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Merge branch 'next' into for-linus
[linux-btrfs-devel.git] / drivers / input / tablet / wacom_sys.c
blob1c1b7b43cf923f728c697514fec2cc5afaa7cd31
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 0xc0
32
33 enum {
34 WCM_UNDEFINED = 0,
35 WCM_DESKTOP,
36 WCM_DIGITIZER,
37 };
38
39 struct hid_descriptor {
40 struct usb_descriptor_header header;
41 __le16 bcdHID;
42 u8 bCountryCode;
43 u8 bNumDescriptors;
44 u8 bDescriptorType;
45 __le16 wDescriptorLength;
46 } __attribute__ ((packed));
47
48 /* defines to get/set USB message */
49 #define USB_REQ_GET_REPORT 0x01
50 #define USB_REQ_SET_REPORT 0x09
51
52 #define WAC_HID_FEATURE_REPORT 0x03
53 #define WAC_MSG_RETRIES 5
54
55 #define WAC_CMD_LED_CONTROL 0x20
56 #define WAC_CMD_ICON_START 0x21
57 #define WAC_CMD_ICON_XFER 0x23
58 #define WAC_CMD_RETRIES 10
59
60 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
61 void *buf, size_t size, unsigned int retries)
62 {
63 struct usb_device *dev = interface_to_usbdev(intf);
64 int retval;
65
66 do {
67 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
68 USB_REQ_GET_REPORT,
69 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
70 (type << 8) + id,
71 intf->altsetting[0].desc.bInterfaceNumber,
72 buf, size, 100);
73 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
74
75 return retval;
76 }
77
78 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
79 void *buf, size_t size, unsigned int retries)
80 {
81 struct usb_device *dev = interface_to_usbdev(intf);
82 int retval;
83
84 do {
85 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
86 USB_REQ_SET_REPORT,
87 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
88 (type << 8) + id,
89 intf->altsetting[0].desc.bInterfaceNumber,
90 buf, size, 1000);
91 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
92
93 return retval;
94 }
95
96 static void wacom_sys_irq(struct urb *urb)
97 {
98 struct wacom *wacom = urb->context;
99 int retval;
100
101 switch (urb->status) {
102 case 0:
103 /* success */
104 break;
105 case -ECONNRESET:
106 case -ENOENT:
107 case -ESHUTDOWN:
108 /* this urb is terminated, clean up */
109 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
110 return;
111 default:
112 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
113 goto exit;
114 }
115
116 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
117
118 exit:
119 usb_mark_last_busy(wacom->usbdev);
120 retval = usb_submit_urb(urb, GFP_ATOMIC);
121 if (retval)
122 err ("%s - usb_submit_urb failed with result %d",
123 __func__, retval);
124 }
125
126 static int wacom_open(struct input_dev *dev)
127 {
128 struct wacom *wacom = input_get_drvdata(dev);
129 int retval = 0;
130
131 if (usb_autopm_get_interface(wacom->intf) < 0)
132 return -EIO;
133
134 mutex_lock(&wacom->lock);
135
136 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
137 retval = -EIO;
138 goto out;
139 }
140
141 wacom->open = true;
142 wacom->intf->needs_remote_wakeup = 1;
143
144 out:
145 mutex_unlock(&wacom->lock);
146 usb_autopm_put_interface(wacom->intf);
147 return retval;
148 }
149
150 static void wacom_close(struct input_dev *dev)
151 {
152 struct wacom *wacom = input_get_drvdata(dev);
153 int autopm_error;
154
155 autopm_error = usb_autopm_get_interface(wacom->intf);
156
157 mutex_lock(&wacom->lock);
158 usb_kill_urb(wacom->irq);
159 wacom->open = false;
160 wacom->intf->needs_remote_wakeup = 0;
161 mutex_unlock(&wacom->lock);
162
163 if (!autopm_error)
164 usb_autopm_put_interface(wacom->intf);
165 }
166
167 static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
168 struct wacom_features *features)
169 {
170 struct usb_device *dev = interface_to_usbdev(intf);
171 char limit = 0;
172 /* result has to be defined as int for some devices */
173 int result = 0;
174 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
175 unsigned char *report;
176
177 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
178 if (!report)
179 return -ENOMEM;
180
181 /* retrive report descriptors */
