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 38 static DECLARE_RWSEM(hidp_session_sem); 39 static LIST_HEAD(hidp_session_list); 40 41 static 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 62 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 63 64 static int hidp_session_probe(struct l2cap_conn *conn, 65 struct l2cap_user *user); 66 static void hidp_session_remove(struct l2cap_conn *conn, 67 struct l2cap_user *user); 68 static int hidp_session_thread(void *arg); 69 static void hidp_session_terminate(struct hidp_session *s); 70 71 static 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 */ 96 static 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 } 123 124 static 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 } 131 132 static 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 } 139 140 static 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)); 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 } 170 171 static 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 } 225 226 static int hidp_send_report(struct hidp_session *session, struct hid_report *report) 227 { 228 unsigned char hdr; 229 u8 *buf; 230 int rsize, ret; 231 232 buf = hid_alloc_report_buf(report, GFP_ATOMIC); 233 if (!buf) 234 return -EIO; 235 236 hid_output_report(report, buf); 237 hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 238 239 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0); 240 ret = hidp_send_intr_message(session, hdr, buf, rsize); 241 242 kfree(buf); 243 return ret; 244 } 245 246 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, 247 unsigned int code, int value) 248 { 249 struct hid_device *hid = input_get_drvdata(dev); 250 struct hidp_session *session = hid->driver_data; 251 struct hid_field *field; 252 int offset; 253 254 BT_DBG("session %p type %d code %d value %d", 255 session, type, code, value); 256 257 if (type != EV_LED) 258 return -1; 259 260 offset = hidinput_find_field(hid, type, code, &field); 261 if (offset == -1) { 262 hid_warn(dev, "event field not found\n"); 263 return -1; 264 } 265 266 hid_set_field(field, offset, value); 267 268 return hidp_send_report(session, field->report); 269 } 270 271 static int hidp_get_raw_report(struct hid_device *hid, 272 unsigned char report_number, 273 unsigned char *data, size_t count, 274 unsigned char report_type) 275 { 276 struct hidp_session *session = hid->driver_data; 277 struct sk_buff *skb; 278 size_t len; 279 int numbered_reports = hid->report_enum[report_type].numbered; 280 int ret; 281 282 if (atomic_read(&session->terminate)) 283 return -EIO; 284 285 switch (report_type) { 286 case HID_FEATURE_REPORT: 287 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE; 288 break; 289 case HID_INPUT_REPORT: 290 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT; 291 break; 292 case HID_OUTPUT_REPORT: 293 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT; 294 break; 295 default: 296 return -EINVAL; 297 } 298 299 if (mutex_lock_interruptible(&session->report_mutex)) 300 return -ERESTARTSYS; 301 302 /* Set up our wait, and send the report request to the device. */ 303 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK; 304 session->waiting_report_number = numbered_reports ? report_number : -1; 305 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 306 data[0] = report_number; 307 ret = hidp_send_ctrl_message(session, report_type, data, 1); 308 if (ret) 309 goto err; 310 311 /* Wait for the return of the report. The returned report 312 gets put in session->report_return. */ 313 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 314 !atomic_read(&session->terminate)) { 315 int res; 316 317 res = wait_event_interruptible_timeout(session->report_queue, 318 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) 319 || atomic_read(&session->terminate), 320 5*HZ); 321 if (res == 0) { 322 /* timeout */ 323 ret = -EIO; 324 goto err; 325 } 326 if (res < 0) { 327 /* signal */ 328 ret = -ERESTARTSYS; 329 goto err; 330 } 331 } 332 333 skb = session->report_return; 334 if (skb) { 335 len = skb->len < count ? skb->len : count; 336 memcpy(data, skb->data, len); 337 338 kfree_skb(skb); 339 session->report_return = NULL; 340 } else { 341 /* Device returned a HANDSHAKE, indicating protocol error. */ 342 len = -EIO; 343 } 344 345 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 346 mutex_unlock(&session->report_mutex); 347 