include/uapi/linux/dvb/ca.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
   2 /*
   3  * ca.h
   4  *
   5  * Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
   6  *                  & Marcus Metzler <marcus@convergence.de>
   7  *                    for convergence integrated media GmbH
   8  */
   9
  10 #ifndef _DVBCA_H_
  11 #define _DVBCA_H_
  12
  13 /**
  14  * struct ca_slot_info - CA slot interface types and info.
  15  *
  16  * @num:        slot number.
  17  * @type:       slot type.
  18  * @flags:      flags applicable to the slot.
  19  *
  20  * This struct stores the CA slot information.
  21  *
  22  * @type can be:
  23  *
  24  *      - %CA_CI - CI high level interface;
  25  *      - %CA_CI_LINK - CI link layer level interface;
  26  *      - %CA_CI_PHYS - CI physical layer level interface;
  27  *      - %CA_DESCR - built-in descrambler;
  28  *      - %CA_SC -simple smart card interface.
  29  *
  30  * @flags can be:
  31  *
  32  *      - %CA_CI_MODULE_PRESENT - module (or card) inserted;
  33  *      - %CA_CI_MODULE_READY - module is ready for usage.
  34  */
  35
  36 struct ca_slot_info {
  37         int num;
  38         int type;
  39 #define CA_CI            1
  40 #define CA_CI_LINK       2
  41 #define CA_CI_PHYS       4
  42 #define CA_DESCR         8
  43 #define CA_SC          128
  44
  45         unsigned int flags;
  46 #define CA_CI_MODULE_PRESENT 1
  47 #define CA_CI_MODULE_READY   2
  48 };
  49
  50
  51 /**
  52  * struct ca_descr_info - descrambler types and info.
  53  *
  54  * @num:        number of available descramblers (keys).
  55  * @type:       type of supported scrambling system.
  56  *
  57  * Identifies the number of descramblers and their type.
  58  *
  59  * @type can be:
  60  *
  61  *      - %CA_ECD - European Common Descrambler (ECD) hardware;
  62  *      - %CA_NDS - Videoguard (NDS) hardware;
  63  *      - %CA_DSS - Distributed Sample Scrambling (DSS) hardware.
  64  */
  65 struct ca_descr_info {
  66         unsigned int num;
  67         unsigned int type;
  68 #define CA_ECD           1
  69 #define CA_NDS           2
  70 #define CA_DSS           4
  71 };
  72
  73 /**
  74  * struct ca_caps - CA slot interface capabilities.
  75  *
  76  * @slot_num:   total number of CA card and module slots.
  77  * @slot_type:  bitmap with all supported types as defined at
  78  *              &struct ca_slot_info (e. g. %CA_CI, %CA_CI_LINK, etc).
  79  * @descr_num:  total number of descrambler slots (keys)
  80  * @descr_type: bitmap with all supported types as defined at
  81  *              &struct ca_descr_info (e. g. %CA_ECD, %CA_NDS, etc).
  82  */
  83 struct ca_caps {
  84         unsigned int slot_num;
  85         unsigned int slot_type;
  86         unsigned int descr_num;
  87         unsigned int descr_type;
  88 };
  89
  90 /**
  91  * struct ca_msg - a message to/from a CI-CAM
  92  *
  93  * @index:      unused
  94  * @type:       unused
  95  * @length:     length of the message
  96  * @msg:        message
  97  *
  98  * This struct carries a message to be send/received from a CI CA module.
  99  */
 100 struct ca_msg {
 101         unsigned int index;
 102         unsigned int type;
 103         unsigned int length;
 104         unsigned char msg[256];
 105 };
 106
 107 /**
 108  * struct ca_descr - CA descrambler control words info
 109  *
 110  * @index: CA Descrambler slot
 111  * @parity: control words parity, where 0 means even and 1 means odd
 112  * @cw: CA Descrambler control words
 113  */
 114 struct ca_descr {
 115         unsigned int index;
 116         unsigned int parity;
 117         unsigned char cw[8];
 118 };
 119
 120 #define CA_RESET          _IO('o', 128)
 121 #define CA_GET_CAP        _IOR('o', 129, struct ca_caps)
 122 #define CA_GET_SLOT_INFO  _IOR('o', 130, struct ca_slot_info)
 123 #define CA_GET_DESCR_INFO _IOR('o', 131, struct ca_descr_info)
 124 #define CA_GET_MSG        _IOR('o', 132, struct ca_msg)
 125 #define CA_SEND_MSG       _IOW('o', 133, struct ca_msg)
 126 #define CA_SET_DESCR      _IOW('o', 134, struct ca_descr)
 127
 128 #if !defined(__KERNEL__)
 129
 130 /* This is needed for legacy userspace support */
 131 typedef struct ca_slot_info ca_slot_info_t;
 132 typedef struct ca_descr_info  ca_descr_info_t;
 133 typedef struct ca_caps  ca_caps_t;
 134 typedef struct ca_msg ca_msg_t;
 135 typedef struct ca_descr ca_descr_t;
 136
 137 #endif
 138
 139
 140 #endif