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Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 /* leave touch_max as is if predefined */
405 if (!features->touch_max)
406 wacom_retrieve_report_data(intf, features);
407 i++;
408 break;
409 }
410 break;
411
412 case HID_COLLECTION_END:
413 /* reset UsagePage and Finger */
414 finger = usage = 0;
415 break;
416
417 case HID_COLLECTION:
418 i++;
419 switch (report[i]) {
420 case HID_COLLECTION_LOGICAL:
421 i += wacom_parse_logical_collection(&report[i],
422 features);
423 break;
424 }
425 break;
426 }
427 }
428
429 out:
430 result = 0;
431 kfree(report);
432 return result;
433 }
434
435 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
436 {
437 unsigned char *rep_data;
438 int limit = 0, report_id = 2;
439 int error = -ENOMEM;
440
441 rep_data = kmalloc(4, GFP_KERNEL);
442 if (!rep_data)
443 return error;
444
445 /* ask to report Wacom data */
446 if (features->device_type == BTN_TOOL_FINGER) {
447 /* if it is an MT Tablet PC touch */
448 if (features->type == TABLETPC2FG ||
449 features->type == MTSCREEN) {
450 do {
451 rep_data[0] = 3;
452 rep_data[1] = 4;
453 rep_data[2] = 0;
454 rep_data[3] = 0;
455 report_id = 3;
456 error = wacom_set_report(intf,
457 WAC_HID_FEATURE_REPORT,
458 report_id,
459 rep_data, 4, 1);
460 if (error >= 0)
461 error = wacom_get_report(intf,
462 WAC_HID_FEATURE_REPORT,
463 report_id,
464 rep_data, 4, 1);
465 } while ((error < 0 || rep_data[1] != 4) &&
466 limit++ < WAC_MSG_RETRIES);
467 }
468 } else if (features->type != TABLETPC &&
469 features->type != WIRELESS &&
470 features->device_type == BTN_TOOL_PEN) {
471 do {
472 rep_data[0] = 2;
473 rep_data[1] = 2;
474 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
475 report_id, rep_data, 2, 1);
476 if (error >= 0)
477 error = wacom_get_report(intf,
478 WAC_HID_FEATURE_REPORT,
479 report_id, rep_data, 2, 1);
480 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
481 }
482
483 kfree(rep_data);
484
485 return error < 0 ? error : 0;
486 }
487
488 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
489 struct wacom_features *features)
490 {
491 int error = 0;
492 struct usb_host_interface *interface = intf->cur_altsetting;
493 struct hid_descriptor *hid_desc;
494
495 /* default features */
496 features->device_type = BTN_TOOL_PEN;
497 features->x_fuzz = 4;
498 features->y_fuzz = 4;
499 features->pressure_fuzz = 0;
500 features->distance_fuzz = 0;
501
502 /*
503 * The wireless device HID is basic and layout conflicts with
504 * other tablets (monitor and touch interface can look like pen).
505 * Skip the query for this type and modify defaults based on
506 * interface number.
507 */
508 if (features->type == WIRELESS) {
509 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
510 features->device_type = 0;
511 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
512 features->device_type = BTN_TOOL_DOUBLETAP;
513 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
514 }
515 }
516
517 /* only devices that support touch need to retrieve the info */
518 if (features->type != TABLETPC &&
519 features->type != TABLETPC2FG &&
520 features->type != BAMBOO_PT &&
521 features->type != MTSCREEN) {
522 goto out;
523 }
524
525 error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
526 if (error) {
527 error = usb_get_extra_descriptor(&interface->endpoint[0],
528 HID_DEVICET_REPORT, &hid_desc);
529 if (error) {
530 dev_err(&intf->dev,
531 "can not retrieve extra class descriptor\n");
532 goto out;
533 }
534 }
535 error = wacom_parse_hid(intf, hid_desc, features);
536 if (error)
537 goto out;
538
539 out:
540 return error;
541 }
542
543 struct wacom_usbdev_data {
544 struct list_head list;
545 struct kref kref;
546 struct usb_device *dev;
547 struct wacom_shared shared;
548 };
549
550 static LIST_HEAD(wacom_udev_list);
551 static DEFINE_MUTEX(wacom_udev_list_lock);
552
553 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
554 {
555 struct wacom_usbdev_data *data;
556
557 list_for_each_entry(data, &wacom_udev_list, list) {
