1.. SPDX-License-Identifier: GPL-2.0 2 3Digital TV Conditional Access Interface 4======================================= 5 6 7.. note:: 8 9 This documentation is outdated. 10 11This document describes the usage of the high level CI API as 12in accordance to the Linux DVB API. This is a not a documentation for the, 13existing low level CI API. 14 15.. note:: 16 17 For the Twinhan/Twinhan clones, the dst_ca module handles the CI 18 hardware handling. This module is loaded automatically if a CI 19 (Common Interface, that holds the CAM (Conditional Access Module) 20 is detected. 21 22ca_zap 23~~~~~~ 24 25A userspace application, like ``ca_zap`` is required to handle encrypted 26MPEG-TS streams. 27 28The ``ca_zap`` userland application is in charge of sending the 29descrambling related information to the Conditional Access Module (CAM). 30 31This application requires the following to function properly as of now. 32 33a) Tune to a valid channel, with szap. 34 35 eg: $ szap -c channels.conf -r "TMC" -x 36 37b) a channels.conf containing a valid PMT PID 38 39 eg: TMC:11996:h:0:27500:278:512:650:321 40 41 here 278 is a valid PMT PID. the rest of the values are the 42 same ones that szap uses. 43 44c) after running a szap, you have to run ca_zap, for the 45 descrambler to function, 46 47 eg: $ ca_zap channels.conf "TMC" 48 49d) Hopefully enjoy your favourite subscribed channel as you do with 50 a FTA card. 51 52.. note:: 53 54 Currently ca_zap, and dst_test, both are meant for demonstration 55 purposes only, they can become full fledged applications if necessary. 56 57 58Cards that fall in this category 59~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 60 61At present the cards that fall in this category are the Twinhan and its 62clones, these cards are available as VVMER, Tomato, Hercules, Orange and 63so on. 64 65CI modules that are supported 66~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 67 68The CI module support is largely dependent upon the firmware on the cards 69Some cards do support almost all of the available CI modules. There is 70nothing much that can be done in order to make additional CI modules 71working with these cards. 72 73Modules that have been tested by this driver at present are 74 75(1) Irdeto 1 and 2 from SCM 76(2) Viaccess from SCM 77(3) Dragoncam 78