1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Intel HID event & 5 button array driver 4 * 5 * Copyright (C) 2015 Alex Hung <alex.hung@canonical.com> 6 * Copyright (C) 2015 Andrew Lutomirski <luto@kernel.org> 7 */ 8 9 #include <linux/acpi.h> 10 #include <linux/dmi.h> 11 #include <linux/input.h> 12 #include <linux/input/sparse-keymap.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/string_choices.h> 17 #include <linux/suspend.h> 18 #include "../dual_accel_detect.h" 19 20 enum intel_hid_tablet_sw_mode { 21 TABLET_SW_AUTO = -1, 22 TABLET_SW_OFF = 0, 23 TABLET_SW_AT_EVENT, 24 TABLET_SW_AT_PROBE, 25 }; 26 27 static bool enable_5_button_array; 28 module_param(enable_5_button_array, bool, 0444); 29 MODULE_PARM_DESC(enable_5_button_array, 30 "Enable 5 Button Array support. " 31 "If you need this please report this to: platform-driver-x86@vger.kernel.org"); 32 33 static int enable_sw_tablet_mode = TABLET_SW_AUTO; 34 module_param(enable_sw_tablet_mode, int, 0444); 35 MODULE_PARM_DESC(enable_sw_tablet_mode, 36 "Enable SW_TABLET_MODE reporting -1:auto 0:off 1:at-first-event 2:at-probe. " 37 "If you need this please report this to: platform-driver-x86@vger.kernel.org"); 38 39 /* When NOT in tablet mode, VGBS returns with the flag 0x40 */ 40 #define TABLET_MODE_FLAG BIT(6) 41 42 MODULE_DESCRIPTION("Intel HID Event hotkey driver"); 43 MODULE_LICENSE("GPL"); 44 MODULE_AUTHOR("Alex Hung"); 45 46 static const struct acpi_device_id intel_hid_ids[] = { 47 {"INT33D5", 0}, 48 {"INTC1051", 0}, 49 {"INTC1054", 0}, 50 {"INTC1070", 0}, 51 {"INTC1076", 0}, 52 {"INTC1077", 0}, 53 {"INTC1078", 0}, 54 {"INTC107B", 0}, 55 {"INTC10CB", 0}, 56 {"", 0}, 57 }; 58 MODULE_DEVICE_TABLE(acpi, intel_hid_ids); 59 60 /* In theory, these are HID usages. */ 61 static const struct key_entry intel_hid_keymap[] = { 62 /* 1: LSuper (Page 0x07, usage 0xE3) -- unclear what to do */ 63 /* 2: Toggle SW_ROTATE_LOCK -- easy to implement if seen in wild */ 64 { KE_KEY, 3, { KEY_NUMLOCK } }, 65 { KE_KEY, 4, { KEY_HOME } }, 66 { KE_KEY, 5, { KEY_END } }, 67 { KE_KEY, 6, { KEY_PAGEUP } }, 68 { KE_KEY, 7, { KEY_PAGEDOWN } }, 69 { KE_KEY, 8, { KEY_RFKILL } }, 70 { KE_KEY, 9, { KEY_POWER } }, 71 { KE_KEY, 11, { KEY_SLEEP } }, 72 /* 13 has two different meanings in the spec -- ignore it. */ 73 { KE_KEY, 14, { KEY_STOPCD } }, 74 { KE_KEY, 15, { KEY_PLAYPAUSE } }, 75 { KE_KEY, 16, { KEY_MUTE } }, 76 { KE_KEY, 17, { KEY_VOLUMEUP } }, 77 { KE_KEY, 18, { KEY_VOLUMEDOWN } }, 78 { KE_KEY, 19, { KEY_BRIGHTNESSUP } }, 79 { KE_KEY, 20, { KEY_BRIGHTNESSDOWN } }, 80 /* 27: wake -- needs special handling */ 81 { KE_END }, 82 }; 83 84 /* 5 button array notification value. */ 85 static const struct key_entry intel_array_keymap[] = { 86 { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* Press */ 87 { KE_IGNORE, 0xC3, { KEY_LEFTMETA } }, /* Release */ 88 { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* Press */ 89 { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* Release */ 90 { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* Press */ 91 { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* Release */ 92 { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */ 93 { KE_IGNORE, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* Release */ 94 { KE_KEY, 0xCE, { KEY_POWER } }, /* Press */ 95 { KE_IGNORE, 0xCF, { KEY_POWER } }, /* Release */ 96 { KE_END }, 97 }; 98 99 static const struct dmi_system_id button_array_table[] = { 100 { 101 .ident = "Wacom MobileStudio Pro 13", 102 .matches = { 103 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"), 104 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 13"), 105 }, 106 }, 107 { 108 .ident = "Wacom MobileStudio Pro 16", 109 .matches = { 110 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"), 111 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 16"), 112 }, 113 }, 114 { 115 .ident = "HP Spectre x2 (2015)", 116 .matches = { 117 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 118 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable"), 119 }, 120 }, 121 { 122 .ident = "Lenovo ThinkPad X1 Tablet Gen 1", 123 .matches = { 124 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 125 DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X12 Detachable Gen 1"), 126 }, 127 }, 128 { 129 .ident = "Lenovo ThinkPad X1 Tablet Gen 2", 130 .matches = { 131 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 132 DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"), 133 }, 134 }, 135 { 136 .ident = "Microsoft Surface Go 3", 137 .matches = { 138 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 139 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"), 140 }, 141 }, 142 { } 143 }; 144 145 /* 146 * Some convertible use the intel-hid ACPI interface to report SW_TABLET_MODE, 147 * these need to be compared via a DMI based authorization list because some 148 * models have unreliable VGBS return which could cause incorrect 149 * SW_TABLET_MODE report. 150 */ 151 static const struct dmi_system_id dmi_vgbs_allow_list[] = { 152 { 153 .matches = { 154 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 155 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible 15-df0xxx"), 156 }, 157 }, 158 { 159 .matches = { 160 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 161 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go"), 162 }, 163 }, 164 { 165 .matches = { 166 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 167 DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC"), 168 }, 169 }, 170 { } 171 }; 172 173 /* 174 * Some devices, even non convertible ones, can send incorrect SW_TABLET_MODE 175 * reports. Accept such reports only from devices in this list. 176 */ 177 static const struct dmi_system_id dmi_auto_add_switch[] = { 178 { 179 .matches = { 180 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */), 181 }, 182 }, 183 { 184 .matches = { 185 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */), 186 }, 187 }, 188 {} /* Array terminator */ 189 }; 190 191 struct intel_hid_priv { 192 struct input_dev *input_dev; 193 struct input_dev *array; 194 struct input_dev *switches; 195 bool wakeup_mode; 196 }; 197 198 #define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054" 199 200 enum intel_hid_dsm_fn_codes { 201 INTEL_HID_DSM_FN_INVALID, 202 INTEL_HID_DSM_BTNL_FN, 203 INTEL_HID_DSM_HDMM_FN, 204 INTEL_HID_DSM_HDSM_FN, 205 INTEL_HID_DSM_HDEM_FN, 206 INTEL_HID_DSM_BTNS_FN, 207 INTEL_HID_DSM_BTNE_FN, 208 INTEL_HID_DSM_HEBC_V1_FN, 209 INTEL_HID_DSM_VGBS_FN, 210 INTEL_HID_DSM_HEBC_V2_FN, 211 INTEL_HID_DSM_FN_MAX 212 }; 213 214 static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = { 215 NULL, 216 "BTNL", 217 "HDMM", 218 "HDSM", 219 "HDEM", 220 "BTNS", 221 "BTNE", 222 "HEBC", 223 "VGBS", 224 "HEBC" 225 }; 226 227 static unsigned long long intel_hid_dsm_fn_mask; 228 static guid_t intel_dsm_guid; 229 230 static bool intel_hid_execute_method(acpi_handle handle, 231 enum intel_hid_dsm_fn_codes fn_index, 232 unsigned long long arg) 233 { 234 union acpi_object *obj, argv4, req; 235 acpi_status status; 236 char *method_name; 237 238 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 239 fn_index >= INTEL_HID_DSM_FN_MAX) 240 return false; 241 242 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 243 244 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 245 goto skip_dsm_exec; 246 247 /* All methods expects a package with one integer element */ 248 req.type = ACPI_TYPE_INTEGER; 249 req.integer.value = arg; 250 251 argv4.type = ACPI_TYPE_PACKAGE; 252 argv4.package.count = 1; 253 argv4.package.elements = &req; 254 255 obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1, fn_index, &argv4); 256 if (obj) { 257 acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n", 258 fn_index, method_name); 