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Freezer: make kernel threads nonfreezable by default
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hidp / core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 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
8e87d142
YH		 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
1da177e4
LT		 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
8e87d142
YH		 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 20 SOFTWARE IS DISCLAIMED.
21*/
22
1da177e4
LT		 23#include <linux/module.h>
24
25#include <linux/types.h>
26#include <linux/errno.h>
27#include <linux/kernel.h>
1da177e4
LT		 28#include <linux/sched.h>
29#include <linux/slab.h>
30#include <linux/poll.h>
83144186 31#include <linux/freezer.h>
1da177e4
LT		 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>
e1aaadd4 42#include <linux/hid.h>
1da177e4
LT		 43
44#include <net/bluetooth/bluetooth.h>
0a85b964 45#include <net/bluetooth/hci_core.h>
1da177e4
LT		 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
e1aaadd4 55#define VERSION "1.2"
1da177e4
LT		 56
57static DECLARE_RWSEM(hidp_session_sem);
58static LIST_HEAD(hidp_session_list);
59
60static 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
79static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
80
81static 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
96static void __hidp_link_session(struct hidp_session *session)
97{
98 __module_get(THIS_MODULE);
99 list_add(&session->list, &hidp_session_list);
100}
101
102static void __hidp_unlink_session(struct hidp_session *session)
103{
104 list_del(&session->list);
105 module_put(THIS_MODULE);
106}
107
108static 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 }
e1aaadd4
MH		 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 }
1da177e4
LT		 136}
137
e1aaadd4
MH		 138static inline int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
139 unsigned int type, unsigned int code, int value)
1da177e4 140{
1da177e4 141 unsigned char newleds;
e1aaadd4 142 struct sk_buff *skb;
1da177e4 143
e1aaadd4 144 BT_DBG("session %p type %d code %d value %d", session, type, code, value);
1da177e4
LT		 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
e1aaadd4
MH		 176static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
177{
5be39466 178 struct hid_device *hid = input_get_drvdata(dev);
e1aaadd4
MH		 179 struct hidp_session *session = hid->driver_data;
180
181 return hidp_queue_event(session, dev, type, code, value);
182}
183
184static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
185{
5be39466 186 struct hidp_session *session = input_get_drvdata(dev);
e1aaadd4
MH		 187
188 return hidp_queue_event(session, dev, type, code, value);
189}
190
1da177e4
LT		 191static 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
e1aaadd4
MH		 246static inline int hidp_queue_report(struct hidp_session *session, unsigned char *data, int size)
247{
248 struct sk_buff *skb;
249
250 BT_DBG("session %p hid %p data %p size %d", session, device, data, size);
251
252 if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
253 BT_ERR("Can't allocate memory for new frame");
254 return -ENOMEM;
255 }
256
257 *skb_put(skb, 1) = 0xa2;
258 if (size > 0)
259 memcpy(skb_put(skb, size), data, size);
260
261 skb_queue_tail(&session->intr_transmit, skb);
262
263 hidp_schedule(session);
264
265 return 0;
266}
267
268static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
269{
270 unsigned char buf[32];
271 int rsize;
272
273 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
274 if (rsize > sizeof(buf))
275 return -EIO;
276
277 hid_output_report(report, buf);
278
279 return hidp_queue_report(session, buf, rsize);
280}
281
1da177e4
LT		 282static void hidp_idle_timeout(unsigned long arg)
283{
284 struct hidp_session *session = (struct hidp_session *) arg;
285
286 atomic_inc(&session->terminate);
287 hidp_schedule(session);
288}
289
290static inline void hidp_set_timer(struct hidp_session *session)
291{
292 if (session->idle_to > 0)
293 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
294}
295
296static inline void hidp_del_timer(struct hidp_session *session)
297{
298 if (session->idle_to > 0)
299 del_timer(&session->timer);
300}
301
302static int __hidp_send_ctrl_message(struct hidp_session *session,
303 unsigned char hdr, unsigned char *data, int size)
