summaryrefslogtreecommitdiff
path: root/drivers/usb/misc/phidgetkit.c
blob: bfbbbfbb92bcca4ef3b56fe8aea5241ef057ca7b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
/*
 * USB PhidgetInterfaceKit driver 1.0
 *
 * Copyright (C) 2004, 2006 Sean Young <sean@mess.org>
 * Copyright (C) 2005 Daniel Saakes <daniel@saakes.net>
 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This is a driver for the USB PhidgetInterfaceKit.
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>

#define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
#define DRIVER_DESC "USB PhidgetInterfaceKit Driver"

#define USB_VENDOR_ID_GLAB		0x06c2
#define USB_DEVICE_ID_INTERFACEKIT004	0x0040
#define USB_DEVICE_ID_INTERFACEKIT01616	0x0044
#define USB_DEVICE_ID_INTERFACEKIT888	0x0045
#define USB_DEVICE_ID_INTERFACEKIT047	0x0051
#define USB_DEVICE_ID_INTERFACEKIT088	0x0053

#define USB_VENDOR_ID_WISEGROUP		0x0925
#define USB_DEVICE_ID_INTERFACEKIT884	0x8201

#define MAX_INTERFACES			16

#define URB_INT_SIZE			8

struct driver_interfacekit {
	int sensors;
	int inputs;
	int outputs;
	int has_lcd;
};
#define ifkit(_sensors, _inputs, _outputs, _lcd)			\
static struct driver_interfacekit ph_##_sensors##_inputs##_outputs = {	\
	.sensors	= _sensors,					\
	.inputs		= _inputs,					\
	.outputs	= _outputs,					\
	.has_lcd	= _lcd,						\
};
ifkit(0, 0, 4, 0);
ifkit(8, 8, 8, 0);
ifkit(0, 4, 7, 1);
ifkit(8, 8, 4, 0);
ifkit(0, 8, 8, 1);
ifkit(0, 16, 16, 0);

struct interfacekit {
	struct usb_device *udev;
	struct usb_interface *intf;
	struct driver_interfacekit *ifkit;
	unsigned long outputs;
	u8 inputs[MAX_INTERFACES];
	u16 sensors[MAX_INTERFACES];
	u8 lcd_files_on;

	struct urb *irq;
	unsigned char *data;
	dma_addr_t data_dma;

	struct work_struct do_notify;
	unsigned long input_events;
	unsigned long sensor_events;
};

static struct usb_device_id id_table[] = {
	{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT004),
		.driver_info = (kernel_ulong_t)&ph_004},
	{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888),
		.driver_info = (kernel_ulong_t)&ph_888},
	{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT047),
		.driver_info = (kernel_ulong_t)&ph_047},
	{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT088),
		.driver_info = (kernel_ulong_t)&ph_088},
	{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT01616),
		.driver_info = (kernel_ulong_t)&ph_01616},
	{USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_INTERFACEKIT884),
		.driver_info = (kernel_ulong_t)&ph_884},
	{}
};
MODULE_DEVICE_TABLE(usb, id_table);

static int change_outputs(struct interfacekit *kit, int output_num, int enable)
{
	u8 *buffer;
	int retval;

	if (enable)
		set_bit(output_num, &kit->outputs);
	else
		clear_bit(output_num, &kit->outputs);

	buffer = kzalloc(4, GFP_KERNEL);
	if (!buffer) {
		dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	buffer[0] = (u8)kit->outputs;
	buffer[1] = (u8)(kit->outputs >> 8);

	dev_dbg(&kit->udev->dev, "sending data: 0x%04x\n", (u16)kit->outputs);

	retval = usb_control_msg(kit->udev,
			 usb_sndctrlpipe(kit->udev, 0),
			 0x09, 0x21, 0x0200, 0x0000, buffer, 4, 2000);

