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_COLLECTION 0xa1
32 #define HID_COLLECTION_LOGICAL 0x02
33 #define HID_COLLECTION_END 0xc0
34
35 enum {
36 WCM_UNDEFINED = 0,
37 WCM_DESKTOP,
38 WCM_DIGITIZER,
39 };
40
41 struct hid_descriptor {
42 struct usb_descriptor_header header;
43 __le16 bcdHID;
44 u8 bCountryCode;
45 u8 bNumDescriptors;
46 u8 bDescriptorType;
47 __le16 wDescriptorLength;
48 } __attribute__ ((packed));
49
50 /* defines to get/set USB message */
51 #define USB_REQ_GET_REPORT 0x01
52 #define USB_REQ_SET_REPORT 0x09
53
54 #define WAC_HID_FEATURE_REPORT 0x03
55 #define WAC_MSG_RETRIES 5
56
57 #define WAC_CMD_LED_CONTROL 0x20
58 #define WAC_CMD_ICON_START 0x21
59 #define WAC_CMD_ICON_XFER 0x23
60 #define WAC_CMD_RETRIES 10
61
wacom_get_report(struct usb_interface * intf,u8 type,u8 id,void * buf,size_t size,unsigned int retries)62 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
63 void *buf, size_t size, unsigned int retries)
64 {
65 struct usb_device *dev = interface_to_usbdev(intf);
66 int retval;
67
68 do {
69 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
70 USB_REQ_GET_REPORT,
71 USB_DIR_IN | USB_TYPE_CLASS |
72 USB_RECIP_INTERFACE,
73 (type << 8) + id,
74 intf->altsetting[0].desc.bInterfaceNumber,
75 buf, size, 100);
76 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
77
78 return retval;
79 }
80
wacom_set_report(struct usb_interface * intf,u8 type,u8 id,void * buf,size_t size,unsigned int retries)81 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
82 void *buf, size_t size, unsigned int retries)
83 {
84 struct usb_device *dev = interface_to_usbdev(intf);
85 int retval;
86
87 do {
88 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
89 USB_REQ_SET_REPORT,
90 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
91 (type << 8) + id,
92 intf->altsetting[0].desc.bInterfaceNumber,
93 buf, size, 1000);
94 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
95
96 return retval;
97 }
98
wacom_sys_irq(struct urb * urb)99 static void wacom_sys_irq(struct urb *urb)
100 {
101 struct wacom *wacom = urb->context;
102 int retval;
103
104 switch (urb->status) {
105 case 0:
106 /* success */
107 break;
108 case -ECONNRESET:
109 case -ENOENT:
110 case -ESHUTDOWN:
111 /* this urb is terminated, clean up */
112 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
113 return;
114 default:
115 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
116 goto exit;
117 }
118
119 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
120
121 exit:
122 usb_mark_last_busy(wacom->usbdev);
123 retval = usb_submit_urb(urb, GFP_ATOMIC);
124 if (retval)
125 err ("%s - usb_submit_urb failed with result %d",
126 __func__, retval);
127 }
128
wacom_open(struct input_dev * dev)129 static int wacom_open(struct input_dev *dev)
130 {
131 struct wacom *wacom = input_get_drvdata(dev);
132 int retval = 0;
133
134 if (usb_autopm_get_interface(wacom->intf) < 0)
135 return -EIO;
136
137 mutex_lock(&wacom->lock);
138
139 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
140 retval = -EIO;
141 goto out;
142 }
143
144 wacom->open = true;
145 wacom->intf->needs_remote_wakeup = 1;
146
147 out:
148 mutex_unlock(&wacom->lock);
149 usb_autopm_put_interface(wacom->intf);
150 return retval;
151 }
152
wacom_close(struct input_dev * dev)153 static void wacom_close(struct input_dev *dev)
154 {
155 struct wacom *wacom = input_get_drvdata(dev);
156 int autopm_error;
157
158 autopm_error = usb_autopm_get_interface(wacom->intf);
159
160 mutex_lock(&wacom->lock);
161 usb_kill_urb(wacom->irq);
162 wacom->open = false;
163 wacom->intf->needs_remote_wakeup = 0;
164 mutex_unlock(&wacom->lock);
165
166 if (!autopm_error)
167 usb_autopm_put_interface(wacom->intf);
168 }
169
wacom_parse_logical_collection(unsigned char * report,struct wacom_features * features)170 static int wacom_parse_logical_collection(unsigned char *report,
171 struct wacom_features *features)
172 {
173 int length = 0;
174
175 if (features->type == BAMBOO_PT) {
176
177 /* Logical collection is only used by 3rd gen Bamboo Touch */
178 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
179 features->device_type = BTN_TOOL_DOUBLETAP;
180
181 /*
182 * Stylus and Touch have same active area
183 * so compute physical size based on stylus
184 * data before its overwritten.
