M: AceLan Kao <acelan.kao@canonical.com>
L: platform-driver-x86@vger.kernel.org
S: Maintained
-F: drivers/platform/x86/intel-vbtn.c
+F: drivers/platform/x86/intel/vbtn.c
INTEL WIRELESS 3945ABG/BG, 4965AGN (iwlegacy)
M: Stanislaw Gruszka <stf_xl@wp.pl>
source "drivers/platform/x86/intel/Kconfig"
-config INTEL_VBTN
- tristate "INTEL VIRTUAL BUTTON"
- depends on ACPI
- depends on INPUT
- depends on I2C
- select INPUT_SPARSEKMAP
- help
- This driver provides support for the Intel Virtual Button interface.
- Some laptops require this driver for power button support.
-
- To compile this driver as a module, choose M here: the module will
- be called intel_vbtn.
-
config MSI_LAPTOP
tristate "MSI Laptop Extras"
depends on ACPI
# Intel
obj-$(CONFIG_X86_PLATFORM_DRIVERS_INTEL) += intel/
-obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
-
# MSI
obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o
obj-$(CONFIG_MSI_WMI) += msi-wmi.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Intel Virtual Button driver for Windows 8.1+
- *
- * Copyright (C) 2016 AceLan Kao <acelan.kao@canonical.com>
- * Copyright (C) 2016 Alex Hung <alex.hung@canonical.com>
- */
-
-#include <linux/acpi.h>
-#include <linux/dmi.h>
-#include <linux/input.h>
-#include <linux/input/sparse-keymap.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/suspend.h>
-#include "dual_accel_detect.h"
-
-/* Returned when NOT in tablet mode on some HP Stream x360 11 models */
-#define VGBS_TABLET_MODE_FLAG_ALT 0x10
-/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
-#define VGBS_TABLET_MODE_FLAG 0x40
-#define VGBS_DOCK_MODE_FLAG 0x80
-
-#define VGBS_TABLET_MODE_FLAGS (VGBS_TABLET_MODE_FLAG | VGBS_TABLET_MODE_FLAG_ALT)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("AceLan Kao");
-
-static const struct acpi_device_id intel_vbtn_ids[] = {
- {"INT33D6", 0},
- {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, intel_vbtn_ids);
-
-/* In theory, these are HID usages. */
-static const struct key_entry intel_vbtn_keymap[] = {
- { KE_KEY, 0xC0, { KEY_POWER } }, /* power key press */
- { KE_IGNORE, 0xC1, { KEY_POWER } }, /* power key release */
- { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* 'Windows' key press */
- { KE_KEY, 0xC3, { KEY_LEFTMETA } }, /* 'Windows' key release */
- { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* volume-up key press */
- { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* volume-up key release */
- { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* volume-down key press */
- { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* volume-down key release */
- { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key press */
- { KE_KEY, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key release */
- { KE_END }
-};
-
-static const struct key_entry intel_vbtn_switchmap[] = {
- /*
- * SW_DOCK should only be reported for docking stations, but DSDTs using the
- * intel-vbtn code, always seem to use this for 2-in-1s / convertibles and set
- * SW_DOCK=1 when in laptop-mode (in tandem with setting SW_TABLET_MODE=0).
- * This causes userspace to think the laptop is docked to a port-replicator
- * and to disable suspend-on-lid-close, which is undesirable.
- * Map the dock events to KEY_IGNORE to avoid this broken SW_DOCK reporting.
