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[ARM] pxa: update defconfig for Verdex Pro
[linux-2.6/verdex.git] / net / bluetooth / hidp / core.c
blob49d8495d69be04bf2948e5467d6115eb0f7aa192
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 #include <linux/hidraw.h>
44
45 #include <net/bluetooth/bluetooth.h>
46 #include <net/bluetooth/hci_core.h>
47 #include <net/bluetooth/l2cap.h>
48
49 #include "hidp.h"
50
51 #define VERSION "1.2"
52
53 static DECLARE_RWSEM(hidp_session_sem);
54 static LIST_HEAD(hidp_session_list);
55
56 static unsigned char hidp_keycode[256] = {
57 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
58 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
59 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
60 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
61 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
62 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
63 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
64 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
65 115,114, 0, 0, 0,121, 0, 89, 93,124, 92, 94, 95, 0, 0, 0,
66 122,123, 90, 91, 85, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
67 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
68 0, 0, 0, 0, 0, 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 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
72 150,158,159,128,136,177,178,176,142,152,173,140
73 };
74
75 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
76
77 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr)
78 {
79 struct hidp_session *session;
80 struct list_head *p;
81
82 BT_DBG("");
83
84 list_for_each(p, &hidp_session_list) {
85 session = list_entry(p, struct hidp_session, list);
86 if (!bacmp(bdaddr, &session->bdaddr))
87 return session;
88 }
89 return NULL;
90 }
91
92 static void __hidp_link_session(struct hidp_session *session)
93 {
94 __module_get(THIS_MODULE);
95 list_add(&session->list, &hidp_session_list);
96
97 hci_conn_hold_device(session->conn);
98 }
99
100 static void __hidp_unlink_session(struct hidp_session *session)
101 {
102 hci_conn_put_device(session->conn);
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 hidp_schedule(session);
383 }
384 }
385
386 static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
387 unsigned char param)
388 {
389 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
390
391 switch (param) {
392 case HIDP_DATA_RTYPE_INPUT:
393 hidp_set_timer(session);
394
395 if (session->input)
396 hidp_input_report(session, skb);
397
398 if (session->hid)
399 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
400
401 break;
402
403 case HIDP_DATA_RTYPE_OTHER:
404 case HIDP_DATA_RTYPE_OUPUT:
405 case HIDP_DATA_RTYPE_FEATURE:
406 break;
407
408 default:
409 __hidp_send_ctrl_message(session,
410 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
411 }
412 }
413
414 static void hidp_recv_ctrl_frame(struct hidp_session *session,
415 struct sk_buff *skb)
416 {
417 unsigned char hdr, type, param;
418
419 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
420
421 hdr = skb->data[0];
422 skb_pull(skb, 1);
423
424 type = hdr & HIDP_HEADER_TRANS_MASK;
425 param = hdr & HIDP_HEADER_PARAM_MASK;
426
427 switch (type) {
428 case HIDP_TRANS_HANDSHAKE:
429 hidp_process_handshake(session, param);
430 break;
431
432 case HIDP_TRANS_HID_CONTROL:
433 hidp_process_hid_control(session, param);
434 break;
435
436 case HIDP_TRANS_DATA:
437 hidp_process_data(session, skb, param);
438 break;
439
440 default:
441 __hidp_send_ctrl_message(session,
442 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
443 break;
444 }
445
446 kfree_skb(skb);
447 }
448
449 static void hidp_recv_intr_frame(struct hidp_session *session,
450 struct sk_buff *skb)
451 {
452 unsigned char hdr;
453
454 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
455
456 hdr = skb->data[0];
457 skb_pull(skb, 1);
458
459 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
460 hidp_set_timer(session);
461
462 if (session->input)
463 hidp_input_report(session, skb);
464
465 if (session->hid) {
466 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
467 BT_DBG("report len %d", skb->len);
468 }
469 } else {
470 BT_DBG("Unsupported protocol header 0x%02x", hdr);
471 }
472
473 kfree_skb(skb);
474 }
475
476 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
477 {
478 struct kvec iv = { data, len };
479 struct msghdr msg;
480
481 BT_DBG("sock %p data %p len %d", sock, data, len);
