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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / net / bluetooth / hidp / core.c
blob292e619db8961c82e7c3aa7f3280cb4236176ab8
1 /*
2 HIDP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
4 Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License version 2 as
8 published by the Free Software Foundation;
9
10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
11 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
13 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
14 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
15 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18
19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
21 SOFTWARE IS DISCLAIMED.
22 */
23
24 #include <linux/kref.h>
25 #include <linux/module.h>
26 #include <linux/file.h>
27 #include <linux/kthread.h>
28 #include <linux/hidraw.h>
29
30 #include <net/bluetooth/bluetooth.h>
31 #include <net/bluetooth/hci_core.h>
32 #include <net/bluetooth/l2cap.h>
33
34 #include "hidp.h"
35
36 #define VERSION "1.2"
37
38 static DECLARE_RWSEM(hidp_session_sem);
39 static LIST_HEAD(hidp_session_list);
40
41 static unsigned char hidp_keycode[256] = {
42 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36,
43 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45,
44 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1,
45 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52,
46 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88,
47 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69,
48 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73,
49 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190,
50 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135,
51 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94,
52 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0,
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
58 29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115,
59 114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140
60 };
61
62 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
63
64 static int hidp_session_probe(struct l2cap_conn *conn,
65 struct l2cap_user *user);
66 static void hidp_session_remove(struct l2cap_conn *conn,
67 struct l2cap_user *user);
68 static int hidp_session_thread(void *arg);
69 static void hidp_session_terminate(struct hidp_session *s);
70
71 static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
72 {
73 memset(ci, 0, sizeof(*ci));
74 bacpy(&ci->bdaddr, &session->bdaddr);
75
76 ci->flags = session->flags;
77 ci->state = BT_CONNECTED;
78
79 if (session->input) {
80 ci->vendor = session->input->id.vendor;
81 ci->product = session->input->id.product;
82 ci->version = session->input->id.version;
83 if (session->input->name)
84 strlcpy(ci->name, session->input->name, 128);
85 else
86 strlcpy(ci->name, "HID Boot Device", 128);
87 } else if (session->hid) {
88 ci->vendor = session->hid->vendor;
89 ci->product = session->hid->product;
90 ci->version = session->hid->version;
91 strlcpy(ci->name, session->hid->name, 128);
92 }
93 }
94
95 /* assemble skb, queue message on @transmit and wake up the session thread */
96 static int hidp_send_message(struct hidp_session *session, struct socket *sock,
97 struct sk_buff_head *transmit, unsigned char hdr,
98 const unsigned char *data, int size)
99 {
100 struct sk_buff *skb;
101 struct sock *sk = sock->sk;
102
103 BT_DBG("session %p data %p size %d", session, data, size);
104
105 if (atomic_read(&session->terminate))
106 return -EIO;
107
108 skb = alloc_skb(size + 1, GFP_ATOMIC);
109 if (!skb) {
110 BT_ERR("Can't allocate memory for new frame");
111 return -ENOMEM;
112 }
113
114 *skb_put(skb, 1) = hdr;
115 if (data && size > 0)
116 memcpy(skb_put(skb, size), data, size);
117
118 skb_queue_tail(transmit, skb);
119 wake_up_interruptible(sk_sleep(sk));
120
121 return 0;
122 }
123
124 static int hidp_send_ctrl_message(struct hidp_session *session,
125 unsigned char hdr, const unsigned char *data,
126 int size)
127 {
128 return hidp_send_message(session, session->ctrl_sock,
129 &session->ctrl_transmit, hdr, data, size);
130 }
131
132 static int hidp_send_intr_message(struct hidp_session *session,
133 unsigned char hdr, const unsigned char *data,
134 int size)
135 {
136 return hidp_send_message(session, session->intr_sock,
137 &session->intr_transmit, hdr, data, size);
138 }
139
140 static int hidp_input_event(struct input_dev *dev, unsigned int type,
141 unsigned int code, int value)
142 {
143 struct hidp_session *session = input_get_drvdata(dev);
144 unsigned char newleds;
145 unsigned char hdr, data[2];
146
147 BT_DBG("session %p type %d code %d value %d",
148 session, type, code, value);
149
150 if (type != EV_LED)
151 return -1;
152
153 newleds = (!!test_bit(LED_KANA, dev->led) << 3) |
154 (!!test_bit(LED_COMPOSE, dev->led) << 3) |
155 (!!test_bit(LED_SCROLLL, dev->led) << 2) |
156 (!!test_bit(LED_CAPSL, dev->led) << 1) |
157 (!!test_bit(LED_NUML, dev->led));
158
159 if (session->leds == newleds)
160 return 0;
161
162 session->leds = newleds;
163
164 hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
165 data[0] = 0x01;
166 data[1] = newleds;
167
168 return hidp_send_intr_message(session, hdr, data, 2);
169 }
170
171 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
172 {
173 struct input_dev *dev = session->input;
174 unsigned char *keys = session->keys;
175 unsigned char *udata = skb->data + 1;
176 signed char *sdata = skb->data + 1;
177 int i, size = skb->len - 1;
178
179 switch (skb->data[0]) {
