Merge tag 'v5.1' into next
[sfrench/cifs-2.6.git] / drivers / hid / hid-input.c
1 /*
2  *  Copyright (c) 2000-2001 Vojtech Pavlik
3  *  Copyright (c) 2006-2010 Jiri Kosina
4  *
5  *  HID to Linux Input mapping
6  */
7
8 /*
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22  *
23  * Should you need to contact me, the author, you can do so either by
24  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
25  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
26  */
27
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/kernel.h>
31
32 #include <linux/hid.h>
33 #include <linux/hid-debug.h>
34
35 #include "hid-ids.h"
36
37 #define unk     KEY_UNKNOWN
38
39 static const unsigned char hid_keyboard[256] = {
40           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
41          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
42           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
43          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
44          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
45         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
46          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
47         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
48         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
49         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
50         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
51         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
52         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
53         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
54          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
55         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
56 };
57
58 static const struct {
59         __s32 x;
60         __s32 y;
61 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
62
63 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
64 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
65 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
66 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
67
68 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
69                 &max, EV_ABS, (c))
70 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
71                 &max, EV_KEY, (c))
72
73 static bool match_scancode(struct hid_usage *usage,
74                            unsigned int cur_idx, unsigned int scancode)
75 {
76         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
77 }
78
79 static bool match_keycode(struct hid_usage *usage,
80                           unsigned int cur_idx, unsigned int keycode)
81 {
82         /*
83          * We should exclude unmapped usages when doing lookup by keycode.
84          */
85         return (usage->type == EV_KEY && usage->code == keycode);
86 }
87
88 static bool match_index(struct hid_usage *usage,
89                         unsigned int cur_idx, unsigned int idx)
90 {
91         return cur_idx == idx;
92 }
93
94 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
95                                 unsigned int cur_idx, unsigned int val);
96
97 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
98                                            hid_usage_cmp_t match,
99                                            unsigned int value,
100                                            unsigned int *usage_idx)
101 {
102         unsigned int i, j, k, cur_idx = 0;
103         struct hid_report *report;
104         struct hid_usage *usage;
105
106         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
107                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
108                         for (i = 0; i < report->maxfield; i++) {
109                                 for (j = 0; j < report->field[i]->maxusage; j++) {
110                                         usage = report->field[i]->usage + j;
111                                         if (usage->type == EV_KEY || usage->type == 0) {
112                                                 if (match(usage, cur_idx, value)) {
113                                                         if (usage_idx)
114                                                                 *usage_idx = cur_idx;
115                                                         return usage;
116                                                 }
117                                                 cur_idx++;
118                                         }
119                                 }
120                         }
121                 }
122         }
123         return NULL;
124 }
125
126 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
127                                         const struct input_keymap_entry *ke,
128                                         unsigned int *index)
129 {
130         struct hid_usage *usage;
131         unsigned int scancode;
132
133         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
134                 usage = hidinput_find_key(hid, match_index, ke->index, index);
135         else if (input_scancode_to_scalar(ke, &scancode) == 0)
136                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
137         else
138                 usage = NULL;
139
140         return usage;
141 }
142
143 static int hidinput_getkeycode(struct input_dev *dev,
144                                struct input_keymap_entry *ke)
145 {
146         struct hid_device *hid = input_get_drvdata(dev);
147         struct hid_usage *usage;
148         unsigned int scancode, index;
149
150         usage = hidinput_locate_usage(hid, ke, &index);
151         if (usage) {
152                 ke->keycode = usage->type == EV_KEY ?
153                                 usage->code : KEY_RESERVED;
154                 ke->index = index;
155                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
156                 ke->len = sizeof(scancode);
157                 memcpy(ke->scancode, &scancode, sizeof(scancode));
158                 return 0;
159         }
160
161         return -EINVAL;
162 }
163
164 static int hidinput_setkeycode(struct input_dev *dev,
165                                const struct input_keymap_entry *ke,
166                                unsigned int *old_keycode)
167 {
168         struct hid_device *hid = input_get_drvdata(dev);
169         struct hid_usage *usage;
170
171         usage = hidinput_locate_usage(hid, ke, NULL);
172         if (usage) {
173                 *old_keycode = usage->type == EV_KEY ?
174                                 usage->code : KEY_RESERVED;
175                 usage->code = ke->keycode;
176
177                 clear_bit(*old_keycode, dev->keybit);
178                 set_bit(usage->code, dev->keybit);
179                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
180                         usage->code, usage->hid);
181
182                 /*
183                  * Set the keybit for the old keycode if the old keycode is used
184                  * by another key
185                  */
186                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
187                         set_bit(*old_keycode, dev->keybit);
188
189                 return 0;
190         }
191
192         return -EINVAL;
193 }
194
195
196 /**
197  * hidinput_calc_abs_res - calculate an absolute axis resolution
198  * @field: the HID report field to calculate resolution for
199  * @code: axis code
200  *
201  * The formula is:
202  *                         (logical_maximum - logical_minimum)
203  * resolution = ----------------------------------------------------------
204  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
205  *
206  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
207  *
208  * Only exponent 1 length units are processed. Centimeters and inches are
209  * converted to millimeters. Degrees are converted to radians.
210  */
211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
212 {
213         __s32 unit_exponent = field->unit_exponent;
214         __s32 logical_extents = field->logical_maximum -
215                                         field->logical_minimum;
216         __s32 physical_extents = field->physical_maximum -
217                                         field->physical_minimum;
218         __s32 prev;
219
220         /* Check if the extents are sane */
221         if (logical_extents <= 0 || physical_extents <= 0)
222                 return 0;
223
224         /*
225          * Verify and convert units.
