Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
[linux-2.6] / drivers / usb / misc / phidgetkit.c
1 /*
2  * USB PhidgetInterfaceKit driver 1.0
3  *
4  * Copyright (C) 2004, 2006 Sean Young <sean@mess.org>
5  * Copyright (C) 2005 Daniel Saakes <daniel@saakes.net>
6  * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This is a driver for the USB PhidgetInterfaceKit.
14  */
15
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/module.h>
21 #include <linux/usb.h>
22
23 #include "phidget.h"
24
25 #define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
26 #define DRIVER_DESC "USB PhidgetInterfaceKit Driver"
27
28 #define USB_VENDOR_ID_GLAB              0x06c2
29 #define USB_DEVICE_ID_INTERFACEKIT004   0x0040
30 #define USB_DEVICE_ID_INTERFACEKIT01616 0x0044
31 #define USB_DEVICE_ID_INTERFACEKIT888   0x0045
32 #define USB_DEVICE_ID_INTERFACEKIT047   0x0051
33 #define USB_DEVICE_ID_INTERFACEKIT088   0x0053
34
35 #define USB_VENDOR_ID_WISEGROUP         0x0925
36 #define USB_DEVICE_ID_INTERFACEKIT884   0x8201
37
38 #define MAX_INTERFACES                  16
39
40 #define URB_INT_SIZE                    8
41
42 struct driver_interfacekit {
43         int sensors;
44         int inputs;
45         int outputs;
46         int has_lcd;
47         int amnesiac;
48 };
49
50 #define ifkit(_sensors, _inputs, _outputs, _lcd, _amnesiac)             \
51 {                                                                       \
52         .sensors        = _sensors,                                     \
53         .inputs         = _inputs,                                      \
54         .outputs        = _outputs,                                     \
55         .has_lcd        = _lcd,                                         \
56         .amnesiac       = _amnesiac                                     \
57 };
58
59 static const struct driver_interfacekit ph_004 = ifkit(0, 0, 4, 0, 0);
60 static const struct driver_interfacekit ph_888n = ifkit(8, 8, 8, 0, 1);
61 static const struct driver_interfacekit ph_888o = ifkit(8, 8, 8, 0, 0);
62 static const struct driver_interfacekit ph_047 = ifkit(0, 4, 7, 1, 0);
63 static const struct driver_interfacekit ph_884 = ifkit(8, 8, 4, 0, 0);
64 static const struct driver_interfacekit ph_088 = ifkit(0, 8, 8, 1, 0);
65 static const struct driver_interfacekit ph_01616 = ifkit(0, 16, 16, 0, 0);
66
67 static unsigned long device_no;
68
69 struct interfacekit {
70         struct usb_device *udev;
71         struct usb_interface *intf;
72         struct driver_interfacekit *ifkit;
73         struct device *dev;
74         unsigned long outputs;
75         int dev_no;
76         u8 inputs[MAX_INTERFACES];
77         u16 sensors[MAX_INTERFACES];
78         u8 lcd_files_on;
79
80         struct urb *irq;
81         unsigned char *data;
82         dma_addr_t data_dma;
83
84         struct delayed_work do_notify;
85         struct delayed_work do_resubmit;
86         unsigned long input_events;
87         unsigned long sensor_events;
88 };
89
90 static struct usb_device_id id_table[] = {
91         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT004),
92                 .driver_info = (kernel_ulong_t)&ph_004},
93         {USB_DEVICE_VER(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888, 0, 0x814),
94                 .driver_info = (kernel_ulong_t)&ph_888o},
95         {USB_DEVICE_VER(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888, 0x0815, 0xffff),
96                 .driver_info = (kernel_ulong_t)&ph_888n},
97         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT047),
98                 .driver_info = (kernel_ulong_t)&ph_047},
99         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT088),
100                 .driver_info = (kernel_ulong_t)&ph_088},
101         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT01616),
102                 .driver_info = (kernel_ulong_t)&ph_01616},
103         {USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_INTERFACEKIT884),
104                 .driver_info = (kernel_ulong_t)&ph_884},
105         {}
106 };
107 MODULE_DEVICE_TABLE(usb, id_table);
108
109 static int set_outputs(struct interfacekit *kit)
110 {
111         u8 *buffer;
112         int retval;
113
114         buffer = kzalloc(4, GFP_KERNEL);
115         if (!buffer) {
116                 dev_err(&kit->udev->dev, "%s - out of memory\n", __func__);
117                 return -ENOMEM;
118         }
119         buffer[0] = (u8)kit->outputs;
120         buffer[1] = (u8)(kit->outputs >> 8);
121
122         dev_dbg(&kit->udev->dev, "sending data: 0x%04x\n", (u16)kit->outputs);
123
124         retval = usb_control_msg(kit->udev,
