linux/drivers/input/serio/userio.c

/*
 * userio kernel serio device emulation module
 * Copyright (C) 2015 Red Hat
 * Copyright (C) 2015 Stephen Chandler Paul <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser
 * General Public License for more details.
 */

#include <linux/circ_buf.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/serio.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/sched.h>
#include <linux/poll.h>
#include <uapi/linux/userio.h>

#define USERIO_NAME …
#define USERIO_BUFSIZE …

static struct miscdevice userio_misc;

struct userio_device { … };

/**
 * userio_device_write - Write data from serio to a userio device in userspace
 * @id: The serio port for the userio device
 * @val: The data to write to the device
 */
static int userio_device_write(struct serio *id, unsigned char val)
{ … }

static int userio_char_open(struct inode *inode, struct file *file)
{ … }

static int userio_char_release(struct inode *inode, struct file *file)
{ … }

static ssize_t userio_char_read(struct file *file, char __user *user_buffer,
				size_t count, loff_t *ppos)
{ … }

static ssize_t userio_char_write(struct file *file, const char __user *buffer,
				 size_t count, loff_t *ppos)
{ … }

static __poll_t userio_char_poll(struct file *file, poll_table *wait)
{ … }

static const struct file_operations userio_fops = …;

static struct miscdevice userio_misc = …;
module_driver(…);

MODULE_ALIAS_MISCDEV(…);
MODULE_ALIAS(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;