226          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
227          */
228         switch (code) {
229         case ABS_X:
230         case ABS_Y:
231         case ABS_Z:
232         case ABS_MT_POSITION_X:
233         case ABS_MT_POSITION_Y:
234         case ABS_MT_TOOL_X:
235         case ABS_MT_TOOL_Y:
236         case ABS_MT_TOUCH_MAJOR:
237         case ABS_MT_TOUCH_MINOR:
238                 if (field->unit == 0x11) {              /* If centimeters */
239                         /* Convert to millimeters */
240                         unit_exponent += 1;
241                 } else if (field->unit == 0x13) {       /* If inches */
242                         /* Convert to millimeters */
243                         prev = physical_extents;
244                         physical_extents *= 254;
245                         if (physical_extents < prev)
246                                 return 0;
247                         unit_exponent -= 1;
248                 } else {
249                         return 0;
250                 }
251                 break;
252
253         case ABS_RX:
254         case ABS_RY:
255         case ABS_RZ:
256         case ABS_WHEEL:
257         case ABS_TILT_X:
258         case ABS_TILT_Y:
259                 if (field->unit == 0x14) {              /* If degrees */
260                         /* Convert to radians */
261                         prev = logical_extents;
262                         logical_extents *= 573;
263                         if (logical_extents < prev)
264                                 return 0;
265                         unit_exponent += 1;
266                 } else if (field->unit != 0x12) {       /* If not radians */
267                         return 0;
268                 }
269                 break;
270
271         default:
272                 return 0;
273         }
274
275         /* Apply negative unit exponent */
276         for (; unit_exponent < 0; unit_exponent++) {
277                 prev = logical_extents;
278                 logical_extents *= 10;
279                 if (logical_extents < prev)
280                         return 0;
281         }
282         /* Apply positive unit exponent */
283         for (; unit_exponent > 0; unit_exponent--) {
284                 prev = physical_extents;
285                 physical_extents *= 10;
286                 if (physical_extents < prev)
287                         return 0;
288         }
289
290         /* Calculate resolution */
291         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
292 }
293 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
294
295 #ifdef CONFIG_HID_BATTERY_STRENGTH
296 static enum power_supply_property hidinput_battery_props[] = {
297         POWER_SUPPLY_PROP_PRESENT,
298         POWER_SUPPLY_PROP_ONLINE,
299         POWER_SUPPLY_PROP_CAPACITY,
300         POWER_SUPPLY_PROP_MODEL_NAME,
301         POWER_SUPPLY_PROP_STATUS,
302         POWER_SUPPLY_PROP_SCOPE,
303 };
304
305 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
306 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
307 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
308
309 static const struct hid_device_id hid_battery_quirks[] = {
310         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
311                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
312           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
313         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
314                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
315           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
316         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
317                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
318           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
319         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
320                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
321           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
322         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
323                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
324           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
325         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
326                 USB_DEVICE_ID_ELECOM_BM084),
327           HID_BATTERY_QUIRK_IGNORE },
328         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
329                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
330           HID_BATTERY_QUIRK_IGNORE },
331         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
332                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
333           HID_BATTERY_QUIRK_IGNORE },
334         {}
335 };
336
337 static unsigned find_battery_quirk(struct hid_device *hdev)
338 {
339         unsigned quirks = 0;
340         const struct hid_device_id *match;
341
342         match = hid_match_id(hdev, hid_battery_quirks);
343         if (match != NULL)
344                 quirks = match->driver_data;
345
346         return quirks;
347 }
348
349 static int hidinput_scale_battery_capacity(struct hid_device *dev,
350                                            int value)
351 {
352         if (dev->battery_min < dev->battery_max &&
353             value >= dev->battery_min && value <= dev->battery_max)
354                 value = ((value - dev->battery_min) * 100) /
355                         (dev->battery_max - dev->battery_min);
356
357         return value;
358 }
359
360 static int hidinput_query_battery_capacity(struct hid_device *dev)
361 {
362         u8 *buf;
363         int ret;
364
365         buf = kmalloc(2, GFP_KERNEL);
366         if (!buf)
367                 return -ENOMEM;
368
369         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
370                                  dev->battery_report_type, HID_REQ_GET_REPORT);
371         if (ret != 2) {
372                 kfree(buf);
373                 return -ENODATA;
374         }
375
376         ret = hidinput_scale_battery_capacity(dev, buf[1]);
377         kfree(buf);
378         return ret;
379 }
380
381 static int hidinput_get_battery_property(struct power_supply *psy,
382                                          enum power_supply_property prop,
383                                          union power_supply_propval *val)
384 {
385         struct hid_device *dev = power_supply_get_drvdata(psy);
386         int value;
387         int ret = 0;
388
389         switch (prop) {
390         case POWER_SUPPLY_PROP_PRESENT:
391         case POWER_SUPPLY_PROP_ONLINE:
392                 val->intval = 1;
393                 break;
394
395         case POWER_SUPPLY_PROP_CAPACITY:
396                 if (dev->battery_status != HID_BATTERY_REPORTED &&
397                     !dev->battery_avoid_query) {
398                         value = hidinput_query_battery_capacity(dev);
399                         if (value < 0)
400                                 return value;
401                 } else  {
402                         value = dev->battery_capacity;
403                 }
404
405                 val->intval = value;
406                 break;
407
408         case POWER_SUPPLY_PROP_MODEL_NAME:
409                 val->strval = dev->name;
410                 break;
411
412         case POWER_SUPPLY_PROP_STATUS:
413                 if (dev->battery_status != HID_BATTERY_REPORTED &&
414                     !dev->battery_avoid_query) {
415                         value = hidinput_query_battery_capacity(dev);
416                         if (value < 0)
417                                 return value;
418
419                         dev->battery_capacity = value;
420                         dev->battery_status = HID_BATTERY_QUERIED;
421                 }
422
423                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
424                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
425                 else if (dev->battery_capacity == 100)
426                         val->intval = POWER_SUPPLY_STATUS_FULL;
427                 else
428                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
429                 break;
430
431         case POWER_SUPPLY_PROP_SCOPE:
432                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
433                 break;
434
435         default:
436                 ret = -EINVAL;
437                 break;
438         }
439
440         return ret;
441 }
442
443 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
444 {
445         struct power_supply_desc *psy_desc;
446         struct power_supply_config psy_cfg = { .drv_data = dev, };
447         unsigned quirks;
448         s32 min, max;
449         int error;
450
451         if (dev->battery)
452                 return 0;       /* already initialized? */
453
454         quirks = find_battery_quirk(dev);
455
456         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
457                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
458
459         if (quirks & HID_BATTERY_QUIRK_IGNORE)
460                 return 0;
461
462         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
463         if (!psy_desc)
464                 return -ENOMEM;
465
466         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
467                                    strlen(dev->uniq) ?
468                                         dev->uniq : dev_name(&dev->dev));
469         if (!psy_desc->name) {
470                 error = -ENOMEM;
471                 goto err_free_mem;
472         }
473
474         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
475         psy_desc->properties = hidinput_battery_props;
476         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
477         psy_desc->use_for_apm = 0;
478         psy_desc->get_property = hidinput_get_battery_property;
479
480         min = field->logical_minimum;
481         max = field->logical_maximum;
482
483         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
484                 min = 0;
485                 max = 100;
486         }
487
488         if (quirks & HID_BATTERY_QUIRK_FEATURE)
489                 report_type = HID_FEATURE_REPORT;
490
491         dev->battery_min = min;
492         dev->battery_max = max;
493         dev->battery_report_type = report_type;
494         dev->battery_report_id = field->report->id;
495
496         /*
497          * Stylus is normally not connected to the device and thus we
498          * can't query the device and get meaningful battery strength.
499          * We have to wait for the device to report it on its own.
