1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Copyright (c) 2006-2010 Jiri Kosina
6 * HID to Linux Input mapping
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
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/kernel.h>
20 #include <linux/hid.h>
21 #include <linux/hid-debug.h>
25 #define unk KEY_UNKNOWN
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
49 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
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))
56 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
58 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
61 static bool match_scancode(struct hid_usage *usage,
62 unsigned int cur_idx, unsigned int scancode)
64 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
67 static bool match_keycode(struct hid_usage *usage,
68 unsigned int cur_idx, unsigned int keycode)
71 * We should exclude unmapped usages when doing lookup by keycode.
73 return (usage->type == EV_KEY && usage->code == keycode);
76 static bool match_index(struct hid_usage *usage,
77 unsigned int cur_idx, unsigned int idx)
79 return cur_idx == idx;
82 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
83 unsigned int cur_idx, unsigned int val);
85 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
86 hid_usage_cmp_t match,
88 unsigned int *usage_idx)
90 unsigned int i, j, k, cur_idx = 0;
91 struct hid_report *report;
92 struct hid_usage *usage;
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)) {
102 *usage_idx = cur_idx;
114 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
115 const struct input_keymap_entry *ke,
118 struct hid_usage *usage;
119 unsigned int scancode;
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);
131 static int hidinput_getkeycode(struct input_dev *dev,
132 struct input_keymap_entry *ke)
134 struct hid_device *hid = input_get_drvdata(dev);
135 struct hid_usage *usage;
136 unsigned int scancode, index;
138 usage = hidinput_locate_usage(hid, ke, &index);
140 ke->keycode = usage->type == EV_KEY ?
141 usage->code : KEY_RESERVED;
143 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
144 ke->len = sizeof(scancode);
145 memcpy(ke->scancode, &scancode, sizeof(scancode));
152 static int hidinput_setkeycode(struct input_dev *dev,
153 const struct input_keymap_entry *ke,
154 unsigned int *old_keycode)
156 struct hid_device *hid = input_get_drvdata(dev);
157 struct hid_usage *usage;
159 usage = hidinput_locate_usage(hid, ke, NULL);
161 *old_keycode = usage->type == EV_KEY ?
162 usage->code : KEY_RESERVED;
163 usage->type = EV_KEY;
164 usage->code = ke->keycode;
166 clear_bit(*old_keycode, dev->keybit);
167 set_bit(usage->code, dev->keybit);
168 dbg_hid("Assigned keycode %d to HID usage code %x\n",
169 usage->code, usage->hid);
172 * Set the keybit for the old keycode if the old keycode is used
175 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
176 set_bit(*old_keycode, dev->keybit);
186 * hidinput_calc_abs_res - calculate an absolute axis resolution
187 * @field: the HID report field to calculate resolution for
191 * (logical_maximum - logical_minimum)
192 * resolution = ----------------------------------------------------------
193 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent
195 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
197 * Only exponent 1 length units are processed. Centimeters and inches are
198 * converted to millimeters. Degrees are converted to radians.
200 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
202 __s32 unit_exponent = field->unit_exponent;
203 __s32 logical_extents = field->logical_maximum -
204 field->logical_minimum;
205 __s32 physical_extents = field->physical_maximum -
206 field->physical_minimum;
209 /* Check if the extents are sane */
210 if (logical_extents <= 0 || physical_extents <= 0)
214 * Verify and convert units.
215 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
221 case ABS_MT_POSITION_X:
222 case ABS_MT_POSITION_Y:
225 case ABS_MT_TOUCH_MAJOR:
226 case ABS_MT_TOUCH_MINOR:
227 if (field->unit == 0x11) { /* If centimeters */
228 /* Convert to millimeters */
230 } else if (field->unit == 0x13) { /* If inches */
231 /* Convert to millimeters */
232 prev = physical_extents;
233 physical_extents *= 254;
234 if (physical_extents < prev)
248 if (field->unit == 0x14) { /* If degrees */
249 /* Convert to radians */
250 prev = logical_extents;
251 logical_extents *= 573;
252 if (logical_extents < prev)
255 } else if (field->unit != 0x12) { /* If not radians */
264 /* Apply negative unit exponent */
265 for (; unit_exponent < 0; unit_exponent++) {
266 prev = logical_extents;
267 logical_extents *= 10;
268 if (logical_extents < prev)
271 /* Apply positive unit exponent */
272 for (; unit_exponent > 0; unit_exponent--) {
273 prev = physical_extents;
274 physical_extents *= 10;
275 if (physical_extents < prev)
279 /* Calculate resolution */
280 return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
282 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
284 #ifdef CONFIG_HID_BATTERY_STRENGTH
285 static enum power_supply_property hidinput_battery_props[] = {
286 POWER_SUPPLY_PROP_PRESENT,
287 POWER_SUPPLY_PROP_ONLINE,
288 POWER_SUPPLY_PROP_CAPACITY,
289 POWER_SUPPLY_PROP_MODEL_NAME,
290 POWER_SUPPLY_PROP_STATUS,
291 POWER_SUPPLY_PROP_SCOPE,
294 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
295 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
296 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
298 static const struct hid_device_id hid_battery_quirks[] = {
299 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
300 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
301 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
302 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
303 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
304 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
305 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
306 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
307 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
308 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
309 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
310 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
