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 .ident = "Microsoft Surface Go 4", 144 .matches = { 145 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 146 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 4"), 147 }, 148 }, 149 { } 150 }; 151 152 /* 153 * Some convertible use the intel-hid ACPI interface to report SW_TABLET_MODE, 154 * these need to be compared via a DMI based authorization list because some 155 * models have unreliable VGBS return which could cause incorrect 156 * SW_TABLET_MODE report. 157 */ 158 static const struct dmi_system_id dmi_vgbs_allow_list[] = { 159 { 160 .matches = { 161 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 162 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible 15-df0xxx"), 163 }, 164 }, 165 { 166 .matches = { 167 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 168 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go"), 169 }, 170 }, 171 { 172 .matches = { 173 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 174 DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC"), 175 }, 176 }, 177 { } 178 }; 179 180 /* 181 * Some devices, even non convertible ones, can send incorrect SW_TABLET_MODE 182 * reports. Accept such reports only from devices in this list. 183 */ 184 static const struct dmi_system_id dmi_auto_add_switch[] = { 185 { 186 .matches = { 187 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */), 188 }, 189 }, 190 { 191 .matches = { 192 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */), 193 }, 194 }, 195 {} /* Array terminator */ 196 }; 197 198 struct intel_hid_priv { 199 struct input_dev *input_dev; 200 struct input_dev *array; 201 struct input_dev *switches; 202 bool wakeup_mode; 203 }; 204 205 #define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054" 206 207 enum intel_hid_dsm_fn_codes { 208 INTEL_HID_DSM_FN_INVALID, 209 INTEL_HID_DSM_BTNL_FN, 210 INTEL_HID_DSM_HDMM_FN, 211 INTEL_HID_DSM_HDSM_FN, 212 INTEL_HID_DSM_HDEM_FN, 213 INTEL_HID_DSM_BTNS_FN, 214 INTEL_HID_DSM_BTNE_FN, 215 INTEL_HID_DSM_HEBC_V1_FN, 216 INTEL_HID_DSM_VGBS_FN, 217 INTEL_HID_DSM_HEBC_V2_FN, 218 INTEL_HID_DSM_FN_MAX 219 }; 220 221 static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = { 222 NULL, 223 "BTNL", 224 "HDMM", 225 "HDSM", 226 "HDEM", 227 "BTNS", 228 "BTNE", 229 "HEBC", 230 "VGBS", 231 "HEBC" 232 }; 233 234 static unsigned long long intel_hid_dsm_fn_mask; 235 static guid_t intel_dsm_guid; 236 237 static bool intel_hid_execute_method(acpi_handle handle, 238 enum intel_hid_dsm_fn_codes fn_index, 239 unsigned long long arg) 240 { 241 union acpi_object *obj, argv4, req; 242 acpi_status status; 243 char *method_name; 244 245 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 246 fn_index >= INTEL_HID_DSM_FN_MAX) 247 return false; 248 249 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 250 251 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 252 goto skip_dsm_exec; 253 254 /* All methods expects a package with one integer element */ 255 req.type = ACPI_TYPE_INTEGER; 256 req.integer.value = arg; 257 258 argv4.type = ACPI_TYPE_PACKAGE; 259 argv4.package.count = 1; 260 argv4.package.elements = &req; 261 262 obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1, fn_index, &argv4); 263 if (obj) { 264 acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n", 265 fn_index, method_name); 266 ACPI_FREE(obj); 267 return true; 268 } 269 270 skip_dsm_exec: 271 status = acpi_execute_simple_method(handle, method_name, arg); 272 if (ACPI_SUCCESS(status)) 273 return true; 274 275 return false; 276 } 277 278 static bool intel_hid_evaluate_method(acpi_handle handle, 279 enum intel_hid_dsm_fn_codes fn_index, 280 unsigned long long *result) 281 { 282 union acpi_object *obj; 283 acpi_status status; 284 char *method_name; 285 