182 do {
183 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
184 USB_REQ_GET_DESCRIPTOR,
185 USB_RECIP_INTERFACE | USB_DIR_IN,
186 HID_DEVICET_REPORT << 8,
187 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
188 report,
189 hid_desc->wDescriptorLength,
190 5000); /* 5 secs */
191 } while (result < 0 && limit++ < WAC_MSG_RETRIES);
192
193 /* No need to parse the Descriptor. It isn't an error though */
194 if (result < 0)
195 goto out;
196
197 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
198
199 switch (report[i]) {
200 case HID_USAGE_PAGE:
201 switch (report[i + 1]) {
202 case HID_USAGE_PAGE_DIGITIZER:
203 usage = WCM_DIGITIZER;
204 i++;
205 break;
206
207 case HID_USAGE_PAGE_DESKTOP:
208 usage = WCM_DESKTOP;
209 i++;
210 break;
211 }
212 break;
213
214 case HID_USAGE:
215 switch (report[i + 1]) {
216 case HID_USAGE_X:
217 if (usage == WCM_DESKTOP) {
218 if (finger) {
219 features->device_type = BTN_TOOL_FINGER;
220 if (features->type == TABLETPC2FG) {
221 /* need to reset back */
222 features->pktlen = WACOM_PKGLEN_TPC2FG;
223 features->device_type = BTN_TOOL_DOUBLETAP;
224 }
225 if (features->type == BAMBOO_PT) {
226 /* need to reset back */
227 features->pktlen = WACOM_PKGLEN_BBTOUCH;
228 features->device_type = BTN_TOOL_DOUBLETAP;
229 features->x_phy =
230 get_unaligned_le16(&report[i + 5]);
231 features->x_max =
232 get_unaligned_le16(&report[i + 8]);
233 i += 15;
234 } else {
235 features->x_max =
236 get_unaligned_le16(&report[i + 3]);
237 features->x_phy =
238 get_unaligned_le16(&report[i + 6]);
239 features->unit = report[i + 9];
240 features->unitExpo = report[i + 11];
241 i += 12;
242 }
243 } else if (pen) {
244 /* penabled only accepts exact bytes of data */
245 if (features->type == TABLETPC2FG)
246 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
247 if (features->type == BAMBOO_PT)
248 features->pktlen = WACOM_PKGLEN_BBFUN;
249 features->device_type = BTN_TOOL_PEN;
250 features->x_max =
251 get_unaligned_le16(&report[i + 3]);
252 i += 4;
253 }
254 }
255 break;
256
257 case HID_USAGE_Y:
258 if (usage == WCM_DESKTOP) {
259 if (finger) {
260 features->device_type = BTN_TOOL_FINGER;
261 if (features->type == TABLETPC2FG) {
262 /* need to reset back */
263 features->pktlen = WACOM_PKGLEN_TPC2FG;
264 features->device_type = BTN_TOOL_DOUBLETAP;
265 features->y_max =
266 get_unaligned_le16(&report[i + 3]);
267 features->y_phy =
268 get_unaligned_le16(&report[i + 6]);
269 i += 7;
270 } else if (features->type == BAMBOO_PT) {
271 /* need to reset back */
272 features->pktlen = WACOM_PKGLEN_BBTOUCH;
273 features->device_type = BTN_TOOL_DOUBLETAP;
274 features->y_phy =
275 get_unaligned_le16(&report[i + 3]);
276 features->y_max =
277 get_unaligned_le16(&report[i + 6]);
278 i += 12;
279 } else {
280 features->y_max =
281 features->x_max;
282 features->y_phy =
283 get_unaligned_le16(&report[i + 3]);
284 i += 4;
285 }
286 } else if (pen) {
287 /* penabled only accepts exact bytes of data */
288 if (features->type == TABLETPC2FG)
289 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
290 if (features->type == BAMBOO_PT)
291 features->pktlen = WACOM_PKGLEN_BBFUN;
292 features->device_type = BTN_TOOL_PEN;
293 features->y_max =
294 get_unaligned_le16(&report[i + 3]);
295 i += 4;
296 }
297 }
298 break;
299
300 case HID_USAGE_FINGER:
301 finger = 1;
302 i++;
303 break;
304
305 case HID_USAGE_STYLUS:
306 pen = 1;
307 i++;
308 break;
309 }
310 break;
311
312 case HID_COLLECTION:
313 /* reset UsagePage and Finger */
314 finger = usage = 0;
315 break;
316 }
317 }
318
319 out:
320 result = 0;
321 kfree(report);
322 return result;
323 }
324
325 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
326 {
327 unsigned char *rep_data;
328 int limit = 0, report_id = 2;
329 int error = -ENOMEM;
330
331 rep_data = kmalloc(4, GFP_KERNEL);
332 if (!rep_data)
333 return error;
334
335 /* ask to report tablet data if it is MT Tablet PC or
336 * not a Tablet PC */
337 if (features->type == TABLETPC2FG) {
338 do {
339 rep_data[0] = 3;
