1 /**
2  * Marvell Bluetooth driver
3  *
4  * Copyright (C) 2009, Marvell International Ltd.
5  *
6  * This software file (the "File") is distributed by Marvell International
7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8  * (the "License").  You may use, redistribute and/or modify this File in
9  * accordance with the terms and conditions of the License, a copy of which
10  * is available by writing to the Free Software Foundation, Inc.,
11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  *
14  *
15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
18  * this warranty disclaimer.
19  **/
20 
21 #include <linux/module.h>
22 #include <linux/of.h>
23 #include <net/bluetooth/bluetooth.h>
24 #include <net/bluetooth/hci_core.h>
25 #include <linux/mmc/sdio_func.h>
26 
27 #include "btmrvl_drv.h"
28 #include "btmrvl_sdio.h"
29 
30 #define VERSION "1.0"
31 
32 /*
33  * This function is called by interface specific interrupt handler.
34  * It updates Power Save & Host Sleep states, and wakes up the main
35  * thread.
36  */
37 void btmrvl_interrupt(struct btmrvl_private *priv)
38 {
39 	priv->adapter->ps_state = PS_AWAKE;
40 
41 	priv->adapter->wakeup_tries = 0;
42 
43 	priv->adapter->int_count++;
44 
45 	if (priv->adapter->hs_state == HS_ACTIVATED) {
46 		BT_DBG("BT: HS DEACTIVATED in ISR!");
47 		priv->adapter->hs_state = HS_DEACTIVATED;
48 	}
49 
50 	wake_up_interruptible(&priv->main_thread.wait_q);
51 }
52 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
53 
54 bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
55 {
56 	struct hci_event_hdr *hdr = (void *) skb->data;
57 
58 	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
59 		struct hci_ev_cmd_complete *ec;
60 		u16 opcode;
61 
62 		ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
63 		opcode = __le16_to_cpu(ec->opcode);
64 
65 		if (priv->btmrvl_dev.sendcmdflag) {
66 			priv->btmrvl_dev.sendcmdflag = false;
67 			priv->adapter->cmd_complete = true;
68 			wake_up_interruptible(&priv->adapter->cmd_wait_q);
69 
70 			if (hci_opcode_ogf(opcode) == 0x3F) {
71 				BT_DBG("vendor event skipped: opcode=%#4.4x",
72 				       opcode);
73 				kfree_skb(skb);
74 				return false;
75 			}
76 		}
77 	}
78 
79 	return true;
80 }
81 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
82 
83 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
84 {
85 	struct btmrvl_adapter *adapter = priv->adapter;
86 	struct btmrvl_event *event;
87 	int ret = 0;
88 
89 	event = (struct btmrvl_event *) skb->data;
90 	if (event->ec != 0xff) {
91 		BT_DBG("Not Marvell Event=%x", event->ec);
92 		ret = -EINVAL;
93 		goto exit;
94 	}
95 
96 	switch (event->data[0]) {
97 	case BT_EVENT_AUTO_SLEEP_MODE:
98 		if (!event->data[2]) {
99 			if (event->data[1] == BT_PS_ENABLE)
100 				adapter->psmode = 1;
101 			else
102 				adapter->psmode = 0;
103 			BT_DBG("PS Mode:%s",
104 				(adapter->psmode) ? "Enable" : "Disable");
105 		} else {
106 			BT_DBG("PS Mode command failed");
107 		}
108 		break;
109 
110 	case BT_EVENT_HOST_SLEEP_CONFIG:
111 		if (!event->data[3])
112 			BT_DBG("gpio=%x, gap=%x", event->data[1],
113 							event->data[2]);
114 		else
115 			BT_DBG("HSCFG command failed");
116 		break;
117 
118 	case BT_EVENT_HOST_SLEEP_ENABLE:
119 		if (!event->data[1]) {
120 			adapter->hs_state = HS_ACTIVATED;
121 			if (adapter->psmode)
122 				adapter->ps_state = PS_SLEEP;
123 			wake_up_interruptible(&adapter->event_hs_wait_q);
124 			BT_DBG("HS ACTIVATED!");
125 		} else {
126 			BT_DBG("HS Enable failed");
127 		}
128 		break;
129 
130 	case BT_EVENT_MODULE_CFG_REQ:
131 		if (priv->btmrvl_dev.sendcmdflag &&
132 				event->data[1] == MODULE_BRINGUP_REQ) {
133 			BT_DBG("EVENT:%s",
134 				((event->data[2] == MODULE_BROUGHT_UP) ||
135 				(event->data[2] == MODULE_ALREADY_UP)) ?
