Bluetooth: Add support for Sony Vaio T-Series
[linux-3.10.git] / drivers / bluetooth / btmrvl_main.c
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
23 #include <net/bluetooth/bluetooth.h>
24 #include <net/bluetooth/hci_core.h>
25
26 #include "btmrvl_drv.h"
27
28 #define VERSION "1.0"
29
30 /*
31  * This function is called by interface specific interrupt handler.
32  * It updates Power Save & Host Sleep states, and wakes up the main
33  * thread.
34  */
35 void btmrvl_interrupt(struct btmrvl_private *priv)
36 {
37         priv->adapter->ps_state = PS_AWAKE;
38
39         priv->adapter->wakeup_tries = 0;
40
41         priv->adapter->int_count++;
42
43         wake_up_interruptible(&priv->main_thread.wait_q);
44 }
45 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
46
47 bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
48 {
49         struct hci_event_hdr *hdr = (void *) skb->data;
50
51         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
52                 struct hci_ev_cmd_complete *ec;
53                 u16 opcode, ocf, ogf;
54
55                 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
56                 opcode = __le16_to_cpu(ec->opcode);
57                 ocf = hci_opcode_ocf(opcode);
58                 ogf = hci_opcode_ogf(opcode);
59
60                 if (ocf == BT_CMD_MODULE_CFG_REQ &&
61                                         priv->btmrvl_dev.sendcmdflag) {
62                         priv->btmrvl_dev.sendcmdflag = false;
63                         priv->adapter->cmd_complete = true;
64                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
65                 }
66
67                 if (ogf == OGF) {
68                         BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
69                                ogf, ocf);
70                         kfree_skb(skb);
71                         return false;
72                 }
73         }
74
75         return true;
76 }
77 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
78
79 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
80 {
81         struct btmrvl_adapter *adapter = priv->adapter;
82         struct btmrvl_event *event;
83         int ret = 0;
84
85         event = (struct btmrvl_event *) skb->data;
86         if (event->ec != 0xff) {
87                 BT_DBG("Not Marvell Event=%x", event->ec);
88                 ret = -EINVAL;
89                 goto exit;
90         }
91
92         switch (event->data[0]) {
93         case BT_CMD_AUTO_SLEEP_MODE:
94                 if (!event->data[2]) {
95                         if (event->data[1] == BT_PS_ENABLE)
96                                 adapter->psmode = 1;
97                         else
98                                 adapter->psmode = 0;
99                         BT_DBG("PS Mode:%s",
100                                 (adapter->psmode) ? "Enable" : "Disable");
101                 } else {
102                         BT_DBG("PS Mode command failed");
103                 }
104                 break;
105
106         case BT_CMD_HOST_SLEEP_CONFIG:
107                 if (!event->data[3])
108                         BT_DBG("gpio=%x, gap=%x", event->data[1],
109                                                         event->data[2]);
110                 else
111                         BT_DBG("HSCFG command failed");
112                 break;
113
114         case BT_CMD_HOST_SLEEP_ENABLE:
115                 if (!event->data[1]) {
116                         adapter->hs_state = HS_ACTIVATED;
117                         if (adapter->psmode)
118                                 adapter->ps_state = PS_SLEEP;
119                         wake_up_interruptible(&adapter->cmd_wait_q);
120                         BT_DBG("HS ACTIVATED!");
121                 } else {
122                         BT_DBG("HS Enable failed");
123                 }
124                 break;
125
126         case BT_CMD_MODULE_CFG_REQ:
127                 if (priv->btmrvl_dev.sendcmdflag &&
128                                 event->data[1] == MODULE_BRINGUP_REQ) {
129                         BT_DBG("EVENT:%s",
130                                 ((event->data[2] == MODULE_BROUGHT_UP) ||
131                                 (event->data[2] == MODULE_ALREADY_UP)) ?
132                                 "Bring-up succeed" : "Bring-up failed");
133
134                         if (event->length > 3 && event->data[3])
135                                 priv->btmrvl_dev.dev_type = HCI_AMP;
136                         else
137                                 priv->btmrvl_dev.dev_type = HCI_BREDR;