500          */
501         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
502                                    field->physical == HID_DG_STYLUS;
503
504         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
505         if (IS_ERR(dev->battery)) {
506                 error = PTR_ERR(dev->battery);
507                 hid_warn(dev, "can't register power supply: %d\n", error);
508                 goto err_free_name;
509         }
510
511         power_supply_powers(dev->battery, &dev->dev);
512         return 0;
513
514 err_free_name:
515         kfree(psy_desc->name);
516 err_free_mem:
517         kfree(psy_desc);
518         dev->battery = NULL;
519         return error;
520 }
521
522 static void hidinput_cleanup_battery(struct hid_device *dev)
523 {
524         const struct power_supply_desc *psy_desc;
525
526         if (!dev->battery)
527                 return;
528
529         psy_desc = dev->battery->desc;
530         power_supply_unregister(dev->battery);
531         kfree(psy_desc->name);
532         kfree(psy_desc);
533         dev->battery = NULL;
534 }
535
536 static void hidinput_update_battery(struct hid_device *dev, int value)
537 {
538         int capacity;
539
540         if (!dev->battery)
541                 return;
542
543         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
544                 return;
545
546         capacity = hidinput_scale_battery_capacity(dev, value);
547
548         if (dev->battery_status != HID_BATTERY_REPORTED ||
549             capacity != dev->battery_capacity) {
550                 dev->battery_capacity = capacity;
551                 dev->battery_status = HID_BATTERY_REPORTED;
552                 power_supply_changed(dev->battery);
553         }
554 }
555 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
556 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
557                                   struct hid_field *field)
558 {
559         return 0;
560 }
561
562 static void hidinput_cleanup_battery(struct hid_device *dev)
563 {
564 }
565
566 static void hidinput_update_battery(struct hid_device *dev, int value)
567 {
568 }
569 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
570
571 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
572                                      struct hid_usage *usage)
573 {
574         struct input_dev *input = hidinput->input;
575         struct hid_device *device = input_get_drvdata(input);
576         int max = 0, code;
577         unsigned long *bit = NULL;
578
579         field->hidinput = hidinput;
580
581         if (field->flags & HID_MAIN_ITEM_CONSTANT)
582                 goto ignore;
583
584         /* Ignore if report count is out of bounds. */
585         if (field->report_count < 1)
586                 goto ignore;
587
588         /* only LED usages are supported in output fields */
589         if (field->report_type == HID_OUTPUT_REPORT &&
590                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
591                 goto ignore;
592         }
593
594         if (device->driver->input_mapping) {
595                 int ret = device->driver->input_mapping(device, hidinput, field,
596                                 usage, &bit, &max);
597                 if (ret > 0)
598                         goto mapped;
599                 if (ret < 0)
600                         goto ignore;
601         }
602
603         switch (usage->hid & HID_USAGE_PAGE) {
604         case HID_UP_UNDEFINED:
605                 goto ignore;
606
607         case HID_UP_KEYBOARD:
608                 set_bit(EV_REP, input->evbit);
609
610                 if ((usage->hid & HID_USAGE) < 256) {
611                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
612                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
613                 } else
614                         map_key(KEY_UNKNOWN);
615
616                 break;
617
618         case HID_UP_BUTTON:
619                 code = ((usage->hid - 1) & HID_USAGE);
620
621                 switch (field->application) {
622                 case HID_GD_MOUSE:
623                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
624                 case HID_GD_JOYSTICK:
625                                 if (code <= 0xf)
626                                         code += BTN_JOYSTICK;
627                                 else
628                                         code += BTN_TRIGGER_HAPPY - 0x10;
629                                 break;
630                 case HID_GD_GAMEPAD:
631                                 if (code <= 0xf)
632                                         code += BTN_GAMEPAD;
633                                 else
634                                         code += BTN_TRIGGER_HAPPY - 0x10;
635                                 break;
636                 default:
637                         switch (field->physical) {
638                         case HID_GD_MOUSE:
639                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
640                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
641                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
642                         default:              code += BTN_MISC;
643                         }
644                 }
645
646                 map_key(code);
647                 break;
648
649         case HID_UP_SIMULATION:
650                 switch (usage->hid & 0xffff) {
651                 case 0xba: map_abs(ABS_RUDDER);   break;
652                 case 0xbb: map_abs(ABS_THROTTLE); break;
653                 case 0xc4: map_abs(ABS_GAS);      break;
654                 case 0xc5: map_abs(ABS_BRAKE);    break;
655                 case 0xc8: map_abs(ABS_WHEEL);    break;
656                 default:   goto ignore;
657                 }
658                 break;
659
660         case HID_UP_GENDESK:
661                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
662                         switch (usage->hid & 0xf) {
663                         case 0x1: map_key_clear(KEY_POWER);  break;
664                         case 0x2: map_key_clear(KEY_SLEEP);  break;
665                         case 0x3: map_key_clear(KEY_WAKEUP); break;
666                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
667                         case 0x5: map_key_clear(KEY_MENU); break;
668                         case 0x6: map_key_clear(KEY_PROG1); break;
669                         case 0x7: map_key_clear(KEY_HELP); break;
670                         case 0x8: map_key_clear(KEY_EXIT); break;
671                         case 0x9: map_key_clear(KEY_SELECT); break;
672                         case 0xa: map_key_clear(KEY_RIGHT); break;
673                         case 0xb: map_key_clear(KEY_LEFT); break;
674                         case 0xc: map_key_clear(KEY_UP); break;
675                         case 0xd: map_key_clear(KEY_DOWN); break;
676                         case 0xe: map_key_clear(KEY_POWER2); break;
677                         case 0xf: map_key_clear(KEY_RESTART); break;
678                         default: goto unknown;
679                         }
680                         break;
681                 }
682
683                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
684                         switch (usage->hid & 0xf) {
685                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
686                         default: goto ignore;
687                         }
688                         break;
689                 }
690
691                 /*
692                  * Some lazy vendors declare 255 usages for System Control,
693                  * leading to the creation of ABS_X|Y axis and too many others.
694                  * It wouldn't be a problem if joydev doesn't consider the
695                  * device as a joystick then.
