bthidev.c revision 1.19.12.1
1 /* $NetBSD: bthidev.c,v 1.19.12.1 2012/02/18 07:34:09 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Iain Hibbert for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: bthidev.c,v 1.19.12.1 2012/02/18 07:34:09 mrg Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/condvar.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/fcntl.h> 42 #include <sys/kernel.h> 43 #include <sys/kthread.h> 44 #include <sys/queue.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/mutex.h> 48 #include <sys/proc.h> 49 #include <sys/socketvar.h> 50 #include <sys/systm.h> 51 52 #include <prop/proplib.h> 53 54 #include <netbt/bluetooth.h> 55 #include <netbt/l2cap.h> 56 57 #include <dev/usb/hid.h> 58 #include <dev/bluetooth/btdev.h> 59 #include <dev/bluetooth/bthid.h> 60 #include <dev/bluetooth/bthidev.h> 61 62 #include "locators.h" 63 64 /***************************************************************************** 65 * 66 * Bluetooth HID device 67 */ 68 69 #define MAX_DESCRIPTOR_LEN 1024 /* sanity check */ 70 71 /* bthidev softc */ 72 struct bthidev_softc { 73 uint16_t sc_state; 74 uint16_t sc_flags; 75 device_t sc_dev; 76 77 bdaddr_t sc_laddr; /* local address */ 78 bdaddr_t sc_raddr; /* remote address */ 79 struct sockopt sc_mode; /* link mode sockopt */ 80 81 uint16_t sc_ctlpsm; /* control PSM */ 82 struct l2cap_channel *sc_ctl; /* control channel */ 83 struct l2cap_channel *sc_ctl_l; /* control listen */ 84 85 uint16_t sc_intpsm; /* interrupt PSM */ 86 struct l2cap_channel *sc_int; /* interrupt channel */ 87 struct l2cap_channel *sc_int_l; /* interrupt listen */ 88 89 MBUFQ_HEAD() sc_inq; /* input queue */ 90 kmutex_t sc_lock; /* input queue lock */ 91 kcondvar_t sc_cv; /* input queue trigger */ 92 lwp_t *sc_lwp; /* input queue processor */ 93 int sc_detach; 94 95 LIST_HEAD(,bthidev) sc_list; /* child list */ 96 97 callout_t sc_reconnect; 98 int sc_attempts; /* connection attempts */ 99 }; 100 101 /* sc_flags */ 102 #define BTHID_RECONNECT (1 << 0) /* reconnect on link loss */ 103 #define BTHID_CONNECTING (1 << 1) /* we are connecting */ 104 105 /* device state */ 106 #define BTHID_CLOSED 0 107 #define BTHID_WAIT_CTL 1 108 #define BTHID_WAIT_INT 2 109 #define BTHID_OPEN 3 110 111 #define BTHID_RETRY_INTERVAL 5 /* seconds between connection attempts */ 112 113 /* bthidev internals */ 114 static void bthidev_timeout(void *); 115 static int bthidev_listen(struct bthidev_softc *); 116 static int bthidev_connect(struct bthidev_softc *); 117 static int bthidev_output(struct bthidev *, uint8_t *, int); 118 static void bthidev_null(struct bthidev *, uint8_t *, int); 119 static void bthidev_process(void *); 120 static void bthidev_process_one(struct bthidev_softc *, struct mbuf *); 121 122 /* autoconf(9) glue */ 123 static int bthidev_match(device_t, cfdata_t, void *); 124 static void bthidev_attach(device_t, device_t, void *); 125 static int bthidev_detach(device_t, int); 126 static int bthidev_print(void *, const char *); 127 128 CFATTACH_DECL_NEW(bthidev, sizeof(struct bthidev_softc), 129 bthidev_match, bthidev_attach, bthidev_detach, NULL); 130 131 /* bluetooth(9) protocol