uatp.c revision 1.10
1 /* $NetBSD: uatp.c,v 1.10 2014/07/17 17:11:12 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2011-2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * uatp(4) - USB Apple Trackpad 34 * 35 * The uatp driver talks the protocol of the USB trackpads found in 36 * Apple laptops since 2005, including PowerBooks, iBooks, MacBooks, 37 * and MacBook Pros. Some of these also present generic USB HID mice 38 * on another USB report id, which the ums(4) driver can handle, but 39 * Apple's protocol gives more detailed sensor data that lets us detect 40 * multiple fingers to emulate multi-button mice and scroll wheels. 41 */ 42 43 /* 45 * Protocol 46 * 47 * The device has a set of horizontal sensors, each being a column at a 48 * particular position on the x axis that tells you whether there is 49 * pressure anywhere on that column, and vertical sensors, each being a 50 * row at a particular position on the y axis that tells you whether 51 * there is pressure anywhere on that row. 52 * 53 * Whenever the device senses anything, it emits a readout of all of 54 * the sensors, in some model-dependent order. (For the order, see 55 * read_sample_1 and read_sample_2.) Each sensor datum is an unsigned 56 * eight-bit quantity representing some measure of pressure. (Of 57 * course, it really measures capacitance, not pressure, but we'll call 58 * it `pressure' here.) 59 */ 60 61 /* 62 * Interpretation 63 * 64 * To interpret the finger's position on the trackpad, the driver 65 * computes a weighted average over all possible positions, weighted by 66 * the pressure at that position. The weighted average is computed in 67 * the dimensions of the screen, rather than the trackpad, in order to 68 * admit a finer resolution of positions than the trackpad grid. 69 * 70 * To update the finger's position smoothly on the trackpad, the driver 71 * computes a weighted average of the old raw position, the old 72 * smoothed position, and the new smoothed position. The weights are 73 * given by the old_raw_weight, old_smoothed_weight, and new_raw_weight 74 * sysctl knobs. 75 * 76 * Finally, to move the cursor, the driver takes the difference between 77 * the old and new positions and accelerates it according to some 78 * heuristic knobs that need to be reworked. 79 * 80 * Finally, there are some bells & whistles to detect tapping and to 81 * emulate a three-button mouse by leaving two or three fingers on the 82 * trackpad while pressing the button. 83 */ 84 85 /* 86 * Future work 87 * 88 * With the raw sensor data available, we could implement fancier bells 89 * & whistles too, such as pinch-to-zoom. However, wsmouse supports 90 * only four-dimensional mice with buttons, and we already use two 91 * dimensions for mousing and two dimensions for scrolling, so there's 92 * no straightforward way to report zooming and other gestures to the 93 * operating system. Probably a better way to do this would be just to 94 * attach uhid(4) instead of uatp(4) and to read the raw sensors data 95 * yourself -- but that requires hairy mode switching for recent models 96 * (see geyser34_enable_raw_mode). 97 * 98 * XXX Rework the acceleration knobs. 99 * XXX Implement edge scrolling. 100 * XXX Fix sysctl setup; preserve knobs across suspend/resume. 101 * (uatp0 detaches and reattaches across suspend/resume, so as 102 * written, the sysctl tree is torn down and rebuilt, losing any 103 * state the user may have set.) 104 * XXX Refactor motion state so I can understand it again. 105 * Should make a struct uatp_motion for all that state. 106 * XXX Add hooks for ignoring trackpad input while typing. 107 */ 108 109 /* 111 * Classifying devices 112 * 113 * I have only one MacBook to test this driver, but the driver should 114 * be applicable to almost every Apple laptop made since the beginning 115 * of 2005, so the driver reports lots of debugging output to help to 116 * classify devices. Boot with `boot -v' (verbose) and check the 117 * output of `dmesg | grep uatp' to answer the following questions: 118 * 119 * - What devices (vendor, product, class, subclass, proto, USB HID 120 * report dump) fail to attach when you think they should work? 121 * (vendor not apple, class not hid, proto not mouse) 122 * 123 * - What devices have an unknown product id? 124 * `unknown vendor/product id' 125 * 126 * - What devices have the wrong screen-to-trackpad ratios? 127 * `... x sensors, scaled by ... for ... points on screen' 128 * `... y sensors, scaled by ... for ... points on screen' 129 * You can tweak hw.uatp0.x_ratio and hw.uatp0.y_ratio to adjust 130 * this, up to a maximum of 384 for each value. 131 * 132 * - What devices have the wrong input size? 133 * `expected input size ... but got ... for Apple trackpad' 134 * 135 * - What devices give wrong-sized packets? 136 * `discarding ...-byte input' 137 * 138 * - What devices split packets in chunks? 139 * `partial packet: ... bytes' 140 * 141 * - What devices develop large sensor readouts? 142 * `large sensor readout: ...' 143 * 144 * - What devices have the wrong number of sensors? Are there parts of 145 * your trackpad that the system doesn't seem to notice? You can 146 * tweak hw.uatp0.x_sensors and hw.uatp0.y_sensors, up to a maximum 147 * of 32 for each value. 148 */ 149 150 #include <sys/cdefs.h> 152 __KERNEL_RCSID(0, "$NetBSD: uatp.c,v 1.10 2014/07/17 17:11:12 riastradh Exp $"); 153 154 #include <sys/types.h> 155 #include <sys/param.h> 156 #include <sys/atomic.h> 157 #include <sys/device.h> 158 #include <sys/errno.h> 159 #include <sys/ioctl.h> 160 #include <sys/kernel.h> 161 #include <sys/module.h> 162 #include <sys/sysctl.h> 163 #include <sys/systm.h> 164 #include <sys/time.h> 165 166 /* Order is important here...sigh... */ 167 #include <dev/usb/usb.h> 168 #include <dev/usb/usbdi.h> 169 #include <dev/usb/usbdi_util.h> 170 #include <dev/usb/usbdevs.h> 171 #include <dev/usb/uhidev.h> 172 #include <dev/usb/hid.h> 173 #include <dev/usb/usbhid.h> 174 175 #include <dev/wscons/wsconsio.h> 176 #include <dev/wscons/wsmousevar.h> 177 178 #define CHECK(condition, fail) do { \ 179 if (! (condition)) { \ 180 aprint_error_dev(uatp_dev(sc), "%s: check failed: %s\n",\ 181 __func__, #condition); \ 182 fail; \ 183 } \ 184 } while (0) 185 186 #define UATP_DEBUG_ATTACH (1 << 0) 188 #define UATP_DEBUG_MISC (1 << 1) 189 #define UATP_DEBUG_WSMOUSE (1 << 2) 190 #define UATP_DEBUG_IOCTL (1 << 3) 191 #define UATP_DEBUG_RESET (1 << 4) 192 #define UATP_DEBUG_INTR (1 << 5) 193 #define UATP_DEBUG_PARSE (1 << 6) 194 #define UATP_DEBUG_TAP (1 << 7) 195 #define UATP_DEBUG_EMUL_BUTTON (1 << 8) 196 #define UATP_DEBUG_ACCUMULATE (1 << 9) 197 #define UATP_DEBUG_STATUS (1 << 10) 198 #define UATP_DEBUG_SPURINTR (1 << 11) 199 #define UATP_DEBUG_MOVE (1 << 12) 200 #define UATP_DEBUG_ACCEL (1 << 13) 201 #define UATP_DEBUG_TRACK_DIST (1 << 14) 202 #define UATP_DEBUG_PALM (1 << 15) 203 204 #if UATP_DEBUG 205 # define DPRINTF(sc, flags, format) do { \ 206 if ((flags) & (sc)->sc_debug_flags) { \ 207 printf("%s: %s: ", device_xname(uatp_dev(sc)), __func__); \ 208 printf format; \ 209 } \ 210 } while (0) 211 #else 212 # define DPRINTF(sc, flags, format) do {} while (0) 213 #endif 214 215 /* Maximum number of bytes in an incoming packet of sensor data. */ 216 #define UATP_MAX_INPUT_SIZE 81 217 218 /* Maximum number of sensors in each dimension. */ 219 #define UATP_MAX_X_SENSORS 32 220 #define UATP_MAX_Y_SENSORS 32 221 #define UATP_MAX_SENSORS 32 222 #define UATP_SENSORS (UATP_MAX_X_SENSORS + UATP_MAX_Y_SENSORS) 223 224 /* Maximum accumulated sensor value. */ 225 #define UATP_MAX_ACC 0xff 226 227 /* Maximum screen dimension to sensor dimension ratios. */ 228 #define UATP_MAX_X_RATIO 0x180 229 #define UATP_MAX_Y_RATIO 0x180 230 #define UATP_MAX_RATIO 0x180 231 232 /* Maximum weight for positions in motion calculation. */ 233 #define UATP_MAX_WEIGHT 0x7f 234 235 /* Maximum possible trackpad position in a single dimension. */ 236 #define UATP_MAX_POSITION (UATP_MAX_SENSORS * UATP_MAX_RATIO) 237 238 /* Bounds on acceleration. */ 239 #define UATP_MAX_MOTION_MULTIPLIER 16 240 241 /* Status bits transmitted in the last byte of an input packet. */ 242 #define UATP_STATUS_BUTTON (1 << 0) /* Button pressed */ 243 #define UATP_STATUS_BASE (1 << 2) /* Base sensor data */ 244 #define UATP_STATUS_POST_RESET (1 << 4) /* Post-reset */ 245 246 /* Forward declarations */ 248 249 struct uatp_softc; /* Device driver state. */ 250 struct uatp_descriptor; /* Descriptor for a particular model. */ 251 struct uatp_parameters; /* Parameters common to a set of models. */ 252 struct uatp_knobs; /* User-settable configuration knobs. */ 253 enum uatp_tap_state { 254 TAP_STATE_INITIAL, 255 TAP_STATE_TAPPING, 256 TAP_STATE_TAPPED, 257 TAP_STATE_DOUBLE_TAPPING, 258 TAP_STATE_DRAGGING_DOWN, 259 TAP_STATE_DRAGGING_UP, 260 TAP_STATE_TAPPING_IN_DRAG, 261 }; 262 263 static const struct uatp_descriptor *find_uatp_descriptor 264 (const struct uhidev_attach_arg *); 265 static device_t uatp_dev(const struct uatp_softc *); 266 static uint8_t *uatp_x_sample(struct uatp_softc *); 267 static uint8_t *uatp_y_sample(struct uatp_softc *); 268 static int *uatp_x_acc(struct uatp_softc *); 269 static int *uatp_y_acc(struct uatp_softc *); 270 static void uatp_clear_position(struct uatp_softc *); 271 static unsigned int uatp_x_sensors(const struct uatp_softc *); 272 static unsigned int uatp_y_sensors(const struct uatp_softc *); 273 static unsigned int uatp_x_ratio(const struct uatp_softc *); 274 static unsigned int uatp_y_ratio(const struct uatp_softc *); 275 static unsigned int uatp_old_raw_weight(const struct uatp_softc *); 276 static unsigned int uatp_old_smoothed_weight(const struct uatp_softc *); 277 static unsigned int uatp_new_raw_weight(const struct uatp_softc *); 278 static int scale_motion(const struct uatp_softc *, int, int *, 279 const unsigned int *, const unsigned int *); 280 static int uatp_scale_motion(const struct uatp_softc *, int, int *); 281 static int uatp_scale_fast_motion(const struct uatp_softc *, int, int *); 282 static int uatp_match(device_t, cfdata_t, void *); 283 static void uatp_attach(device_t, device_t, void *); 284 static void uatp_setup_sysctl(struct uatp_softc *); 285 static bool uatp_setup_sysctl_knob(struct uatp_softc *, int *, const char *, 286 const char *); 287 static void uatp_childdet(device_t, device_t); 288 static int uatp_detach(device_t, int); 289 static int uatp_activate(device_t, enum devact); 290 static int uatp_enable(void *); 291 static void uatp_disable(void *); 292 static int uatp_ioctl(void *, unsigned long, void *, int, struct lwp *); 293 static void geyser34_enable_raw_mode(struct uatp_softc *); 294 static void geyser34_initialize(struct uatp_softc *); 295 static int geyser34_finalize(struct uatp_softc *); 296 static void geyser34_deferred_reset(struct uatp_softc *); 297 static void geyser34_reset_task(void *); 298 static void uatp_intr(struct uhidev *, void *, unsigned int); 299 static bool base_sample_softc_flag(const struct uatp_softc *, const uint8_t *); 300 static bool base_sample_input_flag(const struct uatp_softc *, const uint8_t *); 301 static void read_sample_1(uint8_t *, uint8_t *, const uint8_t *); 302 static void read_sample_2(uint8_t *, uint8_t *, const uint8_t *); 303 static void accumulate_sample_1(struct uatp_softc *); 304 static void accumulate_sample_2(struct uatp_softc *); 305 static void uatp_input(struct uatp_softc *, uint32_t, int, int, int, int); 306 static uint32_t uatp_tapped_buttons(struct uatp_softc *); 307 static bool interpret_input(struct uatp_softc *, int *, int *, int *, int *, 308 uint32_t *); 309 static unsigned int interpret_dimension(struct uatp_softc *, const int *, 310 unsigned int, unsigned int, unsigned int *, unsigned int *); 311 static void tap_initialize(struct uatp_softc *); 312 static void tap_finalize(struct uatp_softc *); 313 static void tap_enable(struct uatp_softc *); 314 static void tap_disable(struct uatp_softc *); 315 static void tap_transition(struct uatp_softc *, enum uatp_tap_state, 316 const struct timeval *, unsigned int, unsigned int); 317 static void tap_transition_initial(struct uatp_softc *); 318 static void tap_transition_tapping(struct uatp_softc *, const struct timeval *, 319 unsigned int); 320 static void tap_transition_double_tapping(struct uatp_softc *, 321 const struct timeval *, unsigned int); 322 static void tap_transition_dragging_down(struct uatp_softc *); 323 static void tap_transition_tapping_in_drag(struct uatp_softc *, 324 const struct timeval *, unsigned int); 325 static void tap_transition_tapped(struct uatp_softc *, const struct timeval *); 326 static void tap_transition_dragging_up(struct uatp_softc *); 327 static void tap_reset(struct uatp_softc *); 328 static void tap_reset_wait(struct uatp_softc *); 329 static void tap_touched(struct uatp_softc *, unsigned int); 330 static bool tap_released(struct uatp_softc *); 331 static void schedule_untap(struct uatp_softc *); 332 static void untap_callout(void *); 333 static uint32_t emulated_buttons(struct uatp_softc *, unsigned int); 334 static void update_position(struct uatp_softc *, unsigned int, 335 unsigned int, unsigned int, int *, int *, int *, int *); 336 static void move_mouse(struct uatp_softc *, unsigned int, unsigned int, 337 int *, int *); 338 static void scroll_wheel(struct uatp_softc *, unsigned int, unsigned int, 339 int *, int *); 340 static void move(struct uatp_softc *, const char *, unsigned int, unsigned int, 341 int *, int *, int *, int *, unsigned int *, unsigned int *, int *, int *); 342 static int smooth(struct uatp_softc *, unsigned int, unsigned int, 343 unsigned int); 344 static bool motion_below_threshold(struct uatp_softc *, unsigned int, 345 int, int); 346 static int accelerate(struct uatp_softc *, unsigned int, unsigned int, 347 unsigned int, unsigned int, bool, int *); 348 349 struct uatp_knobs { 351 /* 352 * Button emulation. What do we do when two or three fingers 353 * are on the trackpad when the user presses the button? 354 */ 355 unsigned int two_finger_buttons; 356 unsigned int three_finger_buttons; 357 358 #if 0 359 /* 360 * Edge scrolling. 361 * 362 * XXX Implement this. What units should these be in? 363 */ 364 unsigned int top_edge; 365 unsigned int bottom_edge; 366 unsigned int left_edge; 367 unsigned int right_edge; 368 #endif 369 370 /* 371 * Multifinger tracking. What do we do with multiple fingers? 372 * 0. Ignore them. 373 * 1. Try to interpret them as ordinary mousing. 374 * 2. Act like a two-dimensional scroll wheel. 375 */ 376 unsigned int multifinger_track; 377 378 /* 379 * Sensor parameters. 380 */ 381 unsigned int x_sensors; 382 unsigned int x_ratio; 383 unsigned int y_sensors; 384 unsigned int y_ratio; 385 unsigned int sensor_threshold; 386 unsigned int sensor_normalizer; 387 unsigned int palm_width; 388 unsigned int old_raw_weight; 389 unsigned int old_smoothed_weight; 390 unsigned int new_raw_weight; 391 392 /* 393 * Motion parameters. 394 * 395 * XXX There should be a more principled model of acceleration. 396 */ 397 unsigned int motion_remainder; 398 unsigned int motion_threshold; 399 unsigned int motion_multiplier; 400 unsigned int motion_divisor; 401 unsigned int fast_motion_threshold; 402 unsigned int fast_motion_multiplier; 403 unsigned int fast_motion_divisor; 404 unsigned int fast_per_direction; 405 unsigned int motion_delay; 406 407 /* 408 * Tapping. 409 */ 410 unsigned int tap_limit_msec; 411 unsigned int double_tap_limit_msec; 412 unsigned int one_finger_tap_buttons; 413 unsigned int two_finger_tap_buttons; 414 unsigned int three_finger_tap_buttons; 415 unsigned int tap_track_distance_limit; 416 }; 417 418 static const struct uatp_knobs default_knobs = { 420 /* 421 * Button emulation. Fingers on the trackpad don't change it 422 * by default -- it's still the left button. 423 * 424 * XXX The left button should have a name. 425 */ 426 .two_finger_buttons = 1, 427 .three_finger_buttons = 1, 428 429 #if 0 430 /* 431 * Edge scrolling. Off by default. 432 */ 433 .top_edge = 0, 434 .bottom_edge = 0, 435 .left_edge = 0, 436 .right_edge = 0, 437 #endif 438 439 /* 440 * Multifinger tracking. Ignore by default. 441 */ 442 .multifinger_track = 0, 443 444 /* 445 * Sensor parameters. 446 */ 447 .x_sensors = 0, /* default for model */ 448 .x_ratio = 0, /* default for model */ 449 .y_sensors = 0, /* default for model */ 450 .y_ratio = 0, /* default for model */ 451 .sensor_threshold = 5, 452 .sensor_normalizer = 5, 453 .palm_width = 0, /* palm detection disabled */ 454 .old_raw_weight = 0, 455 .old_smoothed_weight = 5, 456 .new_raw_weight = 1, 457 458 /* 459 * Motion parameters. 460 */ 461 .motion_remainder = 1, 462 .motion_threshold = 0, 463 .motion_multiplier = 1, 464 .motion_divisor = 1, 465 .fast_motion_threshold = 10, 466 .fast_motion_multiplier = 3, 467 .fast_motion_divisor = 2, 468 .fast_per_direction = 0, 469 .motion_delay = 4, 470 471 /* 472 * Tapping. Disabled by default, with a reasonable time set 473 * nevertheless so that you can just set the buttons to enable 474 * it. 475 */ 476 .tap_limit_msec = 100, 477 .double_tap_limit_msec = 200, 478 .one_finger_tap_buttons = 0, 479 .two_finger_tap_buttons = 0, 480 .three_finger_tap_buttons = 0, 481 .tap_track_distance_limit = 200, 482 }; 483 484 struct uatp_softc { 486 struct uhidev sc_hdev; /* USB parent. */ 487 device_t sc_wsmousedev; /* Attached wsmouse device. */ 488 const struct uatp_parameters *sc_parameters; 489 struct uatp_knobs sc_knobs; 490 struct sysctllog *sc_log; /* Log for sysctl knobs. */ 491 const struct sysctlnode *sc_node; /* Our sysctl node. */ 492 unsigned int sc_input_size; /* Input packet size. */ 493 uint8_t sc_input[UATP_MAX_INPUT_SIZE]; /* Buffer for a packet. */ 494 unsigned int sc_input_index; /* Current index into sc_input. */ 495 int sc_acc[UATP_SENSORS]; /* Accumulated sensor state. */ 496 uint8_t sc_base[UATP_SENSORS]; /* Base sample. */ 497 uint8_t sc_sample[UATP_SENSORS];/* Current sample. */ 498 unsigned int sc_motion_timer; /* XXX describe; motion_delay */ 499 int sc_x_raw; /* Raw horiz. mouse position. */ 500 int sc_y_raw; /* Raw vert. mouse position. */ 501 int sc_z_raw; /* Raw horiz. scroll position. */ 502 int sc_w_raw; /* Raw vert. scroll position. */ 503 int sc_x_smoothed; /* Smoothed horiz. mouse position. */ 504 int sc_y_smoothed; /* Smoothed vert. mouse position. */ 505 int sc_z_smoothed; /* Smoothed horiz. scroll position. */ 506 int sc_w_smoothed; /* Smoothed vert. scroll position. */ 507 int sc_x_remainder; /* Remainders from acceleration. */ 508 int sc_y_remainder; 509 int sc_z_remainder; 510 int sc_w_remainder; 511 unsigned int sc_track_distance; /* Distance^2 finger has tracked, 512 * squared to avoid sqrt in kernel. */ 513 uint32_t sc_status; /* Status flags: */ 514 #define UATP_ENABLED (1 << 0) /* . Is the wsmouse enabled? */ 515 #define UATP_DYING (1 << 1) /* . Have we been deactivated? */ 516 #define UATP_VALID (1 << 2) /* . Do we have valid sensor data? */ 517 struct usb_task sc_reset_task; /* Task for resetting device. */ 518 519 callout_t sc_untap_callout; /* Releases button after tap. */ 520 kmutex_t sc_tap_mutex; /* Protects the following fields. */ 521 kcondvar_t sc_tap_cv; /* Signalled by untap callout. */ 522 enum uatp_tap_state sc_tap_state; /* Current tap state. */ 523 unsigned int sc_tapping_fingers; /* No. fingers tapping. */ 524 unsigned int sc_tapped_fingers; /* No. fingers of last tap. */ 525 struct timeval sc_tap_timer; /* Timer for tap state transitions. */ 526 uint32_t sc_buttons; /* Physical buttons pressed. */ 527 uint32_t sc_all_buttons; /* Buttons pressed or tapped. */ 528 529 #if UATP_DEBUG 530 uint32_t sc_debug_flags; /* Debugging output enabled. */ 531 #endif 532 }; 533 534 struct uatp_descriptor { 536 uint16_t vendor; 537 uint16_t product; 538 const char *description; 539 const struct uatp_parameters *parameters; 540 }; 541 542 struct uatp_parameters { 543 unsigned int x_ratio; /* Screen width / trackpad width. */ 544 unsigned int x_sensors; /* Number of horizontal sensors. */ 545 unsigned int x_sensors_17; /* XXX Same, on a 17" laptop. */ 546 unsigned int y_ratio; /* Screen height / trackpad height. */ 547 unsigned int y_sensors; /* Number of vertical sensors. */ 548 unsigned int input_size; /* Size in bytes of input packets. */ 549 550 /* Device-specific initialization routine. May be null. */ 551 void (*initialize)(struct uatp_softc *); 552 553 /* Device-specific finalization routine. May be null. May fail. */ 554 int (*finalize)(struct uatp_softc *); 555 556 /* Tests whether this is a base sample. Second argument is 557 * input_size bytes long. */ 558 bool (*base_sample)(const struct uatp_softc *, const uint8_t *); 559 560 /* Reads a sensor sample from an input packet. First argument 561 * is UATP_MAX_X_SENSORS bytes long; second, UATP_MAX_Y_SENSORS 562 * bytes; third, input_size bytes. */ 563 void (*read_sample)(uint8_t *, uint8_t *, const uint8_t *); 564 565 /* Accumulates sensor state in sc->sc_acc. */ 566 void (*accumulate)(struct uatp_softc *); 567 568 /* Called on spurious interrupts to reset. May be null. */ 569 void (*reset)(struct uatp_softc *); 570 }; 571 572 /* Known device parameters */ 574 575 static const struct uatp_parameters fountain_parameters = { 576 .x_ratio = 64, .x_sensors = 16, .x_sensors_17 = 26, 577 .y_ratio = 43, .y_sensors = 16, 578 .input_size = 81, 579 .initialize = NULL, 580 .finalize = NULL, 581 .base_sample = base_sample_softc_flag, 582 .read_sample = read_sample_1, 583 .accumulate = accumulate_sample_1, 584 .reset = NULL, 585 }; 586 587 static const struct uatp_parameters geyser_1_parameters = { 588 .x_ratio = 64, .x_sensors = 16, .x_sensors_17 = 26, 589 .y_ratio = 43, .y_sensors = 16, 590 .input_size = 81, 591 .initialize = NULL, 592 .finalize = NULL, 593 .base_sample = base_sample_softc_flag, 594 .read_sample = read_sample_1, 595 .accumulate = accumulate_sample_1, 596 .reset = NULL, 597 }; 598 599 static const struct uatp_parameters geyser_2_parameters = { 600 .x_ratio = 64, .x_sensors = 15, .x_sensors_17 = 20, 601 .y_ratio = 43, .y_sensors = 9, 602 .input_size = 64, 603 .initialize = NULL, 604 .finalize = NULL, 605 .base_sample = base_sample_softc_flag, 606 .read_sample = read_sample_2, 607 .accumulate = accumulate_sample_1, 608 .reset = NULL, 609 }; 610 611 /* 612 * The Geyser 3 and Geyser 4 share parameters. They also present 613 * generic USB HID mice on a different report id, so we have smaller 614 * packets by one byte (uhidev handles multiplexing report ids) and 615 * extra initialization work to switch the mode from generic USB HID 616 * mouse to Apple trackpad. 