[Bluetooth] Integrate services into the driver model
[linux-2.6.git] / net / bluetooth / hidp / core.c
1 /* 
2    HIDP implementation for Linux Bluetooth stack (BlueZ).
3    Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
4
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License version 2 as
7    published by the Free Software Foundation;
8
9    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
10    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
12    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
13    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
14    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
15    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
16    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
19    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
20    SOFTWARE IS DISCLAIMED.
21 */
22
23 #include <linux/module.h>
24
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/slab.h>
30 #include <linux/poll.h>
31 #include <linux/fcntl.h>
32 #include <linux/skbuff.h>
33 #include <linux/socket.h>
34 #include <linux/ioctl.h>
35 #include <linux/file.h>
36 #include <linux/init.h>
37 #include <linux/wait.h>
38 #include <net/sock.h>
39
40 #include <linux/input.h>
41
42 #include <net/bluetooth/bluetooth.h>
43 #include <net/bluetooth/hci_core.h>
44 #include <net/bluetooth/l2cap.h>
45
46 #include "hidp.h"
47
48 #ifndef CONFIG_BT_HIDP_DEBUG
49 #undef  BT_DBG
50 #define BT_DBG(D...)
51 #endif
52
53 #define VERSION "1.1"
54
55 static DECLARE_RWSEM(hidp_session_sem);
56 static LIST_HEAD(hidp_session_list);
57
58 static unsigned char hidp_keycode[256] = {
59           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
60          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
61           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
62          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
63          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
64         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
65          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
66         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
67         115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
68         122,123, 90, 91, 85,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
69           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
70           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
71           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
72           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
73          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
74         150,158,159,128,136,177,178,176,142,152,173,140
75 };
76
77 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
78
79 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr)
80 {
81         struct hidp_session *session;
82         struct list_head *p;
83
84         BT_DBG("");
85
86         list_for_each(p, &hidp_session_list) {
87                 session = list_entry(p, struct hidp_session, list);
88                 if (!bacmp(bdaddr, &session->bdaddr))
89                         return session;
90         }
91         return NULL;
92 }
93
94 static void __hidp_link_session(struct hidp_session *session)
95 {
96         __module_get(THIS_MODULE);
97         list_add(&session->list, &hidp_session_list);
98 }
99
100 static void __hidp_unlink_session(struct hidp_session *session)
101 {
102         list_del(&session->list);
103         module_put(THIS_MODULE);
104 }
105
106 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
107 {
108         bacpy(&ci->bdaddr, &session->bdaddr);
109
110         ci->flags = session->flags;
111         ci->state = session->state;
112
113         ci->vendor  = 0x0000;
114         ci->product = 0x0000;
115         ci->version = 0x0000;
116         memset(ci->name, 0, 128);
117
118         if (session->input) {
119                 ci->vendor  = session->input->id.vendor;
120                 ci->product = session->input->id.product;
121                 ci->version = session->input->id.version;
122                 if (session->input->name)
123                         strncpy(ci->name, session->input->name, 128);
124                 else
125                         strncpy(ci->name, "HID Boot Device", 128);
126         }
127 }
128
129 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
130 {
131         struct hidp_session *session = dev->private;
132         struct sk_buff *skb;
133         unsigned char newleds;
134
135         BT_DBG("input %p type %d code %d value %d", dev, type, code, value);
136
137         if (type != EV_LED)
138                 return -1;
139
140         newleds = (!!test_bit(LED_KANA,    dev->led) << 3) |
141                   (!!test_bit(LED_COMPOSE, dev->led) << 3) |
142                   (!!test_bit(LED_SCROLLL, dev->led) << 2) |
143                   (!!test_bit(LED_CAPSL,   dev->led) << 1) |
144                   (!!test_bit(LED_NUML,    dev->led));
145
146         if (session->leds == newleds)
147                 return 0;
148
149         session->leds = newleds;
150
151         if (!(skb = alloc_skb(3, GFP_ATOMIC))) {
152                 BT_ERR("Can't allocate memory for new frame");
153                 return -ENOMEM;
154         }
155
