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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / drivers / input / tablet / wacom_sys.c
1 /*
2 * drivers/input/tablet/wacom_sys.c
3 *
4 * USB Wacom tablet support - system specific code
5 */
6
7 /*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include "wacom_wac.h"
15 #include "wacom.h"
16
17 /* defines to get HID report descriptor */
18 #define HID_DEVICET_HID (USB_TYPE_CLASS | 0x01)
19 #define HID_DEVICET_REPORT (USB_TYPE_CLASS | 0x02)
20 #define HID_USAGE_UNDEFINED 0x00
21 #define HID_USAGE_PAGE 0x05
22 #define HID_USAGE_PAGE_DIGITIZER 0x0d
23 #define HID_USAGE_PAGE_DESKTOP 0x01
24 #define HID_USAGE 0x09
25 #define HID_USAGE_X 0x30
26 #define HID_USAGE_Y 0x31
27 #define HID_USAGE_X_TILT 0x3d
28 #define HID_USAGE_Y_TILT 0x3e
29 #define HID_USAGE_FINGER 0x22
30 #define HID_USAGE_STYLUS 0x20
31 #define HID_USAGE_CONTACTMAX 0x55
32 #define HID_COLLECTION 0xa1
33 #define HID_COLLECTION_LOGICAL 0x02
34 #define HID_COLLECTION_END 0xc0
35
36 enum {
37 WCM_UNDEFINED = 0,
38 WCM_DESKTOP,
39 WCM_DIGITIZER,
40 };
41
42 struct hid_descriptor {
43 struct usb_descriptor_header header;
44 __le16 bcdHID;
45 u8 bCountryCode;
46 u8 bNumDescriptors;
47 u8 bDescriptorType;
48 __le16 wDescriptorLength;
49 } __attribute__ ((packed));
50
51 /* defines to get/set USB message */
52 #define USB_REQ_GET_REPORT 0x01
53 #define USB_REQ_SET_REPORT 0x09
54
55 #define WAC_HID_FEATURE_REPORT 0x03
56 #define WAC_MSG_RETRIES 5
57
58 #define WAC_CMD_LED_CONTROL 0x20
59 #define WAC_CMD_ICON_START 0x21
60 #define WAC_CMD_ICON_XFER 0x23
61 #define WAC_CMD_RETRIES 10
62
63 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
64 void *buf, size_t size, unsigned int retries)
65 {
66 struct usb_device *dev = interface_to_usbdev(intf);
67 int retval;
68
69 do {
70 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
71 USB_REQ_GET_REPORT,
72 USB_DIR_IN | USB_TYPE_CLASS |
73 USB_RECIP_INTERFACE,
74 (type << 8) + id,
75 intf->altsetting[0].desc.bInterfaceNumber,
76 buf, size, 100);
77 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
78
79 return retval;
80 }
81
82 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
83 void *buf, size_t size, unsigned int retries)
84 {
85 struct usb_device *dev = interface_to_usbdev(intf);
86 int retval;
87
88 do {
89 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
90 USB_REQ_SET_REPORT,
91 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
92 (type << 8) + id,
93 intf->altsetting[0].desc.bInterfaceNumber,
94 buf, size, 1000);
95 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
96
97 return retval;
98 }
99
100 static void wacom_sys_irq(struct urb *urb)
101 {
102 struct wacom *wacom = urb->context;
103 struct device *dev = &wacom->intf->dev;
104 int retval;
105
106 switch (urb->status) {
107 case 0:
108 /* success */
109 break;
110 case -ECONNRESET:
111 case -ENOENT:
112 case -ESHUTDOWN:
113 /* this urb is terminated, clean up */
114 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
115 __func__, urb->status);
116 return;
117 default:
118 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
119 __func__, urb->status);
120 goto exit;
121 }
122
123 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
124
125 exit:
126 usb_mark_last_busy(wacom->usbdev);
127 retval = usb_submit_urb(urb, GFP_ATOMIC);
128 if (retval)
129 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
130 __func__, retval);
131 }
132
133 static int wacom_open(struct input_dev *dev)
134 {
135 struct wacom *wacom = input_get_drvdata(dev);
136 int retval = 0;
137
138 if (usb_autopm_get_interface(wacom->intf) < 0)
139 return -EIO;
140
141 mutex_lock(&wacom->lock);
142
143 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
144 retval = -EIO;
145 goto out;
146 }
147
148 wacom->open = true;
149 wacom->intf->needs_remote_wakeup = 1;
150
151 out:
152 mutex_unlock(&wacom->lock);
153 usb_autopm_put_interface(wacom->intf);
154 return retval;
155 }
156
157 static void wacom_close(struct input_dev *dev)
158 {
159 struct wacom *wacom = input_get_drvdata(dev);
160 int autopm_error;
161
162 autopm_error = usb_autopm_get_interface(wacom->intf);
163
164 mutex_lock(&wacom->lock);
165 usb_kill_urb(wacom->irq);
166 wacom->open = false;
167 wacom->intf->needs_remote_wakeup = 0;
168 mutex_unlock(&wacom->lock);
169
170 if (!autopm_error)
171 usb_autopm_put_interface(wacom->intf);
172 }
173
174 /*
175 * Static values for max X/Y and resolution of Pen interface is stored in
176 * features. This mean physical size of active area can be computed.