185 */
186 features->x_phy =
187 (features->x_max * features->x_resolution) / 100;
188 features->y_phy =
189 (features->y_max * features->y_resolution) / 100;
190
191 features->x_max = features->y_max =
192 get_unaligned_le16(&report[10]);
193
194 length = 11;
195 }
196 return length;
197 }
198
199 /*
200 * Interface Descriptor of wacom devices can be incomplete and
201 * inconsistent so wacom_features table is used to store stylus
202 * device's packet lengths, various maximum values, and tablet
203 * resolution based on product ID's.
204 *
205 * For devices that contain 2 interfaces, wacom_features table is
206 * inaccurate for the touch interface. Since the Interface Descriptor
207 * for touch interfaces has pretty complete data, this function exists
208 * to query tablet for this missing information instead of hard coding in
209 * an additional table.
210 *
211 * A typical Interface Descriptor for a stylus will contain a
212 * boot mouse application collection that is not of interest and this
213 * function will ignore it.
214 *
215 * It also contains a digitizer application collection that also is not
216 * of interest since any information it contains would be duplicate
217 * of what is in wacom_features. Usually it defines a report of an array
218 * of bytes that could be used as max length of the stylus packet returned.
219 * If it happens to define a Digitizer-Stylus Physical Collection then
220 * the X and Y logical values contain valid data but it is ignored.
221 *
222 * A typical Interface Descriptor for a touch interface will contain a
223 * Digitizer-Finger Physical Collection which will define both logical
224 * X/Y maximum as well as the physical size of tablet. Since touch
225 * interfaces haven't supported pressure or distance, this is enough
226 * information to override invalid values in the wacom_features table.
227 *
228 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
229 * Collection. Instead they define a Logical Collection with a single
230 * Logical Maximum for both X and Y.
231 */
wacom_parse_hid(struct usb_interface * intf,struct hid_descriptor * hid_desc,struct wacom_features * features)232 static int wacom_parse_hid(struct usb_interface *intf,
233 struct hid_descriptor *hid_desc,
234 struct wacom_features *features)
235 {
236 struct usb_device *dev = interface_to_usbdev(intf);
237 char limit = 0;
238 /* result has to be defined as int for some devices */
239 int result = 0;
240 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
241 unsigned char *report;
242
243 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
244 if (!report)
245 return -ENOMEM;
246
247 /* retrive report descriptors */
248 do {
249 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
250 USB_REQ_GET_DESCRIPTOR,
251 USB_RECIP_INTERFACE | USB_DIR_IN,
252 HID_DEVICET_REPORT << 8,
253 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
254 report,
255 hid_desc->wDescriptorLength,
256 5000); /* 5 secs */
257 } while (result < 0 && limit++ < WAC_MSG_RETRIES);
258
259 /* No need to parse the Descriptor. It isn't an error though */
260 if (result < 0)
261 goto out;
262
263 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
264
265 switch (report[i]) {
266 case HID_USAGE_PAGE:
267 switch (report[i + 1]) {
268 case HID_USAGE_PAGE_DIGITIZER:
269 usage = WCM_DIGITIZER;
270 i++;
271 break;
272
273 case HID_USAGE_PAGE_DESKTOP:
274 usage = WCM_DESKTOP;
275 i++;
276 break;
277 }
278 break;
279
280 case HID_USAGE:
281 switch (report[i + 1]) {
282 case HID_USAGE_X:
283 if (usage == WCM_DESKTOP) {
284 if (finger) {
285 features->device_type = BTN_TOOL_FINGER;
286 if (features->type == TABLETPC2FG) {
287 /* need to reset back */
288 features->pktlen = WACOM_PKGLEN_TPC2FG;
289 features->device_type = BTN_TOOL_DOUBLETAP;
290 }
291 if (features->type == BAMBOO_PT) {
292 /* need to reset back */
293 features->pktlen = WACOM_PKGLEN_BBTOUCH;
294 features->device_type = BTN_TOOL_DOUBLETAP;
295 features->x_phy =
296 get_unaligned_le16(&report[i + 5]);