156         *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
157         *skb_put(skb, 1) = 0x01;
158         *skb_put(skb, 1) = newleds;
159
160         skb_queue_tail(&session->intr_transmit, skb);
161
162         hidp_schedule(session);
163
164         return 0;
165 }
166
167 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
168 {
169         struct input_dev *dev = session->input;
170         unsigned char *keys = session->keys;
171         unsigned char *udata = skb->data + 1;
172         signed char *sdata = skb->data + 1;
173         int i, size = skb->len - 1;
174
175         switch (skb->data[0]) {
176         case 0x01:      /* Keyboard report */
177                 for (i = 0; i < 8; i++)
178                         input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
179
180                 /* If all the key codes have been set to 0x01, it means
181                  * too many keys were pressed at the same time. */
182                 if (!memcmp(udata + 2, hidp_mkeyspat, 6))
183                         break;
184
185                 for (i = 2; i < 8; i++) {
186                         if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
187                                 if (hidp_keycode[keys[i]])
188                                         input_report_key(dev, hidp_keycode[keys[i]], 0);
189                                 else
190                                         BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
191                         }
192
193                         if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
194                                 if (hidp_keycode[udata[i]])
195                                         input_report_key(dev, hidp_keycode[udata[i]], 1);
196                                 else
197                                         BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
198                         }
199                 }
200
201                 memcpy(keys, udata, 8);
202                 break;
203
204         case 0x02:      /* Mouse report */
205                 input_report_key(dev, BTN_LEFT,   sdata[0] & 0x01);
206                 input_report_key(dev, BTN_RIGHT,  sdata[0] & 0x02);
207                 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
208                 input_report_key(dev, BTN_SIDE,   sdata[0] & 0x08);
209                 input_report_key(dev, BTN_EXTRA,  sdata[0] & 0x10);
210
211                 input_report_rel(dev, REL_X, sdata[1]);
212                 input_report_rel(dev, REL_Y, sdata[2]);
213
214                 if (size > 3)
215                         input_report_rel(dev, REL_WHEEL, sdata[3]);
216                 break;
217         }
218
219         input_sync(dev);
220 }
221
222 static void hidp_idle_timeout(unsigned long arg)
223 {
224         struct hidp_session *session = (struct hidp_session *) arg;
225
226         atomic_inc(&session->terminate);
227         hidp_schedule(session);
228 }
229
230 static inline void hidp_set_timer(struct hidp_session *session)
231 {
232         if (session->idle_to > 0)
233                 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
234 }
235
236 static inline void hidp_del_timer(struct hidp_session *session)
237 {
238         if (session->idle_to > 0)
239                 del_timer(&session->timer);
240 }
241
242 static int __hidp_send_ctrl_message(struct hidp_session *session,
243                         unsigned char hdr, unsigned char *data, int size)
244 {
245         struct sk_buff *skb;
246
247         BT_DBG("session %p data %p size %d", session, data, size);
248
249         if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
250                 BT_ERR("Can't allocate memory for new frame");
251                 return -ENOMEM;
252         }
253
254         *skb_put(skb, 1) = hdr;
255         if (data && size > 0)
256                 memcpy(skb_put(skb, size), data, size);
257
258         skb_queue_tail(&session->ctrl_transmit, skb);
259
260         return 0;
261 }
262
263 static int inline hidp_send_ctrl_message(struct hidp_session *session,
264                         unsigned char hdr, unsigned char *data, int size)
265 {
266         int err;
267
268         err = __hidp_send_ctrl_message(session, hdr, data, size);
269
270         hidp_schedule(session);
271
272         return err;
273 }
274
275 static inline void hidp_process_handshake(struct hidp_session *session, unsigned char param)
276 {
277         BT_DBG("session %p param 0x%02x", session, param);
278
279         switch (param) {
280         case HIDP_HSHK_SUCCESSFUL:
281                 /* FIXME: Call into SET_ GET_ handlers here */
282                 break;
283
284         case HIDP_HSHK_NOT_READY:
285         case HIDP_HSHK_ERR_INVALID_REPORT_ID:
286         case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
287         case HIDP_HSHK_ERR_INVALID_PARAMETER:
288                 /* FIXME: Call into SET_ GET_ handlers here */
289                 break;
290
291         case HIDP_HSHK_ERR_UNKNOWN:
292                 break;
293
294         case HIDP_HSHK_ERR_FATAL:
295                 /* Device requests a reboot, as this is the only way this error
296                  * can be recovered. */
297                 __hidp_send_ctrl_message(session,
298                         HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
