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[karo-tx-linux.git] / drivers / input / tablet / wacom_sys.c
1 /*
2  * drivers/input/tablet/wacom_sys.c
3  *
4  *  USB Wacom tablet support - system specific code
5  */
6
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
14 #include "wacom_wac.h"
15 #include "wacom.h"
16
17 /* defines to get HID report descriptor */
18 #define HID_DEVICET_HID         (USB_TYPE_CLASS | 0x01)
19 #define HID_DEVICET_REPORT      (USB_TYPE_CLASS | 0x02)
20 #define HID_USAGE_UNDEFINED             0x00
21 #define HID_USAGE_PAGE                  0x05
22 #define HID_USAGE_PAGE_DIGITIZER        0x0d
23 #define HID_USAGE_PAGE_DESKTOP          0x01
24 #define HID_USAGE                       0x09
25 #define HID_USAGE_X                     0x30
26 #define HID_USAGE_Y                     0x31
27 #define HID_USAGE_X_TILT                0x3d
28 #define HID_USAGE_Y_TILT                0x3e
29 #define HID_USAGE_FINGER                0x22
30 #define HID_USAGE_STYLUS                0x20
31 #define HID_USAGE_CONTACTMAX            0x55
32 #define HID_COLLECTION                  0xa1
33 #define HID_COLLECTION_LOGICAL          0x02
34 #define HID_COLLECTION_END              0xc0
35
36 enum {
37         WCM_UNDEFINED = 0,
38         WCM_DESKTOP,
39         WCM_DIGITIZER,
40 };
41
42 struct hid_descriptor {
43         struct usb_descriptor_header header;
44         __le16   bcdHID;
45         u8       bCountryCode;
46         u8       bNumDescriptors;
47         u8       bDescriptorType;
48         __le16   wDescriptorLength;
49 } __attribute__ ((packed));
50
51 /* defines to get/set USB message */
52 #define USB_REQ_GET_REPORT      0x01
53 #define USB_REQ_SET_REPORT      0x09
54
55 #define WAC_HID_FEATURE_REPORT  0x03
56 #define WAC_MSG_RETRIES         5
57
58 #define WAC_CMD_LED_CONTROL     0x20
59 #define WAC_CMD_ICON_START      0x21
60 #define WAC_CMD_ICON_XFER       0x23
61 #define WAC_CMD_RETRIES         10
62
63 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
64                             void *buf, size_t size, unsigned int retries)
65 {
66         struct usb_device *dev = interface_to_usbdev(intf);
67         int retval;
68
69         do {
70                 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
71                                 USB_REQ_GET_REPORT,
72                                 USB_DIR_IN | USB_TYPE_CLASS |
73                                 USB_RECIP_INTERFACE,
74                                 (type << 8) + id,
75                                 intf->altsetting[0].desc.bInterfaceNumber,
76                                 buf, size, 100);
77         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
78
79         return retval;
80 }
81
82 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
83                             void *buf, size_t size, unsigned int retries)
84 {
85         struct usb_device *dev = interface_to_usbdev(intf);
86         int retval;
87
88         do {
89                 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
90                                 USB_REQ_SET_REPORT,
91                                 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
92                                 (type << 8) + id,
93                                 intf->altsetting[0].desc.bInterfaceNumber,
94                                 buf, size, 1000);
95         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
96
97         return retval;
98 }
99
100 static void wacom_sys_irq(struct urb *urb)
101 {
102         struct wacom *wacom = urb->context;
103         struct device *dev = &wacom->intf->dev;
104         int retval;
105
106         switch (urb->status) {
107         case 0:
108                 /* success */
109                 break;
110         case -ECONNRESET:
111         case -ENOENT:
112         case -ESHUTDOWN:
113                 /* this urb is terminated, clean up */
114                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
115                         __func__, urb->status);
116                 return;
117         default:
118                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
119                         __func__, urb->status);
120                 goto exit;
121         }
122
123         wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
124
125  exit:
126         usb_mark_last_busy(wacom->usbdev);
127         retval = usb_submit_urb(urb, GFP_ATOMIC);
128         if (retval)
129                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
130                         __func__, retval);
131 }
132
133 static int wacom_open(struct input_dev *dev)
134 {
135         struct wacom *wacom = input_get_drvdata(dev);
136         int retval = 0;
137
138         if (usb_autopm_get_interface(wacom->intf) < 0)
139                 return -EIO;
140
141         mutex_lock(&wacom->lock);
142
143         if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
144                 retval = -EIO;
145                 goto out;
146         }
147
148         wacom->open = true;
149         wacom->intf->needs_remote_wakeup = 1;
150
151 out:
152         mutex_unlock(&wacom->lock);
153         usb_autopm_put_interface(wacom->intf);
154         return retval;
155 }
156
157 static void wacom_close(struct input_dev *dev)
158 {
159         struct wacom *wacom = input_get_drvdata(dev);
160         int autopm_error;
161
162         autopm_error = usb_autopm_get_interface(wacom->intf);
163
164         mutex_lock(&wacom->lock);
165         usb_kill_urb(wacom->irq);
166         wacom->open = false;
167         wacom->intf->needs_remote_wakeup = 0;
168         mutex_unlock(&wacom->lock);
169
170         if (!autopm_error)
171                 usb_autopm_put_interface(wacom->intf);
172 }
173
174 /*
175  * Calculate the resolution of the X or Y axis, given appropriate HID data.
176  * This function is little more than hidinput_calc_abs_res stripped down.