696                  */
697                 if (field->application == HID_GD_SYSTEM_CONTROL)
698                         goto ignore;
699
700                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
701                         switch (usage->hid) {
702                         case HID_GD_UP:    usage->hat_dir = 1; break;
703                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
704                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
705                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
706                         default: goto unknown;
707                         }
708                         if (field->dpad) {
709                                 map_abs(field->dpad);
710                                 goto ignore;
711                         }
712                         map_abs(ABS_HAT0X);
713                         break;
714                 }
715
716                 switch (usage->hid) {
717                 /* These usage IDs map directly to the usage codes. */
718                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
719                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
720                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
721                                 map_rel(usage->hid & 0xf);
722                         else
723                                 map_abs_clear(usage->hid & 0xf);
724                         break;
725
726                 case HID_GD_WHEEL:
727                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
728                                 set_bit(REL_WHEEL, input->relbit);
729                                 map_rel(REL_WHEEL_HI_RES);
730                         } else {
731                                 map_abs(usage->hid & 0xf);
732                         }
733                         break;
734                 case HID_GD_SLIDER: case HID_GD_DIAL:
735                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
736                                 map_rel(usage->hid & 0xf);
737                         else
738                                 map_abs(usage->hid & 0xf);
739                         break;
740
741                 case HID_GD_HATSWITCH:
742                         usage->hat_min = field->logical_minimum;
743                         usage->hat_max = field->logical_maximum;
744                         map_abs(ABS_HAT0X);
745                         break;
746
747                 case HID_GD_START:      map_key_clear(BTN_START);       break;
748                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
749
750                 case HID_GD_RFKILL_BTN:
751                         /* MS wireless radio ctl extension, also check CA */
752                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
753                                 map_key_clear(KEY_RFKILL);
754                                 /* We need to simulate the btn release */
755                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
756                                 break;
757                         }
758
759                 default: goto unknown;
760                 }
761
762                 break;
763
764         case HID_UP_LED:
765                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
766                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
767                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
768                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
769                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
770                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
771                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
772                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
773                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
774                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
775                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
776                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
777
778                 default: goto ignore;
779                 }
780                 break;
781
782         case HID_UP_DIGITIZER:
783                 if ((field->application & 0xff) == 0x01) /* Digitizer */
784                         __set_bit(INPUT_PROP_POINTER, input->propbit);
785                 else if ((field->application & 0xff) == 0x02) /* Pen */
786                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
787
788                 switch (usage->hid & 0xff) {
789                 case 0x00: /* Undefined */
790                         goto ignore;
791
792                 case 0x30: /* TipPressure */
793                         if (!test_bit(BTN_TOUCH, input->keybit)) {
794                                 device->quirks |= HID_QUIRK_NOTOUCH;
795                                 set_bit(EV_KEY, input->evbit);
796                                 set_bit(BTN_TOUCH, input->keybit);
797                         }
798                         map_abs_clear(ABS_PRESSURE);
799                         break;
800
801                 case 0x32: /* InRange */
802                         switch (field->physical & 0xff) {
803                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
804                         case 0x22: map_key(BTN_TOOL_FINGER); break;
805                         default: map_key(BTN_TOOL_PEN); break;
806                         }
807                         break;
808
809                 case 0x3b: /* Battery Strength */
810                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
811                         usage->type = EV_PWR;
812                         goto ignore;
813
814                 case 0x3c: /* Invert */
815                         map_key_clear(BTN_TOOL_RUBBER);
816                         break;
817
818                 case 0x3d: /* X Tilt */
819                         map_abs_clear(ABS_TILT_X);
820                         break;
821
822                 case 0x3e: /* Y Tilt */
823                         map_abs_clear(ABS_TILT_Y);
824                         break;
825
826                 case 0x33: /* Touch */
827                 case 0x42: /* TipSwitch */
828                 case 0x43: /* TipSwitch2 */
829                         device->quirks &= ~HID_QUIRK_NOTOUCH;
830                         map_key_clear(BTN_TOUCH);
831                         break;
832
833                 case 0x44: /* BarrelSwitch */
834                         map_key_clear(BTN_STYLUS);
835                         break;
836
837                 case 0x45: /* ERASER */
838                         /*
839                          * This event is reported when eraser tip touches the surface.
840                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
841                          * tool gets in proximity.
842                          */
843                         map_key_clear(BTN_TOUCH);
844                         break;
845
846                 case 0x46: /* TabletPick */
847                 case 0x5a: /* SecondaryBarrelSwitch */
848                         map_key_clear(BTN_STYLUS2);
849                         break;
850
851                 case 0x5b: /* TransducerSerialNumber */
852                         usage->type = EV_MSC;
853                         usage->code = MSC_SERIAL;
854                         bit = input->mscbit;
855                         max = MSC_MAX;
856                         break;
857
858                 default:  goto unknown;
859                 }
860                 break;
861
862         case HID_UP_TELEPHONY:
863                 switch (usage->hid & HID_USAGE) {
864                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
865                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
866                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
867                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
868                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
869                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
870                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
871                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
872                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
873                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
874                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
875                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
876                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
877                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
878                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
879                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
880                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
881                 default: goto ignore;
882                 }
883                 break;
884
885         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
886                 switch (usage->hid & HID_USAGE) {
887                 case 0x000: goto ignore;
888                 case 0x030: map_key_clear(KEY_POWER);           break;
889                 case 0x031: map_key_clear(KEY_RESTART);         break;
890                 case 0x032: map_key_clear(KEY_SLEEP);           break;
891                 case 0x034: map_key_clear(KEY_SLEEP);           break;
892                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
893                 case 0x036: map_key_clear(BTN_MISC);            break;
894
895                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
896                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
897                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
898                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
899                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
900                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
901                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
902                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
903                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
904
905                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
906                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
907                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
908                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
909                 case 0x069: map_key_clear(KEY_RED);             break;
910                 case 0x06a: map_key_clear(KEY_GREEN);           break;
911                 case 0x06b: map_key_clear(KEY_BLUE);            break;
912                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
913                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
914
915                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
916                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
917                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
918                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
919                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
920                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
921
922                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
923                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
924                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
925
926                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
927                 case 0x083: map_key_clear(KEY_LAST);            break;
928                 case 0x084: map_key_clear(KEY_ENTER);           break;
929                 case 0x088: map_key_clear(KEY_PC);              break;
930                 case 0x089: map_key_clear(KEY_TV);              break;
931                 case 0x08a: map_key_clear(KEY_WWW);             break;
932                 case 0x08b: map_key_clear(KEY_DVD);             break;
933                 case 0x08c: map_key_clear(KEY_PHONE);           break;
934                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
935                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
936                 case 0x08f: map_key_clear(KEY_GAMES);           break;
937                 case 0x090: map_key_clear(KEY_MEMO);            break;
938                 case 0x091: map_key_clear(KEY_CD);              break;
939                 case 0x092: map_key_clear(KEY_VCR);             break;
940                 case 0x093: map_key_clear(KEY_TUNER);           break;
941                 case 0x094: map_key_clear(KEY_EXIT);            break;
942                 case 0x095: map_key_clear(KEY_HELP);            break;
943                 case 0x096: map_key_clear(KEY_TAPE);            break;
944                 case 0x097: map_key_clear(KEY_TV2);             break;
945                 case 0x098: map_key_clear(KEY_SAT);             break;
946                 case 0x09a: map_key_clear(KEY_PVR);             break;
947
948                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
949                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
950                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
951
952                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
953                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
954                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
955                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
956                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
957                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
958                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
959                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
960                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
961                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
962                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
963                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
964
965                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
966                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
967                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
968                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
