Dès l’année prochaine, Dell va fournir des « boutons de confidentialité » matériels pour désactiver la prise en charge du microphone et de la caméra. En vue de la mise sur le marché d'autres ordinateurs portables Dell dotés de ces boutons, un pilote de confidentialité Dell est en cours de préparation pour le noyau Linux.Ces nouveaux boutons de confidentialité Dell sont essentiellement des interrupteurs d'arrêt matériels pour le flux audio du microphone et vidéo de la caméra. Le pilote de confidentialité Dell envoyé mardi par Perry Yuan (Software Principal Engineer chez Dell) aux responsables du noyau Linux consiste à manipuler les voyants appropriés et à suivre l'état des commandes matérielles, tandis que le basculement (switch) réel du support audio / vidéo est géré par le matériel.
Dans sa forme actuelle, le pilote de confidentialité Dell prend en charge la caméra et le microphone, mais le patch note également un bit "PRIVACY_SCREEN_STATUS". Vraisemblablement, Dell a l’intention d’étendre ce pilote de confidentialité à la gestion d’un filtre de confidentialité (il s’agit d’une protection qui se place devant un écran afin de restreindre la vision des données affichées de part et d’autre de l’axe de vision), ce qui n'est pas sans rappeler le PrivacyGuard de Lenovo et le code pour le filtre de confidentialité sur lequel Google travaille avec les Chromebooks Intel.
Perry Yuan indique dans son courriel : « Ajout de la prise en charge du pilote de confidentialité Dell pour la conception de confidentialité matérielle des unités Dell, qui protège la confidentialité des utilisateurs de l'audio et de la caméra à partir du hardware. Une fois le mode de confidentialité audio ou caméra activé, aucune application ne recevra de flux audio ou vidéo. Lorsque l'utilisateur appuie sur la touche de raccourci ctrl + F4, le mode de confidentialité audio est activé et la touche de raccourci de désactivation de la caméra est ctrl + F9 ».
Voici le code envoyé par les ingénieurs Dell :
| Code C : | Sélectionner tout |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 | drivers/platform/x86/Kconfig | 12 ++ drivers/platform/x86/Makefile | 4 +- drivers/platform/x86/dell-laptop.c | 41 ++-- drivers/platform/x86/dell-privacy-acpi.c | 139 ++++++++++++ drivers/platform/x86/dell-privacy-wmi.c | 259 +++++++++++++++++++++++ drivers/platform/x86/dell-privacy-wmi.h | 23 ++ drivers/platform/x86/dell-wmi.c | 90 ++++---- 7 files changed, 513 insertions(+), 55 deletions(-) create mode 100644 drivers/platform/x86/dell-privacy-acpi.c create mode 100644 drivers/platform/x86/dell-privacy-wmi.c create mode 100644 drivers/platform/x86/dell-privacy-wmi.h diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 40219bba6801..0cb6bf5a9565 100644 a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig @@ -454,6 +454,18 @@ config DELL_WMI_LED This adds support for the Latitude 2100 and similar notebooks that have an external LED. config DELL_PRIVACY tristate "Dell Hardware Privacy Support" depends on ACPI depends on ACPI_WMI depends on INPUT depends on DELL_LAPTOP select DELL_WMI help This driver provides a driver to support messaging related to the privacy button presses on applicable Dell laptops from 2021 and newer. config AMILO_RFKILL tristate "Fujitsu-Siemens Amilo rfkill support" depends on RFKILL diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 5f823f7eff45..111f7215db2f 100644 a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile @@ -47,7 +47,9 @@ obj-$(CONFIG_DELL_WMI) += dell-wmi.o obj-$(CONFIG_DELL_WMI_DESCRIPTOR) += dell-wmi-descriptor.o obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o obj-$(CONFIG_DELL_PRIVACY) += dell-privacy.o dell-privacy-objs := dell-privacy-wmi.o \ dell-privacy-acpi.o # Fujitsu obj-$(CONFIG_AMILO_RFKILL) += amilo-rfkill.o obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index 