180 case 0x01: /* Keyboard report */
181 for (i = 0; i < 8; i++)
182 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
183
184 /* If all the key codes have been set to 0x01, it means
185 * too many keys were pressed at the same time. */
186 if (!memcmp(udata + 2, hidp_mkeyspat, 6))
187 break;
188
189 for (i = 2; i < 8; i++) {
190 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
191 if (hidp_keycode[keys[i]])
192 input_report_key(dev, hidp_keycode[keys[i]], 0);
193 else
194 BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
195 }
196
197 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
198 if (hidp_keycode[udata[i]])
199 input_report_key(dev, hidp_keycode[udata[i]], 1);
200 else
201 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
202 }
203 }
204
205 memcpy(keys, udata, 8);
206 break;
207
208 case 0x02: /* Mouse report */
209 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01);
210 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02);
211 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
212 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08);
213 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10);
214
215 input_report_rel(dev, REL_X, sdata[1]);
216 input_report_rel(dev, REL_Y, sdata[2]);
217
218 if (size > 3)
219 input_report_rel(dev, REL_WHEEL, sdata[3]);
220 break;
221 }
222
223 input_sync(dev);
224 }
225
226 static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
227 {
228 unsigned char hdr;
229 u8 *buf;
230 int rsize, ret;
231
232 buf = hid_alloc_report_buf(report, GFP_ATOMIC);
233 if (!buf)
234 return -EIO;
235
236 hid_output_report(report, buf);
237 hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
238
239 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
240 ret = hidp_send_intr_message(session, hdr, buf, rsize);
241
242 kfree(buf);
243 return ret;
244 }
245
246 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type,
247 unsigned int code, int value)
248 {
249 struct hid_device *hid = input_get_drvdata(dev);
250 struct hidp_session *session = hid->driver_data;
251 struct hid_field *field;
252 int offset;
253
254 BT_DBG("session %p type %d code %d value %d",
255 session, type, code, value);
256
257 if (type != EV_LED)
258 return -1;
259
260 offset = hidinput_find_field(hid, type, code, &field);
261 if (offset == -1) {
262 hid_warn(dev, "event field not found\n");
263 return -1;
264 }
265
266 hid_set_field(field, offset, value);
267
268 return hidp_send_report(session, field->report);
269 }
270
271 static int hidp_get_raw_report(struct hid_device *hid,
272 unsigned char report_number,
273 unsigned char *data, size_t count,
274 unsigned char report_type)
275 {
276 struct hidp_session *session = hid->driver_data;
277 struct sk_buff *skb;
278 size_t len;
279 int numbered_reports = hid->report_enum[report_type].numbered;
280 int ret;
281
282 if (atomic_read(&session->terminate))
283 return -EIO;
284
285 switch (report_type) {
286 case HID_FEATURE_REPORT:
287 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE;
288 break;
289 case HID_INPUT_REPORT:
290 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT;
291 break;
292 case HID_OUTPUT_REPORT:
293 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT;
294 break;
295 default:
296 return -EINVAL;
297 }
298
299 if (mutex_lock_interruptible(&session->report_mutex))
300 return -ERESTARTSYS;
301
302 /* Set up our wait, and send the report request to the device. */
303 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK;
304 session->waiting_report_number = numbered_reports ? report_number : -1;
305 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
306 data[0] = report_number;
307 ret = hidp_send_ctrl_message(session, report_type, data, 1);
308 if (ret)
309 goto err;
310
311 /* Wait for the return of the report. The returned report
312 gets put in session->report_return. */
313 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
314 !atomic_read(&session->terminate)) {
315 int res;
316
317 res = wait_event_interruptible_timeout(session->report_queue,
318 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)
319 || atomic_read(&session->terminate),
320 5*HZ);
321 if (res == 0) {
322 /* timeout */
323 ret = -EIO;
324 goto err;
325 }
326 if (res < 0) {
327 /* signal */
328 ret = -ERESTARTSYS;
329 goto err;
330 }
331 }
332
333 skb = session->report_return;
334 if (skb) {
335 len = skb->len < count ? skb->len : count;
336 memcpy(data, skb->data, len);
337
338 kfree_skb(skb);
339 session->report_return = NULL;
340 } else {
341 /* Device returned a HANDSHAKE, indicating protocol error. */
342 len = -EIO;
343 }
344
345 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
346 mutex_unlock(&session->report_mutex);
347
348 return len;
349
350 err:
351 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
352 mutex_unlock(&session->report_mutex);
353 return ret;
354 }
355
356 static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
357 unsigned char report_type)
358 {
359 struct hidp_session *session = hid->driver_data;
360 int ret;
361
362 if (report_type == HID_OUTPUT_REPORT) {
363 report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
364 return hidp_send_intr_message(session, report_type,
365 data, count);
366 } else if (report_type != HID_FEATURE_REPORT) {
367 return -EINVAL;
368 }
369
370 if (mutex_lock_interruptible(&session->report_mutex))
371 return -ERESTARTSYS;
372
373 /* Set up our wait, and send the report request to the device. */
374 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