299                 break;
300
301         default:
302                 __hidp_send_ctrl_message(session,
303                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
304                 break;
305         }
306 }
307
308 static inline void hidp_process_hid_control(struct hidp_session *session, unsigned char param)
309 {
310         BT_DBG("session %p param 0x%02x", session, param);
311
312         switch (param) {
313         case HIDP_CTRL_NOP:
314                 break;
315
316         case HIDP_CTRL_VIRTUAL_CABLE_UNPLUG:
317                 /* Flush the transmit queues */
318                 skb_queue_purge(&session->ctrl_transmit);
319                 skb_queue_purge(&session->intr_transmit);
320
321                 /* Kill session thread */
322                 atomic_inc(&session->terminate);
323                 break;
324
325         case HIDP_CTRL_HARD_RESET:
326         case HIDP_CTRL_SOFT_RESET:
327         case HIDP_CTRL_SUSPEND:
328         case HIDP_CTRL_EXIT_SUSPEND:
329                 /* FIXME: We have to parse these and return no error */
330                 break;
331
332         default:
333                 __hidp_send_ctrl_message(session,
334                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
335                 break;
336         }
337 }
338
339 static inline void hidp_process_data(struct hidp_session *session, struct sk_buff *skb, unsigned char param)
340 {
341         BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
342
343         switch (param) {
344         case HIDP_DATA_RTYPE_INPUT:
345                 hidp_set_timer(session);
346
347                 if (session->input)
348                         hidp_input_report(session, skb);
349                 break;
350
351         case HIDP_DATA_RTYPE_OTHER:
352         case HIDP_DATA_RTYPE_OUPUT:
353         case HIDP_DATA_RTYPE_FEATURE:
354                 break;
355
356         default:
357                 __hidp_send_ctrl_message(session,
358                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
359         }
360 }
361
362 static inline void hidp_recv_ctrl_frame(struct hidp_session *session, struct sk_buff *skb)
363 {
364         unsigned char hdr, type, param;
365
366         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
367
368         hdr = skb->data[0];
369         skb_pull(skb, 1);
370
371         type = hdr & HIDP_HEADER_TRANS_MASK;
372         param = hdr & HIDP_HEADER_PARAM_MASK;
373
374         switch (type) {
375         case HIDP_TRANS_HANDSHAKE:
376                 hidp_process_handshake(session, param);
377                 break;
378
379         case HIDP_TRANS_HID_CONTROL:
380                 hidp_process_hid_control(session, param);
381                 break;
382
383         case HIDP_TRANS_DATA:
384                 hidp_process_data(session, skb, param);
385                 break;
386
387         default:
388                 __hidp_send_ctrl_message(session,
389                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
390                 break;
391         }
392
393         kfree_skb(skb);
394 }
395
396 static inline void hidp_recv_intr_frame(struct hidp_session *session, struct sk_buff *skb)
397 {
398         unsigned char hdr;
399
400         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
401
402         hdr = skb->data[0];
403         skb_pull(skb, 1);
404
405         if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
406                 hidp_set_timer(session);
407                 if (session->input)
408                         hidp_input_report(session, skb);
409         } else {
410                 BT_DBG("Unsupported protocol header 0x%02x", hdr);
411         }
412
413         kfree_skb(skb);
414 }
415
416 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
417 {
418         struct kvec iv = { data, len };
419         struct msghdr msg;
420
421         BT_DBG("sock %p data %p len %d", sock, data, len);
422
423         if (!len)
424                 return 0;
425
426         memset(&msg, 0, sizeof(msg));
427
428         return kernel_sendmsg(sock, &msg, &iv, 1, len);
429 }
430
431 static void hidp_process_transmit(struct hidp_session *session)
432 {
433         struct sk_buff *skb;
434
435         BT_DBG("session %p", session);
436
437         while ((skb = skb_dequeue(&session->ctrl_transmit))) {
438                 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
439                         skb_queue_head(&session->ctrl_transmit, skb);
440                         break;
441                 }
442
443                 hidp_set_timer(session);
444                 kfree_skb(skb);
445         }
446
447         while ((skb = skb_dequeue(&session->intr_transmit))) {
448                 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
449                         skb_queue_head(&session->intr_transmit, skb);
450                         break;
451                 }
452
453                 hidp_set_timer(session);
454                 kfree_skb(skb);
455         }
456 }
457
458 static int hidp_session(void *arg)
459 {
460         struct hidp_session *session = arg;
461         struct sock *ctrl_sk = session->ctrl_sock->sk;
462         struct sock *intr_sk = session->intr_sock->sk;
463         struct sk_buff *skb;