340 rep_data[1] = 4;
341 rep_data[2] = 0;
342 rep_data[3] = 0;
343 report_id = 3;
344 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
345 report_id, rep_data, 4, 1);
346 if (error >= 0)
347 error = wacom_get_report(intf,
348 WAC_HID_FEATURE_REPORT,
349 report_id, rep_data, 4, 1);
350 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
351 } else if (features->type != TABLETPC) {
352 do {
353 rep_data[0] = 2;
354 rep_data[1] = 2;
355 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
356 report_id, rep_data, 2, 1);
357 if (error >= 0)
358 error = wacom_get_report(intf,
359 WAC_HID_FEATURE_REPORT,
360 report_id, rep_data, 2, 1);
361 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
362 }
363
364 kfree(rep_data);
365
366 return error < 0 ? error : 0;
367 }
368
369 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
370 struct wacom_features *features)
371 {
372 int error = 0;
373 struct usb_host_interface *interface = intf->cur_altsetting;
374 struct hid_descriptor *hid_desc;
375
376 /* default features */
377 features->device_type = BTN_TOOL_PEN;
378 features->x_fuzz = 4;
379 features->y_fuzz = 4;
380 features->pressure_fuzz = 0;
381 features->distance_fuzz = 0;
382
383 /* only Tablet PCs and Bamboo P&T need to retrieve the info */
384 if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
385 (features->type != BAMBOO_PT))
386 goto out;
387
388 if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
389 if (usb_get_extra_descriptor(&interface->endpoint[0],
390 HID_DEVICET_REPORT, &hid_desc)) {
391 printk("wacom: can not retrieve extra class descriptor\n");
392 error = 1;
393 goto out;
394 }
395 }
396 error = wacom_parse_hid(intf, hid_desc, features);
397 if (error)
398 goto out;
399
400 out:
401 return error;
402 }
403
404 struct wacom_usbdev_data {
405 struct list_head list;
406 struct kref kref;
407 struct usb_device *dev;
408 struct wacom_shared shared;
409 };
410
411 static LIST_HEAD(wacom_udev_list);
412 static DEFINE_MUTEX(wacom_udev_list_lock);
413
414 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
415 {
416 struct wacom_usbdev_data *data;
417
418 list_for_each_entry(data, &wacom_udev_list, list) {
419 if (data->dev == dev) {
420 kref_get(&data->kref);
421 return data;
422 }
423 }
424
425 return NULL;
426 }
427
428 static int wacom_add_shared_data(struct wacom_wac *wacom,
429 struct usb_device *dev)
430 {
431 struct wacom_usbdev_data *data;
432 int retval = 0;
433
434 mutex_lock(&wacom_udev_list_lock);
435
436 data = wacom_get_usbdev_data(dev);
437 if (!data) {
438 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
439 if (!data) {
440 retval = -ENOMEM;
441 goto out;
442 }
443
444 kref_init(&data->kref);
445 data->dev = dev;
446 list_add_tail(&data->list, &wacom_udev_list);
447 }
448
449 wacom->shared = &data->shared;
450
451 out:
452 mutex_unlock(&wacom_udev_list_lock);
453 return retval;
454 }
455
456 static void wacom_release_shared_data(struct kref *kref)
457 {
458 struct wacom_usbdev_data *data =
459 container_of(kref, struct wacom_usbdev_data, kref);
460
461 mutex_lock(&wacom_udev_list_lock);
462 list_del(&data->list);
463 mutex_unlock(&wacom_udev_list_lock);
464
465 kfree(data);
466 }
467
468 static void wacom_remove_shared_data(struct wacom_wac *wacom)
469 {
470 struct wacom_usbdev_data *data;
471
472 if (wacom->shared) {
473 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
474 kref_put(&data->kref, wacom_release_shared_data);
475 wacom->shared = NULL;
476 }
477 }
478
479 static int wacom_led_control(struct wacom *wacom)
480 {
481 unsigned char *buf;
482 int retval, led = 0;
483
484 buf = kzalloc(9, GFP_KERNEL);
485 if (!buf)
486 return -ENOMEM;
487
488 if (wacom->wacom_wac.features.type == WACOM_21UX2)
489 led = (wacom->led.select[1] << 4) | 0x40;
490
491 led |= wacom->led.select[0] | 0x4;
492
493 buf[0] = WAC_CMD_LED_CONTROL;
494 buf[1] = led;
495 buf[2] = wacom->led.llv;
496 buf[3] = wacom->led.hlv;
497 buf[4] = wacom->led.img_lum;
498
499 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
500 buf, 9, WAC_CMD_RETRIES);
