90ab5ee941
module_param(bool) used to counter-intuitively take an int. In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.
It's time to remove the int/unsigned int option. For this version
it'll simply give a warning, but it'll break next kernel version.
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
158 lines
3.4 KiB
C
158 lines
3.4 KiB
C
/*
|
|
* Apple Motion Sensor driver (joystick emulation)
|
|
*
|
|
* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
|
|
* Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "ams.h"
|
|
|
|
static bool joystick;
|
|
module_param(joystick, bool, S_IRUGO);
|
|
MODULE_PARM_DESC(joystick, "Enable the input class device on module load");
|
|
|
|
static bool invert;
|
|
module_param(invert, bool, S_IWUSR | S_IRUGO);
|
|
MODULE_PARM_DESC(invert, "Invert input data on X and Y axis");
|
|
|
|
static DEFINE_MUTEX(ams_input_mutex);
|
|
|
|
static void ams_idev_poll(struct input_polled_dev *dev)
|
|
{
|
|
struct input_dev *idev = dev->input;
|
|
s8 x, y, z;
|
|
|
|
mutex_lock(&ams_info.lock);
|
|
|
|
ams_sensors(&x, &y, &z);
|
|
|
|
x -= ams_info.xcalib;
|
|
y -= ams_info.ycalib;
|
|
z -= ams_info.zcalib;
|
|
|
|
input_report_abs(idev, ABS_X, invert ? -x : x);
|
|
input_report_abs(idev, ABS_Y, invert ? -y : y);
|
|
input_report_abs(idev, ABS_Z, z);
|
|
|
|
input_sync(idev);
|
|
|
|
mutex_unlock(&ams_info.lock);
|
|
}
|
|
|
|
/* Call with ams_info.lock held! */
|
|
static int ams_input_enable(void)
|
|
{
|
|
struct input_dev *input;
|
|
s8 x, y, z;
|
|
int error;
|
|
|
|
ams_sensors(&x, &y, &z);
|
|
ams_info.xcalib = x;
|
|
ams_info.ycalib = y;
|
|
ams_info.zcalib = z;
|
|
|
|
ams_info.idev = input_allocate_polled_device();
|
|
if (!ams_info.idev)
|
|
return -ENOMEM;
|
|
|
|
ams_info.idev->poll = ams_idev_poll;
|
|
ams_info.idev->poll_interval = 25;
|
|
|
|
input = ams_info.idev->input;
|
|
input->name = "Apple Motion Sensor";
|
|
input->id.bustype = ams_info.bustype;
|
|
input->id.vendor = 0;
|
|
input->dev.parent = &ams_info.of_dev->dev;
|
|
|
|
input_set_abs_params(input, ABS_X, -50, 50, 3, 0);
|
|
input_set_abs_params(input, ABS_Y, -50, 50, 3, 0);
|
|
input_set_abs_params(input, ABS_Z, -50, 50, 3, 0);
|
|
|
|
set_bit(EV_ABS, input->evbit);
|
|
set_bit(EV_KEY, input->evbit);
|
|
set_bit(BTN_TOUCH, input->keybit);
|
|
|
|
error = input_register_polled_device(ams_info.idev);
|
|
if (error) {
|
|
input_free_polled_device(ams_info.idev);
|
|
ams_info.idev = NULL;
|
|
return error;
|
|
}
|
|
|
|
joystick = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ams_input_disable(void)
|
|
{
|
|
if (ams_info.idev) {
|
|
input_unregister_polled_device(ams_info.idev);
|
|
input_free_polled_device(ams_info.idev);
|
|
ams_info.idev = NULL;
|
|
}
|
|
|
|
joystick = 0;
|
|
}
|
|
|
|
static ssize_t ams_input_show_joystick(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", joystick);
|
|
}
|
|
|
|
static ssize_t ams_input_store_joystick(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
unsigned long enable;
|
|
int error = 0;
|
|
|
|
if (strict_strtoul(buf, 0, &enable) || enable > 1)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&ams_input_mutex);
|
|
|
|
if (enable != joystick) {
|
|
if (enable)
|
|
error = ams_input_enable();
|
|
else
|
|
ams_input_disable();
|
|
}
|
|
|
|
mutex_unlock(&ams_input_mutex);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static DEVICE_ATTR(joystick, S_IRUGO | S_IWUSR,
|
|
ams_input_show_joystick, ams_input_store_joystick);
|
|
|
|
int ams_input_init(void)
|
|
{
|
|
if (joystick)
|
|
ams_input_enable();
|
|
|
|
return device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick);
|
|
}
|
|
|
|
void ams_input_exit(void)
|
|
{
|
|
device_remove_file(&ams_info.of_dev->dev, &dev_attr_joystick);
|
|
|
|
mutex_lock(&ams_input_mutex);
|
|
ams_input_disable();
|
|
mutex_unlock(&ams_input_mutex);
|
|
}
|