mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 09:56:00 +00:00
8e080c2e6c
The V4L and DVB API's are there for a long time. however, up to now, no efforts were done to merge them to kernel DocBook. This patch adds the current versions of the specs as an unique compendium. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
222 lines
6.0 KiB
XML
222 lines
6.0 KiB
XML
<title>DVB CA Device</title>
|
|
<para>The DVB CA device controls the conditional access hardware. It can be accessed through
|
|
<emphasis role="tt">/dev/dvb/adapter0/ca0</emphasis>. Data types and and ioctl definitions can be accessed by
|
|
including <emphasis role="tt">linux/dvb/ca.h</emphasis> in your application.
|
|
</para>
|
|
|
|
<section id="ca_data_types">
|
|
<title>CA Data Types</title>
|
|
|
|
|
|
<section id="ca_slot_info_t">
|
|
<title>ca_slot_info_t</title>
|
|
<programlisting>
|
|
/⋆ slot interface types and info ⋆/
|
|
|
|
typedef struct ca_slot_info_s {
|
|
int num; /⋆ slot number ⋆/
|
|
|
|
int type; /⋆ CA interface this slot supports ⋆/
|
|
#define CA_CI 1 /⋆ CI high level interface ⋆/
|
|
#define CA_CI_LINK 2 /⋆ CI link layer level interface ⋆/
|
|
#define CA_CI_PHYS 4 /⋆ CI physical layer level interface ⋆/
|
|
#define CA_SC 128 /⋆ simple smart card interface ⋆/
|
|
|
|
unsigned int flags;
|
|
#define CA_CI_MODULE_PRESENT 1 /⋆ module (or card) inserted ⋆/
|
|
#define CA_CI_MODULE_READY 2
|
|
} ca_slot_info_t;
|
|
</programlisting>
|
|
|
|
</section>
|
|
<section id="ca_descr_info_t">
|
|
<title>ca_descr_info_t</title>
|
|
<programlisting>
|
|
typedef struct ca_descr_info_s {
|
|
unsigned int num; /⋆ number of available descramblers (keys) ⋆/
|
|
unsigned int type; /⋆ type of supported scrambling system ⋆/
|
|
#define CA_ECD 1
|
|
#define CA_NDS 2
|
|
#define CA_DSS 4
|
|
} ca_descr_info_t;
|
|
</programlisting>
|
|
|
|
</section>
|
|
<section id="ca_cap_t">
|
|
<title>ca_cap_t</title>
|
|
<programlisting>
|
|
typedef struct ca_cap_s {
|
|
unsigned int slot_num; /⋆ total number of CA card and module slots ⋆/
|
|
unsigned int slot_type; /⋆ OR of all supported types ⋆/
|
|
unsigned int descr_num; /⋆ total number of descrambler slots (keys) ⋆/
|
|
unsigned int descr_type;/⋆ OR of all supported types ⋆/
|
|
} ca_cap_t;
|
|
</programlisting>
|
|
|
|
</section>
|
|
<section id="ca_msg_t">
|
|
<title>ca_msg_t</title>
|
|
<programlisting>
|
|
/⋆ a message to/from a CI-CAM ⋆/
|
|
typedef struct ca_msg_s {
|
|
unsigned int index;
|
|
unsigned int type;
|
|
unsigned int length;
|
|
unsigned char msg[256];
|
|
} ca_msg_t;
|
|
</programlisting>
|
|
|
|
</section>
|
|
<section id="ca_descr_t">
|
|
<title>ca_descr_t</title>
|
|
<programlisting>
|
|
typedef struct ca_descr_s {
|
|
unsigned int index;
|
|
unsigned int parity;
|
|
unsigned char cw[8];
|
|
} ca_descr_t;
|
|
</programlisting>
|
|
</section></section>
|
|
<section id="ca_function_calls">
|
|
<title>CA Function Calls</title>
|
|
|
|
|
|
<section id="ca_fopen">
|
|
<title>open()</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This system call opens a named ca device (e.g. /dev/ost/ca) for subsequent use.</para>
|
|
<para>When an open() call has succeeded, the device will be ready for use.
|
|
The significance of blocking or non-blocking mode is described in the
|
|
documentation for functions where there is a difference. It does not affect the
|
|
semantics of the open() call itself. A device opened in blocking mode can later
|
|
be put into non-blocking mode (and vice versa) using the F_SETFL command
|
|
of the fcntl system call. This is a standard system call, documented in the Linux
|
|
manual page for fcntl. Only one user can open the CA Device in O_RDWR
|
|
mode. All other attempts to open the device in this mode will fail, and an error
|
|
code will be returned.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int open(const char ⋆deviceName, int flags);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>const char
|
|
*deviceName</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Name of specific video device.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int flags</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>A bit-wise OR of the following flags:</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>O_RDONLY read-only access</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>O_RDWR read/write access</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>O_NONBLOCK open in non-blocking mode</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>(blocking mode is the default)</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>ENODEV</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Device driver not loaded/available.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EBUSY</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Device or resource busy.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Invalid argument.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section>
|
|
<section id="ca_fclose">
|
|
<title>close()</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This system call closes a previously opened audio device.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int close(int fd);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
</section>
|
|
</section>
|