uatp.c revision 1.27
1 /* $NetBSD: uatp.c,v 1.27 2021/08/07 16:19:17 thorpej 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 /* 44 * Protocol 45 * 46 * The device has a set of horizontal sensors, each being a column at a 47 * particular position on the x axis that tells you whether there is 48 * pressure anywhere on that column, and vertical sensors, each being a 49 * row at a particular position on the y axis that tells you whether 50 * there is pressure anywhere on that row. 51 * 52 * Whenever the device senses anything, it emits a readout of all of 53 * the sensors, in some model-dependent order. (For the order, see 54 * read_sample_1 and read_sample_2.) Each sensor datum is an unsigned 55 * eight-bit quantity representing some measure of pressure. (Of 56 * course, it really measures capacitance, not pressure, but we'll call 57 * it `pressure' here.) 58 */ 59 60 /* 61 * Interpretation 62 * 63 * To interpret the finger's position on the trackpad, the driver 64 * computes a weighted average over all possible positions, weighted by 65 * the pressure at that position. The weighted average is computed in 66 * the dimensions of the screen, rather than the trackpad, in order to 67 * admit a finer resolution of positions than the trackpad grid. 68 * 69 * To update the finger's position smoothly on the trackpad, the driver 70 * computes a weighted average of the old raw position, the old 71 * smoothed position, and the new smoothed position. The weights are 72 * given by the old_raw_weight, old_smoothed_weight, and new_raw_weight 73 * sysctl knobs. 74 * 75 * Finally, to move the cursor, the driver takes the difference between 76 * the old and new positions and accelerates it according to some 77 * heuristic knobs that need to be reworked. 78 * 79 * Finally, there are some bells & whistles to detect tapping and to 80 * emulate a three-button mouse by leaving two or three fingers on the 81 * trackpad while pressing the button. 82 */ 83 84 /* 85 * Future work 86 * 87 * With the raw sensor data available, we could implement fancier bells 88 * & whistles too, such as pinch-to-zoom. However, wsmouse supports 89 * only four-dimensional mice with buttons, and we already use two 90 * dimensions for mousing and two dimensions for scrolling, so there's 91 * no straightforward way to report zooming and other gestures to the 92 * operating system. Probably a better way to do this would be just to 93 * attach uhid(4) instead of uatp(4) and to read the raw sensors data 94 * yourself -- but that requires hairy mode switching for recent models 95 * (see geyser34_enable_raw_mode). 96 * 97 * XXX Rework the acceleration knobs. 98 * XXX Implement edge scrolling. 99 * XXX Fix sysctl setup; preserve knobs across suspend/resume. 100 * (uatp0 detaches and reattaches across suspend/resume, so as 101 * written, the sysctl tree is torn down and rebuilt, losing any 102 * state the user may have set.) 103 * XXX Refactor motion state so I can understand it again. 104 * Should make a struct uatp_motion for all that state. 105 * XXX Add hooks for ignoring trackpad input while typing. 106 */ 107 108 /* 109 * Classifying devices 110 * 111 * I have only one MacBook to test this driver, but the driver should 112 * be applicable to almost every Apple laptop made since the beginning 113 * of 2005, so the driver reports lots of debugging output to help to 114 * classify devices. Boot with `boot -v' (verbose) and check the 115 * output of `dmesg | grep uatp' to answer the following questions: 116 * 117 * - What devices (vendor, product, class, subclass, proto, USB HID 118 * report dump) fail to attach when you think they should work? 119 * (vendor not apple, class not hid, proto not mouse) 120 * 121 * - What devices have an unknown product id? 122 * `unknown vendor/product id' 123 * 124 * - What devices have the wrong screen-to-trackpad ratios? 125 * `... x sensors, scaled by ... for ... points on screen' 126 * `... y sensors, scaled by ... for ... points on screen' 127 * You can tweak hw.uatp0.x_ratio and hw.uatp0.y_ratio to adjust 128 * this, up to a maximum of 384 for each value. 129 * 130 * - What devices have the wrong input size? 131 * `expected input size ... but got ... for Apple trackpad' 132 * 133 * - What devices give wrong-sized packets? 134 * `discarding ...-byte input' 135 * 136 * - What devices split packets in chunks? 137 * `partial packet: ... bytes' 138 * 139 * - What devices develop large sensor readouts? 140 * `large sensor readout: ...' 141 * 142 * - What devices have the wrong number of sensors? Are there parts of 143 * your trackpad that the system doesn't seem to notice? You can 144 * tweak hw.uatp0.x_sensors and hw.uatp0.y_sensors, up to a maximum 145 * of 32 for each value. 146 */ 147 148 #include <sys/cdefs.h> 149 __KERNEL_RCSID(0, "$NetBSD: uatp.c,v 1.27 2021/08/07 16:19:17 thorpej Exp $"); 150 151 #ifdef _KERNEL_OPT 152 #include "opt_usb.h" 153 #endif 154 155 #include <sys/types.h> 156 #include <sys/param.h> 157 #include <sys/atomic.h> 158 #include <sys/device.h> 159 #include <sys/errno.h> 160 #include <sys/ioctl.h> 161 #include <sys/kernel.h> 162 #include <sys/module.h> 163 #include <sys/sysctl.h> 164 #include <sys/systm.h> 165 #include <sys/time.h> 166 167 /* Order is important here...sigh... */ 168 #include <dev/usb/usb.h> 169 #include <dev/usb/usbdi.h> 170 #include <dev/usb/usbdi_util.h> 171 #include <dev/usb/usbdevs.h> 172 #include <dev/usb/uhidev.h> 173 #include <dev/usb/usbhid.h> 174 #include <dev/hid/hid.h> 175 176 #include <dev/wscons/wsconsio.h> 177 #include <dev/wscons/wsmousevar.h> 178 179 #define CHECK(condition, fail) do { \ 180 if (! (condition)) { \ 181 aprint_error_dev(uatp_dev(sc), "%s: check failed: %s\n",\ 182 __func__, #condition); \ 183 fail; \ 184 } \ 185 } while (0) 186 187 #define UATP_DEBUG_ATTACH __BIT(0) 188 #define UATP_DEBUG_MISC __BIT(1) 189 #define UATP_DEBUG_WSMOUSE __BIT(2) 190 #define UATP_DEBUG_IOCTL __BIT(3) 191 #define UATP_DEBUG_RESET __BIT(4) 192 #define UATP_DEBUG_INTR __BIT(5) 193 #define UATP_DEBUG_PARSE __BIT(6) 194 #define UATP_DEBUG_TAP __BIT(7) 195 #define UATP_DEBUG_EMUL_BUTTON __BIT(8) 196 #define UATP_DEBUG_ACCUMULATE __BIT(9) 197 #define UATP_DEBUG_STATUS __BIT(10) 198 #define UATP_DEBUG_SPURINTR __BIT(11) 199 #define UATP_DEBUG_MOVE __BIT(12) 200 #define UATP_DEBUG_ACCEL __BIT(13) 201 #define UATP_DEBUG_TRACK_DIST __BIT(14) 202 #define UATP_DEBUG_PALM __BIT(15) 203 204 /* 205 * Unconditionally enable the debug output so you don't have to 206 * recompile the kernel to diagnose it. This is not a high-throughput 207 * NIC driver or anything that will be hurt by a few conditionals. 208 */ 209 #define UATP_DEBUG 1 210 211 #if UATP_DEBUG 212 # define DPRINTF(sc, flags, format) do { \ 213 if ((flags) & (sc)->sc_debug_flags) { \ 214 printf("%s: %s: ", device_xname(uatp_dev(sc)), __func__); \ 215 printf format; \ 216 } \ 217 } while (0) 218 #else 219 # define DPRINTF(sc, flags, format) do {} while (0) 220 #endif 221 222 /* Maximum number of bytes in an incoming packet of sensor data. */ 223 #define UATP_MAX_INPUT_SIZE 81 224 225 /* Maximum number of sensors in each dimension. */ 226 #define UATP_MAX_X_SENSORS 32 227 #define UATP_MAX_Y_SENSORS 32 228 #define UATP_MAX_SENSORS 32 229 #define UATP_SENSORS (UATP_MAX_X_SENSORS + UATP_MAX_Y_SENSORS) 230 231 /* Maximum accumulated sensor value. */ 232 #define UATP_MAX_ACC 0xff 233 234 /* Maximum screen dimension to sensor dimension ratios. */ 235 #define UATP_MAX_X_RATIO 0x180 236 #define UATP_MAX_Y_RATIO 0x180 237 #define UATP_MAX_RATIO 0x180 238 239 /* Maximum weight for positions in motion calculation. */ 240 #define UATP_MAX_WEIGHT 0x7f 241 242 /* Maximum possible trackpad position in a single dimension. */ 243 #define UATP_MAX_POSITION (UATP_MAX_SENSORS * UATP_MAX_RATIO) 244 245 /* Bounds on acceleration. */ 246 #define UATP_MAX_MOTION_MULTIPLIER 16 247 248 /* Status bits transmitted in the last byte of an input packet. */ 249 #define UATP_STATUS_BUTTON __BIT(0) /* Button pressed */ 250 #define UATP_STATUS_BASE __BIT(2) /* Base sensor data */ 251 #define UATP_STATUS_POST_RESET __BIT(4) /* Post-reset */ 252 253 /* Forward declarations */ 254 255 struct uatp_softc; /* Device driver state. */ 256 struct uatp_descriptor; /* Descriptor for a particular model. */ 257 struct uatp_parameters; /* Parameters common to a set of models. */ 258 struct uatp_knobs; /* User-settable configuration knobs. */ 259 enum uatp_tap_state { 260 TAP_STATE_INITIAL, 261 TAP_STATE_TAPPING, 262 TAP_STATE_TAPPED, 263 TAP_STATE_DOUBLE_TAPPING, 264 TAP_STATE_DRAGGING_DOWN, 265 TAP_STATE_DRAGGING_UP, 266 TAP_STATE_TAPPING_IN_DRAG, 267 }; 268 269 static const struct uatp_descriptor *find_uatp_descriptor 270 (const struct uhidev_attach_arg *); 271 static device_t uatp_dev(const struct uatp_softc *); 272 static uint8_t *uatp_x_sample(struct uatp_softc *); 273 static uint8_t *uatp_y_sample(struct uatp_softc *); 274 static int *uatp_x_acc(struct uatp_softc *); 275 static int *uatp_y_acc(struct uatp_softc *); 276 static void uatp_clear_position(struct uatp_softc *); 277 static unsigned int uatp_x_sensors(const struct uatp_softc *); 278 static unsigned int uatp_y_sensors(const struct uatp_softc *); 279 static unsigned int uatp_x_ratio(const struct uatp_softc *); 280 static unsigned int uatp_y_ratio(const struct uatp_softc *); 281 static unsigned int uatp_old_raw_weight(const struct uatp_softc *); 282 static unsigned int uatp_old_smoothed_weight(const struct uatp_softc *); 283 static unsigned int uatp_new_raw_weight(const struct uatp_softc *); 284 static int scale_motion(const struct uatp_softc *, int, int *, 285 const unsigned int *, const unsigned int *); 286 static int uatp_scale_motion(const struct uatp_softc *, int, int *); 287 static int uatp_scale_fast_motion(const struct uatp_softc *, int, int *); 288 static int uatp_match(device_t, cfdata_t, void *); 289 static void uatp_attach(device_t, device_t, void *); 290 static void uatp_setup_sysctl(struct uatp_softc *); 291 static bool uatp_setup_sysctl_knob(struct uatp_softc *, int *, const char *, 292 const char *); 293 static void uatp_childdet(device_t, device_t); 294 static int uatp_detach(device_t, int); 295 static int uatp_activate(device_t, enum devact); 296 static int uatp_enable(void *); 297 static void uatp_disable(void *); 298 static int uatp_ioctl(void *, unsigned long, void *, int, struct lwp *); 299 static void geyser34_enable_raw_mode(struct uatp_softc *); 300 static void geyser34_initialize(struct uatp_softc *); 301 static int geyser34_finalize(struct uatp_softc *); 302 static void geyser34_deferred_reset(struct uatp_softc *); 303 static void geyser34_reset_task(void *); 304 static void uatp_intr(struct uhidev *, void *, unsigned int); 305 static bool base_sample_softc_flag(const struct uatp_softc *, const uint8_t *); 306 static bool base_sample_input_flag(const struct uatp_softc *, const