	if (retval != 4)
		dev_err(&kit->udev->dev, "usb_control_msg returned %d\n", 
				retval);
	kfree(buffer);

	return retval < 0 ? retval : 0;
}

static int change_string(struct interfacekit *kit, const char *display, unsigned char row)
{
	unsigned char *buffer;
	unsigned char *form_buffer;
	int retval = -ENOMEM;
	int i,j, len, buf_ptr;
	
	buffer = kmalloc(8, GFP_KERNEL);
	form_buffer = kmalloc(30, GFP_KERNEL);
	if ((!buffer) || (!form_buffer)) {
		dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
		goto exit;
	}

	len = strlen(display);
	if (len > 20)
		len = 20;

	dev_dbg(&kit->udev->dev, "Setting LCD line %d to %s\n", row, display);

	form_buffer[0] = row * 0x40 + 0x80;
	form_buffer[1] = 0x02;
	buf_ptr = 2;
	for (i = 0; i<len; i++)
		form_buffer[buf_ptr++] = display[i];

	for (i = 0; i < (20 - len); i++)
		form_buffer[buf_ptr++] = 0x20;
	form_buffer[buf_ptr++] = 0x01;
	form_buffer[buf_ptr++] = row * 0x40 + 0x80 + strlen(display);

	for (i = 0; i < buf_ptr; i += 7) {
		if ((buf_ptr - i) > 7)
			len = 7;
		else
			len = (buf_ptr - i);
		for (j = 0; j < len; j++)
			buffer[j] = form_buffer[i + j];
		buffer[7] = len;

		retval = usb_control_msg(kit->udev,
				 usb_sndctrlpipe(kit->udev, 0),
				 0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
		if (retval < 0)
			goto exit;
	}

	retval = 0;
exit:
	kfree(buffer);
	kfree(form_buffer);

	return retval;
}

#define set_lcd_line(number)	\
static ssize_t lcd_line_##number(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)	\
{											\
	struct usb_interface *intf = to_usb_interface(dev);				\
	struct interfacekit *kit = usb_get_intfdata(intf);				\
	change_string(kit, buf, number - 1);						\
	return count;									\
}											\
static DEVICE_ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number);
set_lcd_line(1);
set_lcd_line(2);

static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct usb_interface *intf = to_usb_interface(dev);
	struct interfacekit *kit = usb_get_intfdata(intf);
	int enabled;
	unsigned char *buffer;
	int retval = -ENOMEM;
	
	buffer = kzalloc(8, GFP_KERNEL);
	if (!buffer) {
		dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
		goto exit;
	}

	if (sscanf(buf, "%d", &enabled) < 1) {
		retval = -EINVAL;
		goto exit;
	}
	if (enabled)
		buffer[0] = 0x01;
	buffer[7] = 0x11;

	dev_dbg(&kit->udev->dev, "Setting backlight to %s\n", enabled ? "on" : "off");
	
	retval = usb_control_msg(kit->udev,
			 usb_sndctrlpipe(kit->udev, 0),
			 0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
	if (retval < 0)
		goto exit;

	retval = count;
exit:
	kfree(buffer);
	return retval;
}
static DEVICE_ATTR(backlight, S_IWUGO, NULL, set_backlight);

static void remove_lcd_files(struct interfacekit *kit)
{
	if (kit->lcd_files_on) {
		dev_dbg(&kit->udev->dev, "Removing lcd files\n");
		device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_1);
		device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_2);
		device_remove_file(&kit->intf->dev, &dev_attr_backlight);
	}
}

static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct usb_interface *intf = to_usb_interface(dev);
	struct interfacekit *kit = usb_get_intfdata(intf);
	int enable;
	
	if (kit->ifkit->has_lcd == 0)
		return -ENODEV;

	if (sscanf(buf, "%d", &enable) < 1)
		return -EINVAL;

