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| 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;
}
} |
Dell travaille sur des pilotes de "boutons de confidentialité" pour désactiver le microphone et la caméra
Que pensez-vous de l'idée de disposer d'un outil physique pour couper l'accès au microphone et à la caméra ?
Répondre avec citation
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