Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/hid/hmt.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2014-2020 Vladimir Kondratyev <wulf@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * MS Windows 7/8/10 compatible HID Multi-touch Device driver. 33 * https://msdn.microsoft.com/en-us/library/windows/hardware/jj151569(v=vs.85).aspx 34 * http://download.microsoft.com/download/7/d/d/7dd44bb7-2a7a-4505-ac1c-7227d3d96d5b/hid-over-i2c-protocol-spec-v1-0.docx 35 * https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt 36 */ 37 38 #include "opt_hid.h" 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/kernel.h> 43 #include <sys/lock.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/mutex.h> 47 #include <sys/sysctl.h> 48 #include <sys/systm.h> 49 50 #include <dev/evdev/evdev.h> 51 #include <dev/evdev/input.h> 52 53 #define HID_DEBUG_VAR hmt_debug 54 #include <dev/hid/hid.h> 55 #include <dev/hid/hidbus.h> 56 #include <dev/hid/hidquirk.h> 57 58 #include <dev/hid/hconf.h> 59 60 static SYSCTL_NODE(_hw_hid, OID_AUTO, hmt, CTLFLAG_RW, 0, 61 "MSWindows 7/8/10 compatible HID Multi-touch Device"); 62 #ifdef HID_DEBUG 63 static int hmt_debug = 0; 64 SYSCTL_INT(_hw_hid_hmt, OID_AUTO, debug, CTLFLAG_RWTUN, 65 &hmt_debug, 1, "Debug level"); 66 #endif 67 static bool hmt_timestamps = 0; 68 SYSCTL_BOOL(_hw_hid_hmt, OID_AUTO, timestamps, CTLFLAG_RDTUN, 69 &hmt_timestamps, 1, "Enable hardware timestamp reporting"); 70 71 #define HMT_BTN_MAX 8 /* Number of buttons supported */ 72 73 enum hmt_type { 74 HMT_TYPE_UNKNOWN = 0, /* HID report descriptor is not probed */ 75 HMT_TYPE_UNSUPPORTED, /* Repdescr does not belong to MT device */ 76 HMT_TYPE_TOUCHPAD, 77 HMT_TYPE_TOUCHSCREEN, 78 }; 79 80 enum { 81 HMT_TIP_SWITCH, 82 #define HMT_SLOT HMT_TIP_SWITCH 83 HMT_WIDTH, 84 #define HMT_MAJOR HMT_WIDTH 85 HMT_HEIGHT, 86 #define HMT_MINOR HMT_HEIGHT 87 HMT_ORIENTATION, 88 HMT_X, 89 HMT_Y, 90 HMT_CONTACTID, 91 HMT_PRESSURE, 92 HMT_IN_RANGE, 93 HMT_CONFIDENCE, 94 HMT_TOOL_X, 95 HMT_TOOL_Y, 96 HMT_N_USAGES, 97 }; 98 99 #define HMT_NO_CODE (ABS_MAX + 10) 100 #define HMT_NO_USAGE -1 101 102 struct hmt_hid_map_item { 103 char name[5]; 104 int32_t usage; /* HID usage */ 105 uint32_t code; /* Evdev event code */ 106 bool required; /* Required for MT Digitizers */ 107 }; 108 109 static const struct hmt_hid_map_item hmt_hid_map[HMT_N_USAGES] = { 110 [HMT_TIP_SWITCH] = { /* HMT_SLOT */ 111 .name = "TIP", 112 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_TIP_SWITCH), 113 .code = ABS_MT_SLOT, 114 .required = true, 115 }, 116 [HMT_WIDTH] = { /* HMT_MAJOR */ 117 .name = "WDTH", 118 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_WIDTH), 119 .code = ABS_MT_TOUCH_MAJOR, 120 .required = false, 121 }, 122 [HMT_HEIGHT] = { /* HMT_MINOR */ 123 .name = "HGHT", 124 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_HEIGHT), 125 .code = ABS_MT_TOUCH_MINOR, 126 .required = false, 127 }, 128 [HMT_ORIENTATION] = { 129 .name = "ORIE", 130 .usage = HMT_NO_USAGE, 131 .code = ABS_MT_ORIENTATION, 132 .required = false, 133 }, 134 [HMT_X] = { 135 .name = "X", 136 .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X), 137 .code = ABS_MT_POSITION_X, 138 .required = true, 139 }, 140 [HMT_Y] = { 141 .name = "Y", 142 .