linux/include/linux/hiddev.h
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   1#ifndef _HIDDEV_H
   2#define _HIDDEV_H
   3
   4/*
   5 *  Copyright (c) 1999-2000 Vojtech Pavlik
   6 *
   7 *  Sponsored by SuSE
   8 */
   9
  10/*
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or 
  14 * (at your option) any later version.
  15 * 
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 * 
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24 * 
  25 * Should you need to contact me, the author, you can do so either by
  26 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  27 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  28 */
  29
  30#include <linux/types.h>
  31
  32/*
  33 * The event structure itself
  34 */
  35
  36struct hiddev_event {
  37        unsigned hid;
  38        signed int value;
  39};
  40
  41struct hiddev_devinfo {
  42        __u32 bustype;
  43        __u32 busnum;
  44        __u32 devnum;
  45        __u32 ifnum;
  46        __s16 vendor;
  47        __s16 product;
  48        __s16 version;
  49        __u32 num_applications;
  50};
  51
  52struct hiddev_collection_info {
  53        __u32 index;
  54        __u32 type;
  55        __u32 usage;
  56        __u32 level;
  57};
  58
  59#define HID_STRING_SIZE 256
  60struct hiddev_string_descriptor {
  61        __s32 index;
  62        char value[HID_STRING_SIZE];
  63};
  64
  65struct hiddev_report_info {
  66        __u32 report_type;
  67        __u32 report_id;
  68        __u32 num_fields;
  69};
  70
  71/* To do a GUSAGE/SUSAGE, fill in at least usage_code,  report_type and 
  72 * report_id.  Set report_id to REPORT_ID_UNKNOWN if the rest of the fields 
  73 * are unknown.  Otherwise use a usage_ref struct filled in from a previous 
  74 * successful GUSAGE call to save time.  To actually send a value to the
  75 * device, perform a SUSAGE first, followed by a SREPORT.  An INITREPORT or a
  76 * GREPORT isn't necessary for a GUSAGE to return valid data.
  77 */
  78#define HID_REPORT_ID_UNKNOWN 0xffffffff
  79#define HID_REPORT_ID_FIRST   0x00000100
  80#define HID_REPORT_ID_NEXT    0x00000200
  81#define HID_REPORT_ID_MASK    0x000000ff
  82#define HID_REPORT_ID_MAX     0x000000ff
  83
  84#define HID_REPORT_TYPE_INPUT   1
  85#define HID_REPORT_TYPE_OUTPUT  2
  86#define HID_REPORT_TYPE_FEATURE 3
  87#define HID_REPORT_TYPE_MIN     1
  88#define HID_REPORT_TYPE_MAX     3
  89
  90struct hiddev_field_info {
  91        __u32 report_type;
  92        __u32 report_id;
  93        __u32 field_index;
  94        __u32 maxusage;
  95        __u32 flags;
  96        __u32 physical;         /* physical usage for this field */
  97        __u32 logical;          /* logical usage for this field */
  98        __u32 application;              /* application usage for this field */
  99        __s32 logical_minimum;
 100        __s32 logical_maximum;
 101        __s32 physical_minimum;
 102        __s32 physical_maximum;
 103        __u32 unit_exponent;
 104        __u32 unit;
 105};
 106
 107/* Fill in report_type, report_id and field_index to get the information on a
 108 * field.
 109 */
 110#define HID_FIELD_CONSTANT              0x001
 111#define HID_FIELD_VARIABLE              0x002
 112#define HID_FIELD_RELATIVE              0x004
 113#define HID_FIELD_WRAP                  0x008   
 114#define HID_FIELD_NONLINEAR             0x010
 115#define HID_FIELD_NO_PREFERRED          0x020
 116#define HID_FIELD_NULL_STATE            0x040
 117#define HID_FIELD_VOLATILE              0x080
 118#define HID_FIELD_BUFFERED_BYTE         0x100
 119
 120struct hiddev_usage_ref {
 121        __u32 report_type;
 122        __u32 report_id;
 123        __u32 field_index;
 124        __u32 usage_index;
 125        __u32 usage_code;
 126        __s32 value;
 127};
 128
 129/* hiddev_usage_ref_multi is used for sending multiple bytes to a control.
 130 * It really manifests itself as setting the value of consecutive usages */
 131#define HID_MAX_MULTI_USAGES 1024
 132struct hiddev_usage_ref_multi {
 133        struct hiddev_usage_ref uref;
 134        __u32 num_values;
 135        __s32 values[HID_MAX_MULTI_USAGES];
 136};
 137
 138/* FIELD_INDEX_NONE is returned in read() data from the kernel when flags
 139 * is set to (HIDDEV_FLAG_UREF | HIDDEV_FLAG_REPORT) and a new report has
 140 * been sent by the device 
 141 */
 142#define HID_FIELD_INDEX_NONE 0xffffffff
 143
 144/*
 145 * Protocol version.
