Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/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         {}
329 };
330 
331 static unsigned find_battery_quirk(struct hid_device *hdev)
332 {
333         unsigned quirks = 0;
334         const struct hid_device_id *match;
335 
336         match = hid_match_id(hdev, hid_battery_quirks);
337         if (match != NULL)
338                 quirks = match->driver_data;
339 
340         return quirks;
341 }
342 
343 static int hidinput_get_battery_property(struct power_supply *psy,
344                                          enum power_supply_property prop,
345                                          union power_supply_propval *val)
346 {
347         struct hid_device *dev = power_supply_get_drvdata(psy);
348         int ret = 0;
349         __u8 *buf;
350 
351         switch (prop) {
352         case POWER_SUPPLY_PROP_PRESENT:
353         case POWER_SUPPLY_PROP_ONLINE:
354                 val->intval = 1;
355                 break;
356 
357         case POWER_SUPPLY_PROP_CAPACITY:
358 
359                 buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
360                 if (!buf) {
361                         ret = -ENOMEM;
362                         break;
363                 }
364                 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
365                                          dev->battery_report_type,
366                                          HID_REQ_GET_REPORT);
367 
368                 if (ret != 2) {
369                         ret = -ENODATA;
370                         kfree(buf);
371                         break;
372                 }
373                 ret = 0;
374 
375                 if (dev->battery_min < dev->battery_max &&
376                     buf[1] >= dev->battery_min &&
377                     buf[1] <= dev->battery_max)
378                         val->intval = (100 * (buf[1] - dev->battery_min)) /
379                                 (dev->battery_max - dev->battery_min);
380                 kfree(buf);
381                 break;
382 
383         case POWER_SUPPLY_PROP_MODEL_NAME:
384                 val->strval = dev->name;
385                 break;
386 
387         case POWER_SUPPLY_PROP_STATUS:
388                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
389                 break;
390 
391         case POWER_SUPPLY_PROP_SCOPE:
392                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
393                 break;
394 
395         default:
396                 ret = -EINVAL;
397                 break;
398         }
399 
400         return ret;
401 }
402 
403 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
404 {
405         struct power_supply_desc *psy_desc = NULL;
406         struct power_supply_config psy_cfg = { .drv_data = dev, };
407         unsigned quirks;
408         s32 min, max;
409 
410         if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
411                 return false;   /* no match */
412 
413         if (dev->battery != NULL)
414                 goto out;       /* already initialized? */
415 
416         quirks = find_battery_quirk(dev);
417 
418         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
419                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
420 
421         if (quirks & HID_BATTERY_QUIRK_IGNORE)
422                 goto out;
423 
424         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
425         if (psy_desc == NULL)
426                 goto out;
427 
428         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
429         if (psy_desc->name == NULL) {
430                 kfree(psy_desc);
431                 goto out;
432         }
433 
434         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
435         psy_desc->properties = hidinput_battery_props;
436         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
437         psy_desc->use_for_apm = 0;
438         psy_desc->get_property = hidinput_get_battery_property;
439 
440         min = field->logical_minimum;
441         max = field->logical_maximum;
442 
443         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
444                 min = 0;
445                 max = 100;
446         }
447 
448         if (quirks & HID_BATTERY_QUIRK_FEATURE)
449                 report_type = HID_FEATURE_REPORT;
450 
451         dev->battery_min = min;
452         dev->battery_max = max;
453         dev->battery_report_type = report_type;
454         dev->battery_report_id = field->report->id;
455 
456         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
457         if (IS_ERR(dev->battery)) {
458                 hid_warn(dev, "can't register power supply: %ld\n",
459                                 PTR_ERR(dev->battery));
460                 kfree(psy_desc->name);
461                 kfree(psy_desc);
462                 dev->battery = NULL;
463         } else {
464                 power_supply_powers(dev->battery, &dev->dev);
465         }
466 
467 out:
468         return true;
469 }
470 
471 static void hidinput_cleanup_battery(struct hid_device *dev)
472 {
473         const struct power_supply_desc *psy_desc;
474 
475         if (!dev->battery)
476                 return;
477 
478         psy_desc = dev->battery->desc;
479         power_supply_unregister(dev->battery);
480         kfree(psy_desc->name);
481         kfree(psy_desc);
482         dev->battery = NULL;
483 }
484 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
485 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
