1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * PlayStation 2 Trance Vibrator driver
4 *
5 * Copyright (C) 2006 Sam Hocevar <sam@zoy.org>
6 */
7
8 /* Standard include files */
9 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <linux/usb.h>
14
15 #define DRIVER_AUTHOR "Sam Hocevar, sam@zoy.org"
16 #define DRIVER_DESC "PlayStation 2 Trance Vibrator driver"
17
18 #define TRANCEVIBRATOR_VENDOR_ID 0x0b49 /* ASCII Corporation */
19 #define TRANCEVIBRATOR_PRODUCT_ID 0x064f /* Trance Vibrator */
20
21 static const struct usb_device_id id_table[] = {
22 { USB_DEVICE(TRANCEVIBRATOR_VENDOR_ID, TRANCEVIBRATOR_PRODUCT_ID) },
23 { },
24 };
25 MODULE_DEVICE_TABLE (usb, id_table);
26
27 /* Driver-local specific stuff */
28 struct trancevibrator {
29 struct usb_device *udev;
30 unsigned int speed;
31 };
32
speed_show(struct device * dev,struct device_attribute * attr,char * buf)33 static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
34 char *buf)
35 {
36 struct usb_interface *intf = to_usb_interface(dev);
37 struct trancevibrator *tv = usb_get_intfdata(intf);
38
39 return sprintf(buf, "%d\n", tv->speed);
40 }
41
speed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)42 static ssize_t speed_store(struct device *dev, struct device_attribute *attr,
43 const char *buf, size_t count)
44 {
45 struct usb_interface *intf = to_usb_interface(dev);
46 struct trancevibrator *tv = usb_get_intfdata(intf);
47 int temp, retval, old;
48
49 retval = kstrtoint(buf, 10, &temp);
50 if (retval)
51 return retval;
52 if (temp > 255)
53 temp = 255;
54 else if (temp < 0)
55 temp = 0;
56 old = tv->speed;
57 tv->speed = temp;
58
59 dev_dbg(&tv->udev->dev, "speed = %d\n", tv->speed);
60
61 /* Set speed */
62 retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0),
63 0x01, /* vendor request: set speed */
64 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
65 tv->speed, /* speed value */
66 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
67 if (retval) {
68 tv->speed = old;
69 dev_dbg(&tv->udev->dev, "retval = %d\n", retval);
70 return retval;
71 }
72 return count;
73 }
74 static DEVICE_ATTR_RW(speed);
75
76 static struct attribute *tv_attrs[] = {
77 &dev_attr_speed.attr,
78 NULL,
79 };
80 ATTRIBUTE_GROUPS(tv);
81
tv_probe(struct usb_interface * interface,const struct usb_device_id * id)82 static int tv_probe(struct usb_interface *interface,
83 const struct usb_device_id *id)
84 {
85 struct usb_device *udev = interface_to_usbdev(interface);
86 struct trancevibrator *dev;
87 int retval;
88
89 dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
90 if (!dev) {
91 retval = -ENOMEM;
92 goto error;
93 }
94
95 dev->udev = usb_get_dev(udev);
96 usb_set_intfdata(interface, dev);
97
98 return 0;
99
100 error:
101 kfree(dev);
102 return retval;
103 }
104
tv_disconnect(struct usb_interface * interface)105 static void tv_disconnect(struct usb_interface *interface)
106 {
107 struct trancevibrator *dev;
108
109 dev = usb_get_intfdata (interface);
110 usb_set_intfdata(interface, NULL);
111 usb_put_dev(dev->udev);
112 kfree(dev);
113 }
114
115 /* USB subsystem object */
116 static struct usb_driver tv_driver = {
117 .name = "trancevibrator",
118 .probe = tv_probe,
119 .disconnect = tv_disconnect,
120 .id_table = id_table,
121 .dev_groups = tv_groups,
122 };
123
124 module_usb_driver(tv_driver);
125
126 MODULE_AUTHOR(DRIVER_AUTHOR);
127 MODULE_DESCRIPTION(DRIVER_DESC);
128 MODULE_LICENSE("GPL");
129