304{
305 struct sk_buff *skb;
306
307 BT_DBG("session %p data %p size %d", session, data, size);
308
309 if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
310 BT_ERR("Can't allocate memory for new frame");
311 return -ENOMEM;
312 }
313
314 *skb_put(skb, 1) = hdr;
315 if (data && size > 0)
316 memcpy(skb_put(skb, size), data, size);
317
318 skb_queue_tail(&session->ctrl_transmit, skb);
319
320 return 0;
321}
322
b6f99a21 323static inline int hidp_send_ctrl_message(struct hidp_session *session,
1da177e4
LT		 324 unsigned char hdr, unsigned char *data, int size)
325{
326 int err;
327
328 err = __hidp_send_ctrl_message(session, hdr, data, size);
329
330 hidp_schedule(session);
331
332 return err;
333}
334
335static inline void hidp_process_handshake(struct hidp_session *session, unsigned char param)
336{
337 BT_DBG("session %p param 0x%02x", session, param);
338
339 switch (param) {
340 case HIDP_HSHK_SUCCESSFUL:
341 /* FIXME: Call into SET_ GET_ handlers here */
342 break;
343
344 case HIDP_HSHK_NOT_READY:
345 case HIDP_HSHK_ERR_INVALID_REPORT_ID:
346 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
347 case HIDP_HSHK_ERR_INVALID_PARAMETER:
348 /* FIXME: Call into SET_ GET_ handlers here */
349 break;
350
351 case HIDP_HSHK_ERR_UNKNOWN:
352 break;
353
354 case HIDP_HSHK_ERR_FATAL:
355 /* Device requests a reboot, as this is the only way this error
8e87d142 356 * can be recovered. */
1da177e4
LT		 357 __hidp_send_ctrl_message(session,
358 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
359 break;
360
361 default:
362 __hidp_send_ctrl_message(session,
363 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
364 break;
365 }
366}
367
368static inline void hidp_process_hid_control(struct hidp_session *session, unsigned char param)
369{
370 BT_DBG("session %p param 0x%02x", session, param);
371
372 switch (param) {
373 case HIDP_CTRL_NOP:
374 break;
375
376 case HIDP_CTRL_VIRTUAL_CABLE_UNPLUG:
377 /* Flush the transmit queues */
378 skb_queue_purge(&session->ctrl_transmit);
379 skb_queue_purge(&session->intr_transmit);
380
381 /* Kill session thread */
382 atomic_inc(&session->terminate);
383 break;
384
385 case HIDP_CTRL_HARD_RESET:
386 case HIDP_CTRL_SOFT_RESET:
387 case HIDP_CTRL_SUSPEND:
388 case HIDP_CTRL_EXIT_SUSPEND:
389 /* FIXME: We have to parse these and return no error */
390 break;
391
392 default:
393 __hidp_send_ctrl_message(session,
394 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
395 break;
396 }
397}
398
399static inline void hidp_process_data(struct hidp_session *session, struct sk_buff *skb, unsigned char param)
400{
401 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
402
403 switch (param) {
404 case HIDP_DATA_RTYPE_INPUT:
405 hidp_set_timer(session);
406
407 if (session->input)
408 hidp_input_report(session, skb);
e1aaadd4
MH		 409
410 if (session->hid)
411 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
412
1da177e4
LT		 413 break;
414
415 case HIDP_DATA_RTYPE_OTHER:
416 case HIDP_DATA_RTYPE_OUPUT:
417 case HIDP_DATA_RTYPE_FEATURE:
418 break;
419
420 default:
421 __hidp_send_ctrl_message(session,
422 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
423 }
424}
425
426static inline void hidp_recv_ctrl_frame(struct hidp_session *session, struct sk_buff *skb)
427{
428 unsigned char hdr, type, param;
429
430 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
431
432 hdr = skb->data[0];
433 skb_pull(skb, 1);
434
435 type = hdr & HIDP_HEADER_TRANS_MASK;
436 param = hdr & HIDP_HEADER_PARAM_MASK;
437
438 switch (type) {
439 case HIDP_TRANS_HANDSHAKE:
440 hidp_process_handshake(session, param);
441 break;
442
443 case HIDP_TRANS_HID_CONTROL:
444 hidp_process_hid_control(session, param);
445 break;
446
447 case HIDP_TRANS_DATA:
448 hidp_process_data(session, skb, param);
449 break;
450
451 default:
452 __hidp_send_ctrl_message(session,
453 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
454 break;
455 }
456
457 kfree_skb(skb);
458}
459
460static inline void hidp_recv_intr_frame(struct hidp_session *session, struct sk_buff *skb)
461{
462 unsigned char hdr;
463
464 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
465
466 hdr = skb->data[0];
467 skb_pull(skb, 1);
468
469 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
470 hidp_set_timer(session);
e1aaadd4 471