486                                    struct hid_field *field)
487 {
488         return false;
489 }
490 
491 static void hidinput_cleanup_battery(struct hid_device *dev)
492 {
493 }
494 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
495 
496 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
497                                      struct hid_usage *usage)
498 {
499         struct input_dev *input = hidinput->input;
500         struct hid_device *device = input_get_drvdata(input);
501         int max = 0, code;
502         unsigned long *bit = NULL;
503 
504         field->hidinput = hidinput;
505 
506         if (field->flags & HID_MAIN_ITEM_CONSTANT)
507                 goto ignore;
508 
509         /* Ignore if report count is out of bounds. */
510         if (field->report_count < 1)
511                 goto ignore;
512 
513         /* only LED usages are supported in output fields */
514         if (field->report_type == HID_OUTPUT_REPORT &&
515                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
516                 goto ignore;
517         }
518 
519         if (device->driver->input_mapping) {
520                 int ret = device->driver->input_mapping(device, hidinput, field,
521                                 usage, &bit, &max);
522                 if (ret > 0)
523                         goto mapped;
524                 if (ret < 0)
525                         goto ignore;
526         }
527 
528         switch (usage->hid & HID_USAGE_PAGE) {
529         case HID_UP_UNDEFINED:
530                 goto ignore;
531 
532         case HID_UP_KEYBOARD:
533                 set_bit(EV_REP, input->evbit);
534 
535                 if ((usage->hid & HID_USAGE) < 256) {
536                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
537                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
538                 } else
539                         map_key(KEY_UNKNOWN);
540 
541                 break;
542 
543         case HID_UP_BUTTON:
544                 code = ((usage->hid - 1) & HID_USAGE);
545 
546                 switch (field->application) {
547                 case HID_GD_MOUSE:
548                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
549                 case HID_GD_JOYSTICK:
550                                 if (code <= 0xf)
551                                         code += BTN_JOYSTICK;
552                                 else
553                                         code += BTN_TRIGGER_HAPPY - 0x10;
554                                 break;
555                 case HID_GD_GAMEPAD:
556                                 if (code <= 0xf)
557                                         code += BTN_GAMEPAD;
558                                 else
559                                         code += BTN_TRIGGER_HAPPY - 0x10;
560                                 break;
561                 default:
562                         switch (field->physical) {
563                         case HID_GD_MOUSE:
564                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
565                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
566                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
567                         default:              code += BTN_MISC;
568                         }
569                 }
570 
571                 map_key(code);
572                 break;
573 
574         case HID_UP_SIMULATION:
575                 switch (usage->hid & 0xffff) {
576                 case 0xba: map_abs(ABS_RUDDER);   break;
577                 case 0xbb: map_abs(ABS_THROTTLE); break;
578                 case 0xc4: map_abs(ABS_GAS);      break;
579                 case 0xc5: map_abs(ABS_BRAKE);    break;
580                 case 0xc8: map_abs(ABS_WHEEL);    break;
581                 default:   goto ignore;
582                 }
583                 break;
584 
585         case HID_UP_GENDESK:
586                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
587                         switch (usage->hid & 0xf) {
588                         case 0x1: map_key_clear(KEY_POWER);  break;
589                         case 0x2: map_key_clear(KEY_SLEEP);  break;
590                         case 0x3: map_key_clear(KEY_WAKEUP); break;
591                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
592                         case 0x5: map_key_clear(KEY_MENU); break;
593                         case 0x6: map_key_clear(KEY_PROG1); break;
594                         case 0x7: map_key_clear(KEY_HELP); break;
595                         case 0x8: map_key_clear(KEY_EXIT); break;
596                         case 0x9: map_key_clear(KEY_SELECT); break;
597                         case 0xa: map_key_clear(KEY_RIGHT); break;
598                         case 0xb: map_key_clear(KEY_LEFT); break;
599                         case 0xc: map_key_clear(KEY_UP); break;
600                         case 0xd: map_key_clear(KEY_DOWN); break;
601                         case 0xe: map_key_clear(KEY_POWER2); break;
602                         case 0xf: map_key_clear(KEY_RESTART); break;
603                         default: goto unknown;
604                         }
605                         break;
606                 }
607 
608                 /*
609                  * Some lazy vendors declare 255 usages for System Control,
610                  * leading to the creation of ABS_X|Y axis and too many others.
611                  * It wouldn't be a problem if joydev doesn't consider the
612                  * device as a joystick then.
