drivers/hwmon/hp_accel.c - kernel/msm-5.4 - Gitiles

 /*
  *  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 Pavel Machek
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */

 #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/input.h>
 #include <linux/kthread.h>
 #include <linux/semaphore.h>
 #include <linux/delay.h>
 #include <linux/wait.h>
 #include <linux/poll.h>
 #include <linux/freezer.h>
 #include <linux/version.h>
 #include <linux/uaccess.h>
 #include <acpi/acpi_drivers.h>
 #include <asm/atomic.h>
 #include "lis3lv02d.h"

 #define DRIVER_NAME     "lis3lv02d"
 #define ACPI_MDPS_CLASS "accelerometer"


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


 /**
  * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
  * @handle: the handle of the device
  *
  * Returns AE_OK on success.
  */
 acpi_status lis3lv02d_acpi_init(acpi_handle handle)
 {
 	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
 }

 /**
  * lis3lv02d_acpi_read - ACPI ALRD method: read a register
  * @handle: the handle of the device
  * @reg:    the register to read
  * @ret:    result of the operation
  *
  * Returns AE_OK on success.
  */
 acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
 {
 	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(handle, "ALRD", &args, &lret);
 	*ret = lret;
 	return status;
 }

 /**
  * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
  * @handle: the handle of the device
  * @reg:    the register to write to
  * @val:    the value to write
  *
  * Returns AE_OK on success.
  */
 acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
 {
 	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;

 	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
 }

 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
 {
 	adev.ac = *((struct axis_conversion *)dmi->driver_data);
 	printk(KERN_INFO DRIVER_NAME ": 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. */
 static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
 static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
 static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
 static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
 static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
 static struct axis_conversion lis3lv02d_axis_xy_swap_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		\
 }
 static 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("NC8510", "HP Compaq 8510", xy_swap_inverted),
 	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
 	{ NULL, }
 /* Laptop models without axis info (yet):
  * "NC651xx" "HP Compaq 651"
  * "NC671xx" "HP Compaq 671"
  * "NC6910" "HP Compaq 6910"
  * HP Compaq 8710x Notebook PC / Mobile Workstation
  * "NC2400" "HP Compaq nc2400"
  * "NX74x0" "HP Compaq nx74"
  * "NX6325" "HP Compaq nx6325"
  * "NC4400" "HP Compaq nc4400"
  */
 };


 static int lis3lv02d_add(struct acpi_device *device)
 {
 	u8 val;

 	if (!device)
 		return -EINVAL;

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

 	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
 	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
 		printk(KERN_ERR DRIVER_NAME
 				": Accelerometer chip not LIS3LV02D{L,Q}\n");
 	}

 	/* If possible use a "standard" axes order */
 	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
 		printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
 				 "using default axes configuration\n");
 		adev.ac = lis3lv02d_axis_normal;
 	}

 	return lis3lv02d_init_device(&adev);
 }

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

 	lis3lv02d_joystick_disable();
 	lis3lv02d_poweroff(device->handle);

 	return lis3lv02d_remove_fs();
 }


 #ifdef CONFIG_PM
 static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
 {
 	/* make sure the device is off when we suspend */
 	lis3lv02d_poweroff(device->handle);
 	return 0;
 }

 static int lis3lv02d_resume(struct acpi_device *device)
 {
 	/* put back the device in the right state (ACPI might turn it on) */
 	mutex_lock(&adev.lock);
 	if (adev.usage > 0)
 		lis3lv02d_poweron(device->handle);
 	else
 		lis3lv02d_poweroff(device->handle);
 	mutex_unlock(&adev.lock);
 	return 0;
 }
 #else
 #define lis3lv02d_suspend NULL
 #define lis3lv02d_resume 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,
 		.suspend = lis3lv02d_suspend,
 		.resume  = lis3lv02d_resume,
 	}
 };

 static int __init lis3lv02d_init_module(void)
 {
 	int ret;

 	if (acpi_disabled)
 		return -ENODEV;

 	ret = acpi_bus_register_driver(&lis3lv02d_driver);
 	if (ret < 0)
 		return ret;

 	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");

 	return 0;
 }

 static void __exit lis3lv02d_exit_module(void)
 {
 	acpi_bus_unregister_driver(&lis3lv02d_driver);
 }