558 if (data->dev == dev) {
559 kref_get(&data->kref);
560 return data;
561 }
562 }
563
564 return NULL;
565 }
566
567 static int wacom_add_shared_data(struct wacom_wac *wacom,
568 struct usb_device *dev)
569 {
570 struct wacom_usbdev_data *data;
571 int retval = 0;
572
573 mutex_lock(&wacom_udev_list_lock);
574
575 data = wacom_get_usbdev_data(dev);
576 if (!data) {
577 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
578 if (!data) {
579 retval = -ENOMEM;
580 goto out;
581 }
582
583 kref_init(&data->kref);
584 data->dev = dev;
585 list_add_tail(&data->list, &wacom_udev_list);
586 }
587
588 wacom->shared = &data->shared;
589
590 out:
591 mutex_unlock(&wacom_udev_list_lock);
592 return retval;
593 }
594
595 static void wacom_release_shared_data(struct kref *kref)
596 {
597 struct wacom_usbdev_data *data =
598 container_of(kref, struct wacom_usbdev_data, kref);
599
600 mutex_lock(&wacom_udev_list_lock);
601 list_del(&data->list);
602 mutex_unlock(&wacom_udev_list_lock);
603
604 kfree(data);
605 }
606
607 static void wacom_remove_shared_data(struct wacom_wac *wacom)
608 {
609 struct wacom_usbdev_data *data;
610
611 if (wacom->shared) {
612 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
613 kref_put(&data->kref, wacom_release_shared_data);
614 wacom->shared = NULL;
615 }
616 }
617
618 static int wacom_led_control(struct wacom *wacom)
619 {
620 unsigned char *buf;
621 int retval;
622
623 buf = kzalloc(9, GFP_KERNEL);
624 if (!buf)
625 return -ENOMEM;
626
627 if (wacom->wacom_wac.features.type >= INTUOS5S &&
628 wacom->wacom_wac.features.type <= INTUOS5L) {
629 /*
630 * Touch Ring and crop mark LED luminance may take on
631 * one of four values:
632 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
633 */
634 int ring_led = wacom->led.select[0] & 0x03;
635 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
636 int crop_lum = 0;
637
638 buf[0] = WAC_CMD_LED_CONTROL;
639 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
640 }
641 else {
642 int led = wacom->led.select[0] | 0x4;
643
644 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
645 wacom->wacom_wac.features.type == WACOM_24HD)
646 led |= (wacom->led.select[1] << 4) | 0x40;
647
648 buf[0] = WAC_CMD_LED_CONTROL;
649 buf[1] = led;
650 buf[2] = wacom->led.llv;
651 buf[3] = wacom->led.hlv;
652 buf[4] = wacom->led.img_lum;
653 }
654
655 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
656 buf, 9, WAC_CMD_RETRIES);
657 kfree(buf);
658
659 return retval;
660 }
661
662 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
663 {
664 unsigned char *buf;
665 int i, retval;
666
667 buf = kzalloc(259, GFP_KERNEL);
668 if (!buf)
669 return -ENOMEM;
670
671 /* Send 'start' command */
672 buf[0] = WAC_CMD_ICON_START;
673 buf[1] = 1;
674 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
675 buf, 2, WAC_CMD_RETRIES);
676 if (retval < 0)
677 goto out;
678
679 buf[0] = WAC_CMD_ICON_XFER;
680 buf[1] = button_id & 0x07;
681 for (i = 0; i < 4; i++) {
682 buf[2] = i;
683 memcpy(buf + 3, img + i * 256, 256);
684
685 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
686 buf, 259, WAC_CMD_RETRIES);
687 if (retval < 0)
688 break;
689 }
690
691 /* Send 'stop' */
692 buf[0] = WAC_CMD_ICON_START;
693 buf[1] = 0;
694 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
695 buf, 2, WAC_CMD_RETRIES);
696
697 out:
698 kfree(buf);
699 return retval;
700 }
701
702 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
703 const char *buf, size_t count)
704 {
705 struct wacom *wacom = dev_get_drvdata(dev);
706 unsigned int id;
707 int err;
708
709 err = kstrtouint(buf, 10, &id);
710 if (err)
711 return err;
712
713 mutex_lock(&wacom->lock);
714
715 wacom->led.select[set_id] = id & 0x3;
716 err = wacom_led_control(wacom);
717
718 mutex_unlock(&wacom->lock);
719
720 return err < 0 ? err : count;
721 }
722
723 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
724 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
725 struct device_attribute *attr, const char *buf, size_t count) \
726 { \