613                  */
614                 if (field->application == HID_GD_SYSTEM_CONTROL)
615                         goto ignore;
616 
617                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
618                         switch (usage->hid) {
619                         case HID_GD_UP:    usage->hat_dir = 1; break;
620                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
621                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
622                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
623                         default: goto unknown;
624                         }
625                         if (field->dpad) {
626                                 map_abs(field->dpad);
627                                 goto ignore;
628                         }
629                         map_abs(ABS_HAT0X);
630                         break;
631                 }
632 
633                 switch (usage->hid) {
634                 /* These usage IDs map directly to the usage codes. */
635                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
636                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
637                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
638                                 map_rel(usage->hid & 0xf);
639                         else
640                                 map_abs_clear(usage->hid & 0xf);
641                         break;
642 
643                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
644                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
645                                 map_rel(usage->hid & 0xf);
646                         else
647                                 map_abs(usage->hid & 0xf);
648                         break;
649 
650                 case HID_GD_HATSWITCH:
651                         usage->hat_min = field->logical_minimum;
652                         usage->hat_max = field->logical_maximum;
653                         map_abs(ABS_HAT0X);
654                         break;
655 
656                 case HID_GD_START:      map_key_clear(BTN_START);       break;
657                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
658 
659                 default: goto unknown;
660                 }
661 
662                 break;
663 
664         case HID_UP_LED:
665                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
666                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
667                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
668                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
669                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
670                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
671                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
672                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
673                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
674                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
675                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
676                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
677 
678                 default: goto ignore;
679                 }
680                 break;
681 
682         case HID_UP_DIGITIZER:
683                 switch (usage->hid & 0xff) {
684                 case 0x00: /* Undefined */
685                         goto ignore;
686 
687                 case 0x30: /* TipPressure */
688                         if (!test_bit(BTN_TOUCH, input->keybit)) {
689                                 device->quirks |= HID_QUIRK_NOTOUCH;
690                                 set_bit(EV_KEY, input->evbit);
691                                 set_bit(BTN_TOUCH, input->keybit);
692                         }
693                         map_abs_clear(ABS_PRESSURE);
694                         break;
695 
696                 case 0x32: /* InRange */
697                         switch (field->physical & 0xff) {
698                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
699                         case 0x22: map_key(BTN_TOOL_FINGER); break;
700                         default: map_key(BTN_TOOL_PEN); break;
701                         }
702                         break;
703 
704                 case 0x3c: /* Invert */
705                         map_key_clear(BTN_TOOL_RUBBER);
706                         break;
707 
708                 case 0x3d: /* X Tilt */
709                         map_abs_clear(ABS_TILT_X);
710                         break;
711 
712                 case 0x3e: /* Y Tilt */
713                         map_abs_clear(ABS_TILT_Y);
714                         break;
715 
716                 case 0x33: /* Touch */
717                 case 0x42: /* TipSwitch */
718                 case 0x43: /* TipSwitch2 */
719                         device->quirks &= ~HID_QUIRK_NOTOUCH;
720                         map_key_clear(BTN_TOUCH);
721                         break;
722 
723                 case 0x44: /* BarrelSwitch */
724                         map_key_clear(BTN_STYLUS);
725                         break;
726 
727                 case 0x46: /* TabletPick */
728                 case 0x5a: /* SecondaryBarrelSwitch */
729                         map_key_clear(BTN_STYLUS2);
730                         break;
731 
732                 case 0x5b: /* TransducerSerialNumber */
733                         usage->type = EV_MSC;
734                         usage->code = MSC_SERIAL;
735                         bit = input->mscbit;
736                         max = MSC_MAX;
737                         break;
738 
739                 default:  goto unknown;
740                 }
741                 break;
742 
743         case HID_UP_TELEPHONY:
744                 switch (usage->hid & HID_USAGE) {
745                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
746                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
747                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
748                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
749                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
750                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
751                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
752                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
753                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
754                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
755                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
756                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
757                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
758                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
759                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
760                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
761                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
762                 default: goto ignore;
763                 }
764                 break;
765 
766         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
767                 switch (usage->hid & HID_USAGE) {
768                 case 0x000: goto ignore;
769                 case 0x030: map_key_clear(KEY_POWER);           break;
770                 case 0x031: map_key_clear(KEY_RESTART);         break;
771                 case 0x032: map_key_clear(KEY_SLEEP);           break;
772                 case 0x034: map_key_clear(KEY_SLEEP);           break;
773                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
774                 case 0x036: map_key_clear(BTN_MISC);            break;
775 
776                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
777                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
778                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
779                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
780                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
781                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
782                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
783                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
784                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
785 
786                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
787                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
788                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
789                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
790                 case 0x069: map_key_clear(KEY_RED);             break;
791                 case 0x06a: map_key_clear(KEY_GREEN);           break;
792                 case 0x06b: map_key_clear(KEY_BLUE);            break;
793                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
794                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
795 
796                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
