bluetooth: uninlining
[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/freezer.h>
32 #include <linux/fcntl.h>
33 #include <linux/skbuff.h>
34 #include <linux/socket.h>
35 #include <linux/ioctl.h>
36 #include <linux/file.h>
37 #include <linux/init.h>
38 #include <linux/wait.h>
39 #include <net/sock.h>
40
41 #include <linux/input.h>
42 #include <linux/hid.h>
43
44 #include <net/bluetooth/bluetooth.h>
45 #include <net/bluetooth/hci_core.h>
46 #include <net/bluetooth/l2cap.h>
47
48 #include "hidp.h"
49
50 #ifndef CONFIG_BT_HIDP_DEBUG
51 #undef  BT_DBG
52 #define BT_DBG(D...)
53 #endif
54
55 #define VERSION "1.2"
56
57 static DECLARE_RWSEM(hidp_session_sem);
58 static LIST_HEAD(hidp_session_list);
59
60 static unsigned char hidp_keycode[256] = {
61           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
62          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
63           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
64          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
65          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
66         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
67          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
68         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
69         115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
70         122,123, 90, 91, 85,  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           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
74           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
75          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
76         150,158,159,128,136,177,178,176,142,152,173,140
77 };
78
79 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
80
81 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr)
82 {
83         struct hidp_session *session;
84         struct list_head *p;
85
86         BT_DBG("");
87
88         list_for_each(p, &hidp_session_list) {
89                 session = list_entry(p, struct hidp_session, list);
90                 if (!bacmp(bdaddr, &session->bdaddr))
91                         return session;
92         }
93         return NULL;
94 }
95
96 static void __hidp_link_session(struct hidp_session *session)
97 {
98         __module_get(THIS_MODULE);
99         list_add(&session->list, &hidp_session_list);
100 }
101
102 static void __hidp_unlink_session(struct hidp_session *session)
103 {
104         list_del(&session->list);
105         module_put(THIS_MODULE);
106 }
107
108 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
109 {
110         bacpy(&ci->bdaddr, &session->bdaddr);
111
112         ci->flags = session->flags;
113         ci->state = session->state;
114
115         ci->vendor  = 0x0000;
116         ci->product = 0x0000;
117         ci->version = 0x0000;
118         memset(ci->name, 0, 128);
119
120         if (session->input) {
121                 ci->vendor  = session->input->id.vendor;
122                 ci->product = session->input->id.product;
123                 ci->version = session->input->id.version;
124                 if (session->input->name)
125                         strncpy(ci->name, session->input->name, 128);
126                 else
127                         strncpy(ci->name, "HID Boot Device", 128);
128         }
129
130         if (session->hid) {
131                 ci->vendor  = session->hid->vendor;
132                 ci->product = session->hid->product;
133                 ci->version = session->hid->version;
134                 strncpy(ci->name, session->hid->name, 128);
135         }
136 }
137
138 static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
139                                 unsigned int type, unsigned int code, int value)
140 {
141         unsigned char newleds;
142         struct sk_buff *skb;
143
144         BT_DBG("session %p type %d code %d value %d", session, type, code, value);
145
146         if (type != EV_LED)
147                 return -1;
148
149         newleds = (!!test_bit(LED_KANA,    dev->led) << 3) |
150                   (!!test_bit(LED_COMPOSE, dev->led) << 3) |
151                   (!!test_bit(LED_SCROLLL, dev->led) << 2) |
152                   (!!test_bit(LED_CAPSL,   dev->led) << 1) |
153                   (!!test_bit(LED_NUML,    dev->led));
154
155         if (session->leds == newleds)
156                 return 0;
157
158         session->leds = newleds;
159
160         if (!(skb = alloc_skb(3, GFP_ATOMIC))) {
161                 BT_ERR("Can't allocate memory for new frame");
162                 return -ENOMEM;
163         }
164
165         *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
166         *skb_put(skb, 1) = 0x01;
167         *skb_put(skb, 1) = newleds;
168
169         skb_queue_tail(&session->intr_transmit, skb);
170
171         hidp_schedule(session);
172
173         return 0;
174 }
175
176 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
177 {
178         struct hid_device *hid = input_get_drvdata(dev);
179         struct hidp_session *session = hid->driver_data;
180
181         return hidp_queue_event(session, dev, type, code, value);
182 }
183
184 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
