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