LCOV - code coverage report
Current view: top level - lkbce/drivers/hid - hid-core.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 52 870 6.0 %
Date: 2017-01-25 Functions: 3 54 5.6 %

          Line data    Source code
       1             : /*
       2             :  *  HID support for Linux
       3             :  *
       4             :  *  Copyright (c) 1999 Andreas Gal
       5             :  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
       6             :  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
       7             :  *  Copyright (c) 2006-2007 Jiri Kosina
       8             :  */
       9             : 
      10             : /*
      11             :  * This program is free software; you can redistribute it and/or modify it
      12             :  * under the terms of the GNU General Public License as published by the Free
      13             :  * Software Foundation; either version 2 of the License, or (at your option)
      14             :  * any later version.
      15             :  */
      16             : 
      17             : #include <linux/module.h>
      18             : #include <linux/slab.h>
      19             : #include <linux/init.h>
      20             : #include <linux/kernel.h>
      21             : #include <linux/list.h>
      22             : #include <linux/mm.h>
      23             : #include <linux/spinlock.h>
      24             : #include <asm/unaligned.h>
      25             : #include <asm/byteorder.h>
      26             : #include <linux/input.h>
      27             : #include <linux/wait.h>
      28             : #include <linux/vmalloc.h>
      29             : #include <linux/sched.h>
      30             : 
      31             : #include <linux/hid.h>
      32             : #include <linux/hiddev.h>
      33             : #include <linux/hid-debug.h>
      34             : #include <linux/hidraw.h>
      35             : 
      36             : #include "hid-ids.h"
      37             : 
      38             : /*
      39             :  * Version Information
      40             :  */
      41             : 
      42             : #define DRIVER_DESC "HID core driver"
      43             : #define DRIVER_LICENSE "GPL"
      44             : 
      45           1 : int hid_debug = 0;
      46             : module_param_named(debug, hid_debug, int, 0600);
      47             : MODULE_PARM_DESC(debug, "toggle HID debugging messages");
      48             : EXPORT_SYMBOL_GPL(hid_debug);
      49             : 
      50             : /*
      51             :  * Register a new report for a device.
      52             :  */
      53             : 
      54             : static struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
      55             : {
      56           0 :         struct hid_report_enum *report_enum = device->report_enum + type;
      57           0 :         struct hid_report *report;
      58           0 : 
      59           0 :         if (report_enum->report_id_hash[id])
      60           0 :                 return report_enum->report_id_hash[id];
      61             : 
      62           0 :         if (!(report = kzalloc(sizeof(struct hid_report), GFP_KERNEL)))
      63           0 :                 return NULL;
      64             : 
      65           0 :         if (id != 0)
      66           0 :                 report_enum->numbered = 1;
      67             : 
      68           0 :         report->id = id;
      69           0 :         report->type = type;
      70           0 :         report->size = 0;
      71           0 :         report->device = device;
      72           0 :         report_enum->report_id_hash[id] = report;
      73             : 
      74           0 :         list_add_tail(&report->list, &report_enum->report_list);
      75             : 
      76           0 :         return report;
      77             : }
      78             : 
      79             : /*
      80             :  * Register a new field for this report.
      81             :  */
      82             : 
      83             : static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
      84             : {
      85             :         struct hid_field *field;
      86           0 : 
      87           0 :         if (report->maxfield == HID_MAX_FIELDS) {
      88           0 :                 dbg_hid("too many fields in report\n");
      89           0 :                 return NULL;
      90             :         }
      91             : 
      92           0 :         if (!(field = kzalloc(sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
      93           0 :                 + values * sizeof(unsigned), GFP_KERNEL))) return NULL;
      94             : 
      95           0 :         field->index = report->maxfield++;
      96           0 :         report->field[field->index] = field;
      97           0 :         field->usage = (struct hid_usage *)(field + 1);
      98           0 :         field->value = (s32 *)(field->usage + usages);
      99           0 :         field->report = report;
     100             : 
     101           0 :         return field;
     102             : }
     103             : 
     104             : /*
     105             :  * Open a collection. The type/usage is pushed on the stack.
     106             :  */
     107             : 
     108             : static int open_collection(struct hid_parser *parser, unsigned type)
     109             : {
     110           0 :         struct hid_collection *collection;
     111           0 :         unsigned usage;
     112           0 : 
     113           0 :         usage = parser->local.usage[0];
     114           0 : 
     115           0 :         if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
     116           0 :                 dbg_hid("collection stack overflow\n");
     117           0 :                 return -1;
     118             :         }
     119             : 
     120           0 :         if (parser->device->maxcollection == parser->device->collection_size) {
     121           0 :                 collection = kmalloc(sizeof(struct hid_collection) *
     122             :                                 parser->device->collection_size * 2, GFP_KERNEL);
     123           0 :                 if (collection == NULL) {
     124           0 :                         dbg_hid("failed to reallocate collection array\n");
     125           0 :                         return -1;
     126             :                 }
     127           0 :                 memcpy(collection, parser->device->collection,
     128             :                         sizeof(struct hid_collection) *
     129             :                         parser->device->collection_size);
     130           0 :                 memset(collection + parser->device->collection_size, 0,
     131             :                         sizeof(struct hid_collection) *
     132             :                         parser->device->collection_size);
     133           0 :                 kfree(parser->device->collection);
     134           0 :                 parser->device->collection = collection;
     135           0 :                 parser->device->collection_size *= 2;
     136             :         }
     137             : 
     138           0 :         parser->collection_stack[parser->collection_stack_ptr++] =
     139             :                 parser->device->maxcollection;
     140             : 
     141           0 :         collection = parser->device->collection +
     142             :                 parser->device->maxcollection++;
     143           0 :         collection->type = type;
     144           0 :         collection->usage = usage;
     145           0 :         collection->level = parser->collection_stack_ptr - 1;
     146             : 
     147           0 :         if (type == HID_COLLECTION_APPLICATION)
     148           0 :                 parser->device->maxapplication++;
     149             : 
     150           0 :         return 0;
     151             : }
     152             : 
     153             : /*
     154             :  * Close a collection.
     155             :  */
     156             : 
     157             : static int close_collection(struct hid_parser *parser)
     158             : {
     159           0 :         if (!parser->collection_stack_ptr) {
     160           0 :                 dbg_hid("collection stack underflow\n");
     161           0 :                 return -1;
     162             :         }
     163           0 :         parser->collection_stack_ptr--;
     164           0 :         return 0;
     165             : }
     166             : 
     167             : /*
     168             :  * Climb up the stack, search for the specified collection type
     169             :  * and return the usage.
     170             :  */
     171             : 
     172             : static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
     173             : {
     174           0 :         int n;
     175           0 :         for (n = parser->collection_stack_ptr - 1; n >= 0; n--)
     176           0 :                 if (parser->device->collection[parser->collection_stack[n]].type == type)
     177           0 :                         return parser->device->collection[parser->collection_stack[n]].usage;
     178           0 :         return 0; /* we know nothing about this usage type */
     179             : }
     180             : 
     181             : /*
     182             :  * Add a usage to the temporary parser table.
     183             :  */
     184             : 
     185             : static int hid_add_usage(struct hid_parser *parser, unsigned usage)
     186             : {
     187           0 :         if (parser->local.usage_index >= HID_MAX_USAGES) {
     188           0 :                 dbg_hid("usage index exceeded\n");
     189           0 :                 return -1;
     190             :         }
     191           0 :         parser->local.usage[parser->local.usage_index] = usage;
     192           0 :         parser->local.collection_index[parser->local.usage_index] =
     193             :                 parser->collection_stack_ptr ?
     194             :                 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
     195           0 :         parser->local.usage_index++;
     196           0 :         return 0;
     197             : }
     198             : 
     199             : /*
     200             :  * Register a new field for this report.