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y), 143 .code = ABS_MT_POSITION_Y, 144 .required = true, 145 }, 146 [HMT_CONTACTID] = { 147 .name = "C_ID", 148 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACTID), 149 .code = ABS_MT_TRACKING_ID, 150 .required = true, 151 }, 152 [HMT_PRESSURE] = { 153 .name = "PRES", 154 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_TIP_PRESSURE), 155 .code = ABS_MT_PRESSURE, 156 .required = false, 157 }, 158 [HMT_IN_RANGE] = { 159 .name = "RANG", 160 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_IN_RANGE), 161 .code = ABS_MT_DISTANCE, 162 .required = false, 163 }, 164 [HMT_CONFIDENCE] = { 165 .name = "CONF", 166 .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_CONFIDENCE), 167 .code = HMT_NO_CODE, 168 .required = false, 169 }, 170 [HMT_TOOL_X] = { /* Shares HID usage with HMT_X */ 171 .name = "TL_X", 172 .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X), 173 .code = ABS_MT_TOOL_X, 174 .required = false, 175 }, 176 [HMT_TOOL_Y] = { /* Shares HID usage with HMT_Y */ 177 .name = "TL_Y", 178 .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y), 179 .code = ABS_MT_TOOL_Y, 180 .required = false, 181 }, 182 }; 183 184 struct hmt_softc { 185 device_t dev; 186 enum hmt_type type; 187 188 struct hid_absinfo ai[HMT_N_USAGES]; 189 struct hid_location locs[MAX_MT_SLOTS][HMT_N_USAGES]; 190 struct hid_location cont_count_loc; 191 struct hid_location btn_loc[HMT_BTN_MAX]; 192 struct hid_location int_btn_loc; 193 struct hid_location scan_time_loc; 194 int32_t scan_time_max; 195 int32_t scan_time; 196 int32_t timestamp; 197 bool touch; 198 bool prev_touch; 199 200 struct evdev_dev *evdev; 201 202 uint32_t slot_data[HMT_N_USAGES]; 203 uint8_t caps[howmany(HMT_N_USAGES, 8)]; 204 uint8_t buttons[howmany(HMT_BTN_MAX, 8)]; 205 uint32_t nconts_per_report; 206 uint32_t nconts_todo; 207 uint8_t report_id; 208 uint32_t max_button; 209 bool has_int_button; 210 bool is_clickpad; 211 bool do_timestamps; 212 #ifdef IICHID_SAMPLING 213 bool iichid_sampling; 214 #endif 215 216 struct hid_location cont_max_loc; 217 uint32_t cont_max_rlen; 218 uint8_t cont_max_rid; 219 struct hid_location btn_type_loc; 220 uint32_t btn_type_rlen; 221 uint8_t btn_type_rid; 222 uint32_t thqa_cert_rlen; 223 uint8_t thqa_cert_rid; 224 }; 225 226 #define HMT_FOREACH_USAGE(caps, usage) \ 227 for ((usage) = 0; (usage) < HMT_N_USAGES; ++(usage)) \ 228 if (isset((caps), (usage))) 229 230 static enum hmt_type hmt_hid_parse(struct hmt_softc *, const void *, 231 hid_size_t, uint32_t, uint8_t); 232 static int hmt_set_input_mode(struct hmt_softc *, enum hconf_input_mode); 233 234 static hid_intr_t hmt_intr; 235 236 static device_probe_t hmt_probe; 237 static device_attach_t hmt_attach; 238 static device_detach_t hmt_detach; 239 240 static evdev_open_t hmt_ev_open; 241 static evdev_close_t hmt_ev_close; 242 243 static const struct evdev_methods hmt_evdev_methods = { 244 .ev_open = &hmt_ev_open, 245 .ev_close = &hmt_ev_close, 246 }; 247 248 static const struct hid_device_id hmt_devs[] = { 249 { HID_TLC(HUP_DIGITIZERS, HUD_TOUCHSCREEN) }, 250 { HID_TLC(HUP_DIGITIZERS, HUD_TOUCHPAD) }, 251 }; 252 253 static int 254 hmt_ev_close(struct evdev_dev *evdev) 255 { 256 return (hidbus_intr_stop(evdev_get_softc(evdev))); 257 } 258 259 static int 260 hmt_ev_open(struct evdev_dev *evdev) 261 { 262 return (hidbus_intr_start(evdev_get_softc(evdev))); 263 } 264 265 static int 266 hmt_probe(device_t dev) 267 { 268 struct hmt_softc *sc = device_get_softc(dev); 269 void *d_ptr; 270 hid_size_t d_len; 271 int err; 272 273 err = HIDBUS_LOOKUP_DRIVER_INFO(dev, hmt_devs); 