btmagic.c revision 1.10
1 /* $NetBSD: btmagic.c,v 1.10 2014/07/31 03:39:35 rtr Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Iain Hibbert. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Lennart Augustsson (lennart (at) augustsson.net) at 12 * Carlstedt Research & Technology. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /*- 36 * Copyright (c) 2006 Itronix Inc. 37 * All rights reserved. 38 * 39 * Written by Iain Hibbert for Itronix Inc. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. The name of Itronix Inc. may not be used to endorse 50 * or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 57 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 59 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 60 * ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 67 /***************************************************************************** 68 * 69 * Apple Bluetooth Magic Mouse driver 70 * 71 * The Apple Magic Mouse is a HID device but it doesn't provide a proper HID 72 * descriptor, and requires extra initializations to enable the proprietary 73 * touch reports. We match against the vendor-id and product-id and provide 74 * our own Bluetooth connection handling as the bthidev driver does not cater 75 * for such complications. 76 * 77 * This driver interprets the touch reports only as far as emulating a 78 * middle mouse button and providing horizontal and vertical scroll action. 79 * Full gesture support would be more complicated and is left as an exercise 80 * for the reader. 81 * 82 * Credit for decoding the proprietary touch reports goes to Michael Poole 83 * who wrote the Linux hid-magicmouse input driver. 84 * 85 *****************************************************************************/ 86 87 #include <sys/cdefs.h> 88 __KERNEL_RCSID(0, "$NetBSD: btmagic.c,v 1.10 2014/07/31 03:39:35 rtr Exp $"); 89 90 #include <sys/param.h> 91 #include <sys/conf.h> 92 #include <sys/device.h> 93 #include <sys/fcntl.h> 94 #include <sys/kernel.h> 95 #include <sys/malloc.h> 96 #include <sys/mbuf.h> 97 #include <sys/proc.h> 98 #include <sys/socketvar.h> 99 #include <sys/systm.h> 100 #include <sys/sysctl.h> 101 102 #include <prop/proplib.h> 103 104 #include <netbt/bluetooth.h> 105 #include <netbt/l2cap.h> 106 107 #include <dev/bluetooth/btdev.h> 108 #include <dev/bluetooth/bthid.h> 109 #include <dev/bluetooth/bthidev.h> 110 111 #include <dev/usb/hid.h> 112 #include <dev/usb/usb.h> 113 #include <dev/usb/usbdevs.h> 114 115 #include <dev/wscons/wsconsio.h> 116 #include <dev/wscons/wsmousevar.h> 117 118 #undef DPRINTF 119 #ifdef BTMAGIC_DEBUG 120 #define DPRINTF(sc, ...) do { \ 121 printf("%s: ", device_xname((sc)->sc_dev)); \ 122 printf(__VA_ARGS__); \ 123 printf("\n"); \ 124 } while (/*CONSTCOND*/0) 125 #else 126 #define DPRINTF(...) (void)0 127 #endif 128 129 struct btmagic_softc { 130 bdaddr_t sc_laddr; /* local address */ 131 bdaddr_t sc_raddr; /* remote address */ 132 struct sockopt sc_mode; /* link mode */ 133 134 device_t sc_dev; 135 uint16_t sc_state; 136 uint16_t sc_flags; 137 138 callout_t sc_timeout; 139 140 /* control */ 141 struct l2cap_channel *sc_ctl; 142 struct l2cap_channel *sc_ctl_l; 143 144 /* interrupt */ 145 struct l2cap_channel *sc_int; 146 struct l2cap_channel *sc_int_l; 147 148 /* wsmouse child */ 149 device_t sc_wsmouse; 150 int sc_enabled; 151 152 /* config */ 153 int sc_resolution; /* for soft scaling */ 154 int sc_firm; /* firm touch threshold */ 155 int sc_dist; /* scroll distance threshold */ 156 int sc_scale; /* scroll descaling */ 157 struct sysctllog *sc_log; /* sysctl teardown log */ 158 159 /* remainders */ 160 int sc_rx; 161 int sc_ry; 162 int sc_rz; 163 int sc_rw; 164 165 /* previous touches */ 166 uint32_t sc_smask; /* scrolling */ 167 int sc_az[16]; 168 int sc_aw[16]; 169 170 /* previous mouse buttons */ 171 uint32_t sc_mb; 172 }; 173 174 /* sc_flags */ 175 #define BTMAGIC_CONNECTING __BIT(0) /* we are connecting */ 176 #define BTMAGIC_ENABLED __BIT(1) /* touch reports enabled */ 177 178 /* sc_state */ 179 #define BTMAGIC_CLOSED 0 180 #define BTMAGIC_WAIT_CTL 1 181 #define BTMAGIC_WAIT_INT 2 182 #define BTMAGIC_OPEN 3 183 184 /* autoconf(9) glue */ 185 static int btmagic_match(device_t, cfdata_t, void *); 186 static void btmagic_attach(device_t, device_t, void *); 187 static int