5e9c2296931c..12b91de09356 100644 a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c @@ -30,6 +30,7 @@ #include <acpi/video.h> #include "dell-rbtn.h" #include "dell-smbios.h" +#include "dell-privacy-wmi.h" struct quirk_entry { bool touchpad_led; @@ -90,6 +91,7 @@ static struct rfkill *wifi_rfkill; static struct rfkill *bluetooth_rfkill; static struct rfkill *wwan_rfkill; static bool force_rfkill; +static bool privacy_valid; module_param(force_rfkill, bool, 0444); MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models"); @@ -2202,20 +2204,25 @@ static int __init dell_init(void) debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, &dell_debugfs_fops); - dell_laptop_register_notifier(&dell_laptop_notifier); - - if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) && - dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE)) { - micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); - ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev); - if (ret < 0) - goto fail_led; - } - - if (acpi_video_get_backlight_type() != acpi_backlight_vendor) - return 0; - - token = dell_smbios_find_token(BRIGHTNESS_TOKEN); + dell_laptop_register_notifier(&dell_laptop_notifier); + + if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) && + dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE)) { +#if IS_ENABLED(CONFIG_DELL_PRIVACY) + privacy_valid = dell_privacy_valid() == -ENODEV; +#endif + if (!privacy_valid) { + micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); + ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev); + if (ret < 0) + goto fail_led; + } + } + + if (acpi_video_get_backlight_type() != acpi_backlight_vendor) + return 0; + + token = dell_smbios_find_token(BRIGHTNESS_TOKEN); if (token) { struct calling_interface_buffer buffer; @@ -2257,7 +2264,8 @@ static int __init dell_init(void) fail_get_brightness: backlight_device_unregister(dell_backlight_device); fail_backlight: - led_classdev_unregister(&micmute_led_cdev); + if (!privacy_valid) + led_classdev_unregister(&micmute_led_cdev); fail_led: dell_cleanup_rfkill(); fail_rfkill: @@ -2278,7 +2286,8 @@ static void __exit dell_exit(void) touchpad_led_exit(); kbd_led_exit(); backlight_device_unregister(dell_backlight_device); - led_classdev_unregister(&micmute_led_cdev); + if (!privacy_valid) + led_classdev_unregister(&micmute_led_cdev); dell_cleanup_rfkill(); if (platform_device) { platform_device_unregister(platform_device); diff --git a/drivers/platform/x86/dell-privacy-acpi.c b/drivers/platform/x86/dell-privacy-acpi.c new file mode 100644 index 000000000000..516cd99167c3 --- /dev/null +++ b/drivers/platform/x86/dell-privacy-acpi.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Dell privacy notification driver + * + * Copyright (C) 2021 Dell Inc. All Rights Reserved. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/kernel.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/sysfs.h> +#include <linux/types.h> +#include <linux/wmi.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include "dell-privacy-wmi.h" + +#define PRIVACY_PlATFORM_NAME "dell-privacy-acpi" +#define ACPI_PRIVACY_DEVICE "\\_SB.PC00.LPCB.ECDV" +#define ACPI_PRIVACY_EC_ACK ACPI_PRIVACY_DEVICE ".ECAK" + +static struct platform_device *privacy_acpi_pdev; + +struct privacy_acpi_priv { + struct device *dev; + struct acpi_device *acpi_dev; + struct input_dev *input_dev; + struct platform_device *platform_device; +}; + +static int micmute_led_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + acpi_status status; + + status = acpi_evaluate_object(NULL, ACPI_PRIVACY_EC_ACK, NULL, NULL); + if (ACPI_FAILURE(status)) { + dev_err(led_cdev->dev, "Error setting privacy audio EC ack value: %d\n",status); + return -EIO; + } + return 0; +} + +static struct led_classdev micmute_led_cdev = { + .name = "platform::micmute", + .max_brightness = 1, + .brightness_set_blocking = micmute_led_set, + .default_trigger = "audio-micmute", +}; + +static int privacy_acpi_remove(struct platform_device *pdev) +{ + dev_set_drvdata(&pdev->dev, NULL); + return 0; +} + +static int privacy_acpi_probe(struct platform_device *pdev) +{ + struct privacy_acpi_priv *privacy; + acpi_handle handle; + acpi_status status; + int err; + + privacy = kzalloc(sizeof(struct privacy_acpi_priv), GFP_KERNEL); + if (!privacy) + return -ENOMEM; + + privacy->dev = &pdev->dev; + privacy->platform_device = pdev; + platform_set_drvdata(pdev, privacy); + /* Look for software micmute complete notification device */ + status = acpi_get_handle(ACPI_ROOT_OBJECT, + ACPI_PRIVACY_DEVICE, + &handle); + if (ACPI_FAILURE(status)) { + dev_err(privacy->dev, "Unable to find Dell`s EC device %s: %d\n", + ACPI_PRIVACY_DEVICE, status); + return -ENXIO; + } + + micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); + err = led_classdev_register(&privacy_acpi_pdev->dev, &micmute_led_cdev); + if (err < 0) + return -EIO; + + return 0; +} + +static const struct acpi_device_id privacy_acpi_device_ids[] = { + {"PNP0C09", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, privacy_acpi_device_ids); + +static struct platform_driver privacy_platform_driver = { + .driver = { + .name = PRIVACY_PlATFORM_NAME, + .acpi_match_table = ACPI_PTR(privacy_acpi_device_ids), + }, + .probe = privacy_acpi_probe, + .remove = privacy_acpi_remove, +}; + +int privacy_acpi_init(void) +{ + int err; + + err = platform_driver_register(&privacy_platform_driver); + if (err) + return err; + + privacy_acpi_pdev = platform_device_register_simple( + PRIVACY_PlATFORM_NAME, -1, NULL, 0); + if (IS_ERR(privacy_acpi_pdev)) { + err = PTR_ERR(privacy_acpi_pdev); + goto err_platform; + } + return 0; + +err_platform: + platform_driver_unregister(&privacy_platform_driver); + return err; +} + +void privacy_acpi_cleanup(void) +{ + platform_driver_unregister(&privacy_platform_driver); +} + +MODULE_AUTHOR("Perry Yuan <perry_yuan@dell.com>"); +MODULE_DESCRIPTION("DELL Privacy ACPI Driver"); +MODULE_LICENSE("GPL"); + diff --git a/drivers/platform/x86/dell-privacy-wmi.c b/drivers/platform/x86/dell-privacy-wmi.c new file mode 100644 index 000000000000..6c36b7ec44c6 --- /dev/null +++ b/drivers/platform/x86/dell-privacy-wmi.c @@ -0,0 +1,259 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Dell privacy notification driver + * + * Copyright (C) 2021 Dell Inc. All Rights Reserved. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/acpi.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/wmi.h> +#include "dell-privacy-wmi.h" + +#define DELL_PRIVACY_GUID "6932965F-1671-4CEB-B988-D3AB0A901919" +#define MICROPHONE_STATUS BIT(0) +#define CAMERA_STATUS BIT(1) +#define PRIVACY_SCREEN_STATUS BIT(2) + +static int privacy_valid = -EPROBE_DEFER; +static LIST_HEAD(wmi_list); +static DEFINE_MUTEX(list_mutex); + +struct privacy_wmi_data { + struct input_dev *input_dev; + struct wmi_device *wdev; + struct list_head list; + u32 features_present; + u32 last_status; +}; + +/* + * Keymap for WMI Privacy events of type 0x0012 + */ +static const struct key_entry dell_wmi_keymap_type_0012[] = { + /* Privacy MIC Mute */ + { KE_KEY, 0x0001, { KEY_MICMUTE } }, + /* Privacy Camera Mute */ + { KE_SW, 0x0002, { SW_CAMERA_LENS_COVER } }, +}; + +bool dell_privacy_valid(void) +{ + bool ret; + + mutex_lock(&list_mutex); + ret = wmi_has_guid(DELL_PRIVACY_GUID); + if (!ret){ + return -ENODEV; + } + ret = privacy_valid; + mutex_unlock(&list_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(dell_privacy_valid); + +void dell_privacy_process_event(int type, int code, int status) +{ + struct privacy_wmi_data *priv; + const struct key_entry *key; + + mutex_lock(&list_mutex); + priv = list_first_entry_or_null(&wmi_list, + struct privacy_wmi_data, + list); + if (priv == NULL) { + pr_err("dell privacy priv