| 1 | /* $NetBSD: bthidev.c,v 1.29 2014/08/05 07:55:31 rtr 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 1.29 2014/08/05 07:55:31 rtr 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 | int err; |
| 197 | |
| 198 | /* |
| 199 | * Init softc |
| 200 | */ |
| 201 | sc->sc_dev = self; |
| 202 | LIST_INIT(&sc->sc_list); |
| 203 | MBUFQ_INIT(&sc->sc_inq); |
| 204 | callout_init(&sc->sc_reconnect, 0); |
| 205 | callout_setfunc(&sc->sc_reconnect, bthidev_timeout, sc); |
| 206 | sc->sc_state = BTHID_CLOSED; |
| 207 | sc->sc_flags = BTHID_CONNECTING; |
| 208 | sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL; |
| 209 | sc->sc_intpsm = L2CAP_PSM_HID_INTR; |
| 210 | |
| 211 | sockopt_init(&sc->sc_mode, BTPROTO_L2CAP, SO_L2CAP_LM, 0); |
| 212 | mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); |
| 213 | cv_init(&sc->sc_cv, device_xname(self)); |
| 214 | |
| 215 | /* |
| 216 | * extract config from proplist |
| 217 | */ |
| 218 | obj = prop_dictionary_get(dict, BTDEVladdr); |
| 219 | bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); |
| 220 | |
| 221 | obj = prop_dictionary_get(dict, BTDEVraddr); |
| 222 | bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); |
| 223 | |
| 224 | obj = prop_dictionary_get(dict, BTDEVvendor); |
| 225 | vendor = (int)prop_number_integer_value(obj); |
| 226 | |
| 227 | obj = prop_dictionary_get(dict, BTDEVproduct); |
| 228 | product = (int)prop_number_integer_value(obj); |
| 229 | |
| 230 | obj = prop_dictionary_get(dict, BTDEVmode); |
| 231 | if (prop_object_type(obj) == PROP_TYPE_STRING) { |
| 232 | if (prop_string_equals_cstring(obj, BTDEVauth)) |
| 233 | sockopt_setint(&sc->sc_mode, L2CAP_LM_AUTH); |
| 234 | else if (prop_string_equals_cstring(obj, BTDEVencrypt)) |
| 235 | sockopt_setint(&sc->sc_mode, L2CAP_LM_ENCRYPT); |
| 236 | else if (prop_string_equals_cstring(obj, BTDEVsecure)) |
| 237 | sockopt_setint(&sc->sc_mode, L2CAP_LM_SECURE); |
| 238 | else { |
| 239 | aprint_error(" unknown %s\n" , BTDEVmode); |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | aprint_verbose(" %s %s" , BTDEVmode, |
| 244 | prop_string_cstring_nocopy(obj)); |
| 245 | } else |
| 246 | sockopt_setint(&sc->sc_mode, 0); |
| 247 | |
| 248 | obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm); |
| 249 | if (prop_object_type(obj) == PROP_TYPE_NUMBER) { |
| 250 | sc->sc_ctlpsm = prop_number_integer_value(obj); |
| 251 | if (L2CAP_PSM_INVALID(sc->sc_ctlpsm)) { |
| 252 | aprint_error(" invalid %s\n" , BTHIDEVcontrolpsm); |
| 253 | return; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm); |
| 258 | if (prop_object_type(obj) == PROP_TYPE_NUMBER) { |
| 259 | sc->sc_intpsm = prop_number_integer_value(obj); |
| 260 | if (L2CAP_PSM_INVALID(sc->sc_intpsm)) { |
| 261 | aprint_error(" invalid %s\n" , BTHIDEVinterruptpsm); |
| 262 | return; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | obj = prop_dictionary_get(dict, BTHIDEVdescriptor); |
| 267 | if (prop_object_type(obj) == PROP_TYPE_DATA) { |
| 268 | dlen = prop_data_size(obj); |
| 269 | desc = prop_data_data_nocopy(obj); |
| 270 | } else { |
| 271 | aprint_error(" no %s\n" , BTHIDEVdescriptor); |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | obj = prop_dictionary_get(dict, BTHIDEVreconnect); |
