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_BREDR;
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 	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
182 	if (skb == NULL) {
183 		BT_ERR("No free skb");
184 		return -ENOMEM;
185 	}
186 
187 	hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
188 	hdr->opcode = cpu_to_le16(opcode);
189 	hdr->plen = len;
190 
191 	if (len)
192 		memcpy(skb_put(skb, len), param, len);
193 
194 	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
195 
196 	skb_queue_head(&priv->adapter->tx_queue, skb);
197 
198 	priv->btmrvl_dev.sendcmdflag = true;
199 
200 	priv->adapter->cmd_complete = false;
201 
202 	wake_up_interruptible(&priv->main_thread.wait_q);
203 
204 	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
205 				priv->adapter->cmd_complete,
206 				msecs_to_jiffies(WAIT_UNTIL_CMD_RESP)))
207 		return -ETIMEDOUT;
208 
209 	return 0;
210 }
211 
212 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, u8 subcmd)
213 {
214 	int ret;
215 
216 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
217 	if (ret)
218 		BT_ERR("module_cfg_cmd(%x) failed", subcmd);
219 
220 	return ret;
221 }
222 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
223 
224 int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
225 {
226 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
227 	int ret;
228 
229 	if (!card->support_pscan_win_report)
230 		return 0;
231 
232 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
233 				   &subcmd, 1);
234 	if (ret)
235 		BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);
236 
237 	return ret;
238 }
239 EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);
240 
241 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
242 {
243 	int ret;
244 	u8 param[2];
245 
246 	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
247 	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
248 
249 	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
250 	       param[0], param[1]);
251 
252 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
253 	if (ret)
254 		BT_ERR("HSCFG command failed");
255 
256 	return ret;
257 }
258 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
259 
260 int btmrvl_enable_ps(struct btmrvl_private *priv)
261 {
262 	int ret;
263 	u8 param;
264 
265 	if (priv->btmrvl_dev.psmode)
266 		param = BT_PS_ENABLE;
267 	else
268 		param = BT_PS_DISABLE;
269 
270 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
271 	if (ret)
272 		BT_ERR("PSMODE command failed");
273 
274 	return 0;
275 }
276 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
277 
278 int btmrvl_enable_hs(struct btmrvl_private *priv)
279 {
280 	struct btmrvl_adapter *adapter = priv->adapter;
281 	int ret;
282 
283 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
284 	if (ret) {
285 		BT_ERR("Host sleep enable command failed");
286 		return ret;
287 	}
288 
289 	ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
290 					       adapter->hs_state,
291 			msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED));
292 	if (ret < 0) {
293 		BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
294 		       ret, adapter->hs_state, adapter->ps_state,
295 		       adapter->wakeup_tries);
296 	} else if (!ret) {
297 		BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
298 		       adapter->ps_state, adapter->wakeup_tries);
299 		ret = -ETIMEDOUT;
300 	} else {
301 		BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
302 		       adapter->ps_state, adapter->wakeup_tries);
303 		ret = 0;
304 	}
305 
306 	return ret;
307 }
308 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
309 
310 int btmrvl_prepare_command(struct btmrvl_private *priv)
311 {
312 	int ret = 0;
313 
314 	if (priv->btmrvl_dev.hscfgcmd) {
315 		priv->btmrvl_dev.hscfgcmd = 0;
316 		btmrvl_send_hscfg_cmd(priv);
317 	}
318 
319 	if (priv->btmrvl_dev.pscmd) {
