drivers/platform/x86/hp_accel.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
  *
  *  Copyright (C) 2007-2008 Yan Burman
  *  Copyright (C) 2008 Eric Piel
  *  Copyright (C) 2008-2009 Pavel Machek
  */

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/dmi.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/wait.h>
 #include <linux/poll.h>
 #include <linux/freezer.h>
 #include <linux/uaccess.h>
 #include <linux/leds.h>
 #include <linux/atomic.h>
 #include <linux/acpi.h>
 #include <linux/i8042.h>
 #include <linux/serio.h>
 #include "../../misc/lis3lv02d/lis3lv02d.h"

 #define DRIVER_NAME     "hp_accel"
 #define ACPI_MDPS_CLASS "accelerometer"

 /* Delayed LEDs infrastructure ------------------------------------ */

 /* Special LED class that can defer work */
 struct delayed_led_classdev {
 	struct led_classdev led_classdev;
 	struct work_struct work;
 	enum led_brightness new_brightness;

 	unsigned int led;		/* For driver */
 	void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
 };

 static inline void delayed_set_status_worker(struct work_struct *work)
 {
 	struct delayed_led_classdev *data =
 			container_of(work, struct delayed_led_classdev, work);

 	data->set_brightness(data, data->new_brightness);
 }

 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
 			      enum led_brightness brightness)
 {
 	struct delayed_led_classdev *data = container_of(led_cdev,
 			     struct delayed_led_classdev, led_classdev);
 	data->new_brightness = brightness;
 	schedule_work(&data->work);
 }

 /* HP-specific accelerometer driver ------------------------------------ */

 /* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
  * HPQ6000 sends through the keyboard bus */
 #define ACCEL_1 0x25
 #define ACCEL_2 0x26
 #define ACCEL_3 0x27
 #define ACCEL_4 0x28

 /* For automatic insertion of the module */
 static const struct acpi_device_id lis3lv02d_device_ids[] = {
 	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
 	{"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
 	{"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
 	{"", 0},
 };
 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);


 /**
  * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
  * @lis3: pointer to the device struct
  *
  * Returns 0 on success.
  */
 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
 {
 	struct acpi_device *dev = lis3->bus_priv;
 	if (!lis3->init_required)
 		return 0;

 	if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
 				 NULL, NULL) != AE_OK)
 		return -EINVAL;

 	return 0;
 }

 /**
  * lis3lv02d_acpi_read - ACPI ALRD method: read a register
  * @lis3: pointer to the device struct
  * @reg:    the register to read
  * @ret:    result of the operation
  *
  * Returns 0 on success.
  */
 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
 {
 	struct acpi_device *dev = lis3->bus_priv;
 	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 	struct acpi_object_list args = { 1, &arg0 };
 	unsigned long long lret;
 	acpi_status status;

 	arg0.integer.value = reg;

 	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
 	if (ACPI_FAILURE(status))
 		return -EINVAL;
 	*ret = lret;
 	return 0;
 }

 /**
  * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
  * @lis3: pointer to the device struct
  * @reg:    the register to write to
  * @val:    the value to write
  *
  * Returns 0 on success.
  */
 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
 {
 	struct acpi_device *dev = lis3->bus_priv;
 	unsigned long long ret; /* Not used when writting */
 	union acpi_object in_obj[2];
 	struct acpi_object_list args = { 2, in_obj };

 	in_obj[0].type          = ACPI_TYPE_INTEGER;
 	in_obj[0].integer.value = reg;
 	in_obj[1].type          = ACPI_TYPE_INTEGER;
 	in_obj[1].integer.value = val;

 	if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
 		return -EINVAL;

 	return 0;
 }

 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
 {
 	lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
 	pr_info("hardware type %s found\n", dmi->ident);

 	return 1;
 }

 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
  * If the value is negative, the opposite of the hw value is used. */
 #define DEFINE_CONV(name, x, y, z)			      \
 	static union axis_conversion lis3lv02d_axis_##name = \
 		{ .as_array = { x, y, z } }
 DEFINE_CONV(normal, 1, 2, 3);
 DEFINE_CONV(y_inverted, 1, -2, 3);
 DEFINE_CONV(x_inverted, -1, 2, 3);
 DEFINE_CONV(x_inverted_usd, -1, 2, -3);
 DEFINE_CONV(z_inverted, 1, 2, -3);
 DEFINE_CONV(xy_swap, 2, 1, 3);
 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);