311 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
312 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
313 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
314 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
315 USB_DEVICE_ID_ELECOM_BM084),
316 HID_BATTERY_QUIRK_IGNORE },
317 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
318 USB_DEVICE_ID_SYMBOL_SCANNER_3),
319 HID_BATTERY_QUIRK_IGNORE },
320 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
321 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
322 HID_BATTERY_QUIRK_IGNORE },
323 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
324 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
325 HID_BATTERY_QUIRK_IGNORE },
326 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
327 HID_BATTERY_QUIRK_IGNORE },
328 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
329 HID_BATTERY_QUIRK_IGNORE },
330 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
331 HID_BATTERY_QUIRK_IGNORE },
332 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
333 HID_BATTERY_QUIRK_IGNORE },
334 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
335 HID_BATTERY_QUIRK_IGNORE },
336 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
337 HID_BATTERY_QUIRK_IGNORE },
341 static unsigned find_battery_quirk(struct hid_device *hdev)
344 const struct hid_device_id *match;
346 match = hid_match_id(hdev, hid_battery_quirks);
348 quirks = match->driver_data;
353 static int hidinput_scale_battery_capacity(struct hid_device *dev,
356 if (dev->battery_min < dev->battery_max &&
357 value >= dev->battery_min && value <= dev->battery_max)
358 value = ((value - dev->battery_min) * 100) /
359 (dev->battery_max - dev->battery_min);
364 static int hidinput_query_battery_capacity(struct hid_device *dev)
369 buf = kmalloc(4, GFP_KERNEL);
373 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
374 dev->battery_report_type, HID_REQ_GET_REPORT);
380 ret = hidinput_scale_battery_capacity(dev, buf[1]);
385 static int hidinput_get_battery_property(struct power_supply *psy,
386 enum power_supply_property prop,
387 union power_supply_propval *val)
389 struct hid_device *dev = power_supply_get_drvdata(psy);
394 case POWER_SUPPLY_PROP_PRESENT:
395 case POWER_SUPPLY_PROP_ONLINE:
399 case POWER_SUPPLY_PROP_CAPACITY:
400 if (dev->battery_status != HID_BATTERY_REPORTED &&
401 !dev->battery_avoid_query) {
402 value = hidinput_query_battery_capacity(dev);
406 value = dev->battery_capacity;
412 case POWER_SUPPLY_PROP_MODEL_NAME:
413 val->strval = dev->name;
416 case POWER_SUPPLY_PROP_STATUS:
417 if (dev->battery_status != HID_BATTERY_REPORTED &&
418 !dev->battery_avoid_query) {
419 value = hidinput_query_battery_capacity(dev);
423 dev->battery_capacity = value;
424 dev->battery_status = HID_BATTERY_QUERIED;
427 if (dev->battery_status == HID_BATTERY_UNKNOWN)
428 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
430 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
433 case POWER_SUPPLY_PROP_SCOPE:
434 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
445 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
446 struct hid_field *field, bool is_percentage)
448 struct power_supply_desc *psy_desc;
449 struct power_supply_config psy_cfg = { .drv_data = dev, };
455 return 0; /* already initialized? */
457 quirks = find_battery_quirk(dev);
459 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
460 dev->bus, dev->vendor, dev->product, dev->version, quirks);
462 if (quirks & HID_BATTERY_QUIRK_IGNORE)
465 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
469 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
471 dev->uniq : dev_name(&dev->dev));
472 if (!psy_desc->name) {
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;
483 min = field->logical_minimum;
484 max = field->logical_maximum;
486 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
491 if (quirks & HID_BATTERY_QUIRK_FEATURE)
492 report_type = HID_FEATURE_REPORT;
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;
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.
504 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
505 field->physical == HID_DG_STYLUS;
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);
514 power_supply_powers(dev->battery, &dev->dev);
518 kfree(psy_desc->name);
525 static void hidinput_cleanup_battery(struct hid_device *dev)
527 const struct power_supply_desc *psy_desc;
532 psy_desc = dev->battery->desc;
533 power_supply_unregister(dev->battery);
534 kfree(psy_desc->name);
539 static void hidinput_update_battery(struct hid_device *dev, int value)
546 if (value == 0 || value < dev->battery_min || value > dev->battery_max)
549 capacity = hidinput_scale_battery_capacity(dev, value);
551 if (dev->battery_status != HID_BATTERY_REPORTED ||
552 capacity != dev->battery_capacity ||
553 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
554 dev->battery_capacity = capacity;
555 dev->battery_status = HID_BATTERY_REPORTED;
556 dev->battery_ratelimit_time =
557 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
558 power_supply_changed(dev->battery);
561 #else /* !CONFIG_HID_BATTERY_STRENGTH */
562 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
563 struct hid_field *field, bool is_percentage)
568 static void hidinput_cleanup_battery(struct hid_device *dev)
572 static void hidinput_update_battery(struct hid_device *dev, int value)
575 #endif /* CONFIG_HID_BATTERY_STRENGTH */
577 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
578 unsigned int type, unsigned int usage)
580 struct hid_collection *collection;
582 collection = &device->collection[field->usage->collection_index];
584 return collection->type == type && collection->usage == usage;
587 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
588 struct hid_usage *usage)
590 struct input_dev *input = hidinput->input;
591 struct hid_device *device = input_get_drvdata(input);
593 unsigned long *bit = NULL;
595 field->hidinput = hidinput;
597 if (field->flags & HID_MAIN_ITEM_CONSTANT)
600 /* Ignore if report count is out of bounds. */
601 if (field->report_count < 1)
604 /* only LED usages are supported in output fields */
605 if (field->report_type == HID_OUTPUT_REPORT &&
606 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
