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Diffstat (limited to 'usr/src/dkms_source_tree/wacom_sys.c')
-rw-r--r--usr/src/dkms_source_tree/wacom_sys.c624
1 files changed, 624 insertions, 0 deletions
diff --git a/usr/src/dkms_source_tree/wacom_sys.c b/usr/src/dkms_source_tree/wacom_sys.c
new file mode 100644
index 0000000..42ba369
--- /dev/null
+++ b/usr/src/dkms_source_tree/wacom_sys.c
@@ -0,0 +1,624 @@
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
33enum {
34 WCM_UNDEFINED = 0,
35 WCM_DESKTOP,
36 WCM_DIGITIZER,
37};
38
39struct 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#define WAC_HID_FEATURE_REPORT 0x03
52
53static int usb_get_report(struct usb_interface *intf, unsigned char type,
54 unsigned char id, void *buf, int size)
55{
56 return usb_control_msg(interface_to_usbdev(intf),
57 usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
58 USB_REQ_GET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
59 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
60 buf, size, 100);
61}
62
63static int usb_set_report(struct usb_interface *intf, unsigned char type,
64 unsigned char id, void *buf, int size)
65{
66 return usb_control_msg(interface_to_usbdev(intf),
67 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
68 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
69 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
70 buf, size, 1000);
71}
72
73static void wacom_sys_irq(struct urb *urb)
74{
75 struct wacom *wacom = urb->context;
76 int retval;
77
78 switch (urb->status) {
79 case 0:
80 /* success */
81 break;
82 case -ECONNRESET:
83 case -ENOENT:
84 case -ESHUTDOWN:
85 /* this urb is terminated, clean up */
86 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
87 return;
88 default:
89 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
90 goto exit;
91 }
92
93 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
94
95 exit:
96 usb_mark_last_busy(wacom->usbdev);
97 retval = usb_submit_urb(urb, GFP_ATOMIC);
98 if (retval)
99 err ("%s - usb_submit_urb failed with result %d",
100 __func__, retval);
101}
102
103static int wacom_open(struct input_dev *dev)
104{
105 struct wacom *wacom = input_get_drvdata(dev);
106
107 mutex_lock(&wacom->lock);
108
109 wacom->irq->dev = wacom->usbdev;
110
111 if (usb_autopm_get_interface(wacom->intf) < 0) {
112 mutex_unlock(&wacom->lock);
113 return -EIO;
114 }
115
116 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
117 usb_autopm_put_interface(wacom->intf);
118 mutex_unlock(&wacom->lock);
119 return -EIO;
120 }
121
122 wacom->open = true;
123 wacom->intf->needs_remote_wakeup = 1;
124
125 mutex_unlock(&wacom->lock);
126 return 0;
127}
128
129static void wacom_close(struct input_dev *dev)
130{
131 struct wacom *wacom = input_get_drvdata(dev);
132
133 mutex_lock(&wacom->lock);
134 usb_kill_urb(wacom->irq);
135 wacom->open = false;
136 wacom->intf->needs_remote_wakeup = 0;
137 mutex_unlock(&wacom->lock);
138}
139
140static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
141 struct wacom_features *features)
142{
143 struct usb_device *dev = interface_to_usbdev(intf);
144 char limit = 0;
145 /* result has to be defined as int for some devices */
146 int result = 0;
147 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
148 unsigned char *report;
149
150 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
151 if (!report)
152 return -ENOMEM;
153
154 /* retrive report descriptors */
155 do {
156 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
157 USB_REQ_GET_DESCRIPTOR,
158 USB_RECIP_INTERFACE | USB_DIR_IN,
159 HID_DEVICET_REPORT << 8,
160 intf->altsetting[0].desc.bInterfaceNumber, /* interface */
161 report,
162 hid_desc->wDescriptorLength,
163 5000); /* 5 secs */
164 } while (result < 0 && limit++ < 5);
165
166 /* No need to parse the Descriptor. It isn't an error though */
167 if (result < 0)
168 goto out;
169
170 for (i = 0; i < hid_desc->wDescriptorLength; i++) {
171
172 switch (report[i]) {
173 case HID_USAGE_PAGE:
174 switch (report[i + 1]) {
175 case HID_USAGE_PAGE_DIGITIZER:
176 usage = WCM_DIGITIZER;
177 i++;
178 break;
179
