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Merge tag 'for-3.7' of git://openrisc.net/jonas/linux
[GitHub/mt8127/android_kernel_alcatel_ttab.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 * Calculate the resolution of the X or Y axis, given appropriate HID data.
176 * This function is little more than hidinput_calc_abs_res stripped down.
177 */
178 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
179 unsigned char unit, unsigned char exponent)
180 {
181 int prev, unit_exponent;
182
183 /* Check if the extents are sane */
184 if (logical_extents <= 0 || physical_extents <= 0)
185 return 0;
186
187 /* Get signed value of nybble-sized twos-compliment exponent */
188 unit_exponent = exponent;
189 if (unit_exponent > 7)
190 unit_exponent -= 16;
191
192 /* Convert physical_extents to millimeters */
193 if (unit == 0x11) { /* If centimeters */
194 unit_exponent += 1;
195 } else if (unit == 0x13) { /* If inches */
196 prev = physical_extents;
197 physical_extents *= 254;
198 if (physical_extents < prev)
199 return 0;
200 unit_exponent -= 1;
201 } else {
202 return 0;
203 }
204
205 /* Apply negative unit exponent */
206 for (; unit_exponent < 0; unit_exponent++) {
207 prev = logical_extents;
208 logical_extents *= 10;
209 if (logical_extents < prev)
210 return 0;
211 }
212 /* Apply positive unit exponent */
213 for (; unit_exponent > 0; unit_exponent--) {
214 prev = physical_extents;
215 physical_extents *= 10;
216 if (physical_extents < prev)
217 return 0;
218 }
219
220 /* Calculate resolution */
221 return logical_extents / physical_extents;
222 }
223
224 /*
225 * The physical dimension specified by the HID descriptor is likely not in
226 * the "100th of a mm" units expected by wacom_calculate_touch_res. This
227 * function adjusts the value of [xy]_phy based on the unit and exponent
228 * provided by the HID descriptor. If an error occurs durring conversion
229 * (e.g. from the unit being left unspecified) [xy]_phy is not modified.
230 */
231 static void wacom_fix_phy_from_hid(struct wacom_features *features)
232 {
233 int xres = wacom_calc_hid_res(features->x_max, features->x_phy,
234 features->unit, features->unitExpo);
235 int yres = wacom_calc_hid_res(features->y_max, features->y_phy,
236 features->unit, features->unitExpo);
237
238 if (xres > 0 && yres > 0) {
239 features->x_phy = (100 * features->x_max) / xres;
240 features->y_phy = (100 * features->y_max) / yres;
241 }
242 }
243
244 /*
245 * Static values for max X/Y and resolution of Pen interface is stored in
246 * features. This mean physical size of active area can be computed.
247 * This is useful to do when Pen and Touch have same active area of tablet.
248 * This means for Touch device, we only need to find max X/Y value and we
249 * have enough information to compute resolution of touch.
250 */
251 static void wacom_set_phy_from_res(struct wacom_features *features)
252 {
253 features->x_phy = (features->x_max * 100) / features->x_resolution;
254 features->y_phy = (features->y_max * 100) / features->y_resolution;
255 }
256
257 static int wacom_parse_logical_collection(unsigned char *report,
258 struct wacom_features *features)
259 {
260 int length = 0;
261
262 if (features->type == BAMBOO_PT) {
263
264 /* Logical collection is only used by 3rd gen Bamboo Touch */
265 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
266 features->device_type = BTN_TOOL_FINGER;
267
268 wacom_set_phy_from_res(features);
269
270 features->x_max = features->y_max =
271 get_unaligned_le16(&report[10]);
272
273 length = 11;
274 }
275 return length;
276 }
277
278 static void wacom_retrieve_report_data(struct usb_interface *intf,
279 struct wacom_features *features)
280 {
281 int result = 0;
282 unsigned char *rep_data;
283
284 rep_data = kmalloc(2, GFP_KERNEL);
285 if (rep_data) {
286
287 rep_data[0] = 12;
288 result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
289 rep_data[0], rep_data, 2,
290 WAC_MSG_RETRIES);
291
292 if (result >= 0 && rep_data[1] > 2)
293 features->touch_max = rep_data[1];
294
295 kfree(rep_data);
296 }
297 }
298
299 /*
300 * Interface Descriptor of wacom devices can be incomplete and
301 * inconsistent so wacom_features table is used to store stylus
302 * device's packet lengths, various maximum values, and tablet
303 * resolution based on product ID's.
304 *
305 * For devices that contain 2 interfaces, wacom_features table is
306 * inaccurate for the touch interface. Since the Interface Descriptor
307 * for touch interfaces has pretty complete data, this function exists
308 * to query tablet for this missing information instead of hard coding in
309 * an additional table.