259 ACPI_FREE(obj); 260 return true; 261 } 262 263 skip_dsm_exec: 264 status = acpi_execute_simple_method(handle, method_name, arg); 265 if (ACPI_SUCCESS(status)) 266 return true; 267 268 return false; 269 } 270 271 static bool intel_hid_evaluate_method(acpi_handle handle, 272 enum intel_hid_dsm_fn_codes fn_index, 273 unsigned long long *result) 274 { 275 union acpi_object *obj; 276 acpi_status status; 277 char *method_name; 278 279 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 280 fn_index >= INTEL_HID_DSM_FN_MAX) 281 return false; 282 283 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 284 285 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 286 goto skip_dsm_eval; 287 288 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 289 1, fn_index, 290 NULL, ACPI_TYPE_INTEGER); 291 if (obj) { 292 *result = obj->integer.value; 293 acpi_handle_debug(handle, 294 "Eval DSM Fn code: %d[%s] results: 0x%llx\n", 295 fn_index, method_name, *result); 296 ACPI_FREE(obj); 297 return true; 298 } 299 300 skip_dsm_eval: 301 status = acpi_evaluate_integer(handle, method_name, NULL, result); 302 if (ACPI_SUCCESS(status)) 303 return true; 304 305 return false; 306 } 307 308 static void intel_hid_init_dsm(acpi_handle handle) 309 { 310 union acpi_object *obj; 311 312 guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid); 313 314 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1, 0, NULL, 315 ACPI_TYPE_BUFFER); 316 if (obj) { 317 switch (obj->buffer.length) { 318 default: 319 case 2: 320 intel_hid_dsm_fn_mask = *(u16 *)obj->buffer.pointer; 321 break; 322 case 1: 323 intel_hid_dsm_fn_mask = *obj->buffer.pointer; 324 break; 325 case 0: 326 acpi_handle_warn(handle, "intel_hid_dsm_fn_mask length is zero\n"); 327 intel_hid_dsm_fn_mask = 0; 328 break; 329 } 330 ACPI_FREE(obj); 331 } 332 333 acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n", 334 intel_hid_dsm_fn_mask); 335 } 336 337 static int intel_hid_set_enable(struct device *device, bool enable) 338 { 339 acpi_handle handle = ACPI_HANDLE(device); 340 341 /* Enable|disable features - power button is always enabled */ 342 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN, enable)) { 343 dev_warn(device, "failed to %s hotkeys\n", str_enable_disable(enable)); 344 return -EIO; 345 } 346 347 return 0; 348 } 349 350 static void intel_button_array_enable(struct device *device, bool enable) 351 { 352 struct intel_hid_priv *priv = dev_get_drvdata(device); 353 acpi_handle handle = ACPI_HANDLE(device); 354 unsigned long long button_cap; 355 acpi_status status; 356 357 if (!priv->array) 358 return; 359 360 /* Query supported platform features */ 361 status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap); 362 if (ACPI_FAILURE(status)) { 363 dev_warn(device, "failed to get button capability\n"); 364 return; 365 } 366 367 /* Enable|disable features - power button is always enabled */ 368 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN, 369 enable ? button_cap : 1)) 370 dev_warn(device, "failed to set button capability\n"); 371 } 372 373 static int intel_hid_pm_prepare(struct device *device) 374 { 375 if (device_may_wakeup(device)) { 376 struct intel_hid_priv *priv = dev_get_drvdata(device); 377 378 priv->wakeup_mode = true; 379 } 380 return 0; 381 } 382 383 static void intel_hid_pm_complete(struct device *device) 384 { 385 struct intel_hid_priv *priv = dev_get_drvdata(device); 386 387 priv->wakeup_mode = false; 388 } 389 390 static int intel_hid_pl_suspend_handler(struct device *device) 391 { 392 intel_button_array_enable(device, false); 393 394 if (!pm_suspend_no_platform()) 395 intel_hid_set_enable(device, false); 396 397 return 0; 398 } 399 400 static int intel_hid_pl_resume_handler(struct device *device) 401 { 402 intel_hid_pm_complete(device); 403 404 if (!pm_suspend_no_platform()) 405 intel_hid_set_enable(device, true); 406 407 intel_button_array_enable(device, true); 