320 		priv->btmrvl_dev.pscmd = 0;
321 		btmrvl_enable_ps(priv);
322 	}
323 
324 	if (priv->btmrvl_dev.hscmd) {
325 		priv->btmrvl_dev.hscmd = 0;
326 
327 		if (priv->btmrvl_dev.hsmode) {
328 			ret = btmrvl_enable_hs(priv);
329 		} else {
330 			ret = priv->hw_wakeup_firmware(priv);
331 			priv->adapter->hs_state = HS_DEACTIVATED;
332 			BT_DBG("BT: HS DEACTIVATED due to host activity!");
333 		}
334 	}
335 
336 	return ret;
337 }
338 
339 void btmrvl_firmware_dump(struct btmrvl_private *priv)
340 {
341 	if (priv->firmware_dump)
342 		priv->firmware_dump(priv);
343 }
344 
345 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
346 {
347 	int ret = 0;
348 
349 	if (!skb || !skb->data)
350 		return -EINVAL;
351 
352 	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
353 		BT_ERR("Tx Error: Bad skb length %d : %d",
354 						skb->len, BTM_UPLD_SIZE);
355 		return -EINVAL;
356 	}
357 
358 	if (skb_headroom(skb) < BTM_HEADER_LEN) {
359 		struct sk_buff *tmp = skb;
360 
361 		skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
362 		if (!skb) {
363 			BT_ERR("Tx Error: realloc_headroom failed %d",
364 				BTM_HEADER_LEN);
365 			skb = tmp;
366 			return -EINVAL;
367 		}
368 
369 		kfree_skb(tmp);
370 	}
371 
372 	skb_push(skb, BTM_HEADER_LEN);
373 
374 	/* header type: byte[3]
375 	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
376 	 * header length: byte[2][1][0]
377 	 */
378 
379 	skb->data[0] = (skb->len & 0x0000ff);
380 	skb->data[1] = (skb->len & 0x00ff00) >> 8;
381 	skb->data[2] = (skb->len & 0xff0000) >> 16;
382 	skb->data[3] = bt_cb(skb)->pkt_type;
383 
384 	if (priv->hw_host_to_card)
385 		ret = priv->hw_host_to_card(priv, skb->data, skb->len);
386 
387 	return ret;
388 }
389 
390 static void btmrvl_init_adapter(struct btmrvl_private *priv)
391 {
392 	int buf_size;
393 
394 	skb_queue_head_init(&priv->adapter->tx_queue);
395 
396 	priv->adapter->ps_state = PS_AWAKE;
397 
398 	buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
399 	priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
400 	if (!priv->adapter->hw_regs_buf) {
401 		priv->adapter->hw_regs = NULL;
402 		BT_ERR("Unable to allocate buffer for hw_regs.");
403 	} else {
404 		priv->adapter->hw_regs =
405 			(u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
406 					 BTSDIO_DMA_ALIGN);
407 		BT_DBG("hw_regs_buf=%p hw_regs=%p",
408 		       priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
409 	}
410 
411 	init_waitqueue_head(&priv->adapter->cmd_wait_q);
412 	init_waitqueue_head(&priv->adapter->event_hs_wait_q);
413 }
414 
415 static void btmrvl_free_adapter(struct btmrvl_private *priv)
416 {
417 	skb_queue_purge(&priv->adapter->tx_queue);
418 
419 	kfree(priv->adapter->hw_regs_buf);
420 	kfree(priv->adapter);
421 
422 	priv->adapter = NULL;
423 }
424 
425 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
426 {
427 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
428 
429 	BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
430 
431 	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
432 		BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
433 		print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
434 							skb->data, skb->len);
435 		return -EBUSY;
436 	}
437 
438 	switch (bt_cb(skb)->pkt_type) {
439 	case HCI_COMMAND_PKT:
440 		hdev->stat.cmd_tx++;
441 		break;
442 
443 	case HCI_ACLDATA_PKT:
444 		hdev->stat.acl_tx++;
445 		break;
446 
447 	case HCI_SCODATA_PKT:
448 		hdev->stat.sco_tx++;
449 		break;
450 	}
451 
452 	skb_queue_tail(&priv->adapter->tx_queue, skb);
453 
454 	wake_up_interruptible(&priv->main_thread.wait_q);
455 
456 	return 0;
457 }
458 
459 static int btmrvl_flush(struct hci_dev *hdev)
460 {
461 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
462 
463 	skb_queue_purge(&priv->adapter->tx_queue);
464 
465 	return 0;
466 }
467 
468 static int btmrvl_close(struct hci_dev *hdev)
469 {
