1/* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org> 4 Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License version 2 as 8 published by the Free Software Foundation; 9 10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 11 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 13 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 14 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 15 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 21 SOFTWARE IS DISCLAIMED. 22*/ 23 24#include <linux/kref.h> 25#include <linux/module.h> 26#include <linux/file.h> 27#include <linux/kthread.h> 28#include <linux/hidraw.h> 29 30#include <net/bluetooth/bluetooth.h> 31#include <net/bluetooth/hci_core.h> 32#include <net/bluetooth/l2cap.h> 33 34#include "hidp.h" 35 36#define VERSION "1.2" 37 38static DECLARE_RWSEM(hidp_session_sem); 39static LIST_HEAD(hidp_session_list); 40 41static unsigned char hidp_keycode[256] = { 42 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 43 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 44 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 45 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52, 46 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88, 47 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69, 48 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73, 49 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190, 50 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, 51 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94, 52 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0, 53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58 29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, 59 114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140 60}; 61 62static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 63 64static int hidp_session_probe(struct l2cap_conn *conn, 65 struct l2cap_user *user); 66static void hidp_session_remove(struct l2cap_conn *conn, 67 struct l2cap_user *user); 68static int hidp_session_thread(void *arg); 69static void hidp_session_terminate(struct hidp_session *s); 70 71static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) 72{ 73 memset(ci, 0, sizeof(*ci)); 74 bacpy(&ci->bdaddr, &session->bdaddr); 75 76 ci->flags = session->flags; 77 ci->state = BT_CONNECTED; 78 79 if (session->input) { 80 ci->vendor = session->input->id.vendor; 81 ci->product = session->input->id.product; 82 ci->version = session->input->id.version; 83 if (session->input->name) 84 strlcpy(ci->name, session->input->name, 128); 85 else 86 strlcpy(ci->name, "HID Boot Device", 128); 87 } else if (session->hid) { 88 ci->vendor = session->hid->vendor; 89 ci->product = session->hid->product; 90 ci->version = session->hid->version; 91 strlcpy(ci->name, session->hid->name, 128); 92 } 93} 94 95/* assemble skb, queue message on @transmit and wake up the session thread */ 96static int hidp_send_message(struct hidp_session *session, struct socket *sock, 97 struct sk_buff_head *transmit, unsigned char hdr, 98 const unsigned char *data, int size) 99{ 100 struct sk_buff *skb; 101 struct sock *sk = sock->sk; 102 103 BT_DBG("session %p data %p size %d", session, data, size); 104 105 if (atomic_read(&session->terminate)) 106 return -EIO; 107 108 skb = alloc_skb(size + 1, GFP_ATOMIC); 109 if (!skb) { 110 BT_ERR("Can't allocate memory for new frame"); 111 return -ENOMEM; 112 } 113 114 *skb_put(skb, 1) = hdr; 115 if (data && size > 0) 116 memcpy(skb_put(skb, size), data, size); 117 118 skb_queue_tail(transmit, skb); 119 wake_up_interruptible(sk_sleep(sk)); 120 121 return 0; 122} 123 124static int hidp_send_ctrl_message(struct hidp_session *session, 125 unsigned char hdr, const unsigned char *data, 126 int size) 127{ 128 return hidp_send_message(session, session->ctrl_sock, 129 &session->ctrl_transmit, hdr, data, size); 130} 131 132static int hidp_send_intr_message(struct hidp_session *session, 133 unsigned char hdr, const unsigned char *data, 134 int size) 135{ 136 return hidp_send_message(session, session->intr_sock, 137 &session->intr_transmit, hdr, data, size); 138} 139 140static int hidp_input_event(struct input_dev *dev, unsigned int type, 141 unsigned int code, int value) 142{ 143 struct hidp_session *session = input_get_drvdata(dev); 144 unsigned char newleds; 145 unsigned char hdr, data[2]; 146 147 BT_DBG("session %p type %d code %d value %d", 148 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) << 0); 158 159 if (session->leds == newleds) 160 return 0; 161 162 session->leds = newleds; 163 164 hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 165 data[0] = 0x01; 166 data[1] = newleds; 167 168 return hidp_send_intr_message(session, hdr, data, 2); 169} 170 171static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) 172{ 173 struct input_dev *dev = session->input; 174 unsigned char *keys = session->keys; 175 unsigned char *udata = skb->data + 1; 176 signed char *sdata = skb->data + 1; 177 int i, size = skb->len - 1; 178 179 switch (skb->data[0]) { 180 case 0x01: /* Keyboard