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