hiddev.h (6344B) - Raw
1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Copyright (c) 1999-2000 Vojtech Pavlik 4 * 5 * Sponsored by SuSE 6 */ 7 /* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 * Should you need to contact me, the author, you can do so either by 23 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail: 24 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic 25 */ 26 #ifndef _HIDDEV_H 27 #define _HIDDEV_H 28 29 30 31 #include <linux/types.h> 32 33 /* 34 * The event structure itself 35 */ 36 37 struct hiddev_event { 38 unsigned hid; 39 signed int value; 40 }; 41 42 struct hiddev_devinfo { 43 __u32 bustype; 44 __u32 busnum; 45 __u32 devnum; 46 __u32 ifnum; 47 __s16 vendor; 48 __s16 product; 49 __s16 version; 50 __u32 num_applications; 51 }; 52 53 struct hiddev_collection_info { 54 __u32 index; 55 __u32 type; 56 __u32 usage; 57 __u32 level; 58 }; 59 60 #define HID_STRING_SIZE 256 61 struct hiddev_string_descriptor { 62 __s32 index; 63 char value[HID_STRING_SIZE]; 64 }; 65 66 struct hiddev_report_info { 67 __u32 report_type; 68 __u32 report_id; 69 __u32 num_fields; 70 }; 71 72 /* To do a GUSAGE/SUSAGE, fill in at least usage_code, report_type and 73 * report_id. Set report_id to REPORT_ID_UNKNOWN if the rest of the fields 74 * are unknown. Otherwise use a usage_ref struct filled in from a previous 75 * successful GUSAGE call to save time. To actually send a value to the 76 * device, perform a SUSAGE first, followed by a SREPORT. An INITREPORT or a 77 * GREPORT isn't necessary for a GUSAGE to return valid data. 78 */ 79 #define HID_REPORT_ID_UNKNOWN 0xffffffff 80 #define HID_REPORT_ID_FIRST 0x00000100 81 #define HID_REPORT_ID_NEXT 0x00000200 82 #define HID_REPORT_ID_MASK 0x000000ff 83 #define HID_REPORT_ID_MAX 0x000000ff 84 85 #define HID_REPORT_TYPE_INPUT 1 86 #define HID_REPORT_TYPE_OUTPUT 2 87 #define HID_REPORT_TYPE_FEATURE 3 88 #define HID_REPORT_TYPE_MIN 1 89 #define HID_REPORT_TYPE_MAX 3 90 91 struct hiddev_field_info { 92 __u32 report_type; 93 __u32 report_id; 94 __u32 field_index; 95 __u32 maxusage; 96 __u32 flags; 97 __u32 physical; /* physical usage for this field */ 98 __u32 logical; /* logical usage for this field */ 99 __u32 application; /* application usage for this field */ 100 __s32 logical_minimum; 101 __s32 logical_maximum; 102 __s32 physical_minimum; 103 __s32 physical_maximum; 104 __u32 unit_exponent; 105 __u32 unit; 106 }; 107 108 /* Fill in report_type, report_id and field_index to get the information on a 109 * field. 110 */ 111 #define HID_FIELD_CONSTANT 0x001 112 #define HID_FIELD_VARIABLE 0x002 113 #define HID_FIELD_RELATIVE 0x004 114 #define HID_FIELD_WRAP 0x008 115 #define HID_FIELD_NONLINEAR 0x010 116 #define HID_FIELD_NO_PREFERRED 0x020 117 #define HID_FIELD_NULL_STATE 0x040 118 #define HID_FIELD_VOLATILE 0x080 119 #define HID_FIELD_BUFFERED_BYTE 0x100 120 121 struct hiddev_usage_ref { 122 __u32 report_type; 123 __u32 report_id; 124 __u32 field_index; 125 __u32 usage_index; 126 __u32 usage_code; 127 __s32 value; 128 }; 129 130 /* hiddev_usage_ref_multi is used for sending multiple bytes to a control. 