185 {
186         struct hidp_session *session = input_get_drvdata(dev);
187
188         return hidp_queue_event(session, dev, type, code, value);
189 }
190
191 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
192 {
193         struct input_dev *dev = session->input;
194         unsigned char *keys = session->keys;
195         unsigned char *udata = skb->data + 1;
196         signed char *sdata = skb->data + 1;
197         int i, size = skb->len - 1;
198
199         switch (skb->data[0]) {
200         case 0x01:      /* Keyboard report */
201                 for (i = 0; i < 8; i++)
202                         input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
203
204                 /* If all the key codes have been set to 0x01, it means
205                  * too many keys were pressed at the same time. */
206                 if (!memcmp(udata + 2, hidp_mkeyspat, 6))
207                         break;
208
209                 for (i = 2; i < 8; i++) {
210                         if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
211                                 if (hidp_keycode[keys[i]])
212                                         input_report_key(dev, hidp_keycode[keys[i]], 0);
213                                 else
214                                         BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
215                         }
216
217                         if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
218                                 if (hidp_keycode[udata[i]])
219                                         input_report_key(dev, hidp_keycode[udata[i]], 1);
220                                 else
221                                         BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
222                         }
223                 }
224
225                 memcpy(keys, udata, 8);
226                 break;
227
228         case 0x02:      /* Mouse report */
229                 input_report_key(dev, BTN_LEFT,   sdata[0] & 0x01);
230                 input_report_key(dev, BTN_RIGHT,  sdata[0] & 0x02);
231                 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
232                 input_report_key(dev, BTN_SIDE,   sdata[0] & 0x08);
233                 input_report_key(dev, BTN_EXTRA,  sdata[0] & 0x10);
234
235                 input_report_rel(dev, REL_X, sdata[1]);
236                 input_report_rel(dev, REL_Y, sdata[2]);
237
238                 if (size > 3)
239                         input_report_rel(dev, REL_WHEEL, sdata[3]);
240                 break;
241         }
242
243         input_sync(dev);
244 }
245
246 static int hidp_queue_report(struct hidp_session *session,
247                                 unsigned char *data, int size)
248 {
249         struct sk_buff *skb;
250
251         BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size);
252
253         if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
254                 BT_ERR("Can't allocate memory for new frame");
255                 return -ENOMEM;
256         }
257
258         *skb_put(skb, 1) = 0xa2;
259         if (size > 0)
260                 memcpy(skb_put(skb, size), data, size);
261
262         skb_queue_tail(&session->intr_transmit, skb);
263
264         hidp_schedule(session);
265
266         return 0;
267 }
268
269 static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
270 {
271         unsigned char buf[32];
272         int rsize;
273
274         rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
275         if (rsize > sizeof(buf))
276                 return -EIO;
277
278         hid_output_report(report, buf);
279
280         return hidp_queue_report(session, buf, rsize);
281 }
282
283 static void hidp_idle_timeout(unsigned long arg)
284 {
285         struct hidp_session *session = (struct hidp_session *) arg;
286
287         atomic_inc(&session->terminate);
288         hidp_schedule(session);
289 }
290
291 static void hidp_set_timer(struct hidp_session *session)
292 {
293         if (session->idle_to > 0)
294                 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
295 }
296
297 static inline void hidp_del_timer(struct hidp_session *session)
298 {
299         if (session->idle_to > 0)
300                 del_timer(&session->timer);
301 }
302
303 static int __hidp_send_ctrl_message(struct hidp_session *session,
304                         unsigned char hdr, unsigned char *data, int size)
305 {
306         struct sk_buff *skb;
307
308         BT_DBG("session %p data %p size %d", session, data, size);
309
310         if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
311                 BT_ERR("Can't allocate memory for new frame");
312                 return -ENOMEM;
313         }
314
315         *skb_put(skb, 1) = hdr;
316         if (data && size > 0)
317                 memcpy(skb_put(skb, size), data, size);
318
319         skb_queue_tail(&session->ctrl_transmit, skb);
320
321         return 0;
322 }
323
324 static inline int hidp_send_ctrl_message(struct hidp_session *session,
325                         unsigned char hdr, unsigned char *data, int size)
326 {
327         int err;
328
