1 /* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License version 2 as 7 published by the Free Software Foundation; 8 9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 20 SOFTWARE IS DISCLAIMED. 21 */ 22 23 #include <linux/module.h> 24 25 #include <linux/types.h> 26 #include <linux/errno.h> 27 #include <linux/kernel.h> 28 #include <linux/sched.h> 29 #include <linux/slab.h> 30 #include <linux/poll.h> 31 #include <linux/freezer.h> 32 #include <linux/fcntl.h> 33 #include <linux/skbuff.h> 34 #include <linux/socket.h> 35 #include <linux/ioctl.h> 36 #include <linux/file.h> 37 #include <linux/init.h> 38 #include <linux/wait.h> 39 #include <net/sock.h> 40 41 #include <linux/input.h> 42 #include <linux/hid.h> 43 44 #include <net/bluetooth/bluetooth.h> 45 #include <net/bluetooth/hci_core.h> 46 #include <net/bluetooth/l2cap.h> 47 48 #include "hidp.h" 49 50 #ifndef CONFIG_BT_HIDP_DEBUG 51 #undef BT_DBG 52 #define BT_DBG(D...) 53 #endif 54 55 #define VERSION "1.2" 56 57 static DECLARE_RWSEM(hidp_session_sem); 58 static LIST_HEAD(hidp_session_list); 59 60 static unsigned char hidp_keycode[256] = { 61 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 62 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 63 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 64 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 65 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 66 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 67 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 68 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 69 115,114, 0, 0, 0,121, 0, 89, 93,124, 92, 94, 95, 0, 0, 0, 70 122,123, 90, 91, 85, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 71 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 72 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 73 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 74 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 75 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 76 150,158,159,128,136,177,178,176,142,152,173,140 77 }; 78 79 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 80 81 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr) 82 { 83 struct hidp_session *session; 84 struct list_head *p; 85 86 BT_DBG(""); 87 88 list_for_each(p, &hidp_session_list) { 89 session = list_entry(p, struct hidp_session, list); 90 if (!bacmp(bdaddr, &session->bdaddr)) 91 return session; 92 } 93 return NULL; 94 } 95 96 static void __hidp_link_session(struct hidp_session *session) 97 { 98 __module_get(THIS_MODULE); 99 list_add(&session->list, &hidp_session_list); 100 } 101 102 static void __hidp_unlink_session(struct hidp_session *session) 103 { 104 list_del(&session->list); 105 module_put(THIS_MODULE); 106 } 107 108 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) 109 { 110 bacpy(&ci->bdaddr, &session->bdaddr); 111 112 ci->flags = session->flags; 113 ci->state = session->state; 114 115 ci->vendor = 0x0000; 116 ci->product = 0x0000; 117 ci->version = 0x0000; 118 memset(ci->name, 0, 128); 119 120 if (session->input) { 121 ci->vendor = session->input->id.vendor; 122 ci->product = session->input->id.product; 123 ci->version = session->input->id.version; 124 if (session->input->name) 125 strncpy(ci->name, session->input->name, 128); 126 else 127 strncpy(ci->name, "HID Boot Device", 128); 128 } 129 130 if (session->hid) { 131 ci->vendor = session->hid->vendor; 132 ci->product = session->hid->product; 133 ci->version = session->hid->version; 134 strncpy(ci->name, session->hid->name, 128); 135 } 136 } 137 138 static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev, 139 unsigned int type, unsigned int code, int value) 140 { 141 unsigned char newleds; 142 struct sk_buff *skb; 143 144 BT_DBG("session %p type %d code %d value %d", session, type, code, value); 145 146 if (type != EV_LED) 147 return -1; 148 149 newleds = (!!test_bit(LED_KANA, dev->led) << 3) | 150 (!!test_bit(LED_COMPOSE, dev->led) << 3) | 151 (!!test_bit(LED_SCROLLL, dev->led) << 2) | 152 (!!test_bit(LED_CAPSL, dev->led) << 1) | 153 (!!test_bit(LED_NUML, dev->led)); 154 155 if (session->leds == newleds) 156 return 0; 157 158 session->leds = newleds; 159 160 if (!