177 * This is useful to do when Pen and Touch have same active area of tablet.
178 * This means for Touch device, we only need to find max X/Y value and we
179 * have enough information to compute resolution of touch.
180 */
181 static void wacom_set_phy_from_res(struct wacom_features *features)
182 {
183 features->x_phy = (features->x_max * 100) / features->x_resolution;
184 features->y_phy = (features->y_max * 100) / features->y_resolution;
185 }
186
187 static int wacom_parse_logical_collection(unsigned char *report,
188 struct wacom_features *features)
189 {
190 int length = 0;
191
192 if (features->type == BAMBOO_PT) {
193
194 /* Logical collection is only used by 3rd gen Bamboo Touch */
195 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
196 features->device_type = BTN_TOOL_FINGER;
197
198 wacom_set_phy_from_res(features);
199
200 features->x_max = features->y_max =
201 get_unaligned_le16(&report[10]);
202
203 length = 11;
204 }
205 return length;
206 }
207
208 static void wacom_retrieve_report_data(struct usb_interface *intf,
209 struct wacom_features *features)
210 {
211 int result = 0;
212 unsigned char *rep_data;
213
214 rep_data = kmalloc(2, GFP_KERNEL);
215 if (rep_data) {
216
217 rep_data[0] = 12;
218 result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
219 rep_data[0], &rep_data, 2,
220 WAC_MSG_RETRIES);
221
222 if (result >= 0 && rep_data[1] > 2)
223 features->touch_max = rep_data[1];
224
225 kfree(rep_data);
226 }
227 }
228
229 /*
230 * Interface Descriptor of wacom devices can be incomplete and
231 * inconsistent so wacom_features table is used to store stylus
232 * device's packet lengths, various maximum values, and tablet
233 * resolution based on product ID's.
234 *
235 * For devices that contain 2 interfaces, wacom_features table is
236 * inaccurate for the touch interface. Since the Interface Descriptor
237 * for touch interfaces has pretty complete data, this function exists
238 * to query tablet for this missing information instead of hard coding in
239 * an additional table.
240 *
241 * A typical Interface Descriptor for a stylus will contain a
242 * boot mouse application collection that is not of interest and this
243 * function will ignore it.
244 *
245 * It also contains a digitizer application collection that also is not
246 * of interest since any information it contains would be duplicate
247 * of what is in wacom_features. Usually it defines a report of an array
248 * of bytes that could be used as max length of the stylus packet returned.
249 * If it happens to define a Digitizer-Stylus Physical Collection then
250 * the X and Y logical values contain valid data but it is ignored.
251 *
252 * A typical Interface Descriptor for a touch interface will contain a
253 * Digitizer-Finger Physical Collection which will define both logical
254 * X/Y maximum as well as the physical size of tablet. Since touch
255 * interfaces haven't supported pressure or distance, this is enough
256 * information to override invalid values in the wacom_features table.
257 *
258 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
259 * Collection. Instead they define a Logical Collection with a single
260 * Logical Maximum for both X and Y.
261 *
262 * Intuos5 touch interface does not contain useful data. We deal with
263 * this after returning from this function.