uint8_t *); 307 static void read_sample_1(uint8_t *, uint8_t *, const uint8_t *); 308 static void read_sample_2(uint8_t *, uint8_t *, const uint8_t *); 309 static void accumulate_sample_1(struct uatp_softc *); 310 static void accumulate_sample_2(struct uatp_softc *); 311 static void uatp_input(struct uatp_softc *, uint32_t, int, int, int, int); 312 static uint32_t uatp_tapped_buttons(struct uatp_softc *); 313 static bool interpret_input(struct uatp_softc *, int *, int *, int *, int *, 314 uint32_t *); 315 static unsigned int interpret_dimension(struct uatp_softc *, const int *, 316 unsigned int, unsigned int, unsigned int *, unsigned int *); 317 static void tap_initialize(struct uatp_softc *); 318 static void tap_finalize(struct uatp_softc *); 319 static void tap_enable(struct uatp_softc *); 320 static void tap_disable(struct uatp_softc *); 321 static void tap_transition(struct uatp_softc *, enum uatp_tap_state, 322 const struct timeval *, unsigned int, unsigned int); 323 static void tap_transition_initial(struct uatp_softc *); 324 static void tap_transition_tapping(struct uatp_softc *, const struct timeval *, 325 unsigned int); 326 static void tap_transition_double_tapping(struct uatp_softc *, 327 const struct timeval *, unsigned int); 328 static void tap_transition_dragging_down(struct uatp_softc *); 329 static void tap_transition_tapping_in_drag(struct uatp_softc *, 330 const struct timeval *, unsigned int); 331 static void tap_transition_tapped(struct uatp_softc *, const struct timeval *); 332 static void tap_transition_dragging_up(struct uatp_softc *); 333 static void tap_reset(struct uatp_softc *); 334 static void tap_reset_wait(struct uatp_softc *); 335 static void tap_touched(struct uatp_softc *, unsigned int); 336 static bool tap_released(struct uatp_softc *); 337 static void schedule_untap(struct uatp_softc *); 338 static void untap_callout(void *); 339 static uint32_t emulated_buttons(struct uatp_softc *, unsigned int); 340 static void update_position(struct uatp_softc *, unsigned int, 341 unsigned int, unsigned int, int *, int *, int *, int *); 342 static void move_mouse(struct uatp_softc *, unsigned int, unsigned int, 343 int *, int *); 344 static void scroll_wheel(struct uatp_softc *, unsigned int, unsigned int, 345 int *, int *); 346 static void move(struct uatp_softc *, const char *, unsigned int, unsigned int, 347 int *, int *, int *, int *, unsigned int *, unsigned int *, int *, int *); 348 static int smooth(struct uatp_softc *, unsigned int, unsigned int, 349 unsigned int); 350 static bool motion_below_threshold(struct uatp_softc *, unsigned int, 351 int, int); 352 static int accelerate(struct uatp_softc *, unsigned int, unsigned int, 353 unsigned int, unsigned int, bool, int *); 354 355 struct uatp_knobs { 356 /* 357 * Button emulation. What do we do when two or three fingers 358 * are on the trackpad when the user presses the button? 359 */ 360 unsigned int two_finger_buttons; 361 unsigned int three_finger_buttons; 362 363 #if 0 364 /* 365 * Edge scrolling. 366 * 367 * XXX Implement this. What units should these be in? 368 */ 369 unsigned int top_edge; 370 unsigned int bottom_edge; 371 unsigned int left_edge; 372 unsigned int right_edge; 373 #endif 374 375 /* 376 * Multifinger tracking. What do we do with multiple fingers? 377 * 0. Ignore them. 378 * 1. Try to interpret them as ordinary mousing. 379 * 2. Act like a two-dimensional scroll wheel. 380 */ 381 unsigned int multifinger_track; 382 383 /* 384 * Sensor parameters. 385 */ 386 unsigned int x_sensors; 387 unsigned int x_ratio; 388 unsigned int y_sensors; 389 unsigned int y_ratio; 390 unsigned int sensor_threshold; 391 unsigned int sensor_normalizer; 392 unsigned int palm_width; 393 unsigned int old_raw_weight; 394 unsigned int old_smoothed_weight; 395 unsigned int new_raw_weight; 396 397 /* 398 * Motion parameters. 399 * 400 * XXX There should be a more principled model of acceleration. 401 */ 402 unsigned int motion_remainder; 403 unsigned int motion_threshold; 404 unsigned int motion_multiplier; 405 unsigned int motion_divisor; 406 unsigned int fast_motion_threshold; 407 unsigned int fast_motion_multiplier; 408 unsigned int fast_motion_divisor; 409 unsigned int fast_per_direction; 410 unsigned int motion_delay; 411 412 /* 413 * Tapping. 414 */ 415 unsigned int tap_limit_msec; 416 unsigned int double_tap_limit_msec; 417 unsigned int one_finger_tap_buttons; 418 unsigned int two_finger_tap_buttons; 419 unsigned int three_finger_tap_buttons; 420 unsigned int tap_track_distance_limit; 421 }; 422 423 static const struct uatp_knobs default_knobs = { 424 /* 425 * Button emulation. Fingers on the trackpad don't change it 426 * by default -- it's still the left button. 427 * 428 * XXX The left button should have a name. 429 */ 430 .two_finger_buttons = 1, 431 .three_finger_buttons = 1, 432 433 #if 0 434 /* 435 * Edge scrolling. Off by default. 436 */ 437 .top_edge = 0, 438 .bottom_edge = 0, 439 .left_edge = 0, 440 .right_edge = 0, 441 #endif 442 443 /* 444 * Multifinger tracking. Ignore by default. 445 */ 446 .multifinger_track = 0, 447 448 /* 449 * Sensor parameters. 450 */ 451 .x_sensors = 0, /* default for model */ 452 .x_ratio = 0, /* default for model */ 453 .y_sensors = 0, /* default for model */ 454 .y_ratio = 0, /* default for model */ 455 .sensor_threshold = 5, 456 .sensor_normalizer = 5, 457 .palm_width = 0, /* palm detection disabled */ 458 .old_raw_weight = 0, 459 .old_smoothed_weight = 5, 460 .new_raw_weight = 1, 461 462 /* 463 * Motion parameters. 464 */ 465 .motion_remainder = 1, 466 .motion_threshold = 0, 467 .motion_multiplier = 1, 468 .motion_divisor = 1, 469 .fast_motion_threshold = 10, 470 .fast_motion_multiplier = 3, 471 .fast_motion_divisor = 2, 472 .fast_per_direction = 0, 473 .motion_delay = 4, 474 475 /* 476 * Tapping. Disabled by default, with a reasonable time set 477 * nevertheless so that you can just set the buttons to enable 478 * it. 479 */ 480 .tap_limit_msec = 100, 481 .double_tap_limit_msec = 200, 482 .one_finger_tap_buttons = 0, 483 .two_finger_tap_buttons = 0, 484 .three_finger_tap_buttons = 0, 485 .tap_track_distance_limit = 200, 486 }; 487 488 struct uatp_softc { 489 struct uhidev sc_hdev; /* USB parent. */ 490 device_t sc_wsmousedev; /* Attached wsmouse device. */ 491 const struct uatp_parameters *sc_parameters; 492 struct uatp_knobs sc_knobs; 493 struct sysctllog *sc_log; /* Log for sysctl knobs. */ 494 const struct sysctlnode *sc_node; /* Our sysctl node. */ 495 unsigned int sc_input_size; /* Input packet size. */ 496 uint8_t sc_input[UATP_MAX_INPUT_SIZE]; /* Buffer for a packet. */ 497 unsigned int sc_input_index; /* Current index into sc_input. */ 498 int sc_acc[UATP_SENSORS]; /* Accumulated sensor state. */ 499 uint8_t sc_base[UATP_SENSORS]; /* Base sample. */ 500 uint8_t sc_sample[UATP_SENSORS];/* Current sample. */ 501 unsigned int sc_motion_timer; /* XXX describe; motion_delay */ 502 int sc_x_raw; /* Raw horiz. mouse position. */ 503 int sc_y_raw; /* Raw vert. mouse position. */ 504 int sc_z_raw; /* Raw horiz. scroll position. */ 505 int sc_w_raw; /* Raw vert. scroll position. */ 506 int sc_x_smoothed; /* Smoothed horiz. mouse position. */ 507 int sc_y_smoothed; /* Smoothed vert. mouse position. */ 508 int sc_z_smoothed; /* Smoothed horiz. scroll position. */ 509 int sc_w_smoothed; /* Smoothed vert. scroll position. */ 510 int sc_x_remainder; /* Remainders from acceleration. */ 511 int sc_y_remainder; 512 int sc_z_remainder; 513 int sc_w_remainder; 514 unsigned int sc_track_distance; /* Distance^2 finger has tracked, 515 * squared to avoid sqrt in kernel. */ 516 uint32_t sc_status; /* Status flags: */ 517 #define UATP_ENABLED __BIT(0) /* . Is the wsmouse enabled? */ 518 #define UATP_DYING __BIT(1) /* . Have we been deactivated? */ 519 #define UATP_VALID __BIT(2) /* . Do we have valid sensor data? */ 520 struct usb_task sc_reset_task; /* Task for resetting device. */ 521 522 callout_t sc_untap_callout; /* Releases button after tap. */ 523 kmutex_t sc_tap_mutex; /* Protects the following fields. */ 524 enum uatp_tap_state sc_tap_state; /* Current tap state. */ 525 unsigned int sc_tapping_fingers; /* No. fingers tapping. */ 526 unsigned int sc_tapped_fingers; /* No. fingers of last tap. */ 527 struct timeval sc_tap_timer; /* Timer for tap state transitions. */ 528 uint32_t sc_buttons; /* Physical buttons pressed. */ 529 uint32_t sc_all_buttons; /* Buttons pressed or tapped. */ 530 531 #if UATP_DEBUG 532 uint32_t sc_debug_flags; /* Debugging output enabled. */ 533 #endif 534 }; 535 536 struct uatp_descriptor { 537 uint16_t vendor; 538 uint16_t product; 539 const char *description; 540 const struct uatp_parameters *parameters; 541 }; 542 543 struct uatp_parameters { 544 unsigned int x_ratio; /* Screen width / trackpad width. */ 545 unsigned int x_sensors; /* Number of horizontal sensors. */ 546 unsigned int x_sensors_17; /* XXX Same, on a 17" laptop. */ 547 unsigned int y_ratio; /* Screen height / trackpad height. */ 548 unsigned int y_sensors; /* Number of vertical sensors. */ 549 unsigned int input_size; /* Size in bytes of input packets. */ 550 551 /* Device-specific initialization routine. May be null. */ 552 void (*initialize)(struct uatp_softc *); 553 554 /* Device-specific finalization routine. May be null. May fail. */ 555 int (*finalize)(struct uatp_softc *); 556 557 /* Tests whether this is a base sample. Second argument is 558 * input_size bytes long. */ 559 bool (*base_sample)(const struct uatp_softc *, const uint8_t *); 560 561 /* Reads a sensor sample from an input packet. First argument 562 * is UATP_MAX_X_SENSORS bytes long; second, UATP_MAX_Y_SENSORS 563 * bytes; third, input_size bytes. */ 564 void (*read_sample)(uint8_t *, uint8_t *, const uint8_t *); 565 566 /* Accumulates sensor state in sc->sc_acc. */ 567 void (*accumulate)(struct uatp_softc *); 568 569 /* Called on spurious interrupts to reset. May be null. */ 570 void (*reset)(struct uatp_softc *); 571 }; 572 573 /* 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 */ 632 633 #define APPLE_TRACKPAD(PRODUCT, DESCRIPTION, PARAMETERS) \ 634 { \ 635 .vendor = USB_VENDOR_APPLE, \ 636 .product = (PRODUCT), \ 637 .description = "Apple " DESCRIPTION " trackpad", \ 638 .parameters = (& (PARAMETERS)), \ 639 } 640 641 #define POWERBOOK_TRACKPAD(PRODUCT, PARAMETERS) \ 642 APPLE_TRACKPAD(PRODUCT, "PowerBook/iBook", PARAMETERS) 643 #define MACBOOK_TRACKPAD(PRODUCT, PARAMETERS) \ 644 APPLE_TRACKPAD(PRODUCT, "MacBook/MacBook Pro", PARAMETERS) 645 646 static const struct uatp_descriptor uatp_descriptors[] = 647 { 648 POWERBOOK_TRACKPAD(0x020e, fountain_parameters), 649 POWERBOOK_TRACKPAD(0x020f, fountain_parameters), 650 POWERBOOK_TRACKPAD(0x030a, fountain_parameters), 651 652 POWERBOOK_TRACKPAD(0x030b, geyser_1_parameters), 653 654 POWERBOOK_TRACKPAD(0x0214, geyser_2_parameters), 655 POWERBOOK_TRACKPAD(0x0215, geyser_2_parameters), 