617 */ 618 619 static const struct uatp_parameters geyser_3_4_parameters = { 620 .x_ratio = 64, .x_sensors = 20, /* XXX */ .x_sensors_17 = 0, 621 .y_ratio = 64, .y_sensors = 9, 622 .input_size = 63, /* 64, minus one for the report id. */ 623 .initialize = geyser34_initialize, 624 .finalize = geyser34_finalize, 625 .base_sample = base_sample_input_flag, 626 .read_sample = read_sample_2, 627 .accumulate = accumulate_sample_2, 628 .reset = geyser34_deferred_reset, 629 }; 630 631 /* Known device models */ 633 634 #define APPLE_TRACKPAD(PRODUCT, DESCRIPTION, PARAMETERS) \ 635 { \ 636 .vendor = USB_VENDOR_APPLE, \ 637 .product = (PRODUCT), \ 638 .description = "Apple " DESCRIPTION " trackpad", \ 639 .parameters = (& (PARAMETERS)), \ 640 } 641 642 #define POWERBOOK_TRACKPAD(PRODUCT, PARAMETERS) \ 643 APPLE_TRACKPAD(PRODUCT, "PowerBook/iBook", PARAMETERS) 644 #define MACBOOK_TRACKPAD(PRODUCT, PARAMETERS) \ 645 APPLE_TRACKPAD(PRODUCT, "MacBook/MacBook Pro", PARAMETERS) 646 647 static const struct uatp_descriptor uatp_descriptors[] = 648 { 649 POWERBOOK_TRACKPAD(0x020e, fountain_parameters), 650 POWERBOOK_TRACKPAD(0x020f, fountain_parameters), 651 POWERBOOK_TRACKPAD(0x030a, fountain_parameters), 652 653 POWERBOOK_TRACKPAD(0x030b, geyser_1_parameters), 654 655 POWERBOOK_TRACKPAD(0x0214, geyser_2_parameters), 656 POWERBOOK_TRACKPAD(0x0215, geyser_2_parameters), 657 POWERBOOK_TRACKPAD(0x0216, geyser_2_parameters), 658 659 MACBOOK_TRACKPAD(0x0217, geyser_3_4_parameters), /* 3 */ 660 MACBOOK_TRACKPAD(0x0218, geyser_3_4_parameters), /* 3 */ 661 MACBOOK_TRACKPAD(0x0219, geyser_3_4_parameters), /* 3 */ 662 663 MACBOOK_TRACKPAD(0x021a, geyser_3_4_parameters), /* 4 */ 664 MACBOOK_TRACKPAD(0x021b, geyser_3_4_parameters), /* 4 */ 665 MACBOOK_TRACKPAD(0x021c, geyser_3_4_parameters), /* 4 */ 666 667 MACBOOK_TRACKPAD(0x0229, geyser_3_4_parameters), /* 4 */ 668 MACBOOK_TRACKPAD(0x022a, geyser_3_4_parameters), /* 4 */ 669 MACBOOK_TRACKPAD(0x022b, geyser_3_4_parameters), /* 4 */ 670 }; 671 672 #undef MACBOOK_TRACKPAD 673 #undef POWERBOOK_TRACKPAD 674 #undef APPLE_TRACKPAD 675 676 /* Miscellaneous utilities */ 678 679 static const struct uatp_descriptor * 680 find_uatp_descriptor(const struct uhidev_attach_arg *uha) 681 { 682 unsigned int i; 683 684 for (i = 0; i < __arraycount(uatp_descriptors); i++) 685 if ((uha->uaa->vendor == uatp_descriptors[i].vendor) && 686 (uha->uaa->product == uatp_descriptors[i].product)) 687 return &uatp_descriptors[i]; 688 689 return NULL; 690 } 691 692 static device_t 693 uatp_dev(const struct uatp_softc *sc) 694 { 695 return sc->sc_hdev.sc_dev; 696 } 697 698 static uint8_t * 699 uatp_x_sample(struct uatp_softc *sc) 700 { 701 return &sc->sc_sample[0]; 702 } 703 704 static uint8_t * 705 uatp_y_sample(struct uatp_softc *sc) 706 { 707 return &sc->sc_sample[UATP_MAX_X_SENSORS]; 708 } 709 710 static int * 711 uatp_x_acc(struct uatp_softc *sc) 712 { 713 return &sc->sc_acc[0]; 714 } 715 716 static int * 717 uatp_y_acc(struct uatp_softc *sc) 718 { 719 return &sc->sc_acc[UATP_MAX_X_SENSORS]; 720 } 721 722 static void 723 uatp_clear_position(struct uatp_softc *sc) 724 { 725 memset(sc->sc_acc, 0, sizeof(sc->sc_acc)); 726 sc->sc_motion_timer = 0; 727 sc->sc_x_raw = sc->sc_x_smoothed = -1; 728 sc->sc_y_raw = sc->sc_y_smoothed = -1; 729 sc->sc_z_raw = sc->sc_z_smoothed = -1; 730 sc->sc_w_raw = sc->sc_w_smoothed = -1; 731 sc->sc_x_remainder = 0; 732 sc->sc_y_remainder = 0; 733 sc->sc_z_remainder = 0; 734 sc->sc_w_remainder = 0; 735 sc->sc_track_distance = 0; 736 } 737 738 static unsigned int 740 uatp_x_sensors(const struct uatp_softc *sc) 741 { 742 if ((0 < sc->sc_knobs.x_sensors) && 743 (sc->sc_knobs.x_sensors <= UATP_MAX_X_SENSORS)) 744 return sc->sc_knobs.x_sensors; 745 else 746 return sc->sc_parameters->x_sensors; 747 } 748 749 static unsigned int 750 uatp_y_sensors(const struct uatp_softc *sc) 751 { 752 if ((0 < sc->sc_knobs.y_sensors) && 753 (sc->sc_knobs.y_sensors <= UATP_MAX_Y_SENSORS)) 754 return sc->sc_knobs.y_sensors; 755 else 756 return sc->sc_parameters->y_sensors; 757 } 758 759 static unsigned int 760 uatp_x_ratio(const struct uatp_softc *sc) 761 { 762 /* XXX Reject bogus values in sysctl. */ 763 if ((0 < sc->sc_knobs.x_ratio) && 764 (sc->sc_knobs.x_ratio <= UATP_MAX_X_RATIO)) 765 return sc->sc_knobs.x_ratio; 766 else 767 return sc->sc_parameters->x_ratio; 768 } 769 770 static unsigned int 771 uatp_y_ratio(const struct uatp_softc *sc) 772 { 773 /* XXX Reject bogus values in sysctl. */ 774 if ((0 < sc->sc_knobs.y_ratio) && 775 (sc->sc_knobs.y_ratio <= UATP_MAX_Y_RATIO)) 776 return sc->sc_knobs.y_ratio; 777 else 778 return sc->sc_parameters->y_ratio; 779 } 780 781 static unsigned int 783 uatp_old_raw_weight(const struct uatp_softc *sc) 784 { 785 /* XXX Reject bogus values in sysctl. */ 786 if (sc->sc_knobs.old_raw_weight <= UATP_MAX_WEIGHT) 787 return sc->sc_knobs.old_raw_weight; 788 else 789 return 0; 790 } 791 792 static unsigned int 793 uatp_old_smoothed_weight(const struct uatp_softc *sc) 794 { 795 /* XXX Reject bogus values in sysctl. */ 796 if (sc->sc_knobs.old_smoothed_weight <= UATP_MAX_WEIGHT) 797 return sc->sc_knobs.old_smoothed_weight; 798 else 799 return 0; 800 } 801 802 static unsigned int 803 uatp_new_raw_weight(const struct uatp_softc *sc) 804 { 805 /* XXX Reject bogus values in sysctl. */ 806 if ((0 < sc->sc_knobs.new_raw_weight) && 807 (sc->sc_knobs.new_raw_weight <= UATP_MAX_WEIGHT)) 808 return sc->sc_knobs.new_raw_weight; 809 else 810 return 1; 811 } 812 813 static int 815 scale_motion(const struct uatp_softc *sc, int delta, int *remainder, 816 const unsigned int *multiplier, const unsigned int *divisor) 817 { 818 int product; 819 820 /* XXX Limit the divisor? */ 821 if (((*multiplier) == 0) || 822 ((*multiplier) > UATP_MAX_MOTION_MULTIPLIER) || 823 ((*divisor) == 0)) 824 DPRINTF(sc, UATP_DEBUG_ACCEL, 825 ("bad knobs; %d (+ %d) --> %d, rem 0\n", 826 delta, *remainder, (delta + (*remainder)))); 827 else 828 DPRINTF(sc, UATP_DEBUG_ACCEL, 829 ("scale %d (+ %d) by %u/%u --> %d, rem %d\n", 830 delta, *remainder, 831 (*multiplier), (*divisor), 832 (((delta + (*remainder)) * ((int) (*multiplier))) 833 / ((int) (*divisor))), 834 (((delta + (*remainder)) * ((int) (*multiplier))) 835 % ((int) (*divisor))))); 836 837 if (sc->sc_knobs.motion_remainder) 838 delta += *remainder; 839 *remainder = 0; 840 841 if (((*multiplier) == 0) || 842 ((*multiplier) > UATP_MAX_MOTION_MULTIPLIER) || 843 ((*divisor) == 0)) 844 return delta; 845 846 product = (delta * ((int) (*multiplier))); 847 *remainder = (product % ((int) (*divisor))); 848 return (product / ((int) (*divisor))); 849 } 850 851 static int 852 uatp_scale_motion(const struct uatp_softc *sc, int delta, int *remainder) 853 { 854 return scale_motion(sc, delta, remainder, 855 &sc->sc_knobs.motion_multiplier, 856 &sc->sc_knobs.motion_divisor); 857 } 858 859 static int 860 uatp_scale_fast_motion(const struct uatp_softc *sc, int delta, int *remainder) 861 { 862 return scale_motion(sc, delta, remainder, 863 &sc->sc_knobs.fast_motion_multiplier, 864 &sc->sc_knobs.fast_motion_divisor); 865 } 866 867 /* Driver goop */ 869 870 CFATTACH_DECL2_NEW(uatp, sizeof(struct uatp_softc), uatp_match, uatp_attach, 871 uatp_detach, uatp_activate, NULL, uatp_childdet); 872 873 static const struct wsmouse_accessops uatp_accessops = { 874 .enable = uatp_enable, 875 .disable = uatp_disable, 876 .ioctl = uatp_ioctl, 877 }; 878 879 static int 880 uatp_match(device_t parent, cfdata_t match, void *aux) 881 { 882 const struct uhidev_attach_arg *uha = aux; 883 void *report_descriptor; 884 int report_size, input_size; 885 const struct uatp_descriptor *uatp_descriptor; 886 887 aprint_debug("%s: vendor 0x%04x, product 0x%04x\n", __func__, 888 (unsigned int)uha->uaa->vendor, 889 (unsigned int)uha->uaa->product); 890 aprint_debug("%s: class 0x%04x, subclass 0x%04x, proto 0x%04x\n", 891 __func__, 892 (unsigned int)uha->uaa->class, 893 (unsigned int)uha->uaa->subclass, 894 (unsigned int)uha->uaa->proto); 895 896 uhidev_get_report_desc(uha->parent, &report_descriptor, &report_size); 897 input_size = hid_report_size(report_descriptor, report_size, 898 hid_input, uha->reportid); 899 aprint_debug("%s: reportid %d, input size %d\n", __func__, 900 (int)uha->reportid, input_size); 901 902 /* 903 * Keyboards, trackpads, and eject buttons share common vendor 904 * and product ids, but not protocols: only the trackpad 905 * reports a mouse protocol. 906 */ 907 if (uha->uaa->proto != UIPROTO_MOUSE) 908 return UMATCH_NONE; 909 910 /* Check for a known vendor/product id. */ 911 uatp_descriptor = find_uatp_descriptor(uha); 912 if (uatp_descriptor == NULL) { 913 aprint_debug("%s: unknown vendor/product id\n", __func__); 914 return UMATCH_NONE; 915 } 916 917 /* Check for the expected input size. */ 918 if ((input_size < 0) || 919 ((unsigned int)input_size != 920 uatp_descriptor->parameters->input_size)) { 921 aprint_debug("%s: expected input size %u\n", __func__, 922 uatp_descriptor->parameters->input_size); 923 return UMATCH_NONE; 924 } 925 926 return UMATCH_VENDOR_PRODUCT_CONF_IFACE; 927 } 928 929 static void 931 uatp_attach(device_t parent, device_t self, void *aux) 932 { 933 struct uatp_softc *sc = device_private(self); 934 const struct uhidev_attach_arg *uha = aux; 935 const struct uatp_descriptor *uatp_descriptor; 936 void *report_descriptor; 937 int report_size, input_size; 938 struct wsmousedev_attach_args a; 939 940 /* Set up uhidev state. (Why doesn't uhidev do most of this?) */ 941 sc->sc_hdev.sc_dev = self; 942 sc->sc_hdev.sc_intr = uatp_intr; 943 sc->sc_hdev.sc_parent = uha->parent; 944 sc->sc_hdev.sc_report_id = uha->reportid; 945 946 /* Identify ourselves to dmesg. */ 947 uatp_descriptor = find_uatp_descriptor(uha); 948 KASSERT(uatp_descriptor != NULL); 949 aprint_normal(": %s\n", uatp_descriptor->description); 950 aprint_naive(": %s\n", uatp_descriptor->description); 951 aprint_verbose_dev(self, 952 "vendor 0x%04x, product 0x%04x, report id %d\n", 953 (unsigned int)uha->uaa->vendor, (unsigned int)uha->uaa->product, 954 (int)uha->reportid); 955 956 uhidev_get_report_desc(uha->parent, &report_descriptor, &report_size); 957 input_size = hid_report_size(report_descriptor, report_size, hid_input, 958 uha->reportid); 959 KASSERT(0 < input_size); 960 sc->sc_input_size = input_size; 961 962 /* Initialize model-specific parameters. */ 963 sc->sc_parameters = uatp_descriptor->parameters; 964 KASSERT((int)sc->sc_parameters->input_size == input_size); 965 KASSERT(sc->sc_parameters->x_sensors <= UATP_MAX_X_SENSORS); 966 KASSERT(sc->sc_parameters->x_ratio <= UATP_MAX_X_RATIO); 967 KASSERT(sc->sc_parameters->y_sensors <= UATP_MAX_Y_SENSORS); 968 KASSERT(sc->sc_parameters->y_ratio <= UATP_MAX_Y_RATIO); 969 aprint_verbose_dev(self, 970 "%u x sensors, scaled by %u for %u points on screen\n", 971 sc->sc_parameters->x_sensors, sc->sc_parameters->x_ratio, 972 sc->sc_parameters->x_sensors * sc->sc_parameters->x_ratio); 973 aprint_verbose_dev(self, 974 "%u y sensors, scaled by %u for %u points on screen\n", 975 sc->sc_parameters->y_sensors, sc->sc_parameters->y_ratio, 976 sc->sc_parameters->y_sensors * sc->sc_parameters->y_ratio); 977 if (sc->sc_parameters->initialize) 978 sc->sc_parameters->initialize(sc); 979 980 /* Register with pmf. Nothing special for suspend/resume. */ 981 if (!pmf_device_register(self, NULL, NULL)) 982 aprint_error_dev(self, "couldn't establish power handler\n"); 983 984 /* Initialize knobs and create sysctl subtree to tweak them. */ 985 sc->sc_knobs = default_knobs; 986 uatp_setup_sysctl(sc); 987 988 /* Initialize tapping. */ 989 tap_initialize(sc); 990 991 /* Attach wsmouse. */ 992 a.accessops = &uatp_accessops; 993 a.accesscookie = sc; 994 sc->sc_wsmousedev = config_found_ia(self, "wsmousedev", &a, 995 wsmousedevprint); 996 } 997 998 /* Sysctl setup */ 1000 1001 static void 1002 uatp_setup_sysctl(struct uatp_softc *sc) 1003 { 1004 int error; 1005 1006 error = sysctl_createv(&sc->sc_log, 0, NULL, &sc->sc_node, 0, 1007 CTLTYPE_NODE, device_xname(uatp_dev(sc)), 1008 SYSCTL_DESCR("uatp configuration knobs"), 1009 NULL, 0, NULL, 0, 1010 CTL_HW, CTL_CREATE, CTL_EOL); 1011 if (error != 0) { 1012 aprint_error_dev(uatp_dev(sc), 1013 "unable to set up sysctl tree hw.