1da177e4
LT		 472 if (session->input)
473 hidp_input_report(session, skb);
e1aaadd4
MH		 474
475 if (session->hid) {
476 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
477 BT_DBG("report len %d", skb->len);
478 }
1da177e4
LT		 479 } else {
480 BT_DBG("Unsupported protocol header 0x%02x", hdr);
481 }
482
483 kfree_skb(skb);
484}
485
486static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
487{
488 struct kvec iv = { data, len };
489 struct msghdr msg;
490
491 BT_DBG("sock %p data %p len %d", sock, data, len);
492
493 if (!len)
494 return 0;
495
496 memset(&msg, 0, sizeof(msg));
497
498 return kernel_sendmsg(sock, &msg, &iv, 1, len);
499}
500
b03efcfb 501static void hidp_process_transmit(struct hidp_session *session)
1da177e4
LT		 502{
503 struct sk_buff *skb;
504
505 BT_DBG("session %p", session);
506
507 while ((skb = skb_dequeue(&session->ctrl_transmit))) {
508 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
509 skb_queue_head(&session->ctrl_transmit, skb);
510 break;
511 }
512
513 hidp_set_timer(session);
514 kfree_skb(skb);
515 }
516
517 while ((skb = skb_dequeue(&session->intr_transmit))) {
518 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
519 skb_queue_head(&session->intr_transmit, skb);
520 break;
521 }
522
523 hidp_set_timer(session);
524 kfree_skb(skb);
525 }
1da177e4
LT		 526}
527
528static int hidp_session(void *arg)
529{
530 struct hidp_session *session = arg;
531 struct sock *ctrl_sk = session->ctrl_sock->sk;
532 struct sock *intr_sk = session->intr_sock->sk;
533 struct sk_buff *skb;
534 int vendor = 0x0000, product = 0x0000;
535 wait_queue_t ctrl_wait, intr_wait;
536
537 BT_DBG("session %p", session);
538
539 if (session->input) {
540 vendor = session->input->id.vendor;
541 product = session->input->id.product;
542 }
543
e1aaadd4
MH		 544 if (session->hid) {
545 vendor = session->hid->vendor;
546 product = session->hid->product;
547 }
548
1da177e4
LT		 549 daemonize("khidpd_%04x%04x", vendor, product);
550 set_user_nice(current, -15);
1da177e4
LT		 551
552 init_waitqueue_entry(&ctrl_wait, current);
553 init_waitqueue_entry(&intr_wait, current);
554 add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
555 add_wait_queue(intr_sk->sk_sleep, &intr_wait);
556 while (!atomic_read(&session->terminate)) {
557 set_current_state(TASK_INTERRUPTIBLE);
558
559 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED)
560 break;
561
562 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
563 skb_orphan(skb);
564 hidp_recv_ctrl_frame(session, skb);
565 }
566
567 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
568 skb_orphan(skb);
569 hidp_recv_intr_frame(session, skb);
570 }
571
572 hidp_process_transmit(session);
573
574 schedule();
575 }
576 set_current_state(TASK_RUNNING);
577 remove_wait_queue(intr_sk->sk_sleep, &intr_wait);
578 remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
579
580 down_write(&hidp_session_sem);
581
582 hidp_del_timer(session);
583
1da177e4
LT		 584 if (session->input) {
585 input_unregister_device(session->input);
34abf91f 586 session->input = NULL;
1da177e4
LT		 587 }
588
e1aaadd4
MH		 589 if (session->hid) {
590 if (session->hid->claimed & HID_CLAIMED_INPUT)
591 hidinput_disconnect(session->hid);
592 hid_free_device(session->hid);
593 }
594
1c39858b
DW		 595 fput(session->intr_sock->file);
596
597 wait_event_timeout(*(ctrl_sk->sk_sleep),
598 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
599
600 fput(session->ctrl_sock->file);
601
602 __hidp_unlink_session(session);
603
1da177e4
LT		 604 up_write(&hidp_session_sem);
605
606 kfree(session);
607 return 0;
608}
609
0a85b964
MH		 610static struct device *hidp_get_device(struct hidp_session *session)
611{
612 bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
613 bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
614 struct hci_dev *hdev;
615 struct hci_conn *conn;
616
617 hdev = hci_get_route(dst, src);
618 if (!hdev)
619 return NULL;
620
621 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
0a85b964
MH		 622
623 hci_dev_put(hdev);
624
b2cfcd75 625 return conn ? &conn->dev : NULL;
0a85b964
MH		 626}
627
1da177e4
LT		 628static inline void hidp_setup_input(struct hidp_session *session, struct hidp_connadd_req *req)
629{
630 struct input_dev *input = session->input;
631 int i;
632
5be39466 633 input_set_drvdata(input, session);
