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/module.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/mouse.h> 37 #include <sys/poll.h> 38 #include <sys/condvar.h> 39 #include <sys/selinfo.h> 40 #include <sys/sysctl.h> 41 #include <sys/uio.h> 42 #include <sys/fcntl.h> 43 #include <sys/kernel.h> 44 45 #include <machine/bus.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #include "adb.h" 51 52 #define CDEV_GET_SOFTC(x) (x)->si_drv1 53 54 static int adb_mouse_probe(device_t dev); 55 static int adb_mouse_attach(device_t dev); 56 static int adb_mouse_detach(device_t dev); 57 static void adb_init_trackpad(device_t dev); 58 static int adb_tapping_sysctl(SYSCTL_HANDLER_ARGS); 59 60 static d_open_t ams_open; 61 static d_close_t ams_close; 62 static d_read_t ams_read; 63 static d_ioctl_t ams_ioctl; 64 static d_poll_t ams_poll; 65 66 static u_int adb_mouse_receive_packet(device_t dev, u_char status, 67 u_char command, u_char reg, int len, u_char *data); 68 69 struct adb_mouse_softc { 70 device_t sc_dev; 71 72 struct mtx sc_mtx; 73 struct cv sc_cv; 74 75 int flags; 76 #define AMS_EXTENDED 0x1 77 #define AMS_TOUCHPAD 0x2 78 uint16_t dpi; 79 80 mousehw_t hw; 81 mousemode_t mode; 82 u_char id[4]; 83 84 int buttons; 85 u_int sc_tapping; 86 int button_buf; 87 int last_buttons; 88 int xdelta, ydelta; 89 90 int8_t packet[8]; 91 size_t packet_read_len; 92 93 struct cdev *cdev; 94 struct selinfo rsel; 95 }; 96 97 static device_method_t adb_mouse_methods[] = { 98 /* Device interface */ 99 DEVMETHOD(device_probe, adb_mouse_probe), 100 DEVMETHOD(device_attach, adb_mouse_attach), 101 DEVMETHOD(device_detach, adb_mouse_detach), 102 DEVMETHOD(device_shutdown, bus_generic_shutdown), 103 DEVMETHOD(device_suspend, bus_generic_suspend), 104 DEVMETHOD(device_resume, bus_generic_resume), 105 106 /* ADB interface */ 107 DEVMETHOD(adb_receive_packet, adb_mouse_receive_packet), 108 109 { 0, 0 } 110 }; 111 112 static driver_t adb_mouse_driver = { 113 "ams", 114 adb_mouse_methods, 115 sizeof(struct adb_mouse_softc), 116 }; 117 118 static devclass_t adb_mouse_devclass; 119 120 DRIVER_MODULE(ams, adb, adb_mouse_driver, adb_mouse_devclass, 0, 0); 121 122 static struct cdevsw ams_cdevsw = { 123 .d_version = D_VERSION, 124 .d_flags = 0, 125 .d_open = ams_open, 126 .d_close = ams_close, 127 .d_read = ams_read, 128 .d_ioctl = ams_ioctl, 129 .d_poll = ams_poll, 130 .d_name = "ams", 131 }; 132 133 static int 134 adb_mouse_probe(device_t dev) 135 { 136 uint8_t type; 137 138 type = adb_get_device_type(dev); 139 140 if (type != ADB_DEVICE_MOUSE) 141 return (ENXIO); 142 143 device_set_desc(dev,"ADB Mouse"); 144 return (0); 145 } 146 147 static int 148 adb_mouse_attach(device_t dev) 149 { 150 struct adb_mouse_softc *sc; 151 char *description = "Unknown Pointing Device"; 152 153 size_t r1_len; 154 u_char r1[8]; 155 156 sc = device_get_softc(dev); 157 sc->sc_dev = dev; 158 159 mtx_init(&sc->sc_mtx, "ams", NULL, MTX_DEF); 160 cv_init(&sc->sc_cv,"ams"); 161 162 sc->flags = 0; 163 164 