656 POWERBOOK_TRACKPAD(0x0216, geyser_2_parameters), 657 658 MACBOOK_TRACKPAD(0x0217, geyser_3_4_parameters), /* 3 */ 659 MACBOOK_TRACKPAD(0x0218, geyser_3_4_parameters), /* 3 */ 660 MACBOOK_TRACKPAD(0x0219, geyser_3_4_parameters), /* 3 */ 661 662 MACBOOK_TRACKPAD(0x021a, geyser_3_4_parameters), /* 4 */ 663 MACBOOK_TRACKPAD(0x021b, geyser_3_4_parameters), /* 4 */ 664 MACBOOK_TRACKPAD(0x021c, geyser_3_4_parameters), /* 4 */ 665 666 MACBOOK_TRACKPAD(0x0229, geyser_3_4_parameters), /* 4 */ 667 MACBOOK_TRACKPAD(0x022a, geyser_3_4_parameters), /* 4 */ 668 MACBOOK_TRACKPAD(0x022b, geyser_3_4_parameters), /* 4 */ 669 }; 670 671 #undef MACBOOK_TRACKPAD 672 #undef POWERBOOK_TRACKPAD 673 #undef APPLE_TRACKPAD 674 675 /* Miscellaneous utilities */ 676 677 static const struct uatp_descriptor * 678 find_uatp_descriptor(const struct uhidev_attach_arg *uha) 679 { 680 unsigned int i; 681 682 for (i = 0; i < __arraycount(uatp_descriptors); i++) 683 if ((uha->uiaa->uiaa_vendor == uatp_descriptors[i].vendor) && 684 (uha->uiaa->uiaa_product == uatp_descriptors[i].product)) 685 return &uatp_descriptors[i]; 686 687 return NULL; 688 } 689 690 static device_t 691 uatp_dev(const struct uatp_softc *sc) 692 { 693 return sc->sc_hdev.sc_dev; 694 } 695 696 static uint8_t * 697 uatp_x_sample(struct uatp_softc *sc) 698 { 699 return &sc->sc_sample[0]; 700 } 701 702 static uint8_t * 703 uatp_y_sample(struct uatp_softc *sc) 704 { 705 return &sc->sc_sample[UATP_MAX_X_SENSORS]; 706 } 707 708 static int * 709 uatp_x_acc(struct uatp_softc *sc) 710 { 711 return &sc->sc_acc[0]; 712 } 713 714 static int * 715 uatp_y_acc(struct uatp_softc *sc) 716 { 717 return &sc->sc_acc[UATP_MAX_X_SENSORS]; 718 } 719 720 static void 721 uatp_clear_position(struct uatp_softc *sc) 722 { 723 memset(sc->sc_acc, 0, sizeof(sc->sc_acc)); 724 sc->sc_motion_timer = 0; 725 sc->sc_x_raw = sc->sc_x_smoothed = -1; 726 sc->sc_y_raw = sc->sc_y_smoothed = -1; 727 sc->sc_z_raw = sc->sc_z_smoothed = -1; 728 sc->sc_w_raw = sc->sc_w_smoothed = -1; 729 sc->sc_x_remainder = 0; 730 sc->sc_y_remainder = 0; 731 sc->sc_z_remainder = 0; 732 sc->sc_w_remainder = 0; 733 sc->sc_track_distance = 0; 734 } 735 736 static unsigned int 737 uatp_x_sensors(const struct uatp_softc *sc) 738 { 739 if ((0 < sc->sc_knobs.x_sensors) && 740 (sc->sc_knobs.x_sensors <= UATP_MAX_X_SENSORS)) 741 return sc->sc_knobs.x_sensors; 742 else 743 return sc->sc_parameters->x_sensors; 744 } 745 746 static unsigned int 747 uatp_y_sensors(const struct uatp_softc *sc) 748 { 749 if ((0 < sc->sc_knobs.y_sensors) && 750 (sc->sc_knobs.y_sensors <= UATP_MAX_Y_SENSORS)) 751 return sc->sc_knobs.y_sensors; 752 else 753 return sc->sc_parameters->y_sensors; 754 } 755 756 static unsigned int 757 uatp_x_ratio(const struct uatp_softc *sc) 758 { 759 /* XXX Reject bogus values in sysctl. */ 760 if ((0 < sc->sc_knobs.x_ratio) && 761 (sc->sc_knobs.x_ratio <= UATP_MAX_X_RATIO)) 762 return sc->sc_knobs.x_ratio; 763 else 764 return sc->sc_parameters->x_ratio; 765 } 766 767 static unsigned int 768 uatp_y_ratio(const struct uatp_softc *sc) 769 { 770 /* XXX Reject bogus values in sysctl. */ 771 if ((0 < sc->sc_knobs.y_ratio) && 772 (sc->sc_knobs.y_ratio <= UATP_MAX_Y_RATIO)) 773 return sc->sc_knobs.y_ratio; 774 else 775 return sc->sc_parameters->y_ratio; 776 } 777 778 static unsigned int 779 uatp_old_raw_weight(const struct uatp_softc *sc) 780 { 781 /* XXX Reject bogus values in sysctl. */ 782 if (sc->sc_knobs.old_raw_weight <= UATP_MAX_WEIGHT) 783 return sc->sc_knobs.old_raw_weight; 784 else 785 return 0; 786 } 787 788 static unsigned int 789 uatp_old_smoothed_weight(const struct uatp_softc *sc) 790 { 791 /* XXX Reject bogus values in sysctl. */ 792 if (sc->sc_knobs.old_smoothed_weight <= UATP_MAX_WEIGHT) 793 return sc->sc_knobs.old_smoothed_weight; 794 else 795 return 0; 796 } 797 798 static unsigned int 799 uatp_new_raw_weight(const struct uatp_softc *sc) 800 { 801 /* XXX Reject bogus values in sysctl. */ 802 if ((0 < sc->sc_knobs.new_raw_weight) && 803 (sc->sc_knobs.new_raw_weight <= UATP_MAX_WEIGHT)) 804 return sc->sc_knobs.new_raw_weight; 805 else 806 return 1; 807 } 808 809 static int 810 scale_motion(const struct uatp_softc *sc, int delta, int *remainder, 811 const unsigned int *multiplier, const unsigned int *divisor) 812 { 813 int product; 814 815 /* XXX Limit the divisor? */ 816 if (((*multiplier) == 0) || 817 ((*multiplier) > UATP_MAX_MOTION_MULTIPLIER) || 818 ((*divisor) == 0)) 819 DPRINTF(sc, UATP_DEBUG_ACCEL, 820 ("bad knobs; %d (+ %d) --> %d, rem 0\n", 821 delta, *remainder, (delta + (*remainder)))); 822 else 823 DPRINTF(sc, UATP_DEBUG_ACCEL, 824 ("scale %d (+ %d) by %u/%u --> %d, rem %d\n", 825 delta, *remainder, 826 (*multiplier), (*divisor), 827 (((delta + (*remainder)) * ((int) (*multiplier))) 828 / ((int) (*divisor))), 829 (((delta + (*remainder)) * ((int) (*multiplier))) 830 % ((int) (*divisor))))); 831 832 if (sc->sc_knobs.motion_remainder) 833 delta += *remainder; 834 *remainder = 0; 835 836 if (((*multiplier) == 0) || 837 ((*multiplier) > UATP_MAX_MOTION_MULTIPLIER) || 838 ((*divisor) == 0)) 839 return delta; 840 841 product = (delta * ((int) (*multiplier))); 842 *remainder = (product % ((int) (*divisor))); 843 return product / ((int) (*divisor)); 844 } 845 846 static int 847 uatp_scale_motion(const struct uatp_softc *sc, int delta, int *remainder) 848 { 849 return scale_motion(sc, delta, remainder, 850 &sc->sc_knobs.motion_multiplier, 851 &sc->sc_knobs.motion_divisor); 852 } 853 854 static int 855 uatp_scale_fast_motion(const struct uatp_softc *sc, int delta, int *remainder) 856 { 857 return scale_motion(sc, delta, remainder, 858 &sc->sc_knobs.fast_motion_multiplier, 859 &sc->sc_knobs.fast_motion_divisor); 860 } 861 862 /* Driver goop */ 863 864 CFATTACH_DECL2_NEW(uatp, sizeof(struct uatp_softc), uatp_match, uatp_attach, 865 uatp_detach, uatp_activate, NULL, uatp_childdet); 866 867 static const struct wsmouse_accessops uatp_accessops = { 868 .enable = uatp_enable, 869 .disable = uatp_disable, 870 .ioctl = uatp_ioctl, 871 }; 872 873 static int 874 uatp_match(device_t parent, cfdata_t match, void *aux) 875 { 876 const struct uhidev_attach_arg *uha = aux; 877 void *report_descriptor; 878 int report_size, input_size; 879 const struct uatp_descriptor *uatp_descriptor; 880 881 aprint_debug("%s: vendor 0x%04x, product 0x%04x\n", __func__, 882 (unsigned int)uha->uiaa->uiaa_vendor, 883 (unsigned int)uha->uiaa->uiaa_product); 884 aprint_debug("%s: class 0x%04x, subclass 0x%04x, proto 0x%04x\n", 885 __func__, 886 (unsigned int)uha->uiaa->uiaa_class, 887 (unsigned int)uha->uiaa->uiaa_subclass, 888 (unsigned int)uha->uiaa->uiaa_proto); 889 890 uhidev_get_report_desc(uha->parent, &report_descriptor, &report_size); 891 input_size = hid_report_size(report_descriptor, report_size, 892 hid_input, uha->reportid); 893 aprint_debug("%s: reportid %d, input size %d\n", __func__, 894 (int)uha->reportid, input_size); 895 896 /* 897 * Keyboards, trackpads, and eject buttons share common vendor 898 * and product ids, but not protocols: only the trackpad 899 * reports a mouse protocol. 900 */ 901 if (uha->uiaa->uiaa_proto != UIPROTO_MOUSE) 902 return UMATCH_NONE; 903 904 /* Check for a known vendor/product id. */ 905 uatp_descriptor = find_uatp_descriptor(uha); 906 if (uatp_descriptor == NULL) { 907 aprint_debug("%s: unknown vendor/product id\n", __func__); 908 return UMATCH_NONE; 909 } 910 911 /* Check for the expected input size. */ 912 if ((input_size < 0) || 913 ((unsigned int)input_size != 914 uatp_descriptor->parameters->input_size)) { 915 aprint_debug("%s: expected input size %u\n", __func__, 916 uatp_descriptor->parameters->input_size); 917 return UMATCH_NONE; 918 } 919 920 return UMATCH_VENDOR_PRODUCT_CONF_IFACE; 921 } 922 923 static void 924 uatp_attach(device_t parent, device_t self, void *aux) 925 { 926 struct uatp_softc *sc = device_private(self); 927 const struct uhidev_attach_arg *uha = aux; 928 const struct uatp_descriptor *uatp_descriptor; 929 void *report_descriptor; 930 int report_size, input_size; 931 struct wsmousedev_attach_args a; 932 933 /* Set up uhidev state. (Why doesn't uhidev do most of this?) */ 934 sc->sc_hdev.sc_dev = self; 935 sc->sc_hdev.sc_intr = uatp_intr; 936 sc->sc_hdev.sc_parent = uha->parent; 937 sc->sc_hdev.sc_report_id = uha->reportid; 938 939 /* Identify ourselves to dmesg. */ 940 uatp_descriptor = find_uatp_descriptor(uha); 941 KASSERT(uatp_descriptor != NULL); 942 aprint_normal(": %s\n", uatp_descriptor->description); 943 aprint_naive(": %s\n", uatp_descriptor->description); 944 aprint_verbose_dev(self, 945 "vendor 0x%04x, product 0x%04x, report id %d\n", 946 (unsigned int)uha->uiaa->uiaa_vendor, 947 (unsigned int)uha->uiaa->uiaa_product, 948 (int)uha->reportid); 949 950 uhidev_get_report_desc(uha->parent, &report_descriptor, &report_size); 951 input_size = hid_report_size(report_descriptor, report_size, hid_input, 952 uha->reportid); 953 KASSERT(0 < input_size); 954 sc->sc_input_size = input_size; 955 956 /* Initialize model-specific parameters. */ 957 sc->sc_parameters = uatp_descriptor->parameters; 958 KASSERT((int)sc->sc_parameters->input_size == input_size); 959 KASSERT(sc->sc_parameters->x_sensors <= UATP_MAX_X_SENSORS); 960 KASSERT(sc->sc_parameters->x_ratio <= UATP_MAX_X_RATIO); 961 KASSERT(sc->sc_parameters->y_sensors <= UATP_MAX_Y_SENSORS); 962 KASSERT(sc->sc_parameters->y_ratio <= UATP_MAX_Y_RATIO); 963 aprint_verbose_dev(self, 964 "%u x sensors, scaled by %u for %u points on screen\n", 965 sc->sc_parameters->x_sensors, sc->sc_parameters->x_ratio, 966 sc->sc_parameters->x_sensors * sc->sc_parameters->x_ratio); 967 aprint_verbose_dev(self, 968 "%u y sensors, scaled by %u for %u points on screen\n", 969 sc->sc_parameters->y_sensors, sc->sc_parameters->y_ratio, 970 sc->sc_parameters->y_sensors * sc->sc_parameters->y_ratio); 971 if (sc->sc_parameters->initialize) 972 sc->sc_parameters->initialize(sc); 973 974 /* Register with pmf. Nothing special for suspend/resume. */ 975 if (!pmf_device_register(self, NULL, NULL)) 976 aprint_error_dev(self, "couldn't establish power handler\n"); 977 978 /* Initialize knobs and create sysctl subtree to tweak them. */ 979 sc->sc_knobs = default_knobs; 980 uatp_setup_sysctl(sc); 981 982 /* Initialize tapping. */ 983 tap_initialize(sc); 984 985 /* Attach wsmouse. */ 986 a.accessops = &uatp_accessops; 987 a.accesscookie = sc; 988 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint, CFARGS_NONE); 989 } 990 991 /* Sysctl setup */ 992 993 static void 994 uatp_setup_sysctl(struct uatp_softc *sc) 995 { 996 int error; 997 998 error = sysctl_createv(&sc->sc_log, 0, NULL, &sc->sc_node, 0, 999 CTLTYPE_NODE, device_xname(uatp_dev(sc)), 1000 SYSCTL_DESCR("uatp configuration knobs"), 1001 NULL, 0, NULL, 0, 1002 CTL_HW, CTL_CREATE, CTL_EOL); 1003 if (error != 0) { 1004 aprint_error_dev(uatp_dev(sc), 1005 "unable to set up sysctl tree hw.