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" }, 48 { "INTC1051" }, 49 { "INTC1054" }, 50 { "INTC1070" }, 51 { "INTC1076" }, 52 { "INTC1077" }, 53 { "INTC1078" }, 54 { "INTC107B" }, 55 { "INTC10CB" }, 56 { "INTC10CC" }, 57 { "INTC10F1" }, 58 { "INTC10F2" }, 59 { } 60 }; 61 MODULE_DEVICE_TABLE(acpi, intel_hid_ids); 62 63 /* In theory, these are HID usages. */ 64 static const struct key_entry intel_hid_keymap[] = { 65 /* 1: LSuper (Page 0x07, usage 0xE3) -- unclear what to do */ 66 /* 2: Toggle SW_ROTATE_LOCK -- easy to implement if seen in wild */ 67 { KE_KEY, 3, { KEY_NUMLOCK } }, 68 { KE_KEY, 4, { KEY_HOME } }, 69 { KE_KEY, 5, { KEY_END } }, 70 { KE_KEY, 6, { KEY_PAGEUP } }, 71 { KE_KEY, 7, { KEY_PAGEDOWN } }, 72 { KE_KEY, 8, { KEY_RFKILL } }, 73 { KE_KEY, 9, { KEY_POWER } }, 74 { KE_KEY, 11, { KEY_SLEEP } }, 75 /* 13 has two different meanings in the spec -- ignore it. */ 76 { KE_KEY, 14, { KEY_STOPCD } }, 77 { KE_KEY, 15, { KEY_PLAYPAUSE } }, 78 { KE_KEY, 16, { KEY_MUTE } }, 79 { KE_KEY, 17, { KEY_VOLUMEUP } }, 80 { KE_KEY, 18, { KEY_VOLUMEDOWN } }, 81 { KE_KEY, 19, { KEY_BRIGHTNESSUP } }, 82 { KE_KEY, 20, { KEY_BRIGHTNESSDOWN } }, 83 /* 27: wake -- needs special handling */ 84 { KE_END }, 85 }; 86 87 /* 5 button array notification value. */ 88 static const struct key_entry intel_array_keymap[] = { 89 { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* Press */ 90 { KE_IGNORE, 0xC3, { KEY_LEFTMETA } }, /* Release */ 91 { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* Press */ 92 { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* Release */ 93 { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* Press */ 94 { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* Release */ 95 { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */ 96 { KE_IGNORE, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* Release */ 97 { KE_KEY, 0xCE, { KEY_POWER } }, /* Press */ 98 { KE_IGNORE, 0xCF, { KEY_POWER } }, /* Release */ 99 { KE_END }, 100 }; 101 102 static const struct dmi_system_id button_array_table[] = { 103 { 104 .ident = "Wacom MobileStudio Pro 13", 105 .matches = { 106 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"), 107 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 13"), 108 }, 109 }, 110 { 111 .ident = "Wacom MobileStudio Pro 16", 112 .matches = { 113 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"), 114 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 16"), 115 }, 116 }, 117 { 118 .ident = "HP Spectre x2 (2015)", 119 .matches = { 120 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 121 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable"), 122 }, 123 }, 124 { 125 .ident = "Lenovo ThinkPad X1 Tablet Gen 1", 126 .matches = { 127 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 128 DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X12 Detachable Gen 1"), 129 }, 130 }, 131 { 132 .ident = "Lenovo ThinkPad X1 Tablet Gen 2", 133 .matches = { 134 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 135 DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"), 136 }, 137 }, 138 { 139 .ident = "Microsoft Surface Go 3", 140 .matches = { 141 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 142 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"), 143 }, 144 }, 145 { 146 .ident = "Microsoft Surface Go 4", 147 .matches = { 148 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 149 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 4"), 150 }, 151 }, 152 { } 153 }; 154 155 /* 156 * Some convertible use the intel-hid ACPI interface to report SW_TABLET_MODE, 157 * these need to be compared via a DMI based authorization list because some 158 * models have unreliable VGBS return which could cause incorrect 159 * SW_TABLET_MODE report. 