sc->hw.buttons = 2; 165 sc->hw.iftype = MOUSE_IF_UNKNOWN; 166 sc->hw.type = MOUSE_UNKNOWN; 167 sc->hw.model = sc->hw.hwid = 0; 168 169 sc->mode.protocol = MOUSE_PROTO_SYSMOUSE; 170 sc->mode.rate = -1; 171 sc->mode.resolution = 100; 172 sc->mode.accelfactor = 0; 173 sc->mode.level = 0; 174 sc->mode.packetsize = 5; 175 176 sc->buttons = 0; 177 sc->sc_tapping = 0; 178 sc->button_buf = 0; 179 sc->last_buttons = 0; 180 sc->packet_read_len = 0; 181 182 /* Try to switch to extended protocol */ 183 adb_set_device_handler(dev,4); 184 185 switch(adb_get_device_handler(dev)) { 186 case 1: 187 sc->mode.resolution = 100; 188 break; 189 case 2: 190 sc->mode.resolution = 200; 191 break; 192 case 4: 193 r1_len = adb_read_register(dev,1,r1); 194 if (r1_len < 8) 195 break; 196 197 sc->flags |= AMS_EXTENDED; 198 memcpy(&sc->hw.hwid,r1,4); 199 sc->mode.resolution = (r1[4] << 8) | r1[5]; 200 201 switch (r1[6]) { 202 case 0: 203 sc->hw.type = MOUSE_PAD; 204 description = "Tablet"; 205 break; 206 case 1: 207 sc->hw.type = MOUSE_MOUSE; 208 description = "Mouse"; 209 break; 210 case 2: 211 sc->hw.type = MOUSE_TRACKBALL; 212 description = "Trackball"; 213 break; 214 case 3: 215 sc->flags |= AMS_TOUCHPAD; 216 sc->hw.type = MOUSE_PAD; 217 adb_init_trackpad(dev); 218 description = "Touchpad"; 219 break; 220 } 221 222 sc->hw.buttons = r1[7]; 223 224 device_printf(dev,"%d-button %d-dpi %s\n", 225 sc->hw.buttons, sc->mode.resolution,description); 226 227 /* 228 * Check for one of MacAlly's non-compliant 2-button mice. 229 * These claim to speak the extended mouse protocol, but 230 * instead speak the standard protocol and only when their 231 * handler is set to 0x42. 232 */ 233 234 if (sc->hw.hwid == 0x4b4f4954) { 235 adb_set_device_handler(dev,0x42); 236 237 if (adb_get_device_handler(dev) == 0x42) { 238 device_printf(dev, "MacAlly 2-Button Mouse\n"); 239 sc->flags &= ~AMS_EXTENDED; 240 } 241 } 242 243 break; 244 } 245 246 sc->cdev = make_dev(&ams_cdevsw, device_get_unit(dev), 247 UID_ROOT, GID_OPERATOR, 0644, "ams%d", 248 device_get_unit(dev)); 249 sc->cdev->si_drv1 = sc; 250 251 adb_set_autopoll(dev,1); 252 253 return (0); 254 } 255 256 static int 257 adb_mouse_detach(device_t dev) 258 { 259 struct adb_mouse_softc *sc; 260 261 adb_set_autopoll(dev,0); 262 263 sc = device_get_softc(dev); 264 destroy_dev(sc->cdev); 265 266 mtx_destroy(&sc->sc_mtx); 267 cv_destroy(&sc->sc_cv); 268 269 return (0); 270 } 271 272 static void 273 adb_init_trackpad(device_t dev) 274 { 275 struct adb_mouse_softc *sc; 276 struct sysctl_ctx_list *ctx; 277 struct sysctl_oid *tree; 278 279 size_t r1_len; 280 u_char r1[8]; 281 u_char r2[8]; 282 283 sc = device_get_softc(dev); 284 285 r1_len = adb_read_register(dev, 1, r1); 286 287 /* An Extended Mouse register1 must return 8 bytes. */ 288 if (r1_len != 8) 289 return; 290 291 if((r1[6] != 0x0d)) 292 { 293 r1[6] = 0x0d; 294 295 adb_write_register(dev, 1, 8, r1); 296 297 r1_len = adb_read_register(dev, 1, r1); 298 299 if (r1[6] != 0x0d) 300 { 301 device_printf(dev, "ADB