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
match_scancode(struct hid_usage * usage,unsigned int cur_idx,unsigned int scancode)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
match_keycode(struct hid_usage * usage,unsigned int cur_idx,unsigned int keycode)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
match_index(struct hid_usage * usage,unsigned int cur_idx,unsigned int idx)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
hidinput_find_key(struct hid_device * hid,hid_usage_cmp_t match,unsigned int value,unsigned int * usage_idx)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
hidinput_locate_usage(struct hid_device * hid,const struct input_keymap_entry * ke,unsigned int * index)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
hidinput_getkeycode(struct input_dev * dev,struct input_keymap_entry * ke)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
hidinput_setkeycode(struct input_dev * dev,const struct input_keymap_entry * ke,unsigned int * old_keycode)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 */
hidinput_calc_abs_res(const struct hid_field * field,__u16 code)211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
212 {
213 __s32 unit_exponent = field->unit_exponent;
214 __s32 logical_extents = field->logical_maximum -
215 field->logical_minimum;
216 __s32 physical_extents = field->physical_maximum -
217 field->physical_minimum;
218 __s32 prev;
219
220 /* Check if the extents are sane */
221 if (logical_extents <= 0 || physical_extents <= 0)
222 return 0;
223
224 /*
225 * Verify and convert units.
226 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
227 */
228 switch (code) {
229 case ABS_X:
230 case ABS_Y:
231 case ABS_Z:
232 case ABS_MT_POSITION_X:
233 case ABS_MT_POSITION_Y:
234 case ABS_MT_TOOL_X:
235 case ABS_MT_TOOL_Y:
236 case ABS_MT_TOUCH_MAJOR:
237 case ABS_MT_TOUCH_MINOR:
238 if (field->unit == 0x11) { /* If centimeters */
239 /* Convert to millimeters */
240 unit_exponent += 1;
241 } else if (field->unit == 0x13) { /* If inches */
242 /* Convert to millimeters */
243 prev = physical_extents;
244 physical_extents *= 254;
245 if (physical_extents < prev)
246 return 0;
247 unit_exponent -= 1;
248 } else {
249 return 0;
250 }
251 break;
252
253 case ABS_RX:
254 case ABS_RY:
255 case ABS_RZ:
256 case ABS_WHEEL:
257 case ABS_TILT_X:
258 case ABS_TILT_Y:
259 if (field->unit == 0x14) { /* If degrees */
260 /* Convert to radians */
261 prev = logical_extents;
262 logical_extents *= 573;
263 if (logical_extents < prev)
264 return 0;
265 unit_exponent += 1;
266 } else if (field->unit != 0x12) { /* If not radians */
267 return 0;
268 }
269 break;
270
271 default:
272 return 0;
273 }
274
275 /* Apply negative unit exponent */
276 for (; unit_exponent < 0; unit_exponent++) {
277 prev = logical_extents;
278 logical_extents *= 10;
279 if (logical_extents < prev)
280 return 0;
281 }
282 /* Apply positive unit exponent */
283 for (; unit_exponent > 0; unit_exponent--) {
284 prev = physical_extents;
285 physical_extents *= 10;
286 if (physical_extents < prev)
287 return 0;
288 }
289
290 /* Calculate resolution */
291 return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
292 }
293 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
294
295 #ifdef CONFIG_HID_BATTERY_STRENGTH
296 static enum power_supply_property hidinput_battery_props[] = {
297 POWER_SUPPLY_PROP_PRESENT,
298 POWER_SUPPLY_PROP_ONLINE,
299 POWER_SUPPLY_PROP_CAPACITY,
300 POWER_SUPPLY_PROP_MODEL_NAME,
301 POWER_SUPPLY_PROP_STATUS,
302 POWER_SUPPLY_PROP_SCOPE,
303 };
304
305 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
306 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
307 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
308
309 static const struct hid_device_id hid_battery_quirks[] = {
310 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
311 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
312 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
313 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
314 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
315 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
316 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
317 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
318 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
319 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
320 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
321 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
322 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
323 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
324 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
325 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
326 USB_DEVICE_ID_ELECOM_BM084),
327 HID_BATTERY_QUIRK_IGNORE },
328 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
329 USB_DEVICE_ID_SYMBOL_SCANNER_3),
330 HID_BATTERY_QUIRK_IGNORE },
331 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
332 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
333 HID_BATTERY_QUIRK_IGNORE },
334 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
335 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
336 HID_BATTERY_QUIRK_IGNORE },
337 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
338 HID_BATTERY_QUIRK_IGNORE },
339 {}
340 };
341
find_battery_quirk(struct hid_device * hdev)342 static unsigned find_battery_quirk(struct hid_device *hdev)
343 {
344 unsigned quirks = 0;
345 const struct hid_device_id *match;
346
347 match = hid_match_id(hdev, hid_battery_quirks);
348 if (match != NULL)
349 quirks = match->driver_data;
350
351 return quirks;
352 }
353
hidinput_scale_battery_capacity(struct hid_device * dev,int value)354 static int hidinput_scale_battery_capacity(struct hid_device *dev,
355 int value)
356 {
357 if (dev->battery_min < dev->battery_max &&
358 value >= dev->battery_min && value <= dev->battery_max)
359 value = ((value - dev->battery_min) * 100) /
360 (dev->battery_max - dev->battery_min);
361
362 return value;
363 }
364
hidinput_query_battery_capacity(struct hid_device * dev)365 static int hidinput_query_battery_capacity(struct hid_device *dev)
366 {
367 u8 *buf;
368 int ret;
369
370 buf = kmalloc(4, GFP_KERNEL);
371 if (!buf)
372 return -ENOMEM;
373
374 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
375 dev->battery_report_type, HID_REQ_GET_REPORT);
376 if (ret < 2) {
377 kfree(buf);
378 return -ENODATA;
379 }
380
381 ret = hidinput_scale_battery_capacity(dev, buf[1]);
382 kfree(buf);
383 return ret;
384 }
385
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)386 static int hidinput_get_battery_property(struct power_supply *psy,
387 enum power_supply_property prop,
388 union power_supply_propval *val)
389 {
390 struct hid_device *dev = power_supply_get_drvdata(psy);
391 int value;
392 int ret = 0;
393
394 switch (prop) {
395 case POWER_SUPPLY_PROP_PRESENT:
396 case POWER_SUPPLY_PROP_ONLINE:
397 val->intval = 1;
398 break;
399
400 case POWER_SUPPLY_PROP_CAPACITY:
401 if (dev->battery_status != HID_BATTERY_REPORTED &&
402 !dev->battery_avoid_query) {
403 value = hidinput_query_battery_capacity(dev);
404 if (value < 0)
405 return value;
406 } else {
407 value = dev->battery_capacity;
408 }
409
410 val->intval = value;
411 break;
412
413 case POWER_SUPPLY_PROP_MODEL_NAME:
414 val->strval = dev->name;
415 break;
416
417 case POWER_SUPPLY_PROP_STATUS:
418 if (dev->battery_status != HID_BATTERY_REPORTED &&
419 !dev->battery_avoid_query) {
420 value = hidinput_query_battery_capacity(dev);
421 if (value < 0)
422 return value;
423
424 dev->battery_capacity = value;
425 dev->battery_status = HID_BATTERY_QUERIED;
426 }
427
428 if (dev->battery_status == HID_BATTERY_UNKNOWN)
429 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
430 else
431 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
432 break;
433
434 case POWER_SUPPLY_PROP_SCOPE:
435 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
436 break;
437
438 default:
439 ret = -EINVAL;
440 break;
441 }
442
443 return ret;
444 }
445
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field)446 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
447 {
448 struct power_supply_desc *psy_desc;
449 struct power_supply_config psy_cfg = { .drv_data = dev, };
450 unsigned quirks;
451 s32 min, max;
452 int error;
453
454 if (dev->battery)
455 return 0; /* already initialized? */
456
457 quirks = find_battery_quirk(dev);
458
459 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
460 dev->bus, dev->vendor, dev->product, dev->version, quirks);
461
462 if (quirks & HID_BATTERY_QUIRK_IGNORE)
463 return 0;
464
465 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
466 if (!psy_desc)
467 return -ENOMEM;
468
469 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
470 strlen(dev->uniq) ?