136 				"Bring-up succeed" : "Bring-up failed");
137 
138 			if (event->length > 3 && event->data[3])
139 				priv->btmrvl_dev.dev_type = HCI_AMP;
140 			else
141 				priv->btmrvl_dev.dev_type = HCI_PRIMARY;
142 
143 			BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
144 		} else if (priv->btmrvl_dev.sendcmdflag &&
145 				event->data[1] == MODULE_SHUTDOWN_REQ) {
146 			BT_DBG("EVENT:%s", (event->data[2]) ?
147 				"Shutdown failed" : "Shutdown succeed");
148 		} else {
149 			BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
150 			ret = -EINVAL;
151 		}
152 		break;
153 
154 	case BT_EVENT_POWER_STATE:
155 		if (event->data[1] == BT_PS_SLEEP)
156 			adapter->ps_state = PS_SLEEP;
157 		BT_DBG("EVENT:%s",
158 			(adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
159 		break;
160 
161 	default:
162 		BT_DBG("Unknown Event=%d", event->data[0]);
163 		ret = -EINVAL;
164 		break;
165 	}
166 
167 exit:
168 	if (!ret)
169 		kfree_skb(skb);
170 
171 	return ret;
172 }
173 EXPORT_SYMBOL_GPL(btmrvl_process_event);
174 
175 static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 opcode,
176 				const void *param, u8 len)
177 {
178 	struct sk_buff *skb;
179 	struct hci_command_hdr *hdr;
180 
181 	if (priv->surprise_removed) {
182 		BT_ERR("Card is removed");
183 		return -EFAULT;
184 	}
185 
186 	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
187 	if (!skb) {
188 		BT_ERR("No free skb");
189 		return -ENOMEM;
190 	}
191 
192 	hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
193 	hdr->opcode = cpu_to_le16(opcode);
194 	hdr->plen = len;
195 
196 	if (len)
197 		skb_put_data(skb, param, len);
198 
199 	hci_skb_pkt_type(skb) = MRVL_VENDOR_PKT;
200 
201 	skb_queue_head(&priv->adapter->tx_queue, skb);
202 
203 	priv->btmrvl_dev.sendcmdflag = true;
204 
205 	priv->adapter->cmd_complete = false;
206 
207 	wake_up_interruptible(&priv->main_thread.wait_q);
208 
209 	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
210 					      priv->adapter->cmd_complete ||
211 					      priv->surprise_removed,
212 					      WAIT_UNTIL_CMD_RESP))
213 		return -ETIMEDOUT;
214 
215 	if (priv->surprise_removed)
216 		return -EFAULT;
217 
218 	return 0;
219 }
220 
221 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, u8 subcmd)
222 {
223 	int ret;
224 
225 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
226 	if (ret)
227 		BT_ERR("module_cfg_cmd(%x) failed", subcmd);
228 
229 	return ret;
230 }
231 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
232 
233 static int btmrvl_enable_sco_routing_to_host(struct btmrvl_private *priv)
234 {
235 	int ret;
236 	u8 subcmd = 0;
237 
238 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_ROUTE_SCO_TO_HOST, &subcmd, 1);
239 	if (ret)
240 		BT_ERR("BT_CMD_ROUTE_SCO_TO_HOST command failed: %#x", ret);
241 
242 	return ret;
243 }
244 
245 int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
246 {
247 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
248 	int ret;
249 
250 	if (!card->support_pscan_win_report)
251 		return 0;
252 
253 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
254 				   &subcmd, 1);
255 	if (ret)
256 		BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);
257 
258 	return ret;
259 }
260 EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);
261 
262 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
263 {
264 	int ret;
265 	u8 param[2];
266 
267 	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