| 276 | if (prop_object_type(obj) == PROP_TYPE_BOOL |
| 277 | && !prop_bool_true(obj)) |
| 278 | sc->sc_flags |= BTHID_RECONNECT; |
| 279 | |
| 280 | /* |
| 281 | * Parse the descriptor and attach child devices, one per report. |
| 282 | */ |
| 283 | maxid = -1; |
| 284 | h.report_ID = 0; |
| 285 | d = hid_start_parse(desc, dlen, hid_none); |
| 286 | while (hid_get_item(d, &h)) { |
| 287 | if (h.report_ID > maxid) |
| 288 | maxid = h.report_ID; |
| 289 | } |
| 290 | hid_end_parse(d); |
| 291 | |
| 292 | if (maxid < 0) { |
| 293 | aprint_error(" no reports found\n" ); |
| 294 | return; |
| 295 | } |
| 296 | |
| 297 | aprint_normal("\n" ); |
| 298 | |
| 299 | if (kthread_create(PRI_NONE, KTHREAD_MUSTJOIN, NULL, bthidev_process, |
| 300 | sc, &sc->sc_lwp, "%s" , device_xname(self)) != 0) { |
| 301 | aprint_error_dev(self, "failed to create input thread\n" ); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | for (rep = 0 ; rep <= maxid ; rep++) { |
| 306 | if (hid_report_size(desc, dlen, hid_feature, rep) == 0 |
| 307 | && hid_report_size(desc, dlen, hid_input, rep) == 0 |
| 308 | && hid_report_size(desc, dlen, hid_output, rep) == 0) |
| 309 | continue; |
| 310 | |
| 311 | bha.ba_vendor = vendor; |
| 312 | bha.ba_product = product; |
| 313 | bha.ba_desc = desc; |
| 314 | bha.ba_dlen = dlen; |
| 315 | bha.ba_input = bthidev_null; |
| 316 | bha.ba_feature = bthidev_null; |
| 317 | bha.ba_output = bthidev_output; |
| 318 | bha.ba_id = rep; |
| 319 | |
| 320 | locs[BTHIDBUSCF_REPORTID] = rep; |
| 321 | |
| 322 | dev = config_found_sm_loc(self, "bthidbus" , |
| 323 | locs, &bha, bthidev_print, config_stdsubmatch); |
| 324 | if (dev != NULL) { |
| 325 | hidev = device_private(dev); |
| 326 | hidev->sc_dev = dev; |
| 327 | hidev->sc_parent = self; |
| 328 | hidev->sc_id = rep; |
| 329 | hidev->sc_input = bha.ba_input; |
| 330 | hidev->sc_feature = bha.ba_feature; |
| 331 | LIST_INSERT_HEAD(&sc->sc_list, hidev, sc_next); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | pmf_device_register(self, NULL, NULL); |
| 336 | |
| 337 | /* |
| 338 | * start bluetooth connections |
| 339 | */ |
| 340 | mutex_enter(bt_lock); |
| 341 | if ((sc->sc_flags & BTHID_RECONNECT) == 0 |
| 342 | && (err = bthidev_listen(sc)) != 0) |
| 343 | aprint_error_dev(self, "failed to listen (%d)\n" , err); |
| 344 | |
| 345 | if (sc->sc_flags & BTHID_CONNECTING) |
| 346 | bthidev_connect(sc); |
| 347 | mutex_exit(bt_lock); |
| 348 | } |
| 349 | |
| 350 | static int |
| 351 | bthidev_detach(device_t self, int flags) |
| 352 | { |
| 353 | struct bthidev_softc *sc = device_private(self); |
| 354 | struct bthidev *hidev; |
| 355 | |
| 356 | mutex_enter(bt_lock); |
| 357 | sc->sc_flags = 0; /* disable reconnecting */ |
| 358 | |
| 359 | /* release interrupt listen */ |
| 360 | if (sc->sc_int_l != NULL) { |
| 361 | l2cap_detach_pcb(&sc->sc_int_l); |
| 362 | sc->sc_int_l = NULL; |
| 363 | } |
| 364 | |
| 365 | /* release control listen */ |
| 366 | if (sc->sc_ctl_l != NULL) { |
| 367 | l2cap_detach_pcb(&sc->sc_ctl_l); |
| 368 | sc->sc_ctl_l = NULL; |
| 369 | } |
| 370 | |
| 371 | /* close interrupt channel */ |
| 372 | if (sc->sc_int != NULL) { |
