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Diffstat (limited to 'Documentation/DocBook/media/dvb/ca.xml')
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1 files changed, 229 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/dvb/ca.xml b/Documentation/DocBook/media/dvb/ca.xml new file mode 100644 index 00000000000..5c4adb44b1c --- /dev/null +++ b/Documentation/DocBook/media/dvb/ca.xml @@ -0,0 +1,229 @@ +<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"> +<title>ca_slot_info_t</title> + <programlisting> +typedef struct ca_slot_info { + 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_DESCR 8 /⋆ built-in descrambler ⋆/ +#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"> +<title>ca_descr_info_t</title> +<programlisting> +typedef struct ca_descr_info { + 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-caps"> +<title>ca_caps_t</title> +<programlisting> +typedef struct ca_caps { + 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"> +<title>ca_msg_t</title> +<programlisting> +/⋆ a message to/from a CI-CAM ⋆/ +typedef struct ca_msg { + unsigned int index; + unsigned int type; + unsigned int length; + unsigned char msg[256]; +} ca_msg_t; +</programlisting> + +</section> +<section id="ca-descr"> +<title>ca_descr_t</title> +<programlisting> +typedef struct ca_descr { + unsigned int index; + unsigned int parity; + unsigned char cw[8]; +} ca_descr_t; +</programlisting> +</section> + +<section id="ca-pid"> +<title>ca-pid</title> +<programlisting> +typedef struct ca_pid { + unsigned int pid; + int index; /⋆ -1 == disable⋆/ +} ca_pid_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>RETURN VALUE</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>RETURN VALUE</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> |