180 case HID_USAGE_PAGE_DESKTOP:
181 usage = WCM_DESKTOP;
182 i++;
183 break;
184 }
185 break;
186
187 case HID_USAGE:
188 switch (report[i + 1]) {
189 case HID_USAGE_X:
190 if (usage == WCM_DESKTOP) {
191 if (finger) {
192 features->device_type = BTN_TOOL_DOUBLETAP;
193 if (features->type == TABLETPC2FG) {
194 /* need to reset back */
195 features->pktlen = WACOM_PKGLEN_TPC2FG;
196 features->device_type = BTN_TOOL_TRIPLETAP;
197 }
198 features->x_max =
199 get_unaligned_le16(&report[i + 3]);
200 features->x_phy =
201 get_unaligned_le16(&report[i + 6]);
202 features->unit = report[i + 9];
203 features->unitExpo = report[i + 11];
204 i += 12;
205 } else if (pen) {
206 /* penabled only accepts exact bytes of data */
207 if (features->type == TABLETPC2FG)
208 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
209 features->device_type = BTN_TOOL_PEN;
210 features->x_max =
211 get_unaligned_le16(&report[i + 3]);
212 i += 4;
213 }
214 } else if (usage == WCM_DIGITIZER) {
215 /* max pressure isn't reported
216 features->pressure_max = (unsigned short)
217 (report[i+4] << 8 | report[i + 3]);
218 */
219 features->pressure_max = 255;
220 i += 4;
221 }
222 break;
223
224 case HID_USAGE_Y:
225 if (usage == WCM_DESKTOP) {
226 if (finger) {
227 features->device_type = BTN_TOOL_DOUBLETAP;
228 if (features->type == TABLETPC2FG) {
229 /* need to reset back */
230 features->pktlen = WACOM_PKGLEN_TPC2FG;
231 features->device_type = BTN_TOOL_TRIPLETAP;
232 features->y_max =
233 get_unaligned_le16(&report[i + 3]);
234 features->y_phy =
235 get_unaligned_le16(&report[i + 6]);
236 i += 7;
237 } else {
238 features->y_max =
239 features->x_max;
240 features->y_phy =
241 get_unaligned_le16(&report[i + 3]);
242 i += 4;
243 }
244 } else if (pen) {
245 /* penabled only accepts exact bytes of data */
246 if (features->type == TABLETPC2FG)
247 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
248 features->device_type = BTN_TOOL_PEN;
249 features->y_max =
250 get_unaligned_le16(&report[i + 3]);
251 i += 4;
252 }
253 }
254 break;
255
256 case HID_USAGE_FINGER:
257 finger = 1;
258 i++;
259 break;
260
261 case HID_USAGE_STYLUS:
262 pen = 1;
263 i++;
264 break;
265
266 case HID_USAGE_UNDEFINED:
267 if (usage == WCM_DESKTOP && finger) /* capacity */
268 features->pressure_max =
269 get_unaligned_le16(&report[i + 3]);
270 i += 4;
271 break;
272 }
273 break;
274
275 case HID_COLLECTION:
276 /* reset UsagePage and Finger */
277 finger = usage = 0;
278 break;
279 }
280 }
281
282 out:
283 result = 0;
284 kfree(report);
285 return result;
286}
287
288static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
289{
290 unsigned char *rep_data;
291 int limit = 0, report_id = 2;
292 int error = -ENOMEM;
293
294 rep_data = kmalloc(2, GFP_KERNEL);
295 if (!rep_data)
296 return error;
297
298 /* ask to report tablet data if it is 2FGT or not a Tablet PC */
299 if (features->device_type == BTN_TOOL_TRIPLETAP) {
300 do {
301 rep_data[0] = 3;
302 rep_data[1] = 4;
303 report_id = 3;
304 error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
305 report_id, rep_data, 2);
306 if (error >= 0)
307 error = usb_get_report(intf,
308 WAC_HID_FEATURE_REPORT, report_id,
309 rep_data, 3);
310 } while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
311 } else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
312 do {
313 rep_data[0] = 2;
314 rep_data[1] = 2;
315 error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
316 report_id, rep_data, 2);
317 if (error >= 0)
318 error = usb_get_report(intf,
319 WAC_HID_FEATURE_REPORT, report_id,
320 rep_data, 2);
321 } while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
322 }
323
324 kfree(rep_data);
325
326 return error < 0 ? error : 0;
327}
328
329static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
330 struct wacom_features *features)
331{
332 int error = 0;
333 struct usb_host_interface *interface = intf->cur_altsetting;
334 struct hid_descriptor *hid_desc;
335
336 /* default device to penabled */
337 features->device_type = BTN_TOOL_PEN;
338
339 /* only Tablet PCs need to retrieve the info */
340 if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