     201             :  */
     202             : 
     203             : static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
     204             : {
     205           0 :         struct hid_report *report;
     206           0 :         struct hid_field *field;
     207           0 :         int usages;
     208           0 :         unsigned offset;
     209           0 :         int i;
     210           0 : 
     211           0 :         if (!(report = hid_register_report(parser->device, report_type, parser->global.report_id))) {
     212           0 :                 dbg_hid("hid_register_report failed\n");
     213           0 :                 return -1;
     214             :         }
     215             : 
     216           0 :         if (parser->global.logical_maximum < parser->global.logical_minimum) {
     217           0 :                 dbg_hid("logical range invalid %d %d\n", parser->global.logical_minimum, parser->global.logical_maximum);
     218           0 :                 return -1;
     219             :         }
     220             : 
     221           0 :         offset = report->size;
     222           0 :         report->size += parser->global.report_size * parser->global.report_count;
     223             : 
     224           0 :         if (!parser->local.usage_index) /* Ignore padding fields */
     225           0 :                 return 0;
     226             : 
     227           0 :         usages = max_t(int, parser->local.usage_index, parser->global.report_count);
     228             : 
     229           0 :         if ((field = hid_register_field(report, usages, parser->global.report_count)) == NULL)
     230           0 :                 return 0;
     231             : 
     232           0 :         field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
     233           0 :         field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
     234           0 :         field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
     235             : 
     236           0 :         for (i = 0; i < usages; i++) {
     237           0 :                 int j = i;
     238           0 :                 /* Duplicate the last usage we parsed if we have excess values */
     239           0 :                 if (i >= parser->local.usage_index)
     240           0 :                         j = parser->local.usage_index - 1;
     241           0 :                 field->usage[i].hid = parser->local.usage[j];
     242           0 :                 field->usage[i].collection_index =
     243             :                         parser->local.collection_index[j];
     244             :         }
     245             : 
     246           0 :         field->maxusage = usages;
     247           0 :         field->flags = flags;
     248           0 :         field->report_offset = offset;
     249           0 :         field->report_type = report_type;
     250           0 :         field->report_size = parser->global.report_size;
     251           0 :         field->report_count = parser->global.report_count;
     252           0 :         field->logical_minimum = parser->global.logical_minimum;
     253           0 :         field->logical_maximum = parser->global.logical_maximum;
     254           0 :         field->physical_minimum = parser->global.physical_minimum;
     255           0 :         field->physical_maximum = parser->global.physical_maximum;
     256           0 :         field->unit_exponent = parser->global.unit_exponent;
     257           0 :         field->unit = parser->global.unit;
     258             : 
     259           0 :         return 0;
     260             : }
     261             : 
     262             : /*
     263             :  * Read data value from item.
     264             :  */
     265             : 
     266             : static u32 item_udata(struct hid_item *item)
     267             : {
     268           0 :         switch (item->size) {
     269           0 :         case 1: return item->data.u8;
     270           0 :         case 2: return item->data.u16;
     271           0 :         case 4: return item->data.u32;
     272           0 :         }
     273           0 :         return 0;
     274             : }
     275             : 
     276             : static s32 item_sdata(struct hid_item *item)
     277             : {
     278           0 :         switch (item->size) {
     279           0 :         case 1: return item->data.s8;
     280           0 :         case 2: return item->data.s16;
     281           0 :         case 4: return item->data.s32;
     282           0 :         }
     283           0 :         return 0;
     284             : }
     285             : 
     286             : /*
     287             :  * Process a global item.
     288             :  */
     289             : 
     290             : static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
     291             : {
     292           0 :         switch (item->tag) {
     293           0 :         case HID_GLOBAL_ITEM_TAG_PUSH:
     294           0 : 
     295           0 :                 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
     296           0 :                         dbg_hid("global enviroment stack overflow\n");
     297           0 :                         return -1;
     298             :                 }
     299             : 
     300           0 :                 memcpy(parser->global_stack + parser->global_stack_ptr++,
     301             :                         &parser->global, sizeof(struct hid_global));
     302           0 :                 return 0;
     303           0 : 
     304           0 :         case HID_GLOBAL_ITEM_TAG_POP:
     305             : 
     306           0 :                 if (!parser->global_stack_ptr) {
     307           0 :                         dbg_hid("global enviroment stack underflow\n");
     308           0 :                         return -1;
     309             :                 }
     310             : 
     311           0 :                 memcpy(&parser->global, parser->global_stack +
     312             :                         --parser->global_stack_ptr, sizeof(struct hid_global));
     313           0 :                 return 0;
     314           0 : 
     315           0 :         case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
     316           0 :                 parser->global.usage_page = item_udata(item);
     317           0 :                 return 0;
     318           0 : 
     319           0 :         case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
     320           0 :                 parser->global.logical_minimum = item_sdata(item);
     321           0 :                 return 0;
     322           0 : 
     323           0 :         case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
     324           0 :                 if (parser->global.logical_minimum < 0)
     325           0 :                         parser->global.logical_maximum = item_sdata(item);
     326             :                 else
     327           0 :                         parser->global.logical_maximum = item_udata(item);
     328           0 :                 return 0;
     329           0 : 
     330           0 :         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
     331           0 :                 parser->global.physical_minimum = item_sdata(item);
     332           0 :                 return 0;
     333           0 : 
     334           0 :         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
     335           0 :                 if (parser->global.physical_minimum < 0)
     336           0 :                         parser->global.physical_maximum = item_sdata(item);
     337             :                 else
     338           0 :                         parser->global.physical_maximum = item_udata(item);
     339           0 :                 return 0;
     340           0 : 
     341           0 :         case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
     342           0 :                 parser->global.unit_exponent = item_sdata(item);
     343           0 :                 return 0;
     344           0 : 
     345           0 :         case HID_GLOBAL_ITEM_TAG_UNIT:
     346           0 :                 parser->global.unit = item_udata(item);
     347           0 :                 return 0;
     348           0 : 
     349           0 :         case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
     350           0 :                 parser->global.report_size = item_udata(item);
     351           0 :                 if (parser->global.report_size > 32) {
     352           0 :                         dbg_hid("invalid report_size %d\n",
     353             :                                         parser->global.report_size);
     354           0 :                         return -1;
     355             :                 }
     356           0 :                 return 0;
     357           0 : 
     358           0 :         case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
     359           0 :                 parser->global.report_count = item_udata(item);
     360           0 :                 if (parser->global.report_count > HID_MAX_USAGES) {
     361           0 :                         dbg_hid("invalid report_count %d\n",
     362             :                                         parser->global.report_count);
     363           0 :                         return -1;
     364             :                 }
     365           0 :                 return 0;
     366           0 : 
     367           0 :         case HID_GLOBAL_ITEM_TAG_REPORT_ID:
     368           0 :                 parser->global.report_id = item_udata(item);
     369           0 :                 if (parser->global.report_id == 0) {
     370           0 :                         dbg_hid("report_id 0 is invalid\n");
     371           0 :                         return -1;
     372             :                 }
     373           0 :                 return 0;
     374           0 : 
     375           0 :         default:
     376           0 :                 dbg_hid("unknown global tag 0x%x\n", item->tag);
     377           0 :                 return -1;
     378             :         }
     379             : }
     380             : 
     381             : /*
     382             :  * Process a local item.
     383             :  */
     384             : 
     385             : static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
     386             : {
     387           0 :         __u32 data;
     388           0 :         unsigned n;
     389           0 : 
     390           0 :         if (item->size == 0) {
     391           0 :                 dbg_hid("item data expected for local item\n");
     392           0 :                 return -1;
     393             :         }
     394             : 
     395           0 :         data = item_udata(item);
     396             : 
     397             :         switch (item->tag) {
     398           0 :         case HID_LOCAL_ITEM_TAG_DELIMITER:
     399             : 
     400           0 :                 if (data) {
     401             :                         /*
     402             :                          * We treat items before the first delimiter
     403             :                          * as global to all usage sets (branch 0).
     404             :                          * In the moment we process only these global
     405             :                          * items and the first delimiter set.
     406             :                          */
     407           0 :                         if (parser->local.delimiter_depth != 0) {
     408           0 :                                 dbg_hid("nested delimiters\n");
     409           0 :                                 return -1;
     410             :                         }
     411           0 :                         parser->local.delimiter_depth++;
     412           0 :                         parser->local.delimiter_branch++;
     413             :                 } else {
     414           0 :                         if (parser->local.delimiter_depth < 1) {
     415           0 :                                 dbg_hid("bogus close delimiter\n");
     416           0 :                                 return -1;
     417             :                         }
     418           0 :                         parser->local.delimiter_depth--;
     419             :                 }
     420           0 :                 return 1;
     421           0 : 
     422           0 :         case HID_LOCAL_ITEM_TAG_USAGE:
     423             : 
     424           0 :                 if (parser->local.delimiter_branch > 1) {
     425           0 :                         dbg_hid("alternative usage ignored\n");
     426           0 :                         return 0;
     427             :                 }
     428             : 
     429           0 :                 if (item->size <= 2)
     430           0 :                         data = (parser->global.usage_page << 16) + data;
     431             : 
     432           0 :                 return hid_add_usage(parser, data);
     433           0 : 
     434           0 :         case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
     435             : 
     436           0 :                 if (parser->local.delimiter_branch > 1) {
     437           0 :                         dbg_hid("alternative usage ignored\n");
     438           0 :                         return 0;
     439             :                 }
     440             : 
     441           0 :                 if (item->size <= 2)
     442           0 :                         data = (parser->global.usage_page << 16) + data;
     443             : 
     444           0 :                 parser->local.usage_minimum = data;
     445           0 :                 return 0;
     446           0 : 
     447           0 :         case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
     448             : 
     449           0 :                 if (parser->local.delimiter_branch > 1) {
     450           0 :                         dbg_hid("alternative usage ignored\n");
     451           0 :                         return 0;
     452             :                 }
     453             : 
     454           0 :                 if (item->size <= 2)
     455           0 :                         data = (parser->global.usage_page << 16) + data;
     456             : 
     457           0 :                 for (n = parser->local.usage_minimum; n <= data; n++)
     458           0 :                         if (hid_add_usage(parser, n)) {
     459           0 :                                 dbg_hid("hid_add_usage failed\n");
     460           0 :                                 return -1;
     461             :                         }
     462           0 :                 return 0;
     463           0 : 
     464           0 :         default:
     465           0 : 
     466           0 :                 dbg_hid("unknown local item tag 0x%x\n", item->tag);
     467           0 :                 return 0;
     468             :         }
     469             :         return 0;
     470             : }
     471             : 
     472             : /*
     473             :  * Process a main item.
