Version:  2.0.40 2.2.26 2.4.37 3.12 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

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_TILT_X:
257         case ABS_TILT_Y:
258                 if (field->unit == 0x14) {              /* If degrees */
259                         /* Convert to radians */
260                         prev = logical_extents;
261                         logical_extents *= 573;
262                         if (logical_extents < prev)
263                                 return 0;
264                         unit_exponent += 1;
265                 } else if (field->unit != 0x12) {       /* If not radians */
266                         return 0;
267                 }
268                 break;
269 
270         default:
271                 return 0;
272         }
273 
274         /* Apply negative unit exponent */
275         for (; unit_exponent < 0; unit_exponent++) {
276                 prev = logical_extents;
277                 logical_extents *= 10;
278                 if (logical_extents < prev)
279                         return 0;
280         }
281         /* Apply positive unit exponent */
282         for (; unit_exponent > 0; unit_exponent--) {
283                 prev = physical_extents;
284                 physical_extents *= 10;
285                 if (physical_extents < prev)
286                         return 0;
287         }
288 
289         /* Calculate resolution */
290         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
291 }
292 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
293 
294 #ifdef CONFIG_HID_BATTERY_STRENGTH
295 static enum power_supply_property hidinput_battery_props[] = {
296         POWER_SUPPLY_PROP_PRESENT,
297         POWER_SUPPLY_PROP_ONLINE,
298         POWER_SUPPLY_PROP_CAPACITY,
299         POWER_SUPPLY_PROP_MODEL_NAME,
300         POWER_SUPPLY_PROP_STATUS,
301         POWER_SUPPLY_PROP_SCOPE,
302 };
303 
304 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
305 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
306 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
307 
308 static const struct hid_device_id hid_battery_quirks[] = {
309         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
310                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
311           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
312         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
313                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
314           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
315         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
316                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
317           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
318         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
319                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
320           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
321         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
322                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
323           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
324         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
325                 USB_DEVICE_ID_ELECOM_BM084),
326           HID_BATTERY_QUIRK_IGNORE },
327         {}
328 };
329 
330 static unsigned find_battery_quirk(struct hid_device *hdev)
331 {
332         unsigned quirks = 0;
333         const struct hid_device_id *match;
334 
335         match = hid_match_id(hdev, hid_battery_quirks);
336         if (match != NULL)
337                 quirks = match->driver_data;
338 
339         return quirks;
340 }
341 
342 static int hidinput_get_battery_property(struct power_supply *psy,
343                                          enum power_supply_property prop,
344                                          union power_supply_propval *val)
345 {
346         struct hid_device *dev = power_supply_get_drvdata(psy);
347         int ret = 0;
348         __u8 *buf;
349 
350         switch (prop) {
351         case POWER_SUPPLY_PROP_PRESENT:
352         case POWER_SUPPLY_PROP_ONLINE:
353                 val->intval = 1;
354                 break;
355 
356         case POWER_SUPPLY_PROP_CAPACITY:
357 
358                 buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
359                 if (!buf) {
360                         ret = -ENOMEM;
361                         break;
362                 }
363                 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
364                                          dev->battery_report_type,
365                                          HID_REQ_GET_REPORT);
366 
367                 if (ret != 2) {
368                         ret = -ENODATA;
369                         kfree(buf);
370                         break;
371                 }
372                 ret = 0;
373 
374                 if (dev->battery_min < dev->battery_max &&
375                     buf[1] >= dev->battery_min &&
376                     buf[1] <= dev->battery_max)
377                         val->intval = (100 * (buf[1] - dev->battery_min)) /
378                                 (dev->battery_max - dev->battery_min);
379                 kfree(buf);
380                 break;
381 
382         case POWER_SUPPLY_PROP_MODEL_NAME:
383                 val->strval = dev->name;
384                 break;
385 
386         case POWER_SUPPLY_PROP_STATUS:
387                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
388                 break;
389 
390         case POWER_SUPPLY_PROP_SCOPE:
391                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
392                 break;
393 
394         default:
395                 ret = -EINVAL;
396                 break;
397         }
398 
399         return ret;
400 }
401 
402 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
403 {
404         struct power_supply_desc *psy_desc = NULL;
405         struct power_supply_config psy_cfg = { .drv_data = dev, };
406         unsigned quirks;
407         s32 min, max;
408 
409         if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
410                 return false;   /* no match */
411 
412         if (dev->battery != NULL)
413                 goto out;       /* already initialized? */
414 
415         quirks = find_battery_quirk(dev);
416 
417         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
418                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
419 
420         if (quirks & HID_BATTERY_QUIRK_IGNORE)
421                 goto out;
422 
423         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
424         if (psy_desc == NULL)
425                 goto out;
426 
427         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
428         if (psy_desc->name == NULL) {
429                 kfree(psy_desc);
430                 goto out;
431         }
432 
433         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
434         psy_desc->properties = hidinput_battery_props;
435         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