btmagic_detach(device_t, int); 188 static int btmagic_listen(struct btmagic_softc *); 189 static int btmagic_connect(struct btmagic_softc *); 190 static int btmagic_sysctl_resolution(SYSCTLFN_PROTO); 191 static int btmagic_sysctl_scale(SYSCTLFN_PROTO); 192 193 CFATTACH_DECL_NEW(btmagic, sizeof(struct btmagic_softc), 194 btmagic_match, btmagic_attach, btmagic_detach, NULL); 195 196 /* wsmouse(4) accessops */ 197 static int btmagic_wsmouse_enable(void *); 198 static int btmagic_wsmouse_ioctl(void *, unsigned long, void *, int, struct lwp *); 199 static void btmagic_wsmouse_disable(void *); 200 201 static const struct wsmouse_accessops btmagic_wsmouse_accessops = { 202 btmagic_wsmouse_enable, 203 btmagic_wsmouse_ioctl, 204 btmagic_wsmouse_disable, 205 }; 206 207 /* bluetooth(9) protocol methods for L2CAP */ 208 static void btmagic_connecting(void *); 209 static void btmagic_ctl_connected(void *); 210 static void btmagic_int_connected(void *); 211 static void btmagic_ctl_disconnected(void *, int); 212 static void btmagic_int_disconnected(void *, int); 213 static void *btmagic_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 214 static void *btmagic_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 215 static void btmagic_complete(void *, int); 216 static void btmagic_linkmode(void *, int); 217 static void btmagic_input(void *, struct mbuf *); 218 static void btmagic_input_basic(struct btmagic_softc *, uint8_t *, size_t); 219 static void btmagic_input_magic(struct btmagic_softc *, uint8_t *, size_t); 220 221 static const struct btproto btmagic_ctl_proto = { 222 btmagic_connecting, 223 btmagic_ctl_connected, 224 btmagic_ctl_disconnected, 225 btmagic_ctl_newconn, 226 btmagic_complete, 227 btmagic_linkmode, 228 btmagic_input, 229 }; 230 231 static const struct btproto btmagic_int_proto = { 232 btmagic_connecting, 233 btmagic_int_connected, 234 btmagic_int_disconnected, 235 btmagic_int_newconn, 236 btmagic_complete, 237 btmagic_linkmode, 238 btmagic_input, 239 }; 240 241 /* btmagic internals */ 242 static void btmagic_timeout(void *); 243 static int btmagic_ctl_send(struct btmagic_softc *, const uint8_t *, size_t); 244 static void btmagic_enable(struct btmagic_softc *); 245 static void btmagic_check_battery(struct btmagic_softc *); 246 static int btmagic_scale(int, int *, int); 247 248 249 /***************************************************************************** 250 * 251 * Magic Mouse autoconf(9) routines 252 */ 253 254 static int 255 btmagic_match(device_t self, cfdata_t cfdata, void *aux) 256 { 257 uint16_t v, p; 258 259 if (prop_dictionary_get_uint16(aux, BTDEVvendor, &v) 260 && prop_dictionary_get_uint16(aux, BTDEVproduct, &p) 261 && v == USB_VENDOR_APPLE 262 && p == USB_PRODUCT_APPLE_MAGICMOUSE) 263 return 2; /* trump bthidev(4) */ 264 265 return 0; 266 } 267 268 static void 269 btmagic_attach(device_t parent, device_t self, void *aux) 270 { 271 struct btmagic_softc *sc = device_private(self); 272 struct wsmousedev_attach_args wsma; 273 const struct sysctlnode *node; 274 prop_object_t obj; 275 int err; 276 277 /* 278 * Init softc 279 */ 280 sc->sc_dev = self; 281 sc->sc_state = BTMAGIC_CLOSED; 282 callout_init(&sc->sc_timeout, 0); 283 callout_setfunc(&sc->sc_timeout, btmagic_timeout, sc); 284 sockopt_init(&sc->sc_mode, BTPROTO_L2CAP, SO_L2CAP_LM, 0); 285 286 /* 287 * extract config from proplist 288 */ 289 obj = prop_dictionary_get(aux, BTDEVladdr); 290 bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); 291 292 obj = prop_dictionary_get(aux, BTDEVraddr); 293 bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); 294 295 obj = prop_dictionary_get(aux, BTDEVmode); 296 if (prop_object_type(obj) == PROP_TYPE_STRING) { 297 if (prop_string_equals_cstring(obj, BTDEVauth)) 298 sockopt_setint(&sc->sc_mode, L2CAP_LM_AUTH); 299 else if (prop_string_equals_cstring(obj, BTDEVencrypt)) 300 sockopt_setint(&sc->sc_mode, L2CAP_LM_ENCRYPT); 301 else if (prop_string_equals_cstring(obj, BTDEVsecure)) 302 sockopt_setint(&sc->sc_mode, L2CAP_LM_SECURE); 303 else { 304 aprint_error(" unknown %s\n", BTDEVmode); 305 return; 306 } 307 308 aprint_verbose(" %s %s", BTDEVmode, 309 prop_string_cstring_nocopy(obj)); 310 } else 311 sockopt_setint(&sc->sc_mode, 0); 312 313 aprint_normal(": 3 buttons, W and Z dirs\n"); 314 aprint_naive("\n"); 315 316 /* 