Lines Matching +full:value +full:- +full:start
1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8 * Copyright (c) 2006-2012 Jiri Kosina
33 #include <linux/hid-debug.h>
36 #include "hid-ids.h"
49 * Convert a signed n-bit integer to signed 32-bit integer.
52 static s32 snto32(__u32 value, unsigned int n)
54 if (!value || !n)
60 return sign_extend32(value, n - 1);
64 * Convert a signed 32-bit integer to a signed n-bit integer.
67 static u32 s32ton(__s32 value, unsigned int n)
71 if (!value || !n)
77 a = value >> (n - 1);
78 if (a && a != -1)
79 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
80 return value & ((1 << n) - 1);
91 struct hid_report_enum *report_enum = device->report_enum + type;
96 if (report_enum->report_id_hash[id])
97 return report_enum->report_id_hash[id];
104 report_enum->numbered = 1;
106 report->id = id;
107 report->type = type;
108 report->size = 0;
109 report->device = device;
110 report->application = application;
111 report_enum->report_id_hash[id] = report;
113 list_add_tail(&report->list, &report_enum->report_list);
114 INIT_LIST_HEAD(&report->field_entry_list);
128 if (report->maxfield == HID_MAX_FIELDS) {
129 hid_err(report->device, "too many fields in report\n");
139 field->index = report->maxfield++;
140 report->field[field->index] = field;
141 field->usage = (struct hid_usage *)(field + 1);
142 field->value = (s32 *)(field->usage + usages);
143 field->new_value = (s32 *)(field->value + usages);
144 field->usages_priorities = (s32 *)(field->new_value + usages);
145 field->report = report;
160 usage = parser->local.usage[0];
162 if (parser->collection_stack_ptr == parser->collection_stack_size) {
164 unsigned int new_size = parser->collection_stack_size +
167 collection_stack = krealloc(parser->collection_stack,
171 return -ENOMEM;
173 parser->collection_stack = collection_stack;
174 parser->collection_stack_size = new_size;
177 if (parser->device->maxcollection == parser->device->collection_size) {
180 parser->device->collection_size,
184 hid_err(parser->device, "failed to reallocate collection array\n");
185 return -ENOMEM;
187 memcpy(collection, parser->device->collection,
189 parser->device->collection_size);
190 memset(collection + parser->device->collection_size, 0,
192 parser->device->collection_size);
193 kfree(parser->device->collection);
194 parser->device->collection = collection;
195 parser->device->collection_size *= 2;
198 parser->collection_stack[parser->collection_stack_ptr++] =
199 parser->device->maxcollection;
201 collection_index = parser->device->maxcollection++;
202 collection = parser->device->collection + collection_index;
203 collection->type = type;
204 collection->usage = usage;
205 collection->level = parser->collection_stack_ptr - 1;
206 collection->parent_idx = (collection->level == 0) ? -1 :
207 parser->collection_stack[collection->level - 1];
210 parser->device->maxapplication++;
221 if (!parser->collection_stack_ptr) {
222 hid_err(parser->device, "collection stack underflow\n");
223 return -EINVAL;
225 parser->collection_stack_ptr--;
236 struct hid_collection *collection = parser->device->collection;
239 for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
240 unsigned index = parser->collection_stack[n];
254 parser->local.usage[index] &= 0xFFFF;
255 parser->local.usage[index] |=
256 (parser->global.usage_page & 0xFFFF) << 16;
265 if (parser->local.usage_index >= HID_MAX_USAGES) {
266 hid_err(parser->device, "usage index exceeded\n");
267 return -1;
269 parser->local.usage[parser->local.usage_index] = usage;
276 complete_usage(parser, parser->local.usage_index);
278 parser->local.usage_size[parser->local.usage_index] = size;
279 parser->local.collection_index[parser->local.usage_index] =
280 parser->collection_stack_ptr ?
281 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
282 parser->local.usage_index++;
302 report = hid_register_report(parser->device, report_type,
303 parser->global.report_id, application);
305 hid_err(parser->device, "hid_register_report failed\n");
306 return -1;
310 if ((parser->global.logical_minimum < 0 &&
311 parser->global.logical_maximum <
312 parser->global.logical_minimum) ||
313 (parser->global.logical_minimum >= 0 &&
314 (__u32)parser->global.logical_maximum <
315 (__u32)parser->global.logical_minimum)) {
317 parser->global.logical_minimum,
318 parser->global.logical_maximum);
319 return -1;
322 offset = report->size;
323 report->size += parser->global.report_size * parser->global.report_count;
325 if (parser->device->ll_driver->max_buffer_size)
326 max_buffer_size = parser->device->ll_driver->max_buffer_size;
329 if (report->size > (max_buffer_size - 1) << 3) {
330 hid_err(parser->device, "report is too long\n");
331 return -1;
334 if (!parser->local.usage_index) /* Ignore padding fields */
337 usages = max_t(unsigned, parser->local.usage_index,
338 parser->global.report_count);
344 field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
345 field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
346 field->application = application;
351 if (i >= parser->local.usage_index)
352 j = parser->local.usage_index - 1;
353 field->usage[i].hid = parser->local.usage[j];
354 field->usage[i].collection_index =
355 parser->local.collection_index[j];
356 field->usage[i].usage_index = i;
357 field->usage[i].resolution_multiplier = 1;
360 field->maxusage = usages;
361 field->flags = flags;
362 field->report_offset = offset;
363 field->report_type = report_type;
364 field->report_size = parser->global.report_size;
365 field->report_count = parser->global.report_count;
366 field->logical_minimum = parser->global.logical_minimum;
367 field->logical_maximum = parser->global.logical_maximum;
368 field->physical_minimum = parser->global.physical_minimum;
369 field->physical_maximum = parser->global.physical_maximum;
370 field->unit_exponent = parser->global.unit_exponent;
371 field->unit = parser->global.unit;
377 * Read data value from item.
