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eCryptfs: Fix new inode race condition
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bluetooth / hidp / core.c
blobc405a954a603341b52b51a98592ecccd618398e9
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 <linux/mutex.h>
40 #include <linux/kthread.h>
41 #include <net/sock.h>
42
43 #include <linux/input.h>
44 #include <linux/hid.h>
45 #include <linux/hidraw.h>
46
47 #include <net/bluetooth/bluetooth.h>
48 #include <net/bluetooth/hci_core.h>
49 #include <net/bluetooth/l2cap.h>
50
51 #include "hidp.h"
52
53 #define VERSION "1.2"
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,
60 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45,
61 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1,
62 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52,
63 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88,
64 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69,
65 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73,
66 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190,
67 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135,
68 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94,
69 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0,
70 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,
72 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,
74 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,
76 114, 113, 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 hci_conn_hold_device(session->conn);
102 }
103
104 static void __hidp_unlink_session(struct hidp_session *session)
105 {
106 hci_conn_put_device(session->conn);
107
108 list_del(&session->list);
109 module_put(THIS_MODULE);
110 }
111
112 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
113 {
114 memset(ci, 0, sizeof(*ci));
115 bacpy(&ci->bdaddr, &session->bdaddr);
116
117 ci->flags = session->flags;
118 ci->state = session->state;
119
120 ci->vendor = 0x0000;
121 ci->product = 0x0000;
122 ci->version = 0x0000;
123
124 if (session->input) {
125 ci->vendor = session->input->id.vendor;
126 ci->product = session->input->id.product;
127 ci->version = session->input->id.version;
128 if (session->input->name)
129 strncpy(ci->name, session->input->name, 128);
130 else
131 strncpy(ci->name, "HID Boot Device", 128);
132 }
133
134 if (session->hid) {
135 ci->vendor = session->hid->vendor;
136 ci->product = session->hid->product;
137 ci->version = session->hid->version;
138 strncpy(ci->name, session->hid->name, 128);
139 }
140 }
141
142 static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
143 unsigned int type, unsigned int code, int value)
144 {
145 unsigned char newleds;
146 struct sk_buff *skb;
147
148 BT_DBG("session %p type %d code %d value %d", 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 skb = alloc_skb(3, GFP_ATOMIC);
165 if (!skb) {
166 BT_ERR("Can't allocate memory for new frame");
167 return -ENOMEM;
168 }
169
170 *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
171 *skb_put(skb, 1) = 0x01;
172 *skb_put(skb, 1) = newleds;
173
174 skb_queue_tail(&session->intr_transmit, skb);
175
176 hidp_schedule(session);
177
178 return 0;
179 }
180
181 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
182 {
183 struct hid_device *hid = input_get_drvdata(dev);
184 struct hidp_session *session = hid->driver_data;
185
186 return hidp_queue_event(session, dev, type, code, value);
187 }
188
189 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
190 {
191 struct hidp_session *session = input_get_drvdata(dev);
192
193 return hidp_queue_event(session, dev, type, code, value);
194 }
195
196 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
197 {
198 struct input_dev *dev = session->input;
199 unsigned char *keys = session->keys;
200 unsigned char *udata = skb->data + 1;
201 signed char *sdata = skb->data + 1;
202 int i, size = skb->len - 1;
203
204 switch (skb->data[0]) {
205 case 0x01: /* Keyboard report */
206 for (i = 0; i < 8; i++)
207 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
208
209 /* If all the key codes have been set to 0x01, it means
210 * too many keys were pressed at the same time. */
211 if (!memcmp(udata + 2, hidp_mkeyspat, 6))
212 break;
213
214 for (i = 2; i < 8; i++) {
215 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
216 if (hidp_keycode[keys[i]])