(skb = alloc_skb(3, GFP_ATOMIC))) { 161 BT_ERR("Can't allocate memory for new frame"); 162 return -ENOMEM; 163 } 164 165 *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 166 *skb_put(skb, 1) = 0x01; 167 *skb_put(skb, 1) = newleds; 168 169 skb_queue_tail(&session->intr_transmit, skb); 170 171 hidp_schedule(session); 172 173 return 0; 174 } 175 176 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 177 { 178 struct hid_device *hid = input_get_drvdata(dev); 179 struct hidp_session *session = hid->driver_data; 180 181 return hidp_queue_event(session, dev, type, code, value); 182 } 183 184 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 185 { 186 struct hidp_session *session = input_get_drvdata(dev); 187 188 return hidp_queue_event(session, dev, type, code, value); 189 } 190 191 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) 192 { 193 struct input_dev *dev = session->input; 194 unsigned char *keys = session->keys; 195 unsigned char *udata = skb->data + 1; 196 signed char *sdata = skb->data + 1; 197 int i, size = skb->len - 1; 198 199 switch (skb->data[0]) { 200 case 0x01: /* Keyboard report */ 201 for (i = 0; i < 8; i++) 202 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); 203 204 /* If all the key codes have been set to 0x01, it means 205 * too many keys were pressed at the same time. */ 206 if (!memcmp(udata + 2, hidp_mkeyspat, 6)) 207 break; 208 209 for (i = 2; i < 8; i++) { 210 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { 211 if (hidp_keycode[keys[i]]) 212 input_report_key(dev, hidp_keycode[keys[i]], 0); 213 else 214 BT_ERR("Unknown key (scancode %#x) released.", keys[i]); 215 } 216 217 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { 218 if (hidp_keycode[udata[i]]) 219 input_report_key(dev, hidp_keycode[udata[i]], 1); 220 else 221 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); 222 } 223 } 224 225 memcpy(keys, udata, 8); 226 break; 227 228 case 0x02: /* Mouse report */ 229 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); 230 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); 231 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); 232 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); 233 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); 234 235 input_report_rel(dev, REL_X, sdata[1]); 236 input_report_rel(dev, REL_Y, sdata[2]); 237 238 if (size > 3) 239 input_report_rel(dev, REL_WHEEL, sdata[3]); 240 break; 241 } 242 243 input_sync(dev); 244 } 245 246 static int hidp_queue_report(struct hidp_session *session, 247 unsigned char *data, int size) 248 { 249 struct sk_buff *skb; 250 251 BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size); 252 253 if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) { 254 BT_ERR("Can't allocate memory for new frame"); 255 return -ENOMEM; 256 } 257 258 *skb_put(skb, 1) = 0xa2; 259 if (size > 0) 260 memcpy(skb_put(skb, size), data, size); 261 262 skb_queue_tail(&session->intr_transmit, skb); 263 264 hidp_schedule(session); 265 266 return 0; 267 } 268 269 static int hidp_send_report(struct hidp_session *session, struct hid_report *report) 270 { 271 unsigned char buf[32]; 272 int rsize; 273 274 rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0); 275 if (rsize > sizeof(buf)) 276 return -EIO; 277 278 hid_output_report(report, buf); 279 280 return hidp_queue_report(session, buf, rsize); 281 } 282 283 static void hidp_idle_timeout(unsigned long arg) 284 { 285 struct hidp_session *session = (struct hidp_session *) arg; 286 287 atomic_inc(&session->terminate); 288 hidp_schedule(session); 289 } 290 291 static void hidp_set_timer(struct hidp_session *session) 292 { 293 if (session->idle_to > 0) 294 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 295 } 296 297 static inline void hidp_del_timer(struct hidp_session *session) 298 { 299 if (session->idle_to > 0) 300 del_timer(&session->timer); 301 } 302 303 static int __hidp_send_ctrl_message(struct hidp_session *session, 304 unsigned char hdr, unsigned char *data, int size) 305 { 306 struct sk_buff *skb; 307 308 BT_DBG("session %p data %p size %d", session, data, size); 