Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/adb/adb_mouse.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 2008 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/lock.h> 34 #include <sys/module.h> 35 #include <sys/mutex.h> 36 #include <sys/bus.h> 37 #include <sys/conf.h> 38 #include <sys/mouse.h> 39 #include <sys/poll.h> 40 #include <sys/condvar.h> 41 #include <sys/selinfo.h> 42 #include <sys/sysctl.h> 43 #include <sys/uio.h> 44 #include <sys/fcntl.h> 45 #include <sys/kernel.h> 46 47 #include <machine/bus.h> 48 49 #include <vm/vm.h> 50 #include <vm/pmap.h> 51 52 #include "adb.h" 53 54 #define CDEV_GET_SOFTC(x) (x)->si_drv1 55 56 static int adb_mouse_probe(device_t dev); 57 static int adb_mouse_attach(device_t dev); 58 static int adb_mouse_detach(device_t dev); 59 static void adb_init_trackpad(device_t dev); 60 static int adb_tapping_sysctl(SYSCTL_HANDLER_ARGS); 61 62 static d_open_t ams_open; 63 static d_close_t ams_close; 64 static d_read_t ams_read; 65 static d_ioctl_t ams_ioctl; 66 static d_poll_t ams_poll; 67 68 static u_int adb_mouse_receive_packet(device_t dev, u_char status, 69 u_char command, u_char reg, int len, u_char *data); 70 71 struct adb_mouse_softc { 72 device_t sc_dev; 73 74 struct mtx sc_mtx; 75 struct cv sc_cv; 76 77 int flags; 78 #define AMS_EXTENDED 0x1 79 #define AMS_TOUCHPAD 0x2 80 uint16_t dpi; 81 82 mousehw_t hw; 83 mousemode_t mode; 84 u_char id[4]; 85 86 int buttons; 87 u_int sc_tapping; 88 int button_buf; 89 int last_buttons; 90 int xdelta, ydelta; 91 92 int8_t packet[8]; 93 size_t packet_read_len; 94 95 struct cdev *cdev; 96 struct selinfo rsel; 97 }; 98 99 static device_method_t adb_mouse_methods[] = { 100 /* Device interface */ 101 DEVMETHOD(device_probe, adb_mouse_probe), 102 DEVMETHOD(device_attach, adb_mouse_attach), 103 DEVMETHOD(device_detach, adb_mouse_detach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 DEVMETHOD(device_suspend, bus_generic_suspend), 106 DEVMETHOD(device_resume, bus_generic_resume), 107 108 /* ADB interface */ 109 DEVMETHOD(adb_receive_packet, adb_mouse_receive_packet), 110 { 0, 0 } 111 }; 112 113 static driver_t adb_mouse_driver = { 114 "ams", 115 adb_mouse_methods, 116 sizeof(struct adb_mouse_softc), 117 }; 118 119 DRIVER_MODULE(ams, adb, adb_mouse_driver, 0, 0); 120 121 static struct cdevsw ams_cdevsw = { 122 .d_version = D_VERSION, 123 .d_flags = 0, 124 .d_open = ams_open, 125 .d_close = ams_close, 126 .d_read = ams_read, 127 .d_ioctl = ams_ioctl, 128 .d_poll = ams_poll, 129 .d_name = "ams", 130 }; 131 132 static int 133 adb_mouse_probe(device_t dev) 134 { 135 uint8_t type; 136 137 type = adb_get_device_type(dev); 138 139 if (type != ADB_DEVICE_MOUSE) 140 return (ENXIO); 141 142 device_set_desc(dev,"ADB Mouse"); 143 return (0); 144 } 145 146 static int 147 adb_mouse_attach(device_t dev) 148 { 149 struct adb_mouse_softc *sc; 150 char *description = "Unknown Pointing Device"; 151 152 size_t r1_len; 153 u_char r1[8]; 154 155 sc = device_get_softc(dev); 156 sc->sc_dev = dev; 157 158 