375 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
376 ret = hidp_send_ctrl_message(session, report_type, data, count);
377 if (ret)
378 goto err;
379
380 /* Wait for the ACK from the device. */
381 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) &&
382 !atomic_read(&session->terminate)) {
383 int res;
384
385 res = wait_event_interruptible_timeout(session->report_queue,
386 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)
387 || atomic_read(&session->terminate),
388 10*HZ);
389 if (res == 0) {
390 /* timeout */
391 ret = -EIO;
392 goto err;
393 }
394 if (res < 0) {
395 /* signal */
396 ret = -ERESTARTSYS;
397 goto err;
398 }
399 }
400
401 if (!session->output_report_success) {
402 ret = -EIO;
403 goto err;
404 }
405
406 ret = count;
407
408 err:
409 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
410 mutex_unlock(&session->report_mutex);
411 return ret;
412 }
413
414 static void hidp_idle_timeout(unsigned long arg)
415 {
416 struct hidp_session *session = (struct hidp_session *) arg;
417
418 hidp_session_terminate(session);
419 }
420
421 static void hidp_set_timer(struct hidp_session *session)
422 {
423 if (session->idle_to > 0)
424 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
425 }
426
427 static void hidp_del_timer(struct hidp_session *session)
428 {
429 if (session->idle_to > 0)
430 del_timer(&session->timer);
431 }
432
433 static void hidp_process_handshake(struct hidp_session *session,
434 unsigned char param)
435 {
436 BT_DBG("session %p param 0x%02x", session, param);
437 session->output_report_success = 0; /* default condition */
438
439 switch (param) {
440 case HIDP_HSHK_SUCCESSFUL:
441 /* FIXME: Call into SET_ GET_ handlers here */
442 session->output_report_success = 1;
443 break;
444
445 case HIDP_HSHK_NOT_READY:
446 case HIDP_HSHK_ERR_INVALID_REPORT_ID:
447 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
448 case HIDP_HSHK_ERR_INVALID_PARAMETER:
449 if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags))
450 wake_up_interruptible(&session->report_queue);
451
452 /* FIXME: Call into SET_ GET_ handlers here */
453 break;
454
455 case HIDP_HSHK_ERR_UNKNOWN:
456 break;
457
458 case HIDP_HSHK_ERR_FATAL:
459 /* Device requests a reboot, as this is the only way this error
460 * can be recovered. */
461 hidp_send_ctrl_message(session,
462 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
463 break;
464
465 default:
466 hidp_send_ctrl_message(session,
467 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
468 break;
469 }
470
471 /* Wake up the waiting thread. */
472 if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags))
473 wake_up_interruptible(&session->report_queue);
474 }
475
476 static void hidp_process_hid_control(struct hidp_session *session,
477 unsigned char param)
478 {
479 BT_DBG("session %p param 0x%02x", session, param);
480
481 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
482 /* Flush the transmit queues */
483 skb_queue_purge(&session->ctrl_transmit);
484 skb_queue_purge(&session->intr_transmit);
485
486 hidp_session_terminate(session);
487 }
488 }
489
490 /* Returns true if the passed-in skb should be freed by the caller. */
491 static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
492 unsigned char param)
493 {
494 int done_with_skb = 1;
495 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
496
497 switch (param) {
498 case HIDP_DATA_RTYPE_INPUT:
499 hidp_set_timer(session);
500
501 if (session->input)
502 hidp_input_report(session, skb);
503
504 if (session->hid)
505 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
506 break;
507
508 case HIDP_DATA_RTYPE_OTHER:
509 case HIDP_DATA_RTYPE_OUPUT:
510 case HIDP_DATA_RTYPE_FEATURE:
511 break;
512
513 default:
514 hidp_send_ctrl_message(session,
515 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
516 }
517
518 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
519 param == session->waiting_report_type) {
520 if (session->waiting_report_number < 0 ||
521 session->waiting_report_number == skb->data[0]) {
522 /* hidp_get_raw_report() is waiting on this report. */
523 session->report_return = skb;
524 done_with_skb = 0;
525 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
526 wake_up_interruptible(&session->report_queue);
527 }
528 }
529
530 return done_with_skb;
531 }
532
533 static void hidp_recv_ctrl_frame(struct hidp_session *session,
534 struct sk_buff *skb)
535 {
536 unsigned char hdr, type, param;
537 int free_skb = 1;
538
539 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
540
541 hdr = skb->data[0];
542 skb_pull(skb, 1);
543
544 type = hdr & HIDP_HEADER_TRANS_MASK;
545 param = hdr & HIDP_HEADER_PARAM_MASK;
546
547 switch (type) {
548 case HIDP_TRANS_HANDSHAKE:
549 hidp_process_handshake(session, param);
550 break;
551
552 case HIDP_TRANS_HID_CONTROL:
553 hidp_process_hid_control(session, param);
554 break;
555
556 case HIDP_TRANS_DATA:
557 free_skb = hidp_process_data(session, skb, param);
558 break;
559
560 default:
561 hidp_send_ctrl_message(session,
562 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
563 break;
564 }
565
566 if (free_skb)
567 kfree_skb(skb);
568 }
569
570 static void hidp_recv_intr_frame(struct hidp_session *session,
571 struct sk_buff *skb)
572 {
573 unsigned char hdr;
574
575 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
576
577 hdr = skb->data[0];
578 skb_pull(skb, 1);
579
580 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
581 hidp_set_timer(session);
582
583 if (session->input)
584 hidp_input_report(session, skb);
585
586 if (session->hid) {