471 dev->uniq : dev_name(&dev->dev));
472 if (!psy_desc->name) {
473 error = -ENOMEM;
474 goto err_free_mem;
475 }
476
477 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
478 psy_desc->properties = hidinput_battery_props;
479 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
480 psy_desc->use_for_apm = 0;
481 psy_desc->get_property = hidinput_get_battery_property;
482
483 min = field->logical_minimum;
484 max = field->logical_maximum;
485
486 if (quirks & HID_BATTERY_QUIRK_PERCENT) {
487 min = 0;
488 max = 100;
489 }
490
491 if (quirks & HID_BATTERY_QUIRK_FEATURE)
492 report_type = HID_FEATURE_REPORT;
493
494 dev->battery_min = min;
495 dev->battery_max = max;
496 dev->battery_report_type = report_type;
497 dev->battery_report_id = field->report->id;
498
499 /*
500 * Stylus is normally not connected to the device and thus we
501 * can't query the device and get meaningful battery strength.
502 * We have to wait for the device to report it on its own.
503 */
504 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
505 field->physical == HID_DG_STYLUS;
506
507 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
508 if (IS_ERR(dev->battery)) {
509 error = PTR_ERR(dev->battery);
510 hid_warn(dev, "can't register power supply: %d\n", error);
511 goto err_free_name;
512 }
513
514 power_supply_powers(dev->battery, &dev->dev);
515 return 0;
516
517 err_free_name:
518 kfree(psy_desc->name);
519 err_free_mem:
520 kfree(psy_desc);
521 dev->battery = NULL;
522 return error;
523 }
524
hidinput_cleanup_battery(struct hid_device * dev)525 static void hidinput_cleanup_battery(struct hid_device *dev)
526 {
527 const struct power_supply_desc *psy_desc;
528
529 if (!dev->battery)
530 return;
531
532 psy_desc = dev->battery->desc;
533 power_supply_unregister(dev->battery);
534 kfree(psy_desc->name);
535 kfree(psy_desc);
536 dev->battery = NULL;
537 }
538
hidinput_update_battery(struct hid_device * dev,int value)539 static void hidinput_update_battery(struct hid_device *dev, int value)
540 {
541 int capacity;
542
543 if (!dev->battery)
544 return;
545
546 if (value == 0 || value < dev->battery_min || value > dev->battery_max)
547 return;
548
549 capacity = hidinput_scale_battery_capacity(dev, value);
550
551 if (dev->battery_status != HID_BATTERY_REPORTED ||
552 capacity != dev->battery_capacity) {
553 dev->battery_capacity = capacity;
554 dev->battery_status = HID_BATTERY_REPORTED;
555 power_supply_changed(dev->battery);
556 }
557 }
558 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field)559 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
560 struct hid_field *field)
561 {
562 return 0;
563 }
564
hidinput_cleanup_battery(struct hid_device * dev)565 static void hidinput_cleanup_battery(struct hid_device *dev)
566 {
567 }
568
hidinput_update_battery(struct hid_device * dev,int value)569 static void hidinput_update_battery(struct hid_device *dev, int value)
570 {
571 }
572 #endif /* CONFIG_HID_BATTERY_STRENGTH */
573
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage)574 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
575 struct hid_usage *usage)
576 {
577 struct input_dev *input = hidinput->input;
578 struct hid_device *device = input_get_drvdata(input);
579 int max = 0, code;
580 unsigned long *bit = NULL;
581
582 field->hidinput = hidinput;
583
584 if (field->flags & HID_MAIN_ITEM_CONSTANT)
585 goto ignore;
586
587 /* Ignore if report count is out of bounds. */
588 if (field->report_count < 1)
589 goto ignore;
590
591 /* only LED usages are supported in output fields */
592 if (field->report_type == HID_OUTPUT_REPORT &&
593 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
594 goto ignore;
595 }
596
597 if (device->driver->input_mapping) {
598 int ret = device->driver->input_mapping(device, hidinput, field,
599 usage, &bit, &max);
600 if (ret > 0)
601 goto mapped;
602 if (ret < 0)
603 goto ignore;
604 }
605
606 switch (usage->hid & HID_USAGE_PAGE) {
607 case HID_UP_UNDEFINED:
608 goto ignore;
609
610 case HID_UP_KEYBOARD:
611 set_bit(EV_REP, input->evbit);
612
613 if ((usage->hid & HID_USAGE) < 256) {
614 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
615 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
616 } else
617 map_key(KEY_UNKNOWN);
618
619 break;
620
621 case HID_UP_BUTTON:
622 code = ((usage->hid - 1) & HID_USAGE);
623
624 switch (field->application) {
625 case HID_GD_MOUSE:
626 case HID_GD_POINTER: code += BTN_MOUSE; break;
627 case HID_GD_JOYSTICK:
628 if (code <= 0xf)
629 code += BTN_JOYSTICK;
630 else
631 code += BTN_TRIGGER_HAPPY - 0x10;
632 break;
633 case HID_GD_GAMEPAD:
634 if (code <= 0xf)
635 code += BTN_GAMEPAD;
636 else
637 code += BTN_TRIGGER_HAPPY - 0x10;
638 break;
639 default:
640 switch (field->physical) {
641 case HID_GD_MOUSE:
642 case HID_GD_POINTER: code += BTN_MOUSE; break;
643 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
644 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
645 default: code += BTN_MISC;
646 }
647 }
648
649 map_key(code);
650 break;
651
652 case HID_UP_SIMULATION:
653 switch (usage->hid & 0xffff) {
654 case 0xba: map_abs(ABS_RUDDER); break;
655 case 0xbb: map_abs(ABS_THROTTLE); break;