436         psy_desc->use_for_apm = 0;
437         psy_desc->get_property = hidinput_get_battery_property;
438 
439         min = field->logical_minimum;
440         max = field->logical_maximum;
441 
442         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
443                 min = 0;
444                 max = 100;
445         }
446 
447         if (quirks & HID_BATTERY_QUIRK_FEATURE)
448                 report_type = HID_FEATURE_REPORT;
449 
450         dev->battery_min = min;
451         dev->battery_max = max;
452         dev->battery_report_type = report_type;
453         dev->battery_report_id = field->report->id;
454 
455         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
456         if (IS_ERR(dev->battery)) {
457                 hid_warn(dev, "can't register power supply: %ld\n",
458                                 PTR_ERR(dev->battery));
459                 kfree(psy_desc->name);
460                 kfree(psy_desc);
461                 dev->battery = NULL;
462         } else {
463                 power_supply_powers(dev->battery, &dev->dev);
464         }
465 
466 out:
467         return true;
468 }
469 
470 static void hidinput_cleanup_battery(struct hid_device *dev)
471 {
472         const struct power_supply_desc *psy_desc;
473 
474         if (!dev->battery)
475                 return;
476 
477         psy_desc = dev->battery->desc;
478         power_supply_unregister(dev->battery);
479         kfree(psy_desc->name);
480         kfree(psy_desc);
481         dev->battery = NULL;
482 }
483 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
484 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
485                                    struct hid_field *field)
486 {
487         return false;
488 }
489 
490 static void hidinput_cleanup_battery(struct hid_device *dev)
491 {
492 }
493 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
494 
495 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
496                                      struct hid_usage *usage)
497 {
498         struct input_dev *input = hidinput->input;
499         struct hid_device *device = input_get_drvdata(input);
500         int max = 0, code;
501         unsigned long *bit = NULL;
502 
503         field->hidinput = hidinput;
504 
505         if (field->flags & HID_MAIN_ITEM_CONSTANT)
506                 goto ignore;
507 
508         /* Ignore if report count is out of bounds. */
509         if (field->report_count < 1)
510                 goto ignore;
511 
512         /* only LED usages are supported in output fields */
513         if (field->report_type == HID_OUTPUT_REPORT &&
514                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
515                 goto ignore;
516         }
517 
518         if (device->driver->input_mapping) {
519                 int ret = device->driver->input_mapping(device, hidinput, field,
520                                 usage, &bit, &max);
521                 if (ret > 0)
522                         goto mapped;
523                 if (ret < 0)
524                         goto ignore;
525         }
526 
527         switch (usage->hid & HID_USAGE_PAGE) {
528         case HID_UP_UNDEFINED:
529                 goto ignore;
530 
531         case HID_UP_KEYBOARD:
532                 set_bit(EV_REP, input->evbit);
533 
534                 if ((usage->hid & HID_USAGE) < 256) {
535                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
536                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
537                 } else
538                         map_key(KEY_UNKNOWN);
539 
540                 break;
541 
542         case HID_UP_BUTTON:
543                 code = ((usage->hid - 1) & HID_USAGE);
544 
545                 switch (field->application) {
546                 case HID_GD_MOUSE:
547                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
548                 case HID_GD_JOYSTICK:
549                                 if (code <= 0xf)
550                                         code += BTN_JOYSTICK;
551                                 else
552                                         code += BTN_TRIGGER_HAPPY - 0x10;
553                                 break;
554                 case HID_GD_GAMEPAD:
555                                 if (code <= 0xf)
556                                         code += BTN_GAMEPAD;
557                                 else
558                                         code += BTN_TRIGGER_HAPPY - 0x10;
559                                 break;
560                 default:
561                         switch (field->physical) {
562                         case HID_GD_MOUSE:
563                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
564                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
565                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
566                         default:              code += BTN_MISC;
567                         }
568                 }
569 
570                 map_key(code);
571                 break;
572 
573         case HID_UP_SIMULATION:
574                 switch (usage->hid & 0xffff) {
575                 case 0xba: map_abs(ABS_RUDDER);   break;
576                 case 0xbb: map_abs(ABS_THROTTLE); break;
577                 case 0xc4: map_abs(ABS_GAS);      break;
578                 case 0xc5: map_abs(ABS_BRAKE);    break;
579                 case 0xc8: map_abs(ABS_WHEEL);    break;
580                 default:   goto ignore;
581                 }
582                 break;
583 
584         case HID_UP_GENDESK:
585                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
586                         switch (usage->hid & 0xf) {
587                         case 0x1: map_key_clear(KEY_POWER);  break;
588                         case 0x2: map_key_clear(KEY_SLEEP);  break;
589                         case 0x3: map_key_clear(KEY_WAKEUP); break;
590                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
591                         case 0x5: map_key_clear(KEY_MENU); break;
592                         case 0x6: map_key_clear(KEY_PROG1); break;
593                         case 0x7: map_key_clear(KEY_HELP); break;
594                         case 0x8: map_key_clear(KEY_EXIT); break;
595                         case 0x9: map_key_clear(KEY_SELECT); break;
596                         case 0xa: map_key_clear(KEY_RIGHT); break;
597                         case 0xb: map_key_clear(KEY_LEFT); break;
598                         case 0xc: map_key_clear(KEY_UP); break;
599                         case 0xd: map_key_clear(KEY_DOWN); break;
600                         case 0xe: map_key_clear(KEY_POWER2); break;
601                         case 0xf: map_key_clear(KEY_RESTART); break;
602                         default: goto unknown;
603                         }
604                         break;
605                 }
606 
607                 /*
608                  * Some lazy vendors declare 255 usages for System Control,
609                  * leading to the creation of ABS_X|Y axis and too many others.