%s: %d\n", 1014 device_xname(uatp_dev(sc)), error); 1015 goto err; 1016 } 1017 1018 #if UATP_DEBUG 1019 if (!uatp_setup_sysctl_knob(sc, &sc->sc_debug_flags, "debug", 1020 "uatp(4) debug flags")) 1021 goto err; 1022 #endif 1023 1024 /* 1025 * Button emulation. 1026 */ 1027 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.two_finger_buttons, 1028 "two_finger_buttons", 1029 "buttons to emulate with two fingers on trackpad")) 1030 goto err; 1031 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.three_finger_buttons, 1032 "three_finger_buttons", 1033 "buttons to emulate with three fingers on trackpad")) 1034 goto err; 1035 1036 #if 0 1037 /* 1038 * Edge scrolling. 1039 */ 1040 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.top_edge, "top_edge", 1041 "width of top edge for edge scrolling")) 1042 goto err; 1043 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.bottom_edge, 1044 "bottom_edge", "width of bottom edge for edge scrolling")) 1045 goto err; 1046 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.left_edge, "left_edge", 1047 "width of left edge for edge scrolling")) 1048 goto err; 1049 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.right_edge, "right_edge", 1050 "width of right edge for edge scrolling")) 1051 goto err; 1052 #endif 1053 1054 /* 1056 * Multifinger tracking. 1057 */ 1058 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.multifinger_track, 1059 "multifinger_track", 1060 "0 to ignore multiple fingers, 1 to reset, 2 to scroll")) 1061 goto err; 1062 1063 /* 1064 * Sensor parameters. 1065 */ 1066 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.x_sensors, "x_sensors", 1067 "number of x sensors")) 1068 goto err; 1069 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.x_ratio, "x_ratio", 1070 "screen width to trackpad width ratio")) 1071 goto err; 1072 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.y_sensors, "y_sensors", 1073 "number of y sensors")) 1074 goto err; 1075 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.y_ratio, "y_ratio", 1076 "screen height to trackpad height ratio")) 1077 goto err; 1078 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.sensor_threshold, 1079 "sensor_threshold", "sensor threshold")) 1080 goto err; 1081 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.sensor_normalizer, 1082 "sensor_normalizer", "sensor normalizer")) 1083 goto err; 1084 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.palm_width, 1085 "palm_width", "lower bound on width/height of palm")) 1086 goto err; 1087 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.old_raw_weight, 1088 "old_raw_weight", "weight of old raw position")) 1089 goto err; 1090 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.old_smoothed_weight, 1091 "old_smoothed_weight", "weight of old smoothed position")) 1092 goto err; 1093 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.new_raw_weight, 1094 "new_raw_weight", "weight of new raw position")) 1095 goto err; 1096 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_remainder, 1097 "motion_remainder", "remember motion division remainder")) 1098 goto err; 1099 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_threshold, 1100 "motion_threshold", "threshold before finger moves cursor")) 1101 goto err; 1102 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_multiplier, 1103 "motion_multiplier", "numerator of motion scale")) 1104 goto err; 1105 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_divisor, 1106 "motion_divisor", "divisor of motion scale")) 1107 goto err; 1108 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_threshold, 1109 "fast_motion_threshold", "threshold before fast motion")) 1110 goto err; 1111 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_multiplier, 1112 "fast_motion_multiplier", "numerator of fast motion scale")) 1113 goto err; 1114 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_divisor, 1115 "fast_motion_divisor", "divisor of fast motion scale")) 1116 goto err; 1117 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_per_direction, 1118 "fast_per_direction", "don't frobnitz the veeblefitzer!")) 1119 goto err; 1120 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_delay, 1121 "motion_delay", "number of packets before motion kicks in")) 1122 goto err; 1123 1124 /* 1126 * Tapping. 1127 */ 1128 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.tap_limit_msec, 1129 "tap_limit_msec", "milliseconds before a touch is not a tap")) 1130 goto err; 1131 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.double_tap_limit_msec, 1132 "double_tap_limit_msec", 1133 "milliseconds before a second tap keeps the button down")) 1134 goto err; 1135 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.one_finger_tap_buttons, 1136 "one_finger_tap_buttons", "buttons for one-finger taps")) 1137 goto err; 1138 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.two_finger_tap_buttons, 1139 "two_finger_tap_buttons", "buttons for two-finger taps")) 1140 goto err; 1141 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.three_finger_tap_buttons, 1142 "three_finger_tap_buttons", "buttons for three-finger taps")) 1143 goto err; 1144 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.tap_track_distance_limit, 1145 "tap_track_distance_limit", 1146 "maximum distance^2 of tracking during tap")) 1147 goto err; 1148 1149 return; 1150 1151 err: 1152 sysctl_teardown(&sc->sc_log); 1153 sc->sc_node = NULL; 1154 } 1155 1156 static bool 1157 uatp_setup_sysctl_knob(struct uatp_softc *sc, int *ptr, const char *name, 1158 const char *description) 1159 { 1160 int error; 1161 1162 error = sysctl_createv(&sc->sc_log, 0, NULL, NULL, CTLFLAG_READWRITE, 1163 CTLTYPE_INT, name, SYSCTL_DESCR(description), 1164 NULL, 0, ptr, 0, 1165 CTL_HW, sc->sc_node->sysctl_num, CTL_CREATE, CTL_EOL); 1166 if (error != 0) { 1167 aprint_error_dev(uatp_dev(sc), 1168 "unable to setup sysctl node hw.%s.%s: %d\n", 1169 device_xname(uatp_dev(sc)), name, error); 1170 return false; 1171 } 1172 1173 return true; 1174 } 1175 1176 /* More driver goop */ 1178 1179 static void 1180 uatp_childdet(device_t self, device_t child) 1181 { 1182 struct uatp_softc *sc = device_private(self); 1183 1184 DPRINTF(sc, UATP_DEBUG_MISC, ("detaching child %s\n", 1185 device_xname(child))); 1186 1187 /* Our only child is the wsmouse device. */ 1188 if (child == sc->sc_wsmousedev) 1189 sc->sc_wsmousedev = NULL; 1190 } 1191 1192 static int 1193 uatp_detach(device_t self, int flags) 1194 { 1195 struct uatp_softc *sc = device_private(self); 1196 1197 DPRINTF(sc, UATP_DEBUG_MISC, ("detaching with flags %d\n", flags)); 1198 1199 if (sc->sc_status & UATP_ENABLED) { 1200 aprint_error_dev(uatp_dev(sc), "can't detach while enabled\n"); 1201 return EBUSY; 1202 } 1203 1204 if (sc->sc_parameters->finalize) { 1205 int error = sc->sc_parameters->finalize(sc); 1206 if (error != 0) 1207 return error; 1208 } 1209 1210 pmf_device_deregister(self); 1211 1212 sysctl_teardown(&sc->sc_log); 1213 sc->sc_node = NULL; 1214 1215 tap_finalize(sc); 1216 1217 return config_detach_children(self, flags); 1218 } 1219 1220 static int 1221 uatp_activate(device_t self, enum devact act) 1222 { 1223 struct uatp_softc *sc = device_private(self); 1224 1225 DPRINTF(sc, UATP_DEBUG_MISC, ("act %d\n", (int)act)); 1226 1227 if (act != DVACT_DEACTIVATE) 1228 return EOPNOTSUPP; 1229 1230 sc->sc_status |= UATP_DYING; 1231 1232 return 0; 1233 } 1234 1235 /* wsmouse routines */ 1237 1238 static int 1239 uatp_enable(void *v) 1240 { 1241 struct uatp_softc *sc = v; 1242 1243 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("enabling wsmouse\n")); 1244 1245 /* Refuse to enable if we've been deactivated. */ 1246 if (sc->sc_status & UATP_DYING) { 1247 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("busy dying\n")); 1248 return EIO; 1249 } 1250 1251 /* Refuse to enable if we already are enabled. */ 1252 if (sc->sc_status & UATP_ENABLED) { 1253 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("already enabled\n")); 1254 return EBUSY; 1255 } 1256 1257 sc->sc_status |= UATP_ENABLED; 1258 sc->sc_status &=~ UATP_VALID; 1259 sc->sc_input_index = 0; 1260 tap_enable(sc); 1261 uatp_clear_position(sc); 1262 1263 DPRINTF(sc, UATP_DEBUG_MISC, ("uhidev_open(%p)\n", &sc->sc_hdev)); 1264 return uhidev_open(&sc->sc_hdev); 1265 } 1266 1267 static void 1268 uatp_disable(void *v) 1269 { 1270 struct uatp_softc *sc = v; 1271 1272 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("disabling wsmouse\n")); 1273 1274 if (!