177  */
178 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
179                               unsigned char unit, unsigned char exponent)
180 {
181         int prev, unit_exponent;
182
183         /* Check if the extents are sane */
184         if (logical_extents <= 0 || physical_extents <= 0)
185                 return 0;
186
187         /* Get signed value of nybble-sized twos-compliment exponent */
188         unit_exponent = exponent;
189         if (unit_exponent > 7)
190                 unit_exponent -= 16;
191
192         /* Convert physical_extents to millimeters */
193         if (unit == 0x11) {             /* If centimeters */
194                 unit_exponent += 1;
195         } else if (unit == 0x13) {      /* If inches */
196                 prev = physical_extents;
197                 physical_extents *= 254;
198                 if (physical_extents < prev)
199                         return 0;
200                 unit_exponent -= 1;
201         } else {
202                 return 0;
203         }
204
205         /* Apply negative unit exponent */
206         for (; unit_exponent < 0; unit_exponent++) {
207                 prev = logical_extents;
208                 logical_extents *= 10;
209                 if (logical_extents < prev)
210                         return 0;
211         }
212         /* Apply positive unit exponent */
213         for (; unit_exponent > 0; unit_exponent--) {
214                 prev = physical_extents;
215                 physical_extents *= 10;
216                 if (physical_extents < prev)
217                         return 0;
218         }
219
220         /* Calculate resolution */
221         return logical_extents / physical_extents;
222 }
223
224 static int wacom_parse_logical_collection(unsigned char *report,
225                                           struct wacom_features *features)
226 {
227         int length = 0;
228
229         if (features->type == BAMBOO_PT) {
230
231                 /* Logical collection is only used by 3rd gen Bamboo Touch */
232                 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
233                 features->device_type = BTN_TOOL_FINGER;
234
235                 features->x_max = features->y_max =
236                         get_unaligned_le16(&report[10]);
237
238                 length = 11;
239         }
240         return length;
241 }
242
243 static void wacom_retrieve_report_data(struct usb_interface *intf,
244                                        struct wacom_features *features)
245 {
246         int result = 0;
247         unsigned char *rep_data;
248
249         rep_data = kmalloc(2, GFP_KERNEL);
250         if (rep_data) {
251
252                 rep_data[0] = 12;
253                 result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
254                                           rep_data[0], rep_data, 2,
255                                           WAC_MSG_RETRIES);
256
257                 if (result >= 0 && rep_data[1] > 2)
258                         features->touch_max = rep_data[1];
259
260                 kfree(rep_data);
261         }
262 }
263
264 /*
265  * Interface Descriptor of wacom devices can be incomplete and
266  * inconsistent so wacom_features table is used to store stylus
267  * device's packet lengths, various maximum values, and tablet
268  * resolution based on product ID's.
269  *
270  * For devices that contain 2 interfaces, wacom_features table is
271  * inaccurate for the touch interface.  Since the Interface Descriptor
272  * for touch interfaces has pretty complete data, this function exists
273  * to query tablet for this missing information instead of hard coding in
274  * an additional table.
275  *
276  * A typical Interface Descriptor for a stylus will contain a
277  * boot mouse application collection that is not of interest and this
278  * function will ignore it.
279  *
280  * It also contains a digitizer application collection that also is not
281  * of interest since any information it contains would be duplicate
282  * of what is in wacom_features. Usually it defines a report of an array
283  * of bytes that could be used as max length of the stylus packet returned.
284  * If it happens to define a Digitizer-Stylus Physical Collection then
285  * the X and Y logical values contain valid data but it is ignored.
286  *
287  * A typical Interface Descriptor for a touch interface will contain a
288  * Digitizer-Finger Physical Collection which will define both logical
289  * X/Y maximum as well as the physical size of tablet. Since touch
290  * interfaces haven't supported pressure or distance, this is enough
291  * information to override invalid values in the wacom_features table.
292  *
293  * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
294  * Collection. Instead they define a Logical Collection with a single
295  * Logical Maximum for both X and Y.
296  *
297  * Intuos5 touch interface does not contain useful data. We deal with
298  * this after returning from this function.
