1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Copyright (c) 2006-2010 Jiri Kosina
5 *
6 * HID to Linux Input mapping
7 */
8
9 /*
10 *
11 * Should you need to contact me, the author, you can do so either by
12 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
13 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
14 */
15
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/kernel.h>
19
20 #include <linux/hid.h>
21 #include <linux/hid-debug.h>
22
23 #include "hid-ids.h"
24
25 #define unk KEY_UNKNOWN
26
27 static const unsigned char hid_keyboard[256] = {
28 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
29 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
30 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
31 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
32 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
33 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
34 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
35 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
36 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
37 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
38 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
39 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
40 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
41 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
42 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
43 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
44 };
45
46 static const struct {
47 __s32 x;
48 __s32 y;
49 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
50
51 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
52 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
53 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
54 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
55
56 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
57 &max, EV_ABS, (c))
58 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
59 &max, EV_KEY, (c))
60
match_scancode(struct hid_usage * usage,unsigned int cur_idx,unsigned int scancode)61 static bool match_scancode(struct hid_usage *usage,
62 unsigned int cur_idx, unsigned int scancode)
63 {
64 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
65 }
66
match_keycode(struct hid_usage * usage,unsigned int cur_idx,unsigned int keycode)67 static bool match_keycode(struct hid_usage *usage,
68 unsigned int cur_idx, unsigned int keycode)
69 {
70 /*
71 * We should exclude unmapped usages when doing lookup by keycode.
72 */
73 return (usage->type == EV_KEY && usage->code == keycode);
74 }
75
match_index(struct hid_usage * usage,unsigned int cur_idx,unsigned int idx)76 static bool match_index(struct hid_usage *usage,
77 unsigned int cur_idx, unsigned int idx)
78 {
79 return cur_idx == idx;
80 }
81
82 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
83 unsigned int cur_idx, unsigned int val);
84
hidinput_find_key(struct hid_device * hid,hid_usage_cmp_t match,unsigned int value,unsigned int * usage_idx)85 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
86 hid_usage_cmp_t match,
87 unsigned int value,
88 unsigned int *usage_idx)
89 {
90 unsigned int i, j, k, cur_idx = 0;
91 struct hid_report *report;
92 struct hid_usage *usage;
93
94 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
95 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
96 for (i = 0; i < report->maxfield; i++) {
97 for (j = 0; j < report->field[i]->maxusage; j++) {
98 usage = report->field[i]->usage + j;
99 if (usage->type == EV_KEY || usage->type == 0) {
100 if (match(usage, cur_idx, value)) {
101 if (usage_idx)
102 *usage_idx = cur_idx;
103 return usage;
104 }
105 cur_idx++;
106 }
107 }
108 }
109 }
110 }
111 return NULL;
112 }
113
hidinput_locate_usage(struct hid_device * hid,const struct input_keymap_entry * ke,unsigned int * index)114 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
115 const struct input_keymap_entry *ke,
116 unsigned int *index)
117 {
118 struct hid_usage *usage;
119 unsigned int scancode;
120
121 if (ke->flags & INPUT_KEYMAP_BY_INDEX)
122 usage = hidinput_find_key(hid, match_index, ke->index, index);
123 else if (input_scancode_to_scalar(ke, &scancode) == 0)
124 usage = hidinput_find_key(hid, match_scancode, scancode, index);
125 else
126 usage = NULL;
127
128 return usage;
129 }
130
hidinput_getkeycode(struct input_dev * dev,struct input_keymap_entry * ke)131 static int hidinput_getkeycode(struct input_dev *dev,
132 struct input_keymap_entry *ke)
133 {
134 struct hid_device *hid = input_get_drvdata(dev);
135 struct hid_usage *usage;
136 unsigned int scancode, index;
137
138 usage = hidinput_locate_usage(hid, ke, &index);
139 if (usage) {
140 ke->keycode = usage->type == EV_KEY ?
141 usage->code : KEY_RESERVED;
142 ke->index = index;
143 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
144 ke->len = sizeof(scancode);
145 memcpy(ke->scancode, &scancode, sizeof(scancode));
146 return 0;
147 }
148
149 return -EINVAL;
150 }
151
hidinput_setkeycode(struct input_dev * dev,const struct input_keymap_entry * ke,unsigned int * old_keycode)152 static int hidinput_setkeycode(struct input_dev *dev,
153 const struct input_keymap_entry *ke,
154 unsigned int *old_keycode)
155 {
156 struct hid_device *hid = input_get_drvdata(dev);
157 struct hid_usage *usage;
158
159 usage = hidinput_locate_usage(hid, ke, NULL);
160 if (usage) {
161 *old_keycode = usage->type == EV_KEY ?
162 usage->code : KEY_RESERVED;
163 usage->code = ke->keycode;
164
165 clear_bit(*old_keycode, dev->keybit);
166 set_bit(usage->code, dev->keybit);
167 dbg_hid("Assigned keycode %d to HID usage code %x\n",
168 usage->code, usage->hid);
169
170 /*
171 * Set the keybit for the old keycode if the old keycode is used
172 * by another key
173 */
174 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
175 set_bit(*old_keycode, dev->keybit);
176
177 return 0;
178 }
179
180 return -EINVAL;
181 }
182
183
184 /**
185 * hidinput_calc_abs_res - calculate an absolute axis resolution
186 * @field: the HID report field to calculate resolution for
187 * @code: axis code
188 *
189 * The formula is:
190 * (logical_maximum - logical_minimum)
191 * resolution = ----------------------------------------------------------
192 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent
193 *
194 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
195 *
196 * Only exponent 1 length units are processed. Centimeters and inches are
197 * converted to millimeters. Degrees are converted to radians.
198 */
hidinput_calc_abs_res(const struct hid_field * field,__u16 code)199 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
200 {
201 __s32 unit_exponent = field->unit_exponent;
202 __s32 logical_extents = field->logical_maximum -
203 field->logical_minimum;
204 __s32 physical_extents = field->physical_maximum -
205 field->physical_minimum;
206 __s32 prev;
207
208 /* Check if the extents are sane */
209 if (logical_extents <= 0 || physical_extents <= 0)
210 return 0;
211
212 /*
213 * Verify and convert units.
