1 /* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License version 2 as 7 published by the Free Software Foundation; 8 9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 20 SOFTWARE IS DISCLAIMED. 21 */ 22 23 #include <linux/module.h> 24 #include <linux/file.h> 25 #include <linux/kthread.h> 26 #include <linux/hidraw.h> 27 28 #include <net/bluetooth/bluetooth.h> 29 #include <net/bluetooth/hci_core.h> 30 #include <net/bluetooth/l2cap.h> 31 32 #include "hidp.h" 33 34 #define VERSION "1.2" 35 36 static DECLARE_RWSEM(hidp_session_sem); 37 static LIST_HEAD(hidp_session_list); 38 39 static unsigned char hidp_keycode[256] = { 40 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 41 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 42 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 43 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52, 44 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88, 45 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69, 46 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73, 47 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190, 48 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, 49 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94, 50 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0, 51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 52 0, 0, 0, 0, 0, 0, 0, 0, 0, 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 29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, 57 114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140 58 }; 59 60 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 61 62 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr) 63 { 64 struct hidp_session *session; 65 66 BT_DBG(""); 67 68 list_for_each_entry(session, &hidp_session_list, list) { 69 if (!bacmp(bdaddr, &session->bdaddr)) 70 return session; 71 } 72 73 return NULL; 74 } 75 76 static void __hidp_link_session(struct hidp_session *session) 77 { 78 list_add(&session->list, &hidp_session_list); 79 } 80 81 static void __hidp_unlink_session(struct hidp_session *session) 82 { 83 hci_conn_put_device(session->conn); 84 85 list_del(&session->list); 86 } 87 88 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) 89 { 90 memset(ci, 0, sizeof(*ci)); 91 bacpy(&ci->bdaddr, &session->bdaddr); 92 93 ci->flags = session->flags; 94 ci->state = session->state; 95 96 ci->vendor = 0x0000; 97 ci->product = 0x0000; 98 ci->version = 0x0000; 99 100 if (session->input) { 101 ci->vendor = session->input->id.vendor; 102 ci->product = session->input->id.product; 103 ci->version = session->input->id.version; 104 if (session->input->name) 105 strncpy(ci->name, session->input->name, 128); 106 else 107 strncpy(ci->name, "HID Boot Device", 128); 108 } 109 110 if (session->hid) { 111 ci->vendor = session->hid->vendor; 112 ci->product = session->hid->product; 113 ci->version = session->hid->version; 114 strncpy(ci->name, session->hid->name, 128); 115 } 116 } 117 118 static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev, 119 unsigned int type, unsigned int code, int value) 120 { 121 unsigned char newleds; 122 struct sk_buff *skb; 123 124 BT_DBG("session %p type %d code %d value %d", session, type, code, value); 125 126 if (type != EV_LED) 127 return -1; 128 129 newleds = (!!test_bit(LED_KANA, dev->led) << 3) | 130 (!!test_bit(LED_COMPOSE, dev->led) << 3) | 131 (!!test_bit(LED_SCROLLL, dev->led) << 2) | 132 (!!test_bit(LED_CAPSL, dev->led) << 1) | 133 (!!test_bit(LED_NUML, dev->led)); 134 135 if (session->leds == newleds) 136 return 0; 137 138 session->leds = newleds; 139 140 skb = alloc_skb(3, GFP_ATOMIC); 141 if (!skb) { 142 BT_ERR("Can't allocate memory for new frame"); 143 return -ENOMEM; 144 } 145 146 *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 147 *skb_put(skb, 1) = 0x01; 148 *skb_put(skb, 1) = newleds; 149 150 skb_queue_tail(&session->intr_transmit, skb); 151 152 hidp_schedule(session); 