264 */
265 static int wacom_parse_hid(struct usb_interface *intf,
266 struct hid_descriptor *hid_desc,
267 struct wacom_features *features)
268 {
269 struct usb_device *dev = interface_to_usbdev(intf);
270 char limit = 0;
271 /* result has to be defined as int for some devices */
272 int result = 0;
273 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
274 unsigned char *report;
275
276 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
277 if (!report)
278 return -ENOMEM;
279
280 /* retrive report descriptors */
281 do {
282 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
283 USB_REQ_GET_DESCRIPTOR,
284 USB_RECIP_INTERFACE | USB_DIR_IN,
285 HID_DEVICET_REPORT << 8,
286 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
287 report,
288 hid_desc->wDescriptorLength,
289 5000); /* 5 secs */
290 } while (result < 0 && limit++ < WAC_MSG_RETRIES);
291
292 /* No need to parse the Descriptor. It isn't an error though */
293 if (result < 0)
294 goto out;
295
296 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
297
298 switch (report[i]) {
299 case HID_USAGE_PAGE:
300 switch (report[i + 1]) {
301 case HID_USAGE_PAGE_DIGITIZER:
302 usage = WCM_DIGITIZER;
303 i++;
304 break;
305
306 case HID_USAGE_PAGE_DESKTOP:
307 usage = WCM_DESKTOP;
308 i++;
309 break;
310 }
311 break;
312
313 case HID_USAGE:
314 switch (report[i + 1]) {
315 case HID_USAGE_X:
316 if (usage == WCM_DESKTOP) {
317 if (finger) {
318 features->device_type = BTN_TOOL_FINGER;
319 if (features->type == TABLETPC2FG) {
320 /* need to reset back */
321 features->pktlen = WACOM_PKGLEN_TPC2FG;
322 }
323
324 if (features->type == MTSCREEN)
325 features->pktlen = WACOM_PKGLEN_MTOUCH;
326
327 if (features->type == BAMBOO_PT) {
328 /* need to reset back */
329 features->pktlen = WACOM_PKGLEN_BBTOUCH;
330 features->x_phy =
331 get_unaligned_le16(&report[i + 5]);
332 features->x_max =
333 get_unaligned_le16(&report[i + 8]);
334 i += 15;
335 } else {
336 features->x_max =
337 get_unaligned_le16(&report[i + 3]);
338 features->x_phy =
339 get_unaligned_le16(&report[i + 6]);
340 features->unit = report[i + 9];
341 features->unitExpo = report[i + 11];
342 i += 12;
343 }
344 } else if (pen) {
345 /* penabled only accepts exact bytes of data */
346 if (features->type == TABLETPC2FG)
347 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
348 features->device_type = BTN_TOOL_PEN;
349 features->x_max =
350 get_unaligned_le16(&report[i + 3]);
351 i += 4;
352 }
353 }
354 break;
355
356 case HID_USAGE_Y:
357 if (usage == WCM_DESKTOP) {
358 if (finger) {
359 int type = features->type;
360
361 if (type == TABLETPC2FG || type == MTSCREEN) {
362 features->y_max =
363 get_unaligned_le16(&report[i + 3]);
364 features->y_phy =
365 get_unaligned_le16(&report[i + 6]);
366 i += 7;
367 } else if (type == BAMBOO_PT) {
368 features->y_phy =
369 get_unaligned_le16(&report[i + 3]);
370 features->y_max =
371 get_unaligned_le16(&report[i + 6]);
372 i += 12;
373 } else {
374 features->y_max =
375 features->x_max;
376 features->y_phy =
377 get_unaligned_le16(&report[i + 3]);
378 i += 4;
379 }
380 } else if (pen) {
381 features->y_max =
382 get_unaligned_le16(&report[i + 3]);
383 i += 4;
384 }
385 }
386 break;
387
388 case HID_USAGE_FINGER:
389 finger = 1;
390 i++;
391 break;
392
393 /*
394 * Requiring Stylus Usage will ignore boot mouse
395 * X/Y values and some cases of invalid Digitizer X/Y
396 * values commonly reported.
397 */
398 case HID_USAGE_STYLUS:
399 pen = 1;
400 i++;
401 break;
402
403 case HID_USAGE_CONTACTMAX:
404 wacom_retrieve_report_data(intf, features);
405 i++;
406 break;
407 }
408 break;
409
410 case HID_COLLECTION_END:
411 /* reset UsagePage and Finger */
412 finger = usage = 0;
413 break;
414
415 case HID_COLLECTION:
416 i++;
417 switch (report[i]) {
418 case HID_COLLECTION_LOGICAL:
419 i += wacom_parse_logical_collection(&report[i],
420 features);
421 break;
422 }
423 break;
424 }
425 }
426
427 out:
428 result = 0;
429 kfree(report);
430 return result;
431 }
432
433 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
434 {
435 unsigned char *rep_data;
436 int limit = 0, report_id = 2;
437 int error = -ENOMEM;
438
439 rep_data = kmalloc(4, GFP_KERNEL);
440 if (!rep_data)
441 return error;
442
443 /* ask to report Wacom data */
444 if (features->device_type == BTN_TOOL_FINGER) {
445 /* if it is an MT Tablet PC touch */
446 if (features->type == TABLETPC2FG ||
447 features->type == MTSCREEN) {
448 do {
449 rep_data[0] = 3;
450 rep_data[1] = 4;
451 rep_data[2] = 0;
452 rep_data[3] = 0;
453 report_id = 3;
454 error = wacom_set_report(intf,
455 WAC_HID_FEATURE_REPORT,
456 report_id,
457 rep_data, 4, 1);
458 if (error >= 0)
459 error = wacom_get_report(intf,
460 WAC_HID_FEATURE_REPORT,
461 report_id,
462 rep_data, 4, 1);
463 } while ((error < 0 || rep_data[1] != 4) &&
464 limit++ < WAC_MSG_RETRIES);
465 }
466 } else if (features->type != TABLETPC &&
467 features->type != WIRELESS &&
468 features->device_type == BTN_TOOL_PEN) {
469 do {
470 rep_data[0] = 2;
471 rep_data[1] = 2;
472 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
473 report_id, rep_data, 2, 1);
474 if (error >= 0)
475 error = wacom_get_report(intf,
476 WAC_HID_FEATURE_REPORT,
477 report_id, rep_data, 2, 1);
478 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
479 }
480
481 kfree(rep_data);
482
483 return error < 0 ? error : 0;
484 }
485
486 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
487 struct wacom_features *features)
488 {
489 int error = 0;
490 struct usb_host_interface *interface = intf->cur_altsetting;
491 struct hid_descriptor *hid_desc;
492
493 /* default features */
494 features->device_type = BTN_TOOL_PEN;
495 features->x_fuzz = 4;
496 features->y_fuzz = 4;
497 features->pressure_fuzz = 0;
498 features->distance_fuzz = 0;
499
500 /*
501 * The wireless device HID is basic and layout conflicts with
502 * other tablets (monitor and touch interface can look like pen).
