tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Bluetooth Wacom Tablet support
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2007 Jiri Kosina
8 * Copyright (c) 2007 Paul Walmsley
9 * Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
10 * Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
11 * Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
12 * Copyright (c) 2011 Przemysław Firszt <przemo@firszt.eu>
13 */
14
15/*
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the Free
18 * Software Foundation; either version 2 of the License, or (at your option)
19 * any later version.
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/device.h>
25#include <linux/hid.h>
26#include <linux/module.h>
27#include <linux/slab.h>
28#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
29#include <linux/power_supply.h>
30#endif
31
32#include "hid-ids.h"
33
34struct wacom_data {
35 __u16 tool;
36 unsigned char butstate;
37 __u8 features;
38 unsigned char high_speed;
39#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
40 int battery_capacity;
41 struct power_supply battery;
42 struct power_supply ac;
43#endif
44};
45
46#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
47/*percent of battery capacity, 0 means AC online*/
48static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
49
50static enum power_supply_property wacom_battery_props[] = {
51 POWER_SUPPLY_PROP_PRESENT,
52 POWER_SUPPLY_PROP_CAPACITY,
53 POWER_SUPPLY_PROP_SCOPE,
54};
55
56static enum power_supply_property wacom_ac_props[] = {
57 POWER_SUPPLY_PROP_PRESENT,
58 POWER_SUPPLY_PROP_ONLINE,
59 POWER_SUPPLY_PROP_SCOPE,
60};
61
62static int wacom_battery_get_property(struct power_supply *psy,
63 enum power_supply_property psp,
64 union power_supply_propval *val)
65{
66 struct wacom_data *wdata = container_of(psy,
67 struct wacom_data, battery);
68 int power_state = batcap[wdata->battery_capacity];
69 int ret = 0;
70
71 switch (psp) {
72 case POWER_SUPPLY_PROP_PRESENT:
73 val->intval = 1;
74 break;
75 case POWER_SUPPLY_PROP_SCOPE:
76 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
77 break;
78 case POWER_SUPPLY_PROP_CAPACITY:
79 /* show 100% battery capacity when charging */
80 if (power_state == 0)
81 val->intval = 100;
82 else
83 val->intval = power_state;
84 break;
85 default:
86 ret = -EINVAL;
87 break;
88 }
89 return ret;
90}
91
92static int wacom_ac_get_property(struct power_supply *psy,
93 enum power_supply_property psp,
94 union power_supply_propval *val)
95{
96 struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
97 int power_state = batcap[wdata->battery_capacity];
98 int ret = 0;
99
100 switch (psp) {
101 case POWER_SUPPLY_PROP_PRESENT:
102 /* fall through */
103 case POWER_SUPPLY_PROP_ONLINE:
104 if (power_state == 0)
105 val->intval = 1;
106 else
107 val->intval = 0;
108 break;
109 case POWER_SUPPLY_PROP_SCOPE:
110 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
111 break;
112 default:
113 ret = -EINVAL;
114 break;
115 }
116 return ret;
117}
118#endif
119
120static void wacom_set_features(struct hid_device *hdev)
121{
122 int ret;
123 __u8 rep_data[2];
124
125 /*set high speed, tablet mode*/
126 rep_data[0] = 0x03;
127 rep_data[1] = 0x20;
128 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
129 HID_FEATURE_REPORT);
130 return;
131}
132
133static void wacom_poke(struct hid_device *hdev, u8 speed)
134{
135 struct wacom_data *wdata = hid_get_drvdata(hdev);
136 int limit, ret;
137 char rep_data[2];
138
139 rep_data[0] = 0x03 ; rep_data[1] = 0x00;
140 limit = 3;
141 do {
142 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
143 HID_FEATURE_REPORT);
144 } while (ret < 0 && limit-- > 0);
145
146 if (ret >= 0) {
147 if (speed == 0)
148 rep_data[0] = 0x05;
149 else
150 rep_data[0] = 0x06;
151
152 rep_data[1] = 0x00;
153 limit = 3;
154 do {
155 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
156 HID_FEATURE_REPORT);
157 } while (ret < 0 && limit-- > 0);
158
159 if (ret >= 0) {
160 wdata->high_speed = speed;
161 return;
162 }
163 }
164
165 /*
166 * Note that if the raw queries fail, it's not a hard failure and it
167 * is safe to continue
168 */
169 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
170 rep_data[0], ret);
171 return;
172}
173