153 154 return 0; 155 } 156 157 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 158 { 159 struct hid_device *hid = input_get_drvdata(dev); 160 struct hidp_session *session = hid->driver_data; 161 162 return hidp_queue_event(session, dev, type, code, value); 163 } 164 165 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 166 { 167 struct hidp_session *session = input_get_drvdata(dev); 168 169 return hidp_queue_event(session, dev, type, code, value); 170 } 171 172 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) 173 { 174 struct input_dev *dev = session->input; 175 unsigned char *keys = session->keys; 176 unsigned char *udata = skb->data + 1; 177 signed char *sdata = skb->data + 1; 178 int i, size = skb->len - 1; 179 180 switch (skb->data[0]) { 181 case 0x01: /* Keyboard report */ 182 for (i = 0; i < 8; i++) 183 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); 184 185 /* If all the key codes have been set to 0x01, it means 186 * too many keys were pressed at the same time. */ 187 if (!memcmp(udata + 2, hidp_mkeyspat, 6)) 188 break; 189 190 for (i = 2; i < 8; i++) { 191 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { 192 if (hidp_keycode[keys[i]]) 193 input_report_key(dev, hidp_keycode[keys[i]], 0); 194 else 195 BT_ERR("Unknown key (scancode %#x) released.", keys[i]); 196 } 197 198 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { 199 if (hidp_keycode[udata[i]]) 200 input_report_key(dev, hidp_keycode[udata[i]], 1); 201 else 202 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); 203 } 204 } 205 206 memcpy(keys, udata, 8); 207 break; 208 209 case 0x02: /* Mouse report */ 210 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); 211 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); 212 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); 213 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); 214 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); 215 216 input_report_rel(dev, REL_X, sdata[1]); 217 input_report_rel(dev, REL_Y, sdata[2]); 218 219 if (size > 3) 220 input_report_rel(dev, REL_WHEEL, sdata[3]); 221 break; 222 } 223 224 input_sync(dev); 225 } 226 227 static int __hidp_send_ctrl_message(struct hidp_session *session, 228 unsigned char hdr, unsigned char *data, 229 int size) 230 { 231 struct sk_buff *skb; 232 233 BT_DBG("session %p data %p size %d", session, data, size); 234 235 if (atomic_read(&session->terminate)) 236 return -EIO; 237 238 skb = alloc_skb(size + 1, GFP_ATOMIC); 239 if (!skb) { 240 BT_ERR("Can't allocate memory for new frame"); 241 return -ENOMEM; 242 } 243 244 *skb_put(skb, 1) = hdr; 245 if (data && size > 0) 246 memcpy(skb_put(skb, size), data, size); 247 248 skb_queue_tail(&session->ctrl_transmit, skb); 249 250 return 0; 251 } 252 253 static int hidp_send_ctrl_message(struct hidp_session *session, 254 unsigned char hdr, unsigned char *data, int size) 255 { 256 int err; 257 258 err = __hidp_send_ctrl_message(session, hdr, data, size); 259 260 hidp_schedule(session); 261 262 return err; 263 } 264 265 static int hidp_queue_report(struct hidp_session *session, 266 unsigned char *data, int size) 267 { 268 struct sk_buff *skb; 269 270 BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size); 271 272 skb = alloc_skb(size + 1, GFP_ATOMIC); 273 if (!skb) { 274 BT_ERR("Can't allocate memory for new frame"); 275 return -ENOMEM; 276 } 277 278 *skb_put(skb, 1) = 0xa2; 279 if (size > 0) 280 memcpy(skb_put(skb, size), data, size); 281 282 skb_queue_tail(&session->intr_transmit, skb); 283 284 hidp_schedule(session); 285 286 return 0; 287 } 288 289 static int hidp_send_report(struct hidp_session *session, struct hid_report *report) 290 { 291 unsigned char buf[32]; 292 int rsize; 293 294 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0); 295 if (rsize > sizeof(buf)) 296 return -EIO; 297 298 hid_output_report(report, buf); 299 300 return hidp_queue_report(session, buf, rsize); 