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Commit | Line | Data |
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1da177e4 | 1 | /* |
73bc7d31 | 2 | * USB LED driver |
1da177e4 LT |
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 | ||
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/errno.h> | |
1da177e4 LT |
14 | #include <linux/slab.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/usb.h> | |
17 | ||
18 | ||
19 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com" | |
20 | #define DRIVER_DESC "USB LED Driver" | |
21 | ||
73bc7d31 MF |
22 | enum led_type { |
23 | DELCOM_VISUAL_SIGNAL_INDICATOR, | |
24 | DREAM_CHEEKY_WEBMAIL_NOTIFIER, | |
e8fcbb61 | 25 | RISO_KAGAKU_LED |
73bc7d31 | 26 | }; |
1da177e4 | 27 | |
e8fcbb61 CV |
28 | /* the Webmail LED made by RISO KAGAKU CORP. decodes a color index |
29 | internally, we want to keep the red+green+blue sysfs api, so we decode | |
30 | from 1-bit RGB to the riso kagaku color index according to this table... */ | |
31 | ||
32 | static unsigned const char riso_kagaku_tbl[] = { | |
33 | /* R+2G+4B -> riso kagaku color index */ | |
34 | [0] = 0, /* black */ | |
35 | [1] = 2, /* red */ | |
36 | [2] = 1, /* green */ | |
37 | [3] = 5, /* yellow */ | |
38 | [4] = 3, /* blue */ | |
39 | [5] = 6, /* magenta */ | |
40 | [6] = 4, /* cyan */ | |
41 | [7] = 7 /* white */ | |
42 | }; | |
43 | ||
44 | #define RISO_KAGAKU_IX(r,g,b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)] | |
45 | ||
1da177e4 | 46 | /* table of devices that work with this driver */ |
33b9e162 | 47 | static const struct usb_device_id id_table[] = { |
73bc7d31 MF |
48 | { USB_DEVICE(0x0fc5, 0x1223), |
49 | .driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR }, | |
50 | { USB_DEVICE(0x1d34, 0x0004), | |
51 | .driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER }, | |
789aaa2e DD |
52 | { USB_DEVICE(0x1d34, 0x000a), |
53 | .driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER }, | |
e8fcbb61 CV |
54 | { USB_DEVICE(0x1294, 0x1320), |
55 | .driver_info = RISO_KAGAKU_LED }, | |
1da177e4 LT |
56 | { }, |
57 | }; | |
ea835863 | 58 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 LT |
59 | |
60 | struct usb_led { | |
ea835863 | 61 | struct usb_device *udev; |
1da177e4 LT |
62 | unsigned char blue; |
63 | unsigned char red; | |
64 | unsigned char green; | |
73bc7d31 | 65 | enum led_type type; |
1da177e4 LT |
66 | }; |
67 | ||
1da177e4 LT |
68 | static void change_color(struct usb_led *led) |
69 | { | |
952eca0a | 70 | int retval = 0; |
1da177e4 | 71 | unsigned char *buffer; |
e8fcbb61 | 72 | int actlength; |
1da177e4 LT |
73 | |
74 | buffer = kmalloc(8, GFP_KERNEL); | |
75 | if (!buffer) { | |
76 | dev_err(&led->udev->dev, "out of memory\n"); | |
77 | return; | |
78 | } | |
79 | ||
73bc7d31 MF |
80 | switch (led->type) { |
81 | case DELCOM_VISUAL_SIGNAL_INDICATOR: { | |
82 | unsigned char color = 0x07; | |
83 | ||
84 | if (led->blue) | |
85 | color &= ~0x04; | |
86 | if (led->red) | |
87 | color &= ~0x02; | |
88 | if (led->green) | |
89 | color &= ~0x01; | |
90 | dev_dbg(&led->udev->dev, | |
91 | "blue = %d, red = %d, green = %d, color = %.2x\n", | |
92 | led->blue, led->red, led->green, color); | |
93 | ||
94 | retval = usb_control_msg(led->udev, | |
95 | usb_sndctrlpipe(led->udev, 0), | |
96 | 0x12, | |
97 | 0xc8, | |
98 | (0x02 * 0x100) + 0x0a, | |
99 | (0x00 * 0x100) + color, | |
100 | buffer, | |
101 | 8, | |
102 | 2000); | |
103 | break; | |
104 | } | |
105 | ||
106 | case DREAM_CHEEKY_WEBMAIL_NOTIFIER: | |
107 | dev_dbg(&led->udev->dev, | |
108 | "red = %d, green = %d, blue = %d\n", | |
109 | led->red, led->green, led->blue); | |
110 | ||
111 | buffer[0] = led->red; | |
112 | buffer[1] = led->green; | |
113 | buffer[2] = led->blue; | |
114 | buffer[3] = buffer[4] = buffer[5] = 0; | |
115 | buffer[6] = 0x1a; | |
116 | buffer[7] = 0x05; | |
117 | ||
118 | retval = usb_control_msg(led->udev, | |
119 | usb_sndctrlpipe(led->udev, 0), | |
120 | 0x09, | |
121 | 0x21, | |
122 | 0x200, | |
123 | 0, | |
124 | buffer, | |
125 | 8, | |
126 | 2000); | |
127 | break; | |
128 | ||
e8fcbb61 CV |
129 | case RISO_KAGAKU_LED: |
130 | buffer[0] = RISO_KAGAKU_IX(led->red, led->green, led->blue); | |
131 | buffer[1] = 0; | |
132 | buffer[2] = 0; | |
133 | buffer[3] = 0; | |
134 | buffer[4] = 0; | |
135 | ||
136 | retval = usb_interrupt_msg(led->udev, | |
137 | usb_sndctrlpipe(led->udev, 2), | |
138 | buffer, 5, &actlength, 1000 /*ms timeout*/); | |
139 | break; | |
140 | ||
73bc7d31 MF |
141 | default: |
142 | dev_err(&led->udev->dev, "unknown device type %d\n", led->type); | |
143 | } | |
144 | ||
1da177e4 LT |
145 | if (retval) |
146 | dev_dbg(&led->udev->dev, "retval = %d\n", retval); | |
147 | kfree(buffer); | |
148 | } | |
149 | ||
150 | #define show_set(value) \ | |
ea835863 ZP |
151 | static ssize_t show_##value(struct device *dev, struct device_attribute *attr,\ |
152 | char *buf) \ | |
1da177e4 LT |
153 | { \ |
154 | struct usb_interface *intf = to_usb_interface(dev); \ | |
155 | struct usb_led *led = usb_get_intfdata(intf); \ | |
156 | \ | |
157 | return sprintf(buf, "%d\n", led->value); \ | |
158 | } \ | |
ea835863 ZP |
159 | static ssize_t set_##value(struct device *dev, struct device_attribute *attr,\ |
160 | const char *buf, size_t count) \ | |
1da177e4 LT |
161 | { \ |
162 | struct usb_interface *intf = to_usb_interface(dev); \ | |
163 | struct usb_led *led = usb_get_intfdata(intf); \ | |
164 | int temp = simple_strtoul(buf, NULL, 10); \ | |
165 | \ | |
166 | led->value = temp; \ | |
167 | change_color(led); \ | |
168 | return count; \ | |
169 | } \ | |
48f11547 | 170 | static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, show_##value, set_##value); |
1da177e4 LT |
171 | show_set(blue); |
172 | show_set(red); | |
173 | show_set(green); | |
174 | ||
ea835863 ZP |
175 | static int led_probe(struct usb_interface *interface, |
176 | const struct usb_device_id *id) | |
1da177e4 LT |
177 | { |
178 | struct usb_device *udev = interface_to_usbdev(interface); | |
179 | struct usb_led *dev = NULL; | |
180 | int retval = -ENOMEM; | |
181 | ||
06d69474 | 182 | dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL); |