317 * set defaults 318 */ 319 sc->sc_resolution = 650; 320 sc->sc_firm = 6; 321 sc->sc_dist = 130; 322 sc->sc_scale = 20; 323 324 sysctl_createv(&sc->sc_log, 0, NULL, &node, 325 0, 326 CTLTYPE_NODE, device_xname(self), 327 NULL, 328 NULL, 0, 329 NULL, 0, 330 CTL_HW, 331 CTL_CREATE, CTL_EOL); 332 333 if (node != NULL) { 334 sysctl_createv(&sc->sc_log, 0, NULL, NULL, 335 CTLFLAG_READWRITE, 336 CTLTYPE_INT, "soft_resolution", 337 NULL, 338 btmagic_sysctl_resolution, 0, 339 (void *)sc, 0, 340 CTL_HW, node->sysctl_num, 341 CTL_CREATE, CTL_EOL); 342 343 sysctl_createv(&sc->sc_log, 0, NULL, NULL, 344 CTLFLAG_READWRITE, 345 CTLTYPE_INT, "firm_touch_threshold", 346 NULL, 347 NULL, 0, 348 &sc->sc_firm, sizeof(sc->sc_firm), 349 CTL_HW, node->sysctl_num, 350 CTL_CREATE, CTL_EOL); 351 352 sysctl_createv(&sc->sc_log, 0, NULL, NULL, 353 CTLFLAG_READWRITE, 354 CTLTYPE_INT, "scroll_distance_threshold", 355 NULL, 356 NULL, 0, 357 &sc->sc_dist, sizeof(sc->sc_dist), 358 CTL_HW, node->sysctl_num, 359 CTL_CREATE, CTL_EOL); 360 361 sysctl_createv(&sc->sc_log, 0, NULL, NULL, 362 CTLFLAG_READWRITE, 363 CTLTYPE_INT, "scroll_downscale_factor", 364 NULL, 365 btmagic_sysctl_scale, 0, 366 (void *)sc, 0, 367 CTL_HW, node->sysctl_num, 368 CTL_CREATE, CTL_EOL); 369 } 370 371 /* 372 * attach the wsmouse 373 */ 374 wsma.accessops = &btmagic_wsmouse_accessops; 375 wsma.accesscookie = self; 376 sc->sc_wsmouse = config_found(self, &wsma, wsmousedevprint); 377 if (sc->sc_wsmouse == NULL) { 378 aprint_error_dev(self, "failed to attach wsmouse\n"); 379 return; 380 } 381 382 pmf_device_register(self, NULL, NULL); 383 384 /* 385 * start bluetooth connections 386 */ 387 mutex_enter(bt_lock); 388 if ((err = btmagic_listen(sc)) != 0) 389 aprint_error_dev(self, "failed to listen (%d)\n", err); 390 btmagic_connect(sc); 391 mutex_exit(bt_lock); 392 } 393 394 static int 395 btmagic_detach(device_t self, int flags) 396 { 397 struct btmagic_softc *sc = device_private(self); 398 int err = 0; 399 400 mutex_enter(bt_lock); 401 402 /* release interrupt listen */ 403 if (sc->sc_int_l != NULL) { 404 l2cap_detach_pcb(&sc->sc_int_l); 405 sc->sc_int_l = NULL; 406 } 407 408 /* release control listen */ 409 if (sc->sc_ctl_l != NULL) { 410 l2cap_detach_pcb(&sc->sc_ctl_l); 411 sc->sc_ctl_l = NULL; 412 } 413 414 /* close interrupt channel */ 415 if (sc->sc_int != NULL) { 416 l2cap_disconnect_pcb(sc->sc_int, 0); 417 l2cap_detach_pcb(&sc->sc_int); 418 sc->sc_int = NULL; 419 } 420 421 /* close control channel */ 422 if (sc->sc_ctl != NULL) { 423 l2cap_disconnect_pcb(sc->sc_ctl, 0); 424 l2cap_detach_pcb(&sc->sc_ctl); 425 sc->sc_ctl = NULL; 426 } 427 428 callout_halt(&sc->sc_timeout, bt_lock); 429 callout_destroy(&sc->sc_timeout); 430 431 mutex_exit(bt_lock); 432 433 pmf_device_deregister(self); 434 435 sockopt_destroy(&sc->sc_mode); 436 437 sysctl_teardown(&sc->sc_log); 438 439 if (sc->sc_wsmouse != NULL) { 440 err = config_detach(sc->sc_wsmouse, flags); 441 sc->sc_wsmouse = NULL; 442 } 443 444 return err; 445 } 446 447 /* 448 * listen for our device 449 * 450 * bt_lock is held 451 */ 452 static int 453 btmagic_listen(struct btmagic_softc *sc) 454 { 455 struct sockaddr_bt sa; 456 int err; 457 458 memset(&sa, 0, sizeof(sa)); 459 sa.bt_len = sizeof(sa); 460 sa.bt_family = AF_BLUETOOTH; 461 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 462 463 /* 464 * Listen on control PSM 465 */ 466 err = l2cap_attach_pcb(&sc->sc_ctl_l, &btmagic_ctl_proto, sc); 467 if (err) 468 return err; 469 470 err = l2cap_setopt(sc->sc_ctl_l, &sc->sc_mode); 471 if (err) 472 return err; 473 474 sa.bt_psm = L2CAP_PSM_HID_CNTL; 475 err = l2cap_bind_pcb(sc->sc_ctl_l, &sa); 476 if (err) 477 return err; 478 479 err = l2cap_listen_pcb(sc->sc_ctl_l); 480 if (err) 481 return err; 482 483 /* 484 * Listen on interrupt PSM 485 */ 486 err = l2cap_attach_pcb(&sc->sc_int_l, &btmagic_int_proto, sc); 487 if (err) 488 return err; 489 490 err = l2cap_setopt(sc->sc_int_l, &sc->sc_mode); 491 if (err) 492 return err; 493 494 sa.bt_psm = L2CAP_PSM_HID_INTR; 495 err = l2cap_bind_pcb(sc->sc_int_l, &sa); 496 if (err) 497 return err; 498 499 err = l2cap_listen_pcb(sc->sc_int_l); 500 if (err) 501 return err; 502 503 sc->sc_state = BTMAGIC_WAIT_CTL; 504 return 0; 505 } 506 507 /* 508 * start connecting to our device 509 * 510 * bt_lock is held 511 */ 