media: tegra: enable a clock for VIP in APB MISC register
[linux-2.6.git] / drivers / hid / hid-wacom.c
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  */
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
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
33 struct 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 /*percent of battery capacity, 0 means AC online*/
46 static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
47
48 static enum power_supply_property wacom_battery_props[] = {
49         POWER_SUPPLY_PROP_PRESENT,
50         POWER_SUPPLY_PROP_CAPACITY
51 };
52
53 static enum power_supply_property wacom_ac_props[] = {
54         POWER_SUPPLY_PROP_PRESENT,
55         POWER_SUPPLY_PROP_ONLINE
56 };
57
58 static 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                 /* show 100% battery capacity when charging */
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
85 static 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                 /* fall through */
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
110 static 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          * Note that if the raw queries fail, it's not a hard failure and it
144          * is safe to continue
145          */
146         hid_warn(hdev, "failed to poke device, command %d, err %d\n",
147                  rep_data[0], ret);
148         return;
149 }
150
151 static 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
160 static 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
177 static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
178                 wacom_show_speed, wacom_store_speed);
179
180 static 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         /* Check if this is a tablet report */
197         if (data[0] != 0x03)
198                 return 0;
199
200         /* Get X & Y positions */
201         x = le16_to_cpu(*(__le16 *) &data[2]);
202         y = le16_to_cpu(*(__le16 *) &data[4]);
203
204         /* Get current tool identifier */
205         if (data[1] & 0x90) { /* If pen is in the in/active area */
206                 switch ((data[1] >> 5) & 3) {
207                 case 0: /* Pen */
208                         tool = BTN_TOOL_PEN;
209                         break;
210
211                 case 1: /* Rubber */
212                         tool = BTN_TOOL_RUBBER;
213                         break;
214
215                 case 2: /* Mouse with wheel */
216                 case 3: /* Mouse without wheel */
217                         tool = BTN_TOOL_MOUSE;
218                         break;
219                 }
220
221                 /* Reset tool if out of active tablet area */
222                 if (!(data[1] & 0x10))
223                         tool = 0;
224         }
225
226         /* If tool changed, notify input subsystem */
227         if (wdata->tool != tool) {
228                 if (wdata->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));
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: /* 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);
260                         /* fall through */
261
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);
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         /* Report the state of the two buttons at the top of the tablet
287          * as two extra fingerpad keys (buttons 4 & 5). */
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         /* Store current battery capacity */
300         rw = (data[7] >> 2 & 0x07);
301         if (rw != wdata->battery_capacity)
302                 wdata->battery_capacity = rw;
303 #endif
304         return 1;
305 }
306
307 static 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         /* Parse the HID report now */
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         /* Set Wacom mode 2 with high reporting speed */
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                 goto err_battery;
357         }
358
359         wdata->ac.properties = wacom_ac_props;
360         wdata->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
361         wdata->ac.get_property = wacom_ac_get_property;
362         wdata->ac.name = "wacom_ac";
363         wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
364         wdata->ac.use_for_apm = 0;
365
366         ret = power_supply_register(&hdev->dev, &wdata->ac);
367         if (ret) {
368                 hid_warn(hdev,
369                          "can't create ac battery attribute, err: %d\n", ret);
370                 goto err_ac;
371         }
372 #endif
373         hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
374         input = hidinput->input;
375
376         __set_bit(INPUT_PROP_POINTER, input->propbit);
377
378         /* Basics */
379         input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
380
381         __set_bit(REL_WHEEL, input->relbit);
382
383         __set_bit(BTN_TOOL_PEN, input->keybit);
384         __set_bit(BTN_TOUCH, input->keybit);
385         __set_bit(BTN_STYLUS, input->keybit);
386         __set_bit(BTN_STYLUS2, input->keybit);
387         __set_bit(BTN_LEFT, input->keybit);
388         __set_bit(BTN_RIGHT, input->keybit);
389         __set_bit(BTN_MIDDLE, input->keybit);
390
391         /* Pad */
392         input->evbit[0] |= BIT(EV_MSC);
393
394         __set_bit(MSC_SERIAL, input->mscbit);
395
396         __set_bit(BTN_0, input->keybit);
397         __set_bit(BTN_1, input->keybit);
398         __set_bit(BTN_TOOL_FINGER, input->keybit);
399
400         /* Distance, rubber and mouse */
401         __set_bit(BTN_TOOL_RUBBER, input->keybit);
402         __set_bit(BTN_TOOL_MOUSE, input->keybit);
403
404         input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
405         input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
406         input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
407         input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
408
409         return 0;
410
411 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
412 err_ac:
413         power_supply_unregister(&wdata->battery);
414 err_battery:
415         device_remove_file(&hdev->dev, &dev_attr_speed);
416         hid_hw_stop(hdev);
417 #endif
418 err_free:
419         kfree(wdata);
420         return ret;
421 }
422
423 static void wacom_remove(struct hid_device *hdev)
424 {
425 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
426         struct wacom_data *wdata = hid_get_drvdata(hdev);
427 #endif
428         device_remove_file(&hdev->dev, &dev_attr_speed);
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
438 static const struct hid_device_id wacom_devices[] = {
439         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
440
441         { }
442 };
443 MODULE_DEVICE_TABLE(hid, wacom_devices);
444
445 static 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
453 static 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
463 static void __exit wacom_exit(void)
464 {
465         hid_unregister_driver(&wacom_driver);
466 }
467
468 module_init(wacom_init);
469 module_exit(wacom_exit);
470 MODULE_LICENSE("GPL");
471