1 /* 2 * HID driver for multitouch panels 3 * 4 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> 5 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com> 6 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France 7 * Copyright (c) 2012-2013 Red Hat, Inc 8 * 9 * This code is partly based on hid-egalax.c: 10 * 11 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr> 12 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se> 13 * Copyright (c) 2010 Canonical, Ltd. 14 * 15 * This code is partly based on hid-3m-pct.c: 16 * 17 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr> 18 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se> 19 * Copyright (c) 2010 Canonical, Ltd. 20 * 21 */ 22 23 /* 24 * This program is free software; you can redistribute it and/or modify it 25 * under the terms of the GNU General Public License as published by the Free 26 * Software Foundation; either version 2 of the License, or (at your option) 27 * any later version. 28 */ 29 30 /* 31 * This driver is regularly tested thanks to the tool hid-test[1]. 32 * This tool relies on hid-replay[2] and a database of hid devices[3]. 33 * Please run these regression tests before patching this module so that 34 * your patch won't break existing known devices. 35 * 36 * [1] https://github.com/bentiss/hid-test 37 * [2] https://github.com/bentiss/hid-replay 38 * [3] https://github.com/bentiss/hid-devices 39 */ 40 41 #include <linux/device.h> 42 #include <linux/hid.h> 43 #include <linux/module.h> 44 #include <linux/slab.h> 45 #include <linux/input/mt.h> 46 #include <linux/string.h> 47 #include <linux/timer.h> 48 49 50 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>"); 51 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 52 MODULE_DESCRIPTION("HID multitouch panels"); 53 MODULE_LICENSE("GPL"); 54 55 #include "hid-ids.h" 56 57 /* quirks to control the device */ 58 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0) 59 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1) 60 #define MT_QUIRK_CYPRESS BIT(2) 61 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3) 62 #define MT_QUIRK_ALWAYS_VALID BIT(4) 63 #define MT_QUIRK_VALID_IS_INRANGE BIT(5) 64 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6) 65 #define MT_QUIRK_CONFIDENCE BIT(7) 66 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8) 67 #define MT_QUIRK_NO_AREA BIT(9) 68 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10) 69 #define MT_QUIRK_HOVERING BIT(11) 70 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12) 71 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13) 72 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14) 73 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15) 74 #define MT_QUIRK_STICKY_FINGERS BIT(16) 75 76 #define MT_INPUTMODE_TOUCHSCREEN 0x02 77 #define MT_INPUTMODE_TOUCHPAD 0x03 78 79 #define MT_BUTTONTYPE_CLICKPAD 0 80 81 #define MT_IO_FLAGS_RUNNING 0 82 #define MT_IO_FLAGS_ACTIVE_SLOTS 1 83 #define MT_IO_FLAGS_PENDING_SLOTS 2 84 85 struct mt_slot { 86 __s32 x, y, cx, cy, p, w, h; 87 __s32 contactid; /* the device ContactID assigned to this slot */ 88 bool touch_state; /* is the touch valid? */ 89 bool inrange_state; /* is the finger in proximity of the sensor? */ 90 bool confidence_state; /* is the touch made by a finger? */ 91 }; 92 93 struct mt_class { 94 __s32 name; /* MT_CLS */ 95 __s32 quirks; 96 __s32 sn_move; /* Signal/noise ratio for move events */ 97 __s32 sn_width; /* Signal/noise ratio for width events */ 98 __s32 sn_height; /* Signal/noise ratio for height events */ 99 __s32 sn_pressure; /* Signal/noise ratio for pressure events */ 100 __u8 maxcontacts; 101 bool is_indirect; /* true for touchpads */ 102 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */ 103 }; 104 105 struct mt_fields { 106 unsigned usages[HID_MAX_FIELDS]; 107 unsigned int length; 108 }; 109 110 struct mt_device { 111 struct mt_slot curdata; /* placeholder of incoming data */ 112 struct mt_class mtclass; /* our mt device class */ 113 struct timer_list release_timer; /* to release sticky fingers */ 114 struct mt_fields *fields; /* temporary placeholder for storing the 115 multitouch fields */ 116 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */ 117 int cc_index; /* contact count field index in the report */ 118 int cc_value_index; /* contact count value index in the field */ 119 unsigned last_slot_field; /* the last field of a slot */ 120 unsigned mt_report_id; /* the report ID of the multitouch device */ 121 unsigned long initial_quirks; /* initial quirks state */ 122 __s16 inputmode; /* InputMode HID feature, -1 if non-existent */ 123 __s16 inputmode_index; /* InputMode HID feature index in the report */ 124 __s16 maxcontact_report_id; /* Maximum Contact Number HID feature, 125 -1 if non-existent */ 126 __u8 inputmode_value; /* InputMode HID feature value */ 127 __u8 num_received; /* how many contacts we received */ 128 __u8 num_expected; /* expected last contact index */ 129 __u8 maxcontacts; 130 __u8 touches_by_report; /* how many touches are present in one report: 131 * 1 means we should use a serial protocol 132 * > 1 means hybrid (multitouch) protocol */ 133 __u8 buttons_count; /* number of physical buttons per touchpad */ 134 bool is_buttonpad; /* is this device a button pad? */ 135 bool serial_maybe; /* need to check for serial protocol */ 136 bool curvalid; /* is the current contact valid? */ 137 unsigned mt_flags; /* flags to pass to input-mt */ 138 }; 139 140 static void mt_post_parse_default_settings(struct mt_device *td); 141 static void mt_post_parse(struct mt_device *td); 142 143 /* classes of device behavior */ 144 #define MT_CLS_DEFAULT 0x0001 145 146 #define MT_CLS_SERIAL 0x0002 147 #define MT_CLS_CONFIDENCE 0x0003 148 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004 149 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005 150 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006 151 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007 152 /* reserved 0x0008 */ 153 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009 154 #define MT_CLS_NSMU 0x000a 155 /* reserved 0x0010 */ 156 /* reserved 0x0011 */ 157 #define MT_CLS_WIN_8 0x0012 158 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013 159 #define MT_CLS_WIN_8_DUAL 0x0014 160 161 /* vendor specific classes */ 162 #define MT_CLS_3M 0x0101 163 /* reserved 0x0102 */ 164 #define MT_CLS_EGALAX 0x0103 165 #define MT_CLS_EGALAX_SERIAL 0x0104 166 #define MT_CLS_TOPSEED 0x0105 167 #define MT_CLS_PANASONIC 0x0106 168 #define MT_CLS_FLATFROG 0x0107 169 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108 170 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109 171 #define MT_CLS_LG 0x010a 172 #define MT_CLS_VTL 0x0110 173 #define MT_CLS_GOOGLE 0x0111 174 175 #define MT_DEFAULT_MAXCONTACT 10 176 #define MT_MAX_MAXCONTACT 250 177 178 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p) 179 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p) 180 181 /* 182 * these device-dependent