797                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
798                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
799                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
800                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
801                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
802 
803                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
804                 case 0x083: map_key_clear(KEY_LAST);            break;
805                 case 0x084: map_key_clear(KEY_ENTER);           break;
806                 case 0x088: map_key_clear(KEY_PC);              break;
807                 case 0x089: map_key_clear(KEY_TV);              break;
808                 case 0x08a: map_key_clear(KEY_WWW);             break;
809                 case 0x08b: map_key_clear(KEY_DVD);             break;
810                 case 0x08c: map_key_clear(KEY_PHONE);           break;
811                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
812                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
813                 case 0x08f: map_key_clear(KEY_GAMES);           break;
814                 case 0x090: map_key_clear(KEY_MEMO);            break;
815                 case 0x091: map_key_clear(KEY_CD);              break;
816                 case 0x092: map_key_clear(KEY_VCR);             break;
817                 case 0x093: map_key_clear(KEY_TUNER);           break;
818                 case 0x094: map_key_clear(KEY_EXIT);            break;
819                 case 0x095: map_key_clear(KEY_HELP);            break;
820                 case 0x096: map_key_clear(KEY_TAPE);            break;
821                 case 0x097: map_key_clear(KEY_TV2);             break;
822                 case 0x098: map_key_clear(KEY_SAT);             break;
823                 case 0x09a: map_key_clear(KEY_PVR);             break;
824 
825                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
826                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
827                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
828 
829                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
830                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
831                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
832                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
833                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
834                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
835                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
836                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
837                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
838                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
839                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
840                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
841 
842                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
843                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
844                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
845                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
846                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
847                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
848                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
849                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
850 
851                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
852                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
853                 case 0x183: map_key_clear(KEY_CONFIG);          break;
854                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
855                 case 0x185: map_key_clear(KEY_EDITOR);          break;
856                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
857                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
858                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
859                 case 0x189: map_key_clear(KEY_DATABASE);        break;
860                 case 0x18a: map_key_clear(KEY_MAIL);            break;
861                 case 0x18b: map_key_clear(KEY_NEWS);            break;
862                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
863                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
864                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
865                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
866                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
867                 case 0x191: map_key_clear(KEY_FINANCE);         break;
868                 case 0x192: map_key_clear(KEY_CALC);            break;
869                 case 0x193: map_key_clear(KEY_PLAYER);          break;
870                 case 0x194: map_key_clear(KEY_FILE);            break;
871                 case 0x196: map_key_clear(KEY_WWW);             break;
872                 case 0x199: map_key_clear(KEY_CHAT);            break;
873                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
874                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
875                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
876                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
877                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
878                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
879                 case 0x1a6: map_key_clear(KEY_HELP);            break;
880                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
881                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
882                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
883                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
884                 case 0x1b4: map_key_clear(KEY_FILE);            break;
885                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
886                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
887                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
888                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
889                 case 0x1bd: map_key_clear(KEY_INFO);            break;
890                 case 0x201: map_key_clear(KEY_NEW);             break;
891                 case 0x202: map_key_clear(KEY_OPEN);            break;
892                 case 0x203: map_key_clear(KEY_CLOSE);           break;
893                 case 0x204: map_key_clear(KEY_EXIT);            break;
894                 case 0x207: map_key_clear(KEY_SAVE);            break;
895                 case 0x208: map_key_clear(KEY_PRINT);           break;
896                 case 0x209: map_key_clear(KEY_PROPS);           break;
897                 case 0x21a: map_key_clear(KEY_UNDO);            break;
898                 case 0x21b: map_key_clear(KEY_COPY);            break;
899                 case 0x21c: map_key_clear(KEY_CUT);             break;
900                 case 0x21d: map_key_clear(KEY_PASTE);           break;
901                 case 0x21f: map_key_clear(KEY_FIND);            break;
902                 case 0x221: map_key_clear(KEY_SEARCH);          break;
903                 case 0x222: map_key_clear(KEY_GOTO);            break;
904                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
905                 case 0x224: map_key_clear(KEY_BACK);            break;
906                 case 0x225: map_key_clear(KEY_FORWARD);         break;
907                 case 0x226: map_key_clear(KEY_STOP);            break;
908                 case 0x227: map_key_clear(KEY_REFRESH);         break;
909                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
910                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
911                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
912                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
913                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
914                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
915                 case 0x238: map_rel(REL_HWHEEL);                break;
916                 case 0x23d: map_key_clear(KEY_EDIT);            break;
917                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
918                 case 0x269: map_key_clear(KEY_INSERT);          break;
919                 case 0x26a: map_key_clear(KEY_DELETE);          break;
920                 case 0x279: map_key_clear(KEY_REDO);            break;
921 
922                 case 0x289: map_key_clear(KEY_REPLY);           break;
923                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
924                 case 0x28c: map_key_clear(KEY_SEND);            break;
925 
926                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
927                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
928                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