- */
- { KE_IGNORE, 0xCA, { .sw = { SW_DOCK, 1 } } }, /* Docked */
- { KE_IGNORE, 0xCB, { .sw = { SW_DOCK, 0 } } }, /* Undocked */
- { KE_SW, 0xCC, { .sw = { SW_TABLET_MODE, 1 } } }, /* Tablet */
- { KE_SW, 0xCD, { .sw = { SW_TABLET_MODE, 0 } } }, /* Laptop */
- { KE_END }
-};
-
-struct intel_vbtn_priv {
- struct input_dev *buttons_dev;
- struct input_dev *switches_dev;
- bool dual_accel;
- bool has_buttons;
- bool has_switches;
- bool wakeup_mode;
-};
-
-static void detect_tablet_mode(struct platform_device *device)
-{
- struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
- acpi_handle handle = ACPI_HANDLE(&device->dev);
- unsigned long long vgbs;
- acpi_status status;
- int m;
-
- status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
- if (ACPI_FAILURE(status))
- return;
-
- m = !(vgbs & VGBS_TABLET_MODE_FLAGS);
- input_report_switch(priv->switches_dev, SW_TABLET_MODE, m);
- m = (vgbs & VGBS_DOCK_MODE_FLAG) ? 1 : 0;
- input_report_switch(priv->switches_dev, SW_DOCK, m);
-}
-
-/*
- * Note this unconditionally creates the 2 input_dev-s and sets up
- * the sparse-keymaps. Only the registration is conditional on
- * have_buttons / have_switches. This is done so that the notify
- * handler can always call sparse_keymap_entry_from_scancode()
- * on the input_dev-s do determine the event type.
- */
-static int intel_vbtn_input_setup(struct platform_device *device)
-{
- struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
- int ret;
-
- priv->buttons_dev = devm_input_allocate_device(&device->dev);
- if (!priv->buttons_dev)
- return -ENOMEM;
-
- ret = sparse_keymap_setup(priv->buttons_dev, intel_vbtn_keymap, NULL);
- if (ret)
- return ret;
-
- priv->buttons_dev->dev.parent = &device->dev;
- priv->buttons_dev->name = "Intel Virtual Buttons";
- priv->buttons_dev->id.bustype = BUS_HOST;
-
- if (priv->has_buttons) {
- ret = input_register_device(priv->buttons_dev);
- if (ret)
- return ret;
- }
-
- priv->switches_dev = devm_input_allocate_device(&device->dev);
- if (!priv->switches_dev)
- return -ENOMEM;
-
- ret = sparse_keymap_setup(priv->switches_dev, intel_vbtn_switchmap, NULL);
- if (ret)
- return ret;
-
- priv->switches_dev->dev.parent = &device->dev;
- priv->switches_dev->name = "Intel Virtual Switches";
- priv->switches_dev->id.bustype = BUS_HOST;
-
- if (priv->has_switches) {
- detect_tablet_mode(device);
-
- ret = input_register_device(priv->switches_dev);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static void notify_handler(acpi_handle handle, u32 event, void *context)
-{
- struct platform_device *device = context;
- struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
- unsigned int val = !(event & 1); /* Even=press, Odd=release */
- const struct key_entry *ke, *ke_rel;
- struct input_dev *input_dev;
- bool autorelease;
- int ret;
-
- if ((ke = sparse_keymap_entry_from_scancode(priv->buttons_dev, event))) {
- if (!priv->has_buttons) {
- dev_warn(&device->dev, "Warning: received a button event on a device without buttons, please report this.\n");
- return;
- }
- input_dev = priv->buttons_dev;
- } else if ((ke = sparse_keymap_entry_from_scancode(priv->switches_dev, event))) {
- if (!priv->has_switches) {
- /* See dual_accel_detect.h for more info */
- if (priv->dual_accel)
- return;
-
- dev_info(&device->dev, "Registering Intel Virtual Switches input-dev after receiving a switch event\n");
- ret = input_register_device(priv->switches_dev);
- if (ret)
- return;
-
- priv->has_switches = true;
- }
- input_dev = priv->switches_dev;
- } else {
- dev_dbg(&device->dev, "unknown event index 0x%x\n", event);
- return;
- }
-
- if (priv->wakeup_mode) {
- pm_wakeup_hard_event(&device->dev);
-
- /*
- * Skip reporting an evdev event for button wake events,
- * mirroring how the drivers/acpi/button.c code skips this too.
- */
- if (ke->type == KE_KEY)
- return;
- }
-
- /*
- * Even press events are autorelease if there is no corresponding odd
- * release event, or if the odd event is KE_IGNORE.