512 static int 513 btmagic_connect(struct btmagic_softc *sc) 514 { 515 struct sockaddr_bt sa; 516 int err; 517 518 memset(&sa, 0, sizeof(sa)); 519 sa.bt_len = sizeof(sa); 520 sa.bt_family = AF_BLUETOOTH; 521 522 err = l2cap_attach_pcb(&sc->sc_ctl, &btmagic_ctl_proto, sc); 523 if (err) { 524 printf("%s: l2cap_attach failed (%d)\n", 525 device_xname(sc->sc_dev), err); 526 return err; 527 } 528 529 err = l2cap_setopt(sc->sc_ctl, &sc->sc_mode); 530 if (err) { 531 printf("%s: l2cap_setopt failed (%d)\n", 532 device_xname(sc->sc_dev), err); 533 return err; 534 } 535 536 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 537 err = l2cap_bind_pcb(sc->sc_ctl, &sa); 538 if (err) { 539 printf("%s: l2cap_bind_pcb failed (%d)\n", 540 device_xname(sc->sc_dev), err); 541 return err; 542 } 543 544 sa.bt_psm = L2CAP_PSM_HID_CNTL; 545 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 546 err = l2cap_connect_pcb(sc->sc_ctl, &sa); 547 if (err) { 548 printf("%s: l2cap_connect_pcb failed (%d)\n", 549 device_xname(sc->sc_dev), err); 550 return err; 551 } 552 553 SET(sc->sc_flags, BTMAGIC_CONNECTING); 554 sc->sc_state = BTMAGIC_WAIT_CTL; 555 return 0; 556 } 557 558 /* validate soft_resolution */ 559 static int 560 btmagic_sysctl_resolution(SYSCTLFN_ARGS) 561 { 562 struct sysctlnode node; 563 struct btmagic_softc *sc; 564 int t, error; 565 566 node = *rnode; 567 sc = node.sysctl_data; 568 569 t = sc->sc_resolution; 570 node.sysctl_data = &t; 571 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 572 if (error || newp == NULL) 573 return error; 574 575 if (t < 100 || t > 4000 || (t / sc->sc_scale) == 0) 576 return EINVAL; 577 578 sc->sc_resolution = t; 579 DPRINTF(sc, "sc_resolution = %u", t); 580 return 0; 581 } 582 583 /* validate scroll_downscale_factor */ 584 static int 585 btmagic_sysctl_scale(SYSCTLFN_ARGS) 586 { 587 struct sysctlnode node; 588 struct btmagic_softc *sc; 589 int t, error; 590 591 node = *rnode; 592 sc = node.sysctl_data; 593 594 t = sc->sc_scale; 595 node.sysctl_data = &t; 596 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 597 if (error || newp == NULL) 598 return error; 599 600 if (t < 1 || t > 40 || (sc->sc_resolution / t) == 0) 601 return EINVAL; 602 603 sc->sc_scale = t; 604 DPRINTF(sc, "sc_scale = %u", t); 605 return 0; 606 } 607 608 /***************************************************************************** 609 * 610 * wsmouse(4) accessops 611 */ 612 613 static int 614 btmagic_wsmouse_enable(void *self) 615 { 616 struct btmagic_softc *sc = device_private(self); 617 618 if (sc->sc_enabled) 619 return EBUSY; 620 621 sc->sc_enabled = 1; 622 DPRINTF(sc, "enable"); 623 return 0; 624 } 625 626 static int 627 btmagic_wsmouse_ioctl(void *self, unsigned long cmd, void *data, 628 int flag, struct lwp *l) 629 { 630 /* struct btmagic_softc *sc = device_private(self); */ 631 int err; 632 633 switch (cmd) { 634 case WSMOUSEIO_GTYPE: 635 *(uint *)data = WSMOUSE_TYPE_BLUETOOTH; 636 err = 0; 637 break; 638 639 default: 640 err = EPASSTHROUGH; 641 break; 642 } 643 644 return err; 645 } 646 647 static void 648 btmagic_wsmouse_disable(void *self) 649 { 650 struct btmagic_softc *sc = device_private(self); 651 652 DPRINTF(sc, "disable"); 653 sc->sc_enabled = 0; 654 } 655 656 657 /***************************************************************************** 658 * 659 * setup routines 660 */ 661 662 static void 663 btmagic_timeout(void *arg) 664 { 665 struct btmagic_softc *sc = arg; 666 667 mutex_enter(bt_lock); 668 callout_ack(&sc->sc_timeout); 669 670 switch (sc->sc_state) { 671 case BTMAGIC_CLOSED: 672 if (sc->sc_int != NULL) { 673 l2cap_disconnect_pcb(sc->sc_int, 0); 674 break; 675 } 676 677 if (sc->sc_ctl != NULL) { 678 l2cap_disconnect_pcb(sc->sc_ctl, 0); 679 break; 680 } 681 break; 682 683 case BTMAGIC_OPEN: 684 if (!ISSET(sc->sc_flags, BTMAGIC_ENABLED)) { 685 btmagic_enable(sc); 686 break; 687 } 688 689 btmagic_check_battery(sc); 690 break; 691 692 case BTMAGIC_WAIT_CTL: 693 case BTMAGIC_WAIT_INT: 694 default: 695 break; 696 } 697 mutex_exit(bt_lock); 698 } 699 700 /* 701 * Send report on control channel 702 * 703 * bt_lock is held 704 */ 705 static int 706 btmagic_ctl_send(struct btmagic_softc *sc, const uint8_t *data, size_t len) 707 { 708 struct mbuf *m; 709 710 if (len > MLEN) 711 return EINVAL; 712 713 m = m_gethdr(M_DONTWAIT, MT_DATA); 714 if (m == NULL) 715 return ENOMEM; 716 717 #ifdef BTMAGIC_DEBUG 718 printf("%s: send", device_xname(sc->sc_dev)); 719 for (size_t i = 0; i < len; i++) 720 printf(" 0x%02x", data[i]); 721 printf("\n"); 722 #endif 723 724 memcpy(mtod(m, uint8_t *), data, len); 725 m->m_pkthdr.len = m->m_len = len; 726 return l2cap_send(sc->sc_ctl, m); 727 } 728 729 /* 730 * Enable touch reports by sending the following report 731 * 732 * SET_REPORT(FEATURE, 0xd7) = 0x01 733 * 734 * bt_lock is held 735 */ 736 static void 737 btmagic_enable(struct btmagic_softc *sc) 738 { 739 static const uint8_t rep[] = { 0x53, 0xd7, 0x01 }; 740 741 if (btmagic_ctl_send(sc, rep, sizeof(rep)) != 0) { 742 printf("%s: cannot enable touch reports\n", 743 device_xname(sc->sc_dev)); 744 745 return; 746 } 747 748 SET(sc->sc_flags, BTMAGIC_ENABLED); 749 } 750 751 /* 752 * Request the battery level by sending the following report 753 * 754 * GET_REPORT(FEATURE, 0x47) 755 * 756 * bt_lock is held 757 */ 758 static void 759 btmagic_check_battery(struct btmagic_softc *sc) 760 { 761 static const uint8_t rep[] = { 0x43, 0x47 }; 762 763 if (btmagic_ctl_send(sc, rep, sizeof(rep)) != 0) 764 printf("%s: cannot request battery level\n", 765 device_xname(sc->sc_dev)); 766 } 767 768 /* 769 * the Magic Mouse has a base resolution of 1300dpi which is rather flighty. We 770 * scale the output to the requested resolution, taking care to account for the 771 * remainders to prevent loss of small deltas. 772 */ 773 static int 774 btmagic_scale(int delta, int *remainder, int resolution) 775 { 776 int new; 777 778 delta += *remainder; 779 new = delta * resolution / 1300; 780 *remainder = delta - new * 1300 / resolution; 781 return new; 782 } 783 784 785 /***************************************************************************** 786 * 787 * bluetooth(9) callback methods for L2CAP 788 * 789 * All these are called from Bluetooth Protocol code, holding bt_lock. 790 */ 791 792 static void 793 btmagic_connecting(void *arg) 794 { 795 796 /* dont care */ 797 } 798 799 static void 800 btmagic_ctl_connected(void *arg) 801 { 802 struct sockaddr_bt sa; 803 struct btmagic_softc *sc = arg; 804 int err; 805 806 if (sc->sc_state != BTMAGIC_WAIT_CTL) 807 return; 808 809 KASSERT(sc->sc_ctl != NULL); 810 KASSERT(sc->sc_int == NULL); 811 812 if (ISSET(sc->sc_flags, BTMAGIC_CONNECTING)) { 813 /* initiate connect on interrupt PSM */ 814 err = l2cap_attach_pcb(&sc->sc_int, &btmagic_int_proto, sc); 815 if (err) 816 goto fail; 817 818 err = l2cap_setopt(sc->sc_int, &sc->sc_mode); 819 if (err) 820 goto fail; 821 822 memset(&sa, 0, sizeof(sa)); 823 sa.bt_len = sizeof(sa); 824 sa.bt_family = AF_BLUETOOTH; 825 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 826 827 err = l2cap_bind_pcb(sc->sc_int, &sa); 828 if (err) 829 goto fail; 830 831 sa.bt_psm = L2CAP_PSM_HID_INTR; 832 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 833 err = l2cap_connect_pcb(sc->sc_int, &sa); 834 if (err) 835 goto fail; 836 } 837 838 sc->sc_state = BTMAGIC_WAIT_INT; 839 return; 840 841 fail: 842 l2cap_detach_pcb(&sc->sc_ctl); 843 sc->sc_ctl = NULL; 844 845 printf("%s: connect failed (%d)\n", device_xname(sc->sc_dev), err); 846 } 847 848 static void 849 btmagic_int_connected(void *arg) 850 { 851 struct btmagic_softc *sc = arg; 852 853 if (sc->sc_state != BTMAGIC_WAIT_INT) 854 return; 855 856 KASSERT(sc->sc_ctl != NULL); 857 KASSERT(sc->sc_int != NULL); 858 859 printf("%s: connected\n", device_xname(sc->sc_dev)); 860 CLR(sc->sc_flags, BTMAGIC_CONNECTING); 861 sc->sc_state = BTMAGIC_OPEN; 862 863 /* trigger the setup */ 864 CLR(sc->sc_flags, BTMAGIC_ENABLED); 865 callout_schedule(&sc->sc_timeout, hz); 866 } 867 868 /* 869 * Disconnected 870 * 871 * Depending on our state, this could mean several things, but essentially 872 * we are lost. If both channels are closed, schedule another connection. 