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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 ((HID_USAGE_PAGE_DESKTOP << 16) | 0x30)
26#define HID_USAGE_Y ((HID_USAGE_PAGE_DESKTOP << 16) | 0x31)
27#define HID_USAGE_PRESSURE ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x30)
28#define HID_USAGE_X_TILT ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x3d)
29#define HID_USAGE_Y_TILT ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x3e)
30#define HID_USAGE_FINGER ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x22)
31#define HID_USAGE_STYLUS ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x20)
32#define HID_USAGE_CONTACTMAX ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x55)
33#define HID_COLLECTION 0xa1
34#define HID_COLLECTION_LOGICAL 0x02
35#define HID_COLLECTION_END 0xc0
36
37struct hid_descriptor {
38 struct usb_descriptor_header header;
39 __le16 bcdHID;
40 u8 bCountryCode;
41 u8 bNumDescriptors;
42 u8 bDescriptorType;
43 __le16 wDescriptorLength;
44} __attribute__ ((packed));
45
46/* defines to get/set USB message */
47#define USB_REQ_GET_REPORT 0x01
48#define USB_REQ_SET_REPORT 0x09
49
50#define WAC_HID_FEATURE_REPORT 0x03
51#define WAC_MSG_RETRIES 5
52
53#define WAC_CMD_LED_CONTROL 0x20
54#define WAC_CMD_ICON_START 0x21
55#define WAC_CMD_ICON_XFER 0x23
56#define WAC_CMD_RETRIES 10
57
58static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
59 void *buf, size_t size, unsigned int retries)
60{
61 struct usb_device *dev = interface_to_usbdev(intf);
62 int retval;
63
64 do {
65 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
66 USB_REQ_GET_REPORT,
67 USB_DIR_IN | USB_TYPE_CLASS |
68 USB_RECIP_INTERFACE,
69 (type << 8) + id,
70 intf->altsetting[0].desc.bInterfaceNumber,
71 buf, size, 100);
72 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
73
74 return retval;
75}
76
77static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
78 void *buf, size_t size, unsigned int retries)
79{
80 struct usb_device *dev = interface_to_usbdev(intf);
81 int retval;
82
83 do {
84 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
85 USB_REQ_SET_REPORT,
86 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
87 (type << 8) + id,
88 intf->altsetting[0].desc.bInterfaceNumber,
89 buf, size, 1000);
90 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
91
92 return retval;
93}
94
95static void wacom_sys_irq(struct urb *urb)
96{
97 struct wacom *wacom = urb->context;
98 struct device *dev = &wacom->intf->dev;
99 int retval;
100
101 switch (urb->status) {
102 case 0:
103 /* success */
104 break;
105 case -ECONNRESET:
106 case -ENOENT:
107 case -ESHUTDOWN:
108 /* this urb is terminated, clean up */
109 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
110 __func__, urb->status);
111 return;
112 default:
113 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
114 __func__, urb->status);
115 goto exit;
116 }
117
118 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
119
120 exit:
121 usb_mark_last_busy(wacom->usbdev);
122 retval = usb_submit_urb(urb, GFP_ATOMIC);
123 if (retval)
124 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
125 __func__, retval);
126}
127
128static int wacom_open(struct input_dev *dev)
129{
130 struct wacom *wacom = input_get_drvdata(dev);
131 int retval = 0;
132
133 if (usb_autopm_get_interface(wacom->intf) < 0)
134 return -EIO;
135
136 mutex_lock(&wacom->lock);
137
138 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
139 retval = -EIO;
140 goto out;
141 }
142
143 wacom->open = true;
144 wacom->intf->needs_remote_wakeup = 1;
145
146out:
147 mutex_unlock(&wacom->lock);
148 usb_autopm_put_interface(wacom->intf);
149 return retval;
150}
151
152static void wacom_close(struct input_dev *dev)
153{
154 struct wacom *wacom = input_get_drvdata(dev);
155 int autopm_error;
156
157 autopm_error = usb_autopm_get_interface(wacom->intf);
158
159 mutex_lock(&wacom->lock);
160 usb_kill_urb(wacom->irq);
161 wacom->open = false;
162 wacom->intf->needs_remote_wakeup = 0;
163 mutex_unlock(&wacom->lock);
164
165 if (!autopm_error)
166 usb_autopm_put_interface(wacom->intf);
167}
168
169/*
170 * Calculate the resolution of the X or Y axis, given appropriate HID data.
171 * This function is little more than hidinput_calc_abs_res stripped down.
