platform/x86: intel-vbtn: Move to intel sub-directory

Move Intel vButton driver to intel sub-directory to improve readability.

Signed-off-by: Kate Hsuan <hpa@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210820110458.73018-19-andriy.shevchenko@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 0 insertions, 414 deletions

diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
deleted file mode 100644
index 309166431063..000000000000
--- a/drivers/platform/x86/intel-vbtn.c
+++ /dev/null
@@ -1,414 +0,0 @@
-// 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);