610 if (device->driver->input_mapping) {
611 int ret = device->driver->input_mapping(device, hidinput, field,
619 switch (usage->hid & HID_USAGE_PAGE) {
620 case HID_UP_UNDEFINED:
623 case HID_UP_KEYBOARD:
624 set_bit(EV_REP, input->evbit);
626 if ((usage->hid & HID_USAGE) < 256) {
627 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
628 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
630 map_key(KEY_UNKNOWN);
635 code = ((usage->hid - 1) & HID_USAGE);
637 switch (field->application) {
639 case HID_GD_POINTER: code += BTN_MOUSE; break;
640 case HID_GD_JOYSTICK:
642 code += BTN_JOYSTICK;
644 code += BTN_TRIGGER_HAPPY - 0x10;
650 code += BTN_TRIGGER_HAPPY - 0x10;
652 case HID_CP_CONSUMER_CONTROL:
653 if (hidinput_field_in_collection(device, field,
654 HID_COLLECTION_NAMED_ARRAY,
655 HID_CP_PROGRAMMABLEBUTTONS)) {
659 code += BTN_TRIGGER_HAPPY - 0x1e;
664 switch (field->physical) {
666 case HID_GD_POINTER: code += BTN_MOUSE; break;
667 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
668 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
669 default: code += BTN_MISC;
676 case HID_UP_SIMULATION:
677 switch (usage->hid & 0xffff) {
678 case 0xba: map_abs(ABS_RUDDER); break;
679 case 0xbb: map_abs(ABS_THROTTLE); break;
680 case 0xc4: map_abs(ABS_GAS); break;
681 case 0xc5: map_abs(ABS_BRAKE); break;
682 case 0xc8: map_abs(ABS_WHEEL); break;
683 default: goto ignore;
688 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
689 switch (usage->hid & 0xf) {
690 case 0x1: map_key_clear(KEY_POWER); break;
691 case 0x2: map_key_clear(KEY_SLEEP); break;
692 case 0x3: map_key_clear(KEY_WAKEUP); break;
693 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
694 case 0x5: map_key_clear(KEY_MENU); break;
695 case 0x6: map_key_clear(KEY_PROG1); break;
696 case 0x7: map_key_clear(KEY_HELP); break;
697 case 0x8: map_key_clear(KEY_EXIT); break;
698 case 0x9: map_key_clear(KEY_SELECT); break;
699 case 0xa: map_key_clear(KEY_RIGHT); break;
700 case 0xb: map_key_clear(KEY_LEFT); break;
701 case 0xc: map_key_clear(KEY_UP); break;
702 case 0xd: map_key_clear(KEY_DOWN); break;
703 case 0xe: map_key_clear(KEY_POWER2); break;
704 case 0xf: map_key_clear(KEY_RESTART); break;
705 default: goto unknown;
710 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
711 switch (usage->hid & 0xf) {
712 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
713 default: goto ignore;
719 * Some lazy vendors declare 255 usages for System Control,
720 * leading to the creation of ABS_X|Y axis and too many others.
721 * It wouldn't be a problem if joydev doesn't consider the
722 * device as a joystick then.
724 if (field->application == HID_GD_SYSTEM_CONTROL)
727 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
728 switch (usage->hid) {
729 case HID_GD_UP: usage->hat_dir = 1; break;
730 case HID_GD_DOWN: usage->hat_dir = 5; break;
731 case HID_GD_RIGHT: usage->hat_dir = 3; break;
732 case HID_GD_LEFT: usage->hat_dir = 7; break;
733 default: goto unknown;
736 map_abs(field->dpad);
743 switch (usage->hid) {
744 /* These usage IDs map directly to the usage codes. */
745 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
746 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
747 if (field->flags & HID_MAIN_ITEM_RELATIVE)
748 map_rel(usage->hid & 0xf);
750 map_abs_clear(usage->hid & 0xf);
754 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
755 set_bit(REL_WHEEL, input->relbit);
756 map_rel(REL_WHEEL_HI_RES);
758 map_abs(usage->hid & 0xf);
761 case HID_GD_SLIDER: case HID_GD_DIAL:
762 if (field->flags & HID_MAIN_ITEM_RELATIVE)
763 map_rel(usage->hid & 0xf);
765 map_abs(usage->hid & 0xf);
768 case HID_GD_HATSWITCH:
769 usage->hat_min = field->logical_minimum;
770 usage->hat_max = field->logical_maximum;
774 case HID_GD_START: map_key_clear(BTN_START); break;
775 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
777 case HID_GD_RFKILL_BTN:
778 /* MS wireless radio ctl extension, also check CA */
779 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
780 map_key_clear(KEY_RFKILL);
781 /* We need to simulate the btn release */
782 field->flags |= HID_MAIN_ITEM_RELATIVE;
787 default: goto unknown;
793 switch (usage->hid & 0xffff) { /* HID-Value: */
794 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
795 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
796 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
797 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
798 case 0x05: map_led (LED_KANA); break; /* "Kana" */
799 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
800 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
801 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
802 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
803 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
804 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
806 default: goto ignore;
810 case HID_UP_DIGITIZER:
811 if ((field->application & 0xff) == 0x01) /* Digitizer */
812 __set_bit(INPUT_PROP_POINTER, input->propbit);
813 else if ((field->application & 0xff) == 0x02) /* Pen */
814 __set_bit(INPUT_PROP_DIRECT, input->propbit);
816 switch (usage->hid & 0xff) {
817 case 0x00: /* Undefined */
820 case 0x30: /* TipPressure */
821 if (!test_bit(BTN_TOUCH, input->keybit)) {
822 device->quirks |= HID_QUIRK_NOTOUCH;
823 set_bit(EV_KEY, input->evbit);
824 set_bit(BTN_TOUCH, input->keybit);
826 map_abs_clear(ABS_PRESSURE);
829 case 0x32: /* InRange */
830 switch (field->physical & 0xff) {
831 case 0x21: map_key(BTN_TOOL_MOUSE); break;
832 case 0x22: map_key(BTN_TOOL_FINGER); break;
833 default: map_key(BTN_TOOL_PEN); break;
837 case 0x3b: /* Battery Strength */
838 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
839 usage->type = EV_PWR;
842 case 0x3c: /* Invert */
843 map_key_clear(BTN_TOOL_RUBBER);
846 case 0x3d: /* X Tilt */
847 map_abs_clear(ABS_TILT_X);
850 case 0x3e: /* Y Tilt */
851 map_abs_clear(ABS_TILT_Y);
854 case 0x33: /* Touch */
855 case 0x42: /* TipSwitch */
856 case 0x43: /* TipSwitch2 */
857 device->quirks &= ~HID_QUIRK_NOTOUCH;
858 map_key_clear(BTN_TOUCH);
861 case 0x44: /* BarrelSwitch */
862 map_key_clear(BTN_STYLUS);
865 case 0x45: /* ERASER */
867 * This event is reported when eraser tip touches the surface.