309 310 if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) { 311 BT_ERR("Can't allocate memory for new frame"); 312 return -ENOMEM; 313 } 314 315 *skb_put(skb, 1) = hdr; 316 if (data && size > 0) 317 memcpy(skb_put(skb, size), data, size); 318 319 skb_queue_tail(&session->ctrl_transmit, skb); 320 321 return 0; 322 } 323 324 static inline int hidp_send_ctrl_message(struct hidp_session *session, 325 unsigned char hdr, unsigned char *data, int size) 326 { 327 int err; 328 329 err = __hidp_send_ctrl_message(session, hdr, data, size); 330 331 hidp_schedule(session); 332 333 return err; 334 } 335 336 static void hidp_process_handshake(struct hidp_session *session, 337 unsigned char param) 338 { 339 BT_DBG("session %p param 0x%02x", session, param); 340 341 switch (param) { 342 case HIDP_HSHK_SUCCESSFUL: 343 /* FIXME: Call into SET_ GET_ handlers here */ 344 break; 345 346 case HIDP_HSHK_NOT_READY: 347 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 348 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 349 case HIDP_HSHK_ERR_INVALID_PARAMETER: 350 /* FIXME: Call into SET_ GET_ handlers here */ 351 break; 352 353 case HIDP_HSHK_ERR_UNKNOWN: 354 break; 355 356 case HIDP_HSHK_ERR_FATAL: 357 /* Device requests a reboot, as this is the only way this error 358 * can be recovered. */ 359 __hidp_send_ctrl_message(session, 360 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 361 break; 362 363 default: 364 __hidp_send_ctrl_message(session, 365 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 366 break; 367 } 368 } 369 370 static void hidp_process_hid_control(struct hidp_session *session, 371 unsigned char param) 372 { 373 BT_DBG("session %p param 0x%02x", session, param); 374 375 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { 376 /* Flush the transmit queues */ 377 skb_queue_purge(&session->ctrl_transmit); 378 skb_queue_purge(&session->intr_transmit); 379 380 /* Kill session thread */ 381 atomic_inc(&session->terminate); 382 } 383 } 384 385 static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb, 386 unsigned char param) 387 { 388 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 389 390 switch (param) { 391 case HIDP_DATA_RTYPE_INPUT: 392 hidp_set_timer(session); 393 394 if (session->input) 395 hidp_input_report(session, skb); 396 397 if (session->hid) 398 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0); 399 400 break; 401 402 case HIDP_DATA_RTYPE_OTHER: 403 case HIDP_DATA_RTYPE_OUPUT: 404 case HIDP_DATA_RTYPE_FEATURE: 405 break; 406 407 default: 408 __hidp_send_ctrl_message(session, 409 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 410 } 411 } 412 413 static void hidp_recv_ctrl_frame(struct hidp_session *session, 414 struct sk_buff *skb) 415 { 416 unsigned char hdr, type, param; 417 418 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 419 420 hdr = skb->data[0]; 421 skb_pull(skb, 1); 422 423 type = hdr & HIDP_HEADER_TRANS_MASK; 424 param = hdr & HIDP_HEADER_PARAM_MASK; 425 426 switch (type) { 427 case HIDP_TRANS_HANDSHAKE: 428 hidp_process_handshake(session, param); 429 break; 430 431 case HIDP_TRANS_HID_CONTROL: 432 hidp_process_hid_control(session, param); 433 break; 434 435 case HIDP_TRANS_DATA: 436 hidp_process_data(session, skb, param); 437 break; 438 439 default: 440 __hidp_send_ctrl_message(session, 441 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 442 break; 443 } 444 445 kfree_skb(skb); 446 } 447 448 static void hidp_recv_intr_frame(struct hidp_session *session, 449 struct sk_buff *skb) 450 { 451 unsigned char hdr; 452 453 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 454 455 hdr = skb->data[0]; 456 skb_pull(skb, 1); 457 458 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 459 hidp_set_timer(session); 460 461 if (session->input) 462 hidp_input_report(session, skb); 463 464 if (session->hid) { 465 hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1); 466 BT_DBG("report len %d", skb->len); 467 } 468 } else { 469 BT_DBG("Unsupported protocol header 0x%02x", hdr); 470 } 471 472 kfree_skb(skb); 473 } 474 475 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 476 { 477 struct