656 case 0xc4: map_abs(ABS_GAS); break;
657 case 0xc5: map_abs(ABS_BRAKE); break;
658 case 0xc8: map_abs(ABS_WHEEL); break;
659 default: goto ignore;
660 }
661 break;
662
663 case HID_UP_GENDESK:
664 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
665 switch (usage->hid & 0xf) {
666 case 0x1: map_key_clear(KEY_POWER); break;
667 case 0x2: map_key_clear(KEY_SLEEP); break;
668 case 0x3: map_key_clear(KEY_WAKEUP); break;
669 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
670 case 0x5: map_key_clear(KEY_MENU); break;
671 case 0x6: map_key_clear(KEY_PROG1); break;
672 case 0x7: map_key_clear(KEY_HELP); break;
673 case 0x8: map_key_clear(KEY_EXIT); break;
674 case 0x9: map_key_clear(KEY_SELECT); break;
675 case 0xa: map_key_clear(KEY_RIGHT); break;
676 case 0xb: map_key_clear(KEY_LEFT); break;
677 case 0xc: map_key_clear(KEY_UP); break;
678 case 0xd: map_key_clear(KEY_DOWN); break;
679 case 0xe: map_key_clear(KEY_POWER2); break;
680 case 0xf: map_key_clear(KEY_RESTART); break;
681 default: goto unknown;
682 }
683 break;
684 }
685
686 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
687 switch (usage->hid & 0xf) {
688 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
689 default: goto ignore;
690 }
691 break;
692 }
693
694 /*
695 * Some lazy vendors declare 255 usages for System Control,
696 * leading to the creation of ABS_X|Y axis and too many others.
697 * It wouldn't be a problem if joydev doesn't consider the
698 * device as a joystick then.
699 */
700 if (field->application == HID_GD_SYSTEM_CONTROL)
701 goto ignore;
702
703 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
704 switch (usage->hid) {
705 case HID_GD_UP: usage->hat_dir = 1; break;
706 case HID_GD_DOWN: usage->hat_dir = 5; break;
707 case HID_GD_RIGHT: usage->hat_dir = 3; break;
708 case HID_GD_LEFT: usage->hat_dir = 7; break;
709 default: goto unknown;
710 }
711 if (field->dpad) {
712 map_abs(field->dpad);
713 goto ignore;
714 }
715 map_abs(ABS_HAT0X);
716 break;
717 }
718
719 switch (usage->hid) {
720 /* These usage IDs map directly to the usage codes. */
721 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
722 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
723 if (field->flags & HID_MAIN_ITEM_RELATIVE)
724 map_rel(usage->hid & 0xf);
725 else
726 map_abs_clear(usage->hid & 0xf);
727 break;
728
729 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
730 if (field->flags & HID_MAIN_ITEM_RELATIVE)
731 map_rel(usage->hid & 0xf);
732 else
733 map_abs(usage->hid & 0xf);
734 break;
735
736 case HID_GD_HATSWITCH:
737 usage->hat_min = field->logical_minimum;
738 usage->hat_max = field->logical_maximum;
739 map_abs(ABS_HAT0X);
740 break;
741
742 case HID_GD_START: map_key_clear(BTN_START); break;
743 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
744
745 case HID_GD_RFKILL_BTN:
746 /* MS wireless radio ctl extension, also check CA */
747 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
748 map_key_clear(KEY_RFKILL);
749 /* We need to simulate the btn release */
750 field->flags |= HID_MAIN_ITEM_RELATIVE;
751 break;
752 }
753
754 default: goto unknown;
755 }
756
757 break;
758
759 case HID_UP_LED:
760 switch (usage->hid & 0xffff) { /* HID-Value: */
761 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
762 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
763 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
764 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
765 case 0x05: map_led (LED_KANA); break; /* "Kana" */
766 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
767 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
768 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
769 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
770 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
771 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
772
773 default: goto ignore;
774 }
775 break;
776
777 case HID_UP_DIGITIZER:
778 switch (usage->hid & 0xff) {
779 case 0x00: /* Undefined */
780 goto ignore;
781
782 case 0x30: /* TipPressure */
783 if (!test_bit(BTN_TOUCH, input->keybit)) {
784 device->quirks |= HID_QUIRK_NOTOUCH;
785 set_bit(EV_KEY, input->evbit);
786 set_bit(BTN_TOUCH, input->keybit);
787 }
788 map_abs_clear(ABS_PRESSURE);
789 break;
790
791 case 0x32: /* InRange */
792 switch (field->physical & 0xff) {
793 case 0x21: map_key(BTN_TOOL_MOUSE); break;
794 case 0x22: map_key(BTN_TOOL_FINGER); break;
795 default: map_key(BTN_TOOL_PEN); break;
796 }
797 break;
798
799 case 0x3b: /* Battery Strength */
800 hidinput_setup_battery(device, HID_INPUT_REPORT, field);
801 usage->type = EV_PWR;
802 return;
803
804 case 0x3c: /* Invert */
805 map_key_clear(BTN_TOOL_RUBBER);
806 break;
807
808 case 0x3d: /* X Tilt */
809 map_abs_clear(ABS_TILT_X);
810 break;
811
812 case 0x3e: /* Y Tilt */
813 map_abs_clear(ABS_TILT_Y);
814 break;
815
816 case 0x33: /* Touch */
817 case 0x42: /* TipSwitch */
818 case 0x43: /* TipSwitch2 */
819 device->quirks &= ~HID_QUIRK_NOTOUCH;
820 map_key_clear(BTN_TOUCH);
821 break;
822
823 case 0x44: /* BarrelSwitch */
824 map_key_clear(BTN_STYLUS);
825 break;
826
827 case 0x45: /* ERASER */
828 /*
829 * This event is reported when eraser tip touches the surface.
