48785db10e87a88f4892a16516b656aeec7e4f95
[~shefty/rdma-dev.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 static __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         if (code == ABS_X || code == ABS_Y || code == ABS_Z) {
229                 if (field->unit == 0x11) {              /* If centimeters */
230                         /* Convert to millimeters */
231                         unit_exponent += 1;
232                 } else if (field->unit == 0x13) {       /* If inches */
233                         /* Convert to millimeters */
234                         prev = physical_extents;
235                         physical_extents *= 254;
236                         if (physical_extents < prev)
237                                 return 0;
238                         unit_exponent -= 1;
239                 } else {
240                         return 0;
241                 }
242         } else if (code == ABS_RX || code == ABS_RY || code == ABS_RZ) {
243                 if (field->unit == 0x14) {              /* If degrees */
244                         /* Convert to radians */
245                         prev = logical_extents;
246                         logical_extents *= 573;
247                         if (logical_extents < prev)
248                                 return 0;
249                         unit_exponent += 1;
250                 } else if (field->unit != 0x12) {       /* If not radians */
251                         return 0;
252                 }
253         } else {
254                 return 0;
255         }
256
257         /* Apply negative unit exponent */
258         for (; unit_exponent < 0; unit_exponent++) {
259                 prev = logical_extents;
260                 logical_extents *= 10;
261                 if (logical_extents < prev)
262                         return 0;
263         }
264         /* Apply positive unit exponent */
265         for (; unit_exponent > 0; unit_exponent--) {
266                 prev = physical_extents;
267                 physical_extents *= 10;
268                 if (physical_extents < prev)
269                         return 0;
270         }
271
272         /* Calculate resolution */
273         return logical_extents / physical_extents;
274 }
275
276 #ifdef CONFIG_HID_BATTERY_STRENGTH
277 static enum power_supply_property hidinput_battery_props[] = {
278         POWER_SUPPLY_PROP_PRESENT,
279         POWER_SUPPLY_PROP_ONLINE,
280         POWER_SUPPLY_PROP_CAPACITY,
281         POWER_SUPPLY_PROP_MODEL_NAME,
282         POWER_SUPPLY_PROP_STATUS
283 };
284
285 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
286
287 static const struct hid_device_id hid_battery_quirks[] = {
288         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE),
289           HID_BATTERY_QUIRK_PERCENT },
290         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
291           HID_BATTERY_QUIRK_PERCENT },
292         {}
293 };
294
295 static unsigned find_battery_quirk(struct hid_device *hdev)
296 {
297         unsigned quirks = 0;
298         const struct hid_device_id *match;
299
300         match = hid_match_id(hdev, hid_battery_quirks);
301         if (match != NULL)
302                 quirks = match->driver_data;
303
304         return quirks;
305 }
306
307 static int hidinput_get_battery_property(struct power_supply *psy,
308                                          enum power_supply_property prop,
309                                          union power_supply_propval *val)
310 {
311         struct hid_device *dev = container_of(psy, struct hid_device, battery);
312         int ret = 0;
313         int ret_rep;
314         __u8 buf[2] = {};
315
316         switch (prop) {
317         case POWER_SUPPLY_PROP_PRESENT:
318         case POWER_SUPPLY_PROP_ONLINE:
319                 val->intval = 1;
320                 break;
321
322         case POWER_SUPPLY_PROP_CAPACITY:
323                 ret_rep = dev->hid_get_raw_report(dev, dev->battery_report_id,
324                                                   buf, sizeof(buf),
325                                                   dev->battery_report_type);
326                 if (ret_rep != 2) {
327                         ret = -EINVAL;
328                         break;
329                 }
330
331                 if (dev->battery_min < dev->battery_max &&
332                     buf[1] >= dev->battery_min &&
333                     buf[1] <= dev->battery_max)
334                         val->intval = (100 * (buf[1] - dev->battery_min)) /
335                                 (dev->battery_max - dev->battery_min);
336                 break;
337
338         case POWER_SUPPLY_PROP_MODEL_NAME:
339                 val->strval = dev->name;
340                 break;
341
342         case POWER_SUPPLY_PROP_STATUS:
343                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
344                 break;
345
346         default:
347                 ret = -EINVAL;
348                 break;
349         }
350
351         return ret;
352 }
353
354 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
355 {
356         struct power_supply *battery = &dev->battery;
357         int ret;
358         unsigned quirks;
359         s32 min, max;
360
361         if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
362                 return false;   /* no match */
363
364         if (battery->name != NULL)
365                 goto out;       /* already initialized? */
366
367         battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
368         if (battery->name == NULL)
369                 goto out;
370
371         battery->type = POWER_SUPPLY_TYPE_BATTERY;
372         battery->properties = hidinput_battery_props;
373         battery->num_properties = ARRAY_SIZE(hidinput_battery_props);
374         battery->use_for_apm = 0;
375         battery->get_property = hidinput_get_battery_property;
376
377         quirks = find_battery_quirk(dev);
378
379         min = field->logical_minimum;
380         max = field->logical_maximum;
381
382         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
383                 min = 0;
384                 max = 100;
385         }
386
387         dev->battery_min = min;
388         dev->battery_max = max;
389         dev->battery_report_type = report_type;