341 goto out;
342
343 if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
344 if (usb_get_extra_descriptor(&interface->endpoint[0],
345 HID_DEVICET_REPORT, &hid_desc)) {
346 printk("wacom: can not retrieve extra class descriptor\n");
347 error = 1;
348 goto out;
349 }
350 }
351 error = wacom_parse_hid(intf, hid_desc, features);
352 if (error)
353 goto out;
354
355 /* touch device found but size is not defined. use default */
356 if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
357 features->x_max = 1023;
358 features->y_max = 1023;
359 }
360
361 out:
362 return error;
363}
364
365struct wacom_usbdev_data {
366 struct list_head list;
367 struct kref kref;
368 struct usb_device *dev;
369 struct wacom_shared shared;
370};
371
372static LIST_HEAD(wacom_udev_list);
373static DEFINE_MUTEX(wacom_udev_list_lock);
374
375static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
376{
377 struct wacom_usbdev_data *data;
378
379 list_for_each_entry(data, &wacom_udev_list, list) {
380 if (data->dev == dev) {
381 kref_get(&data->kref);
382 return data;
383 }
384 }
385
386 return NULL;
387}
388
389static int wacom_add_shared_data(struct wacom_wac *wacom,
390 struct usb_device *dev)
391{
392 struct wacom_usbdev_data *data;
393 int retval = 0;
394
395 mutex_lock(&wacom_udev_list_lock);
396
397 data = wacom_get_usbdev_data(dev);
398 if (!data) {
399 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
400 if (!data) {
401 retval = -ENOMEM;
402 goto out;
403 }
404
405 kref_init(&data->kref);
406 data->dev = dev;
407 list_add_tail(&data->list, &wacom_udev_list);
408 }
409
410 wacom->shared = &data->shared;
411
412out:
413 mutex_unlock(&wacom_udev_list_lock);
414 return retval;
415}
416
417static void wacom_release_shared_data(struct kref *kref)
418{
419 struct wacom_usbdev_data *data =
420 container_of(kref, struct wacom_usbdev_data, kref);
421
422 mutex_lock(&wacom_udev_list_lock);
423 list_del(&data->list);
424 mutex_unlock(&wacom_udev_list_lock);
425
426 kfree(data);
427}
428
429static void wacom_remove_shared_data(struct wacom_wac *wacom)
430{
431 struct wacom_usbdev_data *data;
432
433 if (wacom->shared) {
434 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
435 kref_put(&data->kref, wacom_release_shared_data);
436 wacom->shared = NULL;
437 }
438}
439
440static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
441{
442 struct usb_device *dev = interface_to_usbdev(intf);
443 struct usb_endpoint_descriptor *endpoint;
444 struct wacom *wacom;
445 struct wacom_wac *wacom_wac;
446 struct wacom_features *features;
447 struct input_dev *input_dev;
448 int error;
449
450 if (!id->driver_info)
451 return -EINVAL;
452
453 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
454 input_dev = input_allocate_device();
455 if (!wacom || !input_dev) {
456 error = -ENOMEM;
457 goto fail1;
458 }
459
460 wacom_wac = &wacom->wacom_wac;
461 wacom_wac->features = *((struct wacom_features *)id->driver_info);
462 features = &wacom_wac->features;
463 if (features->pktlen > WACOM_PKGLEN_MAX) {
464 error = -EINVAL;
465 goto fail1;
466 }
467
468 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
469 GFP_KERNEL, &wacom->data_dma);
470 if (!wacom_wac->data) {
471 error = -ENOMEM;
472 goto fail1;
473 }
474
475 wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
476 if (!wacom->irq) {
477 error = -ENOMEM;
478 goto fail2;
479 }
480
481 wacom->usbdev = dev;
482 wacom->intf = intf;
483 mutex_init(&wacom->lock);
484 usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
485 strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
486
487 wacom_wac->input = input_dev;
488
489 endpoint = &intf->cur_altsetting->endpoint[0].desc;
490
491 /* Retrieve the physical and logical size for OEM devices */
492 error = wacom_retrieve_hid_descriptor(intf, features);
493 if (error)
494 goto fail2;
495
496 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
497
498 if (features->type == TABLETPC || features->type == TABLETPC2FG) {
499 /* Append the device type to the name */
500 strlcat(wacom_wac->name,
501 features->device_type == BTN_TOOL_PEN ?