830 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
831 * tool gets in proximity.
832 */
833 map_key_clear(BTN_TOUCH);
834 break;
835
836 case 0x46: /* TabletPick */
837 case 0x5a: /* SecondaryBarrelSwitch */
838 map_key_clear(BTN_STYLUS2);
839 break;
840
841 case 0x5b: /* TransducerSerialNumber */
842 usage->type = EV_MSC;
843 usage->code = MSC_SERIAL;
844 bit = input->mscbit;
845 max = MSC_MAX;
846 break;
847
848 default: goto unknown;
849 }
850 break;
851
852 case HID_UP_TELEPHONY:
853 switch (usage->hid & HID_USAGE) {
854 case 0x2f: map_key_clear(KEY_MICMUTE); break;
855 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
856 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
857 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
858 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
859 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
860 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
861 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
862 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
863 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
864 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
865 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
866 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
867 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
868 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
869 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
870 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
871 default: goto ignore;
872 }
873 break;
874
875 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
876 switch (usage->hid & HID_USAGE) {
877 case 0x000: goto ignore;
878 case 0x030: map_key_clear(KEY_POWER); break;
879 case 0x031: map_key_clear(KEY_RESTART); break;
880 case 0x032: map_key_clear(KEY_SLEEP); break;
881 case 0x034: map_key_clear(KEY_SLEEP); break;
882 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
883 case 0x036: map_key_clear(BTN_MISC); break;
884
885 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
886 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
887 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
888 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
889 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
890 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
891 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
892 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
893 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
894
895 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
896 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
897 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
898 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
899 case 0x069: map_key_clear(KEY_RED); break;
900 case 0x06a: map_key_clear(KEY_GREEN); break;
901 case 0x06b: map_key_clear(KEY_BLUE); break;
902 case 0x06c: map_key_clear(KEY_YELLOW); break;
903 case 0x06d: map_key_clear(KEY_ZOOM); break;
904
905 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
906 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
907 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
908 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
909 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
910 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
911
912 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
913 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
914 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
915
916 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
917 case 0x083: map_key_clear(KEY_LAST); break;
918 case 0x084: map_key_clear(KEY_ENTER); break;
919 case 0x088: map_key_clear(KEY_PC); break;
920 case 0x089: map_key_clear(KEY_TV); break;
921 case 0x08a: map_key_clear(KEY_WWW); break;
922 case 0x08b: map_key_clear(KEY_DVD); break;
923 case 0x08c: map_key_clear(KEY_PHONE); break;
924 case 0x08d: map_key_clear(KEY_PROGRAM); break;
925 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
926 case 0x08f: map_key_clear(KEY_GAMES); break;
927 case 0x090: map_key_clear(KEY_MEMO); break;
928 case 0x091: map_key_clear(KEY_CD); break;
929 case 0x092: map_key_clear(KEY_VCR); break;
930 case 0x093: map_key_clear(KEY_TUNER); break;
931 case 0x094: map_key_clear(KEY_EXIT); break;
932 case 0x095: map_key_clear(KEY_HELP); break;
933 case 0x096: map_key_clear(KEY_TAPE); break;
934 case 0x097: map_key_clear(KEY_TV2); break;
935 case 0x098: map_key_clear(KEY_SAT); break;
936 case 0x09a: map_key_clear(KEY_PVR); break;
937
938 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
939 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
940 case 0x0a0: map_key_clear(KEY_VCR2); break;
941
942 case 0x0b0: map_key_clear(KEY_PLAY); break;
943 case 0x0b1: map_key_clear(KEY_PAUSE); break;
944 case 0x0b2: map_key_clear(KEY_RECORD); break;
945 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
946 case 0x0b4: map_key_clear(KEY_REWIND); break;
947 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
948 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
949 case 0x0b7: map_key_clear(KEY_STOPCD); break;
950 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
951 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
952 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
953 case 0x0bf: map_key_clear(KEY_SLOW); break;
954
955 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
956 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
957 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
958 case 0x0e2: map_key_clear(KEY_MUTE); break;
959 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
960 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
961 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
962 case 0x0f5: map_key_clear(KEY_SLOW); break;
963
964 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
965 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
966 case 0x183: map_key_clear(KEY_CONFIG); break;
967 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
968 case 0x185: map_key_clear(KEY_EDITOR); break;
969 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
970 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
971 case 0x188: map_key_clear(KEY_PRESENTATION); break;
972 case 0x189: map_key_clear(KEY_DATABASE); break;
973 case 0x18a: map_key_clear(KEY_MAIL); break;
974 case 0x18b: map_key_clear(KEY_NEWS); break;
975 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
976 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
