2 * Bluetooth Wacom Tablet support
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>
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)
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
35 unsigned char butstate;
36 unsigned char high_speed;
37 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
39 struct power_supply battery;
40 struct power_supply ac;
44 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
45 /*percent of battery capacity, 0 means AC online*/
46 static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
48 static enum power_supply_property wacom_battery_props[] = {
49 POWER_SUPPLY_PROP_PRESENT,
50 POWER_SUPPLY_PROP_CAPACITY
53 static enum power_supply_property wacom_ac_props[] = {
54 POWER_SUPPLY_PROP_PRESENT,
55 POWER_SUPPLY_PROP_ONLINE
58 static int wacom_battery_get_property(struct power_supply *psy,
59 enum power_supply_property psp,
60 union power_supply_propval *val)
62 struct wacom_data *wdata = container_of(psy,
63 struct wacom_data, battery);
64 int power_state = batcap[wdata->battery_capacity];
68 case POWER_SUPPLY_PROP_PRESENT:
71 case POWER_SUPPLY_PROP_CAPACITY:
72 /* show 100% battery capacity when charging */
76 val->intval = power_state;
85 static int wacom_ac_get_property(struct power_supply *psy,
86 enum power_supply_property psp,
87 union power_supply_propval *val)
89 struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
90 int power_state = batcap[wdata->battery_capacity];
94 case POWER_SUPPLY_PROP_PRESENT:
96 case POWER_SUPPLY_PROP_ONLINE:
110 static void wacom_poke(struct hid_device *hdev, u8 speed)
112 struct wacom_data *wdata = hid_get_drvdata(hdev);
116 rep_data[0] = 0x03 ; rep_data[1] = 0x00;
119 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
121 } while (ret < 0 && limit-- > 0);
132 ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
134 } while (ret < 0 && limit-- > 0);
137 wdata->high_speed = speed;
143 * Note that if the raw queries fail, it's not a hard failure and it
144 * is safe to continue
146 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
151 static ssize_t wacom_show_speed(struct device *dev,
152 struct device_attribute
155 struct wacom_data *wdata = dev_get_drvdata(dev);
157 return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
160 static ssize_t wacom_store_speed(struct device *dev,
161 struct device_attribute *attr,
162 const char *buf, size_t count)
164 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
167 if (sscanf(buf, "%1d", &new_speed ) != 1)
170 if (new_speed == 0 || new_speed == 1) {
171 wacom_poke(hdev, new_speed);
172 return strnlen(buf, PAGE_SIZE);
177 static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
178 wacom_show_speed, wacom_store_speed);
180 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
181 u8 *raw_data, int size)
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;
189 if (!(hdev->claimed & HID_CLAIMED_INPUT))
193 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
194 input = hidinput->input;
196 /* Check if this is a tablet report */
200 /* Get X & Y positions */
201 x = le16_to_cpu(*(__le16 *) &data[2]);
202 y = le16_to_cpu(*(__le16 *) &data[4]);
204 /* Get current tool identifier */
205 if (data[1] & 0x90) { /* If pen is in the in/active area */
206 switch ((data[1] >> 5) & 3) {
212 tool = BTN_TOOL_RUBBER;
215 case 2: /* Mouse with wheel */
216 case 3: /* Mouse without wheel */
217 tool = BTN_TOOL_MOUSE;
221 /* Reset tool if out of active tablet area */
222 if (!(data[1] & 0x10))
226 /* If tool changed, notify input subsystem */
227 if (wdata->tool != tool) {
229 /* Completely reset old tool state */
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));
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);
242 input_report_key(input, wdata->tool, 0);
247 input_report_key(input, tool, 1);
251 input_report_abs(input, ABS_X, x);
252 input_report_abs(input, ABS_Y, y);
254 switch ((data[1] >> 5) & 3) {
255 case 2: /* Mouse with wheel */
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);
262 case 3: /* Mouse without wheel */
263 input_report_key(input, BTN_LEFT, data[1] & 0x01);
264 input_report_key(input, BTN_RIGHT, data[1] & 0x02);
265 /* Compute distance between mouse and tablet */
266 rw = 44 - (data[6] >> 2);
271 input_report_abs(input, ABS_DISTANCE, rw);
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);
286 /* Report the state of the two buttons at the top of the tablet
287 * as two extra fingerpad keys (buttons 4 & 5). */
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);
298 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
299 /* Store current battery capacity */
300 rw = (data[7] >> 2 & 0x07);
301 if (rw != wdata->battery_capacity)
302 wdata->battery_capacity = rw;
307 static int wacom_probe(struct hid_device *hdev,
308 const struct hid_device_id *id)
310 struct hid_input *hidinput;
311 struct input_dev *input;
312 struct wacom_data *wdata;
315 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
317 hid_err(hdev, "can't alloc wacom descriptor\n");
321 hid_set_drvdata(hdev, wdata);
323 /* Parse the HID report now */
324 ret = hid_parse(hdev);
326 hid_err(hdev, "parse failed\n");
330 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
332 hid_err(hdev, "hw start failed\n");
336 ret = device_create_file(&hdev->dev, &dev_attr_speed);
339 "can't create sysfs speed attribute err: %d\n", ret);
341 /* Set Wacom mode 2 with high reporting speed */
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;
352 ret = power_supply_register(&hdev->dev, &wdata->battery);
354 hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
357 * battery attribute is not critical for the tablet, but if it
358 * failed then there is no need to create ac attribute
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;
370 ret = power_supply_register(&hdev->dev, &wdata->ac);
373 "can't create ac battery attribute, err: %d\n", ret);
375 * ac attribute is not critical for the tablet, but if it
376 * failed then we don't want to battery attribute to exist
378 power_supply_unregister(&wdata->battery);
383 hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
384 input = hidinput->input;
387 input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
389 __set_bit(REL_WHEEL, input->relbit);
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);
400 input->evbit[0] |= BIT(EV_MSC);
402 __set_bit(MSC_SERIAL, input->mscbit);
404 __set_bit(BTN_0, input->keybit);
405 __set_bit(BTN_1, input->keybit);
406 __set_bit(BTN_TOOL_FINGER, input->keybit);
408 /* Distance, rubber and mouse */
409 __set_bit(BTN_TOOL_RUBBER, input->keybit);
410 __set_bit(BTN_TOOL_MOUSE, input->keybit);
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);
424 static void wacom_remove(struct hid_device *hdev)
426 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
427 struct wacom_data *wdata = hid_get_drvdata(hdev);
431 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
432 power_supply_unregister(&wdata->battery);
433 power_supply_unregister(&wdata->ac);
435 kfree(hid_get_drvdata(hdev));
438 static const struct hid_device_id wacom_devices[] = {
439 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
443 MODULE_DEVICE_TABLE(hid, wacom_devices);
445 static struct hid_driver wacom_driver = {
447 .id_table = wacom_devices,
448 .probe = wacom_probe,
449 .remove = wacom_remove,
450 .raw_event = wacom_raw_event,
453 static int __init wacom_init(void)
457 ret = hid_register_driver(&wacom_driver);
459 pr_err("can't register wacom driver\n");
463 static void __exit wacom_exit(void)
465 hid_unregister_driver(&wacom_driver);
468 module_init(wacom_init);
469 module_exit(wacom_exit);
470 MODULE_LICENSE("GPL");