610                  * It wouldn't be a problem if joydev doesn't consider the
611                  * device as a joystick then.
612                  */
613                 if (field->application == HID_GD_SYSTEM_CONTROL)
614                         goto ignore;
615 
616                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
617                         switch (usage->hid) {
618                         case HID_GD_UP:    usage->hat_dir = 1; break;
619                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
620                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
621                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
622                         default: goto unknown;
623                         }
624                         if (field->dpad) {
625                                 map_abs(field->dpad);
626                                 goto ignore;
627                         }
628                         map_abs(ABS_HAT0X);
629                         break;
630                 }
631 
632                 switch (usage->hid) {
633                 /* These usage IDs map directly to the usage codes. */
634                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
635                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
636                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
637                                 map_rel(usage->hid & 0xf);
638                         else
639                                 map_abs_clear(usage->hid & 0xf);
640                         break;
641 
642                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
643                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
644                                 map_rel(usage->hid & 0xf);
645                         else
646                                 map_abs(usage->hid & 0xf);
647                         break;
648 
649                 case HID_GD_HATSWITCH:
650                         usage->hat_min = field->logical_minimum;
651                         usage->hat_max = field->logical_maximum;
652                         map_abs(ABS_HAT0X);
653                         break;
654 
655                 case HID_GD_START:      map_key_clear(BTN_START);       break;
656                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
657 
658                 default: goto unknown;
659                 }
660 
661                 break;
662 
663         case HID_UP_LED:
664                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
665                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
666                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
667                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
668                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
669                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
670                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
671                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
672                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
673                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
674                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
675                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
676 
677                 default: goto ignore;
678                 }
679                 break;
680 
681         case HID_UP_DIGITIZER:
682                 switch (usage->hid & 0xff) {
683                 case 0x00: /* Undefined */
684                         goto ignore;
685 
686                 case 0x30: /* TipPressure */
687                         if (!test_bit(BTN_TOUCH, input->keybit)) {
688                                 device->quirks |= HID_QUIRK_NOTOUCH;
689                                 set_bit(EV_KEY, input->evbit);
690                                 set_bit(BTN_TOUCH, input->keybit);
691                         }
692                         map_abs_clear(ABS_PRESSURE);
693                         break;
694 
695                 case 0x32: /* InRange */
696                         switch (field->physical & 0xff) {
697                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
698                         case 0x22: map_key(BTN_TOOL_FINGER); break;
699                         default: map_key(BTN_TOOL_PEN); break;
700                         }
701                         break;
702 
703                 case 0x3c: /* Invert */
704                         map_key_clear(BTN_TOOL_RUBBER);
705                         break;
706 
707                 case 0x3d: /* X Tilt */
708                         map_abs_clear(ABS_TILT_X);
709                         break;
710 
711                 case 0x3e: /* Y Tilt */
712                         map_abs_clear(ABS_TILT_Y);
713                         break;
714 
715                 case 0x33: /* Touch */
716                 case 0x42: /* TipSwitch */
717                 case 0x43: /* TipSwitch2 */
718                         device->quirks &= ~HID_QUIRK_NOTOUCH;
719                         map_key_clear(BTN_TOUCH);
720                         break;
721 
722                 case 0x44: /* BarrelSwitch */
723                         map_key_clear(BTN_STYLUS);
724                         break;
725 
726                 case 0x46: /* TabletPick */
727                 case 0x5a: /* SecondaryBarrelSwitch */
728                         map_key_clear(BTN_STYLUS2);
729                         break;
730 
731                 case 0x5b: /* TransducerSerialNumber */
732                         usage->type = EV_MSC;
733                         usage->code = MSC_SERIAL;
734                         bit = input->mscbit;
735                         max = MSC_MAX;
736                         break;
737 
738                 default:  goto unknown;
739                 }
740                 break;
741 
742         case HID_UP_TELEPHONY:
743                 switch (usage->hid & HID_USAGE) {
744                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
745                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
746                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
747                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
748                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
749                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
750                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
751                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
752                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
753                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
754                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
755                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
756                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
757                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
758                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
759                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
760                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
761                 default: goto ignore;
762                 }
763                 break;
764 
765         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
766                 switch (usage->hid & HID_USAGE) {
767                 case 0x000: goto ignore;
768                 case 0x030: map_key_clear(KEY_POWER);           break;
769                 case 0x031: map_key_clear(KEY_RESTART);         break;
770                 case 0x032: map_key_clear(KEY_SLEEP);           break;
771                 case 0x034: map_key_clear(KEY_SLEEP);           break;
772                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
773                 case 0x036: map_key_clear(BTN_MISC);            break;
774 
775                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
776                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
777                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
778                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
779                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
780                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
781                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
782                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
783                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
784 
785                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
786                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
787                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
788                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
789                 case 0x069: map_key_clear(KEY_RED);             break;
790                 case 0x06a: map_key_clear(KEY_GREEN);           break;
791                 case 0x06b: map_key_clear(KEY_BLUE);            break;
792                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
793                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
