sparc: Fix even more fallout from system.h split.
[linux-2.6.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_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
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
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
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
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
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
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_FINGER;
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 * 100) / features->x_resolution;
188                 features->y_phy =
189                         (features->y_max * 100) / features->y_resolution;
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  */
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                                                 }
290                                                 if (features->type == BAMBOO_PT) {
291                                                         /* need to reset back */
292                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
293                                                         features->x_phy =
294                                                                 get_unaligned_le16(&report[i + 5]);
295                                                         features->x_max =
296                                                                 get_unaligned_le16(&report[i + 8]);
297                                                         i += 15;
298                                                 } else {
299                                                         features->x_max =
300                                                                 get_unaligned_le16(&report[i + 3]);
301                                                         features->x_phy =
302                                                                 get_unaligned_le16(&report[i + 6]);
303                                                         features->unit = report[i + 9];
304                                                         features->unitExpo = report[i + 11];
305                                                         i += 12;
306                                                 }
307                                         } else if (pen) {
308                                                 /* penabled only accepts exact bytes of data */
309                                                 if (features->type == TABLETPC2FG)
310                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
311                                                 features->device_type = BTN_TOOL_PEN;
312                                                 features->x_max =
313                                                         get_unaligned_le16(&report[i + 3]);
314                                                 i += 4;
315                                         }
316                                 }
317                                 break;
318
319                         case HID_USAGE_Y:
320                                 if (usage == WCM_DESKTOP) {
321                                         if (finger) {
322                                                 features->device_type = BTN_TOOL_FINGER;
323                                                 if (features->type == TABLETPC2FG) {
324                                                         /* need to reset back */
325                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
326                                                         features->y_max =
327                                                                 get_unaligned_le16(&report[i + 3]);
328                                                         features->y_phy =
329                                                                 get_unaligned_le16(&report[i + 6]);
330                                                         i += 7;
331                                                 } else if (features->type == BAMBOO_PT) {
332                                                         /* need to reset back */
333                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
334                                                         features->y_phy =
335                                                                 get_unaligned_le16(&report[i + 3]);
336                                                         features->y_max =
337                                                                 get_unaligned_le16(&report[i + 6]);
338                                                         i += 12;
339                                                 } else {
340                                                         features->y_max =
341                                                                 features->x_max;
342                                                         features->y_phy =
343                                                                 get_unaligned_le16(&report[i + 3]);
344                                                         i += 4;
345                                                 }
346                                         } else if (pen) {
347                                                 /* penabled only accepts exact bytes of data */
348                                                 if (features->type == TABLETPC2FG)
349                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
350                                                 features->device_type = BTN_TOOL_PEN;
351                                                 features->y_max =
352                                                         get_unaligned_le16(&report[i + 3]);
353                                                 i += 4;
354                                         }
355                                 }
356                                 break;
357
358                         case HID_USAGE_FINGER:
359                                 finger = 1;
360                                 i++;
361                                 break;
362
363                         /*
364                          * Requiring Stylus Usage will ignore boot mouse
365                          * X/Y values and some cases of invalid Digitizer X/Y
366                          * values commonly reported.