310 *
311 * A typical Interface Descriptor for a stylus will contain a
312 * boot mouse application collection that is not of interest and this
313 * function will ignore it.
314 *
315 * It also contains a digitizer application collection that also is not
316 * of interest since any information it contains would be duplicate
317 * of what is in wacom_features. Usually it defines a report of an array
318 * of bytes that could be used as max length of the stylus packet returned.
319 * If it happens to define a Digitizer-Stylus Physical Collection then
320 * the X and Y logical values contain valid data but it is ignored.
321 *
322 * A typical Interface Descriptor for a touch interface will contain a
323 * Digitizer-Finger Physical Collection which will define both logical
324 * X/Y maximum as well as the physical size of tablet. Since touch
325 * interfaces haven't supported pressure or distance, this is enough
326 * information to override invalid values in the wacom_features table.
327 *
328 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
329 * Collection. Instead they define a Logical Collection with a single
330 * Logical Maximum for both X and Y.
331 *
332 * Intuos5 touch interface does not contain useful data. We deal with
333 * this after returning from this function.
334 */
335 static int wacom_parse_hid(struct usb_interface *intf,
336 struct hid_descriptor *hid_desc,
337 struct wacom_features *features)
338 {
339 struct usb_device *dev = interface_to_usbdev(intf);
340 char limit = 0;
341 /* result has to be defined as int for some devices */
342 int result = 0;
343 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
344 unsigned char *report;
345
346 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
347 if (!report)
348 return -ENOMEM;
349
350 /* retrive report descriptors */
351 do {
352 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
353 USB_REQ_GET_DESCRIPTOR,
354 USB_RECIP_INTERFACE | USB_DIR_IN,
355 HID_DEVICET_REPORT << 8,
356 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
357 report,
358 hid_desc->wDescriptorLength,
359 5000); /* 5 secs */
360 } while (result < 0 && limit++ < WAC_MSG_RETRIES);
361
362 /* No need to parse the Descriptor. It isn't an error though */
363 if (result < 0)
364 goto out;
365
366 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
367
368 switch (report[i]) {
369 case HID_USAGE_PAGE:
370 switch (report[i + 1]) {
371 case HID_USAGE_PAGE_DIGITIZER:
372 usage = WCM_DIGITIZER;
373 i++;
374 break;
375
376 case HID_USAGE_PAGE_DESKTOP:
377 usage = WCM_DESKTOP;
378 i++;
379 break;
380 }
381 break;
382
383 case HID_USAGE:
384 switch (report[i + 1]) {
385 case HID_USAGE_X:
386 if (usage == WCM_DESKTOP) {
387 if (finger) {
388 features->device_type = BTN_TOOL_FINGER;
389 if (features->type == TABLETPC2FG) {
390 /* need to reset back */
391 features->pktlen = WACOM_PKGLEN_TPC2FG;
392 }
393
394 if (features->type == MTSCREEN)
395 features->pktlen = WACOM_PKGLEN_MTOUCH;
396
397 if (features->type == BAMBOO_PT) {
398 /* need to reset back */
399 features->pktlen = WACOM_PKGLEN_BBTOUCH;
400 features->x_phy =
401 get_unaligned_le16(&report[i + 5]);
402 features->x_max =
403 get_unaligned_le16(&report[i + 8]);
404 i += 15;
405 } else {
406 features->x_max =
407 get_unaligned_le16(&report[i + 3]);
408 features->x_phy =
409 get_unaligned_le16(&report[i + 6]);
410 features->unit = report[i + 9];
411 features->unitExpo = report[i + 11];
412 i += 12;
413 }
414 } else if (pen) {
415 /* penabled only accepts exact bytes of data */
416 if (features->type == TABLETPC2FG)
417 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
418 features->device_type = BTN_TOOL_PEN;
419 features->x_max =
420 get_unaligned_le16(&report[i + 3]);
421 i += 4;
422 }
423 }
424 break;
425
426 case HID_USAGE_Y:
427 if (usage == WCM_DESKTOP) {
428 if (finger) {
429 int type = features->type;
430
431 if (type == TABLETPC2FG || type == MTSCREEN) {
432 features->y_max =
433 get_unaligned_le16(&report[i + 3]);
434 features->y_phy =
435 get_unaligned_le16(&report[i + 6]);
436 i += 7;
437 } else if (type == BAMBOO_PT) {
438 features->y_phy =
439 get_unaligned_le16(&report[i + 3]);
440 features->y_max =
441 get_unaligned_le16(&report[i + 6]);
442 i += 12;
443 } else {
444 features->y_max =
445 features->x_max;
446 features->y_phy =
447 get_unaligned_le16(&report[i + 3]);
448 i += 4;
449 }
450 } else if (pen) {
451 features->y_max =
452 get_unaligned_le16(&report[i + 3]);
453 i += 4;
454 }
455 }
456 break;
457
458 case HID_USAGE_FINGER:
459 finger = 1;
460 i++;
461 break;
462
463 /*
464 * Requiring Stylus Usage will ignore boot mouse
465 * X/Y values and some cases of invalid Digitizer X/Y
466 * values commonly reported.