348 return len; 349 350 err: 351 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 352 mutex_unlock(&session->report_mutex); 353 return ret; 354 } 355 356 static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count, 357 unsigned char report_type) 358 { 359 struct hidp_session *session = hid->driver_data; 360 int ret; 361 362 if (report_type == HID_OUTPUT_REPORT) { 363 report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 364 return hidp_send_intr_message(session, report_type, 365 data, count); 366 } else if (report_type != HID_FEATURE_REPORT) { 367 return -EINVAL; 368 } 369 370 if (mutex_lock_interruptible(&session->report_mutex)) 371 return -ERESTARTSYS; 372 373 /* Set up our wait, and send the report request to the device. */ 374 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 375 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE; 376 ret = hidp_send_ctrl_message(session, report_type, data, count); 377 if (ret) 378 goto err; 379 380 /* Wait for the ACK from the device. */ 381 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) && 382 !atomic_read(&session->terminate)) { 383 int res; 384 385 res = wait_event_interruptible_timeout(session->report_queue, 386 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) 387 || atomic_read(&session->terminate), 388 10*HZ); 389 if (res == 0) { 390 /* timeout */ 391 ret = -EIO; 392 goto err; 393 } 394 if (res < 0) { 395 /* signal */ 396 ret = -ERESTARTSYS; 397 goto err; 398 } 399 } 400 401 if (!session->output_report_success) { 402 ret = -EIO; 403 goto err; 404 } 405 406 ret = count; 407 408 err: 409 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 410 mutex_unlock(&session->report_mutex); 411 return ret; 412 } 413 414 static void hidp_idle_timeout(unsigned long arg) 415 { 416 struct hidp_session *session = (struct hidp_session *) arg; 417 418 hidp_session_terminate(session); 419 } 420 421 static void hidp_set_timer(struct hidp_session *session) 422 { 423 if (session->idle_to > 0) 424 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 425 } 426 427 static void hidp_del_timer(struct hidp_session *session) 428 { 429 if (session->idle_to > 0) 430 del_timer(&session->timer); 431 } 432 433 static void hidp_process_handshake(struct hidp_session *session, 434 unsigned char param) 435 { 436 BT_DBG("session %p param 0x%02x", session, param); 437 session->output_report_success = 0; /* default condition */ 438 439 switch (param) { 440 case HIDP_HSHK_SUCCESSFUL: 441 /* FIXME: Call into SET_ GET_ handlers here */ 442 session->output_report_success = 1; 443 break; 444 445 case HIDP_HSHK_NOT_READY: 446 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 447 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 448 case HIDP_HSHK_ERR_INVALID_PARAMETER: 449 if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) 450 wake_up_interruptible(&session->report_queue); 451 452 /* FIXME: Call into SET_ GET_ handlers here */ 453 break; 454 455 case HIDP_HSHK_ERR_UNKNOWN: 456 break; 457 458 case HIDP_HSHK_ERR_FATAL: 459 /* Device requests a reboot, as this is the only way this error 460 * can be recovered. */ 461 hidp_send_ctrl_message(session, 462 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 463 break; 464 465 default: 466 hidp_send_ctrl_message(session, 467 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 468 break; 469 } 470 471 /* Wake up the waiting thread. */ 472 if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) 473 wake_up_interruptible(&session->report_queue); 474 } 475 476 static void hidp_process_hid_control(struct hidp_session *session, 477 unsigned char param) 478 { 479 BT_DBG("session %p param 0x%02x", session, param); 480 481 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { 482 /* Flush the transmit queues */ 483 skb_queue_purge(&session->ctrl_transmit); 484 skb_queue_purge(&session->intr_transmit); 485 486 hidp_session_terminate(session); 487 } 488 } 489 490 /* Returns true if the passed-in skb should be freed by the caller. */ 491 static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb, 492 unsigned char param) 493 { 494 int done_with_skb = 1; 495 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 496 497 switch (param) { 498 case HIDP_DATA_RTYPE_INPUT: 499 hidp_set_timer(session); 500 501 if (session->input) 502 hidp_input_report(session, skb); 503 504 if (session->hid) 505 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0); 