	if (enable) {
		if (!kit->lcd_files_on) {
			dev_dbg(&kit->udev->dev, "Adding lcd files\n");
			device_create_file(&kit->intf->dev, &dev_attr_lcd_line_1);
			device_create_file(&kit->intf->dev, &dev_attr_lcd_line_2);
			device_create_file(&kit->intf->dev, &dev_attr_backlight);
			kit->lcd_files_on = 1;
		}
	} else {
		if (kit->lcd_files_on) {
			remove_lcd_files(kit);
			kit->lcd_files_on = 0;
		}
	}
	
	return count;
}
static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);

static void interfacekit_irq(struct urb *urb, struct pt_regs *regs)
{
	struct interfacekit *kit = urb->context;
	unsigned char *buffer = kit->data;
	int i, level, sensor;
	int status;

	switch (urb->status) {
	case 0:			/* success */
		break;
	case -ECONNRESET:	/* unlink */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	/* -EPIPE:  should clear the halt */
	default:		/* error */
		goto resubmit;
	}

	/* digital inputs */
	if (kit->ifkit->inputs == 16) {
		for (i=0; i < 8; i++) {
			level = (buffer[0] >> i) & 1;
			if (kit->inputs[i] != level) {
				kit->inputs[i] = level;
				set_bit(i, &kit->input_events);
			}
			level = (buffer[1] >> i) & 1;
			if (kit->inputs[8 + i] != level) {
				kit->inputs[8 + i] = level;
				set_bit(8 + i, &kit->input_events);
			}
		}
	}
	else if (kit->ifkit->inputs == 8) {
		for (i=0; i < 8; i++) {
			level = (buffer[1] >> i) & 1;
			if (kit->inputs[i] != level) {
				kit->inputs[i] = level;
				set_bit(i, &kit->input_events);
			}
		}
	}

	/* analog inputs */
	if (kit->ifkit->sensors) {
		sensor = (buffer[0] & 1) ? 4 : 0;

		level = buffer[2] + (buffer[3] & 0x0f) * 256;
		if (level != kit->sensors[sensor]) {
			kit->sensors[sensor] = level;
			set_bit(sensor, &kit->sensor_events);
		}
		sensor++;
		level = buffer[4] + (buffer[3] & 0xf0) * 16;
		if (level != kit->sensors[sensor]) {
			kit->sensors[sensor] = level;
			set_bit(sensor, &kit->sensor_events);
		}
		sensor++;
		level = buffer[5] + (buffer[6] & 0x0f) * 256;
		if (level != kit->sensors[sensor]) {
			kit->sensors[sensor] = level;
			set_bit(sensor, &kit->sensor_events);
		}
		sensor++;
		level = buffer[7] + (buffer[6] & 0xf0) * 16;
		if (level != kit->sensors[sensor]) {
			kit->sensors[sensor] = level;
			set_bit(sensor, &kit->sensor_events);
		}
	}

	if (kit->input_events || kit->sensor_events)
		schedule_work(&kit->do_notify);

resubmit:
	status = usb_submit_urb(urb, SLAB_ATOMIC);
	if (status)
		err("can't resubmit intr, %s-%s/interfacekit0, status %d",
			kit->udev->bus->bus_name,
			kit->udev->devpath, status);
}

static void do_notify(void *data)
{
	struct interfacekit *kit = data;
	int i;
	char sysfs_file[8];

	for (i=0; i<kit->ifkit->inputs; i++) {
		if (test_and_clear_bit(i, &kit->input_events)) {
			sprintf(sysfs_file, "input%d", i + 1);
			sysfs_notify(&kit->intf->dev.kobj, NULL, sysfs_file);
		}
	}

	for (i=0; i<kit->ifkit->sensors; i++) {
		if (test_and_clear_bit(i, &kit->sensor_events)) {
			sprintf(sysfs_file, "sensor%d", i + 1);
			sysfs_notify(&kit->intf->dev.kobj, NULL, sysfs_file);
		}
	}
}