467 */
468 case HID_USAGE_STYLUS:
469 pen = 1;
470 i++;
471 break;
472
473 case HID_USAGE_CONTACTMAX:
474 /* leave touch_max as is if predefined */
475 if (!features->touch_max)
476 wacom_retrieve_report_data(intf, features);
477 i++;
478 break;
479 }
480 break;
481
482 case HID_COLLECTION_END:
483 /* reset UsagePage and Finger */
484 finger = usage = 0;
485 break;
486
487 case HID_COLLECTION:
488 i++;
489 switch (report[i]) {
490 case HID_COLLECTION_LOGICAL:
491 i += wacom_parse_logical_collection(&report[i],
492 features);
493 break;
494 }
495 break;
496 }
497 }
498
499 out:
500 result = 0;
501 kfree(report);
502 return result;
503 }
504
505 static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
506 {
507 unsigned char *rep_data;
508 int error = -ENOMEM, limit = 0;
509
510 rep_data = kzalloc(length, GFP_KERNEL);
511 if (!rep_data)
512 return error;
513
514 rep_data[0] = report_id;
515 rep_data[1] = mode;
516
517 do {
518 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
519 report_id, rep_data, length, 1);
520 if (error >= 0)
521 error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
522 report_id, rep_data, length, 1);
523 } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
524
525 kfree(rep_data);
526
527 return error < 0 ? error : 0;
528 }
529
530 /*
531 * Switch the tablet into its most-capable mode. Wacom tablets are
532 * typically configured to power-up in a mode which sends mouse-like
533 * reports to the OS. To get absolute position, pressure data, etc.
534 * from the tablet, it is necessary to switch the tablet out of this
535 * mode and into one which sends the full range of tablet data.
536 */
537 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
538 {
539 if (features->device_type == BTN_TOOL_FINGER) {
540 if (features->type > TABLETPC) {
541 /* MT Tablet PC touch */
542 return wacom_set_device_mode(intf, 3, 4, 4);
543 }
544 } else if (features->device_type == BTN_TOOL_PEN) {
545 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
546 return wacom_set_device_mode(intf, 2, 2, 2);
547 }
548 }
549
550 return 0;
551 }
552
553 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
554 struct wacom_features *features)
555 {
556 int error = 0;
557 struct usb_host_interface *interface = intf->cur_altsetting;
558 struct hid_descriptor *hid_desc;
559
560 /* default features */
561 features->device_type = BTN_TOOL_PEN;
562 features->x_fuzz = 4;
563 features->y_fuzz = 4;
564 features->pressure_fuzz = 0;
565 features->distance_fuzz = 0;
566
567 /*
568 * The wireless device HID is basic and layout conflicts with
569 * other tablets (monitor and touch interface can look like pen).
570 * Skip the query for this type and modify defaults based on
571 * interface number.