(sc->sc_status & UATP_ENABLED)) { 1275 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("not enabled\n")); 1276 return; 1277 } 1278 1279 tap_disable(sc); 1280 sc->sc_status &=~ UATP_ENABLED; 1281 1282 DPRINTF(sc, UATP_DEBUG_MISC, ("uhidev_close(%p)\n", &sc->sc_hdev)); 1283 uhidev_close(&sc->sc_hdev); 1284 } 1285 1286 static int 1287 uatp_ioctl(void *v, unsigned long cmd, void *data, int flag, struct lwp *p) 1288 { 1289 1290 DPRINTF((struct uatp_softc*)v, UATP_DEBUG_IOCTL, 1291 ("cmd %lx, data %p, flag %x, lwp %p\n", cmd, data, flag, p)); 1292 1293 /* XXX Implement any relevant wsmouse(4) ioctls. */ 1294 return EPASSTHROUGH; 1295 } 1296 1297 /* 1299 * The Geyser 3 and 4 models talk the generic USB HID mouse protocol by 1300 * default. This mode switch makes them give raw sensor data instead 1301 * so that we can implement tapping, two-finger scrolling, &c. 1302 */ 1303 1304 #define GEYSER34_RAW_MODE 0x04 1305 #define GEYSER34_MODE_REPORT_ID 0 1306 #define GEYSER34_MODE_INTERFACE 0 1307 #define GEYSER34_MODE_PACKET_SIZE 8 1308 1309 static void 1310 geyser34_enable_raw_mode(struct uatp_softc *sc) 1311 { 1312 usbd_device_handle udev = sc->sc_hdev.sc_parent->sc_udev; 1313 usb_device_request_t req; 1314 usbd_status status; 1315 uint8_t report[GEYSER34_MODE_PACKET_SIZE]; 1316 1317 req.bmRequestType = UT_READ_CLASS_INTERFACE; 1318 req.bRequest = UR_GET_REPORT; 1319 USETW2(req.wValue, UHID_FEATURE_REPORT, GEYSER34_MODE_REPORT_ID); 1320 USETW(req.wIndex, GEYSER34_MODE_INTERFACE); 1321 USETW(req.wLength, GEYSER34_MODE_PACKET_SIZE); 1322 1323 DPRINTF(sc, UATP_DEBUG_RESET, ("get feature report\n")); 1324 status = usbd_do_request(udev, &req, report); 1325 if (status != USBD_NORMAL_COMPLETION) { 1326 aprint_error_dev(uatp_dev(sc), 1327 "error reading feature report: %s\n", usbd_errstr(status)); 1328 return; 1329 } 1330 1331 #if UATP_DEBUG 1333 if (sc->sc_debug_flags & UATP_DEBUG_RESET) { 1334 unsigned int i; 1335 DPRINTF(sc, UATP_DEBUG_RESET, ("old feature report:")); 1336 for (i = 0; i < GEYSER34_MODE_PACKET_SIZE; i++) 1337 printf(" %02x", (unsigned int)report[i]); 1338 printf("\n"); 1339 /* Doing this twice is harmless here and lets this be 1340 * one ifdef. */ 1341 report[0] = GEYSER34_RAW_MODE; 1342 DPRINTF(sc, UATP_DEBUG_RESET, ("new feature report:")); 1343 for (i = 0; i < GEYSER34_MODE_PACKET_SIZE; i++) 1344 printf(" %02x", (unsigned int)report[i]); 1345 printf("\n"); 1346 } 1347 #endif 1348 1349 report[0] = GEYSER34_RAW_MODE; 1350 1351 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 1352 req.bRequest = UR_SET_REPORT; 1353 USETW2(req.wValue, UHID_FEATURE_REPORT, GEYSER34_MODE_REPORT_ID); 1354 USETW(req.wIndex, GEYSER34_MODE_INTERFACE); 1355 USETW(req.wLength, GEYSER34_MODE_PACKET_SIZE); 1356 1357 DPRINTF(sc, UATP_DEBUG_RESET, ("set feature report\n")); 1358 status = usbd_do_request(udev, &req, report); 1359 if (status != USBD_NORMAL_COMPLETION) { 1360 aprint_error_dev(uatp_dev(sc), 1361 "error writing feature report: %s\n", usbd_errstr(status)); 1362 return; 1363 } 1364 } 1365 1366 /* 1368 * The Geyser 3 and 4 need to be reset periodically after we detect a 1369 * continual flow of spurious interrupts. We use a USB task for this. 1370 */ 1371 1372 static void 1373 geyser34_initialize(struct uatp_softc *sc) 1374 { 1375 1376 DPRINTF(sc, UATP_DEBUG_MISC, ("initializing\n")); 1377 geyser34_enable_raw_mode(sc); 1378 usb_init_task(&sc->sc_reset_task, &geyser34_reset_task, sc, 1379 USB_TASKQ_MPSAFE); 1380 } 1381 1382 static int 1383 geyser34_finalize(struct uatp_softc *sc) 1384 { 1385 1386 DPRINTF(sc, UATP_DEBUG_MISC, ("finalizing\n")); 1387 usb_rem_task(sc->sc_hdev.sc_parent->sc_udev, &sc->sc_reset_task); 1388 1389 return 0; 1390 } 1391 1392 static void 1393 geyser34_deferred_reset(struct uatp_softc *sc) 1394 { 1395 1396 DPRINTF(sc, UATP_DEBUG_RESET, ("deferring reset\n")); 1397 usb_add_task(sc->sc_hdev.sc_parent->sc_udev, &sc->sc_reset_task, 1398 USB_TASKQ_DRIVER); 1399 } 1400 1401 static void 1402 geyser34_reset_task(void *arg) 1403 { 1404 struct uatp_softc *sc = arg; 1405 1406 DPRINTF(sc, UATP_DEBUG_RESET, ("resetting\n")); 1407 1408 /* Reset by putting it into raw mode. Not sure why. */ 1409 geyser34_enable_raw_mode(sc); 1410 } 1411 1412 /* Interrupt handler */ 1414 1415 static void 1416 uatp_intr(struct uhidev *addr, void *ibuf, unsigned int len) 1417 { 1418 struct uatp_softc *sc = (struct uatp_softc *)addr; 1419 uint8_t *input; 1420 int dx, dy, dz, dw; 1421 uint32_t buttons; 1422 1423 DPRINTF(sc, UATP_DEBUG_INTR, ("softc %p, ibuf %p, len %u\n", 1424 addr, ibuf, len)); 1425 1426 /* 1427 * Some devices break packets up into chunks, so we accumulate 1428 * input up to the expected packet length, or if it would 1429 * overflow, discard the whole packet and start over. 1430 */ 1431 if (sc->sc_input_size < len) { 1432 aprint_error_dev(uatp_dev(sc), 1433 "discarding %u-byte input packet\n", len); 1434 sc->sc_input_index = 0; 1435 return; 1436 } else if (sc->sc_input_size < (sc->sc_input_index + len)) { 1437 aprint_error_dev(uatp_dev(sc), "discarding %u-byte input\n", 1438 (sc->sc_input_index + len)); 1439 sc->sc_input_index = 0; 1440 return; 1441 } 1442 1443 #if UATP_DEBUG 1444 if (sc->sc_debug_flags & UATP_DEBUG_INTR) { 1445 unsigned int i; 1446 uint8_t *bytes = ibuf; 1447 DPRINTF(sc, UATP_DEBUG_INTR, ("raw")); 1448 for (i = 0; i < len; i++) 1449 printf(" %02x", (unsigned int)bytes[i]); 1450 printf("\n"); 1451 } 1452 #endif 1453 1454 memcpy(&sc->sc_input[sc->sc_input_index], ibuf, len); 1455 sc->sc_input_index += len; 1456 if (sc->sc_input_index != sc->sc_input_size) { 1457 /* Wait until packet is complete. */ 1458 aprint_verbose_dev(uatp_dev(sc), "partial packet: %u bytes\n", 1459 len); 1460 return; 1461 } 1462 1463 /* Clear the buffer and process the now complete packet. */ 1464 sc->sc_input_index = 0; 1465 input = sc->sc_input; 1466 1467 /* The last byte's first bit is set iff the button is pressed. 1468 * XXX Left button should have a name. */ 1469 buttons = ((input[sc->sc_input_size - 1] & UATP_STATUS_BUTTON) 1470 ? 1 : 0); 1471 1472 /* Read the sample. */ 1473 memset(uatp_x_sample(sc), 0, UATP_MAX_X_SENSORS); 1474 memset(uatp_y_sample(sc), 0, UATP_MAX_Y_SENSORS); 1475 sc->sc_parameters->read_sample(uatp_x_sample(sc), uatp_y_sample(sc), 1476 input); 1477 1478 #if UATP_DEBUG 1480 if (sc->sc_debug_flags & UATP_DEBUG_INTR) { 1481 unsigned int i; 1482 DPRINTF(sc, UATP_DEBUG_INTR, ("x sensors")); 1483 for (i = 0; i < uatp_x_sensors(sc); i++) 1484 printf(" %02x", (unsigned int)uatp_x_sample(sc)[i]); 1485 printf("\n"); 1486 DPRINTF(sc, UATP_DEBUG_INTR, ("y sensors")); 1487 for (i = 0; i < uatp_y_sensors(sc); i++) 1488 printf(" %02x", (unsigned int)uatp_y_sample(sc)[i]); 1489 printf("\n"); 1490 } else if ((sc->sc_debug_flags & UATP_DEBUG_STATUS) && 1491 (input[sc->sc_input_size - 1] &~ 1492 (UATP_STATUS_BUTTON | UATP_STATUS_BASE | 1493 UATP_STATUS_POST_RESET))) 1494 DPRINTF(sc, UATP_DEBUG_STATUS, ("status byte: %02x\n", 1495 input[sc->sc_input_size - 1])); 1496 #endif 1497 1498 /* 1499 * If this is a base sample, initialize the state to interpret 1500 * subsequent samples relative to it, and stop here. 1501 */ 1502 if (sc->sc_parameters->base_sample(sc, input)) { 1503 DPRINTF(sc, UATP_DEBUG_PARSE, 1504 ("base sample, buttons %"PRIx32"\n", buttons)); 1505 /* XXX Should the valid bit ever be reset? */ 1506 sc->sc_status |= UATP_VALID; 1507 uatp_clear_position(sc); 1508 memcpy(sc->sc_base, sc->sc_sample, sizeof(sc->sc_base)); 1509 /* XXX Perform 17" size detection like Linux? */ 1510 return; 1511 } 1512 1513 /* If not, accumulate the change in the sensors. */ 1514 sc->sc_parameters->accumulate(sc); 1515 1516 #if UATP_DEBUG 1517 if (sc->sc_debug_flags & UATP_DEBUG_ACCUMULATE) { 1518 unsigned int i; 1519 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, ("accumulated x state:")); 1520 for (i = 0; i < uatp_x_sensors(sc); i++) 1521 printf(" %02x", (unsigned int)uatp_x_acc(sc)[i]); 1522 printf("\n"); 1523 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, ("accumulated y state:")); 1524 for (i = 0; i < uatp_y_sensors(sc); i++) 1525 printf(" %02x", (unsigned int)uatp_y_acc(sc)[i]); 1526 printf("\n"); 1527 } 1528 #endif 1529 1530 /* Compute the change in coordinates and buttons. */ 1531 dx = dy = dz = dw = 0; 1532 if ((!interpret_input(sc, &dx, &dy, &dz, &dw, &buttons)) && 1533 /* If there's no input because we're releasing a button, 1534 * then it's not spurious. XXX Mutex? */ 1535 (sc->sc_buttons == 0)) { 1536 DPRINTF(sc, UATP_DEBUG_SPURINTR, ("spurious interrupt\n")); 1537 if (sc->sc_parameters->reset) 1538 sc->sc_parameters->reset(sc); 1539 return; 1540 } 1541 1542 /* Report to wsmouse. */ 1543 DPRINTF(sc, UATP_DEBUG_INTR, 1544 ("buttons %"PRIx32", dx %d, dy %d, dz %d, dw %d\n", 1545 buttons, dx, dy, dz, dw)); 1546 mutex_enter(&sc->sc_tap_mutex); 1547 uatp_input(sc, buttons, dx, dy, dz, dw); 1548 mutex_exit(&sc->sc_tap_mutex); 1549 } 1550 1551 /* 1553 * Different ways to discern the base sample initializing the state. 1554 * `base_sample_softc_flag' uses a state flag stored in the softc; 1555 * `base_sample_input_flag' checks a flag at the end of the input 1556 * packet. 1557 */ 1558 1559 static bool 1560 base_sample_softc_flag(const struct uatp_softc *sc, const uint8_t *input) 1561 { 1562 return !(sc->sc_status & UATP_VALID); 1563 } 1564 1565 static bool 1566 base_sample_input_flag(const struct uatp_softc *sc, const uint8_t *input) 1567 { 1568 /* XXX Should we also check the valid flag? */ 1569 return !!(input[sc->sc_input_size - 1] & UATP_STATUS_BASE); 1570 } 1571 1572 /* 1573 * Pick apart the horizontal sensors from the vertical sensors. 1574 * Different models interleave them in different orders. 1575 */ 1576 1577 static void 1578 read_sample_1(uint8_t *x, uint8_t *y, const uint8_t *input) 1579 { 1580 unsigned int i; 1581 1582 for (i = 0; i < 8; i++) { 1583 x[i] = input[5 * i + 2]; 1584 x[i + 8] = input[5 * i + 4]; 1585 x[i + 16] = input[5 * i + 42]; 1586 if (i < 2) 1587 x[i + 24] = input[5 * i + 44]; 1588 1589 y[i] = input[5 * i + 1]; 1590 y[i + 8] = input[5 * i + 3]; 1591 } 1592 } 1593 1594 static void 1595 read_sample_2(uint8_t *x, uint8_t *y, const uint8_t *input) 1596 { 1597 unsigned int i, j; 1598 1599 for (i = 0, j = 19; i < 20; i += 2, j += 3) { 1600 x[i] = input[j]; 1601 x[i + 1] = input[j + 1]; 1602 } 1603 1604 for (i = 0, j = 1; i < 9; i += 2, j += 3) { 1605 y[i] = input[j]; 1606 y[i + 1] = input[j + 1]; 1607 } 1608 } 1609 1610 static void 1612 accumulate_sample_1(struct uatp_softc *sc) 1613 { 1614 unsigned int i; 1615 1616 for (i = 0; i < UATP_SENSORS; i++) { 1617 sc->sc_acc[i] += (int8_t)(sc->sc_sample[i] - sc->sc_base[i]); 1618 if (sc->sc_acc[i] < 0) { 1619 sc->sc_acc[i] = 0; 1620 } else if (UATP_MAX_ACC < sc->sc_acc[i]) { 1621 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1622 ("overflow %d\n", sc->sc_acc[i])); 1623 sc->sc_acc[i] = UATP_MAX_ACC; 1624 } 1625 } 1626 1627 memcpy(sc->sc_base, sc->sc_sample, sizeof(sc->sc_base)); 1628 } 1629 1630 static void 1631 accumulate_sample_2(struct uatp_softc *sc) 1632 { 1633 unsigned int i; 1634 1635 for (i = 0; i < UATP_SENSORS; i++) { 1636 sc->sc_acc[i] = (int8_t)(sc->sc_sample[i] - sc->sc_base[i]); 1637 if (sc->sc_acc[i] < -0x80) { 1638 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1639 ("underflow %u - %u = %d\n", 1640 (unsigned int)sc->sc_sample[i], 1641 (unsigned int)sc->sc_base[i], 1642 sc->sc_acc[i])); 1643 sc->sc_acc[i] += 0x100; 1644 } 1645 if (0x7f < sc->sc_acc[i]) { 1646 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1647 ("overflow %u - %u = %d\n", 1648 (unsigned int)sc->sc_sample[i], 1649 (unsigned int)sc->sc_base[i], 1650 sc->sc_acc[i])); 1651 sc->sc_acc[i] -= 0x100; 1652 } 1653 if (sc->sc_acc[i] < 0) 1654 sc->sc_acc[i] = 0; 1655 } 1656 } 1657 1658 /* 1660 * Report input to wsmouse, if there is anything interesting to report. 1661 * We must take into consideration the current tap-and-drag button 1662 * state. 1663 */ 1664 1665 static void 1666 uatp_input(struct uatp_softc *sc, uint32_t buttons, 1667 int dx, int dy, int dz, int dw) 1668 { 1669 uint32_t all_buttons; 1670 1671 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 1672 all_buttons = buttons | uatp_tapped_buttons(sc); 1673 1674 if ((sc->sc_wsmousedev != NULL) && 1675 ((dx != 0) || (dy != 0) || (dz != 0) || (dw != 0) || 1676 (all_buttons != sc->sc_all_buttons))) { 1677 int s = spltty(); 1678 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("wsmouse input:" 1679 " buttons %"PRIx32", dx %d, dy %d, dz %d, dw %d\n", 1680 all_buttons, dx, -dy, dz, -dw)); 1681 wsmouse_input(sc->sc_wsmousedev, all_buttons, dx, -dy, dz, -dw, 1682 WSMOUSE_INPUT_DELTA); 1683 splx(s); 1684 } 1685 sc->sc_buttons = buttons; 1686 sc->sc_all_buttons = all_buttons; 1687 } 1688 1689 /* 1690 * Interpret the current tap state to decide whether the tap buttons 1691 * are currently pressed. 