functions determine what slot corresponds 183 * to a valid contact that was just read. 184 */ 185 186 static int cypress_compute_slot(struct mt_device *td) 187 { 188 if (td->curdata.contactid != 0 || td->num_received == 0) 189 return td->curdata.contactid; 190 else 191 return -1; 192 } 193 194 static struct mt_class mt_classes[] = { 195 { .name = MT_CLS_DEFAULT, 196 .quirks = MT_QUIRK_ALWAYS_VALID | 197 MT_QUIRK_CONTACT_CNT_ACCURATE }, 198 { .name = MT_CLS_NSMU, 199 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP }, 200 { .name = MT_CLS_SERIAL, 201 .quirks = MT_QUIRK_ALWAYS_VALID}, 202 { .name = MT_CLS_CONFIDENCE, 203 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE }, 204 { .name = MT_CLS_CONFIDENCE_CONTACT_ID, 205 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 206 MT_QUIRK_SLOT_IS_CONTACTID }, 207 { .name = MT_CLS_CONFIDENCE_MINUS_ONE, 208 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 209 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE }, 210 { .name = MT_CLS_DUAL_INRANGE_CONTACTID, 211 .quirks = MT_QUIRK_VALID_IS_INRANGE | 212 MT_QUIRK_SLOT_IS_CONTACTID, 213 .maxcontacts = 2 }, 214 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 215 .quirks = MT_QUIRK_VALID_IS_INRANGE | 216 MT_QUIRK_SLOT_IS_CONTACTNUMBER, 217 .maxcontacts = 2 }, 218 { .name = MT_CLS_INRANGE_CONTACTNUMBER, 219 .quirks = MT_QUIRK_VALID_IS_INRANGE | 220 MT_QUIRK_SLOT_IS_CONTACTNUMBER }, 221 { .name = MT_CLS_WIN_8, 222 .quirks = MT_QUIRK_ALWAYS_VALID | 223 MT_QUIRK_IGNORE_DUPLICATES | 224 MT_QUIRK_HOVERING | 225 MT_QUIRK_CONTACT_CNT_ACCURATE | 226 MT_QUIRK_STICKY_FINGERS }, 227 { .name = MT_CLS_EXPORT_ALL_INPUTS, 228 .quirks = MT_QUIRK_ALWAYS_VALID | 229 MT_QUIRK_CONTACT_CNT_ACCURATE, 230 .export_all_inputs = true }, 231 { .name = MT_CLS_WIN_8_DUAL, 232 .quirks = MT_QUIRK_ALWAYS_VALID | 233 MT_QUIRK_IGNORE_DUPLICATES | 234 MT_QUIRK_HOVERING | 235 MT_QUIRK_CONTACT_CNT_ACCURATE, 236 .export_all_inputs = true }, 237 238 /* 239 * vendor specific classes 240 */ 241 { .name = MT_CLS_3M, 242 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 243 MT_QUIRK_SLOT_IS_CONTACTID | 244 MT_QUIRK_TOUCH_SIZE_SCALING, 245 .sn_move = 2048, 246 .sn_width = 128, 247 .sn_height = 128, 248 .maxcontacts = 60, 249 }, 250 { .name = MT_CLS_EGALAX, 251 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 252 MT_QUIRK_VALID_IS_INRANGE, 253 .sn_move = 4096, 254 .sn_pressure = 32, 255 }, 256 { .name = MT_CLS_EGALAX_SERIAL, 257 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 258 MT_QUIRK_ALWAYS_VALID, 259 .sn_move = 4096, 260 .sn_pressure = 32, 261 }, 262 { .name = MT_CLS_TOPSEED, 263 .quirks = MT_QUIRK_ALWAYS_VALID, 264 .is_indirect = true, 265 .maxcontacts = 2, 266 }, 267 { .name = MT_CLS_PANASONIC, 268 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP, 269 .maxcontacts = 4 }, 270 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS, 271 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 272 MT_QUIRK_VALID_IS_INRANGE | 273 MT_QUIRK_SLOT_IS_CONTACTID, 274 .maxcontacts = 2 275 }, 276 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 277 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 278 MT_QUIRK_SLOT_IS_CONTACTID 279 }, 280 281 { .name = MT_CLS_FLATFROG, 282 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 283 MT_QUIRK_NO_AREA, 284 .sn_move = 2048, 285 .maxcontacts = 40, 286 }, 287 { .name = MT_CLS_LG, 288 .quirks = MT_QUIRK_ALWAYS_VALID | 289 MT_QUIRK_FIX_CONST_CONTACT_ID | 290 MT_QUIRK_IGNORE_DUPLICATES | 291 MT_QUIRK_HOVERING | 292 MT_QUIRK_CONTACT_CNT_ACCURATE }, 293 { .name = MT_CLS_VTL, 294 .quirks = MT_QUIRK_ALWAYS_VALID | 295 MT_QUIRK_CONTACT_CNT_ACCURATE | 296 MT_QUIRK_FORCE_GET_FEATURE, 297 }, 298 { .name = MT_CLS_GOOGLE, 299 .quirks = MT_QUIRK_ALWAYS_VALID | 300 MT_QUIRK_CONTACT_CNT_ACCURATE | 301 MT_QUIRK_SLOT_IS_CONTACTID | 302 MT_QUIRK_HOVERING 303 }, 304 { } 305 }; 306 307 static ssize_t mt_show_quirks(struct device *dev, 308 struct device_attribute *attr, 309 char *buf) 310 { 311 struct hid_device *hdev = to_hid_device(dev); 312 struct mt_device *td = hid_get_drvdata(hdev); 313 314 return sprintf(buf, "%u\n", td->mtclass.quirks); 315 } 316 317 static ssize_t mt_set_quirks(struct device *dev, 318 struct device_attribute *attr, 319 const char *buf, size_t count) 320 { 321 struct hid_device *hdev = to_hid_device(dev); 322 struct mt_device *td = hid_get_drvdata(hdev); 323 324 unsigned long val; 325 326 if (kstrtoul(buf, 0, &val)) 327 return -EINVAL; 328 329 td->mtclass.quirks = val; 330 331 if (td->cc_index < 0) 332 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 333 334 return count; 335 } 336 337 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks); 338 339 static struct attribute *sysfs_attrs[] = { 340 &dev_attr_quirks.attr, 341 NULL 342 }; 343 344 static struct attribute_group mt_attribute_group = { 345 .attrs = sysfs_attrs 346 }; 347 348 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report) 349 { 350 struct mt_device *td = hid_get_drvdata(hdev); 351 int ret, size = hid_report_len(report); 352 u8 *buf; 353 354 /* 355 * Do not fetch the feature report if the device has been explicitly 356 * marked as non-capable. 357 */ 358 if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS) 359 return; 360 361 buf = hid_alloc_report_buf(report, GFP_KERNEL); 362 if (!buf) 363 return; 364 365 ret = hid_hw_raw_request(hdev, report->id, buf, size, 366 HID_FEATURE_REPORT, HID_REQ_GET_REPORT); 367 if (ret < 0) { 368 dev_warn(&hdev->dev, "failed to fetch feature %d\n", 369 report->id); 370 } else { 371 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf, 372 size, 0); 373 if (ret) 374 dev_warn(&hdev->dev, "failed to report feature\n"); 375 } 376 377 kfree(buf); 378 } 379 380 static void mt_feature_mapping(struct hid_device *hdev, 381 struct hid_field *field, struct hid_usage *usage) 382 { 383 struct mt_device *td = hid_get_drvdata(hdev); 384 385 switch (usage->hid) { 386 case HID_DG_INPUTMODE: 387 /* Ignore if value index is out of bounds. */ 388 if (usage->usage_index >= field->report_count) { 389 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n"); 390 break; 391 } 392 393 if (td->inputmode < 0) { 394 td->inputmode = field->report->id; 395 td->inputmode_index = usage->usage_index; 396 } else { 397 /* 398 * Some elan panels wrongly declare 2 input mode 399 * features, and silently ignore when we set the 400 * value in the second field. Skip the second feature 401 * and hope for the best. 402 */ 403 dev_info(&hdev->dev, 404 "Ignoring the extra HID_DG_INPUTMODE\n"); 405 } 406 407 break; 408 case HID_DG_CONTACTMAX: 409 mt_get_feature(hdev, field->report); 410 411 td->maxcontact_report_id = field->report->id; 412 td->maxcontacts = field->value[0]; 413 if (!td->maxcontacts && 414 field->logical_maximum <= MT_MAX_MAXCONTACT) 415 td->maxcontacts = field->logical_maximum; 416 if (td->mtclass.maxcontacts) 417 /* check if the maxcontacts is given by the class */ 418 td->maxcontacts = td->mtclass.maxcontacts; 419 420 break; 421 case