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1/*
2 * USB 7 Segment Driver
3 *
4 * Copyright (C) 2008 Harrison Metzger <harrisonmetz@gmail.com>
5 * Based on usbled.c by Greg Kroah-Hartman (greg@kroah.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, version 2.
10 *
11 */
12
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/string.h>
19#include <linux/usb.h>
20
21
22#define DRIVER_AUTHOR "Harrison Metzger <harrisonmetz@gmail.com>"
23#define DRIVER_DESC "USB 7 Segment Driver"
24
25#define VENDOR_ID 0x0fc5
26#define PRODUCT_ID 0x1227
27#define MAXLEN 6
28
29/* table of devices that work with this driver */
30static const struct usb_device_id id_table[] = {
31 { USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
32 { },
33};
34MODULE_DEVICE_TABLE(usb, id_table);
35
36/* the different text display modes the device is capable of */
37static char *display_textmodes[] = {"raw", "hex", "ascii", NULL};
38
39struct usb_sevsegdev {
40 struct usb_device *udev;
41 struct usb_interface *intf;
42
43 u8 powered;
44 u8 mode_msb;
45 u8 mode_lsb;
46 u8 decimals[MAXLEN];
47 u8 textmode;
48 u8 text[MAXLEN];
49 u16 textlength;
50
51 u8 shadow_power; /* for PM */
52 u8 has_interface_pm;
53};
54
55/* sysfs_streq can't replace this completely
56 * If the device was in hex mode, and the user wanted a 0,
57 * if str commands are used, we would assume the end of string
58 * so mem commands are used.
59 */
60inline size_t my_memlen(const char *buf, size_t count)
61{
62 if (count > 0 && buf[count-1] == '\n')
63 return count - 1;
64 else
65 return count;
66}
67
68static void update_display_powered(struct usb_sevsegdev *mydev)
69{
70 int rc;
71
72 if (mydev->powered && !mydev->has_interface_pm) {
73 rc = usb_autopm_get_interface(mydev->intf);
74 if (rc < 0)
75 return;
76 mydev->has_interface_pm = 1;
77 }
78
79 if (mydev->shadow_power != 1)
80 return;
81
82 rc = usb_control_msg(mydev->udev,
83 usb_sndctrlpipe(mydev->udev, 0),
84 0x12,
85 0x48,
86 (80 * 0x100) + 10, /* (power mode) */
87 (0x00 * 0x100) + (mydev->powered ? 1 : 0),
88 NULL,
89 0,
90 2000);
91 if (rc < 0)
92 dev_dbg(&mydev->udev->dev, "power retval = %d\n", rc);
93
94 if (!mydev->powered && mydev->has_interface_pm) {
95 usb_autopm_put_interface(mydev->intf);
96 mydev->has_interface_pm = 0;
97 }
98}
99
100static void update_display_mode(struct usb_sevsegdev *mydev)
101{
102 int rc;
103
104 if(mydev->shadow_power != 1)
105 return;
106
107 rc = usb_control_msg(mydev->udev,
108 usb_sndctrlpipe(mydev->udev, 0),
109 0x12,
110 0x48,
111 (82 * 0x100) + 10, /* (set mode) */
112 (mydev->mode_msb * 0x100) + mydev->mode_lsb,
113 NULL,
114 0,
115 2000);
116
117 if (rc < 0)
118 dev_dbg(&mydev->udev->dev, "mode retval = %d\n", rc);
119}
120
121static void update_display_visual(struct usb_sevsegdev *mydev, gfp_t mf)
122{
123 int rc;
124 int i;
125 unsigned char *buffer;
126 u8 decimals = 0;
127
128 if(mydev->shadow_power != 1)
129 return;
130
131 buffer = kzalloc(MAXLEN, mf);
132 if (!buffer) {
133 dev_err(&mydev->udev->dev, "out of memory\n");
134 return;
135 }
136
137 /* The device is right to left, where as you write left to right */
138 for (i = 0; i < mydev->textlength; i++)
139 buffer[i] = mydev->text[mydev->textlength-1-i];
140
141 rc = usb_control_msg(mydev->udev,
142 usb_sndctrlpipe(mydev->udev, 0),