125                          usb_sndctrlpipe(kit->udev, 0),
126                          0x09, 0x21, 0x0200, 0x0000, buffer, 4, 2000);
127
128         if (retval != 4)
129                 dev_err(&kit->udev->dev, "usb_control_msg returned %d\n", 
130                                 retval);
131         kfree(buffer);
132
133         if (kit->ifkit->amnesiac)
134                 schedule_delayed_work(&kit->do_resubmit, HZ / 2);
135
136         return retval < 0 ? retval : 0;
137 }
138
139 static int change_string(struct interfacekit *kit, const char *display, unsigned char row)
140 {
141         unsigned char *buffer;
142         unsigned char *form_buffer;
143         int retval = -ENOMEM;
144         int i,j, len, buf_ptr;
145         
146         buffer = kmalloc(8, GFP_KERNEL);
147         form_buffer = kmalloc(30, GFP_KERNEL);
148         if ((!buffer) || (!form_buffer)) {
149                 dev_err(&kit->udev->dev, "%s - out of memory\n", __func__);
150                 goto exit;
151         }
152
153         len = strlen(display);
154         if (len > 20)
155                 len = 20;
156
157         dev_dbg(&kit->udev->dev, "Setting LCD line %d to %s\n", row, display);
158
159         form_buffer[0] = row * 0x40 + 0x80;
160         form_buffer[1] = 0x02;
161         buf_ptr = 2;
162         for (i = 0; i<len; i++)
163                 form_buffer[buf_ptr++] = display[i];
164
165         for (i = 0; i < (20 - len); i++)
166                 form_buffer[buf_ptr++] = 0x20;
167         form_buffer[buf_ptr++] = 0x01;
168         form_buffer[buf_ptr++] = row * 0x40 + 0x80 + strlen(display);
169
170         for (i = 0; i < buf_ptr; i += 7) {
171                 if ((buf_ptr - i) > 7)
172                         len = 7;
173                 else
174                         len = (buf_ptr - i);
175                 for (j = 0; j < len; j++)
176                         buffer[j] = form_buffer[i + j];
177                 buffer[7] = len;
178
179                 retval = usb_control_msg(kit->udev,
180                                  usb_sndctrlpipe(kit->udev, 0),
181                                  0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
182                 if (retval < 0)
183                         goto exit;
184         }
185
186         retval = 0;
187 exit:
188         kfree(buffer);
189         kfree(form_buffer);
190
191         return retval;
192 }
193
194 #define set_lcd_line(number)    \
195 static ssize_t lcd_line_##number(struct device *dev,                    \
196                                         struct device_attribute *attr,  \
197                                         const char *buf, size_t count)  \
198 {                                                                       \
199         struct interfacekit *kit = dev_get_drvdata(dev);                \
200         change_string(kit, buf, number - 1);                            \
201         return count;                                                   \
202 }
203
204 #define lcd_line_attr(number)                                           \
205         __ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number)
206
207 set_lcd_line(1);
208 set_lcd_line(2);
209
210 static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
211 {
212         struct interfacekit *kit = dev_get_drvdata(dev);
213         int enabled;
214         unsigned char *buffer;
215         int retval = -ENOMEM;
216         
217         buffer = kzalloc(8, GFP_KERNEL);
218         if (!buffer) {
219                 dev_err(&kit->udev->dev, "%s - out of memory\n", __func__);
220                 goto exit;
221         }
222
223         if (sscanf(buf, "%d", &enabled) < 1) {
224                 retval = -EINVAL;
225                 goto exit;
226         }
227         if (enabled)
228                 buffer[0] = 0x01;
229         buffer[7] = 0x11;
230
231         dev_dbg(&kit->udev->dev, "Setting backlight to %s\n", enabled ? "on" : "off");
232         
233         retval = usb_control_msg(kit->udev,
234                          usb_sndctrlpipe(kit->udev, 0),
235                          0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
236         if (retval < 0)
237                 goto exit;
238
239         retval = count;
240 exit:
241         kfree(buffer);
242         return retval;
243 }
244
245 static struct device_attribute dev_lcd_line_attrs[] = {
246         lcd_line_attr(1),
247         lcd_line_attr(2),
248         __ATTR(backlight, S_IWUGO, NULL, set_backlight)
249 };
250
251 static void remove_lcd_files(struct interfacekit *kit)
252 {
253         int i;
254
255         if (kit->lcd_files_on) {