%s: %d\n", 1006 device_xname(uatp_dev(sc)), error); 1007 goto err; 1008 } 1009 1010 #if UATP_DEBUG 1011 if (!uatp_setup_sysctl_knob(sc, &sc->sc_debug_flags, "debug", 1012 "uatp(4) debug flags")) 1013 goto err; 1014 #endif 1015 1016 /* 1017 * Button emulation. 1018 */ 1019 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.two_finger_buttons, 1020 "two_finger_buttons", 1021 "buttons to emulate with two fingers on trackpad")) 1022 goto err; 1023 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.three_finger_buttons, 1024 "three_finger_buttons", 1025 "buttons to emulate with three fingers on trackpad")) 1026 goto err; 1027 1028 #if 0 1029 /* 1030 * Edge scrolling. 1031 */ 1032 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.top_edge, "top_edge", 1033 "width of top edge for edge scrolling")) 1034 goto err; 1035 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.bottom_edge, 1036 "bottom_edge", "width of bottom edge for edge scrolling")) 1037 goto err; 1038 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.left_edge, "left_edge", 1039 "width of left edge for edge scrolling")) 1040 goto err; 1041 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.right_edge, "right_edge", 1042 "width of right edge for edge scrolling")) 1043 goto err; 1044 #endif 1045 1046 /* 1047 * Multifinger tracking. 1048 */ 1049 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.multifinger_track, 1050 "multifinger_track", 1051 "0 to ignore multiple fingers, 1 to reset, 2 to scroll")) 1052 goto err; 1053 1054 /* 1055 * Sensor parameters. 1056 */ 1057 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.x_sensors, "x_sensors", 1058 "number of x sensors")) 1059 goto err; 1060 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.x_ratio, "x_ratio", 1061 "screen width to trackpad width ratio")) 1062 goto err; 1063 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.y_sensors, "y_sensors", 1064 "number of y sensors")) 1065 goto err; 1066 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.y_ratio, "y_ratio", 1067 "screen height to trackpad height ratio")) 1068 goto err; 1069 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.sensor_threshold, 1070 "sensor_threshold", "sensor threshold")) 1071 goto err; 1072 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.sensor_normalizer, 1073 "sensor_normalizer", "sensor normalizer")) 1074 goto err; 1075 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.palm_width, 1076 "palm_width", "lower bound on width/height of palm")) 1077 goto err; 1078 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.old_raw_weight, 1079 "old_raw_weight", "weight of old raw position")) 1080 goto err; 1081 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.old_smoothed_weight, 1082 "old_smoothed_weight", "weight of old smoothed position")) 1083 goto err; 1084 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.new_raw_weight, 1085 "new_raw_weight", "weight of new raw position")) 1086 goto err; 1087 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_remainder, 1088 "motion_remainder", "remember motion division remainder")) 1089 goto err; 1090 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_threshold, 1091 "motion_threshold", "threshold before finger moves cursor")) 1092 goto err; 1093 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_multiplier, 1094 "motion_multiplier", "numerator of motion scale")) 1095 goto err; 1096 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_divisor, 1097 "motion_divisor", "divisor of motion scale")) 1098 goto err; 1099 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_threshold, 1100 "fast_motion_threshold", "threshold before fast motion")) 1101 goto err; 1102 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_multiplier, 1103 "fast_motion_multiplier", "numerator of fast motion scale")) 1104 goto err; 1105 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_motion_divisor, 1106 "fast_motion_divisor", "divisor of fast motion scale")) 1107 goto err; 1108 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.fast_per_direction, 1109 "fast_per_direction", "don't frobnitz the veeblefitzer!")) 1110 goto err; 1111 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.motion_delay, 1112 "motion_delay", "number of packets before motion kicks in")) 1113 goto err; 1114 1115 /* 1116 * Tapping. 1117 */ 1118 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.tap_limit_msec, 1119 "tap_limit_msec", "milliseconds before a touch is not a tap")) 1120 goto err; 1121 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.double_tap_limit_msec, 1122 "double_tap_limit_msec", 1123 "milliseconds before a second tap keeps the button down")) 1124 goto err; 1125 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.one_finger_tap_buttons, 1126 "one_finger_tap_buttons", "buttons for one-finger taps")) 1127 goto err; 1128 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.two_finger_tap_buttons, 1129 "two_finger_tap_buttons", "buttons for two-finger taps")) 1130 goto err; 1131 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.three_finger_tap_buttons, 1132 "three_finger_tap_buttons", "buttons for three-finger taps")) 1133 goto err; 1134 if (!uatp_setup_sysctl_knob(sc, &sc->sc_knobs.tap_track_distance_limit, 1135 "tap_track_distance_limit", 1136 "maximum distance^2 of tracking during tap")) 1137 goto err; 1138 1139 return; 1140 1141 err: 1142 sysctl_teardown(&sc->sc_log); 1143 sc->sc_node = NULL; 1144 } 1145 1146 static bool 1147 uatp_setup_sysctl_knob(struct uatp_softc *sc, int *ptr, const char *name, 1148 const char *description) 1149 { 1150 int error; 1151 1152 error = sysctl_createv(&sc->sc_log, 0, NULL, NULL, CTLFLAG_READWRITE, 1153 CTLTYPE_INT, name, SYSCTL_DESCR(description), 1154 NULL, 0, ptr, 0, 1155 CTL_HW, sc->sc_node->sysctl_num, CTL_CREATE, CTL_EOL); 1156 if (error != 0) { 1157 aprint_error_dev(uatp_dev(sc), 1158 "unable to setup sysctl node hw.%s.%s: %d\n", 1159 device_xname(uatp_dev(sc)), name, error); 1160 return false; 1161 } 1162 1163 return true; 1164 } 1165 1166 /* More driver goop */ 1167 1168 static void 1169 uatp_childdet(device_t self, device_t child) 1170 { 1171 struct uatp_softc *sc = device_private(self); 1172 1173 DPRINTF(sc, UATP_DEBUG_MISC, ("detaching child %s\n", 1174 device_xname(child))); 1175 1176 /* Our only child is the wsmouse device. */ 1177 if (child == sc->sc_wsmousedev) 1178 sc->sc_wsmousedev = NULL; 1179 } 1180 1181 static int 1182 uatp_detach(device_t self, int flags) 1183 { 1184 struct uatp_softc *sc = device_private(self); 1185 1186 DPRINTF(sc, UATP_DEBUG_MISC, ("detaching with flags %d\n", flags)); 1187 1188 if (sc->sc_status & UATP_ENABLED) { 1189 aprint_error_dev(uatp_dev(sc), "can't detach while enabled\n"); 1190 return EBUSY; 1191 } 1192 1193 if (sc->sc_parameters->finalize) { 1194 int error = sc->sc_parameters->finalize(sc); 1195 if (error != 0) 1196 return error; 1197 } 1198 1199 pmf_device_deregister(self); 1200 1201 sysctl_teardown(&sc->sc_log); 1202 sc->sc_node = NULL; 1203 1204 tap_finalize(sc); 1205 1206 return config_detach_children(self, flags); 1207 } 1208 1209 static int 1210 uatp_activate(device_t self, enum devact act) 1211 { 1212 struct uatp_softc *sc = device_private(self); 1213 1214 DPRINTF(sc, UATP_DEBUG_MISC, ("act %d\n", (int)act)); 1215 1216 if (act != DVACT_DEACTIVATE) 1217 return EOPNOTSUPP; 1218 1219 sc->sc_status |= UATP_DYING; 1220 1221 return 0; 1222 } 1223 1224 /* wsmouse routines */ 1225 1226 static int 1227 uatp_enable(void *v) 1228 { 1229 struct uatp_softc *sc = v; 1230 1231 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("enabling wsmouse\n")); 1232 1233 /* Refuse to enable if we've been deactivated. */ 1234 if (sc->sc_status & UATP_DYING) { 1235 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("busy dying\n")); 1236 return EIO; 1237 } 1238 1239 /* Refuse to enable if we already are enabled. */ 1240 if (sc->sc_status & UATP_ENABLED) { 1241 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("already enabled\n")); 1242 return EBUSY; 1243 } 1244 1245 sc->sc_status |= UATP_ENABLED; 1246 sc->sc_status &=~ UATP_VALID; 1247 sc->sc_input_index = 0; 1248 tap_enable(sc); 1249 uatp_clear_position(sc); 1250 1251 DPRINTF(sc, UATP_DEBUG_MISC, ("uhidev_open(%p)\n", &sc->sc_hdev)); 1252 return uhidev_open(&sc->sc_hdev); 1253 } 1254 1255 static void 1256 uatp_disable(void *v) 1257 { 1258 struct uatp_softc *sc = v; 1259 1260 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("disabling wsmouse\n")); 1261 1262 if (!(sc->sc_status & UATP_ENABLED)) { 1263 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("not enabled\n")); 1264 return; 1265 } 1266 1267 tap_disable(sc); 1268 sc->sc_status &=~ UATP_ENABLED; 1269 1270 DPRINTF(sc, UATP_DEBUG_MISC, ("uhidev_close(%p)\n", &sc->sc_hdev)); 1271 uhidev_close(&sc->sc_hdev); 1272 } 1273 1274 static int 1275 uatp_ioctl(void *v, unsigned long cmd, void *data, int flag, struct lwp *p) 1276 { 1277 1278 DPRINTF((struct uatp_softc*)v, UATP_DEBUG_IOCTL, 1279 ("cmd %lx, data %p, flag %x, lwp %p\n", cmd, data, flag, p)); 1280 1281 /* XXX Implement any relevant wsmouse(4) ioctls. */ 1282 return EPASSTHROUGH; 1283 } 1284 1285 /* 1286 * The Geyser 3 and 4 models talk the generic USB HID mouse protocol by 1287 * default. This mode switch makes them give raw sensor data instead 1288 * so that we can implement tapping, two-finger scrolling, &c. 1289 */ 1290 1291 #define GEYSER34_RAW_MODE 0x04 1292 #define GEYSER34_MODE_REPORT_ID 0 1293 #define GEYSER34_MODE_INTERFACE 0 1294 #define GEYSER34_MODE_PACKET_SIZE 8 1295 1296 static void 1297 geyser34_enable_raw_mode(struct uatp_softc *sc) 1298 { 1299 struct usbd_device *udev = sc->sc_hdev.sc_parent->sc_udev; 1300 usb_device_request_t req; 1301 usbd_status status; 1302 uint8_t report[GEYSER34_MODE_PACKET_SIZE]; 1303 1304 req.bmRequestType = UT_READ_CLASS_INTERFACE; 1305 req.bRequest = UR_GET_REPORT; 1306 USETW2(req.wValue, UHID_FEATURE_REPORT, GEYSER34_MODE_REPORT_ID); 1307 USETW(req.wIndex, GEYSER34_MODE_INTERFACE); 1308 USETW(req.wLength, GEYSER34_MODE_PACKET_SIZE); 1309 1310 DPRINTF(sc, UATP_DEBUG_RESET, ("get feature report\n")); 1311 status = usbd_do_request(udev, &req, report); 1312 if (status != USBD_NORMAL_COMPLETION) { 1313 aprint_error_dev(uatp_dev(sc), 1314 "error reading feature report: %s\n", usbd_errstr(status)); 1315 return; 1316 } 1317 1318 #if UATP_DEBUG 1319 if (sc->sc_debug_flags & UATP_DEBUG_RESET) { 1320 unsigned int i; 1321 DPRINTF(sc, UATP_DEBUG_RESET, ("old feature report:")); 1322 for (i = 0; i < GEYSER34_MODE_PACKET_SIZE; i++) 1323 printf(" %02x", (unsigned int)report[i]); 1324 printf("\n"); 1325 /* Doing this twice is harmless here and lets this be 1326 * one ifdef. */ 1327 report[0] = GEYSER34_RAW_MODE; 1328 DPRINTF(sc, UATP_DEBUG_RESET, ("new feature report:")); 1329 for (i = 0; i < GEYSER34_MODE_PACKET_SIZE; i++) 1330 printf(" %02x", (unsigned int)report[i]); 1331 printf("\n"); 1332 } 