HID_DG_BUTTONTYPE: 422 if (usage->usage_index >= field->report_count) { 423 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n"); 424 break; 425 } 426 427 mt_get_feature(hdev, field->report); 428 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD) 429 td->is_buttonpad = true; 430 431 break; 432 case 0xff0000c5: 433 /* Retrieve the Win8 blob once to enable some devices */ 434 if (usage->usage_index == 0) 435 mt_get_feature(hdev, field->report); 436 break; 437 } 438 } 439 440 static void set_abs(struct input_dev *input, unsigned int code, 441 struct hid_field *field, int snratio) 442 { 443 int fmin = field->logical_minimum; 444 int fmax = field->logical_maximum; 445 int fuzz = snratio ? (fmax - fmin) / snratio : 0; 446 input_set_abs_params(input, code, fmin, fmax, fuzz, 0); 447 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code)); 448 } 449 450 static void mt_store_field(struct hid_usage *usage, struct mt_device *td, 451 struct hid_input *hi) 452 { 453 struct mt_fields *f = td->fields; 454 455 if (f->length >= HID_MAX_FIELDS) 456 return; 457 458 f->usages[f->length++] = usage->hid; 459 } 460 461 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 462 struct hid_field *field, struct hid_usage *usage, 463 unsigned long **bit, int *max) 464 { 465 struct mt_device *td = hid_get_drvdata(hdev); 466 struct mt_class *cls = &td->mtclass; 467 int code; 468 struct hid_usage *prev_usage = NULL; 469 470 if (field->application == HID_DG_TOUCHSCREEN) 471 td->mt_flags |= INPUT_MT_DIRECT; 472 473 /* 474 * Model touchscreens providing buttons as touchpads. 475 */ 476 if (field->application == HID_DG_TOUCHPAD || 477 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) { 478 td->mt_flags |= INPUT_MT_POINTER; 479 td->inputmode_value = MT_INPUTMODE_TOUCHPAD; 480 } 481 482 /* count the buttons on touchpads */ 483 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) 484 td->buttons_count++; 485 486 if (usage->usage_index) 487 prev_usage = &field->usage[usage->usage_index - 1]; 488 489 switch (usage->hid & HID_USAGE_PAGE) { 490 491 case HID_UP_GENDESK: 492 switch (usage->hid) { 493 case HID_GD_X: 494 if (prev_usage && (prev_usage->hid == usage->hid)) { 495 hid_map_usage(hi, usage, bit, max, 496 EV_ABS, ABS_MT_TOOL_X); 497 set_abs(hi->input, ABS_MT_TOOL_X, field, 498 cls->sn_move); 499 } else { 500 hid_map_usage(hi, usage, bit, max, 501 EV_ABS, ABS_MT_POSITION_X); 502 set_abs(hi->input, ABS_MT_POSITION_X, field, 503 cls->sn_move); 504 } 505 506 mt_store_field(usage, td, hi); 507 return 1; 508 case HID_GD_Y: 509 if (prev_usage && (prev_usage->hid == usage->hid)) { 510 hid_map_usage(hi, usage, bit, max, 511 EV_ABS, ABS_MT_TOOL_Y); 512 set_abs(hi->input, ABS_MT_TOOL_Y, field, 513 cls->sn_move); 514 } else { 515 hid_map_usage(hi, usage, bit, max, 516 EV_ABS, ABS_MT_POSITION_Y); 517 set_abs(hi->input, ABS_MT_POSITION_Y, field, 518 cls->sn_move); 519 } 520 521 mt_store_field(usage, td, hi); 522 return 1; 523 } 524 return 0; 525 526 case HID_UP_DIGITIZER: 527 switch (usage->hid) { 528 case HID_DG_INRANGE: 529 if (cls->quirks & MT_QUIRK_HOVERING) { 530 hid_map_usage(hi, usage, bit, max, 531 EV_ABS, ABS_MT_DISTANCE); 532 input_set_abs_params(hi->input, 533 ABS_MT_DISTANCE, 0, 1, 0, 0); 534 } 535 mt_store_field(usage, td, hi); 536 return 1; 537 case HID_DG_CONFIDENCE: 538 if ((cls->name == MT_CLS_WIN_8 || 539 cls->name == MT_CLS_WIN_8_DUAL) && 540 field->application == HID_DG_TOUCHPAD) 541 cls->quirks |= MT_QUIRK_CONFIDENCE; 542 mt_store_field(usage, td, hi); 543 return 1; 544 case HID_DG_TIPSWITCH: 545 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH); 546 input_set_capability(hi->input, EV_KEY, BTN_TOUCH); 547 mt_store_field(usage, td, hi); 548 return 1; 549 case HID_DG_CONTACTID: 550 mt_store_field(usage, td, hi); 551 td->touches_by_report++; 552 td->mt_report_id = field->report->id; 553 return 1; 554 case HID_DG_WIDTH: 555 hid_map_usage(hi, usage, bit, max, 556 EV_ABS, ABS_MT_TOUCH_MAJOR); 557 if (!(cls->quirks & MT_QUIRK_NO_AREA)) 558 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field, 559 cls->sn_width); 560 mt_store_field(usage, td, hi); 561 return 1; 562 case HID_DG_HEIGHT: 563 hid_map_usage(hi, usage, bit, max, 564 EV_ABS, ABS_MT_TOUCH_MINOR); 565 if (!(cls->quirks & MT_QUIRK_NO_AREA)) { 566 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field, 567 cls->sn_height); 568 input_set_abs_params(hi->input, 569 ABS_MT_ORIENTATION, 0, 1, 0, 0); 570 } 571 mt_store_field(usage, td, hi); 572 return 1; 573 case HID_DG_TIPPRESSURE: 574 hid_map_usage(hi, usage, bit, max, 575 EV_ABS, ABS_MT_PRESSURE); 576 set_abs(hi->input, ABS_MT_PRESSURE, field, 577 cls->sn_pressure); 578 mt_store_field(usage, td, hi); 579 return 1; 580 case HID_DG_CONTACTCOUNT: 581 /* Ignore if indexes are out of bounds. */ 582 if (field->index >= field->report->maxfield || 583 usage->usage_index >= field->report_count) 584 return 1; 585 td->cc_index = field->index; 586 td->cc_value_index = usage->usage_index; 587 return 1; 588 case HID_DG_CONTACTMAX: 589 /* we don't set td->last_slot_field as contactcount and 590 * contact max are global to the report */ 591 return -1; 592 case HID_DG_TOUCH: 593 /* Legacy devices use TIPSWITCH and not TOUCH. 594 * Let's just ignore this field. */ 595 return -1; 596 } 597 /* let hid-input decide for the others */ 598 return 0; 599 600 case HID_UP_BUTTON: 601 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE); 602 /* 603 * MS PTP spec says that external buttons left and right have 604 * usages 2 and 3. 605 */ 606 if ((cls->name == MT_CLS_WIN_8 || 607 cls->name == MT_CLS_WIN_8_DUAL) && 608 field->application == HID_DG_TOUCHPAD && 609 (usage->hid & HID_USAGE) > 1) 610 code--; 611 hid_map_usage(hi, usage, bit, max, EV_KEY, code); 612 input_set_capability(hi->input, EV_KEY, code); 613 return 1; 614 615 case 0xff000000: 616 /* we do not want to map these: no input-oriented meaning */ 617 return -1; 618 } 619 620 return 0; 621 } 622 623 static int mt_compute_slot(struct mt_device *td, struct input_dev *input) 624 { 625 __s32 quirks = td->mtclass.quirks; 626 627 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID) 628 return td->curdata.contactid; 629 630 if (quirks & MT_QUIRK_CYPRESS) 631 return cypress_compute_slot(td); 632 633 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER) 634 return td->num_received; 635 636 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE) 637 return td->curdata.contactid - 1; 638 639 return input_mt_get_slot_by_key(input, td->curdata.contactid); 640 } 641 642 /* 643 * this function is called when a whole contact has been processed, 644 * so that it can assign it to a slot and store the data there 645 */ 646 static void mt_complete_slot(struct mt_device *td, struct input_dev *input) 647 { 648 if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) && 649 td->num_received >= td->num_expected) 650 return; 651 652 if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) { 653 int active; 654 int slotnum = mt_compute_slot(td, input); 