299  */
300 static int wacom_parse_hid(struct usb_interface *intf,
301                            struct hid_descriptor *hid_desc,
302                            struct wacom_features *features)
303 {
304         struct usb_device *dev = interface_to_usbdev(intf);
305         char limit = 0;
306         /* result has to be defined as int for some devices */
307         int result = 0;
308         int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
309         unsigned char *report;
310
311         report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
312         if (!report)
313                 return -ENOMEM;
314
315         /* retrive report descriptors */
316         do {
317                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
318                         USB_REQ_GET_DESCRIPTOR,
319                         USB_RECIP_INTERFACE | USB_DIR_IN,
320                         HID_DEVICET_REPORT << 8,
321                         intf->altsetting[0].desc.bInterfaceNumber, /* interface */
322                         report,
323                         hid_desc->wDescriptorLength,
324                         5000); /* 5 secs */
325         } while (result < 0 && limit++ < WAC_MSG_RETRIES);
326
327         /* No need to parse the Descriptor. It isn't an error though */
328         if (result < 0)
329                 goto out;
330
331         for (i = 0; i < hid_desc->wDescriptorLength; i++) {
332
333                 switch (report[i]) {
334                 case HID_USAGE_PAGE:
335                         switch (report[i + 1]) {
336                         case HID_USAGE_PAGE_DIGITIZER:
337                                 usage = WCM_DIGITIZER;
338                                 i++;
339                                 break;
340
341                         case HID_USAGE_PAGE_DESKTOP:
342                                 usage = WCM_DESKTOP;
343                                 i++;
344                                 break;
345                         }
346                         break;
347
348                 case HID_USAGE:
349                         switch (report[i + 1]) {
350                         case HID_USAGE_X:
351                                 if (usage == WCM_DESKTOP) {
352                                         if (finger) {
353                                                 features->device_type = BTN_TOOL_FINGER;
354
355                                                 switch (features->type) {
356                                                 case TABLETPC2FG:
357                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
358                                                         break;
359
360                                                 case MTSCREEN:
361                                                 case WACOM_24HDT:
362                                                         features->pktlen = WACOM_PKGLEN_MTOUCH;
363                                                         break;
364
365                                                 case MTTPC:
366                                                         features->pktlen = WACOM_PKGLEN_MTTPC;
367                                                         break;
368
369                                                 case BAMBOO_PT:
370                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
371                                                         break;
372
373                                                 default:
374                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
375                                                         break;
376                                                 }
377
378                                                 switch (features->type) {
379                                                 case BAMBOO_PT:
380                                                         features->x_phy =
381                                                                 get_unaligned_le16(&report[i + 5]);
382                                                         features->x_max =
383                                                                 get_unaligned_le16(&report[i + 8]);
384                                                         i += 15;
385                                                         break;
386
387                                                 case WACOM_24HDT:
388                                                         features->x_max =
389                                                                 get_unaligned_le16(&report[i + 3]);
390                                                         features->x_phy =
391                                                                 get_unaligned_le16(&report[i + 8]);
392                                                         features->unit = report[i - 1];
393                                                         features->unitExpo = report[i - 3];
394                                                         i += 12;
395                                                         break;
396
397                                                 default:
398                                                         features->x_max =
399                                                                 get_unaligned_le16(&report[i + 3]);
400                                                         features->x_phy =
401                                                                 get_unaligned_le16(&report[i + 6]);
402                                                         features->unit = report[i + 9];
403                                                         features->unitExpo = report[i + 11];
404                                                         i += 12;
405                                                         break;
406                                                 }
407                                         } else if (pen) {
408                                                 /* penabled only accepts exact bytes of data */
409                                                 if (features->type >= TABLETPC)
410                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
411                                                 features->device_type = BTN_TOOL_PEN;
412                                                 features->x_max =
413                                                         get_unaligned_le16(&report[i + 3]);
414                                                 i += 4;
415                                         }
416                                 }
417                                 break;
418
419                         case HID_USAGE_Y:
420                                 if (usage == WCM_DESKTOP) {
421                                         if (finger) {
422                                                 switch (features->type) {
423                                                 case TABLETPC2FG:
424                                                 case MTSCREEN:
425                                                 case MTTPC:
426                                                         features->y_max =
427                                                                 get_unaligned_le16(&report[i + 3]);
428                                                         features->y_phy =
429                                                                 get_unaligned_le16(&report[i + 6]);
430                                                         i += 7;
431                                                         break;
432
433                                                 case WACOM_24HDT:
434                                                         features->y_max =
435                                                                 get_unaligned_le16(&report[i + 3]);
436                                                         features->y_phy =
437                                                                 get_unaligned_le16(&report[i - 2]);
438                                                         i += 7;
439                                                         break;
440
441                                                 case BAMBOO_PT:
442                                                         features->y_phy =
443                                                                 get_unaligned_le16(&report[i + 3]);
444                                                         features->y_max =
445                                                                 get_unaligned_le16(&report[i + 6]);
446                                                         i += 12;
447                                                         break;
448
449                                                 default:
450                                                         features->y_max =
451                                                                 features->x_max;
452                                                         features->y_phy =
453                                                                 get_unaligned_le16(&report[i + 3]);
454                                                         i += 4;
455                                                         break;
456                                                 }
457                                         } else if (pen) {
458                                                 features->y_max =
459                                                         get_unaligned_le16(&report[i + 3]);
460                                                 i += 4;
461                                         }
462                                 }
463                                 break;
464
465                         case HID_USAGE_FINGER:
466                                 finger = 1;
467                                 i++;
468                                 break;
469
470                         /*
471                          * Requiring Stylus Usage will ignore boot mouse
472                          * X/Y values and some cases of invalid Digitizer X/Y
473                          * values commonly reported.
474                          */
475                         case HID_USAGE_STYLUS:
476                                 pen = 1;
477                                 i++;
478                                 break;
479
480                         case HID_USAGE_CONTACTMAX:
481                                 /* leave touch_max as is if predefined */
482                                 if (!features->touch_max)
483                                         wacom_retrieve_report_data(intf, features);
484                                 i++;
485                                 break;
486                         }
487                         break;
488
489                 case HID_COLLECTION_END:
490                         /* reset UsagePage and Finger */
491                         finger = usage = 0;
492                         break;
493
494                 case HID_COLLECTION:
495                         i++;
496                         switch (report[i]) {
497                         case HID_COLLECTION_LOGICAL:
498                                 i += wacom_parse_logical_collection(&report[i],
499                                                                     features);
500                                 break;
501                         }
502                         break;
503                 }
504         }
505
506  out:
507         result = 0;
508         kfree(report);
509         return result;
510 }
511
512 static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
513 {
514         unsigned char *rep_data;
515         int error = -ENOMEM, limit = 0;
516
517         rep_data = kzalloc(length, GFP_KERNEL);
518         if (!rep_data)
519                 return error;
520
521         do {
522                 rep_data[0] = report_id;
523                 rep_data[1] = mode;
524
525                 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
526                                          report_id, rep_data, length, 1);
527                 if (error >= 0)
528                         error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
529                                                  report_id, rep_data, length, 1);
530         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
531
532         kfree(rep_data);
533
534         return error < 0 ? error : 0;
535 }
536
537 /*
538  * Switch the tablet into its most-capable mode. Wacom tablets are
539  * typically configured to power-up in a mode which sends mouse-like
540  * reports to the OS. To get absolute position, pressure data, etc.