482
483 if (!len)
484 return 0;
485
486 memset(&msg, 0, sizeof(msg));
487
488 return kernel_sendmsg(sock, &msg, &iv, 1, len);
489 }
490
491 static void hidp_process_transmit(struct hidp_session *session)
492 {
493 struct sk_buff *skb;
494
495 BT_DBG("session %p", session);
496
497 while ((skb = skb_dequeue(&session->ctrl_transmit))) {
498 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
499 skb_queue_head(&session->ctrl_transmit, skb);
500 break;
501 }
502
503 hidp_set_timer(session);
504 kfree_skb(skb);
505 }
506
507 while ((skb = skb_dequeue(&session->intr_transmit))) {
508 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
509 skb_queue_head(&session->intr_transmit, skb);
510 break;
511 }
512
513 hidp_set_timer(session);
514 kfree_skb(skb);
515 }
516 }
517
518 static int hidp_session(void *arg)
519 {
520 struct hidp_session *session = arg;
521 struct sock *ctrl_sk = session->ctrl_sock->sk;
522 struct sock *intr_sk = session->intr_sock->sk;
523 struct sk_buff *skb;
524 int vendor = 0x0000, product = 0x0000;
525 wait_queue_t ctrl_wait, intr_wait;
526
527 BT_DBG("session %p", session);
528
529 if (session->input) {
530 vendor = session->input->id.vendor;
531 product = session->input->id.product;
532 }
533
534 if (session->hid) {
535 vendor = session->hid->vendor;
536 product = session->hid->product;
537 }
538
539 daemonize("khidpd_%04x%04x", vendor, product);
540 set_user_nice(current, -15);
541
542 init_waitqueue_entry(&ctrl_wait, current);
543 init_waitqueue_entry(&intr_wait, current);
544 add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
545 add_wait_queue(intr_sk->sk_sleep, &intr_wait);
546 while (!atomic_read(&session->terminate)) {
547 set_current_state(TASK_INTERRUPTIBLE);
548
549 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED)
550 break;
551
552 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
553 skb_orphan(skb);
554 hidp_recv_ctrl_frame(session, skb);
555 }
556
557 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
558 skb_orphan(skb);
559 hidp_recv_intr_frame(session, skb);
560 }
561
562 hidp_process_transmit(session);
563
564 schedule();
565 }
566 set_current_state(TASK_RUNNING);
567 remove_wait_queue(intr_sk->sk_sleep, &intr_wait);
568 remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
569
570 down_write(&hidp_session_sem);
571
572 hidp_del_timer(session);
573
574 if (session->input) {
575 input_unregister_device(session->input);
576 session->input = NULL;
577 }
578
579 if (session->hid) {
580 hid_destroy_device(session->hid);
581 session->hid = NULL;
582 }
583
584 /* Wakeup user-space polling for socket errors */
585 session->intr_sock->sk->sk_err = EUNATCH;
586 session->ctrl_sock->sk->sk_err = EUNATCH;
587
588 hidp_schedule(session);
589
590 fput(session->intr_sock->file);
591
592 wait_event_timeout(*(ctrl_sk->sk_sleep),
593 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
594
595 fput(session->ctrl_sock->file);
596
597 __hidp_unlink_session(session);
598
599 up_write(&hidp_session_sem);
600
601 kfree(session);
602 return 0;
603 }
604
605 static struct device *hidp_get_device(struct hidp_session *session)
606 {
607 bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
608 bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
609 struct device *device = NULL;
610 struct hci_dev *hdev;
611
612 hdev = hci_get_route(dst, src);
613 if (!hdev)
614 return NULL;
615
616 session->conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
617 if (session->conn)
618 device = &session->conn->dev;
619
620 hci_dev_put(hdev);
621
622 return device;
623 }
624
625 static int hidp_setup_input(struct hidp_session *session,
626 struct hidp_connadd_req *req)
627 {
628 struct input_dev *input;
629 int err, i;
630
631 input = input_allocate_device();
632 if (!input)
633 return -ENOMEM;
634
635 session->input = input;
636
637 input_set_drvdata(input, session);
638
639 input->name = "Bluetooth HID Boot Protocol Device";
640
641 input->id.bustype = BUS_BLUETOOTH;
642 input->id.vendor = req->vendor;
643 input->id.product = req->product;
644 input->id.version = req->version;
645
646 if (req->subclass & 0x40) {
647 set_bit(EV_KEY, input->evbit);
648 set_bit(EV_LED, input->evbit);
649 set_bit(EV_REP, input->evbit);
650
651 set_bit(LED_NUML, input->ledbit);
652 set_bit(LED_CAPSL, input->ledbit);
653 set_bit(LED_SCROLLL, input->ledbit);
654 set_bit(LED_COMPOSE, input->ledbit);
655 set_bit(LED_KANA, input->ledbit);
656