 #define AXIS_DMI_MATCH(_ident, _name, _axis) {		\
 	.ident = _ident,				\
 	.callback = lis3lv02d_dmi_matched,		\
 	.matches = {					\
 		DMI_MATCH(DMI_PRODUCT_NAME, _name)	\
 	},						\
 	.driver_data = &lis3lv02d_axis_##_axis		\
 }

 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,	\
 				_class2, _name2,	\
 				_axis) {		\
 	.ident = _ident,				\
 	.callback = lis3lv02d_dmi_matched,		\
 	.matches = {					\
 		DMI_MATCH(DMI_##_class1, _name1),	\
 		DMI_MATCH(DMI_##_class2, _name2),	\
 	},						\
 	.driver_data = &lis3lv02d_axis_##_axis		\
 }
 static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
 	/* product names are truncated to match all kinds of a same model */
 	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
 	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
 	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
 	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
 	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
 	AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
 	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
 	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
 	AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
 	AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
 	AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
 	AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
 	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
 	AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
 	AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
 	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
 	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
 	AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
 	AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
 	/* Intel-based HP Pavilion dv5 */
 	AXIS_DMI_MATCH2("HPDV5_I",
 			PRODUCT_NAME, "HP Pavilion dv5",
 			BOARD_NAME, "3603",
 			x_inverted),
 	/* AMD-based HP Pavilion dv5 */
 	AXIS_DMI_MATCH2("HPDV5_A",
 			PRODUCT_NAME, "HP Pavilion dv5",
 			BOARD_NAME, "3600",
 			y_inverted),
 	AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
 	AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
 	AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
 	AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
 	AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
 	AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
 	AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
 	AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
 	AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
 	AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
 	AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
 	AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
 	AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
 	AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
 	AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
 	AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
 	AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
 	AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
 	AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
 	AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
 	{ NULL, }
 /* Laptop models without axis info (yet):
  * "NC6910" "HP Compaq 6910"
  * "NC2400" "HP Compaq nc2400"
  * "NX74x0" "HP Compaq nx74"
  * "NX6325" "HP Compaq nx6325"
  * "NC4400" "HP Compaq nc4400"
  */
 };

 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
 {
 	struct acpi_device *dev = lis3_dev.bus_priv;
 	unsigned long long ret; /* Not used when writing */
 	union acpi_object in_obj[1];
 	struct acpi_object_list args = { 1, in_obj };

 	in_obj[0].type          = ACPI_TYPE_INTEGER;
 	in_obj[0].integer.value = !!value;

 	acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
 }

 static struct delayed_led_classdev hpled_led = {
 	.led_classdev = {
 		.name			= "hp::hddprotect",
 		.default_trigger	= "none",
 		.brightness_set		= delayed_sysfs_set,
 		.flags                  = LED_CORE_SUSPENDRESUME,
 	},
 	.set_brightness = hpled_set,
 };

 static acpi_status
 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
 {
 	if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
 		struct acpi_resource_extended_irq *irq;
 		u32 *device_irq = context;

 		irq = &resource->data.extended_irq;
 		*device_irq = irq->interrupts[0];
 	}

 	return AE_OK;
 }

 static void lis3lv02d_enum_resources(struct acpi_device *device)
 {
 	acpi_status status;

 	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 					lis3lv02d_get_resource, &lis3_dev.irq);
 	if (ACPI_FAILURE(status))
 		printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
 }