138
139                         BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
140                 } else if (priv->btmrvl_dev.sendcmdflag &&
141                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
142                         BT_DBG("EVENT:%s", (event->data[2]) ?
143                                 "Shutdown failed" : "Shutdown succeed");
144                 } else {
145                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
146                         ret = -EINVAL;
147                 }
148                 break;
149
150         case BT_EVENT_POWER_STATE:
151                 if (event->data[1] == BT_PS_SLEEP)
152                         adapter->ps_state = PS_SLEEP;
153                 BT_DBG("EVENT:%s",
154                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
155                 break;
156
157         default:
158                 BT_DBG("Unknown Event=%d", event->data[0]);
159                 ret = -EINVAL;
160                 break;
161         }
162
163 exit:
164         if (!ret)
165                 kfree_skb(skb);
166
167         return ret;
168 }
169 EXPORT_SYMBOL_GPL(btmrvl_process_event);
170
171 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
172 {
173         struct sk_buff *skb;
174         struct btmrvl_cmd *cmd;
175         int ret = 0;
176
177         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
178         if (skb == NULL) {
179                 BT_ERR("No free skb");
180                 return -ENOMEM;
181         }
182
183         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
184         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ));
185         cmd->length = 1;
186         cmd->data[0] = subcmd;
187
188         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
189
190         skb->dev = (void *) priv->btmrvl_dev.hcidev;
191         skb_queue_head(&priv->adapter->tx_queue, skb);
192
193         priv->btmrvl_dev.sendcmdflag = true;
194
195         priv->adapter->cmd_complete = false;
196
197         BT_DBG("Queue module cfg Command");
198
199         wake_up_interruptible(&priv->main_thread.wait_q);
200
201         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
202                                 priv->adapter->cmd_complete,
203                                 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
204                 ret = -ETIMEDOUT;
205                 BT_ERR("module_cfg_cmd(%x): timeout: %d",
206                                         subcmd, priv->btmrvl_dev.sendcmdflag);
207         }
208
209         BT_DBG("module cfg Command done");
210
211         return ret;
212 }
213 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
214
215 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
216 {
217         struct sk_buff *skb;
218         struct btmrvl_cmd *cmd;
219
220         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
221         if (!skb) {
222                 BT_ERR("No free skb");
223                 return -ENOMEM;
224         }
225
226         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
227         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
228                                                    BT_CMD_HOST_SLEEP_CONFIG));
229         cmd->length = 2;
230         cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
231         cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
232
233         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
234
235         skb->dev = (void *) priv->btmrvl_dev.hcidev;
236         skb_queue_head(&priv->adapter->tx_queue, skb);
237
238         BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x", cmd->data[0],
239                cmd->data[1]);
240
241         return 0;
242 }
243 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
244
245 int btmrvl_enable_ps(struct btmrvl_private *priv)
246 {
247         struct sk_buff *skb;
248         struct btmrvl_cmd *cmd;
249
250         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
251         if (skb == NULL) {
252                 BT_ERR("No free skb");
253                 return -ENOMEM;
254         }
255
256         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
257         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
258                                         BT_CMD_AUTO_SLEEP_MODE));
259         cmd->length = 1;
260
261         if (priv->btmrvl_dev.psmode)
262                 cmd->data[0] = BT_PS_ENABLE;
263         else
264                 cmd->data[0] = BT_PS_DISABLE;
265
266         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
267
268         skb->dev = (void *) priv->btmrvl_dev.hcidev;
269         skb_queue_head(&priv->adapter->tx_queue, skb);
270
271         BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
272
273         return 0;
274 }
275 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
276
277 int btmrvl_enable_hs(struct btmrvl_private *priv)
278 {
279         struct sk_buff *skb;
280         struct btmrvl_cmd *cmd;
281         int ret = 0;
282
283         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
284         if (skb == NULL) {
285                 BT_ERR("No free skb");
286                 return -ENOMEM;
287         }
288
289         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
290         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE));
291         cmd->length = 0;
292
293         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
294
295         skb->dev = (void *) priv->btmrvl_dev.hcidev;
296         skb_queue_head(&priv->adapter->tx_queue, skb);
297
298         BT_DBG("Queue hs enable Command");
299
300         wake_up_interruptible(&priv->main_thread.wait_q);