| 373 | l2cap_disconnect_pcb(sc->sc_int, 0); |
| 374 | l2cap_detach_pcb(&sc->sc_int); |
| 375 | sc->sc_int = NULL; |
| 376 | } |
| 377 | |
| 378 | /* close control channel */ |
| 379 | if (sc->sc_ctl != NULL) { |
| 380 | l2cap_disconnect_pcb(sc->sc_ctl, 0); |
| 381 | l2cap_detach_pcb(&sc->sc_ctl); |
| 382 | sc->sc_ctl = NULL; |
| 383 | } |
| 384 | |
| 385 | callout_halt(&sc->sc_reconnect, bt_lock); |
| 386 | callout_destroy(&sc->sc_reconnect); |
| 387 | |
| 388 | mutex_exit(bt_lock); |
| 389 | |
| 390 | pmf_device_deregister(self); |
| 391 | |
| 392 | /* kill off the input processor */ |
| 393 | if (sc->sc_lwp != NULL) { |
| 394 | mutex_enter(&sc->sc_lock); |
| 395 | sc->sc_detach = 1; |
| 396 | cv_signal(&sc->sc_cv); |
| 397 | mutex_exit(&sc->sc_lock); |
| 398 | kthread_join(sc->sc_lwp); |
| 399 | sc->sc_lwp = NULL; |
| 400 | } |
| 401 | |
| 402 | /* detach children */ |
| 403 | while ((hidev = LIST_FIRST(&sc->sc_list)) != NULL) { |
| 404 | LIST_REMOVE(hidev, sc_next); |
| 405 | config_detach(hidev->sc_dev, flags); |
| 406 | } |
| 407 | |
| 408 | MBUFQ_DRAIN(&sc->sc_inq); |
| 409 | cv_destroy(&sc->sc_cv); |
| 410 | mutex_destroy(&sc->sc_lock); |
| 411 | sockopt_destroy(&sc->sc_mode); |
| 412 | |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | /* |
| 417 | * bthidev config print |
| 418 | */ |
| 419 | static int |
| 420 | bthidev_print(void *aux, const char *pnp) |
| 421 | { |
| 422 | struct bthidev_attach_args *ba = aux; |
| 423 | |
| 424 | if (pnp != NULL) |
| 425 | aprint_normal("%s:" , pnp); |
| 426 | |
| 427 | if (ba->ba_id > 0) |
| 428 | aprint_normal(" reportid %d" , ba->ba_id); |
| 429 | |
| 430 | return UNCONF; |
| 431 | } |
| 432 | |
| 433 | /***************************************************************************** |
| 434 | * |
| 435 | * bluetooth(4) HID attach/detach routines |
| 436 | */ |
| 437 | |
| 438 | /* |
| 439 | * callouts are scheduled after connections have been lost, in order |
| 440 | * to clean up and reconnect. |
| 441 | */ |
| 442 | static void |
| 443 | bthidev_timeout(void *arg) |
| 444 | { |
| 445 | struct bthidev_softc *sc = arg; |
| 446 | |
| 447 | mutex_enter(bt_lock); |
| 448 | callout_ack(&sc->sc_reconnect); |
| 449 | |
| 450 | switch (sc->sc_state) { |
| 451 | case BTHID_CLOSED: |
| 452 | if (sc->sc_int != NULL) { |
| 453 | l2cap_disconnect_pcb(sc->sc_int, 0); |
| 454 | break; |
| 455 | } |
| 456 | |
| 457 | if (sc->sc_ctl != NULL) { |
| 458 | l2cap_disconnect_pcb(sc->sc_ctl, 0); |
| 459 | break; |
| 460 | } |
| 461 | |
| 462 | if (sc->sc_flags & BTHID_RECONNECT) { |
| 463 | sc->sc_flags |= BTHID_CONNECTING; |
| 464 | bthidev_connect(sc); |
| 465 | break; |
| 466 | } |
| 467 | |
| 468 | break; |
| 469 | |
| 470 | case BTHID_WAIT_CTL: |
| 471 | break; |
| 472 | |
| 473 | case BTHID_WAIT_INT: |
| 474 | break; |
| 475 | |
| 476 | case BTHID_OPEN: |
| 477 | break; |
| 478 | |
| 479 | default: |
| 480 | break; |
| 481 | } |
| 482 | mutex_exit(bt_lock); |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * listen for our device |
| 487 | */ |
| 488 | static int |
| 489 | bthidev_listen(struct bthidev_softc *sc) |
| 490 | { |
| 491 | struct sockaddr_bt sa; |
| 492 | int err; |
| 493 | |
| 494 | memset(&sa, 0, sizeof(sa)); |
| 495 | sa.bt_len = sizeof(sa); |