214 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
215 */
216 switch (code) {
217 case ABS_X:
218 case ABS_Y:
219 case ABS_Z:
220 case ABS_MT_POSITION_X:
221 case ABS_MT_POSITION_Y:
222 case ABS_MT_TOOL_X:
223 case ABS_MT_TOOL_Y:
224 case ABS_MT_TOUCH_MAJOR:
225 case ABS_MT_TOUCH_MINOR:
226 if (field->unit == 0x11) { /* If centimeters */
227 /* Convert to millimeters */
228 unit_exponent += 1;
229 } else if (field->unit == 0x13) { /* If inches */
230 /* Convert to millimeters */
231 prev = physical_extents;
232 physical_extents *= 254;
233 if (physical_extents < prev)
234 return 0;
235 unit_exponent -= 1;
236 } else {
237 return 0;
238 }
239 break;
240
241 case ABS_RX:
242 case ABS_RY:
243 case ABS_RZ:
244 case ABS_WHEEL:
245 case ABS_TILT_X:
246 case ABS_TILT_Y:
247 if (field->unit == 0x14) { /* If degrees */
248 /* Convert to radians */
249 prev = logical_extents;
250 logical_extents *= 573;
251 if (logical_extents < prev)
252 return 0;
253 unit_exponent += 1;
254 } else if (field->unit != 0x12) { /* If not radians */
255 return 0;
256 }
257 break;
258
259 default:
260 return 0;
261 }
262
263 /* Apply negative unit exponent */
264 for (; unit_exponent < 0; unit_exponent++) {
265 prev = logical_extents;
266 logical_extents *= 10;
267 if (logical_extents < prev)
268 return 0;
269 }
270 /* Apply positive unit exponent */
271 for (; unit_exponent > 0; unit_exponent--) {
272 prev = physical_extents;
273 physical_extents *= 10;
274 if (physical_extents < prev)
275 return 0;
276 }
277
278 /* Calculate resolution */
279 return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
280 }
281 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
282
283 #ifdef CONFIG_HID_BATTERY_STRENGTH
284 static enum power_supply_property hidinput_battery_props[] = {
285 POWER_SUPPLY_PROP_PRESENT,
286 POWER_SUPPLY_PROP_ONLINE,
287 POWER_SUPPLY_PROP_CAPACITY,
288 POWER_SUPPLY_PROP_MODEL_NAME,
289 POWER_SUPPLY_PROP_STATUS,
290 POWER_SUPPLY_PROP_SCOPE,
291 };
292
293 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
294 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
295 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
296
297 static const struct hid_device_id hid_battery_quirks[] = {
298 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
299 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
300 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
301 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
302 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
303 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
304 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
305 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
306 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
307 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
308 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
309 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
310 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
311 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
312 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
313 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
314 USB_DEVICE_ID_ELECOM_BM084),
315 HID_BATTERY_QUIRK_IGNORE },
316 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
317 USB_DEVICE_ID_SYMBOL_SCANNER_3),
318 HID_BATTERY_QUIRK_IGNORE },
319 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
320 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
321 HID_BATTERY_QUIRK_IGNORE },
322 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
323 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
324 HID_BATTERY_QUIRK_IGNORE },
325 {}
326 };
327
find_battery_quirk(struct hid_device * hdev)328 static unsigned find_battery_quirk(struct hid_device *hdev)
329 {
330 unsigned quirks = 0;
331 const struct hid_device_id *match;
332
333 match = hid_match_id(hdev, hid_battery_quirks);
334 if (match != NULL)
335 quirks = match->driver_data;
336
337 return quirks;
338 }
339
hidinput_scale_battery_capacity(struct hid_device * dev,int value)340 static int hidinput_scale_battery_capacity(struct hid_device *dev,
341 int value)
342 {
343 if (dev->battery_min < dev->battery_max &&
344 value >= dev->battery_min && value <= dev->battery_max)
345 value = ((value - dev->battery_min) * 100) /
346 (dev->battery_max - dev->battery_min);
347
348 return value;
349 }
350
hidinput_query_battery_capacity(struct hid_device * dev)351 static int hidinput_query_battery_capacity(struct hid_device *dev)
352 {
353 u8 *buf;
354 int ret;
355
356 buf = kmalloc(4, GFP_KERNEL);
357 if (!buf)
358 return -ENOMEM;
359
360 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
361 dev->battery_report_type, HID_REQ_GET_REPORT);
362 if (ret < 2) {
363 kfree(buf);
364 return -ENODATA;
365 }
366
367 ret = hidinput_scale_battery_capacity(dev, buf[1]);
368 kfree(buf);
369 return ret;
370 }
371
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)372 static int hidinput_get_battery_property(struct power_supply *psy,
373 enum power_supply_property prop,
374 union power_supply_propval *val)
375 {
376 struct hid_device *dev = power_supply_get_drvdata(psy);
377 int value;
378 int ret = 0;
379
380 switch (prop) {
381 case POWER_SUPPLY_PROP_PRESENT:
382 case POWER_SUPPLY_PROP_ONLINE:
383 val->intval = 1;
384 break;
385
386 case POWER_SUPPLY_PROP_CAPACITY:
387 if (dev->battery_status != HID_BATTERY_REPORTED &&
388 !dev->battery_avoid_query) {
389 value = hidinput_query_battery_capacity(dev);
390 if (value < 0)
391 return value;
392 } else {
393 value = dev->battery_capacity;
394 }
395
396 val->intval = value;
397 break;
398
399 case POWER_SUPPLY_PROP_MODEL_NAME:
400 val->strval = dev->name;
401 break;
402
403 case POWER_SUPPLY_PROP_STATUS:
404 if (dev->battery_status != HID_BATTERY_REPORTED &&
405 !dev->battery_avoid_query) {
406 value = hidinput_query_battery_capacity(dev);
407 if (value < 0)
408 return value;
409
410 dev->battery_capacity = value;
411 dev->battery_status = HID_BATTERY_QUERIED;
412 }
413
414 if (dev->battery_status == HID_BATTERY_UNKNOWN)
415 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
416 else if (dev->battery_capacity == 100)
417 val->intval = POWER_SUPPLY_STATUS_FULL;
418 else
419 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
420 break;
421
422 case POWER_SUPPLY_PROP_SCOPE:
423 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
424 break;
425
426 default:
427 ret = -EINVAL;
428 break;
429 }
430
431 return ret;
432 }
433
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field)434 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
435 {
436 struct power_supply_desc *psy_desc;
437 struct power_supply_config psy_cfg = { .drv_data = dev, };
438 unsigned quirks;
439 s32 min, max;
440 int error;
441
442 if (dev->battery)
443 return 0; /* already initialized? */
444
445 quirks = find_battery_quirk(dev);
446
447 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
448 dev->bus, dev->vendor, dev->product, dev->version, quirks);
449
450 if (quirks & HID_BATTERY_QUIRK_IGNORE)
451 return 0;
452
453 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
454 if (!psy_desc)
455 return -ENOMEM;
456
457 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
458 strlen(dev->uniq) ?
459 dev->uniq : dev_name(&dev->dev));
460 if (!psy_desc->name) {
461 error = -ENOMEM;
462 goto err_free_mem;
463 }
464
465 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
466 psy_desc->properties = hidinput_battery_props;
467 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
468 psy_desc->use_for_apm = 0;
469 psy_desc->get_property = hidinput_get_battery_property;
470
471 min = field->logical_minimum;
472 max = field->logical_maximum;
473
474 if (quirks & HID_BATTERY_QUIRK_PERCENT) {
475 min = 0;
476 max = 100;
477 }
478
479 if (quirks & HID_BATTERY_QUIRK_FEATURE)
480 report_type = HID_FEATURE_REPORT;
481
482 dev->battery_min = min;
483 dev->battery_max = max;
484 dev->battery_report_type = report_type;
485 dev->battery_report_id = field->report->id;
486
487 /*
488 * Stylus is normally not connected to the device and thus we
489 * can't query the device and get meaningful battery strength.
490 * We have to wait for the device to report it on its own.