541  * from the tablet, it is necessary to switch the tablet out of this
542  * mode and into one which sends the full range of tablet data.
543  */
544 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
545 {
546         if (features->device_type == BTN_TOOL_FINGER) {
547                 if (features->type > TABLETPC) {
548                         /* MT Tablet PC touch */
549                         return wacom_set_device_mode(intf, 3, 4, 4);
550                 }
551                 else if (features->type == WACOM_24HDT) {
552                         return wacom_set_device_mode(intf, 18, 3, 2);
553                 }
554         } else if (features->device_type == BTN_TOOL_PEN) {
555                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
556                         return wacom_set_device_mode(intf, 2, 2, 2);
557                 }
558         }
559
560         return 0;
561 }
562
563 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
564                                          struct wacom_features *features)
565 {
566         int error = 0;
567         struct usb_host_interface *interface = intf->cur_altsetting;
568         struct hid_descriptor *hid_desc;
569
570         /* default features */
571         features->device_type = BTN_TOOL_PEN;
572         features->x_fuzz = 4;
573         features->y_fuzz = 4;
574         features->pressure_fuzz = 0;
575         features->distance_fuzz = 0;
576
577         /*
578          * The wireless device HID is basic and layout conflicts with
579          * other tablets (monitor and touch interface can look like pen).
580          * Skip the query for this type and modify defaults based on
581          * interface number.
582          */
583         if (features->type == WIRELESS) {
584                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
585                         features->device_type = 0;
586                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
587                         features->device_type = BTN_TOOL_FINGER;
588                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
589                 }
590         }
591
592         /* only devices that support touch need to retrieve the info */
593         if (features->type < BAMBOO_PT) {
594                 goto out;
595         }
596
597         error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
598         if (error) {
599                 error = usb_get_extra_descriptor(&interface->endpoint[0],
600                                                  HID_DEVICET_REPORT, &hid_desc);
601                 if (error) {
602                         dev_err(&intf->dev,
603                                 "can not retrieve extra class descriptor\n");
604                         goto out;
605                 }
606         }
607         error = wacom_parse_hid(intf, hid_desc, features);
608
609  out:
610         return error;
611 }
612
613 struct wacom_usbdev_data {
614         struct list_head list;
615         struct kref kref;
616         struct usb_device *dev;
617         struct wacom_shared shared;
618 };
619
620 static LIST_HEAD(wacom_udev_list);
621 static DEFINE_MUTEX(wacom_udev_list_lock);
622
623 static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
624 {
625         int port1;
626         struct usb_device *sibling;
627
628         if (vendor == 0 && product == 0)
629                 return dev;
630
631         if (dev->parent == NULL)
632                 return NULL;
633
634         usb_hub_for_each_child(dev->parent, port1, sibling) {
635                 struct usb_device_descriptor *d;
636                 if (sibling == NULL)
637                         continue;
638
639                 d = &sibling->descriptor;
640                 if (d->idVendor == vendor && d->idProduct == product)
641                         return sibling;
642         }
643
644         return NULL;
645 }
646
647 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
648 {
649         struct wacom_usbdev_data *data;
650
651         list_for_each_entry(data, &wacom_udev_list, list) {
652                 if (data->dev == dev) {
653                         kref_get(&data->kref);
654                         return data;
655                 }
656         }
657
658         return NULL;
659 }
660
661 static int wacom_add_shared_data(struct wacom_wac *wacom,
662                                  struct usb_device *dev)
663 {
664         struct wacom_usbdev_data *data;
665         int retval = 0;
666
667         mutex_lock(&wacom_udev_list_lock);
668
669         data = wacom_get_usbdev_data(dev);
670         if (!data) {
671                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
672                 if (!data) {
673                         retval = -ENOMEM;
674                         goto out;
675                 }
676
677                 kref_init(&data->kref);
678                 data->dev = dev;
679                 list_add_tail(&data->list, &wacom_udev_list);
680         }
681
682         wacom->shared = &data->shared;
683
684 out:
685         mutex_unlock(&wacom_udev_list_lock);
686         return retval;
687 }
688
689 static void wacom_release_shared_data(struct kref *kref)
690 {
691         struct wacom_usbdev_data *data =
692                 container_of(kref, struct wacom_usbdev_data, kref);
693
694         mutex_lock(&wacom_udev_list_lock);
695         list_del(&data->list);
696         mutex_unlock(&wacom_udev_list_lock);
697
698         kfree(data);
699 }
700
701 static void wacom_remove_shared_data(struct wacom_wac *wacom)
702 {
703         struct wacom_usbdev_data *data;
704
705         if (wacom->shared) {
706                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
707                 kref_put(&data->kref, wacom_release_shared_data);
708                 wacom->shared = NULL;
709         }
710 }
711
712 static int wacom_led_control(struct wacom *wacom)
713 {
714         unsigned char *buf;
715         int retval;
716
717         buf = kzalloc(9, GFP_KERNEL);
718         if (!buf)
719                 return -ENOMEM;
720
721         if (wacom->wacom_wac.features.type >= INTUOS5S &&
722             wacom->wacom_wac.features.type <= INTUOS5L) {
723                 /*
724                  * Touch Ring and crop mark LED luminance may take on
725                  * one of four values:
726                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
727                  */
728                 int ring_led = wacom->led.select[0] & 0x03;
729                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
730                 int crop_lum = 0;
731
732                 buf[0] = WAC_CMD_LED_CONTROL;
733                 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
734         }
735         else {
736                 int led = wacom->led.select[0] | 0x4;
737
738                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
739                     wacom->wacom_wac.features.type == WACOM_24HD)
740                         led |= (wacom->led.select[1] << 4) | 0x40;
741