is NULL\n"); + goto error; + } + + key = sparse_keymap_entry_from_scancode(priv->input_dev, (type << 16)|code); + if (!key) { + dev_dbg(&priv->wdev->dev, "Unknown key with type 0x%04x and code 0x%04x pressed\n", + type, code); + goto error; + } + + switch (code) { + case DELL_PRIVACY_TYPE_AUDIO: /* Mic mute */ + priv->last_status = status; + sparse_keymap_report_entry(priv->input_dev, key, 1, true); + break; + case DELL_PRIVACY_TYPE_CAMERA: /* Camera mute */ + priv->last_status = status; + sparse_keymap_report_entry(priv->input_dev, key, 1, true); + break; + default: + dev_dbg(&priv->wdev->dev, "unknown event type %u /%u", + type, code); + } +error: + mutex_unlock(&list_mutex); + return; +} +EXPORT_SYMBOL_GPL(dell_privacy_process_event); + +static int get_current_status(struct wmi_device *wdev) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(&wdev->dev); + union acpi_object *obj_present; + union acpi_object *obj_current; + int ret = 0; + + if (priv == NULL) { + pr_err("dell privacy priv is NULL\n"); + return -EINVAL; + } + /* get devices supported */ + obj_present = wmidev_block_query(wdev, 0); + if (obj_present->type != ACPI_TYPE_INTEGER) { + ret = -EIO; + goto present_free; + } + priv->features_present = obj_present->integer.value; + + /* get current state */ + obj_current = wmidev_block_query(wdev, 1); + if (obj_current->type != ACPI_TYPE_INTEGER) { + ret = -EIO; + goto current_free; + } + priv->last_status = obj_current->integer.value; current_free: kfree(obj_current); present_free: kfree(obj_present); return ret; } static int dell_privacy_wmi_probe(struct wmi_device *wdev, const void *context) { struct privacy_wmi_data *priv; struct key_entry *keymap; int ret, i, pos = 0; priv = devm_kzalloc(&wdev->dev, sizeof(struct privacy_wmi_data), GFP_KERNEL); if (!priv) return -ENOMEM; /* create evdev passing interface */ priv->input_dev = devm_input_allocate_device(&wdev->dev); if (!priv->input_dev) return -ENOMEM; __set_bit(EV_KEY, priv->input_dev->evbit); __set_bit(KEY_MICMUTE, priv->input_dev->keybit); __set_bit(EV_MSC, priv->input_dev->evbit); __set_bit(MSC_SCAN, priv->input_dev->mscbit); keymap = kcalloc( ARRAY_SIZE(dell_wmi_keymap_type_0012) + 1, sizeof(struct key_entry), GFP_KERNEL); if (!keymap) { ret = -ENOMEM; goto err_free_dev; } for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) { keymap[pos] = dell_wmi_keymap_type_0012[i]; keymap[pos].code |= (0x0012 << 16); pos++; } ret = sparse_keymap_setup(priv->input_dev, keymap, NULL); if (ret) return ret; priv->input_dev->dev.parent = &wdev->dev; priv->input_dev->name = "Dell Privacy Driver"; priv->input_dev->id.bustype = BUS_HOST; if (input_register_device(priv->input_dev)) { pr_debug("input_register_device failed to register! \n"); return -ENODEV; } priv->wdev = wdev; dev_set_drvdata(&wdev->dev, priv); mutex_lock(&list_mutex); list_add_tail(&priv->list, &wmi_list); privacy_valid = true; if (get_current_status(wdev)) { goto err_free_dev; } mutex_unlock(&list_mutex); kfree(keymap); return 0; err_free_dev: input_free_device(priv->input_dev); kfree(keymap); return ret; } static int dell_privacy_wmi_remove(struct wmi_device *wdev) { struct privacy_wmi_data *priv = dev_get_drvdata(&wdev->dev); mutex_lock(&list_mutex); list_del(&priv->list); privacy_valid = -ENODEV; mutex_unlock(&list_mutex); return 0; } static const struct wmi_device_id dell_wmi_privacy_wmi_id_table[] = { { .guid_string = DELL_PRIVACY_GUID }, { }, }; static struct wmi_driver dell_privacy_wmi_driver = { .driver = { .name = "dell-privacy", }, .probe = dell_privacy_wmi_probe, .remove = dell_privacy_wmi_remove, .id_table = dell_wmi_privacy_wmi_id_table, }; static int __init init_dell_privacy(void) { int ret, wmi, acpi; wmi = wmi_driver_register(&dell_privacy_wmi_driver); if (wmi) { pr_debug("Failed to initialize privacy wmi driver: %d\n", wmi); return wmi; } acpi = privacy_acpi_init(); if (acpi) { pr_debug("failed to initialize privacy wmi acpi driver: %d\n", acpi); return acpi; } return 0; } void exit_dell_privacy_wmi(void) { wmi_driver_unregister(&dell_privacy_wmi_driver); } static void __exit exit_dell_privacy(void) { privacy_acpi_cleanup(); exit_dell_privacy_wmi(); } module_init(init_dell_privacy); module_exit(exit_dell_privacy); MODULE_DEVICE_TABLE(wmi, dell_wmi_privacy_wmi_id_table); MODULE_AUTHOR("Perry Yuan <perry_yuan@dell.com>"); MODULE_DESCRIPTION("Dell Privacy WMI Driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/platform/x86/dell-privacy-wmi.h b/drivers/platform/x86/dell-privacy-wmi.h new file mode 100644 index 000000000000..94af81d76e44 /dev/null b/drivers/platform/x86/dell-privacy-wmi.h @@ -0,0 +1,23 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* * Dell privacy notification driver * * Copyright (C) 2021 Dell Inc. All Rights Reserved. */ #ifndef _DELL_PRIVACY_WMI_H_ #define _DELL_PRIVACY_WMI_H_ #include <linux/wmi.h> bool dell_privacy_valid(void); void dell_privacy_process_event(int type, int code, int status); int privacy_acpi_init(void); void privacy_acpi_cleanup(void); /* DELL Privacy Type */ enum { DELL_PRIVACY_TYPE_UNKNOWN = 0x0, DELL_PRIVACY_TYPE_AUDIO, DELL_PRIVACY_TYPE_CAMERA, }; #endif diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index bbdb3e860892..44bb74e4df86 100644 a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c @@ -27,6 +27,7 @@ #include <acpi/video.h> #include "dell-smbios.h" #include "dell-wmi-descriptor.h" #include "dell-privacy-wmi.h" MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); MODULE_AUTHOR("Pali Rohár <pali@kernel.org>"); @@ -410,44 +411,57 @@ static void dell_wmi_notify(struct wmi_device *wdev, if (buffer_end > buffer_entry + buffer_entry[0] + 1) buffer_end = buffer_entry + buffer_entry[0] + 1; while (buffer_entry < buffer_end) { len = buffer_entry[0]; if (len == 0) break; len++; if (buffer_entry + len > buffer_end) { pr_warn("Invalid length of WMI event\n"); break; } pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry); switch (buffer_entry[1]) { case 0x0000: /* One key pressed or event occurred */ case 0x0012: /* Event with extended data occurred */ if (len > 2) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); /* Extended data is currently ignored */ break; case 0x0010: /* Sequence of keys pressed */ case 0x0011: /* Sequence of events occurred */ for (i = 2; i < len; ++i) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[i]); break; default: /* Unknown event */ pr_info("Unknown WMI event type 0x%x\n", (int)buffer_entry[1]); break; } buffer_entry += len; } while (buffer_entry < buffer_end) { len = buffer_entry[0]; if (len == 0) break; len++; if (buffer_entry + len > buffer_end) { pr_warn("Invalid length of WMI event\n"); break; } pr_debug("Process buffer (%*ph)\n", len*2, buffer_entry); switch (buffer_entry[1]) { case 0x0000: /* One key pressed or event occurred */ if (len > 2) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); break; case 0x0010: /* Sequence of keys pressed */ case 0x0011: /* Sequence of events occurred */ for (i = 2; i < len; ++i) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[i]); break; case 0x0012: #if IS_ENABLED(CONFIG_DELL_PRIVACY) if (dell_privacy_valid()) { dell_privacy_process_event(buffer_entry[1], buffer_entry[3], buffer_entry[4]); } else { if (len > 2) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); } #else /* Extended data is currently ignored */ if (len > 2) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); #endif break; default: /* Unknown event */ pr_info("Unknown WMI event type 0x%x\n", (int)buffer_entry[1]); break; } buffer_entry += len; } } |
Source : liste de diffusion du kernel Linux
Et vous ?
Que pensez-vous de l'idée de disposer d'un outil physique pour couper l'accès au microphone et à la caméra ? 
Envoyé par archqt
