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Linux/include/uapi/linux/dvb/ca.h

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  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  * This program is free software; you can redistribute it and/or
 10  * modify it under the terms of the GNU General Lesser Public License
 11  * as published by the Free Software Foundation; either version 2.1
 12  * of the License, or (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU Lesser General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 22  *
 23  */
 24 
 25 #ifndef _DVBCA_H_
 26 #define _DVBCA_H_
 27 
 28 /**
 29  * struct ca_slot_info - CA slot interface types and info.
 30  *
 31  * @num:        slot number.
 32  * @type:       slot type.
 33  * @flags:      flags applicable to the slot.
 34  *
 35  * This struct stores the CA slot information.
 36  *
 37  * @type can be:
 38  *
 39  *      - %CA_CI - CI high level interface;
 40  *      - %CA_CI_LINK - CI link layer level interface;
 41  *      - %CA_CI_PHYS - CI physical layer level interface;
 42  *      - %CA_DESCR - built-in descrambler;
 43  *      - %CA_SC -simple smart card interface.
 44  *
 45  * @flags can be:
 46  *
 47  *      - %CA_CI_MODULE_PRESENT - module (or card) inserted;
 48  *      - %CA_CI_MODULE_READY - module is ready for usage.
 49  */
 50 
 51 struct ca_slot_info {
 52         int num;
 53         int type;
 54 #define CA_CI            1
 55 #define CA_CI_LINK       2
 56 #define CA_CI_PHYS       4
 57 #define CA_DESCR         8
 58 #define CA_SC          128
 59 
 60         unsigned int flags;
 61 #define CA_CI_MODULE_PRESENT 1
 62 #define CA_CI_MODULE_READY   2
 63 };
 64 
 65 
 66 /**
 67  * struct ca_descr_info - descrambler types and info.
 68  *
 69  * @num:        number of available descramblers (keys).
 70  * @type:       type of supported scrambling system.
 71  *
 72  * Identifies the number of descramblers and their type.
 73  *
 74  * @type can be:
 75  *
 76  *      - %CA_ECD - European Common Descrambler (ECD) hardware;
 77  *      - %CA_NDS - Videoguard (NDS) hardware;
 78  *      - %CA_DSS - Distributed Sample Scrambling (DSS) hardware.
 79  */
 80 struct ca_descr_info {
 81         unsigned int num;
 82         unsigned int type;
 83 #define CA_ECD           1
 84 #define CA_NDS           2
 85 #define CA_DSS           4
 86 };
 87 
 88 /**
 89  * struct ca_caps - CA slot interface capabilities.
 90  *
 91  * @slot_num:   total number of CA card and module slots.
 92  * @slot_type:  bitmap with all supported types as defined at
 93  *              &struct ca_slot_info (e. g. %CA_CI, %CA_CI_LINK, etc).
 94  * @descr_num:  total number of descrambler slots (keys)
 95  * @descr_type: bitmap with all supported types as defined at
 96  *              &struct ca_descr_info (e. g. %CA_ECD, %CA_NDS, etc).
 97  */
 98 struct ca_caps {
 99         unsigned int slot_num;
100         unsigned int slot_type;
101         unsigned int descr_num;
102         unsigned int descr_type;
103 };
104 
105 /**
106  * struct ca_msg - a message to/from a CI-CAM
107  *
108  * @index:      unused
109  * @type:       unused
110  * @length:     length of the message
111  * @msg:        message
112  *
113  * This struct carries a message to be send/received from a CI CA module.
114  */
115 struct ca_msg {
116         unsigned int index;
117         unsigned int type;
118         unsigned int length;
119         unsigned char msg[256];
120 };
121 
122 /**
123  * struct ca_descr - CA descrambler control words info
124  *
125  * @index: CA Descrambler slot
126  * @parity: control words parity, where 0 means even and 1 means odd
127  * @cw: CA Descrambler control words
128  */
129 struct ca_descr {
130         unsigned int index;
131         unsigned int parity;
132         unsigned char cw[8];
133 };
134 
135 #define CA_RESET          _IO('o', 128)
136 #define CA_GET_CAP        _IOR('o', 129, struct ca_caps)
137 #define CA_GET_SLOT_INFO  _IOR('o', 130, struct ca_slot_info)
138 #define CA_GET_DESCR_INFO _IOR('o', 131, struct ca_descr_info)
139 #define CA_GET_MSG        _IOR('o', 132, struct ca_msg)
140 #define CA_SEND_MSG       _IOW('o', 133, struct ca_msg)
141 #define CA_SET_DESCR      _IOW('o', 134, struct ca_descr)
142 
143 #if !defined(__KERNEL__)
144 
145 /* This is needed for legacy userspace support */
146 typedef struct ca_slot_info ca_slot_info_t;
147 typedef struct ca_descr_info  ca_descr_info_t;
148 typedef struct ca_caps  ca_caps_t;
149 typedef struct ca_msg ca_msg_t;
150 typedef struct ca_descr ca_descr_t;
151 
152 #endif
153 
154 
155 #endif
156 

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