Mouse = 0x%x " 302 "(non-Extended Mode)\n", r1[6]); 303 return; 304 } else { 305 device_printf(dev, "ADB Mouse = 0x%x " 306 "(Extended Mode)\n", r1[6]); 307 308 /* Set ADB Extended Features to default values, 309 enabled. */ 310 r2[0] = 0x19; /* Clicking: 0x19 disabled 0x99 enabled */ 311 r2[1] = 0x94; /* Dragging: 0x14 disabled 0x94 enabled */ 312 r2[2] = 0x19; 313 r2[3] = 0xff; /* DragLock: 0xff disabled 0xb2 enabled */ 314 r2[4] = 0xb2; 315 r2[5] = 0x8a; 316 r2[6] = 0x1b; 317 318 r2[7] = 0x57; /* 0x57 bits 3:0 for W mode */ 319 320 adb_write_register(dev, 2, 8, r2); 321 322 } 323 } 324 325 /* 326 * Set up sysctl 327 */ 328 ctx = device_get_sysctl_ctx(dev); 329 tree = device_get_sysctl_tree(dev); 330 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tapping", 331 CTLTYPE_INT | CTLFLAG_RW, sc, 0, adb_tapping_sysctl, 332 "I", "Tapping the pad causes button events"); 333 return; 334 } 335 336 static u_int 337 adb_mouse_receive_packet(device_t dev, u_char status, u_char command, 338 u_char reg, int len, u_char *data) 339 { 340 struct adb_mouse_softc *sc; 341 int i = 0; 342 int xdelta, ydelta; 343 int buttons, tmp_buttons; 344 345 sc = device_get_softc(dev); 346 347 if (command != ADB_COMMAND_TALK || reg != 0 || len < 2) 348 return (0); 349 350 ydelta = data[0] & 0x7f; 351 xdelta = data[1] & 0x7f; 352 353 buttons = 0; 354 buttons |= !(data[0] & 0x80); 355 buttons |= !(data[1] & 0x80) << 1; 356 357 if (sc->flags & AMS_EXTENDED) { 358 for (i = 2; i < len && i < 5; i++) { 359 xdelta |= (data[i] & 0x07) << (3*i + 1); 360 ydelta |= (data[i] & 0x70) << (3*i - 3); 361 362 buttons |= !(data[i] & 0x08) << (2*i - 2); 363 buttons |= !(data[i] & 0x80) << (2*i - 1); 364 } 365 } else { 366 len = 2; /* Ignore extra data */ 367 } 368 369 /* Do sign extension as necessary */ 370 if (xdelta & (0x40 << 3*(len-2))) 371 xdelta |= 0xffffffc0 << 3*(len - 2); 372 if (ydelta & (0x40 << 3*(len-2))) 373 ydelta |= 0xffffffc0 << 3*(len - 2); 374 375 if ((sc->flags & AMS_TOUCHPAD) && (sc->sc_tapping == 1)) { 376 tmp_buttons = buttons; 377 if (buttons == 0x12) { 378 /* Map a double tap on button 3. 379 Keep the button state for the next sequence. 380 A double tap sequence is followed by a single tap 381 sequence. 382 */ 383 tmp_buttons = 0x3; 384 sc->button_buf = tmp_buttons; 385 } else if (buttons == 0x2) { 386 /* Map a single tap on button 2. But only if it is 387 not a successor from a double tap. 388 */ 389 if (sc->button_buf != 0x3) 390 tmp_buttons = 0x2; 391 else 392 tmp_buttons = 0; 393 394 sc->button_buf = 0; 395 } 396 buttons = tmp_buttons; 397 } 398 399 /* 400 * Some mice report high-numbered buttons on the wrong button number, 401 * so set the highest-numbered real button as pressed if there are 402 * mysterious high-numbered ones set. 403 * 404 * Don't do this for touchpads, because touchpads also trigger 405 * high button events when they are touched. 406 */ 407 408 if (rounddown2(buttons, 1 << sc->hw.buttons) 409 && !