491 */
492 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
493 field->physical == HID_DG_STYLUS;
494
495 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
496 if (IS_ERR(dev->battery)) {
497 error = PTR_ERR(dev->battery);
498 hid_warn(dev, "can't register power supply: %d\n", error);
499 goto err_free_name;
500 }
501
502 power_supply_powers(dev->battery, &dev->dev);
503 return 0;
504
505 err_free_name:
506 kfree(psy_desc->name);
507 err_free_mem:
508 kfree(psy_desc);
509 dev->battery = NULL;
510 return error;
511 }
512
hidinput_cleanup_battery(struct hid_device * dev)513 static void hidinput_cleanup_battery(struct hid_device *dev)
514 {
515 const struct power_supply_desc *psy_desc;
516
517 if (!dev->battery)
518 return;
519
520 psy_desc = dev->battery->desc;
521 power_supply_unregister(dev->battery);
522 kfree(psy_desc->name);
523 kfree(psy_desc);
524 dev->battery = NULL;
525 }
526
hidinput_update_battery(struct hid_device * dev,int value)527 static void hidinput_update_battery(struct hid_device *dev, int value)
528 {
529 int capacity;
530
531 if (!dev->battery)
532 return;
533
534 if (value == 0 || value < dev->battery_min || value > dev->battery_max)
535 return;
536
537 capacity = hidinput_scale_battery_capacity(dev, value);
538
539 if (dev->battery_status != HID_BATTERY_REPORTED ||
540 capacity != dev->battery_capacity) {
541 dev->battery_capacity = capacity;
542 dev->battery_status = HID_BATTERY_REPORTED;
543 power_supply_changed(dev->battery);
544 }
545 }
546 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field)547 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
548 struct hid_field *field)
549 {
550 return 0;
551 }
552
hidinput_cleanup_battery(struct hid_device * dev)553 static void hidinput_cleanup_battery(struct hid_device *dev)
554 {
555 }
556
hidinput_update_battery(struct hid_device * dev,int value)557 static void hidinput_update_battery(struct hid_device *dev, int value)
558 {
559 }
560 #endif /* CONFIG_HID_BATTERY_STRENGTH */
561
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage)562 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
563 struct hid_usage *usage)
564 {
565 struct input_dev *input = hidinput->input;
566 struct hid_device *device = input_get_drvdata(input);
567 int max = 0, code;
568 unsigned long *bit = NULL;
569
570 field->hidinput = hidinput;
571
572 if (field->flags & HID_MAIN_ITEM_CONSTANT)
573 goto ignore;
574
575 /* Ignore if report count is out of bounds. */
576 if (field->report_count < 1)
577 goto ignore;
578
579 /* only LED usages are supported in output fields */
580 if (field->report_type == HID_OUTPUT_REPORT &&
581 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
582 goto ignore;
583 }
584
585 if (device->driver->input_mapping) {
586 int ret = device->driver->input_mapping(device, hidinput, field,
587 usage, &bit, &max);
588 if (ret > 0)
589 goto mapped;
590 if (ret < 0)
591 goto ignore;
592 }
593
594 switch (usage->hid & HID_USAGE_PAGE) {
595 case HID_UP_UNDEFINED:
596 goto ignore;
597
598 case HID_UP_KEYBOARD:
599 set_bit(EV_REP, input->evbit);
600
601 if ((usage->hid & HID_USAGE) < 256) {
602 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
603 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
604 } else
605 map_key(KEY_UNKNOWN);
606
607 break;
608
609 case HID_UP_BUTTON:
610 code = ((usage->hid - 1) & HID_USAGE);
611
612 switch (field->application) {
613 case HID_GD_MOUSE:
614 case HID_GD_POINTER: code += BTN_MOUSE; break;
615 case HID_GD_JOYSTICK:
616 if (code <= 0xf)
617 code += BTN_JOYSTICK;
618 else
619 code += BTN_TRIGGER_HAPPY - 0x10;
620 break;
621 case HID_GD_GAMEPAD:
622 if (code <= 0xf)
623 code += BTN_GAMEPAD;
624 else
625 code += BTN_TRIGGER_HAPPY - 0x10;
626 break;
627 default:
628 switch (field->physical) {
629 case HID_GD_MOUSE:
630 case HID_GD_POINTER: code += BTN_MOUSE; break;
631 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
632 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
633 default: code += BTN_MISC;
634 }
635 }
636
637 map_key(code);
638 break;
639
640 case HID_UP_SIMULATION:
641 switch (usage->hid & 0xffff) {
642 case 0xba: map_abs(ABS_RUDDER); break;
643 case 0xbb: map_abs(ABS_THROTTLE); break;
644 case 0xc4: map_abs(ABS_GAS); break;
645 case 0xc5: map_abs(ABS_BRAKE); break;
646 case 0xc8: map_abs(ABS_WHEEL); break;
647 default: goto ignore;
648 }
649 break;
650
651 case HID_UP_GENDESK:
652 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
653 switch (usage->hid & 0xf) {
654 case 0x1: map_key_clear(KEY_POWER); break;
655 case 0x2: map_key_clear(KEY_SLEEP); break;
656 case 0x3: map_key_clear(KEY_WAKEUP); break;
657 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
658 case 0x5: map_key_clear(KEY_MENU); break;
659 case 0x6: map_key_clear(KEY_PROG1); break;
660 case 0x7: map_key_clear(KEY_HELP); break;
661 case 0x8: map_key_clear(KEY_EXIT); break;
662 case 0x9: map_key_clear(KEY_SELECT); break;
663 case 0xa: map_key_clear(KEY_RIGHT); break;
664 case 0xb: map_key_clear(KEY_LEFT); break;
665 case 0xc: map_key_clear(KEY_UP); break;
666 case 0xd: map_key_clear(KEY_DOWN); break;
667 case 0xe: map_key_clear(KEY_POWER2); break;
668 case 0xf: map_key_clear(KEY_RESTART); break;
669 default: goto unknown;
670 }
671 break;
672 }
673
674 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
675 switch (usage->hid & 0xf) {
676 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
677 default: goto ignore;
678 }
679 break;
680 }
681
682 /*
683 * Some lazy vendors declare 255 usages for System Control,
684 * leading to the creation of ABS_X|Y axis and too many others.
685 * It wouldn't be a problem if joydev doesn't consider the
686 * device as a joystick then.