 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
 				  struct serio *port)
 {
 	static bool extended;

 	if (str & I8042_STR_AUXDATA)
 		return false;

 	if (data == 0xe0) {
 		extended = true;
 		return true;
 	} else if (unlikely(extended)) {
 		extended = false;

 		switch (data) {
 		case ACCEL_1:
 		case ACCEL_2:
 		case ACCEL_3:
 		case ACCEL_4:
 			return true;
 		default:
 			serio_interrupt(port, 0xe0, 0);
 			return false;
 		}
 	}

 	return false;
 }

 static int lis3lv02d_add(struct acpi_device *device)
 {
 	int ret;

 	if (!device)
 		return -EINVAL;

 	lis3_dev.bus_priv = device;
 	lis3_dev.init = lis3lv02d_acpi_init;
 	lis3_dev.read = lis3lv02d_acpi_read;
 	lis3_dev.write = lis3lv02d_acpi_write;
 	strcpy(acpi_device_name(device), DRIVER_NAME);
 	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
 	device->driver_data = &lis3_dev;

 	/* obtain IRQ number of our device from ACPI */
 	lis3lv02d_enum_resources(device);

 	/* If possible use a "standard" axes order */
 	if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
 		pr_info("Using custom axes %d,%d,%d\n",
 			lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
 	} else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
 		pr_info("laptop model unknown, using default axes configuration\n");
 		lis3_dev.ac = lis3lv02d_axis_normal;
 	}

 	/* call the core layer do its init */
 	lis3_dev.init_required = true;
 	ret = lis3lv02d_init_device(&lis3_dev);
 	if (ret)
 		return ret;

 	/* filter to remove HPQ6000 accelerometer data
 	 * from keyboard bus stream */
 	if (strstr(dev_name(&device->dev), "HPQ6000"))
 		i8042_install_filter(hp_accel_i8042_filter);

 	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
 	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
 	if (ret) {
 		lis3lv02d_joystick_disable(&lis3_dev);
 		lis3lv02d_poweroff(&lis3_dev);
 		flush_work(&hpled_led.work);
 		return ret;
 	}

 	return ret;
 }

 static int lis3lv02d_remove(struct acpi_device *device)
 {
 	if (!device)
 		return -EINVAL;

 	i8042_remove_filter(hp_accel_i8042_filter);
 	lis3lv02d_joystick_disable(&lis3_dev);
 	lis3lv02d_poweroff(&lis3_dev);

 	led_classdev_unregister(&hpled_led.led_classdev);
 	flush_work(&hpled_led.work);

 	return lis3lv02d_remove_fs(&lis3_dev);
 }


 #ifdef CONFIG_PM_SLEEP
 static int lis3lv02d_suspend(struct device *dev)
 {
 	/* make sure the device is off when we suspend */
 	lis3lv02d_poweroff(&lis3_dev);
 	return 0;
 }

 static int lis3lv02d_resume(struct device *dev)
 {
 	lis3_dev.init_required = false;
 	lis3lv02d_poweron(&lis3_dev);
 	return 0;
 }

 static int lis3lv02d_restore(struct device *dev)
 {
 	lis3_dev.init_required = true;
 	lis3lv02d_poweron(&lis3_dev);
 	return 0;
 }

 static const struct dev_pm_ops hp_accel_pm = {
 	.suspend = lis3lv02d_suspend,
 	.resume = lis3lv02d_resume,
 	.freeze = lis3lv02d_suspend,
 	.thaw = lis3lv02d_resume,
 	.poweroff = lis3lv02d_suspend,
 	.restore = lis3lv02d_restore,
 };

 #define HP_ACCEL_PM (&hp_accel_pm)
 #else
 #define HP_ACCEL_PM NULL
 #endif

 /* For the HP MDPS aka 3D Driveguard */
 static struct acpi_driver lis3lv02d_driver = {
 	.name  = DRIVER_NAME,
 	.class = ACPI_MDPS_CLASS,
 	.ids   = lis3lv02d_device_ids,
 	.ops = {
 		.add     = lis3lv02d_add,
 		.remove  = lis3lv02d_remove,
 	},
 	.drv.pm = HP_ACCEL_PM,
 };
 module_acpi_driver(lis3lv02d_driver);

