aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/bluetooth/btmrvl_main.c
blob: de05deb444ce260a13be75af8b96eb8c8922794a (plain) (blame)
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
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
/**
 * Marvell Bluetooth driver
 *
 * Copyright (C) 2009, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 **/

#include <linux/module.h>
#include <linux/of.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <linux/mmc/sdio_func.h>

#include "btmrvl_drv.h"
#include "btmrvl_sdio.h"

#define VERSION "1.0"

/*
 * This function is called by interface specific interrupt handler.
 * It updates Power Save & Host Sleep states, and wakes up the main
 * thread.
 */
void btmrvl_interrupt(struct btmrvl_private *priv)
{
	priv->adapter->ps_state = PS_AWAKE;

	priv->adapter->wakeup_tries = 0;

	priv->adapter->int_count++;

	if (priv->adapter->hs_state == HS_ACTIVATED) {
		BT_DBG("BT: HS DEACTIVATED in ISR!");
		priv->adapter->hs_state = HS_DEACTIVATED;
	}

	wake_up_interruptible(&priv->main_thread.wait_q);
}
EXPORT_SYMBOL_GPL(btmrvl_interrupt);

bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
{
	struct hci_event_hdr *hdr = (void *) skb->data;

	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
		struct hci_ev_cmd_complete *ec;
		u16 opcode;

		ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
		opcode = __le16_to_cpu(ec->opcode);

		if (priv->btmrvl_dev.sendcmdflag) {
			priv->btmrvl_dev.sendcmdflag = false;
			priv->adapter->cmd_complete = true;
			wake_up_interruptible(&priv->adapter->cmd_wait_q);

			if (hci_opcode_ogf(opcode) == 0x3F) {
				BT_DBG("vendor event skipped: opcode=%#4.4x",
				       opcode);
				kfree_skb(skb);
				return false;
			}
		}
	}

	return true;
}
EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);

int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
{
	struct btmrvl_adapter *adapter = priv->adapter;
	struct btmrvl_event *event;
	int ret = 0;

	event = (struct btmrvl_event *) skb->data;
	if (event->ec != 0xff) {
		BT_DBG("Not Marvell Event=%x", event->ec);
		ret = -EINVAL;
		goto exit;
	}

	switch (event->data[0]) {
	case BT_EVENT_AUTO_SLEEP_MODE:
		if (!event->data[2]) {
			if (event->data[1] == BT_PS_ENABLE)
				adapter->psmode = 1;
			else
				adapter->psmode = 0;
			BT_DBG("PS Mode:%s",
				(adapter->psmode) ? "Enable" : "Disable");
		} else {
			BT_DBG("PS Mode command failed");
		}
		break;

	case BT_EVENT_HOST_SLEEP_CONFIG:
		if (!event->data[3])
			BT_DBG("gpio=%x, gap=%x", event->data[1],
							event->data[2]);
		else
			BT_DBG("HSCFG command failed");
		break;

	case BT_EVENT_HOST_SLEEP_ENABLE:
		if (!event->data[1]) {
			adapter->hs_state = HS_ACTIVATED;
			if (adapter->psmode)
				adapter->ps_state = PS_SLEEP;
			wake_up_interruptible(&adapter->event_hs_wait_q);
			BT_DBG("HS ACTIVATED!");
		} else {
			BT_DBG("HS Enable failed");
		}
		break;

	case BT_EVENT_MODULE_CFG_REQ:
		if (priv->btmrvl_dev.sendcmdflag &&
				event->data[1] == MODULE_BRINGUP_REQ) {
			BT_DBG("EVENT:%s",
				((event->data[2] == MODULE_BROUGHT_UP) ||
				(event->data[2] == MODULE_ALREADY_UP)) ?
				"Bring-up succeed" : "Bring-up failed");

			if (event->length > 3 && event->data[3])
				priv->btmrvl_dev.dev_type = HCI_AMP;
			else
				priv->btmrvl_dev.dev_type = HCI_BREDR;

			BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
		} else if (priv->btmrvl_dev.sendcmdflag &&
				event->data[1] == MODULE_SHUTDOWN_REQ) {
			BT_DBG("EVENT:%s", (event->data[2]) ?
				"Shutdown failed" : "Shutdown succeed");
		} else {
			BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
			ret = -EINVAL;
		}
		break;

	case BT_EVENT_POWER_STATE:
		if (event->data[1] == BT_PS_SLEEP)
			adapter->ps_state = PS_SLEEP;
		BT_DBG("EVENT:%s",
			(adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
		break;

	default:
		BT_DBG("Unknown Event=%d", event->data[0]);
		ret = -EINVAL;
		break;
	}

exit:
	if (!ret)
		kfree_skb(skb);

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_process_event);

static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 opcode,
				const void *param, u8 len)
{
	struct sk_buff *skb;
	struct hci_command_hdr *hdr;

	if (priv->surprise_removed) {
		BT_ERR("Card is removed");
		return -EFAULT;
	}

	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
	if (skb == NULL) {
		BT_ERR("No free skb");
		return -ENOMEM;
	}

	hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
	hdr->opcode = cpu_to_le16(opcode);
	hdr->plen = len;

	if (len)
		memcpy(skb_put(skb, len), param, len);

	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;

	skb_queue_head(&priv->adapter->tx_queue, skb);

	priv->btmrvl_dev.sendcmdflag = true;

	priv->adapter->cmd_complete = false;

	wake_up_interruptible(&priv->main_thread.wait_q);

	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
					      priv->adapter->cmd_complete ||
					      priv->surprise_removed,
					      WAIT_UNTIL_CMD_RESP))
		return -ETIMEDOUT;

	if (priv->surprise_removed)
		return -EFAULT;

	return 0;
}

int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, u8 subcmd)
{
	int ret;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
	if (ret)
		BT_ERR("module_cfg_cmd(%x) failed", subcmd);

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);

static int btmrvl_enable_sco_routing_to_host(struct btmrvl_private *priv)
{
	int ret;
	u8 subcmd = 0;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_ROUTE_SCO_TO_HOST, &subcmd, 1);
	if (ret)
		BT_ERR("BT_CMD_ROUTE_SCO_TO_HOST command failed: %#x", ret);

	return ret;
}

int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
{
	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
	int ret;

	if (!card->support_pscan_win_report)
		return 0;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
				   &subcmd, 1);
	if (ret)
		BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);

int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
{
	int ret;
	u8 param[2];

	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);

	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
	       param[0], param[1]);

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
	if (ret)
		BT_ERR("HSCFG command failed");

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);

int btmrvl_enable_ps(struct btmrvl_private *priv)
{
	int ret;
	u8 param;

	if (priv->btmrvl_dev.psmode)
		param = BT_PS_ENABLE;
	else
		param = BT_PS_DISABLE;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
	if (ret)
		BT_ERR("PSMODE command failed");

	return 0;
}
EXPORT_SYMBOL_GPL(btmrvl_enable_ps);

int btmrvl_enable_hs(struct btmrvl_private *priv)
{
	struct btmrvl_adapter *adapter = priv->adapter;
	int ret;

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
	if (ret) {
		BT_ERR("Host sleep enable command failed");
		return ret;
	}

	ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
					       adapter->hs_state ||
					       priv->surprise_removed,
					       WAIT_UNTIL_HS_STATE_CHANGED);
	if (ret < 0 || priv->surprise_removed) {
		BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
		       ret, adapter->hs_state, adapter->ps_state,
		       adapter->wakeup_tries);
	} else if (!ret) {
		BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
		       adapter->ps_state, adapter->wakeup_tries);
		ret = -ETIMEDOUT;
	} else {
		BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
		       adapter->ps_state, adapter->wakeup_tries);
		ret = 0;
	}

	return ret;
}
EXPORT_SYMBOL_GPL(btmrvl_enable_hs);