286 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 287 fn_index >= INTEL_HID_DSM_FN_MAX) 288 return false; 289 290 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 291 292 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 293 goto skip_dsm_eval; 294 295 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 296 1, fn_index, 297 NULL, ACPI_TYPE_INTEGER); 298 if (obj) { 299 *result = obj->integer.value; 300 acpi_handle_debug(handle, 301 "Eval DSM Fn code: %d[%s] results: 0x%llx\n", 302 fn_index, method_name, *result); 303 ACPI_FREE(obj); 304 return true; 305 } 306 307 skip_dsm_eval: 308 status = acpi_evaluate_integer(handle, method_name, NULL, result); 309 if (ACPI_SUCCESS(status)) 310 return true; 311 312 return false; 313 } 314 315 static void intel_hid_init_dsm(acpi_handle handle) 316 { 317 union acpi_object *obj; 318 319 guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid); 320 321 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1, 0, NULL, 322 ACPI_TYPE_BUFFER); 323 if (obj) { 324 switch (obj->buffer.length) { 325 default: 326 case 2: 327 intel_hid_dsm_fn_mask = *(u16 *)obj->buffer.pointer; 328 break; 329 case 1: 330 intel_hid_dsm_fn_mask = *obj->buffer.pointer; 331 break; 332 case 0: 333 acpi_handle_warn(handle, "intel_hid_dsm_fn_mask length is zero\n"); 334 intel_hid_dsm_fn_mask = 0; 335 break; 336 } 337 ACPI_FREE(obj); 338 } 339 340 acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n", 341 intel_hid_dsm_fn_mask); 342 } 343 344 static int intel_hid_set_enable(struct device *device, bool enable) 345 { 346 acpi_handle handle = ACPI_HANDLE(device); 347 348 /* Enable|disable features - power button is always enabled */ 349 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN, enable)) { 350 dev_warn(device, "failed to %s hotkeys\n", str_enable_disable(enable)); 351 return -EIO; 352 } 353 354 return 0; 355 } 356 357 static void intel_button_array_enable(struct device *device, bool enable) 358 { 359 struct intel_hid_priv *priv = dev_get_drvdata(device); 360 acpi_handle handle = ACPI_HANDLE(device); 361 unsigned long long button_cap; 362 acpi_status status; 363 364 if (!priv->array) 365 return; 366 367 /* Query supported platform features */ 368 status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap); 369 if (ACPI_FAILURE(status)) { 370 dev_warn(device, "failed to get button capability\n"); 371 return; 372 } 373 374 /* Enable|disable features - power button is always enabled */ 375 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN, 376 enable ? button_cap : 1)) 377 dev_warn(device, "failed to set button capability\n"); 378 } 379 380 static int intel_hid_pm_prepare(struct device *device) 381 { 382 if (device_may_wakeup(device)) { 383 struct intel_hid_priv *priv = dev_get_drvdata(device); 384 385 priv->wakeup_mode = true; 386 } 387 return 0; 388 } 389 390 static void intel_hid_pm_complete(struct device *device) 391 { 392 struct intel_hid_priv *priv = dev_get_drvdata(device); 393 394 priv->wakeup_mode = false; 395 } 396 397 static int intel_hid_pl_suspend_handler(struct device *device) 398 { 399 intel_button_array_enable(device, false); 400 401 if (!pm_suspend_no_platform()) 402 intel_hid_set_enable(device, false); 403 404 return 0; 405 } 406 407 static int intel_hid_pl_resume_handler(struct device *device) 408 { 409 intel_hid_pm_complete(device); 410 411 if (!pm_suspend_no_platform()) 412 intel_hid_set_enable(device, true); 413 414 intel_button_array_enable(device, true); 415 return 0; 416 } 417 418 static const struct dev_pm_ops intel_hid_pl_pm_ops = { 419 .prepare = intel_hid_pm_prepare, 420 .complete = intel_hid_pm_complete, 421 .freeze = intel_hid_pl_suspend_handler, 422 .thaw = intel_hid_pl_resume_handler, 423 .restore = intel_hid_pl_resume_handler, 424 .suspend = intel_hid_pl_suspend_handler, 425 .resume = intel_hid_pl_resume_handler, 426 }; 427 428 static int intel_hid_input_setup(struct platform_device *device) 429 { 430 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 431 int ret; 432 433 priv->input_dev = devm_input_allocate_device(&device->dev); 434 if (!priv->input_dev) 435 return -ENOMEM; 436 437 ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL); 438 if (ret) 439 return ret; 440 441 priv->input_dev->name = "Intel HID events"; 442 priv->input_dev->id.bustype = BUS_HOST; 443 444 return input_register_device(priv->input_dev); 445 } 446 447 static int intel_button_array_input_setup(struct platform_device *device) 448 { 449 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 450 int ret; 451 452 /* Setup input device for 5 button array */ 453 priv->array = devm_input_allocate_device(&device->dev); 454 if (!priv->array) 455 return -ENOMEM; 456 457 ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL); 458 if (ret) 459 return ret; 460 461 priv->array->name = "Intel HID 5 button array"; 462 priv->array->id.bustype = BUS_HOST; 463 464 return input_register_device(priv->array); 465 } 466 467 static int intel_hid_switches_setup(struct platform_device *device) 468 { 469 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 470 471 /* Setup input device for switches */ 472 priv->switches = devm_input_allocate_device(&device->dev); 473 if (!priv->switches) 474 return -ENOMEM; 475 476 __set_bit(EV_SW, priv->switches->evbit); 477 __set_bit(SW_TABLET_MODE, priv->switches->swbit); 478 479 priv->switches->name = "Intel HID switches"; 480 priv->switches->id.bustype = BUS_HOST; 481 return input_register_device(priv->switches); 482 } 483 484 static void report_tablet_mode_state(struct platform_device *device) 485 { 486 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 487 acpi_handle handle = ACPI_HANDLE(&device->dev); 488 unsigned long long vgbs; 489 int m; 490 491 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_VGBS_FN, &vgbs)) 492 return; 493 494 m = !(vgbs & TABLET_MODE_FLAG); 495 input_report_switch(priv->switches, SW_TABLET_MODE, m); 496 input_sync(priv->switches); 497 } 498 499 static bool report_tablet_mode_event(struct input_dev *input_dev, u32 event) 500 { 501 if (!input_dev) 502 return false; 503 504 switch (event) { 505 case 0xcc: 506 input_report_switch(input_dev, SW_TABLET_MODE, 1); 507 input_sync(input_dev); 508 return true; 509 case 0xcd: 510 input_report_switch(input_dev, SW_TABLET_MODE, 0); 511 input_sync(input_dev); 512 return true; 513 default: 514 return false; 515 } 516 } 517 518 static void notify_handler(acpi_handle handle, u32 event, void *context) 519 { 520 struct platform_device *device = context; 521 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 522 unsigned long long ev_index; 523 struct key_entry *ke; 524 int err; 525 526 /* 527 * Some convertible have unreliable VGBS return which could cause incorrect 528 * SW_TABLET_MODE report, in these cases we enable support when receiving 529 * the first event instead of during driver setup. 530 */ 531 if (!priv->switches && enable_sw_tablet_mode == TABLET_SW_AT_EVENT && 532 (event == 0xcc || event == 0xcd)) { 533 dev_info(&device->dev, "switch event received, enable switches supports\n"); 534 err = intel_hid_switches_setup(device); 535 if (err) 536 pr_err("Failed to setup Intel HID switches\n"); 537 } 538 539 if (priv->wakeup_mode) { 540 /* 541 * Needed for wakeup from suspend-to-idle to work on some 542 * platforms that don't expose the 5-button array, but still 543 * send notifies with the power button event code to this 544 * device object on power button actions while suspended. 