217 input_report_key(dev, hidp_keycode[keys[i]], 0);
218 else
219 BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
220 }
221
222 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
223 if (hidp_keycode[udata[i]])
224 input_report_key(dev, hidp_keycode[udata[i]], 1);
225 else
226 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
227 }
228 }
229
230 memcpy(keys, udata, 8);
231 break;
232
233 case 0x02: /* Mouse report */
234 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01);
235 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02);
236 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
237 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08);
238 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10);
239
240 input_report_rel(dev, REL_X, sdata[1]);
241 input_report_rel(dev, REL_Y, sdata[2]);
242
243 if (size > 3)
244 input_report_rel(dev, REL_WHEEL, sdata[3]);
245 break;
246 }
247
248 input_sync(dev);
249 }
250
251 static int __hidp_send_ctrl_message(struct hidp_session *session,
252 unsigned char hdr, unsigned char *data, int size)
253 {
254 struct sk_buff *skb;
255
256 BT_DBG("session %p data %p size %d", session, data, size);
257
258 skb = alloc_skb(size + 1, GFP_ATOMIC);
259 if (!skb) {
260 BT_ERR("Can't allocate memory for new frame");
261 return -ENOMEM;
262 }
263
264 *skb_put(skb, 1) = hdr;
265 if (data && size > 0)
266 memcpy(skb_put(skb, size), data, size);
267
268 skb_queue_tail(&session->ctrl_transmit, skb);
269
270 return 0;
271 }
272
273 static inline int hidp_send_ctrl_message(struct hidp_session *session,
274 unsigned char hdr, unsigned char *data, int size)
275 {
276 int err;
277
278 err = __hidp_send_ctrl_message(session, hdr, data, size);
279
280 hidp_schedule(session);
281
282 return err;
283 }
284
285 static int hidp_queue_report(struct hidp_session *session,
286 unsigned char *data, int size)
287 {
288 struct sk_buff *skb;
289
290 BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size);
291
292 skb = alloc_skb(size + 1, GFP_ATOMIC);
293 if (!skb) {
294 BT_ERR("Can't allocate memory for new frame");
295 return -ENOMEM;
296 }
297
298 *skb_put(skb, 1) = 0xa2;
299 if (size > 0)
300 memcpy(skb_put(skb, size), data, size);
301
302 skb_queue_tail(&session->intr_transmit, skb);
303
304 hidp_schedule(session);
305
306 return 0;
307 }
308
309 static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
310 {
311 unsigned char buf[32];
312 int rsize;
313
314 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
315 if (rsize > sizeof(buf))
316 return -EIO;
317
318 hid_output_report(report, buf);
319
320 return hidp_queue_report(session, buf, rsize);
321 }
322
323 static int hidp_get_raw_report(struct hid_device *hid,
324 unsigned char report_number,
325 unsigned char *data, size_t count,
326 unsigned char report_type)
327 {
328 struct hidp_session *session = hid->driver_data;
329 struct sk_buff *skb;
330 size_t len;
331 int numbered_reports = hid->report_enum[report_type].numbered;
332
333 switch (report_type) {
334 case HID_FEATURE_REPORT:
335 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE;
336 break;
337 case HID_INPUT_REPORT:
338 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT;
339 break;
340 case HID_OUTPUT_REPORT:
341 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT;
342 break;
343 default:
344 return -EINVAL;
345 }
346
347 if (mutex_lock_interruptible(&session->report_mutex))
348 return -ERESTARTSYS;
349
350 /* Set up our wait, and send the report request to the device. */
351 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK;
352 session->waiting_report_number = numbered_reports ? report_number : -1;
353 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
354 data[0] = report_number;
355 if (hidp_send_ctrl_message(hid->driver_data, report_type, data, 1))
356 goto err_eio;
357
358 /* Wait for the return of the report. The returned report
359 gets put in session->report_return. */
360 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) {
361 int res;
362
363 res = wait_event_interruptible_timeout(session->report_queue,
364 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags),
365 5*HZ);
366 if (res == 0) {
367 /* timeout */
368 goto err_eio;
369 }
370 if (res < 0) {
371 /* signal */
372 goto err_restartsys;
373 }
374 }
375
376 skb = session->report_return;
