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  */
btmrvl_interrupt(struct btmrvl_private * priv)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 
btmrvl_check_evtpkt(struct btmrvl_private * priv,struct sk_buff * skb)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 
btmrvl_process_event(struct btmrvl_private * priv,struct sk_buff * skb)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 
btmrvl_send_sync_cmd(struct btmrvl_private * priv,u16 opcode,const void * param,u8 len)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_KERNEL);
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 
btmrvl_send_module_cfg_cmd(struct btmrvl_private * priv,u8 subcmd)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 
btmrvl_enable_sco_routing_to_host(struct btmrvl_private * priv)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 
btmrvl_pscan_window_reporting(struct btmrvl_private * priv,u8 subcmd)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 
btmrvl_send_hscfg_cmd(struct btmrvl_private * priv)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 
btmrvl_enable_ps(struct btmrvl_private * priv)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 
btmrvl_enable_hs(struct btmrvl_private * priv)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 
btmrvl_prepare_command(struct btmrvl_private * priv)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 
btmrvl_tx_pkt(struct btmrvl_private * priv,struct sk_buff * skb)361 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
362 {
363 	int ret = 0;
364 
365 	if (!skb || !skb->data)
366 		return -EINVAL;
367 
368 	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
369 		BT_ERR("Tx Error: Bad skb length %d : %d",
370 						skb->len, BTM_UPLD_SIZE);
371 		return -EINVAL;
372 	}
373 
374 	skb_push(skb, BTM_HEADER_LEN);
375 
376 	/* header type: byte[3]
377 	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
378 	 * header length: byte[2][1][0]
379 	 */
380 
381 	skb->data[0] = (skb->len & 0x0000ff);
382 	skb->data[1] = (skb->len & 0x00ff00) >> 8;
383 	skb->data[2] = (skb->len & 0xff0000) >> 16;
384 	skb->data[3] = hci_skb_pkt_type(skb);
385 
386 	if (priv->hw_host_to_card)
387 		ret = priv->hw_host_to_card(priv, skb->data, skb->len);
388 
389 	return ret;
390 }
391 
btmrvl_init_adapter(struct btmrvl_private * priv)392 static void btmrvl_init_adapter(struct btmrvl_private *priv)
393 {
394 	int buf_size;
395 
396 	skb_queue_head_init(&priv->adapter->tx_queue);
397 
398 	priv->adapter->ps_state = PS_AWAKE;
399 
400 	buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
401 	priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
402 	if (!priv->adapter->hw_regs_buf) {
403 		priv->adapter->hw_regs = NULL;
404 		BT_ERR("Unable to allocate buffer for hw_regs.");
405 	} else {
406 		priv->adapter->hw_regs =
407 			(u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
408 					 BTSDIO_DMA_ALIGN);
409 		BT_DBG("hw_regs_buf=%p hw_regs=%p",
410 		       priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
411 	}
412 
413 	init_waitqueue_head(&priv->adapter->cmd_wait_q);
414 	init_waitqueue_head(&priv->adapter->event_hs_wait_q);
415 }
416 
btmrvl_free_adapter(struct btmrvl_private * priv)417 static void btmrvl_free_adapter(struct btmrvl_private *priv)
418 {
419 	skb_queue_purge(&priv->adapter->tx_queue);
420 
421 	kfree(priv->adapter->hw_regs_buf);
422 	kfree(priv->adapter);
423 
424 	priv->adapter = NULL;
425 }
426 
btmrvl_send_frame(struct hci_dev * hdev,struct sk_buff * skb)427 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
428 {
429 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
430 
431 	BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
432 
433 	if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
434 		BT_ERR("%s: Device is suspending or suspended", __func__);
435 		return -EBUSY;
436 	}
437 
438 	switch (hci_skb_pkt_type(skb)) {
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 	if (!priv->adapter->is_suspended)
455 		wake_up_interruptible(&priv->main_thread.wait_q);
456 
457 	return 0;
458 }
459 
btmrvl_flush(struct hci_dev * hdev)460 static int btmrvl_flush(struct hci_dev *hdev)
461 {
462 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
463 
464 	skb_queue_purge(&priv->adapter->tx_queue);
465 
466 	return 0;
467 }
468 
btmrvl_close(struct hci_dev * hdev)469 static int btmrvl_close(struct hci_dev *hdev)
