1/*
2 * PlayStation 2 Trance Vibrator driver
3 *
4 * Copyright (C) 2006 Sam Hocevar <sam@zoy.org>
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License as published by
8 *  the Free Software Foundation; either version 2 of the License, or
9 *  (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21/* Standard include files */
22#include <linux/kernel.h>
23#include <linux/errno.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/module.h>
27#include <linux/usb.h>
28
29/* Version Information */
30#define DRIVER_VERSION "v1.1"
31#define DRIVER_AUTHOR "Sam Hocevar, sam@zoy.org"
32#define DRIVER_DESC "PlayStation 2 Trance Vibrator driver"
33
34#define TRANCEVIBRATOR_VENDOR_ID	0x0b49	/* ASCII Corporation */
35#define TRANCEVIBRATOR_PRODUCT_ID	0x064f	/* Trance Vibrator */
36
37static const struct usb_device_id id_table[] = {
38	{ USB_DEVICE(TRANCEVIBRATOR_VENDOR_ID, TRANCEVIBRATOR_PRODUCT_ID) },
39	{ },
40};
41MODULE_DEVICE_TABLE (usb, id_table);
42
43/* Driver-local specific stuff */
44struct trancevibrator {
45	struct usb_device *udev;
46	unsigned int speed;
47};
48
49static ssize_t show_speed(struct device *dev, struct device_attribute *attr,
50			  char *buf)
51{
52	struct usb_interface *intf = to_usb_interface(dev);
53	struct trancevibrator *tv = usb_get_intfdata(intf);
54
55	return sprintf(buf, "%d\n", tv->speed);
56}
57
58static ssize_t set_speed(struct device *dev, struct device_attribute *attr,
59			 const char *buf, size_t count)
60{
61	struct usb_interface *intf = to_usb_interface(dev);
62	struct trancevibrator *tv = usb_get_intfdata(intf);
63	int temp, retval, old;
64
65	temp = simple_strtoul(buf, NULL, 10);
66	if (temp > 255)
67		temp = 255;
68	else if (temp < 0)
69		temp = 0;
70	old = tv->speed;
71	tv->speed = temp;
72
73	dev_dbg(&tv->udev->dev, "speed = %d\n", tv->speed);
74
75	/* Set speed */
76	retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0),
77				 0x01, /* vendor request: set speed */
78				 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
79				 tv->speed, /* speed value */
80				 0, NULL, 0, USB_CTRL_GET_TIMEOUT);
81	if (retval) {
82		tv->speed = old;
83		dev_dbg(&tv->udev->dev, "retval = %d\n", retval);
84		return retval;
85	}
86	return count;
87}
88
89static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR, show_speed, set_speed);
90
91static int tv_probe(struct usb_interface *interface,
92		    const struct usb_device_id *id)
93{
94	struct usb_device *udev = interface_to_usbdev(interface);
95	struct trancevibrator *dev;
96	int retval;
97
98	dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
99	if (dev == NULL) {
100		dev_err(&interface->dev, "Out of memory\n");
101		retval = -ENOMEM;
102		goto error;
103	}
104
105	dev->udev = usb_get_dev(udev);
106	usb_set_intfdata(interface, dev);
107	retval = device_create_file(&interface->dev, &dev_attr_speed);
108	if (retval)
109		goto error_create_file;
110
111	return 0;
112
113error_create_file:
114	usb_put_dev(udev);
115	usb_set_intfdata(interface, NULL);
116error:
117	kfree(dev);
118	return retval;
119}
120
121static void tv_disconnect(struct usb_interface *interface)
122{
123	struct trancevibrator *dev;
124
125	dev = usb_get_intfdata (interface);
126	device_remove_file(&interface->dev, &dev_attr_speed);
127	usb_set_intfdata(interface, NULL);
128	usb_put_dev(dev->udev);
129	kfree(dev);
130}
131
132/* USB subsystem object */
133static struct usb_driver tv_driver = {
134	.name =		"trancevibrator",
135	.probe =	tv_probe,
136	.disconnect =	tv_disconnect,
137	.id_table =	id_table,
138};
139
140module_usb_driver(tv_driver);
141
142MODULE_AUTHOR(DRIVER_AUTHOR);
143MODULE_DESCRIPTION(DRIVER_DESC);
144MODULE_LICENSE("GPL");
145