572 */
573 if (features->type == WIRELESS) {
574 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
575 features->device_type = 0;
576 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
577 features->device_type = BTN_TOOL_FINGER;
578 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
579 }
580 }
581
582 /* only devices that support touch need to retrieve the info */
583 if (features->type < BAMBOO_PT) {
584 goto out;
585 }
586
587 error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
588 if (error) {
589 error = usb_get_extra_descriptor(&interface->endpoint[0],
590 HID_DEVICET_REPORT, &hid_desc);
591 if (error) {
592 dev_err(&intf->dev,
593 "can not retrieve extra class descriptor\n");
594 goto out;
595 }
596 }
597 error = wacom_parse_hid(intf, hid_desc, features);
598 if (error)
599 goto out;
600 wacom_fix_phy_from_hid(features);
601
602 out:
603 return error;
604 }
605
606 struct wacom_usbdev_data {
607 struct list_head list;
608 struct kref kref;
609 struct usb_device *dev;
610 struct wacom_shared shared;
611 };
612
613 static LIST_HEAD(wacom_udev_list);
614 static DEFINE_MUTEX(wacom_udev_list_lock);
615
616 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
617 {
618 struct wacom_usbdev_data *data;
619
620 list_for_each_entry(data, &wacom_udev_list, list) {
621 if (data->dev == dev) {
622 kref_get(&data->kref);
623 return data;
624 }
625 }
626
627 return NULL;
628 }
629
630 static int wacom_add_shared_data(struct wacom_wac *wacom,
631 struct usb_device *dev)
632 {
633 struct wacom_usbdev_data *data;
634 int retval = 0;
635
636 mutex_lock(&wacom_udev_list_lock);
637
638 data = wacom_get_usbdev_data(dev);
639 if (!data) {
640 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
641 if (!data) {
642 retval = -ENOMEM;
643 goto out;
644 }
645
646 kref_init(&data->kref);
647 data->dev = dev;
648 list_add_tail(&data->list, &wacom_udev_list);
649 }
650
651 wacom->shared = &data->shared;
652
653 out:
654 mutex_unlock(&wacom_udev_list_lock);
655 return retval;
656 }
657
658 static void wacom_release_shared_data(struct kref *kref)
659 {
660 struct wacom_usbdev_data *data =
661 container_of(kref, struct wacom_usbdev_data, kref);
662
663 mutex_lock(&wacom_udev_list_lock);
664 list_del(&data->list);
665 mutex_unlock(&wacom_udev_list_lock);
666
667 kfree(data);
668 }
669
670 static void wacom_remove_shared_data(struct wacom_wac *wacom)
671 {
672 struct wacom_usbdev_data *data;
673
674 if (wacom->shared) {
675 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
676 kref_put(&data->kref, wacom_release_shared_data);
677 wacom->shared = NULL;
678 }
679 }
680
681 static int wacom_led_control(struct wacom *wacom)
682 {
683 unsigned char *buf;
684 int retval;
685
686 buf = kzalloc(9, GFP_KERNEL);
687 if (!buf)
688 return -ENOMEM;
689
690 if (wacom->wacom_wac.features.type >= INTUOS5S &&
691 wacom->wacom_wac.features.type <= INTUOS5L) {
692 /*
693 * Touch Ring and crop mark LED luminance may take on
694 * one of four values:
695 * 0 = Low; 1 = Medium; 2 = High; 3 = Off
696 */
697 int ring_led = wacom->led.select[0] & 0x03;
698 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
699 int crop_lum = 0;
700
701 buf[0] = WAC_CMD_LED_CONTROL;
702 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
703 }
704 else {
705 int led = wacom->led.select[0] | 0x4;
706
707 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
708 wacom->wacom_wac.features.type == WACOM_24HD)
709 led |= (wacom->led.select[1] << 4) | 0x40;
710
711 buf[0] = WAC_CMD_LED_CONTROL;
712 buf[1] = led;
713 buf[2] = wacom->led.llv;
714 buf[3] = wacom->led.hlv;
715 buf[4] = wacom->led.img_lum;
716 }
717
718 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
719 buf, 9, WAC_CMD_RETRIES);
720 kfree(buf);
721
722 return retval;
723 }
724
725 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
726 {
727 unsigned char *buf;
728 int i, retval;
729
730 buf = kzalloc(259, GFP_KERNEL);
731 if (!buf)
732 return -ENOMEM;
733
734 /* Send 'start' command */
735 buf[0] = WAC_CMD_ICON_START;
736 buf[1] = 1;
737 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
738 buf, 2, WAC_CMD_RETRIES);
739 if (retval < 0)
740 goto out;
741
742 buf[0] = WAC_CMD_ICON_XFER;
743 buf[1] = button_id & 0x07;
744 for (i = 0; i < 4; i++) {
745 buf[2] = i;
746 memcpy(buf + 3, img + i * 256, 256);
747
748 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
749 buf, 259, WAC_CMD_RETRIES);
750 if (retval < 0)
751 break;
752 }
753
754 /* Send 'stop' */
755 buf[0] = WAC_CMD_ICON_START;
756 buf[1] = 0;
757 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