301 } 302 303 static int hidp_get_raw_report(struct hid_device *hid, 304 unsigned char report_number, 305 unsigned char *data, size_t count, 306 unsigned char report_type) 307 { 308 struct hidp_session *session = hid->driver_data; 309 struct sk_buff *skb; 310 size_t len; 311 int numbered_reports = hid->report_enum[report_type].numbered; 312 int ret; 313 314 switch (report_type) { 315 case HID_FEATURE_REPORT: 316 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE; 317 break; 318 case HID_INPUT_REPORT: 319 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT; 320 break; 321 case HID_OUTPUT_REPORT: 322 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT; 323 break; 324 default: 325 return -EINVAL; 326 } 327 328 if (mutex_lock_interruptible(&session->report_mutex)) 329 return -ERESTARTSYS; 330 331 /* Set up our wait, and send the report request to the device. */ 332 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK; 333 session->waiting_report_number = numbered_reports ? report_number : -1; 334 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 335 data[0] = report_number; 336 ret = hidp_send_ctrl_message(hid->driver_data, report_type, data, 1); 337 if (ret) 338 goto err; 339 340 /* Wait for the return of the report. The returned report 341 gets put in session->report_return. */ 342 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) { 343 int res; 344 345 res = wait_event_interruptible_timeout(session->report_queue, 346 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags), 347 5*HZ); 348 if (res == 0) { 349 /* timeout */ 350 ret = -EIO; 351 goto err; 352 } 353 if (res < 0) { 354 /* signal */ 355 ret = -ERESTARTSYS; 356 goto err; 357 } 358 } 359 360 skb = session->report_return; 361 if (skb) { 362 len = skb->len < count ? skb->len : count; 363 memcpy(data, skb->data, len); 364 365 kfree_skb(skb); 366 session->report_return = NULL; 367 } else { 368 /* Device returned a HANDSHAKE, indicating protocol error. */ 369 len = -EIO; 370 } 371 372 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 373 mutex_unlock(&session->report_mutex); 374 375 return len; 376 377 err: 378 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 379 mutex_unlock(&session->report_mutex); 380 return ret; 381 } 382 383 static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count, 384 unsigned char report_type) 385 { 386 struct hidp_session *session = hid->driver_data; 387 int ret; 388 389 switch (report_type) { 390 case HID_FEATURE_REPORT: 391 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE; 392 break; 393 case HID_OUTPUT_REPORT: 394 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT; 395 break; 396 default: 397 return -EINVAL; 398 } 399 400 if (mutex_lock_interruptible(&session->report_mutex)) 401 return -ERESTARTSYS; 402 403 /* Set up our wait, and send the report request to the device. */ 404 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 405 ret = hidp_send_ctrl_message(hid->driver_data, report_type, data, 406 count); 407 if (ret) 408 goto err; 409 410 /* Wait for the ACK from the device. */ 411 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) { 412 int res; 413 414 res = wait_event_interruptible_timeout(session->report_queue, 415 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags), 416 10*HZ); 417 if (res == 0) { 418 /* timeout */ 419 ret = -EIO; 420 goto err; 421 } 422 if (res < 0) { 423 /* signal */ 424 ret = -ERESTARTSYS; 425 goto err; 426 } 427 } 428 429 if (!session->output_report_success) { 430 ret = -EIO; 431 goto err; 432 } 433 434 ret = count; 435 436 err: 437 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 438 mutex_unlock(&session->report_mutex); 439 return ret; 440 } 441 442 static void hidp_idle_timeout(unsigned long arg) 443 { 444 struct hidp_session *session = (struct hidp_session *) arg; 445 446 atomic_inc(&session->terminate); 447 wake_up_process(session->task); 448 } 449 450 static