727 return wacom_led_select_store(dev, SET_ID, buf, count); \
728 } \
729 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
730 struct device_attribute *attr, char *buf) \
731 { \
732 struct wacom *wacom = dev_get_drvdata(dev); \
733 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
734 } \
735 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
736 wacom_led##SET_ID##_select_show, \
737 wacom_led##SET_ID##_select_store)
738
739 DEVICE_LED_SELECT_ATTR(0);
740 DEVICE_LED_SELECT_ATTR(1);
741
742 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
743 const char *buf, size_t count)
744 {
745 unsigned int value;
746 int err;
747
748 err = kstrtouint(buf, 10, &value);
749 if (err)
750 return err;
751
752 mutex_lock(&wacom->lock);
753
754 *dest = value & 0x7f;
755 err = wacom_led_control(wacom);
756
757 mutex_unlock(&wacom->lock);
758
759 return err < 0 ? err : count;
760 }
761
762 #define DEVICE_LUMINANCE_ATTR(name, field) \
763 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
764 struct device_attribute *attr, const char *buf, size_t count) \
765 { \
766 struct wacom *wacom = dev_get_drvdata(dev); \
767 \
768 return wacom_luminance_store(wacom, &wacom->led.field, \
769 buf, count); \
770 } \
771 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
772 NULL, wacom_##name##_luminance_store)
773
774 DEVICE_LUMINANCE_ATTR(status0, llv);
775 DEVICE_LUMINANCE_ATTR(status1, hlv);
776 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
777
778 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
779 const char *buf, size_t count)
780 {
781 struct wacom *wacom = dev_get_drvdata(dev);
782 int err;
783
784 if (count != 1024)
785 return -EINVAL;
786
787 mutex_lock(&wacom->lock);
788
789 err = wacom_led_putimage(wacom, button_id, buf);
790
791 mutex_unlock(&wacom->lock);
792
793 return err < 0 ? err : count;
794 }
795
796 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
797 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
798 struct device_attribute *attr, const char *buf, size_t count) \
799 { \
800 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
801 } \
802 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
803 NULL, wacom_btnimg##BUTTON_ID##_store)
804
805 DEVICE_BTNIMG_ATTR(0);
806 DEVICE_BTNIMG_ATTR(1);
807 DEVICE_BTNIMG_ATTR(2);
808 DEVICE_BTNIMG_ATTR(3);
809 DEVICE_BTNIMG_ATTR(4);
810 DEVICE_BTNIMG_ATTR(5);
811 DEVICE_BTNIMG_ATTR(6);
812 DEVICE_BTNIMG_ATTR(7);
813
814 static struct attribute *cintiq_led_attrs[] = {
815 &dev_attr_status_led0_select.attr,
816 &dev_attr_status_led1_select.attr,
817 NULL
818 };
819
820 static struct attribute_group cintiq_led_attr_group = {
821 .name = "wacom_led",
822 .attrs = cintiq_led_attrs,
823 };
824
825 static struct attribute *intuos4_led_attrs[] = {
826 &dev_attr_status0_luminance.attr,
827 &dev_attr_status1_luminance.attr,
828 &dev_attr_status_led0_select.attr,
829 &dev_attr_buttons_luminance.attr,
830 &dev_attr_button0_rawimg.attr,
831 &dev_attr_button1_rawimg.attr,
832 &dev_attr_button2_rawimg.attr,
833 &dev_attr_button3_rawimg.attr,
834 &dev_attr_button4_rawimg.attr,
835 &dev_attr_button5_rawimg.attr,
836 &dev_attr_button6_rawimg.attr,
837 &dev_attr_button7_rawimg.attr,
838 NULL
839 };
840
841 static struct attribute_group intuos4_led_attr_group = {
842 .name = "wacom_led",
843 .attrs = intuos4_led_attrs,
844 };
845
846 static struct attribute *intuos5_led_attrs[] = {
847 &dev_attr_status0_luminance.attr,
848 &dev_attr_status_led0_select.attr,
849 NULL
850 };
851
852 static struct attribute_group intuos5_led_attr_group = {
853 .name = "wacom_led",
854 .attrs = intuos5_led_attrs,
855 };
856
857 static int wacom_initialize_leds(struct wacom *wacom)
858 {
859 int error;
860
861 /* Initialize default values */
862 switch (wacom->wacom_wac.features.type) {
863 case INTUOS4:
864 case INTUOS4L:
865 wacom->led.select[0] = 0;
866 wacom->led.select[1] = 0;
867 wacom->led.llv = 10;
868 wacom->led.hlv = 20;
869 wacom->led.img_lum = 10;
870 error = sysfs_create_group(&wacom->intf->dev.kobj,