160 */ 161 static const struct dmi_system_id dmi_vgbs_allow_list[] = { 162 { 163 .matches = { 164 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 165 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible 15-df0xxx"), 166 }, 167 }, 168 { 169 .matches = { 170 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), 171 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go"), 172 }, 173 }, 174 { 175 .matches = { 176 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 177 DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC"), 178 }, 179 }, 180 { } 181 }; 182 183 /* 184 * Some devices, even non convertible ones, can send incorrect SW_TABLET_MODE 185 * reports. Accept such reports only from devices in this list. 186 */ 187 static const struct dmi_system_id dmi_auto_add_switch[] = { 188 { 189 .matches = { 190 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */), 191 }, 192 }, 193 { 194 .matches = { 195 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */), 196 }, 197 }, 198 {} /* Array terminator */ 199 }; 200 201 struct intel_hid_priv { 202 struct input_dev *input_dev; 203 struct input_dev *array; 204 struct input_dev *switches; 205 bool wakeup_mode; 206 }; 207 208 #define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054" 209 210 enum intel_hid_dsm_fn_codes { 211 INTEL_HID_DSM_FN_INVALID, 212 INTEL_HID_DSM_BTNL_FN, 213 INTEL_HID_DSM_HDMM_FN, 214 INTEL_HID_DSM_HDSM_FN, 215 INTEL_HID_DSM_HDEM_FN, 216 INTEL_HID_DSM_BTNS_FN, 217 INTEL_HID_DSM_BTNE_FN, 218 INTEL_HID_DSM_HEBC_V1_FN, 219 INTEL_HID_DSM_VGBS_FN, 220 INTEL_HID_DSM_HEBC_V2_FN, 221 INTEL_HID_DSM_FN_MAX 222 }; 223 224 static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = { 225 NULL, 226 "BTNL", 227 "HDMM", 228 "HDSM", 229 "HDEM", 230 "BTNS", 231 "BTNE", 232 "HEBC", 233 "VGBS", 234 "HEBC" 235 }; 236 237 static unsigned long long intel_hid_dsm_fn_mask; 238 static guid_t intel_dsm_guid; 239 240 static bool intel_hid_execute_method(acpi_handle handle, 241 enum intel_hid_dsm_fn_codes fn_index, 242 unsigned long long arg) 243 { 244 union acpi_object *obj, argv4, req; 245 acpi_status status; 246 char *method_name; 247 248 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 249 fn_index >= INTEL_HID_DSM_FN_MAX) 250 return false; 251 252 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 253 254 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 255 goto skip_dsm_exec; 256 257 /* All methods expects a package with one integer element */ 258 req.type = ACPI_TYPE_INTEGER; 259 req.integer.value = arg; 260 261 argv4.type = ACPI_TYPE_PACKAGE; 262 argv4.package.count = 1; 263 argv4.package.elements = &req; 264 265 obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1, fn_index, &argv4); 266 if (obj) { 267 acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n", 268 fn_index, method_name); 269 ACPI_FREE(obj); 270 return true; 271 } 272 273 skip_dsm_exec: 274 status = acpi_execute_simple_method(handle, method_name, arg); 275 if (ACPI_SUCCESS(status)) 276 return true; 277 278 return false; 279 } 280 281 static bool intel_hid_evaluate_method(acpi_handle handle, 282 enum intel_hid_dsm_fn_codes fn_index, 283 unsigned long long *result) 284 { 285 union acpi_object *obj; 286 acpi_status status; 287 char *method_name; 288 289 if (fn_index <= INTEL_HID_DSM_FN_INVALID || 290 fn_index >= INTEL_HID_DSM_FN_MAX) 291 return false; 292 293 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index]; 294 295 if (!