- */
- ke_rel = sparse_keymap_entry_from_scancode(input_dev, event | 1);
- autorelease = val && (!ke_rel || ke_rel->type == KE_IGNORE);
-
- sparse_keymap_report_event(input_dev, event, val, autorelease);
-}
-
-/*
- * There are several laptops (non 2-in-1) models out there which support VGBS,
- * but simply always return 0, which we translate to SW_TABLET_MODE=1. This in
- * turn causes userspace (libinput) to suppress events from the builtin
- * keyboard and touchpad, making the laptop essentially unusable.
- *
- * Since the problem of wrongly reporting SW_TABLET_MODE=1 in combination
- * with libinput, leads to a non-usable system. Where as OTOH many people will
- * not even notice when SW_TABLET_MODE is not being reported, a DMI based allow
- * list is used here. This list mainly matches on the chassis-type of 2-in-1s.
- *
- * There are also some 2-in-1s which use the intel-vbtn ACPI interface to report
- * SW_TABLET_MODE with a chassis-type of 8 ("Portable") or 10 ("Notebook"),
- * these are matched on a per model basis, since many normal laptops with a
- * possible broken VGBS ACPI-method also use these chassis-types.
- */
-static const struct dmi_system_id dmi_switches_allow_list[] = {
- {
- .matches = {
- DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */),
- },
- },
- {
- .matches = {
- DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */),
- },
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
- },
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion 13 x360 PC"),
- },
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
- DMI_MATCH(DMI_PRODUCT_NAME, "Switch SA5-271"),
- },
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
- DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7352"),
- },
- },
- {} /* Array terminator */
-};
-
-static bool intel_vbtn_has_switches(acpi_handle handle, bool dual_accel)
-{
- unsigned long long vgbs;
- acpi_status status;
-
- /* See dual_accel_detect.h for more info */
- if (dual_accel)
- return false;
-
- if (!dmi_check_system(dmi_switches_allow_list))
- return false;
-
- status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
- return ACPI_SUCCESS(status);
-}
-
-static int intel_vbtn_probe(struct platform_device *device)
-{
- acpi_handle handle = ACPI_HANDLE(&device->dev);
- bool dual_accel, has_buttons, has_switches;
- struct intel_vbtn_priv *priv;
- acpi_status status;
- int err;
-
- dual_accel = dual_accel_detect();
- has_buttons = acpi_has_method(handle, "VBDL");
- has_switches = intel_vbtn_has_switches(handle, dual_accel);
-
- if (!has_buttons && !has_switches) {
- dev_warn(&device->dev, "failed to read Intel Virtual Button driver\n");
- return -ENODEV;
- }
-
- priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- dev_set_drvdata(&device->dev, priv);
-
- priv->dual_accel = dual_accel;
- priv->has_buttons = has_buttons;
- priv->has_switches = has_switches;
-
- err = intel_vbtn_input_setup(device);
- if (err) {
- pr_err("Failed to setup Intel Virtual Button\n");
- return err;
- }
-
- status = acpi_install_notify_handler(handle,
- ACPI_DEVICE_NOTIFY,
- notify_handler,
- device);
- if (ACPI_FAILURE(status))
- return -EBUSY;
-
- if (has_buttons) {
- status = acpi_evaluate_object(handle, "VBDL", NULL, NULL);
- if (ACPI_FAILURE(status))
- dev_err(&device->dev, "Error VBDL failed with ACPI status %d\n", status);
- }
-
- device_init_wakeup(&device->dev, true);
- /*
- * In order for system wakeup to work, the EC GPE has to be marked as
- * a wakeup one, so do that here (this setting will persist, but it has
- * no effect until the wakeup mask is set for the EC GPE).
- */
- acpi_ec_mark_gpe_for_wake();
- return 0;
-}
-
-static int intel_vbtn_remove(struct platform_device *device)
-{
- acpi_handle handle = ACPI_HANDLE(&device->dev);
-
- device_init_wakeup(&device->dev, false);
- acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
-
- /*
- * Even if we failed to shut off the event stream, we can still
- * safely detach from the device.
