]> git.openfabrics.org - ~shefty/rdma-dev.git/blob - drivers/usb/misc/usbled.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[~shefty/rdma-dev.git] / drivers / usb / misc / usbled.c
1 /*
2  * USB LED driver
3  *
4  * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
5  *
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.
9  *
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
17 #include <linux/usb.h>
18
19
20 #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
21 #define DRIVER_DESC "USB LED Driver"
22
23 enum led_type {
24         DELCOM_VISUAL_SIGNAL_INDICATOR,
25         DREAM_CHEEKY_WEBMAIL_NOTIFIER,
26 };
27
28 /* table of devices that work with this driver */
29 static const struct usb_device_id id_table[] = {
30         { USB_DEVICE(0x0fc5, 0x1223),
31                         .driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR },
32         { USB_DEVICE(0x1d34, 0x0004),
33                         .driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
34         { USB_DEVICE(0x1d34, 0x000a),
35                         .driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
36         { },
37 };
38 MODULE_DEVICE_TABLE(usb, id_table);
39
40 struct usb_led {
41         struct usb_device       *udev;
42         unsigned char           blue;
43         unsigned char           red;
44         unsigned char           green;
45         enum led_type           type;
46 };
47
48 static void change_color(struct usb_led *led)
49 {
50         int retval = 0;
51         unsigned char *buffer;
52
53         buffer = kmalloc(8, GFP_KERNEL);
54         if (!buffer) {
55                 dev_err(&led->udev->dev, "out of memory\n");
56                 return;
57         }
58
59         switch (led->type) {
60         case DELCOM_VISUAL_SIGNAL_INDICATOR: {
61                 unsigned char color = 0x07;
62
63                 if (led->blue)
64                         color &= ~0x04;
65                 if (led->red)
66                         color &= ~0x02;
67                 if (led->green)
68                         color &= ~0x01;
69                 dev_dbg(&led->udev->dev,
70                         "blue = %d, red = %d, green = %d, color = %.2x\n",
71                         led->blue, led->red, led->green, color);
72
73                 retval = usb_control_msg(led->udev,
74                                         usb_sndctrlpipe(led->udev, 0),
75                                         0x12,
76                                         0xc8,
77                                         (0x02 * 0x100) + 0x0a,
78                                         (0x00 * 0x100) + color,
79                                         buffer,
80                                         8,
81                                         2000);
82                 break;
83         }
84
85         case DREAM_CHEEKY_WEBMAIL_NOTIFIER:
86                 dev_dbg(&led->udev->dev,
87                         "red = %d, green = %d, blue = %d\n",
88                         led->red, led->green, led->blue);
89
90                 buffer[0] = led->red;
91                 buffer[1] = led->green;
92                 buffer[2] = led->blue;
93                 buffer[3] = buffer[4] = buffer[5] = 0;
94                 buffer[6] = 0x1a;
95                 buffer[7] = 0x05;
96
97                 retval = usb_control_msg(led->udev,
98                                         usb_sndctrlpipe(led->udev, 0),
99                                         0x09,
100                                         0x21,
101                                         0x200,
102                                         0,
103                                         buffer,
104                                         8,
105                                         2000);
106                 break;
107
108         default:
109                 dev_err(&led->udev->dev, "unknown device type %d\n", led->type);
110         }
111
112         if (retval)
113                 dev_dbg(&led->udev->dev, "retval = %d\n", retval);
114         kfree(buffer);
115 }
116
117 #define show_set(value) \
118 static ssize_t show_##value(struct device *dev, struct device_attribute *attr,\
119                             char *buf)                                  \
120 {                                                                       \
121         struct usb_interface *intf = to_usb_interface(dev);             \
122         struct usb_led *led = usb_get_intfdata(intf);                   \
123                                                                         \
124         return sprintf(buf, "%d\n", led->value);                        \
125 }                                                                       \
126 static ssize_t set_##value(struct device *dev, struct device_attribute *attr,\
127                            const char *buf, size_t count)               \
128 {                                                                       \
129         struct usb_interface *intf = to_usb_interface(dev);             \
130         struct usb_led *led = usb_get_intfdata(intf);                   \
131         int temp = simple_strtoul(buf, NULL, 10);                       \
132                                                                         \
133         led->value = temp;                                              \
134         change_color(led);                                              \
135         return count;                                                   \
136 }                                                                       \
137 static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, show_##value, set_##value);
138 show_set(blue);
139 show_set(red);
140 show_set(green);
141
142 static int led_probe(struct usb_interface *interface,
143                      const struct usb_device_id *id)
144 {
145         struct usb_device *udev = interface_to_usbdev(interface);
146         struct usb_led *dev = NULL;
147         int retval = -ENOMEM;
148
149         dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
150         if (dev == NULL) {
151                 dev_err(&interface->dev, "out of memory\n");
152                 goto error_mem;
153         }
154
155         dev->udev = usb_get_dev(udev);
156         dev->type = id->driver_info;
157
158         usb_set_intfdata(interface, dev);
159
160         retval = device_create_file(&interface->dev, &dev_attr_blue);
161         if (retval)
162                 goto error;
163         retval = device_create_file(&interface->dev, &dev_attr_red);
164         if (retval)
165                 goto error;
166         retval = device_create_file(&interface->dev, &dev_attr_green);
167         if (retval)
168                 goto error;
169
170         if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) {
171                 unsigned char *enable;
172
173                 enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL);
174                 if (!enable) {
175                         dev_err(&interface->dev, "out of memory\n");
176                         retval = -ENOMEM;
177                         goto error;
178                 }
179
180                 retval = usb_control_msg(udev,
181                                         usb_sndctrlpipe(udev, 0),
182                                         0x09,
183                                         0x21,
184                                         0x200,
185                                         0,
186                                         enable,
187                                         8,
188                                         2000);
189
190                 kfree(enable);
191                 if (retval != 8)
192                         goto error;
193         }
194
195         dev_info(&interface->dev, "USB LED device now attached\n");
196         return 0;
197
198 error:
199         device_remove_file(&interface->dev, &dev_attr_blue);
200         device_remove_file(&interface->dev, &dev_attr_red);
201         device_remove_file(&interface->dev, &dev_attr_green);
202         usb_set_intfdata(interface, NULL);
203         usb_put_dev(dev->udev);
204         kfree(dev);
205 error_mem:
206         return retval;
207 }
208
209 static void led_disconnect(struct usb_interface *interface)
210 {
211         struct usb_led *dev;
212
213         dev = usb_get_intfdata(interface);
214
215         device_remove_file(&interface->dev, &dev_attr_blue);
216         device_remove_file(&interface->dev, &dev_attr_red);
217         device_remove_file(&interface->dev, &dev_attr_green);
218
219         /* first remove the files, then set the pointer to NULL */
220         usb_set_intfdata(interface, NULL);
221
222         usb_put_dev(dev->udev);
223
224         kfree(dev);
225
226         dev_info(&interface->dev, "USB LED now disconnected\n");
227 }
228
229 static struct usb_driver led_driver = {
230         .name =         "usbled",
231         .probe =        led_probe,
232         .disconnect =   led_disconnect,
233         .id_table =     id_table,
234 };
235
236 module_usb_driver(led_driver);
237
238 MODULE_AUTHOR(DRIVER_AUTHOR);
239 MODULE_DESCRIPTION(DRIVER_DESC);
240 MODULE_LICENSE("GPL");