(intel_hid_dsm_fn_mask & BIT(fn_index))) 296 goto skip_dsm_eval; 297 298 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 299 1, fn_index, 300 NULL, ACPI_TYPE_INTEGER); 301 if (obj) { 302 *result = obj->integer.value; 303 acpi_handle_debug(handle, 304 "Eval DSM Fn code: %d[%s] results: 0x%llx\n", 305 fn_index, method_name, *result); 306 ACPI_FREE(obj); 307 return true; 308 } 309 310 skip_dsm_eval: 311 status = acpi_evaluate_integer(handle, method_name, NULL, result); 312 if (ACPI_SUCCESS(status)) 313 return true; 314 315 return false; 316 } 317 318 static void intel_hid_init_dsm(acpi_handle handle) 319 { 320 union acpi_object *obj; 321 322 guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid); 323 324 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1, 0, NULL, 325 ACPI_TYPE_BUFFER); 326 if (obj) { 327 switch (obj->buffer.length) { 328 default: 329 case 2: 330 intel_hid_dsm_fn_mask = *(u16 *)obj->buffer.pointer; 331 break; 332 case 1: 333 intel_hid_dsm_fn_mask = *obj->buffer.pointer; 334 break; 335 case 0: 336 acpi_handle_warn(handle, "intel_hid_dsm_fn_mask length is zero\n"); 337 intel_hid_dsm_fn_mask = 0; 338 break; 339 } 340 ACPI_FREE(obj); 341 } 342 343 acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n", 344 intel_hid_dsm_fn_mask); 345 } 346 347 static int intel_hid_set_enable(struct device *device, bool enable) 348 { 349 acpi_handle handle = ACPI_HANDLE(device); 350 351 /* Enable|disable features - power button is always enabled */ 352 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN, enable)) { 353 dev_warn(device, "failed to %s hotkeys\n", str_enable_disable(enable)); 354 return -EIO; 355 } 356 357 return 0; 358 } 359 360 static void intel_button_array_enable(struct device *device, bool enable) 361 { 362 struct intel_hid_priv *priv = dev_get_drvdata(device); 363 acpi_handle handle = ACPI_HANDLE(device); 364 unsigned long long button_cap; 365 acpi_status status; 366 367 if (!priv->array) 368 return; 369 370 /* Query supported platform features */ 371 status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap); 372 if (ACPI_FAILURE(status)) { 373 dev_warn(device, "failed to get button capability\n"); 374 return; 375 } 376 377 /* Enable|disable features - power button is always enabled */ 378 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN, 379 enable ? button_cap : 1)) 380 dev_warn(device, "failed to set button capability\n"); 381 } 382 383 static int intel_hid_pm_prepare(struct device *device) 384 { 385 if (device_may_wakeup(device)) { 386 struct intel_hid_priv *priv = dev_get_drvdata(device); 387 388 priv->wakeup_mode = true; 389 } 390 return 0; 391 } 392 393 static void intel_hid_pm_complete(struct device *device) 394 { 395 struct intel_hid_priv *priv = dev_get_drvdata(device); 396 397 priv->wakeup_mode = false; 398 } 399 400 static int intel_hid_pl_suspend_handler(struct device *device) 401 { 402 intel_button_array_enable(device, false); 403 404 if (!pm_suspend_no_platform()) 405 intel_hid_set_enable(device, false); 406 407 return 0; 408 } 409 410 static int intel_hid_pl_resume_handler(struct device *device) 411 { 412 intel_hid_pm_complete(device); 413 414 if (!pm_suspend_no_platform()) 415 intel_hid_set_enable(device, true); 416 417 intel_button_array_enable(device, true); 418 return 0; 419 } 420 421 static const struct dev_pm_ops intel_hid_pl_pm_ops = { 422 .prepare = intel_hid_pm_prepare, 423 .complete = intel_hid_pm_complete, 424 .freeze = intel_hid_pl_suspend_handler, 425 .thaw = intel_hid_pl_resume_handler, 426 .restore = intel_hid_pl_resume_handler, 427 .suspend = intel_hid_pl_suspend_handler, 428 .resume = intel_hid_pl_resume_handler, 429 }; 430 431 static int intel_hid_input_setup(struct platform_device *device) 432 { 433 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 434 int ret; 435 436 priv->input_dev = devm_input_allocate_device(&device->dev); 