655 struct mt_slot *s = &td->curdata; 656 struct input_mt *mt = input->mt; 657 658 if (slotnum < 0 || slotnum >= td->maxcontacts) 659 return; 660 661 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) { 662 struct input_mt_slot *slot = &mt->slots[slotnum]; 663 if (input_mt_is_active(slot) && 664 input_mt_is_used(mt, slot)) 665 return; 666 } 667 668 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE)) 669 s->confidence_state = 1; 670 active = (s->touch_state || s->inrange_state) && 671 s->confidence_state; 672 673 input_mt_slot(input, slotnum); 674 input_mt_report_slot_state(input, MT_TOOL_FINGER, active); 675 if (active) { 676 /* this finger is in proximity of the sensor */ 677 int wide = (s->w > s->h); 678 int major = max(s->w, s->h); 679 int minor = min(s->w, s->h); 680 681 /* 682 * divided by two to match visual scale of touch 683 * for devices with this quirk 684 */ 685 if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) { 686 major = major >> 1; 687 minor = minor >> 1; 688 } 689 690 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x); 691 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y); 692 input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx); 693 input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy); 694 input_event(input, EV_ABS, ABS_MT_DISTANCE, 695 !s->touch_state); 696 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide); 697 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p); 698 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); 699 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); 700 701 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags); 702 } 703 } 704 705 td->num_received++; 706 } 707 708 /* 709 * this function is called when a whole packet has been received and processed, 710 * so that it can decide what to send to the input layer. 711 */ 712 static void mt_sync_frame(struct mt_device *td, struct input_dev *input) 713 { 714 input_mt_sync_frame(input); 715 input_sync(input); 716 td->num_received = 0; 717 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags)) 718 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags); 719 else 720 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags); 721 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags); 722 } 723 724 static int mt_touch_event(struct hid_device *hid, struct hid_field *field, 725 struct hid_usage *usage, __s32 value) 726 { 727 /* we will handle the hidinput part later, now remains hiddev */ 728 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event) 729 hid->hiddev_hid_event(hid, field, usage, value); 730 731 return 1; 732 } 733 734 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field, 735 struct hid_usage *usage, __s32 value) 736 { 737 struct mt_device *td = hid_get_drvdata(hid); 738 __s32 quirks = td->mtclass.quirks; 739 struct input_dev *input = field->hidinput->input; 740 741 if (hid->claimed & HID_CLAIMED_INPUT) { 742 switch (usage->hid) { 743 case HID_DG_INRANGE: 744 if (quirks & MT_QUIRK_VALID_IS_INRANGE) 745 td->curvalid = value; 746 if (quirks & MT_QUIRK_HOVERING) 747 td->curdata.inrange_state = value; 748 break; 749 case HID_DG_TIPSWITCH: 750 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) 751 td->curvalid = value; 752 td->curdata.touch_state = value; 753 break; 754 case HID_DG_CONFIDENCE: 755 if (quirks & MT_QUIRK_CONFIDENCE) 756 td->curdata.confidence_state = value; 757 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE) 758 td->curvalid = value; 759 break; 760 case HID_DG_CONTACTID: 761 td->curdata.contactid = value; 762 break; 763 case HID_DG_TIPPRESSURE: 764 td->curdata.p = value; 765 break; 766 case HID_GD_X: 767 if (usage->code == ABS_MT_TOOL_X) 768 td->curdata.cx = value; 769 else 770 td->curdata.x = value; 771 break; 772 case HID_GD_Y: 773 if (usage->code == ABS_MT_TOOL_Y) 774 td->curdata.cy = value; 775 else 776 td->curdata.y = value; 777 break; 778 case HID_DG_WIDTH: 779 td->curdata.w = value; 780 break; 781 case HID_DG_HEIGHT: 782 td->curdata.h = value; 783 break; 784 case HID_DG_CONTACTCOUNT: 785 break; 786 case HID_DG_TOUCH: 787 /* do nothing */ 788 break; 789 790 default: 791 if (usage->type) 792 input_event(input, usage->type, usage->code, 793 value); 794 return; 795 } 796 797 if (usage->usage_index + 1 == field->report_count) { 798 /* we only take into account the last report. */ 799 if (usage->hid == td->last_slot_field) 800 mt_complete_slot(td, field->hidinput->input); 801 } 802 803 } 804 } 805 806 static void mt_touch_report(struct hid_device *hid, struct hid_report *report) 807 { 808 struct mt_device *td = hid_get_drvdata(hid); 809 struct hid_field *field; 810 unsigned count; 811 int r, n; 812 813 /* sticky fingers release in progress, abort */ 814 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags)) 815 return; 816 817 /* 818 * Includes multi-packet support where subsequent 819 * packets are sent with zero contactcount. 820 */ 821 if (td->cc_index >= 0) { 822 struct hid_field *field = report->field[td->cc_index]; 823 int value = field->value[td->cc_value_index]; 824 if (value) 825 td->num_expected = value; 826 } 827 828 for (r = 0; r < report->maxfield; r++) { 829 field = report->field[r]; 830 count = field->report_count; 831 832 if (!(HID_MAIN_ITEM_VARIABLE & field->flags)) 833 continue; 834 835 for (n = 0; n < count; n++) 836 mt_process_mt_event(hid, field, &field->usage[n], 837 field->value[n]); 838 } 839 840 if (td->num_received >= td->num_expected) 841 mt_sync_frame(td, report->field[0]->hidinput->input); 842 843 /* 844 * Windows 8 specs says 2 things: 845 * - once a contact has been reported, it has to be reported in each 846 * subsequent report 847 * - the report rate when fingers are present has to be at least 848 * the refresh rate of the screen, 60 or 120 Hz 849 * 850 * I interprete this that the specification forces a report rate of 851 * at least 60 Hz for a touchscreen to be certified. 852 * Which means that if we do not get a report whithin 16 ms, either 853 * something wrong happens, either the touchscreen forgets to send 854 * a release. Taking a reasonable margin allows to remove issues 855 * with USB communication or the load of the machine. 856 * 857 * Given that Win 8 devices are forced to send a release, this will 858 * only affect laggish machines and the ones that have a firmware 859 * defect. 