methods for L2CAP */ 132 static void bthidev_connecting(void *); 133 static void bthidev_ctl_connected(void *); 134 static void bthidev_int_connected(void *); 135 static void bthidev_ctl_disconnected(void *, int); 136 static void bthidev_int_disconnected(void *, int); 137 static void *bthidev_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 138 static void *bthidev_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 139 static void bthidev_complete(void *, int); 140 static void bthidev_linkmode(void *, int); 141 static void bthidev_input(void *, struct mbuf *); 142 143 static const struct btproto bthidev_ctl_proto = { 144 bthidev_connecting, 145 bthidev_ctl_connected, 146 bthidev_ctl_disconnected, 147 bthidev_ctl_newconn, 148 bthidev_complete, 149 bthidev_linkmode, 150 bthidev_input, 151 }; 152 153 static const struct btproto bthidev_int_proto = { 154 bthidev_connecting, 155 bthidev_int_connected, 156 bthidev_int_disconnected, 157 bthidev_int_newconn, 158 bthidev_complete, 159 bthidev_linkmode, 160 bthidev_input, 161 }; 162 163 /***************************************************************************** 164 * 165 * bthidev autoconf(9) routines 166 */ 167 168 static int 169 bthidev_match(device_t self, cfdata_t cfdata, void *aux) 170 { 171 prop_dictionary_t dict = aux; 172 prop_object_t obj; 173 174 obj = prop_dictionary_get(dict, BTDEVservice); 175 if (prop_string_equals_cstring(obj, "HID")) 176 return 1; 177 178 return 0; 179 } 180 181 static void 182 bthidev_attach(device_t parent, device_t self, void *aux) 183 { 184 struct bthidev_softc *sc = device_private(self); 185 prop_dictionary_t dict = aux; 186 prop_object_t obj; 187 device_t dev; 188 struct bthidev_attach_args bha; 189 struct bthidev *hidev; 190 struct hid_data *d; 191 struct hid_item h; 192 const void *desc; 193 int locs[BTHIDBUSCF_NLOCS]; 194 int maxid, rep, dlen; 195 int vendor, product; 196 197 /* 198 * Init softc 199 */ 200 sc->sc_dev = self; 201 LIST_INIT(&sc->sc_list); 202 MBUFQ_INIT(&sc->sc_inq); 203 callout_init(&sc->sc_reconnect, 0); 204 callout_setfunc(&sc->sc_reconnect, bthidev_timeout, sc); 205 sc->sc_state = BTHID_CLOSED; 206 sc->sc_flags = BTHID_CONNECTING; 207 sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL; 208 sc->sc_intpsm = L2CAP_PSM_HID_INTR; 209 210 sockopt_init(&sc->sc_mode, BTPROTO_L2CAP, SO_L2CAP_LM, 0); 211 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 212 cv_init(&sc->sc_cv, device_xname(self)); 213 214 /* 215 * extract config from proplist 216 */ 217 obj = prop_dictionary_get(dict, BTDEVladdr); 218 bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); 219 220 obj = prop_dictionary_get(dict, BTDEVraddr); 221 bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); 222 223 obj = prop_dictionary_get(dict, BTDEVvendor); 224 vendor = (int)prop_number_integer_value(obj); 225 226 obj = prop_dictionary_get(dict, BTDEVproduct); 227 product = (int)prop_number_integer_value(obj); 228 229 obj = prop_dictionary_get(dict, BTDEVmode); 230 if (prop_object_type(obj) == PROP_TYPE_STRING) { 231 if (prop_string_equals_cstring(obj, BTDEVauth)) 232 sockopt_setint(&sc->sc_mode, L2CAP_LM_AUTH); 