1333 #endif 1334 1335 report[0] = GEYSER34_RAW_MODE; 1336 1337 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 1338 req.bRequest = UR_SET_REPORT; 1339 USETW2(req.wValue, UHID_FEATURE_REPORT, GEYSER34_MODE_REPORT_ID); 1340 USETW(req.wIndex, GEYSER34_MODE_INTERFACE); 1341 USETW(req.wLength, GEYSER34_MODE_PACKET_SIZE); 1342 1343 DPRINTF(sc, UATP_DEBUG_RESET, ("set feature report\n")); 1344 status = usbd_do_request(udev, &req, report); 1345 if (status != USBD_NORMAL_COMPLETION) { 1346 aprint_error_dev(uatp_dev(sc), 1347 "error writing feature report: %s\n", usbd_errstr(status)); 1348 return; 1349 } 1350 } 1351 1352 /* 1353 * The Geyser 3 and 4 need to be reset periodically after we detect a 1354 * continual flow of spurious interrupts. We use a USB task for this. 1355 */ 1356 1357 static void 1358 geyser34_initialize(struct uatp_softc *sc) 1359 { 1360 1361 DPRINTF(sc, UATP_DEBUG_MISC, ("initializing\n")); 1362 geyser34_enable_raw_mode(sc); 1363 usb_init_task(&sc->sc_reset_task, &geyser34_reset_task, sc, 0); 1364 } 1365 1366 static int 1367 geyser34_finalize(struct uatp_softc *sc) 1368 { 1369 1370 DPRINTF(sc, UATP_DEBUG_MISC, ("finalizing\n")); 1371 usb_rem_task_wait(sc->sc_hdev.sc_parent->sc_udev, &sc->sc_reset_task, 1372 USB_TASKQ_DRIVER, NULL); 1373 1374 return 0; 1375 } 1376 1377 static void 1378 geyser34_deferred_reset(struct uatp_softc *sc) 1379 { 1380 1381 DPRINTF(sc, UATP_DEBUG_RESET, ("deferring reset\n")); 1382 usb_add_task(sc->sc_hdev.sc_parent->sc_udev, &sc->sc_reset_task, 1383 USB_TASKQ_DRIVER); 1384 } 1385 1386 static void 1387 geyser34_reset_task(void *arg) 1388 { 1389 struct uatp_softc *sc = arg; 1390 1391 DPRINTF(sc, UATP_DEBUG_RESET, ("resetting\n")); 1392 1393 /* Reset by putting it into raw mode. Not sure why. */ 1394 geyser34_enable_raw_mode(sc); 1395 } 1396 1397 /* Interrupt handler */ 1398 1399 static void 1400 uatp_intr(struct uhidev *addr, void *ibuf, unsigned int len) 1401 { 1402 struct uatp_softc *sc = (struct uatp_softc *)addr; 1403 uint8_t *input; 1404 int dx, dy, dz, dw; 1405 uint32_t buttons; 1406 1407 DPRINTF(sc, UATP_DEBUG_INTR, ("softc %p, ibuf %p, len %u\n", 1408 addr, ibuf, len)); 1409 1410 /* 1411 * Some devices break packets up into chunks, so we accumulate 1412 * input up to the expected packet length, or if it would 1413 * overflow, discard the whole packet and start over. 1414 */ 1415 if (sc->sc_input_size < len) { 1416 aprint_error_dev(uatp_dev(sc), 1417 "discarding %u-byte input packet\n", len); 1418 sc->sc_input_index = 0; 1419 return; 1420 } else if (sc->sc_input_size < (sc->sc_input_index + len)) { 1421 aprint_error_dev(uatp_dev(sc), "discarding %u-byte input\n", 1422 (sc->sc_input_index + len)); 1423 sc->sc_input_index = 0; 1424 return; 1425 } else if (sc->sc_input_size == 81 && len == 17 && 1426 sc->sc_input_index != 64) { 1427 /* 1428 * Quirk of Fountain and Geyser 1 devices: a 17-byte 1429 * packet seems to mean the last one, but sometimes we 1430 * get desynchronized, so drop this one and start over 1431 * if we see a 17-byte packet that's not at the end. 1432 */ 1433 aprint_error_dev(uatp_dev(sc), 1434 "discarding 17-byte nonterminal input at %u\n", 1435 sc->sc_input_index); 1436 sc->sc_input_index = 0; 1437 return; 1438 } 1439 1440 #if UATP_DEBUG 1441 if (sc->sc_debug_flags & UATP_DEBUG_INTR) { 1442 unsigned int i; 1443 uint8_t *bytes = ibuf; 1444 DPRINTF(sc, UATP_DEBUG_INTR, ("raw")); 1445 for (i = 0; i < len; i++) 1446 printf(" %02x", (unsigned int)bytes[i]); 1447 printf("\n"); 1448 } 1449 #endif 1450 1451 memcpy(&sc->sc_input[sc->sc_input_index], ibuf, len); 1452 sc->sc_input_index += len; 1453 if (sc->sc_input_index != sc->sc_input_size) { 1454 /* Wait until packet is complete. */ 1455 DPRINTF(sc, UATP_DEBUG_INTR, ("partial packet: %u bytes\n", 1456 len)); 1457 return; 1458 } 1459 1460 /* Clear the buffer and process the now complete packet. */ 1461 sc->sc_input_index = 0; 1462 input = sc->sc_input; 1463 1464 /* The last byte's first bit is set iff the button is pressed. 1465 * XXX Left button should have a name. */ 1466 buttons = ((input[sc->sc_input_size - 1] & UATP_STATUS_BUTTON) 1467 ? 1 : 0); 1468 1469 /* Read the sample. */ 1470 memset(uatp_x_sample(sc), 0, UATP_MAX_X_SENSORS); 1471 memset(uatp_y_sample(sc), 0, UATP_MAX_Y_SENSORS); 1472 sc->sc_parameters->read_sample(uatp_x_sample(sc), uatp_y_sample(sc), 1473 input); 1474 1475 #if UATP_DEBUG 1476 if (sc->sc_debug_flags & UATP_DEBUG_INTR) { 1477 unsigned int i; 1478 DPRINTF(sc, UATP_DEBUG_INTR, ("x sensors")); 1479 for (i = 0; i < uatp_x_sensors(sc); i++) 1480 printf(" %02x", (unsigned int)uatp_x_sample(sc)[i]); 1481 printf("\n"); 1482 DPRINTF(sc, UATP_DEBUG_INTR, ("y sensors")); 1483 for (i = 0; i < uatp_y_sensors(sc); i++) 1484 printf(" %02x", (unsigned int)uatp_y_sample(sc)[i]); 1485 printf("\n"); 1486 } else if ((sc->sc_debug_flags & UATP_DEBUG_STATUS) && 1487 (input[sc->sc_input_size - 1] &~ 1488 (UATP_STATUS_BUTTON | UATP_STATUS_BASE | 1489 UATP_STATUS_POST_RESET))) 1490 DPRINTF(sc, UATP_DEBUG_STATUS, ("status byte: %02x\n", 1491 input[sc->sc_input_size - 1])); 1492 #endif 1493 1494 /* 1495 * If this is a base sample, initialize the state to interpret 1496 * subsequent samples relative to it, and stop here. 1497 */ 1498 if (sc->sc_parameters->base_sample(sc, input)) { 1499 DPRINTF(sc, UATP_DEBUG_PARSE, 1500 ("base sample, buttons %"PRIx32"\n", buttons)); 1501 /* XXX Should the valid bit ever be reset? */ 1502 sc->sc_status |= UATP_VALID; 1503 uatp_clear_position(sc); 1504 memcpy(sc->sc_base, sc->sc_sample, sizeof(sc->sc_base)); 1505 /* XXX Perform 17" size detection like Linux? */ 1506 return; 1507 } 1508 1509 /* If not, accumulate the change in the sensors. */ 1510 sc->sc_parameters->accumulate(sc); 1511 1512 #if UATP_DEBUG 1513 if (sc->sc_debug_flags & UATP_DEBUG_ACCUMULATE) { 1514 unsigned int i; 1515 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, ("accumulated x state:")); 1516 for (i = 0; i < uatp_x_sensors(sc); i++) 1517 printf(" %02x", (unsigned int)uatp_x_acc(sc)[i]); 1518 printf("\n"); 1519 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, ("accumulated y state:")); 1520 for (i = 0; i < uatp_y_sensors(sc); i++) 1521 printf(" %02x", (unsigned int)uatp_y_acc(sc)[i]); 1522 printf("\n"); 1523 } 1524 #endif 1525 1526 /* Compute the change in coordinates and buttons. */ 1527 dx = dy = dz = dw = 0; 1528 if ((!interpret_input(sc, &dx, &dy, &dz, &dw, &buttons)) && 1529 /* If there's no input because we're releasing a button, 1530 * then it's not spurious. XXX Mutex? */ 1531 (sc->sc_buttons == 0)) { 1532 DPRINTF(sc, UATP_DEBUG_SPURINTR, ("spurious interrupt\n")); 1533 if (sc->sc_parameters->reset) 1534 sc->sc_parameters->reset(sc); 1535 return; 1536 } 1537 1538 /* Report to wsmouse. */ 1539 DPRINTF(sc, UATP_DEBUG_INTR, 1540 ("buttons %"PRIx32", dx %d, dy %d, dz %d, dw %d\n", 1541 buttons, dx, dy, dz, dw)); 1542 mutex_enter(&sc->sc_tap_mutex); 1543 uatp_input(sc, buttons, dx, dy, dz, dw); 1544 mutex_exit(&sc->sc_tap_mutex); 1545 } 1546 1547 /* 1548 * Different ways to discern the base sample initializing the state. 1549 * `base_sample_softc_flag' uses a state flag stored in the softc; 1550 * `base_sample_input_flag' checks a flag at the end of the input 1551 * packet. 1552 */ 1553 1554 static bool 1555 base_sample_softc_flag(const struct uatp_softc *sc, const uint8_t *input) 1556 { 1557 return !(sc->sc_status & UATP_VALID); 1558 } 1559 1560 static bool 1561 base_sample_input_flag(const struct uatp_softc *sc, const uint8_t *input) 1562 { 1563 /* XXX Should we also check the valid flag? */ 1564 return !!(input[sc->sc_input_size - 1] & UATP_STATUS_BASE); 1565 } 1566 1567 /* 1568 * Pick apart the horizontal sensors from the vertical sensors. 1569 * Different models interleave them in different orders. 1570 */ 1571 1572 static void 1573 read_sample_1(uint8_t *x, uint8_t *y, const uint8_t *input) 1574 { 1575 unsigned int i; 1576 1577 for (i = 0; i < 8; i++) { 1578 x[i] = input[5 * i + 2]; 1579 x[i + 8] = input[5 * i + 4]; 1580 x[i + 16] = input[5 * i + 42]; 1581 if (i < 2) 1582 x[i + 24] = input[5 * i + 44]; 1583 1584 y[i] = input[5 * i + 1]; 1585 y[i + 8] = input[5 * i + 3]; 1586 } 1587 } 1588 1589 static void 1590 read_sample_2(uint8_t *x, uint8_t *y, const uint8_t *input) 1591 { 1592 unsigned int i, j; 1593 1594 for (i = 0, j = 19; i < 20; i += 2, j += 3) { 1595 x[i] = input[j]; 1596 x[i + 1] = input[j + 1]; 1597 } 1598 1599 for (i = 0, j = 1; i < 9; i += 2, j += 3) { 1600 y[i] = input[j]; 1601 y[i + 1] = input[j + 1]; 1602 } 1603 } 1604 1605 static void 1606 accumulate_sample_1(struct uatp_softc *sc) 1607 { 1608 unsigned int i; 1609 1610 for (i = 0; i < UATP_SENSORS; i++) { 1611 sc->sc_acc[i] += (int8_t)(sc->sc_sample[i] - sc->sc_base[i]); 1612 if (sc->sc_acc[i] < 0) { 1613 sc->sc_acc[i] = 0; 1614 } else if (UATP_MAX_ACC < sc->sc_acc[i]) { 1615 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1616 ("overflow %d\n", sc->sc_acc[i])); 1617 sc->sc_acc[i] = UATP_MAX_ACC; 1618 } 1619 } 1620 1621 memcpy(sc->sc_base, sc->sc_sample, sizeof(sc->sc_base)); 1622 } 1623 1624 static void 1625 accumulate_sample_2(struct uatp_softc *sc) 1626 { 1627 unsigned int i; 1628 1629 for (i = 0; i < UATP_SENSORS; i++) { 1630 sc->sc_acc[i] = (int8_t)(sc->sc_sample[i] - sc->sc_base[i]); 1631 if (sc->sc_acc[i] < -0x80) { 1632 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1633 ("underflow %u - %u = %d\n", 1634 (unsigned int)sc->sc_sample[i], 1635 (unsigned int)sc->sc_base[i], 1636 sc->sc_acc[i])); 1637 sc->sc_acc[i] += 0x100; 1638 } 1639 if (0x7f < sc->sc_acc[i]) { 1640 DPRINTF(sc, UATP_DEBUG_ACCUMULATE, 1641 ("overflow %u - %u = %d\n", 1642 (unsigned int)sc->sc_sample[i], 1643 (unsigned int)sc->sc_base[i], 1644 sc->sc_acc[i])); 1645 sc->sc_acc[i] -= 0x100; 1646 } 1647 if (sc->sc_acc[i] < 0) 1648 sc->sc_acc[i] = 0; 1649 } 1650 } 1651 1652 /* 1653 * Report input to wsmouse, if there is anything interesting to report. 1654 * We must take into consideration the current tap-and-drag button 1655 * state. 1656 */ 1657 1658 static void 1659 uatp_input(struct uatp_softc *sc, uint32_t buttons, 1660 int dx, int dy, int dz, int dw) 1661 { 1662 uint32_t all_buttons; 1663 1664 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 1665 all_buttons = buttons | uatp_tapped_buttons(sc); 1666 1667 if ((sc->sc_wsmousedev != NULL) && 1668 ((dx != 0) || (dy != 0) || (dz != 0) || (dw != 0) || 1669 (all_buttons != sc->sc_all_buttons))) { 1670 int s = spltty(); 1671 DPRINTF(sc, UATP_DEBUG_WSMOUSE, ("wsmouse input:" 1672 " buttons %"PRIx32", dx %d, dy %d, dz %d, dw %d\n", 1673 all_buttons, dx, -dy, dz, -dw)); 1674 wsmouse_input(sc->sc_wsmousedev, all_buttons, dx, -dy, dz, -dw, 1675 WSMOUSE_INPUT_DELTA); 1676 splx(s); 1677 } 1678 sc->sc_buttons = buttons; 1679 sc->sc_all_buttons = all_buttons; 1680 } 1681 1682 /* 1683 * Interpret the current tap state to decide whether the tap buttons 1684 * are currently pressed. 