871 &intuos4_led_attr_group);
872 break;
873
874 case WACOM_24HD:
875 case WACOM_21UX2:
876 wacom->led.select[0] = 0;
877 wacom->led.select[1] = 0;
878 wacom->led.llv = 0;
879 wacom->led.hlv = 0;
880 wacom->led.img_lum = 0;
881
882 error = sysfs_create_group(&wacom->intf->dev.kobj,
883 &cintiq_led_attr_group);
884 break;
885
886 case INTUOS5S:
887 case INTUOS5:
888 case INTUOS5L:
889 wacom->led.select[0] = 0;
890 wacom->led.select[1] = 0;
891 wacom->led.llv = 32;
892 wacom->led.hlv = 0;
893 wacom->led.img_lum = 0;
894
895 error = sysfs_create_group(&wacom->intf->dev.kobj,
896 &intuos5_led_attr_group);
897 break;
898
899 default:
900 return 0;
901 }
902
903 if (error) {
904 dev_err(&wacom->intf->dev,
905 "cannot create sysfs group err: %d\n", error);
906 return error;
907 }
908 wacom_led_control(wacom);
909
910 return 0;
911 }
912
913 static void wacom_destroy_leds(struct wacom *wacom)
914 {
915 switch (wacom->wacom_wac.features.type) {
916 case INTUOS4:
917 case INTUOS4L:
918 sysfs_remove_group(&wacom->intf->dev.kobj,
919 &intuos4_led_attr_group);
920 break;
921
922 case WACOM_24HD:
923 case WACOM_21UX2:
924 sysfs_remove_group(&wacom->intf->dev.kobj,
925 &cintiq_led_attr_group);
926 break;
927
928 case INTUOS5S:
929 case INTUOS5:
930 case INTUOS5L:
931 sysfs_remove_group(&wacom->intf->dev.kobj,
932 &intuos5_led_attr_group);
933 break;
934 }
935 }
936
937 static enum power_supply_property wacom_battery_props[] = {
938 POWER_SUPPLY_PROP_CAPACITY
939 };
940
941 static int wacom_battery_get_property(struct power_supply *psy,
942 enum power_supply_property psp,
943 union power_supply_propval *val)
944 {
945 struct wacom *wacom = container_of(psy, struct wacom, battery);
946 int ret = 0;
947
948 switch (psp) {
949 case POWER_SUPPLY_PROP_CAPACITY:
950 val->intval =
951 wacom->wacom_wac.battery_capacity * 100 / 31;
952 break;
953 default:
954 ret = -EINVAL;
955 break;
956 }
957
958 return ret;
959 }
960
961 static int wacom_initialize_battery(struct wacom *wacom)
962 {
963 int error = 0;
964
965 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
966 wacom->battery.properties = wacom_battery_props;
967 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
968 wacom->battery.get_property = wacom_battery_get_property;
969 wacom->battery.name = "wacom_battery";
970 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
971 wacom->battery.use_for_apm = 0;
972
973 error = power_supply_register(&wacom->usbdev->dev,
974 &wacom->battery);
975 }
976
977 return error;
978 }
979
980 static void wacom_destroy_battery(struct wacom *wacom)
981 {
982 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR)
983 power_supply_unregister(&wacom->battery);
984 }
985
986 static int wacom_register_input(struct wacom *wacom)
987 {
988 struct input_dev *input_dev;
989 struct usb_interface *intf = wacom->intf;
990 struct usb_device *dev = interface_to_usbdev(intf);
991 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
992 int error;
993
994 input_dev = input_allocate_device();
995 if (!input_dev) {
996 error = -ENOMEM;
997 goto fail1;
998 }
999
1000 input_dev->name = wacom_wac->name;
1001 input_dev->dev.parent = &intf->dev;
1002 input_dev->open = wacom_open;
1003 input_dev->close = wacom_close;
1004 usb_to_input_id(dev, &input_dev->id);
1005 input_set_drvdata(input_dev, wacom);
1006
1007 wacom_wac->input = input_dev;
1008 error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1009 if (error)
1010 goto fail1;
1011
1012 error = input_register_device(input_dev);
1013 if (error)
1014 goto fail2;
1015
1016 return 0;
1017
1018 fail2:
1019 input_free_device(input_dev);
1020 wacom_wac->input = NULL;
1021 fail1:
1022 return error;
1023 }
1024
1025 static void wacom_wireless_work(struct work_struct *work)
1026 {
1027 struct wacom *wacom = container_of(work, struct wacom, work);
1028 struct usb_device *usbdev = wacom->usbdev;
1029 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1030
1031 /*
1032 * Regardless if this is a disconnect or a new tablet,
1033 * remove any existing input devices.
