1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22
23#include <linux/device.h>
24#include <linux/hid.h>
25#include <linux/module.h>
26#include <linux/slab.h>
27#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
28#include <linux/power_supply.h>
29#endif
30
31#include "hid-ids.h"
32
33struct wacom_data {
34 __u16 tool;
35 unsigned char butstate;
36 unsigned char high_speed;
37#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
38 int battery_capacity;
39 struct power_supply battery;
40 struct power_supply ac;
41#endif
42};
43
44#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
45
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,
50 POWER_SUPPLY_PROP_CAPACITY
51};
52
53static enum power_supply_property wacom_ac_props[] = {
54 POWER_SUPPLY_PROP_PRESENT,
55 POWER_SUPPLY_PROP_ONLINE
56};
57
58static int wacom_battery_get_property(struct power_supply *psy,
59 enum power_supply_property psp,
60 union power_supply_propval *val)
61{
62 struct wacom_data *wdata = container_of(psy,
63 struct wacom_data, battery);
64 int power_state = batcap[wdata->battery_capacity];
65 int ret = 0;
66
67 switch (psp) {
68 case POWER_SUPPLY_PROP_PRESENT:
69 val->intval = 1;
70 break;
71 case POWER_SUPPLY_PROP_CAPACITY:
72
73 if (power_state == 0)
74 val->intval = 100;
75 else
76 val->intval = power_state;
77 break;
78 default:
79 ret = -EINVAL;
80 break;
81 }
82 return ret;
83}
84
85static int wacom_ac_get_property(struct power_supply *psy,
86 enum power_supply_property psp,
87 union power_supply_propval *val)
88{
89 struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
90 int power_state = batcap[wdata->battery_capacity];
91 int ret = 0;
92
93 switch (psp) {
94 case POWER_SUPPLY_PROP_PRESENT:
95
96 case POWER_SUPPLY_PROP_ONLINE:
97 if (power_state == 0)
98 val->intval = 1;
99 else
100 val->intval = 0;
101 break;
102 default:
103 ret = -EINVAL;
104 break;
105 }
106 return ret;
107}
108#endif
109
110static void wacom_poke(struct hid_device *hdev, u8 speed)
111{
112 struct wacom_data *wdata = hid_get_drvdata(hdev);
113 int limit, ret;
114 char rep_data[2];
115
116 rep_data[0] = 0x03 ; rep_data[1] = 0x00;
117 limit = 3;
118 do {
119 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
120 HID_FEATURE_REPORT);
121 } while (ret < 0 && limit-- > 0);
122
123 if (ret >= 0) {
124 if (speed == 0)
125 rep_data[0] = 0x05;
126 else
127 rep_data[0] = 0x06;
128
129 rep_data[1] = 0x00;
130 limit = 3;
131 do {
132 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
133 HID_FEATURE_REPORT);
134 } while (ret < 0 && limit-- > 0);
135
136 if (ret >= 0) {
137 wdata->high_speed = speed;
138 return;
139 }
140 }
141
142
143
144
145
146 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
147 rep_data[0], ret);
148 return;
149}
150
151static ssize_t wacom_show_speed(struct device *dev,
152 struct device_attribute
153 *attr, char *buf)
154{
155 struct wacom_data *wdata = dev_get_drvdata(dev);
156
157 return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
158}
159
160static ssize_t wacom_store_speed(struct device *dev,
161 struct device_attribute *attr,
162 const char *buf, size_t count)
163{
164 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
165 int new_speed;
166
167 if (sscanf(buf, "%1d", &new_speed ) != 1)
168 return -EINVAL;
169
170 if (new_speed == 0 || new_speed == 1) {
171 wacom_poke(hdev, new_speed);
172 return strnlen(buf, PAGE_SIZE);
173 } else
174 return -EINVAL;
175}
176
177static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
178 wacom_show_speed, wacom_store_speed);
179
180static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