758 buf, 2, WAC_CMD_RETRIES);
759
760 out:
761 kfree(buf);
762 return retval;
763 }
764
765 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
766 const char *buf, size_t count)
767 {
768 struct wacom *wacom = dev_get_drvdata(dev);
769 unsigned int id;
770 int err;
771
772 err = kstrtouint(buf, 10, &id);
773 if (err)
774 return err;
775
776 mutex_lock(&wacom->lock);
777
778 wacom->led.select[set_id] = id & 0x3;
779 err = wacom_led_control(wacom);
780
781 mutex_unlock(&wacom->lock);
782
783 return err < 0 ? err : count;
784 }
785
786 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
787 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
788 struct device_attribute *attr, const char *buf, size_t count) \
789 { \
790 return wacom_led_select_store(dev, SET_ID, buf, count); \
791 } \
792 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
793 struct device_attribute *attr, char *buf) \
794 { \
795 struct wacom *wacom = dev_get_drvdata(dev); \
796 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
797 } \
798 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
799 wacom_led##SET_ID##_select_show, \
800 wacom_led##SET_ID##_select_store)
801
802 DEVICE_LED_SELECT_ATTR(0);
803 DEVICE_LED_SELECT_ATTR(1);
804
805 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
806 const char *buf, size_t count)
807 {
808 unsigned int value;
809 int err;
810
811 err = kstrtouint(buf, 10, &value);
812 if (err)
813 return err;
814
815 mutex_lock(&wacom->lock);
816
817 *dest = value & 0x7f;
818 err = wacom_led_control(wacom);
819
820 mutex_unlock(&wacom->lock);
821
822 return err < 0 ? err : count;
823 }
824
825 #define DEVICE_LUMINANCE_ATTR(name, field) \
826 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
827 struct device_attribute *attr, const char *buf, size_t count) \
828 { \
829 struct wacom *wacom = dev_get_drvdata(dev); \
830 \
831 return wacom_luminance_store(wacom, &wacom->led.field, \
832 buf, count); \
833 } \
834 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
835 NULL, wacom_##name##_luminance_store)
836
837 DEVICE_LUMINANCE_ATTR(status0, llv);
838 DEVICE_LUMINANCE_ATTR(status1, hlv);
839 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
840
841 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
842 const char *buf, size_t count)
843 {
844 struct wacom *wacom = dev_get_drvdata(dev);
845 int err;
846
847 if (count != 1024)
848 return -EINVAL;
849
850 mutex_lock(&wacom->lock);
851
852 err = wacom_led_putimage(wacom, button_id, buf);
853
854 mutex_unlock(&wacom->lock);
855
856 return err < 0 ? err : count;
857 }
858
859 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
860 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
861 struct device_attribute *attr, const char *buf, size_t count) \
862 { \
863 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
864 } \
865 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
866 NULL, wacom_btnimg##BUTTON_ID##_store)
867
868 DEVICE_BTNIMG_ATTR(0);
869 DEVICE_BTNIMG_ATTR(1);
870 DEVICE_BTNIMG_ATTR(2);
871 DEVICE_BTNIMG_ATTR(3);
872 DEVICE_BTNIMG_ATTR(4);
873 DEVICE_BTNIMG_ATTR(5);
874 DEVICE_BTNIMG_ATTR(6);
875 DEVICE_BTNIMG_ATTR(7);
876
877 static struct attribute *cintiq_led_attrs[] = {
878 &dev_attr_status_led0_select.attr,
879 &dev_attr_status_led1_select.attr,
880 NULL
881 };
882
883 static struct attribute_group cintiq_led_attr_group = {
884 .name = "wacom_led",
885 .attrs = cintiq_led_attrs,
886 };
887
888 static struct attribute *intuos4_led_attrs[] = {
889 &dev_attr_status0_luminance.attr,
890 &dev_attr_status1_luminance.attr,
891 &dev_attr_status_led0_select.attr,
892 &dev_attr_buttons_luminance.attr,
893 &dev_attr_button0_rawimg.attr,
894 &dev_attr_button1_rawimg.attr,
895 &dev_attr_button2_rawimg.attr,
896 &dev_attr_button3_rawimg.attr,
897 &dev_attr_button4_rawimg.attr,
898 &dev_attr_button5_rawimg.attr,
899 &dev_attr_button6_rawimg.attr,
900 &dev_attr_button7_rawimg.attr,
901 NULL
902 };
903
904 static struct attribute_group intuos4_led_attr_group = {
905 .name = "wacom_led",
906 .attrs = intuos4_led_attrs,
907 };
908
909 static struct attribute *intuos5_led_attrs[] = {
910 &dev_attr_status0_luminance.attr,
911 &dev_attr_status_led0_select.attr,
912 NULL
913 };
914
915 static struct attribute_group intuos5_led_attr_group = {
916 .name = "wacom_led",
917 .attrs = intuos5_led_attrs,
918 };
919
920 static int wacom_initialize_leds(struct wacom *wacom)
921 {
922 int error;
923
924 /* Initialize default values */
925 switch (wacom->wacom_wac.features.type) {
926 case INTUOS4S:
927 case INTUOS4:
928 case INTUOS4L:
929 wacom->led.select[0] = 0;
930 wacom->led.select[1] = 0;
931 wacom->led.llv = 10;
932 wacom->led.hlv = 20;
933 wacom->led.img_lum = 10;
934 error = sysfs_create_group(&wacom->intf->dev.kobj,
935 &intuos4_led_attr_group);
936 break;
937
938 case WACOM_24HD:
939 case WACOM_21UX2:
940 wacom->led.select[0] = 0;
941 wacom->led.select[1] = 0;
942 wacom->led.llv = 0;
943 wacom->led.hlv = 0;
944 wacom->led.img_lum = 0;
945
946 error = sysfs_create_group(&wacom->intf->dev.kobj,
947 &cintiq_led_attr_group);
948 break;
949
950 case INTUOS5S:
951 case INTUOS5:
952 case INTUOS5L:
953 wacom->led.select[0] = 0;
954 wacom->led.select[1] = 0;
955 wacom->led.llv = 32;
956 wacom->led.hlv = 0;
957 wacom->led.img_lum = 0;
958
959 error = sysfs_create_group(&wacom->intf->dev.kobj,
960 &intuos5_led_attr_group);
961 break;
962
963 default:
964 return 0;
965 }
966
967 if (error) {
968 dev_err(&wacom->intf->dev,
969 "cannot create sysfs group err: %d\n", error);
970 return error;
971 }
972 wacom_led_control(wacom);
973
974 return 0;
975 }
976
977 static void wacom_destroy_leds(struct wacom *wacom)
978 {
979 switch (wacom->wacom_wac.features.type) {
980 case INTUOS4S:
981 case INTUOS4:
982 case INTUOS4L:
983 sysfs_remove_group(&wacom->intf->dev.kobj,
984 &intuos4_led_attr_group);
985 break;
986
987 case WACOM_24HD:
988 case WACOM_21UX2:
989 sysfs_remove_group(&wacom->intf->dev.kobj,
990 &cintiq_led_attr_group);
991 break;
992
993 case INTUOS5S:
994 case INTUOS5:
995 case INTUOS5L:
996 sysfs_remove_group(&wacom->intf->dev.kobj,
997 &intuos5_led_attr_group);
998 break;
999 }
1000 }
1001
1002 static enum power_supply_property wacom_battery_props[] = {
1003 POWER_SUPPLY_PROP_CAPACITY
1004 };
1005
1006 static int wacom_battery_get_property(struct power_supply *psy,
1007 enum power_supply_property psp,
1008 union power_supply_propval *val)
1009 {
1010 struct wacom *wacom = container_of(psy, struct wacom, battery);
1011 int ret = 0;
1012
1013 switch (psp) {
1014 case POWER_SUPPLY_PROP_CAPACITY:
1015 val->intval =
1016 wacom->wacom_wac.battery_capacity * 100 / 31;
1017 break;
1018 default:
1019 ret = -EINVAL;
1020 break;
1021 }
1022
1023 return ret;
1024 }
1025
1026 static int wacom_initialize_battery(struct wacom *wacom)
1027 {
1028 int error = 0;
1029
1030 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1031 wacom->battery.properties = wacom_battery_props;
1032 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1033 wacom->battery.get_property = wacom_battery_get_property;
1034 wacom->battery.name = "wacom_battery";
1035 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1036 wacom->battery.use_for_apm = 0;
1037
1038 error = power_supply_register(&wacom->usbdev->dev,
1039 &wacom->battery);
1040
1041 if (!error)
1042 power_supply_powers(&wacom->battery,
1043 &wacom->usbdev->dev);
1044 }
1045
1046 return error;
1047 }
1048
1049 static void wacom_destroy_battery(struct wacom *wacom)
1050 {
1051 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1052 wacom->battery.dev) {
1053 power_supply_unregister(&wacom->battery);
1054 wacom->battery.dev = NULL;
1055 }
1056 }
1057
1058 static int wacom_register_input(struct wacom *wacom)
1059 {
1060 struct input_dev *input_dev;
1061 struct usb_interface *intf = wacom->intf;
1062 struct usb_device *dev = interface_to_usbdev(intf);
1063 struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1064 int error;
1065
1066 input_dev = input_allocate_device();
1067 if (!input_dev) {
1068 error = -ENOMEM;
1069 goto fail1;
1070 }
1071
1072 input_dev->name = wacom_wac->name;
1073 input_dev->dev.parent = &intf->dev;
1074 input_dev->open = wacom_open;
1075 input_dev->close = wacom_close;
1076 usb_to_input_id(dev, &input_dev->id);
1077 input_set_drvdata(input_dev, wacom);
1078
1079 wacom_wac->input = input_dev;
1080 error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1081 if (error)
1082 goto fail1;
1083
1084 error = input_register_device(input_dev);
1085 if (error)
1086 goto fail2;
1087
1088 return 0;
1089
1090 fail2:
1091 input_free_device(input_dev);
1092 wacom_wac->input = NULL;
1093 fail1:
1094 return error;
1095 }
1096
1097 static void wacom_wireless_work(struct work_struct *work)
1098 {
1099 struct wacom *wacom = container_of(work, struct wacom, work);
1100 struct usb_device *usbdev = wacom->usbdev;
1101 struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1102 struct wacom *wacom1, *wacom2;
1103 struct wacom_wac *wacom_wac1, *wacom_wac2;
1104 int error;
1105
1106 /*
1107 * Regardless if this is a disconnect or a new tablet,
1108 * remove any existing input and battery devices.