545 */ 546 if (event == 0xce) 547 goto wakeup; 548 549 /* 550 * Some devices send (duplicate) tablet-mode events when moved 551 * around even though the mode has not changed; and they do this 552 * even when suspended. 553 * Update the switch state in case it changed and then return 554 * without waking up to avoid spurious wakeups. 555 */ 556 if (event == 0xcc || event == 0xcd) { 557 report_tablet_mode_event(priv->switches, event); 558 return; 559 } 560 561 /* Wake up on 5-button array events only. */ 562 if (event == 0xc0 || !priv->array) 563 return; 564 565 ke = sparse_keymap_entry_from_scancode(priv->array, event); 566 if (!ke) { 567 dev_info(&device->dev, "unknown event 0x%x\n", event); 568 return; 569 } 570 571 if (ke->type == KE_IGNORE) 572 return; 573 574 wakeup: 575 pm_wakeup_hard_event(&device->dev); 576 577 return; 578 } 579 580 /* 581 * Needed for suspend to work on some platforms that don't expose 582 * the 5-button array, but still send notifies with power button 583 * event code to this device object on power button actions. 584 * 585 * Report the power button press and release. 586 */ 587 if (!priv->array) { 588 if (event == 0xce) { 589 input_report_key(priv->input_dev, KEY_POWER, 1); 590 input_sync(priv->input_dev); 591 return; 592 } 593 594 if (event == 0xcf) { 595 input_report_key(priv->input_dev, KEY_POWER, 0); 596 input_sync(priv->input_dev); 597 return; 598 } 599 } 600 601 if (report_tablet_mode_event(priv->switches, event)) 602 return; 603 604 /* 0xC0 is for HID events, other values are for 5 button array */ 605 if (event != 0xc0) { 606 if (!priv->array || 607 !sparse_keymap_report_event(priv->array, event, 1, true)) 608 dev_dbg(&device->dev, "unknown event 0x%x\n", event); 609 return; 610 } 611 612 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN, 613 &ev_index)) { 614 dev_warn(&device->dev, "failed to get event index\n"); 615 return; 616 } 617 618 if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true)) 619 dev_dbg(&device->dev, "unknown event index 0x%llx\n", 620 ev_index); 621 } 622 623 static bool button_array_present(struct platform_device *device) 624 { 625 acpi_handle handle = ACPI_HANDLE(&device->dev); 626 unsigned long long event_cap; 627 628 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN, 629 &event_cap)) { 630 /* Check presence of 5 button array or v2 power button */ 631 if (event_cap & 0x60000) 632 return true; 633 } 634 635 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN, 636 &event_cap)) { 637 if (event_cap & 0x20000) 638 return true; 639 } 640 641 if (enable_5_button_array || dmi_check_system(button_array_table)) 642 return true; 643 644 return false; 645 } 646 647 static int intel_hid_probe(struct platform_device *device) 648 { 649 acpi_handle handle = ACPI_HANDLE(&device->dev); 650 unsigned long long mode, dummy; 651 struct intel_hid_priv *priv; 652 acpi_status status; 653 int err; 654 655 intel_hid_init_dsm(handle); 656 657 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) { 658 dev_warn(&device->dev, "failed to read mode\n"); 659 return -ENODEV; 660 } 661 662 if (mode != 0) { 663 /* 664 * This driver only implements "simple" mode. There appear 665 * to be no other modes, but we should be paranoid and check 666 * for compatibility. 667 */ 668 dev_info(&device->dev, "platform is not in simple mode\n"); 669 return -ENODEV; 670 } 671 672 priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL); 673 if (!priv) 674 return -ENOMEM; 675 dev_set_drvdata(&device->dev, priv); 676 677 /* See dual_accel_detect.h for more info on the dual_accel check. */ 678 if (enable_sw_tablet_mode == TABLET_SW_AUTO) { 679 if (dmi_check_system(dmi_vgbs_allow_list)) 680 enable_sw_tablet_mode = TABLET_SW_AT_PROBE; 681 else if (dmi_check_system(dmi_auto_add_switch) && !dual_accel_detect()) 682 enable_sw_tablet_mode = TABLET_SW_AT_EVENT; 683 else 684 enable_sw_tablet_mode = TABLET_SW_OFF; 685 } 686 687 err = intel_hid_input_setup(device); 688 if (err) { 689 pr_err("Failed to setup Intel HID hotkeys\n"); 690 return err; 691 } 692 693 /* Setup 5 button array */ 694 if (button_array_present(device)) { 695 dev_info(&device->dev, "platform supports 5 button array\n"); 696 err = intel_button_array_input_setup(device); 697 if (err) 698 pr_err("Failed to setup Intel 5 button array hotkeys\n"); 699 } 700 701 /* Setup switches for devices that we know VGBS return correctly */ 702 if (enable_sw_tablet_mode == TABLET_SW_AT_PROBE) { 703 dev_info(&device->dev, "platform supports switches\n"); 704 err = intel_hid_switches_setup(device); 705 if (err) 706 pr_err("Failed to setup Intel HID switches\n"); 707 else 708 report_tablet_mode_state(device); 709 } 710 711 status = acpi_install_notify_handler(handle, 712 ACPI_DEVICE_NOTIFY, 713 notify_handler, 714 device); 715 if (ACPI_FAILURE(status)) 716 return -EBUSY; 717 718 err = intel_hid_set_enable(&device->dev, true); 719 if (err) 720 goto err_remove_notify; 721 722 intel_button_array_enable(&device->dev, true); 723 724 /* 725 * Call button load method to enable HID power button 726 * Always do this since it activates events on some devices without 727 * a button array too. 728 */ 729 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN, &dummy)) 730 dev_warn(&device->dev, "failed to enable HID power button\n"); 731 732 device_init_wakeup(&device->dev, true); 733 /* 734 * In order for system wakeup to work, the EC GPE has to be marked as 735 * a wakeup one, so do that here (this setting will persist, but it has 736 * no effect until the wakeup mask is set for the EC GPE). 737 */ 738 acpi_ec_mark_gpe_for_wake(); 739 return 0; 740 741 err_remove_notify: 742 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 743 744 return err; 745 } 746 747 static void intel_hid_remove(struct platform_device *device) 748 { 749 acpi_handle handle = ACPI_HANDLE(&device->dev); 750 751 device_init_wakeup(&device->dev, false); 752 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 753 intel_hid_set_enable(&device->dev, false); 754 intel_button_array_enable(&device->dev, false); 755 } 756 757 static struct platform_driver intel_hid_pl_driver = { 758 .driver = { 759 .name = "intel-hid", 760 .acpi_match_table = intel_hid_ids, 761 .pm = &intel_hid_pl_pm_ops, 762 }, 763 .probe = intel_hid_probe, 764 .remove = intel_hid_remove, 765 }; 766 767 /* 768 * Unfortunately, some laptops provide a _HID="INT33D5" device with 769 * _CID="PNP0C02". This causes the pnpacpi scan driver to claim the 770 * ACPI node, so no platform device will be created. The pnpacpi 771 * driver rejects this device in subsequent processing, so no physical 772 * node is created at all. 773 * 774 * As a workaround until the ACPI core figures out how to handle 775 * this corner case, manually ask the ACPI platform device code to 776 * claim the ACPI node. 777 */ 778 static acpi_status __init 779 check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv) 780 { 781 const struct acpi_device_id *ids = context; 782 struct acpi_device *dev = acpi_fetch_acpi_dev(handle); 783 784 if (dev && acpi_match_device_ids(dev, ids) == 0) 785 if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL))) 786 dev_info(&dev->dev, 787 "intel-hid: created platform device\n"); 788 789 return AE_OK; 790 } 791 792 static int __init intel_hid_init(void) 793 { 794 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 795 ACPI_UINT32_MAX, check_acpi_dev, NULL, 796 (void *)intel_hid_ids, NULL); 797 798 return platform_driver_register(&intel_hid_pl_driver); 799 } 800 module_init(intel_hid_init); 801 802 static void __exit intel_hid_exit(void) 803 { 804 platform_driver_unregister(&intel_hid_pl_driver); 805 } 806 module_exit(intel_hid_exit); 807