274 if (err != 0) 275 return (err); 276 277 err = hid_get_report_descr(dev, &d_ptr, &d_len); 278 if (err != 0) { 279 device_printf(dev, "could not retrieve report descriptor from " 280 "device: %d\n", err); 281 return (ENXIO); 282 } 283 284 /* Check if report descriptor belongs to a HID multitouch device */ 285 if (sc->type == HMT_TYPE_UNKNOWN) 286 sc->type = hmt_hid_parse(sc, d_ptr, d_len, 287 hidbus_get_usage(dev), hidbus_get_index(dev)); 288 if (sc->type == HMT_TYPE_UNSUPPORTED) 289 return (ENXIO); 290 291 hidbus_set_desc(dev, 292 sc->type == HMT_TYPE_TOUCHPAD ? "TouchPad" : "TouchScreen"); 293 294 return (BUS_PROBE_DEFAULT); 295 } 296 297 static int 298 hmt_attach(device_t dev) 299 { 300 struct hmt_softc *sc = device_get_softc(dev); 301 const struct hid_device_info *hw = hid_get_device_info(dev); 302 void *d_ptr; 303 uint8_t *fbuf = NULL; 304 hid_size_t d_len, fsize; 305 uint32_t cont_count_max; 306 int nbuttons, btn; 307 size_t i; 308 int err; 309 310 err = hid_get_report_descr(dev, &d_ptr, &d_len); 311 if (err != 0) { 312 device_printf(dev, "could not retrieve report descriptor from " 313 "device: %d\n", err); 314 return (ENXIO); 315 } 316 317 sc->dev = dev; 318 319 fsize = hid_report_size_max(d_ptr, d_len, hid_feature, NULL); 320 if (fsize != 0) 321 fbuf = malloc(fsize, M_TEMP, M_WAITOK | M_ZERO); 322 323 /* Fetch and parse "Contact count maximum" feature report */ 324 if (sc->cont_max_rlen > 1) { 325 err = hid_get_report(dev, fbuf, sc->cont_max_rlen, NULL, 326 HID_FEATURE_REPORT, sc->cont_max_rid); 327 if (err == 0) { 328 cont_count_max = hid_get_udata(fbuf + 1, 329 sc->cont_max_rlen - 1, &sc->cont_max_loc); 330 /* 331 * Feature report is a primary source of 332 * 'Contact Count Maximum' 333 */ 334 if (cont_count_max > 0) 335 sc->ai[HMT_SLOT].max = cont_count_max - 1; 336 } else 337 DPRINTF("hid_get_report error=%d\n", err); 338 } else 339 DPRINTF("Feature report %hhu size invalid: %u\n", 340 sc->cont_max_rid, sc->cont_max_rlen); 341 342 /* Fetch and parse "Button type" feature report */ 343 if (sc->btn_type_rlen > 1 && sc->btn_type_rid != sc->cont_max_rid) { 344 bzero(fbuf, fsize); 345 err = hid_get_report(dev, fbuf, sc->btn_type_rlen, NULL, 346 HID_FEATURE_REPORT, sc->btn_type_rid); 347 } 348 if (sc->btn_type_rlen > 1) { 349 if (err == 0) 350 sc->is_clickpad = hid_get_udata(fbuf + 1, 351 sc->btn_type_rlen - 1, &sc->btn_type_loc) == 0; 352 else 353 DPRINTF("hid_get_report error=%d\n", err); 354 } 355 356 /* Fetch THQA certificate to enable some devices like WaveShare */ 357 if (sc->thqa_cert_rlen > 1 && sc->thqa_cert_rid != sc->cont_max_rid) 358 (void)hid_get_report(dev, fbuf, sc->thqa_cert_rlen, NULL, 359 HID_FEATURE_REPORT, sc->thqa_cert_rid); 360 361 free(fbuf, M_TEMP); 362 363 /* Switch touchpad in to absolute multitouch mode */ 364 if (sc->type == HMT_TYPE_TOUCHPAD) { 365 err = hmt_set_input_mode(sc, HCONF_INPUT_MODE_MT_TOUCHPAD); 366 if (err != 0) 367 DPRINTF("Failed to set input mode: %d\n", err); 368 } 369 370 /* Cap contact count maximum to MAX_MT_SLOTS */ 371 if (sc->ai[HMT_SLOT].max >= MAX_MT_SLOTS) { 372 DPRINTF("Hardware reported %d contacts while only %d is " 373 "supported\n", (int)sc->ai[HMT_SLOT].max+1, MAX_MT_SLOTS); 374 sc->ai[HMT_SLOT].max = MAX_MT_SLOTS - 1; 375 } 376 377 if (hid_test_quirk(hw, HQ_MT_TIMESTAMP) || hmt_timestamps) 378 sc->do_timestamps = true; 379 #ifdef IICHID_SAMPLING 380 if (hid_test_quirk(hw, HQ_IICHID_SAMPLING)) 381 sc->iichid_sampling = true; 382 #endif 383 384 hidbus_set_intr(dev, hmt_intr, sc); 385 386 sc->evdev = evdev_alloc(); 387 evdev_set_name(sc->evdev, device_get_desc(dev)); 388 evdev_set_phys(sc->evdev, device_get_nameunit(dev)); 389 evdev_set_id(sc->evdev, hw->idBus, hw->idVendor, hw->idProduct, 390 hw->idVersion); 391 evdev_set_serial(sc->evdev, hw->serial); 392 evdev_set_methods(sc->evdev, dev, &hmt_evdev_methods); 393 evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_STCOMPAT); 394 evdev_set_flag(sc->evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */ 395 switch (sc->type) { 396 case HMT_TYPE_TOUCHSCREEN: 397 evdev_support_prop(sc->evdev, INPUT_PROP_DIRECT); 398 break; 399 case HMT_TYPE_TOUCHPAD: 400 evdev_support_prop(sc->evdev, INPUT_PROP_POINTER); 401 if (sc->is_clickpad) 402 evdev_support_prop(sc->evdev, INPUT_PROP_BUTTONPAD); 403 break; 404 default: 405 KASSERT(0, ("hmt_attach: unsupported touch device type")); 406 } 407 evdev_support_event(sc->evdev, EV_SYN); 408 evdev_support_event(sc->evdev, EV_ABS); 409 if (sc->do_timestamps) { 410 evdev_support_event(sc->evdev, EV_MSC); 411 evdev_support_msc(sc->evdev, MSC_TIMESTAMP); 412 } 413 #ifdef IICHID_SAMPLING 414 if (sc->iichid_sampling) 415 evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_AUTOREL); 416 #endif 417 nbuttons = 0; 418 if (sc->max_button != 0 || sc->has_int_button) { 419 evdev_support_event(sc->evdev, EV_KEY); 420 if (sc->has_int_button) 421 evdev_support_key(sc->evdev, BTN_LEFT); 422 for (btn = 0; btn < sc->max_button; ++btn) { 423 if (isset(sc->buttons, btn)) { 424 evdev_support_key(sc->evdev, BTN_MOUSE + btn); 425 nbuttons++; 426 } 427 } 428 } 429 HMT_FOREACH_USAGE(sc->caps, i) { 430 if (hmt_hid_map[i].code != HMT_NO_CODE) 431 evdev_support_abs(sc->evdev, hmt_hid_map[i].code, 432 sc->ai[i].min, sc->ai[i].max, 0, 0, sc->ai[i].res); 433 } 434 435 err = evdev_register(sc->evdev); 436 if (err) { 437 hmt_detach(dev); 438 return (ENXIO); 439 } 440 441 /* Announce information about the touch device */ 442 device_printf(sc->dev, "Multitouch %s with %d external button%s%s\n", 443 sc->type == HMT_TYPE_TOUCHSCREEN ? "touchscreen" : "touchpad", 444 nbuttons, nbuttons != 1 ? "s" : "", 445 sc->is_clickpad ? ", click-pad" : ""); 446 device_printf(sc->dev, 447 "%d contacts with [%s%s%s%s%s] properties. Report range [%d:%d] - [%d:%d]\n", 448 (int)sc->ai[HMT_SLOT].max + 1, 449 isset(sc->caps, HMT_IN_RANGE) ? "R" : "", 450 isset(sc->caps, HMT_CONFIDENCE) ? "C" : "", 451 isset(sc->caps, HMT_WIDTH) ? "W" : "", 452 isset(sc->caps, HMT_HEIGHT) ? "H" : "", 453 isset(sc->caps, HMT_PRESSURE) ? "P" : "", 454 (int)sc->ai[HMT_X].min, (int)sc->ai[HMT_Y].min, 455 (int)sc->ai[HMT_X].max, (int)sc->ai[HMT_Y].max); 456 457 return (0); 458 } 459 460 static int 461 hmt_detach(device_t dev) 462 { 463 struct hmt_softc *sc = device_get_softc(dev); 464 465 evdev_free(sc->evdev); 466 467 return (0); 468 } 469 470 static void 471 hmt_intr(void *context, void *buf, hid_size_t len) 472 { 473 struct hmt_softc *sc = context; 474 size_t usage; 475 uint32_t *slot_data = sc->slot_data; 476 uint32_t cont, btn; 477 uint32_t cont_count; 478 uint32_t width; 479 uint32_t height; 480 uint32_t int_btn = 0; 481 uint32_t left_btn = 0; 482 int32_t slot; 483 uint32_t scan_time; 484 int32_t delta; 485 uint8_t id; 486 487 #ifdef IICHID_SAMPLING 488 /* 489 * Special packet of zero length is generated by iichid driver running 490 * in polling mode at the start of inactivity period to workaround 491 * "stuck touch" problem caused by miss of finger release events. 