1da177e4 | 183 | if (dev == NULL) { |
73bc7d31 | 184 | dev_err(&interface->dev, "out of memory\n"); |
4d42e1bb | 185 | goto error_mem; |
1da177e4 | 186 | } |
1da177e4 LT |
187 | |
188 | dev->udev = usb_get_dev(udev); | |
73bc7d31 | 189 | dev->type = id->driver_info; |
1da177e4 | 190 | |
ea835863 | 191 | usb_set_intfdata(interface, dev); |
1da177e4 | 192 | |
4d42e1bb GKH |
193 | retval = device_create_file(&interface->dev, &dev_attr_blue); |
194 | if (retval) | |
195 | goto error; | |
196 | retval = device_create_file(&interface->dev, &dev_attr_red); | |
197 | if (retval) | |
198 | goto error; | |
199 | retval = device_create_file(&interface->dev, &dev_attr_green); | |
200 | if (retval) | |
201 | goto error; | |
1da177e4 | 202 | |
73bc7d31 MF |
203 | if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) { |
204 | unsigned char *enable; | |
205 | ||
206 | enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL); | |
207 | if (!enable) { | |
208 | dev_err(&interface->dev, "out of memory\n"); | |
209 | retval = -ENOMEM; | |
210 | goto error; | |
211 | } | |
212 | ||
213 | retval = usb_control_msg(udev, | |
214 | usb_sndctrlpipe(udev, 0), | |
215 | 0x09, | |
216 | 0x21, | |
217 | 0x200, | |
218 | 0, | |
219 | enable, | |
220 | 8, | |
221 | 2000); | |
222 | ||
223 | kfree(enable); | |
224 | if (retval != 8) | |
225 | goto error; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | dev_info(&interface->dev, "USB LED device now attached\n"); |
229 | return 0; | |
230 | ||
231 | error: | |
4d42e1bb GKH |
232 | device_remove_file(&interface->dev, &dev_attr_blue); |
233 | device_remove_file(&interface->dev, &dev_attr_red); | |
234 | device_remove_file(&interface->dev, &dev_attr_green); | |
ea835863 | 235 | usb_set_intfdata(interface, NULL); |
4d42e1bb | 236 | usb_put_dev(dev->udev); |
1da177e4 | 237 | kfree(dev); |
4d42e1bb | 238 | error_mem: |
1da177e4 LT |
239 | return retval; |
240 | } | |
241 | ||
242 | static void led_disconnect(struct usb_interface *interface) | |
243 | { | |
244 | struct usb_led *dev; | |
245 | ||
ea835863 | 246 | dev = usb_get_intfdata(interface); |
1da177e4 LT |
247 | |
248 | device_remove_file(&interface->dev, &dev_attr_blue); | |
249 | device_remove_file(&interface->dev, &dev_attr_red); | |
250 | device_remove_file(&interface->dev, &dev_attr_green); | |
251 | ||
ed206ec9 | 252 | /* first remove the files, then set the pointer to NULL */ |
ea835863 | 253 | usb_set_intfdata(interface, NULL); |
ed206ec9 | 254 | |
1da177e4 LT |
255 | usb_put_dev(dev->udev); |
256 | ||
257 | kfree(dev); | |
258 | ||
259 | dev_info(&interface->dev, "USB LED now disconnected\n"); | |
260 | } | |
261 | ||
262 | static struct usb_driver led_driver = { | |
1da177e4 LT |
263 | .name = "usbled", |
264 | .probe = led_probe, | |
265 | .disconnect = led_disconnect, | |
266 | .id_table = id_table, | |
267 | }; | |
268 | ||
65db4305 | 269 | module_usb_driver(led_driver); |
1da177e4 LT |
270 | |
271 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
272 | MODULE_DESCRIPTION(DRIVER_DESC); | |
273 | MODULE_LICENSE("GPL"); |