 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
	*
	* Copyright (C) 2007-2008 Yan Burman
	* Copyright (C) 2008 Eric Piel
	* Copyright (C) 2008-2009 Pavel Machek
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/dmi.h>
	#include <linux/module.h>
	#include <linux/types.h>
	#include <linux/platform_device.h>
	#include <linux/interrupt.h>
	#include <linux/delay.h>
	#include <linux/wait.h>
	#include <linux/poll.h>
	#include <linux/freezer.h>
	#include <linux/uaccess.h>
	#include <linux/leds.h>
	#include <linux/atomic.h>
	#include <linux/acpi.h>
	#include <linux/i8042.h>
	#include <linux/serio.h>
	#include "../../misc/lis3lv02d/lis3lv02d.h"

	#define DRIVER_NAME "hp_accel"
	#define ACPI_MDPS_CLASS "accelerometer"

	/* Delayed LEDs infrastructure ------------------------------------ */

	/* Special LED class that can defer work */
	struct delayed_led_classdev {
	struct led_classdev led_classdev;
	struct work_struct work;
	enum led_brightness new_brightness;

	unsigned int led; /* For driver */
	void (set_brightness)(struct delayed_led_classdev data, enum led_brightness value);
	};

	static inline void delayed_set_status_worker(struct work_struct *work)
	{
	struct delayed_led_classdev *data =
	container_of(work, struct delayed_led_classdev, work);

	data->set_brightness(data, data->new_brightness);
	}

	static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
	enum led_brightness brightness)
	{
	struct delayed_led_classdev *data = container_of(led_cdev,
	struct delayed_led_classdev, led_classdev);
	data->new_brightness = brightness;
	schedule_work(&data->work);
	}

	/* HP-specific accelerometer driver ------------------------------------ */

	/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
	* HPQ6000 sends through the keyboard bus */
	#define ACCEL_1 0x25
	#define ACCEL_2 0x26
	#define ACCEL_3 0x27
	#define ACCEL_4 0x28

	/* For automatic insertion of the module */
	static const struct acpi_device_id lis3lv02d_device_ids[] = {
	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	{"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
	{"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
	{"", 0},
	};
	MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);


	/**
	* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
	* @lis3: pointer to the device struct
	*
	* Returns 0 on success.
	*/
	static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
	{
	struct acpi_device *dev = lis3->bus_priv;
	if (!lis3->init_required)
	return 0;

	if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
	NULL, NULL) != AE_OK)
	return -EINVAL;

	return 0;
	}

	/**
	* lis3lv02d_acpi_read - ACPI ALRD method: read a register
	* @lis3: pointer to the device struct
	* @reg: the register to read
	* @ret: result of the operation
	*
	* Returns 0 on success.
	*/
	static int lis3lv02d_acpi_read(struct lis3lv02d lis3, int reg, u8 ret)
	{
	struct acpi_device *dev = lis3->bus_priv;
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
	unsigned long long lret;
	acpi_status status;

	arg0.integer.value = reg;

	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
	if (ACPI_FAILURE(status))
	return -EINVAL;
	*ret = lret;
	return 0;
	}

	/**
	* lis3lv02d_acpi_write - ACPI ALWR method: write to a register
	* @lis3: pointer to the device struct
	* @reg: the register to write to
	* @val: the value to write
	*
	* Returns 0 on success.
	*/
	static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
	{
	struct acpi_device *dev = lis3->bus_priv;
	unsigned long long ret; /* Not used when writting */
	union acpi_object in_obj[2];
	struct acpi_object_list args = { 2, in_obj };

	in_obj[0].type = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = reg;
	in_obj[1].type = ACPI_TYPE_INTEGER;
	in_obj[1].integer.value = val;

	if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
	return -EINVAL;

	return 0;
	}

	static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
	{
	lis3_dev.ac = ((union axis_conversion )dmi->driver_data);
	pr_info("hardware type %s found\n", dmi->ident);