501 kfree(buf);
502
503 return retval;
504 }
505
506 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
507 {
508 unsigned char *buf;
509 int i, retval;
510
511 buf = kzalloc(259, GFP_KERNEL);
512 if (!buf)
513 return -ENOMEM;
514
515 /* Send 'start' command */
516 buf[0] = WAC_CMD_ICON_START;
517 buf[1] = 1;
518 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
519 buf, 2, WAC_CMD_RETRIES);
520 if (retval < 0)
521 goto out;
522
523 buf[0] = WAC_CMD_ICON_XFER;
524 buf[1] = button_id & 0x07;
525 for (i = 0; i < 4; i++) {
526 buf[2] = i;
527 memcpy(buf + 3, img + i * 256, 256);
528
529 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
530 buf, 259, WAC_CMD_RETRIES);
531 if (retval < 0)
532 break;
533 }
534
535 /* Send 'stop' */
536 buf[0] = WAC_CMD_ICON_START;
537 buf[1] = 0;
538 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
539 buf, 2, WAC_CMD_RETRIES);
540
541 out:
542 kfree(buf);
543 return retval;
544 }
545
546 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
547 const char *buf, size_t count)
548 {
549 struct wacom *wacom = dev_get_drvdata(dev);
550 unsigned int id;
551 int err;
552
553 err = kstrtouint(buf, 10, &id);
554 if (err)
555 return err;
556
557 mutex_lock(&wacom->lock);
558
559 wacom->led.select[set_id] = id & 0x3;
560 err = wacom_led_control(wacom);
561
562 mutex_unlock(&wacom->lock);
563
564 return err < 0 ? err : count;
565 }
566
567 #define DEVICE_LED_SELECT_ATTR(SET_ID) \
568 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \
569 struct device_attribute *attr, const char *buf, size_t count) \
570 { \
571 return wacom_led_select_store(dev, SET_ID, buf, count); \
572 } \
573 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \
574 struct device_attribute *attr, char *buf) \
575 { \
576 struct wacom *wacom = dev_get_drvdata(dev); \
577 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \
578 } \
579 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \
580 wacom_led##SET_ID##_select_show, \
581 wacom_led##SET_ID##_select_store)
582
583 DEVICE_LED_SELECT_ATTR(0);
584 DEVICE_LED_SELECT_ATTR(1);
585
586 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
587 const char *buf, size_t count)
588 {
589 unsigned int value;
590 int err;
591
592 err = kstrtouint(buf, 10, &value);
593 if (err)
594 return err;
595
596 mutex_lock(&wacom->lock);
597
598 *dest = value & 0x7f;
599 err = wacom_led_control(wacom);
600
601 mutex_unlock(&wacom->lock);
602
603 return err < 0 ? err : count;
604 }
605
606 #define DEVICE_LUMINANCE_ATTR(name, field) \
607 static ssize_t wacom_##name##_luminance_store(struct device *dev, \
608 struct device_attribute *attr, const char *buf, size_t count) \
609 { \
610 struct wacom *wacom = dev_get_drvdata(dev); \
611 \
612 return wacom_luminance_store(wacom, &wacom->led.field, \
613 buf, count); \
614 } \
615 static DEVICE_ATTR(name##_luminance, S_IWUSR, \
616 NULL, wacom_##name##_luminance_store)
617
618 DEVICE_LUMINANCE_ATTR(status0, llv);
619 DEVICE_LUMINANCE_ATTR(status1, hlv);
620 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
621
622 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
623 const char *buf, size_t count)
624 {
625 struct wacom *wacom = dev_get_drvdata(dev);
626 int err;
627
628 if (count != 1024)
629 return -EINVAL;
630
631 mutex_lock(&wacom->lock);
632
633 err = wacom_led_putimage(wacom, button_id, buf);
634
635 mutex_unlock(&wacom->lock);
636
637 return err < 0 ? err : count;
638 }
639
640 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \
641 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \
642 struct device_attribute *attr, const char *buf, size_t count) \
643 { \
644 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \
645 } \
646 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \
647 NULL, wacom_btnimg##BUTTON_ID##_store)
648
649 DEVICE_BTNIMG_ATTR(0);
650 DEVICE_BTNIMG_ATTR(1);
651 DEVICE_BTNIMG_ATTR(2);
652 DEVICE_BTNIMG_ATTR(3);
653 DEVICE_BTNIMG_ATTR(4);
654 DEVICE_BTNIMG_ATTR(5);
655 DEVICE_BTNIMG_ATTR(6);
656 DEVICE_BTNIMG_ATTR(7);