390         dev->battery_report_id = field->report->id;
391
392         ret = power_supply_register(&dev->dev, battery);
393         if (ret != 0) {
394                 hid_warn(dev, "can't register power supply: %d\n", ret);
395                 kfree(battery->name);
396                 battery->name = NULL;
397         }
398
399 out:
400         return true;
401 }
402
403 static void hidinput_cleanup_battery(struct hid_device *dev)
404 {
405         if (!dev->battery.name)
406                 return;
407
408         power_supply_unregister(&dev->battery);
409         kfree(dev->battery.name);
410         dev->battery.name = NULL;
411 }
412 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
413 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
414                                    struct hid_field *field)
415 {
416         return false;
417 }
418
419 static void hidinput_cleanup_battery(struct hid_device *dev)
420 {
421 }
422 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
423
424 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
425                                      struct hid_usage *usage)
426 {
427         struct input_dev *input = hidinput->input;
428         struct hid_device *device = input_get_drvdata(input);
429         int max = 0, code;
430         unsigned long *bit = NULL;
431
432         field->hidinput = hidinput;
433
434         if (field->flags & HID_MAIN_ITEM_CONSTANT)
435                 goto ignore;
436
437         /* only LED usages are supported in output fields */
438         if (field->report_type == HID_OUTPUT_REPORT &&
439                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
440                 goto ignore;
441         }
442
443         if (device->driver->input_mapping) {
444                 int ret = device->driver->input_mapping(device, hidinput, field,
445                                 usage, &bit, &max);
446                 if (ret > 0)
447                         goto mapped;
448                 if (ret < 0)
449                         goto ignore;
450         }
451
452         switch (usage->hid & HID_USAGE_PAGE) {
453         case HID_UP_UNDEFINED:
454                 goto ignore;
455
456         case HID_UP_KEYBOARD:
457                 set_bit(EV_REP, input->evbit);
458
459                 if ((usage->hid & HID_USAGE) < 256) {
460                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
461                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
462                 } else
463                         map_key(KEY_UNKNOWN);
464
465                 break;
466
467         case HID_UP_BUTTON:
468                 code = ((usage->hid - 1) & HID_USAGE);
469
470                 switch (field->application) {
471                 case HID_GD_MOUSE:
472                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
473                 case HID_GD_JOYSTICK:
474                                 if (code <= 0xf)
475                                         code += BTN_JOYSTICK;
476                                 else
477                                         code += BTN_TRIGGER_HAPPY;
478                                 break;
479                 case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
480                 default:
481                         switch (field->physical) {
482                         case HID_GD_MOUSE:
483                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
484                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
485                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
486                         default:              code += BTN_MISC;
487                         }
488                 }
489
490                 map_key(code);
491                 break;
492
493         case HID_UP_SIMULATION:
494                 switch (usage->hid & 0xffff) {
495                 case 0xba: map_abs(ABS_RUDDER);   break;
496                 case 0xbb: map_abs(ABS_THROTTLE); break;
497                 case 0xc4: map_abs(ABS_GAS);      break;
498                 case 0xc5: map_abs(ABS_BRAKE);    break;
499                 case 0xc8: map_abs(ABS_WHEEL);    break;
500                 default:   goto ignore;
501                 }
502                 break;
503
504         case HID_UP_GENDESK:
505                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
506                         switch (usage->hid & 0xf) {
507                         case 0x1: map_key_clear(KEY_POWER);  break;
508                         case 0x2: map_key_clear(KEY_SLEEP);  break;
509                         case 0x3: map_key_clear(KEY_WAKEUP); break;
510                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
511                         case 0x5: map_key_clear(KEY_MENU); break;
512                         case 0x6: map_key_clear(KEY_PROG1); break;
513                         case 0x7: map_key_clear(KEY_HELP); break;
514                         case 0x8: map_key_clear(KEY_EXIT); break;
515                         case 0x9: map_key_clear(KEY_SELECT); break;
516                         case 0xa: map_key_clear(KEY_RIGHT); break;
517                         case 0xb: map_key_clear(KEY_LEFT); break;
518                         case 0xc: map_key_clear(KEY_UP); break;
519                         case 0xd: map_key_clear(KEY_DOWN); break;
520                         case 0xe: map_key_clear(KEY_POWER2); break;
521                         case 0xf: map_key_clear(KEY_RESTART); break;
522                         default: goto unknown;
523                         }
524                         break;
525                 }
526
527                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
528                         switch (usage->hid) {
529                         case HID_GD_UP:    usage->hat_dir = 1; break;
530                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
531                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
532                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
533                         default: goto unknown;
534                         }
535                         if (field->dpad) {
536                                 map_abs(field->dpad);
537                                 goto ignore;
538                         }
539                         map_abs(ABS_HAT0X);