1034 */
1035
1036 /* Stylus interface */
1037 wacom = usb_get_intfdata(usbdev->config->interface[1]);
1038 if (wacom->wacom_wac.input)
1039 input_unregister_device(wacom->wacom_wac.input);
1040 wacom->wacom_wac.input = NULL;
1041
1042 /* Touch interface */
1043 wacom = usb_get_intfdata(usbdev->config->interface[2]);
1044 if (wacom->wacom_wac.input)
1045 input_unregister_device(wacom->wacom_wac.input);
1046 wacom->wacom_wac.input = NULL;
1047
1048 if (wacom_wac->pid == 0) {
1049 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1050 } else {
1051 const struct usb_device_id *id = wacom_ids;
1052
1053 dev_info(&wacom->intf->dev,
1054 "wireless tablet connected with PID %x\n",
1055 wacom_wac->pid);
1056
1057 while (id->match_flags) {
1058 if (id->idVendor == USB_VENDOR_ID_WACOM &&
1059 id->idProduct == wacom_wac->pid)
1060 break;
1061 id++;
1062 }
1063
1064 if (!id->match_flags) {
1065 dev_info(&wacom->intf->dev,
1066 "ignoring unknown PID.\n");
1067 return;
1068 }
1069
1070 /* Stylus interface */
1071 wacom = usb_get_intfdata(usbdev->config->interface[1]);
1072 wacom_wac = &wacom->wacom_wac;
1073 wacom_wac->features =
1074 *((struct wacom_features *)id->driver_info);
1075 wacom_wac->features.device_type = BTN_TOOL_PEN;
1076 wacom_register_input(wacom);
1077
1078 /* Touch interface */
1079 wacom = usb_get_intfdata(usbdev->config->interface[2]);
1080 wacom_wac = &wacom->wacom_wac;
1081 wacom_wac->features =
1082 *((struct wacom_features *)id->driver_info);
1083 wacom_wac->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1084 wacom_wac->features.device_type = BTN_TOOL_FINGER;
1085 wacom_set_phy_from_res(&wacom_wac->features);
1086 wacom_wac->features.x_max = wacom_wac->features.y_max = 4096;
1087 wacom_register_input(wacom);
1088 }
1089 }
1090
1091 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1092 {
1093 struct usb_device *dev = interface_to_usbdev(intf);
1094 struct usb_endpoint_descriptor *endpoint;
1095 struct wacom *wacom;
1096 struct wacom_wac *wacom_wac;
1097 struct wacom_features *features;
1098 int error;
1099
1100 if (!id->driver_info)
1101 return -EINVAL;
1102
1103 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1104 if (!wacom)
1105 return -ENOMEM;
1106
1107 wacom_wac = &wacom->wacom_wac;
1108 wacom_wac->features = *((struct wacom_features *)id->driver_info);
1109 features = &wacom_wac->features;
1110 if (features->pktlen > WACOM_PKGLEN_MAX) {
1111 error = -EINVAL;
1112 goto fail1;
1113 }
1114
1115 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1116 GFP_KERNEL, &wacom->data_dma);
1117 if (!wacom_wac->data) {
1118 error = -ENOMEM;
1119 goto fail1;
1120 }
1121
1122 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1123 if (!wacom->irq) {
1124 error = -ENOMEM;
1125 goto fail2;
1126 }
1127
1128 wacom->usbdev = dev;
1129 wacom->intf = intf;
1130 mutex_init(&wacom->lock);
1131 INIT_WORK(&wacom->work, wacom_wireless_work);
1132 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1133 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1134
1135 endpoint = &intf->cur_altsetting->endpoint[0].desc;
1136
1137 /* Retrieve the physical and logical size for touch devices */
1138 error = wacom_retrieve_hid_descriptor(intf, features);
1139 if (error)
1140 goto fail3;
1141
1142 /*
1143 * Intuos5 has no useful data about its touch interface in its
1144 * HID descriptor. If this is the touch interface (wMaxPacketSize
1145 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1146 */
1147 if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1148 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1149 features->device_type = BTN_TOOL_FINGER;
1150 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1151
1152 features->x_phy =
1153 (features->x_max * 100) / features->x_resolution;
1154 features->y_phy =
1155 (features->y_max * 100) / features->y_resolution;
1156
1157 features->x_max = 4096;
1158 features->y_max = 4096;
1159 } else {
1160 features->device_type = BTN_TOOL_PEN;
1161 }
1162 }
1163
1164 wacom_setup_device_quirks(features);
1165
1166 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1167
1168 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1169 /* Append the device type to the name */
1170 strlcat(wacom_wac->name,
1171 features->device_type == BTN_TOOL_PEN ?