492 * This snippet is to be removed after GPIO interrupt support is added. 493 */ 494 if (sc->iichid_sampling && len == 0) { 495 sc->prev_touch = false; 496 sc->timestamp = 0; 497 for (slot = 0; slot <= sc->ai[HMT_SLOT].max; slot++) { 498 evdev_push_abs(sc->evdev, ABS_MT_SLOT, slot); 499 evdev_push_abs(sc->evdev, ABS_MT_TRACKING_ID, -1); 500 } 501 evdev_sync(sc->evdev); 502 return; 503 } 504 #endif 505 506 /* Ignore irrelevant reports */ 507 id = sc->report_id != 0 ? *(uint8_t *)buf : 0; 508 if (sc->report_id != id) { 509 DPRINTF("Skip report with unexpected ID: %hhu\n", id); 510 return; 511 } 512 513 /* Strip leading "report ID" byte */ 514 if (sc->report_id != 0) { 515 len--; 516 buf = (uint8_t *)buf + 1; 517 } 518 519 /* 520 * "In Parallel mode, devices report all contact information in a 521 * single packet. Each physical contact is represented by a logical 522 * collection that is embedded in the top-level collection." 523 * 524 * Since additional contacts that were not present will still be in the 525 * report with contactid=0 but contactids are zero-based, find 526 * contactcount first. 527 */ 528 cont_count = hid_get_udata(buf, len, &sc->cont_count_loc); 529 /* 530 * "In Hybrid mode, the number of contacts that can be reported in one 531 * report is less than the maximum number of contacts that the device 532 * supports. For example, a device that supports a maximum of 533 * 4 concurrent physical contacts, can set up its top-level collection 534 * to deliver a maximum of two contacts in one report. If four contact 535 * points are present, the device can break these up into two serial 536 * reports that deliver two contacts each. 537 * 538 * "When a device delivers data in this manner, the Contact Count usage 539 * value in the first report should reflect the total number of 540 * contacts that are being delivered in the hybrid reports. The other 541 * serial reports should have a contact count of zero (0)." 542 */ 543 if (cont_count != 0) 544 sc->nconts_todo = cont_count; 545 546 #ifdef HID_DEBUG 547 DPRINTFN(6, "cont_count:%2u", (unsigned)cont_count); 548 if (hmt_debug >= 6) { 549 HMT_FOREACH_USAGE(sc->caps, usage) { 550 if (hmt_hid_map[usage].usage != HMT_NO_USAGE) 551 printf(" %-4s", hmt_hid_map[usage].name); 552 } 553 printf("\n"); 554 } 555 #endif 556 557 /* Find the number of contacts reported in current report */ 558 cont_count = MIN(sc->nconts_todo, sc->nconts_per_report); 559 560 /* Use protocol Type B for reporting events */ 561 for (cont = 0; cont < cont_count; cont++) { 562 bzero(slot_data, sizeof(sc->slot_data)); 563 HMT_FOREACH_USAGE(sc->caps, usage) { 564 if (sc->locs[cont][usage].size > 0) 565 slot_data[usage] = hid_get_udata( 566 buf, len, &sc->locs[cont][usage]); 567 } 568 569 slot = evdev_get_mt_slot_by_tracking_id(sc->evdev, 570 slot_data[HMT_CONTACTID]); 571 572 #ifdef HID_DEBUG 573 DPRINTFN(6, "cont%01x: data = ", cont); 574 if (hmt_debug >= 6) { 575 HMT_FOREACH_USAGE(sc->caps, usage) { 576 if (hmt_hid_map[usage].usage != HMT_NO_USAGE) 577 printf("%04x ", slot_data[usage]); 578 } 579 printf("slot = %d\n", (int)slot); 580 } 581 #endif 582 583 if (slot == -1) { 584 DPRINTF("Slot overflow for contact_id %u\n", 585 (unsigned)slot_data[HMT_CONTACTID]); 586 continue; 587 } 588 589 if (slot_data[HMT_TIP_SWITCH] != 0 && 590 !