506 break; 507 508 case HIDP_DATA_RTYPE_OTHER: 509 case HIDP_DATA_RTYPE_OUPUT: 510 case HIDP_DATA_RTYPE_FEATURE: 511 break; 512 513 default: 514 hidp_send_ctrl_message(session, 515 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 516 } 517 518 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 519 param == session->waiting_report_type) { 520 if (session->waiting_report_number < 0 || 521 session->waiting_report_number == skb->data[0]) { 522 /* hidp_get_raw_report() is waiting on this report. */ 523 session->report_return = skb; 524 done_with_skb = 0; 525 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 526 wake_up_interruptible(&session->report_queue); 527 } 528 } 529 530 return done_with_skb; 531 } 532 533 static void hidp_recv_ctrl_frame(struct hidp_session *session, 534 struct sk_buff *skb) 535 { 536 unsigned char hdr, type, param; 537 int free_skb = 1; 538 539 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 540 541 hdr = skb->data[0]; 542 skb_pull(skb, 1); 543 544 type = hdr & HIDP_HEADER_TRANS_MASK; 545 param = hdr & HIDP_HEADER_PARAM_MASK; 546 547 switch (type) { 548 case HIDP_TRANS_HANDSHAKE: 549 hidp_process_handshake(session, param); 550 break; 551 552 case HIDP_TRANS_HID_CONTROL: 553 hidp_process_hid_control(session, param); 554 break; 555 556 case HIDP_TRANS_DATA: 557 free_skb = hidp_process_data(session, skb, param); 558 break; 559 560 default: 561 hidp_send_ctrl_message(session, 562 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 563 break; 564 } 565 566 if (free_skb) 567 kfree_skb(skb); 568 } 569 570 static void hidp_recv_intr_frame(struct hidp_session *session, 571 struct sk_buff *skb) 572 { 573 unsigned char hdr; 574 575 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 576 577 hdr = skb->data[0]; 578 skb_pull(skb, 1); 579 580 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 581 hidp_set_timer(session); 582 583 if (session->input) 584 hidp_input_report(session, skb); 585 586 if (session->hid) { 587 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1); 588 BT_DBG("report len %d", skb->len); 589 } 590 } else { 591 BT_DBG("Unsupported protocol header 0x%02x", hdr); 592 } 593 594 kfree_skb(skb); 595 } 596 597 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 598 { 599 struct kvec iv = { data, len }; 600 struct msghdr msg; 601 602 BT_DBG("sock %p data %p len %d", sock, data, len); 603 604 if (!len) 605 return 0; 606 607 memset(&msg, 0, sizeof(msg)); 608 609 return kernel_sendmsg(sock, &msg, &iv, 1, len); 610 } 611 612 /* dequeue message from @transmit and send via @sock */ 613 static void hidp_process_transmit(struct hidp_session *session, 614 struct sk_buff_head *transmit, 615 struct socket *sock) 616 { 617 struct sk_buff *skb; 618 int ret; 619 620 BT_DBG("session %p", session); 621 622 while ((skb = skb_dequeue(transmit))) { 623 ret = hidp_send_frame(sock, skb->data, skb->len); 624 if (ret == -EAGAIN) { 625 skb_queue_head(transmit, skb); 626 break; 627 } else if (ret < 0) { 628 hidp_session_terminate(session); 629 kfree_skb(skb); 630 break; 631 } 632 633 hidp_set_timer(session); 634 kfree_skb(skb); 635 } 636 } 637 638 static int hidp_setup_input(struct hidp_session *session, 639 struct hidp_connadd_req *req) 640 { 641 struct input_dev *input; 642 int i; 643 644 input = input_allocate_device(); 645 if (!input) 646 return -ENOMEM; 647 648 session->input = input; 649 650 input_set_drvdata(input, session); 651 652 input->name = "Bluetooth HID Boot Protocol Device"; 653 654 input->id.bustype = BUS_BLUETOOTH; 655 input->id.vendor = req->vendor; 656 input->id.product = req->product; 657 input->id.version = req->version; 658 659 if (req->subclass & 0x40) { 660 set_bit(EV_KEY, input->evbit); 661 set_bit(EV_LED, input->evbit); 662 set_bit(EV_REP, input->evbit); 663 664 set_bit(LED_NUML, input->ledbit); 665 set_bit(LED_CAPSL, input->ledbit); 666 set_bit(LED_SCROLLL, input->ledbit); 667 set_bit(LED_COMPOSE, input->ledbit); 668 set_bit(LED_KANA, input->ledbit); 669 670 for (i = 0; i < sizeof(hidp_keycode); i++) 671 set_bit(hidp_keycode[i], input->keybit); 672 clear_bit(0, input->keybit); 673 } 674 675 if (req->subclass & 0x80) { 676 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 677 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 678 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 679 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 