- */
- return 0;
-}
-
-static int intel_vbtn_pm_prepare(struct device *dev)
-{
- if (device_may_wakeup(dev)) {
- struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
-
- priv->wakeup_mode = true;
- }
- return 0;
-}
-
-static void intel_vbtn_pm_complete(struct device *dev)
-{
- struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
-
- priv->wakeup_mode = false;
-}
-
-static int intel_vbtn_pm_resume(struct device *dev)
-{
- intel_vbtn_pm_complete(dev);
- return 0;
-}
-
-static const struct dev_pm_ops intel_vbtn_pm_ops = {
- .prepare = intel_vbtn_pm_prepare,
- .complete = intel_vbtn_pm_complete,
- .resume = intel_vbtn_pm_resume,
- .restore = intel_vbtn_pm_resume,
- .thaw = intel_vbtn_pm_resume,
-};
-
-static struct platform_driver intel_vbtn_pl_driver = {
- .driver = {
- .name = "intel-vbtn",
- .acpi_match_table = intel_vbtn_ids,
- .pm = &intel_vbtn_pm_ops,
- },
- .probe = intel_vbtn_probe,
- .remove = intel_vbtn_remove,
-};
-
-static acpi_status __init
-check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
- const struct acpi_device_id *ids = context;
- struct acpi_device *dev;
-
- if (acpi_bus_get_device(handle, &dev) != 0)
- return AE_OK;
-
- if (acpi_match_device_ids(dev, ids) == 0)
- if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL)))
- dev_info(&dev->dev,
- "intel-vbtn: created platform device\n");
-
- return AE_OK;
-}
-
-static int __init intel_vbtn_init(void)
-{
- acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, check_acpi_dev, NULL,
- (void *)intel_vbtn_ids, NULL);
-
- return platform_driver_register(&intel_vbtn_pl_driver);
-}
-module_init(intel_vbtn_init);
-
-static void __exit intel_vbtn_exit(void)
-{
- platform_driver_unregister(&intel_vbtn_pl_driver);
-}
-module_exit(intel_vbtn_exit);
To compile this driver as a module, choose M here: the module will
be called intel_hid.
+config INTEL_VBTN
+ tristate "Intel Virtual Button"
+ depends on ACPI
+ depends on INPUT
+ depends on I2C
+ select INPUT_SPARSEKMAP
+ help
+ This driver provides support for the Intel Virtual Button interface.
+ Some laptops require this driver for power button support.
+
+ To compile this driver as a module, choose M here: the module will
+ be called intel_vbtn.
+
config INTEL_INT0002_VGPIO
tristate "Intel ACPI INT0002 Virtual GPIO driver"
depends on GPIOLIB && ACPI && PM_SLEEP
# Intel input drivers
intel-hid-y := hid.o
obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
+intel-vbtn-y := vbtn.o
+obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
# Intel miscellaneous drivers
intel_int0002_vgpio-y := int0002_vgpio.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Intel Virtual Button driver for Windows 8.1+
+ *
+ * Copyright (C) 2016 AceLan Kao <acelan.kao@canonical.com>
+ * Copyright (C) 2016 Alex Hung <alex.hung@canonical.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include "../dual_accel_detect.h"
+
+/* Returned when NOT in tablet mode on some HP Stream x360 11 models */
+#define VGBS_TABLET_MODE_FLAG_ALT 0x10
+/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
+#define VGBS_TABLET_MODE_FLAG 0x40
+#define VGBS_DOCK_MODE_FLAG 0x80
+
+#define VGBS_TABLET_MODE_FLAGS (VGBS_TABLET_MODE_FLAG | VGBS_TABLET_MODE_FLAG_ALT)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("AceLan Kao");
+
+static const struct acpi_device_id intel_vbtn_ids[] = {
+ {"INT33D6", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, intel_vbtn_ids);
+
+/* In theory, these are HID usages. */
+static const struct key_entry intel_vbtn_keymap[] = {
+ { KE_KEY, 0xC0, { KEY_POWER } }, /* power key press */
+ { KE_IGNORE, 0xC1, { KEY_POWER } }, /* power key release */
+ { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* 'Windows' key press */
+ { KE_KEY, 0xC3, { KEY_LEFTMETA } }, /* 'Windows' key release */
+ { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* volume-up key press */
+ { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* volume-up key release */
+ { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* volume-down key press */
+ { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* volume-down key release */
+ { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key press */
+ { KE_KEY, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* rotate-lock key release */
+ { KE_END }
+};
+
+static const struct key_entry intel_vbtn_switchmap[] = {
+ /*
+ * SW_DOCK should only be reported for docking stations, but DSDTs using the
+ * intel-vbtn code, always seem to use this for 2-in-1s / convertibles and set
+ * SW_DOCK=1 when in laptop-mode (in tandem with setting SW_TABLET_MODE=0).