587 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
588 BT_DBG("report len %d", skb->len);
589 }
590 } else {
591 BT_DBG("Unsupported protocol header 0x%02x", hdr);
592 }
593
594 kfree_skb(skb);
595 }
596
597 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
598 {
599 struct kvec iv = { data, len };
600 struct msghdr msg;
601
602 BT_DBG("sock %p data %p len %d", sock, data, len);
603
604 if (!len)
605 return 0;
606
607 memset(&msg, 0, sizeof(msg));
608
609 return kernel_sendmsg(sock, &msg, &iv, 1, len);
610 }
611
612 /* dequeue message from @transmit and send via @sock */
613 static void hidp_process_transmit(struct hidp_session *session,
614 struct sk_buff_head *transmit,
615 struct socket *sock)
616 {
617 struct sk_buff *skb;
618 int ret;
619
620 BT_DBG("session %p", session);
621
622 while ((skb = skb_dequeue(transmit))) {
623 ret = hidp_send_frame(sock, skb->data, skb->len);
624 if (ret == -EAGAIN) {
625 skb_queue_head(transmit, skb);
626 break;
627 } else if (ret < 0) {
628 hidp_session_terminate(session);
629 kfree_skb(skb);
630 break;
631 }
632
633 hidp_set_timer(session);
634 kfree_skb(skb);
635 }
636 }
637
638 static int hidp_setup_input(struct hidp_session *session,
639 struct hidp_connadd_req *req)
640 {
641 struct input_dev *input;
642 int i;
643
644 input = input_allocate_device();
645 if (!input)
646 return -ENOMEM;
647
648 session->input = input;
649
650 input_set_drvdata(input, session);
651
652 input->name = "Bluetooth HID Boot Protocol Device";
653
654 input->id.bustype = BUS_BLUETOOTH;
655 input->id.vendor = req->vendor;
656 input->id.product = req->product;
657 input->id.version = req->version;
658
659 if (req->subclass & 0x40) {
660 set_bit(EV_KEY, input->evbit);
661 set_bit(EV_LED, input->evbit);
662 set_bit(EV_REP, input->evbit);
663
664 set_bit(LED_NUML, input->ledbit);
665 set_bit(LED_CAPSL, input->ledbit);
666 set_bit(LED_SCROLLL, input->ledbit);
667 set_bit(LED_COMPOSE, input->ledbit);
668 set_bit(LED_KANA, input->ledbit);
669
670 for (i = 0; i < sizeof(hidp_keycode); i++)
671 set_bit(hidp_keycode[i], input->keybit);
672 clear_bit(0, input->keybit);
673 }
674
675 if (req->subclass & 0x80) {
676 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
677 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
678 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
679 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
680 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
681 BIT_MASK(BTN_EXTRA);
682 input->relbit[0] |= BIT_MASK(REL_WHEEL);
683 }
684
685 input->dev.parent = &session->conn->hcon->dev;
686
687 input->event = hidp_input_event;
688
689 return 0;
690 }
691
692 static int hidp_open(struct hid_device *hid)
693 {
694 return 0;
695 }
696
697 static void hidp_close(struct hid_device *hid)
698 {
699 }
700
701 static int hidp_parse(struct hid_device *hid)
702 {
703 struct hidp_session *session = hid->driver_data;
704
705 return hid_parse_report(session->hid, session->rd_data,
706 session->rd_size);
707 }
708
709 static int hidp_start(struct hid_device *hid)
710 {
711 return 0;
712 }
713
714 static void hidp_stop(struct hid_device *hid)
715 {
716 struct hidp_session *session = hid->driver_data;
717
718 skb_queue_purge(&session->ctrl_transmit);
719 skb_queue_purge(&session->intr_transmit);
720
721 hid->claimed = 0;
722 }
723
724 static struct hid_ll_driver hidp_hid_driver = {
725 .parse = hidp_parse,
726 .start = hidp_start,
727 .stop = hidp_stop,
728 .open = hidp_open,
729 .close = hidp_close,
730 .hidinput_input_event = hidp_hidinput_event,
731 };
732
733 /* This function sets up the hid device. It does not add it
734 to the HID system. That is done in hidp_add_connection(). */
735 static int hidp_setup_hid(struct hidp_session *session,
736 struct hidp_connadd_req *req)
737 {
738 struct hid_device *hid;
739 int err;
740
741 session->rd_data = kzalloc(req->rd_size, GFP_KERNEL);
742 if (!session->rd_data)
743 return -ENOMEM;
744
745 if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) {
746 err = -EFAULT;
747 goto fault;
748 }
749 session->rd_size = req->rd_size;
750
751 hid = hid_allocate_device();
752 if (IS_ERR(hid)) {
753 err = PTR_ERR(hid);
754 goto fault;
755 }
756
757 session->hid = hid;
758
759 hid->driver_data = session;
760
761 hid->bus = BUS_BLUETOOTH;
762 hid->vendor = req->vendor;
763 hid->product = req->product;
764 hid->version = req->version;
765 hid->country = req->country;
766
767 strncpy(hid->name, req->name, sizeof(req->name) - 1);
768
769 snprintf(hid->phys, sizeof(hid->phys), "%pMR",
770 &l2cap_pi(session->ctrl_sock->sk)->chan->src);
771
772 snprintf(hid->uniq, sizeof(hid->uniq), "%pMR",
773 &l2cap_pi(session->ctrl_sock->sk)->chan->dst);
774
775 hid->dev.parent = &session->conn->hcon->dev;
776 hid->ll_driver = &hidp_hid_driver;
777
778 hid->hid_get_raw_report = hidp_get_raw_report;
779 hid->hid_output_raw_report = hidp_output_raw_report;
780
781 /* True if device is blacklisted in drivers/hid/hid-core.c */
782 if (hid_ignore(hid)) {
783 hid_destroy_device(session->hid);
784 session->hid = NULL;
785 return -ENODEV;
786 }
787
788 return 0;
789
790 fault:
791 kfree(session->rd_data);
792 session->rd_data = NULL;
793
794 return err;
795 }
796
797 /* initialize session devices */
798 static int hidp_session_dev_init(struct hidp_session *session,
799 struct hidp_connadd_req *req)
800 {
801 int ret;
802
803 if (req->rd_size > 0) {
804 ret = hidp_setup_hid(session, req);
805 if (ret && ret != -ENODEV)
806 return ret;
807 }
808
809 if (!session->hid) {
810 ret = hidp_setup_input(session, req);
