include/uapi/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
  25 enum uhid_event_type {
  26         UHID_CREATE,
  27         UHID_DESTROY,
  28         UHID_START,
  29         UHID_STOP,
  30         UHID_OPEN,
  31         UHID_CLOSE,
  32         UHID_OUTPUT,
  33         UHID_OUTPUT_EV,                 /* obsolete! */
  34         UHID_INPUT,
  35         UHID_FEATURE,
  36         UHID_FEATURE_ANSWER,
  37 };
  38
  39 struct uhid_create_req {
  40         __u8 name[128];
  41         __u8 phys[64];
  42         __u8 uniq[64];
  43         __u8 __user *rd_data;
  44         __u16 rd_size;
  45
  46         __u16 bus;
  47         __u32 vendor;
  48         __u32 product;
  49         __u32 version;
  50         __u32 country;
  51 } __attribute__((__packed__));
  52
  53 #define UHID_DATA_MAX 4096
  54
  55 enum uhid_report_type {
  56         UHID_FEATURE_REPORT,
  57         UHID_OUTPUT_REPORT,
  58         UHID_INPUT_REPORT,
  59 };
  60
  61 struct uhid_input_req {
  62         __u8 data[UHID_DATA_MAX];
  63         __u16 size;
  64 } __attribute__((__packed__));
  65
  66 struct uhid_output_req {
  67         __u8 data[UHID_DATA_MAX];
  68         __u16 size;
  69         __u8 rtype;
  70 } __attribute__((__packed__));
  71
  72 /* Obsolete! Newer kernels will no longer send these events but instead convert
  73  * it into raw output reports via UHID_OUTPUT. */
  74 struct uhid_output_ev_req {
  75         __u16 type;
  76         __u16 code;
  77         __s32 value;
  78 } __attribute__((__packed__));
  79
  80 struct uhid_feature_req {
  81         __u32 id;
  82         __u8 rnum;
  83         __u8 rtype;
  84 } __attribute__((__packed__));
  85
  86 struct uhid_feature_answer_req {
  87         __u32 id;
  88         __u16 err;
  89         __u16 size;
  90         __u8 data[UHID_DATA_MAX];
  91 } __attribute__((__packed__));
  92
  93 struct uhid_event {
  94         __u32 type;
  95
  96         union {
  97                 struct uhid_create_req create;
  98                 struct uhid_input_req input;
  99                 struct uhid_output_req output;
 100                 struct uhid_output_ev_req output_ev;
 101                 struct uhid_feature_req feature;
 102                 struct uhid_feature_answer_req feature_answer;
 103         } u;
 104 } __attribute__((__packed__));
 105
 106 #endif /* __UHID_H_ */