int btmrvl_prepare_command(struct btmrvl_private *priv)
{
	int ret = 0;

	if (priv->btmrvl_dev.hscfgcmd) {
		priv->btmrvl_dev.hscfgcmd = 0;
		btmrvl_send_hscfg_cmd(priv);
	}

	if (priv->btmrvl_dev.pscmd) {
		priv->btmrvl_dev.pscmd = 0;
		btmrvl_enable_ps(priv);
	}

	if (priv->btmrvl_dev.hscmd) {
		priv->btmrvl_dev.hscmd = 0;

		if (priv->btmrvl_dev.hsmode) {
			ret = btmrvl_enable_hs(priv);
		} else {
			ret = priv->hw_wakeup_firmware(priv);
			priv->adapter->hs_state = HS_DEACTIVATED;
			BT_DBG("BT: HS DEACTIVATED due to host activity!");
		}
	}

	return ret;
}

void btmrvl_firmware_dump(struct btmrvl_private *priv)
{
	if (priv->firmware_dump)
		priv->firmware_dump(priv);
}

static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
{
	int ret = 0;

	if (!skb || !skb->data)
		return -EINVAL;

	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
		BT_ERR("Tx Error: Bad skb length %d : %d",
						skb->len, BTM_UPLD_SIZE);
		return -EINVAL;
	}

	if (skb_headroom(skb) < BTM_HEADER_LEN) {
		struct sk_buff *tmp = skb;

		skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
		if (!skb) {
			BT_ERR("Tx Error: realloc_headroom failed %d",
				BTM_HEADER_LEN);
			skb = tmp;
			return -EINVAL;
		}

		kfree_skb(tmp);
	}

	skb_push(skb, BTM_HEADER_LEN);

	/* header type: byte[3]
	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
	 * header length: byte[2][1][0]
	 */

	skb->data[0] = (skb->len & 0x0000ff);
	skb->data[1] = (skb->len & 0x00ff00) >> 8;
	skb->data[2] = (skb->len & 0xff0000) >> 16;
	skb->data[3] = bt_cb(skb)->pkt_type;

	if (priv->hw_host_to_card)
		ret = priv->hw_host_to_card(priv, skb->data, skb->len);

	return ret;
}

static void btmrvl_init_adapter(struct btmrvl_private *priv)
{
	int buf_size;

	skb_queue_head_init(&priv->adapter->tx_queue);

	priv->adapter->ps_state = PS_AWAKE;

	buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
	priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
	if (!priv->adapter->hw_regs_buf) {
		priv->adapter->hw_regs = NULL;
		BT_ERR("Unable to allocate buffer for hw_regs.");
	} else {
		priv->adapter->hw_regs =
			(u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
					 BTSDIO_DMA_ALIGN);
		BT_DBG("hw_regs_buf=%p hw_regs=%p",
		       priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
	}

	init_waitqueue_head(&priv->adapter->cmd_wait_q);
	init_waitqueue_head(&priv->adapter->event_hs_wait_q);
}

static void btmrvl_free_adapter(struct btmrvl_private *priv)
{
	skb_queue_purge(&priv->adapter->tx_queue);

	kfree(priv->adapter->hw_regs_buf);
	kfree(priv->adapter);

	priv->adapter = NULL;
}

static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);

	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
		BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
		print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
							skb->data, skb->len);
		return -EBUSY;
	}

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		break;

	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		break;

	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		break;
	}

	skb_queue_tail(&priv->adapter->tx_queue, skb);

	wake_up_interruptible(&priv->main_thread.wait_q);

	return 0;
}

static int btmrvl_flush(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	skb_queue_purge(&priv->adapter->tx_queue);

	return 0;
}

static int btmrvl_close(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	skb_queue_purge(&priv->adapter->tx_queue);

	return 0;
}

static int btmrvl_open(struct hci_dev *hdev)
{
	set_bit(HCI_RUNNING, &hdev->flags);

	return 0;
}

static int btmrvl_download_cal_data(struct btmrvl_private *priv,
				    u8 *data, int len)
{
	int ret;

	data[0] = 0x00;
	data[1] = 0x00;
	data[2] = 0x00;
	data[3] = len;

	print_hex_dump_bytes("Calibration data: ",
			     DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);

	ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
				   BT_CAL_HDR_LEN + len);
	if (ret)
		BT_ERR("Failed to download caibration data");

	return 0;
}

static int btmrvl_check_device_tree(struct btmrvl_private *priv)
{
	struct device_node *dt_node;
	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
	int ret;
	u32 val;

	for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {
		ret = of_property_read_u32(dt_node, "btmrvl,gpio-gap", &val);
		if (!ret)
			priv->btmrvl_dev.gpio_gap = val;

		ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",
						cal_data + BT_CAL_HDR_LEN,
						BT_CAL_DATA_SIZE);
		if (ret)
			return ret;

		BT_DBG("Use cal data from device tree");
		ret = btmrvl_download_cal_data(priv, cal_data,
					       BT_CAL_DATA_SIZE);
		if (ret) {
			BT_ERR("Fail to download calibrate data");
			return ret;
		}
	}

	return 0;
}

static int btmrvl_setup(struct hci_dev *hdev)
{
	struct btmrvl_private *priv = hci_get_drvdata(hdev);
	int ret;

	ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
	if (ret)
		return ret;

	priv->btmrvl_dev.gpio_gap = 0xffff;

	btmrvl_check_device_tree(priv);

	btmrvl_enable_sco_routing_to_host(priv);

	btmrvl_pscan_window_reporting(priv, 0x01);

	priv->btmrvl_dev.psmode = 1;
	btmrvl_enable_ps(priv);

	btmrvl_send_hscfg_cmd(priv);

	return 0;
}

static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
{
	struct sk_buff *skb;
	long ret;
	u8 buf[8];

	buf[0] = MRVL_VENDOR_PKT;
	buf[1] = sizeof(bdaddr_t);
	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));

	skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
			     HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		ret = PTR_ERR(skb);
		BT_ERR("%s: changing btmrvl device address failed (%ld)",
		       hdev->name, ret);
		return ret;
	}
	kfree_skb(skb);

	return 0;
}

/*
 * This function handles the event generated by firmware, rx data
 * received from firmware, and tx data sent from kernel.
 */
static int btmrvl_service_main_thread(void *data)
{
	struct btmrvl_thread *thread = data;
	struct btmrvl_private *priv = thread->priv;
	struct btmrvl_adapter *adapter = priv->adapter;
	wait_queue_t wait;
	struct sk_buff *skb;
	ulong flags;

	init_waitqueue_entry(&wait, current);

	for (;;) {
		add_wait_queue(&thread->wait_q, &wait);

		set_current_state(TASK_INTERRUPTIBLE);
		if (kthread_should_stop() || priv->surprise_removed) {
			BT_DBG("main_thread: break from main thread");
			break;
		}

		if (adapter->wakeup_tries ||
				((!adapter->int_count) &&
				(!priv->btmrvl_dev.tx_dnld_rdy ||
				skb_queue_empty(&adapter->tx_queue)))) {
			BT_DBG("main_thread is sleeping...");
			schedule();
		}

		set_current_state(TASK_RUNNING);

		remove_wait_queue(&thread->wait_q, &wait);