233 else if (prop_string_equals_cstring(obj, BTDEVencrypt)) 234 sockopt_setint(&sc->sc_mode, L2CAP_LM_ENCRYPT); 235 else if (prop_string_equals_cstring(obj, BTDEVsecure)) 236 sockopt_setint(&sc->sc_mode, L2CAP_LM_SECURE); 237 else { 238 aprint_error(" unknown %s\n", BTDEVmode); 239 return; 240 } 241 242 aprint_verbose(" %s %s", BTDEVmode, 243 prop_string_cstring_nocopy(obj)); 244 } 245 246 obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm); 247 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 248 sc->sc_ctlpsm = prop_number_integer_value(obj); 249 if (L2CAP_PSM_INVALID(sc->sc_ctlpsm)) { 250 aprint_error(" invalid %s\n", BTHIDEVcontrolpsm); 251 return; 252 } 253 } 254 255 obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm); 256 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 257 sc->sc_intpsm = prop_number_integer_value(obj); 258 if (L2CAP_PSM_INVALID(sc->sc_intpsm)) { 259 aprint_error(" invalid %s\n", BTHIDEVinterruptpsm); 260 return; 261 } 262 } 263 264 obj = prop_dictionary_get(dict, BTHIDEVdescriptor); 265 if (prop_object_type(obj) == PROP_TYPE_DATA) { 266 dlen = prop_data_size(obj); 267 desc = prop_data_data_nocopy(obj); 268 } else { 269 aprint_error(" no %s\n", BTHIDEVdescriptor); 270 return; 271 } 272 273 obj = prop_dictionary_get(dict, BTHIDEVreconnect); 274 if (prop_object_type(obj) == PROP_TYPE_BOOL 275 && !prop_bool_true(obj)) 276 sc->sc_flags |= BTHID_RECONNECT; 277 278 /* 279 * Parse the descriptor and attach child devices, one per report. 280 */ 281 maxid = -1; 282 h.report_ID = 0; 283 d = hid_start_parse(desc, dlen, hid_none); 284 while (hid_get_item(d, &h)) { 285 if (h.report_ID > maxid) 286 maxid = h.report_ID; 287 } 288 hid_end_parse(d); 289 290 if (maxid < 0) { 291 aprint_error(" no reports found\n"); 292 return; 293 } 294 295 aprint_normal("\n"); 296 297 if (kthread_create(PRI_NONE, KTHREAD_MUSTJOIN, NULL, bthidev_process, 298 sc, &sc->sc_lwp, "%s", device_xname(self)) != 0) { 299 aprint_error_dev(self, "failed to create input thread\n"); 300 return; 301 } 302 303 for (rep = 0 ; rep <= maxid ; rep++) { 304 if (hid_report_size(desc, dlen, hid_feature, rep) == 0 305 && hid_report_size(desc, dlen, hid_input, rep) == 0 306 && hid_report_size(desc, dlen, hid_output, rep) == 0) 307 continue; 308 309 bha.ba_vendor = vendor; 310 bha.ba_product = product; 311 bha.ba_desc = desc; 312 bha.ba_dlen = dlen; 313 bha.ba_input = bthidev_null; 314 bha.ba_feature = bthidev_null; 315 bha.ba_output = bthidev_output; 316 bha.ba_id = rep; 317 318 locs[BTHIDBUSCF_REPORTID] = rep; 319 320 dev = config_found_sm_loc(self, "bthidbus", 321 locs, &bha, bthidev_print, config_stdsubmatch); 322 if (dev != NULL) { 323 hidev = device_private(dev); 324 hidev->sc_dev = dev; 325 hidev->sc_parent = self; 326 hidev->sc_id = rep; 327 hidev->sc_input = bha.ba_input; 328 hidev->sc_feature = bha.ba_feature; 329 LIST_INSERT_HEAD(&sc->sc_list, hidev, sc_next); 330 } 331 } 332 333 /* 334 * start bluetooth connections 335 */ 336 mutex_enter(bt_lock); 337 if ((sc->sc_flags & BTHID_RECONNECT) == 0) 338 bthidev_listen(sc); 339 340 if (sc->sc_flags & BTHID_CONNECTING) 341 bthidev_connect(sc); 