report */ 181 for (i = 0; i < 8; i++) 182 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); 183 184 /* If all the key codes have been set to 0x01, it means 185 * too many keys were pressed at the same time. */ 186 if (!memcmp(udata + 2, hidp_mkeyspat, 6)) 187 break; 188 189 for (i = 2; i < 8; i++) { 190 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { 191 if (hidp_keycode[keys[i]]) 192 input_report_key(dev, hidp_keycode[keys[i]], 0); 193 else 194 BT_ERR("Unknown key (scancode %#x) released.", keys[i]); 195 } 196 197 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { 198 if (hidp_keycode[udata[i]]) 199 input_report_key(dev, hidp_keycode[udata[i]], 1); 200 else 201 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); 202 } 203 } 204 205 memcpy(keys, udata, 8); 206 break; 207 208 case 0x02: /* Mouse report */ 209 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); 210 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); 211 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); 212 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); 213 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); 214 215 input_report_rel(dev, REL_X, sdata[1]); 216 input_report_rel(dev, REL_Y, sdata[2]); 217 218 if (size > 3) 219 input_report_rel(dev, REL_WHEEL, sdata[3]); 220 break; 221 } 222 223 input_sync(dev); 224} 225 226static int hidp_get_raw_report(struct hid_device *hid, 227 unsigned char report_number, 228 unsigned char *data, size_t count, 229 unsigned char report_type) 230{ 231 struct hidp_session *session = hid->driver_data; 232 struct sk_buff *skb; 233 size_t len; 234 int numbered_reports = hid->report_enum[report_type].numbered; 235 int ret; 236 237 if (atomic_read(&session->terminate)) 238 return -EIO; 239 240 switch (report_type) { 241 case HID_FEATURE_REPORT: 242 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE; 243 break; 244 case HID_INPUT_REPORT: 245 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT; 246 break; 247 case HID_OUTPUT_REPORT: 248 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT; 249 break; 250 default: 251 return -EINVAL; 252 } 253 254 if (mutex_lock_interruptible(&session->report_mutex)) 255 return -ERESTARTSYS; 256 257 /* Set up our wait, and send the report request to the device. */ 258 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK; 259 session->waiting_report_number = numbered_reports ? report_number : -1; 260 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 261 data[0] = report_number; 262 ret = hidp_send_ctrl_message(session, report_type, data, 1); 263 if (ret) 264 goto err; 265 266 /* Wait for the return of the report. The returned report 267 gets put in session->report_return. */ 268 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 269 !atomic_read(&session->terminate)) { 270 int res; 271 272 res = wait_event_interruptible_timeout(session->report_queue, 273 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) 274 || atomic_read(&session->terminate), 275 5*HZ); 276 if (res == 0) { 277 /* timeout */ 278 ret = -EIO; 279 goto err; 280 } 281 if (res < 0) { 282 /* signal */ 283 ret = -ERESTARTSYS; 284 goto err; 285 } 286 } 287 288 skb = session->report_return; 289 if (skb) { 290 len = skb->len < count ? skb->len : count; 291 memcpy(data, skb->data, len); 292 293 kfree_skb(skb); 294 session->report_return = NULL; 295 } else { 296 /* Device returned a HANDSHAKE, indicating protocol error. */ 297 len = -EIO; 298 } 299 300 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 301 mutex_unlock(&session->report_mutex); 302 303 return len; 304 305err: 306 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 307 mutex_unlock(&session->report_mutex); 308 return ret; 309} 310 311static int hidp_set_raw_report(struct hid_device *hid, unsigned char reportnum, 312 unsigned char *data, size_t count, 313 unsigned char report_type) 314{ 315 struct hidp_session *session = hid->driver_data; 316 int ret; 317 318 switch (report_type) { 319 case HID_FEATURE_REPORT: 320 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE; 321 break; 322 case HID_INPUT_REPORT: 323 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_INPUT; 324 break; 325 case HID_OUTPUT_REPORT: 326 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT; 327 break; 328 default: 329 return -EINVAL; 330 } 331 332 if (mutex_lock_interruptible(&session->report_mutex)) 333 return -ERESTARTSYS; 334 335 /* Set up our wait, and send the report request to the device. */ 336 data[0] = reportnum; 337 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 338 ret = hidp_send_ctrl_message(session, report_type, data, count); 339 if (ret) 340 goto err; 341 342 /* Wait for the ACK from the device. */ 343 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) && 344 !atomic_read(&session->terminate)) { 345 int res; 346 347 res = wait_event_interruptible_timeout(session->report_queue, 348 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) 349 || atomic_read(&session->terminate), 350 10*HZ); 351 if (res == 0) { 352 /* timeout */ 353 ret = -EIO; 354 goto