     474             :  */
     475             : 
     476             : static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
     477             : {
     478           0 :         __u32 data;
     479           0 :         int ret;
     480             : 
     481           0 :         data = item_udata(item);
     482             : 
     483             :         switch (item->tag) {
     484           0 :         case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
     485           0 :                 ret = open_collection(parser, data & 0xff);
     486           0 :                 break;
     487           0 :         case HID_MAIN_ITEM_TAG_END_COLLECTION:
     488           0 :                 ret = close_collection(parser);
     489           0 :                 break;
     490           0 :         case HID_MAIN_ITEM_TAG_INPUT:
     491           0 :                 ret = hid_add_field(parser, HID_INPUT_REPORT, data);
     492           0 :                 break;
     493           0 :         case HID_MAIN_ITEM_TAG_OUTPUT:
     494           0 :                 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
     495           0 :                 break;
     496           0 :         case HID_MAIN_ITEM_TAG_FEATURE:
     497           0 :                 ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
     498           0 :                 break;
     499           0 :         default:
     500           0 :                 dbg_hid("unknown main item tag 0x%x\n", item->tag);
     501           0 :                 ret = 0;
     502           0 :         }
     503             : 
     504           0 :         memset(&parser->local, 0, sizeof(parser->local));     /* Reset the local parser environment */
     505             : 
     506           0 :         return ret;
     507             : }
     508             : 
     509             : /*
     510             :  * Process a reserved item.
     511             :  */
     512             : 
     513             : static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
     514             : {
     515           0 :         dbg_hid("reserved item type, tag 0x%x\n", item->tag);
     516           0 :         return 0;
     517             : }
     518             : 
     519             : /*
     520             :  * Free a report and all registered fields. The field->usage and
     521             :  * field->value table's are allocated behind the field, so we need
     522             :  * only to free(field) itself.
     523             :  */
     524             : 
     525             : static void hid_free_report(struct hid_report *report)
     526             : {
     527           0 :         unsigned n;
     528             : 
     529           0 :         for (n = 0; n < report->maxfield; n++)
     530           0 :                 kfree(report->field[n]);
     531           0 :         kfree(report);
     532           0 : }
     533             : 
     534             : /*
     535             :  * Free a device structure, all reports, and all fields.
     536             :  */
     537             : 
     538             : static void hid_device_release(struct device *dev)
     539             : {
     540           0 :         struct hid_device *device = container_of(dev, struct hid_device, dev);
     541           0 :         unsigned i, j;
     542           0 : 
     543           0 :         for (i = 0; i < HID_REPORT_TYPES; i++) {
     544           0 :                 struct hid_report_enum *report_enum = device->report_enum + i;
     545           0 : 
     546           0 :                 for (j = 0; j < 256; j++) {
     547           0 :                         struct hid_report *report = report_enum->report_id_hash[j];
     548           0 :                         if (report)
     549           0 :                                 hid_free_report(report);
     550             :                 }
     551             :         }
     552             : 
     553           0 :         kfree(device->rdesc);
     554           0 :         kfree(device->collection);
     555           0 :         kfree(device);
     556           0 : }
     557             : 
     558             : /*
     559             :  * Fetch a report description item from the data stream. We support long
     560             :  * items, though they are not used yet.
     561             :  */
     562             : 
     563             : static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
     564             : {
     565           0 :         u8 b;
     566           0 : 
     567           0 :         if ((end - start) <= 0)
     568           0 :                 return NULL;
     569           0 : 
     570           0 :         b = *start++;
     571             : 
     572           0 :         item->type = (b >> 2) & 3;
     573           0 :         item->tag  = (b >> 4) & 15;
     574             : 
     575           0 :         if (item->tag == HID_ITEM_TAG_LONG) {
     576             : 
     577           0 :                 item->format = HID_ITEM_FORMAT_LONG;
     578             : 
     579           0 :                 if ((end - start) < 2)
     580           0 :                         return NULL;
     581             : 
     582           0 :                 item->size = *start++;
     583           0 :                 item->tag  = *start++;
     584             : 
     585           0 :                 if ((end - start) < item->size)
     586           0 :                         return NULL;
     587             : 
     588           0 :                 item->data.longdata = start;
     589           0 :                 start += item->size;
     590           0 :                 return start;
     591             :         }
     592             : 
     593           0 :         item->format = HID_ITEM_FORMAT_SHORT;
     594           0 :         item->size = b & 3;
     595             : 
     596           0 :         switch (item->size) {
     597           0 :         case 0:
     598           0 :                 return start;
     599           0 : 
     600           0 :         case 1:
     601           0 :                 if ((end - start) < 1)
     602           0 :                         return NULL;
     603           0 :                 item->data.u8 = *start++;
     604           0 :                 return start;
     605           0 : 
     606           0 :         case 2:
     607           0 :                 if ((end - start) < 2)
     608           0 :                         return NULL;
     609           0 :                 item->data.u16 = get_unaligned_le16(start);
     610           0 :                 start = (__u8 *)((__le16 *)start + 1);
     611           0 :                 return start;
     612           0 : 
     613           0 :         case 3:
     614           0 :                 item->size++;
     615           0 :                 if ((end - start) < 4)
     616           0 :                         return NULL;
     617           0 :                 item->data.u32 = get_unaligned_le32(start);
     618           0 :                 start = (__u8 *)((__le32 *)start + 1);
     619           0 :                 return start;
     620           0 :         }
     621             : 
     622           0 :         return NULL;
     623             : }
     624             : 
     625             : /**
     626             :  * hid_parse_report - parse device report
     627             :  *
     628             :  * @device: hid device
     629             :  * @start: report start
     630             :  * @size: report size
     631             :  *
     632             :  * Parse a report description into a hid_device structure. Reports are
     633             :  * enumerated, fields are attached to these reports.
     634             :  * 0 returned on success, otherwise nonzero error value.
     635             :  */
     636             : int hid_parse_report(struct hid_device *device, __u8 *start,
     637             :                 unsigned size)
     638           0 : {
     639           0 :         struct hid_parser *parser;
     640           0 :         struct hid_item item;
     641           0 :         __u8 *end;
     642           0 :         int ret;
     643           0 :         static int (*dispatch_type[])(struct hid_parser *parser,
     644           0 :                                       struct hid_item *item) = {
     645           0 :                 hid_parser_main,
     646           0 :                 hid_parser_global,
     647             :                 hid_parser_local,
     648             :                 hid_parser_reserved
     649             :         };
     650             : 
     651           0 :         if (device->driver->report_fixup)
     652           0 :                 device->driver->report_fixup(device, start, size);
     653             : 
     654           0 :         device->rdesc = kmalloc(size, GFP_KERNEL);
     655           0 :         if (device->rdesc == NULL)
     656           0 :                 return -ENOMEM;
     657           0 :         memcpy(device->rdesc, start, size);
     658           0 :         device->rsize = size;
     659             : 
     660           0 :         parser = vmalloc(sizeof(struct hid_parser));
     661           0 :         if (!parser) {
     662           0 :                 ret = -ENOMEM;
     663           0 :                 goto err;
     664             :         }
     665             : 
     666           0 :         memset(parser, 0, sizeof(struct hid_parser));
     667           0 :         parser->device = device;
     668             : 
     669           0 :         end = start + size;
     670           0 :         ret = -EINVAL;
     671           0 :         while ((start = fetch_item(start, end, &item)) != NULL) {
     672           0 : 
     673           0 :                 if (item.format != HID_ITEM_FORMAT_SHORT) {
     674           0 :                         dbg_hid("unexpected long global item\n");
     675           0 :                         goto err;
     676             :                 }
     677             : 
     678           0 :                 if (dispatch_type[item.type](parser, &item)) {
     679           0 :                         dbg_hid("item %u %u %u %u parsing failed\n",
     680             :                                 item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag);
     681           0 :                         goto err;
     682             :                 }
     683             : 
     684           0 :                 if (start == end) {
     685           0 :                         if (parser->collection_stack_ptr) {
     686           0 :                                 dbg_hid("unbalanced collection at end of report description\n");
     687           0 :                                 goto err;
     688             :                         }
     689           0 :                         if (parser->local.delimiter_depth) {
     690           0 :                                 dbg_hid("unbalanced delimiter at end of report description\n");
     691           0 :                                 goto err;
     692             :                         }
     693           0 :                         vfree(parser);
     694           0 :                         return 0;
     695             :                 }
     696             :         }
     697             : 
     698           0 :         dbg_hid("item fetching failed at offset %d\n", (int)(end - start));
     699             : err:
     700           0 :         vfree(parser);
     701           0 :         return ret;
     702             : }
     703             : EXPORT_SYMBOL_GPL(hid_parse_report);
     704           0 : 
     705             : /*
     706             :  * Convert a signed n-bit integer to signed 32-bit integer. Common
     707             :  * cases are done through the compiler, the screwed things has to be
     708             :  * done by hand.