void hidp_set_timer(struct hidp_session *session) 451 { 452 if (session->idle_to > 0) 453 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 454 } 455 456 static void hidp_del_timer(struct hidp_session *session) 457 { 458 if (session->idle_to > 0) 459 del_timer(&session->timer); 460 } 461 462 static void hidp_process_handshake(struct hidp_session *session, 463 unsigned char param) 464 { 465 BT_DBG("session %p param 0x%02x", session, param); 466 session->output_report_success = 0; /* default condition */ 467 468 switch (param) { 469 case HIDP_HSHK_SUCCESSFUL: 470 /* FIXME: Call into SET_ GET_ handlers here */ 471 session->output_report_success = 1; 472 break; 473 474 case HIDP_HSHK_NOT_READY: 475 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 476 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 477 case HIDP_HSHK_ERR_INVALID_PARAMETER: 478 if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) 479 wake_up_interruptible(&session->report_queue); 480 481 /* FIXME: Call into SET_ GET_ handlers here */ 482 break; 483 484 case HIDP_HSHK_ERR_UNKNOWN: 485 break; 486 487 case HIDP_HSHK_ERR_FATAL: 488 /* Device requests a reboot, as this is the only way this error 489 * can be recovered. */ 490 __hidp_send_ctrl_message(session, 491 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 492 break; 493 494 default: 495 __hidp_send_ctrl_message(session, 496 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 497 break; 498 } 499 500 /* Wake up the waiting thread. */ 501 if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) 502 wake_up_interruptible(&session->report_queue); 503 } 504 505 static void hidp_process_hid_control(struct hidp_session *session, 506 unsigned char param) 507 { 508 BT_DBG("session %p param 0x%02x", session, param); 509 510 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { 511 /* Flush the transmit queues */ 512 skb_queue_purge(&session->ctrl_transmit); 513 skb_queue_purge(&session->intr_transmit); 514 515 atomic_inc(&session->terminate); 516 wake_up_process(current); 517 } 518 } 519 520 /* Returns true if the passed-in skb should be freed by the caller. */ 521 static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb, 522 unsigned char param) 523 { 524 int done_with_skb = 1; 525 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 526 527 switch (param) { 528 case HIDP_DATA_RTYPE_INPUT: 529 hidp_set_timer(session); 530 531 if (session->input) 532 hidp_input_report(session, skb); 533 534 if (session->hid) 535 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0); 536 break; 537 538 case HIDP_DATA_RTYPE_OTHER: 539 case HIDP_DATA_RTYPE_OUPUT: 540 case HIDP_DATA_RTYPE_FEATURE: 541 break; 542 543 default: 544 __hidp_send_ctrl_message(session, 545 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 546 } 547 548 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 549 param == session->waiting_report_type) { 550 if (session->waiting_report_number < 0 || 551 session->waiting_report_number == skb->data[0]) { 552 /* hidp_get_raw_report() is waiting on this report. */ 553 session->report_return = skb; 554 done_with_skb = 0; 555 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 556 wake_up_interruptible(&session->report_queue); 557 } 558 } 559 560 return done_with_skb; 561 } 562 563 static void hidp_recv_ctrl_frame(struct hidp_session *session, 564 struct sk_buff *skb) 565 { 566 unsigned char hdr, type, param; 567 int free_skb = 1; 568 569 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 570 571 hdr = skb->data[0]; 572 skb_pull(skb, 1); 573 574 type = hdr & HIDP_HEADER_TRANS_MASK; 575 param = hdr & HIDP_HEADER_PARAM_MASK; 576 577 switch (type) { 578 case HIDP_TRANS_HANDSHAKE: 579 hidp_process_handshake(session, param); 580 break; 581 582 case HIDP_TRANS_HID_CONTROL: 583 hidp_process_hid_control(session, param); 584 break; 585 586 case HIDP_TRANS_DATA: 587 free_skb = hidp_process_data(session, skb, param); 588 