382 switch (item->size) {
383 case 1: return item->data.u8;
384 case 2: return item->data.u16;
385 case 4: return item->data.u32;
392 switch (item->size) {
393 case 1: return item->data.s8;
394 case 2: return item->data.s16;
395 case 4: return item->data.s32;
407 switch (item->tag) {
410 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
411 hid_err(parser->device, "global environment stack overflow\n");
412 return -1;
415 memcpy(parser->global_stack + parser->global_stack_ptr++,
416 &parser->global, sizeof(struct hid_global));
421 if (!parser->global_stack_ptr) {
422 hid_err(parser->device, "global environment stack underflow\n");
423 return -1;
426 memcpy(&parser->global, parser->global_stack +
427 --parser->global_stack_ptr, sizeof(struct hid_global));
431 parser->global.usage_page = item_udata(item);
435 parser->global.logical_minimum = item_sdata(item);
439 if (parser->global.logical_minimum < 0)
440 parser->global.logical_maximum = item_sdata(item);
442 parser->global.logical_maximum = item_udata(item);
446 parser->global.physical_minimum = item_sdata(item);
450 if (parser->global.physical_minimum < 0)
451 parser->global.physical_maximum = item_sdata(item);
453 parser->global.physical_maximum = item_udata(item);
463 parser->global.unit_exponent = snto32(raw_value, 4);
465 parser->global.unit_exponent = raw_value;
469 parser->global.unit = item_udata(item);
473 parser->global.report_size = item_udata(item);
474 if (parser->global.report_size > 256) {
475 hid_err(parser->device, "invalid report_size %d\n",
476 parser->global.report_size);
477 return -1;
482 parser->global.report_count = item_udata(item);
483 if (parser->global.report_count > HID_MAX_USAGES) {
484 hid_err(parser->device, "invalid report_count %d\n",
485 parser->global.report_count);
486 return -1;
491 parser->global.report_id = item_udata(item);
492 if (parser->global.report_id == 0 ||
493 parser->global.report_id >= HID_MAX_IDS) {
494 hid_err(parser->device, "report_id %u is invalid\n",
495 parser->global.report_id);
496 return -1;
501 hid_err(parser->device, "unknown global tag 0x%x\n", item->tag);
502 return -1;
518 switch (item->tag) {
528 if (parser->local.delimiter_depth != 0) {
529 hid_err(parser->device, "nested delimiters\n");
530 return -1;
532 parser->local.delimiter_depth++;
533 parser->local.delimiter_branch++;
535 if (parser->local.delimiter_depth < 1) {
536 hid_err(parser->device, "bogus close delimiter\n");
537 return -1;
539 parser->local.delimiter_depth--;
545 if (parser->local.delimiter_branch > 1) {
550 return hid_add_usage(parser, data, item->size);
554 if (parser->local.delimiter_branch > 1) {
559 parser->local.usage_minimum = data;
564 if (parser->local.delimiter_branch > 1) {
569 count = data - parser->local.usage_minimum;
570 if (count + parser->local.usage_index >= HID_MAX_USAGES) {
573 * actually pre-scanning the device.
575 if (dev_name(&parser->device->dev))
576 hid_warn(parser->device,
578 data = HID_MAX_USAGES - parser->local.usage_index +
579 parser->local.usage_minimum - 1;
581 hid_err(parser->device,
583 return -1;
587 for (n = parser->local.usage_minimum; n <= data; n++)
588 if (hid_add_usage(parser, n, item->size)) {
590 return -1;
596 dbg_hid("unknown local item tag 0x%x\n", item->tag);
606 * usage value."
615 if (!parser->local.usage_index)
618 usage_page = parser->global.usage_page;
624 for (i = parser->local.usage_index - 1; i >= 0; i--) {
625 if (parser->local.usage_size[i] > 2)
629 current_page = parser->local.usage[i] >> 16;
650 switch (item->tag) {
667 if (item->tag >= HID_MAIN_ITEM_TAG_RESERVED_MIN &&
668 item->tag <= HID_MAIN_ITEM_TAG_RESERVED_MAX)
669 hid_warn_ratelimited(parser->device, "reserved main item tag 0x%x\n", item->tag);
671 hid_warn_ratelimited(parser->device, "unknown main item tag 0x%x\n", item->tag);
675 memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */
686 dbg_hid("reserved item type, tag 0x%x\n", item->tag);
691 * Free a report and all registered fields. The field->usage and
692 * field->value table's are allocated behind the field, so we need
700 kfree(report->field_entries);
702 for (n = 0; n < report->maxfield; n++)
703 kvfree(report->field[n]);
716 struct hid_report_enum *report_enum = device->report_enum + i;
719 struct hid_report *report = report_enum->report_id_hash[j];
724 INIT_LIST_HEAD(&report_enum->report_list);
728 * If the HID driver had a rdesc_fixup() callback, dev->rdesc
729 * will be allocated by hid-core and needs to be freed.