301
302         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
303                         priv->adapter->hs_state,
304                         msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
305                 ret = -ETIMEDOUT;
306                 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state,
307                                                 priv->adapter->ps_state,
308                                                 priv->adapter->wakeup_tries);
309         }
310
311         return ret;
312 }
313 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
314
315 int btmrvl_prepare_command(struct btmrvl_private *priv)
316 {
317         int ret = 0;
318
319         if (priv->btmrvl_dev.hscfgcmd) {
320                 priv->btmrvl_dev.hscfgcmd = 0;
321                 btmrvl_send_hscfg_cmd(priv);
322         }
323
324         if (priv->btmrvl_dev.pscmd) {
325                 priv->btmrvl_dev.pscmd = 0;
326                 btmrvl_enable_ps(priv);
327         }
328
329         if (priv->btmrvl_dev.hscmd) {
330                 priv->btmrvl_dev.hscmd = 0;
331
332                 if (priv->btmrvl_dev.hsmode) {
333                         ret = btmrvl_enable_hs(priv);
334                 } else {
335                         ret = priv->hw_wakeup_firmware(priv);
336                         priv->adapter->hs_state = HS_DEACTIVATED;
337                 }
338         }
339
340         return ret;
341 }
342
343 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
344 {
345         int ret = 0;
346
347         if (!skb || !skb->data)
348                 return -EINVAL;
349
350         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
351                 BT_ERR("Tx Error: Bad skb length %d : %d",
352                                                 skb->len, BTM_UPLD_SIZE);
353                 return -EINVAL;
354         }
355
356         if (skb_headroom(skb) < BTM_HEADER_LEN) {
357                 struct sk_buff *tmp = skb;
358
359                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
360                 if (!skb) {
361                         BT_ERR("Tx Error: realloc_headroom failed %d",
362                                 BTM_HEADER_LEN);
363                         skb = tmp;
364                         return -EINVAL;
365                 }
366
367                 kfree_skb(tmp);
368         }
369
370         skb_push(skb, BTM_HEADER_LEN);
371
372         /* header type: byte[3]
373          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
374          * header length: byte[2][1][0]
375          */
376
377         skb->data[0] = (skb->len & 0x0000ff);
378         skb->data[1] = (skb->len & 0x00ff00) >> 8;
379         skb->data[2] = (skb->len & 0xff0000) >> 16;
380         skb->data[3] = bt_cb(skb)->pkt_type;
381
382         if (priv->hw_host_to_card)
383                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
384
385         return ret;
386 }
387
388 static void btmrvl_init_adapter(struct btmrvl_private *priv)
389 {
390         skb_queue_head_init(&priv->adapter->tx_queue);
391
392         priv->adapter->ps_state = PS_AWAKE;
393
394         init_waitqueue_head(&priv->adapter->cmd_wait_q);
395 }
396
397 static void btmrvl_free_adapter(struct btmrvl_private *priv)
398 {
399         skb_queue_purge(&priv->adapter->tx_queue);
400
401         kfree(priv->adapter);
402
403         priv->adapter = NULL;
404 }
405
406 static int btmrvl_ioctl(struct hci_dev *hdev,
407                                 unsigned int cmd, unsigned long arg)
408 {
409         return -ENOIOCTLCMD;
410 }
411
412 static int btmrvl_send_frame(struct sk_buff *skb)
413 {
414         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
415         struct btmrvl_private *priv = NULL;
416
417         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
418
419         if (!hdev) {
420                 BT_ERR("Frame for unknown HCI device");
421                 return -ENODEV;
422         }
423
424         priv = hci_get_drvdata(hdev);
425
426         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
427                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
428                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
429                                                         skb->data, skb->len);
430                 return -EBUSY;
431         }
432
433         switch (bt_cb(skb)->pkt_type) {
434         case HCI_COMMAND_PKT:
435                 hdev->stat.cmd_tx++;
436                 break;
437
438         case HCI_ACLDATA_PKT:
439                 hdev->stat.acl_tx++;
440                 break;
441
442         case HCI_SCODATA_PKT:
443                 hdev->stat.sco_tx++;
444                 break;
445         }
446
447         skb_queue_tail(&priv->adapter->tx_queue, skb);
448
449         wake_up_interruptible(&priv->main_thread.wait_q);
450
451         return 0;
452 }
453
454 static int btmrvl_flush(struct hci_dev *hdev)
455 {
456         struct btmrvl_private *priv = hci_get_drvdata(hdev);
457
458         skb_queue_purge(&priv->adapter->tx_queue);
459
460         return 0;
461 }
462
463 static int btmrvl_close(struct hci_dev *hdev)
464 {
465         struct btmrvl_private *priv = hci_get_drvdata(hdev);
466
467         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
468                 return 0;
469
470         skb_queue_purge(&priv->adapter->tx_queue);
471
472         return 0;
473 }
474
475 static int btmrvl_open(struct hci_dev *hdev)
476 {
477         set_bit(HCI_RUNNING, &hdev->flags);
478
479         return 0;
480 }
481
482 /*
483  * This function handles the event generated by firmware, rx data
484  * received from firmware, and tx data sent from kernel.
