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