733 if (device->rdesc != device->dev_rdesc && device->rdesc != device->bpf_rdesc)
734 kfree(device->rdesc);
735 device->rdesc = NULL;
736 device->rsize = 0;
738 kfree(device->collection);
739 device->collection = NULL;
740 device->collection_size = 0;
741 device->maxcollection = 0;
742 device->maxapplication = 0;
744 device->status &= ~HID_STAT_PARSED;
750 if (hdev->bpf_rdesc != hdev->dev_rdesc)
751 kfree(hdev->bpf_rdesc);
752 hdev->bpf_rdesc = NULL;
765 kfree(hid->dev_rdesc);
773 kref_put(&hid->ref, hiddev_free);
781 static const u8 *fetch_item(const __u8 *start, const __u8 *end, struct hid_item *item)
785 if ((end - start) <= 0)
788 b = *start++;
790 item->type = (b >> 2) & 3;
791 item->tag = (b >> 4) & 15;
793 if (item->tag == HID_ITEM_TAG_LONG) {
795 item->format = HID_ITEM_FORMAT_LONG;
797 if ((end - start) < 2)
800 item->size = *start++;
801 item->tag = *start++;
803 if ((end - start) < item->size)
806 item->data.longdata = start;
807 start += item->size;
808 return start;
811 item->format = HID_ITEM_FORMAT_SHORT;
812 item->size = BIT(b & 3) >> 1; /* 0, 1, 2, 3 -> 0, 1, 2, 4 */
814 if (end - start < item->size)
817 switch (item->size) {
822 item->data.u8 = *start;
826 item->data.u16 = get_unaligned_le16(start);
830 item->data.u32 = get_unaligned_le32(start);
834 return start + item->size;
839 struct hid_device *hid = parser->device;
842 hid->group = HID_GROUP_MULTITOUCH;
847 if (usage == 0xff0000c5 && parser->global.report_count == 256 &&
848 parser->global.report_size == 8)
849 parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8;
851 if (usage == 0xff0000c6 && parser->global.report_count == 1 &&
852 parser->global.report_size == 8)
853 parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8;
858 struct hid_device *hid = parser->device;
861 if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&
864 hid->group = HID_GROUP_SENSOR_HUB;
866 if (hid->vendor == USB_VENDOR_ID_MICROSOFT &&
867 hid->product == USB_DEVICE_ID_MS_POWER_COVER &&
868 hid->group == HID_GROUP_MULTITOUCH)
869 hid->group = HID_GROUP_GENERIC;
871 if ((parser->global.usage_page << 16) == HID_UP_GENDESK)
872 for (i = 0; i < parser->local.usage_index; i++)
873 if (parser->local.usage[i] == HID_GD_POINTER)
874 parser->scan_flags |= HID_SCAN_FLAG_GD_POINTER;
876 if ((parser->global.usage_page << 16) >= HID_UP_MSVENDOR)
877 parser->scan_flags |= HID_SCAN_FLAG_VENDOR_SPECIFIC;
879 if ((parser->global.usage_page << 16) == HID_UP_GOOGLEVENDOR)
880 for (i = 0; i < parser->local.usage_index; i++)
881 if (parser->local.usage[i] ==
883 parser->device->group =
896 switch (item->tag) {
903 /* ignore constant inputs, they will be ignored by hid-input */
906 for (i = 0; i < parser->local.usage_index; i++)
907 hid_scan_input_usage(parser, parser->local.usage[i]);
912 for (i = 0; i < parser->local.usage_index; i++)
913 hid_scan_feature_usage(parser, parser->local.usage[i]);
918 memset(&parser->local, 0, sizeof(parser->local));
931 const __u8 *start = hid->dev_rdesc;
932 const __u8 *end = start + hid->dev_rsize;
943 return -ENOMEM;
945 parser->device = hid;
946 hid->group = HID_GROUP_GENERIC;
949 * In case we are re-scanning after a BPF has been loaded,
952 if (hid->bpf_rdesc && hid->bpf_rsize) {
953 start = hid->bpf_rdesc;
954 end = start + hid->bpf_rsize;
962 while ((start = fetch_item(start, end, &item)) != NULL)
968 if ((parser->scan_flags & HID_SCAN_FLAG_MT_WIN_8) &&
969 (hid->group == HID_GROUP_MULTITOUCH))
970 hid->group = HID_GROUP_MULTITOUCH_WIN_8;
975 switch (hid->vendor) {
977 hid->group = HID_GROUP_WACOM;
980 if (hid->group == HID_GROUP_GENERIC)
981 if ((parser->scan_flags & HID_SCAN_FLAG_VENDOR_SPECIFIC)
982 && (parser->scan_flags & HID_SCAN_FLAG_GD_POINTER))
984 * hid-rmi should take care of them,
985 * not hid-generic
987 hid->group = HID_GROUP_RMI;
991 kfree(parser->collection_stack);
996 * hid_parse_report - parse device report
999 * @start: report start
1005 int hid_parse_report(struct hid_device *hid, const __u8 *start, unsigned size)
1007 hid->dev_rdesc = kmemdup(start, size, GFP_KERNEL);
1008 if (!hid->dev_rdesc)
1009 return -ENOMEM;
1010 hid->dev_rsize = size;
1021 * hid_validate_values - validate existing device report's value indexes
1051 * ->numbered being checked, which may not always be the case when
1060 &hid->report_enum[type].report_list,
1063 report = hid->report_enum[type].report_id_hash[id];
1069 if (report->maxfield <= field_index) {
1074 if (report->field[field_index]->report_count < report_counts) {
1087 __s32 v = *multiplier->value;
1088 __s32 lmin = multiplier->logical_minimum;
1089 __s32 lmax = multiplier->logical_maximum;
1090 __s32 pmin = multiplier->physical_minimum;