811 if (ret < 0)
812 return ret;
813 }
814
815 return 0;
816 }
817
818 /* destroy session devices */
819 static void hidp_session_dev_destroy(struct hidp_session *session)
820 {
821 if (session->hid)
822 put_device(&session->hid->dev);
823 else if (session->input)
824 input_put_device(session->input);
825
826 kfree(session->rd_data);
827 session->rd_data = NULL;
828 }
829
830 /* add HID/input devices to their underlying bus systems */
831 static int hidp_session_dev_add(struct hidp_session *session)
832 {
833 int ret;
834
835 /* Both HID and input systems drop a ref-count when unregistering the
836 * device but they don't take a ref-count when registering them. Work
837 * around this by explicitly taking a refcount during registration
838 * which is dropped automatically by unregistering the devices. */
839
840 if (session->hid) {
841 ret = hid_add_device(session->hid);
842 if (ret)
843 return ret;
844 get_device(&session->hid->dev);
845 } else if (session->input) {
846 ret = input_register_device(session->input);
847 if (ret)
848 return ret;
849 input_get_device(session->input);
850 }
851
852 return 0;
853 }
854
855 /* remove HID/input devices from their bus systems */
856 static void hidp_session_dev_del(struct hidp_session *session)
857 {
858 if (session->hid)
859 hid_destroy_device(session->hid);
860 else if (session->input)
861 input_unregister_device(session->input);
862 }
863
864 /*
865 * Asynchronous device registration
866 * HID device drivers might want to perform I/O during initialization to
867 * detect device types. Therefore, call device registration in a separate
868 * worker so the HIDP thread can schedule I/O operations.
869 * Note that this must be called after the worker thread was initialized
870 * successfully. This will then add the devices and increase session state
871 * on success, otherwise it will terminate the session thread.
872 */
873 static void hidp_session_dev_work(struct work_struct *work)
874 {
875 struct hidp_session *session = container_of(work,
876 struct hidp_session,
877 dev_init);
878 int ret;
879
880 ret = hidp_session_dev_add(session);
881 if (!ret)
882 atomic_inc(&session->state);
883 else
884 hidp_session_terminate(session);
885 }
886
887 /*
888 * Create new session object
889 * Allocate session object, initialize static fields, copy input data into the
890 * object and take a reference to all sub-objects.
891 * This returns 0 on success and puts a pointer to the new session object in
892 * \out. Otherwise, an error code is returned.
893 * The new session object has an initial ref-count of 1.
894 */
895 static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr,
896 struct socket *ctrl_sock,
897 struct socket *intr_sock,
898 struct hidp_connadd_req *req,
899 struct l2cap_conn *conn)
900 {
901 struct hidp_session *session;
902 int ret;
903 struct bt_sock *ctrl, *intr;
904
905 ctrl = bt_sk(ctrl_sock->sk);
906 intr = bt_sk(intr_sock->sk);
907
908 session = kzalloc(sizeof(*session), GFP_KERNEL);
909 if (!session)
910 return -ENOMEM;
911
912 /* object and runtime management */
913 kref_init(&session->ref);
914 atomic_set(&session->state, HIDP_SESSION_IDLING);
915 init_waitqueue_head(&session->state_queue);
916 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
917
918 /* connection management */
919 bacpy(&session->bdaddr, bdaddr);
920 session->conn = conn;
921 session->user.probe = hidp_session_probe;
922 session->user.remove = hidp_session_remove;
923 session->ctrl_sock = ctrl_sock;
924 session->intr_sock = intr_sock;
925 skb_queue_head_init(&session->ctrl_transmit);
926 skb_queue_head_init(&session->intr_transmit);
927 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl)->chan->omtu,
928 l2cap_pi(ctrl)->chan->imtu);
929 session->intr_mtu = min_t(uint, l2cap_pi(intr)->chan->omtu,
930 l2cap_pi(intr)->chan->imtu);
931 session->idle_to = req->idle_to;
932
933 /* device management */
934 INIT_WORK(&session->dev_init, hidp_session_dev_work);
935 setup_timer(&session->timer, hidp_idle_timeout,
936 (unsigned long)session);
937
938 /* session data */
939 mutex_init(&session->report_mutex);
940 init_waitqueue_head(&session->report_queue);
941
942 ret = hidp_session_dev_init(session, req);
943 if (ret)
944 goto err_free;
945
946 l2cap_conn_get(session->conn);
947 get_file(session->intr_sock->file);
948 get_file(session->ctrl_sock->file);
949 *out = session;
950 return 0;
951
952 err_free:
953 kfree(session);
954 return ret;
955 }
956
957 /* increase ref-count of the given session by one */
958 static void hidp_session_get(struct hidp_session *session)
959 {
960 kref_get(&session->ref);
961 }
962
963 /* release callback */
964 static void session_free(struct kref *ref)
965 {
966 struct hidp_session *session = container_of(ref, struct hidp_session,
967 ref);
968
969 hidp_session_dev_destroy(session);
970 skb_queue_purge(&session->ctrl_transmit);
971 skb_queue_purge(&session->intr_transmit);
972 fput(session->intr_sock->file);
973 fput(session->ctrl_sock->file);
974 l2cap_conn_put(session->conn);
975 kfree(session);
976 }
977
978 /* decrease ref-count of the given session by one */
979 static void hidp_session_put(struct hidp_session *session)
980 {
981 kref_put(&session->ref, session_free);
982 }
983
984 /*
985 * Search the list of active sessions for a session with target address
986 * \bdaddr. You must hold at least a read-lock on \hidp_session_sem. As long as
987 * you do not release this lock, the session objects cannot vanish and you can
988 * safely take a reference to the session yourself.