408 return 0; 409 } 410 411 static const struct dev_pm_ops intel_hid_pl_pm_ops = { 412 .prepare = intel_hid_pm_prepare, 413 .complete = intel_hid_pm_complete, 414 .freeze = intel_hid_pl_suspend_handler, 415 .thaw = intel_hid_pl_resume_handler, 416 .restore = intel_hid_pl_resume_handler, 417 .suspend = intel_hid_pl_suspend_handler, 418 .resume = intel_hid_pl_resume_handler, 419 }; 420 421 static int intel_hid_input_setup(struct platform_device *device) 422 { 423 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 424 int ret; 425 426 priv->input_dev = devm_input_allocate_device(&device->dev); 427 if (!priv->input_dev) 428 return -ENOMEM; 429 430 ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL); 431 if (ret) 432 return ret; 433 434 priv->input_dev->name = "Intel HID events"; 435 priv->input_dev->id.bustype = BUS_HOST; 436 437 return input_register_device(priv->input_dev); 438 } 439 440 static int intel_button_array_input_setup(struct platform_device *device) 441 { 442 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 443 int ret; 444 445 /* Setup input device for 5 button array */ 446 priv->array = devm_input_allocate_device(&device->dev); 447 if (!priv->array) 448 return -ENOMEM; 449 450 ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL); 451 if (ret) 452 return ret; 453 454 priv->array->name = "Intel HID 5 button array"; 455 priv->array->id.bustype = BUS_HOST; 456 457 return input_register_device(priv->array); 458 } 459 460 static int intel_hid_switches_setup(struct platform_device *device) 461 { 462 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 463 464 /* Setup input device for switches */ 465 priv->switches = devm_input_allocate_device(&device->dev); 466 if (!priv->switches) 467 return -ENOMEM; 468 469 __set_bit(EV_SW, priv->switches->evbit); 470 __set_bit(SW_TABLET_MODE, priv->switches->swbit); 471 472 priv->switches->name = "Intel HID switches"; 473 priv->switches->id.bustype = BUS_HOST; 474 return input_register_device(priv->switches); 475 } 476 477 static void report_tablet_mode_state(struct platform_device *device) 478 { 479 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 480 acpi_handle handle = ACPI_HANDLE(&device->dev); 481 unsigned long long vgbs; 482 int m; 483 484 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_VGBS_FN, &vgbs)) 485 return; 486 487 m = !(vgbs & TABLET_MODE_FLAG); 488 input_report_switch(priv->switches, SW_TABLET_MODE, m); 489 input_sync(priv->switches); 490 } 491 492 static bool report_tablet_mode_event(struct input_dev *input_dev, u32 event) 493 { 494 if (!input_dev) 495 return false; 496 497 switch (event) { 498 case 0xcc: 499 input_report_switch(input_dev, SW_TABLET_MODE, 1); 500 input_sync(input_dev); 501 return true; 502 case 0xcd: 503 input_report_switch(input_dev, SW_TABLET_MODE, 0); 504 input_sync(input_dev); 505 return true; 506 default: 507 return false; 508 } 509 } 510 511 static void notify_handler(acpi_handle handle, u32 event, void *context) 512 { 513 struct platform_device *device = context; 514 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 515 unsigned long long ev_index; 516 struct key_entry *ke; 517 int err; 518 519 /* 520 * Some convertible have unreliable VGBS return which could cause incorrect 521 * SW_TABLET_MODE report, in these cases we enable support when receiving 522 * the first event instead of during driver setup. 523 */ 524 if (!priv->switches && enable_sw_tablet_mode == TABLET_SW_AT_EVENT && 525 (event == 0xcc || event == 0xcd)) { 526 dev_info(&device->dev, "switch event received, enable switches supports\n"); 527 err = intel_hid_switches_setup(device); 528 if (err) 529 pr_err("Failed to setup Intel HID switches\n"); 530 } 531 532 if (priv->wakeup_mode) { 533 /* 534 * Needed for wakeup from suspend-to-idle to work on some 535 * platforms that don't expose the 5-button array, but still 536 * send notifies with the power button event code to this 537 * device object on power button actions while suspended. 