503 * Skip the query for this type and modify defaults based on
504 * interface number.
505 */
506 if (features->type == WIRELESS) {
507 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
508 features->device_type = 0;
509 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
510 features->device_type = BTN_TOOL_DOUBLETAP;
511 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
512 }
513 }
514
515 /* only devices that support touch need to retrieve the info */
516 if (features->type != TABLETPC &&
517 features->type != TABLETPC2FG &&
518 features->type != BAMBOO_PT &&
519 features->type != MTSCREEN) {
520 goto out;
521 }
522
523 error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
524 if (error) {
525 error = usb_get_extra_descriptor(&interface->endpoint[0],
526 HID_DEVICET_REPORT, &hid_desc);
527 if (error) {
528 dev_err(&intf->dev,
529 "can not retrieve extra class descriptor\n");
530 goto out;
531 }
532 }
533 error = wacom_parse_hid(intf, hid_desc, features);
534 if (error)
535 goto out;
536
537 out:
538 return error;
539 }
540
541 struct wacom_usbdev_data {
542 struct list_head list;
543 struct kref kref;
544 struct usb_device *dev;
545 struct wacom_shared shared;
546 };
547
548 static LIST_HEAD(wacom_udev_list);
549 static DEFINE_MUTEX(wacom_udev_list_lock);
550
551 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
552 {
553 struct wacom_usbdev_data *data;
554
555 list_for_each_entry(data, &wacom_udev_list, list) {
556 if (data->dev == dev) {
557 kref_get(&data->kref);
558 return data;
559 }
560 }
561
562 return NULL;
563 }
564
565 static int wacom_add_shared_data(struct wacom_wac *wacom,
566 struct usb_device *dev)
567 {
568 struct wacom_usbdev_data *data;
569 int retval = 0;
570
571 mutex_lock(&wacom_udev_list_lock);
572
573 data = wacom_get_usbdev_data(dev);
574 if (!data) {
575 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
576 if (!data) {
577 retval = -ENOMEM;
578 goto out;
579 }
580
581 kref_init(&data->kref);
582 data->dev = dev;
583 list_add_tail(&data->list, &wacom_udev_list);
584 }
585
586 wacom->shared = &data->shared;
587
588 out:
589 mutex_unlock(&wacom_udev_list_lock);
590 return retval;
591 }
592
593 static void wacom_release_shared_data(struct kref *kref)
594 {
595 struct wacom_usbdev_data *data =
596 container_of(kref, struct wacom_usbdev_data, kref);
597
598 mutex_lock(&wacom_udev_list_lock);
599 list_del(&data->list);
600 mutex_unlock(&wacom_udev_list_lock);
601
602 kfree(data);
603 }
604
605 static void wacom_remove_shared_data(struct wacom_wac *wacom)
606 {
607 struct wacom_usbdev_data *data;
608
609 if (wacom->shared) {
610 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
611 kref_put(&data->kref, wacom_release_shared_data);
612 wacom->shared = NULL;
613 }
614 }
615
616 static int wacom_led_control(struct wacom *wacom)
617 {
618 unsigned char *buf;
619 int retval;
620
621 buf = kzalloc(9, GFP_KERNEL);
622 if (!buf)
623 return -ENOMEM;
624
625 if (wacom->wacom_wac.features.type >= INTUOS5S &&
626 wacom->wacom_wac.features.type <= INTUOS5L) {
627 /*
628 * Touch Ring and crop mark LED luminance may take on
629 * one of four values:
630 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
631 */
632 int ring_led = wacom->led.select[0] & 0x03;
633 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
634 int crop_lum = 0;
635
636 buf[0] = WAC_CMD_LED_CONTROL;
637 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
638 }
639 else {
640 int led = wacom->led.select[0] | 0x4;
641
642 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
643 wacom->wacom_wac.features.type == WACOM_24HD)
644 led |= (wacom->led.select[1] << 4) | 0x40;
645
646 buf[0] = WAC_CMD_LED_CONTROL;
647 buf[1] = led;
648 buf[2] = wacom->led.llv;
649 buf[3] = wacom->led.hlv;
650 buf[4] = wacom->led.img_lum;
651 }
652
653 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
654 buf, 9, WAC_CMD_RETRIES);
655 kfree(buf);
656
657 return retval;
658 }
659
660 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
661 {
662 unsigned char *buf;
663 int i, retval;
664
665 buf = kzalloc(259, GFP_KERNEL);
666 if (!buf)
667 return -ENOMEM;
668
669 /* Send 'start' command */
670 buf[0] = WAC_CMD_ICON_START;
671 buf[1] = 1;
672 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
673 buf, 2, WAC_CMD_RETRIES);
674 if (retval < 0)
675 goto out;
676
677 buf[0] = WAC_CMD_ICON_XFER;
678 buf[1] = button_id & 0x07;
679 for (i = 0; i < 4; i++) {
680 buf[2] = i;
681 memcpy(buf + 3, img + i * 256, 256);
682