470 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
471 
472 	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
473 		return 0;
474 
475 	skb_queue_purge(&priv->adapter->tx_queue);
476 
477 	return 0;
478 }
479 
480 static int btmrvl_open(struct hci_dev *hdev)
481 {
482 	set_bit(HCI_RUNNING, &hdev->flags);
483 
484 	return 0;
485 }
486 
487 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
488 				    u8 *data, int len)
489 {
490 	int ret;
491 
492 	data[0] = 0x00;
493 	data[1] = 0x00;
494 	data[2] = 0x00;
495 	data[3] = len;
496 
497 	print_hex_dump_bytes("Calibration data: ",
498 			     DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
499 
500 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
501 				   BT_CAL_HDR_LEN + len);
502 	if (ret)
503 		BT_ERR("Failed to download caibration data");
504 
505 	return 0;
506 }
507 
508 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
509 {
510 	struct device_node *dt_node;
511 	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
512 	int ret;
513 	u32 val;
514 
515 	for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {
516 		ret = of_property_read_u32(dt_node, "btmrvl,gpio-gap", &val);
517 		if (!ret)
518 			priv->btmrvl_dev.gpio_gap = val;
519 
520 		ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",
521 						cal_data + BT_CAL_HDR_LEN,
522 						BT_CAL_DATA_SIZE);
523 		if (ret)
524 			return ret;
525 
526 		BT_DBG("Use cal data from device tree");
527 		ret = btmrvl_download_cal_data(priv, cal_data,
528 					       BT_CAL_DATA_SIZE);
529 		if (ret) {
530 			BT_ERR("Fail to download calibrate data");
531 			return ret;
532 		}
533 	}
534 
535 	return 0;
536 }
537 
538 static int btmrvl_setup(struct hci_dev *hdev)
539 {
540 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
541 
542 	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
543 
544 	priv->btmrvl_dev.gpio_gap = 0xffff;
545 
546 	btmrvl_check_device_tree(priv);
547 
548 	btmrvl_pscan_window_reporting(priv, 0x01);
549 
550 	priv->btmrvl_dev.psmode = 1;
551 	btmrvl_enable_ps(priv);
552 
553 	btmrvl_send_hscfg_cmd(priv);
554 
555 	return 0;
556 }
557 
558 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
559 {
560 	struct sk_buff *skb;
561 	long ret;
562 	u8 buf[8];
563 
564 	buf[0] = MRVL_VENDOR_PKT;
565 	buf[1] = sizeof(bdaddr_t);
566 	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
567 
568 	skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
569 			     HCI_INIT_TIMEOUT);
570 	if (IS_ERR(skb)) {
571 		ret = PTR_ERR(skb);
572 		BT_ERR("%s: changing btmrvl device address failed (%ld)",
573 		       hdev->name, ret);
574 		return ret;
575 	}
576 	kfree_skb(skb);
577 
578 	return 0;
579 }
580 
581 /*
582  * This function handles the event generated by firmware, rx data
583  * received from firmware, and tx data sent from kernel.
584  */
585 static int btmrvl_service_main_thread(void *data)
586 {
587 	struct btmrvl_thread *thread = data;
588 	struct btmrvl_private *priv = thread->priv;
589 	struct btmrvl_adapter *adapter = priv->adapter;
590 	wait_queue_t wait;
591 	struct sk_buff *skb;
592 	ulong flags;
593 
594 	init_waitqueue_entry(&wait, current);
595 
596 	for (;;) {
597 		add_wait_queue(&thread->wait_q, &wait);
598 
599 		set_current_state(TASK_INTERRUPTIBLE);
600 		if (kthread_should_stop()) {
601 			BT_DBG("main_thread: break from main thread");
602 			break;
603 		}
604 
605 		if (adapter->wakeup_tries ||
606 				((!adapter->int_count) &&
607 				(!priv->btmrvl_dev.tx_dnld_rdy ||
608 				skb_queue_empty(&adapter->tx_queue)))) {
609 			BT_DBG("main_thread is sleeping...");
610 			schedule();
611 		}
612 
613 		set_current_state(TASK_RUNNING);
614 
615 		remove_wait_queue(&thread->wait_q, &wait);
616 
617 		BT_DBG("main_thread woke up");
618 
619 		spin_lock_irqsave(&priv->driver_lock, flags);
620 		if (adapter->int_count) {
621 			adapter->int_count = 0;
