Preview: ca.h
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//usr/include/linux/dvb/ca.h
/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
/*
* ca.h
*
* Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
* & Marcus Metzler <marcus@convergence.de>
* for convergence integrated media GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Lesser Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _DVBCA_H_
#define _DVBCA_H_
/**
* struct ca_slot_info - CA slot interface types and info.
*
* @num: slot number.
* @type: slot type.
* @flags: flags applicable to the slot.
*
* This struct stores the CA slot information.
*
* @type can be:
*
* - %CA_CI - CI high level interface;
* - %CA_CI_LINK - CI link layer level interface;
* - %CA_CI_PHYS - CI physical layer level interface;
* - %CA_DESCR - built-in descrambler;
* - %CA_SC -simple smart card interface.
*
* @flags can be:
*
* - %CA_CI_MODULE_PRESENT - module (or card) inserted;
* - %CA_CI_MODULE_READY - module is ready for usage.
*/
struct ca_slot_info {
int num;
int type;
#define CA_CI 1
#define CA_CI_LINK 2
#define CA_CI_PHYS 4
#define CA_DESCR 8
#define CA_SC 128
unsigned int flags;
#define CA_CI_MODULE_PRESENT 1
#define CA_CI_MODULE_READY 2
};
/**
* struct ca_descr_info - descrambler types and info.
*
* @num: number of available descramblers (keys).
* @type: type of supported scrambling system.
*
* Identifies the number of descramblers and their type.
*
* @type can be:
*
* - %CA_ECD - European Common Descrambler (ECD) hardware;
* - %CA_NDS - Videoguard (NDS) hardware;
* - %CA_DSS - Distributed Sample Scrambling (DSS) hardware.
*/
struct ca_descr_info {
unsigned int num;
unsigned int type;
#define CA_ECD 1
#define CA_NDS 2
#define CA_DSS 4
};
/**
* struct ca_caps - CA slot interface capabilities.
*
* @slot_num: total number of CA card and module slots.
* @slot_type: bitmap with all supported types as defined at
* &struct ca_slot_info (e. g. %CA_CI, %CA_CI_LINK, etc).
* @descr_num: total number of descrambler slots (keys)
* @descr_type: bitmap with all supported types as defined at
* &struct ca_descr_info (e. g. %CA_ECD, %CA_NDS, etc).
*/
struct ca_caps {
unsigned int slot_num;
unsigned int slot_type;
unsigned int descr_num;
unsigned int descr_type;
};
/**
* struct ca_msg - a message to/from a CI-CAM
*
* @index: unused
* @type: unused
* @length: length of the message
* @msg: message
*
* This struct carries a message to be send/received from a CI CA module.
*/
struct ca_msg {
unsigned int index;
unsigned int type;
unsigned int length;
unsigned char msg[256];
};
/**
* struct ca_descr - CA descrambler control words info
*
* @index: CA Descrambler slot
* @parity: control words parity, where 0 means even and 1 means odd
* @cw: CA Descrambler control words
*/
struct ca_descr {
unsigned int index;
unsigned int parity;
unsigned char cw[8];
};
#define CA_RESET _IO('o', 128)
#define CA_GET_CAP _IOR('o', 129, struct ca_caps)
#define CA_GET_SLOT_INFO _IOR('o', 130, struct ca_slot_info)
#define CA_GET_DESCR_INFO _IOR('o', 131, struct ca_descr_info)
#define CA_GET_MSG _IOR('o', 132, struct ca_msg)
#define CA_SEND_MSG _IOW('o', 133, struct ca_msg)
#define CA_SET_DESCR _IOW('o', 134, struct ca_descr)
/* This is needed for legacy userspace support */
typedef struct ca_slot_info ca_slot_info_t;
typedef struct ca_descr_info ca_descr_info_t;
typedef struct ca_caps ca_caps_t;
typedef struct ca_msg ca_msg_t;
typedef struct ca_descr ca_descr_t;
#endif
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