377 if (skb) {
378 len = skb->len < count ? skb->len : count;
379 memcpy(data, skb->data, len);
380
381 kfree_skb(skb);
382 session->report_return = NULL;
383 } else {
384 /* Device returned a HANDSHAKE, indicating protocol error. */
385 len = -EIO;
386 }
387
388 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
389 mutex_unlock(&session->report_mutex);
390
391 return len;
392
393 err_restartsys:
394 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
395 mutex_unlock(&session->report_mutex);
396 return -ERESTARTSYS;
397 err_eio:
398 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
399 mutex_unlock(&session->report_mutex);
400 return -EIO;
401 }
402
403 static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
404 unsigned char report_type)
405 {
406 struct hidp_session *session = hid->driver_data;
407 int ret;
408
409 switch (report_type) {
410 case HID_FEATURE_REPORT:
411 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
412 break;
413 case HID_OUTPUT_REPORT:
414 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT;
415 break;
416 default:
417 return -EINVAL;
418 }
419
420 if (mutex_lock_interruptible(&session->report_mutex))
421 return -ERESTARTSYS;
422
423 /* Set up our wait, and send the report request to the device. */
424 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
425 if (hidp_send_ctrl_message(hid->driver_data, report_type,
426 data, count)) {
427 ret = -ENOMEM;
428 goto err;
429 }
430
431 /* Wait for the ACK from the device. */
432 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) {
433 int res;
434
435 res = wait_event_interruptible_timeout(session->report_queue,
436 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags),
437 10*HZ);
438 if (res == 0) {
439 /* timeout */
440 ret = -EIO;
441 goto err;
442 }
443 if (res < 0) {
444 /* signal */
445 ret = -ERESTARTSYS;
446 goto err;
447 }
448 }
449
450 if (!session->output_report_success) {
451 ret = -EIO;
452 goto err;
453 }
454
455 ret = count;
456
457 err:
458 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
459 mutex_unlock(&session->report_mutex);
460 return ret;
461 }
462
463 static void hidp_idle_timeout(unsigned long arg)
464 {
465 struct hidp_session *session = (struct hidp_session *) arg;
466
467 kthread_stop(session->task);
468 }
469
470 static void hidp_set_timer(struct hidp_session *session)
471 {
472 if (session->idle_to > 0)
473 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
474 }
475
476 static inline void hidp_del_timer(struct hidp_session *session)
477 {
478 if (session->idle_to > 0)
479 del_timer(&session->timer);
480 }
481
482 static void hidp_process_handshake(struct hidp_session *session,
483 unsigned char param)
484 {
485 BT_DBG("session %p param 0x%02x", session, param);
486 session->output_report_success = 0; /* default condition */
487
488 switch (param) {
489 case HIDP_HSHK_SUCCESSFUL:
490 /* FIXME: Call into SET_ GET_ handlers here */
491 session->output_report_success = 1;
492 break;
493
494 case HIDP_HSHK_NOT_READY:
495 case HIDP_HSHK_ERR_INVALID_REPORT_ID:
496 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
497 case HIDP_HSHK_ERR_INVALID_PARAMETER:
498 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) {
499 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
500 wake_up_interruptible(&session->report_queue);
501 }
502 /* FIXME: Call into SET_ GET_ handlers here */
503 break;
504
505 case HIDP_HSHK_ERR_UNKNOWN:
506 break;
507
508 case HIDP_HSHK_ERR_FATAL:
509 /* Device requests a reboot, as this is the only way this error
510 * can be recovered. */
511 __hidp_send_ctrl_message(session,
512 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
513 break;
514
515 default:
516 __hidp_send_ctrl_message(session,
517 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
518 break;
519 }
520
521 /* Wake up the waiting thread. */
522 if (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) {
523 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags);
524 wake_up_interruptible(&session->report_queue);
525 }
526 }
527
528 static void hidp_process_hid_control(struct hidp_session *session,
529 unsigned char param)
530 {
531 BT_DBG("session %p param 0x%02x", session, param);
532
533 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
534 /* Flush the transmit queues */
535 skb_queue_purge(&session->ctrl_transmit);