297 features->x_max =
298 get_unaligned_le16(&report[i + 8]);
299 i += 15;
300 } else {
301 features->x_max =
302 get_unaligned_le16(&report[i + 3]);
303 features->x_phy =
304 get_unaligned_le16(&report[i + 6]);
305 features->unit = report[i + 9];
306 features->unitExpo = report[i + 11];
307 i += 12;
308 }
309 } else if (pen) {
310 /* penabled only accepts exact bytes of data */
311 if (features->type == TABLETPC2FG)
312 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
313 features->device_type = BTN_TOOL_PEN;
314 features->x_max =
315 get_unaligned_le16(&report[i + 3]);
316 i += 4;
317 }
318 }
319 break;
320
321 case HID_USAGE_Y:
322 if (usage == WCM_DESKTOP) {
323 if (finger) {
324 features->device_type = BTN_TOOL_FINGER;
325 if (features->type == TABLETPC2FG) {
326 /* need to reset back */
327 features->pktlen = WACOM_PKGLEN_TPC2FG;
328 features->device_type = BTN_TOOL_DOUBLETAP;
329 features->y_max =
330 get_unaligned_le16(&report[i + 3]);
331 features->y_phy =
332 get_unaligned_le16(&report[i + 6]);
333 i += 7;
334 } else if (features->type == BAMBOO_PT) {
335 /* need to reset back */
336 features->pktlen = WACOM_PKGLEN_BBTOUCH;
337 features->device_type = BTN_TOOL_DOUBLETAP;
338 features->y_phy =
339 get_unaligned_le16(&report[i + 3]);
340 features->y_max =
341 get_unaligned_le16(&report[i + 6]);
342 i += 12;
343 } else {
344 features->y_max =
345 features->x_max;
346 features->y_phy =
347 get_unaligned_le16(&report[i + 3]);
348 i += 4;
349 }
350 } else if (pen) {
351 /* penabled only accepts exact bytes of data */
352 if (features->type == TABLETPC2FG)
353 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
354 features->device_type = BTN_TOOL_PEN;
355 features->y_max =
356 get_unaligned_le16(&report[i + 3]);
357 i += 4;
358 }
359 }
360 break;
361
362 case HID_USAGE_FINGER:
363 finger = 1;
364 i++;
365 break;
366
367 /*
368 * Requiring Stylus Usage will ignore boot mouse
369 * X/Y values and some cases of invalid Digitizer X/Y
370 * values commonly reported.
371 */
372 case HID_USAGE_STYLUS:
373 pen = 1;
374 i++;
375 break;
376 }
377 break;
378
379 case HID_COLLECTION_END:
380 /* reset UsagePage and Finger */
381 finger = usage = 0;
382 break;
383
384 case HID_COLLECTION:
385 i++;
386 switch (report[i]) {
387 case HID_COLLECTION_LOGICAL:
388 i += wacom_parse_logical_collection(&report[i],
389 features);
390 break;
391 }
392 break;
393 }
394 }
395
396 out:
397 result = 0;
398 kfree(report);
399 return result;
400 }
401
wacom_query_tablet_data(struct usb_interface * intf,struct wacom_features * features)402 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
403 {
404 unsigned char *rep_data;
405 int limit = 0, report_id = 2;
406 int error = -ENOMEM;
407
408 rep_data = kmalloc(4, GFP_KERNEL);
409 if (!rep_data)
410 return error;
411
412 /* ask to report tablet data if it is MT Tablet PC or
413 * not a Tablet PC */
414 if (features->type == TABLETPC2FG) {
415 do {
416 rep_data[0] = 3;
417 rep_data[1] = 4;
418 rep_data[2] = 0;
419 rep_data[3] = 0;
420 report_id = 3;
421 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
422 report_id, rep_data, 4, 1);
423 if (error >= 0)
424 error = wacom_get_report(intf,
425 WAC_HID_FEATURE_REPORT,
426 report_id, rep_data, 4, 1);
427 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
428 } else if (features->type != TABLETPC &&
429 features->device_type == BTN_TOOL_PEN) {
430 do {
431 rep_data[0] = 2;
432 rep_data[1] = 2;
433 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
434 report_id, rep_data, 2, 1);
435 if (error >= 0)
436 error = wacom_get_report(intf,
437 WAC_HID_FEATURE_REPORT,
438 report_id, rep_data, 2, 1);
439 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
440 }
441
442 kfree(rep_data);
443
444 return error < 0 ? error : 0;
445 }
446
wacom_retrieve_hid_descriptor(struct usb_interface * intf,struct wacom_features * features)447 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
448 struct wacom_features *features)
449 {
450 int error = 0;