| 496 | sa.bt_family = AF_BLUETOOTH; |
| 497 | bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); |
| 498 | |
| 499 | /* |
| 500 | * Listen on control PSM |
| 501 | */ |
| 502 | err = l2cap_attach_pcb(&sc->sc_ctl_l, &bthidev_ctl_proto, sc); |
| 503 | if (err) |
| 504 | return err; |
| 505 | |
| 506 | err = l2cap_setopt(sc->sc_ctl_l, &sc->sc_mode); |
| 507 | if (err) |
| 508 | return err; |
| 509 | |
| 510 | sa.bt_psm = sc->sc_ctlpsm; |
| 511 | err = l2cap_bind_pcb(sc->sc_ctl_l, &sa); |
| 512 | if (err) |
| 513 | return err; |
| 514 | |
| 515 | err = l2cap_listen_pcb(sc->sc_ctl_l); |
| 516 | if (err) |
| 517 | return err; |
| 518 | |
| 519 | /* |
| 520 | * Listen on interrupt PSM |
| 521 | */ |
| 522 | err = l2cap_attach_pcb(&sc->sc_int_l, &bthidev_int_proto, sc); |
| 523 | if (err) |
| 524 | return err; |
| 525 | |
| 526 | err = l2cap_setopt(sc->sc_int_l, &sc->sc_mode); |
| 527 | if (err) |
| 528 | return err; |
| 529 | |
| 530 | sa.bt_psm = sc->sc_intpsm; |
| 531 | err = l2cap_bind_pcb(sc->sc_int_l, &sa); |
| 532 | if (err) |
| 533 | return err; |
| 534 | |
| 535 | err = l2cap_listen_pcb(sc->sc_int_l); |
| 536 | if (err) |
| 537 | return err; |
| 538 | |
| 539 | sc->sc_state = BTHID_WAIT_CTL; |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | /* |
| 544 | * start connecting to our device |
| 545 | */ |
| 546 | static int |
| 547 | bthidev_connect(struct bthidev_softc *sc) |
| 548 | { |
| 549 | struct sockaddr_bt sa; |
| 550 | int err; |
| 551 | |
| 552 | if (sc->sc_attempts++ > 0) |
| 553 | aprint_verbose_dev(sc->sc_dev, "connect (#%d)\n" , sc->sc_attempts); |
| 554 | |
| 555 | memset(&sa, 0, sizeof(sa)); |
| 556 | sa.bt_len = sizeof(sa); |
| 557 | sa.bt_family = AF_BLUETOOTH; |
| 558 | |
| 559 | err = l2cap_attach_pcb(&sc->sc_ctl, &bthidev_ctl_proto, sc); |
| 560 | if (err) { |
| 561 | aprint_error_dev(sc->sc_dev, "l2cap_attach failed (%d)\n" , err); |
| 562 | return err; |
| 563 | } |
| 564 | |
| 565 | err = l2cap_setopt(sc->sc_ctl, &sc->sc_mode); |
| 566 | if (err) { |
| 567 | aprint_error_dev(sc->sc_dev, "l2cap_setopt failed (%d)\n" , err); |
| 568 | return err; |
| 569 | } |
| 570 | |
| 571 | bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); |
| 572 | err = l2cap_bind_pcb(sc->sc_ctl, &sa); |
| 573 | if (err) { |
| 574 | aprint_error_dev(sc->sc_dev, "l2cap_bind_pcb failed (%d)\n" , err); |
| 575 | return err; |
| 576 | } |
| 577 | |
| 578 | sa.bt_psm = sc->sc_ctlpsm; |
| 579 | bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); |
| 580 | err = l2cap_connect_pcb(sc->sc_ctl, &sa); |
| 581 | if (err) { |
| 582 | aprint_error_dev(sc->sc_dev, "l2cap_connect_pcb failed (%d)\n" , err); |
| 583 | return err; |
| 584 | } |
| 585 | |
| 586 | sc->sc_state = BTHID_WAIT_CTL; |
| 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * The LWP which processes input reports, forwarding to child devices. |
| 592 | * We are always either processing input reports, holding the lock, or |
| 593 | * waiting for a signal on condvar. |
| 594 | */ |
| 595 | static void |
| 596 | bthidev_process(void *arg) |
| 597 | { |
| 598 | struct bthidev_softc *sc = arg; |
| 599 | struct mbuf *m; |
| 600 | |
| 601 | mutex_enter(&sc->sc_lock); |