mtx_init(&sc->sc_mtx, "ams", NULL, MTX_DEF); 159 cv_init(&sc->sc_cv,"ams"); 160 161 sc->flags = 0; 162 163 sc->hw.buttons = 2; 164 sc->hw.iftype = MOUSE_IF_UNKNOWN; 165 sc->hw.type = MOUSE_UNKNOWN; 166 sc->hw.model = sc->hw.hwid = 0; 167 168 sc->mode.protocol = MOUSE_PROTO_SYSMOUSE; 169 sc->mode.rate = -1; 170 sc->mode.resolution = 100; 171 sc->mode.accelfactor = 0; 172 sc->mode.level = 0; 173 sc->mode.packetsize = 5; 174 175 sc->buttons = 0; 176 sc->sc_tapping = 0; 177 sc->button_buf = 0; 178 sc->last_buttons = 0; 179 sc->packet_read_len = 0; 180 181 /* Try to switch to extended protocol */ 182 adb_set_device_handler(dev,4); 183 184 switch(adb_get_device_handler(dev)) { 185 case 1: 186 sc->mode.resolution = 100; 187 break; 188 case 2: 189 sc->mode.resolution = 200; 190 break; 191 case 4: 192 r1_len = adb_read_register(dev,1,r1); 193 if (r1_len < 8) 194 break; 195 196 sc->flags |= AMS_EXTENDED; 197 memcpy(&sc->hw.hwid,r1,4); 198 sc->mode.resolution = (r1[4] << 8) | r1[5]; 199 200 switch (r1[6]) { 201 case 0: 202 sc->hw.type = MOUSE_PAD; 203 description = "Tablet"; 204 break; 205 case 1: 206 sc->hw.type = MOUSE_MOUSE; 207 description = "Mouse"; 208 break; 209 case 2: 210 sc->hw.type = MOUSE_TRACKBALL; 211 description = "Trackball"; 212 break; 213 case 3: 214 sc->flags |= AMS_TOUCHPAD; 215 sc->hw.type = MOUSE_PAD; 216 adb_init_trackpad(dev); 217 description = "Touchpad"; 218 break; 219 } 220 221 sc->hw.buttons = r1[7]; 222 223 device_printf(dev,"%d-button %d-dpi %s\n", 224 sc->hw.buttons, sc->mode.resolution,description); 225 226 /* 227 * Check for one of MacAlly's non-compliant 2-button mice. 228 * These claim to speak the extended mouse protocol, but 229 * instead speak the standard protocol and only when their 230 * handler is set to 0x42. 231 */ 232 233 if (sc->hw.hwid == 0x4b4f4954) { 234 adb_set_device_handler(dev,0x42); 235 236 if (adb_get_device_handler(dev) == 0x42) { 237 device_printf(dev, "MacAlly 2-Button Mouse\n"); 238 sc->flags &= ~AMS_EXTENDED; 239 } 240 } 241 242 break; 243 } 244 245 sc->cdev = make_dev(&ams_cdevsw, device_get_unit(dev), 246 UID_ROOT, GID_OPERATOR, 0644, "ams%d", 247 device_get_unit(dev)); 248 sc->cdev->si_drv1 = sc; 249 250 adb_set_autopoll(dev,1); 251 252 return (0); 253 } 254 255 static int 256 adb_mouse_detach(device_t dev) 257 { 258 struct adb_mouse_softc *sc; 259 260 adb_set_autopoll(dev,0); 261 262 sc = device_get_softc(dev); 263 destroy_dev(sc->cdev); 264 265 mtx_destroy(&sc->sc_mtx); 266 cv_destroy(&sc->sc_cv); 267 268 return (0); 269 } 270 271 static void 272 adb_init_trackpad(device_t dev) 273 { 274 struct adb_mouse_softc *sc; 275 struct sysctl_ctx_list *ctx; 276 struct sysctl_oid *tree; 277 278 size_t r1_len; 279 u_char r1[8]; 280 u_char r2[8]; 281 282 sc = device_get_softc(dev); 283 284 r1_len = adb_read_register(dev, 1, r1); 285 286 /* An Extended Mouse register1 must return 8 bytes. */ 287 if (r1_len != 8) 288 return; 289 290 if((r1[6] != 0x0d)) 291 { 292 r1[6] = 0x0d; 293 294 adb_write_register(dev, 1, 8, r1); 295 296 r1_len = adb_read_register(dev, 