l4/pkg/linux-26-headers/include/linux/uhid.h

   1 #ifndef __UHID_H_
   2 #define __UHID_H_
   3
   4 /*
   5  * User-space I/O driver support for HID subsystem
   6  * Copyright (c) 2012 David Herrmann
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  */
  15
  16 /*
  17  * Public header for user-space communication. We try to keep every structure
  18  * aligned but to be safe we also use __attribute__((__packed__)). Therefore,
  19  * the communication should be ABI compatible even between architectures.
  20  */
  21
  22 #include <linux/input.h>
  23 #include <linux/types.h>
  24 #include <linux/hid.h>
  25
  26 enum uhid_event_type {
  27         UHID_CREATE,
  28         UHID_DESTROY,
  29         UHID_START,
  30         UHID_STOP,
  31         UHID_OPEN,
  32         UHID_CLOSE,
  33         UHID_OUTPUT,
  34         UHID_OUTPUT_EV,                 /* obsolete! */
  35         UHID_INPUT,
  36         UHID_FEATURE,
  37         UHID_FEATURE_ANSWER,
  38         UHID_CREATE2,
  39         UHID_INPUT2,
  40 };
  41
  42 struct uhid_create_req {
  43         __u8 name[128];
  44         __u8 phys[64];
  45         __u8 uniq[64];
  46         __u8 *rd_data;
  47         __u16 rd_size;
  48
  49         __u16 bus;
  50         __u32 vendor;
  51         __u32 product;
  52         __u32 version;
  53         __u32 country;
  54 } __attribute__((__packed__));
  55
  56 struct uhid_create2_req {
  57         __u8 name[128];
  58         __u8 phys[64];
  59         __u8 uniq[64];
  60         __u16 rd_size;
  61         __u16 bus;
  62         __u32 vendor;
  63         __u32 product;
  64         __u32 version;
  65         __u32 country;
  66         __u8 rd_data[HID_MAX_DESCRIPTOR_SIZE];
  67 } __attribute__((__packed__));
  68
  69 #define UHID_DATA_MAX 4096
  70
  71 enum uhid_report_type {
  72         UHID_FEATURE_REPORT,
  73         UHID_OUTPUT_REPORT,
  74         UHID_INPUT_REPORT,
  75 };
  76
  77 struct uhid_input_req {
  78         __u8 data[UHID_DATA_MAX];
  79         __u16 size;
  80 } __attribute__((__packed__));
  81
  82 struct uhid_input2_req {
  83         __u16 size;
  84         __u8 data[UHID_DATA_MAX];
  85 } __attribute__((__packed__));
  86
  87 struct uhid_output_req {
  88         __u8 data[UHID_DATA_MAX];
  89         __u16 size;
  90         __u8 rtype;
  91 } __attribute__((__packed__));
  92
  93 /* Obsolete! Newer kernels will no longer send these events but instead convert
  94  * it into raw output reports via UHID_OUTPUT. */
  95 struct uhid_output_ev_req {
  96         __u16 type;
  97         __u16 code;
  98         __s32 value;
  99 } __attribute__((__packed__));
 100
 101 struct uhid_feature_req {
 102         __u32 id;
 103         __u8 rnum;
 104         __u8 rtype;
 105 } __attribute__((__packed__));
 106
 107 struct uhid_feature_answer_req {
 108         __u32 id;
 109         __u16 err;
 110         __u16 size;
 111         __u8 data[UHID_DATA_MAX];
 112 } __attribute__((__packed__));
 113
 114 struct uhid_event {
 115         __u32 type;
 116
 117         union {
 118                 struct uhid_create_req create;
 119                 struct uhid_input_req input;
 120                 struct uhid_output_req output;
 121                 struct uhid_output_ev_req output_ev;
 122                 struct uhid_feature_req feature;
 123                 struct uhid_feature_answer_req feature_answer;
 124                 struct uhid_create2_req create2;
 125                 struct uhid_input2_req input2;
 126         } u;
 127 } __attribute__((__packed__));
 128
 129 #endif /* __UHID_H_ */