174static ssize_t wacom_show_speed(struct device *dev,
175 struct device_attribute
176 *attr, char *buf)
177{
178 struct wacom_data *wdata = dev_get_drvdata(dev);
179
180 return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
181}
182
183static ssize_t wacom_store_speed(struct device *dev,
184 struct device_attribute *attr,
185 const char *buf, size_t count)
186{
187 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
188 int new_speed;
189
190 if (sscanf(buf, "%1d", &new_speed ) != 1)
191 return -EINVAL;
192
193 if (new_speed == 0 || new_speed == 1) {
194 wacom_poke(hdev, new_speed);
195 return strnlen(buf, PAGE_SIZE);
196 } else
197 return -EINVAL;
198}
199
200static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
201 wacom_show_speed, wacom_store_speed);
202
203static int wacom_gr_parse_report(struct hid_device *hdev,
204 struct wacom_data *wdata,
205 struct input_dev *input, unsigned char *data)
206{
207 int tool, x, y, rw;
208
209 tool = 0;
210 /* Get X & Y positions */
211 x = le16_to_cpu(*(__le16 *) &data[2]);
212 y = le16_to_cpu(*(__le16 *) &data[4]);
213
214 /* Get current tool identifier */
215 if (data[1] & 0x90) { /* If pen is in the in/active area */
216 switch ((data[1] >> 5) & 3) {
217 case 0: /* Pen */
218 tool = BTN_TOOL_PEN;
219 break;
220
221 case 1: /* Rubber */
222 tool = BTN_TOOL_RUBBER;
223 break;
224
225 case 2: /* Mouse with wheel */
226 case 3: /* Mouse without wheel */
227 tool = BTN_TOOL_MOUSE;
228 break;
229 }
230
231 /* Reset tool if out of active tablet area */
232 if (!(data[1] & 0x10))
233 tool = 0;
234 }
235
236 /* If tool changed, notify input subsystem */
237 if (wdata->tool != tool) {
238 if (wdata->tool) {
239 /* Completely reset old tool state */
240 if (wdata->tool == BTN_TOOL_MOUSE) {
241 input_report_key(input, BTN_LEFT, 0);
242 input_report_key(input, BTN_RIGHT, 0);
243 input_report_key(input, BTN_MIDDLE, 0);
244 input_report_abs(input, ABS_DISTANCE,
245 input_abs_get_max(input, ABS_DISTANCE));
246 } else {
247 input_report_key(input, BTN_TOUCH, 0);
248 input_report_key(input, BTN_STYLUS, 0);
249 input_report_key(input, BTN_STYLUS2, 0);
250 input_report_abs(input, ABS_PRESSURE, 0);
251 }
252 input_report_key(input, wdata->tool, 0);
253 input_sync(input);
254 }
255 wdata->tool = tool;
256 if (tool)
257 input_report_key(input, tool, 1);
258 }
259
260 if (tool) {
261 input_report_abs(input, ABS_X, x);
262 input_report_abs(input, ABS_Y, y);
263
264 switch ((data[1] >> 5) & 3) {
265 case 2: /* Mouse with wheel */
266 input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
267 rw = (data[6] & 0x01) ? -1 :
268 (data[6] & 0x02) ? 1 : 0;
269 input_report_rel(input, REL_WHEEL, rw);
270 /* fall through */
271
272 case 3: /* Mouse without wheel */
273 input_report_key(input, BTN_LEFT, data[1] & 0x01);
274 input_report_key(input, BTN_RIGHT, data[1] & 0x02);
275 /* Compute distance between mouse and tablet */
276 rw = 44 - (data[6] >> 2);
277 if (rw < 0)
278 rw = 0;
279 else if (rw > 31)
280 rw = 31;
281 input_report_abs(input, ABS_DISTANCE, rw);
282 break;
283
284 default:
285 input_report_abs(input, ABS_PRESSURE,
286 data[6] | (((__u16) (data[1] & 0x08)) << 5));
287 input_report_key(input, BTN_TOUCH, data[1] & 0x01);
288 input_report_key(input, BTN_STYLUS, data[1] & 0x02);
289 input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
290 break;
291 }
292
293 input_sync(input);
294 }
295
296 /* Report the state of the two buttons at the top of the tablet
297 * as two extra fingerpad keys (buttons 4 & 5). */
298 rw = data[7] & 0x03;
299 if (rw != wdata->butstate) {
300 wdata->butstate = rw;
301 input_report_key(input, BTN_0, rw & 0x02);
302 input_report_key(input, BTN_1, rw & 0x01);
303 input_report_key(input, BTN_TOOL_FINGER, 0xf0);
304 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
305 input_sync(input);
306 }
307
308#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
309 /* Store current battery capacity */
310 rw = (data[7] >> 2 & 0x07);
311 if (rw != wdata->battery_capacity)
312 wdata->battery_capacity = rw;
313#endif
314 return 1;
315}
316
317static void wacom_i4_parse_pen_report(struct wacom_data *wdata,
318 struct input_dev *input, unsigned char *data)
319{
320 __u16 x, y, pressure;
321 __u32 id;
322