868 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
869 * tool gets in proximity.
871 map_key_clear(BTN_TOUCH);
874 case 0x46: /* TabletPick */
875 case 0x5a: /* SecondaryBarrelSwitch */
876 map_key_clear(BTN_STYLUS2);
879 case 0x5b: /* TransducerSerialNumber */
880 usage->type = EV_MSC;
881 usage->code = MSC_SERIAL;
886 default: goto unknown;
890 case HID_UP_TELEPHONY:
891 switch (usage->hid & HID_USAGE) {
892 case 0x2f: map_key_clear(KEY_MICMUTE); break;
893 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
894 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
895 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
896 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
897 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
898 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
899 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
900 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
901 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
902 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
903 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
904 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
905 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
906 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
907 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
908 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
909 default: goto ignore;
913 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
914 switch (usage->hid & HID_USAGE) {
915 case 0x000: goto ignore;
916 case 0x030: map_key_clear(KEY_POWER); break;
917 case 0x031: map_key_clear(KEY_RESTART); break;
918 case 0x032: map_key_clear(KEY_SLEEP); break;
919 case 0x034: map_key_clear(KEY_SLEEP); break;
920 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
921 case 0x036: map_key_clear(BTN_MISC); break;
923 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
924 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
925 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
926 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
927 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
928 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
929 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
930 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
931 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
933 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
934 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
935 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
936 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
937 case 0x069: map_key_clear(KEY_RED); break;
938 case 0x06a: map_key_clear(KEY_GREEN); break;
939 case 0x06b: map_key_clear(KEY_BLUE); break;
940 case 0x06c: map_key_clear(KEY_YELLOW); break;
941 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
943 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
944 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
945 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
946 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
947 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
948 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
950 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
951 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
952 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
954 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
955 case 0x083: map_key_clear(KEY_LAST); break;
956 case 0x084: map_key_clear(KEY_ENTER); break;
957 case 0x088: map_key_clear(KEY_PC); break;
958 case 0x089: map_key_clear(KEY_TV); break;
959 case 0x08a: map_key_clear(KEY_WWW); break;
960 case 0x08b: map_key_clear(KEY_DVD); break;
961 case 0x08c: map_key_clear(KEY_PHONE); break;
962 case 0x08d: map_key_clear(KEY_PROGRAM); break;
963 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
964 case 0x08f: map_key_clear(KEY_GAMES); break;
965 case 0x090: map_key_clear(KEY_MEMO); break;
966 case 0x091: map_key_clear(KEY_CD); break;
967 case 0x092: map_key_clear(KEY_VCR); break;
968 case 0x093: map_key_clear(KEY_TUNER); break;
969 case 0x094: map_key_clear(KEY_EXIT); break;
970 case 0x095: map_key_clear(KEY_HELP); break;
971 case 0x096: map_key_clear(KEY_TAPE); break;
972 case 0x097: map_key_clear(KEY_TV2); break;
973 case 0x098: map_key_clear(KEY_SAT); break;
974 case 0x09a: map_key_clear(KEY_PVR); break;
976 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
977 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
978 case 0x0a0: map_key_clear(KEY_VCR2); break;
980 case 0x0b0: map_key_clear(KEY_PLAY); break;
981 case 0x0b1: map_key_clear(KEY_PAUSE); break;
982 case 0x0b2: map_key_clear(KEY_RECORD); break;
983 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
984 case 0x0b4: map_key_clear(KEY_REWIND); break;
985 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
986 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
987 case 0x0b7: map_key_clear(KEY_STOPCD); break;
988 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
989 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
990 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
991 case 0x0bf: map_key_clear(KEY_SLOW); break;
993 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
994 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
996 case 0x0d8: map_key_clear(KEY_DICTATE); break;
997 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
999 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1000 case 0x0e2: map_key_clear(KEY_MUTE); break;
1001 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1002 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1003 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1004 case 0x0f5: map_key_clear(KEY_SLOW); break;
1006 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1007 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1008 case 0x183: map_key_clear(KEY_CONFIG); break;
1009 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1010 case 0x185: map_key_clear(KEY_EDITOR); break;
1011 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1012 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1013 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1014 case 0x189: map_key_clear(KEY_DATABASE); break;
1015 case 0x18a: map_key_clear(KEY_MAIL); break;
1016 case 0x18b: map_key_clear(KEY_NEWS); break;
1017 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1018 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1019 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1020 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1021 case 0x190: map_key_clear(KEY_JOURNAL); break;