break; 589 590 default: 591 __hidp_send_ctrl_message(session, 592 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 593 break; 594 } 595 596 if (free_skb) 597 kfree_skb(skb); 598 } 599 600 static void hidp_recv_intr_frame(struct hidp_session *session, 601 struct sk_buff *skb) 602 { 603 unsigned char hdr; 604 605 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 606 607 hdr = skb->data[0]; 608 skb_pull(skb, 1); 609 610 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 611 hidp_set_timer(session); 612 613 if (session->input) 614 hidp_input_report(session, skb); 615 616 if (session->hid) { 617 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1); 618 BT_DBG("report len %d", skb->len); 619 } 620 } else { 621 BT_DBG("Unsupported protocol header 0x%02x", hdr); 622 } 623 624 kfree_skb(skb); 625 } 626 627 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 628 { 629 struct kvec iv = { data, len }; 630 struct msghdr msg; 631 632 BT_DBG("sock %p data %p len %d", sock, data, len); 633 634 if (!len) 635 return 0; 636 637 memset(&msg, 0, sizeof(msg)); 638 639 return kernel_sendmsg(sock, &msg, &iv, 1, len); 640 } 641 642 static void hidp_process_intr_transmit(struct hidp_session *session) 643 { 644 struct sk_buff *skb; 645 646 BT_DBG("session %p", session); 647 648 while ((skb = skb_dequeue(&session->intr_transmit))) { 649 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) { 650 skb_queue_head(&session->intr_transmit, skb); 651 break; 652 } 653 654 hidp_set_timer(session); 655 kfree_skb(skb); 656 } 657 } 658 659 static void hidp_process_ctrl_transmit(struct hidp_session *session) 660 { 661 struct sk_buff *skb; 662 663 BT_DBG("session %p", session); 664 665 while ((skb = skb_dequeue(&session->ctrl_transmit))) { 666 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) { 667 skb_queue_head(&session->ctrl_transmit, skb); 668 break; 669 } 670 671 hidp_set_timer(session); 672 kfree_skb(skb); 673 } 674 } 675 676 static int hidp_session(void *arg) 677 { 678 struct hidp_session *session = arg; 679 struct sock *ctrl_sk = session->ctrl_sock->sk; 680 struct sock *intr_sk = session->intr_sock->sk; 681 struct sk_buff *skb; 682 wait_queue_t ctrl_wait, intr_wait; 683 684 BT_DBG("session %p", session); 685 686 __module_get(THIS_MODULE); 687 set_user_nice(current, -15); 688 689 init_waitqueue_entry(&ctrl_wait, current); 690 init_waitqueue_entry(&intr_wait, current); 691 add_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait); 692 add_wait_queue(sk_sleep(intr_sk), &intr_wait); 693 session->waiting_for_startup = 0; 694 wake_up_interruptible(&session->startup_queue); 695 set_current_state(TASK_INTERRUPTIBLE); 696 while (!atomic_read(&session->terminate)) { 697 if (ctrl_sk->sk_state != BT_CONNECTED || 698 intr_sk->sk_state != BT_CONNECTED) 699 break; 700 701 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 702 skb_orphan(skb); 703 if (!skb_linearize(skb)) 704 hidp_recv_intr_frame(session, skb); 705 else 706 kfree_skb(skb); 707 } 708 709 hidp_process_intr_transmit(session); 710 711 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 712 skb_orphan(skb); 713 if (!skb_linearize(skb)) 714 hidp_recv_ctrl_frame(session, skb); 715 else 716 kfree_skb(skb); 717 } 718 719 hidp_process_ctrl_transmit(session); 720 721 schedule(); 722 set_current_state(TASK_INTERRUPTIBLE); 723 } 724 set_current_state(TASK_RUNNING); 725 remove_wait_queue(sk_sleep(intr_sk), &intr_wait); 726 remove_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait); 727 728 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 729 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 730 wake_up_interruptible(&session->report_queue); 731 732 down_write(&hidp_session_sem); 733 734 hidp_del_timer(session); 735 736 if (session->input) { 737 input_unregister_device(session->input); 738 session->input = NULL; 739 } 740 741 if (session->hid) { 742 hid_destroy_device(session->hid); 743 session->hid = NULL; 744 } 745 746 /* Wakeup user-space polling for socket errors */ 747 session->intr_sock->sk->sk_err = EUNATCH; 748 session->ctrl_sock->sk->sk_err = EUNATCH; 749 750 hidp_schedule(session); 751 752 fput(session->intr_sock->file); 753 754 wait_event_timeout(*(sk_sleep(ctrl_sk)), 755 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500)); 756 757 fput(session->ctrl_sock->file); 758 759 __hidp_unlink_session(session); 760 761 up_write(&hidp_session_sem); 762 763 kfree(session->rd_data); 764 kfree(session); 765 module_put_and_exit(0); 766 return 0; 767 } 768 769 static struct hci_conn *hidp_get_connection(struct hidp_session *session) 770 { 771 bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src; 772 bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst; 773 struct hci_conn *conn; 774 struct hci_dev *hdev; 775 776 hdev = hci_get_route(dst, src); 777 if (!hdev) 778 return NULL; 779 780 hci_dev_lock(hdev); 781 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); 782 if (conn) 783 hci_conn_hold_device(conn); 784 hci_dev_unlock(hdev); 785 786 hci_dev_put(hdev); 787 788 return conn; 789 } 790 791 static int hidp_setup_input(struct hidp_session *session, 792 struct hidp_connadd_req *req) 793 { 794 struct input_dev *input; 795 int i; 796 797 input = input_allocate_device(); 798 if (!input) 799 return -ENOMEM; 800 801 session->input = input; 802 803 input_set_drvdata(input, session); 804 805 input->name = "Bluetooth HID Boot Protocol Device"; 806 807 input->id.bustype = BUS_BLUETOOTH; 808 input->id.vendor = req->vendor; 809 input->id.product = req->product; 810 input->id.version = req->version; 811 812 if (req->subclass & 0x40) { 813 set_bit(EV_KEY, input->evbit); 814 set_bit(EV_LED, input->evbit); 815 set_bit(EV_REP, input->evbit); 816 817 set_bit(LED_NUML, input->ledbit); 818 set_bit(LED_CAPSL, input->ledbit); 819 set_bit(LED_SCROLLL, input->ledbit); 820 set_bit(LED_COMPOSE, input->ledbit); 821 set_bit(LED_KANA, input->ledbit); 822 823 for (i = 0; i < sizeof(hidp_keycode); i++) 824 set_bit(hidp_keycode[i], input->keybit); 825 clear_bit(0, input->keybit); 826 } 827 828 if (req->subclass & 0x80) { 829 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 830 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 831 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 832 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 833 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 834 BIT_MASK(BTN_EXTRA); 835 input->relbit[0] |= BIT_MASK(REL_WHEEL); 836 } 837 838 input->dev.parent = &session->conn->dev; 839 840 input->event = hidp_input_event; 841 842 return 0; 843 } 844 845 static int hidp_open(struct hid_device *hid) 846 { 847 return 0; 848 } 849 850 static void hidp_close(struct hid_device *hid) 851 { 852 } 853 854 static int hidp_parse(struct hid_device *hid) 855 { 856 struct hidp_session *session = hid->driver_data; 857 858 return hid_parse_report(session->hid, session->rd_data, 859 session->rd_size); 860 } 861 862 static int hidp_start(struct hid_device *hid) 863 { 864 struct hidp_session *session = hid->driver_data; 865 struct hid_report *report; 866 867 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 868 return 0; 869 870 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT]. 871 report_list, list) 872 hidp_send_report(session, report); 873 874 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT]. 