181 u8 *raw_data, int size)
182{
183 struct wacom_data *wdata = hid_get_drvdata(hdev);
184 struct hid_input *hidinput;
185 struct input_dev *input;
186 unsigned char *data = (unsigned char *) raw_data;
187 int tool, x, y, rw;
188
189 if (!(hdev->claimed & HID_CLAIMED_INPUT))
190 return 0;
191
192 tool = 0;
193 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
194 input = hidinput->input;
195
196
197 if (data[0] != 0x03)
198 return 0;
199
200
201 x = le16_to_cpu(*(__le16 *) &data[2]);
202 y = le16_to_cpu(*(__le16 *) &data[4]);
203
204
205 if (data[1] & 0x90) {
206 switch ((data[1] >> 5) & 3) {
207 case 0:
208 tool = BTN_TOOL_PEN;
209 break;
210
211 case 1:
212 tool = BTN_TOOL_RUBBER;
213 break;
214
215 case 2:
216 case 3:
217 tool = BTN_TOOL_MOUSE;
218 break;
219 }
220
221
222 if (!(data[1] & 0x10))
223 tool = 0;
224 }
225
226
227 if (wdata->tool != tool) {
228 if (wdata->tool) {
229
230 if (wdata->tool == BTN_TOOL_MOUSE) {
231 input_report_key(input, BTN_LEFT, 0);
232 input_report_key(input, BTN_RIGHT, 0);
233 input_report_key(input, BTN_MIDDLE, 0);
234 input_report_abs(input, ABS_DISTANCE,
235 input_abs_get_max(input, ABS_DISTANCE));
236 } else {
237 input_report_key(input, BTN_TOUCH, 0);
238 input_report_key(input, BTN_STYLUS, 0);
239 input_report_key(input, BTN_STYLUS2, 0);
240 input_report_abs(input, ABS_PRESSURE, 0);
241 }
242 input_report_key(input, wdata->tool, 0);
243 input_sync(input);
244 }
245 wdata->tool = tool;
246 if (tool)
247 input_report_key(input, tool, 1);
248 }
249
250 if (tool) {
251 input_report_abs(input, ABS_X, x);
252 input_report_abs(input, ABS_Y, y);
253
254 switch ((data[1] >> 5) & 3) {
255 case 2:
256 input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
257 rw = (data[6] & 0x01) ? -1 :
258 (data[6] & 0x02) ? 1 : 0;
259 input_report_rel(input, REL_WHEEL, rw);
260
261
262 case 3:
263 input_report_key(input, BTN_LEFT, data[1] & 0x01);
264 input_report_key(input, BTN_RIGHT, data[1] & 0x02);
265
266 rw = 44 - (data[6] >> 2);
267 if (rw < 0)
268 rw = 0;
269 else if (rw > 31)
270 rw = 31;
271 input_report_abs(input, ABS_DISTANCE, rw);
272 break;
273
274 default:
275 input_report_abs(input, ABS_PRESSURE,
276 data[6] | (((__u16) (data[1] & 0x08)) << 5));
277 input_report_key(input, BTN_TOUCH, data[1] & 0x01);
278 input_report_key(input, BTN_STYLUS, data[1] & 0x02);
279 input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
280 break;
281 }
282
283 input_sync(input);
284 }
285
286
287
288 rw = data[7] & 0x03;
289 if (rw != wdata->butstate) {
290 wdata->butstate = rw;
291 input_report_key(input, BTN_0, rw & 0x02);
292 input_report_key(input, BTN_1, rw & 0x01);
293 input_report_key(input, BTN_TOOL_FINGER, 0xf0);
294 input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
295 input_sync(input);
296 }
297
298#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
299
300 rw = (data[7] >> 2 & 0x07);
301 if (rw != wdata->battery_capacity)
302 wdata->battery_capacity = rw;
303#endif
304 return 1;
305}
306
307static int wacom_probe(struct hid_device *hdev,
308 const struct hid_device_id *id)
309{
310 struct hid_input *hidinput;
311 struct input_dev *input;
312 struct wacom_data *wdata;
313 int ret;
314
315 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
316 if (wdata == NULL) {
317 hid_err(hdev, "can't alloc wacom descriptor\n");
318 return -ENOMEM;
319 }
320
321 hid_set_drvdata(hdev, wdata);
322
323
324 ret = hid_parse(hdev);
325 if (ret) {
326 hid_err(hdev, "parse failed\n");
327 goto err_free;
328 }
329
330 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
331 if (ret) {
332 hid_err(hdev, "hw start failed\n");