1, r1); 297 298 if (r1[6] != 0x0d) 299 { 300 device_printf(dev, "ADB Mouse = 0x%x " 301 "(non-Extended Mode)\n", r1[6]); 302 return; 303 } else { 304 device_printf(dev, "ADB Mouse = 0x%x " 305 "(Extended Mode)\n", r1[6]); 306 307 /* Set ADB Extended Features to default values, 308 enabled. */ 309 r2[0] = 0x19; /* Clicking: 0x19 disabled 0x99 enabled */ 310 r2[1] = 0x94; /* Dragging: 0x14 disabled 0x94 enabled */ 311 r2[2] = 0x19; 312 r2[3] = 0xff; /* DragLock: 0xff disabled 0xb2 enabled */ 313 r2[4] = 0xb2; 314 r2[5] = 0x8a; 315 r2[6] = 0x1b; 316 317 r2[7] = 0x57; /* 0x57 bits 3:0 for W mode */ 318 319 adb_write_register(dev, 2, 8, r2); 320 321 } 322 } 323 324 /* 325 * Set up sysctl 326 */ 327 ctx = device_get_sysctl_ctx(dev); 328 tree = device_get_sysctl_tree(dev); 329 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tapping", 330 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0, 331 adb_tapping_sysctl, "I", "Tapping the pad causes button events"); 332 return; 333 } 334 335 static u_int 336 adb_mouse_receive_packet(device_t dev, u_char status, u_char command, 337 u_char reg, int len, u_char *data) 338 { 339 struct adb_mouse_softc *sc; 340 int i = 0; 341 int xdelta, ydelta; 342 int buttons, tmp_buttons; 343 344 sc = device_get_softc(dev); 345 346 if (command != ADB_COMMAND_TALK || reg != 0 || len < 2) 347 return (0); 348 349 ydelta = data[0] & 0x7f; 350 xdelta = data[1] & 0x7f; 351 352 buttons = 0; 353 buttons |= !(data[0] & 0x80); 354 buttons |= !(data[1] & 0x80) << 1; 355 356 if (sc->flags & AMS_EXTENDED) { 357 for (i = 2; i < len && i < 5; i++) { 358 xdelta |= (data[i] & 0x07) << (3*i + 1); 359 ydelta |= (data[i] & 0x70) << (3*i - 3); 360 361 buttons |= !(data[i] & 0x08) << (2*i - 2); 362 buttons |= !(data[i] & 0x80) << (2*i - 1); 363 } 364 } else { 365 len = 2; /* Ignore extra data */ 366 } 367 368 /* Do sign extension as necessary */ 369 if (xdelta & (0x40 << 3*(len-2))) 370 xdelta |= 0xffffffc0 << 3*(len - 2); 371 if (ydelta & (0x40 << 3*(len-2))) 372 ydelta |= 0xffffffc0 << 3*(len - 2); 373 374 if ((sc->flags & AMS_TOUCHPAD) && (sc->sc_tapping == 1)) { 375 tmp_buttons = buttons; 376 if (buttons == 0x12) { 377 /* Map a double tap on button 3. 378 Keep the button state for the next sequence. 379 A double tap sequence is followed by a single tap 380 sequence. 381 */ 382 tmp_buttons = 0x3; 383 sc->button_buf = tmp_buttons; 384 } else if (buttons == 0x2) { 385 /* Map a single tap on button 2. But only if it is 386 not a successor from a double tap. 387 */ 388 if (sc->button_buf != 0x3) 389 tmp_buttons = 0x2; 390 else 391 tmp_buttons = 0; 392 393 sc->button_buf = 0; 394 } 395 buttons = tmp_buttons; 396 } 397 398 /* 399 * Some mice report high-numbered buttons on the wrong button number, 400 * so set the highest-numbered real button as pressed if there are 401 * mysterious high-numbered ones set. 402 * 403 * Don't do this for touchpads, because touchpads also trigger 404 * high button events when they are touched. 405 */ 406 407 if (rounddown2(buttons, 1 << sc->hw.buttons) 408 && !