1692 */ 1693 1694 static uint32_t 1695 uatp_tapped_buttons(struct uatp_softc *sc) 1696 { 1697 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 1698 switch (sc->sc_tap_state) { 1699 case TAP_STATE_INITIAL: 1700 case TAP_STATE_TAPPING: 1701 return 0; 1702 1703 case TAP_STATE_TAPPED: 1704 case TAP_STATE_DOUBLE_TAPPING: 1705 case TAP_STATE_DRAGGING_DOWN: 1706 case TAP_STATE_DRAGGING_UP: 1707 case TAP_STATE_TAPPING_IN_DRAG: 1708 CHECK((0 < sc->sc_tapped_fingers), return 0); 1709 switch (sc->sc_tapped_fingers) { 1710 case 1: return sc->sc_knobs.one_finger_tap_buttons; 1711 case 2: return sc->sc_knobs.two_finger_tap_buttons; 1712 case 3: 1713 default: return sc->sc_knobs.three_finger_tap_buttons; 1714 } 1715 1716 default: 1717 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 1718 __func__, sc->sc_tap_state); 1719 return 0; 1720 } 1721 } 1722 1723 /* 1725 * Interpret the current input state to find a difference in all the 1726 * relevant coordinates and buttons to pass on to wsmouse, and update 1727 * any internal driver state necessary to interpret subsequent input 1728 * relative to this one. 1729 */ 1730 1731 static bool 1732 interpret_input(struct uatp_softc *sc, int *dx, int *dy, int *dz, int *dw, 1733 uint32_t *buttons) 1734 { 1735 unsigned int x_pressure, x_raw, x_fingers; 1736 unsigned int y_pressure, y_raw, y_fingers; 1737 unsigned int fingers; 1738 1739 x_pressure = interpret_dimension(sc, uatp_x_acc(sc), 1740 uatp_x_sensors(sc), uatp_x_ratio(sc), &x_raw, &x_fingers); 1741 y_pressure = interpret_dimension(sc, uatp_y_acc(sc), 1742 uatp_y_sensors(sc), uatp_y_ratio(sc), &y_raw, &y_fingers); 1743 1744 DPRINTF(sc, UATP_DEBUG_PARSE, 1745 ("x %u @ %u, %uf; y %u @ %u, %uf; buttons %"PRIx32"\n", 1746 x_pressure, x_raw, x_fingers, 1747 y_pressure, y_raw, y_fingers, 1748 *buttons)); 1749 1750 if ((x_pressure == 0) && (y_pressure == 0)) { 1751 bool ok; 1752 /* No fingers: clear position and maybe report a tap. */ 1753 DPRINTF(sc, UATP_DEBUG_INTR, 1754 ("no position detected; clearing position\n")); 1755 if (*buttons == 0) { 1756 ok = tap_released(sc); 1757 } else { 1758 tap_reset(sc); 1759 /* Button pressed: interrupt is not spurious. */ 1760 ok = true; 1761 } 1762 /* 1763 * Don't clear the position until after tap_released, 1764 * which needs to know the track distance. 1765 */ 1766 uatp_clear_position(sc); 1767 return ok; 1768 } else if ((x_pressure == 0) || (y_pressure == 0)) { 1769 /* XXX What to do here? */ 1770 DPRINTF(sc, UATP_DEBUG_INTR, 1771 ("pressure in only one dimension; ignoring\n")); 1772 return true; 1773 } else if ((x_pressure == 1) && (y_pressure == 1)) { 1774 fingers = max(x_fingers, y_fingers); 1775 CHECK((0 < fingers), return false); 1776 if (*buttons == 0) 1777 tap_touched(sc, fingers); 1778 else if (fingers == 1) 1779 tap_reset(sc); 1780 else /* Multiple fingers, button pressed. */ 1781 *buttons = emulated_buttons(sc, fingers); 1782 update_position(sc, fingers, x_raw, y_raw, dx, dy, dz, dw); 1783 return true; 1784 } else { 1785 /* Palm detected in either or both of the dimensions. */ 1786 DPRINTF(sc, UATP_DEBUG_INTR, ("palm detected; ignoring\n")); 1787 return true; 1788 } 1789 } 1790 1791 /* 1793 * Interpret the accumulated sensor state along one dimension to find 1794 * the number, mean position, and pressure of fingers. Returns 0 to 1795 * indicate no pressure, returns 1 and sets *position and *fingers to 1796 * indicate fingers, and returns 2 to indicate palm. 1797 * 1798 * XXX Give symbolic names to the return values. 1799 */ 1800 1801 static unsigned int 1802 interpret_dimension(struct uatp_softc *sc, const int *acc, 1803 unsigned int n_sensors, unsigned int ratio, 1804 unsigned int *position, unsigned int *fingers) 1805 { 1806 unsigned int i, v, n_fingers, sum; 1807 unsigned int total[UATP_MAX_SENSORS]; 1808 unsigned int weighted[UATP_MAX_SENSORS]; 1809 unsigned int sensor_threshold = sc->sc_knobs.sensor_threshold; 1810 unsigned int sensor_normalizer = sc->sc_knobs.sensor_normalizer; 1811 unsigned int width = 0; /* GCC is not smart enough. */ 1812 unsigned int palm_width = sc->sc_knobs.palm_width; 1813 enum { none, nondecreasing, decreasing } state = none; 1814 1815 if (sensor_threshold < sensor_normalizer) 1816 sensor_normalizer = sensor_threshold; 1817 if (palm_width == 0) /* Effectively disable palm detection. */ 1818 palm_width = UATP_MAX_POSITION; 1819 1820 #define CHECK_(condition) CHECK(condition, return 0) 1821 1822 /* 1823 * Arithmetic bounds: 1824 * . n_sensors is at most UATP_MAX_SENSORS, 1825 * . n_fingers is at most UATP_MAX_SENSORS, 1826 * . i is at most UATP_MAX_SENSORS, 1827 * . sc->sc_acc[i] is at most UATP_MAX_ACC, 1828 * . i * sc->sc_acc[i] is at most UATP_MAX_SENSORS * UATP_MAX_ACC, 1829 * . each total[j] is at most UATP_MAX_SENSORS * UATP_MAX_ACC, 1830 * . each weighted[j] is at most UATP_MAX_SENSORS^2 * UATP_MAX_ACC, 1831 * . ratio is at most UATP_MAX_RATIO, 1832 * . each weighted[j] * ratio is at most 1833 * UATP_MAX_SENSORS^2 * UATP_MAX_ACC * UATP_MAX_RATIO, 1834 * which is #x5fa0000 with the current values of the constants, 1835 * and 1836 * . the sum of the positions is at most 1837 * UATP_MAX_SENSORS * UATP_MAX_POSITION, 1838 * which is #x60000 with the current values of the constants. 1839 * Hence all of the arithmetic here fits in int (and thus also 1840 * unsigned int). If you change the constants, though, you 1841 * must update the analysis. 1842 */ 1843 __CTASSERT(0x5fa0000 == (UATP_MAX_SENSORS * UATP_MAX_SENSORS * 1844 UATP_MAX_ACC * UATP_MAX_RATIO)); 1845 __CTASSERT(0x60000 == (UATP_MAX_SENSORS * UATP_MAX_POSITION)); 1846 CHECK_(n_sensors <= UATP_MAX_SENSORS); 1847 CHECK_(ratio <= UATP_MAX_RATIO); 1848 1849 /* 1850 * Detect each finger by looking for a consecutive sequence of 1851 * increasing and then decreasing pressures above the sensor 1852 * threshold. Compute the finger's position as the weighted 1853 * average of positions, weighted by the pressure at that 1854 * position. Finally, return the average finger position. 1855 */ 1856 1857 n_fingers = 0; 1858 memset(weighted, 0, sizeof weighted); 1859 memset(total, 0, sizeof total); 1860 1861 for (i = 0; i < n_sensors; i++) { 1863 CHECK_(0 <= acc[i]); 1864 v = acc[i]; 1865 1866 /* Ignore values outside a sensible interval. */ 1867 if (v <= sensor_threshold) { 1868 state = none; 1869 continue; 1870 } else if (UATP_MAX_ACC < v) { 1871 aprint_verbose_dev(uatp_dev(sc), 1872 "ignoring large accumulated sensor state: %u\n", 1873 v); 1874 continue; 1875 } 1876 1877 switch (state) { 1878 case none: 1879 n_fingers += 1; 1880 CHECK_(n_fingers <= n_sensors); 1881 state = nondecreasing; 1882 width = 1; 1883 break; 1884 1885 case nondecreasing: 1886 case decreasing: 1887 CHECK_(0 < i); 1888 CHECK_(0 <= acc[i - 1]); 1889 width += 1; 1890 if (palm_width <= (width * ratio)) { 1891 DPRINTF(sc, UATP_DEBUG_PALM, 1892 ("palm detected\n")); 1893 return 2; 1894 } else if ((state == nondecreasing) && 1895 ((unsigned int)acc[i - 1] > v)) { 1896 state = decreasing; 1897 } else if ((state == decreasing) && 1898 ((unsigned int)acc[i - 1] < v)) { 1899 n_fingers += 1; 1900 CHECK_(n_fingers <= n_sensors); 1901 state = nondecreasing; 1902 width = 1; 1903 } 1904 break; 1905 1906 default: 1907 aprint_error_dev(uatp_dev(sc), 1908 "bad finger detection state: %d", state); 1909 return 0; 1910 } 1911 1912 v -= sensor_normalizer; 1913 total[n_fingers - 1] += v; 1914 weighted[n_fingers - 1] += (i * v); 1915 CHECK_(total[n_fingers - 1] <= 1916 (UATP_MAX_SENSORS * UATP_MAX_ACC)); 1917 CHECK_(weighted[n_fingers - 1] <= 1918 (UATP_MAX_SENSORS * UATP_MAX_SENSORS * UATP_MAX_ACC)); 1919 } 1920 1921 if (n_fingers == 0) 1922 return 0; 1923 1924 sum = 0; 1925 for (i = 0; i < n_fingers; i++) { 1926 DPRINTF(sc, UATP_DEBUG_PARSE, 1927 ("finger at %u\n", ((weighted[i] * ratio) / total[i]))); 1928 sum += ((weighted[i] * ratio) / total[i]); 1929 CHECK_(sum <= UATP_MAX_SENSORS * UATP_MAX_POSITION); 1930 } 1931 1932 *fingers = n_fingers; 1933 *position = (sum / n_fingers); 1934 return 1; 1935 1936 #undef CHECK_ 1937 } 1938 1939 /* Tapping */ 1941 1942 /* 1943 * There is a very hairy state machine for detecting taps. At every 1944 * touch, we record the maximum number of fingers touched, and don't 1945 * reset it to zero until the finger is released. 1946 * 1947 * INITIAL STATE 1948 * (no tapping fingers; no tapped fingers) 1949 * - On touch, go to TAPPING STATE. 1950 * - On any other input, remain in INITIAL STATE. 1951 * 1952 * TAPPING STATE: Finger touched; might be tap. 1953 * (tapping fingers; no tapped fingers) 1954 * - On release within the tap limit, go to TAPPED STATE. 1955 * - On release after the tap limit, go to INITIAL STATE. 1956 * - On any other input, remain in TAPPING STATE. 1957 * 1958 * TAPPED STATE: Finger recently tapped, and might double-tap. 1959 * (no tapping fingers; tapped fingers) 1960 * - On touch within the double-tap limit, go to DOUBLE-TAPPING STATE. 1961 * - On touch after the double-tap limit, go to TAPPING STATE. 1962 * - On no event after the double-tap limit, go to INITIAL STATE. 1963 * - On any other input, remain in TAPPED STATE. 1964 * 1965 * DOUBLE-TAPPING STATE: Finger touched soon after tap; might be double-tap. 1966 * (tapping fingers; tapped fingers) 1967 * - On release within the tap limit, release button and go to TAPPED STATE. 1968 * - On release after the tap limit, go to DRAGGING UP STATE. 1969 * - On touch after the tap limit, go to DRAGGING DOWN STATE. 1970 * - On any other input, remain in DOUBLE-TAPPING STATE. 1971 * 1972 * DRAGGING DOWN STATE: Finger has double-tapped and is dragging, not tapping. 1973 * (no tapping fingers; tapped fingers) 1974 * - On release, go to DRAGGING UP STATE. 1975 * - On any other input, remain in DRAGGING DOWN STATE. 1976 * 1977 * DRAGGING UP STATE: Finger has double-tapped and is up. 1978 * (no tapping fingers; tapped fingers) 1979 * - On touch, go to TAPPING IN DRAG STATE. 1980 * - On any other input, remain in DRAGGING UP STATE. 1981 * 1982 * TAPPING IN DRAG STATE: Tap-dancing while cross-dressed. 1983 * (tapping fingers; tapped fingers) 1984 * - On release within the tap limit, go to TAPPED STATE. 1985 * - On release after the tap limit, go to DRAGGING UP STATE. 1986 * - On any other input, remain in TAPPING IN DRAG STATE. 1987 * 1988 * Warning: The graph of states is split into two components, those 1989 * with tapped fingers and those without. The only path from any state 1990 * without tapped fingers to a state with tapped fingers must pass 1991 * through TAPPED STATE. Also, the only transitions into TAPPED STATE 1992 * must be from states with tapping fingers, which become the tapped 1993 * fingers. If you edit the state machine, you must either preserve 1994 * these properties, or globally transform the state machine to avoid 1995 * the bad consequences of violating these properties. 