1da177e4 634
34abf91f
DT		 635 input->name = "Bluetooth HID Boot Protocol Device";
636
1da177e4
LT		 637 input->id.bustype = BUS_BLUETOOTH;
638 input->id.vendor = req->vendor;
639 input->id.product = req->product;
640 input->id.version = req->version;
641
642 if (req->subclass & 0x40) {
643 set_bit(EV_KEY, input->evbit);
644 set_bit(EV_LED, input->evbit);
645 set_bit(EV_REP, input->evbit);
646
647 set_bit(LED_NUML, input->ledbit);
648 set_bit(LED_CAPSL, input->ledbit);
649 set_bit(LED_SCROLLL, input->ledbit);
650 set_bit(LED_COMPOSE, input->ledbit);
651 set_bit(LED_KANA, input->ledbit);
652
653 for (i = 0; i < sizeof(hidp_keycode); i++)
654 set_bit(hidp_keycode[i], input->keybit);
655 clear_bit(0, input->keybit);
656 }
657
658 if (req->subclass & 0x80) {
659 input->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
660 input->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
661 input->relbit[0] = BIT(REL_X) | BIT(REL_Y);
662 input->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
663 input->relbit[0] |= BIT(REL_WHEEL);
664 }
665
5be39466 666 input->dev.parent = hidp_get_device(session);
0a85b964 667
1da177e4
LT		 668 input->event = hidp_input_event;
669
670 input_register_device(input);
671}
672
f5ffd462
MH		 673static int hidp_open(struct hid_device *hid)
674{
675 return 0;
676}
677
678static void hidp_close(struct hid_device *hid)
679{
680}
681
cb3fecc2
JK		 682static const struct {
683 __u16 idVendor;
684 __u16 idProduct;
685 unsigned quirks;
686} hidp_blacklist[] = {
687 /* Apple wireless Mighty Mouse */
688 { 0x05ac, 0x030c, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL },
689
690 { } /* Terminating entry */
691};
692
693static void hidp_setup_quirks(struct hid_device *hid)
694{
695 unsigned int n;
696
697 for (n = 0; hidp_blacklist[n].idVendor; n++)
698 if (hidp_blacklist[n].idVendor == le16_to_cpu(hid->vendor) &&
699 hidp_blacklist[n].idProduct == le16_to_cpu(hid->product))
700 hid->quirks = hidp_blacklist[n].quirks;
701}
702
e1aaadd4
MH		 703static inline void hidp_setup_hid(struct hidp_session *session, struct hidp_connadd_req *req)
704{
705 struct hid_device *hid = session->hid;
706 struct hid_report *report;
707 bdaddr_t src, dst;
708
709 baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
710 baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst);
711
712 hid->driver_data = session;
713
714 hid->country = req->country;
715
716 hid->bus = BUS_BLUETOOTH;
717 hid->vendor = req->vendor;
718 hid->product = req->product;
719 hid->version = req->version;
720
721 strncpy(hid->name, req->name, 128);
722 strncpy(hid->phys, batostr(&src), 64);
723 strncpy(hid->uniq, batostr(&dst), 64);
724
725 hid->dev = hidp_get_device(session);
726
f5ffd462
MH		 727 hid->hid_open = hidp_open;
728 hid->hid_close = hidp_close;
729
e1aaadd4
MH		 730 hid->hidinput_input_event = hidp_hidinput_event;
731
cb3fecc2
JK		 732 hidp_setup_quirks(hid);
733
e1aaadd4
MH		 734 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
735 hidp_send_report(session, report);
736
737 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
738 hidp_send_report(session, report);
739
3b180bff 740 if (hidinput_connect(hid) == 0)
e1aaadd4 741 hid->claimed |= HID_CLAIMED_INPUT;
e1aaadd4
MH		 742}
743
1da177e4
LT		 744int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
745{
746 struct hidp_session *session, *s;
747 int err;
748
749 BT_DBG("");
750
751 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
752 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
753 return -ENOTUNIQ;
754
25ea6db0 755 session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
34abf91f 756 if (!session)
1da177e4 757 return -ENOMEM;
1da177e4 758
e1aaadd4
MH		 759 BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
760
761 if (req->rd_size > 0) {
762 unsigned char *buf = kmalloc(req->rd_size, GFP_KERNEL);
763
764 if (!buf) {
765 kfree(session);
766 return -ENOMEM;
767 }
768
769 if (copy_from_user(buf, req->rd_data, req->rd_size)) {
770 kfree(buf);
771 kfree(session);
772 return -EFAULT;
773 }
774
775 session->hid = hid_parse_report(buf, req->rd_size);
776
777 kfree(buf);
778
779 if (!session->hid) {
780 kfree(session);
781 return -EINVAL;
782 }
783 }
784
785 if (!session->hid) {
786 session->input = input_allocate_device();
787 if (!session->input) {
788 kfree(session);