969                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
970                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
971                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
972                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
973
974                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
975                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
976                 case 0x183: map_key_clear(KEY_CONFIG);          break;
977                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
978                 case 0x185: map_key_clear(KEY_EDITOR);          break;
979                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
980                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
981                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
982                 case 0x189: map_key_clear(KEY_DATABASE);        break;
983                 case 0x18a: map_key_clear(KEY_MAIL);            break;
984                 case 0x18b: map_key_clear(KEY_NEWS);            break;
985                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
986                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
987                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
988                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
989                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
990                 case 0x191: map_key_clear(KEY_FINANCE);         break;
991                 case 0x192: map_key_clear(KEY_CALC);            break;
992                 case 0x193: map_key_clear(KEY_PLAYER);          break;
993                 case 0x194: map_key_clear(KEY_FILE);            break;
994                 case 0x196: map_key_clear(KEY_WWW);             break;
995                 case 0x199: map_key_clear(KEY_CHAT);            break;
996                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
997                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
998                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
999                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1000                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1001                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1002                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1003                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1004                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1005                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1006                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1007                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1008                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1009                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1010                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1011                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1012                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1013                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1014                 case 0x201: map_key_clear(KEY_NEW);             break;
1015                 case 0x202: map_key_clear(KEY_OPEN);            break;
1016                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1017                 case 0x204: map_key_clear(KEY_EXIT);            break;
1018                 case 0x207: map_key_clear(KEY_SAVE);            break;
1019                 case 0x208: map_key_clear(KEY_PRINT);           break;
1020                 case 0x209: map_key_clear(KEY_PROPS);           break;
1021                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1022                 case 0x21b: map_key_clear(KEY_COPY);            break;
1023                 case 0x21c: map_key_clear(KEY_CUT);             break;
1024                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1025                 case 0x21f: map_key_clear(KEY_FIND);            break;
1026                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1027                 case 0x222: map_key_clear(KEY_GOTO);            break;
1028                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1029                 case 0x224: map_key_clear(KEY_BACK);            break;
1030                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1031                 case 0x226: map_key_clear(KEY_STOP);            break;
1032                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1033                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1034                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1035                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1036                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1037                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1038                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1039                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1040                 case 0x238: /* AC Pan */
1041                         set_bit(REL_HWHEEL, input->relbit);
1042                         map_rel(REL_HWHEEL_HI_RES);
1043                         break;
1044                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1045                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1046                 case 0x269: map_key_clear(KEY_INSERT);          break;
1047                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1048                 case 0x279: map_key_clear(KEY_REDO);            break;
1049
1050                 case 0x289: map_key_clear(KEY_REPLY);           break;
1051                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1052                 case 0x28c: map_key_clear(KEY_SEND);            break;
1053
1054                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1055
1056                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1057                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1058                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1059                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1060                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1061                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1062
1063                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1064
1065                 default: map_key_clear(KEY_UNKNOWN);
1066                 }
1067                 break;
1068
1069         case HID_UP_GENDEVCTRLS:
1070                 switch (usage->hid) {
1071                 case HID_DC_BATTERYSTRENGTH:
1072                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1073                         usage->type = EV_PWR;
1074                         goto ignore;
1075                 }
1076                 goto unknown;
1077
1078         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1079                 set_bit(EV_REP, input->evbit);
1080                 switch (usage->hid & HID_USAGE) {
1081                 case 0x021: map_key_clear(KEY_PRINT);           break;
1082                 case 0x070: map_key_clear(KEY_HP);              break;
1083                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1084                 case 0x072: map_key_clear(KEY_SOUND);           break;
1085                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1086                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1087                 case 0x081: map_key_clear(KEY_CHAT);            break;
1088                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1089                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1090                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1091                 case 0x085: map_key_clear(KEY_SPORT);           break;
1092                 case 0x086: map_key_clear(KEY_SHOP);            break;
1093                 default:    goto ignore;
1094                 }
1095                 break;
1096
1097         case HID_UP_HPVENDOR2:
1098                 set_bit(EV_REP, input->evbit);
1099                 switch (usage->hid & HID_USAGE) {
1100                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1101                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1102                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1103                 default:    goto ignore;
1104                 }
1105                 break;
1106
1107         case HID_UP_MSVENDOR:
1108                 goto ignore;
1109
1110         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1111                 set_bit(EV_REP, input->evbit);
1112                 goto ignore;
1113
1114         case HID_UP_LOGIVENDOR:
1115                 /* intentional fallback */
1116         case HID_UP_LOGIVENDOR2:
1117                 /* intentional fallback */
1118         case HID_UP_LOGIVENDOR3:
1119                 goto ignore;
1120
1121         case HID_UP_PID:
1122                 switch (usage->hid & HID_USAGE) {
1123                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1124                 default: goto ignore;
1125                 }
1126                 break;
1127
1128         default:
1129         unknown:
1130                 if (field->report_size == 1) {
1131                         if (field->report->type == HID_OUTPUT_REPORT) {
1132                                 map_led(LED_MISC);
1133                                 break;
1134                         }
1135                         map_key(BTN_MISC);
1136                         break;
1137                 }
1138                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1139                         map_rel(REL_MISC);
1140                         break;
1141                 }
1142                 map_abs(ABS_MISC);
1143                 break;
1144         }
1145
1146 mapped:
1147         if (device->driver->input_mapped && device->driver->input_mapped(device,
1148                                 hidinput, field, usage, &bit, &max) < 0)
1149                 goto ignore;
1150
1151         set_bit(usage->type, input->evbit);
1152
1153         /*
1154          * This part is *really* controversial:
1155          * - HID aims at being generic so we should do our best to export
1156          *   all incoming events
1157          * - HID describes what events are, so there is no reason for ABS_X
1158          *   to be mapped to ABS_Y
1159          * - HID is using *_MISC+N as a default value, but nothing prevents
1160          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1161          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1162          *   processing)
1163          *
1164          * If devices still want to use this (at their own risk), they will
1165          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1166          * the default should be a reliable mapping.
1167          */
1168         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1169                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1170                         usage->code = find_next_zero_bit(bit,
1171                                                          max + 1,
1172                                                          usage->code);
1173                 } else {
1174                         device->status |= HID_STAT_DUP_DETECTED;
1175                         goto ignore;
1176                 }
1177         }
1178
1179         if (usage->code > max)
1180                 goto ignore;
1181
1182         if (usage->type == EV_ABS) {
1183
1184                 int a = field->logical_minimum;
1185                 int b = field->logical_maximum;
1186
1187                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1188                         a = field->logical_minimum = 0;
1189                         b = field->logical_maximum = 255;
1190                 }
1191
1192                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1193                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1194                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1195
1196                 input_abs_set_res(input, usage->code,
1197                                   hidinput_calc_abs_res(field, usage->code));
1198
1199                 /* use a larger default input buffer for MT devices */
1200                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1201                         input_set_events_per_packet(input, 60);
1202         }
1203
1204         if (usage->type == EV_ABS &&
1205             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1206                 int i;
1207                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1208                         input_set_abs_params(input, i, -1, 1, 0, 0);
1209                         set_bit(i, input->absbit);
1210                 }
1211                 if (usage->hat_dir && !field->dpad)
1212                         field->dpad = usage->code;
1213         }
1214
1215         /* for those devices which produce Consumer volume usage as relative,
1216          * we emulate pressing volumeup/volumedown appropriate number of times
1217          * in hidinput_hid_event()
1218          */
1219         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1220                         (usage->code == ABS_VOLUME)) {
1221                 set_bit(KEY_VOLUMEUP, input->keybit);
1222                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1223         }
1224
1225         if (usage->type == EV_KEY) {
1226                 set_bit(EV_MSC, input->evbit);
1227                 set_bit(MSC_SCAN, input->mscbit);
1228         }
1229
1230 ignore:
1231         return;
1232
1233 }
1234
1235 static void hidinput_handle_scroll(struct hid_usage *usage,
1236                                    struct input_dev *input,
1237                                    __s32 value)
1238 {
1239         int code;
1240         int hi_res, lo_res;
1241
1242         if (value == 0)
1243                 return;
1244
1245         if (usage->code == REL_WHEEL_HI_RES)
1246                 code = REL_WHEEL;
1247         else
1248                 code = REL_HWHEEL;
1249
1250         /*
1251          * Windows reports one wheel click as value 120. Where a high-res
1252          * scroll wheel is present, a fraction of 120 is reported instead.