657 for (i = 0; i < sizeof(hidp_keycode); i++)
658 set_bit(hidp_keycode[i], input->keybit);
659 clear_bit(0, input->keybit);
660 }
661
662 if (req->subclass & 0x80) {
663 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
664 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
665 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
666 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
667 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
668 BIT_MASK(BTN_EXTRA);
669 input->relbit[0] |= BIT_MASK(REL_WHEEL);
670 }
671
672 input->dev.parent = hidp_get_device(session);
673
674 input->event = hidp_input_event;
675
676 err = input_register_device(input);
677 if (err < 0) {
678 hci_conn_put_device(session->conn);
679 return err;
680 }
681
682 return 0;
683 }
684
685 static int hidp_open(struct hid_device *hid)
686 {
687 return 0;
688 }
689
690 static void hidp_close(struct hid_device *hid)
691 {
692 }
693
694 static int hidp_parse(struct hid_device *hid)
695 {
696 struct hidp_session *session = hid->driver_data;
697 struct hidp_connadd_req *req = session->req;
698 unsigned char *buf;
699 int ret;
700
701 buf = kmalloc(req->rd_size, GFP_KERNEL);
702 if (!buf)
703 return -ENOMEM;
704
705 if (copy_from_user(buf, req->rd_data, req->rd_size)) {
706 kfree(buf);
707 return -EFAULT;
708 }
709
710 ret = hid_parse_report(session->hid, buf, req->rd_size);
711
712 kfree(buf);
713
714 if (ret)
715 return ret;
716
717 session->req = NULL;
718
719 return 0;
720 }
721
722 static int hidp_start(struct hid_device *hid)
723 {
724 struct hidp_session *session = hid->driver_data;
725 struct hid_report *report;
726
727 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].
728 report_list, list)
729 hidp_send_report(session, report);
730
731 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].
732 report_list, list)
733 hidp_send_report(session, report);
734
735 return 0;
736 }
737
738 static void hidp_stop(struct hid_device *hid)
739 {
740 struct hidp_session *session = hid->driver_data;
741
742 skb_queue_purge(&session->ctrl_transmit);
743 skb_queue_purge(&session->intr_transmit);
744
745 hid->claimed = 0;
746 }
747
748 static struct hid_ll_driver hidp_hid_driver = {
749 .parse = hidp_parse,
750 .start = hidp_start,
751 .stop = hidp_stop,
752 .open = hidp_open,
753 .close = hidp_close,
754 .hidinput_input_event = hidp_hidinput_event,
755 };
756
757 static int hidp_setup_hid(struct hidp_session *session,
758 struct hidp_connadd_req *req)
759 {
760 struct hid_device *hid;
761 bdaddr_t src, dst;
762 int err;
763
764 hid = hid_allocate_device();
765 if (IS_ERR(hid))
766 return PTR_ERR(session->hid);
767
768 session->hid = hid;
769 session->req = req;
770 hid->driver_data = session;
771
772 baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
773 baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst);
774
775 hid->bus = BUS_BLUETOOTH;
776 hid->vendor = req->vendor;
777 hid->product = req->product;
778 hid->version = req->version;
779 hid->country = req->country;
780
781 strncpy(hid->name, req->name, 128);
782 strncpy(hid->phys, batostr(&src), 64);
783 strncpy(hid->uniq, batostr(&dst), 64);
784
785 hid->dev.parent = hidp_get_device(session);
786 hid->ll_driver = &hidp_hid_driver;
787
788 err = hid_add_device(hid);
789 if (err < 0)
790 goto failed;
791
792 return 0;
793
794 failed:
795 hid_destroy_device(hid);
796 session->hid = NULL;
797
798 return err;
799 }
800
801 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
802 {
803 struct hidp_session *session, *s;
804 int err;
805
806 BT_DBG("");
807
808 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
809 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
810 return -ENOTUNIQ;
811
812 session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
813 if (!session)
814 return -ENOMEM;
815
816 BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
817
818 down_write(&hidp_session_sem);
819
820 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
821 if (s && s->state == BT_CONNECTED) {
822 err = -EEXIST;
823 goto failed;
824 }
825
826 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
827
828 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
829 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
830
831 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
832
833 session->ctrl_sock = ctrl_sock;
834 session->intr_sock = intr_sock;
835 session->state = BT_CONNECTED;
836
837 setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session);