1022 case 0x191: map_key_clear(KEY_FINANCE); break;
1023 case 0x192: map_key_clear(KEY_CALC); break;
1024 case 0x193: map_key_clear(KEY_PLAYER); break;
1025 case 0x194: map_key_clear(KEY_FILE); break;
1026 case 0x196: map_key_clear(KEY_WWW); break;
1027 case 0x199: map_key_clear(KEY_CHAT); break;
1028 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1029 case 0x19e: map_key_clear(KEY_COFFEE); break;
1030 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1031 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1032 case 0x1a3: map_key_clear(KEY_NEXT); break;
1033 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1034 case 0x1a6: map_key_clear(KEY_HELP); break;
1035 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1036 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1037 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1038 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1039 case 0x1b4: map_key_clear(KEY_FILE); break;
1040 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1041 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1042 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1043 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1044 case 0x1bd: map_key_clear(KEY_INFO); break;
1045 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1046 case 0x201: map_key_clear(KEY_NEW); break;
1047 case 0x202: map_key_clear(KEY_OPEN); break;
1048 case 0x203: map_key_clear(KEY_CLOSE); break;
1049 case 0x204: map_key_clear(KEY_EXIT); break;
1050 case 0x207: map_key_clear(KEY_SAVE); break;
1051 case 0x208: map_key_clear(KEY_PRINT); break;
1052 case 0x209: map_key_clear(KEY_PROPS); break;
1053 case 0x21a: map_key_clear(KEY_UNDO); break;
1054 case 0x21b: map_key_clear(KEY_COPY); break;
1055 case 0x21c: map_key_clear(KEY_CUT); break;
1056 case 0x21d: map_key_clear(KEY_PASTE); break;
1057 case 0x21f: map_key_clear(KEY_FIND); break;
1058 case 0x221: map_key_clear(KEY_SEARCH); break;
1059 case 0x222: map_key_clear(KEY_GOTO); break;
1060 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1061 case 0x224: map_key_clear(KEY_BACK); break;
1062 case 0x225: map_key_clear(KEY_FORWARD); break;
1063 case 0x226: map_key_clear(KEY_STOP); break;
1064 case 0x227: map_key_clear(KEY_REFRESH); break;
1065 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1066 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1067 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1068 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1069 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1070 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1071 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1072 case 0x238: /* AC Pan */
1073 set_bit(REL_HWHEEL, input->relbit);
1074 map_rel(REL_HWHEEL_HI_RES);
1076 case 0x23d: map_key_clear(KEY_EDIT); break;
1077 case 0x25f: map_key_clear(KEY_CANCEL); break;
1078 case 0x269: map_key_clear(KEY_INSERT); break;
1079 case 0x26a: map_key_clear(KEY_DELETE); break;
1080 case 0x279: map_key_clear(KEY_REDO); break;
1082 case 0x289: map_key_clear(KEY_REPLY); break;
1083 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1084 case 0x28c: map_key_clear(KEY_SEND); break;
1086 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1088 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1090 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1091 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1092 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1093 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1094 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1095 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1097 case 0x29f: map_key_clear(KEY_SCALE); break;
1099 default: map_key_clear(KEY_UNKNOWN);
1103 case HID_UP_GENDEVCTRLS:
1104 switch (usage->hid) {
1105 case HID_DC_BATTERYSTRENGTH:
1106 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1107 usage->type = EV_PWR;
1112 case HID_UP_BATTERY:
1113 switch (usage->hid) {
1114 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1115 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1116 usage->type = EV_PWR;
1121 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1122 set_bit(EV_REP, input->evbit);
1123 switch (usage->hid & HID_USAGE) {
1124 case 0x021: map_key_clear(KEY_PRINT); break;
1125 case 0x070: map_key_clear(KEY_HP); break;
1126 case 0x071: map_key_clear(KEY_CAMERA); break;
1127 case 0x072: map_key_clear(KEY_SOUND); break;
1128 case 0x073: map_key_clear(KEY_QUESTION); break;
1129 case 0x080: map_key_clear(KEY_EMAIL); break;
1130 case 0x081: map_key_clear(KEY_CHAT); break;
1131 case 0x082: map_key_clear(KEY_SEARCH); break;
1132 case 0x083: map_key_clear(KEY_CONNECT); break;
1133 case 0x084: map_key_clear(KEY_FINANCE); break;
1134 case 0x085: map_key_clear(KEY_SPORT); break;
1135 case 0x086: map_key_clear(KEY_SHOP); break;
1136 default: goto ignore;
1140 case HID_UP_HPVENDOR2:
1141 set_bit(EV_REP, input->evbit);
1142 switch (usage->hid & HID_USAGE) {
1143 case 0x001: map_key_clear(KEY_MICMUTE); break;
1144 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1145 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1146 default: goto ignore;
1150 case HID_UP_MSVENDOR:
1153 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1154 set_bit(EV_REP, input->evbit);
1157 case HID_UP_LOGIVENDOR:
1158 /* intentional fallback */
1159 case HID_UP_LOGIVENDOR2:
1160 /* intentional fallback */
1161 case HID_UP_LOGIVENDOR3:
1165 switch (usage->hid & HID_USAGE) {
1166 case 0xa4: map_key_clear(BTN_DEAD); break;
1167 default: goto ignore;
1173 if (field->report_size == 1) {
1174 if (field->report->type == HID_OUTPUT_REPORT) {
1181 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1190 /* Mapping failed, bail out */
1194 if (device->driver->input_mapped &&
1195 device->driver->input_mapped(device, hidinput, field, usage,
1198 * The driver indicated that no further generic handling
1199 * of the usage is desired.
1204 set_bit(usage->type, input->evbit);
1207 * This part is *really* controversial:
1208 * - HID aims at being generic so we should do our best to export
1209 * all incoming events
1210 * - HID describes what events are, so there is no reason for ABS_X
1211 * to be mapped to ABS_Y
1212 * - HID is using *_MISC+N as a default value, but nothing prevents
1213 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1214 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1217 * If devices still want to use this (at their own risk), they will
1218 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1219 * the default should be a reliable mapping.