687 */
688 if (field->application == HID_GD_SYSTEM_CONTROL)
689 goto ignore;
690
691 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
692 switch (usage->hid) {
693 case HID_GD_UP: usage->hat_dir = 1; break;
694 case HID_GD_DOWN: usage->hat_dir = 5; break;
695 case HID_GD_RIGHT: usage->hat_dir = 3; break;
696 case HID_GD_LEFT: usage->hat_dir = 7; break;
697 default: goto unknown;
698 }
699 if (field->dpad) {
700 map_abs(field->dpad);
701 goto ignore;
702 }
703 map_abs(ABS_HAT0X);
704 break;
705 }
706
707 switch (usage->hid) {
708 /* These usage IDs map directly to the usage codes. */
709 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
710 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
711 if (field->flags & HID_MAIN_ITEM_RELATIVE)
712 map_rel(usage->hid & 0xf);
713 else
714 map_abs_clear(usage->hid & 0xf);
715 break;
716
717 case HID_GD_WHEEL:
718 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
719 set_bit(REL_WHEEL, input->relbit);
720 map_rel(REL_WHEEL_HI_RES);
721 } else {
722 map_abs(usage->hid & 0xf);
723 }
724 break;
725 case HID_GD_SLIDER: case HID_GD_DIAL:
726 if (field->flags & HID_MAIN_ITEM_RELATIVE)
727 map_rel(usage->hid & 0xf);
728 else
729 map_abs(usage->hid & 0xf);
730 break;
731
732 case HID_GD_HATSWITCH:
733 usage->hat_min = field->logical_minimum;
734 usage->hat_max = field->logical_maximum;
735 map_abs(ABS_HAT0X);
736 break;
737
738 case HID_GD_START: map_key_clear(BTN_START); break;
739 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
740
741 case HID_GD_RFKILL_BTN:
742 /* MS wireless radio ctl extension, also check CA */
743 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
744 map_key_clear(KEY_RFKILL);
745 /* We need to simulate the btn release */
746 field->flags |= HID_MAIN_ITEM_RELATIVE;
747 break;
748 }
749
750 default: goto unknown;
751 }
752
753 break;
754
755 case HID_UP_LED:
756 switch (usage->hid & 0xffff) { /* HID-Value: */
757 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
758 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
759 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
760 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
761 case 0x05: map_led (LED_KANA); break; /* "Kana" */
762 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
763 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
764 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
765 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
766 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
767 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
768
769 default: goto ignore;
770 }
771 break;
772
773 case HID_UP_DIGITIZER:
774 if ((field->application & 0xff) == 0x01) /* Digitizer */
775 __set_bit(INPUT_PROP_POINTER, input->propbit);
776 else if ((field->application & 0xff) == 0x02) /* Pen */
777 __set_bit(INPUT_PROP_DIRECT, input->propbit);
778
779 switch (usage->hid & 0xff) {
780 case 0x00: /* Undefined */
781 goto ignore;
782
783 case 0x30: /* TipPressure */
784 if (!test_bit(BTN_TOUCH, input->keybit)) {
785 device->quirks |= HID_QUIRK_NOTOUCH;
786 set_bit(EV_KEY, input->evbit);
787 set_bit(BTN_TOUCH, input->keybit);
788 }
789 map_abs_clear(ABS_PRESSURE);
790 break;
791
792 case 0x32: /* InRange */
793 switch (field->physical & 0xff) {
794 case 0x21: map_key(BTN_TOOL_MOUSE); break;
795 case 0x22: map_key(BTN_TOOL_FINGER); break;
796 default: map_key(BTN_TOOL_PEN); break;
797 }
798 break;
799
800 case 0x3b: /* Battery Strength */
801 hidinput_setup_battery(device, HID_INPUT_REPORT, field);
802 usage->type = EV_PWR;
803 return;
804
805 case 0x3c: /* Invert */
806 map_key_clear(BTN_TOOL_RUBBER);
807 break;
808
809 case 0x3d: /* X Tilt */
810 map_abs_clear(ABS_TILT_X);
811 break;
812
813 case 0x3e: /* Y Tilt */
814 map_abs_clear(ABS_TILT_Y);
815 break;
816
817 case 0x33: /* Touch */
818 case 0x42: /* TipSwitch */
819 case 0x43: /* TipSwitch2 */
820 device->quirks &= ~HID_QUIRK_NOTOUCH;
821 map_key_clear(BTN_TOUCH);
822 break;
823
824 case 0x44: /* BarrelSwitch */
825 map_key_clear(BTN_STYLUS);
826 break;
827
828 case 0x45: /* ERASER */
829 /*
830 * This event is reported when eraser tip touches the surface.
831 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
832 * tool gets in proximity.
833 */
834 map_key_clear(BTN_TOUCH);
835 break;
836
837 case 0x46: /* TabletPick */
838 case 0x5a: /* SecondaryBarrelSwitch */
839 map_key_clear(BTN_STYLUS2);
840 break;
841
842 case 0x5b: /* TransducerSerialNumber */
843 usage->type = EV_MSC;
844 usage->code = MSC_SERIAL;
845 bit = input->mscbit;
846 max = MSC_MAX;
847 break;
848
849 default: goto unknown;
850 }
851 break;
852
853 case HID_UP_TELEPHONY:
854 switch (usage->hid & HID_USAGE) {
855 case 0x2f: map_key_clear(KEY_MICMUTE); break;
856 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
857 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
858 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
859 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
860 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
861 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
862 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
863 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
864 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
865 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
866 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
867 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
868 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
869 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
870 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
871 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
872 default: goto ignore;
873 }
874 break;
875
876 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
877 switch (usage->hid & HID_USAGE) {
878 case 0x000: goto ignore;
879 case 0x030: map_key_clear(KEY_POWER); break;
880 case 0x031: map_key_clear(KEY_RESTART); break;
881 case 0x032: map_key_clear(KEY_SLEEP); break;
882 case 0x034: map_key_clear(KEY_SLEEP); break;
883 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
884 case 0x036: map_key_clear(BTN_MISC); break;
885
886 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
887 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
888 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
889 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
890 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
891 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
892 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
893 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
894 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
895
896 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
897 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
898 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
899 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
900 case 0x069: map_key_clear(KEY_RED); break;
901 case 0x06a: map_key_clear(KEY_GREEN); break;
902 case 0x06b: map_key_clear(KEY_BLUE); break;
903 case 0x06c: map_key_clear(KEY_YELLOW); break;
904 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
905
906 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
907 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
908 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
909 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
910 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
911 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
912
913 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
914 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
915 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
916
917 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
918 case 0x083: map_key_clear(KEY_LAST); break;
919 case 0x084: map_key_clear(KEY_ENTER); break;
920 case 0x088: map_key_clear(KEY_PC); break;
921 case 0x089: map_key_clear(KEY_TV); break;
922 case 0x08a: map_key_clear(KEY_WWW); break;
923 case 0x08b: map_key_clear(KEY_DVD); break;
924 case 0x08c: map_key_clear(KEY_PHONE); break;
925 case 0x08d: map_key_clear(KEY_PROGRAM); break;
926 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
927 case 0x08f: map_key_clear(KEY_GAMES); break;
928 case 0x090: map_key_clear(KEY_MEMO); break;
929 case 0x091: map_key_clear(KEY_CD); break;
930 case 0x092: map_key_clear(KEY_VCR); break;
931 case 0x093: map_key_clear(KEY_TUNER); break;
932 case 0x094: map_key_clear(KEY_EXIT); break;
933 case 0x095: map_key_clear(KEY_HELP); break;
934 case 0x096: map_key_clear(KEY_TAPE); break;
935 case 0x097: map_key_clear(KEY_TV2); break;
936 case 0x098: map_key_clear(KEY_SAT); break;
937 case 0x09a: map_key_clear(KEY_PVR); break;
938
939 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
940 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
941 case 0x0a0: map_key_clear(KEY_VCR2); break;
942