     709             :  */
     710             : 
     711             : static s32 snto32(__u32 value, unsigned n)
     712             : {
     713           0 :         switch (n) {
     714           0 :         case 8:  return ((__s8)value);
     715           0 :         case 16: return ((__s16)value);
     716           0 :         case 32: return ((__s32)value);
     717           0 :         }
     718           0 :         return value & (1 << (n - 1)) ? value | (-1 << n) : value;
     719             : }
     720             : 
     721             : /*
     722             :  * Convert a signed 32-bit integer to a signed n-bit integer.
     723             :  */
     724             : 
     725             : static u32 s32ton(__s32 value, unsigned n)
     726             : {
     727           0 :         s32 a = value >> (n - 1);
     728           0 :         if (a && a != -1)
     729           0 :                 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
     730           0 :         return value & ((1 << n) - 1);
     731             : }
     732             : 
     733             : /*
     734             :  * Extract/implement a data field from/to a little endian report (bit array).
     735             :  *
     736             :  * Code sort-of follows HID spec:
     737             :  *     http://www.usb.org/developers/devclass_docs/HID1_11.pdf
     738             :  *
     739             :  * While the USB HID spec allows unlimited length bit fields in "report
     740             :  * descriptors", most devices never use more than 16 bits.
     741             :  * One model of UPS is claimed to report "LINEV" as a 32-bit field.
     742             :  * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
     743             :  */
     744             : 
     745             : static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n)
     746             : {
     747           0 :         u64 x;
     748           0 : 
     749           0 :         if (n > 32)
     750           0 :                 printk(KERN_WARNING "HID: extract() called with n (%d) > 32! (%s)\n",
     751             :                                 n, current->comm);
     752             : 
     753           0 :         report += offset >> 3;  /* adjust byte index */
     754           0 :         offset &= 7;            /* now only need bit offset into one byte */
     755           0 :         x = get_unaligned_le64(report);
     756           0 :         x = (x >> offset) & ((1ULL << n) - 1);  /* extract bit field */
     757           0 :         return (u32) x;
     758             : }
     759             : 
     760             : /*
     761             :  * "implement" : set bits in a little endian bit stream.
     762             :  * Same concepts as "extract" (see comments above).
     763             :  * The data mangled in the bit stream remains in little endian
     764             :  * order the whole time. It make more sense to talk about
     765             :  * endianness of register values by considering a register
     766             :  * a "cached" copy of the little endiad bit stream.
     767             :  */
     768             : static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value)
     769             : {
     770             :         u64 x;
     771           0 :         u64 m = (1ULL << n) - 1;
     772           0 : 
     773           0 :         if (n > 32)
     774           0 :                 printk(KERN_WARNING "HID: implement() called with n (%d) > 32! (%s)\n",
     775           0 :                                 n, current->comm);
     776           0 : 
     777           0 :         if (value > m)
     778           0 :                 printk(KERN_WARNING "HID: implement() called with too large value %d! (%s)\n",
     779             :                                 value, current->comm);
     780           0 :         WARN_ON(value > m);
     781           0 :         value &= m;
     782             : 
     783           0 :         report += offset >> 3;
     784           0 :         offset &= 7;
     785             : 
     786           0 :         x = get_unaligned_le64(report);
     787           0 :         x &= ~(m << offset);
     788           0 :         x |= ((u64)value) << offset;
     789           0 :         put_unaligned_le64(x, report);
     790           0 : }
     791             : 
     792             : /*
     793             :  * Search an array for a value.
     794             :  */
     795             : 
     796             : static __inline__ int search(__s32 *array, __s32 value, unsigned n)
     797             : {
     798           0 :         while (n--) {
     799           0 :                 if (*array++ == value)
     800           0 :                         return 0;
     801             :         }
     802           0 :         return -1;
     803             : }
     804           0 : 
     805             : /**
     806             :  * hid_match_report - check if driver's raw_event should be called
     807             :  *
     808             :  * @hid: hid device
     809             :  * @report_type: type to match against
     810             :  *
     811             :  * compare hid->driver->report_table->report_type to report->type
     812             :  */
     813             : static int hid_match_report(struct hid_device *hid, struct hid_report *report)
     814             : {
     815           0 :         const struct hid_report_id *id = hid->driver->report_table;
     816             : 
     817           0 :         if (!id) /* NULL means all */
     818           0 :                 return 1;
     819             : 
     820           0 :         for (; id->report_type != HID_TERMINATOR; id++)
     821           0 :                 if (id->report_type == HID_ANY_ID ||
     822           0 :                                 id->report_type == report->type)
     823           0 :                         return 1;
     824           0 :         return 0;
     825             : }
     826             : 
     827             : /**
     828             :  * hid_match_usage - check if driver's event should be called
     829             :  *
     830             :  * @hid: hid device
     831             :  * @usage: usage to match against
     832             :  *
     833             :  * compare hid->driver->usage_table->usage_{type,code} to
     834             :  * usage->usage_{type,code}
     835             :  */
     836             : static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
     837             : {
     838           0 :         const struct hid_usage_id *id = hid->driver->usage_table;
     839             : 
     840           0 :         if (!id) /* NULL means all */
     841           0 :                 return 1;
     842             : 
     843           0 :         for (; id->usage_type != HID_ANY_ID - 1; id++)
     844           0 :                 if ((id->usage_hid == HID_ANY_ID ||
     845           0 :                                 id->usage_hid == usage->hid) &&
     846             :                                 (id->usage_type == HID_ANY_ID ||
     847             :                                 id->usage_type == usage->type) &&
     848             :                                 (id->usage_code == HID_ANY_ID ||
     849             :                                  id->usage_code == usage->code))
     850           0 :                         return 1;
     851           0 :         return 0;
     852             : }
     853             : 
     854             : static void hid_process_event(struct hid_device *hid, struct hid_field *field,
     855             :                 struct hid_usage *usage, __s32 value, int interrupt)
     856             : {
     857           0 :         struct hid_driver *hdrv = hid->driver;
     858           0 :         int ret;
     859           0 : 
     860             :         hid_dump_input(hid, usage, value);
     861             : 
     862           0 :         if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
     863           0 :                 ret = hdrv->event(hid, field, usage, value);
     864           0 :                 if (ret != 0) {
     865           0 :                         if (ret < 0)
     866           0 :                                 dbg_hid("%s's event failed with %d\n",
     867             :                                                 hdrv->name, ret);
     868           0 :                         return;
     869             :                 }
     870             :         }
     871             : 
     872           0 :         if (hid->claimed & HID_CLAIMED_INPUT)
     873           0 :                 hidinput_hid_event(hid, field, usage, value);
     874           0 :         if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
     875           0 :                 hid->hiddev_hid_event(hid, field, usage, value);
     876           0 : }
     877             : 
     878             : /*
     879             :  * Analyse a received field, and fetch the data from it. The field
     880             :  * content is stored for next report processing (we do differential
     881             :  * reporting to the layer).
     882             :  */
     883             : 
     884             : static void hid_input_field(struct hid_device *hid, struct hid_field *field,
     885             :                             __u8 *data, int interrupt)
     886             : {
     887           0 :         unsigned n;
     888           0 :         unsigned count = field->report_count;
     889           0 :         unsigned offset = field->report_offset;
     890           0 :         unsigned size = field->report_size;
     891           0 :         __s32 min = field->logical_minimum;
     892           0 :         __s32 max = field->logical_maximum;
     893           0 :         __s32 *value;
     894           0 : 
     895           0 :         if (!(value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC)))
     896           0 :                 return;
     897           0 : 
     898           0 :         for (n = 0; n < count; n++) {
     899           0 : 
     900           0 :                         value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) :
     901             :                                                     extract(data, offset + n * size, size);
     902             : 
     903           0 :                         if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */
     904             :                             && value[n] >= min && value[n] <= max
     905             :                             && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
     906           0 :                                 goto exit;
     907             :         }
     908             : 
     909           0 :         for (n = 0; n < count; n++) {
     910           0 : 
     911           0 :                 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
     912           0 :                         hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
     913           0 :                         continue;
     914             :                 }
     915             : 
     916           0 :                 if (field->value[n] >= min && field->value[n] <= max
     917             :                         && field->usage[field->value[n] - min].hid
     918             :                         && search(value, field->value[n], count))
     919           0 :                                 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
     920             : 
     921           0 :                 if (value[n] >= min && value[n] <= max
     922             :                         && field->usage[value[n] - min].hid
     923             :                         && search(field->value, value[n], count))
     924           0 :                                 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
     925             :         }
     926             : 
     927           0 :         memcpy(field->value, value, count * sizeof(__s32));
     928             : exit:
     929           0 :         kfree(value);
     930           0 : }
     931             : 
     932             : /*
     933           0 :  * Output the field into the report.