502 " Pen" : " Finger",
503 sizeof(wacom_wac->name));
504
505 error = wacom_add_shared_data(wacom_wac, dev);
506 if (error)
507 goto fail3;
508 }
509
510 input_dev->name = wacom_wac->name;
511 input_dev->dev.parent = &intf->dev;
512 input_dev->open = wacom_open;
513 input_dev->close = wacom_close;
514 usb_to_input_id(dev, &input_dev->id);
515 input_set_drvdata(input_dev, wacom);
516
517 wacom_setup_input_capabilities(input_dev, wacom_wac);
518
519 usb_fill_int_urb(wacom->irq, dev,
520 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
521 wacom_wac->data, features->pktlen,
522 wacom_sys_irq, wacom, endpoint->bInterval);
523 wacom->irq->transfer_dma = wacom->data_dma;
524 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
525
526 error = input_register_device(input_dev);
527 if (error)
528 goto fail4;
529
530 /* Note that if query fails it is not a hard failure */
531 wacom_query_tablet_data(intf, features);
532
533 usb_set_intfdata(intf, wacom);
534 return 0;
535
536 fail4: wacom_remove_shared_data(wacom_wac);
537 fail3: usb_free_urb(wacom->irq);
538 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
539 fail1: input_free_device(input_dev);
540 kfree(wacom);
541 return error;
542}
543
544static void wacom_disconnect(struct usb_interface *intf)
545{
546 struct wacom *wacom = usb_get_intfdata(intf);
547
548 usb_set_intfdata(intf, NULL);
549
550 usb_kill_urb(wacom->irq);
551 input_unregister_device(wacom->wacom_wac.input);
552 usb_free_urb(wacom->irq);
553 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
554 wacom->wacom_wac.data, wacom->data_dma);
555 wacom_remove_shared_data(&wacom->wacom_wac);
556 kfree(wacom);
557}
558
559static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
560{
561 struct wacom *wacom = usb_get_intfdata(intf);
562
563 mutex_lock(&wacom->lock);
564 usb_kill_urb(wacom->irq);
565 mutex_unlock(&wacom->lock);
566
567 return 0;
568}
569
570static int wacom_resume(struct usb_interface *intf)
571{
572 struct wacom *wacom = usb_get_intfdata(intf);
573 struct wacom_features *features = &wacom->wacom_wac.features;
574 int rv;
575
576 mutex_lock(&wacom->lock);
577
578 /* switch to wacom mode first */
579 wacom_query_tablet_data(intf, features);
580
581 if (wacom->open)
582 rv = usb_submit_urb(wacom->irq, GFP_NOIO);
583 else
584 rv = 0;
585
586 mutex_unlock(&wacom->lock);
587
588 return rv;
589}
590
591static int wacom_reset_resume(struct usb_interface *intf)
592{
593 return wacom_resume(intf);
594}
595
596static struct usb_driver wacom_driver = {
597 .name = "wacom",
598 .id_table = wacom_ids,
599 .probe = wacom_probe,
600 .disconnect = wacom_disconnect,
601 .suspend = wacom_suspend,
602 .resume = wacom_resume,
603 .reset_resume = wacom_reset_resume,
604 .supports_autosuspend = 1,
605};
606
607static int __init wacom_init(void)
608{
609 int result;
610
611 result = usb_register(&wacom_driver);
612 if (result == 0)
613 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
614 DRIVER_DESC "\n");
615 return result;
616}
617
618static void __exit wacom_exit(void)
619{
620 usb_deregister(&wacom_driver);
621}
622
623module_init(wacom_init);
624module_exit(wacom_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2026-09-20 20:02:31 +0000