256                 dev_dbg(&kit->udev->dev, "Removing lcd files\n");
257
258                 for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++)
259                         device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
260         }
261 }
262
263 static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
264 {
265         struct interfacekit *kit = dev_get_drvdata(dev);
266         int enable;
267         int i, rc;
268         
269         if (kit->ifkit->has_lcd == 0)
270                 return -ENODEV;
271
272         if (sscanf(buf, "%d", &enable) < 1)
273                 return -EINVAL;
274
275         if (enable) {
276                 if (!kit->lcd_files_on) {
277                         dev_dbg(&kit->udev->dev, "Adding lcd files\n");
278                         for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++) {
279                                 rc = device_create_file(kit->dev,
280                                         &dev_lcd_line_attrs[i]);
281                                 if (rc)
282                                         goto out;
283                         }
284                         kit->lcd_files_on = 1;
285                 }
286         } else {
287                 if (kit->lcd_files_on) {
288                         remove_lcd_files(kit);
289                         kit->lcd_files_on = 0;
290                 }
291         }
292         
293         return count;
294 out:
295         while (i-- > 0)
296                 device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
297
298         return rc;
299 }
300
301 static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);
302
303 static void interfacekit_irq(struct urb *urb)
304 {
305         struct interfacekit *kit = urb->context;
306         unsigned char *buffer = kit->data;
307         int i, level, sensor;
308         int retval;
309         int status = urb->status;
310
311         switch (status) {
312         case 0:                 /* success */
313                 break;
314         case -ECONNRESET:       /* unlink */
315         case -ENOENT:
316         case -ESHUTDOWN:
317                 return;
318         /* -EPIPE:  should clear the halt */
319         default:                /* error */
320                 goto resubmit;
321         }
322
323         /* digital inputs */
324         if (kit->ifkit->inputs == 16) {
325                 for (i=0; i < 8; i++) {
326                         level = (buffer[0] >> i) & 1;
327                         if (kit->inputs[i] != level) {
328                                 kit->inputs[i] = level;
329                                 set_bit(i, &kit->input_events);
330                         }
331                         level = (buffer[1] >> i) & 1;
332                         if (kit->inputs[8 + i] != level) {
333                                 kit->inputs[8 + i] = level;
334                                 set_bit(8 + i, &kit->input_events);
335                         }
336                 }
337         }
338         else if (kit->ifkit->inputs == 8) {
339                 for (i=0; i < 8; i++) {
340                         level = (buffer[1] >> i) & 1;
341                         if (kit->inputs[i] != level) {
342                                 kit->inputs[i] = level;
343                                 set_bit(i, &kit->input_events);
344                         }
345                 }
346         }
347
348         /* analog inputs */
349         if (kit->ifkit->sensors) {
350                 sensor = (buffer[0] & 1) ? 4 : 0;
351
352                 level = buffer[2] + (buffer[3] & 0x0f) * 256;
353                 if (level != kit->sensors[sensor]) {
354                         kit->sensors[sensor] = level;
355                         set_bit(sensor, &kit->sensor_events);
356                 }
357                 sensor++;
358                 level = buffer[4] + (buffer[3] & 0xf0) * 16;
359                 if (level != kit->sensors[sensor]) {
360                         kit->sensors[sensor] = level;
361                         set_bit(sensor, &kit->sensor_events);
362                 }
363                 sensor++;
364                 level = buffer[5] + (buffer[6] & 0x0f) * 256;
365                 if (level != kit->sensors[sensor]) {
366                         kit->sensors[sensor] = level;
367                         set_bit(sensor, &kit->sensor_events);
368                 }
369                 sensor++;
370                 level = buffer[7] + (buffer[6] & 0xf0) * 16;
371                 if (level != kit->sensors[sensor]) {
372                         kit->sensors[sensor] = level;
373                         set_bit(sensor, &kit->sensor_events);