794 
795                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
796                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
797                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
798                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
799                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
800                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
801 
802                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
803                 case 0x083: map_key_clear(KEY_LAST);            break;
804                 case 0x084: map_key_clear(KEY_ENTER);           break;
805                 case 0x088: map_key_clear(KEY_PC);              break;
806                 case 0x089: map_key_clear(KEY_TV);              break;
807                 case 0x08a: map_key_clear(KEY_WWW);             break;
808                 case 0x08b: map_key_clear(KEY_DVD);             break;
809                 case 0x08c: map_key_clear(KEY_PHONE);           break;
810                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
811                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
812                 case 0x08f: map_key_clear(KEY_GAMES);           break;
813                 case 0x090: map_key_clear(KEY_MEMO);            break;
814                 case 0x091: map_key_clear(KEY_CD);              break;
815                 case 0x092: map_key_clear(KEY_VCR);             break;
816                 case 0x093: map_key_clear(KEY_TUNER);           break;
817                 case 0x094: map_key_clear(KEY_EXIT);            break;
818                 case 0x095: map_key_clear(KEY_HELP);            break;
819                 case 0x096: map_key_clear(KEY_TAPE);            break;
820                 case 0x097: map_key_clear(KEY_TV2);             break;
821                 case 0x098: map_key_clear(KEY_SAT);             break;
822                 case 0x09a: map_key_clear(KEY_PVR);             break;
823 
824                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
825                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
826                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
827 
828                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
829                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
830                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
831                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
832                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
833                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
834                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
835                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
836                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
837                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
838                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
839                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
840 
841                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
842                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
843                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
844                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
845                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
846                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
847                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
848                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
849 
850                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
851                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
852                 case 0x183: map_key_clear(KEY_CONFIG);          break;
853                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
854                 case 0x185: map_key_clear(KEY_EDITOR);          break;
855                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
856                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
857                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
858                 case 0x189: map_key_clear(KEY_DATABASE);        break;
859                 case 0x18a: map_key_clear(KEY_MAIL);            break;
860                 case 0x18b: map_key_clear(KEY_NEWS);            break;
861                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
862                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
863                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
864                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
865                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
866                 case 0x191: map_key_clear(KEY_FINANCE);         break;
867                 case 0x192: map_key_clear(KEY_CALC);            break;
868                 case 0x193: map_key_clear(KEY_PLAYER);          break;
869                 case 0x194: map_key_clear(KEY_FILE);            break;
870                 case 0x196: map_key_clear(KEY_WWW);             break;
871                 case 0x199: map_key_clear(KEY_CHAT);            break;
872                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
873                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
874                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
875                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
876                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
877                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
878                 case 0x1a6: map_key_clear(KEY_HELP);            break;
879                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
880                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
881                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
882                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
883                 case 0x1b4: map_key_clear(KEY_FILE);            break;
884                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
885                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
886                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
887                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
888                 case 0x1bd: map_key_clear(KEY_INFO);            break;
889                 case 0x201: map_key_clear(KEY_NEW);             break;
890                 case 0x202: map_key_clear(KEY_OPEN);            break;
891                 case 0x203: map_key_clear(KEY_CLOSE);           break;
892                 case 0x204: map_key_clear(KEY_EXIT);            break;
893                 case 0x207: map_key_clear(KEY_SAVE);            break;
894                 case 0x208: map_key_clear(KEY_PRINT);           break;
895                 case 0x209: map_key_clear(KEY_PROPS);           break;
896                 case 0x21a: map_key_clear(KEY_UNDO);            break;
897                 case 0x21b: map_key_clear(KEY_COPY);            break;
898                 case 0x21c: map_key_clear(KEY_CUT);             break;
899                 case 0x21d: map_key_clear(KEY_PASTE);           break;
900                 case 0x21f: map_key_clear(KEY_FIND);            break;
901                 case 0x221: map_key_clear(KEY_SEARCH);          break;
902                 case 0x222: map_key_clear(KEY_GOTO);            break;
903                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
904                 case 0x224: map_key_clear(KEY_BACK);            break;
905                 case 0x225: map_key_clear(KEY_FORWARD);         break;
906                 case 0x226: map_key_clear(KEY_STOP);            break;
907                 case 0x227: map_key_clear(KEY_REFRESH);         break;
908                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
909                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
910                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
911                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
912                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
913                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
914                 case 0x238: map_rel(REL_HWHEEL);                break;
915                 case 0x23d: map_key_clear(KEY_EDIT);            break;
916                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
917                 case 0x269: map_key_clear(KEY_INSERT);          break;
918                 case 0x26a: map_key_clear(KEY_DELETE);          break;
919                 case 0x279: map_key_clear(KEY_REDO);            break;
920 
921                 case 0x289: map_key_clear(KEY_REPLY);           break;
922                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
923                 case 0x28c: map_key_clear(KEY_SEND);            break;
924 
925                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
926                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