172 */
173static int wacom_calc_hid_res(int logical_extents, int physical_extents,
174 unsigned char unit, unsigned char exponent)
175{
176 int prev, unit_exponent;
177
178 /* Check if the extents are sane */
179 if (logical_extents <= 0 || physical_extents <= 0)
180 return 0;
181
182 /* Get signed value of nybble-sized twos-compliment exponent */
183 unit_exponent = exponent;
184 if (unit_exponent > 7)
185 unit_exponent -= 16;
186
187 /* Convert physical_extents to millimeters */
188 if (unit == 0x11) { /* If centimeters */
189 unit_exponent += 1;
190 } else if (unit == 0x13) { /* If inches */
191 prev = physical_extents;
192 physical_extents *= 254;
193 if (physical_extents < prev)
194 return 0;
195 unit_exponent -= 1;
196 } else {
197 return 0;
198 }
199
200 /* Apply negative unit exponent */
201 for (; unit_exponent < 0; unit_exponent++) {
202 prev = logical_extents;
203 logical_extents *= 10;
204 if (logical_extents < prev)
205 return 0;
206 }
207 /* Apply positive unit exponent */
208 for (; unit_exponent > 0; unit_exponent--) {
209 prev = physical_extents;
210 physical_extents *= 10;
211 if (physical_extents < prev)
212 return 0;
213 }
214
215 /* Calculate resolution */
216 return logical_extents / physical_extents;
217}
218
219static int wacom_parse_logical_collection(unsigned char *report,
220 struct wacom_features *features)
221{
222 int length = 0;
223
224 if (features->type == BAMBOO_PT) {
225
226 /* Logical collection is only used by 3rd gen Bamboo Touch */
227 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
228 features->device_type = BTN_TOOL_FINGER;
229
230 features->x_max = features->y_max =
231 get_unaligned_le16(&report[10]);
232
233 length = 11;
234 }
235 return length;
236}
237
238static void wacom_retrieve_report_data(struct usb_interface *intf,
239 struct wacom_features *features)
240{
241 int result = 0;
242 unsigned char *rep_data;
243
244 rep_data = kmalloc(2, GFP_KERNEL);
245 if (rep_data) {
246
247 rep_data[0] = 12;
248 result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
249 rep_data[0], rep_data, 2,
250 WAC_MSG_RETRIES);
251
252 if (result >= 0 && rep_data[1] > 2)
253 features->touch_max = rep_data[1];
254
255 kfree(rep_data);
256 }
257}
258
259/*
260 * Interface Descriptor of wacom devices can be incomplete and
261 * inconsistent so wacom_features table is used to store stylus
262 * device's packet lengths, various maximum values, and tablet
263 * resolution based on product ID's.
264 *
265 * For devices that contain 2 interfaces, wacom_features table is
266 * inaccurate for the touch interface. Since the Interface Descriptor
267 * for touch interfaces has pretty complete data, this function exists
268 * to query tablet for this missing information instead of hard coding in
269 * an additional table.
270 *
271 * A typical Interface Descriptor for a stylus will contain a
272 * boot mouse application collection that is not of interest and this
273 * function will ignore it.
274 *
275 * It also contains a digitizer application collection that also is not
276 * of interest since any information it contains would be duplicate
277 * of what is in wacom_features. Usually it defines a report of an array
278 * of bytes that could be used as max length of the stylus packet returned.
279 * If it happens to define a Digitizer-Stylus Physical Collection then
280 * the X and Y logical values contain valid data but it is ignored.
281 *
282 * A typical Interface Descriptor for a touch interface will contain a
283 * Digitizer-Finger Physical Collection which will define both logical
284 * X/Y maximum as well as the physical size of tablet. Since touch
285 * interfaces haven't supported pressure or distance, this is enough
286 * information to override invalid values in the wacom_features table.
287 *
288 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
289 * Collection. Instead they define a Logical Collection with a single
290 * Logical Maximum for both X and Y.
291 *
292 * Intuos5 touch interface does not contain useful data. We deal with
293 * this after returning from this function.
294 */
295static int wacom_parse_hid(struct usb_interface *intf,
296 struct hid_descriptor *hid_desc,
297 struct wacom_features *features)
298{
299 struct usb_device *dev = interface_to_usbdev(intf);
300 char limit = 0;
301 /* result has to be defined as int for some devices */
302 int result = 0, touch_max = 0;
303 int i = 0, page = 0, finger = 0, pen = 0;
304 unsigned char *report;
305
306 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
307 if (!report)
308 return -ENOMEM;
309
310 /* retrive report descriptors */
311 do {
312 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
313 USB_REQ_GET_DESCRIPTOR,
314 USB_RECIP_INTERFACE | USB_DIR_IN,
315 HID_DEVICET_REPORT << 8,
316 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
317 report,
318 hid_desc->wDescriptorLength,
319 5000); /* 5 secs */
320 } while (result < 0 && limit++ < WAC_MSG_RETRIES);
321
322 /* No need to parse the Descriptor. It isn't an error though */
323 if (result < 0)
324 goto out;
325
326 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
327
328 switch (report[i]) {
329 case HID_USAGE_PAGE:
330 page = report[i + 1];
331 i++;
332 break;
333
334 case HID_USAGE:
335 switch (page << 16 | report[i + 1]) {
336 case HID_USAGE_X:
337 if (finger) {
338 features->device_type = BTN_TOOL_FINGER;
339 /* touch device at least supports one touch point */
340 touch_max = 1;
341 switch (features->type) {