374                 }
375         }
376
377         if (kit->input_events || kit->sensor_events)
378                 schedule_delayed_work(&kit->do_notify, 0);
379
380 resubmit:
381         retval = usb_submit_urb(urb, GFP_ATOMIC);
382         if (retval)
383                 err("can't resubmit intr, %s-%s/interfacekit0, retval %d",
384                         kit->udev->bus->bus_name,
385                         kit->udev->devpath, retval);
386 }
387
388 static void do_notify(struct work_struct *work)
389 {
390         struct interfacekit *kit =
391                 container_of(work, struct interfacekit, do_notify.work);
392         int i;
393         char sysfs_file[8];
394
395         for (i=0; i<kit->ifkit->inputs; i++) {
396                 if (test_and_clear_bit(i, &kit->input_events)) {
397                         sprintf(sysfs_file, "input%d", i + 1);
398                         sysfs_notify(&kit->dev->kobj, NULL, sysfs_file);
399                 }
400         }
401
402         for (i=0; i<kit->ifkit->sensors; i++) {
403                 if (test_and_clear_bit(i, &kit->sensor_events)) {
404                         sprintf(sysfs_file, "sensor%d", i + 1);
405                         sysfs_notify(&kit->dev->kobj, NULL, sysfs_file);
406                 }
407         }
408 }
409
410 static void do_resubmit(struct work_struct *work)
411 {
412         struct interfacekit *kit =
413                 container_of(work, struct interfacekit, do_resubmit.work);
414         set_outputs(kit);
415 }
416
417 #define show_set_output(value)          \
418 static ssize_t set_output##value(struct device *dev,                    \
419                                         struct device_attribute *attr,  \
420                                         const char *buf, size_t count)  \
421 {                                                                       \
422         struct interfacekit *kit = dev_get_drvdata(dev);                \
423         int enable;                                                     \
424         int retval;                                                     \
425                                                                         \
426         if (sscanf(buf, "%d", &enable) < 1)                             \
427                 return -EINVAL;                                         \
428                                                                         \
429         if (enable)                                                     \
430                 set_bit(value - 1, &kit->outputs);                      \
431         else                                                            \
432                 clear_bit(value - 1, &kit->outputs);                    \
433                                                                         \
434         retval = set_outputs(kit);                                      \
435                                                                         \
436         return retval ? retval : count;                                 \
437 }                                                                       \
438                                                                         \
439 static ssize_t show_output##value(struct device *dev,                   \
440                                         struct device_attribute *attr,  \
441                                         char *buf)                      \
442 {                                                                       \
443         struct interfacekit *kit = dev_get_drvdata(dev);                \
444                                                                         \
445         return sprintf(buf, "%d\n", !!test_bit(value - 1, &kit->outputs));\
446 }
447
448 #define output_attr(value)                                              \
449         __ATTR(output##value, S_IWUGO | S_IRUGO,                        \
450                 show_output##value, set_output##value)
451
452 show_set_output(1);
453 show_set_output(2);
454 show_set_output(3);
455 show_set_output(4);
456 show_set_output(5);
457 show_set_output(6);
458 show_set_output(7);
459 show_set_output(8);
460 show_set_output(9);
461 show_set_output(10);
462 show_set_output(11);
463 show_set_output(12);
464 show_set_output(13);
465 show_set_output(14);
466 show_set_output(15);
467 show_set_output(16);
468
469 static struct device_attribute dev_output_attrs[] = {
470         output_attr(1), output_attr(2), output_attr(3), output_attr(4),
471         output_attr(5), output_attr(6), output_attr(7), output_attr(8),
472         output_attr(9), output_attr(10), output_attr(11), output_attr(12),