789 return -ENOMEM;
790 }
1da177e4 791 }
1da177e4
LT		 792
793 down_write(&hidp_session_sem);
794
795 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
796 if (s && s->state == BT_CONNECTED) {
797 err = -EEXIST;
798 goto failed;
799 }
800
801 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
802
803 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
804 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
805
806 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
807
808 session->ctrl_sock = ctrl_sock;
809 session->intr_sock = intr_sock;
810 session->state = BT_CONNECTED;
811
812 init_timer(&session->timer);
813
814 session->timer.function = hidp_idle_timeout;
815 session->timer.data = (unsigned long) session;
816
817 skb_queue_head_init(&session->ctrl_transmit);
818 skb_queue_head_init(&session->intr_transmit);
819
820 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
821 session->idle_to = req->idle_to;
822
823 if (session->input)
824 hidp_setup_input(session, req);
825
e1aaadd4
MH		 826 if (session->hid)
827 hidp_setup_hid(session, req);
828
1da177e4
LT		 829 __hidp_link_session(session);
830
831 hidp_set_timer(session);
832
833 err = kernel_thread(hidp_session, session, CLONE_KERNEL);
834 if (err < 0)
835 goto unlink;
836
837 if (session->input) {
838 hidp_send_ctrl_message(session,
839 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
840 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
841
842 session->leds = 0xff;
843 hidp_input_event(session->input, EV_LED, 0, 0);
844 }
845
846 up_write(&hidp_session_sem);
847 return 0;
848
849unlink:
850 hidp_del_timer(session);
851
852 __hidp_unlink_session(session);
853
34abf91f 854 if (session->input) {
1da177e4 855 input_unregister_device(session->input);
34abf91f
DT		 856 session->input = NULL; /* don't try to free it here */
857 }
1da177e4
LT		 858
859failed:
860 up_write(&hidp_session_sem);
861
e1aaadd4
MH		 862 if (session->hid)
863 hid_free_device(session->hid);
864
5be39466 865 input_free_device(session->input);
1da177e4
LT		 866 kfree(session);
867 return err;
868}
869
870int hidp_del_connection(struct hidp_conndel_req *req)
871{
872 struct hidp_session *session;
873 int err = 0;
874
875 BT_DBG("");
876
877 down_read(&hidp_session_sem);
878
879 session = __hidp_get_session(&req->bdaddr);
880 if (session) {
881 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
882 hidp_send_ctrl_message(session,
883 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
884 } else {
885 /* Flush the transmit queues */
886 skb_queue_purge(&session->ctrl_transmit);
887 skb_queue_purge(&session->intr_transmit);
888
889 /* Kill session thread */
890 atomic_inc(&session->terminate);
891 hidp_schedule(session);
892 }
893 } else
894 err = -ENOENT;
895
896 up_read(&hidp_session_sem);
897 return err;
898}
899
900int hidp_get_connlist(struct hidp_connlist_req *req)
901{
902 struct list_head *p;
903 int err = 0, n = 0;
904
905 BT_DBG("");
906
907 down_read(&hidp_session_sem);
908
909 list_for_each(p, &hidp_session_list) {
910 struct hidp_session *session;
911 struct hidp_conninfo ci;
912
913 session = list_entry(p, struct hidp_session, list);
914
915 __hidp_copy_session(session, &ci);
916
917 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
918 err = -EFAULT;
919 break;
920 }
921
922 if (++n >= req->cnum)
923 break;
924
925 req->ci++;
926 }
927 req->cnum = n;
928
929 up_read(&hidp_session_sem);
930 return err;
931}
932
933int hidp_get_conninfo(struct hidp_conninfo *ci)
934{
935 struct hidp_session *session;
936 int err = 0;
937
938 down_read(&hidp_session_sem);
939
940 session = __hidp_get_session(&ci->bdaddr);
941 if (session)
942 __hidp_copy_session(session, ci);
943 else
944 err = -ENOENT;
945
946 up_read(&hidp_session_sem);
947 return err;
948}
949
950static int __init hidp_init(void)
951{
952 l2cap_load();
953
954 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
955
956 return hidp_init_sockets();
957}
958
959static void __exit hidp_exit(void)
960{
961 hidp_cleanup_sockets();
962}
963
964module_init(hidp_init);
965module_exit(hidp_exit);
966
967MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
968MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
969MODULE_VERSION(VERSION);
970MODULE_LICENSE("GPL");
971MODULE_ALIAS("bt-proto-6");
kernel source for telekom puls (alcatel/mediatek)