(isset(sc->caps, HMT_CONFIDENCE) && 591 slot_data[HMT_CONFIDENCE] == 0)) { 592 /* This finger is in proximity of the sensor */ 593 sc->touch = true; 594 slot_data[HMT_SLOT] = slot; 595 slot_data[HMT_IN_RANGE] = !slot_data[HMT_IN_RANGE]; 596 /* Divided by two to match visual scale of touch */ 597 width = slot_data[HMT_WIDTH] >> 1; 598 height = slot_data[HMT_HEIGHT] >> 1; 599 slot_data[HMT_ORIENTATION] = width > height; 600 slot_data[HMT_MAJOR] = MAX(width, height); 601 slot_data[HMT_MINOR] = MIN(width, height); 602 603 HMT_FOREACH_USAGE(sc->caps, usage) 604 if (hmt_hid_map[usage].code != HMT_NO_CODE) 605 evdev_push_abs(sc->evdev, 606 hmt_hid_map[usage].code, 607 slot_data[usage]); 608 } else { 609 evdev_push_abs(sc->evdev, ABS_MT_SLOT, slot); 610 evdev_push_abs(sc->evdev, ABS_MT_TRACKING_ID, -1); 611 } 612 } 613 614 sc->nconts_todo -= cont_count; 615 if (sc->do_timestamps && sc->nconts_todo == 0) { 616 /* HUD_SCAN_TIME is measured in 100us, convert to us. */ 617 scan_time = hid_get_udata(buf, len, &sc->scan_time_loc); 618 if (sc->prev_touch) { 619 delta = scan_time - sc->scan_time; 620 if (delta < 0) 621 delta += sc->scan_time_max; 622 } else 623 delta = 0; 624 sc->scan_time = scan_time; 625 sc->timestamp += delta * 100; 626 evdev_push_msc(sc->evdev, MSC_TIMESTAMP, sc->timestamp); 627 sc->prev_touch = sc->touch; 628 sc->touch = false; 629 if (!sc->prev_touch) 630 sc->timestamp = 0; 631 } 632 if (sc->nconts_todo == 0) { 633 /* Report both the click and external left btns as BTN_LEFT */ 634 if (sc->has_int_button) 635 int_btn = hid_get_data(buf, len, &sc->int_btn_loc); 636 if (isset(sc->buttons, 0)) 637 left_btn = hid_get_data(buf, len, &sc->btn_loc[0]); 638 if (sc->has_int_button || isset(sc->buttons, 0)) 639 evdev_push_key(sc->evdev, BTN_LEFT, 640 (int_btn != 0) | (left_btn != 0)); 641 for (btn = 1; btn < sc->max_button; ++btn) { 642 if (isset(sc->buttons, btn)) 643 evdev_push_key(sc->evdev, BTN_MOUSE + btn, 644 hid_get_data(buf, 645 len, 646 &sc->btn_loc[btn]) != 0); 647 } 648 evdev_sync(sc->evdev); 649 } 650 } 651 652 static enum hmt_type 653 hmt_hid_parse(struct hmt_softc *sc, const void *d_ptr, hid_size_t d_len, 654 uint32_t tlc_usage, uint8_t tlc_index) 655 { 656 struct hid_absinfo ai; 657 struct hid_item hi; 658 struct hid_data *hd; 659 uint32_t flags; 660 size_t i; 661 size_t cont = 0; 662 enum hmt_type type; 663 uint32_t left_btn, btn; 664 int32_t cont_count_max = 0; 665 uint8_t report_id = 0; 666 bool finger_coll = false; 667 bool cont_count_found = false; 668 bool scan_time_found = false; 669 bool has_int_button = false; 670 671 #define HMT_HI_ABSOLUTE(hi) \ 672 (((hi).flags & (HIO_CONST|HIO_VARIABLE|HIO_RELATIVE)) == HIO_VARIABLE) 673 #define HUMS_THQA_CERT 0xC5 674 675 /* 676 * Get left button usage taking in account MS Precision Touchpad specs. 677 * For Windows PTP report descriptor assigns buttons in following way: 678 * Button 1 - Indicates Button State for touchpad button integrated 679 * with digitizer. 680 * Button 2 - Indicates Button State for external button for primary 681 * (default left) clicking. 682 * Button 3 - Indicates Button State for external button for secondary 683 * (default right) clicking. 684 * If a device only supports external buttons, it must still use 685 * Button 2 and Button 3 to reference the external buttons. 