kvec iv = { data, len }; 478 struct msghdr msg; 479 480 BT_DBG("sock %p data %p len %d", sock, data, len); 481 482 if (!len) 483 return 0; 484 485 memset(&msg, 0, sizeof(msg)); 486 487 return kernel_sendmsg(sock, &msg, &iv, 1, len); 488 } 489 490 static void hidp_process_transmit(struct hidp_session *session) 491 { 492 struct sk_buff *skb; 493 494 BT_DBG("session %p", session); 495 496 while ((skb = skb_dequeue(&session->ctrl_transmit))) { 497 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) { 498 skb_queue_head(&session->ctrl_transmit, skb); 499 break; 500 } 501 502 hidp_set_timer(session); 503 kfree_skb(skb); 504 } 505 506 while ((skb = skb_dequeue(&session->intr_transmit))) { 507 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) { 508 skb_queue_head(&session->intr_transmit, skb); 509 break; 510 } 511 512 hidp_set_timer(session); 513 kfree_skb(skb); 514 } 515 } 516 517 static int hidp_session(void *arg) 518 { 519 struct hidp_session *session = arg; 520 struct sock *ctrl_sk = session->ctrl_sock->sk; 521 struct sock *intr_sk = session->intr_sock->sk; 522 struct sk_buff *skb; 523 int vendor = 0x0000, product = 0x0000; 524 wait_queue_t ctrl_wait, intr_wait; 525 526 BT_DBG("session %p", session); 527 528 if (session->input) { 529 vendor = session->input->id.vendor; 530 product = session->input->id.product; 531 } 532 533 if (session->hid) { 534 vendor = session->hid->vendor; 535 product = session->hid->product; 536 } 537 538 daemonize("khidpd_%04x%04x", vendor, product); 539 set_user_nice(current, -15); 540 541 init_waitqueue_entry(&ctrl_wait, current); 542 init_waitqueue_entry(&intr_wait, current); 543 add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait); 544 add_wait_queue(intr_sk->sk_sleep, &intr_wait); 545 while (!atomic_read(&session->terminate)) { 546 set_current_state(TASK_INTERRUPTIBLE); 547 548 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED) 549 break; 550 551 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 552 skb_orphan(skb); 553 hidp_recv_ctrl_frame(session, skb); 554 } 555 556 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 557 skb_orphan(skb); 558 hidp_recv_intr_frame(session, skb); 559 } 560 561 hidp_process_transmit(session); 562 563 schedule(); 564 } 565 set_current_state(TASK_RUNNING); 566 remove_wait_queue(intr_sk->sk_sleep, &intr_wait); 567 remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait); 568 569 down_write(&hidp_session_sem); 570 571 hidp_del_timer(session); 572 573 if (session->input) { 574 input_unregister_device(session->input); 575 session->input = NULL; 576 } 577 578 if (session->hid) { 579 if (session->hid->claimed & HID_CLAIMED_INPUT) 580 hidinput_disconnect(session->hid); 581 hid_free_device(session->hid); 582 } 583 584 /* Wakeup user-space polling for socket errors */ 585 session->intr_sock->sk->sk_err = EUNATCH; 586 session->ctrl_sock->sk->sk_err = EUNATCH; 587 588 hidp_schedule(session); 589 590 fput(session->intr_sock->file); 591 592 wait_event_timeout(*(ctrl_sk->sk_sleep), 593 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500)); 594 595 fput(session->ctrl_sock->file); 596 597 __hidp_unlink_session(session); 598 599 up_write(&hidp_session_sem); 600 601 kfree(session); 602 return 0; 603 } 604 605 static struct device *hidp_get_device(struct hidp_session *session) 606 { 607 bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src; 608 bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst; 609 struct hci_dev *hdev; 610 struct hci_conn *conn; 611 612 hdev = hci_get_route(dst, src); 613 if (!hdev) 614 return NULL; 615 616 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); 617 618 hci_dev_put(hdev); 619 620 return conn ? &conn->dev : NULL; 621 } 622 623 static int hidp_setup_input(struct hidp_session *session, 624 struct hidp_connadd_req *req) 625 { 626 struct input_dev *input = session->input; 627 int i; 628 629 input_set_drvdata(input, session); 630 631 input->name = "Bluetooth HID Boot Protocol Device"; 632 633 input->id.bustype = BUS_BLUETOOTH; 634 input->id.vendor = req->vendor; 635 input->id.product = req->product; 636 input->id.version = req->version; 637 638 if (req->subclass & 0x40) { 639 set_bit(EV_KEY, input->evbit); 640 set_bit(EV_LED, input->evbit); 641 set_bit(EV_REP, input->evbit); 642 643 set_bit(LED_NUML, input->ledbit); 644 set_bit(LED_CAPSL, input->ledbit); 645 set_bit(LED_SCROLLL, input->ledbit); 646 set_bit(LED_COMPOSE, input->ledbit); 647 set_bit(LED_KANA, input->ledbit); 648 649 for (i = 0; i < sizeof(hidp_keycode); i++) 650 set_bit(hidp_keycode[i], input->keybit); 651 clear_bit(0, input->keybit); 652 } 653 654 if (req->subclass & 0x80) { 655 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 656 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 657 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 658 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 659 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 660 BIT_MASK(BTN_EXTRA); 661 input->relbit[0] |= BIT_MASK(REL_WHEEL); 662 } 663 664 input->dev.parent = hidp_get_device(session); 665 666 input->event = hidp_input_event; 667 668 return input_register_device(input); 669 } 670 671 static int hidp_open(struct hid_device *hid) 672 { 673 return 0; 674 } 675 676 static void hidp_close(struct hid_device *hid) 677 { 678 } 679 680 static const struct { 681 __u16 idVendor; 682 __u16 idProduct; 683 unsigned quirks; 684 } hidp_blacklist[] = { 685 /* Apple wireless Mighty Mouse */ 686 { 0x05ac, 0x030c, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL }, 687 688 { } /* Terminating entry */ 689 }; 690 691 static void hidp_setup_quirks(struct hid_device *hid) 692 { 693 unsigned int n; 694 695 for (n = 0; hidp_blacklist[n].idVendor; n++) 696 if (hidp_blacklist[n].idVendor == le16_to_cpu(hid->vendor) && 697 hidp_blacklist[n].idProduct == le16_to_cpu(hid->product)) 698 hid->quirks = hidp_blacklist[n].quirks; 699 } 700 701 static void hidp_setup_hid(struct hidp_session *session, 702 struct hidp_connadd_req *req) 703 { 704 struct hid_device *hid = session->hid; 705 struct hid_report *report; 706 bdaddr_t src, dst; 707 708 baswap(&src, &bt_sk(session->ctrl_sock->sk)->src); 709 baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst); 710 711 hid->driver_data = session; 712 713 hid->country = req->country; 714 715 hid->bus = BUS_BLUETOOTH; 716 hid->vendor = req->vendor; 717 hid->product = req->product; 718 hid->version = req->version; 719 720 strncpy(hid->name, req->name, 128); 721 strncpy(hid->phys, batostr(&src), 64); 722 strncpy(hid->uniq, batostr(&dst), 64); 723 724 hid->dev = hidp_get_device(session); 725 726 hid->hid_open = hidp_open; 727 hid->hid_close = hidp_close; 728 729 hid->hidinput_input_event = hidp_hidinput_event; 730 731 hidp_setup_quirks(hid); 732 733 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) 734 hidp_send_report(session, report); 735 736 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) 737 hidp_send_report(session, report); 738 739 if (hidinput_connect(hid) == 0) 740 hid->claimed |= HID_CLAIMED_INPUT; 741 } 742 743 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock) 744 { 745 struct hidp_session *session, *s; 746 int err; 747 748 BT_DBG(""); 749 750 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) || 751 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst)) 752 return -ENOTUNIQ; 753 754 session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL); 755 if (!session) 756 return -ENOMEM; 757 758 BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size); 759 760 if (req->rd_size > 0) { 761 unsigned char *buf = kmalloc(req->rd_size, GFP_KERNEL); 762 763 if (!buf) { 764 kfree(session); 765 return -ENOMEM; 766 } 767 768 if (copy_from_user(buf, req->rd_data, req->rd_size)) { 769 kfree(buf); 770 kfree(session); 771 return -EFAULT; 772 } 773 774 session->hid = hid_parse_report(buf, req->rd_size); 775 776 kfree(buf); 777 778 if (!session->hid) { 779 kfree(session); 780 return -EINVAL; 781 } 782 } 783 784 if (!session->hid) { 785 session->input = input_allocate_device(); 786 if (!session->input) { 787 kfree(session); 788 return -ENOMEM; 789 } 790 } 791 792 down_write(&hidp_session_sem); 793 794 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst); 795 if (s && s->state == BT_CONNECTED) { 796 err = -EEXIST; 797 