342 mutex_exit(bt_lock); 343 } 344 345 static int 346 bthidev_detach(device_t self, int flags) 347 { 348 struct bthidev_softc *sc = device_private(self); 349 struct bthidev *hidev; 350 351 mutex_enter(bt_lock); 352 sc->sc_flags = 0; /* disable reconnecting */ 353 354 /* release interrupt listen */ 355 if (sc->sc_int_l != NULL) { 356 l2cap_detach(&sc->sc_int_l); 357 sc->sc_int_l = NULL; 358 } 359 360 /* release control listen */ 361 if (sc->sc_ctl_l != NULL) { 362 l2cap_detach(&sc->sc_ctl_l); 363 sc->sc_ctl_l = NULL; 364 } 365 366 /* close interrupt channel */ 367 if (sc->sc_int != NULL) { 368 l2cap_disconnect(sc->sc_int, 0); 369 l2cap_detach(&sc->sc_int); 370 sc->sc_int = NULL; 371 } 372 373 /* close control channel */ 374 if (sc->sc_ctl != NULL) { 375 l2cap_disconnect(sc->sc_ctl, 0); 376 l2cap_detach(&sc->sc_ctl); 377 sc->sc_ctl = NULL; 378 } 379 380 callout_halt(&sc->sc_reconnect, bt_lock); 381 callout_destroy(&sc->sc_reconnect); 382 383 mutex_exit(bt_lock); 384 385 /* kill off the input processor */ 386 if (sc->sc_lwp != NULL) { 387 mutex_enter(&sc->sc_lock); 388 sc->sc_detach = 1; 389 cv_signal(&sc->sc_cv); 390 mutex_exit(&sc->sc_lock); 391 kthread_join(sc->sc_lwp); 392 sc->sc_lwp = NULL; 393 } 394 395 /* detach children */ 396 while ((hidev = LIST_FIRST(&sc->sc_list)) != NULL) { 397 LIST_REMOVE(hidev, sc_next); 398 config_detach(hidev->sc_dev, flags); 399 } 400 401 MBUFQ_DRAIN(&sc->sc_inq); 402 cv_destroy(&sc->sc_cv); 403 mutex_destroy(&sc->sc_lock); 404 sockopt_destroy(&sc->sc_mode); 405 406 return 0; 407 } 408 409 /* 410 * bthidev config print 411 */ 412 static int 413 bthidev_print(void *aux, const char *pnp) 414 { 415 struct bthidev_attach_args *ba = aux; 416 417 if (pnp != NULL) 418 aprint_normal("%s:", pnp); 419 420 if (ba->ba_id > 0) 421 aprint_normal(" reportid %d", ba->ba_id); 422 423 return UNCONF; 424 } 425 426 /***************************************************************************** 427 * 428 * bluetooth(4) HID attach/detach routines 429 */ 430 431 /* 432 * callouts are scheduled after connections have been lost, in order 433 * to clean up and reconnect. 434 */ 435 static void 436 bthidev_timeout(void *arg) 437 { 438 struct bthidev_softc *sc = arg; 439 440 mutex_enter(bt_lock); 441 callout_ack(&sc->sc_reconnect); 442 443 switch (sc->sc_state) { 444 case BTHID_CLOSED: 445 if (sc->sc_int != NULL) { 446 l2cap_disconnect(sc->sc_int, 0); 447 break; 448 } 449 450 if (sc->sc_ctl != NULL) { 451 l2cap_disconnect(sc->sc_ctl, 0); 452 break; 453 } 454 455 if (sc->sc_flags & BTHID_RECONNECT) { 456 sc->sc_flags |= BTHID_CONNECTING; 457 bthidev_connect(sc); 458 break; 459 } 460 461 break; 462 463 case BTHID_WAIT_CTL: 464 break; 465 466 case BTHID_WAIT_INT: 467 break; 468 469 case BTHID_OPEN: 470 break; 471 472 default: 473 break; 474 } 475 mutex_exit(bt_lock); 476 } 477 478 /* 479 * listen for our device 480 */ 481 static int 482 bthidev_listen(struct bthidev_softc *sc) 483 { 484 struct sockaddr_bt sa; 485 int err; 486 487 memset(&sa, 0, sizeof(sa)); 488 sa.bt_len = sizeof(sa); 489 sa.bt_family = AF_BLUETOOTH; 490 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 491 