742                 buf[0] = WAC_CMD_LED_CONTROL;
743                 buf[1] = led;
744                 buf[2] = wacom->led.llv;
745                 buf[3] = wacom->led.hlv;
746                 buf[4] = wacom->led.img_lum;
747         }
748
749         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
750                                   buf, 9, WAC_CMD_RETRIES);
751         kfree(buf);
752
753         return retval;
754 }
755
756 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
757 {
758         unsigned char *buf;
759         int i, retval;
760
761         buf = kzalloc(259, GFP_KERNEL);
762         if (!buf)
763                 return -ENOMEM;
764
765         /* Send 'start' command */
766         buf[0] = WAC_CMD_ICON_START;
767         buf[1] = 1;
768         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
769                                   buf, 2, WAC_CMD_RETRIES);
770         if (retval < 0)
771                 goto out;
772
773         buf[0] = WAC_CMD_ICON_XFER;
774         buf[1] = button_id & 0x07;
775         for (i = 0; i < 4; i++) {
776                 buf[2] = i;
777                 memcpy(buf + 3, img + i * 256, 256);
778
779                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
780                                           buf, 259, WAC_CMD_RETRIES);
781                 if (retval < 0)
782                         break;
783         }
784
785         /* Send 'stop' */
786         buf[0] = WAC_CMD_ICON_START;
787         buf[1] = 0;
788         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
789                          buf, 2, WAC_CMD_RETRIES);
790
791 out:
792         kfree(buf);
793         return retval;
794 }
795
796 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
797                                       const char *buf, size_t count)
798 {
799         struct wacom *wacom = dev_get_drvdata(dev);
800         unsigned int id;
801         int err;
802
803         err = kstrtouint(buf, 10, &id);
804         if (err)
805                 return err;
806
807         mutex_lock(&wacom->lock);
808
809         wacom->led.select[set_id] = id & 0x3;
810         err = wacom_led_control(wacom);
811
812         mutex_unlock(&wacom->lock);
813
814         return err < 0 ? err : count;
815 }
816
817 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
818 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
819         struct device_attribute *attr, const char *buf, size_t count)   \
820 {                                                                       \
821         return wacom_led_select_store(dev, SET_ID, buf, count);         \
822 }                                                                       \
823 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
824         struct device_attribute *attr, char *buf)                       \
825 {                                                                       \
826         struct wacom *wacom = dev_get_drvdata(dev);                     \
827         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
828 }                                                                       \
829 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
830                     wacom_led##SET_ID##_select_show,                    \
831                     wacom_led##SET_ID##_select_store)
832
833 DEVICE_LED_SELECT_ATTR(0);
834 DEVICE_LED_SELECT_ATTR(1);
835
836 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
837                                      const char *buf, size_t count)
838 {
839         unsigned int value;
840         int err;
841
842         err = kstrtouint(buf, 10, &value);
843         if (err)
844                 return err;
845
846         mutex_lock(&wacom->lock);
847
848         *dest = value & 0x7f;
849         err = wacom_led_control(wacom);
850
851         mutex_unlock(&wacom->lock);
852
853         return err < 0 ? err : count;
854 }
855
856 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
857 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
858         struct device_attribute *attr, const char *buf, size_t count)   \
859 {                                                                       \
860         struct wacom *wacom = dev_get_drvdata(dev);                     \
861                                                                         \
862         return wacom_luminance_store(wacom, &wacom->led.field,          \
863                                      buf, count);                       \
864 }                                                                       \
865 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
866                    NULL, wacom_##name##_luminance_store)
867
868 DEVICE_LUMINANCE_ATTR(status0, llv);
869 DEVICE_LUMINANCE_ATTR(status1, hlv);
870 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
871
872 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
873                                         const char *buf, size_t count)
874 {
875         struct wacom *wacom = dev_get_drvdata(dev);
876         int err;
877
878         if (count != 1024)
879                 return -EINVAL;
880
881         mutex_lock(&wacom->lock);
882
883         err = wacom_led_putimage(wacom, button_id, buf);
884
885         mutex_unlock(&wacom->lock);
886
887         return err < 0 ? err : count;
888 }
889
890 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
891 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
892         struct device_attribute *attr, const char *buf, size_t count)   \
893 {                                                                       \
894         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
895 }                                                                       \
896 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
897                    NULL, wacom_btnimg##BUTTON_ID##_store)
898
899 DEVICE_BTNIMG_ATTR(0);
900 DEVICE_BTNIMG_ATTR(1);
901 DEVICE_BTNIMG_ATTR(2);
902 DEVICE_BTNIMG_ATTR(3);
903 DEVICE_BTNIMG_ATTR(4);
904 DEVICE_BTNIMG_ATTR(5);
905 DEVICE_BTNIMG_ATTR(6);
906 DEVICE_BTNIMG_ATTR(7);
907
908 static struct attribute *cintiq_led_attrs[] = {
909         &dev_attr_status_led0_select.attr,
910         &dev_attr_status_led1_select.attr,
911         NULL
912 };
913
914 static struct attribute_group cintiq_led_attr_group = {
915         .name = "wacom_led",
916         .attrs = cintiq_led_attrs,
917 };
918
919 static struct attribute *intuos4_led_attrs[] = {
920         &dev_attr_status0_luminance.attr,
921         &dev_attr_status1_luminance.attr,
922         &dev_attr_status_led0_select.attr,
923         &dev_attr_buttons_luminance.attr,
924         &dev_attr_button0_rawimg.attr,
925         &dev_attr_button1_rawimg.attr,
926         &dev_attr_button2_rawimg.attr,
927         &dev_attr_button3_rawimg.attr,
928         &dev_attr_button4_rawimg.attr,
929         &dev_attr_button5_rawimg.attr,
930         &dev_attr_button6_rawimg.attr,
931         &dev_attr_button7_rawimg.attr,
932         NULL
933 };
934
935 static struct attribute_group intuos4_led_attr_group = {
936         .name = "wacom_led",