329         err = __hidp_send_ctrl_message(session, hdr, data, size);
330
331         hidp_schedule(session);
332
333         return err;
334 }
335
336 static void hidp_process_handshake(struct hidp_session *session,
337                                         unsigned char param)
338 {
339         BT_DBG("session %p param 0x%02x", session, param);
340
341         switch (param) {
342         case HIDP_HSHK_SUCCESSFUL:
343                 /* FIXME: Call into SET_ GET_ handlers here */
344                 break;
345
346         case HIDP_HSHK_NOT_READY:
347         case HIDP_HSHK_ERR_INVALID_REPORT_ID:
348         case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
349         case HIDP_HSHK_ERR_INVALID_PARAMETER:
350                 /* FIXME: Call into SET_ GET_ handlers here */
351                 break;
352
353         case HIDP_HSHK_ERR_UNKNOWN:
354                 break;
355
356         case HIDP_HSHK_ERR_FATAL:
357                 /* Device requests a reboot, as this is the only way this error
358                  * can be recovered. */
359                 __hidp_send_ctrl_message(session,
360                         HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
361                 break;
362
363         default:
364                 __hidp_send_ctrl_message(session,
365                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
366                 break;
367         }
368 }
369
370 static void hidp_process_hid_control(struct hidp_session *session,
371                                         unsigned char param)
372 {
373         BT_DBG("session %p param 0x%02x", session, param);
374
375         if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
376                 /* Flush the transmit queues */
377                 skb_queue_purge(&session->ctrl_transmit);
378                 skb_queue_purge(&session->intr_transmit);
379
380                 /* Kill session thread */
381                 atomic_inc(&session->terminate);
382         }
383 }
384
385 static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
386                                 unsigned char param)
387 {
388         BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
389
390         switch (param) {
391         case HIDP_DATA_RTYPE_INPUT:
392                 hidp_set_timer(session);
393
394                 if (session->input)
395                         hidp_input_report(session, skb);
396
397                 if (session->hid)
398                         hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
399
400                 break;
401
402         case HIDP_DATA_RTYPE_OTHER:
403         case HIDP_DATA_RTYPE_OUPUT:
404         case HIDP_DATA_RTYPE_FEATURE:
405                 break;
406
407         default:
408                 __hidp_send_ctrl_message(session,
409                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
410         }
411 }
412
413 static void hidp_recv_ctrl_frame(struct hidp_session *session,
414                                         struct sk_buff *skb)
415 {
416         unsigned char hdr, type, param;
417
418         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
419
420         hdr = skb->data[0];
421         skb_pull(skb, 1);
422
423         type = hdr & HIDP_HEADER_TRANS_MASK;
424         param = hdr & HIDP_HEADER_PARAM_MASK;
425
426         switch (type) {
427         case HIDP_TRANS_HANDSHAKE:
428                 hidp_process_handshake(session, param);
429                 break;
430
431         case HIDP_TRANS_HID_CONTROL:
432                 hidp_process_hid_control(session, param);
433                 break;
434
435         case HIDP_TRANS_DATA:
436                 hidp_process_data(session, skb, param);
437                 break;
438
439         default:
440                 __hidp_send_ctrl_message(session,
441                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
442                 break;
443         }
444
445         kfree_skb(skb);
446 }
447
448 static void hidp_recv_intr_frame(struct hidp_session *session,
449                                 struct sk_buff *skb)
450 {
451         unsigned char hdr;
452
453         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
454
455         hdr = skb->data[0];
456         skb_pull(skb, 1);
457
458         if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
459                 hidp_set_timer(session);
460
461                 if (session->input)
462                         hidp_input_report(session, skb);
463
464                 if (session->hid) {
465                         hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
466                         BT_DBG("report len %d", skb->len);
467                 }
468         } else {
469                 BT_DBG("Unsupported protocol header 0x%02x", hdr);
470         }
471
472         kfree_skb(skb);
473 }
474
475 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
476 {
477         struct kvec iv = { data, len };
478         struct msghdr msg;
479
480         BT_DBG("sock %p data %p len %d", sock, data, len);
481
482         if (!len)
483                 return 0;
484
485         memset(&msg, 0, sizeof(msg));
486
487         return kernel_sendmsg(sock, &msg, &iv, 1, len);