268 	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
269 
270 	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
271 	       param[0], param[1]);
272 
273 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
274 	if (ret)
275 		BT_ERR("HSCFG command failed");
276 
277 	return ret;
278 }
279 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
280 
281 int btmrvl_enable_ps(struct btmrvl_private *priv)
282 {
283 	int ret;
284 	u8 param;
285 
286 	if (priv->btmrvl_dev.psmode)
287 		param = BT_PS_ENABLE;
288 	else
289 		param = BT_PS_DISABLE;
290 
291 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
292 	if (ret)
293 		BT_ERR("PSMODE command failed");
294 
295 	return 0;
296 }
297 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
298 
299 int btmrvl_enable_hs(struct btmrvl_private *priv)
300 {
301 	struct btmrvl_adapter *adapter = priv->adapter;
302 	int ret;
303 
304 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
305 	if (ret) {
306 		BT_ERR("Host sleep enable command failed");
307 		return ret;
308 	}
309 
310 	ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
311 					       adapter->hs_state ||
312 					       priv->surprise_removed,
313 					       WAIT_UNTIL_HS_STATE_CHANGED);
314 	if (ret < 0 || priv->surprise_removed) {
315 		BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
316 		       ret, adapter->hs_state, adapter->ps_state,
317 		       adapter->wakeup_tries);
318 	} else if (!ret) {
319 		BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
320 		       adapter->ps_state, adapter->wakeup_tries);
321 		ret = -ETIMEDOUT;
322 	} else {
323 		BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
324 		       adapter->ps_state, adapter->wakeup_tries);
325 		ret = 0;
326 	}
327 
328 	return ret;
329 }
330 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
331 
332 int btmrvl_prepare_command(struct btmrvl_private *priv)
333 {
334 	int ret = 0;
335 
336 	if (priv->btmrvl_dev.hscfgcmd) {
337 		priv->btmrvl_dev.hscfgcmd = 0;
338 		btmrvl_send_hscfg_cmd(priv);
339 	}
340 
341 	if (priv->btmrvl_dev.pscmd) {
342 		priv->btmrvl_dev.pscmd = 0;
343 		btmrvl_enable_ps(priv);
344 	}
345 
346 	if (priv->btmrvl_dev.hscmd) {
347 		priv->btmrvl_dev.hscmd = 0;
348 
349 		if (priv->btmrvl_dev.hsmode) {
350 			ret = btmrvl_enable_hs(priv);
351 		} else {
352 			ret = priv->hw_wakeup_firmware(priv);
353 			priv->adapter->hs_state = HS_DEACTIVATED;
354 			BT_DBG("BT: HS DEACTIVATED due to host activity!");
355 		}
356 	}
357 
358 	return ret;
359 }
360 
361 void btmrvl_firmware_dump(struct btmrvl_private *priv)
362 {
363 	if (priv->firmware_dump)
364 		priv->firmware_dump(priv);
365 }
366 
367 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
368 {
369 	int ret = 0;
370 
371 	if (!skb || !skb->data)
372 		return -EINVAL;
373 
374 	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
375 		BT_ERR("Tx Error: Bad skb length %d : %d",
376 						skb->len, BTM_UPLD_SIZE);
377 		return -EINVAL;
378 	}
379 
380 	skb_push(skb, BTM_HEADER_LEN);
381 
382 	/* header type: byte[3]
383 	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
384 	 * header length: byte[2][1][0]
385 	 */
386 
387 	skb->data[0] = (skb->len & 0x0000ff);
388 	skb->data[1] = (skb->len & 0x00ff00) >> 8;
389 	skb->data[2] = (skb->len & 0xff0000) >> 16;
390 	skb->data[3] = hci_skb_pkt_type(skb);
391 
392 	if (priv->hw_host_to_card)
393 		ret = priv->hw_host_to_card(priv, skb->data, skb->len);
394 
395 	return ret;
396 }
397 