367                          */
368                         case HID_USAGE_STYLUS:
369                                 pen = 1;
370                                 i++;
371                                 break;
372                         }
373                         break;
374
375                 case HID_COLLECTION_END:
376                         /* reset UsagePage and Finger */
377                         finger = usage = 0;
378                         break;
379
380                 case HID_COLLECTION:
381                         i++;
382                         switch (report[i]) {
383                         case HID_COLLECTION_LOGICAL:
384                                 i += wacom_parse_logical_collection(&report[i],
385                                                                     features);
386                                 break;
387                         }
388                         break;
389                 }
390         }
391
392  out:
393         result = 0;
394         kfree(report);
395         return result;
396 }
397
398 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
399 {
400         unsigned char *rep_data;
401         int limit = 0, report_id = 2;
402         int error = -ENOMEM;
403
404         rep_data = kmalloc(4, GFP_KERNEL);
405         if (!rep_data)
406                 return error;
407
408         /* ask to report tablet data if it is MT Tablet PC or
409          * not a Tablet PC */
410         if (features->type == TABLETPC2FG) {
411                 do {
412                         rep_data[0] = 3;
413                         rep_data[1] = 4;
414                         rep_data[2] = 0;
415                         rep_data[3] = 0;
416                         report_id = 3;
417                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
418                                                  report_id, rep_data, 4, 1);
419                         if (error >= 0)
420                                 error = wacom_get_report(intf,
421                                                 WAC_HID_FEATURE_REPORT,
422                                                 report_id, rep_data, 4, 1);
423                 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
424         } else if (features->type != TABLETPC &&
425                    features->device_type == BTN_TOOL_PEN) {
426                 do {
427                         rep_data[0] = 2;
428                         rep_data[1] = 2;
429                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
430                                                  report_id, rep_data, 2, 1);
431                         if (error >= 0)
432                                 error = wacom_get_report(intf,
433                                                 WAC_HID_FEATURE_REPORT,
434                                                 report_id, rep_data, 2, 1);
435                 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
436         }
437
438         kfree(rep_data);
439
440         return error < 0 ? error : 0;
441 }
442
443 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
444                 struct wacom_features *features)
445 {
446         int error = 0;
447         struct usb_host_interface *interface = intf->cur_altsetting;
448         struct hid_descriptor *hid_desc;
449
450         /* default features */
451         features->device_type = BTN_TOOL_PEN;
452         features->x_fuzz = 4;
453         features->y_fuzz = 4;
454         features->pressure_fuzz = 0;
455         features->distance_fuzz = 0;
456
457         /* only Tablet PCs and Bamboo P&T need to retrieve the info */
458         if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
459             (features->type != BAMBOO_PT))
460                 goto out;
461
462         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
463                 if (usb_get_extra_descriptor(&interface->endpoint[0],
464                                 HID_DEVICET_REPORT, &hid_desc)) {
465                         printk("wacom: can not retrieve extra class descriptor\n");
466                         error = 1;
467                         goto out;
468                 }
469         }
470         error = wacom_parse_hid(intf, hid_desc, features);
471         if (error)
472                 goto out;
473
474  out:
475         return error;
476 }
477
478 struct wacom_usbdev_data {
479         struct list_head list;
480         struct kref kref;
481         struct usb_device *dev;
482         struct wacom_shared shared;
483 };
484
485 static LIST_HEAD(wacom_udev_list);
486 static DEFINE_MUTEX(wacom_udev_list_lock);
487
488 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
489 {
490         struct wacom_usbdev_data *data;
491
492         list_for_each_entry(data, &wacom_udev_list, list) {
493                 if (data->dev == dev) {
494                         kref_get(&data->kref);
495                         return data;
496                 }
497         }
498
499         return NULL;
500 }
501
502 static int wacom_add_shared_data(struct wacom_wac *wacom,
503                                  struct usb_device *dev)
504 {
505         struct wacom_usbdev_data *data;
506         int retval = 0;
507
508         mutex_lock(&wacom_udev_list_lock);
509
510         data = wacom_get_usbdev_data(dev);
511         if (!data) {
512                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
513                 if (!data) {
514                         retval = -ENOMEM;
515                         goto out;
516                 }
517
518                 kref_init(&data->kref);
519                 data->dev = dev;
520                 list_add_tail(&data->list, &wacom_udev_list);
521         }
522
523         wacom->shared = &data->shared;
524
525 out:
526         mutex_unlock(&wacom_udev_list_lock);
527         return retval;
528 }
529
530 static void wacom_release_shared_data(struct kref *kref)
531 {
532         struct wacom_usbdev_data *data =
533                 container_of(kref, struct wacom_usbdev_data, kref);
534
535         mutex_lock(&wacom_udev_list_lock);
536         list_del(&data->list);
537         mutex_unlock(&wacom_udev_list_lock);