929                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
930                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
931                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
932 
933                 default: map_key_clear(KEY_UNKNOWN);
934                 }
935                 break;
936 
937         case HID_UP_GENDEVCTRLS:
938                 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
939                         goto ignore;
940                 else
941                         goto unknown;
942                 break;
943 
944         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
945                 set_bit(EV_REP, input->evbit);
946                 switch (usage->hid & HID_USAGE) {
947                 case 0x021: map_key_clear(KEY_PRINT);           break;
948                 case 0x070: map_key_clear(KEY_HP);              break;
949                 case 0x071: map_key_clear(KEY_CAMERA);          break;
950                 case 0x072: map_key_clear(KEY_SOUND);           break;
951                 case 0x073: map_key_clear(KEY_QUESTION);        break;
952                 case 0x080: map_key_clear(KEY_EMAIL);           break;
953                 case 0x081: map_key_clear(KEY_CHAT);            break;
954                 case 0x082: map_key_clear(KEY_SEARCH);          break;
955                 case 0x083: map_key_clear(KEY_CONNECT);         break;
956                 case 0x084: map_key_clear(KEY_FINANCE);         break;
957                 case 0x085: map_key_clear(KEY_SPORT);           break;
958                 case 0x086: map_key_clear(KEY_SHOP);            break;
959                 default:    goto ignore;
960                 }
961                 break;
962 
963         case HID_UP_HPVENDOR2:
964                 set_bit(EV_REP, input->evbit);
965                 switch (usage->hid & HID_USAGE) {
966                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
967                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
968                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
969                 default:    goto ignore;
970                 }
971                 break;
972 
973         case HID_UP_MSVENDOR:
974                 goto ignore;
975 
976         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
977                 set_bit(EV_REP, input->evbit);
978                 goto ignore;
979 
980         case HID_UP_LOGIVENDOR:
981                 /* intentional fallback */
982         case HID_UP_LOGIVENDOR2:
983                 /* intentional fallback */
984         case HID_UP_LOGIVENDOR3:
985                 goto ignore;
986 
987         case HID_UP_PID:
988                 switch (usage->hid & HID_USAGE) {
989                 case 0xa4: map_key_clear(BTN_DEAD);     break;
990                 default: goto ignore;
991                 }
992                 break;
993 
994         default:
995         unknown:
996                 if (field->report_size == 1) {
997                         if (field->report->type == HID_OUTPUT_REPORT) {
998                                 map_led(LED_MISC);
999                                 break;
1000                         }
1001                         map_key(BTN_MISC);
1002                         break;
1003                 }
1004                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1005                         map_rel(REL_MISC);
1006                         break;
1007                 }
1008                 map_abs(ABS_MISC);
1009                 break;
1010         }
1011 
1012 mapped:
1013         if (device->driver->input_mapped && device->driver->input_mapped(device,
1014                                 hidinput, field, usage, &bit, &max) < 0)
1015                 goto ignore;
1016 
1017         set_bit(usage->type, input->evbit);
1018 
1019         while (usage->code <= max && test_and_set_bit(usage->code, bit))
1020                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
1021 
1022         if (usage->code > max)
1023                 goto ignore;
1024 
1025 
1026         if (usage->type == EV_ABS) {
1027 
1028                 int a = field->logical_minimum;
1029                 int b = field->logical_maximum;
1030 
1031                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1032                         a = field->logical_minimum = 0;
1033                         b = field->logical_maximum = 255;
1034                 }
1035 
1036                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1037                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1038                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1039 
1040                 input_abs_set_res(input, usage->code,
1041                                   hidinput_calc_abs_res(field, usage->code));
1042 
1043                 /* use a larger default input buffer for MT devices */
1044                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1045                         input_set_events_per_packet(input, 60);
1046         }
1047 
1048         if (usage->type == EV_ABS &&
1049             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1050                 int i;
1051                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1052                         input_set_abs_params(input, i, -1, 1, 0, 0);
1053                         set_bit(i, input->absbit);
1054                 }
1055                 if (usage->hat_dir && !field->dpad)
1056                         field->dpad = usage->code;
1057         }
1058 
1059         /* for those devices which produce Consumer volume usage as relative,
1060          * we emulate pressing volumeup/volumedown appropriate number of times
1061          * in hidinput_hid_event()
1062          */
1063         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1064                         (usage->code == ABS_VOLUME)) {
1065                 set_bit(KEY_VOLUMEUP, input->keybit);
1066                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1067         }
1068 
1069         if (usage->type == EV_KEY) {
1070                 set_bit(EV_MSC, input->evbit);
1071                 set_bit(MSC_SCAN, input->mscbit);
1072         }
1073 
1074 ignore:
1075         return;
1076 
1077 }
1078 
1079 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1080 {
1081         struct input_dev *input;
1082         unsigned *quirks = &hid->quirks;
1083 
1084         if (!field->hidinput)
1085                 return;
1086 
1087         input = field->hidinput->input;
1088 
1089         if (!usage->type)
1090                 return;
1091 
1092         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1093                 int hat_dir = usage->hat_dir;
1094                 if (!hat_dir)
1095                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1096                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1097                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1098                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1099                 return;
1100         }
1101 
1102         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1103                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1104                 return;
1105         }
1106 
1107         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1108                 if (value) {
1109                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1110                         return;
1111                 }
1112                 input_event(input, usage->type, usage->code, 0);
1113                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1114                 return;
1115         }
1116 
1117         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1118                 int a = field->logical_minimum;
1119                 int b = field->logical_maximum;
1120                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1121         }
1122 
1123         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1124                 dbg_hid("Maximum Effects - %d\n",value);
1125                 return;
1126         }
1127 
1128         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1129                 dbg_hid("PID Pool Report\n");
1130                 return;
1131         }
1132 
1133         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1134                 return;
1135 
1136         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1137                         (usage->code == ABS_VOLUME)) {
1138                 int count = abs(value);
1139                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1140                 int i;
1141 
1142                 for (i = 0; i < count; i++) {
1143                         input_event(input, EV_KEY, direction, 1);
1144                         input_sync(input);
1145                         input_event(input, EV_KEY, direction, 0);
1146                         input_sync(input);
1147                 }
1148                 return;
1149         }
1150 
1151         /*
1152          * Ignore out-of-range values as per HID specification,
1153          * section 5.10 and 6.2.25.