473         output_attr(13), output_attr(14), output_attr(15), output_attr(16)
474 };
475
476 #define show_input(value)       \
477 static ssize_t show_input##value(struct device *dev,                    \
478                         struct device_attribute *attr, char *buf)       \
479 {                                                                       \
480         struct interfacekit *kit = dev_get_drvdata(dev);                \
481                                                                         \
482         return sprintf(buf, "%d\n", (int)kit->inputs[value - 1]);       \
483 }
484
485 #define input_attr(value)                                               \
486         __ATTR(input##value, S_IRUGO, show_input##value, NULL)
487
488 show_input(1);
489 show_input(2);
490 show_input(3);
491 show_input(4);
492 show_input(5);
493 show_input(6);
494 show_input(7);
495 show_input(8);
496 show_input(9);
497 show_input(10);
498 show_input(11);
499 show_input(12);
500 show_input(13);
501 show_input(14);
502 show_input(15);
503 show_input(16);
504
505 static struct device_attribute dev_input_attrs[] = {
506         input_attr(1), input_attr(2), input_attr(3), input_attr(4),
507         input_attr(5), input_attr(6), input_attr(7), input_attr(8),
508         input_attr(9), input_attr(10), input_attr(11), input_attr(12),
509         input_attr(13), input_attr(14), input_attr(15), input_attr(16)
510 };
511
512 #define show_sensor(value)      \
513 static ssize_t show_sensor##value(struct device *dev,                   \
514                                         struct device_attribute *attr,  \
515                                         char *buf)                      \
516 {                                                                       \
517         struct interfacekit *kit = dev_get_drvdata(dev);                \
518                                                                         \
519         return sprintf(buf, "%d\n", (int)kit->sensors[value - 1]);      \
520 }
521
522 #define sensor_attr(value)                                              \
523         __ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL)
524
525 show_sensor(1);
526 show_sensor(2);
527 show_sensor(3);
528 show_sensor(4);
529 show_sensor(5);
530 show_sensor(6);
531 show_sensor(7);
532 show_sensor(8);
533
534 static struct device_attribute dev_sensor_attrs[] = {
535         sensor_attr(1), sensor_attr(2), sensor_attr(3), sensor_attr(4),
536         sensor_attr(5), sensor_attr(6), sensor_attr(7), sensor_attr(8)
537 };
538
539 static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
540 {
541         struct usb_device *dev = interface_to_usbdev(intf);
542         struct usb_host_interface *interface;
543         struct usb_endpoint_descriptor *endpoint;
544         struct interfacekit *kit;
545         struct driver_interfacekit *ifkit;
546         int pipe, maxp, rc = -ENOMEM;
547         int bit, value, i;
548
549         ifkit = (struct driver_interfacekit *)id->driver_info;
550         if (!ifkit)
551                 return -ENODEV;
552
553         interface = intf->cur_altsetting;
554         if (interface->desc.bNumEndpoints != 1)
555                 return -ENODEV;
556
557         endpoint = &interface->endpoint[0].desc;
558         if (!usb_endpoint_dir_in(endpoint))
559                 return -ENODEV;
560         /*
561          * bmAttributes
562          */
563         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
564         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
565         
566         kit = kzalloc(sizeof(*kit), GFP_KERNEL);
567         if (!kit)
568                 goto out;
569
570         kit->dev_no = -1;
571         kit->ifkit = ifkit;
572         kit->data = usb_buffer_alloc(dev, URB_INT_SIZE, GFP_ATOMIC, &kit->data_dma);
573         if (!kit->data)
574                 goto out;
575
576         kit->irq = usb_alloc_urb(0, GFP_KERNEL);
577         if (!kit->irq)
578                 goto out;
579
580         kit->udev = usb_get_dev(dev);
581         kit->intf = intf;
582         INIT_DELAYED_WORK(&kit->do_notify, do_notify);
583         INIT_DELAYED_WORK(&kit->do_resubmit, do_resubmit);
584         usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
585                         maxp > URB_INT_SIZE ? URB_INT_SIZE : maxp,
586                         interfacekit_irq, kit, endpoint->bInterval);
587         kit->irq->transfer_dma = kit->data_dma;
588         kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
589
590         usb_set_intfdata(intf, kit);
591
592         do {
593                 bit = find_first_zero_bit(&device_no, sizeof(device_no));