1685 */ 1686 1687 static uint32_t 1688 uatp_tapped_buttons(struct uatp_softc *sc) 1689 { 1690 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 1691 switch (sc->sc_tap_state) { 1692 case TAP_STATE_INITIAL: 1693 case TAP_STATE_TAPPING: 1694 return 0; 1695 1696 case TAP_STATE_TAPPED: 1697 case TAP_STATE_DOUBLE_TAPPING: 1698 case TAP_STATE_DRAGGING_DOWN: 1699 case TAP_STATE_DRAGGING_UP: 1700 case TAP_STATE_TAPPING_IN_DRAG: 1701 CHECK((0 < sc->sc_tapped_fingers), return 0); 1702 switch (sc->sc_tapped_fingers) { 1703 case 1: return sc->sc_knobs.one_finger_tap_buttons; 1704 case 2: return sc->sc_knobs.two_finger_tap_buttons; 1705 case 3: 1706 default: return sc->sc_knobs.three_finger_tap_buttons; 1707 } 1708 1709 default: 1710 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 1711 __func__, sc->sc_tap_state); 1712 return 0; 1713 } 1714 } 1715 1716 /* 1717 * Interpret the current input state to find a difference in all the 1718 * relevant coordinates and buttons to pass on to wsmouse, and update 1719 * any internal driver state necessary to interpret subsequent input 1720 * relative to this one. 1721 */ 1722 1723 static bool 1724 interpret_input(struct uatp_softc *sc, int *dx, int *dy, int *dz, int *dw, 1725 uint32_t *buttons) 1726 { 1727 unsigned int x_pressure, x_raw, x_fingers; 1728 unsigned int y_pressure, y_raw, y_fingers; 1729 unsigned int fingers; 1730 1731 x_pressure = interpret_dimension(sc, uatp_x_acc(sc), 1732 uatp_x_sensors(sc), uatp_x_ratio(sc), &x_raw, &x_fingers); 1733 y_pressure = interpret_dimension(sc, uatp_y_acc(sc), 1734 uatp_y_sensors(sc), uatp_y_ratio(sc), &y_raw, &y_fingers); 1735 1736 DPRINTF(sc, UATP_DEBUG_PARSE, 1737 ("x %u @ %u, %uf; y %u @ %u, %uf; buttons %"PRIx32"\n", 1738 x_pressure, x_raw, x_fingers, 1739 y_pressure, y_raw, y_fingers, 1740 *buttons)); 1741 1742 if ((x_pressure == 0) && (y_pressure == 0)) { 1743 bool ok; 1744 /* No fingers: clear position and maybe report a tap. */ 1745 DPRINTF(sc, UATP_DEBUG_INTR, 1746 ("no position detected; clearing position\n")); 1747 if (*buttons == 0) { 1748 ok = tap_released(sc); 1749 } else { 1750 tap_reset(sc); 1751 /* Button pressed: interrupt is not spurious. */ 1752 ok = true; 1753 } 1754 /* 1755 * Don't clear the position until after tap_released, 1756 * which needs to know the track distance. 1757 */ 1758 uatp_clear_position(sc); 1759 return ok; 1760 } else if ((x_pressure == 0) || (y_pressure == 0)) { 1761 /* XXX What to do here? */ 1762 DPRINTF(sc, UATP_DEBUG_INTR, 1763 ("pressure in only one dimension; ignoring\n")); 1764 return true; 1765 } else if ((x_pressure == 1) && (y_pressure == 1)) { 1766 fingers = uimax(x_fingers, y_fingers); 1767 CHECK((0 < fingers), return false); 1768 if (*buttons == 0) 1769 tap_touched(sc, fingers); 1770 else if (fingers == 1) 1771 tap_reset(sc); 1772 else /* Multiple fingers, button pressed. */ 1773 *buttons = emulated_buttons(sc, fingers); 1774 update_position(sc, fingers, x_raw, y_raw, dx, dy, dz, dw); 1775 return true; 1776 } else { 1777 /* Palm detected in either or both of the dimensions. */ 1778 DPRINTF(sc, UATP_DEBUG_INTR, ("palm detected; ignoring\n")); 1779 return true; 1780 } 1781 } 1782 1783 /* 1784 * Interpret the accumulated sensor state along one dimension to find 1785 * the number, mean position, and pressure of fingers. Returns 0 to 1786 * indicate no pressure, returns 1 and sets *position and *fingers to 1787 * indicate fingers, and returns 2 to indicate palm. 1788 * 1789 * XXX Give symbolic names to the return values. 1790 */ 1791 1792 static unsigned int 1793 interpret_dimension(struct uatp_softc *sc, const int *acc, 1794 unsigned int n_sensors, unsigned int ratio, 1795 unsigned int *position, unsigned int *fingers) 1796 { 1797 unsigned int i, v, n_fingers, sum; 1798 unsigned int total[UATP_MAX_SENSORS]; 1799 unsigned int weighted[UATP_MAX_SENSORS]; 1800 unsigned int sensor_threshold = sc->sc_knobs.sensor_threshold; 1801 unsigned int sensor_normalizer = sc->sc_knobs.sensor_normalizer; 1802 unsigned int width = 0; /* GCC is not smart enough. */ 1803 unsigned int palm_width = sc->sc_knobs.palm_width; 1804 enum { none, nondecreasing, decreasing } state = none; 1805 1806 if (sensor_threshold < sensor_normalizer) 1807 sensor_normalizer = sensor_threshold; 1808 if (palm_width == 0) /* Effectively disable palm detection. */ 1809 palm_width = UATP_MAX_POSITION; 1810 1811 #define CHECK_(condition) CHECK(condition, return 0) 1812 1813 /* 1814 * Arithmetic bounds: 1815 * . n_sensors is at most UATP_MAX_SENSORS, 1816 * . n_fingers is at most UATP_MAX_SENSORS, 1817 * . i is at most UATP_MAX_SENSORS, 1818 * . sc->sc_acc[i] is at most UATP_MAX_ACC, 1819 * . i * sc->sc_acc[i] is at most UATP_MAX_SENSORS * UATP_MAX_ACC, 1820 * . each total[j] is at most UATP_MAX_SENSORS * UATP_MAX_ACC, 1821 * . each weighted[j] is at most UATP_MAX_SENSORS^2 * UATP_MAX_ACC, 1822 * . ratio is at most UATP_MAX_RATIO, 1823 * . each weighted[j] * ratio is at most 1824 * UATP_MAX_SENSORS^2 * UATP_MAX_ACC * UATP_MAX_RATIO, 1825 * which is #x5fa0000 with the current values of the constants, 1826 * and 1827 * . the sum of the positions is at most 1828 * UATP_MAX_SENSORS * UATP_MAX_POSITION, 1829 * which is #x60000 with the current values of the constants. 1830 * Hence all of the arithmetic here fits in int (and thus also 1831 * unsigned int). If you change the constants, though, you 1832 * must update the analysis. 1833 */ 1834 __CTASSERT(0x5fa0000 == (UATP_MAX_SENSORS * UATP_MAX_SENSORS * 1835 UATP_MAX_ACC * UATP_MAX_RATIO)); 1836 __CTASSERT(0x60000 == (UATP_MAX_SENSORS * UATP_MAX_POSITION)); 1837 CHECK_(n_sensors <= UATP_MAX_SENSORS); 1838 CHECK_(ratio <= UATP_MAX_RATIO); 1839 1840 /* 1841 * Detect each finger by looking for a consecutive sequence of 1842 * increasing and then decreasing pressures above the sensor 1843 * threshold. Compute the finger's position as the weighted 1844 * average of positions, weighted by the pressure at that 1845 * position. Finally, return the average finger position. 1846 */ 1847 1848 n_fingers = 0; 1849 memset(weighted, 0, sizeof(weighted)); 1850 memset(total, 0, sizeof(total)); 1851 1852 for (i = 0; i < n_sensors; i++) { 1853 CHECK_(0 <= acc[i]); 1854 v = acc[i]; 1855 1856 /* Ignore values outside a sensible interval. */ 1857 if (v <= sensor_threshold) { 1858 state = none; 1859 continue; 1860 } else if (UATP_MAX_ACC < v) { 1861 aprint_verbose_dev(uatp_dev(sc), 1862 "ignoring large accumulated sensor state: %u\n", 1863 v); 1864 continue; 1865 } 1866 1867 switch (state) { 1868 case none: 1869 n_fingers += 1; 1870 CHECK_(n_fingers <= n_sensors); 1871 state = nondecreasing; 1872 width = 1; 1873 break; 1874 1875 case nondecreasing: 1876 case decreasing: 1877 CHECK_(0 < i); 1878 CHECK_(0 <= acc[i - 1]); 1879 width += 1; 1880 if (palm_width <= (width * ratio)) { 1881 DPRINTF(sc, UATP_DEBUG_PALM, 1882 ("palm detected\n")); 1883 return 2; 1884 } else if ((state == nondecreasing) && 1885 ((unsigned int)acc[i - 1] > v)) { 1886 state = decreasing; 1887 } else if ((state == decreasing) && 1888 ((unsigned int)acc[i - 1] < v)) { 1889 n_fingers += 1; 1890 CHECK_(n_fingers <= n_sensors); 1891 state = nondecreasing; 1892 width = 1; 1893 } 1894 break; 1895 1896 default: 1897 aprint_error_dev(uatp_dev(sc), 1898 "bad finger detection state: %d", state); 1899 return 0; 1900 } 1901 1902 v -= sensor_normalizer; 1903 total[n_fingers - 1] += v; 1904 weighted[n_fingers - 1] += (i * v); 1905 CHECK_(total[n_fingers - 1] <= 1906 (UATP_MAX_SENSORS * UATP_MAX_ACC)); 1907 CHECK_(weighted[n_fingers - 1] <= 1908 (UATP_MAX_SENSORS * UATP_MAX_SENSORS * UATP_MAX_ACC)); 1909 } 1910 1911 if (n_fingers == 0) 1912 return 0; 1913 1914 sum = 0; 1915 for (i = 0; i < n_fingers; i++) { 1916 DPRINTF(sc, UATP_DEBUG_PARSE, 1917 ("finger at %u\n", ((weighted[i] * ratio) / total[i]))); 1918 sum += ((weighted[i] * ratio) / total[i]); 1919 CHECK_(sum <= UATP_MAX_SENSORS * UATP_MAX_POSITION); 1920 } 1921 1922 *fingers = n_fingers; 1923 *position = (sum / n_fingers); 1924 return 1; 1925 1926 #undef CHECK_ 1927 } 1928 1929 /* Tapping */ 1930 1931 /* 1932 * There is a very hairy state machine for detecting taps. At every 1933 * touch, we record the maximum number of fingers touched, and don't 1934 * reset it to zero until the finger is released. 1935 * 1936 * INITIAL STATE 1937 * (no tapping fingers; no tapped fingers) 1938 * - On touch, go to TAPPING STATE. 1939 * - On any other input, remain in INITIAL STATE. 1940 * 1941 * TAPPING STATE: Finger touched; might be tap. 1942 * (tapping fingers; no tapped fingers) 1943 * - On release within the tap limit, go to TAPPED STATE. 1944 * - On release after the tap limit, go to INITIAL STATE. 1945 * - On any other input, remain in TAPPING STATE. 1946 * 1947 * TAPPED STATE: Finger recently tapped, and might double-tap. 1948 * (no tapping fingers; tapped fingers) 1949 * - On touch within the double-tap limit, go to DOUBLE-TAPPING STATE. 1950 * - On touch after the double-tap limit, go to TAPPING STATE. 1951 * - On no event after the double-tap limit, go to INITIAL STATE. 1952 * - On any other input, remain in TAPPED STATE. 1953 * 1954 * DOUBLE-TAPPING STATE: Finger touched soon after tap; might be double-tap. 1955 * (tapping fingers; tapped fingers) 1956 * - On release within the tap limit, release button and go to TAPPED STATE. 1957 * - On release after the tap limit, go to DRAGGING UP STATE. 1958 * - On touch after the tap limit, go to DRAGGING DOWN STATE. 1959 * - On any other input, remain in DOUBLE-TAPPING STATE. 1960 * 1961 * DRAGGING DOWN STATE: Finger has double-tapped and is dragging, not tapping. 1962 * (no tapping fingers; tapped fingers) 1963 * - On release, go to DRAGGING UP STATE. 1964 * - On any other input, remain in DRAGGING DOWN STATE. 1965 * 1966 * DRAGGING UP STATE: Finger has double-tapped and is up. 1967 * (no tapping fingers; tapped fingers) 1968 * - On touch, go to TAPPING IN DRAG STATE. 1969 * - On any other input, remain in DRAGGING UP STATE. 1970 * 1971 * TAPPING IN DRAG STATE: Tap-dancing while cross-dressed. 1972 * (tapping fingers; tapped fingers) 1973 * - On release within the tap limit, go to TAPPED STATE. 1974 * - On release after the tap limit, go to DRAGGING UP STATE. 1975 * - On any other input, remain in TAPPING IN DRAG STATE. 1976 * 1977 * Warning: The graph of states is split into two components, those 1978 * with tapped fingers and those without. The only path from any state 1979 * without tapped fingers to a state with tapped fingers must pass 1980 * through TAPPED STATE. Also, the only transitions into TAPPED STATE 1981 * must be from states with tapping fingers, which become the tapped 1982 * fingers. If you edit the state machine, you must either preserve 1983 * these properties, or globally transform the state machine to avoid 1984 * the bad consequences of violating these properties. 