657
658 static struct attribute *cintiq_led_attrs[] = {
659 &dev_attr_status_led0_select.attr,
660 &dev_attr_status_led1_select.attr,
661 NULL
662 };
663
664 static struct attribute_group cintiq_led_attr_group = {
665 .name = "wacom_led",
666 .attrs = cintiq_led_attrs,
667 };
668
669 static struct attribute *intuos4_led_attrs[] = {
670 &dev_attr_status0_luminance.attr,
671 &dev_attr_status1_luminance.attr,
672 &dev_attr_status_led0_select.attr,
673 &dev_attr_buttons_luminance.attr,
674 &dev_attr_button0_rawimg.attr,
675 &dev_attr_button1_rawimg.attr,
676 &dev_attr_button2_rawimg.attr,
677 &dev_attr_button3_rawimg.attr,
678 &dev_attr_button4_rawimg.attr,
679 &dev_attr_button5_rawimg.attr,
680 &dev_attr_button6_rawimg.attr,
681 &dev_attr_button7_rawimg.attr,
682 NULL
683 };
684
685 static struct attribute_group intuos4_led_attr_group = {
686 .name = "wacom_led",
687 .attrs = intuos4_led_attrs,
688 };
689
690 static int wacom_initialize_leds(struct wacom *wacom)
691 {
692 int error;
693
694 /* Initialize default values */
695 switch (wacom->wacom_wac.features.type) {
696 case INTUOS4:
697 case INTUOS4L:
698 wacom->led.select[0] = 0;
699 wacom->led.select[1] = 0;
700 wacom->led.llv = 10;
701 wacom->led.hlv = 20;
702 wacom->led.img_lum = 10;
703 error = sysfs_create_group(&wacom->intf->dev.kobj,
704 &intuos4_led_attr_group);
705 break;
706
707 case WACOM_21UX2:
708 wacom->led.select[0] = 0;
709 wacom->led.select[1] = 0;
710 wacom->led.llv = 0;
711 wacom->led.hlv = 0;
712 wacom->led.img_lum = 0;
713
714 error = sysfs_create_group(&wacom->intf->dev.kobj,
715 &cintiq_led_attr_group);
716 break;
717
718 default:
719 return 0;
720 }
721
722 if (error) {
723 dev_err(&wacom->intf->dev,
724 "cannot create sysfs group err: %d\n", error);
725 return error;
726 }
727 wacom_led_control(wacom);
728
729 return 0;
730 }
731
732 static void wacom_destroy_leds(struct wacom *wacom)
733 {
734 switch (wacom->wacom_wac.features.type) {
735 case INTUOS4:
736 case INTUOS4L:
737 sysfs_remove_group(&wacom->intf->dev.kobj,
738 &intuos4_led_attr_group);
739 break;
740
741 case WACOM_21UX2:
742 sysfs_remove_group(&wacom->intf->dev.kobj,
743 &cintiq_led_attr_group);
744 break;
745 }
746 }
747
748 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
749 {
750 struct usb_device *dev = interface_to_usbdev(intf);
751 struct usb_endpoint_descriptor *endpoint;
752 struct wacom *wacom;
753 struct wacom_wac *wacom_wac;
754 struct wacom_features *features;
755 struct input_dev *input_dev;
756 int error;
757
758 if (!id->driver_info)
759 return -EINVAL;
760
761 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
762 input_dev = input_allocate_device();
763 if (!wacom || !input_dev) {
764 error = -ENOMEM;
765 goto fail1;
766 }
767
768 wacom_wac = &wacom->wacom_wac;
769 wacom_wac->features = *((struct wacom_features *)id->driver_info);
770 features = &wacom_wac->features;
771 if (features->pktlen > WACOM_PKGLEN_MAX) {
772 error = -EINVAL;
773 goto fail1;
774 }
775
776 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
777 GFP_KERNEL, &wacom->data_dma);
778 if (!wacom_wac->data) {
779 error = -ENOMEM;
780 goto fail1;
781 }
782
783 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
784 if (!wacom->irq) {
785 error = -ENOMEM;
786 goto fail2;
787 }
788
789 wacom->usbdev = dev;
790 wacom->intf = intf;
791 mutex_init(&wacom->lock);
792 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
793 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
794
795 wacom_wac->input = input_dev;
796
797 endpoint = &intf->cur_altsetting->endpoint[0].desc;
798
799 /* Retrieve the physical and logical size for OEM devices */
800 error = wacom_retrieve_hid_descriptor(intf, features);
801 if (error)
802 goto fail3;
803
804 wacom_setup_device_quirks(features);
805
806 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
807
808 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
809 /* Append the device type to the name */
810 strlcat(wacom_wac->name,
811 features->device_type == BTN_TOOL_PEN ?