683 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
684 buf, 259, WAC_CMD_RETRIES);
685 if (retval < 0)
686 break;
687 }
688
689 /* Send 'stop' */
690 buf[0] = WAC_CMD_ICON_START;
691 buf[1] = 0;
692 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
693 buf, 2, WAC_CMD_RETRIES);
694
695 out:
696 kfree(buf);
697 return retval;
698 }
699
700 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
701 const char *buf, size_t count)
702 {
703 struct wacom *wacom = dev_get_drvdata(dev);
704 unsigned int id;
705 int err;
706
707 err = kstrtouint(buf, 10, &id);
708 if (err)
709 return err;
710
711 mutex_lock(&wacom->lock);
712
713 wacom->led.select[set_id] = id & 0x3;
714 err = wacom_led_control(wacom);
715
716 mutex_unlock(&wacom->lock);
717
718 return err < 0 ? err : count;
719 }
720
721 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
722 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
723 struct device_attribute *attr, const char *buf, size_t count) \
724 { \
725 return wacom_led_select_store(dev, SET_ID, buf, count); \
726 } \
727 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
728 struct device_attribute *attr, char *buf) \
729 { \
730 struct wacom *wacom = dev_get_drvdata(dev); \
731 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
732 } \
733 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
734 wacom_led##SET_ID##_select_show, \
735 wacom_led##SET_ID##_select_store)
736
737 DEVICE_LED_SELECT_ATTR(0);
738 DEVICE_LED_SELECT_ATTR(1);
739
740 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
741 const char *buf, size_t count)
742 {
743 unsigned int value;
744 int err;
745
746 err = kstrtouint(buf, 10, &value);
747 if (err)
748 return err;
749
750 mutex_lock(&wacom->lock);
751
752 *dest = value & 0x7f;
753 err = wacom_led_control(wacom);
754
755 mutex_unlock(&wacom->lock);
756
757 return err < 0 ? err : count;
758 }
759
760 #define DEVICE_LUMINANCE_ATTR(name, field) \
761 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
762 struct device_attribute *attr, const char *buf, size_t count) \
763 { \
764 struct wacom *wacom = dev_get_drvdata(dev); \
765 \
766 return wacom_luminance_store(wacom, &wacom->led.field, \
767 buf, count); \
768 } \
769 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
770 NULL, wacom_##name##_luminance_store)
771
772 DEVICE_LUMINANCE_ATTR(status0, llv);
773 DEVICE_LUMINANCE_ATTR(status1, hlv);
774 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
775
776 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
777 const char *buf, size_t count)
778 {
779 struct wacom *wacom = dev_get_drvdata(dev);
780 int err;
781
782 if (count != 1024)
783 return -EINVAL;
784
785 mutex_lock(&wacom->lock);
786
787 err = wacom_led_putimage(wacom, button_id, buf);
788
789 mutex_unlock(&wacom->lock);
790
791 return err < 0 ? err : count;
792 }
793
794 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
795 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
796 struct device_attribute *attr, const char *buf, size_t count) \
797 { \
798 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
799 } \
800 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
801 NULL, wacom_btnimg##BUTTON_ID##_store)
802
803 DEVICE_BTNIMG_ATTR(0);
804 DEVICE_BTNIMG_ATTR(1);
805 DEVICE_BTNIMG_ATTR(2);
806 DEVICE_BTNIMG_ATTR(3);
807 DEVICE_BTNIMG_ATTR(4);
808 DEVICE_BTNIMG_ATTR(5);
809 DEVICE_BTNIMG_ATTR(6);
810 DEVICE_BTNIMG_ATTR(7);
811
812 static struct attribute *cintiq_led_attrs[] = {
813 &dev_attr_status_led0_select.attr,
814 &dev_attr_status_led1_select.attr,
815 NULL
816 };
817
818 static struct attribute_group cintiq_led_attr_group = {
819 .name = "wacom_led",
820 .attrs = cintiq_led_attrs,
821 };
822
823 static struct attribute *intuos4_led_attrs[] = {
824 &dev_attr_status0_luminance.attr,
825 &dev_attr_status1_luminance.attr,
826 &dev_attr_status_led0_select.attr,
827 &dev_attr_buttons_luminance.attr,
828 &dev_attr_button0_rawimg.attr,
829 &dev_attr_button1_rawimg.attr,
830 &dev_attr_button2_rawimg.attr,
831 &dev_attr_button3_rawimg.attr,
832 &dev_attr_button4_rawimg.attr,
833 &dev_attr_button5_rawimg.attr,
834 &dev_attr_button6_rawimg.attr,
835 &dev_attr_button7_rawimg.attr,
836 NULL
837 };
838
839 static struct attribute_group intuos4_led_attr_group = {
840 .name = "wacom_led",
841 .attrs = intuos4_led_attrs,
842 };
843
844 static struct attribute *intuos5_led_attrs[] = {
845 &dev_attr_status0_luminance.attr,
846 &dev_attr_status_led0_select.attr,
847 NULL
848 };
849
850 static struct attribute_group intuos5_led_attr_group = {