860 */ 861 if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) { 862 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags)) 863 mod_timer(&td->release_timer, 864 jiffies + msecs_to_jiffies(100)); 865 else 866 del_timer(&td->release_timer); 867 } 868 869 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags); 870 } 871 872 static int mt_touch_input_configured(struct hid_device *hdev, 873 struct hid_input *hi) 874 { 875 struct mt_device *td = hid_get_drvdata(hdev); 876 struct mt_class *cls = &td->mtclass; 877 struct input_dev *input = hi->input; 878 int ret; 879 880 if (!td->maxcontacts) 881 td->maxcontacts = MT_DEFAULT_MAXCONTACT; 882 883 mt_post_parse(td); 884 if (td->serial_maybe) 885 mt_post_parse_default_settings(td); 886 887 if (cls->is_indirect) 888 td->mt_flags |= INPUT_MT_POINTER; 889 890 if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) 891 td->mt_flags |= INPUT_MT_DROP_UNUSED; 892 893 /* check for clickpads */ 894 if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1)) 895 td->is_buttonpad = true; 896 897 if (td->is_buttonpad) 898 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 899 900 ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags); 901 if (ret) 902 return ret; 903 904 td->mt_flags = 0; 905 return 0; 906 } 907 908 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, 909 struct hid_field *field, struct hid_usage *usage, 910 unsigned long **bit, int *max) 911 { 912 struct mt_device *td = hid_get_drvdata(hdev); 913 914 /* 915 * If mtclass.export_all_inputs is not set, only map fields from 916 * TouchScreen or TouchPad collections. We need to ignore fields 917 * that belong to other collections such as Mouse that might have 918 * the same GenericDesktop usages. 919 */ 920 if (!td->mtclass.export_all_inputs && 921 field->application != HID_DG_TOUCHSCREEN && 922 field->application != HID_DG_PEN && 923 field->application != HID_DG_TOUCHPAD && 924 field->application != HID_GD_KEYBOARD && 925 field->application != HID_CP_CONSUMER_CONTROL) 926 return -1; 927 928 /* 929 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN" 930 * for the stylus. 931 * The check for mt_report_id ensures we don't process 932 * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical 933 * collection, but within the report ID. 934 */ 935 if (field->physical == HID_DG_STYLUS) 936 return 0; 937 else if ((field->physical == 0) && 938 (field->report->id != td->mt_report_id) && 939 (td->mt_report_id != -1)) 940 return 0; 941 942 if (field->application == HID_DG_TOUCHSCREEN || 943 field->application == HID_DG_TOUCHPAD) 944 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max); 945 946 /* let hid-core decide for the others */ 947 return 0; 948 } 949 950 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi, 951 struct hid_field *field, struct hid_usage *usage, 952 unsigned long **bit, int *max) 953 { 954 /* 955 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN" 956 * for the stylus. 957 */ 958 if (field->physical == HID_DG_STYLUS) 959 return 0; 960 961 if (field->application == HID_DG_TOUCHSCREEN || 962 field->application == HID_DG_TOUCHPAD) { 963 /* We own these mappings, tell hid-input to ignore them */ 964 return -1; 965 } 966 967 /* let hid-core decide for the others */ 968 return 0; 969 } 970 971 static int mt_event(struct hid_device *hid, struct hid_field *field, 972 struct hid_usage *usage, __s32 value) 973 { 974 struct mt_device *td = hid_get_drvdata(hid); 975 976 if (field->report->id == td->mt_report_id) 977 return mt_touch_event(hid, field, usage, value); 978 979 return 0; 980 } 981 982 static void mt_report(struct hid_device *hid, struct hid_report *report) 983 { 984 struct mt_device *td = hid_get_drvdata(hid); 985 struct hid_field *field = report->field[0]; 986 987 if (!(hid->claimed & HID_CLAIMED_INPUT)) 988 return; 989 990 if (report->id == td->mt_report_id) 991 return mt_touch_report(hid, report); 992 993 if (field && field->hidinput && field->hidinput->input) 994 input_sync(field->hidinput->input); 995 } 996 997 static void mt_set_input_mode(struct hid_device *hdev) 998 { 999 struct mt_device *td = hid_get_drvdata(hdev); 1000 struct hid_report *r; 1001 struct hid_report_enum *re; 1002 struct mt_class *cls = &td->mtclass; 1003 char *buf; 1004 int report_len; 1005 1006 if (td->inputmode < 0) 1007 return; 1008 1009 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 1010 r = re->report_id_hash[td->inputmode]; 1011 if (r) { 1012 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) { 1013 report_len = hid_report_len(r); 1014 buf = hid_alloc_report_buf(r, GFP_KERNEL); 1015 if (!buf) { 1016 hid_err(hdev, "failed to allocate buffer for report\n"); 1017 return; 1018 } 1019 hid_hw_raw_request(hdev, r->id, buf, report_len, 1020 HID_FEATURE_REPORT, 1021 HID_REQ_GET_REPORT); 1022 kfree(buf); 1023 } 1024 r->field[0]->value[td->inputmode_index] = td->inputmode_value; 1025 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 1026 } 1027 } 1028 1029 static void mt_set_maxcontacts(struct hid_device *hdev) 1030 { 1031 struct mt_device *td = hid_get_drvdata(hdev); 1032 struct hid_report *r; 1033 struct hid_report_enum *re; 1034 int fieldmax, max; 1035 1036 if (td->maxcontact_report_id < 0) 1037 return; 1038 1039 if (!td->mtclass.maxcontacts) 1040 return; 1041 1042 re = &hdev->report_enum[HID_FEATURE_REPORT]; 1043 r = re->report_id_hash[td->maxcontact_report_id]; 1044 if (r) { 1045 max = td->mtclass.maxcontacts; 1046 fieldmax = r->field[0]->logical_maximum; 1047 max = min(fieldmax, max); 1048 if (r->field[0]->value[0] != max) { 1049 r->field[0]->value[0] = max; 1050 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 1051 } 1052 } 1053 } 1054 1055 static void mt_post_parse_default_settings(struct mt_device *td) 1056 { 1057 __s32 quirks = td->mtclass.quirks; 1058 1059 /* unknown serial device needs special quirks */ 1060 if (td->touches_by_report == 1) { 1061 quirks |= MT_QUIRK_ALWAYS_VALID; 1062 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP; 1063 quirks &= ~MT_QUIRK_VALID_IS_INRANGE; 1064 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE; 1065 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 1066 } 1067 1068 td->mtclass.quirks = quirks; 1069 } 1070 1071 static void mt_post_parse(struct mt_device *td) 1072 { 1073 struct mt_fields *f = td->fields; 1074 struct mt_class *cls = &td->mtclass; 1075 1076 if (td->touches_by_report > 0) { 1077 int field_count_per_touch = f->length / td->touches_by_report; 1078 td->last_slot_field = f->usages[field_count_per_touch - 1]; 1079 } 1080 1081 if (td->cc_index < 0) 1082 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 1083 } 1084 1085 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi) 1086 { 1087 struct mt_device *td = hid_get_drvdata(hdev); 1088 char *name; 1089 const char *suffix = NULL; 1090 struct hid_field *field = hi->report->field[0]; 1091 int ret; 1092 1093 if (hi->report->id == td->mt_report_id) { 1094 ret = mt_touch_input_configured(hdev, hi); 1095 if (ret) 1096 return ret; 1097 } 1098 1099 /* 1100 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN" 1101 * for the stylus. Check this first, and then rely on the application 1102 * field. 