(sc->flags & AMS_TOUCHPAD)) { 409 buttons |= 1 << (sc->hw.buttons - 1); 410 } 411 buttons &= (1 << sc->hw.buttons) - 1; 412 413 mtx_lock(&sc->sc_mtx); 414 415 /* Add in our new deltas, and take into account 416 Apple's opposite meaning for Y axis motion */ 417 418 sc->xdelta += xdelta; 419 sc->ydelta -= ydelta; 420 421 sc->buttons = buttons; 422 423 mtx_unlock(&sc->sc_mtx); 424 425 cv_broadcast(&sc->sc_cv); 426 selwakeuppri(&sc->rsel, PZERO); 427 428 return (0); 429 } 430 431 static int 432 ams_open(struct cdev *dev, int flag, int fmt, struct thread *p) 433 { 434 struct adb_mouse_softc *sc; 435 436 sc = CDEV_GET_SOFTC(dev); 437 if (sc == NULL) 438 return (ENXIO); 439 440 mtx_lock(&sc->sc_mtx); 441 sc->packet_read_len = 0; 442 sc->xdelta = 0; 443 sc->ydelta = 0; 444 sc->buttons = 0; 445 mtx_unlock(&sc->sc_mtx); 446 447 return (0); 448 } 449 450 static int 451 ams_close(struct cdev *dev, int flag, int fmt, struct thread *p) 452 { 453 struct adb_mouse_softc *sc; 454 455 sc = CDEV_GET_SOFTC(dev); 456 457 cv_broadcast(&sc->sc_cv); 458 selwakeuppri(&sc->rsel, PZERO); 459 return (0); 460 } 461 462 static int 463 ams_poll(struct cdev *dev, int events, struct thread *p) 464 { 465 struct adb_mouse_softc *sc; 466 467 sc = CDEV_GET_SOFTC(dev); 468 if (sc == NULL) 469 return (EIO); 470 471 if (events & (POLLIN | POLLRDNORM)) { 472 mtx_lock(&sc->sc_mtx); 473 474 if (sc->xdelta == 0 && sc->ydelta == 0 && 475 sc->buttons == sc->last_buttons && 476 sc->packet_read_len == 0) { 477 selrecord(p, &sc->rsel); 478 events = 0; 479 } else { 480 events &= (POLLIN | POLLRDNORM); 481 } 482 483 mtx_unlock(&sc->sc_mtx); 484 } 485 486 return events; 487 } 488 489 static int 490 ams_read(struct cdev *dev, struct uio *uio, int flag) 491 { 492 struct adb_mouse_softc *sc; 493 size_t len; 494 int8_t outpacket[8]; 495 int error; 496 497 sc = CDEV_GET_SOFTC(dev); 498 if (sc == NULL) 499 return (EIO); 500 501 if (uio->uio_resid <= 0) 502 return (0); 503 504 mtx_lock(&sc->sc_mtx); 505 506 if (!sc->packet_read_len) { 507 if (sc->xdelta == 0 && sc->ydelta == 0 && 508 sc->buttons == sc->last_buttons) { 509 if (flag & O_NONBLOCK) { 510 mtx_unlock(&sc->sc_mtx); 511 return EWOULDBLOCK; 512 } 513 514 /* Otherwise, block on new data */ 515 error = cv_wait_sig(&sc->sc_cv, &sc->sc_mtx); 516 if (error) { 517 mtx_unlock(&sc->sc_mtx); 518 return (error); 519 } 520 } 521 522 sc->packet[0] = 1U << 7; 523 sc->packet[0] |= (!(sc->buttons & 1)) << 2; 524 sc->packet[0] |= (!(sc->buttons & 4)) << 1; 525 sc->packet[0] |= (!(sc->buttons & 2)); 526 527 if (sc->xdelta > 127) { 528 sc->packet[1] = 127; 529 sc->packet[3] = sc->xdelta - 127; 530 } else if (sc->xdelta < -127) { 531 sc->packet[1] = -127; 532 sc->packet[3] = sc->xdelta + 127; 533 } else { 534 sc->packet[1] = sc->xdelta; 535 sc->packet[3] = 0; 536 } 537 538 if (sc->ydelta > 127) { 539 sc->packet[2] = 127; 540 sc->packet[4] = sc->ydelta - 127; 541 } else if (sc->ydelta < -127) { 542 sc->packet[2] = -127; 543 sc->packet[4] = sc->ydelta + 127; 544 } else { 545 sc->packet[2] = sc->ydelta; 546 sc->packet[4] = 0; 547 } 548 549 /* No Z movement */ 550 sc->packet[5] = 0; 551 sc->packet[6] = 0; 552 553 sc->packet[7] = ~((uint8_t)(sc->buttons >> 3)) & 0x7f; 554 555 sc->last_buttons = sc->buttons; 556 sc->xdelta = 0; 557 sc->ydelta = 0; 558 559 sc->packet_read_len = sc->mode.packetsize; 560 } 561 562 len = (sc->packet_read_len > uio->uio_resid) ? 