+ * This causes userspace to think the laptop is docked to a port-replicator
+ * and to disable suspend-on-lid-close, which is undesirable.
+ * Map the dock events to KEY_IGNORE to avoid this broken SW_DOCK reporting.
+ */
+ { KE_IGNORE, 0xCA, { .sw = { SW_DOCK, 1 } } }, /* Docked */
+ { KE_IGNORE, 0xCB, { .sw = { SW_DOCK, 0 } } }, /* Undocked */
+ { KE_SW, 0xCC, { .sw = { SW_TABLET_MODE, 1 } } }, /* Tablet */
+ { KE_SW, 0xCD, { .sw = { SW_TABLET_MODE, 0 } } }, /* Laptop */
+ { KE_END }
+};
+
+struct intel_vbtn_priv {
+ struct input_dev *buttons_dev;
+ struct input_dev *switches_dev;
+ bool dual_accel;
+ bool has_buttons;
+ bool has_switches;
+ bool wakeup_mode;
+};
+
+static void detect_tablet_mode(struct platform_device *device)
+{
+ struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
+ acpi_handle handle = ACPI_HANDLE(&device->dev);
+ unsigned long long vgbs;
+ acpi_status status;
+ int m;
+
+ status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
+ if (ACPI_FAILURE(status))
+ return;
+
+ m = !(vgbs & VGBS_TABLET_MODE_FLAGS);
+ input_report_switch(priv->switches_dev, SW_TABLET_MODE, m);
+ m = (vgbs & VGBS_DOCK_MODE_FLAG) ? 1 : 0;
+ input_report_switch(priv->switches_dev, SW_DOCK, m);
+}
+
+/*
+ * Note this unconditionally creates the 2 input_dev-s and sets up
+ * the sparse-keymaps. Only the registration is conditional on
+ * have_buttons / have_switches. This is done so that the notify
+ * handler can always call sparse_keymap_entry_from_scancode()
+ * on the input_dev-s do determine the event type.
+ */
+static int intel_vbtn_input_setup(struct platform_device *device)
+{
+ struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
+ int ret;
+
+ priv->buttons_dev = devm_input_allocate_device(&device->dev);
+ if (!priv->buttons_dev)
+ return -ENOMEM;
+
+ ret = sparse_keymap_setup(priv->buttons_dev, intel_vbtn_keymap, NULL);
+ if (ret)
+ return ret;
+
+ priv->buttons_dev->dev.parent = &device->dev;
+ priv->buttons_dev->name = "Intel Virtual Buttons";
+ priv->buttons_dev->id.bustype = BUS_HOST;
+
+ if (priv->has_buttons) {
+ ret = input_register_device(priv->buttons_dev);
+ if (ret)
+ return ret;
+ }
+
+ priv->switches_dev = devm_input_allocate_device(&device->dev);
+ if (!priv->switches_dev)
+ return -ENOMEM;
+
+ ret = sparse_keymap_setup(priv->switches_dev, intel_vbtn_switchmap, NULL);
+ if (ret)
+ return ret;
+
+ priv->switches_dev->dev.parent = &device->dev;
+ priv->switches_dev->name = "Intel Virtual Switches";
+ priv->switches_dev->id.bustype = BUS_HOST;
+
+ if (priv->has_switches) {
+ detect_tablet_mode(device);
+
+ ret = input_register_device(priv->switches_dev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void notify_handler(acpi_handle handle, u32 event, void *context)