492 /* 493 * Listen on control PSM 494 */ 495 err = l2cap_attach(&sc->sc_ctl_l, &bthidev_ctl_proto, sc); 496 if (err) 497 return err; 498 499 err = l2cap_setopt(sc->sc_ctl_l, &sc->sc_mode); 500 if (err) 501 return err; 502 503 sa.bt_psm = sc->sc_ctlpsm; 504 err = l2cap_bind(sc->sc_ctl_l, &sa); 505 if (err) 506 return err; 507 508 err = l2cap_listen(sc->sc_ctl_l); 509 if (err) 510 return err; 511 512 /* 513 * Listen on interrupt PSM 514 */ 515 err = l2cap_attach(&sc->sc_int_l, &bthidev_int_proto, sc); 516 if (err) 517 return err; 518 519 err = l2cap_setopt(sc->sc_int_l, &sc->sc_mode); 520 if (err) 521 return err; 522 523 sa.bt_psm = sc->sc_intpsm; 524 err = l2cap_bind(sc->sc_int_l, &sa); 525 if (err) 526 return err; 527 528 err = l2cap_listen(sc->sc_int_l); 529 if (err) 530 return err; 531 532 sc->sc_state = BTHID_WAIT_CTL; 533 return 0; 534 } 535 536 /* 537 * start connecting to our device 538 */ 539 static int 540 bthidev_connect(struct bthidev_softc *sc) 541 { 542 struct sockaddr_bt sa; 543 int err; 544 545 if (sc->sc_attempts++ > 0) 546 aprint_verbose_dev(sc->sc_dev, "connect (#%d)\n", sc->sc_attempts); 547 548 memset(&sa, 0, sizeof(sa)); 549 sa.bt_len = sizeof(sa); 550 sa.bt_family = AF_BLUETOOTH; 551 552 err = l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 553 if (err) { 554 aprint_error_dev(sc->sc_dev, "l2cap_attach failed (%d)\n", err); 555 return err; 556 } 557 558 err = l2cap_setopt(sc->sc_ctl, &sc->sc_mode); 559 if (err) 560 return err; 561 562 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 563 err = l2cap_bind(sc->sc_ctl, &sa); 564 if (err) { 565 aprint_error_dev(sc->sc_dev, "l2cap_bind failed (%d)\n", err); 566 return err; 567 } 568 569 sa.bt_psm = sc->sc_ctlpsm; 570 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 571 err = l2cap_connect(sc->sc_ctl, &sa); 572 if (err) { 573 aprint_error_dev(sc->sc_dev, "l2cap_connect failed (%d)\n", err); 574 return err; 575 } 576 577 sc->sc_state = BTHID_WAIT_CTL; 578 return 0; 579 } 580 581 /* 582 * The LWP which processes input reports, forwarding to child devices. 583 * We are always either processing input reports, holding the lock, or 584 * waiting for a signal on condvar. 585 */ 586 static void 587 bthidev_process(void *arg) 588 { 589 struct bthidev_softc *sc = arg; 590 struct mbuf *m; 591 592 mutex_enter(&sc->sc_lock); 593 while (sc->sc_detach == 0) { 594 MBUFQ_DEQUEUE(&sc->sc_inq, m); 595 if (m == NULL) { 596 cv_wait(&sc->sc_cv, &sc->sc_lock); 597 continue; 598 } 599 600 mutex_exit(&sc->sc_lock); 601 bthidev_process_one(sc, m); 602 m_freem(m); 603 mutex_enter(&sc->sc_lock); 604 } 605 mutex_exit(&sc->sc_lock); 606 kthread_exit(0); 607 } 608 609 static void 610 bthidev_process_one(struct bthidev_softc *sc, struct mbuf *m) 611 { 612 struct bthidev *hidev; 613 uint8_t *data; 614 int len; 615 616 if (sc->sc_state != BTHID_OPEN) 617 return; 618 619 if (m->m_pkthdr.len > m->m_len) 620 aprint_error_dev(sc->sc_dev, "truncating HID report\n"); 621 622 len = m->m_len; 623 data = mtod(m, uint8_t *); 624 625 switch (BTHID_TYPE(data[0])) { 626 case BTHID_DATA: 627 /* 628 * data[0] == type / parameter 629 * data[1] == id 630 * data[2..len] == report 631 */ 632 if (len < 3) 633 break; 634 635 LIST_FOREACH(hidev, &sc->sc_list, sc_next) 636 if (data[1] == hidev->sc_id) 637 break; 638 639 if (hidev == NULL) { 640 aprint_error_dev(sc->sc_dev, 641 "report id %d, len = %d ignored\n", data[1], len - 2); 642 643 break; 644 } 645 646 switch (BTHID_DATA_PARAM(data[0])) { 647 case BTHID_DATA_INPUT: 648 (*hidev->sc_input)(hidev, data + 2, len - 2); 649 break; 650 651 case BTHID_DATA_FEATURE: 652 (*hidev->sc_feature)(hidev, data + 2, len - 2); 653 break; 654 655 default: 656 break; 657 } 658 659 break; 660 661 case BTHID_CONTROL: 662 if (len < 1) 663 break; 664 665 switch (BTHID_DATA_PARAM(data[0])) { 666 case BTHID_CONTROL_UNPLUG: 667 aprint_normal_dev(sc->sc_dev, "unplugged\n"); 668 669 mutex_enter(bt_lock); 670 /* close interrupt channel */ 671 if (sc->sc_int != NULL) { 672 l2cap_disconnect(sc->sc_int, 0); 673 l2cap_detach(&sc->sc_int); 674 sc->sc_int = NULL; 675 } 676 677 /* close control channel */ 678 if (sc->sc_ctl != NULL) { 679 l2cap_disconnect(sc->sc_ctl, 0); 680 l2cap_detach(&sc->sc_ctl); 681 sc->sc_ctl = NULL; 682 } 683 mutex_exit(bt_lock); 684 685 break; 686 687 default: 688 break; 689 } 690 691 break; 692 693 default: 694 break; 695 } 696 } 697 698 /***************************************************************************** 699 * 700 * bluetooth(9) callback methods for L2CAP 701 * 702 * All these are called from Bluetooth Protocol code, in a soft 703 * interrupt context at IPL_SOFTNET. 704 */ 705 706 static void 707 bthidev_connecting(void *arg) 708 { 709 710 /* dont care */ 711 } 712 713 static void 714 bthidev_ctl_connected(void *arg) 715 { 716 struct sockaddr_bt sa; 717 struct bthidev_softc *sc = arg; 718 int err; 719 720 if (sc->sc_state != BTHID_WAIT_CTL) 721 return; 722 723 KASSERT(sc->sc_ctl != NULL); 724 KASSERT(sc->sc_int == NULL); 725 726 if (sc->sc_flags & BTHID_CONNECTING) { 727 /* initiate connect on interrupt PSM */ 728 err = l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 729 if (err) 730 goto fail; 731 732 err = l2cap_setopt(sc->sc_int, &sc->sc_mode); 733 if (err) 734 goto fail; 735 736 memset(&sa, 0, sizeof(sa)); 737 sa.bt_len = sizeof(sa); 738 sa.bt_family = AF_BLUETOOTH; 739 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 740 741 err = l2cap_bind(sc->sc_int, &sa); 742 if (err) 743 goto fail; 744 745 sa.bt_psm = sc->sc_intpsm; 746 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 747 err = l2cap_connect(sc->sc_int, &sa); 748 if (err) 749 goto fail; 750 } 751 752 sc->sc_state = BTHID_WAIT_INT; 753 return; 754 755 fail: 756 l2cap_detach(&sc->sc_ctl); 757 sc->sc_ctl = NULL; 758 759 aprint_error_dev(sc->sc_dev, "connect failed (%d)\n", err); 760 } 761 762 static void 763 bthidev_int_connected(void *arg) 764 { 765 struct bthidev_softc *sc = arg; 766 767 if (sc->sc_state != BTHID_WAIT_INT) 768 return; 769 770 KASSERT(sc->sc_ctl != NULL); 771 KASSERT(sc->sc_int != NULL); 772 773 sc->sc_attempts = 0; 774 sc->sc_flags &= ~BTHID_CONNECTING; 775 sc->sc_state = BTHID_OPEN; 776 777 aprint_normal_dev(sc->sc_dev, "connected\n"); 778 } 779 780 /* 781 * Disconnected 782 * 783 * Depending