851 .name = "wacom_led",
852 .attrs = intuos5_led_attrs,
853 };
854
855 static int wacom_initialize_leds(struct wacom *wacom)
856 {
857 int error;
858
859 /* Initialize default values */
860 switch (wacom->wacom_wac.features.type) {
861 case INTUOS4:
862 case INTUOS4L:
863 wacom->led.select[0] = 0;
864 wacom->led.select[1] = 0;
865 wacom->led.llv = 10;
866 wacom->led.hlv = 20;
867 wacom->led.img_lum = 10;
868 error = sysfs_create_group(&wacom->intf->dev.kobj,
869 &intuos4_led_attr_group);
870 break;
871
872 case WACOM_24HD:
873 case WACOM_21UX2:
874 wacom->led.select[0] = 0;
875 wacom->led.select[1] = 0;
876 wacom->led.llv = 0;
877 wacom->led.hlv = 0;
878 wacom->led.img_lum = 0;
879
880 error = sysfs_create_group(&wacom->intf->dev.kobj,
881 &cintiq_led_attr_group);
882 break;
883
884 case INTUOS5S:
885 case INTUOS5:
886 case INTUOS5L:
887 wacom->led.select[0] = 0;
888 wacom->led.select[1] = 0;
889 wacom->led.llv = 32;
890 wacom->led.hlv = 0;
891 wacom->led.img_lum = 0;
892
893 error = sysfs_create_group(&wacom->intf->dev.kobj,
894 &intuos5_led_attr_group);
895 break;
896
897 default:
898 return 0;
899 }
900
901 if (error) {
902 dev_err(&wacom->intf->dev,
903 "cannot create sysfs group err: %d\n", error);
904 return error;
905 }
906 wacom_led_control(wacom);
907
908 return 0;
909 }
910
911 static void wacom_destroy_leds(struct wacom *wacom)
912 {
913 switch (wacom->wacom_wac.features.type) {
914 case INTUOS4:
915 case INTUOS4L:
916 sysfs_remove_group(&wacom->intf->dev.kobj,
917 &intuos4_led_attr_group);
918 break;
919
920 case WACOM_24HD:
921 case WACOM_21UX2:
922 sysfs_remove_group(&wacom->intf->dev.kobj,
923 &cintiq_led_attr_group);
924 break;
925
926 case INTUOS5S:
927 case INTUOS5:
928 case INTUOS5L:
929 sysfs_remove_group(&wacom->intf->dev.kobj,
930 &intuos5_led_attr_group);
931 break;
932 }
933 }
934
935 static enum power_supply_property wacom_battery_props[] = {
936 POWER_SUPPLY_PROP_CAPACITY
937 };
938
939 static int wacom_battery_get_property(struct power_supply *psy,
940 enum power_supply_property psp,
941 union power_supply_propval *val)
942 {
943 struct wacom *wacom = container_of(psy, struct wacom, battery);
944 int ret = 0;
945
946 switch (psp) {
947 case POWER_SUPPLY_PROP_CAPACITY:
948 val->intval =
949 wacom->wacom_wac.battery_capacity * 100 / 31;
950 break;
951 default:
952 ret = -EINVAL;
953 break;
954 }
955
956 return ret;
957 }
958
959 static int wacom_initialize_battery(struct wacom *wacom)
960 {
961 int error = 0;
962
963 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
964 wacom->battery.properties = wacom_battery_props;
965 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
966 wacom->battery.get_property = wacom_battery_get_property;
967 wacom->battery.name = "wacom_battery";
968 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
969 wacom->battery.use_for_apm = 0;
970
971 error = power_supply_register(&wacom->usbdev->dev,
972 &wacom->battery);
973 }
974
975 return error;
976 }
977
978 static void wacom_destroy_battery(struct wacom *wacom)
979 {
980 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR)
981 power_supply_unregister(&wacom->battery);
982 }
983
984 static int wacom_register_input(struct wacom *wacom)
985 {
986 struct input_dev *input_dev;
987 struct usb_interface *intf = wacom->intf;
988 struct usb_device *dev = interface_to_usbdev(intf);
989 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
990 int error;
991
992 input_dev = input_allocate_device();
993 if (!input_dev) {
994 error = -ENOMEM;
995 goto fail1;
996 }
997
998 input_dev->name = wacom_wac->name;
999 input_dev->dev.parent = &intf->dev;
1000 input_dev->open = wacom_open;
1001 input_dev->close = wacom_close;
1002 usb_to_input_id(dev, &input_dev->id);
1003 input_set_drvdata(input_dev, wacom);
1004
1005 wacom_wac->input = input_dev;
1006 error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1007 if (error)
1008 goto fail1;
1009
1010 error = input_register_device(input_dev);
1011 if (error)
1012 goto fail2;
1013
1014 return 0;
1015
1016 fail2:
1017 input_free_device(input_dev);
1018 wacom_wac->input = NULL;
1019 fail1:
1020 return error;
1021 }
1022
1023 static void wacom_wireless_work(struct work_struct *work)
1024 {
1025 struct wacom *wacom = container_of(work, struct wacom, work);
1026 struct usb_device *usbdev = wacom->usbdev;
1027 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1028
1029 /*
1030 * Regardless if this is a disconnect or a new tablet,
1031 * remove any existing input devices.
