bthidev.c revision 1.3
1 /* $NetBSD: bthidev.c,v 1.3 2006/09/10 15:45:56 plunky 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 1.3 2006/09/10 15:45:56 plunky Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/kernel.h> 42 #include <sys/queue.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/proc.h> 46 #include <sys/systm.h> 47 48 #include <prop/proplib.h> 49 50 #include <netbt/bluetooth.h> 51 #include <netbt/l2cap.h> 52 53 #include <dev/usb/hid.h> 54 #include <dev/bluetooth/btdev.h> 55 #include <dev/bluetooth/bthid.h> 56 #include <dev/bluetooth/bthidev.h> 57 58 #include "locators.h" 59 60 /***************************************************************************** 61 * 62 * Bluetooth HID device 63 */ 64 65 #define MAX_DESCRIPTOR_LEN 1024 /* sanity check */ 66 67 /* bthidev softc */ 68 struct bthidev_softc { 69 struct btdev sc_btdev; 70 uint16_t sc_state; 71 uint16_t sc_flags; 72 73 bdaddr_t sc_laddr; /* local address */ 74 bdaddr_t sc_raddr; /* remote address */ 75 76 uint16_t sc_ctlpsm; /* control PSM */ 77 struct l2cap_channel *sc_ctl; /* control channel */ 78 struct l2cap_channel *sc_ctl_l; /* control listen */ 79 80 uint16_t sc_intpsm; /* interrupt PSM */ 81 struct l2cap_channel *sc_int; /* interrupt channel */ 82 struct l2cap_channel *sc_int_l; /* interrupt listen */ 83 84 LIST_HEAD(,bthidev) sc_list; /* child list */ 85 86 struct callout sc_reconnect; 87 int sc_attempts; /* connection attempts */ 88 }; 89 90 /* sc_flags */ 91 #define BTHID_RECONNECT (1 << 0) /* reconnect on link loss */ 92 #define BTHID_CONNECTING (1 << 1) /* we are connecting */ 93 94 /* device state */ 95 #define BTHID_CLOSED 0 96 #define BTHID_WAIT_CTL 1 97 #define BTHID_WAIT_INT 2 98 #define BTHID_OPEN 3 99 #define BTHID_DETACHING 4 100 101 #define BTHID_RETRY_INTERVAL 5 /* seconds between connection attempts */ 102 103 /* bthidev internals */ 104 static void bthidev_timeout(void *); 105 static int bthidev_listen(struct bthidev_softc *); 106 static int bthidev_connect(struct bthidev_softc *); 107 static int bthidev_output(struct bthidev *, uint8_t *, int); 108 static void bthidev_null(struct bthidev *, uint8_t *, int); 109 110 /* autoconf(9) glue */ 111 static int bthidev_match(struct device *, struct cfdata *, void *); 112 static void bthidev_attach(struct device *, struct device *, void *); 113 static int bthidev_detach(struct device *, int); 114 static int bthidev_print(void *, const char *); 115 116 CFATTACH_DECL(bthidev, sizeof(struct bthidev_softc), 117 bthidev_match, bthidev_attach, bthidev_detach, NULL); 118 119 /* btdev identity matcher */ 120 static int bthidev_identify(struct btdev *, prop_dictionary_t); 121 122 /* bluetooth(9) protocol methods for L2CAP */ 123 static void bthidev_connecting(void *); 124 static void bthidev_ctl_connected(void *); 125 static void bthidev_int_connected(void *); 126 static void bthidev_ctl_disconnected(void *, int); 127 static void bthidev_int_disconnected(void *, int); 128 static void *bthidev_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 129 static void *bthidev_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 130 static void bthidev_complete(void *, int); 131 static void bthidev_input(void *, struct mbuf *); 132 133 static const struct btproto bthidev_ctl_proto = { 134 bthidev_connecting, 135 bthidev_ctl_connected, 136 bthidev_ctl_disconnected, 137 bthidev_ctl_newconn, 138 bthidev_complete, 139 bthidev_input, 140 }; 141 142 static const struct btproto bthidev_int_proto = { 143 bthidev_connecting, 144 bthidev_int_connected, 145 bthidev_int_disconnected, 146 bthidev_int_newconn, 147 bthidev_complete, 148 bthidev_input, 149 }; 150 151 /***************************************************************************** 152 * 153 * bthidev autoconf(9) routines 154 */ 155 156 static int 157 bthidev_match(struct device *self, struct cfdata *cfdata, void *aux) 158 { 159 prop_dictionary_t dict = aux; 160 prop_object_t obj; 161 162 obj = prop_dictionary_get(dict, BTDEVtype); 163 return prop_string_equals_cstring(obj, "bthidev"); 164 } 165 166 static void 167 bthidev_attach(struct device *parent, struct device *self, void *aux) 168 { 169 struct bthidev_softc *sc = (struct bthidev_softc *)self; 170 prop_dictionary_t dict = aux; 171 prop_object_t obj; 172 struct bthidev_attach_args bha; 173 struct bthidev *dev; 174 struct hid_data *d; 175 struct hid_item h; 176 const void *desc; 177 int locs[BTHIDBUSCF_NLOCS]; 178 int maxid, rep, s, dlen; 179 180 /* 181 * Init softc 182 */ 183 LIST_INIT(&sc->sc_list); 184 callout_init(&sc->sc_reconnect); 185 callout_setfunc(&sc->sc_reconnect, bthidev_timeout, sc); 186 sc->sc_state = BTHID_CLOSED; 187 sc->sc_flags = BTHID_CONNECTING; 188 sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL; 189 sc->sc_intpsm = L2CAP_PSM_HID_INTR; 190 191 sc->sc_btdev.sc_identify = bthidev_identify; 192 193 /* 194 * extract config from proplist 195 */ 196 obj = prop_dictionary_get(dict, BTDEVladdr); 197 bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); 198 199 obj = prop_dictionary_get(dict, BTDEVraddr); 200 bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); 201 202 obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm); 203 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 204 sc->sc_ctlpsm = prop_number_integer_value(obj); 205 if (L2CAP_PSM_INVALID(sc->sc_ctlpsm)) { 206 aprint_error(" invalid %s\n", BTHIDEVcontrolpsm); 207 return; 208 } 209 } 210 211 obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm); 212 if (prop_object_type(obj) == PROP_TYPE_NUMBER) { 213 sc->sc_intpsm = prop_number_integer_value(obj); 214 if (L2CAP_PSM_INVALID(sc->sc_intpsm)) { 215 aprint_error(" invalid %s\n", BTHIDEVinterruptpsm); 216 return; 217 } 218 } 219 220 obj = prop_dictionary_get(dict, BTHIDEVdescriptor); 221 if (prop_object_type(obj) == PROP_TYPE_DATA) { 222 dlen = prop_data_size(obj); 223 desc = prop_data_data_nocopy(obj); 224 } else { 225 aprint_error(" no %s\n", BTHIDEVdescriptor); 226 return; 227 } 228 229 obj = prop_dictionary_get(dict, BTHIDEVreconnect); 230 if (prop_object_type(obj) == PROP_TYPE_BOOL 231 && !prop_bool_true(obj)) 232 sc->sc_flags |= BTHID_RECONNECT; 233 234 /* 235 * Parse the descriptor and attach child devices, one per report. 236 */ 237 maxid = -1; 238 h.report_ID = 0; 239 d = hid_start_parse(desc, dlen, hid_none); 240 while (hid_get_item(d, &h)) { 241 if (h.report_ID > maxid) 242 maxid = h.report_ID; 243 } 244 hid_end_parse(d); 245 246 if (maxid < 0) { 247 aprint_error(" no reports found\n"); 248 return; 249 } 250 251 aprint_normal("\n"); 252 253 for (rep = 0 ; rep <= maxid ; rep++) { 254 if (hid_report_size(desc, dlen, hid_feature, rep) == 0 255 && hid_report_size(desc, dlen, hid_input, rep) == 0 256 && hid_report_size(desc, dlen, hid_output, rep) == 0) 257 continue; 258 259 bha.ba_desc = desc; 260 bha.ba_dlen = dlen; 261 bha.ba_input = bthidev_null; 262 bha.ba_feature = bthidev_null; 263 bha.ba_output = bthidev_output; 264 bha.ba_id = rep; 