686 */ 687 switch (tlc_usage) { 688 case HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHSCREEN): 689 type = HMT_TYPE_TOUCHSCREEN; 690 left_btn = 1; 691 break; 692 case HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD): 693 type = HMT_TYPE_TOUCHPAD; 694 left_btn = 2; 695 break; 696 default: 697 return (HMT_TYPE_UNSUPPORTED); 698 } 699 700 /* Parse features for mandatory maximum contact count usage */ 701 if (!hidbus_locate(d_ptr, d_len, 702 HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACT_MAX), hid_feature, 703 tlc_index, 0, &sc->cont_max_loc, &flags, &sc->cont_max_rid, &ai) || 704 (flags & (HIO_VARIABLE | HIO_RELATIVE)) != HIO_VARIABLE) 705 return (HMT_TYPE_UNSUPPORTED); 706 707 cont_count_max = ai.max; 708 709 /* Parse features for button type usage */ 710 if (hidbus_locate(d_ptr, d_len, 711 HID_USAGE2(HUP_DIGITIZERS, HUD_BUTTON_TYPE), hid_feature, 712 tlc_index, 0, &sc->btn_type_loc, &flags, &sc->btn_type_rid, NULL) 713 && (flags & (HIO_VARIABLE | HIO_RELATIVE)) != HIO_VARIABLE) 714 sc->btn_type_rid = 0; 715 716 /* Parse features for THQA certificate report ID */ 717 hidbus_locate(d_ptr, d_len, HID_USAGE2(HUP_MICROSOFT, HUMS_THQA_CERT), 718 hid_feature, tlc_index, 0, NULL, NULL, &sc->thqa_cert_rid, NULL); 719 720 /* Parse input for other parameters */ 721 hd = hid_start_parse(d_ptr, d_len, 1 << hid_input); 722 HIDBUS_FOREACH_ITEM(hd, &hi, tlc_index) { 723 switch (hi.kind) { 724 case hid_collection: 725 if (hi.collevel == 2 && 726 hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_FINGER)) 727 finger_coll = true; 728 break; 729 case hid_endcollection: 730 if (hi.collevel == 1 && finger_coll) { 731 finger_coll = false; 732 cont++; 733 } 734 break; 735 case hid_input: 736 /* 737 * Ensure that all usages belong to the same report 738 */ 739 if (HMT_HI_ABSOLUTE(hi) && 740 (report_id == 0 || report_id == hi.report_ID)) 741 report_id = hi.report_ID; 742 else 743 break; 744 745 if (hi.collevel == 1 && left_btn == 2 && 746 hi.usage == HID_USAGE2(HUP_BUTTON, 1)) { 747 has_int_button = true; 748 sc->int_btn_loc = hi.loc; 749 break; 750 } 751 if (hi.collevel == 1 && 752 hi.usage >= HID_USAGE2(HUP_BUTTON, left_btn) && 753 hi.usage <= HID_USAGE2(HUP_BUTTON, HMT_BTN_MAX)) { 754 btn = (hi.usage & 0xFFFF) - left_btn; 755 setbit(sc->buttons, btn); 756 sc->btn_loc[btn] = hi.loc; 757 if (btn >= sc->max_button) 758 sc->max_button = btn + 1; 759 break; 760 } 761 if (hi.collevel == 1 && hi.usage == 762 HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACTCOUNT)) { 763 cont_count_found = true; 764 sc->cont_count_loc = hi.loc; 765 break; 766 } 767 /* Scan time is required but clobbered by evdev */ 768 if (hi.collevel == 1 && hi.usage == 769 HID_USAGE2(HUP_DIGITIZERS, HUD_SCAN_TIME)) { 770 scan_time_found = true; 771 sc->scan_time_loc = hi.loc; 772 sc->scan_time_max = hi.logical_maximum; 773 break; 774 } 775 776 if (!finger_coll || hi.collevel != 2) 777 break; 778 if (cont >= MAX_MT_SLOTS) { 779 DPRINTF("Finger %zu ignored\n", cont); 780 break; 781 } 782 783 for (i = 0; i < HMT_N_USAGES; i++) { 784 if (hi.usage == hmt_hid_map[i].usage) { 785 /* 786 * HUG_X usage is an array mapped to 787 * both ABS_MT_POSITION and ABS_MT_TOOL 788 * events. So don`t stop search if we 789 * already have HUG_X mapping done. 790 */ 791 if (sc->locs[cont][i].size) 792 continue; 793 sc->locs[cont][i] = hi.loc; 794 /* 795 * Hid parser returns valid logical and 796 * physical sizes for first finger only 797 * at least on ElanTS 0x04f3:0x0012. 