488 }
489
490 static void hidp_process_transmit(struct hidp_session *session)
491 {
492         struct sk_buff *skb;
493
494         BT_DBG("session %p", session);
495
496         while ((skb = skb_dequeue(&session->ctrl_transmit))) {
497                 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
498                         skb_queue_head(&session->ctrl_transmit, skb);
499                         break;
500                 }
501
502                 hidp_set_timer(session);
503                 kfree_skb(skb);
504         }
505
506         while ((skb = skb_dequeue(&session->intr_transmit))) {
507                 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
508                         skb_queue_head(&session->intr_transmit, skb);
509                         break;
510                 }
511
512                 hidp_set_timer(session);
513                 kfree_skb(skb);
514         }
515 }
516
517 static int hidp_session(void *arg)
518 {
519         struct hidp_session *session = arg;
520         struct sock *ctrl_sk = session->ctrl_sock->sk;
521         struct sock *intr_sk = session->intr_sock->sk;
522         struct sk_buff *skb;
523         int vendor = 0x0000, product = 0x0000;
524         wait_queue_t ctrl_wait, intr_wait;
525
526         BT_DBG("session %p", session);
527
528         if (session->input) {
529                 vendor  = session->input->id.vendor;
530                 product = session->input->id.product;
531         }
532
533         if (session->hid) {
534                 vendor  = session->hid->vendor;
535                 product = session->hid->product;
536         }
537
538         daemonize("khidpd_%04x%04x", vendor, product);
539         set_user_nice(current, -15);
540
541         init_waitqueue_entry(&ctrl_wait, current);
542         init_waitqueue_entry(&intr_wait, current);
543         add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
544         add_wait_queue(intr_sk->sk_sleep, &intr_wait);
545         while (!atomic_read(&session->terminate)) {
546                 set_current_state(TASK_INTERRUPTIBLE);
547
548                 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED)
549                         break;
550
551                 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
552                         skb_orphan(skb);
553                         hidp_recv_ctrl_frame(session, skb);
554                 }
555
556                 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
557                         skb_orphan(skb);
558                         hidp_recv_intr_frame(session, skb);
559                 }
560
561                 hidp_process_transmit(session);
562
563                 schedule();
564         }
565         set_current_state(TASK_RUNNING);
566         remove_wait_queue(intr_sk->sk_sleep, &intr_wait);
567         remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
568
569         down_write(&hidp_session_sem);
570
571         hidp_del_timer(session);
572
573         if (session->input) {
574                 input_unregister_device(session->input);
575                 session->input = NULL;
576         }
577
578         if (session->hid) {
579                 if (session->hid->claimed & HID_CLAIMED_INPUT)
580                         hidinput_disconnect(session->hid);
581                 hid_free_device(session->hid);
582         }
583
584         fput(session->intr_sock->file);
585
586         wait_event_timeout(*(ctrl_sk->sk_sleep),
587                 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
588
589         fput(session->ctrl_sock->file);
590
591         __hidp_unlink_session(session);
592
593         up_write(&hidp_session_sem);
594
595         kfree(session);
596         return 0;
597 }
598
599 static struct device *hidp_get_device(struct hidp_session *session)
600 {
601         bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
602         bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
603         struct hci_dev *hdev;
604         struct hci_conn *conn;
605
606         hdev = hci_get_route(dst, src);
607         if (!hdev)
608                 return NULL;
609
610         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
611
612         hci_dev_put(hdev);
613
614         return conn ? &conn->dev : NULL;
615 }
616
617 static int hidp_setup_input(struct hidp_session *session,
618                                 struct hidp_connadd_req *req)
619 {
620         struct input_dev *input = session->input;
621         int i;
622
623         input_set_drvdata(input, session);
624
625         input->name = "Bluetooth HID Boot Protocol Device";
626
627         input->id.bustype = BUS_BLUETOOTH;
628         input->id.vendor  = req->vendor;
629         input->id.product = req->product;
630         input->id.version = req->version;
631
632         if (req->subclass & 0x40) {
633                 set_bit(EV_KEY, input->evbit);
634                 set_bit(EV_LED, input->evbit);
635                 set_bit(EV_REP, input->evbit);
636
637                 set_bit(LED_NUML,    input->ledbit);
638                 set_bit(LED_CAPSL,   input->ledbit);
639                 set_bit(LED_SCROLLL, input->ledbit);