err; 355 } 356 if (res < 0) { 357 /* signal */ 358 ret = -ERESTARTSYS; 359 goto err; 360 } 361 } 362 363 if (!session->output_report_success) { 364 ret = -EIO; 365 goto err; 366 } 367 368 ret = count; 369 370err: 371 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 372 mutex_unlock(&session->report_mutex); 373 return ret; 374} 375 376static int hidp_output_report(struct hid_device *hid, __u8 *data, size_t count) 377{ 378 struct hidp_session *session = hid->driver_data; 379 380 return hidp_send_intr_message(session, 381 HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT, 382 data, count); 383} 384 385static int hidp_raw_request(struct hid_device *hid, unsigned char reportnum, 386 __u8 *buf, size_t len, unsigned char rtype, 387 int reqtype) 388{ 389 switch (reqtype) { 390 case HID_REQ_GET_REPORT: 391 return hidp_get_raw_report(hid, reportnum, buf, len, rtype); 392 case HID_REQ_SET_REPORT: 393 return hidp_set_raw_report(hid, reportnum, buf, len, rtype); 394 default: 395 return -EIO; 396 } 397} 398 399static void hidp_idle_timeout(unsigned long arg) 400{ 401 struct hidp_session *session = (struct hidp_session *) arg; 402 403 hidp_session_terminate(session); 404} 405 406static void hidp_set_timer(struct hidp_session *session) 407{ 408 if (session->idle_to > 0) 409 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 410} 411 412static void hidp_del_timer(struct hidp_session *session) 413{ 414 if (session->idle_to > 0) 415 del_timer(&session->timer); 416} 417 418static void hidp_process_report(struct hidp_session *session, 419 int type, const u8 *data, int len, int intr) 420{ 421 if (len > HID_MAX_BUFFER_SIZE) 422 len = HID_MAX_BUFFER_SIZE; 423 424 memcpy(session->input_buf, data, len); 425 hid_input_report(session->hid, type, session->input_buf, len, intr); 426} 427 428static void hidp_process_handshake(struct hidp_session *session, 429 unsigned char param) 430{ 431 BT_DBG("session %p param 0x%02x", session, param); 432 session->output_report_success = 0; /* default condition */ 433 434 switch (param) { 435 case HIDP_HSHK_SUCCESSFUL: 436 /* FIXME: Call into SET_ GET_ handlers here */ 437 session->output_report_success = 1; 438 break; 439 440 case HIDP_HSHK_NOT_READY: 441 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 442 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 443 case HIDP_HSHK_ERR_INVALID_PARAMETER: 444 if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) 445 wake_up_interruptible(&session->report_queue); 446 447 /* FIXME: Call into SET_ GET_ handlers here */ 448 break; 449 450 case HIDP_HSHK_ERR_UNKNOWN: 451 break; 452 453 case HIDP_HSHK_ERR_FATAL: 454 /* Device requests a reboot, as this is the only way this error 455 * can be recovered. */ 456 hidp_send_ctrl_message(session, 457 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 458 break; 459 460 default: 461 hidp_send_ctrl_message(session, 462 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 463 break; 464 } 465 466 /* Wake up the waiting thread. */ 467 if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) 468 wake_up_interruptible(&session->report_queue); 469} 470 471static void hidp_process_hid_control(struct hidp_session *session, 472 unsigned char param) 473{ 474 BT_DBG("session %p param 0x%02x", session, param); 475 476 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { 477 /* Flush the transmit queues */ 478 skb_queue_purge(&session->ctrl_transmit); 479 skb_queue_purge(&session->intr_transmit); 480 481 hidp_session_terminate(session); 482 } 483} 484 485/* Returns true if the passed-in skb should be freed by the caller. */ 486static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb, 487 unsigned char param) 488{ 489 int done_with_skb = 1; 490 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 491 492 switch (param) { 493 case HIDP_DATA_RTYPE_INPUT: 494 hidp_set_timer(session); 495 496 if (session->input) 497 hidp_input_report(session, skb); 498 499 if (session->hid) 500 hidp_process_report(session, HID_INPUT_REPORT, 501 skb->data, skb->len, 0); 502 break; 503 504 case HIDP_DATA_RTYPE_OTHER: 505 case HIDP_DATA_RTYPE_OUPUT: 506 case HIDP_DATA_RTYPE_FEATURE: 507 break; 508 509 default: 510 hidp_send_ctrl_message(session, 511 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 512 } 513 514 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 515 param == session->waiting_report_type) { 516 if (session->waiting_report_number < 0 || 517 session->waiting_report_number == skb->data[0]) { 518 /* hidp_get_raw_report() is waiting on this report. */ 519 session->report_return = skb; 520 done_with_skb = 0; 521 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 522 wake_up_interruptible(&session->report_queue); 523 } 524 } 525 526 return done_with_skb; 527} 528 529static void hidp_recv_ctrl_frame(struct hidp_session *session, 530 struct sk_buff *skb) 531{ 532 unsigned char hdr, type, param; 533 int free_skb = 1; 534 535 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 536 537 hdr = skb->data[0]; 538 skb_pull(skb, 1); 539 540 type = hdr & HIDP_HEADER_TRANS_MASK; 