977 case 0x18e: map_key_clear(KEY_CALENDAR); break;
978 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
979 case 0x190: map_key_clear(KEY_JOURNAL); break;
980 case 0x191: map_key_clear(KEY_FINANCE); break;
981 case 0x192: map_key_clear(KEY_CALC); break;
982 case 0x193: map_key_clear(KEY_PLAYER); break;
983 case 0x194: map_key_clear(KEY_FILE); break;
984 case 0x196: map_key_clear(KEY_WWW); break;
985 case 0x199: map_key_clear(KEY_CHAT); break;
986 case 0x19c: map_key_clear(KEY_LOGOFF); break;
987 case 0x19e: map_key_clear(KEY_COFFEE); break;
988 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
989 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
990 case 0x1a3: map_key_clear(KEY_NEXT); break;
991 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
992 case 0x1a6: map_key_clear(KEY_HELP); break;
993 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
994 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
995 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
996 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
997 case 0x1b4: map_key_clear(KEY_FILE); break;
998 case 0x1b6: map_key_clear(KEY_IMAGES); break;
999 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1000 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1001 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1002 case 0x1bd: map_key_clear(KEY_INFO); break;
1003 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1004 case 0x201: map_key_clear(KEY_NEW); break;
1005 case 0x202: map_key_clear(KEY_OPEN); break;
1006 case 0x203: map_key_clear(KEY_CLOSE); break;
1007 case 0x204: map_key_clear(KEY_EXIT); break;
1008 case 0x207: map_key_clear(KEY_SAVE); break;
1009 case 0x208: map_key_clear(KEY_PRINT); break;
1010 case 0x209: map_key_clear(KEY_PROPS); break;
1011 case 0x21a: map_key_clear(KEY_UNDO); break;
1012 case 0x21b: map_key_clear(KEY_COPY); break;
1013 case 0x21c: map_key_clear(KEY_CUT); break;
1014 case 0x21d: map_key_clear(KEY_PASTE); break;
1015 case 0x21f: map_key_clear(KEY_FIND); break;
1016 case 0x221: map_key_clear(KEY_SEARCH); break;
1017 case 0x222: map_key_clear(KEY_GOTO); break;
1018 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1019 case 0x224: map_key_clear(KEY_BACK); break;
1020 case 0x225: map_key_clear(KEY_FORWARD); break;
1021 case 0x226: map_key_clear(KEY_STOP); break;
1022 case 0x227: map_key_clear(KEY_REFRESH); break;
1023 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1024 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1025 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1026 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1027 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1028 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1029 case 0x238: map_rel(REL_HWHEEL); 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 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1041
1042 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1043 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1044 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1045 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1046 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1047 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1048
1049 case 0x29f: map_key_clear(KEY_SCALE); break;
1050
1051 default: map_key_clear(KEY_UNKNOWN);
1052 }
1053 break;
1054
1055 case HID_UP_GENDEVCTRLS:
1056 switch (usage->hid) {
1057 case HID_DC_BATTERYSTRENGTH:
1058 hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1059 usage->type = EV_PWR;
1060 return;
1061 }
1062 goto unknown;
1063
1064 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1065 set_bit(EV_REP, input->evbit);
1066 switch (usage->hid & HID_USAGE) {
1067 case 0x021: map_key_clear(KEY_PRINT); break;
1068 case 0x070: map_key_clear(KEY_HP); break;
1069 case 0x071: map_key_clear(KEY_CAMERA); break;
1070 case 0x072: map_key_clear(KEY_SOUND); break;
1071 case 0x073: map_key_clear(KEY_QUESTION); break;
1072 case 0x080: map_key_clear(KEY_EMAIL); break;
1073 case 0x081: map_key_clear(KEY_CHAT); break;
1074 case 0x082: map_key_clear(KEY_SEARCH); break;
1075 case 0x083: map_key_clear(KEY_CONNECT); break;
1076 case 0x084: map_key_clear(KEY_FINANCE); break;
1077 case 0x085: map_key_clear(KEY_SPORT); break;
1078 case 0x086: map_key_clear(KEY_SHOP); break;
1079 default: goto ignore;
1080 }
1081 break;
1082
1083 case HID_UP_HPVENDOR2:
1084 set_bit(EV_REP, input->evbit);
1085 switch (usage->hid & HID_USAGE) {
1086 case 0x001: map_key_clear(KEY_MICMUTE); break;
1087 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1088 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1089 default: goto ignore;
1090 }
1091 break;
1092
1093 case HID_UP_MSVENDOR:
1094 goto ignore;
1095
1096 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1097 set_bit(EV_REP, input->evbit);
1098 goto ignore;
1099
1100 case HID_UP_LOGIVENDOR:
1101 /* intentional fallback */
1102 case HID_UP_LOGIVENDOR2:
1103 /* intentional fallback */
1104 case HID_UP_LOGIVENDOR3:
1105 goto ignore;
1106
1107 case HID_UP_PID:
1108 switch (usage->hid & HID_USAGE) {
1109 case 0xa4: map_key_clear(BTN_DEAD); break;
1110 default: goto ignore;
1111 }
1112 break;
1113
1114 default:
1115 unknown:
1116 if (field->report_size == 1) {
1117 if (field->report->type == HID_OUTPUT_REPORT) {
1118 map_led(LED_MISC);
1119 break;
1120 }
1121 map_key(BTN_MISC);
1122 break;
1123 }
1124 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1125 map_rel(REL_MISC);
1126 break;
1127 }
1128 map_abs(ABS_MISC);
1129 break;
1130 }
1131
1132 mapped:
1133 /* Mapping failed, bail out */
1134 if (!bit)
1135 return;
1136
1137 if (device->driver->input_mapped &&
1138 device->driver->input_mapped(device, hidinput, field, usage,
1139 &bit, &max) < 0) {
1140 /*
1141 * The driver indicated that no further generic handling
1142 * of the usage is desired.
1143 */
1144 return;
1145 }
1146
1147 set_bit(usage->type, input->evbit);
1148
1149 /*
1150 * This part is *really* controversial:
1151 * - HID aims at being generic so we should do our best to export
1152 * all incoming events
1153 * - HID describes what events are, so there is no reason for ABS_X
1154 * to be mapped to ABS_Y
1155 * - HID is using *_MISC+N as a default value, but nothing prevents
1156 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1157 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1158 * processing)
1159 *
1160 * If devices still want to use this (at their own risk), they will
1161 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1162 * the default should be a reliable mapping.