265 266 locs[BTHIDBUSCF_REPORTID] = rep; 267 268 dev = (struct bthidev *)config_found_sm_loc((struct device *)sc, "bthidbus", 269 locs, &bha, bthidev_print, config_stdsubmatch); 270 if (dev != NULL) { 271 dev->sc_parent = (struct device *)sc; 272 dev->sc_id = rep; 273 dev->sc_input = bha.ba_input; 274 dev->sc_feature = bha.ba_feature; 275 LIST_INSERT_HEAD(&sc->sc_list, dev, sc_next); 276 } 277 } 278 279 /* 280 * start bluetooth connections 281 */ 282 s = splsoftnet(); 283 if ((sc->sc_flags & BTHID_RECONNECT) == 0) 284 bthidev_listen(sc); 285 286 if (sc->sc_flags & BTHID_CONNECTING) 287 bthidev_connect(sc); 288 splx(s); 289 } 290 291 static int 292 bthidev_detach(struct device *self, int flags) 293 { 294 struct bthidev_softc *sc = (struct bthidev_softc *)self; 295 struct bthidev *dev; 296 int s; 297 298 s = splsoftnet(); 299 sc->sc_flags = 0; /* disable reconnecting */ 300 301 /* release interrupt listen */ 302 if (sc->sc_int_l != NULL) { 303 l2cap_detach(&sc->sc_int_l); 304 sc->sc_int_l = NULL; 305 } 306 307 /* release control listen */ 308 if (sc->sc_ctl_l != NULL) { 309 l2cap_detach(&sc->sc_ctl_l); 310 sc->sc_ctl_l = NULL; 311 } 312 313 /* close interrupt channel */ 314 if (sc->sc_int != NULL) { 315 l2cap_disconnect(sc->sc_int, 0); 316 l2cap_detach(&sc->sc_int); 317 sc->sc_int = NULL; 318 } 319 320 /* close control channel */ 321 if (sc->sc_ctl != NULL) { 322 l2cap_disconnect(sc->sc_ctl, 0); 323 l2cap_detach(&sc->sc_ctl); 324 sc->sc_ctl = NULL; 325 } 326 327 /* remove callout */ 328 sc->sc_state = BTHID_DETACHING; 329 callout_stop(&sc->sc_reconnect); 330 if (callout_invoking(&sc->sc_reconnect)) 331 tsleep(sc, PWAIT, "bthidetach", 0); 332 333 splx(s); 334 335 /* detach children */ 336 while ((dev = LIST_FIRST(&sc->sc_list)) != NULL) { 337 LIST_REMOVE(dev, sc_next); 338 config_detach((struct device *)dev, flags); 339 } 340 341 return 0; 342 } 343 344 /* 345 * bthidev config print 346 */ 347 static int 348 bthidev_print(void *aux, const char *pnp) 349 { 350 struct bthidev_attach_args *ba = aux; 351 352 if (pnp != NULL) 353 aprint_normal("%s:", pnp); 354 355 if (ba->ba_id > 0) 356 aprint_normal(" reportid %d", ba->ba_id); 357 358 return UNCONF; 359 } 360 361 /* 362 * btdev identity matcher 363 */ 364 static int 365 bthidev_identify(struct btdev *dev, prop_dictionary_t dict) 366 { 367 struct bthidev_softc *sc = (struct bthidev_softc *)dev; 368 prop_object_t obj; 369 370 obj = prop_dictionary_get(dict, BTDEVtype); 371 if (!prop_string_equals_cstring(obj, "bthidev")) 372 return 0; 373 374 obj = prop_dictionary_get(dict, BTDEVladdr); 375 if (!prop_data_equals_data(obj, &sc->sc_laddr, sizeof(bdaddr_t))) 376 return 0; 377 378 obj = prop_dictionary_get(dict, BTDEVraddr); 379 if (!prop_data_equals_data(obj, &sc->sc_raddr, sizeof(bdaddr_t))) 380 return 0; 381 382 obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm); 383 if (!prop_number_equals_integer(obj, sc->sc_ctlpsm)) 384 return 0; 385 386 obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm); 387 if (!prop_number_equals_integer(obj, sc->sc_intpsm)) 388 return 0; 389 390 return 1; 391 } 392 393 /***************************************************************************** 394 * 395 * bluetooth(4) HID attach/detach routines 396 */ 397 398 /* 399 * callouts are scheduled to initiate outgoing connections 400 * after the connection has been lost. 401 */ 402 static void 403 bthidev_timeout(void *arg) 404 { 405 struct bthidev_softc *sc = arg; 406 int s, err; 407 408 s = splsoftnet(); 409 callout_ack(&sc->sc_reconnect); 410 411 switch (sc->sc_state) { 412 case BTHID_CLOSED: 413 sc->sc_flags |= BTHID_CONNECTING; 414 err = bthidev_connect(sc); 415 if (err) 416 printf("%s: connect failed (%d)\n", 417 device_xname((struct device *)sc), err); 418 break; 419 420 case BTHID_WAIT_CTL: 421 break; 422 423 case BTHID_WAIT_INT: 424 break; 425 426 case BTHID_OPEN: 427 break; 428 429 case BTHID_DETACHING: 430 wakeup(sc); 431 break; 432 433 default: 434 break; 435 } 436 splx(s); 437 } 438 439 /* 440 * listen for our device 441 */ 442 static int 443 bthidev_listen(struct bthidev_softc *sc) 444 { 445 struct sockaddr_bt sa; 446 int err; 447 448 memset(&sa, 0, sizeof(sa)); 449 sa.bt_len = sizeof(sa); 450 sa.bt_family = AF_BLUETOOTH; 451 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 452 453 /* 454 * Listen on control PSM 455 */ 456 err = l2cap_attach(&sc->sc_ctl_l, &bthidev_ctl_proto, sc); 457 if (err) 458 return err; 459 460 sa.bt_psm = sc->sc_ctlpsm; 461 err = l2cap_bind(sc->sc_ctl_l, &sa); 462 if (err) 463 return err; 464 465 err = l2cap_listen(sc->sc_ctl_l); 466 if (err) 467 return err; 468 469 /* 470 * Listen on interrupt PSM 471 */ 472 err = l2cap_attach(&sc->sc_int_l, &bthidev_int_proto, sc); 473 if (err) 474 return err; 475 476 sa.bt_psm = sc->sc_intpsm; 477 err = l2cap_bind(sc->sc_int_l, &sa); 478 if (err) 479 return err; 480 481 err = l2cap_listen(sc->sc_int_l); 482 if (err) 483 return err; 484 485 sc->sc_state = BTHID_WAIT_CTL; 486 return 0; 487 } 488 489 /* 490 * start connecting to our device 491 */ 492 static int 493 bthidev_connect(struct bthidev_softc *sc) 494 { 495 struct sockaddr_bt sa; 496 int err; 497 498 if (sc->sc_attempts++ > 0) 499 printf("%s: connect (#%d)\n", 500 device_xname((struct device *)sc), sc->sc_attempts); 501 502 memset(&sa, 0, sizeof(sa)); 503 sa.bt_len = sizeof(sa); 504 sa.bt_family = AF_BLUETOOTH; 505 506 err = l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 507 if (err) { 508 printf("%s: l2cap_attach failed (%d)\n", 509 device_xname((struct device *)sc), err); 510 return err; 511 } 512 513 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 514 err = l2cap_bind(sc->sc_ctl, &sa); 515 if (err) { 516 printf("%s: l2cap_bind failed (%d)\n", 517 device_xname((struct device *)sc), err); 518 return err; 519 } 520 521 sa.bt_psm = sc->sc_ctlpsm; 522 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 523 err = l2cap_connect(sc->sc_ctl, &sa); 524 if (err) { 525 printf("%s: l2cap_connect failed (%d)\n", 526 device_xname((struct device *)sc), err); 527 return err; 528 } 529 530 sc->sc_state = BTHID_WAIT_CTL; 531 return 0; 532 } 533 534 /***************************************************************************** 535 * 536 * bluetooth(9) callback methods for L2CAP 537 * 538 * All these are called from Bluetooth Protocol code, in a soft 539 * interrupt context at IPL_SOFTNET. 540 */ 541 542 static void 543 bthidev_connecting(void *arg) 544 { 545 546 /* dont care */ 547 } 548 549 static void 550 bthidev_ctl_connected(void *arg) 551 { 552 struct sockaddr_bt sa; 553 struct bthidev_softc *sc = arg; 554 int err; 555 556 if (sc->sc_state != BTHID_WAIT_CTL) 557 return; 558 559 KASSERT(sc->sc_ctl != NULL); 560 KASSERT(sc->sc_int == NULL); 561 562 if (sc->sc_flags & BTHID_CONNECTING) { 563 /* initiate connect on interrupt PSM */ 564 err = l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 565 if (err) 566 goto fail; 567 568 memset(&sa, 0, sizeof(sa)); 569 