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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
37struct hiddev_event {
38 unsigned hid;
39 signed int value;
40};
41
42struct 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
53struct hiddev_collection_info {
54 __u32 index;
55 __u32 type;
56 __u32 usage;
57 __u32 level;
58};
59
60#define HID_STRING_SIZE 256
61struct hiddev_string_descriptor {
62 __s32 index;
63 char value[HID_STRING_SIZE];
64};
65
66struct 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
91struct 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
121struct 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
133struct 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 */