680 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 681 BIT_MASK(BTN_EXTRA); 682 input->relbit[0] |= BIT_MASK(REL_WHEEL); 683 } 684 685 input->dev.parent = &session->conn->hcon->dev; 686 687 input->event = hidp_input_event; 688 689 return 0; 690 } 691 692 static int hidp_open(struct hid_device *hid) 693 { 694 return 0; 695 } 696 697 static void hidp_close(struct hid_device *hid) 698 { 699 } 700 701 static int hidp_parse(struct hid_device *hid) 702 { 703 struct hidp_session *session = hid->driver_data; 704 705 return hid_parse_report(session->hid, session->rd_data, 706 session->rd_size); 707 } 708 709 static int hidp_start(struct hid_device *hid) 710 { 711 return 0; 712 } 713 714 static void hidp_stop(struct hid_device *hid) 715 { 716 struct hidp_session *session = hid->driver_data; 717 718 skb_queue_purge(&session->ctrl_transmit); 719 skb_queue_purge(&session->intr_transmit); 720 721 hid->claimed = 0; 722 } 723 724 static struct hid_ll_driver hidp_hid_driver = { 725 .parse = hidp_parse, 726 .start = hidp_start, 727 .stop = hidp_stop, 728 .open = hidp_open, 729 .close = hidp_close, 730 .hidinput_input_event = hidp_hidinput_event, 731 }; 732 733 /* This function sets up the hid device. It does not add it 734 to the HID system. That is done in hidp_add_connection(). */ 735 static int hidp_setup_hid(struct hidp_session *session, 736 struct hidp_connadd_req *req) 737 { 738 struct hid_device *hid; 739 int err; 740 741 session->rd_data = kzalloc(req->rd_size, GFP_KERNEL); 742 if (!session->rd_data) 743 return -ENOMEM; 744 745 if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) { 746 err = -EFAULT; 747 goto fault; 748 } 749 session->rd_size = req->rd_size; 750 751 hid = hid_allocate_device(); 752 if (IS_ERR(hid)) { 753 err = PTR_ERR(hid); 754 goto fault; 755 } 756 757 session->hid = hid; 758 759 hid->driver_data = session; 760 761 hid->bus = BUS_BLUETOOTH; 762 hid->vendor = req->vendor; 763 hid->product = req->product; 764 hid->version = req->version; 765 hid->country = req->country; 766 767 strncpy(hid->name, req->name, sizeof(req->name) - 1); 768 769 snprintf(hid->phys, sizeof(hid->phys), "%pMR", 770 &l2cap_pi(session->ctrl_sock->sk)->chan->src); 771 772 snprintf(hid->uniq, sizeof(hid->uniq), "%pMR", 773 &l2cap_pi(session->ctrl_sock->sk)->chan->dst); 774 775 hid->dev.parent = &session->conn->hcon->dev; 776 hid->ll_driver = &hidp_hid_driver; 777 778 hid->hid_get_raw_report = hidp_get_raw_report; 779 hid->hid_output_raw_report = hidp_output_raw_report; 780 781 /* True if device is blacklisted in drivers/hid/hid-core.c */ 782 if (hid_ignore(hid)) { 783 hid_destroy_device(session->hid); 784 session->hid = NULL; 785 return -ENODEV; 786 } 787 788 return 0; 789 790 fault: 791 kfree(session->rd_data); 792 session->rd_data = NULL; 793 794 return err; 795 } 796 797 /* initialize session devices */ 798 static int hidp_session_dev_init(struct hidp_session *session, 799 struct hidp_connadd_req *req) 800 { 801 int ret; 802 803 if (req->rd_size > 0) { 804 ret = hidp_setup_hid(session, req); 805 if (ret && ret != -ENODEV) 806 return ret; 807 } 808 809 if (!session->hid) { 810 ret = hidp_setup_input(session, req); 811 if (ret < 0) 812 return ret; 813 } 814 815 return 0; 816 } 817 818 /* destroy session devices */ 819 static void hidp_session_dev_destroy(struct hidp_session *session) 820 { 821 if (session->hid) 822 put_device(&session->hid->dev); 823 else if (session->input) 824 input_put_device(session->input); 825 826 kfree(session->rd_data); 827 session->rd_data = NULL; 828 } 829 830 /* add HID/input devices to their underlying bus systems */ 831 static int hidp_session_dev_add(struct hidp_session *session) 832 { 833 int ret; 834 835 /* Both HID and input systems drop a ref-count when unregistering the 836 * device but they don't take a ref-count when registering them. Work 837 * around this by explicitly taking a refcount during registration 838 * which is dropped automatically by unregistering the devices. */ 839 840 if (session->hid) { 841 ret = hid_add_device(session->hid); 842 if (ret) 843 return ret; 844 get_device(&session->hid->dev); 845 } else if (session->input) { 846 ret = input_register_device(session->input); 847 if (ret) 848 return ret; 849 input_get_device(session->input); 850 } 851 852 return 0; 853 } 854 855 /* remove HID/input devices from their bus systems */ 856 static void hidp_session_dev_del(struct hidp_session *session) 857 { 858 if (session->hid) 859 hid_destroy_device(session->hid); 860 else if (session->input) 861 input_unregister_device(session->input); 862 } 863 864 /* 865 * Asynchronous device registration 866 * HID device drivers might want to perform I/O during initialization to 867 * detect device types. Therefore, call device registration in a separate 868 * worker so the HIDP thread can schedule I/O operations. 