| 602 | while (sc->sc_detach == 0) { |
| 603 | MBUFQ_DEQUEUE(&sc->sc_inq, m); |
| 604 | if (m == NULL) { |
| 605 | cv_wait(&sc->sc_cv, &sc->sc_lock); |
| 606 | continue; |
| 607 | } |
| 608 | |
| 609 | mutex_exit(&sc->sc_lock); |
| 610 | bthidev_process_one(sc, m); |
| 611 | m_freem(m); |
| 612 | mutex_enter(&sc->sc_lock); |
| 613 | } |
| 614 | mutex_exit(&sc->sc_lock); |
| 615 | kthread_exit(0); |
| 616 | } |
| 617 | |
| 618 | static void |
| 619 | bthidev_process_one(struct bthidev_softc *sc, struct mbuf *m) |
| 620 | { |
| 621 | struct bthidev *hidev; |
| 622 | uint8_t *data; |
| 623 | int len; |
| 624 | |
| 625 | if (sc->sc_state != BTHID_OPEN) |
| 626 | return; |
| 627 | |
| 628 | if (m->m_pkthdr.len > m->m_len) |
| 629 | aprint_error_dev(sc->sc_dev, "truncating HID report\n" ); |
| 630 | |
| 631 | len = m->m_len; |
| 632 | data = mtod(m, uint8_t *); |
| 633 | |
| 634 | switch (BTHID_TYPE(data[0])) { |
| 635 | case BTHID_DATA: |
| 636 | /* |
| 637 | * data[0] == type / parameter |
| 638 | * data[1] == id |
| 639 | * data[2..len] == report |
| 640 | */ |
| 641 | if (len < 3) |
| 642 | break; |
| 643 | |
| 644 | LIST_FOREACH(hidev, &sc->sc_list, sc_next) |
| 645 | if (data[1] == hidev->sc_id) |
| 646 | break; |
| 647 | |
| 648 | if (hidev == NULL) { |
| 649 | aprint_error_dev(sc->sc_dev, |
| 650 | "report id %d, len = %d ignored\n" , data[1], len - 2); |
| 651 | |
| 652 | break; |
| 653 | } |
| 654 | |
| 655 | switch (BTHID_DATA_PARAM(data[0])) { |
| 656 | case BTHID_DATA_INPUT: |
| 657 | (*hidev->sc_input)(hidev, data + 2, len - 2); |
| 658 | break; |
| 659 | |
| 660 | case BTHID_DATA_FEATURE: |
| 661 | (*hidev->sc_feature)(hidev, data + 2, len - 2); |
| 662 | break; |
| 663 | |
| 664 | default: |
| 665 | break; |
| 666 | } |
| 667 | |
| 668 | break; |
| 669 | |
| 670 | case BTHID_CONTROL: |
| 671 | if (len < 1) |
| 672 | break; |
| 673 | |
| 674 | switch (BTHID_DATA_PARAM(data[0])) { |
| 675 | case BTHID_CONTROL_UNPLUG: |
| 676 | aprint_normal_dev(sc->sc_dev, "unplugged\n" ); |
| 677 | |
| 678 | mutex_enter(bt_lock); |
| 679 | /* close interrupt channel */ |
| 680 | if (sc->sc_int != NULL) { |
| 681 | l2cap_disconnect_pcb(sc->sc_int, 0); |
| 682 | l2cap_detach_pcb(&sc->sc_int); |
| 683 | sc->sc_int = NULL; |
| 684 | } |
| 685 | |
| 686 | /* close control channel */ |
| 687 | if (sc->sc_ctl != NULL) { |
| 688 | l2cap_disconnect_pcb(sc->sc_ctl, 0); |
| 689 | l2cap_detach_pcb(&sc->sc_ctl); |
| 690 | sc->sc_ctl = NULL; |
| 691 | } |
| 692 | mutex_exit(bt_lock); |
| 693 | |
| 694 | break; |
| 695 | |
| 696 | default: |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | break; |
| 701 | |
| 702 | default: |
| 703 | break; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | /***************************************************************************** |
| 708 | * |
| 709 | * bluetooth(9) callback methods for L2CAP |
| 710 | * |
| 711 | * All these are called from Bluetooth Protocol code, in a soft |
| 712 | * interrupt context at IPL_SOFTNET. |
| 713 | */ |
| 714 | |
| 715 | static void |
| 716 | bthidev_connecting(void *arg) |
| 717 | { |
| 718 | |
| 719 | /* dont care */ |
| 720 | } |
| 721 | |
| 722 | static void |
| 723 | bthidev_ctl_connected(void *arg) |
| 724 | { |
