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Bastien Noceraca2dcd42009-05-11 17:18:12 +02001/*
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 */
13
14/*
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 2 of the License, or (at your option)
18 * any later version.
19 */
20
Joe Perches4291ee32010-12-09 19:29:03 -080021#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22
Bastien Noceraca2dcd42009-05-11 17:18:12 +020023#include <linux/device.h>
24#include <linux/hid.h>
25#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Przemo Firszt59d23342010-03-15 19:16:23 +000027#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
28#include <linux/power_supply.h>
29#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +020030
31#include "hid-ids.h"
32
33struct wacom_data {
34 __u16 tool;
35 unsigned char butstate;
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +000036 unsigned char high_speed;
Przemo Firszt59d23342010-03-15 19:16:23 +000037#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
38 int battery_capacity;
39 struct power_supply battery;
40 struct power_supply ac;
41#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +020042};
43
Przemo Firszt59d23342010-03-15 19:16:23 +000044#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
45/*percent of battery capacity, 0 means AC online*/
46static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
47
48static enum power_supply_property wacom_battery_props[] = {
49 POWER_SUPPLY_PROP_PRESENT,
Jeremy Fitzhardinge73db8812011-12-07 11:29:46 -080050 POWER_SUPPLY_PROP_CAPACITY,
51 POWER_SUPPLY_PROP_SCOPE,
Przemo Firszt59d23342010-03-15 19:16:23 +000052};
53
54static enum power_supply_property wacom_ac_props[] = {
55 POWER_SUPPLY_PROP_PRESENT,
Jeremy Fitzhardinge73db8812011-12-07 11:29:46 -080056 POWER_SUPPLY_PROP_ONLINE,
57 POWER_SUPPLY_PROP_SCOPE,
Przemo Firszt59d23342010-03-15 19:16:23 +000058};
59
60static int wacom_battery_get_property(struct power_supply *psy,
61 enum power_supply_property psp,
62 union power_supply_propval *val)
63{
64 struct wacom_data *wdata = container_of(psy,
65 struct wacom_data, battery);
66 int power_state = batcap[wdata->battery_capacity];
67 int ret = 0;
68
69 switch (psp) {
70 case POWER_SUPPLY_PROP_PRESENT:
71 val->intval = 1;
72 break;
Jeremy Fitzhardinge73db8812011-12-07 11:29:46 -080073 case POWER_SUPPLY_PROP_SCOPE:
74 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
75 break;
Przemo Firszt59d23342010-03-15 19:16:23 +000076 case POWER_SUPPLY_PROP_CAPACITY:
77 /* show 100% battery capacity when charging */
78 if (power_state == 0)
79 val->intval = 100;
80 else
81 val->intval = power_state;
82 break;
83 default:
84 ret = -EINVAL;
85 break;
86 }
87 return ret;
88}
89
90static int wacom_ac_get_property(struct power_supply *psy,
91 enum power_supply_property psp,
92 union power_supply_propval *val)
93{
94 struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
95 int power_state = batcap[wdata->battery_capacity];
96 int ret = 0;
97
98 switch (psp) {
99 case POWER_SUPPLY_PROP_PRESENT:
100 /* fall through */
101 case POWER_SUPPLY_PROP_ONLINE:
102 if (power_state == 0)
103 val->intval = 1;
104 else
105 val->intval = 0;
106 break;
Jeremy Fitzhardinge73db8812011-12-07 11:29:46 -0800107 case POWER_SUPPLY_PROP_SCOPE:
108 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
109 break;
Przemo Firszt59d23342010-03-15 19:16:23 +0000110 default:
111 ret = -EINVAL;
112 break;
113 }
114 return ret;
115}
116#endif
117
Przemo Firszt06c7c312010-03-22 09:55:04 +0100118static void wacom_poke(struct hid_device *hdev, u8 speed)
119{
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000120 struct wacom_data *wdata = hid_get_drvdata(hdev);
Przemo Firszt06c7c312010-03-22 09:55:04 +0100121 int limit, ret;
122 char rep_data[2];
123
124 rep_data[0] = 0x03 ; rep_data[1] = 0x00;
125 limit = 3;
126 do {
127 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
128 HID_FEATURE_REPORT);
129 } while (ret < 0 && limit-- > 0);
130
131 if (ret >= 0) {
132 if (speed == 0)
133 rep_data[0] = 0x05;
134 else
135 rep_data[0] = 0x06;
136
137 rep_data[1] = 0x00;
138 limit = 3;
139 do {
140 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