1163 */
1164 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1165 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1166 usage->code = find_next_zero_bit(bit,
1167 max + 1,
1168 usage->code);
1169 } else {
1170 device->status |= HID_STAT_DUP_DETECTED;
1171 goto ignore;
1172 }
1173 }
1174
1175 if (usage->code > max)
1176 goto ignore;
1177
1178 if (usage->type == EV_ABS) {
1179
1180 int a = field->logical_minimum;
1181 int b = field->logical_maximum;
1182
1183 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1184 a = field->logical_minimum = 0;
1185 b = field->logical_maximum = 255;
1186 }
1187
1188 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1189 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1190 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1191
1192 input_abs_set_res(input, usage->code,
1193 hidinput_calc_abs_res(field, usage->code));
1194
1195 /* use a larger default input buffer for MT devices */
1196 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1197 input_set_events_per_packet(input, 60);
1198 }
1199
1200 if (usage->type == EV_ABS &&
1201 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1202 int i;
1203 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1204 input_set_abs_params(input, i, -1, 1, 0, 0);
1205 set_bit(i, input->absbit);
1206 }
1207 if (usage->hat_dir && !field->dpad)
1208 field->dpad = usage->code;
1209 }
1210
1211 /* for those devices which produce Consumer volume usage as relative,
1212 * we emulate pressing volumeup/volumedown appropriate number of times
1213 * in hidinput_hid_event()
1214 */
1215 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1216 (usage->code == ABS_VOLUME)) {
1217 set_bit(KEY_VOLUMEUP, input->keybit);
1218 set_bit(KEY_VOLUMEDOWN, input->keybit);
1219 }
1220
1221 if (usage->type == EV_KEY) {
1222 set_bit(EV_MSC, input->evbit);
1223 set_bit(MSC_SCAN, input->mscbit);
1224 }
1225
1226 return;
1227
1228 ignore:
1229 usage->type = 0;
1230 usage->code = 0;
1231 }
1232
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1233 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1234 {
1235 struct input_dev *input;
1236 unsigned *quirks = &hid->quirks;
1237
1238 if (!usage->type)
1239 return;
1240
1241 if (usage->type == EV_PWR) {
1242 hidinput_update_battery(hid, value);
1243 return;
1244 }
1245
1246 if (!field->hidinput)
1247 return;
1248
1249 input = field->hidinput->input;
1250
1251 if (usage->type == EV_ABS &&
1252 (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1253 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
1254 value = field->logical_maximum - value;
1255 }
1256
1257 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1258 int hat_dir = usage->hat_dir;
1259 if (!hat_dir)
1260 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1261 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1262 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1263 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1264 return;
1265 }
1266
1267 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1268 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1269 return;
1270 }
1271
1272 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1273 if (value) {
1274 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1275 return;
1276 }
1277 input_event(input, usage->type, usage->code, 0);
1278 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1279 return;
1280 }
1281
1282 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1283 int a = field->logical_minimum;
1284 int b = field->logical_maximum;
1285 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1286 }
1287
1288 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1289 dbg_hid("Maximum Effects - %d\n",value);
1290 return;
1291 }
1292
1293 if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1294 dbg_hid("PID Pool Report\n");
1295 return;
1296 }
1297
1298 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1299 return;
1300
1301 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1302 (usage->code == ABS_VOLUME)) {
1303 int count = abs(value);
1304 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1305 int i;
1306
1307 for (i = 0; i < count; i++) {
1308 input_event(input, EV_KEY, direction, 1);
1309 input_sync(input);
1310 input_event(input, EV_KEY, direction, 0);
1311 input_sync(input);
1312 }
1313 return;
1314 }
1315
1316 /*
1317 * Ignore out-of-range values as per HID specification,
1318 * section 5.10 and 6.2.25, when NULL state bit is present.
1319 * When it's not, clamp the value to match Microsoft's input
1320 * driver as mentioned in "Required HID usages for digitizers":
1321 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1322 *
1323 * The logical_minimum < logical_maximum check is done so that we
1324 * don't unintentionally discard values sent by devices which
1325 * don't specify logical min and max.
1326 */
1327 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1328 (field->logical_minimum < field->logical_maximum)) {
1329 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1330 (value < field->logical_minimum ||
1331 value > field->logical_maximum)) {
1332 dbg_hid("Ignoring out-of-range value %x\n", value);
1333 return;
1334 }
1335 value = clamp(value,
1336 field->logical_minimum,
1337 field->logical_maximum);
1338 }
1339
1340 /*
1341 * Ignore reports for absolute data if the data didn't change. This is
1342 * not only an optimization but also fixes 'dead' key reports. Some
1343 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1344 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1345 * can only have one of them physically available. The 'dead' keys
1346 * report constant 0. As all map to the same keycode, they'd confuse
1347 * the input layer. If we filter the 'dead' keys on the HID level, we
1348 * skip the keycode translation and only forward real events.
1349 */
1350 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1351 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1352 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1353 usage->usage_index < field->maxusage &&
1354 value == field->value[usage->usage_index])
1355 return;
1356
1357 /* report the usage code as scancode if the key status has changed */
1358 if (usage->type == EV_KEY &&
1359 (!test_bit(usage->code, input->key)) == value)
1360 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1361
1362 input_event(input, usage->type, usage->code, value);
1363
1364 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1365 usage->type == EV_KEY && value) {
1366 input_sync(input);
1367 input_event(input, usage->type, usage->code, 0);
1368 }
1369 }
1370
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1371 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1372 {
1373 struct hid_input *hidinput;
1374
1375 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1376 return;
1377
1378 list_for_each_entry(hidinput, &hid->inputs, list)
1379 input_sync(hidinput->input);
1380 }
1381 EXPORT_SYMBOL_GPL(hidinput_report_event);
1382
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1383 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1384 {
1385 struct hid_report *report;
1386 int i, j;
1387
1388 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1389 for (i = 0; i < report->maxfield; i++) {
1390 *field = report->field[i];
1391 for (j = 0; j < (*field)->maxusage; j++)
1392 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1393 return j;
1394 }
1395 }
1396 return -1;
1397 }
1398 EXPORT_SYMBOL_GPL(hidinput_find_field);
1399
hidinput_get_led_field(struct hid_device * hid)1400 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1401 {
1402 struct hid_report *report;
1403 struct hid_field *field;
1404 int i, j;
1405
1406 list_for_each_entry(report,
1407 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1408 list) {
1409 for (i = 0; i < report->maxfield; i++) {
1410 field = report->field[i];
1411 for (j = 0; j < field->maxusage; j++)
1412 if (field->usage[j].type == EV_LED)
1413 return field;
1414 }
1415 }
1416 return NULL;
1417 }
1418 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1419
hidinput_count_leds(struct hid_device * hid)1420 unsigned int hidinput_count_leds(struct hid_device *hid)
1421 {
1422 struct hid_report *report;
1423 struct hid_field *field;
1424 int i, j;
1425 unsigned int count = 0;
1426
1427 list_for_each_entry(report,
1428 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1429 list) {
1430 for (i = 0; i < report->maxfield; i++) {
1431 field = report->field[i];
1432 for (j = 0; j < field->maxusage; j++)
1433 if (field->usage[j].type == EV_LED &&
1434 field->value[j])
1435 count += 1;
1436 }
1437 }
1438 return count;
1439 }
1440 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1441
hidinput_led_worker(struct work_struct * work)1442 static void hidinput_led_worker(struct work_struct *work)
1443 {
1444 struct hid_device *hid = container_of(work, struct hid_device,
1445 led_work);
1446 struct hid_field *field;
1447 struct hid_report *report;
1448 int ret;
1449 u32 len;
1450 __u8 *buf;
1451
1452 field = hidinput_get_led_field(hid);
1453 if (!field)
1454 return;
1455
1456 /*
1457 * field->report is accessed unlocked regarding HID core. So there might
1458 * be another incoming SET-LED request from user-space, which changes
1459 * the LED state while we assemble our outgoing buffer. However, this
1460 * doesn't matter as hid_output_report() correctly converts it into a
1461 * boolean value no matter what information is currently set on the LED
1462 * field (even garbage). So the remote device will always get a valid
1463 * request.