1032 */
1033
1034 /* Stylus interface */
1035 wacom = usb_get_intfdata(usbdev->config->interface[1]);
1036 if (wacom->wacom_wac.input)
1037 input_unregister_device(wacom->wacom_wac.input);
1038 wacom->wacom_wac.input = NULL;
1039
1040 /* Touch interface */
1041 wacom = usb_get_intfdata(usbdev->config->interface[2]);
1042 if (wacom->wacom_wac.input)
1043 input_unregister_device(wacom->wacom_wac.input);
1044 wacom->wacom_wac.input = NULL;
1045
1046 if (wacom_wac->pid == 0) {
1047 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1048 } else {
1049 const struct usb_device_id *id = wacom_ids;
1050
1051 dev_info(&wacom->intf->dev,
1052 "wireless tablet connected with PID %x\n",
1053 wacom_wac->pid);
1054
1055 while (id->match_flags) {
1056 if (id->idVendor == USB_VENDOR_ID_WACOM &&
1057 id->idProduct == wacom_wac->pid)
1058 break;
1059 id++;
1060 }
1061
1062 if (!id->match_flags) {
1063 dev_info(&wacom->intf->dev,
1064 "ignoring unknown PID.\n");
1065 return;
1066 }
1067
1068 /* Stylus interface */
1069 wacom = usb_get_intfdata(usbdev->config->interface[1]);
1070 wacom_wac = &wacom->wacom_wac;
1071 wacom_wac->features =
1072 *((struct wacom_features *)id->driver_info);
1073 wacom_wac->features.device_type = BTN_TOOL_PEN;
1074 wacom_register_input(wacom);
1075
1076 /* Touch interface */
1077 wacom = usb_get_intfdata(usbdev->config->interface[2]);
1078 wacom_wac = &wacom->wacom_wac;
1079 wacom_wac->features =
1080 *((struct wacom_features *)id->driver_info);
1081 wacom_wac->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1082 wacom_wac->features.device_type = BTN_TOOL_FINGER;
1083 wacom_set_phy_from_res(&wacom_wac->features);
1084 wacom_wac->features.x_max = wacom_wac->features.y_max = 4096;
1085 wacom_register_input(wacom);
1086 }
1087 }
1088
1089 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1090 {
1091 struct usb_device *dev = interface_to_usbdev(intf);
1092 struct usb_endpoint_descriptor *endpoint;
1093 struct wacom *wacom;
1094 struct wacom_wac *wacom_wac;
1095 struct wacom_features *features;
1096 int error;
1097
1098 if (!id->driver_info)
1099 return -EINVAL;
1100
1101 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1102 if (!wacom)
1103 return -ENOMEM;
1104
1105 wacom_wac = &wacom->wacom_wac;
1106 wacom_wac->features = *((struct wacom_features *)id->driver_info);
1107 features = &wacom_wac->features;
1108 if (features->pktlen > WACOM_PKGLEN_MAX) {
1109 error = -EINVAL;
1110 goto fail1;
1111 }
1112
1113 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1114 GFP_KERNEL, &wacom->data_dma);
1115 if (!wacom_wac->data) {
1116 error = -ENOMEM;
1117 goto fail1;
1118 }
1119
1120 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1121 if (!wacom->irq) {
1122 error = -ENOMEM;
1123 goto fail2;
1124 }
1125
1126 wacom->usbdev = dev;
1127 wacom->intf = intf;
1128 mutex_init(&wacom->lock);
1129 INIT_WORK(&wacom->work, wacom_wireless_work);
1130 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1131 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1132
1133 endpoint = &intf->cur_altsetting->endpoint[0].desc;
1134
1135 /* Retrieve the physical and logical size for touch devices */
1136 error = wacom_retrieve_hid_descriptor(intf, features);
1137 if (error)
1138 goto fail3;
1139
1140 /*
1141 * Intuos5 has no useful data about its touch interface in its
1142 * HID descriptor. If this is the touch interface (wMaxPacketSize
1143 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1144 */
1145 if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1146 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1147 features->device_type = BTN_TOOL_FINGER;
1148 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1149
1150 features->x_phy =
1151 (features->x_max * 100) / features->x_resolution;
1152 features->y_phy =
1153 (features->y_max * 100) / features->y_resolution;
1154
1155 features->x_max = 4096;
1156 features->y_max = 4096;
1157 } else {
1158 features->device_type = BTN_TOOL_PEN;
1159 }
1160 }
1161
1162 wacom_setup_device_quirks(features);
1163
1164 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1165
1166 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1167 /* Append the device type to the name */
1168 strlcat(wacom_wac->name,
1169 features->device_type == BTN_TOOL_PEN ?