927                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
928                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
929                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
930                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
931 
932                 default: map_key_clear(KEY_UNKNOWN);
933                 }
934                 break;
935 
936         case HID_UP_GENDEVCTRLS:
937                 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
938                         goto ignore;
939                 else
940                         goto unknown;
941                 break;
942 
943         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
944                 set_bit(EV_REP, input->evbit);
945                 switch (usage->hid & HID_USAGE) {
946                 case 0x021: map_key_clear(KEY_PRINT);           break;
947                 case 0x070: map_key_clear(KEY_HP);              break;
948                 case 0x071: map_key_clear(KEY_CAMERA);          break;
949                 case 0x072: map_key_clear(KEY_SOUND);           break;
950                 case 0x073: map_key_clear(KEY_QUESTION);        break;
951                 case 0x080: map_key_clear(KEY_EMAIL);           break;
952                 case 0x081: map_key_clear(KEY_CHAT);            break;
953                 case 0x082: map_key_clear(KEY_SEARCH);          break;
954                 case 0x083: map_key_clear(KEY_CONNECT);         break;
955                 case 0x084: map_key_clear(KEY_FINANCE);         break;
956                 case 0x085: map_key_clear(KEY_SPORT);           break;
957                 case 0x086: map_key_clear(KEY_SHOP);            break;
958                 default:    goto ignore;
959                 }
960                 break;
961 
962         case HID_UP_HPVENDOR2:
963                 set_bit(EV_REP, input->evbit);
964                 switch (usage->hid & HID_USAGE) {
965                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
966                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
967                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
968                 default:    goto ignore;
969                 }
970                 break;
971 
972         case HID_UP_MSVENDOR:
973                 goto ignore;
974 
975         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
976                 set_bit(EV_REP, input->evbit);
977                 goto ignore;
978 
979         case HID_UP_LOGIVENDOR:
980                 /* intentional fallback */
981         case HID_UP_LOGIVENDOR2:
982                 /* intentional fallback */
983         case HID_UP_LOGIVENDOR3:
984                 goto ignore;
985 
986         case HID_UP_PID:
987                 switch (usage->hid & HID_USAGE) {
988                 case 0xa4: map_key_clear(BTN_DEAD);     break;
989                 default: goto ignore;
990                 }
991                 break;
992 
993         default:
994         unknown:
995                 if (field->report_size == 1) {
996                         if (field->report->type == HID_OUTPUT_REPORT) {
997                                 map_led(LED_MISC);
998                                 break;
999                         }
1000                         map_key(BTN_MISC);
1001                         break;
1002                 }
1003                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1004                         map_rel(REL_MISC);
1005                         break;
1006                 }
1007                 map_abs(ABS_MISC);
1008                 break;
1009         }
1010 
1011 mapped:
1012         if (device->driver->input_mapped && device->driver->input_mapped(device,
1013                                 hidinput, field, usage, &bit, &max) < 0)
1014                 goto ignore;
1015 
1016         set_bit(usage->type, input->evbit);
1017 
1018         while (usage->code <= max && test_and_set_bit(usage->code, bit))
1019                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
1020 
1021         if (usage->code > max)
1022                 goto ignore;
1023 
1024 
1025         if (usage->type == EV_ABS) {
1026 
1027                 int a = field->logical_minimum;
1028                 int b = field->logical_maximum;
1029 
1030                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1031                         a = field->logical_minimum = 0;
1032                         b = field->logical_maximum = 255;
1033                 }
1034 
1035                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1036                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1037                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1038 
1039                 input_abs_set_res(input, usage->code,
1040                                   hidinput_calc_abs_res(field, usage->code));
1041 
1042                 /* use a larger default input buffer for MT devices */
1043                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1044                         input_set_events_per_packet(input, 60);
1045         }
1046 
1047         if (usage->type == EV_ABS &&
1048             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1049                 int i;
1050                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1051                         input_set_abs_params(input, i, -1, 1, 0, 0);
1052                         set_bit(i, input->absbit);
1053                 }
1054                 if (usage->hat_dir && !field->dpad)
1055                         field->dpad = usage->code;
1056         }
1057 
1058         /* for those devices which produce Consumer volume usage as relative,
1059          * we emulate pressing volumeup/volumedown appropriate number of times
1060          * in hidinput_hid_event()
1061          */
1062         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1063                         (usage->code == ABS_VOLUME)) {
1064                 set_bit(KEY_VOLUMEUP, input->keybit);
1065                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1066         }
1067 
1068         if (usage->type == EV_KEY) {
1069                 set_bit(EV_MSC, input->evbit);
1070                 set_bit(MSC_SCAN, input->mscbit);
1071         }
1072 
1073 ignore:
1074         return;
1075 
1076 }
1077 
1078 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1079 {
1080         struct input_dev *input;
1081         unsigned *quirks = &hid->quirks;
1082 
1083         if (!field->hidinput)
1084                 return;
1085 
1086         input = field->hidinput->input;
1087 
1088         if (!usage->type)
1089                 return;
1090 
1091         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1092                 int hat_dir = usage->hat_dir;
1093                 if (!hat_dir)
1094                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1095                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1096                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1097                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1098                 return;
1099         }
1100 
1101         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1102                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1103                 return;
1104         }
1105 
1106         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1107                 if (value) {
1108                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1109                         return;
1110                 }
1111                 input_event(input, usage->type, usage->code, 0);
1112                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1113                 return;
1114         }
1115 
1116         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1117                 int a = field->logical_minimum;
1118                 int b = field->logical_maximum;
1119                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1120         }
1121 
1122         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1123                 dbg_hid("Maximum Effects - %d\n",value);
1124                 return;
1125         }
1126 
1127         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1128                 dbg_hid("PID Pool Report\n");
1129                 return;
1130         }
1131 
1132         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1133                 return;
1134 
1135         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1136                         (usage->code == ABS_VOLUME)) {
1137                 int count = abs(value);
1138                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1139                 int i;
1140 
1141                 for (i = 0; i < count; i++) {
1142                         input_event(input, EV_KEY, direction, 1);
1143                         input_sync(input);
1144                         input_event(input, EV_KEY, direction, 0);
1145                         input_sync(input);
1146                 }
1147                 return;
1148         }
1149 
1150         /*
1151          * Ignore out-of-range values as per HID specification,
1152          * section 5.10 and 6.2.25.
