linux-imx

/*

 * Roccat Lua driver for Linux

 *

 * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>

 */

​

/*

 * 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.

 */

​

/*

 * Roccat Lua is a gamer mouse which cpi, button and light settings can be

 * configured.

 */

​

#include <linux/device.h>

#include <linux/input.h>

#include <linux/hid.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/hid-roccat.h>

#include "hid-ids.h"

#include "hid-roccat-common.h"

#include "hid-roccat-lua.h"

​

static ssize_t lua_sysfs_read(struct file *fp, struct kobject *kobj,

        char *buf, loff_t off, size_t count,

        size_t real_size, uint command)

{

    struct device *dev = kobj_to_dev(kobj);

    struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));

    struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));

    int retval;

​

    if (off >= real_size)

        return 0;

​

    if (off != 0 || count != real_size)

        return -EINVAL;

​

    mutex_lock(&lua->lua_lock);

    retval = roccat_common2_receive(usb_dev, command, buf, real_size);

    mutex_unlock(&lua->lua_lock);

​

    return retval ? retval : real_size;

}

​

static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj,

        void const *buf, loff_t off, size_t count,

        size_t real_size, uint command)

{

    struct device *dev = kobj_to_dev(kobj);

    struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));

    struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));

    int retval;

​

    if (off != 0 || count != real_size)

        return -EINVAL;

​

    mutex_lock(&lua->lua_lock);