1103 */ 1104 if (hi->report->field[0]->physical == HID_DG_STYLUS) { 1105 suffix = "Pen"; 1106 /* force BTN_STYLUS to allow tablet matching in udev */ 1107 __set_bit(BTN_STYLUS, hi->input->keybit); 1108 } else { 1109 switch (field->application) { 1110 case HID_GD_KEYBOARD: 1111 suffix = "Keyboard"; 1112 break; 1113 case HID_GD_KEYPAD: 1114 suffix = "Keypad"; 1115 break; 1116 case HID_GD_MOUSE: 1117 suffix = "Mouse"; 1118 break; 1119 case HID_DG_STYLUS: 1120 suffix = "Pen"; 1121 /* force BTN_STYLUS to allow tablet matching in udev */ 1122 __set_bit(BTN_STYLUS, hi->input->keybit); 1123 break; 1124 case HID_DG_TOUCHSCREEN: 1125 /* we do not set suffix = "Touchscreen" */ 1126 break; 1127 case HID_DG_TOUCHPAD: 1128 suffix = "Touchpad"; 1129 break; 1130 case HID_GD_SYSTEM_CONTROL: 1131 suffix = "System Control"; 1132 break; 1133 case HID_CP_CONSUMER_CONTROL: 1134 suffix = "Consumer Control"; 1135 break; 1136 default: 1137 suffix = "UNKNOWN"; 1138 break; 1139 } 1140 } 1141 1142 if (suffix) { 1143 name = devm_kzalloc(&hi->input->dev, 1144 strlen(hdev->name) + strlen(suffix) + 2, 1145 GFP_KERNEL); 1146 if (name) { 1147 sprintf(name, "%s %s", hdev->name, suffix); 1148 hi->input->name = name; 1149 } 1150 } 1151 1152 return 0; 1153 } 1154 1155 static void mt_fix_const_field(struct hid_field *field, unsigned int usage) 1156 { 1157 if (field->usage[0].hid != usage || 1158 !(field->flags & HID_MAIN_ITEM_CONSTANT)) 1159 return; 1160 1161 field->flags &= ~HID_MAIN_ITEM_CONSTANT; 1162 field->flags |= HID_MAIN_ITEM_VARIABLE; 1163 } 1164 1165 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage) 1166 { 1167 struct hid_report *report; 1168 int i; 1169 1170 list_for_each_entry(report, 1171 &hdev->report_enum[HID_INPUT_REPORT].report_list, 1172 list) { 1173 1174 if (!report->maxfield) 1175 continue; 1176 1177 for (i = 0; i < report->maxfield; i++) 1178 if (report->field[i]->maxusage >= 1) 1179 mt_fix_const_field(report->field[i], usage); 1180 } 1181 } 1182 1183 static void mt_release_contacts(struct hid_device *hid) 1184 { 1185 struct hid_input *hidinput; 1186 struct mt_device *td = hid_get_drvdata(hid); 1187 1188 list_for_each_entry(hidinput, &hid->inputs, list) { 1189 struct input_dev *input_dev = hidinput->input; 1190 struct input_mt *mt = input_dev->mt; 1191 int i; 1192 1193 if (mt) { 1194 for (i = 0; i < mt->num_slots; i++) { 1195 input_mt_slot(input_dev, i); 1196 input_mt_report_slot_state(input_dev, 1197 MT_TOOL_FINGER, 1198 false); 1199 } 1200 input_mt_sync_frame(input_dev); 1201 input_sync(input_dev); 1202 } 1203 } 1204 1205 td->num_received = 0; 1206 } 1207 1208 static void mt_expired_timeout(unsigned long arg) 1209 { 1210 struct hid_device *hdev = (void *)arg; 1211 struct mt_device *td = hid_get_drvdata(hdev); 1212 1213 /* 1214 * An input report came in just before we release the sticky fingers, 1215 * it will take care of the sticky fingers. 1216 */ 1217 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags)) 1218 return; 1219 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags)) 1220 mt_release_contacts(hdev); 1221 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags); 1222 } 1223 1224 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) 1225 { 1226 int ret, i; 1227 struct mt_device *td; 1228 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */ 1229 1230 for (i = 0; mt_classes[i].name ; i++) { 1231 if (id->driver_data == mt_classes[i].name) { 1232 mtclass = &(mt_classes[i]); 1233 break; 1234 } 1235 } 1236 1237 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL); 1238 if (!td) { 1239 dev_err(&hdev->dev, "cannot allocate multitouch data\n"); 1240 return -ENOMEM; 1241 } 1242 td->mtclass = *mtclass; 1243 td->inputmode = -1; 1244 td->maxcontact_report_id = -1; 1245 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN; 1246 td->cc_index = -1; 1247 td->mt_report_id = -1; 1248 hid_set_drvdata(hdev, td); 1249 1250 td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields), 1251 GFP_KERNEL); 1252 if (!td->fields) { 1253 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n"); 1254 return -ENOMEM; 1255 } 1256 1257 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID) 1258 td->serial_maybe = true; 1259 1260 /* 1261 * Store the initial quirk state 1262 */ 1263 td->initial_quirks = hdev->quirks; 1264 1265 /* This allows the driver to correctly support devices 1266 * that emit events over several HID messages. 1267 */ 1268 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; 1269 1270 /* 1271 * This allows the driver to handle different input sensors 1272 * that emits events through different reports on the same HID 1273 * device. 1274 */ 1275 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 1276 hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT; 1277 1278 /* 1279 * Some multitouch screens do not like to be polled for input 1280 * reports. Fortunately, the Win8 spec says that all touches 1281 * should be sent during each report, making the initialization 1282 * of input reports unnecessary. For Win7 devices, well, let's hope 1283 * they will still be happy (this is only be a problem if a touch 1284 * was already there while probing the device). 1285 * 1286 * In addition some touchpads do not behave well if we read 1287 * all feature reports from them. Instead we prevent 1288 * initial report fetching and then selectively fetch each 1289 * report we are interested in. 1290 */ 1291 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 1292 1293 setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev); 1294 1295 ret = hid_parse(hdev); 1296 if (ret != 0) 1297 return ret; 1298 1299 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID) 1300 mt_fix_const_fields(hdev, HID_DG_CONTACTID); 1301 1302 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 1303 if (ret) 1304 return ret; 1305 1306 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group); 1307 if (ret) 1308 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n", 1309 hdev->name); 1310 1311 mt_set_maxcontacts(hdev); 1312 mt_set_input_mode(hdev); 1313 1314 /* release .fields memory as it is not used anymore */ 1315 devm_kfree(&hdev->dev, td->fields); 1316 td->fields = NULL; 1317 1318 return 0; 1319 } 1320 1321 #ifdef CONFIG_PM 1322 static int mt_reset_resume(struct hid_device *hdev) 1323 { 1324 mt_release_contacts(hdev); 1325 mt_set_maxcontacts(hdev); 1326 mt_set_input_mode(hdev); 1327 return 0; 1328 } 1329 1330 static int mt_resume(struct hid_device *hdev) 1331 { 1332 /* Some Elan legacy devices require SET_IDLE to be set on resume. 1333 * It should be safe to send it to other devices too. 1334 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */ 1335 1336 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE); 1337 1338 return 0; 1339 } 1340 #endif 1341 1342 static void mt_remove(struct hid_device *hdev) 1343 { 1344 struct mt_device *td = hid_get_drvdata(hdev); 1345 1346 del_timer_sync(&td->release_timer); 1347 1348 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group); 1349 hid_hw_stop(hdev); 1350 hdev->quirks = td->initial_quirks; 1351 } 1352 1353 /* 1354 * This list contains only: 1355 * - VID/PID of products not working with the default multitouch handling 1356 * - 2 generic rules. 1357 * So there is no point in adding here any device with MT_CLS_DEFAULT. 