1464 * And in case we send a wrong value, a next led worker is spawned
1465 * for every SET-LED request so the following worker will send the
1466 * correct value, guaranteed!
1467 */
1468
1469 report = field->report;
1470
1471 /* use custom SET_REPORT request if possible (asynchronous) */
1472 if (hid->ll_driver->request)
1473 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1474
1475 /* fall back to generic raw-output-report */
1476 len = hid_report_len(report);
1477 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1478 if (!buf)
1479 return;
1480
1481 hid_output_report(report, buf);
1482 /* synchronous output report */
1483 ret = hid_hw_output_report(hid, buf, len);
1484 if (ret == -ENOSYS)
1485 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1486 HID_REQ_SET_REPORT);
1487 kfree(buf);
1488 }
1489
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1490 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1491 unsigned int code, int value)
1492 {
1493 struct hid_device *hid = input_get_drvdata(dev);
1494 struct hid_field *field;
1495 int offset;
1496
1497 if (type == EV_FF)
1498 return input_ff_event(dev, type, code, value);
1499
1500 if (type != EV_LED)
1501 return -1;
1502
1503 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1504 hid_warn(dev, "event field not found\n");
1505 return -1;
1506 }
1507
1508 hid_set_field(field, offset, value);
1509
1510 schedule_work(&hid->led_work);
1511 return 0;
1512 }
1513
hidinput_open(struct input_dev * dev)1514 static int hidinput_open(struct input_dev *dev)
1515 {
1516 struct hid_device *hid = input_get_drvdata(dev);
1517
1518 return hid_hw_open(hid);
1519 }
1520
hidinput_close(struct input_dev * dev)1521 static void hidinput_close(struct input_dev *dev)
1522 {
1523 struct hid_device *hid = input_get_drvdata(dev);
1524
1525 hid_hw_close(hid);
1526 }
1527
report_features(struct hid_device * hid)1528 static void report_features(struct hid_device *hid)
1529 {
1530 struct hid_driver *drv = hid->driver;
1531 struct hid_report_enum *rep_enum;
1532 struct hid_report *rep;
1533 struct hid_usage *usage;
1534 int i, j;
1535
1536 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1537 list_for_each_entry(rep, &rep_enum->report_list, list)
1538 for (i = 0; i < rep->maxfield; i++) {
1539 /* Ignore if report count is out of bounds. */
1540 if (rep->field[i]->report_count < 1)
1541 continue;
1542
1543 for (j = 0; j < rep->field[i]->maxusage; j++) {
1544 usage = &rep->field[i]->usage[j];
1545
1546 /* Verify if Battery Strength feature is available */
1547 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1548 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1549 rep->field[i]);
1550
1551 if (drv->feature_mapping)
1552 drv->feature_mapping(hid, rep->field[i], usage);
1553 }
1554 }
1555 }
1556
hidinput_allocate(struct hid_device * hid,unsigned int application)1557 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1558 unsigned int application)
1559 {
1560 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1561 struct input_dev *input_dev = input_allocate_device();
1562 const char *suffix = NULL;
1563
1564 if (!hidinput || !input_dev)
1565 goto fail;
1566
1567 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1568 hid->maxapplication > 1) {
1569 switch (application) {
1570 case HID_GD_KEYBOARD:
1571 suffix = "Keyboard";
1572 break;
1573 case HID_GD_KEYPAD:
1574 suffix = "Keypad";
1575 break;
1576 case HID_GD_MOUSE:
1577 suffix = "Mouse";
1578 break;
1579 case HID_DG_STYLUS:
1580 suffix = "Pen";
1581 break;
1582 case HID_DG_TOUCHSCREEN:
1583 suffix = "Touchscreen";
1584 break;
1585 case HID_DG_TOUCHPAD:
1586 suffix = "Touchpad";
1587 break;
1588 case HID_GD_SYSTEM_CONTROL:
1589 suffix = "System Control";
1590 break;
1591 case HID_CP_CONSUMER_CONTROL:
1592 suffix = "Consumer Control";
1593 break;
1594 case HID_GD_WIRELESS_RADIO_CTLS:
1595 suffix = "Wireless Radio Control";
1596 break;
1597 case HID_GD_SYSTEM_MULTIAXIS:
1598 suffix = "System Multi Axis";
1599 break;
1600 default:
1601 break;
1602 }
1603 }
1604
1605 if (suffix) {
1606 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1607 hid->name, suffix);
1608 if (!hidinput->name)
1609 goto fail;
1610 }
1611
1612 input_set_drvdata(input_dev, hid);
1613 input_dev->event = hidinput_input_event;
1614 input_dev->open = hidinput_open;
1615 input_dev->close = hidinput_close;
1616 input_dev->setkeycode = hidinput_setkeycode;
1617 input_dev->getkeycode = hidinput_getkeycode;
1618
1619 input_dev->name = hidinput->name ? hidinput->name : hid->name;
1620 input_dev->phys = hid->phys;
1621 input_dev->uniq = hid->uniq;
1622 input_dev->id.bustype = hid->bus;
1623 input_dev->id.vendor = hid->vendor;
1624 input_dev->id.product = hid->product;
1625 input_dev->id.version = hid->version;
1626 input_dev->dev.parent = &hid->dev;
1627
1628 hidinput->input = input_dev;
1629 hidinput->application = application;
1630 list_add_tail(&hidinput->list, &hid->inputs);
1631
1632 INIT_LIST_HEAD(&hidinput->reports);
1633
1634 return hidinput;
1635
1636 fail:
1637 kfree(hidinput);
1638 input_free_device(input_dev);
1639 hid_err(hid, "Out of memory during hid input probe\n");
1640 return NULL;
1641 }
1642
hidinput_has_been_populated(struct hid_input * hidinput)1643 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1644 {
1645 int i;
1646 unsigned long r = 0;
1647
1648 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1649 r |= hidinput->input->evbit[i];
1650
1651 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1652 r |= hidinput->input->keybit[i];
1653
1654 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1655 r |= hidinput->input->relbit[i];
1656
1657 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1658 r |= hidinput->input->absbit[i];
1659
1660 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1661 r |= hidinput->input->mscbit[i];
1662
1663 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1664 r |= hidinput->input->ledbit[i];
1665
1666 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1667 r |= hidinput->input->sndbit[i];