	return 1;
	}

	/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
	* If the value is negative, the opposite of the hw value is used. */
	#define DEFINE_CONV(name, x, y, z) \
	static union axis_conversion lis3lv02d_axis_##name = \
	{ .as_array = { x, y, z } }
	DEFINE_CONV(normal, 1, 2, 3);
	DEFINE_CONV(y_inverted, 1, -2, 3);
	DEFINE_CONV(x_inverted, -1, 2, 3);
	DEFINE_CONV(x_inverted_usd, -1, 2, -3);
	DEFINE_CONV(z_inverted, 1, 2, -3);
	DEFINE_CONV(xy_swap, 2, 1, 3);
	DEFINE_CONV(xy_rotated_left, -2, 1, 3);
	DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
	DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
	DEFINE_CONV(xy_rotated_right, 2, -1, 3);
	DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);

	#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
	.ident = _ident, \
	.callback = lis3lv02d_dmi_matched, \
	.matches = { \
	DMI_MATCH(DMI_PRODUCT_NAME, _name) \
	}, \
	.driver_data = &lis3lv02d_axis_##_axis \
	}

	#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
	_class2, _name2, \
	_axis) { \
	.ident = _ident, \
	.callback = lis3lv02d_dmi_matched, \
	.matches = { \
	DMI_MATCH(DMI_##_class1, _name1), \
	DMI_MATCH(DMI_##_class2, _name2), \
	}, \
	.driver_data = &lis3lv02d_axis_##_axis \
	}
	static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
	/* product names are truncated to match all kinds of a same model */
	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
	AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
	AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
	AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
	AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
	AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
	AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
	AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
	AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
	AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
	/* Intel-based HP Pavilion dv5 */
	AXIS_DMI_MATCH2("HPDV5_I",
	PRODUCT_NAME, "HP Pavilion dv5",
	BOARD_NAME, "3603",
	x_inverted),
	/* AMD-based HP Pavilion dv5 */
	AXIS_DMI_MATCH2("HPDV5_A",
	PRODUCT_NAME, "HP Pavilion dv5",
	BOARD_NAME, "3600",
	y_inverted),
	AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
	AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
	AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
	AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
	AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
	AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
	AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
	AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
	AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
	AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
	AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
	AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
	AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
	AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
	AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
	AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
	AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
	AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
	AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
	AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
	{ NULL, }
	/* Laptop models without axis info (yet):
	* "NC6910" "HP Compaq 6910"
	* "NC2400" "HP Compaq nc2400"
	* "NX74x0" "HP Compaq nx74"
	* "NX6325" "HP Compaq nx6325"
	* "NC4400" "HP Compaq nc4400"
	*/
	};

	static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
	{
	struct acpi_device *dev = lis3_dev.bus_priv;
	unsigned long long ret; /* Not used when writing */
	union acpi_object in_obj[1];
	struct acpi_object_list args = { 1, in_obj };

	in_obj[0].type = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = !!value;

	acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
	}

	static struct delayed_led_classdev hpled_led = {
	.led_classdev = {
	.name = "hp::hddprotect",
	.default_trigger = "none",
	.brightness_set = delayed_sysfs_set,
	.flags = LED_CORE_SUSPENDRESUME,
	},
	.set_brightness = hpled_set,
	};

	static acpi_status
	lis3lv02d_get_resource(struct acpi_resource resource, void context)
	{
	if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
	struct acpi_resource_extended_irq *irq;
	u32 *device_irq = context;

	irq = &resource->data.extended_irq;
	*device_irq = irq->interrupts[0];
	}

	return AE_OK;
	}

	static void lis3lv02d_enum_resources(struct acpi_device *device)
	{
	acpi_status status;