141 HID_FEATURE_REPORT);
142 } while (ret < 0 && limit-- > 0);
143
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000144 if (ret >= 0) {
145 wdata->high_speed = speed;
Przemo Firszt06c7c312010-03-22 09:55:04 +0100146 return;
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000147 }
Przemo Firszt06c7c312010-03-22 09:55:04 +0100148 }
149
150 /*
151 * Note that if the raw queries fail, it's not a hard failure and it
152 * is safe to continue
153 */
Joe Perches4291ee32010-12-09 19:29:03 -0800154 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
155 rep_data[0], ret);
Przemo Firszt06c7c312010-03-22 09:55:04 +0100156 return;
157}
158
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000159static ssize_t wacom_show_speed(struct device *dev,
160 struct device_attribute
161 *attr, char *buf)
162{
163 struct wacom_data *wdata = dev_get_drvdata(dev);
164
165 return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
166}
167
168static ssize_t wacom_store_speed(struct device *dev,
169 struct device_attribute *attr,
170 const char *buf, size_t count)
171{
172 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
173 int new_speed;
174
175 if (sscanf(buf, "%1d", &new_speed ) != 1)
176 return -EINVAL;
177
178 if (new_speed == 0 || new_speed == 1) {
179 wacom_poke(hdev, new_speed);
180 return strnlen(buf, PAGE_SIZE);
181 } else
182 return -EINVAL;
183}
184
Jiri Kosinaedd21262010-11-18 16:28:43 +0100185static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000186 wacom_show_speed, wacom_store_speed);
187
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200188static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
189 u8 *raw_data, int size)
190{
191 struct wacom_data *wdata = hid_get_drvdata(hdev);
192 struct hid_input *hidinput;
193 struct input_dev *input;
194 unsigned char *data = (unsigned char *) raw_data;
195 int tool, x, y, rw;
196
197 if (!(hdev->claimed & HID_CLAIMED_INPUT))
198 return 0;
199
200 tool = 0;
201 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
202 input = hidinput->input;
203
204 /* Check if this is a tablet report */
205 if (data[0] != 0x03)
206 return 0;
207
208 /* Get X & Y positions */
209 x = le16_to_cpu(*(__le16 *) &data[2]);
210 y = le16_to_cpu(*(__le16 *) &data[4]);
211
212 /* Get current tool identifier */
213 if (data[1] & 0x90) { /* If pen is in the in/active area */
214 switch ((data[1] >> 5) & 3) {
215 case 0: /* Pen */
216 tool = BTN_TOOL_PEN;
217 break;
218
219 case 1: /* Rubber */
220 tool = BTN_TOOL_RUBBER;
221 break;
222
223 case 2: /* Mouse with wheel */
224 case 3: /* Mouse without wheel */
225 tool = BTN_TOOL_MOUSE;
226 break;
227 }
228
229 /* Reset tool if out of active tablet area */
230 if (!(data[1] & 0x10))
231 tool = 0;
232 }
233
234 /* If tool changed, notify input subsystem */
235 if (wdata->tool != tool) {
236 if (wdata->tool) {
237 /* Completely reset old tool state */
238 if (wdata->tool == BTN_TOOL_MOUSE) {
239 input_report_key(input, BTN_LEFT, 0);
240 input_report_key(input, BTN_RIGHT, 0);
241 input_report_key(input, BTN_MIDDLE, 0);
242 input_report_abs(input, ABS_DISTANCE,
Daniel Mack987a6c02010-08-02 20:15:17 -0700243 input_abs_get_max(input, ABS_DISTANCE));
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200244 } else {
245 input_report_key(input, BTN_TOUCH, 0);
246 input_report_key(input, BTN_STYLUS, 0);
247 input_report_key(input, BTN_STYLUS2, 0);
248 input_report_abs(input, ABS_PRESSURE, 0);
249 }
250 input_report_key(input, wdata->tool, 0);
251 input_sync(input);
252 }
253 wdata->tool = tool;
254 if (tool)
255 input_report_key(input, tool, 1);
256 }
257
258 if (tool) {
259 input_report_abs(input, ABS_X, x);
260 input_report_abs(input, ABS_Y, y);
261
262 switch ((data[1] >> 5) & 3) {
263 case 2: /* Mouse with wheel */
264 input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
265 rw = (data[6] & 0x01) ? -1 :
266 (data[6] & 0x02) ? 1 : 0;
267 input_report_rel(input, REL_WHEEL, rw);
268 /* fall through */
269
270 case 3: /* Mouse without wheel */
271 input_report_key(input, BTN_LEFT, data[1] & 0x01);
272 input_report_key(input, BTN_RIGHT, data[1] & 0x02);
273 /* Compute distance between mouse and tablet */