563 uio->uio_resid : sc->packet_read_len; 564 565 memcpy(outpacket,sc->packet + 566 (sc->mode.packetsize - sc->packet_read_len),len); 567 sc->packet_read_len -= len; 568 569 mtx_unlock(&sc->sc_mtx); 570 571 error = uiomove(outpacket,len,uio); 572 573 return (error); 574 } 575 576 static int 577 ams_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, 578 struct thread *p) 579 { 580 struct adb_mouse_softc *sc; 581 mousemode_t mode; 582 583 sc = CDEV_GET_SOFTC(dev); 584 if (sc == NULL) 585 return (EIO); 586 587 switch (cmd) { 588 case MOUSE_GETHWINFO: 589 *(mousehw_t *)addr = sc->hw; 590 break; 591 case MOUSE_GETMODE: 592 *(mousemode_t *)addr = sc->mode; 593 break; 594 case MOUSE_SETMODE: 595 mode = *(mousemode_t *)addr; 596 addr = (caddr_t)&mode.level; 597 598 /* Fallthrough */ 599 600 case MOUSE_SETLEVEL: 601 if (*(int *)addr == -1) 602 break; 603 else if (*(int *)addr == 1) { 604 sc->mode.level = 1; 605 sc->mode.packetsize = 8; 606 break; 607 } else if (*(int *)addr == 0) { 608 sc->mode.level = 0; 609 sc->mode.packetsize = 5; 610 break; 611 } 612 613 return EINVAL; 614 case MOUSE_GETLEVEL: 615 *(int *)addr = sc->mode.level; 616 break; 617 618 case MOUSE_GETSTATUS: { 619 mousestatus_t *status = (mousestatus_t *) addr; 620 621 mtx_lock(&sc->sc_mtx); 622 623 status->button = sc->buttons; 624 status->obutton = sc->last_buttons; 625 626 status->flags = status->button ^ status->obutton; 627 628 if (sc->xdelta != 0 || sc->ydelta) 629 status->flags |= MOUSE_POSCHANGED; 630 if (status->button != status->obutton) 631 status->flags |= MOUSE_BUTTONSCHANGED; 632 633 status->dx = sc->xdelta; 634 status->dy = sc->ydelta; 635 status->dz = 0; 636 637 sc->xdelta = 0; 638 sc->ydelta = 0; 639 sc->last_buttons = sc->buttons; 640 641 mtx_unlock(&sc->sc_mtx); 642 break; } 643 default: 644 return ENOTTY; 645 } 646 647 return (0); 648 } 649 650 static int 651 adb_tapping_sysctl(SYSCTL_HANDLER_ARGS) 652 { 653 struct adb_mouse_softc *sc = arg1; 654 device_t dev; 655 int error; 656 u_char r2[8]; 657 u_int tapping; 658 659 dev = sc->sc_dev; 660 tapping = sc->sc_tapping; 661 662 error = sysctl_handle_int(oidp, &tapping, 0, req); 663 664 if (error || !req->newptr) 665 return (error); 666 667 if (tapping == 1) { 668 adb_read_register(dev, 2, r2); 669 r2[0] = 0x99; /* enable tapping. */ 670 adb_write_register(dev, 2, 8, r2); 671 sc->sc_tapping = 1; 672 } else if (tapping == 0) { 673 adb_read_register(dev, 2, r2); 674 r2[0] = 0x19; /* disable tapping. */ 675 adb_write_register(dev, 2, 8, r2); 676 sc->sc_tapping = 0; 677 } 678 else 679 return (EINVAL); 680 681 return (0); 682 }
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