1153          *
1154          * The logical_minimum < logical_maximum check is done so that we
1155          * don't unintentionally discard values sent by devices which
1156          * don't specify logical min and max.
1157          */
1158         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1159             (field->logical_minimum < field->logical_maximum) &&
1160             (value < field->logical_minimum ||
1161              value > field->logical_maximum)) {
1162                 dbg_hid("Ignoring out-of-range value %x\n", value);
1163                 return;
1164         }
1165 
1166         /*
1167          * Ignore reports for absolute data if the data didn't change. This is
1168          * not only an optimization but also fixes 'dead' key reports. Some
1169          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1170          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1171          * can only have one of them physically available. The 'dead' keys
1172          * report constant 0. As all map to the same keycode, they'd confuse
1173          * the input layer. If we filter the 'dead' keys on the HID level, we
1174          * skip the keycode translation and only forward real events.
1175          */
1176         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1177                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1178                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1179             usage->usage_index < field->maxusage &&
1180             value == field->value[usage->usage_index])
1181                 return;
1182 
1183         /* report the usage code as scancode if the key status has changed */
1184         if (usage->type == EV_KEY &&
1185             (!test_bit(usage->code, input->key)) == value)
1186                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1187 
1188         input_event(input, usage->type, usage->code, value);
1189 
1190         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1191             usage->type == EV_KEY && value) {
1192                 input_sync(input);
1193                 input_event(input, usage->type, usage->code, 0);
1194         }
1195 }
1196 
1197 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1198 {
1199         struct hid_input *hidinput;
1200 
1201         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1202                 return;
1203 
1204         list_for_each_entry(hidinput, &hid->inputs, list)
1205                 input_sync(hidinput->input);
1206 }
1207 EXPORT_SYMBOL_GPL(hidinput_report_event);
1208 
1209 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1210 {
1211         struct hid_report *report;
1212         int i, j;
1213 
1214         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1215                 for (i = 0; i < report->maxfield; i++) {
1216                         *field = report->field[i];
1217                         for (j = 0; j < (*field)->maxusage; j++)
1218                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1219                                         return j;
1220                 }
1221         }
1222         return -1;
1223 }
1224 EXPORT_SYMBOL_GPL(hidinput_find_field);
1225 
1226 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1227 {
1228         struct hid_report *report;
1229         struct hid_field *field;
1230         int i, j;
1231 
1232         list_for_each_entry(report,
1233                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1234                             list) {
1235                 for (i = 0; i < report->maxfield; i++) {
1236                         field = report->field[i];
1237                         for (j = 0; j < field->maxusage; j++)
1238                                 if (field->usage[j].type == EV_LED)
1239                                         return field;
1240                 }
1241         }
1242         return NULL;
1243 }
1244 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1245 
1246 unsigned int hidinput_count_leds(struct hid_device *hid)
1247 {
1248         struct hid_report *report;
1249         struct hid_field *field;
1250         int i, j;
1251         unsigned int count = 0;
1252 
1253         list_for_each_entry(report,
1254                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1255                             list) {
1256                 for (i = 0; i < report->maxfield; i++) {
1257                         field = report->field[i];
1258                         for (j = 0; j < field->maxusage; j++)
1259                                 if (field->usage[j].type == EV_LED &&
1260                                     field->value[j])
1261                                         count += 1;
1262                 }
1263         }
1264         return count;
1265 }
1266 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1267 
1268 static void hidinput_led_worker(struct work_struct *work)
1269 {
1270         struct hid_device *hid = container_of(work, struct hid_device,
1271                                               led_work);
1272         struct hid_field *field;
1273         struct hid_report *report;
1274         int len, ret;
1275         __u8 *buf;
1276 
1277         field = hidinput_get_led_field(hid);
1278         if (!field)
1279                 return;
1280 
1281         /*
1282          * field->report is accessed unlocked regarding HID core. So there might
1283          * be another incoming SET-LED request from user-space, which changes
1284          * the LED state while we assemble our outgoing buffer. However, this
1285          * doesn't matter as hid_output_report() correctly converts it into a
1286          * boolean value no matter what information is currently set on the LED
1287          * field (even garbage). So the remote device will always get a valid
1288          * request.