143 0x12,
144 0x48,
145 (85 * 0x100) + 10, /* (write text) */
146 (0 * 0x100) + mydev->textmode, /* mode */
147 buffer,
148 mydev->textlength,
149 2000);
150
151 if (rc < 0)
152 dev_dbg(&mydev->udev->dev, "write retval = %d\n", rc);
153
154 kfree(buffer);
155
156 /* The device is right to left, where as you write left to right */
157 for (i = 0; i < sizeof(mydev->decimals); i++)
158 decimals |= mydev->decimals[i] << i;
159
160 rc = usb_control_msg(mydev->udev,
161 usb_sndctrlpipe(mydev->udev, 0),
162 0x12,
163 0x48,
164 (86 * 0x100) + 10, /* (set decimal) */
165 (0 * 0x100) + decimals, /* decimals */
166 NULL,
167 0,
168 2000);
169
170 if (rc < 0)
171 dev_dbg(&mydev->udev->dev, "decimal retval = %d\n", rc);
172}
173
174#define MYDEV_ATTR_SIMPLE_UNSIGNED(name, update_fcn) \
175static ssize_t show_attr_##name(struct device *dev, \
176 struct device_attribute *attr, char *buf) \
177{ \
178 struct usb_interface *intf = to_usb_interface(dev); \
179 struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
180 \
181 return sprintf(buf, "%u\n", mydev->name); \
182} \
183 \
184static ssize_t set_attr_##name(struct device *dev, \
185 struct device_attribute *attr, const char *buf, size_t count) \
186{ \
187 struct usb_interface *intf = to_usb_interface(dev); \
188 struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
189 \
190 mydev->name = simple_strtoul(buf, NULL, 10); \
191 update_fcn(mydev); \
192 \
193 return count; \
194} \
195static DEVICE_ATTR(name, S_IRUGO | S_IWUSR, show_attr_##name, set_attr_##name);
196
197static ssize_t show_attr_text(struct device *dev,
198 struct device_attribute *attr, char *buf)
199{
200 struct usb_interface *intf = to_usb_interface(dev);
201 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
202
203 return snprintf(buf, mydev->textlength, "%s\n", mydev->text);
204}
205
206static ssize_t set_attr_text(struct device *dev,
207 struct device_attribute *attr, const char *buf, size_t count)
208{
209 struct usb_interface *intf = to_usb_interface(dev);
210 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
211 size_t end = my_memlen(buf, count);
212
213 if (end > sizeof(mydev->text))
214 return -EINVAL;
215
216 memset(mydev->text, 0, sizeof(mydev->text));
217 mydev->textlength = end;
218
219 if (end > 0)
220 memcpy(mydev->text, buf, end);
221
222 update_display_visual(mydev, GFP_KERNEL);
223 return count;
224}
225
226static DEVICE_ATTR(text, S_IRUGO | S_IWUSR, show_attr_text, set_attr_text);
227
228static ssize_t show_attr_decimals(struct device *dev,
229 struct device_attribute *attr, char *buf)
230{
231 struct usb_interface *intf = to_usb_interface(dev);
232 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
233 int i;
234 int pos;
235
236 for (i = 0; i < sizeof(mydev->decimals); i++) {
237 pos = sizeof(mydev->decimals) - 1 - i;
238 if (mydev->decimals[i] == 0)
239 buf[pos] = '0';
240 else if (mydev->decimals[i] == 1)
241 buf[pos] = '1';
242 else
243 buf[pos] = 'x';
244 }
245
246 buf[sizeof(mydev->decimals)] = '\n';
247 return sizeof(mydev->decimals) + 1;
248}
249
250static ssize_t set_attr_decimals(struct device *dev,
251 struct device_attribute *attr, const char *buf, size_t count)
252{
253 struct usb_interface *intf = to_usb_interface(dev);
254 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