1253          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1254          * adhere to the 120 expectation.
1255          */
1256         hi_res = value * 120/usage->resolution_multiplier;
1257
1258         usage->wheel_accumulated += hi_res;
1259         lo_res = usage->wheel_accumulated/120;
1260         if (lo_res)
1261                 usage->wheel_accumulated -= lo_res * 120;
1262
1263         input_event(input, EV_REL, code, lo_res);
1264         input_event(input, EV_REL, usage->code, hi_res);
1265 }
1266
1267 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1268 {
1269         struct input_dev *input;
1270         unsigned *quirks = &hid->quirks;
1271
1272         if (!usage->type)
1273                 return;
1274
1275         if (usage->type == EV_PWR) {
1276                 hidinput_update_battery(hid, value);
1277                 return;
1278         }
1279
1280         if (!field->hidinput)
1281                 return;
1282
1283         input = field->hidinput->input;
1284
1285         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1286                 int hat_dir = usage->hat_dir;
1287                 if (!hat_dir)
1288                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1289                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1290                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1291                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1292                 return;
1293         }
1294
1295         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1296                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1297                 return;
1298         }
1299
1300         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1301                 if (value) {
1302                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1303                         return;
1304                 }
1305                 input_event(input, usage->type, usage->code, 0);
1306                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1307                 return;
1308         }
1309
1310         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1311                 int a = field->logical_minimum;
1312                 int b = field->logical_maximum;
1313                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1314         }
1315
1316         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1317                 dbg_hid("Maximum Effects - %d\n",value);
1318                 return;
1319         }
1320
1321         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1322                 dbg_hid("PID Pool Report\n");
1323                 return;
1324         }
1325
1326         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1327                 return;
1328
1329         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1330                                         usage->code == REL_HWHEEL_HI_RES)) {
1331                 hidinput_handle_scroll(usage, input, value);
1332                 return;
1333         }
1334
1335         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1336                         (usage->code == ABS_VOLUME)) {
1337                 int count = abs(value);
1338                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1339                 int i;
1340
1341                 for (i = 0; i < count; i++) {
1342                         input_event(input, EV_KEY, direction, 1);
1343                         input_sync(input);
1344                         input_event(input, EV_KEY, direction, 0);
1345                         input_sync(input);
1346                 }
1347                 return;
1348         }
1349
1350         /*
1351          * Ignore out-of-range values as per HID specification,
1352          * section 5.10 and 6.2.25, when NULL state bit is present.
1353          * When it's not, clamp the value to match Microsoft's input
1354          * driver as mentioned in "Required HID usages for digitizers":
1355          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1356          *
1357          * The logical_minimum < logical_maximum check is done so that we
1358          * don't unintentionally discard values sent by devices which
1359          * don't specify logical min and max.
1360          */
1361         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1362             (field->logical_minimum < field->logical_maximum)) {
1363                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1364                     (value < field->logical_minimum ||
1365                      value > field->logical_maximum)) {
1366                         dbg_hid("Ignoring out-of-range value %x\n", value);
1367                         return;
1368                 }
1369                 value = clamp(value,
1370                               field->logical_minimum,
1371                               field->logical_maximum);
1372         }
1373
1374         /*
1375          * Ignore reports for absolute data if the data didn't change. This is
1376          * not only an optimization but also fixes 'dead' key reports. Some
1377          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1378          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1379          * can only have one of them physically available. The 'dead' keys
1380          * report constant 0. As all map to the same keycode, they'd confuse
1381          * the input layer. If we filter the 'dead' keys on the HID level, we
1382          * skip the keycode translation and only forward real events.
1383          */
1384         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1385                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1386                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1387             usage->usage_index < field->maxusage &&
1388             value == field->value[usage->usage_index])
1389                 return;
1390
1391         /* report the usage code as scancode if the key status has changed */
1392         if (usage->type == EV_KEY &&
1393             (!test_bit(usage->code, input->key)) == value)
1394                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1395
1396         input_event(input, usage->type, usage->code, value);
1397
1398         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1399             usage->type == EV_KEY && value) {
1400                 input_sync(input);
1401                 input_event(input, usage->type, usage->code, 0);
1402         }
1403 }
1404
1405 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1406 {
1407         struct hid_input *hidinput;
1408
1409         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1410                 return;
1411
1412         list_for_each_entry(hidinput, &hid->inputs, list)
1413                 input_sync(hidinput->input);
1414 }
1415 EXPORT_SYMBOL_GPL(hidinput_report_event);
1416
1417 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1418 {
1419         struct hid_report *report;
1420         int i, j;
1421
1422         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1423                 for (i = 0; i < report->maxfield; i++) {
1424                         *field = report->field[i];
1425                         for (j = 0; j < (*field)->maxusage; j++)
1426                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1427                                         return j;
1428                 }
1429         }
1430         return -1;
1431 }
1432 EXPORT_SYMBOL_GPL(hidinput_find_field);
1433
1434 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1435 {
1436         struct hid_report *report;
1437         struct hid_field *field;
1438         int i, j;
1439
1440         list_for_each_entry(report,
1441                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1442                             list) {
1443                 for (i = 0; i < report->maxfield; i++) {
1444                         field = report->field[i];
1445                         for (j = 0; j < field->maxusage; j++)
1446                                 if (field->usage[j].type == EV_LED)
1447                                         return field;
1448                 }
1449         }
1450         return NULL;
1451 }
1452 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1453
1454 unsigned int hidinput_count_leds(struct hid_device *hid)
1455 {
1456         struct hid_report *report;
1457         struct hid_field *field;
1458         int i, j;
1459         unsigned int count = 0;
1460
1461         list_for_each_entry(report,
1462                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1463                             list) {
1464                 for (i = 0; i < report->maxfield; i++) {
1465                         field = report->field[i];
1466                         for (j = 0; j < field->maxusage; j++)
1467                                 if (field->usage[j].type == EV_LED &&
1468                                     field->value[j])
1469                                         count += 1;
1470                 }
1471         }
1472         return count;
1473 }
1474 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1475
1476 static void hidinput_led_worker(struct work_struct *work)
1477 {
1478         struct hid_device *hid = container_of(work, struct hid_device,
1479                                               led_work);
1480         struct hid_field *field;
1481         struct hid_report *report;
1482         int ret;
1483         u32 len;
1484         __u8 *buf;
1485
1486         field = hidinput_get_led_field(hid);
1487         if (!field)
1488                 return;
1489
1490         /*
1491          * field->report is accessed unlocked regarding HID core. So there might
1492          * be another incoming SET-LED request from user-space, which changes
1493          * the LED state while we assemble our outgoing buffer. However, this
1494          * doesn't matter as hid_output_report() correctly converts it into a
1495          * boolean value no matter what information is currently set on the LED
1496          * field (even garbage). So the remote device will always get a valid
1497          * request.
