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