255 size_t end = my_memlen(buf, count);
256 int i;
257
258 if (end > sizeof(mydev->decimals))
259 return -EINVAL;
260
261 for (i = 0; i < end; i++)
262 if (buf[i] != '0' && buf[i] != '1')
263 return -EINVAL;
264
265 memset(mydev->decimals, 0, sizeof(mydev->decimals));
266 for (i = 0; i < end; i++)
267 if (buf[i] == '1')
268 mydev->decimals[end-1-i] = 1;
269
270 update_display_visual(mydev, GFP_KERNEL);
271
272 return count;
273}
274
275static DEVICE_ATTR(decimals, S_IRUGO | S_IWUSR, show_attr_decimals, set_attr_decimals);
276
277static ssize_t show_attr_textmode(struct device *dev,
278 struct device_attribute *attr, char *buf)
279{
280 struct usb_interface *intf = to_usb_interface(dev);
281 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
282 int i;
283
284 buf[0] = 0;
285
286 for (i = 0; display_textmodes[i]; i++) {
287 if (mydev->textmode == i) {
288 strcat(buf, " [");
289 strcat(buf, display_textmodes[i]);
290 strcat(buf, "] ");
291 } else {
292 strcat(buf, " ");
293 strcat(buf, display_textmodes[i]);
294 strcat(buf, " ");
295 }
296 }
297 strcat(buf, "\n");
298
299
300 return strlen(buf);
301}
302
303static ssize_t set_attr_textmode(struct device *dev,
304 struct device_attribute *attr, const char *buf, size_t count)
305{
306 struct usb_interface *intf = to_usb_interface(dev);
307 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
308 int i;
309
310 for (i = 0; display_textmodes[i]; i++) {
311 if (sysfs_streq(display_textmodes[i], buf)) {
312 mydev->textmode = i;
313 update_display_visual(mydev, GFP_KERNEL);
314 return count;
315 }
316 }
317
318 return -EINVAL;
319}
320
321static DEVICE_ATTR(textmode, S_IRUGO | S_IWUSR, show_attr_textmode, set_attr_textmode);
322
323
324MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
325MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
326MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);
327
328static struct attribute *dev_attrs[] = {
329 &dev_attr_powered.attr,
330 &dev_attr_text.attr,
331 &dev_attr_textmode.attr,
332 &dev_attr_decimals.attr,
333 &dev_attr_mode_msb.attr,
334 &dev_attr_mode_lsb.attr,
335 NULL
336};
337
338static struct attribute_group dev_attr_grp = {
339 .attrs = dev_attrs,
340};
341
342static int sevseg_probe(struct usb_interface *interface,
343 const struct usb_device_id *id)
344{
345 struct usb_device *udev = interface_to_usbdev(interface);
346 struct usb_sevsegdev *mydev = NULL;
347 int rc = -ENOMEM;
348
349 mydev = kzalloc(sizeof(struct usb_sevsegdev), GFP_KERNEL);
350 if (mydev == NULL) {
351 dev_err(&interface->dev, "Out of memory\n");
352 goto error_mem;
353 }
354
355 mydev->udev = usb_get_dev(udev);
356 mydev->intf = interface;
357 usb_set_intfdata(interface, mydev);
358
359 /* PM */
360 mydev->shadow_power = 1; /* currently active */
361 mydev->has_interface_pm = 0; /* have not issued autopm_get */
362
363 /*set defaults */
364 mydev->textmode = 0x02; /* ascii mode */
365 mydev->mode_msb = 0x06; /* 6 characters */
366 mydev->mode_lsb = 0x3f; /* scanmode for 6 chars */
367
368 rc = sysfs_create_group(&interface->dev.kobj, &dev_attr_grp);
369 if (rc)
370 goto error;
371
372 dev_info(&interface->dev, "USB 7 Segment device now attached\n");
373 return 0;
374
375error:
376 usb_set_intfdata(interface, NULL);
377 usb_put_dev(mydev->udev);
378 kfree(mydev);