1498          * And in case we send a wrong value, a next led worker is spawned
1499          * for every SET-LED request so the following worker will send the
1500          * correct value, guaranteed!
1501          */
1502
1503         report = field->report;
1504
1505         /* use custom SET_REPORT request if possible (asynchronous) */
1506         if (hid->ll_driver->request)
1507                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1508
1509         /* fall back to generic raw-output-report */
1510         len = hid_report_len(report);
1511         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1512         if (!buf)
1513                 return;
1514
1515         hid_output_report(report, buf);
1516         /* synchronous output report */
1517         ret = hid_hw_output_report(hid, buf, len);
1518         if (ret == -ENOSYS)
1519                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1520                                 HID_REQ_SET_REPORT);
1521         kfree(buf);
1522 }
1523
1524 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1525                                 unsigned int code, int value)
1526 {
1527         struct hid_device *hid = input_get_drvdata(dev);
1528         struct hid_field *field;
1529         int offset;
1530
1531         if (type == EV_FF)
1532                 return input_ff_event(dev, type, code, value);
1533
1534         if (type != EV_LED)
1535                 return -1;
1536
1537         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1538                 hid_warn(dev, "event field not found\n");
1539                 return -1;
1540         }
1541
1542         hid_set_field(field, offset, value);
1543
1544         schedule_work(&hid->led_work);
1545         return 0;
1546 }
1547
1548 static int hidinput_open(struct input_dev *dev)
1549 {
1550         struct hid_device *hid = input_get_drvdata(dev);
1551
1552         return hid_hw_open(hid);
1553 }
1554
1555 static void hidinput_close(struct input_dev *dev)
1556 {
1557         struct hid_device *hid = input_get_drvdata(dev);
1558
1559         hid_hw_close(hid);
1560 }
1561
1562 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1563 {
1564         struct hid_report_enum *rep_enum;
1565         struct hid_report *rep;
1566         struct hid_usage *usage;
1567         int i, j;
1568
1569         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1570         list_for_each_entry(rep, &rep_enum->report_list, list) {
1571                 bool update_needed = false;
1572
1573                 if (rep->maxfield == 0)
1574                         continue;
1575
1576                 /*
1577                  * If we have more than one feature within this report we
1578                  * need to fill in the bits from the others before we can
1579                  * overwrite the ones for the Resolution Multiplier.
1580                  */
1581                 if (rep->maxfield > 1) {
1582                         hid_hw_request(hid, rep, HID_REQ_GET_REPORT);
1583                         hid_hw_wait(hid);
1584                 }
1585
1586                 for (i = 0; i < rep->maxfield; i++) {
1587                         __s32 logical_max = rep->field[i]->logical_maximum;
1588
1589                         /* There is no good reason for a Resolution
1590                          * Multiplier to have a count other than 1.
1591                          * Ignore that case.
1592                          */
1593                         if (rep->field[i]->report_count != 1)
1594                                 continue;
1595
1596                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1597                                 usage = &rep->field[i]->usage[j];
1598
1599                                 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1600                                         continue;
1601
1602                                 *rep->field[i]->value = logical_max;
1603                                 update_needed = true;
1604                         }
1605                 }
1606                 if (update_needed)
1607                         hid_hw_request(hid, rep, HID_REQ_SET_REPORT);
1608         }
1609
1610         /* refresh our structs */
1611         hid_setup_resolution_multiplier(hid);
1612 }
1613
1614 static void report_features(struct hid_device *hid)
1615 {
1616         struct hid_driver *drv = hid->driver;
1617         struct hid_report_enum *rep_enum;
1618         struct hid_report *rep;
1619         struct hid_usage *usage;
1620         int i, j;
1621
1622         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1623         list_for_each_entry(rep, &rep_enum->report_list, list)
1624                 for (i = 0; i < rep->maxfield; i++) {
1625                         /* Ignore if report count is out of bounds. */
1626                         if (rep->field[i]->report_count < 1)
1627                                 continue;
1628
1629                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1630                                 usage = &rep->field[i]->usage[j];
1631
1632                                 /* Verify if Battery Strength feature is available */
1633                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1634                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1635                                                                rep->field[i]);
1636
1637                                 if (drv->feature_mapping)
1638                                         drv->feature_mapping(hid, rep->field[i], usage);
1639                         }
1640                 }
1641 }
1642
1643 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1644                                            unsigned int application)
1645 {
1646         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1647         struct input_dev *input_dev = input_allocate_device();
1648         const char *suffix = NULL;
1649         size_t suffix_len, name_len;
1650
1651         if (!hidinput || !input_dev)
1652                 goto fail;
1653
1654         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1655             hid->maxapplication > 1) {
1656                 switch (application) {
1657                 case HID_GD_KEYBOARD:
1658                         suffix = "Keyboard";
1659                         break;
1660                 case HID_GD_KEYPAD:
1661                         suffix = "Keypad";
1662                         break;
1663                 case HID_GD_MOUSE:
1664                         suffix = "Mouse";
1665                         break;
1666                 case HID_DG_STYLUS:
1667                         suffix = "Pen";
1668                         break;
1669                 case HID_DG_TOUCHSCREEN:
1670                         suffix = "Touchscreen";
1671                         break;
1672                 case HID_DG_TOUCHPAD:
1673                         suffix = "Touchpad";
1674                         break;
1675                 case HID_GD_SYSTEM_CONTROL:
1676                         suffix = "System Control";
1677                         break;
1678                 case HID_CP_CONSUMER_CONTROL:
1679                         suffix = "Consumer Control";
1680                         break;
1681                 case HID_GD_WIRELESS_RADIO_CTLS:
1682                         suffix = "Wireless Radio Control";
1683                         break;
1684                 case HID_GD_SYSTEM_MULTIAXIS:
1685                         suffix = "System Multi Axis";
1686                         break;
1687                 default:
1688                         break;
1689                 }
1690         }
1691
1692         if (suffix) {
1693                 name_len = strlen(hid->name);
1694                 suffix_len = strlen(suffix);
1695                 if ((name_len < suffix_len) ||
1696                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1697                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1698                                                    hid->name, suffix);
1699                         if (!hidinput->name)
1700                                 goto fail;
1701                 }
1702         }
1703
1704         input_set_drvdata(input_dev, hid);
1705         input_dev->event = hidinput_input_event;
1706         input_dev->open = hidinput_open;
1707         input_dev->close = hidinput_close;
1708         input_dev->setkeycode = hidinput_setkeycode;
1709         input_dev->getkeycode = hidinput_getkeycode;
1710
1711         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1712         input_dev->phys = hid->phys;
1713         input_dev->uniq = hid->uniq;
1714         input_dev->id.bustype = hid->bus;
1715         input_dev->id.vendor  = hid->vendor;
1716         input_dev->id.product = hid->product;
1717         input_dev->id.version = hid->version;
1718         input_dev->dev.parent = &hid->dev;
1719
1720         hidinput->input = input_dev;
1721         hidinput->application = application;
1722         list_add_tail(&hidinput->list, &hid->inputs);
1723
1724         INIT_LIST_HEAD(&hidinput->reports);