798 */ 799 if (cont > 0) 800 break; 801 setbit(sc->caps, i); 802 sc->ai[i] = (struct hid_absinfo) { 803 .max = hi.logical_maximum, 804 .min = hi.logical_minimum, 805 .res = hid_item_resolution(&hi), 806 }; 807 break; 808 } 809 } 810 break; 811 default: 812 break; 813 } 814 } 815 hid_end_parse(hd); 816 817 /* Check for required HID Usages */ 818 if (!cont_count_found || !scan_time_found || cont == 0) 819 return (HMT_TYPE_UNSUPPORTED); 820 for (i = 0; i < HMT_N_USAGES; i++) { 821 if (hmt_hid_map[i].required && isclr(sc->caps, i)) 822 return (HMT_TYPE_UNSUPPORTED); 823 } 824 825 /* Touchpads must have at least one button */ 826 if (type == HMT_TYPE_TOUCHPAD && !sc->max_button && !has_int_button) 827 return (HMT_TYPE_UNSUPPORTED); 828 829 /* 830 * According to specifications 'Contact Count Maximum' should be read 831 * from Feature Report rather than from HID descriptor. Set sane 832 * default value now to handle the case of 'Get Report' request failure 833 */ 834 if (cont_count_max < 1) 835 cont_count_max = cont; 836 837 /* Set number of MT protocol type B slots */ 838 sc->ai[HMT_SLOT] = (struct hid_absinfo) { 839 .min = 0, 840 .max = cont_count_max - 1, 841 .res = 0, 842 }; 843 844 /* Report touch orientation if both width and height are supported */ 845 if (isset(sc->caps, HMT_WIDTH) && isset(sc->caps, HMT_HEIGHT)) { 846 setbit(sc->caps, HMT_ORIENTATION); 847 sc->ai[HMT_ORIENTATION].max = 1; 848 } 849 850 sc->cont_max_rlen = hid_report_size(d_ptr, d_len, hid_feature, 851 sc->cont_max_rid); 852 if (sc->btn_type_rid > 0) 853 sc->btn_type_rlen = hid_report_size(d_ptr, d_len, 854 hid_feature, sc->btn_type_rid); 855 if (sc->thqa_cert_rid > 0) 856 sc->thqa_cert_rlen = hid_report_size(d_ptr, d_len, 857 hid_feature, sc->thqa_cert_rid); 858 859 sc->report_id = report_id; 860 sc->nconts_per_report = cont; 861 sc->has_int_button = has_int_button; 862 863 return (type); 864 } 865 866 static int 867 hmt_set_input_mode(struct hmt_softc *sc, enum hconf_input_mode mode) 868 { 869 devclass_t hconf_devclass; 870 device_t hconf; 871 int err; 872 873 GIANT_REQUIRED; 874 875 /* Find touchpad's configuration TLC */ 876 hconf = hidbus_find_child(device_get_parent(sc->dev), 877 HID_USAGE2(HUP_DIGITIZERS, HUD_CONFIG)); 878 if (hconf == NULL) 879 return (ENXIO); 880 881 /* Ensure that hconf driver is attached to configuration TLC */ 882 if (device_is_alive(hconf) == 0) 883 device_probe_and_attach(hconf); 884 if (device_is_attached(hconf) == 0) 885 return (ENXIO); 886 hconf_devclass = devclass_find("hconf"); 887 if (device_get_devclass(hconf) != hconf_devclass) 888 return (ENXIO); 889 890 /* hconf_set_input_mode can drop the Giant while sleeping */ 891 device_busy(hconf); 892 err = hconf_set_input_mode(hconf, mode); 893 device_unbusy(hconf); 894 895 return (err); 896 } 897 898 static devclass_t hmt_devclass; 899 900 static device_method_t hmt_methods[] = { 901 DEVMETHOD(device_probe, hmt_probe), 902 DEVMETHOD(device_attach, hmt_attach), 903 DEVMETHOD(device_detach, hmt_detach), 904 905 DEVMETHOD_END 906 }; 907 908 static driver_t hmt_driver = { 909 .name = "hmt", 910 .methods = hmt_methods, 911 .size = sizeof(struct hmt_softc), 912 }; 913 914 DRIVER_MODULE(hmt, hidbus, hmt_driver, hmt_devclass, NULL, 0); 915 MODULE_DEPEND(hmt, hidbus, 1, 1, 1); 916 MODULE_DEPEND(hmt, hid, 1, 1, 1); 917 MODULE_DEPEND(hmt, hconf, 1, 1, 1); 918 MODULE_DEPEND(hmt, evdev, 1, 1, 1); 919 MODULE_VERSION(hmt, 1); 920 HID_PNP_INFO(hmt_devs);
Cache object: 97fc649fb3ed59a74ea15ae4bd352c96
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]