937         .attrs = intuos4_led_attrs,
938 };
939
940 static struct attribute *intuos5_led_attrs[] = {
941         &dev_attr_status0_luminance.attr,
942         &dev_attr_status_led0_select.attr,
943         NULL
944 };
945
946 static struct attribute_group intuos5_led_attr_group = {
947         .name = "wacom_led",
948         .attrs = intuos5_led_attrs,
949 };
950
951 static int wacom_initialize_leds(struct wacom *wacom)
952 {
953         int error;
954
955         /* Initialize default values */
956         switch (wacom->wacom_wac.features.type) {
957         case INTUOS4S:
958         case INTUOS4:
959         case INTUOS4L:
960                 wacom->led.select[0] = 0;
961                 wacom->led.select[1] = 0;
962                 wacom->led.llv = 10;
963                 wacom->led.hlv = 20;
964                 wacom->led.img_lum = 10;
965                 error = sysfs_create_group(&wacom->intf->dev.kobj,
966                                            &intuos4_led_attr_group);
967                 break;
968
969         case WACOM_24HD:
970         case WACOM_21UX2:
971                 wacom->led.select[0] = 0;
972                 wacom->led.select[1] = 0;
973                 wacom->led.llv = 0;
974                 wacom->led.hlv = 0;
975                 wacom->led.img_lum = 0;
976
977                 error = sysfs_create_group(&wacom->intf->dev.kobj,
978                                            &cintiq_led_attr_group);
979                 break;
980
981         case INTUOS5S:
982         case INTUOS5:
983         case INTUOS5L:
984                 wacom->led.select[0] = 0;
985                 wacom->led.select[1] = 0;
986                 wacom->led.llv = 32;
987                 wacom->led.hlv = 0;
988                 wacom->led.img_lum = 0;
989
990                 error = sysfs_create_group(&wacom->intf->dev.kobj,
991                                            &intuos5_led_attr_group);
992                 break;
993
994         default:
995                 return 0;
996         }
997
998         if (error) {
999                 dev_err(&wacom->intf->dev,
1000                         "cannot create sysfs group err: %d\n", error);
1001                 return error;
1002         }
1003         wacom_led_control(wacom);
1004
1005         return 0;
1006 }
1007
1008 static void wacom_destroy_leds(struct wacom *wacom)
1009 {
1010         switch (wacom->wacom_wac.features.type) {
1011         case INTUOS4S:
1012         case INTUOS4:
1013         case INTUOS4L:
1014                 sysfs_remove_group(&wacom->intf->dev.kobj,
1015                                    &intuos4_led_attr_group);
1016                 break;
1017
1018         case WACOM_24HD:
1019         case WACOM_21UX2:
1020                 sysfs_remove_group(&wacom->intf->dev.kobj,
1021                                    &cintiq_led_attr_group);
1022                 break;
1023
1024         case INTUOS5S:
1025         case INTUOS5:
1026         case INTUOS5L:
1027                 sysfs_remove_group(&wacom->intf->dev.kobj,
1028                                    &intuos5_led_attr_group);
1029                 break;
1030         }
1031 }
1032
1033 static enum power_supply_property wacom_battery_props[] = {
1034         POWER_SUPPLY_PROP_CAPACITY
1035 };
1036
1037 static int wacom_battery_get_property(struct power_supply *psy,
1038                                       enum power_supply_property psp,
1039                                       union power_supply_propval *val)
1040 {
1041         struct wacom *wacom = container_of(psy, struct wacom, battery);
1042         int ret = 0;
1043
1044         switch (psp) {
1045                 case POWER_SUPPLY_PROP_CAPACITY:
1046                         val->intval =
1047                                 wacom->wacom_wac.battery_capacity * 100 / 31;
1048                         break;
1049                 default:
1050                         ret = -EINVAL;
1051                         break;
1052         }
1053
1054         return ret;
1055 }
1056
1057 static int wacom_initialize_battery(struct wacom *wacom)
1058 {
1059         int error = 0;
1060
1061         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1062                 wacom->battery.properties = wacom_battery_props;
1063                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1064                 wacom->battery.get_property = wacom_battery_get_property;
1065                 wacom->battery.name = "wacom_battery";
1066                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1067                 wacom->battery.use_for_apm = 0;
1068
1069                 error = power_supply_register(&wacom->usbdev->dev,
1070                                               &wacom->battery);
1071
1072                 if (!error)
1073                         power_supply_powers(&wacom->battery,
1074                                             &wacom->usbdev->dev);
1075         }
1076
1077         return error;
1078 }
1079
1080 static void wacom_destroy_battery(struct wacom *wacom)
1081 {
1082         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1083             wacom->battery.dev) {
1084                 power_supply_unregister(&wacom->battery);
1085                 wacom->battery.dev = NULL;
1086         }
1087 }
1088
1089 static int wacom_register_input(struct wacom *wacom)
1090 {
1091         struct input_dev *input_dev;
1092         struct usb_interface *intf = wacom->intf;
1093         struct usb_device *dev = interface_to_usbdev(intf);
1094         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1095         int error;
1096
1097         input_dev = input_allocate_device();
1098         if (!input_dev) {
1099                 error = -ENOMEM;
1100                 goto fail1;
1101         }
1102
1103         input_dev->name = wacom_wac->name;
1104         input_dev->dev.parent = &intf->dev;
1105         input_dev->open = wacom_open;
1106         input_dev->close = wacom_close;
1107         usb_to_input_id(dev, &input_dev->id);
1108         input_set_drvdata(input_dev, wacom);
1109
1110         wacom_wac->input = input_dev;
1111         error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1112         if (error)
1113                 goto fail1;
1114
1115         error = input_register_device(input_dev);
1116         if (error)
1117                 goto fail2;
1118
1119         return 0;
1120
1121 fail2:
1122         input_free_device(input_dev);
1123         wacom_wac->input = NULL;
1124 fail1:
1125         return error;
1126 }
1127
1128 static void wacom_wireless_work(struct work_struct *work)
1129 {
1130         struct wacom *wacom = container_of(work, struct wacom, work);
1131         struct usb_device *usbdev = wacom->usbdev;
1132         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1133         struct wacom *wacom1, *wacom2;
1134         struct wacom_wac *wacom_wac1, *wacom_wac2;
1135         int error;
1136
1137         /*
1138          * Regardless if this is a disconnect or a new tablet,
1139          * remove any existing input and battery devices.