541 param = hdr & HIDP_HEADER_PARAM_MASK; 542 543 switch (type) { 544 case HIDP_TRANS_HANDSHAKE: 545 hidp_process_handshake(session, param); 546 break; 547 548 case HIDP_TRANS_HID_CONTROL: 549 hidp_process_hid_control(session, param); 550 break; 551 552 case HIDP_TRANS_DATA: 553 free_skb = hidp_process_data(session, skb, param); 554 break; 555 556 default: 557 hidp_send_ctrl_message(session, 558 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 559 break; 560 } 561 562 if (free_skb) 563 kfree_skb(skb); 564} 565 566static void hidp_recv_intr_frame(struct hidp_session *session, 567 struct sk_buff *skb) 568{ 569 unsigned char hdr; 570 571 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 572 573 hdr = skb->data[0]; 574 skb_pull(skb, 1); 575 576 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 577 hidp_set_timer(session); 578 579 if (session->input) 580 hidp_input_report(session, skb); 581 582 if (session->hid) { 583 hidp_process_report(session, HID_INPUT_REPORT, 584 skb->data, skb->len, 1); 585 BT_DBG("report len %d", skb->len); 586 } 587 } else { 588 BT_DBG("Unsupported protocol header 0x%02x", hdr); 589 } 590 591 kfree_skb(skb); 592} 593 594static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 595{ 596 struct kvec iv = { data, len }; 597 struct msghdr msg; 598 599 BT_DBG("sock %p data %p len %d", sock, data, len); 600 601 if (!len) 602 return 0; 603 604 memset(&msg, 0, sizeof(msg)); 605 606 return kernel_sendmsg(sock, &msg, &iv, 1, len); 607} 608 609/* dequeue message from @transmit and send via @sock */ 610static void hidp_process_transmit(struct hidp_session *session, 611 struct sk_buff_head *transmit, 612 struct socket *sock) 613{ 614 struct sk_buff *skb; 615 int ret; 616 617 BT_DBG("session %p", session); 618 619 while ((skb = skb_dequeue(transmit))) { 620 ret = hidp_send_frame(sock, skb->data, skb->len); 621 if (ret == -EAGAIN) { 622 skb_queue_head(transmit, skb); 623 break; 624 } else if (ret < 0) { 625 hidp_session_terminate(session); 626 kfree_skb(skb); 627 break; 628 } 629 630 hidp_set_timer(session); 631 kfree_skb(skb); 632 } 633} 634 635static int hidp_setup_input(struct hidp_session *session, 636 struct hidp_connadd_req *req) 637{ 638 struct input_dev *input; 639 int i; 640 641 input = input_allocate_device(); 642 if (!input) 643 return -ENOMEM; 644 645 session->input = input; 646 647 input_set_drvdata(input, session); 648 649 input->name = "Bluetooth HID Boot Protocol Device"; 650 651 input->id.bustype = BUS_BLUETOOTH; 652 input->id.vendor = req->vendor; 653 input->id.product = req->product; 654 input->id.version = req->version; 655 656 if (req->subclass & 0x40) { 657 set_bit(EV_KEY, input->evbit); 658 set_bit(EV_LED, input->evbit); 659 set_bit(EV_REP, input->evbit); 660 661 set_bit(LED_NUML, input->ledbit); 662 set_bit(LED_CAPSL, input->ledbit); 663 set_bit(LED_SCROLLL, input->ledbit); 664 set_bit(LED_COMPOSE, input->ledbit); 665 set_bit(LED_KANA, input->ledbit); 666 667 for (i = 0; i < sizeof(hidp_keycode); i++) 668 set_bit(hidp_keycode[i], input->keybit); 669 clear_bit(0, input->keybit); 670 } 671 672 if (req->subclass & 0x80) { 673 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 674 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 675 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 676 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 677 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 678 BIT_MASK(BTN_EXTRA); 679 input->relbit[0] |= BIT_MASK(REL_WHEEL); 680 } 681 682 input->dev.parent = &session->conn->hcon->dev; 683 684 input->event = hidp_input_event; 685 686 return 0; 687} 688 689static int hidp_open(struct hid_device *hid) 690{ 691 return 0; 692} 693 694static void hidp_close(struct hid_device *hid) 695{ 696} 697 698static int hidp_parse(struct hid_device *hid) 699{ 700 struct hidp_session *session = hid->driver_data; 701 702 return hid_parse_report(session->hid, session->rd_data, 703 session->rd_size); 704} 705 706static int hidp_start(struct hid_device *hid) 707{ 708 return 0; 709} 710 711static void hidp_stop(struct hid_device *hid) 712{ 713 struct hidp_session *session = hid->driver_data; 714 715 skb_queue_purge(&session->ctrl_transmit); 716 skb_queue_purge(&session->intr_transmit); 717 718 hid->claimed = 0; 719} 720 721static struct hid_ll_driver hidp_hid_driver = { 722 .parse = hidp_parse, 723 .start = hidp_start, 724 .stop = hidp_stop, 725 .open = hidp_open, 726 .close = hidp_close, 727 .raw_request = hidp_raw_request, 728 .output_report = hidp_output_report, 729}; 730 731/* This function sets up the hid device. It does not add it 732 to the HID system. That is done in hidp_add_connection(). */ 733static int hidp_setup_hid(struct hidp_session *session, 734 struct hidp_connadd_req *req) 735{ 736 struct hid_device *hid; 737 int err; 738 739 session->rd_data = kzalloc(req->rd_size, GFP_KERNEL); 740 if (!session->rd_data) 741 return -ENOMEM; 742 743 if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) { 744 err = -EFAULT; 745 goto fault; 746 } 747 session->rd_size = req->rd_size; 748 749 hid = hid_allocate_device(); 750 if (IS_ERR(hid)) { 751 err = PTR_ERR(hid); 752 goto fault; 753 } 754 755 session->hid = hid; 756 757 hid->driver_data = session; 758 759 hid->bus = BUS_BLUETOOTH; 760 hid->vendor = req->vendor; 761 hid->product = req->product; 762 hid->version = req->version; 763 hid->country = req->country; 764 765 strncpy(hid->name, req->name, sizeof(req->name) - 1); 766 767 snprintf(hid->phys, sizeof(hid->phys), "%pMR", 768 &l2cap_pi(session->ctrl_sock->sk)->chan->src); 769 770 /* NOTE: Some device modules depend on the dst address being stored in 771 * uniq. Please be aware of this before making changes to this behavior. 