goto failed; 798 } 799 800 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst); 801 802 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu); 803 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu); 804 805 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu); 806 807 session->ctrl_sock = ctrl_sock; 808 session->intr_sock = intr_sock; 809 session->state = BT_CONNECTED; 810 811 setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session); 812 813 skb_queue_head_init(&session->ctrl_transmit); 814 skb_queue_head_init(&session->intr_transmit); 815 816 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); 817 session->idle_to = req->idle_to; 818 819 if (session->input) { 820 err = hidp_setup_input(session, req); 821 if (err < 0) 822 goto failed; 823 } 824 825 if (session->hid) 826 hidp_setup_hid(session, req); 827 828 __hidp_link_session(session); 829 830 hidp_set_timer(session); 831 832 err = kernel_thread(hidp_session, session, CLONE_KERNEL); 833 if (err < 0) 834 goto unlink; 835 836 if (session->input) { 837 hidp_send_ctrl_message(session, 838 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0); 839 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE); 840 841 session->leds = 0xff; 842 hidp_input_event(session->input, EV_LED, 0, 0); 843 } 844 845 up_write(&hidp_session_sem); 846 return 0; 847 848 unlink: 849 hidp_del_timer(session); 850 851 __hidp_unlink_session(session); 852 853 if (session->input) { 854 input_unregister_device(session->input); 855 session->input = NULL; /* don't try to free it here */ 856 } 857 858 failed: 859 up_write(&hidp_session_sem); 860 861 if (session->hid) 862 hid_free_device(session->hid); 863 864 input_free_device(session->input); 865 kfree(session); 866 return err; 867 } 868 869 int hidp_del_connection(struct hidp_conndel_req *req) 870 { 871 struct hidp_session *session; 872 int err = 0; 873 874 BT_DBG(""); 875 876 down_read(&hidp_session_sem); 877 878 session = __hidp_get_session(&req->bdaddr); 879 if (session) { 880 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) { 881 hidp_send_ctrl_message(session, 882 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0); 883 } else { 884 /* Flush the transmit queues */ 885 skb_queue_purge(&session->ctrl_transmit); 886 skb_queue_purge(&session->intr_transmit); 887 888 /* Wakeup user-space polling for socket errors */ 889 session->intr_sock->sk->sk_err = EUNATCH; 890 session->ctrl_sock->sk->sk_err = EUNATCH; 891 892 /* Kill session thread */ 893 atomic_inc(&session->terminate); 894 hidp_schedule(session); 895 } 896 } else 897 err = -ENOENT; 898 899 up_read(&hidp_session_sem); 900 return err; 901 } 902 903 int hidp_get_connlist(struct hidp_connlist_req *req) 904 { 905 struct list_head *p; 906 int err = 0, n = 0; 907 908 BT_DBG(""); 909 910 down_read(&hidp_session_sem); 911 912 list_for_each(p, &hidp_session_list) { 913 struct hidp_session *session; 914 struct hidp_conninfo ci; 915 916 session = list_entry(p, struct hidp_session, list); 917 918 __hidp_copy_session(session, &ci); 919 920 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 921 err = -EFAULT; 922 break; 923 } 924 925 if (++n >= req->cnum) 926 break; 927 928 req->ci++; 929 } 930 req->cnum = n; 931 932 up_read(&hidp_session_sem); 933 return err; 934 } 935 936 int hidp_get_conninfo(struct hidp_conninfo *ci) 937 { 938 struct hidp_session *session; 939 int err = 0; 940 941 down_read(&hidp_session_sem); 942 943 session = __hidp_get_session(&ci->bdaddr); 944 if (session) 945 __hidp_copy_session(session, ci); 946 else 947 err = -ENOENT; 948 949 up_read(&hidp_session_sem); 950 return err; 951 } 952 953 static int __init hidp_init(void) 954 { 955 l2cap_load(); 956 957 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 958 959 return hidp_init_sockets(); 960 } 961 962 static void __exit hidp_exit(void) 963 { 964 hidp_cleanup_sockets(); 965 } 966 967 module_init(hidp_init); 968 module_exit(hidp_exit); 969 970 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 971 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 972 MODULE_VERSION(VERSION); 973 MODULE_LICENSE("GPL"); 974 MODULE_ALIAS("bt-proto-6"); 975