342 case TABLETPC2FG:
343 features->pktlen = WACOM_PKGLEN_TPC2FG;
344 break;
345
346 case MTSCREEN:
347 case WACOM_24HDT:
348 features->pktlen = WACOM_PKGLEN_MTOUCH;
349 break;
350
351 case MTTPC:
352 features->pktlen = WACOM_PKGLEN_MTTPC;
353 break;
354
355 case BAMBOO_PT:
356 features->pktlen = WACOM_PKGLEN_BBTOUCH;
357 break;
358
359 default:
360 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
361 break;
362 }
363
364 switch (features->type) {
365 case BAMBOO_PT:
366 features->x_phy =
367 get_unaligned_le16(&report[i + 5]);
368 features->x_max =
369 get_unaligned_le16(&report[i + 8]);
370 i += 15;
371 break;
372
373 case WACOM_24HDT:
374 features->x_max =
375 get_unaligned_le16(&report[i + 3]);
376 features->x_phy =
377 get_unaligned_le16(&report[i + 8]);
378 features->unit = report[i - 1];
379 features->unitExpo = report[i - 3];
380 i += 12;
381 break;
382
383 default:
384 features->x_max =
385 get_unaligned_le16(&report[i + 3]);
386 features->x_phy =
387 get_unaligned_le16(&report[i + 6]);
388 features->unit = report[i + 9];
389 features->unitExpo = report[i + 11];
390 i += 12;
391 break;
392 }
393 } else if (pen) {
394 /* penabled only accepts exact bytes of data */
395 if (features->type >= TABLETPC)
396 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
397 features->device_type = BTN_TOOL_PEN;
398 features->x_max =
399 get_unaligned_le16(&report[i + 3]);
400 i += 4;
401 }
402 break;
403
404 case HID_USAGE_Y:
405 if (finger) {
406 switch (features->type) {
407 case TABLETPC2FG:
408 case MTSCREEN:
409 case MTTPC:
410 features->y_max =
411 get_unaligned_le16(&report[i + 3]);
412 features->y_phy =
413 get_unaligned_le16(&report[i + 6]);
414 i += 7;
415 break;
416
417 case WACOM_24HDT:
418 features->y_max =
419 get_unaligned_le16(&report[i + 3]);
420 features->y_phy =
421 get_unaligned_le16(&report[i - 2]);
422 i += 7;
423 break;
424
425 case BAMBOO_PT:
426 features->y_phy =
427 get_unaligned_le16(&report[i + 3]);
428 features->y_max =
429 get_unaligned_le16(&report[i + 6]);
430 i += 12;
431 break;
432
433 default:
434 features->y_max =
435 features->x_max;
436 features->y_phy =
437 get_unaligned_le16(&report[i + 3]);
438 i += 4;
439 break;
440 }
441 } else if (pen) {
442 features->y_max =
443 get_unaligned_le16(&report[i + 3]);
444 i += 4;
445 }
446 break;
447
448 case HID_USAGE_FINGER:
449 finger = 1;
450 i++;
451 break;
452
453 /*
454 * Requiring Stylus Usage will ignore boot mouse
455 * X/Y values and some cases of invalid Digitizer X/Y
456 * values commonly reported.
457 */
458 case HID_USAGE_STYLUS:
459 pen = 1;
460 i++;
461 break;
462
463 case HID_USAGE_CONTACTMAX:
464 /* leave touch_max as is if predefined */
465 if (!features->touch_max)
466 wacom_retrieve_report_data(intf, features);
467 i++;
468 break;
469
470 case HID_USAGE_PRESSURE:
471 if (pen) {
472 features->pressure_max =
473 get_unaligned_le16(&report[i + 3]);
474 i += 4;
475 }
476 break;
477 }
478 break;
479
480 case HID_COLLECTION_END:
481 /* reset UsagePage and Finger */
482 finger = page = 0;
483 break;
484
485 case HID_COLLECTION:
486 i++;
487 switch (report[i]) {
488 case HID_COLLECTION_LOGICAL:
489 i += wacom_parse_logical_collection(&report[i],
490 features);
491 break;
492 }
493 break;
494 }
495 }
496
497 out:
498 if (!features->touch_max && touch_max)
499 features->touch_max = touch_max;
500 result = 0;
501 kfree(report);
502 return result;
503}
504
505static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
506{
507 unsigned char *rep_data;
508 int error = -ENOMEM, limit = 0;
509
510 rep_data = kzalloc(length, GFP_KERNEL);
511 if (!rep_data)
512 return error;
513
514 do {
515 rep_data[0] = report_id;
516 rep_data[1] = mode;
517
518 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
519 report_id, rep_data, length, 1);
520 } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
521
522 kfree(rep_data);
523
524 return error < 0 ? error : 0;
525}
526
527/*
528 * Switch the tablet into its most-capable mode. Wacom tablets are
529 * typically configured to power-up in a mode which sends mouse-like
530 * reports to the OS. To get absolute position, pressure data, etc.
531 * from the tablet, it is necessary to switch the tablet out of this
532 * mode and into one which sends the full range of tablet data.
533 */
534static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
535{
536 if (features->device_type == BTN_TOOL_FINGER) {
537 if (features->type > TABLETPC) {
538 /* MT Tablet PC touch */
539 return wacom_set_device_mode(intf, 3, 4, 4);
540 }
541 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
542 return wacom_set_device_mode(intf, 18, 3, 2);
543 }
544 } else if (features->device_type == BTN_TOOL_PEN) {
545 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
546 return wacom_set_device_mode(intf, 2, 2, 2);
547 }
548 }
549
550 return 0;
551}
552
553static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
554 struct wacom_features *features)
555{
556 int error = 0;
557 struct usb_host_interface *interface = intf->cur_altsetting;
558 struct hid_descriptor *hid_desc;
559
560 /* default features */
561 features->device_type = BTN_TOOL_PEN;
562 features->x_fuzz = 4;
563 features->y_fuzz = 4;
564 features->pressure_fuzz = 0;
565 features->distance_fuzz = 0;
566
567 /*
568 * The wireless device HID is basic and layout conflicts with
569 * other tablets (monitor and touch interface can look like pen).
570 * Skip the query for this type and modify defaults based on
571 * interface number.