1091 __s32 pmax = multiplier->physical_maximum;
1100 if (lmax - lmin == 0)
1106 m = ((v - lmin)/(lmax - lmin) * (pmax - pmin) + pmin);
1107 if (unlikely(multiplier->unit_exponent != 0)) {
1110 multiplier->unit_exponent);
1114 if (unlikely(m == 0 || m > 255 || m < -255)) {
1137 for (i = 0; i < field->maxusage; i++) {
1138 usage = &field->usage[i];
1140 collection = &hid->collection[usage->collection_index];
1141 while (collection->parent_idx != -1 &&
1143 collection = &hid->collection[collection->parent_idx];
1145 if (collection->parent_idx != -1 ||
1147 usage->resolution_multiplier = effective_multiplier;
1180 multiplier_collection = &hid->collection[multiplier->usage->collection_index];
1181 while (multiplier_collection->parent_idx != -1 &&
1182 multiplier_collection->type != HID_COLLECTION_LOGICAL)
1183 multiplier_collection = &hid->collection[multiplier_collection->parent_idx];
1184 if (multiplier_collection->type != HID_COLLECTION_LOGICAL)
1189 rep_enum = &hid->report_enum[HID_INPUT_REPORT];
1190 list_for_each_entry(rep, &rep_enum->report_list, list) {
1191 for (i = 0; i < rep->maxfield; i++) {
1192 field = rep->field[i];
1201 * hid_setup_resolution_multiplier - set up all resolution multipliers
1206 * value to all matching Input items. This only updates the internal struct
1210 * is anything other than 1, the hardware will send pre-multiplied events
1212 * accumulated_value = value * * multiplier
1214 * - "value * multiplier" for each event, or
1215 * - "value" but "multiplier" times as frequently, or
1216 * - a combination of the above
1218 * an accumulated 'value * multiplier'.
1230 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1231 list_for_each_entry(rep, &rep_enum->report_list, list) {
1232 for (i = 0; i < rep->maxfield; i++) {
1234 if (rep->field[i]->report_count < 1)
1237 for (j = 0; j < rep->field[i]->maxusage; j++) {
1238 usage = &rep->field[i]->usage[j];
1239 if (usage->hid == HID_GD_RESOLUTION_MULTIPLIER)
1241 rep->field[i]);
1251 const u8 *start = device->rdesc;
1252 const u8 *end = start + device->rsize;
1264 return -ENOMEM;
1266 parser->device = device;
1268 device->collection = kzalloc_objs(*device->collection,
1270 if (!device->collection)
1271 return -ENOMEM;
1273 device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
1275 device->collection[i].parent_idx = -1;
1277 ret = -EINVAL;
1278 if (start == end) {
1279 hid_err(device, "rejecting 0-sized report descriptor\n");
1283 while ((next = fetch_item(start, end, &item)) != NULL) {
1284 start = next;
1301 if (start != end) {
1303 device->rsize - (unsigned int)(end - start),
1304 device->rsize);
1308 if (parser->collection_stack_ptr) {
1313 if (parser->local.delimiter_depth) {
1324 device->status |= HID_STAT_PARSED;
1328 kfree(parser->collection_stack);
1333 * hid_open_report - open a driver-specific device report
1339 * 0 returned on success, otherwise nonzero error value.
1347 const u8 *start;
1350 if (WARN_ON(device->status & HID_STAT_PARSED))
1351 return -EBUSY;
1353 start = device->bpf_rdesc;
1354 if (WARN_ON(!start))
1355 return -ENODEV;
1356 size = device->bpf_rsize;
1358 if (device->driver->report_fixup) {
1360 * device->driver->report_fixup() needs to work
1364 u8 *buf __free(kfree) = kmemdup(start, size, GFP_KERNEL);
1367 return -ENOMEM;
1369 start = device->driver->report_fixup(device, buf, &size);
1373 * a static read-only memory, but we have no idea if that memory
1376 start = kmemdup(start, size, GFP_KERNEL);
1377 if (!start)
1378 return -ENOMEM;
1381 device->rdesc = start;
1382 device->rsize = size;
1397 * Code sort-of follows HID spec:
1402 * One model of UPS is claimed to report "LINEV" as a 32-bit field.
1403 * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
1411 int bits_to_copy = 8 - bit_shift;
1412 u32 value = 0;
1413 u32 mask = n < 32 ? (1U << n) - 1 : ~0U;
1416 value |= ((u32)report[idx] >> bit_shift) << bit_nr;
1417 n -= bits_to_copy;
1424 return value & mask;
1432 __func__, n, current->comm);
1449 static void __implement(u8 *report, unsigned offset, int n, u32 value)
1453 int bits_to_set = 8 - bit_shift;
1455 while (n - bits_to_set >= 0) {
1457 report[idx] |= value << bit_shift;
1458 value >>= bits_to_set;
1459 n -= bits_to_set;
1467 u8 bit_mask = ((1U << n) - 1);
1469 report[idx] |= value << bit_shift;
1474 unsigned offset, unsigned n, u32 value)
1478 __func__, n, current->comm);
1481 u32 m = (1U << n) - 1;
1483 if (unlikely(value > m)) {
1485 "%s() called with too large value %d (n: %d)! (%s)\n",
1486 __func__, value, n, current->comm);
1487 value &= m;
1491 __implement(report, offset, n, value);
1495 * Search an array for a value.