869 * Note that this must be called after the worker thread was initialized 870 * successfully. This will then add the devices and increase session state 871 * on success, otherwise it will terminate the session thread. 872 */ 873 static void hidp_session_dev_work(struct work_struct *work) 874 { 875 struct hidp_session *session = container_of(work, 876 struct hidp_session, 877 dev_init); 878 int ret; 879 880 ret = hidp_session_dev_add(session); 881 if (!ret) 882 atomic_inc(&session->state); 883 else 884 hidp_session_terminate(session); 885 } 886 887 /* 888 * Create new session object 889 * Allocate session object, initialize static fields, copy input data into the 890 * object and take a reference to all sub-objects. 891 * This returns 0 on success and puts a pointer to the new session object in 892 * \out. Otherwise, an error code is returned. 893 * The new session object has an initial ref-count of 1. 894 */ 895 static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, 896 struct socket *ctrl_sock, 897 struct socket *intr_sock, 898 struct hidp_connadd_req *req, 899 struct l2cap_conn *conn) 900 { 901 struct hidp_session *session; 902 int ret; 903 struct bt_sock *ctrl, *intr; 904 905 ctrl = bt_sk(ctrl_sock->sk); 906 intr = bt_sk(intr_sock->sk); 907 908 session = kzalloc(sizeof(*session), GFP_KERNEL); 909 if (!session) 910 return -ENOMEM; 911 912 /* object and runtime management */ 913 kref_init(&session->ref); 914 atomic_set(&session->state, HIDP_SESSION_IDLING); 915 init_waitqueue_head(&session->state_queue); 916 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); 917 918 /* connection management */ 919 bacpy(&session->bdaddr, bdaddr); 920 session->conn = conn; 921 session->user.probe = hidp_session_probe; 922 session->user.remove = hidp_session_remove; 923 session->ctrl_sock = ctrl_sock; 924 session->intr_sock = intr_sock; 925 skb_queue_head_init(&session->ctrl_transmit); 926 skb_queue_head_init(&session->intr_transmit); 927 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl)->chan->omtu, 928 l2cap_pi(ctrl)->chan->imtu); 929 session->intr_mtu = min_t(uint, l2cap_pi(intr)->chan->omtu, 930 l2cap_pi(intr)->chan->imtu); 931 session->idle_to = req->idle_to; 932 933 /* device management */ 934 INIT_WORK(&session->dev_init, hidp_session_dev_work); 935 setup_timer(&session->timer, hidp_idle_timeout, 936 (unsigned long)session); 937 938 /* session data */ 939 mutex_init(&session->report_mutex); 940 init_waitqueue_head(&session->report_queue); 941 942 ret = hidp_session_dev_init(session, req); 943 if (ret) 944 goto err_free; 945 946 l2cap_conn_get(session->conn); 947 get_file(session->intr_sock->file); 948 get_file(session->ctrl_sock->file); 949 *out = session; 950 return 0; 951 952 err_free: 953 kfree(session); 954 return ret; 955 } 956 957 /* increase ref-count of the given session by one */ 958 static void hidp_session_get(struct hidp_session *session) 959 { 960 kref_get(&session->ref); 961 } 962 963 /* release callback */ 964 static void session_free(struct kref *ref) 965 { 966 struct hidp_session *session = container_of(ref, struct hidp_session, 967 ref); 968 969 hidp_session_dev_destroy(session); 970 skb_queue_purge(&session->ctrl_transmit); 971 skb_queue_purge(&session->intr_transmit); 972 fput(session->intr_sock->file); 973 fput(session->ctrl_sock->file); 974 l2cap_conn_put(session->conn); 975 kfree(session); 976 } 977 978 /* decrease ref-count of the given session by one */ 979 static void hidp_session_put(struct hidp_session *session) 980 { 981 kref_put(&session->ref, session_free); 982 } 983 984 /* 985 * Search the list of active sessions for a session with target address 986 * \bdaddr. You must hold at least a read-lock on \hidp_session_sem. As long as 987 * you do not release this lock, the session objects cannot vanish and you can 988 * safely take a reference to the session yourself. 