323 switch (data[1]) {
324 case 0x80: /* Out of proximity report */
325 wdata->tool = 0;
326 input_report_key(input, BTN_TOUCH, 0);
327 input_report_abs(input, ABS_PRESSURE, 0);
328 input_report_key(input, wdata->tool, 0);
329 input_sync(input);
330 break;
331 case 0xC2: /* Tool report */
332 id = ((data[2] << 4) | (data[3] >> 4) |
333 ((data[7] & 0x0f) << 20) |
334 ((data[8] & 0xf0) << 12)) & 0xfffff;
335
336 switch (id) {
337 case 0x802:
338 wdata->tool = BTN_TOOL_PEN;
339 break;
340 case 0x80A:
341 wdata->tool = BTN_TOOL_RUBBER;
342 break;
343 }
344 break;
345 default: /* Position/pressure report */
346 x = data[2] << 9 | data[3] << 1 | ((data[9] & 0x02) >> 1);
347 y = data[4] << 9 | data[5] << 1 | (data[9] & 0x01);
348 pressure = (data[6] << 3) | ((data[7] & 0xC0) >> 5)
349 | (data[1] & 0x01);
350
351 input_report_key(input, BTN_TOUCH, pressure > 1);
352
353 input_report_key(input, BTN_STYLUS, data[1] & 0x02);
354 input_report_key(input, BTN_STYLUS2, data[1] & 0x04);
355 input_report_key(input, wdata->tool, 1);
356 input_report_abs(input, ABS_X, x);
357 input_report_abs(input, ABS_Y, y);
358 input_report_abs(input, ABS_PRESSURE, pressure);
359 input_sync(input);
360 break;
361 }
362
363 return;
364}
365
366static void wacom_i4_parse_report(struct hid_device *hdev,
367 struct wacom_data *wdata,
368 struct input_dev *input, unsigned char *data)
369{
370 switch (data[0]) {
371 case 0x00: /* Empty report */
372 break;
373 case 0x02: /* Pen report */
374 wacom_i4_parse_pen_report(wdata, input, data);
375 break;
376 case 0x03: /* Features Report */
377 wdata->features = data[2];
378 break;
379 case 0x0C: /* Button report */
380 break;
381 default:
382 hid_err(hdev, "Unknown report: %d,%d\n", data[0], data[1]);
383 break;
384 }
385}
386
387static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
388 u8 *raw_data, int size)
389{
390 struct wacom_data *wdata = hid_get_drvdata(hdev);
391 struct hid_input *hidinput;
392 struct input_dev *input;
393 unsigned char *data = (unsigned char *) raw_data;
394 int i;
395
396 if (!(hdev->claimed & HID_CLAIMED_INPUT))
397 return 0;
398
399 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
400 input = hidinput->input;
401
402 /* Check if this is a tablet report */
403 if (data[0] != 0x03)
404 return 0;
405
406 switch (hdev->product) {
407 case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
408 return wacom_gr_parse_report(hdev, wdata, input, data);
409 break;
410 case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
411 i = 1;
412
413 switch (data[0]) {
414 case 0x04:
415 wacom_i4_parse_report(hdev, wdata, input, data + i);
416 i += 10;
417 /* fall through */
418 case 0x03:
419 wacom_i4_parse_report(hdev, wdata, input, data + i);
420 i += 10;
421 wacom_i4_parse_report(hdev, wdata, input, data + i);
422 break;
423 default:
424 hid_err(hdev, "Unknown report: %d,%d size:%d\n",
425 data[0], data[1], size);
426 return 0;
427 }
428 }
429 return 1;
430}
431
432static int wacom_input_mapped(struct hid_device *hdev, struct hid_input *hi,
433 struct hid_field *field, struct hid_usage *usage, unsigned long **bit,
434 int *max)
435{
436 struct input_dev *input = hi->input;
437
438 __set_bit(INPUT_PROP_POINTER, input->propbit);
439
440 /* Basics */
441 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
442
443 __set_bit(REL_WHEEL, input->relbit);
444
445 __set_bit(BTN_TOOL_PEN, input->keybit);
446 __set_bit(BTN_TOUCH, input->keybit);
447 __set_bit(BTN_STYLUS, input->keybit);
448 __set_bit(BTN_STYLUS2, input->keybit);
449 __set_bit(BTN_LEFT, input->keybit);
450 __set_bit(BTN_RIGHT, input->keybit);
451 __set_bit(BTN_MIDDLE, input->keybit);
452
453 /* Pad */
454 input->evbit[0] |= BIT(EV_MSC);
455
456 __set_bit(MSC_SERIAL, input->mscbit);
457
458 __set_bit(BTN_0, input->keybit);
459 __set_bit(BTN_1, input->keybit);
460 __set_bit(BTN_TOOL_FINGER, input->keybit);
461
462 /* Distance, rubber and mouse */
463 __set_bit(BTN_TOOL_RUBBER, input->keybit);
464 __set_bit(BTN_TOOL_MOUSE, input->keybit);
465
466 switch (hdev->product) {
467 case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
468 input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
469 input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