540                         break;
541                 }
542
543                 switch (usage->hid) {
544                 /* These usage IDs map directly to the usage codes. */
545                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
546                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
547                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
548                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
549                                 map_rel(usage->hid & 0xf);
550                         else
551                                 map_abs(usage->hid & 0xf);
552                         break;
553
554                 case HID_GD_HATSWITCH:
555                         usage->hat_min = field->logical_minimum;
556                         usage->hat_max = field->logical_maximum;
557                         map_abs(ABS_HAT0X);
558                         break;
559
560                 case HID_GD_START:      map_key_clear(BTN_START);       break;
561                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
562
563                 default: goto unknown;
564                 }
565
566                 break;
567
568         case HID_UP_LED:
569                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
570                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
571                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
572                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
573                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
574                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
575                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
576                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
577                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
578                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
579                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
580                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
581
582                 default: goto ignore;
583                 }
584                 break;
585
586         case HID_UP_DIGITIZER:
587                 switch (usage->hid & 0xff) {
588                 case 0x00: /* Undefined */
589                         goto ignore;
590
591                 case 0x30: /* TipPressure */
592                         if (!test_bit(BTN_TOUCH, input->keybit)) {
593                                 device->quirks |= HID_QUIRK_NOTOUCH;
594                                 set_bit(EV_KEY, input->evbit);
595                                 set_bit(BTN_TOUCH, input->keybit);
596                         }
597                         map_abs_clear(ABS_PRESSURE);
598                         break;
599
600                 case 0x32: /* InRange */
601                         switch (field->physical & 0xff) {
602                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
603                         case 0x22: map_key(BTN_TOOL_FINGER); break;
604                         default: map_key(BTN_TOOL_PEN); break;
605                         }
606                         break;
607
608                 case 0x3c: /* Invert */
609                         map_key_clear(BTN_TOOL_RUBBER);
610                         break;
611
612                 case 0x33: /* Touch */
613                 case 0x42: /* TipSwitch */
614                 case 0x43: /* TipSwitch2 */
615                         device->quirks &= ~HID_QUIRK_NOTOUCH;
616                         map_key_clear(BTN_TOUCH);
617                         break;
618
619                 case 0x44: /* BarrelSwitch */
620                         map_key_clear(BTN_STYLUS);
621                         break;
622
623                 case 0x46: /* TabletPick */
624                         map_key_clear(BTN_STYLUS2);
625                         break;
626
627                 case 0x51: /* ContactID */
628                         device->quirks |= HID_QUIRK_MULTITOUCH;
629                         goto unknown;
630
631                 default:  goto unknown;
632                 }
633                 break;
634
635         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
636                 switch (usage->hid & HID_USAGE) {
637                 case 0x000: goto ignore;
638                 case 0x030: map_key_clear(KEY_POWER);           break;
639                 case 0x031: map_key_clear(KEY_RESTART);         break;
640                 case 0x032: map_key_clear(KEY_SLEEP);           break;
641                 case 0x034: map_key_clear(KEY_SLEEP);           break;
642                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
643                 case 0x036: map_key_clear(BTN_MISC);            break;
644
645                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
646                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
647                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
648                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
649                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
650                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
651                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
652                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
653                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
654
655                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
656                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
657                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
658                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
659                 case 0x069: map_key_clear(KEY_RED);             break;
660                 case 0x06a: map_key_clear(KEY_GREEN);           break;
661                 case 0x06b: map_key_clear(KEY_BLUE);            break;
662                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
663                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
664
665                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
666                 case 0x083: map_key_clear(KEY_LAST);            break;
667                 case 0x084: map_key_clear(KEY_ENTER);           break;