(sc->flags & AMS_TOUCHPAD)) { 410 buttons |= 1 << (sc->hw.buttons - 1); 411 } 412 buttons &= (1 << sc->hw.buttons) - 1; 413 414 mtx_lock(&sc->sc_mtx); 415 416 /* Add in our new deltas, and take into account 417 Apple's opposite meaning for Y axis motion */ 418 419 sc->xdelta += xdelta; 420 sc->ydelta -= ydelta; 421 422 sc->buttons = buttons; 423 424 mtx_unlock(&sc->sc_mtx); 425 426 cv_broadcast(&sc->sc_cv); 427 selwakeuppri(&sc->rsel, PZERO); 428 429 return (0); 430 } 431 432 static int 433 ams_open(struct cdev *dev, int flag, int fmt, struct thread *p) 434 { 435 struct adb_mouse_softc *sc; 436 437 sc = CDEV_GET_SOFTC(dev); 438 if (sc == NULL) 439 return (ENXIO); 440 441 mtx_lock(&sc->sc_mtx); 442 sc->packet_read_len = 0; 443 sc->xdelta = 0; 444 sc->ydelta = 0; 445 sc->buttons = 0; 446 mtx_unlock(&sc->sc_mtx); 447 448 return (0); 449 } 450 451 static int 452 ams_close(struct cdev *dev, int flag, int fmt, struct thread *p) 453 { 454 struct adb_mouse_softc *sc; 455 456 sc = CDEV_GET_SOFTC(dev); 457 458 cv_broadcast(&sc->sc_cv); 459 selwakeuppri(&sc->rsel, PZERO); 460 return (0); 461 } 462 463 static int 464 ams_poll(struct cdev *dev, int events, struct thread *p) 465 { 466 struct adb_mouse_softc *sc; 467 468 sc = CDEV_GET_SOFTC(dev); 469 if (sc == NULL) 470 return (EIO); 471 472 if (events & (POLLIN | POLLRDNORM)) { 473 mtx_lock(&sc->sc_mtx); 474 475 if (sc->xdelta == 0 && sc->ydelta == 0 && 476 sc->buttons == sc->last_buttons && 477 sc->packet_read_len == 0) { 478 selrecord(p, &sc->rsel); 479 events = 0; 480 } else { 481 events &= (POLLIN | POLLRDNORM); 482 } 483 484 mtx_unlock(&sc->sc_mtx); 485 } 486 487 return events; 488 } 489 490 static int 491 ams_read(struct cdev *dev, struct uio *uio, int flag) 492 { 493 struct adb_mouse_softc *sc; 494 size_t len; 495 int8_t outpacket[8]; 496 int error; 497 498 sc = CDEV_GET_SOFTC(dev); 499 if (sc == NULL) 500 return (EIO); 501 502 if (uio->uio_resid <= 0) 503 return (0); 504 505 mtx_lock(&sc->sc_mtx); 506 507 if (!sc->packet_read_len) { 508 if (sc->xdelta == 0 && sc->ydelta == 0 && 509 sc->buttons == sc->last_buttons) { 510 511 if (flag & O_NONBLOCK) { 512 mtx_unlock(&sc->sc_mtx); 513 return EWOULDBLOCK; 514 } 515 516 517 /* Otherwise, block on new data */ 518 error = cv_wait_sig(&sc->sc_cv, &sc->sc_mtx); 519 if (error) { 520 mtx_unlock(&sc->sc_mtx); 521 return (error); 522 } 523 } 524 525 sc->packet[0] = 1U << 7; 526 sc->packet[0] |= (!(sc->buttons & 1)) << 2; 527 sc->packet[0] |= (!(sc->buttons & 4)) << 1; 528 sc->packet[0] |= (!(sc->buttons & 2)); 529 530 if (sc->xdelta > 127) { 531 sc->packet[1] = 127; 532 sc->packet[3] = sc->xdelta - 127; 533 } else if (sc->xdelta < -127) { 534 sc->packet[1] = -127; 535 sc->packet[3] = sc->xdelta + 127; 536 } else { 537 sc->packet[1] = sc->xdelta; 538 sc->packet[3] = 0; 539 } 540 541 if (sc->ydelta > 127) { 542 sc->packet[2] = 127; 543 sc->packet[4] = sc->ydelta - 127; 544 } else if (sc->ydelta < -127) { 545 sc->packet[2] = -127; 546 sc->packet[4] = sc->ydelta + 127; 547 } else { 548 sc->packet[2] = sc->ydelta; 549 sc->packet[4] = 0; 550 } 551 552 /* No Z movement */ 553 sc->packet[5] = 0; 554 sc->packet[6] = 0; 555 556 sc->packet[7] = ~((uint8_t)(sc->buttons >> 3)) & 0x7f; 557 558 559 sc->last_buttons = sc->buttons; 560 sc->xdelta = 0; 561 sc->ydelta = 0; 562 563 sc->packet_read_len = sc->mode.packetsize; 564 } 565 566 len = (sc->packet_read_len > uio->uio_resid) ? 