943 case 0x0b0: map_key_clear(KEY_PLAY); break;
944 case 0x0b1: map_key_clear(KEY_PAUSE); break;
945 case 0x0b2: map_key_clear(KEY_RECORD); break;
946 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
947 case 0x0b4: map_key_clear(KEY_REWIND); break;
948 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
949 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
950 case 0x0b7: map_key_clear(KEY_STOPCD); break;
951 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
952 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
953 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
954 case 0x0bf: map_key_clear(KEY_SLOW); break;
955
956 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
957 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
958 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
959 case 0x0e2: map_key_clear(KEY_MUTE); break;
960 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
961 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
962 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
963 case 0x0f5: map_key_clear(KEY_SLOW); break;
964
965 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
966 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
967 case 0x183: map_key_clear(KEY_CONFIG); break;
968 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
969 case 0x185: map_key_clear(KEY_EDITOR); break;
970 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
971 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
972 case 0x188: map_key_clear(KEY_PRESENTATION); break;
973 case 0x189: map_key_clear(KEY_DATABASE); break;
974 case 0x18a: map_key_clear(KEY_MAIL); break;
975 case 0x18b: map_key_clear(KEY_NEWS); break;
976 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
977 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
978 case 0x18e: map_key_clear(KEY_CALENDAR); break;
979 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
980 case 0x190: map_key_clear(KEY_JOURNAL); break;
981 case 0x191: map_key_clear(KEY_FINANCE); break;
982 case 0x192: map_key_clear(KEY_CALC); break;
983 case 0x193: map_key_clear(KEY_PLAYER); break;
984 case 0x194: map_key_clear(KEY_FILE); break;
985 case 0x196: map_key_clear(KEY_WWW); break;
986 case 0x199: map_key_clear(KEY_CHAT); break;
987 case 0x19c: map_key_clear(KEY_LOGOFF); break;
988 case 0x19e: map_key_clear(KEY_COFFEE); break;
989 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
990 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
991 case 0x1a3: map_key_clear(KEY_NEXT); break;
992 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
993 case 0x1a6: map_key_clear(KEY_HELP); break;
994 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
995 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
996 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
997 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
998 case 0x1b4: map_key_clear(KEY_FILE); break;
999 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1000 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1001 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1002 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1003 case 0x1bd: map_key_clear(KEY_INFO); break;
1004 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1005 case 0x201: map_key_clear(KEY_NEW); break;
1006 case 0x202: map_key_clear(KEY_OPEN); break;
1007 case 0x203: map_key_clear(KEY_CLOSE); break;
1008 case 0x204: map_key_clear(KEY_EXIT); break;
1009 case 0x207: map_key_clear(KEY_SAVE); break;
1010 case 0x208: map_key_clear(KEY_PRINT); break;
1011 case 0x209: map_key_clear(KEY_PROPS); break;
1012 case 0x21a: map_key_clear(KEY_UNDO); break;
1013 case 0x21b: map_key_clear(KEY_COPY); break;
1014 case 0x21c: map_key_clear(KEY_CUT); break;
1015 case 0x21d: map_key_clear(KEY_PASTE); break;
1016 case 0x21f: map_key_clear(KEY_FIND); break;
1017 case 0x221: map_key_clear(KEY_SEARCH); break;
1018 case 0x222: map_key_clear(KEY_GOTO); break;
1019 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1020 case 0x224: map_key_clear(KEY_BACK); break;
1021 case 0x225: map_key_clear(KEY_FORWARD); break;
1022 case 0x226: map_key_clear(KEY_STOP); break;
1023 case 0x227: map_key_clear(KEY_REFRESH); break;
1024 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1025 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1026 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1027 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1028 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1029 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1030 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1031 case 0x238: /* AC Pan */
1032 set_bit(REL_HWHEEL, input->relbit);
1033 map_rel(REL_HWHEEL_HI_RES);
1034 break;
1035 case 0x23d: map_key_clear(KEY_EDIT); break;
1036 case 0x25f: map_key_clear(KEY_CANCEL); break;
1037 case 0x269: map_key_clear(KEY_INSERT); break;
1038 case 0x26a: map_key_clear(KEY_DELETE); break;
1039 case 0x279: map_key_clear(KEY_REDO); break;
1040
1041 case 0x289: map_key_clear(KEY_REPLY); break;
1042 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1043 case 0x28c: map_key_clear(KEY_SEND); break;
1044
1045 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1046
1047 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1048 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1049 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1050 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1051 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1052 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1053
1054 case 0x29f: map_key_clear(KEY_SCALE); break;
1055
1056 default: map_key_clear(KEY_UNKNOWN);
1057 }
1058 break;
1059
1060 case HID_UP_GENDEVCTRLS:
1061 switch (usage->hid) {
1062 case HID_DC_BATTERYSTRENGTH:
1063 hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1064 usage->type = EV_PWR;
1065 return;
1066 }
1067 goto unknown;
1068
1069 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1070 set_bit(EV_REP, input->evbit);
1071 switch (usage->hid & HID_USAGE) {
1072 case 0x021: map_key_clear(KEY_PRINT); break;
1073 case 0x070: map_key_clear(KEY_HP); break;
1074 case 0x071: map_key_clear(KEY_CAMERA); break;
1075 case 0x072: map_key_clear(KEY_SOUND); break;
1076 case 0x073: map_key_clear(KEY_QUESTION); break;
1077 case 0x080: map_key_clear(KEY_EMAIL); break;
1078 case 0x081: map_key_clear(KEY_CHAT); break;
1079 case 0x082: map_key_clear(KEY_SEARCH); break;
1080 case 0x083: map_key_clear(KEY_CONNECT); break;
1081 case 0x084: map_key_clear(KEY_FINANCE); break;
1082 case 0x085: map_key_clear(KEY_SPORT); break;
1083 case 0x086: map_key_clear(KEY_SHOP); break;
1084 default: goto ignore;
1085 }
1086 break;
1087
1088 case HID_UP_HPVENDOR2:
1089 set_bit(EV_REP, input->evbit);
1090 switch (usage->hid & HID_USAGE) {
1091 case 0x001: map_key_clear(KEY_MICMUTE); break;
1092 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1093 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1094 default: goto ignore;
1095 }
1096 break;
1097
1098 case HID_UP_MSVENDOR:
1099 goto ignore;
1100
1101 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1102 set_bit(EV_REP, input->evbit);
1103 goto ignore;
1104
1105 case HID_UP_LOGIVENDOR:
1106 /* intentional fallback */
1107 case HID_UP_LOGIVENDOR2:
1108 /* intentional fallback */
1109 case HID_UP_LOGIVENDOR3:
1110 goto ignore;
1111
1112 case HID_UP_PID:
1113 switch (usage->hid & HID_USAGE) {
1114 case 0xa4: map_key_clear(BTN_DEAD); break;
1115 default: goto ignore;
1116 }
1117 break;
1118
1119 default:
1120 unknown:
1121 if (field->report_size == 1) {
1122 if (field->report->type == HID_OUTPUT_REPORT) {
1123 map_led(LED_MISC);
1124 break;
1125 }
1126 map_key(BTN_MISC);
1127 break;
1128 }
1129 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1130 map_rel(REL_MISC);
1131 break;
1132 }
1133 map_abs(ABS_MISC);
1134 break;
1135 }
1136
1137 mapped:
1138 /* Mapping failed, bail out */
1139 if (!bit)
1140 return;
1141
1142 if (device->driver->input_mapped &&
1143 device->driver->input_mapped(device, hidinput, field, usage,
1144 &bit, &max) < 0) {
1145 /*
1146 * The driver indicated that no further generic handling
1147 * of the usage is desired.
1148 */
1149 return;
1150 }
1151
1152 set_bit(usage->type, input->evbit);
1153
1154 /*
1155 * This part is *really* controversial:
1156 * - HID aims at being generic so we should do our best to export
1157 * all incoming events
1158 * - HID describes what events are, so there is no reason for ABS_X
1159 * to be mapped to ABS_Y
1160 * - HID is using *_MISC+N as a default value, but nothing prevents
1161 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1162 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1163 * processing)
1164 *
1165 * If devices still want to use this (at their own risk), they will
1166 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1167 * the default should be a reliable mapping.