668                 case 0x088: map_key_clear(KEY_PC);              break;
669                 case 0x089: map_key_clear(KEY_TV);              break;
670                 case 0x08a: map_key_clear(KEY_WWW);             break;
671                 case 0x08b: map_key_clear(KEY_DVD);             break;
672                 case 0x08c: map_key_clear(KEY_PHONE);           break;
673                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
674                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
675                 case 0x08f: map_key_clear(KEY_GAMES);           break;
676                 case 0x090: map_key_clear(KEY_MEMO);            break;
677                 case 0x091: map_key_clear(KEY_CD);              break;
678                 case 0x092: map_key_clear(KEY_VCR);             break;
679                 case 0x093: map_key_clear(KEY_TUNER);           break;
680                 case 0x094: map_key_clear(KEY_EXIT);            break;
681                 case 0x095: map_key_clear(KEY_HELP);            break;
682                 case 0x096: map_key_clear(KEY_TAPE);            break;
683                 case 0x097: map_key_clear(KEY_TV2);             break;
684                 case 0x098: map_key_clear(KEY_SAT);             break;
685                 case 0x09a: map_key_clear(KEY_PVR);             break;
686
687                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
688                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
689                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
690
691                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
692                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
693                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
694                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
695                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
696                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
697                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
698                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
699                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
700                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
701                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
702                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
703
704                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
705                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
706                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
707                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
708                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
709                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
710                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
711
712                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
713                 case 0x183: map_key_clear(KEY_CONFIG);          break;
714                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
715                 case 0x185: map_key_clear(KEY_EDITOR);          break;
716                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
717                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
718                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
719                 case 0x189: map_key_clear(KEY_DATABASE);        break;
720                 case 0x18a: map_key_clear(KEY_MAIL);            break;
721                 case 0x18b: map_key_clear(KEY_NEWS);            break;
722                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
723                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
724                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
725                 case 0x191: map_key_clear(KEY_FINANCE);         break;
726                 case 0x192: map_key_clear(KEY_CALC);            break;
727                 case 0x193: map_key_clear(KEY_PLAYER);          break;
728                 case 0x194: map_key_clear(KEY_FILE);            break;
729                 case 0x196: map_key_clear(KEY_WWW);             break;
730                 case 0x199: map_key_clear(KEY_CHAT);            break;
731                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
732                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
733                 case 0x1a6: map_key_clear(KEY_HELP);            break;
734                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
735                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
736                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
737                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
738                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
739                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
740                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
741                 case 0x1bd: map_key_clear(KEY_INFO);            break;
742                 case 0x201: map_key_clear(KEY_NEW);             break;
743                 case 0x202: map_key_clear(KEY_OPEN);            break;
744                 case 0x203: map_key_clear(KEY_CLOSE);           break;
745                 case 0x204: map_key_clear(KEY_EXIT);            break;
746                 case 0x207: map_key_clear(KEY_SAVE);            break;
747                 case 0x208: map_key_clear(KEY_PRINT);           break;
748                 case 0x209: map_key_clear(KEY_PROPS);           break;
749                 case 0x21a: map_key_clear(KEY_UNDO);            break;
750                 case 0x21b: map_key_clear(KEY_COPY);            break;
751                 case 0x21c: map_key_clear(KEY_CUT);             break;
752                 case 0x21d: map_key_clear(KEY_PASTE);           break;
753                 case 0x21f: map_key_clear(KEY_FIND);            break;
754                 case 0x221: map_key_clear(KEY_SEARCH);          break;
755                 case 0x222: map_key_clear(KEY_GOTO);            break;
756                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