379error_mem:
380 return rc;
381}
382
383static void sevseg_disconnect(struct usb_interface *interface)
384{
385 struct usb_sevsegdev *mydev;
386
387 mydev = usb_get_intfdata(interface);
388 sysfs_remove_group(&interface->dev.kobj, &dev_attr_grp);
389 usb_set_intfdata(interface, NULL);
390 usb_put_dev(mydev->udev);
391 kfree(mydev);
392 dev_info(&interface->dev, "USB 7 Segment now disconnected\n");
393}
394
395static int sevseg_suspend(struct usb_interface *intf, pm_message_t message)
396{
397 struct usb_sevsegdev *mydev;
398
399 mydev = usb_get_intfdata(intf);
400 mydev->shadow_power = 0;
401
402 return 0;
403}
404
405static int sevseg_resume(struct usb_interface *intf)
406{
407 struct usb_sevsegdev *mydev;
408
409 mydev = usb_get_intfdata(intf);
410 mydev->shadow_power = 1;
411 update_display_mode(mydev);
412 update_display_visual(mydev, GFP_NOIO);
413
414 return 0;
415}
416
417static int sevseg_reset_resume(struct usb_interface *intf)
418{
419 struct usb_sevsegdev *mydev;
420
421 mydev = usb_get_intfdata(intf);
422 mydev->shadow_power = 1;
423 update_display_mode(mydev);
424 update_display_visual(mydev, GFP_NOIO);
425
426 return 0;
427}
428
429static struct usb_driver sevseg_driver = {
430 .name = "usbsevseg",
431 .probe = sevseg_probe,
432 .disconnect = sevseg_disconnect,
433 .suspend = sevseg_suspend,
434 .resume = sevseg_resume,
435 .reset_resume = sevseg_reset_resume,
436 .id_table = id_table,
437 .supports_autosuspend = 1,
438};
439
440static int __init usb_sevseg_init(void)
441{
442 int rc = 0;
443
444 rc = usb_register(&sevseg_driver);
445 if (rc)
446 err("usb_register failed. Error number %d", rc);
447 return rc;
448}
449
450static void __exit usb_sevseg_exit(void)
451{
452 usb_deregister(&sevseg_driver);
453}
454
455module_init(usb_sevseg_init);
456module_exit(usb_sevseg_exit);
457
458MODULE_AUTHOR(DRIVER_AUTHOR);
459MODULE_DESCRIPTION(DRIVER_DESC);
460MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * USB 7 Segment Driver
4 *
5 * Copyright (C) 2008 Harrison Metzger <harrisonmetz@gmail.com>
6 * Based on usbled.c by Greg Kroah-Hartman (greg@kroah.com)
7 */
8
9#include <linux/kernel.h>
10#include <linux/errno.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13#include <linux/string.h>
14#include <linux/usb.h>
15
16
17#define DRIVER_AUTHOR "Harrison Metzger <harrisonmetz@gmail.com>"
18#define DRIVER_DESC "USB 7 Segment Driver"
19
20#define VENDOR_ID 0x0fc5
21#define PRODUCT_ID 0x1227
22#define MAXLEN 8
23
24/* table of devices that work with this driver */
25static const struct usb_device_id id_table[] = {
26 { USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
27 { },
28};
29MODULE_DEVICE_TABLE(usb, id_table);
30
31/* the different text display modes the device is capable of */
32static const char *display_textmodes[] = {"raw", "hex", "ascii"};
33
34struct usb_sevsegdev {
35 struct usb_device *udev;
36 struct usb_interface *intf;
37
38 u8 powered;
39 u8 mode_msb;
40 u8 mode_lsb;
41 u8 decimals[MAXLEN];
42 u8 textmode;
43 u8 text[MAXLEN];
44 u16 textlength;
45
46 u8 shadow_power; /* for PM */
47 u8 has_interface_pm;
48};
49
50/* sysfs_streq can't replace this completely
51 * If the device was in hex mode, and the user wanted a 0,
52 * if str commands are used, we would assume the end of string
53 * so mem commands are used.