989 */
990 static struct hidp_session *__hidp_session_find(const bdaddr_t *bdaddr)
991 {
992 struct hidp_session *session;
993
994 list_for_each_entry(session, &hidp_session_list, list) {
995 if (!bacmp(bdaddr, &session->bdaddr))
996 return session;
997 }
998
999 return NULL;
1000 }
1001
1002 /*
1003 * Same as __hidp_session_find() but no locks must be held. This also takes a
1004 * reference of the returned session (if non-NULL) so you must drop this
1005 * reference if you no longer use the object.
1006 */
1007 static struct hidp_session *hidp_session_find(const bdaddr_t *bdaddr)
1008 {
1009 struct hidp_session *session;
1010
1011 down_read(&hidp_session_sem);
1012
1013 session = __hidp_session_find(bdaddr);
1014 if (session)
1015 hidp_session_get(session);
1016
1017 up_read(&hidp_session_sem);
1018
1019 return session;
1020 }
1021
1022 /*
1023 * Start session synchronously
1024 * This starts a session thread and waits until initialization
1025 * is done or returns an error if it couldn't be started.
1026 * If this returns 0 the session thread is up and running. You must call
1027 * hipd_session_stop_sync() before deleting any runtime resources.
1028 */
1029 static int hidp_session_start_sync(struct hidp_session *session)
1030 {
1031 unsigned int vendor, product;
1032
1033 if (session->hid) {
1034 vendor = session->hid->vendor;
1035 product = session->hid->product;
1036 } else if (session->input) {
1037 vendor = session->input->id.vendor;
1038 product = session->input->id.product;
1039 } else {
1040 vendor = 0x0000;
1041 product = 0x0000;
1042 }
1043
1044 session->task = kthread_run(hidp_session_thread, session,
1045 "khidpd_%04x%04x", vendor, product);
1046 if (IS_ERR(session->task))
1047 return PTR_ERR(session->task);
1048
1049 while (atomic_read(&session->state) <= HIDP_SESSION_IDLING)
1050 wait_event(session->state_queue,
1051 atomic_read(&session->state) > HIDP_SESSION_IDLING);
1052
1053 return 0;
1054 }
1055
1056 /*
1057 * Terminate session thread
1058 * Wake up session thread and notify it to stop. This is asynchronous and
1059 * returns immediately. Call this whenever a runtime error occurs and you want
1060 * the session to stop.
1061 * Note: wake_up_process() performs any necessary memory-barriers for us.
1062 */
1063 static void hidp_session_terminate(struct hidp_session *session)
1064 {
1065 atomic_inc(&session->terminate);
1066 wake_up_process(session->task);
1067 }
1068
1069 /*
1070 * Probe HIDP session
1071 * This is called from the l2cap_conn core when our l2cap_user object is bound
1072 * to the hci-connection. We get the session via the \user object and can now
1073 * start the session thread, link it into the global session list and
1074 * schedule HID/input device registration.
1075 * The global session-list owns its own reference to the session object so you
1076 * can drop your own reference after registering the l2cap_user object.
1077 */
1078 static int hidp_session_probe(struct l2cap_conn *conn,
1079 struct l2cap_user *user)
1080 {
1081 struct hidp_session *session = container_of(user,
1082 struct hidp_session,
1083 user);
1084 struct hidp_session *s;
1085 int ret;
1086
1087 down_write(&hidp_session_sem);
1088
1089 /* check that no other session for this device exists */
1090 s = __hidp_session_find(&session->bdaddr);
1091 if (s) {
1092 ret = -EEXIST;
1093 goto out_unlock;
1094 }
1095
1096 if (session->input) {
1097 ret = hidp_session_dev_add(session);
1098 if (ret)
1099 goto out_unlock;
1100 }
1101
1102 ret = hidp_session_start_sync(session);
1103 if (ret)
1104 goto out_del;
1105
1106 /* HID device registration is async to allow I/O during probe */
1107 if (session->input)
1108 atomic_inc(&session->state);
1109 else
1110 schedule_work(&session->dev_init);
1111
1112 hidp_session_get(session);
1113 list_add(&session->list, &hidp_session_list);
1114 ret = 0;
1115 goto out_unlock;
1116
1117 out_del:
1118 if (session->input)
1119 hidp_session_dev_del(session);
1120 out_unlock:
1121 up_write(&hidp_session_sem);
1122 return ret;
1123 }
1124
1125 /*
1126 * Remove HIDP session
1127 * Called from the l2cap_conn core when either we explicitly unregistered
1128 * the l2cap_user object or if the underlying connection is shut down.