451 struct usb_host_interface *interface = intf->cur_altsetting;
452 struct hid_descriptor *hid_desc;
453
454 /* default features */
455 features->device_type = BTN_TOOL_PEN;
456 features->x_fuzz = 4;
457 features->y_fuzz = 4;
458 features->pressure_fuzz = 0;
459 features->distance_fuzz = 0;
460
461 /* only Tablet PCs and Bamboo P&T need to retrieve the info */
462 if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
463 (features->type != BAMBOO_PT))
464 goto out;
465
466 if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
467 if (usb_get_extra_descriptor(&interface->endpoint[0],
468 HID_DEVICET_REPORT, &hid_desc)) {
469 printk("wacom: can not retrieve extra class descriptor\n");
470 error = 1;
471 goto out;
472 }
473 }
474 error = wacom_parse_hid(intf, hid_desc, features);
475 if (error)
476 goto out;
477
478 out:
479 return error;
480 }
481
482 struct wacom_usbdev_data {
483 struct list_head list;
484 struct kref kref;
485 struct usb_device *dev;
486 struct wacom_shared shared;
487 };
488
489 static LIST_HEAD(wacom_udev_list);
490 static DEFINE_MUTEX(wacom_udev_list_lock);
491
wacom_get_usbdev_data(struct usb_device * dev)492 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
493 {
494 struct wacom_usbdev_data *data;
495
496 list_for_each_entry(data, &wacom_udev_list, list) {
497 if (data->dev == dev) {
498 kref_get(&data->kref);
499 return data;
500 }
501 }
502
503 return NULL;
504 }
505
wacom_add_shared_data(struct wacom_wac * wacom,struct usb_device * dev)506 static int wacom_add_shared_data(struct wacom_wac *wacom,
507 struct usb_device *dev)
508 {
509 struct wacom_usbdev_data *data;
510 int retval = 0;
511
512 mutex_lock(&wacom_udev_list_lock);
513
514 data = wacom_get_usbdev_data(dev);
515 if (!data) {
516 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
517 if (!data) {
518 retval = -ENOMEM;
519 goto out;
520 }
521
522 kref_init(&data->kref);
523 data->dev = dev;
524 list_add_tail(&data->list, &wacom_udev_list);
525 }
526
527 wacom->shared = &data->shared;
528
529 out:
530 mutex_unlock(&wacom_udev_list_lock);
531 return retval;
532 }
533
wacom_release_shared_data(struct kref * kref)534 static void wacom_release_shared_data(struct kref *kref)
535 {
536 struct wacom_usbdev_data *data =
537 container_of(kref, struct wacom_usbdev_data, kref);
538
539 mutex_lock(&wacom_udev_list_lock);
540 list_del(&data->list);
541 mutex_unlock(&wacom_udev_list_lock);
542
543 kfree(data);
544 }
545
wacom_remove_shared_data(struct wacom_wac * wacom)546 static void wacom_remove_shared_data(struct wacom_wac *wacom)
547 {
548 struct wacom_usbdev_data *data;
549
550 if (wacom->shared) {
551 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
552 kref_put(&data->kref, wacom_release_shared_data);
553 wacom->shared = NULL;
554 }
555 }
556
wacom_led_control(struct wacom * wacom)557 static int wacom_led_control(struct wacom *wacom)
558 {
559 unsigned char *buf;
560 int retval, led = 0;
561
562 buf = kzalloc(9, GFP_KERNEL);
563 if (!buf)
564 return -ENOMEM;
565
566 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
567 wacom->wacom_wac.features.type == WACOM_24HD)
568 led = (wacom->led.select[1] << 4) | 0x40;
569
570 led |= wacom->led.select[0] | 0x4;
571
572 buf[0] = WAC_CMD_LED_CONTROL;
573 buf[1] = led;
574 buf[2] = wacom->led.llv;
575 buf[3] = wacom->led.hlv;
576 buf[4] = wacom->led.img_lum;
577
578 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
579 buf, 9, WAC_CMD_RETRIES);
580 kfree(buf);
581
582 return retval;
583 }
584
wacom_led_putimage(struct wacom * wacom,int button_id,const void * img)585 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
586 {
587 unsigned char *buf;
588 int i, retval;
589
590 buf = kzalloc(259, GFP_KERNEL);
591 if (!buf)
592 return -ENOMEM;
593
594 /* Send 'start' command */
595 buf[0] = WAC_CMD_ICON_START;
596 buf[1] = 1;
597 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
598 buf, 2, WAC_CMD_RETRIES);
599 if (retval < 0)
600 goto out;
601
602 buf[0] = WAC_CMD_ICON_XFER;