131 * It really manifests itself as setting the value of consecutive usages */ 132 #define HID_MAX_MULTI_USAGES 1024 133 struct hiddev_usage_ref_multi { 134 struct hiddev_usage_ref uref; 135 __u32 num_values; 136 __s32 values[HID_MAX_MULTI_USAGES]; 137 }; 138 139 /* FIELD_INDEX_NONE is returned in read() data from the kernel when flags 140 * is set to (HIDDEV_FLAG_UREF | HIDDEV_FLAG_REPORT) and a new report has 141 * been sent by the device 142 */ 143 #define HID_FIELD_INDEX_NONE 0xffffffff 144 145 /* 146 * Protocol version. 147 */ 148 149 #define HID_VERSION 0x010004 150 151 /* 152 * IOCTLs (0x00 - 0x7f) 153 */ 154 155 #define HIDIOCGVERSION _IOR('H', 0x01, int) 156 #define HIDIOCAPPLICATION _IO('H', 0x02) 157 #define HIDIOCGDEVINFO _IOR('H', 0x03, struct hiddev_devinfo) 158 #define HIDIOCGSTRING _IOR('H', 0x04, struct hiddev_string_descriptor) 159 #define HIDIOCINITREPORT _IO('H', 0x05) 160 #define HIDIOCGNAME(len) _IOC(_IOC_READ, 'H', 0x06, len) 161 #define HIDIOCGREPORT _IOW('H', 0x07, struct hiddev_report_info) 162 #define HIDIOCSREPORT _IOW('H', 0x08, struct hiddev_report_info) 163 #define HIDIOCGREPORTINFO _IOWR('H', 0x09, struct hiddev_report_info) 164 #define HIDIOCGFIELDINFO _IOWR('H', 0x0A, struct hiddev_field_info) 165 #define HIDIOCGUSAGE _IOWR('H', 0x0B, struct hiddev_usage_ref) 166 #define HIDIOCSUSAGE _IOW('H', 0x0C, struct hiddev_usage_ref) 167 #define HIDIOCGUCODE _IOWR('H', 0x0D, struct hiddev_usage_ref) 168 #define HIDIOCGFLAG _IOR('H', 0x0E, int) 169 #define HIDIOCSFLAG _IOW('H', 0x0F, int) 170 #define HIDIOCGCOLLECTIONINDEX _IOW('H', 0x10, struct hiddev_usage_ref) 171 #define HIDIOCGCOLLECTIONINFO _IOWR('H', 0x11, struct hiddev_collection_info) 172 #define HIDIOCGPHYS(len) _IOC(_IOC_READ, 'H', 0x12, len) 173 174 /* For writing/reading to multiple/consecutive usages */ 175 #define HIDIOCGUSAGES _IOWR('H', 0x13, struct hiddev_usage_ref_multi) 176 #define HIDIOCSUSAGES _IOW('H', 0x14, struct hiddev_usage_ref_multi) 177 178 /* 179 * Flags to be used in HIDIOCSFLAG 180 */ 181 #define HIDDEV_FLAG_UREF 0x1 182 #define HIDDEV_FLAG_REPORT 0x2 183 #define HIDDEV_FLAGS 0x3 184 185 /* To traverse the input report descriptor info for a HID device, perform the 186 * following: 187 * 188 * rinfo.report_type = HID_REPORT_TYPE_INPUT; 189 * rinfo.report_id = HID_REPORT_ID_FIRST; 190 * ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo); 191 * 192 * while (ret >= 0) { 193 * for (i = 0; i < rinfo.num_fields; i++) { 194 * finfo.report_type = rinfo.report_type; 195 * finfo.report_id = rinfo.report_id; 196 * finfo.field_index = i; 197 * ioctl(fd, HIDIOCGFIELDINFO, &finfo); 198 * for (j = 0; j < finfo.maxusage; j++) { 199 * uref.report_type = rinfo.report_type; 200 * uref.report_id = rinfo.report_id; 201 * uref.field_index = i; 202 * uref.usage_index = j; 203 * ioctl(fd, HIDIOCGUCODE, &uref); 204 * ioctl(fd, HIDIOCGUSAGE, &uref); 205 * } 206 * } 207 * rinfo.report_id |= HID_REPORT_ID_NEXT; 208 * ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo); 209 * } 210 */ 211 212 213 #endif /* _HIDDEV_H */