include/linux/hiddev.h

   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
  36 struct hiddev_event {
  37         unsigned hid;
  38         signed int value;
  39 };
  40
  41 struct 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
  52 struct hiddev_collection_info {
  53         __u32 index;
  54         __u32 type;
  55         __u32 usage;
  56         __u32 level;
  57 };
  58
  59 #define HID_STRING_SIZE 256
  60 struct hiddev_string_descriptor {
  61         __s32 index;
  62         char value[HID_STRING_SIZE];
  63 };
  64
  65 struct 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
  90 struct 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
 120 struct 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
 132 struct 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
 218 struct hid_device;
 219 struct hid_usage;
 220 struct hid_field;
 221 struct hid_report;
 222
 223 #ifdef CONFIG_USB_HIDDEV
 224 int hiddev_connect(struct hid_device *hid, unsigned int force);
 225 void hiddev_disconnect(struct hid_device *);
 226 void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
 227                       struct hid_usage *usage, __s32 value);
 228 void hiddev_report_event(struct hid_device *hid, struct hid_report *report);
 229 int __init hiddev_init(void);
 230 void hiddev_exit(void);
 231 #else
 232 static inline int hiddev_connect(struct hid_device *hid,
 233                 unsigned int force)
 234 { return -1; }
 235 static inline void hiddev_disconnect(struct hid_device *hid) { }
 236 static inline void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
 237                       struct hid_usage *usage, __s32 value) { }
 238 static inline void hiddev_report_event(struct hid_device *hid, struct hid_report *report) { }
 239 static inline int hiddev_init(void) { return 0; }
 240 static inline void hiddev_exit(void) { }
 241 #endif
 242
 243 #endif
 244 #endif