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