1168 */
1169 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1170 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1171 usage->code = find_next_zero_bit(bit,
1172 max + 1,
1173 usage->code);
1174 } else {
1175 device->status |= HID_STAT_DUP_DETECTED;
1176 goto ignore;
1177 }
1178 }
1179
1180 if (usage->code > max)
1181 goto ignore;
1182
1183 if (usage->type == EV_ABS) {
1184
1185 int a = field->logical_minimum;
1186 int b = field->logical_maximum;
1187
1188 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1189 a = field->logical_minimum = 0;
1190 b = field->logical_maximum = 255;
1191 }
1192
1193 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1194 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1195 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1196
1197 input_abs_set_res(input, usage->code,
1198 hidinput_calc_abs_res(field, usage->code));
1199
1200 /* use a larger default input buffer for MT devices */
1201 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1202 input_set_events_per_packet(input, 60);
1203 }
1204
1205 if (usage->type == EV_ABS &&
1206 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1207 int i;
1208 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1209 input_set_abs_params(input, i, -1, 1, 0, 0);
1210 set_bit(i, input->absbit);
1211 }
1212 if (usage->hat_dir && !field->dpad)
1213 field->dpad = usage->code;
1214 }
1215
1216 /* for those devices which produce Consumer volume usage as relative,
1217 * we emulate pressing volumeup/volumedown appropriate number of times
1218 * in hidinput_hid_event()
1219 */
1220 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1221 (usage->code == ABS_VOLUME)) {
1222 set_bit(KEY_VOLUMEUP, input->keybit);
1223 set_bit(KEY_VOLUMEDOWN, input->keybit);
1224 }
1225
1226 if (usage->type == EV_KEY) {
1227 set_bit(EV_MSC, input->evbit);
1228 set_bit(MSC_SCAN, input->mscbit);
1229 }
1230
1231 return;
1232
1233 ignore:
1234 usage->type = 0;
1235 usage->code = 0;
1236 }
1237
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1238 static void hidinput_handle_scroll(struct hid_usage *usage,
1239 struct input_dev *input,
1240 __s32 value)
1241 {
1242 int code;
1243 int hi_res, lo_res;
1244
1245 if (value == 0)
1246 return;
1247
1248 if (usage->code == REL_WHEEL_HI_RES)
1249 code = REL_WHEEL;
1250 else
1251 code = REL_HWHEEL;
1252
1253 /*
1254 * Windows reports one wheel click as value 120. Where a high-res
1255 * scroll wheel is present, a fraction of 120 is reported instead.
1256 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1257 * adhere to the 120 expectation.
1258 */
1259 hi_res = value * 120/usage->resolution_multiplier;
1260
1261 usage->wheel_accumulated += hi_res;
1262 lo_res = usage->wheel_accumulated/120;
1263 if (lo_res)
1264 usage->wheel_accumulated -= lo_res * 120;
1265
1266 input_event(input, EV_REL, code, lo_res);
1267 input_event(input, EV_REL, usage->code, hi_res);
1268 }
1269
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1270 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1271 {
1272 struct input_dev *input;
1273 unsigned *quirks = &hid->quirks;
1274
1275 if (!usage->type)
1276 return;
1277
1278 if (usage->type == EV_PWR) {
1279 hidinput_update_battery(hid, value);
1280 return;
1281 }
1282
1283 if (!field->hidinput)
1284 return;
1285
1286 input = field->hidinput->input;
1287
1288 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1289 int hat_dir = usage->hat_dir;
1290 if (!hat_dir)
1291 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1292 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1293 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1294 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1295 return;
1296 }
1297
1298 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1299 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1300 return;
1301 }
1302
1303 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1304 if (value) {
1305 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1306 return;
1307 }
1308 input_event(input, usage->type, usage->code, 0);
1309 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1310 return;
1311 }
1312
1313 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1314 int a = field->logical_minimum;
1315 int b = field->logical_maximum;
1316 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1317 }
1318
1319 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1320 dbg_hid("Maximum Effects - %d\n",value);
1321 return;
1322 }
1323
1324 if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1325 dbg_hid("PID Pool Report\n");
1326 return;
1327 }
1328
1329 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1330 return;
1331
1332 if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1333 usage->code == REL_HWHEEL_HI_RES)) {
1334 hidinput_handle_scroll(usage, input, value);
1335 return;
1336 }
1337
1338 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1339 (usage->code == ABS_VOLUME)) {
1340 int count = abs(value);
1341 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1342 int i;
1343
1344 for (i = 0; i < count; i++) {
1345 input_event(input, EV_KEY, direction, 1);
1346 input_sync(input);
1347 input_event(input, EV_KEY, direction, 0);
1348 input_sync(input);
1349 }
1350 return;
1351 }
1352
1353 /*
1354 * Ignore out-of-range values as per HID specification,
1355 * section 5.10 and 6.2.25, when NULL state bit is present.
1356 * When it's not, clamp the value to match Microsoft's input
1357 * driver as mentioned in "Required HID usages for digitizers":
1358 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1359 *
1360 * The logical_minimum < logical_maximum check is done so that we
1361 * don't unintentionally discard values sent by devices which
1362 * don't specify logical min and max.
1363 */
1364 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1365 (field->logical_minimum < field->logical_maximum)) {
1366 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1367 (value < field->logical_minimum ||
1368 value > field->logical_maximum)) {
1369 dbg_hid("Ignoring out-of-range value %x\n", value);
1370 return;
1371 }
1372 value = clamp(value,
1373 field->logical_minimum,
1374 field->logical_maximum);
1375 }
1376
1377 /*
1378 * Ignore reports for absolute data if the data didn't change. This is
1379 * not only an optimization but also fixes 'dead' key reports. Some
1380 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1381 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1382 * can only have one of them physically available. The 'dead' keys
1383 * report constant 0. As all map to the same keycode, they'd confuse
1384 * the input layer. If we filter the 'dead' keys on the HID level, we
1385 * skip the keycode translation and only forward real events.
1386 */
1387 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1388 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1389 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1390 usage->usage_index < field->maxusage &&
1391 value == field->value[usage->usage_index])
1392 return;
1393
1394 /* report the usage code as scancode if the key status has changed */
1395 if (usage->type == EV_KEY &&
1396 (!test_bit(usage->code, input->key)) == value)
1397 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1398
1399 input_event(input, usage->type, usage->code, value);
1400
1401 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1402 usage->type == EV_KEY && value) {
1403 input_sync(input);
1404 input_event(input, usage->type, usage->code, 0);
1405 }
1406 }
1407
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1408 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1409 {
1410 struct hid_input *hidinput;
1411
1412 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1413 return;
1414
1415 list_for_each_entry(hidinput, &hid->inputs, list)
1416 input_sync(hidinput->input);
1417 }
1418 EXPORT_SYMBOL_GPL(hidinput_report_event);
1419
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1420 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1421 {
1422 struct hid_report *report;
1423 int i, j;
1424
1425 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1426 for (i = 0; i < report->maxfield; i++) {
1427 *field = report->field[i];
1428 for (j = 0; j < (*field)->maxusage; j++)
1429 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1430 return j;
1431 }
1432 }
1433 return -1;
1434 }
1435 EXPORT_SYMBOL_GPL(hidinput_find_field);
1436
hidinput_get_led_field(struct hid_device * hid)1437 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1438 {
1439 struct hid_report *report;
1440 struct hid_field *field;
1441 int i, j;
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 return field;
1451 }
1452 }
1453 return NULL;
1454 }
1455 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1456
hidinput_count_leds(struct hid_device * hid)1457 unsigned int hidinput_count_leds(struct hid_device *hid)
1458 {
1459 struct hid_report *report;
1460 struct hid_field *field;
1461 int i, j;
1462 unsigned int count = 0;
1463
1464 list_for_each_entry(report,
1465 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1466 list) {
1467 for (i = 0; i < report->maxfield; i++) {
1468 field = report->field[i];
1469 for (j = 0; j < field->maxusage; j++)
1470 if (field->usage[j].type == EV_LED &&
1471 field->value[j])
1472 count += 1;
1473 }
1474 }
1475 return count;
1476 }
1477 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1478
hidinput_led_worker(struct work_struct * work)1479 static void hidinput_led_worker(struct work_struct *work)
1480 {
1481 struct hid_device *hid = container_of(work, struct hid_device,
1482 led_work);
1483 struct hid_field *field;
1484 struct hid_report *report;
1485 int ret;
1486 u32 len;
1487 __u8 *buf;
1488
1489 field = hidinput_get_led_field(hid);
1490 if (!field)
1491 return;
1492
1493 /*
1494 * field->report is accessed unlocked regarding HID core. So there might
1495 * be another incoming SET-LED request from user-space, which changes
1496 * the LED state while we assemble our outgoing buffer. However, this
1497 * doesn't matter as hid_output_report() correctly converts it into a
1498 * boolean value no matter what information is currently set on the LED
1499 * field (even garbage). So the remote device will always get a valid
1500 * request.