     934             :  */
     935             : 
     936             : static void hid_output_field(struct hid_field *field, __u8 *data)
     937             : {
     938           0 :         unsigned count = field->report_count;
     939           0 :         unsigned offset = field->report_offset;
     940           0 :         unsigned size = field->report_size;
     941           0 :         unsigned bitsused = offset + count * size;
     942           0 :         unsigned n;
     943           0 : 
     944             :         /* make sure the unused bits in the last byte are zeros */
     945           0 :         if (count > 0 && size > 0 && (bitsused % 8) != 0)
     946           0 :                 data[(bitsused-1)/8] &= (1 << (bitsused % 8)) - 1;
     947             : 
     948           0 :         for (n = 0; n < count; n++) {
     949           0 :                 if (field->logical_minimum < 0)   /* signed values */
     950           0 :                         implement(data, offset + n * size, size, s32ton(field->value[n], size));
     951             :                 else                            /* unsigned values */
     952           0 :                         implement(data, offset + n * size, size, field->value[n]);
     953             :         }
     954             : }
     955           0 : 
     956             : /*
     957             :  * Create a report.
     958             :  */
     959             : 
     960             : void hid_output_report(struct hid_report *report, __u8 *data)
     961             : {
     962           0 :         unsigned n;
     963           0 : 
     964           0 :         if (report->id > 0)
     965           0 :                 *data++ = report->id;
     966             : 
     967           0 :         for (n = 0; n < report->maxfield; n++)
     968           0 :                 hid_output_field(report->field[n], data);
     969           0 : }
     970             : EXPORT_SYMBOL_GPL(hid_output_report);
     971             : 
     972             : /*
     973             :  * Set a field value. The report this field belongs to has to be
     974           0 :  * created and transferred to the device, to set this value in the
     975             :  * device.
     976             :  */
     977             : 
     978             : int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
     979             : {
     980           0 :         unsigned size = field->report_size;
     981           0 : 
     982           0 :         hid_dump_input(field->report->device, field->usage + offset, value);
     983             : 
     984           0 :         if (offset >= field->report_count) {
     985           0 :                 dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count);
     986           0 :                 return -1;
     987             :         }
     988           0 :         if (field->logical_minimum < 0) {
     989           0 :                 if (value != snto32(s32ton(value, size), size)) {
     990           0 :                         dbg_hid("value %d is out of range\n", value);
     991           0 :                         return -1;
     992             :                 }
     993             :         }
     994           0 :         field->value[offset] = value;
     995           0 :         return 0;
     996             : }
     997             : EXPORT_SYMBOL_GPL(hid_set_field);
     998             : 
     999             : static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
    1000             :                 const u8 *data)
    1001           0 : {
    1002           0 :         struct hid_report *report;
    1003           0 :         unsigned int n = 0;     /* Normally report number is 0 */
    1004             : 
    1005             :         /* Device uses numbered reports, data[0] is report number */
    1006           0 :         if (report_enum->numbered)
    1007           0 :                 n = *data;
    1008             : 
    1009           0 :         report = report_enum->report_id_hash[n];
    1010           0 :         if (report == NULL)
    1011           0 :                 dbg_hid("undefined report_id %u received\n", n);
    1012             : 
    1013           0 :         return report;
    1014             : }
    1015             : 
    1016             : void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
    1017             :                 int interrupt)
    1018             : {
    1019           0 :         struct hid_report_enum *report_enum = hid->report_enum + type;
    1020           0 :         struct hid_report *report;
    1021           0 :         unsigned int a;
    1022           0 :         int rsize, csize = size;
    1023           0 :         u8 *cdata = data;
    1024           0 : 
    1025           0 :         report = hid_get_report(report_enum, data);
    1026           0 :         if (!report)
    1027           0 :                 return;
    1028             : 
    1029           0 :         if (report_enum->numbered) {
    1030           0 :                 cdata++;
    1031           0 :                 csize--;
    1032             :         }
    1033             : 
    1034           0 :         rsize = ((report->size - 1) >> 3) + 1;
    1035             : 
    1036           0 :         if (csize < rsize) {
    1037           0 :                 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
    1038             :                                 csize, rsize);
    1039           0 :                 memset(cdata + csize, 0, rsize - csize);
    1040             :         }
    1041             : 
    1042           0 :         if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
    1043           0 :                 hid->hiddev_report_event(hid, report);
    1044           0 :         if (hid->claimed & HID_CLAIMED_HIDRAW) {
    1045             :                 /* numbered reports need to be passed with the report num */
    1046           0 :                 if (report_enum->numbered)
    1047           0 :                         hidraw_report_event(hid, data - 1, size + 1);
    1048             :                 else
    1049           0 :                         hidraw_report_event(hid, data, size);
    1050             :         }
    1051             : 
    1052           0 :         for (a = 0; a < report->maxfield; a++)
    1053           0 :                 hid_input_field(hid, report->field[a], cdata, interrupt);
    1054           0 : 
    1055           0 :         if (hid->claimed & HID_CLAIMED_INPUT)
    1056           0 :                 hidinput_report_event(hid, report);
    1057           0 : }
    1058             : EXPORT_SYMBOL_GPL(hid_report_raw_event);
    1059             : 
    1060             : /**
    1061             :  * hid_input_report - report data from lower layer (usb, bt...)
    1062             :  *
    1063             :  * @hid: hid device
    1064             :  * @type: HID report type (HID_*_REPORT)
    1065             :  * @data: report contents
    1066             :  * @size: size of data parameter
    1067             :  * @interrupt: distinguish between interrupt and control transfers
    1068             :  *
    1069             :  * This is data entry for lower layers.
    1070             :  */
    1071             : int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
    1072             : {
    1073           0 :         struct hid_report_enum *report_enum;
    1074           0 :         struct hid_driver *hdrv;
    1075           0 :         struct hid_report *report;
    1076           0 :         char *buf;
    1077           0 :         unsigned int i;
    1078           0 :         int ret;
    1079           0 : 
    1080           0 :         if (!hid || !hid->driver)
    1081           0 :                 return -ENODEV;
    1082           0 :         report_enum = hid->report_enum + type;
    1083           0 :         hdrv = hid->driver;
    1084             : 
    1085           0 :         if (!size) {
    1086           0 :                 dbg_hid("empty report\n");
    1087           0 :                 return -1;
    1088             :         }
    1089             : 
    1090           0 :         buf = kmalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_ATOMIC);
    1091             : 
    1092           0 :         if (!buf) {
    1093           0 :                 report = hid_get_report(report_enum, data);
    1094           0 :                 goto nomem;
    1095             :         }
    1096             : 
    1097           0 :         snprintf(buf, HID_DEBUG_BUFSIZE - 1,
    1098             :                         "\nreport (size %u) (%snumbered)\n", size, report_enum->numbered ? "" : "un");
    1099             :         hid_debug_event(hid, buf);
    1100             : 
    1101           0 :         report = hid_get_report(report_enum, data);
    1102           0 :         if (!report) {
    1103           0 :                 kfree(buf);
    1104           0 :                 return -1;
    1105             :         }
    1106             : 
    1107             :         /* dump the report */
    1108           0 :         snprintf(buf, HID_DEBUG_BUFSIZE - 1,
    1109             :                         "report %d (size %u) = ", report->id, size);
    1110             :         hid_debug_event(hid, buf);
    1111           0 :         for (i = 0; i < size; i++) {
    1112           0 :                 snprintf(buf, HID_DEBUG_BUFSIZE - 1,
    1113           0 :                                 " %02x", data[i]);
    1114             :                 hid_debug_event(hid, buf);
    1115             :         }
    1116             :         hid_debug_event(hid, "\n");
    1117             : 
    1118           0 :         kfree(buf);
    1119             : 
    1120           0 : nomem:
    1121           0 :         if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
    1122           0 :                 ret = hdrv->raw_event(hid, report, data, size);
    1123           0 :                 if (ret != 0)
    1124           0 :                         return ret < 0 ? ret : 0;
    1125             :         }
    1126             : 
    1127           0 :         hid_report_raw_event(hid, type, data, size, interrupt);
    1128             : 
    1129           0 :         return 0;
    1130             : }
    1131             : EXPORT_SYMBOL_GPL(hid_input_report);
    1132             : 
    1133             : static bool hid_match_one_id(struct hid_device *hdev,
    1134             :                 const struct hid_device_id *id)
    1135             : {
    1136           0 :         return id->bus == hdev->bus &&
    1137             :                 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
    1138             :                 (id->product == HID_ANY_ID || id->product == hdev->product);
    1139             : }
    1140             : 
    1141             : static const struct hid_device_id *hid_match_id(struct hid_device *hdev,
    1142             :                 const struct hid_device_id *id)
    1143           0 : {
    1144           0 :         for (; id->bus; id++)
    1145           0 :                 if (hid_match_one_id(hdev, id))
    1146           0 :                         return id;
    1147             : 
    1148           0 :         return NULL;
    1149             : }
    1150             : 
    1151           1 : static const struct hid_device_id hid_hiddev_list[] = {
    1152             :         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
    1153             :         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
    1154             :         { }
    1155             : };
    1156             : 
    1157             : static bool hid_hiddev(struct hid_device *hdev)
    1158             : {
    1159           0 :         return !!hid_match_id(hdev, hid_hiddev_list);
    1160             : }
    1161             : 
    1162             : int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
    1163             : {
    1164           0 :         static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
    1165           0 :                 "Joystick", "Gamepad", "Keyboard", "Keypad",
    1166           0 :                 "Multi-Axis Controller"
    1167           0 :         };
    1168           0 :         const char *type, *bus;
    1169           0 :         char buf[64];
    1170           0 :         unsigned int i;
    1171           0 :         int len;
    1172           0 : 
    1173           0 :         if (hdev->bus != BUS_USB)
    1174           0 :                 connect_mask &= ~HID_CONNECT_HIDDEV;
    1175           0 :         if (hid_hiddev(hdev))
    1176           0 :                 connect_mask |= HID_CONNECT_HIDDEV_FORCE;
    1177           0 : 
    1178           0 :         if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
    1179           0 :                                 connect_mask & HID_CONNECT_HIDINPUT_FORCE))
    1180           0 :                 hdev->claimed |= HID_CLAIMED_INPUT;
    1181           0 :         if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
    1182             :                         !hdev->hiddev_connect(hdev,