 146 */
 147
 148#define HID_VERSION             0x010004
 149
 150/*
 151 * IOCTLs (0x00 - 0x7f)
 152 */
 153
 154#define HIDIOCGVERSION          _IOR('H', 0x01, int)
 155#define HIDIOCAPPLICATION       _IO('H', 0x02)
 156#define HIDIOCGDEVINFO          _IOR('H', 0x03, struct hiddev_devinfo)
 157#define HIDIOCGSTRING           _IOR('H', 0x04, struct hiddev_string_descriptor)
 158#define HIDIOCINITREPORT        _IO('H', 0x05)
 159#define HIDIOCGNAME(len)        _IOC(_IOC_READ, 'H', 0x06, len)
 160#define HIDIOCGREPORT           _IOW('H', 0x07, struct hiddev_report_info)
 161#define HIDIOCSREPORT           _IOW('H', 0x08, struct hiddev_report_info)
 162#define HIDIOCGREPORTINFO       _IOWR('H', 0x09, struct hiddev_report_info)
 163#define HIDIOCGFIELDINFO        _IOWR('H', 0x0A, struct hiddev_field_info)
 164#define HIDIOCGUSAGE            _IOWR('H', 0x0B, struct hiddev_usage_ref)
 165#define HIDIOCSUSAGE            _IOW('H', 0x0C, struct hiddev_usage_ref)
 166#define HIDIOCGUCODE            _IOWR('H', 0x0D, struct hiddev_usage_ref)
 167#define HIDIOCGFLAG             _IOR('H', 0x0E, int)
 168#define HIDIOCSFLAG             _IOW('H', 0x0F, int)
 169#define HIDIOCGCOLLECTIONINDEX  _IOW('H', 0x10, struct hiddev_usage_ref)
 170#define HIDIOCGCOLLECTIONINFO   _IOWR('H', 0x11, struct hiddev_collection_info)
 171#define HIDIOCGPHYS(len)        _IOC(_IOC_READ, 'H', 0x12, len)
 172
 173/* For writing/reading to multiple/consecutive usages */
 174#define HIDIOCGUSAGES           _IOWR('H', 0x13, struct hiddev_usage_ref_multi)
 175#define HIDIOCSUSAGES           _IOW('H', 0x14, struct hiddev_usage_ref_multi)
 176
 177/* 
 178 * Flags to be used in HIDIOCSFLAG
 179 */
 180#define HIDDEV_FLAG_UREF        0x1
 181#define HIDDEV_FLAG_REPORT      0x2
 182#define HIDDEV_FLAGS            0x3
 183
 184/* To traverse the input report descriptor info for a HID device, perform the 
 185 * following:
 186 *
 187 * rinfo.report_type = HID_REPORT_TYPE_INPUT;
 188 * rinfo.report_id = HID_REPORT_ID_FIRST;
 189 * ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);
 190 *
 191 * while (ret >= 0) {
 192 *      for (i = 0; i < rinfo.num_fields; i++) {
 193 *              finfo.report_type = rinfo.report_type;
 194 *              finfo.report_id = rinfo.report_id;
 195 *              finfo.field_index = i;
 196 *              ioctl(fd, HIDIOCGFIELDINFO, &finfo);
 197 *              for (j = 0; j < finfo.maxusage; j++) {
 198 *                      uref.report_type = rinfo.report_type;
 199 *                      uref.report_id = rinfo.report_id;
 200 *                      uref.field_index = i;
 201 *                      uref.usage_index = j;
 202 *                      ioctl(fd, HIDIOCGUCODE, &uref);
 203 *                      ioctl(fd, HIDIOCGUSAGE, &uref);
 204 *              }
 205 *      }
 206 *      rinfo.report_id |= HID_REPORT_ID_NEXT;
 207 *      ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);
 208 * }
 209 */
 210
 211
 212#ifdef __KERNEL__
 213
 214/*
 215 * In-kernel definitions.
 216 */
 217
 218struct hid_device;
 219struct hid_usage;
 220struct hid_field;
 221struct hid_report;
 222
 223#ifdef CONFIG_USB_HIDDEV
 224int hiddev_connect(struct hid_device *hid, unsigned int force);
 225void hiddev_disconnect(struct hid_device *);
 226void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
 227                      struct hid_usage *usage, __s32 value);
 228void hiddev_report_event(struct hid_device *hid, struct hid_report *report);
 229#else
 230static inline int hiddev_connect(struct hid_device *hid,
 231                unsigned int force)
 232{ return -1; }
 233static inline void hiddev_disconnect(struct hid_device *hid) { }
 234static inline void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
 235                      struct hid_usage *usage, __s32 value) { }
 236static inline void hiddev_report_event(struct hid_device *hid, struct hid_report *report) { }
 237#endif
 238
 239#endif
 240#endif
 241
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