757                 case 0x224: map_key_clear(KEY_BACK);            break;
758                 case 0x225: map_key_clear(KEY_FORWARD);         break;
759                 case 0x226: map_key_clear(KEY_STOP);            break;
760                 case 0x227: map_key_clear(KEY_REFRESH);         break;
761                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
762                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
763                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
764                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
765                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
766                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
767                 case 0x238: map_rel(REL_HWHEEL);                break;
768                 case 0x23d: map_key_clear(KEY_EDIT);            break;
769                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
770                 case 0x269: map_key_clear(KEY_INSERT);          break;
771                 case 0x26a: map_key_clear(KEY_DELETE);          break;
772                 case 0x279: map_key_clear(KEY_REDO);            break;
773
774                 case 0x289: map_key_clear(KEY_REPLY);           break;
775                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
776                 case 0x28c: map_key_clear(KEY_SEND);            break;
777
778                 default:    goto ignore;
779                 }
780                 break;
781
782         case HID_UP_GENDEVCTRLS:
783                 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
784                         goto ignore;
785                 else
786                         goto unknown;
787                 break;
788
789         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
790                 set_bit(EV_REP, input->evbit);
791                 switch (usage->hid & HID_USAGE) {
792                 case 0x021: map_key_clear(KEY_PRINT);           break;
793                 case 0x070: map_key_clear(KEY_HP);              break;
794                 case 0x071: map_key_clear(KEY_CAMERA);          break;
795                 case 0x072: map_key_clear(KEY_SOUND);           break;
796                 case 0x073: map_key_clear(KEY_QUESTION);        break;
797                 case 0x080: map_key_clear(KEY_EMAIL);           break;
798                 case 0x081: map_key_clear(KEY_CHAT);            break;
799                 case 0x082: map_key_clear(KEY_SEARCH);          break;
800                 case 0x083: map_key_clear(KEY_CONNECT);         break;
801                 case 0x084: map_key_clear(KEY_FINANCE);         break;
802                 case 0x085: map_key_clear(KEY_SPORT);           break;
803                 case 0x086: map_key_clear(KEY_SHOP);            break;
804                 default:    goto ignore;
805                 }
806                 break;
807
808         case HID_UP_MSVENDOR:
809                 goto ignore;
810
811         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
812                 set_bit(EV_REP, input->evbit);
813                 goto ignore;
814
815         case HID_UP_LOGIVENDOR:
816                 goto ignore;
817
818         case HID_UP_PID:
819                 switch (usage->hid & HID_USAGE) {
820                 case 0xa4: map_key_clear(BTN_DEAD);     break;
821                 default: goto ignore;
822                 }
823                 break;
824
825         default:
826         unknown:
827                 if (field->report_size == 1) {
828                         if (field->report->type == HID_OUTPUT_REPORT) {
829                                 map_led(LED_MISC);
830                                 break;
831                         }
832                         map_key(BTN_MISC);
833                         break;
834                 }
835                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
836                         map_rel(REL_MISC);
837                         break;
838                 }
839                 map_abs(ABS_MISC);
840                 break;
841         }
842
843 mapped:
844         if (device->driver->input_mapped && device->driver->input_mapped(device,
845                                 hidinput, field, usage, &bit, &max) < 0)
846                 goto ignore;
847
848         set_bit(usage->type, input->evbit);
849
850         while (usage->code <= max && test_and_set_bit(usage->code, bit))
851                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
852
853         if (usage->code > max)
854                 goto ignore;
855
856
857         if (usage->type == EV_ABS) {
858
859                 int a = field->logical_minimum;
860                 int b = field->logical_maximum;
861
862                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
863                         a = field->logical_minimum = 0;
864                         b = field->logical_maximum = 255;
865                 }
866
867                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
868                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
869                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
870
871                 input_abs_set_res(input, usage->code,
872                                   hidinput_calc_abs_res(field, usage->code));
873
874                 /* use a larger default input buffer for MT devices */
875                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
876                         input_set_events_per_packet(input, 60);
877         }
878
879         if (usage->type == EV_ABS &&
880             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
881                 int i;
882                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
883                         input_set_abs_params(input, i, -1, 1, 0, 0);
884                         set_bit(i, input->absbit);
885                 }
886                 if (usage->hat_dir && !field->dpad)
887                         field->dpad = usage->code;
888         }
889
890         /* for those devices which produce Consumer volume usage as relative,
891          * we emulate pressing volumeup/volumedown appropriate number of times
892          * in hidinput_hid_event()
893          */
894         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