622 			spin_unlock_irqrestore(&priv->driver_lock, flags);
623 			priv->hw_process_int_status(priv);
624 		} else if (adapter->ps_state == PS_SLEEP &&
625 					!skb_queue_empty(&adapter->tx_queue)) {
626 			spin_unlock_irqrestore(&priv->driver_lock, flags);
627 			adapter->wakeup_tries++;
628 			priv->hw_wakeup_firmware(priv);
629 			continue;
630 		} else {
631 			spin_unlock_irqrestore(&priv->driver_lock, flags);
632 		}
633 
634 		if (adapter->ps_state == PS_SLEEP)
635 			continue;
636 
637 		if (!priv->btmrvl_dev.tx_dnld_rdy)
638 			continue;
639 
640 		skb = skb_dequeue(&adapter->tx_queue);
641 		if (skb) {
642 			if (btmrvl_tx_pkt(priv, skb))
643 				priv->btmrvl_dev.hcidev->stat.err_tx++;
644 			else
645 				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
646 
647 			kfree_skb(skb);
648 		}
649 	}
650 
651 	return 0;
652 }
653 
654 int btmrvl_register_hdev(struct btmrvl_private *priv)
655 {
656 	struct hci_dev *hdev = NULL;
657 	int ret;
658 
659 	hdev = hci_alloc_dev();
660 	if (!hdev) {
661 		BT_ERR("Can not allocate HCI device");
662 		goto err_hdev;
663 	}
664 
665 	priv->btmrvl_dev.hcidev = hdev;
666 	hci_set_drvdata(hdev, priv);
667 
668 	hdev->bus   = HCI_SDIO;
669 	hdev->open  = btmrvl_open;
670 	hdev->close = btmrvl_close;
671 	hdev->flush = btmrvl_flush;
672 	hdev->send  = btmrvl_send_frame;
673 	hdev->setup = btmrvl_setup;
674 	hdev->set_bdaddr = btmrvl_set_bdaddr;
675 
676 	hdev->dev_type = priv->btmrvl_dev.dev_type;
677 
678 	ret = hci_register_dev(hdev);
679 	if (ret < 0) {
680 		BT_ERR("Can not register HCI device");
681 		goto err_hci_register_dev;
682 	}
683 
684 #ifdef CONFIG_DEBUG_FS
685 	btmrvl_debugfs_init(hdev);
686 #endif
687 
688 	return 0;
689 
690 err_hci_register_dev:
691 	hci_free_dev(hdev);
692 
693 err_hdev:
694 	/* Stop the thread servicing the interrupts */
695 	kthread_stop(priv->main_thread.task);
696 
697 	btmrvl_free_adapter(priv);
698 	kfree(priv);
699 
700 	return -ENOMEM;
701 }
702 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
703 
704 struct btmrvl_private *btmrvl_add_card(void *card)
705 {
706 	struct btmrvl_private *priv;
707 
708 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
709 	if (!priv) {
710 		BT_ERR("Can not allocate priv");
711 		goto err_priv;
712 	}
713 
714 	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
715 	if (!priv->adapter) {
716 		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
717 		goto err_adapter;
718 	}
719 
720 	btmrvl_init_adapter(priv);
721 
722 	BT_DBG("Starting kthread...");
723 	priv->main_thread.priv = priv;
724 	spin_lock_init(&priv->driver_lock);
725 
726 	init_waitqueue_head(&priv->main_thread.wait_q);
727 	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
728 				&priv->main_thread, "btmrvl_main_service");
729 	if (IS_ERR(priv->main_thread.task))
730 		goto err_thread;
731 
732 	priv->btmrvl_dev.card = card;
733 	priv->btmrvl_dev.tx_dnld_rdy = true;
734 
735 	return priv;
736 
737 err_thread:
738 	btmrvl_free_adapter(priv);
739 
740 err_adapter:
741 	kfree(priv);
742 
743 err_priv:
744 	return NULL;
745 }
746 EXPORT_SYMBOL_GPL(btmrvl_add_card);
747 
748 int btmrvl_remove_card(struct btmrvl_private *priv)
749 {
750 	struct hci_dev *hdev;
751 
752 	hdev = priv->btmrvl_dev.hcidev;
753 
754 	wake_up_interruptible(&priv->adapter->cmd_wait_q);
755 	wake_up_interruptible(&priv->adapter->event_hs_wait_q);
756 
757 	kthread_stop(priv->main_thread.task);
758 
759 #ifdef CONFIG_DEBUG_FS
760 	btmrvl_debugfs_remove(hdev);
761 #endif
762 
763 	hci_unregister_dev(hdev);
764 
765 	hci_free_dev(hdev);
766 
767 	priv->btmrvl_dev.hcidev = NULL;
768 
769 	btmrvl_free_adapter(priv);
770 
771 	kfree(priv);
772 
773 	return 0;
774 }
775 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
776 
777 MODULE_AUTHOR("Marvell International Ltd.");
778 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
779 MODULE_VERSION(VERSION);
780 MODULE_LICENSE("GPL v2");
781