1170 " Pen" : " Finger",
1171 sizeof(wacom_wac->name));
1172
1173 error = wacom_add_shared_data(wacom_wac, dev);
1174 if (error)
1175 goto fail3;
1176 }
1177
1178 usb_fill_int_urb(wacom->irq, dev,
1179 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1180 wacom_wac->data, features->pktlen,
1181 wacom_sys_irq, wacom, endpoint->bInterval);
1182 wacom->irq->transfer_dma = wacom->data_dma;
1183 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1184
1185 error = wacom_initialize_leds(wacom);
1186 if (error)
1187 goto fail4;
1188
1189 error = wacom_initialize_battery(wacom);
1190 if (error)
1191 goto fail5;
1192
1193 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1194 error = wacom_register_input(wacom);
1195 if (error)
1196 goto fail6;
1197 }
1198
1199 /* Note that if query fails it is not a hard failure */
1200 wacom_query_tablet_data(intf, features);
1201
1202 usb_set_intfdata(intf, wacom);
1203
1204 if (features->quirks & WACOM_QUIRK_MONITOR) {
1205 if (usb_submit_urb(wacom->irq, GFP_KERNEL))
1206 goto fail5;
1207 }
1208
1209 return 0;
1210
1211 fail6: wacom_destroy_battery(wacom);
1212 fail5: wacom_destroy_leds(wacom);
1213 fail4: wacom_remove_shared_data(wacom_wac);
1214 fail3: usb_free_urb(wacom->irq);
1215 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1216 fail1: kfree(wacom);
1217 return error;
1218 }
1219
1220 static void wacom_disconnect(struct usb_interface *intf)
1221 {
1222 struct wacom *wacom = usb_get_intfdata(intf);
1223
1224 usb_set_intfdata(intf, NULL);
1225
1226 usb_kill_urb(wacom->irq);
1227 cancel_work_sync(&wacom->work);
1228 if (wacom->wacom_wac.input)
1229 input_unregister_device(wacom->wacom_wac.input);
1230 wacom_destroy_battery(wacom);
1231 wacom_destroy_leds(wacom);
1232 usb_free_urb(wacom->irq);
1233 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1234 wacom->wacom_wac.data, wacom->data_dma);
1235 wacom_remove_shared_data(&wacom->wacom_wac);
1236 kfree(wacom);
1237 }
1238
1239 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1240 {
1241 struct wacom *wacom = usb_get_intfdata(intf);
1242
1243 mutex_lock(&wacom->lock);
1244 usb_kill_urb(wacom->irq);
1245 mutex_unlock(&wacom->lock);
1246
1247 return 0;
1248 }
1249
1250 static int wacom_resume(struct usb_interface *intf)
1251 {
1252 struct wacom *wacom = usb_get_intfdata(intf);
1253 struct wacom_features *features = &wacom->wacom_wac.features;
1254 int rv = 0;
1255
1256 mutex_lock(&wacom->lock);
1257
1258 /* switch to wacom mode first */
1259 wacom_query_tablet_data(intf, features);
1260 wacom_led_control(wacom);
1261
1262 if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
1263 && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1264 rv = -EIO;
1265
1266 mutex_unlock(&wacom->lock);
1267
1268 return rv;
1269 }
1270
1271 static int wacom_reset_resume(struct usb_interface *intf)
1272 {
1273 return wacom_resume(intf);
1274 }
1275
1276 static struct usb_driver wacom_driver = {
1277 .name = "wacom",
1278 .id_table = wacom_ids,
1279 .probe = wacom_probe,
1280 .disconnect = wacom_disconnect,
1281 .suspend = wacom_suspend,
1282 .resume = wacom_resume,
1283 .reset_resume = wacom_reset_resume,
1284 .supports_autosuspend = 1,
1285 };
1286
1287 module_usb_driver(wacom_driver);
Linux kernel - Deliverables
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