274 rw = 44 - (data[6] >> 2);
275 if (rw < 0)
276 rw = 0;
277 else if (rw > 31)
278 rw = 31;
279 input_report_abs(input, ABS_DISTANCE, rw);
280 break;
281
282 default:
283 input_report_abs(input, ABS_PRESSURE,
284 data[6] | (((__u16) (data[1] & 0x08)) << 5));
285 input_report_key(input, BTN_TOUCH, data[1] & 0x01);
286 input_report_key(input, BTN_STYLUS, data[1] & 0x02);
287 input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
288 break;
289 }
290
291 input_sync(input);
292 }
293
294 /* Report the state of the two buttons at the top of the tablet
295 * as two extra fingerpad keys (buttons 4 & 5). */
296 rw = data[7] & 0x03;
297 if (rw != wdata->butstate) {
298 wdata->butstate = rw;
299 input_report_key(input, BTN_0, rw & 0x02);
300 input_report_key(input, BTN_1, rw & 0x01);
Przemo Firszt0e253fd2010-01-09 15:20:03 +0100301 input_report_key(input, BTN_TOOL_FINGER, 0xf0);
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200302 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
303 input_sync(input);
304 }
305
Przemo Firszt59d23342010-03-15 19:16:23 +0000306#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
307 /* Store current battery capacity */
308 rw = (data[7] >> 2 & 0x07);
309 if (rw != wdata->battery_capacity)
310 wdata->battery_capacity = rw;
311#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200312 return 1;
313}
314
David Herrmann3797ef62011-10-08 23:20:17 +0200315static int wacom_input_mapped(struct hid_device *hdev, struct hid_input *hi,
316 struct hid_field *field, struct hid_usage *usage, unsigned long **bit,
317 int *max)
318{
319 struct input_dev *input = hi->input;
320
Jiri Kosinaf6f12422011-10-25 09:58:12 +0200321 __set_bit(INPUT_PROP_POINTER, input->propbit);
322
David Herrmann3797ef62011-10-08 23:20:17 +0200323 /* Basics */
324 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
325
326 __set_bit(REL_WHEEL, input->relbit);
327
328 __set_bit(BTN_TOOL_PEN, input->keybit);
329 __set_bit(BTN_TOUCH, input->keybit);
330 __set_bit(BTN_STYLUS, input->keybit);
331 __set_bit(BTN_STYLUS2, input->keybit);
332 __set_bit(BTN_LEFT, input->keybit);
333 __set_bit(BTN_RIGHT, input->keybit);
334 __set_bit(BTN_MIDDLE, input->keybit);
335
336 /* Pad */
337 input->evbit[0] |= BIT(EV_MSC);
338
339 __set_bit(MSC_SERIAL, input->mscbit);
340
341 __set_bit(BTN_0, input->keybit);
342 __set_bit(BTN_1, input->keybit);
343 __set_bit(BTN_TOOL_FINGER, input->keybit);
344
345 /* Distance, rubber and mouse */
346 __set_bit(BTN_TOOL_RUBBER, input->keybit);
347 __set_bit(BTN_TOOL_MOUSE, input->keybit);
348
349 input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
350 input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
351 input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
352 input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
353
354 return 0;
355}
356
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200357static int wacom_probe(struct hid_device *hdev,
358 const struct hid_device_id *id)
359{
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200360 struct wacom_data *wdata;
361 int ret;
362
363 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
364 if (wdata == NULL) {
Joe Perches4291ee32010-12-09 19:29:03 -0800365 hid_err(hdev, "can't alloc wacom descriptor\n");
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200366 return -ENOMEM;
367 }
368
369 hid_set_drvdata(hdev, wdata);
370
Bastien Nocera46a709b2010-01-20 12:00:53 +0000371 /* Parse the HID report now */
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200372 ret = hid_parse(hdev);
373 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800374 hid_err(hdev, "parse failed\n");
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200375 goto err_free;
376 }
377
378 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
379 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800380 hid_err(hdev, "hw start failed\n");
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200381 goto err_free;
382 }
383
Przemo Firszt20a3ce7e2010-03-18 14:34:34 +0000384 ret = device_create_file(&hdev->dev, &dev_attr_speed);
385 if (ret)
Joe Perches4291ee32010-12-09 19:29:03 -0800386 hid_warn(hdev,
387 "can't create sysfs speed attribute err: %d\n", ret);