#define show_set_output(value)		\
static ssize_t set_output##value(struct device *dev, struct device_attribute *attr, const char *buf,	\
							size_t count)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct interfacekit *kit = usb_get_intfdata(intf);		\
	int enabled;							\
	int retval;							\
									\
	if (sscanf(buf, "%d", &enabled) < 1)				\
		return -EINVAL;						\
									\
	retval = change_outputs(kit, value - 1, enabled);		\
									\
	return retval ? retval : count;					\
}									\
									\
static ssize_t show_output##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct interfacekit *kit = usb_get_intfdata(intf);		\
									\
	return sprintf(buf, "%d\n", !!test_bit(value - 1, &kit->outputs));\
}									\
static DEVICE_ATTR(output##value, S_IWUGO | S_IRUGO,			\
		show_output##value, set_output##value);
show_set_output(1);
show_set_output(2);
show_set_output(3);
show_set_output(4);
show_set_output(5);
show_set_output(6);
show_set_output(7);
show_set_output(8);
show_set_output(9);
show_set_output(10);
show_set_output(11);
show_set_output(12);
show_set_output(13);
show_set_output(14);
show_set_output(15);
show_set_output(16);

#define show_input(value)	\
static ssize_t show_input##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct interfacekit *kit = usb_get_intfdata(intf);		\
									\
	return sprintf(buf, "%d\n", (int)kit->inputs[value - 1]);	\
}									\
static DEVICE_ATTR(input##value, S_IRUGO, show_input##value, NULL);

show_input(1);
show_input(2);
show_input(3);
show_input(4);
show_input(5);
show_input(6);
show_input(7);
show_input(8);
show_input(9);
show_input(10);
show_input(11);
show_input(12);
show_input(13);
show_input(14);
show_input(15);
show_input(16);

#define show_sensor(value)	\
static ssize_t show_sensor##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct interfacekit *kit = usb_get_intfdata(intf);		\
									\
	return sprintf(buf, "%d\n", (int)kit->sensors[value - 1]);	\
}									\
static DEVICE_ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL);

show_sensor(1);
show_sensor(2);
show_sensor(3);
show_sensor(4);
show_sensor(5);
show_sensor(6);
show_sensor(7);
show_sensor(8);

static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct interfacekit *kit;
	struct driver_interfacekit *ifkit;
	int pipe, maxp, rc = -ENOMEM;

	ifkit = (struct driver_interfacekit *)id->driver_info;
	if (!ifkit)
		return -ENODEV;

	interface = intf->cur_altsetting;
	if (interface->desc.bNumEndpoints != 1)
		return -ENODEV;

	endpoint = &interface->endpoint[0].desc;
	if (!(endpoint->bEndpointAddress & 0x80)) 
		return -ENODEV;
	/*
	 * bmAttributes
	 */
	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
	
	kit = kzalloc(sizeof(*kit), GFP_KERNEL);
	if (!kit)
		goto out;

	kit->ifkit = ifkit;
	kit->data = usb_buffer_alloc(dev, URB_INT_SIZE, SLAB_ATOMIC, &kit->data_dma);
	if (!kit->data)
		goto out;

	kit->irq = usb_alloc_urb(0, GFP_KERNEL);
	if (!kit->irq)
		goto out;

	kit->udev = usb_get_dev(dev);
	kit->intf = intf;
	INIT_WORK(&kit->do_notify, do_notify, kit);
	usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
			maxp > URB_INT_SIZE ? URB_INT_SIZE : maxp,
			interfacekit_irq, kit, endpoint->bInterval);
	kit->irq->transfer_dma = kit->data_dma;
	kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	usb_set_intfdata(intf, kit);

	if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
		rc = -EIO;
		goto out;
	}