594                 value = test_and_set_bit(bit, &device_no);
595         } while(value);
596         kit->dev_no = bit;
597
598         kit->dev = device_create(phidget_class, &kit->udev->dev, 0,
599                         "interfacekit%d", kit->dev_no);
600         if (IS_ERR(kit->dev)) {
601                 rc = PTR_ERR(kit->dev);
602                 kit->dev = NULL;
603                 goto out;
604         }
605         dev_set_drvdata(kit->dev, kit);
606
607         if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
608                 rc = -EIO;
609                 goto out;
610         }
611
612         for (i=0; i<ifkit->outputs; i++ ) {
613                 rc = device_create_file(kit->dev, &dev_output_attrs[i]);
614                 if (rc)
615                         goto out2;
616         }
617
618         for (i=0; i<ifkit->inputs; i++ ) {
619                 rc = device_create_file(kit->dev, &dev_input_attrs[i]);
620                 if (rc)
621                         goto out3;
622         }
623
624         for (i=0; i<ifkit->sensors; i++ ) {
625                 rc = device_create_file(kit->dev, &dev_sensor_attrs[i]);
626                 if (rc)
627                         goto out4;
628         }
629
630         if (ifkit->has_lcd) {
631                 rc = device_create_file(kit->dev, &dev_attr_lcd);
632                 if (rc)
633                         goto out4;
634
635         }
636
637         dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
638                         ifkit->sensors, ifkit->inputs, ifkit->outputs);
639
640         return 0;
641
642 out4:
643         while (i-- > 0)
644                 device_remove_file(kit->dev, &dev_sensor_attrs[i]);
645
646         i = ifkit->inputs;
647 out3:
648         while (i-- > 0)
649                 device_remove_file(kit->dev, &dev_input_attrs[i]);
650
651         i = ifkit->outputs;
652 out2:
653         while (i-- > 0)
654                 device_remove_file(kit->dev, &dev_output_attrs[i]);
655 out:
656         if (kit) {
657                 usb_free_urb(kit->irq);
658                 if (kit->data)
659                         usb_buffer_free(dev, URB_INT_SIZE, kit->data, kit->data_dma);
660                 if (kit->dev)
661                         device_unregister(kit->dev);
662                 if (kit->dev_no >= 0)
663                         clear_bit(kit->dev_no, &device_no);
664
665                 kfree(kit);
666         }
667
668         return rc;
669 }
670
671 static void interfacekit_disconnect(struct usb_interface *interface)
672 {
673         struct interfacekit *kit;
674         int i;
675
676         kit = usb_get_intfdata(interface);
677         usb_set_intfdata(interface, NULL);
678         if (!kit)
679                 return;
680
681         usb_kill_urb(kit->irq);
682         usb_free_urb(kit->irq);
683         usb_buffer_free(kit->udev, URB_INT_SIZE, kit->data, kit->data_dma);
684
685         cancel_delayed_work(&kit->do_notify);
686         cancel_delayed_work(&kit->do_resubmit);
687
688         for (i=0; i<kit->ifkit->outputs; i++)
689                 device_remove_file(kit->dev, &dev_output_attrs[i]);
690
691         for (i=0; i<kit->ifkit->inputs; i++)
692                 device_remove_file(kit->dev, &dev_input_attrs[i]);
693
694         for (i=0; i<kit->ifkit->sensors; i++)
695                 device_remove_file(kit->dev, &dev_sensor_attrs[i]);
696
697         if (kit->ifkit->has_lcd) {
698                 device_remove_file(kit->dev, &dev_attr_lcd);
699                 remove_lcd_files(kit);
700         }
701
702         device_unregister(kit->dev);
703
704         dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
705                 kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);
706
707         usb_put_dev(kit->udev);
708         clear_bit(kit->dev_no, &device_no);
709
710         kfree(kit);
711 }
712
713 static struct usb_driver interfacekit_driver = {
714         .name = "phidgetkit",
715         .probe = interfacekit_probe,
716         .disconnect = interfacekit_disconnect,
717         .id_table = id_table
718 };
719
720 static int __init interfacekit_init(void)
721 {
722         int retval = 0;
723
724         retval = usb_register(&interfacekit_driver);
725         if (retval)
726                 err("usb_register failed. Error number %d", retval);
727
728         return retval;
729 }
730
731 static void __exit interfacekit_exit(void)
732 {
733         usb_deregister(&interfacekit_driver);
734 }
735
736 module_init(interfacekit_init);
737 module_exit(interfacekit_exit);
738
739 MODULE_AUTHOR(DRIVER_AUTHOR);
740 MODULE_DESCRIPTION(DRIVER_DESC);
741 MODULE_LICENSE("GPL");