398 static void btmrvl_init_adapter(struct btmrvl_private *priv)
399 {
400 	int buf_size;
401 
402 	skb_queue_head_init(&priv->adapter->tx_queue);
403 
404 	priv->adapter->ps_state = PS_AWAKE;
405 
406 	buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
407 	priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
408 	if (!priv->adapter->hw_regs_buf) {
409 		priv->adapter->hw_regs = NULL;
410 		BT_ERR("Unable to allocate buffer for hw_regs.");
411 	} else {
412 		priv->adapter->hw_regs =
413 			(u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
414 					 BTSDIO_DMA_ALIGN);
415 		BT_DBG("hw_regs_buf=%p hw_regs=%p",
416 		       priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
417 	}
418 
419 	init_waitqueue_head(&priv->adapter->cmd_wait_q);
420 	init_waitqueue_head(&priv->adapter->event_hs_wait_q);
421 }
422 
423 static void btmrvl_free_adapter(struct btmrvl_private *priv)
424 {
425 	skb_queue_purge(&priv->adapter->tx_queue);
426 
427 	kfree(priv->adapter->hw_regs_buf);
428 	kfree(priv->adapter);
429 
430 	priv->adapter = NULL;
431 }
432 
433 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
434 {
435 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
436 
437 	BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
438 
439 	if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
440 		BT_ERR("%s: Device is suspending or suspended", __func__);
441 		return -EBUSY;
442 	}
443 
444 	switch (hci_skb_pkt_type(skb)) {
445 	case HCI_COMMAND_PKT:
446 		hdev->stat.cmd_tx++;
447 		break;
448 
449 	case HCI_ACLDATA_PKT:
450 		hdev->stat.acl_tx++;
451 		break;
452 
453 	case HCI_SCODATA_PKT:
454 		hdev->stat.sco_tx++;
455 		break;
456 	}
457 
458 	skb_queue_tail(&priv->adapter->tx_queue, skb);
459 
460 	if (!priv->adapter->is_suspended)
461 		wake_up_interruptible(&priv->main_thread.wait_q);
462 
463 	return 0;
464 }
465 
466 static int btmrvl_flush(struct hci_dev *hdev)
467 {
468 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
469 
470 	skb_queue_purge(&priv->adapter->tx_queue);
471 
472 	return 0;
473 }
474 
475 static int btmrvl_close(struct hci_dev *hdev)
476 {
477 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
478 
479 	skb_queue_purge(&priv->adapter->tx_queue);
480 
481 	return 0;
482 }
483 
484 static int btmrvl_open(struct hci_dev *hdev)
485 {
486 	return 0;
487 }
488 
489 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
490 				    u8 *data, int len)
491 {
492 	int ret;
493 
494 	data[0] = 0x00;
495 	data[1] = 0x00;
496 	data[2] = 0x00;
497 	data[3] = len;
498 
499 	print_hex_dump_bytes("Calibration data: ",
500 			     DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
501 
502 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
503 				   BT_CAL_HDR_LEN + len);
504 	if (ret)
505 		BT_ERR("Failed to download calibration data");
506 
507 	return 0;
508 }
509 
510 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
511 {
512 	struct device_node *dt_node;
513 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
514 	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
515 	int ret = 0;
516 	u16 gpio, gap;
517 
518 	if (card->plt_of_node) {
519 		dt_node = card->plt_of_node;
520 		ret = of_property_read_u16(dt_node, "marvell,wakeup-pin",
521 					   &gpio);
522 		if (ret)
523 			gpio = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
524 
525 		ret = of_property_read_u16(dt_node, "marvell,wakeup-gap-ms",
526 					   &gap);
527 		if (ret)
528 			gap = (u8)(priv->btmrvl_dev.gpio_gap & 0x00ff);