1358 */ 1359 static const struct hid_device_id mt_devices[] = { 1360 1361 /* 3M panels */ 1362 { .driver_data = MT_CLS_3M, 1363 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1364 USB_DEVICE_ID_3M1968) }, 1365 { .driver_data = MT_CLS_3M, 1366 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1367 USB_DEVICE_ID_3M2256) }, 1368 { .driver_data = MT_CLS_3M, 1369 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1370 USB_DEVICE_ID_3M3266) }, 1371 1372 /* Alps devices */ 1373 { .driver_data = MT_CLS_WIN_8_DUAL, 1374 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 1375 USB_VENDOR_ID_ALPS_JP, 1376 HID_DEVICE_ID_ALPS_U1_DUAL_PTP) }, 1377 { .driver_data = MT_CLS_WIN_8_DUAL, 1378 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 1379 USB_VENDOR_ID_ALPS_JP, 1380 HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) }, 1381 1382 /* Anton devices */ 1383 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS, 1384 MT_USB_DEVICE(USB_VENDOR_ID_ANTON, 1385 USB_DEVICE_ID_ANTON_TOUCH_PAD) }, 1386 1387 /* Atmel panels */ 1388 { .driver_data = MT_CLS_SERIAL, 1389 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL, 1390 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) }, 1391 1392 /* Baanto multitouch devices */ 1393 { .driver_data = MT_CLS_NSMU, 1394 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO, 1395 USB_DEVICE_ID_BAANTO_MT_190W2) }, 1396 1397 /* Cando panels */ 1398 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 1399 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 1400 USB_DEVICE_ID_CANDO_MULTI_TOUCH) }, 1401 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 1402 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 1403 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) }, 1404 1405 /* Chunghwa Telecom touch panels */ 1406 { .driver_data = MT_CLS_NSMU, 1407 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT, 1408 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) }, 1409 1410 /* CJTouch panels */ 1411 { .driver_data = MT_CLS_NSMU, 1412 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH, 1413 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) }, 1414 { .driver_data = MT_CLS_NSMU, 1415 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH, 1416 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) }, 1417 1418 /* CVTouch panels */ 1419 { .driver_data = MT_CLS_NSMU, 1420 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH, 1421 USB_DEVICE_ID_CVTOUCH_SCREEN) }, 1422 1423 /* eGalax devices (resistive) */ 1424 { .driver_data = MT_CLS_EGALAX, 1425 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1426 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) }, 1427 { .driver_data = MT_CLS_EGALAX, 1428 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1429 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) }, 1430 1431 /* eGalax devices (capacitive) */ 1432 { .driver_data = MT_CLS_EGALAX_SERIAL, 1433 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1434 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) }, 1435 { .driver_data = MT_CLS_EGALAX, 1436 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1437 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) }, 1438 { .driver_data = MT_CLS_EGALAX_SERIAL, 1439 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1440 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) }, 1441 { .driver_data = MT_CLS_EGALAX_SERIAL, 1442 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1443 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) }, 1444 { .driver_data = MT_CLS_EGALAX_SERIAL, 1445 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1446 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) }, 1447 { .driver_data = MT_CLS_EGALAX_SERIAL, 1448 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1449 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) }, 1450 { .driver_data = MT_CLS_EGALAX, 1451 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1452 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) }, 1453 { .driver_data = MT_CLS_EGALAX, 1454 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1455 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) }, 1456 { .driver_data = MT_CLS_EGALAX_SERIAL, 1457 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1458 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) }, 1459 { .driver_data = MT_CLS_EGALAX, 1460 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 1461 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) }, 1462 { .driver_data = MT_CLS_EGALAX, 1463 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 1464 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) }, 1465 { .driver_data = MT_CLS_EGALAX, 1466 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1467 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) }, 1468 { .driver_data = MT_CLS_EGALAX, 1469 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1470 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) }, 1471 { .driver_data = MT_CLS_EGALAX_SERIAL, 1472 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1473 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) }, 1474 { .driver_data = MT_CLS_EGALAX_SERIAL, 1475 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1476 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) }, 1477 { .driver_data = MT_CLS_EGALAX_SERIAL, 1478 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1479 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) }, 1480 1481 /* Elitegroup panel */ 1482 { .driver_data = MT_CLS_SERIAL, 1483 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP, 1484 USB_DEVICE_ID_ELITEGROUP_05D8) }, 1485 1486 /* Flatfrog Panels */ 1487 { .driver_data = MT_CLS_FLATFROG, 1488 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG, 1489 USB_DEVICE_ID_MULTITOUCH_3200) }, 1490 1491 /* FocalTech Panels */ 1492 { .driver_data = MT_CLS_SERIAL, 1493 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL, 1494 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) }, 1495 1496 /* GeneralTouch panel */ 1497 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS, 1498 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1499 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) }, 1500 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1501 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1502 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) }, 1503 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS, 1504 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1505 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) }, 1506 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1507 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1508 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) }, 1509 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1510 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1511 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) }, 1512 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1513 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1514 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) }, 1515 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1516 