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