470 {
471 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
472 
473 	skb_queue_purge(&priv->adapter->tx_queue);
474 
475 	return 0;
476 }
477 
btmrvl_open(struct hci_dev * hdev)478 static int btmrvl_open(struct hci_dev *hdev)
479 {
480 	return 0;
481 }
482 
btmrvl_download_cal_data(struct btmrvl_private * priv,u8 * data,int len)483 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
484 				    u8 *data, int len)
485 {
486 	int ret;
487 
488 	data[0] = 0x00;
489 	data[1] = 0x00;
490 	data[2] = 0x00;
491 	data[3] = len;
492 
493 	print_hex_dump_bytes("Calibration data: ",
494 			     DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
495 
496 	ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
497 				   BT_CAL_HDR_LEN + len);
498 	if (ret)
499 		BT_ERR("Failed to download calibration data");
500 
501 	return 0;
502 }
503 
btmrvl_check_device_tree(struct btmrvl_private * priv)504 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
505 {
506 	struct device_node *dt_node;
507 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
508 	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
509 	int ret = 0;
510 	u16 gpio, gap;
511 
512 	if (card->plt_of_node) {
513 		dt_node = card->plt_of_node;
514 		ret = of_property_read_u16(dt_node, "marvell,wakeup-pin",
515 					   &gpio);
516 		if (ret)
517 			gpio = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
518 
519 		ret = of_property_read_u16(dt_node, "marvell,wakeup-gap-ms",
520 					   &gap);
521 		if (ret)
522 			gap = (u8)(priv->btmrvl_dev.gpio_gap & 0x00ff);
523 
524 		priv->btmrvl_dev.gpio_gap = (gpio << 8) + gap;
525 
526 		ret = of_property_read_u8_array(dt_node, "marvell,cal-data",
527 						cal_data + BT_CAL_HDR_LEN,
528 						BT_CAL_DATA_SIZE);
529 		if (ret)
530 			return ret;
531 
532 		BT_DBG("Use cal data from device tree");
533 		ret = btmrvl_download_cal_data(priv, cal_data,
534 					       BT_CAL_DATA_SIZE);
535 		if (ret)
536 			BT_ERR("Fail to download calibrate data");
537 	}
538 
539 	return ret;
540 }
541 
btmrvl_setup(struct hci_dev * hdev)542 static int btmrvl_setup(struct hci_dev *hdev)
543 {
544 	struct btmrvl_private *priv = hci_get_drvdata(hdev);
545 	int ret;
546 
547 	ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
548 	if (ret)
549 		return ret;
550 
551 	priv->btmrvl_dev.gpio_gap = 0xfffe;
552 
553 	btmrvl_check_device_tree(priv);
554 
555 	btmrvl_enable_sco_routing_to_host(priv);
556 
557 	btmrvl_pscan_window_reporting(priv, 0x01);
558 
559 	priv->btmrvl_dev.psmode = 1;
560 	btmrvl_enable_ps(priv);
561 
562 	btmrvl_send_hscfg_cmd(priv);
563 
564 	return 0;
565 }
566 
btmrvl_set_bdaddr(struct hci_dev * hdev,const bdaddr_t * bdaddr)567 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
568 {
569 	struct sk_buff *skb;
570 	long ret;
571 	u8 buf[8];
572 
573 	buf[0] = MRVL_VENDOR_PKT;
574 	buf[1] = sizeof(bdaddr_t);
575 	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
576 
577 	skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
578 			     HCI_INIT_TIMEOUT);
579 	if (IS_ERR(skb)) {
580 		ret = PTR_ERR(skb);
581 		BT_ERR("%s: changing btmrvl device address failed (%ld)",
582 		       hdev->name, ret);
583 		return ret;
584 	}
585 	kfree_skb(skb);
586 
587 	return 0;
588 }
589 
590 /*
591  * This function handles the event generated by firmware, rx data
592  * received from firmware, and tx data sent from kernel.
593  */
btmrvl_service_main_thread(void * data)594 static int btmrvl_service_main_thread(void *data)
595 {
596 	struct btmrvl_thread *thread = data;
597 	struct btmrvl_private *priv = thread->priv;
598 	struct btmrvl_adapter *adapter = priv->adapter;
599 	wait_queue_entry_t wait;
600 	struct sk_buff *skb;
601 	ulong flags;
602 
603 	init_waitqueue_entry(&wait, current);
604 
605 	for (;;) {
606 		add_wait_queue(&thread->wait_q, &wait);
607 
608 		set_current_state(TASK_INTERRUPTIBLE);
609 		if (kthread_should_stop() || priv->surprise_removed) {
610 			BT_DBG("main_thread: break from main thread");
611 			break;
612 		}
613 
614 		if (adapter->wakeup_tries ||
615 				((!adapter->int_count) &&
616 				(!priv->btmrvl_dev.tx_dnld_rdy ||
617 				skb_queue_empty(&adapter->tx_queue)))) {
618 			BT_DBG("main_thread is sleeping...");
619 			schedule();
620 		}
621 
622 		set_current_state(TASK_RUNNING);
623 
624 		remove_wait_queue(&thread->wait_q, &wait);
625 