1996 */ 1997 1998 static void 2000 uatp_tap_limit(const struct uatp_softc *sc, struct timeval *limit) 2001 { 2002 unsigned int msec = sc->sc_knobs.tap_limit_msec; 2003 limit->tv_sec = 0; 2004 limit->tv_usec = ((msec < 1000) ? (1000 * msec) : 100000); 2005 } 2006 2007 #if UATP_DEBUG 2008 2009 # define TAP_DEBUG_PRE(sc) tap_debug((sc), __func__, "") 2010 # define TAP_DEBUG_POST(sc) tap_debug((sc), __func__, " ->") 2011 2012 static void 2013 tap_debug(struct uatp_softc *sc, const char *caller, const char *prefix) 2014 { 2015 char buffer[128]; 2016 const char *state; 2017 2018 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 2019 switch (sc->sc_tap_state) { 2020 case TAP_STATE_INITIAL: state = "initial"; break; 2021 case TAP_STATE_TAPPING: state = "tapping"; break; 2022 case TAP_STATE_TAPPED: state = "tapped"; break; 2023 case TAP_STATE_DOUBLE_TAPPING: state = "double-tapping"; break; 2024 case TAP_STATE_DRAGGING_DOWN: state = "dragging-down"; break; 2025 case TAP_STATE_DRAGGING_UP: state = "dragging-up"; break; 2026 case TAP_STATE_TAPPING_IN_DRAG: state = "tapping-in-drag"; break; 2027 default: 2028 snprintf(buffer, sizeof buffer, "unknown (%d)", 2029 sc->sc_tap_state); 2030 state = buffer; 2031 break; 2032 } 2033 2034 DPRINTF(sc, UATP_DEBUG_TAP, 2035 ("%s:%s state %s, %u tapping, %u tapped\n", 2036 caller, prefix, state, 2037 sc->sc_tapping_fingers, sc->sc_tapped_fingers)); 2038 } 2039 2040 #else /* !UATP_DEBUG */ 2041 2042 # define TAP_DEBUG_PRE(sc) do {} while (0) 2043 # define TAP_DEBUG_POST(sc) do {} while (0) 2044 2045 #endif 2046 2047 static void 2049 tap_initialize(struct uatp_softc *sc) 2050 { 2051 callout_init(&sc->sc_untap_callout, CALLOUT_MPSAFE); 2052 callout_setfunc(&sc->sc_untap_callout, untap_callout, sc); 2053 mutex_init(&sc->sc_tap_mutex, MUTEX_DEFAULT, IPL_USB); 2054 cv_init(&sc->sc_tap_cv, "uatptap"); 2055 } 2056 2057 static void 2058 tap_finalize(struct uatp_softc *sc) 2059 { 2060 /* XXX Can the callout still be scheduled here? */ 2061 callout_destroy(&sc->sc_untap_callout); 2062 mutex_destroy(&sc->sc_tap_mutex); 2063 cv_destroy(&sc->sc_tap_cv); 2064 } 2065 2066 static void 2067 tap_enable(struct uatp_softc *sc) 2068 { 2069 mutex_enter(&sc->sc_tap_mutex); 2070 tap_transition_initial(sc); 2071 sc->sc_buttons = 0; /* XXX Not the right place? */ 2072 sc->sc_all_buttons = 0; 2073 mutex_exit(&sc->sc_tap_mutex); 2074 } 2075 2076 static void 2077 tap_disable(struct uatp_softc *sc) 2078 { 2079 /* Reset tapping, and wait for any callouts to complete. */ 2080 tap_reset_wait(sc); 2081 } 2082 2083 /* 2084 * Reset tap state. If the untap callout has just fired, it may signal 2085 * a harmless button release event before this returns. 2086 */ 2087 2088 static void 2089 tap_reset(struct uatp_softc *sc) 2090 { 2091 callout_stop(&sc->sc_untap_callout); 2092 mutex_enter(&sc->sc_tap_mutex); 2093 tap_transition_initial(sc); 2094 mutex_exit(&sc->sc_tap_mutex); 2095 } 2096 2097 /* Reset, but don't return until the callout is done running. */ 2098 2099 static void 2100 tap_reset_wait(struct uatp_softc *sc) 2101 { 2102 bool fired = callout_stop(&sc->sc_untap_callout); 2103 2104 mutex_enter(&sc->sc_tap_mutex); 2105 if (fired) 2106 while (sc->sc_tap_state == TAP_STATE_TAPPED) 2107 if (cv_timedwait(&sc->sc_tap_cv, &sc->sc_tap_mutex, 2108 mstohz(1000))) { 2109 aprint_error_dev(uatp_dev(sc), 2110 "tap timeout\n"); 2111 break; 2112 } 2113 if (sc->sc_tap_state == TAP_STATE_TAPPED) 2114 aprint_error_dev(uatp_dev(sc), "%s error\n", __func__); 2115 tap_transition_initial(sc); 2116 mutex_exit(&sc->sc_tap_mutex); 2117 } 2118 2119 static const struct timeval zero_timeval; 2121 2122 static void 2123 tap_transition(struct uatp_softc *sc, enum uatp_tap_state tap_state, 2124 const struct timeval *start_time, 2125 unsigned int tapping_fingers, unsigned int tapped_fingers) 2126 { 2127 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 2128 sc->sc_tap_state = tap_state; 2129 sc->sc_tap_timer = *start_time; 2130 sc->sc_tapping_fingers = tapping_fingers; 2131 sc->sc_tapped_fingers = tapped_fingers; 2132 } 2133 2134 static void 2135 tap_transition_initial(struct uatp_softc *sc) 2136 { 2137 /* 2138 * No checks. This state is always kosher, and sometimes a 2139 * fallback in case of failure. 2140 */ 2141 tap_transition(sc, TAP_STATE_INITIAL, &zero_timeval, 0, 0); 2142 } 2143 2144 /* Touch transitions */ 2145 2146 static void 2147 tap_transition_tapping(struct uatp_softc *sc, const struct timeval *start_time, 2148 unsigned int fingers) 2149 { 2150 CHECK((sc->sc_tapping_fingers <= fingers), 2151 do { tap_transition_initial(sc); return; } while (0)); 2152 tap_transition(sc, TAP_STATE_TAPPING, start_time, fingers, 0); 2153 } 2154 2155 static void 2156 tap_transition_double_tapping(struct uatp_softc *sc, 2157 const struct timeval *start_time, unsigned int fingers) 2158 { 2159 CHECK((sc->sc_tapping_fingers <= fingers), 2160 do { tap_transition_initial(sc); return; } while (0)); 2161 CHECK((0 < sc->sc_tapped_fingers), 2162 do { tap_transition_initial(sc); return; } while (0)); 2163 tap_transition(sc, TAP_STATE_DOUBLE_TAPPING, start_time, fingers, 2164 sc->sc_tapped_fingers); 2165 } 2166 2167 static void 2169 tap_transition_dragging_down(struct uatp_softc *sc) 2170 { 2171 CHECK((0 < sc->sc_tapped_fingers), 2172 do { tap_transition_initial(sc); return; } while (0)); 2173 tap_transition(sc, TAP_STATE_DRAGGING_DOWN, &zero_timeval, 0, 2174 sc->sc_tapped_fingers); 2175 } 2176 2177 static void 2178 tap_transition_tapping_in_drag(struct uatp_softc *sc, 2179 const struct timeval *start_time, unsigned int fingers) 2180 { 2181 CHECK((sc->sc_tapping_fingers <= fingers), 2182 do { tap_transition_initial(sc); return; } while (0)); 2183 CHECK((0 < sc->sc_tapped_fingers), 2184 do { tap_transition_initial(sc); return; } while (0)); 2185 tap_transition(sc, TAP_STATE_TAPPING_IN_DRAG, start_time, fingers, 2186 sc->sc_tapped_fingers); 2187 } 2188 2189 /* Release transitions */ 2190 2191 static void 2192 tap_transition_tapped(struct uatp_softc *sc, const struct timeval *start_time) 2193 { 2194 /* 2195 * The fingers that were tapping -- of which there must have 2196 * been at least one -- are now the fingers that have tapped, 2197 * and there are no longer fingers tapping. 2198 */ 2199 CHECK((0 < sc->sc_tapping_fingers), 2200 do { tap_transition_initial(sc); return; } while (0)); 2201 tap_transition(sc, TAP_STATE_TAPPED, start_time, 0, 2202 sc->sc_tapping_fingers); 2203 schedule_untap(sc); 2204 } 2205 2206 static void 2207 tap_transition_dragging_up(struct uatp_softc *sc) 2208 { 2209 CHECK((0 < sc->sc_tapped_fingers), 2210 do { tap_transition_initial(sc); return; } while (0)); 2211 tap_transition(sc, TAP_STATE_DRAGGING_UP, &zero_timeval, 0, 2212 sc->sc_tapped_fingers); 2213 } 2214 2215 static void 2217 tap_touched(struct uatp_softc *sc, unsigned int fingers) 2218 { 2219 struct timeval now, diff, limit; 2220 2221 CHECK((0 < fingers), return); 2222 callout_stop(&sc->sc_untap_callout); 2223 mutex_enter(&sc->sc_tap_mutex); 2224 TAP_DEBUG_PRE(sc); 2225 /* 2226 * Guarantee that the number of tapping fingers never decreases 2227 * except when it is reset to zero on release. 2228 */ 2229 if (fingers < sc->sc_tapping_fingers) 2230 fingers = sc->sc_tapping_fingers; 2231 switch (sc->sc_tap_state) { 2232 case TAP_STATE_INITIAL: 2233 getmicrouptime(&now); 2234 tap_transition_tapping(sc, &now, fingers); 2235 break; 2236 2237 case TAP_STATE_TAPPING: 2238 /* 2239 * Number of fingers may have increased, so transition 2240 * even though we're already in TAPPING. 2241 */ 2242 tap_transition_tapping(sc, &sc->sc_tap_timer, fingers); 2243 break; 2244 2245 case TAP_STATE_TAPPED: 2246 getmicrouptime(&now); 2247 /* 2248 * If the double-tap time limit has passed, it's the 2249 * callout's responsibility to handle that event, so we 2250 * assume the limit has not passed yet. 2251 */ 2252 tap_transition_double_tapping(sc, &now, fingers); 2253 break; 2254 2255 case TAP_STATE_DOUBLE_TAPPING: 2256 getmicrouptime(&now); 2257 timersub(&now, &sc->sc_tap_timer, &diff); 2258 uatp_tap_limit(sc, &limit); 2259 if (timercmp(&diff, &limit, >) || 2260 (sc->sc_track_distance > 2261 sc->sc_knobs.tap_track_distance_limit)) 2262 tap_transition_dragging_down(sc); 2263 break; 2264 2265 case TAP_STATE_DRAGGING_DOWN: 2266 break; 2267 2268 case TAP_STATE_DRAGGING_UP: 2269 getmicrouptime(&now); 2270 tap_transition_tapping_in_drag(sc, &now, fingers); 2271 break; 2272 2273 case TAP_STATE_TAPPING_IN_DRAG: 2274 /* 2275 * Number of fingers may have increased, so transition 2276 * even though we're already in TAPPING IN DRAG. 2277 */ 2278 tap_transition_tapping_in_drag(sc, &sc->sc_tap_timer, fingers); 2279 break; 2280 2281 default: 2282 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2283 __func__, sc->sc_tap_state); 2284 tap_transition_initial(sc); 2285 break; 2286 } 2287 TAP_DEBUG_POST(sc); 2288 mutex_exit(&sc->sc_tap_mutex); 2289 } 2290 2291 static bool 2293 tap_released(struct uatp_softc *sc) 2294 { 2295 struct timeval now, diff, limit; 2296 void (*non_tapped_transition)(struct uatp_softc *); 2297 bool ok, temporary_release; 2298 2299 mutex_enter(&sc->sc_tap_mutex); 2300 TAP_DEBUG_PRE(sc); 2301 switch (sc->sc_tap_state) { 2302 case TAP_STATE_INITIAL: 2303 case TAP_STATE_TAPPED: 2304 case TAP_STATE_DRAGGING_UP: 2305 /* Spurious interrupt: fingers are already off. */ 2306 ok = false; 2307 break; 2308 2309 case TAP_STATE_TAPPING: 2310 temporary_release = false; 2311 non_tapped_transition = &tap_transition_initial; 2312 goto maybe_tap; 2313 2314 case TAP_STATE_DOUBLE_TAPPING: 2315 temporary_release = true; 2316 non_tapped_transition = &tap_transition_dragging_up; 2317 goto maybe_tap; 2318 2319 case TAP_STATE_TAPPING_IN_DRAG: 2320 temporary_release = false; 2321 non_tapped_transition = &tap_transition_dragging_up; 2322 goto maybe_tap; 2323 2324 maybe_tap: 2325 getmicrouptime(&now); 2326 timersub(&now, &sc->sc_tap_timer, &diff); 2327 uatp_tap_limit(sc, &limit); 2328 if (timercmp(&diff, &limit, <=) && 2329 (sc->sc_track_distance <= 2330 sc->sc_knobs.tap_track_distance_limit)) { 2331 if (temporary_release) { 2332 /* 2333 * XXX Kludge: Temporarily transition 2334 * to a tap state that uatp_input will 2335 * interpret as `no buttons tapped', 2336 * saving the tapping fingers. There 2337 * should instead be a separate routine 2338 * uatp_input_untapped. 2339 */ 2340 unsigned int fingers = sc->sc_tapping_fingers; 2341 tap_transition_initial(sc); 2342 uatp_input(sc, 0, 0, 0, 0, 0); 2343 sc->sc_tapping_fingers = fingers; 2344 } 2345 tap_transition_tapped(sc, &now); 2346 } else { 2347 (*non_tapped_transition)(sc); 2348 } 2349 ok = true; 2350 break; 2351 2352 case TAP_STATE_DRAGGING_DOWN: 2353 tap_transition_dragging_up(sc); 2354 ok = true; 2355 break; 2356 2357 default: 2358 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2359 __func__, sc->sc_tap_state); 2360 tap_transition_initial(sc); 2361 ok = false; 2362 break; 2363 } 2364 TAP_DEBUG_POST(sc); 2365 mutex_exit(&sc->sc_tap_mutex); 2366 return ok; 2367 } 2368 2369 /* Untapping: Releasing the button after a tap */ 2371 2372 static void 2373 schedule_untap(struct uatp_softc *sc) 2374 { 2375 unsigned int ms = sc->sc_knobs.double_tap_limit_msec; 2376 if (ms <= 1000) 2377 callout_schedule(&sc->sc_untap_callout, mstohz(ms)); 2378 else /* XXX Reject bogus values in sysctl. */ 2379 aprint_error_dev(uatp_dev(sc), 2380 "double-tap delay too long: %ums\n", ms); 2381 } 2382 2383 static void 2384 untap_callout(void *arg) 2385 { 2386 struct uatp_softc *sc = arg; 2387 2388 mutex_enter(&sc->sc_tap_mutex); 2389 TAP_DEBUG_PRE(sc); 2390 switch (sc->sc_tap_state) { 2391 case TAP_STATE_TAPPED: 2392 tap_transition_initial(sc); 2393 /* 2394 * XXX Kludge: Call uatp_input after the state transition 2395 * to make sure that it will actually release the button. 