1129 * We signal the hidp-session thread to shut down, unregister the HID/input
1130 * devices and unlink the session from the global list.
1131 * This drops the reference to the session that is owned by the global
1132 * session-list.
1133 * Note: We _must_ not synchronosly wait for the session-thread to shut down.
1134 * This is, because the session-thread might be waiting for an HCI lock that is
1135 * held while we are called. Therefore, we only unregister the devices and
1136 * notify the session-thread to terminate. The thread itself owns a reference
1137 * to the session object so it can safely shut down.
1138 */
1139 static void hidp_session_remove(struct l2cap_conn *conn,
1140 struct l2cap_user *user)
1141 {
1142 struct hidp_session *session = container_of(user,
1143 struct hidp_session,
1144 user);
1145
1146 down_write(&hidp_session_sem);
1147
1148 hidp_session_terminate(session);
1149
1150 cancel_work_sync(&session->dev_init);
1151 if (session->input ||
1152 atomic_read(&session->state) > HIDP_SESSION_PREPARING)
1153 hidp_session_dev_del(session);
1154
1155 list_del(&session->list);
1156
1157 up_write(&hidp_session_sem);
1158
1159 hidp_session_put(session);
1160 }
1161
1162 /*
1163 * Session Worker
1164 * This performs the actual main-loop of the HIDP worker. We first check
1165 * whether the underlying connection is still alive, then parse all pending
1166 * messages and finally send all outstanding messages.
1167 */
1168 static void hidp_session_run(struct hidp_session *session)
1169 {
1170 struct sock *ctrl_sk = session->ctrl_sock->sk;
1171 struct sock *intr_sk = session->intr_sock->sk;
1172 struct sk_buff *skb;
1173
1174 for (;;) {
1175 /*
1176 * This thread can be woken up two ways:
1177 * - You call hidp_session_terminate() which sets the
1178 * session->terminate flag and wakes this thread up.
1179 * - Via modifying the socket state of ctrl/intr_sock. This
1180 * thread is woken up by ->sk_state_changed().
1181 *
1182 * Note: set_current_state() performs any necessary
1183 * memory-barriers for us.
1184 */
1185 set_current_state(TASK_INTERRUPTIBLE);
1186
1187 if (atomic_read(&session->terminate))
1188 break;
1189
1190 if (ctrl_sk->sk_state != BT_CONNECTED ||
1191 intr_sk->sk_state != BT_CONNECTED)
1192 break;
1193
1194 /* parse incoming intr-skbs */
1195 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
1196 skb_orphan(skb);
1197 if (!skb_linearize(skb))
1198 hidp_recv_intr_frame(session, skb);
1199 else
1200 kfree_skb(skb);
1201 }
1202
1203 /* send pending intr-skbs */
1204 hidp_process_transmit(session, &session->intr_transmit,
1205 session->intr_sock);
1206
1207 /* parse incoming ctrl-skbs */
1208 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
1209 skb_orphan(skb);
1210 if (!skb_linearize(skb))
1211 hidp_recv_ctrl_frame(session, skb);
1212 else
1213 kfree_skb(skb);
1214 }
1215
1216 /* send pending ctrl-skbs */
1217 hidp_process_transmit(session, &session->ctrl_transmit,
1218 session->ctrl_sock);
1219
1220 schedule();
1221 }
1222
1223 atomic_inc(&session->terminate);
1224 set_current_state(TASK_RUNNING);
1225 }
1226
1227 /*
1228 * HIDP session thread
1229 * This thread runs the I/O for a single HIDP session. Startup is synchronous
1230 * which allows us to take references to ourself here instead of doing that in
1231 * the caller.
1232 * When we are ready to run we notify the caller and call hidp_session_run().
1233 */
1234 static int hidp_session_thread(void *arg)
1235 {
1236 struct hidp_session *session = arg;
1237 wait_queue_t ctrl_wait, intr_wait;
1238
1239 BT_DBG("session %p", session);
1240
1241 /* initialize runtime environment */
1242 hidp_session_get(session);
1243 __module_get(THIS_MODULE);
1244 set_user_nice(current, -15);
1245 hidp_set_timer(session);
1246
1247 init_waitqueue_entry(&ctrl_wait, current);
1248 init_waitqueue_entry(&intr_wait, current);
1249 add_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait);
1250 add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
1251 /* This memory barrier is paired with wq_has_sleeper(). See
1252 * sock_poll_wait() for more information why this is needed. */
1253 smp_mb();
1254
1255 /* notify synchronous startup that we're ready */
1256 atomic_inc(&session->state);
1257 wake_up(&session->state_queue);
1258
1259 /* run session */
1260 hidp_session_run(session);
1261
1262 /* cleanup runtime environment */
1263 remove_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
1264 remove_wait_queue(sk_sleep(session->intr_sock->sk), &ctrl_wait);
1265 wake_up_interruptible(&session->report_queue);
1266 hidp_del_timer(session);
1267
1268 /*
1269 * If we stopped ourself due to any internal signal, we should try to
1270 * unregister our own session here to avoid having it linger until the
1271 * parent l2cap_conn dies or user-space cleans it up.