437 if (!priv->input_dev) 438 return -ENOMEM; 439 440 ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL); 441 if (ret) 442 return ret; 443 444 priv->input_dev->name = "Intel HID events"; 445 priv->input_dev->id.bustype = BUS_HOST; 446 447 return input_register_device(priv->input_dev); 448 } 449 450 static int intel_button_array_input_setup(struct platform_device *device) 451 { 452 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 453 int ret; 454 455 /* Setup input device for 5 button array */ 456 priv->array = devm_input_allocate_device(&device->dev); 457 if (!priv->array) 458 return -ENOMEM; 459 460 ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL); 461 if (ret) 462 return ret; 463 464 priv->array->name = "Intel HID 5 button array"; 465 priv->array->id.bustype = BUS_HOST; 466 467 return input_register_device(priv->array); 468 } 469 470 static int intel_hid_switches_setup(struct platform_device *device) 471 { 472 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 473 474 /* Setup input device for switches */ 475 priv->switches = devm_input_allocate_device(&device->dev); 476 if (!priv->switches) 477 return -ENOMEM; 478 479 __set_bit(EV_SW, priv->switches->evbit); 480 __set_bit(SW_TABLET_MODE, priv->switches->swbit); 481 482 priv->switches->name = "Intel HID switches"; 483 priv->switches->id.bustype = BUS_HOST; 484 return input_register_device(priv->switches); 485 } 486 487 static void report_tablet_mode_state(struct platform_device *device) 488 { 489 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 490 acpi_handle handle = ACPI_HANDLE(&device->dev); 491 unsigned long long vgbs; 492 int m; 493 494 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_VGBS_FN, &vgbs)) 495 return; 496 497 m = !(vgbs & TABLET_MODE_FLAG); 498 input_report_switch(priv->switches, SW_TABLET_MODE, m); 499 input_sync(priv->switches); 500 } 501 502 static bool report_tablet_mode_event(struct input_dev *input_dev, u32 event) 503 { 504 if (!input_dev) 505 return false; 506 507 switch (event) { 508 case 0xcc: 509 input_report_switch(input_dev, SW_TABLET_MODE, 1); 510 input_sync(input_dev); 511 return true; 512 case 0xcd: 513 input_report_switch(input_dev, SW_TABLET_MODE, 0); 514 input_sync(input_dev); 515 return true; 516 default: 517 return false; 518 } 519 } 520 521 static void notify_handler(acpi_handle handle, u32 event, void *context) 522 { 523 struct platform_device *device = context; 524 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev); 525 unsigned long long ev_index; 526 struct key_entry *ke; 527 int err; 528 529 /* 530 * Some convertible have unreliable VGBS return which could cause incorrect 531 * SW_TABLET_MODE report, in these cases we enable support when receiving 532 * the first event instead of during driver setup. 533 */ 534 if (!priv->switches && enable_sw_tablet_mode == TABLET_SW_AT_EVENT && 535 (event == 0xcc || event == 0xcd)) { 536 dev_info(&device->dev, "switch event received, enable switches supports\n"); 537 err = intel_hid_switches_setup(device); 538 if (err) 539 pr_err("Failed to setup Intel HID switches\n"); 540 } 541 542 if (priv->wakeup_mode) { 543 /* 544 * Needed for wakeup from suspend-to-idle to work on some 545 * platforms that don't expose the 5-button array, but still 546 * send notifies with the power button event code to this 547 * device object on power button actions while suspended. 548 */ 549 if (event == 0xce) 550 goto wakeup; 551 552 /* 553 * Some devices send (duplicate) tablet-mode events when moved 554 * around even though the mode has not changed; and they do this 555 * even when suspended. 556 * Update the switch state in case it changed and then return 557 * without waking up to avoid spurious wakeups. 