572 */
573 if (features->type == WIRELESS) {
574 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
575 features->device_type = 0;
576 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
577 features->device_type = BTN_TOOL_FINGER;
578 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
579 }
580 }
581
582 /* only devices that support touch need to retrieve the info */
583 if (features->type < BAMBOO_PT) {
584 goto out;
585 }
586
587 error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
588 if (error) {
589 error = usb_get_extra_descriptor(&interface->endpoint[0],
590 HID_DEVICET_REPORT, &hid_desc);
591 if (error) {
592 dev_err(&intf->dev,
593 "can not retrieve extra class descriptor\n");
594 goto out;
595 }
596 }
597 error = wacom_parse_hid(intf, hid_desc, features);
598
599 out:
600 return error;
601}
602
603struct wacom_usbdev_data {
604 struct list_head list;
605 struct kref kref;
606 struct usb_device *dev;
607 struct wacom_shared shared;
608};
609
610static LIST_HEAD(wacom_udev_list);
611static DEFINE_MUTEX(wacom_udev_list_lock);
612
613static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
614{
615 int port1;
616 struct usb_device *sibling;
617
618 if (vendor == 0 && product == 0)
619 return dev;
620
621 if (dev->parent == NULL)
622 return NULL;
623
624 usb_hub_for_each_child(dev->parent, port1, sibling) {
625 struct usb_device_descriptor *d;
626 if (sibling == NULL)
627 continue;
628
629 d = &sibling->descriptor;
630 if (d->idVendor == vendor && d->idProduct == product)
631 return sibling;
632 }
633
634 return NULL;
635}
636
637static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
638{
639 struct wacom_usbdev_data *data;
640
641 list_for_each_entry(data, &wacom_udev_list, list) {
642 if (data->dev == dev) {
643 kref_get(&data->kref);
644 return data;
645 }
646 }
647
648 return NULL;
649}
650
651static int wacom_add_shared_data(struct wacom_wac *wacom,
652 struct usb_device *dev)
653{
654 struct wacom_usbdev_data *data;
655 int retval = 0;
656
657 mutex_lock(&wacom_udev_list_lock);
658
659 data = wacom_get_usbdev_data(dev);
660 if (!data) {
661 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
662 if (!data) {
663 retval = -ENOMEM;
664 goto out;
665 }
666
667 kref_init(&data->kref);
668 data->dev = dev;
669 list_add_tail(&data->list, &wacom_udev_list);
670 }
671
672 wacom->shared = &data->shared;
673
674out:
675 mutex_unlock(&wacom_udev_list_lock);
676 return retval;
677}
678
679static void wacom_release_shared_data(struct kref *kref)
680{
681 struct wacom_usbdev_data *data =
682 container_of(kref, struct wacom_usbdev_data, kref);
683
684 mutex_lock(&wacom_udev_list_lock);
685 list_del(&data->list);
686 mutex_unlock(&wacom_udev_list_lock);
687
688 kfree(data);
689}
690
691static void wacom_remove_shared_data(struct wacom_wac *wacom)
692{
693 struct wacom_usbdev_data *data;
694
695 if (wacom->shared) {
696 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
697 kref_put(&data->kref, wacom_release_shared_data);
698 wacom->shared = NULL;
699 }
700}
701
702static int wacom_led_control(struct wacom *wacom)
703{
704 unsigned char *buf;
705 int retval;
706
707 buf = kzalloc(9, GFP_KERNEL);
708 if (!buf)
709 return -ENOMEM;
710
711 if (wacom->wacom_wac.features.type >= INTUOS5S &&
712 wacom->wacom_wac.features.type <= INTUOSPL) {
713 /*
714 * Touch Ring and crop mark LED luminance may take on
715 * one of four values:
716 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
717 */
718 int ring_led = wacom->led.select[0] & 0x03;
719 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
720 int crop_lum = 0;
721
722 buf[0] = WAC_CMD_LED_CONTROL;
723 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
724 }
725 else {
726 int led = wacom->led.select[0] | 0x4;
727
728 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
729 wacom->wacom_wac.features.type == WACOM_24HD)
730 led |= (wacom->led.select[1] << 4) | 0x40;
731
732 buf[0] = WAC_CMD_LED_CONTROL;
733 buf[1] = led;
734 buf[2] = wacom->led.llv;
735 buf[3] = wacom->led.hlv;
736 buf[4] = wacom->led.img_lum;
737 }
738
739 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
740 buf, 9, WAC_CMD_RETRIES);
741 kfree(buf);
742
743 return retval;
744}
745
746static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
747{
748 unsigned char *buf;
749 int i, retval;
750
751 buf = kzalloc(259, GFP_KERNEL);
752 if (!buf)
753 return -ENOMEM;
754
755 /* Send 'start' command */
756 buf[0] = WAC_CMD_ICON_START;
757 buf[1] = 1;
758 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
759 buf, 2, WAC_CMD_RETRIES);
760 if (retval < 0)
761 goto out;
762
763 buf[0] = WAC_CMD_ICON_XFER;
764 buf[1] = button_id & 0x07;
765 for (i = 0; i < 4; i++) {
766 buf[2] = i;
767 memcpy(buf + 3, img + i * 256, 256);
768
769 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
770 buf, 259, WAC_CMD_RETRIES);
771 if (retval < 0)
772 break;
773 }
774
775 /* Send 'stop' */
776 buf[0] = WAC_CMD_ICON_START;
777 buf[1] = 0;
778 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
779 buf, 2, WAC_CMD_RETRIES);
780
781out:
782 kfree(buf);
783 return retval;
784}
785
786static ssize_t wacom_led_select_store(struct device *dev, int set_id,
787 const char *buf, size_t count)
788{
789 struct wacom *wacom = dev_get_drvdata(dev);
790 unsigned int id;
791 int err;
792
793 err = kstrtouint(buf, 10, &id);
794 if (err)
795 return err;
796
797 mutex_lock(&wacom->lock);
798
799 wacom->led.select[set_id] = id & 0x3;
800 err = wacom_led_control(wacom);
801
802 mutex_unlock(&wacom->lock);
803
804 return err < 0 ? err : count;
805}
806
807#define DEVICE_LED_SELECT_ATTR(SET_ID) \
808static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
809 struct device_attribute *attr, const char *buf, size_t count) \
810{ \
811 return wacom_led_select_store(dev, SET_ID, buf, count); \
812} \
813static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
814 struct device_attribute *attr, char *buf) \
815{ \
816 struct wacom *wacom = dev_get_drvdata(dev); \
817 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
818} \
819static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
820 wacom_led##SET_ID##_select_show, \
821 wacom_led##SET_ID##_select_store)
822
823DEVICE_LED_SELECT_ATTR(0);
824DEVICE_LED_SELECT_ATTR(1);
825
826static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
827 const char *buf, size_t count)
828{
829 unsigned int value;
830 int err;
831
832 err = kstrtouint(buf, 10, &value);
833 if (err)
834 return err;
835
836 mutex_lock(&wacom->lock);
837
838 *dest = value & 0x7f;
839 err = wacom_led_control(wacom);
840
841 mutex_unlock(&wacom->lock);
842
843 return err < 0 ? err : count;
844}
845
846#define DEVICE_LUMINANCE_ATTR(name, field) \
847static ssize_t wacom_##name##_luminance_store(struct device *dev, \
848 struct device_attribute *attr, const char *buf, size_t count) \
849{ \
850 struct wacom *wacom = dev_get_drvdata(dev); \
851 \
852 return wacom_luminance_store(wacom, &wacom->led.field, \
853 buf, count); \
854} \
855static DEVICE_ATTR(name##_luminance, S_IWUSR, \
856 NULL, wacom_##name##_luminance_store)
857
858DEVICE_LUMINANCE_ATTR(status0, llv);
859DEVICE_LUMINANCE_ATTR(status1, hlv);
860DEVICE_LUMINANCE_ATTR(buttons, img_lum);
861
862static ssize_t wacom_button_image_store(struct device *dev, int button_id,
863 const char *buf, size_t count)
864{
865 struct wacom *wacom = dev_get_drvdata(dev);
866 int err;
867
868 if (count != 1024)
869 return -EINVAL;
870
871 mutex_lock(&wacom->lock);
872
873 err = wacom_led_putimage(wacom, button_id, buf);
874
875 mutex_unlock(&wacom->lock);
876
877 return err < 0 ? err : count;
878}
879
880#define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
881static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
882 struct device_attribute *attr, const char *buf, size_t count) \
883{ \
884 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
885} \
886static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
887 NULL, wacom_btnimg##BUTTON_ID##_store)
888
889DEVICE_BTNIMG_ATTR(0);
890DEVICE_BTNIMG_ATTR(1);
891DEVICE_BTNIMG_ATTR(2);
892DEVICE_BTNIMG_ATTR(3);
893DEVICE_BTNIMG_ATTR(4);
894DEVICE_BTNIMG_ATTR(5);
895DEVICE_BTNIMG_ATTR(6);
896DEVICE_BTNIMG_ATTR(7);
897
898static struct attribute *cintiq_led_attrs[] = {
899 &dev_attr_status_led0_select.attr,
900 &dev_attr_status_led1_select.attr,
901 NULL
902};
903
904static struct attribute_group cintiq_led_attr_group = {
905 .name = "wacom_led",
906 .attrs = cintiq_led_attrs,
907};
908
909static struct attribute *intuos4_led_attrs[] = {
910 &dev_attr_status0_luminance.attr,
911 &dev_attr_status1_luminance.attr,
912 &dev_attr_status_led0_select.attr,
913 &dev_attr_buttons_luminance.attr,
914 &dev_attr_button0_rawimg.attr,
915 &dev_attr_button1_rawimg.attr,
916 &dev_attr_button2_rawimg.attr,
917 &dev_attr_button3_rawimg.attr,
918 &dev_attr_button4_rawimg.attr,
919 &dev_attr_button5_rawimg.attr,
920 &dev_attr_button6_rawimg.attr,
921 &dev_attr_button7_rawimg.attr,
922 NULL
923};
924
925static struct attribute_group intuos4_led_attr_group = {
926 .name = "wacom_led",
927 .attrs = intuos4_led_attrs,
928};
929
930static struct attribute *intuos5_led_attrs[] = {
931 &dev_attr_status0_luminance.attr,
932 &dev_attr_status_led0_select.attr,
933 NULL
934};
935
936static struct attribute_group intuos5_led_attr_group = {
937 .name = "wacom_led",
938 .attrs = intuos5_led_attrs,
939};
940
941static int wacom_initialize_leds(struct wacom *wacom)
942{
943 int error;
944
945 /* Initialize default values */
946 switch (wacom->wacom_wac.features.type) {
947 case INTUOS4S:
948 case INTUOS4:
949 case INTUOS4L:
950 wacom->led.select[0] = 0;
951 wacom->led.select[1] = 0;
952 wacom->led.llv = 10;
953 wacom->led.hlv = 20;
954 wacom->led.img_lum = 10;
955 error = sysfs_create_group(&wacom->intf->dev.kobj,
956 &intuos4_led_attr_group);
957 break;
958
959 case WACOM_24HD:
960 case WACOM_21UX2:
961 wacom->led.select[0] = 0;
962 wacom->led.select[1] = 0;
963 wacom->led.llv = 0;
964 wacom->led.hlv = 0;
965 wacom->led.img_lum = 0;
966
967 error = sysfs_create_group(&wacom->intf->dev.kobj,
968 &cintiq_led_attr_group);
969 break;
970
971 case INTUOS5S:
972 case INTUOS5:
973 case INTUOS5L:
974 case INTUOSPS:
975 case INTUOSPM:
976 case INTUOSPL:
977 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
978 wacom->led.select[0] = 0;
979 wacom->led.select[1] = 0;
980 wacom->led.llv = 32;
981 wacom->led.hlv = 0;
982 wacom->led.img_lum = 0;
983
984 error = sysfs_create_group(&wacom->intf->dev.kobj,
985 &intuos5_led_attr_group);
986 } else
987 return 0;
988 break;
989
990 default:
991 return 0;
992 }
993
994 if (error) {
995 dev_err(&wacom->intf->dev,
996 "cannot create sysfs group err: %d\n", error);
997 return error;
998 }
999 wacom_led_control(wacom);
1000
1001 return 0;
1002}
1003
1004static void wacom_destroy_leds(struct wacom *wacom)
1005{
1006 switch (wacom->wacom_wac.features.type) {
1007 case INTUOS4S:
1008 case INTUOS4:
1009 case INTUOS4L:
1010 sysfs_remove_group(&wacom->intf->dev.kobj,
1011 &intuos4_led_attr_group);
1012 break;
1013
1014 case WACOM_24HD:
1015 case WACOM_21UX2:
1016 sysfs_remove_group(&wacom->intf->dev.kobj,
1017 &cintiq_led_attr_group);
1018 break;
1019
1020 case INTUOS5S:
1021 case INTUOS5:
1022 case INTUOS5L:
1023 case INTUOSPS:
1024 case INTUOSPM:
1025 case INTUOSPL:
1026 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
1027 sysfs_remove_group(&wacom->intf->dev.kobj,
1028 &intuos5_led_attr_group);
1029 break;
1030 }
1031}
1032
1033static enum power_supply_property wacom_battery_props[] = {
1034 POWER_SUPPLY_PROP_SCOPE,
1035 POWER_SUPPLY_PROP_CAPACITY
1036};
1037
1038static int wacom_battery_get_property(struct power_supply *psy,
1039 enum power_supply_property psp,
1040 union power_supply_propval *val)
1041{
1042 struct wacom *wacom = container_of(psy, struct wacom, battery);
1043 int ret = 0;
1044
1045 switch (psp) {
1046 case POWER_SUPPLY_PROP_SCOPE:
1047 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1048 break;
1049 case POWER_SUPPLY_PROP_CAPACITY:
1050 val->intval =
1051 wacom->wacom_wac.battery_capacity * 100 / 31;
1052 break;
1053 default:
1054 ret = -EINVAL;
1055 break;
1056 }
1057
1058 return ret;
1059}
1060
1061static int wacom_initialize_battery(struct wacom *wacom)
1062{
1063 int error = 0;
1064
1065 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1066 wacom->battery.properties = wacom_battery_props;
1067 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1068 wacom->battery.get_property = wacom_battery_get_property;
1069 wacom->battery.name = "wacom_battery";
1070 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1071 wacom->battery.use_for_apm = 0;
1072
1073 error = power_supply_register(&wacom->usbdev->dev,
1074 &wacom->battery);
1075
1076 if (!error)
1077 power_supply_powers(&wacom->battery,
1078 &wacom->usbdev->dev);
1079 }
1080
1081 return error;
1082}
1083
1084static void wacom_destroy_battery(struct wacom *wacom)
1085{
1086 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1087 wacom->battery.dev) {
1088 power_supply_unregister(&wacom->battery);
1089 wacom->battery.dev = NULL;
1090 }
1091}
1092
1093static int wacom_register_input(struct wacom *wacom)
1094{
1095 struct input_dev *input_dev;
1096 struct usb_interface *intf = wacom->intf;
1097 struct usb_device *dev = interface_to_usbdev(intf);
1098 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1099 int error;
1100
1101 input_dev = input_allocate_device();
1102 if (!input_dev) {
1103 error = -ENOMEM;
1104 goto fail1;
1105 }
1106
1107 input_dev->name = wacom_wac->name;
1108 input_dev->dev.parent = &intf->dev;
1109 input_dev->open = wacom_open;
1110 input_dev->close = wacom_close;
1111 usb_to_input_id(dev, &input_dev->id);
1112 input_set_drvdata(input_dev, wacom);
1113
1114 wacom_wac->input = input_dev;
1115 error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1116 if (error)
1117 goto fail1;
1118
1119 error = input_register_device(input_dev);
1120 if (error)
1121 goto fail2;
1122
1123 return 0;
1124
1125fail2:
1126 input_free_device(input_dev);
1127 wacom_wac->input = NULL;
1128fail1:
1129 return error;
1130}
1131
1132static void wacom_wireless_work(struct work_struct *work)
1133{
1134 struct wacom *wacom = container_of(work, struct wacom, work);
1135 struct usb_device *usbdev = wacom->usbdev;
1136 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1137 struct wacom *wacom1, *wacom2;
1138 struct wacom_wac *wacom_wac1, *wacom_wac2;
1139 int error;
1140
1141 /*
1142 * Regardless if this is a disconnect or a new tablet,
1143 * remove any existing input and battery devices.
1144 */
1145
1146 wacom_destroy_battery(wacom);
1147
1148 /* Stylus interface */
1149 wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1150 wacom_wac1 = &(wacom1->wacom_wac);
1151 if (wacom_wac1->input)
1152 input_unregister_device(wacom_wac1->input);
1153 wacom_wac1->input = NULL;
1154
1155 /* Touch interface */
1156 wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1157 wacom_wac2 = &(wacom2->wacom_wac);
1158 if (wacom_wac2->input)
1159 input_unregister_device(wacom_wac2->input);
1160 wacom_wac2->input = NULL;
1161
1162 if (wacom_wac->pid == 0) {
1163 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1164 } else {
1165 const struct usb_device_id *id = wacom_ids;
1166
1167 dev_info(&wacom->intf->dev,
1168 "wireless tablet connected with PID %x\n",
1169 wacom_wac->pid);
1170
1171 while (id->match_flags) {
1172 if (id->idVendor == USB_VENDOR_ID_WACOM &&
1173 id->idProduct == wacom_wac->pid)
1174 break;
1175 id++;
1176 }
1177
1178 if (!id->match_flags) {
1179 dev_info(&wacom->intf->dev,
1180 "ignoring unknown PID.\n");
1181 return;
1182 }
1183
1184 /* Stylus interface */
1185 wacom_wac1->features =
1186 *((struct wacom_features *)id->driver_info);
1187 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1188 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1189 wacom_wac1->features.name);
1190 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1191 wacom_wac1->shared->type = wacom_wac1->features.type;
1192 error = wacom_register_input(wacom1);
1193 if (error)
1194 goto fail;
1195
1196 /* Touch interface */
1197 if (wacom_wac1->features.touch_max ||
1198 wacom_wac1->features.type == INTUOSHT) {
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_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1204 if (wacom_wac2->features.touch_max)
1205 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1206 "%s (WL) Finger",wacom_wac2->features.name);
1207 else
1208 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1209 "%s (WL) Pad",wacom_wac2->features.name);
1210 error = wacom_register_input(wacom2);
1211 if (error)
1212 goto fail;
1213
1214 if (wacom_wac1->features.type == INTUOSHT &&
1215 wacom_wac1->features.touch_max)
1216 wacom_wac->shared->touch_input = wacom_wac2->input;
1217 }
1218
1219 error = wacom_initialize_battery(wacom);
1220 if (error)
1221 goto fail;
1222 }
1223
1224 return;
1225
1226fail:
1227 if (wacom_wac2->input) {
1228 input_unregister_device(wacom_wac2->input);
1229 wacom_wac2->input = NULL;
1230 }
1231
1232 if (wacom_wac1->input) {
1233 input_unregister_device(wacom_wac1->input);
1234 wacom_wac1->input = NULL;
1235 }
1236 return;
1237}
1238
1239/*
1240 * Not all devices report physical dimensions from HID.
1241 * Compute the default from hardcoded logical dimension
1242 * and resolution before driver overwrites them.
1243 */
1244static void wacom_set_default_phy(struct wacom_features *features)
1245{
1246 if (features->x_resolution) {
1247 features->x_phy = (features->x_max * 100) /
1248 features->x_resolution;
1249 features->y_phy = (features->y_max * 100) /
1250 features->y_resolution;
1251 }
1252}
1253
1254static void wacom_calculate_res(struct wacom_features *features)
1255{
1256 features->x_resolution = wacom_calc_hid_res(features->x_max,
1257 features->x_phy,
1258 features->unit,
1259 features->unitExpo);
1260 features->y_resolution = wacom_calc_hid_res(features->y_max,
1261 features->y_phy,
1262 features->unit,
1263 features->unitExpo);
1264}
1265
1266static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1267{
1268 struct usb_device *dev = interface_to_usbdev(intf);
1269 struct usb_endpoint_descriptor *endpoint;
1270 struct wacom *wacom;
1271 struct wacom_wac *wacom_wac;
1272 struct wacom_features *features;
1273 int error;
1274
1275 if (!id->driver_info)
1276 return -EINVAL;
1277
1278 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1279 if (!wacom)
1280 return -ENOMEM;
1281
1282 wacom_wac = &wacom->wacom_wac;
1283 wacom_wac->features = *((struct wacom_features *)id->driver_info);
1284 features = &wacom_wac->features;
1285 if (features->pktlen > WACOM_PKGLEN_MAX) {
1286 error = -EINVAL;
1287 goto fail1;
1288 }
1289
1290 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1291 GFP_KERNEL, &wacom->data_dma);
1292 if (!wacom_wac->data) {
1293 error = -ENOMEM;
1294 goto fail1;
1295 }
1296
1297 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1298 if (!wacom->irq) {
1299 error = -ENOMEM;
1300 goto fail2;
1301 }
1302
1303 wacom->usbdev = dev;
1304 wacom->intf = intf;
1305 mutex_init(&wacom->lock);
1306 INIT_WORK(&wacom->work, wacom_wireless_work);
1307 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1308 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1309
1310 endpoint = &intf->cur_altsetting->endpoint[0].desc;
1311
1312 /* set the default size in case we do not get them from hid */
1313 wacom_set_default_phy(features);
1314
1315 /* Retrieve the physical and logical size for touch devices */
1316 error = wacom_retrieve_hid_descriptor(intf, features);
1317 if (error)
1318 goto fail3;
1319
1320 /*
1321 * Intuos5 has no useful data about its touch interface in its
1322 * HID descriptor. If this is the touch interface (wMaxPacketSize
1323 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1324 */
1325 if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1326 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1327 features->device_type = BTN_TOOL_FINGER;
1328 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1329
1330 features->x_max = 4096;
1331 features->y_max = 4096;
1332 } else {
1333 features->device_type = BTN_TOOL_PEN;
1334 }
1335 }
1336
1337 wacom_setup_device_quirks(features);
1338
1339 /* set unit to "100th of a mm" for devices not reported by HID */
1340 if (!features->unit) {
1341 features->unit = 0x11;
1342 features->unitExpo = 16 - 3;
1343 }
1344 wacom_calculate_res(features);
1345
1346 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1347
1348 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1349 struct usb_device *other_dev;
1350
1351 /* Append the device type to the name */
1352 if (features->device_type != BTN_TOOL_FINGER)
1353 strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1354 else if (features->touch_max)
1355 strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1356 else
1357 strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1358
1359 other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
1360 if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
1361 other_dev = dev;
1362 error = wacom_add_shared_data(wacom_wac, other_dev);
1363 if (error)
1364 goto fail3;
1365 }
1366
1367 usb_fill_int_urb(wacom->irq, dev,
1368 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1369 wacom_wac->data, features->pktlen,
1370 wacom_sys_irq, wacom, endpoint->bInterval);
1371 wacom->irq->transfer_dma = wacom->data_dma;
1372 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1373
1374 error = wacom_initialize_leds(wacom);
1375 if (error)
1376 goto fail4;
1377
1378 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1379 error = wacom_register_input(wacom);
1380 if (error)
1381 goto fail5;
1382 }
1383
1384 /* Note that if query fails it is not a hard failure */
1385 wacom_query_tablet_data(intf, features);
1386
1387 usb_set_intfdata(intf, wacom);
1388
1389 if (features->quirks & WACOM_QUIRK_MONITOR) {
1390 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
1391 error = -EIO;
1392 goto fail5;
1393 }
1394 }
1395
1396 if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1397 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1398 wacom_wac->shared->touch_input = wacom_wac->input;
1399 }
1400
1401 return 0;
1402
1403 fail5: wacom_destroy_leds(wacom);
1404 fail4: wacom_remove_shared_data(wacom_wac);
1405 fail3: usb_free_urb(wacom->irq);
1406 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1407 fail1: kfree(wacom);
1408 return error;
1409}
1410
1411static void wacom_disconnect(struct usb_interface *intf)
1412{
1413 struct wacom *wacom = usb_get_intfdata(intf);
1414
1415 usb_set_intfdata(intf, NULL);
1416
1417 usb_kill_urb(wacom->irq);
1418 cancel_work_sync(&wacom->work);
1419 if (wacom->wacom_wac.input)
1420 input_unregister_device(wacom->wacom_wac.input);
1421 wacom_destroy_battery(wacom);
1422 wacom_destroy_leds(wacom);
1423 usb_free_urb(wacom->irq);
1424 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1425 wacom->wacom_wac.data, wacom->data_dma);
1426 wacom_remove_shared_data(&wacom->wacom_wac);
1427 kfree(wacom);
1428}
1429
1430static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1431{
1432 struct wacom *wacom = usb_get_intfdata(intf);
1433
1434 mutex_lock(&wacom->lock);
1435 usb_kill_urb(wacom->irq);
1436 mutex_unlock(&wacom->lock);
1437
1438 return 0;
1439}
1440
1441static int wacom_resume(struct usb_interface *intf)
1442{
1443 struct wacom *wacom = usb_get_intfdata(intf);
1444 struct wacom_features *features = &wacom->wacom_wac.features;
1445 int rv = 0;
1446
1447 mutex_lock(&wacom->lock);
1448
1449 /* switch to wacom mode first */
1450 wacom_query_tablet_data(intf, features);
1451 wacom_led_control(wacom);
1452
1453 if ((wacom->open || (features->quirks & WACOM_QUIRK_MONITOR)) &&
1454 usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1455 rv = -EIO;
1456
1457 mutex_unlock(&wacom->lock);
1458
1459 return rv;
1460}
1461
1462static int wacom_reset_resume(struct usb_interface *intf)
1463{
1464 return wacom_resume(intf);
1465}
1466
1467static struct usb_driver wacom_driver = {
1468 .name = "wacom",
1469 .id_table = wacom_ids,
1470 .probe = wacom_probe,
1471 .disconnect = wacom_disconnect,
1472 .suspend = wacom_suspend,
1473 .resume = wacom_resume,
1474 .reset_resume = wacom_reset_resume,
1475 .supports_autosuspend = 1,
1476};
1477
1478module_usb_driver(wacom_driver);