1140          */
1141
1142         wacom_destroy_battery(wacom);
1143
1144         /* Stylus interface */
1145         wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1146         wacom_wac1 = &(wacom1->wacom_wac);
1147         if (wacom_wac1->input)
1148                 input_unregister_device(wacom_wac1->input);
1149         wacom_wac1->input = NULL;
1150
1151         /* Touch interface */
1152         wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1153         wacom_wac2 = &(wacom2->wacom_wac);
1154         if (wacom_wac2->input)
1155                 input_unregister_device(wacom_wac2->input);
1156         wacom_wac2->input = NULL;
1157
1158         if (wacom_wac->pid == 0) {
1159                 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1160         } else {
1161                 const struct usb_device_id *id = wacom_ids;
1162
1163                 dev_info(&wacom->intf->dev,
1164                          "wireless tablet connected with PID %x\n",
1165                          wacom_wac->pid);
1166
1167                 while (id->match_flags) {
1168                         if (id->idVendor == USB_VENDOR_ID_WACOM &&
1169                             id->idProduct == wacom_wac->pid)
1170                                 break;
1171                         id++;
1172                 }
1173
1174                 if (!id->match_flags) {
1175                         dev_info(&wacom->intf->dev,
1176                                  "ignoring unknown PID.\n");
1177                         return;
1178                 }
1179
1180                 /* Stylus interface */
1181                 wacom_wac1->features =
1182                         *((struct wacom_features *)id->driver_info);
1183                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1184                 error = wacom_register_input(wacom1);
1185                 if (error)
1186                         goto fail1;
1187
1188                 /* Touch interface */
1189                 wacom_wac2->features =
1190                         *((struct wacom_features *)id->driver_info);
1191                 wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1192                 wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1193                 wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1194                 error = wacom_register_input(wacom2);
1195                 if (error)
1196                         goto fail2;
1197
1198                 error = wacom_initialize_battery(wacom);
1199                 if (error)
1200                         goto fail3;
1201         }
1202
1203         return;
1204
1205 fail3:
1206         input_unregister_device(wacom_wac2->input);
1207         wacom_wac2->input = NULL;
1208 fail2:
1209         input_unregister_device(wacom_wac1->input);
1210         wacom_wac1->input = NULL;
1211 fail1:
1212         return;
1213 }
1214
1215 /*
1216  * Not all devices report physical dimensions from HID.
1217  * Compute the default from hardcoded logical dimension
1218  * and resolution before driver overwrites them.
1219  */
1220 static void wacom_set_default_phy(struct wacom_features *features)
1221 {
1222         if (features->x_resolution) {
1223                 features->x_phy = (features->x_max * 100) /
1224                                         features->x_resolution;
1225                 features->y_phy = (features->y_max * 100) /
1226                                         features->y_resolution;
1227         }
1228 }
1229
1230 static void wacom_calculate_res(struct wacom_features *features)
1231 {
1232         features->x_resolution = wacom_calc_hid_res(features->x_max,
1233                                                     features->x_phy,
1234                                                     features->unit,
1235                                                     features->unitExpo);
1236         features->y_resolution = wacom_calc_hid_res(features->y_max,
1237                                                     features->y_phy,
1238                                                     features->unit,
1239                                                     features->unitExpo);
1240 }
1241
1242 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1243 {
1244         struct usb_device *dev = interface_to_usbdev(intf);
1245         struct usb_endpoint_descriptor *endpoint;
1246         struct wacom *wacom;
1247         struct wacom_wac *wacom_wac;
1248         struct wacom_features *features;
1249         int error;
1250
1251         if (!id->driver_info)
1252                 return -EINVAL;
1253
1254         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1255         if (!wacom)
1256                 return -ENOMEM;
1257
1258         wacom_wac = &wacom->wacom_wac;
1259         wacom_wac->features = *((struct wacom_features *)id->driver_info);
1260         features = &wacom_wac->features;
1261         if (features->pktlen > WACOM_PKGLEN_MAX) {
1262                 error = -EINVAL;
1263                 goto fail1;
1264         }
1265
1266         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1267                                              GFP_KERNEL, &wacom->data_dma);
1268         if (!wacom_wac->data) {
1269                 error = -ENOMEM;
1270                 goto fail1;
1271         }
1272
1273         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1274         if (!wacom->irq) {
1275                 error = -ENOMEM;
1276                 goto fail2;
1277         }
1278
1279         wacom->usbdev = dev;
1280         wacom->intf = intf;
1281         mutex_init(&wacom->lock);
1282         INIT_WORK(&wacom->work, wacom_wireless_work);
1283         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1284         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1285
1286         endpoint = &intf->cur_altsetting->endpoint[0].desc;
1287
1288         /* set the default size in case we do not get them from hid */