+{
+ struct platform_device *device = context;
+ struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
+ unsigned int val = !(event & 1); /* Even=press, Odd=release */
+ const struct key_entry *ke, *ke_rel;
+ struct input_dev *input_dev;
+ bool autorelease;
+ int ret;
+
+ if ((ke = sparse_keymap_entry_from_scancode(priv->buttons_dev, event))) {
+ if (!priv->has_buttons) {
+ dev_warn(&device->dev, "Warning: received a button event on a device without buttons, please report this.\n");
+ return;
+ }
+ input_dev = priv->buttons_dev;
+ } else if ((ke = sparse_keymap_entry_from_scancode(priv->switches_dev, event))) {
+ if (!priv->has_switches) {
+ /* See dual_accel_detect.h for more info */
+ if (priv->dual_accel)
+ return;
+
+ dev_info(&device->dev, "Registering Intel Virtual Switches input-dev after receiving a switch event\n");
+ ret = input_register_device(priv->switches_dev);
+ if (ret)
+ return;
+
+ priv->has_switches = true;
+ }
+ input_dev = priv->switches_dev;
+ } else {
+ dev_dbg(&device->dev, "unknown event index 0x%x\n", event);
+ return;
+ }
+
+ if (priv->wakeup_mode) {
+ pm_wakeup_hard_event(&device->dev);
+
+ /*
+ * Skip reporting an evdev event for button wake events,
+ * mirroring how the drivers/acpi/button.c code skips this too.
+ */
+ if (ke->type == KE_KEY)
+ return;
+ }
+
+ /*
+ * Even press events are autorelease if there is no corresponding odd
+ * release event, or if the odd event is KE_IGNORE.
+ */
+ ke_rel = sparse_keymap_entry_from_scancode(input_dev, event | 1);
+ autorelease = val && (!ke_rel || ke_rel->type == KE_IGNORE);
+
+ sparse_keymap_report_event(input_dev, event, val, autorelease);
+}
+
+/*
+ * There are several laptops (non 2-in-1) models out there which support VGBS,
+ * but simply always return 0, which we translate to SW_TABLET_MODE=1. This in
+ * turn causes userspace (libinput) to suppress events from the builtin
+ * keyboard and touchpad, making the laptop essentially unusable.
+ *
+ * Since the problem of wrongly reporting SW_TABLET_MODE=1 in combination
+ * with libinput, leads to a non-usable system. Where as OTOH many people will
+ * not even notice when SW_TABLET_MODE is not being reported, a DMI based allow
+ * list is used here. This list mainly matches on the chassis-type of 2-in-1s.
+ *
+ * There are also some 2-in-1s which use the intel-vbtn ACPI interface to report
+ * SW_TABLET_MODE with a chassis-type of 8 ("Portable") or 10 ("Notebook"),
+ * these are matched on a per model basis, since many normal laptops with a
+ * possible broken VGBS ACPI-method also use these chassis-types.
