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/slab.h>
25 #include <linux/module.h>
26 #include <linux/usb.h>
27 
28 /* Version Information */
29 #define DRIVER_VERSION "v1.1"
30 #define DRIVER_AUTHOR "Sam Hocevar, sam@zoy.org"
31 #define DRIVER_DESC "PlayStation 2 Trance Vibrator driver"
32 
33 #define TRANCEVIBRATOR_VENDOR_ID	0x0b49	/* ASCII Corporation */
34 #define TRANCEVIBRATOR_PRODUCT_ID	0x064f	/* Trance Vibrator */
35 
36 static const struct usb_device_id id_table[] = {
37 	{ USB_DEVICE(TRANCEVIBRATOR_VENDOR_ID, TRANCEVIBRATOR_PRODUCT_ID) },
38 	{ },
39 };
40 MODULE_DEVICE_TABLE (usb, id_table);
41 
42 /* Driver-local specific stuff */
43 struct trancevibrator {
44 	struct usb_device *udev;
45 	unsigned int speed;
46 };
47 
48 static ssize_t show_speed(struct device *dev, struct device_attribute *attr,
49 			  char *buf)
50 {
51 	struct usb_interface *intf = to_usb_interface(dev);
52 	struct trancevibrator *tv = usb_get_intfdata(intf);
53 
54 	return sprintf(buf, "%d\n", tv->speed);
55 }
56 
57 static ssize_t set_speed(struct device *dev, struct device_attribute *attr,
58 			 const char *buf, size_t count)
59 {
60 	struct usb_interface *intf = to_usb_interface(dev);
61 	struct trancevibrator *tv = usb_get_intfdata(intf);
62 	int temp, retval, old;
63 
64 	temp = simple_strtoul(buf, NULL, 10);
65 	if (temp > 255)
66 		temp = 255;
67 	else if (temp < 0)
68 		temp = 0;
69 	old = tv->speed;
70 	tv->speed = temp;
71 
72 	dev_dbg(&tv->udev->dev, "speed = %d\n", tv->speed);
73 
74 	/* Set speed */
75 	retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0),
76 				 0x01, /* vendor request: set speed */
77 				 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
78 				 tv->speed, /* speed value */
79 				 0, NULL, 0, USB_CTRL_GET_TIMEOUT);
80 	if (retval) {
81 		tv->speed = old;
82 		dev_dbg(&tv->udev->dev, "retval = %d\n", retval);
83 		return retval;
84 	}
85 	return count;
86 }
87 
88 static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR, show_speed, set_speed);
89 
90 static int tv_probe(struct usb_interface *interface,
91 		    const struct usb_device_id *id)
92 {
93 	struct usb_device *udev = interface_to_usbdev(interface);
94 	struct trancevibrator *dev;
95 	int retval;
96 
97 	dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
98 	if (dev == NULL) {
99 		dev_err(&interface->dev, "Out of memory\n");
100 		retval = -ENOMEM;
101 		goto error;
102 	}
103 
104 	dev->udev = usb_get_dev(udev);
105 	usb_set_intfdata(interface, dev);
106 	retval = device_create_file(&interface->dev, &dev_attr_speed);
107 	if (retval)
108 		goto error_create_file;
109 
110 	return 0;
111 
112 error_create_file:
113 	usb_put_dev(udev);
114 	usb_set_intfdata(interface, NULL);
115 error:
116 	kfree(dev);
117 	return retval;
118 }
119 
120 static void tv_disconnect(struct usb_interface *interface)
121 {
122 	struct trancevibrator *dev;
123 
124 	dev = usb_get_intfdata (interface);
125 	device_remove_file(&interface->dev, &dev_attr_speed);
126 	usb_set_intfdata(interface, NULL);
127 	usb_put_dev(dev->udev);
128 	kfree(dev);
129 }
130 
131 /* USB subsystem object */
132 static struct usb_driver tv_driver = {
133 	.name =		"trancevibrator",
134 	.probe =	tv_probe,
135 	.disconnect =	tv_disconnect,
136 	.id_table =	id_table,
137 };
138 
139 module_usb_driver(tv_driver);
140 
141 MODULE_AUTHOR(DRIVER_AUTHOR);
142 MODULE_DESCRIPTION(DRIVER_DESC);
143 MODULE_LICENSE("GPL");
144