54 */
55static inline size_t my_memlen(const char *buf, size_t count)
56{
57 if (count > 0 && buf[count-1] == '\n')
58 return count - 1;
59 else
60 return count;
61}
62
63static void update_display_powered(struct usb_sevsegdev *mydev)
64{
65 int rc;
66
67 if (mydev->powered && !mydev->has_interface_pm) {
68 rc = usb_autopm_get_interface(mydev->intf);
69 if (rc < 0)
70 return;
71 mydev->has_interface_pm = 1;
72 }
73
74 if (mydev->shadow_power != 1)
75 return;
76
77 rc = usb_control_msg_send(mydev->udev, 0, 0x12, 0x48,
78 (80 * 0x100) + 10, /* (power mode) */
79 (0x00 * 0x100) + (mydev->powered ? 1 : 0),
80 NULL, 0, 2000, GFP_KERNEL);
81 if (rc < 0)
82 dev_dbg(&mydev->udev->dev, "power retval = %d\n", rc);
83
84 if (!mydev->powered && mydev->has_interface_pm) {
85 usb_autopm_put_interface(mydev->intf);
86 mydev->has_interface_pm = 0;
87 }
88}
89
90static void update_display_mode(struct usb_sevsegdev *mydev)
91{
92 int rc;
93
94 if(mydev->shadow_power != 1)
95 return;
96
97 rc = usb_control_msg_send(mydev->udev, 0, 0x12, 0x48,
98 (82 * 0x100) + 10, /* (set mode) */
99 (mydev->mode_msb * 0x100) + mydev->mode_lsb,
100 NULL, 0, 2000, GFP_NOIO);
101
102 if (rc < 0)
103 dev_dbg(&mydev->udev->dev, "mode retval = %d\n", rc);
104}
105
106static void update_display_visual(struct usb_sevsegdev *mydev, gfp_t mf)
107{
108 int rc;
109 int i;
110 unsigned char buffer[MAXLEN] = {0};
111 u8 decimals = 0;
112
113 if(mydev->shadow_power != 1)
114 return;
115
116 /* The device is right to left, where as you write left to right */
117 for (i = 0; i < mydev->textlength; i++)
118 buffer[i] = mydev->text[mydev->textlength-1-i];
119
120 rc = usb_control_msg_send(mydev->udev, 0, 0x12, 0x48,
121 (85 * 0x100) + 10, /* (write text) */
122 (0 * 0x100) + mydev->textmode, /* mode */
123 &buffer, mydev->textlength, 2000, mf);
124
125 if (rc < 0)
126 dev_dbg(&mydev->udev->dev, "write retval = %d\n", rc);
127
128 /* The device is right to left, where as you write left to right */
129 for (i = 0; i < sizeof(mydev->decimals); i++)
130 decimals |= mydev->decimals[i] << i;
131
132 rc = usb_control_msg_send(mydev->udev, 0, 0x12, 0x48,
133 (86 * 0x100) + 10, /* (set decimal) */
134 (0 * 0x100) + decimals, /* decimals */
135 NULL, 0, 2000, mf);
136
137 if (rc < 0)
138 dev_dbg(&mydev->udev->dev, "decimal retval = %d\n", rc);
139}
140
141#define MYDEV_ATTR_SIMPLE_UNSIGNED(name, update_fcn) \
142static ssize_t name##_show(struct device *dev, \
143 struct device_attribute *attr, char *buf) \
144{ \
145 struct usb_interface *intf = to_usb_interface(dev); \
146 struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
147 \
148 return sprintf(buf, "%u\n", mydev->name); \
149} \
150 \
151static ssize_t name##_store(struct device *dev, \
152 struct device_attribute *attr, const char *buf, size_t count) \
153{ \
154 struct usb_interface *intf = to_usb_interface(dev); \
155 struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
156 \
157 mydev->name = simple_strtoul(buf, NULL, 10); \
158 update_fcn(mydev); \
159 \
160 return count; \
161} \