    1183             :                                 connect_mask & HID_CONNECT_HIDDEV_FORCE))
    1184           0 :                 hdev->claimed |= HID_CLAIMED_HIDDEV;
    1185           0 :         if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
    1186           0 :                 hdev->claimed |= HID_CLAIMED_HIDRAW;
    1187             : 
    1188           0 :         if (!hdev->claimed) {
    1189           0 :                 dev_err(&hdev->dev, "claimed by neither input, hiddev nor "
    1190             :                                 "hidraw\n");
    1191           0 :                 return -ENODEV;
    1192             :         }
    1193             : 
    1194           0 :         if ((hdev->claimed & HID_CLAIMED_INPUT) &&
    1195             :                         (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
    1196           0 :                 hdev->ff_init(hdev);
    1197             : 
    1198           0 :         len = 0;
    1199           0 :         if (hdev->claimed & HID_CLAIMED_INPUT)
    1200           0 :                 len += sprintf(buf + len, "input");
    1201           0 :         if (hdev->claimed & HID_CLAIMED_HIDDEV)
    1202           0 :                 len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
    1203             :                                 hdev->minor);
    1204           0 :         if (hdev->claimed & HID_CLAIMED_HIDRAW)
    1205           0 :                 len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
    1206             :                                 ((struct hidraw *)hdev->hidraw)->minor);
    1207             : 
    1208           0 :         type = "Device";
    1209           0 :         for (i = 0; i < hdev->maxcollection; i++) {
    1210           0 :                 struct hid_collection *col = &hdev->collection[i];
    1211           0 :                 if (col->type == HID_COLLECTION_APPLICATION &&
    1212             :                    (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
    1213             :                    (col->usage & 0xffff) < ARRAY_SIZE(types)) {
    1214           0 :                         type = types[col->usage & 0xffff];
    1215           0 :                         break;
    1216             :                 }
    1217             :         }
    1218             : 
    1219             :         switch (hdev->bus) {
    1220           0 :         case BUS_USB:
    1221           0 :                 bus = "USB";
    1222           0 :                 break;
    1223           0 :         case BUS_BLUETOOTH:
    1224           0 :                 bus = "BLUETOOTH";
    1225           0 :                 break;
    1226           0 :         default:
    1227           0 :                 bus = "<UNKNOWN>";
    1228           0 :         }
    1229             : 
    1230           0 :         dev_info(&hdev->dev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
    1231             :                         buf, bus, hdev->version >> 8, hdev->version & 0xff,
    1232             :                         type, hdev->name, hdev->phys);
    1233             : 
    1234           0 :         return 0;
    1235             : }
    1236             : EXPORT_SYMBOL_GPL(hid_connect);
    1237             : 
    1238             : void hid_disconnect(struct hid_device *hdev)
    1239             : {
    1240           0 :         if (hdev->claimed & HID_CLAIMED_INPUT)
    1241           0 :                 hidinput_disconnect(hdev);
    1242           0 :         if (hdev->claimed & HID_CLAIMED_HIDDEV)
    1243           0 :                 hdev->hiddev_disconnect(hdev);
    1244           0 :         if (hdev->claimed & HID_CLAIMED_HIDRAW)
    1245           0 :                 hidraw_disconnect(hdev);
    1246           0 : }
    1247             : EXPORT_SYMBOL_GPL(hid_disconnect);
    1248             : 
    1249             : /* a list of devices for which there is a specialized driver on HID bus */
    1250           1 : static const struct hid_device_id hid_blacklist[] = {
    1251           1 :         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
    1252             :         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
    1253             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
    1254             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
    1255             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
    1256             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
    1257             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
    1258             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
    1259             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
    1260             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
    1261             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
    1262             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
    1263             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
    1264             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
    1265             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
    1266             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
    1267             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
    1268             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
    1269             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
    1270             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
    1271             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
    1272             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
    1273             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
    1274             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
    1275             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
    1276             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
    1277             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
    1278             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
    1279             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
    1280             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
    1281             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
    1282             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
    1283             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
    1284             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
    1285             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
    1286             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
    1287             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
    1288             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI) },
    1289             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO) },
    1290             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_JIS) },
    1291             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
    1292             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
    1293             :         { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
    1294             :         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
    1295             :         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
    1296             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
    1297             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
    1298             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
    1299             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
    1300             :         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
    1301             :         { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
    1302             :         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
    1303             :         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
    1304             :         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
    1305             :         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
    1306             :         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
    1307             :         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
    1308             :         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
    1309             :         { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
    1310             :         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
    1311             :         { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
    1312             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
    1313             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
    1314             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
    1315             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
    1316             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
    1317             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
    1318             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
    1319             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
    1320             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
    1321             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
    1322             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
    1323             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
    1324             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
    1325             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
    1326             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_FFG ) },
    1327             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
    1328             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
    1329             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
    1330             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
    1331             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
    1332             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
    1333             :         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
    1334             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
    1335             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
    1336             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
    1337             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
    1338             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
    1339             :         { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
    1340             :         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
    1341             :         { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
    1342             :         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
    1343             :         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
    1344             :         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
    1345             :         { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
    1346             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
    1347             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
    1348             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323) },
    1349             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324) },
    1350             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
    1351             :         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
    1352             :         { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
    1353             :         { HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
    1354             :         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
    1355             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
    1356             :         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
    1357             :         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
    1358             : 
    1359             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
    1360             :         { }
    1361             : };
    1362             : 
    1363             : struct hid_dynid {
    1364             :         struct list_head list;
    1365             :         struct hid_device_id id;
    1366             : };
    1367             : 
    1368             : /**
    1369             :  * store_new_id - add a new HID device ID to this driver and re-probe devices
    1370             :  * @driver: target device driver
    1371             :  * @buf: buffer for scanning device ID data
    1372             :  * @count: input size
    1373             :  *
    1374             :  * Adds a new dynamic hid device ID to this driver,
    1375             :  * and causes the driver to probe for all devices again.
