1ccd7a2a33
This adds a dummy driver that will support user-space I/O drivers for the HID subsystem. This allows to write transport-level drivers like USB-HID and Bluetooth-HID in user-space. Low-Energy Bluetooth needs this to feed HID data that is parsed in user-space back into the kernel. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/*
|
|
* User-space I/O driver support for HID subsystem
|
|
* Copyright (c) 2012 David Herrmann
|
|
*/
|
|
|
|
/*
|
|
* 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/atomic.h>
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/input.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/uhid.h>
|
|
#include <linux/wait.h>
|
|
|
|
#define UHID_NAME "uhid"
|
|
|
|
static struct miscdevice uhid_misc;
|
|
|
|
static int uhid_char_open(struct inode *inode, struct file *file)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int uhid_char_release(struct inode *inode, struct file *file)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t uhid_char_read(struct file *file, char __user *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t uhid_char_write(struct file *file, const char __user *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int uhid_char_poll(struct file *file, poll_table *wait)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations uhid_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = uhid_char_open,
|
|
.release = uhid_char_release,
|
|
.read = uhid_char_read,
|
|
.write = uhid_char_write,
|
|
.poll = uhid_char_poll,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static struct miscdevice uhid_misc = {
|
|
.fops = &uhid_fops,
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = UHID_NAME,
|
|
};
|
|
|
|
static int __init uhid_init(void)
|
|
{
|
|
return misc_register(&uhid_misc);
|
|
}
|
|
|
|
static void __exit uhid_exit(void)
|
|
{
|
|
misc_deregister(&uhid_misc);
|
|
}
|
|
|
|
module_init(uhid_init);
|
|
module_exit(uhid_exit);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
|
|
MODULE_DESCRIPTION("User-space I/O driver support for HID subsystem");
|