 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
 MODULE_LICENSE("GPL");

 module_init(lis3lv02d_init_module);
 module_exit(lis3lv02d_exit_module);
	/*
	* 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 Pavel Machek
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	#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/input.h>
	#include <linux/kthread.h>
	#include <linux/semaphore.h>
	#include <linux/delay.h>
	#include <linux/wait.h>
	#include <linux/poll.h>
	#include <linux/freezer.h>
	#include <linux/version.h>
	#include <linux/uaccess.h>
	#include <acpi/acpi_drivers.h>
	#include <asm/atomic.h>
	#include "lis3lv02d.h"

	#define DRIVER_NAME "lis3lv02d"
	#define ACPI_MDPS_CLASS "accelerometer"


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


	/**
	* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
	* @handle: the handle of the device
	*
	* Returns AE_OK on success.
	*/
	acpi_status lis3lv02d_acpi_init(acpi_handle handle)
	{
	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
	}

	/**
	* lis3lv02d_acpi_read - ACPI ALRD method: read a register
	* @handle: the handle of the device
	* @reg: the register to read
	* @ret: result of the operation
	*
	* Returns AE_OK on success.
	*/
	acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
	{
	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(handle, "ALRD", &args, &lret);
	*ret = lret;
	return status;
	}

	/**
	* lis3lv02d_acpi_write - ACPI ALWR method: write to a register
	* @handle: the handle of the device
	* @reg: the register to write to
	* @val: the value to write
	*
	* Returns AE_OK on success.
	*/
	acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
	{
	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;

	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
	}

	static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
	{
	adev.ac = ((struct axis_conversion )dmi->driver_data);
	printk(KERN_INFO DRIVER_NAME ": 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. */
	static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
	static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
	static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
	static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
	static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
	static struct axis_conversion lis3lv02d_axis_xy_swap_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 \
	}
	static 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("NC8510", "HP Compaq 8510", xy_swap_inverted),
	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
	{ NULL, }
	/* Laptop models without axis info (yet):
	* "NC651xx" "HP Compaq 651"
	* "NC671xx" "HP Compaq 671"
	* "NC6910" "HP Compaq 6910"
	* HP Compaq 8710x Notebook PC / Mobile Workstation
	* "NC2400" "HP Compaq nc2400"
	* "NX74x0" "HP Compaq nx74"
	* "NX6325" "HP Compaq nx6325"
	* "NC4400" "HP Compaq nc4400"
	*/
	};


	static int lis3lv02d_add(struct acpi_device *device)
	{
	u8 val;

	if (!device)
	return -EINVAL;

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

	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
	printk(KERN_ERR DRIVER_NAME
	": Accelerometer chip not LIS3LV02D{L,Q}\n");
	}

	/* If possible use a "standard" axes order */
	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
	printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
	"using default axes configuration\n");
	adev.ac = lis3lv02d_axis_normal;
	}

	return lis3lv02d_init_device(&adev);
	}

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

	lis3lv02d_joystick_disable();
	lis3lv02d_poweroff(device->handle);

	return lis3lv02d_remove_fs();
	}


	#ifdef CONFIG_PM
	static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
	{
	/* make sure the device is off when we suspend */
	lis3lv02d_poweroff(device->handle);
	return 0;
	}

	static int lis3lv02d_resume(struct acpi_device *device)
	{
	/* put back the device in the right state (ACPI might turn it on) */
	mutex_lock(&adev.lock);
	if (adev.usage > 0)
	lis3lv02d_poweron(device->handle);
	else
	lis3lv02d_poweroff(device->handle);
	mutex_unlock(&adev.lock);
	return 0;
	}
	#else
	#define lis3lv02d_suspend NULL
	#define lis3lv02d_resume 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,
	.suspend = lis3lv02d_suspend,
	.resume = lis3lv02d_resume,
	}
	};

	static int __init lis3lv02d_init_module(void)
	{
	int ret;

	if (acpi_disabled)
	return -ENODEV;

	ret = acpi_bus_register_driver(&lis3lv02d_driver);
	if (ret < 0)
	return ret;

	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");

	return 0;
	}

	static void __exit lis3lv02d_exit_module(void)
	{
	acpi_bus_unregister_driver(&lis3lv02d_driver);
	}

	MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
	MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
	MODULE_LICENSE("GPL");

	module_init(lis3lv02d_init_module);
	module_exit(lis3lv02d_exit_module);