626 		BT_DBG("main_thread woke up");
627 
628 		if (kthread_should_stop() || priv->surprise_removed) {
629 			BT_DBG("main_thread: break from main thread");
630 			break;
631 		}
632 
633 		spin_lock_irqsave(&priv->driver_lock, flags);
634 		if (adapter->int_count) {
635 			adapter->int_count = 0;
636 			spin_unlock_irqrestore(&priv->driver_lock, flags);
637 			priv->hw_process_int_status(priv);
638 		} else if (adapter->ps_state == PS_SLEEP &&
639 					!skb_queue_empty(&adapter->tx_queue)) {
640 			spin_unlock_irqrestore(&priv->driver_lock, flags);
641 			adapter->wakeup_tries++;
642 			priv->hw_wakeup_firmware(priv);
643 			continue;
644 		} else {
645 			spin_unlock_irqrestore(&priv->driver_lock, flags);
646 		}
647 
648 		if (adapter->ps_state == PS_SLEEP)
649 			continue;
650 
651 		if (!priv->btmrvl_dev.tx_dnld_rdy ||
652 		    priv->adapter->is_suspended)
653 			continue;
654 
655 		skb = skb_dequeue(&adapter->tx_queue);
656 		if (skb) {
657 			if (btmrvl_tx_pkt(priv, skb))
658 				priv->btmrvl_dev.hcidev->stat.err_tx++;
659 			else
660 				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
661 
662 			kfree_skb(skb);
663 		}
664 	}
665 
666 	return 0;
667 }
668 
btmrvl_register_hdev(struct btmrvl_private * priv)669 int btmrvl_register_hdev(struct btmrvl_private *priv)
670 {
671 	struct hci_dev *hdev = NULL;
672 	int ret;
673 
674 	hdev = hci_alloc_dev();
675 	if (!hdev) {
676 		BT_ERR("Can not allocate HCI device");
677 		goto err_hdev;
678 	}
679 
680 	priv->btmrvl_dev.hcidev = hdev;
681 	hci_set_drvdata(hdev, priv);
682 
683 	hdev->bus   = HCI_SDIO;
684 	hdev->open  = btmrvl_open;
685 	hdev->close = btmrvl_close;
686 	hdev->flush = btmrvl_flush;
687 	hdev->send  = btmrvl_send_frame;
688 	hdev->setup = btmrvl_setup;
689 	hdev->set_bdaddr = btmrvl_set_bdaddr;
690 
691 	hdev->dev_type = priv->btmrvl_dev.dev_type;
692 
693 	ret = hci_register_dev(hdev);
694 	if (ret < 0) {
695 		BT_ERR("Can not register HCI device");
696 		goto err_hci_register_dev;
697 	}
698 
699 #ifdef CONFIG_DEBUG_FS
700 	btmrvl_debugfs_init(hdev);
701 #endif
702 
703 	return 0;
704 
705 err_hci_register_dev:
706 	hci_free_dev(hdev);
707 
708 err_hdev:
709 	/* Stop the thread servicing the interrupts */
710 	kthread_stop(priv->main_thread.task);
711 
712 	btmrvl_free_adapter(priv);
713 	kfree(priv);
714 
715 	return -ENOMEM;
716 }
717 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
718 
btmrvl_add_card(void * card)719 struct btmrvl_private *btmrvl_add_card(void *card)
720 {
721 	struct btmrvl_private *priv;
722 
723 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
724 	if (!priv) {
725 		BT_ERR("Can not allocate priv");
726 		goto err_priv;
727 	}
728 
729 	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
730 	if (!priv->adapter) {
731 		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
732 		goto err_adapter;
733 	}
734 
735 	btmrvl_init_adapter(priv);
736 
737 	BT_DBG("Starting kthread...");
738 	priv->main_thread.priv = priv;
739 	spin_lock_init(&priv->driver_lock);
740 
741 	init_waitqueue_head(&priv->main_thread.wait_q);
742 	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
743 				&priv->main_thread, "btmrvl_main_service");
744 	if (IS_ERR(priv->main_thread.task))
745 		goto err_thread;
746 
747 	priv->btmrvl_dev.card = card;
748 	priv->btmrvl_dev.tx_dnld_rdy = true;
749 
750 	return priv;
751 
752 err_thread:
753 	btmrvl_free_adapter(priv);
754 
755 err_adapter:
756 	kfree(priv);
757 
758 err_priv:
759 	return NULL;
760 }
761 EXPORT_SYMBOL_GPL(btmrvl_add_card);
762 
btmrvl_remove_card(struct btmrvl_private * priv)763 int btmrvl_remove_card(struct btmrvl_private *priv)
764 {
765 	struct hci_dev *hdev;
766 
767 	hdev = priv->btmrvl_dev.hcidev;
768 
769 	wake_up_interruptible(&priv->adapter->cmd_wait_q);
770 	wake_up_interruptible(&priv->adapter->event_hs_wait_q);
771 
772 	kthread_stop(priv->main_thread.task);
773 
774 #ifdef CONFIG_DEBUG_FS
775 	btmrvl_debugfs_remove(hdev);
776 #endif
777 
778 	hci_unregister_dev(hdev);
779 
780 	hci_free_dev(hdev);
781 
782 	priv->btmrvl_dev.hcidev = NULL;
783 
784 	btmrvl_free_adapter(priv);
785 
786 	kfree(priv);
787 
788 	return 0;
789 }
790 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
791 
792 MODULE_AUTHOR("Marvell International Ltd.");
793 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
794 MODULE_VERSION(VERSION);
795 MODULE_LICENSE("GPL v2");
796