	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
	lis3lv02d_get_resource, &lis3_dev.irq);
	if (ACPI_FAILURE(status))
	printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
	}

	static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
	struct serio *port)
	{
	static bool extended;

	if (str & I8042_STR_AUXDATA)
	return false;

	if (data == 0xe0) {
	extended = true;
	return true;
	} else if (unlikely(extended)) {
	extended = false;

	switch (data) {
	case ACCEL_1:
	case ACCEL_2:
	case ACCEL_3:
	case ACCEL_4:
	return true;
	default:
	serio_interrupt(port, 0xe0, 0);
	return false;
	}
	}

	return false;
	}

	static int lis3lv02d_add(struct acpi_device *device)
	{
	int ret;

	if (!device)
	return -EINVAL;

	lis3_dev.bus_priv = device;
	lis3_dev.init = lis3lv02d_acpi_init;
	lis3_dev.read = lis3lv02d_acpi_read;
	lis3_dev.write = lis3lv02d_acpi_write;
	strcpy(acpi_device_name(device), DRIVER_NAME);
	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
	device->driver_data = &lis3_dev;

	/* obtain IRQ number of our device from ACPI */
	lis3lv02d_enum_resources(device);

	/* If possible use a "standard" axes order */
	if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
	pr_info("Using custom axes %d,%d,%d\n",
	lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
	} else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
	pr_info("laptop model unknown, using default axes configuration\n");
	lis3_dev.ac = lis3lv02d_axis_normal;
	}

	/* call the core layer do its init */
	lis3_dev.init_required = true;
	ret = lis3lv02d_init_device(&lis3_dev);
	if (ret)
	return ret;

	/* filter to remove HPQ6000 accelerometer data
	* from keyboard bus stream */
	if (strstr(dev_name(&device->dev), "HPQ6000"))
	i8042_install_filter(hp_accel_i8042_filter);

	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
	if (ret) {
	lis3lv02d_joystick_disable(&lis3_dev);
	lis3lv02d_poweroff(&lis3_dev);
	flush_work(&hpled_led.work);
	return ret;
	}

	return ret;
	}

	static int lis3lv02d_remove(struct acpi_device *device)
	{
	if (!device)
	return -EINVAL;

	i8042_remove_filter(hp_accel_i8042_filter);
	lis3lv02d_joystick_disable(&lis3_dev);
	lis3lv02d_poweroff(&lis3_dev);

	led_classdev_unregister(&hpled_led.led_classdev);
	flush_work(&hpled_led.work);

	return lis3lv02d_remove_fs(&lis3_dev);
	}


	#ifdef CONFIG_PM_SLEEP
	static int lis3lv02d_suspend(struct device *dev)
	{
	/* make sure the device is off when we suspend */
	lis3lv02d_poweroff(&lis3_dev);
	return 0;
	}

	static int lis3lv02d_resume(struct device *dev)
	{
	lis3_dev.init_required = false;
	lis3lv02d_poweron(&lis3_dev);
	return 0;
	}

	static int lis3lv02d_restore(struct device *dev)
	{
	lis3_dev.init_required = true;
	lis3lv02d_poweron(&lis3_dev);
	return 0;
	}

	static const struct dev_pm_ops hp_accel_pm = {
	.suspend = lis3lv02d_suspend,
	.resume = lis3lv02d_resume,
	.freeze = lis3lv02d_suspend,
	.thaw = lis3lv02d_resume,
	.poweroff = lis3lv02d_suspend,
	.restore = lis3lv02d_restore,
	};

	#define HP_ACCEL_PM (&hp_accel_pm)
	#else
	#define HP_ACCEL_PM NULL
	#endif

	/* For the HP MDPS aka 3D Driveguard */
	static struct acpi_driver lis3lv02d_driver = {
	.name = DRIVER_NAME,
	.class = ACPI_MDPS_CLASS,
	.ids = lis3lv02d_device_ids,
	.ops = {
	.add = lis3lv02d_add,
	.remove = lis3lv02d_remove,
	},
	.drv.pm = HP_ACCEL_PM,
	};
	module_acpi_driver(lis3lv02d_driver);

	MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
	MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
	MODULE_LICENSE("GPL");