1289          * And in case we send a wrong value, a next led worker is spawned
1290          * for every SET-LED request so the following worker will send the
1291          * correct value, guaranteed!
1292          */
1293 
1294         report = field->report;
1295 
1296         /* use custom SET_REPORT request if possible (asynchronous) */
1297         if (hid->ll_driver->request)
1298                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1299 
1300         /* fall back to generic raw-output-report */
1301         len = hid_report_len(report);
1302         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1303         if (!buf)
1304                 return;
1305 
1306         hid_output_report(report, buf);
1307         /* synchronous output report */
1308         ret = hid_hw_output_report(hid, buf, len);
1309         if (ret == -ENOSYS)
1310                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1311                                 HID_REQ_SET_REPORT);
1312         kfree(buf);
1313 }
1314 
1315 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1316                                 unsigned int code, int value)
1317 {
1318         struct hid_device *hid = input_get_drvdata(dev);
1319         struct hid_field *field;
1320         int offset;
1321 
1322         if (type == EV_FF)
1323                 return input_ff_event(dev, type, code, value);
1324 
1325         if (type != EV_LED)
1326                 return -1;
1327 
1328         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1329                 hid_warn(dev, "event field not found\n");
1330                 return -1;
1331         }
1332 
1333         hid_set_field(field, offset, value);
1334 
1335         schedule_work(&hid->led_work);
1336         return 0;
1337 }
1338 
1339 static int hidinput_open(struct input_dev *dev)
1340 {
1341         struct hid_device *hid = input_get_drvdata(dev);
1342 
1343         return hid_hw_open(hid);
1344 }
1345 
1346 static void hidinput_close(struct input_dev *dev)
1347 {
1348         struct hid_device *hid = input_get_drvdata(dev);
1349 
1350         hid_hw_close(hid);
1351 }
1352 
1353 static void report_features(struct hid_device *hid)
1354 {
1355         struct hid_driver *drv = hid->driver;
1356         struct hid_report_enum *rep_enum;
1357         struct hid_report *rep;
1358         int i, j;
1359 
1360         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1361         list_for_each_entry(rep, &rep_enum->report_list, list)
1362                 for (i = 0; i < rep->maxfield; i++) {
1363                         /* Ignore if report count is out of bounds. */
1364                         if (rep->field[i]->report_count < 1)
1365                                 continue;
1366 
1367                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1368                                 /* Verify if Battery Strength feature is available */
1369                                 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1370 
1371                                 if (drv->feature_mapping)
1372                                         drv->feature_mapping(hid, rep->field[i],
1373                                                              rep->field[i]->usage + j);
1374                         }
1375                 }
1376 }
1377 
1378 static struct hid_input *hidinput_allocate(struct hid_device *hid)
1379 {
1380         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1381         struct input_dev *input_dev = input_allocate_device();
1382         if (!hidinput || !input_dev) {
1383                 kfree(hidinput);
1384                 input_free_device(input_dev);
1385                 hid_err(hid, "Out of memory during hid input probe\n");
1386                 return NULL;
1387         }
1388 
1389         input_set_drvdata(input_dev, hid);
1390         input_dev->event = hidinput_input_event;
1391         input_dev->open = hidinput_open;
1392         input_dev->close = hidinput_close;
1393         input_dev->setkeycode = hidinput_setkeycode;
1394         input_dev->getkeycode = hidinput_getkeycode;
1395 
1396         input_dev->name = hid->name;
1397         input_dev->phys = hid->phys;
1398         input_dev->uniq = hid->uniq;
1399         input_dev->id.bustype = hid->bus;
1400         input_dev->id.vendor  = hid->vendor;
1401         input_dev->id.product = hid->product;
1402         input_dev->id.version = hid->version;
1403         input_dev->dev.parent = &hid->dev;
1404         hidinput->input = input_dev;
1405         list_add_tail(&hidinput->list, &hid->inputs);
1406 
1407         return hidinput;
1408 }
1409 
1410 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1411 {
1412         int i;
1413         unsigned long r = 0;
1414 
1415         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1416                 r |= hidinput->input->evbit[i];
1417 
1418         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1419                 r |= hidinput->input->keybit[i];
1420 
1421         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1422                 r |= hidinput->input->relbit[i];
1423 
1424         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1425                 r |= hidinput->input->absbit[i];
1426 
1427         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1428                 r |= hidinput->input->mscbit[i];
1429 
1430         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1431                 r |= hidinput->input->ledbit[i];
1432 
1433         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1434                 r |= hidinput->input->sndbit[i];
1435 
1436         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1437                 r |= hidinput->input->ffbit[i];
1438 
1439         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1440                 r |= hidinput->input->swbit[i];
1441 
1442         return !!r;
1443 }
1444 
1445 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1446                 struct hid_input *hidinput)
1447 {
1448         struct hid_report *report;
1449         int i, k;
1450 
1451         list_del(&hidinput->list);
1452         input_free_device(hidinput->input);
1453 
1454         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1455                 if (k == HID_OUTPUT_REPORT &&
1456                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1457                         continue;
1458 
1459                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1460                                     list) {
1461 
1462                         for (i = 0; i < report->maxfield; i++)
1463                                 if (report->field[i]->hidinput == hidinput)
1464                                         report->field[i]->hidinput = NULL;
1465                 }
1466         }
1467 
1468         kfree(hidinput);
1469 }
1470 
1471 /*
1472  * Register the input device; print a message.