895                         (usage->code == ABS_VOLUME)) {
896                 set_bit(KEY_VOLUMEUP, input->keybit);
897                 set_bit(KEY_VOLUMEDOWN, input->keybit);
898         }
899
900         if (usage->type == EV_KEY) {
901                 set_bit(EV_MSC, input->evbit);
902                 set_bit(MSC_SCAN, input->mscbit);
903         }
904
905 ignore:
906         return;
907
908 }
909
910 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
911 {
912         struct input_dev *input;
913         unsigned *quirks = &hid->quirks;
914
915         if (!field->hidinput)
916                 return;
917
918         input = field->hidinput->input;
919
920         if (!usage->type)
921                 return;
922
923         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
924                 int hat_dir = usage->hat_dir;
925                 if (!hat_dir)
926                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
927                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
928                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
929                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
930                 return;
931         }
932
933         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
934                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
935                 return;
936         }
937
938         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
939                 if (value) {
940                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
941                         return;
942                 }
943                 input_event(input, usage->type, usage->code, 0);
944                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
945                 return;
946         }
947
948         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
949                 int a = field->logical_minimum;
950                 int b = field->logical_maximum;
951                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
952         }
953
954         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
955                 dbg_hid("Maximum Effects - %d\n",value);
956                 return;
957         }
958
959         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
960                 dbg_hid("PID Pool Report\n");
961                 return;
962         }
963
964         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
965                 return;
966
967         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
968                         (usage->code == ABS_VOLUME)) {
969                 int count = abs(value);
970                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
971                 int i;
972
973                 for (i = 0; i < count; i++) {
974                         input_event(input, EV_KEY, direction, 1);
975                         input_sync(input);
976                         input_event(input, EV_KEY, direction, 0);
977                         input_sync(input);
978                 }
979                 return;
980         }
981
982         /* Ignore out-of-range values as per HID specification, section 5.10 */
983         if (value < field->logical_minimum || value > field->logical_maximum) {
984                 dbg_hid("Ignoring out-of-range value %x\n", value);
985                 return;
986         }
987
988         /* report the usage code as scancode if the key status has changed */
989         if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
990                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
991
992         input_event(input, usage->type, usage->code, value);
993
994         if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
995                 input_event(input, usage->type, usage->code, 0);
996 }
997
998 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
999 {
1000         struct hid_input *hidinput;
1001
1002         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1003                 return;
1004
1005         list_for_each_entry(hidinput, &hid->inputs, list)
1006                 input_sync(hidinput->input);
1007 }
1008 EXPORT_SYMBOL_GPL(hidinput_report_event);
1009
1010 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1011 {
1012         struct hid_report *report;
1013         int i, j;
1014
1015         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1016                 for (i = 0; i < report->maxfield; i++) {
1017                         *field = report->field[i];
1018                         for (j = 0; j < (*field)->maxusage; j++)
1019                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1020                                         return j;
1021                 }
1022         }
1023         return -1;
1024 }
1025 EXPORT_SYMBOL_GPL(hidinput_find_field);
1026
1027 static int hidinput_open(struct input_dev *dev)
1028 {
1029         struct hid_device *hid = input_get_drvdata(dev);
1030
1031         return hid_hw_open(hid);
1032 }
1033
1034 static void hidinput_close(struct input_dev *dev)
1035 {
1036         struct hid_device *hid = input_get_drvdata(dev);
1037
1038         hid_hw_close(hid);
1039 }
1040
1041 static void report_features(struct hid_device *hid)
1042 {
1043         struct hid_driver *drv = hid->driver;
1044         struct hid_report_enum *rep_enum;
1045         struct hid_report *rep;
1046         int i, j;
1047
1048         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1049         list_for_each_entry(rep, &rep_enum->report_list, list)
1050                 for (i = 0; i < rep->maxfield; i++)
1051                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1052                                 /* Verify if Battery Strength feature is available */
1053                                 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1054
1055                                 if (drv->feature_mapping)
1056                                         drv->feature_mapping(hid, rep->field[i],
1057                                                              rep->field[i]->usage + j);
1058                         }
1059 }
1060
1061 /*
1062  * Register the input device; print a message.
1063  * Configure the input layer interface
1064  * Read all reports and initialize the absolute field values.