989 */ 990 static struct hidp_session *__hidp_session_find(const bdaddr_t *bdaddr) 991 { 992 struct hidp_session *session; 993 994 list_for_each_entry(session, &hidp_session_list, list) { 995 if (!bacmp(bdaddr, &session->bdaddr)) 996 return session; 997 } 998 999 return NULL; 1000 } 1001 1002 /* 1003 * Same as __hidp_session_find() but no locks must be held. This also takes a 1004 * reference of the returned session (if non-NULL) so you must drop this 1005 * reference if you no longer use the object. 1006 */ 1007 static struct hidp_session *hidp_session_find(const bdaddr_t *bdaddr) 1008 { 1009 struct hidp_session *session; 1010 1011 down_read(&hidp_session_sem); 1012 1013 session = __hidp_session_find(bdaddr); 1014 if (session) 1015 hidp_session_get(session); 1016 1017 up_read(&hidp_session_sem); 1018 1019 return session; 1020 } 1021 1022 /* 1023 * Start session synchronously 1024 * This starts a session thread and waits until initialization 1025 * is done or returns an error if it couldn't be started. 1026 * If this returns 0 the session thread is up and running. You must call 1027 * hipd_session_stop_sync() before deleting any runtime resources. 1028 */ 1029 static int hidp_session_start_sync(struct hidp_session *session) 1030 { 1031 unsigned int vendor, product; 1032 1033 if (session->hid) { 1034 vendor = session->hid->vendor; 1035 product = session->hid->product; 1036 } else if (session->input) { 1037 vendor = session->input->id.vendor; 1038 product = session->input->id.product; 1039 } else { 1040 vendor = 0x0000; 1041 product = 0x0000; 1042 } 1043 1044 session->task = kthread_run(hidp_session_thread, session, 1045 "khidpd_%04x%04x", vendor, product); 1046 if (IS_ERR(session->task)) 1047 return PTR_ERR(session->task); 1048 1049 while (atomic_read(&session->state) <= HIDP_SESSION_IDLING) 1050 wait_event(session->state_queue, 1051 atomic_read(&session->state) > HIDP_SESSION_IDLING); 1052 1053 return 0; 1054 } 1055 1056 /* 1057 * Terminate session thread 1058 * Wake up session thread and notify it to stop. This is asynchronous and 1059 * returns immediately. Call this whenever a runtime error occurs and you want 1060 * the session to stop. 1061 * Note: wake_up_process() performs any necessary memory-barriers for us. 1062 */ 1063 static void hidp_session_terminate(struct hidp_session *session) 1064 { 1065 atomic_inc(&session->terminate); 1066 wake_up_process(session->task); 1067 } 1068 1069 /* 1070 * Probe HIDP session 1071 * This is called from the l2cap_conn core when our l2cap_user object is bound 1072 * to the hci-connection. We get the session via the \user object and can now 1073 * start the session thread, link it into the global session list and 1074 * schedule HID/input device registration. 1075 * The global session-list owns its own reference to the session object so you 1076 * can drop your own reference after registering the l2cap_user object. 1077 */ 1078 static int hidp_session_probe(struct l2cap_conn *conn, 1079 struct l2cap_user *user) 1080 { 1081 struct hidp_session *session = container_of(user, 1082 struct hidp_session, 1083 user); 1084 struct hidp_session *s; 1085 int ret; 1086 1087 down_write(&hidp_session_sem); 1088 1089 /* check that no other session for this device exists */ 1090 s = __hidp_session_find(&session->bdaddr); 1091 if (s) { 1092 ret = -EEXIST; 1093 goto out_unlock; 1094 } 1095 1096 if (session->input) { 1097 ret = hidp_session_dev_add(session); 1098 if (ret) 1099 goto out_unlock; 1100 } 1101 1102 ret = hidp_session_start_sync(session); 1103 if (ret) 1104 goto out_del; 1105 1106 /* HID device registration is async to allow I/O during probe */ 1107 if (session->input) 1108 atomic_inc(&session->state); 1109 else 1110 schedule_work(&session->dev_init); 1111 1112 hidp_session_get(session); 1113 list_add(&session->list, &hidp_session_list); 1114 ret = 0; 1115 goto out_unlock; 1116 1117 out_del: 1118 if (session->input) 1119 hidp_session_dev_del(session); 1120 out_unlock: 1121 up_write(&hidp_session_sem); 1122 return ret; 1123 } 1124 1125 /* 1126 * Remove HIDP session 1127 * Called from the l2cap_conn core when either we explicitly unregistered 1128 * the l2cap_user object or if the underlying connection is shut down. 1129 * We signal the hidp-session thread to shut down, unregister the HID/input 1130 * devices and unlink the session from the global list. 1131 * This drops the reference to the session that is owned by the global 1132 * session-list. 1133 * Note: We _must_ not