529 
530 		priv->btmrvl_dev.gpio_gap = (gpio << 8) + gap;
531 
532 		ret = of_property_read_u8_array(dt_node, "marvell,cal-data",
533 						cal_data + BT_CAL_HDR_LEN,
534 						BT_CAL_DATA_SIZE);
535 		if (ret)
536 			return ret;
537 
538 		BT_DBG("Use cal data from device tree");
539 		ret = btmrvl_download_cal_data(priv, cal_data,
540 					       BT_CAL_DATA_SIZE);
541 		if (ret)
542 			BT_ERR("Fail to download calibrate data");
543 	}
544 
545 	return ret;
546 }
547 
548 static int btmrvl_setup(struct hci_dev *hdev)
549 {
550 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
551 	int ret;
552 
553 	ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
554 	if (ret)
555 		return ret;
556 
557 	priv->btmrvl_dev.gpio_gap = 0xfffe;
558 
559 	btmrvl_check_device_tree(priv);
560 
561 	btmrvl_enable_sco_routing_to_host(priv);
562 
563 	btmrvl_pscan_window_reporting(priv, 0x01);
564 
565 	priv->btmrvl_dev.psmode = 1;
566 	btmrvl_enable_ps(priv);
567 
568 	btmrvl_send_hscfg_cmd(priv);
569 
570 	return 0;
571 }
572 
573 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
574 {
575 	struct sk_buff *skb;
576 	long ret;
577 	u8 buf[8];
578 
579 	buf[0] = MRVL_VENDOR_PKT;
580 	buf[1] = sizeof(bdaddr_t);
581 	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
582 
583 	skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
584 			     HCI_INIT_TIMEOUT);
585 	if (IS_ERR(skb)) {
586 		ret = PTR_ERR(skb);
587 		BT_ERR("%s: changing btmrvl device address failed (%ld)",
588 		       hdev->name, ret);
589 		return ret;
590 	}
591 	kfree_skb(skb);
592 
593 	return 0;
594 }
595 
596 /*
597  * This function handles the event generated by firmware, rx data
598  * received from firmware, and tx data sent from kernel.
599  */
600 static int btmrvl_service_main_thread(void *data)
601 {
602 	struct btmrvl_thread *thread = data;
603 	struct btmrvl_private *priv = thread->priv;
604 	struct btmrvl_adapter *adapter = priv->adapter;
605 	wait_queue_entry_t wait;
606 	struct sk_buff *skb;
607 	ulong flags;
608 
609 	init_waitqueue_entry(&wait, current);
610 
611 	for (;;) {
612 		add_wait_queue(&thread->wait_q, &wait);
613 
614 		set_current_state(TASK_INTERRUPTIBLE);
615 		if (kthread_should_stop() || priv->surprise_removed) {
616 			BT_DBG("main_thread: break from main thread");
617 			break;
618 		}
619 
620 		if (adapter->wakeup_tries ||
621 				((!adapter->int_count) &&
622 				(!priv->btmrvl_dev.tx_dnld_rdy ||
623 				skb_queue_empty(&adapter->tx_queue)))) {
624 			BT_DBG("main_thread is sleeping...");
625 			schedule();
626 		}
627 
628 		set_current_state(TASK_RUNNING);
629 
630 		remove_wait_queue(&thread->wait_q, &wait);
631 
632 		BT_DBG("main_thread woke up");
633 
634 		if (kthread_should_stop() || priv->surprise_removed) {
635 			BT_DBG("main_thread: break from main thread");
636 			break;
637 		}
638 
639 		spin_lock_irqsave(&priv->driver_lock, flags);
640 		if (adapter->int_count) {
641 			adapter->int_count = 0;
642 			spin_unlock_irqrestore(&priv->driver_lock, flags);
643 			priv->hw_process_int_status(priv);
644 		} else if (adapter->ps_state == PS_SLEEP &&
645 					!skb_queue_empty(&adapter->tx_queue)) {
646 			spin_unlock_irqrestore(&priv->driver_lock, flags);
647 			adapter->wakeup_tries++;
648 			priv->hw_wakeup_firmware(priv);
649 			continue;
650 		} else {
651 			spin_unlock_irqrestore(&priv->driver_lock, flags);
652 		}
653 
654 		if (adapter->ps_state == PS_SLEEP)
655 			continue;
656 