838
839 skb_queue_head_init(&session->ctrl_transmit);
840 skb_queue_head_init(&session->intr_transmit);
841
842 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
843 session->idle_to = req->idle_to;
844
845 if (req->rd_size > 0) {
846 err = hidp_setup_hid(session, req);
847 if (err && err != -ENODEV)
848 goto purge;
849 }
850
851 if (!session->hid) {
852 err = hidp_setup_input(session, req);
853 if (err < 0)
854 goto purge;
855 }
856
857 __hidp_link_session(session);
858
859 hidp_set_timer(session);
860
861 err = kernel_thread(hidp_session, session, CLONE_KERNEL);
862 if (err < 0)
863 goto unlink;
864
865 if (session->input) {
866 hidp_send_ctrl_message(session,
867 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
868 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
869
870 session->leds = 0xff;
871 hidp_input_event(session->input, EV_LED, 0, 0);
872 }
873
874 up_write(&hidp_session_sem);
875 return 0;
876
877 unlink:
878 hidp_del_timer(session);
879
880 __hidp_unlink_session(session);
881
882 if (session->input) {
883 input_unregister_device(session->input);
884 session->input = NULL;
885 }
886
887 if (session->hid) {
888 hid_destroy_device(session->hid);
889 session->hid = NULL;
890 }
891
892 purge:
893 skb_queue_purge(&session->ctrl_transmit);
894 skb_queue_purge(&session->intr_transmit);
895
896 failed:
897 up_write(&hidp_session_sem);
898
899 input_free_device(session->input);
900 kfree(session);
901 return err;
902 }
903
904 int hidp_del_connection(struct hidp_conndel_req *req)
905 {
906 struct hidp_session *session;
907 int err = 0;
908
909 BT_DBG("");
910
911 down_read(&hidp_session_sem);
912
913 session = __hidp_get_session(&req->bdaddr);
914 if (session) {
915 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
916 hidp_send_ctrl_message(session,
917 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
918 } else {
919 /* Flush the transmit queues */
920 skb_queue_purge(&session->ctrl_transmit);
921 skb_queue_purge(&session->intr_transmit);
922
923 /* Wakeup user-space polling for socket errors */
924 session->intr_sock->sk->sk_err = EUNATCH;
925 session->ctrl_sock->sk->sk_err = EUNATCH;
926
927 /* Kill session thread */
928 atomic_inc(&session->terminate);
929 hidp_schedule(session);
930 }
931 } else
932 err = -ENOENT;
933
934 up_read(&hidp_session_sem);
935 return err;
936 }
937
938 int hidp_get_connlist(struct hidp_connlist_req *req)
939 {
940 struct list_head *p;
941 int err = 0, n = 0;
942
943 BT_DBG("");
944
945 down_read(&hidp_session_sem);
946
947 list_for_each(p, &hidp_session_list) {
948 struct hidp_session *session;
949 struct hidp_conninfo ci;
950
951 session = list_entry(p, struct hidp_session, list);
952
953 __hidp_copy_session(session, &ci);
954
955 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
956 err = -EFAULT;
957 break;
958 }
959
960 if (++n >= req->cnum)
961 break;
962
963 req->ci++;
964 }
965 req->cnum = n;
966
967 up_read(&hidp_session_sem);
968 return err;
969 }
970
971 int hidp_get_conninfo(struct hidp_conninfo *ci)
972 {
973 struct hidp_session *session;
974 int err = 0;
975
976 down_read(&hidp_session_sem);
977
978 session = __hidp_get_session(&ci->bdaddr);
979 if (session)
980 __hidp_copy_session(session, ci);
981 else
982 err = -ENOENT;
983
984 up_read(&hidp_session_sem);
985 return err;
986 }
987
988 static const struct hid_device_id hidp_table[] = {
989 { HID_BLUETOOTH_DEVICE(HID_ANY_ID, HID_ANY_ID) },
990 { }
991 };
992
993 static struct hid_driver hidp_driver = {
994 .name = "generic-bluetooth",
995 .id_table = hidp_table,
996 };
997
998 static int __init hidp_init(void)
999 {
1000 int ret;
1001
1002 l2cap_load();
1003
1004 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
1005
1006 ret = hid_register_driver(&hidp_driver);
1007 if (ret)
1008 goto err;
1009
1010 ret = hidp_init_sockets();
1011 if (ret)
1012 goto err_drv;
1013
1014 return 0;
1015 err_drv:
1016 hid_unregister_driver(&hidp_driver);
1017 err:
1018 return ret;
1019 }
1020
1021 static void __exit hidp_exit(void)
1022 {
1023 hidp_cleanup_sockets();
1024 hid_unregister_driver(&hidp_driver);
1025 }
1026
1027 module_init(hidp_init);
1028 module_exit(hidp_exit);
1029
1030 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1031 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
1032 MODULE_VERSION(VERSION);
1033 MODULE_LICENSE("GPL");
1034 MODULE_ALIAS("bt-proto-6");
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