485  */
486 static int btmrvl_service_main_thread(void *data)
487 {
488         struct btmrvl_thread *thread = data;
489         struct btmrvl_private *priv = thread->priv;
490         struct btmrvl_adapter *adapter = priv->adapter;
491         wait_queue_t wait;
492         struct sk_buff *skb;
493         ulong flags;
494
495         init_waitqueue_entry(&wait, current);
496
497         for (;;) {
498                 add_wait_queue(&thread->wait_q, &wait);
499
500                 set_current_state(TASK_INTERRUPTIBLE);
501
502                 if (adapter->wakeup_tries ||
503                                 ((!adapter->int_count) &&
504                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
505                                 skb_queue_empty(&adapter->tx_queue)))) {
506                         BT_DBG("main_thread is sleeping...");
507                         schedule();
508                 }
509
510                 set_current_state(TASK_RUNNING);
511
512                 remove_wait_queue(&thread->wait_q, &wait);
513
514                 BT_DBG("main_thread woke up");
515
516                 if (kthread_should_stop()) {
517                         BT_DBG("main_thread: break from main thread");
518                         break;
519                 }
520
521                 spin_lock_irqsave(&priv->driver_lock, flags);
522                 if (adapter->int_count) {
523                         adapter->int_count = 0;
524                         spin_unlock_irqrestore(&priv->driver_lock, flags);
525                         priv->hw_process_int_status(priv);
526                 } else if (adapter->ps_state == PS_SLEEP &&
527                                         !skb_queue_empty(&adapter->tx_queue)) {
528                         spin_unlock_irqrestore(&priv->driver_lock, flags);
529                         adapter->wakeup_tries++;
530                         priv->hw_wakeup_firmware(priv);
531                         continue;
532                 } else {
533                         spin_unlock_irqrestore(&priv->driver_lock, flags);
534                 }
535
536                 if (adapter->ps_state == PS_SLEEP)
537                         continue;
538
539                 if (!priv->btmrvl_dev.tx_dnld_rdy)
540                         continue;
541
542                 skb = skb_dequeue(&adapter->tx_queue);
543                 if (skb) {
544                         if (btmrvl_tx_pkt(priv, skb))
545                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
546                         else
547                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
548
549                         kfree_skb(skb);
550                 }
551         }
552
553         return 0;
554 }
555
556 int btmrvl_register_hdev(struct btmrvl_private *priv)
557 {
558         struct hci_dev *hdev = NULL;
559         int ret;
560
561         hdev = hci_alloc_dev();
562         if (!hdev) {
563                 BT_ERR("Can not allocate HCI device");
564                 goto err_hdev;
565         }
566
567         priv->btmrvl_dev.hcidev = hdev;
568         hci_set_drvdata(hdev, priv);
569
570         hdev->bus = HCI_SDIO;
571         hdev->open = btmrvl_open;
572         hdev->close = btmrvl_close;
573         hdev->flush = btmrvl_flush;
574         hdev->send = btmrvl_send_frame;
575         hdev->ioctl = btmrvl_ioctl;
576
577         btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
578
579         hdev->dev_type = priv->btmrvl_dev.dev_type;
580
581         ret = hci_register_dev(hdev);
582         if (ret < 0) {
583                 BT_ERR("Can not register HCI device");
584                 goto err_hci_register_dev;
585         }
586
587 #ifdef CONFIG_DEBUG_FS
588         btmrvl_debugfs_init(hdev);
589 #endif
590
591         return 0;
592
593 err_hci_register_dev:
594         hci_free_dev(hdev);
595
596 err_hdev:
597         /* Stop the thread servicing the interrupts */
598         kthread_stop(priv->main_thread.task);
599
600         btmrvl_free_adapter(priv);
601         kfree(priv);
602
603         return -ENOMEM;
604 }
605 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
606
607 struct btmrvl_private *btmrvl_add_card(void *card)
608 {
609         struct btmrvl_private *priv;
610
611         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
612         if (!priv) {
613                 BT_ERR("Can not allocate priv");
614                 goto err_priv;
615         }
616
617         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
618         if (!priv->adapter) {
619                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
620                 goto err_adapter;
621         }
622
623         btmrvl_init_adapter(priv);
624
625         BT_DBG("Starting kthread...");
626         priv->main_thread.priv = priv;
627         spin_lock_init(&priv->driver_lock);
628
629         init_waitqueue_head(&priv->main_thread.wait_q);
630         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
631                                 &priv->main_thread, "btmrvl_main_service");
632
633         priv->btmrvl_dev.card = card;
634         priv->btmrvl_dev.tx_dnld_rdy = true;
635
636         return priv;
637
638 err_adapter:
639         kfree(priv);
640
641 err_priv:
642         return NULL;
643 }
644 EXPORT_SYMBOL_GPL(btmrvl_add_card);
645
646 int btmrvl_remove_card(struct btmrvl_private *priv)
647 {
648         struct hci_dev *hdev;
649
650         hdev = priv->btmrvl_dev.hcidev;
651
652         wake_up_interruptible(&priv->adapter->cmd_wait_q);
653
654         kthread_stop(priv->main_thread.task);
655
656 #ifdef CONFIG_DEBUG_FS
657         btmrvl_debugfs_remove(hdev);
658 #endif
659
660         hci_unregister_dev(hdev);
661
662         hci_free_dev(hdev);
663
664         priv->btmrvl_dev.hcidev = NULL;
665
666         btmrvl_free_adapter(priv);
667
668         kfree(priv);
669
670         return 0;
671 }
672 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
673
674 MODULE_AUTHOR("Marvell International Ltd.");
675 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
676 MODULE_VERSION(VERSION);
677 MODULE_LICENSE("GPL v2");