Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
[linux-2.6.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 <net/bluetooth/bluetooth.h>
22 #include <net/bluetooth/hci_core.h>
23
24 #include "btmrvl_drv.h"
25
26 #define VERSION "1.0"
27
28 /*
29  * This function is called by interface specific interrupt handler.
30  * It updates Power Save & Host Sleep states, and wakes up the main
31  * thread.
32  */
33 void btmrvl_interrupt(struct btmrvl_private *priv)
34 {
35         priv->adapter->ps_state = PS_AWAKE;
36
37         priv->adapter->wakeup_tries = 0;
38
39         priv->adapter->int_count++;
40
41         wake_up_interruptible(&priv->main_thread.wait_q);
42 }
43 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
44
45 void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
46 {
47         struct hci_event_hdr *hdr = (void *) skb->data;
48         struct hci_ev_cmd_complete *ec;
49         u16 opcode, ocf;
50
51         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
52                 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
53                 opcode = __le16_to_cpu(ec->opcode);
54                 ocf = hci_opcode_ocf(opcode);
55                 if (ocf == BT_CMD_MODULE_CFG_REQ &&
56                                         priv->btmrvl_dev.sendcmdflag) {
57                         priv->btmrvl_dev.sendcmdflag = false;
58                         priv->adapter->cmd_complete = true;
59                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
60                 }
61         }
62 }
63 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
64
65 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
66 {
67         struct btmrvl_adapter *adapter = priv->adapter;
68         struct btmrvl_event *event;
69         u8 ret = 0;
70
71         event = (struct btmrvl_event *) skb->data;
72         if (event->ec != 0xff) {
73                 BT_DBG("Not Marvell Event=%x", event->ec);
74                 ret = -EINVAL;
75                 goto exit;
76         }
77
78         switch (event->data[0]) {
79         case BT_CMD_AUTO_SLEEP_MODE:
80                 if (!event->data[2]) {
81                         if (event->data[1] == BT_PS_ENABLE)
82                                 adapter->psmode = 1;
83                         else
84                                 adapter->psmode = 0;
85                         BT_DBG("PS Mode:%s",
86                                 (adapter->psmode) ? "Enable" : "Disable");
87                 } else {
88                         BT_DBG("PS Mode command failed");
89                 }
90                 break;
91
92         case BT_CMD_HOST_SLEEP_CONFIG:
93                 if (!event->data[3])
94                         BT_DBG("gpio=%x, gap=%x", event->data[1],
95                                                         event->data[2]);
96                 else
97                         BT_DBG("HSCFG command failed");
98                 break;
99
100         case BT_CMD_HOST_SLEEP_ENABLE:
101                 if (!event->data[1]) {
102                         adapter->hs_state = HS_ACTIVATED;
103                         if (adapter->psmode)
104                                 adapter->ps_state = PS_SLEEP;
105                         wake_up_interruptible(&adapter->cmd_wait_q);
106                         BT_DBG("HS ACTIVATED!");
107                 } else {
108                         BT_DBG("HS Enable failed");
109                 }
110                 break;
111
112         case BT_CMD_MODULE_CFG_REQ:
113                 if (priv->btmrvl_dev.sendcmdflag &&
114                                 event->data[1] == MODULE_BRINGUP_REQ) {
115                         BT_DBG("EVENT:%s", (event->data[2]) ?
116                                 "Bring-up failed" : "Bring-up succeed");