536 skb_queue_purge(&session->intr_transmit);
537
538 kthread_stop(session->task);
539 }
540 }
541
542 /* Returns true if the passed-in skb should be freed by the caller. */
543 static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
544 unsigned char param)
545 {
546 int done_with_skb = 1;
547 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
548
549 switch (param) {
550 case HIDP_DATA_RTYPE_INPUT:
551 hidp_set_timer(session);
552
553 if (session->input)
554 hidp_input_report(session, skb);
555
556 if (session->hid)
557 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
558 break;
559
560 case HIDP_DATA_RTYPE_OTHER:
561 case HIDP_DATA_RTYPE_OUPUT:
562 case HIDP_DATA_RTYPE_FEATURE:
563 break;
564
565 default:
566 __hidp_send_ctrl_message(session,
567 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
568 }
569
570 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) &&
571 param == session->waiting_report_type) {
572 if (session->waiting_report_number < 0 ||
573 session->waiting_report_number == skb->data[0]) {
574 /* hidp_get_raw_report() is waiting on this report. */
575 session->report_return = skb;
576 done_with_skb = 0;
577 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags);
578 wake_up_interruptible(&session->report_queue);
579 }
580 }
581
582 return done_with_skb;
583 }
584
585 static void hidp_recv_ctrl_frame(struct hidp_session *session,
586 struct sk_buff *skb)
587 {
588 unsigned char hdr, type, param;
589 int free_skb = 1;
590
591 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
592
593 hdr = skb->data[0];
594 skb_pull(skb, 1);
595
596 type = hdr & HIDP_HEADER_TRANS_MASK;
597 param = hdr & HIDP_HEADER_PARAM_MASK;
598
599 switch (type) {
600 case HIDP_TRANS_HANDSHAKE:
601 hidp_process_handshake(session, param);
602 break;
603
604 case HIDP_TRANS_HID_CONTROL:
605 hidp_process_hid_control(session, param);
606 break;
607
608 case HIDP_TRANS_DATA:
609 free_skb = hidp_process_data(session, skb, param);
610 break;
611
612 default:
613 __hidp_send_ctrl_message(session,
614 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
615 break;
616 }
617
618 if (free_skb)
619 kfree_skb(skb);
620 }
621
622 static void hidp_recv_intr_frame(struct hidp_session *session,
623 struct sk_buff *skb)
624 {
625 unsigned char hdr;
626
627 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
628
629 hdr = skb->data[0];
630 skb_pull(skb, 1);
631
632 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
633 hidp_set_timer(session);
634
635 if (session->input)
636 hidp_input_report(session, skb);
637
638 if (session->hid) {
639 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
640 BT_DBG("report len %d", skb->len);
641 }
642 } else {
643 BT_DBG("Unsupported protocol header 0x%02x", hdr);
644 }
645
646 kfree_skb(skb);
647 }
648
649 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
650 {
651 struct kvec iv = { data, len };
652 struct msghdr msg;
653
654 BT_DBG("sock %p data %p len %d", sock, data, len);
655
656 if (!len)
657 return 0;
658
659 memset(&msg, 0, sizeof(msg));
660
661 return kernel_sendmsg(sock, &msg, &iv, 1, len);
662 }
663
664 static void hidp_process_transmit(struct hidp_session *session)
665 {
666 struct sk_buff *skb;
667
668 BT_DBG("session %p", session);
669
670 while ((skb = skb_dequeue(&session->ctrl_transmit))) {
671 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
672 skb_queue_head(&session->ctrl_transmit, skb);
673 break;
674 }
675
676 hidp_set_timer(session);
677 kfree_skb(skb);
678 }
679
680 while ((skb = skb_dequeue(&session->intr_transmit))) {
681 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
682 skb_queue_head(&session->intr_transmit, skb);
683 break;
684 }
685
686 hidp_set_timer(session);
687 kfree_skb(skb);
688 }
689 }
690
691 static int hidp_session(void *arg)
692 {
693 struct hidp_session *session = arg;
694 struct sock *ctrl_sk = session->ctrl_sock->sk;
695 struct sock *intr_sk = session->intr_sock->sk;
696 struct sk_buff *skb;
697 wait_queue_t ctrl_wait, intr_wait;
698
699 BT_DBG("session %p", session);
700
701 set_user_nice(current, -15);
702
703 init_waitqueue_entry(&ctrl_wait, current);
704 init_waitqueue_entry(&intr_wait, current);
705 add_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait);
706 add_wait_queue(sk_sleep(intr_sk), &intr_wait);
707 session->waiting_for_startup = 0;