1109 */
1110
1111 wacom_destroy_battery(wacom);
1112
1113 /* Stylus interface */
1114 wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1115 wacom_wac1 = &(wacom1->wacom_wac);
1116 if (wacom_wac1->input)
1117 input_unregister_device(wacom_wac1->input);
1118 wacom_wac1->input = NULL;
1119
1120 /* Touch interface */
1121 wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1122 wacom_wac2 = &(wacom2->wacom_wac);
1123 if (wacom_wac2->input)
1124 input_unregister_device(wacom_wac2->input);
1125 wacom_wac2->input = NULL;
1126
1127 if (wacom_wac->pid == 0) {
1128 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1129 } else {
1130 const struct usb_device_id *id = wacom_ids;
1131
1132 dev_info(&wacom->intf->dev,
1133 "wireless tablet connected with PID %x\n",
1134 wacom_wac->pid);
1135
1136 while (id->match_flags) {
1137 if (id->idVendor == USB_VENDOR_ID_WACOM &&
1138 id->idProduct == wacom_wac->pid)
1139 break;
1140 id++;
1141 }
1142
1143 if (!id->match_flags) {
1144 dev_info(&wacom->intf->dev,
1145 "ignoring unknown PID.\n");
1146 return;
1147 }
1148
1149 /* Stylus interface */
1150 wacom_wac1->features =
1151 *((struct wacom_features *)id->driver_info);
1152 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1153 error = wacom_register_input(wacom1);
1154 if (error)
1155 goto fail1;
1156
1157 /* Touch interface */
1158 wacom_wac2->features =
1159 *((struct wacom_features *)id->driver_info);
1160 wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1161 wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1162 wacom_set_phy_from_res(&wacom_wac2->features);
1163 wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1164 error = wacom_register_input(wacom2);
1165 if (error)
1166 goto fail2;
1167
1168 error = wacom_initialize_battery(wacom);
1169 if (error)
1170 goto fail3;
1171 }
1172
1173 return;
1174
1175 fail3:
1176 input_unregister_device(wacom_wac2->input);
1177 wacom_wac2->input = NULL;
1178 fail2:
1179 input_unregister_device(wacom_wac1->input);
1180 wacom_wac1->input = NULL;
1181 fail1:
1182 return;
1183 }
1184
1185 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1186 {
1187 struct usb_device *dev = interface_to_usbdev(intf);
1188 struct usb_endpoint_descriptor *endpoint;
1189 struct wacom *wacom;
1190 struct wacom_wac *wacom_wac;
1191 struct wacom_features *features;
1192 int error;
1193
1194 if (!id->driver_info)
1195 return -EINVAL;
1196
1197 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1198 if (!wacom)
1199 return -ENOMEM;
1200
1201 wacom_wac = &wacom->wacom_wac;
1202 wacom_wac->features = *((struct wacom_features *)id->driver_info);
1203 features = &wacom_wac->features;
1204 if (features->pktlen > WACOM_PKGLEN_MAX) {
1205 error = -EINVAL;
1206 goto fail1;
1207 }
1208
1209 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1210 GFP_KERNEL, &wacom->data_dma);
1211 if (!wacom_wac->data) {
1212 error = -ENOMEM;
1213 goto fail1;
1214 }
1215
1216 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1217 if (!wacom->irq) {
1218 error = -ENOMEM;
1219 goto fail2;
1220 }
1221
1222 wacom->usbdev = dev;
1223 wacom->intf = intf;
1224 mutex_init(&wacom->lock);
1225 INIT_WORK(&wacom->work, wacom_wireless_work);
1226 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1227 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1228
1229 endpoint = &intf->cur_altsetting->endpoint[0].desc;
1230
1231 /* Retrieve the physical and logical size for touch devices */
1232 error = wacom_retrieve_hid_descriptor(intf, features);
1233 if (error)
1234 goto fail3;
1235
1236 /*
1237 * Intuos5 has no useful data about its touch interface in its
1238 * HID descriptor. If this is the touch interface (wMaxPacketSize
1239 * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1240 */
1241 if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1242 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1243 features->device_type = BTN_TOOL_FINGER;
1244 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1245
1246 wacom_set_phy_from_res(features);
1247
1248 features->x_max = 4096;
1249 features->y_max = 4096;
1250 } else {
1251 features->device_type = BTN_TOOL_PEN;
1252 }
1253 }
1254
1255 wacom_setup_device_quirks(features);
1256
1257 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1258
1259 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1260 /* Append the device type to the name */
1261 strlcat(wacom_wac->name,
1262 features->device_type == BTN_TOOL_PEN ?