538
539         kfree(data);
540 }
541
542 static void wacom_remove_shared_data(struct wacom_wac *wacom)
543 {
544         struct wacom_usbdev_data *data;
545
546         if (wacom->shared) {
547                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
548                 kref_put(&data->kref, wacom_release_shared_data);
549                 wacom->shared = NULL;
550         }
551 }
552
553 static int wacom_led_control(struct wacom *wacom)
554 {
555         unsigned char *buf;
556         int retval, led = 0;
557
558         buf = kzalloc(9, GFP_KERNEL);
559         if (!buf)
560                 return -ENOMEM;
561
562         if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
563             wacom->wacom_wac.features.type == WACOM_24HD)
564                 led = (wacom->led.select[1] << 4) | 0x40;
565
566         led |=  wacom->led.select[0] | 0x4;
567
568         buf[0] = WAC_CMD_LED_CONTROL;
569         buf[1] = led;
570         buf[2] = wacom->led.llv;
571         buf[3] = wacom->led.hlv;
572         buf[4] = wacom->led.img_lum;
573
574         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
575                                   buf, 9, WAC_CMD_RETRIES);
576         kfree(buf);
577
578         return retval;
579 }
580
581 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
582 {
583         unsigned char *buf;
584         int i, retval;
585
586         buf = kzalloc(259, GFP_KERNEL);
587         if (!buf)
588                 return -ENOMEM;
589
590         /* Send 'start' command */
591         buf[0] = WAC_CMD_ICON_START;
592         buf[1] = 1;
593         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
594                                   buf, 2, WAC_CMD_RETRIES);
595         if (retval < 0)
596                 goto out;
597
598         buf[0] = WAC_CMD_ICON_XFER;
599         buf[1] = button_id & 0x07;
600         for (i = 0; i < 4; i++) {
601                 buf[2] = i;
602                 memcpy(buf + 3, img + i * 256, 256);
603
604                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
605                                           buf, 259, WAC_CMD_RETRIES);
606                 if (retval < 0)
607                         break;
608         }
609
610         /* Send 'stop' */
611         buf[0] = WAC_CMD_ICON_START;
612         buf[1] = 0;
613         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
614                          buf, 2, WAC_CMD_RETRIES);
615
616 out:
617         kfree(buf);
618         return retval;
619 }
620
621 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
622                                       const char *buf, size_t count)
623 {
624         struct wacom *wacom = dev_get_drvdata(dev);
625         unsigned int id;
626         int err;
627
628         err = kstrtouint(buf, 10, &id);
629         if (err)
630                 return err;
631
632         mutex_lock(&wacom->lock);
633
634         wacom->led.select[set_id] = id & 0x3;
635         err = wacom_led_control(wacom);
636
637         mutex_unlock(&wacom->lock);
638
639         return err < 0 ? err : count;
640 }
641
642 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
643 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
644         struct device_attribute *attr, const char *buf, size_t count)   \
645 {                                                                       \
646         return wacom_led_select_store(dev, SET_ID, buf, count);         \
647 }                                                                       \
648 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
649         struct device_attribute *attr, char *buf)                       \
650 {                                                                       \
651         struct wacom *wacom = dev_get_drvdata(dev);                     \
652         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
653 }                                                                       \
654 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
655                     wacom_led##SET_ID##_select_show,                    \
656                     wacom_led##SET_ID##_select_store)
657
658 DEVICE_LED_SELECT_ATTR(0);
659 DEVICE_LED_SELECT_ATTR(1);
660
661 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
662                                      const char *buf, size_t count)
663 {
664         unsigned int value;
665         int err;
666
667         err = kstrtouint(buf, 10, &value);
668         if (err)
669                 return err;
670
671         mutex_lock(&wacom->lock);
672
673         *dest = value & 0x7f;
674         err = wacom_led_control(wacom);
675
676         mutex_unlock(&wacom->lock);
677
678         return err < 0 ? err : count;
679 }
680
681 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
682 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
683         struct device_attribute *attr, const char *buf, size_t count)   \
684 {                                                                       \
685         struct wacom *wacom = dev_get_drvdata(dev);                     \
686                                                                         \
687         return wacom_luminance_store(wacom, &wacom->led.field,          \
688                                      buf, count);                       \
689 }                                                                       \
690 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
691                    NULL, wacom_##name##_luminance_store)
692
693 DEVICE_LUMINANCE_ATTR(status0, llv);
694 DEVICE_LUMINANCE_ATTR(status1, hlv);
695 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
696
697 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
698                                         const char *buf, size_t count)
699 {
700         struct wacom *wacom = dev_get_drvdata(dev);
701         int err;
702
703         if (count != 1024)
704                 return -EINVAL;
705
706         mutex_lock(&wacom->lock);
707
708         err = wacom_led_putimage(wacom, button_id, buf);
709
710         mutex_unlock(&wacom->lock);
711
712         return err < 0 ? err : count;