464         int vendor = 0x0000, product = 0x0000;
465         wait_queue_t ctrl_wait, intr_wait;
466
467         BT_DBG("session %p", session);
468
469         if (session->input) {
470                 vendor  = session->input->id.vendor;
471                 product = session->input->id.product;
472         }
473
474         daemonize("khidpd_%04x%04x", vendor, product);
475         set_user_nice(current, -15);
476         current->flags |= PF_NOFREEZE;
477
478         init_waitqueue_entry(&ctrl_wait, current);
479         init_waitqueue_entry(&intr_wait, current);
480         add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
481         add_wait_queue(intr_sk->sk_sleep, &intr_wait);
482         while (!atomic_read(&session->terminate)) {
483                 set_current_state(TASK_INTERRUPTIBLE);
484
485                 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED)
486                         break;
487
488                 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
489                         skb_orphan(skb);
490                         hidp_recv_ctrl_frame(session, skb);
491                 }
492
493                 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
494                         skb_orphan(skb);
495                         hidp_recv_intr_frame(session, skb);
496                 }
497
498                 hidp_process_transmit(session);
499
500                 schedule();
501         }
502         set_current_state(TASK_RUNNING);
503         remove_wait_queue(intr_sk->sk_sleep, &intr_wait);
504         remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
505
506         down_write(&hidp_session_sem);
507
508         hidp_del_timer(session);
509
510         if (intr_sk->sk_state != BT_CONNECTED)
511                 wait_event_timeout(*(ctrl_sk->sk_sleep), (ctrl_sk->sk_state == BT_CLOSED), HZ);
512
513         fput(session->ctrl_sock->file);
514
515         wait_event_timeout(*(intr_sk->sk_sleep), (intr_sk->sk_state == BT_CLOSED), HZ);
516
517         fput(session->intr_sock->file);
518
519         __hidp_unlink_session(session);
520
521         if (session->input) {
522                 input_unregister_device(session->input);
523                 session->input = NULL;
524         }
525
526         up_write(&hidp_session_sem);
527
528         kfree(session);
529         return 0;
530 }
531
532 static struct device *hidp_get_device(struct hidp_session *session)
533 {
534         bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
535         bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
536         struct hci_dev *hdev;
537         struct hci_conn *conn;
538
539         hdev = hci_get_route(dst, src);
540         if (!hdev)
541                 return NULL;
542
543         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
544         if (!conn)
545                 return NULL;
546
547         hci_dev_put(hdev);
548
549         return &conn->dev;
550 }
551
552 static inline void hidp_setup_input(struct hidp_session *session, struct hidp_connadd_req *req)
553 {
554         struct input_dev *input = session->input;
555         int i;
556
557         input->private = session;
558
559         input->name = "Bluetooth HID Boot Protocol Device";
560
561         input->id.bustype = BUS_BLUETOOTH;
562         input->id.vendor  = req->vendor;
563         input->id.product = req->product;
564         input->id.version = req->version;
565
566         if (req->subclass & 0x40) {
567                 set_bit(EV_KEY, input->evbit);
568                 set_bit(EV_LED, input->evbit);
569                 set_bit(EV_REP, input->evbit);
570
571                 set_bit(LED_NUML,    input->ledbit);
572                 set_bit(LED_CAPSL,   input->ledbit);
573                 set_bit(LED_SCROLLL, input->ledbit);
574                 set_bit(LED_COMPOSE, input->ledbit);
575                 set_bit(LED_KANA,    input->ledbit);
576
577                 for (i = 0; i < sizeof(hidp_keycode); i++)
578                         set_bit(hidp_keycode[i], input->keybit);
579                 clear_bit(0, input->keybit);
580         }
581
582         if (req->subclass & 0x80) {
583                 input->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
584                 input->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
585                 input->relbit[0] = BIT(REL_X) | BIT(REL_Y);
586                 input->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
587                 input->relbit[0] |= BIT(REL_WHEEL);
588         }
589
590         input->cdev.dev = hidp_get_device(session);
591
592         input->event = hidp_input_event;
593
594         input_register_device(input);
595 }
596
597 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
598 {
599         struct hidp_session *session, *s;
600         int err;
601
602         BT_DBG("");
603
604         if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
605                         bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
606                 return -ENOTUNIQ;
607
608         session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
609         if (!session)
610                 return -ENOMEM;
611
612         session->input = input_allocate_device();
613         if (!session->input) {