162static DEVICE_ATTR_RW(name);
163
164static ssize_t text_show(struct device *dev,
165 struct device_attribute *attr, char *buf)
166{
167 struct usb_interface *intf = to_usb_interface(dev);
168 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
169
170 return sysfs_emit(buf, "%s\n", mydev->text);
171}
172
173static ssize_t text_store(struct device *dev,
174 struct device_attribute *attr, const char *buf, size_t count)
175{
176 struct usb_interface *intf = to_usb_interface(dev);
177 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
178 size_t end = my_memlen(buf, count);
179
180 if (end > sizeof(mydev->text))
181 return -EINVAL;
182
183 memset(mydev->text, 0, sizeof(mydev->text));
184 mydev->textlength = end;
185
186 if (end > 0)
187 memcpy(mydev->text, buf, end);
188
189 update_display_visual(mydev, GFP_KERNEL);
190 return count;
191}
192
193static DEVICE_ATTR_RW(text);
194
195static ssize_t decimals_show(struct device *dev,
196 struct device_attribute *attr, char *buf)
197{
198 struct usb_interface *intf = to_usb_interface(dev);
199 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
200 int i;
201 int pos;
202
203 for (i = 0; i < sizeof(mydev->decimals); i++) {
204 pos = sizeof(mydev->decimals) - 1 - i;
205 if (mydev->decimals[i] == 0)
206 buf[pos] = '0';
207 else if (mydev->decimals[i] == 1)
208 buf[pos] = '1';
209 else
210 buf[pos] = 'x';
211 }
212
213 buf[sizeof(mydev->decimals)] = '\n';
214 return sizeof(mydev->decimals) + 1;
215}
216
217static ssize_t decimals_store(struct device *dev,
218 struct device_attribute *attr, const char *buf, size_t count)
219{
220 struct usb_interface *intf = to_usb_interface(dev);
221 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
222 size_t end = my_memlen(buf, count);
223 int i;
224
225 if (end > sizeof(mydev->decimals))
226 return -EINVAL;
227
228 for (i = 0; i < end; i++)
229 if (buf[i] != '0' && buf[i] != '1')
230 return -EINVAL;
231
232 memset(mydev->decimals, 0, sizeof(mydev->decimals));
233 for (i = 0; i < end; i++)
234 if (buf[i] == '1')
235 mydev->decimals[end-1-i] = 1;
236
237 update_display_visual(mydev, GFP_KERNEL);
238
239 return count;
240}
241
242static DEVICE_ATTR_RW(decimals);
243
244static ssize_t textmode_show(struct device *dev,
245 struct device_attribute *attr, char *buf)
246{
247 struct usb_interface *intf = to_usb_interface(dev);
248 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
249 int i;
250
251 buf[0] = 0;
252
253 for (i = 0; i < ARRAY_SIZE(display_textmodes); i++) {
254 if (mydev->textmode == i) {
255 strcat(buf, " [");
256 strcat(buf, display_textmodes[i]);
257 strcat(buf, "] ");
258 } else {
259 strcat(buf, " ");
260 strcat(buf, display_textmodes[i]);
261 strcat(buf, " ");
262 }
263 }
264 strcat(buf, "\n");
265
266
267 return strlen(buf);
268}
269
270static ssize_t textmode_store(struct device *dev,
271 struct device_attribute *attr, const char *buf, size_t count)
272{
273 struct usb_interface *intf = to_usb_interface(dev);
274 struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
275 int i;
276