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1517 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) }, 1518 1519 /* Gametel game controller */ 1520 { .driver_data = MT_CLS_NSMU, 1521 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL, 1522 USB_DEVICE_ID_GAMETEL_MT_MODE) }, 1523 1524 /* GoodTouch panels */ 1525 { .driver_data = MT_CLS_NSMU, 1526 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH, 1527 USB_DEVICE_ID_GOODTOUCH_000f) }, 1528 1529 /* Hanvon panels */ 1530 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 1531 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT, 1532 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) }, 1533 1534 /* Ilitek dual touch panel */ 1535 { .driver_data = MT_CLS_NSMU, 1536 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK, 1537 USB_DEVICE_ID_ILITEK_MULTITOUCH) }, 1538 1539 /* LG Melfas panel */ 1540 { .driver_data = MT_CLS_LG, 1541 HID_USB_DEVICE(USB_VENDOR_ID_LG, 1542 USB_DEVICE_ID_LG_MELFAS_MT) }, 1543 1544 /* MosArt panels */ 1545 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 1546 MT_USB_DEVICE(USB_VENDOR_ID_ASUS, 1547 USB_DEVICE_ID_ASUS_T91MT)}, 1548 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 1549 MT_USB_DEVICE(USB_VENDOR_ID_ASUS, 1550 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) }, 1551 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 1552 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX, 1553 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) }, 1554 1555 /* Panasonic panels */ 1556 { .driver_data = MT_CLS_PANASONIC, 1557 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 1558 USB_DEVICE_ID_PANABOARD_UBT780) }, 1559 { .driver_data = MT_CLS_PANASONIC, 1560 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 1561 USB_DEVICE_ID_PANABOARD_UBT880) }, 1562 1563 /* Novatek Panel */ 1564 { .driver_data = MT_CLS_NSMU, 1565 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK, 1566 USB_DEVICE_ID_NOVATEK_PCT) }, 1567 1568 /* Ntrig Panel */ 1569 { .driver_data = MT_CLS_NSMU, 1570 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 1571 USB_VENDOR_ID_NTRIG, 0x1b05) }, 1572 1573 /* PixArt optical touch screen */ 1574 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 1575 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 1576 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) }, 1577 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 1578 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 1579 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) }, 1580 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 1581 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 1582 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) }, 1583 1584 /* PixCir-based panels */ 1585 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 1586 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 1587 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) }, 1588 1589 /* Quanta-based panels */ 1590 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID, 1591 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA, 1592 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) }, 1593 1594 /* Stantum panels */ 1595 { .driver_data = MT_CLS_CONFIDENCE, 1596 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, 1597 USB_DEVICE_ID_MTP_STM)}, 1598 1599 /* TopSeed panels */ 1600 { .driver_data = MT_CLS_TOPSEED, 1601 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, 1602 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) }, 1603 1604 /* Touch International panels */ 1605 { .driver_data = MT_CLS_NSMU, 1606 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL, 1607 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) }, 1608 1609 /* Unitec panels */ 1610 { .driver_data = MT_CLS_NSMU, 1611 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC, 1612 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) }, 1613 { .driver_data = MT_CLS_NSMU, 1614 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC, 1615 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) }, 1616 1617 /* VTL panels */ 1618 { .driver_data = MT_CLS_VTL, 1619 MT_USB_DEVICE(USB_VENDOR_ID_VTL, 1620 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) }, 1621 1622 /* Wistron panels */ 1623 { .driver_data = MT_CLS_NSMU, 1624 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON, 1625 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) }, 1626 1627 /* XAT */ 1628 { .driver_data = MT_CLS_NSMU, 1629 MT_USB_DEVICE(USB_VENDOR_ID_XAT, 1630 USB_DEVICE_ID_XAT_CSR) }, 1631 1632 /* Xiroku */ 1633 { .driver_data = MT_CLS_NSMU, 1634 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1635 USB_DEVICE_ID_XIROKU_SPX) }, 1636 { .driver_data = MT_CLS_NSMU, 1637 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1638 USB_DEVICE_ID_XIROKU_MPX) }, 1639 { .driver_data = MT_CLS_NSMU, 1640 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1641 USB_DEVICE_ID_XIROKU_CSR) }, 1642 { .driver_data = MT_CLS_NSMU, 1643 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1644 USB_DEVICE_ID_XIROKU_SPX1) }, 1645 { .driver_data = MT_CLS_NSMU, 1646 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1647 USB_DEVICE_ID_XIROKU_MPX1) }, 1648 { .driver_data = MT_CLS_NSMU, 1649 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1650 USB_DEVICE_ID_XIROKU_CSR1) }, 1651 { .driver_data = MT_CLS_NSMU, 1652 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1653 USB_DEVICE_ID_XIROKU_SPX2) }, 1654 { .driver_data = MT_CLS_NSMU, 1655 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1656 USB_DEVICE_ID_XIROKU_MPX2) }, 1657 { .driver_data = MT_CLS_NSMU, 1658 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1659 USB_DEVICE_ID_XIROKU_CSR2) }, 1660 1661 /* Google MT devices */ 1662 { .driver_data = MT_CLS_GOOGLE, 1663 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE, 1664 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) }, 1665 1666 /* Generic MT device */ 1667 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) }, 1668 1669 /* Generic Win 8 certified MT device */ 1670 { .driver_data = MT_CLS_WIN_8, 1671 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8, 1672 HID_ANY_ID, HID_ANY_ID) }, 1673 { } 1674 }; 1675 MODULE_DEVICE_TABLE(hid, mt_devices); 1676 1677 static const struct hid_usage_id mt_grabbed_usages[] = { 1678 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, 1679 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} 1680 }; 1681 1682 static struct hid_driver mt_driver = { 1683 .name = "hid-multitouch", 1684 .id_table = mt_devices, 1685 .probe = mt_probe, 1686 .remove = mt_remove, 1687 .input_mapping = mt_input_mapping, 1688 .input_mapped = mt_input_mapped, 1689 .input_configured = mt_input_configured, 1690 .feature_mapping = mt_feature_mapping, 1691 .usage_table = mt_grabbed_usages, 1692 .event = mt_event, 1693 .report = mt_report, 1694 #ifdef CONFIG_PM 1695 .reset_resume = mt_reset_resume, 1696 .resume = mt_resume, 1697 #endif 1698 }; 1699 module_hid_driver(mt_driver); 1700