1501 * And in case we send a wrong value, a next led worker is spawned
1502 * for every SET-LED request so the following worker will send the
1503 * correct value, guaranteed!
1504 */
1505
1506 report = field->report;
1507
1508 /* use custom SET_REPORT request if possible (asynchronous) */
1509 if (hid->ll_driver->request)
1510 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1511
1512 /* fall back to generic raw-output-report */
1513 len = hid_report_len(report);
1514 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1515 if (!buf)
1516 return;
1517
1518 hid_output_report(report, buf);
1519 /* synchronous output report */
1520 ret = hid_hw_output_report(hid, buf, len);
1521 if (ret == -ENOSYS)
1522 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1523 HID_REQ_SET_REPORT);
1524 kfree(buf);
1525 }
1526
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1527 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1528 unsigned int code, int value)
1529 {
1530 struct hid_device *hid = input_get_drvdata(dev);
1531 struct hid_field *field;
1532 int offset;
1533
1534 if (type == EV_FF)
1535 return input_ff_event(dev, type, code, value);
1536
1537 if (type != EV_LED)
1538 return -1;
1539
1540 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1541 hid_warn(dev, "event field not found\n");
1542 return -1;
1543 }
1544
1545 hid_set_field(field, offset, value);
1546
1547 schedule_work(&hid->led_work);
1548 return 0;
1549 }
1550
hidinput_open(struct input_dev * dev)1551 static int hidinput_open(struct input_dev *dev)
1552 {
1553 struct hid_device *hid = input_get_drvdata(dev);
1554
1555 return hid_hw_open(hid);
1556 }
1557
hidinput_close(struct input_dev * dev)1558 static void hidinput_close(struct input_dev *dev)
1559 {
1560 struct hid_device *hid = input_get_drvdata(dev);
1561
1562 hid_hw_close(hid);
1563 }
1564
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1565 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1566 struct hid_report *report, bool use_logical_max)
1567 {
1568 struct hid_usage *usage;
1569 bool update_needed = false;
1570 bool get_report_completed = false;
1571 int i, j;
1572
1573 if (report->maxfield == 0)
1574 return false;
1575
1576 for (i = 0; i < report->maxfield; i++) {
1577 __s32 value = use_logical_max ?
1578 report->field[i]->logical_maximum :
1579 report->field[i]->logical_minimum;
1580
1581 /* There is no good reason for a Resolution
1582 * Multiplier to have a count other than 1.
1583 * Ignore that case.
1584 */
1585 if (report->field[i]->report_count != 1)
1586 continue;
1587
1588 for (j = 0; j < report->field[i]->maxusage; j++) {
1589 usage = &report->field[i]->usage[j];
1590
1591 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1592 continue;
1593
1594 /*
1595 * If we have more than one feature within this
1596 * report we need to fill in the bits from the
1597 * others before we can overwrite the ones for the
1598 * Resolution Multiplier.
1599 *
1600 * But if we're not allowed to read from the device,
1601 * we just bail. Such a device should not exist
1602 * anyway.
1603 */
1604 if (!get_report_completed && report->maxfield > 1) {
1605 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1606 return update_needed;
1607
1608 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1609 hid_hw_wait(hid);
1610 get_report_completed = true;
1611 }
1612
1613 report->field[i]->value[j] = value;
1614 update_needed = true;
1615 }
1616 }
1617
1618 return update_needed;
1619 }
1620
hidinput_change_resolution_multipliers(struct hid_device * hid)1621 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1622 {
1623 struct hid_report_enum *rep_enum;
1624 struct hid_report *rep;
1625 int ret;
1626
1627 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1628 list_for_each_entry(rep, &rep_enum->report_list, list) {
1629 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1630 rep, true);
1631
1632 if (update_needed) {
1633 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1634 if (ret) {
1635 __hidinput_change_resolution_multipliers(hid,
1636 rep, false);
1637 return;
1638 }
1639 }
1640 }
1641
1642 /* refresh our structs */
1643 hid_setup_resolution_multiplier(hid);
1644 }
1645
report_features(struct hid_device * hid)1646 static void report_features(struct hid_device *hid)
1647 {
1648 struct hid_driver *drv = hid->driver;
1649 struct hid_report_enum *rep_enum;
1650 struct hid_report *rep;
1651 struct hid_usage *usage;
1652 int i, j;
1653
1654 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1655 list_for_each_entry(rep, &rep_enum->report_list, list)
1656 for (i = 0; i < rep->maxfield; i++) {
1657 /* Ignore if report count is out of bounds. */
1658 if (rep->field[i]->report_count < 1)
1659 continue;
1660
1661 for (j = 0; j < rep->field[i]->maxusage; j++) {
1662 usage = &rep->field[i]->usage[j];
1663
1664 /* Verify if Battery Strength feature is available */
1665 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1666 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1667 rep->field[i]);
1668
1669 if (drv->feature_mapping)
1670 drv->feature_mapping(hid, rep->field[i], usage);
1671 }
1672 }
1673 }
1674
hidinput_allocate(struct hid_device * hid,unsigned int application)1675 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1676 unsigned int application)
1677 {
1678 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1679 struct input_dev *input_dev = input_allocate_device();
1680 const char *suffix = NULL;
1681 size_t suffix_len, name_len;
1682
1683 if (!hidinput || !input_dev)
1684 goto fail;
1685
1686 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1687 hid->maxapplication > 1) {
1688 switch (application) {
1689 case HID_GD_KEYBOARD:
1690 suffix = "Keyboard";
1691 break;
1692 case HID_GD_KEYPAD:
1693 suffix = "Keypad";
1694 break;
1695 case HID_GD_MOUSE:
1696 suffix = "Mouse";
1697 break;
1698 case HID_DG_STYLUS:
1699 suffix = "Pen";
1700 break;
1701 case HID_DG_TOUCHSCREEN:
1702 suffix = "Touchscreen";
1703 break;
1704 case HID_DG_TOUCHPAD:
1705 suffix = "Touchpad";
1706 break;
1707 case HID_GD_SYSTEM_CONTROL:
1708 suffix = "System Control";
1709 break;
1710 case HID_CP_CONSUMER_CONTROL:
1711 suffix = "Consumer Control";
1712 break;
1713 case HID_GD_WIRELESS_RADIO_CTLS:
1714 suffix = "Wireless Radio Control";
1715 break;
1716 case HID_GD_SYSTEM_MULTIAXIS:
1717 suffix = "System Multi Axis";
1718 break;
1719 default:
1720 break;
1721 }
1722 }
1723
1724 if (suffix) {
1725 name_len = strlen(hid->name);
1726 suffix_len = strlen(suffix);
1727 if ((name_len < suffix_len) ||
1728 strcmp(hid->name + name_len - suffix_len, suffix)) {
1729 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1730 hid->name, suffix);
1731 if (!hidinput->name)
1732 goto fail;
1733 }
1734 }
1735
1736 input_set_drvdata(input_dev, hid);
1737 input_dev->event = hidinput_input_event;
1738 input_dev->open = hidinput_open;
1739 input_dev->close = hidinput_close;
1740 input_dev->setkeycode = hidinput_setkeycode;
1741 input_dev->getkeycode = hidinput_getkeycode;
1742
1743 input_dev->name = hidinput->name ? hidinput->name : hid->name;
1744 input_dev->phys = hid->phys;
1745 input_dev->uniq = hid->uniq;
1746 input_dev->id.bustype = hid->bus;
1747 input_dev->id.vendor = hid->vendor;
1748 input_dev->id.product = hid->product;
1749 input_dev->id.version = hid->version;