1154          *
1155          * The logical_minimum < logical_maximum check is done so that we
1156          * don't unintentionally discard values sent by devices which
1157          * don't specify logical min and max.
1158          */
1159         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1160             (field->logical_minimum < field->logical_maximum) &&
1161             (value < field->logical_minimum ||
1162              value > field->logical_maximum)) {
1163                 dbg_hid("Ignoring out-of-range value %x\n", value);
1164                 return;
1165         }
1166 
1167         /*
1168          * Ignore reports for absolute data if the data didn't change. This is
1169          * not only an optimization but also fixes 'dead' key reports. Some
1170          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1171          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1172          * can only have one of them physically available. The 'dead' keys
1173          * report constant 0. As all map to the same keycode, they'd confuse
1174          * the input layer. If we filter the 'dead' keys on the HID level, we
1175          * skip the keycode translation and only forward real events.
1176          */
1177         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1178                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1179                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1180             usage->usage_index < field->maxusage &&
1181             value == field->value[usage->usage_index])
1182                 return;
1183 
1184         /* report the usage code as scancode if the key status has changed */
1185         if (usage->type == EV_KEY &&
1186             (!test_bit(usage->code, input->key)) == value)
1187                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1188 
1189         input_event(input, usage->type, usage->code, value);
1190 
1191         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1192             usage->type == EV_KEY && value) {
1193                 input_sync(input);
1194                 input_event(input, usage->type, usage->code, 0);
1195         }
1196 }
1197 
1198 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1199 {
1200         struct hid_input *hidinput;
1201 
1202         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1203                 return;
1204 
1205         list_for_each_entry(hidinput, &hid->inputs, list)
1206                 input_sync(hidinput->input);
1207 }
1208 EXPORT_SYMBOL_GPL(hidinput_report_event);
1209 
1210 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1211 {
1212         struct hid_report *report;
1213         int i, j;
1214 
1215         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1216                 for (i = 0; i < report->maxfield; i++) {
1217                         *field = report->field[i];
1218                         for (j = 0; j < (*field)->maxusage; j++)
1219                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1220                                         return j;
1221                 }
1222         }
1223         return -1;
1224 }
1225 EXPORT_SYMBOL_GPL(hidinput_find_field);
1226 
1227 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1228 {
1229         struct hid_report *report;
1230         struct hid_field *field;
1231         int i, j;
1232 
1233         list_for_each_entry(report,
1234                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1235                             list) {
1236                 for (i = 0; i < report->maxfield; i++) {
1237                         field = report->field[i];
1238                         for (j = 0; j < field->maxusage; j++)
1239                                 if (field->usage[j].type == EV_LED)
1240                                         return field;
1241                 }
1242         }
1243         return NULL;
1244 }
1245 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1246 
1247 unsigned int hidinput_count_leds(struct hid_device *hid)
1248 {
1249         struct hid_report *report;
1250         struct hid_field *field;
1251         int i, j;
1252         unsigned int count = 0;
1253 
1254         list_for_each_entry(report,
1255                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1256                             list) {
1257                 for (i = 0; i < report->maxfield; i++) {
1258                         field = report->field[i];
1259                         for (j = 0; j < field->maxusage; j++)
1260                                 if (field->usage[j].type == EV_LED &&
1261                                     field->value[j])
1262                                         count += 1;
1263                 }
1264         }
1265         return count;
1266 }
1267 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1268 
1269 static void hidinput_led_worker(struct work_struct *work)
1270 {
1271         struct hid_device *hid = container_of(work, struct hid_device,
1272                                               led_work);
1273         struct hid_field *field;
1274         struct hid_report *report;
1275         int len, ret;
1276         __u8 *buf;
1277 
1278         field = hidinput_get_led_field(hid);
1279         if (!field)
1280                 return;
1281 
1282         /*
1283          * field->report is accessed unlocked regarding HID core. So there might
1284          * be another incoming SET-LED request from user-space, which changes
1285          * the LED state while we assemble our outgoing buffer. However, this
1286          * doesn't matter as hid_output_report() correctly converts it into a
1287          * boolean value no matter what information is currently set on the LED
1288          * field (even garbage). So the remote device will always get a valid
1289          * request.