708 wake_up_interruptible(&session->startup_queue);
709 while (!kthread_should_stop()) {
710 set_current_state(TASK_INTERRUPTIBLE);
711
712 if (ctrl_sk->sk_state != BT_CONNECTED ||
713 intr_sk->sk_state != BT_CONNECTED)
714 break;
715
716 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
717 skb_orphan(skb);
718 hidp_recv_ctrl_frame(session, skb);
719 }
720
721 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
722 skb_orphan(skb);
723 hidp_recv_intr_frame(session, skb);
724 }
725
726 hidp_process_transmit(session);
727
728 schedule();
729 }
730 set_current_state(TASK_RUNNING);
731 remove_wait_queue(sk_sleep(intr_sk), &intr_wait);
732 remove_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait);
733
734 down_write(&hidp_session_sem);
735
736 hidp_del_timer(session);
737
738 if (session->input) {
739 input_unregister_device(session->input);
740 session->input = NULL;
741 }
742
743 if (session->hid) {
744 hid_destroy_device(session->hid);
745 session->hid = NULL;
746 }
747
748 /* Wakeup user-space polling for socket errors */
749 session->intr_sock->sk->sk_err = EUNATCH;
750 session->ctrl_sock->sk->sk_err = EUNATCH;
751
752 hidp_schedule(session);
753
754 fput(session->intr_sock->file);
755
756 wait_event_timeout(*(sk_sleep(ctrl_sk)),
757 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
758
759 fput(session->ctrl_sock->file);
760
761 __hidp_unlink_session(session);
762
763 up_write(&hidp_session_sem);
764
765 kfree(session);
766 return 0;
767 }
768
769 static struct device *hidp_get_device(struct hidp_session *session)
770 {
771 bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
772 bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
773 struct device *device = NULL;
774 struct hci_dev *hdev;
775
776 hdev = hci_get_route(dst, src);
777 if (!hdev)
778 return NULL;
779
780 session->conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
781 if (session->conn)
782 device = &session->conn->dev;
783
784 hci_dev_put(hdev);
785
786 return device;
787 }
788
789 static int hidp_setup_input(struct hidp_session *session,
790 struct hidp_connadd_req *req)
791 {
792 struct input_dev *input;
793 int err, i;
794
795 input = input_allocate_device();
796 if (!input)
797 return -ENOMEM;
798
799 session->input = input;
800
801 input_set_drvdata(input, session);
802
803 input->name = "Bluetooth HID Boot Protocol Device";
804
805 input->id.bustype = BUS_BLUETOOTH;
806 input->id.vendor = req->vendor;
807 input->id.product = req->product;
808 input->id.version = req->version;
809
810 if (req->subclass & 0x40) {
811 set_bit(EV_KEY, input->evbit);
812 set_bit(EV_LED, input->evbit);
813 set_bit(EV_REP, input->evbit);
814
815 set_bit(LED_NUML, input->ledbit);
816 set_bit(LED_CAPSL, input->ledbit);
817 set_bit(LED_SCROLLL, input->ledbit);
818 set_bit(LED_COMPOSE, input->ledbit);
819 set_bit(LED_KANA, input->ledbit);
820
821 for (i = 0; i < sizeof(hidp_keycode); i++)
822 set_bit(hidp_keycode[i], input->keybit);
823 clear_bit(0, input->keybit);
824 }
825
826 if (req->subclass & 0x80) {
827 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
828 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
829 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
830 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
831 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
832 BIT_MASK(BTN_EXTRA);
833 input->relbit[0] |= BIT_MASK(REL_WHEEL);
834 }
835
836 input->dev.parent = hidp_get_device(session);
837
838 input->event = hidp_input_event;
839
840 err = input_register_device(input);
841 if (err < 0) {
842 hci_conn_put_device(session->conn);
843 return err;
844 }
845
846 return 0;
847 }
848
849 static int hidp_open(struct hid_device *hid)
850 {
851 return 0;
852 }
853
854 static void hidp_close(struct hid_device *hid)
855 {
856 }
857
858 static int hidp_parse(struct hid_device *hid)
859 {
860 struct hidp_session *session = hid->driver_data;
861
862 return hid_parse_report(session->hid, session->rd_data,
863 session->rd_size);
864 }
865
866 static int hidp_start(struct hid_device *hid)
867 {
868 struct hidp_session *session = hid->driver_data;
869 struct hid_report *report;
870
871 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].
872 report_list, list)
873 hidp_send_report(session, report);
874
875 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].
