mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 12:42:02 +00:00
0c444d98ef
Now that instances of input_dev support polling mode natively, we no longer need to create input_polled_dev instance. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191002214854.GA114387@dtor-ws
157 lines
3.1 KiB
C
157 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Apple Motion Sensor driver (joystick emulation)
|
|
*
|
|
* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
|
|
* Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
|
|
*/
|
|
|
|
#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_dev *idev)
|
|
{
|
|
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;
|
|
|
|
input = input_allocate_device();
|
|
if (!input)
|
|
return -ENOMEM;
|
|
|
|
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);
|
|
input_set_capability(input, EV_KEY, BTN_TOUCH);
|
|
|
|
error = input_setup_polling(input, ams_idev_poll);
|
|
if (error)
|
|
goto err_free_input;
|
|
|
|
input_set_poll_interval(input, 25);
|
|
|
|
error = input_register_device(input);
|
|
if (error)
|
|
goto err_free_input;
|
|
|
|
ams_info.idev = input;
|
|
joystick = true;
|
|
|
|
return 0;
|
|
|
|
err_free_input:
|
|
input_free_device(input);
|
|
return error;
|
|
}
|
|
|
|
static void ams_input_disable(void)
|
|
{
|
|
if (ams_info.idev) {
|
|
input_unregister_device(ams_info.idev);
|
|
ams_info.idev = NULL;
|
|
}
|
|
|
|
joystick = false;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
|
|
ret = kstrtoul(buf, 0, &enable);
|
|
if (ret)
|
|
return ret;
|
|
if (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);
|
|
}
|