1725
1726         return hidinput;
1727
1728 fail:
1729         kfree(hidinput);
1730         input_free_device(input_dev);
1731         hid_err(hid, "Out of memory during hid input probe\n");
1732         return NULL;
1733 }
1734
1735 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1736 {
1737         int i;
1738         unsigned long r = 0;
1739
1740         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1741                 r |= hidinput->input->evbit[i];
1742
1743         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1744                 r |= hidinput->input->keybit[i];
1745
1746         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1747                 r |= hidinput->input->relbit[i];
1748
1749         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1750                 r |= hidinput->input->absbit[i];
1751
1752         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1753                 r |= hidinput->input->mscbit[i];
1754
1755         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1756                 r |= hidinput->input->ledbit[i];
1757
1758         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1759                 r |= hidinput->input->sndbit[i];
1760
1761         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1762                 r |= hidinput->input->ffbit[i];
1763
1764         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1765                 r |= hidinput->input->swbit[i];
1766
1767         return !!r;
1768 }
1769
1770 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1771                 struct hid_input *hidinput)
1772 {
1773         struct hid_report *report;
1774         int i, k;
1775
1776         list_del(&hidinput->list);
1777         input_free_device(hidinput->input);
1778         kfree(hidinput->name);
1779
1780         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1781                 if (k == HID_OUTPUT_REPORT &&
1782                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1783                         continue;
1784
1785                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1786                                     list) {
1787
1788                         for (i = 0; i < report->maxfield; i++)
1789                                 if (report->field[i]->hidinput == hidinput)
1790                                         report->field[i]->hidinput = NULL;
1791                 }
1792         }
1793
1794         kfree(hidinput);
1795 }
1796
1797 static struct hid_input *hidinput_match(struct hid_report *report)
1798 {
1799         struct hid_device *hid = report->device;
1800         struct hid_input *hidinput;
1801
1802         list_for_each_entry(hidinput, &hid->inputs, list) {
1803                 if (hidinput->report &&
1804                     hidinput->report->id == report->id)
1805                         return hidinput;
1806         }
1807
1808         return NULL;
1809 }
1810
1811 static struct hid_input *hidinput_match_application(struct hid_report *report)
1812 {
1813         struct hid_device *hid = report->device;
1814         struct hid_input *hidinput;
1815
1816         list_for_each_entry(hidinput, &hid->inputs, list) {
1817                 if (hidinput->application == report->application)
1818                         return hidinput;
1819         }
1820
1821         return NULL;
1822 }
1823
1824 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1825                                              struct hid_report *report)
1826 {
1827         int i, j;
1828
1829         for (i = 0; i < report->maxfield; i++)
1830                 for (j = 0; j < report->field[i]->maxusage; j++)
1831                         hidinput_configure_usage(hidinput, report->field[i],
1832                                                  report->field[i]->usage + j);
1833 }
1834
1835 /*
1836  * Register the input device; print a message.
1837  * Configure the input layer interface
1838  * Read all reports and initialize the absolute field values.
1839  */
1840
1841 int hidinput_connect(struct hid_device *hid, unsigned int force)
1842 {
1843         struct hid_driver *drv = hid->driver;
1844         struct hid_report *report;
1845         struct hid_input *next, *hidinput = NULL;
1846         unsigned int application;
1847         int i, k;
1848
1849         INIT_LIST_HEAD(&hid->inputs);
1850         INIT_WORK(&hid->led_work, hidinput_led_worker);
1851
1852         hid->status &= ~HID_STAT_DUP_DETECTED;
1853
1854         if (!force) {
1855                 for (i = 0; i < hid->maxcollection; i++) {
1856                         struct hid_collection *col = &hid->collection[i];
1857                         if (col->type == HID_COLLECTION_APPLICATION ||
1858                                         col->type == HID_COLLECTION_PHYSICAL)
1859                                 if (IS_INPUT_APPLICATION(col->usage))
1860                                         break;
1861                 }
1862
1863                 if (i == hid->maxcollection)
1864                         return -1;
1865         }
1866
1867         report_features(hid);
1868
1869         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1870                 if (k == HID_OUTPUT_REPORT &&
1871                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1872                         continue;
1873
1874                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1875
1876                         if (!report->maxfield)
1877                                 continue;
1878
1879                         application = report->application;
1880
1881                         /*
1882                          * Find the previous hidinput report attached
1883                          * to this report id.
1884                          */
1885                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1886                                 hidinput = hidinput_match(report);
1887                         else if (hid->maxapplication > 1 &&
1888                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1889                                 hidinput = hidinput_match_application(report);
1890
1891                         if (!hidinput) {
1892                                 hidinput = hidinput_allocate(hid, application);
1893                                 if (!hidinput)
1894                                         goto out_unwind;
1895                         }
1896
1897                         hidinput_configure_usages(hidinput, report);
1898
1899                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1900                                 hidinput->report = report;
1901
1902                         list_add_tail(&report->hidinput_list,
1903                                       &hidinput->reports);
1904                 }
1905         }
1906
1907         hidinput_change_resolution_multipliers(hid);
1908
1909         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1910                 if (drv->input_configured &&
1911                     drv->input_configured(hid, hidinput))
1912                         goto out_unwind;
1913
1914                 if (!hidinput_has_been_populated(hidinput)) {
1915                         /* no need to register an input device not populated */
1916                         hidinput_cleanup_hidinput(hid, hidinput);
1917                         continue;
1918                 }
1919
1920                 if (input_register_device(hidinput->input))
1921                         goto out_unwind;
1922                 hidinput->registered = true;
1923         }
1924
1925         if (list_empty(&hid->inputs)) {
1926                 hid_err(hid, "No inputs registered, leaving\n");
1927                 goto out_unwind;
1928         }
1929
1930         if (hid->status & HID_STAT_DUP_DETECTED)
1931                 hid_dbg(hid,
1932                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1933
1934         return 0;
1935
1936 out_unwind:
1937         /* unwind the ones we already registered */
1938         hidinput_disconnect(hid);
1939
1940         return -1;
1941 }
1942 EXPORT_SYMBOL_GPL(hidinput_connect);
1943
1944 void hidinput_disconnect(struct hid_device *hid)
1945 {
1946         struct hid_input *hidinput, *next;
1947
1948         hidinput_cleanup_battery(hid);
1949
1950         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1951                 list_del(&hidinput->list);
1952                 if (hidinput->registered)
1953                         input_unregister_device(hidinput->input);
1954                 else
1955                         input_free_device(hidinput->input);
1956                 kfree(hidinput->name);
1957                 kfree(hidinput);
1958         }
1959
1960         /* led_work is spawned by input_dev callbacks, but doesn't access the
1961          * parent input_dev at all. Once all input devices are removed, we
1962          * know that led_work will never get restarted, so we can cancel it
1963          * synchronously and are safe. */
1964         cancel_work_sync(&hid->led_work);
1965 }
1966 EXPORT_SYMBOL_GPL(hidinput_disconnect);