875 report_list, list) 876 hidp_send_report(session, report); 877 878 return 0; 879 } 880 881 static void hidp_stop(struct hid_device *hid) 882 { 883 struct hidp_session *session = hid->driver_data; 884 885 skb_queue_purge(&session->ctrl_transmit); 886 skb_queue_purge(&session->intr_transmit); 887 888 hid->claimed = 0; 889 } 890 891 static struct hid_ll_driver hidp_hid_driver = { 892 .parse = hidp_parse, 893 .start = hidp_start, 894 .stop = hidp_stop, 895 .open = hidp_open, 896 .close = hidp_close, 897 .hidinput_input_event = hidp_hidinput_event, 898 }; 899 900 /* This function sets up the hid device. It does not add it 901 to the HID system. That is done in hidp_add_connection(). */ 902 static int hidp_setup_hid(struct hidp_session *session, 903 struct hidp_connadd_req *req) 904 { 905 struct hid_device *hid; 906 int err; 907 908 session->rd_data = kzalloc(req->rd_size, GFP_KERNEL); 909 if (!session->rd_data) 910 return -ENOMEM; 911 912 if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) { 913 err = -EFAULT; 914 goto fault; 915 } 916 session->rd_size = req->rd_size; 917 918 hid = hid_allocate_device(); 919 if (IS_ERR(hid)) { 920 err = PTR_ERR(hid); 921 goto fault; 922 } 923 924 session->hid = hid; 925 926 hid->driver_data = session; 927 928 hid->bus = BUS_BLUETOOTH; 929 hid->vendor = req->vendor; 930 hid->product = req->product; 931 hid->version = req->version; 932 hid->country = req->country; 933 934 strncpy(hid->name, req->name, 128); 935 936 snprintf(hid->phys, sizeof(hid->phys), "%pMR", 937 &bt_sk(session->ctrl_sock->sk)->src); 938 939 snprintf(hid->uniq, sizeof(hid->uniq), "%pMR", 940 &bt_sk(session->ctrl_sock->sk)->dst); 941 942 hid->dev.parent = &session->conn->dev; 943 hid->ll_driver = &hidp_hid_driver; 944 945 hid->hid_get_raw_report = hidp_get_raw_report; 946 hid->hid_output_raw_report = hidp_output_raw_report; 947 948 /* True if device is blacklisted in drivers/hid/hid-core.c */ 949 if (hid_ignore(hid)) { 950 hid_destroy_device(session->hid); 951 session->hid = NULL; 952 return -ENODEV; 953 } 954 955 return 0; 956 957 fault: 958 kfree(session->rd_data); 959 session->rd_data = NULL; 960 961 return err; 962 } 963 964 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock) 965 { 966 struct hidp_session *session, *s; 967 int vendor, product; 968 int err; 969 970 BT_DBG(""); 971 972 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) || 973 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst)) 974 return -ENOTUNIQ; 975 976 BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size); 977 978 down_write(&hidp_session_sem); 979 980 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst); 981 if (s && s->state == BT_CONNECTED) { 982 up_write(&hidp_session_sem); 983 return -EEXIST; 984 } 985 986 session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL); 987 if (!session) { 988 up_write(&hidp_session_sem); 989 return -ENOMEM; 990 } 991 992 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst); 993 994 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->chan->omtu, 995 l2cap_pi(ctrl_sock->sk)->chan->imtu); 996 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->chan->omtu, 997 l2cap_pi(intr_sock->sk)->chan->imtu); 998 999 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu); 1000 1001 session->ctrl_sock = ctrl_sock; 1002 session->intr_sock = intr_sock; 1003 session->state = BT_CONNECTED; 1004 1005 session->conn = hidp_get_connection(session); 1006 if (!session->conn) { 1007 err = -ENOTCONN; 1008 goto failed; 1009 } 1010 1011 setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session); 1012 1013 skb_queue_head_init(&session->ctrl_transmit); 1014 skb_queue_head_init(&session->intr_transmit); 1015 1016 mutex_init(&session->report_mutex); 1017 init_waitqueue_head(&session->report_queue); 1018 init_waitqueue_head(&session->startup_queue); 1019 session->waiting_for_startup = 1; 1020 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); 1021 session->idle_to = req->idle_to; 1022 1023 __hidp_link_session(session); 1024 1025 if (req->rd_size > 0) { 1026 err = hidp_setup_hid(session, req); 1027 if (err && err != -ENODEV) 1028 goto purge; 1029 } 1030 1031 if (!session->hid) { 1032 err = hidp_setup_input(session, req); 1033 if (err < 0) 1034 goto purge; 1035 } 1036 1037 hidp_set_timer(session); 1038 1039 if (session->hid) { 1040 vendor = session->hid->vendor; 1041 product = session->hid->product; 1042 } else if (session->input) { 1043 