1221 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1222 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1223 usage->code = find_next_zero_bit(bit,
1227 device->status |= HID_STAT_DUP_DETECTED;
1232 if (usage->code > max)
1235 if (usage->type == EV_ABS) {
1237 int a = field->logical_minimum;
1238 int b = field->logical_maximum;
1240 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1241 a = field->logical_minimum = 0;
1242 b = field->logical_maximum = 255;
1245 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1246 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1247 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1249 input_abs_set_res(input, usage->code,
1250 hidinput_calc_abs_res(field, usage->code));
1252 /* use a larger default input buffer for MT devices */
1253 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1254 input_set_events_per_packet(input, 60);
1257 if (usage->type == EV_ABS &&
1258 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1260 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1261 input_set_abs_params(input, i, -1, 1, 0, 0);
1262 set_bit(i, input->absbit);
1264 if (usage->hat_dir && !field->dpad)
1265 field->dpad = usage->code;
1268 /* for those devices which produce Consumer volume usage as relative,
1269 * we emulate pressing volumeup/volumedown appropriate number of times
1270 * in hidinput_hid_event()
1272 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1273 (usage->code == ABS_VOLUME)) {
1274 set_bit(KEY_VOLUMEUP, input->keybit);
1275 set_bit(KEY_VOLUMEDOWN, input->keybit);
1278 if (usage->type == EV_KEY) {
1279 set_bit(EV_MSC, input->evbit);
1280 set_bit(MSC_SCAN, input->mscbit);
1290 static void hidinput_handle_scroll(struct hid_usage *usage,
1291 struct input_dev *input,
1300 if (usage->code == REL_WHEEL_HI_RES)
1306 * Windows reports one wheel click as value 120. Where a high-res
1307 * scroll wheel is present, a fraction of 120 is reported instead.
1308 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1309 * adhere to the 120 expectation.
1311 hi_res = value * 120/usage->resolution_multiplier;
1313 usage->wheel_accumulated += hi_res;
1314 lo_res = usage->wheel_accumulated/120;
1316 usage->wheel_accumulated -= lo_res * 120;
1318 input_event(input, EV_REL, code, lo_res);
1319 input_event(input, EV_REL, usage->code, hi_res);
1322 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1324 struct input_dev *input;
1325 unsigned *quirks = &hid->quirks;
1330 if (usage->type == EV_PWR) {
1331 hidinput_update_battery(hid, value);
1335 if (!field->hidinput)
1338 input = field->hidinput->input;
1340 if (usage->type == EV_ABS &&
1341 (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1342 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
1343 value = field->logical_maximum - value;
1346 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1347 int hat_dir = usage->hat_dir;
1349 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1350 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1351 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1352 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1356 if (usage->hid == HID_DG_INVERT) {
1357 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1361 if (usage->hid == HID_DG_INRANGE) {
1363 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1366 input_event(input, usage->type, usage->code, 0);
1367 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1371 if (usage->hid == HID_DG_TIPPRESSURE && (*quirks & HID_QUIRK_NOTOUCH)) {
1372 int a = field->logical_minimum;
1373 int b = field->logical_maximum;
1374 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1377 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1378 dbg_hid("Maximum Effects - %d\n",value);
1382 if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1383 dbg_hid("PID Pool Report\n");
1387 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1390 if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1391 usage->code == REL_HWHEEL_HI_RES)) {
1392 hidinput_handle_scroll(usage, input, value);
1396 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1397 (usage->code == ABS_VOLUME)) {
1398 int count = abs(value);
1399 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1402 for (i = 0; i < count; i++) {
1403 input_event(input, EV_KEY, direction, 1);
1405 input_event(input, EV_KEY, direction, 0);
1412 * Ignore out-of-range values as per HID specification,
1413 * section 5.10 and 6.2.25, when NULL state bit is present.
1414 * When it's not, clamp the value to match Microsoft's input
1415 * driver as mentioned in "Required HID usages for digitizers":
1416 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1418 * The logical_minimum < logical_maximum check is done so that we
1419 * don't unintentionally discard values sent by devices which
1420 * don't specify logical min and max.
1422 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1423 (field->logical_minimum < field->logical_maximum)) {
1424 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1425 (value < field->logical_minimum ||
1426 value > field->logical_maximum)) {
1427 dbg_hid("Ignoring out-of-range value %x\n", value);
1430 value = clamp(value,
1431 field->logical_minimum,
1432 field->logical_maximum);
1436 * Ignore reports for absolute data if the data didn't change. This is
1437 * not only an optimization but also fixes 'dead' key reports. Some
1438 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1439 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1440 * can only have one of them physically available. The 'dead' keys
1441 * report constant 0. As all map to the same keycode, they'd confuse
1442 * the input layer. If we filter the 'dead' keys on the HID level, we
1443 * skip the keycode translation and only forward real events.
1445 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1446 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1447 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1448 usage->usage_index < field->maxusage &&
1449 value == field->value[usage->usage_index])
1452 /* report the usage code as scancode if the key status has changed */
1453 if (usage->type == EV_KEY &&
1454 (!test_bit(usage->code, input->key)) == value)
1455 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1457 input_event(input, usage->type, usage->code, value);
1459 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1460 usage->type == EV_KEY && value) {
1462 input_event(input, usage->type, usage->code, 0);
1466 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1468 struct hid_input *hidinput;
1470 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1473 list_for_each_entry(hidinput, &hid->inputs, list)
1474 input_sync(hidinput->input);
1476 EXPORT_SYMBOL_GPL(hidinput_report_event);
1478 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1480 struct hid_report *report;
1483 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1484 for (i = 0; i < report->maxfield; i++) {
1485 *field = report->field[i];
1486 for (j = 0; j < (*field)->maxusage; j++)
1487 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1493 EXPORT_SYMBOL_GPL(hidinput_find_field);
1495 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1497 struct hid_report *report;
1498 struct hid_field *field;
1501 list_for_each_entry(report,
1502 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1504 for (i = 0; i < report->maxfield; i++) {
1505 field = report->field[i];
1506 for (j = 0; j < field->maxusage; j++)
1507 if (field->usage[j].type == EV_LED)
1513 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1515 unsigned int hidinput_count_leds(struct hid_device *hid)
1517 struct hid_report *report;
1518 struct hid_field *field;
1520 unsigned int count = 0;
1522 list_for_each_entry(report,
1523 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1525 for (i = 0; i < report->maxfield; i++) {
1526 field = report->field[i];
1527 for (j = 0; j < field->maxusage; j++)
1528 if (field->usage[j].type == EV_LED &&
1535 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1537 static void hidinput_led_worker(struct work_struct *work)
1539 struct hid_device *hid = container_of(work, struct hid_device,
1541 struct hid_field *field;
1542 struct hid_report *report;
1547 field = hidinput_get_led_field(hid);
1552 * field->report is accessed unlocked regarding HID core. So there might
1553 * be another incoming SET-LED request from user-space, which changes
1554 * the LED state while we assemble our outgoing buffer. However, this
1555 * doesn't matter as hid_output_report() correctly converts it into a
1556 * boolean value no matter what information is currently set on the LED
1557 * field (even garbage). So the remote device will always get a valid
1559 * And in case we send a wrong value, a next led worker is spawned
1560 * for every SET-LED request so the following worker will send the
1561 * correct value, guaranteed!
