path: root/drivers/platform/x86/classmate-laptop.c

/*
 *  Copyright (C) 2009  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */


#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <acpi/acpi_drivers.h>
#include <linux/backlight.h>
#include <linux/input.h>
#include <linux/rfkill.h>

MODULE_LICENSE("GPL");


struct cmpc_accel {
	int sensitivity;
	int g_select;
	int inputdev_state;
};

#define CMPC_ACCEL_DEV_STATE_CLOSED	0
#define CMPC_ACCEL_DEV_STATE_OPEN	1

#define CMPC_ACCEL_SENSITIVITY_DEFAULT		5
#define CMPC_ACCEL_G_SELECT_DEFAULT		0

#define CMPC_ACCEL_HID		"ACCE0000"
#define CMPC_ACCEL_HID_V4	"ACCE0001"
#define CMPC_TABLET_HID		"TBLT0000"
#define CMPC_IPML_HID	"IPML200"
#define CMPC_KEYS_HID		"FNBT0000"

/*
 * Generic input device code.
 */

typedef void (*input_device_init)(struct input_dev *dev);

static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
				       input_device_init idev_init)
{
	struct input_dev *inputdev;
	int error;

	inputdev = input_allocate_device();
	if (!inputdev)
		return -ENOMEM;
	inputdev->name = name;
	inputdev->dev.parent = &acpi->dev;
	idev_init(inputdev);
	error = input_register_device(inputdev);
	if (error) {
		input_free_device(inputdev);
		return error;
	}
	dev_set_drvdata(&acpi->dev, inputdev);
	return 0;
}

static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
{
	struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
	input_unregister_device(inputdev);
	return 0;
}

/*
 * Accelerometer code for Classmate V4
 */
static acpi_status cmpc_start_accel_v4(acpi_handle handle)
{
	union acpi_object param[4];
	struct acpi_object_list input;
	acpi_status status;

	param[0].type = ACPI_TYPE_INTEGER;
	param[0].integer.value = 0x3;
	param[1].type = ACPI_TYPE_INTEGER;
	param[1].integer.value = 0;
	param[2].type = ACPI_TYPE_INTEGER;
	param[2].integer.value = 0;
	param[3].type = ACPI_TYPE_INTEGER;
	param[3].integer.value = 0;
	input.count = 4;
	input.pointer = param;
	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
	return status;
}

static acpi_status cmpc_stop_accel_v4(acpi_handle handle)
{
	union acpi_object param[4];
	struct acpi_object_list input;
	acpi_status status;

	param[0].type = ACPI_TYPE_INTEGER;
	param[0].integer.value = 0x4;
	param[1].type = ACPI_TYPE_INTEGER;
	param[1].integer.value = 0;
	param[2].type = ACPI_TYPE_INTEGER;
	param[2].integer.value = 0;
	param[3].type = ACPI_TYPE_INTEGER;
	param[3].integer.value = 0;