synchronosly wait for the session-thread to shut down. 1134 * This is, because the session-thread might be waiting for an HCI lock that is 1135 * held while we are called. Therefore, we only unregister the devices and 1136 * notify the session-thread to terminate. The thread itself owns a reference 1137 * to the session object so it can safely shut down. 1138 */ 1139 static void hidp_session_remove(struct l2cap_conn *conn, 1140 struct l2cap_user *user) 1141 { 1142 struct hidp_session *session = container_of(user, 1143 struct hidp_session, 1144 user); 1145 1146 down_write(&hidp_session_sem); 1147 1148 hidp_session_terminate(session); 1149 1150 cancel_work_sync(&session->dev_init); 1151 if (session->input || 1152 atomic_read(&session->state) > HIDP_SESSION_PREPARING) 1153 hidp_session_dev_del(session); 1154 1155 list_del(&session->list); 1156 1157 up_write(&hidp_session_sem); 1158 1159 hidp_session_put(session); 1160 } 1161 1162 /* 1163 * Session Worker 1164 * This performs the actual main-loop of the HIDP worker. We first check 1165 * whether the underlying connection is still alive, then parse all pending 1166 * messages and finally send all outstanding messages. 1167 */ 1168 static void hidp_session_run(struct hidp_session *session) 1169 { 1170 struct sock *ctrl_sk = session->ctrl_sock->sk; 1171 struct sock *intr_sk = session->intr_sock->sk; 1172 struct sk_buff *skb; 1173 1174 for (;;) { 1175 /* 1176 * This thread can be woken up two ways: 1177 * - You call hidp_session_terminate() which sets the 1178 * session->terminate flag and wakes this thread up. 1179 * - Via modifying the socket state of ctrl/intr_sock. This 1180 * thread is woken up by ->sk_state_changed(). 1181 * 1182 * Note: set_current_state() performs any necessary 1183 * memory-barriers for us. 1184 */ 1185 set_current_state(TASK_INTERRUPTIBLE); 1186 1187 if (atomic_read(&session->terminate)) 1188 break; 1189 1190 if (ctrl_sk->sk_state != BT_CONNECTED || 1191 intr_sk->sk_state != BT_CONNECTED) 1192 break; 1193 1194 /* parse incoming intr-skbs */ 1195 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 1196 skb_orphan(skb); 1197 if (!skb_linearize(skb)) 1198 hidp_recv_intr_frame(session, skb); 1199 else 1200 kfree_skb(skb); 1201 } 1202 1203 /* send pending intr-skbs */ 1204 hidp_process_transmit(session, &session->intr_transmit, 1205 session->intr_sock); 1206 1207 /* parse incoming ctrl-skbs */ 1208 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 1209 skb_orphan(skb); 1210 if (!skb_linearize(skb)) 1211 hidp_recv_ctrl_frame(session, skb); 1212 else 1213 kfree_skb(skb); 1214 } 1215 1216 /* send pending ctrl-skbs */ 1217 hidp_process_transmit(session, &session->ctrl_transmit, 1218 session->ctrl_sock); 1219 1220 schedule(); 1221 } 1222 1223 atomic_inc(&session->terminate); 1224 set_current_state(TASK_RUNNING); 1225 } 1226 1227 /* 1228 * HIDP session thread 1229 * This thread runs the I/O for a single HIDP session. Startup is synchronous 1230 * which allows us to take references to ourself here instead of doing that in 1231 * the caller. 1232 * When we are ready to run we notify the caller and call hidp_session_run(). 1233 */ 1234 static int hidp_session_thread(void *arg) 1235 { 1236 struct hidp_session *session = arg; 1237 wait_queue_t ctrl_wait, intr_wait; 1238 1239 BT_DBG("session %p", session); 1240 1241 /* initialize runtime environment */ 1242 hidp_session_get(session); 1243 __module_get(THIS_MODULE); 1244 set_user_nice(current, -15); 1245 hidp_set_timer(session); 1246 1247 init_waitqueue_entry(&ctrl_wait, current); 1248 init_waitqueue_entry(&intr_wait, current); 1249 add_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait); 1250 add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1251 /* This memory barrier is paired with wq_has_sleeper(). See 1252 * sock_poll_wait() for more information why this is needed. */ 1253 smp_mb(); 1254 1255 /* notify synchronous startup that we're ready */ 1256 atomic_inc(&session->state); 1257 wake_up(&session->state_queue); 1258 1259 /* run session */ 1260 hidp_session_run(session); 1261 1262 /* cleanup runtime environment */ 1263 remove_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1264 remove_wait_queue(sk_sleep(session->intr_sock->sk), &ctrl_wait); 1265 wake_up_interruptible(&session->report_queue); 1266 hidp_del_timer(session); 1267 1268 /* 1269 * If we stopped ourself due to any internal signal, we should try to 1270 * unregister our own session here to avoid having it linger until the 1271 * parent l2cap_conn dies or user-space cleans it up. 1272 * This does not deadlock as we don't do any synchronous shutdown. 