| 725 | struct sockaddr_bt sa; |
| 726 | struct bthidev_softc *sc = arg; |
| 727 | int err; |
| 728 | |
| 729 | if (sc->sc_state != BTHID_WAIT_CTL) |
| 730 | return; |
| 731 | |
| 732 | KASSERT(sc->sc_ctl != NULL); |
| 733 | KASSERT(sc->sc_int == NULL); |
| 734 | |
| 735 | if (sc->sc_flags & BTHID_CONNECTING) { |
| 736 | /* initiate connect on interrupt PSM */ |
| 737 | err = l2cap_attach_pcb(&sc->sc_int, &bthidev_int_proto, sc); |
| 738 | if (err) |
| 739 | goto fail; |
| 740 | |
| 741 | err = l2cap_setopt(sc->sc_int, &sc->sc_mode); |
| 742 | if (err) |
| 743 | goto fail; |
| 744 | |
| 745 | memset(&sa, 0, sizeof(sa)); |
| 746 | sa.bt_len = sizeof(sa); |
| 747 | sa.bt_family = AF_BLUETOOTH; |
| 748 | bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); |
| 749 | |
| 750 | err = l2cap_bind_pcb(sc->sc_int, &sa); |
| 751 | if (err) |
| 752 | goto fail; |
| 753 | |
| 754 | sa.bt_psm = sc->sc_intpsm; |
| 755 | bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); |
| 756 | err = l2cap_connect_pcb(sc->sc_int, &sa); |
| 757 | if (err) |
| 758 | goto fail; |
| 759 | } |
| 760 | |
| 761 | sc->sc_state = BTHID_WAIT_INT; |
| 762 | return; |
| 763 | |
| 764 | fail: |
| 765 | l2cap_detach_pcb(&sc->sc_ctl); |
| 766 | sc->sc_ctl = NULL; |
| 767 | |
| 768 | aprint_error_dev(sc->sc_dev, "connect failed (%d)\n" , err); |
| 769 | } |
| 770 | |
| 771 | static void |
| 772 | bthidev_int_connected(void *arg) |
| 773 | { |
| 774 | struct bthidev_softc *sc = arg; |
| 775 | |
| 776 | if (sc->sc_state != BTHID_WAIT_INT) |
| 777 | return; |
| 778 | |
| 779 | KASSERT(sc->sc_ctl != NULL); |
| 780 | KASSERT(sc->sc_int != NULL); |
| 781 | |
| 782 | sc->sc_attempts = 0; |
| 783 | sc->sc_flags &= ~BTHID_CONNECTING; |
| 784 | sc->sc_state = BTHID_OPEN; |
| 785 | |
| 786 | aprint_normal_dev(sc->sc_dev, "connected\n" ); |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * Disconnected |
| 791 | * |
| 792 | * Depending on our state, this could mean several things, but essentially |
| 793 | * we are lost. If both channels are closed, and we are marked to reconnect, |
| 794 | * schedule another try otherwise just give up. They will contact us. |
| 795 | */ |
| 796 | static void |
| 797 | bthidev_ctl_disconnected(void *arg, int err) |
| 798 | { |
| 799 | struct bthidev_softc *sc = arg; |
| 800 | |
| 801 | if (sc->sc_ctl != NULL) { |
| 802 | l2cap_detach_pcb(&sc->sc_ctl); |
| 803 | sc->sc_ctl = NULL; |
| 804 | } |
| 805 | |
| 806 | sc->sc_state = BTHID_CLOSED; |
| 807 | |
| 808 | if (sc->sc_int == NULL) { |
| 809 | aprint_normal_dev(sc->sc_dev, "disconnected (%d)\n" , err); |
| 810 | sc->sc_flags &= ~BTHID_CONNECTING; |
| 811 | |
| 812 | if (sc->sc_flags & BTHID_RECONNECT) |
| 813 | callout_schedule(&sc->sc_reconnect, |
| 814 | BTHID_RETRY_INTERVAL * hz); |
| 815 | else |
| 816 | sc->sc_state = BTHID_WAIT_CTL; |
| 817 | } else { |
| 818 | /* |
| 819 | * The interrupt channel should have been closed first, |
| 820 | * but its potentially unsafe to detach that from here. |
| 821 | * Give them a second to do the right thing or let the |
| 822 | * callout handle it. |
| 823 | */ |
| 824 | callout_schedule(&sc->sc_reconnect, hz); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | static void |