1473  * Configure the input layer interface
1474  * Read all reports and initialize the absolute field values.
1475  */
1476 
1477 int hidinput_connect(struct hid_device *hid, unsigned int force)
1478 {
1479         struct hid_driver *drv = hid->driver;
1480         struct hid_report *report;
1481         struct hid_input *hidinput = NULL;
1482         int i, j, k;
1483 
1484         INIT_LIST_HEAD(&hid->inputs);
1485         INIT_WORK(&hid->led_work, hidinput_led_worker);
1486 
1487         if (!force) {
1488                 for (i = 0; i < hid->maxcollection; i++) {
1489                         struct hid_collection *col = &hid->collection[i];
1490                         if (col->type == HID_COLLECTION_APPLICATION ||
1491                                         col->type == HID_COLLECTION_PHYSICAL)
1492                                 if (IS_INPUT_APPLICATION(col->usage))
1493                                         break;
1494                 }
1495 
1496                 if (i == hid->maxcollection)
1497                         return -1;
1498         }
1499 
1500         report_features(hid);
1501 
1502         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1503                 if (k == HID_OUTPUT_REPORT &&
1504                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1505                         continue;
1506 
1507                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1508 
1509                         if (!report->maxfield)
1510                                 continue;
1511 
1512                         if (!hidinput) {
1513                                 hidinput = hidinput_allocate(hid);
1514                                 if (!hidinput)
1515                                         goto out_unwind;
1516                         }
1517 
1518                         for (i = 0; i < report->maxfield; i++)
1519                                 for (j = 0; j < report->field[i]->maxusage; j++)
1520                                         hidinput_configure_usage(hidinput, report->field[i],
1521                                                                  report->field[i]->usage + j);
1522 
1523                         if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1524                             !hidinput_has_been_populated(hidinput))
1525                                 continue;
1526 
1527                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1528                                 /* This will leave hidinput NULL, so that it
1529                                  * allocates another one if we have more inputs on
1530                                  * the same interface. Some devices (e.g. Happ's
1531                                  * UGCI) cram a lot of unrelated inputs into the
1532                                  * same interface. */
1533                                 hidinput->report = report;
1534                                 if (drv->input_configured &&
1535                                     drv->input_configured(hid, hidinput))
1536                                         goto out_cleanup;
1537                                 if (input_register_device(hidinput->input))
1538                                         goto out_cleanup;
1539                                 hidinput = NULL;
1540                         }
1541                 }
1542         }
1543 
1544         if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1545             !hidinput_has_been_populated(hidinput)) {
1546                 /* no need to register an input device not populated */
1547                 hidinput_cleanup_hidinput(hid, hidinput);
1548                 hidinput = NULL;
1549         }
1550 
1551         if (list_empty(&hid->inputs)) {
1552                 hid_err(hid, "No inputs registered, leaving\n");
1553                 goto out_unwind;
1554         }
1555 
1556         if (hidinput) {
1557                 if (drv->input_configured &&
1558                     drv->input_configured(hid, hidinput))
1559                         goto out_cleanup;
1560                 if (input_register_device(hidinput->input))
1561                         goto out_cleanup;
1562         }
1563 
1564         return 0;
1565 
1566 out_cleanup:
1567         list_del(&hidinput->list);
1568         input_free_device(hidinput->input);
1569         kfree(hidinput);
1570 out_unwind:
1571         /* unwind the ones we already registered */
1572         hidinput_disconnect(hid);
1573 
1574         return -1;
1575 }
1576 EXPORT_SYMBOL_GPL(hidinput_connect);
1577 
1578 void hidinput_disconnect(struct hid_device *hid)
1579 {
1580         struct hid_input *hidinput, *next;
1581 
1582         hidinput_cleanup_battery(hid);
1583 
1584         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1585                 list_del(&hidinput->list);
1586                 input_unregister_device(hidinput->input);
1587                 kfree(hidinput);
1588         }
1589 
1590         /* led_work is spawned by input_dev callbacks, but doesn't access the
1591          * parent input_dev at all. Once all input devices are removed, we
1592          * know that led_work will never get restarted, so we can cancel it
1593          * synchronously and are safe. */
1594         cancel_work_sync(&hid->led_work);
1595 }
1596 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1597 
1598 

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