812 " Pen" : " Finger",
813 sizeof(wacom_wac->name));
814
815 error = wacom_add_shared_data(wacom_wac, dev);
816 if (error)
817 goto fail3;
818 }
819
820 input_dev->name = wacom_wac->name;
821 input_dev->dev.parent = &intf->dev;
822 input_dev->open = wacom_open;
823 input_dev->close = wacom_close;
824 usb_to_input_id(dev, &input_dev->id);
825 input_set_drvdata(input_dev, wacom);
826
827 wacom_setup_input_capabilities(input_dev, wacom_wac);
828
829 usb_fill_int_urb(wacom->irq, dev,
830 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
831 wacom_wac->data, features->pktlen,
832 wacom_sys_irq, wacom, endpoint->bInterval);
833 wacom->irq->transfer_dma = wacom->data_dma;
834 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
835
836 error = wacom_initialize_leds(wacom);
837 if (error)
838 goto fail4;
839
840 error = input_register_device(input_dev);
841 if (error)
842 goto fail5;
843
844 /* Note that if query fails it is not a hard failure */
845 wacom_query_tablet_data(intf, features);
846
847 usb_set_intfdata(intf, wacom);
848 return 0;
849
850 fail5: wacom_destroy_leds(wacom);
851 fail4: wacom_remove_shared_data(wacom_wac);
852 fail3: usb_free_urb(wacom->irq);
853 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
854 fail1: input_free_device(input_dev);
855 kfree(wacom);
856 return error;
857 }
858
859 static void wacom_disconnect(struct usb_interface *intf)
860 {
861 struct wacom *wacom = usb_get_intfdata(intf);
862
863 usb_set_intfdata(intf, NULL);
864
865 usb_kill_urb(wacom->irq);
866 input_unregister_device(wacom->wacom_wac.input);
867 wacom_destroy_leds(wacom);
868 usb_free_urb(wacom->irq);
869 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
870 wacom->wacom_wac.data, wacom->data_dma);
871 wacom_remove_shared_data(&wacom->wacom_wac);
872 kfree(wacom);
873 }
874
875 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
876 {
877 struct wacom *wacom = usb_get_intfdata(intf);
878
879 mutex_lock(&wacom->lock);
880 usb_kill_urb(wacom->irq);
881 mutex_unlock(&wacom->lock);
882
883 return 0;
884 }
885
886 static int wacom_resume(struct usb_interface *intf)
887 {
888 struct wacom *wacom = usb_get_intfdata(intf);
889 struct wacom_features *features = &wacom->wacom_wac.features;
890 int rv = 0;
891
892 mutex_lock(&wacom->lock);
893
894 /* switch to wacom mode first */
895 wacom_query_tablet_data(intf, features);
896 wacom_led_control(wacom);
897
898 if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
899 rv = -EIO;
900
901 mutex_unlock(&wacom->lock);
902
903 return rv;
904 }
905
906 static int wacom_reset_resume(struct usb_interface *intf)
907 {
908 return wacom_resume(intf);
909 }
910
911 static struct usb_driver wacom_driver = {
912 .name = "wacom",
913 .id_table = wacom_ids,
914 .probe = wacom_probe,
915 .disconnect = wacom_disconnect,
916 .suspend = wacom_suspend,
917 .resume = wacom_resume,
918 .reset_resume = wacom_reset_resume,
919 .supports_autosuspend = 1,
920 };
921
922 static int __init wacom_init(void)
923 {
924 int result;
925
926 result = usb_register(&wacom_driver);
927 if (result == 0)
928 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
929 DRIVER_DESC "\n");
930 return result;
931 }
932
933 static void __exit wacom_exit(void)
934 {
935 usb_deregister(&wacom_driver);
936 }
937
938 module_init(wacom_init);
939 module_exit(wacom_exit);
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