713 }
714
715 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
716 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
717         struct device_attribute *attr, const char *buf, size_t count)   \
718 {                                                                       \
719         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
720 }                                                                       \
721 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
722                    NULL, wacom_btnimg##BUTTON_ID##_store)
723
724 DEVICE_BTNIMG_ATTR(0);
725 DEVICE_BTNIMG_ATTR(1);
726 DEVICE_BTNIMG_ATTR(2);
727 DEVICE_BTNIMG_ATTR(3);
728 DEVICE_BTNIMG_ATTR(4);
729 DEVICE_BTNIMG_ATTR(5);
730 DEVICE_BTNIMG_ATTR(6);
731 DEVICE_BTNIMG_ATTR(7);
732
733 static struct attribute *cintiq_led_attrs[] = {
734         &dev_attr_status_led0_select.attr,
735         &dev_attr_status_led1_select.attr,
736         NULL
737 };
738
739 static struct attribute_group cintiq_led_attr_group = {
740         .name = "wacom_led",
741         .attrs = cintiq_led_attrs,
742 };
743
744 static struct attribute *intuos4_led_attrs[] = {
745         &dev_attr_status0_luminance.attr,
746         &dev_attr_status1_luminance.attr,
747         &dev_attr_status_led0_select.attr,
748         &dev_attr_buttons_luminance.attr,
749         &dev_attr_button0_rawimg.attr,
750         &dev_attr_button1_rawimg.attr,
751         &dev_attr_button2_rawimg.attr,
752         &dev_attr_button3_rawimg.attr,
753         &dev_attr_button4_rawimg.attr,
754         &dev_attr_button5_rawimg.attr,
755         &dev_attr_button6_rawimg.attr,
756         &dev_attr_button7_rawimg.attr,
757         NULL
758 };
759
760 static struct attribute_group intuos4_led_attr_group = {
761         .name = "wacom_led",
762         .attrs = intuos4_led_attrs,
763 };
764
765 static int wacom_initialize_leds(struct wacom *wacom)
766 {
767         int error;
768
769         /* Initialize default values */
770         switch (wacom->wacom_wac.features.type) {
771         case INTUOS4:
772         case INTUOS4L:
773                 wacom->led.select[0] = 0;
774                 wacom->led.select[1] = 0;
775                 wacom->led.llv = 10;
776                 wacom->led.hlv = 20;
777                 wacom->led.img_lum = 10;
778                 error = sysfs_create_group(&wacom->intf->dev.kobj,
779                                            &intuos4_led_attr_group);
780                 break;
781
782         case WACOM_24HD:
783         case WACOM_21UX2:
784                 wacom->led.select[0] = 0;
785                 wacom->led.select[1] = 0;
786                 wacom->led.llv = 0;
787                 wacom->led.hlv = 0;
788                 wacom->led.img_lum = 0;
789
790                 error = sysfs_create_group(&wacom->intf->dev.kobj,
791                                            &cintiq_led_attr_group);
792                 break;
793
794         default:
795                 return 0;
796         }
797
798         if (error) {
799                 dev_err(&wacom->intf->dev,
800                         "cannot create sysfs group err: %d\n", error);
801                 return error;
802         }
803         wacom_led_control(wacom);
804
805         return 0;
806 }
807
808 static void wacom_destroy_leds(struct wacom *wacom)
809 {
810         switch (wacom->wacom_wac.features.type) {
811         case INTUOS4:
812         case INTUOS4L:
813                 sysfs_remove_group(&wacom->intf->dev.kobj,
814                                    &intuos4_led_attr_group);
815                 break;
816
817         case WACOM_24HD:
818         case WACOM_21UX2:
819                 sysfs_remove_group(&wacom->intf->dev.kobj,
820                                    &cintiq_led_attr_group);
821                 break;
822         }
823 }
824
825 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
826 {
827         struct usb_device *dev = interface_to_usbdev(intf);
828         struct usb_endpoint_descriptor *endpoint;
829         struct wacom *wacom;
830         struct wacom_wac *wacom_wac;
831         struct wacom_features *features;
832         struct input_dev *input_dev;
833         int error;
834
835         if (!id->driver_info)
836                 return -EINVAL;
837
838         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
839         input_dev = input_allocate_device();
840         if (!wacom || !input_dev) {
841                 error = -ENOMEM;
842                 goto fail1;
843         }
844
845         wacom_wac = &wacom->wacom_wac;
846         wacom_wac->features = *((struct wacom_features *)id->driver_info);
847         features = &wacom_wac->features;
848         if (features->pktlen > WACOM_PKGLEN_MAX) {
849                 error = -EINVAL;
850                 goto fail1;
851         }
852
853         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
854                                              GFP_KERNEL, &wacom->data_dma);
855         if (!wacom_wac->data) {
856                 error = -ENOMEM;
857                 goto fail1;
858         }
859
860         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
861         if (!wacom->irq) {
862                 error = -ENOMEM;
863                 goto fail2;
864         }
865
866         wacom->usbdev = dev;
867         wacom->intf = intf;
868         mutex_init(&wacom->lock);
869         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
870         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
871
872         wacom_wac->input = input_dev;
873
874         endpoint = &intf->cur_altsetting->endpoint[0].desc;
875
876         /* Retrieve the physical and logical size for OEM devices */
877         error = wacom_retrieve_hid_descriptor(intf, features);
878         if (error)
879                 goto fail3;
880
881         wacom_setup_device_quirks(features);
882
883         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
884
885         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
886                 /* Append the device type to the name */
887                 strlcat(wacom_wac->name,
888                         features->device_type == BTN_TOOL_PEN ?