873 */ 874 static void 875 btmagic_ctl_disconnected(void *arg, int err) 876 { 877 struct btmagic_softc *sc = arg; 878 879 if (sc->sc_ctl != NULL) { 880 l2cap_detach_pcb(&sc->sc_ctl); 881 sc->sc_ctl = NULL; 882 } 883 884 if (sc->sc_int == NULL) { 885 printf("%s: disconnected (%d)\n", device_xname(sc->sc_dev), err); 886 CLR(sc->sc_flags, BTMAGIC_CONNECTING); 887 sc->sc_state = BTMAGIC_WAIT_CTL; 888 } else { 889 /* 890 * The interrupt channel should have been closed first, 891 * but its potentially unsafe to detach that from here. 892 * Give them a second to do the right thing or let the 893 * callout handle it. 894 */ 895 sc->sc_state = BTMAGIC_CLOSED; 896 callout_schedule(&sc->sc_timeout, hz); 897 } 898 } 899 900 static void 901 btmagic_int_disconnected(void *arg, int err) 902 { 903 struct btmagic_softc *sc = arg; 904 905 if (sc->sc_int != NULL) { 906 l2cap_detach_pcb(&sc->sc_int); 907 sc->sc_int = NULL; 908 } 909 910 if (sc->sc_ctl == NULL) { 911 printf("%s: disconnected (%d)\n", device_xname(sc->sc_dev), err); 912 CLR(sc->sc_flags, BTMAGIC_CONNECTING); 913 sc->sc_state = BTMAGIC_WAIT_CTL; 914 } else { 915 /* 916 * The control channel should be closing also, allow 917 * them a chance to do that before we force it. 918 */ 919 sc->sc_state = BTMAGIC_CLOSED; 920 callout_schedule(&sc->sc_timeout, hz); 921 } 922 } 923 924 /* 925 * New Connections 926 * 927 * We give a new L2CAP handle back if this matches the BDADDR we are 928 * listening for and we are in the right state. btmagic_connected will 929 * be called when the connection is open, so nothing else to do here 930 */ 931 static void * 932 btmagic_ctl_newconn(void *arg, struct sockaddr_bt *laddr, 933 struct sockaddr_bt *raddr) 934 { 935 struct btmagic_softc *sc = arg; 936 937 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) 938 return NULL; 939 940 if (sc->sc_state != BTMAGIC_WAIT_CTL 941 || ISSET(sc->sc_flags, BTMAGIC_CONNECTING) 942 || sc->sc_ctl != NULL 943 || sc->sc_int != NULL) { 944 DPRINTF(sc, "reject ctl newconn %s%s%s%s", 945 (sc->sc_state == BTMAGIC_WAIT_CTL) ? " (WAITING)": "", 946 ISSET(sc->sc_flags, BTMAGIC_CONNECTING) ? " (CONNECTING)" : "", 947 (sc->sc_ctl != NULL) ? " (GOT CONTROL)" : "", 948 (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : ""); 949 950 return NULL; 951 } 952 953 l2cap_attach_pcb(&sc->sc_ctl, &btmagic_ctl_proto, sc); 954 return sc->sc_ctl; 955 } 956 957 static void * 958 btmagic_int_newconn(void *arg, struct sockaddr_bt *laddr, 959 struct sockaddr_bt *raddr) 960 { 961 struct btmagic_softc *sc = arg; 962 963 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0) 964 return NULL; 965 966 if (sc->sc_state != BTMAGIC_WAIT_INT 967 || ISSET(sc->sc_flags, BTMAGIC_CONNECTING) 968 || sc->sc_ctl == NULL 969 || sc->sc_int != NULL) { 970 DPRINTF(sc, "reject int newconn %s%s%s%s", 971 (sc->sc_state == BTMAGIC_WAIT_INT) ? " (WAITING)": "", 972 ISSET(sc->sc_flags, BTMAGIC_CONNECTING) ? " (CONNECTING)" : "", 973 (sc->sc_ctl == NULL) ? " (NO CONTROL)" : "", 974 (sc->sc_int != NULL) ? " (GOT INTERRUPT)" : ""); 975 976 return NULL; 977 } 978 979 l2cap_attach_pcb(&sc->sc_int, &btmagic_int_proto, sc); 980 return sc->sc_int; 981 } 982 983 static void 984 btmagic_complete(void *arg, int count) 985 { 986 987 /* dont care */ 988 } 989 990 static void 991 btmagic_linkmode(void *arg, int new) 992 { 993 struct btmagic_softc *sc = arg; 994 int mode; 995 996 (void)sockopt_getint(&sc->sc_mode, &mode); 997 998 if (ISSET(mode, L2CAP_LM_AUTH) && !ISSET(new, L2CAP_LM_AUTH)) 999 printf("%s: auth failed\n", device_xname(sc->sc_dev)); 1000 else if (ISSET(mode, L2CAP_LM_ENCRYPT) && !ISSET(new, L2CAP_LM_ENCRYPT)) 1001 printf("%s: encrypt off\n", device_xname(sc->sc_dev)); 1002 else if (ISSET(mode, L2CAP_LM_SECURE) && !ISSET(new, L2CAP_LM_SECURE)) 1003 printf("%s: insecure\n", device_xname(sc->sc_dev)); 1004 else 1005 return; 1006 1007 if (sc->sc_int != NULL) 1008 l2cap_disconnect_pcb(sc->sc_int, 0); 1009 1010 if (sc->sc_ctl != NULL) 1011 l2cap_disconnect_pcb(sc->sc_ctl, 0); 1012 } 1013 1014 /* 1015 * Receive transaction from the mouse. We don't differentiate between 1016 * interrupt and control channel here, there is no need. 1017 */ 1018 static void 1019 btmagic_input(void *arg, struct mbuf *m) 1020 { 1021 struct btmagic_softc *sc = arg; 1022 uint8_t *data; 1023 size_t len; 1024 1025 if (sc->sc_state != BTMAGIC_OPEN 1026 || sc->sc_wsmouse == NULL 1027 || sc->sc_enabled == 0) 1028 goto release; 1029 1030 if (m->m_pkthdr.len > m->m_len) 1031 printf("%s: truncating input\n", device_xname(sc->sc_dev)); 1032 1033 data = mtod(m, uint8_t *); 1034 len = m->m_len; 1035 1036 if (len < 1) 1037 goto release; 1038 1039 switch (BTHID_TYPE(data[0])) { 1040 case BTHID_HANDSHAKE: 1041 DPRINTF(sc, "Handshake: 