vendor = session->input->id.vendor; 1044 product = session->input->id.product; 1045 } else { 1046 vendor = 0x0000; 1047 product = 0x0000; 1048 } 1049 1050 session->task = kthread_run(hidp_session, session, "khidpd_%04x%04x", 1051 vendor, product); 1052 if (IS_ERR(session->task)) { 1053 err = PTR_ERR(session->task); 1054 goto unlink; 1055 } 1056 1057 while (session->waiting_for_startup) { 1058 wait_event_interruptible(session->startup_queue, 1059 !session->waiting_for_startup); 1060 } 1061 1062 if (session->hid) 1063 err = hid_add_device(session->hid); 1064 else 1065 err = input_register_device(session->input); 1066 1067 if (err < 0) { 1068 atomic_inc(&session->terminate); 1069 wake_up_process(session->task); 1070 up_write(&hidp_session_sem); 1071 return err; 1072 } 1073 1074 if (session->input) { 1075 hidp_send_ctrl_message(session, 1076 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0); 1077 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE); 1078 1079 session->leds = 0xff; 1080 hidp_input_event(session->input, EV_LED, 0, 0); 1081 } 1082 1083 up_write(&hidp_session_sem); 1084 return 0; 1085 1086 unlink: 1087 hidp_del_timer(session); 1088 1089 if (session->input) { 1090 input_unregister_device(session->input); 1091 session->input = NULL; 1092 } 1093 1094 if (session->hid) { 1095 hid_destroy_device(session->hid); 1096 session->hid = NULL; 1097 } 1098 1099 kfree(session->rd_data); 1100 session->rd_data = NULL; 1101 1102 purge: 1103 __hidp_unlink_session(session); 1104 1105 skb_queue_purge(&session->ctrl_transmit); 1106 skb_queue_purge(&session->intr_transmit); 1107 1108 failed: 1109 up_write(&hidp_session_sem); 1110 1111 kfree(session); 1112 return err; 1113 } 1114 1115 int hidp_del_connection(struct hidp_conndel_req *req) 1116 { 1117 struct hidp_session *session; 1118 int err = 0; 1119 1120 BT_DBG(""); 1121 1122 down_read(&hidp_session_sem); 1123 1124 session = __hidp_get_session(&req->bdaddr); 1125 if (session) { 1126 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) { 1127 hidp_send_ctrl_message(session, 1128 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0); 1129 } else { 1130 /* Flush the transmit queues */ 1131 skb_queue_purge(&session->ctrl_transmit); 1132 skb_queue_purge(&session->intr_transmit); 1133 1134 atomic_inc(&session->terminate); 1135 wake_up_process(session->task); 1136 } 1137 } else 1138 err = -ENOENT; 1139 1140 up_read(&hidp_session_sem); 1141 return err; 1142 } 1143 1144 int hidp_get_connlist(struct hidp_connlist_req *req) 1145 { 1146 struct hidp_session *session; 1147 int err = 0, n = 0; 1148 1149 BT_DBG(""); 1150 1151 down_read(&hidp_session_sem); 1152 1153 list_for_each_entry(session, &hidp_session_list, list) { 1154 struct hidp_conninfo ci; 1155 1156 __hidp_copy_session(session, &ci); 1157 1158 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 1159 err = -EFAULT; 1160 break; 1161 } 1162 1163 if (++n >= req->cnum) 1164 break; 1165 1166 req->ci++; 1167 } 1168 req->cnum = n; 1169 1170 up_read(&hidp_session_sem); 1171 return err; 1172 } 1173 1174 int hidp_get_conninfo(struct hidp_conninfo *ci) 1175 { 1176 struct hidp_session *session; 1177 int err = 0; 1178 1179 down_read(&hidp_session_sem); 1180 1181 session = __hidp_get_session(&ci->bdaddr); 1182 if (session) 1183 __hidp_copy_session(session, ci); 1184 else 1185 err = -ENOENT; 1186 1187 up_read(&hidp_session_sem); 1188 return err; 1189 } 1190 1191 static int __init hidp_init(void) 1192 { 1193 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 1194 1195 return hidp_init_sockets(); 1196 } 1197 1198 static void __exit hidp_exit(void) 1199 { 1200 hidp_cleanup_sockets(); 1201 } 1202 1203 module_init(hidp_init); 1204 module_exit(hidp_exit); 1205 1206 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 1207 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 1208 MODULE_VERSION(VERSION); 1209 MODULE_LICENSE("GPL"); 1210 MODULE_ALIAS("bt-proto-6"); 1211