1290          * And in case we send a wrong value, a next led worker is spawned
1291          * for every SET-LED request so the following worker will send the
1292          * correct value, guaranteed!
1293          */
1294 
1295         report = field->report;
1296 
1297         /* use custom SET_REPORT request if possible (asynchronous) */
1298         if (hid->ll_driver->request)
1299                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1300 
1301         /* fall back to generic raw-output-report */
1302         len = hid_report_len(report);
1303         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1304         if (!buf)
1305                 return;
1306 
1307         hid_output_report(report, buf);
1308         /* synchronous output report */
1309         ret = hid_hw_output_report(hid, buf, len);
1310         if (ret == -ENOSYS)
1311                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1312                                 HID_REQ_SET_REPORT);
1313         kfree(buf);
1314 }
1315 
1316 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1317                                 unsigned int code, int value)
1318 {
1319         struct hid_device *hid = input_get_drvdata(dev);
1320         struct hid_field *field;
1321         int offset;
1322 
1323         if (type == EV_FF)
1324                 return input_ff_event(dev, type, code, value);
1325 
1326         if (type != EV_LED)
1327                 return -1;
1328 
1329         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1330                 hid_warn(dev, "event field not found\n");
1331                 return -1;
1332         }
1333 
1334         hid_set_field(field, offset, value);
1335 
1336         schedule_work(&hid->led_work);
1337         return 0;
1338 }
1339 
1340 static int hidinput_open(struct input_dev *dev)
1341 {
1342         struct hid_device *hid = input_get_drvdata(dev);
1343 
1344         return hid_hw_open(hid);
1345 }
1346 
1347 static void hidinput_close(struct input_dev *dev)
1348 {
1349         struct hid_device *hid = input_get_drvdata(dev);
1350 
1351         hid_hw_close(hid);
1352 }
1353 
1354 static void report_features(struct hid_device *hid)
1355 {
1356         struct hid_driver *drv = hid->driver;
1357         struct hid_report_enum *rep_enum;
1358         struct hid_report *rep;
1359         int i, j;
1360 
1361         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1362         list_for_each_entry(rep, &rep_enum->report_list, list)
1363                 for (i = 0; i < rep->maxfield; i++) {
1364                         /* Ignore if report count is out of bounds. */
1365                         if (rep->field[i]->report_count < 1)
1366                                 continue;
1367 
1368                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1369                                 /* Verify if Battery Strength feature is available */
1370                                 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1371 
1372                                 if (drv->feature_mapping)
1373                                         drv->feature_mapping(hid, rep->field[i],
1374                                                              rep->field[i]->usage + j);
1375                         }
1376                 }
1377 }
1378 
1379 static struct hid_input *hidinput_allocate(struct hid_device *hid)
1380 {
1381         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1382         struct input_dev *input_dev = input_allocate_device();
1383         if (!hidinput || !input_dev) {
1384                 kfree(hidinput);
1385                 input_free_device(input_dev);
1386                 hid_err(hid, "Out of memory during hid input probe\n");
1387                 return NULL;
1388         }
1389 
1390         input_set_drvdata(input_dev, hid);
1391         input_dev->event = hidinput_input_event;
1392         input_dev->open = hidinput_open;
1393         input_dev->close = hidinput_close;
1394         input_dev->setkeycode = hidinput_setkeycode;
1395         input_dev->getkeycode = hidinput_getkeycode;
1396 
1397         input_dev->name = hid->name;
1398         input_dev->phys = hid->phys;
1399         input_dev->uniq = hid->uniq;
1400         input_dev->id.bustype = hid->bus;
1401         input_dev->id.vendor  = hid->vendor;
1402         input_dev->id.product = hid->product;
1403         input_dev->id.version = hid->version;
1404         input_dev->dev.parent = &hid->dev;
1405         hidinput->input = input_dev;
1406         list_add_tail(&hidinput->list, &hid->inputs);
1407 
1408         return hidinput;
1409 }
1410 
1411 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1412 {
1413         int i;
1414         unsigned long r = 0;
1415 
1416         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1417                 r |= hidinput->input->evbit[i];
1418 
1419         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1420                 r |= hidinput->input->keybit[i];
1421 
1422         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1423                 r |= hidinput->input->relbit[i];
1424 
1425         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1426                 r |= hidinput->input->absbit[i];
1427 
1428         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1429                 r |= hidinput->input->mscbit[i];
1430 
1431         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1432                 r |= hidinput->input->ledbit[i];
1433 
1434         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1435                 r |= hidinput->input->sndbit[i];
1436 
1437         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1438                 r |= hidinput->input->ffbit[i];
1439 
1440         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1441                 r |= hidinput->input->swbit[i];
1442 
1443         return !!r;
1444 }
1445 
1446 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1447                 struct hid_input *hidinput)
1448 {
1449         struct hid_report *report;
1450         int i, k;
1451 
1452         list_del(&hidinput->list);
1453         input_free_device(hidinput->input);
1454 
1455         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1456                 if (k == HID_OUTPUT_REPORT &&
1457                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1458                         continue;
1459 
1460                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1461                                     list) {
1462 
1463                         for (i = 0; i < report->maxfield; i++)
1464                                 if (report->field[i]->hidinput == hidinput)
1465                                         report->field[i]->hidinput = NULL;
1466                 }
1467         }
1468 
1469         kfree(hidinput);
1470 }
1471 
1472 static struct hid_input *hidinput_match(struct hid_report *report)
1473 {
1474         struct hid_device *hid = report->device;
1475         struct hid_input *hidinput;
1476 
1477         list_for_each_entry(hidinput, &hid->inputs, list) {
1478                 if (hidinput->report &&
1479                     hidinput->report->id == report->id)
1480                         return hidinput;
1481         }
1482 
1483         return NULL;
1484 }
1485 
1486 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1487                                              struct hid_report *report)
1488 {
1489         int i, j;
1490 
1491         for (i = 0; i < report->maxfield; i++)
1492                 for (j = 0; j < report->field[i]->maxusage; j++)
1493                         hidinput_configure_usage(hidinput, report->field[i],
1494                                                  report->field[i]->usage + j);
1495 }
1496 
1497 /*
1498  * Register the input device; print a message.