1263 " Pen" : " Finger",
1264 sizeof(wacom_wac->name));
1265
1266 error = wacom_add_shared_data(wacom_wac, dev);
1267 if (error)
1268 goto fail3;
1269 }
1270
1271 usb_fill_int_urb(wacom->irq, dev,
1272 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1273 wacom_wac->data, features->pktlen,
1274 wacom_sys_irq, wacom, endpoint->bInterval);
1275 wacom->irq->transfer_dma = wacom->data_dma;
1276 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1277
1278 error = wacom_initialize_leds(wacom);
1279 if (error)
1280 goto fail4;
1281
1282 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1283 error = wacom_register_input(wacom);
1284 if (error)
1285 goto fail5;
1286 }
1287
1288 /* Note that if query fails it is not a hard failure */
1289 wacom_query_tablet_data(intf, features);
1290
1291 usb_set_intfdata(intf, wacom);
1292
1293 if (features->quirks & WACOM_QUIRK_MONITOR) {
1294 if (usb_submit_urb(wacom->irq, GFP_KERNEL))
1295 goto fail5;
1296 }
1297
1298 return 0;
1299
1300 fail5: wacom_destroy_leds(wacom);
1301 fail4: wacom_remove_shared_data(wacom_wac);
1302 fail3: usb_free_urb(wacom->irq);
1303 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1304 fail1: kfree(wacom);
1305 return error;
1306 }
1307
1308 static void wacom_disconnect(struct usb_interface *intf)
1309 {
1310 struct wacom *wacom = usb_get_intfdata(intf);
1311
1312 usb_set_intfdata(intf, NULL);
1313
1314 usb_kill_urb(wacom->irq);
1315 cancel_work_sync(&wacom->work);
1316 if (wacom->wacom_wac.input)
1317 input_unregister_device(wacom->wacom_wac.input);
1318 wacom_destroy_battery(wacom);
1319 wacom_destroy_leds(wacom);
1320 usb_free_urb(wacom->irq);
1321 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1322 wacom->wacom_wac.data, wacom->data_dma);
1323 wacom_remove_shared_data(&wacom->wacom_wac);
1324 kfree(wacom);
1325 }
1326
1327 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1328 {
1329 struct wacom *wacom = usb_get_intfdata(intf);
1330
1331 mutex_lock(&wacom->lock);
1332 usb_kill_urb(wacom->irq);
1333 mutex_unlock(&wacom->lock);
1334
1335 return 0;
1336 }
1337
1338 static int wacom_resume(struct usb_interface *intf)
1339 {
1340 struct wacom *wacom = usb_get_intfdata(intf);
1341 struct wacom_features *features = &wacom->wacom_wac.features;
1342 int rv = 0;
1343
1344 mutex_lock(&wacom->lock);
1345
1346 /* switch to wacom mode first */
1347 wacom_query_tablet_data(intf, features);
1348 wacom_led_control(wacom);
1349
1350 if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
1351 && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1352 rv = -EIO;
1353
1354 mutex_unlock(&wacom->lock);
1355
1356 return rv;
1357 }
1358
1359 static int wacom_reset_resume(struct usb_interface *intf)
1360 {
1361 return wacom_resume(intf);
1362 }
1363
1364 static struct usb_driver wacom_driver = {
1365 .name = "wacom",
1366 .id_table = wacom_ids,
1367 .probe = wacom_probe,
1368 .disconnect = wacom_disconnect,
1369 .suspend = wacom_suspend,
1370 .resume = wacom_resume,
1371 .reset_resume = wacom_reset_resume,
1372 .supports_autosuspend = 1,
1373 };
1374
1375 module_usb_driver(wacom_driver);
kernel source for telekom puls (alcatel/mediatek)