+ */
+static const struct dmi_system_id dmi_switches_allow_list[] = {
+ {
+ .matches = {
+ DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */),
+ },
+ },
+ {
+ .matches = {
+ DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */),
+ },
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
+ },
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion 13 x360 PC"),
+ },
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Switch SA5-271"),
+ },
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7352"),
+ },
+ },
+ {} /* Array terminator */
+};
+
+static bool intel_vbtn_has_switches(acpi_handle handle, bool dual_accel)
+{
+ unsigned long long vgbs;
+ acpi_status status;
+
+ /* See dual_accel_detect.h for more info */
+ if (dual_accel)
+ return false;
+
+ if (!dmi_check_system(dmi_switches_allow_list))
+ return false;
+
+ status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
+ return ACPI_SUCCESS(status);
+}
+
+static int intel_vbtn_probe(struct platform_device *device)
+{
+ acpi_handle handle = ACPI_HANDLE(&device->dev);
+ bool dual_accel, has_buttons, has_switches;
+ struct intel_vbtn_priv *priv;
+ acpi_status status;
+ int err;
+
+ dual_accel = dual_accel_detect();
+ has_buttons = acpi_has_method(handle, "VBDL");
+ has_switches = intel_vbtn_has_switches(handle, dual_accel);
+
+ if (!has_buttons && !has_switches) {
+ dev_warn(&device->dev, "failed to read Intel Virtual Button driver\n");
+ return -ENODEV;
+ }
+
+ priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ dev_set_drvdata(&device->dev, priv);
+
+ priv->dual_accel = dual_accel;
+ priv->has_buttons = has_buttons;
+ priv->has_switches = has_switches;
+
+ err = intel_vbtn_input_setup(device);
+ if (err) {
+ pr_err("Failed to setup Intel Virtual Button\n");
+ return err;
+ }
+
+ status = acpi_install_notify_handler(handle,
+ ACPI_DEVICE_NOTIFY,
+ notify_handler,
+ device);
+ if (ACPI_FAILURE(status))
+ return -EBUSY;
+
+ if (has_buttons) {
+ status = acpi_evaluate_object(handle, "VBDL", NULL, NULL);
+ if (ACPI_FAILURE(status))
+ dev_err(&device->dev, "Error VBDL failed with ACPI status %d\n", status);
+ }
+
+ device_init_wakeup(&device->dev, true);
+ /*
+ * In order for system wakeup to work, the EC GPE has to be marked as
+ * a wakeup one, so do that here (this setting will persist, but it has
+ * no effect until the wakeup mask is set for the EC GPE).
+ */
+ acpi_ec_mark_gpe_for_wake();
+ return 0;
+}
+
+static int intel_vbtn_remove(struct platform_device *device)
+{
+ acpi_handle handle = ACPI_HANDLE(&device->dev);
+
+ device_init_wakeup(&device->dev, false);
+ acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
+
+ /*
+ * Even if we failed to shut off the event stream, we can still
+ * safely detach from the device.
+ */
+ return 0;
+}
+
+static int intel_vbtn_pm_prepare(struct device *dev)
+{
+ if (device_may_wakeup(dev)) {
+ struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
+
+ priv->wakeup_mode = true;
+ }
+ return 0;
+}
+
+static void intel_vbtn_pm_complete(struct device *dev)
+{
+ struct intel_vbtn_priv *priv = dev_get_drvdata(dev);
+
+ priv->wakeup_mode = false;
+}
+
+static int intel_vbtn_pm_resume(struct device *dev)
+{
+ intel_vbtn_pm_complete(dev);
+ return 0;
+}
+
+static const struct dev_pm_ops intel_vbtn_pm_ops = {
+ .prepare = intel_vbtn_pm_prepare,
+ .complete = intel_vbtn_pm_complete,
+ .resume = intel_vbtn_pm_resume,
+ .restore = intel_vbtn_pm_resume,
+ .thaw = intel_vbtn_pm_resume,
+};
+
+static struct platform_driver intel_vbtn_pl_driver = {
+ .driver = {
+ .name = "intel-vbtn",
+ .acpi_match_table = intel_vbtn_ids,
+ .pm = &intel_vbtn_pm_ops,
+ },
+ .probe = intel_vbtn_probe,
+ .remove = intel_vbtn_remove,
+};
+
+static acpi_status __init
+check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ const struct acpi_device_id *ids = context;
+ struct acpi_device *dev;
+
+ if (acpi_bus_get_device(handle, &dev) != 0)
+ return AE_OK;
+
+ if (acpi_match_device_ids(dev, ids) == 0)
+ if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL)))
+ dev_info(&dev->dev,
+ "intel-vbtn: created platform device\n");
+
+ return AE_OK;
+}
+
+static int __init intel_vbtn_init(void)
+{
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, check_acpi_dev, NULL,
+ (void *)intel_vbtn_ids, NULL);
+
+ return platform_driver_register(&intel_vbtn_pl_driver);
+}
+module_init(intel_vbtn_init);
+
+static void __exit intel_vbtn_exit(void)
+{
+ platform_driver_unregister(&intel_vbtn_pl_driver);
+}
+module_exit(intel_vbtn_exit);
projects / linux.git / commitdiff