1289         wacom_set_default_phy(features);
1290
1291         /* Retrieve the physical and logical size for touch devices */
1292         error = wacom_retrieve_hid_descriptor(intf, features);
1293         if (error)
1294                 goto fail3;
1295
1296         /*
1297          * Intuos5 has no useful data about its touch interface in its
1298          * HID descriptor. If this is the touch interface (wMaxPacketSize
1299          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1300          */
1301         if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1302                 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1303                         features->device_type = BTN_TOOL_FINGER;
1304                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1305
1306                         features->x_max = 4096;
1307                         features->y_max = 4096;
1308                 } else {
1309                         features->device_type = BTN_TOOL_PEN;
1310                 }
1311         }
1312
1313         wacom_setup_device_quirks(features);
1314
1315         /* set unit to "100th of a mm" for devices not reported by HID */
1316         if (!features->unit) {
1317                 features->unit = 0x11;
1318                 features->unitExpo = 16 - 3;
1319         }
1320         wacom_calculate_res(features);
1321
1322         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1323
1324         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1325                 struct usb_device *other_dev;
1326
1327                 /* Append the device type to the name */
1328                 strlcat(wacom_wac->name,
1329                         features->device_type == BTN_TOOL_PEN ?
1330                                 " Pen" : " Finger",
1331                         sizeof(wacom_wac->name));
1332
1333                 other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
1334                 if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
1335                         other_dev = dev;
1336                 error = wacom_add_shared_data(wacom_wac, other_dev);
1337                 if (error)
1338                         goto fail3;
1339         }
1340
1341         usb_fill_int_urb(wacom->irq, dev,
1342                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1343                          wacom_wac->data, features->pktlen,
1344                          wacom_sys_irq, wacom, endpoint->bInterval);
1345         wacom->irq->transfer_dma = wacom->data_dma;
1346         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1347
1348         error = wacom_initialize_leds(wacom);
1349         if (error)
1350                 goto fail4;
1351
1352         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1353                 error = wacom_register_input(wacom);
1354                 if (error)
1355                         goto fail5;
1356         }
1357
1358         /* Note that if query fails it is not a hard failure */
1359         wacom_query_tablet_data(intf, features);
1360
1361         usb_set_intfdata(intf, wacom);
1362
1363         if (features->quirks & WACOM_QUIRK_MONITOR) {
1364                 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
1365                         error = -EIO;
1366                         goto fail5;
1367                 }
1368         }
1369
1370         return 0;
1371
1372  fail5: wacom_destroy_leds(wacom);
1373  fail4: wacom_remove_shared_data(wacom_wac);
1374  fail3: usb_free_urb(wacom->irq);
1375  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1376  fail1: kfree(wacom);
1377         return error;
1378 }
1379
1380 static void wacom_disconnect(struct usb_interface *intf)
1381 {
1382         struct wacom *wacom = usb_get_intfdata(intf);
1383
1384         usb_set_intfdata(intf, NULL);
1385
1386         usb_kill_urb(wacom->irq);
1387         cancel_work_sync(&wacom->work);
1388         if (wacom->wacom_wac.input)
1389                 input_unregister_device(wacom->wacom_wac.input);
1390         wacom_destroy_battery(wacom);
1391         wacom_destroy_leds(wacom);
1392         usb_free_urb(wacom->irq);
1393         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1394                         wacom->wacom_wac.data, wacom->data_dma);
1395         wacom_remove_shared_data(&wacom->wacom_wac);
1396         kfree(wacom);
1397 }
1398
1399 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1400 {
1401         struct wacom *wacom = usb_get_intfdata(intf);
1402
1403         mutex_lock(&wacom->lock);
1404         usb_kill_urb(wacom->irq);
1405         mutex_unlock(&wacom->lock);
1406
1407         return 0;
1408 }
1409
1410 static int wacom_resume(struct usb_interface *intf)
1411 {
1412         struct wacom *wacom = usb_get_intfdata(intf);
1413         struct wacom_features *features = &wacom->wacom_wac.features;
1414         int rv = 0;
1415
1416         mutex_lock(&wacom->lock);
1417
1418         /* switch to wacom mode first */
1419         wacom_query_tablet_data(intf, features);
1420         wacom_led_control(wacom);
1421
1422         if ((wacom->open || (features->quirks & WACOM_QUIRK_MONITOR)) &&
1423             usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1424                 rv = -EIO;
1425
1426         mutex_unlock(&wacom->lock);
1427
1428         return rv;
1429 }
1430
1431 static int wacom_reset_resume(struct usb_interface *intf)
1432 {
1433         return wacom_resume(intf);
1434 }
1435
1436 static struct usb_driver wacom_driver = {
1437         .name =         "wacom",
1438         .id_table =     wacom_ids,
1439         .probe =        wacom_probe,
1440         .disconnect =   wacom_disconnect,
1441         .suspend =      wacom_suspend,
1442         .resume =       wacom_resume,
1443         .reset_resume = wacom_reset_resume,
1444         .supports_autosuspend = 1,
1445 };
1446
1447 module_usb_driver(wacom_driver);