sa.bt_len = sizeof(sa); 570 sa.bt_family = AF_BLUETOOTH; 571 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 572 573 err = l2cap_bind(sc->sc_int, &sa); 574 if (err) 575 goto fail; 576 577 sa.bt_psm = sc->sc_intpsm; 578 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 579 err = l2cap_connect(sc->sc_int, &sa); 580 if (err) 581 goto fail; 582 } 583 584 sc->sc_state = BTHID_WAIT_INT; 585 return; 586 587 fail: 588 l2cap_detach(&sc->sc_ctl); 589 sc->sc_ctl = NULL; 590 591 printf("%s: connect failed (%d)\n", 592 device_xname((struct device *)sc), err); 593 } 594 595 static void 596 bthidev_int_connected(void *arg) 597 { 598 struct bthidev_softc *sc = arg; 599 600 if (sc->sc_state != BTHID_WAIT_INT) 601 return; 602 603 KASSERT(sc->sc_ctl != NULL); 604 KASSERT(sc->sc_int != NULL); 605 606 sc->sc_attempts = 0; 607 sc->sc_flags &= ~BTHID_CONNECTING; 608 sc->sc_state = BTHID_OPEN; 609 610 printf("%s: connected\n", device_xname((struct device *)sc)); 611 } 612 613 /* 614 * Disconnected 615 * 616 * Depending on our state, this could mean several things, but essentially 617 * we are lost. If both channels are closed, and we are marked to reconnect, 618 * schedule another try otherwise just give up. They will contact us. 619 */ 620 static void 621 bthidev_ctl_disconnected(void *arg, int err) 622 { 623 struct bthidev_softc *sc = arg; 624 625 if (sc->sc_ctl != NULL) { 626 l2cap_detach(&sc->sc_ctl); 627 sc->sc_ctl = NULL; 628 } 629 630 sc->sc_state = BTHID_CLOSED; 631 632 if (sc->sc_int == NULL) { 633 printf("%s: disconnected\n", 634 device_xname((struct device *)sc)); 635 sc->sc_flags &= ~BTHID_CONNECTING; 636 637 if (sc->sc_flags & BTHID_RECONNECT) 638 callout_schedule(&sc->sc_reconnect, 639 BTHID_RETRY_INTERVAL * hz); 640 else 641 sc->sc_state = BTHID_WAIT_CTL; 642 } else { 643 /* 644 * The interrupt channel should have been closed first, 645 * so if its still up then kick it along.. 646 */ 647 l2cap_disconnect(sc->sc_int, 0); 648 } 649 } 650 651 static void 652 bthidev_int_disconnected(void *arg, int err) 653 { 654 struct bthidev_softc *sc = arg; 655 656 if (sc->sc_int != NULL) { 657 l2cap_detach(&sc->sc_int); 658 sc->sc_int = NULL; 659 } 660 661 sc->sc_state = BTHID_CLOSED; 662 663 if (sc->sc_ctl == NULL) { 664 printf("%s: disconnected\n", 665 device_xname((struct device *)sc)); 666 sc->sc_flags &= ~BTHID_CONNECTING; 667 668 if (sc->sc_flags & BTHID_RECONNECT) 669 callout_schedule(&sc->sc_reconnect, 670 BTHID_RETRY_INTERVAL * hz); 671 else 672 sc->sc_state = BTHID_WAIT_CTL; 673 } 674 } 675 676 /* 677 * New Connections 678 * 679 * We give a new L2CAP handle back if this matches the BDADDR we are 680 * listening for and we are in the right state. bthidev_connected will 681 * be called when the connection is open, so nothing else to do here 682 */ 683 static void * 684 bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr, struct sockaddr_bt *raddr) 685 { 686 struct bthidev_softc *sc = arg; 687 688 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 689 || (sc->sc_flags & BTHID_CONNECTING) 690 || sc->sc_state != BTHID_WAIT_CTL 691 || sc->sc_ctl != NULL 692 || sc->sc_int != NULL) 693 return NULL; 694 695 l2cap_attach(&sc->sc_ctl, &bthidev_ctl_proto, sc); 696 return sc->sc_ctl; 697 } 698 699 static void * 700 bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr, struct sockaddr_bt *raddr) 701 { 702 struct bthidev_softc *sc = arg; 703 704 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 705 || (sc->sc_flags & BTHID_CONNECTING) 706 || sc->sc_state != BTHID_WAIT_INT 707 || sc->sc_ctl == NULL 708 || sc->sc_int != NULL) 709 return NULL; 710 711 l2cap_attach(&sc->sc_int, &bthidev_int_proto, sc); 712 return sc->sc_int; 713 } 714 715 static void 716 bthidev_complete(void *arg, int count) 717 { 718 719 /* dont care */ 720 } 721 722 /* 723 * Receive reports from the protocol stack. 