470 input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
471 input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
472 break;
473 case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
474 input_set_abs_params(input, ABS_X, 0, 40640, 4, 0);
475 input_set_abs_params(input, ABS_Y, 0, 25400, 4, 0);
476 input_set_abs_params(input, ABS_PRESSURE, 0, 2047, 0, 0);
477 break;
478 }
479
480 return 0;
481}
482
483static int wacom_probe(struct hid_device *hdev,
484 const struct hid_device_id *id)
485{
486 struct wacom_data *wdata;
487 int ret;
488
489 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
490 if (wdata == NULL) {
491 hid_err(hdev, "can't alloc wacom descriptor\n");
492 return -ENOMEM;
493 }
494
495 hid_set_drvdata(hdev, wdata);
496
497 /* Parse the HID report now */
498 ret = hid_parse(hdev);
499 if (ret) {
500 hid_err(hdev, "parse failed\n");
501 goto err_free;
502 }
503
504 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
505 if (ret) {
506 hid_err(hdev, "hw start failed\n");
507 goto err_free;
508 }
509
510 ret = device_create_file(&hdev->dev, &dev_attr_speed);
511 if (ret)
512 hid_warn(hdev,
513 "can't create sysfs speed attribute err: %d\n", ret);
514
515 switch (hdev->product) {
516 case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
517 /* Set Wacom mode 2 with high reporting speed */
518 wacom_poke(hdev, 1);
519 break;
520 case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
521 wdata->features = 0;
522 wacom_set_features(hdev);
523 break;
524 }
525
526#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
527 wdata->battery.properties = wacom_battery_props;
528 wdata->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
529 wdata->battery.get_property = wacom_battery_get_property;
530 wdata->battery.name = "wacom_battery";
531 wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
532 wdata->battery.use_for_apm = 0;
533
534 power_supply_powers(&wdata->battery, &hdev->dev);
535
536 ret = power_supply_register(&hdev->dev, &wdata->battery);
537 if (ret) {
538 hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
539 ret);
540 goto err_battery;
541 }
542
543 wdata->ac.properties = wacom_ac_props;
544 wdata->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
545 wdata->ac.get_property = wacom_ac_get_property;
546 wdata->ac.name = "wacom_ac";
547 wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
548 wdata->ac.use_for_apm = 0;
549
550 power_supply_powers(&wdata->battery, &hdev->dev);
551
552 ret = power_supply_register(&hdev->dev, &wdata->ac);
553 if (ret) {
554 hid_warn(hdev,
555 "can't create ac battery attribute, err: %d\n", ret);
556 goto err_ac;
557 }
558#endif
559 return 0;
560
561#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
562err_ac:
563 power_supply_unregister(&wdata->battery);
564err_battery:
565 device_remove_file(&hdev->dev, &dev_attr_speed);
566 hid_hw_stop(hdev);
567#endif
568err_free:
569 kfree(wdata);
570 return ret;
571}
572
573static void wacom_remove(struct hid_device *hdev)
574{
575#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
576 struct wacom_data *wdata = hid_get_drvdata(hdev);
577#endif
578 device_remove_file(&hdev->dev, &dev_attr_speed);
579 hid_hw_stop(hdev);
580
581#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
582 power_supply_unregister(&wdata->battery);
583 power_supply_unregister(&wdata->ac);
584#endif
585 kfree(hid_get_drvdata(hdev));
586}
587
588static const struct hid_device_id wacom_devices[] = {
589 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
590 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
591
592 { }
593};
594MODULE_DEVICE_TABLE(hid, wacom_devices);
595
596static struct hid_driver wacom_driver = {
597 .name = "wacom",
598 .id_table = wacom_devices,
599 .probe = wacom_probe,
600 .remove = wacom_remove,
601 .raw_event = wacom_raw_event,
602 .input_mapped = wacom_input_mapped,
603};
604
605static int __init wacom_init(void)
606{
607 int ret;
608
609 ret = hid_register_driver(&wacom_driver);
610 if (ret)
611 pr_err("can't register wacom driver\n");
612 return ret;
613}
614
615static void __exit wacom_exit(void)
616{
617 hid_unregister_driver(&wacom_driver);
618}
619
620module_init(wacom_init);
621module_exit(wacom_exit);
622MODULE_LICENSE("GPL");
623