603 buf[1] = button_id & 0x07;
604 for (i = 0; i < 4; i++) {
605 buf[2] = i;
606 memcpy(buf + 3, img + i * 256, 256);
607
608 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
609 buf, 259, WAC_CMD_RETRIES);
610 if (retval < 0)
611 break;
612 }
613
614 /* Send 'stop' */
615 buf[0] = WAC_CMD_ICON_START;
616 buf[1] = 0;
617 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
618 buf, 2, WAC_CMD_RETRIES);
619
620 out:
621 kfree(buf);
622 return retval;
623 }
624
wacom_led_select_store(struct device * dev,int set_id,const char * buf,size_t count)625 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
626 const char *buf, size_t count)
627 {
628 struct wacom *wacom = dev_get_drvdata(dev);
629 unsigned int id;
630 int err;
631
632 err = kstrtouint(buf, 10, &id);
633 if (err)
634 return err;
635
636 mutex_lock(&wacom->lock);
637
638 wacom->led.select[set_id] = id & 0x3;
639 err = wacom_led_control(wacom);
640
641 mutex_unlock(&wacom->lock);
642
643 return err < 0 ? err : count;
644 }
645
646 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
647 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
648 struct device_attribute *attr, const char *buf, size_t count) \
649 { \
650 return wacom_led_select_store(dev, SET_ID, buf, count); \
651 } \
652 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
653 struct device_attribute *attr, char *buf) \
654 { \
655 struct wacom *wacom = dev_get_drvdata(dev); \
656 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
657 } \
658 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
659 wacom_led##SET_ID##_select_show, \
660 wacom_led##SET_ID##_select_store)
661
662 DEVICE_LED_SELECT_ATTR(0);
663 DEVICE_LED_SELECT_ATTR(1);
664
wacom_luminance_store(struct wacom * wacom,u8 * dest,const char * buf,size_t count)665 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
666 const char *buf, size_t count)
667 {
668 unsigned int value;
669 int err;
670
671 err = kstrtouint(buf, 10, &value);
672 if (err)
673 return err;
674
675 mutex_lock(&wacom->lock);
676
677 *dest = value & 0x7f;
678 err = wacom_led_control(wacom);
679
680 mutex_unlock(&wacom->lock);
681
682 return err < 0 ? err : count;
683 }
684
685 #define DEVICE_LUMINANCE_ATTR(name, field) \
686 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
687 struct device_attribute *attr, const char *buf, size_t count) \
688 { \
689 struct wacom *wacom = dev_get_drvdata(dev); \
690 \
691 return wacom_luminance_store(wacom, &wacom->led.field, \
692 buf, count); \
693 } \
694 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
695 NULL, wacom_##name##_luminance_store)
696
697 DEVICE_LUMINANCE_ATTR(status0, llv);
698 DEVICE_LUMINANCE_ATTR(status1, hlv);
699 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
700
wacom_button_image_store(struct device * dev,int button_id,const char * buf,size_t count)701 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
702 const char *buf, size_t count)
703 {
704 struct wacom *wacom = dev_get_drvdata(dev);
705 int err;
706
707 if (count != 1024)
708 return -EINVAL;
709
710 mutex_lock(&wacom->lock);
711
712 err = wacom_led_putimage(wacom, button_id, buf);
713
714 mutex_unlock(&wacom->lock);
715
716 return err < 0 ? err : count;
717 }
718
719 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
720 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
721 struct device_attribute *attr, const char *buf, size_t count) \
722 { \
723 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
724 } \
725 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
726 NULL, wacom_btnimg##BUTTON_ID##_store)
727
728 DEVICE_BTNIMG_ATTR(0);
729 DEVICE_BTNIMG_ATTR(1);
730 DEVICE_BTNIMG_ATTR(2);
731 DEVICE_BTNIMG_ATTR(3);
732 DEVICE_BTNIMG_ATTR(4);
733 DEVICE_BTNIMG_ATTR(5);
734 DEVICE_BTNIMG_ATTR(6);
735 DEVICE_BTNIMG_ATTR(7);
736
737 static struct attribute *cintiq_led_attrs[] = {
738 &dev_attr_status_led0_select.attr,
739 &dev_attr_status_led1_select.attr,
740 NULL
741 };
742
743 static struct attribute_group cintiq_led_attr_group = {