724 */ 725 static void 726 bthidev_input(void *arg, struct mbuf *m) 727 { 728 struct bthidev_softc *sc = arg; 729 struct bthidev *dev; 730 uint8_t *data; 731 int len; 732 733 if (sc->sc_state != BTHID_OPEN) 734 goto release; 735 736 if (m->m_pkthdr.len > m->m_len) 737 printf("%s: truncating HID report\n", 738 device_xname((struct device *)sc)); 739 740 len = m->m_len; 741 data = mtod(m, uint8_t *); 742 743 if (BTHID_TYPE(data[0]) == BTHID_DATA) { 744 /* 745 * data[0] == type / parameter 746 * data[1] == id 747 * data[2..len] == report 748 */ 749 if (len < 3) 750 goto release; 751 752 LIST_FOREACH(dev, &sc->sc_list, sc_next) { 753 if (data[1] == dev->sc_id) { 754 switch (BTHID_DATA_PARAM(data[0])) { 755 case BTHID_DATA_INPUT: 756 (*dev->sc_input)(dev, data + 2, len - 2); 757 break; 758 759 case BTHID_DATA_FEATURE: 760 (*dev->sc_feature)(dev, data + 2, len - 2); 761 break; 762 763 default: 764 break; 765 } 766 767 goto release; 768 } 769 } 770 printf("%s: report id %d, len = %d ignored\n", 771 device_xname((struct device *)sc), data[1], len - 2); 772 773 goto release; 774 } 775 776 if (BTHID_TYPE(data[0]) == BTHID_CONTROL) { 777 if (len < 1) 778 goto release; 779 780 if (BTHID_DATA_PARAM(data[0]) == BTHID_CONTROL_UNPLUG) { 781 printf("%s: unplugged\n", 782 device_xname((struct device *)sc)); 783 784 /* close interrupt channel */ 785 if (sc->sc_int != NULL) { 786 l2cap_disconnect(sc->sc_int, 0); 787 l2cap_detach(&sc->sc_int); 788 sc->sc_int = NULL; 789 } 790 791 /* close control channel */ 792 if (sc->sc_ctl != NULL) { 793 l2cap_disconnect(sc->sc_ctl, 0); 794 l2cap_detach(&sc->sc_ctl); 795 sc->sc_ctl = NULL; 796 } 797 } 798 799 goto release; 800 } 801 802 release: 803 m_freem(m); 804 } 805 806 /***************************************************************************** 807 * 808 * IO routines 809 */ 810 811 static void 812 bthidev_null(struct bthidev *dev, uint8_t *report, int len) 813 { 814 815 /* 816 * empty routine just in case the device 817 * provided no method to handle this report 818 */ 819 } 820 821 static int 822 bthidev_output(struct bthidev *dev, uint8_t *report, int rlen) 823 { 824 struct bthidev_softc *sc = (struct bthidev_softc *)dev->sc_parent; 825 struct mbuf *m; 826 int s, err; 827 828 if (sc == NULL || sc->sc_state != BTHID_OPEN) 829 return ENOTCONN; 830 831 KASSERT(sc->sc_ctl != NULL); 832 KASSERT(sc->sc_int != NULL); 833 834 if (rlen == 0 || report == NULL) 835 return 0; 836 837 if (rlen > MHLEN - 2) { 838 printf("%s: output report too long (%d)!\n", 839 device_xname((struct device *)sc), rlen); 840 841 return EMSGSIZE; 842 } 843 844 m = m_gethdr(M_DONTWAIT, MT_DATA); 845 if (m == NULL) 846 return ENOMEM; 847 848 /* 849 * data[0] = type / parameter 850 * data[1] = id 851 * data[2..N] = report 852 */ 853 mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT); 854 mtod(m, uint8_t *)[1] = dev->sc_id; 855 memcpy(mtod(m, uint8_t *) + 2, report, rlen); 856 m->m_pkthdr.len = m->m_len = rlen + 2; 857 858 s = splsoftnet(); 859 err = l2cap_send(sc->sc_int, m); 860 splx(s); 861 862 return err; 863 } 864
Indexes created Wed Oct 01 18:09:54 GMT 2025