567 uio->uio_resid : sc->packet_read_len; 568 569 memcpy(outpacket,sc->packet + 570 (sc->mode.packetsize - sc->packet_read_len),len); 571 sc->packet_read_len -= len; 572 573 mtx_unlock(&sc->sc_mtx); 574 575 error = uiomove(outpacket,len,uio); 576 577 return (error); 578 } 579 580 581 static int 582 ams_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, 583 struct thread *p) 584 { 585 struct adb_mouse_softc *sc; 586 mousemode_t mode; 587 588 sc = CDEV_GET_SOFTC(dev); 589 if (sc == NULL) 590 return (EIO); 591 592 switch (cmd) { 593 case MOUSE_GETHWINFO: 594 *(mousehw_t *)addr = sc->hw; 595 break; 596 case MOUSE_GETMODE: 597 *(mousemode_t *)addr = sc->mode; 598 break; 599 case MOUSE_SETMODE: 600 mode = *(mousemode_t *)addr; 601 addr = (caddr_t)&mode.level; 602 603 /* Fallthrough */ 604 605 case MOUSE_SETLEVEL: 606 if (*(int *)addr == -1) 607 break; 608 else if (*(int *)addr == 1) { 609 sc->mode.level = 1; 610 sc->mode.packetsize = 8; 611 break; 612 } else if (*(int *)addr == 0) { 613 sc->mode.level = 0; 614 sc->mode.packetsize = 5; 615 break; 616 } 617 618 return EINVAL; 619 case MOUSE_GETLEVEL: 620 *(int *)addr = sc->mode.level; 621 break; 622 623 case MOUSE_GETSTATUS: { 624 mousestatus_t *status = (mousestatus_t *) addr; 625 626 mtx_lock(&sc->sc_mtx); 627 628 status->button = sc->buttons; 629 status->obutton = sc->last_buttons; 630 631 status->flags = status->button ^ status->obutton; 632 633 if (sc->xdelta != 0 || sc->ydelta) 634 status->flags |= MOUSE_POSCHANGED; 635 if (status->button != status->obutton) 636 status->flags |= MOUSE_BUTTONSCHANGED; 637 638 status->dx = sc->xdelta; 639 status->dy = sc->ydelta; 640 status->dz = 0; 641 642 sc->xdelta = 0; 643 sc->ydelta = 0; 644 sc->last_buttons = sc->buttons; 645 646 mtx_unlock(&sc->sc_mtx); 647 648 break; } 649 default: 650 return ENOTTY; 651 } 652 653 return (0); 654 } 655 656 static int 657 adb_tapping_sysctl(SYSCTL_HANDLER_ARGS) 658 { 659 struct adb_mouse_softc *sc = arg1; 660 device_t dev; 661 int error; 662 u_char r2[8]; 663 u_int tapping; 664 665 dev = sc->sc_dev; 666 tapping = sc->sc_tapping; 667 668 error = sysctl_handle_int(oidp, &tapping, 0, req); 669 670 if (error || !req->newptr) 671 return (error); 672 673 if (tapping == 1) { 674 adb_read_register(dev, 2, r2); 675 r2[0] = 0x99; /* enable tapping. */ 676 adb_write_register(dev, 2, 8, r2); 677 sc->sc_tapping = 1; 678 } else if (tapping == 0) { 679 adb_read_register(dev, 2, r2); 680 r2[0] = 0x19; /* disable tapping. */ 681 adb_write_register(dev, 2, 8, r2); 682 sc->sc_tapping = 0; 683 } 684 else 685 return (EINVAL); 686 687 return (0); 688 }
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