0x%x", BTHID_HANDSHAKE_PARAM(data[0])); 1042 callout_schedule(&sc->sc_timeout, hz); 1043 break; 1044 1045 case BTHID_DATA: 1046 if (len < 2) 1047 break; 1048 1049 switch (data[1]) { 1050 case 0x10: /* Basic mouse (input) */ 1051 btmagic_input_basic(sc, data + 2, len - 2); 1052 break; 1053 1054 case 0x29: /* Magic touch (input) */ 1055 btmagic_input_magic(sc, data + 2, len - 2); 1056 break; 1057 1058 case 0x30: /* Battery status (input) */ 1059 if (len != 3) 1060 break; 1061 1062 printf("%s: Battery ", device_xname(sc->sc_dev)); 1063 switch (data[2]) { 1064 case 0: printf("Ok\n"); break; 1065 case 1: printf("Warning\n"); break; 1066 case 2: printf("Critical\n"); break; 1067 default: printf("0x%02x\n", data[2]); break; 1068 } 1069 break; 1070 1071 case 0x47: /* Battery strength (feature) */ 1072 if (len != 3) 1073 break; 1074 1075 printf("%s: Battery %d%%\n", device_xname(sc->sc_dev), 1076 data[2]); 1077 break; 1078 1079 case 0x61: /* Surface detection (input) */ 1080 if (len != 3) 1081 break; 1082 1083 DPRINTF(sc, "Mouse %s", 1084 (data[2] == 0 ? "lowered" : "raised")); 1085 break; 1086 1087 case 0x60: /* unknown (input) */ 1088 case 0xf0: /* unknown (feature) */ 1089 case 0xf1: /* unknown (feature) */ 1090 default: 1091 #if BTMAGIC_DEBUG 1092 printf("%s: recv", device_xname(sc->sc_dev)); 1093 for (size_t i = 0; i < len; i++) 1094 printf(" 0x%02x", data[i]); 1095 printf("\n"); 1096 #endif 1097 break; 1098 } 1099 break; 1100 1101 default: 1102 DPRINTF(sc, "transaction (type 0x%x)", BTHID_TYPE(data[0])); 1103 break; 1104 } 1105 1106 release: 1107 m_freem(m); 1108 } 1109 1110 /* 1111 * parse the Basic report (0x10), which according to the provided 1112 * HID descriptor is in the following format 1113 * 1114 * button 1 1-bit 1115 * button 2 1-bit 1116 * padding 6-bits 1117 * dX 16-bits (signed) 1118 * dY 16-bits (signed) 1119 * 1120 * Even when the magic touch reports are enabled, the basic report is 1121 * sent for mouse move events where no touches are detected. 1122 */ 1123 static const struct { 1124 struct hid_location button1; 1125 struct hid_location button2; 1126 struct hid_location dX; 1127 struct hid_location dY; 1128 } basic = { 1129 .button1 = { .pos = 0, .size = 1 }, 1130 .button2 = { .pos = 1, .size = 1 }, 1131 .dX = { .pos = 8, .size = 16 }, 1132 .dY = { .pos = 24, .size = 16 }, 1133 }; 1134 1135 static void 1136 btmagic_input_basic(struct btmagic_softc *sc, uint8_t *data, size_t len) 1137 { 1138 int dx, dy; 1139 uint32_t mb; 1140 int s; 1141 1142 if (len != 5) 1143 return; 1144 1145 dx = hid_get_data(data, &basic.dX); 1146 dx = btmagic_scale(dx, &sc->sc_rx, sc->sc_resolution); 1147 1148 dy = hid_get_data(data, &basic.dY); 1149 dy = btmagic_scale(dy, &sc->sc_ry, sc->sc_resolution); 1150 1151 mb = 0; 1152 if (hid_get_udata(data, &basic.button1)) 1153 mb |= __BIT(0); 1154 if (hid_get_udata(data, &basic.button2)) 1155 mb |= __BIT(2); 1156 1157 if (dx != 0 || dy != 0 || mb != sc->sc_mb) { 1158 sc->sc_mb = mb; 1159 1160 s = spltty(); 1161 wsmouse_input(sc->sc_wsmouse, mb, 1162 dx, -dy, 0, 0, WSMOUSE_INPUT_DELTA); 1163 splx(s); 1164 } 1165 } 1166 1167 /* 1168 * the Magic touch report (0x29), according to the Linux driver 1169 * written by Michael Poole, is variable length starting with the 1170 * fixed 40-bit header 1171 * 1172 * dX lsb 8-bits (signed) 1173 * dY lsb 8-bits (signed) 1174 * button 1 1-bit 1175 * button 2 1-bit 1176 * dX msb 2-bits (signed) 1177 * dY msb 2-bits (signed) 1178 * timestamp 18-bits 1179 * 1180 * followed by (up to 5?) touch reports of 64-bits each 1181 * 1182 * abs W 12-bits (signed) 1183 * abs Z 12-bits (signed) 1184 * axis major 8-bits 1185 * axis minor 8-bits 1186 * pressure 6-bits 1187 * id 4-bits 1188 * angle 6-bits (from E(0)->N(32)->W(64)) 1189 * unknown 4-bits 1190 * phase 4-bits 1191 */ 1192 1193 static const struct { 1194 struct hid_location dXl; 1195 struct hid_location dYl; 1196 struct hid_location button1; 1197 struct hid_location button2; 1198 struct hid_location dXm; 1199 struct hid_location dYm; 1200 struct hid_location timestamp; 1201 } magic = { 1202 .dXl = { .pos = 0, .size = 8 }, 1203 .dYl = { .pos = 8, .size = 8 }, 1204 .button1 = { .pos = 16, .size = 1 }, 1205 .button2 = { .pos = 17, .size = 1 }, 1206 .dXm = { .pos = 18, .size = 2 }, 1207 .dYm = { .pos = 20, .size = 2 }, 1208 .timestamp = { .pos = 22, .size = 18 }, 1209 }; 1210 1211 static const struct { 1212 struct hid_location aW; 1213 struct hid_location aZ; 1214 struct hid_location major; 1215 struct hid_location minor; 1216 struct hid_location pressure; 1217 struct hid_location id; 1218 struct hid_location angle; 1219 struct hid_location unknown; 1220 struct hid_location phase; 1221 } touch = { 1222 .aW = { .pos = 0, .size = 12 }, 1223 .aZ = { .pos = 12, .size = 12 }, 1224 .major = { .pos = 24, .size = 8 }, 1225 .minor = { .pos = 32, .size = 8 }, 1226 .pressure = { .pos = 40, .size = 6 }, 1227 .id = { .pos = 46, .size = 4 }, 1228 .angle = { .pos = 50, .size = 6 }, 1229 .unknown = { .pos = 56, .size = 4 }, 1230 .phase = { .pos = 60, .size = 4 }, 1231 }; 1232 1233 /* 1234 * the phase of the touch starts at 0x01 as the finger is first detected 1235 * approaching the mouse, increasing to 0x04 while the finger is touching, 1236 * then increases towards 0x07 as the finger is lifted, and we get 0x00 1237 * when the touch is cancelled. The values below seem to be produced for 1238 * every touch, the others less consistently depending on how fast the 1239 * approach or departure is. 1240 * 1241 * In fact we ignore touches unless they are in the steady 0x04 phase. 1242 */ 1243 #define BTMAGIC_PHASE_START 0x3 1244 #define BTMAGIC_PHASE_CONT 0x4 1245 #define BTMAGIC_PHASE_END 0x7 1246 #define BTMAGIC_PHASE_CANCEL 0x0 1247 1248 static void 1249 btmagic_input_magic(struct btmagic_softc *sc, uint8_t *data, size_t len) 1250 { 1251 uint32_t mb; 1252 int dx, dy, dz, dw; 1253 int id, nf, az, aw, tz, tw; 1254 int s; 1255 1256 if (((len - 5) % 8) != 0) 1257 return; 1258 1259 dx = (hid_get_data(data, &magic.dXm) << 8) 1260 | (hid_get_data(data, &magic.dXl) & 0xff); 1261 dx = btmagic_scale(dx, &sc->sc_rx, sc->sc_resolution); 1262 1263 dy = (hid_get_data(data, &magic.dYm) << 8) 1264 | (hid_get_data(data, &magic.dYl) & 0xff); 1265 dy = btmagic_scale(dy, &sc->sc_ry, sc->sc_resolution); 1266 1267 mb = 0; 1268 if (hid_get_udata(data, &magic.button1)) 1269 mb |= __BIT(0); 1270 if (hid_get_udata(data, &magic.button2)) 1271 mb |= __BIT(2); 1272 1273 nf = 0; 1274 dz = 0; 1275 dw = 0; 1276 len = (len - 5) / 8; 1277 for (data += 5; len-- > 0; data += 8) { 1278 id = hid_get_udata(data, &touch.id); 1279 az = hid_get_data(data, &touch.aZ); 1280 aw = hid_get_data(data, &touch.aW); 1281 1282 /* 1283 * scrolling is triggered by an established touch moving 1284 * beyond a minimum distance from its start point and is 1285 * cancelled as the touch starts to fade. 1286 * 1287 * Multiple touches may be scrolling simultaneously, the 1288 * effect is cumulative. 1289 */ 1290 1291 switch (hid_get_udata(data, &touch.phase)) { 1292 case BTMAGIC_PHASE_CONT: 1293 tz = az - sc->sc_az[id]; 1294 tw = aw - sc->sc_aw[id]; 1295 1296 if (ISSET(sc->sc_smask, id)) { 1297 /* scrolling finger */ 1298 dz += btmagic_scale(tz, &sc->sc_rz, 1299 sc->sc_resolution / sc->sc_scale); 1300 dw += btmagic_scale(tw, &sc->sc_rw, 1301 sc->sc_resolution / sc->sc_scale); 1302 } else if (abs(tz) > sc->sc_dist 1303 || abs(tw) > sc->sc_dist) { 1304 /* new scrolling finger */ 1305 if (sc->sc_smask == 0) { 1306 sc->sc_rz = 0; 1307 sc->sc_rw = 0; 1308 } 1309 1310 SET(sc->sc_smask, id); 1311 } else { 1312 /* not scrolling finger */ 1313 az = sc->sc_az[id]; 1314 aw = sc->sc_aw[id]; 1315 } 1316 1317 /* count firm touches for middle-click */ 1318 if (hid_get_udata(data, &touch.pressure) > sc->sc_firm) 1319 nf++; 1320 1321 break; 1322 1323 default: 1324 CLR(sc->sc_smask, id); 1325 break; 1326 } 1327 1328 sc->sc_az[id] = az; 1329 sc->sc_aw[id] = aw; 1330 } 1331 1332 /* 1333 * The mouse only has one click detector, and says left or right but 1334 * never both. We convert multiple firm touches while clicking into 1335 * a middle button press, and cancel any scroll effects while click 1336 * is active. 1337 */ 1338 if (mb != 0) { 1339 if (sc->sc_mb != 0) 1340 mb = sc->sc_mb; 1341 else if (nf > 1) 1342 mb = __BIT(1); 1343 1344 sc->sc_smask = 0; 1345 dz = 0; 1346 dw = 0; 1347 } 1348 1349 if (dx != 0 || dy != 0 || dz != 0 || dw != 0 || mb != sc->sc_mb) { 1350 sc->sc_mb = mb; 1351 1352 s = spltty(); 1353 wsmouse_input(sc->sc_wsmouse, mb, 1354 dx, -dy, -dz, dw, WSMOUSE_INPUT_DELTA); 1355 splx(s); 1356 } 1357 } 1358
Indexes created Tue Sep 30 11:09:46 GMT 2025