1065  */
1066
1067 int hidinput_connect(struct hid_device *hid, unsigned int force)
1068 {
1069         struct hid_report *report;
1070         struct hid_input *hidinput = NULL;
1071         struct input_dev *input_dev;
1072         int i, j, k;
1073
1074         INIT_LIST_HEAD(&hid->inputs);
1075
1076         if (!force) {
1077                 for (i = 0; i < hid->maxcollection; i++) {
1078                         struct hid_collection *col = &hid->collection[i];
1079                         if (col->type == HID_COLLECTION_APPLICATION ||
1080                                         col->type == HID_COLLECTION_PHYSICAL)
1081                                 if (IS_INPUT_APPLICATION(col->usage))
1082                                         break;
1083                 }
1084
1085                 if (i == hid->maxcollection)
1086                         return -1;
1087         }
1088
1089         report_features(hid);
1090
1091         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1092                 if (k == HID_OUTPUT_REPORT &&
1093                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1094                         continue;
1095
1096                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1097
1098                         if (!report->maxfield)
1099                                 continue;
1100
1101                         if (!hidinput) {
1102                                 hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1103                                 input_dev = input_allocate_device();
1104                                 if (!hidinput || !input_dev) {
1105                                         kfree(hidinput);
1106                                         input_free_device(input_dev);
1107                                         hid_err(hid, "Out of memory during hid input probe\n");
1108                                         goto out_unwind;
1109                                 }
1110
1111                                 input_set_drvdata(input_dev, hid);
1112                                 input_dev->event =
1113                                         hid->ll_driver->hidinput_input_event;
1114                                 input_dev->open = hidinput_open;
1115                                 input_dev->close = hidinput_close;
1116                                 input_dev->setkeycode = hidinput_setkeycode;
1117                                 input_dev->getkeycode = hidinput_getkeycode;
1118
1119                                 input_dev->name = hid->name;
1120                                 input_dev->phys = hid->phys;
1121                                 input_dev->uniq = hid->uniq;
1122                                 input_dev->id.bustype = hid->bus;
1123                                 input_dev->id.vendor  = hid->vendor;
1124                                 input_dev->id.product = hid->product;
1125                                 input_dev->id.version = hid->version;
1126                                 input_dev->dev.parent = hid->dev.parent;
1127                                 hidinput->input = input_dev;
1128                                 list_add_tail(&hidinput->list, &hid->inputs);
1129                         }
1130
1131                         for (i = 0; i < report->maxfield; i++)
1132                                 for (j = 0; j < report->field[i]->maxusage; j++)
1133                                         hidinput_configure_usage(hidinput, report->field[i],
1134                                                                  report->field[i]->usage + j);
1135
1136                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1137                                 /* This will leave hidinput NULL, so that it
1138                                  * allocates another one if we have more inputs on
1139                                  * the same interface. Some devices (e.g. Happ's
1140                                  * UGCI) cram a lot of unrelated inputs into the
1141                                  * same interface. */
1142                                 hidinput->report = report;
1143                                 if (input_register_device(hidinput->input))
1144                                         goto out_cleanup;
1145                                 hidinput = NULL;
1146                         }
1147                 }
1148         }
1149
1150         if (hid->quirks & HID_QUIRK_MULTITOUCH) {
1151                 /* generic hid does not know how to handle multitouch devices */
1152                 if (hidinput)
1153                         goto out_cleanup;
1154                 goto out_unwind;
1155         }
1156
1157         if (hidinput && input_register_device(hidinput->input))
1158                 goto out_cleanup;
1159
1160         return 0;
1161
1162 out_cleanup:
1163         list_del(&hidinput->list);
1164         input_free_device(hidinput->input);
1165         kfree(hidinput);
1166 out_unwind:
1167         /* unwind the ones we already registered */
1168         hidinput_disconnect(hid);
1169
1170         return -1;
1171 }
1172 EXPORT_SYMBOL_GPL(hidinput_connect);
1173
1174 void hidinput_disconnect(struct hid_device *hid)
1175 {
1176         struct hid_input *hidinput, *next;
1177
1178         hidinput_cleanup_battery(hid);
1179
1180         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1181                 list_del(&hidinput->list);
1182                 input_unregister_device(hidinput->input);
1183                 kfree(hidinput);
1184         }
1185 }
1186 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1187