1498 static int search(__s32 *array, __s32 value, unsigned n)
1500 while (n--) {
1501 if (*array++ == value)
1504 return -1;
1508 * hid_match_report - check if driver's raw_event should be called
1513 * compare hid->driver->report_table->report_type to report->type
1517 const struct hid_report_id *id = hid->driver->report_table;
1522 for (; id->report_type != HID_TERMINATOR; id++)
1523 if (id->report_type == HID_ANY_ID ||
1524 id->report_type == report->type)
1530 * hid_match_usage - check if driver's event should be called
1535 * compare hid->driver->usage_table->usage_{type,code} to
1536 * usage->usage_{type,code}
1540 const struct hid_usage_id *id = hid->driver->usage_table;
1545 for (; id->usage_type != HID_ANY_ID - 1; id++)
1546 if ((id->usage_hid == HID_ANY_ID ||
1547 id->usage_hid == usage->hid) &&
1548 (id->usage_type == HID_ANY_ID ||
1549 id->usage_type == usage->type) &&
1550 (id->usage_code == HID_ANY_ID ||
1551 id->usage_code == usage->code))
1557 struct hid_usage *usage, __s32 value, int interrupt)
1559 struct hid_driver *hdrv = hid->driver;
1562 if (!list_empty(&hid->debug_list))
1563 hid_dump_input(hid, usage, value);
1565 if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
1566 ret = hdrv->event(hid, field, usage, value);
1570 hdrv->name, ret);
1575 if (hid->claimed & HID_CLAIMED_INPUT)
1576 hidinput_hid_event(hid, field, usage, value);
1577 if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
1578 hid->hiddev_hid_event(hid, field, usage, value);
1582 * Checks if the given value is valid within this field
1585 __s32 value)
1587 __s32 min = field->logical_minimum;
1590 * Value needs to be between logical min and max, and
1591 * (value - min) is used as an index in the usage array.
1592 * This array is of size field->maxusage
1594 return value >= min &&
1595 value <= field->logical_maximum &&
1596 value - min < field->maxusage;
1608 unsigned count = field->report_count;
1609 unsigned offset = field->report_offset;
1610 unsigned size = field->report_size;
1611 __s32 min = field->logical_minimum;
1612 __s32 *value;
1614 value = field->new_value;
1615 memset(value, 0, count * sizeof(__s32));
1616 field->ignored = false;
1620 value[n] = min < 0 ?
1626 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
1627 hid_array_value_is_valid(field, value[n]) &&
1628 field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1) {
1629 field->ignored = true;
1643 unsigned int count = field->report_count;
1644 __s32 *value = field->new_value;
1650 &field->usage[n],
1651 value[n],
1654 memcpy(field->value, value, count * sizeof(__s32));
1667 unsigned int count = field->report_count;
1668 __s32 min = field->logical_minimum;
1669 __s32 *value;
1671 value = field->new_value;
1674 if (field->ignored)
1678 if (hid_array_value_is_valid(field, field->value[n]) &&
1679 search(value, field->value[n], count))
1682 &field->usage[field->value[n] - min],
1686 if (hid_array_value_is_valid(field, value[n]) &&
1687 search(field->value, value[n], count))
1690 &field->usage[value[n] - min],
1695 memcpy(field->value, value, count * sizeof(__s32));
1713 for (a = 0; a < report->maxfield; a++)
1714 hid_input_fetch_field(hid, report->field[a], data);
1716 if (!list_empty(&report->field_entry_list)) {
1719 &report->field_entry_list,
1721 field = entry->field;
1723 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1726 &field->usage[entry->index],
1727 field->new_value[entry->index],
1734 for (a = 0; a < report->maxfield; a++) {
1735 field = report->field[a];
1737 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1738 memcpy(field->value, field->new_value,
1739 field->report_count * sizeof(__s32));
1743 for (a = 0; a < report->maxfield; a++) {
1744 field = report->field[a];
1746 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1769 entry->field = field;
1770 entry->index = usage_index;
1771 entry->priority = field->usages_priorities[usage_index];
1775 &report->field_entry_list,
1781 if (entry->priority > next->priority) {
1782 list_add_tail(&entry->list, &next->list);
1788 list_add_tail(&entry->list, &report->field_entry_list);
1800 for (a = 0; a < report->maxfield; a++) {
1801 field = report->field[a];
1803 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1804 count += field->report_count;
1814 report->field_entries = entries;
1818 * store them by priority order in report->field_entry_list
1820 * - Var elements are individualized (field + usage_index)
1821 * - Arrays are taken as one, we can not chose an order for them
1824 for (a = 0; a < report->maxfield; a++) {
1825 field = report->field[a];
1827 if (field->flags & HID_MAIN_ITEM_VARIABLE) {
1828 for (u = 0; u < field->report_count; u++) {
1845 struct hid_report_enum *report_enum = &hid->report_enum[HID_INPUT_REPORT];
1847 list_for_each_entry(report, &report_enum->report_list, list)
1858 unsigned count = field->report_count;
1859 unsigned offset = field->report_offset;
1860 unsigned size = field->report_size;
1864 if (field->logical_minimum < 0) /* signed values */
1866 s32ton(field->value[n], size));
1869 field->value[n]);
1878 if (report->size)
1879 return ((report->size - 1) >> 3) + 1;
1893 if (report->id > 0)
1894 *data++ = report->id;
1897 for (n = 0; n < report->maxfield; n++)