    1376             :  */
    1377             : static ssize_t store_new_id(struct device_driver *drv, const char *buf,
    1378             :                 size_t count)
    1379           1 : {
    1380           3 :         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
    1381           1 :         struct hid_dynid *dynid;
    1382           1 :         __u32 bus, vendor, product;
    1383           2 :         unsigned long driver_data = 0;
    1384           1 :         int ret;
    1385           1 : 
    1386           2 :         ret = sscanf(buf, "%x %x %x %lx",
    1387           1 :                         &bus, &vendor, &product, &driver_data);
    1388           3 :         if (ret < 3)
    1389           1 :                 return -EINVAL;
    1390             : 
    1391           3 :         dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
    1392           2 :         if (!dynid)
    1393           1 :                 return -ENOMEM;
    1394             : 
    1395           1 :         dynid->id.bus = bus;
    1396           1 :         dynid->id.vendor = vendor;
    1397           1 :         dynid->id.product = product;
    1398           1 :         dynid->id.driver_data = driver_data;
    1399             : 
    1400           2 :         spin_lock(&hdrv->dyn_lock);
    1401           2 :         list_add_tail(&dynid->list, &hdrv->dyn_list);
    1402           2 :         spin_unlock(&hdrv->dyn_lock);
    1403             : 
    1404           1 :         ret = 0;
    1405           3 :         if (get_driver(&hdrv->driver)) {
    1406           1 :                 ret = driver_attach(&hdrv->driver);
    1407           1 :                 put_driver(&hdrv->driver);
    1408             :         }
    1409             : 
    1410           6 :         return ret ? : count;
    1411             : }
    1412           1 : static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
    1413             : 
    1414             : static void hid_free_dynids(struct hid_driver *hdrv)
    1415             : {
    1416           0 :         struct hid_dynid *dynid, *n;
    1417           0 : 
    1418           0 :         spin_lock(&hdrv->dyn_lock);
    1419           0 :         list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
    1420           0 :                 list_del(&dynid->list);
    1421           0 :                 kfree(dynid);
    1422             :         }
    1423           0 :         spin_unlock(&hdrv->dyn_lock);
    1424           0 : }
    1425             : 
    1426             : static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
    1427             :                 struct hid_driver *hdrv)
    1428           0 : {
    1429           0 :         struct hid_dynid *dynid;
    1430           0 : 
    1431           0 :         spin_lock(&hdrv->dyn_lock);
    1432           0 :         list_for_each_entry(dynid, &hdrv->dyn_list, list) {
    1433           0 :                 if (hid_match_one_id(hdev, &dynid->id)) {
    1434           0 :                         spin_unlock(&hdrv->dyn_lock);
    1435           0 :                         return &dynid->id;
    1436             :                 }
    1437             :         }
    1438           0 :         spin_unlock(&hdrv->dyn_lock);
    1439             : 
    1440           0 :         return hid_match_id(hdev, hdrv->id_table);
    1441             : }
    1442             : 
    1443             : static int hid_bus_match(struct device *dev, struct device_driver *drv)
    1444             : {
    1445           0 :         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
    1446           0 :         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
    1447           0 : 
    1448           0 :         if (!hid_match_device(hdev, hdrv))
    1449           0 :                 return 0;
    1450           0 : 
    1451           0 :         /* generic wants all non-blacklisted */
    1452           0 :         if (!strncmp(hdrv->name, "generic-", 8))
    1453           0 :                 return !hid_match_id(hdev, hid_blacklist);
    1454             : 
    1455           0 :         return 1;
    1456             : }
    1457             : 
    1458             : static int hid_device_probe(struct device *dev)
    1459             : {
    1460           0 :         struct hid_driver *hdrv = container_of(dev->driver,
    1461           0 :                         struct hid_driver, driver);
    1462           0 :         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
    1463           0 :         const struct hid_device_id *id;
    1464           0 :         int ret = 0;
    1465           0 : 
    1466           0 :         if (!hdev->driver) {
    1467           0 :                 id = hid_match_device(hdev, hdrv);
    1468           0 :                 if (id == NULL)
    1469           0 :                         return -ENODEV;
    1470             : 
    1471           0 :                 hdev->driver = hdrv;
    1472           0 :                 if (hdrv->probe) {
    1473           0 :                         ret = hdrv->probe(hdev, id);
    1474             :                 } else { /* default probe */
    1475           0 :                         ret = hid_parse(hdev);
    1476           0 :                         if (!ret)
    1477           0 :                                 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
    1478             :                 }
    1479           0 :                 if (ret)
    1480           0 :                         hdev->driver = NULL;
    1481             :         }
    1482           0 :         return ret;
    1483             : }
    1484             : 
    1485             : static int hid_device_remove(struct device *dev)
    1486             : {
    1487           0 :         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
    1488           0 :         struct hid_driver *hdrv = hdev->driver;
    1489           0 : 
    1490           0 :         if (hdrv) {
    1491           0 :                 if (hdrv->remove)
    1492           0 :                         hdrv->remove(hdev);
    1493             :                 else /* default remove */
    1494           0 :                         hid_hw_stop(hdev);
    1495           0 :                 hdev->driver = NULL;
    1496             :         }
    1497             : 
    1498           0 :         return 0;
    1499             : }
    1500             : 
    1501             : static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
    1502             : {
    1503           0 :         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
    1504           0 : 
    1505           0 :         if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
    1506           0 :                         hdev->bus, hdev->vendor, hdev->product))
    1507           0 :                 return -ENOMEM;
    1508           0 : 
    1509           0 :         if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
    1510           0 :                 return -ENOMEM;
    1511             : 
    1512           0 :         if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
    1513           0 :                 return -ENOMEM;
    1514             : 
    1515           0 :         if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
    1516           0 :                 return -ENOMEM;
    1517             : 
    1518           0 :         if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X",
    1519             :                         hdev->bus, hdev->vendor, hdev->product))
    1520           0 :                 return -ENOMEM;
    1521             : 
    1522           0 :         return 0;
    1523             : }
    1524             : 
    1525           1 : static struct bus_type hid_bus_type = {
    1526             :         .name           = "hid",
    1527             :         .match          = hid_bus_match,
    1528             :         .probe          = hid_device_probe,
    1529             :         .remove         = hid_device_remove,
    1530             :         .uevent         = hid_uevent,
    1531             : };
    1532             : 
    1533             : /* a list of devices that shouldn't be handled by HID core at all */
    1534           1 : static const struct hid_device_id hid_ignore_list[] = {
    1535             :         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
    1536             :         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
    1537             :         { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
    1538             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
    1539             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
    1540             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
    1541             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
    1542             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
    1543             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
    1544             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
    1545             :         { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
    1546             :         { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
    1547             :         { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)},
    1548             :         { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2)},
    1549             :         { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
    1550             :         { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
    1551             :         { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
    1552             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
    1553             :         { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
    1554             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
    1555             :         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
    1556             :         { HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
    1557             :         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
    1558             :         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
    1559             :         { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
    1560             :         { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
    1561             :         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) },
    1562             :         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
    1563             :         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) },
    1564             :         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
    1565             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
    1566             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
    1567             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
    1568             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
    1569             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
    1570             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
    1571             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
    1572             :         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
    1573             :         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
    1574             :         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
    1575             :         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
    1576             :         { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
    1577             :         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
    1578             :         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
    1579             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
    1580             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
    1581             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
    1582             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
    1583             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
    1584             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
    1585             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
    1586             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
    1587             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
    1588             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
    1589             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
    1590             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
    1591             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
    1592             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
    1593             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
    1594             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
    1595             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
    1596             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
    1597             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
    1598             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
    1599             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
    1600             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
    1601             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
    1602             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
    1603             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
    1604             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
    1605             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
    1606             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
    1607             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
    1608             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
    1609             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
    1610             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
    1611             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
    1612             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
    1613             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
    1614             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
    1615             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
    1616             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
    1617             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
    1618             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
    1619             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
    1620             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
    1621             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
    1622             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
    1623             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
    1624             :         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
    1625             :         { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
    1626             :         { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
    1627             :         { HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
    1628             :         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
    1629             :         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_KYE, 0x0058) },
    1630             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
    1631             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
    1632             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
    1633             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
    1634             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
    1635             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
    1636             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY1) },
    1637             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
    1638             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
    1639             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
    1640             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
    1641             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
    1642             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
    1643             :         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
    1644             :         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
    1645             :         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
    1646             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
    1647             :         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
    1648             :         { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
    1649             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
    1650             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
    1651             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
    1652             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
    1653             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
    1654             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
    1655             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
    1656             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
    1657             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
    1658             :         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
    1659             :         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
    1660             :         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
    1661             :         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
    1662             :         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
    1663             :         { HID_USB_DEVICE(USB_VENDOR_ID_PHILIPS, USB_DEVICE_ID_PHILIPS_IEEE802154_DONGLE) },
    1664             :         { HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
    1665             :         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
    1666             :         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
    1667             :         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
    1668             :         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
    1669             :         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
    1670             :         { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
    1671             :         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
    1672             :         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
    1673             :         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
    1674             :         { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
    1675             :         { }
    1676             : };
    1677             : 
    1678             : /**
    1679             :  * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
    1680             :  *
    1681             :  * There are composite devices for which we want to ignore only a certain
    1682             :  * interface. This is a list of devices for which only the mouse interface will
    1683             :  * be ignored. This allows a dedicated driver to take care of the interface.