117                 } else if (priv->btmrvl_dev.sendcmdflag &&
118                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
119                         BT_DBG("EVENT:%s", (event->data[2]) ?
120                                 "Shutdown failed" : "Shutdown succeed");
121                 } else {
122                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
123                         ret = -EINVAL;
124                 }
125                 break;
126
127         case BT_EVENT_POWER_STATE:
128                 if (event->data[1] == BT_PS_SLEEP)
129                         adapter->ps_state = PS_SLEEP;
130                 BT_DBG("EVENT:%s",
131                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
132                 break;
133
134         default:
135                 BT_DBG("Unknown Event=%d", event->data[0]);
136                 ret = -EINVAL;
137                 break;
138         }
139
140 exit:
141         if (!ret)
142                 kfree_skb(skb);
143
144         return ret;
145 }
146 EXPORT_SYMBOL_GPL(btmrvl_process_event);
147
148 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
149 {
150         struct sk_buff *skb;
151         struct btmrvl_cmd *cmd;
152         int ret = 0;
153
154         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
155         if (skb == NULL) {
156                 BT_ERR("No free skb");
157                 return -ENOMEM;
158         }
159
160         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
161         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ));
162         cmd->length = 1;
163         cmd->data[0] = subcmd;
164
165         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
166
167         skb->dev = (void *) priv->btmrvl_dev.hcidev;
168         skb_queue_head(&priv->adapter->tx_queue, skb);
169
170         priv->btmrvl_dev.sendcmdflag = true;
171
172         priv->adapter->cmd_complete = false;
173
174         BT_DBG("Queue module cfg Command");
175
176         wake_up_interruptible(&priv->main_thread.wait_q);
177
178         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
179                                 priv->adapter->cmd_complete,
180                                 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
181                 ret = -ETIMEDOUT;
182                 BT_ERR("module_cfg_cmd(%x): timeout: %d",
183                                         subcmd, priv->btmrvl_dev.sendcmdflag);
184         }
185
186         BT_DBG("module cfg Command done");
187
188         return ret;
189 }
190 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
191
192 int btmrvl_enable_ps(struct btmrvl_private *priv)
193 {
194         struct sk_buff *skb;
195         struct btmrvl_cmd *cmd;
196
197         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
198         if (skb == NULL) {
199                 BT_ERR("No free skb");
200                 return -ENOMEM;
201         }
202
203         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
204         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
205                                         BT_CMD_AUTO_SLEEP_MODE));
206         cmd->length = 1;
207
208         if (priv->btmrvl_dev.psmode)
209                 cmd->data[0] = BT_PS_ENABLE;
210         else
211                 cmd->data[0] = BT_PS_DISABLE;
212
213         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
214
215         skb->dev = (void *) priv->btmrvl_dev.hcidev;
216         skb_queue_head(&priv->adapter->tx_queue, skb);
217
218         BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
219
220         return 0;
221 }
222 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
223
224 static int btmrvl_enable_hs(struct btmrvl_private *priv)
225 {
226         struct sk_buff *skb;
227         struct btmrvl_cmd *cmd;
228         int ret = 0;
229
230         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
231         if (skb == NULL) {
232                 BT_ERR("No free skb");
233                 return -ENOMEM;
234         }
235
236         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
237         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE));
238         cmd->length = 0;
239
240         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
241
242         skb->dev = (void *) priv->btmrvl_dev.hcidev;
243         skb_queue_head(&priv->adapter->tx_queue, skb);
244
245         BT_DBG("Queue hs enable Command");
246
247         wake_up_interruptible(&priv->main_thread.wait_q);
248
249         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
250                         priv->adapter->hs_state,
251                         msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
252                 ret = -ETIMEDOUT;
253                 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state,
254                                                 priv->adapter->ps_state,
255                                                 priv->adapter->wakeup_tries);
256         }
257
258         return ret;
259 }
260
261 int btmrvl_prepare_command(struct btmrvl_private *priv)
262 {
263         struct sk_buff *skb = NULL;
264         struct btmrvl_cmd *cmd;
265         int ret = 0;
266
267         if (priv->btmrvl_dev.hscfgcmd) {
268                 priv->btmrvl_dev.hscfgcmd = 0;
269
270                 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
271                 if (skb == NULL) {
272                         BT_ERR("No free skb");
273                         return -ENOMEM;
274                 }
275
276                 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
