4 * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
12 #include <linux/config.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/usb.h>
21 #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
22 #define DRIVER_DESC "USB LED Driver"
24 #define VENDOR_ID 0x0fc5
25 #define PRODUCT_ID 0x1223
27 /* table of devices that work with this driver */
28 static struct usb_device_id id_table [] = {
29 { USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
32 MODULE_DEVICE_TABLE (usb, id_table);
35 struct usb_device * udev;
44 static void change_color(struct usb_led *led)
47 unsigned char color = 0x07;
48 unsigned char *buffer;
50 buffer = kmalloc(8, GFP_KERNEL);
52 dev_err(&led->udev->dev, "out of memory\n");
62 dev_dbg(&led->udev->dev,
63 "blue = %d, red = %d, green = %d, color = %.2x\n",
64 led->blue, led->red, led->green, color);
66 retval = usb_control_msg(led->udev,
67 usb_sndctrlpipe(led->udev, 0),
70 (0x02 * 0x100) + 0x0a,
71 (0x00 * 0x100) + color,
76 dev_dbg(&led->udev->dev, "retval = %d\n", retval);
80 #define show_set(value) \
81 static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
83 struct usb_interface *intf = to_usb_interface(dev); \
84 struct usb_led *led = usb_get_intfdata(intf); \
86 return sprintf(buf, "%d\n", led->value); \
88 static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
90 struct usb_interface *intf = to_usb_interface(dev); \
91 struct usb_led *led = usb_get_intfdata(intf); \
92 int temp = simple_strtoul(buf, NULL, 10); \
98 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
103 static int led_probe(struct usb_interface *interface, const struct usb_device_id *id)
105 struct usb_device *udev = interface_to_usbdev(interface);
106 struct usb_led *dev = NULL;
107 int retval = -ENOMEM;
109 dev = kmalloc(sizeof(struct usb_led), GFP_KERNEL);
111 dev_err(&interface->dev, "Out of memory\n");
114 memset (dev, 0x00, sizeof (*dev));
116 dev->udev = usb_get_dev(udev);
118 usb_set_intfdata (interface, dev);
120 device_create_file(&interface->dev, &dev_attr_blue);
121 device_create_file(&interface->dev, &dev_attr_red);
122 device_create_file(&interface->dev, &dev_attr_green);
124 dev_info(&interface->dev, "USB LED device now attached\n");
132 static void led_disconnect(struct usb_interface *interface)
136 dev = usb_get_intfdata (interface);
137 usb_set_intfdata (interface, NULL);
139 device_remove_file(&interface->dev, &dev_attr_blue);
140 device_remove_file(&interface->dev, &dev_attr_red);
141 device_remove_file(&interface->dev, &dev_attr_green);
143 usb_put_dev(dev->udev);
147 dev_info(&interface->dev, "USB LED now disconnected\n");
150 static struct usb_driver led_driver = {
153 .disconnect = led_disconnect,
154 .id_table = id_table,
157 static int __init usb_led_init(void)
161 retval = usb_register(&led_driver);
163 err("usb_register failed. Error number %d", retval);
167 static void __exit usb_led_exit(void)
169 usb_deregister(&led_driver);
172 module_init (usb_led_init);
173 module_exit (usb_led_exit);
175 MODULE_AUTHOR(DRIVER_AUTHOR);
176 MODULE_DESCRIPTION(DRIVER_DESC);
177 MODULE_LICENSE("GPL");