558 */ 559 if (event == 0xcc || event == 0xcd) { 560 report_tablet_mode_event(priv->switches, event); 561 return; 562 } 563 564 /* Wake up on 5-button array events only. */ 565 if (event == 0xc0 || !priv->array) 566 return; 567 568 ke = sparse_keymap_entry_from_scancode(priv->array, event); 569 if (!ke) { 570 dev_info(&device->dev, "unknown event 0x%x\n", event); 571 return; 572 } 573 574 if (ke->type == KE_IGNORE) 575 return; 576 577 wakeup: 578 pm_wakeup_hard_event(&device->dev); 579 580 return; 581 } 582 583 /* 584 * Needed for suspend to work on some platforms that don't expose 585 * the 5-button array, but still send notifies with power button 586 * event code to this device object on power button actions. 587 * 588 * Report the power button press and release. 589 */ 590 if (!priv->array) { 591 if (event == 0xce) { 592 input_report_key(priv->input_dev, KEY_POWER, 1); 593 input_sync(priv->input_dev); 594 return; 595 } 596 597 if (event == 0xcf) { 598 input_report_key(priv->input_dev, KEY_POWER, 0); 599 input_sync(priv->input_dev); 600 return; 601 } 602 } 603 604 if (report_tablet_mode_event(priv->switches, event)) 605 return; 606 607 /* 0xC0 is for HID events, other values are for 5 button array */ 608 if (event != 0xc0) { 609 if (!priv->array || 610 !sparse_keymap_report_event(priv->array, event, 1, true)) 611 dev_dbg(&device->dev, "unknown event 0x%x\n", event); 612 return; 613 } 614 615 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN, 616 &ev_index)) { 617 dev_warn(&device->dev, "failed to get event index\n"); 618 return; 619 } 620 621 if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true)) 622 dev_dbg(&device->dev, "unknown event index 0x%llx\n", 623 ev_index); 624 } 625 626 static bool button_array_present(struct platform_device *device) 627 { 628 acpi_handle handle = ACPI_HANDLE(&device->dev); 629 unsigned long long event_cap; 630 631 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN, 632 &event_cap)) { 633 /* Check presence of 5 button array or v2 power button */ 634 if (event_cap & 0x60000) 635 return true; 636 } 637 638 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN, 639 &event_cap)) { 640 if (event_cap & 0x20000) 641 return true; 642 } 643 644 if (enable_5_button_array || dmi_check_system(button_array_table)) 645 return true; 646 647 return false; 648 } 649 650 static int intel_hid_probe(struct platform_device *device) 651 { 652 acpi_handle handle = ACPI_HANDLE(&device->dev); 653 unsigned long long mode, dummy; 654 struct intel_hid_priv *priv; 655 acpi_status status; 656 int err; 657 658 intel_hid_init_dsm(handle); 659 660 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) { 661 dev_warn(&device->dev, "failed to read mode\n"); 662 return -ENODEV; 663 } 664 665 if (mode != 0) { 666 /* 667 * This driver only implements "simple" mode. There appear 668 * to be no other modes, but we should be paranoid and check 669 * for compatibility. 670 */ 671 dev_info(&device->dev, "platform is not in simple mode\n"); 672 return -ENODEV; 673 } 674 675 priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL); 676 if (!priv) 677 return -ENOMEM; 678 dev_set_drvdata(&device->dev, priv); 679 680 /* See dual_accel_detect.h for more info on the dual_accel check. */ 681 if (enable_sw_tablet_mode == TABLET_SW_AUTO) { 682 if (dmi_check_system(dmi_vgbs_allow_list)) 683 enable_sw_tablet_mode = TABLET_SW_AT_PROBE; 684 else if (dmi_check_system(dmi_auto_add_switch) && !dual_accel_detect()) 685 enable_sw_tablet_mode = TABLET_SW_AT_EVENT; 686 else 687 enable_sw_tablet_mode = TABLET_SW_OFF; 688 } 689 690 err = intel_hid_input_setup(device); 691 if (err) { 692 pr_err("Failed