614                 kfree(session);
615                 return -ENOMEM;
616         }
617
618         down_write(&hidp_session_sem);
619
620         s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
621         if (s && s->state == BT_CONNECTED) {
622                 err = -EEXIST;
623                 goto failed;
624         }
625
626         bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
627
628         session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
629         session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
630
631         BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
632
633         session->ctrl_sock = ctrl_sock;
634         session->intr_sock = intr_sock;
635         session->state     = BT_CONNECTED;
636
637         init_timer(&session->timer);
638
639         session->timer.function = hidp_idle_timeout;
640         session->timer.data     = (unsigned long) session;
641
642         skb_queue_head_init(&session->ctrl_transmit);
643         skb_queue_head_init(&session->intr_transmit);
644
645         session->flags   = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
646         session->idle_to = req->idle_to;
647
648         if (session->input)
649                 hidp_setup_input(session, req);
650
651         __hidp_link_session(session);
652
653         hidp_set_timer(session);
654
655         err = kernel_thread(hidp_session, session, CLONE_KERNEL);
656         if (err < 0)
657                 goto unlink;
658
659         if (session->input) {
660                 hidp_send_ctrl_message(session,
661                         HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
662                 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
663
664                 session->leds = 0xff;
665                 hidp_input_event(session->input, EV_LED, 0, 0);
666         }
667
668         up_write(&hidp_session_sem);
669         return 0;
670
671 unlink:
672         hidp_del_timer(session);
673
674         __hidp_unlink_session(session);
675
676         if (session->input) {
677                 input_unregister_device(session->input);
678                 session->input = NULL; /* don't try to free it here */
679         }
680
681 failed:
682         up_write(&hidp_session_sem);
683
684         kfree(session->input);
685         kfree(session);
686         return err;
687 }
688
689 int hidp_del_connection(struct hidp_conndel_req *req)
690 {
691         struct hidp_session *session;
692         int err = 0;
693
694         BT_DBG("");
695
696         down_read(&hidp_session_sem);
697
698         session = __hidp_get_session(&req->bdaddr);
699         if (session) {
700                 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
701                         hidp_send_ctrl_message(session,
702                                 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
703                 } else {
704                         /* Flush the transmit queues */
705                         skb_queue_purge(&session->ctrl_transmit);
706                         skb_queue_purge(&session->intr_transmit);
707
708                         /* Kill session thread */
709                         atomic_inc(&session->terminate);
710                         hidp_schedule(session);
711                 }
712         } else
713                 err = -ENOENT;
714
715         up_read(&hidp_session_sem);
716         return err;
717 }
718
719 int hidp_get_connlist(struct hidp_connlist_req *req)
720 {
721         struct list_head *p;
722         int err = 0, n = 0;
723
724         BT_DBG("");
725
726         down_read(&hidp_session_sem);
727
728         list_for_each(p, &hidp_session_list) {
729                 struct hidp_session *session;
730                 struct hidp_conninfo ci;
731
732                 session = list_entry(p, struct hidp_session, list);
733
734                 __hidp_copy_session(session, &ci);
735
736                 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
737                         err = -EFAULT;
738                         break;
739                 }
740
741                 if (++n >= req->cnum)
742                         break;
743
744                 req->ci++;
745         }
746         req->cnum = n;
747
748         up_read(&hidp_session_sem);
749         return err;
750 }
751
752 int hidp_get_conninfo(struct hidp_conninfo *ci)
753 {
754         struct hidp_session *session;
755         int err = 0;
756
757         down_read(&hidp_session_sem);
758
759         session = __hidp_get_session(&ci->bdaddr);
760         if (session)
761                 __hidp_copy_session(session, ci);
762         else
763                 err = -ENOENT;
764
765         up_read(&hidp_session_sem);
766         return err;
767 }
768
769 static int __init hidp_init(void)
770 {
771         l2cap_load();
772
773         BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
774
775         return hidp_init_sockets();
776 }
777
778 static void __exit hidp_exit(void)
779 {
780         hidp_cleanup_sockets();
781 }
782
783 module_init(hidp_init);
784 module_exit(hidp_exit);
785
786 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
787 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
788 MODULE_VERSION(VERSION);
789 MODULE_LICENSE("GPL");
790 MODULE_ALIAS("bt-proto-6");