538 */ 539 if (event == 0xce) 540 goto wakeup; 541 542 /* 543 * Some devices send (duplicate) tablet-mode events when moved 544 * around even though the mode has not changed; and they do this 545 * even when suspended. 546 * Update the switch state in case it changed and then return 547 * without waking up to avoid spurious wakeups. 548 */ 549 if (event == 0xcc || event == 0xcd) { 550 report_tablet_mode_event(priv->switches, event); 551 return; 552 } 553 554 /* Wake up on 5-button array events only. */ 555 if (event == 0xc0 || !priv->array) 556 return; 557 558 ke = sparse_keymap_entry_from_scancode(priv->array, event); 559 if (!ke) { 560 dev_info(&device->dev, "unknown event 0x%x\n", event); 561 return; 562 } 563 564 if (ke->type == KE_IGNORE) 565 return; 566 567 wakeup: 568 pm_wakeup_hard_event(&device->dev); 569 570 return; 571 } 572 573 /* 574 * Needed for suspend to work on some platforms that don't expose 575 * the 5-button array, but still send notifies with power button 576 * event code to this device object on power button actions. 577 * 578 * Report the power button press and release. 579 */ 580 if (!priv->array) { 581 if (event == 0xce) { 582 input_report_key(priv->input_dev, KEY_POWER, 1); 583 input_sync(priv->input_dev); 584 return; 585 } 586 587 if (event == 0xcf) { 588 input_report_key(priv->input_dev, KEY_POWER, 0); 589 input_sync(priv->input_dev); 590 return; 591 } 592 } 593 594 if (report_tablet_mode_event(priv->switches, event)) 595 return; 596 597 /* 0xC0 is for HID events, other values are for 5 button array */ 598 if (event != 0xc0) { 599 if (!priv->array || 600 !sparse_keymap_report_event(priv->array, event, 1, true)) 601 dev_dbg(&device->dev, "unknown event 0x%x\n", event); 602 return; 603 } 604 605 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN, 606 &ev_index)) { 607 dev_warn(&device->dev, "failed to get event index\n"); 608 return; 609 } 610 611 if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true)) 612 dev_dbg(&device->dev, "unknown event index 0x%llx\n", 613 ev_index); 614 } 615 616 static bool button_array_present(struct platform_device *device) 617 { 618 acpi_handle handle = ACPI_HANDLE(&device->dev); 619 unsigned long long event_cap; 620 621 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN, 622 &event_cap)) { 623 /* Check presence of 5 button array or v2 power button */ 624 if (event_cap & 0x60000) 625 return true; 626 } 627 628 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN, 629 &event_cap)) { 630 if (event_cap & 0x20000) 631 return true; 632 } 633 634 if (enable_5_button_array || dmi_check_system(button_array_table)) 635 return true; 636 637 return false; 638 } 639 640 static int intel_hid_probe(struct platform_device *device) 641 { 642 acpi_handle handle = ACPI_HANDLE(&device->dev); 643 unsigned long long mode, dummy; 644 struct intel_hid_priv *priv; 645 acpi_status status; 646 int err; 647 648 intel_hid_init_dsm(handle); 649 650 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) { 651 dev_warn(&device->dev, "failed to read mode\n"); 652 return -ENODEV; 653 } 654 655 if (mode != 0) { 656 /* 657 * This driver only implements "simple" mode. There appear 658 * to be no other modes, but we should be paranoid and check 659 * for compatibility. 