    1684             :  */
    1685           1 : static const struct hid_device_id hid_mouse_ignore_list[] = {
    1686             :         /* appletouch driver */
    1687             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
    1688             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
    1689             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
    1690             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
    1691             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
    1692             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
    1693             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
    1694             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
    1695             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
    1696             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
    1697             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
    1698             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
    1699             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
    1700             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
    1701             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
    1702             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
    1703             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
    1704             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
    1705             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
    1706             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
    1707             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
    1708             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
    1709             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
    1710             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
    1711             :         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
    1712             :         { }
    1713             : };
    1714             : 
    1715             : static bool hid_ignore(struct hid_device *hdev)
    1716             : {
    1717           0 :         switch (hdev->vendor) {
    1718           0 :         case USB_VENDOR_ID_CODEMERCS:
    1719             :                 /* ignore all Code Mercenaries IOWarrior devices */
    1720           0 :                 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
    1721             :                                 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
    1722           0 :                         return true;
    1723           0 :                 break;
    1724           0 :         case USB_VENDOR_ID_LOGITECH:
    1725           0 :                 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
    1726             :                                 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
    1727           0 :                         return true;
    1728           0 :                 break;
    1729           0 :         case USB_VENDOR_ID_SOUNDGRAPH:
    1730           0 :                 if (hdev->product >= USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST &&
    1731             :                     hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
    1732           0 :                         return true;
    1733           0 :                 break;
    1734           0 :         }
    1735             : 
    1736           0 :         if (hdev->type == HID_TYPE_USBMOUSE &&
    1737             :                         hid_match_id(hdev, hid_mouse_ignore_list))
    1738           0 :                 return true;
    1739             : 
    1740           0 :         return !!hid_match_id(hdev, hid_ignore_list);
    1741             : }
    1742             : 
    1743             : int hid_add_device(struct hid_device *hdev)
    1744             : {
    1745           0 :         static atomic_t id = ATOMIC_INIT(0);
    1746           0 :         int ret;
    1747           0 : 
    1748           0 :         if (WARN_ON(hdev->status & HID_STAT_ADDED))
    1749           0 :                 return -EBUSY;
    1750           0 : 
    1751           0 :         /* we need to kill them here, otherwise they will stay allocated to
    1752             :          * wait for coming driver */
    1753           0 :         if (hid_ignore(hdev))
    1754           0 :                 return -ENODEV;
    1755             : 
    1756             :         /* XXX hack, any other cleaner solution after the driver core
    1757             :          * is converted to allow more than 20 bytes as the device name? */
    1758           0 :         dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
    1759             :                      hdev->vendor, hdev->product, atomic_inc_return(&id));
    1760             : 
    1761           0 :         ret = device_add(&hdev->dev);
    1762           0 :         if (!ret)
    1763           0 :                 hdev->status |= HID_STAT_ADDED;
    1764             : 
    1765             :         hid_debug_register(hdev, dev_name(&hdev->dev));
    1766             : 
    1767           0 :         return ret;
    1768             : }
    1769             : EXPORT_SYMBOL_GPL(hid_add_device);
    1770             : 
    1771             : /**
    1772             :  * hid_allocate_device - allocate new hid device descriptor
    1773             :  *
    1774             :  * Allocate and initialize hid device, so that hid_destroy_device might be
    1775             :  * used to free it.
    1776             :  *
    1777             :  * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
    1778             :  * error value.
    1779             :  */
    1780             : struct hid_device *hid_allocate_device(void)
    1781             : {
    1782           0 :         struct hid_device *hdev;
    1783           0 :         unsigned int i;
    1784           0 :         int ret = -ENOMEM;
    1785           0 : 
    1786           0 :         hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
    1787           0 :         if (hdev == NULL)
    1788           0 :                 return ERR_PTR(ret);
    1789           0 : 
    1790           0 :         device_initialize(&hdev->dev);
    1791           0 :         hdev->dev.release = hid_device_release;
    1792           0 :         hdev->dev.bus = &hid_bus_type;
    1793             : 
    1794           0 :         hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
    1795             :                         sizeof(struct hid_collection), GFP_KERNEL);
    1796           0 :         if (hdev->collection == NULL)
    1797           0 :                 goto err;
    1798           0 :         hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
    1799             : 
    1800           0 :         for (i = 0; i < HID_REPORT_TYPES; i++)
    1801           0 :                 INIT_LIST_HEAD(&hdev->report_enum[i].report_list);
    1802           0 : 
    1803           0 :         init_waitqueue_head(&hdev->debug_wait);
    1804           0 :         INIT_LIST_HEAD(&hdev->debug_list);
    1805             : 
    1806           0 :         return hdev;
    1807           0 : err:
    1808           0 :         put_device(&hdev->dev);
    1809           0 :         return ERR_PTR(ret);
    1810             : }
    1811             : EXPORT_SYMBOL_GPL(hid_allocate_device);
    1812             : 
    1813             : static void hid_remove_device(struct hid_device *hdev)
    1814             : {
    1815           0 :         if (hdev->status & HID_STAT_ADDED) {
    1816           0 :                 device_del(&hdev->dev);
    1817             :                 hid_debug_unregister(hdev);
    1818           0 :                 hdev->status &= ~HID_STAT_ADDED;
    1819             :         }
    1820           0 : }
    1821             : 
    1822             : /**
    1823             :  * hid_destroy_device - free previously allocated device
    1824             :  *
    1825             :  * @hdev: hid device
    1826             :  *
    1827             :  * If you allocate hid_device through hid_allocate_device, you should ever
    1828             :  * free by this function.
    1829             :  */
    1830             : void hid_destroy_device(struct hid_device *hdev)
    1831             : {
    1832           0 :         hid_remove_device(hdev);
    1833           0 :         put_device(&hdev->dev);
    1834           0 : }
    1835             : EXPORT_SYMBOL_GPL(hid_destroy_device);
    1836             : 
    1837             : int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
    1838             :                 const char *mod_name)
    1839           0 : {
    1840           0 :         int ret;
    1841             : 
    1842           0 :         hdrv->driver.name = hdrv->name;
    1843           0 :         hdrv->driver.bus = &hid_bus_type;
    1844           0 :         hdrv->driver.owner = owner;
    1845           0 :         hdrv->driver.mod_name = mod_name;
    1846             : 
    1847           0 :         INIT_LIST_HEAD(&hdrv->dyn_list);
    1848           0 :         spin_lock_init(&hdrv->dyn_lock);
    1849             : 
    1850           0 :         ret = driver_register(&hdrv->driver);
    1851           0 :         if (ret)
    1852           0 :                 return ret;
    1853             : 
    1854           0 :         ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
    1855           0 :         if (ret)
    1856           0 :                 driver_unregister(&hdrv->driver);
    1857             : 
    1858           0 :         return ret;
    1859             : }
    1860             : EXPORT_SYMBOL_GPL(__hid_register_driver);
    1861             : 
    1862             : void hid_unregister_driver(struct hid_driver *hdrv)
    1863             : {
    1864           0 :         driver_remove_file(&hdrv->driver, &driver_attr_new_id);
    1865           0 :         driver_unregister(&hdrv->driver);
    1866           0 :         hid_free_dynids(hdrv);
    1867           0 : }
    1868             : EXPORT_SYMBOL_GPL(hid_unregister_driver);
    1869             : 
    1870             : int hid_check_keys_pressed(struct hid_device *hid)
    1871             : {
    1872           0 :         struct hid_input *hidinput;
    1873           0 :         int i;
    1874           0 : 
    1875           0 :         if (!(hid->claimed & HID_CLAIMED_INPUT))
    1876           0 :                 return 0;
    1877             : 
    1878           0 :         list_for_each_entry(hidinput, &hid->inputs, list) {
    1879           0 :                 for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
    1880           0 :                         if (hidinput->input->key[i])
    1881           0 :                                 return 1;
    1882             :         }
    1883             : 
    1884           0 :         return 0;
    1885             : }
    1886             : 
    1887             : EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
    1888             : 
    1889             : static int __init hid_init(void)
    1890             : {
    1891           1 :         int ret;
    1892             : 
    1893           2 :         if (hid_debug)
    1894           1 :                 printk(KERN_WARNING "HID: hid_debug is now used solely for parser and driver debugging.\n"
    1895             :                                 "HID: debugfs is now used for inspecting the device (report descriptor, reports)\n");
    1896             : 
    1897           1 :         ret = bus_register(&hid_bus_type);
    1898           2 :         if (ret) {
    1899           1 :                 printk(KERN_ERR "HID: can't register hid bus\n");
    1900           1 :                 goto err;
    1901             :         }
    1902             : 
    1903           2 :         ret = hidraw_init();
    1904           2 :         if (ret)
    1905           1 :                 goto err_bus;
    1906             : 
    1907             :         hid_debug_init();
    1908             : 
    1909           1 :         return 0;
    1910           1 : err_bus:
    1911           1 :         bus_unregister(&hid_bus_type);
    1912             : err:
    1913           3 :         return ret;
    1914             : }
    1915             : 
    1916             : static void __exit hid_exit(void)
    1917             : {
    1918             :         hid_debug_exit();
    1919           4 :         hidraw_exit();
    1920           2 :         bus_unregister(&hid_bus_type);
    1921           2 : }
    1922             : 
    1923             : module_init(hid_init);
    1924             : module_exit(hid_exit);
    1925           1 : 
    1926             : MODULE_AUTHOR("Andreas Gal");
    1927             : MODULE_AUTHOR("Vojtech Pavlik");
    1928             : MODULE_AUTHOR("Jiri Kosina");
    1929             : MODULE_LICENSE(DRIVER_LICENSE);
    1930             : 

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