1564 report = field->report;
1566 /* use custom SET_REPORT request if possible (asynchronous) */
1567 if (hid->ll_driver->request)
1568 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1570 /* fall back to generic raw-output-report */
1571 len = hid_report_len(report);
1572 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1576 hid_output_report(report, buf);
1577 /* synchronous output report */
1578 ret = hid_hw_output_report(hid, buf, len);
1580 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1581 HID_REQ_SET_REPORT);
1585 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1586 unsigned int code, int value)
1588 struct hid_device *hid = input_get_drvdata(dev);
1589 struct hid_field *field;
1593 return input_ff_event(dev, type, code, value);
1598 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1599 hid_warn(dev, "event field not found\n");
1603 hid_set_field(field, offset, value);
1605 schedule_work(&hid->led_work);
1609 static int hidinput_open(struct input_dev *dev)
1611 struct hid_device *hid = input_get_drvdata(dev);
1613 return hid_hw_open(hid);
1616 static void hidinput_close(struct input_dev *dev)
1618 struct hid_device *hid = input_get_drvdata(dev);
1623 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1624 struct hid_report *report, bool use_logical_max)
1626 struct hid_usage *usage;
1627 bool update_needed = false;
1628 bool get_report_completed = false;
1631 if (report->maxfield == 0)
1634 for (i = 0; i < report->maxfield; i++) {
1635 __s32 value = use_logical_max ?
1636 report->field[i]->logical_maximum :
1637 report->field[i]->logical_minimum;
1639 /* There is no good reason for a Resolution
1640 * Multiplier to have a count other than 1.
1643 if (report->field[i]->report_count != 1)
1646 for (j = 0; j < report->field[i]->maxusage; j++) {
1647 usage = &report->field[i]->usage[j];
1649 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1653 * If we have more than one feature within this
1654 * report we need to fill in the bits from the
1655 * others before we can overwrite the ones for the
1656 * Resolution Multiplier.
1658 * But if we're not allowed to read from the device,
1659 * we just bail. Such a device should not exist
1662 if (!get_report_completed && report->maxfield > 1) {
1663 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1664 return update_needed;
1666 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1668 get_report_completed = true;
1671 report->field[i]->value[j] = value;
1672 update_needed = true;
1676 return update_needed;
1679 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1681 struct hid_report_enum *rep_enum;
1682 struct hid_report *rep;
1685 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1686 list_for_each_entry(rep, &rep_enum->report_list, list) {
1687 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1690 if (update_needed) {
1691 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1693 __hidinput_change_resolution_multipliers(hid,
1700 /* refresh our structs */
1701 hid_setup_resolution_multiplier(hid);
1704 static void report_features(struct hid_device *hid)
1706 struct hid_driver *drv = hid->driver;
1707 struct hid_report_enum *rep_enum;
1708 struct hid_report *rep;
1709 struct hid_usage *usage;
1712 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1713 list_for_each_entry(rep, &rep_enum->report_list, list)
1714 for (i = 0; i < rep->maxfield; i++) {
1715 /* Ignore if report count is out of bounds. */
1716 if (rep->field[i]->report_count < 1)
1719 for (j = 0; j < rep->field[i]->maxusage; j++) {
1720 usage = &rep->field[i]->usage[j];
1722 /* Verify if Battery Strength feature is available */
1723 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1724 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1725 rep->field[i], false);
1727 if (drv->feature_mapping)
1728 drv->feature_mapping(hid, rep->field[i], usage);
1733 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1734 unsigned int application)
1736 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1737 struct input_dev *input_dev = input_allocate_device();
1738 const char *suffix = NULL;
1739 size_t suffix_len, name_len;
1741 if (!hidinput || !input_dev)
1744 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1745 hid->maxapplication > 1) {
1746 switch (application) {
1747 case HID_GD_KEYBOARD:
1748 suffix = "Keyboard";
1759 case HID_DG_TOUCHSCREEN:
1760 suffix = "Touchscreen";
1762 case HID_DG_TOUCHPAD:
1763 suffix = "Touchpad";
1765 case HID_GD_SYSTEM_CONTROL:
1766 suffix = "System Control";
1768 case HID_CP_CONSUMER_CONTROL:
1769 suffix = "Consumer Control";
1771 case HID_GD_WIRELESS_RADIO_CTLS:
1772 suffix = "Wireless Radio Control";
1774 case HID_GD_SYSTEM_MULTIAXIS:
1775 suffix = "System Multi Axis";
1783 name_len = strlen(hid->name);
1784 suffix_len = strlen(suffix);
1785 if ((name_len < suffix_len) ||
1786 strcmp(hid->name + name_len - suffix_len, suffix)) {
1787 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1789 if (!hidinput->name)
1794 input_set_drvdata(input_dev, hid);
1795 input_dev->event = hidinput_input_event;
1796 input_dev->open = hidinput_open;
1797 input_dev->close = hidinput_close;
1798 input_dev->setkeycode = hidinput_setkeycode;
1799 input_dev->getkeycode = hidinput_getkeycode;
1801 input_dev->name = hidinput->name ? hidinput->name : hid->name;
1802 input_dev->phys = hid->phys;
1803 input_dev->uniq = hid->uniq;
1804 input_dev->id.bustype = hid->bus;
1805 input_dev->id.vendor = hid->vendor;
1806 input_dev->id.product = hid->product;
1807 input_dev->id.version = hid->version;
1808 input_dev->dev.parent = &hid->dev;
1810 hidinput->input = input_dev;
1811 hidinput->application = application;
1812 list_add_tail(&hidinput->list, &hid->inputs);
1814 INIT_LIST_HEAD(&hidinput->reports);
1820 input_free_device(input_dev);