1668
1669 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1670 r |= hidinput->input->ffbit[i];
1671
1672 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1673 r |= hidinput->input->swbit[i];
1674
1675 return !!r;
1676 }
1677
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)1678 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1679 struct hid_input *hidinput)
1680 {
1681 struct hid_report *report;
1682 int i, k;
1683
1684 list_del(&hidinput->list);
1685 input_free_device(hidinput->input);
1686 kfree(hidinput->name);
1687
1688 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1689 if (k == HID_OUTPUT_REPORT &&
1690 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1691 continue;
1692
1693 list_for_each_entry(report, &hid->report_enum[k].report_list,
1694 list) {
1695
1696 for (i = 0; i < report->maxfield; i++)
1697 if (report->field[i]->hidinput == hidinput)
1698 report->field[i]->hidinput = NULL;
1699 }
1700 }
1701
1702 kfree(hidinput);
1703 }
1704
hidinput_match(struct hid_report * report)1705 static struct hid_input *hidinput_match(struct hid_report *report)
1706 {
1707 struct hid_device *hid = report->device;
1708 struct hid_input *hidinput;
1709
1710 list_for_each_entry(hidinput, &hid->inputs, list) {
1711 if (hidinput->report &&
1712 hidinput->report->id == report->id)
1713 return hidinput;
1714 }
1715
1716 return NULL;
1717 }
1718
hidinput_match_application(struct hid_report * report)1719 static struct hid_input *hidinput_match_application(struct hid_report *report)
1720 {
1721 struct hid_device *hid = report->device;
1722 struct hid_input *hidinput;
1723
1724 list_for_each_entry(hidinput, &hid->inputs, list) {
1725 if (hidinput->application == report->application)
1726 return hidinput;
1727 }
1728
1729 return NULL;
1730 }
1731
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)1732 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1733 struct hid_report *report)
1734 {
1735 int i, j;
1736
1737 for (i = 0; i < report->maxfield; i++)
1738 for (j = 0; j < report->field[i]->maxusage; j++)
1739 hidinput_configure_usage(hidinput, report->field[i],
1740 report->field[i]->usage + j);
1741 }
1742
1743 /*
1744 * Register the input device; print a message.
1745 * Configure the input layer interface
1746 * Read all reports and initialize the absolute field values.
1747 */
1748
hidinput_connect(struct hid_device * hid,unsigned int force)1749 int hidinput_connect(struct hid_device *hid, unsigned int force)
1750 {
1751 struct hid_driver *drv = hid->driver;
1752 struct hid_report *report;
1753 struct hid_input *next, *hidinput = NULL;
1754 unsigned int application;
1755 int i, k;
1756
1757 INIT_LIST_HEAD(&hid->inputs);
1758 INIT_WORK(&hid->led_work, hidinput_led_worker);
1759
1760 hid->status &= ~HID_STAT_DUP_DETECTED;
1761
1762 if (!force) {
1763 for (i = 0; i < hid->maxcollection; i++) {
1764 struct hid_collection *col = &hid->collection[i];
1765 if (col->type == HID_COLLECTION_APPLICATION ||
1766 col->type == HID_COLLECTION_PHYSICAL)
1767 if (IS_INPUT_APPLICATION(col->usage))
1768 break;
1769 }
1770
1771 if (i == hid->maxcollection)
1772 return -1;
1773 }
1774
1775 report_features(hid);
1776
1777 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1778 if (k == HID_OUTPUT_REPORT &&
1779 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1780 continue;
1781
1782 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1783
1784 if (!report->maxfield)
1785 continue;
1786
1787 application = report->application;
1788
1789 /*
1790 * Find the previous hidinput report attached
1791 * to this report id.
1792 */
1793 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1794 hidinput = hidinput_match(report);
1795 else if (hid->maxapplication > 1 &&
1796 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1797 hidinput = hidinput_match_application(report);
1798
1799 if (!hidinput) {
1800 hidinput = hidinput_allocate(hid, application);
1801 if (!hidinput)
1802 goto out_unwind;
1803 }
1804
1805 hidinput_configure_usages(hidinput, report);
1806
1807 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1808 hidinput->report = report;
1809
1810 list_add_tail(&report->hidinput_list,
1811 &hidinput->reports);
1812 }
1813 }
1814
1815 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1816 if (drv->input_configured &&
1817 drv->input_configured(hid, hidinput))
1818 goto out_unwind;
1819
1820 if (!hidinput_has_been_populated(hidinput)) {
1821 /* no need to register an input device not populated */
1822 hidinput_cleanup_hidinput(hid, hidinput);
1823 continue;
1824 }
1825
1826 if (input_register_device(hidinput->input))
1827 goto out_unwind;
1828 hidinput->registered = true;
1829 }
1830
1831 if (list_empty(&hid->inputs)) {
1832 hid_err(hid, "No inputs registered, leaving\n");
1833 goto out_unwind;
1834 }
1835
1836 if (hid->status & HID_STAT_DUP_DETECTED)
1837 hid_dbg(hid,
1838 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1839
1840 return 0;
1841
1842 out_unwind:
1843 /* unwind the ones we already registered */
1844 hidinput_disconnect(hid);
1845
1846 return -1;
1847 }
1848 EXPORT_SYMBOL_GPL(hidinput_connect);
1849
hidinput_disconnect(struct hid_device * hid)1850 void hidinput_disconnect(struct hid_device *hid)
1851 {
1852 struct hid_input *hidinput, *next;
1853
1854 hidinput_cleanup_battery(hid);
1855
1856 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1857 list_del(&hidinput->list);
1858 if (hidinput->registered)
1859 input_unregister_device(hidinput->input);
1860 else
1861 input_free_device(hidinput->input);
1862 kfree(hidinput->name);
1863 kfree(hidinput);
1864 }
1865
1866 /* led_work is spawned by input_dev callbacks, but doesn't access the
1867 * parent input_dev at all. Once all input devices are removed, we
1868 * know that led_work will never get restarted, so we can cancel it
1869 * synchronously and are safe. */
1870 cancel_work_sync(&hid->led_work);
1871 }
1872 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1873
1874