876 report_list, list)
877 hidp_send_report(session, report);
878
879 return 0;
880 }
881
882 static void hidp_stop(struct hid_device *hid)
883 {
884 struct hidp_session *session = hid->driver_data;
885
886 skb_queue_purge(&session->ctrl_transmit);
887 skb_queue_purge(&session->intr_transmit);
888
889 hid->claimed = 0;
890 }
891
892 static struct hid_ll_driver hidp_hid_driver = {
893 .parse = hidp_parse,
894 .start = hidp_start,
895 .stop = hidp_stop,
896 .open = hidp_open,
897 .close = hidp_close,
898 .hidinput_input_event = hidp_hidinput_event,
899 };
900
901 /* This function sets up the hid device. It does not add it
902 to the HID system. That is done in hidp_add_connection(). */
903 static int hidp_setup_hid(struct hidp_session *session,
904 struct hidp_connadd_req *req)
905 {
906 struct hid_device *hid;
907 int err;
908
909 session->rd_data = kzalloc(req->rd_size, GFP_KERNEL);
910 if (!session->rd_data)
911 return -ENOMEM;
912
913 if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) {
914 err = -EFAULT;
915 goto fault;
916 }
917 session->rd_size = req->rd_size;
918
919 hid = hid_allocate_device();
920 if (IS_ERR(hid)) {
921 err = PTR_ERR(hid);
922 goto fault;
923 }
924
925 session->hid = hid;
926
927 hid->driver_data = session;
928
929 hid->bus = BUS_BLUETOOTH;
930 hid->vendor = req->vendor;
931 hid->product = req->product;
932 hid->version = req->version;
933 hid->country = req->country;
934
935 strncpy(hid->name, req->name, 128);
936 strncpy(hid->phys, batostr(&bt_sk(session->ctrl_sock->sk)->src), 64);
937 strncpy(hid->uniq, batostr(&bt_sk(session->ctrl_sock->sk)->dst), 64);
938
939 hid->dev.parent = hidp_get_device(session);
940 hid->ll_driver = &hidp_hid_driver;
941
942 hid->hid_get_raw_report = hidp_get_raw_report;
943 hid->hid_output_raw_report = hidp_output_raw_report;
944
945 return 0;
946
947 fault:
948 kfree(session->rd_data);
949 session->rd_data = NULL;
950
951 return err;
952 }
953
954 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
955 {
956 struct hidp_session *session, *s;
957 int vendor, product;
958 int err;
959
960 BT_DBG("");
961
962 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
963 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
964 return -ENOTUNIQ;
965
966 session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
967 if (!session)
968 return -ENOMEM;
969
970 BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
971
972 down_write(&hidp_session_sem);
973
974 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
975 if (s && s->state == BT_CONNECTED) {
976 err = -EEXIST;
977 goto failed;
978 }
979
980 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
981
982 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->chan->omtu,
983 l2cap_pi(ctrl_sock->sk)->chan->imtu);
984 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->chan->omtu,
985 l2cap_pi(intr_sock->sk)->chan->imtu);
986
987 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
988
989 session->ctrl_sock = ctrl_sock;
990 session->intr_sock = intr_sock;
991 session->state = BT_CONNECTED;
992
993 setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session);
994
995 skb_queue_head_init(&session->ctrl_transmit);
996 skb_queue_head_init(&session->intr_transmit);
997
998 mutex_init(&session->report_mutex);
999 init_waitqueue_head(&session->report_queue);
1000 init_waitqueue_head(&session->startup_queue);
1001 session->waiting_for_startup = 1;
1002 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
1003 session->idle_to = req->idle_to;
1004
1005 if (req->rd_size > 0) {
1006 err = hidp_setup_hid(session, req);
1007 if (err && err != -ENODEV)
1008 goto purge;
1009 }
1010
1011 if (!session->hid) {
1012 err = hidp_setup_input(session, req);
1013 if (err < 0)
1014 goto purge;
1015 }
1016
1017 __hidp_link_session(session);
1018
1019 hidp_set_timer(session);
1020
1021 if (session->hid) {
1022 vendor = session->hid->vendor;
1023 product = session->hid->product;
1024 } else if (session->input) {
1025 vendor = session->input->id.vendor;
1026 product = session->input->id.product;
1027 } else {
1028 vendor = 0x0000;
1029 product = 0x0000;
1030 }
1031
1032 session->task = kthread_run(hidp_session, session, "khidpd_%04x%04x",
1033 vendor, product);