	if (ifkit->outputs >= 4) {
		device_create_file(&intf->dev, &dev_attr_output1);
		device_create_file(&intf->dev, &dev_attr_output2);
		device_create_file(&intf->dev, &dev_attr_output3);
		device_create_file(&intf->dev, &dev_attr_output4);
	}
	if (ifkit->outputs >= 8) {
		device_create_file(&intf->dev, &dev_attr_output5);
		device_create_file(&intf->dev, &dev_attr_output6);
		device_create_file(&intf->dev, &dev_attr_output7);
		device_create_file(&intf->dev, &dev_attr_output8);
	} 
	if (ifkit->outputs == 16) {
		device_create_file(&intf->dev, &dev_attr_output9);
		device_create_file(&intf->dev, &dev_attr_output10);
		device_create_file(&intf->dev, &dev_attr_output11);
		device_create_file(&intf->dev, &dev_attr_output12);
		device_create_file(&intf->dev, &dev_attr_output13);
		device_create_file(&intf->dev, &dev_attr_output14);
		device_create_file(&intf->dev, &dev_attr_output15);
		device_create_file(&intf->dev, &dev_attr_output16);
	}

	if (ifkit->inputs >= 4) {
		device_create_file(&intf->dev, &dev_attr_input1);
		device_create_file(&intf->dev, &dev_attr_input2);
		device_create_file(&intf->dev, &dev_attr_input3);
		device_create_file(&intf->dev, &dev_attr_input4);
	}
	if (ifkit->inputs >= 8) {
		device_create_file(&intf->dev, &dev_attr_input5);
		device_create_file(&intf->dev, &dev_attr_input6);
		device_create_file(&intf->dev, &dev_attr_input7);
		device_create_file(&intf->dev, &dev_attr_input8);
	}
	if (ifkit->inputs == 16) {
		device_create_file(&intf->dev, &dev_attr_input9);
		device_create_file(&intf->dev, &dev_attr_input10);
		device_create_file(&intf->dev, &dev_attr_input11);
		device_create_file(&intf->dev, &dev_attr_input12);
		device_create_file(&intf->dev, &dev_attr_input13);
		device_create_file(&intf->dev, &dev_attr_input14);
		device_create_file(&intf->dev, &dev_attr_input15);
		device_create_file(&intf->dev, &dev_attr_input16);
	}

	if (ifkit->sensors >= 4) {
		device_create_file(&intf->dev, &dev_attr_sensor1);
		device_create_file(&intf->dev, &dev_attr_sensor2);
		device_create_file(&intf->dev, &dev_attr_sensor3);
		device_create_file(&intf->dev, &dev_attr_sensor4);
	}
	if (ifkit->sensors >= 7) {
		device_create_file(&intf->dev, &dev_attr_sensor5);
		device_create_file(&intf->dev, &dev_attr_sensor6);
		device_create_file(&intf->dev, &dev_attr_sensor7);
	}
	if (ifkit->sensors == 8)
		device_create_file(&intf->dev, &dev_attr_sensor8);

	if (ifkit->has_lcd)
		device_create_file(&intf->dev, &dev_attr_lcd);

	dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
			ifkit->sensors, ifkit->inputs, ifkit->outputs);

	return 0;

out:
	if (kit) {
		if (kit->irq)
			usb_free_urb(kit->irq);
		if (kit->data)
			usb_buffer_free(dev, URB_INT_SIZE, kit->data, kit->data_dma);
		kfree(kit);
	}

	return rc;
}

static void interfacekit_disconnect(struct usb_interface *interface)
{
	struct interfacekit *kit;

	kit = usb_get_intfdata(interface);
	usb_set_intfdata(interface, NULL);
	if (!kit)
		return;

	usb_kill_urb(kit->irq);
	usb_free_urb(kit->irq);
	usb_buffer_free(kit->udev, URB_INT_SIZE, kit->data, kit->data_dma);

	cancel_delayed_work(&kit->do_notify);

