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hiddev.h
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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * Copyright (c) 1999-2000 Vojtech Pavlik * * Sponsored by SuSE */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */ #ifndef _HIDDEV_H #define _HIDDEV_H #include <linux/types.h> /* * The event structure itself */ struct hiddev_event { unsigned hid; signed int value; }; struct hiddev_devinfo { __u32 bustype; __u32 busnum; __u32 devnum; __u32 ifnum; __s16 vendor; __s16 product; __s16 version; __u32 num_applications; }; struct hiddev_collection_info { __u32 index; __u32 type; __u32 usage; __u32 level; }; #define HID_STRING_SIZE 256 struct hiddev_string_descriptor { __s32 index; char value[HID_STRING_SIZE]; }; struct hiddev_report_info { __u32 report_type; __u32 report_id; __u32 num_fields; }; /* To do a GUSAGE/SUSAGE, fill in at least usage_code, report_type and * report_id. Set report_id to REPORT_ID_UNKNOWN if the rest of the fields * are unknown. Otherwise use a usage_ref struct filled in from a previous * successful GUSAGE call to save time. To actually send a value to the * device, perform a SUSAGE first, followed by a SREPORT. An INITREPORT or a * GREPORT isn't necessary for a GUSAGE to return valid data. */ #define HID_REPORT_ID_UNKNOWN 0xffffffff #define HID_REPORT_ID_FIRST 0x00000100 #define HID_REPORT_ID_NEXT 0x00000200 #define HID_REPORT_ID_MASK 0x000000ff #define HID_REPORT_ID_MAX 0x000000ff #define HID_REPORT_TYPE_INPUT 1 #define HID_REPORT_TYPE_OUTPUT 2 #define HID_REPORT_TYPE_FEATURE 3 #define HID_REPORT_TYPE_MIN 1 #define HID_REPORT_TYPE_MAX 3 struct hiddev_field_info { __u32 report_type; __u32 report_id; __u32 field_index; __u32 maxusage; __u32 flags; __u32 physical; /* physical usage for this field */ __u32 logical; /* logical usage for this field */ __u32 application; /* application usage for this field */ __s32 logical_minimum; __s32 logical_maximum; __s32 physical_minimum; __s32 physical_maximum; __u32 unit_exponent; __u32 unit; }; /* Fill in report_type, report_id and field_index to get the information on a * field. */ #define HID_FIELD_CONSTANT 0x001 #define HID_FIELD_VARIABLE 0x002 #define HID_FIELD_RELATIVE 0x004 #define HID_FIELD_WRAP 0x008 #define HID_FIELD_NONLINEAR 0x010 #define HID_FIELD_NO_PREFERRED 0x020 #define HID_FIELD_NULL_STATE 0x040 #define HID_FIELD_VOLATILE 0x080 #define HID_FIELD_BUFFERED_BYTE 0x100 struct hiddev_usage_ref { __u32 report_type; __u32 report_id; __u32 field_index; __u32 usage_index; __u32 usage_code; __s32 value; }; /* hiddev_usage_ref_multi is used for sending multiple bytes to a control. * It really manifests itself as setting the value of consecutive usages */ #define HID_MAX_MULTI_USAGES 1024 struct hiddev_usage_ref_multi { struct hiddev_usage_ref uref; __u32 num_values; __s32 values[HID_MAX_MULTI_USAGES]; }; /* FIELD_INDEX_NONE is returned in read() data from the kernel when flags * is set to (HIDDEV_FLAG_UREF | HIDDEV_FLAG_REPORT) and a new report has * been sent by the device */ #define HID_FIELD_INDEX_NONE 0xffffffff /* * Protocol version. */ #define HID_VERSION 0x010004 /* * IOCTLs (0x00 - 0x7f) */ #define HIDIOCGVERSION _IOR('H', 0x01, int) #define HIDIOCAPPLICATION _IO('H', 0x02) #define HIDIOCGDEVINFO _IOR('H', 0x03, struct hiddev_devinfo) #define HIDIOCGSTRING _IOR('H', 0x04, struct hiddev_string_descriptor) #define HIDIOCINITREPORT _IO('H', 0x05) #define HIDIOCGNAME(len) _IOC(_IOC_READ, 'H', 0x06, len) #define HIDIOCGREPORT _IOW('H', 0x07, struct hiddev_report_info) #define HIDIOCSREPORT _IOW('H', 0x08, struct hiddev_report_info) #define HIDIOCGREPORTINFO _IOWR('H', 0x09, struct hiddev_report_info) #define HIDIOCGFIELDINFO _IOWR('H', 0x0A, struct hiddev_field_info) #define HIDIOCGUSAGE _IOWR('H', 0x0B, struct hiddev_usage_ref) #define HIDIOCSUSAGE _IOW('H', 0x0C, struct hiddev_usage_ref) #define HIDIOCGUCODE _IOWR('H', 0x0D, struct hiddev_usage_ref) #define HIDIOCGFLAG _IOR('H', 0x0E, int) #define HIDIOCSFLAG _IOW('H', 0x0F, int) #define HIDIOCGCOLLECTIONINDEX _IOW('H', 0x10, struct hiddev_usage_ref) #define HIDIOCGCOLLECTIONINFO _IOWR('H', 0x11, struct hiddev_collection_info) #define HIDIOCGPHYS(len) _IOC(_IOC_READ, 'H', 0x12, len) /* For writing/reading to multiple/consecutive usages */ #define HIDIOCGUSAGES _IOWR('H', 0x13, struct hiddev_usage_ref_multi) #define HIDIOCSUSAGES _IOW('H', 0x14, struct hiddev_usage_ref_multi) /* * Flags to be used in HIDIOCSFLAG */ #define HIDDEV_FLAG_UREF 0x1 #define HIDDEV_FLAG_REPORT 0x2 #define HIDDEV_FLAGS 0x3 /* To traverse the input report descriptor info for a HID device, perform the * following: * * rinfo.report_type = HID_REPORT_TYPE_INPUT; * rinfo.report_id = HID_REPORT_ID_FIRST; * ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo); * * while (ret >= 0) { * for (i = 0; i < rinfo.num_fields; i++) { * finfo.report_type = rinfo.report_type; * finfo.report_id = rinfo.report_id; * finfo.field_index = i; * ioctl(fd, HIDIOCGFIELDINFO, &finfo); * for (j = 0; j < finfo.maxusage; j++) { * uref.report_type = rinfo.report_type; * uref.report_id = rinfo.report_id; * uref.field_index = i; * uref.usage_index = j; * ioctl(fd, HIDIOCGUCODE, &uref); * ioctl(fd, HIDIOCGUSAGE, &uref); * } * } * rinfo.report_id |= HID_REPORT_ID_NEXT; * ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo); * } */ #endif /* _HIDDEV_H */