1898 hid_output_field(report->device, report->field[n], data);
1915 u32 len = hid_report_len(report) + 7 + (report->id == 0);
1922 * Set a field value. The report this field belongs to has to be
1923 * created and transferred to the device, to set this value in the
1927 int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
1932 return -1;
1934 size = field->report_size;
1936 hid_dump_input(field->report->device, field->usage + offset, value);
1938 if (offset >= field->report_count) {
1939 hid_err(field->report->device, "offset (%d) exceeds report_count (%d)\n",
1940 offset, field->report_count);
1941 return -1;
1943 if (field->logical_minimum < 0) {
1944 if (value != snto32(s32ton(value, size), size)) {
1945 hid_err(field->report->device, "value %d is out of range\n", value);
1946 return -1;
1949 field->value[offset] = value;
1957 struct list_head *report_list = &hdev->report_enum[report_type].report_list;
1962 if (report->application != application)
1965 for (i = 0; i < report->maxfield; i++) {
1966 struct hid_field *field = report->field[i];
1968 for (j = 0; j < field->maxusage; j++) {
1969 if (field->usage[j].hid == usage)
1986 if (report_enum->numbered)
1989 report = report_enum->report_id_hash[n];
2009 return -ENOMEM;
2014 if (report->id == 0) {
2023 ret = hid_hw_raw_request(hid, report->id, buf, len, report->type, reqtype);
2030 hid_input_report(hid, report->type, buf, ret, 0);
2039 struct hid_report_enum *report_enum = hid->report_enum + type;
2054 report->id, csize, bsize);
2055 return -EINVAL;
2058 if (report_enum->numbered) {
2060 csize--;
2061 bsize--;
2066 if (hid->ll_driver->max_buffer_size)
2067 max_buffer_size = hid->ll_driver->max_buffer_size;
2069 if (report_enum->numbered && rsize >= max_buffer_size)
2070 rsize = max_buffer_size - 1;
2076 report->id, rsize, bsize);
2077 return -EINVAL;
2081 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
2083 memset(cdata + csize, 0, rsize - csize);
2086 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
2087 hid->hiddev_report_event(hid, report);
2088 if (hid->claimed & HID_CLAIMED_HIDRAW) {
2094 if (hid->claimed != HID_CLAIMED_HIDRAW && report->maxfield) {
2096 hdrv = hid->driver;
2097 if (hdrv && hdrv->report)
2098 hdrv->report(hid, report);
2101 if (hid->claimed & HID_CLAIMED_INPUT)
2119 return -ENODEV;
2121 ret = down_trylock(&hid->driver_input_lock);
2123 up(&hid->driver_input_lock);
2124 return -EINVAL;
2126 return -EBUSY;
2129 if (!hid->driver) {
2130 ret = -ENODEV;
2133 report_enum = hid->report_enum + type;
2134 hdrv = hid->driver;
2145 ret = -1;
2150 if (!list_empty(&hid->debug_list))
2156 ret = -1;
2160 if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
2161 ret = hdrv->raw_event(hid, report, data, size);
2170 up(&hid->driver_input_lock);
2175 * hid_input_report - report data from lower layer (usb, bt...)
2196 * hid_safe_input_report - report data from lower layer (usb, bt...)
2207 * here the size of the buffer, allowing hid-core to make smarter decisions
2222 return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
2223 (id->group == HID_GROUP_ANY || id->group == hdev->group) &&
2224 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
2225 (id->product == HID_ANY_ID || id->product == hdev->product);
2231 for (; id->bus; id++)
2259 if (off >= hdev->rsize)
2262 if (off + count > hdev->rsize)
2263 count = hdev->rsize - off;
2265 memcpy(buf, hdev->rdesc + off, count);
2276 return sprintf(buf, "%02x\n", hdev->country & 0xff);
2287 "Multi-Axis Controller"
2299 if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
2301 if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
2303 if (hdev->bus != BUS_USB)
2310 hdev->claimed |= HID_CLAIMED_INPUT;
2312 if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
2313 !hdev->hiddev_connect(hdev,
2315 hdev->claimed |= HID_CLAIMED_HIDDEV;
2317 hdev->claimed |= HID_CLAIMED_HIDRAW;
2320 hdev->claimed |= HID_CLAIMED_DRIVER;
2322 /* Drivers with the ->raw_event callback set are not required to connect
2324 if (!hdev->claimed && !hdev->driver->raw_event) {
2326 return -ENODEV;
2331 if ((hdev->claimed & HID_CLAIMED_INPUT) &&
2332 (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
2333 hdev->ff_init(hdev);
2336 if (hdev->claimed & HID_CLAIMED_INPUT)
2338 if (hdev->claimed & HID_CLAIMED_HIDDEV)
2340 ((struct hiddev *)hdev->hiddev)->minor);
2341 if (hdev->claimed & HID_CLAIMED_HIDRAW)
2343 ((struct hidraw *)hdev->hidraw)->minor);
2346 for (i = 0; i < hdev->maxcollection; i++) {
2347 struct hid_collection *col = &hdev->collection[i];
2348 if (col->type == HID_COLLECTION_APPLICATION &&
2349 (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
2350 (col->usage & 0xffff) < ARRAY_SIZE(types)) {
2351 type = types[col->usage & 0xffff];
2356 switch (hdev->bus) {
2380 ret = device_create_file(&hdev->dev, &dev_attr_country);
2386 buf, bus, hdev->version >> 8, hdev->version & 0xff,
2387 type, hdev->name, hdev->phys);
2395 device_remove_file(&hdev->dev, &dev_attr_country);
2396 if (hdev->claimed & HID_CLAIMED_INPUT)
2398 if (hdev->claimed & HID_CLAIMED_HIDDEV)
2399 hdev->hiddev_disconnect(hdev);
2400 if (hdev->claimed & HID_CLAIMED_HIDRAW)
2402 hdev->claimed = 0;
2409 * hid_hw_start - start underlying HW
2414 * buffers and start the device (if not defeirred to device open).
