--- /dev/null
+/* 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 */
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