277 i = sysfs_match_string(display_textmodes, buf);
278 if (i < 0)
279 return i;
280
281 mydev->textmode = i;
282 update_display_visual(mydev, GFP_KERNEL);
283 return count;
284}
285
286static DEVICE_ATTR_RW(textmode);
287
288
289MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
290MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
291MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);
292
293static struct attribute *sevseg_attrs[] = {
294 &dev_attr_powered.attr,
295 &dev_attr_text.attr,
296 &dev_attr_textmode.attr,
297 &dev_attr_decimals.attr,
298 &dev_attr_mode_msb.attr,
299 &dev_attr_mode_lsb.attr,
300 NULL
301};
302ATTRIBUTE_GROUPS(sevseg);
303
304static int sevseg_probe(struct usb_interface *interface,
305 const struct usb_device_id *id)
306{
307 struct usb_device *udev = interface_to_usbdev(interface);
308 struct usb_sevsegdev *mydev = NULL;
309 int rc = -ENOMEM;
310
311 mydev = kzalloc(sizeof(struct usb_sevsegdev), GFP_KERNEL);
312 if (!mydev)
313 goto error_mem;
314
315 mydev->udev = usb_get_dev(udev);
316 mydev->intf = interface;
317 usb_set_intfdata(interface, mydev);
318
319 /* PM */
320 mydev->shadow_power = 1; /* currently active */
321 mydev->has_interface_pm = 0; /* have not issued autopm_get */
322
323 /*set defaults */
324 mydev->textmode = 0x02; /* ascii mode */
325 mydev->mode_msb = 0x06; /* 6 characters */
326 mydev->mode_lsb = 0x3f; /* scanmode for 6 chars */
327
328 dev_info(&interface->dev, "USB 7 Segment device now attached\n");
329 return 0;
330
331error_mem:
332 return rc;
333}
334
335static void sevseg_disconnect(struct usb_interface *interface)
336{
337 struct usb_sevsegdev *mydev;
338
339 mydev = usb_get_intfdata(interface);
340 usb_set_intfdata(interface, NULL);
341 usb_put_dev(mydev->udev);
342 kfree(mydev);
343 dev_info(&interface->dev, "USB 7 Segment now disconnected\n");
344}
345
346static int sevseg_suspend(struct usb_interface *intf, pm_message_t message)
347{
348 struct usb_sevsegdev *mydev;
349
350 mydev = usb_get_intfdata(intf);
351 mydev->shadow_power = 0;
352
353 return 0;
354}
355
356static int sevseg_resume(struct usb_interface *intf)
357{
358 struct usb_sevsegdev *mydev;
359
360 mydev = usb_get_intfdata(intf);
361 mydev->shadow_power = 1;
362 update_display_mode(mydev);
363 update_display_visual(mydev, GFP_NOIO);
364
365 return 0;
366}
367
368static int sevseg_reset_resume(struct usb_interface *intf)
369{
370 struct usb_sevsegdev *mydev;
371
372 mydev = usb_get_intfdata(intf);
373 mydev->shadow_power = 1;
374 update_display_mode(mydev);
375 update_display_visual(mydev, GFP_NOIO);
376
377 return 0;
378}
379
380static struct usb_driver sevseg_driver = {
381 .name = "usbsevseg",
382 .probe = sevseg_probe,
383 .disconnect = sevseg_disconnect,
384 .suspend = sevseg_suspend,
385 .resume = sevseg_resume,
386 .reset_resume = sevseg_reset_resume,
387 .id_table = id_table,
388 .dev_groups = sevseg_groups,
389 .supports_autosuspend = 1,
390};
391
392module_usb_driver(sevseg_driver);
393
394MODULE_AUTHOR(DRIVER_AUTHOR);
395MODULE_DESCRIPTION(DRIVER_DESC);
396MODULE_LICENSE("GPL");