1750 input_dev->dev.parent = &hid->dev;
1751
1752 hidinput->input = input_dev;
1753 hidinput->application = application;
1754 list_add_tail(&hidinput->list, &hid->inputs);
1755
1756 INIT_LIST_HEAD(&hidinput->reports);
1757
1758 return hidinput;
1759
1760 fail:
1761 kfree(hidinput);
1762 input_free_device(input_dev);
1763 hid_err(hid, "Out of memory during hid input probe\n");
1764 return NULL;
1765 }
1766
hidinput_has_been_populated(struct hid_input * hidinput)1767 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1768 {
1769 int i;
1770 unsigned long r = 0;
1771
1772 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1773 r |= hidinput->input->evbit[i];
1774
1775 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1776 r |= hidinput->input->keybit[i];
1777
1778 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1779 r |= hidinput->input->relbit[i];
1780
1781 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1782 r |= hidinput->input->absbit[i];
1783
1784 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1785 r |= hidinput->input->mscbit[i];
1786
1787 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1788 r |= hidinput->input->ledbit[i];
1789
1790 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1791 r |= hidinput->input->sndbit[i];
1792
1793 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1794 r |= hidinput->input->ffbit[i];
1795
1796 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1797 r |= hidinput->input->swbit[i];
1798
1799 return !!r;
1800 }
1801
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)1802 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1803 struct hid_input *hidinput)
1804 {
1805 struct hid_report *report;
1806 int i, k;
1807
1808 list_del(&hidinput->list);
1809 input_free_device(hidinput->input);
1810 kfree(hidinput->name);
1811
1812 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1813 if (k == HID_OUTPUT_REPORT &&
1814 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1815 continue;
1816
1817 list_for_each_entry(report, &hid->report_enum[k].report_list,
1818 list) {
1819
1820 for (i = 0; i < report->maxfield; i++)
1821 if (report->field[i]->hidinput == hidinput)
1822 report->field[i]->hidinput = NULL;
1823 }
1824 }
1825
1826 kfree(hidinput);
1827 }
1828
hidinput_match(struct hid_report * report)1829 static struct hid_input *hidinput_match(struct hid_report *report)
1830 {
1831 struct hid_device *hid = report->device;
1832 struct hid_input *hidinput;
1833
1834 list_for_each_entry(hidinput, &hid->inputs, list) {
1835 if (hidinput->report &&
1836 hidinput->report->id == report->id)
1837 return hidinput;
1838 }
1839
1840 return NULL;
1841 }
1842
hidinput_match_application(struct hid_report * report)1843 static struct hid_input *hidinput_match_application(struct hid_report *report)
1844 {
1845 struct hid_device *hid = report->device;
1846 struct hid_input *hidinput;
1847
1848 list_for_each_entry(hidinput, &hid->inputs, list) {
1849 if (hidinput->application == report->application)
1850 return hidinput;
1851 }
1852
1853 return NULL;
1854 }
1855
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)1856 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1857 struct hid_report *report)
1858 {
1859 int i, j;
1860
1861 for (i = 0; i < report->maxfield; i++)
1862 for (j = 0; j < report->field[i]->maxusage; j++)
1863 hidinput_configure_usage(hidinput, report->field[i],
1864 report->field[i]->usage + j);
1865 }
1866
1867 /*
1868 * Register the input device; print a message.
1869 * Configure the input layer interface
1870 * Read all reports and initialize the absolute field values.
1871 */
1872
hidinput_connect(struct hid_device * hid,unsigned int force)1873 int hidinput_connect(struct hid_device *hid, unsigned int force)
1874 {
1875 struct hid_driver *drv = hid->driver;
1876 struct hid_report *report;
1877 struct hid_input *next, *hidinput = NULL;
1878 unsigned int application;
1879 int i, k;
1880
1881 INIT_LIST_HEAD(&hid->inputs);
1882 INIT_WORK(&hid->led_work, hidinput_led_worker);
1883
1884 hid->status &= ~HID_STAT_DUP_DETECTED;
1885
1886 if (!force) {
1887 for (i = 0; i < hid->maxcollection; i++) {
1888 struct hid_collection *col = &hid->collection[i];
1889 if (col->type == HID_COLLECTION_APPLICATION ||
1890 col->type == HID_COLLECTION_PHYSICAL)
1891 if (IS_INPUT_APPLICATION(col->usage))
1892 break;
1893 }
1894
1895 if (i == hid->maxcollection)
1896 return -1;
1897 }
1898
1899 report_features(hid);
1900
1901 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1902 if (k == HID_OUTPUT_REPORT &&
1903 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1904 continue;
1905
1906 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1907
1908 if (!report->maxfield)
1909 continue;
1910
1911 application = report->application;
1912
1913 /*
1914 * Find the previous hidinput report attached
1915 * to this report id.
1916 */
1917 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1918 hidinput = hidinput_match(report);
1919 else if (hid->maxapplication > 1 &&
1920 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1921 hidinput = hidinput_match_application(report);
1922
1923 if (!hidinput) {
1924 hidinput = hidinput_allocate(hid, application);
1925 if (!hidinput)
1926 goto out_unwind;
1927 }
1928
1929 hidinput_configure_usages(hidinput, report);
1930
1931 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1932 hidinput->report = report;
1933
1934 list_add_tail(&report->hidinput_list,
1935 &hidinput->reports);
1936 }
1937 }
1938
1939 hidinput_change_resolution_multipliers(hid);
1940
1941 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1942 if (drv->input_configured &&
1943 drv->input_configured(hid, hidinput))
1944 goto out_unwind;
1945
1946 if (!hidinput_has_been_populated(hidinput)) {
1947 /* no need to register an input device not populated */
1948 hidinput_cleanup_hidinput(hid, hidinput);
1949 continue;
1950 }
1951
1952 if (input_register_device(hidinput->input))
1953 goto out_unwind;
1954 hidinput->registered = true;
1955 }
1956
1957 if (list_empty(&hid->inputs)) {
1958 hid_err(hid, "No inputs registered, leaving\n");
1959 goto out_unwind;
1960 }
1961
1962 if (hid->status & HID_STAT_DUP_DETECTED)
1963 hid_dbg(hid,
1964 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1965
1966 return 0;
1967
1968 out_unwind:
1969 /* unwind the ones we already registered */
1970 hidinput_disconnect(hid);
1971
1972 return -1;
1973 }
1974 EXPORT_SYMBOL_GPL(hidinput_connect);
1975
hidinput_disconnect(struct hid_device * hid)1976 void hidinput_disconnect(struct hid_device *hid)
1977 {
1978 struct hid_input *hidinput, *next;
1979
1980 hidinput_cleanup_battery(hid);
1981
1982 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1983 list_del(&hidinput->list);
1984 if (hidinput->registered)
1985 input_unregister_device(hidinput->input);
1986 else
1987 input_free_device(hidinput->input);
1988 kfree(hidinput->name);
1989 kfree(hidinput);
1990 }
1991
1992 /* led_work is spawned by input_dev callbacks, but doesn't access the
1993 * parent input_dev at all. Once all input devices are removed, we
1994 * know that led_work will never get restarted, so we can cancel it
1995 * synchronously and are safe. */
1996 cancel_work_sync(&hid->led_work);
1997 }
1998 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1999