1985 */ 1986 1987 static void 1988 uatp_tap_limit(const struct uatp_softc *sc, struct timeval *limit) 1989 { 1990 unsigned int msec = sc->sc_knobs.tap_limit_msec; 1991 limit->tv_sec = 0; 1992 limit->tv_usec = ((msec < 1000) ? (1000 * msec) : 100000); 1993 } 1994 1995 #if UATP_DEBUG 1996 1997 # define TAP_DEBUG_PRE(sc) tap_debug((sc), __func__, "") 1998 # define TAP_DEBUG_POST(sc) tap_debug((sc), __func__, " ->") 1999 2000 static void 2001 tap_debug(struct uatp_softc *sc, const char *caller, const char *prefix) 2002 { 2003 char buffer[128]; 2004 const char *state; 2005 2006 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 2007 switch (sc->sc_tap_state) { 2008 case TAP_STATE_INITIAL: state = "initial"; break; 2009 case TAP_STATE_TAPPING: state = "tapping"; break; 2010 case TAP_STATE_TAPPED: state = "tapped"; break; 2011 case TAP_STATE_DOUBLE_TAPPING: state = "double-tapping"; break; 2012 case TAP_STATE_DRAGGING_DOWN: state = "dragging-down"; break; 2013 case TAP_STATE_DRAGGING_UP: state = "dragging-up"; break; 2014 case TAP_STATE_TAPPING_IN_DRAG: state = "tapping-in-drag"; break; 2015 default: 2016 snprintf(buffer, sizeof(buffer), "unknown (%d)", 2017 sc->sc_tap_state); 2018 state = buffer; 2019 break; 2020 } 2021 2022 DPRINTF(sc, UATP_DEBUG_TAP, 2023 ("%s:%s state %s, %u tapping, %u tapped\n", 2024 caller, prefix, state, 2025 sc->sc_tapping_fingers, sc->sc_tapped_fingers)); 2026 } 2027 2028 #else /* !UATP_DEBUG */ 2029 2030 # define TAP_DEBUG_PRE(sc) do {} while (0) 2031 # define TAP_DEBUG_POST(sc) do {} while (0) 2032 2033 #endif 2034 2035 static void 2036 tap_initialize(struct uatp_softc *sc) 2037 { 2038 callout_init(&sc->sc_untap_callout, 0); 2039 callout_setfunc(&sc->sc_untap_callout, untap_callout, sc); 2040 mutex_init(&sc->sc_tap_mutex, MUTEX_DEFAULT, IPL_SOFTUSB); 2041 } 2042 2043 static void 2044 tap_finalize(struct uatp_softc *sc) 2045 { 2046 /* XXX Can the callout still be scheduled here? */ 2047 callout_destroy(&sc->sc_untap_callout); 2048 mutex_destroy(&sc->sc_tap_mutex); 2049 } 2050 2051 static void 2052 tap_enable(struct uatp_softc *sc) 2053 { 2054 mutex_enter(&sc->sc_tap_mutex); 2055 tap_transition_initial(sc); 2056 sc->sc_buttons = 0; /* XXX Not the right place? */ 2057 sc->sc_all_buttons = 0; 2058 mutex_exit(&sc->sc_tap_mutex); 2059 } 2060 2061 static void 2062 tap_disable(struct uatp_softc *sc) 2063 { 2064 /* Reset tapping, and wait for any callouts to complete. */ 2065 tap_reset_wait(sc); 2066 } 2067 2068 /* 2069 * Reset tap state. If the untap callout has just fired, it may signal 2070 * a harmless button release event before this returns. 2071 */ 2072 2073 static void 2074 tap_reset(struct uatp_softc *sc) 2075 { 2076 2077 callout_stop(&sc->sc_untap_callout); 2078 mutex_enter(&sc->sc_tap_mutex); 2079 tap_transition_initial(sc); 2080 mutex_exit(&sc->sc_tap_mutex); 2081 } 2082 2083 /* Reset, but don't return until the callout is done running. */ 2084 2085 static void 2086 tap_reset_wait(struct uatp_softc *sc) 2087 { 2088 2089 callout_halt(&sc->sc_untap_callout, NULL); 2090 mutex_enter(&sc->sc_tap_mutex); 2091 tap_transition_initial(sc); 2092 mutex_exit(&sc->sc_tap_mutex); 2093 } 2094 2095 static const struct timeval zero_timeval; 2096 2097 static void 2098 tap_transition(struct uatp_softc *sc, enum uatp_tap_state tap_state, 2099 const struct timeval *start_time, 2100 unsigned int tapping_fingers, unsigned int tapped_fingers) 2101 { 2102 KASSERT(mutex_owned(&sc->sc_tap_mutex)); 2103 sc->sc_tap_state = tap_state; 2104 sc->sc_tap_timer = *start_time; 2105 sc->sc_tapping_fingers = tapping_fingers; 2106 sc->sc_tapped_fingers = tapped_fingers; 2107 } 2108 2109 static void 2110 tap_transition_initial(struct uatp_softc *sc) 2111 { 2112 /* 2113 * No checks. This state is always kosher, and sometimes a 2114 * fallback in case of failure. 2115 */ 2116 tap_transition(sc, TAP_STATE_INITIAL, &zero_timeval, 0, 0); 2117 } 2118 2119 /* Touch transitions */ 2120 2121 static void 2122 tap_transition_tapping(struct uatp_softc *sc, const struct timeval *start_time, 2123 unsigned int fingers) 2124 { 2125 CHECK((sc->sc_tapping_fingers <= fingers), 2126 do { tap_transition_initial(sc); return; } while (0)); 2127 tap_transition(sc, TAP_STATE_TAPPING, start_time, fingers, 0); 2128 } 2129 2130 static void 2131 tap_transition_double_tapping(struct uatp_softc *sc, 2132 const struct timeval *start_time, unsigned int fingers) 2133 { 2134 CHECK((sc->sc_tapping_fingers <= fingers), 2135 do { tap_transition_initial(sc); return; } while (0)); 2136 CHECK((0 < sc->sc_tapped_fingers), 2137 do { tap_transition_initial(sc); return; } while (0)); 2138 tap_transition(sc, TAP_STATE_DOUBLE_TAPPING, start_time, fingers, 2139 sc->sc_tapped_fingers); 2140 } 2141 2142 static void 2143 tap_transition_dragging_down(struct uatp_softc *sc) 2144 { 2145 CHECK((0 < sc->sc_tapped_fingers), 2146 do { tap_transition_initial(sc); return; } while (0)); 2147 tap_transition(sc, TAP_STATE_DRAGGING_DOWN, &zero_timeval, 0, 2148 sc->sc_tapped_fingers); 2149 } 2150 2151 static void 2152 tap_transition_tapping_in_drag(struct uatp_softc *sc, 2153 const struct timeval *start_time, unsigned int fingers) 2154 { 2155 CHECK((sc->sc_tapping_fingers <= fingers), 2156 do { tap_transition_initial(sc); return; } while (0)); 2157 CHECK((0 < sc->sc_tapped_fingers), 2158 do { tap_transition_initial(sc); return; } while (0)); 2159 tap_transition(sc, TAP_STATE_TAPPING_IN_DRAG, start_time, fingers, 2160 sc->sc_tapped_fingers); 2161 } 2162 2163 /* Release transitions */ 2164 2165 static void 2166 tap_transition_tapped(struct uatp_softc *sc, const struct timeval *start_time) 2167 { 2168 /* 2169 * The fingers that were tapping -- of which there must have 2170 * been at least one -- are now the fingers that have tapped, 2171 * and there are no longer fingers tapping. 2172 */ 2173 CHECK((0 < sc->sc_tapping_fingers), 2174 do { tap_transition_initial(sc); return; } while (0)); 2175 tap_transition(sc, TAP_STATE_TAPPED, start_time, 0, 2176 sc->sc_tapping_fingers); 2177 schedule_untap(sc); 2178 } 2179 2180 static void 2181 tap_transition_dragging_up(struct uatp_softc *sc) 2182 { 2183 CHECK((0 < sc->sc_tapped_fingers), 2184 do { tap_transition_initial(sc); return; } while (0)); 2185 tap_transition(sc, TAP_STATE_DRAGGING_UP, &zero_timeval, 0, 2186 sc->sc_tapped_fingers); 2187 } 2188 2189 static void 2190 tap_touched(struct uatp_softc *sc, unsigned int fingers) 2191 { 2192 struct timeval now, diff, limit; 2193 2194 CHECK((0 < fingers), return); 2195 callout_stop(&sc->sc_untap_callout); 2196 mutex_enter(&sc->sc_tap_mutex); 2197 TAP_DEBUG_PRE(sc); 2198 /* 2199 * Guarantee that the number of tapping fingers never decreases 2200 * except when it is reset to zero on release. 2201 */ 2202 if (fingers < sc->sc_tapping_fingers) 2203 fingers = sc->sc_tapping_fingers; 2204 switch (sc->sc_tap_state) { 2205 case TAP_STATE_INITIAL: 2206 getmicrouptime(&now); 2207 tap_transition_tapping(sc, &now, fingers); 2208 break; 2209 2210 case TAP_STATE_TAPPING: 2211 /* 2212 * Number of fingers may have increased, so transition 2213 * even though we're already in TAPPING. 2214 */ 2215 tap_transition_tapping(sc, &sc->sc_tap_timer, fingers); 2216 break; 2217 2218 case TAP_STATE_TAPPED: 2219 getmicrouptime(&now); 2220 /* 2221 * If the double-tap time limit has passed, it's the 2222 * callout's responsibility to handle that event, so we 2223 * assume the limit has not passed yet. 2224 */ 2225 tap_transition_double_tapping(sc, &now, fingers); 2226 break; 2227 2228 case TAP_STATE_DOUBLE_TAPPING: 2229 getmicrouptime(&now); 2230 timersub(&now, &sc->sc_tap_timer, &diff); 2231 uatp_tap_limit(sc, &limit); 2232 if (timercmp(&diff, &limit, >) || 2233 (sc->sc_track_distance > 2234 sc->sc_knobs.tap_track_distance_limit)) 2235 tap_transition_dragging_down(sc); 2236 break; 2237 2238 case TAP_STATE_DRAGGING_DOWN: 2239 break; 2240 2241 case TAP_STATE_DRAGGING_UP: 2242 getmicrouptime(&now); 2243 tap_transition_tapping_in_drag(sc, &now, fingers); 2244 break; 2245 2246 case TAP_STATE_TAPPING_IN_DRAG: 2247 /* 2248 * Number of fingers may have increased, so transition 2249 * even though we're already in TAPPING IN DRAG. 2250 */ 2251 tap_transition_tapping_in_drag(sc, &sc->sc_tap_timer, fingers); 2252 break; 2253 2254 default: 2255 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2256 __func__, sc->sc_tap_state); 2257 tap_transition_initial(sc); 2258 break; 2259 } 2260 TAP_DEBUG_POST(sc); 2261 mutex_exit(&sc->sc_tap_mutex); 2262 } 2263 2264 static bool 2265 tap_released(struct uatp_softc *sc) 2266 { 2267 struct timeval now, diff, limit; 2268 void (*non_tapped_transition)(struct uatp_softc *); 2269 bool ok, temporary_release; 2270 2271 mutex_enter(&sc->sc_tap_mutex); 2272 TAP_DEBUG_PRE(sc); 2273 switch (sc->sc_tap_state) { 2274 case TAP_STATE_INITIAL: 2275 case TAP_STATE_TAPPED: 2276 case TAP_STATE_DRAGGING_UP: 2277 /* Spurious interrupt: fingers are already off. */ 2278 ok = false; 2279 break; 2280 2281 case TAP_STATE_TAPPING: 2282 temporary_release = false; 2283 non_tapped_transition = &tap_transition_initial; 2284 goto maybe_tap; 2285 2286 case TAP_STATE_DOUBLE_TAPPING: 2287 temporary_release = true; 2288 non_tapped_transition = &tap_transition_dragging_up; 2289 goto maybe_tap; 2290 2291 case TAP_STATE_TAPPING_IN_DRAG: 2292 temporary_release = false; 2293 non_tapped_transition = &tap_transition_dragging_up; 2294 goto maybe_tap; 2295 2296 maybe_tap: 2297 getmicrouptime(&now); 2298 timersub(&now, &sc->sc_tap_timer, &diff); 2299 uatp_tap_limit(sc, &limit); 2300 if (timercmp(&diff, &limit, <=) && 2301 (sc->sc_track_distance <= 2302 sc->sc_knobs.tap_track_distance_limit)) { 2303 if (temporary_release) { 2304 /* 2305 * XXX Kludge: Temporarily transition 2306 * to a tap state that uatp_input will 2307 * interpret as `no buttons tapped', 2308 * saving the tapping fingers. There 2309 * should instead be a separate routine 2310 * uatp_input_untapped. 2311 */ 2312 unsigned int fingers = sc->sc_tapping_fingers; 2313 tap_transition_initial(sc); 2314 uatp_input(sc, 0, 0, 0, 0, 0); 2315 sc->sc_tapping_fingers = fingers; 2316 } 2317 tap_transition_tapped(sc, &now); 2318 } else { 2319 (*non_tapped_transition)(sc); 2320 } 2321 ok = true; 2322 break; 2323 2324 case TAP_STATE_DRAGGING_DOWN: 2325 tap_transition_dragging_up(sc); 2326 ok = true; 2327 break; 2328 2329 default: 2330 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2331 __func__, sc->sc_tap_state); 2332 tap_transition_initial(sc); 2333 ok = false; 2334 break; 2335 } 2336 TAP_DEBUG_POST(sc); 2337 mutex_exit(&sc->sc_tap_mutex); 2338 return ok; 2339 } 2340 2341 /* Untapping: Releasing the button after a tap */ 2342 2343 static void 2344 schedule_untap(struct uatp_softc *sc) 2345 { 2346 unsigned int ms = sc->sc_knobs.double_tap_limit_msec; 2347 if (ms <= 1000) 2348 callout_schedule(&sc->sc_untap_callout, mstohz(ms)); 2349 else /* XXX Reject bogus values in sysctl. */ 2350 aprint_error_dev(uatp_dev(sc), 2351 "double-tap delay too long: %ums\n", ms); 2352 } 2353 2354 static void 2355 untap_callout(void *arg) 2356 { 2357 struct uatp_softc *sc = arg; 2358 2359 mutex_enter(&sc->sc_tap_mutex); 2360 TAP_DEBUG_PRE(sc); 2361 switch (sc->sc_tap_state) { 2362 case TAP_STATE_TAPPED: 2363 tap_transition_initial(sc); 2364 /* 2365 * XXX Kludge: Call uatp_input after the state transition 2366 * to make sure that it will actually release the button. 