1034 if (IS_ERR(session->task)) {
1035 err = PTR_ERR(session->task);
1036 goto unlink;
1037 }
1038
1039 while (session->waiting_for_startup) {
1040 wait_event_interruptible(session->startup_queue,
1041 !session->waiting_for_startup);
1042 }
1043
1044 err = hid_add_device(session->hid);
1045 if (err < 0)
1046 goto err_add_device;
1047
1048 if (session->input) {
1049 hidp_send_ctrl_message(session,
1050 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
1051 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
1052
1053 session->leds = 0xff;
1054 hidp_input_event(session->input, EV_LED, 0, 0);
1055 }
1056
1057 up_write(&hidp_session_sem);
1058 return 0;
1059
1060 err_add_device:
1061 hid_destroy_device(session->hid);
1062 session->hid = NULL;
1063 kthread_stop(session->task);
1064
1065 unlink:
1066 hidp_del_timer(session);
1067
1068 __hidp_unlink_session(session);
1069
1070 if (session->input) {
1071 input_unregister_device(session->input);
1072 session->input = NULL;
1073 }
1074
1075 if (session->hid) {
1076 hid_destroy_device(session->hid);
1077 session->hid = NULL;
1078 }
1079
1080 kfree(session->rd_data);
1081 session->rd_data = NULL;
1082
1083 purge:
1084 skb_queue_purge(&session->ctrl_transmit);
1085 skb_queue_purge(&session->intr_transmit);
1086
1087 failed:
1088 up_write(&hidp_session_sem);
1089
1090 input_free_device(session->input);
1091 kfree(session);
1092 return err;
1093 }
1094
1095 int hidp_del_connection(struct hidp_conndel_req *req)
1096 {
1097 struct hidp_session *session;
1098 int err = 0;
1099
1100 BT_DBG("");
1101
1102 down_read(&hidp_session_sem);
1103
1104 session = __hidp_get_session(&req->bdaddr);
1105 if (session) {
1106 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
1107 hidp_send_ctrl_message(session,
1108 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
1109 } else {
1110 /* Flush the transmit queues */
1111 skb_queue_purge(&session->ctrl_transmit);
1112 skb_queue_purge(&session->intr_transmit);
1113
1114 kthread_stop(session->task);
1115 }
1116 } else
1117 err = -ENOENT;
1118
1119 up_read(&hidp_session_sem);
1120 return err;
1121 }
1122
1123 int hidp_get_connlist(struct hidp_connlist_req *req)
1124 {
1125 struct list_head *p;
1126 int err = 0, n = 0;
1127
1128 BT_DBG("");
1129
1130 down_read(&hidp_session_sem);
1131
1132 list_for_each(p, &hidp_session_list) {
1133 struct hidp_session *session;
1134 struct hidp_conninfo ci;
1135
1136 session = list_entry(p, struct hidp_session, list);
1137
1138 __hidp_copy_session(session, &ci);
1139
1140 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
1141 err = -EFAULT;
1142 break;
1143 }
1144
1145 if (++n >= req->cnum)
1146 break;
1147
1148 req->ci++;
1149 }
1150 req->cnum = n;
1151
1152 up_read(&hidp_session_sem);
1153 return err;
1154 }
1155
1156 int hidp_get_conninfo(struct hidp_conninfo *ci)
1157 {
1158 struct hidp_session *session;
1159 int err = 0;
1160
1161 down_read(&hidp_session_sem);
1162
1163 session = __hidp_get_session(&ci->bdaddr);
1164 if (session)
1165 __hidp_copy_session(session, ci);
1166 else
1167 err = -ENOENT;
1168
1169 up_read(&hidp_session_sem);
1170 return err;
1171 }
1172
1173 static const struct hid_device_id hidp_table[] = {
1174 { HID_BLUETOOTH_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1175 { }
1176 };
1177
1178 static struct hid_driver hidp_driver = {
1179 .name = "generic-bluetooth",
1180 .id_table = hidp_table,
1181 };
1182
1183 static int __init hidp_init(void)
1184 {
1185 int ret;
1186
1187 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
1188
1189 ret = hid_register_driver(&hidp_driver);
1190 if (ret)
1191 goto err;
1192
1193 ret = hidp_init_sockets();
1194 if (ret)
1195 goto err_drv;
1196
1197 return 0;
1198 err_drv:
1199 hid_unregister_driver(&hidp_driver);
1200 err:
1201 return ret;
1202 }
1203
1204 static void __exit hidp_exit(void)
1205 {
1206 hidp_cleanup_sockets();
1207 hid_unregister_driver(&hidp_driver);
1208 }
1209
1210 module_init(hidp_init);
1211 module_exit(hidp_exit);
1212
1213 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1214 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
1215 MODULE_VERSION(VERSION);
1216 MODULE_LICENSE("GPL");
1217 MODULE_ALIAS("bt-proto-6");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree