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
wacom_get_report(struct usb_interface * intf,u8 type,u8 id,void * buf,size_t size,unsigned int retries)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
wacom_set_report(struct usb_interface * intf,u8 type,u8 id,void * buf,size_t size,unsigned int retries)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
wacom_sys_irq(struct urb * urb)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
wacom_open(struct input_dev * dev)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
wacom_close(struct input_dev * dev)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 */
wacom_calc_hid_res(int logical_extents,int physical_extents,unsigned char unit,unsigned char exponent)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 */
wacom_fix_phy_from_hid(struct wacom_features * features)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 */
wacom_set_phy_from_res(struct wacom_features * features)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
wacom_parse_logical_collection(unsigned char * report,struct wacom_features * features)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
wacom_retrieve_report_data(struct usb_interface * intf,struct wacom_features * features)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 */
wacom_parse_hid(struct usb_interface * intf,struct hid_descriptor * hid_desc,struct wacom_features * features)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
390 switch (features->type) {
391 case TABLETPC2FG:
392 features->pktlen = WACOM_PKGLEN_TPC2FG;
393 break;
394
395 case MTSCREEN:
396 case WACOM_24HDT:
397 features->pktlen = WACOM_PKGLEN_MTOUCH;
398 break;
399
400 case MTTPC:
401 features->pktlen = WACOM_PKGLEN_MTTPC;
402 break;
403
404 case BAMBOO_PT:
405 features->pktlen = WACOM_PKGLEN_BBTOUCH;
406 break;
407
408 default:
409 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
410 break;
411 }
412
413 switch (features->type) {
414 case BAMBOO_PT:
415 features->x_phy =
416 get_unaligned_le16(&report[i + 5]);
417 features->x_max =
418 get_unaligned_le16(&report[i + 8]);
419 i += 15;
420 break;
421
422 case WACOM_24HDT:
423 features->x_max =
424 get_unaligned_le16(&report[i + 3]);
425 features->x_phy =
426 get_unaligned_le16(&report[i + 8]);
427 features->unit = report[i - 1];
428 features->unitExpo = report[i - 3];
429 i += 12;
430 break;
431
432 default:
433 features->x_max =
434 get_unaligned_le16(&report[i + 3]);
435 features->x_phy =
436 get_unaligned_le16(&report[i + 6]);
437 features->unit = report[i + 9];
438 features->unitExpo = report[i + 11];
439 i += 12;
440 break;
441 }
442 } else if (pen) {
443 /* penabled only accepts exact bytes of data */
444 if (features->type >= TABLETPC)
445 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
446 features->device_type = BTN_TOOL_PEN;
447 features->x_max =
448 get_unaligned_le16(&report[i + 3]);
449 i += 4;
450 }
451 }
452 break;
453
454 case HID_USAGE_Y:
455 if (usage == WCM_DESKTOP) {
456 if (finger) {
457 switch (features->type) {
458 case TABLETPC2FG:
459 case MTSCREEN:
460 case MTTPC:
461 features->y_max =
462 get_unaligned_le16(&report[i + 3]);
463 features->y_phy =
464 get_unaligned_le16(&report[i + 6]);
465 i += 7;
466 break;
467
468 case WACOM_24HDT:
469 features->y_max =
470 get_unaligned_le16(&report[i + 3]);
471 features->y_phy =
472 get_unaligned_le16(&report[i - 2]);
473 i += 7;
474 break;
475
476 case BAMBOO_PT:
477 features->y_phy =
478 get_unaligned_le16(&report[i + 3]);
479 features->y_max =
480 get_unaligned_le16(&report[i + 6]);
481 i += 12;
482 break;
483
484 default:
485 features->y_max =
486 features->x_max;
487 features->y_phy =
488 get_unaligned_le16(&report[i + 3]);
489 i += 4;
490 break;
491 }
492 } else if (pen) {
493 features->y_max =
494 get_unaligned_le16(&report[i + 3]);
495 i += 4;
496 }
497 }
498 break;
499
500 case HID_USAGE_FINGER:
501 finger = 1;
502 i++;
503 break;
504
505 /*
506 * Requiring Stylus Usage will ignore boot mouse
507 * X/Y values and some cases of invalid Digitizer X/Y
508 * values commonly reported.
509 */
510 case HID_USAGE_STYLUS:
511 pen = 1;
512 i++;
513 break;
514
515 case HID_USAGE_CONTACTMAX:
516 /* leave touch_max as is if predefined */
517 if (!features->touch_max)
518 wacom_retrieve_report_data(intf, features);
519 i++;
520 break;
521 }
522 break;
523
524 case HID_COLLECTION_END:
525 /* reset UsagePage and Finger */
526 finger = usage = 0;
527 break;
528
529 case HID_COLLECTION:
530 i++;
531 switch (report[i]) {
532 case HID_COLLECTION_LOGICAL:
533 i += wacom_parse_logical_collection(&report[i],
534 features);
535 break;
536 }
537 break;
538 }
539 }
540
541 out:
542 result = 0;
543 kfree(report);
544 return result;
545 }
546
wacom_set_device_mode(struct usb_interface * intf,int report_id,int length,int mode)547 static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
548 {
549 unsigned char *rep_data;
550 int error = -ENOMEM, limit = 0;
551
552 rep_data = kzalloc(length, GFP_KERNEL);
553 if (!rep_data)
554 return error;
555
556 do {
557 rep_data[0] = report_id;
558 rep_data[1] = mode;
559
560 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
561 report_id, rep_data, length, 1);
562 if (error >= 0)
563 error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
564 report_id, rep_data, length, 1);
565 } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
566
567 kfree(rep_data);
568
569 return error < 0 ? error : 0;
570 }
571
572 /*
573 * Switch the tablet into its most-capable mode. Wacom tablets are
574 * typically configured to power-up in a mode which sends mouse-like
575 * reports to the OS. To get absolute position, pressure data, etc.
576 * from the tablet, it is necessary to switch the tablet out of this
577 * mode and into one which sends the full range of tablet data.
578 */
wacom_query_tablet_data(struct usb_interface * intf,struct wacom_features * features)579 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
580 {
581 if (features->device_type == BTN_TOOL_FINGER) {
582 if (features->type > TABLETPC) {
583 /* MT Tablet PC touch */
584 return wacom_set_device_mode(intf, 3, 4, 4);
585 }
586 else if (features->type == WACOM_24HDT) {
587 return wacom_set_device_mode(intf, 18, 3, 2);
588 }
589 } else if (features->device_type == BTN_TOOL_PEN) {
590 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
591 return wacom_set_device_mode(intf, 2, 2, 2);
592 }
593 }
594
595 return 0;
596 }
597
wacom_retrieve_hid_descriptor(struct usb_interface * intf,struct wacom_features * features)598 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
599 struct wacom_features *features)
600 {
601 int error = 0;
602 struct usb_host_interface *interface = intf->cur_altsetting;
603 struct hid_descriptor *hid_desc;
604
605 /* default features */
606 features->device_type = BTN_TOOL_PEN;
607 features->x_fuzz = 4;
608 features->y_fuzz = 4;
609 features->pressure_fuzz = 0;
610 features->distance_fuzz = 0;
611
612 /*
613 * The wireless device HID is basic and layout conflicts with
614 * other tablets (monitor and touch interface can look like pen).
615 * Skip the query for this type and modify defaults based on
616 * interface number.
617 */
618 if (features->type == WIRELESS) {
619 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
620 features->device_type = 0;
621 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
622 features->device_type = BTN_TOOL_FINGER;
623 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
624 }
625 }
626
627 /* only devices that support touch need to retrieve the info */
628 if (features->type < BAMBOO_PT) {
629 goto out;
630 }
631
632 error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
633 if (error) {
634 error = usb_get_extra_descriptor(&interface->endpoint[0],
635 HID_DEVICET_REPORT, &hid_desc);
636 if (error) {
637 dev_err(&intf->dev,
638 "can not retrieve extra class descriptor\n");
639 goto out;
640 }
641 }
642 error = wacom_parse_hid(intf, hid_desc, features);
643 if (error)
644 goto out;
645 wacom_fix_phy_from_hid(features);
646
647 out:
648 return error;
649 }
650
651 struct wacom_usbdev_data {
652 struct list_head list;
653 struct kref kref;
654 struct usb_device *dev;
655 struct wacom_shared shared;
656 };
657
658 static LIST_HEAD(wacom_udev_list);
659 static DEFINE_MUTEX(wacom_udev_list_lock);
660
wacom_get_sibling(struct usb_device * dev,int vendor,int product)661 static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
662 {
663 int port1;
664 struct usb_device *sibling;
665
666 if (vendor == 0 && product == 0)
667 return dev;
668
669 if (dev->parent == NULL)
670 return NULL;
671
672 usb_hub_for_each_child(dev->parent, port1, sibling) {
673 struct usb_device_descriptor *d;
674 if (sibling == NULL)
675 continue;
676
677 d = &sibling->descriptor;
678 if (d->idVendor == vendor && d->idProduct == product)
679 return sibling;
680 }
681
682 return NULL;
683 }
684
wacom_get_usbdev_data(struct usb_device * dev)685 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
686 {
687 struct wacom_usbdev_data *data;
688
689 list_for_each_entry(data, &wacom_udev_list, list) {
690 if (data->dev == dev) {
691 kref_get(&data->kref);
692 return data;
693 }
694 }
695
696 return NULL;
697 }
698
wacom_add_shared_data(struct wacom_wac * wacom,struct usb_device * dev)699 static int wacom_add_shared_data(struct wacom_wac *wacom,
700 struct usb_device *dev)
701 {
702 struct wacom_usbdev_data *data;
703 int retval = 0;
704
705 mutex_lock(&wacom_udev_list_lock);
706
707 data = wacom_get_usbdev_data(dev);
708 if (!data) {
709 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
710 if (!data) {
711 retval = -ENOMEM;
712 goto out;
713 }
714
715 kref_init(&data->kref);
716 data->dev = dev;
717 list_add_tail(&data->list, &wacom_udev_list);
718 }
719
720 wacom->shared = &data->shared;
721
722 out:
723 mutex_unlock(&wacom_udev_list_lock);
724 return retval;
725 }
726
wacom_release_shared_data(struct kref * kref)727 static void wacom_release_shared_data(struct kref *kref)
728 {
729 struct wacom_usbdev_data *data =
730 container_of(kref, struct wacom_usbdev_data, kref);
731
732 mutex_lock(&wacom_udev_list_lock);
733 list_del(&data->list);
734 mutex_unlock(&wacom_udev_list_lock);
735
736 kfree(data);
737 }
738
wacom_remove_shared_data(struct wacom_wac * wacom)739 static void wacom_remove_shared_data(struct wacom_wac *wacom)
740 {
741 struct wacom_usbdev_data *data;
742
743 if (wacom->shared) {
744 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
745 kref_put(&data->kref, wacom_release_shared_data);
746 wacom->shared = NULL;
747 }
748 }
749
wacom_led_control(struct wacom * wacom)750 static int wacom_led_control(struct wacom *wacom)
751 {
752 unsigned char *buf;
753 int retval;
754
755 buf = kzalloc(9, GFP_KERNEL);
756 if (!buf)
757 return -ENOMEM;
758
759 if (wacom->wacom_wac.features.type >= INTUOS5S &&
760 wacom->wacom_wac.features.type <= INTUOS5L) {
761 /*
762 * Touch Ring and crop mark LED luminance may take on
763 * one of four values:
764 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
765 */
766 int ring_led = wacom->led.select[0] & 0x03;
767 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
768 int crop_lum = 0;
769
770 buf[0] = WAC_CMD_LED_CONTROL;
771 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
772 }
773 else {
774 int led = wacom->led.select[0] | 0x4;
775
776 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
777 wacom->wacom_wac.features.type == WACOM_24HD)
778 led |= (wacom->led.select[1] << 4) | 0x40;
779
780 buf[0] = WAC_CMD_LED_CONTROL;
781 buf[1] = led;
782 buf[2] = wacom->led.llv;
783 buf[3] = wacom->led.hlv;
784 buf[4] = wacom->led.img_lum;
785 }
786
787 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
788 buf, 9, WAC_CMD_RETRIES);
789 kfree(buf);
790
791 return retval;
792 }
793
wacom_led_putimage(struct wacom * wacom,int button_id,const void * img)794 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
795 {
796 unsigned char *buf;
797 int i, retval;
798
799 buf = kzalloc(259, GFP_KERNEL);
800 if (!buf)
801 return -ENOMEM;
802
803 /* Send 'start' command */
804 buf[0] = WAC_CMD_ICON_START;
805 buf[1] = 1;
806 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
807 buf, 2, WAC_CMD_RETRIES);
808 if (retval < 0)
809 goto out;
810
811 buf[0] = WAC_CMD_ICON_XFER;
812 buf[1] = button_id & 0x07;
813 for (i = 0; i < 4; i++) {
814 buf[2] = i;
815 memcpy(buf + 3, img + i * 256, 256);
816
817 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
818 buf, 259, WAC_CMD_RETRIES);
819 if (retval < 0)
820 break;
821 }
822
823 /* Send 'stop' */
824 buf[0] = WAC_CMD_ICON_START;
825 buf[1] = 0;
826 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
827 buf, 2, WAC_CMD_RETRIES);
828
829 out:
830 kfree(buf);
831 return retval;
832 }
833
wacom_led_select_store(struct device * dev,int set_id,const char * buf,size_t count)834 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
835 const char *buf, size_t count)
836 {
837 struct wacom *wacom = dev_get_drvdata(dev);
838 unsigned int id;
839 int err;
840
841 err = kstrtouint(buf, 10, &id);
842 if (err)
843 return err;
844
845 mutex_lock(&wacom->lock);
846
847 wacom->led.select[set_id] = id & 0x3;
848 err = wacom_led_control(wacom);
849
850 mutex_unlock(&wacom->lock);
851
852 return err < 0 ? err : count;
853 }
854
855 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
856 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
857 struct device_attribute *attr, const char *buf, size_t count) \
858 { \
859 return wacom_led_select_store(dev, SET_ID, buf, count); \
860 } \
861 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
862 struct device_attribute *attr, char *buf) \
863 { \
864 struct wacom *wacom = dev_get_drvdata(dev); \
865 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
866 } \
867 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
868 wacom_led##SET_ID##_select_show, \
869 wacom_led##SET_ID##_select_store)
870
871 DEVICE_LED_SELECT_ATTR(0);
872 DEVICE_LED_SELECT_ATTR(1);
873
wacom_luminance_store(struct wacom * wacom,u8 * dest,const char * buf,size_t count)874 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
875 const char *buf, size_t count)
876 {
877 unsigned int value;
878 int err;
879
880 err = kstrtouint(buf, 10, &value);
881 if (err)
882 return err;
883
884 mutex_lock(&wacom->lock);
885
886 *dest = value & 0x7f;
887 err = wacom_led_control(wacom);
888
889 mutex_unlock(&wacom->lock);
890
891 return err < 0 ? err : count;
892 }
893
894 #define DEVICE_LUMINANCE_ATTR(name, field) \
895 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
896 struct device_attribute *attr, const char *buf, size_t count) \
897 { \
898 struct wacom *wacom = dev_get_drvdata(dev); \
899 \
900 return wacom_luminance_store(wacom, &wacom->led.field, \
901 buf, count); \
902 } \
903 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
904 NULL, wacom_##name##_luminance_store)
905
906 DEVICE_LUMINANCE_ATTR(status0, llv);
907 DEVICE_LUMINANCE_ATTR(status1, hlv);
908 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
909
wacom_button_image_store(struct device * dev,int button_id,const char * buf,size_t count)910 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
911 const char *buf, size_t count)
912 {
913 struct wacom *wacom = dev_get_drvdata(dev);
914 int err;
915
916 if (count != 1024)
917 return -EINVAL;
918
919 mutex_lock(&wacom->lock);
920
921 err = wacom_led_putimage(wacom, button_id, buf);
922
923 mutex_unlock(&wacom->lock);
924
925 return err < 0 ? err : count;
926 }
927
928 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
929 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
930 struct device_attribute *attr, const char *buf, size_t count) \
931 { \
932 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
933 } \
934 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
935 NULL, wacom_btnimg##BUTTON_ID##_store)
936
937 DEVICE_BTNIMG_ATTR(0);
938 DEVICE_BTNIMG_ATTR(1);
939 DEVICE_BTNIMG_ATTR(2);
940 DEVICE_BTNIMG_ATTR(3);
941 DEVICE_BTNIMG_ATTR(4);
942 DEVICE_BTNIMG_ATTR(5);
943 DEVICE_BTNIMG_ATTR(6);
944 DEVICE_BTNIMG_ATTR(7);
945
946 static struct attribute *cintiq_led_attrs[] = {
947 &dev_attr_status_led0_select.attr,
948 &dev_attr_status_led1_select.attr,
949 NULL
950 };
951
952 static struct attribute_group cintiq_led_attr_group = {
953 .name = "wacom_led",
954 .attrs = cintiq_led_attrs,
955 };
956
957 static struct attribute *intuos4_led_attrs[] = {
958 &dev_attr_status0_luminance.attr,
959 &dev_attr_status1_luminance.attr,
960 &dev_attr_status_led0_select.attr,
961 &dev_attr_buttons_luminance.attr,
962 &dev_attr_button0_rawimg.attr,
963 &dev_attr_button1_rawimg.attr,
964 &dev_attr_button2_rawimg.attr,
965 &dev_attr_button3_rawimg.attr,
966 &dev_attr_button4_rawimg.attr,
967 &dev_attr_button5_rawimg.attr,
968 &dev_attr_button6_rawimg.attr,
969 &dev_attr_button7_rawimg.attr,
970 NULL
971 };
972
973 static struct attribute_group intuos4_led_attr_group = {
974 .name = "wacom_led",
975 .attrs = intuos4_led_attrs,
976 };
977
978 static struct attribute *intuos5_led_attrs[] = {
979 &dev_attr_status0_luminance.attr,
980 &dev_attr_status_led0_select.attr,
981 NULL
982 };
983
984 static struct attribute_group intuos5_led_attr_group = {
985 .name = "wacom_led",
986 .attrs = intuos5_led_attrs,
987 };
988
wacom_initialize_leds(struct wacom * wacom)989 static int wacom_initialize_leds(struct wacom *wacom)
990 {
991 int error;
992
993 /* Initialize default values */
994 switch (wacom->wacom_wac.features.type) {
995 case INTUOS4S:
996 case INTUOS4:
997 case INTUOS4L:
998 wacom->led.select[0] = 0;
999 wacom->led.select[1] = 0;
1000 wacom->led.llv = 10;
1001 wacom->led.hlv = 20;
1002 wacom->led.img_lum = 10;
1003 error = sysfs_create_group(&wacom->intf->dev.kobj,
1004 &intuos4_led_attr_group);
1005 break;
1006
1007 case WACOM_24HD:
1008 case WACOM_21UX2:
1009 wacom->led.select[0] = 0;
1010 wacom->led.select[1] = 0;
1011 wacom->led.llv = 0;
1012 wacom->led.hlv = 0;
1013 wacom->led.img_lum = 0;
1014
1015 error = sysfs_create_group(&wacom->intf->dev.kobj,
1016 &cintiq_led_attr_group);
1017 break;
1018
1019 case INTUOS5S:
1020 case INTUOS5:
1021 case INTUOS5L:
1022 wacom->led.select[0] = 0;
1023 wacom->led.select[1] = 0;
1024 wacom->led.llv = 32;
1025 wacom->led.hlv = 0;
1026 wacom->led.img_lum = 0;
1027
1028 error = sysfs_create_group(&wacom->intf->dev.kobj,
1029 &intuos5_led_attr_group);
1030 break;
1031
1032 default:
1033 return 0;
1034 }
1035
1036 if (error) {
1037 dev_err(&wacom->intf->dev,
1038 "cannot create sysfs group err: %d\n", error);
1039 return error;
1040 }
1041 wacom_led_control(wacom);
1042
1043 return 0;
1044 }
1045
wacom_destroy_leds(struct wacom * wacom)1046 static void wacom_destroy_leds(struct wacom *wacom)
1047 {
1048 switch (wacom->wacom_wac.features.type) {
1049 case INTUOS4S:
1050 case INTUOS4:
1051 case INTUOS4L:
1052 sysfs_remove_group(&wacom->intf->dev.kobj,
1053 &intuos4_led_attr_group);
1054 break;
1055
1056 case WACOM_24HD:
1057 case WACOM_21UX2:
1058 sysfs_remove_group(&wacom->intf->dev.kobj,
1059 &cintiq_led_attr_group);
1060 break;
1061
1062 case INTUOS5S:
1063 case INTUOS5:
1064 case INTUOS5L:
1065 sysfs_remove_group(&wacom->intf->dev.kobj,
1066 &intuos5_led_attr_group);
1067 break;
1068 }
1069 }
1070
1071 static enum power_supply_property wacom_battery_props[] = {
1072 POWER_SUPPLY_PROP_CAPACITY
1073 };
1074
wacom_battery_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)1075 static int wacom_battery_get_property(struct power_supply *psy,
1076 enum power_supply_property psp,
1077 union power_supply_propval *val)
1078 {
1079 struct wacom *wacom = container_of(psy, struct wacom, battery);
1080 int ret = 0;
1081
1082 switch (psp) {
1083 case POWER_SUPPLY_PROP_CAPACITY:
1084 val->intval =
1085 wacom->wacom_wac.battery_capacity * 100 / 31;
1086 break;
1087 default:
1088 ret = -EINVAL;
1089 break;
1090 }
1091
1092 return ret;
1093 }
1094
wacom_initialize_battery(struct wacom * wacom)1095 static int wacom_initialize_battery(struct wacom *wacom)
1096 {
1097 int error = 0;
1098
1099 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1100 wacom->battery.properties = wacom_battery_props;
1101 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1102 wacom->battery.get_property = wacom_battery_get_property;
1103 wacom->battery.name = "wacom_battery";
1104 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1105 wacom->battery.use_for_apm = 0;
1106
1107 error = power_supply_register(&wacom->usbdev->dev,
1108 &wacom->battery);
1109
1110 if (!error)
1111 power_supply_powers(&wacom->battery,
1112 &wacom->usbdev->dev);
1113 }
1114
1115 return error;
1116 }
1117
wacom_destroy_battery(struct wacom * wacom)1118 static void wacom_destroy_battery(struct wacom *wacom)
1119 {
1120 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1121 wacom->battery.dev) {
1122 power_supply_unregister(&wacom->battery);
1123 wacom->battery.dev = NULL;
1124 }
1125 }
1126
wacom_register_input(struct wacom * wacom)1127 static int wacom_register_input(struct wacom *wacom)
1128 {
1129 struct input_dev *input_dev;
1130 struct usb_interface *intf = wacom->intf;
1131 struct usb_device *dev = interface_to_usbdev(intf);
1132 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1133 int error;
1134
1135 input_dev = input_allocate_device();
1136 if (!input_dev) {
1137 error = -ENOMEM;
1138 goto fail1;
1139 }
1140
1141 input_dev->name = wacom_wac->name;
1142 input_dev->dev.parent = &intf->dev;
1143 input_dev->open = wacom_open;
1144 input_dev->close = wacom_close;
1145 usb_to_input_id(dev, &input_dev->id);
1146 input_set_drvdata(input_dev, wacom);
1147
1148 wacom_wac->input = input_dev;
1149 error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1150 if (error)
1151 goto fail1;
1152
1153 error = input_register_device(input_dev);
1154 if (error)
1155 goto fail2;
1156
1157 return 0;
1158
1159 fail2:
1160 input_free_device(input_dev);
1161 wacom_wac->input = NULL;
1162 fail1:
1163 return error;
1164 }
1165
wacom_wireless_work(struct work_struct * work)1166 static void wacom_wireless_work(struct work_struct *work)
1167 {
1168 struct wacom *wacom = container_of(work, struct wacom, work);
1169 struct usb_device *usbdev = wacom->usbdev;
1170 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1171 struct wacom *wacom1, *wacom2;
1172 struct wacom_wac *wacom_wac1, *wacom_wac2;
1173 int error;
1174
1175 /*
1176 * Regardless if this is a disconnect or a new tablet,
1177 * remove any existing input and battery devices.
1178 */
1179
1180 wacom_destroy_battery(wacom);
1181
1182 /* Stylus interface */
1183 wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1184 wacom_wac1 = &(wacom1->wacom_wac);
1185 if (wacom_wac1->input)
1186 input_unregister_device(wacom_wac1->input);
1187 wacom_wac1->input = NULL;
1188
1189 /* Touch interface */
1190 wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1191 wacom_wac2 = &(wacom2->wacom_wac);
1192 if (wacom_wac2->input)
1193 input_unregister_device(wacom_wac2->input);
1194 wacom_wac2->input = NULL;
1195
1196 if (wacom_wac->pid == 0) {
1197 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1198 } else {
1199 const struct usb_device_id *id = wacom_ids;
1200
1201 dev_info(&wacom->intf->dev,
1202 "wireless tablet connected with PID %x\n",
1203 wacom_wac->pid);
1204
1205 while (id->match_flags) {
1206 if (id->idVendor == USB_VENDOR_ID_WACOM &&
1207 id->idProduct == wacom_wac->pid)
1208 break;
1209 id++;
1210 }
1211
1212 if (!id->match_flags) {
1213 dev_info(&wacom->intf->dev,
1214 "ignoring unknown PID.\n");
1215 return;
1216 }
1217
1218 /* Stylus interface */
1219 wacom_wac1->features =
1220 *((struct wacom_features *)id->driver_info);
1221 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1222 error = wacom_register_input(wacom1);
1223 if (error)
1224 goto fail1;
1225
1226 /* Touch interface */
1227 wacom_wac2->features =
1228 *((struct wacom_features *)id->driver_info);
1229 wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1230 wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1231 wacom_set_phy_from_res(&wacom_wac2->features);
1232 wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1233 error = wacom_register_input(wacom2);
1234 if (error)
1235 goto fail2;
1236
1237 error = wacom_initialize_battery(wacom);
1238 if (error)
1239 goto fail3;
1240 }
1241
1242 return;
1243
1244 fail3:
1245 input_unregister_device(wacom_wac2->input);
1246 wacom_wac2->input = NULL;
1247 fail2:
1248 input_unregister_device(wacom_wac1->input);
1249 wacom_wac1->input = NULL;
1250 fail1:
1251 return;
1252 }
1253
wacom_probe(struct usb_interface * intf,const struct usb_device_id * id)1254 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1255 {
1256 struct usb_device *dev = interface_to_usbdev(intf);
1257 struct usb_endpoint_descriptor *endpoint;
1258 struct wacom *wacom;
1259 struct wacom_wac *wacom_wac;
1260 struct wacom_features *features;
1261 int error;
1262
1263 if (!id->driver_info)
1264 return -EINVAL;
1265
1266 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1267 if (!wacom)
1268 return -ENOMEM;
1269
1270 wacom_wac = &wacom->wacom_wac;
1271 wacom_wac->features = *((struct wacom_features *)id->driver_info);
1272 features = &wacom_wac->features;
1273 if (features->pktlen > WACOM_PKGLEN_MAX) {
1274 error = -EINVAL;
1275 goto fail1;
1276 }
1277
1278 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1279 GFP_KERNEL, &wacom->data_dma);
1280 if (!wacom_wac->data) {
1281 error = -ENOMEM;
1282 goto fail1;
1283 }
1284
1285 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1286 if (!wacom->irq) {
1287 error = -ENOMEM;
1288 goto fail2;
1289 }
1290
1291 wacom->usbdev = dev;
1292 wacom->intf = intf;
1293 mutex_init(&wacom->lock);
1294 INIT_WORK(&wacom->work, wacom_wireless_work);
1295 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1296 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1297
1298 endpoint = &intf->cur_altsetting->endpoint[0].desc;
1299
1300 /* Retrieve the physical and logical size for touch devices */
1301 error = wacom_retrieve_hid_descriptor(intf, features);
1302 if (error)
1303 goto fail3;
1304
1305 /*
1306 * Intuos5 has no useful data about its touch interface in its
1307 * HID descriptor. If this is the touch interface (wMaxPacketSize
1308 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1309 */
1310 if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1311 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1312 features->device_type = BTN_TOOL_FINGER;
1313 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1314
1315 wacom_set_phy_from_res(features);
1316
1317 features->x_max = 4096;
1318 features->y_max = 4096;
1319 } else {
1320 features->device_type = BTN_TOOL_PEN;
1321 }
1322 }
1323
1324 wacom_setup_device_quirks(features);
1325
1326 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1327
1328 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1329 struct usb_device *other_dev;
1330
1331 /* Append the device type to the name */
1332 strlcat(wacom_wac->name,
1333 features->device_type == BTN_TOOL_PEN ?
1334 " Pen" : " Finger",
1335 sizeof(wacom_wac->name));
1336
1337
1338 other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
1339 if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
1340 other_dev = dev;
1341 error = wacom_add_shared_data(wacom_wac, other_dev);
1342 if (error)
1343 goto fail3;
1344 }
1345
1346 usb_fill_int_urb(wacom->irq, dev,
1347 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1348 wacom_wac->data, features->pktlen,
1349 wacom_sys_irq, wacom, endpoint->bInterval);
1350 wacom->irq->transfer_dma = wacom->data_dma;
1351 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1352
1353 error = wacom_initialize_leds(wacom);
1354 if (error)
1355 goto fail4;
1356
1357 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1358 error = wacom_register_input(wacom);
1359 if (error)
1360 goto fail5;
1361 }
1362
1363 /* Note that if query fails it is not a hard failure */
1364 wacom_query_tablet_data(intf, features);
1365
1366 usb_set_intfdata(intf, wacom);
1367
1368 if (features->quirks & WACOM_QUIRK_MONITOR) {
1369 if (usb_submit_urb(wacom->irq, GFP_KERNEL))
1370 goto fail5;
1371 }
1372
1373 return 0;
1374
1375 fail5: wacom_destroy_leds(wacom);
1376 fail4: wacom_remove_shared_data(wacom_wac);
1377 fail3: usb_free_urb(wacom->irq);
1378 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1379 fail1: kfree(wacom);
1380 return error;
1381 }
1382
wacom_disconnect(struct usb_interface * intf)1383 static void wacom_disconnect(struct usb_interface *intf)
1384 {
1385 struct wacom *wacom = usb_get_intfdata(intf);
1386
1387 usb_set_intfdata(intf, NULL);
1388
1389 usb_kill_urb(wacom->irq);
1390 cancel_work_sync(&wacom->work);
1391 if (wacom->wacom_wac.input)
1392 input_unregister_device(wacom->wacom_wac.input);
1393 wacom_destroy_battery(wacom);
1394 wacom_destroy_leds(wacom);
1395 usb_free_urb(wacom->irq);
1396 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1397 wacom->wacom_wac.data, wacom->data_dma);
1398 wacom_remove_shared_data(&wacom->wacom_wac);
1399 kfree(wacom);
1400 }
1401
wacom_suspend(struct usb_interface * intf,pm_message_t message)1402 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1403 {
1404 struct wacom *wacom = usb_get_intfdata(intf);
1405
1406 mutex_lock(&wacom->lock);
1407 usb_kill_urb(wacom->irq);
1408 mutex_unlock(&wacom->lock);
1409
1410 return 0;
1411 }
1412
wacom_resume(struct usb_interface * intf)1413 static int wacom_resume(struct usb_interface *intf)
1414 {
1415 struct wacom *wacom = usb_get_intfdata(intf);
1416 struct wacom_features *features = &wacom->wacom_wac.features;
1417 int rv = 0;
1418
1419 mutex_lock(&wacom->lock);
1420
1421 /* switch to wacom mode first */
1422 wacom_query_tablet_data(intf, features);
1423 wacom_led_control(wacom);
1424
1425 if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
1426 && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1427 rv = -EIO;
1428
1429 mutex_unlock(&wacom->lock);
1430
1431 return rv;
1432 }
1433
wacom_reset_resume(struct usb_interface * intf)1434 static int wacom_reset_resume(struct usb_interface *intf)
1435 {
1436 return wacom_resume(intf);
1437 }
1438
1439 static struct usb_driver wacom_driver = {
1440 .name = "wacom",
1441 .id_table = wacom_ids,
1442 .probe = wacom_probe,
1443 .disconnect = wacom_disconnect,
1444 .suspend = wacom_suspend,
1445 .resume = wacom_resume,
1446 .reset_resume = wacom_reset_resume,
1447 .supports_autosuspend = 1,
1448 };
1449
1450 module_usb_driver(wacom_driver);
1451