660 */ 661 dev_info(&device->dev, "platform is not in simple mode\n"); 662 return -ENODEV; 663 } 664 665 priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL); 666 if (!priv) 667 return -ENOMEM; 668 dev_set_drvdata(&device->dev, priv); 669 670 /* See dual_accel_detect.h for more info on the dual_accel check. */ 671 if (enable_sw_tablet_mode == TABLET_SW_AUTO) { 672 if (dmi_check_system(dmi_vgbs_allow_list)) 673 enable_sw_tablet_mode = TABLET_SW_AT_PROBE; 674 else if (dmi_check_system(dmi_auto_add_switch) && !dual_accel_detect()) 675 enable_sw_tablet_mode = TABLET_SW_AT_EVENT; 676 else 677 enable_sw_tablet_mode = TABLET_SW_OFF; 678 } 679 680 err = intel_hid_input_setup(device); 681 if (err) { 682 pr_err("Failed to setup Intel HID hotkeys\n"); 683 return err; 684 } 685 686 /* Setup 5 button array */ 687 if (button_array_present(device)) { 688 dev_info(&device->dev, "platform supports 5 button array\n"); 689 err = intel_button_array_input_setup(device); 690 if (err) 691 pr_err("Failed to setup Intel 5 button array hotkeys\n"); 692 } 693 694 /* Setup switches for devices that we know VGBS return correctly */ 695 if (enable_sw_tablet_mode == TABLET_SW_AT_PROBE) { 696 dev_info(&device->dev, "platform supports switches\n"); 697 err = intel_hid_switches_setup(device); 698 if (err) 699 pr_err("Failed to setup Intel HID switches\n"); 700 else 701 report_tablet_mode_state(device); 702 } 703 704 status = acpi_install_notify_handler(handle, 705 ACPI_DEVICE_NOTIFY, 706 notify_handler, 707 device); 708 if (ACPI_FAILURE(status)) 709 return -EBUSY; 710 711 err = intel_hid_set_enable(&device->dev, true); 712 if (err) 713 goto err_remove_notify; 714 715 intel_button_array_enable(&device->dev, true); 716 717 /* 718 * Call button load method to enable HID power button 719 * Always do this since it activates events on some devices without 720 * a button array too. 721 */ 722 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN, &dummy)) 723 dev_warn(&device->dev, "failed to enable HID power button\n"); 724 725 device_init_wakeup(&device->dev, true); 726 /* 727 * In order for system wakeup to work, the EC GPE has to be marked as 728 * a wakeup one, so do that here (this setting will persist, but it has 729 * no effect until the wakeup mask is set for the EC GPE). 730 */ 731 acpi_ec_mark_gpe_for_wake(); 732 return 0; 733 734 err_remove_notify: 735 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 736 737 return err; 738 } 739 740 static void intel_hid_remove(struct platform_device *device) 741 { 742 acpi_handle handle = ACPI_HANDLE(&device->dev); 743 744 device_init_wakeup(&device->dev, false); 745 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 746 intel_hid_set_enable(&device->dev, false); 747 intel_button_array_enable(&device->dev, false); 748 } 749 750 static struct platform_driver intel_hid_pl_driver = { 751 .driver = { 752 .name = "intel-hid", 753 .acpi_match_table = intel_hid_ids, 754 .pm = &intel_hid_pl_pm_ops, 755 }, 756 .probe = intel_hid_probe, 757 .remove = intel_hid_remove, 758 }; 759 760 /* 761 * Unfortunately, some laptops provide a _HID="INT33D5" device with 762 * _CID="PNP0C02". This causes the pnpacpi scan driver to claim the 763 * ACPI node, so no platform device will be created. The pnpacpi 764 * driver rejects this device in subsequent processing, so no physical 765 * node is created at all. 766 * 767 * As a workaround until the ACPI core figures out how to handle 768 * this corner case, manually ask the ACPI platform device code to 769 * claim the ACPI node. 770 */ 771 static acpi_status __init 772 check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv) 773 { 774 const struct acpi_device_id *ids = context; 775 struct acpi_device *dev = acpi_fetch_acpi_dev(handle); 776 777 if (dev && acpi_match_device_ids(dev, ids) == 0) 778 if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL))) 779 dev_info(&dev->dev, 780 "intel-hid: created platform device\n"); 781 782 return AE_OK; 783 } 784 785 static int __init intel_hid_init(void) 786 { 787 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 788 ACPI_UINT32_MAX, check_acpi_dev, NULL, 789 (void *)intel_hid_ids, NULL); 790 791 return platform_driver_register(&intel_hid_pl_driver); 792 } 793 module_init(intel_hid_init); 794 795 static void __exit intel_hid_exit(void) 796 { 797 platform_driver_unregister(&intel_hid_pl_driver); 798 } 799 module_exit(intel_hid_exit); 800