on our state, this could mean several things, but essentially 784 * we are lost. If both channels are closed, and we are marked to reconnect, 785 * schedule another try otherwise just give up. They will contact us. 786 */ 787 static void 788 bthidev_ctl_disconnected(void *arg, int err) 789 { 790 struct bthidev_softc *sc = arg; 791 792 if (sc->sc_ctl != NULL) { 793 l2cap_detach(&sc->sc_ctl); 794 sc->sc_ctl = NULL; 795 } 796 797 sc->sc_state = BTHID_CLOSED; 798 799 if (sc->sc_int == NULL) { 800 aprint_normal_dev(sc->sc_dev, "disconnected\n"); 801 sc->sc_flags &= ~BTHID_CONNECTING; 802 803 if (sc->sc_flags & BTHID_RECONNECT) 804 callout_schedule(&sc->sc_reconnect, 805 BTHID_RETRY_INTERVAL * hz); 806 else 807 sc->sc_state = BTHID_WAIT_CTL; 808 } else { 809 /* 810 * The interrupt channel should have been closed first, 811 * but its potentially unsafe to detach that from here. 812 * Give them a second to do the right thing or let the 813 * callout handle it. 814 */ 815 callout_schedule(&sc->sc_reconnect, hz); 816 } 817 } 818 819 static void 820 bthidev_int_disconnected(void *arg, int err) 821 { 822 struct bthidev_softc *sc = arg; 823 824 if (sc->sc_int != NULL) { 825 l2cap_detach(&sc->sc_int); 826 sc->sc_int = NULL; 827 } 828 829 sc->sc_state = BTHID_CLOSED; 830 831 if (sc->sc_ctl == NULL) { 832 aprint_normal_dev(sc->sc_dev, "disconnected\n"); 833 sc->sc_flags &= ~BTHID_CONNECTING; 834 835 if (sc->sc_flags & BTHID_RECONNECT) 836 callout_schedule(&sc->sc_reconnect, 837 BTHID_RETRY_INTERVAL * hz); 838 else 839 sc->sc_state = BTHID_WAIT_CTL; 840 } else { 841 /* 842 * The control channel should be closing also, allow 843 * them a chance to do that before we force it. 844 */ 845 callout_schedule(&sc->sc_reconnect, hz); 846 } 847 } 848 849 /* 850 * New Connections 851 * 852 * We give a new L2CAP handle back if this matches the BDADDR we are 853 * listening for and we are in the right state. bthidev_connected will 854 * be called when the connection is open, so nothing else to do here 855 */ 856 static void * 857 bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr, 858 struct sockaddr_bt *raddr) 859 { 860 struct bthidev_softc *sc = arg; 861 862 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) 863 return NULL; 864 865 if ((sc->sc_flags & BTHID_CONNECTING) 866 || sc->sc_state != BTHID_WAIT_CTL 867 || sc->sc_ctl != NULL 868 || sc->sc_int != NULL) { 869 aprint_verbose_dev(sc->sc_dev, "reject ctl newconn %s%s%s%s\n", 870 (sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "", 871 (sc->sc_state == BTHID_WAIT_CTL) ? " (WAITING)": "", 872 (sc->sc_ctl != NULL) ? " (GOT CONTROL)" : "", 873 (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : ""); 874 875 return NULL; 876 } 877 878 l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 879 return sc->sc_ctl; 880 } 881 882 static void * 883 bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr, 884 struct sockaddr_bt *raddr) 885 { 886 struct bthidev_softc *sc = arg; 887 888 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) 889 return NULL; 890 891 if ((sc->sc_flags & BTHID_CONNECTING) 892 || sc->sc_state != BTHID_WAIT_INT 893 || sc->sc_ctl == NULL 894 || sc->sc_int != NULL) { 895 aprint_verbose_dev(sc->sc_dev, "reject int newconn %s%s%s%s\n", 896 (sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "", 897 (sc->sc_state == BTHID_WAIT_INT) ? " (WAITING)": "", 898 (sc->sc_ctl == NULL) ? " (NO CONTROL)" : "", 899 (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : ""); 900 901 return NULL; 902 } 903 904 l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 905 return sc->sc_int; 906 } 907 908 static void 909 bthidev_complete(void *arg, int count) 910 { 911 912 /* dont care */ 913 } 914 915 static void 916 bthidev_linkmode(void *arg, int new) 917 { 918 struct bthidev_softc *sc = arg; 919 int mode; 920 921 (void)sockopt_getint(&sc->sc_mode, &mode); 922 923 if ((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) 924 aprint_error_dev(sc->sc_dev, "auth failed\n"); 925 else if ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) 926 aprint_error_dev(sc->sc_dev, "encrypt off\n"); 927 else if ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)) 928 aprint_error_dev(sc->sc_dev, "insecure\n"); 929 else 930 return; 931 932 if (sc->sc_int != NULL) 933 l2cap_disconnect(sc->sc_int, 0); 934 935 if (sc->sc_ctl != NULL) 936 l2cap_disconnect(sc->sc_ctl, 0); 937 } 938 939 /* 940 * Receive reports from the protocol stack. Because this will be called 941 * with bt_lock held, we queue the mbuf and process it with a kernel thread 942 */ 943 static void 944 bthidev_input(void *arg, struct mbuf *m) 945 { 946 struct bthidev_softc *sc = arg; 947 948 if (sc->sc_state != BTHID_OPEN) { 949 m_freem(m); 950 return; 951 } 952 953 mutex_enter(&sc->sc_lock); 954 MBUFQ_ENQUEUE(&sc->sc_inq, m); 955 cv_signal(&sc->sc_cv); 956 mutex_exit(&sc->sc_lock); 957 } 958 959 /***************************************************************************** 960 * 961 * IO routines 962 */ 963 964 static void 965 bthidev_null(struct bthidev *hidev, uint8_t *report, int len) 966 { 967 968 /* 969 * empty routine just in case the device 970 * provided no method to handle this report 971 */ 972 } 973 974 static int 975 bthidev_output(struct bthidev *hidev, uint8_t *report, int rlen) 976 { 977 struct bthidev_softc *sc = device_private(hidev->sc_parent); 978 struct mbuf *m; 979 int err; 980 981 if (sc == NULL || sc->sc_state != BTHID_OPEN) 982 return ENOTCONN; 983 984 KASSERT(sc->sc_ctl != NULL); 985 KASSERT(sc->sc_int != NULL); 986 987 if (rlen == 0 || report == NULL) 988 return 0; 989 990 if (rlen > MHLEN - 2) { 991 aprint_error_dev(sc->sc_dev, 992 "output report too long (%d)!\n", rlen); 993 return EMSGSIZE; 994 } 995 996 m = m_gethdr(M_DONTWAIT, MT_DATA); 997 if (m == NULL) 998 return ENOMEM; 999 1000 /* 1001 * data[0] = type / parameter 1002 * data[1] = id 1003 * data[2..N] = report 1004 */ 1005 mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT); 1006 mtod(m, uint8_t *)[1] = hidev->sc_id; 1007 memcpy(mtod(m, uint8_t *) + 2, report, rlen); 1008 m->m_pkthdr.len = m->m_len = rlen + 2; 1009 1010 mutex_enter(bt_lock); 1011 err = l2cap_send(sc->sc_int, m); 1012 mutex_exit(bt_lock); 1013 1014 return err; 1015 } 1016
Indexes created Wed Oct 01 18:09:54 GMT 2025