2421 error = hdev->ll_driver->start(hdev);
2428 hdev->ll_driver->stop(hdev);
2438 * hid_hw_stop - stop underlying HW
2447 hdev->ll_driver->stop(hdev);
2452 * hid_hw_open - signal underlying HW to start delivering events
2455 * Tell underlying HW to start delivering events from the device.
2463 ret = mutex_lock_killable(&hdev->ll_open_lock);
2467 if (!hdev->ll_open_count++) {
2468 ret = hdev->ll_driver->open(hdev);
2470 hdev->ll_open_count--;
2472 if (hdev->driver->on_hid_hw_open)
2473 hdev->driver->on_hid_hw_open(hdev);
2476 mutex_unlock(&hdev->ll_open_lock);
2482 * hid_hw_close - signal underlaying HW to stop delivering events
2492 mutex_lock(&hdev->ll_open_lock);
2493 if (!--hdev->ll_open_count) {
2494 hdev->ll_driver->close(hdev);
2496 if (hdev->driver->on_hid_hw_close)
2497 hdev->driver->on_hid_hw_close(hdev);
2499 mutex_unlock(&hdev->ll_open_lock);
2504 * hid_hw_request - send report request to device
2513 if (hdev->ll_driver->request)
2514 return hdev->ll_driver->request(hdev, report, reqtype);
2529 if (hdev->ll_driver->max_buffer_size)
2530 max_buffer_size = hdev->ll_driver->max_buffer_size;
2533 return -EINVAL;
2540 return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
2545 * hid_hw_raw_request - send report request to device
2572 if (hdev->ll_driver->max_buffer_size)
2573 max_buffer_size = hdev->ll_driver->max_buffer_size;
2576 return -EINVAL;
2582 if (hdev->ll_driver->output_report)
2583 return hdev->ll_driver->output_report(hdev, buf, len);
2585 return -ENOSYS;
2589 * hid_hw_output_report - send output report to device
2606 if (hdev->driver && hdev->driver->suspend)
2607 return hdev->driver->suspend(hdev, state);
2615 if (hdev->driver && hdev->driver->reset_resume)
2616 return hdev->driver->reset_resume(hdev);
2624 if (hdev->driver && hdev->driver->resume)
2625 return hdev->driver->resume(hdev);
2638 * new_id_store - add a new HID device ID to this driver and re-probe devices
2658 return -EINVAL;
2662 return -ENOMEM;
2664 dynid->id.bus = bus;
2665 dynid->id.group = HID_GROUP_ANY;
2666 dynid->id.vendor = vendor;
2667 dynid->id.product = product;
2668 dynid->id.driver_data = driver_data;
2670 spin_lock(&hdrv->dyn_lock);
2671 list_add_tail(&dynid->list, &hdrv->dyn_list);
2672 spin_unlock(&hdrv->dyn_lock);
2674 ret = driver_attach(&hdrv->driver);
2690 spin_lock(&hdrv->dyn_lock);
2691 list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
2692 list_del(&dynid->list);
2695 spin_unlock(&hdrv->dyn_lock);
2703 spin_lock(&hdrv->dyn_lock);
2704 list_for_each_entry(dynid, &hdrv->dyn_list, list) {
2705 if (hid_match_one_id(hdev, &dynid->id)) {
2706 spin_unlock(&hdrv->dyn_lock);
2707 return &dynid->id;
2710 spin_unlock(&hdrv->dyn_lock);
2712 return hid_match_id(hdev, hdrv->id_table);
2725 * hid_compare_device_paths - check if both devices share the same path
2731 * the separator char. Both paths must exist (i.e., zero-length paths
2737 int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
2738 int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
2743 return !strncmp(hdev_a->phys, hdev_b->phys, n1);
2755 if (hdrv->match)
2756 return hdrv->match(hdev, hid_ignore_special_drivers);
2759 * hid-generic implements .match(), so we must be dealing with a
2764 return !hid_ignore_special_drivers && !(hdev->quirks & HID_QUIRK_IGNORE_SPECIAL_DRIVER);
2772 hdev->group = HID_GROUP_GENERIC;
2773 } else if (!hdev->group &&
2774 !(hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)) {
2786 if (!hdev->bpf_rsize) {
2788 const __u8 *original_rdesc = hdev->bpf_rdesc;
2791 original_rdesc = hdev->dev_rdesc;
2797 hdev->bpf_rsize = hdev->dev_rsize;
2800 hdev->bpf_rdesc = call_hid_bpf_rdesc_fixup(hdev, hdev->dev_rdesc,
2801 &hdev->bpf_rsize);