772 */ 773 snprintf(hid->uniq, sizeof(hid->uniq), "%pMR", 774 &l2cap_pi(session->ctrl_sock->sk)->chan->dst); 775 776 hid->dev.parent = &session->conn->hcon->dev; 777 hid->ll_driver = &hidp_hid_driver; 778 779 /* True if device is blacklisted in drivers/hid/hid-core.c */ 780 if (hid_ignore(hid)) { 781 hid_destroy_device(session->hid); 782 session->hid = NULL; 783 return -ENODEV; 784 } 785 786 return 0; 787 788fault: 789 kfree(session->rd_data); 790 session->rd_data = NULL; 791 792 return err; 793} 794 795/* initialize session devices */ 796static int hidp_session_dev_init(struct hidp_session *session, 797 struct hidp_connadd_req *req) 798{ 799 int ret; 800 801 if (req->rd_size > 0) { 802 ret = hidp_setup_hid(session, req); 803 if (ret && ret != -ENODEV) 804 return ret; 805 } 806 807 if (!session->hid) { 808 ret = hidp_setup_input(session, req); 809 if (ret < 0) 810 return ret; 811 } 812 813 return 0; 814} 815 816/* destroy session devices */ 817static void hidp_session_dev_destroy(struct hidp_session *session) 818{ 819 if (session->hid) 820 put_device(&session->hid->dev); 821 else if (session->input) 822 input_put_device(session->input); 823 824 kfree(session->rd_data); 825 session->rd_data = NULL; 826} 827 828/* add HID/input devices to their underlying bus systems */ 829static int hidp_session_dev_add(struct hidp_session *session) 830{ 831 int ret; 832 833 /* Both HID and input systems drop a ref-count when unregistering the 834 * device but they don't take a ref-count when registering them. Work 835 * around this by explicitly taking a refcount during registration 836 * which is dropped automatically by unregistering the devices. */ 837 838 if (session->hid) { 839 ret = hid_add_device(session->hid); 840 if (ret) 841 return ret; 842 get_device(&session->hid->dev); 843 } else if (session->input) { 844 ret = input_register_device(session->input); 845 if (ret) 846 return ret; 847 input_get_device(session->input); 848 } 849 850 return 0; 851} 852 853/* remove HID/input devices from their bus systems */ 854static void hidp_session_dev_del(struct hidp_session *session) 855{ 856 if (session->hid) 857 hid_destroy_device(session->hid); 858 else if (session->input) 859 input_unregister_device(session->input); 860} 861 862/* 863 * Asynchronous device registration 864 * HID device drivers might want to perform I/O during initialization to 865 * detect device types. Therefore, call device registration in a separate 866 * worker so the HIDP thread can schedule I/O operations. 867 * Note that this must be called after the worker thread was initialized 868 * successfully. This will then add the devices and increase session state 869 * on success, otherwise it will terminate the session thread. 870 */ 871static void hidp_session_dev_work(struct work_struct *work) 872{ 873 struct hidp_session *session = container_of(work, 874 struct hidp_session, 875 dev_init); 876 int ret; 877 878 ret = hidp_session_dev_add(session); 879 if (!ret) 880 atomic_inc(&session->state); 881 else 882 hidp_session_terminate(session); 883} 884 885/* 886 * Create new session object 887 * Allocate session object, initialize static fields, copy input data into the 888 * object and take a reference to all sub-objects. 889 * This returns 0 on success and puts a pointer to the new session object in 890 * \out. Otherwise, an error code is returned. 891 * The new session object has an initial ref-count of 1. 892 */ 893static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, 894 struct socket *ctrl_sock, 895 struct socket *intr_sock, 896 struct hidp_connadd_req *req, 897 struct l2cap_conn *conn) 898{ 899 struct hidp_session *session; 900 int ret; 901 struct bt_sock *ctrl, *intr; 902 903 ctrl = bt_sk(ctrl_sock->sk); 904 intr = bt_sk(intr_sock->sk); 905 906 session = kzalloc(sizeof(*session), GFP_KERNEL); 907 if (!session) 908 return -ENOMEM; 909 910 /* object and runtime management */ 911 kref_init(&session->ref); 912 atomic_set(&session->state, HIDP_SESSION_IDLING); 913 init_waitqueue_head(&session->state_queue); 914 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); 915 916 /* connection management */ 917 bacpy(&session->bdaddr, bdaddr); 918 session->conn = l2cap_conn_get(conn); 919 session->user.probe = hidp_session_probe; 920 session->user.remove = hidp_session_remove; 921 session->ctrl_sock = ctrl_sock; 922 session->intr_sock = intr_sock; 923 