2367 */ 2368 uatp_input(sc, 0, 0, 0, 0, 0); 2369 2370 case TAP_STATE_INITIAL: 2371 case TAP_STATE_TAPPING: 2372 case TAP_STATE_DOUBLE_TAPPING: 2373 case TAP_STATE_DRAGGING_UP: 2374 case TAP_STATE_DRAGGING_DOWN: 2375 case TAP_STATE_TAPPING_IN_DRAG: 2376 /* 2377 * Somebody else got in and changed the state before we 2378 * untapped. Let them take over; do nothing here. 2379 */ 2380 break; 2381 2382 default: 2383 aprint_error_dev(uatp_dev(sc), "%s: invalid tap state: %d\n", 2384 __func__, sc->sc_tap_state); 2385 tap_transition_initial(sc); 2386 /* XXX Just in case...? */ 2387 uatp_input(sc, 0, 0, 0, 0, 0); 2388 break; 2389 } 2390 TAP_DEBUG_POST(sc); 2391 mutex_exit(&sc->sc_tap_mutex); 2392 } 2393 2394 /* 2395 * Emulate different buttons if the user holds down n fingers while 2396 * pressing the physical button. (This is unrelated to tapping.) 2397 */ 2398 2399 static uint32_t 2400 emulated_buttons(struct uatp_softc *sc, unsigned int fingers) 2401 { 2402 CHECK((1 < fingers), return 0); 2403 2404 switch (fingers) { 2405 case 2: 2406 DPRINTF(sc, UATP_DEBUG_EMUL_BUTTON, 2407 ("2-finger emulated button: %"PRIx32"\n", 2408 sc->sc_knobs.two_finger_buttons)); 2409 return sc->sc_knobs.two_finger_buttons; 2410 2411 case 3: 2412 default: 2413 DPRINTF(sc, UATP_DEBUG_EMUL_BUTTON, 2414 ("3-finger emulated button: %"PRIx32"\n", 2415 sc->sc_knobs.three_finger_buttons)); 2416 return sc->sc_knobs.three_finger_buttons; 2417 } 2418 } 2419 2420 /* 2421 * Update the position known to the driver based on the position and 2422 * number of fingers. dx, dy, dz, and dw are expected to hold zero; 2423 * update_position may store nonzero changes in position in them. 2424 */ 2425 2426 static void 2427 update_position(struct uatp_softc *sc, unsigned int fingers, 2428 unsigned int x_raw, unsigned int y_raw, 2429 int *dx, int *dy, int *dz, int *dw) 2430 { 2431 CHECK((0 < fingers), return); 2432 2433 if ((fingers == 1) || (sc->sc_knobs.multifinger_track == 1)) 2434 move_mouse(sc, x_raw, y_raw, dx, dy); 2435 else if (sc->sc_knobs.multifinger_track == 2) 2436 scroll_wheel(sc, x_raw, y_raw, dz, dw); 2437 } 2438 2439 /* 2440 * XXX Scrolling needs to use a totally different motion model. 2441 */ 2442 2443 static void 2444 move_mouse(struct uatp_softc *sc, unsigned int x_raw, unsigned int y_raw, 2445 int *dx, int *dy) 2446 { 2447 move(sc, "mouse", x_raw, y_raw, &sc->sc_x_raw, &sc->sc_y_raw, 2448 &sc->sc_x_smoothed, &sc->sc_y_smoothed, 2449 &sc->sc_x_remainder, &sc->sc_y_remainder, 2450 dx, dy); 2451 } 2452 2453 static void 2454 scroll_wheel(struct uatp_softc *sc, unsigned int x_raw, unsigned int y_raw, 2455 int *dz, int *dw) 2456 { 2457 move(sc, "scroll", x_raw, y_raw, &sc->sc_z_raw, &sc->sc_w_raw, 2458 &sc->sc_z_smoothed, &sc->sc_w_smoothed, 2459 &sc->sc_z_remainder, &sc->sc_w_remainder, 2460 dz, dw); 2461 } 2462 2463 static void 2464 move(struct uatp_softc *sc, const char *ctx, unsigned int a, unsigned int b, 2465 int *a_raw, int *b_raw, 2466 int *a_smoothed, int *b_smoothed, 2467 unsigned int *a_remainder, unsigned int *b_remainder, 2468 int *da, int *db) 2469 { 2470 #define CHECK_(condition) CHECK(condition, return) 2471 2472 int old_a_raw = *a_raw, old_a_smoothed = *a_smoothed; 2473 int old_b_raw = *b_raw, old_b_smoothed = *b_smoothed; 2474 unsigned int a_dist, b_dist, dist_squared; 2475 bool a_fast, b_fast; 2476 2477 /* 2478 * Make sure the quadratics in motion_below_threshold and 2479 * tracking distance don't overflow int arithmetic. 2480 */ 2481 __CTASSERT(0x12000000 == (2 * UATP_MAX_POSITION * UATP_MAX_POSITION)); 2482 2483 CHECK_(a <= UATP_MAX_POSITION); 2484 CHECK_(b <= UATP_MAX_POSITION); 2485 *a_raw = a; 2486 *b_raw = b; 2487 if ((old_a_raw < 0) || (old_b_raw < 0)) { 2488 DPRINTF(sc, UATP_DEBUG_MOVE, 2489 ("initialize %s position (%d, %d) -> (%d, %d)\n", ctx, 2490 old_a_raw, old_b_raw, a, b)); 2491 return; 2492 } 2493 2494 if ((old_a_smoothed < 0) || (old_b_smoothed < 0)) { 2495 /* XXX Does this make sense? */ 2496 old_a_smoothed = old_a_raw; 2497 old_b_smoothed = old_b_raw; 2498 } 2499 2500 CHECK_(0 <= old_a_raw); 2501 CHECK_(0 <= old_b_raw); 2502 CHECK_(old_a_raw <= UATP_MAX_POSITION); 2503 CHECK_(old_b_raw <= UATP_MAX_POSITION); 2504 CHECK_(0 <= old_a_smoothed); 2505 CHECK_(0 <= old_b_smoothed); 2506 CHECK_(old_a_smoothed <= UATP_MAX_POSITION); 2507 CHECK_(old_b_smoothed <= UATP_MAX_POSITION); 2508 CHECK_(0 <= *a_raw); 2509 CHECK_(0 <= *b_raw); 2510 CHECK_(*a_raw <= UATP_MAX_POSITION); 2511 CHECK_(*b_raw <= UATP_MAX_POSITION); 2512 *a_smoothed = smooth(sc, old_a_raw, old_a_smoothed, *a_raw); 2513 *b_smoothed = smooth(sc, old_b_raw, old_b_smoothed, *b_raw); 2514 CHECK_(0 <= *a_smoothed); 2515 CHECK_(0 <= *b_smoothed); 2516 CHECK_(*a_smoothed <= UATP_MAX_POSITION); 2517 CHECK_(*b_smoothed <= UATP_MAX_POSITION); 2518 2519 if (sc->sc_motion_timer < sc->sc_knobs.motion_delay) { 2520 DPRINTF(sc, UATP_DEBUG_MOVE, ("delay motion %u\n", 2521 sc->sc_motion_timer)); 2522 sc->sc_motion_timer += 1; 2523 return; 2524 } 2525 2526 /* XXX Use raw distances or smoothed distances? Acceleration? */ 2527 if (*a_smoothed < old_a_smoothed) 2528 a_dist = old_a_smoothed - *a_smoothed; 2529 else 2530 a_dist = *a_smoothed - old_a_smoothed; 2531 2532 if (*b_smoothed < old_b_smoothed) 2533 b_dist = old_b_smoothed - *b_smoothed; 2534 else 2535 b_dist = *b_smoothed - old_b_smoothed; 2536 2537 dist_squared = (a_dist * a_dist) + (b_dist * b_dist); 2538 if (dist_squared < ((2 * UATP_MAX_POSITION * UATP_MAX_POSITION) 2539 - sc->sc_track_distance)) 2540 sc->sc_track_distance += dist_squared; 2541 else 2542 sc->sc_track_distance = (2 * UATP_MAX_POSITION * 2543 UATP_MAX_POSITION); 2544 DPRINTF(sc, UATP_DEBUG_TRACK_DIST, ("finger has tracked %u units^2\n", 2545 sc->sc_track_distance)); 2546 2547 /* 2548 * The checks above guarantee that the differences here are at 2549 * most UATP_MAX_POSITION in magnitude, since both minuend and 2550 * subtrahend are nonnegative and at most UATP_MAX_POSITION. 2551 */ 2552 if (motion_below_threshold(sc, sc->sc_knobs.motion_threshold, 2553 (int)(*a_smoothed - old_a_smoothed), 2554 (int)(*b_smoothed - old_b_smoothed))) { 2555 DPRINTF(sc, UATP_DEBUG_MOVE, 2556 ("%s motion too small: (%d, %d) -> (%d, %d)\n", ctx, 2557 old_a_smoothed, old_b_smoothed, 2558 *a_smoothed, *b_smoothed)); 2559 return; 2560 } 2561 if (sc->sc_knobs.fast_per_direction == 0) { 2562 a_fast = b_fast = !motion_below_threshold(sc, 2563 sc->sc_knobs.fast_motion_threshold, 2564 (int)(*a_smoothed - old_a_smoothed), 2565 (int)(*b_smoothed - old_b_smoothed)); 2566 } else { 2567 a_fast = !motion_below_threshold(sc, 2568 sc->sc_knobs.fast_motion_threshold, 2569 (int)(*a_smoothed - old_a_smoothed), 2570 0); 2571 b_fast = !motion_below_threshold(sc, 2572 sc->sc_knobs.fast_motion_threshold, 2573 0, 2574 (int)(*b_smoothed - old_b_smoothed)); 2575 } 2576 *da = accelerate(sc, old_a_raw, *a_raw, old_a_smoothed, *a_smoothed, 2577 a_fast, a_remainder); 2578 *db = accelerate(sc, old_b_raw, *b_raw, old_b_smoothed, *b_smoothed, 2579 b_fast, b_remainder); 2580 DPRINTF(sc, UATP_DEBUG_MOVE, 2581 ("update %s position (%d, %d) -> (%d, %d), move by (%d, %d)\n", 2582 ctx, old_a_smoothed, old_b_smoothed, *a_smoothed, *b_smoothed, 2583 *da, *db)); 2584 2585 #undef CHECK_ 2586 } 2587 2588 static int 2589 smooth(struct uatp_softc *sc, unsigned int old_raw, unsigned int old_smoothed, 2590 unsigned int raw) 2591 { 2592 #define CHECK_(condition) CHECK(condition, return old_raw) 2593 2594 /* 2595 * Arithmetic bounds: 2596 * . the weights are at most UATP_MAX_WEIGHT; 2597 * . the positions are at most UATP_MAX_POSITION; and so 2598 * . the numerator of the average is at most 2599 * 3 * UATP_MAX_WEIGHT * UATP_MAX_POSITION, 2600 * which is #x477000, fitting comfortably in an int. 2601 */ 2602 __CTASSERT(0x477000 == (3 * UATP_MAX_WEIGHT * UATP_MAX_POSITION)); 2603 unsigned int old_raw_weight = uatp_old_raw_weight(sc); 2604 unsigned int old_smoothed_weight = uatp_old_smoothed_weight(sc); 2605 unsigned int new_raw_weight = uatp_new_raw_weight(sc); 2606 CHECK_(old_raw_weight <= UATP_MAX_WEIGHT); 2607 CHECK_(old_smoothed_weight <= UATP_MAX_WEIGHT); 2608 CHECK_(new_raw_weight <= UATP_MAX_WEIGHT); 2609 CHECK_(old_raw <= UATP_MAX_POSITION); 2610 CHECK_(old_smoothed <= UATP_MAX_POSITION); 2611 CHECK_(raw <= UATP_MAX_POSITION); 2612 return (((old_raw_weight * old_raw) + 2613 (old_smoothed_weight * old_smoothed) + 2614 (new_raw_weight * raw)) 2615 / (old_raw_weight + old_smoothed_weight + new_raw_weight)); 2616 2617 #undef CHECK_ 2618 } 2619 2620 static bool 2621 motion_below_threshold(struct uatp_softc *sc, unsigned int threshold, 2622 int x, int y) 2623 { 2624 unsigned int x_squared, y_squared; 2625 2626 /* Caller guarantees the multiplication will not overflow. */ 2627 KASSERT(-UATP_MAX_POSITION <= x); 2628 KASSERT(-UATP_MAX_POSITION <= y); 2629 KASSERT(x <= UATP_MAX_POSITION); 2630 KASSERT(y <= UATP_MAX_POSITION); 2631 __CTASSERT(0x12000000 == (2 * UATP_MAX_POSITION * UATP_MAX_POSITION)); 2632 2633 x_squared = (x * x); 2634 y_squared = (y * y); 2635 2636 return (x_squared + y_squared) < threshold; 2637 } 2638 2639 static int 2640 accelerate(struct uatp_softc *sc, unsigned int old_raw, unsigned int raw, 2641 unsigned int old_smoothed, unsigned int smoothed, bool fast, 2642 int *remainder) 2643 { 2644 #define CHECK_(condition) CHECK(condition, return 0) 2645 2646 /* Guarantee that the scaling won't overflow. */ 2647 __CTASSERT(0x30000 == 2648 (UATP_MAX_POSITION * UATP_MAX_MOTION_MULTIPLIER)); 2649 2650 CHECK_(old_raw <= UATP_MAX_POSITION); 2651 CHECK_(raw <= UATP_MAX_POSITION); 2652 CHECK_(old_smoothed <= UATP_MAX_POSITION); 2653 CHECK_(smoothed <= UATP_MAX_POSITION); 2654 2655 return (fast ? uatp_scale_fast_motion : uatp_scale_motion) 2656 (sc, (((int) smoothed) - ((int) old_smoothed)), remainder); 2657 2658 #undef CHECK_ 2659 } 2660 2661 MODULE(MODULE_CLASS_DRIVER, uatp, NULL); 2662 2663 #ifdef _MODULE 2664 #include "ioconf.c" 2665 #endif 2666 2667 static int 2668 uatp_modcmd(modcmd_t cmd, void *aux) 2669 { 2670 int error = 0; 2671 2672 switch (cmd) { 2673 case MODULE_CMD_INIT: 2674 #ifdef _MODULE 2675 error = config_init_component(cfdriver_ioconf_uatp, 2676 cfattach_ioconf_uatp, cfdata_ioconf_uatp); 2677 #endif 2678 return error; 2679 case MODULE_CMD_FINI: 2680 #ifdef _MODULE 2681 error = config_fini_component(cfdriver_ioconf_uatp, 2682 cfattach_ioconf_uatp, cfdata_ioconf_uatp); 2683 #endif 2684 return error; 2685 default: 2686 return ENOTTY; 2687 } 2688 } 2689
Indexes created Thu Sep 25 16:09:42 GMT 2025