333 goto err_free;
334 }
335
336 ret = device_create_file(&hdev->dev, &dev_attr_speed);
337 if (ret)
338 hid_warn(hdev,
339 "can't create sysfs speed attribute err: %d\n", ret);
340
341
342 wacom_poke(hdev, 1);
343
344#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
345 wdata->battery.properties = wacom_battery_props;
346 wdata->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
347 wdata->battery.get_property = wacom_battery_get_property;
348 wdata->battery.name = "wacom_battery";
349 wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
350 wdata->battery.use_for_apm = 0;
351
352 ret = power_supply_register(&hdev->dev, &wdata->battery);
353 if (ret) {
354 hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
355 ret);
356
357
358
359
360 goto move_on;
361 }
362
363 wdata->ac.properties = wacom_ac_props;
364 wdata->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
365 wdata->ac.get_property = wacom_ac_get_property;
366 wdata->ac.name = "wacom_ac";
367 wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
368 wdata->ac.use_for_apm = 0;
369
370 ret = power_supply_register(&hdev->dev, &wdata->ac);
371 if (ret) {
372 hid_warn(hdev,
373 "can't create ac battery attribute, err: %d\n", ret);
374
375
376
377
378 power_supply_unregister(&wdata->battery);
379 }
380
381move_on:
382#endif
383 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
384 input = hidinput->input;
385
386
387 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
388
389 __set_bit(REL_WHEEL, input->relbit);
390
391 __set_bit(BTN_TOOL_PEN, input->keybit);
392 __set_bit(BTN_TOUCH, input->keybit);
393 __set_bit(BTN_STYLUS, input->keybit);
394 __set_bit(BTN_STYLUS2, input->keybit);
395 __set_bit(BTN_LEFT, input->keybit);
396 __set_bit(BTN_RIGHT, input->keybit);
397 __set_bit(BTN_MIDDLE, input->keybit);
398
399
400 input->evbit[0] |= BIT(EV_MSC);
401
402 __set_bit(MSC_SERIAL, input->mscbit);
403
404 __set_bit(BTN_0, input->keybit);
405 __set_bit(BTN_1, input->keybit);
406 __set_bit(BTN_TOOL_FINGER, input->keybit);
407
408
409 __set_bit(BTN_TOOL_RUBBER, input->keybit);
410 __set_bit(BTN_TOOL_MOUSE, input->keybit);
411
412 input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
413 input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
414 input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
415 input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
416
417 return 0;
418
419err_free:
420 kfree(wdata);
421 return ret;
422}
423
424static void wacom_remove(struct hid_device *hdev)
425{
426#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
427 struct wacom_data *wdata = hid_get_drvdata(hdev);
428#endif
429 hid_hw_stop(hdev);
430
431#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
432 power_supply_unregister(&wdata->battery);
433 power_supply_unregister(&wdata->ac);
434#endif
435 kfree(hid_get_drvdata(hdev));
436}
437
438static const struct hid_device_id wacom_devices[] = {
439 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
440
441 { }
442};
443MODULE_DEVICE_TABLE(hid, wacom_devices);
444
445static struct hid_driver wacom_driver = {
446 .name = "wacom",
447 .id_table = wacom_devices,
448 .probe = wacom_probe,
449 .remove = wacom_remove,
450 .raw_event = wacom_raw_event,
451};
452
453static int __init wacom_init(void)
454{
455 int ret;
456
457 ret = hid_register_driver(&wacom_driver);
458 if (ret)
459 pr_err("can't register wacom driver\n");
460 return ret;
461}
462
463static void __exit wacom_exit(void)
464{
465 hid_unregister_driver(&wacom_driver);
466}
467
468module_init(wacom_init);
469module_exit(wacom_exit);
470MODULE_LICENSE("GPL");
471
472
