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