1272 * This does not deadlock as we don't do any synchronous shutdown.
1273 * Instead, this call has the same semantics as if user-space tried to
1274 * delete the session.
1275 */
1276 l2cap_unregister_user(session->conn, &session->user);
1277 hidp_session_put(session);
1278
1279 module_put_and_exit(0);
1280 return 0;
1281 }
1282
1283 static int hidp_verify_sockets(struct socket *ctrl_sock,
1284 struct socket *intr_sock)
1285 {
1286 struct l2cap_chan *ctrl_chan, *intr_chan;
1287 struct bt_sock *ctrl, *intr;
1288 struct hidp_session *session;
1289
1290 if (!l2cap_is_socket(ctrl_sock) || !l2cap_is_socket(intr_sock))
1291 return -EINVAL;
1292
1293 ctrl_chan = l2cap_pi(ctrl_sock->sk)->chan;
1294 intr_chan = l2cap_pi(intr_sock->sk)->chan;
1295
1296 if (bacmp(&ctrl_chan->src, &intr_chan->src) ||
1297 bacmp(&ctrl_chan->dst, &intr_chan->dst))
1298 return -ENOTUNIQ;
1299
1300 ctrl = bt_sk(ctrl_sock->sk);
1301 intr = bt_sk(intr_sock->sk);
1302
1303 if (ctrl->sk.sk_state != BT_CONNECTED ||
1304 intr->sk.sk_state != BT_CONNECTED)
1305 return -EBADFD;
1306
1307 /* early session check, we check again during session registration */
1308 session = hidp_session_find(&ctrl_chan->dst);
1309 if (session) {
1310 hidp_session_put(session);
1311 return -EEXIST;
1312 }
1313
1314 return 0;
1315 }
1316
1317 int hidp_connection_add(struct hidp_connadd_req *req,
1318 struct socket *ctrl_sock,
1319 struct socket *intr_sock)
1320 {
1321 struct hidp_session *session;
1322 struct l2cap_conn *conn;
1323 struct l2cap_chan *chan = l2cap_pi(ctrl_sock->sk)->chan;
1324 int ret;
1325
1326 ret = hidp_verify_sockets(ctrl_sock, intr_sock);
1327 if (ret)
1328 return ret;
1329
1330 conn = NULL;
1331 l2cap_chan_lock(chan);
1332 if (chan->conn) {
1333 l2cap_conn_get(chan->conn);
1334 conn = chan->conn;
1335 }
1336 l2cap_chan_unlock(chan);
1337
1338 if (!conn)
1339 return -EBADFD;
1340
1341 ret = hidp_session_new(&session, &chan->dst, ctrl_sock,
1342 intr_sock, req, conn);
1343 if (ret)
1344 goto out_conn;
1345
1346 ret = l2cap_register_user(conn, &session->user);
1347 if (ret)
1348 goto out_session;
1349
1350 ret = 0;
1351
1352 out_session:
1353 hidp_session_put(session);
1354 out_conn:
1355 l2cap_conn_put(conn);
1356 return ret;
1357 }
1358
1359 int hidp_connection_del(struct hidp_conndel_req *req)
1360 {
1361 struct hidp_session *session;
1362
1363 session = hidp_session_find(&req->bdaddr);
1364 if (!session)
1365 return -ENOENT;
1366
1367 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG))
1368 hidp_send_ctrl_message(session,
1369 HIDP_TRANS_HID_CONTROL |
1370 HIDP_CTRL_VIRTUAL_CABLE_UNPLUG,
1371 NULL, 0);
1372 else
1373 l2cap_unregister_user(session->conn, &session->user);
1374
1375 hidp_session_put(session);
1376
1377 return 0;
1378 }
1379
1380 int hidp_get_connlist(struct hidp_connlist_req *req)
1381 {
1382 struct hidp_session *session;
1383 int err = 0, n = 0;
1384
1385 BT_DBG("");
1386
1387 down_read(&hidp_session_sem);
1388
1389 list_for_each_entry(session, &hidp_session_list, list) {
1390 struct hidp_conninfo ci;
1391
1392 hidp_copy_session(session, &ci);
1393
1394 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
1395 err = -EFAULT;
1396 break;
1397 }
1398
1399 if (++n >= req->cnum)
1400 break;
1401
1402 req->ci++;
1403 }
1404 req->cnum = n;
1405
1406 up_read(&hidp_session_sem);
1407 return err;
1408 }
1409
1410 int hidp_get_conninfo(struct hidp_conninfo *ci)
1411 {
1412 struct hidp_session *session;
1413
1414 session = hidp_session_find(&ci->bdaddr);
1415 if (session) {
1416 hidp_copy_session(session, ci);
1417 hidp_session_put(session);
1418 }
1419
1420 return session ? 0 : -ENOENT;
1421 }
1422
1423 static int __init hidp_init(void)
1424 {
1425 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
1426
1427 return hidp_init_sockets();
1428 }
1429
1430 static void __exit hidp_exit(void)
1431 {
1432 hidp_cleanup_sockets();
1433 }
1434
1435 module_init(hidp_init);
1436 module_exit(hidp_exit);
1437
1438 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1439 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1440 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
1441 MODULE_VERSION(VERSION);
1442 MODULE_LICENSE("GPL");
1443 MODULE_ALIAS("bt-proto-6");
Linux with added FPC-III support