1273 * Instead, this call has the same semantics as if user-space tried to 1274 * delete the session. 1275 */ 1276 l2cap_unregister_user(session->conn, &session->user); 1277 hidp_session_put(session); 1278 1279 module_put_and_exit(0); 1280 return 0; 1281 } 1282 1283 static int hidp_verify_sockets(struct socket *ctrl_sock, 1284 struct socket *intr_sock) 1285 { 1286 struct l2cap_chan *ctrl_chan, *intr_chan; 1287 struct bt_sock *ctrl, *intr; 1288 struct hidp_session *session; 1289 1290 if (!l2cap_is_socket(ctrl_sock) || !l2cap_is_socket(intr_sock)) 1291 return -EINVAL; 1292 1293 ctrl_chan = l2cap_pi(ctrl_sock->sk)->chan; 1294 intr_chan = l2cap_pi(intr_sock->sk)->chan; 1295 1296 if (bacmp(&ctrl_chan->src, &intr_chan->src) || 1297 bacmp(&ctrl_chan->dst, &intr_chan->dst)) 1298 return -ENOTUNIQ; 1299 1300 ctrl = bt_sk(ctrl_sock->sk); 1301 intr = bt_sk(intr_sock->sk); 1302 1303 if (ctrl->sk.sk_state != BT_CONNECTED || 1304 intr->sk.sk_state != BT_CONNECTED) 1305 return -EBADFD; 1306 1307 /* early session check, we check again during session registration */ 1308 session = hidp_session_find(&ctrl_chan->dst); 1309 if (session) { 1310 hidp_session_put(session); 1311 return -EEXIST; 1312 } 1313 1314 return 0; 1315 } 1316 1317 int hidp_connection_add(struct hidp_connadd_req *req, 1318 struct socket *ctrl_sock, 1319 struct socket *intr_sock) 1320 { 1321 struct hidp_session *session; 1322 struct l2cap_conn *conn; 1323 struct l2cap_chan *chan = l2cap_pi(ctrl_sock->sk)->chan; 1324 int ret; 1325 1326 ret = hidp_verify_sockets(ctrl_sock, intr_sock); 1327 if (ret) 1328 return ret; 1329 1330 conn = NULL; 1331 l2cap_chan_lock(chan); 1332 if (chan->conn) { 1333 l2cap_conn_get(chan->conn); 1334 conn = chan->conn; 1335 } 1336 l2cap_chan_unlock(chan); 1337 1338 if (!conn) 1339 return -EBADFD; 1340 1341 ret = hidp_session_new(&session, &chan->dst, ctrl_sock, 1342 intr_sock, req, conn); 1343 if (ret) 1344 goto out_conn; 1345 1346 ret = l2cap_register_user(conn, &session->user); 1347 if (ret) 1348 goto out_session; 1349 1350 ret = 0; 1351 1352 out_session: 1353 hidp_session_put(session); 1354 out_conn: 1355 l2cap_conn_put(conn); 1356 return ret; 1357 } 1358 1359 int hidp_connection_del(struct hidp_conndel_req *req) 1360 { 1361 struct hidp_session *session; 1362 1363 session = hidp_session_find(&req->bdaddr); 1364 if (!session) 1365 return -ENOENT; 1366 1367 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) 1368 hidp_send_ctrl_message(session, 1369 HIDP_TRANS_HID_CONTROL | 1370 HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, 1371 NULL, 0); 1372 else 1373 l2cap_unregister_user(session->conn, &session->user); 1374 1375 hidp_session_put(session); 1376 1377 return 0; 1378 } 1379 1380 int hidp_get_connlist(struct hidp_connlist_req *req) 1381 { 1382 struct hidp_session *session; 1383 int err = 0, n = 0; 1384 1385 BT_DBG(""); 1386 1387 down_read(&hidp_session_sem); 1388 1389 list_for_each_entry(session, &hidp_session_list, list) { 1390 struct hidp_conninfo ci; 1391 1392 hidp_copy_session(session, &ci); 1393 1394 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 1395 err = -EFAULT; 1396 break; 1397 } 1398 1399 if (++n >= req->cnum) 1400 break; 1401 1402 req->ci++; 1403 } 1404 req->cnum = n; 1405 1406 up_read(&hidp_session_sem); 1407 return err; 1408 } 1409 1410 int hidp_get_conninfo(struct hidp_conninfo *ci) 1411 { 1412 struct hidp_session *session; 1413 1414 session = hidp_session_find(&ci->bdaddr); 1415 if (session) { 1416 hidp_copy_session(session, ci); 1417 hidp_session_put(session); 1418 } 1419 1420 return session ? 0 : -ENOENT; 1421 } 1422 1423 static int __init hidp_init(void) 1424 { 1425 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 1426 1427 return hidp_init_sockets(); 1428 } 1429 1430 static void __exit hidp_exit(void) 1431 { 1432 hidp_cleanup_sockets(); 1433 } 1434 1435 module_init(hidp_init); 1436 module_exit(hidp_exit); 1437 1438 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 1439 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>"); 1440 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 1441 MODULE_VERSION(VERSION); 1442 MODULE_LICENSE("GPL"); 1443 MODULE_ALIAS("bt-proto-6"); 1444