skb_queue_head_init(&session->ctrl_transmit); 924 skb_queue_head_init(&session->intr_transmit); 925 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl)->chan->omtu, 926 l2cap_pi(ctrl)->chan->imtu); 927 session->intr_mtu = min_t(uint, l2cap_pi(intr)->chan->omtu, 928 l2cap_pi(intr)->chan->imtu); 929 session->idle_to = req->idle_to; 930 931 /* device management */ 932 INIT_WORK(&session->dev_init, hidp_session_dev_work); 933 setup_timer(&session->timer, hidp_idle_timeout, 934 (unsigned long)session); 935 936 /* session data */ 937 mutex_init(&session->report_mutex); 938 init_waitqueue_head(&session->report_queue); 939 940 ret = hidp_session_dev_init(session, req); 941 if (ret) 942 goto err_free; 943 944 get_file(session->intr_sock->file); 945 get_file(session->ctrl_sock->file); 946 *out = session; 947 return 0; 948 949err_free: 950 l2cap_conn_put(session->conn); 951 kfree(session); 952 return ret; 953} 954 955/* increase ref-count of the given session by one */ 956static void hidp_session_get(struct hidp_session *session) 957{ 958 kref_get(&session->ref); 959} 960 961/* release callback */ 962static void session_free(struct kref *ref) 963{ 964 struct hidp_session *session = container_of(ref, struct hidp_session, 965 ref); 966 967 hidp_session_dev_destroy(session); 968 skb_queue_purge(&session->ctrl_transmit); 969 skb_queue_purge(&session->intr_transmit); 970 fput(session->intr_sock->file); 971 fput(session->ctrl_sock->file); 972 l2cap_conn_put(session->conn); 973 kfree(session); 974} 975 976/* decrease ref-count of the given session by one */ 977static void hidp_session_put(struct hidp_session *session) 978{ 979 kref_put(&session->ref, session_free); 980} 981 982/* 983 * Search the list of active sessions for a session with target address 984 * \bdaddr. You must hold at least a read-lock on \hidp_session_sem. As long as 985 * you do not release this lock, the session objects cannot vanish and you can 986 * safely take a reference to the session yourself. 987 */ 988static struct hidp_session *__hidp_session_find(const bdaddr_t *bdaddr) 989{ 990 struct hidp_session *session; 991 992 list_for_each_entry(session, &hidp_session_list, list) { 993 if (!bacmp(bdaddr, &session->bdaddr)) 994 return session; 995 } 996 997 return NULL; 998} 999 1000/* 1001 * Same as __hidp_session_find() but no locks must be held. This also takes a 1002 * reference of the returned session (if non-NULL) so you must drop this 1003 * reference if you no longer use the object. 1004 */ 1005static struct hidp_session *hidp_session_find(const bdaddr_t *bdaddr) 1006{ 1007 struct hidp_session *session; 1008 1009 down_read(&hidp_session_sem); 1010 1011 session = __hidp_session_find(bdaddr); 1012 if (session) 1013 hidp_session_get(session); 1014 1015 up_read(&hidp_session_sem); 1016 1017 return session; 1018} 1019 1020/* 1021 * Start session synchronously 1022 * This starts a session thread and waits until initialization 1023 * is done or returns an error if it couldn't be started. 1024 * If this returns 0 the session thread is up and running. You must call 1025 * hipd_session_stop_sync() before deleting any runtime resources. 1026 */ 1027static int hidp_session_start_sync(struct hidp_session *session) 1028{ 1029 unsigned int vendor, product; 1030 1031 if (session->hid) { 1032 vendor = session->hid->vendor; 1033 product = session->hid->product; 1034 } else if (session->input) { 1035 vendor = session->input->id.vendor; 1036 product = session->input->id.product; 1037 } else { 1038 vendor = 0x0000; 1039 product = 0x0000; 1040 } 1041 1042 session->task = kthread_run(hidp_session_thread, session, 1043 "khidpd_%04x%04x", vendor, product); 1044 if (IS_ERR(session->task)) 1045 return PTR_ERR(session->task); 1046 1047 while (atomic_read(&session->state) <= HIDP_SESSION_IDLING) 1048 wait_event(session->state_queue, 1049 atomic_read(&session->state) > HIDP_SESSION_IDLING); 1050 1051 return 0; 1052} 1053 1054/* 1055 * Terminate session thread 1056 * Wake up session thread and notify it to stop. This is asynchronous and 1057 * returns immediately. Call this whenever a runtime error occurs and you want 1058 * the session to stop. 1059 * Note: wake_up_process() performs any necessary memory-barriers for us. 1060 */ 1061static void hidp_session_terminate(struct hidp_session *session) 1062{ 1063 atomic_inc(&session->terminate); 1064 wake_up_process(session->task); 1065} 1066 1067/* 1068 * Probe HIDP session 1069 * This is called from the l2cap_conn core when our l2cap_user object is bound 1070 * to the hci-connection. We get the session via the \user object and can now 1071 * start the session thread, link it into the global session list and 1072 * schedule HID/input device registration. 1073 * The global session-list owns its own reference to the session object so you 1074 * can drop your own reference after registering the l2cap_user object. 