Jiri Kosina342f31e2010-02-03 15:52:31 +0100388
Przemo Firszt06c7c312010-03-22 09:55:04 +0100389 /* Set Wacom mode 2 with high reporting speed */
390 wacom_poke(hdev, 1);
Bastien Nocera46a709b2010-01-20 12:00:53 +0000391
Przemo Firszt59d23342010-03-15 19:16:23 +0000392#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
393 wdata->battery.properties = wacom_battery_props;
394 wdata->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
395 wdata->battery.get_property = wacom_battery_get_property;
396 wdata->battery.name = "wacom_battery";
397 wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
398 wdata->battery.use_for_apm = 0;
Bastien Nocera46a709b2010-01-20 12:00:53 +0000399
Przemo Firszt59d23342010-03-15 19:16:23 +0000400 ret = power_supply_register(&hdev->dev, &wdata->battery);
401 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800402 hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
403 ret);
David Herrmanndde58cf2011-09-05 18:45:28 +0200404 goto err_battery;
Przemo Firszt59d23342010-03-15 19:16:23 +0000405 }
406
407 wdata->ac.properties = wacom_ac_props;
408 wdata->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
409 wdata->ac.get_property = wacom_ac_get_property;
410 wdata->ac.name = "wacom_ac";
411 wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
412 wdata->ac.use_for_apm = 0;
413
414 ret = power_supply_register(&hdev->dev, &wdata->ac);
415 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800416 hid_warn(hdev,
417 "can't create ac battery attribute, err: %d\n", ret);
David Herrmanndde58cf2011-09-05 18:45:28 +0200418 goto err_ac;
Przemo Firszt59d23342010-03-15 19:16:23 +0000419 }
Przemo Firszt59d23342010-03-15 19:16:23 +0000420#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200421 return 0;
Daniel Mack987a6c02010-08-02 20:15:17 -0700422
David Herrmanndde58cf2011-09-05 18:45:28 +0200423#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
424err_ac:
425 power_supply_unregister(&wdata->battery);
426err_battery:
427 device_remove_file(&hdev->dev, &dev_attr_speed);
428 hid_hw_stop(hdev);
429#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200430err_free:
431 kfree(wdata);
432 return ret;
433}
434
435static void wacom_remove(struct hid_device *hdev)
436{
Przemo Firszt59d23342010-03-15 19:16:23 +0000437#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
438 struct wacom_data *wdata = hid_get_drvdata(hdev);
439#endif
David Herrmann90866172011-09-05 18:45:29 +0200440 device_remove_file(&hdev->dev, &dev_attr_speed);
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200441 hid_hw_stop(hdev);
Przemo Firszt59d23342010-03-15 19:16:23 +0000442
443#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
444 power_supply_unregister(&wdata->battery);
445 power_supply_unregister(&wdata->ac);
446#endif
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200447 kfree(hid_get_drvdata(hdev));
448}
449
450static const struct hid_device_id wacom_devices[] = {
451 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
Jiri Kosinad5e0a062010-07-20 17:48:48 +0200452
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200453 { }
454};
455MODULE_DEVICE_TABLE(hid, wacom_devices);
456
457static struct hid_driver wacom_driver = {
458 .name = "wacom",
459 .id_table = wacom_devices,
460 .probe = wacom_probe,
461 .remove = wacom_remove,
462 .raw_event = wacom_raw_event,
David Herrmann3797ef62011-10-08 23:20:17 +0200463 .input_mapped = wacom_input_mapped,
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200464};
465
Peter Huewea24f423b2009-07-02 19:08:38 +0200466static int __init wacom_init(void)
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200467{
468 int ret;
469
470 ret = hid_register_driver(&wacom_driver);
471 if (ret)
Joe Perches4291ee32010-12-09 19:29:03 -0800472 pr_err("can't register wacom driver\n");
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200473 return ret;
474}
475
Peter Huewea24f423b2009-07-02 19:08:38 +0200476static void __exit wacom_exit(void)
Bastien Noceraca2dcd42009-05-11 17:18:12 +0200477{
478 hid_unregister_driver(&wacom_driver);
479}
480
481module_init(wacom_init);
482module_exit(wacom_exit);
483MODULE_LICENSE("GPL");
484