	if (kit->ifkit->outputs >= 4) {
		device_remove_file(&interface->dev, &dev_attr_output1);
		device_remove_file(&interface->dev, &dev_attr_output2);
		device_remove_file(&interface->dev, &dev_attr_output3);
		device_remove_file(&interface->dev, &dev_attr_output4);
	}
	if (kit->ifkit->outputs >= 8) {
		device_remove_file(&interface->dev, &dev_attr_output5);
		device_remove_file(&interface->dev, &dev_attr_output6);
		device_remove_file(&interface->dev, &dev_attr_output7);
		device_remove_file(&interface->dev, &dev_attr_output8);
	}
	if (kit->ifkit->outputs == 16) {
		device_remove_file(&interface->dev, &dev_attr_output9);
		device_remove_file(&interface->dev, &dev_attr_output10);
		device_remove_file(&interface->dev, &dev_attr_output11);
		device_remove_file(&interface->dev, &dev_attr_output12);
		device_remove_file(&interface->dev, &dev_attr_output13);
		device_remove_file(&interface->dev, &dev_attr_output14);
		device_remove_file(&interface->dev, &dev_attr_output15);
		device_remove_file(&interface->dev, &dev_attr_output16);
	}

	if (kit->ifkit->inputs >= 4) {
		device_remove_file(&interface->dev, &dev_attr_input1);
		device_remove_file(&interface->dev, &dev_attr_input2);
		device_remove_file(&interface->dev, &dev_attr_input3);
		device_remove_file(&interface->dev, &dev_attr_input4);
	}
	if (kit->ifkit->inputs >= 8) {
		device_remove_file(&interface->dev, &dev_attr_input5);
		device_remove_file(&interface->dev, &dev_attr_input6);
		device_remove_file(&interface->dev, &dev_attr_input7);
		device_remove_file(&interface->dev, &dev_attr_input8);
	}
	if (kit->ifkit->inputs == 16) {
		device_remove_file(&interface->dev, &dev_attr_input9);
		device_remove_file(&interface->dev, &dev_attr_input10);
		device_remove_file(&interface->dev, &dev_attr_input11);
		device_remove_file(&interface->dev, &dev_attr_input12);
		device_remove_file(&interface->dev, &dev_attr_input13);
		device_remove_file(&interface->dev, &dev_attr_input14);
		device_remove_file(&interface->dev, &dev_attr_input15);
		device_remove_file(&interface->dev, &dev_attr_input16);
	}

	if (kit->ifkit->sensors >= 4) {
		device_remove_file(&interface->dev, &dev_attr_sensor1);
		device_remove_file(&interface->dev, &dev_attr_sensor2);
		device_remove_file(&interface->dev, &dev_attr_sensor3);
		device_remove_file(&interface->dev, &dev_attr_sensor4);
	}
	if (kit->ifkit->sensors >= 7) {
		device_remove_file(&interface->dev, &dev_attr_sensor5);
		device_remove_file(&interface->dev, &dev_attr_sensor6);
		device_remove_file(&interface->dev, &dev_attr_sensor7);
	}
	if (kit->ifkit->sensors == 8)
		device_remove_file(&interface->dev, &dev_attr_sensor8);

	if (kit->ifkit->has_lcd)
		device_remove_file(&interface->dev, &dev_attr_lcd);

	dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
		kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);

	usb_put_dev(kit->udev);
	kfree(kit);
}

static struct usb_driver interfacekit_driver = {
	.name = "phidgetkit",
	.probe = interfacekit_probe,
	.disconnect = interfacekit_disconnect,
	.id_table = id_table
};

static int __init interfacekit_init(void)
{
	int retval = 0;

	retval = usb_register(&interfacekit_driver);
	if (retval)
		err("usb_register failed. Error number %d", retval);

	return retval;
}

static void __exit interfacekit_exit(void)
{
	usb_deregister(&interfacekit_driver);
}

module_init(interfacekit_init);
module_exit(interfacekit_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");