1172 " Pen" : " Finger",
1173 sizeof(wacom_wac->name));
1174
1175 error = wacom_add_shared_data(wacom_wac, dev);
1176 if (error)
1177 goto fail3;
1178 }
1179
1180 usb_fill_int_urb(wacom->irq, dev,
1181 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1182 wacom_wac->data, features->pktlen,
1183 wacom_sys_irq, wacom, endpoint->bInterval);
1184 wacom->irq->transfer_dma = wacom->data_dma;
1185 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1186
1187 error = wacom_initialize_leds(wacom);
1188 if (error)
1189 goto fail4;
1190
1191 error = wacom_initialize_battery(wacom);
1192 if (error)
1193 goto fail5;
1194
1195 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1196 error = wacom_register_input(wacom);
1197 if (error)
1198 goto fail6;
1199 }
1200
1201 /* Note that if query fails it is not a hard failure */
1202 wacom_query_tablet_data(intf, features);
1203
1204 usb_set_intfdata(intf, wacom);
1205
1206 if (features->quirks & WACOM_QUIRK_MONITOR) {
1207 if (usb_submit_urb(wacom->irq, GFP_KERNEL))
1208 goto fail5;
1209 }
1210
1211 return 0;
1212
1213 fail6: wacom_destroy_battery(wacom);
1214 fail5: wacom_destroy_leds(wacom);
1215 fail4: wacom_remove_shared_data(wacom_wac);
1216 fail3: usb_free_urb(wacom->irq);
1217 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1218 fail1: kfree(wacom);
1219 return error;
1220 }
1221
1222 static void wacom_disconnect(struct usb_interface *intf)
1223 {
1224 struct wacom *wacom = usb_get_intfdata(intf);
1225
1226 usb_set_intfdata(intf, NULL);
1227
1228 usb_kill_urb(wacom->irq);
1229 cancel_work_sync(&wacom->work);
1230 if (wacom->wacom_wac.input)
1231 input_unregister_device(wacom->wacom_wac.input);
1232 wacom_destroy_battery(wacom);
1233 wacom_destroy_leds(wacom);
1234 usb_free_urb(wacom->irq);
1235 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1236 wacom->wacom_wac.data, wacom->data_dma);
1237 wacom_remove_shared_data(&wacom->wacom_wac);
1238 kfree(wacom);
1239 }
1240
1241 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1242 {
1243 struct wacom *wacom = usb_get_intfdata(intf);
1244
1245 mutex_lock(&wacom->lock);
1246 usb_kill_urb(wacom->irq);
1247 mutex_unlock(&wacom->lock);
1248
1249 return 0;
1250 }
1251
1252 static int wacom_resume(struct usb_interface *intf)
1253 {
1254 struct wacom *wacom = usb_get_intfdata(intf);
1255 struct wacom_features *features = &wacom->wacom_wac.features;
1256 int rv = 0;
1257
1258 mutex_lock(&wacom->lock);
1259
1260 /* switch to wacom mode first */
1261 wacom_query_tablet_data(intf, features);
1262 wacom_led_control(wacom);
1263
1264 if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
1265 && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1266 rv = -EIO;
1267
1268 mutex_unlock(&wacom->lock);
1269
1270 return rv;
1271 }
1272
1273 static int wacom_reset_resume(struct usb_interface *intf)
1274 {
1275 return wacom_resume(intf);
1276 }
1277
1278 static struct usb_driver wacom_driver = {
1279 .name = "wacom",
1280 .id_table = wacom_ids,
1281 .probe = wacom_probe,
1282 .disconnect = wacom_disconnect,
1283 .suspend = wacom_suspend,
1284 .resume = wacom_resume,
1285 .reset_resume = wacom_reset_resume,
1286 .supports_autosuspend = 1,
1287 };
1288
1289 module_usb_driver(wacom_driver);
Linux kernel - Deliverables
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