1075 */ 1076static int hidp_session_probe(struct l2cap_conn *conn, 1077 struct l2cap_user *user) 1078{ 1079 struct hidp_session *session = container_of(user, 1080 struct hidp_session, 1081 user); 1082 struct hidp_session *s; 1083 int ret; 1084 1085 down_write(&hidp_session_sem); 1086 1087 /* check that no other session for this device exists */ 1088 s = __hidp_session_find(&session->bdaddr); 1089 if (s) { 1090 ret = -EEXIST; 1091 goto out_unlock; 1092 } 1093 1094 if (session->input) { 1095 ret = hidp_session_dev_add(session); 1096 if (ret) 1097 goto out_unlock; 1098 } 1099 1100 ret = hidp_session_start_sync(session); 1101 if (ret) 1102 goto out_del; 1103 1104 /* HID device registration is async to allow I/O during probe */ 1105 if (session->input) 1106 atomic_inc(&session->state); 1107 else 1108 schedule_work(&session->dev_init); 1109 1110 hidp_session_get(session); 1111 list_add(&session->list, &hidp_session_list); 1112 ret = 0; 1113 goto out_unlock; 1114 1115out_del: 1116 if (session->input) 1117 hidp_session_dev_del(session); 1118out_unlock: 1119 up_write(&hidp_session_sem); 1120 return ret; 1121} 1122 1123/* 1124 * Remove HIDP session 1125 * Called from the l2cap_conn core when either we explicitly unregistered 1126 * the l2cap_user object or if the underlying connection is shut down. 1127 * We signal the hidp-session thread to shut down, unregister the HID/input 1128 * devices and unlink the session from the global list. 1129 * This drops the reference to the session that is owned by the global 1130 * session-list. 1131 * Note: We _must_ not synchronosly wait for the session-thread to shut down. 1132 * This is, because the session-thread might be waiting for an HCI lock that is 1133 * held while we are called. Therefore, we only unregister the devices and 1134 * notify the session-thread to terminate. The thread itself owns a reference 1135 * to the session object so it can safely shut down. 1136 */ 1137static void hidp_session_remove(struct l2cap_conn *conn, 1138 struct l2cap_user *user) 1139{ 1140 struct hidp_session *session = container_of(user, 1141 struct hidp_session, 1142 user); 1143 1144 down_write(&hidp_session_sem); 1145 1146 hidp_session_terminate(session); 1147 1148 cancel_work_sync(&session->dev_init); 1149 if (session->input || 1150 atomic_read(&session->state) > HIDP_SESSION_PREPARING) 1151 hidp_session_dev_del(session); 1152 1153 list_del(&session->list); 1154 1155 up_write(&hidp_session_sem); 1156 1157 hidp_session_put(session); 1158} 1159 1160/* 1161 * Session Worker 1162 * This performs the actual main-loop of the HIDP worker. We first check 1163 * whether the underlying connection is still alive, then parse all pending 1164 * messages and finally send all outstanding messages. 1165 */ 1166static void hidp_session_run(struct hidp_session *session) 1167{ 1168 struct sock *ctrl_sk = session->ctrl_sock->sk; 1169 struct sock *intr_sk = session->intr_sock->sk; 1170 struct sk_buff *skb; 1171 1172 for (;;) { 1173 /* 1174 * This thread can be woken up two ways: 1175 * - You call hidp_session_terminate() which sets the 1176 * session->terminate flag and wakes this thread up. 1177 * - Via modifying the socket state of ctrl/intr_sock. This 1178 * thread is woken up by ->sk_state_changed(). 1179 * 1180 * Note: set_current_state() performs any necessary 1181 * memory-barriers for us. 1182 */ 1183 set_current_state(TASK_INTERRUPTIBLE); 1184 1185 if (atomic_read(&session->terminate)) 1186 break; 1187 1188 if (ctrl_sk->sk_state != BT_CONNECTED || 1189 intr_sk->sk_state != BT_CONNECTED) 1190 break; 1191 1192 /* parse incoming intr-skbs */ 1193 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 1194 skb_orphan(skb); 1195 if (!skb_linearize(skb)) 1196 hidp_recv_intr_frame(session, skb); 1197 else 1198 kfree_skb(skb); 1199 } 1200 1201 /* send pending intr-skbs */ 1202 hidp_process_transmit(session, &session->intr_transmit, 1203 session->intr_sock); 1204 1205 /* parse incoming ctrl-skbs */ 1206 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 1207 skb_orphan(skb); 1208 if (!skb_linearize(skb)) 1209 hidp_recv_ctrl_frame(session, skb); 1210 else 1211 kfree_skb(skb); 1212 } 1213 1214 /* send pending ctrl-skbs */ 1215 hidp_process_transmit(session, &session->ctrl_transmit, 1216 session->ctrl_sock); 1217 1218 schedule(); 1219 } 1220 1221 atomic_inc(&session->terminate); 1222 set_current_state(TASK_RUNNING); 1223} 1224 1225/* 1226 * HIDP session thread 1227 * This thread runs the I/O for a single HIDP session. Startup is synchronous 1228 * which allows us to take references to ourself here instead of doing that in 1229 * the caller. 1230 * When we are ready to run we notify the caller and call hidp_session_run(). 