2803 /* the report descriptor changed, we need to re-scan it */
2804 if (original_rdesc != hdev->bpf_rdesc) {
2805 hdev->group = 0;
2811 return -ENODEV;
2813 hdev->devres_group_id = devres_open_group(&hdev->dev, NULL, GFP_KERNEL);
2814 if (!hdev->devres_group_id)
2815 return -ENOMEM;
2818 hdev->quirks = hid_lookup_quirk(hdev);
2819 hdev->driver = hdrv;
2821 if (hdrv->probe) {
2822 ret = hdrv->probe(hdev, id);
2838 devres_release_group(&hdev->dev, hdev->devres_group_id);
2840 hdev->driver = NULL;
2849 struct hid_driver *hdrv = to_hid_driver(dev->driver);
2852 if (down_interruptible(&hdev->driver_input_lock))
2853 return -EINTR;
2855 hdev->io_started = false;
2856 clear_bit(ffs(HID_STAT_REPROBED), &hdev->status);
2858 if (!hdev->driver)
2861 if (!hdev->io_started)
2862 up(&hdev->driver_input_lock);
2872 down(&hdev->driver_input_lock);
2873 hdev->io_started = false;
2875 hdrv = hdev->driver;
2877 if (hdrv->remove)
2878 hdrv->remove(hdev);
2883 devres_release_group(&hdev->dev, hdev->devres_group_id);
2886 hdev->driver = NULL;
2889 if (!hdev->io_started)
2890 up(&hdev->driver_input_lock);
2899 hdev->bus, hdev->group, hdev->vendor, hdev->product);
2922 hdev->bus, hdev->vendor, hdev->product))
2923 return -ENOMEM;
2925 if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
2926 return -ENOMEM;
2928 if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
2929 return -ENOMEM;
2931 if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
2932 return -ENOMEM;
2935 hdev->bus, hdev->group, hdev->vendor, hdev->product))
2936 return -ENOMEM;
2937 if (hdev->firmware_version) {
2939 hdev->firmware_version))
2940 return -ENOMEM;
2962 if (WARN_ON(hdev->status & HID_STAT_ADDED))
2963 return -EBUSY;
2965 hdev->quirks = hid_lookup_quirk(hdev);
2970 return -ENODEV;
2975 if (!hdev->ll_driver->raw_request) {
2977 return -EINVAL;
2982 * for the driver-specific modifications.
2984 ret = hdev->ll_driver->parse(hdev);
2987 if (!hdev->dev_rdesc)
2988 return -ENODEV;
2995 hdev->id = atomic_inc_return(&id);
2999 dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
3000 hdev->vendor, hdev->product, hdev->id);
3002 hid_debug_register(hdev, dev_name(&hdev->dev));
3003 ret = device_add(&hdev->dev);
3005 hdev->status |= HID_STAT_ADDED;
3014 * hid_allocate_device - allocate new hid device descriptor
3020 * error value.
3025 int ret = -ENOMEM;
3031 device_initialize(&hdev->dev);
3032 hdev->dev.release = hid_device_release;
3033 hdev->dev.bus = &hid_bus_type;
3034 device_enable_async_suspend(&hdev->dev);
3038 init_waitqueue_head(&hdev->debug_wait);
3039 INIT_LIST_HEAD(&hdev->debug_list);
3040 spin_lock_init(&hdev->debug_list_lock);
3041 sema_init(&hdev->driver_input_lock, 1);
3042 mutex_init(&hdev->ll_open_lock);
3043 kref_init(&hdev->ref);
3046 INIT_LIST_HEAD(&hdev->batteries);
3063 if (hdev->status & HID_STAT_ADDED) {
3064 device_del(&hdev->dev);
3066 hdev->status &= ~HID_STAT_ADDED;
3069 kfree(hdev->dev_rdesc);
3070 hdev->dev_rdesc = NULL;
3071 hdev->dev_rsize = 0;
3072 hdev->bpf_rsize = 0;
3076 * hid_destroy_device - free previously allocated device
3087 put_device(&hdev->dev);
3097 if (hdev->driver == hdrv &&
3098 !hdrv->match(hdev, hid_ignore_special_drivers) &&
3099 !test_and_set_bit(ffs(HID_STAT_REPROBED), &hdev->status))
3109 if (hdrv->match) {
3127 hdrv->driver.name = hdrv->name;
3128 hdrv->driver.bus = &hid_bus_type;
3129 hdrv->driver.owner = owner;
3130 hdrv->driver.mod_name = mod_name;
3132 INIT_LIST_HEAD(&hdrv->dyn_list);
3133 spin_lock_init(&hdrv->dyn_lock);
3135 ret = driver_register(&hdrv->driver);
3147 driver_unregister(&hdrv->driver);
3159 if (!(hid->claimed & HID_CLAIMED_INPUT))
3162 list_for_each_entry(hidinput, &hid->inputs, list) {
3164 if (hidinput->input->key[i])