277                 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG));
278                 cmd->length = 2;
279                 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
280                 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
281
282                 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
283
284                 skb->dev = (void *) priv->btmrvl_dev.hcidev;
285                 skb_queue_head(&priv->adapter->tx_queue, skb);
286
287                 BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x",
288                                                 cmd->data[0], cmd->data[1]);
289         }
290
291         if (priv->btmrvl_dev.pscmd) {
292                 priv->btmrvl_dev.pscmd = 0;
293                 btmrvl_enable_ps(priv);
294         }
295
296         if (priv->btmrvl_dev.hscmd) {
297                 priv->btmrvl_dev.hscmd = 0;
298
299                 if (priv->btmrvl_dev.hsmode) {
300                         ret = btmrvl_enable_hs(priv);
301                 } else {
302                         ret = priv->hw_wakeup_firmware(priv);
303                         priv->adapter->hs_state = HS_DEACTIVATED;
304                 }
305         }
306
307         return ret;
308 }
309
310 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
311 {
312         int ret = 0;
313
314         if (!skb || !skb->data)
315                 return -EINVAL;
316
317         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
318                 BT_ERR("Tx Error: Bad skb length %d : %d",
319                                                 skb->len, BTM_UPLD_SIZE);
320                 return -EINVAL;
321         }
322
323         if (skb_headroom(skb) < BTM_HEADER_LEN) {
324                 struct sk_buff *tmp = skb;
325
326                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
327                 if (!skb) {
328                         BT_ERR("Tx Error: realloc_headroom failed %d",
329                                 BTM_HEADER_LEN);
330                         skb = tmp;
331                         return -EINVAL;
332                 }
333
334                 kfree_skb(tmp);
335         }
336
337         skb_push(skb, BTM_HEADER_LEN);
338
339         /* header type: byte[3]
340          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
341          * header length: byte[2][1][0]
342          */
343
344         skb->data[0] = (skb->len & 0x0000ff);
345         skb->data[1] = (skb->len & 0x00ff00) >> 8;
346         skb->data[2] = (skb->len & 0xff0000) >> 16;
347         skb->data[3] = bt_cb(skb)->pkt_type;
348
349         if (priv->hw_host_to_card)
350                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
351
352         return ret;
353 }
354
355 static void btmrvl_init_adapter(struct btmrvl_private *priv)
356 {
357         skb_queue_head_init(&priv->adapter->tx_queue);
358
359         priv->adapter->ps_state = PS_AWAKE;
360
361         init_waitqueue_head(&priv->adapter->cmd_wait_q);
362 }
363
364 static void btmrvl_free_adapter(struct btmrvl_private *priv)
365 {
366         skb_queue_purge(&priv->adapter->tx_queue);
367
368         kfree(priv->adapter);
369
370         priv->adapter = NULL;
371 }
372
373 static int btmrvl_ioctl(struct hci_dev *hdev,
374                                 unsigned int cmd, unsigned long arg)
375 {
376         return -ENOIOCTLCMD;
377 }
378
379 static void btmrvl_destruct(struct hci_dev *hdev)
380 {
381 }
382
383 static int btmrvl_send_frame(struct sk_buff *skb)
384 {
385         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
386         struct btmrvl_private *priv = NULL;
387
388         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
389
390         if (!hdev || !hdev->driver_data) {
391                 BT_ERR("Frame for unknown HCI device");
392                 return -ENODEV;
393         }
394
395         priv = (struct btmrvl_private *) hdev->driver_data;
396         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
397                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
398                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
399                                                         skb->data, skb->len);
400                 return -EBUSY;
401         }
402
403         switch (bt_cb(skb)->pkt_type) {
404         case HCI_COMMAND_PKT:
405                 hdev->stat.cmd_tx++;
406                 break;
407
408         case HCI_ACLDATA_PKT:
409                 hdev->stat.acl_tx++;
410                 break;
411
412         case HCI_SCODATA_PKT:
413                 hdev->stat.sco_tx++;
414                 break;
415         }
416
417         skb_queue_tail(&priv->adapter->tx_queue, skb);
418
419         wake_up_interruptible(&priv->main_thread.wait_q);
420
421         return 0;
422 }
423
424 static int btmrvl_flush(struct hci_dev *hdev)
425 {
426         struct btmrvl_private *priv = hdev->driver_data;
427
428         skb_queue_purge(&priv->adapter->tx_queue);
429
430         return 0;
431 }
432
433 static int btmrvl_close(struct hci_dev *hdev)
434 {
435         struct btmrvl_private *priv = hdev->driver_data;
436
437         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
438                 return 0;
439
440         skb_queue_purge(&priv->adapter->tx_queue);
441
442         return 0;
443 }
444
445 static int btmrvl_open(struct hci_dev *hdev)
446 {
447         set_bit(HCI_RUNNING, &hdev->flags);
448
449         return 0;
450 }
451
452 /*
453  * This function handles the event generated by firmware, rx data
454  * received from firmware, and tx data sent from kernel.