640                 set_bit(LED_COMPOSE, input->ledbit);
641                 set_bit(LED_KANA,    input->ledbit);
642
643                 for (i = 0; i < sizeof(hidp_keycode); i++)
644                         set_bit(hidp_keycode[i], input->keybit);
645                 clear_bit(0, input->keybit);
646         }
647
648         if (req->subclass & 0x80) {
649                 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
650                 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
651                         BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
652                 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
653                 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
654                         BIT_MASK(BTN_EXTRA);
655                 input->relbit[0] |= BIT_MASK(REL_WHEEL);
656         }
657
658         input->dev.parent = hidp_get_device(session);
659
660         input->event = hidp_input_event;
661
662         return input_register_device(input);
663 }
664
665 static int hidp_open(struct hid_device *hid)
666 {
667         return 0;
668 }
669
670 static void hidp_close(struct hid_device *hid)
671 {
672 }
673
674 static const struct {
675         __u16 idVendor;
676         __u16 idProduct;
677         unsigned quirks;
678 } hidp_blacklist[] = {
679         /* Apple wireless Mighty Mouse */
680         { 0x05ac, 0x030c, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL },
681
682         { }     /* Terminating entry */
683 };
684
685 static void hidp_setup_quirks(struct hid_device *hid)
686 {
687         unsigned int n;
688
689         for (n = 0; hidp_blacklist[n].idVendor; n++)
690                 if (hidp_blacklist[n].idVendor == le16_to_cpu(hid->vendor) &&
691                                 hidp_blacklist[n].idProduct == le16_to_cpu(hid->product))
692                         hid->quirks = hidp_blacklist[n].quirks;
693 }
694
695 static void hidp_setup_hid(struct hidp_session *session,
696                                 struct hidp_connadd_req *req)
697 {
698         struct hid_device *hid = session->hid;
699         struct hid_report *report;
700         bdaddr_t src, dst;
701
702         baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
703         baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst);
704
705         hid->driver_data = session;
706
707         hid->country = req->country;
708
709         hid->bus     = BUS_BLUETOOTH;
710         hid->vendor  = req->vendor;
711         hid->product = req->product;
712         hid->version = req->version;
713
714         strncpy(hid->name, req->name, 128);
715         strncpy(hid->phys, batostr(&src), 64);
716         strncpy(hid->uniq, batostr(&dst), 64);
717
718         hid->dev = hidp_get_device(session);
719
720         hid->hid_open  = hidp_open;
721         hid->hid_close = hidp_close;
722
723         hid->hidinput_input_event = hidp_hidinput_event;
724
725         hidp_setup_quirks(hid);
726
727         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
728                 hidp_send_report(session, report);
729
730         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
731                 hidp_send_report(session, report);
732
733         if (hidinput_connect(hid) == 0)
734                 hid->claimed |= HID_CLAIMED_INPUT;
735 }
736
737 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
738 {
739         struct hidp_session *session, *s;
740         int err;
741
742         BT_DBG("");
743
744         if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
745                         bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
746                 return -ENOTUNIQ;
747
748         session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
749         if (!session)
750                 return -ENOMEM;
751
752         BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
753
754         if (req->rd_size > 0) {
755                 unsigned char *buf = kmalloc(req->rd_size, GFP_KERNEL);
756
757                 if (!buf) {
758                         kfree(session);
759                         return -ENOMEM;
760                 }
761
762                 if (copy_from_user(buf, req->rd_data, req->rd_size)) {
763                         kfree(buf);
764                         kfree(session);
765                         return -EFAULT;
766                 }
767
768                 session->hid = hid_parse_report(buf, req->rd_size);
769
770                 kfree(buf);
771
772                 if (!session->hid) {
773                         kfree(session);
774                         return -EINVAL;
775                 }
776         }
777
778         if (!session->hid) {
779                 session->input = input_allocate_device();
780                 if (!session->input) {
781                         kfree(session);
782                         return -ENOMEM;
783                 }
784         }
785
786         down_write(&hidp_session_sem);
787
788         s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
789         if (s && s->state == BT_CONNECTED) {
790                 err = -EEXIST;
791                 goto failed;