744 .name = "wacom_led",
745 .attrs = cintiq_led_attrs,
746 };
747
748 static struct attribute *intuos4_led_attrs[] = {
749 &dev_attr_status0_luminance.attr,
750 &dev_attr_status1_luminance.attr,
751 &dev_attr_status_led0_select.attr,
752 &dev_attr_buttons_luminance.attr,
753 &dev_attr_button0_rawimg.attr,
754 &dev_attr_button1_rawimg.attr,
755 &dev_attr_button2_rawimg.attr,
756 &dev_attr_button3_rawimg.attr,
757 &dev_attr_button4_rawimg.attr,
758 &dev_attr_button5_rawimg.attr,
759 &dev_attr_button6_rawimg.attr,
760 &dev_attr_button7_rawimg.attr,
761 NULL
762 };
763
764 static struct attribute_group intuos4_led_attr_group = {
765 .name = "wacom_led",
766 .attrs = intuos4_led_attrs,
767 };
768
wacom_initialize_leds(struct wacom * wacom)769 static int wacom_initialize_leds(struct wacom *wacom)
770 {
771 int error;
772
773 /* Initialize default values */
774 switch (wacom->wacom_wac.features.type) {
775 case INTUOS4:
776 case INTUOS4L:
777 wacom->led.select[0] = 0;
778 wacom->led.select[1] = 0;
779 wacom->led.llv = 10;
780 wacom->led.hlv = 20;
781 wacom->led.img_lum = 10;
782 error = sysfs_create_group(&wacom->intf->dev.kobj,
783 &intuos4_led_attr_group);
784 break;
785
786 case WACOM_24HD:
787 case WACOM_21UX2:
788 wacom->led.select[0] = 0;
789 wacom->led.select[1] = 0;
790 wacom->led.llv = 0;
791 wacom->led.hlv = 0;
792 wacom->led.img_lum = 0;
793
794 error = sysfs_create_group(&wacom->intf->dev.kobj,
795 &cintiq_led_attr_group);
796 break;
797
798 default:
799 return 0;
800 }
801
802 if (error) {
803 dev_err(&wacom->intf->dev,
804 "cannot create sysfs group err: %d\n", error);
805 return error;
806 }
807 wacom_led_control(wacom);
808
809 return 0;
810 }
811
wacom_destroy_leds(struct wacom * wacom)812 static void wacom_destroy_leds(struct wacom *wacom)
813 {
814 switch (wacom->wacom_wac.features.type) {
815 case INTUOS4:
816 case INTUOS4L:
817 sysfs_remove_group(&wacom->intf->dev.kobj,
818 &intuos4_led_attr_group);
819 break;
820
821 case WACOM_24HD:
822 case WACOM_21UX2:
823 sysfs_remove_group(&wacom->intf->dev.kobj,
824 &cintiq_led_attr_group);
825 break;
826 }
827 }
828
wacom_probe(struct usb_interface * intf,const struct usb_device_id * id)829 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
830 {
831 struct usb_device *dev = interface_to_usbdev(intf);
832 struct usb_endpoint_descriptor *endpoint;
833 struct wacom *wacom;
834 struct wacom_wac *wacom_wac;
835 struct wacom_features *features;
836 struct input_dev *input_dev;
837 int error;
838
839 if (!id->driver_info)
840 return -EINVAL;
841
842 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
843 input_dev = input_allocate_device();
844 if (!wacom || !input_dev) {
845 error = -ENOMEM;
846 goto fail1;
847 }
848
849 wacom_wac = &wacom->wacom_wac;
850 wacom_wac->features = *((struct wacom_features *)id->driver_info);
851 features = &wacom_wac->features;
852 if (features->pktlen > WACOM_PKGLEN_MAX) {
853 error = -EINVAL;
854 goto fail1;
855 }
856
857 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
858 GFP_KERNEL, &wacom->data_dma);
859 if (!wacom_wac->data) {
860 error = -ENOMEM;
861 goto fail1;
862 }
863
864 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
865 if (!wacom->irq) {
866 error = -ENOMEM;
867 goto fail2;
868 }
869
870 wacom->usbdev = dev;
871 wacom->intf = intf;
872 mutex_init(&wacom->lock);
873 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
874 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
875
876 wacom_wac->input = input_dev;
877
878 endpoint = &intf->cur_altsetting->endpoint[0].desc;
879
880 /* Retrieve the physical and logical size for OEM devices */
881 error = wacom_retrieve_hid_descriptor(intf, features);
882 if (error)
883 goto fail3;
884
885 wacom_setup_device_quirks(features);
886
887 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
888
889 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
890 /* Append the device type to the name */
891 strlcat(wacom_wac->name,
892 features->device_type == BTN_TOOL_PEN ?