| 829 | bthidev_int_disconnected(void *arg, int err) |
| 830 | { |
| 831 | struct bthidev_softc *sc = arg; |
| 832 | |
| 833 | if (sc->sc_int != NULL) { |
| 834 | l2cap_detach_pcb(&sc->sc_int); |
| 835 | sc->sc_int = NULL; |
| 836 | } |
| 837 | |
| 838 | sc->sc_state = BTHID_CLOSED; |
| 839 | |
| 840 | if (sc->sc_ctl == NULL) { |
| 841 | aprint_normal_dev(sc->sc_dev, "disconnected (%d)\n" , err); |
| 842 | sc->sc_flags &= ~BTHID_CONNECTING; |
| 843 | |
| 844 | if (sc->sc_flags & BTHID_RECONNECT) |
| 845 | callout_schedule(&sc->sc_reconnect, |
| 846 | BTHID_RETRY_INTERVAL * hz); |
| 847 | else |
| 848 | sc->sc_state = BTHID_WAIT_CTL; |
| 849 | } else { |
| 850 | /* |
| 851 | * The control channel should be closing also, allow |
| 852 | * them a chance to do that before we force it. |
| 853 | */ |
| 854 | callout_schedule(&sc->sc_reconnect, hz); |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | /* |
| 859 | * New Connections |
| 860 | * |
| 861 | * We give a new L2CAP handle back if this matches the BDADDR we are |
| 862 | * listening for and we are in the right state. bthidev_connected will |
| 863 | * be called when the connection is open, so nothing else to do here |
| 864 | */ |
| 865 | static void * |
| 866 | bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr, |
| 867 | struct sockaddr_bt *raddr) |
| 868 | { |
| 869 | struct bthidev_softc *sc = arg; |
| 870 | |
| 871 | if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) |
| 872 | return NULL; |
| 873 | |
| 874 | if ((sc->sc_flags & BTHID_CONNECTING) |
| 875 | || sc->sc_state != BTHID_WAIT_CTL |
| 876 | || sc->sc_ctl != NULL |
| 877 | || sc->sc_int != NULL) { |
| 878 | aprint_verbose_dev(sc->sc_dev, "reject ctl newconn %s%s%s%s\n" , |
| 879 | (sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "" , |
| 880 | (sc->sc_state == BTHID_WAIT_CTL) ? " (WAITING)" : "" , |
| 881 | (sc->sc_ctl != NULL) ? " (GOT CONTROL)" : "" , |
| 882 | (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : "" ); |
| 883 | |
| 884 | return NULL; |
| 885 | } |
| 886 | |
| 887 | l2cap_attach_pcb(&sc->sc_ctl, &bthidev_ctl_proto, sc); |
| 888 | return sc->sc_ctl; |
| 889 | } |
| 890 | |
| 891 | static void * |
| 892 | bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr, |
| 893 | struct sockaddr_bt *raddr) |
| 894 | { |
| 895 | struct bthidev_softc *sc = arg; |
| 896 | |
| 897 | if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) |
| 898 | return NULL; |
| 899 | |
| 900 | if ((sc->sc_flags & BTHID_CONNECTING) |
| 901 | || sc->sc_state != BTHID_WAIT_INT |
| 902 | || sc->sc_ctl == NULL |
| 903 | || sc->sc_int != NULL) { |
| 904 | aprint_verbose_dev(sc->sc_dev, "reject int newconn %s%s%s%s\n" , |
| 905 | (sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "" , |
| 906 | (sc->sc_state == BTHID_WAIT_INT) ? " (WAITING)" : "" , |
| 907 | (sc->sc_ctl == NULL) ? " (NO CONTROL)" : "" , |
| 908 | (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : "" ); |
| 909 | |
| 910 | return NULL; |
| 911 | } |
| 912 | |
| 913 | l2cap_attach_pcb(&sc->sc_int, &bthidev_int_proto, sc); |
| 914 | return sc->sc_int; |
| 915 | } |
| 916 | |
| 917 | static void |
| 918 | bthidev_complete(void *arg, int count) |
| 919 | { |
| 920 | |