792         }
793
794         bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
795
796         session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
797         session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
798
799         BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
800
801         session->ctrl_sock = ctrl_sock;
802         session->intr_sock = intr_sock;
803         session->state     = BT_CONNECTED;
804
805         setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session);
806
807         skb_queue_head_init(&session->ctrl_transmit);
808         skb_queue_head_init(&session->intr_transmit);
809
810         session->flags   = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
811         session->idle_to = req->idle_to;
812
813         if (session->input) {
814                 err = hidp_setup_input(session, req);
815                 if (err < 0)
816                         goto failed;
817         }
818
819         if (session->hid)
820                 hidp_setup_hid(session, req);
821
822         __hidp_link_session(session);
823
824         hidp_set_timer(session);
825
826         err = kernel_thread(hidp_session, session, CLONE_KERNEL);
827         if (err < 0)
828                 goto unlink;
829
830         if (session->input) {
831                 hidp_send_ctrl_message(session,
832                         HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
833                 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
834
835                 session->leds = 0xff;
836                 hidp_input_event(session->input, EV_LED, 0, 0);
837         }
838
839         up_write(&hidp_session_sem);
840         return 0;
841
842 unlink:
843         hidp_del_timer(session);
844
845         __hidp_unlink_session(session);
846
847         if (session->input) {
848                 input_unregister_device(session->input);
849                 session->input = NULL; /* don't try to free it here */
850         }
851
852 failed:
853         up_write(&hidp_session_sem);
854
855         if (session->hid)
856                 hid_free_device(session->hid);
857
858         input_free_device(session->input);
859         kfree(session);
860         return err;
861 }
862
863 int hidp_del_connection(struct hidp_conndel_req *req)
864 {
865         struct hidp_session *session;
866         int err = 0;
867
868         BT_DBG("");
869
870         down_read(&hidp_session_sem);
871
872         session = __hidp_get_session(&req->bdaddr);
873         if (session) {
874                 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
875                         hidp_send_ctrl_message(session,
876                                 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
877                 } else {
878                         /* Flush the transmit queues */
879                         skb_queue_purge(&session->ctrl_transmit);
880                         skb_queue_purge(&session->intr_transmit);
881
882                         /* Kill session thread */
883                         atomic_inc(&session->terminate);
884                         hidp_schedule(session);
885                 }
886         } else
887                 err = -ENOENT;
888
889         up_read(&hidp_session_sem);
890         return err;
891 }
892
893 int hidp_get_connlist(struct hidp_connlist_req *req)
894 {
895         struct list_head *p;
896         int err = 0, n = 0;
897
898         BT_DBG("");
899
900         down_read(&hidp_session_sem);
901
902         list_for_each(p, &hidp_session_list) {
903                 struct hidp_session *session;
904                 struct hidp_conninfo ci;
905
906                 session = list_entry(p, struct hidp_session, list);
907
908                 __hidp_copy_session(session, &ci);
909
910                 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
911                         err = -EFAULT;
912                         break;
913                 }
914
915                 if (++n >= req->cnum)
916                         break;
917
918                 req->ci++;
919         }
920         req->cnum = n;
921
922         up_read(&hidp_session_sem);
923         return err;
924 }
925
926 int hidp_get_conninfo(struct hidp_conninfo *ci)
927 {
928         struct hidp_session *session;
929         int err = 0;
930
931         down_read(&hidp_session_sem);
932
933         session = __hidp_get_session(&ci->bdaddr);
934         if (session)
935                 __hidp_copy_session(session, ci);
936         else
937                 err = -ENOENT;
938
939         up_read(&hidp_session_sem);
940         return err;
941 }
942
943 static int __init hidp_init(void)
944 {
945         l2cap_load();
946
947         BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
948
949         return hidp_init_sockets();
950 }
951
952 static void __exit hidp_exit(void)
953 {
954         hidp_cleanup_sockets();
955 }
956
957 module_init(hidp_init);
958 module_exit(hidp_exit);
959
960 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
961 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
962 MODULE_VERSION(VERSION);
963 MODULE_LICENSE("GPL");
964 MODULE_ALIAS("bt-proto-6");