657 		if (!priv->btmrvl_dev.tx_dnld_rdy ||
658 		    priv->adapter->is_suspended)
659 			continue;
660 
661 		skb = skb_dequeue(&adapter->tx_queue);
662 		if (skb) {
663 			if (btmrvl_tx_pkt(priv, skb))
664 				priv->btmrvl_dev.hcidev->stat.err_tx++;
665 			else
666 				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
667 
668 			kfree_skb(skb);
669 		}
670 	}
671 
672 	return 0;
673 }
674 
675 int btmrvl_register_hdev(struct btmrvl_private *priv)
676 {
677 	struct hci_dev *hdev = NULL;
678 	int ret;
679 
680 	hdev = hci_alloc_dev();
681 	if (!hdev) {
682 		BT_ERR("Can not allocate HCI device");
683 		goto err_hdev;
684 	}
685 
686 	priv->btmrvl_dev.hcidev = hdev;
687 	hci_set_drvdata(hdev, priv);
688 
689 	hdev->bus   = HCI_SDIO;
690 	hdev->open  = btmrvl_open;
691 	hdev->close = btmrvl_close;
692 	hdev->flush = btmrvl_flush;
693 	hdev->send  = btmrvl_send_frame;
694 	hdev->setup = btmrvl_setup;
695 	hdev->set_bdaddr = btmrvl_set_bdaddr;
696 
697 	hdev->dev_type = priv->btmrvl_dev.dev_type;
698 
699 	ret = hci_register_dev(hdev);
700 	if (ret < 0) {
701 		BT_ERR("Can not register HCI device");
702 		goto err_hci_register_dev;
703 	}
704 
705 #ifdef CONFIG_DEBUG_FS
706 	btmrvl_debugfs_init(hdev);
707 #endif
708 
709 	return 0;
710 
711 err_hci_register_dev:
712 	hci_free_dev(hdev);
713 
714 err_hdev:
715 	/* Stop the thread servicing the interrupts */
716 	kthread_stop(priv->main_thread.task);
717 
718 	btmrvl_free_adapter(priv);
719 	kfree(priv);
720 
721 	return -ENOMEM;
722 }
723 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
724 
725 struct btmrvl_private *btmrvl_add_card(void *card)
726 {
727 	struct btmrvl_private *priv;
728 
729 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
730 	if (!priv) {
731 		BT_ERR("Can not allocate priv");
732 		goto err_priv;
733 	}
734 
735 	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
736 	if (!priv->adapter) {
737 		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
738 		goto err_adapter;
739 	}
740 
741 	btmrvl_init_adapter(priv);
742 
743 	BT_DBG("Starting kthread...");
744 	priv->main_thread.priv = priv;
745 	spin_lock_init(&priv->driver_lock);
746 
747 	init_waitqueue_head(&priv->main_thread.wait_q);
748 	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
749 				&priv->main_thread, "btmrvl_main_service");
750 	if (IS_ERR(priv->main_thread.task))
751 		goto err_thread;
752 
753 	priv->btmrvl_dev.card = card;
754 	priv->btmrvl_dev.tx_dnld_rdy = true;
755 
756 	return priv;
757 
758 err_thread:
759 	btmrvl_free_adapter(priv);
760 
761 err_adapter:
762 	kfree(priv);
763 
764 err_priv:
765 	return NULL;
766 }
767 EXPORT_SYMBOL_GPL(btmrvl_add_card);
768 
769 int btmrvl_remove_card(struct btmrvl_private *priv)
770 {
771 	struct hci_dev *hdev;
772 
773 	hdev = priv->btmrvl_dev.hcidev;
774 
775 	wake_up_interruptible(&priv->adapter->cmd_wait_q);
776 	wake_up_interruptible(&priv->adapter->event_hs_wait_q);
777 
778 	kthread_stop(priv->main_thread.task);
779 
780 #ifdef CONFIG_DEBUG_FS
781 	btmrvl_debugfs_remove(hdev);
782 #endif
783 
784 	hci_unregister_dev(hdev);
785 
786 	hci_free_dev(hdev);
787 
788 	priv->btmrvl_dev.hcidev = NULL;
789 
790 	btmrvl_free_adapter(priv);
791 
792 	kfree(priv);
793 
794 	return 0;
795 }
796 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
797 
798 MODULE_AUTHOR("Marvell International Ltd.");
799 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
800 MODULE_VERSION(VERSION);
801 MODULE_LICENSE("GPL v2");
802