1231 */ 1232static int hidp_session_thread(void *arg) 1233{ 1234 struct hidp_session *session = arg; 1235 wait_queue_t ctrl_wait, intr_wait; 1236 1237 BT_DBG("session %p", session); 1238 1239 /* initialize runtime environment */ 1240 hidp_session_get(session); 1241 __module_get(THIS_MODULE); 1242 set_user_nice(current, -15); 1243 hidp_set_timer(session); 1244 1245 init_waitqueue_entry(&ctrl_wait, current); 1246 init_waitqueue_entry(&intr_wait, current); 1247 add_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait); 1248 add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1249 /* This memory barrier is paired with wq_has_sleeper(). See 1250 * sock_poll_wait() for more information why this is needed. */ 1251 smp_mb(); 1252 1253 /* notify synchronous startup that we're ready */ 1254 atomic_inc(&session->state); 1255 wake_up(&session->state_queue); 1256 1257 /* run session */ 1258 hidp_session_run(session); 1259 1260 /* cleanup runtime environment */ 1261 remove_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1262 remove_wait_queue(sk_sleep(session->intr_sock->sk), &ctrl_wait); 1263 wake_up_interruptible(&session->report_queue); 1264 hidp_del_timer(session); 1265 1266 /* 1267 * If we stopped ourself due to any internal signal, we should try to 1268 * unregister our own session here to avoid having it linger until the 1269 * parent l2cap_conn dies or user-space cleans it up. 1270 * This does not deadlock as we don't do any synchronous shutdown. 1271 * Instead, this call has the same semantics as if user-space tried to 1272 * delete the session. 1273 */ 1274 l2cap_unregister_user(session->conn, &session->user); 1275 hidp_session_put(session); 1276 1277 module_put_and_exit(0); 1278 return 0; 1279} 1280 1281static int hidp_verify_sockets(struct socket *ctrl_sock, 1282 struct socket *intr_sock) 1283{ 1284 struct l2cap_chan *ctrl_chan, *intr_chan; 1285 struct bt_sock *ctrl, *intr; 1286 struct hidp_session *session; 1287 1288 if (!l2cap_is_socket(ctrl_sock) || !l2cap_is_socket(intr_sock)) 1289 return -EINVAL; 1290 1291 ctrl_chan = l2cap_pi(ctrl_sock->sk)->chan; 1292 intr_chan = l2cap_pi(intr_sock->sk)->chan; 1293 1294 if (bacmp(&ctrl_chan->src, &intr_chan->src) || 1295 bacmp(&ctrl_chan->dst, &intr_chan->dst)) 1296 return -ENOTUNIQ; 1297 1298 ctrl = bt_sk(ctrl_sock->sk); 1299 intr = bt_sk(intr_sock->sk); 1300 1301 if (ctrl->sk.sk_state != BT_CONNECTED || 1302 intr->sk.sk_state != BT_CONNECTED) 1303 return -EBADFD; 1304 1305 /* early session check, we check again during session registration */ 1306 session = hidp_session_find(&ctrl_chan->dst); 1307 if (session) { 1308 hidp_session_put(session); 1309 return -EEXIST; 1310 } 1311 1312 return 0; 1313} 1314 1315int hidp_connection_add(struct hidp_connadd_req *req, 1316 struct socket *ctrl_sock, 1317 struct socket *intr_sock) 1318{ 1319 struct hidp_session *session; 1320 struct l2cap_conn *conn; 1321 struct l2cap_chan *chan = l2cap_pi(ctrl_sock->sk)->chan; 1322 int ret; 1323 1324 ret = hidp_verify_sockets(ctrl_sock, intr_sock); 1325 if (ret) 1326 return ret; 1327 1328 conn = NULL; 1329 l2cap_chan_lock(chan); 1330 if (chan->conn) 1331 conn = l2cap_conn_get(chan->conn); 1332 l2cap_chan_unlock(chan); 1333 1334 if (!conn) 1335 return -EBADFD; 1336 1337 ret = hidp_session_new(&session, &chan->dst, ctrl_sock, 1338 intr_sock, req, conn); 1339 if (ret) 1340 goto out_conn; 1341 1342 ret = l2cap_register_user(conn, &session->user); 1343 if (ret) 1344 goto out_session; 1345 1346 ret = 0; 1347 1348out_session: 1349 hidp_session_put(session); 1350out_conn: 1351 l2cap_conn_put(conn); 1352 return ret; 1353} 1354 1355int hidp_connection_del(struct hidp_conndel_req *req) 1356{ 1357 struct hidp_session *session; 1358 1359 session = hidp_session_find(&req->bdaddr); 1360 if (!session) 1361 return -ENOENT; 1362 1363 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) 1364 hidp_send_ctrl_message(session, 1365 HIDP_TRANS_HID_CONTROL | 1366 HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, 1367 NULL, 0); 1368 else 1369 l2cap_unregister_user(session->conn, &session->user); 1370 1371 hidp_session_put(session); 1372 1373 return 0; 1374} 1375 1376int hidp_get_connlist(struct hidp_connlist_req *req) 1377{ 1378 struct hidp_session *session; 1379 int err = 0, n = 0; 1380 1381 BT_DBG(""); 1382 1383 down_read(&hidp_session_sem); 1384 1385 list_for_each_entry(session, &hidp_session_list, list) { 1386 struct hidp_conninfo ci; 1387 1388 hidp_copy_session(session, &ci); 1389 1390 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 1391 err = -EFAULT; 1392 break; 1393 } 1394 1395 if (++n >= req->cnum) 1396 break; 1397 1398 req->ci++; 1399 } 1400 req->cnum = n; 1401 1402 up_read(&hidp_session_sem); 1403 return err; 1404} 1405 1406int hidp_get_conninfo(struct hidp_conninfo *ci) 1407{ 1408 struct hidp_session *session; 1409 1410 session = hidp_session_find(&ci->bdaddr); 1411 if (session) { 1412 hidp_copy_session(session, ci); 1413 hidp_session_put(session); 1414 } 1415 1416 return session ? 0 : -ENOENT; 1417} 1418 1419static int __init hidp_init(void) 1420{ 1421 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 1422 1423 return hidp_init_sockets(); 1424} 1425 1426static void __exit hidp_exit(void) 1427{ 1428 hidp_cleanup_sockets(); 1429} 1430 1431module_init(hidp_init); 1432module_exit(hidp_exit); 1433 1434MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 1435MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>"); 1436MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 1437MODULE_VERSION(VERSION); 1438MODULE_LICENSE("GPL"); 1439MODULE_ALIAS("bt-proto-6"); 1440