2396 */ 2397 uatp_input(sc, 0, 0, 0, 0, 0); 2398 2399 case TAP_STATE_INITIAL: 2400 case TAP_STATE_TAPPING: 2401 case TAP_STATE_DOUBLE_TAPPING: 2402 case TAP_STATE_DRAGGING_UP: 2403 case TAP_STATE_DRAGGING_DOWN: 2404 case TAP_STATE_TAPPING_IN_DRAG: 2405 /* 2406 * Somebody else got in and changed the state before we 2407 * untapped. Let them take over; do nothing here. 2408 */ 2409 break; 2410 2411 default: 2412 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2413 __func__, sc->sc_tap_state); 2414 tap_transition_initial(sc); 2415 /* XXX Just in case...? */ 2416 uatp_input(sc, 0, 0, 0, 0, 0); 2417 break; 2418 } 2419 TAP_DEBUG_POST(sc); 2420 /* XXX Broadcast only if state was TAPPED? */ 2421 cv_broadcast(&sc->sc_tap_cv); 2422 mutex_exit(&sc->sc_tap_mutex); 2423 } 2424 2425 /* 2427 * Emulate different buttons if the user holds down n fingers while 2428 * pressing the physical button. (This is unrelated to tapping.) 2429 */ 2430 2431 static uint32_t 2432 emulated_buttons(struct uatp_softc *sc, unsigned int fingers) 2433 { 2434 CHECK((1 < fingers), return 0); 2435 2436 switch (fingers) { 2437 case 2: 2438 DPRINTF(sc, UATP_DEBUG_EMUL_BUTTON, 2439 ("2-finger emulated button: %"PRIx32"\n", 2440 sc->sc_knobs.two_finger_buttons)); 2441 return sc->sc_knobs.two_finger_buttons; 2442 2443 case 3: 2444 default: 2445 DPRINTF(sc, UATP_DEBUG_EMUL_BUTTON, 2446 ("3-finger emulated button: %"PRIx32"\n", 2447 sc->sc_knobs.three_finger_buttons)); 2448 return sc->sc_knobs.three_finger_buttons; 2449 } 2450 } 2451 2452 /* 2454 * Update the position known to the driver based on the position and 2455 * number of fingers. dx, dy, dz, and dw are expected to hold zero; 2456 * update_position may store nonzero changes in position in them. 2457 */ 2458 2459 static void 2460 update_position(struct uatp_softc *sc, unsigned int fingers, 2461 unsigned int x_raw, unsigned int y_raw, 2462 int *dx, int *dy, int *dz, int *dw) 2463 { 2464 CHECK((0 < fingers), return); 2465 2466 if ((fingers == 1) || (sc->sc_knobs.multifinger_track == 1)) 2467 move_mouse(sc, x_raw, y_raw, dx, dy); 2468 else if (sc->sc_knobs.multifinger_track == 2) 2469 scroll_wheel(sc, x_raw, y_raw, dz, dw); 2470 } 2471 2472 /* 2473 * XXX Scrolling needs to use a totally different motion model. 2474 */ 2475 2476 static void 2477 move_mouse(struct uatp_softc *sc, unsigned int x_raw, unsigned int y_raw, 2478 int *dx, int *dy) 2479 { 2480 move(sc, "mouse", x_raw, y_raw, &sc->sc_x_raw, &sc->sc_y_raw, 2481 &sc->sc_x_smoothed, &sc->sc_y_smoothed, 2482 &sc->sc_x_remainder, &sc->sc_y_remainder, 2483 dx, dy); 2484 } 2485 2486 static void 2487 scroll_wheel(struct uatp_softc *sc, unsigned int x_raw, unsigned int y_raw, 2488 int *dz, int *dw) 2489 { 2490 move(sc, "scroll", x_raw, y_raw, &sc->sc_z_raw, &sc->sc_w_raw, 2491 &sc->sc_z_smoothed, &sc->sc_w_smoothed, 2492 &sc->sc_z_remainder, &sc->sc_w_remainder, 2493 dz, dw); 2494 } 2495 2496 static void 2498 move(struct uatp_softc *sc, const char *ctx, unsigned int a, unsigned int b, 2499 int *a_raw, int *b_raw, 2500 int *a_smoothed, int *b_smoothed, 2501 unsigned int *a_remainder, unsigned int *b_remainder, 2502 int *da, int *db) 2503 { 2504 #define CHECK_(condition) CHECK(condition, return) 2505 2506 int old_a_raw = *a_raw, old_a_smoothed = *a_smoothed; 2507 int old_b_raw = *b_raw, old_b_smoothed = *b_smoothed; 2508 unsigned int a_dist, b_dist, dist_squared; 2509 bool a_fast, b_fast; 2510 2511 /* 2512 * Make sure the quadratics in motion_below_threshold and 2513 * tracking distance don't overflow int arithmetic. 2514 */ 2515 __CTASSERT(0x12000000 == (2 * UATP_MAX_POSITION * UATP_MAX_POSITION)); 2516 2517 CHECK_(a <= UATP_MAX_POSITION); 2518 CHECK_(b <= UATP_MAX_POSITION); 2519 *a_raw = a; 2520 *b_raw = b; 2521 if ((old_a_raw < 0) || (old_b_raw < 0)) { 2522 DPRINTF(sc, UATP_DEBUG_MOVE, 2523 ("initialize %s position (%d, %d) -> (%d, %d)\n", ctx, 2524 old_a_raw, old_b_raw, a, b)); 2525 return; 2526 } 2527 2528 if ((old_a_smoothed < 0) || (old_b_smoothed < 0)) { 2529 /* XXX Does this make sense? */ 2530 old_a_smoothed = old_a_raw; 2531 old_b_smoothed = old_b_raw; 2532 } 2533 2534 CHECK_(0 <= old_a_raw); 2535 CHECK_(0 <= old_b_raw); 2536 CHECK_(old_a_raw <= UATP_MAX_POSITION); 2537 CHECK_(old_b_raw <= UATP_MAX_POSITION); 2538 CHECK_(0 <= old_a_smoothed); 2539 CHECK_(0 <= old_b_smoothed); 2540 CHECK_(old_a_smoothed <= UATP_MAX_POSITION); 2541 CHECK_(old_b_smoothed <= UATP_MAX_POSITION); 2542 CHECK_(0 <= *a_raw); 2543 CHECK_(0 <= *b_raw); 2544 CHECK_(*a_raw <= UATP_MAX_POSITION); 2545 CHECK_(*b_raw <= UATP_MAX_POSITION); 2546 *a_smoothed = smooth(sc, old_a_raw, old_a_smoothed, *a_raw); 2547 *b_smoothed = smooth(sc, old_b_raw, old_b_smoothed, *b_raw); 2548 CHECK_(0 <= *a_smoothed); 2549 CHECK_(0 <= *b_smoothed); 2550 CHECK_(*a_smoothed <= UATP_MAX_POSITION); 2551 CHECK_(*b_smoothed <= UATP_MAX_POSITION); 2552 2553 if (sc->sc_motion_timer < sc->sc_knobs.motion_delay) { 2555 DPRINTF(sc, UATP_DEBUG_MOVE, ("delay motion %u\n", 2556 sc->sc_motion_timer)); 2557 sc->sc_motion_timer += 1; 2558 return; 2559 } 2560 2561 /* XXX Use raw distances or smoothed distances? Acceleration? */ 2562 if (*a_smoothed < old_a_smoothed) 2563 a_dist = old_a_smoothed - *a_smoothed; 2564 else 2565 a_dist = *a_smoothed - old_a_smoothed; 2566 2567 if (*b_smoothed < old_b_smoothed) 2568 b_dist = old_b_smoothed - *b_smoothed; 2569 else 2570 b_dist = *b_smoothed - old_b_smoothed; 2571 2572 dist_squared = (a_dist * a_dist) + (b_dist * b_dist); 2573 if (dist_squared < ((2 * UATP_MAX_POSITION * UATP_MAX_POSITION) 2574 - sc->sc_track_distance)) 2575 sc->sc_track_distance += dist_squared; 2576 else 2577 sc->sc_track_distance = (2 * UATP_MAX_POSITION * 2578 UATP_MAX_POSITION); 2579 DPRINTF(sc, UATP_DEBUG_TRACK_DIST, ("finger has tracked %u units^2\n", 2580 sc->sc_track_distance)); 2581 2582 /* 2583 * The checks above guarantee that the differences here are at 2584 * most UATP_MAX_POSITION in magnitude, since both minuend and 2585 * subtrahend are nonnegative and at most UATP_MAX_POSITION. 2586 */ 2587 if (motion_below_threshold(sc, sc->sc_knobs.motion_threshold, 2588 (int)(*a_smoothed - old_a_smoothed), 2589 (int)(*b_smoothed - old_b_smoothed))) { 2590 DPRINTF(sc, UATP_DEBUG_MOVE, 2591 ("%s motion too small: (%d, %d) -> (%d, %d)\n", ctx, 2592 old_a_smoothed, old_b_smoothed, 2593 *a_smoothed, *b_smoothed)); 2594 return; 2595 } 2596 if (sc->sc_knobs.fast_per_direction == 0) { 2597 a_fast = b_fast = !motion_below_threshold(sc, 2598 sc->sc_knobs.fast_motion_threshold, 2599 (int)(*a_smoothed - old_a_smoothed), 2600 (int)(*b_smoothed - old_b_smoothed)); 2601 } else { 2602 a_fast = !motion_below_threshold(sc, 2603 sc->sc_knobs.fast_motion_threshold, 2604 (int)(*a_smoothed - old_a_smoothed), 2605 0); 2606 b_fast = !motion_below_threshold(sc, 2607 sc->sc_knobs.fast_motion_threshold, 2608 0, 2609 (int)(*b_smoothed - old_b_smoothed)); 2610 } 2611 *da = accelerate(sc, old_a_raw, *a_raw, old_a_smoothed, *a_smoothed, 2612 a_fast, a_remainder); 2613 *db = accelerate(sc, old_b_raw, *b_raw, old_b_smoothed, *b_smoothed, 2614 b_fast, b_remainder); 2615 DPRINTF(sc, UATP_DEBUG_MOVE, 2616 ("update %s position (%d, %d) -> (%d, %d), move by (%d, %d)\n", 2617 ctx, old_a_smoothed, old_b_smoothed, *a_smoothed, *b_smoothed, 2618 *da, *db)); 2619 2620 #undef CHECK_ 2621 } 2622 2623 static int 2625 smooth(struct uatp_softc *sc, unsigned int old_raw, unsigned int old_smoothed, 2626 unsigned int raw) 2627 { 2628 #define CHECK_(condition) CHECK(condition, return old_raw) 2629 2630 /* 2631 * Arithmetic bounds: 2632 * . the weights are at most UATP_MAX_WEIGHT; 2633 * . the positions are at most UATP_MAX_POSITION; and so 2634 * . the numerator of the average is at most 2635 * 3 * UATP_MAX_WEIGHT * UATP_MAX_POSITION, 2636 * which is #x477000, fitting comfortably in an int. 2637 */ 2638 __CTASSERT(0x477000 == (3 * UATP_MAX_WEIGHT * UATP_MAX_POSITION)); 2639 unsigned int old_raw_weight = uatp_old_raw_weight(sc); 2640 unsigned int old_smoothed_weight = uatp_old_smoothed_weight(sc); 2641 unsigned int new_raw_weight = uatp_new_raw_weight(sc); 2642 CHECK_(old_raw_weight <= UATP_MAX_WEIGHT); 2643 CHECK_(old_smoothed_weight <= UATP_MAX_WEIGHT); 2644 CHECK_(new_raw_weight <= UATP_MAX_WEIGHT); 2645 CHECK_(old_raw <= UATP_MAX_POSITION); 2646 CHECK_(old_smoothed <= UATP_MAX_POSITION); 2647 CHECK_(raw <= UATP_MAX_POSITION); 2648 return (((old_raw_weight * old_raw) + 2649 (old_smoothed_weight * old_smoothed) + 2650 (new_raw_weight * raw)) 2651 / (old_raw_weight + old_smoothed_weight + new_raw_weight)); 2652 2653 #undef CHECK_ 2654 } 2655 2656 static bool 2657 motion_below_threshold(struct uatp_softc *sc, unsigned int threshold, 2658 int x, int y) 2659 { 2660 unsigned int x_squared, y_squared; 2661 2662 /* Caller guarantees the multiplication will not overflow. */ 2663 KASSERT(-UATP_MAX_POSITION <= x); 2664 KASSERT(-UATP_MAX_POSITION <= y); 2665 KASSERT(x <= UATP_MAX_POSITION); 2666 KASSERT(y <= UATP_MAX_POSITION); 2667 __CTASSERT(0x12000000 == (2 * UATP_MAX_POSITION * UATP_MAX_POSITION)); 2668 2669 x_squared = (x * x); 2670 y_squared = (y * y); 2671 2672 return ((x_squared + y_squared) < threshold); 2673 } 2674 2675 static int 2676 accelerate(struct uatp_softc *sc, unsigned int old_raw, unsigned int raw, 2677 unsigned int old_smoothed, unsigned int smoothed, bool fast, 2678 int *remainder) 2679 { 2680 #define CHECK_(condition) CHECK(condition, return 0) 2681 2682 /* Guarantee that the scaling won't overflow. */ 2683 __CTASSERT(0x30000 == 2684 (UATP_MAX_POSITION * UATP_MAX_MOTION_MULTIPLIER)); 2685 2686 CHECK_(old_raw <= UATP_MAX_POSITION); 2687 CHECK_(raw <= UATP_MAX_POSITION); 2688 CHECK_(old_smoothed <= UATP_MAX_POSITION); 2689 CHECK_(smoothed <= UATP_MAX_POSITION); 2690 2691 return (fast ? uatp_scale_fast_motion : uatp_scale_motion) 2692 (sc, (((int) smoothed) - ((int) old_smoothed)), remainder); 2693 2694 #undef CHECK_ 2695 } 2696 2697 MODULE(MODULE_CLASS_DRIVER, uatp, NULL); 2699 2700 #ifdef _MODULE 2701 #include "ioconf.c" 2702 #endif 2703 2704 static int 2705 uatp_modcmd(modcmd_t cmd, void *aux) 2706 { 2707 int error = 0; 2708 2709 switch (cmd) { 2710 case MODULE_CMD_INIT: 2711 #ifdef _MODULE 2712 error = config_init_component(cfdriver_ioconf_uatp, 2713 cfattach_ioconf_uatp, cfdata_ioconf_uatp); 2714 #endif 2715 return error; 2716 case MODULE_CMD_FINI: 2717 #ifdef _MODULE 2718 error = config_fini_component(cfdriver_ioconf_uatp, 2719 cfattach_ioconf_uatp, cfdata_ioconf_uatp); 2720 #endif 2721 return error; 2722 default: 2723 return ENOTTY; 2724 } 2725 } 2726
Indexes created Thu Sep 25 16:09:42 GMT 2025