1821 hid_err(hid, "Out of memory during hid input probe\n");
1825 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1828 unsigned long r = 0;
1830 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1831 r |= hidinput->input->evbit[i];
1833 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1834 r |= hidinput->input->keybit[i];
1836 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1837 r |= hidinput->input->relbit[i];
1839 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1840 r |= hidinput->input->absbit[i];
1842 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1843 r |= hidinput->input->mscbit[i];
1845 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1846 r |= hidinput->input->ledbit[i];
1848 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1849 r |= hidinput->input->sndbit[i];
1851 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1852 r |= hidinput->input->ffbit[i];
1854 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1855 r |= hidinput->input->swbit[i];
1860 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1861 struct hid_input *hidinput)
1863 struct hid_report *report;
1866 list_del(&hidinput->list);
1867 input_free_device(hidinput->input);
1868 kfree(hidinput->name);
1870 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1871 if (k == HID_OUTPUT_REPORT &&
1872 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1875 list_for_each_entry(report, &hid->report_enum[k].report_list,
1878 for (i = 0; i < report->maxfield; i++)
1879 if (report->field[i]->hidinput == hidinput)
1880 report->field[i]->hidinput = NULL;
1887 static struct hid_input *hidinput_match(struct hid_report *report)
1889 struct hid_device *hid = report->device;
1890 struct hid_input *hidinput;
1892 list_for_each_entry(hidinput, &hid->inputs, list) {
1893 if (hidinput->report &&
1894 hidinput->report->id == report->id)
1901 static struct hid_input *hidinput_match_application(struct hid_report *report)
1903 struct hid_device *hid = report->device;
1904 struct hid_input *hidinput;
1906 list_for_each_entry(hidinput, &hid->inputs, list) {
1907 if (hidinput->application == report->application)
1911 * Keep SystemControl and ConsumerControl applications together
1912 * with the main keyboard, if present.
1914 if ((report->application == HID_GD_SYSTEM_CONTROL ||
1915 report->application == HID_CP_CONSUMER_CONTROL) &&
1916 hidinput->application == HID_GD_KEYBOARD) {
1924 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1925 struct hid_report *report)
1929 for (i = 0; i < report->maxfield; i++)
1930 for (j = 0; j < report->field[i]->maxusage; j++)
1931 hidinput_configure_usage(hidinput, report->field[i],
1932 report->field[i]->usage + j);
1936 * Register the input device; print a message.
1937 * Configure the input layer interface
1938 * Read all reports and initialize the absolute field values.
1941 int hidinput_connect(struct hid_device *hid, unsigned int force)
1943 struct hid_driver *drv = hid->driver;
1944 struct hid_report *report;
1945 struct hid_input *next, *hidinput = NULL;
1946 unsigned int application;
1949 INIT_LIST_HEAD(&hid->inputs);
1950 INIT_WORK(&hid->led_work, hidinput_led_worker);
1952 hid->status &= ~HID_STAT_DUP_DETECTED;
1955 for (i = 0; i < hid->maxcollection; i++) {
1956 struct hid_collection *col = &hid->collection[i];
1957 if (col->type == HID_COLLECTION_APPLICATION ||
1958 col->type == HID_COLLECTION_PHYSICAL)
1959 if (IS_INPUT_APPLICATION(col->usage))
1963 if (i == hid->maxcollection)
1967 report_features(hid);
1969 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1970 if (k == HID_OUTPUT_REPORT &&
1971 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1974 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1976 if (!report->maxfield)
1979 application = report->application;
1982 * Find the previous hidinput report attached
1983 * to this report id.
1985 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1986 hidinput = hidinput_match(report);
1987 else if (hid->maxapplication > 1 &&
1988 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1989 hidinput = hidinput_match_application(report);
1992 hidinput = hidinput_allocate(hid, application);
1997 hidinput_configure_usages(hidinput, report);
1999 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2000 hidinput->report = report;
2002 list_add_tail(&report->hidinput_list,
2003 &hidinput->reports);
2007 hidinput_change_resolution_multipliers(hid);
2009 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2010 if (drv->input_configured &&
2011 drv->input_configured(hid, hidinput))
2014 if (!hidinput_has_been_populated(hidinput)) {
2015 /* no need to register an input device not populated */
2016 hidinput_cleanup_hidinput(hid, hidinput);
2020 if (input_register_device(hidinput->input))
2022 hidinput->registered = true;
2025 if (list_empty(&hid->inputs)) {
2026 hid_err(hid, "No inputs registered, leaving\n");
2030 if (hid->status & HID_STAT_DUP_DETECTED)
2032 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2037 /* unwind the ones we already registered */
2038 hidinput_disconnect(hid);
2042 EXPORT_SYMBOL_GPL(hidinput_connect);
2044 void hidinput_disconnect(struct hid_device *hid)
2046 struct hid_input *hidinput, *next;
2048 hidinput_cleanup_battery(hid);
2050 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2051 list_del(&hidinput->list);
2052 if (hidinput->registered)
2053 input_unregister_device(hidinput->input);
2055 input_free_device(hidinput->input);
2056 kfree(hidinput->name);
2060 /* led_work is spawned by input_dev callbacks, but doesn't access the
2061 * parent input_dev at all. Once all input devices are removed, we
2062 * know that led_work will never get restarted, so we can cancel it
2063 * synchronously and are safe. */
2064 cancel_work_sync(&hid->led_work);
2066 EXPORT_SYMBOL_GPL(hidinput_disconnect);