| 921 | /* dont care */ |
| 922 | } |
| 923 | |
| 924 | static void |
| 925 | bthidev_linkmode(void *arg, int new) |
| 926 | { |
| 927 | struct bthidev_softc *sc = arg; |
| 928 | int mode; |
| 929 | |
| 930 | (void)sockopt_getint(&sc->sc_mode, &mode); |
| 931 | |
| 932 | if ((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) |
| 933 | aprint_error_dev(sc->sc_dev, "auth failed\n" ); |
| 934 | else if ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) |
| 935 | aprint_error_dev(sc->sc_dev, "encrypt off\n" ); |
| 936 | else if ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)) |
| 937 | aprint_error_dev(sc->sc_dev, "insecure\n" ); |
| 938 | else |
| 939 | return; |
| 940 | |
| 941 | if (sc->sc_int != NULL) |
| 942 | l2cap_disconnect_pcb(sc->sc_int, 0); |
| 943 | |
| 944 | if (sc->sc_ctl != NULL) |
| 945 | l2cap_disconnect_pcb(sc->sc_ctl, 0); |
| 946 | } |
| 947 | |
| 948 | /* |
| 949 | * Receive reports from the protocol stack. Because this will be called |
| 950 | * with bt_lock held, we queue the mbuf and process it with a kernel thread |
| 951 | */ |
| 952 | static void |
| 953 | bthidev_input(void *arg, struct mbuf *m) |
| 954 | { |
| 955 | struct bthidev_softc *sc = arg; |
| 956 | |
| 957 | if (sc->sc_state != BTHID_OPEN) { |
| 958 | m_freem(m); |
| 959 | return; |
| 960 | } |
| 961 | |
| 962 | mutex_enter(&sc->sc_lock); |
| 963 | MBUFQ_ENQUEUE(&sc->sc_inq, m); |
| 964 | cv_signal(&sc->sc_cv); |
| 965 | mutex_exit(&sc->sc_lock); |
| 966 | } |
| 967 | |
| 968 | /***************************************************************************** |
| 969 | * |
| 970 | * IO routines |
| 971 | */ |
| 972 | |
| 973 | static void |
| 974 | bthidev_null(struct bthidev *hidev, uint8_t *report, int len) |
| 975 | { |
| 976 | |
| 977 | /* |
| 978 | * empty routine just in case the device |
| 979 | * provided no method to handle this report |
| 980 | */ |
| 981 | } |
| 982 | |
| 983 | static int |
| 984 | bthidev_output(struct bthidev *hidev, uint8_t *report, int rlen) |
| 985 | { |
| 986 | struct bthidev_softc *sc = device_private(hidev->sc_parent); |
| 987 | struct mbuf *m; |
| 988 | int err; |
| 989 | |
| 990 | if (sc == NULL || sc->sc_state != BTHID_OPEN) |
| 991 | return ENOTCONN; |
| 992 | |
| 993 | KASSERT(sc->sc_ctl != NULL); |
| 994 | KASSERT(sc->sc_int != NULL); |
| 995 | |
| 996 | if (rlen == 0 || report == NULL) |
| 997 | return 0; |
| 998 | |
| 999 | if (rlen > MHLEN - 2) { |
| 1000 | aprint_error_dev(sc->sc_dev, |
| 1001 | "output report too long (%d)!\n" , rlen); |
| 1002 | return EMSGSIZE; |
| 1003 | } |
| 1004 | |
| 1005 | m = m_gethdr(M_DONTWAIT, MT_DATA); |
| 1006 | if (m == NULL) |
| 1007 | return ENOMEM; |
| 1008 | |
| 1009 | /* |
| 1010 | * data[0] = type / parameter |
| 1011 | * data[1] = id |
| 1012 | * data[2..N] = report |
| 1013 | */ |
| 1014 | mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT); |
| 1015 | mtod(m, uint8_t *)[1] = hidev->sc_id; |
| 1016 | memcpy(mtod(m, uint8_t *) + 2, report, rlen); |
| 1017 | m->m_pkthdr.len = m->m_len = rlen + 2; |
| 1018 | |
| 1019 | mutex_enter(bt_lock); |
| 1020 | err = l2cap_send_pcb(sc->sc_int, m); |
| 1021 | mutex_exit(bt_lock); |
| 1022 | |
| 1023 | return err; |
| 1024 | } |
| 1025 | |