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