1499  * Configure the input layer interface
1500  * Read all reports and initialize the absolute field values.
1501  */
1502 
1503 int hidinput_connect(struct hid_device *hid, unsigned int force)
1504 {
1505         struct hid_driver *drv = hid->driver;
1506         struct hid_report *report;
1507         struct hid_input *next, *hidinput = NULL;
1508         int i, k;
1509 
1510         INIT_LIST_HEAD(&hid->inputs);
1511         INIT_WORK(&hid->led_work, hidinput_led_worker);
1512 
1513         if (!force) {
1514                 for (i = 0; i < hid->maxcollection; i++) {
1515                         struct hid_collection *col = &hid->collection[i];
1516                         if (col->type == HID_COLLECTION_APPLICATION ||
1517                                         col->type == HID_COLLECTION_PHYSICAL)
1518                                 if (IS_INPUT_APPLICATION(col->usage))
1519                                         break;
1520                 }
1521 
1522                 if (i == hid->maxcollection)
1523                         return -1;
1524         }
1525 
1526         report_features(hid);
1527 
1528         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1529                 if (k == HID_OUTPUT_REPORT &&
1530                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1531                         continue;
1532 
1533                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1534 
1535                         if (!report->maxfield)
1536                                 continue;
1537 
1538                         /*
1539                          * Find the previous hidinput report attached
1540                          * to this report id.
1541                          */
1542                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1543                                 hidinput = hidinput_match(report);
1544 
1545                         if (!hidinput) {
1546                                 hidinput = hidinput_allocate(hid);
1547                                 if (!hidinput)
1548                                         goto out_unwind;
1549                         }
1550 
1551                         hidinput_configure_usages(hidinput, report);
1552 
1553                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1554                                 hidinput->report = report;
1555                 }
1556         }
1557 
1558         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1559                 if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1560                     !hidinput_has_been_populated(hidinput)) {
1561                         /* no need to register an input device not populated */
1562                         hidinput_cleanup_hidinput(hid, hidinput);
1563                         continue;
1564                 }
1565 
1566                 if (drv->input_configured &&
1567                     drv->input_configured(hid, hidinput))
1568                         goto out_unwind;
1569                 if (input_register_device(hidinput->input))
1570                         goto out_unwind;
1571                 hidinput->registered = true;
1572         }
1573 
1574         if (list_empty(&hid->inputs)) {
1575                 hid_err(hid, "No inputs registered, leaving\n");
1576                 goto out_unwind;
1577         }
1578 
1579         return 0;
1580 
1581 out_unwind:
1582         /* unwind the ones we already registered */
1583         hidinput_disconnect(hid);
1584 
1585         return -1;
1586 }
1587 EXPORT_SYMBOL_GPL(hidinput_connect);
1588 
1589 void hidinput_disconnect(struct hid_device *hid)
1590 {
1591         struct hid_input *hidinput, *next;
1592 
1593         hidinput_cleanup_battery(hid);
1594 
1595         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1596                 list_del(&hidinput->list);
1597                 if (hidinput->registered)
1598                         input_unregister_device(hidinput->input);
1599                 else
1600                         input_free_device(hidinput->input);
1601                 kfree(hidinput);
1602         }
1603 
1604         /* led_work is spawned by input_dev callbacks, but doesn't access the
1605          * parent input_dev at all. Once all input devices are removed, we
1606          * know that led_work will never get restarted, so we can cancel it
1607          * synchronously and are safe. */
1608         cancel_work_sync(&hid->led_work);
1609 }
1610 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1611 
1612 

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