455  */
456 static int btmrvl_service_main_thread(void *data)
457 {
458         struct btmrvl_thread *thread = data;
459         struct btmrvl_private *priv = thread->priv;
460         struct btmrvl_adapter *adapter = priv->adapter;
461         wait_queue_t wait;
462         struct sk_buff *skb;
463         ulong flags;
464
465         init_waitqueue_entry(&wait, current);
466
467         current->flags |= PF_NOFREEZE;
468
469         for (;;) {
470                 add_wait_queue(&thread->wait_q, &wait);
471
472                 set_current_state(TASK_INTERRUPTIBLE);
473
474                 if (adapter->wakeup_tries ||
475                                 ((!adapter->int_count) &&
476                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
477                                 skb_queue_empty(&adapter->tx_queue)))) {
478                         BT_DBG("main_thread is sleeping...");
479                         schedule();
480                 }
481
482                 set_current_state(TASK_RUNNING);
483
484                 remove_wait_queue(&thread->wait_q, &wait);
485
486                 BT_DBG("main_thread woke up");
487
488                 if (kthread_should_stop()) {
489                         BT_DBG("main_thread: break from main thread");
490                         break;
491                 }
492
493                 spin_lock_irqsave(&priv->driver_lock, flags);
494                 if (adapter->int_count) {
495                         adapter->int_count = 0;
496                 } else if (adapter->ps_state == PS_SLEEP &&
497                                         !skb_queue_empty(&adapter->tx_queue)) {
498                         spin_unlock_irqrestore(&priv->driver_lock, flags);
499                         adapter->wakeup_tries++;
500                         priv->hw_wakeup_firmware(priv);
501                         continue;
502                 }
503                 spin_unlock_irqrestore(&priv->driver_lock, flags);
504
505                 if (adapter->ps_state == PS_SLEEP)
506                         continue;
507
508                 if (!priv->btmrvl_dev.tx_dnld_rdy)
509                         continue;
510
511                 skb = skb_dequeue(&adapter->tx_queue);
512                 if (skb) {
513                         if (btmrvl_tx_pkt(priv, skb))
514                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
515                         else
516                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
517
518                         kfree_skb(skb);
519                 }
520         }
521
522         return 0;
523 }
524
525 struct btmrvl_private *btmrvl_add_card(void *card)
526 {
527         struct hci_dev *hdev = NULL;
528         struct btmrvl_private *priv;
529         int ret;
530
531         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
532         if (!priv) {
533                 BT_ERR("Can not allocate priv");
534                 goto err_priv;
535         }
536
537         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
538         if (!priv->adapter) {
539                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
540                 goto err_adapter;
541         }
542
543         btmrvl_init_adapter(priv);
544
545         hdev = hci_alloc_dev();
546         if (!hdev) {
547                 BT_ERR("Can not allocate HCI device");
548                 goto err_hdev;
549         }
550
551         BT_DBG("Starting kthread...");
552         priv->main_thread.priv = priv;
553         spin_lock_init(&priv->driver_lock);
554
555         init_waitqueue_head(&priv->main_thread.wait_q);
556         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
557                                 &priv->main_thread, "btmrvl_main_service");
558
559         priv->btmrvl_dev.hcidev = hdev;
560         priv->btmrvl_dev.card = card;
561
562         hdev->driver_data = priv;
563
564         priv->btmrvl_dev.tx_dnld_rdy = true;
565
566         hdev->type = HCI_SDIO;
567         hdev->open = btmrvl_open;
568         hdev->close = btmrvl_close;
569         hdev->flush = btmrvl_flush;
570         hdev->send = btmrvl_send_frame;
571         hdev->destruct = btmrvl_destruct;
572         hdev->ioctl = btmrvl_ioctl;
573         hdev->owner = THIS_MODULE;
574
575         ret = hci_register_dev(hdev);
576         if (ret < 0) {
577                 BT_ERR("Can not register HCI device");
578                 goto err_hci_register_dev;
579         }
580
581 #ifdef CONFIG_DEBUG_FS
582         btmrvl_debugfs_init(hdev);
583 #endif
584
585         return priv;
586
587 err_hci_register_dev:
588         /* Stop the thread servicing the interrupts */
589         kthread_stop(priv->main_thread.task);
590
591         hci_free_dev(hdev);
592
593 err_hdev:
594         btmrvl_free_adapter(priv);
595
596 err_adapter:
597         kfree(priv);
598
599 err_priv:
600         return NULL;
601 }
602 EXPORT_SYMBOL_GPL(btmrvl_add_card);
603
604 int btmrvl_remove_card(struct btmrvl_private *priv)
605 {
606         struct hci_dev *hdev;
607
608         hdev = priv->btmrvl_dev.hcidev;
609
610         wake_up_interruptible(&priv->adapter->cmd_wait_q);
611
612         kthread_stop(priv->main_thread.task);
613
614 #ifdef CONFIG_DEBUG_FS
615         btmrvl_debugfs_remove(hdev);
616 #endif
617
618         hci_unregister_dev(hdev);
619
620         hci_free_dev(hdev);
621
622         priv->btmrvl_dev.hcidev = NULL;
623
624         btmrvl_free_adapter(priv);
625
626         kfree(priv);
627
628         return 0;
629 }
630 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
631
632 MODULE_AUTHOR("Marvell International Ltd.");
633 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
634 MODULE_VERSION(VERSION);
635 MODULE_LICENSE("GPL v2");