		BT_DBG("main_thread woke up");

		if (kthread_should_stop() || priv->surprise_removed) {
			BT_DBG("main_thread: break from main thread");
			break;
		}

		spin_lock_irqsave(&priv->driver_lock, flags);
		if (adapter->int_count) {
			adapter->int_count = 0;
			spin_unlock_irqrestore(&priv->driver_lock, flags);
			priv->hw_process_int_status(priv);
		} else if (adapter->ps_state == PS_SLEEP &&
					!skb_queue_empty(&adapter->tx_queue)) {
			spin_unlock_irqrestore(&priv->driver_lock, flags);
			adapter->wakeup_tries++;
			priv->hw_wakeup_firmware(priv);
			continue;
		} else {
			spin_unlock_irqrestore(&priv->driver_lock, flags);
		}

		if (adapter->ps_state == PS_SLEEP)
			continue;

		if (!priv->btmrvl_dev.tx_dnld_rdy)
			continue;

		skb = skb_dequeue(&adapter->tx_queue);
		if (skb) {
			if (btmrvl_tx_pkt(priv, skb))
				priv->btmrvl_dev.hcidev->stat.err_tx++;
			else
				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;

			kfree_skb(skb);
		}
	}

	return 0;
}

int btmrvl_register_hdev(struct btmrvl_private *priv)
{
	struct hci_dev *hdev = NULL;
	int ret;

	hdev = hci_alloc_dev();
	if (!hdev) {
		BT_ERR("Can not allocate HCI device");
		goto err_hdev;
	}

	priv->btmrvl_dev.hcidev = hdev;
	hci_set_drvdata(hdev, priv);

	hdev->bus   = HCI_SDIO;
	hdev->open  = btmrvl_open;
	hdev->close = btmrvl_close;
	hdev->flush = btmrvl_flush;
	hdev->send  = btmrvl_send_frame;
	hdev->setup = btmrvl_setup;
	hdev->set_bdaddr = btmrvl_set_bdaddr;

	hdev->dev_type = priv->btmrvl_dev.dev_type;

	ret = hci_register_dev(hdev);
	if (ret < 0) {
		BT_ERR("Can not register HCI device");
		goto err_hci_register_dev;
	}

#ifdef CONFIG_DEBUG_FS
	btmrvl_debugfs_init(hdev);
#endif

	return 0;

err_hci_register_dev:
	hci_free_dev(hdev);

err_hdev:
	/* Stop the thread servicing the interrupts */
	kthread_stop(priv->main_thread.task);

	btmrvl_free_adapter(priv);
	kfree(priv);

	return -ENOMEM;
}
EXPORT_SYMBOL_GPL(btmrvl_register_hdev);

struct btmrvl_private *btmrvl_add_card(void *card)
{
	struct btmrvl_private *priv;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		BT_ERR("Can not allocate priv");
		goto err_priv;
	}

	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
	if (!priv->adapter) {
		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
		goto err_adapter;
	}

	btmrvl_init_adapter(priv);

	BT_DBG("Starting kthread...");
	priv->main_thread.priv = priv;
	spin_lock_init(&priv->driver_lock);

	init_waitqueue_head(&priv->main_thread.wait_q);
	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
				&priv->main_thread, "btmrvl_main_service");
	if (IS_ERR(priv->main_thread.task))
		goto err_thread;

	priv->btmrvl_dev.card = card;
	priv->btmrvl_dev.tx_dnld_rdy = true;

	return priv;

err_thread:
	btmrvl_free_adapter(priv);

err_adapter:
	kfree(priv);

err_priv:
	return NULL;
}
EXPORT_SYMBOL_GPL(btmrvl_add_card);

int btmrvl_remove_card(struct btmrvl_private *priv)
{
	struct hci_dev *hdev;

	hdev = priv->btmrvl_dev.hcidev;

	wake_up_interruptible(&priv->adapter->cmd_wait_q);
	wake_up_interruptible(&priv->adapter->event_hs_wait_q);

	kthread_stop(priv->main_thread.task);

#ifdef CONFIG_DEBUG_FS
	btmrvl_debugfs_remove(hdev);
#endif

	hci_unregister_dev(hdev);

	hci_free_dev(hdev);

	priv->btmrvl_dev.hcidev = NULL;

	btmrvl_free_adapter(priv);

	kfree(priv);

	return 0;
}
EXPORT_SYMBOL_GPL(btmrvl_remove_card);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");