889                                 " Pen" : " Finger",
890                         sizeof(wacom_wac->name));
891
892                 error = wacom_add_shared_data(wacom_wac, dev);
893                 if (error)
894                         goto fail3;
895         }
896
897         input_dev->name = wacom_wac->name;
898         input_dev->dev.parent = &intf->dev;
899         input_dev->open = wacom_open;
900         input_dev->close = wacom_close;
901         usb_to_input_id(dev, &input_dev->id);
902         input_set_drvdata(input_dev, wacom);
903
904         wacom_setup_input_capabilities(input_dev, wacom_wac);
905
906         usb_fill_int_urb(wacom->irq, dev,
907                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
908                          wacom_wac->data, features->pktlen,
909                          wacom_sys_irq, wacom, endpoint->bInterval);
910         wacom->irq->transfer_dma = wacom->data_dma;
911         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
912
913         error = wacom_initialize_leds(wacom);
914         if (error)
915                 goto fail4;
916
917         error = input_register_device(input_dev);
918         if (error)
919                 goto fail5;
920
921         /* Note that if query fails it is not a hard failure */
922         wacom_query_tablet_data(intf, features);
923
924         usb_set_intfdata(intf, wacom);
925         return 0;
926
927  fail5: wacom_destroy_leds(wacom);
928  fail4: wacom_remove_shared_data(wacom_wac);
929  fail3: usb_free_urb(wacom->irq);
930  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
931  fail1: input_free_device(input_dev);
932         kfree(wacom);
933         return error;
934 }
935
936 static void wacom_disconnect(struct usb_interface *intf)
937 {
938         struct wacom *wacom = usb_get_intfdata(intf);
939
940         usb_set_intfdata(intf, NULL);
941
942         usb_kill_urb(wacom->irq);
943         input_unregister_device(wacom->wacom_wac.input);
944         wacom_destroy_leds(wacom);
945         usb_free_urb(wacom->irq);
946         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
947                         wacom->wacom_wac.data, wacom->data_dma);
948         wacom_remove_shared_data(&wacom->wacom_wac);
949         kfree(wacom);
950 }
951
952 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
953 {
954         struct wacom *wacom = usb_get_intfdata(intf);
955
956         mutex_lock(&wacom->lock);
957         usb_kill_urb(wacom->irq);
958         mutex_unlock(&wacom->lock);
959
960         return 0;
961 }
962
963 static int wacom_resume(struct usb_interface *intf)
964 {
965         struct wacom *wacom = usb_get_intfdata(intf);
966         struct wacom_features *features = &wacom->wacom_wac.features;
967         int rv = 0;
968
969         mutex_lock(&wacom->lock);
970
971         /* switch to wacom mode first */
972         wacom_query_tablet_data(intf, features);
973         wacom_led_control(wacom);
974
975         if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
976                 rv = -EIO;
977
978         mutex_unlock(&wacom->lock);
979
980         return rv;
981 }
982
983 static int wacom_reset_resume(struct usb_interface *intf)
984 {
985         return wacom_resume(intf);
986 }
987
988 static struct usb_driver wacom_driver = {
989         .name =         "wacom",
990         .id_table =     wacom_ids,
991         .probe =        wacom_probe,
992         .disconnect =   wacom_disconnect,
993         .suspend =      wacom_suspend,
994         .resume =       wacom_resume,
995         .reset_resume = wacom_reset_resume,
996         .supports_autosuspend = 1,
997 };
998
999 module_usb_driver(wacom_driver);