmd_work);
}
EXPORT_SYMBOL_GPL(lbtf_cmd_response_rx);

int lbtf_process_rx_command(struct lbtf_private *priv)
{
	uint16_t respcmd, curcmd;
	struct cmd_header *resp;
	int ret = 0;
	unsigned long flags;
	uint16_t result;

	mutex_lock(&priv->lock);
	spin_lock_irqsave(&priv->driver_lock, flags);

	if (!priv->cur_cmd) {
		ret = -1;
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		goto done;
	}

	resp = (void *)priv->cmd_resp_buff;
	curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
	respcmd = le16_to_cpu(resp->command);
	result = le16_to_cpu(resp->result);

	if (net_ratelimit())
		printk(KERN_DEBUG "libertastf: cmd response 0x%04x, seq %d, size %d\n",
			respcmd, le16_to_cpu(resp->seqnum),
			le16_to_cpu(resp->size));

	if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		ret = -1;
		goto done;
	}
	if (respcmd != CMD_RET(curcmd)) {
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		ret = -1;
		goto done;
	}

	if (resp->result == cpu_to_le16(0x0004)) {
		/* 0x0004 means -EAGAIN. Drop the response, let it time out
		   and be resubmitted */
		spin_unlock_irqrestore(&priv->driver_lock, flags);
		ret = -1;
		goto done;
	}

	/* Now we got response from FW, cancel the command timer */
	del_timer(&priv->command_timer);
	priv->cmd_timed_out = 0;
	if (priv->nr_retries)
		priv->nr_retries = 0;

	/* If the command is not successful, cleanup and return failure */
	if ((result != 0 || !(respcmd & 0x8000))) {
		/*
		 * Handling errors here
		 */
		switch (respcmd) {
		case CMD_RET(CMD_GET_HW_SPEC):
		case CMD_RET(CMD_802_11_RESET):
			printk(KERN_DEBUG "libertastf: reset failed\n");
			break;

		}
		lbtf_complete_command(priv, priv->cur_cmd, result);
		spin_unlock_irqrestore(&priv->driver_lock, flags);

		ret = -1;
		goto done;
	}

	spin_unlock_irqrestore(&priv->driver_lock, flags);

	if (priv->cur_cmd && priv->cur_cmd->callback) {
		ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
				resp);
	}
	spin_lock_irqsave(&priv->driver_lock, flags);

	if (priv->cur_cmd) {
		/* Clean up and Put current command back to cmdfreeq */
		lbtf_complete_command(priv, priv->cur_cmd, result);
	}
	spin_unlock_irqrestore(&priv->driver_lock, flags);

done:
	mutex_unlock(&priv->lock);
	return ret;
}