893 " Pen" : " Finger",
894 sizeof(wacom_wac->name));
895
896 error = wacom_add_shared_data(wacom_wac, dev);
897 if (error)
898 goto fail3;
899 }
900
901 input_dev->name = wacom_wac->name;
902 input_dev->dev.parent = &intf->dev;
903 input_dev->open = wacom_open;
904 input_dev->close = wacom_close;
905 usb_to_input_id(dev, &input_dev->id);
906 input_set_drvdata(input_dev, wacom);
907
908 wacom_setup_input_capabilities(input_dev, wacom_wac);
909
910 usb_fill_int_urb(wacom->irq, dev,
911 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
912 wacom_wac->data, features->pktlen,
913 wacom_sys_irq, wacom, endpoint->bInterval);
914 wacom->irq->transfer_dma = wacom->data_dma;
915 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
916
917 error = wacom_initialize_leds(wacom);
918 if (error)
919 goto fail4;
920
921 error = input_register_device(input_dev);
922 if (error)
923 goto fail5;
924
925 /* Note that if query fails it is not a hard failure */
926 wacom_query_tablet_data(intf, features);
927
928 usb_set_intfdata(intf, wacom);
929 return 0;
930
931 fail5: wacom_destroy_leds(wacom);
932 fail4: wacom_remove_shared_data(wacom_wac);
933 fail3: usb_free_urb(wacom->irq);
934 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
935 fail1: input_free_device(input_dev);
936 kfree(wacom);
937 return error;
938 }
939
wacom_disconnect(struct usb_interface * intf)940 static void wacom_disconnect(struct usb_interface *intf)
941 {
942 struct wacom *wacom = usb_get_intfdata(intf);
943
944 usb_set_intfdata(intf, NULL);
945
946 usb_kill_urb(wacom->irq);
947 input_unregister_device(wacom->wacom_wac.input);
948 wacom_destroy_leds(wacom);
949 usb_free_urb(wacom->irq);
950 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
951 wacom->wacom_wac.data, wacom->data_dma);
952 wacom_remove_shared_data(&wacom->wacom_wac);
953 kfree(wacom);
954 }
955
wacom_suspend(struct usb_interface * intf,pm_message_t message)956 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
957 {
958 struct wacom *wacom = usb_get_intfdata(intf);
959
960 mutex_lock(&wacom->lock);
961 usb_kill_urb(wacom->irq);
962 mutex_unlock(&wacom->lock);
963
964 return 0;
965 }
966
wacom_resume(struct usb_interface * intf)967 static int wacom_resume(struct usb_interface *intf)
968 {
969 struct wacom *wacom = usb_get_intfdata(intf);
970 struct wacom_features *features = &wacom->wacom_wac.features;
971 int rv = 0;
972
973 mutex_lock(&wacom->lock);
974
975 /* switch to wacom mode first */
976 wacom_query_tablet_data(intf, features);
977 wacom_led_control(wacom);
978
979 if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
980 rv = -EIO;
981
982 mutex_unlock(&wacom->lock);
983
984 return rv;
985 }
986
wacom_reset_resume(struct usb_interface * intf)987 static int wacom_reset_resume(struct usb_interface *intf)
988 {
989 return wacom_resume(intf);
990 }
991
992 static struct usb_driver wacom_driver = {
993 .name = "wacom",
994 .id_table = wacom_ids,
995 .probe = wacom_probe,
996 .disconnect = wacom_disconnect,
997 .suspend = wacom_suspend,
998 .resume = wacom_resume,
999 .reset_resume = wacom_reset_resume,
1000 .supports_autosuspend = 1,
1001 };
1002
1003 module_usb_driver(wacom_driver);
1004