to setup Intel HID hotkeys\n"); 693 return err; 694 } 695 696 /* Setup 5 button array */ 697 if (button_array_present(device)) { 698 dev_info(&device->dev, "platform supports 5 button array\n"); 699 err = intel_button_array_input_setup(device); 700 if (err) 701 pr_err("Failed to setup Intel 5 button array hotkeys\n"); 702 } 703 704 /* Setup switches for devices that we know VGBS return correctly */ 705 if (enable_sw_tablet_mode == TABLET_SW_AT_PROBE) { 706 dev_info(&device->dev, "platform supports switches\n"); 707 err = intel_hid_switches_setup(device); 708 if (err) 709 pr_err("Failed to setup Intel HID switches\n"); 710 else 711 report_tablet_mode_state(device); 712 } 713 714 status = acpi_install_notify_handler(handle, 715 ACPI_DEVICE_NOTIFY, 716 notify_handler, 717 device); 718 if (ACPI_FAILURE(status)) 719 return -EBUSY; 720 721 err = intel_hid_set_enable(&device->dev, true); 722 if (err) 723 goto err_remove_notify; 724 725 intel_button_array_enable(&device->dev, true); 726 727 /* 728 * Call button load method to enable HID power button 729 * Always do this since it activates events on some devices without 730 * a button array too. 731 */ 732 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN, &dummy)) 733 dev_warn(&device->dev, "failed to enable HID power button\n"); 734 735 device_init_wakeup(&device->dev, true); 736 /* 737 * In order for system wakeup to work, the EC GPE has to be marked as 738 * a wakeup one, so do that here (this setting will persist, but it has 739 * no effect until the wakeup mask is set for the EC GPE). 740 */ 741 acpi_ec_mark_gpe_for_wake(); 742 return 0; 743 744 err_remove_notify: 745 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 746 747 return err; 748 } 749 750 static void intel_hid_remove(struct platform_device *device) 751 { 752 acpi_handle handle = ACPI_HANDLE(&device->dev); 753 754 device_init_wakeup(&device->dev, false); 755 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler); 756 intel_hid_set_enable(&device->dev, false); 757 intel_button_array_enable(&device->dev, false); 758 } 759 760 static struct platform_driver intel_hid_pl_driver = { 761 .driver = { 762 .name = "intel-hid", 763 .acpi_match_table = intel_hid_ids, 764 .pm = &intel_hid_pl_pm_ops, 765 }, 766 .probe = intel_hid_probe, 767 .remove = intel_hid_remove, 768 }; 769 770 /* 771 * Unfortunately, some laptops provide a _HID="INT33D5" device with 772 * _CID="PNP0C02". This causes the pnpacpi scan driver to claim the 773 * ACPI node, so no platform device will be created. The pnpacpi 774 * driver rejects this device in subsequent processing, so no physical 775 * node is created at all. 776 * 777 * As a workaround until the ACPI core figures out how to handle 778 * this corner case, manually ask the ACPI platform device code to 779 * claim the ACPI node. 780 */ 781 static acpi_status __init 782 check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv) 783 { 784 const struct acpi_device_id *ids = context; 785 struct acpi_device *dev = acpi_fetch_acpi_dev(handle); 786 787 if (dev && acpi_match_device_ids(dev, ids) == 0) 788 if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL))) 789 dev_info(&dev->dev, 790 "intel-hid: created platform device\n"); 791 792 return AE_OK; 793 } 794 795 static int __init intel_hid_init(void) 796 { 797 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 798 ACPI_UINT32_MAX, check_acpi_dev, NULL, 799 (void *)intel_hid_ids, NULL); 800 801 return platform_driver_register(&intel_hid_pl_driver); 802 } 803 module_init(intel_hid_init); 804 805 static void __exit intel_hid_exit(void) 806 { 807 platform_driver_unregister(&intel_hid_pl_driver); 808 } 809 module_exit(intel_hid_exit); 810